CN115734292A - Communication method and device - Google Patents

Communication method and device Download PDF

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Publication number
CN115734292A
CN115734292A CN202110990776.2A CN202110990776A CN115734292A CN 115734292 A CN115734292 A CN 115734292A CN 202110990776 A CN202110990776 A CN 202110990776A CN 115734292 A CN115734292 A CN 115734292A
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China
Prior art keywords
resource
frequency
information
terminal device
data
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CN202110990776.2A
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Chinese (zh)
Inventor
黎超
张天虹
杨帆
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Huawei Technologies Co Ltd
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Huawei Technologies Co Ltd
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Priority to CN202110990776.2A priority Critical patent/CN115734292A/en
Priority to PCT/CN2022/112603 priority patent/WO2023024957A1/en
Publication of CN115734292A publication Critical patent/CN115734292A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/26—Resource reservation
    • 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
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA

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

Abstract

The application provides a communication method and device, which are used for improving the communication performance of terminal equipment and are suitable for the fields of V2X, internet of vehicles, intelligent driving, intelligent Internet of vehicles and the like. The method comprises the following steps: receiving first information on a first frequency, the first information being used to indicate a first resource of a first terminal device on a second frequency, the second frequency being higher than the first frequency; a second resource is determined based on the first resource and data is transmitted on a second frequency using the determined second resource, the second resource being used to transmit data on the second frequency. By the method, the indication of resource reservation on the second frequency can be quickly and effectively realized, and the beam scanning can be omitted by indicating the resource on the second frequency on the first frequency, so that the detection time length can be shortened, and the time for selecting the resource can be shortened. And, the possibility of missing the first information can be reduced, so that the system performance when operating on the second frequency can be improved.

Description

Communication method and device
Technical Field
The present application relates to the field of communications technologies, and in particular, to a communication method and apparatus.
Background
In the New Radio (NR), there are two transmission modes (modes) related to the resource allocation of the sidelink (sidelink), one is a mode 1 (mode-1) for allocating resources for the network device, and the other is a mode 2 (mode-2) for the user self-selection resources. In mode-2, the terminal equipment at the sending end intercepts the resources in an interception time window, and automatically selects the resources in a resource selection window according to an interception result to carry out communication.
With the development of communication, in a low-frequency band (e.g., a first frequency band), a terminal device transmits and receives using a non-directional beam (e.g., a wide beam such as 120 degrees, 360 degrees, etc.), and in a high-frequency millimeter wave (e.g., a second frequency band), a terminal device transmits and receives using a directional beam (e.g., a narrow beam such as 10 degrees, 15 degrees, 20 degrees, etc.). Directional beams are very different from non-directional beams, e.g. the signals transmitted by the transmitter through the directional beam are transmitted to a specific beam direction; when the receiver receives in a specific beam direction through the directional beam, the receiver receives signals in the corresponding receiving direction. Under the directional beam, the signals of the adjacent terminal devices may not be received due to the different beam directions used between the adjacent terminal devices. In the non-directional beam, the adjacent terminal device receives the signal of the adjacent terminal device. Therefore, after the directional beam is introduced, how the terminal device performs resource selection in the mode-2 mode is an urgent problem to be solved.
Disclosure of Invention
The application provides a communication method and device, which are used for improving the communication performance of terminal equipment.
In a first aspect, the present application provides a communication method, and an execution subject of the method may be a terminal device, or may be a chip or a circuit. The method comprises the following steps: receiving first information on a first frequency, the first information being used to indicate a first resource of a first terminal device on a second frequency, the second frequency being higher than the first frequency; a second resource is determined based on the first resource and data is transmitted on a second frequency using the determined second resource, the second resource being used to transmit data on the second frequency.
By the scheme provided by the embodiment of the application, the indication of resource reservation on the second frequency can be quickly and effectively realized, and the beam scanning can be omitted by indicating the resource on the second frequency on the first frequency, so that the duration of SCI detection can be shortened, and the time for selecting the resource can be shortened. And compared with the beam scanning mode, the possibility of missing the first information can be reduced, so that the system performance when the system works on the second frequency can be improved.
In one possible design, the first information may include an indication of frequency domain resources of the first resources, the frequency domain resources being determined based on a subband size configured on the second frequency.
In one possible design, when determining the second resource based on the first resource, a third resource may be determined in the candidate resource set of the second frequency based on the first resource, and the third resource may be excluded from the candidate resource set to obtain the first resource set. A second resource is determined in the first set of resources. In this way, the measurement time and measurement power consumption on the second frequency can be reduced significantly.
In one possible design, when determining the third resource in the candidate resource set of the second frequency based on the first resource, the third resource may be determined according to the timeslot where the first resource is located and the reservation period indicated in the first information.
In one possible design, when excluding the third resource from the candidate set of resources, the third resource may be excluded from the candidate set of resources when at least one of the following conditions is satisfied: the signal quality corresponding to the first information exceeds a first preset threshold; the signal quality corresponding to the second information exceeds a second preset threshold, the second information is received on a second frequency, and the second information includes indication information of the first resource. The resource utilization rate can be improved through the method.
In one possible design, the method further comprises: receiving indication information of the first resource using the first beam on the second frequency.
In one possible design, the first beam is determined according to at least one of: a second terminal device transmitting a beam on a second frequency; a first terminal device transmitting a beam on a second frequency; device identification information of the second terminal device and/or the third terminal device; the position information of the second terminal device and the position information of the third terminal device; the first information comprises a source identification and/or a destination identification; the transmission type used for sending data; a beam direction of a transmit beam of the first terminal device on the second frequency; a set of candidate beams, the set of candidate beams comprising at least one beam; and the third terminal equipment is the terminal equipment which communicates with the second terminal equipment on the second frequency. By the mode, the accuracy of measurement can be improved. For example, in the embodiment that the first beam is determined according to the location information of the second terminal device and the location information of the third terminal device, it is beneficial to make the measured interference state the same as the measurement state when the third terminal device receives, so as to improve the accuracy of the measurement. For another example, in embodiments where the first beam is determined from a set of candidate beams, by performing measurements for multiple directions, the candidate beams for resource selection may be increased, thereby increasing the reliability of the selected resource in the spatial direction.
In a possible design, when determining the second resource in the first resource set, the second resource may be determined in the first resource set in a case that the number of resources in the first resource set is greater than a first threshold, or in a case that the number of resources in the first resource set is smaller than a second threshold and the number of resources in the first resource set is greater than the number of resources in the second resource set. By this way, the candidate resource on the second frequency can be determined according to the measurement on the first frequency, thereby greatly reducing the measurement time and the measurement power consumption on the second frequency.
In one possible design, when determining the second resource in the first resource set, a part of resources of the second resource may be determined in the first resource set and the remaining resources of the second resource may be determined in the second resource set, where the number of resources in the first resource set is smaller than a first threshold and the number of resources in the first resource set is smaller than the number of resources in the second resource set, and the second resource set is a complement of the first resource set in the candidate resource set. In this way, the candidate resource on the second frequency can be preferentially selected according to the measurement on the first frequency, so that the measurement time and the measurement power consumption on the second frequency can be greatly reduced.
In one possible design, when determining the second resource based on the first resource, the first time slot may be determined in the candidate time slot set of the second frequency based on the time slot in which the first resource is located; excluding the first time slot from the candidate time slot set to obtain a first time slot set; and determining a second resource in the candidate resources corresponding to the first time slot set. In the foregoing implementation manner, by excluding the time slot occupied by the transmission on the detected second frequency and transmitting on the unoccupied time slot, the interference influence caused by the misalignment of the beam direction determination can be reduced.
In one possible design, the communication on the first resource corresponds to a transmission type that is different from a transmission type of the data.
In one possible design, when determining the second resource based on the first resource, at least one third message may be received in a timeslot included in a second set based on the second frequency, where the second set includes at least one timeslot other than the timeslot corresponding to the first resource, and the third message is used to indicate a resource of the corresponding terminal device on the second frequency; determining a fourth resource in the candidate resource set of the second frequency according to the resource indicated by the at least one third information; determining a third resource in the candidate set of resources based on the first resource; excluding the third resource and the fourth resource from the candidate resource set to obtain a third resource set; a second resource is determined in the third set of resources. In the mode, all resources are completely detected, the beam sending direction is not considered, the cleanest candidate resource can be selected as far as possible, the probability of resource conflict can be reduced, the accuracy of resource selection is improved, and therefore the system performance can be improved.
In one possible design, the first information includes information indicating the first resource and at least one of: the method comprises the steps of sending beam direction information of a beam on a second frequency by first terminal equipment, transmission type indication information of data on first resources, priority information of the data on the first resources, position information of the first terminal equipment, a source identifier and a destination identifier.
In one possible design, the beam indication information is used to indicate a direction of a transmission beam of the first terminal device in a preset coordinate axis. By the method, the second terminal equipment can judge the influence on the transmission of the second terminal equipment when receiving data according to the beam indication information of the first terminal equipment.
In one possible design, the beam indication information includes: beam indication information in the horizontal direction and/or the vertical direction. By the method, the second terminal equipment can judge the influence on the transmission of the second terminal equipment when receiving data according to the beam indication information of the first terminal equipment.
In one possible design, the transmission mode of the data is associated with a preset state value of the beam indication information. Through the method, the receiving device (such as the second terminal device) can judge the influence of other unicast, multicast or broadcast modes on the transmission of the receiving device (such as the first terminal device) according to the transmitting beam direction of other terminal devices (such as the first terminal device).
In one possible design, when the data transmission mode is unicast, a first preset state value corresponding to the beam indication information is set; or when the transmission mode of the data is multicast, corresponding to a second preset state value of the beam indication information; or, when the transmission mode of the data is broadcast, the third preset state value corresponding to the beam indication information. Through the design, the second terminal equipment is facilitated to determine the service type of the first terminal equipment.
In one possible design, the method further comprises: receiving fifth information on the first frequency, the fifth information indicating: the first level control information carrying the fifth information is used to indicate the first information. By the method, the resource reservation made for the second frequency can be transmitted on the first frequency, the compatibility with the old function can be realized, and the use efficiency of the resource on the first frequency can be improved.
In one possible design, the fifth information is carried in at least one of the following fields in the first level control information: a first field for indicating a second level control information format, a second field for indicating a modulation and coding scheme, MCS, a third field for indicating an MCS table, a reserved field. By the method, signaling overhead can be saved.
In one possible design, if the value of the first field is 10 or 11, the first field carries fifth information; or if the value of the second field is 29, 30 or 31, the second field bears fifth information; or if the value of the third field is 11, the third field carries fifth information; or, if the value of the reserved field is greater than zero, the reserved field carries the fifth information.
In one possible design, the first frequency has a center frequency value lower than a first predetermined frequency value, and the second frequency has a center frequency value higher than a second predetermined frequency value; or the center frequency value of the first frequency is lower than the center frequency value of the second frequency; or, the first frequency is a first carrier wave, and the second frequency is a second carrier wave; or, the first frequency is a first bandwidth part, and the second frequency is a second bandwidth part; or the first frequency is a first resource pool, and the second frequency is a second resource pool; or, the first frequency is a first sub-channel, and the second frequency is a second sub-channel; or, the first frequency is a first resource block, and the second frequency is a second resource block.
In one possible design, the method further comprises: re-evaluation and preemption evaluation of resources is performed based on the first beam. By the method, resource conflict can be further reduced, and transmission performance is improved.
In one possible design, the first resource includes: the resource occupied by the current transmission of the first terminal equipment on the second frequency and/or the resource reserved by the transmission of the first terminal equipment after the current transmission on the second frequency.
In a second aspect, the present application provides a communication method, and an execution subject of the method may be a terminal device, or may be a chip or a circuit. The method comprises the following steps: determining a first resource for transmitting data on a second frequency; generating first information, wherein the first information is used for indicating first resources of the first terminal equipment on the second frequency; the first information is transmitted on a first frequency, and the second frequency is higher than the first frequency.
By the scheme provided by the embodiment of the application, the indication of resource reservation on the second frequency can be quickly and effectively realized, and the beam scanning can be omitted by indicating the resource on the second frequency on the first frequency, so that the duration of SCI detection can be shortened, and the time for selecting the resource can be further shortened. And compared with the beam scanning mode, the possibility of missing the first information can be reduced, so that the system performance when the system works on the second frequency can be improved.
In one possible design, the first information may include an indication of frequency domain resources of the first resources, the frequency domain resources being determined based on a subband size configured on the second frequency.
In one possible design, the first information includes information indicating the first resource and at least one of: the first terminal device sends beam indication information of a beam on a second frequency, transmission type indication information of communication on the first resource, priority information of data on the first resource, position information of the first terminal device, a source identifier and a destination identifier.
In one possible design, the beam indication information is used to indicate a direction of a transmission beam of the first terminal device in a preset coordinate axis. By the method, the second terminal equipment can judge the influence on the transmission of the second terminal equipment when receiving data according to the beam indication information of the first terminal equipment.
In one possible design, the beam indication information includes: beam indication information in the horizontal direction and/or the vertical direction. By the method, the second terminal equipment can judge the influence on the transmission of the second terminal equipment when receiving data according to the beam indication information of the first terminal equipment.
In one possible design, the transmission mode of the data is associated with a preset state value of the beam indication information. Through the method, the receiving device (such as the second terminal device) can judge the influence of other unicast, multicast or broadcast modes on the transmission of the receiving device (such as the first terminal device) according to the transmitting beam direction of other terminal devices (such as the first terminal device).
In one possible design, when the transmission mode of the data is unicast, a first preset state value corresponding to the beam indication information is set; or when the transmission mode of the data is multicast, corresponding to a second preset state value of the beam indication information; or, when the transmission mode of the data is broadcast, the third preset state value of the corresponding beam indication information. Through the design, the second terminal equipment is facilitated to determine the service type of the first terminal equipment.
In one possible design, the method further comprises: transmitting fifth information on the first frequency, the fifth information indicating: the first level control information carrying the fifth information is used to indicate the first information. By the method, the resource reservation made for the second frequency can be transmitted on the first frequency, the compatibility with the old function can be realized, and the use efficiency of the resource on the first frequency can be improved.
In one possible design, the fifth information is carried in at least one of the following fields in the first level control information: a first field for indicating a second level control information format, a second field for indicating a modulation and coding scheme, MCS, a third field for indicating an MCS table, a reserved field. By the method, signaling overhead can be saved.
In one possible design, if the value of the first field is 10 or 11, the first field carries fifth information; or if the value of the second field is 29, 30 or 31, the second field carries fifth information; or if the value of the third field is 11, the third field carries fifth information; or if the value of the reserved field is larger than zero, the reserved field carries the fifth information.
In one possible design, transmitting first information on a first frequency includes: transmitting first information on a first frequency when a first condition is satisfied, wherein the first condition comprises one or more of: receiving configuration information, wherein the configuration information is used for indicating that the first terminal equipment enables the transmission of the first information on the first frequency; detecting that a channel occupancy on a resource pool of a second frequency is above a first threshold on the second frequency; detecting that a channel busy ratio on a resource pool of a second frequency is above a second threshold on the second frequency; detecting that a channel quality on a resource pool of a second frequency is below a third threshold on the second frequency; the priority of the data is higher than the fourth threshold; the reply message for the data includes at least one NACK; the distance between the first terminal equipment and the second terminal equipment is greater than a fifth threshold; the first terminal device is configured with a power save transmission mode. The resource utilization rate can be improved through the method.
In one possible design, the first frequency has a center frequency value lower than a first predetermined frequency value, and the second frequency has a center frequency value higher than a second predetermined frequency value; or the central frequency value of the first frequency is lower than the central frequency value of the second frequency; or, the first frequency is a first carrier wave, and the second frequency is a second carrier wave; or, the first frequency is a first bandwidth part, and the second frequency is a second bandwidth part; or the first frequency is a first resource pool, and the second frequency is a second resource pool; or, the first frequency is a first sub-channel, and the second frequency is a second sub-channel; or, the first frequency is a first resource block, and the second frequency is a second resource block.
In one possible design, the resource occupied by the current transmission by the first terminal device on the second frequency and/or the resource reserved by the first terminal device for the transmission after the current transmission on the second frequency.
In a third aspect, the present application provides a communication method, where an execution subject of the method may be a terminal device, or may be a chip or a circuit. The method comprises the following steps: determining a first beam at a second frequency; detecting first information on a second frequency by using a first beam, wherein the first information is used for indicating a first resource of a second terminal device on the second frequency; and determining a second resource according to the first resource, wherein the second resource is used for the first terminal equipment to send data on a second frequency.
In the embodiment of the application, when measurement is performed on the second frequency, the accuracy of resource selection can be improved by performing corresponding resource measurement and elimination according to the determined beam direction, and further, the communication performance can be improved. And by associating the threshold for resource exclusion to different beam directions, the accuracy of resource selection can be further improved.
In one possible design, the first information includes beam indication information indicating a direction of a transmission beam of the second terminal device in a preset coordinate axis. By the method, the first terminal device can judge the influence on self transmission when receiving data according to the beam indication information of the second terminal device.
In one possible design, the beam indication information includes: beam indication information in the horizontal direction and/or the vertical direction. By the method, the first terminal device can judge the influence on self transmission when receiving data according to the beam indication information of the second terminal device.
In one possible design, the first beam is determined according to at least one of: a second terminal device transmitting a beam on a second frequency; a first terminal device transmitting a beam on a second frequency; position information of the first terminal device and position information of the third terminal device; a source identification and/or a destination identification of the first information; a transmission type of a communication on a first resource; a beam direction of a transmit beam of the second terminal device on the second frequency; a set of candidate beams, the set of candidate beams comprising at least one beam; and the third terminal equipment is the terminal equipment which communicates with the first terminal equipment on the second frequency. By this way, the accuracy of measurement can be improved. For example, in the embodiment that the first beam is determined according to the location information of the second terminal device and the location information of the third terminal device, it is beneficial to make the measured interference state the same as the measurement state when the third terminal device receives, so as to improve the accuracy of measurement. For another example, in an embodiment where the first beam is determined from a set of candidate beams, by performing measurements for multiple directions, the candidate beams for resource selection may be increased, and thus the reliability of the selected resource in the spatial direction may be increased.
In one possible design, determining the second resource based on the first resource includes: determining a third resource in the candidate set of resources at the second frequency based on the first resource; excluding the third resource from the candidate resource set to obtain a first resource set; a second resource is determined in the first set of resources. In this way, the candidate resource on the second frequency can be preferentially selected according to the measurement on the first frequency, so that the measurement time and the measurement power consumption on the second frequency can be greatly reduced.
In one possible design, determining the third resource in the candidate resource set of the second frequency based on the first resource includes determining the third resource according to a time slot in which the first resource is located and a reservation period indicated in the first information.
In one possible design, excluding the third resource from the set of candidate resources includes: and when the signal quality corresponding to the first information exceeds a preset threshold, excluding a third resource from the candidate resource set. By the method, the resource utilization rate can be improved.
In one possible design, the preset threshold is determined according to the first beam and/or a second beam, and the second beam is a transmission beam of the second terminal device on the second frequency. By the method, the transmission resources in the same wave beam direction with strong interference can be prevented from being selected, and the transmission performance is improved.
In one possible design, the value of the predetermined threshold is positively correlated with the difference between the angles corresponding to the first beam and the second beam. By the method, the transmission resource in the same wave beam direction with strong interference can be avoided being selected, and the transmission performance is improved.
In one possible design, the type of transmission of the data is unicast or multicast. Because the first terminal device of unicast or multicast has definite receiving and sending devices, and thus has definite receiving and sending directions, the transmission performance can be improved by the above mode.
In one possible design, determining the second resource based on the first resource includes: determining a first time slot in the candidate time slot set of the second frequency based on the time slot in which the first resource is located; excluding the first time slot from the candidate time slot set to obtain a first time slot set; and determining a second resource in the candidate resources corresponding to the first time slot set. In the above manner, by excluding the detected time slot occupied by the transmission on the second frequency and transmitting on the unoccupied time slot, the interference influence caused by the misalignment of the beam direction determination can be reduced.
In one possible design, the transmission type corresponding to the communication on the first resource is multicast or unicast; the transmission type of the data is broadcast. Because the first terminal device is to transmit in the determined beam direction or beam direction subset when performing unicast or multicast transmission; when the broadcast transmission is performed, the first terminal device performs transmission in an omnidirectional beam or a beam scanning manner. The different transmission modes have different beam directions, and cannot realize frequency division multiplexing on the same time slot. Therefore, the time slot occupied by unicast or multicast transmission can be directly filtered out by broadcast transmission. Thereby avoiding the problem of collision of different transmission types when determining the transceiving beams.
In one possible design, the method further comprises: determining transmission parameters for sending data according to the resource occupation information on the resource pool where the first resource is located, wherein the transmission parameters comprise: and one or more of transmission power, transmission bandwidth and modulation and coding mode of transmission data. By the method, resource conflict can be reduced, and communication performance is improved.
In one possible design, the resource occupancy information includes a Channel Busy Ratio (CBR) and/or a channel occupancy ratio (CR).
In one possible design, the method further comprises: determining the resource occupation information in any one of the following manners: measuring resource occupation information of at least one wave beam in the candidate wave beam set on the resource pool to obtain the measurement information of the at least one wave beam, and obtaining the resource occupation information according to the average value of the measurement information of the at least one wave beam; measuring resource occupation information of at least one wave beam in the candidate wave beam set on a resource pool to obtain the measurement information of the at least one wave beam, and then obtaining the resource occupation information according to the measurement information of each wave beam in the at least one wave beam; measuring the resource occupation information of the wave beam expected to be sent or received on the resource pool to obtain the measurement information of the wave beam, and then obtaining the resource occupation information according to the measurement information of the wave beam.
In the above manner, by performing measurement according to each beam, the accuracy of measuring the occupation condition of the resource pool can be improved in the process of selecting and excluding resources based on the beams.
In a fourth aspect, an embodiment of the present application provides a communication apparatus, which may implement the method described in the first aspect, the second aspect, the third aspect, or any possible design thereof. The device comprises corresponding units or means for performing the above-described method. The means comprised by the apparatus may be implemented by software and/or hardware. The apparatus may be, for example, a terminal device, or a component or a baseband chip, a chip system, or a processor that can support the terminal device to implement the method.
Illustratively, the communication device may comprise a processing unit (or processing module), and may further comprise a transceiver unit (or communication module, transceiver module), or any other modular component, which may perform the method described in the first aspect, the second aspect, or the third aspect, or any possible design thereof. When the communication apparatus is a terminal device, the transceiving unit may be a transmitter and a receiver, or a transceiver obtained by integrating a transmitter and a receiver. The transceiver unit may include an antenna, a radio frequency circuit, and the like, and the processing unit may be a processor, such as a baseband chip and the like. When the communication device is a component having the functions of the terminal equipment, the transceiver unit may be a radio frequency unit, and the processing unit may be a processor. When the communication device is a chip system, the transceiving unit may be an input/output interface of the chip system, and the processing unit may be a processor of the chip system, for example: a Central Processing Unit (CPU).
The transceiving unit may be adapted to perform the actions of receiving and/or transmitting in the first aspect or the second aspect or the third aspect or any possible design thereof. The processing unit may be adapted to perform actions other than receiving and sending in the first aspect or the second aspect or the third aspect or any possible design thereof, such as determining a starting point in time of a resource selection window, selecting transmission resources within said resource selection window, etc.
In a fifth aspect, a computer-readable storage medium is provided, which is used for storing computer instructions that, when executed on a computer, cause the computer to perform the first aspect, the second aspect, the third aspect, or any one of the possible designs thereof.
A sixth aspect provides a computer program product comprising instructions for storing computer instructions which, when run on a computer, cause the computer to perform the first aspect or the second aspect or the third aspect or any of its possible designs.
In a seventh aspect, a circuit is provided, the circuit being coupled to a memory, the circuit being adapted to perform the first aspect, the second aspect, the third aspect, or any one of the possible designs thereof. The circuit may comprise a chip circuit.
Drawings
FIG. 1 is a schematic view of a V2X in an embodiment of the present application;
fig. 2 is a schematic diagram of low-frequency millimeter wave communication according to an embodiment of the present disclosure;
fig. 3 is a schematic diagram of a high-frequency millimeter wave according to an embodiment of the present disclosure;
fig. 4 is a schematic architecture diagram of a communication system according to an embodiment of the present application;
fig. 5 is a schematic architecture diagram of a communication system according to an embodiment of the present application;
fig. 6 is a schematic architecture diagram of a communication system according to an embodiment of the present application;
fig. 7 is a block diagram of a communication system according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of a communication device according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of another communication device according to an embodiment of the present application;
FIG. 10 is a schematic view of a scenario according to an embodiment of the present application;
fig. 11 is a flowchart illustrating a communication method according to an embodiment of the present application;
FIG. 12 is a schematic diagram of resource selection according to an embodiment of the present application;
FIG. 13 is a schematic view of a scenario according to an embodiment of the present application;
fig. 14 is a flowchart illustrating a communication method according to an embodiment of the present application;
FIG. 15 is a schematic view of a beam projection according to an embodiment of the present application;
FIG. 16 is a schematic diagram illustrating angular quantization of a beam projection according to an embodiment of the present application;
FIG. 17 is a schematic diagram illustrating angular quantization of a beam projection in accordance with an embodiment of the present application;
fig. 18 is a schematic diagram of angular quantization of a beam projection according to an embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in further detail with reference to the accompanying drawings.
Hereinafter, some terms in the embodiments of the present application are explained so as to be easily understood by those skilled in the art.
1) Terminal equipment, including equipment providing voice and/or data connectivity to a user, in particular, including equipment providing voice to a user, or including equipment providing data connectivity to a user, or including equipment providing voice and data connectivity to a user. For example, may include a handheld device having wireless connection capability, or a processing device connected to a wireless modem. The terminal device may communicate with a core network via a Radio Access Network (RAN), exchange voice or data with the RAN, or interact with the RAN. The terminal device may include a User Equipment (UE), a wireless terminal device, a mobile terminal device, a device-to-device communication (D2D) terminal device, a vehicle-to-all (V2X) terminal device, a machine-to-machine/machine-type communication (M2M/MTC) terminal device, an internet of things (IoT) terminal device, a subscriber unit (subscriber unit), a subscriber station (subscriber station), a mobile station (mobile station), a remote station (remote station), an access point (access point, AP), a remote terminal (remote terminal), an access terminal (access terminal), a user terminal (user terminal), a user agent (user agent), or a user equipment (user device). For example, mobile telephones (otherwise known as "cellular" telephones), computers with mobile terminal equipment, portable, pocket, hand-held, computer-included mobile devices, and the like may be included. Such as Personal Communication Service (PCS) phones, cordless phones, session Initiation Protocol (SIP) phones, wireless Local Loop (WLL) stations, personal Digital Assistants (PDAs), and the like. Also included are constrained devices, such as devices that consume less power, or devices that have limited storage capabilities, or devices that have limited computing capabilities, etc. Examples of information sensing devices include bar codes, radio Frequency Identification (RFID), sensors, global Positioning Systems (GPS), laser scanners, and so forth.
By way of example and not limitation, in the embodiments of the present application, the terminal device may also be a wearable device. Wearable equipment can also be called wearable intelligent equipment or intelligent wearable equipment and the like, and is a general term for applying wearable technology to carry out intelligent design and develop wearable equipment for daily wearing, such as glasses, gloves, watches, clothes, shoes and the like. A wearable device is a portable device that is worn directly on the body or integrated into the clothing or accessories of the user. The wearable device is not only a hardware device, but also realizes powerful functions through software support, data interaction and cloud interaction. The generalized wearable smart device includes full functionality, large size, and can implement full or partial functionality without relying on a smart phone, such as: smart watches or smart glasses and the like, and only focus on a certain type of application functions, and need to be used in cooperation with other devices such as smart phones, such as various smart bracelets, smart helmets, smart jewelry and the like for monitoring physical signs.
While the various terminal devices described above, if located on a vehicle (e.g. placed in or installed in a vehicle, may be considered to be vehicle-mounted terminal devices, also referred to as on-board units (OBUs), for example).
In this embodiment, the terminal device may further include a relay (relay). Or, it is understood that any device capable of data communication with a base station may be considered a terminal device.
In the embodiment of the present application, the apparatus for implementing the function of the terminal device may be the terminal device, or may be an apparatus capable of supporting the terminal device to implement the function, for example, a chip system, and the apparatus may be installed in the terminal device. In the embodiment of the present application, the chip system may be formed by a chip, and may also include a chip and other discrete devices. In the technical solution provided in the embodiment of the present application, a device for implementing a function of a terminal is taken as an example of a terminal device, and the technical solution provided in the embodiment of the present application is described.
2) A network device, for example, including AN Access Network (AN) device, such as a base station (e.g., AN access point), may refer to a device in AN access network that communicates with a wireless terminal device over one or more cells over AN air interface, or a network device in a V2X technology is a Road Side Unit (RSU), for example. The base station may be configured to interconvert the received air frame with an Internet Protocol (IP) packet, and serve as a router between the terminal device and the rest of the access network, where the rest of the access network may include an IP network. The RSU may be a fixed infrastructure entity supporting V2X applications and may exchange messages with other entities supporting V2X applications. The network device may also coordinate attribute management for the air interface. For example, the network device may include an evolved Node B (NodeB) or eNB or e-NodeB in an LTE system or an LTE-a (long term evolution-advanced, LTE-a), or may also include a next generation Node B (gNB) in a fifth generation mobile communication technology (5 g) NR system (also referred to as NR system) or may also include a Centralized Unit (CU) and a Distributed Unit (DU) in a Cloud access network (Cloud RAN) system, which is not limited in the embodiments of the present application.
The network device may also include a core network device including, for example, an access and mobility management function (AMF) or the like. Since the embodiments of the present application mainly relate to an access network, unless otherwise specified, all the network devices refer to access network devices.
In the embodiment of the present application, the apparatus for implementing the function of the network device may be a network device, or may be an apparatus capable of supporting the network device to implement the function, for example, a system on chip, and the apparatus may be installed in the network device. In the technical solution provided in the embodiment of the present application, a device for implementing a function of a network device is taken as an example, and the technical solution provided in the embodiment of the present application is described.
3) V2X is that vehicles and the outside world carry out interconnection and intercommunication, and is the basis and key technology of future intelligent automobile, automatic driving and intelligent transportation system. V2X optimizes the specific application requirements of V2X based on the existing device-to-device (D2D) technology, and needs to further reduce the access delay of V2X devices and solve the problem of resource conflict.
The V2X specifically includes several application requirements, such as vehicle-to-vehicle (V2V), vehicle-to-infrastructure (V2I), vehicle-to-pedestrian (V2P) direct communication, and vehicle-to-network (V2N) communication interaction. As shown in fig. 1. V2V refers to inter-vehicle communication; V2P refers to vehicle-to-person communication (including pedestrians, cyclists, drivers, or passengers); V2I refers to vehicle communication with a network device, such as an RSU, and another V2N may be included in V2I, V2N refers to vehicle communication with a base station/network.
The terms "system" and "network" in the embodiments of the present application may be used interchangeably. "at least one" means one or more, "a plurality" means two or more. "and/or" describes the association relationship of the associated objects, meaning that there may be three relationships, e.g., a and/or B, which may mean: a alone, A and B together, and B alone, wherein A and B may be singular or plural. The character "/" generally indicates that the former and latter associated objects are in an "or" relationship. "at least one of the following" or similar expressions refer to any combination of these items, including any combination of the singular or plural items. For example, at least one (one) of a, b, or c, may represent: a, b, c, a and b, a and c, b and c, or a and b and c, wherein a, b and c can be single or multiple.
And, unless stated to the contrary, the embodiments of the present application refer to the ordinal numbers "first", "second", etc., for distinguishing a plurality of objects, and do not limit the size, content, sequence, timing, priority, degree of importance, etc., of the plurality of objects. For example, the first frequency band and the second frequency band are only used for distinguishing different frequency bands, and do not indicate the difference of frequency ranges, priorities, importance levels, and the like of the two frequency bands.
The foregoing describes some of the noun concepts related to embodiments of the present application, and the following describes some features related to embodiments of the present application.
In NR, there are two transmission modes (modes) regarding resource allocation of sidelink (sidelink), one for allocating a resource mode 1 (mode-1) for a network device and one for selecting a resource mode 2 (mode-2) for a user. In mode-2, the terminal equipment at the sending end carries out interception in an interception time window, and automatically selects resources in a resource selection window according to an interception result to carry out communication.
With the development of communication, in a scenario of low-frequency millimeter waves, a terminal device transmits and receives using a non-directional beam (e.g., a wide beam of 120 degrees, 360 degrees) as shown in fig. 2, and in a scenario of high-frequency millimeter waves, a terminal device transmits and receives using a directional beam (e.g., a narrow beam of 10 degrees, 15 degrees, 20 degrees, etc.) as shown in fig. 3. Directional beams are very different from non-directional beams, e.g. signals transmitted by a transmitter through a directional beam are transmitted to a specific beam direction; when the receiver receives in a specific beam direction through the directional beam, the receiver receives signals in the corresponding receiving direction. In the directional beam, signals of adjacent terminal devices may not be received due to different beam directions used between the adjacent terminal devices. In the non-directional beam, the adjacent terminal device receives the signal of the adjacent terminal device. Therefore, after the directional beam is introduced, how the terminal device performs resource selection is an urgent problem to be solved.
Based on this, embodiments of the present application provide a communication method and apparatus for providing a resource selection scheme based on a directional beam. The method and the device are based on the same inventive concept, and because the principles of solving the problems of the method and the device are similar, the implementation of the device and the method can be mutually referred, and repeated parts are not repeated.
The technical scheme provided by the embodiment of the application can be applied to LTE, NR or 6G protocol frameworks and the like. In particular, the method can be applied to D2D scenes, for example, V2X, LTE-V, V2V and the like in a car networking scene, and the car networking scene may include, but is not limited to, smart driving, smart internet vehicle and the like.
Fig. 4-7 are diagrams illustrating exemplary communication systems between UE1 and UE2 via a sidelink. The UE1 and the UE2 may communicate directly (as shown in fig. 4 to fig. 6) or may communicate through the relay node UE3 (as shown in fig. 7). In the communication system shown in fig. 5, UE1 may also connect to a network device through UE2 for communication. Or, conversely, the network device may communicate with UE1 via UE 2. In the communication systems shown in fig. 4 to 7, the sidelink communication between UE1 and UE2 may be performed under network coverage or under no network coverage.
In the communication systems shown in fig. 4 to 7, UE1 and UE2 perform communication between terminals via a sidelink (sidelink). The terminal device and the network device communicate with each other via a cellular link (uulink). When UE1 and UE2 communicate with each other, the corresponding configuration information, or time-frequency resource during communication, may be sent through the network device. In the communication systems shown in fig. 4-7, the network device is an optional network element.
In the scenarios shown in fig. 4-7, resources for sidelink communications may be based on configuration or scheduling of the network device or may be selected autonomously by the terminal device. In the embodiment of the application, the method and the process for determining the resources based on the autonomous selection mode are mainly performed between the terminal devices under the high frequency (the second frequency). The present application is mainly described with respect to the behavior of a terminal device. Optionally, signaling and/or configuration information provided by the network device may provide certain assistance and functions for terminal device autonomous resource selection. That is, a partially complementary inventive point is provided on the network device.
The terminal devices in fig. 4 to fig. 7 are vehicle-mounted terminal devices, or vehicles, terminal RSUs, telematics BOX (TBOX), chips, and the like, but the terminal devices in the embodiments of the present application are not limited thereto.
The following describes a possible structure of the terminal device with reference to the accompanying drawings.
By way of example, fig. 8 shows a schematic diagram of a possible configuration of the device. The apparatus shown in fig. 8 may be a terminal device, and may also be a chip, a module, a TBOX, or other combined devices, components (or assemblies) with the functions of the terminal device shown in this application, which are applied in the terminal device. The apparatus may include a processing module 810 and may also include a transceiver module 820. The transceiver module 820 may be a functional module, which can perform both the transmitting operation and the receiving operation, for example, the transceiver module 820 may be used to perform all the transmitting operation and the receiving operation performed by the terminal device, for example, when the transmitting operation is performed, the transceiver module 820 may be considered as a transmitting module, and when the receiving operation is performed, the transceiver module 820 may be considered as a receiving module; alternatively, the transceiver module 820 may also be two functional modules, and the transceiver module 820 may be regarded as a general term of the two functional modules, where the two functional modules are a transmitting module and a receiving module, respectively, the transmitting module is configured to complete a transmitting operation, for example, the transmitting module may be configured to perform all transmitting operations performed by the terminal device, the receiving module is configured to complete a receiving operation, and the receiving module may be configured to perform all receiving operations performed by the terminal device.
Illustratively, when the apparatus is a terminal device, the transceiver module 820 may include a transceiver and/or a communication interface. The transceiver may include an antenna, radio frequency circuitry, and the like. A communications interface such as a fiber optic interface. The processing module 810 may be a processor, such as a baseband processor, which may include one or more Central Processing Units (CPUs).
When the apparatus is a component having the functions of the terminal device shown in this application, the transceiver module 820 may be a radio frequency unit, and the processing module 810 may be a processor, such as a baseband processor.
When the apparatus is a chip system, the transceiver module 820 may be an input/output interface of a chip (e.g., a baseband chip), and the processing module 810 may be a processor of the chip system and may include one or more central processing units.
It should be understood that the processing module 810 in the embodiments of the present application may be implemented by a processor or a processor-related circuit component, and the transceiver module 820 may be implemented by a transceiver or a transceiver-related circuit component.
In one implementation, the processing module 810 may be configured to perform all operations performed by the terminal device in the embodiments of the present application, such as processing operations, and/or other processes to support the techniques described herein, such as determining a second resource based on the first resource, processing messages, information, and/or signaling received by the transceiving module 820, and so on. Transceiver module 820 may be used to perform all of the receiving and transmitting operations performed by the terminal device in the embodiments of the present application, and/or other processes for supporting the techniques described herein.
Fig. 9 shows another possible structural diagram of a terminal device. As shown in fig. 9, the terminal device includes a processor, and may further include a memory, a radio frequency unit (or a radio frequency circuit), an antenna, an input/output device, or other structures. The processor is mainly used for processing a communication protocol and communication data, controlling the device, executing a software program, processing data of the software program, and the like. The memory is used primarily for storing software programs and data. The radio frequency unit is mainly used for converting baseband signals and radio frequency signals and processing the radio frequency signals. The antenna is mainly used for receiving and transmitting radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are used primarily for receiving data input by a user and for outputting data to the user. It should be noted that some kinds of terminal devices may not have input/output devices.
When data needs to be sent, the processor performs baseband processing on the data to be sent and outputs baseband signals to the radio frequency circuit, and the radio frequency circuit performs radio frequency processing on the baseband signals and sends the radio frequency signals to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal equipment, the radio frequency circuit receives radio frequency signals through the antenna, converts the radio frequency signals into baseband signals and outputs the baseband signals to the processor, and the processor converts the baseband signals into the data and processes the data. For ease of illustration, only one memory and processor are shown in FIG. 9. In an actual end device product, there may be one or more processors and one or more memories. The memory may also be referred to as a storage medium or a storage device, etc. The memory may be provided independently of the processor, or may be integrated with the processor, which is not limited in this embodiment.
In the embodiment of the present application, an antenna and a radio frequency circuit having a transceiving function may be regarded as a transceiving unit of a terminal device (the transceiving unit may be a functional unit, and the functional unit is capable of implementing a transmitting function and a receiving function, or the transceiving unit may also include two functional units, which are respectively a receiving unit capable of implementing a receiving function and a transmitting unit capable of implementing a transmitting function), and a processor having a processing function may be regarded as a processing unit of the terminal device. As shown in fig. 9, the terminal device includes a processing unit 920, and may further include a transceiving unit 910. A transceiver unit may also be referred to as a transceiver, a transceiving device, etc. A processing unit may also be referred to as a processor, a processing board, a processing module, a processing device, or the like. Optionally, a device in the transceiving unit 910 for implementing a receiving function may be regarded as a receiving unit, and a device in the transceiving unit 910 for implementing a sending function may be regarded as a sending unit, that is, the transceiving unit 910 includes a receiving unit and a sending unit. A transceiver unit may also sometimes be referred to as a transceiver, transceiving circuitry, or the like. A receiving unit may also be referred to as a receiver, a receiving circuit, or the like. A transmitting unit may also sometimes be referred to as a transmitter, or a transmitting circuit, etc.
It is understood that the transceiving unit 910 may correspond to the transceiving module 820, or the transceiving module 820 may be implemented by the transceiving unit 910. The transceiving unit 910 is configured to perform the transmitting operation and the receiving operation of the terminal device in the embodiments shown in this application, and/or other processes for supporting the technology described herein. The processing unit 920 may correspond to the processing module 810, or the processing module 810 may be implemented by the processing unit 920. The processing unit 920 is configured to perform other operations on the terminal device in the embodiments shown in this application, besides transceiving operations, for example, to perform all receiving and transmitting operations performed by the terminal device in the embodiments shown in this application, and/or to support other processes of the techniques described herein.
The network architecture and the service scenario described in the embodiment of the present application are for more clearly illustrating the technical solution of the embodiment of the present application, and do not form a limitation on the technical solution provided in the embodiment of the present application, and it can be known by a person skilled in the art that the technical solution provided in the embodiment of the present application is also applicable to similar technical problems along with the evolution of the network architecture and the appearance of a new service scenario.
In the present embodiment, only the time slot is used as a time unit, and in a specific embodiment, other time units such as a frame, a subframe, a field, a mini-slot, a symbol, a sampling point, and the like may be used, and the time unit is not limited here.
It should be noted that, in this embodiment of the present application, the transmission of the terminal device may be used for the sidelink, and may also be used for the uplink of the cellular link; alternatively, the reception of the terminal device may be used for the side link and also for the downlink of the cellular link. The embodiments of the present application do not limit this.
As an optional scheme, in this embodiment of the application, before the first terminal device and/or the second terminal device performs sidelink transmission, a receiving end and a sending end of the sidelink transmission may obtain configuration information of the first frequency and/or the second frequency. Optionally, the configuration information of the first frequency and/or the second frequency may be indicated or determined through a system message, a Radio Resource Control (RRC) message common to the UEs, or pre-configured signaling, or in a predefined manner.
In a possible implementation manner, the configuration information of the second frequency may configure a plurality of second frequencies, and frequency values corresponding to the plurality of second frequencies may be different.
The application provides a flow diagram of a communication method. The method may be applied in a scenario where there is a first frequency and a second frequency coverage. In this scenario, there may be coverage of other frequencies, which is not limited herein.
Illustratively, the method may be used for sidestream communication scenarios. For simplicity of description, as shown in fig. 10, the embodiment of the present application is described by taking a V2X application scenario as an example. In fig. 10, V2X communication between different vehicles may be performed via a resource (e.g., carrier) on a first frequency. V2X communication can also be performed between different vehicles through resources (such as carrier waves) on a second frequency. In fig. 10, the elliptical areas schematically represent coverage area and range only at a first frequency, and the narrow beam directions schematically represent the directions of beam transmission or reception at a second frequency.
In the embodiment of the application, the second frequency is higher than the first frequency. Some exemplary illustrations of the first frequency and the second frequency are given below.
In one example, the first frequency and the second frequency may be frequency points when the frequency takes a specific value, may be a frequency range or a frequency band, or the like. In this example, the first frequency and the second frequency may be distinguished by a preset frequency value. For example, the first frequency has a center frequency value lower than a first preset frequency value, and the second frequency has a center frequency value higher than a second preset frequency value. For example, the first frequency may refer to a frequency band below 6GHz, and the second frequency may refer to a frequency band above 6 GHz. Alternatively, the first frequency may refer to a frequency band below 7.125GHz, and the second frequency may refer to a frequency band above 7.125 GHz. Alternatively, the first frequency and the second frequency may be distinguished by the relative magnitude of the center frequency value of the first frequency and the center frequency value of the second frequency. For example, the value of the center frequency of the first frequency is lower than the value of the center frequency of the second frequency. Alternatively, the frequency band to which the first frequency belongs may be described by using FR1, and the frequency band to which the second frequency belongs may be described by using FR 2.
In another example, the first frequency and the second frequency may also be carrier waves. In this example, the first frequency may also be referred to as a first carrier and the second frequency may also be referred to as a second carrier.
In yet another example, the first frequency and the second frequency may also be portions of the bandwidth. In this example, the first frequency may also be referred to as a first bandwidth portion and the second frequency may also be referred to as a second bandwidth portion.
In yet another example, the first frequency and the second frequency may also be a resource pool. In this example, the first frequency may also be referred to as a first resource pool and the second frequency may also be referred to as a second resource pool.
In another example, the first frequency and the second frequency may also be subchannels. In this example, the first frequency may also be referred to as a first subchannel and the second frequency may also be referred to as a second subchannel.
In yet another example, the first frequency and the second frequency may also be resource blocks. In this example, the first frequency may also be referred to as a first resource block and the second frequency may also be referred to as a second resource block.
As an illustrative example, the first frequency may be transmitted based on a non-directional beam and the second frequency may be transmitted based on a directional beam.
In the embodiments of the present application, a beam refers to a description of a transmission electromagnetic wave or a reception gain having a specific shape in space. Specifically, the transmission beam refers to a shape (including a size and a direction) formed in space by the electromagnetic wave transmitted from the transmission device, and they are determined by the transmission antenna. A receive beam refers to a reception method and method in which the reception gain has a specific shape in space.
Alternatively, the beam may be formed by beamforming. Beamforming, also called Beamforming, spatial filtering, is a signal processing technique that uses a sensor array to directionally transmit and receive signals. Beamforming techniques allow signals at certain angles to achieve constructive interference and signals at other angles to achieve destructive interference by adjusting parameters and/or amplitude parameters of the elements of the phased array. Beamforming can be used for both signal transmitting and receiving ends.
It should be understood that fig. 10 is a schematic diagram, and does not limit the terminal devices to vehicles, nor the number of terminal devices.
The following describes a resource selection process of a terminal device by taking two terminal devices (hereinafter referred to as a first terminal device and a second terminal device) as an example, where the second terminal device is any one terminal device that performs resource selection. It should be understood that the interaction flow between the other terminal device and the second terminal device is similar to the interaction flow between the first terminal device and the second terminal device, and in addition, if there are other terminal devices in the system, the second terminal device may also select resources according to the resources of the other terminal devices in addition to the resources of the first terminal device when performing resource selection, which is similar to the way in which the second terminal device performs resource selection according to the resources of the first terminal device, and the description of this application is not repeated.
As shown in fig. 11, the method includes:
s1101, the first terminal device determines a first resource for transmitting data on a second frequency.
Wherein the first resource may include: the resource occupied by the current transmission of the first terminal equipment on the second frequency and/or the resource reserved by the transmission of the first terminal equipment after the current transmission on the second frequency.
Illustratively, step S1101 may be performed by the processing module 810 of the first terminal device.
S1102, the first terminal device generates first information, where the first information is used to indicate a first resource of the first terminal device on a second frequency.
Wherein the first information may include indication information of frequency domain resources of the first resources. Optionally, the unit (or granularity) of the frequency domain resource is signaled or predefined. Optionally, the unit (or granularity) of the frequency domain resource is determined based on the size of the sub-band configured on the second frequency. Illustratively, the unit (or granularity) of the frequency domain resource may be any one of a carrier, a bandwidth part, a resource pool, a subchannel, and a resource block.
Optionally, the first information may further include information indicating the first resource and at least one of: the first terminal device sends the beam direction information of the beam on the second frequency, the transmission type indication information of the communication on the first resource, the priority information of the data on the first resource, the position information of the first terminal device, the source identification and the destination identification.
Optionally, the first information is carried in a control signaling or a channel. For example, for the sidelink, the first information is carried in the Sidelink Control Information (SCI) of the first level and/or the SCI of the second level. For example, for the sidelink, the first information is carried in a Physical Sidelink Control Channel (PSCCH) channel or a physical sidelink shared channel (PSCCH) channel.
Taking the example that the first information is carried in the SCI, the first terminal device may indicate the frequency corresponding to the first resource through a format or a field of the SCI. Optionally, the first information may also be carried in other similar control channels or signaling, such as an uplink control signaling in the Uu port, which is not limited in this embodiment.
In one implementation, assuming that the configuration information of the second frequency configures one second frequency, the SCI may indicate that the first resource corresponds to the second frequency by carrying the first information in field 1, where carrying the first information in field 1 indicates that the resource on the second frequency is indicated. In this way, although the first information only indicates the resource, since the resource indicated by the field 1 is configured or preconfigured in advance to correspond to the second frequency, after receiving the first information, the second terminal device may determine, according to the field 1 where the first information is located, not only the first resource but also the second frequency corresponding to the first resource.
In another implementation, it is assumed that the configuration information of the second frequency configures multiple second frequencies, and the SCI may indicate the currently used second frequency through different fields or different values of the fields or different formats. For example, the configuration information of the second frequency configures four second frequencies, which are respectively f 2-1 、f 2-2 、f 2-3 、f 2-4 When field 1 of SCI is 00, f is indicated 2-1 When field 1 of SCI is 01, f is indicated 2-2 When field 1 of SCI is 10, f is indicated 2-3 When field 1 of SCI is 11, f is indicated 2-4 。
In another implementation, assuming that the configuration information of the second frequency configures multiple second frequencies, the SCI may indicate each frequency group through different fields or different values of the fields or different formats, and the like, where one frequency group includes one or more second frequencies. For example, the configuration information of the second frequencies configures four second frequencies, which are respectively f 2-1 、f 2-2 、f 2-3 、f 2-4 When field 1 of SCI is 0, f is indicated 2-1 And f 2-2 When field 1 of SCI is 1, f is indicated 2-3 And f 2-4 。
Illustratively, step S1102 may be performed by the processing module 810 of the first terminal device.
S1103, the first terminal device sends the first information on the first frequency. Accordingly, the second terminal device receives the first information on the first frequency.
In a possible embodiment, the first terminal device may transmit the first information on the first frequency when the first condition is satisfied. Wherein the first condition comprises one or more of:
receiving configuration information, wherein the configuration information is used for indicating that the first terminal equipment enables the transmission of the first information on the first frequency;
detecting that a channel occupancy on a resource pool of a second frequency is above a first threshold on the second frequency;
detecting that a channel busy ratio on a resource pool of a second frequency is above a second threshold on the second frequency;
detecting that a channel quality on a resource pool of a second frequency is below a third threshold on the second frequency;
the priority of the data is higher than the fourth threshold;
the acknowledgement message of the data includes at least one Negative Acknowledgement (NACK);
the distance between the first terminal equipment and the second terminal equipment is greater than a fifth threshold;
the first terminal device is configured with a power save transmission mode.
In step S1103, the first terminal device may transmit the first information through Sidelink Control Information (SCI). Accordingly, the second terminal device may perform a blind detection of the SCI on the first frequency. After receiving the SCI, the second terminal device may obtain the first information from the SCI. Thereby, the resource occupation and/or resource reservation situation of other terminal devices on the second frequency can be obtained.
In this embodiment, in order to support the cooperation of the first frequency and the second frequency, the terminal device (e.g., the first terminal device, the second terminal device) needs to have a function or capability of supporting the cooperation of the first frequency and the second frequency. Optionally, the network device may configure the first terminal device and the second terminal device to support the first frequency and the second frequency coordination function. Wherein the coordination of the first frequency and the second frequency, the first frequency and the second frequency coordination function may be understood as indicating the resource on the second frequency on the first frequency. Alternatively, the cooperative function of the first frequency and the second frequency may be the capability of the terminal device. The terminal device needs to report to the other party or the network device whether the terminal device supports the "cooperative function of the first frequency and the second frequency".
Optionally, the first terminal device may further receive, based on the second frequency, at least one third information in a timeslot included in the second set, where the second set includes at least one timeslot except for a timeslot corresponding to the first resource, and the third information is used to indicate a resource of the corresponding terminal device on the second frequency, so that resources reserved and/or occupied by other terminal devices on the second frequency may be obtained. Where each resource may correspond to a signal quality.
Optionally, the signal quality corresponding to the resource may be a channel quality measured by the second terminal device on a received control channel carrying the third information, or may be a channel quality measured by the second terminal device on a data channel scheduled or indicated by the received third information. Alternatively, the signal quality may be measured based on information or reference signals of the control channel and/or the data channel. Alternatively, the signal quality may be one or more of Reference Signal Receiving Power (RSRP), reference Signal Receiving Quality (RSRQ), and Received Signal Strength Indicator (RSSI). For example, the step S1103 of "sending the first information" may be performed by the transceiver module 820 of the first terminal device. The "receiving the first information" may be performed by the transceiver module 820 of the second terminal device.
S1104, the second terminal device determines a second resource based on the first resource.
Wherein the second resource is for transmitting data on a second frequency.
Illustratively, step S1104 may be performed by the processing module 810 of the second terminal device. In one implementation, the second terminal device may implement S1104 through the following steps A1 to A3:
a1, a third resource is determined in the candidate resource set of the second frequency based on the first resource.
Specifically, the second terminal device may determine the third resource in the candidate resource set of the second frequency according to the time slot where the first resource is located and the reservation period indicated in the first information.
And A2, excluding the third resource from the candidate resource set to obtain the first resource set.
Specifically, the second terminal device may exclude the third resource from the candidate resource set when at least one of the following conditions is satisfied: the signal quality corresponding to the first information exceeds a first preset threshold; and the signal quality corresponding to the second information exceeds a second preset threshold. Optionally, the second information is received on a second frequency, and the second information includes indication information of the first resource. Optionally, the first preset threshold and/or the second preset threshold are configured or predetermined by signaling. Optionally, the signaling is configured on a resource pool where the first frequency and/or the second frequency is located.
Optionally, the signal quality corresponding to the first information may be a channel quality measured by the second terminal device on a received control channel carrying the first information, or may be a channel quality measured by the second terminal device on a data channel scheduled or indicated by the received first information. Alternatively, the signal quality may be measured based on information or reference signals of the control channel and/or the data channel. Optionally, the signal quality may be one or more of RSRP, RSRQ, RSSI.
The method can directly determine the candidate resource on the high frequency (namely the second frequency) according to the measurement on the low frequency (namely the first frequency), thereby greatly reducing the measurement time and the measurement power consumption on the high frequency.
In some embodiments, the second information may be received by the second terminal device using the first beam on the second frequency. Optionally, the first beam may be determined according to at least one of the following: device identification information of the second terminal device and/or the third terminal device; position information of the second terminal device and position information of the third terminal device; the first information comprises a source identification and/or a destination identification; the transmission type used for sending data; a beam direction of a transmit beam of the first terminal device on the second frequency; a set of candidate beams, the set of candidate beams comprising at least one beam; the third terminal device is a terminal device that communicates with the second terminal device at the second frequency, and it should be noted that the third terminal device and the first terminal device may be the same terminal device or different terminal devices. The candidate beam set may include all beams pointing in the spatial direction, may also include beams in the direction of the signaling configuration, may also include the best beam and the backup beam pointing to the receiving device (i.e., the third terminal device), or may also be a subset including the best beam pointing to the receiving device (i.e., the third terminal device).
In an embodiment where the first beam is determined according to the location information of the second terminal device and the location information of the third terminal device, the first beam direction may be directed to a direction of the third terminal device, that is, the beam direction of the first beam may coincide with a direction of a beam directed to the third terminal device. By the method, the measured interference state is the same as the measurement state when the third terminal device receives the interference state, and therefore the measurement accuracy is improved.
In embodiments where the first beam is determined from the candidate beam set, the beams in the candidate beam set may be used for SCI detection and RSRP measurement in turn. In this way, by performing measurement for a plurality of directions, candidate beams for resource selection can be increased, and thus reliability of the selected resource in the spatial direction can be increased.
And A3, determining a second resource in the first resource set.
Specifically, the second terminal device may determine the second resource in the first resource set when the number of resources in the first resource set is greater than the first threshold value. Or, the second terminal device may also determine the second resource in the first resource set when the number of resources in the first resource set is smaller than the second threshold and the number of resources in the first resource set is greater than the number of resources in the second resource set.
By this way, the candidate resource on the second frequency can be determined according to the measurement on the first frequency, thereby greatly reducing the measurement time and the measurement power consumption on the second frequency.
Or, the second terminal device may also determine, when the number of resources in the first resource set is smaller than the first threshold and the number of resources in the first resource set is smaller than the number of second resources, a part of resources of the second resources in the first resource set, and determine remaining resources of the second resources in the second resource set, where the second resource set is a complement of the first resource set in the candidate resource set. Alternatively, the second resource set S2 may be a complement of the first resource set S1 in the candidate resource set Sa as follows: s2= Sa-S1. I.e. the set of elements left after all elements in the S1 set have been removed from the set Sa.
In this way, the candidate resource on the second frequency can be preferentially selected according to the measurement on the first frequency, so that the measurement time and the measurement power consumption on the second frequency can be greatly reduced.
In this implementation, if the system (e.g., the network device) configures or activates the cooperative function of the first frequency and the second frequency, the second terminal device may perform decoding detection of the PSCCH and measure corresponding energy on the third resource on the second frequency according to the third resource obtained in step A1. In another implementation manner, the second terminal device may also implement S1104 through the following steps B1 to B3:
and B1, determining the first time slot in the candidate time slot set of the second frequency based on the time slot in which the first resource is positioned.
And B2, excluding the first time slot from the candidate time slot set to obtain a first time slot set.
And B3, determining a second resource in the candidate resources corresponding to the first time slot set.
In the above implementation, the transmission type corresponding to the communication on the first resource may be different from the transmission type of the data on the second resource. Optionally, in this application, the transmission type is unicast, multicast or broadcast.
Illustratively, when the second terminal device detects SCI and measures energy, if it finds that there is a slot occupied and reserved by other terminal devices, the slot is excluded. The second terminal device only selects the unoccupied time slot, so that the interference influence caused by the fact that the beam direction is determined out of time can be reduced, the second terminal device can select resources with less interference in the mode, and the communication performance is improved. In the foregoing implementation manner, by excluding the time slot occupied by the transmission on the detected second frequency and transmitting on the unoccupied time slot, the interference influence caused by the misalignment of the beam direction determination can be reduced.
In another implementation manner, as shown in fig. 12, the second terminal device may also implement S1104 through the following steps C1 to C5:
and C1, receiving at least one piece of third information in a time slot included in a second set based on a second frequency, wherein the second set includes at least one time slot except for the time slot corresponding to the first resource, and the third information is used for indicating the resource of the corresponding terminal equipment on the second frequency.
And C2, determining a fourth resource in the candidate resource set of the second frequency according to the resource indicated by the at least one third information.
Specifically, the second terminal device may determine the fourth resource in the candidate resource set of the second frequency according to the time slot where the resource indicated by the third information is located and the reservation period indicated in the third information.
And C3, determining a third resource in the candidate resource set based on the first resource.
Step C3 may refer to step A1, which is not described herein again.
And C4, excluding the third resource and the fourth resource from the candidate resource set to obtain a third resource set.
And C5, determining the second resource in the third resource set.
Illustratively, like the prior art, regardless of the transmission beam direction of the detected resource, whether the occupied resource is available or not is determined according to the union S2 of the detection results on the first frequency and the second frequency (i.e., the third resource and the fourth resource) by the threshold of the signal quality on the corresponding resource. All available resources are taken as candidate resources. In the mode, the cleanest candidate resource can be selected as far as possible by completely detecting all resources without considering the beam direction, so that the system performance is improved.
By the method, the probability of resource conflict can be reduced, the accuracy of resource selection is improved, and the system performance can be improved.
Three ways of determining the second resource are described above. In the process of determining the second resource, a resource that is semi-persistent or is reserved to the maximum may be selected as the second resource from a time m, where the time m is a time of resource re-evaluation or resource pre-occupation evaluation.
Optionally, after determining the second resource, the second resource may be re-evaluated and preempted.
For example, the second terminal device may determine whether the second resource is temporarily preempted or occupied by other terminal devices on the first beam. If so, the resources occupied by other terminal devices with higher priority can be excluded from the second resources. By the method, whether the selected resources in the beam transmitting direction are clean or not is further confirmed before transmission, so that resource conflict can be further reduced, and the transmission performance in the corresponding beam transmitting direction is ensured.
Further, the second terminal device may determine whether resource reselection is required after re-evaluating and preempting evaluating the second resource. If necessary, the resource selection can be performed again, and the selection process is similar to the method described in fig. 11 and will not be described again here. In one embodiment, the second terminal device may determine whether to perform resource reselection according to the size of the resource remaining after the second resource is subjected to the re-execution evaluation and the preemption evaluation, for example, if the remaining resource is smaller than a threshold value, the resource reselection may be performed.
S1105, the second terminal device transmits data on the second frequency using the second resource.
Illustratively, step S1105 may be performed by the processing module 810.
For example, the second terminal device may transmit data to the third terminal device using the second resource on the second frequency using the first beam. In fig. 11, only the third terminal device and the first terminal device are shown as different terminal devices, but this is not limited in this embodiment of the present disclosure.
The second terminal device may also transmit indication information indicating the second resource on the second frequency on the first frequency and/or the second frequency. For example, the first terminal device may indicate the second resource on the second frequency through the SCI on the first frequency, and may also transmit indication information indicating the second resource on the second frequency.
The manner in which the second terminal device sends the indication information on the first frequency may refer to the manner in which the first terminal device sends the first information on the first frequency, and details are not repeated here. The manner of sending the indication information on the second frequency by the second terminal device may be: the indication is sent on the second frequency through the SCI.
By the method, other terminal equipment can acquire resource reservation of the second terminal equipment on the second frequency through the first frequency and/or the second frequency.
For example, the second terminal device may transmit data on the carrier of the second frequency in the selected resource according to the corresponding beam direction (e.g. the first beam), and make a reservation for the corresponding data. Optionally, if the second terminal device supports the cooperation of the first frequency and the second frequency, the second terminal device still needs to send the resource reservation information (i.e. the above indication information) on the first frequency and/or the second frequency. That is, on the first frequency, the second terminal device needs to indicate the resource reservation information (i.e., the above-mentioned indication information) on the second frequency through the SCI. Optionally, the second terminal device may also make indication information of corresponding resource reservation on the second frequency. The second terminal device sends out the information of the reserved resource determined by the second terminal device on the first frequency, so that other terminal devices can quickly detect the resource reservation on the second frequency through the first frequency.
Optionally, the second terminal device may further determine whether to perform resource reselection, and if so, may perform resource reselection again, where the selection process is similar to the method described in fig. 11, and is not described here again. If not, the selected resources may continue to be used for transmission.
In the embodiment of the present application, by adding the process related to the corresponding processing beam and the process of cooperating the first frequency and the second frequency, the indication of resource reservation on the second frequency can be quickly and effectively implemented, for example, beam scanning is not needed when the reservation made for the second frequency is detected on the first frequency, so that the duration of SCI detection on the second frequency is shortened, and the time for selecting resources on the second frequency is shortened. In addition, the accuracy of the resource selection sensing process can be further improved, for example, beam scanning is not needed on the first frequency, control information is not easy to leak, and the system performance during working on high frequency is improved.
By the scheme provided by the embodiment of the application, the indication of resource reservation on the second frequency can be quickly and effectively realized, and the beam scanning can be omitted by indicating the resource on the second frequency on the first frequency, so that the duration of SCI detection can be shortened, and the time for selecting the resource can be further shortened. And compared with the beam scanning mode, the possibility of missing the first information can be reduced, so that the system performance when the system works on the second frequency can be improved.
The foregoing describes a process in which the second terminal device performs resource selection based on the first information. The manner of indicating the first information will be described below.
In the prior art, a first-level SCI and a second-level SCI may be included in one slot. The first-level SCI is used to indicate resource reservation information, and the format of the second-level SCI. For example, the content of the first level SCI may include one or more of the following information: a priority of a physical sidelink shared channel (pscch) scheduled, which may be indicated by 3 bits; frequency domain resource allocation (frequency resource allocation); time domain resource allocation (time resource assignment), which may be indicated by 5 bits or 9 bits; a demodulation reference signal (DMRS) pattern of the psch; second level SCI format, which information may be indicated by 2 bits; second level SCI rate offset, which information may be indicated by 2 bits; the number of PSSCH DMRS ports, which information can be indicated by 1 bit; modulation and Coding Scheme (MCS), which may be indicated by 5 bits; the MCS table indicates that the information can pass through 0-2 bits, and the bit number of the information can depend on the number of the MCS tables allowed to be used in the resource pool; a Physical Sidelink Feedback Channel (PSFCH) symbol number, wherein if a PSFCH period is 2 or 4 slots, the information may be indicated by 1 bit, otherwise the information may be 0 bit; a resource reservation period (resource reservation period), which may be indicated by 4 bits; reserved bits: 2-4 bits, the specific number of bits may be configured or preconfigured by the network, for example, the values of the reserved bits are all set to 0.
In the embodiment of the present application, when the first information on the first frequency is used to indicate the resource on the second frequency, the first information may be indicated by the first-level SCI on the first frequency. To improve compatibility, the first terminal device may transmit fifth information on the first frequency, the fifth information indicating: the first-level SCI carrying the fifth information is used to indicate the first information. In one implementation, the fifth information may be carried in at least one of the following fields in the first level control information: a first field for indicating a second level control information format, a second field for indicating a modulation and coding scheme, MCS, a third field for indicating an MCS table, a reserved field.
Taking the first field as an example, in the prior art, a value of 00 for the first field may represent SCI 2-a, a value of 01 for the first field may represent SCI 2-B, and 10 and 11 are reserved states for future versions. In the embodiment of the present application, a first field with a value of 10 or 11 may be used to indicate that the first-level SCI is used to indicate the first information, that is, indicate the fifth information.
Taking the second field as an example, in the prior art, the value range of the second field is a value from 0 to 28, and when the value of the second field is 29, 30, and 31, the second field is not defined. In the embodiment of the present application, the second field with a value of 29 or 30 or 31 may be used to indicate that the first-level SCI is used to indicate the first information, i.e., indicate the fifth information.
Taking the third field as an example, in the prior art, when the third field includes 2 bits, 11 is in a reserved state. In this embodiment, a third field with a value of 11 may be used to indicate that the first-level SCI is used to indicate the first information, that is, to indicate the fifth information.
Taking the reserved field as an example, in the embodiment of the present application, the first-level SCI may be indicated by the reserved field whose value is greater than 0 to indicate the first information, that is, to indicate the fifth information.
Optionally, the first field, the second field, the third field, and the reserved field may indicate one or more of the following information in addition to the fifth information:
priority information of traffic on a second frequency;
time domain resource indication information of the reserved time slot on the second frequency, which may indicate the number of the time slot on the second frequency, and may also indicate an offset value relative to the time slot on the first frequency for transmitting the first information, for example, the time domain resource indication information may be included in the first information, or may be included in the control information together with the first information;
frequency domain resource reservation information on a second frequency, wherein the size of the subband on the second frequency can be configured through signaling, in this way, the resource position on the frequency domain can be determined according to the configured subband size and the frequency domain resource reservation information, and for example, the frequency domain resource reservation information can be included in the first information or can be included in the control information together with the first information;
transmitting beam direction indication information, which may indicate a transmitting beam direction of the first terminal device;
transmitting location information (i.e. location information of the first terminal device) and/or receiving location information (i.e. location information of a terminal device communicating with the first terminal device using the first resource);
a source identifier of the service on the second frequency, and a destination identifier of the service on the second frequency;
and transmitting type information on the service on the second frequency, wherein the transmission type comprises unicast, multicast or broadcast.
By the method, the resource reservation made for the second frequency can be transmitted on the first frequency, the compatibility with the old function can be realized, and the use efficiency of the resource on the first frequency can be improved.
As an optional scheme, part or all of the information may also be indicated in the second-level SCI, a media access control element (MAC CE), an RRC, or a message sent by the network device, and the like, which is not limited in this application.
The embodiment of the present application further provides another communication method, which may be applied in a scenario with coverage of only the second frequency, or in a scenario with coverage of both the first frequency and the second frequency. In this scenario, there may be coverage of other frequencies, which is not limited herein. The first frequency and the second frequency may refer to the description related to the method in fig. 11, and are not repeated here.
For example, as shown in fig. 13, the roadside station RSU communicates with two nearest vehicles UE1 and UE2 with a certain downward beam, and other UEs (UE 3 to UE 6) communicate with each other on the ground plane through the corresponding beams. Different beam directions have strong directivity to ensure that a target receiver can receive corresponding signals, but the target receiver only has energy leakage generated by beam side lobes with certain size. For example, UE2 receives signals transmitted from UE3 in directional beams, and also receives signals transmitted to UE3 by UE6 with a certain size. However, signals transmitted by UE6 to UE4 in directional beams have a substantially lower reach to UE2 (because it is not the main lobe of the beam that is directed towards UE 2).
It should be understood that fig. 13 is a schematic diagram, and does not limit the terminal devices to vehicles and road side stations RSUs, and does not limit the number of terminal devices.
The following describes a resource selection process of a terminal device by taking two terminal devices (hereinafter referred to as a first terminal device and a second terminal device) as an example, where the first terminal device is any one terminal device that performs resource selection. It should be understood that the interaction flow between the other terminal devices and the first terminal device is similar to the interaction flow between the first terminal device and the second terminal device, and in addition, if there are other terminal devices in the system, the first terminal device may also select resources according to the resources of the other terminal devices in addition to the resources of the second terminal device when performing resource selection, which is similar to the way in which the first terminal device performs resource selection according to the resources of the second terminal device, and the description of this application is not repeated.
As shown in fig. 14, the method includes:
s1301, the first terminal device determines a first beam at a second frequency.
As an example, the first beam may be determined according to at least one of:
the position information of the first terminal device and the position information of a third terminal device, where the third terminal device is a terminal device that communicates with the first terminal device at a second frequency, it should be noted that the third terminal device and the second terminal device may be the same terminal device or different terminal devices;
a source identifier and/or a destination identifier of the first information;
a transmission type of a communication on a first resource;
a beam direction of a transmit beam of the second terminal device on a second frequency;
the candidate beam set may include all beams pointing in a spatial direction, may also include beams in a direction configured by signaling, may also include an optimal beam pointing to the receiving device (i.e., the third terminal device) and a backup beam, and may also be a subset including the optimal beam pointing to the receiving device (i.e., the third terminal device).
In an embodiment in which the first beam is determined according to the location information of the first terminal device and the location information of the third terminal device, the first beam direction may be directed to a direction of the third terminal device, that is, the beam direction of the first beam may coincide with a direction of a beam directed to the third terminal device. For example, for unicast service, the first terminal device has a definite receiving end in the transmission process, so the first terminal device has a definite receiving and transmitting direction. In the process of resource selection, the first terminal device may align the respective receive beam direction (i.e. the first beam) with the transmit beam (i.e. the beam from which the data is transmitted) direction.
By the method, the measured interference state is the same as the measurement state when the third terminal device receives the interference state, and therefore the measurement accuracy is improved.
In embodiments where the first beam is determined from the candidate set of beams, the beams in the candidate set of beams may be used to take turns for SCI detection and RSRP measurement. For example, for a broadcast service, the first terminal device does not determine whether there is a receiving end around, and the location of the receiving end. Therefore, for the broadcast service, the first terminal device may transmit data in a beam scanning manner to each direction. For the broadcast service, when the first terminal device performs the measurement of the resource selection, the first terminal device may perform the receiving and detecting in the beam scanning manner, and may not perform the receiving and detecting in the fixed beam. For example, for a multicast service, a first terminal device may send a signal to a group of receivers during transmission, where the group of receivers may be located in each possible direction with respect to the first terminal device. Therefore, for the multicast service, the first terminal device may align different receiving ends in a time division manner for the multicast service based on a candidate beam set, where the candidate beam set may be aligned with the receiving ends. Alternatively, the possible positions of the receiving end are not distinguished, and the receiving and the detecting can be performed in a beam scanning mode in a broadcasting mode. For multicast services, the first terminal device cannot receive and detect with a fixed beam when performing the measurement of resource selection.
In this way, by performing measurement for a plurality of directions, candidate beams for resource selection can be increased, and thus reliability of the selected resource in the spatial direction can be increased.
Exemplarily, step S1301 may be performed by the processing module 810 of the first terminal device.
S1302, the first terminal device detects first information on a second frequency by using a first beam, where the first information is used to indicate a first resource of the second terminal device on the second frequency.
Optionally, the first information may further include beam indication information, where the beam indication information is used to indicate a direction of a transmission beam of the second terminal device in a preset coordinate axis. In one implementation, the second terminal device may periodically indicate the direction of the transmission beam. The direction of the transmission beam may be based on a horizontal plane, a vertical plane, or both a horizontal plane and a vertical plane. As an example, the beam indication information may include: beam indication information in the horizontal direction and/or the vertical direction. Illustratively, fig. 15 shows an angular schematic of a beam projected onto a horizontal plane and a vertical plane, respectively. Fig. 16 shows a schematic diagram of angular quantization on a vertical plane, taking 90 degrees as an example. Fig. 17 shows a schematic diagram of quantizing all angles using 3 bits for 360-degree angles on a horizontal plane. Fig. 18 shows a schematic diagram of quantizing all angles using 3 bits for 180-degree angles on a horizontal plane.
As an example, the beam indication information may be a first Reference Signal (RS) with which the beam has a quasi-co-location (QCL) relationship, or a QCL relationship in the direction of the received beam.
By the method, the first terminal equipment can judge the influence on the transmission of the first terminal equipment when receiving data according to the beam indication information of the second terminal equipment.
In one implementation, if the second terminal device is transmitting unicast, the second terminal device may periodically indicate its spatial beam direction.
And the second terminal equipment for unicast transmission uses the control signaling to indicate the current transmission beam direction according to the coordinate axis agreed by the protocol or predefined coordinate axes. By indicating the beam direction of unicast current transmission, the receiving device (such as a first terminal device) can judge the influence of other unicast, multicast or broadcast modes on the transmission of the receiving device according to the transmitting beam direction of other terminal devices (such as a second terminal device).
Optionally, when the transmission type of the data is broadcast, a specific value (e.g., a third preset state) of the beam indication information may be used to indicate an omni-directional or beam scanning transmission direction. For example, for 3 bits of beam indication information, 000 or 111 may be used for indication. When the transmission type of the data is unicast, a specific value (e.g., a first preset state) of the beam indication information may be used to indicate the beam direction. For example, for 3 bits of beam indication information, 001-100 may be used to indicate different beam directions. When the transmission type of the data is multicast, a specific value (e.g., a second preset state) of the beam indication information may be used for indication. For example, for 3-bit beam indication information, 110 or the like may be used to indicate a beam direction.
Optionally, any value of the beam indication information may also be used for indication, in this way, it may be indicated in the transmission type field that the currently-made transmission is a broadcast transmission or a unicast transmission or a multicast transmission, where the transmission type field may be included in the first information. And when the other terminal equipment determines that the transmission type is broadcasting, the beam indication information of the first terminal equipment is ignored or understood in an omnidirectional or beam scanning mode. In the above manner, by indicating the direction of the transmission beam, other terminal devices can accurately obtain the beam direction of the interference source, thereby avoiding selecting a transmission resource in the strong interference same beam direction, and improving the transmission performance.
Illustratively, step S1302 may be performed by the processing module 810 of the first terminal device.
S1303, the first terminal device determines a second resource according to the first resource, where the second resource is used for the first terminal device to send data on a second frequency.
Illustratively, step S1303 may be performed by the processing module 810 of the first terminal device.
In one implementation manner, the first terminal device may implement S1303 through the following steps D1 to D3:
and D1, determining a third resource in the candidate resource set of the second frequency based on the first resource.
Specifically, the first terminal device may determine the third resource in the candidate resource set of the second frequency according to the time slot where the first resource is located and the reservation period indicated in the first information.
And D2, excluding the third resource from the candidate resource set to obtain the first resource set.
Specifically, the first terminal device may exclude the third resource from the candidate resource set when at least one of the following conditions is satisfied: the signal quality corresponding to the first information exceeds a preset threshold.
The preset threshold may be determined according to the first beam and/or a second beam, where the second beam is a transmission beam of the second terminal device on the second frequency. For example, the value of the preset threshold may be positively correlated with the difference between the angles corresponding to the first beam and the second beam. For example, for unicast service, when the first terminal device performs resource exclusion, the preset threshold for resource exclusion may be associated to different beam directions. Alternatively, the preset threshold for exclusion is associated with the angular difference between the transmit beam direction of the second terminal device and the receive beam direction of the first terminal device (i.e., the first beam). The smaller the difference is, the lower the preset threshold for resource exclusion is. In this way, resources corresponding to beams having the same direction as the reception beam of the first terminal device can be preferentially excluded.
Alternatively, the preset threshold may also be associated with a service priority and/or an idle state value of the resource pool when the second terminal device transmits the data packet.
By the method, the transmission resources in the same wave beam direction with strong interference can be prevented from being selected, and the transmission performance is improved.
And D3, determining a second resource in the first resource set.
Specifically, the first terminal device may determine the second resource in the first resource set when the number of resources in the first resource set is greater than the threshold value. Or, the first terminal device may also determine the second resource in the first resource set when the number of resources in the first resource set is smaller than the threshold value and the number of resources in the first resource set is greater than the number of the second resource.
In this way, the candidate resource on the second frequency can be directly determined according to the measurement on the first frequency, so that the measurement time and the measurement power consumption on the second frequency can be greatly reduced.
Or, the first terminal device may also determine, when the number of resources in the first resource set is smaller than the threshold value and the number of resources in the first resource set is smaller than the number of second resources, a part of resources of the second resources in the first resource set, and determine remaining resources of the second resources in the second resource set, where the second resource set is a complement of the first resource set in the candidate resource set.
In this way, the candidate resource on the second frequency can be preferentially selected according to the measurement on the first frequency, and thus the measurement time and the measurement power consumption on the second frequency can be greatly reduced.
Optionally, in the above embodiment, the transmission type of the data of the first terminal device on the second frequency may be unicast or multicast.
In another implementation manner, the first terminal device may implement S1303 through the following steps E1 to E3:
and E1, determining the first time slot in the candidate time slot set of the second frequency based on the time slot in which the first resource is positioned.
And E2, excluding the first time slot from the candidate time slot set to obtain a first time slot set.
In one implementation, the first terminal device may exclude the first timeslot from the set of candidate timeslots when an RSRP of a transmission of unicast traffic or multicast traffic on all or part of the subchannels on the first timeslot is greater than a threshold. The RSRP may be an average RSRP in the first time slot, or an RSRP in a sub-channel occupied in the first time slot.
And E3, determining a second resource in the candidate resources corresponding to the first time slot set.
Illustratively, when the first terminal device performs SCI detection and energy measurement, if it finds that there is a slot occupied and reserved by other terminal devices, the slot is excluded. The first terminal equipment only selects the unoccupied time slot, so that the interference influence caused by the fact that the beam direction is determined not accurately can be reduced, the first terminal equipment can select resources with less interference in the mode, and the communication performance is improved. Optionally, in the foregoing embodiment, a transmission type corresponding to the communication on the first resource is multicast or unicast, and a transmission type of the data on the second frequency of the first terminal device is broadcast.
Because if the second terminal device performs unicast or multicast service and the first terminal device performs broadcast service, the second terminal device may perform unicast or multicast service in the determined beam direction or beam direction subset; and the first terminal device performs a broadcast service in an omnidirectional beam or a beam scanning manner. The different transmission modes have different beam directions, and cannot realize frequency division multiplexing on the same time slot. In the above manner, by filtering out the time slot occupied by unicast or multicast transmission during broadcast transmission, the problem of collision of different transmission types during beam receiving and transmitting determination can be avoided.
And, by excluding the time slot occupied by the transmission on the detected second frequency and transmitting on the unoccupied time slot, the interference influence caused by the beam direction being determined not in time can be reduced.
In another implementation manner, the second terminal device may also implement S1104 through the following steps F1 to F5:
and F1, receiving at least one piece of third information based on the second frequency, wherein the third information is used for indicating the resource of the corresponding terminal equipment on the second frequency.
And F2, determining fourth resources in the candidate resource set of the second frequency according to the resources indicated by the at least one third message.
Specifically, the first terminal device may determine the fourth resource in the candidate resource set of the second frequency according to the time slot where the resource indicated by the third information is located and the reservation period indicated in the third information.
And F3, determining a third resource in the candidate resource set based on the first resource.
Step F3 may refer to step A1, which is not described herein again.
And F4, excluding the third resource and the fourth resource from the candidate resource set to obtain a third resource set.
And F5, determining the second resource in the third resource set.
Illustratively, like the prior art, whether an occupied resource is available or not is determined by a threshold of signal quality on the corresponding resource based on the detection result on the second frequency (i.e., the third resource and the fourth resource) regardless of the transmission beam direction of the detected resource. All available resources are taken as candidate resources. In the mode, the cleanest candidate resource can be selected as far as possible by completely detecting all resources without considering the beam direction, so that the system performance is improved.
Optionally, the signal quality corresponding to the resource may be a channel quality measured by the first terminal device on a received control channel carrying the first information (or the third information), or may be a channel quality measured by the first terminal device on a data channel scheduled or indicated by the received first information (or the third information). Alternatively, the signal quality may be measured based on information or reference signals of the control channel and/or the data channel. Optionally, the signal quality may be one or more of RSRP, RSRQ, RSSI.
By the method, the probability of resource conflict can be reduced, the accuracy of resource selection is improved, and the system performance can be improved. Three ways of determining the second resource are described above. In the process of determining the second resource, a resource that is semi-persistent or is reserved to the maximum may be selected as the second resource from a time m, where the time m is a time of resource re-evaluation or resource pre-occupation evaluation.
Optionally, after determining the second resource, the second resource may be re-evaluated and preempted.
For example, the first terminal device may determine whether the second resource is temporarily preempted or occupied by other terminal devices on the first beam. If so, the resources occupied by other terminal devices with higher priority can be excluded from the second resources. By the method, whether the selected resources in the beam transmitting direction are clean or not is further confirmed before transmission, so that resource conflict can be further reduced, and the transmission performance in the corresponding beam transmitting direction is ensured.
Further, the first terminal device may determine whether a resource reselection is required after the second resource re-evaluation and preemption evaluation. If necessary, the resource selection may be performed again, and the selection process is similar to the method described in fig. 13 and will not be described again here. In one embodiment, the first terminal device may determine whether to perform resource reselection according to the size of the resource remaining after the second resource is subjected to the re-execution evaluation and the preemption evaluation, for example, if the remaining resource is smaller than a threshold value, the resource reselection may be performed.
S1304, the first terminal device transmits data using the second resource on the second frequency.
For example, the first terminal device may transmit data to the third terminal device using the second resource on the second frequency using the first beam. The third terminal device may be the same terminal device as the second terminal device, or may be a different terminal device, which is not limited specifically herein.
The first terminal device may also transmit indication information indicating the second resource on the second frequency. The manner of sending the indication information on the second frequency by the first terminal device may be: the indication is transmitted over the SCI on the second frequency. The indication information may also include beam direction indication information of the first beam, and the beam direction indication information of the first beam may refer to the relevant description of the beam direction indication information in the first information, and repeated parts are not described again.
Illustratively, step S1304 may be performed by the transceiver module 820 of the first terminal device.
Optionally, the first terminal device may further determine whether to perform resource reselection, and if so, may perform resource reselection again, where the selection process is similar to the method described in fig. 11, and is not described herein again. If not, the selected resources may continue to be used for transmission.
In the embodiment of the application, when measurement is performed on the second frequency, the accuracy of resource selection can be improved by performing corresponding resource measurement and elimination according to the determined beam direction, and further, the communication performance can be improved. And by associating the threshold for resource exclusion to different beam directions, the accuracy of resource selection can be further improved.
In one implementation, if the service sent by the first terminal device is a broadcast message, the first terminal device may sense and monitor in an omnidirectional receiving beam manner. Optionally, if it is detected that unicast or multicast transmission exists on all or part of the sub-channels in a certain time slot, the first terminal device that performs broadcast needs to exclude the whole time slot. When unicast or multicast transmission is carried out, the first terminal equipment transmits in the determined beam direction or the beam direction subset; when the broadcast transmission is performed, the first terminal device performs transmission in an omnidirectional beam or a beam scanning manner. The different transmission modes have different beam directions, and cannot realize frequency division multiplexing on the same time slot. Therefore, the time slot occupied by unicast or multicast transmission can be directly filtered out by broadcast transmission. Thereby avoiding the problem of collision of different transmission types when determining the transceiving beams. Further optionally, if it is detected that the signal quality (which may be an average signal quality over the entire time slot or may also be a signal quality over an occupied sub-channel) of unicast or multicast transmission on all or a part of sub-channels of a certain time slot exceeds a specific threshold, the first terminal device that performs broadcasting needs to exclude the entire time slot.
In another implementation, if the service sent by the first terminal device is a multicast message, the first terminal device may perform the resource exclusion procedure in the same manner as the broadcast service. Alternatively, the first terminal device may perform the resource exclusion process described above with respect to fig. 13 with one received set of beamlets. This set of received sub-beams is directed towards other end-devices (e.g. third end-devices) in multicast communication with the first end-device.
In another implementation manner, if the service sent by the first terminal device is a unicast message, when performing the resource exclusion process, the unicast first terminal device has specific receiving and sending devices, and thus has specific receiving and sending directions, so that the above-mentioned resource selection can be implemented according to the method shown in fig. 13.
Optionally, if the first terminal device performs unicast transmission, it needs to periodically indicate the spatial transmission beam direction of the first terminal device. This spatial orientation may be in a horizontal plane, in a vertical plane, or in both a horizontal and vertical plane, as shown in fig. 15-18. The first terminal device that performs unicast may use control signaling (for example, carrying beam indication information in the control signaling) to indicate the beam direction of its current transmission according to a coordinate axis agreed by a protocol or predefined. And indicating the current transmission beam direction of the unicast direction, so that the receiving equipment (such as third terminal equipment) judges the influence of other unicast, multicast or broadcast modes on the transmission of the receiving equipment according to the transmission beam direction of the first terminal equipment. Optionally, when the transmission mode is broadcast, the indicated beam direction may indicate an omni-directional or beam-sweeping transmission direction using a specific value of the field indicating the beam direction. For example, the indication information of the beam direction for the SCI of 3 bits may be indicated using 000 or 111. Alternatively, any value may be used to indicate, but the transmission currently being made is a broadcast transmission indicated in the transmission type field. The receiving device (e.g. the third terminal device) may ignore the information of the transmit beam direction or may understand it in an omnidirectional or beam-scanning manner when determining that the transmission type is broadcast. Optionally, when the first terminal device performs resource exclusion, the RSRP threshold of the resource exclusion may be associated with different beam directions. Alternatively, the excluded signal quality threshold may be associated as a difference in angle between the transmit beam direction of the other terminal device (e.g., the transmit beam direction of the second terminal device) and the receive beam direction. The smaller the difference, the lower the threshold for signal quality for resource exclusion. I.e. preferentially excluding the resource reservation and occupation in the same beam direction as the own beam. Optionally, the threshold of the signal quality is further associated with a service priority and an idle status value of the resource pool when other terminal devices transmit.
In the above manner, by indicating the transmitted beam direction, the receiving device (e.g., the third terminal device) can accurately obtain the beam direction of the interference source, and then combine the measured signal quality of the interference, thereby avoiding selecting the transmission resource in the strong-interference co-beam direction, and improving the transmission performance. The above describes the process of resource selection by the first terminal device. Optionally, in the process of resource selection, the first terminal device may further measure an idle state of the resource pool, that is, determine resource occupation information on the resource pool. In a possible implementation manner, the first terminal device may determine, according to the resource occupation information on the resource pool where the first resource is located, a transmission parameter for sending data, where the transmission parameter includes: one or more of transmission power, transmission bandwidth, and modulation and coding scheme of transmission data. Resource occupancy information may include, but is not limited to: a Channel Busy Ratio (CBR), and/or a channel occupancy ratio (CR). Three ways of determining the resource occupation information are described below.
In the first mode, at least one beam in the candidate beam set is measured on the resource pool to obtain the measurement information of the at least one beam, and the resource occupation information is obtained according to the average value of the measurement information of the at least one beam. For example, measurements are made in all beam directions, and then the energy of the detected signals and the resource occupancy values are averaged over all beam directions, and then CR and CBR are calculated.
And in the second mode, at least one wave beam in the candidate wave beam set is measured on the resource pool to obtain the measurement information of the at least one wave beam, and then the resource occupation information is obtained according to the measurement information of each wave beam in the at least one wave beam. For example, measurements are made in each beam direction, and then the values of CR and CBR on the respective beams (per beam) are calculated.
And thirdly, measuring the resource occupation information of the beam expected to be sent or received on the resource pool to obtain the measurement information of the beam, and then obtaining the resource occupation information according to the measurement information of the beam. For example, measurements are made in the desired transmit or receive beam direction, and then the values of CR and CBR on per beam are calculated.
In the above manner, by performing measurement according to each beam, the accuracy of measuring the occupation condition of the resource pool can be improved in the process of selecting and excluding resources based on the beams.
The embodiment of the application provides a communication device. The communication apparatus may be used to implement the functions of the terminal device related to the method, for example, the communication apparatus may be the terminal device itself, such as a vehicle-mounted terminal device or a roadside unit, or the communication apparatus may also be an apparatus capable of supporting the terminal device to implement the functions, such as a chip, a module, a TBOX applied in the terminal device, or other combined devices and components (or called assemblies) having the functions of the terminal device shown in this application, for example, the communication apparatus may be a chip, a module, or an assembly in a vehicle-mounted terminal device or a roadside unit, etc. The communication device may include the structure shown in fig. 8 and/or fig. 9.
An embodiment of the present application further provides a computer-readable storage medium, where a computer program is stored, and when the computer program is executed by a computer, the computer may implement the process related to the terminal device in the foregoing method.
The embodiment of the present application further provides a computer program product, where the computer program product is used to store a computer program, and when the computer program is executed by a computer, the computer may implement the flow related to the terminal device in the above method.
The embodiment of the present application further provides a chip or a chip system, where the chip may include a processor, and the processor may be configured to call a program or an instruction in a memory, and execute a flow related to the terminal device in the foregoing method. The chip system may include the chip, and may also include other components such as memory or a transceiver.
The embodiment of the present application further provides a circuit, which can be coupled to the memory and configured to execute the process related to the terminal device in the foregoing method. The chip system may include the chip, and may also include other components such as a memory or transceiver.
As will be appreciated by one skilled in the art, embodiments of the present application may be provided as a method, system, or computer program product. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and so forth) having computer-usable program code embodied therein.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.

Claims (37)

1. A method of communication, the method comprising:
receiving first information on a first frequency, the first information indicating a first resource of a first terminal device on a second frequency, the second frequency being higher than the first frequency;
determining second resources based on the first resources, the second resources being used for transmitting data on the second frequency;
transmitting data on the second frequency using the second resource.
2. The method of claim 1, wherein the determining the second resource based on the first resource comprises:
determining the third resource in the candidate resource set of the second frequency according to the time slot where the first resource is located and the reservation period indicated in the first information;
excluding the third resource from the candidate resource set to obtain a first resource set;
determining the second resource in the first set of resources.
3. The method of claim 1 or 2, wherein the method further comprises:
receiving indication information of the first resource with a first beam on the second frequency;
the first beam is determined according to at least one of:
device identification information of the second terminal device and/or the third terminal device;
the position information of the second terminal device and the position information of the third terminal device;
the first information comprises a source identifier and/or a destination identifier;
transmitting a transmission type used by the data;
a beam direction of a transmit beam of the first terminal device on the second frequency;
a set of candidate beams, the set of candidate beams comprising at least one beam;
the third terminal device is a terminal device which communicates with the second terminal device on the second frequency.
4. The method of claim 1, wherein the determining the second resource based on the first resource comprises:
determining a first time slot in the candidate time slot set of the second frequency based on the time slot in which the first resource is located;
excluding the first time slot from the candidate time slot set to obtain a first time slot set;
and determining the second resource in the candidate resources corresponding to the first time slot set.
5. The method of claim 4, wherein the communication on the first resource corresponds to a transmission type different from a transmission type of the data.
6. The method of claim 1, wherein the determining the second resource based on the first resource comprises:
receiving at least one third message in a second set of slots based on the second frequency, the second set including at least one slot other than the slot corresponding to the first resource, the third message indicating a resource of a corresponding terminal device on the second frequency;
determining a fourth resource in the candidate resource set of the second frequency according to the resource indicated by the at least one third information;
determining a third resource in the candidate set of resources based on the first resource;
excluding the third resource and the fourth resource from the candidate resource set to obtain a third resource set;
determining the second resource in the third set of resources.
7. The method of any of claims 1-6, wherein the first information comprises information indicating the first resource and at least one of:
the beam direction information of the transmission beam of the first terminal device on the second frequency, the transmission type indication information of the data on the first resource, the priority information of the data on the first resource, the position information of the first terminal device, the source identifier, and the destination identifier.
8. The method of any one of claims 1-7, further comprising:
receiving fifth information on the first frequency, the fifth information indicating: the first-level control information carrying the fifth information is used for indicating the first information.
9. The method of claim 8, wherein the fifth information is carried in at least one of the following fields in the first level control information: a first field for indicating a second level control information format, a second field for indicating a modulation and coding scheme, MCS, a third field for indicating an MCS table, or a reserved field.
10. A method of communication, the method comprising:
determining a first resource for transmitting data on a second frequency;
generating first information, wherein the first information is used for indicating the first resource of the first terminal equipment on the second frequency;
transmitting the first information on the first frequency, the second frequency being higher than the first frequency.
11. The method of claim 10, wherein the first information comprises information indicating the first resource and at least one of:
the beam indication information of the transmission beam of the first terminal device on the second frequency, the transmission type indication information of the data on the first resource, the priority information of the data on the first resource, the position information of the first terminal device, the source identifier, and the destination identifier.
12. The method of claim 11, wherein said beam indication information is used to indicate a direction of a transmission beam of said first terminal device in a preset coordinate axis; and/or
The beam indication information includes: beam indication information in the horizontal direction and/or the vertical direction.
13. The method according to claim 11 or 12, wherein the data is transmitted in association with a preset state value of the beam indication information.
14. The method of claim 13, wherein when the data is transmitted in a unicast mode, the beam indication information is a first preset status value; or,
when the data transmission mode is multicast, the beam indication information is a second preset state value; or,
and when the data transmission mode is broadcasting, the beam indication information is a third preset state value.
15. The method of any one of claims 10-14, further comprising:
transmitting fifth information on the first frequency, the fifth information indicating: and the first-level control information carrying the fifth information is used for indicating the first information.
16. The method of claim 15, wherein the fifth information is carried in at least one of the following fields in the first level control information: a first field for indicating a second level control information format, a second field for indicating a modulation and coding scheme, MCS, a third field for indicating an MCS table, or a reserved field.
17. The method of any of claims 10-16, wherein said transmitting the first information on the first frequency comprises:
transmitting the first information on the first frequency when a first condition is satisfied, wherein the first condition comprises one or more of:
receiving configuration information, wherein the configuration information is used for indicating the first terminal equipment to enable the first information to be transmitted on the first frequency;
detecting that a channel occupancy on a resource pool of the second frequency is above a first threshold on the second frequency;
detecting that a channel busy ratio on a resource pool of the second frequency is above a second threshold on the second frequency;
detecting, on the second frequency, that a channel quality on a resource pool of the second frequency is below a third threshold;
the priority of the data is higher than a fourth threshold;
the acknowledgement message of the data comprises at least one negative acknowledgement, NACK;
the distance between the first terminal equipment and the second terminal equipment is greater than a fifth threshold;
the first terminal device is configured with a power save transmission mode.
18. A communications apparatus, the apparatus comprising:
a transceiver module, configured to receive first information on a first frequency, where the first information is used to indicate a first resource of a first terminal device on a second frequency, and the second frequency is higher than the first frequency;
a processing module to determine second resources based on the first resources, the second resources to transmit data on the second frequency;
the transceiver module is further configured to transmit data on the second frequency using the second resource.
19. The apparatus of claim 18, wherein the processing module is specifically configured to:
determining the third resource in the candidate resource set of the second frequency according to the time slot of the first resource and the reservation period indicated in the first information;
excluding the third resource from the candidate resource set to obtain a first resource set;
determining the second resource in the first set of resources.
20. The apparatus of claim 18 or 19, wherein the transceiver module is further configured to:
receiving indication information of the first resource with a first beam on the second frequency;
the first beam is determined according to at least one of:
device identification information of the second terminal device and/or the third terminal device;
the position information of the second terminal device and the position information of the third terminal device;
the first information comprises a source identifier and/or a destination identifier;
transmitting a transmission type used by the data;
a beam direction of a transmit beam of the first terminal device on the second frequency;
a set of candidate beams, the set of candidate beams comprising at least one beam;
wherein the third terminal device is a terminal device that communicates with the second terminal device on the second frequency.
21. The apparatus of claim 18, wherein the processing module is specifically configured to:
determining a first time slot in the candidate time slot set of the second frequency based on the time slot in which the first resource is located;
excluding the first time slot from the candidate time slot set to obtain a first time slot set;
and determining the second resource in the candidate resources corresponding to the first time slot set.
22. The apparatus of claim 21, wherein communications on the first resource correspond to a transmission type different from a transmission type of the data.
23. The apparatus as recited in claim 18, wherein said transceiver module is further configured to:
receiving at least one third message in a second set of slots based on the second frequency, the second set including at least one slot other than the slot corresponding to the first resource, the third message indicating a resource of a corresponding terminal device on the second frequency;
the processing module is specifically configured to:
determining a fourth resource in the candidate resource set of the second frequency according to the resource indicated by the at least one third information;
determining a third resource in the candidate set of resources based on the first resource;
excluding the third resource and the fourth resource from the candidate resource set to obtain a third resource set;
determining the second resource in the third set of resources.
24. The apparatus of any one of claims 18-23, wherein the first information comprises information indicating the first resource and at least one of:
the beam direction information of the transmission beam of the first terminal device on the second frequency, the transmission type indication information of the data on the first resource, the priority information of the data on the first resource, the position information of the first terminal device, the source identifier, and the destination identifier.
25. The apparatus of any of claims 18-24, wherein the transceiver module is further configured to:
receiving fifth information on the first frequency, the fifth information indicating: and the first-level control information carrying the fifth information is used for indicating the first information.
26. The apparatus of claim 25, wherein the fifth information is carried in at least one of the following fields in the first level control information: a first field for indicating a second level control information format, a second field for indicating a modulation and coding scheme, MCS, a third field for indicating an MCS table, a reserved field.
27. A communications apparatus, the apparatus comprising:
a processing module to determine a first resource for transmitting data on a second frequency; and
generating first information, wherein the first information is used for indicating the first resource of the first terminal equipment on the second frequency;
a transceiver module, configured to transmit the first information on the first frequency, where the second frequency is higher than the first frequency.
28. The apparatus of claim 27, wherein the first information comprises information indicating the first resource and at least one of:
the beam indication information of the transmission beam of the first terminal device on the second frequency, the transmission type indication information of the data on the first resource, the priority information of the data on the first resource, the position information of the first terminal device, the source identifier, and the destination identifier.
29. The apparatus of claim 28, wherein the beam indication information is for indicating a direction of a transmission beam of the first terminal device in a preset coordinate axis; and/or
The beam indication information includes: beam indication information in the horizontal direction and/or the vertical direction.
30. The apparatus according to claim 28 or 29, wherein the data is transmitted in a manner associated with a preset status value of the beam indication information.
31. The apparatus of claim 30, wherein when the data is transmitted in a unicast mode, the beam indication information is a first preset state value; or,
when the transmission mode of the data is multicast, the beam indication information is a second preset state value; or,
and when the transmission mode of the data is broadcasting, the beam indication information is a third preset state value.
32. The apparatus of any of claims 27-31, wherein the transceiver module is further configured to:
transmitting fifth information on the first frequency, the fifth information indicating: the first-level control information carrying the fifth information is used for indicating the first information.
33. The apparatus of claim 32, wherein the fifth information is carried in at least one of the following fields in the first level control information: a first field for indicating a second level control information format, a second field for indicating a modulation and coding scheme, MCS, a third field for indicating an MCS table, a reserved field.
34. The apparatus according to any of claims 27-33, wherein the transceiver module is specifically configured to:
transmitting the first information on the first frequency when a first condition is satisfied, wherein the first condition comprises one or more of:
receiving configuration information, wherein the configuration information is used for indicating the first terminal equipment to enable the first information to be transmitted on the first frequency;
detecting that a channel occupancy on a resource pool of the second frequency is above a first threshold on the second frequency;
detecting that a channel busy ratio on a resource pool of the second frequency is above a second threshold on the second frequency;
detecting, on the second frequency, that a channel quality on a resource pool of the second frequency is below a third threshold;
the priority of the data is higher than a fourth threshold;
the acknowledgement message of the data comprises at least one negative acknowledgement, NACK;
the distance between the first terminal device and the second terminal device is larger than a fifth threshold;
the first terminal device is configured with a power save transmission mode.
35. A computer-readable storage medium, for storing a computer program which, when run on a computer, causes the computer to perform the method of any one of claims 1 to 9 or causes the computer to perform the method of any one of claims 10 to 17.
36. A chip comprising a processor and a communication interface, the processor being configured to read instructions to perform the method of any one of claims 1 to 9 or to read instructions to perform the method of any one of claims 10 to 17.
37. A computer program product, which, when run on a computer, causes the computer to perform the method of any one of claims 1 to 9, or causes the computer to perform the method of any one of claims 10 to 17.
CN202110990776.2A 2021-08-26 2021-08-26 Communication method and device Pending CN115734292A (en)

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