WO2023159403A1 - Dégradation des performances de démodulation au niveau d'un commutateur de faisceau de réception autonome d'un ue - Google Patents

Dégradation des performances de démodulation au niveau d'un commutateur de faisceau de réception autonome d'un ue Download PDF

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Publication number
WO2023159403A1
WO2023159403A1 PCT/CN2022/077526 CN2022077526W WO2023159403A1 WO 2023159403 A1 WO2023159403 A1 WO 2023159403A1 CN 2022077526 W CN2022077526 W CN 2022077526W WO 2023159403 A1 WO2023159403 A1 WO 2023159403A1
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WIPO (PCT)
Prior art keywords
reference signals
proportion
slots
beam management
symbols
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PCT/CN2022/077526
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English (en)
Inventor
Lars Dalsgaard
Lei Du
Yue Ji CHEN
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Nokia Shanghai Bell Co., Ltd.
Nokia Solutions And Networks Oy
Nokia Technologies Oy
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Application filed by Nokia Shanghai Bell Co., Ltd., Nokia Solutions And Networks Oy, Nokia Technologies Oy filed Critical Nokia Shanghai Bell Co., Ltd.
Priority to PCT/CN2022/077526 priority Critical patent/WO2023159403A1/fr
Priority to CN202310144212.6A priority patent/CN116647885A/zh
Publication of WO2023159403A1 publication Critical patent/WO2023159403A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0058—Transmission of hand-off measurement information, e.g. measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0868—Hybrid systems, i.e. switching and combining
    • H04B7/088—Hybrid systems, i.e. switching and combining using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/06—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the transmitting station
    • H04B7/0686—Hybrid systems, i.e. switching and simultaneous transmission
    • H04B7/0695—Hybrid systems, i.e. switching and simultaneous transmission using beam selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/34—Reselection control
    • H04W36/36—Reselection control by user or terminal equipment
    • H04W36/362—Conditional handover
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/046—Wireless resource allocation based on the type of the allocated resource the resource being in the space domain, e.g. beams
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H04W36/085—Reselecting an access point involving beams of access points

Definitions

  • Example embodiments of the present disclosure generally relate to the field of communications, and in particular, to a device, method, apparatus and computer readable storage medium for restrictions of demodulation performance degradation at user equipment (UE) autonomous receive (Rx) beam switch.
  • UE user equipment
  • Rx autonomous receive
  • a receive timing difference is known as a receive timing difference between downlink (DL) transmission from a primary cell and a secondary cell to a UE.
  • UE performance may only be guaranteed without a negative impact if the RTD between the primary cell and the secondary cell is lower than a certain threshold. If the RTD exceeds the certain threshold, the UE is allowed some demodulation performance degradation, for example due to network driven Rx beam switch or UE autonomous Rx beam switch.
  • RTD receive timing difference
  • example embodiments of the present disclosure provide a device, method, apparatus and computer readable storage medium for restrictions of demodulation performance degradation at UE autonomous Rx beam switch.
  • a device which comprises at least one processor and at least one memory including computer program code.
  • the at least one memory and the computer program code are configured to, with the at least one processor, cause the device to receive downlink transmission using at least one receive beam of the device. Further, the device is caused to determine autonomous receive beam switch by the device. Moreover, in accordance with a determination that a receive timing difference between a primary cell and a secondary cell is higher than a receive timing difference threshold, the device is caused to perform the autonomous receive beam switch and allow: a demodulation performance degradation on up to a first proportion of symbols; or a demodulation performance degradation on up to a second proportion of slots.
  • a method is provided.
  • a terminal device receives downlink transmission using at least one receive beam of a terminal device. Further, the terminal device determines autonomous receive beam switch by the terminal device. Moreover, in accordance with a determination that a receive timing difference between a primary cell and a secondary cell is higher than a receive timing difference threshold, the terminal device performs the autonomous receive beam switch and allows: a demodulation performance degradation on up to a first proportion of symbols; or a demodulation performance degradation on up to a second proportion of slots.
  • an apparatus comprising means for performing the method according to the second aspect.
  • a computer readable storage medium comprising program instructions stored thereon. The instructions, when executed by a processor of a device, cause the device to perform the method according to the second aspect.
  • FIG. 1 illustrates an example environment in which example embodiments of the present disclosure can be implemented
  • FIG. 2 illustrates a flowchart of an example method according to some example embodiments of the present disclosure.
  • FIG. 3 illustrates a simplified block diagram of a device that is suitable for implementing example embodiments of the present disclosure.
  • the term “network device” refers to a device via which services can be provided to a terminal device in a communication network.
  • the network device may comprise a base station.
  • the term “base station” refers to a network device via which services can be provided to a terminal device in a communication network.
  • the base station may comprise any suitable device via which a terminal device or UE can access the communication network.
  • Examples of the base stations include a relay, an access point (AP) , a transmission point (TRP) , a node B (NodeB or NB) , an evolved NodeB (eNodeB or eNB) , a New Radio (NR) NodeB (gNB) , a Remote Radio Module (RRU) , a radio header (RH) , a remote radio head (RRH) , a low power node such as a femto, a pico, and the like.
  • AP access point
  • TRP transmission point
  • NodeB or NB node B
  • eNodeB or eNB evolved NodeB
  • gNB New Radio
  • RRU Remote Radio Module
  • RH radio header
  • RRH remote radio head
  • a low power node such as a femto, a pico, and the like.
  • terminal device or “user equipment” (UE) refers to any terminal device capable of wireless communications with each other or with the base station.
  • the communications may involve transmitting and/or receiving wireless signals using electromagnetic signals, radio waves, infrared signals, and/or other types of signals suitable for conveying information over air.
  • the UE may be configured to transmit and/or receive information without direct human interaction. For example, the UE may transmit information to the base station on predetermined schedules, when triggered by an internal or external event, or in response to requests from the network side.
  • Examples of the user device include, but are not limited to, smart phones, wireless-enabled tablet computers, laptop-embedded equipment (LEE) , laptop-mounted equipment (LME) , wireless customer-premises equipment (CPE) , sensors, metering devices, personal wearables such as watches, and/or vehicles that are capable of communication.
  • LEE laptop-embedded equipment
  • LME laptop-mounted equipment
  • CPE wireless customer-premises equipment
  • sensors metering devices
  • personal wearables such as watches, and/or vehicles that are capable of communication.
  • circuitry may refer to one or more or all of the following:
  • combinations of hardware circuits and software such as (as applicable) : (i) a combination of analog and/or digital hardware circuit (s) with software/firmware and (ii) any portions of hardware processor (s) with software (including digital signal processor (s) ) , software, and memory (ies) that work together to cause an apparatus, such as a mobile phone or server, to perform various functions) and
  • circuitry also covers an implementation of merely a hardware circuit or processor (or multiple processors) or portion of a hardware circuit or processor and its (or their) accompanying software and/or firmware.
  • circuitry also covers, for example and if applicable to the particular claim element, a baseband integrated circuit or processor integrated circuit for a mobile device or a similar integrated circuit in a server, a cellular base station, or other computing or base station.
  • first As used herein, the terms “first” , “second” and the like may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another. For example, a first element could be referred to as a second element, and similarly, a second element could be termed a first element, without departing from the scope of example embodiments. As used herein, the term “and/or” includes any and all combinations of one or more of the listed terms.
  • MRTD maximum receive timing difference
  • IBM independent Beam Management
  • a UE capable of FR2 inter-band carrier aggregation (CA) and IBM can operate the UE Receive (Rx) beams in each band independently of each other based on the reference signal for beam management received in each band.
  • the UE shall be capable of handling at least a relative RTD between slot timing of all pairs of carriers to be aggregated at the UE receiver as shown in Table 1.
  • Table1 MRTD requirement for inter-band NR carrier aggregation
  • UE MRTD requirement for a UE capable of Common Beam Management (CBM) .
  • CBM Common Beam Management
  • a UE capable of FR2 inter-band CA and CBM can only operate with common UE Rx beam (s) in both bands, where the reference signals for beam management used are received in one of the bands.
  • CBM has been discussed widely.
  • no requirements have yet been defined for the UE capable of FR2 inter-band CA with common beam management.
  • the MRTD for FR2 inter-band CA in FR2 which the UE shall be able to cope with is agreed to be up to 3us for CBM capable UEs.
  • the UE performance may only be guaranteed without a negative impact if the RTD between the primary cell and the secondary cell is lower than a certain threshold. If the observed RTD as experienced by the UE exceeds the certain threshold, the UE is allowed some demodulation performance degradation, for example due to network driven Rx beam switch or UE autonomous Rx beam switch.
  • BM Network controlled beam management
  • BM-RS downlink reference signals for BM
  • L1-RSRP measurement reports
  • the network can send the TCI state activation command to inform the change of TCI state.
  • the UE will adjust its Rx beam to adapt with the new TCI state. This means that the DL RS used for BM is controlled by the network and only changed by the network.
  • the UE autonomous Rx beam switch is fully up to UE implementation, that is, the UE is allowed to autonomously switch the Rx beam at any time and without any limitation, this means that from the network point of view, it is not possible to know or predict when the UE will change its Rx beam and therefore when there could be a potential impact from the UE autonomous Rx beam switch and the related potential demodulation performance degradation.
  • the UE Rx beam switch has no impact to the network performance when RTD is within the threshold e.g. one CP length, but in FR2 inter-band CA where RTD may exceed the threshold, the Rx beam switch may lead to demodulation performance degradation. If the network does not know when or how often the UE may lose some symbols, and hence it is difficult to guarantee minimum performance due to UE autonomous Rx beam switch.
  • Example embodiments of the present disclosure provide a scheme of restrictions of demodulation performance degradation at UE autonomous Rx beam switch.
  • a device such as a UE receives downlink transmission using at least one receive beam of a terminal device. Further, the terminal device determines autonomous receive beam switch by the terminal device. Moreover, in accordance with a determination that a receive timing difference between a primary cell and a secondary cell is higher than a receive timing difference threshold, the terminal device performs the autonomous receive beam switch and allows: a demodulation performance degradation on up to a first proportion of symbols; or a demodulation performance degradation on up to a second proportion of slots.
  • This scheme restricts the demodulation performance degradation at UE autonomous Rx beam switch. As such, it is allowed to avoid severe demodulation performance degradation of the UE.
  • FIG. 1 shows an example environment 100 in which example embodiments of the present disclosure can be implemented.
  • the environment 100 which may be a part of a communication network, comprises two devices 110 and 120 communicating with each other or with other devices via each other.
  • the devices 110 and 120 may be implemented by any suitable devices in the communication network.
  • the device 110 may be implemented by a terminal device and the device 120 may be implemented by a network device, or vice versa.
  • the devices 110 and 120 may be both implemented by terminal devices or network devices.
  • the terminal device will be taken as an example of the device 110
  • the network device will be taken as an example of the device 120.
  • the environment 200 may comprise a further device to communicate with the device 110 and the device 120.
  • the device 110 may be connected to two cells (referred to as a primary cell and a secondary cell) under the control of the device 120.
  • the communications in the environment 100 may follow any suitable communication standards or protocols, which are already in existence or to be developed in the future, such as Universal Mobile Telecommunications System (UMTS) , long term evolution (LTE) , LTE-Advanced (LTE-A) , the fifth generation (5G) New Radio (NR) , Wireless Fidelity (Wi-Fi) and Worldwide Interoperability for Microwave Access (WiMAX) standards, and employs any suitable communication technologies, including, for example, Multiple-Input Multiple-Output (MIMO) , Orthogonal Frequency Division Multiplexing (OFDM) , time division multiplexing (TDM) , frequency division multiplexing (FDM) , code division multiplexing (CDM) , Bluetooth, ZigBee, and machine type communication (MTC) , enhanced mobile broadband (eMBB) , massive machine type communication (mMTC) , ultra-reliable low latency communication (URLLC) , Carrier Aggregation (CA) , Dual Connection (DC) , and
  • FIG. 2 shows a flowchart of an example method 200 according to some example embodiments of the present disclosure.
  • the method 200 can be implemented by the device 110 as shown in FIG. 1.
  • the method 200 will be described with reference to FIG. 1.
  • the device 110 receives downlink transmission from the device 120 using at least one receive beam of the device 110.
  • the device 110 determines autonomous receive beam switch.
  • the device 110 may move a little bit or rotate. In this case, the device 110 may then determine autonomous receive beam switch to optimize the beam alignment with the current active transmission configuration indicator (TCI) state.
  • TCI current active transmission configuration indicator
  • the device 110 performs the autonomous receive beam switch and allows: a demodulation performance degradation on up to a first proportion of symbols; or a demodulation performance degradation on up to a second proportion of slots.
  • the demodulation performance degradation may be determined based on one or more downlink reference signals, which the device 110 may use to monitor or track the active DL beam or TCI-state.
  • the first proportion of symbols and the second proportion of slots may be determined based on one or more periodicities of the one or more downlink reference signals.
  • the one or more downlink reference signals may comprise one or more reference signals for beam management.
  • the one or more downlink reference signals may comprise at least one of the following: a synchronization signal block (SSB) for layer 1 reference signal received power (L1-RSRP) measurements or layer 3 reference signal received power (L3-RSRP) measurements; a channel state information reference signal (CSI-RS) for L1-RSRP measurements or L3-RSRP measurements; a reference signal for radio link monitoring; a reference signal for beam failure detection; or a reference signal for beam management.
  • SSB synchronization signal block
  • L1-RSRP layer 1 reference signal received power
  • L3-RSRP layer 3 reference signal received power
  • CSI-RS channel state information reference signal
  • the first proportion of symbols may be determined as a number of symbols impacted being divided by a number of symbols available during a duration associated with the one or more downlink reference signals.
  • the number of symbols impacted may be one.
  • the second proportion of slots may be determined as a number of slots impacted being divided by a number of slots available during a duration associated with one or more downlink reference signals.
  • the number of slots impacted may be one.
  • the duration may be determined at least based on a periodicity of the reference signal for beam management. For example, the duration may be determined to be equal to the periodicity of the reference signal for beam management.
  • the duration may be determined at least based on one of the following: a minimum one of periodicities of the multiple reference signals for beam management; a weighted periodicity for the multiple reference signals for beam management; or a smallest time distance, that is, a smallest time gap in the time domain, between the multiple reference signals for beam management.
  • the duration may be determined to be equal to the minimum one of periodicities of the multiple reference signals for beam management.
  • the duration may be determined to be equal to the weighted periodicity for the multiple reference signals for beam management.
  • the weight factor may be determined based on any selection criterion.
  • the duration may be determined to be equal to the smallest time distance between the multiple reference signals for beam management.
  • the duration may be determined at least based on one of the following: a minimum one of periodicities of the one or more reference signals for beam management and the additional downlink reference signals; a weighted periodicity for the one or more reference signals for beam management and the additional downlink reference signals; a smallest time distance between one of the one or more reference signals for beam management and one of the additional downlink reference signals; or a smallest time distance between two of the additional downlink reference signals.
  • the duration may be determined to be equal to the minimum one of periodicities of the one or more reference signals for beam management and the additional downlink reference signals.
  • the duration may be determined to be equal to the weighted periodicity for the one or more reference signals for beam management and the additional downlink reference signals.
  • the weight factor may be determined based on any selection criterion or as a pre-defined value.
  • the duration may be determined to be equal to the smallest time distance between one of the one or more reference signals for beam management and one of the additional downlink reference signals.
  • the duration may be determined to be equal to the smallest time distance between two of the additional downlink reference signals.
  • the allowed demodulation performance degradation on up to the first proportion of symbols or the allowed demodulation performance degradation on up to the second proportion of slots may be determined considering the measurement relaxation for radio link monitoring and/or beam failure detection.
  • the first proportion of symbols or the second proportion of slots may be determined based on a periodicity of a reference signal for radio link monitoring and/or a reference signal for beam failure detection multiplied by a relaxation factor.
  • FIG. 3 is a simplified block diagram of a device 300 that is suitable for implementing example embodiments of the present disclosure.
  • the device 300 can be implemented at or as a part of the device 110 or the device 120 as shown in FIG. 1.
  • the device 300 includes a processor 310, a memory 320 coupled to the processor 310, a communication module 330 coupled to the processor 310, and a communication interface (not shown) coupled to the communication module 330.
  • the memory 320 stores at least a program 340.
  • the communication module 330 is for bidirectional communications, for example, via multiple antennas.
  • the communication interface may represent any interface that is necessary for communication.
  • the program 340 is assumed to include program instructions that, when executed by the associated processor 310, enable the device 300 to operate in accordance with the example embodiments of the present disclosure, as discussed herein with reference to FIGS. 1-2.
  • the example embodiments herein may be implemented by computer software executable by the processor 310 of the device 300, or by hardware, or by a combination of software and hardware.
  • the processor 310 may be configured to implement various example embodiments of the present disclosure.
  • the memory 320 may be of any type suitable to the local technical network and may be implemented using any suitable data storage technology, such as a non-transitory computer readable storage medium, semiconductor based memory devices, magnetic memory devices and systems, optical memory devices and systems, fixed memory and removable memory, as non-limiting examples. While only one memory 320 is shown in the device 300, there may be several physically distinct memory modules in the device 300.
  • the processor 310 may be of any type suitable to the local technical network, and may include one or more of general purpose computers, special purpose computers, microprocessors, digital signal processors (DSPs) and processors based on multicore processor architecture, as non-limiting examples.
  • the device 300 may have multiple processors, such as an application specific integrated circuit chip that is slaved in time to a clock which synchronizes the main processor.
  • the processor 310 and the communication module 330 may cooperate to implement the method 200 as described above with reference to FIG. 1. All operations and features as described above with reference to FIGS. 1-2 are likewise applicable to the device 300 and have similar effects. For the purpose of simplification, the details will be omitted.
  • various example embodiments of the present disclosure may be implemented in hardware or special purpose circuits, software, logic or any combination thereof. Some aspects may be implemented in hardware, while other aspects may be implemented in firmware or software which may be executed by a controller, microprocessor or other computing device. While various aspects of example embodiments of the present disclosure are illustrated and described as block diagrams, flowcharts, or using some other pictorial representations, it is to be understood that the block, apparatus, system, technique or method described herein may be implemented in, as non-limiting examples, hardware, software, firmware, special purpose circuits or logic, general purpose hardware or controller or other computing devices, or some combination thereof.
  • the present disclosure also provides at least one computer program product tangibly stored on a non-transitory computer readable storage medium.
  • the computer program product includes computer-executable instructions, such as those included in program modules, being executed in a device on a target real or virtual processor, to carry out the method 200 as described above with reference to FIG. 1.
  • program modules include routines, programs, libraries, objects, classes, components, data structures, or the like that perform particular tasks or implement particular abstract data types.
  • the functionality of the program modules may be combined or split between program modules as desired in various example embodiments.
  • Machine-executable instructions for program modules may be executed within a local or distributed device. In a distributed device, program modules may be located in both local and remote storage media.
  • Program code for carrying out methods of the present disclosure may be written in any combination of one or more programming languages. These program codes may be provided to a processor or controller of a general purpose computer, special purpose computer, or other programmable data processing apparatus, such that the program codes, when executed by the processor or controller, cause the functions/operations specified in the flowcharts and/or block diagrams to be implemented.
  • the program code may execute entirely on a machine, partly on the machine, as a stand-alone software package, partly on the machine and partly on a remote machine or entirely on the remote machine or server.
  • the computer program codes or related data may be carried by any suitable carrier to enable the device, apparatus or processor to perform various processes and operations as described above.
  • Examples of the carrier include a signal, computer readable media.
  • the computer readable medium may be a computer readable signal medium or a computer readable storage medium.
  • a computer readable medium may include but not limited to an electronic, magnetic, optical, electromagnetic, infrared, or semiconductor system, apparatus, or device, or any suitable combination of the foregoing.
  • the computer readable storage medium would include an electrical connection having one or more wires, a portable computer diskette, a hard disk, a random access memory (RAM) , a read-only memory (ROM) , an erasable programmable read-only memory (EPROM or Flash memory) , an optical fiber, a portable compact disc read-only memory (CD-ROM) , Digital Versatile Disc (DVD) , an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.
  • RAM random access memory
  • ROM read-only memory
  • EPROM or Flash memory erasable programmable read-only memory
  • CD-ROM compact disc read-only memory
  • DVD Digital Versatile Disc
  • an optical storage device a magnetic storage device, or any suitable combination of the foregoing.
  • a method comprises: receiving downlink transmission using at least one receive beam of a terminal device; determining autonomous receive beam switch by the terminal device, and in accordance with a determination that a receive timing difference between a primary cell and a secondary cell is higher than a receive timing difference threshold, performing the autonomous receive beam switch and allowing: a demodulation performance degradation on up to a first proportion of symbols; or a demodulation performance degradation on up to a second proportion of slots.
  • the first proportion of symbols and the second proportion of slots are determined based on one or more periodicities of one or more downlink reference signals.
  • the first proportion of symbols is determined as a number of symbols impacted being divided by a number of symbols available during a duration associated with the one or more downlink reference signals.
  • the second proportion of slots is determined as a number of slots impacted being divided by a number of slots available during a duration associated with one or more downlink reference signals.
  • the number of symbols/slots impacted is one.
  • the one or more downlink reference signals comprise single reference signal for beam management, and the duration is determined at least based on a periodicity of the reference signal for beam management.
  • the one or more downlink reference signals comprise multiple reference signals for beam management with the same or different periodicities, and the duration is determined at least based on one of the following: a minimum one of periodicities of the multiple reference signals for beam management; a weighted periodicity for the multiple reference signals for beam management; or a smallest time distance between the multiple reference signals for beam management.
  • the one or more downlink reference signals comprise one or more reference signals for beam management on a first band for the primary cell and additional downlink reference signals on a second band for the secondary cell, and the duration is determined at least based on one of the following: a minimum one of periodicities of the one or more reference signals for beam management and the additional downlink reference signals; a weighted periodicity for the one or more reference signals for beam management and the additional downlink reference signals; a smallest time distance between one of the one or more reference signals for beam management and one of the additional downlink reference signals; or a smallest time distance between two of the additional downlink reference signals.
  • the downlink reference signals comprises at least one of the following: a synchronization signal block; a channel state information reference signal; a reference signal for radio link monitoring; a reference signal for beam failure detection; or a reference signal for beam management.
  • the allowed demodulation performance degradation on up to the first proportion of symbols or the allowed demodulation performance degradation on up to the second proportion of slots is determined considering the measurement relaxation for radio link monitoring and/or beam failure detection.
  • the first proportion of symbols or the second proportion of slots is determined based on a periodicity of a reference signal for radio link monitoring and/or a reference signal for beam failure detection multiplied by a relaxation factor.
  • a device comprises: at least one processor; and at least one memory including computer program code; the at least one memory and the computer program code configured to, with the at least one processor, cause the device to: receive downlink transmission using at least one receive beam of the device; determine autonomous receive beam switch by the device; and in accordance with a determination that a receive timing difference between a primary cell and a secondary cell is higher than a receive timing difference threshold, perform the autonomous receive beam switch and allow: a demodulation performance degradation on up to a first proportion of symbols; or a demodulation performance degradation on up to a second proportion of slots.
  • the first proportion of symbols and the second proportion of slots are determined based on one or more periodicities of one or more downlink reference signals.
  • the first proportion of symbols is determined as a number of symbols impacted being divided by a number of symbols available during a duration associated with the one or more downlink reference signals.
  • the second proportion of slots is determined as a number of slots impacted being divided by a number of slots available during a duration associated with one or more downlink reference signals.
  • the number of symbols/slots impacted is one.
  • the one or more downlink reference signals comprise single reference signal for beam management, and the duration is determined at least based on a periodicity of the reference signal for beam management.
  • the one or more downlink reference signals comprise multiple reference signals for beam management with the same or different periodicities, and the duration is determined at least based on one of the following: a minimum one of periodicities of the multiple reference signals for beam management; a weighted periodicity for the multiple reference signals for beam management; or a smallest time distance between the multiple reference signals for beam management.
  • the one or more downlink reference signals comprise one or more reference signals for beam management on a first band for the primary cell and additional downlink reference signals on a second band for the secondary cell, and the duration is determined at least based on one of the following: a minimum one of periodicities of the one or more reference signals for beam management and the additional downlink reference signals; a weighted periodicity for the one or more reference signals for beam management and the additional downlink reference signals; a smallest time distance between one of the one or more reference signals for beam management and one of the additional downlink reference signals; or a smallest time distance between two of the additional downlink reference signals.
  • the downlink reference signals comprises at least one of the following: a synchronization signal block; a channel state information reference signal; a reference signal for radio link monitoring; a reference signal for beam failure detection; or a reference signal for beam management.
  • the allowed demodulation performance degradation on up to the first proportion of symbols or the allowed demodulation performance degradation on up to the second proportion of slots is determined considering the measurement relaxation for radio link monitoring and/or beam failure detection.
  • the first proportion of symbols or the second proportion of slots is determined based on a periodicity of a reference signal for radio link monitoring and/or a reference signal for beam failure detection multiplied by a relaxation factor.
  • an apparatus comprises: means for receiving downlink transmission using at least one receive beam of a terminal device; means for determining autonomous receive beam switch by the terminal device, and means for, in accordance with a determination that a receive timing difference between a primary cell and a secondary cell is higher than a receive timing difference threshold, performing the autonomous receive beam switch and allowing: a demodulation performance degradation on up to a first proportion of symbols; or a demodulation performance degradation on up to a second proportion of slots.
  • the first proportion of symbols and the second proportion of slots are determined based on one or more periodicities of one or more downlink reference signals.
  • the first proportion of symbols is determined as a number of symbols impacted being divided by a number of symbols available during a duration associated with the one or more downlink reference signals.
  • the second proportion of slots is determined as a number of slots impacted being divided by a number of slots available during a duration associated with one or more downlink reference signals.
  • the number of symbols/slots impacted is one.
  • the one or more downlink reference signals comprise single reference signal for beam management, and the duration is determined at least based on a periodicity of the reference signal for beam management.
  • the one or more downlink reference signals comprise multiple reference signals for beam management with the same or different periodicities, and the duration is determined at least based on one of the following: a minimum one of periodicities of the multiple reference signals for beam management; a weighted periodicity for the multiple reference signals for beam management; or a smallest time distance between the multiple reference signals for beam management.
  • the one or more downlink reference signals comprise one or more reference signals for beam management on a first band for the primary cell and additional downlink reference signals on a second band for the secondary cell, and the duration is determined at least based on one of the following: a minimum one of periodicities of the one or more reference signals for beam management and the additional downlink reference signals; a weighted periodicity for the one or more reference signals for beam management and the additional downlink reference signals; a smallest time distance between one of the one or more reference signals for beam management and one of the additional downlink reference signals; or a smallest time distance between two of the additional downlink reference signals.
  • the downlink reference signals comprises at least one of the following: a synchronization signal block; a channel state information reference signal; a reference signal for radio link monitoring; a reference signal for beam failure detection; or a reference signal for beam management.
  • the allowed demodulation performance degradation on up to the first proportion of symbols or the allowed demodulation performance degradation on up to the second proportion of slots is determined considering the measurement relaxation for radio link monitoring and/or beam failure detection.
  • the first proportion of symbols or the second proportion of slots is determined based on a periodicity of a reference signal for radio link monitoring and/or a reference signal for beam failure detection multiplied by a relaxation factor.
  • a computer readable storage medium comprises program instructions stored thereon, the instructions, when executed by a processor of a device, causing the device to perform the method according to some example embodiments of the present disclosure.

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

Abstract

Des exemples de modes de réalisation de la présente divulgation ont trait à un dispositif, à un procédé, à un appareil et à un support de stockage lisible par ordinateur qui concernent des restrictions de dégradation des performances de démodulation au niveau d'un commutateur de faisceau de réception autonome d'un équipement d'utilisateur (UE). Dans des modes de réalisation donnés à titre d'exemple, le dispositif reçoit une transmission en liaison descendante à l'aide d'au moins un faisceau de réception du dispositif. En outre, le dispositif détermine un commutateur de faisceau de réception autonome par le dispositif. De plus, selon une détermination du fait qu'une différence de temps de réception entre une cellule principale et une cellule secondaire est supérieure à un seuil de différence de temps de réception, le dispositif exécute le commutateur de faisceau de réception autonome et permet : une dégradation des performances de démodulation sur une première proportion de symboles au maximum ; ou une dégradation des performances de démodulation sur une seconde proportion de créneaux au maximum.
PCT/CN2022/077526 2022-02-23 2022-02-23 Dégradation des performances de démodulation au niveau d'un commutateur de faisceau de réception autonome d'un ue WO2023159403A1 (fr)

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PCT/CN2022/077526 WO2023159403A1 (fr) 2022-02-23 2022-02-23 Dégradation des performances de démodulation au niveau d'un commutateur de faisceau de réception autonome d'un ue
CN202310144212.6A CN116647885A (zh) 2022-02-23 2023-02-21 Ue自主接收波束切换的解调性能劣化

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Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190238209A1 (en) * 2018-01-29 2019-08-01 Qualcomm Incorporated Autonomous reception beam refinement and tracking
US20210307033A1 (en) * 2020-03-31 2021-09-30 Qualcomm Incorporated Mitigating receive time difference when using a single beam in inter-band carrier aggregation

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190238209A1 (en) * 2018-01-29 2019-08-01 Qualcomm Incorporated Autonomous reception beam refinement and tracking
US20210307033A1 (en) * 2020-03-31 2021-09-30 Qualcomm Incorporated Mitigating receive time difference when using a single beam in inter-band carrier aggregation

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
ERICSSON: "Analysis of UE transmit timing adjustment under beam switching in FR2", 3GPP DRAFT; R4-1901623 UE TIMING BEAM SWITCH, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG4, no. Athens, Greece; 20190225 - 20190301, 15 February 2019 (2019-02-15), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France , XP051606195 *

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