method of operating a node, and, node in a cellular communications network

专利摘要:
1/1 summary “one-node operating method,” and not on a cellular communications network, systems and methods are exposed to trigger an operating mode Long-range extension for a wireless device (16) in a cellular communication network (10). In a preferred embodiment, the wireless device (16) is a machine type (mtc) communication device. In one embodiment, a node (20) in the cellular communication network (10) determines that the wireless device (16) is to operate in long range extension mode if it is difficult to establish communication. Between the wireless device (16) and the cellular communication network (10). if the wireless device (16) is to operate in long range extension mode, node (20) triggers one or more long range extension mechanisms with respect to the wireless device (16) ) such that the wireless device (16) operates in the long range extension mode. In this way, the long range extension mode is selectively activated for the wireless device (16).
公开号:BR112015010821A2
申请号:R112015010821
申请日:2013-11-13
公开日:2019-12-17
发明作者:Wallén Anders；Erikson Erik；Bergman Johan；Dimou Konstantinos；Balachandran Kumar
申请人:Ericsson Telefon Ab L M；
IPC主号:

专利说明:

“METHOD OF OPERATION OF A NODE, AND, NODE IN A MOBILE COMMUNICATION NETWORK”
Related Orders [001] This application claims the benefit of provisional patent application serial number 61 / 725,951, filed on November 13, 2012, the exhibition of which is hereby incorporated by reference in its entirety by reference.
Exhibition Field [002] The present exhibition refers to a cellular communication network and more particularly it relates to triggering a long-range extension operation mode for a wireless device operating on the cellular communication network.
Rationale [003] There is a growing need to support efficient and low-cost devices or terminals on a cellular communication network. This is especially true of the development of Machine to Machine Communications (M2M), which is currently receiving an increasing amount of attention and development. Unlike traditional services, such M2M services such as voice and web streaming, often have very different requirements on the cellular communication network. This is due, at least in part, to the specific characteristics of M2M services such as those specified in the Technical Specification (TS) 22,368 VI 1.6.0 Society Project 3 Generation (3GPP) Service requirements for Machine-Type Communications (TCM); Stage 1. Another feature that distinguishes cellular communication networks with M2M communications is the huge increase in the number of Machine Type Communication (MTC) devices. Both different requirements for M2M services and the large number of TCM devices present new challenges for developing access technologies
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2/40 low-cost, spectrum-efficient and energy-efficient radio for M2M applications and MTC devices on a cellular communication network.
[004] In M2M communications, MTC devices (for example, smart meters, signs, cameras, remote sensors, laptops and appliances) are connected to the cellular communication network. Most MTC devices sporadically transmit one or only a few short packages containing measurements, reports and triggers, for example, temperature, humidity, wind speed, etc. In most cases, TCM devices are expected to be static or to have low mobility. A common understanding of MTC devices is that MTC devices should be of low complexity for low-end applications (low average revenue per user, low data rate, high latency tolerance). The power / energy consumption of MTC devices is also expected to be low.
[005] Several factors affect the cost for both making and operating a given wireless device. The main industrial cost agents are: (1) processing speed (mainly at reception), (2) number of antennas, and (3) bandwidth. Therefore, 3GPP Radio Access Network (RAN) - Working Group 1 (ie RAN1) studied User Equipment (UE) modem cost reduction techniques for Long Term Evolution (LTE) for provision of UEs low cost MTC based on LTE. The results of the study are documented in the Technical Report of 3GPP (TR) 36.888 V2.0.0 (3GPP Tdoc RP-120714), Study on provision of lowcost Machine-Type Communications (MTC) User Equipments (UEs) based on LTE. Since then, an updated Study Item Description (SID) (3GPP Tdoc RP-121441, Study on Provision of low-cost MTC Ues based on LTE) has been approved that extends the study's extension to also include study of coverage improvements. More specifically, the SID
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Updated 3/40 states that:
[006] An improvement of 20 dB coverage compared LTE cell coverage footprint defined created for ^s 'ordinary LTE UEs *' should be targeted for low - cost MTC UEs using very low rate of traffic with latency relaxed (for example, order size of 100 bytes / message in UL and 20 bytes / message in DL, and allowing latency of up to 10 seconds for DL and up to 1 hour on uplink, that is, non-voice). When identifying solutions, any other related work agreed for Release 12 should be taken into account.
[007] This new requirement in enhanced coverage for very low rate traffic with relaxed latency as the updated SID should be added to the list of requirements in the low cost MTC UE specified in 3GPP TR 36.888 section 5.1, which are:
• Support data rates equivalent to that supported by Enhanced General Packet Radio Service (EGPRS) R'99 with an EGPRS multi-slot class 2 device (2 downlink time slots (118.4 kilobits per second ( kbps)), 1 uplink time interval (59.2 Kbps), and a maximum of 3 triggered time intervals) as a minimum. This does not preclude support for higher data rates as long as the cost objectives are not compromised.
• Enable significantly improved medium spectrum efficiency for low data rate MTC traffic compared to that achieved for R99 Global System for Mobile Communications (GSM) ZPR terminals on GSM / EGPRS networks today, and ideally comparable to that of LTE. Optimizations for low-cost MTC UEs should minimize impact on spectrum efficiency achievable for other terminals (normal LTE terminals) on LTE networks Release 8-
10.
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4/40 • Ensure that the low cost LTE MTC EU service coverage footprint is not even worse than the GSM / EGPRS MTC device service footprint (on a GSM / EGPRS network) ) or that of normal LTE UEs (in an LTE network) assuming the same spectrum band.
• Ensure that global energy consumption is no worse than existing MTC devices based on GSM / General Packet Radio Service (GPRS).
• Ensure good radio frequency coexistence with LTE radio interface (Release 8-10) and legacy networks.
• Target operation of low-cost MTC UEs and legacy LTE UEs on the same carrier.
• Reuse the existing LTE / System Architecture Evolution (SAE) network architecture.
• Solutions should be specified in terms of changes to Release 10 version of the LTE specifications.
• The study item should consider optimizations for both Frequency Division Duplexing (FDD) and Time Division Duplexing (TDD) modes.
• The initial phase of the study should focus on solutions that do not necessarily require changes to the LTE base station hardware.
• Limited mobility of low-cost MTC device support (ie, no seamless transfer support or ability to operate on networks in different countries) and are low-power modules.
[008] Thus, systems and methods to not only satisfy the above mentioned requirements for MTC communication and MTC devices, but also to optimize MTC communication and the operation of MTC devices.
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TCM are desired.
Summary [009] Systems and methods are exposed to trigger a long-range extension operation mode for a wireless device on a cellular communication network. In a preferred embodiment, the wireless device is a Machine Type Communication (MTC) device. In one embodiment, a node in the cellular communication network determines that the wireless device is to operate in the long-range extension mode if there is difficulty in establishing communication between the wireless device and the cellular communication network. If the wireless device is to operate in long-range extension mode, the node triggers one or more long-range extension mechanisms in relation to the wireless device such that the wireless device operates in long-range extension mode. In this way, the long-range extension mode is selectively triggered for the wireless device. By selectively activating the long-range extension mode for wireless devices on the cellular communication network in this way, performance is improved. In one embodiment, the node is the wireless device. In another embodiment, the node is a network node such as, for example, a base station.
[0010] In one embodiment, the node determines that there is difficulty in establishing communication between the wireless device and the cellular communication network if there is difficulty in establishing a downlink from the cellular communication network to the wireless device. In another embodiment, the node determines that it is difficult to establish communication between the wireless device and the cellular communication network if it is difficult to establish an uplink from the wireless device to the cellular communication network. In yet another modality, the node determines that it is difficult to establish communication between the wireless device and the cellular communication network if it is difficult to establish both.
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6/40 a downlink from the cellular communication network to the wireless device and an uplink from the wireless device to the cellular communication network.
[0011] In one embodiment, the one or more long-range extension mechanisms include one or more long-range extension mechanisms for an uplink from the wireless device to the cellular communication network. The one or more long-range extension mechanisms include one or more long-range extension mechanisms for a downlink from the cellular communication network to the wireless device in another embodiment. In yet another embodiment, the one or more long-range extension mechanisms include one or more long-range extension mechanisms for both an uplink from the wireless device to the cellular communication network and a downlink from the wireless communication network. to the wireless device.
[0012] In one embodiment, the node determines that there is difficulty in establishing communication between the wireless device and the cellular communication network when one or more parameters indicative of the difficulty in establishing communication between the wireless device and the communication network of are worse than one or more corresponding predefined thresholds.
[0013] In one mode, the node determines that it is difficult to establish communication between the wireless device and the cellular communication network when communication between the wireless device and the cellular communication network is not possible in an operating mode normal.
[0014] In another mode, the node determines that it is difficult to establish communication between the wireless device and the cellular communication network when communication between the wireless device and the cellular communication network is not possible in an operating mode normal and received signal strength in relation to the wireless device is less
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7/40 that or equal to a preset threshold signal intensity received.
[0015] In another modality, the node determines that it is difficult to establish communication between the wireless device and the cellular communication network when measurements of the Received Reference Signal Power (RSRP) for a number, N, of stronger cells made by the wireless device are each less than a predefined threshold RSRP.
[0016] In another mode, the node determines that it is difficult to establish communication between the wireless device and the cellular communication network when several unsuccessful random access attempts by the wireless device are greater than a predefined threshold number of attempts random access.
[0017] In another modality, the node determines that there is difficulty in establishing communication between the wireless device and the cellular communication network when an amount of time has elapsed since a time when the wireless device transmitted a last programming request without receiving a schedule request grant exceeds a predefined threshold schedule request delay.
[0018] In another embodiment, the node is a network node, and the network node determines that it is difficult to establish communication between the wireless device and the cellular communication network when no response is received from the wireless device after it the network node has sent a predefined number of uplink scheduling grants to the wireless device.
[0019] In another embodiment, the node is a network node, and the network node determines that it is difficult to establish communication between the wireless device and the cellular communication network when no response is received from the wireless device after it the network node sent a predefined number of radiolocation requests to the wireless device.
[0020] In another embodiment, the node is a network node, and the network node
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8/40 determines that there is difficulty in establishing communication between the wireless device and the cellular communication network when an incoming signal strength for an uplink from the wireless device to the network node is less than a signal strength received from predefined uplink.
[0021] In one mode, the node is the wireless device, and if the wireless device is to operate in long-range extension mode, the wireless device attempts random access using one or more features dedicated to the mode long-range extension operation. In another embodiment, the node is the wireless device, and if the wireless device is to operate in long-range extension mode, the wireless device attempts to transmit a schedule request using one or more resources dedicated to the mode long-range extension operation.
[0022] In one embodiment, the node is a network node and, in order to activate one or more long-range extension mechanisms, the network node is configured to signal information to the wireless device that is indicative of one or more more dedicated radio resources for random access attempts in long-range operation mode, one or more dedicated radio resources for uplink programming requests in long-range operation mode, or both.
[0023] In one embodiment, the node is the wireless device. The wireless device is configured to receive information that is indicative of one or more dedicated radio resources for random access attempts in long-range extension operation mode, one or more dedicated radio resources for uplink programming requests on the long-range extension operation mode, or both. In order to activate one or more long-range extension mechanisms, the wireless device is furthermore configured to trigger the use of one or more dedicated radio resources for random access attempts in the mode
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9/40 long-range extension operation, one or more radio resources dedicated to uplink programming requests in long-range extension operation mode, or both.
[0024] In one embodiment, the node is a network node, and in order to activate one or more long-range extension mechanisms, the network node is furthermore configured to transmit a request to the device wirelessly to the device Wirelessly operate in the long-range extension operation mode.
[0025] In one embodiment, the node is the wireless device, and the wireless device is furthermore configured to determine that it is difficult to establish communication between the wireless device and the cellular communication network when the wireless device is stationary and within a coverage hole within a coverage area of the cellular communication network.
[0026] In one embodiment, the node is the wireless device, and the wireless device is furthermore configured to disable one or more long-range extension mechanisms in response to signaling from a network node of the communication network. device that forces the wireless device out of long-range extension operation and into normal operating mode.
[0027] In one embodiment, the node is a network node, and the network node is furthermore configured to subsequently force the wireless device to disable one or more long-range extension mechanisms such that the wireless device enter normal operating mode.
[0028] In another mode, the node is furthermore configured to select one or more parameters for the long-range extension operation mode as a function of a level of difficulty in establishing communication between the cellular communication network and the device without wires.
[0029] Those skilled in the art will appreciate the extent of
16/53 / 40 present exhibition and will perceive additional aspects of it after reading the following detailed description of the preferred embodiments in association with the accompanying drawing figures.
Brief Description of the Drawing Figures [0030] The accompanying drawing figures incorporated within and forming part of this specification illustrate various aspects of the exhibition, and together with the description serve to explain the principles of the exhibition.
[0031] Figure 1 illustrates a cellular communication network according to a modality of the present exhibition;
[0032] Figure 2 illustrates a process by which a node in the cellular communication network of Figure 1 selectively triggers a long-range extension mode for a wireless device according to a mode of the present exposure;
[0033] Figure 3 illustrates a process by which a node in the cellular communication network of Figure 1 decides whether a wireless device is to be in long-range extension mode or a normal mode according to a present exposure mode;
[0034] Figure 4 illustrates a process by which a node in the cellular communication network of Figure 1 decides whether a wireless device is to be in the long range extension mode or the normal mode according to another mode of the present exposure;
[0035] Figure 5 illustrates a process by which a node in the cellular communication network of Figure 1 decides whether a wireless device is to be in long-range extension mode or in normal mode according to another mode of the present exposure;
[0036] Figure 6 illustrates a process by which a wireless device attempts random access and / or a transmission of program request using radio resources dedicated to the long-range extension mode according to a present exposure modality;
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11/40 [0037] Figure 7 illustrates the operation of the cellular communication network of Figure 1 according to a mode in which the base station signals radio resources to the wireless device that are dedicated for random access and / or transmissions. programming request for the long-range extension operation mode;
[0038] Figure 8 illustrates a process by which a network node (for example, a base station) in the cellular communication network of Figure 1 decides whether a wireless device is to be in long-range extension mode or in normal according to another modality of the present exposure;
[0039] Figure 9 illustrates the operation of the cellular communication network of Figure 1 according to a mode in which the base station sends a request to the wireless device to operate in the long-range extension operation mode [0040] Figure 10 illustrates an example of a Radio Resource Control (RRC) message that can be used by the base station in Figure 9 to send the request to the wireless device to operate in the long-range extension operation mode according to an present exhibition;
[0041] Figure 11 illustrates the operation of a stationary wireless device to operate permanently in the long-range extension operation mode according to a present exposure mode;
[0042] Figure 12 illustrates the operation of a base station to force a wireless device out of the extended range operating mode according to a present display mode;
[0043] Figure 13 illustrates a process by which a node selects values for one or more parameters for the long-range extension operation mode according to a present exposure mode;
[0044] Figure 14 illustrates the operation of the cellular communication network
18/53 / 40 of Figure 1 according to a modality in which a base station selects values for one or more parameters for the long-range extension operation mode of a wireless device according to a present display modality; and [0045] Figure 15 is a block diagram of a node (for example, a wireless device or a base station) in the cellular communication network of Figure 1 according to an embodiment of the present exposure.
Detailed Description [0046] The embodiments published below represent the information needed to enable those qualified in the art to practice the concretizations and illustrate the best way to practice the concretizations. By reading the following description in the light of the accompanying drawing figures, those skilled in the art will understand the concepts of the exhibition and recognize applications of these concepts not particularly dealt with here. It should be understood that these concepts and applications fall within the scope of the exhibition and the accompanying claims.
[0047] Systems and methods are exposed to trigger a long-range extension operation mode for a wireless device on a cellular communication network. The wireless device is preferably a Machine Type Communication (MTC) device, but it can alternatively be any wireless device on the cellular communication network capable of operating in the long range operation mode. In one embodiment, a node in the cellular communication network determines whether the wireless device is to operate in long-range extension mode or a normal mode. If the wireless device is to operate in long-range extension mode, the node triggers one or more long-range extension mechanisms in relation to the wireless device such that the wireless device operates in long-range extension mode. In this way, the long-range extension mode is selectively triggered for the device without
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[0048] By selectively activating the long range extension mode for wireless devices on the cellular communication network in this way, performance is improved. More specifically, wireless devices operating according to existing cellular communications standards (for example, existing Long Term Evolution (LTE) standards) reach a practical limit in relation to the maximum acceptable propagation loss while still maintaining corresponding radio links between wireless devices and the cellular communication network (particularly the Radio Access Network (RAN) of the cellular communication network). One or more long-range extension mechanisms can be used to increase this maximum loss of path. However, these long-range extension mechanisms can come at a cost in terms of a loss in another performance metric such as, for example, increased radio resources needed, decreased maximum processing, increased energy consumption, and system spectral efficiency. decreased. These losses may be acceptable in order to serve wireless devices that experience high loss of propagation, but may result in unnecessary losses in another performance metric for wireless devices that do not experience high loss of propagation. Embodiments of the systems and methods exposed here can be used to selectively engage the long range extension mode only for those wireless devices that experience high loss of propagation (that is, only for those wireless devices that need it). In this way, wireless devices that do not suffer from high loss of propagation do not suffer from performance losses associated with long-range extension mechanisms.
[0049] In this consideration, Figure 1 illustrates a cellular communication network 10 according to a modality of the present exposure. Notably, in many of the embodiments described here, the network of
20/53 / 40 cellular communication 10 is an LTE cellular communication network (i.e., LTE or Advanced LTE). As such, LTE terminology is often used throughout this exhibition. However, the concepts and embodiments exposed here are not limited to LTE and can be used in any satisfactory type of cellular or wireless network.
[0050] As illustrated, the cellular communication network 10 includes a RAN 12 including several base stations 14-1 and 14-2 (generally referred to here collectively as base stations 14 and individually as base station 14). Base stations 14 provide wireless access to wireless devices 16-1 by 16-3 (generally referred to here collectively as wireless devices 16 and individually as wireless device 16) within coverage areas (e.g. cells) of stations base 14. Base stations 14 are connected to a core network 18. Note that while only two base stations 14 and three wireless devices 16 are illustrated in this example for clarity and ease of discussion, cellular communication network 10 may include many base stations 14 serving many wireless devices 16. In LTE terminology, wireless devices 16 are called User Equipment (UEs), and base stations 14 are called Enhanced or Enhanced B Nodes (eNBs). While in this modality the base stations 14 are macro base stations, RAN 12 can include a mix of macro base stations and lower power base stations (ie peak base stations, femto base stations, Domestic eNBs , etc.). At least some of the wireless devices 16 are MTC devices that perform Machine to Machine (M2M) communication. Some examples of TCM devices are smart meters, signs, cameras, remote sensors, laptops and appliances. In this example, wireless device 16-1 is an MTC device.
[0051] Wireless devices 16, or at least wireless devices 16 that are capable of M2M communication (that is, devices
21/53 / 40 MTC), are configured to operate in either a normal operating mode or a long-range extension operating mode. In one embodiment, the normal mode and the long-range extension mode are two different modes (that is, a first mode and a second mode), where, in the long-range extension mode, the wireless device 16 is configured to maintain communication (i.e., uplink and / or downlink) with cellular communication network 10 (through one of the base stations 14) over an extended range when compared to that in normal mode. This extended range is a range beyond which communication between the wireless device 16 and a corresponding base station 14 would normally be difficult or impossible. In one embodiment, a wireless device 16 operates in long-range extension mode when a radio propagation path between the wireless device 16 and a nearest base station 14 (in terms of radio distance, for example, higher received signal, Higher Reference Signal Received Power (RSRP), Higher Reference Signal Received Quality (RSRQ), or similar) is worse than a predefined threshold degree. In a particular embodiment, a wireless device 16 operates in long-range extension mode when a loss of path to a propagation path between the wireless device 16 and a nearest base station 14 (in terms of radio distance, for example) example, higher received signal strength, higher RSRP, higher RSRQ, or the like) exceeds the typical N Decibel (dB) path loss value on cellular communication network 10 for a typical inter-local distance in the order hundreds of meters.
[0052] In order to enable the long-range extension operation mode, one or more long-range extension mechanisms are used by the cellular communication network 10 (for example, by the base stations 14) and / or the devices without 16 wires that are capable of operating in long range extension mode (for example, those wireless 16 devices that
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16/40 are MTC devices or are capable of M2M communication). If a wireless device 16 is configured to operate in the long-range extension mode (specific to that wireless device 16), at least one of the one or more long-range extension mechanisms is triggered in relation to the wireless device 16. If otherwise, if wireless device 16 is configured to operate in normal operating mode and the long-range extension mechanisms are disabled. The one or more long-range extension mechanisms increase a maximum acceptable loss of propagation while still maintaining the radio interconnection (uplink and / or downlink) between wireless device 16 and cellular communication network 10 (specifically the RAN 12), which hereby enables communication within a long-range extension of RAN 12. The long-range extension mechanisms that are used to provide the long-range extension include, for example, increased transmission power in the wireless device 16 and / or base stations 14 (e.g., the nearest base station 14), increased amount of reference signal resources on the uplink and / or downlink, modified repeat schemes on the uplink and / or downlink, programming restrictions on the uplink and / or downlink, different coding and modulation schemes on the uplink nd and / or downlink, synchronization signals that are more likely to be detected by the wireless device 16 when operating in long-range extension mode, use of random access features that improve the probability of being detected by RAN 12, or similar, or any combination thereof.
[0053] As discussed below, the long-range extension mode is selectively triggered, or triggered for wireless devices 16 (for example, wireless device 16-1) that are capable of being configured in long-range mode range or in normal mode. In this
23/53 / 40 consideration, Figure 2 illustrates a process by which a node in the cellular communication network 10 selectively engages the long-range extension mode for, in this example, the wireless device 16-1 according to a mode of present exposure. The node can be either the 16-1 wireless device or a network node. As used here, a network node is a node within RAN 12 or core network 18. In addition, a radio network node is a network node within RAN 12 (for example, one of base stations 14 or some another node within RAN 12 such as, for example, a retransmission). A core network node is a network node in the core network 18 (for example, a Mobility Administration Entity (MME)).
[0054] First, the node determines whether the wireless device 16-1 is to be in long-range extension mode or in normal mode (step 100). Embodiments of how the node makes the determination in step 100 are discussed below. However, the determination is not limited to the embodiments discussed below. As an example, in one or more embodiments, the decision goes up whether the wireless device 16-1 is to operate in long-range extension mode or in normal mode is made based on an extension to which communication between the wireless device 16-1 and RAN 12 (downlink, uplink, or both) prove to be difficult. Some examples of the conditions, parameters, and thresholds that are indicative of the degree of difficulty, or level of difficulty, of maintaining communication are described below.
[0055] If the node determines that the wireless device 16-1 is to operate in the long-range extension mode, the node triggers one or more long-range extension mechanisms in relation to the wireless device 16-1 such that the wireless device 16-1 operate in long range extension mode (step 102). As discussed below, in some embodiments, the extended reach mechanisms triggered include: increased transmit power on the wireless device 16-1 and / or the base station 14
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Corresponding or closer 18/40 (for example, service base station 14 of wireless device 16-1), increased amount of reference signal resources on the uplink and / or downlink, modified repeat schemes on the uplink and / or downlink, programming restrictions on the uplink and / or downlink, different encoding and modulation schemes on the uplink and / or downlink, synchronization signals that are more likely to be detected by the wireless device 16-1 when operate in long-range extension mode, use of random access features that improve the likelihood of being detected by RAN 12, or similar, or any combination thereof. Note that these long-range extension mechanisms are just a few. Other long-range extension mechanisms can additionally or alternatively be used. Returning to step 100, if the node determines that the wireless device 16-1 is not to operate in the long-range extension mode (that is, it is to operate in the normal mode), the node, if necessary, disables the one or more long-range extension mechanisms in relation to the wireless device 16-1 such that the wireless device 16-1 operates in normal mode (step 104). Using this process, the node selectively activates / deactivates the extended range operating mode for the wireless device 16-1.
[0056] Figure 3 illustrates a process by which a node determines whether, in this example, the wireless device 16-1 is to operate in the long-range extension mode or in the normal mode according to a present exposure mode. While not limited to this, the process in Figure 3 can, in one embodiment, be used for step 100 in Figure
2. Again, the node performing the process in Figure 3 can be wireless device 16-1 or a network node (for example, service base station 14 of wireless device 16-1). First, the node determines whether communication (for example, uplink and / or downlink) between the device without
25/53 / 40 wires 16-1 and the cellular communication network 10 is possible (step 200). Note that determining whether communication is possible does not have to be done as a special step. Instead, such a determination can be made by the node whenever the wireless device 16-1 has to communicate with a base station 14, or vice versa, for any reason. The determination of whether communication is possible can be based on, for example, whether such communication meets a required Quality of Service (QoS) objective. In other words, communication is determined to be possible if the required QoS objective is met, and communication is determined not to be possible if the required QoS objective is not met. The QoS objective can include, for example, one or more of:
• a minimum RSRP threshold such that the QoS target is not met if the RSRP is below the minimum RSRP threshold, • a minimum RSRQ threshold such that the QoS target is not met if the RSRQ is below the minimum RSRQ threshold, • a minimum Channel Quality Indication (CQI) threshold such that the QoS objective is not met if CQI is below the minimum CQI threshold, • a power threshold received from Uplink Reference Bands (UL) such that the QoS objective is not satisfied if UL audible reference signals are below a threshold, • a Signal Ratio for Interference plus UL Noise (SINR) threshold such that the QoS objective is not satisfied if the SINR is UL is below the UL SINR threshold, • a Downlink SINR threshold (DL) such that the QoS objective is not met if the DL SINR is below the DL SINR threshold, • a time window of synchronization such that the order of
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QoS is not satisfied if synchronization for the Primary Synchronization Sequence (PSS), synchronization for the Secondary Synchronization Sequence (SSS), and / or cell identifier (ID) acquisition is not done within a time period defined by the window of synchronization time, • a threshold of unsuccessful radiolocation attempts such that the QoS goal is not met if (on the cellular communication network side 10) a number, N, of unsuccessful radiolocation attempts for the wireless device 16 -1 exceeds the threshold of unsuccessful radiolocation attempts, • a threshold of unsuccessful random access attempts such that the QoS goal is not met (on the wireless device side 161) if a number, K, of unsuccessful random access attempts wireless device 16-1 exceeds the threshold of unsuccessful random access attempts, • Bit Error Rate (BER) threshold such that the QoS objective is not met if BER is above the BER threshold, • a Block Error Rate (BLER) threshold such that the QoS objective is not met if BLER is above the BLER threshold, • a threshold Internet Protocol (IP) packet delay such that the QoS objective is not met if the IP packet delay is above the IP packet delay threshold, and • an IP packet loss threshold such that the QoS goal is not met if IP packet loss is above the IP packet loss threshold.
[0057] Note that the thresholds for the QoS objective can be static (for example, standardized) or are configurable by the cellular communication network 10.
[0058] Also, in addition to the criteria given above for the purpose of
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QoS, the QoS objective may furthermore include a target packet delay and a target error packet loss for a corresponding QoS class. More specifically, LTE standards define several classes of QoS, each having a corresponding required QoS objective specified in terms of a targeted packet delay and a targeted error packet loss (for example, Class 9 QoS has a level of priority of 9, a maximum required packet delay of 300 milliseconds (ms), and a maximum required packet error rate of 10 ' ⁶ packets (ie 1 packet lost every 1 million packets). target packet delay and target error packet loss for a corresponding QoS class of the wireless device 16-1 can also be used for the QoS objective. Note that the QoS objective is just an example. Additional or others can be used to determine whether communication between wireless device 16-1 and cellular communication network 10 is possible.
[0059] If the node determines that communication between wireless device 16-1 and cellular communication network 10 is possible, the node decides that wireless device 16-1 is to operate in the normal mode of operation (step 202). At that time, the node can, if necessary, disable the one or more long-range extension mechanisms in relation to the wireless device 16-1, as discussed above in relation to Figure 2. Conversely, if the node determines that communication between the wireless device 16-1 and the cellular communication network 10 is not possible, the node decides that the wireless device 16-1 is to operate in the long range extension operation mode (step 204). At that time, the node can trigger one or more long-range extension mechanisms in relation to the wireless device 16-1, as discussed above in relation to Figure 2. Note that the process in Figure 3 can be performed before any other communication between wireless device 16-1 and cellular communication network 10 (for example, a base station 14), or can be performed when a connection between the wireless device
28/53 / 40 wires 16-1 and a radio network node (e.g., a base station 14) on the cellular communication network 10 has already been established. For example, the wireless device 16-1 can be in a triggered state having a triggered radio interconnection session (for example, for LTE, state RRC_CONNECTED) or in a disabled state having no triggered radio interconnection session (for example, for LTE, RRCJDLE).
[0060] Figure 4 illustrates a process by which a node determines whether, in this example, the wireless device 16-1 is to operate in the long-range extension mode or in the normal mode according to another mode of the present exposure. While not limited to this, the process in Figure 4 can, in one embodiment, be used for step 100 in Figure
2. Again, the node performing the process in Figure 4 can be wireless device 16-1 or a network node (for example, service base station 14 of wireless device 16-1). This process is similar to that in Figure 3, but where an additional Received Signal Strength (RSS) check is performed additionally before deciding that the wireless device 16-1 is to operate in the long range extension mode [0061] First , the node determines whether communication between wireless device 16-1 and cellular communication network 10 is possible, as discussed above in relation to step 200 of Figure 3 (step 300). If the node determines that communication between wireless device 16-1 and cellular communication network 10 is possible, the node decides that wireless device 16-1 is to operate in the normal mode of operation (step 302). At that time, the node can, if necessary, disable the one or more long-range extension mechanisms in relation to the wireless device 16-1, as discussed above in relation to Figure 2. Conversely, if the node determines that communication between wireless device 16-1 and cellular communication network 10 is not possible, the node determines whether RSS measured in at least one
29/53 / 40 of the uplink or downlink direction is less than a predefined threshold RSS (step 304). The predefined threshold RSS can either be static or configured by the cellular communication network 10.
[0062] If the RSS is not less than the RSS threshold, then the node decides that the wireless device 16-1 is to operate in the normal operating mode (step 302). At that point, the node can, if necessary, disable one or more long-range extension mechanisms in relation to the wireless device 16-1, as discussed above in relation to Figure 2. However, if the RSS is less than the threshold of RSS, the node decides that the wireless device 16-1 is to operate in the long-range extension operation mode (step 306). At that time, the node can trigger one or more long-range extension mechanisms in relation to the wireless device 16-1, as discussed above in relation to Figure 2.
[0063] Figure 5 illustrates a process by which a node determines whether, in this example, communication between the wireless device 16-1 and the cellular communication network 10 is possible according to a present display modality. While not being limited to this, the process in Figure 5 can, in one embodiment, be used for step 200 in Figure 3 or step 300 in Figure 4. Again, the node that performs the process in Figure 5 can be the device without wires 16-1 or a network node (for example, service base station 14 of wireless device 16-1). Also, note that the ordering of the steps in Figure 5 is not important. In other words, the various criteria can be checked in any desired order. In addition, not all steps can be performed. Specifically, the determination of whether communication is possible, and as such if the wireless device 16-1 is to operate in the long-range extension mode, it can be done based on any one or more of the criteria indicated in Figure 5.
[0064] As illustrated, the node determines whether RSRP of a predefined number (statically defined or configured by the communication network
30/53 / 40 cell 10), N, of stronger cells in wireless device 16-1 are all less than a predefined RSRP threshold (statically defined or configured by cell communication network 10) (step 400). In this case, the node determines that the wireless device 16-1 is to operate in the long-range extension mode (step 402). At that time, the node triggers one or more long-range extension mechanisms in relation to the wireless device 16, as discussed above. Note that, in relation to the modality of Figure 4, the node can also check RSS before making the decision that the wireless device 16-1 is to operate in the long range extension mode.
[0065] If RSRP measured from the predefined number, N, of strongest cells in wireless device 16-1 is not all less than a predefined RSRP threshold, the node determines whether multiple Random Access (RA) attempts failed by the device without wires 16-1 is greater than a predefined threshold of AR attempts (step 404). In this case, the node determines that the wireless device 16-1 is to operate in the long-range extension mode (step 402). At that time, the node triggers one or more long-range extension mechanisms in relation to the wireless device 16, as discussed above. Note that, in relation to the modality of Figure 4, the node can also check RSS before making the decision that the wireless device 161 is to operate in the long-range extension mode.
[0066] If the number of unsuccessful RA attempts by the wireless device 16-1 is not greater than the default RA attempt threshold, the node determines whether a period of time since transmission of the last (current) scheduling request by the wireless device 16-1 exceeds a predefined schedule request threshold delay (step 406). In this case, the node determines that the wireless device 16 is to operate in the long-range extension mode (step 402). At that time, the node triggers one or more long-range extension mechanisms in relation to the wireless device 16, as discussed above. Note that in relation to
31/53 / 40 modality of Figure 4, the node can also check RSS before making the decision that the wireless device 16-1 is to operate in the long range extension mode. If the time period elapsed since transmission of the last (current) schedule request by the wireless device 16-1 does not exceed the predefined schedule request delay threshold, the node determines that the wireless device 16 is to operate in normal mode (step 408).
[0067] In one example, values for the RSRP threshold, N, RA attempt threshold, and schedule request delay threshold are -120 Decibel-Milliwatt (dBm), 1, 10, and 100 ms, respectively. However, these are just examples. Other values can be used. Also, the value for the schedule request threshold delay can be significantly higher than the value of a timer that is typically launched when a schedule request is transmitted by wireless device 16, which is typically in the order of 5- 10 ms. In addition, this period could correspond to more than one scheduling request.
[0068] Figure 6 illustrates a process by which the wireless device 16-1, when entering long-range extension mode, attempts random access or program request transmission using radio resources dedicated to long-range operation mode reach according to a modality of the present exposure. As illustrated, the wireless device 161 enters the long-range extension operation mode (step 500). The wireless device 16-1 can enter the extended range operating mode by determining itself that the wireless device 16-1 is to operate in the extended range mode using one of the processes in Figures 2 through 5 or receiving instructions to enter the long-range extension mode of the cellular communication network 10 (for example, service base station 14 of the wireless device 16-1). Upon entering long-range extension mode, the next time to access cellular communication network 10, wireless device 16-1 attempts random access
32/53 / 40 and / or scheduling request transmission (for example, an uplink scheduling request) using specific radio resources (ie, time and / or frequency resources such as physical resource blocks and / or time intervals) dedicated to the long range extension mode (step 502). The radio resources dedicated to random access or program request transmissions for long-range extension mode are different from the radio resources used for random access and program request transmissions in normal mode.
[0069] Figure 7 illustrates a process that is similar to that of Figure 6, but where the cellular communication network 10 signals the radio resources for random access attempts and signal request transmissions to the wireless device 16-1 according to a modality of the present exhibition. As illustrated, a base station 14 (i.e., service base station 14) of wireless device 16-1 signals the radio resources (or more specifically, information indicative of radio resources) dedicated for random access and / or requests programming for the long range extension mode for the 16-1 wireless device (step 600). Signaling can be, for example, broadcast signaling for all or essentially all wireless devices 16 in a cell, broadcast signal intended only for wireless devices 16 operating or to be operating in long-range extension mode, dedicated signaling for any wireless device 16, or dedicated signaling specifically for wireless devices 16-1 when operating in long-range extension mode. Alternatively, radio resources dedicated to random access and / or programming requests for the long-range extension mode can be statically defined (for example, standardized) or provided to the wireless device 16-1 with subscription information. Note that subscription information can be obtained by wireless device 16-1 when wireless device 16-1 is connected via
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27/40 the first time or when the wireless device 16-1 is first installed in the cell. Alternatively, the subscription information can be stored on the wireless device 16-1. At some point, the wireless device 16-1 enters long-range extension mode (step 602). The wireless device 16-1 then attempts to RA or transmit program request using the radio resources signaled in step 600 (step 604).
[0070] Figure 8 illustrates a process by which a network node determines whether the wireless device 16-1 is to operate in the long range extension mode or in the normal mode according to a present exposure modality. This process is particularly well suited for a network node and even more particularly well suited for a radio access node (e.g., service base station 14 of wireless device 16-1). This process can be used, for example, in step 100 in Figure 2 or step 200 in Figure 3. Note that the ordering of the steps in Figure 8 is not important. In other words, the various criteria can be checked in any desired order. In addition, not all steps can be performed. Specifically, the determination of whether the wireless device 161 is to operate in the long range extension mode can be made based on any one or more of the criteria indicated in Figure 8.
[0071] As illustrated, the network node determines whether no response has been received from wireless device 16-1 after a number, M, of uplink programming grants transmitted to wireless device 16-1 (step 700). In this case, the network node determines that the wireless device 16-1 is to operate in the long-range extension mode (step 702). At that time, the one or more long-range extension mechanisms are triggered in relation to the wireless device 16-1, as discussed above. Otherwise, the network node determines if no response was received from the wireless device 16-1 after a number, L, of requests
34/53 / 40 radiolocation for wireless device 16-1 (step 704). In this case, the node determines that the wireless device 16-1 is to operate in the long-range extension mode (step 702). At that time, the one or more long-range extension mechanisms are triggered in relation to the wireless device 16-1, as discussed above. Otherwise, the network node determines whether an RSS for any transmitted message, either data, uplink pilots, or uplink LI signaling (for example, Physical Uplink Control Channel (PUCCH)), transmitted on the uplink wireless device 16-1 is below a predefined uplink RSS threshold (step 706). In this case, the network node determines that the wireless device 16-1 is to operate in the long-range extension mode (step 702). At that time, the one or more long-range extension mechanisms are triggered in relation to the wireless device 16-1, as discussed above. Otherwise, the network node determines that the wireless device 16-1 is to operate in normal mode (step 708). As an example, the values of M, L, and the uplink RSS threshold are 10, 10, and -120 dBm, respectively. Note that, in one mode, the network node permanently or continuously executes the process in Figure 8.
[0072] Figure 9 illustrates the operation of a base station 14 to determine that the wireless device 16-1 is to operate in the long range extension mode and then order, or command, the wireless device 16-1 to make so according to a present exhibition mode. As illustrated, base station 14 determines that wireless device 16-1 is to operate in long-range extension mode (step 800). In one embodiment, base station 14 uses the process in Figure 8 to make the determination in step 800. Base station 14 then sends a request to wireless device 16-1 for wireless device 16-1 to operate in extension mode long-range (step 802). It is noted here that considering that the
35/53 / 40 base station 14 is aware of the need to use long range extension techniques when communicating with the wireless device 16-1, so this signaling from step 802 is done using these specific techniques, such as example repetitions, etc. In one embodiment, the request is a Radio Resource Control (RRC) message that, in some embodiments, includes values for one or more parameters to be used by the wireless device 16-1 when operating in long-range extension mode . Values can include values for one or more parameters used for long-range extension mechanisms (for example, values indicative of uplink and / or downlink resources to be used for a specific operation, a value indicative of a PUCCH format in terms of modulation and coding, values indicative of modulation and coding schemes to be used, maximum number of downlink and / or uplink repetitions to be applied, etc.), values indicative of dedicated radio resources for random access and / or programming requests in the long-range extension operation mode, values for Radio Interconnection Monitoring (RLM) and / or Radio Interconnection Failure (RLF) and recovery, or similar. In one embodiment, the values in the RRC message can include a value that represents one of several different levels of extended coverage to be used for the long-range extension mode. This value can then be associated with one or more values for one or more parameters for the long-range extension operation mode. The mapping between each extended coverage level and the values for the parameters for the long-range extension operation mode for that extended coverage level can be statically defined (for example, standardized) or included in other RRC messages.
[0073] The request (for example, a DL RRC message) is transmitted in such a way that it can be received by wireless devices 16
36/53 / 40 requiring extended coverage. For example, the same DL RRC message can be repeated enough times to allow for a combination of energy from subsequent repetitions on the wireless device 16-
1. Such signaling can be transmitted using, for example, a dedicated signaling radio bearer using a wireless device-specific communication link or a broadcast channel designed for extended coverage. In response to the request, the wireless device 16-1 then operates in the long-range extension mode (step 804).
[0074] Figure 10 illustrates an example of a RRC message that can be used as the request in step 802 of Figure 9 according to an embodiment of the present exhibition. As illustrated, the RRC message includes an Information Element (IE) that includes values for various parameters to be used by the wireless device 16-1 when operating in long-range extension mode. In this example, the RRC message includes a value that is indicative of a radio resource to be used by the wireless device 16-1 for random access attempts when operating in long-range extension mode (RA resource: PRB # 8) TTI: NX6 (ie every 6 TTI should be used for random access), a maximum number of repetitions of downlink (maximum number of DL reps: 100), a frequency of RLM (ie, frequency with which the wireless device 16-1 monitors the quality of the radio interconnection) (RLM Frequency: 10 Transmission Time Intervals (TTIs)), a value for an N310 counter (N310: 100), etc. Note, however, that the values and parameters shown in Figure 10 are examples only.
[0075] In some embodiments, some of the wireless devices 16 can be stationary devices (e.g., a stationary MTC device). In addition, these stationary devices can be in locations that are within known cover holes that are determined, for example, by drive tests. In one mode,
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31/40 wireless devices 16 which are both stationary and located within known cover holes always operate in long-range extension mode. In this regard, Figure 11 illustrates the operation of the cellular communication network 10 in which the wireless device 16-1 is stationary and located within a cover hole and, as a result, permanently, or always, operates in the extension mode. long-range according to the present mode of exposure.
[0076] As illustrated, wireless device 16-1 either obtains information that is indicative of wireless device 16-1 being stationary and located within a known cover hole or determines that wireless device 16-1 is both stationary and located inside a cover hole (a known or previously unknown cover hole) (step 900). The wireless device 16-1 can be preconfigured to know that it is stationary or can determine that it is stationary, for example, by monitoring its location or short-term averages of received signal strength as characterized by link quality information. The 16-1 wireless device can use any satisfactory technique to determine its location (for example, a Global Positioning System (GPS) receiver, help from other wireless devices 16, or similar). In addition, low mobility (for example, being stationary) may be based on low variability in short-term averages of the received signal power as characterized by link quality information for the wireless device 16-1 (for example, RSRP, RSRQ, and / or SINR). Other parameters can be used to detect that the wireless device 16 is stationary (or has low mobility) such as, for example, speed, Doppler shift, etc. Information that identifies known coverage holes can be communicated to the wireless device 16-1 of the cellular communication network 10. Alternatively, the wireless device 16-1 can determine that it is
38/53 / 40 located in a cover hole based on, for example, any of the parameters discussed above to determine when communication between wireless device 16-1 and cellular communication network 10 is not possible.
[0077] Once the wireless device 16-1 knows that it is stationary (or has sufficiently low mobility) and located in a cover hole, the wireless device 16-1 is configured to operate permanently in long extension mode reach (step 902). More specifically, the wireless device 16-1 is configured to use one or more long-range extension mechanisms, radio resources dedicated to long-range extension mode, etc., as discussed above. The wireless device 16-1 then communicates with the base station 14 in the long range extension mode (step 904).
[0078] Figure 12 illustrates a process by which the cellular communication network 10 forces the wireless device 16-1 out of the long range extension mode according to a present exposure mode. Forcing the wireless device 16-1 out of the long range extension mode may be desirable when, for example, the cellular communication network 10 does not allow long range operation mode or the cellular communication network 10 has determined that admitting wireless device 161 to enter long-range extension mode would impact system capacity. This can be configured, for example, during certain hours of the day when traffic on the system is high. As illustrated, base station 14 sends a message to wireless device 16-1 to force wireless device 16-1 out of the long-range extension operation mode (step 1000). Note that, instead of sending the message in step 1000, cellular communication network 10 can perform other actions that force wireless device 16-1 out of the long range operation mode. Such actions include, but are not limited to, ceasing to provide
39/53 / 40 signals and / or repetition of signals that are required for operation in long-range extension mode. In response, wireless device 16-1 determines that it is to operate in normal mode (step 1002) and therefore operates in normal mode, as described above (step 1004).
[0079] Figure 13 illustrates a process by which, in this example, the wireless device 16-1 selects values for parameters for the long-range extension operation mode based on a degree of difficulty in establishing communication between the wireless device 16-1 and the cellular communication network 10 according to a modality of the present exposure. As illustrated, wireless device 16-1 determines that wireless device 16-1 is for operating the long-range extension mode using, for example, any of the processes described above (step 1100). The wireless device 16-1 then selects values for one or more parameters for the long-range extension mode as a function of a degree of difficulty in establishing a radio interconnection (ie, communication) between the wireless device 16- 1 and a radio network node (e.g., a base station 14) on the cellular communication network 10 (step 1102). As non-limiting examples, the degree of difficulty in establishing a radio interconnection can be measured in terms of one or more of: the RSS of a service cell measured by the wireless device 16-1; the ability of the wireless device 16-1 to detect a cell based on a sync signal with a specific probability of successful detection; the ability of the wireless device 16-1 to receive fused radio information, for example, a Master Information Block (MIB) and a System Information Block 1 (SIB1); and the number of random access attempts, or the type of random access procedure used, when wireless device 16-1 successfully connects to the cellular communication network 10.
[0080] Based on the degree of difficulty in establishing the interconnection
40/53 / 40 radio, the wireless device 16-1 can then select, for example, values for one or more parameters to be used in the long range extension mode, for example, values for one or more parameters to be used. used or proposed to be used in one or more long-range extension mechanisms such as, for example, increased transmit power, increased amount of reference signal resources, decreased code rate, and increased number of repetitions to be used in data transmissions. These parameter values can apply to both uplink and downlink transmissions, possibly with different values for each direction. Parameter values to be applied to the wireless device 16-1 can be made autonomously by the wireless device 16-1, while parameter values to be used or proposed to be used by the network node can be signaled to the communication network. cell 10, for example, in an RRC message. Some of the parameters in addition can refer to settings of transmitter, other parameters can refer to settings of receiver, and still other parameters can refer to both settings of transmitter and receiver. The wireless device 16-1 then operates in the long range extension mode according to the values selected for the parameters in step 1102 (step 1104).
[0081] Figure 14 illustrates a process that is similar to that of Figure 13, but where a network node, which in this example is a base station 14, selects values for parameters for the long-range extension mode according to another mode of present exposure. As illustrated, the base station 14 determines that the wireless device 16-1 is to operate the long-range extension mode using, for example, any of the processes described above (step 1200). Base station 14 then selects values for one or more parameters for the long-range extension mode as a function of a degree of difficulty in establishing a radio interconnection (ie, communication) between wireless device 16-1 and
41/53 / 40 a radio network node (e.g., a base station 14) on the cellular communication network 10 (step 1202). As non-limiting examples, the degree of difficulty in establishing a radio interconnection can be measured in terms of one or more of: the RSS of a service cell (for example, the base station cell 14) measured by the wireless device 16 -1; the RSS of wireless device 16-1 measured by base station 14; the ability of the wireless device 16-1 to detect a cell based on a sync signal with a specific probability of successful detection; the ability of the wireless device 16-1 to receive broadcast information, for example, the MIB and SIB1; and the number of random access attempts, or the type of random access procedure used, when wireless device 16-1 successfully connects to the cellular communication network 10.
[0082] Based on the degree of difficulty in establishing the radio interconnection, base station 14 can then select, for example, values for one or more parameters to be used or proposed to be used in the long-range extension mode, for example example, values for one or more parameters to be used in one or more long-range extension mechanisms such as increased transmission power, increased amount of reference signal resources, decreased code rate, and increased number of repetitions to be used in data transmissions. These parameter values can apply to both uplink and downlink transmissions, possibly with different values for each direction. Some of the parameters in addition can refer to settings of transmitter, other parameters can refer to settings of receiver, and still other parameters can refer to settings of transmitter and receiver. The base station 14 then sends a request to the wireless device 161 to operate in the long-range extension mode (step 1204). In some embodiments, the order includes some or all of the values
42/53 / 40 selected by base station 14 for the parameters for the long-range extension operation mode. Notably, the selected values may include selected values to be applied to base station 14 (for example, for parameters for long-range extension mode mechanisms performed by base station 14), selected values to be applied to wireless device 16-1 (for example, for parameters for long-range extension mechanisms performed by the wireless device 16-1), and / or selected values to be applied to the wireless device 16-1 (for example, for parameters for mode mechanisms range extensions performed by the wireless device 161). In response to the request, the wireless device 16-1 then operates in the long range extension mode according to the values selected for the parameters in step 1202 (step 1206).
[0083] Figure 15 is a block diagram illustrating a node 20 configured to operate according to one or more of the embodiments exposed here. Node 20 is specifically a wireless node, for example, one of the wireless devices 16 or a radio network node such as, for example, one of the base stations 14. As illustrated, node 20 includes a wireless interface 22 (for example, transceiver circuits) and one or more control and processing circuits 24. Where node 20 includes a radio network node as a base station 14, node 20 may further include one or more other communication interfaces 26 (for example, to connect to other network nodes). Where node 20 includes a wireless device 16, node 20 may furthermore include a sensor 28 for reporting data indicating, for example, a temperature, wind speed, or humidity.
[0084] Wireless interface 22 may include various radio frequency components to receive and process radio signals from one or more other wireless nodes (for example, wireless devices 16 and / or base stations 14 depending on the mode), using techniques signal processing
43/53 / 40 known. The one or more control and processing circuits 24 may include one or more microprocessors, digital signal processors, and the like. The one or more control and processing circuits 24 may also include other digital hardware and a memory (for example, Read-Only Memory (ROM), Random Access Memory (RAM), 'cache', 'flash' memory, etc. ) which stores program code to execute one or more communication protocols and to execute one or more of the previous techniques. Regardless, the one or more control and processing circuits 24 are configured such that node 20 operates according to one or more of the previously described embodiments. As shown, for example, the one or more control and processing circuits 24 may include one or more control / signaling circuits 30 configured to perform some or all of the steps of one or more of the processes set forth herein.
[0085] In any of the embodiments described previously, the decision to communicate, or operate, in the normal mode or in the long-range extension mode can be reassessed on a regular or periodic basis. As an example, an indication that triggers re-evaluating the decision to operate in normal mode or in long-range extension mode can be mobility detection of the wireless device 16 either to a network node or to the wireless device 16.
[0086] As those of ordinary skill in the art should appreciate, the characteristics of the aforementioned embodiments can be used separately, or combined in multiple ways. For example, it is possible for one mode to be performed on the wireless device 16, and another mode to be performed simultaneously on a network node.
[0087] The concepts exposed here can be executed in ways other than those specifically published here without starting from essential characteristics of the exhibition. Therefore, the exposed embodiments
44/53 / 40 here are to be considered in all respects as illustrative and
non-restrictive, and all , changes coming within the meaning and range of
equivalence of the appended claims are intended to be covered therein.
[0088] Some implementations of the embodiments of the present exhibition provide advantages and benefits that conventional systems cannot provide. However, the embodiments set out here are not limited to any particular advantage. As an example, embodiments set out here enable the operation of wireless devices 16 in extended range conditions compared to existing wireless systems by providing systems and methods for switching between normal operation and extended range operation. As a result, minimizing auxiliary signaling data and minimizing energy consumption within these wireless devices 16 is achieved.
[0089] The following acronyms are used throughout this exhibition.
• 3GPP Society Project 3 Generation • ASIC Application Specific Integrated Circuit • BER Bit error rate • BLER Block error rate • dB Decibel • dBm Decibel-Milliwatt • CQI Channel Quality Indication • D2D Device to Device • DL Downlink • EGPRS Enhanced General Packet Radio Service • eNB Evolved B node ® FDD Frequency Division Duplexing • GPRS General Package Radio Service • GPS Global Positioning System
45/53 / 40
• GSM Global System for Mobile Communications • ID Identifier • IE Information Element • IP Internet Protocol • Kbps Kilobits per Second • LTE Long Term Evolution • M2M Machine to Machine • MIB Master Information Block • MME Mobility Administration Entity • ms Millisecond • TCM Machine Type Communication «PSS Primary Sync Sequence
• PUCCH Physical Uplink Control Channel
• QoS Service quality • RA Random Access • RAM Random Access Memory • RAN Radio Access Network • RLF Radio Interconnection Failure • RLM Radio Interconnection Monitoring • ROM Read-Only Memory • RRC Radio Resource Control «RSRP Received Reference Signal Power • RSRQ Reference Signal Quality Received • RSS Signal Strength Received • SAE Evolution of System Architecture «SIB System Information Block • SID Study Item Description • SINR Signal Ratio for Interference plus
Noise
46/53 / 40
• sss Secondary Sync Sequence «TDD Frequency Division Duplexing • TR Technical report «TS Technical specification • TTI Transmission Time Interval "HUH User Equipment • UL Uplink [0090] Those skilled in the art will recognize improvements and
modifications to the preferred embodiments of the present exhibit. All such improvements and modifications are considered within the scope of the concepts set out here and in the claims that follow.

权利要求:
Claims (15)
[1]
1. Method of operation of a node (20) in a cellular communication network (10), comprising:
determining that a wireless device (16) is to operate in a long-range extension operation mode if it is difficult to establish communication between the wireless device (16) and the cellular communication network (10); and if the wireless device (16) is to operate in the long-range extension operation mode, operate one or more long-range extension mechanisms such that the wireless device (16) operates in the long-range operation mode reach, the method being characterized by the fact that the difficulty in establishing communication between the wireless device (16) and the cellular communication network (10) is a difficulty in establishing at least one of a group consisting of: an uplink from the wireless device (16) to the cellular communication network (10) and a downlink from the cellular communication network (10) to the wireless device (16).
[2]
2. Method according to claim 1, characterized by the fact that the one or more long-range extension mechanisms comprise one or more long-range extension mechanisms for a downlink from a base station (14) in the network cellular communication (10) to the wireless device (16).
[3]
Method according to claim 1, characterized in that the one or more long-range extension mechanisms comprise one or more long-range extension mechanisms for an uplink of the wireless device (16) to a station base (14) in the cellular communication network (10).
[4]
4. Method according to any one of claims 1 to 3, characterized by the fact that the one or more extension mechanisms
48/53
2/6 long range comprise at least one of a group consisting of: use of a high transmission power that facilitates the difficulty in establishing communication between the wireless device (16) and the cellular communication network (10), use of an increased amount of reference signal resources that facilitate the difficulty in establishing communication between the wireless device (16) and the cellular communication network (10), use of one or more modified repetition schemes that facilitate the difficulty in establish communication between the wireless device (16) and the cellular communication network (10), use of one or more programming restrictions that facilitate the difficulty in establishing communication between the wireless device (16) and the communication network of cellular (10), use of one or more modulation and coding schemes that facilitate the difficulty in establishing communication between the wireless device (16) and the communication network cell phone (10), use of one or more synchronization signals that facilitate the difficulty in establishing communication between the wireless device (16) and the cellular communication network (10), and use of random access resources that facilitate the difficulty in establishing communication between the wireless device (16) and the cellular communication network (10).
[5]
Method according to any one of claims 1 to 4, characterized by the fact that it further comprises determining that there is difficulty in establishing communication between the wireless device (16) and the cellular communication network (10) when:
communication between the wireless device (16) and the cellular communication network (10) is not possible in a normal mode of operation; and an incoming signal strength with respect to the wireless device (16) is less than or equal to a predefined threshold received signal strength.
[6]
6. Method according to any one of claims 1 to
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3/6
4, characterized by the fact that it additionally comprises determining that there is difficulty in establishing communication between the wireless device (16) and the cellular communication network (10) when one of the following takes place:
measurements of Received Reference Signal Power, RSRP, for a number, N, of stronger cells made by the wireless device (16) are each less than a predefined threshold RSRP;
a number of unsuccessful random access attempts by the wireless device (16) are greater than a predefined threshold number of random access attempts;
an amount of time that has elapsed since a time when the wireless device (16) transmitted a last schedule request without receiving a schedule request grant exceeds a predefined threshold schedule request delay.
[7]
Method according to any one of claims 1 to
6, characterized by the fact that, additionally:
if the wireless device (16) is to not operate in the long-range extension operating mode, disable one or more long-range extension mechanisms such that the wireless device (16) operates in a normal operating mode, where optionally:
the wireless device (16) deactivates one or more long-range extension mechanisms in response to signaling by a network node of the cellular communication network (10) that forces the wireless device (16) out of operating mode long-range extension cord and in normal operating mode.
[8]
8. Method according to any one of claims 1 to
7, characterized by the fact that the node (20) is the wireless device (16), and the method further comprises, if the wireless device (16) is to operate in the long-range extension operation mode, one of the following:
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4/6 attempt a random access using one or more features dedicated to the long-range extension operation mode;
attempt a schedule request transmission using one or more features dedicated to the long-range extension operation mode.
[9]
9. Method according to any one of claims 1 to 8, characterized by the fact that:
node (20) is a network node; and triggering one or more long-range extension mechanisms comprises one of the following:
signaling information to the wireless device (16) that is indicative of at least one of a group consisting of: one or more radio resources dedicated to random access attempts in the long-range extension operation mode and one or more dedicated radio for uplink programming requests in long-range extension operation mode;
transmitting a request to the wireless device (16) for the wireless device (16) to operate in the long-range extension operation mode.
[10]
10. Method according to any one of claims 1 to 8, characterized by the fact that:
the node (20) is the wireless device (16);
the method further comprises receiving information that is indicative of at least one of a group consisting of: one or more radio resources dedicated to random access attempts in the long-range extension operation mode and one or more radio resources dedicated to uplink programming requests in long-range extension operation mode; and trigger one or more long-term extension mechanisms
51/53
5/6 range comprises triggering the use of at least one of the group consisting of: the one or more radio resources dedicated to random access attempts in the long-range extension operation mode and the one or more radio resources dedicated to requests uplink programming in long-range extension operation mode.
[11]
11. Method according to any one of claims 1 to 10, characterized by the fact that:
node (20) is a network node; and the method further comprises determining that it is difficult to establish communication between the wireless device (16) and the cellular communication network (10) when one of the following takes place:
no response is received from the wireless device (16) after the network node has sent a predefined number of uplink scheduling grants to the wireless device (16);
no response is received from the wireless device (16) after the network node has sent a predefined number of call requests to the wireless device (16);
received signal strength for an uplink from the wireless device (16) on the network node is less than a predefined uplink received signal strength;
when the wireless device (16) is stationary and within a coverage hole within a coverage area of the cellular communication network (10).
[12]
12. Method, according to claim 1, characterized by the fact that:
node (20) is a network node; and the method further comprises subsequently forcing the wireless device (16) to disable the one or more long-range extension mechanisms such that the device without
52/53
6/6 wires (16) enter normal operating mode.
[13]
13. Method according to claim 1, characterized by the fact that it further comprises selecting one or more parameters for the long-range extension operation mode as a function of a level of difficulty in establishing communication between the communication network cell phone (10) and the wireless device (16).
[14]
14. Node (20) in a cellular communications network (10), comprising:
a wireless interface (22); and one or more control and processing circuits (24) associated with the wireless interface (22) and configured to:
determining that a wireless device (16) is to operate in a long-range extension operation mode if it is difficult to establish communication between the wireless device (16) and the cellular communication network (10); and if the wireless device (16) is to operate in the long-range extension operation mode, operate one or more long-range extension mechanisms such that the wireless device (16) operates in the long-range operation mode long range, characterized by the fact that the difficulty in establishing communication between the wireless device (16) and the cellular communication network (10) is a difficulty in establishing at least one of a group consisting of: an uplink of the device wireless (16) for the cellular communication network (10) and a downlink of the cellular communication network (10) for the wireless device (16).
[15]
15. Node (20), according to claim 14, characterized by the fact that it is configured to operate according to the method defined in any of claims 2 to 13.

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同族专利:

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公开号 | 公开日

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US10097990B2|2018-10-09|

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US20180359631A1|2018-12-13|

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EP2921007B1|2020-03-04|

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DK2921007T3|2020-06-02|

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US20150092566A1|2015-04-02|

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PL2921007T3|2020-08-24|

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PT2921007T|2020-04-22|

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ES2782508T3|2020-09-15|

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WO2014077765A1|2014-05-22|

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US10757565B2|2020-08-25|

---

EP2921007A1|2015-09-23|

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US20200351641A1|2020-11-05|

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RU2606398C1|2017-01-10|

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法律状态:
2018-11-21| B06F| Objections, documents and/or translations needed after an examination request according [chapter 6.6 patent gazette]|

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2020-07-14| B15K| Others concerning applications: alteration of classification|Free format text: A CLASSIFICACAO ANTERIOR ERA: H04W 52/50 Ipc: H04W 52/50 (2009.01), H04W 8/22 (2009.01), H04W 24 |

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2021-10-13| B350| Update of information on the portal [chapter 15.35 patent gazette]|

优先权:

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US201261725951P| true| 2012-11-13|2012-11-13|

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PCT/SE2013/051334|WO2014077765A1|2012-11-13|2013-11-13|Method and apparatus for triggering of specific operation mode for terminals operating in extended long range|

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