WO2020147779A1 - Mesures à la demande - Google Patents

Mesures à la demande Download PDF

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Publication number
WO2020147779A1
WO2020147779A1 PCT/CN2020/072433 CN2020072433W WO2020147779A1 WO 2020147779 A1 WO2020147779 A1 WO 2020147779A1 CN 2020072433 W CN2020072433 W CN 2020072433W WO 2020147779 A1 WO2020147779 A1 WO 2020147779A1
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WO
WIPO (PCT)
Prior art keywords
ssb
network
additional beams
user equipment
basic
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Application number
PCT/CN2020/072433
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English (en)
Inventor
Peng Cheng
Huichun LIU
Gavin Bernard Horn
Ozcan Ozturk
Masato Kitazoe
Prashanth Haridas Hande
Punyaslok PURKAYASTHA
Arvind Vardarajan Santhanam
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Qualcomm Incorporated
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Publication of WO2020147779A1 publication Critical patent/WO2020147779A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/16—Discovering, processing access restriction or access information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/08—Access restriction or access information delivery, e.g. discovery data delivery
    • H04W48/12—Access restriction or access information delivery, e.g. discovery data delivery using downlink control channel

Definitions

  • aspects of the present disclosure relate to wireless communications, and more particularly, to techniques for performing enhanced measurements of synchronization signals.
  • 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
  • a wireless multiple-access communication system may include a number of base stations (BSs) , which are each capable of simultaneously supporting communication for multiple communication devices, otherwise known as user equipments (UEs) .
  • BSs base stations
  • UEs user equipments
  • a set of one or more base stations may define an eNodeB (eNB) .
  • eNB eNodeB
  • a wireless multiple access communication system may include a number of distributed units (DUs) (e.g., edge units (EUs) , edge nodes (ENs) , radio heads (RHs) , smart radio heads (SRHs) , transmission reception points (TRPs) , etc.
  • DUs distributed units
  • EUs edge units
  • ENs edge nodes
  • RHs radio heads
  • SSRHs smart radio heads
  • TRPs transmission reception points
  • CUs central units
  • CNs central nodes
  • ANCs access node controllers
  • a base station or distributed unit may communicate with a set of UEs on downlink channels (e.g., for transmissions from a base station or to a UE) and uplink channels (e.g., for transmissions from a UE to a base station or distributed unit) .
  • New Radio (e.g., 5G) is an example of an emerging telecommunication standard.
  • NR is a set of enhancements to the LTE mobile standard promulgated by 3GPP. It 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
  • a first aspect provides a method for performing signal measurement in a user equipment, comprising: receiving, from a network, an indication to perform enhanced measurement of synchronization signals; measuring, within a first synchronization signal block (SSB) of a first SSB burst set: a basic SSB beam; and one or more additional beams, wherein each of the one or more additional beams has a frequency different than the basic SSB beam; and transmitting, to the network, an enhanced measurement report based on measurements of the basic SSB beam and the one or more additional beams.
  • SSB synchronization signal block
  • a second aspect provides a method for performing signal measurement in a network, comprising: transmitting, to a user equipment, an indication to perform enhanced measurement of synchronization signals; transmitting, to the user equipment, within a first synchronization signal block (SSB) : of a first SSB burst set: a basic SSB beam; and one or more additional beams, wherein each of the one or more additional beams has a frequency different than the basic SSB beam; and receiving, from the user equipment, an enhanced measurement report based on measurements of the basic SSB beam and the one or more additional beams.
  • SSB synchronization signal block
  • 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 illustrating an example logical architecture of a distributed radio access network (RAN) , in accordance with certain aspects of the present disclosure.
  • RAN radio access network
  • FIG. 3 is a diagram illustrating an example physical architecture of a distributed RAN, in accordance with certain aspects of the present disclosure.
  • FIG. 4 is a block diagram conceptually illustrating a design of an example base station (BS) and user equipment (UE) , in accordance with certain aspects of the present disclosure.
  • BS base station
  • UE user equipment
  • FIG. 5 is a diagram showing examples for implementing a communication protocol stack, in accordance with certain aspects of the present disclosure.
  • FIG. 6 illustrates an example of a frame format for a new radio (NR) system, in accordance with certain aspects of the present disclosure.
  • NR new radio
  • FIG. 7 depicts an example RRM resource configuration.
  • FIG. 8 depicts another example RRM resource configuration.
  • FIG. 9 depicts an example method for performing enhanced signal measurement in a user equipment.
  • FIG. 10 depicts an example method for performing enhanced signal measurement in a network.
  • FIG. 11 depicts another example RRM resource configuration.
  • FIG. 12 depicts an example message flow for on-demand enhanced measurements.
  • FIG. 13 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.
  • aspects of the present disclosure provide apparatus, methods, processing systems, and computer readable mediums for performing enhanced measurements of synchronization signals.
  • a CDMA network may implement a radio technology such as Universal Terrestrial Radio Access (UTRA) , cdma2000, etc.
  • 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) .
  • An OFDMA network may implement a radio technology such as NR (e.g.
  • 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) .
  • New Radio is an emerging wireless communications technology under development in conjunction with the 5G Technology Forum (5GTF) .
  • 3GPP Long Term Evolution (LTE) and LTE-Advanced (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) .
  • the techniques described herein may be used for the wireless networks and radio technologies mentioned above as well as other wireless networks and radio technologies. For clarity, while aspects may be described herein using terminology commonly associated with 3G and/or 4G wireless technologies, aspects of the present disclosure can be applied in other generation-based communication systems, such as 5G and later, including NR technologies.
  • New radio (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.
  • 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 a New Radio (NR) or 5G network in which the methods for performing enhanced measurements, as described below with respect to FIGS. 7-12 are implemented.
  • NR New Radio
  • 5G 5th Generation
  • the wireless network 100 may include a number of base stations (BSs) 110 and other network entities.
  • a BS may be a station that communicates with user equipments (UEs) .
  • Each BS 110 may provide communication coverage for a particular geographic area.
  • the term “cell” can refer to a coverage area of a Node B (NB) and/or a Node B subsystem serving this coverage area, depending on the context in which the term is used.
  • gNB next generation NodeB
  • NR BS new radio base station
  • 5G NB access point
  • AP access point
  • TRP transmission reception point
  • 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 base stations may be interconnected to one another and/or to one or more other base stations or network nodes (not shown) in wireless communication network 100 through various types of backhaul interfaces, such as a direct physical connection, a wireless connection, a virtual network, or the like using any suitable transport network.
  • 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, 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.
  • NR or 5G RAT networks may be deployed.
  • a base station 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. ) .
  • CSG Closed Subscriber Group
  • 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.
  • 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 (e.g., three) cells.
  • Wireless communication network 100 may also include relay stations.
  • a relay station is a station that receives a transmission of data and/or other information from an upstream station (e.g., a BS or a UE) and sends a transmission of the data and/or other information to a downstream station (e.g., a UE or a BS) .
  • a relay station may also be a UE that relays transmissions for other UEs.
  • a relay station 110r may communicate with the BS 110a and a UE 120r in order to facilitate communication between the BS 110a and the UE 120r.
  • a relay station may also be referred to as a relay BS, a relay, etc.
  • Wireless network 100 may be a heterogeneous network that includes BSs of different types, e.g., macro BS, pico BS, femto BS, relays, etc. These different types of BSs may have different transmit power levels, different coverage areas, and different impact on interference in the wireless network 100.
  • macro BS may have a high transmit power level (e.g., 20 Watts) whereas pico BS, femto BS, and relays may have a lower transmit power level (e.g., 1 Watt) .
  • Wireless communication network 100 may support synchronous or asynchronous operation.
  • the BSs may have similar frame timing, and transmissions from different BSs may be approximately aligned in time.
  • the BSs may have different frame timing, and transmissions from different BSs may not be aligned in time.
  • the techniques described herein may be used for both synchronous and asynchronous operation.
  • a network controller 130 may couple to a set of BSs and provide coordination and control for these BSs.
  • the network controller 130 may communicate with the BSs 110 via a backhaul.
  • the BSs 110 may also communicate with one another (e.g., directly or indirectly) via wireless or wireline backhaul.
  • the UEs 120 may be dispersed throughout the wireless network 100, and each UE may be stationary or mobile.
  • 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
  • Certain wireless networks utilize orthogonal frequency division multiplexing (OFDM) on the downlink and single-carrier frequency division multiplexing (SC-FDM) on the uplink.
  • OFDM and SC-FDM partition the system bandwidth into multiple (K) orthogonal subcarriers, which are also commonly referred to as tones, bins, etc.
  • K orthogonal subcarriers
  • Each subcarrier may be modulated with data.
  • modulation symbols are 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 (K) may be dependent on the system bandwidth.
  • the spacing of the subcarriers may be 15 kHz and the minimum resource allocation (called a “resource block” (RB) ) may be 12 subcarriers (or 180 kHz) . Consequently, the nominal Fast Fourier Transfer (FFT) size may be equal to 128, 256, 512, 1024 or 2048 for system bandwidth of 1.25, 2.5, 5, 10, or 20 megahertz (MHz) , respectively.
  • the system bandwidth may also be partitioned into subbands. For example, a subband may cover 1.08 MHz (i.e., 6 resource blocks) , and there may be 1, 2, 4, 8, or 16 subbands for system bandwidth of 1.25, 2.5, 5, 10 or 20 MHz, respectively.
  • NR may utilize OFDM with a CP on the uplink and downlink and include support for half-duplex operation using TDD. Beamforming may be supported 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.
  • a scheduling entity e.g., a base station
  • 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.
  • a solid line with double arrows indicates desired transmissions between a UE and a serving BS, which is a BS designated to serve the UE on the downlink and/or uplink.
  • a finely dashed line with double arrows indicates interfering transmissions between a UE and a BS.
  • FIG. 2 illustrates an example logical architecture of a distributed Radio Access Network (RAN) 200, which may be implemented in the wireless communication network 100 illustrated in FIG. 1.
  • a 5G access node 206 may include an access node controller (ANC) 202.
  • ANC 202 may be a central unit (CU) of the distributed RAN 200.
  • the backhaul interface to the Next Generation Core Network (NG-CN) 204 may terminate at ANC 202.
  • the backhaul interface to neighboring next generation access Nodes (NG-ANs) 210 may terminate at ANC 202.
  • ANC 202 may include one or more transmission reception points (TRPs) 208 (e.g., cells, BSs, gNBs, etc. ) .
  • TRPs transmission reception points
  • the TRPs 208 may be a distributed unit (DU) .
  • TRPs 208 may be connected to a single ANC (e.g., ANC 202) or more than one ANC (not illustrated) .
  • a single ANC e.g., ANC 202
  • ANC e.g., ANC 202
  • RaaS radio as a service
  • TRPs 208 may be connected to more than one ANC.
  • TRPs 208 may each include one or more antenna ports.
  • TRPs 208 may be configured to individually (e.g., dynamic selection) or jointly (e.g., joint transmission) serve traffic to a UE.
  • the logical architecture of distributed RAN 200 may support fronthauling solutions across different deployment types.
  • the logical architecture may be based on transmit network capabilities (e.g., bandwidth, latency, and/or jitter) .
  • next generation access node (NG-AN) 210 may support dual connectivity with NR and may share a common fronthaul for LTE and NR.
  • NG-AN next generation access node
  • the logical architecture of distributed RAN 200 may enable cooperation between and among TRPs 208, for example, within a TRP and/or across TRPs via ANC 202.
  • An inter-TRP interface may not be used.
  • Logical functions may be dynamically distributed in the logical architecture of distributed RAN 200.
  • the Radio Resource Control (RRC) layer, Packet Data Convergence Protocol (PDCP) layer, Radio Link Control (RLC) layer, Medium Access Control (MAC) layer, and a Physical (PHY) layers may be adaptably placed at the DU (e.g., TRP 208) or CU (e.g., ANC 202) .
  • RRC Radio Resource Control
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access Control
  • PHY Physical
  • FIG. 3 illustrates an example physical architecture of a distributed Radio Access Network (RAN) 300, according to aspects of the present disclosure.
  • a centralized core network unit (C-CU) 302 may host core network functions.
  • C-CU 302 may be centrally deployed.
  • C-CU 302 functionality may be offloaded (e.g., to advanced wireless services (AWS) ) , in an effort to handle peak capacity.
  • AWS advanced wireless services
  • a centralized RAN unit (C-RU) 304 may host one or more ANC functions.
  • the C-RU 304 may host core network functions locally.
  • the C-RU 304 may have distributed deployment.
  • the C-RU 304 may be close to the network edge.
  • a DU 306 may host one or more TRPs (Edge Node (EN) , an Edge Unit (EU) , a Radio Head (RH) , a Smart Radio Head (SRH) , or the like) .
  • the DU may be located at edges of the network with radio frequency (RF) functionality.
  • RF radio frequency
  • FIG. 4 illustrates example components of BS 110 and UE 120 (as depicted in FIG. 1) , which may be used to implement aspects of the present disclosure.
  • antennas 452, processors 466, 458, 464, and/or controller/processor 480 of the UE 120 and/or antennas 434, processors 420, 430, 438, and/or controller/processor 440 of the BS 110 may be used to perform the various techniques and methods described herein. For example, they may be used to perform the methods for enhanced measurement described below with respect to FIGS. 7-12.
  • a transmit processor 420 may receive data from a data source 412 and control information from a controller/processor 440.
  • 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.
  • the processor 420 may process (e.g., encode and symbol map) the data and control information to obtain data symbols and control symbols, respectively.
  • the processor 420 may also generate reference symbols, e.g., for the primary synchronization signal (PSS) , secondary synchronization signal (SSS) , and cell-specific reference signal (CRS) .
  • a transmit (TX) multiple-input multiple-output (MIMO) processor 430 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) 432a through 432t. Each modulator 432 may process a respective output symbol stream (e.g., for OFDM, etc. ) to obtain an output sample stream.
  • 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 432a through 432t may be transmitted via the antennas 434a through 434t, respectively.
  • the antennas 452a through 452r may receive the downlink signals from the base station 110 and may provide received signals to the demodulators (DEMODs) in transceivers 454a through 454r, respectively.
  • Each demodulator 454 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 456 may obtain received symbols from all the demodulators 454a through 454r, perform MIMO detection on the received symbols if applicable, and provide detected symbols.
  • a receive processor 458 may process (e.g., demodulate, deinterleave, and decode) the detected symbols, provide decoded data for the UE 120 to a data sink 460, and provide decoded control information to a controller/processor 480.
  • a transmit processor 464 may receive and process data (e.g., for the physical uplink shared channel (PUSCH) ) from a data source 462 and control information (e.g., for the physical uplink control channel (PUCCH) from the controller/processor 480.
  • the transmit processor 464 may also generate reference symbols for a reference signal (e.g., for the sounding reference signal (SRS) ) .
  • the symbols from the transmit processor 464 may be precoded by a TX MIMO processor 466 if applicable, further processed by the demodulators in transceivers 454a through 454r (e.g., for SC-FDM, etc. ) , and transmitted to the base station 110.
  • data e.g., for the physical uplink shared channel (PUSCH)
  • control information e.g., for the physical uplink control channel (PUCCH) from the controller/processor 480.
  • the transmit processor 464 may also generate reference symbols for a reference signal (e.g., for the
  • the uplink signals from the UE 120 may be received by the antennas 434, processed by the modulators 432, detected by a MIMO detector 436 if applicable, and further processed by a receive processor 438 to obtain decoded data and control information sent by the UE 120.
  • the receive processor 438 may provide the decoded data to a data sink 439 and the decoded control information to the controller/processor 440.
  • the controllers/processors 440 and 480 may direct the operation at the base station 110 and the UE 120, respectively.
  • the processor 440 and/or other processors and modules at the BS 110 may perform or direct the execution of processes for the techniques described herein.
  • the memories 442 and 482 may store data and program codes for BS 110 and UE 120, respectively.
  • a scheduler 444 may schedule UEs for data transmission on the downlink and/or uplink.
  • FIG. 5 illustrates a diagram 500 showing examples for implementing a communications protocol stack, according to aspects of the present disclosure.
  • the illustrated communications protocol stacks may be implemented by devices operating in a wireless communication system, such as a 5G system (e.g., a system that supports uplink-based mobility) .
  • Diagram 500 illustrates a communications protocol stack including a Radio Resource Control (RRC) layer 510, a Packet Data Convergence Protocol (PDCP) layer 515, a Radio Link Control (RLC) layer 520, a Medium Access Control (MAC) layer 525, and a Physical (PHY) layer 530.
  • RRC Radio Resource Control
  • PDCP Packet Data Convergence Protocol
  • RLC Radio Link Control
  • MAC Medium Access Control
  • PHY Physical
  • the layers of a protocol stack may be implemented as separate modules of software, portions of a processor or ASIC, portions of non-collocated devices connected by a communications link, or various combinations thereof. Collocated and non-collocated implementations may be used, for example, in a protocol stack for a network access device (e.g., ANs, CUs, and/or DUs) or a UE.
  • a network access device e.g., ANs, CUs, and/or DUs
  • a first option 505-a shows a split implementation of a protocol stack, in which implementation of the protocol stack is split between a centralized network access device (e.g., an ANC 202 in FIG. 2) and distributed network access device (e.g., DU 208 in FIG. 2) .
  • a centralized network access device e.g., an ANC 202 in FIG. 2
  • distributed network access device e.g., DU 208 in FIG. 2
  • an RRC layer 510 and a PDCP layer 515 may be implemented by the central unit
  • an RLC layer 520, a MAC layer 525, and a PHY layer 530 may be implemented by the DU.
  • the CU and the DU may be collocated or non-collocated.
  • the first option 505-a may be useful in a macro cell, micro cell, or pico cell deployment.
  • a second option 505-b shows a unified implementation of a protocol stack, in which the protocol stack is implemented in a single network access device.
  • RRC layer 510, PDCP layer 515, RLC layer 520, MAC layer 525, and PHY layer 530 may each be implemented by the AN.
  • the second option 505-b may be useful in, for example, a femto cell deployment.
  • a UE may implement an entire protocol stack as shown in 505-c (e.g., the RRC layer 510, the PDCP layer 515, the RLC layer 520, the MAC layer 525, and the PHY layer 530) .
  • the basic transmission time interval (TTI) or packet duration is the 1 ms subframe.
  • a subframe is still 1 ms, but the basic TTI is referred to as a slot.
  • a subframe contains a variable number of slots (e.g., 1, 2, 4, 8, 16, ...slots) depending on the subcarrier spacing.
  • the NR RB is 12 consecutive frequency subcarriers.
  • NR may support a base subcarrier spacing of 15 KHz and other subcarrier spacing may be defined with respect to the base subcarrier spacing, for example, 30 kHz, 60 kHz, 120 kHz, 240 kHz, etc.
  • the symbol and slot lengths scale with the subcarrier spacing.
  • the CP length also depends on the subcarrier spacing.
  • FIG. 6 is a diagram showing an example of a frame format 600 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 depending on the subcarrier spacing.
  • Each slot may include a variable number of symbol periods (e.g., 7 or 14 symbols) depending on the subcarrier spacing.
  • 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 synchronization signal (SS) block is transmitted.
  • the SS block includes a PSS, a SSS, and a two symbol PBCH.
  • the SS block can be transmitted in a fixed slot location, such as the symbols 0-3 as shown in FIG. 6.
  • the PSS and SSS may be used by UEs for cell search and acquisition.
  • the PSS may provide half-frame timing, the SS may provide the CP length and frame timing.
  • the PSS and SSS may provide the cell identity.
  • the PBCH carries some basic system information, such as downlink system bandwidth, timing information within radio frame, SS burst set periodicity, system frame number, etc.
  • the SS blocks may be organized into SS bursts to support beam sweeping.
  • Further system information such as, remaining minimum system information (RMSI) , system information blocks (SIBs) , other system information (OSI) can be transmitted on a physical downlink shared channel (PDSCH) in certain subframes.
  • the SS block may be transmitted up to sixty-four times, for example, with up to sixty-four different beam directions for mmW.
  • the up to sixty-four transmissions of the SS block are referred to as the SS burst set.
  • two or more subordinate entities may communicate with each other using sidelink signals.
  • Real-world applications of such sidelink communications may include public safety, proximity services, UE-to-network relaying, vehicle-to-vehicle (V2V) communications, Internet of Everything (IoE) communications, IoT communications, mission-critical mesh, and/or various other suitable applications.
  • a sidelink signal may refer to a signal communicated from one subordinate entity (e.g., UE1) to another subordinate entity (e.g., UE2) without relaying that communication through the scheduling entity (e.g., UE or BS) , even though the scheduling entity may be utilized for scheduling and/or control purposes.
  • the sidelink signals may be communicated using a licensed spectrum (unlike wireless local area networks, which typically use an unlicensed spectrum) .
  • a UE may operate in various radio resource configurations, including a configuration associated with transmitting pilots using a dedicated set of resources (e.g., a radio resource control (RRC) dedicated state, etc. ) or a configuration associated with transmitting pilots using a common set of resources (e.g., an RRC common state, etc. ) .
  • RRC radio resource control
  • the UE may select a dedicated set of resources for transmitting a pilot signal to a network.
  • the UE may select a common set of resources for transmitting a pilot signal to the network.
  • a pilot signal transmitted by the UE may be received by one or more network access devices, such as an AN, or a DU, or portions thereof.
  • Each receiving network access device may be configured to receive and measure pilot signals transmitted on the common set of resources, and also receive and measure pilot signals transmitted on dedicated sets of resources allocated to the UEs for which the network access device is a member of a monitoring set of network access devices for the UE.
  • One or more of the receiving network access devices, or a CU to which receiving network access device (s) transmit the measurements of the pilot signals may use the measurements to identify serving cells for the UEs, or to initiate a change of serving cell for one or more of the UEs.
  • a UE When a UE exits an idle or inactive state, it may perform a procedure to reestablish a data connection with the network. In some cases, a long radio resource control (RRC) configuration latency may be observed when performing this procedure. For example, in some cases, an idle UE may take around 237 ms to be configured for data transmission after exiting the idle state. Similarly, an inactive UE may take around 213 ms to be configured for data transmissions after exiting the inactive state (which is slightly faster owing to not needing to perform security mode command (SMC) procedures when exiting the inactive state) . Reduction of these latencies is beneficial for performance of the UE.
  • RRC radio resource control
  • the enhanced synchronization signal measurement methods discussed herein beneficially avoid long measurement durations, which in-turn reduces the time a UE must keep its radio on thereby reducing thermal power consumption. Further, the methods discussed herein support handover with low latency service (e.g. for ultra-reliable low latency communication (URLLC) ) . The method discussed herein further support fast carrier aggregation and dual connectivity activation.
  • low latency service e.g. for ultra-reliable low latency communication (URLLC)
  • URLLC ultra-reliable low latency communication
  • UEs can receive measurement configurations in RRC release messages or system information broadcast (SIB) messages, which allows the UE to perform measurements in an idle or inactive state.
  • SIB system information broadcast
  • other NR-specific features can be utilized to further reduce latency of the RRC configuration procedure after existing the idle or inactive state.
  • on-demand enhanced measurement methods may beneficially reduce the latency of the RRC configuration procedure so that UEs may receive data via NR networks more quickly after exiting an idle or inactive state.
  • NR networks support at least two types of references signals, including synchronization signal blocks (SSB) and channel state information reference signals (CSI-RS) , to perform radio resource management (RRM) .
  • SSB synchronization signal blocks
  • CSI-RS channel state information reference signals
  • RRM radio resource management
  • one synchronization signal block includes one symbol of a primary synchronization signal, one symbol of a secondary synchronization signal, and two or more symbols of a physical broadcast channel that are time division multiplexed.
  • the transmission of synchronization signal blocks within a synchronization signal burst set is confined to a 5 ms window regardless of synchronization signal burst set periodicity.
  • SSB-based measurement timing configuration includes a network configuring a SMTC window duration (e.g., 1, 2, 3, 4, or 5 ms) , a SMTC window timing offset (e.g., 0, 1, ..., SMTC periodicity-1 ms) , and an SMTC periodicity (e.g., 5, 10, 20, 40, 80, 160 ms) .
  • a SMTC window duration e.g., 1, 2, 3, 4, or 5 ms
  • a SMTC window timing offset e.g., 0, 1, ..., SMTC periodicity-1 ms
  • an SMTC periodicity e.g., 5, 10, 20, 40, 80, 160 ms
  • CSI-RS based RRM In CSI-RS based RRM, a UE-specific CSI-RS is used for L3 mobility, and no cell specific CSI-RS need be specified.
  • CSI-RS for L3 mobility is based on periodic CSI-RS.
  • the enhanced synchronization signal measurement methods discussed herein generally include configuring one basic RRM resource and some additional RRM resources in a single synchronization signal block (e.g., a block within a single time slot of a synchronization signal burst set) .
  • the additional RRM resources in a measurement object are explicitly configured.
  • the additional RRM resources may be implicitly configured (e.g., via quasi-colocation configuration) .
  • an SSB may include a basic beam as a basic RRM resource and quasi-collocated CSI-RS resources as additional RRM resources. Collectively these may be referred to as an enhanced SSB.
  • a UE performing the enhanced synchronization signal measurement methods discussed herein may be configured to measure the basic RRM resource and optionally to measure the additional RRM resources based on, for example, an explicit network indication (e.g., via downlink control information (DCI) message or medium access control-control element (MAC-CE) ) .
  • DCI downlink control information
  • MAC-CE medium access control-control element
  • the configuration of the basic RRM resource can be via explicit SMTC configuration in a measurement object.
  • the configuration of additional RRM resources can be via explicit configuration in the measurement object.
  • the additional RRM resources can be SSB or CSI-RS resources. If CSI-RS resources are configured, the offset of SSB based measurement and CSI-RS based measurement can be indicated in the measurement object to consolidate the measurement results.
  • the offset may be measured in one or more of time, frequency, or power (i.e., including combinations thereof) .
  • the additional RRM resources can be refined beams for the basic RRM resource. For example, they can be beams with similar directionality as to the basic RRM resource beam (e.g., having an angular difference less than a set threshold) .
  • the additional RRM resources can also be different beams from the basic RRM resource. For example, the different beams may have different directionality (e.g., having an angular difference greater than a set threshold) .
  • the additional RRM resources may be implicitly configured via quasi co-location (QCL) configuration in a measurement object.
  • QCL quasi co-location
  • quasi co-location may be configured between the basic RRM resource and the additional RRM resources with the same measurement quantities.
  • the network may provide an explicit indication of enhanced measurement based on a request from the UE for enhanced measurement activation.
  • the network ensures that the additional beams (RRM resources) are transmitted before sending an activation indication.
  • the UE may make implicit measurements of the additional RRM resources.
  • some inter-gNB coordination may be required if the UE is configured to measure neighbor cells.
  • the additional RRM resources can also be always-on (e.g. SSB) without need of coordination.
  • the network may and turn off the associated enhanced reference signals to save power and improve carrier utilization. Because the enhanced measurement methods may be activated and deactivated by the network, they may be referred to as “on-demand” measurement methods.
  • FIG. 7 depicts an example RRM resource configuration 700.
  • a first SSB burst set 708 and a second SSB burst set 710 each include four individual SSBs (indexed at time slots 0-3, respectively) .
  • Each of the individual SSBs includes a basic SSB beam (e.g., B1, B2, B3, and B4) , which collectively form basic RRM resource sets 702 and 714.
  • each SSB may be configured with additional beams as additional or enhanced RRM resources.
  • SSB burst set 708 may be configured to include additional beams 704 associated with the individual SSBs in the burst set.
  • SSB beam B1 (abasic RRM resource) is configured in the first SSB (at time slot 0) of SSB burst set 708.
  • Additional RRM resources are likewise configured in the first SSB (at time slot 0) of SSB burst set 708, including additional beams B1-1, B1-2, and B1-3 (additional RRM resources) .
  • the additional beams have different frequencies than the basic beam.
  • each of the additional beams (B1-1, B1-2, and B1-3) is a refining beam based on B1, and thus each of beams B1-1, B1-2, and B1-3 has a directionality or angle similar to B1.
  • beams B1 and beams B1-1, B1-2, and B1-3 may be described as having coarse spatial similarity.
  • each of beams B1-1, B1-2, and B1-3 may be within a threshold angle of B1, which may be important for UEs with limited numbers of antenna panels.
  • the refining beams B1-1, B1-2, and B1-3 are configured to improve the measurement accuracy of a UE receiving the beams.
  • the additional beams allow a UE to satisfy RRM requirements in a single SSB burst set, rather than needing multiple SSB burst sets. Consequently, the network can configure the UE to go into a lower power state during subsequent transmissions of SSB burst sets.
  • the network has configured the UE to cease discontinuous reception (DRX) 716 after receiving the first SSB burst set 708, which allows the UE to save power by entering, for example, a sleep state during the transmission of second SSB burst set 710.
  • DRX discontinuous reception
  • the UE need only be actively receiving the beams for the four time slots of first SSB burst set 708, and not the four time slots of second SSB burst set 710.
  • conventional measurement techniques would require the UE to be awake and receiving both SSB burst sets (here 708 and 710) in order to meet RRM requirements, which causes additional power draw by the UE (e.g., by having the radio and associated circuitry active for longer periods of time) .
  • the additional beams may be SSB or CSI-RS type beams. In some implementations, it is preferable to use CSI-RS beams as the additional RRM resources associated with an SSB.
  • the network in addition to configuring the UE to go into a low power sleep during a subsequent SSB burst set, the network may deactivate and not transmit the additional beams in the subsequent SSB burst set. This may save network overhead, thereby improving overall network performance.
  • FIG. 8 depicts another example RRM resource configuration 800.
  • a first SSB burst set 808 and a second SSB burst set 810 each include four individual SSBs (indexed at time slots 0-3, respectively) .
  • Each of the individual SSBs includes a basic SSB beam (e.g., B1, B2, B3, and B4) , which collectively form basic RRM resource sets 802 and 814.
  • an SSB may be configured with additional beams as additional RRM resources.
  • the additional resources may be configured for a subset of the SSBs in an SSB burst set (e.g., 808 and 810) .
  • the first SSB (time slot 0) of SSB burst set 808 is configured to include additional beams 804, but additional beams are not configured for the SSBs at time slots 1, 2, or 3 of burst set 808.
  • the first SSB (time slot 0) of SSB burst set 810 is configured to include additional beams 812, but additional beams are not configured for the SSBs at time slots 1, 2, or 3 of burst set 810.
  • the additional beams (e.g., 804 and 812) configured in a particular SSB (e.g., the SSB at time slot 0 in SSB burst set 808) correspond with the basic beams in other time slots.
  • additional beam B1-1 corresponds to B2 in SSB time slot 1 of SSB burst set 808.
  • additional beam B1-2 corresponds to B3 in SSB time slot 2 of SSB burst set 808.
  • additional beam B1-3 corresponds to B4 in SSB time slot 3 of SSB burst set 808.
  • the additional beams can be configured explicitly or implicitly via quasi co-location (QCL) .
  • beam B1-1 may be quasi co-located with B2.
  • a UE would need multiple antenna panels in order to receive the basic beam and the additional beams (e.g., in time slot 0 of SSB burst set 808) because each of the beams is dissimilar in direction.
  • each of beams B1, B1-1, B1-2, and B1-3 may have angular differences greater than a threshold, such as the threshold described above with respect to FIG. 7.
  • the network can configure the UE to go into a lower power state during transmission of standard RRM resources. But unlike in FIG. 7, here the network configures the UE to cease discontinuous reception (DRX) 716 after receiving the first SSB (time slot 0) in SSB burst set 808 and then again after receiving the first SSB, (time slot 0) in SSB burst set 810. Thus, here the UE need only be actively receiving the beams for the first time slot of first SSB burst set 808 and the first time slot of second SSB burst set 810 (i.e., two time slots in total) .
  • DRX discontinuous reception
  • the additional beams such as B1-1, B1-2, and B1-3, may be SSB or CSI-RS type beams.
  • the network may deactivate and not transmit additional beams in certain time slots of an SSB burst set, such as time slots 1, 2, and 3 of SSB burst sets 808 and 810 in this example. This may save network overhead, thereby improving overall network performance.
  • FIG. 9 depicts an example method 900 for performing enhanced signal measurement in a user equipment.
  • Method 900 begins at step 902 with receiving an indication to perform enhanced measurement of synchronization signals.
  • the indication may be received via a network, such as an NR network.
  • the indication is received via one of: a downlink control information (DCI) message on a downlink channel, a medium access control-control element (MAC-CE) on a downlink channel, or a radio resource control (RRC) message on a downlink channel.
  • DCI downlink control information
  • MAC-CE medium access control-control element
  • RRC radio resource control
  • the indication to perform enhanced measurement may comprise a single bit in a RRC resume message.
  • Method 900 then proceeds to step 904 with measuring, within a first synchronization signal block (SSB) of a first SSB burst set: a basic SSB beam; and one or more additional beams, wherein each of the one or more additional beams has a frequency different than the basic SSB beam.
  • SSB synchronization signal block
  • each of the one or more additional beams has an angle relative to the basic SSB beam less than a threshold angle, such as in the example described above with respect to FIG. 7. In other implementations, each of the one or more additional beams has an angle relative to the basic SSB beam greater than a threshold angle, such as described above with respect to FIG. 8. In such an implementation, the user equipment receiving the beams may comprises more than one antenna panel.
  • Method 900 then proceeds to step 906 with transmitting, to the network, an enhanced measurement report based on measurements of the basic SSB beam and the one or more additional beams.
  • method 900 may further include receiving, from the network, a configuration message configured to cause the user equipment to enter a reduced power mode during a network transmission of a second SSB burst set; and entering the reduced power mode during the network transmission of the second SSB burst set.
  • method 900 may further include receiving, from the network, a configuration message configured to cause the user equipment to enter a reduced power mode during a network transmission of a second SSB block within the first SSB block set; and entering the reduced power mode during the network transmission of the second SSB block within the first SSB block set.
  • each of the one or more additional beams corresponds to a basic SSB beam configured to be transmitted by the network in an SSB within the first SSB burst set other than the first SSB.
  • each of the one or more additional beams comprises a CSI-RS beam.
  • method 900 may further include receiving, from the network, an offset configuration based on an offset between the basic SSB beam and the one or more additional beams.
  • the offset configuration may comprise one or more of: a time offset, a frequency offset, or a power offset.
  • each of the one or more additional beams comprises a SSB beam.
  • method 900 may further include receiving, from the network, an offset value based on an offset between the basic SSB beam and the one or more additional beams.
  • the offset configuration comprises one or more of: a time offset, a frequency offset, or a power offset.
  • method 900 may further include transmitting, from the user equipment to the network, a request to perform enhanced measurement via at least one of: a physical uplink control channel (PUCCH) , a medium access control-control element (MAC-CE) on an uplink channel, or a radio resource control (RRC) message on an uplink channel.
  • PUCCH physical uplink control channel
  • MAC-CE medium access control-control element
  • RRC radio resource control
  • transmitting, from the user equipment to the network, the request to perform enhanced measurement is in response to a measurement event trigger at the user equipment, such as those defined in 3GPP specification TR38.331.
  • method 900 may further include receiving, from the network, a configuration for the one or more additional beams via quasi co-location (QCL) .
  • QCL quasi co-location
  • method 900 may further include receiving, from the network, an indication to discontinue enhanced measurement; and ceasing performing enhanced measurement.
  • FIG. 10 depicts an example method 1000 for performing enhanced signal measurement in a network.
  • Method 1000 begins at step 1002 with transmitting, to a user equipment, an indication to perform enhanced measurement of synchronization signals.
  • the indication is transmitted via one of: a downlink control information (DCI) message on a downlink channel, a medium access control-control element (MAC-CE) on a downlink channel, or a radio resource control message (RRC) on a downlink channel.
  • DCI downlink control information
  • MAC-CE medium access control-control element
  • RRC radio resource control message
  • the indication to perform enhanced measurement may comprise a single bit in a radio resource control (RRC) resume message.
  • RRC radio resource control
  • the network ensures that additional beams resources are transmitted before sending the indication.
  • Method 1000 then proceeds to step 1004 with transmitting, to the user equipment, within a first synchronization signal block (SSB) : of a first SSB burst set: a basic SSB beam; and one or more additional beams, wherein each of the one or more additional beams has a frequency different than the basic SSB beam.
  • SSB synchronization signal block
  • each of the one or more additional beams has an angle relative to the basic SSB beam less than a threshold angle, such as described above with respect to FIG. 7. In other implementations, each of the one or more additional beams has an angle relative to the basic SSB beam greater than a threshold angle, such as described above with respect to FIG. 8.
  • each of the one or more additional beams may corresponds to a basic SSB beam configured to be transmitted in an SSB within the first SSB burst set other than the first SSB.
  • each of the one or more additional beams comprises a CSI-RS beam.
  • method 1000 may further include transmitting, to the user equipment, an offset configuration based on an offset between the basic SSB beam and the one or more additional beams.
  • the offset configuration may comprise one or more of: a time offset, a frequency offset, or a power offset.
  • each of the one or more additional beams comprises a SSB beam.
  • method 1000 may further include transmitting, to the user equipment, an offset value based on an offset between the basic SSB beam and the one or more additional beams.
  • the offset configuration may comprise one or more of: a time offset, a frequency offset, or a power offset.
  • Method 1000 then proceeds to step 1006 with receiving, from the user equipment, an enhanced measurement report based on measurements of the basic SSB beam and the one or more additional beams.
  • method 1000 may further include transmitting, to the user equipment, a configuration message configured to cause the user equipment to enter a reduced power mode during transmission of a second SSB burst set. In other implementations, method 1000 may further include transmitting, to the user equipment, a configuration message configured to cause the user equipment to enter a reduced power mode during a transmission of a second SSB block within the first SSB block set.
  • method 1000 further includes receiving, from the user equipment, a request to perform enhanced measurement via at least one of: a physical uplink control channel (PUCCH) , a medium access control-control element (MAC-CE) on an uplink channel, or a radio resource control (RRC) message on an uplink channel.
  • PUCCH physical uplink control channel
  • MAC-CE medium access control-control element
  • RRC radio resource control
  • method 1000 further includes configuring the one or more additional beams via quasi co-location (QCL) .
  • QCL quasi co-location
  • method 1000 further includes transmitting, to the user equipment, an indication to discontinue enhanced measurement; deactivating the one or more additional beams; and ceasing transmitting the one or more additional beams.
  • FIG. 11 depicts another example RRM resource configuration 1100.
  • each SSB of SSB burst set 1104 is configured with a basic beam (RRM resource) , and each of the basic beams can be referred to collectively as a basic RRM resource set 1102.
  • each SSB of SSB burst set 1104 is configured to be associated with one or more CSI-RS resources in the same time slot, but at different frequency locations.
  • each SSB can be associated with a group of CSI-RSs with a fixed pattern.
  • FIG. 12 depicts an example message flow 1200 for on-demand enhanced measurements.
  • Flow 1200 begins at step 1202 with a last serving master node (MN) transmitting an RRC release message to a user equipment.
  • the RRC release message may include measurement configurations for secondary node (SN) frequencies.
  • the UE goes inactive, but does not perform any measurements for SN frequencies.
  • the UE leaves the inactive state and initiates a data connection with the network.
  • the UE transmits an RRC resume request (message 3) to the last serving MN.
  • the network knows that the UE supports on-demand enhanced measurements based on the resume ID.
  • the network includes an indication to perform enhanced measurement of synchronization signals, as discussed above with respect to FIGS. 7-11.
  • the indication may be a single bit activating the enhanced measurement procedure.
  • the UE Based on the activation at step 1210, between steps 1210 and 1212 the UE performs the enhanced measurement procedure, as discussed above with respect to FIGS. 7-11. Then at step 1212, the UE provides the measurements by way of a measurement report in an RRC resume complete message (message 5) . At this point, the last serving MN may deactivate the enhanced measurement procedure and stop transmitting the additional RRM resources, such as the additional beams discussed above.
  • the UE then proceeds with a conventional messaging protocol to initiate the data connection with the MN and SN in steps 1214-1226.
  • FIG. 13 illustrates a communications device 1300 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 FIGS. 7-12.
  • the communications device 1300 includes a processing system 1302 coupled to a transceiver 1308.
  • the transceiver 1308 is configured to transmit and receive signals for the communications device 1300 via an antenna 1310, such as the various signal described herein.
  • antenna 1310 such as the various signal described herein.
  • transceiver 1308 may be representative of an individual receiver and an individual transmitter.
  • the processing system 1302 may be configured to perform processing functions for the communications device 1300, including processing signals received and/or to be transmitted by the communications device 1300.
  • the processing system 1302 includes a processor 1304 coupled to a computer-readable medium/memory 1312 via a bus 1306.
  • the computer-readable medium/memory 1312 is configured to store instructions that when executed by processor 1304, cause the processor 1304 to perform the operations illustrated in FIGS. 7-12, or other operations for performing the various techniques discussed herein.
  • the processing system 1302 further includes a receiving component 1314 for performing the operations illustrated in FIGS. 7-12. Additionally, the processing system 1302 includes a measuring component 1316 for performing the operations illustrated in FIGS. 7-12. Additionally, the processing system 1302 includes a transmitting component 1318 for performing the operations illustrated in FIGS. 7-12.
  • the receiving component 1314, and transmitting component 1318 may be coupled to the processor 1304 via bus 1306. In certain aspects, the receiving component 1314, measuring component 1316, and transmitting component 1318 may be hardware circuits. In certain aspects, the receiving component 1314, measuring component 1316, and transmitting component 1318 may be software components that are executed and run on processor 1304.
  • 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.
  • instructions for performing the operations described herein and illustrated in FIGS. 7-12 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.
  • FIGS. 7-12 instructions for performing the operations described herein and illustrated in FIGS. 7-12.
  • 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)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

Certains aspects de la présente invention concernent des techniques permettant de réaliser une gestion de signaux améliorée. Dans un exemple, un procédé selon l'invention consiste : à recevoir, en provenance d'un réseau, une indication permettant d'effectuer une mesure améliorée de signaux de synchronisation ; à mesurer, dans un premier bloc de signaux de synchronisation (SSB) d'un premier ensemble de rafales SSB : un faisceau SSB de base et au moins un faisceau supplémentaire, chacun des faisceaux supplémentaires présentant une fréquence différente de celle du faisceau SSB de base ; et à transmettre au réseau un rapport de mesures améliorées, en fonction des mesures du faisceau SSB de base et dudit faisceau supplémentaire au moins.
PCT/CN2020/072433 2019-01-17 2020-01-16 Mesures à la demande WO2020147779A1 (fr)

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