WO2024035916A1 - Procédé et appareil de ressource prach et de suivi d'adaptation de signal de référence dans communication sans fil - Google Patents

Procédé et appareil de ressource prach et de suivi d'adaptation de signal de référence dans communication sans fil Download PDF

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Publication number
WO2024035916A1
WO2024035916A1 PCT/US2023/030047 US2023030047W WO2024035916A1 WO 2024035916 A1 WO2024035916 A1 WO 2024035916A1 US 2023030047 W US2023030047 W US 2023030047W WO 2024035916 A1 WO2024035916 A1 WO 2024035916A1
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WO
WIPO (PCT)
Prior art keywords
prach
dci
base station
power saving
configurations
Prior art date
Application number
PCT/US2023/030047
Other languages
English (en)
Inventor
Hong He
Dawei Zhang
Wei Zeng
Huaning Niu
Chunhai Yao
Ankit Bhamri
Jie Cui
Original Assignee
Apple Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Apple Inc. filed Critical Apple Inc.
Publication of WO2024035916A1 publication Critical patent/WO2024035916A1/fr

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • 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
    • H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0235—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal where the received signal is a power saving command
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0245—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal according to signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/08—Non-scheduled access, e.g. ALOHA
    • H04W74/0833—Random access procedures, e.g. with 4-step access
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal

Definitions

  • Some exemplary embodiments are related to an apparatus of a user equipment (UE ) , the apparatus having processing circuitry configured to decode , based on signaling received from a base station, a system information block ( S IB ) comprising a set of physical random access channel ( PRACH) configurations for when the base station is to utilize a power saving mode and determine one of the PRACH configurations from the set of PRACH configurations is to be utili zed for a random access channel (RACH) procedure .
  • S IB system information block
  • PRACH physical random access channel
  • exemplary embodiments are related to a processor configured to decode , based on signaling received from a base station, a system information block ( SIB ) comprising a set of physical random access channel (BRACK) configurations for when the base station is to utili ze a power saving mode and determine one of the BRACH configurations from the set of BRACH configurations is to be utili zed for a random access channel (RACK) procedure .
  • SIB system information block
  • BRACK physical random access channel
  • Still further exemplary embodiments are related to an apparatus of a base station, the apparatus having processing circuitry configured to configure transceiver circuitry to transmit a system information block ( SIB ) comprising a set of physical random access channel (BRACH) configurations for when the base station is to utili ze a power saving mode and configure transceiver circuitry to transmit downlink control information ( DCI ) to a user equipment (UE ) , the DCI indicating one BRACH configuration from the set of BRACH configurations is to be utilized for a random access channel (RACH) procedure .
  • SIB system information block
  • BRACH physical random access channel
  • Additional exemplary embodiments are related to a processor configured to configure transceiver circuitry to transmit a system information block ( SIB ) comprising a set of physical random access channel (BRACH) configurations for when the base station is to utili ze a power saving mode and configure transceiver circuitry to transmit downlink control information ( DCI ) to a user equipment (UE ) , the DCI indicating one BRACH configuration from the set of BRACH configurations is to be utilized for a random access channel (RACH) procedure .
  • SIB system information block
  • BRACH physical random access channel
  • Exemplary embodiments are also related to an apparatus of a user equipment (UE ) , the apparatus having processing circuitry configured to decode , from signaling received from a base station, a signal comprising multiple tracking reference signal ( TRS ) resource sets for when the base station is to utilize a power saving mode and decode, from signaling received from the base station, downlink control information ( DCI ) indicating whether zero or more of the multiple TRS resources sets are to be activated for the power saving mode .
  • TRS tracking reference signal
  • DCI downlink control information
  • More exemplary embodiments are related to a processor configured to decode , from signaling received from a base station, a signal comprising multiple tracking reference signal ( TRS ) resource sets for when the base station is to utili ze a power saving mode and decode , from signaling received from the base station, downlink control information (DCI ) indicating whether zero or more of the multiple TRS resources sets are to be activated for the power saving mode .
  • TRS tracking reference signal
  • DCI downlink control information
  • Further exemplary embodiments are related to an apparatus of a base station, the apparatus having processing circuitry configured to configure transceiver circuitry to transmit a signal to a user equipment (UE ) comprising multiple tracking reference signal ( TRS ) resource sets for when the base station is to utili ze a power saving mode and configure transceiver circuitry to transmit downlink control information ( DCI ) indicating whether zero or more of the multiple TRS resources sets are to be activated for the power saving mode .
  • UE user equipment
  • TRS tracking reference signal
  • Still more exemplary embodiments are related to a processor configured to configure transceiver circuitry to transmit a signal to a user equipment (UE ) comprising multiple tracking reference signal ( TRS ) resource sets for when the base station is to utili ze a power saving mode and configure transceiver circuitry to transmit downlink control information (DCI) indicating whether zero or more of the multiple TRS resources sets are to be activated for the power saving mode.
  • UE user equipment
  • TRS tracking reference signal
  • DCI downlink control information
  • FIG. 1 shows an exemplary network arrangement according to various exemplary embodiments.
  • FIG. 2 shows an exemplary user equipment (UE) according to various exemplary embodiments.
  • FIG. 3 shows an exemplary base station according to various exemplary embodiments.
  • Fig. 4 shows a method for dynamic adaptation of PRACH resources according to various exemplary embodiments.
  • Fig. 5 shows an example abstract syntax notation one (ASN.l) according to various exemplary embodiments.
  • Fig. 6 shows a table according to various exemplary embodiments .
  • Fig. 7 shows a method for dynamic adaptation of physical random access channel (PRACH) resources according to various exemplary embodiments.
  • PRACH physical random access channel
  • Fig. 8 shows an example of DCI according to various exemplary embodiments. Detailed Description
  • the exemplary embodiments may be further understood with reference to the following description and the related appended drawings, wherein like elements are provided with the same reference numerals.
  • the exemplary embodiments introduce techniques configured to support the implementation of network power saving mechanisms.
  • the exemplary embodiments are described with regard to a user equipment (UE) .
  • UE user equipment
  • reference to a UE is merely provided for illustrative purposes.
  • the exemplary embodiments may be utilized with any electronic component that may establish a connection to a network and is configured with the hardware, software, and/or firmware to exchange information and data with the network. Therefore, the UE as described herein is used to represent any electronic component.
  • the exemplary embodiments are also described with regard to a fifth generation (5G) New Radio (NR) network and a next generation node B (gNB) .
  • 5G fifth generation
  • NR New Radio
  • gNB next generation node B
  • reference to a 5G NR network and a gNB is merely provided for illustrative purposes.
  • the exemplary embodiments may be utilized with any appropriate type of network and base station.
  • PSM network power saving mode
  • the term "PSM” may be used to refer to a time interval during which the gNB utilizes a sleep mode to conserve power.
  • Reference to PSM or a sleep mode does not necessarily mean putting processing components, transmitting components and/or receiving components for a cell operated by the gNB to sleep, in hibernation, or in deactivation. Instead, the PSM described herein relates to conserving power by discontinuing at least a subset of data exchange processing functionality associated with operating as a base station. Outside of the PSM, the gNB may use an active mode of data exchange processing to transmit and/or receive the traffic that is not exchanged during the PSM.
  • PSM network power saving mode
  • the gNB may discontinue transmitting physical downlink shared channel (PDSCH) , the gNB may discontinue transmitting periodic tracking reference signals (TRS) , the gNB may discontinue receiving physical uplink shared channel (PUSCH) and the gNB may discontinue transmitting and receiving various different types of periodic/semi-persistent (SP) signals (e.g., synchronization signal blocks (SSBs) , physical random access channel (PRACH) resources, periodic channel state information (CSI) reports, periodic CSI-reference signals (RS) , semi-persistent (SP) CSI- RS, periodic sounding reference signals (SRS) , SP SRS, etc.) .
  • SSBs synchronization signal blocks
  • PRACH physical random access channel
  • CSI periodic channel state information
  • RS periodic CSI-reference signals
  • SP semi-persistent
  • SRS periodic sounding reference signals
  • SP SRS periodic sounding reference signals
  • the UE may be configured to discontinue or omit various different types of operations. That is, the UE may adapt its behavior to the PSM of the gNB to ensure that the UE does not perform operations to transmit a signal that will not actually be received by the gNB due to PSM or operations to receive a signal that will not actually be transmitted by the gNB due to PSM.
  • the UE may discontinue transmitting PRACH resources during a random access channel (RACK) occasion, the UE may not attempt to measure CSI-RS resources (e.g., periodic CSI-RS, SP CSI-RS, TRS) , the UE may discontinue beam failure detection measurements, the UE may discontinue beam failure recovery measurements, the UE may discontinue reporting periodic/SP/aperiodic (AP) CSI on and for a serving cell, the UE may discontinue transmitting configured grant PUSCH, the UE may discontinue monitoring physical downlink control channel (PDCCH) on and for a serving cell, the UE may discontinue transmitting PUCCH on the serving cell (including scheduling request (SR) physical uplink control channel (PUCCH) transmission) , the UE may discontinue transmitting periodic/SP SRS on the serving cell and the UE may not receive SSB.
  • CSI-RS resources e.g., periodic CSI-RS, SP CSI-RS, TRS
  • CSI-RS resources e.g., periodic
  • the exemplary embodiments introduce techniques for dynamic adaptation of PRACH resources for network power saving.
  • the exemplary embodiments may notify the UE as to which PRACH configuration is to be utilized during PSM.
  • the exemplary embodiments may be utilized independently from one another, in conjunction with other currently implemented network power saving techniques, in conjunction with future implementations of network power saving techniques or independently from other network power saving techniques.
  • the exemplary embodiments introduce techniques for dynamic adaptation of periodic TRS resource sets for network power saving.
  • the exemplary embodiments may notify the UE of as to which TRS resource set is to be utilized during PSM.
  • the exemplary embodiments may be utilized independently from one another, in conjunction with other currently implemented network power saving technigues, in conjunction with future implementations of network power saving techniques or independently from other network power saving techniques.
  • Fig. 1 shows an exemplary network arrangement 100 according to various exemplary embodiments.
  • the exemplary network arrangement 100 includes a UE 110.
  • the UE 110 may be any type of electronic component that is configured to communicate via a network, e.g., mobile phones, tablet computers, desktop computers, smartphones, phablets, embedded devices, wearables, Internet of Things (loT) devices, etc.
  • a network e.g., mobile phones, tablet computers, desktop computers, smartphones, phablets, embedded devices, wearables, Internet of Things (loT) devices, etc.
  • an actual network arrangement may include any number of UEs being used by any number of users.
  • the example of a single UE 110 is merely provided for illustrative purposes .
  • the UE 110 may be configured to communicate with one or more networks.
  • the network with which the UE 110 may wirelessly communicate is a 5G NR radio access network (RAN) 120.
  • the UE 110 may also communicate with other types of networks (e.g., 5G cloud RAN, a next generation RAN (NG-RAN) , a long term evolution (LTE) RAN, a legacy cellular network, a wireless local area network (WLAN) , etc.) and the UE 110 may also communicate with networks over a wired connection.
  • the UE 110 may establish a connection with the 5G NR RAN 120. Therefore, the UE 110 may have a 5G NR chipset to communicate with the NR RAN 120.
  • the 5G NR RAN 120 may be a portion of a cellular network that may be deployed by a network carrier (e.g., Verizon, AT&T, T-Mobile, etc.) .
  • the 5G NR RAN 120 may include, for example, cells or base stations (Node Bs, eNodeBs, HeNBs, eNBS, gNBs, gNodeBs, macrocells, microcells, small cells, femtocells, etc.) that are configured to send and receive traffic from UEs that are equipped with the appropriate cellular chip set.
  • any association procedure may be performed for the UE 110 to connect to the 5G NR RAN 120.
  • the 5G NR RAN 120 may be associated with a particular cellular provider where the UE 110 and/or the user thereof has a contract and credential information (e.g., stored on a SIM card) .
  • the UE 110 may transmit the corresponding credential information to associate with the 5G NR RAN 120.
  • the UE 110 may associate with a specific base station, e.g., the gNB 120A.
  • the network arrangement 100 also includes a cellular core network 130, the Internet 140, an IP Multimedia Subsystem (IMS) 150, and a network services backbone 160.
  • the cellular core network 130 may refer an interconnected set of components that manages the operation and traffic of the cellular network. It may include the evolved packet core (EPC) and/or the 5G core (5GC) .
  • the cellular core network 130 also manages the traffic that flows between the cellular network and the Internet
  • the IMS 150 may be generally described as an architecture for delivering multimedia services to the UE 110 using the IP protocol.
  • the IMS 150 may communicate with the cellular core network 130 and the Internet 140 to provide the multimedia services to the UE 110.
  • the network services backbone 160 is in communication either directly or indirectly with the Internet 140 and the cellular core network 130.
  • the network services backbone 160 may be generally described as a set of components (e.g., servers, network storage arrangements, etc.) that implement a suite of services that may be used to extend the functionalities of the UE 110 in communication with the various networks .
  • Fig. 2 shows an exemplary UE 110 according to various exemplary embodiments.
  • the UE 110 will be described with regard to the network arrangement 100 of Fig. 1.
  • the UE 110 may include a processor 205, a memory arrangement 210, a display device 215, an input/output (I/O) device 220, a transceiver 225 and other components 230.
  • the other components 230 may include, for example, an audio input device, an audio output device, a power supply, a data acquisition device, ports to electrically connect the UE 110 to other electronic devices, etc.
  • the processor 205 may be configured to execute a plurality of engines of the UE 110.
  • the engines may include a network power saving engine 235.
  • the network power saving engine 235 may perform various operations related network power saving such as, but not limited to, receiving configuration information related to PSM operation, receiving downlink control information (DCI) and adapting the UE 110 behavior to the PSM operation.
  • DCI downlink control information
  • the above referenced engine 235 being an application (e.g., a program) executed by the processor 205 is merely provided for illustrative purposes.
  • the functionality associated with the engine 235 may also be represented as a separate incorporated component of the UE 110 or may be a modular component coupled to the UE 110, e.g., an integrated circuit with or without firmware.
  • the integrated circuit may include input circuitry to receive signals and processing circuitry to process the signals and other information.
  • the engines may also be embodied as one application or separate applications.
  • the functionality described for the processor 205 is split among two or more processors such as a baseband processor and an applications processor.
  • the exemplary embodiments may be implemented in any of these or other configurations of a UE .
  • the memory arrangement 210 may be a hardware component configured to store data related to operations performed by the UE 110.
  • the display device 215 may be a hardware component configured to show data to a user while the I/O device 220 may be a hardware component that enables the user to enter inputs.
  • the display device 215 and the I/O device 220 may be separate components or integrated together such as a touchscreen .
  • the transceiver 225 may be a hardware component configured to establish a connection with the 5G NR-RAN 120, an LTE-RAN (not pictured) , a legacy RAN (not pictured) , a WLAN (not pictured) , etc. Accordingly, the transceiver 225 may operate on a variety of different frequencies or channels (e.g. , set of consecutive frequencies) .
  • the transceiver 225 may encompass an advanced receiver (e.g. , E-MMSE-RC, R-ML, etc. ) for MU-MIMO.
  • the transceiver 225 includes circuitry configured to transmit and/or receive signals (e.g., control signals, data signals) .
  • the processor 205 may be operably coupled to the transceiver 225 and configured to receive from and/or transmit signals to the transceiver 225.
  • the processor 205 may be configured to encode and/or decode signals (e.g., signaling from a base station of a network) for implementing any one of the methods described herein.
  • Fig. 3 shows an exemplary base station 300 according to various exemplary embodiments.
  • the base station 300 may represent the gNB 120A or any other access node through which the UE 110 may establish a connection and manage network operations .
  • the base station 300 may include a processor 305, a memory arrangement 310, an input/output (I/O) device 315, a transceiver 320 and other components 325.
  • the other components 325 may include, for example, an audio input device, an audio output device, a battery, a data acquisition device, ports to electrically connect the base station 300 to other electronic devices and/or power sources, etc.
  • the processor 305 may be configured to execute a plurality of engines for the base station 300.
  • the network power saving engine 330 may perform various operations related network power saving such as, but not limited to, transmitting PSM configuration information, transmitting DCI and switching on and off PSM.
  • the above noted engine 330 being an application (e.g., a program) executed by the processor 305 is only exemplary.
  • the functionality associated with the engine 330 may also be represented as a separate incorporated component of the base station 300 or may be a modular component coupled to the base station 300, e.g., an integrated circuit with or without firmware.
  • the integrated circuit may include input circuitry to receive signals and processing circuitry to process the signals and other information.
  • the functionality described for the processor 305 is split among a plurality of processors (e.g., a baseband processor, an applications processor, etc.) .
  • the exemplary embodiments may be implemented in any of these or other configurations of a base station.
  • the memory 310 may be a hardware component configured to store data related to operations performed by the base station 300.
  • the I/O device 315 may be a hardware component or ports that enable a user to interact with the base station 300.
  • the transceiver 320 may operate on a variety of different frequencies or channels (e.g., set of consecutive frequencies) . Therefore, the transceiver 320 may include one or more components (e.g., radios) to enable the data exchange with the various networks and UEs.
  • the transceiver 320 includes circuitry configured to transmit and/or receive signals (e.g., control signals, data signals) . Such signals may be encoded with information implementing any one of the methods described herein.
  • the processor 305 may be operably coupled to the transceiver 320 and configured to receive from and/or transmit signals to the transceiver 320.
  • the processor 305 may be configured to encode and/or decode signals (e.g., signaling from a UE) for implementing any one of the methods described herein.
  • the exemplary embodiments introduce techniques for dynamic adaptation of PRACH resources for network power saving. As will be described in more detail below, the exemplary embodiments may enable fast RACH adaptation without the need for a system information update.
  • Fig. 4 shows a method 400 for dynamic adaptation of PRACH resources according to various exemplary embodiments. The method 400 is described from the perspective of the UE 110.
  • the UE 110 receives a SIB.
  • the SIB may include information that enables the UE 110 to subsequently perform dynamic PRACH resource adaptation.
  • the SIB may include a list of PRACH configurations that may be utilized by the UE 110 when the gNB 120A is in PSM.
  • the SIB may be a SIB1 with a RACH-Conf igGeneric IE enhanced to support a prach-
  • the UE 110 may receive information related to dynamic PRACH resource adaptation operation in any appropriate manner.
  • the UE 110 determines when the gNB 120A is to utilize PSM. For example, the UE 110 may receive a signal from the gNB 120A indicating that a particular PSM cycle or pattern is to be utilized by the gNB 120A. In another example, the UE 110 may implicitly determine that the gNB 120A has entered PSM.
  • the UE 110 determines a PRACH configuration that may be utilized for a RACK procedure during the PSM.
  • the PRACH configuration may indicate to the UE 110 parameters such as when the UE 110 is permitted to transmit PRACH resources and which kind of PRACH preamble should be transmitted.
  • the PRACH configuration index may indicate to the UE 110 which frame number and which subframe number (SFN) within the frame has PRACH resources, a preamble format (e.g. , 1, 2, 3, Al, A2 , B2, A3,B4, CO, Cl, C2, etc. ) , a periodicity and/or any other appropriate type of parameter.
  • SFN subframe number
  • the PRACH configuration may be dynamically indicated to the UE 110 by a PRACH indication field (PIE) in DCI .
  • PIE PRACH indication field
  • the bitwidth of the PIF may be represented as [log 2 (/V)] where N represents a number of entries in the prach- conf iguration-list provided in 405.
  • the exemplary embodiments introduce a new DCI format that may be used to provide this type of information.
  • this DCI format may be referred to as "DCI format 2 Y.”
  • the DCI format 2 Y include CRC bits scrambled with a dedicated RNTI provided to idle mode UEs via a SIB.
  • the RNTI for DCI format 2 Y may be hard encoded in the 3GPP Specifications or provided in any other appropriate manner.
  • reference to DCI format 2_Y is merely provided for illustrative purposes, the 2 Y classification provided herein may serve as a placeholder.
  • the new DCI format may be assigned any appropriate number or label.
  • the exemplary embodiments are not required to use a dedicated RNTI, an already defined RNTI or a future implementation of an RNTI may also be configured for DCI format 2_Y.
  • DCI format 2 Y a different type of DCI format, DCI format 2_X, may be introduced that includes information related to a PSM operation.
  • the DCI format 2 X may also be configured to include one or more PIFs. This may enable the network to support PRACH resource adaptation on a PSM cycle granularity.
  • reference to DCI format 2 Y and DCI format 2 X is merely provided for illustrative purposes.
  • An already defined DCI format may be enhanced to include the PIF or the PIF may be provided in any other appropriate manner.
  • the UE 110 may implicitly determine the PRACH configuration that may be utilized for a RACK procedure during the PSM. For example, if a PSMI field in DCI is set to a first value (e.g., 0) indicating that the gNB 120A is to enter PSM, a predefined or default PRACH configuration may be activated.
  • the default PRACH configuration may be the PRACH configuration with the lowest index in the prach-Conf iguration-List .
  • the default PRACH configuration may be the PRACH configuration with a largest periodicity.
  • the default BRACH configuration may be explicitly configured by a SIB (e.g. , SIB1, etc. ) .
  • the UE 110 performs operations using the indicated BRACH resources. For example, the UE 110 may transmit an indicated BRACH preamble using the indicated BRACH resources.
  • Fig. 6 shows a table 600 according to various exemplary embodiments.
  • the table 600 shows an exemplary list comprising multiple pairs of prach-conf igurationlndex entries and msgl-FDM values each corresponding to an entry of the prach- conf iguration-list .
  • the table 600 only shows a subset of the parameters that may be associated with a prach- Conf igurationlndex (e.g., index #, preamble format, periodicity) .
  • index # e.g., index #, preamble format, periodicity
  • a 2-bit RIF field may be provided in DCI (e.g., DCI format 2 Y, DCI format 2 X, etc.) that indicates the selected BRACH configuration to be used by the UE 110 to adapt to the BSM.
  • DCI e.g., DCI format 2 Y, DCI format 2 X, etc.
  • the BRACH configuration index associated with #0 in the prach-conf iguration-list may be activated by default when a BSMI field in the detected DCI is set to 0 because it has the largest periodicity.
  • the BRACH configuration index associated with #4 in the prach- configuration-list may be activated by default when a PSMI field in the detected DCI is set to 0 because it is the lowest entry in the prach-conf iguration-list .
  • the exemplary embodiments introduce techniques for dynamic adaptation of periodic TRS resource set .
  • a TRS may be configured for downlink time and frequency tracking and each TRS resource set may consist of multiple periodic reference signals .
  • the exemplary embodiments may enable the UE 110 to adapt to the TRS resource set that is to be used during PSM .
  • Fig . 7 shows a method 700 for dynamic adaptation of PRACH resources according to various exemplary embodiments .
  • the method 700 is described from the perspective of the UE 110 .
  • the UE 110 receives configuration information for multiple TRS resource sets .
  • RRC connected mode UEs may receive the configuration information for the multiple TRS resource sets via dedicated RRC signaling .
  • one or more TRS resource sets provided via RRC signaling may be denoted as N RS .
  • RRC idle mode UEs may receive the configuration information for the multiple TRS resource sets via S IB1 .
  • one or more TRS resource sets provided via S IB1 may be denoted as N ⁇ RS .
  • the exemplary embodiments are not required to provide this configuration information to the UE 110 via either RRC signaling or S IB .
  • the exemplary embodiments may provide this type of configuration information to the UE 110 in any appropriate manner .
  • the UE 110 receives information related to DCI that may be subsequently received by the UE 110.
  • the exemplary embodiments introduce two new types of DCI that may be utilized for dynamic adaptation of periodic TRS resource set.
  • DCI format 2_W one new DCI format
  • DCI format 2 Z The other new DCI format may be referred to as "DCI format 2 Z.”
  • reference to DCI format 2 W and DCI format 2 Z are merely provided for illustrative purposes, the 2 W and 2_Z classifications provided herein may serve as a placeholder.
  • the new DCI formats may be assigned any appropriate number or label.
  • information related to the DCI format 2 W may be provided to the UE 110 in SIB1.
  • SIB1 may provide a dedicated RNTI to the UE 110 that may be used to CRC scramble the DCI format 2 W.
  • the dedicated RNTI may be hard encoded in 3GPP Specifications or provided to the UE 110 in any other appropriate manner. Subsequently, RRC idle mode UEs may process the DCI format 2 W using the dedicated RNTI.
  • information related to the DCI format 2 Z may be provided to the UE 110 via dedicated RRC signaling.
  • one or more RRC signals may provide a dedicated RNTI to the UE 110 that may be used to CRC scramble the DCI format 2 Z.
  • the dedicated RNTI may provide be hard encoded in 3GPP Specifications or provided to the UE 110 in any other appropriate manner.
  • the dedicated RNTI may be cell specific (e.g., RRC signaling) or group specific
  • the information related to the DCI may further comprise a payload size of DCI format 2 W, a location in DCI format 2 W of a starting position of a TRS indication (TRSI) field for a serving cell, a search space set configuration for monitoring for DCI format 2 W, a payload size of DCI format 2 Z, a location in DCI format 2 Z of a location in DCI format 2 Z of a starting position of a TRSI field for a serving cell, a search space set configuration for monitoring for DCI format 2 Z, any combination thereof and/or any other appropriate type of information .
  • TRSI TRS indication
  • the UE 110 determines when the gNB 120A is to utilize PSM. For example, the UE 110 may receive a signal from the gNB 120A indicating that a particular PSM cycle or pattern is to be utilized by the gNB 120A. In another example, the UE 110 may implicitly determine that the gNB 120A has entered PSM.
  • the UE 110 receives DCI (e.g. , DCI format 2 W, DCI format 2_Z, etc. ) .
  • the UE 110 determines which TRS resource set is activated for PSM.
  • the DCI may indicate to the UE 110 which TRS resource set is activated for PSM.
  • the UE 110 performs operations using the indicated TRS resource set. However, in some examples, none of the TRS resource sets may be activated.
  • Fig. 8 shows an example of DCI 800 according to various exemplary embodiments.
  • the exemplary DCI 800 may represent an example of DCI format 2_W or DCI format 2_Z .
  • the DCI 800 comprises multiple TRSI fields (e. j. , TRSI #1, TRSI #2... TRSI #K) .
  • the bitwidth of the TRSI field may be denoted as [log 2 M + 1)] bits where M is the number of TRS resource sets previously configured by SIB or RRC signaling (e.g., 705) .
  • a state of a TRSI field may be reserved to indicate that all configured TRS resource sets are deactivated. Accordingly, in some embodiments [log 2 (M + 1)] may utilized instead of [ZO# 2 (M)].
  • the exemplary DCI 800 may include other fields that may carry any other appropriate type of information and may be CRC scrambled.
  • a 2-bit TRSI field may be utilized for TRS resource set adaptation.
  • the UE 110 may be configured with three TRS resource sets via SIB or RRC signaling in 705 of the method 700.
  • the DCI in 720 may dynamically indicate which TRS resource set may is to be utilized by the gNB 120A using a 2-bit TRSI field.
  • a TRSI field set to a value of '01' may indicate that a first TRS resource set is activated
  • a TRSI field set to a value of '10' may indicate that a second TRS resource set is activated
  • a TRSI field set to a value of 'll' may indicate that a third TRS resource set is activated.
  • one TRS field value (e.g., '00' ) may be utilized to indicate that all of the TRS resource sets are to be deactivated.
  • a method is performed by a user equipment (UE) , comprising receiving a system information block (SIB) from a base station comprising a set of physical random access channel (BRACH) configurations for when the base station is to utilize a power saving mode and determining one of the BRACH configurations from the set of BRACH configurations is to be utilized for a random access channel (RACH) procedure.
  • SIB system information block
  • BRACH physical random access channel
  • RACH random access channel
  • the method of the first example further comprising receiving downlink control information (DCI) , the DCI indicating which BRACH configuration has been selected by the base station for the power saving mode.
  • DCI downlink control information
  • the method of the fourth example wherein the DCI comprises a BRACH configuration indication field (BIF) configured to dynamically indicate one BRACH configuration from the set of BRACH configurations.
  • BIF BRACH configuration indication field
  • a bitwidth of the RIF is based on a number of entries in a prach-Conf iguration-list parameter provided in the SIB.
  • the DCI comprises a power saving mode indicator (PSMI) set to a first value, the first value indicating that a default BRACH configuration is to be utilized for power saving mode .
  • PSMI power saving mode indicator
  • the method of the seventh example wherein the default PRACH configuration is a BRACH configuration from the set of PRACH configurations with a lowest index in a prach-Conf iguration-list parameter provided in the SIB.
  • the method of the seventh example wherein the default PRACH configuration is a PRACH configuration from the set of PRACH configurations with a largest periodicity.
  • a processor configured to perform any of the methods of the first through tenth examples.
  • a user equipment comprising a transceiver configured to communicate with a network and a processor communicatively coupled to the transceiver and configured to perform any of the methods of the first through tenth examples.
  • a method is performed by a base station, comprising transmitting a system information block (SIB) comprising a set of physical random access channel (PRACH) configurations for when the base station is to utilize a power saving mode and transmitting downlink control information (DCI) to a user equipment (UE) , the DCI indicating one PRACH configuration from the set of PRACH configurations is to be utilized for a random access channel (RACH) procedure.
  • SIB system information block
  • PRACH physical random access channel
  • RACH random access channel
  • the method of the thirteenth example wherein the SIB includes a first information element (IE) comprising a list of prach-conf igurationlndex IES .
  • the first IE further comprises a list of message 1 (msgl ) -frequency division multiplexing (FDM) IES .
  • the method of the thirteenth example wherein the DCI comprises a PRACH configuration indicator field (PIE) configured to dynamically indicate one PRACH configuration from the set of PRACH configurations.
  • PIE PRACH configuration indicator field
  • a bitwidth of the PIE is based on a number of entries in a prach-Conf iguration-list parameter provided in the SIB.
  • the method of the thirteenth example wherein the DCI comprises a power saving mode indicator (PSMI) set to a first value, the first value indicating that a default PRACH configuration is to be utilized for power saving mode .
  • PSMI power saving mode indicator
  • the method of the eighteenth example wherein the default PRACH configuration is a PRACH configuration from the set of PRACH configurations with a lowest index in a prach-Conf iguration-list parameter provided in the SIB.
  • the method of the eighteenth example, wherein the default PRACH configuration is a PRACH configuration from the set of PRACH configurations with a largest periodicity.
  • the method of the eighteenth example, wherein the default PRACH configuration is explicitly indicated in the SIB.
  • a processor configured to perform any of the methods of the thirteenth through twenty first examples.
  • a base station comprising a transceiver configured to communicate with a user equipment (UE) and a processor communicatively coupled to the transceiver and configured to perform any of the methods of the thirteenth through twenty first examples.
  • UE user equipment
  • a method is performed by a user equipment (UE) , comprising receiving a signal from a base station comprising multiple tracking reference signal (TRS) resource sets for when the base station is to utilize a power saving mode and receiving downlink control information (DCI) indicating whether zero or more of the multiple TRS resources sets are to be activated for the power saving mode.
  • UE user equipment
  • the method of the twenty fourth example wherein the signal is a system information block (SIB) .
  • SIB system information block
  • the method of the twenty fourth example wherein the signal is provided by dedicated radio resource control (RRC) signaling.
  • RRC radio resource control
  • the method of the twenty fourth example wherein the signal further comprises a payload size of the DCI .
  • the method of the twenty fourth example wherein the signal further comprises a starting location of a TRS indicator (TRSI) field within the DCI associated with a serving cell for the UE .
  • TRSI TRS indicator
  • the method of the twenty fourth example wherein the signal further comprises a search space set configuration for monitoring physical downlink control channel (PDCCH) to detect the DCI.
  • PDCCH physical downlink control channel
  • the method of the twenty fourth example further comprising receiving a dedicated radio network temporary identifier (RNTI) for the DCI.
  • RNTI dedicated radio network temporary identifier
  • the method of the twenty fourth example further comprising receiving a dedicated radio network temporary identifier (RNTI) for the DCI, wherein the dedicated RNTI is group specific and provided to the UE via dedicated radio resource control (RRC) signaling.
  • RNTI dedicated radio network temporary identifier
  • RRC dedicated radio resource control
  • the method of the twenty fourth example wherein the DCI comprises one or more TRS indicator fields configured to dynamically indicate whether one of the multiple TRS resource sets selected by the base station.
  • the method of the thirty third example wherein a number of bits for a first TRS indicator field is based on at least a quantity of the multiple TRS resource sets .
  • the method of the thirty fourth example wherein the number of bits for the first TRS indicator field is further based on the quantity of the multiple TRS resource sets plus an additional bit configured to indicate that all of the multiple TRS resource sets are to be deactivated .
  • the method of the thirty third example further comprising, when the DCI indicates that one of the multiple TRS resource sets has been selected by the base station, a value in a first TRS indicator field indicate a specific one of the multiple TRS resource sets .
  • a TRS indicator field of the DCI contains a value configured to indicate that the multiple TRS resources sets are to be deactivated for PSM .
  • a processor configured to perform any of the methods of the twenty fourth through thirty seventh examples .
  • a user equipment comprising a transceiver configured to communicate with a network and a processor communicatively coupled to the transceiver and configured to perform any of the methods of the twenty fourth through thirty seventh examples .
  • a method is performed by a base station, comprising transmitting a signal to a user equipment (UE) comprising multiple tracking reference signal (TRS) resource sets for when the base station is to utilize a power saving mode and transmitting downlink control information (DCI) indicating whether zero or more of the multiple TRS resources sets are to be activated for the power saving mode.
  • UE user equipment
  • TRS tracking reference signal
  • the method of the fortieth example wherein the signal is a system information block (SIB) .
  • SIB system information block
  • RRC radio resource control
  • the method of the fortieth example wherein the signal further comprises a payload size of the DCI.
  • the method of the fortieth example wherein the signal further comprises a starting location of a TRS indicator (TRSI) within the DCI associated with a serving cell for the UE .
  • TRSI TRS indicator
  • the method of the fortieth example wherein the signal further comprises a search space set configuration for monitoring physical downlink control channel (PDCCH) to detect the DCI .
  • PDCCH physical downlink control channel
  • the method of the fortieth example further comprising transmitting a dedicated radio network temporary identifier (RNTI) for the DCI to the UE, wherein the dedicated RNTI is group specific and provided to the UE via dedicated radio resource control (RRC) signaling.
  • RNTI radio network temporary identifier
  • RRC dedicated radio resource control
  • the method of the fortieth example wherein the DCI comprises one or more TRS indicator fields configured to dynamically indicate whether one of the multiple TRS resource sets selected by the base station.
  • a number of bits for a first TRS indicator field is based on at least a quantity of the multiple TRS resource sets.
  • the method of the forty eighth example wherein the number of bits for the first TRS indicator field is further based on the quantity of the multiple TRS resource sets plus an additional bit configured to indicate that all of the multiple TRS resource sets are to be deactivated.
  • the method of the forty eighth example further comprising, when the DCI indicates that one of the multiple TRS resource sets has been selected by the base station, a value in a first TRS indicator field indicates a specific one of the multiple TRS resource sets.
  • a processor configured to perform any of the methods of the fortieth through fi fty first examples .
  • a base station comprising a transceiver configured to communicate with a user equipment (UE ) and a processor communicatively coupled to the transceiver and configured to perform any of the methods of the fortieth through fi fty first examples .
  • UE user equipment
  • An exemplary hardware platform for implementing the exemplary embodiments may include, for example , an Intel x86 based platform with compatible operating system, a Windows OS , a Mac platform and MAC OS , a mobile device having an operating system such as iOS , Android, etc .
  • the exemplary embodiments of the above described method may be embodied as a program containing lines of code stored on a non-transitory computer readable storage medium that , when compiled, may be executed on a processor or microprocessor .

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

Abstract

L'invention concerne un équipement utilisateur (UE) conçu pour décoder, sur la base d'une signalisation reçue en provenance d'une station de base, un bloc d'informations système (SIB) comprenant un ensemble de configurations de canal d'accès aléatoire physique (PRACH) pour le moment où la station de base doit utiliser un mode d'économie d'énergie et déterminer l'une des configurations PRACH à partir de l'ensemble de configurations PRACH devant être utilisée pour une procédure de canal d'accès aléatoire (RACK).
PCT/US2023/030047 2022-08-11 2023-08-11 Procédé et appareil de ressource prach et de suivi d'adaptation de signal de référence dans communication sans fil WO2024035916A1 (fr)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101778458B (zh) * 2010-01-05 2015-09-16 中兴通讯股份有限公司 一种基站节能方法及系统
EP2836005B1 (fr) * 2010-01-08 2016-11-30 Interdigital Patent Holdings, Inc. Noeud de base en communication avec un réseau sans fil et procédé correspondant
WO2021015863A1 (fr) * 2019-07-22 2021-01-28 Qualcomm Incorporated Évitement de conflit entre des messages d'accès aléatoire et d'autres transmissions

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101778458B (zh) * 2010-01-05 2015-09-16 中兴通讯股份有限公司 一种基站节能方法及系统
EP2836005B1 (fr) * 2010-01-08 2016-11-30 Interdigital Patent Holdings, Inc. Noeud de base en communication avec un réseau sans fil et procédé correspondant
WO2021015863A1 (fr) * 2019-07-22 2021-01-28 Qualcomm Incorporated Évitement de conflit entre des messages d'accès aléatoire et d'autres transmissions

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