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WO2021062580A1 - 确定侧行链路传输资源的方法和装置 - Google Patents

确定侧行链路传输资源的方法和装置 Download PDF

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Publication number
WO2021062580A1
WO2021062580A1 PCT/CN2019/109284 CN2019109284W WO2021062580A1 WO 2021062580 A1 WO2021062580 A1 WO 2021062580A1 CN 2019109284 W CN2019109284 W CN 2019109284W WO 2021062580 A1 WO2021062580 A1 WO 2021062580A1
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WO
WIPO (PCT)
Prior art keywords
resource
time domain
pscch
transmission resource
information
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2019/109284
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English (en)
French (fr)
Inventor
赵振山
卢前溪
林晖闵
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Guangdong Oppo Mobile Telecommunications Corp Ltd
Original Assignee
Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Family has litigation
First worldwide family litigation filed litigation Critical https://patents.darts-ip.com/?family=75337580&utm_source=google_patent&utm_medium=platform_link&utm_campaign=public_patent_search&patent=WO2021062580(A1) "Global patent litigation dataset” by Darts-ip is licensed under a Creative Commons Attribution 4.0 International License.
Priority to AU2019468770A priority Critical patent/AU2019468770B2/en
Priority to PCT/CN2019/109284 priority patent/WO2021062580A1/zh
Priority to ES19948108T priority patent/ES3002707T3/es
Application filed by Guangdong Oppo Mobile Telecommunications Corp Ltd filed Critical Guangdong Oppo Mobile Telecommunications Corp Ltd
Priority to CN202210084576.5A priority patent/CN114430538B/zh
Priority to FIEP19948108.6T priority patent/FI3975642T3/fi
Priority to CN201980096337.8A priority patent/CN113812194A/zh
Priority to IL289429A priority patent/IL289429B2/en
Priority to BR112021026719A priority patent/BR112021026719A2/pt
Priority to EP24203013.8A priority patent/EP4462904A3/en
Priority to KR1020217043148A priority patent/KR20220072806A/ko
Priority to JP2021578122A priority patent/JP7387771B2/ja
Priority to EP19948108.6A priority patent/EP3975642B1/en
Publication of WO2021062580A1 publication Critical patent/WO2021062580A1/zh
Priority to US17/563,728 priority patent/US12439378B2/en
Anticipated expiration legal-status Critical
Priority to JP2023193943A priority patent/JP7749639B2/ja
Priority to US19/224,638 priority patent/US20250294527A1/en
Ceased legal-status Critical Current

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/03—Shaping networks in transmitter or receiver, e.g. adaptive shaping networks
    • H04L25/03828—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties
    • H04L25/03866—Arrangements for spectral shaping; Arrangements for providing signals with specified spectral properties using scrambling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0044—Allocation of payload; Allocation of data channels, e.g. PDSCH or PUSCH
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30—Services specially adapted for particular environments, situations or purposes
    • H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/02—Selection of wireless resources by user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W92/00—Interfaces specially adapted for wireless communication networks
    • H04W92/16—Interfaces between hierarchically similar devices
    • H04W92/18—Interfaces between hierarchically similar devices between terminal devices

Definitions

  • This application relates to the field of communications, and in particular to a method and device for determining side link transmission resources.
  • the 5th generation (5G) communication system supports communication between vehicles and everything (V2X).
  • V2X communication is a sidelink transmission technology.
  • a terminal device does not need to be forwarded by a network device. Communicate directly with another terminal device, thus having higher spectrum efficiency and lower transmission delay.
  • the sender of the side link can use the transmission resource of the data channel to transmit the control channel.
  • the sender of the side link may use the transmission resource of the physical sidelink shared channel (PSSCH) to transmit the physical sidelink control channel (PSCCH).
  • PSSCH physical sidelink shared channel
  • the aforementioned PSCCH may be a second-order PSCCH, that is, the aforementioned PSCCH may include a first PSCCH and a second PSCCH.
  • the first PSCCH may carry information for the receiving end of the side link to perform listening, and the second PSCCH may carry information for demodulating the PSSCH.
  • the first PSCCH may also include information indicating the transmission resource of the second PSCCH, so as to reduce the complexity of detecting the second PSCCH at the receiving end of the side link.
  • the receiving end of the side link can receive the first PSCCH through blind detection, but there is no relevant conclusion on how to configure the transmission resources of the second PSCCH.
  • the embodiments of the present application provide a method and device for determining side link transmission resources, which can effectively configure the transmission resources of the second PSCCH.
  • a method for determining side link transmission resources including: determining a third transmission resource, where the third transmission resource is used to transmit PSSCH; and determining a second transmission resource within the third transmission resource
  • the second transmission resource includes a time domain resource that is the same as and/or adjacent to a time domain resource of a demodulation reference signal (DMRS) of the PSSCH, and the second transmission resource is used to transmit the second PSCCH, the third transmission resource further includes a first transmission resource used to transmit the first PSCCH.
  • DMRS demodulation reference signal
  • a device for determining side link transmission resources can implement the functions corresponding to the method in the first aspect.
  • the functions can be implemented by hardware or by hardware executing corresponding software.
  • the hardware or software includes one or more units or modules corresponding to the above-mentioned functions.
  • the device is a terminal device or a network device or a chip.
  • the device may include a processing unit and a transceiving unit.
  • the processing unit may be a processor, and the transceiving unit may be a transceiver;
  • the terminal device or the network device may also include a storage unit, and the storage unit may be a memory; the storage unit Used to store instructions, the processing unit executes the instructions stored in the storage unit, so that the terminal device or the network device executes the method described in the first aspect.
  • the processing unit may be a processor, and the transceiving unit may be an input/output interface, a pin or a circuit, etc.; the processing unit executes the instructions stored in the storage unit to enable the terminal device containing the chip Or a network device executes the method described in the first aspect, and the storage unit may be a storage unit (for example, register, cache, etc.) in the chip, or a storage unit (for example, read-only memory, random access memory, etc.) located outside the chip. Access memory, etc.).
  • a computer-readable storage medium stores a computer program.
  • the processor executes the method described in the first aspect.
  • a computer program product including computer program code, and when the computer program code is executed by a processor, the processor executes the method described in the first aspect.
  • a computer program which when running on a computer, causes the computer to execute the method described in the first aspect.
  • Figure 1 is a schematic diagram of a communication system suitable for the present application
  • FIG. 2 is a schematic diagram of a data channel and control channel mapping method provided by an embodiment of the present application
  • FIG. 3 is a schematic diagram of a method for determining side link transmission resources according to an embodiment of the present application
  • FIG. 4 is a schematic diagram of a side link transmission resource provided by an embodiment of the present application.
  • FIG. 5 is a schematic diagram of another side link transmission resource provided by an embodiment of the present application.
  • FIG. 6 is a schematic diagram of still another side link transmission resource provided by an embodiment of the present application.
  • FIG. 7 is a schematic diagram of still another side link transmission resource provided by an embodiment of the present application.
  • FIG. 8 is a schematic diagram of still another side link transmission resource provided by an embodiment of the present application.
  • FIG. 9 is a schematic diagram of still another side link transmission resource provided by an embodiment of the present application.
  • FIG. 10 is a schematic diagram of still another side link transmission resource provided by an embodiment of the present application.
  • FIG. 11 is a schematic diagram of still another side link transmission resource provided by an embodiment of the present application.
  • FIG. 12 is a schematic diagram of still another side link transmission resource provided by an embodiment of the present application.
  • FIG. 13 is a schematic diagram of still another side link transmission resource provided by an embodiment of the present application.
  • FIG. 14 is a schematic diagram of a device for determining side link transmission resources provided by an embodiment of the present application.
  • FIG. 15 is a schematic diagram of a device for determining side link transmission resources provided by an embodiment of the present application.
  • Fig. 1 shows a schematic diagram of a communication system 100 suitable for the present application.
  • the system 100 includes a network device 110, a terminal device 121, and a terminal device 122.
  • the terminal device 121 and the terminal device 122 may be vehicles with communication functions, or in-vehicle electronic systems, mobile phones, wearable electronic devices, or other communication devices that implement the V2X protocol.
  • the network device 110 may be an evolved base station (evolutional node B, eNB) in the LTE system, or a base station (gNB) in a 5G communication system.
  • eNB evolved base station
  • gNB base station
  • the above-mentioned network device is only an example, and the network device 110 may also be a relay station or a connection station. Entry points, in-vehicle devices, wearable devices, and other types of devices.
  • the terminal device 121 and the terminal device 122 may determine the side link transmission resource through the instruction of the network device 110.
  • the terminal device 121 and the terminal device 122 may also determine the side link transmission resource without using the instruction of the network device 110.
  • the above two examples are the two transmission modes of side-link communication, the centralized scheduling transmission mode (also referred to as mode 1) and the distributed transmission mode (also referred to as mode 2).
  • mode 1 the centralized scheduling transmission mode
  • mode 2 the distributed transmission mode
  • Centralized scheduling transmission mode In this mode, the terminal device sends V2X data according to the resources allocated by the network device. Since the resources of the terminal equipment are uniformly allocated by the network equipment, there will be no situation where adjacent terminal equipment allocates the same resources, and the centralized scheduling transmission mode has better transmission reliability. However, due to the need to exchange signaling between the terminal equipment and the network equipment, compared with the distributed transmission mode, the transmission delay of sending data in the centralized scheduling transmission mode is longer.
  • network equipment can configure a resource pool for terminal equipment through system information block (SIB) or radio resource control (RRC) signaling, and the terminal equipment sends
  • SIB system information block
  • RRC radio resource control
  • data can be sent by obtaining some resources from the resource pool autonomously through random selection, based on the listening reservation mechanism, or based on the partial listening reservation mechanism.
  • the terminal device autonomously obtains some resources from the resource pool configured by the pre-configuration information to send data.
  • the pre-configuration information may be the information that the terminal device is configured inside the terminal device when it leaves the factory, or it may be the information that is pre-configured by the network device and stored inside the terminal device. Since terminal devices can independently select resources, it may happen that different terminal devices select the same resource to send data. Therefore, compared to the centralized scheduling transmission mode, the reliability of using the distributed transmission mode to send data is lower.
  • the terminal device when a terminal device selects some transmission resources from the resource pool for data transmission, for periodic transmission services, the terminal device can reserve transmission resources for the next transmission to prevent other users from preempting the transmission resources; For aperiodic transmission services, terminal equipment does not reserve transmission resources.
  • the communication system 100 is only an example, and the communication system applicable to the present application is not limited to this.
  • the control channel and the data channel are mapped on the transmission resources using the mapping method shown in FIG. 2.
  • the control channel only occupies a few time-domain symbols, so the receiving end can decode the control channel after the time-domain symbols mapped by the control channel, instead of waiting for the data of a complete time slot to decode the control channel, so as to achieve The purpose of reducing delay.
  • the control channel is a second order PSCCH, that is, the control channel includes a first PSCCH and a second PSCCH.
  • the first PSCCH carries information used for resource sensing and information used to determine the second transmission resource (that is, the transmission resource occupied by the second PSCCH).
  • the information used for resource sensing is carried by the first PSCCH.
  • the first information field indication of the first SCI indicates that the information used to determine the second transmission resource is indicated by the second information field of the first SCI carried by the first PSCCH; the second PSCCH carries information used to demodulate the PSSCH.
  • the time-frequency positions of the first PSCCH and the second PSCCH are schematic, and should not be construed as limiting the time-frequency positions of the first PSCCH and the second PSCCH.
  • the above-mentioned information used for resource monitoring may include at least one of the following information: information of transmission resources of the PSSCH, priority information of services carried in the PSSCH, and indication information of reserved transmission resources.
  • the foregoing information used to demodulate the PSSCH may include at least one of the following information:
  • MCS Modulation and Coding Scheme
  • HARQ Hybrid Automatic Repeat reQuest
  • NDI New Data Indicator
  • the target identification information includes at least one of the following information: the device identification of the receiving end (the terminal device that receives the PSCCH), the group identification of the receiving end, and the service identification corresponding to the service carried by the PSSCH.
  • the target identification information may be the device identification of the receiving end; for multicast, the target identification information may be the group identification of the receiving end, that is, the identification of the device group to which the receiving end belongs; for broadcast, the target identification information may be the service identification. Only terminal devices that are interested in the service corresponding to the service identifier, or only terminal devices that need to receive the service, need to receive the PSSCH.
  • the receiving end terminal needs to detect the first PSCCH, and the transmission resource of the second PSCCH can be determined according to the information in the first PSCCH. Therefore, the receiving end does not need to blindly detect the second PSCCH.
  • the transmission resource used for the first PSCCH is usually pre-configured.
  • the resource pool of the first PSCCH is configured through pre-configuration or network configuration. In the resource pool, the position and size of each candidate transmission resource are known. Therefore, the receiving end can determine the transmission of each candidate.
  • the resource performs blind detection, and determines whether the first PSCCH exists according to the detection result.
  • the following describes the method for determining the transmission resource of the second PSCCH provided by the embodiment of the present application.
  • the method shown in FIG. 3 may be executed by the sending end of the side link, or may be executed by the receiving end of the side link, or may be executed by a network device.
  • the method 300 includes:
  • the third transmission resource includes the transmission resource of the PSSCH, as shown by the rectangle containing the PSSCH, the first PSCCH, and the second PSCCH in FIG. 2.
  • the third transmission resource may be a transmission resource determined according to configuration information received from a network device, or a transmission resource independently selected by the terminal device.
  • the third transmission resource is a transmission resource determined according to the information carried in the first PSCCH.
  • the transmission channel means transmitting the information carried by the channel
  • the receiving channel means receiving the information carried by the channel.
  • the third transmission resource is used to transmit the PSSCH, which means that the third resource is used to transmit the information carried by the PSSCH.
  • the third transmission resource further includes the first transmission resource for transmitting the first PSCCH.
  • the terminal device determining the second transmission resource within the third transmission resource includes determining the size and time-frequency position of the second transmission resource.
  • the size of the second transmission resource can be determined by the following method.
  • the terminal device may determine the size of the second transmission resource according to the information carried by the first PSCCH for determining the second transmission resource.
  • the foregoing information for determining the second transmission resource may include at least one of the following information: the format of the second PSCCH, the number of information bits of the second SCI carried by the second PSCCH, and the second SCI encoded information carried by the second PSCCH
  • the number of bits, the format of the second SCI carried by the second PSCCH, the aggregation level of the second PSCCH, the modulation method of the second SCI carried by the second PSCCH, the code rate of the second SCI carried by the second PSCCH, and the second PSCCH occupied The size of frequency domain resources and the number of time domain symbols occupied by the second PSCCH.
  • the first SCI carried by the first PSCCH includes a second information field
  • the second information field indicates the format of the second SCI. According to the format of the second SCI, at least one of the following information can be determined:
  • the number of information bits of the second SCI that is, the total number of bits of each information field included in the second SCI; optionally, the number of information bits of the second SCI includes Cyclic Redundancy Check (CRC) bits;
  • CRC Cyclic Redundancy Check
  • Number of bits after the second SCI encoding that is, the number of bits of the information bits of the second SCI after channel encoding; where the channel encoding is, for example, a low density parity check (LDPC) code, or a polarization (Polar )code.
  • LDPC low density parity check
  • Poly polarization
  • the size of the second transmission resource can be determined according to the format of the second SCI.
  • the number of bits encoded by the second SCI can be determined according to the format of the second SCI, and combined with the modulation mode of the second PSCCH, the number of symbols modulated by the second SCI can be determined, thereby determining the size of the second transmission resource.
  • the number of information bits of the second SCI can be determined according to the format of the second SCI, and combined with the modulation mode and code rate of the second PSCCH, the number of symbols modulated by the second SCI can be determined, thereby determining the second transmission resource. size.
  • the second information field indicates the aggregation level of the second PSCCH, and the aggregation level is used to indicate the number of Control Channel Elements (CCEs), and the second PSCCH can be determined according to the aggregation level of the second PSCCH The size of the transmission resource.
  • CCEs Control Channel Elements
  • the second information field carries index information of the second transmission resource in the resource set.
  • the resource set is preset or pre-configured.
  • the terminal device can determine the index information from the table according to the index information.
  • the size of the resource corresponding to the information, that is, the size of the second transmission resource is determined according to the index information and the table.
  • the second information field indicates the size of frequency domain resources and/or the number of time domain symbols occupied by the second PSCCH, and the terminal device may determine the size of the second transmission resource according to the second information field.
  • the second PSCCH may use the same MCS as the PSSCH, and the second PSCCH may also use a certain modulation method, for example, quadrature phase shift keying (quadrature phase shift keying, QPSK) modulation. If the MCS of the second PSCCH and the PSSCH are different, the modulation mode and/or code rate used by the second PSCCH may be indicated in the first PSCCH.
  • a certain modulation method for example, quadrature phase shift keying (quadrature phase shift keying, QPSK) modulation.
  • QPSK quadrature phase shift keying
  • the second PSCCH may use the same code rate as the PSSCH, or may use a different code rate from the PSSCH.
  • the second PSCCH uses a code rate lower than that of the PSSCH, thereby improving the detection performance of the second PSCCH.
  • the code rate of the second PSCCH can be reduced by increasing the transmission resource of the second PSCCH.
  • the terminal device may adjust the size of the initial second transmission resource based on the first parameter to determine the final size of the second transmission resource.
  • the size of the second transmission resource determined by the information used to determine the second transmission resource carried by the first PSCCH is the initial second transmission resource size.
  • the first parameter can be interpreted as: the ratio of the size of the initial second transmission resource to the size of the final second transmission resource.
  • the terminal device may obtain the first parameter, and determine the final size of the second transmission resource according to the first parameter and the size of the initial second transmission resource.
  • the above-mentioned first parameter may be configured by a high-level, or may be configured by a network device, or may be pre-configured; for the receiving end, it may also obtain the first parameter through the first PSCCH.
  • the sidelink control information (SCI) carried by the second PSCCH has 80 bits of information, and the MCS of the PSSCH corresponds to 16 quadrature amplitude modulation (QAM) modulation and 0.5 code rate.
  • the terminal device can adjust the transmission resource occupied by the second PSCCH according to the first parameter. For example, in mode 1, when the network device allocates resources for the terminal device, the first parameter is carried in the downlink control information (DCI). When the first parameter is equal to 2, the terminal device determines that the size of the transmission resource occupied by the second PSCCH is 80 REs.
  • DCI downlink control information
  • the number of information bits of the second SCI carried by the second PSCCH is 80 bits, and the MCS of the PSSCH corresponds to 16QAM modulation and a code rate of 0.5; if the code rate of the second PSCCH is the same as the code rate of the PSSCH, and the second PSCCH
  • the terminal device can adjust the transmission resource occupied by the second PSCCH according to the first parameter.
  • the resource pool configuration information includes the first parameter.
  • the terminal device determines the transmission resource occupied by the second PSCCH
  • the size of the resource is 120 REs.
  • the method for determining the location of the second transmission resource is described below.
  • the location of the second transmission resource may be determined by the transmission resource of the first PSCCH, or the location of the second transmission resource may be determined by the transmission resource of the PSSCH.
  • the time domain position of the second transmission resource configured by the network starts from the symbol next to the last time domain symbol occupied by the first PSCCH, and the frequency domain start position is the same as the frequency domain start position of the PSSCH.
  • the resource mapping is performed in a domain manner, so that the location of the second transmission resource can be determined.
  • the first SCI further includes a first information field, where the first information field is used to determine whether the frequency domain resource of the second transmission resource is adjacent to the frequency domain resource of the first transmission resource; and/or, the first The information field is used to determine whether the time domain resource of the second transmission resource is adjacent to the time domain resource of the first transmission resource.
  • the first information field is two bits, and when the first information field is "00", it means that the frequency domain resource of the second transmission resource is not adjacent to the frequency domain resource of the first transmission resource, and the second transmission resource When the first information field is "01", it means that the frequency domain resource of the second transmission resource is not adjacent to the frequency domain resource of the first transmission resource,
  • the time domain resource of the second transmission resource is adjacent to the time domain resource of the first transmission resource; when the first information field is "10", it represents the frequency domain resource of the second transmission resource and the frequency domain of the first transmission resource Resources are adjacent, and the time domain resource of the second transmission resource is not adjacent to the time domain resource of the first transmission resource; when the first information field is "11", it means that the frequency domain resource of the second transmission resource is the same as that of the first transmission resource.
  • the frequency domain resources of the transmission resources are adjacent, and the time domain resources of the second transmission resource are adjacent to the time domain resources of the first transmission resource.
  • the time domain resource A and the time domain resource B are adjacent to each other including the following three situations: the time domain resource A is located before the time domain resource B; the time domain resource A is located behind the time domain resource B; and the time domain resource A Located before and after time domain resource B.
  • the time domain resources may be time domain symbols, for example, orthogonal frequency division multiplexing (OFDM) symbols, or other time domain resources, which are not limited in this application.
  • OFDM orthogonal frequency division multiplexing
  • Fig. 4 is a schematic diagram of a first transmission resource and a second transmission resource provided by an embodiment of the present application. For brevity, Figure 4 does not show PSSCH DMRS.
  • Figure 4 shows the transmission resources of 14 time-domain symbols, from left to right along the time axis from symbol 0 to symbol 13, and other similar graphics in the following are also all For this meaning.
  • the first PSCCH and the second PSCCH are both mapped on symbol 1 to symbol 3, and they are adjacent in the frequency domain.
  • the second PSCCH starts from the first time domain symbol occupied by the first PSCCH, and starts mapping from the frequency domain resource adjacent to the frequency domain resource of the first PSCCH, first frequency domain mapping, then time domain mapping, in the frequency domain
  • mapping the subcarriers are mapped in the order from low to high; in the time domain mapping, they are mapped in the order of time domain symbols from low to high.
  • the second PSCCH cannot be mapped on the RE occupied by the PSSCH DMRS.
  • the second PSCCH may be continuously mapped from the time domain symbols adjacent to the time domain symbols occupied by the first PSCCH, as shown in FIG. 5.
  • Figure 5 does not show PSSCH DMRS.
  • Fig. 6 is a schematic diagram of another first transmission resource and a second transmission resource provided by an embodiment of the present application. For brevity, Figure 6 does not show PSSCH DMRS.
  • the second PSCCH is mapped from the time domain symbol adjacent to the last time domain symbol occupied by the first PSCCH, first in the frequency domain and then in the time domain.
  • the terminal device can decode the second PSCCH on some symbols without waiting for the second PSCCH on all symbols to be decoded. Therefore, the mapping methods of frequency domain and then time domain are as follows: Conducive to reducing the decoding delay.
  • the first transmission resource and the second transmission resource are adjacent in the frequency domain; in Fig. 5, the first transmission resource and the second transmission resource are adjacent in the frequency domain and the time domain; in Fig. 6, the first transmission resource and The second transmission resource is adjacent in time domain.
  • the terminal device (receiving end) can determine the location and size of the second transmission resource according to the first information field, the second information field, the first parameter and other information in the first SCI.
  • the first information domain, the second information domain, and the first parameter may also be located in different SCIs.
  • the receiver Since fading will occur during signal transmission, the receiver needs to estimate the channel performance based on the DMRS.
  • the channel estimation results of the time domain resources closer to the time domain position of the DMRS are more accurate. Mapping the second PSCCH to the time domain resources that are the same as and/or adjacent to the time domain resources of the DMRS of the PSSCH can improve the channel estimation performance of the second PSCCH.
  • the time domain resources of the second transmission resource are the same as the time domain resources of the PSSCH DMRS. That is, when the second PSCCH can be all mapped to the time domain resources of the PSSCH DMRS, the second PSCCH is preferentially mapped to the time domain resources of the PSSCH DMRS.
  • the first PSCCH is mapped on symbol 1 to symbol 3, and the time domain resources occupied by PSSCH DMRS are symbol 4, symbol 5, symbol 9, and symbol 10.
  • the frequency domain resources corresponding to the foregoing four symbols can be mapped to all the second PSCCHs, and then all the second PSCCHs are mapped to the foregoing four symbols.
  • the second PSCCH is preferentially mapped to the symbol at the front position in the time domain, so that the receiving end can detect the second PSCCH as soon as possible and reduce the data transmission delay.
  • the first PSCCH is mapped on symbol 1 to symbol 3, and the time domain resources occupied by PSSCH DMRS are symbol 1, symbol 6, and symbol 11.
  • the frequency domain resources corresponding to the above three symbols can be mapped to all the second PSCCHs, and then all the second PSCCHs are mapped to the above three symbols.
  • the second PSCCH is preferentially mapped to the symbol at the front position in the time domain, so that the receiving end can detect the second PSCCH as soon as possible and reduce the data transmission delay.
  • the first PSCCH is also mapped on symbol 1, and the transmission resource mapped by the second PSCCH (ie, the second transmission resource) does not overlap with the transmission resource mapped by the first PSCCH (ie, the first transmission resource), so that the same can be avoided.
  • the above non-overlapping can be interpreted as: all REs included in the second transmission resource are completely different from all REs included in the first transmission resource.
  • the second transmission resource includes the same and adjacent time domain resources as the time domain resources of the PSSCH DMRS.
  • the resources on the time domain symbols containing PSSCH DMRS can only be mapped to part of the second PSCCH
  • part of the second PSCCH is preferentially mapped to the time domain resources of PSSCH DMRS, and the remaining part is mapped to the time domain resources of PSSCH DMRS.
  • this can map as many second PSCCHs as possible to the time domain resources where the PSSCH DMRS is located, and improve the accuracy of the channel estimation result of the second PSCCH.
  • the first PSCCH is mapped on symbol 1 to symbol 3, and the time domain resources occupied by PSSCH DMRS are symbol 4 and symbol 9.
  • the frequency domain resources corresponding to the above two symbols can only be mapped to part of the second PSCCH. After mapping part of the second PSCCH to the above two symbols, map the remaining second PSCCH to the time domain resources adjacent to symbol 4. on.
  • the remaining second PSCCH when the remaining second PSCCH is mapped to the time domain resource adjacent to the time domain resource of the PSSCH DMRS, the remaining second PSCCH is mapped to the time domain symbol adjacent to the time domain symbol of the first PSSCH DMRS Domain resources.
  • the remaining second PSCCH if the remaining second PSCCH needs to be mapped to two time-domain symbols, the remaining second PSCCH is prioritized to be mapped to the time-domain symbol (ie symbol 4) of the first PSSCH DMRS.
  • the time-domain symbol of for example, it is mapped to the time-domain symbol 5 and the time-domain symbol 6; or it is mapped to the time-domain symbol 3 and the time-domain symbol 5.
  • the time domain resources of the second transmission resource are adjacent to the time domain resources of the PSSCH DMRS.
  • the second PSCCH is mapped to the time domain resources adjacent to the time domain resources of PSSCH DMRS.
  • the first PSCCH is mapped on symbol 1 to symbol 3.
  • the time domain resources occupied by PSSCH DMRS are symbol 4 and symbol 9.
  • Each PSSCH DMRS symbol supports DMRS of two antenna ports, and The DMRS of the two antenna ports is frequency division multiplexed. That is, on the same PSSCH DRMS symbol, the DMRS of different antenna ports occupy different frequency domain resources.
  • the second PSCCH is mapped from the adjacent time domain symbol after the first PSSCH DMRS time domain symbol, for example, the mapping starts from symbol 5.
  • the mapping is performed in the order of frequency domain and then time domain, that is, on symbol 5
  • the second PSSCH is mapped in the order of subcarriers from low to high, and then the second PSSCH is mapped on symbol 6.
  • PSSCH and so on, until all the second PSCCHs are mapped.
  • the first PSCCH is mapped on symbol 1 to symbol 3.
  • the time domain resources occupied by PSSCH DMRS are symbol 4 and symbol 9.
  • Each PSSCH DMRS symbol supports DMRS of two antenna ports, and The DMRS of the two antenna ports is frequency division multiplexed. That is, on the same PSSCH DRMS symbol, the DMRS of different antenna ports occupy different frequency domain resources.
  • the time domain symbols of PSSCH DMRS in Figure 11 no longer have frequency domain resources for the second PSCCH mapping, then the second PSCCH can start from the symbol adjacent to the time domain symbol of the first PSSCH DMRS (ie symbol 4) Mapping.
  • the second PSCCH is first mapped to the time domain symbol adjacent to the first PSSCH DMRS time domain symbol, and then mapped to the next adjacent time domain symbol, and so on. For example, if the first PSSCH DMRS time domain symbol is symbol 4, the second PSCCH is first mapped to the frequency domain resources corresponding to symbol 3 and symbol 5. If there is a second PSCCH remaining, then the second PSCCH is mapped to On symbol 2 and symbol 6, and so on, until the second PSCCH is mapped.
  • the second PSCCH when the second PSCCH has multiple available PSSCH DMRS time domain resources, the second PSCCH may be preferentially mapped on the first (that is, the first one in the time domain position) PSSCH DMRS time domain resource. If the first PSSCH DMRS time domain resource is insufficient to carry the second PSCCH, the second PSCCH may be mapped on the time domain resource adjacent to the first PSSCH DMRS time domain resource. In this way, the receiving end can detect the second PSCCH as soon as possible, so as to decode the PSSCH as soon as possible, and reduce the data transmission delay.
  • the first PSCCH is mapped on symbols 1 to 3, and the time domain resources occupied by PSSCH DMRS are symbol 5 and symbol 10.
  • the second PSCCH can be mapped to Symbol 5 and symbols 6 and 7 adjacent to symbol 5 do not map the second PSCCH on symbol 10.
  • the first PSCCH is mapped on Symbol 1 to Symbol 3.
  • the time domain resources occupied by PSSCH DMRS are Symbol 4 and Symbol 9.
  • the second PSCCH can be mapped to Symbol 4 and symbols 5 and 6 adjacent to symbol 4 do not map the second PSCCH on symbol 9.
  • the time domain resource of the second transmission resource is located in a time slot, and the time domain resource of the second transmission resource does not include the first time domain symbol and the last time domain of the time slot symbol.
  • the first symbol is usually used for automatic gain control (Automatic Gain Control, AGC), which is usually different from demodulation, and the last symbol is usually used as a guard period (GP), and data is usually not mapped. Therefore, mapping the second PSCCH on symbols other than the first symbol and the last symbol can prevent missing information from being detected.
  • AGC Automatic Gain Control
  • GP guard period
  • the apparatus for determining the side link transmission resources includes hardware structures and/or software modules corresponding to each function.
  • the embodiments of the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a certain function is executed by hardware or computer software-driven hardware depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.
  • the embodiment of the present application can divide the functional unit of the device for determining the side link transmission resource according to the foregoing method example.
  • each function can be divided into each functional unit, or two or more functions can be integrated in One processing unit.
  • the above-mentioned integrated unit can be implemented in the form of hardware or software functional unit. It should be noted that the division of units in the embodiments of the present application is illustrative, and is only a logical function division, and there may be other division methods in actual implementation.
  • FIG. 14 is a schematic structural diagram of an apparatus for determining side link transmission resources provided by an embodiment of the present application.
  • the device 1400 includes a processing unit 1410, and the processing unit 1410 can perform the following steps:
  • the second transmission resource includes a time domain resource that is the same as and/or adjacent to the time domain resource of the DMRS of the PSSCH, and the second transmission resource is used for The second physical PSCCH is transmitted, and the third transmission resource further includes the first transmission resource used to transmit the first PSCCH.
  • the time domain resource of the DMRS when the time domain resource of the DMRS can carry all the second PSCCH, the time domain resource of the second transmission resource is the same as the time domain resource of the DMRS; or, when the time domain resource of the DMRS When the domain resources can carry part of the second PSCCH, the second transmission resources include time domain resources that are the same as and adjacent to the time domain resources of the DMRS; or, when the time domain resources of the DMRS cannot carry the In the second PSCCH, the time domain resource of the second transmission resource is adjacent to the time domain resource of the DMRS.
  • the processing unit 1410 is further configured to: when the time domain resources of the DMRS can carry all or part of the second PSCCH, preferentially map the second PSCCH on the time domain resources of the DMRS.
  • the processing unit 1410 is further configured to: map the second PSCCH on the second transmission resource in a frequency domain first and then a time domain.
  • the second transmission resource includes a time domain resource that is the same as and/or adjacent to a time domain resource of the demodulation reference signal, including: the second transmission resource includes a first time domain with the DMRS Time domain resources with the same and/or adjacent resources.
  • the first SCI carried by the first PSCCH includes a first information field; wherein, the first information field is used to determine the frequency domain resource of the second transmission resource and the frequency domain resource of the first transmission resource. Whether the domain resources are adjacent, and/or the first information domain is used to determine whether the time domain resources of the second transmission resource and the time domain resources of the first transmission resource are adjacent.
  • the first SCI carried by the first PSCCH includes a second information field, and the second information field is used to determine the size of the second transmission resource.
  • the second information field includes at least one of the following information: the aggregation level of the second PSCCH; the format of the second SCI carried by the second PSCCH; the frequency domain occupied by the second PSCCH The size of the resource; the number of time-domain symbols occupied by the second PSCCH; the index information of the second transmission resource in a resource set, where the resource set is preset or pre-configured.
  • the processing unit 1410 is further configured to: obtain a first parameter; the processing unit 1410 is specifically configured to: determine the size of the second transmission resource according to the first parameter and the second information field.
  • the processing unit 1410 is specifically configured to: obtain the first parameter in at least one of the following ways: obtain the first parameter according to pre-configuration information or preset information; and receive the configuration information from the network device through the receiving unit Obtain the first parameter according to the configuration information; obtain the first parameter according to the resource pool configuration information; receive the first PSCCH through the receiving unit, and obtain the first parameter according to the first PSCCH.
  • the second transmission resource has no overlap with the first transmission resource.
  • the time domain resource of the second transmission resource is located in a time slot, and the time domain resource of the second transmission resource does not include the first time domain symbol and the last time domain of the time slot symbol.
  • the first SCI carried by the first PSCCH includes a third information field
  • the third information field includes information used for resource sensing
  • the second SCI carried by the second PSCCH includes information used for demodulation.
  • Information about the PSSCH is not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to, but not limited to resource sensing, and the second SCI carried by the second PSCCH includes information used for demodulation.
  • Information about the PSSCH includes a third information field, the third information field includes information used for resource sensing, and the second SCI carried by the second PSCCH includes information used for demodulation.
  • the information used for resource monitoring includes at least one of the following information: information of the third transmission resource, priority information of the service carried in the PSSCH, and indication information of reserved transmission resources .
  • the information used to demodulate the PSSCH includes at least one of the following information: MCS, number of transmission layers, HARQ process number, NDI, identification information of the terminal device that sends the PSSCH, and target identification information .
  • FIG. 15 shows a schematic structural diagram of a terminal device provided by an embodiment of the present application.
  • the dotted line in Figure 15 indicates that the unit or the module is optional.
  • the device 1500 may be used to implement the methods described in the foregoing method embodiments.
  • the device 1500 may be a terminal device or a chip.
  • the device 1500 includes one or more processors 1501, and the one or more processors 1501 can support the device 1500 to implement the methods in the method embodiments corresponding to FIGS. 3 to 13.
  • the processor 1501 may be a general-purpose processor or a special-purpose processor.
  • the processor 1501 may be a central processing unit (CPU).
  • the CPU can be used to control the device 1500, execute a software program, and process data of the software program.
  • the device 1500 may further include a communication unit 1505 to implement signal input (reception) and output (transmission).
  • the device 1500 may be a chip, and the communication unit 1505 may be an input and/or output circuit of the chip, or the communication unit 1505 may be a communication interface of the chip, and the chip may be used as a terminal device or a network device or other wireless communication device made of.
  • the device 1500 may be a terminal device or a network device
  • the communication unit 1505 may be a transceiver of the terminal device or the network device
  • the communication unit 1505 may be a transceiver circuit of the terminal device or the network device.
  • the device 1500 may include one or more memories 1502 with a program 1504 stored thereon.
  • the program 1504 can be run by the processor 1501 to generate instructions 1503 so that the processor 1501 executes the methods described in the foregoing method embodiments according to the instructions 1503.
  • the memory 1502 may also store data.
  • the processor 1501 may also read data stored in the memory 1502. The data may be stored at the same storage address as the program 1504, or the data may be stored at a different storage address from the program 1504.
  • the processor 1501 and the memory 1502 may be provided separately or integrated together, for example, integrated on a system-on-chip (SOC) of the terminal device.
  • SOC system-on-chip
  • the device 1500 may also include an antenna 1506.
  • the communication unit 1505 is configured to implement the transceiver function of the device 1500 through the antenna 1506.
  • each step of the foregoing method embodiment may be completed by a logic circuit in a hardware form or an instruction in a software form in the processor 1501.
  • the processor 1501 may be a CPU, a digital signal processor (digital signal processor, DSP), an application specific integrated circuit (ASIC), a field programmable gate array (field programmable gate array, FPGA) or other programmable logic devices , For example, discrete gates, transistor logic devices, or discrete hardware components.
  • the embodiments of the present application also provide a computer program product, which, when executed by the processor 1501, implements the method described in any method embodiment in the embodiments of the present application.
  • the computer program product may be stored in the memory 1502, for example, a program 1504, and the program 1504 is finally converted into an executable object file that can be executed by the processor 1501 through processing processes such as preprocessing, compilation, assembly, and linking.
  • the embodiment of the present application also provides a computer-readable storage medium on which a computer program is stored, and when the computer program is executed by a computer, the method described in any method embodiment in the present application is implemented.
  • the computer program can be a high-level language program or an executable target program.
  • the computer-readable storage medium is, for example, the memory 1502.
  • the memory 1502 may be a volatile memory or a non-volatile memory, or the memory 1502 may include both a volatile memory and a non-volatile memory.
  • the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory.
  • the volatile memory may be random access memory (RAM), which is used as an external cache.
  • RAM random access memory
  • static random access memory static random access memory
  • dynamic RAM dynamic RAM
  • DRAM dynamic random access memory
  • synchronous dynamic random access memory synchronous DRAM, SDRAM
  • double data rate synchronous dynamic random access memory double data rate SDRAM, DDR SDRAM
  • enhanced synchronous dynamic random access memory enhanced SDRAM, ESDRAM
  • synchronous connection dynamic random access memory serial DRAM, SLDRAM
  • direct rambus RAM direct rambus RAM, DR RAM
  • the disclosed system, device, and method may be implemented in other ways. For example, some features of the method embodiments described above may be ignored or not implemented.
  • the device embodiments described above are merely illustrative.
  • the division of units is only a logical function division. In actual implementation, there may be other division methods, and multiple units or components may be combined or integrated into another system.
  • the coupling between the units or the coupling between the components may be direct coupling or indirect coupling, and the foregoing coupling includes electrical, mechanical, or other forms of connection.
  • the size of the sequence number of each process does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not correspond to the embodiments of the present application.
  • the implementation process constitutes any limitation.
  • system and “network” in this article are often used interchangeably in this article.
  • the term “and/or” in this article is only an association relationship that describes associated objects, which means that there can be three relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, alone There are three cases of B.
  • the character “/" in this text generally indicates that the associated objects before and after are in an "or" relationship.

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Abstract

本申请实施例公开了一种确定侧行链路传输资源的方法，包括：确定第三传输资源，所述第三传输资源用于传输PSSCH；在所述第三传输资源内确定第二传输资源，所述第二传输资源包括与所述PSSCH的DMRS的时域资源相同和/或相邻的时域资源，所述第二传输资源用于传输第二PSCCH，所述第三传输资源还包括用于传输第一PSCCH的第一传输资源。信号传输过程中会产生衰落现象，对于距离DMRS的时域位置较近的时域资源，其信道估计结果更加准确。第二传输资源包含与PSSCH的DMRS的时域资源相同和/或相邻的时域资源，因此，第二传输资源承载的第二PSCCH具有更加准确的信道估计结果。

Description

确定侧行链路传输资源的方法和装置 技术领域
本申请涉及通信领域，具体涉及一种确定侧行链路传输资源的方法和装置。
背景技术
第五代(5th generation，5G)通信系统支持车与万物(vehicle to everything，V2X)通信，V2X通信是一种侧行链路(sidelink)传输技术，一个终端设备无需通过网络设备的转发即可直接与另一个终端设备通信，因而具有更高的频谱效率和更低的传输时延。
在V2X通信中，侧行链路的发送端可以使用数据信道的传输资源传输控制信道。例如，侧行链路的发送端可以使用物理侧行共享信道(physical sidelink shared channel，PSSCH)的传输资源传输物理侧行控制信道(physical sidelink control channel，PSCCH)。上述PSCCH可以是2阶PSCCH，即，上述PSCCH可以包括第一PSCCH和第二PSCCH。第一PSCCH可以承载用于侧行链路的接收端进行侦听的信息，第二PSCCH可以承载解调PSSCH的信息。
第一PSCCH还可以包含指示第二PSCCH的传输资源的信息，以便于降低侧行链路的接收端检测第二PSCCH的复杂度。侧行链路的接收端可以通过盲检接收第一PSCCH，但是第二PSCCH的传输资源如何配置尚未有相关结论。
发明内容
本申请实施例提供了一种确定侧行链路传输资源的方法和装置，能够有效配置第二PSCCH的传输资源。
第一方面，提供了一种确定侧行链路传输资源的方法，包括：确定第三传输资源，所述第三传输资源用于传输PSSCH；在所述第三传输资源内确定第二传输资源，所述第二传输资源包括与所述PSSCH的解调参考信号(demodulation reference signal，DMRS)的时域资源相同和/或相邻的时域资源，所述第二传输资源用于传输第二PSCCH，所述第三传输资源还包括用于传输第一PSCCH的第一传输资源。
第二方面，提供了一种确定侧行链路传输资源的装置，该装置可以实现第一方面中的方法所对应的功能，所述功能可以通过硬件实现，也可以通过硬件执行相应的软件实现。所述硬件或软件包括一个或多个与上述功能相对应的单元或模块。
在一种可能的设计中，该装置为终端设备或网络设备或芯片。该装置可以包括处理单元和收发单元。当该装置是终端设备或网络设备时，该处理单元可以是处理器，该收发单元可以是收发器；该终端设备或该网络设备还可以包括存储单元，该存储单元可以是存储器；该存储单元用于存储指令，该处理单元执行该存储单元所存储的指令，以使该终端设备或该网络设备执行第一方面所述的方法。当该装置是芯片时，该处理单元可以是处理器，该收发单元可以是输入/输出接口、管脚或电路等；该处理单元执行存储单 元所存储的指令，以使包含该芯片的终端设备或网络设备执行第一方面所述的方法，该存储单元可以是该芯片内的存储单元(例如，寄存器、缓存等)，也可以是位于该芯片外部的存储单元(例如，只读存储器、随机存取存储器等)。
第三方面，提供了一种计算机可读存储介质，该计算机可读存储介质中存储了计算机程序，该计算机程序被处理器执行时，使得处理器执行第一方面所述的方法。
第四方面，提供了一种计算机程序产品，包括计算机程序代码，当该计算机程序代码被处理器运行时，使得处理器执行第一方面所述的方法。
第五方面，提供了一种计算机程序，当其在计算机上运行时，使得计算机执行第一方面所述的方法。
附图说明
图1是一种适用于本申请的通信系统的示意图；
图2是本申请实施例提供的一种数据信道和控制信道的映射方法的示意图；
图3是本申请实施例提供的一种确定侧行链路传输资源的方法的示意图；
图4是本申请实施例提供的一种侧行链路传输资源的示意图；
图5是本申请实施例提供的另一种侧行链路传输资源的示意图；
图6是本申请实施例提供的再一种侧行链路传输资源的示意图；
图7是本申请实施例提供的再一种侧行链路传输资源的示意图；
图8是本申请实施例提供的再一种侧行链路传输资源的示意图；
图9是本申请实施例提供的再一种侧行链路传输资源的示意图；
图10是本申请实施例提供的再一种侧行链路传输资源的示意图；
图11是本申请实施例提供的再一种侧行链路传输资源的示意图；
图12是本申请实施例提供的再一种侧行链路传输资源的示意图；
图13是本申请实施例提供的再一种侧行链路传输资源的示意图；
图14是本申请实施例提供的一种确定侧行链路传输资源的装置的示意图；
图15是本申请实施例提供的一种确定侧行链路传输资源的设备的示意图。
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。
图1示出了适用于本申请的通信系统100的示意图。
系统100包括网络设备110、终端设备121和终端设备122。终端设备121和终端设备122可以是具有通信功能的车辆，也可以是车载电子系统，还可以是手机，还可以是可穿戴电子设备，还可以是其它执行V2X协议的通信设备。
网络设备110可以是LTE系统中的演进型基站(evolutional node B，eNB)，还可以是5G通信系统中的基站(gNB)，上述网络设备仅是举例说明，网络设备110还可以为中继站、接入点、车载设备、可穿戴设备以及其它类型的设备。
在通过侧行链路传输数据之前，终端设备121与终端设备122可以通过网络设备110的指示确定侧行链路传输资源。终端设备121与终端设备122也可以不通过网络设备110的指示确定侧行链路传输资源。
上述两个示例即侧行链路通信的两种传输模式，集中调度传输模式(也可称为模式1)和分布式传输模式(也可以称为模式2)。下面，对两种传输模式做简单介绍：
集中调度传输模式：在该模式下，终端设备根据网络设备分配的资源发送V2X数据。由于终端设备的资源是由网络设备统一分配的，因此，不会发生邻近终端设备分配相同资源的情况，集中调度传输模式具有更好的传输可靠性。不过，由于终端设备和网络设备之间需要交互信令，相比于分布式传输模式，采用集中调度传输模式发送数据的传输时延更长。
分布式传输模式：在有网络覆盖的场景下，网络设备可以通过系统信息块(system information block，SIB)或无线资源控制(radio resource control，RRC)信令为终端设备配置资源池，终端设备发送V2X数据时，可以通过随机选择、基于侦听预留机制或基于部分侦听预留机制自主从资源池中获取部分资源来发送数据。在没有网络覆盖的场景下，终端设备自主从预配置信息配置的资源池中获取部分资源来发送数据。预配置信息可以是终端设备在出厂时配置在终端设备内部的信息，也可以是由网络设备预先配置的、终端设备保存在内部的信息。由于终端设备能够自主选择资源，可能会出现不同终端设备选择相同资源发送数据的情况，因此，相比于集中调度传输模式，采用分布式传输模式发送数据的可靠性更低。
在分布式传输模式中，当终端设备从资源池中选取部分传输资源进行数据传输时，对于周期性传输的业务，终端设备可以预留下一次传输的传输资源，避免其它用户抢占该传输资源；对于非周期传输的业务，终端设备不预留传输资源。
通信系统100仅是一个示例，适用于本申请的通信系统不限于此。
在V2X通信中，为了降级时延，控制信道和数据信道采用图2所示的映射方式映射在传输资源上。其中，控制信道只占用几个时域符号，因此接收端可以在控制信道映射的时域符号后即可解码控制信道，而不需要等接收完整个时隙的数据后再解码控制信道，从而达到降低时延的目的。
图2中，控制信道是2阶PSCCH，即，控制信道包括第一PSCCH和第二PSCCH。其中，第一PSCCH承载用于资源侦听的信息以及用于确定第二传输资源(即，第二PSCCH占用的传输资源)的信息，例如，用于资源侦听的信息通过第一PSCCH承载的第一SCI的第一信息域指示，用于确定第二传输资源的信息通过第一PSCCH承载的第一SCI的第二信息域指示；第二PSCCH承载用于解调PSSCH的信息。图2中，第一PSCCH和第二PSCCH的时频位置是示意性的，不应被理解为对第一PSCCH和第二PSCCH的时频 位置的限定。
上述用于资源侦听的信息可以包括以下信息中的至少一种：PSSCH的传输资源的信息、PSSCH中承载的业务的优先级信息、以及预留传输资源的指示信息。
上述用于解调PSSCH的信息可以包括以下信息中的至少一种：
调制编码策略(Modulation and Coding Scheme，MCS)、传输层数、混合自动重传请求(Hybrid Automatic Repeat reQuest，HARQ)进程号、新数据指示(New Data Indicator，NDI)、发送PSSCH的终端设备的标识信息、以及目标标识信息。
目标标识信息包括以下信息中的至少一种：接收端(接收PSCCH的终端设备)的设备标识、接收端的组标识、以及PSSCH承载的业务对应的业务标识。
对于单播，目标标识信息可以是接收端的设备标识；对于组播，目标标识信息可以是接收端的组标识，即，接收端所属的设备组的标识；对于广播，目标标识信息可以是业务标识，只有对所述业务标识对应的业务感兴趣的终端设备，或者，只有需要接收该业务的终端设备，才需要接收所述PSSCH。
接收端终端需要检测第一PSCCH，根据第一PSCCH中的信息可以确定第二PSCCH的传输资源，因此，接收端不需要盲检测第二PSCCH。为了降低接收端盲检测第一PSCCH的复杂度，通常预配置用于第一PSCCH的传输资源。例如，通过预配置或者网络配置的方式配置第一PSCCH的资源池，在该资源池中，每个候选的传输资源的位置和大小是确知的，因此，接收端可以对每个候选的传输资源进行盲检测，根据检测结果确定是否存在第一PSCCH。
下面介绍本申请实施例提供的确定第二PSCCH的传输资源的方法。图3所示的方法可以由侧行链路的发送端执行，也可以由侧行链路的接收端执行，还可以由网络设备执行。
如图3所示，方法300包括：
S310，确定第三传输资源，所述第三传输资源用于传输PSSCH。
第三传输资源包括PSSCH的传输资源，如图2中包含PSSCH、第一PSCCH和第二PSCCH的矩形所示。当方法300由终端设备(发送端)执行时，第三传输资源可以是根据从网络设备接收的配置信息确定的传输资源，也可以是终端设备自主选取的传输资源。当方法300由终端设备(接收端)执行时，第三传输资源是根据第一PSCCH中承载的信息确定的传输资源。
在本申请的所有实施例中，传输信道表示传输该信道承载的信息，接收信道表示接收该信道承载的信息。例如，第三传输资源用于传输PSSCH，表示第三资源用于传输PSSCH承载的信息。
S320，在所述第三传输资源内确定第二传输资源，所述第二传输资源包括与所述PSSCH的DMRS的时域资源相同和/或相邻的时域资源，所述第二传输资源用于传输第二PSCCH，所述第三传输资源还包括用于传输第一PSCCH的第一传输资源。
终端设备在第三传输资源内确定第二传输资源包括确定第二传输资源的大小和时频 位置。
可选地，可以通过下述方法确定第二传输资源的大小。
终端设备可以根据第一PSCCH承载的用于确定第二传输资源的信息确定第二传输资源的大小。
上述用于确定第二传输资源的信息可以包括以下信息中的至少一种：第二PSCCH的格式、第二PSCCH承载的第二SCI的信息比特数、第二PSCCH承载的第二SCI编码后的比特数、第二PSCCH承载的第二SCI的格式、第二PSCCH的聚合等级、第二PSCCH承载的第二SCI的调制方式、第二PSCCH承载的第二SCI的码率、第二PSCCH占用的频域资源的大小、以及第二PSCCH占用的时域符号的数量。
在一个实施方式中，第一PSCCH承载的第一SCI包括第二信息域，第二信息域指示第二SCI的格式。根据第二SCI的格式可以确定以下信息中的至少一种：
第二SCI的信息比特数：即第二SCI包括的各个信息域的总比特数；可选地，第二SCI的信息比特数包括循环冗余校验(Cyclic Redundancy Check，CRC)比特；
第二SCI编码后的比特数：即第二SCI的信息比特经过信道编码后的比特数；其中，信道编码例如是低密度奇偶校验(Low Density Parity Check，LDPC)码，或者极化(Polar)码。
根据第二SCI的格式可以确定第二传输资源的大小。例如，根据第二SCI的格式可以确定第二SCI编码后的比特数，再结合第二PSCCH的调制方式，即可确定第二SCI调制后的符号个数，从而确定第二传输资源的大小。又例如，根据第二SCI的格式可以确定第二SCI的信息比特数，再结合第二PSCCH的调制方式和码率，可以确定第二SCI调制后的符号个数，从而确定第二传输资源的大小。
在另一实施方式中，第二信息域指示第二PSCCH的聚合等级，聚合等级用于指示控制信道单元(Control Channel Element，CCE)的个数，根据第二PSCCH的聚合等级可以确定第二PSCCH的传输资源的大小。
在另一实施方式中，第二信息域携带第二传输资源在资源集合中的索引信息，该资源集合为预设的或预配置的，终端设备可以根据该索引信息从表格中确定与该索引信息对应的资源大小，即，根据索引信息和表格确定第二传输资源的大小。
在另一实施方式中，第二信息域指示第二PSCCH占用的频域资源的大小和/或时域符号的数量，终端设备可以根据第二信息域确定第二传输资源的大小。
第二PSCCH可以采用和PSSCH相同的MCS，第二PSCCH也可以固定使用某种调制方式，例如使用正交相移键控(quadrature phase shift keying，QPSK)调制。如果第二PSCCH和PSSCH的MCS不同，可以在第一PSCCH中指示第二PSCCH使用的调制方式和/或码率。
可选地，第二PSCCH可以使用和PSSCH相同的码率，也可以使用和PSSCH不同的码率。例如，第二PSCCH使用相对于PSSCH的码率更低的码率，从而提升第二PSCCH的检测性能。可选地，可以通过增大第二PSCCH的传输资源降低其码率。
例如，终端设备可以基于第一参数调整初始第二传输资源的大小以确定最终的第二传输资源的大小。此时，通过第一PSCCH承载的用于确定第二传输资源的信息确定的第二传输资源的大小是所述初始第二传输资源大小。
第一参数可以被解释为：初始第二传输资源的大小与最终的第二传输资源的大小的比值。
终端设备(发送端或接收端)可以获取第一参数，并根据第一参数和初始第二传输资源的大小确定最终的第二传输资源的大小。上述第一参数可以是高层配置的，也可以是网络设备配置的，还可以是预配置的；对于接收端，其还可以通过第一PSCCH获取第一参数。
例如，第二PSCCH承载的侧行链路控制信息(sidelink control information，SCI)的信息比特数是80比特，PSSCH的MCS对应着16正交振幅调制(quadrature amplitude modulation，QAM)调制和0.5码率；若第二PSCCH的调制编码方式和PSSCH的调制编码方式相同，则第二PSCCH需要占用40个资源单元(resource element，RE)，即，80/(0.5*4)＝40。终端设备可以根据第一参数调整第二PSCCH占用的传输资源，例如，在模式1中，网络设备为该终端设备分配资源时，在下行控制信息(downlink control information，DCI)中携带第一参数，当第一参数等于2时，终端设备确定第二PSCCH占用的传输资源的大小为80个RE。
又例如，第二PSCCH承载的第二SCI的信息比特数是80比特，PSSCH的MCS对应着16QAM调制和0.5码率；若第二PSCCH的码率和PSSCH的码率相同，并且，第二PSCCH的调制方式为QPSK调制，则第二PSCCH需要占用80个RE，即，80/(0.5*2)＝80。终端设备可以根据第一参数调整第二PSCCH占用的传输资源，例如，在模式2中，资源池配置信息中包括第一参数，当第一参数等于1.5时，终端设备确定第二PSCCH占用的传输资源的大小是120个RE。
下面介绍确定第二传输资源的位置的方法。
可选地，第二传输资源的位置可以通过第一PSCCH的传输资源确定，或者，第二传输资源的位置可以通过PSSCH的传输资源确定。
例如，网络配置第二传输资源的时域位置从第一PSCCH占据的最后一个时域符号的下一个符号开始，频域起始位置和PSSCH的频域起始位置相同，按照先频域后时域的方式进行资源映射，从而可以确定第二传输资源的位置。
可选地，第一SCI还包括第一信息域，其中，第一信息域用于确定第二传输资源的频域资源与第一传输资源的频域资源是否相邻；和/或，第一信息域用于确定第二传输资源的时域资源与第一传输资源的时域资源是否相邻。
例如，第一信息域为两个比特，当第一信息域为“00”时，表示第二传输资源的频域资源与第一传输资源的频域资源不相邻，并且，第二传输资源的时域资源与第一传输资源的时域资源不相邻；当第一信息域为“01”时，表示第二传输资源的频域资源与第一传输资源的频域资源不相邻，并且，第二传输资源的时域资源与第一传输资源的时域资源 相邻；当第一信息域为“10”时，表示第二传输资源的频域资源与第一传输资源的频域资源相邻，并且，第二传输资源的时域资源与第一传输资源的时域资源不相邻；当第一信息域为“11”时，表示第二传输资源的频域资源与第一传输资源的频域资源相邻，并且，第二传输资源的时域资源与第一传输资源的时域资源相邻。
在本申请实施例中，时域资源A与时域资源B相邻包括以下三种情况：时域资源A位于时域资源B之前；时域资源A位于时域资源B之后；时域资源A位于时域资源B之前和之后。此外，时域资源可以是时域符号，例如，正交频分复用(orthogonal frequency division multiplexing，OFDM)符号，也可以是其它时域资源，本申请对此不做限定。
图4是本申请实施例提供的一种第一传输资源和第二传输资源的示意图。为了简洁，图4未示出PSSCH DMRS。
图4中，面积最小的一个矩形表示一个RE，图4示出了14个时域符号的传输资源，沿时间轴从左到右依次为符号0到符号13，下文中其它类似的图形也均为此含义。
第一PSCCH和第二PSCCH均映射在符号1至符号3上，二者在频域上相邻。第二PSCCH从第一PSCCH占用的第一个时域符号开始，并且，从与第一PSCCH的频域资源相邻的频域资源开始映射，先频域映射，再时域映射，在频域映射时，按照子载波从低到高的顺序映射；在时域映射时，按照时域符号从低到高的顺序映射。第二PSCCH不能映射在PSSCH DMRS占用的RE上。若第一PSCCH占用的时域符号不足以映射全部的第二PSCCH，则可以从与第一PSCCH占用的时域符号相邻的时域符号继续映射第二PSCCH，如图5所示。为了简洁，图5未示出PSSCH DMRS。
图6是本申请实施例提供的另一种第一传输资源和第二传输资源的示意图。为了简洁，图6未示出PSSCH DMRS。
第二PSCCH从与第一PSCCH占用的最后一个时域符号相邻的时域符号开始映射，先频域映射，再时域映射。对于一些编码方式，终端设备接收到部分符号上的第二PSCCH即可进行译码，无需等待接收到所有符号上的第二PSCCH后再译码，因此，先频域后时域的映射方式有利于降低译码时延。
图4中，第一传输资源和第二传输资源频域相邻；图5中，第一传输资源和第二传输资源频域相邻且时域相邻；图6中，第一传输资源和第二传输资源时域相邻。
终端设备(接收端)可以根据第一SCI中的第一信息域，第二信息域，第一参数等信息确定第二传输资源的位置和大小。可选地，第一信息域，第二信息域和第一参数也可以位于不同的SCI中。
由于信号传输过程中会产生衰落现象，因此，接收端需要根据DMRS估计信道性能。距离DMRS的时域位置较近的时域资源，其信道估计结果更加准确。把第二PSCCH映射到与PSSCH的DMRS的时域资源相同和/或相邻的时域资源上可以提高第二PSCCH的信道估计的性能。
下面，结合几个附图说明本申请实施例提供的第二PSCCH的几种映射方法。
方法一。
当包含PSSCH DMRS的时域符号上的资源能够承载全部第二PSCCH时，第二传输资源的时域资源与PSSCH DMRS的时域资源相同。即，当第二PSCCH能够全部映射到PSSCH DMRS的时域资源上时，优先将第二PSCCH映射到PSSCH DMRS的时域资源上。
如图7所示，第一PSCCH映射在符号1至符号3上，PSSCH DMRS占用的时域资源为符号4、符号5、符号9和符号10。上述四个符号对应的频域资源能够映射全部第二PSCCH，则将第二PSCCH全部映射到上述四个符号上。可选地，将第二PSCCH优先映射在时域位置靠前的符号上，以便于接收端尽早检测到第二PSCCH，降低数据的传输时延。
如图8所示，第一PSCCH映射在符号1至符号3上，PSSCH DMRS占用的时域资源为符号1、符号6和符号11。上述三个符号对应的频域资源能够映射全部第二PSCCH，则将第二PSCCH全部映射到上述三个符号上。可选地，将第二PSCCH优先映射在时域位置靠前的符号上，以便于接收端尽早检测到第二PSCCH，降低数据的传输时延。其中，符号1上还映射有第一PSCCH，第二PSCCH映射的传输资源(即，第二传输资源)与第一PSCCH映射的传输资源(即，第一传输资源)不重叠，从而能够避免同一个时频资源上传输不同信号造成的干扰。上述不重叠可以被解释为：第二传输资源包含的全部RE与第一传输资源包含的全部RE完全不同。
方法二。
当包含PSSCH DMRS的时域符号上的资源能够承载部分第二PSCCH时，第二传输资源包括与PSSCH DMRS的时域资源相同和相邻的时域资源。例如，当包含PSSCH DMRS的时域符号上的资源仅能映射部分第二PSCCH时，优先将部分第二PSCCH映射到PSSCH DMRS的时域资源上，剩余部分再映射到与PSSCH DMRS的时域资源相邻的时域资源上，这样能够将尽可能多的第二PSCCH映射到PSSCH DMRS所在的时域资源上，提高第二PSCCH的信道估计结果的准确性。
如图9所示，第一PSCCH映射在符号1至符号3上，PSSCH DMRS占用的时域资源为符号4和符号9。上述两个符号对应的频域资源只能映射部分第二PSCCH，则将部分第二PSCCH映射到上述两个符号上后，再将剩余的第二PSCCH映射到与符号4相邻的时域资源上。
可选地，将剩余的第二PSCCH映射到与PSSCH DMRS的时域资源相邻的时域资源上时，把剩余的第二PSCCH映射到与第一个PSSCH DMRS的时域符号相邻的时域资源上。例如，在图9中，如果剩余的第二PSCCH需要映射到两个时域符号上，则优先把剩余的第二PSCCH映射到与第一个PSSCH DMRS的时域符号(即符号4)相邻的时域符号上，例如，映射到时域符号5和时域符号6上；或者映射到时域符号3和时域符号5上。
方法三。
当包含PSSCH DMRS的时域符号上的资源不能承载第二PSCCH时，第二传输资源的时域资源与PSSCH DMRS的时域资源相邻。例如，当包括PSSCH DMRS的时域符号 上的资源已全部被PSSCH DMRS占用时，将第二PSCCH映射到与PSSCH DMRS的时域资源相邻的时域资源上。
如图10所示，第一PSCCH映射在符号1至符号3上，PSSCH DMRS占用的时域资源为符号4和符号9，其中，每个PSSCH DMRS符号支持两个天线端口的DMRS，并且，该两个天线端口的DMRS是频分复用的。即，在同一个PSSCH DRMS符号上，不同的天线端口的DMRS占用不同的频域资源。图10中的PSSCH DMRS的时域符号上已无可供第二PSCCH映射的频域资源，则第二PSCCH可以从与第一个PSSCH DMRS的时域符号(即符号4)相邻的符号开始映射。可选地，第二PSCCH从在第一个PSSCH DMRS时域符号之后并且相邻的时域符号开始映射，例如，从符号5开始映射。在映射第二PSCCH的资源时，按照先频域再时域的顺序进行映射，即在符号5上，按照子载波从低到高的顺序映射第二PSSCH，然后再在符号6上映射第二PSSCH，以此类推，直到映射完所有的第二PSCCH为止。
如图11所示，第一PSCCH映射在符号1至符号3上，PSSCH DMRS占用的时域资源为符号4和符号9，其中，每个PSSCH DMRS符号支持两个天线端口的DMRS，并且，该两个天线端口的DMRS是频分复用的。即，在同一个PSSCH DRMS符号上，不同的天线端口的DMRS占用不同的频域资源。图11中的PSSCH DMRS的时域符号上已无可供第二PSCCH映射的频域资源，则第二PSCCH可以从与第一个PSSCH DMRS的时域符号(即符号4)相邻的符号开始映射。可选地，第二PSCCH先映射到与第一个PSSCH DMRS时域符号相邻的时域符号上，再映射到次相邻的时域符号上，以此类推。例如，第一个PSSCH DMRS时域符号是符号4，则第二PSCCH先映射到符号3和符号5对应的频域资源上，如果还有剩余的第二PSCCH时，再将第二PSCCH映射到符号2和符号6上，依次类推，直到第二PSCCH映射完为止。
可选地，当第二PSCCH有多个可用的PSSCH DMRS时域资源时，第二PSCCH可以优先映射在第一个(即，时域位置最前的一个)PSSCH DMRS时域资源上。若第一个PSSCH DMRS时域资源不足以承载第二PSCCH，则可以将第二PSCCH映射在第一个PSSCH DMRS时域资源相邻的时域资源上。这样，可以使得接收端尽早检测到第二PSCCH，以便于尽快解码PSSCH，降低数据的传输时延。
如图12所示，第一PSCCH映射在符号1至符号3上，PSSCH DMRS占用的时域资源为符号5和符号10，为了使接收端尽早检测到第二PSCCH，可以将第二PSCCH映射到符号5以及与符号5相邻的符号6和符号7上，不在符号10上映射第二PSCCH。
如图13所示，第一PSCCH映射在符号1至符号3上，PSSCH DMRS占用的时域资源为符号4和符号9，为了使接收端尽早检测到第二PSCCH，可以将第二PSCCH映射到符号4以及与符号4相邻的符号5和符号6上，不在符号9上映射第二PSCCH。
可选地，本申请实施例中，第二传输资源的时域资源位于一个时隙内，并且，第二传输资源的时域资源不包括时隙的第一个时域符号和最后一个时域符号。
一个时隙中，第一个符号通常用于自动增益控制(Automatic Gain Control，AGC)， 通常不同于解调，最后一个符号通常作为保护间隔(guard period，GP)，通常不映射数据。因此，将第二PSCCH映射在除第一个符号和最后一个符号以外的符号上可以避免信息被漏检。
上文详细介绍了本申请实施例提供的确定侧行链路传输资源的方法的示例。可以理解的是，确定侧行链路传输资源的装置为了实现上述功能，其包含了执行各个功能相应的硬件结构和/或软件模块。本领域技术人员应该很容易意识到，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，本申请实施例能够以硬件或硬件和计算机软件的结合形式来实现。某个功能究竟以硬件还是计算机软件驱动硬件的方式来执行，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。
本申请实施例可以根据上述方法示例对确定侧行链路传输资源的装置进行功能单元的划分，例如，可以将各个功能划分为各个功能单元，也可以将两个或两个以上的功能集成在一个处理单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。需要说明的是，本申请实施例中对单元的划分是示意性的，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。
图14是本申请实施例提供的一种确定侧行链路传输资源的装置的结构示意图。该装置1400包括处理单元1410，处理单元1410可以执行以下步骤：
确定第三传输资源，所述第三传输资源用于传输PSSCH；
在所述第三传输资源内确定第二传输资源，所述第二传输资源包括与所述PSSCH的DMRS的时域资源相同和/或相邻的时域资源，所述第二传输资源用于传输第二物理PSCCH，所述第三传输资源还包括用于传输第一PSCCH的第一传输资源。
可选地，当所述DMRS的时域资源能够承载全部所述第二PSCCH时，所述第二传输资源的时域资源与所述DMRS的时域资源相同；或者，当所述DMRS的时域资源能够承载部分所述第二PSCCH时，所述第二传输资源包括与所述DMRS的时域资源相同和相邻的时域资源；或者，当所述DMRS的时域资源不能承载所述第二PSCCH时，所述第二传输资源的时域资源与所述DMRS的时域资源相邻。
可选地，处理单元1410还用于：当所述DMRS的时域资源能够承载全部或部分所述第二PSCCH时，将所述第二PSCCH优先映射在所述DMRS的时域资源上。
可选地，处理单元1410还用于：将所述第二PSCCH在所述第二传输资源上按照先频域后时域的方式映射。
可选地，所述第二传输资源包括与解调参考信号的时域资源相同和/或相邻的时域资源，包括：所述第二传输资源包括与所述DMRS的第一个时域资源相同和/或相邻的时域资源。
可选地，所述第一PSCCH承载的第一SCI包括第一信息域；其中，所述第一信息域用于确定所述第二传输资源的频域资源与所述第一传输资源的频域资源是否相邻，和/或，所述第一信息域用于确定所述第二传输资源的时域资源与所述第一传输资源的时域 资源是否相邻。
可选地，所述第一PSCCH承载的第一SCI包括第二信息域，所述第二信息域用于确定所述第二传输资源的大小。
可选地，所述第二信息域包括以下信息中的至少一种：所述第二PSCCH的聚合等级；所述第二PSCCH承载的第二SCI的格式；所述第二PSCCH占用的频域资源的大小；所述第二PSCCH占用的时域符号的数量；所述第二传输资源在资源集合中的索引信息，其中，所述资源集合为预设的或预配置的。
可选地，处理单元1410还用于：获取第一参数；处理单元1410具体用于：根据所述第一参数和所述第二信息域确定所述第二传输资源的大小。
可选地，处理单元1410具体用于：通过以下方式中的至少一种获取所述第一参数：根据预配置信息或者预设信息获取所述第一参数；通过接收单元从网络设备接收配置信息，根据所述配置信息获取所述第一参数；根据资源池配置信息获取所述第一参数；通过接收单元接收所述第一PSCCH，根据所述第一PSCCH获取所述第一参数。
可选地，所述第二传输资源与所述第一传输资源无重叠。
可选地，所述第二传输资源的时域资源位于一个时隙内，并且，所述第二传输资源的时域资源不包括所述时隙的第一个时域符号和最后一个时域符号。
可选地，所述第一PSCCH承载的第一SCI包括第三信息域，所述第三信息域包括用于资源侦听的信息，所述第二PSCCH承载的第二SCI包括用于解调所述PSSCH的信息。
可选地，所述用于资源侦听的信息包括以下信息中的至少一种：所述第三传输资源的信息、所述PSSCH中承载的业务的优先级信息、预留传输资源的指示信息。
可选地，所述用于解调所述PSSCH的信息包括以下信息中的至少一种：MCS、传输层数、HARQ进程号、NDI、发送所述PSSCH的终端设备的标识信息及目标标识信息。
装置1400执行确定侧行链路传输资源的方法的具体方式以及产生的有益效果可以参见方法实施例中的相关描述。
图15示出了本申请实施例提供的一种终端设备的结构示意图。图15中的虚线表示该单元或该模块为可选的。设备1500可用于实现上述方法实施例中描述的方法。设备1500可以是终端设备或芯片。
设备1500包括一个或多个处理器1501，该一个或多个处理器1501可支持设备1500实现图3至图13所对应方法实施例中的方法。处理器1501可以是通用处理器或者专用处理器。例如，处理器1501可以是中央处理器(central processing unit，CPU)。CPU可以用于对设备1500进行控制，执行软件程序，处理软件程序的数据。设备1500还可以包括通信单元1505，用以实现信号的输入(接收)和输出(发送)。
例如，设备1500可以是芯片，通信单元1505可以是该芯片的输入和/或输出电路，或者，通信单元1505可以是该芯片的通信接口，该芯片可以作为终端设备或网络设备或其它无线通信设备的组成部分。
又例如，设备1500可以是终端设备或网络设备，通信单元1505可以是该终端设备 或该网络设备的收发器，或者，通信单元1505可以是该终端设备或该网络设备的收发电路。
设备1500中可以包括一个或多个存储器1502，其上存有程序1504，程序1504可被处理器1501运行，生成指令1503，使得处理器1501根据指令1503执行上述方法实施例中描述的方法。可选地，存储器1502中还可以存储有数据。可选地，处理器1501还可以读取存储器1502中存储的数据，该数据可以与程序1504存储在相同的存储地址，该数据也可以与程序1504存储在不同的存储地址。
处理器1501和存储器1502可以单独设置，也可以集成在一起，例如，集成在终端设备的系统级芯片(system on chip，SOC)上。
设备1500还可以包括天线1506。通信单元1505用于通过天线1506实现设备1500的收发功能。
处理器1501执行确定侧行链路传输资源的方法的具体方式以及产生的有益效果可以参见方法实施例中的相关描述。
应理解，上述方法实施例的各步骤可以通过处理器1501中的硬件形式的逻辑电路或者软件形式的指令完成。处理器1501可以是CPU、数字信号处理器(digital signal processor，DSP)、专用集成电路(application specific integrated circuit，ASIC)、现场可编程门阵列(field programmable gate array，FPGA)或者其它可编程逻辑器件，例如，分立门、晶体管逻辑器件或分立硬件组件。
本申请实施例还提供了一种计算机程序产品，该计算机程序产品被处理器1501执行时实现本申请实施例中任一方法实施例所述的方法。
该计算机程序产品可以存储在存储器1502中，例如是程序1504，程序1504经过预处理、编译、汇编和链接等处理过程最终被转换为能够被处理器1501执行的可执行目标文件。
本申请实施例还提供了一种计算机可读存储介质，其上存储有计算机程序，该计算机程序被计算机执行时实现本申请中任一方法实施例所述的方法。该计算机程序可以是高级语言程序，也可以是可执行目标程序。
该计算机可读存储介质例如是存储器1502。存储器1502可以是易失性存储器或非易失性存储器，或者，存储器1502可以同时包括易失性存储器和非易失性存储器。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)。
本领域的技术人员可以清楚地了解到，为了描述的方便和简洁，上述描述的装置和设备的具体工作过程以及产生的技术效果，可以参考前述方法实施例中对应的过程和技术效果，在此不再赘述。
在本申请所提供的几个实施例中，所揭露的系统、装置和方法，可以通过其它的方式实现。例如，以上所描述的方法实施例的一些特征可以忽略，或不执行。以上所描述的装置实施例仅仅是示意性的，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，多个单元或组件可以结合或者可以集成到另一个系统。另外，各单元之间的耦合或各个组件之间的耦合可以是直接耦合，也可以是间接耦合，上述耦合包括电的、机械的或其它形式的连接。
应理解，在本申请的各种实施例中，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，而不应对本申请的实施例的实施过程构成任何限定。
另外，本文中术语“系统”和“网络”在本文中常被可互换使用。本文中的术语“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。
总之，以上所述仅为本申请技术方案的较佳实施例而已，并非用于限定本申请的保护范围。凡在本申请的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本申请的保护范围之内。

Claims (36)

  1. 一种确定侧行链路传输资源的方法，其特征在于，包括：
    确定第三传输资源，所述第三传输资源用于传输物理侧行链路共享信道PSSCH；
    在所述第三传输资源内确定第二传输资源，所述第二传输资源包括与所述PSSCH的解调参考信号DMRS的时域资源相同和/或相邻的时域资源，所述第二传输资源用于传输第二物理侧行链路控制信道PSCCH，所述第三传输资源还包括用于传输第一PSCCH的第一传输资源。
  2. 根据权利要求1所述的方法，其特征在于，
    当所述DMRS的时域资源能够承载全部所述第二PSCCH时，所述第二传输资源的时域资源与所述DMRS的时域资源相同；或者，
    当所述DMRS的时域资源能够承载部分所述第二PSCCH时，所述第二传输资源包括与所述DMRS的时域资源相同和相邻的时域资源；或者，
    当所述DMRS的时域资源不能承载所述第二PSCCH时，所述第二传输资源的时域资源与所述DMRS的时域资源相邻。
  3. 根据权利要求1或2所述的方法，其特征在于，所述方法还包括：
    当所述DMRS的时域资源能够承载全部或部分所述第二PSCCH时，将所述第二PSCCH优先映射在所述DMRS的时域资源上。
  4. 根据权利要求1或2所述的方法，其特征在于，所述方法还包括：
    将所述第二PSCCH在所述第二传输资源上按照先频域后时域的方式映射。
  5. 根据权利要求1至4中任一项所述的方法，其特征在于，所述第二传输资源包括与解调参考信号的时域资源相同和/或相邻的时域资源，包括：
    所述第二传输资源包括与所述DMRS的第一个时域资源相同和/或相邻的时域资源。
  6. 根据权利要求1至5中任一项所述的方法，其特征在于，所述第一PSCCH承载的第一侧行链路控制信息SCI包括第一信息域，
    所述第一信息域用于确定所述第二传输资源的频域资源与所述第一传输资源的频域资源是否相邻；和/或，
    所述第一信息域用于确定所述第二传输资源的时域资源与所述第一传输资源的时域资源是否相邻。
  7. 根据权利要求1至6中任一项所述的方法，其特征在于，所述第一PSCCH承载的第一SCI包括第二信息域，所述第二信息域用于确定所述第二传输资源的大小。
  8. 根据权利要求7所述的方法，其特征在于，所述第二信息域包括以下信息中的至少一种：
    所述第二PSCCH的聚合等级；
    所述第二PSCCH承载的第二SCI的格式；
    所述第二PSCCH占用的频域资源的大小；
    所述第二PSCCH占用的时域符号的数量；
    所述第二传输资源在资源集合中的索引信息，其中，所述资源集合为预设的或预配置的。
  9. 根据权利要求7或8所述的方法，其特征在于，所述方法还包括：
    获取第一参数；
    所述在所述第三传输资源内确定第二传输资源，包括：
    根据所述第一参数和所述第二信息域确定所述第二传输资源的大小。
  10. 根据权利要求9所述的方法，其特征在于，所述获取第一参数，包括：
    通过以下方式中的至少一种获取所述第一参数：
    根据预配置信息或者预设信息获取所述第一参数；
    从网络设备接收配置信息；根据所述配置信息获取所述第一参数；
    根据资源池配置信息获取所述第一参数；
    接收所述第一PSCCH；根据所述第一PSCCH获取所述第一参数。
  11. 根据权利要求1至10中任一项所述的方法，其特征在于，所述第二传输资源与所述第一传输资源无重叠。
  12. 根据权利要求1至11中任一项所述的方法，其特征在于，所述第二传输资源的时域资源位于一个时隙内，并且，所述第二传输资源的时域资源不包括所述时隙的第一个时域符号和最后一个时域符号。
  13. 根据权利要求1至12中任一项所述的方法，其特征在于，所述第一PSCCH承载的第一SCI包括第三信息域，所述第三信息域包括用于资源侦听的信息，所述第二PSCCH承载的第二SCI包括用于解调所述PSSCH的信息。
  14. 根据权利要求13所述的方法，其特征在于，所述用于资源侦听的信息包括以下信息中的至少一种：
    所述第三传输资源的信息、所述PSSCH中承载的业务的优先级信息、预留传输资源的指示信息。
  15. 根据权利要求13或14所述的方法，其特征在于，所述用于解调所述PSSCH的信息包括以下信息中的至少一种：
    调制编码策略MCS、传输层数、混合自动重传请求HARQ进程号、新数据指示NDI、发送所述PSSCH的终端设备的标识信息及目标标识信息。
  16. 一种确定侧行链路传输资源的装置，其特征在于，包括处理单元，用于：
    确定第三传输资源，所述第三传输资源用于传输物理侧行链路共享信道PSSCH；
    在所述第三传输资源内确定第二传输资源，所述第二传输资源包括与所述PSSCH的解调参考信号DMRS的时域资源相同和/或相邻的时域资源，所述第二传输资源用于传输第二物理侧行链路控制信道PSCCH，所述第三传输资源还包括用于传输第一PSCCH的第一传输资源。
  17. 根据权利要求16所述的装置，其特征在于，
    当所述DMRS的时域资源能够承载全部所述第二PSCCH时，所述第二传输资源的时域资源与所述DMRS的时域资源相同；或者，
    当所述DMRS的时域资源能够承载部分所述第二PSCCH时，所述第二传输资源包括与所述DMRS的时域资源相同和相邻的时域资源；或者，
    当所述DMRS的时域资源不能承载所述第二PSCCH时，所述第二传输资源的时域资源与所述DMRS的时域资源相邻。
  18. 根据权利要求16或17所述的装置，其特征在于，所述处理单元还用于：
    当所述DMRS的时域资源能够承载全部或部分所述第二PSCCH时，将所述第二PSCCH优先映射在所述DMRS的时域资源上。
  19. 根据权利要求16或17所述的装置，其特征在于，所述处理单元还用于：
    将所述第二PSCCH在所述第二传输资源上按照先频域后时域的方式映射。
  20. 根据权利要求16至19中任一项所述的装置，其特征在于，所述第二传输资源包括与解调参考信号的时域资源相同和/或相邻的时域资源，包括：
    所述第二传输资源包括与所述DMRS的第一个时域资源相同和/或相邻的时域资源。
  21. 根据权利要求16至20中任一项所述的装置，其特征在于，所述第一PSCCH承载的第一侧行链路控制信息SCI包括第一信息域，
    所述第一信息域用于确定所述第二传输资源的频域资源与所述第一传输资源的频域资源是否相邻；和/或，
    所述第一信息域用于确定所述第二传输资源的时域资源与所述第一传输资源的时域资源是否相邻。
  22. 根据权利要求16至21中任一项所述的装置，其特征在于，所述第一PSCCH承载的第一SCI包括第二信息域，所述第二信息域用于确定所述第二传输资源的大小。
  23. 根据权利要求22所述的装置，其特征在于，所述第二信息域包括以下信息中的至少一种：
    所述第二PSCCH的聚合等级；
    所述第二PSCCH承载的第二SCI的格式；
    所述第二PSCCH占用的频域资源的大小；
    所述第二PSCCH占用的时域符号的数量；
    所述第二传输资源在资源集合中的索引信息，其中，所述资源集合为预设的或预配置的。
  24. 根据权利要求22或23所述的装置，其特征在于，所述处理单元还用于：
    获取第一参数；
    所述处理单元具体用于：
    根据所述第一参数和所述第二信息域确定所述第二传输资源的大小。
  25. 根据权利要求24所述的装置，其特征在于，所述处理单元具体用于：
    通过以下方式中的至少一种获取所述第一参数：
    根据预配置信息或者预设信息获取所述第一参数；
    从网络设备接收配置信息；根据所述配置信息获取所述第一参数；
    根据资源池配置信息获取所述第一参数；
    接收所述第一PSCCH；根据所述第一PSCCH获取所述第一参数。
  26. 根据权利要求16至25中任一项所述的装置，其特征在于，所述第二传输资源与所述第一传输资源无重叠。
  27. 根据权利要求16至26中任一项所述的装置，其特征在于，所述第二传输资源的时域资源位于一个时隙内，并且，所述第二传输资源的时域资源不包括所述时隙的第一个时域符号和最后一个时域符号。
  28. 根据权利要求16至27中任一项所述的装置，其特征在于，所述第一PSCCH承载的第一SCI包括第三信息域，所述第三信息域包括用于资源侦听的信息，所述第二PSCCH承载的第二SCI包括用于解调所述PSSCH的信息。
  29. 根据权利要求28所述的装置，其特征在于，所述用于资源侦听的信息包括以下信息中的至少一种：
    所述第三传输资源的信息、所述PSSCH中承载的业务的优先级信息、预留传输资源的指示信息。
  30. 根据权利要求28或29所述的装置，其特征在于，所述用于解调所述PSSCH的信息包括以下信息中的至少一种：
    调制编码策略MCS、传输层数、混合自动重传请求HARQ进程号、新数据指示NDI、发送所述PSSCH的终端设备的标识信息及目标标识信息。
  31. 一种终端设备，其特征在于，包括：处理器和存储器，所述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15中任一项所述的方法。
  32. 一种网络设备，其特征在于，包括：处理器和存储器，所述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、2、5、11和12中任一项所述的方法。
  33. 一种芯片，其特征在于，包括：处理器，用于从存储器中调用并运行计算机程序，使得安装有所述芯片的设备执行：如权利要求1至15中任一项所述的方法。
  34. 一种计算机可读存储介质，其特征在于，用于存储计算机程序，所述计算机程序使得计算机执行：如权利要求1至15中任一项所述的方法。
  35. 一种计算机程序产品，其特征在于，包括计算机程序指令，该计算机程序指令使得计算机执行：如权利要求1至15中任一项所述的方法。
  36. 一种计算机程序，其特征在于，所述计算机程序使得计算机执行如权利要求1中15中任一项所述的方法。
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BR112021026719A2 (pt) 2022-04-12
IL289429A (en) 2022-02-01
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FI3975642T3 (fi) 2024-12-13
JP7749639B2 (ja) 2025-10-06
JP7387771B2 (ja) 2023-11-28
US12439378B2 (en) 2025-10-07
CN114430538A (zh) 2022-05-03
AU2019468770A1 (en) 2022-02-03
CN114430538B (zh) 2023-07-21
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JP2024020391A (ja) 2024-02-14
AU2019468770B2 (en) 2025-11-06
CN113812194A (zh) 2021-12-17
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US20250294527A1 (en) 2025-09-18
KR20220072806A (ko) 2022-06-02
US20220124683A1 (en) 2022-04-21
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