WO2023123051A1 - 通信方法和终端设备 - Google Patents
通信方法和终端设备 Download PDFInfo
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- WO2023123051A1 WO2023123051A1 PCT/CN2021/142488 CN2021142488W WO2023123051A1 WO 2023123051 A1 WO2023123051 A1 WO 2023123051A1 CN 2021142488 W CN2021142488 W CN 2021142488W WO 2023123051 A1 WO2023123051 A1 WO 2023123051A1
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Definitions
- the present application relates to the technical field of communication, and more specifically, to a communication method and a terminal device.
- Sidelink communication can be performed between terminal devices through a sidelink (sidelink, SL).
- the relevant technology does not propose a positioning method based on the side link, so it cannot support the use case of the positioning based on the side link, and thus cannot meet the positioning requirements based on the side link.
- the present application provides a communication method and terminal equipment to support positioning based on sidelinks.
- a communication method includes: a terminal device transmits a first positioning reference signal PRS and first control information on a sidelink, and the first control information is used to indicate that the first One PRS.
- the second method provides a terminal device, the terminal device includes: a first transmission unit, configured to transmit a first positioning reference signal PRS and first control information on a sidelink, and the first control information uses to indicate the first PRS.
- a terminal device including a processor, a memory, and a communication interface, the memory is used to store one or more computer programs, and the processor is used to call the computer programs in the memory to make the terminal device Execute the method described in the first aspect.
- an embodiment of the present application provides a communication system, where the system includes the above-mentioned terminal device.
- the system may further include other devices that interact with the terminal device in the solutions provided by the embodiments of the present application.
- the embodiment of the present application provides a computer-readable storage medium, the computer-readable storage medium stores a computer program, and the computer program enables the terminal device to perform some or all of the steps in the method of the first aspect above .
- an embodiment of the present application provides a computer program product, wherein the computer program product includes a non-transitory computer-readable storage medium storing a computer program, and the computer program is operable to enable the terminal to execute the above-mentioned first Some or all of the steps in the method of one aspect.
- the computer program product can be a software installation package.
- the embodiment of the present application provides a chip, the chip includes a memory and a processor, and the processor can call and run a computer program from the memory to implement some or all of the steps described in the method of the first aspect above .
- a computer program product including a program, the program causes a computer to execute the method described in the first aspect.
- a computer program causes a computer to execute the method described in the first aspect.
- the terminal device may transmit the first PRS according to the indication of the first control information, and the terminal device may implement sidelink-based positioning according to the first PRS. Therefore, based on the method provided in this application, the use case of positioning based on the side link can be supported, and the positioning requirement based on the side link can be met.
- FIG. 1 is an example diagram of a system architecture of a wireless communication system to which an embodiment of the present application can be applied.
- Fig. 2 is an example diagram of a scenario of lateral communication within network coverage.
- Fig. 3 is an example diagram of a scenario of lateral communication with partial network coverage.
- Fig. 4 is an example diagram of a scenario of lateral communication outside network coverage.
- FIG. 5 is an example diagram of a broadcast-based lateral communication method.
- Fig. 6 is an example diagram of a unicast-based lateral communication manner.
- FIG. 7 is an example diagram of a multicast-based lateral communication manner.
- Fig. 8 is an example diagram of a time slot for sidelink communication.
- FIG. 9 is an example diagram of another time slot used for lateral communication.
- Fig. 10 is an example diagram of yet another time slot used for lateral communication.
- FIG. 11 is an example diagram of a PSSCH DMRS frequency domain location.
- FIG. 12 is a schematic flowchart of a communication method provided by an embodiment of the present application.
- FIG. 13 is a schematic diagram of a division method of a first time slot provided in an embodiment of the present application.
- FIG. 14 is a schematic diagram of a resource division method provided by an embodiment of the present application.
- FIG. 15 is a schematic diagram of another resource division method provided by the embodiment of the present application.
- FIG. 16 is a schematic diagram of another resource division method provided by the embodiment of the present application.
- FIG. 17 is a schematic diagram of another resource division method provided by the embodiment of the present application.
- FIG. 18 is a schematic structural diagram of a terminal device provided in an embodiment of the present application.
- FIG. 19 is a schematic structural diagram of another terminal device provided in an embodiment of the present application.
- FIG. 1 is a wireless communication system 100 applied in an embodiment of the present application.
- the wireless communication system 100 may include a network device 110 and a terminal device 120 .
- the network device 110 may be a device that communicates with the terminal device 120 .
- the network device 110 can provide communication coverage for a specific geographical area, and can communicate with the terminal device 120 located in the coverage area.
- the wireless communication system 100 may include multiple network devices, and the coverage of each network device may include other numbers of terminal devices, which is not limited in this embodiment of the present application.
- the wireless communication system 100 may further include other network entities such as a network controller and a mobility management entity, which is not limited in this embodiment of the present application.
- network entities such as a network controller and a mobility management entity, which is not limited in this embodiment of the present application.
- the technical solutions of the embodiments of the present application can be applied to various communication systems, for example: the fifth generation (5th generation, 5G) system or new radio (new radio, NR), long term evolution (long term evolution, LTE) system , LTE frequency division duplex (frequency division duplex, FDD) system, LTE time division duplex (time division duplex, TDD), etc.
- the technical solutions provided in this application can also be applied to future communication systems, such as the sixth generation mobile communication system, and satellite communication systems, and so on.
- the terminal equipment in the embodiment of the present application may also be called user equipment (user equipment, UE), access terminal, subscriber unit, subscriber station, mobile station, mobile station (mobile station, MS), mobile terminal (mobile terminal, MT) ), remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent, or user device.
- the terminal device in the embodiment of the present application may be a device that provides voice and/or data connectivity to users, and can be used to connect people, objects and machines, such as handheld devices with wireless connection functions, vehicle-mounted devices, and the like.
- the terminal device in the embodiment of the present application can be mobile phone (mobile phone), tablet computer (Pad), notebook computer, palmtop computer, mobile internet device (mobile internet device, MID), wearable device, virtual reality (virtual reality, VR) equipment, augmented reality (augmented reality, AR) equipment, wireless terminals in industrial control, wireless terminals in self driving, wireless terminals in remote medical surgery, smart Wireless terminals in smart grid, wireless terminals in transportation safety, wireless terminals in smart city, wireless terminals in smart home, etc.
- a terminal device can be used to act as a base station.
- a terminal device can act as a dispatching entity that provides sidelink signals between terminal devices in vehicle-to-everything (V2X) or device-to-device communication (device-to-device, D2D), etc. .
- V2X vehicle-to-everything
- D2D device-to-device
- a cell phone and an automobile communicate with each other using sidelink signals. Communication between cellular phones and smart home devices without relaying communication signals through base stations.
- a terminal device can be used to act as a base station.
- the network device in this embodiment of the present application may be a device for communicating with a terminal device, and the network device may also be called an access network device or a wireless access network device, for example, the network device may be a base station.
- the network device in this embodiment of the present application may refer to a radio access network (radio access network, RAN) node (or device) that connects a terminal device to a wireless network.
- radio access network radio access network, RAN node (or device) that connects a terminal device to a wireless network.
- the base station can broadly cover various names in the following, or replace with the following names, such as: Node B (NodeB), evolved base station (evolved NodeB, eNB), next generation base station (next generation NodeB, gNB), relay station, Access point, transmission point (transmitting and receiving point, TRP), transmission point (transmitting point, TP), primary station MeNB, secondary station SeNB, multi-standard radio (MSR) node, home base station, network controller, access node , wireless node, access point (access point, AP), transmission node, transceiver node, base band unit (base band unit, BBU), remote radio unit (Remote Radio Unit, RRU), active antenna unit (active antenna unit) , AAU), radio head (remote radio head, RRH), central unit (central unit, CU), distributed unit (distributed unit, DU), positioning nodes, etc.
- NodeB Node B
- eNB evolved base station
- next generation NodeB next generation NodeB
- a base station may be a macro base station, a micro base station, a relay node, a donor node, or the like, or a combination thereof.
- a base station may also refer to a communication module, modem or chip used to be set in the aforementioned equipment or device.
- the base station can also be a mobile switching center and a device-to-device (D2D), vehicle-to-vehicle (V2V), vehicle-to-everything (V2X), machine-to-machine (machine-to-machine) -machine, M2M) communication equipment that assumes the base station function, network side equipment in the 6G network, equipment that assumes the base station function in the future communication system, etc.
- Base stations can support networks of the same or different access technologies. The embodiment of the present application does not limit the specific technology and specific device form adopted by the network device.
- Base stations can be fixed or mobile.
- a helicopter or drone can be configured to act as a mobile base station, and one or more cells can move according to the location of the mobile base station.
- a helicopter or drone may be configured to serve as a device in communication with another base station.
- the network device in this embodiment of the present application may refer to a CU or a DU, or, the network device includes a CU and a DU.
- a gNB may also include an AAU.
- Network equipment and terminal equipment can be deployed on land, including indoors or outdoors, hand-held or vehicle-mounted; they can also be deployed on water; they can also be deployed on aircraft, balloons and satellites in the air.
- the scenarios where the network device and the terminal device are located are not limited.
- Sidelink communication refers to communication technology based on sidelinks.
- Sideline communication can be D2D or V2X, for example.
- Side communication supports direct communication data transmission between terminal devices. Direct transmission of communication data between terminal devices may have higher spectrum efficiency and lower transmission delay.
- the Internet of Vehicles system uses side-travel communication technology.
- sidelink communication according to the network coverage where the terminal device is located, sidelink communication can be divided into sidelink communication within network coverage, sidelink communication with partial network coverage, and sidelink communication outside network coverage.
- Fig. 2 is an example diagram of a scenario of lateral communication within network coverage.
- both terminal devices 120 a are within the coverage of the network device 110 . Therefore, both terminal devices 120a can receive the configuration signaling of the network device 110 (the configuration signaling in this application can also be replaced with configuration information), and determine the lateral configuration according to the configuration signaling of the network device 110 . After both terminal devices 120a are configured sidelink, sidelink communication can be performed on the sidelink.
- Fig. 3 is an example diagram of a scenario of lateral communication with partial network coverage.
- the terminal device 120a performs side communication with the terminal device 120b.
- the terminal device 120a is located within the coverage of the network device 110, so the terminal device 120a can receive the configuration signaling of the network device 110, and determine the sideline configuration according to the configuration signaling of the network device 110.
- the terminal device 120b is located outside the coverage of the network and cannot receive the configuration signaling of the network device 110 .
- the terminal device 120b may use pre-configuration (pre-configuration) information and/or information carried in a physical sidelink broadcast channel (physical sidelink broadcast channel, PSBCH) sent by the terminal device 120a located within the coverage of the network Determine side row configuration.
- PSBCH physical sidelink broadcast channel
- Fig. 4 is an example diagram of a scenario of lateral communication outside network coverage.
- both terminal devices 120b are located outside the network coverage.
- both terminal devices 120b can determine the side row configuration according to the pre-configuration information. After both terminal devices 120b are configured sidelink, sidelink communication can be performed on the sidelink.
- Certain standards or protocols (such as the 3rd Generation Partnership Project (3GPP)) define two modes (or transmission modes) of lateral communication: the first mode and the second mode.
- 3GPP 3rd Generation Partnership Project
- the resources of the terminal device are allocated by the network device.
- the terminal device can send data on the sidelink according to the resources allocated by the network device.
- the network device may allocate resources for a single transmission to the terminal device, and may also allocate resources for semi-static transmission to the terminal device.
- the first mode can be applied to a scenario covered by network devices, such as the scenario shown in FIG. 2 above. In the scenario shown in FIG. 2, the terminal device 120a is located within the network coverage of the network device 110, so the network device 110 can allocate resources used in the sidelink transmission process to the terminal device 120a.
- the terminal device can independently select one or more resources from a resource pool (resource pool, RP). Then, the terminal device can perform sidelink transmission according to the selected resources.
- a resource pool resource pool, RP
- the terminal device 120b is located outside the coverage of the cell. Therefore, the terminal device 120b can autonomously select resources from the pre-configured resource pool for sidelink transmission.
- the terminal device 120a may also autonomously select one or more resources from the resource pool configured by the network device 110 for sidelink transmission.
- resource selection for sidelink communication may include step S110 and step S120.
- step S110 the terminal device takes all available resources in the resource selection window as resource set A.
- the terminal device may exclude the resources in the resource set A, and use the excluded remaining resources as the candidate resource set.
- the terminal device can determine the corresponding time slot in the selection window by using the value set of the resource reservation period (resource reservation period) field in the resource pool configuration used.
- the terminal device may determine the resources excluded from the resource set A according to the measured reference signal receiving power (reference signal receiving power, RSPR). For example, if the terminal device detects a physical sidelink control channel (physical sidelink control channel, PSCCH) within the listening window, the terminal device may measure the RSRP of the PSCCH and/or the RSRP of the PSSCH scheduled by the PSCCH. If the measured RSRP is greater than the sidelink reference signal received power (SL-RSRP) threshold, and according to the resource reservation information in the sidelink control information transmitted in the PSCCH, it is determined that the reserved resources are within the resource selection window, then The terminal device may exclude the corresponding resource from set A.
- RSPR reference signal receiving power
- the SL-RSRP threshold may be raised by 3dB, and the terminal device re-executes step S110.
- X can be any one in the value set, for example, the value set can be ⁇ 20, 35, 50 ⁇ .
- the terminal device may determine the parameter X from the value set according to the priority of the data to be sent. It should be noted that the SL-RSRP threshold may be related to the priority carried in the PSCCH sensed by the terminal equipment. The SL-RSRP threshold may also be related to the priority of data to be sent by the terminal device.
- the terminal device may select several resources from the candidate resource set, and these resources may be used as transmission resources for the initial transmission and/or retransmission of the sidelink communication.
- Certain sidelink communication systems support broadcast-based data transmission (hereinafter referred to as broadcast transmission).
- the terminal device at the receiving end may be any terminal device around the terminal device at the sending end.
- terminal device 1 is a transmitting terminal device
- the receiving terminal device corresponding to the transmitting terminal device is any terminal device around terminal device 1, for example, terminal device 2-terminal device in Figure 5 6.
- some communication systems also support unicast-based data transmission (hereinafter referred to as unicast transmission) and/or multicast-based data transmission (hereinafter referred to as multicast transmission).
- unicast transmission hereinafter referred to as unicast transmission
- multicast transmission hereinafter referred to as multicast transmission.
- NR-V2X hopes to support autonomous driving. Autonomous driving puts forward higher requirements for data interaction between vehicles. For example, data interaction between vehicles requires higher throughput, lower latency, higher reliability, larger coverage, more flexible resource allocation, etc. Therefore, in order to improve the data interaction performance between vehicles, NR-V2X introduces unicast transmission and multicast transmission.
- terminal device 1 For unicast transmission, the terminal device at the receiving end generally has only one terminal device. Taking FIG. 6 as an example, unicast transmission is performed between terminal device 1 and terminal device 2 .
- Terminal device 1 may be a transmitting terminal device
- terminal device 2 may be a receiving terminal device
- terminal device 1 may be a receiving terminal device
- terminal device 2 may be a transmitting terminal device.
- the receiving terminal device may be a terminal device in a communication group (group), or the receiving terminal device may be a terminal device within a certain transmission distance.
- group a communication group
- terminal device 1 terminal device 2, terminal device 3 and terminal device 4 form a communication group. If terminal device 1 sends data, other terminal devices (terminal device 2 to terminal device 4) in the group can all be receiving terminal devices.
- the allocation of time-domain resources can take time slots as the allocation granularity.
- the starting point and length of the time-domain symbols (may be referred to simply as symbols) used for sidelink transmission in a time slot can be set by the parameters sidelink start symbol (sl-startSLsymbols) and sidelink symbol length (sl-lengthSLsymbols) Configured separately.
- the time domain symbols may be, for example, orthogonal frequency division multiplexing (orthogonal frequency division multiplexing, OFDM) symbols.
- a physical sidelink shared channel (PSSCH) can be transmitted in the same time slot as its associated PSCCH. PSCCH can occupy 2 or 3 time domain symbols.
- the last symbol in a slot can be used as a guard period (GP).
- PSSCH and PSCCH can use the rest of the time domain symbols except for GP.
- the timeslots used for sidelink communications may also be referred to as sidelink timeslots.
- resources for physical sidelink feedback channel may also exist in one time slot. If PSFCH transmission resources are configured in a time slot, PSSCH and PSCCH cannot occupy the time-domain symbols used for PSFCH transmission, and the automatic gain control (automatic gain control, AGC) and GP symbols before this symbol.
- AGC automatic gain control
- FIG. 9 is an example diagram of another time slot used for lateral communication.
- the first symbol can be fixed for AGC.
- an end device can duplicate the information sent on the second symbol.
- a symbol can be reserved for switching between sending and receiving, that is, the terminal device can use this symbol to switch between the sending state and the receiving state.
- the PSCCH may occupy two or three symbols starting from the second side row symbol.
- the number of physical resource blocks (physical resource blocks, PRBs) occupied by the PSCCH is within the subband range of one PSSCH.
- the PSCCH can be frequency division multiplexed with the PSSCH on the symbol where the PSCCH is located.
- a demodulation reference signal (demodulatin reference signal, DMRS) may be used for data demodulation.
- DMRS demodulatin reference signal
- the number of available DMRS patterns is related to the number of PSSCH symbols in the resource pool. For a specific number of PSSCH symbols (including the first AGC symbol) and PSCCH symbols, the available DMRS patterns and the position of each DMRS symbol in the patterns can be shown in Table 1.
- FIG. 10 shows an example of time-domain positions of 4 DMRS symbols when the number of PSSCHs is 13 symbols. As shown in FIG. 10 , the 4 DMRS symbols may be located at symbols 1, 4, 7 and 10.
- the specific time-domain DMRS pattern to be used may be selected by the terminal device sending data.
- the terminal device may indicate the adopted time-domain DMRS pattern in first-order sidelink control information (sidelink control information, SCI).
- sidelink control information SCI
- the terminal equipment can select a high-density DMRS pattern, so as to ensure the accuracy of channel estimation.
- the terminal equipment moves at a low speed, the terminal equipment can use a low-density DMRS pattern, thereby improving spectrum efficiency.
- the generation method of the PSSCH DMRS sequence is similar to the generation method of the PSCCH DMRS sequence.
- the initialization formula c init of the pseudo-random sequence c(m) of the PSSCH DMRS sequence includes N ID , and N ID can satisfy
- p i may be the i-th cyclic redundancy check (cyclic redundancy check, CRC) of the PSCCH scheduling the PSSCH
- L may be the number of bits of the PSCCH CRC
- two frequency-domain DMRS patterns can be supported in PDSCH and PUSCH, that is, DMRS frequency-domain type 1 and DMRS frequency-domain type 2.
- DMRS frequency-domain type 1 can support 4 DMRS ports
- Single symbol DMRS frequency domain type 2 can support 6 DMRS ports.
- double DMRS symbols the number of supported ports is doubled.
- sidelink communication systems such as NR-V2X
- Figure 11 is an example diagram of the PSSCH DMRS frequency domain position in the case of single symbol DMRS frequency domain type 1.
- the relevant technology does not propose a positioning method based on the side link, so it cannot support the use case of the positioning based on the side link, and thus cannot meet the positioning requirements based on the side link.
- FIG. 12 is a schematic flowchart of a communication method provided by an embodiment of the present application.
- the method shown in FIG. 12 may be executed by a terminal device.
- a terminal device may be a receiving terminal device or a transmitting terminal device.
- the method shown in FIG. 12 may include step S121.
- Step S121 the terminal device transmits the first PRS and the first control information on the sidelink.
- the terminal device may send the first PRS and the first control information to the receiving terminal device.
- the terminal device may receive the first PRS and the first control information sent by the transmitting terminal device.
- the first PRS may be used to determine the positioning information of the terminal device.
- the terminal device may determine the absolute positioning and/or relative positioning of the terminal device according to the received first PRS.
- Absolute positioning may include global positioning coordinates of the terminal device.
- the relative coordinates may include a distance and/or a direction of the terminal device relative to a first device in lateral communication with the terminal device.
- the relevant information of the first PRS may be uncertain (for example, not a preset value). For example, at least one item of information such as the sending position, the number of times of sending, and the sequence adopted by the first PRS may be uncertain.
- the present application proposes the first PRS indication, which is used to indicate the first PRS.
- the first control information may include one or more of the following information: the identifier of the first PRS, the resource location occupied by the first PRS, the number of repetitions of the first PRS, the sending period of the first PRS, and Information about the terminal device that sends the first PRS.
- the identifier of the first PRS may include identity information (identity, ID) of the first PRS.
- the resource position occupied by the first PRS may include a time domain resource position and/or a frequency domain resource position occupied by the first PRS.
- the information of the terminal device sending the first PRS may include the geographic location of the terminal device and/or the type of the terminal device, and the like.
- some or some information related to the first PRS may be indicated by the first control information, or may be predefined.
- the position and number of OFDM symbols occupied by the first PRS and/or resource elements (resource element, RE) occupied by each OFDM symbol may be predefined.
- the terminal device may transmit the first PRS according to the indication of the first control information, and the terminal device may implement sidelink-based positioning according to the first PRS. Therefore, based on the method provided in this application, the use case of positioning based on the side link can be supported, and the positioning requirement based on the side link can be met.
- the transmission resource of the first PRS may be the first resource, and the transmission resource of the first control information may be the second resource.
- the present application does not limit the resource pool to which the first resource or the second resource belongs.
- the resource pools may include a first resource pool and/or a second resource pool.
- the first resource pool may be used for sideline communications.
- the second resource pool can be different from the first resource pool.
- the second resource pool may be configured through different signaling from the first resource pool. It can be understood that the second resource pool may be a resource pool dedicated to PRS, that is, the terminal device sending the first PRS may assume that there is no side channel or signal sent by the terminal device in the second resource pool.
- Embodiment 1 Both the first resource and the second resource belong to the first resource pool
- the first resource pool may include a third resource.
- the first resource for transmitting the first PRS may be located within the time-frequency range of the third resource.
- the third resource may include the resource occupied by the PSSCH and/or the resource occupied by the DMRS of the PSSCH. That is to say, the first PRS can be sent together with the PSSCH used for sidelink communication.
- the sending resource of the first PRS may be located within the time-frequency range occupied by the PSSCH and/or the DMRS of the PSSCH.
- the resource occupied by the PSSCH and/or the time-frequency range of the resource occupied by the DMRS of the PSSCH may be determined according to the rules described above or the rules of related technologies (such as 3GPP Rel-16 standard).
- the first resource pool may include a fourth resource.
- the first resource used to transmit the first PRS may be located on the symbol where the fourth resource is located.
- the fourth resource may include resources occupied by PSFCH.
- the first resource may be located on the OFDM symbol where the PSFCH resource is located. It can be understood that channels and/or signals used for sidelink communication may exist in the first resource pool.
- the channel carrying the first control information may include PSSCH and/or PSCCH.
- the structure of the PSSCH and/or PSCCH carrying the first control information may be the same as or different from the structure defined in the related art.
- the first control information may be indicated by sidelink control information for scheduling the PSSCH.
- the side traffic control information may only be used to indicate the first control information, or may only be used to indicate the side traffic communication, or may be used to indicate both the first control information and the side traffic communication.
- the first control information indicated by the sideline control information may be included in the first-order SCI and/or the second-order SCI.
- the redundant bits in the PSCCH used to carry sideline control information may be used to indicate whether the first PRS exists in the PSSCH scheduled by the PSCCH.
- a new second-order SCI format may be defined to indicate whether the first PRS exists in the scheduled PSSCH and/or the transmission manner of the first PRS.
- the sending manner of the first PRS may include one or more items of the following information: the time-frequency position occupied by the first PRS, the repetition times of the first PRS, the sequence of the first PRS, and the like.
- the identity of the first PRS may be determined by the CRC of the PSCCH that schedules the PSSCH.
- the ID of the first PRS can be obtained by Sure, Can satisfy
- p i may be the i-th CRC of the PSCCH that schedules the PSSCH
- L may be the number of bits of the PSCCH CRC
- Embodiment 2 Both the first resource and the second resource belong to the second resource pool
- Both the first resource and the second resource belong to the second resource pool.
- the second resource may be no later than the first resource. That is to say, the first control information may be sent no later than the first PRS.
- the time slot where the second resource is located may be earlier than the time slot where the first resource is located.
- the first resource and the second resource may be in the same time slot.
- the first time slot in every P time slots may be used to indicate the first control information of the first PRS.
- the first time slot and/or subsequent time slots among the P time slots may be used to transmit the first PRS.
- P is an integer greater than 0.
- the first time slot and subsequent time slots may be continuous or discontinuous.
- the second resource of the first control information may be located in time slot n
- the first resource of the first PRS may be located in a time slot within the range of [n+T, n+T+P-1]
- T may be greater than or an integer equal to 0.
- T may represent the minimum gap between the second resource and the first resource, that is, the interval between the first time slot and subsequent time slots in every P time slots.
- the value of T may be defined by a standard, for example, T may be configured or preconfigured by a network device.
- the second resource is no later than the first resource, so that the terminal device receiving the first PRS can determine whether to receive the first PRS according to the indication of the first control information after receiving the first control information corresponding to the first PRS.
- a PRS or how to receive the first PRS for example, in time-frequency resource location, etc.).
- the second resource pool may include a first time slot, and the first time slot may be distinguished in frequency domain resources, and different frequency domain resources are used to transmit PRS and control information indicating the PRS respectively. That is to say, the first time slot may include resources used to transmit PRS (hereinafter referred to as PRS resources) and resources used to transmit control information indicating PRS (hereinafter referred to as control information resources), where the PRS resources and control information resources may be at different frequency domain locations. That is to say, the first time slot in the second resource pool can be used to indicate the PRS and control information. For example, the first time slot of every P time slots may be the first time slot.
- the resource used for transmitting the PRS may also be referred to as a PRS resource or a PRS transmission resource.
- the PRS resource may be the minimum granularity of resources occupied by the terminal device to send the PRS.
- a resource used to transmit control information indicating a PRS may be referred to as a control information resource.
- the control information resource may be the minimum granularity of resources occupied by the terminal device to send the control information used to indicate the PRS.
- the control information resources may be called PSCCH resources.
- FIG. 13 is a schematic diagram of a division method of a first time slot provided in an embodiment of the present application.
- the first time slot may include the first part and/or the second part in the frequency domain.
- the first part may be used to transmit one or more PRSs
- the second part may be used to transmit one or more control information for indicating PRSs.
- Both the first part and/or the second part may be located in OFDM symbols used for PRS transmission.
- the first part can be used to transmit the first PRS.
- the second part can be used to transmit the first control information.
- the terminal device may also transmit the second PRS and second control information, where the second control information may be used to indicate the second PRS.
- the first part may be used to transmit the first PRS and/or the second PRS.
- the second part may be used to transmit the first control information and/or the second control information.
- the PRBs occupied by the second part may be lower than the PRBs occupied by the first part.
- the lowest N PRBs in a time slot may be the second part, and the remaining PRBs may be the first part.
- the receiving end can receive PRBs starting from the lower bits. Based on this time slot structure, the first control information can be received before receiving the first PRS, so that the first PRS can be received according to the information indicated by the first control information.
- the first time slot may not be configured with resources for transmitting PRS.
- transmission resources of the first control information and/or transmission resources of the second control information may be configured in the first time slot, and transmission resources of the first PRS and transmission resources of the second PRS may not be configured in the first time slot.
- the first time slot in every P time slots may be the first time slot, and when P is greater than 1, the first time slot may not be configured for transmitting PRS (including the first PRS and the second PRS) resources.
- the frequency domain range of the second part may include multiple resources used for transmitting control information, and the resources used for transmitting control signals correspond to the resources used for transmitting PRS one by one.
- the transmission resource of the second PRS may be the third resource
- the transmission resource of the second control information may be the fourth resource.
- the third resource may be different from the first resource used for transmitting the first PRS
- the fourth resource may be different from the second resource used for transmitting the first control information.
- the first resource is uniquely mapped to the second resource
- the third resource is uniquely mapped to the fourth resource.
- the range of frequency domain resources used to transmit the control information indicating the PRS may include M control information resources, and the M control information resources may form a resource set.
- M control information resources may be used to indicate M PRSs respectively.
- M can be an integer greater than 0.
- it may be the number of PRS resources within the time slot [n+T, n+T+P-1].
- each control information resource can be mapped one-to-one with a PRS resource.
- the resource set may include M control information resources, and the indexes may be 0, 1, 2, .
- i may represent a PRS resource or an index of a resource used to transmit control information, 0 ⁇ i ⁇ M-1. If the terminal device sends the first control information on the i-th control information resource, the terminal device also sends the first PRS on the i-th PRS resource.
- FIG. 14 is an example diagram of M control information resources included in one time slot provided by the embodiment of the present application.
- the slot #0 may be the first slot of a certain 5 slots.
- Control information resources can be carried by PSCCH.
- the time slot #0 may include 4 resources for transmitting control information, namely PSCCH resource #0, PSCCH resource #1, PSCCH resource #2 and PSCCH resource #3.
- PRS resources corresponding to PSCCH resource #0, PSCCH resource #1, PSCCH resource #2 and PSCCH resource #3 are located in the second to fifth time slots.
- the second to fifth time slots are respectively configured with a resource for PRS transmission, namely PRS resource #0, PRS resource #1, PRS resource #2 and PRS resource #3.
- PSCCH resource #0, PSCCH resource #1, PSCCH resource #2, and PSCCH resource #3 are in one-to-one correspondence with PRS resource #0, PRS resource #1, PRS resource #2, and PRS resource #3.
- multiple resources for transmitting PRSs may be included in the same time slot. Indexes of multiple PRS resources may be continuous, that is, multiple physical resources for transmitting PRS are continuous.
- the terminal device may transmit the control information indicating the PRS on the resources corresponding to the multiple PRSs for transmitting the control information indicating the PRS.
- the terminal device may send control information on one resource, and indicate multiple occupied PRS resources through a specific information field on the resource. This reduces the peak to average power ratio (PAPR).
- PAPR peak to average power ratio
- Both the first resource and the second resource belong to the second resource pool.
- the first resource and the second resource may occupy the same time domain resource.
- both the first resource and the second resource may belong to the second time slot.
- the first resource and the second resource may respectively occupy different frequency domain resources of the second time slot.
- the OFDM symbols occupied by the first resource may be different from the OFDM symbols occupied by the second resource.
- the same time-domain resource occupied by the first resource and the second resource may be called a PRS and a control resource.
- PRS and control resources can consist of multiple parts.
- the plurality of sections may include a first section and a second section. The first part may be used for transmission of control information indicating the PRS, and the second part may be used for transmission of the PRS.
- the OFDM symbols occupied by the first resource there may be one or more OFDM symbols occupied by the first resource, and one or more OFDM symbols occupied by the second resource may also be used.
- the OFDM symbols occupied by the first resource may be partly different from the OFDM symbols occupied by the second resource.
- the OFDM symbols occupied by the first resource may include symbol #1
- the OFDM symbols occupied by the second resource may include symbol #1, symbol #2, and symbol #3.
- the OFDM symbols occupied by the first resource and the OFDM symbols occupied by the second resource may be completely different.
- the OFDM symbols occupied by the first resource may include symbol #1
- the OFDM symbols occupied by the second resource may include symbol #2, symbol #3, and symbol 4#.
- One PRS and control resource may include at least 3 OFDM symbols.
- the first OFDM symbol can be used for AGC adjustment.
- Part or all of the resources in the second OFDM symbol can be used to transmit PRS control information.
- Some resources of the second OFDM symbol and resources after the second OFDM symbol can be used to transmit the PRS.
- the second resource may occupy some or all of the resources in the second symbol.
- the first resource may occupy resources after the second symbol. In the case where the second resource occupies part of the resource in the second symbol, the first resource may also occupy part of the resource in the second symbol.
- the first control information can occupy part of the resource starting from the first PRB of the symbol, and the remaining part of the resource can be used for the transmission of the first PRS. That is to say, starting from the first PRB, the terminal device at the transmitting end can map the modulation symbols of the PSCCH carrying the first control information in the frequency domain first and then the time domain, and then can transmit the first PRB on the remaining resources. PRS.
- the OFDM symbols occupied by the first resource and the OFDM symbols occupied by the second resource are illustrated by way of the embodiments shown in FIG. 15 and FIG. 16 .
- FIG. 15 is an example diagram of a resource division method provided by the embodiment of the present application.
- one PRS and control resource can occupy 4 OFDM symbols.
- Symbol #0 can be used for AGC.
- Symbol #1 can be used to transmit the first control information, and symbol #2 and symbol #3 can be used to transmit the first PRS.
- FIG. 16 is an example diagram of another resource division provided by the embodiment of the present application.
- the first resource and the second resource may occupy 4 OFDM symbols.
- Symbol #0 can be used for AGC.
- Part of the PRBs of symbol #1 may be used to transmit the first control information, and the remaining PRBs of symbol #1 may be used to transmit the first PRS.
- Symbol #2 and symbol #3 may be used to transmit the first PRS.
- the DMRS of the PSCCH carrying the first control information can be used to calculate the positioning information.
- the second time slot may include one or more PRSs and control resources.
- the second time slot may also include resources for the second PRS transmission and resources for the second control information transmission.
- Embodiment 3 the first resource belongs to the second resource pool, and the second resource belongs to the first resource pool
- the first resource used to transmit the first PRS may belong to the second resource pool.
- the second resource used for transmitting the first control information may belong to the first resource pool.
- the first control information may be indicated by the PSSCH/PSCCH sent in the first resource pool used for sidelink communication.
- the first resource pool for sidelink communication may be associated with one or more resource pools for transmitting PRS.
- the PSCCH/PSSCH sent in the first resource pool may explicitly and/or implicitly indicate the transmission of the PRS in a resource pool associated with it for transmitting the PRS.
- the first resource pool and the second resource pool may include the same time slot.
- the first H OFDM symbols may belong to the second resource pool, and the remaining OFDM symbols may belong to the first resource pool.
- H may be an integer greater than 0.
- FIG. 17 is a schematic structural diagram of a time slot provided by an embodiment of the present application.
- the slot shown in FIG. 17 may include 13 OFDM symbols.
- the first 3 OFDM symbols (symbols 0, 1 and 2) may belong to the second resource pool for transmission of PRS.
- the last 10 OFDM symbols (symbols 3-13) may belong to the first resource pool for sidelink communication and to indicate PRS.
- the first resource and the second resource may be located in different time slots.
- the first resource may be located in time slot m
- the second resource may be located in time slot n.
- m and n can be integers greater than 0.
- There may be a gap between slot m and slot n.
- the interval may be indicated by information carried in PSCCH/PSSCH.
- the interval may not be less than a specific value, and the specific value may be, for example, the number of the first time slot belonging to the second resource pool.
- the first PRS may be sent in a specific period, or may be sent multiple times in each period.
- the sending period of the first PRS and/or the number of times of sending in each period may be indicated by information carried in the PSCCH/PSSCH.
- the sending period of the first PRS may be directly or indirectly determined by the sending period of the PSCCH indicated in the PSCCH.
- the sending period of the first PRS may be the same as the sending period of the PSCCH indicated in the PSCCH.
- the number of times the first PRS is sent in each period may be determined by. The number of repetitions of the PSCCH indicated in the PSCCH is directly or indirectly determined.
- FIG. 18 is a schematic structural diagram of a terminal device 1800 provided in an embodiment of the present application.
- the terminal device 1800 may include a first transmission unit 1810 .
- the first transmission unit 1810 may be configured to transmit a first positioning reference signal PRS and first control information on a sidelink, where the first control information is used to indicate the first PRS.
- the transmission resource of the first PRS is a first resource
- the transmission resource of the first control information is a second resource
- both the first resource and the second resource belong to a first resource pool, so The first resource pool is used for side communication.
- the first resource pool includes a third resource
- the third resource includes a resource occupied by a physical sidelink shared channel PSSCH and/or a resource occupied by a demodulation reference signal DMRS of the PSSCH, and the first The resource is located within the range of the third resource.
- the first resource pool includes a fourth resource, where the fourth resource includes a resource occupied by a physical sidelink feedback channel PSFCH, and the first resource is located on a symbol where the fourth resource is located.
- the first control information is included in first-order sidelink control information SCI and/or second-order SCI.
- the first resource pool includes resources occupied by a physical sidelink control channel PSCCH that schedules the PSSCH, and the identifier of the first PRS is determined by a cyclic redundancy check (CRC) of the PSCCH that schedules the PSSCH.
- CRC cyclic redundancy check
- the transmission resource of the first PRS is a first resource
- the first resource belongs to a second resource pool
- the second resource pool is different from the first resource pool used for sidelink communication through different signaling configuration.
- the transmission resource of the first control information is a second resource, and the second resource belongs to the second resource pool.
- the second resource is no later than the first resource.
- the terminal device may further include a second transmission unit.
- the second transmission unit is used to transmit a second PRS and second control information; wherein, the second PRS is indicated by the second control information, the second resource pool includes a first time slot, and the first time slot Including a first part and/or a second part in the frequency domain, the first part is used to transmit the first PRS and/or the second PRS, and the second part is used to transmit the first control information And/or the second control information.
- the PRBs occupied by the second part are lower than the PRBs occupied by the first part.
- the second resource pool includes a second time slot, both the first resource and the second resource belong to the second time slot, and the OFDM symbols occupied by the first resource and the second OFDM symbols occupied by resources are different.
- the transmission resource of the first control information is a second resource, and the second resource belongs to the first resource pool.
- the first resource pool includes resources occupied by the PSCCH that schedules the PSSCH
- the first control information includes the number of repetitions of the first PRS, and the number of repetitions of the first PRS is determined by the PSCCH indicating the PSSCH The number of repetitions is determined.
- the first resource pool includes resources occupied by the PSCCH that schedules the PSSCH
- the first control information includes the sending period of the first PRS
- the sending period of the first PRS is determined by the PSCCH indicating the PSSCH The sending cycle is determined.
- the first control information includes one or more of the following information: the identifier of the first PRS, the resource location occupied by the first PRS, the number of repetitions of the first PRS, the The sending period of the first PRS, and the information of the terminal equipment sending the first PRS.
- the terminal device may further include a first determination unit.
- the first determining unit may be configured to determine the global positioning coordinates of the terminal device according to the first PRS.
- the terminal device performs lateral communication with the first device, and the terminal device may further include a second determination unit.
- the second determining unit may be configured to determine the distance and/or direction of the terminal device relative to the first device according to the first PRS.
- FIG. 19 is a schematic structural diagram of a communication device according to an embodiment of the present application.
- the dashed line in Figure 19 indicates that the unit or module is optional.
- the apparatus 1900 may be used to implement the methods described in the foregoing method embodiments.
- Apparatus 1900 may be a chip, a terminal device or a network device.
- Apparatus 1900 may include one or more processors 1910 .
- the processor 1910 can support the device 1900 to implement the methods described in the foregoing method embodiments.
- the processor 1910 may be a general purpose processor or a special purpose processor.
- the processor may be a central processing unit (central processing unit, CPU).
- the processor can also be other general-purpose processors, digital signal processors (digital signal processors, DSPs), application specific integrated circuits (application specific integrated circuits, ASICs), off-the-shelf programmable gate arrays (field programmable gate arrays, FPGAs) Or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc.
- a general-purpose processor may be a microprocessor, or the processor may be any conventional processor, or the like.
- Apparatus 1900 may also include one or more memories 1920 .
- a program is stored in the memory 1920, and the program can be executed by the processor 1910, so that the processor 1910 executes the methods described in the foregoing method embodiments.
- the memory 1920 can be independent from the processor 1910 or can be integrated in the processor 1910 .
- Apparatus 1900 may also include a transceiver 1930 .
- Processor 1910 may communicate with other devices or chips through transceiver 1930.
- the processor 1910 may send and receive data with other devices or chips through the transceiver 1930 .
- the embodiment of the present application also provides a computer-readable storage medium for storing programs.
- the computer-readable storage medium can be applied to the terminal or the network device provided in the embodiments of the present application, and the program enables the computer to execute the methods performed by the terminal or the network device in the various embodiments of the present application.
- the embodiment of the present application also provides a computer program product.
- the computer program product includes programs.
- the computer program product can be applied to the terminal or the network device provided in the embodiments of the present application, and the program enables the computer to execute the methods performed by the terminal or the network device in the various embodiments of the present application.
- the embodiment of the present application also provides a computer program.
- the computer program can be applied to the terminal or the network device provided in the embodiments of the present application, and the computer program enables the computer to execute the methods performed by the terminal or the network device in the various embodiments of the present application.
- the "indication" mentioned may be a direct indication, may also be an indirect indication, and may also mean that there is an association relationship.
- a indicates B which can mean that A directly indicates B, for example, B can be obtained through A; it can also indicate that A indirectly indicates B, for example, A indicates C, and B can be obtained through C; it can also indicate that there is an association between A and B relation.
- B corresponding to A means that B is associated with A, and B can be determined according to A.
- determining B according to A does not mean determining B only according to A, and B may also be determined according to A and/or other information.
- the term "corresponding" may indicate that there is a direct or indirect correspondence between the two, or that there is an association between the two, or that it indicates and is instructed, configures and is configured, etc. relation.
- predefined or “preconfigured” can be realized 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).
- the application does not limit its specific implementation.
- pre-defined may refer to defined in the protocol.
- the "protocol” may refer to a standard protocol in the communication field, for example, may include the LTE protocol, the NR protocol, and related protocols applied to future communication systems, which is not limited in the present application.
- sequence numbers of the above-mentioned processes do not mean the order of execution, and the execution order of each process should be determined by its functions and internal logic, rather than the implementation process of the embodiments of the present application. constitute any limitation.
- the disclosed systems, devices and methods may be implemented in other ways.
- the device embodiments described above are only illustrative.
- the division of the units is only a logical function division. In actual implementation, there may be other division methods.
- multiple units or components can be combined or May be integrated into another system, or some features may be ignored, or not implemented.
- the mutual coupling or direct coupling or communication connection shown or discussed may be through some interfaces, and the indirect coupling or communication connection of devices or units may be in electrical, mechanical or other forms.
- the units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place, or may be distributed to multiple network units. Part or all of the units can be selected according to actual needs to achieve the purpose of the solution of this embodiment.
- each functional unit in each embodiment of the present application may be integrated into one processing unit, each unit may exist separately physically, or two or more units may be integrated into one unit.
- all or part of them may be implemented by software, hardware, firmware or any combination thereof.
- software When implemented using software, it may be implemented in whole or in part in the form of a computer program product.
- the computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on the computer, the processes or functions according to the embodiments of the present application will be generated in whole or in part.
- the computer can be a general purpose computer, a special purpose computer, a computer network, or other programmable devices.
- the computer instructions may be stored in or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website, computer, server or data center Transmission to another website site, computer, server or data center by wired (such as coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (such as infrared, wireless, microwave, etc.).
- the computer-readable storage medium may be any available medium that can be read by a computer, or a data storage device such as a server or a data center integrated with one or more available media.
- the available medium may be a magnetic medium (for example, a floppy disk, a hard disk, a magnetic tape), an optical medium (for example, a digital versatile disc (digital video disc, DVD)) or a semiconductor medium (for example, a solid state disk (solid state disk, SSD) )wait.
- a magnetic medium for example, a floppy disk, a hard disk, a magnetic tape
- an optical medium for example, a digital versatile disc (digital video disc, DVD)
- a semiconductor medium for example, a solid state disk (solid state disk, SSD)
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Abstract
本申请提供了一种通信方法和终端设备。所述通信方法包括:终端设备在侧行链路上传输第一定位参考信号PRS和第一控制信息,所述第一控制信息用于指示所述第一PRS。终端设备可以根据第一控制信息的指示传输第一PRS,并且终端设备可以根据第一PRS实现基于侧行链路的定位。因此,基于本申请提供的方法,可以支持基于侧行链路的定位的用例,满足基于侧行链路的定位需求。
Description
本申请涉及通信技术领域,并且更为具体地,涉及一种通信方法和终端设备。
终端设备之间可以通过侧行链路(sidelink,SL)进行侧行通信。相关技术未提出基于侧行链路的定位方法,从而无法支持基于侧行链路的定位的用例,进而无法满足基于侧行链路的定位需求。
发明内容
本申请提供一种通信方法和终端设备,以支持基于侧行链路的定位。
第一方面,提供了一种通信方法,所述通信方法包括:终端设备在侧行链路上传输第一定位参考信号PRS和第一控制信息,所述第一控制信息用于指示所述第一PRS。
第二方法,提供了一种终端设备,所述终端设备包括:第一传输单元,用于在侧行链路上传输第一定位参考信号PRS和第一控制信息,所述第一控制信息用于指示所述第一PRS。
第三方面,提供一种终端设备,包括处理器、存储器、通信接口,所述存储器用于存储一个或多个计算机程序,所述处理器用于调用所述存储器中的计算机程序使得所述终端设备执行第一方面所述的方法。
第四方面,本申请实施例提供了一种通信***,该***包括上述的终端设备。在另一种可能的设计中,该***还可以包括本申请实施例提供的方案中与该终端设备进行交互的其他设备。
第五方面,本申请实施例提供了一种计算机可读存储介质,所述计算机可读存储介质存储有计算机程序,所述计算机程序使得终端设备执行上述第一方面的方法中的部分或全部步骤。
第六方面,本申请实施例提供了一种计算机程序产品,其中,所述计算机程序产品包括存储了计算机程序的非瞬时性计算机可读存储介质,所述计算机程序可操作来使终端执行上述第一方面的方法中的部分或全部步骤。在一些实现方式中,该计算机程序产品可以为一个软件安装包。
第七方面,本申请实施例提供了一种芯片,该芯片包括存储器和处理器,处理器可以从存储器中调用并运行计算机程序,以实现上述第一方面的方法中所描述的部分或全部步骤。
第八方面,提供一种计算机程序产品,包括程序,所述程序使得计算机执行第一方面所述的方法。
第九方面,提供一种计算机程序,所述计算机程序使得计算机执行第一方面所述的方法。
终端设备可以根据第一控制信息的指示传输第一PRS,并且终端设备可以根据第一PRS实现基于侧行链路的定位。因此,基于本申请提供的方法,可以支持基于侧行链路的定位的用例,满足基于侧行链路的定位需求。
图1为可应用本申请实施例的无线通信***的***架构示例图。
图2为网络覆盖内的侧行通信的场景示例图。
图3为部分网络覆盖的侧行通信的场景示例图。
图4为网络覆盖外的侧行通信的场景示例图。
图5为基于广播的侧行通信方式的示例图。
图6为基于单播的侧行通信方式的示例图。
图7为基于组播的侧行通信方式的示例图。
图8为一种用于侧行通信的时隙的示例图。
图9为另一种用于侧行通信的时隙的示例图。
图10为再一种用于侧行通信的时隙的示例图。
图11为一种PSSCH DMRS频域位置示例图。
图12本申请实施例提供的一种通信方法流程性示意图。
图13为本申请实施例提供的一种第一时隙的划分方式示意图。
图14为本申请实施例提供的一种资源的划分方式示意图。
图15为本申请实施例提供的另一种资源的划分方式示意图。
图16为本申请实施例提供的再一种资源的划分方式示意图。
图17为本申请实施例提供的又一种资源的划分方式示意图。
图18为本申请实施例提供的一种终端设备的结构示意图。
图19为本申请实施例提供的另一种终端设备的结构示意图。
下面将结合附图,对本申请中的技术方案进行描述。
通信***
图1是本申请实施例应用的无线通信***100。该无线通信***100可以包括网络设备110和终端设备120。网络设备110可以是与终端设备120通信的设备。网络设备110可以为特定的地理区域提供通信覆盖,并且可以与位于该覆盖区域内的终端设备120进行通信。
可选地,无线通信***100可以包括多个网络设备并且每个网络设备的覆盖范围内可以包括其它数量的终端设备,本申请实施例对此不做限定。
可选地,无线通信***100还可以包括网络控制器、移动管理实体等其他网络实体,本申请实施例对此不作限定。
应理解,本申请实施例的技术方案可以应用于各种通信***,例如:第五代(5th generation,5G)***或新无线(new radio,NR)、长期演进(long term evolution,LTE)***、LTE频分双工(frequency division duplex,FDD)***、LTE时分双工(time division duplex,TDD)等。本申请提供的技术方案还可以应用于未来的通信***,如第六代移动通信***,又如卫星通信***,等等。
本申请实施例中的终端设备也可以称为用户设备(user equipment,UE)、接入终端、用户单元、用户站、移动站、移动台(mobile station,MS)、移动终端(mobile terminal,MT)、远方站、远程终端、移动设备、用户终端、终端、无线通信设备、用户代理或用户装置。本申请实施例中的终端设备可以是指向用户提供语音和/或数据连通性的设备,可以用于连接人、物和机,例如具有无线连接功能的手持式设备、车载设备等。本申请的实施例中的终端设备可以是手机(mobile phone)、平板电脑(Pad)、笔记本电脑、掌上电脑、移动互联网设备(mobile internet device,MID)、可穿戴设备,虚拟现实(virtual reality,VR)设备、增强现实(augmented reality,AR)设备、工业控制(industrial control)中的无线终端、无人驾驶(self driving)中的无线终端、远程手术(remote medical surgery)中的无线终端、智能电网(smart grid)中的无线终端、运输安全(transportation safety)中的无线终端、智慧城市(smart city)中的无线终端、智慧家庭(smart home)中的无线终端等。可选地,终端设备可以用于充当基站。例如,终端设备可以充当调度实体,其在车辆外联(vehicle-to-everything,V2X)或设备到设备通信(device-to-device,D2D)等中的终端设备之间提供侧行链路信号。比如,蜂窝电话和汽车利用侧行链路信号彼此通信。蜂窝电话和智能家居设备之间通信,而无需通过基站中继通信信号。可选地,终端设备可以用于充当基站。
本申请实施例中的网络设备可以是用于与终端设备通信的设备,该网络设备也可以称为接入网设备或无线接入网设备,如网络设备可以是基站。本申请实施例中的网络设备可以是指将终端设备接入到无线网络的无线接入网(radio access network,RAN)节点(或设备)。基站可以广义的覆盖如下中的各种名称,或与如下名称进行替换,比如:节点B(NodeB)、演进型基站(evolved NodeB,eNB)、下一代基站(next generation NodeB,gNB)、中继站、接入点、传输点(transmitting and receiving point,TRP)、发射点(transmitting point,TP)、主站MeNB、辅站SeNB、多制式无线(MSR)节点、家庭基站、网络控制器、接入节点、无线节点、接入点(access point,AP)、传输节点、收发节点、基带单元(base band unit,BBU)、射频拉远单元(Remote Radio Unit,RRU)、有源天线单元(active antenna unit,AAU)、射频头(remote radio head,RRH)、中心单元(central unit,CU)、分布式单元(distributed unit,DU)、定位节点等。基站可以是宏基站、微基站、中继节点、施主节点或类似物,或其组合。基站还可以指用于设置于前述设备或装置内的通信模块、调制解调器或芯片。基站还可以是移动交换中心以及设备到设备(device to device,D2D)、车辆到车辆(vehicle to vehicle,V2V)、车辆外联(vehicle-to-everything,V2X)、机器到机器(machine-to-machine,M2M)通信中承担基站功能的设备、6G网络中的网络侧设备、未来的通信***中承担基站功能的设备等。基站可以支持相同或不同接入技术的网络。本申请的实施例对网络设备所采用的具体技术和具体设备形态不做限定。
基站可以是固定的,也可以是移动的。例如,直升机或无人机可以被配置成充当移动基站,一个或多个小区可以根据该移动基站的位置移动。在其他示例中,直升机或无人机可以被配置成用作与另一基站通信的设备。
在一些部署中,本申请实施例中的网络设备可以是指CU或者DU,或者,网络设备包括CU和DU。gNB还可以包括AAU。
网络设备和终端设备可以部署在陆地上,包括室内或室外、手持或车载;也可以部署在水面上;还可以部署在空中的飞机、气球和卫星上。本申请实施例中对网络设备和终端设备所处的场景不做限定。
应理解,本申请中的通信设备的全部或部分功能也可以通过在硬件上运行的软件功能来实现,或者通过平台(例如云平台)上实例化的虚拟化功能来实现。
不同网络覆盖情况下的侧行通信
侧行通信指的是基于侧行链路的通信技术。侧行通信例如可以是D2D或V2X。侧行通信支持在终端设备与终端设备之间直接进行通信数据传输。终端设备与终端设备直接进行通信数据的传输可以具有更高的频谱效率以及更低的传输时延。例如,车联网***采用侧行通信技术。
在侧行通信中,根据终端设备所处的网络覆盖的情况,可以将侧行通信分为网络覆盖内的侧行通信,部分网络覆盖的侧行通信,及网络覆盖外的侧行通信。
图2为网络覆盖内的侧行通信的场景示例图。在图2所示的场景中,两个终端设备120a均处于网络设备110的覆盖范围内。因此,两个终端设备120a均可以接收网络设备110的配置信令(本申请中的配置信令也可替换为配置信息),并根据网络设备110的配置信令确定侧行配置。在两个终端设备120a均进行侧行配置之后,即可在侧行链路上进行侧行通信。
图3为部分网络覆盖的侧行通信的场景示例图。在图3所示的场景中,终端设备120a与终端设备120b进行侧行通信。终端设备120a位于网络设备110的覆盖范围内,因此终端设备120a能够接收到网络设备110的配置信令,并根据网络设备110的配置信令确定侧行配置。终端设备120b位于网络覆盖范围外,无法接收网络设备110的配置信令。在这种情况下,终端设备120b可以根据预配置(pre-configuration)信息和/或位于网络覆盖范围内的终端设备120a发送的物理侧行广播信道(physical sidelink broadcast channel,PSBCH)中携带的信息确定侧行配置。在终端设备120a和终端设备120b均进行侧行配置之后,即可在侧行链路上进行侧行通信。
图4为网络覆盖外的侧行通信的场景示例图。在图4所示的场景中,两个终端设备120b均位于网络覆盖范围外。在这种情况下,两个终端设备120b均可以根据预配置信息确定侧行配置。在两个终端设备120b均进行侧行配置之后,即可在侧行链路上进行侧行通信。
侧行通信的模式
某些标准或协议(如第三代合作伙伴计划(3rd Generation Partnership Project,3GPP))定义了两种侧行通信的模式(或称传输模式):第一模式和第二模式。
在第一模式下,终端设备的资源(本申请提及的资源也可称为传输资源,如时频资源)是由网络设备分配的。终端设备可以根据网络设备分配的资源在侧行链路上进行数据的发送。网络设备可以为终端设备分配单次传输的资源,也可以为终端设备分配半静态传输的资源。该第一模式可以应用于有网络设备覆盖的场景,如前文图2所示的场景。在图2所示的场景中,终端设备120a位于网络设备110的网络覆盖范围内,因此网络设备110可以为终端设备120a分配侧行传输过程中使用的资源。
在第二模式下,终端设备可以自主在资源池(resource pool,RP)中选取一个或多个资源。然后,终端设备可以根据选择出的资源进行侧行传输。例如,在图4所示的场景中,终端设备120b位于小区覆盖范围外。因此,终端设备120b可以在预配置的资源池中自主选取资源进行侧行传输。或者,在图2所示的场景中,终端设备120a也可以在网络设备110配置的资源池中自主选取一个或多个资源进行侧行传输。
在第二模式下,用于侧行通信的资源选择可以包括步骤S110和步骤S120。
步骤S110,终端设备将资源选择窗内所有的可用资源作为资源集合A。终端设备可以对资源集合A中的资源进行排除,并将排除后的剩余资源作为候选资源集合。
作为一种实现方式,如果终端设备在侦听窗内某些时隙发送数据,没有进行侦听,则这些时隙在选择窗内对应的时隙上的全部资源可以被排除掉。其中,终端设备可以利用所用资源池配置中的资源保留时间(resource reservation period)域的取值集合确定选择窗内对应的时隙。
作为另一种实现方式,终端设备可以根据测量的参考信号接收功率(reference signal receiving power,RSPR)确定从资源集合A中排除的资源。例如,如果终端设备在侦听窗内侦听到物理侧行控制信道(physical sidelink control channel,PSCCH),终端设备可以测量该PSCCH的RSRP和/或该PSCCH调度的PSSCH的RSRP。如果测量的RSRP大于侧行链路参考信号接收功率(SL-RSRP)阈值,并且根据该PSCCH中传输的侧行控制信息中的资源预留信息确定其预留的资源在资源选择窗内,则终端设备可以从集合A中排除对应资源。如果资源集合A中剩余资源少于或等于资源集合A进行资源排除前全部资源的X%,则可以将SL-RSRP阈值抬升3dB,并且终端设备重新执行步骤S110。其中,X可以为取值集合中的任意一个,取值集合例如可以为{20,35,50}。终端设备可以根据待发送数据的优先级从取值集合中确定参数X。需要说明的是,SL-RSRP阈值可以与终端设备侦听到的PSCCH中携带的优先级有 关。SL-RSRP阈值也可以与终端设备待发送数据的优先级有关。
步骤S120,终端设备可以从候选资源集合中选择若干资源,这些资源可以作为进行侧行通信的初次传输和/或重传的发送资源。
侧行通信的数据传输方式
某些侧行通信***(如LTE-V2X)支持基于广播的数据传输方式(下文简称广播传输)。对于广播传输,接收端终端设备可以为发送端终端设备周围的任意一个终端设备。以图5为例,终端设备1是发送端终端设备,该发送端终端设备对应的接收端终端设备是终端设备1周围的任意一个终端设备,例如可以是图5中的终端设备2-终端设备6。
除了广播传输之外,某些通信***还支持基于单播的数据传输方式(下文简称单播传输)和/或基于组播的数据传输方式(下文简称组播传输)。例如,NR-V2X希望支持自动驾驶。自动驾驶对车辆之间的数据交互提出了更高的要求。例如,车辆之间的数据交互需要更高的吞吐量、更低的时延、更高的可靠性、更大的覆盖范围、更灵活的资源分配方式等。因此,为了提升车辆之间的数据交互性能,NR-V2X引入了单播传输和组播传输。
对于单播传输,接收端终端设备一般只有一个终端设备。以图6为例,终端设备1和终端设备2之间进行的是单播传输。终端设备1可以为发送端终端设备,终端设备2可以为接收端终端设备,或者终端设备1可以为接收端终端设备,终端设备2可以为发送端终端设备。
对于组播传输,接收端终端设备可以是一个通信组(group)内的终端设备,或者,接收端终端设备可以是在一定传输距离内的终端设备。以图7为例,终端设备1、终端设备2、终端设备3和终端设备4构成一个通信组。如果终端设备1发送数据,则该组内的其他终端设备(终端设备2至终端设备4)均可以是接收端终端设备。
侧行通信的资源分配
在某些通信***(例如NR-V2X)中,时域资源的分配可以以时隙为分配粒度。一个时隙中用于侧行传输的时域符号(可以简称为符号)的起点和长度可以通过参数侧行链路起始符号(sl-startSLsymbols)和侧行链路符号长度(sl-lengthSLsymbols)分别配置。时域符号例如可以为正交频分复用(orthogonal frequency division multiplexing,OFDM)符号。物理侧行共享信道(physical sidelink shared channel,PSSCH)可以和与其关联的PSCCH在相同的时隙中传输。PSCCH可以占据2个或3个时域符号。一个时隙中的最后一个符号可以用作保护间隔(guard period,GP)。PSSCH和PSCCH可以使用除用于GP以外的其余时域符号。在一些实施例中,用于侧行通信的时隙也可以称为侧行时隙。
需要说明的是,一个时隙中还可以存在用于物理侧行反馈信道(physical sidelink feedback channel,PSFCH)传输的资源。如果一个时隙中配置了PSFCH传输资源,PSSCH和PSCCH不能占用用于PSFCH传输的时域符号,以及该符号之前的自动增益控制(automatic gain control,AGC)和GP符号。
图8为一种用于侧行通信的时隙的示例图。由图8可以看出,网络设备配置的sl-StartSymbol=3,sl-LengthSymbols=11,即一个时隙中从符号索引3开始的11个时域符号可用于侧行传输。图7所示的时隙中有PSFCH的传输资源,该PSFCH的传输资源占据符号11和符号12。其中,符号11可以作为PSFCH的AGC符号。符号10和符号13可以分别用作GP。符号3至符号9可以为用于PSSCH传输的时域符号。用于PSCCH传输的时域符号可以占据3个符号,即符号3、4以及5。符号3可以用作AGC符号。
图9为另一种用于侧行通信的时隙的示例图。图9所示的时隙内,第一个符号可以固定用于AGC。在AGC符号上,终端设备可以复制第二个符号上发送的信息。时隙的最后可以留有一个符号用于收发转换,即终端设备可以利用该符号实现发送状态和接收状态的转换。在剩余的符号中,PSCCH可以占用从第二个侧行符号开始的两个或三个符号。在频域上,PSCCH占据的物理资源块(physical resource block,PRB)个数在一个PSSCH的子带范围内。如果PSCCH占用的PRB个数小于PSSCH的一个子信道的大小,或者,PSSCH的频域资源包括多个子信道,则在PSCCH所在的符号上,PSCCH可以和PSSCH频分复用。
解调参考信号(demodulatin reference signal,DMRS)可以用于数据解调。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符号的位置可以如表1所示。
表1
图10示出了PSSCH为13个符号数时4个DMRS符号的时域位置的例子。如图10所示,4个DMRS的符号可以位于符号1、4、7以及10。
如果用于侧行通信资源池内配置了多个时域DMRS图案,具体采用的时域DMRS图案可以由发送数据的终端设备选择。终端设备可以在第一阶侧行链路控制信息(sidelink control information,SCI)中指示采用的时域DMRS图案。在终端设备高速运动的情况下,终端设备可以选择高密度的DMRS图案,从而保证信道估计的精度。在终端设备低速运动的情况下,终端设备可以采用低密度的DMRS图案,从而提高频谱效率。
PSSCH DMRS序列的生成方式和PSCCH DMRS序列的生成方式类似。PSSCH DMRS序列的伪随机序列c(m)的初始化公式c
init中包括N
ID,N
ID可以满足
其中,p
i可以为调度该PSSCH的PSCCH的第i位循环冗余校验(cyclic redundancy check,CRC),L可以为PSCCH CRC的比特位数,L的值可以为L=24。
在某些通信***(例如NR***)中,PDSCH和PUSCH中可以支持两种频域DMRS图案,即DMRS频域类型1和DMRS频域类型2。对于每一种频域类型,均可以存在单DMRS符号和双DMRS符号两种不同类型。单符号DMRS频域类型1可以支持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。在某些侧行通信***(例如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。图11为单符号的DMRS频域类型1情况下PSSCH DMRS频域位置示例图。
基于侧行链路的定位
随着技术的发展,相关技术提出了基于侧行链路的定位用例。例如,在3GPP R-17中,3GPP RAN对“NR定位增强”和“覆盖内、部分覆盖和覆盖外NR定位用例的场景和要求”进行了研究。其中,“覆盖内、部分覆盖和覆盖外NR定位用例的场景和要求”研究集中于V2X和公共安全用例,研究结果记录在TR38.845中。另外,SA1在TS22.261中制定了“基于测距的服务”的要求,并在TS22.104中针对覆盖范围外场景中的工业互联网(industrial internet of things,IIoT)使用情况制定了定位精度要求。
相关技术未提出基于侧行链路的定位方法,从而无法支持基于侧行链路的定位的用例,进而无法满足基于侧行链路的定位需求。
针对上述问题,本申请提出了一种通信方法。图12为本申请实施例提供的通信方法流程性示意图。图12所示的方法可以由终端设备执行。终端设备可以接收端终端设备或发送端终端设备。图12所示的方法可以包括步骤S121。
步骤S121,终端设备在侧行链路上传输第一PRS和第一控制信息。以终端设备为发送端终端设备为例,终端设备可以向接收端终端设备发送第一PRS和第一控制信息。或者,以终端设备为接收端终端设备为例,终端设备可以接收发送端终端设备发送的第一PRS和第一控制信息。
第一PRS可以用于确定终端设备的定位信息。例如,终端设备可以根据接收到的第一PRS确定终端设备的绝对定位和/或相对定位。绝对定位可以包括终端设备的全球定位坐标。相对坐标可以包括终端设备相对于与终端设备进行侧行通信的第一设备的距离和/或方向。
第一PRS的相关信息可以是不确定的(例如不是预设值)。例如,第一PRS的发送位置、发送次数以及第一PRS采用的序列等信息中的至少一项可以是不确定的。本申请提出第一PRS指示,以用于 指示第一PRS。
作为一种实现方式,第一控制信息可以包括以下信息中的一项或多项:第一PRS的标识、第一PRS占用的资源位置、第一PRS的重复次数、第一PRS的发送周期以及发送第一PRS的终端设备的信息。
第一PRS的标识可以包括第一PRS的身份信息(identity,ID)。第一PRS占用的资源位置可以包括第一PRS占用的时域资源位置和/或频域资源位置。发送第一PRS的终端设备的信息可以包括终端设备的地理位置和/或终端设备的类型等。
可以理解的是,某个或者某些与第一PRS相关的信息可以通过第一控制信息指示,也可以是预定义的。例如,第一PRS占用的OFDM符号的位置和个数和/或每个OFDM符号上占用的资源元素(resource element,RE)可以是预定义的。
终端设备可以根据第一控制信息的指示传输第一PRS,并且终端设备可以根据第一PRS实现基于侧行链路的定位。因此,基于本申请提供的方法,可以支持基于侧行链路的定位的用例,满足基于侧行链路的定位需求。
第一PRS的传输资源可以为第一资源,第一控制信息的传输资源可以为第二资源。本申请不限制第一资源或第二资源所属的资源池。资源池可以包括第一资源池和/或第二资源池。第一资源池可以用于侧行通信。第二资源池可以与第一资源池不同。例如,第二资源池可以与第一资源池通过不同的信令配置。可以理解的是,第二资源池可以为PRS专用的资源池,即发送第一PRS的终端设备可以假设在第二资源池内不存在终端设备发送的侧行信道或信号。
通过以下实施例,下文将详细说明第一PRS的第一资源和第一控制信息的第二资源的情况。
实施例1、第一资源和第二资源均属于第一资源池
作为一种实现方式,第一资源池可以包括第三资源。用于传输第一PRS的第一资源可以位于第三资源的时频范围内。第三资源可以包括PSSCH所占用的资源和/或PSSCH的DMRS所占用的资源。也就是说,第一PRS可以与用于侧行通信的PSSCH一同发送。第一PRS的发送资源可以位于PSSCH和/或PSSCH的DMRS所占用的时频范围之内。
可选地,PSSCH所占用的资源和/或PSSCH的DMRS所占用的资源的时频范围可以根据上文所述的规则或相关技术(例如3GPP Rel-16标准)的规则确定。
作为另一种实现方式,第一资源池可以包括第四资源。用于传输第一PRS的第一资源可以位于第四资源所在的符号上。第四资源可以包括PSFCH所占用的资源。例如,第一资源可以位于PSFCH资源所在的OFDM符号上。可以理解的是,第一资源池中可以存在用于侧行通信的信道和/或信号。
承载第一控制信息的信道可以包括PSSCH和/或PSCCH。承载第一控制信息的PSSCH和/或PSCCH的结构可以和相关技术中的定义的结构相同,也可以不同。
作为一种实现方式,第一控制信息可以由调度PSSCH的侧行控制信息指示。可以理解的是,侧行控制信息可以仅用于指示第一控制信息,也可以仅用于指示侧行通信,还可以即用于指示第一控制信息,也用于指示侧行通信。以第一控制信息通过侧行控制信息指示为例,第一控制信息可以包含在第一阶SCI和/或第二阶SCI中。例如,用于承载侧行控制信息的PSCCH中的冗余比特可以用于指示该PSCCH调度的PSSCH中是否存在第一PRS。或者,可以定义新的第二阶SCI格式,以用于指示被调度的PSSCH中是否存在第一PRS和/或第一PRS的发送方式。其中,第一PRS的发送方式可以包括以下信息中的一项或多项:第一PRS占用的时频位置、第一PRS的重复次数以及第一PRS的序列等。
可选地,第一PRS的标识可以由调度PSSCH的PSCCH的CRC确定。例如,第一PRS的ID可以通过
确定,
可以满足
其中,p
i可以为调度该PSSCH的PSCCH的第i位CRC,L可以为PSCCH CRC的比特位数,L的值可以为L=24。
实施例2第一资源和第二资源均属于第二资源池
实施例2.1
第一资源和第二资源均属于第二资源池。第二资源可以不晚于第一资源。也就是说,第一控制信息可以不晚于第一PRS发送。例如,第二资源所在的时隙可以早于第一资源所在的时隙。或者,第一资源可以与第二资源在同一时隙。
作为一种实现方式,在第二资源池中,每P个时隙中的第一个时隙可以用于指示第一PRS的第一控制信息。P个时隙中第一个时隙和/或后续时隙可以用于传输第一PRS。其中,P为大于0的整数。
P个时隙中第一个时隙与后续时隙可以是连续的,也可以是不连续的。可选地,第一控制信息的第二资源可以位于时隙n,第一PRS的第一资源可以位于[n+T,n+T+P-1]范围内的时隙,T可以为大于或等于0的整数。其中,T可以表示第二资源和第一资源之间的最小间隙,即每P个时隙中第一个时隙与后续时隙的间隔。T的值可以由标准定义,例如T可以通过网络设备配置或预配置。终端设备可以根据T的最小值根据检测到的第一控制信息确定是否接收第一PRS。可以理解的是,当T=0时,P个时隙中 第一时隙与后续时隙是连续的,从而可以降低定位时延。
可以理解的是,第二资源不晚于第一资源,可以使得接收第一PRS的终端设备可以在接收到第一PRS对应的第一控制信息后,根据第一控制信息的指示确定是否接收第一PRS或者如何接收第一PRS(例如在时频资源位置等)。
第二资源池可以包括第一时隙,第一时隙可以在频域资源上进行区分,不同频域资源分别用于传输PRS和指示PRS的控制信息。也就是说,第一时隙可以包括用于传输PRS的资源(下文简称PRS资源)和用于传输指示PRS的控制信息的资源(下文简称控制信息资源),其中,PRS资源和控制信息资源可以位于不同的频域位置。也就是说,第二资源池中的第一时隙可以即用于指示PRS,也用于指示控制信息。例如,每P个时隙的第一个时隙可以为第一时隙。需要说明的是,用于传输PRS的资源也可以称为PRS资源或者PRS发送资源。PRS资源可以为终端设备发送PRS所占用的最小的资源粒度。用于传输指示PRS的控制信息的资源可以称为控制信息资源。控制信息资源可以为终端设备发送用于指示PRS的控制信息所占用的最小的资源粒度。对于控制信息通过PSCCH信道承载的情况,控制信息资源可以称为PSCCH资源。
图13为本申请实施例提供的一种第一时隙的划分方式示意图。如图13所示,第一时隙中可以在频域范围内可以包括第一部分和/或第二部分。其中,第一部分可以用于传输一个或多个PRS,第二部分可以用于传输一个或多个用于指示PRS的控制信息。第一部分和/或第二部分均可以位于用于PRS发送的OFDM符号。例如,第一部分可以用于传输第一PRS。第二部分可以用于传输第一控制信息。或者,终端设备还可以传输第二PRS以及第二控制信息,第二控制信息可以用于指示第二PRS。第一部分可以用于传输第一PRS和/或第二PRS。第二部分可以用于传输第一控制信息和/或第二控制信息。
可选地,第二部分占用的PRB可以低于第一部分占用的PRB。例如,一个时隙中的最低位的N个PRB可以为第二部分,剩余的PRB可以为第一部分。接收端可以从低位开始接收PRB,基于这种时隙结构,可以在接收第一PRS之前接收到第一控制信息,从而可以根据第一控制信息指示的信息接收第一PRS。
可以理解的是,如果第一时隙配置了用于传输指示PRS的控制信息的资源,第一时隙可以不配置用于传输PRS的资源。例如,第一时隙可以配置第一控制信息的传输资源和/或第二控制信息的传输资源,并且第一时隙可以不配置第一PRS的传输资源和第二PRS的传输资源。作为一个实现方式,每P个时隙中的第一个时隙可以为第一时隙,当P大于1时,第一时隙中可以不配置用于传输PRS(包括第一PRS和第二PRS)的资源。
可选地,第二部分的频域范围内可以包括多个用于传输控制信息的资源,用于传输控制信号的资源与用于传输PRS的资源一一对应。例如,第二PRS的传输资源可以为第三资源,第二控制信息的传输资源可以为第四资源。第三资源可以与用于传输第一PRS的第一资源不同,第四资源可以与用于传输第一控制信息的第二资源不同。第一资源与第二资源唯一映射,第三资源和第四资源唯一映射。
作为一种实现方式,用于传输指示PRS的控制信息的频域资源范围内可以包含M个控制信息资源,M个控制信息资源可以组成资源集合。M个控制信息资源可以分别用于指示M个PRS。其中M可以为大于0的整数。例如,可以为时隙[n+T,n+T+P-1]范围内PRS资源的个数。可以理解的是,每个控制信息资源可以与PRS资源一一映射。例如,资源集合内可以包括M个控制信息资源,索引可以分别为0,1,2,……,M-1,则第i个用于传输控制信息的资源可以映射到第i个PRS资源。其中,i可以表示PRS资源或用于传输控制信息的资源的索引,0≤i≤M-1。如果终端设备在第i个控制信息资源发送第一控制信息,则终端设备也在第i个PRS资源上发送第一PRS。
图14为本申请实施例提供的一个时隙中包括M个控制信息资源的示例图。图14所示的时频资源中,P=5,M=4。时隙#0可以为某5个时隙的第一时隙。控制信息资源可以通过PSCCH承载。时隙#0可以包括4个用于传输控制信息的资源,分别为PSCCH资源#0、PSCCH资源#1、PSCCH资源#2以及PSCCH资源#3。PSCCH资源#0、PSCCH资源#1、PSCCH资源#2以及PSCCH资源#3对应的PRS资源位于第2至第5个时隙。第2至第5个时隙分别配置有一个用于PRS传输的资源,分别为PRS资源#0、PRS资源#1、PRS资源#2以及PRS资源#3。PSCCH资源#0、PSCCH资源#1、PSCCH资源#2以及PSCCH资源#3与PRS资源#0、PRS资源#1、PRS资源#2以及PRS资源#3一一对应。
可以理解的是,同一个时隙内可以包括多个用于传输PRS的资源。多个PRS资源的索引可以是连续的,即多个用于传输PRS的物理资源是连续的。终端设备可以在多个PRS对应的用于传输指示PRS的控制信息的资源上传输指示PRS的控制信息。终端设备可以在一个资源上发送控制信息,通过该资源上特定的信息域指示占用的多个PRS资源。这可以降低峰均功率比(peak to average power ratio,PAPR)。
实施例2.2
第一资源和第二资源均属于第二资源池。第一资源和第二资源可以占用相同的时域资源。例如,第一资源和第二资源均可以属于第二时隙。第一资源和第二资源可以分别占用第二时隙的不同频域资源。第一资源占用的OFDM符号和第二资源占用的OFDM符号可以不同。在一些实施例中,第一资源和第二资源占用的相同的时域资源可以称为PRS及控制资源。PRS及控制资源可以包括多个部分。多个部分可以包括第一部分和第二部分。第一部分可以用于指示PRS的控制信息的传输,第二部分可以用于PRS的传输。
可以理解的是,第一资源占用的OFDM符号可以为一个或多个,第二资源占用的OFDM符号也可以为一个或多个。第一资源占用的OFDM符号和第二资源占用的OFDM符号可以部分不同。例如,第一资源占用的OFDM符号可以包括符号#1,第二资源占用的OFDM符号可以包括符号#1、符号#2以及符号#3。或者,第一资源占用的OFDM符号和第二资源占用的OFDM符号可以完全不同。例如,第一资源占用的OFDM符号可以包括符号#1,第二资源占用的OFDM符号可以包括符号#2、符号#3以及符号4#。
一个PRS及控制资源可以包括至少3个OFDM符号。其中,第一个OFDM符号可以用于AGC调整。第二个OFDM符号中的部分或全部资源可以用于传输PRS的控制信息。第二个OFDM符号的部分资源以及第二个OFDM符号以后的资源可以用于传输PRS。例如,第二资源可以占用第二个符号中的部分或全部资源。第一资源可以占用第二个符号以后的资源。在第二资源占用第二个符号中的部分资源的情况下,第一资源也可以占用第二个符号的部分资源。
在一个符号的部分资源用于第一PRS传输,部分资源用于第一控制信息传输的情况下,第一控制信息可以占用该符号从第一个PRB开始的部分资源,剩余的部分资源可以用于第一PRS的传输。也就是说,发送端终端设备可以从第一个PRB开始,按照先频域后时域的方式映射承载第一控制信息的PSCCH的调制符号,在此之后,可以在剩余的资源上发送第一PRS。
下面,通过图15和图16所示的实施例,举例说明第一资源占用的OFDM符号和第二资源占用的OFDM符号的情况。
图15为本申请实施例提供的一种资源划分方式的示例图。在该时隙内,一个PRS及控制资源可以占用4个OFDM符号。符号#0可以用于AGC。符号#1可以用于传输第一控制信息,符号#2和符号#3可以用于传输第一PRS。
图16为本申请实施例提供的另一种资源划分的示例图。在该时隙内,第一资源和第二资源可以占用4个OFDM符号。符号#0可以用于AGC。符号#1部分PRB可以用于传输第一控制信息,符号#1的剩余PRB可以用于传输第一PRS。符号#2和符号#3可以用于传输第一PRS。在这种情况下,承载第一控制信息的PSCCH的DMRS可以用于计算定位信息。
可以理解的是,第二时隙可以包括一个或多个PRS及控制资源。例如,第二时隙还可以包括用于第二PRS传输的资源以及用于第二控制信息传输的资源。
实施例3、第一资源属于第二资源池,第二资源属于第一资源池
作为一种实现方式,用于传输第一PRS的第一资源可以属于第二资源池。用于传输第一控制信息的第二资源可以属于第一资源池。
第一控制信息可以通过用于侧行通信的第一资源池内发送的PSSCH/PSCCH指示。用于侧行通信的第一资源池可以与一个或多个用于传输PRS的资源池关联。第一资源池内发送的PSCCH/PSSCH可以显式和/或隐式地指示与其关联的一个用于传输PRS的资源池内PRS的传输。
作为一种实现方式,第一资源池和第二资源池可以包含相同的时隙。在一个时隙内,前H个OFDM符号可以属于第二资源池,剩余的OFDM符号可以属于第一资源池。其中,H可以为大于0的整数。图17为本申请实施例提供的一个时隙的结构示意图。图17所示的时隙可以包括13个OFDM符号。前3个OFDM符号(符号0、1和2)可以属于第二资源池以用于传输PRS。后10个OFDM符号(符号3~13)可以属于第一资源池以用于侧行通信以及指示PRS。
可以理解的是,第一资源和第二资源可以位于不同的时隙。例如,第一资源可以位于时隙m,第二资源可以位于时隙n。m和n可以为大于0的整数。时隙m和时隙n之间可以存在间隔。间隔可以由PSCCH/PSSCH中承载的信息指示。或者,间隔可以不小于特定值,特定值例如可以为第一个属于第二资源池的时隙编号。
可选地,第一PRS可以以特定的周期发送,也可以在每个周期内可以发送多次。第一PRS的发送周期和/或每个周期内的发送次数可以通过PSCCH/PSSCH中承载的信息指示。例如,第一PRS的发送周期可以由PSCCH中指示的PSCCH的发送周期直接或间接地确定。作为一种实现方式,第一PRS的发送周期可以与PSCCH中指示的PSCCH的发送周期相同。例如,第一PRS在每个周期内的发送次数可以由。PSCCH中指示的PSCCH的重复次数直接或间接地确定。
上文结合图1至图17,详细描述了本申请的方法实施例,下面结合图18至图19,详细描述本申请的装置实施例。应理解,方法实施例的描述与装置实施例的描述相互对应,因此,未详细描述的部分可以参见前面方法实施例。
图18为本申请实施例提供的一种终端设备1800的结构示意图。终端设备1800可以包括第一传输单元1810。
第一传输单元1810可以用于在侧行链路上传输第一定位参考信号PRS和第一控制信息,所述第一控制信息用于指示所述第一PRS。
可选地,所述第一PRS的传输资源为第一资源,所述第一控制信息的传输资源为第二资源,所述第一资源和所述第二资源均属于第一资源池,所述第一资源池用于侧行通信。
可选地,所述第一资源池包括第三资源,所述第三资源包括物理侧行共享信道PSSCH所占用的资源和/或PSSCH的解调参考信号DMRS所占用的资源,所述第一资源位于所述第三资源的范围内。
可选地,所述第一资源池包括第四资源,所述第四资源包括物理侧行反馈信道PSFCH所占用的资源,所述第一资源位于所述第四资源所在的符号上。
可选地,所述第一控制信息包含在第一阶侧行链路控制信息SCI和/或第二阶SCI中。
可选地,所述第一资源池包括调度PSSCH的物理侧行控制信道PSCCH所占用的资源,所述第一PRS的标识由所述调度PSSCH的PSCCH的循环冗余校验CRC确定。
可选地,所述第一PRS的传输资源为第一资源,所述第一资源属于第二资源池,所述第二资源池与用于侧行通信的第一资源池通过不同的信令配置。
可选地,所述第一控制信息的传输资源为第二资源,所述第二资源属于所述第二资源池。
可选地,所述第二资源不晚于所述第一资源。
可选地,所述终端设备还可以包括第二传输单元。
第二传输单元用于传输第二PRS和第二控制信息;其中,所述第二PRS通过所述第二控制信息指示,所述第二资源池包括第一时隙,所述第一时隙在频域范围内包括第一部分和/或第二部分,所述第一部分用于传输所述第一PRS和/或所述第二PRS,所述第二部分用于传输所述第一控制信息和/或所述第二控制信息。
可选地,所述第二部分占用的物理资源块PRB低于所述第一部分占用的PRB。
可选地,所述第二资源池包括第二时隙,所述第一资源和所述第二资源均属于所述第二时隙,所述第一资源占用的OFDM符号和所述第二资源占用的OFDM符号不同。
可选地,所述第一控制信息的传输资源为第二资源,所述第二资源属于所述第一资源池。
可选地,所述第一资源池包括调度PSSCH的PSCCH所占用的资源,所述第一控制信息包括所述第一PRS的重复次数,所述第一PRS的重复次数由PSCCH中指示PSSCH的重复次数确定。
可选地,所述第一资源池包括调度PSSCH的PSCCH所占用的资源,所述第一控制信息包括所述第一PRS的发送周期,所述第一PRS的发送周期由PSCCH中指示PSSCH的发送周期确定。
可选地,所述第一控制信息包括以下信息中的一项或多项:所述第一PRS的标识,所述第一PRS占用的资源位置,所述第一PRS的重复次数,所述第一PRS的发送周期,以及发送所述第一PRS的终端设备的信息。
可选地,所述终端设备还可以包括第一确定单元。第一确定单元可以用于根据所述第一PRS确定所述终端设备的全球定位坐标。
可选地,所述终端设备和第一设备进行侧行通信,所述终端设备还可以包括第二确定单元。第二确定单元可以用于根据所述第一PRS确定所述终端设备相对于所述第一设备的距离和/或方向。
图19是本申请实施例的通信装置的示意性结构图。图19中的虚线表示该单元或模块为可选的。该装置1900可用于实现上述方法实施例中描述的方法。装置1900可以是芯片、终端设备或网络设备。
装置1900可以包括一个或多个处理器1910。该处理器1910可支持装置1900实现前文方法实施例所描述的方法。该处理器1910可以是通用处理器或者专用处理器。例如,该处理器可以为中央处理单元(central processing unit,CPU)。或者,该处理器还可以是其他通用处理器、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、分立硬件组件等。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。
装置1900还可以包括一个或多个存储器1920。存储器1920上存储有程序,该程序可以被处理器1910执行,使得处理器1910执行前文方法实施例所描述的方法。存储器1920可以独立于处理器1910也可以集成在处理器1910中。
装置1900还可以包括收发器1930。处理器1910可以通过收发器1930与其他设备或芯片进行通 信。例如,处理器1910可以通过收发器1930与其他设备或芯片进行数据收发。
本申请实施例还提供一种计算机可读存储介质,用于存储程序。该计算机可读存储介质可应用于本申请实施例提供的终端或网络设备中,并且该程序使得计算机执行本申请各个实施例中的由终端或网络设备执行的方法。
本申请实施例还提供一种计算机程序产品。该计算机程序产品包括程序。该计算机程序产品可应用于本申请实施例提供的终端或网络设备中,并且该程序使得计算机执行本申请各个实施例中的由终端或网络设备执行的方法。
本申请实施例还提供一种计算机程序。该计算机程序可应用于本申请实施例提供的终端或网络设备中,并且该计算机程序使得计算机执行本申请各个实施例中的由终端或网络设备执行的方法。
应理解,本申请中术语“***”和“网络”可以被可互换使用。另外,本申请使用的术语仅用于对本申请的具体实施例进行解释,而非旨在限定本申请。本申请的说明书和权利要求书及所述附图中的术语“第一”、“第二”、“第三”和“第四”等是用于区别不同对象,而不是用于描述特定顺序。此外,术语“包括”和“具有”以及它们任何变形,意图在于覆盖不排他的包含。
在本申请的实施例中,提到的“指示”可以是直接指示,也可以是间接指示,还可以是表示具有关联关系。举例说明,A指示B,可以表示A直接指示B,例如B可以通过A获取;也可以表示A间接指示B,例如A指示C,B可以通过C获取;还可以表示A和B之间具有关联关系。
在本申请实施例中,“与A相应的B”表示B与A相关联,根据A可以确定B。但还应理解,根据A确定B并不意味着仅仅根据A确定B,还可以根据A和/或其它信息确定B。
在本申请实施例中,术语“对应”可表示两者之间具有直接对应或间接对应的关系,也可以表示两者之间具有关联关系,也可以是指示与被指示、配置与被配置等关系。
本申请实施例中,“预定义”或“预配置”可以通过在设备(例如,包括终端设备和网络设备)中预先保存相应的代码、表格或其他可用于指示相关信息的方式来实现,本申请对于其具体的实现方式不做限定。比如预定义可以是指协议中定义的。
本申请实施例中,所述“协议”可以指通信领域的标准协议,例如可以包括LTE协议、NR协议以及应用于未来的通信***中的相关协议,本申请对此不做限定。
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,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。
在本申请的各种实施例中,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。
在本申请所提供的几个实施例中,应该理解到,所揭露的***、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***,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。
在上述实施例中,可以全部或部分地通过软件、硬件、固件或者其任意组合来实现。当使用软件实现时,可以全部或部分地以计算机程序产品的形式实现。所述计算机程序产品包括一个或多个计算机指令。在计算机上加载和执行所述计算机程序指令时,全部或部分地产生按照本申请实施例所述的流程或功能。所述计算机可以是通用计算机、专用计算机、计算机网络、或者其他可编程装置。所述计算机指令可以存储在计算机可读存储介质中,或者从一个计算机可读存储介质向另一个计算机可读存储介质传输,例如,所述计算机指令可以从一个网站站点、计算机、服务器或数据中心通过有线(例如同轴电缆、光纤、数字用户线(digital subscriber line,DSL))或无线(例如红外、无线、微波等)方式向另一个网站站点、计算机、服务器或数据中心进行传输。所述计算机可读存储介质可以是计算机能够读取的任何可用介质或者是包含一个或多个可用介质集成的服务器、数据中心等数据存储设备。所述可用介质可以是磁性介质,(例如,软盘、硬盘、磁带)、光介质(例如,数字通用光盘(digital video disc,DVD))或者半导体介质(例如,固态硬盘(solid state disk,SSD))等。
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 (42)
- 一种通信方法,其特征在于,包括:终端设备在侧行链路上传输第一定位参考信号PRS和第一控制信息,所述第一控制信息用于指示所述第一PRS。
- 根据权利要求1所述的方法,其特征在于,所述第一PRS的传输资源为第一资源,所述第一控制信息的传输资源为第二资源,所述第一资源和所述第二资源均属于第一资源池,所述第一资源池用于侧行通信。
- 根据权利要求2所述的方法,其特征在于,所述第一资源池包括第三资源,所述第三资源包括物理侧行共享信道PSSCH所占用的资源和/或PSSCH的解调参考信号DMRS所占用的资源,所述第一资源位于所述第三资源的范围内。
- 根据权利要求2所述的方法,其特征在于,所述第一资源池包括第四资源,所述第四资源包括物理侧行反馈信道PSFCH所占用的资源,所述第一资源位于所述第四资源所在的符号上。
- 根据权利要求2~4中任一项所述的方法,其特征在于,所述第一控制信息包含在第一阶侧行链路控制信息SCI和/或第二阶SCI中。
- 根据权利要求2~5中任一项所述的方法,其特征在于,所述第一资源池包括调度PSSCH的物理侧行控制信道PSCCH所占用的资源,所述第一PRS的标识由所述调度PSSCH的PSCCH的循环冗余校验CRC确定。
- 根据权利要求1所述的方法,其特征在于,所述第一PRS的传输资源为第一资源,所述第一资源属于第二资源池,所述第二资源池与用于侧行通信的第一资源池通过不同的信令配置。
- 根据权利要求7所述的方法,其特征在于,所述第一控制信息的传输资源为第二资源,所述第二资源属于所述第二资源池。
- 根据权利要求8所述的方法,其特征在于,所述第二资源不晚于所述第一资源。
- 根据权利要求8或9所述的方法,其特征在于,所述方法还包括:所述终端设备传输第二PRS;其中,所述第二PRS通过第二控制信息指示,所述第二资源池包括第一时隙,所述第一时隙在频域范围内包括第一部分和/或第二部分,所述第一部分用于传输所述第一PRS和/或所述第二PRS,所述第二部分用于传输所述第一控制信息和/或所述第二控制信息。
- 根据权利要求10所述的方法,其特征在于,所述第二部分占用的物理资源块PRB低于所述第一部分占用的PRB。
- 根据权利要求8所述的方法,其特征在于,所述第二资源池包括第二时隙,所述第一资源和所述第二资源均属于所述第二时隙,所述第一资源占用的正交频分复用OFDM符号和所述第二资源占用的OFDM符号不同。
- 根据权利要求7所述的方法,其特征在于,所述第一控制信息的传输资源为第二资源,所述第二资源属于所述第一资源池。
- 根据权利要求13所述的方法,其特征在于,所述第一资源池包括调度PSSCH的PSCCH所占用的资源,所述第一控制信息包括所述第一PRS的重复次数,所述第一PRS的重复次数由PSCCH中指示PSSCH的重复次数确定。
- 根据权利要求13或14所述的方法,其特征在于,所述第一资源池包括调度PSSCH的PSCCH所占用的资源,所述第一控制信息包括所述第一PRS的发送周期,所述第一PRS的发送周期由PSCCH中指示PSSCH的发送周期确定。
- 根据权利要求1~15中任一项所述的方法,其特征在于,所述第一控制信息包括以下信息中的一项或多项:所述第一PRS的标识,所述第一PRS占用的资源位置,所述第一PRS的重复次数,所述第一PRS的发送周期,以及发送所述第一PRS的终端设备的信息。
- 根据权利要求1~16中任一项所述的方法,其特征在于,所述方法还包括:所述终端设备根据所述第一PRS确定所述终端设备的全球定位坐标。
- 根据权利要求1~16中任一项所述的方法,其特征在于,所述终端设备和第一设备进行侧行通信,所述方法还包括:所述终端设备根据所述第一PRS确定所述终端设备相对于所述第一设备的距离和/或方向。
- 一种终端设备,其特征在于,包括:第一传输单元,用于在侧行链路上传输第一定位参考信号PRS和第一控制信息,所述第一控制信息用于指示所述第一PRS。
- 根据权利要求19所述的终端设备,其特征在于,所述第一PRS的传输资源为第一资源,所述第一控制信息的传输资源为第二资源,所述第一资源和所述第二资源均属于第一资源池,所述第一资源池用于侧行通信。
- 根据权利要求20所述的终端设备,其特征在于,所述第一资源池包括第三资源,所述第三资源包括物理侧行共享信道PSSCH所占用的资源和/或PSSCH的解调参考信号DMRS所占用的资源,所述第一资源位于所述第三资源的范围内。
- 根据权利要求20所述的终端设备,其特征在于,所述第一资源池包括第四资源,所述第四资源包括物理侧行反馈信道PSFCH所占用的资源,所述第一资源位于所述第四资源所在的符号上。
- 根据权利要求20~22中任一项所述的终端设备,其特征在于,所述第一控制信息包含在第一阶侧行链路控制信息SCI和/或第二阶SCI中。
- 根据权利要求20~23中任一项所述的终端设备,其特征在于,所述第一资源池包括调度PSSCH的物理侧行控制信道PSCCH所占用的资源,所述第一PRS的标识由所述调度PSSCH的PSCCH的循环冗余校验CRC确定。
- 根据权利要求19所述的终端设备,其特征在于,所述第一PRS的传输资源为第一资源,所述第一资源属于第二资源池,所述第二资源池与用于侧行通信的第一资源池通过不同的信令配置。
- 根据权利要求25所述的终端设备,其特征在于,所述第一控制信息的传输资源为第二资源,所述第二资源属于所述第二资源池。
- 根据权利要求26所述的终端设备,其特征在于,所述第二资源不晚于所述第一资源。
- 根据权利要求26或27所述的终端设备,其特征在于,所述终端设备还包括:第二传输单元,用于传输第二PRS和第二控制信息;其中,所述第二PRS通过所述第二控制信息指示,所述第二资源池包括第一时隙,所述第一时隙在频域范围内包括第一部分和/或第二部分,所述第一部分用于传输所述第一PRS和/或所述第二PRS,所述第二部分用于传输所述第一控制信息和/或所述第二控制信息。
- 根据权利要求28所述的终端设备,其特征在于,所述第二部分占用的物理资源块PRB低于所述第一部分占用的PRB。
- 根据权利要求26所述的终端设备,其特征在于,所述第二资源池包括第二时隙,所述第一资源和所述第二资源均属于所述第二时隙,所述第一资源占用的正交频分复用OFDM符号和所述第二资源占用的OFDM符号不同。
- 根据权利要求25所述的终端设备,其特征在于,所述第一控制信息的传输资源为第二资源,所述第二资源属于所述第一资源池。
- 根据权利要求31所述的终端设备,其特征在于,所述第一资源池包括调度PSSCH的PSCCH所占用的资源,所述第一控制信息包括所述第一PRS的重复次数,所述第一PRS的重复次数由PSCCH中指示PSSCH的重复次数确定。
- 根据权利要求31或32所述的终端设备,其特征在于,所述第一资源池包括调度PSSCH的PSCCH所占用的资源,所述第一控制信息包括所述第一PRS的发送周期,所述第一PRS的发送周期由PSCCH中指示PSSCH的发送周期确定。
- 根据权利要求19~33中任一项所述的终端设备,其特征在于,所述第一控制信息包括以下信息中的一项或多项:所述第一PRS的标识,所述第一PRS占用的资源位置,所述第一PRS的重复次数,所述第一PRS的发送周期,以及发送所述第一PRS的终端设备的信息。
- 根据权利要求19~34中任一项所述的终端设备,其特征在于,所述终端设备还包括:第一确定单元,用于根据所述第一PRS确定所述终端设备的全球定位坐标。
- 根据权利要求19~35中任一项所述的终端设备,其特征在于,所述终端设备和第一设备进行侧行通信,所述终端设备还包括:第二确定单元,用于根据所述第一PRS确定所述终端设备相对于所述第一设备的距离和/或方向。
- 一种终端设备,其特征在于,包括存储器和处理器,所述存储器用于存储程序,所述处理器用于调用所述存储器中的程序,以执行如权利要求1-18中任一项所述的方法。
- 一种装置,其特征在于,包括处理器,用于从存储器中调用程序,以执行如权利要求1-18中任一项所述的方法。
- 一种芯片,其特征在于,包括处理器,用于从存储器调用程序,使得安装有所述芯片的设备执行如权利要求1-18中任一项所述的方法。
- 一种计算机可读存储介质,其特征在于,其上存储有程序,所述程序使得计算机执行如权利要求1-18中任一项所述的方法。
- 一种计算机程序产品,其特征在于,包括程序,所述程序使得计算机执行如权利要求1-18中任一项所述的方法。
- 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1-18中任一项所述的方法。
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