WO2019157664A1 - Procédé et appareil de sélection de ressources pour la récupération de défaillance de faisceau, et système de communication - Google Patents

Procédé et appareil de sélection de ressources pour la récupération de défaillance de faisceau, et système de communication Download PDF

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Publication number
WO2019157664A1
WO2019157664A1 PCT/CN2018/076734 CN2018076734W WO2019157664A1 WO 2019157664 A1 WO2019157664 A1 WO 2019157664A1 CN 2018076734 W CN2018076734 W CN 2018076734W WO 2019157664 A1 WO2019157664 A1 WO 2019157664A1
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WIPO (PCT)
Prior art keywords
reference signal
failure recovery
beam failure
terminal device
preamble
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PCT/CN2018/076734
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English (en)
Chinese (zh)
Inventor
贾美艺
宋磊
陈哲
张国玉
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Fujitsu Ltd
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Fujitsu Ltd
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Priority to PCT/CN2018/076734 priority Critical patent/WO2019157664A1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA

Definitions

  • the present invention relates to the field of communications, and in particular, to a resource selection method, apparatus, and communication system for beam failure recovery.
  • the concept of a beam is introduced to support high frequency operation. Beam failure occurs when the quality of the radio link drops suddenly.
  • the NR system proposes a mechanism for autonomous recovery of the terminal device, that is, beam failure recovery.
  • FIG. 1 is an example of a beam failure recovery process. As shown in FIG. 1 , after the terminal device enters the connected state, the network device provides a dedicated configuration for the terminal device (step S0), including:
  • a parameter used to determine beam failure such as NrOfBeamFailureInstance
  • a threshold used to confirm whether a beam is a candidate beam such as CandidateBeam Threshold;
  • BFRR Beam Failure Recovery Request
  • PRACH-resource-dedicated- BFR ra-PreambleIndexConfig-BFR
  • PreambleTransMax-BFR PreambleTransMax-BFR
  • the terminal device transmits a beam failure recovery request in the configured dedicated resource or contention-based resource (step S2), and in the specified receiving window Wait for feedback from network devices on the specified resource location. If the terminal device receives the network response within the configured time (step S3), the beam failure recovery process is considered successful; otherwise, the process is considered to have failed.
  • MAC Medium Access Control
  • the physical layer monitors the beam quality according to the detection resources configured by the network or the detection resources determined by the network. When the quality of all the detected resources is worse than a certain threshold, a failure instance of the beam is determined and reported to the MAC layer.
  • the MAC layer counts the beam failure instances. When a certain number is reached, the beam failure event is determined; the MAC layer notifies the physical layer of the beam failure event;
  • the physical layer determines, according to the request of the MAC layer, a resource whose quality is better than a certain threshold from the resources configured by the network, and provides the resource identifier and the physical layer measurement result to the MAC layer;
  • the MAC layer selects resources and preambles for initiating the beam failure recovery process based on the information provided by the physical layer, and notifies the physical layer;
  • the physical layer waits for possible feedback from the network on resources configured by the network or other specified resources;
  • the MAC layer determines whether the beam failure recovery succeeds or fails based on the maximum number of uplink transmissions, timers, and network feedback.
  • the terminal device After determining that a beam failure event has occurred, the terminal device can perform a beam failure recovery process for beam autonomous recovery. In order to complete the process, the terminal device needs to decide which resource/what is available for which/or which preamble to transmit.
  • the terminal device In the case where multiple resources and/or multiple preambles are available, the terminal device preferentially uses which resource to transmit which preamble.
  • an embodiment of the present invention provides a resource selection method, apparatus, and communication system for beam failure recovery.
  • a resource selection method for beam failure recovery includes:
  • the terminal device sends the random access (RA) preamble associated with the first reference signal by using a radio resource associated with the first reference signal to perform a beam failure recovery process.
  • RA random access
  • a method for configuring beam failure recovery includes:
  • the network device configures, for the terminal device, a first reference signal for beam failure recovery, so that the terminal device sends the RA preamble associated with the first reference signal to perform beam failure by using the radio resource associated with the first reference signal Recovery process.
  • a resource selection device for beam failure recovery is provided, which is configured in a terminal device, where the device includes:
  • a first sending unit configured to send a random access (RA) preamble associated with the first reference signal by using a radio resource associated with the first reference signal to perform a beam failure recovery process.
  • RA random access
  • a device for configuring beam failure recovery is provided, which is configured in a network device, where the device includes:
  • a first configuration unit configured to configure, by the terminal device, a first reference signal for beam failure recovery, so that the terminal device sends the RA preamble associated with the first reference signal by using a radio resource associated with the first reference signal, For the beam failure recovery process.
  • a terminal device wherein the terminal device comprises the apparatus of the foregoing third aspect.
  • a network device wherein the network device comprises the apparatus of the foregoing fourth aspect.
  • a communication system comprising the network device of the foregoing sixth aspect and the terminal device of the foregoing fifth aspect.
  • a computer readable program is provided, wherein when the program is executed in a terminal device, the program causes a computer to execute the method described in the foregoing first aspect in the terminal device .
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform the method of the first aspect described above in a terminal device.
  • a computer readable program is provided, wherein when the program is executed in a network device, the program causes a computer to perform the method of the foregoing second aspect in the network device .
  • a storage medium storing a computer readable program, wherein the computer readable program causes a computer to perform the method of the aforementioned second aspect in a network device.
  • the beneficial effect of the embodiment of the present invention is that the terminal device can perform the beam failure recovery process by transmitting the random access (RA) preamble associated with the first reference signal by using the radio resource associated with the first reference signal.
  • the first reference signal may be a reference signal configured by the network device for beam failure recovery, whereby the network device can better manage the beam failure recovery.
  • the first reference signal may also be a reference signal other than the reference signal configured by the network device for beam failure recovery, whereby the terminal device can still perform if the wireless environment changes beyond the network device estimation. Beam failure recovery.
  • FIG. 1 is a schematic diagram of a conventional beam failure recovery process
  • FIG. 2 is a schematic diagram of a communication system according to an embodiment of the present invention.
  • Embodiment 3 is a schematic diagram of a resource selection method for beam failure recovery in Embodiment 1;
  • FIG. 4 is a schematic diagram of a configuration method of beam failure recovery in Embodiment 2;
  • FIG. 5 is a schematic diagram of a resource selection apparatus for beam failure recovery of Embodiment 3.
  • FIG. 6 is a schematic diagram of a configuration apparatus for beam failure recovery of Embodiment 4.
  • FIG. 7 is a schematic diagram of a terminal device of Embodiment 5.
  • FIG. 8 is a schematic diagram of a network device of Embodiment 6.
  • the terms “first”, “second”, etc. are used to distinguish different elements from the title, but do not indicate the spatial arrangement or chronological order of the elements, and these elements should not be used by these terms. Limited.
  • the term “and/or” includes any and all combinations of one or more of the associated listed terms.
  • the terms “comprising,” “comprising,” “having,” or “an” are used to distinguish different elements from the title, but do not indicate the spatial arrangement or chronological order of the elements, and these elements should not be used by these terms. Limited.
  • the term “and/or” includes any and all combinations of one or more of the associated listed terms.
  • the term “communication network” or “wireless communication network” may refer to a network that conforms to any communication standard such as Long Term Evolution (LTE), Enhanced Long Term Evolution (LTE-A, LTE- Advanced), Wideband Code Division Multiple Access (WCDMA), High-Speed Packet Access (HSPA), and the like.
  • LTE Long Term Evolution
  • LTE-A Enhanced Long Term Evolution
  • WCDMA Wideband Code Division Multiple Access
  • HSPA High-Speed Packet Access
  • the communication between devices in the communication system may be performed according to any phase of the communication protocol, and may include, for example but not limited to, the following communication protocols: 1G (generation), 2G, 2.5G, 2.75G, 3G, 4G, 4.5G, and future. 5G, New Radio (NR), etc., and/or other communication protocols currently known or to be developed in the future.
  • the term "network device” refers to, for example, a device in a communication system that accesses a terminal device to a communication network and provides a service for the terminal device.
  • the network device may include, but is not limited to, a device: a base station (BS, a base station), an access point (AP, an Access Point), a transmission and reception point (TRP), a broadcast transmitter, and a mobility management entity (MME, Mobile). Management Entity), gateway, server, Radio Network Controller (RNC), Base Station Controller (BSC), and so on.
  • BS base station
  • AP access point
  • TRP transmission and reception point
  • MME mobility management entity
  • Management Entity gateway
  • server Radio Network Controller
  • BSC Base Station Controller
  • the base station may include, but is not limited to, a Node B (NodeB or NB), an evolved Node B (eNodeB or eNB), and a 5G base station (gNB), and the like, and may further include a Remote Radio Head (RRH). , Remote Radio Unit (RRU), relay or low power node (eg femto, pico, etc.).
  • RRH Remote Radio Head
  • RRU Remote Radio Unit
  • base station may include some or all of their functions, and each base station may provide communication coverage for a particular geographic area.
  • the term "cell” can refer to a base station and/or its coverage area, depending on the context in which the term is used.
  • the term "user equipment” (UE) or “terminal equipment” (TE) refers to, for example, a device that accesses a communication network through a network device and receives a network service.
  • the user equipment may be Fixed or mobile, and can also be called mobile station (MS, Mobile Station), terminal, subscriber station (SS, Subscriber Station), access terminal (AT, Access Terminal), station, and so on.
  • the terminal device may include but is not limited to the following devices: a cellular phone (Cellular Phone), a personal digital assistant (PDA, Personal Digital Assistant), a wireless modem, a wireless communication device, a handheld device, a machine type communication device, a laptop computer, Cordless phones, smart phones, smart watches, digital cameras, and more.
  • a cellular phone Cellular Phone
  • PDA Personal Digital Assistant
  • wireless modem Wireless Fidelity
  • a wireless communication device a handheld device
  • a machine type communication device a laptop computer
  • Cordless phones smart phones, smart watches, digital cameras, and more.
  • the terminal device may be a device or device that performs monitoring or measurement, and may include, but is not limited to, a Machine Type Communication (MTC) terminal.
  • MTC Machine Type Communication
  • network side refers to one side of the network, which may be a certain base station, and may also include one or more network devices as above.
  • user side or “terminal device side” refers to a side of a user or a terminal, which may be a certain UE, or may include one or more terminal devices as above.
  • FIG. 2 is a schematic diagram of a communication system according to an embodiment of the present invention.
  • the terminal device and the network device are exemplarily illustrated.
  • the communication system 200 may include a network device 201 and a terminal device 202.
  • FIG. 2 illustrates only one terminal device and one network device as an example. However, embodiments of the invention are not limited thereto.
  • an existing service or a service that can be implemented in the future can be performed between the network device 201 and the terminal device 202.
  • these services include, but are not limited to, enhanced mobile broadband (eMBB, enhanced Mobile Broadband), massive machine type communication (mMTC), and high-reliability low-latency communication (URLLC, Ultra-Reliable and Low-LatencyCommunication) ,and many more.
  • eMBB enhanced mobile broadband
  • mMTC massive machine type communication
  • URLLC Ultra-Reliable and Low-LatencyCommunication
  • the terminal device 202 can transmit data to the network device 201, for example, using an unlicensed transmission mode.
  • the network device 201 can receive data sent by one or more terminal devices 202 and feed back information (for example, acknowledge ACK/non-acknowledgement NACK) information to the terminal device 202, and the terminal device 202 can confirm the end of the transmission process according to the feedback information, or can further Perform new data transfer or data retransmission.
  • acknowledge ACK/non-acknowledgement NACK for example, acknowledge ACK/non-acknowledgement NACK
  • the embodiment of the invention provides a resource selection method for beam failure recovery.
  • FIG. 3 is a schematic diagram of a resource selection method for beam failure recovery according to an embodiment of the present invention, showing a situation on the terminal device side.
  • the resource selection method 300 for beam failure recovery includes:
  • Step 301 The terminal device sends a random access (RA) preamble associated with the first reference signal by using a radio resource associated with the first reference signal to perform a beam failure recovery process.
  • RA random access
  • the radio resource associated with the first reference signal may be an RA resource dedicated to the terminal device, or may be a RA resource common to multiple terminal devices.
  • the RA preamble associated with the first reference signal may be an RA preamble dedicated to the terminal device, or may be a RA preamble common to a plurality of terminal devices.
  • the radio resource and the RA preamble are both configured by the network device. In this embodiment, the configuration of the radio resource and the RA preamble is not limited.
  • the terminal device sends the random access (RA) preamble associated with the first reference signal by using the radio resource associated with the first reference signal, and the beam failure recovery may be performed in the case of a beam failure.
  • RA random access
  • the first reference signal may be a reference signal configured by the network device for beam failure recovery, whereby the network device may better manage beam failure recovery.
  • the first reference signal may be a synchronization signal block (SSB) configured by the network device by using radio resource control (RRC) signaling for beam failure recovery and the measurement result is better than a preset first threshold.
  • SSB synchronization signal block
  • RRC radio resource control
  • RS reference signal
  • the reference signal may be a channel state information reference signal (CSI-RS) or other cell specific or UE specific reference signal.
  • the first threshold may be set to be the same or may be set to be different.
  • the specific value of the first threshold is not limited.
  • the terminal device may send the dedicated RA resource.
  • the terminal device may use the first reference signal in step 301.
  • the common RA resource transmits a common RA preamble associated with the first reference signal described above for contention based beam failure recovery.
  • the foregoing first reference signal may be a reference signal in a candidate beam reference signal list (candidateBeamRSList) for beam failure recovery configured by the network device by using the RRC signaling, and the candidate beam reference signal list It can be defined as a list of reference signal identifications used to initiate a beam failure recovery process.
  • the network device can configure a list of reference signals for beam failure recovery for the terminal device, in which a portion of the reference signals have a dedicated configuration, ie, associated RA resources and/or RA preambles are associated.
  • the other part of the reference signal does not have the above-mentioned dedicated configuration; the above first reference signal is included in this list.
  • the network device may configure two lists for beam failure recovery, one of which includes only the reference signal having the dedicated configuration described above, and the other list includes only the reference signal that does not have the dedicated configuration described above; the first reference signal is included in One of them is in the list.
  • the candidate beam reference signal list may be defined in a protocol of the MAC layer of the terminal device, for example, may be defined in the MAC layer of the terminal device as: a reference signal corresponding to the candidate beam for beam failure recovery. List.
  • a protocol of the MAC layer of the terminal device it may be described as:
  • CandidateBeamRSList a list of RS corresponding to candidate beams for beam failure recovery.
  • the following content may also be defined in the protocol of the MAC layer of the terminal device: if the random access procedure is initiated by beam failure, and RRC is a reference signal list configured for beam failure recovery (eg, candidate beam reference signal) The measurement result of at least one reference signal in the list is better than the threshold (pre-set first threshold as described above), and a reference signal satisfying the condition is selected to initiate a random access process; otherwise, the beam failure recovery process is considered failure.
  • the protocol of the MAC layer of the terminal device it may be described as:
  • the terminal device may initiate a random access procedure from the reference signal list of the subsequent beam reference signal, which is better than the first threshold, to perform beam failure recovery.
  • the foregoing first reference signal may be a dedicated reference signal of a candidate beam for beam failure recovery configured by the network device through RRC signaling.
  • the following may be defined: The RRC configures a reference signal for a candidate beam for beam failure recovery, and the UE does not allow beam failure recovery on a beam other than the configured reference signal.
  • the physical layer of the terminal device may report the identifier of the first reference signal and the measurement result of the first reference signal to the MAC layer of the terminal device according to the request of the MAC layer of the terminal device. Therefore, the MAC layer may send the RA preamble associated with the first reference signal by using the radio resource associated with the first reference signal to perform random access based on beam failure recovery.
  • the reference signal for beam failure recovery configured by the network device can be used for the beam failure recovery process, and other reference signals, such as reference signals for beam management, are not used for the beam failure recovery process.
  • beam failure recovery can be better controlled by the network side.
  • the first reference signal may also be a reference signal other than the reference signal configured by the network device for beam failure recovery, thereby, if the wireless environment changes beyond the network device estimation, The terminal device is still capable of beam failure recovery.
  • the first reference signal may be a synchronization signal block (SSB) or a reference signal (RS) having available physical layer measurement results and the measurement result is better than a preset second threshold.
  • the reference signal may be a channel state information reference signal (CSI-RS) or other cell specific or UE specific reference signal.
  • the second threshold may be set to be the same or may be set to be different.
  • the specific value of the second threshold is not limited in this embodiment.
  • the network device may also configure a reference signal list for beam failure recovery for the terminal device, and the reference signals in the list all have a dedicated configuration, that is, a dedicated RA resource and/or a dedicated RA preamble are associated.
  • the first reference signal is not in the candidate beam reference signal list for beam failure recovery configured by the network device by using the RRC signaling for the terminal device.
  • the terminal device may send the RA preamble associated with the first reference signal by using the RA resource associated with the first reference signal to perform contention-based beam failure recovery.
  • the first reference signal may be a reference signal configured by the network device for radio resource management (RRM) or for beam management (BM). That is, the above physical layer measurement results may be provided to the MAC layer by the physical layer for RRM or for BM.
  • RRM radio resource management
  • BM beam management
  • the dedicated RA preamble index (ra) -ParambleIndex
  • prach-FreqOffset a dedicated frequency offset
  • rach-resourceMask a dedicated time domain mask
  • the SSB index is selected as the candidate beam identifier, at least one of the three fields of the RA resource/RA preamble related configuration is necessary, otherwise (ie, using the SSB)
  • the other reference signals are associated with the RA resource/RA preamble.
  • the three fields of the RA resource/RA preamble related configuration are optional and can be marked as need R (indicating that when the relevant configuration is not received, the previous Configuration), or marked as need M (indicating that the previous configuration was used when the relevant configuration was not received).
  • the SSBID is used as the identifier of the associated dedicated RA resource/RA preamble, but the associated dedicated RA resource is not configured.
  • the processing of the terminal device For example, the necessity code for special provisions can be used to indicate the necessity of the above three items.
  • the SSBID is used as the identifier of the associated dedicated RA resource/RA preamble, but the associated dedicated RA resource is not configured.
  • the terminal device cannot initiate a non-contention based beam failure recovery procedure on the candidate beam determined by this SSBID. That is, this is a configuration error.
  • the terminal device may perform a beam failure recovery process on a reference signal other than the reference signal for beam failure recovery configured by the network device, for example, a reference signal for beam management configured by the network device.
  • a reference signal for beam management configured by the network device.
  • the terminal device may be from the multiple wireless devices according to a configuration or indication of the network device and/or according to a preset rule.
  • One of the resources and/or multiple RA preambles is selected for one radio resource and one RA preamble for beam failure recovery.
  • the configuration or indication of the network device may be: preferentially using a dedicated radio resource and/or a dedicated RA preamble associated with the reference signal for beam failure recovery.
  • the terminal device preferentially uses the dedicated radio resource and/or the dedicated RA preamble. Code, the beam failure recovery process.
  • the configuration or indication of the network device may also be that the dedicated radio resource associated with the reference signal for beam failure recovery and/or the dedicated RA preamble has no priority. Therefore, the terminal device may select one radio resource and one RA preamble from the plurality of radio resources and/or the plurality of RA preambles according to other rules to perform the beam failure recovery process.
  • the specific manner in which the network device performs the above configuration or indication is not limited in this embodiment.
  • the foregoing only enumerates the two configurations of the configuration or indication of the network device, but the embodiment is not limited thereto, and the configuration or indication manners of the other achievable network devices regarding how the terminal device selects the radio resource and/or the RA preamble also includes Within the scope of this application.
  • the terminal device may determine which radio resource to transmit which RA preamble is preferentially used according to the configuration or indication of the network device, so that the selection can have a better network. control.
  • the predetermined rule may be a rule set in consideration of one or more of the following factors:
  • Factor 1 whether the reference signals associated with the plurality of radio resources and/or the plurality of RA preambles are reference signals configured by the network device for beam failure recovery, and/or
  • Factor 2 a measurement result of the reference signal associated with the plurality of radio resources and/or the plurality of RA preambles, and/or
  • the plurality of radio resources and/or the plurality of RA preambles are dedicated to the terminal device or shared by the terminal device with other terminal devices.
  • the terminal device may first prioritize the multiple radio resources and/or the plurality of RA preambles according to one or more of the foregoing factors, and then perform the foregoing by using the highest priority radio resource and/or preamble. Beam failure recovery.
  • the terminal device may pre-set the radio resource and/or the RA preamble associated with the reference signal for beam failure recovery configured by the network device to have a higher priority, that is, preset
  • the rule is that the radio resource and/or RA preamble associated with the reference signal for beam failure recovery configured by the network device has a higher priority. Therefore, the terminal device may perform the foregoing beam failure by preferentially selecting a radio resource and/or an RA preamble associated with the reference signal for beam failure recovery configured by the network device from the plurality of radio resources and/or the plurality of RA preambles. Recovery process.
  • the terminal device may preset a measurement result threshold (referred to as a third threshold), and set a radio resource and/or RA preamble associated with the reference signal whose measurement result is better than the third threshold.
  • the code has a higher priority, that is, the preset rule is that the radio resource and/or RA preamble associated with the reference signal whose measurement result is better than the above third threshold has a higher priority. Therefore, the terminal device may preferentially select the radio resource and/or the RA preamble associated with the reference signal whose measurement result is better than the third threshold to perform the beam failure recovery process.
  • the terminal device may also prioritize the measurement results of the reference signals associated with the multiple radio resources and/or the multiple RA preambles, and select the radio resource and/or RA associated with the reference signal with the highest priority.
  • the preamble performs the above beam failure recovery process.
  • the terminal device may pre-set that the radio resources and/or the RA preamble dedicated to the terminal device have a higher priority, that is, the preset rules are: dedicated radio resources and/or The RA preamble has a higher priority than the public radio resource and/or the RA preamble.
  • the terminal device can preferentially select a dedicated radio resource and/or an RA preamble to perform the beam failure recovery process described above.
  • the terminal device may also set the above-mentioned preset rules in consideration of any combination of the above factors. For example, the terminal device may consider quality priority, that is, consider the above factor 2 first, and consider other factors only when the result of the factor 2 is the same; or if the result of the factor 2 is the same, based on the specific implementation of the terminal device Selection of radio resources and/or RA preambles. Certainly, the embodiment does not limit this, and the terminal device may also consider the case where other factors are combined, and the description will not be repeated here.
  • the terminal device when there are multiple radio resources/multiple RA preambles available, the terminal device can determine which radio resource to transmit which RA preamble is preferentially used according to a preset rule. Thereby, the selection of the radio resource/RA preamble is performed based on the prioritization of the plurality of radio resources/multiple RA preambles, so that the selection is more flexible.
  • the network device configures the terminal device with a dedicated RA resource and/or a dedicated RA preamble for beam failure recovery associated with a synchronization signal block (SSB)
  • the network device is configured for the terminal device a reference signal (RS) associated with the above-mentioned synchronization signal block (SSB) for radio resource management (RRM) or beam management (BM), according to whether the synchronization signal block (SSB) and the reference signal (RS) are used by the terminal device Determining the first reference signal in a candidate beam reference signal list for beam failure recovery configured by the network device, and/or a measurement result of the synchronization signal block (SSB) and a measurement result of the reference signal (RS) Its associated radio resource and/or RA preamble.
  • RRM radio resource management
  • BM beam management
  • the network device configures the terminal device with a beam failure recovery dedicated RA resource/RA preamble X, which is also associated with the SSB, and is identified by the SSB index 1; the network device also configures the terminal device with a reference signal for the RRM or BM.
  • the CSI-RS is identified using the CSI-RS resource ID 2, and this CSI-RS resource map (QCL) is mapped to SSB index 1.
  • the terminal device When the terminal device determines that a beam failure event has occurred, it can compare the available reference signal measurements. Assuming that the measurement result of the SSB index 1 is worse than the threshold (referred to as the fourth threshold), the measurement result of the CSI-RS resource ID 2 is better than the fourth threshold.
  • the fourth threshold the threshold for a dedicated RA resource and/or RA preamble X, when the terminal device determines its priority, the following factors can be considered:
  • the SSB index 1 associated with it is included in the RRC-configured reference signal for beam failure recovery, with higher priority; but the quality of the SSB index 1 (measurement result) is not good, the priority is lower; Taking these two factors into consideration, determine the priority of this RA resource/RA preamble X;
  • the CSI-RS resource ID 2 associated with it is not in the RRC-configured reference signal for beam failure recovery, and has a lower priority; however, the quality (measurement result) of the CSI-RS resource ID 2 is good, priority Higher; taking into account these two factors, determine the priority of this RA resource / RA preamble X.
  • the terminal device may perform a beam failure recovery process by transmitting a random access (RA) preamble associated with the first reference signal by using a radio resource associated with the first reference signal.
  • the first reference signal may be a reference signal configured by the network device for beam failure recovery, whereby the network device can better manage beam failure recovery.
  • the first reference signal may also be a reference signal other than the reference signal configured by the network device for beam failure recovery, whereby the terminal device can still perform if the wireless environment changes beyond the network device estimation. Beam failure recovery.
  • the embodiment of the invention provides a configuration method for beam failure recovery.
  • the configuration method 400 for beam failure recovery includes:
  • Step 401 The network device configures, for the terminal device, a first reference signal for beam failure recovery, so that the terminal device sends the RA preamble associated with the first reference signal by using the radio resource associated with the first reference signal, to Perform a beam failure recovery process.
  • the network device may further configure a radio resource and an RA preamble associated with the first reference signal, such as a dedicated radio resource and a dedicated RA preamble, for the terminal device, and the specific configuration manner is not limited in this embodiment.
  • the radio resource associated with the first reference signal may be an RA resource dedicated to the terminal device, or may be a common RA resource of multiple terminal devices, for example, the network device is configured for the terminal device by using other processes. RA resources common to multiple terminal devices.
  • the RA preamble associated with the foregoing first reference signal may be an RA preamble dedicated to the terminal device, or may be a RA preamble common to a plurality of terminal devices, for example, the network device is configured for the terminal device by other processes. RA preamble common to multiple terminal devices.
  • the first reference signal is a synchronization signal block or a reference signal for beam failure recovery configured by the network device by using RRC signaling, and the measurement result of the first reference signal is better than the preset first Threshold.
  • the network device may further configure, for the terminal device, a candidate beam reference signal list, where the candidate beam reference signal list is a list of reference signal identifiers that may be used to initiate a beam failure recovery process, where the identifier of the first reference signal is included in The candidate beam is referenced in the signal list.
  • the network device can configure a list of reference signals for beam failure recovery, in which a portion of the reference signals have a dedicated configuration, ie associated with dedicated RA resources and/or RA preambles, and another portion The reference signal does not have the above dedicated configuration.
  • the network device can configure two lists, one of which includes only the reference signal having the dedicated configuration described above for beam failure recovery; the other list includes only reference signals that do not have the dedicated configuration described above, for the beam Failure to recover.
  • the network device may only configure one list with reference signals for the dedicated configuration described above.
  • the terminal device may select a corresponding reference signal and perform the beam failure recovery process using the RA resource and/or the RA preamble associated with the selected reference signal. Specifically, as described in Embodiment 1, no further details are provided herein.
  • the network device may configure a reference signal for beam failure recovery for the terminal device, and the terminal device may send the random access (RA) preamble associated with the reference signal by using the radio resource associated with the reference signal. Beam failure recovery process.
  • the network device can better manage the beam failure recovery.
  • the embodiment of the invention provides a resource selection device for beam failure recovery.
  • the device may be, for example, a terminal device or a component or component of the terminal device.
  • the principle of solving the problem is similar to the method of the first embodiment.
  • reference may be made to the implementation of the method in Embodiment 1, and the details are not described herein again.
  • FIG. 5 is a schematic diagram of a resource selection apparatus for beam failure recovery according to an embodiment of the present invention.
  • the resource selection apparatus 500 for beam failure recovery includes:
  • the first sending unit 501 sends the random access (RA) preamble associated with the first reference signal by using a radio resource associated with the first reference signal to perform a beam failure recovery process.
  • RA random access
  • the radio resource associated with the first reference signal may be an RA resource dedicated to the terminal device, or may be a RA resource common to multiple terminal devices; the RA preamble associated with the first reference signal may be the The RA preamble dedicated to the terminal device may also be a RA preamble common to a plurality of terminal devices.
  • the first reference signal is a synchronization signal block configured by the network device by using radio resource control (RRC) signaling for beam failure recovery and the measurement result is better than a preset first threshold.
  • RRC radio resource control
  • SSB SSB
  • RS reference signal
  • CSI-RS CSI-RS or other cell-specific or UE-specific reference signals.
  • the first reference signal may be a reference signal in a candidate beam reference signal list for beam failure recovery configured by the network device by using the RRC signaling for the terminal device
  • the candidate beam reference signal list is a list of reference signal identifiers used to initiate a beam failure recovery process.
  • the resource selection device 500 for beam failure recovery may further include:
  • a second sending unit 502 which may be located at a physical layer of the terminal device, to identify the first reference signal and the first reference according to a request of a media access control (MAC) layer of the terminal device The measurement result of the signal is reported to the MAC layer of the terminal device.
  • MAC media access control
  • the second sending unit 502 may also be located at the MAC layer of the terminal device, to send a request to the physical layer of the terminal device, requesting the physical layer of the terminal device to use the first reference.
  • the identifier of the signal and the measurement result of the first reference signal are reported to the MAC layer of the terminal device.
  • the first reference signal is a sync signal block or a reference signal having a physical layer measurement available and the measurement result being better than a preset second threshold.
  • the first reference signal is not in the candidate beam reference signal list for beam failure recovery configured by the network device by the RRC signaling for the terminal device.
  • the first reference signal may be a reference signal configured by the network device for radio resource management (RRM) or for beam management (BM).
  • RRM radio resource management
  • BM beam management
  • the resource selection device 500 for beam failure recovery may further include:
  • a selecting unit 503, where there are multiple radio resources and/or multiple RA preambles available may be from the plurality of radio resources and according to a configuration or indication of the network device and/or according to a preset rule / or one of the plurality of RA preambles is selected for one radio resource and one RA preamble for beam failure recovery.
  • the configuration or indication of the network device may be: preferentially using a dedicated radio resource and/or a dedicated RA preamble associated with the reference signal for beam failure recovery, or the configuration or indication of the network device may be:
  • the dedicated radio resource associated with the beam failure recovered reference signal and/or the dedicated RA preamble has no priority.
  • the preset rule may be set according to any one or more of the following: whether the reference signal associated with the multiple radio resources and/or multiple RA preambles is configured for a network device for beam failure a recovered reference signal, and/or a measurement result of the reference signal associated with the plurality of radio resources and/or the plurality of RA preambles, and/or the plurality of radio resources and/or the plurality of RA preambles are What is specific to the terminal device is that the terminal device is shared with other terminal devices.
  • the network device configures, for the terminal device, a dedicated RA resource and/or a dedicated RA preamble for beam failure recovery associated with a synchronization signal block
  • the network device is the
  • the terminal device is configured with a reference signal associated with the synchronization signal block for radio resource management or beam management
  • the selection unit 503 may be configured according to whether the synchronization signal block and the reference signal are located in a network device configuration.
  • the candidate beam reference signal list of beam failure recovery, and/or the measurement result of the synchronization signal block and the measurement result of the reference signal the first reference signal and its associated radio resource and RA preamble are determined.
  • the resource selection device 500 for beam failure recovery may also include other components or modules. For specific contents of these components or modules, reference may be made to related technologies.
  • connection relationship or signal direction between the various components or modules is exemplarily shown in FIG. 5, but it should be clear to those skilled in the art that various related technologies such as bus connection can be employed.
  • the above various components or modules may be implemented by hardware facilities such as a processor, a memory, a transmitter, a receiver, etc.; the implementation of the present invention is not limited thereto.
  • the terminal device may perform a beam failure recovery process by transmitting a random access (RA) preamble associated with the first reference signal by using a radio resource associated with the first reference signal.
  • the first reference signal may be a reference signal configured by the network device for beam failure recovery, whereby the network device can better manage the beam failure recovery.
  • the first reference signal may also be a reference signal other than the reference signal configured by the network device for beam failure recovery, whereby the terminal device can still perform if the wireless environment changes beyond the network device estimation. Beam failure recovery.
  • Embodiments of the present invention provide a configuration apparatus for beam failure recovery.
  • the device may be, for example, a network device or some or some of the components or components of the network device.
  • the principle of solving the problem is similar to the method of the second embodiment. For the specific implementation, reference may be made to the implementation of the method in the second embodiment, and the details are not described herein again.
  • FIG. 6 is a schematic diagram of a device for configuring beam failure recovery according to an embodiment of the present invention. As shown in FIG. 6, the beam failure recovery configuration 600 includes:
  • a first configuration unit 601 configured to configure, by the terminal device, a first reference signal for beam failure recovery, so that the terminal device sends the RA preamble associated with the first reference signal by using the radio resource associated with the first reference signal To perform the beam failure recovery process.
  • the network device may further configure a radio resource and an RA preamble associated with the first reference signal, such as a dedicated radio resource and a dedicated RA preamble, for the terminal device, and the specific configuration manner is not limited in this embodiment. .
  • the radio resource associated with the first reference signal may be an RA resource dedicated to the terminal device, or may be a common RA resource of multiple terminal devices.
  • the network device uses the other process as the terminal device.
  • the RA preamble associated with the first reference signal may be an RA preamble specific to the terminal device, or may be a RA preamble common to multiple terminal devices, for example, a network.
  • the device is configured for the above terminal device through other processes.
  • the first reference signal may be a synchronization signal block or a reference signal whose measurement result is better than a preset first threshold.
  • the first configuration unit 601 may configure a candidate beam reference signal list for the terminal device, where the candidate beam reference signal list is a list of reference signal identifiers that may be used to initiate a beam failure recovery process, where the first The identification of the reference signal is included in the list of candidate beam reference signals.
  • the first configuration unit 601 can configure a candidate beam reference signal list, wherein some of the reference signals have a dedicated configuration, that is, a dedicated RA resource and/or an RA preamble are associated, and another portion of the reference signal does not have the dedicated configuration described above.
  • the first configuration unit 601 can configure two candidate beam reference signal lists, one of which includes a reference signal having the dedicated configuration described above, and another of which includes a reference signal without the dedicated configuration described above.
  • the first configuration unit 601 can configure a candidate beam reference signal list, the list only including the reference signal having the dedicated configuration described above.
  • the configuration 600 for beam failure recovery may further include:
  • a second configuration unit 602 configured to configure a priority of the plurality of radio resources and/or a plurality of RA preambles for the terminal device if a plurality of radio resources and/or a plurality of RA preambles are available. Thereby, the terminal device can select an appropriate radio resource and an RA preamble for beam failure recovery according to the configuration of the second configuration unit 602.
  • the configuration 600 for beam failure recovery may further include:
  • a third configuration unit 603 configured to configure, for the terminal device, a dedicated RA resource and/or a dedicated RA preamble for beam failure recovery associated with a synchronization signal block, and configured for the terminal device for radio resource management or a beam management reference signal associated with the synchronization signal block, the first reference signal being the synchronization signal block or the reference signal.
  • the terminal device may be configured according to whether the synchronization signal block and the reference signal are located in a candidate beam reference signal list for beam failure recovery configured by the network device, and/or the measurement result of the synchronization signal block and the The first reference signal and its associated radio resource and RA preamble are determined by the measurement of the reference signal.
  • the configuration device 600 for beam failure recovery may also include other components or modules. For details of these components or modules, reference may be made to related technologies.
  • connection relationship or signal direction between the various components or modules is exemplarily shown in FIG. 6, but it should be clear to those skilled in the art that various related technologies such as bus connection can be employed.
  • the above various components or modules may be implemented by hardware facilities such as a processor, a memory, a transmitter, a receiver, etc.; the implementation of the present invention is not limited thereto.
  • the network device may configure, for the terminal device, a reference signal for beam failure recovery and a radio resource and/or an RA preamble associated with the reference signal, where the terminal device sends the radio resource associated with the reference signal.
  • the beam failure recovery process can be performed by referring to the random access (RA) preamble associated with the signal.
  • RA random access
  • the embodiment of the present invention further provides a terminal device, where the terminal device includes the resource selection device for beam failure recovery described in Embodiment 3.
  • FIG. 7 is a schematic diagram of the composition of a terminal device according to an embodiment of the present invention.
  • the terminal device 700 can include a central processor 701 and a memory 702; the memory 702 is coupled to the central processor 701.
  • the figure is exemplary; other types of structures may be used in addition to or in place of the structure to implement telecommunications functions or other functions.
  • the function of the resource selection device for beam failure recovery of Embodiment 3 may be integrated into the central processing unit 701, and the function of the resource selection device for beam failure recovery described in Embodiment 3 is implemented by the central processing unit 701.
  • the function of the resource selection transmission device for beam failure recovery is incorporated herein and will not be described herein.
  • the resource selection device for beam failure recovery of Embodiment 3 may be configured separately from the central processing unit 701.
  • the resource selection device that can recover the beam failure recovery is configured as a chip connected to the central processing unit 701.
  • the control of the central processing unit 701 implements the function of the resource selection device for the beam failure recovery.
  • the terminal device 700 may further include: a communication module 703, an input unit 704, an audio processing unit 705, a display 706, and a power source 707. It should be noted that the terminal device 700 does not have to include all the components shown in FIG. 7; in addition, the terminal device 700 may further include components not shown in FIG. 7, and reference may be made to the prior art.
  • central processor 701 may include a microprocessor or other processor device and/or logic device that receives input and controls each of terminal devices 700. The operation of the part.
  • the memory 702 can be, for example, one or more of a buffer, a flash memory, a hard drive, a removable medium, a volatile memory, a non-volatile memory, or other suitable device.
  • the above configuration-related information can be stored, and a program for executing the related information can be stored.
  • the central processing unit 701 can execute the program stored in the memory 702 to implement information storage or processing and the like.
  • the functions of other components are similar to those of the existing ones and will not be described here.
  • the various components of user device 700 may be implemented by special purpose hardware, firmware, software, or a combination thereof without departing from the scope of the invention.
  • the terminal device may perform a beam failure recovery process by transmitting a random access (RA) preamble associated with the first reference signal by using a radio resource associated with the first reference signal.
  • the first reference signal may be a reference signal configured by the network device for beam failure recovery, whereby the network device can better manage the beam failure recovery.
  • the first reference signal may also be a reference signal other than the reference signal configured by the network device for beam failure recovery, whereby the terminal device can still perform if the wireless environment changes beyond the network device estimation. Beam failure recovery.
  • the embodiment of the present invention further provides a network device, where the network device includes the configuration device for recovering the failure of the beam according to Embodiment 4.
  • FIG. 8 is a schematic structural diagram of an embodiment of a network device according to an embodiment of the present invention.
  • network device 800 can include a central processing unit (CPU) 801 and memory 802; and memory 802 is coupled to central processor 801.
  • the memory 802 can store various data; in addition, a program for information processing is stored, and the program is executed under the control of the central processing unit 801 to receive various information transmitted by the terminal device and to transmit various information to the terminal device.
  • the function of the configuration device for beam failure recovery described in Embodiment 4 may be integrated into the central processing unit 801, and the function of the configuration device for beam failure recovery described in Embodiment 4 is implemented by the central processing unit 801.
  • the function of the configuration device for beam failure recovery is incorporated herein and will not be described again.
  • the configuration device for beam failure recovery of Embodiment 4 may be configured separately from the central processing unit 801.
  • the configuration device that can recover the beam failure recovery is configured as a chip connected to the central processing unit 801, and is processed through the central processing.
  • the control of the 801 is implemented to implement the function of the configuration device for the beam failure recovery.
  • the network device 800 may further include: a transceiver 803, an antenna 804, and the like; wherein the functions of the foregoing components are similar to the prior art, and details are not described herein again. It should be noted that the network device 800 does not have to include all the components shown in FIG. 8; in addition, the network device 800 may also include components not shown in FIG. 8, and reference may be made to the prior art.
  • the network device may configure, for the terminal device, a reference signal for beam failure recovery and a radio resource and/or an RA preamble associated with the reference signal, where the terminal device sends the radio resource associated with the reference signal.
  • the beam failure recovery process can be performed by referring to the random access (RA) preamble associated with the signal.
  • RA random access
  • the embodiment of the present invention further provides a communication system.
  • the communication system 100 can include:
  • the network device 201 which is configured with the beam failure recovery configuration device 600 as described in Embodiment 4, and the steps of the method for configuring the beam failure recovery described in Embodiment 2, which may be the network device 800 described in Embodiment 6; as well as
  • the terminal device 202 is configured with the resource selection device 500 of the beam failure recovery according to the embodiment 3, and the steps of the resource selection method for implementing the beam failure recovery described in Embodiment 1 may be the terminal device described in Embodiment 5. 700.
  • the embodiment of the present invention further provides a computer readable program, wherein when the program is executed in a terminal device, the program causes a computer to execute the method described in Embodiment 1 in the terminal device.
  • An embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes a computer to execute the method described in Embodiment 1 in a terminal device.
  • Embodiments of the present invention also provide a computer readable program, wherein when the program is executed in a network device, the program causes a computer to execute the method described in Embodiment 2 in the network device.
  • the embodiment of the present invention further provides a storage medium storing a computer readable program, wherein the computer readable program causes the computer to execute the method described in Embodiment 2 in a network device.
  • the above apparatus and method of the present invention may be implemented by hardware or by hardware in combination with software.
  • the present invention relates to a computer readable program that, when executed by a logic component, enables the logic component to implement the apparatus or components described above, or to cause the logic component to implement the various methods described above Or steps.
  • Logic components such as field programmable logic components, microprocessors, processors used in computers, and the like.
  • the present invention also relates to a storage medium for storing the above program, such as a hard disk, a magnetic disk, an optical disk, a DVD, a flash memory, or the like.
  • the method/apparatus described in connection with the embodiments of the invention may be embodied directly in hardware, a software module executed by a processor, or a combination of both.
  • one or more of the functional blocks shown in the figures and/or one or more combinations of functional blocks may correspond to
  • the individual software modules of the computer program flow may also correspond to the respective hardware modules.
  • These software modules may correspond to the respective steps shown in the figures.
  • These hardware modules can be implemented, for example, by curing these software modules using a Field Programmable Gate Array (FPGA).
  • FPGA Field Programmable Gate Array
  • the software module can reside in RAM memory, flash memory, ROM memory, EPROM memory, EEPROM memory, registers, hard disk, removable disk, CD-ROM, or any other form of storage medium known in the art.
  • a storage medium can be coupled to the processor to enable the processor to read information from, and write information to, the storage medium; or the storage medium can be an integral part of the processor.
  • the processor and the storage medium can be located in an ASIC.
  • the software module can be stored in the memory of the mobile terminal or in a memory card that can be inserted into the mobile terminal.
  • the software module can be stored in the MEGA-SIM card or a large-capacity flash memory device.
  • One or more of the functional blocks described in the figures and/or one or more combinations of functional blocks may be implemented as a general purpose processor, digital signal processor (DSP) for performing the functions described herein.
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • One or more of the functional blocks described with respect to the figures and/or one or more combinations of functional blocks may also be implemented as a combination of computing devices, eg, a combination of a DSP and a microprocessor, multiple microprocessors One or more microprocessors in conjunction with DSP communication or any other such configuration.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

L'invention concerne un procédé et un appareil de sélection de ressources pour la récupération de défaillance de faisceau, et un système de communication. Le procédé comprend les étapes suivantes : un dispositif terminal utilise une ressource radio associée à un premier signal de référence pour envoyer un préambule d'accès aléatoire (RA) associé au premier signal de référence de façon à effectuer un processus de récupération de défaillance de faisceau. Dans le présent mode de réalisation, un dispositif terminal peut effectuer un processus de récupération de défaillance de faisceau à l'aide d'une ressource radio associée à un premier signal de référence pour envoyer un préambule d'accès aléatoire (RA) associé au premier signal de référence. Le premier signal de référence peut être un signal de référence configuré par un dispositif de réseau et utilisé pour la récupération de défaillance de faisceau. Ainsi, le dispositif de réseau peut mieux gérer la récupération de défaillance de faisceau. De plus, le premier signal de référence peut également être un signal de référence autre que le signal de référence configuré par le dispositif de réseau et utilisé pour la récupération de défaillance de faisceau. Ainsi, lorsqu'un changement dans un environnement radio dépasse celui estimé par le dispositif de réseau, le dispositif terminal peut toujours effectuer une récupération de défaillance de faisceau.
PCT/CN2018/076734 2018-02-13 2018-02-13 Procédé et appareil de sélection de ressources pour la récupération de défaillance de faisceau, et système de communication Ceased WO2019157664A1 (fr)

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