WO2024103310A1 - 无线通信的方法、终端设备和网络设备 - Google Patents

无线通信的方法、终端设备和网络设备 Download PDF

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Publication number
WO2024103310A1
WO2024103310A1 PCT/CN2022/132346 CN2022132346W WO2024103310A1 WO 2024103310 A1 WO2024103310 A1 WO 2024103310A1 CN 2022132346 W CN2022132346 W CN 2022132346W WO 2024103310 A1 WO2024103310 A1 WO 2024103310A1
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Prior art keywords
network device
target
tag
target network
terminal device
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PCT/CN2022/132346
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English (en)
French (fr)
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曹建飞
尤心
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Oppo广东移动通信有限公司
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Priority to PCT/CN2022/132346 priority Critical patent/WO2024103310A1/zh
Publication of WO2024103310A1 publication Critical patent/WO2024103310A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00Modulated-carrier systems

Definitions

  • the embodiments of the present application relate to the field of communications, and specifically to a wireless communication method, terminal equipment, and network equipment.
  • the terminal device can obtain an initial timing advance (TA) through a random access process, and further send an uplink channel or uplink signal based on the initial TA.
  • TA timing advance
  • TRPs transmission reception points
  • the present application provides a wireless communication method, terminal equipment and network equipment, which are conducive to the terminal equipment selecting a suitable TA.
  • a method for wireless communication including: a terminal device receives a first signaling sent by a first network device, the first signaling is used to instruct the terminal device to initiate a random access process to a target network device, wherein the first signaling includes first indication information, and the first indication information is used to indicate the target network device; the terminal device sends a physical random access channel PRACH to the target network device; the terminal device receives a random access response RAR, the RAR includes a target timing advance TA value, and the target TA value is the TA value of the terminal device to the target network device.
  • a method for wireless communication comprising: a first network device sends a first signaling to a terminal device, the first signaling being used to instruct the terminal device to initiate a random access process to a target network device, wherein the first signaling includes first indication information, and the first indication information is used to indicate the target network device.
  • a terminal device for executing the method in the first aspect or its various implementations.
  • the terminal device includes a functional module for executing the method in the above-mentioned first aspect or its various implementation modes.
  • a network device for executing the method in the second aspect or its respective implementation manners.
  • the network device includes a functional module for executing the method in the above-mentioned second aspect or its various implementation modes.
  • a terminal device comprising a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method in the first aspect or its implementations.
  • a network device comprising a processor and a memory, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program stored in the memory to execute the method in the second aspect or its implementation manners.
  • a chip is provided for implementing the method in any one of the first to second aspects or in each of their implementations.
  • the chip includes: a processor, which is used to call and run a computer program from a memory, so that a device equipped with the device executes a method as described in any one of the first to second aspects or their respective implementations.
  • a computer-readable storage medium for storing a computer program, wherein the computer program enables a computer to execute the method of any one of the first to second aspects or any of their implementations.
  • a computer program product comprising computer program instructions, wherein the computer program instructions enable a computer to execute the method in any one of the first to second aspects or any of their implementations.
  • a computer program which, when executed on a computer, enables the computer to execute the method in any one of the first to second aspects or in each of their implementations.
  • the first network device can trigger the terminal device to initiate random access to the target network device through the first signaling. Further, the terminal device can send PRACH to the target network device, receive the random access response RAR, and obtain the TA value of the terminal device to the target network device from the RAR. Therefore, in the embodiment of the present application, by designing the first signaling, the terminal device can initiate random access to a specific network device, and then obtain the TA of the terminal device to the specific network device, that is, the acquisition of the TA at the granularity of the specific network device is realized, which is conducive to the terminal device to obtain the appropriate TA.
  • the TRP synchronized with the uplink of the terminal device can trigger the terminal device to initiate random access to other TRPs to obtain the TA value of the terminal device to other TRPs.
  • the terminal device can use the TA value corresponding to each TRP to initiate uplink transmission to each TRP, which is conducive to ensuring the uplink synchronization between the terminal device and each TRP.
  • FIG1 is a schematic diagram of a communication system architecture provided in an embodiment of the present application.
  • Figure 2 is a format diagram of a MAC CE for differential adjustment of TA.
  • FIG3 is a schematic diagram of the format of a MAC CE indicating the absolute value of TA.
  • Figure 4 is a schematic diagram of the format of MAC RAR signaling carrying TA.
  • FIG. 5 is a schematic diagram of timing advance for downlink reception and uplink transmission.
  • FIG6 is a scenario diagram of uplink transmission based on multiple TRPs with multiple DCI scheduling.
  • FIG. 7 is a schematic diagram of a four-step random access process.
  • FIG8 is a schematic interaction diagram of a wireless communication method provided according to an embodiment of the present application.
  • FIG. 9 is a schematic interaction diagram of a wireless communication method according to an embodiment of the present application.
  • FIG10 is a schematic interaction diagram of another wireless communication method according to an embodiment of the present application.
  • FIG11 is a schematic interaction diagram of yet another wireless communication method according to an embodiment of the present application.
  • FIG12 is a schematic interaction diagram of a wireless communication method according to another embodiment of the present application.
  • FIG13 is a schematic interaction diagram of another wireless communication method according to another embodiment of the present application.
  • FIG14 is a schematic interaction diagram of yet another wireless communication method according to another embodiment of the present application.
  • FIG15 is a schematic interaction diagram of a method for wireless communication according to yet another embodiment of the present application.
  • FIG16 is a schematic interaction diagram of another wireless communication method according to yet another embodiment of the present application.
  • FIG17 is a schematic interaction diagram of yet another wireless communication method according to yet another embodiment of the present application.
  • FIG18 is a schematic interaction diagram of another wireless communication method provided according to an embodiment of the present application.
  • FIG. 19 is a schematic interaction diagram of a method for wireless communication according to an embodiment of the present application.
  • FIG20 is a schematic interaction diagram of a method for wireless communication according to an embodiment of the present application.
  • Figure 21 is a schematic block diagram of a terminal device provided according to an embodiment of the present application.
  • Figure 22 is a schematic block diagram of a network device provided according to an embodiment of the present application.
  • Figure 23 is a schematic block diagram of another network device provided according to an embodiment of the present application.
  • Figure 24 is a schematic block diagram of another terminal device provided according to an embodiment of the present application.
  • Figure 25 is a schematic block diagram of another network device provided according to an embodiment of the present application.
  • Figure 26 is a schematic block diagram of a communication device provided according to an embodiment of the present application.
  • Figure 27 is a schematic block diagram of a chip provided according to an embodiment of the present application.
  • Figure 28 is a schematic block diagram of a communication system provided according to an embodiment of the present application.
  • GSM Global System of Mobile communication
  • CDMA Code Division Multiple Access
  • WCDMA Wideband Code Division Multiple Access
  • GPRS General Packet Radio Service
  • LTE Long Term Evolution
  • LTE-A Advanced long term evolution
  • NR New Radio
  • LTE-based access to unlicensed spectrum (LTE-U) systems LTE-based access to unlicensed spectrum (LTE-U) systems
  • NR-based access to unlicensed spectrum (NR-U) systems NTN-based access to unlicensed spectrum (NR-U) systems
  • NTN non-terrestrial communication networks
  • UMTS universal mobile telecommunication systems
  • WLAN wireless local area networks
  • WiFi wireless fidelity
  • 5G fifth-generation communication
  • D2D Device to Device
  • M2M Machine to Machine
  • MTC Machine Type Communication
  • V2V vehicle to vehicle
  • V2X vehicle to everything
  • the communication system in the embodiment of the present application can be applied to a carrier aggregation (CA) scenario, a dual connectivity (DC) scenario, or a standalone (SA) networking scenario.
  • CA carrier aggregation
  • DC dual connectivity
  • SA standalone
  • the communication system in the embodiment of the present application can be applied to an unlicensed spectrum, wherein the unlicensed spectrum can also be considered as a shared spectrum; or, the communication system in the embodiment of the present application can also be applied to an authorized spectrum, wherein the authorized spectrum can also be considered as an unshared spectrum.
  • the embodiments of the present application describe various embodiments in conjunction with network equipment and terminal equipment, wherein the terminal equipment may also be referred to as user equipment (UE), access terminal, user unit, user station, mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication equipment, user agent or user device, etc.
  • UE user equipment
  • the terminal device can be a station (STA) in a WLAN, a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA) device, a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device, a wearable device, a terminal device in the next generation communication system such as the NR network, or a terminal device in the future evolved Public Land Mobile Network (PLMN) network, etc.
  • STA station
  • WLAN Wireless Local Loop
  • PDA Personal Digital Assistant
  • the terminal device can be deployed on land, including indoors or outdoors, handheld, wearable or vehicle-mounted; it can also be deployed on the water surface (such as ships, etc.); it can also be deployed in the air (for example, on airplanes, balloons and satellites, etc.).
  • the terminal device may be a mobile phone, a tablet computer, a computer with wireless transceiver function, a virtual reality (VR) terminal device, an augmented reality (AR) terminal device, a wireless terminal device in industrial control, a wireless terminal device in self-driving, a wireless terminal device in remote medical, a wireless terminal device in smart grid, a wireless terminal device in transportation safety, a wireless terminal device in a smart city, or a wireless terminal device in a smart home, etc.
  • VR virtual reality
  • AR augmented reality
  • the terminal device may also be a wearable device.
  • Wearable devices may also be referred to as wearable smart devices, which are a general term for wearable devices that are intelligently designed and developed using wearable technology for daily wear, such as glasses, gloves, watches, clothing, and shoes.
  • a wearable device is a portable device that is worn directly on the body or integrated into the user's clothes or accessories. Wearable devices are not only hardware devices, but also powerful functions achieved through software support, data interaction, and cloud interaction.
  • wearable smart devices include full-featured, large-sized, and fully or partially independent of smartphones, such as smart watches or smart glasses, as well as devices that only focus on a certain type of application function and need to be used in conjunction with other devices such as smartphones, such as various types of smart bracelets and smart jewelry for vital sign monitoring.
  • the network device may be a device for communicating with a mobile device.
  • the network device may be an access point (AP) in WLAN, a base station (BTS) in GSM or CDMA, a base station (NodeB, NB) in WCDMA, an evolved base station (Evolutional Node B, eNB or eNodeB) in LTE, or a relay station or access point, or a vehicle-mounted device, a wearable device, and a network device (gNB) in an NR network, or a network device in a future evolved PLMN network, or a network device in an NTN network, etc.
  • the network device may have a mobile feature, for example, the network device may be a mobile device.
  • the network device may be a satellite or a balloon station.
  • the satellite may be a low earth orbit (LEO) satellite, a medium earth orbit (MEO) satellite, a geostationary earth orbit (GEO) satellite, a high elliptical orbit (HEO) satellite, etc.
  • the network device may also be a base station set up in a location such as land or water.
  • a network device can provide services for a cell, and a terminal device communicates with the network device through transmission resources used by the cell (for example, frequency domain resources, or spectrum resources).
  • the cell can be a cell corresponding to a network device (for example, a base station), and the cell can belong to a macro base station or a base station corresponding to a small cell.
  • the small cells here may include: metro cells, micro cells, pico cells, femto cells, etc. These small cells have the characteristics of small coverage and low transmission power, and are suitable for providing high-speed data transmission services.
  • the communication system 100 may include a network device 110, which may be a device that communicates with a terminal device 120 (or referred to as a communication terminal or terminal).
  • the network device 110 may provide communication coverage for a specific geographic area and may communicate with terminal devices located in the coverage area.
  • FIG1 exemplarily shows a network device and two terminal devices.
  • the communication system 100 may include multiple network devices and each network device may include another number of terminal devices within its coverage area, which is not limited in the embodiments of the present application.
  • the communication system 100 may also include other network entities such as a network controller and a mobility management entity, which is not limited in the embodiments of the present application.
  • network entities such as a network controller and a mobility management entity, which is not limited in the embodiments of the present application.
  • the device with communication function in the network/system in the embodiment of the present application can be called a communication device.
  • the communication device may include a network device 110 and a terminal device 120 with communication function, and the network device 110 and the terminal device 120 may be the specific devices described above, which will not be repeated here; the communication device may also include other devices in the communication system 100, such as other network entities such as a network controller and a mobile management entity, which is not limited in the embodiment of the present application.
  • the "indication" mentioned in the embodiments of the present application can be a direct indication, an indirect indication, or an indication of an association relationship.
  • a indicates B which can mean that A directly indicates B, for example, B can be obtained through A; it can also mean that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also mean that there is an association relationship between A and B.
  • corresponding may indicate a direct or indirect correspondence between two items, or an association relationship between the two items, or a relationship of indication and being indicated, configuration and being configured, etc.
  • pre-definition can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in a device (for example, including a terminal device and a network device), and the present application does not limit the specific implementation method.
  • pre-definition can refer to what is defined in the protocol.
  • the "protocol” may refer to a standard protocol in the communication field, for example, it may include an LTE protocol, an NR protocol, and related protocols used in future communication systems, and the present application does not limit this.
  • timing advance related to the present application is explained.
  • a UE in a cell group (CG), can be configured with up to 4 timing advance groups (TAGs). TAGs can be configured through Radio Resource Control (RRC).
  • RRC Radio Resource Control
  • a CG can include multiple serving cells, and each serving cell will be assigned a TAG identifier (Timing Advance Group Identity, TAG-Id). Each TAG will have a time alignment timer (TimeAlignmentTimer), and the UE will count the time alignment timer. When this timer times out, the UE will consider that the TAG is out of synchronization in the uplink.
  • the timer When the network device adjusts the TA value through the Media Access Control Control Element (MAC CE) or other signaling during the operation of the timer, the timer will be reset, and the UE will consider that the TAG is in uplink synchronization. For example, if the value of TimeAlignmentTimer is configured to 500ms, that is, the network device needs to update (adjust) the TA value of the UE once within 500ms, otherwise, the UE may consider that the uplink is out of synchronization and may initiate a random access process when uplink data arrives.
  • MAC CE Media Access Control Control Element
  • the TA of the UE can be calculated according to the following formula.
  • the TA of the UE is based on the first path of the downlink channel received by the UE, that is, the first symbol of the time slot where the channel is located as the downlink reference, and the early transmission is performed on this basis:
  • each serving cell can be pre-configured with a timing advance offset (TA offset), for example, through a high-level parameter (n-TimingAdvanceOffset), which is N TA,offset in the formula.
  • the TA adjustment amount (N TA ) is based on the pre-configured TA offset.
  • N TA can be differentially adjusted by the MAC CE of the network device, that is, the current TA adjustment (new) is based on the last (old) TA, and is adjusted forward or backward in time.
  • the calculation formula is as follows:
  • the MAC CE format for differential adjustment of TA is shown in FIG2 , wherein the adjustment of TA is to adjust TA minimum time units based on the previous TA, and the granularity of the TA adjustment is TAG.
  • the network device can indicate to the UE the absolute value of TA for uplink transmission.
  • the network device can directly indicate the absolute value of TA N TA through the MAC CE command shown in Figure 3. Its value range is 0 to 3846 and its length is 12 bits.
  • the MAC CE command is applicable to the Primary Timing Advance Group (PTAG) corresponding to the corresponding MAC entity, that is, the definition of the PTAG is to include special cells (SpCells). Because the MAC CE is only applicable to PTAG, it does not need to include TAG-Id.
  • PTAG Primary Timing Advance Group
  • SpCells special cells
  • the UE during the initial access (cell) of the UE, after the UE sends a Physical Random Access Channel (PRACH) to the network device, the UE expects the network device to give the UE a TA indication through a Media Access Control Random Access Response (MAC RAR) within a certain time window.
  • Figure 4 shows a format of MAC RAR signaling carrying TA. The UE can obtain an initial TA absolute value of 12 bits based on the MAC RAR.
  • the reference point of the UE timing advance is calculated from the downlink reception time point, and the uplink channel or uplink signal is sent forward by (N TA +N TA,offset )*T C , as shown in Figure 5.
  • repetition of Physical Uplink Control Channel (PUCCH) or Physical Uplink Shared Channel (PUSCH) based on multi-TRP (mTRP) is supported to enhance uplink coverage and transmission reliability.
  • UE needs to send PUCCH or PUSCH carrying the same content to different TRPs.
  • multi-PUSCH multiple PUSCH
  • sDCI single downlink control information
  • the UE can use one TA to sequentially send PUSCH to different TRPs;
  • multi-DCI, mDCI since there may not be a sufficiently ideal backhaul as a connection between multiple TRPs, multiple TRPs perform independent scheduling on the UE. This operation may cause temporal overlap of PUSCH/PUCCH for different TRPs. Therefore, it is also necessary to support different TA updates or indications for different TRPs.
  • TRP#1 and TRP#2 use the same PCI, as shown in Figure 6.
  • Each TRP can schedule PDSCH/PUSCH transmission on the TRP through its own DCI.
  • the control resource set (CORESET) is grouped by the RRC parameter control resource set pool index (CORESETPoolIndex).
  • CORESETPoolIndex RRC parameter control resource set pool index
  • a CORESET with CORESETPoolIndex of "0" is grouped into one group, corresponding to one TRP; a CORESET with CORESETPoolIndex of "1" is grouped into another group, corresponding to another TRP.
  • the network device does not configure CORESETPoolIndex for a CORESET, its default value is "0".
  • TRP#1 in Figure 6 can be understood as the reference TRP, that is, the TRP accessed by the UE when it initially accesses.
  • the UE has achieved uplink and downlink synchronization, and it has an exclusive Physical Cell Identifier (PCI) #1.
  • PCI Physical Cell Identifier
  • TRPs since the network equipment can select one TRP from up to 7 TRPs to provide additional uplink transmission services for the UE, these TRPs have different PCIs from the service TRP, and often uplink and downlink synchronization is not established with the UE in advance.
  • the concept of Transmission Configuration Indicator (TCI) state is proposed for downlink spatial domain quasi-co-located (QCL) (beam) indication, as well as the transmission of QCL information in the time and frequency domains.
  • the quasi-co-located (QCL) relationship can be simply described as a large-scale fading relationship from a source reference signal to a target reference signal.
  • the UE After the UE obtains the QCL relationship between the two source reference signals and the target reference signal from the network device, it can use the receiving beam that previously received the source reference signal when receiving the target reference signal.
  • the TCI state indication mechanism is only applicable to downlink channels and signals.
  • the concept of spatial relation is defined to express the spatial relationship between two reference signals.
  • the concept of unified TCI state is proposed based on the design of TCI state.
  • the important functions it adds are as follows:
  • the joint TCI state is applicable to uplink and downlink channels and signals; the downlink (DL) TCI state is only applicable to downlink channels and signals; and the uplink (DL) TCI state is only applicable to uplink channels and signals.
  • Downlink channels (part of the Physical Downlink Control Channel (PDCCH), Physical Downlink Shared Channel (PDSCH)) and signals (aperiodic Channel State Information Reference Signal (CSI-RS)) use the same downlink transmit beam, for example, using DL TCI state or joint TCI state.
  • PDCCH Physical Downlink Control Channel
  • PDSCH Physical Downlink Shared Channel
  • CSI-RS periodic Channel State Information Reference Signal
  • Uplink channels e.g., PUCCH, PUSCH
  • signals e.g., Sounding Reference Signal (SRS)
  • SRS Sounding Reference Signal
  • Unified TCI state can be dynamically updated and indicated using MAC CE and/or DCI.
  • the beam indication on a single component carrier can be applied to multiple different CCs.
  • the uplink beam indication can be given simultaneously with the uplink power control parameters through UL TCI state or joint TCI state.
  • the terminal device can use a random access process to obtain the TA.
  • the random access process can include the random access process triggered by the network device and the UE-initiated random access process.
  • the random access process triggered by the network device is triggered by the network device sending a PDCCH order (PDCCH order), and the network device provides sufficient information in the PDCCH order to enable the UE to send PRACH.
  • the UE-initiated random access process is triggered by the timeout of the TA timer on the UE side.
  • FIG7 is a schematic diagram of a four-step random access process.
  • the four-step random access process includes the following steps:
  • Step 1 The terminal device sends a random access preamble (Preamble, also known as Msg 1) to the network device.
  • Preamble also known as Msg 1
  • the terminal device can select a physical random access channel (PRACH) resource.
  • the network device sends random access related parameters to the terminal device through the system information block (SIB), including the reference signal receiving power (RSRP) threshold (rsrp-ThresholdSSB) used to select the appropriate synchronization signal block (SSB).
  • SIB system information block
  • RSRP reference signal receiving power
  • rsrp-ThresholdSSB reference signal receiving power
  • the terminal device compares the RSRP measurement result under each SSB with the rsrp-ThresholdSSB, and selects the SSB with a measurement value higher than the threshold value for access.
  • SSB can also be called synchronization signal/physical broadcast channel block (SS/PBCH block).
  • SS/PBCH block synchronization signal/physical broadcast channel block
  • each SSB corresponds to a set of random access preamble resources and random access opportunity (RACH Occasion, RO) resources.
  • the terminal device sends PRACH according to the Preamble and RO resources corresponding to the selected SSB.
  • Step 2 The network device sends a random access response (Random Access Response, RAR, also known as Msg 2) to the terminal device.
  • RAR Random Access Response
  • the terminal device After the terminal device sends the Preamble to the network device, it can open a random access response window (ra-ResponseWindow), and detect the corresponding physical downlink control channel (Physical Downlink Control Channel, PDCCH) according to the random access radio network temporary identifier (Random Access Radio Network Temporary Identifier, RA-RNTI) in the ra-ResponseWindow. If the terminal device detects the PDCCH scrambled by RA-RNTI, it can obtain the physical downlink shared channel (Physical Downlink Shared Channel, PDSCH) scheduled by the PDCCH. Among them, the PDSCH includes the RAR corresponding to the Preamble.
  • RA-RNTI Random Access Radio Network Temporary Identifier
  • Step 3 the terminal device sends Msg 3.
  • the terminal device After receiving the RAR message, the terminal device determines whether the RAR message belongs to itself. For example, the terminal device can use the preamble code index to check. After determining that it is the RAR message belonging to itself, it can generate Msg 3 at the RRC layer and send Msg 3 to the network device, which needs to carry the identification information of the terminal device.
  • Step 4 The network device sends a contention resolution message (Msg 4) to the terminal device.
  • Msg 4 a contention resolution message
  • the network device sends Msg 4 to the terminal device, and the terminal device correctly receives Msg 4 to complete contention resolution.
  • Msg 4 can carry the RRC connection establishment message.
  • the terminal device After the terminal device sends a PRACH, it receives the RAR sent by the network device in the RAR receiving window. If the terminal device does not receive the RAR, it will send the PRACH again on the next available PRACH resource.
  • the UE when the UE is uplink synchronized with TRP#0 and the UE is out of uplink synchronization with TRP#1, for the random access process triggered by TRP#0, the UE can obtain the TA value corresponding to TRP#0 in the uplink synchronization state, but cannot obtain the TA value corresponding to TRP#1 in the uplink out-of-sync state; for the random access process triggered by the TA timer, the SSB selected by the UE should be sent from the TRP in the uplink out-of-sync state, and should not be sent from the TRP in the uplink synchronization state, but the UE does not know which TRP the SSB comes from, therefore, the UE cannot obtain a suitable TA, which in turn affects the uplink transmission based on multiple TRPs.
  • FIG8 is a schematic interaction diagram of a wireless communication method 200 according to an embodiment of the present application. As shown in FIG8 , the method 200 includes at least part of the following contents:
  • the terminal device receives a first signaling sent by a first network device, where the first signaling is used to instruct (or trigger) the terminal device to initiate a random access process to a target network device, wherein the first signaling includes first indication information, and the first indication information is used to indicate the target network device;
  • the terminal device sends a physical random access channel PRACH to the target network device;
  • the terminal device receives a target timing advance TA value, where the target TA value is the TA value of the terminal device to the target network device.
  • the first network device may be a network device that the terminal device initially accesses, or a network device in an uplink synchronization state.
  • the terminal device has obtained the TA value of the terminal device to the first network device, for example, the terminal device obtains the TA value of the terminal device to the first network device through an initial access process.
  • the first network device is a network device associated with a specific search space, such as a network device associated with a common search space (CSS).
  • a specific search space such as a network device associated with a common search space (CSS).
  • CSS common search space
  • the target network device may be a network device that is about to perform uplink synchronization, or a network device that is in an uplink out-of-sync state. That is, the terminal device has not yet obtained the TA value of the terminal device for the target network device, or the TA value of the terminal device for the target network device has become invalid or expired.
  • each network device may be configured with a TAG, for example, each network device may be configured with a TAG ID. Therefore, the network device is associated with (or corresponds to) the configured TAG ID, and the TA value (i.e., the target TA value) of the network device by the terminal device may be considered to be the TA value associated with (or corresponding to) the TAG ID.
  • each network device may be associated with (or correspond to) a CORESETPoolIndex, and the TA value (ie, target TA value) of the terminal device to the network device may be considered to be the TA value corresponding to the CORESETPoolIndex.
  • the first network device when the first network device schedules the terminal device to send uplink information to multiple network devices, the first network device may trigger the terminal device to initiate random access to the target network device to obtain the target TA value.
  • the multiple network devices include the target network device.
  • the uplink information may include PUSCH and/or PUCCH.
  • the multiple network devices may be multiple network devices within a cell (intra-cell), or multiple network devices between cells (inter-cell).
  • the multiple network devices may be multiple TRPs, and therefore, the embodiment of the present application may be applicable to uplink transmission of multiple TRPs within a cell, or may also be applicable to uplink transmission of multiple TRPs between cells.
  • the terminal device Since the distances from different network devices to the terminal device are different, and there may be large uplink synchronization errors between multiple network devices, the terminal device sends uplink information to multiple network devices based on a unified TA, which will cause uplink desynchronization between the terminal device and the network device. Therefore, it is necessary for the terminal device to obtain the TA value of the network device granularity (such as TRP-specific).
  • the first network device and the target network device are the same network device, or different network devices.
  • the first network device may trigger the terminal device to initiate random access to the first network device to obtain the TA value of the terminal device to the first network device.
  • the first network device may trigger the terminal device to initiate random access to other network devices to obtain the TA value of the terminal device to the other network devices.
  • the first network device may be a network device in a serving cell, or may be a network device in a non-serving cell.
  • the target network device may be a network device in a serving cell, or may be a network device in a non-serving cell.
  • the first network device and the target network device may both be network devices under a service cell, or one may be a network device under a service cell and the other may be a network device under a non-service cell. This application does not limit this.
  • the first network device and the target network device may be TRPs.
  • the first network device is TRP#0 and the target network device is TRP#1.
  • the first network device is TRP#0
  • the target network device is TRP#0.
  • the first signaling may be DCI signaling.
  • the first signaling may be a PDCCH order.
  • the DCI is understood as a PDCCH order.
  • Cell RNTI cell radio network temporary identifier
  • C-RNTI cell radio network temporary identifier
  • FDRA frequency domain resource assignment
  • the first signaling may include parameters used by the terminal device to send PRACH, such as a preamble index (Preamble index), an SSB index (SSB index), a RO (PRACH mask index), etc.
  • Preamble index a preamble index
  • SSB index an SSB index
  • RO PRACH mask index
  • the first signaling may be transmitted through a specific control resource set (Control Resource Set, CORESET), such as CORESET#0, where the default CORESETPoolIndex of CORESET#0 is 0, and the first signaling may also be considered to be transmitted through a specific control resource set pool.
  • CORESET Control Resource Set
  • the first signaling may be transmitted through a specific search space, for example, the first signaling is transmitted through a CSS.
  • the terminal device may determine to initiate random access to the target network device according to the first indication information in the first signaling, and further, may send a PRACH to the target network device.
  • the PRACH is sent using the parameters for sending the PRACH indicated in the first signaling.
  • the terminal device may receive the target TA value.
  • the terminal device may obtain the target TA value through RAR.
  • the target TA value is sent by the second network device to the terminal device.
  • the second network device may be a target network device, or a network device associated with a CSS, or a network device associated with a specific CORESET, such as a network device associated with CORESET#0, or a network device associated with CORESETPoolIndex#0.
  • the terminal device may also send Msg3 to the target network device.
  • the terminal device may also receive Msg4 sent by the second network device.
  • the terminal device may receive Msg4 sent by the target network device, or may receive Msg4 sent by a network device associated with the CSS.
  • the first indication information can directly or indirectly indicate the target network device, and the present application does not limit the specific indication method.
  • the first network device can indicate the target network device through the first information, that is, the first indication information can be used to indicate the first information. Further, the terminal device can determine which network device to initiate random access to based on the first information.
  • the first indication information may be identification information of the target network device, and the terminal device may determine to which network device to initiate random access according to the identification information of the target network device.
  • the first indication information may also indicate, through a bitmap, which network device the terminal device is triggered to initiate random access to.
  • the first indication information may include multiple bits, each bit corresponds to a network device, and the value of each bit is used to indicate whether to trigger the terminal device to initiate random access to the corresponding network device. For example, a bit value of 1 indicates triggering, otherwise it indicates not triggering.
  • the number of the multiple bits is determined based on the maximum number of multiple TRPs in the uplink transmission based on multiple TRPs.
  • the multiple TRPs include 2 TRPs (i.e., TRP#0 and TRP#1), and the multiple bits can be 2 bits, corresponding to TRP#0 and TRP#1 respectively.
  • the bit corresponding to TRP takes a value of 1, it indicates that the terminal device is triggered to initiate random access to the TRP, otherwise, it indicates that the terminal device is not triggered to initiate random access to the TRP.
  • the first indication information is used to indicate a first control resource set pool index (CORESETPoolIndex), and the first control resource set pool index is associated with the target network device, or in other words, the target network device belongs to the control resource set pool identified by the first control resource set pool index.
  • CORESETPoolIndex a first control resource set pool index
  • control resource set pool index is associated with the TAG ID.
  • control resource set pool index and TAG ID can correspond one to one.
  • the association relationship may be predefined or configured by the network device.
  • the TAG ID can also be replaced by other information that can uniquely associate or indicate a network device, and the present application does not limit this.
  • the first CORESETPoolIndex is associated with the first TAG ID, and the first TAG ID is associated with the target network device. Therefore, when the first CORESETPoolIndex and the first TAG ID are associated, and the first TAG ID is associated with the target network device, the first network device can indicate the target network device through the first CORESETPoolIndex.
  • the first network device is TRP#0
  • the target network device is TRP#1
  • TRP#0 is associated with CORESETPoolIndex#0
  • TRP#1 is associated with CORESETPoolIndex#1. Then, TRP#0 associated with CORESETPoolIndex#0 can trigger the terminal device to initiate random access to TRP#1 associated with CORESETPoolIndex of 1.
  • the first signaling includes a first information field, and the first information field can be used to indicate a CORESETPoolIndex associated with the target network device.
  • the value of the first information field is used to indicate a CORESETPoolIndex associated with the network device.
  • the length of the first information field may be determined according to the number of CORESETPoolIndex supported by the terminal device and/or the length of CORESETPoolIndex.
  • the number of CORESETPoolIndex is 2, which are 0 and 1 respectively, and the first information field can be 1 bit.
  • the first information field may be 2 bits.
  • the first information field may be 3 bits.
  • the first information field is used to indicate CORESETPoolIndex, otherwise, the first information field is a reserved field.
  • the CORESETPoolIndex is used to determine the TAG ID to send the PRACH, that is, to which TAG ID associated network device the PRACH is sent.
  • Example 1 in combination with Example 1-1, Example 1-2 and Example 1-3, taking the first signaling as PDCCH order as an example, the specific implementation process of Example 1 is explained.
  • the first network device is TRP#0
  • the target network device is TRP#0.
  • Step 1 TRP#0 sends a PDCCH order to the UE, where the PDCCH order carries the CORESETPoolIndex associated with TRP#0.
  • the PDCCH order also carries parameters for sending PRACH, such as the preamble index, SSB index, RO (PRACH mask index), etc.
  • Step 2 UE sends PRACH to TRP#0 according to CORESETPoolIndex carried by PDCCH order.
  • PRACH is sent to TRP#0 according to the parameters for sending PRACH carried in the PDCCH order.
  • Step 3 TRP#0 sends RAR to UE, where RAR includes the target TA value.
  • TRP#0 can calculate the UE's TA value for TRP#0, that is, the target TA value, based on the arrival time of PRACH.
  • the RAR also includes the CORESETPoolIndex or TAG ID associated with the target TA value, or the CORESETPoolIndex or TAG ID associated with TRP#0.
  • the contention-based four-step random access process may further include the following steps:
  • Step 4 UE sends Msg 3 to TRP#0.
  • Step 5 TRP#0 sends Msg 4 to UE.
  • Embodiment 1-2
  • the first network device is TRP#0 and the target network device is TRP#1.
  • Step 1 TRP#0 sends a PDCCH order to the UE, where the PDCCH order carries the CORESETPoolIndex associated with TRP#1.
  • the PDCCH order also carries parameters for sending PRACH, such as the preamble index, SSB index, RO (PRACH mask index), etc.
  • Step 2 UE sends PRACH to TRP#1 according to CORESETPoolIndex carried by PDCCH order.
  • PRACH is sent to TRP#1 according to the parameters for sending PRACH carried in the PDCCH order.
  • Step 3 TRP#1 sends RAR to UE, where RAR includes the target TA value.
  • TRP#1 can calculate the UE's TA value for TRP#1, that is, the target TA value, based on the arrival time of PRACH.
  • the RAR also includes the CORESETPoolIndex or TAG ID associated with the target TA value, or the CORESETPoolIndex or TAG ID associated with TRP#1.
  • the contention-based four-step random access process may further include the following steps:
  • Step 4 UE sends Msg 3 to TRP#1.
  • Step 5 TRP#1 sends Msg 4 to UE.
  • the RAR is replied by the target network device, that is, the network device to which the terminal device sends the PRACH, and the network device replies to the UE with the RAR, and carries the target TA value in the RAR.
  • the RAR and/or Msg4 are sent by the network device associated with the CSS.
  • Embodiment 1-3
  • the first network device is TRP#0
  • the target network device is TRP#1
  • TRP#0 is the TRP associated with the CSS.
  • Step 1 TRP#0 sends a PDCCH order to the UE, where the PDCCH order carries the CORESETPoolIndex associated with TRP#1.
  • the PDCCH order also carries parameters for sending PRACH, such as the preamble index, SSB index, RO (PRACH mask index), etc.
  • Step 2 UE sends PRACH to TRP#1 according to CORESETPoolIndex carried by PDCCH order.
  • PRACH is sent to TRP#1 according to the parameters for sending PRACH carried in the PDCCH order.
  • TRP#1 can calculate the UE's TA value for TRP#1, that is, the target TA value, based on the arrival time of PRACH.
  • TRP#1 sends the target TA value to TRP#0
  • TRP#0 sends RAR to the UE, where the RAR carries the target TA value.
  • Step 3 TRP#0 sends RAR to the UE, where the RAR includes the target TA value.
  • the RAR also includes the CORESETPoolIndex or TAG ID associated with the target TA value, or the CORESETPoolIndex or TAG ID associated with TRP#1.
  • the contention-based four-step random access process may further include the following steps:
  • Step 4 UE sends Msg 3 to TRP#1.
  • Step 5 TRP#0 sends Msg 4 to UE.
  • the first indication information is used to indicate first spatial information, and the first spatial information is associated with the target network device.
  • the first spatial information may be information related to the spatial domain, for example, information related to a reference signal, information related to a beam, etc.
  • the first signaling may indicate to which network device the PRACH is to be sent by indicating an uplink beam to the terminal device.
  • the first signaling can be used to indicate the spatial filter (Spatial filter) for sending PRACH, that is, the transmit filter of PRACH.
  • the first signaling may also be used to indicate a spatial filter for receiving the RAR, that is, a receiving filter of the RAR.
  • the transmit filter is also called a transmit beam
  • the receive filter is also called a receive beam
  • the spatial information is associated with the TAG ID.
  • the association relationship may be predefined or configured by the network device.
  • the association between the spatial information and the TAG ID can be one-to-one.
  • the TAG ID can also be replaced by other information that can uniquely associate or indicate a network device, and the present application does not limit this.
  • the first spatial information is associated with a first TAG ID
  • the first TAG ID is associated with the target network device. Therefore, when the first spatial information and the first TAG ID are associated, and the first TAG ID is associated with the target network device, the first network device can indicate the target network device through the first spatial information.
  • the first spatial information includes a first TCI state and/or a first spatial relationship (Spatial relation) information.
  • the first TCI state is associated with a first TAG ID, and the first TAG ID is associated with the target network device.
  • the first TCI state is a UL TCI state or a Joint TCI state.
  • the first spatial relationship information is associated with a first TAG ID, and the first TAG ID is associated with the target network device.
  • the transmit beam of the PRACH may be indicated using the first TCI state or the first spatial relationship information.
  • the first TCI state can be used to indicate a reference signal resource index, such as an SSB resource index, a CSI-RS resource index or an SRS resource index, etc. If the first TCI state indicates a downlink reference signal resource index, such as an SSB resource index or a CSI-RS resource index, the terminal device can use the transmit beam corresponding to the receive beam for receiving the reference signal resource indicated by the first TCI state as the transmit beam of the PRACH; or, if the first TCI state indicates an uplink reference signal resource index, such as an SRS resource index, the terminal device can use the transmit beam for receiving the reference signal resource indicated by the first TCI state as the transmit beam of the PRACH.
  • a reference signal resource index such as an SSB resource index, a CSI-RS resource index or an SRS resource index
  • the first spatial relationship information may be used to indicate a reference signal resource index, such as an SSB resource index, a CSI-RS resource index or an SRS resource index, etc. If the first spatial relationship information indicates a downlink reference signal resource index, such as an SSB resource index or a CSI-RS resource index, the terminal device may use the transmit beam corresponding to the receive beam for receiving the reference signal resource indicated by the first spatial relationship information as the transmit beam of the PRACH; or, if the first spatial relationship information indicates an uplink reference signal resource index, such as an SRS resource index, the terminal device may use the transmit beam for receiving the reference signal resource indicated by the first spatial relationship information as the transmit beam of the PRACH.
  • a reference signal resource index such as an SSB resource index, a CSI-RS resource index or an SRS resource index
  • the first signaling may include an SSB resource index for measuring the downlink reference time.
  • the first spatial information when the first spatial information is used to indicate a reference signal resource index (e.g., an SSB index), the first spatial information is used for both downlink reference time measurement and for indicating a transmit beam of a PRACH.
  • the first spatial information may reuse an SSB resource index field in the first signaling.
  • the first signaling further includes:
  • the second indication information is used to indicate the spatial filter used by the terminal device to receive the random access response RAR.
  • the second indication information is used to indicate a second TCI state, wherein the second TCI state is a DL TCI state or a Joint TCI state.
  • the first signaling may include a second information field for indicating the first spatial information.
  • the length of the second information field may be determined according to the number of first spatial information, such as the number of TCI states, the number of spatial relationships, etc.
  • the second information field may be 3 bits, or may be other bit lengths, which is not limited in the present application.
  • the first signaling may include a third information field for indicating the second TCI state.
  • the length of the third information field may be determined according to the number of TCI states, etc.
  • the third information field may be 3 bits, or may be other bit lengths, which is not limited in this application.
  • the first signaling may include the following fields:
  • SS/PBCH index used to indicate the SS/PBCH (i.e., SSB), which is used to determine the RO used to send the PRACH;
  • the second information field is used to indicate the first TCI state or the first Spatial relation
  • the third information field (optional) is used to indicate the second TCI state.
  • the second information field when used to indicate the reference signal resource index, the second information field may be multiplexed with the information bit of the SS/PBCH index to carry it. That is, the second information field may be used to determine to which network device the PRACH is sent, and may also be used to determine the RO resource for sending the PRACH.
  • the second information field is used to indicate the first TCI state or the first Spatial relation, otherwise, the second information field is a reserved field.
  • the third information field is used to indicate the second TCI state, otherwise, the third information field is a reserved field.
  • the first signaling may include a first information field for indicating the first CORESETPoolIndex. Furthermore, the first signaling may also include a second information field for indicating the first TCI state or the first Spatial relation, or may also include a third information field for indicating the second TCI state.
  • the first signaling may include a fourth information field for indicating the first PCI. Further, the first signaling may also include a second information field for indicating the first TCI state or the first Spatial relation, or may also include a third information field for indicating the second TCI state.
  • Example 2 taking the first signaling as PDCCH order as an example, the specific implementation process of Example 2 is explained.
  • the first network device is TRP#0
  • the target network device is TRP#0.
  • Step 1 TRP#0 sends a PDCCH order to the UE, where the PDCCH order carries the spatial information associated with TRP#0, such as TCI status or Spatial relation.
  • the PDCCH order also carries parameters for sending PRACH, such as preamble index, SSB index, RO (PRACH mask index), etc.
  • Step 2 UE sends PRACH to TRP#0 according to the spatial information carried by PDCCH order.
  • the UE can send PRACH to TRP#0 according to the transmit beam indicated by the spatial information.
  • Step 3 TRP#0 sends RAR to UE, where RAR includes the target TA value.
  • TRP#0 can calculate the UE's TA value for TRP#0, that is, the target TA value, based on the arrival time of PRACH.
  • the UE may receive the RAR according to the receive beam of the RAR indicated in the PDCCH order.
  • the RAR also includes the CORESETPoolIndex or TAG ID associated with the target TA value, or the CORESETPoolIndex or TAG ID associated with TRP#0.
  • the contention-based four-step random access process may further include the following steps:
  • Step 4 UE sends Msg 3 to TRP#0.
  • Step 5 TRP#0 sends Msg 4 to UE.
  • the first network device is TRP#0 and the target network device is TRP#1.
  • Step 1 TRP#0 sends a PDCCH order to the UE, where the PDCCH order carries the spatial information associated with TRP#1, such as TCI status or Spatial relation.
  • the PDCCH order also carries parameters for sending PRACH, such as preamble index, SSB index, RO (PRACH mask index), etc.
  • Step 2 UE sends PRACH to TRP#1 according to the spatial information carried by PDCCH order.
  • the UE can send PRACH to TRP#1 according to the transmit beam indicated by the spatial information.
  • Step 3 TRP#1 sends RAR to UE, where RAR includes the target TA value.
  • TRP#1 can calculate the UE's TA value for TRP#1, that is, the target TA value, based on the arrival time of PRACH.
  • the UE may receive the RAR according to the receive beam of the RAR indicated in the PDCCH order.
  • the RAR also includes the CORESETPoolIndex or TAG ID associated with the target TA value, or the CORESETPoolIndex or TAG ID associated with TRP#1.
  • the contention-based four-step random access process may further include the following steps:
  • Step 4 UE sends Msg 3 to TRP#1.
  • Step 5 TRP#1 sends Msg 4 to UE.
  • the RAR is replied by the target network device, that is, the network device to which the terminal device sends the PRACH, and the network device replies the RAR to the UE, and carries the target TA value in the RAR.
  • the RAR and/or Msg4 are sent by the network device associated with the CSS.
  • TRP#0 is the TRP associated with the CSS.
  • Embodiment 2-3 is a diagrammatic representation of Embodiment 2-3.
  • the first network device is TRP#0 and the target network device is TRP#1.
  • Step 1 TRP#0 sends a PDCCH order to the UE, where the PDCCH order carries the spatial information associated with TRP#1.
  • the PDCCH order also carries parameters for sending PRACH, such as preamble index, SSB index, RO (PRACH mask index), etc.
  • Step 2 UE sends PRACH to TRP#1 according to the spatial information carried by PDCCH order.
  • the UE can send PRACH to TRP#1 according to the transmit beam indicated by the spatial information.
  • TRP#1 can calculate the UE's TA value for TRP#1, that is, the target TA value, based on the arrival time of PRACH.
  • TRP#1 sends the target TA value to TRP#0
  • TRP#0 sends RAR to the UE, where the RAR carries the target TA value.
  • Step 3 TRP#0 sends RAR to UE, where RAR includes the target TA value.
  • the UE may receive the RAR according to the receive beam of the RAR indicated in the PDCCH order.
  • the RAR also includes the CORESETPoolIndex or TAG ID associated with the target TA value, or the CORESETPoolIndex or TAG ID associated with TRP#1.
  • the contention-based four-step random access process may further include the following steps:
  • Step 4 UE sends Msg 3 to TRP#1.
  • Step 5 TRP#0 sends Msg 4 to UE.
  • the first indication information is used to indicate a first PCI, wherein the first PCI is associated with a target network device.
  • PCI and TAG ID are associated with each other.
  • the association relationship may be predefined or configured by the network device.
  • PCI and TAG ID can have a one-to-one correspondence.
  • the TAG ID can also be replaced by other information that can uniquely associate or indicate a network device, and the present application does not limit this.
  • the first PCI is associated with the target network device, which may include:
  • the first PCI is associated with the first TAG ID, and the first TAG ID is associated with the target network device; or
  • the first PCI is associated with a first CORESETPoolIndex, and the first CORESETPoolIndex is associated with the target network device.
  • the first network device can indicate the target network device through the first PCI.
  • the first signaling may include a fourth information field, and the fourth information field may be used to indicate a PCI associated with the target network device.
  • the value of the fourth information field is used to indicate a PCI associated with the network device.
  • the length of the fourth information field may be determined according to the length of the PCI and/or the number of PCIs.
  • the fourth information field may be 10 bits, or may be other bit lengths.
  • the target network device may be a network device in a non-serving cell, and the terminal device needs to obtain the corresponding TA value before communicating with the network device in the non-serving cell. Since there are multiple network devices in the alternative non-serving cell, for example, up to 7, the terminal device wirelessly knows in advance which network device it will synchronize uplink with, and in this case, it can be indicated by PCI.
  • the terminal device when the target network device is a network device in a non-service cell, the terminal device needs to measure the reference signal in the non-service cell in advance, such as SSB, perform downlink synchronization, and find a suitable downlink receive beam and a corresponding uplink transmit beam.
  • the reference signal in the non-service cell such as SSB
  • Example 3-3 taking the first signaling as PDCCH order as an example, the specific implementation process of Example 1 is explained.
  • the PCI associated with the first network device is PCI#0
  • the PCI associated with the target network device is PCI#D
  • the first network device is a network device in a service cell
  • the target network device is a network device in a non-service cell.
  • Step 1 The first network device sends a PDCCH order to the UE, wherein the PDCCH order carries PCI#D.
  • the PDCCH order also carries parameters for sending PRACH.
  • Step 2 UE sends PRACH to the target network device according to PCI#D carried by PDCCH order.
  • PRACH is sent to the target network device according to the parameters for sending PRACH carried in the PDCCH order.
  • Step 3 The target network device sends a RAR to the UE, where the RAR includes a target TA value.
  • the target network device may calculate the TA value of the UE to the target network device, that is, the target TA value, according to the arrival time of the PRACH.
  • the RAR also includes the CORESETPoolIndex or TAG ID associated with the target TA value, or the CORESETPoolIndex or TAG ID associated with the target network device.
  • the contention-based four-step random access process may further include the following steps:
  • Step 4 UE sends Msg 3 to the target network device.
  • Step 5 The target network device sends Msg 4 to the UE.
  • the PCI associated with the first network device is PCI#D
  • the PCI associated with the target network device is PCI#D. That is, the first network device and the target network device are the same network device, which is a network device in a non-serving cell.
  • Step 1 The first network device sends a PDCCH order to the UE, where the PDCCH order carries PCI#D.
  • the PDCCH order also carries parameters for sending PRACH.
  • Step 2 The UE sends PRACH to the first network device, i.e. the target network device, according to the PCI#D carried by the PDCCH order.
  • PRACH is sent to the target network device according to the parameters for sending PRACH carried in the PDCCH order.
  • Step 3 The target network device sends a RAR to the UE, where the RAR includes a target TA value.
  • the target network device may calculate the TA value of the UE to the target network device, that is, the target TA value, according to the arrival time of the PRACH.
  • the RAR also includes the CORESETPoolIndex or TAG ID associated with the target TA value, or the CORESETPoolIndex or TAG ID associated with the target network device.
  • the contention-based four-step random access process may further include the following steps:
  • Step 4 UE sends Msg 3 to the target network device.
  • Step 5 The target network device sends Msg 4 to the UE.
  • Embodiment 3-1 and Embodiment 3-2 RAR is replied by the target network device, that is, the network device to which the terminal device sends PRACH, and which network device replies RAR to the UE, and carries the target TA value in the RAR.
  • the target network device that is, the network device to which the terminal device sends PRACH, and which network device replies RAR to the UE, and carries the target TA value in the RAR.
  • RAR and/or Msg4 are sent by the network device associated with the CSS, wherein the network device associated with PCI#0 is the network device associated with the CSS.
  • the PCI associated with the first network device is PCI#0
  • the PCI associated with the target network device is PCI#D
  • the first network device is a network device in a service cell
  • the target network device is a network device in a non-service cell.
  • Step 1 The first network device sends a PDCCH order to the UE, wherein the PDCCH order carries PCI#D.
  • the PDCCH order also carries parameters for sending PRACH.
  • Step 2 UE sends PRACH to the target network device according to PCI#D carried by PDCCH order.
  • PRACH is sent to the target network device according to the parameters for sending PRACH carried in the PDCCH order.
  • the target network device may calculate the TA value of the UE to the target network device, that is, the target TA value, according to the arrival time of the PRACH.
  • the target network device sends the target TA value to the first network device, and the first network device sends the RAR to the UE.
  • Step 3 The first network device sends a RAR to the UE, where the RAR includes a target TA value.
  • the RAR also includes the CORESETPoolIndex or TAG ID associated with the target TA value, or the CORESETPoolIndex or TAG ID associated with the target network device.
  • the contention-based four-step random access process may further include the following steps:
  • Step 4 UE sends Msg 3 to the target network device.
  • Step 5 The first network device sends Msg 4 to the UE.
  • the first network device can trigger the terminal device to initiate random access to the target network device through the first signaling. Further, the terminal device can send PRACH to the target network device, receive a random access response RAR, and obtain the TA value of the terminal device to the target network device from the RAR. Therefore, in an embodiment of the present application, by designing the first signaling, the terminal device can initiate random access to a specific network device, and then obtain the TA of the terminal device to the specific network device, that is, the acquisition of the TA at the granularity of the specific network device is realized, which is conducive to the terminal device obtaining a suitable TA.
  • the target network device may be indicated by CORESETPoolIndex.
  • the target network device is indicated by spatial information such as TCI status or spatial relationship.
  • the target network device is indicated by PCI.
  • FIG. 18 is a schematic flow chart of another wireless communication method 300 according to an embodiment of the present application. As shown in FIG. 18 , the method 300 includes at least part of the following contents:
  • the terminal device sends a physical random access channel PRACH to the target network device based on the target reference signal.
  • the first TA timer is associated with a first TAG ID
  • the target network device is associated with the first TAG ID
  • the target reference signal is a reference signal associated with the target network device selected by the terminal device from multiple candidate reference signals.
  • the first TAG ID may be a TAG ID corresponding to the TAG configured for the target network device.
  • the first TA timer can be a timer configured for the TAG corresponding to the first TAG ID, or called a time alignment timer (TimeAlignmentTimer).
  • the reference signal selected by the terminal device may be sent by a network device in an uplink synchronization state. In this case, the terminal device does not need to initiate random access to the network device.
  • the terminal device can select the reference signal associated with the target network device to which it wants to initiate random access, further determine the PRACH resource corresponding to the reference signal, and then send the PRACH to the target network device based on the PRACH resource.
  • the candidate reference signal may be SSB, CSI-RS or SRS, etc., which is not limited in this application.
  • a plurality of candidate reference signals may be divided into a plurality of reference signal groups, each reference signal group being associated with a network device, wherein each reference signal group includes one or more candidate reference signals.
  • each reference signal group is associated with a network device, including:
  • Each reference signal group is associated with a TAG ID or CORESETPoolIndex, and the TAG ID or CORESETPoolIndex is associated with a network device.
  • the plurality of reference signal groups are predefined, that is, the terminal device and the network device can obtain the grouping information without information exchange.
  • the plurality of reference signal groups are configured by a network device.
  • the method 300 further includes:
  • a terminal device receives first configuration information sent by a first network device, where the first configuration information is used to configure multiple reference signal groups, wherein each reference signal group is associated with a network device, for example, each reference signal group is associated with a TAG ID or CORESETPoolIndex.
  • the first network device may be a network device in an uplink synchronization state, that is, the terminal device and the first network device have performed uplink and downlink synchronization.
  • the first network device is a network device associated with a specific search space, such as a network device associated with a common search space (CSS).
  • a specific search space such as a network device associated with a common search space (CSS).
  • CSS common search space
  • the first configuration information may be carried via RRC signaling, or may be carried via other downlink signaling, which is not limited in this application.
  • the network device can configure a TAG ID or CORESETPoolIndex for it. In this way, by configuring corresponding TAG IDs or CORESETPoolIndex for different reference signals, multiple reference signal groups can be formed, wherein the TAG IDs or CORESETPoolIndex corresponding to the reference signals in each reference signal group are the same.
  • the network device may configure a corresponding set of reference signals for each TAG ID or CORESETPoolIndex. For example, ⁇ SSB#0, SSB#1, ..., SSB#31 ⁇ is configured for TAG ID#0 or CORESETPoolIndex#0, and ⁇ SSB#32, SSB#1, ..., SSB#63 ⁇ is configured for TAG ID#1 or CORESETPoolIndex#1.
  • the multiple reference signal groups are divided according to a preset rule, for example, the multiple candidate reference signals are grouped according to their indexes, that is, the indexes of the reference signals in a reference signal group satisfy a certain relationship.
  • SSBs with even indexes are grouped together, corresponding to TAG ID#0 or CORESETPoolIndex#0; SSBs with odd indexes are grouped together, corresponding to TAG ID#1 or CORESETPoolIndex#1.
  • the SSBs in the first half of the SSB index are grouped together, corresponding to TAG ID#0 or CORESETPoolIndex#0; and the SSBs in the second half of the SSB index are grouped together, corresponding to TAG ID#1 or CORESETPoolIndex#1.
  • the terminal device needs to select a reference signal in the corresponding reference signal group according to the TAG or CORESETPoolIndex corresponding to the first TA timer, for example, select a reference signal in the reference signal group that meets the RSRP threshold value, thereby avoiding selecting a reference signal in the reference signal group corresponding to a network device in an uplink synchronization state.
  • the sending a physical random access channel PRACH to a target network device based on a target reference signal includes:
  • a PRACH resource associated with the target reference signal from preconfigured PRACH resources, such as an RO resource, a Preamble;
  • the PRACH is sent to the target network device using the PRACH resource associated with the target reference signal.
  • the method 300 further includes:
  • the terminal device receives a RAR, where the RAR includes a target TA value.
  • the RAR also includes the CORESETPoolIndex or TAG ID associated with the target TA value, or the CORESETPoolIndex or TAG ID associated with the target network device.
  • the RAR is sent by the second network device to the terminal device.
  • the second network device may be the target network device, or may be a network device associated with a CSS, or a network device associated with a specific CORESET, such as a network device associated with CORESET#0, or a network device associated with CORESETPoolIndex#0.
  • the first network device, the second network device, and the target network device may be TRPs.
  • multiple reference signal groups may include SSB group #0 and SSB group #1, wherein SSB group #0 is associated with TRP #0, SSB group #1 is associated with TRP #1, TRP #0 is associated with the first TAG ID, and the first TAG ID is associated with the first TA timer.
  • Step 1 When the first TA timer times out and uplink data arrives, the UE selects a target SSB in SSB group #0 associated with TRP#0, and further uses the PRACH resources associated with the target SSB to send PRACH to TRP#0.
  • Step 2 TRP#0 sends a RAR to the UE, which includes the target TA value.
  • TRP#0 can calculate the UE's TA value for TRP#1, that is, the target TA value, based on the arrival time of PRACH.
  • the RAR also includes the CORESETPoolIndex or TAG ID associated with the target TA value, or the CORESETPoolIndex or TAG ID associated with TRP#0.
  • the contention-based four-step random access process may further include the following steps:
  • Step 3 UE sends Msg 3 to TRP#0.
  • Step 4 TRP#0 sends Msg 4 to UE.
  • the RAR is replied by the target network device, that is, the terminal device sends PRACH to which network device, and which network device replies RAR to the UE, and carries the target TA value in the RAR.
  • RAR and/or Msg4 are sent by the network device associated with the CSS.
  • TRP#1 is the TRP associated with the CSS.
  • Step 1 When the first TA timer times out and uplink data arrives, the UE selects a target SSB in SSB group #0 associated with TRP#0, and further uses the PRACH resources associated with the target SSB to send PRACH to TRP#0.
  • Step 2 TRP#0 sends a RAR to the UE, which includes the target TA value.
  • TRP#0 can calculate the UE's TA value for TRP#1, that is, the target TA value, based on the arrival time of PRACH.
  • the RAR also includes the CORESETPoolIndex or TAG ID associated with the target TA value, or the CORESETPoolIndex or TAG ID associated with TRP#0.
  • TRP#0 sends the target TA value to TRP#1
  • TRP#1 sends RAR to the UE, where the RAR carries the target TA value.
  • the contention-based four-step random access process may further include the following steps:
  • Step 3 UE sends Msg 3 to TRP#0.
  • Step 4 TRP#1 sends Msg 4 to UE.
  • multiple reference signals can be grouped, and each reference signal group is associated with a network device.
  • the terminal device can select a target reference signal in the reference signal group associated with the network device, and further use the PRACH resources associated with the target reference signal to send PRACH to the target network device, thereby obtaining the TA value corresponding to the target network device.
  • FIG21 shows a schematic block diagram of a terminal device 400 according to an embodiment of the present application.
  • the terminal device 400 includes:
  • the communication unit 410 is used to receive a first signaling sent by a first network device, where the first signaling is used to instruct the terminal device to initiate random access to a target network device, wherein the first signaling includes first indication information, and the first indication information is used to indicate the target network device.
  • the communication unit 410 is further configured to:
  • a random access response RAR is received, where the RAR includes a target timing advance TA value, where the target TA value is a TA value of the terminal device to the target network device.
  • the first indication information is used to indicate a first control resource set pool index, wherein the first control resource pool index is associated with the target network device.
  • the first control resource set pool index is associated with a first timing advance group identifier TAG ID, and the first TAG ID is associated with the target network device.
  • the first indication information is used to indicate first spatial information, wherein the first spatial information is associated with the target network device.
  • the first spatial information is associated with a first TAG ID
  • the first TAG ID is associated with the target network device.
  • the first spatial information is associated with a first control resource set pool index
  • the first control resource set pool index is associated with the target network device.
  • the first spatial information includes a first transmission configuration indication TCI state and/or first spatial relationship information.
  • the first TCI state is associated with a first TAG ID, and the first TAG ID is associated with the target network device; and/or
  • the first spatial relationship information is associated with a first TAG ID, and the first TAG ID is associated with the target network device.
  • the first spatial information is also used to indicate a spatial filter for sending a physical random access channel PRACH by the terminal device.
  • the first spatial information when the first spatial information indicates a synchronization signal block SSB resource index, the first spatial information is also used to indicate a spatial filter for the terminal device to send a PRACH.
  • the first TCI state is an uplink TCI state or a joint TCI state.
  • the first indication information is used to indicate a first physical cell identifier PCI, wherein the first PCI is associated with the target network device.
  • the first PCI is associated with a first TAG ID, and the first TAG ID is associated with the target network device; or
  • the first PCI is associated with a first control resource set pool index, and the first control resource set pool index is associated with the target network device.
  • the first signaling further includes:
  • the second indication information is used to indicate the spatial filter used by the terminal device to receive the random access response RAR.
  • the second indication information is used to indicate a second TCI state, wherein the second TCI state is a downlink TCI state or a joint TCI state.
  • the RAR also includes a first TAG ID or a first control resource pool index, and the first TAG ID or the first control resource pool index is associated with the target network device.
  • the target TA value is associated with the first TAG ID.
  • the target TA value is received from a second network device, where the second network device is the target network device, or a network device associated with a common search space CSS.
  • the target network device and the first network device are the same network device, or the target network device and the first network device are not the same network device.
  • the first network device and the target network device are both network devices in a serving cell; or, the first network device is a network device in a serving cell, and the target network device is a network device in a non-serving cell; or, the first network device is a network device in a non-serving cell, and the target network device is a network device in a non-serving cell.
  • the first signaling is a physical downlink control channel (PDCCH) command.
  • PDCCH physical downlink control channel
  • the first network device is a network device associated with a CSS.
  • the communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system on chip.
  • the processing unit may be one or more processors.
  • terminal device 400 may correspond to the terminal device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the terminal device 400 are respectively for realizing the corresponding processes of the terminal device in the method 200 shown in Figures 8 to 17, which will not be repeated here for the sake of brevity.
  • FIG22 shows a schematic block diagram of a network device 500 according to an embodiment of the present application.
  • the network device 500 includes:
  • the communication unit 510 is used to send a first signaling to a terminal device, where the first signaling is used to instruct the terminal device to initiate random access to a target network device, wherein the first signaling includes first indication information, and the first indication information is used to indicate the target network device.
  • the first indication information is used to indicate a first control resource set pool index, wherein the first control resource pool index is associated with the target network device.
  • the first control resource set pool index is associated with a first timing advance group identifier TAG ID, and the first TAG ID is associated with the target network device.
  • the first indication information is used to indicate first spatial information, wherein the first spatial information is associated with the target network device.
  • the first spatial information is associated with a first TAG ID
  • the first TAG ID is associated with the target network device.
  • the first spatial information is associated with a first control resource set pool index
  • the first control resource set pool index is associated with the target network device.
  • the first spatial information includes a first transmission configuration indication TCI state and/or first spatial relationship information.
  • the first TCI state is associated with a first TAG ID, and the first TAG ID is associated with the target network device; and/or
  • the first spatial relationship information is associated with a first TAG ID, and the first TAG ID is associated with the target network device.
  • the first spatial information is also used to indicate a spatial filter for the terminal device to send a physical random access channel PRACH.
  • the first spatial information when the first spatial information indicates a synchronization signal block SSB resource index, the first spatial information is also used to indicate a spatial filter for the terminal device to send a PRACH.
  • the first TCI state is an uplink TCI state or a joint TCI state.
  • the first indication information is used to indicate a first physical cell identifier PCI, wherein the first PCI is associated with the target network device.
  • the first PCI is associated with a first TAG ID, and the first TAG ID is associated with the target network device; or
  • the first PCI is associated with a first control resource set pool index, and the first control resource set pool index is associated with the target network device.
  • the first signaling further includes:
  • the second indication information is used to indicate the spatial filter used by the terminal device to receive the random access response RAR.
  • the second indication information is used to indicate a second TCI state, wherein the second TCI state is a downlink TCI state or a joint TCI state.
  • the communication unit 510 is further used to: send a RAR to the terminal device, where the RAR includes a target TA value.
  • the RAR also includes a first TAG ID or a first control resource pool index, and the first TAG ID or the first control resource pool index is associated with the target network device.
  • the target TA value is associated with the first TAG ID.
  • the network device is a network device associated with a CSS.
  • the target network device is the network device.
  • the target network device and the network device are not the same network device.
  • the network device and the target network device are both network devices in a serving cell; or, the network device is a network device in a serving cell, and the target network device is a network device in a non-serving cell; or, the network device is a network device in a non-serving cell, and the target network device is a network device in a non-serving cell.
  • the first signaling is a physical downlink control channel (PDCCH) command.
  • PDCCH physical downlink control channel
  • the communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system on chip.
  • the network device 500 may correspond to the first network device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the network device 500 are respectively for implementing the corresponding processes of the first network device in the method 200 shown in Figures 8 to 17. For the sake of brevity, they will not be repeated here.
  • FIG23 shows a schematic block diagram of a network device 800 according to an embodiment of the present application.
  • the network device 800 includes:
  • the communication unit 810 is used to send a random access response RAR to the terminal device, where the RAR includes a target timing advance TA value, wherein the RAR is a response to a physical random access channel PRACH, the receiving end of the PRACH is a target network device, and the sending of the PRACH by the terminal device to the target network device is triggered by the first network device.
  • the RAR also includes a first TAG ID or a first control resource pool index, and the first TAG ID or the first control resource pool index is associated with the target network device.
  • the target TA value is associated with the first TAG ID.
  • the network device is the target network device or a network device associated with a common search space CSS.
  • the first network device is a network device associated with a CSS.
  • the target network device and the first network device are the same network device, or the target network device and the first network device are not the same network device.
  • the first network device and the target network device are both network devices in a serving cell; or
  • the first network device is a network device in a serving cell, and the target network device is a network device in a non-serving cell; or
  • the first network device is a network device in a non-serving cell
  • the target network device is a network device in a non-serving cell.
  • the communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system on chip.
  • the processing unit may be one or more processors.
  • the network device 800 may correspond to the network device in the embodiment of the method of the present application, and the above-mentioned and other operations and/or functions of each unit in the network device 800 are respectively for realizing the corresponding processes of the network device in the method 200 shown in Figures 8 to 17, which will not be repeated here for the sake of brevity.
  • FIG24 shows a schematic block diagram of a terminal device 1000 according to an embodiment of the present application.
  • the terminal device 1000 includes:
  • the communication unit 1010 is configured to, when the first timing advance TA timer expires, the terminal device sends a physical random access channel PRACH to the target network device based on the target reference signal;
  • the first TA timer is associated with a first timing advance group identifier TAG ID
  • the target network device is associated with the first TAG ID
  • the target reference signal is a reference signal associated with the target network device selected by the terminal device from multiple candidate reference signals.
  • the multiple candidate reference signals are divided into multiple reference signal groups, each reference signal group is associated with a network device, and each reference signal group includes one or more candidate reference signals.
  • each reference signal group is associated with a network device, including:
  • Each reference signal group is associated with a TAG ID, and the TAG ID is associated with a network device.
  • the plurality of reference signal groups are predefined or configured by the network device.
  • the network device 1000 further includes:
  • a processing unit configured to select a PRACH resource associated with the target reference signal from preconfigured PRACH resources
  • the communication unit 1010 is further configured to: send a PRACH to the target network device using the PRACH resource associated with the target reference signal.
  • the communication unit 1010 is further used to: receive a random access response sent by the second network device, where the random access response includes a target TA value.
  • the second network device is the target network device, or a network device associated with a common search space CSS.
  • the RAR also includes a first TAG ID or a first control resource pool index, and the first TAG ID or the first control resource pool index is associated with the target network device.
  • the target reference signal comprises a target synchronization channel block SSB.
  • the communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system on chip.
  • the processing unit may be one or more processors.
  • terminal device 1000 may correspond to the terminal device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the terminal device 1000 are respectively for realizing the corresponding processes of the terminal device in the method 300 shown in Figures 18 to 20, which will not be repeated here for the sake of brevity.
  • FIG25 shows a schematic block diagram of a network device 1100 according to an embodiment of the present application.
  • the network device 1100 includes:
  • the communication unit 1110 is used to send first configuration information to the terminal device, wherein the first configuration information is used to configure an association relationship between multiple reference signal groups and multiple network devices, wherein each reference signal group includes one or more candidate reference signals, and the association relationship is used by the terminal device to determine the PRACH resources used to send a physical random access channel PRACH to a target network device.
  • each reference signal group is associated with one network device.
  • each reference signal group is associated with a network device, including:
  • Each reference signal group is associated with a TAG ID, and the TAG ID is associated with a network device.
  • the communication unit 1110 is further used to: send a random access response to the terminal device, where the random access response includes a target TA value.
  • the RAR also includes a first TAG ID or a first control resource pool index, wherein the first TAG ID or the first control resource pool index is associated with a target network device, and the target network device is a network device that initiates random access to the terminal device.
  • the reference signal comprises a synchronization channel block SSB.
  • the communication unit may be a communication interface or a transceiver, or an input/output interface of a communication chip or a system on chip.
  • the processing unit may be one or more processors.
  • the network device 1100 may correspond to the first network device in the method embodiment of the present application, and the above-mentioned and other operations and/or functions of each unit in the network device 1100 are respectively for implementing the corresponding processes of the first network device in the method 300 shown in Figures 18 to 20, which will not be repeated here for the sake of brevity.
  • Fig. 26 is a schematic structural diagram of a communication device 600 provided in an embodiment of the present application.
  • the communication device 600 shown in Fig. 26 includes a processor 610, and the processor 610 can call and run a computer program from a memory to implement the method in the embodiment of the present application.
  • the communication device 600 may further include a memory 620.
  • the processor 610 may call and run a computer program from the memory 620 to implement the method in the embodiment of the present application.
  • the memory 620 may be a separate device independent of the processor 610 , or may be integrated into the processor 610 .
  • the communication device 600 may further include a transceiver 630 , and the processor 610 may control the transceiver 630 to communicate with other devices, specifically, may send information or data to other devices, or receive information or data sent by other devices.
  • the transceiver 630 may include a transmitter and a receiver.
  • the transceiver 630 may further include an antenna, and the number of the antennas may be one or more.
  • the communication device 600 may specifically be the first network device or the second network device of the embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the first network device or the second network device in each method of the embodiment of the present application, which will not be repeated here for the sake of brevity.
  • the communication device 600 may specifically be a mobile terminal/terminal device of an embodiment of the present application, and the communication device 600 may implement the corresponding processes implemented by the mobile terminal/terminal device in each method of the embodiment of the present application, which will not be described in detail here for the sake of brevity.
  • Fig. 27 is a schematic structural diagram of a chip according to an embodiment of the present application.
  • the chip 700 shown in Fig. 27 includes a processor 710, and the processor 710 can call and run a computer program from a memory to implement the method according to the embodiment of the present application.
  • the chip 700 may further include a memory 720.
  • the processor 710 may call and run a computer program from the memory 720 to implement the method in the embodiment of the present application.
  • the memory 720 may be a separate device independent of the processor 710 , or may be integrated into the processor 710 .
  • the chip 700 may further include an input interface 730.
  • the processor 710 may control the input interface 730 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.
  • the chip 700 may further include an output interface 740.
  • the processor 710 may control the output interface 740 to communicate with other devices or chips, and specifically, may output information or data to other devices or chips.
  • the chip can be applied to the first network device or the second network device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the first network device or the second network device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.
  • the chip can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the chip can implement the corresponding processes implemented by the mobile terminal/terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they will not be repeated here.
  • the chip mentioned in the embodiments of the present application can also be called a system-level chip, a system chip, a chip system or a system-on-chip chip, etc.
  • FIG28 is a schematic block diagram of a communication system 900 provided in an embodiment of the present application.
  • the communication system 900 includes a terminal device 910 and a network device 920 .
  • the terminal device 910 can be used to implement the corresponding functions implemented by the terminal device in the above method
  • the network device 920 can be used to implement the corresponding functions implemented by the first network device and/or the second network device in the above method. For the sake of brevity, they will not be repeated here.
  • the processor of the embodiment of the present application may be an integrated circuit chip with signal processing capabilities.
  • each step of the above method embodiment can be completed by the hardware integrated logic circuit in the processor or the instruction in the form of software.
  • the above processor can be a general processor, a digital signal processor (Digital Signal Processor, DSP), an application specific integrated circuit (Application Specific Integrated Circuit, ASIC), a field programmable gate array (Field Programmable Gate Array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components.
  • DSP Digital Signal Processor
  • ASIC Application Specific Integrated Circuit
  • FPGA Field Programmable Gate Array
  • the methods, steps and logic block diagrams disclosed in the embodiments of the present application can be implemented or executed.
  • the general processor can be a microprocessor or the processor can also be any conventional processor, etc.
  • the steps of the method disclosed in the embodiment of the present application can be directly embodied as a hardware decoding processor to perform, or the hardware and software modules in the decoding processor can be combined to perform.
  • the software module can be located in a mature storage medium in the field such as a random access memory, a flash memory, a read-only memory, a programmable read-only memory or an electrically erasable programmable memory, a register, etc.
  • the storage medium is located in the memory, and the processor reads the information in the memory and completes the steps of the above method in combination with its hardware.
  • the memory in the embodiment of the present application can be a volatile memory or a non-volatile memory, or can include both volatile and non-volatile memories.
  • the non-volatile memory can be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory.
  • the volatile memory can be a random access memory (RAM), which is used as an external cache.
  • RAM Direct Rambus RAM
  • SRAM Static RAM
  • DRAM Dynamic RAM
  • SDRAM Synchronous DRAM
  • DDR SDRAM Double Data Rate SDRAM
  • ESDRAM Enhanced SDRAM
  • SLDRAM Synchlink DRAM
  • DR RAM Direct Rambus RAM
  • the memory in the embodiment of the present application may also be static random access memory (static RAM, SRAM), dynamic random access memory (dynamic RAM, DRAM), synchronous dynamic random access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous link dynamic random access memory (synch link DRAM, SLDRAM) and direct memory bus random access memory (Direct Rambus RAM, DR RAM), etc. That is to say, the memory in the embodiment of the present application is intended to include but not limited to these and any other suitable types of memory.
  • An embodiment of the present application also provides a computer-readable storage medium for storing a computer program.
  • the computer-readable storage medium can be applied to the first network device in the embodiment of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the first network device in the various methods of the embodiment of the present application. For the sake of brevity, they are not repeated here.
  • the computer-readable storage medium can be applied to the second network device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the second network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.
  • the computer-readable storage medium can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program enables the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.
  • An embodiment of the present application also provides a computer program product, including computer program instructions.
  • the computer program product may be applied to the first network device in the embodiment of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the first network device in the various methods in the embodiment of the present application, which will not be described in detail here for the sake of brevity.
  • the computer program product can be applied to the second network device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the second network device in the various methods of the embodiments of the present application.
  • the computer program instructions enable the computer to execute the corresponding processes implemented by the second network device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.
  • the computer program product can be applied to the mobile terminal/terminal device in the embodiments of the present application, and the computer program instructions enable the computer to execute the corresponding processes implemented by the mobile terminal/terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.
  • the embodiment of the present application also provides a computer program.
  • the computer program can be applied to the first network device in the embodiment of the present application.
  • the computer program runs on a computer, the computer executes the corresponding processes implemented by the first network device in the various methods of the embodiment of the present application. For the sake of brevity, they are not repeated here.
  • the computer program can be applied to the second network device in the embodiment of the present application.
  • the computer program runs on a computer, the computer executes the corresponding processes implemented by the second network device in the various methods of the embodiment of the present application. For the sake of brevity, they are not repeated here.
  • the computer program can be applied to the mobile terminal/terminal device in the embodiments of the present application.
  • the computer program When the computer program is run on a computer, the computer executes the corresponding processes implemented by the mobile terminal/terminal device in the various methods of the embodiments of the present application. For the sake of brevity, they are not repeated here.
  • the disclosed systems, devices and methods can be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed.
  • Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit.
  • the functions are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium.
  • the technical solution of the present application can be essentially or partly embodied in the form of a software product that contributes to the prior art.
  • the computer software product is stored in a storage medium and includes several instructions for a computer device (which can be a personal computer, server, or network device, etc.) to perform all or part of the steps of the methods described in each embodiment of the present application.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM), random access memory (RAM), disk or optical disk, and other media that can store program codes.

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Abstract

一种无线通信的方法、终端设备和网络设备,该方法包括:终端设备接收第一网络设备发送的第一信令,所述第一信令用于指示所述终端设备向目标网络设备发起随机接入过程,其中,所述第一信令包括第一指示信息,所述第一指示信息用于指示所述目标网络设备;所述终端设备向所述目标网络设备发送物理随机接入信道PRACH;所述终端设备接收随机接入响应RAR,所述RAR包括目标定时提前TA值,所述目标TA值为所述终端设备对所述目标网络设备的TA值。

Description

无线通信的方法、终端设备和网络设备 技术领域
本申请实施例涉及通信领域,具体涉及一种无线通信的方法、终端设备和网络设备。
背景技术
在一些场景中,终端设备可以通过随机接入过程获得初始的定时提前(Timing advance,TA),进一步基于该初始的TA发送上行信道或上行信号。
在一些场景中,考虑支持基于多传输接收点(Transmission Reception Point,TRP)的上行传输。此情况下,终端设备如何获取合适的TA以进行基于多个TRP的上行传输是一项亟需解决的问题。
发明内容
本申请提供了一种无线通信的方法、终端设备和网络设备,有利于终端设备选择到合适的TA。
第一方面,提供了一种无线通信的方法,包括:终端设备接收第一网络设备发送的第一信令,所述第一信令用于指示所述终端设备向目标网络设备发起随机接入过程,其中,所述第一信令包括第一指示信息,所述第一指示信息用于指示所述目标网络设备;所述终端设备向所述目标网络设备发送物理随机接入信道PRACH;所述终端设备接收随机接入响应RAR,所述RAR包括目标定时提前TA值,所述目标TA值为所述终端设备对所述目标网络设备的TA值。
第二方面,提供了一种无线通信的方法,包括:第一网络设备向终端设备发送第一信令,所述第一信令用于指示所述终端设备向目标网络设备发起随机接入过程,其中,所述第一信令包括第一指示信息,所述第一指示信息用于指示所述目标网络设备。
第三方面,提供了一种终端设备,用于执行上述第一方面或其各实现方式中的方法。
具体地,该终端设备包括用于执行上述第一方面或其各实现方式中的方法的功能模块。
第四方面,提供了一种网络设备,用于执行上述第二方面或其各实现方式中的方法。
具体地,该网络设备包括用于执行上述第二方面或其各实现方式中的方法的功能模块。
第五方面,提供了一种终端设备,包括处理器和存储器。该存储器用于存储计算机程序,该处理器用于调用并运行该存储器中存储的计算机程序,执行上述第一方面或其各实现方式中的方法。
第六方面,提供了一种网络设备,包括处理器和存储器。该存储器用于存储计算机程序,该处理器用于调用并运行该存储器中存储的计算机程序,执行上述第二方面或其各实现方式中的方法。
第七方面,提供了一种芯片,用于实现上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
具体地,该芯片包括:处理器,用于从存储器中调用并运行计算机程序,使得安装有该装置的设备执行如上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
第八方面,提供了一种计算机可读存储介质,用于存储计算机程序,该计算机程序使得计算机执行上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
第九方面,提供了一种计算机程序产品,包括计算机程序指令,所述计算机程序指令使得计算机执行上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
第十方面,提供了一种计算机程序,当其在计算机上运行时,使得计算机执行上述第一方面至第二方面中的任一方面或其各实现方式中的方法。
通过上述技术方案,第一网络设备可以通过第一信令触发终端设备向目标网络设备发起随机接入,进一步地,终端设备可以向目标网络设备发送PRACH,接收随机接入响应RAR,从RAR获取终端设备对目标网络设备的TA值,因此,在本申请实施例中,通过设计第一信令可以使得终端设备可以向特定网络设备发起随机接入,进而获得终端设备对特定网络设备的TA,即实现了特定网络设备粒度的TA的获取,有利于终端设备获取到合适的TA。例如,在基于多个TRP的上行传输中,由于多个TRP和终端设备之间的距离不同,使用统一的TA会导致较大的上行同步误差,因此,与终端设备上行同步的TRP可以触发终端设备向其他TRP发起随机接入获取终端设备对其他TRP的TA值,这里在进行上行传输时,终端设备可以使用每个TRP对应的TA值向每个TRP发起上行传输,有利于保证终端设备和每个TRP之间的上行同步。
附图说明
图1是本申请实施例提供的一种通信系统架构的示意性图。
图2是一种用于TA的差分调整的MAC CE的格式示意图。
图3是一种指示TA绝对值的MAC CE的格式示意图。
图4是一种携带TA的MAC RAR信令的格式示意图。
图5是一种下行接收和上行发送的定时提前的示意图。
图6是一种多DCI调度的基于多TRP的上行传输的场景图。
图7是一种四步随机接入过程的示意图。
图8是根据本申请实施例提供的一种无线通信的方法的示意性交互图。
图9是根据本申请一实施例的一种无线通信的方法的示意性交互图。
图10是根据本申请一实施例的另一种无线通信的方法的示意性交互图。
图11是根据本申请一实施例的再一种无线通信的方法的示意性交互图。
图12是根据本申请另一实施例的一种无线通信的方法的示意性交互图。
图13是根据本申请另一实施例的另一种无线通信的方法的示意性交互图。
图14是根据本申请另一实施例的再一种无线通信的方法的示意性交互图。
图15是根据本申请又一实施例的一种无线通信的方法的示意性交互图。
图16是根据本申请又一实施例的另一种无线通信的方法的示意性交互图。
图17是根据本申请又一实施例的再一种无线通信的方法的示意性交互图。
图18是根据本申请实施例提供的另一种无线通信的方法的示意性交互图。
图19是根据本申请一实施例的一种无线通信的方法的示意性交互图。
图20是根据本申请一实施例的一种无线通信的方法的示意性交互图。
图21是根据本申请实施例提供的一种终端设备的示意性框图。
图22是根据本申请实施例提供的一种网络设备的示意性框图。
图23是根据本申请实施例提供的另一种网络设备的示意性框图。
图24是根据本申请实施例提供的另一种终端设备的示意性框图。
图25是根据本申请实施例提供的又一种网络设备的示意性框图。
图26是根据本申请实施例提供的一种通信设备的示意性框图。
图27是根据本申请实施例提供的一种芯片的示意性框图。
图28是根据本申请实施例提供的一种通信系统的示意性框图。
具体实施方式
下面将结合本申请实施例中的附图,对本申请实施例中的技术方案进行描述,显然,所描述的实施例是本申请一部分实施例,而不是全部的实施例。针对本申请中的实施例,本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本申请保护的范围。
本申请实施例的技术方案可以应用于各种通信系统,例如:全球移动通讯(Global System of Mobile communication,GSM)系统、码分多址(Code Division Multiple Access,CDMA)系统、宽带码分多址(Wideband Code Division Multiple Access,WCDMA)系统、通用分组无线业务(General Packet Radio Service,GPRS)、长期演进(Long Term Evolution,LTE)系统、先进的长期演进(Advanced long term evolution,LTE-A)系统、新无线(New Radio,NR)系统、NR系统的演进系统、非授权频谱上的LTE(LTE-based access to unlicensed spectrum,LTE-U)系统、非授权频谱上的NR(NR-based access to unlicensed spectrum,NR-U)系统、非地面通信网络(Non-Terrestrial Networks,NTN)系统、通用移动通信系统(Universal Mobile Telecommunication System,UMTS)、无线局域网(Wireless Local Area Networks,WLAN)、无线保真(Wireless Fidelity,WiFi)、第五代通信(5th-Generation,5G)系统或其他通信系统等。
通常来说,传统的通信系统支持的连接数有限,也易于实现,然而,随着通信技术的发展,移动通信系统将不仅支持传统的通信,还将支持例如,设备到设备(Device to Device,D2D)通信,机器到机器(Machine to Machine,M2M)通信,机器类型通信(Machine Type Communication,MTC),车辆间(Vehicle to Vehicle,V2V)通信,或车联网(Vehicle to everything,V2X)通信等,本申请实施例也可以应用于这些通信系统。
可选地,本申请实施例中的通信系统可以应用于载波聚合(Carrier Aggregation,CA)场景,也可以应用于双连接(Dual Connectivity,DC)场景,还可以应用于独立(Standalone,SA)布网场景。
可选地,本申请实施例中的通信系统可以应用于非授权频谱,其中,非授权频谱也可以认为是共享频谱;或者,本申请实施例中的通信系统也可以应用于授权频谱,其中,授权频谱也可以认为是非共享频谱。
本申请实施例结合网络设备和终端设备描述了各个实施例,其中,终端设备也可以称为用户设备(User Equipment,UE)、接入终端、用户单元、用户站、移动站、移动台、远方站、远程终端、移 动设备、用户终端、终端、无线通信设备、用户代理或用户装置等。
终端设备可以是WLAN中的站点(STATION,STA),可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol,SIP)电话、无线本地环路(Wireless Local Loop,WLL)站、个人数字助理(Personal Digital Assistant,PDA)设备、具有无线通信功能的手持设备、计算设备或连接到无线调制解调器的其它处理设备、车载设备、可穿戴设备、下一代通信系统例如NR网络中的终端设备,或者未来演进的公共陆地移动网络(Public Land Mobile Network,PLMN)网络中的终端设备等。
在本申请实施例中,终端设备可以部署在陆地上,包括室内或室外、手持、穿戴或车载;也可以部署在水面上(如轮船等);还可以部署在空中(例如飞机、气球和卫星上等)。
在本申请实施例中,终端设备可以是手机(Mobile Phone)、平板电脑(Pad)、带无线收发功能的电脑、虚拟现实(Virtual Reality,VR)终端设备、增强现实(Augmented Reality,AR)终端设备、工业控制(industrial control)中的无线终端设备、无人驾驶(self driving)中的无线终端设备、远程医疗(remote medical)中的无线终端设备、智能电网(smart grid)中的无线终端设备、运输安全(transportation safety)中的无线终端设备、智慧城市(smart city)中的无线终端设备或智慧家庭(smart home)中的无线终端设备等。
作为示例而非限定,在本申请实施例中,该终端设备还可以是可穿戴设备。可穿戴设备也可以称为穿戴式智能设备,是应用穿戴式技术对日常穿戴进行智能化设计、开发出可以穿戴的设备的总称,如眼镜、手套、手表、服饰及鞋等。可穿戴设备即直接穿在身上,或是整合到用户的衣服或配件的一种便携式设备。可穿戴设备不仅仅是一种硬件设备,更是通过软件支持以及数据交互、云端交互来实现强大的功能。广义穿戴式智能设备包括功能全、尺寸大、可不依赖智能手机实现完整或者部分的功能,例如:智能手表或智能眼镜等,以及只专注于某一类应用功能,需要和其它设备如智能手机配合使用,如各类进行体征监测的智能手环、智能首饰等。
在本申请实施例中,网络设备可以是用于与移动设备通信的设备,网络设备可以是WLAN中的接入点(Access Point,AP),GSM或CDMA中的基站(Base Transceiver Station,BTS),也可以是WCDMA中的基站(NodeB,NB),还可以是LTE中的演进型基站(Evolutional Node B,eNB或eNodeB),或者中继站或接入点,或者车载设备、可穿戴设备以及NR网络中的网络设备(gNB)或者未来演进的PLMN网络中的网络设备或者NTN网络中的网络设备等。
作为示例而非限定,在本申请实施例中,网络设备可以具有移动特性,例如网络设备可以为移动的设备。可选地,网络设备可以为卫星、气球站。例如,卫星可以为低地球轨道(low earth orbit,LEO)卫星、中地球轨道(medium earth orbit,MEO)卫星、地球同步轨道(geostationary earth orbit,GEO)卫星、高椭圆轨道(High Elliptical Orbit,HEO)卫星等。可选地,网络设备还可以为设置在陆地、水域等位置的基站。
在本申请实施例中,网络设备可以为小区提供服务,终端设备通过该小区使用的传输资源(例如,频域资源,或者说,频谱资源)与网络设备进行通信,该小区可以是网络设备(例如基站)对应的小区,小区可以属于宏基站,也可以属于小小区(Small cell)对应的基站,这里的小小区可以包括:城市小区(Metro cell)、微小区(Micro cell)、微微小区(Pico cell)、毫微微小区(Femto cell)等,这些小小区具有覆盖范围小、发射功率低的特点,适用于提供高速率的数据传输服务。
示例性的,本申请实施例应用的通信系统100如图1所示。该通信系统100可以包括网络设备110,网络设备110可以是与终端设备120(或称为通信终端、终端)通信的设备。网络设备110可以为特定的地理区域提供通信覆盖,并且可以与位于该覆盖区域内的终端设备进行通信。
图1示例性地示出了一个网络设备和两个终端设备,可选地,该通信系统100可以包括多个网络设备并且每个网络设备的覆盖范围内可以包括其它数量的终端设备,本申请实施例对此不做限定。
可选地,该通信系统100还可以包括网络控制器、移动管理实体等其他网络实体,本申请实施例对此不作限定。
应理解,本申请实施例中网络/系统中具有通信功能的设备可称为通信设备。以图1示出的通信系统100为例,通信设备可包括具有通信功能的网络设备110和终端设备120,网络设备110和终端设备120可以为上文所述的具体设备,此处不再赘述;通信设备还可包括通信系统100中的其他设备,例如网络控制器、移动管理实体等其他网络实体,本申请实施例中对此不做限定。
应理解,本文中术语“系统”和“网络”在本文中常被可互换使用。本文中术语“和/或”,仅仅是一种描述关联对象的关联关系,表示可以存在三种关系,例如,A和/或B,可以表示:单独存在A,同时存在A和B,单独存在B这三种情况。另外,本文中字符“/”,一般表示前后关联对象是一种“或”的关系。
应理解,在本申请的实施例中提到的“指示”可以是直接指示,也可以是间接指示,还可以是表示具有关联关系。举例说明,A指示B,可以表示A直接指示B,例如B可以通过A获取;也可以表示A间接指示B,例如A指示C,B可以通过C获取;还可以表示A和B之间具有关联关系。
在本申请实施例的描述中,术语“对应”可表示两者之间具有直接对应或间接对应的关系,也可以表示两者之间具有关联关系,也可以是指示与被指示、配置与被配置等关系。
本申请实施例中,"预定义"可以通过在设备(例如,包括终端设备和网络设备)中预先保存相应的代码、表格或其他可用于指示相关信息的方式来实现,本申请对于其具体的实现方式不做限定。比如预定义可以是指协议中定义的。
本申请实施例中,所述"协议"可以指通信领域的标准协议,例如可以包括LTE协议、NR协议以及应用于未来的通信系统中的相关协议,本申请对此不做限定。
为便于理解本申请实施例的技术方案,对本申请相关的定时提前(Timing advance,TA)进行说明。
在一些场景中,在一个小区组(cell group,CG)中,UE可以被配置最多4个定时提前组(Timing Advance Group,TAG)。TAG可以通过无线资源控制(Radio Resource Control,RRC)配置。可选地,一个CG可以包括多个服务小区(serving cell),且每一个服务小区都会被分配一个TAG标识(Timing Advance Group Identity,TAG-Id)。每一个TAG都会有一个时间对准定时器(TimeAlignmentTimer),UE进行该时间对准定时器的计时。当这个该定时器超时时,UE会认为该TAG上行失步。当网络设备在该定时器运行期间,通过媒体接入控制控制元素(Media Access Control Control Element,MAC CE)或其他信令来调整TA值,才会重置该定时器,UE认为该TAG处于上行同步状态。举例来说,如果TimeAlignmentTimer的值配置为500ms,也就是说,网络设备需要在500ms内更新(调整)一次UE的TA值,否则的话,UE可以认为上行失步,并有可能在上行数据到达时,发起随机接入过程。
在一些场景中,可以根据如下公式计算UE的TA,UE的TA是以UE收到下行信道的第一径,即信道所在的时隙的第一个符号为下行参考,在此基础上进行提前发射:
(N TA+N TA,offset)*T C
在一个CG中,每一个服务小区都可以预先配置一个定时提前偏移(TA offset),例如,通过高层参数(n-TimingAdvanceOffset)配置,即公式中的N TA,offset。其中,TA调整量(N TA)是在预先配置的TA offset的基础上进行的。T C为NR系统中的最小时间单位,T C=1/(4096*480kHz)。N TA可以由网络设备的MAC CE来提供差分式的调整,即本次TA调整(new)是在上次(old)TA基础上,在时间上向前或向后调整的,计算公式如下:
Figure PCTCN2022132346-appb-000001
用于TA的差分调整的MAC CE格式如图2所示,其中,TA的调整是在上次TA的基础上调整T A个最小时间单位,且该TA调整的粒度为TAG。
在另一些场景中,网络设备可以向UE指示用于上行传输的TA绝对值。例如网络设备可以通过图3所示的MAC CE命令直接指示TA绝对值N TA,它的取值范围是0到3846,长度为12bits,则根据公式N TA=T A*16*64*2 μ可以确定TA的指示范围。并且该MAC CE命令适用于对应的MAC实体所对应的主定时提前组(Primary Timing Advance Group,PTAG),即该PTAG的定义是包含特殊小区(SpCell)。因为该MAC CE仅适用于PTAG,因此它不需要包含TAG-Id。
在一些场景中,UE在初始接入(小区)的过程中,当UE发送了物理随机接入信道(Physical Random Access Channel,PRACH)给网络设备后,UE在一定的时间窗口内期望网络设备通过媒体接入控制随机接入响应(Media Access Control Random Access Response,MAC RAR)给UE一个TA的指示,图4示出了一种携带TA的MAC RAR信令的格式。该UE基于该MAC RAR可以得到一个初始的TA绝对值,为12个bits。
如果UE工作在单TRP(Single TRP,sTRP)的模式下,那么UE的定时提前的参考点是以下行接收时间点算起,向前提前(N TA+N TA,offset)*T C的时间来发送上行信道或上行信号,如图5所示。
在一些场景中,支持基于多TRP(multi-TRP,mTRP)的物理上行控制信道(Physical Uplink Control Channel,PUCCH)或物理上行共享信道(Physical Uplink Shared Channel,PUSCH)的重复传输(repetition),其目的是增强上行的覆盖和传输的可靠性。UE需要向不同的TRP发送承载相同内容的PUCCH或PUSCH。对于支持基于单下行控制信息(Single Downlink Control Information,DCI,sDCI)sDCI的多PUSCH(multi-PUSCH)的重复传输,UE可以使用一个TA来顺序发送PUSCH到不同的 TRP;对于基于多DCI(multi-DCI,mDCI)的multi-PUSCH的重复传输,由于多个TRP之间可能没有足够理想的回程(backhaul)作为连接,多个TRP都对UE进行的独立调度,这种操作有可能引起对于不同TRP的PUSCH/PUCCH在时间上的重叠,因此也需要针对不同的TRP来支持不同的TA更新或指示。
在一些场景中,考虑支持UE的多个天线面板同时向多个TRP传输PUCCH/PUSCH的机制。但同样地,虽然在多上行发射天线面板和多TRP接收的配置下,UE在一个服务小区内也仅能使用一个TA来做提前发送。这样的限制显然应该被打破,即支持TRP-specific的TA获取和指示。
举例来说,在小区内mDCI-mTRP的场景下,TRP#1和TRP#2使用相同的PCI,如图6所示。每个TRP可以通过各自的DCI来调度该TRP上的PDSCH/PUSCH传输。值得注意的是,在mDCI-mTRP的操作中,将控制资源集(Control Resource Set,CORESET)通过RRC参数控制资源集池索引(CORESETPoolIndex)进行分组。例如,CORESETPoolIndex为“0”的CORESET分为一组,对应一个TRP;CORESETPoolIndex为“1”的CORESET分为另一组,对应另外一个TRP。当网络设备没有为CORESET配置CORESETPoolIndex的时候,其默认值为“0”。
在小区间(inter-cell)mDCI-mTRP的场景下,图6中的TRP#1可以被理解为参考TRP,即UE初始接入时接入的TRP,UE已经取得了上下行同步,它有一个专属的物理小区标识(Physical Cell Identifier,PCI)#1;而对于其他的TRP,由于网络设备可以从最多7个TRP中选择一个TRP来额外地为UE进行上行传输的服务,这些TRP具有与服务TRP不同的PCI,且往往未与UE提前建立上下行的同步。
在一些场景中,提出了传输配置指示(Transmission Configuration Indicator,TCI)状态(state)的概念,用于下行的空间域准共址(Quasi-co-located,QCL)(波束)指示,以及时域频域的QCL信息的传递。具体来说,准共址(QCL)关系可以简单描述为从一个源参考信号指向一个目标参考信号的大尺度衰落的关系。对于波束指示来说,当UE在从网络设备得到两个源参考信号和目标参考信号的QCL关系后,在对目标参考信号的接收时可以使用之前接收源参考信号的接收波束。
在一些场景中,TCI state的指示机制仅适用于下行的信道和信号。为了上行的波束指示定义了空间关系(Spatial relation)的概念,用来表达2个参考信号之间的空间关系。
在一些场景中,为了给通信系统提供一个统一的上下行波束管理机制,在TCI state的设计基础上,提出了统一(unified)TCI state的概念,它增加的重要功能举例如下:
1、设计了3种unified TCI state的模式,其中,联合(joint)TCI state(joint TCI state)适用于上下行的信道和信号;下行(Downlink,DL)TCI state仅适用于下行的信道和信号;上行(Uplink,DL)TCI state仅适用于上行的信道和信号。
2、下行信道(部分物理下行控制信道(Physical Downlink Control Channel,PDCCH),物理下行共享信道(Physical Downlink Shared Channel,PDSCH))和信号(非周期信道状态信息参考信号(Channel State Information Reference Signal,CSI-RS))使用相同的下行发射波束,例如,使用DL TCI state或joint TCI state。
3、上行信道(例如PUCCH,PUSCH)和信号(例如,探测参考信号(Sounding Reference Signal,SRS))使用相同的上行发射波束,使用UL TCI state或joint TCI state。
4、Unified TCI state可以使用MAC CE和/或DCI动态更新和指示。
5、适用于载波聚合的场景,单成员载波(Component carrier,CC)上的波束指示可以适用于多个不同的CC。
6、上行的波束指示可以和上行的功率控制参数通过UL TCI state或joint TCI state同时给出。
7、支持小区间的波束管理功能。
在一些场景中,终端设备可以采用随机接入过程来获取TA。随机接入过程可以包括网络设备触发的和UE自发的随机接入过程。例如,网络设备触发的随机接入过程是以网络设备发送PDCCH命令(PDCCH order)来触发的,网络设备在该PDCCH order中提供足够的信息以使UE进行PRACH发送。UE自发的是以UE侧的TA定时器超时为必要的触发条件。
如图7所示是一种四步随机接入过程的示意性图。四步随机接入过程包括如下步骤:
步骤1,终端设备向网络设备发送随机接入前导码(Preamble,也即Msg 1)。
具体而言,终端设备可以选择物理随机接入信道(Physical Random Access Channel,PRACH)资源。网络设备通过系统信息块(System Information Block,SIB)向终端设备发送随机接入相关参数,其中包括用于选择合适的同步信号块(Synchronization Signal Block,SSB)的参考信号接收功率(Reference Signal Receiving Power,RSRP)门限值(rsrp-ThresholdSSB)。终端设备将每个SSB下的RSRP测量结果与rsrp-ThresholdSSB进行对比,选择测量值高于门限值的SSB进行接入。
需要说明的是,SSB也可以称为同步信号/物理广播信道块(synchronization signal/physical broadcast channel block,SS/PBCH block)。
其中,每个SSB对应一组随机接入前导码(Preamble)资源和随机接入时机(RACH Occasion,RO)资源,终端设备根据选择的SSB对应的Preamble和RO资源发送PRACH。
步骤2,网络设备向终端设备发送随机接入响应(Random Access Response,RAR,也即Msg 2)。
终端设备向网络设备发送Preamble后,可以开启一个随机接入响应窗口(ra-ResponseWindow),在该ra-ResponseWindow内根据随机访问无线网络临时标识符(Random Access Radio Network Temporary Identifier,RA-RNTI)检测对应的物理下行控制信道(Physical Downlink Control Channel,PDCCH)。若终端设备检测到RA-RNTI加扰的PDCCH后,可以获得该PDCCH调度的物理下行共享信道(Physical Downlink Shared Channel,PDSCH)。其中,该PDSCH中包括Preamble对应的RAR。
步骤3,终端设备发送Msg 3。
终端设备在收到RAR消息后,判断该RAR是否为属于自己的RAR消息,例如终端设备可以利用前导码索引进行核对,在确定是属于自己的RAR消息后,可以在RRC层产生Msg 3,并向网络设备发送Msg 3,其中需要携带终端设备的标识信息等。
步骤4,网络设备向终端设备发送冲突解决消息(contention resolution),即Msg 4。
网络设备向终端设备发送Msg 4,终端设备正确接收Msg 4完成竞争解决(Contention Resolution)。例如在RRC连接建立过程中,Msg 4中可以携带RRC连接建立消息。
在随机接入过程中,终端设备发送一个PRACH之后,在RAR接收窗口接收网络设备发送的RAR。当终端设备没有收到RAR,则会在下一个可用的PRACH资源上再次发送PRACH。
综上,当UE与TRP#0上行同步,UE和TRP#1上行失步时,对于TRP#0触发的随机接入过程,UE可以获得处于上行同步状态的TRP#0对应的TA值,但不能获取处于上行失步状态的TRP#1对应的TA值;对于基于TA定时器触发的随机接入过程,UE选择的SSB应该从上行失步的TRP发出的,而不应该是从处于上行同步状态的TRP发出的,但是UE并不知道SSB来自哪个TRP,因此,导致UE不能获得合适的TA,进而影响基于多TRP的上行传输。
为便于理解本申请实施例的技术方案,以下通过具体实施例详述本申请的技术方案。以上相关技术作为可选方案与本申请实施例的技术方案可以进行任意结合,其均属于本申请实施例的保护范围。本申请实施例包括以下内容中的至少部分内容。
图8是根据本申请实施例的无线通信的方法200的示意性交互图,如图8所示,该方法200包括如下至少部分内容:
S210,终端设备接收第一网络设备发送的第一信令,所述第一信令用于指示(或者说,触发)所述终端设备向目标网络设备发起随机接入过程,其中,所述第一信令包括第一指示信息,所述第一指示信息用于指示所述目标网络设备;
S220,所述终端设备向所述目标网络设备发送物理随机接入信道PRACH;
S230,所述终端设备接收目标定时提前TA值,所述目标TA值为所述终端设备对所述目标网络设备的TA值。
在一些实施例中,第一网络设备可以是终端设备初始接入的网络设备,或者,处于上行同步状态的网络设备。终端设备已获得终端设备对第一网络设备的TA值,例如,终端设备通过初始接入过程获得该终端设备对第一网络设备的TA值。
在一些实施例中,第一网络设备是与特定搜索空间关联的网络设备,例如与公共搜索空间(common search space,CSS)关联的网络设备。
在一些实施例中,目标网络设备可以是将要进行上行同步的网络设备,或者,处于上行失步状态的网络设备。也即,终端设备还未获得该终端设备对目标网络设备的TA值,或者,该终端设备对目标网络设备的TA值已失效,或已过期。
在一些实施例中,每个网络设备可以配置一个TAG,例如,每个网络设备配置一个TAG ID。因此,网络设备和配置的TAG ID关联(或者说,对应),则该终端设备对网络设备的TA值(即目标TA值)可以认为是TAG ID关联(或者说,对应)的TA值。
在一些实施例中,每个网络设备可以关联(或者说,对应)一个CORESETPoolIndex,则该终端设备对网络设备的TA值(即目标TA值)可以认为是CORESETPoolIndex对应的TA值。
在一些实施例中,在第一网络设备调度终端设备向多个网络设备发送上行信息时,第一网络设备可以触发终端设备向目标网络设备发起随机接入以获取所述目标TA值。其中,所述多个网络设备包括所述目标网络设备。可选地,该上行信息可以包括PUSCH和/或PUCCH。
可选地,该多个网络设备可以是一个小区内(intra-cell)的多个网络设备,或者,也可以是小区 间(inter-cell)的多个网络设备。例如,该多个网络设备可以是多个TRP,因此,本申请实施例可以适用于小区内的多TRP的上行传输,或者,也适用于小区间的多TRP的上行传输。
由于不同的网络设备到终端设备的距离不同,并且,多个网络设备之间可能存在较大的上行同步误差,终端设备基于统一的TA向多个网络设备发送上行信息,会导致终端设备和网络设备之间的上行失步,因此,终端设备有必要获取网络设备粒度(例如TRP-specific)的TA值。
在一些实施例中,第一网络设备和目标网络设备是同一网络设备,或者,是不同的网络设备。
例如,第一网络设备可以触发终端设备向第一网络设备发起随机接入以获取终端设备对第一网络设备的TA值。
又例如,第一网络设备可以触发终端设备向其他网络设备发起随机接入以获取终端设备对其他网络设备的TA值。
在一些实施例中,第一网络设备可以是服务小区(serving cell)下的网络设备,或者,也可以是非服务小区(non-serving cell)下的网络设备。
在一些实施例中,目标网络设备可以是服务小区下的网络设备,或者,也可以是非服务小区下的网络设备。
可选地,在第一网络设备和目标网络设备不是同一网络设备的情况下,第一网络设备和网络设备可以都是服务小区下的网络设备,或者,一个是服务小区下的网络设备,另一个是非服务小区下的网络设备,本申请对此不作限定。
在一些实施例中,第一网络设备和目标网络设备可以是TRP。
例如,第一网络设备是TRP#0,目标网络设备是TRP#1。
又例如,第一网络设备是TRP#0,目标网络设备是TRP#0。
在一些实施例中,第一信令可以是DCI信令。
在一些实施例中,第一信令可以是PDCCH命令(order)。
例如,在DCI格式1_0是被小区无线网络临时标识(Cell RNTI,C-RNTI)加扰且频域资源分配(Frequency domain resource assignment,FDRA)域是全1时,该DCI理解为一个PDCCH order。
在一些实施例中,该第一信令可以包括用于终端设备发送PRACH的参数,例如前导码索引(Preamble index),SSB索引(SSB index),RO(PRACH掩码索引(PRACH mask index))等。
在一些实施例中,第一信令可以通过特定控制资源集(Control Resource Set,CORESET)传输的,例如CORESET#0,其中,CORESET#0的默认CORESETPoolIndex为0,则也可以认为第一信令是通过特定控制资源集池传输的。
在一些实施例中,第一信令可以通过特定搜索空间传输的,例如第一信令是通过CSS传输的。
在一些实施例中,在接收到第一网络设备发送的第一信令后,终端设备可以根据第一信令中的第一指示信息,确定向目标网络设备发起随机接入,进一步地,可以向目标网络设备发送PRACH。例如,使用第一信令中指示的用于发送PRACH的参数发送所述PRACH。
进一步地,终端设备可以接收目标TA值。例如,终端设备可以通过RAR获取目标TA值。
在一些实施例中,目标TA值是第二网络设备发送给终端设备的。
可选地,该第二网络设备可以是目标网络设备,或者,可以是CSS关联的网络设备,或者,与特定CORESET关联的网络设备。例如与CORESET#0关联的网络设备,或,CORESETPoolIndex#0关联的网络设备。
在一些实施例中,对于四步的随机接入过程,终端设备还可以向目标网络设备发送Msg3。
进一步地,终端设备还可以接收第二网络设备发送的Msg4。
例如,终端设备可以接收目标网络设备发送的Msg4,或者,也可以接收与CSS关联的网络设备发送的Msg4。
应理解,在本申请实施例中,第一指示信息可以直接或间接指示目标网络设备,本申请对于具体的指示方式不作限定。
例如,若第一信息可以唯一确定一个网络设备,则第一网络设备可以通过第一信息指示目标网络设备,即第一指示信息可以用于指示第一信息,进一步地,终端设备可以根据第一信息确定向哪个网络设备发起随机接入。
可选地,第一指示信息可以为目标网络设备的标识信息,终端设备可以根据目标网络设备的标识信息确定向哪个网络设备发起随机接入。
在一些实施例中,第一指示信息也可以通过比特映射(bitmap)方式指示触发终端设备向哪个网络设备发起随机接入。
作为示例,第一指示信息可以包括多个比特,每个比特对应一个网络设备,每个比特的取值用于 指示是否触发终端设备向对应的网络设备发起随机接入,比如比特的取值为1表示触发,否则表示不触发。
可选地,该多个比特的数量根据基于多TRP的上行传输中的多个TRP的最大数量确定。
比如,该多个TRP包括2个TRP(即TRP#0和TRP#1),该多个比特可以为2个比特,分别对应TRP#0和TRP#1,则当TRP对应的比特取值为1时,表示触发终端设备向该TRP发起随机接入,否则,表示不触发终端设备向该TRP发起随机接入。
以下,结合具体实施例,说明第一指示信息的具体实现。
实施例1
在该实施例1中,第一指示信息用于指示第一控制资源集池索引(CORESETPoolIndex),第一控制资源池索引与目标网络设备关联,或者说,目标网络设备属于第一控制资源集池索引所标识的控制资源集池。
可选地,在该实施例1中,控制资源集池索引与TAG ID具有关联关系。
可选地,该控制资源集池索引与TAG ID可以是一一对应的。
可选地,该关联关系可以是预定义的,或者,网络设备配置的。
应理解,本申请实施例中,上述关联关系中,TAG ID也可以替换为能够唯一关联或指示网络设备的其他信息,本申请对此不作限定。
在一些实施例中,第一CORESETPoolIndex和第一TAG ID关联,第一TAG ID与目标网络设备关联。因此,在第一CORESETPoolIndex和第一TAG ID具有关联关系,第一TAG ID与目标网络设备具有关联关系的情况下,第一网络设备可以通过第一CORESETPoolIndex指示目标网络设备。
在一些实施例中,第一网络设备为TRP#0,目标网络设备为TRP#1,TRP#0关联CORESETPoolIndex#0,TRP#1关联CORESETPoolIndex#1,则关联CORESETPoolIndex#0的TRP#0可以触发终端设备向关联CORESETPoolIndex为1的TRP#1发起随机接入。
在一些实施例中,第一信令中包括第一信息域,所述第一信息域可以用于指示目标网络设备关联的CORESETPoolIndex。
可选地,第一信息域的取值用于指示网络设备关联的CORESETPoolIndex。
可选地,第一信息域的长度可以根据终端设备支持的CORESETPoolIndex的个数和/或CORESETPoolIndex的长度确定。
例如,CORESETPoolIndex的个数为2,分别为0和1,则第一信息域可以为1比特。
又例如,若CORESETPoolIndex的个数为4,分别为0~3,则第一信息域可以为2比特。
再例如,若CORESETPoolIndex的个数为8,分别为0~7,则第一信息域可以为3比特。
可选地,在随机接入前导码索引不全为零,第一信息域用于指示CORESETPoolIndex,否则,该第一信息域为预留域。其中,该CORESETPoolIndex用于确定发送PRACH的TAG ID。即向哪个TAG ID关联的网络设备发送PRACH。
以下,结合实施例1-1,实施例1-2和实施例1-3,以第一信令为PDCCH order为例,说明该实施例1的具体实现过程。
实施例1-1:
在该实施例1-1中,第一网络设备为TRP#0,目标网络设备为TRP#0。
如图9所示,可以包括如下步骤:
步骤1:TRP#0向UE发送PDCCH order,其中,该PDCCH order携带TRP#0关联的CORESETPoolIndex。该PDCCH order中还携带用于发送PRACH的参数,例如前导码索引(Preamble index),SSB索引(SSB index),RO(PRACH掩码索引(PRACH mask index))等。
步骤2:UE根据PDCCH order携带的CORESETPoolIndex向TRP#0发送PRACH。
具体地,根据PDCCH order中携带的用于发送PRACH的参数向TRP#0发送PRACH。
步骤3:TRP#0向UE发送RAR,其中,RAR包括目标TA值。
例如,TRP#0可以根据PRACH的到达时间,计算UE对该TRP#0的TA值,即目标TA值。
可选地,该RAR还包括目标TA值关联的CORESETPoolIndex或TAG ID,或者说,TRP#0关联的CORESETPoolIndex或TAG ID。
可选地,对于基于竞争的四步随机接入过程,还可以包括如下步骤:
步骤4:UE向TRP#0发送Msg 3。
步骤5:TRP#0向UE发送Msg 4。
实施例1-2:
在该实施例1-2中,第一网络设备为TRP#0,目标网络设备为TRP#1。
如图10所示,可以包括如下步骤:
步骤1:TRP#0向UE发送PDCCH order,其中,该PDCCH order携带TRP#1关联的CORESETPoolIndex。该PDCCH order中还携带用于发送PRACH的参数,例如前导码索引(Preamble index),SSB索引(SSB index),RO(PRACH掩码索引(PRACH mask index))等。
步骤2:UE根据PDCCH order携带的CORESETPoolIndex向TRP#1发送PRACH。
具体地,根据PDCCH order中携带的用于发送PRACH的参数向TRP#1发送PRACH。
步骤3:TRP#1向UE发送RAR,其中,RAR包括目标TA值。
例如,TRP#1可以根据PRACH的到达时间,计算UE对该TRP#1的TA值,即目标TA值。
可选地,该RAR还包括目标TA值关联的CORESETPoolIndex或TAG ID,或者说,TRP#1关联的CORESETPoolIndex或TAG ID。
可选地,对于基于竞争的四步随机接入过程,还可以包括如下步骤:
步骤4:UE向TRP#1发送Msg 3。
步骤5:TRP#1向UE发送Msg 4。
需要说明的是,在上述实施例1-1和实施例1-2中,RAR是由目标网络设备回复的,即终端设备向哪个网络设备发送PRACH,哪个网络设备向UE回复RAR,同时在该RAR中携带目标TA值。与实施例1-1和实施例1-2不同的是,在实施例1-3中,RAR和/或Msg4是由与CSS关联的网络设备发送的。
实施例1-3:
在该实施例1-3中,第一网络设备为TRP#0,目标网络设备为TRP#1,TRP#0是与CSS关联的TRP。
如图11所示,可以包括如下步骤:
步骤1:TRP#0向UE发送PDCCH order,其中,该PDCCH order携带TRP#1关联的CORESETPoolIndex。该PDCCH order中还携带用于发送PRACH的参数,例如前导码索引(Preamble index),SSB索引(SSB index),RO(PRACH掩码索引(PRACH mask index))等。
步骤2:UE根据PDCCH order携带的CORESETPoolIndex向TRP#1发送PRACH。
具体地,根据PDCCH order中携带的用于发送PRACH的参数向TRP#1发送PRACH。
可选地,TRP#1可以根据PRACH的到达时间,计算UE对该TRP#1的TA值,即目标TA值。
进一步,TRP#1将该目标TA值发送给TRP#0,由TRP#0向UE发送RAR,其中,该RAR携带该目标TA值。
步骤3:TRP#0向UE发送RAR,其中,RAR包括目标TA值。
可选地,该RAR还包括目标TA值关联的CORESETPoolIndex或TAG ID,或者说,TRP#1关联的CORESETPoolIndex或TAG ID。
可选地,对于基于竞争的四步随机接入过程,还可以包括如下步骤:
步骤4:UE向TRP#1发送Msg 3。
步骤5:TRP#0向UE发送Msg 4。
实施例2
在该实施例2中,第一指示信息用于指示第一空间信息,该第一空间信息与目标网络设备关联。
可选地,该第一空间信息可以是空间域相关的信息,例如,与参考信号相关的信息,与波束相关的信息等。
例如,第一信令可以通过向终端设备指示上行波束的方式来指示向哪个网络设备发送PRACH。
在一些实施例中,第一信令可以用于指示发送PRACH的空间滤波器(Spatial filter),即PRACH的发射滤波器。
在一些实施例中,第一信令还可以用于指示接收RAR的空间滤波器,即RAR的接收滤波器。
在本申请实施例中,发射滤波器或称发射波束,接收滤波器或称接收波束。
可选地,在该实施例2中,空间信息与TAG ID具有关联关系。
可选地,该关联关系可以是预定义的,或者,网络设备配置的。
可选地,该空间信息和TAG ID的关联关系可以是一一对应的。
应理解,本申请实施例中,上述关联关系中,TAG ID也可以替换为能够唯一关联或指示网络设备的其他信息,本申请对此不作限定。
在一些实施例中,所述第一空间信息和第一TAG ID关联,所述第一TAG ID与所述目标网络设备关联。因此,在第一空间信息和第一TAG ID具有关联关系,第一TAG ID与目标网络设备具有关联关系的情况下,第一网络设备可以通过第一空间信息指示目标网络设备。
在一些实施例中,第一空间信息包括第一TCI状态和/或第一空间关系(Spatial relation)信息。
在一些实施例中,所述第一TCI状态和第一TAG ID关联,所述第一TAG ID与所述目标网络设备关联。可选地,所述第一TCI状态为UL TCI状态或Joint TCI状态。
在一些实施例中,所述第一空间关系信息和第一TAG ID关联,所述第一TAG ID与所述目标网络设备关联。
在一些实施例中,可以利用第一TCI状态或第一空间关系信息指示PRACH的发射波束。
例如,第一TCI状态可以用于指示参考信号资源索引,例如SSB资源索引,CSI-RS资源索引或SRS资源索引等。若第一TCI状态指示的是下行参考信号资源索引,例如SSB资源索引或CSI-RS资源索引,终端设备可以将接收该第一TCI状态所指示的参考信号资源的接收波束对应的发射波束作为PRACH的发射波束;或者,若第一TCI状态指示的是上行参考信号资源索引,例如SRS资源索引,终端设备可以将接收该第一TCI状态所指示的参考信号资源的发射波束作为PRACH的发射波束。
又例如,第一空间关系信息可以用于指示参考信号资源索引,例如,SSB资源索引,CSI-RS资源索引或SRS资源索引等。若第一空间关系信息指示的是下行参考信号资源索引,例如SSB资源索引或CSI-RS资源索引,终端设备可以将接收该第一空间关系信息所指示的参考信号资源的接收波束对应的发射波束作为PRACH的发射波束;或者,若第一空间关系信息指示的是上行参考信号资源索引,例如SRS资源索引,终端设备可以将接收该第一空间关系信息所指示的参考信号资源的发射波束作为PRACH的发射波束。
在一些实施例中,第一信令中可以包括SSB资源索引,用于下行参考时间的测量。
在一些实施例中,当第一空间信息用于指示参考信号资源索引(例如SSB索引)时,该第一空间信息既用于下行参考时间的测量,又用于指示PRACH的发射波束。可选地,此情况下,第一空间信息可以复用第一信令中的SSB资源索引字段。
在一些实施例中,所述第一信令还包括:
第二指示信息,用于指示所述终端设备接收随机接入响应RAR所使用的空间滤波器。
例如,所述第二指示信息用于指示第二TCI状态,其中,所述第二TCI状态为DL TCI状态或Joint TCI状态。
在一些实施例中,第一信令可以包括第二信息域,用于指示第一空间信息。
可选地,第二信息域的长度可以根据第一空间信息的个数,例如TCI状态的个数,空间关系的个数等确定。
作为一个示例,第二信息域可以为3比特,或者,也可以为其他比特长度,本申请对此不作限定。
在一些实施例中,第一信令可以包括第三信息域,用于指示第二TCI状态。
可选地,第三信息域的长度可以根据TCI状态的个数等确定。
作为一个示例,第三信息域可以为3比特,或者,也可以为其他比特长度,本申请对此不作限定。
在一些实施例中,第一信令可以包括如下字段:
SS/PBCH index,用于指示SS/PBCH(即SSB),该SS/PBCH用于确定用于发送PRACH的RO;
第二信息域,用于指示第一TCI状态或第一Spatial relation;
第三信息域(可选),用于指示第二TCI状态。
可选地,在第二信息域用于指示参考信号资源索引时,第二信息域可以复用SS/PBCH index的信息比特来承载。即,第二信息域可以用于确定向哪个网络设备发送PRACH,还可以用于确定发送PRACH的RO资源。
可选地,在随机接入前导码索引不全为零时,第二信息域用于指示第一TCI状态或第一Spatial relation,否则,该第二信息域为预留域。
可选地,在随机接入前导码索引不全为零时,第三信息域用于指示第二TCI状态,否则,该第三信息域为预留域。
应理解,该实施例2中的PRACH的发射波束以及RAR的接收波束的指示方式也可以适用于实施例1以及后续的实施例3。
例如,在实施例1中,第一信令中可以包括第一信息域,用于指示第一CORESETPoolIndex,进一步地,第一信令中还可以包括第二信息域,用于指示第一TCI状态或第一Spatial relation,或者,也可以包括第三信息域,用于指示第二TCI状态。
又例如,在实施例3中,第一信令中可以包括第四信息域,用于指示第一PCI,进一步地,第一信令中还可以包括第二信息域,用于指示第一TCI状态或第一Spatial relation,或者,也可以包括第三信息域,用于指示第二TCI状态。
以下,结合实施例2-1,实施例2-2和实施例2-3,以第一信令为PDCCH order为例,说明该实施例2的具体实现过程。
实施例2-1:
在该实施例2-1中,第一网络设备为TRP#0,目标网络设备为TRP#0。
如图12所示,可以包括如下步骤:
步骤1:TRP#0向UE发送PDCCH order,其中,该PDCCH order携带TRP#0关联的空间信息,例如TCI状态或Spatial relation。该PDCCH order中还携带用于发送PRACH的参数,例如前导码索引(Preamble index),SSB索引(SSB index),RO(PRACH掩码索引(PRACH mask index))等。
步骤2:UE根据PDCCH order携带的空间信息向TRP#0发送PRACH。
可选地,UE可以根据该空间信息指示的发射波束向TRP#0发送PRACH。
步骤3:TRP#0向UE发送RAR,其中,RAR包括目标TA值。
例如,TRP#0可以根据PRACH的到达时间,计算UE对该TRP#0的TA值,即目标TA值。
可选地,该UE可以根据PDCCH order中指示的RAR的接收波束来接收RAR。
可选地,该RAR还包括目标TA值关联的CORESETPoolIndex或TAG ID,或者说,TRP#0关联的CORESETPoolIndex或TAG ID。
可选地,对于基于竞争的四步随机接入过程,还可以包括如下步骤:
步骤4:UE向TRP#0发送Msg 3。
步骤5:TRP#0向UE发送Msg 4。
实施例2-2:
在该实施例2-2中,第一网络设备为TRP#0,目标网络设备为TRP#1。
如图13所示,可以包括如下步骤:
步骤1:TRP#0向UE发送PDCCH order,其中,该PDCCH order携带TRP#1关联的空间信息,例如TCI状态或Spatial relation。该PDCCH order中还携带用于发送PRACH的参数,例如前导码索引(Preamble index),SSB索引(SSB index),RO(PRACH掩码索引(PRACH mask index))等。
步骤2:UE根据PDCCH order携带的空间信息向TRP#1发送PRACH。
可选地,UE可以根据该空间信息指示的发射波束向TRP#1发送PRACH。
步骤3:TRP#1向UE发送RAR,其中,RAR包括目标TA值。
例如,TRP#1可以根据PRACH的到达时间,计算UE对该TRP#1的TA值,即目标TA值。
可选地,该UE可以根据PDCCH order中指示的RAR的接收波束来接收RAR。
可选地,该RAR还包括目标TA值关联的CORESETPoolIndex或TAG ID,或者说,TRP#1关联的CORESETPoolIndex或TAG ID。
可选地,对于基于竞争的四步随机接入过程,还可以包括如下步骤:
步骤4:UE向TRP#1发送Msg 3。
步骤5:TRP#1向UE发送Msg 4。
需要说明的是,在上述实施例2-1和实施例2-2中,RAR是由目标网络设备回复的,即终端设备向哪个网络设备发送PRACH,哪个网络设备向UE回复RAR,同时在该RAR中携带目标TA值。与实施例2-1和实施例2-2不同的是,在实施例2-3中,RAR和/或Msg4是由与CSS关联的网络设备发送的。其中,TRP#0是与CSS关联的TRP。
实施例2-3:
在该实施例1-3中,第一网络设备为TRP#0,目标网络设备为TRP#1。
如图14所示,可以包括如下步骤:
步骤1:TRP#0向UE发送PDCCH order,其中,该PDCCH order携带TRP#1关联的空间信息。该PDCCH order中还携带用于发送PRACH的参数,例如前导码索引(Preamble index),SSB索引(SSB index),RO(PRACH掩码索引(PRACH mask index))等。
步骤2:UE根据PDCCH order携带的空间信息向TRP#1发送PRACH。
可选地,UE可以根据该空间信息指示的发射波束向TRP#1发送PRACH。
可选地,TRP#1可以根据PRACH的到达时间,计算UE对该TRP#1的TA值,即目标TA值。
进一步地,TRP#1将该目标TA值发送给TRP#0,由TRP#0向UE发送RAR,其中,该RAR携带目标TA值。
步骤3:TRP#0向UE发送RAR,其中,RAR包括目标TA值。
可选地,该UE可以根据PDCCH order中指示的RAR的接收波束来接收RAR。
可选地,该RAR还包括目标TA值关联的CORESETPoolIndex或TAG ID,或者说,TRP#1关联的CORESETPoolIndex或TAG ID。
可选地,对于基于竞争的四步随机接入过程,还可以包括如下步骤:
步骤4:UE向TRP#1发送Msg 3。
步骤5:TRP#0向UE发送Msg 4。
实施例3
在该实施例3中,第一指示信息用于指示第一PCI,其中,所述第一PCI与目标网络设备关联。
在该实施例3中,PCI与TAG ID具有关联关系。
可选地,该关联关系可以是预定义的,或者,网络设备配置的。
可选地,PCI与TAG ID可以是一一对应的关系。
应理解,本申请实施例中,上述关联关系中,TAG ID也可以替换为能够唯一关联或指示网络设备的其他信息,本申请对此不作限定。
在一些实施例中,所述第一PCI与所述目标网络设备关联,可以包括:
第一PCI和第一TAG ID关联,第一TAG ID与目标网络设备关联;或
第一PCI和第一CORESETPoolIndex关联,第一CORESETPoolIndex与目标网络设备关联。
因此,在第一PCI和第一TAG ID或第一CORESETPoolIndex具有关联关系,第一TAG ID或第一CORESETPoolIndex与目标网络设备具有关联关系的情况下,第一网络设备可以通过第一PCI指示目标网络设备。
在一些实施例中,第一信令中可以包括第四信息域,所述第四信息域可以用于指示目标网络设备关联的PCI。
可选地,第四信息域的取值用于指示网络设备关联的PCI。
可选地,第四信息域的长度可以根据PCI的长度和/或PCI的个数确定。
作为示例,第四信息域可以是10比特,或者,也可以是其他比特长度。
在一些实施例中,目标网络设备可以是非服务小区下的网络设备,终端设备在与非服务小区下的网络设备进行通信之前,需要先获取对应的TA值。由于备选的非服务小区下的网络设备有多个,例如最多有7个,终端设备无线提前获知将要与哪个网络设备进行上行同步,此情况下可以通过PCI进行指示。
在一些实施例中,在目标网络设备是非服务小区下的网络设备时,终端设备需要提前测量过非服务小区下的参考信号,例如SSB,进行了下行的同步,并找到了合适的下行接收波束以及对应的上行发射波束。
以下,结合实施例3-1,实施例3-2和实施例3-3,以第一信令为PDCCH order为例,说明该实施例1的具体实现过程。
实施例3-1:
在该实施例3-1中,第一网络设备关联的PCI为PCI#0,目标网络设备关联的PCI为PCI#D,第一网络设备是服务小区下的网络设备,目标网络设备是非服务小区下的网络设备。
如图15所示,可以包括如下步骤:
步骤1:第一网络设备向UE发送PDCCH order,其中,该PDCCH order携带PCI#D。该PDCCH order中还携带用于发送PRACH的参数。
步骤2:UE根据PDCCH order携带的PCI#D向目标网络设备发送PRACH。
具体地,根据PDCCH order中携带的用于发送PRACH的参数向目标网络设备发送PRACH。
步骤3:目标网络设备向UE发送RAR,其中,RAR包括目标TA值。
例如,目标网络设备可以根据PRACH的到达时间,计算UE对该目标网络设备的TA值,即目标TA值。
可选地,该RAR还包括目标TA值关联的CORESETPoolIndex或TAG ID,或者说,目标网络设备关联的CORESETPoolIndex或TAG ID。
可选地,对于基于竞争的四步随机接入过程,还可以包括如下步骤:
步骤4:UE向目标网络设备发送Msg 3。
步骤5:目标网络设备向UE发送Msg 4。
实施例3-2:
在该实施例3-2中,第一网络设备关联的PCI为PCI#D,目标网络设备关联的PCI为PCI#D。即第一网络设备和目标网络设备为同一网络设备,该网络设备为非服务小区下的网络设备。
如图16所示,可以包括如下步骤:
步骤1:第一网络设备向UE发送PDCCH order,该PDCCH order携带PCI#D。该PDCCH order中还携带用于发送PRACH的参数。
步骤2:UE根据PDCCH order携带的PCI#D向第一网络设备即目标网络设备发送PRACH。
具体地,根据PDCCH order中携带的用于发送PRACH的参数向目标网络设备发送PRACH。
步骤3:目标网络设备向UE发送RAR,其中,RAR包括目标TA值。
例如,目标网络设备可以根据PRACH的到达时间,计算UE对该目标网络设备的TA值,即目标TA值。
可选地,该RAR还包括目标TA值关联的CORESETPoolIndex或TAG ID,或者说,目标网络设备关联的CORESETPoolIndex或TAG ID。
可选地,对于基于竞争的四步随机接入过程,还可以包括如下步骤:
步骤4:UE向目标网络设备发送Msg 3。
步骤5:目标网络设备向UE发送Msg 4。
需要说明的是,在上述实施例3-1和实施例3-2中,RAR是由目标网络设备回复的,即终端设备向哪个网络设备发送PRACH,哪个网络设备向UE回复RAR,同时在该RAR中携带目标TA值,与实施例3-1和实施例3-2不同的是,在实施例3-3中,RAR和/或Msg4是由与CSS关联的网络设备发送的,其中,PCI#0关联的网络设备是与CSS关联的网络设备。
实施例3-3:
在该实施例3-3中,第一网络设备关联的PCI为PCI#0,目标网络设备关联的PCI为PCI#D,第一网络设备是服务小区下的网络设备,目标网络设备是非服务小区下的网络设备。
如图17所示,可以包括如下步骤:
步骤1:第一网络设备向UE发送PDCCH order,其中,该PDCCH order携带PCI#D。该PDCCH order中还携带用于发送PRACH的参数。
步骤2:UE根据PDCCH order携带的PCI#D向目标网络设备发送PRACH。
具体地,根据PDCCH order中携带的用于发送PRACH的参数向目标网络设备发送PRACH。
例如,目标网络设备可以根据PRACH的到达时间,计算UE对该目标网络设备的TA值,即目标TA值。
进一步地,目标网络设备将该目标TA值发送给第一网络设备,由第一网络设备向UE发送RAR。
步骤3:第一网络设备向UE发送RAR,其中,RAR包括目标TA值。
可选地,该RAR还包括目标TA值关联的CORESETPoolIndex或TAG ID,或者说,目标网络设备关联的CORESETPoolIndex或TAG ID。
可选地,对于基于竞争的四步随机接入过程,还可以包括如下步骤:
步骤4:UE向目标网络设备发送Msg 3。
步骤5:第一网络设备向UE发送Msg 4。
因此,在本申请实施例中,第一网络设备可以通过第一信令触发终端设备向目标网络设备发起随机接入,进一步地,终端设备可以向目标网络设备发送PRACH,接收随机接入响应RAR,从RAR获取终端设备对目标网络设备的TA值,因此,在本申请实施例中,通过设计第一信令可以使得终端设备可以向特定网络设备发起随机接入,进而获得终端设备对特定网络设备的TA,即实现了特定网络设备粒度的TA的获取,有利于终端设备获取到合适的TA。
例如,可以通过CORESETPoolIndex指示目标网络设备。
又例如,通过空间信息例如TCI状态或空间关系指示目标网络设备。
再例如,通过PCI指示目标网络设备。
图18是根据本申请实施例的另一种无线通信的方法300的示意性流程图,如图18所示,该方法300包括如下至少部分内容:
S310,在第一定时提前TA定时器超时的情况下,终端设备基于目标参考信号向目标网络设备发送物理随机接入信道PRACH。
其中,所述第一TA定时器与第一TAG ID关联,所述目标网络设备与所述第一TAG ID关联,所述目标参考信号是所述终端设备在多个候选参考信号中选择的所述目标网络设备关联的参考信号。
在一些实施例中,第一TAG ID可以是给目标网络设备配置的TAG对应的TAG ID。
在一些实施例中,第一TA定时器可以是给第一TAG ID对应的TAG配置的定时器,或称时间校准定时器(TimeAlignmentTimer)。
如前所述,在相关技术中,终端设备在选择参考信号时,并不知道该参考信号是哪个网络设备发送的,因此,可能导致终端设备选择的参考信号是处于上行同步状态的网络设备发送的,此情况下, 终端设备并不必向该网络设备发起随机接入。
在本申请实施例中,通过将参考信号与网络设备关联,这样,终端设备在发起随机接入时,可以选择想要发起随机接入的目标网络设备关联的参考信号,进一步确定该参考信号对应的PRACH资源,然后基于该PRACH资源向目标网络设备发送PRACH。
在一些实施例中,候选参考信号可以是SSB,CSI-RS或SRS等,本申请对此不作限定。
应理解,本申请并不限定建立参考信号和网络设备之间的关联关系的具体方式。
在一些实施例中,可以将多个候选参考信号分为多个参考信号组,每个参考信号组关联一个网络设备,其中,每个参考信号组包括一个或多个候选参考信号。
可选地,所述每个参考信号组关联一个网络设备,包括:
每个参考信号组关联一个TAG ID或CORESETPoolIndex,所述TAG ID或CORESETPoolIndex关联一个网络设备。
在一些实施例中,所述多个参考信号组是预定义的。即终端设备和网络设备不需要进行信息交互即可获知该分组信息。
在一些实施例中,所述多个参考信号组是网络设备配置的。
例如,如图18所示,所述方法300还包括:
S301,终端设备接收第一网络设备发送的第一配置信息,所述第一配置信息用于配置多个参考信号组,其中每个参考信号组关联一个网络设备,例如每个参考信号组关联一个TAG ID或CORESETPoolIndex。
在一些实施例中,第一网络设备可以是处于上行同步状态的网络设备,即终端设备和第一网络设备已经进行了上下行同步。
在一些实施例中,第一网络设备是与特定搜索空间关联的网络设备,例如与公共搜索空间(common search space,CSS)关联的网络设备。
在一些实施例中,第一配置信息可以通过RRC信令承载,或者,也可以通过其他下行信令承载,本申请对此不作限定。
在一些实现方式中,对于每个参考信号,网络设备可以为其配置一个TAG ID或CORESETPoolIndex,这样,通过为不同的参考信号配置对应的TAG ID或CORESETPoolIndex,从而可以形成多个参考信号组,其中每个参考信号组中的参考信号对应的TAG ID或CORESETPoolIndex相同。
在另一些实现方式中,网络设备可以为每个TAG ID或CORESETPoolIndex配置对应的一组参考信号。例如,对于TAG ID#0或CORESETPoolIndex#0配置{SSB#0,SSB#1,…,SSB#31},对于TAG ID#1或CORESETPoolIndex#1配置{SSB#32,SSB#1,…,SSB#63}。
在又一些实现方式中,多个参考信号组是按照预设规则划分的,例如,根据候选参考信号的索引对多个候选参考信号进行分组,也就是说,一个参考信号组中的参考信号的索引满足一定的关系。
作为示例,索引为偶数的SSB分为一组,对应TAG ID#0或CORESETPoolIndex#0;索引为奇数的SSB分为一组,对应TAG ID#1或CORESETPoolIndex#1。
作为另一示例,前一半SSB index的SSB分为一组,对应TAG ID#0或CORESETPoolIndex#0;后一半SSB index的SSB分为一组,对应TAG ID#1或CORESETPoolIndex#1。
因此,在第一TA定时器超时后,终端设备需要根据该第一TA定时器对应的TAG或CORESETPoolIndex来选择对应参考信号组中的参考信号,例如,选择该参考信号组中的满足RSRP门限值的参考信号,从而能够避免选择到处于上行同步状态的网络设备对应的参考信号组中的参考信号。
在一些实施例中,所述基于目标参考信号向目标网络设备发送物理随机接入信道PRACH,包括:
在预配置的PRACH资源中选择所述目标参考信号关联的PRACH资源,例如RO资源,Preamble;
使用所述目标参考信号关联的PRACH资源向所述目标网络设备发送PRACH。
在一些实施例中,所述方法300还包括:
所述终端设备接收RAR,所述RAR包括目标TA值。
可选地,该RAR还包括目标TA值关联的CORESETPoolIndex或TAG ID,或者说,目标网络设备关联的CORESETPoolIndex或TAG ID。
在一些实施例中,RAR是第二网络设备发送给终端设备的。
可选地,该第二网络设备可以是所述目标网络设备,或者,可以是CSS关联的网络设备,或者,与特定CORESET关联的网络设备。例如与CORESET#0关联的网络设备,或,CORESETPoolIndex#0关联的网络设备。
在一些实施例中,第一网络设备,第二网络设备,目标网络设备可以是TRP。
以下,结合图19和图20,说明该方法300的具体实现过程。
在图19和图20的示例中,多个参考信号组可以包括SSB组#0和SSB组#1,其中,SSB组#0关联TRP#0,SSB组#1关联TRP#1,TRP#0关联第一TAG ID,第一TAG ID关联第一TA定时器。
如图19所示,可以包括如下步骤:
步骤1:在第一TA定时器超时,并且又上行数据到达时,UE在TRP#0关联的SSB组#0选择目标SSB,进一步地,使用目标SSB关联的PRACH资源向TRP#0发送PRACH。
步骤2:TRP#0向UE发送RAR,该RAR包括目标TA值。
可选地,TRP#0可以根据PRACH的到达时间,计算UE对该TRP#1的TA值,即目标TA值。
可选地,该RAR还包括目标TA值关联的CORESETPoolIndex或TAG ID,或者说,TRP#0关联的CORESETPoolIndex或TAG ID。
可选地,对于基于竞争的四步随机接入过程,还可以包括如下步骤:
步骤3:UE向TRP#0发送Msg 3。
步骤4:TRP#0向UE发送Msg 4。
需要说明的是,在图19的示例中,RAR是由目标网络设备回复的,即终端设备向哪个网络设备发送PRACH,哪个网络设备向UE回复RAR,同时在该RAR中携带目标TA值。在图20的示例中,RAR和/或Msg4是由与CSS关联的网络设备发送的。其中,TRP#1是与CSS关联的TRP。
如图20所示,可以包括如下步骤:
步骤1:在第一TA定时器超时,并且又上行数据到达时,UE在TRP#0关联的SSB组#0选择目标SSB,进一步地,使用目标SSB关联的PRACH资源向TRP#0发送PRACH。
步骤2:TRP#0向UE发送RAR,该RAR包括目标TA值。
可选地,TRP#0可以根据PRACH的到达时间,计算UE对该TRP#1的TA值,即目标TA值。
可选地,该RAR还包括目标TA值关联的CORESETPoolIndex或TAG ID,或者说,TRP#0关联的CORESETPoolIndex或TAG ID。
进一步地,TRP#0将该目标TA值发送给TRP#1,由TRP#1向UE发送RAR,其中,该RAR携带目标TA值。
可选地,对于基于竞争的四步随机接入过程,还可以包括如下步骤:
步骤3:UE向TRP#0发送Msg 3。
步骤4:TRP#1向UE发送Msg 4。
综上,在本申请实施例中,可以将多个参考信号进行分组,每个参考信号组关联一个网络设备,这样,在网络设备关联的TAG ID对应的TA定时器超时时,终端设备可以在网络设备关联的参考信号组中选择目标参考信号,进一步使用该目标参考信号关联的PRACH资源向目标网络设备发送PRACH,从而获取目标网络设备对应的TA值。
上文结合图8至图20,详细描述了本申请的方法实施例,下文结合图21至图28,详细描述本申请的装置实施例,应理解,装置实施例与方法实施例相互对应,类似的描述可以参照方法实施例。
图21示出了根据本申请实施例的终端设备400的示意性框图。如图21所示,该终端设备400包括:
通信单元410,用于接收第一网络设备发送的第一信令,所述第一信令用于指示所述终端设备向目标网络设备发起随机接入,其中,所述第一信令包括第一指示信息,所述第一指示信息用于指示所述目标网络设备。
在一些实施例中,所述通信单元410还用于:
向所述目标网络设备发送物理随机接入信道PRACH;
接收随机接入响应RAR,所述RAR包括目标定时提前TA值,所述目标TA值为所述终端设备对所述目标网络设备的TA值。
在一些实施例中,所述第一指示信息用于指示第一控制资源集池索引,其中,所述第一控制资源池索引与所述目标网络设备关联。
在一些实施例中,所述第一控制资源集池索引和第一定时提前组标识TAG ID关联,所述第一TAG ID与所述目标网络设备关联。
在一些实施例中,所述第一指示信息用于指示第一空间信息,其中,所述第一空间信息与所述目标网络设备关联。
在一些实施例中,所述第一空间信息和第一TAG ID关联,所述第一TAG ID与所述目标网络设 备关联。
在一些实施例中,所述第一空间信息和第一控制资源集池索引关联,所述第一控制资源集池索引与所述目标网络设备关联。
在一些实施例中,所述第一空间信息包括第一传输配置指示TCI状态和/或第一空间关系信息。
在一些实施例中,所述第一TCI状态和第一TAG ID关联,所述第一TAG ID与所述目标网络设备关联;和/或
所述第一空间关系信息和第一TAG ID关联,所述第一TAG ID与所述目标网络设备关联。
在一些实施例中,所述第一空间信息还用于指示所述终端设备发送物理随机接入信道PRACH的空间滤波器。
在一些实施例中,在所述第一空间信息指示同步信号块SSB资源索引的情况下,所述第一空间信息还用于指示所述终端设备发送PRACH的空间滤波器。
在一些实施例中,所述第一TCI状态为上行TCI状态或联合TCI状态。
在一些实施例中,所述第一指示信息用于指示第一物理小区标识PCI,其中,所述第一PCI与所述目标网络设备关联。
在一些实施例中,所述第一PCI和第一TAG ID关联,所述第一TAG ID与所述目标网络设备关联;或者
所述第一PCI和第一控制资源集池索引关联,所述第一控制资源集池索引与所述目标网络设备关联。
在一些实施例中,所述第一信令还包括:
第二指示信息,用于指示所述终端设备接收随机接入响应RAR所使用的空间滤波器。
在一些实施例中,所述第二指示信息用于指示第二TCI状态,其中,所述第二TCI状态为下行TCI状态或联合TCI状态。
在一些实施例中,所述RAR还包括第一TAG ID或第一控制资源集池索引,所述第一TAG ID或所述第一控制资源集池索引与所述目标网络设备关联。
在一些实施例中,所述目标TA值与所述第一TAG ID关联。
在一些实施例中,所述目标TA值是从第二网络设备接收的,所述第二网络设备为所述目标网络设备,或者,公共搜索空间CSS关联的网络设备。
在一些实施例中,所述目标网络设备和所述第一网络设备是同一网络设备,或,所述目标网络设备和所述第一网络设备不是同一网络设备。
在一些实施例中,在目标网络设备和所述第一网络设备不是同一网络设备的情况下,
所述第一网络设备和所述目标网络设备均为服务小区下的网络设备;或者,所述第一网络设备是服务小区下的网络设备,所述目标网络设备是非服务小区下的网络设备;或者,所述第一网络设备是非服务小区下的网络设备,所述目标网络设备是非服务小区下的网络设备。
在一些实施例中,所述第一信令为物理下行控制信道PDCCH命令。
在一些实施例中,所述第一网络设备是与CSS关联的网络设备。
可选地,在一些实施例中,上述通信单元可以是通信接口或收发器,或者是通信芯片或者片上系统的输入输出接口。上述处理单元可以是一个或多个处理器。
应理解,根据本申请实施例的终端设备400可对应于本申请方法实施例中的终端设备,并且终端设备400中的各个单元的上述和其它操作和/或功能分别为了实现图8至图17所示方法200中终端设备的相应流程,为了简洁,在此不再赘述。
图22示出了根据本申请实施例的网络设备500的示意性框图。如图22所示,该网络设备500包括:
通信单元510,用于向终端设备发送第一信令,所述第一信令用于指示所述终端设备向目标网络设备发起随机接入,其中,所述第一信令包括第一指示信息,所述第一指示信息用于指示所述目标网络设备。
在一些实施例中,所述第一指示信息用于指示第一控制资源集池索引,其中,所述第一控制资源池索引与所述目标网络设备关联。
在一些实施例中,所述第一控制资源集池索引和第一定时提前组标识TAG ID关联,所述第一TAG ID与所述目标网络设备关联。
在一些实施例中,所述第一指示信息用于指示第一空间信息,其中,所述第一空间信息与所述目标网络设备关联。
在一些实施例中,所述第一空间信息和第一TAG ID关联,所述第一TAG ID与所述目标网络设 备关联。
在一些实施例中,所述第一空间信息和第一控制资源集池索引关联,所述第一控制资源集池索引与所述目标网络设备关联。
在一些实施例中,所述第一空间信息包括第一传输配置指示TCI状态和/或第一空间关系信息。
在一些实施例中,所述第一TCI状态和第一TAG ID关联,所述第一TAG ID与所述目标网络设备关联;和/或
所述第一空间关系信息和第一TAG ID关联,所述第一TAG ID与所述目标网络设备关联。
在一些实施例中,所述第一空间信息还用于指示所述终端设备发送物理随机接入信道PRACH的空间滤波器。
在一些实施例中,在所述第一空间信息指示同步信号块SSB资源索引的情况下,所述第一空间信息还用于指示所述终端设备发送PRACH的空间滤波器。
在一些实施例中,所述第一TCI状态为上行TCI状态或联合TCI状态。
在一些实施例中,所述第一指示信息用于指示第一物理小区标识PCI,其中,所述第一PCI与所述目标网络设备关联。
在一些实施例中,所述第一PCI和第一TAG ID关联,所述第一TAG ID与所述目标网络设备关联;或者
所述第一PCI和第一控制资源集池索引关联,所述第一控制资源集池索引与所述目标网络设备关联。
在一些实施例中,所述第一信令还包括:
第二指示信息,用于指示所述终端设备接收随机接入响应RAR所使用的空间滤波器。
在一些实施例中,所述第二指示信息用于指示第二TCI状态,其中,所述第二TCI状态为下行TCI状态或联合TCI状态。
在一些实施例中,所述通信单元510还用于:向所述终端设备发送RAR,所述RAR包括目标TA值。
在一些实施例中,所述RAR还包括第一TAG ID或第一控制资源集池索引,所述第一TAG ID或所述第一控制资源集池索引与所述目标网络设备关联。
在一些实施例中,所述目标TA值与所述第一TAG ID关联。
在一些实施例中,所述网络设备是与CSS关联的网络设备。
在一些实施例中,所述目标网络设备是所述网络设备。
在一些实施例中,所述目标网络设备和所述网络设备不是同一网络设备。
在一些实施例中,在目标网络设备和所述网络设备不是同一网络设备的情况下,
所述网络设备和所述目标网络设备均为服务小区下的网络设备;或者,所述网络设备是服务小区下的网络设备,所述目标网络设备是非服务小区下的网络设备;或者,所述网络设备是非服务小区下的网络设备,所述目标网络设备是非服务小区下的网络设备。
在一些实施例中,所述第一信令为物理下行控制信道PDCCH命令。
可选地,在一些实施例中,上述通信单元可以是通信接口或收发器,或者是通信芯片或者片上系统的输入输出接口。
应理解,根据本申请实施例的网络设备500可对应于本申请方法实施例中的第一网络设备,并且网络设备500中的各个单元的上述和其它操作和/或功能分别为了实现图8至图17所示方法200中第一网络设备的相应流程,为了简洁,在此不再赘述。
图23示出了根据本申请实施例的网络设备800的示意性框图。如图23所示,该网络设备800包括:
通信单元810,用于向终端设备发送随机接入响应RAR,所述RAR包括目标定时提前TA值,其中,所述RAR是对物理随机接入信道PRACH的响应,所述PRACH的接收端是目标网络设备,所述终端设备向所述目标网络设备发送PRACH是第一网络设备触发的。
在一些实施例中,所述RAR还包括第一TAG ID或第一控制资源集池索引,所述第一TAG ID或所述第一控制资源集池索引与所述目标网络设备关联。
在一些实施例中,所述目标TA值与所述第一TAG ID关联。
在一些实施例中,所述网络设备是所述目标网络设备或与公共搜索空间CSS关联的网络设备。
在一些实施例中,所述第一网络设备是与CSS关联的网络设备。
在一些实施例中,所述目标网络设备和所述第一网络设备是同一网络设备,或,所述目标网络设备和所述第一网络设备不是同一网络设备。
在一些实施例中,在目标网络设备和所述第一网络设备不是同一网络设备的情况下,
所述第一网络设备和所述目标网络设备均为服务小区下的网络设备;或者
所述第一网络设备是服务小区下的网络设备,所述目标网络设备是非服务小区下的网络设备;或者
所述第一网络设备是非服务小区下的网络设备,所述目标网络设备是非服务小区下的网络设备。
可选地,在一些实施例中,上述通信单元可以是通信接口或收发器,或者是通信芯片或者片上系统的输入输出接口。上述处理单元可以是一个或多个处理器。
应理解,根据本申请实施例的网络设备800可对应于本申请方法实施例中的网络设备,并且网络设备800中的各个单元的上述和其它操作和/或功能分别为了实现图8至图17所示方法200中网络设备的相应流程,为了简洁,在此不再赘述。
图24示出了根据本申请实施例的终端设备1000的示意性框图。如图24所示,该终端设备1000包括:
通信单元1010,用于在第一定时提前TA定时器超时的情况下,终端设备基于目标参考信号向目标网络设备发送物理随机接入信道PRACH;
其中,所述第一TA定时器与第一定时提前组标识TAG ID关联,所述目标网络设备与所述第一TAG ID关联,所述目标参考信号是所述终端设备在多个候选参考信号中选择的所述目标网络设备关联的参考信号。
在一些实施例中,所述多个候选参考信号分为多个参考信号组,每个参考信号组关联一个网络设备,其中,每个参考信号组包括一个或多个候选参考信号。
在一些实施例中,所述每个参考信号组关联一个网络设备,包括:
每个参考信号组关联一个TAG ID,所述TAG ID关联一个网络设备。
在一些实施例中,所述多个参考信号组是预定义的,或者,网络设备配置的。
在一些实施例中,所述网络设备1000还包括:
处理单元,用于在预配置的PRACH资源中选择所述目标参考信号关联的PRACH资源;
通信单元1010还用于:使用所述目标参考信号关联的PRACH资源向所述目标网络设备发送PRACH。
在一些实施例中,所述通信单元1010还用于:接收第二网络设备发送的随机接入响应,所述随机接入响应包括目标TA值。
在一些实施例中,所述第二网络设备为所述目标网络设备,或与公共搜索空间CSS关联的网络设备。
在一些实施例中,所述RAR还包括第一TAG ID或第一控制资源集池索引,所述第一TAG ID或所述第一控制资源集池索引与所述目标网络设备关联。
在一些实施例中,所述目标参考信号包括目标同步信道块SSB。
可选地,在一些实施例中,上述通信单元可以是通信接口或收发器,或者是通信芯片或者片上系统的输入输出接口。上述处理单元可以是一个或多个处理器。
应理解,根据本申请实施例的终端设备1000可对应于本申请方法实施例中的终端设备,并且终端设备1000中的各个单元的上述和其它操作和/或功能分别为了实现图18至图20所示方法300中终端设备的相应流程,为了简洁,在此不再赘述。
图25示出了根据本申请实施例的网络设备1100的示意性框图。如图25所示,该网络设备1100包括:
通信单元1110,用于向终端设备发送第一配置信息,所述第一配置信息用于配置多个参考信号组和多个网络设备的关联关系,其中,每个参考信号组包括一个或多个候选参考信号,所述关联关系用于所述终端设备确定向目标网络设备发送物理随机接入信道PRACH所使用的PRACH资源。
在一些实施例中,在所述关联关系中,每个参考信号组关联一个网络设备。
在一些实施例中,所述每个参考信号组关联一个网络设备,包括:
每个参考信号组关联一个TAG ID,所述TAG ID关联一个网络设备。
在一些实施例中,所述通信单元1110还用于:向所述终端设备发送随机接入响应,所述随机接入响应包括目标TA值。
在一些实施例中,所述RAR还包括第一TAG ID或第一控制资源集池索引,所述第一TAG ID或所述第一控制资源集池索引与目标网络设备关联,所述目标网络设备为所述终端设备发起随机接入的网络设备。
在一些实施例中,所述参考信号包括同步信道块SSB。
可选地,在一些实施例中,上述通信单元可以是通信接口或收发器,或者是通信芯片或者片上系统的输入输出接口。上述处理单元可以是一个或多个处理器。
应理解,根据本申请实施例的网络设备1100可对应于本申请方法实施例中的第一网络设备,并且网络设备1100中的各个单元的上述和其它操作和/或功能分别为了实现图18至图20所示方法300中第一网络设备的相应流程,为了简洁,在此不再赘述。
图26是本申请实施例提供的一种通信设备600示意性结构图。图26所示的通信设备600包括处理器610,处理器610可以从存储器中调用并运行计算机程序,以实现本申请实施例中的方法。
可选地,如图26所示,通信设备600还可以包括存储器620。其中,处理器610可以从存储器620中调用并运行计算机程序,以实现本申请实施例中的方法。
其中,存储器620可以是独立于处理器610的一个单独的器件,也可以集成在处理器610中。
可选地,如图26所示,通信设备600还可以包括收发器630,处理器610可以控制该收发器630与其他设备进行通信,具体地,可以向其他设备发送信息或数据,或接收其他设备发送的信息或数据。
其中,收发器630可以包括发射机和接收机。收发器630还可以进一步包括天线,天线的数量可以为一个或多个。
可选地,该通信设备600具体可为本申请实施例的第一网络设备或第二网络设备,并且该通信设备600可以实现本申请实施例的各个方法中由第一网络设备或第二网络设备实现的相应流程,为了简洁,在此不再赘述。
可选地,该通信设备600具体可为本申请实施例的移动终端/终端设备,并且该通信设备600可以实现本申请实施例的各个方法中由移动终端/终端设备实现的相应流程,为了简洁,在此不再赘述。
图27是本申请实施例的芯片的示意性结构图。图27所示的芯片700包括处理器710,处理器710可以从存储器中调用并运行计算机程序,以实现本申请实施例中的方法。
可选地,如图27所示,芯片700还可以包括存储器720。其中,处理器710可以从存储器720中调用并运行计算机程序,以实现本申请实施例中的方法。
其中,存储器720可以是独立于处理器710的一个单独的器件,也可以集成在处理器710中。
可选地,该芯片700还可以包括输入接口730。其中,处理器710可以控制该输入接口730与其他设备或芯片进行通信,具体地,可以获取其他设备或芯片发送的信息或数据。
可选地,该芯片700还可以包括输出接口740。其中,处理器710可以控制该输出接口740与其他设备或芯片进行通信,具体地,可以向其他设备或芯片输出信息或数据。
可选地,该芯片可应用于本申请实施例中的第一网络设备或第二网络设备,并且该芯片可以实现本申请实施例的各个方法中由第一网络设备或第二网络设备实现的相应流程,为了简洁,在此不再赘述。
可选地,该芯片可应用于本申请实施例中的移动终端/终端设备,并且该芯片可以实现本申请实施例的各个方法中由移动终端/终端设备实现的相应流程,为了简洁,在此不再赘述。
应理解,本申请实施例提到的芯片还可以称为系统级芯片,系统芯片,芯片系统或片上系统芯片等。
图28是本申请实施例提供的一种通信系统900的示意性框图。如图28所示,该通信系统900包括终端设备910和网络设备920。
其中,该终端设备910可以用于实现上述方法中由终端设备实现的相应的功能,以及该网络设备920可以用于实现上述方法中由第一网络设备和/或第二网络设备实现的相应的功能,为了简洁,在此不再赘述。
应理解,本申请实施例的处理器可能是一种集成电路芯片,具有信号的处理能力。在实现过程中,上述方法实施例的各步骤可以通过处理器中的硬件的集成逻辑电路或者软件形式的指令完成。上述的处理器可以是通用处理器、数字信号处理器(Digital Signal Processor,DSP)、专用集成电路(Application Specific Integrated Circuit,ASIC)、现成可编程门阵列(Field Programmable Gate Array,FPGA)或者其他可编程逻辑器件、分立门或者晶体管逻辑器件、分立硬件组件。可以实现或者执行本申请实施例中的公开的各方法、步骤及逻辑框图。通用处理器可以是微处理器或者该处理器也可以是任何常规的处理器等。结合本申请实施例所公开的方法的步骤可以直接体现为硬件译码处理器执行完成,或者用译码处理器中的硬件及软件模块组合执行完成。软件模块可以位于随机存储器,闪存、只读存储器,可编程只读存储器或者电可擦写可编程存储器、寄存器等本领域成熟的存储介质中。该存储介质位于存储器,处理器读取存储器中的信息,结合其硬件完成上述方法的步骤。
可以理解,本申请实施例中的存储器可以是易失性存储器或非易失性存储器,或可包括易失性和非易失性存储器两者。其中,非易失性存储器可以是只读存储器(Read-Only Memory,ROM)、可 编程只读存储器(Programmable ROM,PROM)、可擦除可编程只读存储器(Erasable PROM,EPROM)、电可擦除可编程只读存储器(Electrically EPROM,EEPROM)或闪存。易失性存储器可以是随机存取存储器(Random Access Memory,RAM),其用作外部高速缓存。通过示例性但不是限制性说明,许多形式的RAM可用,例如静态随机存取存储器(Static RAM,SRAM)、动态随机存取存储器(Dynamic RAM,DRAM)、同步动态随机存取存储器(Synchronous DRAM,SDRAM)、双倍数据速率同步动态随机存取存储器(Double Data Rate SDRAM,DDR SDRAM)、增强型同步动态随机存取存储器(Enhanced SDRAM,ESDRAM)、同步连接动态随机存取存储器(Synchlink DRAM,SLDRAM)和直接内存总线随机存取存储器(Direct Rambus RAM,DR RAM)。应注意,本文描述的系统和方法的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
应理解,上述存储器为示例性但不是限制性说明,例如,本申请实施例中的存储器还可以是静态随机存取存储器(static RAM,SRAM)、动态随机存取存储器(dynamic RAM,DRAM)、同步动态随机存取存储器(synchronous DRAM,SDRAM)、双倍数据速率同步动态随机存取存储器(double data rate SDRAM,DDR SDRAM)、增强型同步动态随机存取存储器(enhanced SDRAM,ESDRAM)、同步连接动态随机存取存储器(synch link DRAM,SLDRAM)以及直接内存总线随机存取存储器(Direct Rambus RAM,DR RAM)等等。也就是说,本申请实施例中的存储器旨在包括但不限于这些和任意其它适合类型的存储器。
本申请实施例还提供了一种计算机可读存储介质,用于存储计算机程序。
可选的,该计算机可读存储介质可应用于本申请实施例中的第一网络设备,并且该计算机程序使得计算机执行本申请实施例的各个方法中由第一网络设备实现的相应流程,为了简洁,在此不再赘述。
可选的,该计算机可读存储介质可应用于本申请实施例中的第二网络设备,并且该计算机程序使得计算机执行本申请实施例的各个方法中由第二网络设备实现的相应流程,为了简洁,在此不再赘述。
可选地,该计算机可读存储介质可应用于本申请实施例中的移动终端/终端设备,并且该计算机程序使得计算机执行本申请实施例的各个方法中由移动终端/终端设备实现的相应流程,为了简洁,在此不再赘述。
本申请实施例还提供了一种计算机程序产品,包括计算机程序指令。
可选的,该计算机程序产品可应用于本申请实施例中的第一网络设备,并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由第一网络设备实现的相应流程,为了简洁,在此不再赘述。
可选的,该计算机程序产品可应用于本申请实施例中的第二网络设备,并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由第二网络设备实现的相应流程,为了简洁,在此不再赘述。
可选地,该计算机程序产品可应用于本申请实施例中的移动终端/终端设备,并且该计算机程序指令使得计算机执行本申请实施例的各个方法中由移动终端/终端设备实现的相应流程,为了简洁,在此不再赘述。
本申请实施例还提供了一种计算机程序。
可选的,该计算机程序可应用于本申请实施例中的第一网络设备,当该计算机程序在计算机上运行时,使得计算机执行本申请实施例的各个方法中由第一网络设备实现的相应流程,为了简洁,在此不再赘述。
可选的,该计算机程序可应用于本申请实施例中的第二网络设备,当该计算机程序在计算机上运行时,使得计算机执行本申请实施例的各个方法中由第二网络设备实现的相应流程,为了简洁,在此不再赘述。
可选地,该计算机程序可应用于本申请实施例中的移动终端/终端设备,当该计算机程序在计算机上运行时,使得计算机执行本申请实施例的各个方法中由移动终端/终端设备实现的相应流程,为了简洁,在此不再赘述。
本领域普通技术人员可以意识到,结合本文中所公开的实施例描述的各示例的单元及算法步骤,能够以电子硬件、或者计算机软件和电子硬件的结合来实现。这些功能究竟以硬件还是软件方式来执行,取决于技术方案的特定应用和设计约束条件。专业技术人员可以对每个特定的应用来使用不同方法来实现所描述的功能,但是这种实现不应认为超出本申请的范围。
所属领域的技术人员可以清楚地了解到,为描述的方便和简洁,上述描述的系统、装置和单元的具体工作过程,可以参考前述方法实施例中的对应过程,在此不再赘述。
在本申请所提供的几个实施例中,应该理解到,所揭露的系统、装置和方法,可以通过其它的方式实现。例如,以上所描述的装置实施例仅仅是示意性的,例如,所述单元的划分,仅仅为一种逻辑功能划分,实际实现时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一个系统,或一些特征可以忽略,或不执行。另一点,所显示或讨论的相互之间的耦合或直接耦合或通信 连接可以是通过一些接口,装置或单元的间接耦合或通信连接,可以是电性,机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外,在本申请各个实施例中的各功能单元可以集成在一个处理单元中,也可以是各个单元单独物理存在,也可以两个或两个以上单元集成在一个单元中。
所述功能如果以软件功能单元的形式实现并作为独立的产品销售或使用时,可以存储在一个计算机可读取存储介质中。基于这样的理解,本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的部分可以以软件产品的形式体现出来,该计算机软件产品存储在一个存储介质中,包括若干指令用以使得一台计算机设备(可以是个人计算机,服务器,或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。而前述的存储介质包括:U盘、移动硬盘、只读存储器(Read-Only Memory,ROM)、随机存取存储器(Random Access Memory,RAM)、磁碟或者光盘等各种可以存储程序代码的介质。
以上所述,仅为本申请的具体实施方式,但本申请的保护范围并不局限于此,任何熟悉本技术领域的技术人员在本申请揭露的技术范围内,可轻易想到变化或替换,都应涵盖在本申请的保护范围之内。因此,本申请的保护范围应所述以权利要求的保护范围为准。

Claims (78)

  1. 一种无线通信的方法,其特征在于,包括:
    终端设备接收第一网络设备发送的第一信令,所述第一信令用于指示所述终端设备向目标网络设备发起随机接入,其中,所述第一信令包括第一指示信息,所述第一指示信息用于指示所述目标网络设备;
    所述终端设备向所述目标网络设备发送物理随机接入信道PRACH;
    所述终端设备接收随机接入响应RAR,所述RAR包括目标定时提前TA值,所述目标TA值为所述终端设备对所述目标网络设备的TA值。
  2. 根据权利要求1所述的方法,其特征在于,所述第一指示信息用于指示第一控制资源集池索引,其中,所述第一控制资源池索引与所述目标网络设备关联。
  3. 根据权利要求2所述的方法,其特征在于,所述第一控制资源集池索引和第一定时提前组标识TAG ID关联,所述第一TAG ID与所述目标网络设备关联。
  4. 根据权利要求1-3中任一项所述的方法,其特征在于,所述第一指示信息用于指示第一空间信息,其中,所述第一空间信息与所述目标网络设备关联。
  5. 根据权利要求4所述的方法,其特征在于,所述第一空间信息和第一TAG ID关联,所述第一TAG ID与所述目标网络设备关联。
  6. 根据权利要求4所述的方法,其特征在于,所述第一空间信息和第一控制资源集池索引关联,所述第一控制资源集池索引与所述目标网络设备关联。
  7. 根据权利要求4-6中任一项所述的方法,其特征在于,所述第一空间信息包括第一传输配置指示TCI状态和/或第一空间关系信息。
  8. 根据权利要求7所述的方法,其特征在于,所述第一TCI状态和第一TAG ID关联,所述第一TAG ID与所述目标网络设备关联;和/或
    所述第一空间关系信息和第一TAG ID关联,所述第一TAG ID与所述目标网络设备关联。
  9. 根据权利要求7或8所述的方法,其特征在于,所述第一空间信息还用于指示所述终端设备发送物理随机接入信道PRACH的空间滤波器。
  10. 根据权利要求9所述的方法,其特征在于,在所述第一空间信息指示同步信号块SSB资源索引的情况下,所述第一空间信息还用于指示所述终端设备发送PRACH的空间滤波器。
  11. 根据权利要求7-10中任一项所述的方法,其特征在于,所述第一TCI状态为上行TCI状态或联合TCI状态。
  12. 根据权利要求1-11中任一项所述的方法,其特征在于,所述第一指示信息用于指示第一物理小区标识PCI,其中,所述第一PCI与所述目标网络设备关联。
  13. 根据权利要求12所述的方法,其特征在于,所述第一PCI和第一TAG ID关联,所述第一TAG ID与所述目标网络设备关联;或者
    所述第一PCI和第一控制资源集池索引关联,所述第一控制资源集池索引与所述目标网络设备关联。
  14. 根据权利要求1-13中任一项所述的方法,其特征在于,所述第一信令还包括:
    第二指示信息,用于指示所述终端设备接收随机接入响应RAR所使用的空间滤波器。
  15. 根据权利要求14所述的方法,其特征在于,所述第二指示信息用于指示第二TCI状态,其中,所述第二TCI状态为下行TCI状态或联合TCI状态。
  16. 根据权利要求1-15中任一项所述的方法,其特征在于,所述RAR还包括第一TAG ID或第一控制资源集池索引,所述第一TAG ID或所述第一控制资源集池索引与所述目标网络设备关联。
  17. 根据权利要求16所述的方法,其特征在于,所述目标TA值与所述第一TAG ID关联。
  18. 根据权利要求1-17中任一项所述的方法,其特征在于,所述目标TA值是从第二网络设备接收的,所述第二网络设备为所述目标网络设备,或者,公共搜索空间CSS关联的网络设备。
  19. 根据权利要求1-18中任一项所述的方法,其特征在于,所述目标网络设备和所述第一网络设备是同一网络设备,或,所述目标网络设备和所述第一网络设备不是同一网络设备。
  20. 根据权利要求19所述的方法,其特征在于,在目标网络设备和所述第一网络设备不是同一网络设备的情况下,
    所述第一网络设备和所述目标网络设备均为服务小区下的网络设备;或者
    所述第一网络设备是服务小区下的网络设备,所述目标网络设备是非服务小区下的网络设备;或者
    所述第一网络设备是非服务小区下的网络设备,所述目标网络设备是非服务小区下的网络设备。
  21. 根据权利要求1-20中任一项所述的方法,其特征在于,所述第一信令为物理下行控制信道PDCCH命令。
  22. 根据权利要求1-21中任一项所述的方法,其特征在于,所述第一网络设备是与CSS关联的网络设备。
  23. 一种无线通信的方法,其特征在于,包括:
    第一网络设备向终端设备发送第一信令,所述第一信令用于指示所述终端设备向目标网络设备发起随机接入,其中,所述第一信令包括第一指示信息,所述第一指示信息用于指示所述目标网络设备。
  24. 根据权利要求23所述的方法,其特征在于,所述第一指示信息用于指示第一控制资源集池索引,其中,所述第一控制资源池索引与所述目标网络设备关联。
  25. 根据权利要求24所述的方法,其特征在于,所述第一控制资源集池索引和第一定时提前组标识TAG ID关联,所述第一TAG ID与所述目标网络设备关联。
  26. 根据权利要求23-25中任一项所述的方法,其特征在于,所述第一指示信息用于指示第一空间信息,其中,所述第一空间信息与所述目标网络设备关联。
  27. 根据权利要求26所述的方法,其特征在于,所述第一空间信息和第一TAG ID关联,所述第一TAG ID与所述目标网络设备关联。
  28. 根据权利要求26所述的方法,其特征在于,所述第一空间信息和第一控制资源集池索引关联,所述第一控制资源集池索引与所述目标网络设备关联。
  29. 根据权利要求26-28中任一项所述的方法,其特征在于,所述第一空间信息包括第一传输配置指示TCI状态和/或第一空间关系信息。
  30. 根据权利要求29所述的方法,其特征在于,所述第一TCI状态和第一TAG ID关联,所述第一TAG ID与所述目标网络设备关联;和/或
    所述第一空间关系信息和第一TAG ID关联,所述第一TAG ID与所述目标网络设备关联。
  31. 根据权利要求29或30所述的方法,其特征在于,所述第一空间信息还用于指示所述终端设备发送物理随机接入信道PRACH的空间滤波器。
  32. 根据权利要求31所述的方法,其特征在于,在所述第一空间信息指示同步信号块SSB资源索引的情况下,所述第一空间信息还用于指示所述终端设备发送PRACH的空间滤波器。
  33. 根据权利要求29-32中任一项所述的方法,其特征在于,所述第一TCI状态为上行TCI状态或联合TCI状态。
  34. 根据权利要求23-33中任一项所述的方法,其特征在于,所述第一指示信息用于指示第一物理小区标识PCI,其中,所述第一PCI与所述目标网络设备关联。
  35. 根据权利要求34所述的方法,其特征在于,所述第一PCI和第一TAG ID关联,所述第一TAG ID与所述目标网络设备关联;或者
    所述第一PCI和第一控制资源集池索引关联,所述第一控制资源集池索引与所述目标网络设备关联。
  36. 根据权利要求23-35中任一项所述的方法,其特征在于,所述第一信令还包括:
    第二指示信息,用于指示所述终端设备接收随机接入响应RAR所使用的空间滤波器。
  37. 根据权利要求36所述的方法,其特征在于,所述第二指示信息用于指示第二TCI状态,其中,所述第二TCI状态为下行TCI状态或联合TCI状态。
  38. 根据权利要求23-37中任一项所述的方法,其特征在于,所述方法还包括:
    所述第一网络设备向所述终端设备发送RAR,所述RAR包括目标TA值。
  39. 根据权利要求38所述的方法,其特征在于,所述RAR还包括第一TAG ID或第一控制资源集池索引,所述第一TAG ID或所述第一控制资源集池索引与所述目标网络设备关联。
  40. 根据权利要求38或39所述的方法,其特征在于,所述目标TA值与所述第一TAG ID关联。
  41. 根据权利要求23-40中任一项所述的方法,其特征在于,所述第一网络设备是与CSS关联的网络设备。
  42. 根据权利要求23-41中任一项所述的方法,其特征在于,所述目标网络设备是所述第一网络设备。
  43. 根据权利要求23-41中任一项所述的方法,其特征在于,
    所述目标网络设备和所述第一网络设备不是同一网络设备。
  44. 根据权利要求43所述的方法,其特征在于,在目标网络设备和所述第一网络设备不是同一网络设备的情况下,
    所述第一网络设备和所述目标网络设备均为服务小区下的网络设备;或者
    所述第一网络设备是服务小区下的网络设备,所述目标网络设备是非服务小区下的网络设备;或者
    所述第一网络设备是非服务小区下的网络设备,所述目标网络设备是非服务小区下的网络设备。
  45. 根据权利要求23-44中任一项所述的方法,其特征在于,所述第一信令为物理下行控制信道PDCCH命令。
  46. 一种无线通信的方法,其特征在于,包括:
    第二网络设备向终端设备发送随机接入响应RAR,所述RAR包括目标定时提前TA值,其中,所述RAR是对物理随机接入信道PRACH的响应,所述PRACH的接收端是目标网络设备,所述终端设备向所述目标网络设备发送PRACH是第一网络设备触发的。
  47. 根据权利要求46所述的方法,其特征在于,所述RAR还包括第一TAG ID或第一控制资源集池索引,所述第一TAG ID或所述第一控制资源集池索引与所述目标网络设备关联。
  48. 根据权利要求47所述的方法,其特征在于,所述目标TA值与所述第一TAG ID关联。
  49. 根据权利要求46-48中任一项所述的方法,其特征在于,所述第二网络设备是所述目标网络设备或与公共搜索空间CSS关联的网络设备。
  50. 根据权利要求46-49中任一项所述的方法,其特征在于,所述第一网络设备是与CSS关联的网络设备。
  51. 根据权利要求46-50中任一项所述的方法,其特征在于,所述目标网络设备和所述第一网络设备是同一网络设备,或,所述目标网络设备和所述第一网络设备不是同一网络设备。
  52. 根据权利要求51所述的方法,其特征在于,在目标网络设备和所述第一网络设备不是同一网络设备的情况下,
    所述第一网络设备和所述目标网络设备均为服务小区下的网络设备;或者
    所述第一网络设备是服务小区下的网络设备,所述目标网络设备是非服务小区下的网络设备;或者
    所述第一网络设备是非服务小区下的网络设备,所述目标网络设备是非服务小区下的网络设备。
  53. 一种无线通信的方法,其特征在于,包括:
    在第一定时提前TA定时器超时的情况下,终端设备基于目标参考信号向目标网络设备发送物理随机接入信道PRACH;
    其中,所述第一TA定时器与第一定时提前组标识TAG ID关联,所述目标网络设备与所述第一TAG ID关联,所述目标参考信号是所述终端设备在多个候选参考信号中选择的所述目标网络设备关联的参考信号。
  54. 根据权利要求53所述的方法,其特征在于,所述多个候选参考信号分为多个参考信号组,每个参考信号组关联一个网络设备,其中,每个参考信号组包括一个或多个候选参考信号。
  55. 根据权利要求54所述的方法,其特征在于,所述每个参考信号组关联一个网络设备,包括:
    每个参考信号组关联一个TAG ID,所述TAG ID关联一个网络设备。
  56. 根据权利要求54或55所述的方法,其特征在于,所述多个参考信号组是预定义的,或者,网络设备配置的。
  57. 根据权利要求53-56中任一项所述的方法,其特征在于,所述基于目标参考信号向目标网络设备发送物理随机接入信道PRACH,包括:
    在预配置的PRACH资源中选择所述目标参考信号关联的PRACH资源,使用所述目标参考信号关联的PRACH资源向所述目标网络设备发送PRACH。
  58. 根据权利要求53-57中任一项所述的方法,其特征在于,所述方法还包括:
    所述终端设备接收第二网络设备发送的随机接入响应,所述随机接入响应包括目标TA值。
  59. 根据权利要求58所述的方法,其特征在于,所述第二网络设备为所述目标网络设备,或与公共搜索空间CSS关联的网络设备。
  60. 根据权利要求58或59所述的方法,其特征在于,所述RAR还包括第一TAG ID或第一控制资源集池索引,所述第一TAG ID或所述第一控制资源集池索引与所述目标网络设备关联。
  61. 根据权利要求53-60中任一项所述的方法,其特征在于,所述目标参考信号包括目标同步信道块SSB。
  62. 一种无线通信的方法,其特征在于,包括:
    第一网络设备向终端设备发送第一配置信息,所述第一配置信息用于配置多个参考信号组和多个网络设备的关联关系,其中,每个参考信号组包括一个或多个候选参考信号,所述关联关系用于所述终端设备确定向目标网络设备发送物理随机接入信道PRACH所使用的PRACH资源。
  63. 根据权利要求62所述的方法,其特征在于,在所述关联关系中,每个参考信号组关联一个网络设备。
  64. 根据权利要求63所述的方法,其特征在于,所述每个参考信号组关联一个网络设备,包括:
    每个参考信号组关联一个TAG ID,所述TAG ID关联一个网络设备。
  65. 根据权利要求62-64中任一项所述的方法,其特征在于,所述方法还包括:
    所述第一网络设备向所述终端设备发送随机接入响应,所述随机接入响应包括目标TA值。
  66. 根据权利要求65所述的方法,其特征在于,所述RAR还包括第一TAG ID或第一控制资源集池索引,所述第一TAG ID或所述第一控制资源集池索引与目标网络设备关联,所述目标网络设备为所述终端设备发起随机接入的网络设备。
  67. 根据权利要求62-66中任一项所述的方法,其特征在于,所述参考信号包括同步信道块SSB。
  68. 一种终端设备,其特征在于,包括:
    通信单元,用于接收第一网络设备发送的第一信令,所述第一信令用于指示所述终端设备向目标网络设备发起随机接入,其中,所述第一信令包括第一指示信息,所述第一指示信息用于指示所述目标网络设备;
    向所述目标网络设备发送物理随机接入信道PRACH;以及
    接收随机接入响应RAR,所述RAR包括目标定时提前TA值,所述目标TA值为所述终端设备对所述目标网络设备的TA值。
  69. 一种网络设备,其特征在于,包括:
    通信单元,用于向终端设备发送第一信令,所述第一信令用于指示所述终端设备向目标网络设备发起随机接入,其中,所述第一信令包括第一指示信息,所述第一指示信息用于指示所述目标网络设备。
  70. 一种网络设备,其特征在于,包括:
    通信单元,用于向终端设备发送随机接入响应RAR,所述RAR包括目标定时提前TA值,其中,所述RAR是对物理随机接入信道PRACH的响应,所述PRACH的接收端是目标网络设备,所述终端设备向所述目标网络设备发送PRACH是第一网络设备触发的。
  71. 一种终端设备,其特征在于,包括:
    通信单元,用于在第一定时提前TA定时器超时的情况下,基于目标参考信号向目标网络设备发送物理随机接入信道PRACH;
    其中,所述第一TA定时器与第一定时提前组标识TAG ID关联,所述目标网络设备与所述第一TAG ID关联,所述目标参考信号是所述终端设备在多个候选参考信号中选择的所述目标网络设备关联的参考信号。
  72. 一种网络设备,其特征在于,包括:
    通信单元,用于向终端设备发送第一配置信息,所述第一配置信息用于配置多个参考信号组和多个网络设备的关联关系,其中,每个参考信号组包括一个或多个候选参考信号,所述关联关系用于所述终端设备确定向目标网络设备发送物理随机接入信道PRACH所使用的PRACH资源。
  73. 一种终端设备,其特征在于,包括:处理器和存储器,该存储器用于存储计算机程序,所述处理器用于调用并运行所述存储器中存储的计算机程序,执行如权利要求1至22中任一项所述的方法,或如权利要求53至61中任一项所述的方法。
  74. 一种网络设备,其特征在于,包括:处理器和存储器,该存储器用于存储计算机程序,所述处理器用于调用并运行所述存储器中存储的计算机程序,执行如权利要求23至45中任一项所述的方法,或如权利要求46至52中任一项所述的方法,或如权利要求62至67中任一项所述的方法。
  75. 一种芯片,其特征在于,包括:处理器,用于从存储器中调用并运行计算机程序,使得安装有所述芯片的设备执行如权利要求1至22中任一项所述的方法,或如权利要求23至45中任一项所述的方法,或如权利要求46至52中任一项所述的方法,或如权利要求53至61中任一项所述的方法,或如权利要求62至67中任一项所述的方法。
  76. 一种计算机可读存储介质,其特征在于,用于存储计算机程序,所述计算机程序使得计算机执行如权利要求1至22中任一项所述的方法,或如权利要求23至45中任一项所述的方法,或如权利要求46至52中任一项所述的方法,或如权利要求53至61中任一项所述的方法,或如权利要求62至67中任一项所述的方法。
  77. 一种计算机程序产品,其特征在于,包括计算机程序指令,该计算机程序指令使得计算机执行如权利要求1至22中任一项所述的方法,或如权利要求23至45中任一项所述的方法,或如权利要求46至52中任一项所述的方法,或如权利要求53至61中任一项所述的方法,或如权利要求62 至67中任一项所述的方法。
  78. 一种计算机程序,其特征在于,所述计算机程序使得计算机执行如权利要求1至22中任一项所述的方法,或如权利要求23至45中任一项所述的方法,或如权利要求46至52中任一项所述的方法,或如权利要求53至61中任一项所述的方法,或如权利要求62至67中任一项所述的方法。
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CN110832942A (zh) * 2017-07-07 2020-02-21 华为技术有限公司 随机接入的方法、终端设备和网络设备
WO2021077343A1 (zh) * 2019-10-23 2021-04-29 Oppo广东移动通信有限公司 无线通信方法和终端设备
CN113519201A (zh) * 2019-03-19 2021-10-19 Oppo广东移动通信有限公司 随机接入的方法和设备
WO2022028455A1 (zh) * 2020-08-07 2022-02-10 维沃移动通信有限公司 小区切换方法和终端
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