WO2025129673A1 - 一种信道接入方法、装置、终端、芯片和存储介质 - Google Patents

一种信道接入方法、装置、终端、芯片和存储介质 Download PDF

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Publication number
WO2025129673A1
WO2025129673A1 PCT/CN2023/141193 CN2023141193W WO2025129673A1 WO 2025129673 A1 WO2025129673 A1 WO 2025129673A1 CN 2023141193 W CN2023141193 W CN 2023141193W WO 2025129673 A1 WO2025129673 A1 WO 2025129673A1
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WIPO (PCT)
Prior art keywords
channel
channel access
type
cot
access
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PCT/CN2023/141193
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English (en)
French (fr)
Inventor
马腾
赵振山
张世昌
王昊
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Guangdong Oppo Mobile Telecommunications Corp Ltd
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Application filed by Guangdong Oppo Mobile Telecommunications Corp Ltd filed Critical Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority to EP23961995.0A priority Critical patent/EP4730902A1/en
Priority to CN202380100409.8A priority patent/CN121587078A/zh
Priority to PCT/CN2023/141193 priority patent/WO2025129673A1/zh
Publication of WO2025129673A1 publication Critical patent/WO2025129673A1/zh
Anticipated expiration legal-status Critical
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W74/00Wireless channel access
    • H04W74/08Non-scheduled access, e.g. ALOHA
    • H04W74/0808Non-scheduled access, e.g. ALOHA using carrier sensing, e.g. carrier sense multiple access [CSMA]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W56/00Synchronisation arrangements
    • H04W56/001Synchronization between nodes
    • H04W56/0015Synchronization between nodes one node acting as a reference for the others

Definitions

  • the embodiments of the present application relate to the field of communication technology, and specifically to a channel access method, device, terminal, chip and storage medium.
  • a user equipment When a user equipment (UE) sends S-SSB on multiple channels, it can use Type A or Type B multi-channel access to access the multiple channels.
  • the UE needs to independently perform Type 1 channel access on the multiple channels. If the access is successful on any one or more of the channels, the UE can send S-SSB on the one or more channels.
  • the UE In the Type B multi-channel access process, the UE can randomly select one channel from the multiple channels for Type 1 channel access and perform Type 2 channel access on the other channels. If Type 1 channel access is successful, the UE can send S-SSB on each channel where the channel access is successful; if Type 1 channel access fails, the multiple channels are considered unavailable.
  • COT Channel Occupancy Time
  • the above-mentioned multi-channel access methods of type A or type B cannot effectively prevent COT resources from being preempted by users of different systems.
  • the UE adopts the multi-channel access method of type A the UE needs to perform type 1 channel access on the channel included in the COT.
  • the probability of COT being preempted by users of different systems is high; for another example, when the UE adopts the multi-channel access method of type B, if the UE performs type 1 channel access on one of the channels included in the COT, since the channel listening time during type 1 channel access is long, and whether other channels can be used to send S-SSB depends on the channel access result of the channel, it also leads to a high probability that COT is preempted by users of different systems.
  • Embodiments of the present application provide a channel access method, device, terminal, chip, and storage medium.
  • an embodiment of the present application provides a channel access method, which is applied to a first terminal, and the method includes: performing type 2 channel access on at least one first channel in a group of channels, and performing type 2 channel access on at least one first channel.
  • the channel access result obtained is used to determine whether at least one first channel can be used to send a side link synchronization signal block S-SSB in a first time slot; wherein the group of channels is a channel planned to send S-SSB in the first time slot, and at least one first channel and the first time slot are included in the channel occupancy time COT.
  • an embodiment of the present application provides a channel access device, comprising: a processing unit, configured to perform type 2 channel access on at least one first channel in a group of channels, and a channel access result obtained by performing type 2 channel access on at least one first channel is used to determine whether at least one first channel can be used to send a side link synchronization signal block S-SSB in a first time slot; wherein the group of channels is a channel planned to send S-SSB in the first time slot, and at least one first channel and the first time slot are included in the channel occupancy time COT.
  • an embodiment of the present application provides a terminal, including 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 above-mentioned channel access method.
  • an embodiment of the present application provides a chip for implementing the above-mentioned channel access method.
  • the chip includes: a processor for calling and running a computer program from a memory so that a device equipped with the chip executes the above-mentioned channel access method.
  • an embodiment of the present application provides a computer-readable storage medium for storing a computer program, which enables a computer to execute the above-mentioned channel access method.
  • an embodiment of the present application provides a computer program product, including computer program instructions, which enable a computer to execute the above-mentioned channel access method.
  • an embodiment of the present application provides a computer program which, when executed on a computer, enables the computer to execute the above-mentioned channel access method.
  • the first terminal can perform type 2 channel access on at least one first channel in a group of channels, and obtain The channel access result can be used to determine whether the at least one first channel can be used to send S-SSB in the first time slot, wherein the group of channels is a channel planned to be used to send S-SSB in the first time slot, and the at least one first channel and the first time slot are included in the COT.
  • the channel listening duration in the type 2 channel access process is short, performing type 2 channel access on at least one first channel included in the COT, and determining whether the at least one first channel can be used for sending S-SSB based on the result of the channel access, is conducive to improving the probability that the first terminal successfully accesses the at least one first channel and sends S-SSB on the at least one first channel, thereby facilitating the maintenance of occupation of COT resources to avoid loss of COT resources (such as avoiding COT resources being preempted by users of different systems).
  • FIG1 is a schematic diagram of sideline communication within network coverage provided by an embodiment of the present application.
  • FIG2 is a schematic diagram of sideline communication with partial network coverage provided by an embodiment of the present application.
  • FIG3 is a schematic diagram of side communication outside network coverage provided by an embodiment of the present application.
  • FIG4 is a schematic diagram of side communication with a central control node provided in an embodiment of the present application.
  • FIG5 is a schematic diagram of a unicast transmission method provided in an embodiment of the present application.
  • FIG6 is a schematic diagram of a multicast transmission method provided in an embodiment of the present application.
  • FIG7 is a schematic diagram of a broadcast transmission method provided in an embodiment of the present application.
  • FIG8 is a schematic diagram of a time slot structure in NR-V2X provided in an embodiment of the present application.
  • FIG. 9 is a schematic diagram showing changes in the OFDM symbols available in a time slot of a PSSCH in different transmissions provided by an embodiment of the present application.
  • FIG10 is a schematic diagram of a mapping method of a second-order SCI provided in an embodiment of the present application.
  • FIG11 is a schematic diagram of the time-frequency domain position of the PSCCH DMRS provided in an embodiment of the present application.
  • FIG12 is a schematic diagram of the time domain position of 4 DMRS symbols when the PSSCH has 13 symbols provided in an embodiment of the present application;
  • FIG13 is a schematic diagram of a single-symbol DMRS frequency domain type 1 provided in an embodiment of the present application.
  • FIG14 is a schematic diagram of the time-frequency position of the SL CSI-RS provided in an embodiment of the present application.
  • FIG15 is a schematic diagram of an example of channel occupancy time and channel occupancy provided in an embodiment of the present application.
  • FIG16 is a schematic diagram of S-SSB time-frequency domain mapping provided in an embodiment of the present application.
  • FIG17 is a schematic diagram of channel access using a TypeA multi-channel access method provided in an embodiment of the present application.
  • FIG18 is a schematic diagram of channel access using a Type B multi-channel access method provided in an embodiment of the present application.
  • FIG19 is a schematic diagram of a flow chart of a channel access method provided in an embodiment of the present application.
  • FIG20 is a schematic diagram of an implementation scheme of a channel access method provided in an embodiment of the present application.
  • FIG21 is a second schematic diagram of an implementation scheme of the channel access method provided in an embodiment of the present application.
  • FIG22 is a third schematic diagram of an implementation scheme of the channel access method provided in an embodiment of the present application.
  • FIG23 is a schematic diagram of the structure of a channel access device provided in an embodiment of the present application.
  • FIG24 is a schematic structural diagram of a communication device provided in an embodiment of the present application.
  • FIG. 25 is a schematic structural diagram of a chip according to an embodiment of the present application.
  • side communication according to the network coverage of the communicating terminals, it can be divided into side communication within the network coverage, side communication with partial network coverage, side communication outside the network coverage, and side communication with a central control node, as shown in Figures 1, 2, 3 and 4 respectively.
  • some terminals performing sidelink communication are located within the coverage of the base station. These terminals can receive the configuration signaling of the base station and perform sidelink communication according to the configuration of the base station. However, terminals outside the network coverage cannot receive the configuration signaling of the base station. In this case, the terminals outside the network coverage will determine the sidelink configuration according to the pre-configuration information and the information carried in the sidelink broadcast channel (Physical Sidelink Broadcast Channel, PSBCH) sent by the terminals within the network coverage, so as to perform sidelink communication.
  • PSBCH Physical Sidelink Broadcast Channel
  • all terminals performing sideline communications are located outside network coverage, and all terminals determine sideline configurations according to pre-configuration information and perform sideline communications.
  • multiple terminals constitute a communication group, and the communication group has a central control node, such as UE1 in FIG4 .
  • the central control node can also be called a cluster header terminal (Cluster Header, CH).
  • the central control node has at least one of the following functions, but is not limited to: responsible for establishing a communication group; joining and leaving group members; coordinating resources, allocating sideline transmission resources to other terminals, receiving sideline feedback information from other terminals; and coordinating resources with other communication groups.
  • D2D Device to Device
  • V2X Vehicle to Everything
  • Device-to-device communication is a sidelink transmission technology based on D2D. It is different from the traditional cellular system where communication data is received or sent by base stations, so it has higher spectrum efficiency and lower transmission latency.
  • the Internet of Vehicles system adopts terminal-to-terminal direct communication.
  • the 3rd Generation Partnership Project (3GPP) defines two transmission modes: the first mode and the second mode.
  • the transmission resources of the terminal are allocated by the base station, and the terminal sends data on the sidelink according to the resources allocated by the base station; the base station can allocate resources for single transmission to the terminal, or allocate resources for semi-static transmission to the terminal. As shown in Figure 1, the terminal is within the coverage of the network, and the network allocates transmission resources for the terminal to use for sidelink transmission.
  • the second mode The terminal selects a resource in the resource pool for data transmission. As shown in Figure 3, the terminal is outside the coverage of the cell, and the terminal autonomously selects a transmission resource from the pre-configured resource pool for side transmission; or in Figure 1, the terminal autonomously selects a transmission resource from the resource pool configured by the network for side transmission.
  • unicast transmission there is only one receiving terminal.
  • the receiving terminal is all terminals in a communication group, or all terminals within a certain transmission distance.
  • UE1, UE2, UE3 and UE4 constitute a communication group, in which UE1 sends data, and other terminal devices in the group are receiving terminals.
  • the receiving terminal is any terminal around the sending terminal.
  • UE1 is the sending terminal, and the other terminals around it, UE2 to UE6, are all receiving terminals.
  • Figure 8 (a) is a schematic diagram of the time slot structure in which the physical sidelink feedback channel (PSFCH) is not included in the time slot;
  • Figure 8 (b) is a schematic diagram of the time slot structure in which the PSFCH channel is included.
  • PSFCH physical sidelink feedback channel
  • the Physical Sidelink Control Channel (PSCCH) in NR-V2X starts from the second sidelink symbol of the time slot in the time domain, occupies 2 or 3 Orthogonal Frequency Division Multiplexing (OFDM) symbols, and can occupy ⁇ 10, 12 15, 20, 25 ⁇ Physical Resource Blocks (PRBs) in the frequency domain.
  • OFDM Orthogonal Frequency Division Multiplexing
  • PRBs Physical Resource Blocks
  • PSSCH supports up to two stream transmissions, and uses a unit precoding matrix to map the data on the two layers to two antenna ports. At most, only one transport block (TB) can be sent in one PSSCH.
  • transport block TB
  • the modulation symbols sent by the second-order SCI on the two streams are exactly the same. This design can ensure the reception performance of the second-order SCI in highly correlated channels.
  • the code rate of the second-order SCI can be adjusted dynamically within a certain range.
  • the specific code rate is indicated by the first-order SCI, so the receiver does not need to perform blind detection on the second-order SCI even after the code rate changes.
  • the modulation symbols of the second-order SCI are mapped from the symbol where the first PSSCH DMRS is located in the frequency domain first and then in the time domain. On the OFDM symbol where the DMRS is located, the second-order SCI is mapped to the RE not occupied by the DMRS, as shown in Figure 10.
  • PSSCH follows the transport block size (TBS) determination mechanism of the physical downlink shared channel (PDSCH) and physical uplink shared channel (PUSCH) in the new radio (NR), that is, the TBS is determined according to the reference value of the number of REs used for PSSCH in the time slot where PSSCH is located, so that the actual code rate is as close to the target code rate as possible.
  • TBS transport block size
  • the purpose of using the reference value of the number of REs instead of the actual number of REs here is to ensure that the number of REs used to determine the TBS remains unchanged during the PSSCH retransmission process, so that the determined TBS size is the same.
  • the reference value NRE of the number of REs occupied by PSSCH in the TBS determination process is determined according to formula (1):
  • the pseudo-random sequence c(m) is given by Initialize, where l is the index of the OFDM symbol where the DMRS is located in the time slot, is the index of the time slot where the DMRS is located in the system frame, It represents the number of OFDM symbols in a time slot, N ID ⁇ 0,1,...,65535 ⁇ .
  • N ID the number of OFDM symbols in a time slot
  • the specific value of N ID in a resource pool is configured or pre-configured by the network.
  • NR-V2X draws on the design of the NR Uu interface and uses multiple time-domain PSSCH DMRS patterns.
  • the number of available DMRS patterns is related to the number of PSSCH symbols in the resource pool.
  • the available DMRS patterns and the position of each DMRS symbol in the pattern are shown in Table 2.
  • Figure 12 shows a schematic diagram of the time-domain position of 4 DMRS symbols when the PSSCH has 13 symbols.
  • the specific time-domain DMRS pattern to be used is selected by the transmitting UE and indicated in the first-order SCI. This design allows high-speed UEs to select high-density DMRS patterns to ensure the accuracy of channel estimation, while for low-speed UEs, low-density DMRS patterns can be used to improve spectrum efficiency.
  • the generation method of the PSSCH DMRS sequence is almost identical to that of the PSCCH DMRS sequence. The only difference is in the initialization formula c init of the pseudo-random sequence c(m).
  • NR PDSCH and PUSCH support two frequency domain DMRS patterns, namely DMRS frequency domain type 1 and DMRS frequency domain type 2, and for each frequency domain type, there are two different types: single DMRS symbol and double DMRS symbol.
  • Single symbol DMRS frequency domain type 1 supports 4 DMRS ports
  • single symbol DMRS frequency domain type 2 can support 6 DMRS ports
  • the number of supported ports is doubled.
  • PSSCH since PSSCH only needs to support two DMRS ports at most, only single symbol DMRS frequency domain type 1 is supported, as shown in Figure 13.
  • CSI-RS Sidelink Channel State Information Reference Signal
  • NR-V2X supports SL CSI-RS.
  • SL CSI-RS will only be used when the following three conditions are met: send:
  • the UE sends the corresponding PSSCH, that is, the UE cannot only send SL CSI-RS;
  • the maximum number of ports supported by SL CSI-RS is 2.
  • the SL CSI-RS of different ports are multiplexed by code division on two adjacent REs of the same OFDM symbol.
  • the number of SL CSI-RS of each port in a PRB is 1, that is, the density is 1. Therefore, SL CSI-RS will appear in at most one OFDM symbol in a PRB, and the specific position of the OFDM symbol is determined by the transmitting terminal.
  • SL CSI-RS cannot be located in the same OFDM symbol as PSCCH and the second-order SCI.
  • the SL-CSI-RS cannot be sent on the same OFDM symbol as the PSSCH DMRS.
  • the position of the OFDM symbol where the SL CSI-RS is located is indicated by the sl-CSI-RS-FirstSymbol parameter in PC5RRC.
  • the position of the first RE occupied by SL CSI-RS in a PRB is indicated by the sl-CSI-RS-FreqAllocation parameter in PC5RRC. If SL CSI-RS is one port, this parameter is a bitmap with a length of 12, corresponding to 12 REs in one PRB. If SL CSI-RS is two ports, this parameter is a bitmap with a length of 6. In this case, SL CSI-RS occupies two REs, 2f(1) and 2f(1)+1, where f(1) represents the index of the bit with a value of 1 in the above bitmap.
  • the frequency domain position of SL CSI-RS is also determined by the transmitting terminal, but the determined frequency domain position of SL CSI-RS cannot conflict with PT-RS.
  • FIG14 shows a schematic diagram of the time-frequency position of a SL CSI-RS.
  • the number of SL CSI-RS ports is 2
  • sl-CSI-RS-FirstSymbol is 8
  • the NR system introduced by the 3GPP R15 standard is a communication technology for use on existing and new licensed spectrum.
  • the NR system can achieve seamless coverage, high spectrum efficiency, high peak rate and high reliability of cellular networks.
  • LTE Long Term Evolution
  • unlicensed spectrum or unlicensed spectrum
  • the NR system can also use unlicensed spectrum as part of 5G cellular network technology to provide services to users.
  • NR-U NR-unlicensed
  • the NR-U system supports two networking modes: licensed spectrum assisted access and unlicensed spectrum independent access.
  • the former requires the use of licensed spectrum to access the network, and the unlicensed spectrum is used as a secondary carrier; the latter can be independently networked through unlicensed spectrum, and the UE can directly access the network through the unlicensed spectrum.
  • the range of unlicensed spectrum used by the NR-U system introduced in 3GPP R16 is concentrated in the 5GHz and 6GHz frequency bands, such as 5925-7125MHz in the United States, or 5925-6425MHz in Europe. In the R16 standard, band 46 (5150MHz-5925MHz) is newly defined as an unlicensed spectrum.
  • Unlicensed spectrum is a spectrum that can be used for radio equipment communication, which is divided by countries and regions. This spectrum is usually considered to be a shared spectrum, that is, as long as the communication equipment meets the regulatory requirements set by the country or region on the spectrum, it can use the spectrum without applying for exclusive spectrum authorization from the exclusive spectrum management agency of the country or region. Since the use of unlicensed spectrum needs to meet the specific regulatory requirements of each country and region, such as the communication equipment using unlicensed spectrum in accordance with the principle of "Listen Before Talk (LBT)". Therefore, NR technology needs to be enhanced accordingly to adapt to the regulatory requirements of unlicensed frequency bands, while efficiently using unlicensed spectrum to provide services. In the 3GPP R16 standard, the standardization of NR-U technology in the following aspects is mainly completed: channel monitoring process; initial access process; control channel design; Hybrid Automatic Repeat reQuest (HARQ) and scheduling; scheduling-free authorized transmission, etc.
  • HARQ Hybrid Automatic Repeat reQuest
  • the duration that the communication device can use the channel for communication transmission cannot exceed a certain duration. This mechanism limits the maximum duration that can be used for communication after a successful LBT, so that different communication devices have the opportunity to access the shared channel, thereby allowing different communication systems to coexist in a friendly manner on the shared spectrum.
  • channel monitoring is not a global regulation, it can bring interference avoidance and friendly coexistence benefits to communication transmissions between communication systems on shared spectrum. Therefore, in the design process of NR system on unlicensed spectrum, channel monitoring is a feature that communication equipment in the system must support. From the perspective of system networking, channel monitoring includes two mechanisms, one is load-based equipment (LBE) LBT, also known as dynamic channel monitoring or dynamic channel occupancy, and the other is frame-based equipment (FBE) LBT, also known as semi-static channel monitoring or semi-static channel occupancy.
  • LBE load-based equipment
  • FBE frame-based equipment
  • Dynamic channel monitoring can also be considered as an LBT method based on LBE.
  • the principle of channel monitoring is that the communication equipment performs LBT on the carrier of the unlicensed spectrum after the service arrives, and starts sending signals on the carrier after the LBT is successful.
  • the LBT method of dynamic channel monitoring includes Type 1 channel access method and Type 2 channel access method.
  • the Type 1 channel access method is a multi-slot channel detection with random backoff based on the adjustment of the contention window size, in which the corresponding channel access priority (Channel Access Priority Class, CAPC) p can be selected according to the priority of the service to be transmitted.
  • CAPC Channel Access Priority Class
  • the Type 2 channel access method is a channel access method based on a fixed-length monitoring time slot, in which the Type 2 channel access method includes Type 2A channel access, Type 2B channel access and Type 2C channel access.
  • the Type 1 channel access method is mainly used for communication equipment to initiate channel occupation, and the Type 2 channel access method is mainly used for communication equipment to share channel occupation.
  • One special case that needs to be explained is that when the base station initiates channel occupancy for the transmission of the Synchronization Signal/Physical Broadcast Channel (SS/PBCH) block within the Discovery Reference Symbol (DRS) window and the DRS window does not include UE's unicast data transmission, if the length of the DRS window does not exceed 1ms and the duty cycle of the DRS window transmission does not exceed 1/20, then the base station can use Type2A channel access to initiate channel occupancy.
  • SS/PBCH Synchronization Signal/Physical Broadcast Channel
  • DRS Discovery Reference Symbol
  • FIG15 shows an example of a channel occupancy time obtained by a communication device after successful LBT on a channel of an unlicensed spectrum and signal transmission using resources within the channel occupancy time.
  • the channel access parameters corresponding to the channel access priority p on the base station side are shown in Table 3.
  • m p refers to the number of backoff slots corresponding to the channel access priority p
  • CWp refers to the contention window (Contention Window, CW) size corresponding to the channel access priority p
  • CW min,p refers to the minimum value of CW p corresponding to the channel access priority p
  • CW max,p refers to the maximum value of CW p corresponding to the channel access priority p
  • T mcot,p refers to the maximum channel occupancy time length corresponding to the channel access priority p.
  • the base station can use the channel to transmit the service to be transmitted.
  • the maximum time length that the base station can use the channel for transmission cannot exceed T mcot,p .
  • the resources in the COT can also be shared with the UE for uplink transmission.
  • the channel access mode that the UE can use is Type 2A channel access, Type 2B channel access or Type 2C channel access, among which Type 2A channel access, Type 2B channel access and Type 2C channel access are all channel access modes based on fixed-length monitoring time slots.
  • Type2A channel access
  • Type2B channel access
  • the UE's channel detection method is 16 ⁇ s single-slot channel detection. Specifically, under Type2B channel access, the UE can perform 16 ⁇ s channel monitoring before the start of transmission, and transmit after the channel monitoring is successful. Among them, the gap between the start position of the transmission and the end position of the previous transmission is 16 ⁇ s.
  • Type2C channel access
  • the UE transmits without performing channel detection after the gap ends. Specifically, under Type 2C channel access, the UE can directly transmit, wherein the gap between the start position of the transmission and the end position of the previous transmission is less than or equal to 16 ⁇ s. The length of the transmission does not exceed 584 ⁇ s.
  • Channel access parameter indication (including cyclic prefix extension (CPE))
  • the base station can explicitly indicate channel access parameters such as CPE length, channel access mode or channel access priority to the UE by means of joint coding.
  • channel access parameters such as CPE length, channel access mode or channel access priority to the UE by means of joint coding.
  • the following introduces the characteristics of the indication mode of channel access parameters introduced in different DCI formats.
  • the set of joint indications of channel access mode and CPE length preset in the standard is shown in Table 4.
  • the fallback uplink authorization includes 2-bit LBT indication information, and the 2-bit LBT indication information is used to indicate the jointly coded channel access mode and CPE length from the set shown in Table 4.
  • the channel access mode and CPE length are used for PUSCH transmission. If the channel access mode is Type 1 channel access, the UE selects the channel access priority CAPC according to the service priority.
  • the set of channel access mode and CPE length joint indications preset in the standard is shown in Table 4.
  • the fallback downlink grant includes 2-bit LBT indication information, which is used to indicate the jointly coded channel access mode and CPE length from the set shown in Table 4.
  • the channel access mode and CPE length are used for PUCCH transmission, where the PUCCH can carry the positive acknowledgement (ACK) or negative acknowledgement (Negative ACK) corresponding to the PDSCH. If the channel access mode is Type 1 channel access, the UE determines that the channel access priority CAPC for transmitting PUCCH is 1.
  • C1 is specified by the protocol.
  • the values of C2 and C3 are configured by high-level parameters.
  • the value range of C2 and C3 is 1 to 28; when the subcarrier spacing is 60kHz, the value range of C2 and C3 is 2 to 28.
  • Non-fallback uplink grant for scheduling PUSCH transmission (DCI format 0_1):
  • the high-level configuration LBT parameter indication set includes at least one jointly coded channel access method, CPE length and CAPC.
  • the non-fallback uplink authorization includes LBT indication information, and the LBT indication information is used to indicate the jointly coded channel access method, CPE length and CAPC from the above-mentioned LBT parameter indication set.
  • the channel access method, CPE length and CAPC are used for PUSCH transmission. If the indicated channel access method is Type 2 channel access, the CAPC indicated at the same time is the CAPC used by the base station when obtaining the COT.
  • the LBT indication information includes a maximum of 6 bits.
  • Non-fallback downlink grant for scheduling PDSCH transmission (DCI format 1_1):
  • the high-level configuration LBT parameter indication set includes at least one jointly coded channel access method and CPE length.
  • the non-fallback downlink authorization includes LBT indication information, and the LBT indication information is used to indicate the jointly coded channel access method and CPE length from the above-mentioned LBT parameter indication set.
  • the LBT indication information includes a maximum of 4 bits.
  • the base station can also implicitly indicate the channel access mode within the COT.
  • the UE receives an UL grant or DL grant sent by the base station indicating that the channel access type corresponding to the PUSCH or PUCCH is Type 1 channel access
  • the UE can determine the PUSCH or PUCCH belongs to the COT of the base station.
  • the UE receives DCI format 2_0 sent by the base station, and determines that the PUSCH or PUCCH belongs to the COT of the base station according to the DCI format 2_0.
  • the UE can update the channel access type corresponding to the PUSCH or PUCCH to Type2A channel access instead of Type1 channel access.
  • the mapping of S-SSB in the time-frequency domain is shown in Figure 16.
  • S-SSB cycle 160ms
  • the first-class S-SSB is the S-SSB time slot resource configured by R16/R17SL
  • the second-class S-SSB is the additional S-SSB time slot resource newly defined by R18.
  • the frequency domain resource corresponding to an S-SSB time slot if the frequency domain contains 4 resource block (RB) sets, the UE can try to map/transmit S-SSB on one or more of the RB sets.
  • the attempt here means that the UE needs to perform LBT on an RB set first.
  • the S-SSB is mapped/sent on the RB set. If it needs to be sent on multiple RB sets, then LBT is performed on the multiple RB sets respectively, and the LBT results on each RB set are used to determine whether the S-SSB can be sent on the corresponding RB set. In an RB set, S-SSB is repeatedly mapped in the frequency domain. In multiple RB sets corresponding to a time slot, the S-SSB is also repeated in each RB set.
  • each R16/R17 S-SSB time slot corresponds to K additional S-SSB time slots, and the intervals between these S-SSB time slots need to be obtained through configuration or pre-configuration.
  • 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.
  • the "correspondence" mentioned in the embodiments of the present application can mean that there is a direct or indirect correspondence relationship between the two, or it can mean that there is an association relationship between the two, or it can mean that there is an indication and being indicated, configuration and being configured, etc.
  • predefined or “predefined rules” mentioned in the embodiments of the present application can be implemented by pre-saving corresponding codes, tables or other methods that can be used to indicate relevant information in devices (for example, including terminal devices and network devices), and the present application does not limit its specific implementation method.
  • predefined may refer to the definition in the protocol.
  • protocol may refer to a standard protocol in the field of communications, such as LTE protocols, NR protocols, and related protocols used in future communication systems, and the present application does not limit this.
  • the embodiments of the present application do not limit the specific form of the terminal.
  • the terminal in the embodiments of the present application may refer to an access terminal, a user equipment (UE), a user unit, a user station, a mobile station, a mobile station, a remote station, a remote terminal, a mobile device, a user terminal, a terminal device, a wireless communication device, a user agent or a user device.
  • UE user equipment
  • the access terminal may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, an IoT device, a satellite handheld terminal, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), 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 a 5G network, or a terminal device in a future evolution network, etc.
  • SIP Session Initiation Protocol
  • IoT IoT device
  • satellite handheld terminal a Wireless Local Loop (WLL) station
  • PDA Personal Digital Assistant
  • PDA Personal Digital Assistant
  • the supported channel access methods include Type 1 (Type1) and Type 2A (Type2A) channel access methods; when the UE sends S-SSB on multiple channels, it is necessary to perform channel access on the multiple channels separately, and the supported multi-channel access methods include Type A (TypeA) and Type B (TypeB) channel access methods.
  • the UE needs to independently perform Type1 channel access on the multiple channels. If the access is successful on any one or more of the channels, the UE can send S-SSB on the one or more channels.
  • the UE can randomly select one channel from the multiple channels for Type1 channel access and the other channels for Type2 channel access. If the Type1 channel access is successful, the UE can send S-SSB on each channel where the channel access is successful; if the Type1 channel access fails, the multiple channels are considered unavailable.
  • FIG17 is a schematic diagram showing an example of channel access using TypeA multi-channel access method in a scenario where other UEs share COT with the current UE.
  • the UE independently uses Type1 channel access method to perform LBT channel sensing in each channel/RB set.
  • the COT contains channel #2 (RB set #2) and channel #3 (RB set #3).
  • the channel sensing time of the Type1 channel access process is very long, which is much longer than the channel sensing time of Type2A (25 ⁇ s)
  • COT will be lost. Therefore, it is stipulated that in COT Type 2 channel access is required internally.
  • the UE still uses Type 1 channel access according to the pre-planned plan, it will not be able to use the time and frequency resources within the COT duration. In this way, the probability of COT loss is greatly increased, resulting in a waste of resources.
  • the longer the channel listening time the easier it is for resources to be occupied (for example, occupied by UEs of different systems).
  • other UEs such as UEs of different systems
  • use the Type 2A channel access method with a shorter listening time to access channels on channels #2 and #3 at this time there is a high probability that they will seize the COT resources. In this way, the current UE has to abandon the existing COT. If the current UE abandons the existing COT and re-initiates COT using the Type 1 channel listening method, the existing COT resources will be wasted.
  • Figure 18 shows a schematic diagram of an example of channel access using Type B multi-channel access in a scenario where other UEs share COT with the current UE.
  • the UE selects one channel from a set of channels/RB sets to use Type 1 channel access, and other channels use Type 2 channel access.
  • the UE selects channel #2 (RB set #2) to use Type 1 channel access, and channel #0 (RB set #0), channel #1 (RB set #1) and channel #3 (RB set #3) to use Type 2 channel access, and whether the channel using Type 2 channel access can be used to send S-SSB depends on whether Type 1 channel access is successful on channel #2, that is, the channel access correlation between different channels is very high.
  • Type 1 channel access If the UE plans to use Type 1 channel access on channel #2 in advance, and COT shared resources appear after channel listening has started, it is impossible to switch from Type 1 channel access to Type 2 channel access. In this way, if other UEs (such as UEs from different systems) use Type 2A channel access with a shorter listening time to access channel #2 at this time, there is a high probability that the current UE will fail to access channel #2, resulting in the inability to send S-SSB on both channel #2 and channel #3, which will lead to the loss of COT.
  • UEs such as UEs from different systems
  • the purpose of supporting the transmission of S-SSB on multiple channels/RB sets is that when there are COT shared resources, in addition to being able to send S-SSB on the anchor channel/anchor RB set, the UE can also send S-SSB on the channel/RB set included in the COT, so as to maintain the occupation of the COT resources to avoid the COT resources being preempted by UEs of different systems, thereby ensuring the resource utilization efficiency of the current sideline system.
  • the multi-channel access mechanism of Type A and Type B specified in the existing mechanism does not have an effective way to maintain the occupancy of COT for scenarios where COT shared resources appear before sending S-SSB, resulting in a high probability of COT loss (such as COT being preempted by UEs of different systems). This is contrary to the original intention of sending S-SSB on multiple channels/RB sets. Therefore, for scenarios where COT shared resources appear before sending S-SSB, how to avoid COT loss is an urgent problem to be solved.
  • a first terminal may perform type 2 (Type 2) channel access on at least one first channel in a group of channels, and the obtained channel access result may be used to determine whether the at least one first channel may be used to send S-SSB in a first time slot, wherein the group of channels is a channel planned to send S-SSB in a first time slot, and the at least one first channel and the first time slot are included in the COT.
  • Type 2 type 2
  • type 2 channel access is performed on at least one first channel included in the COT, and based on the result of the channel access, it is determined whether the at least one first channel can be used for sending S-SSB.
  • This is beneficial to increase the probability that the first terminal successfully accesses the at least one first channel and sends S-SSB on the at least one first channel, thereby helping to maintain the occupation of COT resources to avoid the loss of COT resources (such as avoiding the COT resources being preempted by users of other systems).
  • performing channel access can also be replaced by “performing LBT” or “performing channel listening”.
  • the "channel (such as the first channel)” in the embodiment of the present application can also be replaced by "RB set (such as the first RB set)”.
  • FIG19 is a flow chart of a channel access method provided in an embodiment of the present application. As shown in FIG19 , the method may include the following steps:
  • the first terminal performs type 2 channel access on at least one first channel in a group of channels, and the channel access result obtained by performing type 2 channel access on the at least one first channel is used to determine whether the at least one first channel can be used to send S-SSB in the first time slot; wherein, the group of channels is a channel planned to be used to send S-SSB in the first time slot, and the at least one first channel and the first time slot are included in the COT.
  • the channel planned to be used to send S-SSB in the first time slot can also be understood as a predetermined/determined channel to be used to send S-SSB in the first time slot. That is to say, for a predetermined set of channels to be used to send S-SSB in the first time slot, the first terminal can use a channel access method of type 2 (such as Type 2A, Type 2B or Type 2C) on at least one first channel in the set of channels for channel access, and the at least one first channel is included in the COT.
  • type 2 such as Type 2A, Type 2B or Type 2C
  • the channel access result obtained by the first terminal performing type 2 channel access on the at least one first channel can be used to determine whether the at least one first channel can be used to send S-SSB in the first time slot. For example, for a first channel in the at least one first channel, if the result of the first terminal performing type 2 channel access on the first channel is successful, the first terminal can send S-SSB on the first channel, and the time slot for sending S-SSB is the first time slot; if the result of the first terminal performing type 2 channel access on the first channel is a failure, the first terminal cannot send S-SSB on the first channel in the first time slot.
  • the S-SSB is repeatedly mapped in the frequency domain within a channel, that is, the S-SSB can be repeated multiple times (repeatedly mapped multiple times) within a channel
  • sending an S-SSB on a channel can also be understood as sending multiple repeated S-SSBs on the channel.
  • the first terminal can perform type 2 channel access on at least one first channel, and the obtained channel access result can be used to determine whether the at least one first channel can be used to send S-SSB in the first time slot. Since the channel listening time in the type 2 channel access process is short, performing type 2 channel access on at least one first channel included in the COT and determining whether the at least one first channel can be used to send S-SSB based on the result of the channel access is beneficial to improving the probability of the first terminal successfully accessing the at least one first channel and sending S-SSB on the at least one first channel, thereby facilitating the maintenance of COT resource occupation to avoid COT resource loss (such as avoiding COT resources being preempted by users of different systems).
  • the first terminal may stop performing the type 1 channel access.
  • the first terminal may stop performing type 1 channel access on all or part of the first channel when the first terminal obtains the time and frequency information of COT, and may abandon part/all of the channel listening results obtained in the process of performing type 1 channel access. Furthermore, the first terminal may wait until before the first time slot to perform type 2 channel access on all or part of the first channel to increase the probability of successful channel access, thereby reducing the probability of COT loss.
  • the first terminal may not perform the type 1 channel access if at the first moment, the first terminal does not start to perform type 1 channel access on the whole or part of the first channel.
  • starting to execute type 1 channel access can also be understood as starting to implement the channel listening process of type 1 channel access, or can also be understood as starting to execute type 1 channel listening.
  • the first terminal can perform type 1 channel access on all or part of the first channel according to the pre-planned plan.
  • the first terminal may use the channel access method of type 2 to perform channel Access.
  • the device communicating with the first terminal may be a weak-capability device (such as a weak-capability terminal), and the weak-capability device may not be able to receive S-SSB on channels other than the anchor channel. Therefore, the first terminal can improve the probability of successfully accessing the anchor channel and sending S-SSB on the anchor channel by performing type 2 channel access on the anchor channel, thereby improving the probability that the weak-capability device receives the S-SSB sent by the first terminal.
  • the method may also include: performing type 1 channel access on at least one second channel in the group of channels; wherein the COT does not include at least one second channel; and a channel access result obtained by performing type 1 channel access on the at least one second channel is used to determine whether the at least one second channel can be used to send S-SSB in the first time slot.
  • the channel access result obtained by performing type 1 channel access on the at least one second channel can be used to determine whether the at least one second channel can be used to send S-SSB in the first time slot. For example, for a second channel in the at least one second channel, if the result of the first terminal performing type 1 channel access on the second channel is successful, the first terminal can send S-SSB on the second channel, and the time slot for sending S-SSB is the first time slot; if the result of the first terminal performing type 1 channel access on the second channel is a failure, the first terminal cannot send S-SSB on the second channel in the first time slot.
  • the first terminal can send S-SSB on the second channel. That is to say, whether each second channel can be used to send S-SSB in the first time slot does not need to depend on whether the channel access result of another channel is successful.
  • the channel access of each second channel can be performed independently, thereby increasing the probability of the first terminal successfully accessing the at least one second channel and sending S-SSB on the at least one second channel, thereby improving the transmission/detection effect of S-SSB.
  • the at least one second channel is a non-anchor channel in the set of channels. That is, the first terminal may select at least one second channel from the non-anchor channels in the set of channels to perform type 1 channel access.
  • the method may also include: performing type 2 channel access on at least one third channel in the group of channels; wherein the COT does not include the at least one second channel; and the channel access result obtained by performing type 2 channel access on the at least one third channel can be used to determine whether the at least one third channel can be used to send S-SSB in the first time slot.
  • the first terminal can perform channel access of type 2 on the at least one third channel. For example, before the first moment, the first terminal has planned to perform channel access of type 2 on the at least one third channel, then, when the pre-planned moment of starting to perform channel access of type 2 comes, the first terminal can perform channel access of type 2 on the at least one third channel according to the pre-planned moment.
  • the channel access result obtained by performing type 2 channel access on the at least one third channel can be used to determine whether the at least one third channel can be used to send S-SSB in the first time slot. For example, for a third channel among the at least one third channel, if the result of the first terminal performing type 2 channel access on the third channel is successful, the first terminal can send S-SSB on the third channel, and the time slot for sending S-SSB is the first time slot; if the result of the first terminal performing type 2 channel access on the third channel is failure, the first terminal cannot send S-SSB on the third channel in the first time slot.
  • the first terminal can send S-SSB on the third channel. That is to say, whether each third channel can be used to send S-SSB in the first time slot does not need to depend on whether the channel access result of another channel is successful.
  • the channel access of each third channel can be performed independently, thereby increasing the probability of the first terminal successfully accessing the at least one third channel and sending S-SSB on the at least one third channel, thereby improving the transmission/detection effect of S-SSB.
  • the channel access method planned to be adopted may be type 1 signal access.
  • the first terminal may plan/pre-plan to perform type 1 channel access on the target first channel; if the first terminal obtains the time-frequency information of the COT, the first terminal may change to type 2 channel access on the target first channel before the first time slot. For other first channels in the at least one first channel (other first channels except the target first channel), the first terminal may perform type 2 channel access before the first time slot according to the pre-planned plan. In this way, it is helpful to increase the probability of the first terminal successfully accessing the first channel included in the COT, thereby helping to avoid the loss of the COT resources.
  • the first terminal may stop performing the type 1 channel access.
  • the first terminal may stop performing type 1 channel access on the target first channel when the first terminal obtains the time-frequency information of COT. 1 channel access, and may abandon some/all channel listening results acquired in the process of executing the channel access of type 1. Further, the first terminal may wait until before the first time slot to perform the channel access of type 2 on the target first channel to increase the success probability of the channel access, thereby reducing the probability of COT loss.
  • the first terminal may not perform the type 1 channel access if the first terminal does not start to perform type 1 channel access on the target first channel at the first moment.
  • the first terminal may not need to perform the type 1 channel access on the target first channel, but may wait until before the first time slot to perform type 2 channel access on the target first channel, so as to increase the probability of successful channel access and thereby reduce the probability of COT loss.
  • the time interval between the first moment (the moment when the first terminal obtains the time-frequency information of the COT) and the first time slot is greater than or equal to the duration required to perform type 2 channel access.
  • the first terminal can stop the type 1 channel access being executed on the target first channel, or, it may not execute type 1 channel access on the target first channel according to the pre-planned plan, but wait until before the first time slot to execute type 2 channel access on the target first channel.
  • the first terminal can perform type 1 channel access on the target first channel according to the pre-planned plan.
  • the method may further include: the first terminal determines/judgments whether the time interval between the first moment and the first time slot is greater than or equal to the time required to perform channel access of type 2.
  • the first terminal may decide whether to perform channel access of type 1 on the target first channel according to the pre-planned plan based on the judgment result.
  • the target first channel is one of the non-anchor channels in the set of channels. That is, the first terminal may select a channel (such as the target first channel) from the non-anchor channels in the set of channels to perform type 1 channel access.
  • the channel access result obtained by performing type 2 channel access on the at least one first channel mentioned above includes: the first channel access result obtained by performing type 2 channel access on the target first channel; when the first channel access result is successful, the channel access result obtained by performing type 2 channel access on the at least one first channel can be used to determine whether the at least one first channel can be used to send S-SSB in the first time slot.
  • the first terminal can determine whether the at least one first channel can be used to send S-SSB in the first time slot based on the channel access result obtained by performing type 2 channel access on the at least one first channel.
  • the method may further include: performing type 2 channel access on at least one fourth channel in the group of channels; wherein the COT does not include the at least one fourth channel; when the first channel access result is successful, the channel access result obtained by performing type 2 channel access on the at least one fourth channel can be used to determine whether the at least one fourth channel can be used to send S-SSB in the first time slot.
  • the first terminal may perform channel access of type 2 on the at least one fourth channel. For example, before the first moment, the first terminal has planned to perform channel access of type 2 on the at least one fourth channel, then, when the pre-planned moment of starting to perform channel access of type 2 comes, the first terminal may perform channel access of type 2 on the at least one fourth channel according to the pre-planned moment.
  • the channel access result obtained by performing type 2 channel access on the at least one fourth channel can be used to determine whether the at least one fourth channel can be used to send S-SSB in the first time slot. For example, when the first channel access result is successful, for a fourth channel among the at least one fourth channel, if the first terminal successfully performs type 2 channel access on the fourth channel, the first terminal can send S-SSB on the fourth channel, and the time slot for sending S-SSB is the first time slot; if the first terminal fails to perform type 2 channel access on the fourth channel, the first terminal cannot send S-SSB on the fourth channel in the first time slot.
  • the group of channels is not used to send S-SSB in the first time slot. That is, whether at least one first channel and/or at least one fourth channel can be used to send S-SSB in the first time slot depends on whether the first channel access result is successful. For example, if the first channel access result is successful, at least one first channel and/or at least one fourth channel can be used to send S-SSB in the first time slot; if the first channel access result is a failure, the group of channels cannot be used to send S-SSB in the first time slot.
  • the method may further include: performing type 2 channel access on at least one fourth channel in the set of channels; wherein the COT does not include the at least one fourth channel; performing type 2 channel access on the at least one fourth channel to obtain The channel access result can be used to determine whether the at least one fourth channel can be used to send S-SSB in the first time slot.
  • the first terminal may perform channel access of type 2 on the at least one fourth channel. For example, before the first moment, the first terminal has planned to perform channel access of type 2 on the at least one fourth channel, then, when the pre-planned moment of starting to perform channel access of type 2 comes, the first terminal may perform channel access of type 2 on the at least one fourth channel according to the pre-planned moment.
  • the channel access result obtained by performing type 2 channel access on the at least one fourth channel can be used to determine whether the at least one fourth channel can be used to send S-SSB in the first time slot. For example, for a fourth channel in the at least one fourth channel, if the result of the first terminal performing type 2 channel access on the fourth channel is successful, the first terminal can send S-SSB on the fourth channel, and the time slot for sending S-SSB is the first time slot; if the result of the first terminal performing type 2 channel access on the fourth channel is failure, the first terminal cannot send S-SSB on the fourth channel in the first time slot.
  • the first terminal can send S-SSB on the fourth channel. That is to say, whether each fourth channel can be used to send S-SSB in the first time slot does not need to depend on whether the first channel access result is successful.
  • the channel access of each fourth channel can be performed independently, thereby increasing the probability of the first terminal successfully accessing the at least one fourth channel and sending S-SSB on the at least one fourth channel, thereby improving the transmission/detection effect of S-SSB.
  • the method may further include: the first terminal receives first information from the second terminal, the first information is used to share the COT with the first terminal, the first information includes time-frequency information of the COT, and the COT is initiated by the second terminal.
  • the second terminal can share the COT initiated by the second terminal with the first terminal by sending the first information to the first terminal, and can carry the time-frequency information of the COT in the first information. Accordingly, the first terminal can obtain the time-frequency information of the COT by receiving the first information. Based on the time-frequency information of the COT, the first terminal can know which channels and time slots are included in the COT.
  • the first terminal can know that at least one first channel and a first time slot are included in the COT based on the time-frequency information of the COT, so that the first terminal can perform type 2 channel access on the at least one first channel to increase the probability of the first terminal successfully accessing the at least one first channel and sending S-SSB on the at least one first channel, thereby avoiding the loss of COT resources.
  • Type 1 channel access may include the following two cases:
  • Case #1 Type 1 channel access is planned, but channel listening has not yet been implemented
  • Case #2 The channel sensing process for Type 1 channel access has already started.
  • the UE has already started the channel sensing process of Type 1 channel access on channel Ci .
  • the UE can switch to the channel access mode of Type 2 (2A, 2B or 2C).
  • the UE when the UE implements Type 1 channel access on channel Ci , if the COT information is obtained at time t1 (corresponding to the first time in the above embodiment), the UE can stop Type 1 channel access/channel sensing at time t1, and start Type 2 (2A, 2B or 2C) channel access/channel sensing at time t2 before time slot n. The UE can ignore the Type 1 channel sensing results (partial/full channel sensing results) that have been obtained.
  • the UE can continue and complete the currently being implemented Type1 channel access process, and use the Type1 channel listening result (if successful) to access the channel.
  • FIG20 shows an example of solution 1.
  • the multi-channel access method that the UE plans to adopt is Type A multi-channel access.
  • the process shown in FIG20 may include the following steps S201 to S204:
  • the UE plans/decides that the frequency domain resources for sending S-SSB in time slot n (S-SSB time slot n) include RB set #0, RB set #1, RB set #2 and RB set #3, and can determine how many repeated S-SSBs are sent on each RB set, as well as the interval between adjacent S-SSBs in one RB set, etc.
  • RB set #0 is the anchor RB set
  • RB set #1, RB set #2 and RB set #3 are non-anchor RB sets.
  • S202 UE performs Type 1 channel access/LBT.
  • the UE may perform channel access using the multi-channel access method of Type A. That is, the UE may independently perform channel access/LBT using the channel access method of Type 1 on RB set #0, RB set #1, RB set #2, and RB set #3.
  • the UE changes to using the Type 2 channel access mode for channel sensing on the RB set included in the COT.
  • the UE obtains COT information at time t1 , and based on the COT information, the UE can know that RB set #2 and RB set #3 are included in the COT. Further, the UE can change to using Type 2 channel access mode for channel sensing on RB set #2 and RB set #3. For example, the UE can stop Type 1 channel access at time t1 , and start Type 2 channel access at time t2 before time slot n.
  • FIG21 shows another example of solution 1.
  • the multi-channel access method that the UE plans to adopt is Type A multi-channel access.
  • the process shown in FIG21 may include the following steps S211 to S214:
  • the UE plans/decides that the frequency domain resources for sending S-SSB in time slot n (S-SSB time slot n) include RB set #0, RB set #1, RB set #2 and RB set #3, and can determine how many repeated S-SSBs are sent on each RB set, as well as the interval between adjacent S-SSBs in one RB set, etc.
  • RB set #0 is the anchor RB set
  • RB set #1, RB set #2 and RB set #3 are non-anchor RB sets.
  • the UE may wait until time t2 before time slot n and start performing Type 2 channel access on RB set #2 and RB set #3.
  • the time when the UE obtains the COT information is t 13.
  • the time interval between t 13 and time slot n is not enough to perform the Type 2 channel access process, that is, at this time, no matter whether the UE continues to perform Type 1 channel listening, there is not enough time to perform the Type 2 channel access process before time slot n. Therefore, in this case, the UE can perform the Type 1 channel access method that has been performed.
  • the UE can select any channel Ci from the non-anchor channels and use the Type 1 channel access method (that is, select any RB set from the non-anchor RB set and use the Type 1 channel access method).
  • Other channels (RB sets) use the Type 2 channel access method.
  • Type 1 channel access may include the following two cases:
  • Case #3 Type 1 channel access is planned, but channel listening has not yet been implemented
  • Case #4 The channel sensing process for Type 1 channel access has already started.
  • the UE has already started the channel sensing process of Type 1 channel access on channel Ci .
  • the UE can switch to Type 2 (2A, 2B or 2C) channel access mode.
  • the UE when the UE implements Type 1 channel access on channel Ci , if the COT information is obtained at time t1 (corresponding to the first time in the above embodiment), the UE can stop Type 1 channel access/channel sensing at time t1, and start Type 2 (2A, 2B or 2C) channel access/channel sensing at time t2 before time slot n. The UE can ignore the Type 1 channel sensing results (partial/full channel sensing results) that have been obtained.
  • the UE can continue and complete the currently being implemented Type1 channel access process, and use the Type1 channel listening result (if successful) to access the channel.
  • the UE if it successfully accesses a channel on a certain channel, it can send an S-SSB on the channel, and the time slot for sending the S-SSB is time slot n.
  • the channel access of each channel can be performed independently without relying on whether the channel access of channel C i is successful.
  • other channels can only determine whether they can access the channel and send S-SSB according to their respective channel access results if channel C i successfully performs channel access. In other words, whether other channels can be used to send S-SSB in time slot n depends on whether channel C i successfully accesses the channel. If channel access fails on channel C i , none of the C channels can be used to send S-SSB.
  • FIG22 shows an example of solution 2.
  • the multi-channel access method that the UE plans to adopt is Type B multi-channel access.
  • the process shown in FIG22 may include the following steps S221 to S224:
  • the UE plans/decides that the frequency domain resources for sending S-SSB in time slot n (S-SSB time slot n) include RB set #0, RB set #1, RB set #2 and RB set #3, and can determine how many repeated S-SSBs are sent on each RB set, as well as the interval between adjacent S-SSBs in one RB set, etc.
  • RB set #0 is the anchor RB set
  • RB set #1, RB set #2 and RB set #3 are non-anchor RB sets.
  • the UE performs Type 1 channel access/LBT on RB set #2.
  • the UE may, for example, plan to use the channel access method of Type 1 on RB set #2, and use the channel access method of Type 2 on other RB sets.
  • the time when the UE obtains the COT information is time t11 . That is, at time t11 , the UE can learn that RB set #2 and RB set #3 are included in the COT based on the COT information. As shown in FIG22, time t11 is before the time when the planned Type 1 channel access starts, that is, at time t11 , the UE has not started to perform Type 1 channel access on RB set #2 as planned. In this case, when the planned Type 1 channel access starts, the UE no longer performs Type 1 channel access on RB set #2.
  • the time when the UE obtains the COT information is t12 or t13 . That is, at t12 or t13 , the UE can learn that RB set #2 and RB set #3 are included in the COT based on the COT information. As shown in FIG22, t12 and t13 are after the time when the UE plans to start performing Type1 channel access. That is, at the time when the UE plans to start performing Type1 channel access, the UE has not yet learned the time-frequency information of the COT. In this case, the UE can perform Type1 channel access as planned on RB set #2.
  • S223, UE performs Type 2 channel access/LBT.
  • the UE can wait until time t2 before time slot n and start to perform Type 2 on RB set #0 to RB set #3. Channel access.
  • the time when the UE obtains the COT information is t13 .
  • the time interval between t13 and time slot n is not enough to perform the Type2 channel access process. Therefore, in this case, the UE can continue to complete the Type1 channel access on RB set #2.
  • the UE can start performing Type2 channel access at t2 as planned on RB set #0, RB set #1 and RB set #3.
  • the UE if it successfully accesses the channel on a certain RB set, it can send S-SSB on the channel, and the time slot for sending the S-SSB is time slot n.
  • the channel access of each RB set can be performed independently without relying on whether the channel access of RB set #2 is successful.
  • other RB sets can determine whether they can access the channel and send S-SSB according to their respective channel access results only when the channel access of RB set #2 is successful. In other words, whether other RB sets can be used to send S-SSB in time slot n depends on whether the channel access of RB set #2 is successful. If the channel access of RB set #2 fails, RB set #0 to RB set 3 cannot be used for sending S-SSB.
  • the UE when the UE adopts a multi-channel access mechanism, in the case of an existing channel access type plan, if the UE obtains the COT time-frequency information, it can decide whether to switch to a new channel access type (for example, switch from Type 1 channel access to Type 2 channel access) based on the time of obtaining the COT time-frequency information and the remaining time before sending the S-SSB. If there is a correlation between the channels originally planned for multi-channel access, then after switching to a new channel access type, the correlation may disappear automatically, or the correlation may still exist.
  • This method increases the probability of channel access by switching the channel access type, while maintaining the existing COT resources to avoid preemption by users of different systems, thereby ensuring the reliability of the sidelink resources in the unlicensed frequency band.
  • downlink indicates that the transmission direction of the signal or data
  • uplink is used to indicate that the transmission direction of the signal or data is the second direction sent from the user equipment of the cell to the site
  • side is used to indicate that the transmission direction of the signal or data is the third direction sent from user equipment 1 to user equipment 2.
  • downlink signal indicates that the transmission direction of the signal is the first direction.
  • the processing unit 2301 is further configured to perform type 1 channel access on at least one second channel in a group of channels; wherein the COT does not include at least one second channel; and a channel access result obtained by performing type 1 channel access on at least one second channel is used to determine whether the at least one second channel can be used to send S-SSB in the first time slot.
  • the processing unit 2301 is further configured to: if at a first moment, type 1 channel access has been started on the target first channel, then at the first moment, stop executing type 1 channel access; wherein the target first channel is one of the at least one first channels, and the first moment is the moment of acquiring the time-frequency information of the COT.
  • Fig. 24 is a schematic structural diagram of a communication device 2400 provided in an embodiment of the present application.
  • the communication device 2400 shown in Fig. 24 includes a processor 2410, and the processor 2410 can call and run a computer program from a memory to implement the method in the embodiment of the present application.
  • the communication device 2400 may further include a memory 2420.
  • the processor 2410 may call and run a computer program from the memory 2420 to implement the method in the embodiment of the present application.
  • the memory 2420 may be a separate device independent of the processor 2410 , or may be integrated into the processor 2410 .
  • the communication device 2400 may further include a transceiver 2430 , and the processor 2410 may control the transceiver 2430 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 2430 may include a transmitter and a receiver.
  • the transceiver 2430 may further include an antenna, and the number of antennas may be one or more.
  • the communication device 2400 may specifically be a terminal (such as a first terminal) of an embodiment of the present application, and the communication device 2400 may implement the corresponding processes implemented by the terminal (such as a first terminal) in each method of the embodiment of the present application, which will not be described herein for the sake of brevity.
  • FIG25 is a schematic structural diagram of a chip according to an embodiment of the present application.
  • the chip 2500 shown in FIG25 includes a processor 2510.
  • the processor 2510 The computer program can be called and executed from the memory to implement the method in the embodiment of the present application.
  • the chip 2500 may further include a memory 2520.
  • the processor 2510 may call and run a computer program from the memory 2520 to implement the method in the embodiment of the present application.
  • the memory 2520 may be a separate device independent of the processor 2510 , or may be integrated into the processor 2510 .
  • the chip 2500 may further include an input interface 2530.
  • the processor 2510 may control the input interface 2530 to communicate with other devices or chips, and specifically, may obtain information or data sent by other devices or chips.
  • the chip 2500 may further include an output interface 2540.
  • the processor 2510 may control the output interface 2540 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 terminal (such as the first terminal) in the embodiment of the present application, and the chip can implement the corresponding processes implemented by the terminal (such as the first terminal) in each method of the embodiment 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.
  • 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 execute, or the hardware and software modules in the decoding processor can be executed.
  • 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.
  • 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 embodiment of the present application also provides a computer program product, including computer program instructions.
  • the computer program product can be applied to the terminal (such as the first terminal) in the embodiment of the present application, and the computer program instructions enable the computer to execute the corresponding process implemented by the terminal (such as the first terminal) in each method of the embodiment of the present application, which will not be described here for brevity.
  • 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

本申请实施例提供一种信道接入方法,该方法包括:在一组信道中的至少一个第一信道上执行类型2的信道接入,在至少一个第一信道上执行类型2的信道接入得到的信道接入结果,用于确定至少一个第一信道是否可用于在第一时隙发送侧行链路同步信号块S-SSB;其中,该一组信道为计划用于在第一时隙发送S-SSB的信道,至少一个第一信道和第一时隙包含在信道占用时间COT内。由于类型2信道接入过程中的信道侦听时长较短,因此,在COT包含的至少一个第一信道上执行类型2的信道接入,并基于该信道接入的结果确定该至少一个第一信道是否可用于S-SSB的发送,有利于提高第一终端成功接入该至少一个第一信道并在该至少一个第一信道上发送S-SSB的概率,从而可避免COT资源丢失。

Description

一种信道接入方法、装置、终端、芯片和存储介质 技术领域
本申请实施例涉及通信技术领域,具体涉及一种信道接入方法、装置、终端、芯片和存储介质。
背景技术
当用户设备(User Equipment,UE)在多个信道上发送S-SSB时,可采用类型A(TypeA)或类型B(TypeB)的多信道接入方式在该多个信道上进行信道接入。在类型A的多信道接入过程中,UE需对该多个信道独立进行类型1(Type1)的信道接入,如果在其中任意一个或多个信道上接入成功,则UE可在该一个或多个信道上发送S-SSB。在类型B的多信道接入过程中,UE可在该多个信道中随机选择一个信道进行类型1的信道接入,其他信道进行类型2(Type2)的信道接入。若类型1的信道接入成功,则UE可在各个信道接入成功的信道上发送S-SSB;若类型1的信道接入失败,则该多个信道均被视为不可用。
在一些场景中,在发送S-SSB之前,可能会有其他UE将信道占用时间(Channel Occupancy Time,COT)共享给当前UE。若当前UE在该COT包含的信道上发送S-SSB,则可防止该COT资源被异系统用户抢占。
然而,上述类型A或类型B的多信道接入方式均不能有效避免COT资源被异系统用户抢占。例如,在UE采用类型A的多信道接入方式的情况下,UE在COT包含的信道上需执行类型1的信道接入,由于类型1的信道接入过程中信道侦听时间较长,故导致COT被异系统用户抢占的概率较大;又例如,在UE采用类型B的多信道接入方式的情况下,若UE在COT包含的其中一个信道上执行类型1的信道接入,由于类型1的信道接入过程中信道侦听时间较长,而其他信道能否用于发送S-SSB需依赖于该信道的信道接入结果,故同样导致COT被异系统用户抢占的概率较大。
发明内容
本申请实施例提供一种信道接入方法、装置、终端、芯片和存储介质。
第一方面,本申请实施例提供了一种信道接入方法,应用于第一终端,该方法包括:在一组信道中的至少一个第一信道上执行类型2的信道接入,在至少一个第一信道上执行类型2的信道接入得到的信道接入结果,用于确定至少一个第一信道是否可用于在第一时隙发送侧行链路同步信号块S-SSB;其中,该一组信道为计划用于在第一时隙发送S-SSB的信道,至少一个第一信道和第一时隙包含在信道占用时间COT内。
第二方面,本申请实施例提供了一种信道接入装置,该装置包括:处理单元,被配置为在一组信道中的至少一个第一信道上执行类型2的信道接入,在至少一个第一信道上执行类型2的信道接入得到的信道接入结果,用于确定至少一个第一信道是否可用于在第一时隙发送侧行链路同步信号块S-SSB;其中,该一组信道为计划用于在第一时隙发送S-SSB的信道,至少一个第一信道和第一时隙包含在信道占用时间COT内。
第三方面,本申请实施例提供了一种终端,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,执行上述的信道接入方法。
第四方面,本申请实施例提供了一种芯片,用于实现上述的信道接入方法。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,使得安装有该芯片的设备执行上述的信道接入方法。
第五方面,本申请实施例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的信道接入方法。
第六方面,本申请实施例提供了一种计算机程序产品,包括计算机程序指令,该计算机程序指令使得计算机执行上述的信道接入方法。
第七方面,本申请实施例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的信道接入方法。
通过上述技术方案,第一终端可在一组信道中的至少一个第一信道上执行类型2的信道接入,得到 的信道接入结果可用于确定该至少一个第一信道是否可用于在第一时隙发送S-SSB,其中,该一组信道为计划用于在第一时隙发送S-SSB的信道,且该至少一个第一信道和第一时隙包含在COT内。由于类型2信道接入过程中的信道侦听时长较短,因此,在COT包含的至少一个第一信道上执行类型2的信道接入,并基于该信道接入的结果确定该至少一个第一信道是否可用于S-SSB的发送,有利于提高第一终端成功接入该至少一个第一信道并在该至少一个第一信道上发送S-SSB的概率,从而有利于将COT资源维持占用,以避免COT资源丢失(如避免COT资源被异系统用户抢占)。
附图说明
此处所说明的附图用来提供对本申请的进一步理解,构成本申请的一部分,本申请的示意性实施例及其说明用于解释本申请,并不构成对本申请的不当限定。在附图中:
图1是本申请实施例提供的网络覆盖内的侧行通信的示意图;
图2是本申请实施例提供的部分网络覆盖的侧行通信的示意图;
图3是本申请实施例提供的网络覆盖外的侧行通信的示意图;
图4是本申请实施例提供的有中央控制节点的侧行通信的示意图;
图5是本申请实施例提供的单播传输方式的示意图;
图6是本申请实施例提供的组播传输方式的示意图;
图7是本申请实施例提供的广播传输方式的示意图;
图8是本申请实施例提供的NR-V2X中的时隙结构示意图;
图9是本申请实施例提供的一个PSSCH在不同传输中,所在时隙内可用的OFDM符号发生变化的示意图;
图10是本申请实施例提供的第二阶SCI的映射方式示意图;
图11是本申请实施例提供的PSCCH DMRS的时频域位置的示意图;
图12是本申请实施例提供的PSSCH为13个符号数时4个DMRS符号的时域位置示意图;
图13是本申请实施例提供的单符号DMRS频域类型1的示意图;
图14是本申请实施例提供的SL CSI-RS的时频位置示意图;
图15是本申请实施例提供的信道占用时间和信道占用的一例示意图;
图16是本申请实施例提供的S-SSB时频域映射示意图;
图17是本申请实施例提供的采用TypeA的多信道接入方式进行信道接入的示意图;
图18是本申请实施例提供的采用TypeB的多信道接入方式进行信道接入的示意图;
图19是本申请实施例提供的信道接入方法的流程示意图;
图20是本申请实施例提供的信道接入方法的实现方案的示意图一;
图21是本申请实施例提供的信道接入方法的实现方案的示意图二;
图22是本申请实施例提供的信道接入方法的实现方案的示意图三;
图23是本申请实施例提供的信道接入装置的结构组成示意图;
图24是本申请实施例提供的一种通信设备示意性结构图;
图25是本申请实施例的芯片的示意性结构图。
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。基于本申请中的实施例,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侧行通信系统,为便于理解本申请实施例的技术方案,以下对本申请实施例的相关技术进行说明,以下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。
1、不同网络覆盖环境下的侧行通信
在侧行通信中,根据进行通信的终端所处的网络覆盖情况,可以分为网络覆盖内的侧行通信、部分网络覆盖的侧行通信、网络覆盖外的侧行通信,以及有中央控制节点的侧行通信,分别如图1、图2、图3和图4所示。
如图1所示,在网络覆盖内的侧行通信中,所有进行侧行通信的终端均处于同一基站的覆盖范围内,从而,上述终端均可以通过接收基站的配置信令,基于相同的侧行配置进行侧行通信。
如图2所示,在部分网络覆盖的侧行通信的情况下,部分进行侧行通信的终端位于基站的覆盖范围内,这部分终端终端能够接收到基站的配置信令,而且根据基站的配置进行侧行通信。而位于网络覆盖范围外的终端,无法接收基站的配置信令,在这种情况下,网络覆盖范围外的终端将根据预配置(pre-configuration)信息及位于网络覆盖范围内的终端发送的侧行广播信道(Physical Sidelink Broadcast Channel,PSBCH)中携带的信息确定侧行配置,从而进行侧行通信。
如图3所示,对于网络覆盖外的侧行通信,所有进行侧行通信的终端均位于网络覆盖范围外,所有终端均根据预配置信息确定侧行配置并进行侧行通信。
如图4所示,对于有中央控制节点的侧行通信,多个终端构成一个通信组,该通信组内具有中央控制节点,如图4中的UE1。其中,中央控制节点又可以称为组头终端(Cluster Header,CH)。该中央控制节点具有但不限于以下功能中的至少之一:负责通信组的建立;组成员的加入、离开;进行资源协调,为其他终端分配侧行传输资源,接收其他终端的侧行反馈信息;与其他通信组进行资源协调。
2、设备到设备(Device to Device,D2D)/车联网(Vehicle to Everything,V2X)
设备到设备通信是基于D2D的一种侧行链路传输技术,与传统的蜂窝系统中通信数据通过基站接收或者发送的方式不同,因此具有更高的频谱效率以及更低的传输时延。车联网系统采用终端到终端直接通信的方式,第三代合作伙伴计划(3rd Generation Partnership Project,3GPP)定义了两种传输模式:第一模式和第二模式。
第一模式:终端的传输资源是由基站分配的,终端根据基站分配的资源在侧行链路上进行数据的发送;基站可以为终端分配单次传输的资源,也可以为终端分配半静态传输的资源。如图1中,终端位于网络覆盖范围内,网络为终端分配侧行传输使用的传输资源。
第二模式:终端在资源池中选取一个资源进行数据的传输。如图3中,终端位于小区覆盖范围外,终端在预配置的资源池中自主选取传输资源进行侧行传输;或者在图1中,终端在网络配置的资源池中自主选取传输资源进行侧行传输。
3、新无线-车联网(New Radio-Vehicle to Everything,NR-V2X)
在NR-V2X中,需要支持自动驾驶,因此对车辆之间数据交互提出了更高的要求,如更高的吞吐量、更低的时延、更高的可靠性、更大的覆盖范围、更灵活的资源分配等。
在LTE-V2X中,支持广播传输方式,在NR-V2X中,引入了单播和组播的传输方式。对于单播传输,其接收端终端只有一个终端,如图5中,UE1、UE2之间进行单播传输;对于组播传输,其接收端是一个通信组内的所有终端,或者是在一定传输距离内的所有终端,如图6所示,UE1、UE2、UE3和UE4构成一个通信组,其中UE1发送数据,该组内的其他终端设备都是接收端终端;对于广播传输方式,其接收端是发送端终端周围的任意一个终端,如图7所示,UE1是发送端终端,其周围的其他终端,UE2至UE6均为接收端终端。
4、NR-V2X系统帧结构
NR-V2X中的时隙结构如图8所示:
图8中的(a)图为时隙中不包括物理侧行反馈信道(Physical Sidelink Feedback Channel,PSFCH)的时隙结构示意图;图8中的(b)图为包括PSFCH信道的时隙结构示意图。
NR-V2X中物理侧行控制信道(Physical Sidelink Control Channel,PSCCH)在时域上从该时隙的第二个侧行符号开始,占用2个或3个正交频分复用(Orthogonal Frequency Divisition Multiplexing,OFDM)符号,在频域上可以占用{10,12 15,20,25}个物理资源块(Physical Resource Blocks,PRB)。为了降低用户设备(User Equipment,UE)对PSCCH的盲检测的复杂度,在一个资源池内只允许配置一个PSCCH符号个数和PRB个数。另外,因为子信道为NR-V2X中物理侧行共享信道(Physical Sidelink Shared Channel,PSSCH)资源分配的最小粒度,PSCCH占用的PRB个数必须小于或等于资源池内一个子信道中包含的PRB个数,以免对PSSCH资源选择或分配造成额外的限制。PSSCH在时域上也是从该时隙的第二个侧行符号开始,该时隙中的最后一个时域符号为保护间隔(Guard Period,GP)符号,其余符号映射PSSCH。该时隙中的第一个侧行符号是第二个侧行符号的重复,通常接收端终端将第一个侧行符号用作自动增益控制(Automatic Gain Control,AGC)符号,该符号上的数据通常不用于数据解调。PSSCH在频域上占据K个子信道,每个子信道包括N个连续的PRB。
当时隙中包含PSFCH信道时,该时隙中倒数第二个和倒数第三个符号用作PSFCH信道传输,在PSFCH信道之前的一个时域符号用作GP符号,如图8中的(b)图所示。
5、侧行链路PSSCH
在NR-V2X中,PSSCH用于承载第二阶侧行控制信息(Sidelink Control Information,SCI)(SCI 2-A或SCI 2-B)和数据信息。第二阶SCI采用极化(Polar)编码方式,固定采用正交相移键控(Quadrature Phase Shift Keying,QPSK)调制。PSSCH的数据部分采用低密度奇偶校验码(Low Density Parity Check, LDPC),支持的最高调制阶数为256QAM。
在NR-V2X中,PSSCH最多支持两个流传输,并且采用单位预编码矩阵将两个层上的数据映射到两个天线端口,在一个PSSCH中最多只能发送一个传输块(Transport Block,TB)。然而,和PSSCH数据部分的发送方式不同,当PSSCH采用双流发送方式时,第二阶SCI在两个流上发送的调制符号完全相同,这样的设计可以保证第二阶SCI在高相关信道下的接收性能。
由于在NR-V2X中一个PSSCH的最大重传次数为32次,如果资源池内存在PSFCH资源,而且PSFCH资源的配置周期为2或4,则一个PSSCH的不同传输所在的时隙内可用的OFDM符号可能会发生变化,如图9所示。如果按照一个时隙内真实的OFDM符号数计算可能会由于一个时隙内可用于PSSCH传输的符号个数不同导致Q′SCI2不同,而Q′SCI2的改变会导致PSSCH承载的TB的大小的变化。为了保证PSSCH多次传输中传输块大小(Transmission Block Size,TBS)保持不变,在计算时并没有采用真实的PSFCH符号数,另外在计算时,可能在重传过程中发生变化的PSSCH解调参考信号(Demodulation Reference Signal,DMRS)占用的资源单元(Resource Element,RE)个数和相位跟踪参考信号(Phase-Tracking Reference Signals,PT-RS)占用的RE个数也没有考虑在内。
第二阶SCI的码率可以在一定范围内动态调整,具体采用的码率由第一阶SCI指示,所以即使在码率改变后接收端也无需对第二阶SCI进行盲检测。第二阶SCI的调制符号从第一个PSSCH DMRS所在的符号采用先频域后时域的方式开始映射,在DMRS所在的OFDM符号上第二阶SCI映射到未被DMRS占用的RE上,如图10所示。
在一个资源池内PSSCH的数据部分可以采用多个不同的调制编码机制(Modulation and Coding Scheme,MCS)表格,包括常规64QAM MCS表格,256QAM MCS表格,和低频谱效率64QAM MCS表格,而在一次传输中具体采用的MCS表格由第一阶SCI中的“MCS表格指示”域指示。为了控制峰值平均功率比(Peak to Average Power Ratio,PAPR),PSSCH必须采用连续的PRB发送,由于子信道为PSSCH的最小频域资源粒度,这就要求PSSCH必须占用连续的子信道。
6、侧行传输块大小
PSSCH沿用了新无线(New Radio,NR)中物理下行共享信道(Physical Downlink Shared Channel,PDSCH)和物理上行共享信道(Physical Uplink Shared Channel,PUSCH)的传输块大小(TBS)确定机制,即根据PSSCH所在时隙内用于PSSCH的RE个数的参考值确定TBS,从而使得实际码率尽可能地接近目标码率。这里采用RE数的参考值而不是实际RE数的目的是为了保证PSSCH重传过程中用于确定TBS的RE数保持不变,从而使得确定的TBS大小相同。为了达到这一目的,在TBS确定过程中PSSCH占用RE数的参考值NRE按照公式(1)确定:
其中nPRB为PSSCH占用的PRB的个数,为第一阶SCI占用的RE个数(包括PSCCH的DMRS占用的RE),为第二阶SCI占用的RE个数,N′RE表示一个PRB内可用于PSSCH的参考RE数,由公式(2)确定:
其中:表示一个PRB内的子载波个数;表示一个时隙内可用于侧行的符号数,不包括最后一个GP符号和第一个用于AGC的符号。或3,具体值由第一阶SCI中的“PSFCH符号数”域指示,为PSFCH占用的符号数的参考值。的值由无线资源控制(Radio Resource Contro,RRC)层参数配置,用于表示PT-RS和CSI-RS占用RE数的参考值。表示一个时隙中的平均DMRS RE个数,和资源池内允许的DMRS图案有关,如表1所示。
表1资源池内允许的DMRS图案和的对应关系

7、侧行链路DMRS
在NR-V2X中,PSCCH的DMRS图案和NR物理下行控制信道(Physical Downlink Control Channel,PDCCH)相同,即DMRS存在于每一个PSCCH的OFDM符号上,在频域上位于一个PRB的{#1,#5,#9}个RE,如图11所示。PSCCH的DMRS序列通过公式(3)生成:
其中伪随机序列c(m)由进行初始化,这里l为DMRS所在OFDM符号在时隙内的索引,为DMRS所在时隙在系统帧内的索引,表示一个时隙内OFDM符号的个数,NID∈{0,1,…,65535},在一个资源池内NID的具体值由网络配置或预配置。
NR-V2X借鉴了NR Uu接口中的设计,采用了多个时域PSSCH DMRS图案。在一个资源池内,可采用的DMRS图案的个数和资源池内PSSCH的符号数有关,对于特定的PSSCH符号数(包括第一个AGC符号)和PSCCH符号数,可用的DMRS图案以及图案内每个DMRS符号的位置如表2所示。图12中给出了PSSCH为13个符号数时4个DMRS符号的时域位置示意图。
表2不同PSSCH和PSCCH符号数下DMRS符号个数及位置
如果资源池内配置了多个时域DMRS图案,则具体采用的时域DMRS图案由发送UE选择,并在第一阶SCI中予以指示。这样的设计允许高速运动的UE选择高密度的DMRS图案,从而保证信道估计的精度,而对于低速运动的UE,则可以采用低密度的DMRS图案,从而提高频谱效率。
PSSCH DMRS序列的生成方式和PSCCH DMRS序列的生成方式几乎完全相同,唯一的区别在于伪随机序列c(m)的初始化公式cinit中,pi为调度该PSSCH的PSCCH的第i位循环冗余校验(Cyclic Redundancy Check,CRC),L=24,为PSCCH CRC的比特位数。
NR PDSCH和PUSCH中支持两种频域DMRS图案,即DMRS频域类型1和DMRS频域类型2,而且对于每一种频域类型,均存在单DMRS符号和双DMRS符号两种不同类型。单符号DMRS频域类型1支持4个DMRS端口,单符号DMRS频域类型2可以支持6个DMRS端口,双DMRS符号情况下,支持的端口数均翻倍。然而,在NR-V2X中,由于PSSCH最多只需要支持两个DMRS端口,所以,仅支持单符号的DMRS频域类型1,如图13所示。
8、侧行链路信道状态信息参考信号(Channel State Information Reference Signal,CSI-RS)
为了更好地支持单播通信,NR-V2X中支持SL CSI-RS,SL CSI-RS只有满足以下3个条件时才会 发送:
1)UE发送对应的PSSCH,也就是说,UE不能只发送SL CSI-RS;
2)高层信令激活了侧行CSI上报;
3)在高层信令激活侧行CSI上报的情况下,UE发送的二阶SCI中的相应比特触发了侧行CSI上报。
SL CSI-RS支持的最大端口数为2,两个端口时不同端口的SL CSI-RS在同一个OFDM符号的相邻两个RE上通过码分的方式复用,在一个PRB内每个端口的SL CSI-RS的个数为1,即密度为1。所以,在一个PRB内SL CSI-RS最多只会出现在一个OFDM符号上,该OFDM符号的具体位置由发送终端确定。为了避免对PSCCH和第二阶SCI的资源映射造成影响,SL CSI-RS不能与PSCCH和第二阶SCI位于同一个OFDM符号。由于PSSCH DMRS所在OFDM符号的信道估计精度较高,而且两个端口的SL CSI-RS将在频域上占用两个连续的RE,所以SL-CSI-RS也不能和PSSCH的DMRS发送在同一个OFDM符号上。SL CSI-RS所在的OFDM符号的位置由PC5RRC中的sl-CSI-RS-FirstSymbol参数指示。
SL CSI-RS在一个PRB内占用的第一个RE的位置由PC5RRC中的sl-CSI-RS-FreqAllocation参数指示,如果SL CSI-RS为一个端口,该参数为长度为12的比特位图,对应一个PRB内的12个RE,如果SL CSI-RS为两个端口,该参数为长度为6的比特位图,在这种情况下SL CSI-RS占用2f(1)和2f(1)+1两个RE,其中f(1)表示值为1的比特在上述比特位图中的索引。SL CSI-RS的频域位置也由发送终端确定,但确定的SL CSI-RS的频域位置不能和PT-RS发生冲突。图14给出了一种SL CSI-RS的时频位置示意图,在图14中,SL CSI-RS端口数为2,sl-CSI-RS-FirstSymbol为8,sl-CSI-RS-FreqAllocation为[b5,b4,b3,b2,b1,b0]=[0,0,0,1,0,0]。
9、5G非授权(免授权)频谱通信(NR-unlicensed,NR-U)
3GPP R15标准引入的NR系统,是用于在已有的和新的授权频谱上使用的通信技术。NR系统可以实现蜂窝网络的无缝覆盖、高频谱效率、高峰值速率和高可靠性。在长期演进技术(Long Term Evolution,LTE)系统中,非授权频谱(或免授权频谱)作为授权频谱的补充频段用于蜂窝网络已经实现。同样,NR系统也可以使用非授权频谱,作为5G蜂窝网络技术的一部分,为用户提供服务。在3GPP R16标准中,讨论了用于非授权频谱上的NR系统,称为NR-unlicensed(NR-U)。
NR-U系统支持两种组网方式:授权频谱辅助接入和非授权频谱独立接入。前者需要借助授权频谱接入网络,非授权频谱作为辅载波使用;后者可以通过非授权频谱独立组网,UE可以直接通过非授权频谱接入网络。在3GPP R16中引入的NR-U系统使用的非授权频谱的范围集中与5GHz和6GHz频段,例如美国5925-7125MHz,或者欧洲5925-6425MHz。在R16的标准中,新定义了波段(band)46(5150MHz-5925MHz)作为非授权频谱使用。
非授权频谱是国家和地区划分的可用于无线电设备通信的频谱,该频谱通常被认为是共享频谱,即通信设备只要满足国家或地区在该频谱上设置的法规要求,就可以使用该频谱,而不需要向国家或地区的专属频谱管理机构申请专有的频谱授权。由于非授权频谱的使用需要满足各个国家和地区特定的法规的要求,如通信设备遵循“先听后说(Listen Before Talk,LBT)”的原则使用非授权频谱。因此NR技术需要进行相应的增强以适应非授权频段的法规要求,同时高效的利用非授权频谱提供服务。在3GPP R16标准中,主要完成了以下方面的NR-U技术的标准化:信道监听过程;初始接入过程;控制信道设计;混合自动重传请求(Hybrid Automatic Repeat reQuest,HARQ)与调度;免调度授权传输等。
10、信道监听:LBT
为了让使用非授权频谱进行无线通信的各个通信系统在该频谱上能够友好共存,一些国家或地区规定了使用非授权频谱必须满足的法规要求。例如,根据欧洲地区的法规,在使用非授权频谱进行通信时,通信设备遵循“LBT”原则,即通信设备在使用非授权频谱上的信道进行信号发送前,需要先进行LBT,或者说,信道监听。只有当信道监听结果为信道空闲或者说LBT成功时,该通信设备才能通过该信道进行信号发送;如果通信设备在该信道上的信道监听结果为信道忙或者说LBT失败,那么该通信设备不能通过该信道进行信号发送。另外,为了保证共享频谱的频谱资源使用的公平性,如果通信设备在非授权频谱的信道上LBT成功,该通信设备可以使用该信道进行通信传输的时长不能超过一定的时长。该机制通过限制一次LBT成功后可以进行通信的最大时长,可以使不同的通信设备都有机会接入该共享信道,从而使不同的通信系统在该共享频谱上友好共存。
虽然信道监听并不是全球性的法规规定,然而由于信道监听能为共享频谱上的通信系统之间的通信传输带来干扰避免以及友好共存的好处,在非授权频谱上的NR系统的设计过程中,信道监听是该系统中的通信设备必须要支持的特性。从系统的布网角度,信道监听包括两种机制,一种是基于负载的设备(Load Based Equipment,LBE)的LBT,也称为动态信道监听或动态信道占用,另一种是基于帧结构的设备(Frame Based Equipment,FBE)的LBT,也称为半静态信道监听或半静态信道占用。
11、动态信道监听
动态信道监听也可以认为是基于LBE的LBT方式,其信道监听原则是通信设备在业务到达后进行非授权频谱的载波上的LBT,并在LBT成功后在该载波上开始信号的发送。动态信道监听的LBT方式包括类型1(Type1)信道接入方式和类型2(Type2)信道接入方式。Type1信道接入方式为基于竞争窗口大小调整的随机回退的多时隙信道检测,其中,根据待传输业务的优先级可以选择对应的信道接入优先级(Channel Access Priority Class,CAPC)p。Type2信道接入方式为基于固定长度的监听时隙的信道接入方式,其中,Type2信道接入方式包括Type2A信道接入、Type2B信道接入和Type2C信道接入。Type1信道接入方式主要用于通信设备发起信道占用,Type2信道接入方式主要用于通信设备共享信道占用。需要说明的一种特殊情况是,当基站为传输发现参考信号(Discover Reference Symbol,DRS)窗口内的同步信号/物理广播信道(Synchronization Signal/Physical Broadcast Channel,SS/PBCH)块发起信道占用且DRS窗口内不包括UE的单播数据传输时,如果DRS窗口的长度不超过1ms而且DRS窗口传输的占空比不超过1/20,那么基站可以使用Type2A信道接入发起信道占用。
图15中给出了通信设备在非授权频谱的信道上LBT成功后获得的一次信道占用时间以及使用该信道占用时间内的资源进行信号传输的示例。
12、基站侧默认信道接入方式:Type1信道接入
以基站为例,基站侧的信道接入优先级p对应的信道接入参数如表3所示。在表3中,mp是指信道接入优先级p对应的回退时隙个数,CWp是指信道接入优先级p对应的竞争窗口(Contention Window,CW)大小,CWmin,p是指信道接入优先级p对应的CWp取值的最小值,CWmax,p是指信道接入优先级p对应的CWp取值的最大值,Tmcot,p是指信道接入优先级p对应的信道最大占用时间长度。
如果信道接入过程结束,那么基站可以使用该信道进行待传输业务的传输。基站可以使用该信道进行传输的最大时间长度不能超过Tmcot,p
表3不同信道接入优先级p对应的信道接入参数
13、基站侧的信道占用时间共享
当基站发起信道占用时间(Channel Occupancy Time,COT)后,除了可以将该COT内的资源用于下行传输,还可以将该COT内的资源共享给UE进行上行传输。COT内的资源共享给UE进行上行传输时,UE可以使用的信道接入方式为Type2A信道接入、Type2B信道接入或Type2C信道接入,其中,Type2A信道接入、Type2B信道接入和Type2C信道接入均为基于固定长度的监听时隙的信道接入方式。
Type2A信道接入:
UE的信道检测方式为25μs的单时隙信道检测。具体地,Type2A信道接入下,UE在传输开始前可以进行25μs的信道监听,并在信道监听成功后进行传输。
Type2B信道接入:
UE的信道检测方式为16μs的单时隙信道检测。具体地,Type2B信道接入下,UE在传输开始前可以进行16μs的信道监听,并在信道监听成功后进行传输。其中,该传输的起始位置距离上一次传输的结束位置之间的空隙大小为16μs。
Type2C信道接入:
UE在空隙结束后不做信道检测而进行传输。具体地,Type2C信道接入下,UE可以直接进行传输,其中,该传输的起始位置距离上一次传输的结束位置之间的空隙大小为小于或等于16μs。其中,该传输的长度不超过584μs。
14、多信道接入(Channel access for transmission(s)on multiple channels)
当系统支持多信道(多RB集合)时,UE需要在多个信道上分别进行信道接入,即LBT信道侦听。当采用NR-U下行(Downlink,DL)多信道接入机制时,UE可以在任意信道接入成功的信道上进行发送。在侧行非授权系统中,对于PSFCH和S-SSB的发送,支持如下多信道接入的方式:
1)TypeA多信道接入
当UE要在C个信道(RB集合)上发送PSFCH或S-SSB时,UE需对C个信道中的每一个信道独立进行Type1信道接入过程。如果在其中任意一个或多个信道上接入成功,那么UE就可以在该一个或多个对应的信道上发送PSFCH或S-SSB。
2)TypeB多信道接入
当UE要在C个信道(RB集合)上发送PSFCH或S-SSB时,UE可在C个信道中随机选择一个信道采用Type1信道接入,剩下其他信道采用Type2信道接入。当Type1信道接入成功后,UE才可以在Type2信道接入成功的信道进行发送;如果Type1信道接入失败,那么采用Type2信道接入的信道都被视为不可用。
15、信道接入参数指示(含循环前缀扩展(Cyclic Prefix Extension,CPE))
在NR-U系统中,当UE被调度进行物理上行共享信道(Physical Uplink Shared Channel,PUSCH)或物理上行控制信道(Physical Uplink Control Channel,PUCCH)的传输时,基站可以通过携带上行授权(UL grant)或下行授权(DL grant)的下行控制信息(Downlink Control Information,DCI)来指示该PUSCH或PUCCH对应的信道接入方式。由于一些信道接入方式需要满足16μs或25μs的空隙要求,UE可以通过传输延长循环前缀(CPE)的方式来确保两次传输之间的空隙大小,相应地,基站可以指示UE的上行传输的第一个符号的CPE长度。
在具体指示时,基站可以通过联合编码的方式向UE显式指示CPE长度、信道接入方式或信道接入优先级等信道接入参数。下面介绍不同DCI格式下引入的信道接入参数的指示方式的特征。
1)调度PUSCH传输的回退上行授权(DCI格式0_0):
标准中预设信道接入方式和CPE长度联合指示的集合,如表4所示。该回退上行授权中包括2比特LBT指示信息,该2比特LBT指示信息用于从表4所示的集合中指示联合编码的信道接入方式和CPE长度。该信道接入方式和CPE长度用于PUSCH传输。如果信道接入方式为Type1信道接入,UE根据业务优先级自行选择信道接入优先级CAPC)。
2)调度PDSCH传输的回退下行授权(DCI格式1_0):
标准中预设信道接入方式和CPE长度联合指示的集合,如表4所示。该回退下行授权中包括2比特LBT指示信息,该2比特LBT指示信息用于从表4所示的集合中指示联合编码的信道接入方式和CPE长度。该信道接入方式和CPE长度用于PUCCH传输,其中,该PUCCH可以承载PDSCH对应的肯定应答(ACKnowledgement,ACK)或否定应答(Negative ACKnowledgement,NACK)。如果信道接入方式为Type1信道接入,UE确定用于传输PUCCH的信道接入优先级CAPC=1。
表4信道接入方式和CPE长度联合指示集合
在表4中,C1的取值是协议规定的,子载波间隔为15kHz和30kHz时,C1=1;子载波间隔为60kHz时,C1=2。C2和C3的取值是高层参数配置的,子载波间隔为15kHz和30kHz时,C2和C3取值范围为1到28;子载波间隔为60kHz时,C2和C3取值范围为2到28。
3)调度PUSCH传输的非回退上行授权(DCI格式0_1):
高层配置LBT参数指示集合,LBT参数指示集合中包括至少一项联合编码的信道接入方式,CPE长度和CAPC。该非回退上行授权中包括LBT指示信息,该LBT指示信息用于从上述LBT参数指示集合中指示联合编码的信道接入方式,CPE长度和CAPC。该信道接入方式,CPE长度和CAPC用于PUSCH传输。如果指示的信道接入方式是Type2信道接入,则同时指示的CAPC是基站获得该COT时使用的CAPC。LBT指示信息最多包括6比特。
4)调度PDSCH传输的非回退下行授权(DCI格式1_1):
高层配置LBT参数指示集合,LBT参数指示集合中包括至少一项联合编码的信道接入方式和CPE长度。该非回退下行授权中包括LBT指示信息,该LBT指示信息用于从上述LBT参数指示集合中指示联合编码的信道接入方式和CPE长度。该信道接入方式和CPE长度用于PUCCH传输,其中,该PUCCH可以承载PDSCH对应的ACK或NACK信息。如果信道接入方式为Type1信道接入,UE确定用于传输PUCCH的信道接入优先级CAPC=1。LBT指示信息最多包括4比特。
除了上述显式指示,基站还可以隐式指示COT内的信道接入方式。当UE收到基站发送的UL grant或DL grant指示该PUSCH或PUCCH对应的信道接入类型为Type1信道接入时,如果UE能确定该 PUSCH或PUCCH属于基站的COT内,例如UE收到基站发送的DCI格式2_0,并根据该DCI格式2_0确定该PUSCH或PUCCH属于基站的COT内,那么UE可以将该PUSCH或PUCCH对应的信道接入类型更新为Type2A信道接入而不再采用Type1信道接入。
16、S-SSB时频域映射
根据目前R18SL技术的结论,S-SSB在时频域的映射如图16所示。在一个S-SSB周期(160ms)内,包含第一类S-SSB和第二类S-SSB,第一类S-SSB是R16/R17SL配置的S-SSB时隙资源,第二类S-SSB是R18新定义的额外的S-SSB时隙资源。一个S-SSB时隙对应的频域资源上,如果频域包含4个资源块(Resource Block,RB)集合,UE可以尝试在其中一个或多个RB集合上映射/传输S-SSB。这里尝试是指UE需要在一个RB集合上先执行LBT,如果检测到这个RB集合没有被占用/可用,则在该RB集合上映射/发送S-SSB,如果需要在多个RB集合上发送,那么对该多个RB集合分别进行LBT,根据各个RB集合上的LBT结果来决定能否在对应的RB集合上发送S-SSB。在一个RB集合内,S-SSB在频域是重复映射的。在一个时隙对应的多个RB集合上,S-SSB也是在每个RB集合内重复的。
此外,根据目前的结论,每一个R16/R17的S-SSB时隙都对应有K个额外的S-SSB时隙,这些S-SSB时隙之间的间隔是需要通过配置或预配置获取的。
上面对本申请实施例中涉及到的相关技术/术语做了简单说明,下文实施例中不再赘述。
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。还应理解,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。还应理解,在本申请的实施例中提到的“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。还应理解,在本申请的实施例中提到的“预定义”或“预定义规则”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。还应理解,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。
还应理解,本申请实施例对于终端的具体形态不做限定。作为示例,本申请实施例中的终端可以指接入终端、用户设备(User Equipment,UE)、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、终端设备、无线通信设备、用户代理或用户装置。接入终端可以是蜂窝电话、无绳电话、会话启动协议(Session Initiation Protocol,SIP)电话、IoT设备、卫星手持终端、无线本地环路(Wireless Local Loop,WLL)站、个人数字处理(Personal Digital Assistant,PDA)、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、5G网络中的终端设备或者未来演进网络中的终端设备等。
在目前的SL非授权频段技术中,当UE在单信道上发送S-SSB时,需在该单信道上进行信道接入,支持的信道接入方式包括类型1(Type1)和类型2A(Type2A)的信道接入方式;当UE在多个信道上发送S-SSB时,需在该多个信道上分别进行信道接入,支持的多信道接入方式包括类型A(TypeA)和类型B(TypeB)的信道接入方式。
在TypeA的多信道接入过程中,UE需对该多个信道独立进行Type1的信道接入,如果在其中任意一个或多个信道上接入成功,则UE可在该一个或多个信道上发送S-SSB。在TypeB的多信道接入过程中,UE可在该多个信道中随机选择一个信道进行Type1的信道接入,其他信道进行Type2的信道接入。若Type1的信道接入成功,则UE可在各个信道接入成功的信道上发送S-SSB;若Type1的信道接入失败,则该多个信道均被视为不可用。
在一些场景中,在发送S-SSB之前,可能会有其他UE将COT共享给当前UE。若当前UE在该COT包含的信道上发送S-SSB,则可防止该COT资源被异系统用户抢占。然而,上述TypeA或TypeB的多信道接入方式均不能有效避免COT资源被异系统用户抢占。下面以图17和图18为例进行说明。
图17示出了在有其他UE将COT共享给当前UE的场景下,采用TypeA的多信道接入方式进行信道接入的一例示意图。如图17所示,UE在每个信道/RB集合(set)分别独立采用Type1的信道接入方式进行LBT信道侦听,在该过程中,有其他UE将COT共享给当前UE,且该COT内包含信道#2(RB集合#2)和信道#3(RB集合#3)。根据现有机制,由于Type1信道接入过程的信道侦听时长很长,远远大于Type2A的信道侦听时长(25μs),若采用Type1信道接入则会导致COT丢失,因此规定在COT 内需采用Type2信道接入。此时,如果UE仍然按照预先的计划采用Type1信道接入,则无法使用COT时长内的时频资源。如此一来,COT丢失概率大大增加,从而造成资源浪费。另一方面,信道侦听时间越长,资源越容易被占用(例如被异系统UE占用)。也就是说,若此时其他UE(如异系统UE)采用较短侦听时长的Type2A的信道接入方式在信道#2和信道#3上进行信道接入,将有很高的概率抢占该COT资源,这样,当前UE不得不摒弃已有COT。若当前UE摒弃已有COT,并采用Type1信道侦听方式重新发起COT,则会导致已有的COT资源被浪费。
图18示出了在有其他UE将COT共享给当前UE的场景下,采用TypeB的多信道接入方式进行信道接入的一例示意图。如图18所示,UE在一组信道/RB集合中选择一个信道采用Type1信道接入,其他信道采用Type2信道接入。例如,UE选择信道#2(RB集合#2)采用Type1信道接入,信道#0(RB集合#0)、信道#1(RB集合#1)和信道#3(RB集合#3)采用Type2信道接入,并且采用Type2信道接入的信道能否用于发送S-SSB需要依赖于Type1信道接入在信道#2上是否成功,也就是说,不同信道之间的信道接入关联度很高。如果UE预先计划在信道#2上采用Type1信道接入,并且在已经开始进行信道侦听后才出现COT共享资源,则无法由Type1信道接入转变为Type2信道接入,这样,若此时其他UE(如异系统UE)采用较短侦听时长的Type2A的信道接入方式在信道#2上进行信道接入,将有很高的概率导致当前UE在信道#2上信道接入失败,从而导致信道#2和信道#3均无法发送S-SSB,进而导致COT丢失。
在现有机制中,支持S-SSB在多个信道/RB集合上传输的目的是为了当有COT共享资源时,UE除了可在锚点信道/锚点RB集合上发送S-SSB以外,还可以在COT包含的信道/RB集合上发送S-SSB,以此将COT资源维持占用,以避免该COT资源被异系统的UE抢占,从而保证当前侧行系统的资源使用效率。但现有机制规定的TypeA和TypeB的多信道接入机制,对于发送S-SSB之前出现COT共享资源的场景,并没有有效的方法来维持COT的占用,造成COT丢失(如COT被异系统UE抢占)的概率较大。这与在多个信道/RB集合上发送S-SSB的初衷相违背,因此,对于发送S-SSB之前出现COT共享资源的场景,如何避免COT丢失是亟需解决的问题。
鉴于此,本申请提供一种信道接入方法、装置、终端、芯片和存储介质。在该方法中,第一终端可在一组信道中的至少一个第一信道上执行类型2(Type2)的信道接入,得到的信道接入结果可用于确定该至少一个第一信道是否可用于在第一时隙发送S-SSB,其中,该一组信道为计划用于在第一时隙发送S-SSB的信道,且该至少一个第一信道和第一时隙包含在COT内。
根据本申请实施例的方法,由于类型2信道接入过程中的信道侦听时长较短,因此,在COT包含的至少一个第一信道上执行类型2的信道接入,并基于该信道接入的结果确定该至少一个第一信道是否可用于S-SSB的发送,如此,有利于提高第一终端成功接入该至少一个第一信道并在该至少一个第一信道上发送S-SSB的概率,从而有利于将COT资源维持占用,以避免COT资源丢失(如避免COT资源被异系统用户抢占)。
需要说明的是,在本申请实施例中,“执行信道接入”还可以替换为“执行LBT”或“执行信道侦听”。在一些场景中,本申请实施例的中“信道(如第一信道)”还可以替换为“RB集合(如第一RB集合)”。
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19是本申请实施例提供的信道接入方法的流程示意图。如图19所示,该方法可包括以下步骤:
S1901,第一终端在一组信道中的至少一个第一信道上执行类型2的信道接入,在该至少一个第一信道上执行类型2的信道接入得到的信道接入结果,用于确定该至少一个第一信道是否可用于在第一时隙发送S-SSB;其中,该一组信道为计划用于在第一时隙发送S-SSB的信道,该至少一个第一信道和第一时隙包含在COT内。
其中,计划用于在第一时隙发送S-SSB的信道,还可以理解为,预先确定/决定的将用于在第一时隙发送S-SSB的信道。也就是说,对于预先确定的将用于在第一时隙发送S-SSB的一组信道,第一终端可在该一组信道中的至少一个第一信道上采用类型2(如Type2A、Type2B或Type2C)的信道接入方式进行信道接入,且该至少一个第一信道包含在COT内。
进一步地,第一终端在该至少一个第一信道上执行类型2的信道接入得到的信道接入结果,可用于确定该至少一个第一信道是否可用于在第一时隙发送S-SSB。例如,对于该至少一个第一信道中的某个第一信道,若第一终端在该第一信道上执行类型2的信道接入的结果为成功,则第一终端可在该第一信道上发送S-SSB,发送S-SSB的时隙为第一时隙;若第一终端在该第一信道上执行类型2的信道接入的结果为失败,则第一终端无法在第一时隙在该第一信道上发送S-SSB。
在一些实施例中,由于在一个信道内,S-SSB在频域是重复映射的,也即,S-SSB在一个信道内可以重复多次(重复映射多次),因此,在某个信道上发送S-SSB,还可以理解为,在该信道上发送多个重复的S-SSB。
根据上述技术方案,第一终端可在至少一个第一信道上执行类型2的信道接入,并且得到的信道接入结果,可用于确定该至少一个第一信道是否可用于在第一时隙发送S-SSB。由于类型2信道接入过程中的信道侦听时长较短,因此,在COT包含的至少一个第一信道上执行类型2的信道接入,并基于该信道接入的结果确定该至少一个第一信道是否可用于S-SSB的发送,有利于提高第一终端成功接入该至少一个第一信道并在该至少一个第一信道上发送S-SSB的概率,从而有利于将COT资源维持占用,以避免COT资源丢失(如避免COT资源被异系统用户抢占)。此外,若第一终端在某个第一信道上执行类型2的信道接入的结果为成功,则第一终端可在该第一信道上发送S-SSB,也就是说,各个第一信道是否可用于在第一时隙发送S-SSB,可以不需要依赖于其他某个信道的信道接入结果是否为成功,或者说,各个第一信道的信道接入可独立进行,从而进一步提高了第一终端成功接入该至少一个第一信道并在该至少一个第一信道上发送S-SSB的概率,进而提升了S-SSB的发送/检测效果。
在一些实施例中,在第一时刻之前,对于该至少一个第一信道中的全部或部分第一信道,计划采用的信道接入方式可以为类型1的信道接入。其中,第一时刻为第一终端获取COT的时频信息的时刻。
也就是说,在第一终端获取到COT的时频信息之前,第一终端可计划/预先计划在该全部或部分第一信道上执行类型1的信道接入;若第一终端获取到COT的时频信息,则第一终端可在第一时隙之前,或者说,在发送S-SSB之前,在该全部或部分第一信道上改为采用类型2的信道接入,以提高信道接入的成功概率,进而减小COT丢失的概率。
在一些实施例中,若在第一时刻,第一终端已开始在该全部或部分第一信道上执行类型1的信道接入,则在第一时刻,第一终端可停止执行该类型1的信道接入。
也就是说,若第一终端在获取到COT的时频信息时,已开始按照预先的计划在该全部或部分第一信道上执行类型1的信道接入,则第一终端可在获取到COT的时频信息时,停止在该全部或部分第一信道上执行类型1的信道接入,并可放弃在执行该类型1的信道接入的过程中已获取到的部分/全部信道侦听结果。进一步地,第一终端可等到第一时隙之前,在该全部或部分第一信道上执行类型2的信道接入,以提高信道接入的成功概率,进而减小COT丢失的概率。
在一些实施例中,若在第一时刻,第一终端未开始在该全部或部分第一信道上执行类型1的信道接入,则第一终端可不执行该类型1的信道接入。
也就是说,若第一终端在获取到COT的时频信息时,尚未按照预先的计划在该全部或部分第一信道上执行类型1的信道接入,则等到原定的(预先计划的)开始执行该类型1的信道接入的时刻,第一终端可以不需要在该全部或部分第一信道上执行该类型1的信道接入,而是等到第一时隙之前,在该全部或部分第一信道上执行类型2的信道接入,以提高信道接入的成功概率,进而减小COT丢失的概率。
需要说明的是,在本申请实施例中,开始执行类型1的信道接入,还可以理解为,开始实施类型1信道接入的信道侦听过程,或者还可以理解为,开始执行类型1的信道侦听。
在一些实施例中,第一时刻(第一终端获取COT的时频信息的时刻)与第一时隙之间的时间间隔,大于或等于执行类型2的信道接入所需的时长。在一些场景中,执行类型2的信道接入所需的时长,还可以理解为,采用类型2的信道接入方式进行信道侦听所需的时长。
可以理解的是,若第一时刻与第一时隙之间的时间间隔,大于或等于执行类型2的信道接入所需的时长,则说明在第一终端获取到COT的时频信息的情况下,在第一时隙之前,第一终端有足够的时间执行类型2的信道接入,故在该情况下,第一终端可停止在该全部或部分第一信道上正在执行的类型1的信道接入,或者,可不按照预先的计划在该全部或部分第一信道上执行类型1的信道接入,而是等到第一时隙之前,在该全部或部分第一信道上执行类型2的信道接入。
在一些实施例中,若第一时刻与第一时隙之间的时间间隔,小于执行类型2的信道接入所需的时长,则说明在第一终端获取到COT的时频信息的情况下,在第一时隙之前,第一终端不足以实施类型2的信道接入,故在该情况下,第一终端可按照预先的计划在该全部或部分第一信道上执行类型1的信道接入。
在一些实施例中,该方法还可以包括:第一终端确定/判断第一时刻与第一时隙之间的时间间隔,是否大于或等于执行类型2的信道接入所需的时长。从而,第一终端可基于该判断结果,决定是否按照预先的计划在该全部或部分第一信道上执行类型1的信道接入。
在一些实施例中,上述全部或部分第一信道为该一组信道中的非锚点信道。也即,第一终端预先计划的将执行类型1信道接入的信道,可以是该一组信道中的非锚点信道。
在一些实施例中,对于该一组信道中的锚点信道,第一终端可采用类型2的信道接入方式执行信道 接入。由于在一些场景中,与第一终端进行通信的设备有可能为弱能力设备(如弱能力终端),而弱能力设备可能无法在除锚点信道以外的信道上接收S-SSB,因此,第一终端通过在锚点信道上执行类型2的信道接入,可提高成功接入该锚点信道并在该锚点信道上发送S-SSB的概率,进而可提高弱能力设备接收到第一终端发送的S-SSB的概率。
在一些实施例中,该方法还可以包括:在该一组信道中的至少一个第二信道上执行类型1的信道接入;其中,COT不包含至该少一个第二信道;在该至少一个第二信道上执行类型1的信道接入得到的信道接入结果,用于确定该至少一个第二信道是否可用于在第一时隙发送S-SSB。
也就是说,对于未包含在COT内的至少一个第二信道,第一终端可在该至少一个第二信道上执行类型1的信道接入。例如,在第一时刻之前,第一终端已计划在该至少一个第二信道上执行类型1的信道接入,那么,等到预先计划的开始执行该类型1的信道接入的时刻,第一终端即可按照预先的计划在该至少一个第二信道上执行类型1的信道接入。
示例性地,在该至少一个第二信道上执行类型1的信道接入得到的信道接入结果,可用于确定该至少一个第二信道是否可用于在第一时隙发送S-SSB。例如,对于该至少一个第二信道中的某个第二信道,若第一终端在该第二信道上执行类型1的信道接入的结果为成功,则第一终端可在该第二信道上发送S-SSB,发送S-SSB的时隙为第一时隙;若第一终端在该第二信道上执行类型1的信道接入的结果为失败,则第一终端无法在第一时隙在该第二信道上发送S-SSB。
根据上述技术方案,若第一终端在某个第二信道上执行类型1的信道接入的结果为成功,则第一终端可在该第二信道上发送S-SSB,也就是说,各个第二信道是否可用于在第一时隙发送S-SSB,可以不需要依赖于其他某个信道的信道接入结果是否为成功,或者说,各个第二信道的信道接入可独立进行,从而提高了第一终端成功接入该至少一个第二信道并在该至少一个第二信道上发送S-SSB的概率,进而提升了S-SSB的发送/检测效果。
在一些实施例中,该至少一个第二信道为该一组信道中的非锚点信道。也即,第一终端可在该一组信道中的非锚点信道中,选择至少一个第二信道执行类型1的信道接入。
在一些实施例中,该方法还可以包括:在该一组信道中的至少一个第三信道上执行类型2的信道接入;其中,COT不包含该至少一个第二信道;在该至少一个第三信道上执行类型2的信道接入得到的信道接入结果,可用于确定至少一个第三信道是否可用于在第一时隙发送S-SSB。
也就是说,对于未包含在COT内的至少一个第三信道,第一终端可在该至少一个第三信道上执行类型2的信道接入。例如,在第一时刻之前,第一终端已计划在该至少一个第三信道上执行类型2的信道接入,那么,等到预先计划的开始执行该类型2的信道接入的时刻,第一终端即可按照预先的计划在该至少一个第三信道上执行类型2的信道接入。
示例性地,在该至少一个第三信道上执行类型2的信道接入得到的信道接入结果,可用于确定该至少一个第三信道是否可用于在第一时隙发送S-SSB。例如,对于该至少一个第三信道中的某个第三信道,若第一终端在该第三信道上执行类型2的信道接入的结果为成功,则第一终端可在该第三信道上发送S-SSB,发送S-SSB的时隙为第一时隙;若第一终端在该第三信道上执行类型2的信道接入的结果为失败,则第一终端无法在第一时隙在该第三信道上发送S-SSB。
根据上述技术方案,若第一终端在某个第三信道上执行类型2的信道接入的结果为成功,则第一终端可在该第三信道上发送S-SSB,也就是说,各个第三信道是否可用于在第一时隙发送S-SSB,可以不需要依赖于其他某个信道的信道接入结果是否为成功,或者说,各个第三信道的信道接入可独立进行,从而提高了第一终端成功接入该至少一个第三信道并在该至少一个第三信道上发送S-SSB的概率,进而提升了S-SSB的发送/检测效果。
在一些实施例中,在第一时刻(第一终端获取COT的时频信息的时刻)之前,对于上述至少一个第一信道中的其中一个第一信道(例如记为目标第一信道),计划采用的信道接入方式可以为类型1的信接入。
也就是说,在第一终端获取到COT的时频信息之前,第一终端可计划/预先计划在目标第一信道上执行类型1的信道接入;若第一终端获取到COT的时频信息,则第一终端可第一时隙之前,在目标第一信道上改为采用类型2的信道接入。对于该至少一个第一信道中的其他第一信道(除目标第一信道之外的其他第一信道),第一终端可按照预先的计划在第一时隙之前执行类型2的信道接入。如此,有利于提高第一终端成功接入该COT所包含的第一信道的概率,从而有利于避免该COT资源的丢失。
在一些实施例中,若在第一时刻,第一终端已开始在目标第一信道上执行类型1的信道接入,则在第一时刻,第一终端可停止执行该类型1的信道接入。
也就是说,若第一终端在获取到COT的时频信息时,已开始按照预先的计划在目标第一信道上执行类型1的信道接入,则第一终端可在获取到COT的时频信息时,停止在该目标第一信道上执行类型 1的信道接入,并可放弃在执行该类型1的信道接入的过程中已获取到的部分/全部信道侦听结果。进一步地,第一终端可等到第一时隙之前,在该目标第一信道上执行类型2的信道接入,以提高信道接入的成功概率,进而减小COT丢失的概率。
在一些实施例中,若在第一时刻,第一终端未开始在目标第一信道上执行类型1的信道接入,则第一终端可不执行该类型1的信道接入。
也就是说,若第一终端在获取到COT的时频信息时,尚未按照预先的计划在目标第一信道上执行类型1的信道接入,则等到原定的(预先计划的)开始执行该类型1的信道接入的时刻,第一终端可以不需要在目标第一信道上执行该类型1的信道接入,而是等到第一时隙之前,在目标第一信道上执行类型2的信道接入,以提高信道接入的成功概率,进而减小COT丢失的概率。
在一些实施例中,第一时刻(第一终端获取COT的时频信息的时刻)与第一时隙之间的时间间隔,大于或等于执行类型2的信道接入所需的时长。
可以理解的是,若第一时刻与第一时隙之间的时间间隔,大于或等于执行类型2的信道接入所需的时长,则说明在第一终端获取到COT的时频信息的情况下,在第一时隙之前,第一终端有足够的时间执行类型2的信道接入,故在该情况下,第一终端可停止在目标第一信道上正在执行的类型1的信道接入,或者,可不按照预先的计划在目标第一信道上执行类型1的信道接入,而是等到第一时隙之前,在目标第一信道上执行类型2的信道接入。
在一些实施例中,若第一时刻与第一时隙之间的时间间隔,小于执行类型2的信道接入所需的时长,则说明第一终端在获取到COT的时频信息的情况下,在第一时隙之前,第一终端不足以实施类型2的信道接入,故在该情况下,第一终端可按照预先的计划在目标第一信道上执行类型1的信道接入。
在一些实施例中,该方法还可以包括:第一终端确定/判断第一时刻与第一时隙之间的时间间隔,是否大于或等于执行类型2的信道接入所需的时长。从而,第一终端可基于该判断结果,决定是否按照预先的计划在目标第一信道上执行类型1的信道接入。
在一些实施例中,目标第一信道为该一组信道中的其中一个非锚点信道。也即,第一终端可在该一组信道中的非锚点信道中,选择一个信道(如目标第一信道)执行类型1的信道接入。
在一些实施例中,在上述至少一个第一信道上执行类型2的信道接入得到的信道接入结果,包括:在目标第一信道上执行类型2的信道接入得到的第一信道接入结果;在第一信道接入结果为成功的情况下,在该至少一个第一信道上执行类型2的信道接入得到的信道接入结果,可用于确定该至少一个第一信道是否可用于在第一时隙发送S-SSB。
也就是说,若第一终端在目标第一信道上执行类型2的信道接入的结果为成功,则第一终端可基于在该至少一个第一信道上执行类型2的信道接入得到的信道接入结果,确定该至少一个第一信道是否可用于在第一时隙发送S-SSB。
在一些实施例中,该方法还可以包括:在该一组信道中的至少一个第四信道上执行类型2的信道接入;其中,COT不包含该至少一个第四信道;在第一信道接入结果为成功的情况下,在该至少一个第四信道上执行类型2的信道接入得到的信道接入结果,可用于确定该至少一个第四信道是否可用于在第一时隙发送S-SSB。
也就是说,对于未包含在COT内的至少一个第四信道,第一终端可在该至少一个第四信道上执行类型2的信道接入。例如,在第一时刻之前,第一终端已计划在该至少一个第四信道上执行类型2的信道接入,那么,等到预先计划的开始执行该类型2的信道接入的时刻,第一终端即可按照预先的计划在该至少一个第四信道上执行类型2的信道接入。
示例性地,在第一信道接入结果为成功的情况下,在该至少一个第四信道上执行类型2的信道接入得到的信道接入结果,可用于确定该至少一个第四信道是否可用于在第一时隙发送S-SSB。例如,在第一信道接入结果为成功的情况下,对于该至少一个第四信道中的某个第四信道,若第一终端在该第四信道上执行类型2的信道接入的结果为成功,则第一终端可在该第四信道上发送S-SSB,发送S-SSB的时隙为第一时隙;若第一终端在该第四信道上执行类型2的信道接入的结果为失败,则第一终端无法在第一时隙在该第四信道上发送S-SSB。
在一些实施例中,在第一信道接入结果为失败的情况下,该一组信道不用于在第一时隙发送S-SSB。也就是说,至少一个第一信道和/或至少一个第四信道是否可用于在第一时隙发送S-SSB,需要依赖于第一信道接入结果是否为成功。例如,若第一信道接入结果为成功,则至少一个第一信道和/或至少一个第四信道可用于在第一时隙发送S-SSB;若第一信道接入结果为失败,则该一组信道均无法用于在第一时隙发送S-SSB。
在一些实施例中,该方法还可以包括:在该一组信道中的至少一个第四信道上执行类型2的信道接入;其中,COT不包含该至少一个第四信道;在该至少一个第四信道上执行类型2的信道接入得到的 信道接入结果,可用于确定该至少一个第四信道是否可用于在第一时隙发送S-SSB。
也就是说,对于未包含在COT内的至少一个第四信道,第一终端可在该至少一个第四信道上执行类型2的信道接入。例如,在第一时刻之前,第一终端已计划在该至少一个第四信道上执行类型2的信道接入,那么,等到预先计划的开始执行该类型2的信道接入的时刻,第一终端即可按照预先的计划在该至少一个第四信道上执行类型2的信道接入。
示例性地,在该至少一个第四信道上执行类型2的信道接入得到的信道接入结果,可用于确定该至少一个第四信道是否可用于在第一时隙发送S-SSB。例如,对于该至少一个第四信道中的某个第四信道,若第一终端在该第四信道上执行类型2的信道接入的结果为成功,则第一终端可在该第四信道上发送S-SSB,发送S-SSB的时隙为第一时隙;若第一终端在该第四信道上执行类型2的信道接入的结果为失败,则第一终端无法在第一时隙在该第四信道上发送S-SSB。
根据上述技术方案,若第一终端在某个第四信道上执行类型2的信道接入的结果为成功,则第一终端可在该第四信道上发送S-SSB,也就是说,各个第四信道是否可用于在第一时隙发送S-SSB,可以不需要依赖于第一信道接入结果是否为成功,或者说,各个第四信道的信道接入可独立进行,从而提高了第一终端成功接入该至少一个第四信道并在该至少一个第四信道上发送S-SSB的概率,进而提升了S-SSB的发送/检测效果。
在一些实施例中,该方法还可以包括:第一终端接收来自第二终端的第一信息,第一信息用于向第一终端共享COT,第一信息包括该COT的时频信息,且该COT由第二终端发起。
也就是说,第二终端可通过向第一终端发送第一信息,将该第二终端发起的COT共享给第一终端,并可在该第一信息中携带COT的时频信息。相应地,第一终端通过接收该第一信息,可获取COT的时频信息。基于该COT的时频信息,第一终端可获知该COT内包含哪些信道和时隙。例如在本实施例中,第一终端可基于该COT的时频信息,获知至少一个第一信道和第一时隙包含在该COT内,从而,第一终端可在该至少一个第一信道上执行类型2的信道接入,以提高第一终端成功接入该至少一个第一信道并在该至少一个第一信道上发送S-SSB的概率,进而避免COT资源的丢失。
在一些实施例中,上述第一时刻(第一终端获取COT的时频信息的时刻),还可以理解为,第一终端接收到来自第二终端的第一信息的时刻。
上文介绍了本申请实施例提供的信道接入方法,为便于理解本申请的实施例,下面结合示例,介绍适用于本申请实施例的信道接入方法的可能的实现方案。
方案一
假设UE(第一终端的一例)计划的用于在时隙n(对应前述实施例中的第一时隙)发送S-SSB的一组信道(或RB集合)包括C个信道,信道Ci为该C个信道中的任意一个信道。对于信道Ci,UE可使用信道接入方式Type1、Type2(2A、2B或2C)中的任意一种方式进行信道接入(信道侦听)。若UE在信道Ci上成功接入,则可在信道Ci上发送S-SSB。
在方案一中,在UE在信道Ci上采用Type1信道接入的情况下,当UE获取到COT信息(COT的时频信息)时,若COT包含信道Ci上即将发送S-SSB的时隙n,则UE可在时隙n之前,在信道Ci上转换为采用Type2(2A、2B或2C)的信道接入方式。
其中,上述采用Type1信道接入,例如可包括以下两种情况:
情况#1:计划采用Type1信道接入,但尚未实施信道侦听;
情况#2:已经开始实施Type1信道接入的信道侦听过程。
对于上述情况#1,也即,UE计划在信道Ci上采用Type1信道接入,但尚未实施信道侦听。在该情况下,等到原定的(计划的)开始执行Type1信道接入的时刻,UE不再执行Type1信道接入,而是等到时隙n之前进行Type2信道接入。
对于上述情况#2,也即,UE已经开始在信道Ci上实施Type1信道接入的信道侦听过程。在该情况下,UE可切换至Type2(2A、2B或2C)的信道接入方式。
例如,UE在信道Ci上实施Type1信道接入的过程中,若在t1时刻(对应前述实施例中的第一时刻)获取到COT信息,那么,UE可在t1时刻停止Type1信道接入/信道侦听,等到时隙n之前的t2时刻,便开始进行Type2(2A、2B或2C)的信道接入/信道侦听。对于已经获取的Type1的信道侦听结果(部分/全部信道侦听结果),UE可忽略。
在一些场景中,对于上述情况#2,若t1时刻(UE获取到COT信息的时刻)与时隙n之间的时间间隔(剩余时间长度)不足以进行Type2(2A、2B或2C)信道接入过程,则UE可继续进行并完成当前正在实施的Type1信道接入过程,并使用Type1的信道侦听结果(若成功)接入信道。
为便于理解,图20示出了方案一的一个示例。在图20中,假设UE计划采用的多信道接入方式为TypeA的多信道接入。图20所示的流程可包括以下步骤S201至S204:
S201,UE计划/决定将在时隙n(S-SSB时隙n)发送S-SSB的频域资源包括RB集合#0、RB集合#1、RB集合#2和RB集合#3,并可确定每个RB集合上分别发送几个重复的S-SSB,以及在一个RB集合内相邻S-SSB之间的间隔等。其中,RB集合#0为锚点RB集合,RB集合#1、RB集合#2和RB集合#3为非锚点RB集合。
S202,UE执行Type1信道接入/LBT。
在该步骤中,UE可采用TypeA的多信道接入方式执行信道接入。也即,UE可在RB集合#0、RB集合#1、RB集合#2和RB集合#3上分别独立采用Type1信道接入方式进行信道接入/LBT。
S203,UE在COT包含的RB集合上改为采用Type2的信道接入方式进行信道侦听。
例如,UE在t1时刻获取到COT信息,基于该COT信息,UE可获知RB集合#2和RB集合#3包含在COT内。进一步地,UE可在RB集合#2和RB集合#3上改为采用Type2的信道接入方式进行信道侦听。例如,UE可在t1时刻停止Type1信道接入,等到时隙n之前的t2时刻,便开始进行Type2的信道接入。
S204,UE在时隙n发送S-SSB。
对于RB集合#0至RB集合#3中的任一RB集合,若UE在该RB集合信道接入成功,则可在该RB集合上发送S-SSB,发送S-SSB的时隙为时隙n。例如,若UE在RB集合#0信道接入成功,则可在RB集合#0上发送S-SSB;又例如,若UE在RB集合#2信道接入成功,则可在RB集合#2上发送S-SSB。
应理解,图20所示方案中的“RB集合”还可以替换为“信道”。
图21示出了方案一的另一个示例。在图21中,假设UE计划采用的多信道接入方式为TypeA的多信道接入。图21所示的流程可包括以下步骤S211至S214:
S211,UE计划/决定将在时隙n(S-SSB时隙n)发送S-SSB的频域资源包括RB集合#0、RB集合#1、RB集合#2和RB集合#3,并可确定每个RB集合上分别发送几个重复的S-SSB,以及在一个RB集合内相邻S-SSB之间的间隔等。其中,RB集合#0为锚点RB集合,RB集合#1、RB集合#2和RB集合#3为非锚点RB集合。
S212,UE在部分或全部RB集合上执行Type1信道接入/LBT。
一种可能的情况(记为情况#11),UE获取COT信息的时刻为t11时刻。也就是说,UE在t11时刻,可基于该COT信息获知RB集合#2和RB集合#3包含在COT内。如图21所示,t11时刻在计划的开始执行Type1信道接入的时刻之前,也即,在t11时刻,UE尚未开始按计划执行Type1信道接入,在该情况下,等到计划的开始执行Type1信道接入的时刻,UE在RB集合#2和RB集合#3上不再执行Type1信道接入。UE在RB集合#0和RB集合#1上,仍可按照计划执行Type1信道接入。
另一种可能的情况(记为情况#12),UE获取COT信息的时刻为t12时刻或t13时刻。也就是说,UE在t12时刻或t13时刻,可基于该COT信息获知RB集合#2和RB集合#3包含在COT内。如图21所示,t12时刻和t13时刻在UE计划的开始执行Type1信道接入的时刻之后,也就是说,在UE计划的开始执行Type1信道接入的时刻,UE尚未获知COT的时频信息,在该情况下,UE在RB集合#0至RB集合#3上,可按照计划执行Type1信道接入。
S213,UE在RB集合#2和RB集合#3上执行Type2信道接入/LBT。
对于上述情况#11,UE可等到时隙n之前的t2时刻,开始在RB集合#2和RB集合#3上执行Type2信道接入。
对于上述情况#12,假设UE获取到COT信息的时刻为t12时刻。如图21所示,在t12时刻,UE已经开始执行Type1信道接入/信道侦听,那么,在t12时刻,UE可停止在RB集合#2和RB集合#3上的Type1信道接入/信道侦听,并可放弃已经获取到的Type1的部分/全部信道侦听结果。等到时隙n之前的t2时刻,UE可开始在RB集合#2和RB集合#3上执行Type2信道接入。
对于上述情况#12,假设UE获取到COT信息的时刻为t13时刻。如图21所示,t13时刻与时隙n之间的时间间隔不足以进行Type2信道接入过程,也就是说,此时无论UE是否继续执行Type1信道侦听,在时隙n之前都没有足够的时间进行Type2信道接入过程,故在该情况下,UE可按照已经进行的Type1信道接入方式执行。
S214,UE在时隙n发送S-SSB。
对于RB集合#0至RB集合#3中的任一RB集合,若UE在该RB集合信道接入成功,则可在该RB集合上发送S-SSB,发送S-SSB的时隙为时隙n。例如,若UE在RB集合#0信道接入成功,则可在RB集合#0上发送S-SSB;又例如,若UE在RB集合#2信道接入成功,则可在RB集合#2上发送S-SSB。
应理解,图21所示方案中的“RB集合”还可以替换为“信道”。
方案二
假设UE计划的用于在时隙n(对应前述实施例中的第一时隙)发送S-SSB的一组信道(或RB集合)包括C个信道。
在方案二中,UE可从非锚点信道中任意选择一个信道Ci采用Type1的信道接入方式(也即,从非锚点RB集合中任意选择一个RB集合采用Type1的信道接入方式)。其他信道(RB集合)采用Type2的信道接入方式。
在UE在信道Ci上采用Type1信道接入的情况下,当UE获取到COT信息(COT的时频信息)时,若COT包含信道Ci上即将发送S-SSB的时隙n,则UE可在时隙n之前,在信道Ci上转换为采用Type2(2A、2B或2C)的信道接入方式。
其中,上述采用Type1信道接入,例如可包括以下两种情况:
情况#3:计划采用Type1信道接入,但尚未实施信道侦听;
情况#4:已经开始实施Type1信道接入的信道侦听过程。
对于上述情况#3,也即,UE计划在信道Ci上采用Type1信道接入,但尚未实施信道侦听。在该情况下,等到原定的(计划的)开始执行Type1信道接入的时刻,UE不再执行Type1信道接入,而是等到时隙n之前进行Type2信道接入。
对于上述情况#4,也即,UE已经开始在信道Ci上实施Type1信道接入的信道侦听过程。在该情况下,UE可切换至Type2(2A、2B或2C)的信道接入方式。
例如,UE在信道Ci上实施Type1信道接入的过程中,若在t1时刻(对应前述实施例中的第一时刻)获取到COT信息,那么,UE可在t1时刻停止Type1信道接入/信道侦听,等到时隙n之前的t2时刻,便开始进行Type2(2A、2B或2C)的信道接入/信道侦听。对于已经获取的Type1的信道侦听结果(部分/全部信道侦听结果),UE可忽略。
在一些场景中,对于上述情况#4,若t1时刻(UE获取到COT信息的时刻)与时隙n之间的时间间隔(剩余时间长度)不足以进行Type2(2A、2B或2C)信道接入过程,则UE可继续进行并完成当前正在实施的Type1信道接入过程,并使用Type1的信道侦听结果(若成功)接入信道。
在一些实施例中,对于上述情况#3和/或情况#4,若UE在某个信道上信道接入成功,则可在该信道上发送S-SSB,发送S-SSB的时隙为时隙n。也就是说,各个信道的信道接入可独立进行,无需依赖于信道Ci是否信道接入成功。
在一些实施例中,对于上述情况#3和/或情况#4,其他信道只有在信道Ci执行信道接入成功的情况下,才能根据各自的信道接入结果确定能否接入信道并发送S-SSB。也就是说,其他信道能否用于在时隙n发送S-SSB,需依赖于信道Ci是否信道接入成功,若在信道Ci上执行信道接入失败,则C个信道均无法用于S-SSB的发送。
为便于理解,图22示出了方案二的一个示例。在图22中,假设UE计划采用的多信道接入方式为TypeB的多信道接入。图22所示的流程可包括以下步骤S221至S224:
S221,UE计划/决定将在时隙n(S-SSB时隙n)发送S-SSB的频域资源包括RB集合#0、RB集合#1、RB集合#2和RB集合#3,并可确定每个RB集合上分别发送几个重复的S-SSB,以及在一个RB集合内相邻S-SSB之间的间隔等。其中,RB集合#0为锚点RB集合,RB集合#1、RB集合#2和RB集合#3为非锚点RB集合。
S222,UE在RB集合#2上执行Type1信道接入/LBT。
在本实施例中,UE例如可计划在RB集合#2上采用Type1的信道接入方式,在其他RB集合上采用Type2的信道接入方式。
一种可能的情况(记为情况#21),UE获取COT信息的时刻为t11时刻。也就是说,UE在t11时刻,可基于该COT信息获知RB集合#2和RB集合#3包含在COT内。如图22所示,t11时刻在计划的开始执行Type1信道接入的时刻之前,也即,在t11时刻,UE尚未开始按计划在RB集合#2上执行Type1信道接入,在该情况下,等到计划的开始执行Type1信道接入的时刻,UE在RB集合#2上不再执行Type1信道接入。
另一种可能的情况(记为情况#22),UE获取COT信息的时刻为t12时刻或t13时刻。也就是说,UE在t12时刻或t13时刻,可基于该COT信息获知RB集合#2和RB集合#3包含在COT内。如图22所示,t12时刻和t13时刻在UE计划的开始执行Type1信道接入的时刻之后,也就是说,在UE计划的开始执行Type1信道接入的时刻,UE尚未获知COT的时频信息,在该情况下,UE在RB集合#2上,可按照计划执行Type1信道接入。
S223,UE执行Type2信道接入/LBT。
对于上述情况#21,UE可等到时隙n之前的t2时刻,开始在RB集合#0至RB集合#3上执行Type2 信道接入。
对于上述情况#22,假设UE获取到COT信息的时刻为t12时刻。如图22所示,在t12时刻,UE已经开始在RB集合#2上执行Type1信道接入/信道侦听,那么,在t12时刻,UE可停止在RB集合#2上的Type1信道接入/信道侦听,并可放弃已经获取到的Type1的部分/全部信道侦听结果。等到时隙n之前的t2时刻,UE可开始在RB集合#0至RB集合#3上执行Type2信道接入。
对于上述情况#22,假设UE获取到COT信息的时刻为t13时刻。如图22所示,t13时刻与时隙n之间的时间间隔不足以进行Type2信道接入过程,故在该情况下,UE在RB集合#2上可继续完成Type1信道接入。UE在RB集合#0、RB集合#1和RB集合#3上,可按照计划在t2时刻开始执行Type2信道接入。
S224,UE在时隙n发送S-SSB。
在一些实施例中,对于上述情况#21和/或情况#22,若UE在某个RB集合上信道接入成功,则可在该信道上发送S-SSB,发送S-SSB的时隙为时隙n。也就是说,各个RB集合的信道接入可独立进行,无需依赖于RB集合#2是否信道接入成功。
在一些实施例中,对于上述情况#21和/或情况#22,其他RB集合只有在RB集合#2信道接入成功的情况下,才能根据各自的信道接入结果确定能否接入信道并发送S-SSB。也就是说,其他RB集合能否用于在时隙n发送S-SSB,需依赖于RB集合#2是否信道接入成功,若RB集合#2信道接入失败,则RB集合#0至RB集合3均无法用于S-SSB的发送。
应理解,图22所示方案中的“RB集合”还可以替换为“信道”。
根据本申请实施例提供的信道接入方法,当UE采用多信道接入机制时,在已有信道接入类型计划的情况下,若UE获取到COT时频信息,则可根据获取COT时频信息的时刻以及距离发送S-SSB的剩余时间,来决定是否切换为新的信道接入类型(例如,从Type1信道接入切换为Type2信道接入)。如果原计划多信道接入的信道之间存在关联性,那么在切换为新的信道接入类型之后,关联性可自动消失,或者,关联性依然存在。该方法通过切换信道接入类型,提升了信道接入的概率,同时维持了已有的COT资源,以避免异系统用户的抢占,进而保证了侧行链路在非授权频段的资源的可靠性。
以上结合附图详细描述了本申请的优选实施方式,但是,本申请并不限于上述实施方式中的具体细节,在本申请的技术构思范围内,可以对本申请的技术方案进行多种简单变型,这些简单变型均属于本申请的保护范围。例如,在上述具体实施方式中所描述的各个具体技术特征,在不矛盾的情况下,可以通过任何合适的方式进行组合,为了避免不必要的重复,本申请对各种可能的组合方式不再另行说明。又例如,本申请的各种不同的实施方式之间也可以进行任意组合,只要其不违背本申请的思想,其同样应当视为本申请所公开的内容。又例如,在不冲突的前提下,本申请描述的各个实施例和/或各个实施例中的技术特征可以和现有技术任意的相互组合,组合之后得到的技术方案也应落入本申请的保护范围。
还应理解,在本申请的各种方法实施例中,上述各过程的序号的大小并不意味着执行顺序的先后,各过程的执行顺序应以其功能和内在逻辑确定,而不应对本申请实施例的实施过程构成任何限定。此外,在本申请实施例中,术语“下行”、“上行”和“侧行”用于表示信号或数据的传输方向,其中,“下行”用于表示信号或数据的传输方向为从站点发送至小区的用户设备的第一方向,“上行”用于表示信号或数据的传输方向为从小区的用户设备发送至站点的第二方向,“侧行”用于表示信号或数据的传输方向为从用户设备1发送至用户设备2的第三方向。例如,“下行信号”表示该信号的传输方向为第一方向。另外,本申请实施例中,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。具体地,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。
基于前述的实施例,本申请实施例提供相应的信道接入装置。
图23是本申请实施例提供的信道接入装置的结构组成示意图,应用于第一终端。如图23所示,信道接入装置2300(下文中简称为装置2300)包括:
处理单元2301,被配置为在一组信道中的至少一个第一信道上执行类型2的信道接入,在至少一个第一信道上执行类型2的信道接入得到的信道接入结果,用于确定至少一个第一信道是否可用于在第一时隙发送侧行链路同步信号块S-SSB;其中,一组信道为计划用于在第一时隙发送S-SSB的信道,至少一个第一信道和第一时隙包含在信道占用时间COT内。
在一些实施例中,处理单元2301,还被配置为:若在第一时刻,已开始在至少一个第一信道中的全部或部分第一信道上执行类型1的信道接入,则在第一时刻,停止执行类型1的信道接入;第一时刻为获取COT的时频信息的时刻。
在一些实施例中,处理单元2301,还被配置为:若在第一时刻,未开始在至少一个第一信道中的全部或部分第一信道上执行类型1的信道接入,则不执行类型1的信道接入;第一时刻为获取COT的 时频信息的时刻。
在一些实施例中,在第一时刻之前,对于全部或部分第一信道,计划采用的信道接入方式为类型1的信道接入。
在一些实施例中,全部或部分第一信道为一组信道中的非锚点信道。
在一些实施例中,处理单元2301,还被配置为在一组信道中的至少一个第二信道上执行类型1的信道接入;其中,COT不包含至少一个第二信道;在至少一个第二信道上执行类型1的信道接入得到的信道接入结果,用于确定至少一个第二信道是否可用于在第一时隙发送S-SSB。
在一些实施例中,至少一个第二信道为一组信道中的非锚点信道。
在一些实施例中,处理单元2301,还被配置为在一组信道中的至少一个第三信道上执行类型2的信道接入;其中,COT不包含至少一个第二信道;在至少一个第三信道上执行类型2的信道接入得到的信道接入结果,用于确定至少一个第三信道是否可用于在第一时隙发送S-SSB。
在一些实施例中,处理单元2301,还被配置为:若在第一时刻,已开始在目标第一信道上执行类型1的信道接入,则在第一时刻,停止执行类型1的信道接入;其中,目标第一信道是至少一个第一信道中的其中一个第一信道,第一时刻为获取COT的时频信息的时刻。
在一些实施例中,处理单元2301,还被配置为:若在第一时刻,未开始在目标第一信道上执行类型1的信道接入,则不执行类型1的信道接入;其中,目标第一信道是至少一个第一信道中的其中一个第一信道,第一时刻为获取COT的时频信息的时刻。
在一些实施例中,在第一时刻之前,对于目标第一信道,计划采用的信道接入方式为类型1的信接入。
在一些实施例中,目标第一信道为一组信道中的其中一个非锚点信道。
在一些实施例中,在至少一个第一信道上执行类型2的信道接入得到的信道接入结果,包括:在目标第一信道上执行类型2的信道接入得到的第一信道接入结果;在第一信道接入结果为成功的情况下,在至少一个第一信道上执行类型2的信道接入得到的信道接入结果,用于确定至少一个第一信道是否可用于在第一时隙发送S-SSB。
在一些实施例中,处理单元2301,还被配置为在一组信道中的至少一个第四信道上执行类型2的信道接入;其中,COT不包含至少一个第四信道;在第一信道接入结果为成功的情况下,在至少一个第四信道上执行类型2的信道接入得到的信道接入结果,用于确定至少一个第四信道是否可用于在第一时隙发送S-SSB。
在一些实施例中,在第一信道接入结果为失败的情况下,一组信道不用于在第一时隙发送S-SSB。
在一些实施例中,处理单元2301,还被配置为在一组信道中的至少一个第四信道上执行类型2的信道接入;其中,COT不包含至少一个第四信道;在至少一个第四信道上执行类型2的信道接入得到的信道接入结果,用于确定至少一个第四信道是否可用于在第一时隙发送S-SSB。
在一些实施例中,第一时刻与第一时隙之间的时间间隔,大于或等于执行类型2的信道接入所需的时长。
在一些实施例中,处理单元2301,还被配置为确定第一时刻与第一时隙之间的时间间隔,是否大于或等于执行类型2的信道接入所需的时长。
在一些实施例中,装置2300还包括:通信单元,被配置为接收来自第二终端的第一信息,第一信息用于向装置2300共享COT,第一信息包括COT的时频信息,COT由第二终端发起。
本领域技术人员应当理解,本申请实施例的上述信道接入装置的相关描述可以参照本申请实施例的信道接入方法的相关描述进行理解。
图24是本申请实施例提供的一种通信设备2400示意性结构图。图24所示的通信设备2400包括处理器2410,处理器2410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24所示,通信设备2400还可以包括存储器2420。其中,处理器2410可以从存储器2420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2420可以是独立于处理器2410的一个单独的器件,也可以集成在处理器2410中。
可选地,如图24所示,通信设备2400还可以包括收发器2430,处理器2410可以控制该收发器2430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2430可以包括发射机和接收机。收发器2430还可以进一步包括天线,天线的数量可以为一个或多个。
该通信设备2400具体可为本申请实施例的终端(如第一终端),并且该通信设备2400可以实现本申请实施例的各个方法中由终端(如第一终端)实现的相应流程,为了简洁,在此不再赘述。
图25是本申请实施例的芯片的示意性结构图。图25所示的芯片2500包括处理器2510,处理器2510 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25所示,芯片2500还可以包括存储器2520。其中,处理器2510可以从存储器2520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2520可以是独立于处理器2510的一个单独的器件,也可以集成在处理器2510中。
可选地,该芯片2500还可以包括输入接口2530。其中,处理器2510可以控制该输入接口2530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2500还可以包括输出接口2540。其中,处理器2510可以控制该输出接口2540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。
该芯片可应用于本申请实施例中的终端(如第一终端),并且该芯片可以实现本申请实施例的各个方法中由终端(如第一终端)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。
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。该计算机可读存储介质可应用于本申请实施例中的终端(如第一终端),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终端(如第一终端)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。该计算机程序产品可应用于本申请实施例中的终端(如第一终端),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终端(如第一终端)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。该计算机程序可应用于本申请实施例中的终端(如第一终端),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终端(如第一终端)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以所述权利要求的保护范围为准。

Claims (43)

  1. 一种信道接入方法,应用于第一终端,所述方法包括:
    在一组信道中的至少一个第一信道上执行类型2的信道接入,在所述至少一个第一信道上执行类型2的信道接入得到的信道接入结果,用于确定所述至少一个第一信道是否可用于在第一时隙发送侧行链路同步信号块S-SSB;
    其中,所述一组信道为计划用于在所述第一时隙发送S-SSB的信道,所述至少一个第一信道和所述第一时隙包含在信道占用时间COT内。
  2. 根据权利要求1所述的方法,其中,所述方法还包括:
    若在第一时刻,已开始在所述至少一个第一信道中的全部或部分第一信道上执行类型1的信道接入,则在所述第一时刻,停止执行所述类型1的信道接入;所述第一时刻为获取所述COT的时频信息的时刻。
  3. 根据权利要求1所述的方法,其中,所述方法还包括:
    若在第一时刻,未开始在所述至少一个第一信道中的全部或部分第一信道上执行类型1的信道接入,则不执行所述类型1的信道接入;所述第一时刻为获取所述COT的时频信息的时刻。
  4. 根据权利要求2或3所述的方法,其中,
    在所述第一时刻之前,对于所述全部或部分第一信道,计划采用的信道接入方式为类型1的信道接入。
  5. 根据权利要求2至4中任一项所述的方法,其中,
    所述全部或部分第一信道为所述一组信道中的非锚点信道。
  6. 根据权利要求1至5中任一项所述的方法,其中,所述方法还包括:
    在所述一组信道中的至少一个第二信道上执行类型1的信道接入;
    其中,所述COT不包含所述至少一个第二信道;
    在所述至少一个第二信道上执行类型1的信道接入得到的信道接入结果,用于确定所述至少一个第二信道是否可用于在所述第一时隙发送S-SSB。
  7. 根据权利要求6所述的方法,其中,
    所述至少一个第二信道为所述一组信道中的非锚点信道。
  8. 根据权利要求1至7中任一项所述的方法,其中,所述方法还包括:
    在所述一组信道中的至少一个第三信道上执行类型2的信道接入;
    其中,所述COT不包含所述至少一个第二信道;
    在所述至少一个第三信道上执行类型2的信道接入得到的信道接入结果,用于确定所述至少一个第三信道是否可用于在所述第一时隙发送S-SSB。
  9. 根据权利要求1所述的方法,其中,所述方法还包括:
    若在第一时刻,已开始在目标第一信道上执行类型1的信道接入,则在所述第一时刻,停止执行所述类型1的信道接入;
    其中,所述目标第一信道是所述至少一个第一信道中的其中一个第一信道,所述第一时刻为获取所述COT的时频信息的时刻。
  10. 根据权利要求1所述的方法,其中,所述方法还包括:
    若在第一时刻,未开始在目标第一信道上执行类型1的信道接入,则不执行所述类型1的信道接入;
    其中,所述目标第一信道是所述至少一个第一信道中的其中一个第一信道,所述第一时刻为获取所述COT的时频信息的时刻。
  11. 根据权利要求9或10所述的方法,其中,
    在所述第一时刻之前,对于所述目标第一信道,计划采用的信道接入方式为类型1的信接入。
  12. 根据权利要求9至11中任一项所述的方法,其中,
    所述目标第一信道为所述一组信道中的其中一个非锚点信道。
  13. 根据权利要求9至12中任一项所述的方法,其中,
    在所述至少一个第一信道上执行类型2的信道接入得到的信道接入结果,包括:在所述目标第一信道上执行类型2的信道接入得到的第一信道接入结果;
    在所述第一信道接入结果为成功的情况下,在所述至少一个第一信道上执行类型2的信道接入得到的信道接入结果,用于确定所述至少一个第一信道是否可用于在所述第一时隙发送S-SSB。
  14. 根据权利要求13所述的方法,其中,所述方法还包括:
    在所述一组信道中的至少一个第四信道上执行类型2的信道接入;
    其中,所述COT不包含所述至少一个第四信道;
    在所述第一信道接入结果为成功的情况下,在所述至少一个第四信道上执行类型2的信道接入得到的信道接入结果,用于确定所述至少一个第四信道是否可用于在所述第一时隙发送S-SSB。
  15. 根据权利要求13或14所述的方法,其中,
    在所述第一信道接入结果为失败的情况下,所述一组信道不用于在所述第一时隙发送S-SSB。
  16. 根据权利要求9至12中任一项所述的方法,其中,所述方法还包括:
    在所述一组信道中的至少一个第四信道上执行类型2的信道接入;
    其中,所述COT不包含所述至少一个第四信道;
    在所述至少一个第四信道上执行类型2的信道接入得到的信道接入结果,用于确定所述至少一个第四信道是否可用于在所述第一时隙发送S-SSB。
  17. 根据权利要求2至5、9至16中任一项所述的方法,其中,
    所述第一时刻与所述第一时隙之间的时间间隔,大于或等于执行类型2的信道接入所需的时长。
  18. 根据权利要求2至5、9至17中任一项所述的方法,其中,所述方法还包括:
    确定所述第一时刻与所述第一时隙之间的时间间隔,是否大于或等于执行类型2的信道接入所需的时长。
  19. 根据权利要求1至18中任一项所述的方法,其中,所述方法还包括:
    接收来自第二终端的第一信息,所述第一信息用于向所述第一终端共享所述COT,所述第一信息包括所述COT的时频信息,所述COT由所述第二终端发起。
  20. 一种信道接入装置,所述装置包括:
    处理单元,被配置为在一组信道中的至少一个第一信道上执行类型2的信道接入,在所述至少一个第一信道上执行类型2的信道接入得到的信道接入结果,用于确定所述至少一个第一信道是否可用于在第一时隙发送侧行链路同步信号块S-SSB;
    其中,所述一组信道为计划用于在所述第一时隙发送S-SSB的信道,所述至少一个第一信道和所述第一时隙包含在信道占用时间COT内。
  21. 根据权利要求20所述的装置,其中,
    所述处理单元,还被配置为:若在第一时刻,已开始在所述至少一个第一信道中的全部或部分第一信道上执行类型1的信道接入,则在所述第一时刻,停止执行所述类型1的信道接入;所述第一时刻为获取所述COT的时频信息的时刻。
  22. 根据权利要求20所述的装置,其中,
    所述处理单元,还被配置为:若在第一时刻,未开始在所述至少一个第一信道中的全部或部分第一信道上执行类型1的信道接入,则不执行所述类型1的信道接入;所述第一时刻为获取所述COT的时频信息的时刻。
  23. 根据权利要求21或22所述的装置,其中,
    在所述第一时刻之前,对于所述全部或部分第一信道,计划采用的信道接入方式为类型1的信道接入。
  24. 根据权利要求21至23中任一项所述的装置,其中,
    所述全部或部分第一信道为所述一组信道中的非锚点信道。
  25. 根据权利要求20至24中任一项所述的装置,其中,
    所述处理单元,还被配置为在所述一组信道中的至少一个第二信道上执行类型1的信道接入;
    其中,所述COT不包含所述至少一个第二信道;
    在所述至少一个第二信道上执行类型1的信道接入得到的信道接入结果,用于确定所述至少一个第二信道是否可用于在所述第一时隙发送S-SSB。
  26. 根据权利要求25所述的装置,其中,
    所述至少一个第二信道为所述一组信道中的非锚点信道。
  27. 根据权利要求20至26中任一项所述的装置,其中,
    所述处理单元,还被配置为在所述一组信道中的至少一个第三信道上执行类型2的信道接入;
    其中,所述COT不包含所述至少一个第二信道;
    在所述至少一个第三信道上执行类型2的信道接入得到的信道接入结果,用于确定所述至少一个第三信道是否可用于在所述第一时隙发送S-SSB。
  28. 根据权利要求20所述的装置,其中,
    所述处理单元,还被配置为:若在第一时刻,已开始在目标第一信道上执行类型1的信道接入,则 在所述第一时刻,停止执行所述类型1的信道接入;
    其中,所述目标第一信道是所述至少一个第一信道中的其中一个第一信道,所述第一时刻为获取所述COT的时频信息的时刻。
  29. 根据权利要求20所述的装置,其中,
    所述处理单元,还被配置为:若在第一时刻,未开始在目标第一信道上执行类型1的信道接入,则不执行所述类型1的信道接入;
    其中,所述目标第一信道是所述至少一个第一信道中的其中一个第一信道,所述第一时刻为获取所述COT的时频信息的时刻。
  30. 根据权利要求28或29所述的装置,其中,
    在所述第一时刻之前,对于所述目标第一信道,计划采用的信道接入方式为类型1的信接入。
  31. 根据权利要求28至30中任一项所述的装置,其中,
    所述目标第一信道为所述一组信道中的其中一个非锚点信道。
  32. 根据权利要求28至31中任一项所述的装置,其中,
    在所述至少一个第一信道上执行类型2的信道接入得到的信道接入结果,包括:在所述目标第一信道上执行类型2的信道接入得到的第一信道接入结果;
    在所述第一信道接入结果为成功的情况下,在所述至少一个第一信道上执行类型2的信道接入得到的信道接入结果,用于确定所述至少一个第一信道是否可用于在所述第一时隙发送S-SSB。
  33. 根据权利要求32所述的装置,其中,
    所述处理单元,还被配置为在所述一组信道中的至少一个第四信道上执行类型2的信道接入;
    其中,所述COT不包含所述至少一个第四信道;
    在所述第一信道接入结果为成功的情况下,在所述至少一个第四信道上执行类型2的信道接入得到的信道接入结果,用于确定所述至少一个第四信道是否可用于在所述第一时隙发送S-SSB。
  34. 根据权利要求32或33所述的装置,其中,
    在所述第一信道接入结果为失败的情况下,所述一组信道不用于在所述第一时隙发送S-SSB。
  35. 根据权利要求28至31中任一项所述的装置,其中,
    所述处理单元,还被配置为在所述一组信道中的至少一个第四信道上执行类型2的信道接入;
    其中,所述COT不包含所述至少一个第四信道;
    在所述至少一个第四信道上执行类型2的信道接入得到的信道接入结果,用于确定所述至少一个第四信道是否可用于在所述第一时隙发送S-SSB。
  36. 根据权利要求21至24、28至35中任一项所述的装置,其中,
    所述第一时刻与所述第一时隙之间的时间间隔,大于或等于执行类型2的信道接入所需的时长。
  37. 根据权利要求21至24、28至36中任一项所述的装置,其中,
    所述处理单元,还被配置为确定所述第一时刻与所述第一时隙之间的时间间隔,是否大于或等于执行类型2的信道接入所需的时长。
  38. 根据权利要求20至37中任一项所述的装置,其中,所述装置还包括:
    通信单元,被配置为接收来自第二终端的第一信息,所述第一信息用于向所述第一终端共享所述COT,所述第一信息包括所述COT的时频信息,所述COT由所述第二终端发起。
  39. 一种终端,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19中任一项所述的方法。
  40. 一种芯片,包括:处理器,用于从存储器中调用并运行计算机程序,使得安装有所述芯片的设备执行如权利要求1至19中任一项所述的方法。
  41. 一种计算机可读存储介质,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19中任一项所述的方法。
  42. 一种计算机程序产品,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19中任一项所述的方法。
  43. 一种计算机程序,所述计算机程序使得计算机执行如权利要求1至19中任一项所述的方法。
PCT/CN2023/141193 2023-12-22 2023-12-22 一种信道接入方法、装置、终端、芯片和存储介质 Pending WO2025129673A1 (zh)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021237607A1 (zh) * 2020-05-28 2021-12-02 Oppo广东移动通信有限公司 一种同步信号块ssb的传输方法及终端设备
CN115866758A (zh) * 2022-06-30 2023-03-28 中兴通讯股份有限公司 一种信息发送方法,通信节点及存储介质
CN116600410A (zh) * 2023-02-10 2023-08-15 侯威 一种用户设备间共享信道占用的方法和设备
WO2023159484A1 (zh) * 2022-02-25 2023-08-31 Oppo广东移动通信有限公司 信道侦听方法和通信设备
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WO2021237607A1 (zh) * 2020-05-28 2021-12-02 Oppo广东移动通信有限公司 一种同步信号块ssb的传输方法及终端设备
WO2023159484A1 (zh) * 2022-02-25 2023-08-31 Oppo广东移动通信有限公司 信道侦听方法和通信设备
CN116963023A (zh) * 2022-04-12 2023-10-27 维沃移动通信有限公司 信道传输方法及装置、终端
CN115866758A (zh) * 2022-06-30 2023-03-28 中兴通讯股份有限公司 一种信息发送方法,通信节点及存储介质
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