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WO2021237494A1 - Appareil et techniques de commutation de faisceau - Google Patents

Appareil et techniques de commutation de faisceau Download PDF

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Publication number
WO2021237494A1
WO2021237494A1 PCT/CN2020/092508 CN2020092508W WO2021237494A1 WO 2021237494 A1 WO2021237494 A1 WO 2021237494A1 CN 2020092508 W CN2020092508 W CN 2020092508W WO 2021237494 A1 WO2021237494 A1 WO 2021237494A1
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Prior art keywords
snr
parameter
measurement
delta
results
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English (en)
Inventor
Yuankun ZHU
Zhuoqi XU
Pan JIANG
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Qualcomm Inc
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Qualcomm Inc
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Priority to PCT/CN2020/092508 priority Critical patent/WO2021237494A1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/06—Reselecting a communication resource in the serving access point

Definitions

  • aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for beam switching.
  • Wireless communication systems are widely deployed to provide various telecommunication services such as telephony, video, data, messaging, broadcasts, etc. These 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, etc. ) .
  • available system resources e.g., bandwidth, transmit power, etc.
  • multiple-access systems examples include 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems, LTE Advanced (LTE-A) systems, 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, and time division synchronous code division multiple access (TD-SCDMA) systems, to name a few.
  • 3GPP 3rd Generation Partnership Project
  • LTE Long Term Evolution
  • LTE-A LTE Advanced
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single-carrier frequency division multiple access
  • TD-SCDMA time division synchronous code division multiple access
  • New radio e.g., 5G NR
  • 5G NR is an example of an emerging telecommunication standard.
  • NR is a set of enhancements to the LTE mobile standard promulgated by 3GPP.
  • 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 OFDMA with a cyclic prefix (CP) on the downlink (DL) and on the uplink (UL) .
  • CP cyclic prefix
  • NR supports beamforming, multiple-input multiple-output (MIMO) antenna technology, and carrier aggregation.
  • MIMO multiple-input multiple-output
  • the method generally includes receiving signaling associated with a candidate beam for beam switching, performing a reference signal (RS) measurement for the candidate beam, calculating a delta signal-to-noise ratio (SNR) parameter representing a difference between a SNR of a serving beam and a SNR of the candidate beam, and deciding whether to report results of the RS measurement based on the delta SNR parameter.
  • RS reference signal
  • SNR delta signal-to-noise ratio
  • the apparatus generally includes a memory, and one or more processors, the memory and the one or more processors being configured to receive signaling associated with a candidate beam for beam switching, perform a reference signal (RS) measurement for the candidate beam, calculate a delta signal-to-noise ratio (SNR) parameter representing a difference between a SNR of a serving beam and a SNR of the candidate beam, and decide whether to report results of the RS measurement based on the delta SNR parameter.
  • RS reference signal
  • SNR delta signal-to-noise ratio
  • the apparatus generally includes means for receiving signaling associated with a candidate beam for beam switching, means for performing a reference signal (RS) measurement for the candidate beam, means for calculating a delta signal-to-noise ratio (SNR) parameter representing a difference between a SNR of a serving beam and a SNR of the candidate beam, and means for deciding whether to report results of the RS measurement based on the delta SNR parameter.
  • RS reference signal
  • SNR delta signal-to-noise ratio
  • Certain aspects of the subject matter described in this disclosure can be implemented in a computer-readable medium having instructions stored thereon to cause a user-equipment (UE) to receive signaling associated with a candidate beam for beam switching, perform a reference signal (RS) measurement for the candidate beam, calculate a delta signal-to-noise ratio (SNR) parameter representing a difference between a SNR of a serving beam and a SNR of the candidate beam, and decide whether to report results of the RS measurement based on the delta SNR parameter.
  • UE user-equipment
  • RS reference signal
  • SNR delta signal-to-noise ratio
  • aspects of the present disclosure provide means for, apparatus, processors, and computer-readable mediums for performing the methods described herein.
  • the one or more aspects comprise the features hereinafter fully described and particularly pointed out in the claims.
  • the following description and the appended drawings set forth in detail certain illustrative features of the one or more aspects. These features are indicative, however, of but a few of the various ways in which the principles of various aspects may be employed.
  • FIG. 1 is a block diagram conceptually illustrating an example telecommunications system, in accordance with certain aspects of the present disclosure.
  • FIG. 2 is a block diagram conceptually illustrating a design of an example a base station (BS) and user equipment (UE) , in accordance with certain aspects of the present disclosure.
  • BS base station
  • UE user equipment
  • FIG. 3 is an example frame format for new radio (NR) , in accordance with certain aspects of the present disclosure.
  • FIG. 4 is a flow diagram illustrating example operations for wireless communication by a UE, in accordance with certain aspects of the present disclosure.
  • FIG. 5 is a flow diagram illustrating example operations for reference signal (RS) measurement reporting, in accordance with certain aspects of the present disclosure.
  • RS reference signal
  • FIG. 6 illustrates a communications device that may include various components configured to perform operations for the techniques disclosed herein in accordance with aspects of the present disclosure.
  • the UE may receive synchronization signal blocks (SSBs) , each associated with a candidate beam for beam switching.
  • the UE performs reference signal (RS) measurement (e.g., RS receive power (RSRP) measurement) on each of the SSBs, and report the results to a base station (BS) , to be used for selecting of a beam to be used for communication.
  • RS reference signal
  • BS base station
  • the UE may also measure a signal-to-noise ratio (SNR) for each of the candidate beams, and modify the reporting of RSRP in an attempt to increase the likelihood that the BS selects the best beam for communication.
  • SNR signal-to-noise ratio
  • 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.
  • RAT may also be referred to as a radio technology, an air interface, etc.
  • a frequency may also be referred to as a carrier, a subcarrier, a frequency channel, a tone, a subband, etc.
  • Each frequency may support a single RAT in a given geographic area in order to avoid interference between wireless networks of different RATs.
  • the techniques described herein may be used for various wireless networks and radio technologies. While aspects may be described herein using terminology commonly associated with 3G, 4G, and/or new radio (e.g., 5G NR) wireless technologies, aspects of the present disclosure can be applied in other generation-based communication systems.
  • 3G, 4G, and/or new radio e.g., 5G NR
  • NR access may support various wireless communication services, such as enhanced mobile broadband (eMBB) targeting wide bandwidth (e.g., 80 MHz or beyond) , millimeter wave (mmW) targeting high carrier frequency (e.g., 25 GHz or beyond) , massive machine type communications MTC (mMTC) targeting non-backward compatible MTC techniques, and/or mission critical targeting ultra-reliable low-latency communications (URLLC) .
  • eMBB enhanced mobile broadband
  • mmW millimeter wave
  • mMTC massive machine type communications MTC
  • URLLC ultra-reliable low-latency communications
  • These services may include latency and reliability requirements.
  • These services may also have different transmission time intervals (TTI) to meet respective quality of service (QoS) requirements.
  • TTI transmission time intervals
  • QoS quality of service
  • these services may co-exist in the same subframe.
  • NR supports beamforming and beam direction may be dynamically configured. MIMO transmissions with precoding may also be supported.
  • MIMO configurations in the DL may support up to 8 transmit antennas with multi-layer DL transmissions up to 8 streams and up to 2 streams per UE. Multi-layer transmissions with up to 2 streams per UE may be supported. Aggregation of multiple cells may be supported with up to 8 serving cells.
  • FIG. 1 illustrates an example wireless communication network 100 in which aspects of the present disclosure may be performed.
  • the wireless communication network 100 may be an NR system (e.g., a 5G NR network) .
  • the wireless communication network 100 may be in communication with a core network 132.
  • the core network 132 may in communication with one or more base station (BSs) 110 and/or user equipment (UE) 120 in the wireless communication network 100 via one or more interfaces.
  • BSs base station
  • UE user equipment
  • the wireless communication network 100 may include a number of BSs 110a-z (each also individually referred to herein as BS 110 or collectively as BSs 110) and other network entities.
  • a BS 110 may provide communication coverage for a particular geographic area, sometimes referred to as a “cell” , which may be stationary or may move according to the location of a mobile BS 110.
  • the BSs 110 may be interconnected to one another and/or to one or more other BSs or network nodes (not shown) in wireless communication network 100 through various types of backhaul interfaces (e.g., a direct physical connection, a wireless connection, a virtual network, or the like) using any suitable transport network.
  • backhaul interfaces e.g., a direct physical connection, a wireless connection, a virtual network, or the like
  • the BSs 110a, 110b and 110c may be macro BSs for the macro cells 102a, 102b and 102c, respectively.
  • the BS 110x may be a pico BS for a pico cell 102x.
  • the BSs 110y and 110z may be femto BSs for the femto cells 102y and 102z, respectively.
  • a BS may support one or multiple cells.
  • a network controller 130 may couple to a set of BSs 110 and provide coordination and control for these BSs 110 (e.g., via a backhaul) .
  • the BSs 110 communicate with UEs 120a-y (each also individually referred to herein as UE 120 or collectively as UEs 120) in the wireless communication network 100.
  • the UEs 120 (e.g., 120x, 120y, etc. ) may be dispersed throughout the wireless communication network 100, and each UE 120 may be stationary or mobile.
  • Wireless communication network 100 may also include relay stations (e.g., relay station 110r) , also referred to as relays or the like, that receive a transmission of data and/or other information from an upstream station (e.g., a BS 110a or a UE 120r) and sends a transmission of the data and/or other information to a downstream station (e.g., a UE 120 or a BS 110) , or that relays transmissions between UEs 120, to facilitate communication between devices.
  • relay stations e.g., relay station 110r
  • relays or the like that receive a transmission of data and/or other information from an upstream station (e.g., a BS 110a or a UE 120r) and sends a transmission of the data and/or other information to a downstream station (e.g., a UE 120 or a BS 110) , or that relays transmissions between UEs 120, to facilitate communication between devices.
  • the BSs 110 and UEs 120 may be configured for beam switching.
  • the UE 120a includes a beam manager 112.
  • the beam manager 112 may be configured to receive signaling associated with a candidate beam for beam switching, perform a reference signal (RS) measurement for the candidate beam, calculate a delta signal-to-noise ratio (SNR) parameter representing a difference between a SNR of a serving beam and a SNR of the candidate beam, and decide whether to report results of the RS measurement based on the delta SNR parameter, in accordance with aspects of the present disclosure.
  • RS reference signal
  • SNR delta signal-to-noise ratio
  • FIG. 2 illustrates example components of BS 110a and UE 120a (e.g., in the wireless communication network 100 of FIG. 1) , which may be used to implement aspects of the present disclosure.
  • a transmit processor 220 may receive data from a data source 212 and control information from a controller/processor 240.
  • the control information may be for the physical broadcast channel (PBCH) , physical control format indicator channel (PCFICH) , physical hybrid ARQ indicator channel (PHICH) , physical downlink control channel (PDCCH) , group common PDCCH (GC PDCCH) , etc.
  • the data may be for the physical downlink shared channel (PDSCH) , etc.
  • a medium access control (MAC) -control element (MAC-CE) is a MAC layer communication structure that may be used for control command exchange between wireless nodes.
  • the MAC-CE may be carried in a shared channel such as a physical downlink shared channel (PDSCH) , a physical uplink shared channel (PUSCH) , or a physical sidelink shared channel (PSSCH) .
  • PDSCH physical downlink shared channel
  • PUSCH physical uplink shared channel
  • PSSCH physical sidelink shared channel
  • the processor 220 may process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively.
  • the transmit processor 220 may also generate reference symbols, such as for the primary synchronization signal (PSS) , secondary synchronization signal (SSS) , and channel state information reference signal (CSI-RS) .
  • a transmit (TX) multiple-input multiple-output (MIMO) processor 230 may perform spatial processing (e.g., precoding) on the data symbols, the control symbols, and/or the reference symbols, if applicable, and may provide output symbol streams to the modulators (MODs) 232a-232t. Each modulator 232 may process a respective output symbol stream (e.g., for OFDM, etc. ) to obtain an output sample stream.
  • MIMO multiple-input multiple-output
  • Each modulator may further process (e.g., convert to analog, amplify, filter, and upconvert) the output sample stream to obtain a downlink signal.
  • Downlink signals from modulators 232a-232t may be transmitted via the antennas 234a-234t, respectively.
  • the antennas 252a-252r may receive the downlink signals from the BS 110a and may provide received signals to the demodulators (DEMODs) in transceivers 254a-254r, respectively.
  • Each demodulator 254 may condition (e.g., filter, amplify, downconvert, and digitize) a respective received signal to obtain input samples.
  • Each demodulator may further process the input samples (e.g., for OFDM, etc. ) to obtain received symbols.
  • a MIMO detector 256 may obtain received symbols from all the demodulators 254a-254r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • a receive processor 258 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 120a to a data sink 260, and provide decoded control information to a controller/processor 280.
  • a transmit processor 264 may receive and process data (e.g., for the physical uplink shared channel (PUSCH) ) from a data source 262 and control information (e.g., for the physical uplink control channel (PUCCH) from the controller/processor 280.
  • the transmit processor 264 may also generate reference symbols for a reference signal (e.g., for the sounding reference signal (SRS) ) .
  • the symbols from the transmit processor 264 may be precoded by a TX MIMO processor 266 if applicable, further processed by the modulators in transceivers 254a-254r (e.g., for SC-FDM, etc. ) , and transmitted to the BS 110a.
  • the uplink signals from the UE 120a may be received by the antennas 234, processed by the modulators 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 the UE 120a.
  • the receive processor 238 may provide the decoded data to a data sink 239 and the decoded control information to the controller/processor 240.
  • the memories 242 and 282 may store data and program codes for BS 110a and UE 120a, respectively.
  • a scheduler 244 may schedule UEs for data transmission on the downlink and/or uplink.
  • Antennas 252, processors 266, 258, 264, and/or controller/processor 280 of the UE 120a and/or antennas 234, processors 220, 230, 238, and/or controller/processor 240 of the BS 110a may be used to perform the various techniques and methods described herein.
  • the controller/processor 280 of the UE 120a has the beam manager 122, according to aspects described herein.
  • other components of the UE 120a and BS 110a may be used to perform the operations described herein.
  • NR may utilize orthogonal frequency division multiplexing (OFDM) with a cyclic prefix (CP) on the uplink and downlink.
  • OFDM orthogonal frequency division multiplexing
  • CP cyclic prefix
  • NR may support half-duplex operation using time division duplexing (TDD) .
  • OFDM and single-carrier frequency division multiplexing (SC-FDM) partition the system bandwidth into multiple orthogonal subcarriers, which are also commonly referred to as tones, bins, etc. Each subcarrier may be modulated with data. Modulation symbols may be sent in the frequency domain with OFDM and in the time domain with SC-FDM.
  • the spacing between adjacent subcarriers may be fixed, and the total number of subcarriers may be dependent on the system bandwidth.
  • the minimum resource allocation may be 12 consecutive subcarriers.
  • the system bandwidth may also be partitioned into subbands. For example, a subband may cover multiple RBs.
  • NR may support a base subcarrier spacing (SCS) of 15 KHz and other SCS may be defined with respect to the base SCS (e.g., 30 kHz, 60 kHz, 120 kHz, 240 kHz, etc. ) .
  • SCS base subcarrier spacing
  • FIG. 3 is a diagram showing an example of a frame format 300 for NR.
  • the transmission timeline for each of the downlink and uplink may be partitioned into units of radio frames.
  • Each radio frame may have a predetermined duration (e.g., 10 ms) and may be partitioned into 10 subframes, each of 1 ms, with indices of 0 through 9.
  • Each subframe may include a variable number of slots (e.g., 1, 2, 4, 8, 16, ...slots) depending on the SCS.
  • Each slot may include a variable number of symbol periods (e.g., 7 or 14 symbols) depending on the SCS.
  • the symbol periods in each slot may be assigned indices.
  • a mini-slot which may be referred to as a sub-slot structure, refers to a transmit time interval having a duration less than a slot (e.g., 2, 3, or 4 symbols) .
  • Each symbol in a slot may indicate a link direction (e.g., DL, UL, or flexible) for data transmission and the link direction for each subframe may be dynamically switched.
  • the link directions may be based on the slot format.
  • Each slot may include DL/UL data as well as DL/UL control information.
  • a UE operating in a fifth-generation (5G) radio resource control (RRC) connected (RRC_CONNECTED) state may be operating using multiple beams by transferring from one beam to another beam to well adapt to changing radio conditions. This process may be referred to as a beam switching. Beam switching is controlled by the network based, at least in part, on reference signal (RS) receive power (RSRP) of candidate beams or synchronization signal blocks (SSB) as reported by the UE.
  • RS reference signal
  • RSRP receive power
  • SSB synchronization signal blocks
  • the selection of a beam by the network to be used by the UE may not always be accurate. For example, due to complicated radio environment and interference, the beam having the strongest RSRP as reported to the network by the UE may not be the best beam.
  • the network may configure the UE to use one of candidate beams that may results in decreased throughput, resulting in user dissatisfaction.
  • the UE may only provide an SSB RSRP report to facilitate beam switching.
  • the network may be unaware of the measured signal-t-noise ratio (SNR) of the reported beams.
  • the UE may be able to measure the SNR of candidate beams.
  • Certain aspects of the present disclosure provide techniques for RS measurement (e.g., RSRP) reporting for candidate beams by taking into account the SNR of the beams.
  • FIG. 4 is a flow diagram illustrating example operations 400 for wireless communication, in accordance with certain aspects of the present disclosure.
  • the operations 400 may be performed, for example, by UE (e.g., such as a UE 120a in the wireless communication network 100) .
  • the operations 400 may be complimentary operations by the UE to the operations 400 performed by the BS.
  • Operations 400 may be implemented as software components that are executed and run on one or more processors (e.g., controller/processor 280 of FIG. 2) . Further, the transmission and reception of signals by the UE in operations 400 may be enabled, for example, by one or more antennas (e.g., antennas 252 of FIG. 2) . In certain aspects, the transmission and/or reception of signals by the UE may be implemented via a bus interface of one or more processors (e.g., controller/processor 280) obtaining and/or outputting signals.
  • processors e.g., controller/processor 280
  • the operations 400 may begin, at block 405, with the UE receiving signaling associated with a candidate beam for beam switching.
  • the UE may perform a RS measurement for the candidate beam, and at block 415, calculate a delta SNR parameter representing a difference between a SNR of a serving beam (e.g., a current beam configured for communication at the UE) and a SNR of the candidate beam.
  • the UE may decide whether to report results of the RS measurement based on the delta SNR parameter. For example, deciding whether to report the results of the RS measurement may include determining to apply an adjustment parameter to results of the RS measurement based on the delta SNR parameter to calculate an RS measurement parameter to be reported for the candidate beam, as described in more detail herein.
  • the UE may transmit an indication of the RS measurement parameter.
  • deciding whether to report the results of the RS measurement may include comparing the delta SNR parameter to one or more thresholds, where applying the adjustment parameter to the results of the RS measurement is based on the comparison, as described in more detail herein.
  • FIG. 5 is a flow diagram illustrating example operations 500 for RS measurement (e.g., RSRP measurement) reporting, in accordance with certain aspects of the present disclosure.
  • the UE may be in 5G RRC_CONNECTED state.
  • the UE may perform measurement of SSBs for beam switching. For example, the UE may perform RSRP and SNR measurements on various SSBs associated with candidate beams.
  • the UE may determine whether an SNR of a candidate beam (C_SNR) is greater than or equal to an SNR of a current serving beam (S_SNR) of the UE. If so, at block 506, the UE may determine to report the RSRP of the candidate beam without any adjustments to the RSRP. For example, at block 508, channel state feedback (CSF) SSB reporting may occur, accordingly.
  • CSF channel state feedback
  • the UE may determine a delta SNR parameter representing a difference between the S_SNR and the C_SNR (e.g., S_SNR –C_SNR) , and compare the delta SNR parameter to a threshold. For example, if the delta SNR parameter is less than or equal to 3dB, the UE may apply, at block 512, a first adjustment to the measured RSRP (M_RSRP) to determine an RSRP to be reported (R_RSRP) . For instance, R_RSRP may be equal to M_RSRP –3db. The UE may then report the R_RSRP at block 508, accordingly.
  • M_RSRP measured RSRP
  • R_RSRP RSRP
  • R_RSRP may be equal to M_RSRP –3db.
  • the UE may determine whether the delta SNR parameter is greater than the first threshold (e.g., 3dB) , but less than a second threshold (e.g., 6dB) . If so, the UE may apply, at block 516, a second adjustment to the measured RSRP (M_RSRP) to determine an RSRP to be reported (R_RSRP) .
  • M_RSRP measured RSRP
  • R_RSRP may be equal to M_RSRP –6db.
  • the UE may determine whether the delta SNR parameter is greater than the second threshold (e.g., 6dB) . If so, the UE may determine, at block 520, to forgo reporting the RSRP for the candidate beam.
  • the second threshold e.g. 6dB
  • any number of thresholds may be used.
  • UE may only compare the delta SNR to a single threshold, and determine whether to adjust or forgo reporting of the RSRP accordingly.
  • the UE may compare the delta SNR to more than two thresholds, and apply a different adjustment to the M_RSRP for each threshold.
  • the operations 500 describe techniques for reporting an RSRP for a single candidate beam to facilitate understanding, the aspects described herein may be applied for any number of candidate beams.
  • a UE may receive multiple SSBs, each associated with a different candidate beam. The UE may perform the operations 500 for each of the candidate beams and report the R_RSRPs accordingly.
  • FIG. 6 illustrates a communications device 600 that may include various components (e.g., corresponding to means-plus-function components) configured to perform operations for the techniques disclosed herein, such as the operations illustrated in FIG. 4.
  • the communications device 600 includes a processing system 602 coupled to a transceiver 608 (e.g., a transmitter and/or a receiver) .
  • the transceiver 608 is configured to transmit and receive signals for the communications device 600 via an antenna 610, such as the various signals as described herein.
  • the processing system 602 may be configured to perform processing functions for the communications device 600, including processing signals received and/or to be transmitted by the communications device 600.
  • the processing system 602 includes a processor 604 coupled to a computer-readable medium/memory 612 via a bus 606.
  • the computer-readable medium/memory 612 is configured to store instructions (e.g., computer-executable code) that when executed by the processor 604, cause the processor 604 to perform the operations illustrated in FIG. 4, or other operations for performing the various techniques discussed herein for beam switching.
  • computer-readable medium/memory 612 stores code 614 for receiving/transmitting; code 616 for measurement (e.g., RS measurement) or calculating (e.g., calculating SNR) ; code 618 for deciding or comparing; and code 620 for applying an adjustment parameter.
  • the processor 604 has circuitry configured to implement the code stored in the computer-readable medium/memory 612.
  • the processor 604 includes circuitry 622 for receiving/transmitting; circuitry 624 for measurement (e.g., RS measurement) or calculating (e.g., calculating SNR) ; circuitry 626 for deciding or comparing; and circuitry 628 for applying an adjustment parameter.
  • NR e.g., 5G NR
  • LTE Long Term Evolution
  • LTE-A LTE-Advanced
  • CDMA code division multiple access
  • TDMA time division multiple access
  • FDMA frequency division multiple access
  • OFDMA orthogonal frequency division multiple access
  • SC-FDMA single-carrier frequency division multiple access
  • TD-SCDMA time division synchronous code division multiple access
  • a CDMA network may implement a radio technology such as Universal Terrestrial Radio Access (UTRA) , cdma2000, etc.
  • UTRA Universal Terrestrial Radio Access
  • UTRA includes Wideband CDMA (WCDMA) and other variants of CDMA.
  • cdma2000 covers IS-2000, IS-95 and IS-856 standards.
  • a TDMA network may implement a radio technology such as Global System for Mobile Communications (GSM) .
  • GSM Global System for Mobile Communications
  • An OFDMA network may implement a radio technology such as NR (e.g. 5G RA) , Evolved UTRA (E-UTRA) , Ultra Mobile Broadband (UMB) , IEEE 802.11 (Wi-Fi) , IEEE 802.16 (WiMAX) , IEEE 802.20, Flash-OFDMA, etc.
  • NR e.g. 5G RA
  • E-UTRA Evolved UTRA
  • UMB Ultra Mobile Broadband
  • IEEE 802.11 Wi-Fi
  • IEEE 802.16 WiMAX
  • IEEE 802.20 Flash-OFDMA
  • UTRA and E-UTRA are part of Universal Mobile Telecommunication System (UMTS) .
  • LTE and LTE-A are releases of UMTS that use E-UTRA.
  • UTRA, E-UTRA, UMTS, LTE, LTE-A and GSM are described in documents from an organization named “3rd Generation Partnership Project” (3GPP) .
  • cdma2000 and UMB are described in documents from an organization named “3rd Generation Partnership Project 2” (3GPP2) .
  • NR is an emerging wireless communications technology under development.
  • the term “cell” can refer to a coverage area of a Node B (NB) and/or a NB subsystem serving this coverage area, depending on the context in which the term is used.
  • NB Node B
  • BS next generation NodeB
  • AP access point
  • DU distributed unit
  • TRP transmission reception point
  • a BS may provide communication coverage for a macro cell, a pico cell, a femto cell, and/or other types of cells.
  • 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 an association with the femto cell (e.g., UEs in a Closed Subscriber Group (CSG) , UEs for users in the home, etc. ) .
  • 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 UE may also be referred to as a mobile station, a terminal, an access terminal, a subscriber unit, a station, a Customer Premises Equipment (CPE) , a cellular phone, 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 computer, a camera, a gaming device, a netbook, a smartbook, an ultrabook, an appliance, a medical device or medical equipment, a biometric sensor/device, a wearable device such as a smart watch, smart clothing, smart glasses, a smart wrist band, smart jewelry (e.g., a smart ring, a smart bracelet, etc.
  • CPE Customer Premises Equipment
  • PDA personal digital assistant
  • WLL wireless local loop
  • MTC machine-type communication
  • eMTC evolved MTC
  • MTC and eMTC UEs include, for example, robots, drones, remote devices, sensors, meters, monitors, location tags, etc., that may communicate with a BS, 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.
  • a network e.g., a wide area network such as Internet or a cellular network
  • Some UEs may be considered Internet-of-Things (IoT) devices, which may be narrowband IoT (NB-IoT) devices.
  • IoT Internet-of-Things
  • NB-IoT narrowband IoT
  • a scheduling entity (e.g., a BS) allocates resources for communication among some or all devices and equipment within its service area or cell.
  • the scheduling entity may be responsible for scheduling, assigning, reconfiguring, and releasing resources for one or more subordinate entities. That is, for scheduled communication, subordinate entities utilize resources allocated by the scheduling entity.
  • Base stations are not the only entities that may function as a scheduling entity.
  • a UE may function as a scheduling entity and may schedule resources for one or more subordinate entities (e.g., one or more other UEs) , and the other UEs may utilize the resources scheduled by the UE for wireless communication.
  • a UE may function as a scheduling entity in a peer-to-peer (P2P) network, and/or in a mesh network.
  • P2P peer-to-peer
  • UEs may communicate directly with one another in addition to communicating with a scheduling entity.
  • the methods disclosed herein comprise one or more steps or actions for achieving the methods.
  • the method steps and/or actions may be interchanged with one another without departing from the scope of the claims.
  • the order and/or use of specific steps and/or actions may be modified without departing from the scope of the claims.
  • a phrase referring to “at least one of” a list of items refers to any combination of those items, including single members.
  • “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) .
  • determining encompasses a wide variety of actions. For example, “determining” may include calculating, computing, processing, deriving, investigating, looking up (e.g., looking up in a table, a database or another data structure) , ascertaining and the like. Also, “determining” may include receiving (e.g., receiving information) , accessing (e.g., accessing data in a memory) and the like. Also, “determining” may include resolving, selecting, choosing, establishing and the like.
  • the various operations of methods described above may be performed by any suitable means capable of performing the corresponding functions.
  • the means may include various hardware and/or software component (s) and/or module (s) , including, but not limited to a circuit, an application specific integrated circuit (ASIC) , or processor.
  • ASIC application specific integrated circuit
  • DSP digital signal processor
  • ASIC application specific integrated circuit
  • FPGA field programmable gate array
  • PLD programmable logic device
  • a general- purpose processor may be a microprocessor, but in the alternative, the processor may be any commercially available processor, controller, microcontroller, or state machine.
  • a processor may also be implemented as a combination of computing devices, e.g., a combination of a DSP and a microprocessor, a plurality of microprocessors, one or more microprocessors in conjunction with a DSP core, or any other such configuration.
  • an example hardware configuration may comprise a processing system in a wireless node.
  • the processing system may be implemented with a bus architecture.
  • the bus may include any number of interconnecting buses and bridges depending on the specific application of the processing system and the overall design constraints.
  • the bus may link together various circuits including a processor, machine-readable media, and a bus interface.
  • the bus interface may be used to connect a network adapter, among other things, to the processing system via the bus.
  • the network adapter may be used to implement the signal processing functions of the PHY layer.
  • a user interface e.g., keypad, display, mouse, joystick, etc.
  • a user interface e.g., keypad, display, mouse, joystick, etc.
  • the bus may also link various other circuits such as timing sources, peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further.
  • the processor may be implemented with one or more general-purpose and/or special-purpose processors. Examples include microprocessors, microcontrollers, DSP processors, and other circuitry that can execute software. Those skilled in the art will recognize how best to implement the described functionality for the processing system depending on the particular application and the overall design constraints imposed on the overall system.
  • the functions may be stored or transmitted over as one or more instructions or code on a computer readable medium.
  • Software shall be construed broadly to mean instructions, data, or any combination thereof, whether referred to as software, firmware, middleware, microcode, hardware description language, or otherwise.
  • Computer-readable media include both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another.
  • the processor may be responsible for managing the bus and general processing, including the execution of software modules stored on the machine-readable storage media.
  • a computer-readable storage medium may be coupled to a processor such that the processor can read information from, and write information to, the storage medium. In the alternative, the storage medium may be integral to the processor.
  • the machine-readable media may include a transmission line, a carrier wave modulated by data, and/or a computer readable storage medium with instructions stored thereon separate from the wireless node, all of which may be accessed by the processor through the bus interface.
  • the machine-readable media, or any portion thereof may be integrated into the processor, such as the case may be with cache and/or general register files.
  • machine-readable storage media may include, by way of example, RAM (Random Access Memory) , flash memory, ROM (Read Only Memory) , PROM (Programmable Read-Only Memory) , EPROM (Erasable Programmable Read-Only Memory) , EEPROM (Electrically Erasable Programmable Read-Only Memory) , registers, magnetic disks, optical disks, hard drives, or any other suitable storage medium, or any combination thereof.
  • RAM Random Access Memory
  • ROM Read Only Memory
  • PROM Programmable Read-Only Memory
  • EPROM Erasable Programmable Read-Only Memory
  • EEPROM Electrical Erasable Programmable Read-Only Memory
  • registers magnetic disks, optical disks, hard drives, or any other suitable storage medium, or any combination thereof.
  • the machine-readable media may be embodied in a computer-program product.
  • a software module may comprise a single instruction, or many instructions, and may be distributed over several different code segments, among different programs, and across multiple storage media.
  • the computer-readable media may comprise a number of software modules.
  • the software modules include instructions that, when executed by an apparatus such as a processor, cause the processing system to perform various functions.
  • the software modules may include a transmission module and a receiving module. Each software module may reside in a single storage device or be distributed across multiple storage devices.
  • a software module may be loaded into RAM from a hard drive when a triggering event occurs.
  • the processor may load some of the instructions into cache to increase access speed.
  • One or more cache lines may then be loaded into a general register file for execution by the processor.
  • any connection is properly termed a computer-readable medium.
  • the software is transmitted from a website, server, or other remote source using a coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL) , or wireless technologies such as infrared (IR) , radio, and microwave
  • the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of medium.
  • Disk and disc include compact disc (CD) , laser disc, optical disc, digital versatile disc (DVD) , floppy disk, and disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers.
  • computer-readable media may comprise non-transitory computer-readable media (e.g., tangible media) .
  • computer-readable media may comprise transitory computer-readable media (e.g., a signal) . Combinations of the above should also be included within the scope of computer-readable media.
  • certain aspects may comprise a computer program product for performing the operations presented herein.
  • a computer program product may comprise a computer-readable medium having instructions stored (and/or encoded) thereon, the instructions being executable by one or more processors to perform the operations described herein, for example, instructions for performing the operations described herein and illustrated in FIG. 4.
  • modules and/or other appropriate means for performing the methods and techniques described herein can be downloaded and/or otherwise obtained by a user terminal and/or base station as applicable.
  • a user terminal and/or base station can be coupled to a server to facilitate the transfer of means for performing the methods described herein.
  • various methods described herein can be provided via storage means (e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or floppy disk, etc. ) , such that a user terminal and/or base station can obtain the various methods upon coupling or providing the storage means to the device.
  • storage means e.g., RAM, ROM, a physical storage medium such as a compact disc (CD) or floppy disk, etc.
  • CD compact disc
  • floppy disk etc.
  • any other suitable technique for providing the methods and techniques described herein to a device can be utilized.

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

Abstract

Certains aspects de l'objet de l'invention décrit dans la présente divulgation peuvent être mis en œuvre dans un procédé de communication sans fil par un équipement utilisateur (EU). Le procédé comprend généralement la réception d'une signalisation associée à un faisceau candidat pour une commutation de faisceau, l'exécution d'une mesure de signal de référence (SR) pour le faisceau candidat, le calcul d'un paramètre delta de rapport signal sur bruit (RSB) représentant une différence entre un RSB d'un faisceau de service et un RSB du faisceau candidat, et la prise de décision de rapporter ou non les résultats de la mesure de SR sur la base du paramètre delta de RSB.
PCT/CN2020/092508 2020-05-27 2020-05-27 Appareil et techniques de commutation de faisceau Ceased WO2021237494A1 (fr)

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WO2024040373A1 (fr) * 2022-08-22 2024-02-29 Qualcomm Incorporated Rapports de faisceau à granularité d'unité de ressource de fréquence

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US20110105126A1 (en) * 2009-06-15 2011-05-05 The Aerospace Corportion Terminal initiated intrasatellite antenna handover method
US20160007261A1 (en) * 2014-07-01 2016-01-07 Electronics And Telecommunications Research Institute Method and apparatus for handover
WO2018125614A1 (fr) * 2016-12-29 2018-07-05 Qualcomm Incorporated Équipement utilisateur communiquant une indication de changement de faisceau de réception
CN109076406A (zh) * 2016-03-14 2018-12-21 瑞典爱立信有限公司 用于波束切换的方法和设备
CN111148120A (zh) * 2018-11-02 2020-05-12 苹果公司 不具有波束对应的波束管理

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US20110105126A1 (en) * 2009-06-15 2011-05-05 The Aerospace Corportion Terminal initiated intrasatellite antenna handover method
US20160007261A1 (en) * 2014-07-01 2016-01-07 Electronics And Telecommunications Research Institute Method and apparatus for handover
CN109076406A (zh) * 2016-03-14 2018-12-21 瑞典爱立信有限公司 用于波束切换的方法和设备
WO2018125614A1 (fr) * 2016-12-29 2018-07-05 Qualcomm Incorporated Équipement utilisateur communiquant une indication de changement de faisceau de réception
CN111148120A (zh) * 2018-11-02 2020-05-12 苹果公司 不具有波束对应的波束管理

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2024040373A1 (fr) * 2022-08-22 2024-02-29 Qualcomm Incorporated Rapports de faisceau à granularité d'unité de ressource de fréquence

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