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    • 专利摘要:
    A method of operating a wireless communication device or radio access node comprises addressing multiple subcarrier system resources using at least one of the multiple different numerologies available on a single carrier, where the multiple different numerologies comprise a first numerology having resource blocks with a first bandwidth and first subcarrier spacing, <, fl, and a second numerology having RBs with a second bandwidth and second subcarrier spacing, <, f2, which is different from <çfl , and where the first numerology is aligned in the frequency domain relation for a frequency reference, Fref, according to m * ó fl + Fref and the second numerology is aligned in the frequency domain in relation to the frequency reference, Fref , according to n * ó f2 + Fref, where men are integers. The method further comprises transmitting and / or receiving information within the single carrier according to at least one of multiple different numerologies.
    公开号:BR112018073203B1
    申请号:R112018073203-6
    申请日:2017-03-01
    公开日:2020-10-13
    发明作者:Karl Werner；Ning He；Robert Baldemair
    申请人:Telefonaktiebolaget Lm Ericsson (Publ)；
    IPC主号:
    专利说明:

    Cross Reference for Related Orders
    [001] This application claims priority for U.S. Provisional Patent Application No. 62 / 336,302, filed on May 13, 2016, the disclosure of which is incorporated herein by reference in its entirety. Technical Field
    [002] The matter described generally refers to telecommunications. Certain modalities refer more particularly to the operation of multiple subcarrier systems using multiple numerologies. Foundations
    [003] One of the pillars of the fifth generation mobile networks (5G) is to expand the services offered by the network beyond mobile broadband (MBB). New use cases may come with new requirements. At the same time, 5G must also support a wide range of frequencies and be flexible when it comes to deployment options. summary
    [004] In some embodiments of the subject described, a method of operating a wireless communication device or radio access node comprises addressing multiple subcarrier system resources using at least one of multiple different numerologies available on a single carrier, wherein the multiple different numerologies comprise a first numerology having resource blocks (RBs) with a first bandwidth and a first subcarrier spacing, Δfl, and a second numerology having RBs with a second bandwidth and a second subcarrier spacing , Δf2, which is different from Δfl, and where the first numerology is aligned in the frequency domain in relation to a frequency reference, Fref, according to m * Δfl + Fref and the second numerology is aligned in the frequency domain in relation to to the frequency reference, Fref, according to n * Δf2 + Fref, where men are integers. The method further comprises transmitting and / or receiving information within the single carrier according to at least one of multiple different numerologies.
    [005] In certain related modalities, RB subcarriers allocated from the first numerology are separated from RB subcarriers allocated from the second numerology by a frequency gap having a size that is a function of Δfl or Δf2.
    [006] In certain related modalities, the first subcarrier spacing, Δfl, is related to the second subcarrier spacing Δf2 by an integer scale factor N such that Δf2 = N * Δfl.
    [007] In certain related modalities, Δfl = 15 kHz and Δf2 = 60 kHz. The single carrier can be, for example, a 20 MHz carrier or a 10 MHz carrier.
    [008] In certain related modalities, the system of multiple subcarriers is an orthogonal frequency division multiplexing (OFDM) system. The multiple subcarrier system can also be a pre-coded multiple subcarrier system, and the pre-coded multiple subcarrier system can be a Discrete Fourier Transform (DFT) spreading (DFTS-OFDM) system.
    [009] In certain related modalities, at least one of the multiple different numerologies comprises a plurality of different numerologies.
    [0010] In certain related modalities, the method further comprises transmitting or receiving first and second integers B and D indicating an initial frequency and bandwidth of a first numerology among the multiple different numerologies, where the initial frequency is defined according to B * Kl * Δf, and the bandwidth of the first numerology is defined according to D * Kl * Δf, where Kl indicates a bandwidth of a smaller addressable unit of the first numerology, expressed in units of a smaller spacing of single carrier numerology subcarrier, and where Δf denotes the smallest subcarrier spacing. In this context, the bandwidth of a numerology refers to the frequency range to which numerology applies.
    [0011] In certain related modalities, the method further comprises transmitting or receiving the third and fourth integers A and C indicating an initial frequency and bandwidth of a second numerology among the multiple different numerologies, where the initial frequency of the second numerology is defined according to A * K2 * Δf, and the bandwidth of the second numerology is defined according to C * K2 * Δf, where K2 denotes a bandwidth of a smaller addressable unit of the second numerology, expressed in units of smaller spacing of single carrier numerology subcarriers.
    [0012] In certain related modalities, the first to fourth integers are transmitted in the downlink control (DCI) information. This DCI can be a single instance of the DCI or multiple instances. For example, DCI could include a first instance containing integers A and C, and a second instance including integers B and D.
    [0013] In certain related modalities, the method further comprises transmitting or receiving a bitmap (bitmap) indicating an initial frequency and bandwidth of each of at least one of the multiple different numerologies.
    [0014] In some embodiments of the subject described, an apparatus (for example, eNB or UE) comprises processing and memory circuits collectively configured to address system resources of multiple subcarriers using at least one of multiple different numerologies available on a single carrier, wherein the multiple different numerologies comprise a first numerology having resource blocks (RBs) with a first bandwidth and a first subcarrier spacing, Δfl, and a second numerology having RBs with a second bandwidth and a second subcarrier spacing , Δf2, which is different from Δfl, and where the first numerology is aligned in the frequency domain in relation to a frequency reference, Fref, according to m * Δfl + Fref and the second numerology is aligned in the frequency domain in Regarding the frequency reference, Fref, according to n * Δf2 + Fref, men are integers. The apparatus further comprises at least one transmitter and / or receiver configured to transmit and / or receive information within the single carrier according to at least one of multiple different numerologies.
    [0015] In certain related modalities, RB subcarriers allocated from the first numerology are separated from RB subcarriers allocated from the second numerology by a frequency gap having a size that is a function of Δfl or Δf2.
    [0016] In certain related modalities, the first subcarrier spacing, Δfl, is related to the second subcarrier spacing Δf2 by an integer scale factor N such that Δf2 = N * Δfl.
    [0017] In certain related modalities, Δfl = 15kHz and Δf2 = 60kHz. The single carrier can be, for example, a 20MHz carrier or a 10MHz carrier.
    [0018] In certain related modalities, the system of multiple subcarriers is an orthogonal frequency division multiplexing system (OFDM). The multiple subcarrier system can also be a pre-coded multiple subcarrier system, and the pre-coded multiple subcarrier system can be a Discrete Fourier Transform (DFT) spreading (DFTS-OFDM) system.
    [0019] In certain related modalities, at least one of the multiple different numerologies comprises a plurality of different numerologies.
    [0020] In certain related modalities, at least one transmitter and / or receiver are further configured to transmit and / or receive first and second integers B and D indicating an initial frequency and bandwidth of a first numerology among multiple different numerologies, where the initial frequency is defined according to B * Kl * Δf, and the bandwidth of the first numerology is defined according to D * Kl * Δf, where Kl denotes a bandwidth of a smaller addressable unit of the first numerology, expressed in units of lesser spacing of single carrier numerology subcarriers, and where Δf denotes the smallest spacing of subcarriers.
    [0021] In certain related modalities, at least one transmitter and / or receiver are still configured to transmit and / or receive third and fourth integers A and C indicating an initial frequency and bandwidth of a second numerology among multiple different numerologies, in that the initial frequency of the second numerology is defined according to A * K2 * Δf, and the bandwidth of the second numerology is defined according to C * Kl * Δf, where K2 denotes a bandwidth of a smaller addressable unit of the second numerology, expressed in units of the smallest spacing of single carrier's numerology subcarrier.
    [0022] In certain related modalities, the first to fourth integers are transmitted in the downlink control (DCI) information.
    [0023] In certain related modalities, the at least one transmitter and / or receiver are further configured to transmit or receive a bitmap indicating an initial frequency and bandwidth of each of at least one of the multiple different numerologies.
    [0024] In some embodiments of the subject described, an apparatus comprises an addressing module configured to address system resources of multiple subcarriers using at least one of the different numerologies available on a single carrier, in which the multiple different numerologies comprise a first numerology having resource blocks (RBs) with a first bandwidth and first subcarrier spacing, Δfl, and a second numerology having RBs with a second bandwidth and second subcarrier spacing, Δf2, which is different from Δfl, and in that the first numerology is aligned in the frequency domain in relation to a frequency reference, Fref, according to m * Δfl + Fref and the second numerology is aligned in the frequency domain in relation to the frequency reference, Fref, according to n * Δf2 + Fref, where men are integers. The apparatus further comprises a transmission and / or reception module configured to transmit and / or receive information within the single carrier according to at least one of the multiple different numerologies.
    [0025] In certain related modalities, the RBs subcarriers allocated from the first numerology are separated from the RBs subcarriers allocated from the second numerology by a frequency gap having a size that is a function of Δfl or Δf2.
    [0026] In certain related modalities, the first subcarrier spacing, Δfl, is related to the second subcarrier spacing Δf2 by an integer scale factor N such that Δf2 = N * Δfl.
    [0027] In certain related modalities, Δfl = 15kHz and Δf2 = 60kHz. The single carrier can be, for example, a 20 MHz carrier or a 10 MHz carrier.
    [0028] In certain related modalities, the system of multiple subcarriers is an orthogonal frequency division multiplexing (OFDM) system. The multiple subcarrier system can also be a pre-coded multiple subcarrier system and the pre-coded multiple subcarrier system can be a Discrete Fourier Transform (DFT) spreading (DFTS-OFDM) system.
    [0029] In certain related modalities, at least one of the multiple different numerologies comprises a plurality of different numerologies.
    [0030] In certain related modalities, the transmission and / or reception module is further configured to transmit and / or receive first and second integers B and D indicating an initial frequency and bandwidth of a first numerology among multiple different numerologies, in that the initial frequency is defined according to B * Kl * Δf, and the bandwidth of the first numerology is defined according to D * Kl * Δf, where Kl denotes a bandwidth of a smaller addressable unit of the first numerology , expressed in units of smaller spacing of single carrier numerology subcarriers, and in which Δf denotes the smallest spacing of subcarriers.
    [0031] In certain related modalities, the transmission and / or reception module is further configured to transmit and / or receive the third and fourth integers A and C indicating an initial frequency and bandwidth of a second numerology among multiple different numerologies, where the initial frequency of the second numerology is defined according to A * K2 * Δf, and the bandwidth of the second numerology is defined according to C * Kl * Δf, where K2 denotes a bandwidth of a smaller unit addressable of the second numerology, expressed in units of the smallest spacing of the single carrier's numerology subcarrier.
    [0032] In certain related modalities, the first to fourth integers are transmitted in the downlink control (DCI) information.
    [0033] In certain related modalities, the transmission and / or reception module is further configured to transmit or receive a bitmap indicating an initial frequency and bandwidth of at least one of the multiple different numerologies. Brief Description of Drawings
    [0034] The drawings illustrate selected modalities of the described subject. In the drawings, similar reference labels denote similar features.
    [0035] Figure (FIG.) 1 illustrates two signals with different numerologies separated in frequency according to a modality of the subject described.
    [0036] Figure 2 illustrates the resource block alignment (RB) and the frequency shift (scaling) being different for different numerologies according to a modality of the described subject.
    [0037] Figure 3 illustrates how an initial allocation and bandwidth can be determined for two different numerologies defined in relation to a common frequency reference, based on the integers A and C and B and D, respectively, according to a modality of the subject described.
    [0038] Figure 4 illustrates how RBs can be allocated to create a guard band between two numerologies on the same carrier according to a modality of the subject described.
    [0039] Figure 5 illustrates an example of the guard band of Figure 4 in additional detail according to an embodiment of the subject described.
    [0040] Figure 6 illustrates another example of the guard band of Figure 4 in additional detail according to an embodiment of the subject described.
    [0041] Figure 7 illustrates multiplexing in the frequency domain of different numerologies according to a modality of the subject described.
    [0042] Figure 8 shows two sub-bands with different numerologies according to a modality of the subject described.
    [0043] Figure 9 illustrates a narrow band subcarrier inserted as guard between the first and second numerologies 1 and 2 according to a modality of the subject described.
    [0044] Figure 10 illustrates four narrowband subcarriers inserted as guard between numerology 1 and 2 according to a modality of the subject described.
    [0045] Figure 11 illustrates eight narrowband subcarriers inserted as guard between numerology 1 and 2 according to a modality of the subject described.
    [0046] Figure 12 illustrates the communication system according to a modality of the subject described.
    [0047] Figure 13 A illustrates a wireless communication device according to a modality of the subject described.
    [0048] Figure 13 B illustrates a wireless communication device according to another modality of the described subject.
    [0049] Figure 14 A illustrates a radio access node according to a modality of the subject described.
    [0050] Figure 14 B illustrates a radio access node according to another modality of the described subject.
    [0051] Figure 15 illustrates a radio access node according to yet another modality of the subject described.
    [0052] Figure 16 is a flowchart illustrating a method of operating a wireless communication device or a radio access node according to a modality of the subject described. Detailed Description
    [0053] The following description presents several modalities of the subject described. These modalities are presented as teaching examples and should not be interpreted as limiting the scope of the subject described. For example, certain details of the described modalities can be modified, omitted or expanded without departing from the scope of the described subject.
    [0054] In some modalities, the physical resources of a carrier are allocated and / or addressed using multiple numerologies, each corresponding to subcarriers located in positions that are defined in relation to a common frequency reference. In this context, the term "numerology" generally refers to the configuration of physical resources in a system of multiple subcarriers, such as an OFDM system. Such a configuration can include, for example, subcarrier spacing, symbol duration, cyclic prefix, resource block size, etc. As an example, the physical resources of a 10MHz or 20MHz carrier can be addressed and / or allocated using a first numerology having a 15kHz subcarrier spacing and a second numerology having a 60kHz subcarrier spacing, with the subcarriers for each of the located numerologies in positions that are defined in relation to the same frequency reference. In certain related modalities, signaling is provided to configure and / or communicate addressing and / or allocation between different devices.
    [0055] In the description that follows, the frequency reference, which is common for all numerologies, will be denoted by "Fref". The Fref frequency reference can be derived from (related to) eg EARFCN / UARFCN / NX-ARFCN frequency raster and can be retrieved by a node using a synchronization signal (such as PSS / SSS in LTE or SSI, MRS, BRS to NX).
    [0056] In certain modalities, the frequency alignment of numerologies is staggered so that resource blocks (RBS) of a first numerology start at (for example, possibly defined in the center of the first RB subcarrier) y * Nl * Δfl + Fref, and RBs of a second numerology start at z * N2 * Δf2 + Fref, where "y" and "z" are integers and Δfl and Δf2 are the respective subcarrier spacing of the first and second numerologies.
    [0057] In certain modalities, the RB sizes are selected so that N2 = N1, or more generally, so that (N2 * X) / N1 is an integer if Δf2 is related to Δfl as Δf2 = XΔfl. In addition, the allocation information signaling must map to a set of RBs in the numerology to which the allocation information refers.
    [0058] In certain embodiments, the RB bandwidth of the second numerology is X * Nl * Δfl. Or, differently, the bandwidth of an RB in the second numerology is equal to X times the bandwidth of an RB in the first numerology.
    [0059] When addressing an allocation, signaling can use a coarser grid than the RB grid, and the modalities are presented here to allow control of guard bands between numerologies with the granularity of the numerology RB grid with the lowest Δf.
    [0060] Certain modalities allow aligned subcarrier positions - and subcarriers of all numerologies end up in their natural grid related to the same frequency reference. This can simplify implementation and signaling.
    [0061] Allocations in different numerologies in neighboring nodes (or in different beams transmitted from the same node) can be aligned in frequency. This creates a predictable interference pattern and also enables interference cancellation techniques. In addition, it allows adjacent allocations in different cells without guard bands.
    [0062] As each RB is aligned in its natural grid, the RBs of the same numerology can be aligned through the cells. This enables orthogonal reference signals across the cells.
    [0063] Certain modalities also allow the creation of guard bands between numerologies on the same carrier without explicit signaling other than the normal allocation address. This allows the combination of numerologies to be transparent to terminals on the same carrier (in case a given terminal is scaled in only one numerology). It also allows guard band sizes that can be adapted to a specific scenario. Less guard band may, for example, be needed in a scenario with a low signal-to-noise ratio (SNR) compared to a scenario when the SNR is high.
    [0064] The described modalities were developed taking into account several observations made by the inventors, including the following.
    [0065] Some services require a shorter transmission time interval (TTI) compared to LTE in order to reduce latency. In an OFDM system, shorter TTIs can be performed by changing the subcarrier spacing. Other services may need to operate under relaxed synchronization requirements or support very high robustness to delay spreading, and this can be done by extending the cyclic prefix in a system operating with a cyclic prefix (as predicted for NX). These are just examples of possible requirements.
    [0066] The choice of parameters such as subcarrier spacing and cyclic prefix lengths is an exchange between conflicting objectives. This points to the need for 5G radio access technologies (RATs) to support several variants of transmission parameters, commonly called numerologies. Such transmission parameters can be the symbol duration (which is directly related to the subcarrier spacing in an OFDM system), or guard interval or cyclic prefix duration.
    [0067] Furthermore, it is beneficial to be able to support several services in the same frequency band - the multiple numerologies may or may not be operated on the same node. This allows for dynamic allocation of resources (bandwidth, for example) between different services and for efficient implementation and deployment. Therefore, in some cases, it is necessary to use more than one numerology simultaneously in the same band (we use the term "band" to denote a carrier or a set of carriers served by the network).
    [0068] An MBB terminal can, for example, be served with a 15 kHz subcarrier spacing. A typical cyclic prefix is less than 5 ps and constitutes a header less than 10%. Another device, for example, a machine-type communication device (MTC) that requires very low latency, can be served with a subcarrier spacing of either 60 kHz (or 75 kHz). To correspond to the same deployment of the MBB terminal, a similar long guard interval is required. A guard interval can be a cyclic prefix, a known word, or a true guard interval comprising zero value samples. Next, we use the term guard interval to refer to any of them.
    [0069] The duration of an OFDM symbol is the inverse of the subcarrier spacing, that is, 1 / Δf, that is, an OFDM symbol with wide subcarriers is less than an OFDM symbol with narrow subcarriers. For example, the symbol duration of an OFDM symbol with Δfl = 15 kHz is 1 / Δfl = 67 ps and with Δf2 = 60 kHz the symbol duration is 1 / Δf2 = 17 ps. A guard interval of 4.7 ps constitutes a header of 5% and 22% for OFDM symbols with wide subcarriers of Δfl = 15 kHz and Δf2 = 60 kHz, respectively. The amount of resources (subcarriers) reserved for the MTC service must, therefore, be adapted to the necessary amount due to the large header.
    [0070] Another use case could be the mixture of Δf2 = 15 kHz and Δfl = 3.75 kHz (that is, narrower band numerology) for another type of MTC service. While the cyclic prefix header for this numerology is smaller than for ΔF2 = 15 kHz, the subcarrier bandwidth is very narrow and supports only terminals moving slowly due to the Doppler robustness. Therefore, the amount of resources (subcarriers) reserved with Δfl = 3.75 kHz must be adapted again to the required needs. A reasonable assumption for NX / NR is that the supported numerologies are related to each other by integer scale factors: Δf2 = X Δfl with Δf2 and Δfl the wide and narrow subcarrier spacing, respectively.
    [0071] The different numerologies (for example, bandwidths of OFDM subcarriers) are not orthogonal to each other, that is, a subcarrier with the subcarrier bandwidth Δfl interferes with a Δf2 bandwidth subcarrier or two OFDM numerologies with the same subcarrier spacing, but different cyclic prefixes (CPs) are also interfering with each other. In filtered or windowed OFDM, signal processing is introduced to suppress interference between different numerologies. Usually, a guard band also needs to be inserted between numerologies.
    [0072] In any communication system, resources need to be addressed or indexed. A typical example is when staggering a downlink transmission and signaling which resources are to be used in a control channel, or signaling an uplink concession, etc. In general, addressing or indexing occurs when a set of resources is identified according to an addressing scheme, such as a scheme defined by or limited by a first and / or second numerology as discussed above.
    [0073] A smaller fundamental unit in the frequency domain can be a single subcarrier. There are several reasons for having a smaller addressable unit (or, alternatively expressed, a greater granularity in resource assignments, or resource grid), which include: • signaling header - the number of bits required to address a resource increases when the smallest addressable unit size decreases, and • processing aspects - processing performance can be improved when parameters can be considered constant over a longer interval - a typical example is interference (inter-cell or intra-cell), and also • aspects implementation.
    [0074] The existence of a very small addressable unit limits the flexibility in a system. For example, the smallest allowable allocation should not become too large.
    [0075] In LTE, the smallest addressable unit in the frequency domain is typically a single physical resource block (PRB), which is 12 subcarriers wide. In some cases, the granularity is even greater (a group of resource blocks is up to 48 subcarriers when allocations are signaled using a bitmap).
    [0076] For simplicity, this description uses the label "RB" to indicate the smallest addressable unit; uses the label "NI" to indicate the number of subcarriers per RB for numerology 1; and uses the label "N2" to indicate the number of subcarriers per RB for numerology 2. The use of these labels does not necessarily limit the smallest addressable unit to a resource block, nor does it limit the number of numerologies to two.
    [0077] From the above reasoning, it is evident that selecting the size of RB or, alternatively, the granularity of the resource grid, is an exchange and that the same smaller addressable unit in terms of absolute frequency may be different for different numerologies. At the same time, the smallest addressable units of the numerologies that are mixed in a carrier must allow the creation of the necessary guard band, as discussed above. It is also desirable that resource allocation schemes of different numerologies are compatible, in order to meet the signal processing aspects described above, and to be able to share resources efficiently.
    [0078] If the smallest addressable unit in absolute frequency is not selected correctly for all numerologies operating on a carrier, then some numerologies (with greater Δf subcarrier spacing) can be allocated with an offset relative to its natural subcarrier grid (in that subcarriers are modulated in integer multiples of the subcarrier spacing in relation to a frequency reference). This is not desirable from an implementation point of view.
    [0079] If the resource grids are not correctly aligned between numerologies, interference levels may fluctuate more than necessary in an allocation. For example, it may not be possible for allocations in two neighboring cells to occupy adjacent, non-overlapping resources, without creating a guard interval. And in case the overlap is actually desired it may not be perfect - leading to fluctuation in the interference environment through an allocation.
    [0080] Furthermore, if resource addressing is not properly designed, taking into account multiple numerologies, it may not be possible to allocate appropriate guard bands between numerologies in a mixed numerology system - they may need to be excessively large, which will lead to waste of resources. In addition, multiple numerologies must be related to a common frequency reference.
    [0081] In light of the considerations above and other considerations, the concepts (1) - (4) below are presented for numerology subcarriers and RB grids operating on the same carrier. It will be assumed, without loss of generality, that the subcarrier spacing Δf2 and Δfl are related by Δf2> = Δfl. It will also be assumed that only two numerologies are used, but the concepts described could easily be applied to any number of numerologies. (1) In a system that applies mixed numerology, a frequency gap is inserted between numerology 1 and numerology 2 so that the numerology 2 subcarriers are in their natural subcarrier grid (n * Δf2 + Fref, n any integer). The numerology 1 subcarriers are in its natural subcarrier grid (n * Δfl + Fref). This is illustrated in Figure 2. In Figure 2, shaded triangles illustrate the main lobes of the subcarriers in the two numerologies. Notably, the drawing in Figure 2 is schematic and, in practice, subcarriers are slow decay signal functions with infinite support. (2) Concept (1), and, in addition, numerology 2 RBs start at the grid where numerology 1 RBs begin. The start of an RB could be defined through its first subcarrier as an example; this example is illustrated in Figure 2. (3) Concept (2) above, and additionally RB grid of numerology 1 is y * Nl * Δfl + Fref. (NI is the size of RB of numerology 1, y integer) (4) Concept (1) above, and additionally RB of numerology 2 starts in the natural grid of numerology 2, that is, z * N2 * Δf2 + Fref. (N2 is the RB size of numerology 2, integer z)
    [0082] If Δf2 is related to ΔF1 as F2 Δ = XΔF1, X integer, then concepts (2), (3), (4) provide that for any integer z, there is an integer y such that y * Nl * Δfl = z * N2 * Δf2 = z * N2 * X Δfl -> y * Nl = z * N2 * X.
    [0083] This provides that (N2 * X) / N1 must be an integer. For N2 = N1 this is always accomplished.
    [0084] In the following description, "K2" will indicate the bandwidth of a numerology 2 RB expressed in the smallest subcarrier spacing of the applicable numerologies for the carrier. If N2 = N1, then K2 = X * N1. Likewise, "Kl" denotes the bandwidth of a numerology 1 RB expressed in the smallest sub carrier spacing of the applicable numerologies for the carrier.
    [0085] Δf subcarrier spacing will denote the narrow subcarrier spacing defined by a carrier. For example, if a carrier employs a first numerology having sub-carrier spacing Δfl = 15kHz and a second numerology having sub-carrier spacing Δf2 = 60kHz, then the narrower subcarrier spacing Δf will be 15kHz.
    [0086] The respective values for Δf, KI and K2 can be used by a device (for example, a wireless communication device or radio access node), to determine the respective start and bandwidth for different numerologies, such as illustrated by Figure 3
    [0087] Figure 3 illustrates how an initial allocation and width can be determined for two different numerologies defined in relation to a common frequency reference, based on the integers A and C, and B and D, respectively, according to a modality of the subject described. Figure 4 illustrates how RBs can be allocated to create a guard band between two numerologies on the same carrier according to a modality of the subject described.
    [0088] Referring to Figure 3, the integers can be signaled from one or more devices to one or more other devices (for example, from an eNB to one or more UEs). Signaling allows the receiving devices to determine the respective initial frequencies and the widths of their numerology / s with a relatively small header. Note that in the example in Figure 3, two blocks of data corresponding to two different numerologies can be allocated to two different users.
    [0089] In the example of Figure 3, an initial frequency for a first numerology is defined in relation to Fref as Fref + B * Kl * Δf, and a width of the first numerology is defined as D * Kl * Δf. Likewise, an initial frequency for a second numerology is defined in relation to Fref as Fref + A * K2 * Δf, and a width of the first numerology is defined as C * K2 * Δf.
    [0090] In some modalities, A and C are signaled in downlink control information (DCI) and B and D are also signaled in DCI, where the DCI loading A and C can be the same or different from the DCI loading Be D .
    [0091] In some modalities, Kl and K2 can be pre-configured values, for example, defined by a product or standard specification. In some other modalities, Kl and K2 can be configured semi-statically. In the drawings we denote by Δf the narrowest subcarrier spacing defined for the carrier. This can be fixed (defined in the specification) or dynamically configured.
    [0092] As an alternative to the examples shown in Figures 3 and 4, in some situations, a bitmap may be flagged instead of the integers. In the bitmap, each bit represents a part of a carrier (group of M RBs in the corresponding numerology that the bitmap is for), and the bit value indicates whether that part of the band is allocated or not. Having a single bit to indicate a large group of RBs reduces the signaling load (fewer bits needed to carry). Yet another alternative to the examples shown in Figures 3 and 4, a UE can store a table (or other applicable data structure) with defined numerologies, and then the UE can receive an index for the UE table, which will inform the UE of relevant information for the defined numerologies.
    [0093] In a system with multiple numerologies according to certain modalities, a bit would indicate one or multiple RBs, defined by the numerology RB grid. A guard band can be inserted by properly setting the allocation bitmaps (as shown in Figure 6, top example). From the example, it can be noted that the smallest possible guard band is the same as the size of the RB group indicated by a single bit. This can lead to excessively large guard bands.
    [0094] Here we propose to signal a shift (with values from 0 to M-1) together with the bitmap (the number of bits required for this is log2 (M)). The shift changes the initial RB of the group of RBs indicated by each bit. This allows to control the guard band in a granularity of the RB size of numerology with the smallest subcarrier spacing. The idea is illustrated in Figure 6 (example of fund allocation). Note that, with this way of representing an allocation, the RB grid, as discussed above, is still respected.
    [0095] The following is an additional description of certain concepts presented above, along with a description of other possible features of mixed numerology systems.
    [0096] In an OFDM system that supports mixed numerologies, different OFDM numerologies are multiplexed in the frequency domain on the same carrier. This benefits the simultaneous support of services with very different requirements, for example, very low latency communications (short symbols and, therefore, large subcarrier spacing) and MBMS services (long symbols to enable the long cyclic prefix and, therefore, narrow the spacing subcarrier).
    [0097] In a conventional OFDM system, all subcarriers are orthogonal to each other. The subcarrier transfer functions are not "brick wall" pulses, but have a sinc-like behavior; orthogonality between subcarriers is achieved through waveform properties and not through energy confinement to a subcarrier bandwidth (sinc type since in discrete time signal processing, a rectangular pulse is not exactly a sinc function) . In an OFDM system with different numerologies (subcarrier bandwidth and / or clinical prefix length) multiplexed in the frequency domain, see Figure 7, only subcarriers within a numerology are orthogonal to each other. Sub-carriers of one numerology interfere with sub-carriers of another numerology, since energy leaks outside the sub-carrier bandwidth and is captured by sub-carrier filters of the other numerology.
    [0098] To reduce inter-numerology interference, the transmission spectrum of each numerology must be better confined, that is, a better spectrum roll-off is necessary.
    [0099] Figure 8 shows two sub-bands with different numerologies. An aggressive numerology (dashed lines) must apply a spectrum emission containment technique to reduce the energy transmitted in the pass band of victim numerology (810). However, emission control alone is not sufficient, since a victim receiver without a steeper slope (815) captures high interference from the bandwidth of the aggressive numerology. Only if the victim receiver (820) and the attacking transmitter (810) have improved filter functions, inter-numerology interference is efficiently reduced.
    [00100] Windowing (w / nc / ow / ng) and filtering are techniques to improve the characteristics of transmitter and receiver in relation to spectral confinement.
    [00101] Guard tones can be inserted between numerologies to reduce inter-numerology interference and / or relax the required degree of spectrum confinement required. Adding guard tones slightly increases the header; in a 20 MHz system with 1200 subcarriers, a guard tone corresponds to less than 0.1% of the header. Trying to minimize guard tones to an absolute minimum may therefore not be worth the effort (as it increases the demands on the spectrum confinement technique at both the transmitter and the receiver), and also complicates other aspects of system design, as Described below.
    [00102] Figure 9 illustrates a narrow band subcarrier inserted as a guard interval between the first and second numerologies 1 and 2 according to a modality of the subject described. The first subcarrier of numerology 2 is located at 41 x 15 "kHz" which corresponds to subcarrier 10.25 in the 60 kHz subcarrier network.
    [00103] With reference to Figure 9, a narrowband subcarrier is inserted as a guard between numerology 1 (905, for example, 15 kHz) and numerology 2 (910.4 times as wide subcarriers, for example, 60 kHz ). A resource block is 12 subcarriers (narrowband or broadband) for both numerologies. If the scheduling is done as indicated for numerology 2 then the numerology 2 subcarriers are not even in the 60 kHz resource grid (the first subcarrier of a RB in 910 is on the narrow subcarrier 41 which corresponds to the wide subcarrier 10.25, therefore a change of fractional subcarrier).
    [00104] To avoid fractional subcarrier changes, subcarrier frequencies in each numerology must coincide with the natural numerology grid n x Δf, with Δfo numerology subcarrier spacing. However, even with this requirement, the large resource blocks (numerology 2) are still not in their natural grid, when compared to cell 2.
    [00105] Figure 10, for example, illustrates four narrowband subcarriers inserted as guard between numerology 1 and 2 according to a modality of the subject described. Numerology 2 subcarriers are now located in its natural resource grid. However, the numerology 2 resource blocks are still misaligned across cells.
    [00106] This misaligned resource grid implies that all users of numerology 2 would have to be dynamically informed about this displacement (since this displacement depends on the scheduling decision). In another cell, a different displacement may be present, or, as shown in Figure 10, another cell can only operate with numerology 2. Resource blocks in different cells would not be aligned, making inter-cell interference coordination (ICIC), creating signals orthogonal reference points through cells, and prediction of interference through more difficult cells.
    [00107] Alternatively, a resource block 1005 in cell 1 in Figure 10 could be a fractional resource block (corresponding to the bandwidth marked by "Misalignment"). Special definitions of reference signals and rate matching would be required for all possible fractional resource blocks. For the fractional resource block in cell 1 and the overlapping resource block in cell 2, the same disadvantages as mentioned above are valid.
    [00108] Figure 11 illustrates eight narrowband subcarriers inserted as a guard interval between numerology 1 and 2 according to a modality of the subject described. The numerology 2 subcarriers are located in their natural resource grid and blocks of numerology 2 resources are aligned across the cells. In the example in Figure 11, numerology 1 resource blocks (15 kHz) would always start at nxi2xi5kHz frequency and numerology 2 resource blocks (60 kHz) at nxi2x60kHz frequency (it is assumed that a resource block is 12 subcarriers) in relation to reference frequency. This simplifies ICIC, facilitates the prediction of interference across cells, and allows orthogonal reference signals of the same numerology across cells.
    [00109] For the combination of numerology of 15/60 kHz, the resulting guard band is 8 narrow band subcarriers (15 kHz). For the combination of 15/30 kHz or 30/60 kHz, the guard band would be 10 narrow band subcarriers. In a 20 MHz system with about 1200 narrowband subcarriers, the loss is less than 1%.
    [00110] The described modalities can be implemented in any appropriate type of communication system supporting any suitable communication standards and using any suitable components. As an example, certain modalities can be implemented in a communication system such as the one illustrated in Figure 12. Although certain modalities are described in relation to 3GPP systems and related terminology, the concepts described are not limited to a 3GPP system. In addition, although reference can be made to the term "cell", the concepts described can also be applied in other contexts, such as beams used in fifth generation (5G) systems, for example.
    [00111] Referring to Figure 12, a communication network 1200 comprises a plurality of wireless communication devices 1205 (for example, conventional UEs, machine [MTC] / machine-to-machine [M2M] communication UEs) and a plurality of radio access nodes 1210 (for example, eNóBs, gNóBs or other base stations). Communication network 1200 is organized into cell areas 1215 served by radio access nodes 1210, which are connected to a core network 1220. Radio access nodes 1210 are capable of communicating with wireless communication devices 1205 along with any additional elements suitable for supporting communication between wireless communication devices or between a wireless communication device and another communication device (such as a landline).
    [00112] Although wireless communication devices 1205 may represent communication devices that include any suitable combination of hardware and / or software, such wireless communication devices may, in certain embodiments, represent devices such as those illustrated in greater detail by Figures 13A and 13B. Similarly, although the illustrated radio access node may represent network nodes that include any suitable combination of hardware and / or software, these nodes may, in particular embodiments, represent devices as illustrated in greater detail by Figures 14A, 14B and 15.
    [00113] With reference to Figure 13A, a 1300A wireless communication device comprises a processor or 1305 processing circuit (for example, Central Processing Units [CPUs], Application Specific Integrated Circuits [ASICs], Programmable Port Array in Field [FPGAs], and / or the like), a 1310 memory, a 1315 transceiver and an 1320 antenna. In certain embodiments, some or all of the functionality described as being provided by UEs, MTC or M2M devices, and / or any other types Wireless communication devices can be provided by the processing circuit by executing instructions stored in a computer-readable medium, such as 1310 memory. Alternative modalities may include additional components in addition to those shown in Figure 13A that may be responsible for providing certain aspects of the functionality of the device, including any of the features described here.
    [00114] With reference to Figure 13B, a 1300B wireless communication device comprises at least one 1325 module configured to perform one or more corresponding functions. Examples of such functions include various method steps or combinations of method steps as described herein with reference to wireless communication device (s). For example, 1325 modules may comprise an addressing module configured to address physical resources as described above, and a transmit and / or receive module configured to transmit and / or receive information as described above. In general, a module can comprise any suitable combination of software and / or hardware configured to perform the corresponding function. For example, in some modalities, a module comprises software configured to perform a corresponding function when executed on an associated platform, such as that illustrated in Figure 13 A.
    [00115] With reference to Figure 14A, a radio access node 1400A comprises a control system 1420 comprising a 1405 node processor or processing circuit (for example, Central Processing Units [CPUs], Application Specific Integrated Circuits [ASICs], Field Programmable Port Array [FPGAs], and / or the like), memory 1410 and a network interface 1415. In addition, the radio access node 1400A comprises at least one radio unit 1425 comprising at least a transmitter 1435 and at least one receiver coupled to at least one antenna 1430. In some embodiments, radio unit 1425 is external to the control system 1420 and connected to the control system 1420 through, for example, a wired connection (for example , an optical cable). However, in some other embodiments, the radio unit 1425 and potentially the antenna 1430 are integrated together with the control system 1420. Node processor 1405 operates to provide at least one function 1445 from radio access node 1400A as here described. In some embodiments, the functions are implemented in software that is stored, for example, in memory 1410 and executed by node processor 1405.
    [00116] In certain embodiments, some or all of the functionality described as being provided by a base station, a B node, an eNodeB and / or any other type of network node can be provided by the 1405 node processor executing instructions stored in a computer readable medium, such as memory 1410 shown in Figure 14A. Alternative embodiments of the radio access node 1400 may comprise additional components to provide additional functionality, such as the functionality described herein and / or related support functionality.
    [00117] With reference to Figure 14B, a radio access node 1400B comprises at least one module 1450 configured to perform one or more corresponding functions. Examples of such functions include various method steps or combinations of method steps as described herein with reference to radio access node (s). For example, modules 1450 may comprise an addressing module configured to address physical resources as described above, and a transmit and / or receive module configured to transmit and / or receive information as described above. In general, a module can comprise any suitable combination of software and / or hardware configured to perform the corresponding function. For example, in some modalities, a module comprises software configured to perform a corresponding function when executed on an associated platform, such as that illustrated in Figure 14 A.
    [00118] Figure 15 is a block diagram illustrating a virtualized radio access node 1500 according to a modality of the subject described. The concepts described in relation to Figure 15 can be applied in a similar way to other types of network nodes. In addition, other types of network nodes may have similar virtualized architectures. As used here, the term "virtualized radio access node" refers to an implementation of a radio access node in which at least some of the functionality of the radio access node is implemented as a virtual component (for example , through virtual machine (s) running on a physical processing node (s) on a network (s)).
    [00119] Referring to Figure 15, the radio access node 1500 comprises the control system 1420, as described in relation to Figure 14 A.
    [00120] The control system 1420 is connected to one or more processing nodes 1520 coupled to or included as part of a network (s) 1525 via network interface 1415. Each processing node 1520 comprises one or more processors or circuitry processing 1505 (for example, CPUs, ASICs, FPGAs and / or the like), memory 1510 and a network interface 1515.
    [00121] In this example, functions 1445 of radio access node 1400A described herein are implemented on one or more processing nodes 1520 or distributed through the control system 1420 and one or more processing nodes 1520 in any desired manner. In some embodiments, some or all of the functions 1445 of the radio access node 1400A described here are implemented as virtual components executed by one or more virtual machines implemented in a virtual environment (s) hosted by the processing node (s) 1520. As will be appreciated by one skilled in the art, signaling or additional communication between processing node (s) 1520 and control system 1420 is used to perform at least some of the desired functions 1445. As indicated by dotted lines, in some embodiments the system of control 1420 can be omitted, in which case the radio unit (s) 1425 communicates directly with the processing node (s) 1520 via an appropriate network interface (s).
    [00122] In some embodiments, a computer program comprises instructions that, when executed by processing circuits, cause the processing circuits to perform the functionality of a radio access node (for example, radio access node 1210 or 1400A) or another node (for example, processing node 1520) implementing one or more of the functions of the radio access node in a virtual environment of any of the modalities described here.
    [00123] Figure 16 is a flow chart illustrating a method of operation of a wireless communication device or a radio access node according to a modality of the subject described.
    [00124] With reference to Figure 16, the method comprises addressing system resources of multiple subcarriers (S1605) using at least one of the multiple different numerologies available within a single carrier, where the multiple different numerologies comprise a first numerology having blocks of resources (RBs) with a first bandwidth and a first subcarrier spacing, Δfl and a second numerology having RBs with a second bandwidth and a second subcarrier spacing, Δf2, which is different from Δfl, and in which the first numerology is aligned in the frequency domain in relation to a frequency reference, Fref, according to m * Δfl + Fref and the second numerology is aligned in the frequency domain in relation to the frequency reference, Fref, according to n * Δf2 + Fref, where men are integers.
    [00125] The method also comprises transmitting and / or receiving information within the single carrier according to at least one of the multiple different numerologies (S1610).
    [00126] The following acronyms, among others, are used in this description. 3GPP Third Generation Partnership Project EARFCN Absolute radio frequency channel number EUTRA EUTRA Evolved LTE Universal Terrestrial Radio Access Long Term Evolution NX New 3GPP Radio (alternatively, referred to as NR) NX-ARFCN Absolute radio frequency channel number PSS Primary Sync Signal SSS Secondary Sync Signal UARFCN Absolute radio frequency channel number UTRA UTRA Universal Terrestrial Radio Access
    [00127] As indicated above, certain modalities of the described subject provide a resource allocation grid and / or an addressing scheme defined for at least two numerologies that allow an adequate coexistence in a system operating with mixed numerologies.
    [00128] Although the subject described has been deposited above with reference to various modalities, it will be understood that several changes in the form and details can be made to the described modalities without departing from the general scope of the described matter.
    权利要求:
    Claims (26)
    [0001]
    1. Method for operating user equipment (1300), characterized by the fact that it comprises: addressing multiple subcarrier system resources (S1605) using at least one from a first numerology and a second numerology from multiple different numerologies available within a single carrier, the first numerology having resource blocks (RBs) with a first bandwidth and a first subcarrier spacing, Δfl, and the second numerology having RBs with a second bandwidth and a second subcarrier spacing, Δf2, which is different from Δfl, and where the first numerology is aligned in the frequency domain in relation to a frequency reference, Fref, according to m * Δfl + Fref and the second numerology is aligned in the frequency domain in relation to the reference of frequency, Fref, according to n * Δf2 + Fref, where men are integers; and transmitting and / or receiving information (S1610) within the single carrier according to at least one of the first numerology and the second numerology of multiple different numerologies.
    [0002]
    2. Method, according to claim 1, characterized by the fact that RB subcarriers allocated from the first numerology are separated from RB subcarriers allocated from the second numerology by a frequency gap having a size that is a function of Δfl or Δf2.
    [0003]
    3. Method, according to claim 1, characterized by the fact that the first subcarrier spacing, Δfl, is related to the second subcarrier spacing Δf2 by an integer scale factor N such that Δf2 = N * Δfl.
    [0004]
    4. Method, according to claim 3, characterized by the fact that Δfl = 15 kHz and Δf2 = 60 kHz.
    [0005]
    5. Method according to claim 1, characterized by the fact that the single carrier has a bandwidth of approximately 10 MHz or 20 MHz.
    [0006]
    6. Method, according to claim 1, characterized by the fact that the multiple subcarrier system is an orthogonal frequency division multiplexing (OFDM) system.
    [0007]
    7. Method according to claim 6, characterized by the fact that the multiple subcarrier system is a pre-coded multiple subcarrier system.
    [0008]
    8. Method, according to claim 7, characterized by the fact that the pre-coded multiple subcarrier system is a Discrete Fourier Transform (DFT) (DFTS-OFDM) spreading system.
    [0009]
    9. Method according to claim 1, characterized by the fact that at least one of the multiple different numerologies comprises a plurality of different numerologies.
    [0010]
    10. Method, according to claim 1, characterized by the fact that it also comprises transmitting or receiving first and second integers B and D indicating an initial frequency in relation to a frequency reference and width of a first numerology among the multiple different numerologies , where the initial frequency is defined according to B * Kl * Δf, and the bandwidth of the first numerology is defined according to D * Kl * Δf, where Kl denotes a bandwidth of a smaller addressable unit of the first numerology, expressed in units of a lower spacing of single carrier numerology subcarriers, and where Δf denotes the smallest spacing of subcarriers.
    [0011]
    11. Method according to claim 10, characterized by the fact that it also comprises transmitting or receiving third and fourth integers A and C indicating an initial frequency in relation to a frequency reference and width of a second numerology among the multiple different numerologies , where the initial frequency of the second numerology is defined according to A * K2 * Δf, and the bandwidth of the second numerology is defined according to C * K2 * Δf, where K2 denotes a bandwidth of a lower addressable unit of the second numerology, expressed in units of the smallest spacing of single-carrier numerology subcarriers.
    [0012]
    12. Method according to claim 10, characterized by the fact that the first to fourth integers are transmitted or received in downlink control (DCI) information.
    [0013]
    13. Method, according to claim 1, characterized by the fact that it also comprises transmitting or receiving a bitmap indicating an allocation of resources from each of the at least one of the multiple different numerologies.
    [0014]
    14. User equipment (1300), characterized by the fact that it comprises: processing circuits (1305) and memory (1310) collectively configured to address multiple subcarrier system resources (S1605) using at least one of a first numerology and one second numerology of different numerologies available on a single carrier, the first numerology having resource blocks (RBs) with a first bandwidth and a first subcarrier spacing, Δfl, and the second numerology having RBs with a second bandwidth and one second sub carrier spacing, Δf2, which is different from Δfl, and where the first numerology is aligned in the frequency domain in relation to a frequency reference, Fref, according to m * Δfl + Fref and the second numerology is aligned in frequency domain in relation to the frequency reference, Fref, according to n * Δf2 + Fref, where men are integers; and at least one transmitter and / or receiver configured to transmit and / or receive information (S1610) within the single carrier according to at least one of the first numerology and the second numerology of multiple different numerologies.
    [0015]
    15. User equipment according to claim 14, characterized by the fact that RB subcarriers allocated from the first numerology are separated from RB subcarriers allocated from the second numerology by a frequency gap having a size that is a function of Δfl or Δf2 .
    [0016]
    16. User equipment according to claim 14, characterized by the fact that the first subcarrier spacing, Δfl, is related to the second subcarrier spacing Δf2 by an integer scale factor N such that Δf2 = N * Δfl.
    [0017]
    17. User equipment, according to claim 16, characterized by the fact that Δfl = 15 kHz and Δf2 = 60 kHz.
    [0018]
    18. User equipment according to claim 14, characterized by the fact that the single carrier has a bandwidth of approximately 10 MHz or 20 MHz.
    [0019]
    19. User equipment according to claim 14, characterized by the fact that the multiple subcarrier system is an orthogonal frequency division multiplexing (OFDM) system.
    [0020]
    20. User equipment according to claim 19, characterized by the fact that the multiple subcarrier system is a pre-coded multiple subcarrier system.
    [0021]
    21. User equipment according to claim 20, characterized by the fact that the pre-coded multiple subcarrier system is a Discrete Fourier Transform (DFT) spreading system (DFTS-OFDM).
    [0022]
    22. User equipment according to claim 14, characterized by the fact that at least one of the multiple different numerologies comprises a plurality of different numerologies.
    [0023]
    23. User equipment according to claim 14, characterized by the fact that at least one transmitter and / or receiver is further configured to transmit and / or receive first and second integers B and D indicating an initial frequency in relation to a reference of frequency and width of a first numerology between multiple different numerologies, where the initial frequency is defined according to B * Kl * Δf, and the bandwidth of the first numerology is defined according to D * Kl * Δf , where Kl indicates a bandwidth of a smaller addressable unit of the first numerology, expressed in units of smaller spacing of single carrier numerology subcarriers, and where Δf denotes the smallest subcarrier spacing.
    [0024]
    24. User equipment according to claim 23, characterized by the fact that at least one transmitter and / or receiver is further configured to transmit and / or receive the third and fourth integers A and C indicating an initial frequency in relation to a reference of frequency and width of a second numerology between multiple different numerologies, where the initial frequency of the second numerology is defined according to A * K2 * Δf, and the bandwidth of the second numerology is defined according to C * K2 * Δf, where K2 indicates a bandwidth of the smallest addressable unit of the second numerology, expressed in units of the smallest single-carrier numerology subcarrier spacing.
    [0025]
    25. User equipment according to claim 23, characterized by the fact that the first to fourth integers are transmitted or received in downlink control (DCI) information.
    [0026]
    26. User equipment according to claim 25, characterized by the fact that at least one transmitter and / or receiver is further configured to transmit or receive a bitmap indicating an allocation of resources from each of the at least one of multiple different numerologies
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    CN110278063A|2019-09-24|
    CA3022668C|2019-07-16|
    US20190059087A1|2019-02-21|
    PH12018502369B1|2019-09-09|
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    JP2019517178A|2019-06-20|
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    KR20180137577A|2018-12-27|
    JP6666468B2|2020-03-13|
    US10575306B2|2020-02-25|
    DK3618342T3|2020-11-16|
    WO2017195048A1|2017-11-16|
    RU2695801C1|2019-07-29|
    EP3455978B1|2019-10-23|
    BR112018073203A2|2019-02-19|
    ZA201806780B|2020-09-30|
    CN107690768A|2018-02-13|
    JP2022023918A|2022-02-08|
    CA3022668A1|2017-11-16|
    US20180124791A1|2018-05-03|
    HUE053060T2|2021-06-28|
    ES2843826T3|2021-07-20|
    AU2017263180A1|2018-11-01|
    JP6968138B2|2021-11-17|
    US10952217B2|2021-03-16|
    US9820281B1|2017-11-14|
    DK3455978T3|2020-01-20|
    KR102084009B1|2020-03-03|
    PH12018502369A1|2019-09-09|
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    法律状态:
    2020-04-14| B09A| Decision: intention to grant [chapter 9.1 patent gazette]|
    2020-04-14| B15K| Others concerning applications: alteration of classification|Free format text: A CLASSIFICACAO ANTERIOR ERA: H04L 5/00 Ipc: H04L 5/00 (2006.01), H04W 72/04 (2009.01), H04L 27 |
    2020-10-13| B16A| Patent or certificate of addition of invention granted [chapter 16.1 patent gazette]|Free format text: PRAZO DE VALIDADE: 20 (VINTE) ANOS CONTADOS A PARTIR DE 01/03/2017, OBSERVADAS AS CONDICOES LEGAIS. |
    优先权:
    申请号 | 申请日 | 专利标题
    US201662336302P| true| 2016-05-13|2016-05-13|
    US62/336,302|2016-05-13|
    PCT/IB2017/051208|WO2017195048A1|2016-05-13|2017-03-01|Multi-subcarrier system with multiple numerologies|
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