WO2021138835A1 - Transmission d'informations de système économe en énergie dans un relais de liaison latérale à ondes millimétriques - Google Patents

Transmission d'informations de système économe en énergie dans un relais de liaison latérale à ondes millimétriques Download PDF

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Publication number
WO2021138835A1
WO2021138835A1 PCT/CN2020/070876 CN2020070876W WO2021138835A1 WO 2021138835 A1 WO2021138835 A1 WO 2021138835A1 CN 2020070876 W CN2020070876 W CN 2020070876W WO 2021138835 A1 WO2021138835 A1 WO 2021138835A1
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WIPO (PCT)
Prior art keywords
sis
relay
wakeup signal
sidelink
system information
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PCT/CN2020/070876
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English (en)
Inventor
Min Huang
Chao Wei
Jing Dai
Qiaoyu Li
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Qualcomm Incorporated
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Priority to PCT/CN2020/070876 priority Critical patent/WO2021138835A1/fr
Publication of WO2021138835A1 publication Critical patent/WO2021138835A1/fr

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    • 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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0229—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a wanted signal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0245—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal according to signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0261—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level
    • H04W52/0274—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof
    • H04W52/028—Power saving arrangements in terminal devices managing power supply demand, e.g. depending on battery level by switching on or off the equipment or parts thereof switching on or off only a part of the equipment circuit blocks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/04—Terminal devices adapted for relaying to or from another terminal or user
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for energy-efficient system information transmission in millimeter wave sidelink relaying.
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, and broadcasts.
  • Typical wireless communication systems may employ multiple-access technologies capable of supporting communication with multiple users by sharing available system resources (e.g., bandwidth, transmit power, and/or the like) .
  • multiple-access technologies include code division multiple access (CDMA) systems, time division multiple access (TDMA) systems, frequency-division multiple access (FDMA) systems, orthogonal frequency-division multiple access (OFDMA) systems, single-carrier frequency-division multiple access (SC-FDMA) systems, time division synchronous code division multiple access (TD-SCDMA) systems, and Long Term Evolution (LTE) .
  • LTE/LTE-Advanced is a set of enhancements to the Universal Mobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • UMTS Universal Mobile Telecommunications System
  • a wireless communication network may include a number of base stations (BSs) that can support communication for a number of user equipment (UEs) .
  • a user equipment (UE) may communicate with a base station (BS) via the downlink and uplink.
  • the downlink (or forward link) refers to the communication link from the BS to the UE
  • the uplink (or reverse link) refers to the communication link from the UE to the BS.
  • a BS may be referred to as a Node B, a gNB, an access point (AP) , a radio head, a transmit receive point (TRP) , a New Radio (NR) BS, a 5G Node B, and/or the like.
  • New Radio which may also be referred to as 5G, is a set of enhancements to the LTE mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • 3GPP Third Generation Partnership Project
  • NR is designed to better support mobile broadband Internet access by improving spectral efficiency, lowering costs, improving services, making use of new spectrum, and better integrating with other open standards using orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) (CP-OFDM) on the downlink (DL) , using CP-OFDM and/or SC-FDM (e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM) ) on the uplink (UL) , as well as supporting beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.
  • OFDM orthogonal frequency division multiplexing
  • SC-FDM e.g., also known as discrete Fourier transform spread OFDM (DFT-s-OFDM)
  • DFT-s-OFDM discrete Fourier transform spread OFDM
  • MIMO multiple-input multiple-output
  • a method of wireless communication may include: transmitting, on a sidelink, a first set of system information signals (F-SIS) using multiple wide beams that are beam swept over an aggregate coverage area associated with the relay UE; receiving, on the sidelink, a wakeup signal in a wakeup signal occasion associated with one of the multiple wide beams used to transmit the F-SIS; and transmitting, on the sidelink, a second set of system information signals (S-SIS) associated with the wakeup signal occasion in which the wakeup signal is received, wherein the S-SIS is transmitted using multiple narrow beams that are beam swept over a portion of the aggregate coverage area associated with the relay UE.
  • F-SIS system information signals
  • S-SIS system information signals
  • a method of wireless communication may include: receiving an F-SIS on a sidelink, wherein the F-SIS is transmitted by a relay UE using multiple wide beams that are beam swept over an aggregate coverage area associated with the relay UE; transmitting, on the sidelink, a wakeup signal to the relay UE in a wakeup signal occasion associated with one of the multiple wide beams used to transmit the F-SIS; and receiving, on the sidelink, an S-SIS associated with the wakeup signal occasion in which the wakeup signal is transmitted, wherein the S-SIS is transmitted by the relay UE using multiple narrow beams that are beam swept over a portion of the aggregate coverage area associated with the relay UE.
  • a relay UE for wireless communication may include a memory and one or more processors operatively coupled to the memory.
  • the memory and the one or more processors may be configured to: transmit, on a sidelink, an F-SIS using multiple wide beams that are beam swept over an aggregate coverage area associated with the relay UE; receive, on the sidelink, a wakeup signal in a wakeup signal occasion associated with one of the multiple wide beams used to transmit the F-SIS; and transmit, on the sidelink, an S-SIS associated with the wakeup signal occasion in which the wakeup signal is received, wherein the S-SIS is transmitted using multiple narrow beams that are beam swept over a portion of the aggregate coverage area associated with the relay UE.
  • a remote UE for wireless communication may include a memory and one or more processors operatively coupled to the memory.
  • the memory and the one or more processors may be configured to: receive an F-SIS on a sidelink, wherein the F-SIS is transmitted by a relay UE using multiple wide beams that are beam swept over an aggregate coverage area associated with the relay UE; transmit, on the sidelink, a wakeup signal to the relay UE in a wakeup signal occasion associated with one of the multiple wide beams used to transmit the F-SIS; and receive, on the sidelink, an S-SIS associated with the wakeup signal occasion in which the wakeup signal is transmitted, wherein the S-SIS is transmitted by the relay UE using multiple narrow beams that are beam swept over a portion of the aggregate coverage area associated with the relay UE.
  • a non-transitory computer-readable medium may store one or more instructions for wireless communication.
  • the one or more instructions when executed by one or more processors of a relay UE, may cause the one or more processors to: transmit, on a sidelink, an F-SIS using multiple wide beams that are beam swept over an aggregate coverage area associated with the relay UE; receive, on the sidelink, a wakeup signal in a wakeup signal occasion associated with one of the multiple wide beams used to transmit the F-SIS; and transmit, on the sidelink, an S-SIS associated with the wakeup signal occasion in which the wakeup signal is received, wherein the S-SIS is transmitted using multiple narrow beams that are beam swept over a portion of the aggregate coverage area associated with the relay UE.
  • a non-transitory computer-readable medium may store one or more instructions for wireless communication.
  • the one or more instructions when executed by one or more processors of a remote UE, may cause the one or more processors to: receive an F-SIS on a sidelink, wherein the F-SIS is transmitted by a relay UE using multiple wide beams that are beam swept over an aggregate coverage area associated with the relay UE; transmit, on the sidelink, a wakeup signal to the relay UE in a wakeup signal occasion associated with one of the multiple wide beams used to transmit the F-SIS; and receive, on the sidelink, an S-SIS associated with the wakeup signal occasion in which the wakeup signal is transmitted, wherein the S-SIS is transmitted by the relay UE using multiple narrow beams that are beam swept over a portion of the aggregate coverage area associated with the relay UE.
  • an apparatus for wireless communication may include: means for transmitting, on a sidelink, an F-SIS using multiple wide beams that are beam swept over an aggregate coverage area associated with the apparatus; means for receiving, on the sidelink, a wakeup signal in a wakeup signal occasion associated with one of the multiple wide beams used to transmit the F-SIS; and means for transmitting, on the sidelink, an S-SIS associated with the wakeup signal occasion in which the wakeup signal is received, wherein the S-SIS is transmitted using multiple narrow beams that are beam swept over a portion of the aggregate coverage area associated with the apparatus.
  • an apparatus for wireless communication may include: means for receiving an F-SIS on a sidelink, wherein the F-SIS is transmitted by a relay UE using multiple wide beams that are beam swept over an aggregate coverage area associated with the relay UE; means for transmitting, on the sidelink, a wakeup signal to the relay UE in a wakeup signal occasion associated with one of the multiple wide beams used to transmit the F-SIS; and means for receiving, on the sidelink, an S-SIS associated with the wakeup signal occasion in which the wakeup signal is transmitted, wherein the S-SIS is transmitted by the relay UE using multiple narrow beams that are beam swept over a portion of the aggregate coverage area associated with the relay UE.
  • aspects generally include a method, apparatus, system, computer program product, non-transitory computer-readable medium, user equipment, base station, wireless communication device, and/or processing system as substantially described herein with reference to and as illustrated by the accompanying drawings and specification.
  • Fig. 1 is a block diagram conceptually illustrating an example of a wireless communication network, in accordance with various aspects of the present disclosure.
  • Fig. 2 is a block diagram conceptually illustrating an example of a base station in communication with a UE in a wireless communication network, in accordance with various aspects of the present disclosure.
  • Figs. 3A-3C are diagrams illustrating one or more examples of energy-efficient system information transmission in millimeter wave sidelink relaying, in accordance with various aspects of the present disclosure.
  • Figs. 4-5 are diagrams illustrating example processes performed, for example, by a UE, in accordance with various aspects of the present disclosure.
  • Fig. 1 is a diagram illustrating a wireless network 100 in which aspects of the present disclosure may be practiced.
  • the wireless network 100 may be an LTE network or some other wireless network, such as a 5G or NR network.
  • the wireless network 100 may include a number of BSs 110 (shown as BS 110a, BS 110b, BS 110c, and BS 110d) and other network entities.
  • a BS is an entity that communicates with user equipment (UEs) and may also be referred to as a base station, a NR BS, a Node B, a gNB, a 5G node B (NB) , an access point, a transmit receive point (TRP) , and/or the like.
  • Each BS may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to a coverage area of a BS and/or a BS subsystem serving this coverage area, depending on the context in which the term is used.
  • a BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or another type of cell.
  • a macro cell may cover a relatively large geographic area (e.g., several kilometers in radius) and may allow unrestricted access by UEs with service subscription.
  • a pico cell may cover a relatively small geographic area and may allow unrestricted access by UEs with service subscription.
  • a femto cell may cover a relatively small geographic area (e.g., a home) and may allow restricted access by UEs having association with the femto cell (e.g., UEs in a closed subscriber group (CSG) ) .
  • a BS for a macro cell may be referred to as a macro BS.
  • a BS for a pico cell may be referred to as a pico BS.
  • a BS for a femto cell may be referred to as a femto BS or a home BS.
  • a BS 110a may be a macro BS for a macro cell 102a
  • a BS 110b may be a pico BS for a pico cell 102b
  • a BS 110c may be a femto BS for a femto cell 102c.
  • a BS may support one or multiple (e.g., three) cells.
  • eNB base station
  • NR BS NR BS
  • gNB gNode B
  • AP AP
  • node B node B
  • 5G NB 5G NB
  • cell may be used interchangeably herein.
  • a cell may not necessarily be stationary, and the geographic area of the cell may move according to the location of a mobile BS.
  • the BSs may be interconnected to one another and/or to one or more other BSs or network nodes (not shown) in the wireless network 100 through various types of backhaul interfaces such as a direct physical connection, a virtual network, and/or the like using any suitable transport network.
  • Wireless network 100 may also include relay stations.
  • a relay station is an entity that can receive a transmission of data from an upstream station (e.g., a BS or a UE) and send a transmission of the data to a downstream station (e.g., a UE or a BS) .
  • a relay station may also be a UE that can relay transmissions for other UEs.
  • a relay station 110d may communicate with macro BS 110a and a UE 120d in order to facilitate communication between BS 110a and UE 120d.
  • a relay station may also be referred to as a relay BS, a relay base station, a relay, and/or the like.
  • Wireless network 100 may be a heterogeneous network that includes BSs of different types, e.g., macro BSs, pico BSs, femto BSs, relay BSs, and/or the like. These different types of BSs may have different transmit power levels, different coverage areas, and different impacts on interference in wireless network 100.
  • macro BSs may have a high transmit power level (e.g., 5 to 40 Watts) whereas pico BSs, femto BSs, and relay BSs may have lower transmit power levels (e.g., 0.1 to 2 Watts) .
  • a network controller 130 may couple to a set of BSs and may provide coordination and control for these BSs.
  • Network controller 130 may communicate with the BSs via a backhaul.
  • the BSs may also communicate with one another, e.g., directly or indirectly via a wireless or wireline backhaul.
  • UEs 120 may be dispersed throughout wireless network 100, and each UE may be stationary or mobile.
  • a UE may also be referred to as an access terminal, a terminal, a mobile station, a subscriber unit, a station, and/or the like.
  • a UE may be a cellular phone (e.g., a smart phone) , a personal digital assistant (PDA) , a wireless modem, a wireless communication device, a handheld device, a laptop computer, a cordless phone, a wireless local loop (WLL) station, a tablet, a camera, a gaming device, a netbook, a smartbook, an ultrabook, a medical device or equipment, biometric sensors/devices, wearable devices (smart watches, smart clothing, smart glasses, smart wrist bands, smart jewelry (e.g., smart ring, smart bracelet) ) , an entertainment device (e.g., a music or video device, or a satellite radio) , a vehicular component or sensor, smart meters/sensors, industrial manufacturing equipment, a global positioning system device, or any other suitable device that is configured to communicate via a wireless or wired medium.
  • PDA personal digital assistant
  • WLL wireless local loop
  • MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, and/or the like, that may communicate with a base station, another device (e.g., remote device) , or some other entity.
  • a wireless node may provide, for example, connectivity for or to a network (e.g., a wide area network such as Internet or a cellular network) via a wired or wireless communication link.
  • Some UEs may be considered Internet-of-Things (IoT) devices, and/or may be implemented as NB-IoT (narrowband internet of things) devices.
  • Some UEs may be considered a Customer Premises Equipment (CPE) .
  • UE 120 may be included inside a housing that houses components of UE 120, such as processor components, memory components, and/or the like.
  • any number of wireless networks may be deployed in a given geographic area.
  • Each wireless network may support a particular radio access technology (RAT) and may operate on one or more frequencies.
  • a RAT may also be referred to as a radio technology, an air interface, and/or the like.
  • a frequency may also be referred to as a carrier, a frequency channel, and/or the like.
  • Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs.
  • NR or 5G RAT networks may be deployed.
  • two or more UEs 120 may communicate directly using one or more sidelink channels (e.g., without using a base station 110 as an intermediary to communicate with one another) .
  • the UEs 120 may communicate using peer-to-peer (P2P) communications, device-to-device (D2D) communications, a vehicle-to-everything (V2X) protocol (e.g., which may include a vehicle-to-vehicle (V2V) protocol, a vehicle-to-infrastructure (V2I) protocol, and/or the like) , a mesh network, and/or the like.
  • V2X vehicle-to-everything
  • the UE 120 may perform scheduling operations, resource selection operations, and/or other operations described elsewhere herein as being performed by the base station 110.
  • the base station 110 and/or the UE 120 may be capable of communicating (e.g., transmitting and/or receiving) using millimeter waves.
  • the base station 110 and/or the UE 120 may use beamforming to focus a directional millimeter wave beam.
  • the base station 110 and/or the UE 120 may use such beams to establish initial millimeter wave links, for control communications, for data communications (e.g., steady state data rate communications, peak data rate communications, and/or the like) , and/or the like.
  • Beamforming may be achieved using an antenna array by combining antenna elements in the antenna array such that signals at particular angles experience constructive interference while signals at other angles experience destructive interference.
  • the base station 110 and/or the UE 120 may use millimeter wave beams to communicate with other devices (e.g., via BS-to-UE communication, UE-to-UE communication, BS-to-BS communication, and/or the like) .
  • Fig. 1 is provided as an example. Other examples may differ from what is described with regard to Fig. 1.
  • Fig. 2 shows a block diagram of a design 200 of base station 110 and UE 120, which may be one of the base stations and one of the UEs in Fig. 1.
  • Base station 110 may be equipped with T antennas 234a through 234t
  • UE 120 may be equipped with R antennas 252a through 252r, where in general T ⁇ 1 and R ⁇ 1.
  • a transmit processor 220 may receive data from a data source 212 for one or more UEs, select one or more modulation and coding schemes (MCS) for each UE based at least in part on channel quality indicators (CQIs) received from the UE, process (e.g., encode and modulate) the data for each UE based at least in part on the MCS (s) selected for the UE, and provide data symbols for all UEs. Transmit processor 220 may also process system information (e.g., for semi-static resource partitioning information (SRPI) and/or the like) and control information (e.g., CQI requests, grants, upper layer signaling, and/or the like) and provide overhead symbols and control symbols.
  • MCS modulation and coding schemes
  • Transmit processor 220 may also generate reference symbols for reference signals (e.g., the cell-specific reference signal (CRS) ) and synchronization signals (e.g., the primary synchronization signal (PSS) and secondary synchronization signal (SSS) ) .
  • a transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, the overhead symbols, and/or the reference symbols, if applicable, and may provide T output symbol streams to T modulators (MODs) 232a through 232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM and/or the like) to obtain an output sample stream.
  • TX transmit
  • MIMO multiple-input multiple-output
  • Each modulator 232 may process a respective output symbol stream (e.g., for OFDM and/or the like) to obtain an output sample stream.
  • Each modulator 232 may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal.
  • T downlink signals from modulators 232a through 232t may be transmitted via T antennas 234a through 234t, respectively.
  • the synchronization signals can be generated with location encoding to convey additional information.
  • antennas 252a through 252r may receive the downlink signals from base station 110 and/or other base stations and may provide received signals to demodulators (DEMODs) 254a through 254r, respectively.
  • Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a received signal to obtain input samples.
  • Each demodulator 254 may further process the input samples (e.g., for OFDM and/or the like) to obtain received symbols.
  • a MIMO detector 256 may obtain received symbols from all R demodulators 254a through 254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • a receive processor 258 may process (e.g., demodulate and decode) the detected symbols, provide decoded data for UE 120 to a data sink 260, and provide decoded control information and system information to a controller/processor 280.
  • a channel processor may determine reference signal received power (RSRP) , received signal strength indicator (RSSI) , reference signal received quality (RSRQ) , channel quality indicator (CQI) , and/or the like.
  • RSRP reference signal received power
  • RSSI received signal strength indicator
  • RSRQ reference signal received quality
  • CQI channel quality indicator
  • one or more components of UE 120 may be included in a housing.
  • a transmit processor 264 may receive and process data from a data source 262 and control information (e.g., for reports comprising RSRP, RSSI, RSRQ, CQI, and/or the like) from controller/processor 280. Transmit processor 264 may also generate reference symbols for one or more reference signals. The symbols from transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by modulators 254a through 254r (e.g., for DFT-s-OFDM, CP-OFDM, and/or the like) , and transmitted to base station 110.
  • modulators 254a through 254r e.g., for DFT-s-OFDM, CP-OFDM, and/or the like
  • the uplink signals from UE 120 and other UEs may be received by antennas 234, processed by demodulators 232, detected by a MIMO detector 236 if applicable, and further processed by a receive processor 238 to obtain decoded data and control information sent by UE 120.
  • Receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to controller/processor 240.
  • Base station 110 may include communication unit 244 and communicate to network controller 130 via communication unit 244.
  • Network controller 130 may include communication unit 294, controller/processor 290, and memory 292.
  • Controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component (s) of Fig. 2 may perform one or more techniques associated with energy-efficient system information transmission in millimeter wave sidelink relaying, as described in more detail elsewhere herein.
  • controller/processor 240 of base station 110, controller/processor 280 of UE 120, and/or any other component (s) of Fig. 2 may perform or direct operations of, for example, process 400 of Fig. 4, process 500 of Fig. 5, and/or other processes as described herein.
  • Memories 242 and 282 may store data and program codes for base station 110 and UE 120, respectively.
  • memory 242 and/or memory 282 may comprise a non-transitory computer-readable medium storing one or more instructions for wireless communication.
  • the one or more instructions when executed by one or more processors of the base station 110 and/or the UE 120, may perform or direct operations of, for example, process 400 of Fig. 4, process 500 of Fig. 5, and/or other processes as described herein.
  • a scheduler 246 may schedule UEs for data transmission on the downlink and/or uplink.
  • UE 120 may include means for transmitting, on a sidelink, a first set of system information signals (F-SIS) using multiple wide beams that are beam swept over an aggregate coverage area associated with UE 120, means for receiving, on the sidelink, a wakeup signal in a wakeup signal occasion associated with one of the multiple wide beams used to transmit the F-SIS, means for transmitting, on the sidelink, a second set of system information signals (S-SIS) associated with the wakeup signal occasion in which the wakeup signal is received using multiple narrow beams that are beam swept over a portion of the aggregate coverage area associated with UE 120, and/or the like.
  • such means may include one or more components of UE 120 described in connection with Fig. 2, such as controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and/or the like.
  • UE 120 may include means for receiving an F-SIS on a sidelink, wherein the F-SIS is transmitted by a relay UE 120 using multiple wide beams that are beam swept over an aggregate coverage area associated with the relay UE 120, means for transmitting, on the sidelink, a wakeup signal to the relay UE 120 in a wakeup signal occasion associated with one of the multiple wide beams used to transmit the F-SIS, means for receiving, on the sidelink, an S-SIS associated with the wakeup signal occasion in which the wakeup signal is transmitted, wherein the S-SIS is transmitted by the relay UE 120 using multiple narrow beams that are beam swept over a portion of the aggregate coverage area associated with the relay UE, and/or the like.
  • such means may include one or more components of UE 120 described in connection with Fig. 2, such as controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, and/or the like.
  • Fig. 2 is provided as an example. Other examples may differ from what is described with regard to Fig. 2.
  • a sidelink signal may refer to a signal communicated from one subordinate entity (e.g., a first UE) to another subordinate entity (e.g., a second UE) without relaying that communication through a scheduling entity (e.g., a base station, another UE, and/or the like) , even though the scheduling entity may be utilized for scheduling and/or control purposes.
  • a scheduling entity e.g., a base station, another UE, and/or the like
  • one real-world application of sidelink communications relates to UE-to-network relaying, where a relay UE located in a coverage area associated with a base station relays communications between the base station and one or more remote UEs.
  • the remote UE (s) may be located outside the coverage area associated with the base station, or certain conditions may hamper an ability of the remote UE (s) to communicate with the base station directly despite the remote UE (s) being located within the coverage area associated with the base station.
  • there may be a long distance between a remote UE and the base station e.g., when the remote UE is located at a far edge of the coverage area associated with the base station
  • a remote UE may have limited resources (e.g., weak receive capabilities, low transmit power, limited battery capacity, a small number of antennas) , and/or the like.
  • the relay UE may communicate with the base station on an uplink and a downlink (e.g., via a Uu interface) , and the relay UE may further connect to the remote UE on a sidelink (e.g., via a PC5 interface) .
  • the relay UE may communicate with the remote UE using one or more beams.
  • the relay UE may have multiple antenna elements to support beamforming using millimeter wave beams in a millimeter wave frequency band, sometimes referred to as frequency range 2 (FR2) .
  • FR2 frequency range 2
  • a millimeter wave beam may support a higher throughput than a transmission in a sub-6 GHz frequency band, sometimes referred to as frequency range 1 (FR1) .
  • the relay UE may support and/or configure different beam widths for a beam, which may change the range of the beam. For example, using a wider beam may result in a shorter range than a narrower beam, and using a narrower beam may result in a longer range than a wider beam. Accordingly, in cases where the relay UE has a large number of transmit and/or receive antennas, the relay UE can potentially extend a coverage range with narrow beams.
  • narrow beams can lead to increased power consumption at the relay UE and/or increased latency for sidelink communications between the relay UE and the remote UE because the narrow beams have to be swept over a larger number of beam directions (e.g., to cover a 120-degree coverage area, a 360-degree coverage area, and/or the like) .
  • the remote UE may generally search for a relay UE that is located nearby and able to perform UE-to-network relaying. Accordingly, in order to become discoverable to the remote UE, the relay UE may periodically broadcast a signal (e.g., a sidelink synchronization signal block (S-SSB) ) that the remote UE can use to synchronize with the relay UE and obtain system information to access the wireless network (e.g., a frame and/or slot structure, channel parameters, access permissions, and/or the like) .
  • a signal e.g., a sidelink synchronization signal block (S-SSB)
  • S-SSB sidelink synchronization signal block
  • the relay UE When the relay UE is operating in a sub-6 GHz frequency spectrum or is otherwise not using beamforming, the relay UE may generally broadcast the system information over an aggregate coverage area with a fixed periodicity.
  • beamforming techniques may be used when the relay UE is operating in the millimeter wave frequency band in order to improve performance, as millimeter wave communications tend to have shorter propagation distances and are more easily blocked by obstructions than other types of radio waves. Accordingly, when the relay UE is operating in the millimeter wave frequency band, the relay UE may transmit the system information using multiple beams that are swept over the aggregate coverage area, with each beam transmitted individually in a different system information signal occasion.
  • the relay UE would need to transmit more beams in order to span the entire coverage area. This may lead to significant power consumption at the relay UE, which may be battery-powered in many cases, in addition to increasing latency due to the increased number of beam transmissions. Furthermore, using a large number of beams to transmit system information may lead to wasted resources in circumstances where there are no remote UEs seeking to establish a sidelink connection with the relay UE.
  • a relay UE may transmit, on a sidelink, a first set of system information signals (F-SIS) using multiple wide beams that are beam swept over an aggregate coverage area according to a configured periodicity.
  • F-SIS system information signals
  • the wide beams may generally have a beamforming gain that is relatively smaller than narrow beams
  • the F-SIS carried in the wide beams may include limited or partial system information (e.g., information to enable discovery of the relay UE by remote UEs) .
  • the F-SIS may indicate a presence of a second set of system information signals (S-SIS) that are transmitted in narrow beams, where each wide beam used to transmit the F-SIS is associated with a group of narrow beams used to transmit the S-SIS, which includes full system information to enable the remote UE to access a base station associated with a wireless network.
  • S-SIS system information signals
  • the relay UE may transmit the S-SIS using a group of narrow beams that are beam swept over a portion of the aggregate coverage area associated with the relay UE (e.g., a portion of the aggregate coverage area that corresponds to the wide beam associated with the wakeup signal occasion) .
  • the relay UE may use fewer wide beams to transmit the F-SIS over the aggregate coverage area, and may use a small number of narrow beams to transmit the S-SIS that enable network access only when a remote UE provides a wakeup signal to indicate a need to transmit the S-SIS.
  • the relay UE may consume less power because fewer wide beams are transmitted over the aggregate coverage area, and latency may be reduced because the small number of wide beams can be swept over the aggregate coverage area in a shorter time relative to a large number of narrow beams.
  • the relay UE may enter a power-saving mode during S-SIS occasions in which narrow beams are not transmitted, may extend a communication range for the S-SIS carried in the narrow beams, and/or the like.
  • Figs. 3A-3C are diagrams illustrating one or more examples 300 of energy-efficient system information transmission in millimeter wave sidelink relaying, in accordance with various aspects of the present disclosure.
  • example (s) 300 include a relay UE (e.g., UE 120) in communication with a base station (e.g., base station 110) associated with a wireless network on an uplink and a downlink (e.g., via a Uu interface) , and a remote UE (e.g., UE 120) that may connect to the relay UE on a sidelink (e.g., via a PC5 interface) .
  • a relay UE e.g., UE 120
  • a base station e.g., base station 110
  • a remote UE e.g., UE 120
  • the relay UE may provide a UE-to-network relay function to relay communications between the remote UE and the base station.
  • the relay UE may periodically broadcast one or more signals (e.g., a sidelink SSB (S-SSB) ) to make the relay UE discoverable to the remote UE, and the remote UE may search for the one or more signals to detect the presence of the relay UE providing the UE-to-network relay function in cases where the remote UE may be unable to directly connect to the base station (e.g., due to a large distance between the remote UE and the base station, limited capabilities or resources, and/or the like) .
  • S-SSB sidelink SSB
  • the relay UE may broadcast the one or more signals to provide system information that the remote UE can use to access the wireless network via the base station according to a hierarchical beam configuration in which the system information is transmitted using a group of wide beams and one or more groups of narrow beams.
  • the relay UE may transmit partial system information over an aggregate coverage area using a group of multiple wide beams.
  • the relay UE may have an antenna array that includes multiple antenna elements, and the relay UE may apply different weights at the multiple antenna elements such that signals at particular angles experience constructive interference while signals at other angles experience destructive interference.
  • the weights can be configured to generate a beam that is steered in a particular direction and to configure a width for the beam.
  • a narrow beam may have a longer coverage range than a wide beam, and a wide beam may have a greater angular coverage area than a narrow beam (e.g., four wide beams that cover a 30-degree angle may be sufficient to sweep a 120-degree aggregate coverage area, whereas twelve narrow beams that cover a 10-degree angle may be needed to sweep the same aggregate coverage area) .
  • the term “wide beam” and variants thereof may generally refer to a beam that has a first beam width, a first angular coverage area, and/or the like that is sufficient to sweep an aggregate coverage area using a quantity of beams that is less than or equal to a threshold value.
  • the term “narrow beam” and variants thereof may generally refer to a beam that has a second beam width, a second angular coverage area, and/or the like that is smaller than the first beam width, the first angular coverage area, and/or the like for a wide beam.
  • each wide beam may have a first beam width, a first angular coverage area, and/or the like that corresponds to a portion of the aggregate coverage area of the relay UE, and each wide beam may be associated with multiple narrow beams that have an aggregate coverage area that correspond to the portion of the aggregate coverage area associated with a single wide beam.
  • the relay UE may transmit N wide beams to sweep the aggregate coverage area of the relay UE, and each wide beam may be associated with M narrow beams, where N and M are greater than one, and where N and M may have the same or different values.
  • the relay UE may be configured to transmit four (4) wide beams to sweep the aggregate coverage area of the relay UE, and each wide beam may be associated with four (4) narrow beams to sweep a portion of the aggregate coverage area that corresponds to the respective wide beam.
  • the relay UE may transmit six (6) wide beams that each cover a 60-degree angle to sweep a 360-degree aggregate coverage area, and each wide beam may be associated with four (4) narrow beams that each cover a 15-degree angle and collectively cover the 60-degree angle of one wide beam.
  • each wide beam transmitted by the relay UE may include a first set of system information signals (F-SIS) that carry the partial system information.
  • the relay UE may transmit each wide beam individually in a respective F-SIS occasion according to a configured periodicity.
  • a system information transmission period may include a set of F-SIS occasions, and one wide beam may be used to transmit one F-SIS in each F-SIS occasion to sweep the wide beams over the aggregate coverage area associated with the relay UE.
  • the system information transmission period may include four (4) F-SIS occasions in which the relay UE sweeps four (4) wide beams over the aggregate coverage area associated with the relay UE, where each wide beam includes the F-SIS that carry the partial system information.
  • each wide beam used to transmit the F-SIS may be associated with a respective group of narrow beams that the relay UE uses to transmit a second set of system information signals (S-SIS) that include full system information that the remote UE can use to access the wireless network associated with the base station.
  • S-SIS system information signals
  • the partial system information carried in the F-SIS may include limited information to indicate only the existence of the narrow beams used to transmit the S-SIS.
  • the F-SIS carried in a particular wide beam may indicate only the existence of the group of narrow beams that are associated with the particular wide beam.
  • the F-SIS carried in each wide beam may indicate the existence of all narrow beams that the relay UE uses to transmit the S-SIS.
  • the F-SIS carried in the wide beams may include limited system information, such as synchronization information, a wakeup signal configuration, power control information, and/or the like.
  • the system information carried in the wide beams generally does not include all the system information that the remote UE may need to access the wireless network.
  • the S-SIS transmitted via the narrow beams may include the full system information that the remote UE can use to access the wireless network, and the relay UE may transmit the narrow beams according to a real-time demand.
  • the remote UE may transmit a wakeup signal associated with a best wide beam to signal, to the relay UE, a real-time demand for the full system information.
  • the relay UE may enter a power-saving mode, a sleep mode, or another suitable low-power mode after transmitting the F-SIS over the aggregate coverage area using the wide beams.
  • the relay UE may enter the power-saving mode, the sleep mode, or another suitable low-power mode after transmitting one or more groups of narrow beams in one or more groups of S-SIS occasions.
  • the relay UE when the relay UE is not connected to a remote UE, the relay UE does not transmit any narrow beams in the S-SIS occasions, in which case the relay UE may enter the power-saving mode, the sleep mode, and/or the like immediately after sweeping the wide beams over the aggregate coverage area.
  • the relay UE when the relay UE is connected to one or more remote UEs, the relay UE may transmit one or more groups of narrow beams in the S-SIS occasions, in which case the relay UE may enter the power-saving mode, the sleep mode, and/or the like after transmitting the narrow beams.
  • the relay UE when the relay UE is in the low-power mode, the relay UE does not receive a physical sidelink control channel (PSCCH) or a physical sidelink shared channel (PSSCH) to save power, and the relay UE may periodically wake up to detect a wakeup signal in certain time-frequency resource units referred to herein as wakeup signal occasions.
  • the wakeup signal may generally include a sequence of symbols or another suitable signal that is less complex to decode relative to a PSCCH or PSSCH, whereby the relay UE may consume less power detecting and decoding the wakeup signal relative to detecting and decoding a PSCCH or PSSCH.
  • the remote UE may select a best wide beam among the detected wide beam (s) (e.g., a wide beam having the best channel quality) , and the remote UE may transmit the wakeup signal to the relay UE to indicate the wide beam selected by the remote UE.
  • the wakeup signal may be transmitted using a radio resource, or wakeup signal occasion, that is associated with the wide beam, which may enable the relay UE to identify the selected wide beam based at least in part on the wakeup signal occasion in which the wakeup signal is received.
  • the wakeup signal may be a simple signal (e.g., a symbol sequence) to indicate only an access requirement of the remote UE (e.g., the wakeup signal does not have to indicate an identifier or other information specific to the remote UE) .
  • the relay UE may transmit full system information to enable the remote UE to access the wireless network associated with the base station using a group of narrow beams based at least in part on the wakeup signal.
  • the wakeup signal occasion in which the wakeup signal is received may generally be associated with a particular wide beam, which is associated with a group of narrow beams that have an aggregate coverage area that substantially overlaps or otherwise corresponds to the coverage area of the associated wide beam.
  • the relay UE may determine the wide beam selected by the remote UE based at least in part on the wakeup signal occasion in which the wakeup signal is received, and the relay UE may further determine the group of narrow beams that are associated with the wide beam selected by the remote UE. Accordingly, in some aspects, the relay UE may transmit the S-SIS that includes the full system information using the narrow beams that are associated with the wide beam selected by the remote UE in corresponding S-SIS occasions. In this way, the relay UE may increase a beamforming gain and a coverage range for the full system information transmitted via the narrow beams in the S-SIS occasions. Furthermore, configuring the group of narrow beams to have an aggregate coverage area that substantially overlaps or otherwise corresponds to the coverage area of the wide beam selected by the remote UE may ensure that the remote UE will receive the narrow beams carrying the S-SIS.
  • the remote UE may acquire access to the wireless network associated with the base station based at least in part on the full system information contained in the S-SIS transmitted using the narrow beams. For example, subsequent to transmitting the wakeup signal indicating the best wide beam used to transmit he F-SIS, the remote UE may continue to receive the wide beams in subsequent system information transmission periods, and the remote UE may check whether the selected wide beam includes an F-SIS that indicates the existence of the associated S-SIS. In some aspects, when the remote UE detects that the wide beam selected by the remote UE indicates the existence of the associated S-SIS, the remote UE may identify a position of the S-SIS occasions used to transmit the narrow beams.
  • the remote UE may receive the S-SIS transmitted using the narrow beams in the corresponding S-SIS occasions and derive the full system information from a best narrow beam. In some aspects, the remote UE may then use the full system information to initiate one or more operations to access the wireless network through the relay UE. For example, in some aspects, the remote UE may transmit a random access preamble, a connection request signal, a connection resume signal, and/or the like to the relay UE. As further shown in Fig. 3B, and by reference number 350, the relay UE may then relay communications between the base station and the remote UE to facilitate access to the wireless network for the remote UE.
  • the wide beams that the relay UE uses to transmit the F-SIS, the narrow beams that the relay UE uses to transmit the S-SIS, and the wakeup signal that the remote UE transmits to signal the real-time demand for the full system information may be transmitted on one or more sidelink channels using corresponding occasions, each of which generally corresponds to a radio resource unit that includes time and frequency resources.
  • a system information transmission period may include a group of F-SIS occasions, each of which is associated with a single wide beam and with one group of narrow beams that are used to transmit the S-SIS.
  • the system information transmission period includes four F-SIS occasions in which the relay UE sweeps four wide beams over an aggregate coverage area, four groups of S-SIS occasions in which the relay UE may sweep four narrow beams over a portion of the aggregate coverage when a wakeup signal selecting one of the wide beams is received, and four wakeup signal (WUS) occasions that correspond to the respective wide beams transmitted in the F-SIS occasions.
  • WUS wakeup signal
  • associations among the F-SIS occasions, the S-SIS occasions, and the WUS occasions may be indicated in the F-SIS, configured by the base station, defined in a wireless telecommunications standard, and/or the like.
  • each wide beam is associated with a group of narrow beams that are used to transmit the S-SIS.
  • the relay UE may transmit a first wide beam associated with a first group of narrow beams (S-SIS 1 ) in a first F-SIS occasion, a second wide beam associated with a second group of narrow beams (S-SIS 2 ) in a second F-SIS occasion, a third wide beam associated with a third group of narrow beams (S-SIS 3 ) in a third F-SIS occasion, and a fourth wide beam associated with a fourth group of narrow beams (S-SIS 4 ) in a fourth F-SIS occasion.
  • the relay UE does not transmit the narrow beams that include the S-SIS in circumstances where there is no served remote UE.
  • the relay UE may wake from a low-power mode to monitor the WUS occasions and determine whether a wakeup signal is received for one or more of the wide beams that were transmitted in the F-SIS occasions.
  • the system information transmission period may include a group of WUS occasions, each of which is associated with one of the F-SIS occasions. Accordingly, to indicate a selection of a particular wide beam (and thereby request transmission of full system information in a narrow beam) , a remote UE may transmit a wakeup signal during the corresponding WUS occasion. For example, in Fig.
  • a remote UE may transmit a wakeup signal in a second WUS occasion to indicate a selection of a wide beam that was transmitted in a second F-SIS occasion.
  • the relay UE may transmit the wide beams that carry the F-SIS in the F-SIS occasions at a configured periodicity in each system information transmission period.
  • the wide beam transmitted in the second F-SIS occasion may indicate the position of the S-SIS occasions in which the group of narrow beams are to be transmitted.
  • the relay UE may transmit the second group of narrow beams that have an aggregate coverage area corresponding to a coverage area of the second wide beam.
  • the relay UE may transmit the S-SIS via only the group of narrow beams that are associated with a selected wide beam based at least in part on the WUS occasion (s) in which a wakeup signal is received, and the relay UE may refrain from transmitting narrow beams that are associated with any wide beams associated with a WUS occasion in which a wakeup signal is not received.
  • Figs. 3A-3C are provided as one or more examples. Other examples may differ from what is described with respect to Figs. 3A-3C.
  • Fig. 4 is a diagram illustrating an example process 400 performed, for example, by a UE, in accordance with various aspects of the present disclosure.
  • Example process 400 is an example where a relay UE (e.g., UE 120 and/or the like) performs operations associated with energy-efficient system information transmission in millimeter wave sidelink relaying.
  • a relay UE e.g., UE 120 and/or the like
  • process 400 may include transmitting, on a sidelink, an F-SIS using multiple wide beams that are beam swept over an aggregate coverage area associated with the relay UE (block 410) .
  • the relay UE may transmit (e.g., using controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, and/or the like) , on a sidelink, an F-SIS using multiple wide beams that are beam swept over an aggregate coverage area associated with the relay UE, as described above.
  • process 400 may include receiving, on the sidelink, a wakeup signal in a wakeup signal occasion associated with one of the multiple wide beams used to transmit the F-SIS (block 420) .
  • the relay UE may receive (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller/processor 280, memory 282, and/or the like) , on the sidelink, a wakeup signal in a wakeup signal occasion associated with one of the multiple wide beams used to transmit the F-SIS, as described above.
  • process 400 may include transmitting, on the sidelink, an S-SIS associated with the wakeup signal occasion in which the wakeup signal is received, wherein the S-SIS is transmitted using multiple narrow beams that are beam swept over a portion of the aggregate coverage area associated with the relay UE (block 430) .
  • the relay UE may transmit (e.g., using controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, and/or the like) , on the sidelink, an S-SIS associated with the wakeup signal occasion in which the wakeup signal is received, as described above.
  • the S-SIS is transmitted using multiple narrow beams that are beam swept over a portion of the aggregate coverage area associated with the relay UE.
  • Process 400 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.
  • the portion of the aggregate coverage area in which the multiple narrow beams are beam swept corresponds to a coverage area associated with the one of the multiple wide beams associated with the wakeup signal occasion in which the wakeup signal is received.
  • the multiple wide beams are transmitted in a set of F-SIS occasions according to a configured periodicity.
  • the wakeup signal occasion in which the wakeup signal is received is associated with one of the set of F-SIS occasions.
  • the multiple narrow beams are transmitted in a set of S-SIS occasions associated with one of the set of F-SIS occasions.
  • the F-SIS include information to indicate an existence of the S-SIS, and the S-SIS include information to enable a remote UE to access a base station associated with a wireless network through the relay UE.
  • each system information signal included in the F-SIS indicates the existence of only a group of the S-SIS that are associated with the respective system information signal.
  • each system information signal included in the F-SIS indicates the existence of all of the S-SIS configured for the relay UE.
  • the F-SIS further include a partial set of communication parameters configured for the base station.
  • process 400 includes refraining from transmitting the S-SIS in one or more groups of narrow beams associated with wakeup signal occasions in which a wakeup signal is not received.
  • process 400 includes receiving, on the sidelink, a request to access a wireless network from a remote UE based at least in part on information carried in the S-SIS, and process 400 further includes and relaying communications between the remote UE and a base station associated with the wireless network to facilitate access to the wireless network for the remote UE.
  • the request to access the wireless network includes one or more of a random access preamble transmission or a connection request signal transmission.
  • process 400 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 4. Additionally, or alternatively, two or more of the blocks of process 400 may be performed in parallel.
  • Fig. 5 is a diagram illustrating an example process 500 performed, for example, by a UE, in accordance with various aspects of the present disclosure.
  • Example process 500 is an example where a remote UE (e.g., UE 120 and/or the like) performs operations associated with energy-efficient system information transmission in millimeter wave sidelink relaying.
  • a remote UE e.g., UE 120 and/or the like
  • process 500 may include receiving an F-SIS on a sidelink, wherein the F-SIS is transmitted by a relay UE using multiple wide beams that are beam swept over an aggregate coverage area associated with the relay UE (block 510) .
  • the remote UE may receive (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller/processor 280, memory 282, and/or the like) an F-SIS on a sidelink, as described above.
  • the F-SIS is transmitted by a relay UE using multiple wide beams that are beam swept over an aggregate coverage area associated with the relay UE.
  • process 500 may include transmitting, on the sidelink, a wakeup signal to the relay UE in a wakeup signal occasion associated with one of the multiple wide beams used to transmit the F-SIS (block 520) .
  • the remote UE may transmit (e.g., using controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, and/or the like) , on the sidelink, a wakeup signal to the relay UE in a wakeup signal occasion associated with one of the multiple wide beams used to transmit the F-SIS, as described above.
  • process 500 may include receiving, on the sidelink, an S-SIS associated with the wakeup signal occasion in which the wakeup signal is transmitted, wherein the S-SIS is transmitted by the relay UE using multiple narrow beams that are beam swept over a portion of the aggregate coverage area associated with the relay UE (block 530) .
  • the remote UE may receive (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller/processor 280, memory 282, and/or the like) , on the sidelink, an S-SIS associated with the wakeup signal occasion in which the wakeup signal is transmitted, as described above.
  • the S-SIS is transmitted by the relay UE using multiple narrow beams that are beam swept over a portion of the aggregate coverage area associated with the relay UE.
  • Process 500 may include additional aspects, such as any single aspect or any combination of aspects described below and/or in connection with one or more other processes described elsewhere herein.
  • the portion of the aggregate coverage area in which the multiple narrow beams are beam swept corresponds to a coverage area associated with the one of the multiple wide beams associated with the wakeup signal occasion in which the wakeup signal is transmitted.
  • the multiple wide beams are transmitted in a set of F-SIS occasions according to a configured periodicity.
  • the wakeup signal occasion in which the wakeup signal is transmitted is associated with one of the set of F-SIS occasions.
  • the multiple narrow beams are transmitted in a set of S-SIS occasions associated with one of the set of F-SIS occasions.
  • the F-SIS include information to indicate an existence of the S-SIS, and the S-SIS include information to enable the remote UE to access a base station associated with a wireless network through the relay UE.
  • each system information signal included in the F-SIS indicates the existence of only a group of the S-SIS that are associated with the respective system information signal.
  • each system information signal included in the F-SIS indicates the existence of all of the S-SIS configured for the relay UE.
  • the F-SIS further include a partial set of communication parameters configured for the base station.
  • process 500 includes transmitting, on the sidelink, a request to access a wireless network to the relay UE based at least in part on information carried in the S-SIS, wherein the relay UE is relaying communications between the remote UE and a base station associated with the wireless network to facilitate access to the wireless network for the remote UE.
  • the request to access the wireless network includes one or more of a random access preamble transmission or a connection request signal transmission.
  • process 500 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 5. Additionally, or alternatively, two or more of the blocks of process 500 may be performed in parallel.
  • ком ⁇ онент is intended to be broadly construed as hardware, firmware, and/or a combination of hardware and software.
  • a processor is implemented in hardware, firmware, and/or a combination of hardware and software.
  • satisfying a threshold may, depending on the context, refer to a value being greater than the threshold, greater than or equal to the threshold, less than the threshold, less than or equal to the threshold, equal to the threshold, not equal to the threshold, and/or the like.
  • “at least one of: a, b, or c” is intended to cover a, b, c, a-b, a-c, b-c, and a-b-c, as well as any combination with multiples of the same element (e.g., a-a, a-a-a, a-a-b, a-a-c, a-b-b, a-c-c, b-b, b-b-b, b-b-c, c-c, and c-c-c or any other ordering of a, b, and c) .
  • the terms “has, ” “have, ” “having, ” and/or the like are intended to be open-ended terms. Further, the phrase “based on” is intended to mean “based, at least in part, on” unless explicitly stated otherwise.

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Abstract

Divers aspects de la présente divulgation se rapportent de manière générale à la communication sans fil. Selon certains aspects, un équipement utilisateur (UE) relais peut transmettre, sur une liaison latérale, un premier ensemble de signaux d'informations de système (F-SIS) au moyen de multiples faisceaux larges qui sont balayés par faisceau sur une zone de couverture globale associée à l'UE relais. L'UE relais peut recevoir, sur la liaison latérale, un signal de réveil dans une occasion de signal de réveil associée à l'un des multiples faisceaux larges utilisés pour transmettre le F-SIS. L'UE relais peut transmettre, sur la liaison latérale, un second ensemble de signaux d'informations de système associé à l'occasion de signal de réveil dans lequel le signal de réveil est reçu au moyen de multiples faisceaux étroits qui sont balayés par faisceau sur une partie de la zone de couverture globale associée à l'UE relais. De nombreux autres aspects sont concernés.
PCT/CN2020/070876 2020-01-08 2020-01-08 Transmission d'informations de système économe en énergie dans un relais de liaison latérale à ondes millimétriques WO2021138835A1 (fr)

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