WO2021159292A1 - Procédés et appareil de commutation de relation spatiale pour communication nr - Google Patents

Procédés et appareil de commutation de relation spatiale pour communication nr Download PDF

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Publication number
WO2021159292A1
WO2021159292A1 PCT/CN2020/074812 CN2020074812W WO2021159292A1 WO 2021159292 A1 WO2021159292 A1 WO 2021159292A1 CN 2020074812 W CN2020074812 W CN 2020074812W WO 2021159292 A1 WO2021159292 A1 WO 2021159292A1
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WO
WIPO (PCT)
Prior art keywords
spatial relation
shall
srs
configuration
qcled
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Application number
PCT/CN2020/074812
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English (en)
Inventor
Zhixun Tang
Tsang-Wei Yu
Hsuan-Li Lin
Original Assignee
Mediatek Singapore Pte. Ltd.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Mediatek Singapore Pte. Ltd. filed Critical Mediatek Singapore Pte. Ltd.
Priority to PCT/CN2020/074812 priority Critical patent/WO2021159292A1/fr
Priority to CN202110143540.5A priority patent/CN113259953B/zh
Priority to US17/171,075 priority patent/US20210250949A1/en
Priority to TW110105013A priority patent/TWI815083B/zh
Priority to EP21156764.9A priority patent/EP3869897B1/fr
Publication of WO2021159292A1 publication Critical patent/WO2021159292A1/fr

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    • 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
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/24—Cell structures
    • H04W16/28—Cell structures using beam steering

Definitions

  • This disclosure relates generally to wireless communications, and, more particularly, to methods and apparatus for the spatial relation switching of NR communications.
  • spatial relation is signalling by network to indicate the QCL-type to UE for uplink channels and RSs.
  • ⁇ QCL-TypeA, QCL-TypeB, QCL-TypeC ⁇ is related to channel statistical character.
  • ⁇ QCL-TypeD ⁇ is related to spatial Tx parameters which is the parameter related to FR2 only.
  • the network can indicate the target spatial relation to UE to change the QCL-type by RRC reconfiguration, MAC-CE activation and DCI indication.
  • This disclosure relates generally to wireless communications, and, more particularly, to methods and apparatus for the active spatial relation switching design of NR communications.
  • the configured spatial relation can be QCLed to the source of DL RS, such as SSB or CSI-RS, where the terminology ‘QCLed’ means associated to in the document below.
  • the active spatial relation switching shall differentiate known and unknown situation.
  • known condition when UE receives the spatial relation switching configuration, the UE shall parse this configuration and execute the fine timing tracking on the new configured QCLed RS. After that, the UE shall switch its spatial relation to the new configuration.
  • the UE In unknown condition, besides the above procedure, the UE shall also execute the L1-RSRP measurement after UE parse the spatial relation configuration and before the fine timing tracking.
  • the configured spatial relation can be QCLed to the root source of UL SRS.
  • the active spatial relation switching don’t need to differentiate known and unknown situation.
  • the UE shall parse this configuration and switch the spatial relation followed with the configured SRS index.
  • This spatial relation switching shall apply for PUSCH, PUCCH, and SRS.
  • PUCCH the MAC based spatial relation switch shall be defined.
  • PUSCH spatial relation activation shall only follow the related PUCCH or SRS spatial relation switch procedure.
  • periodic SRS the RRC based spatial relation switch shall be defined.
  • semi-persistent SRS the MAC based spatial relation switch shall be defined.
  • aperiodic SRS the DCI based spatial relation switch shall be defined. The aperiodic SRS should always associate with a known spatial relation.
  • FIG. 1 shows a wireless communication system according to an embodiment of the disclosure.
  • FIG. 2 shows an example of spatial relation switching.
  • FIG. 3 shows examples of uplink QCLed relation source.
  • FIG. 4 shows an example of spatial relation switching procedure when the configured spatial relation is QCLed to a DL RS.
  • FIG. 5 shows an example of spatial relation switching procedure when the configured spatial relation is QCLed to a SRS.
  • FIG. 6 shows an example of PUCCH spatial relation switching.
  • FIG. 7 shows an example of PUSCH spatial relation switching.
  • FIG. 8 shows an example of SRS spatial relation switching.
  • FIG. 9 shows an exemplary block diagram of a UE (a.k.a device) according to an embodiment of the disclosure.
  • FIG. 1 shows a wireless communication system 100 according to an embodiment of the disclosure.
  • the system 100 can include a user equipment (UE) 110 and a base station (BS) 120.
  • the system 100 can be a cellular network, and employ the New Radio (NR) technologies and the LTE technologies developed by the 3rd Generation Partnership Project (3GPP) for wireless communications between the UE 110 and the BS 120.
  • the UE 110 can be a mobile phone, a laptop computer, a device carried in a vehicle, and the like.
  • the BS 120 can be an implementation of a gNB specified in NR standards. Accordingly, the UE 110 can communicate with the base station 120 through a wireless communication channel according to communication protocols specified in respective communication standards. Please note that the invention is not limited by this.
  • the UE 110 and the base station 120 are configured to deploy carrier aggregation (CA) or dual-connection (DC) techniques to enhance UE’s throughput.
  • CA carrier aggregation
  • DC dual-connection
  • the MCG 130 includes Pcell 131 and SCell 1 132 to SCell N 133.
  • the system When the system deploy the DC, it could have Master Cell Group (MCG) 130 and Secondary Cell Group (SCG) 140.
  • MCG 130 includes Pcell 131 and SCell 1 132 to SCell N 133.
  • SCG 140 includes PScell 141 and SCell 1 142 to SCell N 143.
  • FIG. 2 shows an example of spatial relation switching when the spatial relation is configured to QCLed with a DL RSs, where, the terminology ‘QCLed’ can also be said as associated.
  • the network configured the spatial relation to request the UE to use Tx1 to transmit the signals.
  • the network used the Rx3 to receive the transmission signals.
  • the network detects UE to use Tx3 better than to use Tx1.
  • the network configure the new spatial relation configuration to request the UE switch its Tx beam from Tx1 to Tx3.
  • the network can use its Rx1 to receive the signals from UE.
  • FIG. 3 shows two examples of spatial relation QCLed source RSs’ definition.
  • a PUSCH channel 310 is configured a spatial relation to QCLed with SRS index #0 320, and this SRS #0 320 has already configured to QCLed with a DL SSB #0 330.
  • this source of PUSCH channel QCLed relation is DL RS, SSB #0.
  • the DL RS can be SRS or CSI-RS.
  • a PUSCH channel 340 is configured a spatial relation to QCLed with SRS index #0 350, and this SRS #0 350 no other QCLed relation was configured.
  • this SRS can be configured with ‘beamManagement’ .
  • this source of PUSCH channel QCLed relation is UL SRS, SRS #0.
  • FIG. 4 shows a procedure of spatial relation switching when the configured spatial relation is QCLed to a source DL RS.
  • the known and unknown condition shall be defined.
  • the QCLed source is a DL RS, such as SSB or CSI-RS
  • the configured spatial relation is known if it has been meeting the following conditions:
  • the UE has sent at least 1 measurement report for the target spatial relation
  • the spatial relation shall remain detectable during the spatial relation switching period
  • the network may configure the UE to switch to a new spatial relation.
  • the UE When UE receives the spatial relation switch command, the UE only need to decode the command and execute one-shot fine timing tracking. After that, the UE will finish the active spatial relation switch.
  • the network may configure the UE to switch to a new spatial relation without any measurement information.
  • the UE When UE receives the spatial relation switch command, the UE need to decode the command. After that, execute Rx beam sweeping to find the best Rx beam and do the one-shot fine timing tracking. After that, the UE will finish the active spatial relation switch.
  • the UE When the spatial relation is unknown, the UE should execute the L1-RSRP measurement (Rx beam sweeping) to train the downlink spatial domain filter before transmitting the uplink signals with the same spatial domain transmission filter.
  • the UE only has the previous spatial relation information (which UE adopted before receiving the switch command) and also this information is known to network. Thus, UE shall be allowed to be transmitted signals with previous spatial domain transmission filter, but the signal quality cannot be guaranteed before UE finishes the active spatial relation switching.
  • FIG. 5 shows a procedure of spatial relation switching when the configured spatial relation is QCLed to a source SRS. After some QCLed links, the spatial relation shall be QCLed with SRS with its usage configured as ‘beamManagement’ .
  • the network can configure some spatial relation lists to UE 510. Then the network directly configure a new spatial relation with SRS index to UE 520. When UE parses the spatial relation QCLed to a SRS index 530, UE will only follow the same beam with this uplink SRS 540.
  • FIG. 6 shows a procedure of spatial relation switching for PUCCH.
  • RRC is required at first to configure with up to 8 spatial relations 610.
  • MAC CE activates one of the spatial relation for PUCCH 620.
  • the UE will transmit the PUCCH using a same Rx spatial domain filter as a reception of a SSB or CSI-RS or a transmission of a SRS.
  • the MAC based active spatial relation switch shall be defined when active spatial relation switches for PUCCH.
  • active spatial relation when active spatial relation is configured to switch to a DL RS, the UE requirements will be different for known and unknown case.
  • active spatial relation is configured to switch to a SRS, we only need to consider MAC CE parsing time.
  • FIG. 7 shows a procedure of spatial relation switching for PUSCH.
  • PUSCH spatial relation is explicitly demonstrated and follows either the PUCCH or SRS spatial relation depending on the DCI command received, i.e., DCI format 0_0 or 0_1.
  • PUSCH When DCI format 0_0 is received, PUSCH always follows the same spatial domain transmission filter as for PUCCH 710.
  • DCI format 0_1 When DCI format 0_1 is configured, the UE shall transmit PUSCH using the same antenna ports as the SRS port (s) in the SRS resource (s) indicated by SRI (s) 730.
  • the indicated SRI in slot n is associated with the most recent transmission of SRS resource identified by the SRI.
  • PUSCH spatial relation activation shall only follow the related PUCCH or SRS spatial relation switch procedure.
  • FIG. 8 shows a procedure of spatial relation switching for SRS.
  • the SRS resources also can be periodic, semi-persistent, or aperiodic.
  • Periodic SRS is configured by RRC 810.
  • Semi-persistent SRS is activated by MAC-CE 840.
  • Aperiodic SRS is triggered/activated by DCI command 870.
  • UE will directly use the same beam for this uplink SRS. UE does not need the additional Rx beam sweeping time.
  • the active spatial relation switch shall differentiate between known and unknown condition.
  • aperiodic SRS For aperiodic SRS, generally, it could be believed as an urgent sounding behaviour. It means the network doesn’t want additional beam training time and needs this sounding information as soon as possible.
  • the time interval between the DCI command and the aperiodic SRS transmission is a very short time duration. Thus, the aperiodic SRS should always associate with a known spatial relation.
  • FIG. 9 shows an exemplary block diagram of a UE according to an embodiment of the disclosure.
  • the UE 900 can be configured to implement various embodiments of the disclosure described herein.
  • the UE 900 can include a processor 910, a memory 920, and a radio frequency (RF) module 930 that are coupled together as shown in FIG. 9.
  • RF radio frequency
  • the UE 900 can be a mobile phone, a tablet computer, a desktop computer, a vehicle carried device, and the like.
  • the processor 910 can be configured to perform various functions of the UE 120 described above with reference to FIGs. 1-8.
  • the processor 910 can include signal processing circuitry to process received or to be transmitted data according to communication protocols specified in, for example, LTE and NR standards. Additionally, the processor 910 may execute program instructions, for example, stored in the memory 920, to perform functions related with different communication protocols.
  • the processor 910 can be implemented with suitable hardware, software, or a combination thereof.
  • the processor 910 can be implemented with application specific integrated circuits (ASIC) , field programmable gate arrays (FPGA) , and the like, that includes circuitry.
  • ASIC application specific integrated circuits
  • FPGA field programmable gate arrays
  • the circuitry can be configured to perform various functions of the processor 910.
  • the memory 920 can store program instructions that, when executed by the processor 910, cause the processor 910 to perform various functions as described herein.
  • the memory 920 can include a read only memory (ROM) , a random access memory (RAM) , a flash memory, a solid state memory, a hard disk drive, and the like.
  • the RF module 930 can be configured to receive a digital signal from the processor 510 and accordingly transmit a signal to a base station in a wireless communication network via an antenna 940.
  • the RF module 930 can be configured to receive a wireless signal from a base station and accordingly generate a digital signal which is provided to the processor 910.
  • the RF module 930 can include digital to analog/analog to digital converters (DAC/ADC) , frequency down/up converters, filters, and amplifiers for reception and transmission operations.
  • DAC/ADC digital to analog/analog to digital converters
  • the RF module 930 can include converter circuits, filter circuits, amplification circuits, and the like, for processing signals on different carriers or bandwidth parts.
  • the UE 900 can optionally include other components, such as input and output devices, additional CPU or signal processing circuitry, and the like. Accordingly, the UE 500 may be capable of performing other additional functions, such as executing application programs, and processing alternative communication protocols.
  • the processes and functions described herein can be implemented as a computer program which, when executed by one or more processors, can cause the one or more processors to perform the respective processes and functions.
  • the computer program may be stored or distributed on a suitable medium, such as an optical storage medium or a solid-state medium supplied together with, or as part of, other hardware.
  • the computer program may also be distributed in other forms, such as via the Internet or other wired or wireless telecommunication systems.
  • the computer program can be obtained and loaded into an apparatus, including obtaining the computer program through physical medium or distributed system, including, for example, from a server connected to the Internet.
  • the computer program may be accessible from a computer-readable medium providing program instructions for use by or in connection with a computer or any instruction execution system.
  • a computer readable medium may include any apparatus that stores, communicates, propagates, or transports the computer program for use by or in connection with an instruction execution system, apparatus, or device.
  • the computer-readable medium can be magnetic, optical, electronic, electromagnetic, infrared, or semiconductor system (or apparatus or device) or a propagation medium.
  • the computer-readable medium may include a computer-readable non-transitory storage medium such as a semiconductor or solid state memory, magnetic tape, a removable computer diskette, a random access memory (RAM) , a read-only memory (ROM) , a magnetic disk and an optical disk, and the like.
  • the computer-readable non-transitory storage medium can include all types of computer readable medium, including magnetic storage medium, optical storage medium, flash medium and solid state storage medium.

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Spinning Or Twisting Of Yarns (AREA)
  • Transmitters (AREA)

Abstract

La relation spatiale configurée peut être quasi-colocalisée avec la source d'un DL RS, tel un SSB ou un CSI-RS, le terme « quasi-colocalisé » signifiant « associé à » dans le document ci-après. Dans cette relation quasi-colocalisée, la commutation de relation spatiale active doit différencier une situation connue d'une situation inconnue. Dans une condition connue, lorsque l'UE reçoit la configuration de commutation de relation spatiale, l'UE doit analyser cette configuration et exécuter le suivi de synchronisation fin sur le nouveau RS quasi-colocalisé configuré. Puis l'UE doit commuter sa relation spatiale dans la nouvelle configuration. Dans une condition inconnue, outre la procédure susmentionnée, l'UE doit également exécuter la mesure de L1-RSRP lorsque l'UE a analysé la configuration de relation spatiale et avant le suivi de synchronisation fin. La relation spatiale configurée peut être quasi-colocalisée avec la source racine d'un UL SRS. Dans cette relation quasi-colocalisée, la commutation de la relation spatiale active n'a pas à différencier une situation connue d'une situation inconnue. Lorsque l'UE reçoit la configuration de commutation de relation spatiale, l'UE analyse cette configuration et commute la relation spatiale suivie de l'indice de SRS configuré. Cette commutation de relation spatiale doit s'appliquer aux PUSCH, PUCCH et SRS. Dans un PUCCH, le commutateur de relation spatiale sur la base d'un MAC doit être défini. Dans un PUSCH, une activation de relation spatiale doit suivre uniquement la procédure de commutation de relation spatiale d'un PUCCH ou d'un SRS associé. Dans un SRS périodique, le commutateur de relation spatiale sur la base d'un RRC doit être défini. Dans un SRS semi-persistant, le commutateur de relation spatiale sur la base d'un MAC doit être défini. Dans un SRS apériodique, le commutateur de relation spatiale sur la base de DCI doit être défini. Le SRS apériodique doit toujours être associé à une relation spatiale connue.
PCT/CN2020/074812 2020-02-12 2020-02-12 Procédés et appareil de commutation de relation spatiale pour communication nr WO2021159292A1 (fr)

Priority Applications (5)

Application Number Priority Date Filing Date Title
PCT/CN2020/074812 WO2021159292A1 (fr) 2020-02-12 2020-02-12 Procédés et appareil de commutation de relation spatiale pour communication nr
CN202110143540.5A CN113259953B (zh) 2020-02-12 2021-02-02 空间关系切换方法和用户设备
US17/171,075 US20210250949A1 (en) 2020-02-12 2021-02-09 Methods and Apparatus of Spatial Relation Switching in New Radio System
TW110105013A TWI815083B (zh) 2020-02-12 2021-02-09 空間關係切換方法與使用者設備
EP21156764.9A EP3869897B1 (fr) 2020-02-12 2021-02-12 Procédés et appareil de commutation de relation spatiale dans un nouveau système radio

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PL3776900T3 (pl) * 2018-03-28 2022-01-10 Telefonaktiebolaget Lm Ericsson (Publ) Skuteczne wskazanie relacji przestrzennych dla zasobów fizycznego kanału sterowania łącza w górę (PUCCH)
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US20190190582A1 (en) * 2017-12-19 2019-06-20 Samsung Electronics Co., Ltd. Method and apparatus for beam reporting in next generation wireless systems
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TW202131736A (zh) 2021-08-16
CN113259953B (zh) 2024-05-10
TWI815083B (zh) 2023-09-11

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