channel quality measurement in unlicensed implementations

专利摘要:
The extent of NB-IoT and eMTC communications in the unlicensed spectrum introduces several problems associated with measuring and reporting channel quality. A computer-readable method, device and medium are presented that provide a technique for measuring and reporting channel quality that addresses these problems. An UE apparatus measures a CQI measurement for each of a plurality of hop frequency groups, in which a set of hop frequencies is grouped within the plurality of groups and reports a CQI for each of the plurality of groups. A base station can configure the UE for the CQI report and can receive a CQI for each of a plurality of hop frequency groups, in which a set of hop frequencies is grouped within the plurality of groups. The set of hop frequencies comprises frequencies in an unlicensed spectrum.
公开号:BR112020000314A2
申请号:R112020000314-0
申请日:2018-06-07
公开日:2020-07-14
发明作者:Srinivas Yerramalli；Chih-Hao Liu；Tamer Kadous
申请人:Qualcomm Incorporated；
IPC主号:

专利说明:

[0001] [0001] This application claims the benefit of the North American Provisional Order Serial No. 62 / 532,676, entitled "CHANNEL QUALITY MEASUREMENT IN NON-LICENSED IMPLEMENTATIONS" and filed on July 14, 2017, and the North American Patent Application No. 16 / 001,155, entitled "CHANNEL QUALITY MEASUREMENT IN NON-LICENSED IMPLEMENTATIONS" and filed on June 6, 2018, which are expressly incorporated by reference in this document in its entirety.
[0002] [0002] This description refers in general to communication systems and, more particularly, the measurement and reporting of channel quality in narrowband communication in the unlicensed frequency band. Foundations
[0003] [0003] Wireless communication systems are widely implemented to provide various telecommunications services, such as telephony, video, data, message exchange and broadcasts. Typical wireless communication systems can employ multiple access technologies capable of supporting communication with multiple users, sharing available system resources. Examples of these multiple access technologies include code division multiple access systems (CDMA), time division multiple access systems (TDMA), frequency division multiple access systems (FDMA), multiple division access systems orthogonal frequency (OFDMA), multiple access systems by single carrier frequency division (SC-FDMA) and multiple access systems by time division synchronous code division (TD-SCDMA).
[0004] [0004] These multiple access technologies have been adopted in various telecommunications standards to provide a common protocol that allows different wireless devices to communicate at the municipal, national, regional and even global levels. An example of a telecommunications standard is Long Term Evolution (LTE). LTE is a set of improvements to the mobile standard of the Universal Mobile Telecommunications System (UMTS), promulgated by the 3rd Generation Partnership Project (3GPP). LTE was designed to support access to mobile broadband through improved spectral efficiency, reduced costs and improved services using OFDMA on the downlink, SC-FDMA on the uplink and antenna technology by multiple inputs and outputs (MIMO). However, as the demand for mobile broadband access continues to increase, there is a need for further improvements in LTE technology. These improvements may also apply to other multiple access technologies and to the telecommunications standards that employ those technologies.
[0005] [0005] Narrowband communication provides a mechanism for implementing low power communications. These narrowband communications are also being extended to the unlicensed spectrum. Narrowband communications involve communication with a limited frequency bandwidth compared to the frequency bandwidth used in LTE communications. An example of narrowband communication is the narrowband internet of things (IoT) (NB) (NB-IoT), which is limited to a single block of system bandwidth resources (RB), for example, 180 kHz. Another example of narrowband communication is enhanced machine-type communication (eMTC), which is limited to six RBs of system bandwidth.
[0006] [0006] The extent of NB-IoT and eMTC communications in the unlicensed spectrum presents a number of problems associated with measuring and reporting channel quality for user equipment and base stations supporting eMTC and NB-IoT devices and other wireless devices that make use of the unlicensed spectrum. Therefore, there is a need for improved channel quality measurement and reporting mechanisms for base stations, for example, supporting narrowband communication in unlicensed wireless implementations. SUMMARY
[0007] [0007] The following is a simplified summary of one or more aspects, in order to provide a basic understanding of such aspects. This summary is not a comprehensive overview of all aspects covered, and its purpose is neither to identify key or critical elements of all aspects, nor to outline the scope of any or all aspects. Its sole purpose is to present some concepts of one or more aspects in a simplified way as a prelude to the more detailed description that is presented later.
[0008] [0008] In contrast to licensed LTE, where the number of narrow bands is limited to 4 per UE, in eMTC unlicensed LTE (eMTC-U), a UE can be configured to monitor many more narrow bands, for example, between 15 to 60 narrow bands. Due to this increased number of narrow bands, as well as other aspects of communication in the unlicensed spectrum, the UE can report the measurement of a narrow band with several seconds passed.
[0009] [0009] Additionally, in the unlicensed spectrum, there may be a significant amount of interference in specific isolated portions of the frequency band, in contrast to licensed LTE, where all base stations follow a random hop pattern across a wide spectrum and all canal occupants are known. If a UE is configured to report a broadband channel quality indicator (CQI), the broadband CQI will reflect an average that includes this high interference (low quality) measurement on the band part, along with the measurement of high quality for the remaining narrow band. If the CQI at these colliding frequencies is averaged over other hop frequencies, then it can reduce the capacity of the system due to the higher average interference across all monitored bands. Thus, broadband measurements that work on the licensed spectrum may not work on an unlicensed spectrum due to the occupation of the channel in very specific regions of the unlicensed band.
[0010] [0010] In addition, the frequency jump is pseudo-random, therefore, the interference in the current jump may not be correlated with the interference in the next jump.
[0011] [0011] The aspects presented in this document include a method and an apparatus to operate in an unlicensed or shared radio spectrum band, offering opportunities for greater data transmission capacity and also addressing the unique challenges in wireless communication transmission in narrow band. Specifically, aspects include techniques for dividing a set of jump frequencies into several groups and reporting CQI for each of these groups separately, for example, as if it were a regular broadband CQI.
[0012] [0012] In one aspect of the description, a method, a computer-readable medium and an apparatus are provided. The device can be user equipment. The apparatus measures a CQI measurement for each of a plurality of groups of hop frequencies, in which a set of hop frequencies is grouped within the plurality of groups and reports a CQI for each of the plurality of groups. Hop frequencies can comprise frequencies in the unlicensed spectrum. The jump frequencies within each group of the plurality of groups can be continuous in a standard jump order for the set of jump frequencies and can be discontinuous in physical frequency.
[0013] [0013] In another aspect of the description, a method, a computer-readable medium and an apparatus are provided. The device can be a base station. The device configures a user equipment for CSI reports and receives a CQI for each of a plurality of groups of hop frequencies, in which a set of hop frequencies is grouped within the plurality of groups. The apparatus can group the set of hop frequencies within the plurality of groups of hop frequencies. Hop frequencies can comprise frequencies in the unlicensed spectrum. The jump frequencies within each group of the plurality of groups can be continuous in a standard jump order for the set of jump frequencies and can be discontinuous in physical frequency.
[0014] [0014] For the achievement of the previous and related purposes, the one or more aspects comprise the characteristics completely described below and particularly pointed out in the claims. The following description and the accompanying drawings set out in detail certain characteristics illustrating one or more aspects. These characteristics are indicative, however, of only a few among the various ways in which the principles of various aspects can be employed, and this description is intended to include all of these aspects and their equivalents. BRIEF DESCRIPTION OF THE DRAWINGS
[0015] [0015] FIG. 1 is a diagram illustrating an example of a wireless communications system and an access network.
[0016] [0016] Figs. 2A, 2B, 2C and 2D are diagrams illustrating LTE examples of a DL frame structure, DL channels within the DL frame structure, a UL frame structure and UL channels within the UL frame structure, respectively.
[0017] [0017] FIG. 3 is a diagram illustrating an example of an evolved Node B (eNB) and user equipment (UE) in an access network.
[0018] [0018] FIG. 4 illustrates a portion of a narrowband frequency array.
[0019] [0019] FIG. 5 is a diagram of wireless communication between a base station and an UE.
[0020] [0020] FIG. 6 is a flow chart of a wireless communication method.
[0021] [0021] FIG. 7 is a conceptual data flow diagram illustrating the data flow between different media / components in an exemplary device.
[0022] [0022] FIG. 8 is a diagram illustrating an example of hardware implementation for an appliance employing a processing system.
[0023] [0023] FIG. 9 is a flow chart of a wireless communication method.
[0024] [0024] FIG. 10 is a conceptual data flow diagram illustrating the data flow between different media / components in an exemplary device.
[0025] [0025] FIG. 11 is a diagram illustrating an example of hardware implementation for an appliance employing a processing system.
[0026] [0026] FIG. 12 illustrates narrowband frequency groups with a hop pattern. DETAILED DESCRIPTION
[0027] [0027] The detailed description set out below, in connection with the accompanying drawings, is intended to be a description of various configurations and does not represent the only configurations in which the concepts described in this document can be practiced. The detailed description includes specific details for the purpose of providing a complete understanding of various concepts. However, it will be evident to those skilled in the art that these concepts can be practiced without these specific details. In some cases, well-known structures and components are shown in the form of a block diagram to avoid obscuring these concepts.
[0028] [0028] The extension of NB-IoT and eMTC communications in the unlicensed spectrum introduces several problems associated with channel quality measurement and reporting for user equipment and base stations supporting eMTC and NB-IoT devices and other wireless device implementations ( for example, unlicensed LTE nearby, Bluetooth Devices, Wi-Fi and ZigBee) that make use of the unlicensed spectrum. Therefore, there is a need for improved channel quality measurement and reporting mechanisms for base stations, for example, supporting narrowband communication in unlicensed wireless implementations.
[0029] [0029] In contrast to licensed LTE, where the number of narrow bands is limited to 4 per UE, in eMTC unlicensed LTE (eMTC-U), a UE can be configured to monitor many more narrow bands, for example, between 15 to 60 narrow bands. Due to this increased number of narrow bands, as well as other aspects of communication in the unlicensed spectrum, the UE can report the measurement of a narrow band with several seconds passed.
[0030] [0030] Additionally, in the unlicensed spectrum, there may be a significant amount of interference in specific isolated portions of the frequency band, in contrast to licensed LTE, where all base stations 102 follow a random hop pattern across a wide spectrum and all occupants of the channel are known. If a UE is configured to report a broadband CQI, the broadband CQI will reflect an average that includes this high interference (low quality) measurement on the band portion, along with the high quality measurement for the remaining narrow band . If the CQI at these colliding frequencies is averaged over other hop frequencies, then it can reduce the capacity of the system due to the higher average interference across all monitored bands. Thus, broadband measurements that work on the licensed spectrum may not work on an unlicensed spectrum due to the occupation of the channel in very specific regions of the unlicensed band.
[0031] [0031] In addition, the frequency jump is pseudo-random, therefore, the interference in the current jump may not be correlated with the interference in the next jump.
[0032] [0032] Aspects presented in this document include a method and apparatus for operating in an unlicensed or shared radio spectrum band, providing opportunities for enhanced enhanced data transmission capacity and also addressing the unique challenges in wireless communication transmission. in narrow band. Specifically, aspects include techniques for dividing a set of jump frequencies into several groups and reporting CQI for each of these groups separately, for example, as if it were a regular broadband CQI.
[0033] [0033] Various aspects of telecommunications systems will now be presented with reference to various devices and methods. These devices and methods will be described in the detailed description below and illustrated in the accompanying drawings by various blocks, components, circuits, processes, algorithms, etc. (collectively referred to as "elements"). These elements can be implemented using electronic hardware, computer software or any combination of them. Whether these elements are implemented as hardware or software depends on the particular application and the design restrictions imposed on the system as a whole.
[0034] [0034] As an example, an element, or any portion of an element, or any combination of elements can be implemented as a "processing system" that includes one or more processors. Examples of processors include microprocessors, microcontrollers, graphics processing units (GPUs), central processing units (CPUs), application processors, digital signal processors (DSPs), reduced instruction set computing (RISC) processors, systems in a chip (SoC), baseband processors, field programmable port arrangements (FPGAs), programmable logic devices (PLDs), state machines, logic port, discrete hardware circuits, and other suitable hardware configured to perform the various functionalities described throughout this description. One or more processors in the processing system can run the software. Software should be interpreted broadly to mean instructions, instruction sets, code, code segments, program code, programs, subprograms, software components, applications, software applications, software packages, routines, subroutines, objects , executables, threads of execution, procedures, functions, etc., whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
[0035] [0035] Therefore, in one or more example modalities, the functions described can be implemented in hardware, software or any combination thereof. If implemented in software, functions can be stored or coded as one or more instructions or code in a computer-readable medium. The computer readable medium includes computer storage medium. The storage medium can be any available medium that can be accessed by a computer. By way of example, and not as a limitation, these computer-readable media may comprise a random access memory (RAM), a read-only memory (ROM), an electrically erasable programmable ROM (EEPROM), optical disk storage, magnetic disk storage, other magnetic storage devices, combinations of the types of computer-readable media mentioned above, or any other medium that can be used to store computer-executable code in the form of instructions or data structures that can be accessed by a computer.
[0036] [0036] FIG. 1 is a diagram illustrating an example of a wireless communications system and an access network 100. The wireless communications system (also referred to as a wireless wide area network (WWAN)) includes base stations 102, UEs 104 and an Evolved Packet Core (EPC) 160. Base stations 102 can include macro cells (high power cell base station) and / or small cells (low power cell base station). Macro cells include eNBs. Small cells include femto cells, pico cells and micro cells.
[0037] [0037] Base stations 102 (collectively referred to as the Universal Evolved Universal Mobile Telecommunications System (UMTS) Radio Access Terrestrial Network (E-UTRAN)) interface with the EPC 160 through backhaul transport channel links 132 (for example, SI interface). In addition to the other functions, base stations 102 can perform one or more of the following functions: user data transfer, radio channel encryption and decryption, integrity protection, header compression, mobility control functions (for example , handover, dual connectivity), intercellular interference coordination, connection configuration and release, load balancing, non-access layer messages (NAS) for distribution, NAS node selection, synchronization, radio access network sharing (RAN ), multicast multimedia broadcast service (MBMS), equipment and subscriber tracking, RAN information management (RIM), alerting (paging), positioning and distribution of warning messages. Base stations 102 can communicate directly or indirectly (for example,
[0038] [0038] Base stations 102 can communicate wirelessly with UEs 104. Each of base stations 102 can provide communication coverage for a respective geographic coverage area 110. There may be overlapping geographical coverage areas 110. For example, small cell 102 'may have a coverage area 110' that overlaps coverage area 110 of one or more macro base stations 102. A network that includes both small cells and macro cells may be known as a heterogeneous network . A heterogeneous network can also include Evolved Home B Nodes (eNBs) (HeNBs), which can provide service to a restricted group known as a closed subscriber group (CSG). Communication links 120 between base stations 102 and UE 104 may include uplink (UL) transmissions (also referred to as reverse link) from UE 104 to base station 102 and / or downlink (DL) transmissions ( also referred to as a direct link) from a base station 102 to a UE
[0039] [0039] The wireless communications system may additionally include a Wi-Fi 150 access point (AP) in communication with Wi-Fi 152 stations (STAs) via communication links 154 on a 5 GHz unlicensed frequency spectrum When communicating on an unlicensed frequency spectrum, STAs 152 / AP 150 can perform a free channel assessment (CCA) prior to communication, in order to determine if the channel is available.
[0040] [0040] The small cell 102 'can operate in a licensed and / or unlicensed frequency spectrum. When operating on an unlicensed frequency spectrum, the small cell 102 'can employ LTE and use the same 5 GHz unlicensed frequency spectrum used by the Wi-Fi AP 150. The small cell 102', employing LTE on a spectrum of unlicensed frequency, can increase coverage and / or increase the capacity of the access network. LTE on an unlicensed spectrum can be referred to as unlicensed LTE (LTE-U), licensed assisted access (LAA) or MuLTEfire.
[0041] [0041] The millimeter wave base station (mmW) 180 can operate at frequencies mmW and / or frequencies close to mmW in communication with the UE 182. The extremely high frequency (EHF) is part of the RF in the electromagnetic spectrum. EHF has a range of 30 GHz to 300 GHz and a wavelength between 1 mm and 10 mm. Radio waves in the band can be referred to as a millimeter wave. Close to mmW it can extend downwards to a frequency of 3 GHz with a wavelength of 100 mm. The super high frequency band (SHF) extends between 3 GHz and 30 GHz, also referred to as centimeter wave. Communications using the radio frequency band mmW / close to mmW present extremely high loss of travel and a short range. The mmW 180 base station can use beamforming 184 with UE 182 to compensate for extremely high travel loss and short range.
[0042] [0042] The wireless communication system 100 can include 192 communication directly between UEs 104.
[0043] [0043] EPC 160 may include a Mobility Management Entity (MME) 162, other MMEs 164, a Server Gateway 166, a Broadcast Multicast Multimedia Service Gateway (MBMS) 168, a Broadcast Multicast Service Center (BM-SC ) 170 and a Packet Data Network (PDN) Gateway 172. MME 162 may be communicating with a Home Subscriber Server (HSS)
[0044] [0044] The base station can also be referred to as Node B, evolved Node B (eNB), an access point, a transceiver base station, a radio base station, a radio transceiver, a transceiver function, a set of services basic services (BSS), an extended service set (ESS) or some other appropriate terminology. Base station 102 provides an access point to EPC 160 for an UE 104. Examples of UEs 104 include a cell phone, a smart phone, a login protocol phone (SIP), a laptop, a personal digital assistant ( PDA), a satellite radio, a global positioning system, a multimedia device, a video device, a digital audio player (for example, MP3 player), a camera, a video game console, a tablet, a device smart device, a wearable device or any other similar operating device. UE 104 can also be referred to as a station, a mobile station, a subscriber station, a mobile unit, a subscriber unit, a wireless unit, a remote unit, a mobile device, a wireless device, a wireless device wireless communication, a remote device, a mobile subscriber station, an access terminal, a mobile terminal, a wireless terminal, a remote terminal, a telephone device, a user agent, a mobile client, a customer or some other proper terminology.
[0045] [0045] Referring again to FIG. 1, in certain respects, UE 104 and base station 102 can be configured to support narrowband communications (198), including CQI measurement and reporting, over an unlicensed frequency spectrum. In addition, base station 102 can configure UE 104 for CQI reporting for each of a plurality of hop frequency groups, as described in this document. UE 104 can be configured to measure a CQI measurement for each of a plurality of hop frequency groups, as described in this document, where a set of hop frequencies is grouped within the plurality of groups and reports a CQI for each among the plurality of groups.
[0046] [0046] FIG. 2A is a diagram 200 illustrating an example of a LTE DL frame structure. FIG. 2B is a diagram 230 illustrating an example of channels within the DL frame structure in LTE. FIG. 2C is a diagram 250 illustrating an example of an UL LTE frame structure. FIG. 2D is a diagram 280 illustrating an example of channels within the UL frame structure in LTE. Other wireless communication technologies may have a different frame structure and / or different channels. In LTE, a frame (10 ms) can be divided into 10 subframes of equal size. Each subframe can include two consecutive time partitions. A resource grid can be used to represent the two time partitions, each time partition including one or more competing resource blocks (RBs) (also referred to as physical RBs). The resource grid is divided into several resource elements (REs). In LTE, for a normal cyclic prefix, an RB contains 12 consecutive subcarriers in the frequency domain and 7 consecutive symbols (for DL, OFDM symbols; for UL, SC-FDMA symbols) in the time domain, for a total of 84 REs. For an extended cyclic prefix, a RB contains 12 consecutive subcarriers in the frequency domain and 6 consecutive symbols in the time domain, for a total of 72 REs. The number of bits carried by each RE depends on the modulation scheme.
[0047] [0047] As illustrated in FIG. 2A, some of the REs carry DL (pilot) reference signals (DL-RS) for channel estimation in the UE. DL-RS can include cell-specific reference signals (CRS) (sometimes also referred to as common RS), UE-specific reference signals (UE-RS) and channel status information reference signals (CSI-RS ). FIG. 2A illustrates CRS for antenna ports 0, 1, 2 and 3 (indicated as R0, R1, R2 and R3, respectively), UE-RS for antenna port 5 (indicated as R5) and CSI-RS for the port antenna 15 (indicated as R). FIG. 2B illustrates an example of several channels within a DL subframe of a frame.
[0048] [0048] As illustrated in FIG. 2C, some of the REs carry demodulation reference signals (DM-RS) for eNB channel estimation. The UE can additionally transmit audible reference signals (SRS) at the last symbol of a subframe. The SRS can have a comb structure and a UE can transmit SRS on one of the combs. The SRS can be used by an eNB to estimate the quality of the channel to allow frequency-dependent programming on the UL. FIG. 2D illustrates an example of several channels within a UL subframe of a frame. A physical random access channel (PRACH) can be within one or more subframes within a frame based on the PRACH configuration. PRACH can include six consecutive RB pairs within a subframe. PRACH allows the UE to perform initial access to the system and obtain UL synchronization. A physical uplink control channel (PUCCH) can be located at the edges of the UL system bandwidth. The PUCCH carries uplink control information (UCI), such as programming request, a channel quality indicator (CQI), a pre-coding matrix indicator (PMI), a level indicator (RI), and feedback ACK / NACK HARQ. The PUSCH carries data and can additionally be used to carry a buffer status report (BSR), a power headroom report (PHR) and / or UCI.
[0049] [0049] FIG. 3 is a block diagram of an eNB 310 communicating with an UE 350 on an access network. In the DL, EPC 160 IP packets can be delivered to a 375 controller / processor. The 375 controller / processor implements layer 3 and layer 2 functionality. Layer 3 includes a radio resource control layer (RRC) and layer 2 includes a packet data convergence protocol layer (PDCP), a radio link control layer (RLC) and a medium access control layer (MAC). The 375 processor / controller provides RRC layer functionality associated with the dissemination of system information (for example, MIB, SIBs), RRC connection control (for example, RRC connection alert, RRC connection establishment, RRC connection modification and release of RRC connection), mobility of inter-radio access technology (RAT) and measurement configuration for the UE measurement report; PDCP layer functionality associated with header compression / decompression, security (encryption, decryption, integrity protection, integrity checking) and handover support functions; RLC layer functionality associated with transferring top layer data packet units (PDUs), error correction through ARQ, concatenation, segmentation and reassembly of RLC service data units (SDUs), re-segmentation of RLC data from PDUs, and RLC data reordering of PDUs; and MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing of MAC SDUs in transport blocks (TBs), demultiplexing of MAC SDUs from TBs, programming information reporting, error correction through HARQ , priority treatment and prioritization of logical channel.
[0050] [0050] The transmit processor (TX) 316 and the receive processor (RX) 370 implement the layer 1 functionality associated with various signal processing functions. Layer 1, which includes a physical layer (PHY), can include error detection in transport channels, encoding / decoding of error correction (FEC) of transport channels, interleaving, correspondence rate, mapping in physical channels, modulation / demodulation of physical channels, and MIMO antenna processing. The TX 316 processor handles mapping to signal constellations based on various modulation schemes (for example, binary phase shift (BPSK), quadrature phase shift (QPSK),
[0051] [0051] On UE 350, each RX 354 receiver receives a signal through its respective antenna 352. Each RX 354 receiver retrieves modulated information on an RF carrier and provides the information to the receiving processor (RX)
[0052] [0052] The 359 processor / controller can be associated with a 360 memory that stores program codes and data. 360 memory can be referred to as a computer-readable medium. At UL, the 359 processor / controller provides demultiplexing between logical and transport channels, packet reassembly, decryption, header decompression, and control signal processing to retrieve IP packets from EPC 160. The 359 processor / controller is also responsible for error detection using an ACK and / or NACK protocol to support HARQ operations.
[0053] [0053] Similar to the functionality described in connection with DL transmission via eNB 310, the processor / controller 359 provides the RRC layer functionality associated with the acquisition of system information (for example, MIB, SIBs), RRC connections and measurement report; the PDCP layer functionality associated with header compression / decompression, and security (encryption, decryption, integrity protection, integrity checking); the functionality of the RLC layer associated with the transfer of top layer PDUs, error correction through ARQ, concatenation, segmentation and reassembly of RLC SDUs, re-segmentation of RLC PDUs data and reordering of RLC PDUs data; and the MAC layer functionality associated with mapping between logical channels and transport channels, multiplexing MAC SDUs into TBs, demultiplexing MAC SDUs from TBs, scheduling information reporting, error correction through HARQ, handling priority and prioritization of logical channels.
[0054] [0054] Channel estimates derived through a 358 channel estimator from a reference or feedback signal transmitted via eNB 310 can be used by the TX 368 processor to select the appropriate coding and modulation schemes and to facilitate processing space. The spatial streams generated by the TX 368 processor can be supplied to different antennas 352 via separate TX 354 transmitters. Each TX 354 transmitter can modulate an RF carrier with a corresponding spatial flow for transmission.
[0055] [0055] The UL transmission is processed in the eNB 310 in a similar manner to that described in connection with the receiver function in the UE 350. Each receiver RX 318 receives a signal through its respective antenna 320. Each receiver RX 318 retrieves information modulated in an RF carrier and provides the information for an RX 370 processor.
[0056] [0056] The processor / controller 375 can be associated with a memory 376 that stores program codes and data. Memory 376 can be referred to as a computer-readable medium. At UL, the 375 processor / controller provides demultiplexing between transport and logical channels, packet reassembly, decryption, header decompression, control signal processing to retrieve IP packets from the UE 350. The processor / controller IP packets 375 can be provided to the EPC
[0057] [0057] Narrowband communications involve communication with a limited frequency bandwidth compared to the frequency bandwidth used in LTE communications. An example of narrowband communication is eMTC, which is limited to six RBs of system bandwidth. Another example of narrowband communication is NB-IoT communication, which is limited to a single system bandwidth RB, for example, 180 kHz.
[0058] [0058] NB-IoT communication and eMTC can reduce device complexity, enable battery life for several years and provide coverage to reach challenging locations, such as inside buildings. However, because the coverage provided by narrowband communications can include challenging locations (for example, a smart gas meter located in the basement of a building), there is a greater chance that one or more transmissions will not be received properly.
[0059] [0059] In eMTC LTE, CSI measurement is performed in the narrow bands containing a physical downlink control channel MTC (MPDCCH). MPDCCH is a type of PDCCH designed for low bandwidth operation targeting MTC devices and includes common information for narrow band operation (for example, common and EU-specific signaling, repetition level information).
[0060] [0060] In licensed spectrum LTE, a UE can be configured to monitor MPDCCH over a maximum of 4 narrow bands (each with six RBs of system bandwidth). Measurements of channel status information can be performed in narrow bands configured to have MPDCCH. For example, given a bandwidth of 20 MHZ, multiple narrow bands of 1 MHz (for example, 3-4 narrow bands can be configured). Each narrow band can have a width of six RBs, which is the standard narrow band for MTC.
[0061] [0061] Base station 102 can configure a hop pattern for the UE including multiple narrow bands. For example, a UE that has been configured by server base station 102 to monitor 2 narrow bands with MPDCCH, can monitor M subframes in the first narrow band and then jump to the second narrow band. If a UE is configured to monitor more than two narrow bands, the UE must be configured with a hop pattern through which the UE alternates in cycles. The values for M and the hop pattern can be configured by the base station or can be predetermined or a combination of them.
[0062] [0062] A UE can monitor and measure reference resources of channel state information (CSI) in the narrow bands configured to contain MPDCCH. If all narrow bands are configured to contain MPDCCH, then the UE will monitor the CSI on all bands. Alternatively, if a subset of narrow bands is configured to contain MPDCCH, then the UE will monitor the CSI in the subset of narrow bands. Typically, if a UE is configured to follow a jump pattern, the MPDCCH will also jump based on the jump pattern at all frequencies in the jump pattern.
[0063] [0063] When measuring CSI, the UE can monitor all RBs in the frequency domain (for example, all six RBs). In the time domain, the UE will monitor the last N subframes in each of the narrow bands in which the MPDCCH is monitored, where N is defined by:
[0064] [0064] N = ceil (csi-NumRepetitionCE / Number of narrow bands)
[0065] [0065] where csi-NumRepetitionCE is a value configured by base station 102. For example, if csi- NumRepetitionCE is set to 32, this is the number of subframes for which the UE will monitor the CSI and maintain a CSI record. If the UE is configured to monitor only 1 narrow band, then the UE will compute the CSI based on the last 32 subframes in the narrow band. If the UE is configured to monitor 2 narrow bands, then the UE will compute the CSI based on the last 16 subframes in each of the 2 narrow bands for which the UE monitors MPDCCH. If the UE is configured to monitor 4 narrow bands, then the UE will compute the CSI based on the last 8 subframes in each of the 4 narrow bands for which the UE monitors MPDCCH.
[0066] [0066] To report a channel quality indicator (CQI), there are two different modes: periodic and aperiodic. Periodic CQI feedback includes 1-0 mode and 1-1 mode. Aperiodic CQI feedback includes 2-0 mode.
[0067] [0067] Mode 1-0 is a broadband CQI report. Reports for mode 1-0 reflect the broadcast across all narrow ranges in the CSI reference feature. Therefore, if a UE is configured to monitor MPDCCH in 4 narrow bands, then the UE will use measurements of the reference signals in all 4 narrow bands to calculate a common CQI and report the common CQI to base station 102.
[0068] [0068] Similar to mode 1-0, mode 1-1 is also a broadband CQI. In mode 1-1, a UE reports a broadband CQI and a common pre-coding matrix (PMI) reflecting transmission across all narrow bands in the CSI reference resource. Thus, when reporting the CQI to mode 1-1, a UE will use reference signal measurements across all monitored narrow bands to compute a common CQI and report the common CQI together with a pre-coding matrix indicator (PMI) . The PMI will identify a pre-coding matrix for base station 102 to be used in communications with the UE.
[0069] [0069] The 2-0 mode is a mode that includes selected UE sub-band feedback. In this mode, the UE reports the broadband CQI and also reports a narrow band that the UE measured as having the best channel quality. Thus, if the UE is monitoring CSI in a narrow band, it can select a narrow band and report the CQI for that narrow band, along with an indication identifying the selected narrow band. Base station 102 can make use of the reported narrowband when programming the UE in the future. As in modes 1-0 and 1-1, broadband CQI in mode 2-0 is calculated based on all monitored narrow bands. When reporting the CQI of the selected narrow band, the value reflects the CQI measured only on the selected narrow band. This value is differentially encoded in relation to broadband CQI.
[0070] [0070] In contrast to licensed LTE, where the number of narrow bands is limited to 4 per UE, in eMTC unlicensed LTE (eMTC-U), a UE can be configured to monitor between 15 and 60 narrow bands in eMTC- U. Thus, as a 102 base station skips over 60 narrow bands, the UE served will also skip over the 60 narrow bands. In addition, in licensed LTE, the UE can spend a few ms per band and then jump to another band. However, as in the unlicensed spectrum it is necessary to carry out listening before speaking (LBT) procedures, the devices will try to use a longer transmission time. Therefore, depending on the frame structure employed, a base station 102 can spend 40 or 80 ms per narrow band before jumping. Due to this delay and the large number of narrowband, it may take several seconds before a base station 102 returns to a particular narrowband. Thus, a few seconds (for example, up to 5 seconds) can pass between successive measurements of a channel. In addition, given the nature of LBT, base station 102 may not transmit at some hop frequencies, so the reference subframe that is actually used to compute the CQI may have several cycles passed. This can occur because base station 102 does not transmit in a given cycle, because the UE does not decode the transmission from base station 102 or because the UE ignores a transmission. This leads the UE to report an earlier measurement of the narrow band that may have many seconds passed.
[0071] [0071] In the unlicensed spectrum, there may be a significant amount of interference in specific isolated portions of the frequency band. This is in contrast to licensed LTE, where all base stations 102 follow a random hop pattern across a wide spectrum and all occupants of the channel are known. For example, if a Wi-Fi node is implemented in the 2.40 to 2.42 GHz band and causes interference to a UE (for example, because it is close to the UE), then the measured CQI would be different for the hop frequencies 2.40 to 2.42 GHz bandwidth that overlap this part of the band versus others that do not overlap that band. However, if the UE is configured to report a broadband CQI, the broadband CQI will reflect an average that includes this high interference (low quality) measurement in a 2.40 to 2.42 GHz range, along with high quality measurement for the remaining narrow band. If the CQI at these collision frequencies is averaged over other jump frequencies, it can reduce system capacity due to the higher average interference across all monitored bands. Thus, broadband measurements that work on the licensed spectrum may not work on an unlicensed spectrum due to channel occupation in very specific regions of the unlicensed band.
[0072] [0072] In addition, the frequency jump is pseudo-random, therefore, the interference in the current jump may not be correlated with the interference in the next jump. That is, as the interference in the unlicensed band can be located in a single narrow band or in some narrow bands grouped, the CSI measured in the current narrow band may not be predictive of interference in another narrow band. This problem is partly due to the fact that the frequency jump must be pseudo-random due to regulation. For example, if a base station 102 is configured to use 60 narrow bands, the choice of jump between the bands will follow an effectively random pattern. While there may be some benefit in analyzing long-term statistics to find out how to program an UE, there is no reliable relationship between one jump or the next.
[0073] [0073] The aspects presented in this document include a method and an apparatus to operate in an unlicensed or shared radio spectrum band, offering opportunities for greater data transmission capacity and also addressing the unique challenges in wireless communication transmission in narrow band. Specifically, aspects include techniques for dividing a set of jump frequencies into several groups and reporting the CQI for each of these groups separately, for example, as if it were a regular broadband CQI.
[0074] [0074] FIG. 5 illustrates an exemplary aspect of a system 500 for wireless communication between a base station 502 (for example, 102, 310) and an UE 504 (for example, 104, 350) including CQI measurement and reporting. System 500 illustrates an example where a set of jump frequencies can be divided into several groups for CQI measurements and reports.
[0075] [0075] A set of jump frequencies can be divided into several groups. For example, a set of 15 jump frequencies can be divided into 3 groups of 5 frequencies. In another example, a set of 60 jump frequencies can be divided into 10 groups of 6 frequencies. The set of hop frequencies can be divided and grouped by the base station, for example. FIG. 5 illustrates, at step 505, that base station 502 can determine a configuration for CQI reporting, including dividing a set of hop frequencies into groups. This information can be provided to the UE through the base station, for example, at 510, base station 502 can transmit a configuration for CQI reporting to a UE 504. This configuration can be provided via RRC, SIBs or can be transmitted along with the CQI report request. The CQI can be reported through the UE for each of these groups separately, for example, as if the group were a regular broadband CQI. Such groupings and reports can reduce the reporting load on the UE and the resources used for uplink reporting on the base station. FIG. 4 illustrates a set of hop frequencies comprising 15 narrow bands (for example, NB1 - NB15). The jump pattern is illustrated as comprising a jump from NB5 at 402 to NB 8 at 404 to NB 11 at 406. The jump pattern continues to NB6 at 408, NB9 at 410, NB 12 at 412 and B15 at
[0076] [0076] In a first option, each group of frequencies can be discontinuous in the order of the set of hops, but can cover a contiguous subset of physical frequencies. FIG. 4 illustrates an example of grouping according to this first option, with Group 1 416 comprising NB 1-5, Group 2 418 comprising NB 6-10 and Group 3 420 comprising NB 11-15. The number of narrow bands within each group can be determined by the base station, groups of 5 narrow bands are just one example. This option can lead to the detection of interference in a portion of the frequency band, for example, interference from a WiFi node that covers only 20 MHz of the 80 MHz band. In one example, the CQI report can be performed on the last jump frequency defined in each group. In another example, the CQI report can occur after a visit to the Nth hop frequency in the set, where N is configured by the base station or specified in the specification. The base station can receive some early warning about the level of interference in the hop set and can use the early warning to configure the CQI report.
[0077] [0077] In a second option, each frequency group can be continuous in the order of set of hops, but it can be discontinuous in the physical frequency. For example, in FIG. 4, a first group according to this second option can comprise NB5, NB8 and NB11, a second group can comprise NB6, NB9 and NB12. A third group can comprise NB15 and the two next hop frequencies in the hop pattern, and so on. FIG. 12 illustrates the examples of jump patterns from FIG. 4 with continuous grouping in the jump order, but discontinuous in frequency. Groups of three narrow bands are just one example, and a different number of narrow bands can be used to group the narrow bands across the frequency set.
[0078] [0078] In 515, UE 504 measures and computes the CQI based on the reporting configuration transmitted via eNB 502. Based on the configuration, the UE can calculate and report separate CQI for the frequency groups in the frequency set.
[0079] [0079] In 520, the UE transmits the CQI report to eNB 502. Any of the various reporting configurations can be used by the UE to report the CQI. In a first option, a UE can report only one broadband CQI for each group of hop frequencies in the set of hop frequencies. In a second option, a UE can report a broadband CQI for each hop frequency group and can also report a sub-CQI
[0080] [0080] For any of these reporting options, the reporting configuration can be configured by the base station, for example, at 510. For example, an RRC or SIB can be used to provide the UE with the corresponding configuration from the base station.
[0081] [0081] At 525, base station 502 can process the CQI report and can program the UE at 530, for example, on its hop pattern based on the results of the UE reports.
[0082] [0082] A reference subframe can be used to compute a CQI for each group of hop frequencies. In License Assisted Access (LAA) and MulteFire (MF), the reference subframe for CQI is the last valid subframe before the reporting instance. If the base station does not transmit for a long time, it leads to the question that the CQI report will be based on very old base station transmissions. If there are no reference subframes available, for example, if the cell has just been activated etc., then a CQI 0 is reported.
[0083] [0083] The aspects presented in this document provide a technique for avoiding the inclusion of older CQI reference subframes in CQI reports. For example, when performing group CQI reports, for example, at 520, for groups of narrow bands within a set of frequencies, the UE may skip a frequency in which the LBT fails for the purpose of computing the broadband CQI within the corresponding group. By not including the frequency that failed to compute a CQI, the older CQI reference subframes do not contaminate the newly computed broadband CQI or the group subband CQI. If the base station does not transmit on any of the frequencies in the group, the UE can transmit CQI 0 or a standard CQI value.
[0084] [0084] If the base station is a broadband base station (eg base station with 4 narrow bands at 5 MHz), then a UE can opportunistically measure the CQI in the other narrow bands within the transmission of the base station in the subframes of downlink where the UE does not need to monitor PDCCH or receive PDSCH.
[0085] [0085] In a first example, when the UE does not receive PDCCH or receives a PDCCH that does not program PDSCH, the UE can monitor other narrow bands within the broadband eNB in the remaining downlink subframes that are not part of the search space of PDCCH.
[0086] [0086] In a second example, when the PDCCH search space is configured in several narrow bands within the broadband base station's transmission or when the PDSCH is programmed to span multiple narrow bands, the UE can measure CQI in space PDCCH search engine or in the PDSCH subframes, for example, if the transmission mode allows this measurement.
[0087] [0087] Another issue for the CQI report can occur when a UE wakes up from XRD or transitions from an RRC idle state. When the number of narrow bands per UE is small, for example, as in eMTC LTE, it may be easier to compute the broadband CQI using the transmissions in all narrow bands. However, for eMTC-U in the unlicensed spectrum, where the number of hop frequencies and, therefore, narrow bands, may be large, the UE may not even visit all frequencies before transmitting the CQI. For example, for small packet transmissions, the UE can visit only a very small number of frequencies during a DRX ON period. Similarly, the UE can visit only a small number of frequencies when it transitions from idle RRC to connected RRC.
[0088] [0088] The aspects presented in this document provide a solution for CQI reports in these situations.
[0089] [0089] In a first option, if a broadband CQI or group subband is configured, the UE may use only the reference subframes available in the hop frequencies visited by eNB after the current activation cycle to compute the CQI needed. Thus, the UE may not take into account the hop frequencies for which it has obsolete data or no data at all.
[0090] [0090] In a second option, the UE can perform an initialization based on the anchor channel. In this option, the UE can compute a broadband CQI in the anchor channel and a differential CQI can be reported for each hop frequency or group of hop frequencies. This can reduce the initial reporting requirements for the UE. Once the entire set of hop frequencies is complete, the
[0091] [0091] In a third option, the UE can only perform CQI reports based on anchor, periodic or aperiodic channels. For example, the UE can be configured to only perform CQI reports based on anchor, periodic or aperiodic channels.
[0092] [0092] In a fourth option, the UE can report CQI based on the first narrow band or the first narrow band / hop frequencies it monitors. The CQI at those initial narrowband / hop frequencies that the UE monitors can be based on a standard CQI configuration. In one example, the CQI reports in Msg 3 or 5 of an RRC connection installation procedure can be based on a standard CQI configuration. The base station can use this initial CQI to schedule transmissions until the first complete CQI is available from the UE.
[0093] [0093] FIG. 6 is a flow chart 600 of a wireless communication method, including measuring channel quality. The method can be carried out by a user device (for example, UE 104, 350, 504, the device 702, 702 '). Optional aspects are illustrated using a dashed line.
[0094] [0094] In 604, the UE measures a CQI measurement for each of a plurality of hop frequency groups, in which a set of hop frequencies is grouped into plurality groups. The set of hop frequencies can comprise frequencies in an unlicensed spectrum.
[0095] [0095] In one example, the hop frequencies within each group of the plurality of groups can be continuous in a standard hop order for the set of hop frequencies, as illustrated in the example of FIG. 12). The jump frequencies within each group of the plurality of groups can be discontinuous in physical frequency.
[0096] [0096] In another example, the jump frequencies within each group of the plurality of groups can encompass a contiguous subset of physical frequencies, as described in connection with the example of FIG. 4. The hop frequencies within each group of the plurality of groups can be discontinuous in a standard hop order for the set of hop frequencies.
[0097] [0097] The CQI measurement at 604 can be measured in a narrow band within a transmission band of a base station and outside a downlink control channel search space, when the user equipment does not receive a downlink control or receives a downlink control channel that does not schedule downlink data transmission.
[0098] [0098] The CQI measurement at 604 can be measured on a downink data channel when a downlink control channel search space is configured in multiple narrow bands within a base station's transmission band or when the channel downlink data is programmed to span multiple narrow bands.
[0099] [0099] In 608, the UE reports a CQI for each of the plurality of groups. In one example, CQI can be reported, for example, based on a last frequency in the hop pattern within each of the plurality of groups. In another example, a timing to report the CQI for each group can be based on a configured number of hops in the hop pattern within each of the plurality of groups.
[0100] [0100] In a first example, a broadband CQI can be reported for each of the plurality of groups. A broadband CQI for a specific group can comprise a CQI value based on all the hop frequencies measured for a given group in at least one group among the plurality of groups. In a second example, a broadband CQI can be reported for each of the plurality of groups, for example, a single CQI value based on all hop frequencies measured in the group and a subband CQI can be reported. reported for a subset of jump frequencies within each group among the plurality of groups. A subband CQI can comprise a CQI value for a subset of hop frequencies within a hop frequency group. In a third example, a broadband CQI can be reported for the set of hop frequencies and a group subband CQI can be reported for each group out of the plurality of groups. A broadband CQI for the hop frequency set can comprise a CQI value based on all the hop frequencies measured in the hop frequency set. A group subband CQI can comprise a CQI value based on all measured hop frequencies for a given group.
[0101] [0101] The UE can receive a configuration for CQI reporting from a base station, for example, in 602, where the UE reports the CQI for each of the plurality of groups based on the configuration for received CQI reporting from the base station.
[0102] [0102] As illustrated in 606, the UE can skip a frequency at which a listening procedure before speaking fails to compute a broadband CQI (for example, a CQI value based on all hop frequencies measured in the group ) within a corresponding group within the plurality of groups.
[0103] [0103] The UE can report the CQI for measurements taken at jump frequencies within a current wake-up cycle.
[0104] [0104] The UE can report a broadband CQI for an anchor channel and a differential CQI for each of the multiple groups, when the user equipment wakes up from a discontinuous reception mode or from an idle mode.
[0105] [0105] The UE can report a broadband CQI to an anchor channel when the user equipment wakes up from a discontinuous or idle reception mode.
[0106] [0106] The UE may report a partial CQI for an initial subset of hop frequencies when the user equipment wakes up from a discontinuous or idle reception mode and before reporting the CQI to each of the plurality of groups.
[0107] [0107] FIG. 7 is a conceptual data flow diagram 700 illustrating the flow of data between different media / components in an exemplary apparatus 702. The apparatus may be a UE (e.g., UE 104, 350, 504, 1050). The apparatus includes a receiving component 704 that receives downlink communication from the base station 750, a transmitting component 706 that transmits uplink communication, including CQI to the base station 750. The apparatus may include a measuring component of CQI 710 configured to measure a CQI measurement for each of a plurality of hop frequency groups, a CQI 712 reporting component configured to report a CQI for at least one of the plurality of groups, a configured CQI 708 configuration component to receive a configuration for CQI reporting from a base station and an LBT 714 component configured to skip a frequency at which a listening procedure before speaking fails to compute a broadband CQI within a corresponding group within the plurality groups.
[0108] [0108] The apparatus may include additional components that make each of the blocks of the algorithm in the flowcharts of FIGs. 5 and 6 mentioned above. As such, each block in the flowcharts of FIGs. 5 and 6 mentioned above can be made by a component and the apparatus can include one or more of those components. The components can be one or more hardware components configured specifically to carry out the declared processes / algorithm, implemented by a processor configured to carry out the declared processes / algorithms, stored in a computer-readable medium for implementation by a processor or some combination of the themselves.
[0109] [0109] FIG. 8 is a diagram 800 illustrating an example of hardware implementation for an apparatus 702 'employing a processing system 814. The processing system 814 can be implemented with a bus architecture, generally represented by the 824 bus. The 824 bus can include any number of interconnection buses and bridges, depending on the specific application of the 814 processing system and the general design restrictions. The 824 bus interconnects several circuits, including one or more processors and / or hardware components, represented by the 804 processor, the 704, 706, 708, 710, 712, 714 components and the 806 computer / memory readable medium. The 824 bus it can also interconnect several other circuits, such as timing sources, peripherals, voltage regulators and power management circuits, which are well known in the art and therefore will not be described further.
[0110] [0110] The processing system 814 can be coupled to a transceiver 810. Transceiver 810 is coupled to one or more antennas 820. Transceiver 810 provides a means of communication with several other devices through a transmission medium. The transceiver 810 receives a signal from one or more antennas 820, extracts information from the received signal and supplies the extracted information to the processing system 814, specifically the receiving component 704. In addition, the transceiver 810 receives information from from the processing system 814, specifically the transmission component 706 and, based on the information received, generates a signal to be applied to one or more antennas 820. The processing system 814 includes a processor 804 coupled to a computer-readable medium / memory 806. The processor 804 is responsible for general processing, including running the software stored in the computer-readable medium / memory 806. The software, when executed by the processor 804, causes the processing system 814 to perform the various functions described above for any particular device. The computer-readable medium / memory 806 can also be used to store data that is handled by the 804 processor when running the software. The processing system 814 additionally includes at least one of the components 704, 706, 708, 710, 712, 714. The components can be software components running on processor 804, resident / stored in the computer-readable medium / memory 806, one or more hardware components coupled to the 804 processor, or some combination thereof. The processing system 814 can be a component of the UE 350 and can include memory 360 and / or at least one among the TX 368 processor, the RX 356 processor and the 359 controller / processor.
[0111] [0111] In one configuration, the device 702/702 'for wireless communication includes a means to measure a CQI measurement for each of each and a plurality of jump frequency groups, a means for reporting a CQI for each of the plurality groups, means for receiving a configuration for CQI reporting from a base station and means for skipping a frequency at which a listening procedure before speaking fails to calculate a broadband CQI within a corresponding group among the plurality of groups. The aforementioned means can be one or more among the above-mentioned components of the apparatus 702 and / or the processing system 814 of the apparatus 702 'configured to perform the functions recited by the aforementioned means. As described above, the processing system 814 can include the TX 368 processor, the RX 356 processor and the 359 controller / processor. As such, in one configuration, the aforementioned means may be the TX 368 processor, the RX 356 processor and the controller / processor 359 configured to perform the functions recited by the means mentioned above.
[0112] [0112] FIG. 9 is a flow chart 900 of a wireless communication method, including measurement of channel quality. The method can be carried out by a base station (for example, base station 102, 310, 502, apparatus 1002, 1002 '). Optional aspects are illustrated using a dashed line.
[0113] [0113] In 904, the base station configures a UE (e.g. UE 104, 350, 504, apparatus 702, 702 ') for CQI reports for a plurality of hop frequency groups. As illustrated in 902, the base station can group the hop frequency set within the plurality of hop frequency groups before configuring the UE for the CQI report.
[0114] [0114] The set of hop frequencies can comprise frequencies in an unlicensed spectrum.
[0115] [0115] In one example, the hop frequencies within each group of the plurality of groups can be continuous in a hop pattern order for the set of hop frequencies. The jump frequencies within each group of the plurality of groups can be discontinuous in physical frequency.
[0116] [0116] In another example, the jump frequencies within each group of the plurality of groups may cover a contiguous subset of physical frequencies. The hop frequencies within each group of the plurality of groups can be discontinuous in a standard hop order for the set of hop frequencies.
[0117] [0117] In 906, the base station receives a CQI for at least one group of the plurality of hop frequency groups, in which a set of hop frequencies is grouped within the plurality of groups.
[0118] [0118] Reported CQI can be measured in a narrow band within a transmission band of a base station and outside a downlink control channel search space, when the user equipment does not receive a downlink control channel or receives a downlink control channel that does not program downlink transmission data.
[0119] [0119] Reported CQI can be measured on a downlink data channel when a downlink control channel search space is configured in several narrow bands within a base station's transmission band or when the data channel of downlink is programmed to cover several narrow bands.
[0120] [0120] In one aspect, the reported CQI can be based on a last frequency in the hop pattern within each of the plurality of groups. In another aspect, a timing to report the CQI for each group can be based on a configured number of hops in the hop pattern within each of the plurality of groups.
[0121] [0121] In a first example, the reported CQI may comprise a broadband CQI for each of the plurality of groups. For example, a broadband CQI for at least one group among the plurality of groups may comprise a CQI value based on all the measured hop frequencies of a given group in at least one group among the plurality of groups. In a second example, the reported CQI can comprise a broadband CQI, for example, a single CQI value based on all hop frequencies measured in the group, for each plurality of groups and a subband CQI can be reported for a subset of jump frequencies within each group among the plurality of groups. Thus, a subband CQI can comprise a CQI value for a subset of hop frequencies within a group among the plurality of hop frequency groups. In a third example, the reported CQI may comprise a broadband CQI for the set of hop frequencies and a subband CQI group may be reported for each group within the plurality of groups. A broadband CQI for the hop frequency set can comprise a CQI value based on all the hop frequencies measured in the hop frequency set. A subband CQI group can comprise a CQI value based on all measured hop frequencies for a given group.
[0122] [0122] The reported CQI can be based on the CQI for measurements made at jump frequencies within a current wake-up cycle.
[0123] [0123] The reported CQI may comprise a broadband CQI for an anchor channel and a differential CQI for each of the plurality of groups, for example, when the user equipment wakes up from a batch or idle reception mode . The broadband CQI for the anchor channel can comprise a CQI for the frequency range of the anchor channel.
[0124] [0124] The reported CQI may comprise a broadband CQI for an anchor channel, for example, when the user equipment wakes up from a discontinuous reception mode or from an idle mode.
[0125] [0125] The reported CQI may comprise a partial CQI for an initial subset of hop frequencies, for example, when the user equipment wakes up from a discontinuous or idle reception mode and until the user equipment can report a first full CQI .
[0126] [0126] FIG. 10 is a conceptual data flow diagram 1000 illustrating the data flow between different media / components in an exemplary apparatus 1002. The apparatus may be a base station (e.g., base station 102, 310, 502, 750). The apparatus includes a receiving component 1004 that receives uplink communication from at least one UE 1050, including channel quality indications, and a transmitting component 1006 that transmits downlink communication to the UE 1050. The apparatus may include a CQI configuration component 1008 configured to configure the UE 1050 for CQI reporting for a plurality of hop frequency groups and a CQI 1010 component configured to receive a CQI for at least one group among the plurality of hop frequency groups , wherein a set of hop frequencies is grouped within the plurality of groups, for example, as described in connection with FIGs. 5 and 9. The apparatus may include a grouping component 1012 configured to group the set of hop frequencies within the plurality of groups of hop frequencies.
[0127] [0127] The apparatus may include additional components that perform each of the algorithm blocks in the flowcharts of FIGs. 5 and 9 mentioned above. As such, each block in the flowcharts of FIGs. 5 and 9 mentioned above can be realized by a component and the apparatus can include one or more of those components. The components can be one or more hardware components configured specifically to carry out the declared processes / algorithm, implemented by a processor configured to carry out the declared processes / algorithms, stored in a computer-readable medium for implementation by a processor or some combination of the themselves.
[0128] [0128] FIG. 11 is a diagram 1100 illustrating an example of hardware implementation for an apparatus 1002 'employing a processing system 1114. The processing system 1114 can be implemented with a bus architecture, generally represented by the 1124 bus. The 1124 bus can include any number of interconnection buses and bridges, depending on the specific application of the 1114 processing system and the general design restrictions. The 1124 bus interconnects several circuits, including one or more processors and / or hardware components, represented by processor 1104, components 1004, 1006, 1008, 108, 1010, 1012 and the computer / memory readable medium
[0129] [0129] The processing system 1114 can be coupled to a transceiver 1110. Transceiver 1110 is coupled to one or more antennas 1120. Transceiver 1110 provides a means of communication with several other devices through a transmission medium. Transceiver 1110 receives a signal from one or more antennas 1120, extracts information from the received signal and supplies the extracted information to processing system 1114, specifically the receiving component 1004. In addition, transceiver 1110 receives information from the processing system 1114, specifically the transmission component 1006, and based on the information received, generates a signal to be applied to one or more antennas 1120. Processing system 1114 includes a processor 1104 coupled to a computer / memory readable medium 1106. Processor 1104 is responsible for general processing, including running the software stored in the computer / memory readable medium 1106. The software, when run by processor 1104, causes processing system 1114 to perform the various functions described above for any particular device. Computer-readable medium / memory 1106 can also be used to store data that is handled by processor 1104 when running the software. The processing system 1114 additionally includes at least one of the components 1004, 1006, 1008, 1010, 1012. The components can be software components running on processor 1104, resident / stored in the computer-readable medium / memory 1106, one or more hardware components attached to the 1104 processor or some combination thereof. Processing system 1114 may be a component of eNB 310 and may include memory 376 and / or at least one of the TX 316 processor, the RX 370 processor and the 375 controller / processor.
[0130] [0130] In one configuration, the device 1002/1002 'for wireless communication includes means for configuring user equipment for CQI reports for a plurality of hop frequency groups, means for receiving a CQI for each of a plurality of hop frequency groups, in which a set of hop frequencies is grouped within the plurality of groups and means for grouping the set of hop frequencies within the plurality of hop frequency groups. The aforementioned means can be one or more among the above-mentioned components of the apparatus 1002 and / or the processing system 1114 of the apparatus 1002 'configured to perform the functions recited by the aforementioned means. As described above, processing system 1114 may include processor TX 316, processor RX 370 and controller / processor 375. As such, in one configuration, the aforementioned means may be Processor TX 316, Processor RX 370 and the controller / processor 375 configured to perform the functions recited by the means mentioned above.
[0131] [0131] It is understood that the specific order or hierarchy of blocks in the processes / flowcharts described is an illustration of exemplary approaches. Based on the design preferences, it is understood that the specific order or hierarchy of blocks in the processes / flowcharts can be reorganized. In addition, some blocks can be combined or omitted. The accompanying method claims elements present from the various blocks in a sample order, and is not intended to be limited to the specific order or hierarchy presented.
[0132] [0132] The previous description is provided to allow anyone skilled in the art to practice the various aspects described in this document. Several changes to these aspects will become readily apparent to those skilled in the art, and the generic principles defined in this document can be applied to other aspects. Thus, the claims are not intended to be limited to the aspects shown in this document, but must be in accordance with the full scope consistent with the claims of the language, in which the reference to an element in the singular is not intended to mean "one and only one "unless specifically stated, but" one or more ". The word "exemplary" is used in this document to mean "to serve as an example, an instance or an illustration". Any aspect described in this document as "exemplary" is not necessarily to be interpreted as preferred or advantageous over other aspects.
Unless otherwise stated, the term "some" refers to one or more.
Combinations such as "at least one of A, B or C", "one or more of A, B or C", "at least one of A, B and C", "one or more of A, B and C" and "A, B, C, or any combination of these" includes any combination of A, B and / or C, and may include multiples of A, multiples of B, or multiples of C.
Specifically, combinations such as "at least one of A, B or C", "one or more of A, B or C", "at least one of A, B and C", "one or more of A, B and C, "and" A, B, C, or any combination of them "can be just A, just B, just C, A and B, A and C, B and C, or A and B and C, where any these combinations may contain one or more members or members of A, B or C.
All structural and functional equivalents to the elements of the various aspects described throughout this description that are known or that will later become known to those skilled in the art are expressly incorporated by reference in this document and are intended to be encompassed by the claims.
In addition, nothing disclosed in this document is intended to be dedicated to the public regardless of whether such a description is explicitly recited in the claims.
The words "module", "mechanism", "element", "device" and the like cannot be a substitute for the word "means". As such, no claimed element should be interpreted as a more functional means unless the element is expressly defined using the phrase "means for".

权利要求:
Claims (52)
[1]
1. Method, carried out on a user equipment (UE) to measure channel quality, comprising: measuring a measurement of channel quality indicator (CQI) for each of a plurality of jump frequency groups, in which one set of jump frequencies is grouped within the plurality of groups; and report a CQI to at least one of the plurality of groups.
[2]
2. Method according to claim 1, wherein the set of hop frequencies comprises frequencies in an unlicensed spectrum.
[3]
A method according to claim 1, wherein the hop frequencies within each group of the plurality of groups are continuous in a standard hop order for the set of hop frequencies.
[4]
4. Method according to claim 3, in which the jump frequencies within each group among the plurality of groups are discontinuous in physical frequency.
[5]
5. Method according to claim 1, in which reporting the CQI to at least one of the plurality of groups includes reporting a CQI value based on all the measured jump frequencies of a given group in at least one of the plurality of groups.
[6]
6. Method according to claim 1, further comprising: skipping a frequency at which a listening procedure before speaking fails to compute a broadband CQI within a corresponding group of the plurality of groups.
[7]
7. Method according to claim 1, wherein the CQI reported for each of the plurality of groups comprises an aperiodic CQI.
[8]
8. Method according to claim 1, further comprising: receiving a CQI reporting configuration from a base station, wherein the UE reports the CQI to each of the plurality of groups based on the reporting configuration of CQI received from the base station.
[9]
9. Method according to claim 1, wherein the hop frequencies within each group among the plurality of groups comprise a contiguous subset of physical frequencies.
[10]
10. Method according to claim 9, wherein the CQI is reported based on a last frequency in a hop pattern within each of the plurality of groups.
[11]
11. Method according to claim 9, in which a timing to report the CQI for each group is based on a configured number of hops in a jump pattern within each of the plurality of groups.
[12]
12. Method according to claim 1, wherein a broadband CQI is reported for the set of hop frequencies and a group subband CQI is reported for each group among the plurality of groups.
[13]
13. Method according to claim 1, wherein the CQI measurement is measured in a narrow band within a transmission band of a base station and outside a downlink control channel search space, when the UE it does not receive a downlink control channel or receives the downlink control channel that does not program downlink data transmission.
[14]
14. The method of claim 1, wherein the CQI measurement is measured on a downlink data channel when a downlink control channel search space is configured in multiple narrow bands within a transmission band. a base station or when the downlink data channel is programmed to span multiple narrow bands.
[15]
15. Method according to claim 1, in which the user equipment reports the CQI for measurements made at jump frequencies within a current wake-up cycle.
[16]
16. The method of claim 1, wherein the user equipment reports a broadband CQI to an anchoring channel when the user equipment wakes up from a batch or idle reception mode.
[17]
17. Method according to claim 1, wherein the user equipment reports a partial CQI for an initial subset of hop frequencies when the user equipment wakes up from a discontinuous or idle reception mode and before reporting the CQI for each of the plurality of groups.
[18]
18. Apparatus for measuring channel quality in User Equipment (UE), comprising: means for measuring a measurement of the channel quality indicator (CQI) for each of a plurality of hop frequency groups, in which one set of jump frequencies is grouped within the plurality of groups; and means for reporting a CQI to at least one of the plurality of groups.
[19]
19. Apparatus according to claim 18, further comprising: means for skipping a frequency at which a listening procedure before speaking fails to compute a broadband CQI within a corresponding group among the plurality of groups.
[20]
20. Apparatus according to claim 18, further comprising: means for receiving a CQI reporting configuration from a base station, wherein the UE reports the CQI to each of the plurality of groups based on the configuration of CQI report received from the base station.
[21]
21. Apparatus for measuring channel quality in user equipment (UE), comprising: a memory; and at least one processor coupled to the memory and configured to: measure a measurement of channel quality indicator (CQI) for each of a plurality of hop frequency groups, in which a set of hop frequencies is grouped within the plurality groups; and report a CQI to at least one of the plurality of groups.
[22]
22. Apparatus according to claim 21, wherein the set of hop frequencies comprises frequencies in an unlicensed spectrum.
[23]
23. Apparatus according to claim 21, wherein the hop frequencies within each group of the plurality of groups are continuous in a standard hop order for the set of hop frequencies.
[24]
Apparatus according to claim 23, wherein the hop frequencies within each group of the plurality of groups are discontinuous in physical frequency.
[25]
25. Apparatus according to claim 21, in which reporting the CQI to at least one of the plurality of groups includes reporting a CQI value based on all the measured hop frequencies of a given group in at least one of the plurality of groups.
[26]
26. Apparatus according to claim 21, wherein at least one processor is additionally configured to: skip a frequency at which a listening procedure before speaking fails to compute a broadband CQI within a corresponding group of the plurality of groups.
[27]
27. Apparatus according to claim 21, wherein at least one processor is additionally configured to: receive a CQI reporting configuration from a base station, in which the UE reports the CQI for each of the plurality of groups based on the CQI report configuration received from the base station.
[28]
28. Computer readable medium storing computer executable code to measure channel quality on User Equipment (UE), comprising code to: measure a channel quality indicator (CQI) measurement for each of a plurality of groups skip frequencies, in which a set of skip frequencies is grouped within the plurality of groups; and report a CQI for each of the various groups.
[29]
29. A computer-readable medium according to claim 28, further comprising code for: skipping a frequency at which a listening procedure before speaking fails to compute a broadband CQI within a corresponding group of the plurality of groups.
[30]
30. Computer-readable medium according to claim 28, further comprising code for: receiving a CQI reporting configuration from a base station, in which the UE reports the CQI to each of the plurality of groups based on in the CQI reporting configuration received from the base station.
[31]
31. Method performed on a base station to measure channel quality, comprising: configuring a user equipment (UE) for channel quality indicator (CQI) reporting for a plurality of hop frequency groups; and receiving a CQI for at least one group among the plurality of hop frequency groups, in which a set of hop frequencies is grouped within the plurality of groups.
[32]
32. The method of claim 31, further comprising: grouping the set of hop frequencies within the plurality of hop frequency groups before configuring the UE for the CQI report.
[33]
33. The method of claim 31, wherein the set of hop frequencies comprises frequencies in an unlicensed spectrum.
[34]
34. The method of claim 31, wherein the jumping frequencies within each of the plurality of groups are continuous in a standard jumping order for the set of jumping frequencies.
[35]
35. The method of claim 34, wherein the jump frequencies within each of the plurality of groups are discontinuous in physical frequency.
[36]
36. The method of claim 31, wherein the CQI for at least one group within the plurality of groups comprises a CQI value based on all the measured hop frequencies of a given group in at least one group within the group. plurality of groups.
[37]
37. The method of claim 36, wherein the CQI for at least one group among the plurality of groups further comprises a CQI value for a subset of hop frequencies within the at least one group.
[38]
38. The method of claim 31, wherein the CQI reported for each group among the plurality of groups comprises an aperiodic CQI.
[39]
39. The method of claim 31, wherein the jumping frequencies within each group among the plurality of groups encompass a contiguous subset of physical frequencies.
[40]
40. The method of claim 39, wherein the jumping frequencies within each group among the plurality of groups are discontinuous in a standard jumping order for the set of jumping frequencies.
[41]
41. The method of claim 40, wherein a timing for reporting the CQI for each group is based on a configured number of hops in the jump pattern within each group among the plurality of groups.
[42]
42. Apparatus for wireless communication at a base station, comprising: means for configuring user equipment (UE) for channel quality indicator (CQI) reporting for a plurality of hop frequency groups; and means for receiving a CQI for at least one group among the plurality of hop frequency groups, wherein a set of hop frequencies is grouped within plurality of groups.
[43]
43. The apparatus of claim 42, further comprising: means for grouping the set of hop frequencies within the plurality of hop frequency groups before configuring the UE for the CQI report.
[44]
44. Apparatus for wireless communication at a base station, comprising: a memory; and at least one processor coupled to the memory and configured to: configure a user equipment (UE) for channel quality indicator (CQI) reporting for a plurality of hop frequency groups; and receiving a CQI for at least one group among the plurality of hop frequency groups, in which a set of hop frequencies is grouped within the plurality of groups.
[45]
45. Apparatus according to claim 44, wherein the at least one processor is additionally configured to: group the hop frequency set within the plurality of hop frequency groups before configuring the UE for the CQI report.
[46]
46. Apparatus according to claim 44, wherein the set of hop frequencies comprises frequencies in an unlicensed spectrum.
[47]
47. Apparatus according to claim 44, wherein the jump frequencies within each of the plurality of groups are continuous in a standard jump order for the set of jump frequencies.
[48]
48. Apparatus according to claim 47, wherein the jump frequencies within each of the plurality of groups are discontinuous in physical frequency.
[49]
49. Apparatus according to claim 44, wherein the CQI for at least one group within the plurality of groups comprises a CQI value based on all the measured hop frequencies of a given group in at least one group within the plurality of groups.
[50]
50. Apparatus according to claim 49, wherein the CQI for at least one group among the plurality of groups further comprises a CQI value for a subset of hop frequencies within at least one group.
[51]
51. Computer readable medium storing computer executable code, comprising code for: configuring user equipment (UE) for channel quality indicator (CQI) reporting for a plurality of hop frequency groups, and receiving a CQI for at least one group among the plurality of hop frequency groups, in which a set of hop frequencies is grouped within the plurality of groups.
[52]
52. Computer-readable medium according to claim 51, further comprising code for: grouping the set of hop frequencies within the plurality of hop frequency groups before configuring the UE for the CQI report.

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同族专利:

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公开号 | 公开日

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SG11201911103VA|2020-01-30|

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WO2019013909A1|2019-01-17|

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EP3652978A1|2020-05-20|

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CA3065515A1|2019-01-17|

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AU2018299782A1|2019-12-19|

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法律状态:
2021-11-03| B350| Update of information on the portal [chapter 15.35 patent gazette]|

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