WO2021147061A1 - Commutation de porteuses pour de multiples signaux de référence de sondage par porteuse - Google Patents

Commutation de porteuses pour de multiples signaux de référence de sondage par porteuse Download PDF

Info

Publication number
WO2021147061A1
WO2021147061A1 PCT/CN2020/073948 CN2020073948W WO2021147061A1 WO 2021147061 A1 WO2021147061 A1 WO 2021147061A1 CN 2020073948 W CN2020073948 W CN 2020073948W WO 2021147061 A1 WO2021147061 A1 WO 2021147061A1
Authority
WO
WIPO (PCT)
Prior art keywords
carrier
srs
switching
transmit
time
Prior art date
Application number
PCT/CN2020/073948
Other languages
English (en)
Inventor
Alexandros MANOLAKOS
Alberto Rico Alvarino
Awlok Singh JOSAN
Yu Zhang
Original Assignee
Qualcomm Incorporated
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 Qualcomm Incorporated filed Critical Qualcomm Incorporated
Priority to PCT/CN2020/073948 priority Critical patent/WO2021147061A1/fr
Publication of WO2021147061A1 publication Critical patent/WO2021147061A1/fr

Links

Images

Classifications

    • 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
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
    • 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
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • 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
    • H04L5/0091—Signaling for the administration of the divided path
    • H04L5/0094—Indication of how sub-channels of the path are allocated

Definitions

  • aspects of the present disclosure generally relate to wireless communication and to techniques and apparatuses for switching carriers for multiple sounding reference signals per carrier.
  • 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 UniversalMobile Telecommunications System (UMTS) mobile standard promulgated by the Third Generation Partnership Project (3GPP) .
  • UMTS UniversalMobile 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 receiving an instruction to transmit a first sounding reference signal (SRS) on a second carrier and a second SRS on the second carrier, switching from the first carrier to the second carrier, and transmitting the first SRS on the second carrier.
  • the method may include selectively switching back to the first carrier based at least in part on a time gap between transmitting the first SRS on the second carrier and transmitting the second SRS on the second carrier, and transmitting the second SRS on the second carrier.
  • a method of wireless communication performed by a base station configured to communicate with a UE that is transmitting communications on a first carrier, may include determining that a first SRS and a second SRS are to be transmitted on a second carrier, and determining a time gap between transmission of the first SRS by the UE and transmission of the second SRS by the UE, based at least in part on a carrier switching capability of the UE.
  • the method may include transmitting an instruction to the UE to transmit the first SRS on the second carrier and the second SRS on the second carrier.
  • a timing of transmission of the first SRS by the UE and the second SRS by the UE may be based at least in part on the time gap.
  • a UE for wireless communication may include 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 instruction to transmit a first SRS on a second carrier and a second SRS on the second carrier, switch from the first carrier to the second carrier, and transmit the first SRS on the second carrier.
  • the memory and the one or more processors may be configured to selectively switch back to the first carrier based at least in part on a time gap between transmitting the first SRS on the second carrier and transmitting the second SRS on the second carrier, and transmit the second SRS on the second carrier.
  • a base station for wireless communication may include memory and one or more processors operatively coupled to the memory.
  • the memory and the one or more processors may be configured to determine that a first SRS and a second SRS are to be transmitted on a second carrier.
  • the memory and the one or more processors may be configured to determine a time gap between transmission of the first SRS by the UE and transmission of the second SRS by the UE, based at least in part on a carrier switching capability of the UE, and transmit an instruction to the UE to transmit the first SRS on the second carrier and the second SRS on the second carrier.
  • a timing of transmission of the first SRS by the UE and the second SRS by the UE may be based at least in part on the time gap.
  • 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 UE, may cause the one or more processors to receive an instruction to transmit a first SRS on a second carrier and a second SRS on the second carrier, switch from the first carrier to the second carrier, and transmit the first SRS on the second carrier.
  • the one or more instructions when executed by the one or more processors of the UE, may cause the one or more processors to selectively switch back to the first carrier based at least in part on a time gap between transmitting the first SRS on the second carrier and transmitting the second SRS on the second carrier, and transmit the second SRS on the second carrier.
  • 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 base station configured to communicate with a UE that is configured to transmit communications on a first carrier, may cause the one or more processors to determine that a first SRS and a second SRS are to be transmitted on a second carrier, determine a time gap between transmission of the first SRS by the UE and transmission of the second SRS by the UE, based at least in part on a carrier switching capability of the UE, and transmit an instruction to the UE to transmit the first SRS on the second carrier and the second SRS on the second carrier.
  • a timing of transmission of the first SRS by the UE and the second SRS by the UE may be based at least in part on the time gap.
  • an apparatus for wireless communication that is configured to transmit on a first carrier may include means for receiving an instruction to transmit a first SRS on a second carrier and a second SRS on the second carrier, means for switching from the first carrier to the second carrier, means for transmitting the first SRS on the second carrier, means for selectively switching back to the first carrier based at least in part on a time gap between transmitting the first SRS on the second carrier and transmitting the second SRS on the second carrier, and means for transmitting the second SRS on the second carrier.
  • an apparatus configured to communicate with a UE that is configured to transmit on a first carrier may include means for determining that a first SRS and a second SRS are to be transmitted on a second carrier, by a UE configured to transmit on a first carrier, means for determining a time gap between transmission of the first SRS by the UE and transmission of the second SRS by the UE, based at least in part on a carrier switching capability of the UE, and means for transmitting an instruction to the UE to transmit the first SRS on the second carrier and the second SRS on the second carrier, where a timing of transmission of the first SRS by the UE and the second SRS by the UE is based at least in part on the time gap.
  • 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 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.
  • Fig. 3 illustrates an example of sounding reference signal (SRS) resources that are transmitted in symbols of a slot, in accordance with various aspects of the present disclosure.
  • SRS sounding reference signal
  • Fig. 4 illustrates examples of switching times between carriers, in accordance with various aspects of the present disclosure.
  • Fig. 5 illustrates an example of antenna switching, in accordance with various aspects of the present disclosure.
  • Figs. 6-8 illustrate an example of switching carriers for multiple SRSs per carrier for multiple carriers, in accordance with various aspects of the present disclosure.
  • Fig. 9 illustrates an example of a time gap between SRSs and switching times, in accordance with various aspects of the present disclosure.
  • Fig. 10 illustrates examples of switching times, in accordance with various aspects of the present disclosure.
  • Fig. 11 illustrates an example of carrier switching for transmission of multiple SRSs, in accordance with various aspects of the present disclosure.
  • Fig. 12 illustrates an example of carrier switching for transmission of multiple SRSs, in accordance with various aspects of the present disclosure.
  • Fig. 13 illustrates an example of carrier switching for transmission of multiple SRSs, in accordance with various aspects of the present disclosure.
  • Fig. 14 illustrates an example of carrier switching for transmission of multiple SRSs, in accordance with various aspects of the present disclosure.
  • Fig. 15 is a diagram illustrating an example process performed, for example, by a UE configured to transmit communications on a first carrier, in accordance with various aspects of the present disclosure.
  • Fig. 16 is a diagram illustrating an example process performed, for example, by a base station configured to communicate with a UE configured to transmit communications on a first carrier, 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 ofBSs 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 (loT) devices, and/or may be implemented as NB-loT (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 e.g., shown as UE 120a and UE
  • the 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.
  • 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 switching carriers with multiple SRSs per carrier for multiple carriers, 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 1500 of Fig. 15, process 1600 of Fig. 16, 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 282 of the UE can comprise a non-transitory computer-readable medium storing one or more instructions for wireless communication, where the one or more instructions comprise one or more instructions that, when executed by one or more processors (e.g., processor 258 and/or controller/processor 280) of the UE 120, cause the one or more processors to perform the method described in greater detail with reference to Figs. 3-16.
  • 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 1500 of Fig. 15, process 1600 of Fig. 16, 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 communicate on a first carrier and include means for receiving an instruction to transmit a first SRS on a second carrier and a second SRS on the second carrier (e.g., using antenna 252, DEMOD 254, MIMO detector 256, receive processor 258, controller/processor 280, memory 282, and/or the like) , means for switching from the first carrier to the second carrier (e.g., using receive processor 258, transmit processor 264, controller/processor 280, memory 282, and/or the like) , means for transmitting the first SRS on the second carrier (e.g., using controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254, antenna 252, and/or the like) , means for selectively switching back to the first carrier based at least in part on a time gap between transmitting the first SRS on the second carrier and transmitting the second SRS on the second carrier (e.g., using controller/processor 280, transmit processor 264, TX MIMO processor 266, MOD 254,
  • 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.
  • base station 110 may communicate with a UE configured to communicate on a first carrier and include means for determining that a first SRS and a second SRS are to be transmitted on a second carrier (e.g., using transmit processor 220, receive processor 238, controller/processor 240, memory 242, and/or the like) , means for determining a time gap between transmission of the first SRS by the UE and transmission of the second SRS by the UE, based at least in part on a carrier switching capability of the UE (e.g., using transmit processor 220, receive processor 238, controller/processor 240, memory 242, and/or the like) , means for transmitting an instruction to the UE to transmit the first SRS on the second carrier and the second SRS on the second carrier, where a timing of transmission of the first SRS by the UE and the second SRS by the UE is based at least in part on the time gap (e.g., using controller/processor 240, transmit processor 220, TX MIMO processor 230
  • such means may include one or more components of base station 110 described in connection with Fig. 2, such as antenna 234, DEMOD 232, MIMO detector 236, receive processor 238, controller/processor 240, transmit processor 220, TX MIMO processor 230, MOD 232, antenna 234, and/or the like.
  • Fig. 2 is provided as an example. Other examples may differ from what is described with regard to Fig. 2.
  • Fig. 3 illustrates an example of SRS resources that are transmitted in symbols of a slot.
  • SRSs are uplink (UL) reference signals that a UE may transmit so that a base station may estimate an UL channel.
  • NR supports NR SRS resources that span 1, 2, or 4 adjacent symbols, with up to 4 ports per SRS resource. All ports of an SRS resource may be sounded in each symbol.
  • Each SRS resource may be part of an SRS resource set, which may be transmitted periodically, semi-persistently or aperiodically.
  • an SRS resource can be limited to the last 6 symbols of the slot, after the physical uplink shared channel (PUSCH) .
  • a UE may be configured with multiple SRS resources, which may be grouped into SRS resource sets.
  • An SRS resource set may be used for antenna switching, codebook-based transmission, non-codebook based transmission, beam management, and/or the like.
  • the SRS resource set may be transmitted aperiodically (signaled by downlink control information (DCI) ) , semi-persistently, or periodically.
  • DCI downlink control information
  • SRS transmissions may be for widebands or for subbands, and an SRS bandwidth may be a multiple of 4 physical resource blocks.
  • the UE may transmit on an UL channel, such as on a PUSCH or a physical uplink control channel (PUCCH) .
  • UL channel such as on a PUSCH or a physical uplink control channel (PUCCH) .
  • PUCCH physical uplink control channel
  • a base station may learn the UL channel, and due to reciprocity, the base station may also learn the downlink (DL) channel.
  • DL downlink
  • a component carrier may not be configured for transmission on the PUSCH or the PUCCH, and a UE may have to switch from an existing carrier to another carrier to transmit an SRS. Therefore, if the UE receives DCI instructing the UE to transmit multiple SRSs, the UE switches to the other carrier to transmit a first one of the SRSs. The UE will typically switch back to the original transmission carrier. When it is time to transmit a next one of the SRSs, the UE will again switch to the other carrier and transmit the next one of the SRSs.
  • the DCI will indicate a type of carrier order for carrier switching.
  • a parameter of Type A indicates that SRS transmission will follow the carriers in order.
  • a parameter of Type B indicates that SRS transmission will follow a different carrier order.
  • Fig. 3 is provided as an example. Other examples may differ from what is described with regard to Fig. 3.
  • SRS transmissions may collide with other transmissions and rules for handling such conflicts may be specified.
  • Some basic rules specify that an SRS may have priority over a PUCCH/PUSCH transmission carrying periodic channel state information (CSI) but not have priority over a PUSCH transmission carrying aperiodic CSI.
  • CSI channel state information
  • the UE will not transmit a periodic/semi-persistent SRS whenever SRS transmission (including any interruption due to UL or DL radio frequency retuning time as defined by higher layer parameters switchingTimeUL and switchingTimeDL of SRS-SwitchingTimeNR) on the carrier of the serving cell and PUSCH transmission carrying aperiodic CSI happen to overlap in the same symbol.
  • SRS transmission including any interruption due to UL or DL radio frequency retuning time as defined by higher layer parameters switchingTimeUL and switchingTimeDL of SRS-SwitchingTimeNR
  • the UE For a carrier not configured for PUSCH/PUCCH transmission, the UE will drop a PUCCH/PUSCH transmission carrying periodic CSI that includes only a channel quality indicator (CQI) or pre-coding matrix indicator (PMI) , and/or SRS transmission on another serving cell configured for PUSCH/PUCCH transmission whenever the transmission and SRS transmission on the serving cell happen to overlap in the same symbol.
  • CQI channel quality indicator
  • PMI pre-coding matrix indicator
  • the UE For a carrier not configured for PUSCH/PUCCH transmission, the UE will drop PUSCH transmission carrying aperiodic CSI that includes only CQI or PMI whenever the transmission and aperiodic SRS transmission on the carrier of the serving cell happen to overlap in the same symbol.
  • Fig. 4 illustrates examples of switching times between carriers.
  • SRS-SwitchingTimeNR indicates an interruption time of DL reception or UL transmission within an NR band pair for radio frequency retuning. It may be useful for the UE to retune frequencies when switching to another carrier from a PUSCH-less carrier in order to transmit SRS.
  • example 400 shows a switching time (switchingTimeDL) for switching from a first carrier (serving cell) used for transmitting DL communications to a second carrier used for SRS transmissions. There is another switchingTimeDL that represents the interruption switching from the second carrier used for SRS transmissions back to the first carrier used for DL transmissions.
  • Example 402 shows switchingTimeUL involving the first carrier used for UL transmission.
  • Example 404 shows switching from DL reception on the first carrier to the second carrier for an SRS transmission and then switching back to the first carrier for UL transmission.
  • Example 406 shows switching from UL transmission on the first carrier to the second carrier for an SRS transmission and then switching back to the first carrier for DL reception.
  • Examples of switchingTimeDL may include 0 ⁇ s, 30 ⁇ s, 100 ⁇ s, 140 ⁇ s, 200 ⁇ s, 300 ⁇ s 500 ⁇ s, or 900 ⁇ s.
  • Examples of switchingTimeUL may include 0 ⁇ s, 30 ⁇ s, 100 ⁇ s, 140 ⁇ s, 200 ⁇ s, 300 ⁇ s, 500 ⁇ s, or 900 ⁇ s.
  • a UE may be configured for SRS transmission.
  • Element SRS-TxSwitch may define whether the UE supports SRS for DL CSI acquisition. Capability signaling may include certain parameters.
  • Element supportedSRS-TxPortSwitch may indicate an SRS port switching pattern supported by the UE.
  • the indicated UE antenna switching capability of “xTyR” may correspond to a UE, capable of SRS transmission on “x” antenna ports over a total of “y” antennas, where “y” corresponds to all or a subset of UE receive antennas (2T4R is two pairs of antennas) .
  • Element txSwitchImpactToRx may indicate an entry number of a first-listed band with uplink in a band combination that affects the DL.
  • Element txSwitchWithAnotherBand indicates the entry number of the first-listed band with UL in the band combination that switches together with this UL.
  • value 1 means first entry
  • value 2 means second entry
  • All DL and UL that switch together indicate the same entry number.
  • the UE is restricted to not include fallback band combinations for the purpose of indicating different SRS antenna switching capabilities.
  • Fig. 4 is provided as an example. Other examples may differ from what is described with regard to Fig. 4.
  • Fig. 5 illustrates an example 500 of antenna switching.
  • a first set of antennas (0, 1, 2) may operate in a first slot
  • a second set of antennas (3, 4, 5) may operate in a second slot.
  • SRS resource set 0 may correspond to the first set of antennas
  • SRS resource set 1 may correspond to the second set of antennas.
  • the first slot and the second slot may have different offsets from an SRS trigger.
  • a base station may instruct the UE to transmit SRSs at particular slots.
  • Fig. 5 is provided as an example. Other examples may differ from what is described with regard to Fig. 5.
  • a base station may instruct a UE to send multiple SRSs per carrier, which may not be consecutive in time, for multiple carriers. Multiple carriers may be involved if the UE is transmitting on a carrier that does not provide for UL SRS transmissions.
  • the UE may switch from a first component carrier i (CCi) to a second carrier CC2 using a defined SRS carrier switching mechanism, and transmit 2 SRS resources in different slots in CC2. For example, in a case of i T4R, 2 antennas are sounded in one slot and 2 other antennas are sounded in a different configured slot for CC2.
  • the UE may transmit in CCi, switch to CC2 to transmit a first SRS, and then switch back to the CCi.
  • the UE will again switch to CC2 to transmit a second SRS.
  • the UE may be ineffective, depending on the switching time. For example, if there is a large time gap between the first SRS and the second SRS, switching back to CC i from CC2 may not be an issue. However, if the time gap is smaller, the carrier switching may waste time, power, and signaling resources if the switching times take up a large portion of the time gap.
  • a UE transmitting on a first carrier may receive an instruction to transmit multiple SRSs. Because transmission of the SRSs on an uplink may not be possible on the first carrier, the UE may transmit the SRSs on a second carrier. The UE may switch to the second carrier to transmit a first SRS. The UE may determine whether to remain on the second carrier or to switch from the second carrier to the first carrier (and back) before transmitting a second SRS on the second carrier.
  • the UE may determine to switch to the first carrier or to remain on the second carrier based at least in part on one or more factors, which may include carrier switching times, a size of the time gap between SRSs, and/or a portion (e.g., fraction, percentage, ratio, and/or the like) of switching time compared to the time gap. These factors may correspond to a capability of the UE.
  • the UE may selectively switch carriers or remain on the second carrier based at least in part on the one or more factors. As a result, the UE may not waste time, processing, and signaling resources switching carriers when carrier switching is not time and cost effective.
  • Figs. 6-8 illustrate an example 600 of switching carriers for multiple SRSs per carrier for multiple carriers, in accordance with various aspects of the present disclosure.
  • Figs. 6-8 show a base station (BS) 610 (e.g., BS 110 depicted in Figs. 1 and 2) that may communicate with a UE 620 (e.g., UE 120 depicted in Figs. 1 and 2) that is transmitting on a first carrier.
  • BS base station
  • UE 620 e.g., UE 120 depicted in Figs. 1 and 2
  • BS 610 may determine that first and second SRSs are to be transmitted by UE 620.
  • BS 610 may determine a timing for the SRSs, on which carriers to transmit the SRSs, and/or the like.
  • UE 620 may not be able to transmit SRSs on the first carrier, and thus UE 620 may be expected to switch carriers to transmit the SRSs.
  • BS 610 may determine a time gap between the first SRS and the second SRS. Rather than an arbitrary time gap, BS 610 may determine a time gap between transmission of the first SRS by the UE and transmission of the second SRS by the UE based at least in part on a capability of UE 620.
  • UE 620 may have transmitted a message to BS 610, indicating a carrier switching capability of UE 620.
  • the carrier switching capability of UE 620 may correspond to a possible configuration of UE 620.
  • BS 610 may learn carrier switching times of UE 620, including a switching time from the first carrier to the second carrier and a switching time from the second carrier to the first carrier.
  • BS 610 may determine a time gap based at least in part on the carrier switching times. The time gap may assist UE 620 in determining whether to switch carriers or to remain on a carrier in between transmitting the first SRS and transmitting the second SRS. As shown by reference number 640, BS 610 may transmit an instruction to UE 620 to transmit a first SRS and a second SRS on a second carrier. The instruction may indicate a timing of the SRSs that corresponds to the time gap. The instruction may also indicate a length of the first SRS and/or a length of the second SRS. BS 610 may determine these lengths based at least in part on the time gap and the carrier switching capability of UE 620.
  • UE 620 may switch from the first carrier to the second carrier. This may include retuning a radio interface or other signaling resources to transmit or receive on a different frequency. As shown by reference number 650, UE 620 may transmit the first SRS on the second carrier.
  • UE 620 may determine, for the time gap between transmitting the first SRS and transmitting the second SRS, whether UE 620 will switch back to the first carrier or remain on the second carrier. UE 620 may make this determination based at least in part on one or more factors.
  • One factor may be a carrier switching time of UE 620.
  • UE 620 may compare the carrier switching time and a switching time threshold. If the carrier switching time satisfies the switching time threshold, UE 620 may determine to switch back to the first carrier. For example, if UE 620 determines that the carrier switching time is 200 ⁇ s and the switching time threshold is 300 ⁇ s, UE 620 may determine to switch back to the first carrier. Otherwise, UE 620 may determine to remain on the second carrier.
  • a factor may be the time gap between SRSs, which may be based at least in part on an indication of a timing of the SRSs that is included in the instruction from BS 610.
  • UE 620 may compare the time gap and a time gap threshold. If the time gap satisfies the time gap threshold, UE 620 may determine to switch back to the first carrier. For example, if the time gap is greater than a time gap threshold in duration, UE 620 may determine to switch back to the first carrier. Otherwise, UE 620 may determine to remain on the second carrier.
  • UE 620 may determine whether to switch back to the first carrier based at least in part on a combination of the time gap and the carrier switching times. UE 620 may determine to switch back to the first carrier based at least in part on how much of a time gap is occupied by the switching times. This combined factor is further described in connection with Fig. 9.
  • UE 620 may selectively switch back to the first carrier based at least in part on the determination. Selectively means that UE 620 may select to switch back to the first carrier or select to remain on the second carrier, based at least in part on whether UE 620 determined to switch or to remain.
  • UE 620 may transmit the second SRS on the second carrier. If UE 620 determined to switch back to the first carrier during the time gap, UE 620 may switch to the second carrier again to transmit the second SRS. If UE 620 determined to remain on the second carrier during the time gap, UE 620 may transmit the second SRS on the second carrier without having to do any switching.
  • FIGS. 6-8 are provided as an example. Other examples may differ from what is described with regard to Figs. 6-8.
  • Fig. 9 illustrates an example 900 of a time gap between SRSs and switching times, in accordance with various aspects of the present disclosure.
  • Fig. 9 shows a timing of a first SRS 902 and a second SRS 904.
  • Fig. 9 shows a switching time 906 for first SRS 902 and a switching time
  • First SRS 902 is separated from second SRS 904 by a time gap 910.
  • UE 620 may determine whether to switch back to the first carrier based at least in part on what portion of time gap 910 is occupied by switching time 906 and switching time 908.
  • the portion may be a fraction, a percentage, a ratio, and/or the like. For example, if switching time 906 and switching time 908, together, occupy 45%of time gap 910, UE 620 may determine to switch back to the first carrier if a portion threshold is 50%. Otherwise, UE 620 may determine to remain on the second carrier.
  • the portion threshold may be different amounts, such as 10%or even 100%. This portion may be related to a UE capability for switching carriers and/or transmitting SRSs.
  • Fig. 9 is provided as an example. Other examples may differ from what is described with regard to Fig. 9.
  • Fig. 10 illustrates examples 1000, 1002, 1004, and 1006 of switching times, in accordance with various aspects of the present disclosure.
  • Fig. 10 shows an example 1000 of a switching time for an SRS transmission as depicted in Fig. 9 and as related to Fig. 4. As shown in Fig. 10, the switching time is broken out into a time to switch from DL reception on the first carrier to the SRS transmission on the second carrier and a time to switch back to DL reception on the first carrier.
  • Fig. 10 shows an example 1002 of a switching time for an SRS transmission, broken out into a time to switch from UL transmission on the first carrier to the SRS transmission on the second carrier and a time to switch back to UL transmission on the first carrier.
  • Fig. 10 shows an example 1000 of a switching time for an SRS transmission as depicted in Fig. 9 and as related to Fig. 4. As shown in Fig. 10, the switching time is broken out into a time to switch from DL reception on the first carrier to the SRS transmission on the
  • FIG. 10 shows an example 1004 of a switching time for an SRS transmission, broken out into a time to switch from DL reception on the first carrier to the SRS transmission on the second carrier and a time to switch back to UL transmission on the first carrier.
  • Fig. 10 shows an example 1006 of a switching time for an SRS transmission, broken out into a time to switch from UL transmission on the first carrier to the SRS transmission on the second carrier and a time to switch back to DL reception on the first carrier.
  • Fig. 10 is provided as an example. Other examples may differ from what is described with regard to Fig. 10.
  • Fig. 11 illustrates an example 1100 of carrier switching for transmission of multiple SRSs, in accordance with various aspects of the present disclosure.
  • BS 610 may determine a timing of transmission of SRS 1 through SRS5 on multiple carriers.
  • BS 610 may instruct UE 620 to transmit SRS1 and SRS2 on CC1, transmit SRS3 and SRS4 on CC2, and transmit SRS5 on CC3.
  • UE 620 may make a determination for selectively switching back to a carrier or remaining on a carrier on a case by case basis. For example, UE 620 may switch back to CC0 between SRS 1 and SRS2, and may switch back to CC0 between SRS3 and SRS4. UE 620 may remain on CC2 after SRS4 and before SRS5.
  • Fig. 11 is provided as an example. Other examples may differ from what is described with regard to Fig. 11.
  • Fig. 12 illustrates an example 1200 of carrier switching for transmission of multiple SRSs, in accordance with various aspects of the present disclosure.
  • BS 610 may determine a timing of transmission of SRS 1 through SRS5 on multiple carriers.
  • Fig. 12 also shows that UE 620 may make a determination for selectively switching back to a carrier or remaining on a carrier on a case by case basis.
  • UE 620 may remain on CC1 between SRS1 and SRS2, and remain on CC2 between SRS3 and SRS4.
  • UE 620 may remain on CC2 after SRS4 and before SRS5.
  • Fig. 12 is provided as an example. Other examples may differ from what is described with regard to Fig. 12.
  • Fig. 13 illustrates an example 1300 of carrier switching for transmission of multiple SRSs, in accordance with various aspects of the present disclosure.
  • BS 610 may determine a timing of transmission of SRS 1 through SRS5 on multiple carriers.
  • Fig. 13 also shows that UE 620 may make a determination for selectively switching back to a carrier or remaining on a carrier on a case by case basis.
  • UE 620 may switch back to CC0 between SRS1 and SRS2, and remain on CC2 between SRS3 and SRS4.
  • UE 620 may remain on CC2 after SRS4 and before SRS5.
  • Fig. 13 is provided as an example. Other examples may differ from what is described with regard to Fig. 13.
  • Fig. 14 illustrates an example 1400 of carrier switching for transmission of multiple SRSs, in accordance with various aspects of the present disclosure.
  • BS 610 may determine a timing of transmission of SRS 1 through SRS6 on multiple carriers.
  • BS 610 may instruct UE 620 to transmit SRS1 and SRS2 on CC1, transmit SRS3 and SRS4 also on CC2, transmit SRS5 on CC2, and transmit SRS6 on CC3.
  • UE 620 may make a determination for selectively switching back to a carrier or remaining on a carrier on a case by case basis, even where there is some variation of switching determinations on the same carrier.
  • UE 620 may switch back to CC0 between SRS 1 and SRS2, and switch back to CC0 between SRS2 and SRS3.
  • UE 620 may remain on CC 1 between SRS3 and SRS4 and after SRS4 and before SRS5.
  • UE 620 may remain on CC2 after SRS5 and before SRS6.
  • Fig. 14 is provided as an example. Other examples may differ from what is described with regard to Fig. 14.
  • UE 620 may selectively switch back to an original carrier based at least in part on one or more factors that correspond to a time gap between SRSs and carrier switching times. While some example operations are described with reference to Figs. 6-14, there may be other operations that consider a combination of a time gap, carrier switching times, a quantity of SRSs on a carrier, a quantity of carriers, an arrangement of carriers, a frequency distance between carriers, and/or the like. UE 620 may be more selective, on a case by case basis, in determining whether to remain on a carrier or to switch to another carrier in between SRS transmissions. This provides for a better use of time, processing, and signaling resources, which improves a quality of feedback, a quality of transmission, and a battery life of UE 620.
  • Fig. 15 is a diagram illustrating an example process 1500 performed, for example, by a UE configured to transmit communications on a first carrier, in accordance with various aspects of the present disclosure.
  • Example process 1500 is an example where the UE (e.g., UE 120 depicted in Figs. 1 and 2, UE 620 depicted in Figs. 6-8, and/or the like) performs operations associated with switching multiple SRS per carrier of multiple carriers.
  • the UE e.g., UE 120 depicted in Figs. 1 and 2, UE 620 depicted in Figs. 6-8, and/or the like
  • process 1500 may include receiving an instruction to transmit a first SRS on a second carrier and a second SRS on the second carrier (block 1510) .
  • the UE e.g., using receive processor 258, transmit processor 264, controller/processor 280, memory 282, and/or the like
  • process 1500 may include switching from the first carrier to the second carrier (block 1520) .
  • the UE e.g., using receive processor 258, transmit processor 264, controller/processor 280, memory 282, and/or the like
  • process 1500 may include transmitting the first SRS on the second carrier (block 1530) .
  • the UE e.g., using receive processor 258, transmit processor 264, controller/processor 280, memory 282, and/or the like
  • process 1500 may include selectively switching back to the first carrier based at least in part on a time gap between transmitting the first SRS on the second carrier and transmitting the second SRS on the second carrier (block 1540) .
  • the UE e.g., using receive processor 258, transmit processor 264, controller/processor 280, memory 282, and/or the like
  • process 1500 may include transmitting the second SRS on the second carrier (block 1550) .
  • the UE e.g., using receive processor 258, transmit processor 264, controller/processor 280, memory 282, and/or the like
  • Process 1500 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.
  • determining whether to switch back to the first carrier includes determining whether to switch back to the first carrier based at least in part on a carrier switching time for switching from the second carrier to the first carrier and switching back from the first carrier to the second carrier.
  • selectively switching back to the first carrier includes determining to switch back to the first carrier based at least in part on a determination that the carrier switching time satisfies a switching time threshold.
  • selectively switching back to the first carrier includes determining to remain on the second carrier for the time gap based at least in part on a determination that the carrier switching time does not satisfy a switching time threshold.
  • determining whether to switch back to the first carrier includes determining whether to switch back to the first carrier based at least in part on what fraction of the time gap is the carrier switching time.
  • selectively switching back to the first carrier includes determining to switch back to the first carrier based at least in part on a determination that the fraction satisfies a time fraction threshold.
  • selectively switching back to the first carrier includes determining to remain on the second carrier for the time gap based at least in part on a determination that the fraction does not satisfy a time fraction threshold.
  • determining whether to switch back to the first carrier includes determining to switch back to the first carrier based at least in part on a determination that the time gap satisfies a time gap threshold.
  • process 1500 includes determining a transmission priority for the first SRS or the second SRS, or both.
  • the transmission priority can be based at least in part on any combination of the first SRS, the time gap, the second SRS, a determination to remain on the second carrier during the time gap, and a determination that there is a collision between the first SRS or the second SRS, or both, and another transmission.
  • Process 1500 also includes transmitting the first SRS includes selectively transmitting the first SRS based at least in part on a comparison of the transmission priority and information about the other transmission.
  • process 1500 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 15. Additionally, or alternatively, two or more of the blocks of process 1500 may be performed in parallel.
  • Fig. 16 is a diagram illustrating an example process 1600 performed, for example, by a base station configured to communicate with a UE configured to transmit communications on a first carrier, in accordance with various aspects of the present disclosure.
  • Example process 1600 is an example where the base station (e.g., BS 110 depicted in Figs. 1 and 2, BS 610 depicted in Figs. 6-8, and/or the like) performs operations associated with switching multiple SRS per carrier of multiple carriers.
  • the base station e.g., BS 110 depicted in Figs. 1 and 2, BS 610 depicted in Figs. 6-8, and/or the like
  • process 1600 may include determining that a first SRS and a second SRS are to be transmitted on a second carrier (block 1610) .
  • the base station e.g. , using transmit processor 220, receive processor 238, controller/processor 240, memory 242, and/or the like
  • process 1600 may include determining a time gap between transmission of the first SRS by the UE and transmission of the second SRS by the UE, based at least in part on a carrier switching capability of the UE (block 1620) .
  • the base station e.g., using transmit processor 220, receive processor 238, controller/processor 240, memory 242, and/or the like
  • process 1600 may include transmitting an instruction to the UE to transmit the first SRS on the second carrier and the second SRS on the second carrier (block 1630) .
  • the base station e.g., using transmit processor 220, receive processor 238, controller/processor 240, memory 242, and/or the like
  • a timing of transmission of the first SRS by the UE and the second SRS by the UE is based at least in part on the time gap.
  • Process 1600 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.
  • process 1600 includes receiving the carrier switching capability of the UE from the UE.
  • the carrier switching capability of the UE includes a carrier switching time of the UE from the second carrier to the first carrier and/or a carrier switching time of the UE from the first carrier to the second carrier.
  • process 1600 includes configuring one or more of a length of the first SRS or a length of the second SRS based at least in part on the time gap and the carrier switching capability of the UE.
  • the first SRS corresponds to a first set of antennas of the UE
  • the second SRS corresponds to a second set of antennas of the UE.
  • process 1600 may include additional blocks, fewer blocks, different blocks, or differently arranged blocks than those depicted in Fig. 16. Additionally, or alternatively, two or more of the blocks of process 1600 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.

Landscapes

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

Abstract

Divers aspects de la présente invention concernent généralement la commutation de signaux de référence de sondage (SRS) par porteuse sur de multiples porteuses. Dans certains aspects, un équipement utilisateur (UE) configuré pour transmettre des communications sur une première porteuse peut recevoir une instruction pour transmettre un premier SRS et un second SRS sur une seconde porteuse, passer de la première porteuse à la seconde porteuse, et transmettre le premier SRS sur la seconde porteuse. L'UE peut sélectivement retourner à la première porteuse sur la base, au moins en partie, d'un intervalle de temps entre la transmission du premier SRS et la transmission du second SRS sur la seconde porteuse. De nombreux autres aspects sont fournis.
PCT/CN2020/073948 2020-01-23 2020-01-23 Commutation de porteuses pour de multiples signaux de référence de sondage par porteuse WO2021147061A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/073948 WO2021147061A1 (fr) 2020-01-23 2020-01-23 Commutation de porteuses pour de multiples signaux de référence de sondage par porteuse

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/CN2020/073948 WO2021147061A1 (fr) 2020-01-23 2020-01-23 Commutation de porteuses pour de multiples signaux de référence de sondage par porteuse

Publications (1)

Publication Number Publication Date
WO2021147061A1 true WO2021147061A1 (fr) 2021-07-29

Family

ID=76992760

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2020/073948 WO2021147061A1 (fr) 2020-01-23 2020-01-23 Commutation de porteuses pour de multiples signaux de référence de sondage par porteuse

Country Status (1)

Country Link
WO (1) WO2021147061A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017177887A1 (fr) * 2016-04-11 2017-10-19 Telefonaktiebolaget Lm Ericsson (Publ) Procédé et appareil de facilitation d'émission de signal de référence
WO2018005481A1 (fr) * 2016-06-29 2018-01-04 Qualcomm Incorporated Antennes multiples et valeurs temporelles d'interruption pour commutation de signal de référence de sondage (srs)

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017177887A1 (fr) * 2016-04-11 2017-10-19 Telefonaktiebolaget Lm Ericsson (Publ) Procédé et appareil de facilitation d'émission de signal de référence
WO2018005481A1 (fr) * 2016-06-29 2018-01-04 Qualcomm Incorporated Antennes multiples et valeurs temporelles d'interruption pour commutation de signal de référence de sondage (srs)

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
HUAWEI, HISILICON: "SRS subframe design for SRS carrier based switching", 3GPP DRAFT; R1-164107, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Nanjing, China; 20160523 - 20160527, 14 May 2016 (2016-05-14), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051090095 *
HUAWEI, HISILICON: "SRS symbol positions for SRS switching", 3GPP DRAFT; R1-166127, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Gothenburg, Sweden; 20160822 - 20160826, 21 August 2016 (2016-08-21), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051140074 *

Similar Documents

Publication Publication Date Title
US11343824B2 (en) Carrier switching and antenna switching for a target carrier combination
EP4027568A1 (fr) Configurations de signal de référence de sondage pour prendre en charge des transmissions en liaison montante présentant une diversité de retard cyclique
US11805435B2 (en) Deriving CSI using a subset of configured CSI-RS resources
US11996922B2 (en) Techniques for channel state information processing unit occupancy determination for layer 1 signal to interference plus noise ratio reporting
US11424800B2 (en) Techniques for scheduling a front-loaded sidelink channel state information reference signal
US20200366407A1 (en) Capability-based bandwidth part switching
EP3925314B1 (fr) État de surveillance réduite
US11589323B2 (en) Minimum time gap for uplink transmission in multiple timing advance groups
WO2019157762A1 (fr) Techniques et appareils de détermination d'état de canal ou de signalisation de référence à préemption de trafic
EP3785386B1 (fr) Rapport d'indicateur de qualité de canal (cqi) basé sur un accès multiple non orthogonal (noma)
WO2021011107A1 (fr) Sélection autonome d'un faisceau de canal physique de commande de liaison descendante
WO2021253262A1 (fr) Traitement d'informations de commande de liaison descendante à deux étages
WO2021232390A1 (fr) Configuration d'informations de commande de liaison descendante de signaux de référence de sondage communs d'un groupe
EP4111632A1 (fr) Relation de groupage par signal de référence de canal partagé à une indication de préemption
EP4098036A1 (fr) Instruction d'avance temporelle dans des informations de commande de liaison descendante
EP4074117A1 (fr) Techniques pour rapporter une capacité de rang pour une configuration de point d'émission-réception multiple
WO2021147061A1 (fr) Commutation de porteuses pour de multiples signaux de référence de sondage par porteuse
WO2021159692A1 (fr) Signal de référence de sondage apériodique multi-créneau
WO2021036694A1 (fr) Configuration d'intervalles de garde pour porteuses de liaison montante multiples
WO2021147118A1 (fr) Réduction de complexité pour détermination de format d'intervalle
WO2021226855A1 (fr) Gestion de collision pour période de garde de signal de référence de sondage et transmission de pusch
WO2021179193A1 (fr) Accès basé sur un conflit et permettant une transmission en liaison montante avec agrégation de porteuses
WO2021203346A1 (fr) Connectivité de données de nouvelle radio à partir d'un réseau non autonome
WO2021142708A1 (fr) Indication de faisceau pour un canal de commande de liaison montante physique

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 20915539

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 20915539

Country of ref document: EP

Kind code of ref document: A1