WO2019096275A1 - Pc5载频选择方法以及装置、设备和基站 - Google Patents
Pc5载频选择方法以及装置、设备和基站 Download PDFInfo
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- WO2019096275A1 WO2019096275A1 PCT/CN2018/116030 CN2018116030W WO2019096275A1 WO 2019096275 A1 WO2019096275 A1 WO 2019096275A1 CN 2018116030 W CN2018116030 W CN 2018116030W WO 2019096275 A1 WO2019096275 A1 WO 2019096275A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/30—Services specially adapted for particular environments, situations or purposes
- H04W4/40—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/12—Wireless traffic scheduling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
Definitions
- the present application relates to the field of communications, for example, to a PC5 carrier frequency selection method and apparatus, device and base station.
- the so-called car network is that vehicles can participate in wireless communication, through the use of advanced wireless cellular communication technology, real-time information interaction between the car and the car, the car and the roadside infrastructure, to inform each other's current status (including the location of the vehicle) , speed, acceleration, driving route) and learned road environment information, collaboratively aware of road hazard conditions, timely provide a variety of collision warning information to prevent road traffic safety accidents.
- V2V Vehicle-to-Vehicle Communications
- V2I Vehicle-to-Infrastructure Communications
- Vehicle-to-Pedestrian Vehicle-to-Pedestrian
- the transmission of V2X messages can be transmitted in a broadcast manner.
- One implementation of the broadcast is based on UE-to-UE direct discovery/communication (sidelink, ProSe, D2D) support through the PC5 interface (in 3GPP Rel)
- An interface for direct interaction between a UE and a UE introduced in -12, called a PC5 interface performs broadcast transmission of a V2X message.
- the V2X service data sent by the sender through multiple carrier frequencies may not be able to simultaneously receive the V2X service data sent on the multiple carrier frequencies.
- a PC5 carrier frequency selection, V2X service data transmission and reception method, device and device provided by the embodiments of the present application can improve the accuracy of carrier frequency selection and improve the carrier that needs to be received when the V2X receiver has limited reception capability. Frequency phenomenon.
- An embodiment of the present application provides a PC5 carrier frequency selection method, including: obtaining an initial candidate carrier frequency set of the V2X service data according to a service identifier of a V2X service data and a service identifier and a carrier frequency mapping relationship; The transmission carrier frequency of the V2X service data is selected from the initial candidate carrier frequency set.
- the embodiment of the present application further provides a PC5 carrier frequency selection method, including: receiving carrier frequency selection assistance information sent by a V2X sender device, where the carrier frequency selection assistance information includes a service identifier, a service identifier, and a carrier frequency according to V2X service data. Mapping the relationship to obtain an initial candidate carrier frequency set of the V2X service data; and transmitting carrier frequency selection control information to the V2X transmitting end device.
- the embodiment of the present application further provides a PC5 carrier frequency selection method, including: obtaining a priority corresponding to a service identifier or a service identifier list sorted by priority; and a service identifier list sorted according to a priority corresponding to the service identifier or a priority of receiving And selecting, as the receiving carrier frequency, a carrier frequency corresponding to the M higher priority services that can be simultaneously received within the range supported by the PC5 multi-carrier frequency receiving capability, where the M is an integer greater than or equal to 1.
- the embodiment of the present application further provides a PC5 carrier frequency selection apparatus, including:
- An initial selection module is configured to obtain an initial candidate carrier frequency set of the V2X service data according to a service identifier of the V2X service data and a service identifier and a carrier frequency mapping relationship;
- the carrier frequency determining module is configured to select a transmission carrier frequency of the V2X service data from the initial candidate carrier frequency set according to carrier frequency selection information.
- the embodiment of the present application further provides a PC5 carrier frequency selection apparatus, including:
- the information receiving module is configured to receive the carrier frequency selection auxiliary information sent by the V2X transmitting end device, where the carrier frequency selection auxiliary information includes: initializing the V2X service data according to the service identifier of the V2X service data and the service identifier and the carrier frequency mapping relationship. Candidate carrier frequency set;
- the configuration processing module is configured to send carrier frequency selection control information to the V2X transmitting end device.
- the embodiment of the present application further provides a PC5 carrier frequency selection apparatus, including:
- the service obtaining module is configured to obtain a priority corresponding to the service identifier or a service identifier list sorted by priority;
- the carrier frequency acquisition module is configured to select M higher prioritys that can be simultaneously received within the range supported by the PC5 multi-carrier frequency receiving capability according to the priority corresponding to the service identifier or the service identifier list sorted by the receiving priority.
- the carrier frequency corresponding to the service is used as the receiving carrier frequency, and the M is an integer greater than or equal to 1.
- the embodiment of the present application further provides a V2X transmitting end device, where the V2X transmitting end device includes a first processor, a first memory, and a first communications bus;
- the first communication bus is configured to implement connection communication between the first processor and the first memory
- the first processor is configured to execute one or more first programs stored in the first memory to implement the steps of the PC5 carrier frequency selection method as described above.
- the embodiment of the present application further provides a base station, where the base station includes a second processor, a second memory, and a second communication bus;
- the second communication bus is configured to implement connection communication between the second processor and the second memory
- the second processor is configured to execute one or more third programs stored in the second memory to implement the steps of the PC5 carrier frequency selection method as described above.
- the embodiment of the present application further provides a V2X receiving end device, where the V2X receiving end device includes a third processor, a third memory, and a third communication bus;
- the third communication bus is configured to implement connection communication between the third processor and the third memory
- the third processor is configured to execute one or more third programs stored in the third memory to implement the steps of the PC5 carrier frequency selection method as described above.
- the embodiment of the present application further provides a computer storage medium, where the computer readable storage medium stores one or more first programs, and the one or more programs are executed by one or more processors to implement the foregoing.
- the steps of the PC5 carrier frequency selection method are performed by one or more processors to implement the foregoing.
- FIG. 1 is a schematic flowchart of a PC5 carrier frequency selection method according to Embodiment 1 of the present application;
- FIG. 2 is a schematic flowchart of performing PC5 carrier frequency selection in combination with carrier frequency selection control information according to Embodiment 1 of the present application;
- FIG. 3 is a schematic flowchart of a PC5 carrier frequency selection method according to Embodiment 2 of the present application.
- FIG. 4 is a schematic structural diagram of a PC5 carrier frequency selection apparatus according to Embodiment 3 of the present application.
- FIG. 5 is a schematic structural diagram of a V2X transmitting end device according to Embodiment 3 of the present application.
- FIG. 6 is a schematic structural diagram of another PC5 carrier frequency selection apparatus according to Embodiment 3 of the present application.
- FIG. 7 is a schematic structural diagram of a base station according to Embodiment 3 of the present application.
- FIG. 8 is a schematic flowchart of a method for selecting a transmit carrier frequency of a mode 4 UE in an RRC idle state according to Embodiment 3 of the present application;
- FIG. 9 is a schematic flowchart of a method for selecting a transmit carrier frequency of an RRC connected mode 4 UE according to Embodiment 4 of the present application.
- FIG. 10 is a schematic flowchart of a method for selecting a transmit carrier frequency of an RRC connected mode 3 UE according to Embodiment 5 of the present application;
- FIG. 11 is a schematic diagram 1 of communication between Vehicle UEs according to Embodiment 5 of the present application.
- FIG. 12 is a second schematic diagram of communication between the Vehicle UEs according to Embodiment 5 of the present application.
- FIG. 13 is a schematic diagram 3 of communication between the Vehicle UEs according to Embodiment 5 of the present application.
- FIG. 14 is a schematic flowchart of a PC5 carrier frequency selection method according to Embodiment 6 of the present application.
- FIG. 15 is a schematic structural diagram of a PC5 carrier frequency selection apparatus according to Embodiment 6 of the present application.
- V2X receiving end device 16 is a schematic structural diagram of a V2X receiving end device according to Embodiment 6 of the present application.
- FIG. 17 is a schematic flowchart of a PC5 receiving carrier frequency selection method according to Embodiment 6 of the present application.
- Embodiment 1 is a diagrammatic representation of Embodiment 1:
- the transmission of V2X messages can be transmitted in a multicast manner and in a broadcast manner.
- a multicast implementation of the multicast is based on the MBSFN (Multicast Broadcast Single Frequency Network) and the SC-PTM (Single-cell point-to-multipoint) broadcast mechanism to support broadcast transmission of V2X messages through the Uu interface.
- One implementation of the broadcast is based on UE-to-UE direct discovery/communication (D2D, sidelink, ProSe) supporting an interface through a PC5 interface (a direct interaction between a UE and a UE introduced in 3GPP Rel-12, called PC5 interface) Broadcast transmission of V2X messages.
- D2D UE-to-UE direct discovery/communication
- PC5 interface a direct interaction between a UE and a UE introduced in 3GPP Rel-12, called PC5 interface
- D2D technology can reduce the burden of cellular networks, reduce the battery power consumption of user equipment, increase the data rate, and improve the robustness of the network infrastructure, which satisfies the requirements of the above high data rate services and proximity services.
- V2X communication can also use D2D to meet the requirements of high data rate services and proximity services.
- D2D technology is also called Proximity Services (ProSe) and Unilateral Link (SideLink, SL).
- V2X communication at least one of data high reliability and high rate transmission is also a broad demand and development trend, and at least one of high reliability and high rate transmission of V2X service data is required. It is necessary to transmit V2X service data by using multiple carrier frequencies. At this time, the accuracy of carrier frequency selection is higher, and it is necessary to improve how to select multiple carrier frequencies to be used.
- This embodiment provides a PC5 carrier frequency selection method for this problem.
- the carrier frequency of the PC5 in this embodiment refers to the carrier frequency used when transmitting through the PC5 interface.
- the PC5 carrier frequency selection method is shown in FIG. The method includes: step S101 and step S102.
- step S101 the V2X transmitting end device obtains an initial candidate carrier frequency set of the V2X service data according to the service identifier of the V2X service data and the service identifier and the carrier frequency mapping relationship.
- the V2X transmitting device in this embodiment may be an in-vehicle terminal device or a user terminal device.
- the specificity can be determined according to the mode of the specific vehicle network communication.
- the V2X transmitting device in this embodiment also serves as a V2X service data receiver.
- the service identifier and the carrier frequency mapping relationship may be characterized by a service identifier and a V2X carrier frequency mapping relationship table.
- the relationship between the service identifier and the carrier frequency mapping in this embodiment can also be configured on the V2X transmitting device in a pre-configured manner; of course, it can also be set on the V2X transmitting device by other means.
- the service identifier is brought to the service identifier and the V2X carrier frequency mapping relationship table for query, and the carrier frequency corresponding to the service identifier can be found, and all the service identifiers are corresponding to the service identifier.
- the carrier frequency then constitutes an initial set of candidate carrier frequencies.
- the service identifier may be specifically transmitted by the upper layer of the V2X sender device to the bottom layer of the V2X sender device.
- step S102 the V2X transmitting end device selects a transmission carrier frequency of the V2X service data from the initial candidate carrier frequency set according to the carrier frequency selection information. Further selecting the transmission carrier frequency from the initial candidate carrier frequency set according to the carrier frequency selection information can improve the accuracy of the carrier frequency selection.
- the V2X transmitting end device selects the transmission carrier frequency of the V2X service data from the initial candidate carrier frequency set according to the carrier frequency selection information, and the V2X transmitting end device uses the carrier frequency selection information to the initial candidate carrier frequency set.
- the process of unqualified carrier frequency deletion results in a valid candidate carrier frequency set.
- the specific carrier frequency selection information and the specific selection mode adopted by the V2X transmitting end device can be flexibly selected according to the current connection state of the V2X transmitting end device and the currently adopted resource allocation mode.
- Scheduled resource allocation (mode 3), in which the UE needs to enter an RRC connection state to request a resource for transmission from the base station, and the UE The resource is requested by transmitting a sidelink UE information message to the base station.
- the resource may also be requested by sending other messages to the base station, and is not limited to the sidelink UE information message.
- UE autonomous resource selection (mode 4). In this mode, the UE selects resources from the resource pool based on the listening sensing to perform SCI (Sidelink Control Information) and data transmission; this method can be used for RRC idle. UE in the status or RRC connected state.
- the V2X transmitting device when the V2X transmitting device is in the RRC idle state, the V2X transmitting device can adopt the mode 4 mode, which can adopt its own information obtained from the base station or other places and can be used for carrier frequency selection.
- the selection of the carrier frequency is performed.
- the related information for obtaining the carrier frequency selection obtained from the base station may be referred to as carrier frequency selection control information, and the V2X transmitting end device may acquire the relevant payload from the base station by using the system message. Frequency selection control information.
- the carrier frequency selection control information is not limited to being acquired from the base station, and is not excluded by pre-configuration or acquisition from the physical layer.
- the V2X transmitting device When the V2X transmitting device is in the RRC connected state, the V2X transmitting device can flexibly select between the mode 3 mode and the mode 4 mode. At this time, the V2X transmitting device can send related information that can be used for carrier frequency selection. For the base station, the carrier frequency is selected by the base station. In this embodiment, the related information for implementing the carrier frequency selection that is sent by the V2X transmitting end device to the base station is referred to as carrier frequency selection assistance information. Of course, in this scenario, the V2X transmitting device and the base station may also be combined to implement carrier frequency selection, for example, the V2X transmitting device (which may combine carrier frequency selection control information or may not combine carrier frequency selection control information) to complete some steps.
- the V2X transmitting device which may combine carrier frequency selection control information or may not combine carrier frequency selection control information
- the base station completes the carrier frequency selection of other steps (the auxiliary information may be selected in combination with the carrier frequency, or the auxiliary information may not be selected in combination with the carrier frequency).
- the V2X transmitting device can also obtain the carrier frequency selection by acquiring the carrier frequency selection control information from the base station when the RRC idle state is used, and the V2X transmitting device can obtain the carrier from the base station through the RRC dedicated signaling.
- the frequency selection control information can also obtain carrier frequency selection control information from the base station through other messages (such as system messages) according to requirements.
- the V2X transmitting device may select at least two carrier frequencies from the obtained effective candidate carrier frequency set as the transmission carrier frequency of the V2X service data. In this step, before the V2X transmitting device selects at least two carrier frequencies from the obtained effective candidate carrier frequency set as the transmission carrier frequency of the V2X service data, it may first determine whether the V2X service data needs to adopt multiple carrier frequency transmission.
- the number of carrier frequencies used for transmission may be determined by the V2X transmitting device, or may be determined by the base station, and then the V2X transmitting device selects a corresponding number of carriers for transmission. frequency.
- V2X service data when transmitting V2X service data by using multiple carrier frequencies, it may be based on high data rate requirements or based on high reliability requirements.
- multi-carrier data splitting can be used.
- high reliability when high reliability is required, multi-carrier data duplication can be used.
- two transmission methods are used. Can also be combined according to actual needs.
- multi-carrier data split transmission after determining at least two transmission carriers of the V2X service data, the ratio of the data transmitted on each transmission carrier frequency may be determined, and may be used by the V2X sender device.
- the autonomous determination may also be determined by the base station, or the V2X sender device may be determined together with the base station.
- the carrier frequency selection information utilized by the V2X source device includes synchronization reference timing information, a channel busy ratio CBR threshold of the V2X resource pool on the carrier frequency (obtainable from the base station, or may be obtained from other places)
- the V2X transmitting end device PC5 has multiple carrier frequency transmission capability information and at least one of a V2X transmission carrier frequency set sent by the base station to the UE, that is, a carrier frequency list that is transmitted by the base station for transmission.
- the V2X transmitting device uses the carrier frequency selection information to remove the carrier frequency deletion in the initial candidate carrier frequency set, which may include, but is not limited to, at least one of the following: using the synchronization reference timing information to use the initial candidate
- the carrier frequency deletion of the asynchronous timing alignment in the carrier frequency set in the initial candidate carrier frequency set, the channel busy ratio CBR measurement value of the V2X resource pool on the carrier frequency is greater than the channel busy ratio CBR threshold of the V2X resource pool on the carrier frequency
- the carrier frequency of the value is deleted; the maximum number of carrier frequencies within the capability range of the V2X transmitting device is selected from the initial candidate carrier frequency set according to the PC5 multi-carrier transmission capability information, and the initial candidate carrier frequency set is redundant. And removing the carrier frequency of the V2X transmission carrier set sent by the base station to the UE, and deleting the carrier frequency except the carrier frequency intersection in the initial candidate carrier frequency set. .
- the V2X sender device when the V2X sender needs to use the carrier frequency to transmit the V2X service data, the V2X sender device can use the service identifier and the service identifier of the V2X service data. Mapping the carrier frequency to obtain an initial candidate carrier frequency set of the V2X service data, and further selecting, from the initial candidate carrier frequency set, the carrier frequency that meets the condition as the transmission carrier frequency of the V2X service data by using the carrier frequency selection information to the V2X When the service data is transmitted, the carrier frequency can be more accurately selected and matched.
- the V2X receiving device can follow the priority of the target service identifier of each V2X service data from high to low. Selecting M carrier frequencies that can be simultaneously received within the range supported by the PC5 multi-carrier receiving capability information as the receiving carrier frequency, thereby ensuring the reception of the high-priority V2X that the user is interested in, and improving the satisfaction of the user experience.
- the above steps can be flexibly combined, and the timing relationship between multiple steps can also be flexibly set.
- the V2X transmitting end device is combined with the carrier frequency selected from the base station respectively.
- the control information is subjected to carrier frequency selection example, and the application is further described in combination with a combined application example of the above multiple steps.
- the relevant carrier frequency selection control information may be obtained by the V2X transmitting end device, or may be acquired by the V2X transmitting end device. Obtained in real time from the base station.
- the method for selecting the carrier frequency of the PC5 at this time is shown in FIG. 2, and includes: step S201 to step S206.
- step S201 the V2X transmitting end device obtains an initial candidate carrier frequency set of the V2X service data according to the service identifier of the V2X service data and the service identifier and the carrier frequency mapping relationship.
- the V2X service data in this step may be the data to be sent generated by the upper layer of the V2X transmitting device, or may be the data to be sent from other sources, and the V2X service data may be one or multiple. If there are multiple, each V2X service message may be related to the initial candidate carrier frequency set of the V2X service message according to the corresponding service identifier and the service identifier and the carrier frequency mapping.
- step S202 the V2X transmitting end device takes the carrier frequency set of the initial candidate carrier frequency set and the V2X transmission carrier frequency set transmitted by the base station to the UE as an effective candidate carrier frequency set.
- the carrier frequency selection information includes the V2X transmission carrier frequency set sent by the base station to the UE, and the V2X transmission carrier frequency set sent by the base station to the UE may be obtained by the V2X transmitting end device from the base station in advance or in real time, or may be obtained from other Locally acquired.
- the V2X transmission carrier frequency that is not supported by the base station in the initial candidate carrier frequency set can be eliminated.
- the V2X sender device may be in a base station coverage state or may be in an uncovered state.
- the carrier frequency of the initial candidate carrier set and the V2X transmission carrier set sent by the base station to the UE is null, and the UE does not detect a suitable cell on the pre-configured V2X carrier frequency.
- the carrier frequency selection information further includes a V2X transmission carrier frequency set for no coverage; and the V2X transmission carrier frequency set without the coverage can be set on the V2X transmitting end device by a preset manner.
- the V2X transmitting device selects the qualified carrier frequency from the initial candidate carrier frequency set by using the carrier frequency selection information to form a valid candidate carrier frequency set, including:
- the carrier carrier frequency set of the initial candidate carrier frequency set and the V2X transmission carrier frequency set without coverage is taken as an effective candidate carrier frequency set for subsequent carrier frequency selection.
- the V2X transmitting end device maps the V2X service data to the corresponding PC5 logical channel.
- a new logical channel is established.
- the UE determines whether to use the multi-carrier data duplication mode according to the reliability level/requirement of the V2X data. If multi-carrier data duplication is required to be transmitted, the UE establishes multiple logical channels for transmitting the data packet.
- the UE may obtain the initial candidate carrier frequency set as the initial candidate carrier frequency set of the PC5 logical channel according to the service identifier and the service identifier of the V2X service data and the carrier frequency mapping relationship. Later, the management of the candidate carrier frequency sets can be performed in units of logical channels.
- the logical channel mapping step is an optional step.
- the specific mapping rules in this embodiment can be flexibly set.
- the carrier frequency in the effective candidate carrier frequency set may be further selected and selected by at least one of the following screening methods. It should be understood that the execution of the download frequency screening process is optional, and the order of execution is not strictly time-limited, the order of execution of the multiple steps is interchangeable, and in some examples may even be performed in parallel.
- step S203 the channel busy ratio CBR measurement value and the corresponding CBR measurement value threshold value of the V2X resource pool on each carrier frequency in the effective candidate carrier frequency set are filtered to obtain the filtered effective candidate carrier frequency set.
- the carrier frequency selection control information includes a channel busy ratio CBR threshold value of the V2X resource pool on the carrier frequency.
- the V2X resource pool on the carrier frequency may be obtained from the base station or may be obtained by pre-configuration on the device.
- the CBR threshold can also be obtained from the base station or by pre-configuration on the device.
- the CBR threshold may be one or multiple. When multiple, the corresponding CBR thresholds may be set according to different service types, quality of service QoS information, carrier frequency, or resource pool.
- the corresponding CBR threshold is first selected according to the service type, the QoS information, the carrier frequency or the resource pool corresponding to the current V2X service data, and then the threshold value and the corresponding CBR measurement value are used for carrying. Further screening of frequency.
- the quality of service QoS information in this embodiment includes, but is not limited to, at least one of a packet priority PPPP, a data rate data rate, a data reliability reliability, and a packet delay budget.
- the CBR threshold obtained from the base station includes, but is not limited to, at least one of the following examples:
- the screening process in this step includes:
- the V2X transmitting device obtains a channel busy ratio CBR measurement value of the V2X resource pool on each carrier frequency in the valid candidate carrier frequency set;
- the channel busy ratio CBR measurement value of the V2X resource pool on the carrier frequency is greater than the carrier frequency deletion of the channel busy ratio CBR threshold value of the V2X resource pool on the carrier frequency, that is, the part carrier frequency cannot be considered as Used for transmission, it is removed from the collection; the rest is considered to be available for transmission.
- the carrier frequency of the V2X resource pool on the carrier frequency is deleted.
- the following optional steps may be included: the remaining carrier frequencies in the set of valid candidate carrier frequencies are sequentially arranged in descending order of the channel busy ratio CBR measurement values of the V2X resource pools on each carrier frequency.
- an equivalent method can also be arranged in descending order, and when the carrier frequency is selected, the order can be selected from the back to the front.
- the V2X transmitting end device may further filter the carrier frequency of the synchronous timing alignment from the valid candidate carrier frequency set by using the synchronization reference timing information, and the effective candidate carrier frequency set Other carrier frequencies are removed.
- the carrier frequency selection information at this time also includes synchronization reference timing information.
- the synchronization timing information includes one or a combination of the following information: a synchronization reference type, including: UE, GNSS, base station; coverage status of the synchronization source, indicating whether the synchronization source is in coverage or out of coverage; and synchronization source absolute timing value.
- the synchronization reference type is a synchronization reference type selected by the physical layer of the UE.
- step S204 the V2X transmitting end device selects the maximum number of carrier frequencies in the range of the effective candidate carrier frequency from the set of valid candidate carrier frequencies according to the PC5 multi-carrier transmission capability information, and adds the excess in the effective candidate carrier frequency set. Other carrier frequencies are removed.
- the carrier frequency selection information further includes the multi-carrier transmission capability information of the V2X transmitting device PC5.
- the PC5 multi-carrier transmission capability information includes band combination information that supports simultaneous PC5 transmission (which may include the maximum number of carrier frequencies supporting simultaneous PC5 transmission and which carrier frequencies can be used for simultaneous PC5 transmission), and supports PC5.
- the band combination information transmitted with Uu (which may include the maximum number of carrier frequencies supporting simultaneous PC5 and Uu transmissions and which carrier frequencies are available for simultaneous PC5 and Uu transmission) and the transmission link Tx chain information.
- the V2X sender device can determine its own capability range according to at least one of its current working state (whether using PC5 and Uu transmission, or only PC5 transmission) and the number of transmission link Tx chains, for example, determining the current maximum of its own.
- the PC5 multi-carrier transmission capability information specifies which carrier frequencies are specifically used, when selecting the maximum number of carrier frequencies within the capability range from the effective candidate carrier frequency set, the designated carrier frequencies are also selected. It should be understood that the number of carrier frequencies finally selected in this embodiment is less than or equal to the maximum number of capabilities of the V2X transmitting end device itself.
- step S205 the V2X transmitting end device determines whether the V2X service data is transmitted using multiple carrier frequencies.
- determining whether the V2X service data adopts multiple carrier frequency transmission in this embodiment may be performed in or before any of the foregoing steps, for example, may be performed in step S202, or may be performed in or before other steps.
- the V2X transmitting end device determines whether the V2X service data uses multiple carrier frequency transmissions, and may adopt any one of the following determination manners:
- the V2X transmitting end device determines whether the V2X service data uses multiple carrier frequency transmission according to the transmission parameter of the V2X service data and the corresponding transmission parameter threshold.
- the V2X transmitting end device determines whether the V2X service data uses multiple carrier frequency transmission according to the mapping relationship between the transmission parameter of the V2X service data and the corresponding carrier frequency number.
- the transmission parameter includes at least one of a buffer data volume size and a quality of service QoS information.
- the quality of service QoS information in this embodiment includes, but is not limited to, a packet priority PPPP, a data rate data rate, a data reliability reliability, and a data.
- the packet delay budget is at least one of a packet delay budget. It should be understood that each transmission parameter in this embodiment can be flexibly selected and combined.
- the transmission parameter threshold value used includes, but is not limited to, at least one of the following threshold values:
- Packet priority PPPP threshold for example, if the PPPP value of the packet is greater than the priority threshold, the PC5 multi-carrier (CA) function is not used; if the PPPP value of the packet is less than the priority threshold , can use the PC5CA function, including at least one of data split and data duplication;
- CA multi-carrier
- any one or several thresholds of the foregoing examples may be used, and the corresponding neighboring service data packet priority PPPP value, buffer size value, data rate value, packet delay budget value, and reliability value (specifically One or more of the characteristics that can be characterized by the reliability level information can be compared with the corresponding threshold value.
- the foregoing threshold value in this embodiment may be obtained from a base station, and may be specifically obtained by using a system message or an RRC dedicated instruction. Of course, it can also be obtained by other means, for example, by pre-configuration. It should be understood that the above-mentioned thresholds are merely examples, and can be flexibly expanded or combined according to actual needs.
- the mapping relationship between the transmission parameter and the corresponding carrier frequency number includes, but is not limited to, at least one of the following examples:
- the priority and the corresponding number of carrier frequencies which may be the number of carrier frequencies corresponding to the PPPP value or the PPPP value range.
- any one or more mapping relationships of the foregoing examples may be used, and one of the corresponding packet priority PPPP value, buffer size value, data rate value, packet delay budget value, and reliability value is used. Or several, and bring in the corresponding mapping relationship to match the corresponding number of carrier frequencies, and determine whether multi-carrier transmission is needed according to the number of matched carrier frequencies. For example, when the number of matched carrier frequencies is 1, it indicates It is not necessary to use multi-carrier transmission. When the number of matched carrier frequencies is an integer value greater than or equal to 2, it indicates that multi-carrier transmission is required.
- mapping relationship in this embodiment may also be obtained from a base station, and may be specifically obtained by using a system message or an RRC dedicated instruction. Of course, it can also be obtained by other means, for example, by pre-configuration. It should be understood that the above-mentioned several mapping relationships are also only an example, and can be flexibly expanded or combined according to actual needs.
- step S206 the foregoing S205 determines that when multiple carrier frequency transmission is required, selecting at least two carrier frequencies from the set of valid candidate carrier frequencies as the transmission carrier frequency of the V2X service data; the selection process includes:
- the number of carrier frequencies to be used may be obtained while judging whether or not to use the multi-carrier transmission.
- the number of carrier frequencies to be used for V2X service data transmission may be determined according to the mapping relationship between the transmission parameters of the V2X transmitting device and the corresponding carrier frequency. For the specific determination process, refer to the method 2 in the above S205. And then selecting a corresponding number of carrier frequencies from the set of valid candidate carrier frequencies as the transmission carrier frequency of the V2X service data according to the determined number of carrier frequencies.
- the carrier frequency is selected, the CBR measurements of the carrier frequencies in the set of valid candidate carrier frequencies can be selected in ascending order.
- the carrier frequency sequence in the valid candidate carrier frequency set is changed, and the subsequent carrier frequency selection may be immediately performed according to the updated carrier frequency list, or may be preset. After the time period, the subsequent carrier frequency selection is performed according to the updated effective candidate carrier frequency set.
- the available frequency point set is changed, such as at least one of adding and deleting, the subsequent carrier frequency selection can be immediately performed according to the updated effective candidate carrier frequency set (ie, the frequency point set and the carrier frequency order).
- selecting at least two carrier frequencies from the set of valid candidate carrier frequencies as the transmission carrier frequency of the V2X service data may also be in the following manner:
- the specific judgment mode can be flexibly selected
- selecting a carrier frequency from the effective candidate carrier frequency set to transmit the V2X service data and then transmitting
- the transmission carrier frequency may also be determined.
- the proportion of data transferred when the V2X transmitting device is in the RRC idle or RRC connected state, the V2X transmitting device can determine the proportion of the data transmitted on each transport carrier autonomously; when the V2X transmitting device is in the RRC connected state, the V2X transmitting device can be autonomous. The determination can also be determined by the base station.
- the CBR measurement value of the resource pool on each carrier frequency, the size of the data packet to be transmitted, and the like may be set; for the resource on the carrier frequency with a smaller CBR measurement value, more data may be transmitted. A relatively small amount of data can be transmitted on a resource on a carrier frequency with a large CBR measurement value.
- the V2X transmitting device determines autonomously, the V2X transmitting device can also be determined by combining the above parameters, and can also be determined according to factors such as the type of data to be transmitted.
- the V2X transmitting device may send the corresponding carrier to the base station before selecting the qualified carrier frequency from the initial candidate carrier frequency set by using the carrier frequency selection information.
- the frequency selection auxiliary information is used to facilitate the base station to perform carrier frequency selection processing.
- the carrier frequency selection assistance information sent to the base station in this embodiment includes but is not limited to:
- Logical channel identifier Logical channel identifier; logical channel group identifier; target identifier or target index number; QoS information; number of carrier frequencies; multi-carrier frequency indication information; wherein multi-carrier frequency indication information is used to indicate whether to use multi-carrier transmission, or whether to use multi-carrier Frequency data split transmission, or whether to use multi-carrier data duplication transmission, or whether to use multi-carrier data split and data duplication transmission; V2X carrier frequency;
- the synchronization timing information includes one or a combination of the following:
- Synchronization reference type including: UE, GNSS, base station;
- the coverage status of the synchronization source to indicate whether the synchronization source is within or outside the coverage
- the logical channel ID, the logical channel group identifier, the target identifier, or the target index number are all corresponding to the V2X service data.
- the above example is an example in which the V2X transmitting end device performs carrier frequency selection in combination with carrier frequency selection control information acquired from the base station.
- the V2X transmitting device can obtain the V2X service data according to the service identifier of the V2X service data and the service identifier and the carrier frequency mapping relationship, when the V2X sender needs to use multiple carriers to transmit V2X service data. Initially collecting a set of candidate carrier frequencies, and selecting carrier carrier frequency effective candidate carrier frequency sets from the initial candidate carrier frequency set by using carrier frequency selection information, and then selecting at least two carrier frequencies from the obtained effective candidate carrier frequency sets as The transmission carrier frequency of V2X service data is transmitted to V2X service data, which can realize reliable, effective selection and matching of multiple carrier frequencies.
- Embodiment 2 is a diagrammatic representation of Embodiment 1:
- the following describes the carrier frequency selection by using the carrier frequency selection auxiliary information sent by the base station in combination with the V2X transmitting device.
- the V2X transmitting device is in an RRC connected state, and may adopt a mode 3 mode or a mode 4 mode.
- the carrier frequency selection auxiliary information includes a transmission parameter corresponding to the V2X service data, and the transmission parameter includes a buffer data amount buffer size. And at least one of quality of service QoS information.
- the quality of service QoS information corresponding to the V2X service data may be characterized by using a logical channel identifier and corresponding QoS information, or a target identifier and corresponding QoS information, or a logical channel group identifier and corresponding QoS information.
- the PC5 signaling includes only the highest QoS requirement information among multiple QoS requirements; if the same logical channel group can be used to transmit multiple QoS requirements.
- the data of the PC5 signaling contains only the highest QoS requirement information among the multiple QoS requirements.
- the V2X transmitting end device selects the qualified carrier frequency component from the initial candidate carrier frequency set by using the carrier frequency selection information to form a valid candidate carrier frequency set, including:
- the RRC message includes carrier frequency selection assistance information, and the carrier frequency selection assistance information includes an initial candidate carrier frequency set;
- a valid candidate carrier frequency set is obtained based on the RRC connection reconfiguration message received from the base station.
- the base station side performs the following steps S301 and S302.
- step S301 receiving carrier frequency selection assistance information sent by the V2X transmitting end device, where the carrier frequency selection assistance information includes an initial candidate for obtaining the V2X service data according to a service identifier of the V2X service data and a service identifier and a carrier frequency mapping relationship.
- Carrier frequency set
- the eNB may receive the RRC message sent by the V2X sending end device, where the RRC message includes the carrier frequency selecting auxiliary information, and the carrier frequency selecting auxiliary information includes the initial candidate of the V2X service data according to the service identifier of the V2X service data and the service identifier and the carrier frequency mapping relationship.
- Carrier frequency set ;
- step S302 carrier frequency selection control information is transmitted to the V2X transmitting device.
- the RRC connection reconfiguration message is sent to the V2X sending end device, where the RRC connection reconfiguration message includes a valid candidate carrier frequency set obtained by deleting the carrier frequency that does not meet the condition in the initial candidate carrier frequency set.
- the carrier frequency selection assistance information received by the base station may include at least one of synchronization reference timing information, PC5 multi-carrier transmission capability information of the V2X transmitting device, and an RRC connection sent by the base station to the V2X transmitting device.
- the reconfiguration message includes a valid candidate carrier frequency set, and the effective candidate carrier frequency set is obtained by the base station performing at least one of the following processing on the initial candidate carrier frequency set:
- the channel busy ratio CBR measurement value of the V2X resource pool on the carrier frequency is greater than the carrier frequency deletion of the channel busy ratio CBR threshold value of the V2X resource pool on the carrier frequency;
- the above steps can also be flexibly combined, and the timing can also be flexibly changed.
- the carrier frequency selection assistance information sent by the V2X transmitting end device to the base station further includes a transmission parameter corresponding to the V2X service data;
- the transmission parameter includes at least one of a buffer data volume size and a quality of service QoS information, and the service
- the quality QoS information includes at least one of a proximity service packet priority PPPP, a data rate data rate, a data reliability reliability, and a packet delay budget;
- the base station may further generate at least one of the carrier frequency selection control information, such as the multi-carrier transmission indication information and the carrier frequency configuration information, according to the foregoing parameters.
- the carrier frequency configuration information includes at least one of carrier frequency selection control information, such as multiple carrier frequency transmission indication information and carrier frequency configuration information, in an example. Carrier frequency data offload ratio configuration information may also be included.
- the RRC connection reconfiguration message received by the V2X transmitting end device from the base station may further include resource allocation mode indication information, where the resource allocation mode indication information indicates whether the V2X transmitting end device adopts a mode3 mode or a mode4 mode.
- the V2X transmitting end device determining whether the V2X service data uses multiple carrier frequency transmission may include: the V2X transmitting end device determining the RRC connection reconfiguration message.
- the multi-carrier transmission indication information is included, it is determined whether the V2X service data is transmitted by using multiple carrier frequencies.
- selecting at least two carrier frequencies from the effective candidate carrier frequency set as the transmission carrier frequency of the V2X service data includes: the V2X transmitting end device obtains the RRC connection reconfiguration message. Carrier frequency quantity configuration information;
- the V2X transmitting device selects a corresponding number of carrier frequencies from the set of valid candidate carrier frequencies according to the carrier frequency configuration information as the transmission carrier frequency of the V2X service data. In one example, the V2X transmitting device selects the CBR measurements of the carrier frequencies in the set of valid candidate carrier frequencies from small to large.
- the V2X transmitting end device selects at least two carrier frequencies from the effective candidate carrier frequency set as the transmission carrier frequency of the V2X service data, and further includes: The carrier frequency data split ratio configuration information determines the amount of data to be transmitted for each selected carrier frequency.
- the carrier frequency selection assistance information sent by the V2X transmitting end device to the base station includes at least one of the following information:
- Logical channel identifier logical channel group identifier; target identifier or target index number; QoS information; number of carrier frequencies; multi-carrier frequency indication information; wherein multi-carrier frequency indication information is used to indicate whether to use multi-carrier frequency transmission, or whether to use multi-carrier transmission Frequency data split transmission, or whether to use multi-carrier data duplication transmission, or whether to use multi-carrier data split and data duplication transmission; V2X carrier frequency (such as the above initial candidate carrier frequency set);
- the synchronization timing information includes one or a combination of the following:
- Synchronization reference type including: UE, GNSS, base station;
- the coverage status of the synchronization source to indicate whether the synchronization source is within or outside the coverage
- the carrier frequency selection control information sent by the base station to the V2X transmitting end device includes at least one of the following information:
- the base station may send the carrier selection control information to the UE by using a system message or RRC dedicated signaling, where the carrier frequency selection control information includes one or a combination of the following:
- Carrier frequency list :
- a set of valid candidate carrier frequencies after screening according to the CBR result (also referred to as a list of available carrier frequencies);
- the number of carrier frequencies (the number of carrier frequencies to be used or the maximum number of carrier frequencies that can be used);
- Target identification or target index number 4.
- Priority threshold For example, if the PPPP value of the data packet is greater than the priority threshold, the PC5CA function is not used. If the PPPP value of the data packet is less than the priority threshold, the PC5CA function, including data, can be used. Split,data duplication;
- This embodiment further provides a V2X service data sending method, as shown in FIG. 3, including:
- the V2X sender device can obtain the V2X service data according to the service identifier of the V2X service data and the service identifier and the carrier frequency mapping relationship. Initially collecting a set of candidate carrier frequencies, and selecting carrier carrier frequency effective candidate carrier frequency sets from the initial candidate carrier frequency set by using carrier frequency selection information, and then selecting at least two carrier frequencies from the obtained effective candidate carrier frequency sets as The transmission carrier frequency of V2X service data is transmitted to V2X service data, which can realize reliable, effective selection and matching of multiple carrier frequencies.
- Embodiment 3 is a diagrammatic representation of Embodiment 3
- the embodiment provides a PC5 carrier frequency selection device.
- the PC5 carrier frequency selection device can be disposed in the V2X transmitting device, and the functions of each module included by the V2X transmitting device can be implemented by a processor of the V2X transmitting device.
- the PC5 carrier frequency selection device includes an initial selection module 401 and a carrier frequency determination module 402.
- the initial selection module 401 is configured to obtain an initial candidate carrier frequency set of the V2X service data according to the service identifier of the V2X service data and the service identifier and the carrier frequency mapping relationship.
- the carrier frequency determining module 402 is configured to select a transmission carrier frequency of the V2X service data from the initial candidate carrier frequency set according to the carrier frequency selection information. For the specific selection manner, refer to the selection mode shown in the foregoing embodiment, where No longer.
- This embodiment also provides a V2X transmitting end device, which may be an in-vehicle terminal or a user terminal, and the V2X transmitting end device also serves as a receiving device.
- the V2X transmitting end device in this embodiment includes a first processor 501, a first memory 502, and a first communication bus 503;
- the first communication bus 503 is configured to implement connection communication between the first processor 501 and the first memory 502;
- the first processor 501 is configured to execute one or more first programs stored in the first memory 502 to implement the steps of the PC5 carrier frequency selection method as described in the first embodiment.
- the embodiment further provides a computer storage medium storing one or more first programs, the one or more first programs being executed by one or more processors to implement, for example, implementation The PC5 carrier frequency selection method described in Example 1.
- the embodiment further provides a PC5 carrier frequency selection device that can be disposed on the base station.
- the method includes:
- the information receiving module 601 is configured to receive the carrier frequency selection auxiliary information sent by the V2X transmitting end device, where the carrier frequency selection auxiliary information includes: obtaining the V2X service data according to the service identifier of the V2X service data and the service identifier and the carrier frequency mapping relationship. The initial candidate carrier frequency set.
- the configuration processing module 602 is configured to send carrier frequency selection control information to the V2X transmitting end device, and specifically send an RRC connection reconfiguration message to the V2X transmitting end device, where the RRC connection reconfiguration message includes not including the initial candidate carrier frequency set. A set of valid candidate carrier frequencies obtained after the qualified carrier frequency is deleted. For the manner in which the configuration processing module 602 selects the carrier frequency that meets the condition from the initial candidate carrier frequency set by using the carrier frequency selection information, refer to the selection manner shown in the foregoing embodiment, and details are not described herein again.
- the base station in this embodiment includes a second processor 701, a second memory 702, and a second communication bus 703;
- the second communication bus 703 is configured to implement connection communication between the second processor 701 and the second memory 702;
- the second processor 701 is configured to execute one or more second programs stored in the second memory 702 to implement the steps of the PC7 carrier frequency selection method as described in the second embodiment.
- the embodiment further provides a computer storage medium storing one or more programs, the one or more programs being executed by one or more processors to implement the first embodiment or the implementation The steps of the PC7 carrier frequency selection method described in Example 2.
- the present embodiment uses the V2X sender device as the UE as an example, and the UE is in the RRC idle state and uses mode 4.
- the method for selecting the transmit carrier frequency of the mode 4 UE in the RRC idle state is shown in FIG. 8 and includes:
- step S801 after the UE generates the V2X message (that is, the V2X service data, that is, the V2X data packet), the high layer of the UE is mapped according to the service identifier of the V2X message and the service identifier and the carrier frequency for each V2X message.
- the relationship obtains the candidate carrier frequency set 1 (ie, the initial candidate carrier frequency set) and sends it to the AS layer.
- each V2X message may be carried by the UE upper layer to the AS (Access Stratum) layer of the UE, and may carry at least one of the following: its corresponding service identifier, target identifier, priority (PPPP), carrier frequency set. 1 (containing one or more V2X carrier frequency information).
- AS Access Stratum
- PPPP priority
- step S802 when each V2X message arrives at the AS layer, the AS layer of the UE maps it to the corresponding PC5 logical channel according to the service related information of the V2X message.
- the service related information is one or a combination of the following: V2X service identification, target identification, PPPP priority, reliability requirement, data rate requirement, packet delay budget. For example, a V2X message with a service identifier of 1 and a priority of 1 is mapped to logical channel 1, and a V2X message with a service identifier of 1 and a priority of 2 is mapped to logical channel 2.
- the UE receives the mapping relationship between the PPPP and the reliability requirement from the base station, or the UE obtains the mapping relationship between the PPPP and the reliability requirement through the pre-configuration manner, or the UE obtains the PPPP from the V2X control function or the V2X application server.
- the mapping relationship between the reliability requirements the UE can calculate the reliability requirement of the data packet according to the mapping relationship between the PPPP, the PPPP and the reliability requirement of the data packet.
- the UE may obtain the V2X message and its corresponding reliability requirement from the upper layer.
- the UE may determine whether to use the multi-carrier data duplication mode transmission according to the reliability requirement of the data packet.
- the UE may compare the obtained reliability requirement with the reliability threshold according to the pre-configured, or obtained from the V2X control function or the V2X application server, or the reliability threshold obtained from the base station; or obtain the reliability demand range from the base station.
- the mapping relationship between the reliability requirement and the reliability requirement range and the number of carrier frequencies is matched with the mapping relationship between the number of carriers and the carrier frequency; thereby determining whether to use the multi-carrier data duplication mode transmission.
- the UE if multi-carrier data duplication is used for transmission, the UE establishes multiple logical channels for transmitting the data packet. When judging that it is necessary to use multiple carrier frequencies for transmission, it is no longer necessary to perform multi-carrier transmission. When the judgment process is not performed here, the multi-carrier transmission determination can be performed later.
- step S803 the UE determines its corresponding candidate carrier frequency set for each PC5 logical channel (or each V2X data packet).
- the corresponding candidate carrier frequency set 1 is determined according to the carrier frequency set corresponding to the V2X message obtained from the upper layer.
- the AS layer obtains an intersection with the candidate carrier frequency set 1 according to the V2X carrier frequency set supported by the base station, and uses the intersection as the candidate carrier frequency set 2.
- the UE considers that the senior is in an uncovered state.
- the candidate carrier frequency set 2 is derived from the candidate carrier frequency set 1 and the pre-configured intersection between the V2X carrier frequencies for no coverage for subsequent carrier frequency selection.
- step S804 the UE selects multiple carrier frequencies of the synchronization timing alignment from the candidate carrier frequency set 2 according to the synchronization reference timing condition on the carrier frequency of the resource pool, and deletes other carrier frequencies in the candidate carrier frequency set 2 .
- the synchronization reference timing case includes one or a combination of the following information: the synchronization reference type, the coverage status of the synchronization source (in-cover or out-of-cover), and the synchronization source absolute timing value.
- the synchronization reference type is a synchronization reference type selected by the physical layer of the UE. This step may also not be performed.
- step S805 the UE performs CBR measurement on the resource pool of the V2X carrier frequency in the candidate carrier frequency set 2 or the candidate carrier frequency set 3 (when the step S804 is not performed), or the UE aligns the timing of the synchronization in the candidate carrier frequency set 2
- the CBR measurement is performed by the V2X resource pools in multiple carrier frequencies.
- the UE may obtain V2X resource pool information on the candidate carrier frequency from the base station by using a system message, or obtain resource pool information on the candidate carrier frequency by using a pre-configured manner.
- the UE may obtain one or more CBR thresholds for determining whether the carrier frequency of the V2X resource pool is available for the PC5 transmission by using the system message, or the UE may obtain the carrier frequency for determining the V2X resource pool by using a pre-configured manner. Whether one or more CBR thresholds are available for transmission.
- the configuration information obtained by the UE may also be that multiple CBR thresholds respectively correspond to different QoS parameters or V2X service types or carrier frequencies or resource pools.
- the QoS parameter may be one or a combination of the following: priority, data rate, reliability, packet delay budget.
- the UE determines a CBR threshold corresponding to the logical channel according to a service type or a QoS parameter corresponding to the logical channel, and is used to determine whether the V2X carrier frequency is available for transmission of the logical channel data.
- the UE determines, according to the CBR measurement result of the V2X resource pool on each carrier frequency, whether the carrier frequency of the measured resource pool is available for transmission, for example, if the CBR measurement result of the resource pool is higher than the corresponding CBR threshold.
- the UE If the value is lower, the UE considers that the carrier frequency is not available for transmission; if the CBR measurement result of the resource pool is lower than the corresponding CBR threshold, the UE considers that the carrier frequency is available for transmission.
- the UE filters out the candidate carrier frequency set 4 according to the CBR measurement process of the resource pool of the V2X carrier frequency in the candidate carrier frequency set 2 or the candidate carrier frequency set 3, that is, the carrier frequency that is not available for transmission is excluded.
- the UE sorts the candidate carrier frequency set 4 intermediate frequency points according to the CBR measurement values of the frequency points. For example, if the carrier frequency is sorted according to the CBR measurement value from small to large, the CBR measurement value is the smallest frequency point row. In the first place, and so on.
- step S806 the UE selects a carrier frequency forming candidate carrier frequency set 5 that can be simultaneously transmitted within the UE capability range from the candidate carrier frequency set 4 according to its own PC5CA capability information.
- the UE selects, from the candidate carrier frequency set 4, the maximum number of carrier frequency forming candidate carrier frequency sets 5 that can simultaneously perform PC5 transmission in the UE capability range according to the PC5CA transmission capability information.
- the PC5CA transmission capability information of the UE includes one or a combination of: 1) band combination band combination information for simultaneous PC5 transmission; 2) band band combination information for simultaneous PC5/Uu transmission; 3) transmission chain The number of road Txchain.
- step S807 the AS layer of the UE determines whether multi-carrier transmission is required, and determines the number of carrier frequencies for transmission when needed and selects a carrier frequency set for transmission from the candidate carrier frequency set 5.
- the AS layer of the UE may determine whether it is necessary to perform PC5 data transmission in at least one of a data split and a data duplication manner by using one or a combination of the following information. If necessary, further determine the number of carrier frequencies to be used for transmission and select a set of carrier frequencies for transmission from the set of candidate carrier frequencies 5:
- the reliability requirement of the data packet when the high layer transmits the data packet to the AS layer, it can simultaneously carry the reliability requirement information of the data packet.
- the UE may obtain a mapping relationship between the PPPP and the reliability requirement from the base station, or obtain a mapping relationship between the PPPP and the reliability requirement through pre-configuration, and obtain a reliability requirement according to the PPPP value mapping of the data packet.
- a new PC5 QoS parameter may be defined, and the high layer may carry the QoS parameter of the data packet when transmitting the data packet to the AS layer, and the UE may derive the reliability requirement of the data packet according to the newly defined QoS parameter;
- Packet delay budget of the data packet when the high layer transmits the data packet to the AS layer, it can simultaneously carry the packet delay budget requirement information of the data packet.
- the UE can obtain a mapping relationship between the PPPP and the packet delay budget requirement, and obtain a packet delay budget requirement according to the PPPP value mapping of the data packet.
- the UE may obtain a mapping relationship between the PPPP and the packet delay budget requirement from the base station, or obtain the pre-configuration manner;
- Priority priority of the data packet when the high layer transmits the data packet to the AS layer, it can carry the priority information of the data packet at the same time, and the priority can be represented by the PPPP value.
- the data rate requirement of the data packet when the high layer transmits the data packet to the AS layer, it can simultaneously carry the data rate requirement information of the data packet.
- the UE may obtain a mapping relationship between the PPPP and the data rate requirement from the base station, or obtain a mapping relationship between the PPPP and the data rate requirement through pre-configuration, and obtain a data rate requirement according to the PPPP value mapping of the data packet.
- a new PC5 QoS parameter may be defined.
- the QoS parameter of the data packet may be carried at the same time, and the UE may derive the data rate requirement of the data packet according to the newly defined QoS parameter.
- the UE may determine whether it is required to perform PC5 data transmission in at least one of a data split and a data duplication manner by using multiple carrier frequencies:
- the UE determines whether the PC5 data transmission can be performed using multiple carrier frequencies according to the priority of the data to be transmitted and the priority threshold information. For example, if the priority value of the data to be transmitted (eg, PPPP) is less than the configured priority threshold, then multiple carrier frequencies can be used for PC5 data transmission.
- the priority value of the data to be transmitted eg, PPPP
- the UE determines whether the PC5 data transmission can be performed using multiple carrier frequencies according to the Data rate requirement and the Data rate threshold information of the data to be transmitted. For example, if the data rate requirement for transmitting data is greater than the configured Data rate threshold, then multiple carrier frequencies can be used for PC5 data transmission.
- the UE determines whether the PC5 data transmission can be performed using multiple carrier frequencies according to the buffer size of the current logical channel and the Buffer size threshold information. For example, if the buffer size of the current logical channel is greater than the configured Buffer size threshold, multiple carrier frequencies can be used for PC5 data transmission.
- the UE determines whether the PC5 data transmission can be performed using multiple carrier frequencies according to the reliability requirement and the reliability threshold information of the data to be transmitted. For example, if the reliability requirement of the transmitted data is higher than the configured reliability threshold, the multi-carrier frequency can be used for PC5 data transmission.
- the UE determines whether the PC5 data transmission can be performed using multiple carrier frequencies according to the packet delay budget and the packet delay budget threshold information of the data to be transmitted. For example, if the packet delay budget for transmitting data is less than the configured packet delay budget threshold, multiple carrier frequencies can be used for PC5 data transmission.
- determining the number of carrier frequencies for transmission and selecting a carrier frequency set for transmission from the candidate carrier frequency set 5 can be seen in the following examples.
- the UE may first select the first carrier frequency 1 in the candidate carrier frequency set 5 according to the carrier frequency list sorted according to the CBR measurement result in S806, and determine, according to the sensing result, that the available resources in the resource pool on the carrier frequency can satisfy the delay. If the data transmission requirement in the buffer is within the budget, only the carrier frequency 1 is used for data transmission; if it is not satisfied, the carrier frequency 2 of the second order is continuously added for transmission, and the resources on the carrier frequencies 1 and 2 are judged according to the sensing result.
- the carrier frequency 1 and the carrier frequency 2 are used for data transmission; if not, the carrier frequency selection is continued, and the third carrier frequency 3 is added, followed by The operation is similar to the above.
- Example 2 Judging according to the configured buffer size range and packet delay budget and the corresponding carrier frequency
- the UE obtains a mapping relationship between the buffer size range and the packet delay budget and the number of carriers from the base station.
- the UE determines the number of carrier frequencies to be used according to the current buffer size and the packet delay budget and selects the carrier frequency for transmission in the candidate carrier frequency set 5.
- the base station may configure a buffer size of 200-400 bytes for the UE, a packet delay budget of 50 ms, a carrier frequency of 2, a buffer size of 200-400 bytes, and a packet delay budget of 100 ms corresponding to a carrier frequency of 1.
- the UE needs to re-determine the number of carrier frequencies to be used after each range in which the buffer size is changed, and select the carrier frequency for transmission in the candidate carrier frequency set 5.
- the UE then performs a resource selection procedure in the selected V2X resource pool within the carrier frequency for transmission to select a particular time-frequency domain resource for transmission.
- Example 3 Judging according to the configured buffer size range and the corresponding carrier frequency
- the base station can configure the number of available carrier frequencies corresponding to the buffer size range for the UE, or the UE can obtain the pre-configured mode.
- the UE determines the number of carrier frequencies to be used by the logical channel according to the buffer size of the current logical channel and the mapping relationship. For example, if the buffer size is 0-200 bytes for one carrier frequency and the buffer size is 200-400 bytes for two carrier frequencies, if the buffer size of the current logical channel is 350 bytes, the UE determines that Use 2 carrier frequencies for transmission. In this example case, the number of carrier frequencies to be used is re-determined once the range of the buffer size of the logical channel changes, and the carrier frequency for transmission is selected in the candidate carrier frequency set 5. The UE then performs a resource selection procedure in the selected V2X resource pool within the carrier frequency for transmission to select a particular time-frequency domain resource for transmission.
- Example 4 Judging according to the configured data rate range and the corresponding carrier frequency
- the base station can configure a mapping relationship between the data rate range and the number of carrier frequencies for the UE.
- the UE determines the number of carrier frequencies to be used according to the data rate requirement of the V2X data to be transmitted and the mapping relationship.
- the UE selects a carrier frequency for transmission in the candidate carrier frequency set 5.
- the upper layer transmits the data packet to the AS layer, it can simultaneously carry the data rate requirement information of the data packet.
- the UE may obtain a mapping relationship between the PPPP and the data rate requirement from the base station, or obtain a mapping relationship between the PPPP and the data rate requirement through pre-configuration, and obtain a data rate requirement according to the PPPP value mapping of the data packet.
- a new PC5 QoS parameter may be defined.
- the QoS parameter of the data packet may be carried at the same time, and the UE may derive the data rate requirement of the data packet according to the newly defined QoS parameter.
- the number of carrier frequencies to be used is re-determined once the range in which the data rate requirement of the logical channel is changed, and the carrier frequency for transmission is selected in the candidate carrier frequency set 5.
- the UE then performs a resource selection procedure in the selected V2X resource pool within the carrier frequency for transmission to select a particular time-frequency domain resource for transmission.
- Example 5 Judging according to the configured reliability range and the corresponding carrier frequency
- the base station can configure a mapping relationship between the reliability range and the number of carrier frequencies for the UE.
- the UE determines the number of carrier frequencies to be used according to the reliability requirement of the V2X service and the mapping relationship.
- the UE selects the carrier frequency for transmission in the candidate carrier frequency set 5.
- a high layer transmits a data packet to the AS layer, it can simultaneously carry the reliability requirement information of the data packet.
- the UE may obtain a mapping relationship between the PPPP and the reliability requirement from the base station, or obtain a mapping relationship between the PPPP and the reliability requirement through pre-configuration, and obtain a reliability requirement according to the PPPP value mapping of the data packet.
- a new PC5 QoS parameter may be defined.
- the QoS parameter of the data packet may be carried at the same time, and the UE may derive the reliability requirement of the data packet according to the newly defined QoS parameter.
- the number of carrier frequencies to be used is re-determined once the range in which the reliability requirements of the logical channel are changed, and the carrier frequency for transmission is selected in the candidate carrier frequency set 5.
- the UE then performs a resource selection procedure in the selected V2X resource pool within the carrier frequency for transmission to select a particular time-frequency domain resource for transmission.
- Example 6 SPS data adopts carrier frequency selection under data offload mode
- the UE may determine the number of resource RBs/retransmissions/MCS that can be selected on the resource pool of a certain frequency point according to the CBR measurement result of the resource pool at the frequency point and the PPPP corresponding to the highest priority logical channel. (Modulation and Coding Scheme), determine the size of the resource that can be transmitted on a single carrier frequency, and then determine whether the data split mode needs to be used for multi-carrier frequency data transmission according to the packet size, and if necessary, further determine that the data packet needs to be split into several On the carrier frequency.
- Modulation and Coding Scheme Modulation and Coding Scheme
- the UE After determining the number of split carrier frequencies, the UE determines a reservation interval and a HARQ (Hybrid Automatic Repeat reQuest) number of retransmissions on each carrier frequency, and then performs resource selection on each carrier frequency and starts SPS transmission;
- HARQ Hybrid Automatic Repeat reQuest
- the UE may determine whether to use the data split mode to perform multi-carrier frequency data transmission according to the CBR measurement result of the resource pool at the frequency point and the period of the data packet, and further determine that the data packet needs to be split to several carrier frequencies if necessary. After determining the number of split carrier frequencies, the UE determines the reservation interval and the number of HARQ retransmissions on each carrier frequency, and then performs resource selection on each carrier frequency and starts SPS transmission;
- each carrier frequency uses a separate SL process, and each SL process corresponds to a separate SL_RESOURCE_RESELECTION_COUNTER.
- Embodiment 4 is a diagrammatic representation of Embodiment 4:
- the present embodiment uses the V2X sender device as the UE as an example, and the UE is in the RRC connection state and uses mode 4.
- the method for selecting a transmit carrier frequency of the mode 4 UE in the RRC connected state includes: step S901 to step S906.
- step S901 the UE sends an RRC message to the base station when the condition is met (for example, there is V2X service data to be transmitted).
- the RRC message sent by the UE may be a sidelink UE information message or a UE assistance information message, including a frequency point requesting a V2X sidelink transmission resource and a corresponding target ID list (v2x-DestinationInfoList, the base station may derive a corresponding V2X service identifier by using the target ID. ).
- the V2X carrier frequency included in the RRC message sent by the UE is obtained by the UE according to the mapping between the service identifier of the data to be transmitted and the service identifier and the carrier frequency to obtain the candidate carrier frequency set 1 (ie, the initial candidate carrier frequency set), or the UE according to the UE
- the intersection between the candidate carrier set 1 obtained by the service identifier mapping of the data to be transmitted and the V2X carrier frequency set supported by the base station for example, including the serving carrier frequency and the V2X inter-frequency frequency point transmitted by the base station to the UE, that is, the candidate carrier frequency set 2.
- the RRC message includes the logical channel identifier of the resource to be requested and the corresponding QoS information, or the target identifier and the corresponding QoS information, or the logical channel group identifier and the corresponding QoS information, that is, the corresponding data to be transmitted.
- QoS information if the V2X data of the same target ID includes multiple QoS requirements, the PC5 signaling includes only the highest QoS requirement information among multiple QoS requirements; if the same logical channel group can be used to transmit multiple QoS requirements. The data of the PC5 signaling contains only the highest QoS requirement information among the multiple QoS requirements.
- the QoS information includes one or a combination of: data rate requirement, reliability requirement, priority, packet delay budget.
- the reliability requirement can be reliability level information.
- the RRC message includes synchronization timing information of each carrier frequency.
- the carrier selection auxiliary information sent by the UE to the base station includes at least one of the following information:
- Multi-carrier frequency indication information wherein the multi-carrier frequency indication information is used to indicate whether to use multi-carrier frequency transmission, or whether to use multi-carrier frequency data split transmission, or whether to use multi-carrier frequency data duplication transmission, or whether to use multi-carrier frequency data split And data duplication transmission;
- Synchronization timing information of each carrier including one or a combination of the following: synchronization reference type (UE, GNSS, base station); coverage status of the synchronization source (used to indicate whether the synchronization source is in coverage or out of coverage); synchronization source absolute timing value ;
- step S902 the eNB sends an RRC Connection Reconfiguration (RRC Connection Reconfiguration) to the UE, which includes resource allocation mode indication information (mode 4) and corresponding configuration information.
- RRC Connection Reconfiguration RRC Connection Reconfiguration
- mode 4 resource allocation mode indication information
- the base station may determine, according to the information in the RRC message received from the UE, the resource allocation mode indication information of the UE, and send corresponding configuration information to the UE. In an embodiment, the base station selects the timing aligned carrier frequency as the V2X carrier frequency set according to the synchronization timing information of each carrier frequency reported by the UE. In an embodiment, if the base station configures the UE to use the mode 4 resource allocation mode, the base station may use the carrier frequency set 1 or the candidate carrier frequency set 2 in the candidate carrier frequency set 2 reported by the UE (the UE or other UE that includes the requested resource). The CBR measurement result of the resource pool selects the V2X carrier frequency that can be used for UE transmission to obtain the candidate carrier frequency set 3. The V2X carrier frequency set sent by the base station to the UE can be sorted according to the CBR value of the resource pool on each carrier frequency, for example, the CBR value is the lowest. The carrier frequency/resource pool is ranked first.
- the base station may further determine whether to adopt multi-carrier transmission, determine the number of carrier frequencies, or determine carrier frequency split ratio configuration information according to the QoS information reported by the UE.
- these processes can also be performed by the UE itself.
- the base station may determine, according to the QoS information reported by the UE, whether the corresponding logical channel, or the logical channel group, or the data packet corresponding to the target identifier is transmitted by using multi-carrier data duplication and /data split mode. For example, the base station may calculate the reliability requirement according to the PPPP value reported by the UE, the mapping relationship between the PPPP and the reliability requirement, and then determine whether to use the multi-carrier data duplication mode according to the reliability requirement. Alternatively, the base station may determine whether to use the multi-carrier data duplication mode according to the reliability requirement information reported by the UE.
- the base station may calculate the data rate requirement according to the data rate reported by the UE, the mapping relationship between the PPPP and the data rate, and then determine whether to use the multi-carrier data split mode according to the data rate requirement.
- the base station may also determine whether to use the multi-carrier data split mode transmission according to the data rate requirement information reported by the UE.
- the base station determines that the UE needs to transmit by using multi-carrier data duplication and /data split mode, the multi-carrier frequency indication information is sent to the UE.
- the carrier frequency selection control information sent by the base station to the UE by using the system message or the RRC dedicated signaling may include at least one of the following information:
- Carrier frequency list :
- the number of carrier frequencies indicating the number of carrier frequencies to be used or the maximum number of carrier frequencies that can be used;
- Target identification or target index number 4.
- Priority threshold For example, if the PPPP value of the data packet is greater than the priority threshold, the PC5CA function is not used. If the PPPP value of the data packet is less than the priority threshold, the PC5CA function, including data, can be used. Split,data duplication;
- step S903 the UE performs PC5 data transmission using the carrier frequency in the candidate carrier frequency set 3 acquired from the base station, and the base station performs the above-mentioned carrier frequency selection process; or, the UE is in the candidate carrier frequency set 3 received from the base station.
- the carrier frequency selection is performed, and the carrier frequency selection is performed by the UE at this time.
- the UE performs subsequent carrier frequency selection (including the number of carrier frequencies and the specific carrier frequency) in the corresponding carrier frequency list for the data in the logical channel. And resource selection.
- the UE performs subsequent carrier frequency selection and resource selection in the corresponding carrier frequency list for the data in the logical channel group.
- the UE performs subsequent carrier frequency selection and resource selection in the corresponding carrier frequency list according to the target identifier of the data.
- the UE performs CBR measurement on the resource pool of the V2X carrier frequency in the V2X carrier frequency list configured by the base station (ie, the candidate carrier frequency set 3).
- the V2X carrier frequency The resource pool information is obtained by the UE from the base station.
- the UE filters the timing aligned carrier frequency as a V2X carrier frequency set according to the synchronization timing information on each carrier frequency.
- the CBR threshold is used to determine whether the carrier frequency of the V2X resource pool is available for PC5 transmission. If the UE obtains the CBR threshold value and the corresponding carrier frequency from the base station, the UE uses the corresponding CBR threshold value on the carrier frequency; if the UE obtains the CBR threshold value and the corresponding resource pool from the base station, the UE is in the resource. The corresponding CBR threshold is used on the pool; if the UE obtains the CBR threshold and the corresponding priority from the base station, the UE determines the corresponding CBR gate according to the priority of the data to be transmitted or the priority of the data transmitted on the logical channel. Limit.
- the UE determines the corresponding CBR threshold according to the data rate requirement of the data to be transmitted or the data rate requirement of the data transmitted by the logical channel. If the UE obtains the CBR threshold and the corresponding reliablility from the base station, the UE determines the corresponding CBR threshold according to the reliablility requirement of the data to be transmitted or the reliablility requirement of the data transmitted on the logical channel. If the UE obtains the CBR threshold and the corresponding packet delay budget requirement from the base station, the UE determines the corresponding CBR threshold according to the packet delay budget requirement of the data to be transmitted or the packet delay budget requirement of the data transmitted by the logical channel.
- the UE determines whether the carrier frequency of the measured resource pool is available for transmission according to the CBR measurement result of the V2X resource pool on each carrier frequency. For example, if the CBR measurement result of the resource pool is higher than the corresponding CBR threshold, the UE considers that The carrier frequency is not available for transmission; if the CBR measurement result of the resource pool is lower than the corresponding CBR threshold, the UE considers that the carrier frequency is available for transmission.
- the UE filters out the candidate carrier frequency set 4 according to the CBR measurement process of the resource pool of the V2X list configured by the base station, that is, the carrier frequency that is not available for transmission is excluded. In an embodiment, the UE sorts the candidate carrier frequency set 4 intermediate frequency points according to the CBR measurement values of the frequency points. For example, if the carrier frequency is sorted according to the CBR measurement value from small to large, the CBR measurement value is the smallest frequency point row. In the first place, and so on.
- step S904 it is determined whether or not PC5 data transmission is performed using multiple carrier frequencies.
- the UE may determine, according to the configuration information received from the base station, whether to use the multi-carrier frequency for PC5 data transmission, including in the data split and data duplication manners. At least one of:
- the UE determines, according to the multi-carrier frequency indication information, whether the corresponding logical channel uses multiple carrier frequencies for PC5 data transmission;
- the configuration information received by the UE from the base station includes the logical channel group identifier and the corresponding multi-carrier frequency indication information, determining, according to the multi-carrier frequency indication information, whether the corresponding logical channel group uses multiple carrier frequencies for PC5 data transmission;
- the UE determines, according to the multi-carrier frequency indication information, whether the corresponding target identification data uses multiple carrier frequencies for PC5 data transmission.
- the UE may also determine whether multi-carrier transmission is required based on the corresponding threshold information acquired from the base station, including but not limited to:
- the UE determines whether the PC5 data transmission can be performed using multiple carrier frequencies according to the priority of the data to be transmitted and the priority threshold information. For example, if the priority value (for example, PPPP) of the data to be transmitted is smaller than the configured priority threshold, the multi-carrier frequency can be used for PC5 data transmission;
- the priority value for example, PPPP
- the UE determines whether the PC5 data transmission can be performed using multiple carrier frequencies according to the data rate requirement and the data rate threshold information of the data to be transmitted. For example, if the data rate requirement of the data to be transmitted is greater than the configured data rate threshold, the multi-carrier frequency may be used for PC5 data transmission;
- the UE determines whether the PC5 data transmission can be performed using multiple carrier frequencies according to the buffer size of the current logical channel and the buffer size threshold information. For example, if the buffer size of the current logical channel is greater than the configured buffer size threshold, the multi-carrier frequency can be used for PC5 data transmission;
- the UE determines whether the PC5 data transmission can be performed using multiple carrier frequencies according to the reliability requirement and the reliability threshold information of the data to be transmitted. For example, if the reliability requirement of the transmitted data is higher than the configured reliability threshold, the multi-carrier frequency can be used for PC5 data transmission;
- the UE determines whether the PC5 data transmission can be performed using multiple carrier frequencies according to the packet delay budget and the packet delay budget threshold information of the data to be transmitted. For example, if the packet delay budget for transmitting data is less than the configured packet delay budget threshold, multiple carrier frequencies can be used for PC5 data transmission.
- step S905 the number of carrier frequencies is determined.
- the UE may determine the number of carrier frequencies to be used according to the service identification information or the QoS information of the data to be transmitted, and select a certain number of carriers in the candidate carrier frequency set 3 received from the base station or from the candidate carrier frequency set 4. frequency. If the base station performs the determination of the number of carrier frequencies, that is, the generation of the corresponding configuration information, the UE may obtain the carrier frequency quantity configuration information from the base station, and then select the candidate carrier frequency set 3 or the candidate candidate received from the base station according to the received carrier frequency quantity configuration information. A certain number of carrier frequencies are selected in the carrier frequency set 4. Specifically, it can be divided into the following situations:
- the UE transmits the carrier frequency of the corresponding carrier frequency for the data in the logical channel;
- the UE If the resource configuration information received by the UE from the base station includes the logical channel group identifier and the corresponding number of carrier frequencies, the UE transmits the carrier frequency of the corresponding carrier frequency for the data in the logical channel group;
- the UE selects a carrier frequency of the corresponding carrier frequency for the data to be transmitted of the same target identifier for transmission;
- the mapping relationship between the configured buffer size range and the number of carrier frequencies according to the range in which the current buffer size of the logical channel is located Determine the number of carrier frequencies to be used for the logical channel or the maximum number of carrier frequencies that can be used;
- the resource configuration information received by the UE from the base station includes the data rate range and the corresponding carrier frequency, the range of the data rate required by the UE according to the data transmission requirement to be transmitted, the configured data rate requirement range, and the number of carrier frequencies.
- the mapping relationship determines the number of carrier frequencies to be used for the logical channel or the maximum number of carrier frequencies that can be used;
- the mapping relationship between the configured reliability range and the number of carriers is determined according to the range in which the reliability requirement of the data to be transmitted by the UE is located.
- the resource configuration information received by the UE from the base station includes the packet delay budget range and the corresponding carrier frequency, the range of the packet delay budget and the number of carriers configured by the UE according to the range of the packet delay budget of the data to be transmitted.
- the mapping relationship determines the number of carrier frequencies to be used for the logical channel or the maximum number of carrier frequencies that can be used;
- the resource configuration information received by the UE from the base station includes a packet delay budget range and a buffer size range and a corresponding number of carrier frequencies, the range of the packet delay budget of the UE according to the data to be transmitted, and the current buffer size of the logical channel.
- the range of the configured packet delay budget range and the buffer size range and the number of carrier frequencies determines the number of carrier frequencies to be used for the logical channel or the maximum number of carrier frequencies that can be used;
- the base station may configure a buffer size of 200-400 bytes for the UE, a carrier delay budget of 50 ms, a carrier frequency of 2, a buffer size of 200-400 bytes, and a packet delay budget of 100 ms, and a carrier frequency of 1;
- the UE determines the logical channel according to the priority of the data transmitted by the logical channel, and the mapping relationship between the configured priority and the number of carriers. The number of carrier frequencies to use or the maximum number of carrier frequencies that can be used.
- step S906 the number of transmissions on each carrier frequency is determined.
- each selected carrier frequency for transmission is determined by itself. The amount of data to be transmitted is performed, and subsequent resource selection is performed on each carrier frequency according to the sensing result.
- the UE determines that the multi-carrier frequency is to be used for the PC5 data transmission, and the carrier frequency to be used for the transmission is determined, and the configuration information received by the UE from the base station includes the carrier frequency data offload ratio information, the UE offloads according to the carrier frequency data.
- the ratio information calculates the amount of data to be transmitted on each carrier frequency, and performs subsequent resource selection on each carrier frequency.
- the UE transmits the data in the logical channel using the carrier frequency in the corresponding carrier frequency list. And calculating the amount of data to be transmitted on each carrier frequency according to the configured split ratio of each carrier frequency data, and performing subsequent resource selection on each carrier frequency. For example, the amount of data to be transmitted in the current logical channel 1 is 200 bytes, and it is determined that the carrier frequency 1 and the carrier frequency 2 are transmitted. If the UE receives the configuration information from the base station, the data split ratio of the carrier frequency 1 is 60%. The data split ratio of frequency 2 is 40%, and the UE calculates that the amount of data that can be transmitted using carrier frequency 1 is 120 bytes, and the amount of data that can be transmitted using carrier frequency 2 is 80 bytes.
- the UE transmits the data in the logical channel group using the carrier frequency in the corresponding carrier frequency list, and according to the The configured split ratio of each carrier frequency data calculates the amount of data to be transmitted on each carrier frequency, and performs subsequent resource selection on each carrier frequency.
- the configuration information received by the UE from the base station includes the target identifier, the carrier frequency list, and the corresponding carrier frequency data offload ratio
- the data of the same target identifier is transmitted by the UE using the carrier frequency in the corresponding carrier frequency list, and according to the configured
- the carrier frequency ratio of each carrier frequency data calculates the amount of data to be transmitted on each carrier frequency, and performs subsequent resource selection on each carrier frequency.
- Embodiment 5 is a diagrammatic representation of Embodiment 5:
- the present embodiment uses the V2X transmitting device as the UE as an example, and the UE is in the RRC connected state and uses mode 3.
- the method for selecting a transmit carrier frequency of the mode 3 UE in the RRC connected state includes: step S1001 to step S1006.
- step S1001 the UE sends an RRC message to the base station when the condition is met (for example, there is V2X service data to be transmitted).
- the RRC message sent by the UE may be a sidelink UE information message or a UE assistance information message, including a frequency point requesting a V2X sidelink transmission resource and a corresponding target ID list (v2x-DestinationInfoList, the base station may derive a corresponding V2X service identifier by using the target ID. ).
- the V2X carrier frequency included in the RRC message sent by the UE is obtained by the UE according to the mapping between the service identifier of the data to be transmitted and the service identifier and the carrier frequency to obtain the candidate carrier frequency set 1 (ie, the initial candidate carrier frequency set), or the UE according to the UE
- the intersection between the candidate carrier set 1 obtained by the service identifier mapping of the data to be transmitted and the V2X carrier frequency set supported by the base station for example, including the serving carrier frequency and the V2X inter-frequency frequency point transmitted by the base station to the UE, that is, the candidate carrier frequency set 2.
- the RRC message includes the logical channel identifier of the resource to be requested and the corresponding QoS information, or the target identifier and the corresponding QoS information, or the logical channel group identifier and the corresponding QoS information, that is, the corresponding data to be transmitted.
- QoS information if the V2X data of the same target ID includes multiple QoS requirements, the PC5 signaling includes only the highest QoS requirement information among multiple QoS requirements; if the same logical channel group can be used to transmit multiple QoS requirements. The data of the PC5 signaling contains only the highest QoS requirement information among the multiple QoS requirements.
- the QoS information includes one or a combination of: data rate requirement, reliability requirement, priority, packet delay budget.
- the reliability requirement can be reliability level information.
- the RRC message includes synchronization timing information of each carrier frequency.
- the carrier selection auxiliary information sent by the UE to the base station includes at least one of the following information:
- Multi-carrier frequency indication information wherein the multi-carrier frequency indication information is used to indicate whether to use multi-carrier frequency transmission, or whether to use multi-carrier frequency data split transmission, or whether to use multi-carrier frequency data duplication transmission, or whether to use multi-carrier frequency data split And data duplication transmission;
- Synchronization timing information of each carrier including one or a combination of the following: synchronization reference type (UE, GNSS, base station); coverage status of the synchronization source (used to indicate whether the synchronization source is in coverage or out of coverage); synchronization source absolute timing value ;
- step S1002 the eNB sends RRC Connection Reconfiguration information (RRC Connection Reconfiguration) to the UE, which includes resource allocation mode indication information (mode 3) and corresponding configuration information.
- RRC Connection Reconfiguration RRC Connection Reconfiguration information
- mode 3 resource allocation mode indication information
- the base station may determine, according to the information in the RRC message received from the UE, the resource allocation mode indication information of the UE, and send corresponding configuration information to the UE. In an embodiment, the base station selects the timing aligned carrier frequency as the V2X carrier frequency set according to the synchronization timing information of each carrier frequency reported by the UE. In an embodiment, if the base station configures the UE to use the mode3 resource allocation mode, the base station may perform the carrier frequency set 1 or the candidate carrier frequency set 2 in the candidate carrier frequency set 2 reported by the UE (the UE or other UE that includes the requested resource). The CBR measurement result of the resource pool selects the V2X carrier frequency that can be used for UE transmission to obtain the candidate carrier frequency set 3. The V2X carrier frequency set sent by the base station to the UE can be sorted according to the CBR value of the resource pool on each carrier frequency, for example, the CBR value is the lowest. The carrier frequency/resource pool is ranked first.
- the base station may further determine, according to the QoS information reported by the UE, whether to adopt multiple carrier frequency transmission, or determine the number of carrier frequencies, or determine carrier frequency data offload proportion configuration information.
- these processes can also be performed by the UE itself.
- the base station may determine, according to the QoS information reported by the UE, whether the corresponding logical channel, or the logical channel group, or the data packet corresponding to the target identifier is transmitted by using multi-carrier data duplication and /data split mode. For example, the base station may calculate the reliability requirement according to the PPPP value reported by the UE, the mapping relationship between the PPPP and the reliability requirement, and then determine whether to use the multi-carrier data duplication mode according to the reliability requirement. Alternatively, the base station may determine whether to use the multi-carrier data duplication mode according to the reliability requirement information reported by the UE.
- the base station may calculate the data rate requirement according to the data rate reported by the UE, the mapping relationship between the PPPP and the data rate, and then determine whether to use the multi-carrier data split mode according to the data rate requirement.
- the base station may also determine whether to use the multi-carrier data split mode transmission according to the data rate requirement information reported by the UE.
- the base station determines that the UE needs to transmit by using multi-carrier data duplication and /data split mode, the multi-carrier frequency indication information is sent to the UE.
- the carrier frequency selection control information sent by the base station to the UE by using the system message or the RRC dedicated signaling may include at least one of the following information:
- Carrier frequency list :
- the number of carrier frequencies indicating the number of carrier frequencies to be used or the maximum number of carrier frequencies that can be used;
- Target identification or target index number 4.
- Priority threshold For example, if the PPPP value of the data packet is greater than the priority threshold, the PC5CA function is not used. If the PPPP value of the data packet is less than the priority threshold, the PC5CA function, including data, can be used. Split,data duplication;
- step S1003 the UE performs PC5 data transmission using the carrier frequency in the candidate carrier frequency set 3 acquired from the base station, and the base station performs the above-mentioned carrier frequency selection process; or, the UE is in the candidate carrier frequency set 3 received from the base station.
- the carrier frequency selection is performed, and the carrier frequency selection is performed by the UE at this time.
- the UE performs subsequent carrier frequency selection (including the number of carrier frequencies and the specific carrier frequency) in the corresponding carrier frequency list for the data in the logical channel. And resource selection.
- the UE performs subsequent carrier frequency selection and resource selection in the corresponding carrier frequency list for the data in the logical channel group.
- the UE performs subsequent carrier frequency selection and resource selection in the corresponding carrier frequency list according to the target identifier of the data.
- the UE performs CBR measurement on the resource pool of the V2X carrier frequency in the V2X carrier frequency list configured by the base station (ie, the candidate carrier frequency set 3).
- the V2X carrier frequency The resource pool information is obtained by the UE from the base station.
- the UE filters the timing aligned carrier frequency as a V2X carrier frequency set according to the synchronization timing information on each carrier frequency.
- the CBR threshold is used to determine whether the carrier frequency of the V2X resource pool is available for PC5 transmission. If the UE obtains the CBR threshold value and the corresponding carrier frequency from the base station, the UE uses the corresponding CBR threshold value on the carrier frequency; if the UE obtains the CBR threshold value and the corresponding resource pool from the base station, the UE is in the resource. The corresponding CBR threshold is used on the pool; if the UE obtains the CBR threshold and the corresponding priority from the base station, the UE determines the corresponding CBR gate according to the priority of the data to be transmitted or the priority of the data transmitted on the logical channel. Limit.
- the UE determines the corresponding CBR threshold according to the data rate requirement of the data to be transmitted or the data rate requirement of the data transmitted by the logical channel. If the UE obtains the CBR threshold and the corresponding reliablility from the base station, the UE determines the corresponding CBR threshold according to the reliablility requirement of the data to be transmitted or the reliablility requirement of the data transmitted on the logical channel. If the UE obtains the CBR threshold and the corresponding packet delay budget requirement from the base station, the UE determines the corresponding CBR threshold according to the packet delay budget requirement of the data to be transmitted or the packet delay budget requirement of the data transmitted by the logical channel.
- the UE determines whether the carrier frequency of the measured resource pool is available for transmission according to the CBR measurement result of the V2X resource pool on each carrier frequency. For example, if the CBR measurement result of the resource pool is higher than the corresponding CBR threshold, the UE considers that The carrier frequency is not available for transmission; if the CBR measurement result of the resource pool is lower than the corresponding CBR threshold, the UE considers that the carrier frequency is available for transmission.
- the UE filters out the candidate carrier frequency set 4 according to the CBR measurement process of the resource pool of the V2X list configured by the base station, that is, the carrier frequency that is not available for transmission is excluded. In an embodiment, the UE sorts the candidate carrier frequency set 4 intermediate frequency points according to the CBR measurement values of the frequency points. For example, if the carrier frequency is sorted according to the CBR measurement value from small to large, the CBR measurement value is the smallest frequency point row. In the first place, and so on.
- step S1004 it is determined whether or not PC5 data transmission is performed using multiple carrier frequencies.
- the UE may determine, according to the configuration information received from the base station, whether to use the multi-carrier frequency for PC5 data transmission, including in the data split and data duplication manners. At least one of:
- the UE determines, according to the multi-carrier frequency indication information, whether the corresponding logical channel uses multiple carrier frequencies for PC5 data transmission;
- the configuration information received by the UE from the base station includes the logical channel group identifier and the corresponding multi-carrier frequency indication information, determining, according to the multi-carrier frequency indication information, whether the corresponding logical channel group uses multiple carrier frequencies for PC5 data transmission;
- the UE determines, according to the multi-carrier frequency indication information, whether the corresponding target identification data uses multiple carrier frequencies for PC5 data transmission.
- the UE may also determine whether multi-carrier transmission is required based on the corresponding threshold information acquired from the base station, including but not limited to:
- the UE determines whether the PC5 data transmission can be performed using multiple carrier frequencies according to the priority of the data to be transmitted and the priority threshold information. For example, if the priority value of the data to be transmitted (for example, PPPP) is less than the configured priority threshold, the multi-carrier frequency can be used for PC5 data transmission;
- the UE determines whether the PC5 data transmission can be performed using multiple carrier frequencies according to the data rate requirement and the data rate threshold information of the data to be transmitted. For example, if the data rate requirement of the data to be transmitted is greater than the configured data rate threshold, the multi-carrier frequency may be used for PC5 data transmission;
- the UE determines whether the PC5 data transmission can be performed using multiple carrier frequencies according to the buffer size of the current logical channel and the buffer size threshold information. For example, if the buffer size of the current logical channel is greater than the configured buffer size threshold, the multi-carrier frequency can be used for PC5 data transmission;
- the UE determines whether the PC5 data transmission can be performed using multiple carrier frequencies according to the reliability requirement and the reliability threshold information of the data to be transmitted. For example, if the reliability requirement of the transmitted data is higher than the configured reliability threshold, the multi-carrier frequency can be used for PC5 data transmission;
- the UE determines whether the PC5 data transmission can be performed using multiple carrier frequencies according to the packet delay budget and the packet delay budget threshold information of the data to be transmitted. For example, if the packet delay budget for transmitting data is less than the configured packet delay budget threshold, multiple carrier frequencies can be used for PC5 data transmission.
- step S1005 the number of carrier frequencies is determined.
- the UE may determine the number of carrier frequencies to be used according to the service identification information or the QoS information of the data to be transmitted, and select a certain number of carriers in the candidate carrier frequency set 3 received from the base station or from the candidate carrier frequency set 4. frequency. If the base station performs the determination of the number of carrier frequencies, that is, the generation of the corresponding configuration information, the UE may obtain the carrier frequency quantity configuration information from the base station, and then select the candidate carrier frequency set 3 or the candidate candidate received from the base station according to the received carrier frequency quantity configuration information. A certain number of carrier frequencies are selected in the carrier frequency set 4. Specifically, it can be divided into the following situations:
- the UE transmits the carrier frequency of the corresponding carrier frequency for the data in the logical channel;
- the UE If the resource configuration information received by the UE from the base station includes the logical channel group identifier and the corresponding number of carrier frequencies, the UE transmits the carrier frequency of the corresponding carrier frequency for the data in the logical channel group;
- the UE selects a carrier frequency of the corresponding carrier frequency for the data to be transmitted of the same target identifier for transmission;
- the mapping relationship between the configured buffer size range and the number of carrier frequencies according to the range in which the current buffer size of the logical channel is located Determine the number of carrier frequencies to be used for the logical channel or the maximum number of carrier frequencies that can be used;
- the resource configuration information received by the UE from the base station includes the data rate range and the corresponding carrier frequency, the range of the data rate required by the UE according to the data transmission requirement to be transmitted, the configured data rate requirement range, and the number of carrier frequencies.
- the mapping relationship determines the number of carrier frequencies to be used for the logical channel or the maximum number of carrier frequencies that can be used;
- the mapping relationship between the configured reliability range and the number of carriers is determined according to the range in which the reliability requirement of the data to be transmitted by the UE is located.
- the resource configuration information received by the UE from the base station includes the packet delay budget range and the corresponding carrier frequency, the range of the packet delay budget and the number of carriers configured by the UE according to the range of the packet delay budget of the data to be transmitted.
- the mapping relationship determines the number of carrier frequencies to be used for the logical channel or the maximum number of carrier frequencies that can be used;
- the resource configuration information received by the UE from the base station includes a packet delay budget range and a buffer size range and a corresponding number of carrier frequencies, the range of the packet delay budget of the UE according to the data to be transmitted, and the current buffer size of the logical channel.
- the range of the configured packet delay budget range and the buffer size range and the number of carrier frequencies determines the number of carrier frequencies to be used for the logical channel or the maximum number of carrier frequencies that can be used;
- the base station may configure a buffer size of 200-400 bytes for the UE, a carrier delay budget of 50 ms, a carrier frequency of 2, a buffer size of 200-400 bytes, and a packet delay budget of 100 ms, and a carrier frequency of 1;
- the UE determines the logical channel according to the priority of the data transmitted by the logical channel, and the mapping relationship between the configured priority and the number of carriers. The number of carrier frequencies to use or the maximum number of carrier frequencies that can be used.
- step S1006 the number of transmissions required on each carrier frequency is determined.
- each selected carrier frequency for transmission is determined by itself.
- the amount of data to be transmitted is sent to the base station to send a BSR (Buffer Status Report) to request the PC5 to transmit resources on the corresponding carrier frequency.
- BSR Buffer Status Report
- the UE determines that the multi-carrier frequency is to be used for the PC5 data transmission, and the carrier frequency to be used for the transmission is determined, and the configuration information received by the UE from the base station includes the carrier frequency data offload ratio information, the UE offloads according to the carrier frequency data.
- the ratio information calculates the amount of data to be transmitted on each carrier frequency, and sends a BSR to the base station to request the PC5 to transmit resources on the corresponding carrier frequency.
- the UE transmits the data in the logical channel using the carrier frequency in the corresponding carrier frequency list. And calculating the amount of data to be transmitted on each carrier frequency according to the configured split ratio of each carrier frequency data, and sending a BSR to the base station to request the PC5 to transmit resources on the corresponding carrier frequency. For example, the amount of data to be transmitted in the current logical channel 1 is 200 bytes, and it is determined that the carrier frequency 1 and the carrier frequency 2 are transmitted. If the UE receives the configuration information from the base station, the data split ratio of the carrier frequency 1 is 80%. The data split ratio of frequency 2 is 20%, and the UE calculates that the amount of data that can be transmitted using carrier frequency 1 is 160 bytes, and the amount of data that can be transmitted using carrier frequency 2 is 40 bytes.
- the UE transmits the data in the logical channel group using the carrier frequency in the corresponding carrier frequency list, and according to the The configured split ratio of each carrier frequency data calculates the amount of data to be transmitted on each carrier frequency, and sends a BSR to the base station to request PC5 to transmit resources on the corresponding carrier frequency.
- the configuration information received by the UE from the base station includes the target identifier, the carrier frequency list, and the corresponding carrier frequency data offload ratio
- the data of the same target identifier is transmitted by the UE using the carrier frequency in the corresponding carrier frequency list, and according to the configured
- the carrier frequency split ratio of each carrier frequency calculates the amount of data to be transmitted on each carrier frequency, and sends a BSR to the base station to request PC5 to transmit resources on the corresponding carrier frequency.
- the carrier frequency selection method provided by the embodiment can realize multi-carrier frequency communication between vehicle users in the coverage area of the base station (see FIG. 11 and FIG. 12) and multi-carrier frequency communication between vehicles in the non-covered area. (See FIG. 13), and when the vehicle user is in the coverage area of the base station, the carrier frequency used between the vehicle users and the carrier frequency used for communication with the base station may be the same and may be different.
- the vehicle UE1 and the Vehicle UE2 in FIG. 11 communicate with each other using carrier frequencies f2 and f3, and the Vehicle UE2 communicates with the base station eNB by using the carrier frequency f1.
- FIG. 11 the carrier frequencies used between the vehicle users and the carrier frequency used for communication with the base station may be the same and may be different.
- the vehicle UE1 and the Vehicle UE2 in FIG. 11 communicate with each other using carrier frequencies f2 and f3
- the Vehicle UE2 communicates with the base station eNB by using the carrier frequency f1.
- Vehicle UE1 and Vehicle UE2 communicate with each other using carrier frequencies f1 and f2, and Vehicle UE2 communicates with the base station eNB with carrier frequency f1.
- the communication UE1 and the vehicle UE2 in the no-coverage area use the carrier frequencies f2 and f3 for communication.
- the carrier frequency used by the Vehicle UE1 and the Vehicle UE2 is not limited to the two illustrated, and the specific number selected according to the specific application scenario may be different.
- the V2X communication receiving end device (which may also be an in-vehicle terminal or a user terminal) has a limited receiving capability, and has V2X service data transmitted by the transmitting party through multiple carrier frequencies. There may be no ability to receive V2X service data transmitted on the multiple carrier frequencies at the same time. In this case, it is necessary to improve the phenomenon that the receiver UE with limited reception capability determines the carrier frequency to be received.
- the embodiment further provides a PC5 carrier frequency selection method for implementing the selection of the receiving carrier frequency.
- the method includes: step S141 and step S142.
- step S141 the priority corresponding to the service identifier or the service identifier list sorted by priority is obtained.
- the V2X receiving end device can receive the service identifier and the corresponding priority value or the service identifier list from the base station.
- the service identifier list is a list sorted according to the receiving priority of the service, for example, the service with the highest priority is ranked first, and so on.
- the base station may send the service identifier and the corresponding priority, or the service identifier list, to the UE by using the system message or the RRC dedicated signaling.
- the V2X receiving device may obtain the service identifier and the corresponding priority, or the service identifier list, based on the pre-configuration mode or from the V2X control fuction or the V2X application server.
- step S142 according to the priority corresponding to the service identifier or the service identifier list sorted by priority, the carrier frequency corresponding to the M higher priority services that can be simultaneously received in the range supported by the PC5 multi-carrier receiving capability is selected.
- the M is an integer greater than or equal to 1.
- the receiver UE may determine the V2X service identifier that is of interest to itself, and obtain a V2X carrier frequency set that is interested in receiving according to the mapping relationship between the service identifier and the V2X carrier frequency. That is, the V2X receiving end device obtains the carrier frequency corresponding to each target service identifier according to the obtained target service identifier and the preset service identifier and the carrier frequency mapping relationship. The V2X receiving end device determines, according to its PC5 multi-carrier frequency receiving capability information, that V2X service data cannot be received at the same carrier frequency that is interested in receiving, and the priority corresponding to the service identifier of each service is in descending order.
- M services that can perform reception simultaneously are selected. Then, the V2X receiving end device obtains a carrier frequency set to be received according to the V2X service that can simultaneously perform the receiving, and the mapping relationship between the V2X service identifier and the V2X carrier frequency; or, within the range supported by the PC5 multi-carrier frequency receiving capability information, The order in the service identification list sequentially selects carrier frequencies corresponding to M services that can be received simultaneously as the receiving carrier frequency.
- the PC5 multi-carrier frequency receiving capability information includes band combination band combination information supporting simultaneous PC5 reception, and supports at least the band combination information of the band combination received by the PC5 and the Uu and the Rx chain information of the reception link.
- the embodiment also provides a PC5 carrier frequency selection device, which can be disposed in the V2X receiving device, as shown in FIG. 15, and includes a service acquisition module 151 and a carrier frequency acquisition module 152.
- the service obtaining module 151 is configured to obtain a priority corresponding to the service identifier or a service identifier list sorted by priority.
- the service obtaining module 151 may receive the service identifier and the corresponding priority value or the service identifier list from the base station.
- the service identifier list is a list in which the base station sorts according to the priority of the service, for example, the service with the highest priority is ranked first, and so on.
- the base station may send the service identifier and the corresponding priority, or the service identifier list, to the UE by using the system message or the RRC dedicated signaling.
- the V2X receiving device may obtain the service identifier and the corresponding priority, or the service identifier list, based on the pre-configuration mode or from the V2X control function or the V2X application server. Then, the V2X receiving device can obtain the target service identifier from the obtained service identifier (the service identifier of interest can be selected as the target service identifier according to the user's selection or other factors).
- the carrier frequency obtaining module 152 is configured to select M higher priorities that can be simultaneously received within the range supported by the PC5 multi-carrier receiving capability according to the priority corresponding to the service identifier or the service identifier list sorted by the receiving priority.
- the carrier frequency corresponding to the service is used as the receiving carrier frequency, and the M is an integer greater than or equal to 1.
- the carrier frequency acquisition module 152 may be configured to determine, according to the PC5 multi-carrier frequency receiving capability information of the V2X receiving device, that the V2X receiving device cannot simultaneously receive the V2X service data on the carrier frequency corresponding to each target service identifier. Selecting M carrier frequencies that can be simultaneously received in the range supported by the PC5 multi-carrier receiving capability information as the receiving carrier frequency according to the order of priority of each target service identifier from high to low;
- the PC5 multi-carrier frequency receiving capability information includes band combination band combination information supporting simultaneous PC5 reception, and supports at least the band combination information of the band combination received by the PC5 and the Uu and the Rx chain information of the reception link.
- the embodiment further provides a V2X receiving end device, as shown in FIG. 16, the V2X receiving end device includes a third processor 161, a third memory 162, and a third communication bus 163;
- the third communication bus 163 is configured to implement connection communication between the third processor 161 and the third memory 162;
- the third processor 161 is arranged to execute one or more third programs stored in the third memory 162 to implement the steps of the PC5 carrier frequency selection method as described above;
- the third processor 161 is arranged to execute one or more fourth programs stored in the third memory 162 to implement the steps of the V2X service data receiving method as described above.
- the embodiment further provides a computer storage medium storing one or more programs, the one or more programs being executed by one or more processors to implement the PC5 as described above.
- the steps of the frequency selection method are not limited to:
- the present embodiment is described by taking a receiving receiver frequency selection method of a complete receiver UE as an example. Referring to FIG. 17, the method includes: step S171, step S172, and step S173.
- step S171 the receiver UE acquires the service identifier and the corresponding priority value or service identifier list.
- the UE may receive the service identifier and the corresponding priority value or the service identifier list from the base station.
- the service identifier list is a list in which the base station sorts according to the priority of the service, for example, the service with the highest priority is ranked first, and so on.
- the base station may send the service identifier and the corresponding priority, or the service identifier list, to the UE by using the system message or the RRC dedicated signaling.
- the UE may obtain the service identifier and the corresponding priority, or the service identifier list, based on the pre-configuration manner or from the V2X control function or the V2X application server.
- step S172 the receiver UE determines the V2X service identifier that is of interest to itself, and obtains a V2X carrier frequency set that is interested in receiving according to the mapping relationship between the V2X service identifier and the V2X carrier frequency.
- step S173 the receiver UE determines the carrier frequency set that can be simultaneously monitored according to the receiving capability of the PC5CA, and selects the carrier frequency.
- the UE if the UE cannot simultaneously listen in the V2X carrier frequency set of interest, according to the service identifier and the corresponding priority, or the service identification list, according to the priority of the service, the V2X is of interest from high to low. Select a V2X service that can be monitored at the same time in the service. Finally, the receiver UE obtains a carrier frequency set to be simultaneously monitored according to the V2X service that can be simultaneously monitored, and the mapping relationship between the V2X service identifier and the V2X carrier frequency.
- the PC5CA receiving capability information of the UE includes one or a combination of: 1) band combination information received by the PC 5 at the same time; 2) band combination information received by the PC5/Uu at the same time; 3) the number of Rx chains;
- V2X service 1 can be transmitted on frequency 1
- V2X service 2 can be transmitted on frequency 3
- V2X service 3 can be transmitted on frequency 6, 7, and the priority is ranked from high to low: V2X service 1, V2X service 2, V2X service 3, assuming that the UE is interested in the V2X service 1, 2, 4, but according to the PC5CA capability of the UE, it can only simultaneously monitor on two PC5 frequency points, then the UE determines that only the V2X service 1
- the corresponding f1 and f2 are monitored to ensure that the high priority service data of interest is received, and the satisfaction of the user experience is improved.
- modules or steps of the above embodiments of the present application can be implemented by a general computing device, which can be concentrated on a single computing device or distributed among multiple computing devices.
- they may be implemented by program code executable by a computing device such that they may be stored by a computing device in a computer storage medium (ROM/RAM, diskette, optical disk), and
- ROM/RAM read-only memory
- the steps shown or described may be performed in an order different than that herein, or they may be separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof may be fabricated into a single integrated circuit module. to fulfill. Therefore, the application is not limited to any particular combination of hardware and software.
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Abstract
公开了一种PC5载频选择方法以及装置、设备和基站,所述方法包括:根据V2X业务数据的业务标识和业务标识与载频映射关系得到所述V2X业务数据的初始候选载频集合;根据载频选择信息从所述初始候选载频集合中选择所述V2X业务数据的传输载频。
Description
本申请要求在2017年11月16日提交中国专利局、申请号为201711140295.2的中国专利申请的优先权,该申请的全部内容通过引用结合在本申请中。
本申请涉及通信领域,例如涉及一种PC5载频选择方法以及装置、设备和基站。
随着通信技术的发展及需求的丰富,无线通信的应用场景也日益广泛,其中比较典型的是车联网(Vehicle Networking)。所谓的车联网,是车辆可以参与到无线通信中,通过利用先进的无线蜂窝通信技术,实现车与车,车与路侧基础设施间的实时信息交互,告知彼此目前的状态(包括车辆的位置,速度,加速度,行驶路径)及获知的道路环境信息,协作感知道路危险状况,及时提供多种碰撞预警信息,防止道路交通安全事故的发生。目前,车联网通信的模式具体分为三种:车车通信(Vehicle-to-Vehicle Communications,V2V),车网通信(Vehicle-to-Infrastructure Communications,V2I),车人通信(Vehicle-to-Pedestrian,V2P)三类,这三类也可以统称为V2X(Vehicle-to-Everything)通信。
在V2X车联网通信模式下,V2X消息的传输可以广播的方式进行传输,广播的一种实现方式是基于UE到UE的直接发现/通信(sidelink,ProSe,D2D)支持通过PC5接口(在3GPP Rel-12中引入的一个UE与UE之间进行直接交互的接口,称为PC5接口)进行V2X消息的广播传输。随着V2X通信发展,V2X业务数据高可靠性和高速率传输中的至少一个的需求日益迫切,就要求同一个V2X业务数据需要采用多个载频进行传输,此时对于用于进行数据传输的载频选择的准确性要求也就越来越高。对应的,对于接受方UE,由于其接收能力受限,对于发送方通过多个载频发送的V2X业务数据,有可能没有能力同时接收到这多个载频上发送的V2X业务数据,此时就需要改善接收能力受限的接收方UE如何确定需接收的载频的现象。
发明内容
本申请实施例提供的一种PC5载频选择、V2X业务数据发送及接收方法、装置及设备,可以提升载频选择的准确性,以及改善V2X接收方接收能力受限时如何确定需要接收的载频的现象。
本申请实施例提供一种PC5载频选择方法,包括:根据V2X业务数据的业务标识和业务标识与载频映射关系得到所述V2X业务数据的初始候选载频集合;根据载频选择信息从所述初始候选载频集合中选择所述V2X业务数据的传输载频。
本申请实施例还提供一种PC5载频选择方法,包括:接收V2X发送端设备发送的载频选择辅助信息,所述载频选择辅助信息包括根据V2X业务数据的业务标识和业务标识与载频映射关系得到所述V2X业务数据的初始候选载频集合;向所述V2X发送端设备发送载频选择控制信息。
本申请实施例还提供一种PC5载频选择方法,包括:获得业务标识对应的优先级或以优先级排序的业务标识列表;根据业务标识对应的优先级或以接收优先级排序的业务标识列表,选择在所述PC5多载频接收能力支持的范围内能同时接收的M个较高优先级的业务对应的载频作为接收载频,所述M为大于等于1的整数。
本申请实施例还提供一种PC5载频选择装置,包括:
初始选择模块,设置为根据V2X业务数据的业务标识和业务标识与载频映射关系得到所述V2X业务数据的初始候选载频集合;
载频确定模块,设置为根据载频选择信息从所述初始候选载频集合中选择所述V2X业务数据的传输载频。
本申请实施例还提供一种PC5载频选择装置,包括:
信息接收模块,设置为接收V2X发送端设备发送的载频选择辅助信息,所述载频选择辅助信息包括根据V2X业务数据的业务标识和业务标识与载频映射关系得到所述V2X业务数据的初始候选载频集合;
配置处理模块,设置为向所述V2X发送端设备发送载频选择控制信息。
本申请实施例还提供一种PC5载频选择装置,包括:
业务获取模块,设置为获得业务标识对应的优先级或以优先级排序的业务标识列表;
载频获取模块,设置为根据业务标识对应的优先级或以接收优先级排序的 业务标识列表,选择在所述PC5多载频接收能力支持的范围内能同时接收的M个较高优先级的业务对应的载频作为接收载频,所述M为大于等于1的整数。
本申请实施例还提供一种V2X发送端设备,所述V2X发送端设备包括第一处理器、第一存储器及第一通信总线;
所述第一通信总线设置为实现第一处理器和第一存储器之间的连接通信;
所述第一处理器设置为执行第一存储器中存储的一个或者多个第一程序,以实现如上所述的PC5载频选择方法的步骤。
本申请实施例还提供一种基站,所述基站包括第二处理器、第二存储器及第二通信总线;
所述第二通信总线设置为实现第二处理器和第二存储器之间的连接通信;
所述第二处理器设置为执行第二存储器中存储的一个或者多个第三程序,以实现如上所述的PC5载频选择方法的步骤。
本申请实施例还提供一种V2X接收端设备,所述V2X接收端设备包括第三处理器、第三存储器及第三通信总线;
所述第三通信总线设置为实现第三处理器和第三存储器之间的连接通信;
所述第三处理器设置为执行第三存储器中存储的一个或者多个第三程序,以实现如上所述的PC5载频选择方法的步骤。
本申请实施例还提供一种计算机存储介质,所述计算机可读存储介质存储有一个或者多个第一程序,所述一个或者多个程序被一个或者多个处理器执行,以实现如上所述的PC5载频选择方法的步骤。
附图概述
图1为本申请实施例一的PC5载频选择方法流程示意图;
图2为本申请实施例一的结合载频选择控制信息进行PC5载频选择的流程示意图;
图3为本申请实施例二的PC5载频选择方法流程示意图;
图4为本申请实施例三的PC5载频选择装置结构示意图;
图5为本申请实施例三的V2X发送端设备结构示意图;
图6为本申请实施例三的另一PC5载频选择装置结构示意图;
图7为本申请实施例三的基站结构示意图;
图8为本申请实施例三的RRC空闲态的mode 4 UE的发送载频选择方法流 程示意图;
图9为本申请实施例四的RRC连接态的mode 4 UE的发送载频选择方法流程示意图;
图10为本申请实施例五的RRC连接态的mode 3 UE的发送载频选择方法流程示意图;
图11为本申请实施例五的Vehicle UE之间的通信示意图一;
图12为本申请实施例五的Vehicle UE之间的通信示意图二;
图13为本申请实施例五的Vehicle UE之间的通信示意图三;
图14为本申请实施例六的PC5载频选择方法流程示意图;
图15为本申请实施例六的PC5载频选择装置结构示意图;
图16为本申请实施例六的V2X接收端设备结构示意图;
图17为本申请实施例六的PC5接收载频选择方法流程示意图。
下面通过具体实施方式结合附图对本申请实施例作进一步详细说明。应当理解,此处所描述的具体实施例仅仅用以解释本申请,并不用于限定本申请。
实施例一:
在V2X车联网通信模式下,V2X消息的传输可以组播的方式和广播的方式进行传输。组播的一种方实现方式则是基于MBSFN(Multicast Broadcast Single Frequency Network)以及SC-PTM(Single-cell point-to multiple point)的广播机制支持通过Uu口进行V2X消息的广播传输。广播的一种实现方式是基于UE到UE的直接发现/通信(D2D,sidelink,ProSe)支持通过PC5接口(在3GPP Rel-12中引入的一个UE与UE之间进行直接交互的接口,称为PC5接口)进行V2X消息的广播传输。传统的以基站为中心的蜂窝网络在高数据速率以及邻近服务的支持方面存在明显的局限性,不能满足搞数据速率和临近服务的需求。D2D技术的应用,可以减轻蜂窝网络的负担、减少用户设备的电池功耗、提高数据速率,并改善网络基础设施的鲁棒性,很好地满足上述高数据速率业务和邻近服务的要求,因此V2X通信也可使用D2D以满足高数据速率业务和邻近服务的要求。目前D2D技术又称之为邻近服务(Proximity Services,ProSe)、单边链路(SideLink,SL)。
同样,在V2X通信中,数据高可靠性和高速率传输中的至少之一也是一种 广大的需求和发展趋势,而要实现V2X业务数据高可靠性和高速率传输中的至少之一,就需要将V2X业务数据采用多个载频进行传输,此时对于载频选择的准确性就要求更高,且需要改善如何选择出需要使用的多个载频的现象。本实施例针对该问题提供了一种PC5载频选择方法,本实施例中的PC5载频是指通过PC5接口传输时所使用的载频,其中该PC5载频选择方法参见图1所示,包括:步骤S101和步骤S102。
在步骤S101中,V2X发送端设备根据V2X业务数据的业务标识和业务标识与载频映射关系得到所述V2X业务数据的初始候选载频集合。
应当理解的是,本实施例中的V2X发送端设备可以是车载终端设备,也可以是用户终端设备。具体可以根据具体的车联网通信的模式确定。且本实施例中的V2X发送端设备也同时作为V2X业务数据接收方。
在本实施例中,业务标识与载频映射关系可通过业务标识和V2X载频映射关系表进行表征。本实施例中的业务标识与载频映射关系也可通过预配置的方式配置在V2X发送端设备上;当然也可以通过其他方式设置在V2X发送端设备上。
在本实施例中,获取到业务标识后,将该业务标识带到业务标识与V2X载频映射关系表中进行查询,就能查到该业务标识对应的载频,该业务标识所对应的所有载频则组成初始候选载频集合。且业务标识具体可由V2X发送端设备的高层传递到V2X发送端设备的底层。
在步骤S102中,V2X发送端设备根据载频选择信息从初始候选载频集合中选择V2X业务数据的传输载频。根据载频选择信息从初始候选载频集合中进一步选择传输载频可以提升载频选择的准确性。
本实施例中,V2X发送端设备根据载频选择信息从所述初始候选载频集合中选择所述V2X业务数据的传输载频包括V2X发送端设备利用载频选择信息对初始候选载频集合中不符合条件的载频删除得到有效候选载频集合的过程。
在本实施例中,V2X发送端设备采用的具体载频选择信息、以及具体选择方式可以根据V2X发送端设备当前的连接状态以及当前采用的资源分配模式灵活选择。
例如,在V2X通信中,支持两种资源分配模式:1)基于调度的资源分配(Scheduled resource allocation,mode 3),这种模式下UE需进入RRC连接状态向基站请求用于传输的资源,UE通过向基站发送sidelink UE information消息来 请求资源。当然在本实施例中也可通过向基站发送其他消息来请求资源,并不限于sidelink UE information消息。2)UE自主资源选择(UE autonomous resource selection,mode 4),这种模式下UE基于监听sensing从资源池中自主选择资源以进行SCI(Sidelink Control Information)和数据传输;这种方式可用于RRC空闲状态或者RRC连接状态的UE。
因此,在本实施例中,当V2X发送端设备处于RRC空闲状态下时,V2X发送端设备可以采用mode 4模式,其可采用自身的以及从基站或其他地方获取的可用于载频选择的信息进行载频的选择,本实施例中可将从基站获取的用于实现载频选择的相关信息称为载频选择控制信息,且此时V2X发送端设备可通过系统消息从基站获取相关的载频选择控制信息。当然,应当理解的是载频选择控制信息并不限于从基站获取,不排除通过预配置或从物理层获取等方式进行获取。
当V2X发送端设备处于RRC连接状态下时,V2X发送端设备可以采用灵活的在mode 3模式和mode 4模式之间选择,此时,V2X发送端设备可以将相关可用于载频选择的信息发给基站,由基站进行载频的选择,本实施例中可将V2X发送端设备发给基站的用于实现载频选择的相关信息称为载频选择辅助信息。当然,在该场景下,也可由V2X发送端设备和基站结合实现载频的选择,例如V2X发送端设备(可结合载频选择控制信息,也可能不结合载频选择控制信息)完成一些步骤的载频选择,基站完成另一些步骤的载频选择(可结合载频选择辅助信息,也可能不结合载频选择辅助信息)。在该场景下,V2X发送端设备还可采用类似处于RRC空闲状态下时从基站获取载频选择控制信息实现载频的选择,此时V2X发送端设备可通过RRC专有信令从基站获取载频选择控制信息,当然根据需求也可通过其他消息(例如系统消息)从基站获取载频选择控制信息。
在本实施例中,V2X发送端设备可从得到的有效候选载频集合中选择至少两个载频作为该V2X业务数据的传输载频。在本步骤中,V2X发送端设备从得到的有效候选载频集合中选择至少两个载频作为该V2X业务数据的传输载频之前,可先判断V2X业务数据是否需要采用多载频传输。
根据上述分析可知,本实施例中,用于传输的载频的个数可能是由V2X发送端设备确定,也可能是由基站确定,然后由V2X发送端设备选择相应数量的用于传输的载频。
且应当理解的是,采用多个载频对V2X业务数据进行传输时,可以是基于高数据速率的需求,也可以基于高可靠性的需求。当基于高数据速率的需求时,则可以采用多载频数据分流(data split)传输,当基于高可靠性的需求时,可以采用多载频数据重复(data duplication)传输,当然两种传输方式也可根据实际需求结合使用。当采用多载频数据分流(data split)传输时,在确定好V2X业务数据的至少两个传输载频后,还可包括确定各个传输载频上所传输数据的比例,且可由V2X发送端设备自主确定,也可由基站确定,或V2X发送端设备联合基站一起确定。
例如,一种示例中,V2X发送端设备利用的载频选择信息包括同步参考定时信息、载频上V2X资源池的信道繁忙比率CBR门限值(可从基站获取,也可从其他地方获取)、V2X发送端设备PC5多载频发送能力信息和基站发送给UE的V2X传输载频集合(即基站发送的可用于传输的载频列表)中的至少一种。
此时,V2X发送端设备利用载频选择信息对所述初始候选载频集合中不符合条件的载频删除可包括但不限于以下中的至少一种:利用同步参考定时信息将所述初始候选载频集合中的非同步定时对齐的载频删除;将初始候选载频集合中,载频上V2X资源池的信道繁忙比率CBR测量值大于该载频上V2X资源池的信道繁忙比率CBR门限值的载频删除;根据PC5多载频发送能力信息从所述初始候选载频集合中选出V2X发送端设备能力范围内的最大数量的载频,并将所述初始候选载频集合中多余的其他载频删除;获取初始候选载频集合与所述基站发送给UE的V2X传输载频集合的载频交集,将所述初始候选载频集合中所述载频交集之外的载频删除。
本申请的有益效果是:
根据本申请实施例提供的PC5载频选择方法以及装置、设备和基站及存储介质,V2X发送方需要使用载频发送V2X业务数据时,V2X发送端设备可根据V2X业务数据的业务标识和业务标识与载频映射关系得到所述V2X业务数据的初始候选载频集合,并利用载频选择信息进一步从初始候选载频集合中选择出符合条件的载频作为V2X业务数据的传输载频以对V2X业务数据进行传送,可实现载频更为准确的选择和匹配;对于接收方接收能力受限时,V2X接收端设备可按照各个V2X业务数据的目标业务标识对应的优先级从高到低的顺序,选择在自身PC5多载频接收能力信息支持的范围内能同时接收的M个载频作为接 收载频,从而可保证用户感兴趣的高优先级的V2X的接收,提升用户体验的满意度。
应当理解的是,上述步骤可以灵活组合,且多个步骤之间的时序关系也可以灵活设定,为了便于理解本申请,本实施例下面分别以V2X发送端设备结合从基站获取的载频选择控制信息进行载频选择示例,结合上述多个步骤的一种组合应用示例,对本申请做进一步的说明。
V2X发送端设备结合从基站获取的载频选择控制信息进行载频选择时,相关的载频选择控制信息可以是V2X发送端设备提取从基站获取到的,也可以是在V2X发送端设备需要时从基站实时获取的。此时的PC5载频选择方法参见图2所示,包括:步骤S201至步骤S206。
在步骤S201中,V2X发送端设备根据V2X业务数据的业务标识和业务标识与载频映射关系得到V2X业务数据的初始候选载频集合。
该步骤中的V2X业务数据可以是V2X发送端设备高层产生的待发送的数据,也可以是其他来源的待发送数据,且该V2X业务数据可以是一个,也可以是多个。如果是多个,则可对于每一个V2X业务消息,都根据对应的业务标识和业务标识与载频映射关系到该V2X业务消息的初始候选载频集合。
在步骤S202中,V2X发送端设备取初始候选载频集合与基站发送给UE的V2X传输载频集合的载频交集作为有效候选载频集合。
此时,载频选择信息包括基站发送给UE的V2X传输载频集合,且该基站发送给UE的V2X传输载频集合可以是V2X发送端设备从基站提前或实时获取的,也可以是从其他地方获取的。通过本步骤的操作可以将初始候选载频集合中不是基站支持的V2X传输载频剔除。
在本步骤中,V2X发送端设备可能处于基站覆盖状态,也可能处于无覆盖状态。当V2X发送端设备处于无覆盖状态时,初始候选载频集合与基站发送给UE的V2X传输载频集合的载频交集为空,并且UE在预配置的V2X载频上没有检测到合适的小区,此时载频选择信息还包括用于无覆盖下的V2X传输载频集合;且该无覆盖下的V2X传输载频集合可以通过预置的方式设置于V2X发送端设备上。此时V2X发送端设备利用载频选择信息从初始候选载频集合中选择出符合条件的载频组成有效候选载频集合就包括:
V2X发送端设备在自身处于无覆盖状态时,取初始候选载频集合与无覆盖下的V2X传输载频集合的载频交集作为有效候选载频集合,以进行后续载频选 择。
另外,在本实施例中,在执行上述S202之前,V2X发送端设备将V2X业务数据映射到对应的PC5逻辑信道上,在映射过程中,如果该V2X业务数据没有对应的逻辑信道,则为其新建立一个逻辑信道。UE根据V2X数据的可靠性等级/需求判断是否使用多载波data duplication方式传输。若需采用多载波data duplication方式传输,则UE建立多个逻辑信道用于传输该数据包。UE可将根据该V2X业务数据的业务标识和业务标识与载频映射关系得到初始候选载频集作为该PC5逻辑信道的初始候选载频集合。后面则可以逻辑信道为单位进行候选载频集合的管理。但应当理解的是,该逻辑信道映射步骤为可选步骤。且本实施例中具体的映射规则可以灵活设定。
在本实施例中,通过上述取交集对载频进行进一步选择后,还可通过以下筛选方式中的至少一种对有效候选载频集合中的载频进行进一步筛选选择。且应当理解的是,以下载频筛选过程的执行都是可选的,且执行顺序并无严格的时序限制,多个步骤的执行顺序可互换,且在一些示例中甚至可并行执行。
在步骤S203中,通过有效候选载频集合中各载频上V2X资源池的信道繁忙比率CBR测量值和对应的CBR测量值门限值进行筛选,得到筛选后的有效候选载频集合。
此时载频选择控制信息包括载频上V2X资源池的信道繁忙比率CBR门限值。本实施例中,载频上的V2X资源池可以从基站获得,也可以通过在设备上预配置获得。CBR门限值也可以从基站获得,或通过在设备上预配置获得。且CBR门限值可以是一个,也可以为多个,为多个时可以根据不同的业务类型、服务质量QoS信息、载频或资源池设置对应的不同CBR门限值。在进行筛选时则根据当前V2X业务数据对应的业务类型、服务质量QoS信息、载频或资源池先选择出对应的CBR门限值,然后再利用该门限值和对应的CBR测量值进行载频的进一步筛选。本实施例中的服务质量QoS信息包括但不限于数据包优先级PPPP、数据速率data rate、数据可靠性reliability、数据包时延预算packet delay budget中的至少一种。例如,一种示例中,从基站获取的CBR门限值包括但不限于以下示例中的至少一种:
1)CBR门限值;
2)CBR门限值及对应的优先级;
3)CBR门限值及对应的data rate;
4)CBR门限值及对应的reliablility;
5)CBR门限值及对应的packet delay budget。
本步骤中的筛选过程包括:
V2X发送端设备获取有效候选载频集合中各载频上V2X资源池的信道繁忙比率CBR测量值;
将有效候选载频集合中,载频上V2X资源池的信道繁忙比率CBR测量值大于该载频上V2X资源池的信道繁忙比率CBR门限值的载频删除,也即认为这部分载频不能用于传输,将其从集合中剔除;剩余的则认为可用于传输。
在本实施例中,将有效候选载频集合中,载频上V2X资源池的信道繁忙比率CBR测量值大于该载频上V2X资源池的信道繁忙比率CBR门限值的载频删除后,还可包括以下可选步骤:将有效候选载频集合中剩余的载频按照各载频上V2X资源池的信道繁忙比率CBR测量值从小到大的顺序依次排列。当然,一种等同的做法也可以采用从大到小的顺序进行排列,此时选择载频时则可以从后到前的顺序进行选择。
在本实施例中,执行上述S203之前,或之后,V2X发送端设备还可利用同步参考定时信息从有效候选载频集合中筛选出同步定时对齐的载频,并将有效候选载频集合中的其他载频删除。此时的载频选择信息则还包括同步参考定时信息。同步定时信息包括以下信息之一或组合:同步参考类型,包括:UE,GNSS,基站;同步源所处覆盖状况,用于指示同步源在覆盖内还是覆盖外;同步源绝对定时值。一种示例中,同步参考类型为UE的物理层所选择的同步参考类型。
在步骤S204中,V2X发送端设备根据自身的PC5多载频发送能力信息从有效候选载频集合中选出自身能力范围内的最大数量的载频,并将该有效候选载频集合中多余的其他载频删除。
此时,载频选择信息就还包括所述V2X发送端设备PC5多载频发送能力信息。本实施例中,PC5多载频发送能力信息包括支持同时进行PC5发送的频带组合信息(可包括支持同时进行PC5传输的最大载频数量以及哪些载频可用于同时进行PC5传输),同时支持PC5和Uu发送的频带组合信息(可包括支持同时进行PC5和Uu传输的最大载频数量以及哪些载频可用于同时进行PC5和Uu传输)以及发送链路Tx chain信息中的至少一种。
V2X发送端设备可根据自身当前的工作状态(是同时采用PC5和Uu传输,还是仅采用PC5传输)和发送链路Tx chain数量中的至少之一确定出自身的能 力范围,例如确定自身当前最多支持3个载频同时进行PC5传输或PC5和Uu传输;然后从有效候选载频集合中选出自身能力范围内的最大数量(例如3个)的载频,并将其他载频删除。当PC5多载频发送能力信息指定了具体采用哪些载频时,从有效候选载频集合中选出自身能力范围内的最大数量的载频时,还需选择指定的这些载频。应当理解的是,本实施例中最终选择到的载频个数是小于等于V2X发送端设备自身能力范围内的最大数量的。
在步骤S205中,V2X发送端设备判断V2X业务数据是否采用多载频传输。
应当理解的是,本实施例中判断V2X业务数据是否采用多载频传输可以在前面步骤的任一步骤中或之前执行,例如可以在步骤S202中执行,或者在其他步骤中或之前执行。
在本实施例中,V2X发送端设备判断V2X业务数据是否采用多载频传输可以采用以下判断方式中的任意一种:
方式一:V2X发送端设备根据V2X业务数据的传输参数与对应的传输参数门限值判断V2X业务数据是否采用多载频传输。
方式二:V2X发送端设备根据所述V2X业务数据的传输参数与对应的载频数量映射关系判断V2X业务数据是否采用多载频传输。
传输参数包括缓冲区数据量buffer size和服务质量QoS信息中的至少一种,本实施例中的服务质量QoS信息包括但不限于数据包优先级PPPP、数据速率data rate、数据可靠性reliability、数据包时延预算packet delay budget中的至少一种。且应当理解的是,本实施例中的各传输参数可以灵活选用和组合。
例如,采用上述方式一判断时,采用的传输参数门限值包括但不限于以下门限值中的至少一种:
1)数据包优先级PPPP门限值,例如,若数据包的PPPP值大于优先级门限值,则不使用PC5多载频(CA)功能;若数据包的PPPP值小于优先级门限值,则可使用PC5CA功能,包括data split和data duplication中的至少一种;
2)buffer size门限值;
3)data rate门限值;
4)delay budget门限值;
5)reliability门限值;
6)reliability和delay budget门限值;
7)buffer size和delay budget门限值。
对应的,采用方式一时,可以采用上述示例的任意一种或几种门限值,对应的邻近服务数据包优先级PPPP值、buffer size值、data rate值、packet delay budget值、reliability值(具体可通过可靠性级别信息进行表征)中的一种或几种与对应的门限值比对即可。
本实施例中的上述门限值可从基站获取,且具体可通过系统消息或RRC专用指令获取。当然也可通过其他途径获取,例如通过预配置等方式实现。且应当理解的是上述示几种门限值仅仅是一种示例,根据实际需求可以灵活扩展或组合。
采用上述方式二判断时,传输参数与对应的载频数量映射关系包括但不限于以下示例中的至少一种:
1)buffer size范围与对应的载频数量;
2)data rate范围与对应的载频数量;
3)reliability范围与对应的载频数量;
4)packet delay budget范围和buffer size范围与对应的载频数量;
5)优先级与对应的载频数量,具体可为PPPP值或PPPP值范围对应的载频个数。
对应的,采用方式二时,可以采用上述示例的任意一种或几种映射关系,对应的数据包优先级PPPP值、buffer size值、data rate值、packet delay budget值、reliability值中的一种或几种,并带入与对应映射关系即可匹配出对应的载频数量,根据匹配出的载频数量确定是否需要采用多载频传输,例如当匹配出的载频数量为1,则表明不需要采用多载频传输,当匹配出来的载频数量为大于等于2的整数值,则表明需要采用多载频传输。
本实施例中的上述映射关系也可从基站获取,且具体可通过系统消息或RRC专用指令获取。当然也可通过其他途径获取,例如通过预配置等方式实现。且应当理解的是上述示几种映射关系也仅仅是一种示例,根据实际需求可以灵活扩展或组合。
在步骤S206中,上述S205确定需要采用多载频传输时,从上述有效候选载频集合中选择至少两个载频作为V2X业务数据的传输载频;该选择过程包括:
如果S205是采用上述方式二判断时,则可在判断是否采用多载频传输的同时获取到需采用的载频数量。当不是采用上述方式二判断时,则可根据V2X发送端设备的传输参数与对应的载频数量映射关系确定V2X业务数据传输需采用 的载频数量,具体确定过程参见上述S205中的方式二所示;然后根据确定的载频数量从有效候选载频集合中选择对应个数的载频作为V2X业务数据的传输载频。在一个示例中,选择载频时,可以按照有效候选载频集合中各载频的CBR测量值从小到大的顺序进行选择。
在一实施例中,各载频资源池的CBR测量结果变化导致有效候选载频集合中的载频顺序发生变更后,可立即根据更新的载频列表进行后续载频选择,或者可在预设时间段后再根据更新的有效候选载频集合进行后续载频选择。当可用频点集合发生变更,如新增和删除中的至少之一,则可立即根据更新的有效候选载频集合(即可用频点集合及载频顺序)进行后续载频选择。
在实施例中,从上述有效候选载频集合中选择至少两个载频作为V2X业务数据的传输载频还可采用以下方式:
先在有效候选载频集合中选择一个载频对所述V2X业务数据进行传输,可以按照有效候选载频集合中各载频的CBR测量值从小到大的顺序进行选择;
根据监听sensing结果判定选择的载频是否满足V2X业务数据的传输需求(具体判断方式可以灵活选择),如否,从有效候选载频集合再选一个载频对所述V2X业务数据进行传输,然后再根据监听sensing结果判定选择的载频是否满足V2X业务数据的传输需求,重复上述过程,直到选择的载频个数满足V2X业务数据的传输需求。
在本实施例中,当基于高数据速率的需求采用多个载频对V2X业务数据进行传输时,在确定好V2X业务数据的至少两个传输载频后,还可包括确定各传输载频上所传输数据的比例。当V2X发送端设备处于RRC闲置或RRC连接状态时,可由V2X发送端设备自主确定各传输载频上所传输数据的比例;当V2X发送端设备处于RRC连接状态时,即可由V2X发送端设备自主确定,也可由基站确定。例如,确定时可以根据各载频上资源池的CBR测量值得大小,需要传输的数据包大小等因素设定;对于CBR测量值较小的载频上的资源上可以传输较多的数据,在CBR测量值较大的载频上的资源上可以传输相对较少的数据。由V2X发送端设备自主确定时,V2X发送端设备也可结合上述参数进行确定,还可结合具体需要传输的数据的类型等因素进行确定。
如上分析所示,当V2X发送端设备处于RRC连接状态时,V2X发送端设备在利用载频选择信息从初始候选载频集合中选择出符合条件的载频之前,还可向基站发送相应的载频选择辅助信息以便于基站进行载频选择的相关处理, 本实施例中向基站发送的载频选择辅助信息包括但不限于:
逻辑信道标识;逻辑信道组标识;目标标识或目标索引号;QoS信息;载频数量;多载频指示信息;其中多载频指示信息用于指示是否使用多载频传输,或者是否使用多载频data split传输,或者是否使用多载频data duplication传输,或者是否使用多载频data split和data duplication传输;V2X载频;
同步定时信息;
其中,同步定时信息包括以下之一或组合:
同步参考类型,包括:UE,GNSS,基站;
同步源所处覆盖状况,用于指示同步源在覆盖内还是覆盖外;
同步源绝对定时值。
其中,上述逻辑信道ID、逻辑信道组标识、目标标识或目标索引号都是上述V2X业务数据所对应的。
以上示例为V2X发送端设备结合从基站获取的载频选择控制信息进行载频选择的示例进行了说明。通过上述载频选择方式,当V2X发送方需要采用多个载频发送V2X业务数据时,V2X发送端设备可根据V2X业务数据的业务标识和业务标识与载频映射关系得到所述V2X业务数据的初始候选载频集合,并利用载频选择信息从初始候选载频集合中选择出符合条件的载频组成有效候选载频集合,然后从得到的有效候选载频集合中选择至少两个载频作为V2X业务数据的传输载频以对V2X业务数据进行传送,可实现多载频的可靠、有效选择和匹配。
实施例二:
为了更好的理解本申请,下面以基站结合V2X发送端设备发送的载频选择辅助信息进行载频选择为示例进行说明。此时,V2X发送端设备处于RRC连接状态,且其可采用mode 3模式或mode 4模式,此时载频选择辅助信息包括V2X业务数据对应的传输参数,该传输参数包括缓冲区数据量buffer size和服务质量QoS信息中的至少一种。本实施例中,V2X业务数据对应的服务质量QoS信息可以采用逻辑信道标识及对应的QoS信息,或者目标标识及对应的QoS信息,或者逻辑信道组标识及对应的QoS信息进行表征。
在一实施例中,若同一个目标ID的V2X数据包含多种QoS需求,则PC5信令中仅包含多种QoS需求中最高QoS需求信息;若同一个逻辑信道组可用于传输多种QoS需求的数据,则该PC5信令中仅包含多种QoS需求中最高的QoS 需求信息。
此时,V2X发送端设备利用载频选择信息从初始候选载频集合中选择出符合条件的载频组成有效候选载频集合包括:
发送RRC消息(例如包括但不限于sidelink UE information消息)给基站,RRC消息包括载频选择辅助信息,载频选择辅助信息包括初始候选载频集合;
根据从基站接受到的RRC连接重配置消息得到有效候选载频集合。
对应的,参见图3所示,基站侧则执行以下步骤S301和步骤S302。
在步骤S301中,接收V2X发送端设备发送的载频选择辅助信息,所述载频选择辅助信息包括根据V2X业务数据的业务标识和业务标识与载频映射关系得到所述V2X业务数据的初始候选载频集合。
基站具体可接收V2X发送端设备发送的RRC消息,RRC消息包括载频选择辅助信息,载频选择辅助信息包括根据V2X业务数据的业务标识和业务标识与载频映射关系得到V2X业务数据的初始候选载频集合;
在步骤S302中,向V2X发送端设备发送载频选择控制信息。
具体可向V2X发送端设备发送RRC连接重配置消息,RRC连接重配置消息包括将初始候选载频集合中不符合条件的载频删除后得到的有效候选载频集合。
在本实施例中,基站接收到的载频选择辅助信息可以包括同步参考定时信息、V2X发送端设备的PC5多载频发送能力信息中的至少一种,基站发送给V2X发送端设备的RRC连接重配置消息包括有效候选载频集合,该有效候选载频集合为基站对初始候选载频集合进行以下至少一种处理后得到的:
利用同步参考定时信息将初始候选载频集合中的非同步定时对齐的载频删除;
将初始候选载频集合中,载频上V2X资源池的信道繁忙比率CBR测量值大于该载频上V2X资源池的信道繁忙比率CBR门限值的载频删除;
根据PC5多载频发送能力信息从初始候选载频集合中选出V2X发送端设备能力范围内的最大数量的载频,并将初始候选载频集合中多余的其他载频删除;
获取初始候选载频集合与下发给UE的V2X传输载频集合的载频交集,将初始候选载频集合中载频交集之外的载频删除。
参见上述实施例一的分析,上述步骤也可以灵活组合,且时序也可灵活变化。
在一种示例中,V2X发送端设备发给基站的载频选择辅助信息还包括V2X业务数据对应的传输参数;传输参数包括缓冲区数据量buffer size和服务质量QoS信息中的至少一种,服务质量QoS信息包括邻近服务数据包优先级PPPP、数据速率data rate、数据可靠性reliability、数据包时延预算packet delay budget中的至少一种;
基站还可根据上述参数生成多载频传输指示信息、载频数量配置信息等载频选择控制信息中的至少一种,且生成方式可参见上述V2X发送端设备基于这些参数进行判断的方式。此时基站下发的RRC连接重配置消息包括载频配置信息,载频配置信息包括多载频传输指示信息、载频数量配置信息等载频选择控制信息的至少一种,在一中示例中还可包括载频数据分流比例配置信息。
在本实施例中,V2X发送端设备从基站接收到的RRC连接重配置消息还可包括资源分配模式指示信息,资源分配模式指示信息指示V2X发送端设备采用mode3模式还是mode4模式。
在本实施例中,基站反馈的载频配置信息包括多载频传输指示信息时,V2X发送端设备判断V2X业务数据是否采用多载频传输可包括:V2X发送端设备判断RRC连接重配置消息中包含多载频传输指示信息时,判断V2X业务数据是否采用多载频传输。
基站反馈的载频配置信息包括载频数量配置信息时,从有效候选载频集合中选择至少两个载频作为V2X业务数据的传输载频包括:V2X发送端设备从RRC连接重配置消息中获取载频数量配置信息;
V2X发送端设备根据载频数量配置信息从有效候选载频集合中选择对应个数的载频作为V2X业务数据的传输载频。在一个示例中,V2X发送端设备根据有效候选载频集合中各载频的CBR测量值由小到大的顺序选择。
基站反馈的载频配置信息包括载频数据分流比例配置信息时,V2X发送端设备从有效候选载频集合中选择至少两个载频作为所述V2X业务数据的传输载频后,还包括:根据载频数据分流比例配置信息确定选择的各载频需传输的数据量大小。
可见,在本实施例中,V2X发送端设备向基站发送的载频选择辅助信息包括以下信息至少一种:
逻辑信道标识;逻辑信道组标识;目标标识或目标索引号;QoS信息;载频数量;多载频指示信息;其中多载频指示信息用于指示是否使用多载频传输, 或者是否使用多载频data split传输,或者是否使用多载频data duplication传输,或者是否使用多载频data split和data duplication传输;V2X载频(例如上述初始候选载频集合);
同步定时信息;
其中,同步定时信息包括以下之一或组合:
同步参考类型,包括:UE,GNSS,基站;
同步源所处覆盖状况,用于指示同步源在覆盖内还是覆盖外;
同步源绝对定时值。
基站向V2X发送端设备发送的载频选择控制信息包括以下信息中的至少一种:
基站可通过系统消息或RRC专有信令向UE发送载频选择控制信息,载频选择控制信息包括以下之一或组合:
1.载频列表:
1)根据CBR结果筛选后的有效候选载频集合(也可称可用载频列表);
2)根据CBR结果排序的有效候选载频集合;
2.载频数量(需使用的载频数量或可使用的最大载频数量);
3.逻辑信道标识;
4.逻辑信道组标识;
5.目标标识或目标索引号;
6.多载频指示信息,用于指示是否使用多载频传输;
7.载频的数据分流比例;
8.资源池信息;
9.用于确定是否使用PC5多载频传输:
1)优先级门限值,例如,若数据包的PPPP值大于优先级门限值,则不使用PC5CA功能;若数据包的PPPP值小于优先级门限值,则可使用PC5CA功能,包括data split,data duplication;
2)buffer size门限值;
3)data rate门限值;
4)delay budget门限值;
5)reliability门限值;
6)reliability和delay budget门限值;
7)buffer size和delay budget门限值;
10.用于确定是否使用PC5多载频和载频数量中的至少之一的信息:
1)buffer size范围与对应的载频数量;
2)data rate范围与对应的载频数量;
3)reliability范围与对应的载频数量;
4)packet delay budget范围和buffer size范围与对应的载频数量;
5)优先级与对应的载频数量,可为PPPP值/范围对应的载频个数;
11.用于确定载频是否可选择用于传输的信息:
1)CBR门限值;
2)CBR门限值及对应的优先级;
3)CBR门限值及对应的data rate;
4)CBR门限值及对应的reliablility;
5)CBR门限值及对应的packet delay budget。
本实施例还提供了一种V2X业务数据发送方法,参见图3所示,包括:
通过本实施例提供的方案,V2X发送方需要采用多个载频发送V2X业务数据时,V2X发送端设备可根据V2X业务数据的业务标识和业务标识与载频映射关系得到所述V2X业务数据的初始候选载频集合,并利用载频选择信息从初始候选载频集合中选择出符合条件的载频组成有效候选载频集合,然后从得到的有效候选载频集合中选择至少两个载频作为V2X业务数据的传输载频以对V2X业务数据进行传送,可实现多载频的可靠、有效选择和匹配。
实施例三:
本实施例提供了一种PC5载频选择装置,该PC5载频选择装置可设置于V2X发送端设备中,且其包括的各模块的功能可由V2X发送端设备的处理器实现。参见图4所示,PC5载频选择装置包括:初始选择模块401和载频确定模块402。
初始选择模块401,设置为根据V2X业务数据的业务标识和业务标识与载频映射关系得到所述V2X业务数据的初始候选载频集合。
载频确定模块402,设置为根据载频选择信息从所述初始候选载频集合中选择所述V2X业务数据的传输载频;具体选择方式参见上述实施例一种所示的选择方式,在此不再赘述。
本实施例还提了一种V2X发送端设备,该V2X发送端设备可能是车载终端, 也可能是用户终端,且该V2X发送端设备也同时作为接收设备。参见图5所示,本实施例中的V2X发送端设备包括第一处理器501、第一存储器502及第一通信总线503;
第一通信总线503设置为实现第一处理器501和第一存储器502之间的连接通信;
第一处理器501设置为执行第一存储器502中存储的一个或者多个第一程序,以实现如实施例一所述的PC5载频选择方法的步骤。
本实施例还提供了一种计算机存储介质,该计算机可读存储介质存储有一个或者多个第一程序,所述一个或者多个第一程序被一个或者多个处理器执行,以实现如实施例一所述的PC5载频选择方法。
实施例还提供可一种设置于基站上的PC5载频选择装置,参见图6所示,包括:
信息接收模块601,设置为接收V2X发送端设备发送的载频选择辅助信息,所述载频选择辅助信息包括根据V2X业务数据的业务标识和业务标识与载频映射关系得到所述V2X业务数据的初始候选载频集合。
配置处理模块602,设置为向所述V2X发送端设备发送载频选择控制信息;具体可向V2X发送端设备发送RRC连接重配置消息,该RRC连接重配置消息包括将初始候选载频集合中不符合条件的载频删除后得到的有效候选载频集合。配置处理模块602利用载频选择信息从初始候选载频集合中选择出符合条件的载频的方式参见上述实施例一种所示的选择方式,在此不再赘述。
本实施例还提了一种基站。参见图7所示,本实施例中的基站包括第二处理器701、第二存储器702及第二通信总线703;
第二通信总线703设置为实现第二处理器701和第二存储器702之间的连接通信;
第二处理器701设置为执行第二存储器702中存储的一个或者多个第二程序,以实现如实施例二所述的PC7载频选择方法的步骤。
本实施例还提供了一种计算机存储介质,该计算机可读存储介质存储有一个或者多个程序,所述一个或者多个程序被一个或者多个处理器执行,以实现如实施例一或实施例二所述的PC7载频选择方法的步骤。
为了便于理解本申请,本实施例以V2X发送端设备为UE为示例,以UE处于RRC空闲状态并采用mode 4进行说明。
RRC空闲态的mode 4 UE的发送载频选择方法参见图8所示,包括:
在步骤S801中,UE高层产生V2X消息(即V2X业务数据,也即V2X数据包)后,针对每个V2X消息,UE的高层根据该V2X消息的业务标识和业务标识与载频之间的映射关系得到候选载频集合1(即初始候选载频集合),并发送给AS层。
在一实施例中,每个V2X消息由UE高层传递到UE的AS(Access Stratum)层时可同时携带以下至少之一:其对应的业务标识,目标标识,优先级(PPPP),载频集合1(含一个或多个V2X载频点信息)。
在步骤S802中,每个V2X消息到达AS层时,UE的AS层根据V2X消息的业务相关信息将其映射到对应的PC5逻辑信道。
若该V2X消息没有对应的逻辑信道,则建立新的逻辑信道。业务相关信息为以下之一或组合:V2X业务标识,目标标识,PPPP优先级,reliability需求,data rate需求,packet delay budget。例如,业务标识为1且优先级为1的V2X消息映射到逻辑信道1,业务标识为1且优先级为2的V2X消息映射到逻辑信道2。
在该步骤中,若UE从基站接收PPPP与reliability需求之间的映射关系,或者UE通过预配置方式获得PPPP与reliability需求之间的映射关系,或者UE从V2X control function或V2X application server获得PPPP与reliability需求之间的映射关系,则UE可根据数据包的PPPP,PPPP与reliability需求之间的映射关系计算得到数据包的reliability需求。或者,UE可从高层获得V2X消息及其对应的reliability需求。在一实施例中,UE可根据数据包的reliability需求判断是否使用多载频data duplication方式传输。UE可根据预配置的,或从V2X control function或V2X application server获得的,或从基站获得的reliability门限值,将获取的reliability需求与该reliability门限值进行比较;或从基站获取reliability需求范围与载频数量之间的映射关系,将获取的reliability需求与reliability需求范围与载频数量之间的映射关系进行匹配;从而判断是否使用多载频data duplication方式传输。在一实施例中,若需采用多载频data duplication方式传输,则UE建立多个逻辑信道用于传输该数据包。此处判断需要采用多载频进行传输时,后面可不再进行是否需要进行多载频传输。此处不执行该判断过程时,后面则可进行多载频传输判断。
在步骤S803中,UE为每个PC5逻辑信道(或者每个V2X数据包)确定其对应的候选载频集合。
例如,根据从高层获得的V2X消息对应的载频集合确定其对应的候选载频集合1。在一实施例中,AS层根据基站支持的V2X载频集合得到与候选载频集合1的交集,将该交集作为候选载频集合2。在一实施例中,如果基站所支持的V2X载频集合与候选载频集合1没有交集,并且UE内预配置的V2X载频上没有检测到合适的小区,则UE认为资深处于无覆盖状态,根据候选载频集合1和预配置的用于无覆盖下的V2X载频之间的交集得到候选载频集合2进行后续载频选择。
在步骤S804中,UE根据资源池所在载频上的同步参考定时情况,从候选载频集合2中筛选出同步定时对齐的多个载频,并将候选载频集合2中其他的载频删除。,形成候选载频集合3。同步参考定时情况包括以下信息之一或组合:同步参考类型,同步源所处覆盖状况(覆盖内或覆盖外);同步源绝对定时值。其中同步参考类型为UE的物理层所选择的同步参考类型。该步骤也可不执行。
在步骤S805中,UE对候选载频集合2或候选载频集合3内V2X载频的资源池执行CBR测量(不执行S804步骤时),或者,UE对候选载频集合2内同步定时对齐的多个载频内V2X资源池执行CBR测量。
在一实施例中,UE可通过系统消息从基站获得候选载频上的V2X资源池信息,或者通过预配置的方式获得候选载频上的资源池信息。UE可通过系统消息从基站获得用于判断V2X资源池所在载频是否可用于PC5传输的一个或多个CBR门限值,或者UE可通过预配置的方式获得用于判断V2X资源池所在载频是否可用于传输的一个或多个CBR门限值。在一实施例中,UE获得的配置信息还可以是多个CBR门限值分别与不同QoS参数或V2X业务类型或载频或资源池对应。在一实施例中,QoS参数可以为以下之一或组合:优先级,data rate,reliability,packet delay budget。例如,UE根据逻辑信道对应的业务类型或QoS参数确定该逻辑信道对应的CBR门限值,用于判断V2X载频是否可用于该逻辑信道数据的传输。在一实施例中,UE根据各载频上V2X资源池的CBR测量结果判断该测量的资源池所在载频是否可用于传输,例如,若该资源池的CBR测量结果高于对应的CBR门限值,则UE认为该载频不可用于传输;若该资源池的CBR测量结果低于对应的CBR门限值,则UE认为该载频可用于传输。UE根据上述对候选载频集合2或候选载频集合3内V2X载频的资源池的CBR测量过程筛选出候选载频集合4,即将不可用于传输的载频排除。在一实施例中,UE将候选载频集合4中频点根据各频点的CBR测量值进行排序,例如,将载 频按照CBR测量值由小到大排序,则CBR测量值最小的频点排在第一位,依此类推。
在步骤S806中,UE根据自身PC5CA能力信息从候选载频集合4中选出UE能力范围内可以同时进行传输的载频形成候选载频集合5。
在一实施例中,UE根据自身PC5CA发送能力信息从候选载频集合4中选出UE能力范围内可以同时进行PC5传输的最多数量的载频形成候选载频集合5。在一实施例中,UE的PC5CA发送能力信息包括以下之一或组合:1)同时进行PC5传输的频带组合band combination信息;2)同时进行PC5/Uu传输的频带band combination信息;3)发送链路Txchain数量。
在步骤S807中,UE的AS层确定是否需要采用多载频传输,并在需要时确定用于传输的载频数量并从候选载频集合5中选择用于传输的载频集合。
本示例中,UE的AS层可根据以下信息之一或组合确定是否需要采用多载频以data split和data duplication方式中的至少之一进行PC5数据传输。若需要,则进一步确定需用于传输的载频数量并从候选载频集合5中选择用于传输的载频集合:
1)数据包的reliability需求,高层向AS层传递数据包时可同时携带数据包的reliability需求信息。或者,UE可从基站获得PPPP与reliability需求的映射关系,或通过预配置获得PPPP与reliability需求的映射关系,并根据数据包的PPPP值映射得到reliability需求。或者,可定义新的PC5 QoS参数,高层向AS层传递数据包时可同时携带数据包的QoS参数,UE可根据该新定义的QoS参数推导出该数据包的reliability需求;
2)reliability门限值,
3)reliability范围与对应的载频数量;
4)数据包的packet delay budget;高层向AS层传递数据包时可同时携带数据包的packet delay budget需求信息。或者,UE可获得PPPP与packet delay budget需求的映射关系,并根据数据包的PPPP值映射得到packet delay budget需求。UE可从基站获得PPPP与packet delay budget需求的映射关系,或者通过预配置方式获得;
5)packet delay budget门限值;
6)packet delay budget范围与对应的载频数量;
7)数据包的优先级priority;高层向AS层传递数据包时可同时携带数据包 的优先级信息,优先级可以由PPPP值表示。
8)优先级门限值;
9)优先级与对应的载频数量;
10)数据包的data rate需求;高层向AS层传递数据包时可同时携带数据包的data rate需求信息。或者,UE可从基站获得PPPP与data rate需求的映射关系,或通过预配置获得PPPP与data rate需求的映射关系,并根据数据包的PPPP值映射得到data rate需求。或者,可定义新的PC5QoS参数,高层向AS层传递数据包时可同时携带数据包的QoS参数,UE可根据该新定义的QoS参数推导出该数据包的data rate需求;
11)data rate门限值;
12)data rate范围与对应的载频数量;
13)当前缓冲区数据量buffer size;
14)buffer size门限值;
15)buffer size范围与对应的载频数量;
16)packet delay budget范围和buffer size范围与对应的载频数量;
在一实施例中,UE可通过以下方法确定是否需要采用多载频以data split和data duplication方式中的至少之一进行PC5数据传输:
例如,若UE从基站接收到优先级门限值信息,则UE根据要传输数据的优先级与优先级门限值信息判断是否可使用多载频进行PC5数据传输。例如,若要传输数据的优先级取值(如,PPPP)小于所配置的优先级门限值,则可使用多载频进行PC5数据传输。
若UE从基站接收到Data rate门限值信息,则UE根据要传输数据的Data rate需求与Data rate门限值信息判断是否可使用多载频进行PC5数据传输。例如,若要传输数据的Data rate需求大于所配置的Data rate门限值,则可使用多载频进行PC5数据传输。
若UE从基站接收到Buffer size门限值信息,则UE根据当前逻辑信道的buffer size大小与Buffer size门限值信息判断是否可使用多载频进行PC5数据传输。例如,若当前逻辑信道的buffer size大于所配置的Buffer size门限值,则可使用多载频进行PC5数据传输。
若UE从基站接收到reliability门限值信息,则UE根据需传输数据的reliability需求与reliability门限值信息判断是否可使用多载频进行PC5数据传输。 例如,若需传输数据的reliability需求高于所配置的reliability门限值,则可使用多载频进行PC5数据传输。
若UE从基站接收到packet delay budget门限值信息,则UE根据需传输数据的packet delay budget与packet delay budget门限值信息判断是否可使用多载频进行PC5数据传输。例如,若需传输数据的packet delay budget小于所配置的packet delay budget门限值,则可使用多载频进行PC5数据传输。
本实施例中,确定用于传输的载频数量并从候选载频集合5中选择用于传输的载频集合可以参见以下几种示例。
示例1:根据packet delay budget和buffer size判断
UE可根据S806中根据CBR测量结果排序的载频列表,首先在候选载频集合5中选择排序第一的载频1,若根据sensing结果判断该载频上的资源池内可用资源可满足在delay budget内buffer中数据传输需求,则只使用该载频1进行数据传输;若不能满足,则继续添加排序第2的载频2用于传输,若根据sensing结果判断载频1和2上的资源池内可用资源可满足在delay budget内buffer中数据传输需求,则使用该载频1和载频2进行数据传输;若不能满足,则继续执行载频选择,添加排序第3的载频3,后续操作与上述类似。
示例2:根据配置的buffer size范围和packet delay budget与对应的载频数量判断
UE从基站获取buffer size范围和packet delay budget与载频数量的映射关系。UE根据当前buffer size大小和packet delay budget确定需使用的载频数量并在候选载频集合5中选择用于传输的载频。例如,基站可为UE配置buffer size 200-400字节,packet delay budget为50ms对应的载频数量为2,buffer size 200-400字节,packet delay budget为100ms对应的载频数量为1。该示例情况下,UE需在每次buffer size所处的范围发生变化之后重新确定需使用的载频数量,并在候选载频集合5中选择用于传输的载频。然后UE分别在所选择的用于传输的载频内V2X资源池执行资源选择过程,以选择用于传输的具体的时频域资源。
示例3:根据配置的buffer size范围与对应的载频数量判断
基站可为UE配置buffer size范围所对应的可使用的载频数量,或者UE可通过预配置方式获得。UE根据当前逻辑信道的buffer size大小与该映射关系确定该逻辑信道需使用的载频数量。例如,若配置为buffer size为0-200字节对应1个载频,buffer size为200-400字节对应2个载频,则若当前逻辑信道的buffer size为350字节,则UE确定需使用2个载频进行传输。该示例情况下,一旦逻辑信道的buffer size所处的范围发生变化之后重新确定需使用的载频数量,并在候选载频集合5中选择用于传输的载频。然后UE分别在所选择的用于传输的载频内V2X资源池执行资源选择过程,以选择用于传输的具体的时频域资源。
示例4:根据配置的data rate范围与对应的载频数量判断
基站可为UE配置data rate范围与载频数量之间的映射关系。UE根据需传输的V2X数据的data rate需求与该映射关系确定需使用的载频数量。UE在候选载频集合5中选择用于传输的载频。高层向AS层传递数据包时可同时携带数据包的data rate需求信息。或者,UE可从基站获得PPPP与data rate需求的映射关系,或通过预配置获得PPPP与data rate需求的映射关系,并根据数据包的PPPP值映射得到data rate需求。或者,可定义新的PC5QoS参数,高层向AS层传递数据包时可同时携带数据包的QoS参数,UE可根据该新定义的QoS参数推导出该数据包的data rate需求。该示例情况下,一旦逻辑信道的data rate需求所处的范围发生变化之后重新确定需使用的载频数量,并在候选载频集合5中选择用于传输的载频。然后UE分别在所选择的用于传输的载频内V2X资源池执行资源选择过程,以选择用于传输的具体的时频域资源。
示例5:根据配置的reliability范围与对应的载频数量判断
基站可为UE配置reliability范围与载频数量之间的映射关系。UE根据V2X业务的reliability需求与该映射关系确定需使用的载频数量。然后UE在候选载频集合5中选择用于传输的载频。高层向AS层传递数据包时可同时携带数据包的reliability需求信息。或者,UE可从基站获得PPPP与reliability需求的映射关系,或通过预配置获得PPPP与reliability需求的映射关系,并根据数据包的PPPP值映射得到reliability需求。或者,可定义新的PC5QoS参数,高层向AS层传递数据包时可同时携带数据包的QoS参数,UE可根据该新定义的QoS参数推导出该数据包的reliability需求。该示例情况下,一旦逻辑信道的reliability需求所处的范围发生变化之后重新确定需使用的载频数量,并在候选载频集合5中选择用于传输的载频。然后UE分别在所选择的用于传输的载频内V2X资源池执行资源选择过程,以选择用于传输的具体的时频域资源。
示例6:SPS数据采用数据分流方式下的载频选择
对于V2X业务SPS数据流,UE可以根据频点上资源池的CBR测量结果以及最高优先级的逻辑信道对应的PPPP确定某个频点的资源池上能选择的资源 RB个数/重传次数/MCS(Modulation and Coding Scheme),确定在单个载频上能传输的资源大小,然后根据数据包大小确定是否需要使用data split方式进行多载频数据传输,如果需要的话进一步确定需将数据包split到几个载频上。确定了split载频个数后,UE确定每个载频上的reservation interval以及HARQ(Hybrid Automatic Repeat reQuest)重传次数等,然后在各载频上执行资源选择并启动SPS传输;
或者,UE可以根据频点上资源池的CBR测量结果以及数据包的周期判断是否需要使用data split方式进行多载频数据传输,如果需要的话进一步确定需将数据包split到几个载频上。确定了split载频个数后,UE确定每个载频上的reservation interval以及HARQ重传次数等,然后在各载频上执行资源选择并启动SPS传输;
在一实施例中,每个载频使用独立的SL process,每个SL process对应独立的SL_RESOURCE_RESELECTION_COUNTER。
应当理解的是,上述图8所示的各步骤可自由组合并调整时间顺序。
实施例四:
为了便于理解本申请,本实施例以V2X发送端设备为UE为示例,以UE处于RRC连接状态并采用mode 4进行说明。
RRC连接态的mode 4 UE的发送载频选择方法参见图9所示,包括:步骤S901至步骤S906。
在步骤S901中,UE在符合条件(例如有V2X业务数据需要发送)时发送RRC消息给基站。
UE发送的RRC消息可以是sidelink UE information消息或UE assistance information消息,其中包含请求V2X sidelink传输资源的频点及对应的目标ID列表(v2x-DestinationInfoList,基站可通过目标ID推导出对应的V2X业务标识)。UE发送的RRC消息中包含的V2X载频为UE根据需传输数据的业务标识和业务标识与载频之间的映射关系得到候选载频集合1(即初始候选载频集合),或者,UE根据需传输数据的业务标识映射得到的候选载频集合1与基站支持的V2X载频集合(例如,包含服务载频及基站发送给UE的V2X异频频点)之间的交集,即候选载频集合2。在一实施例中,RRC消息中包含需请求资源的逻辑信道标识及对应的QoS信息,或者目标标识及对应的QoS信息,或者逻辑信道组标识及对应的QoS信息,也即包含需传输数据对应的QoS信息。在一实施 例中,若同一个目标ID的V2X数据包含多种QoS需求,则PC5信令中仅包含多种QoS需求中最高QoS需求信息;若同一个逻辑信道组可用于传输多种QoS需求的数据,则该PC5信令中仅包含多种QoS需求中最高的QoS需求信息。在一实施例中,QoS信息包含以下之一或组合:data rate需求,reliability需求,优先级,packet delay budget。其中reliability需求可以为可靠性级别信息。在一实施例中,该RRC消息中包含各载频的同步定时信息。
如上述实施例一的分析所示,UE向基站发送的载频选择辅助信息包括以下信息至少一种:
逻辑信道标识;
逻辑信道组标识;
目标标识;
QoS信息;
载频数量;
多载频指示信息;其中多载频指示信息用于指示是否使用多载频传输,或者是否使用多载频data split传输,或者是否使用多载频data duplication传输,或者是否使用多载频data split和data duplication传输;
V2X载频;
各载波的同步定时信息;包括以下之一或组合:同步参考类型(UE,GNSS,基站);同步源所处覆盖状况(用于指示同步源在覆盖内还是覆盖外);同步源绝对定时值;
在步骤S902中,eNB发送RRC Connection Reconfiguration(RRC连接重配置信息)给UE,其中包含资源分配模式指示信息(mode 4)和相应的配置信息。
基站可根据从UE接收的RRC消息中信息确定UE的资源分配模式生成相应的资源分配模式指示信息,并向UE发送相应的配置信息。在一实施例中,基站根据UE上报的各载频的同步定时信息,筛选出定时对齐的载频作为V2X载频集合。在一实施例中,如果基站配置UE使用mode4资源分配方式,基站可根据UE(包含该请求资源的UE或其它UE)上报的候选载频集合1或候选载频集合2中的各载频V2X资源池的CBR测量结果筛选出可用于UE传输的V2X载频得到候选载频集合3,基站向UE发送的V2X载频集合可根据各载频上资源池的CBR值进行排序,例如CBR值最低的载频/资源池排在第一位。
在一实施例中,参见上述实施例一所示,基站还可根据UE上报的QoS信 息确定是否采用多载频传输、或确定载频数量、或确定载频数据分流比例配置信息。当然这些过程也可由UE自己执行。
例如,在本步骤中,基站可根据UE上报的QoS信息判断相应的逻辑信道,或者逻辑信道组,或者目标标识对应的数据包是否使用多载波data duplication和/data split方式传输。例如,基站可根据UE上报的PPPP值,PPPP与reliability需求之间的映射关系计算得到reliability需求,然后根据reliability需求判断是否使用多载波data duplication方式传输。或者,基站也可根据UE上报的reliability需求信息判断是否使用多载波data duplication方式传输。或者,基站可根据UE上报的data rate,PPPP与data rate之间的映射关系计算得到data rate需求,然后根据data rate需求判断是否使用多载波data split方式传输。或者,基站也可根据UE上报的data rate需求信息判断是否使用多载波data split方式传输。
在一实施例中,若基站判断UE需采用多载波data duplication和/data split方式传输,则发送多载频指示信息给UE。
因此,在本实施例中,基站通过系统消息或RRC专有信令向UE发送的载频选择控制信息可包括以下信息中的至少一种:
1.载频列表:
1)用于传输的载频;或者,
2)根据CBR结果筛选后的有效候选载频集合;或者,
3)根据CBR结果排序的有效候选载频集合(例如排序后的候选载频集合3);
2.载频数量,指示需使用的载频数量或可使用的最大载频数量;
3.逻辑信道标识;
4.逻辑信道组标识;
5.目标标识或目标索引号;
6.多载频指示信息,用于指示是否使用多载频传输;
7.载频的数据分流比例;
8.资源池信息;
9.用于确定是否使用PC5多载频传输的信息:
1)优先级门限值,例如,若数据包的PPPP值大于优先级门限值,则不使用PC5CA功能;若数据包的PPPP值小于优先级门限值,则可使用PC5CA功能,包括data split,data duplication;
2)buffer size门限值;
3)data rate门限值;
4)delay budget门限值;
5)reliability门限值;
6)reliability和delay budget门限值;
7)buffer size和delay budget门限值;
10.用于确定是否使用PC5多载频和载频数量中的至少之一的信息:
1)buffer size范围与对应的载频数量;
2)data rate范围与对应的载频数量;
3)reliability范围与对应的载频数量;
4)packet delay budget范围和buffer size范围与对应的载频数量;
5)优先级与对应的载频数量,可为PPPP值/范围对应的载频个数;
11.用于确定载频是否可选择用于传输的信息:
1)CBR门限值;
2)CBR门限值及对应的优先级;
3)CBR门限值及对应的data rate;
4)CBR门限值及对应的reliablility;
5)CBR门限值及对应的packet delay budget;
6)CBR门限值及对应的频点;
7)CBR门限值及对应的资源池;
在步骤S903中,UE使用从基站获取的候选载频集合3中的载频进行PC5数据传输,此时基站执行了上述载频选择过程;或,UE在从基站接收的候选载频集合3中执行载频选择,此时由UE进行载频选择。
若UE从基站接收到的资源配置信息包含逻辑信道标识及对应的载频列表,则UE为逻辑信道中数据在对应的载频列表中执行后续载频选择(包括载频数量和具体载频)和资源选择。
若UE从基站接收到的资源配置信息包含逻辑信道组标识及对应的载频列表,则UE为逻辑信道组中数据在对应的载频列表中执行后续载频选择和资源选择。
若UE从基站接收到的资源配置信息包含目标标识及对应的载频列表,则UE根据数据的目标标识在对应的载频列表中执行后续载频选择和资源选择。
在一实施例中,对于每个逻辑信道,UE对基站配置的V2X载频列表(即 候选载频集合3)内V2X载频的资源池执行CBR测量,在一实施例中,V2X载频的资源池信息由UE从基站获得。
在一实施例中,UE根据各载频上的同步定时信息,筛选出定时对齐的载频作为V2X载频集合。
在一实施例中,若UE从基站获得CBR门限值,则使用CBR门限值用于判断V2X资源池所在载频是否可用于PC5传输。若UE从基站获得CBR门限值及对应的载频,则UE在该载频上使用对应的CBR门限值;若UE从基站获得CBR门限值及对应的资源池,则UE在该资源池上使用对应的CBR门限值;若UE从基站获得CBR门限值及对应的优先级,则UE根据需传输数据的优先级或在该逻辑信道传输的数据的优先级确定其对应的CBR门限值。若UE从基站获得CBR门限值及对应的data rate需求,则UE根据需传输数据的data rate需求或在该逻辑信道传输的数据的data rate需求确定其对应的CBR门限值。若UE从基站获得CBR门限值及对应的reliablility,则UE根据需传输数据的reliablility需求或在该逻辑信道传输的数据的reliablility需求确定其对应的CBR门限值。若UE从基站获得CBR门限值及对应的packet delay budget需求,则UE根据需传输数据的packet delay budget需求或在该逻辑信道传输的数据的packet delay budget需求确定其对应的CBR门限值。
UE根据各载频上V2X资源池的CBR测量结果判断该测量的资源池所在载频是否可用于传输,例如,若该资源池的CBR测量结果高于对应的CBR门限值,则UE认为该载频不可用于传输;若该资源池的CBR测量结果低于对应的CBR门限值,则UE认为该载频可用于传输。UE根据上述对基站配置的V2X列表的资源池的CBR测量过程筛选出候选载频集合4,即将不可用于传输的载频排除。在一实施例中,UE将候选载频集合4中频点根据各频点的CBR测量值进行排序,例如,将载频按照CBR测量值由小到大排序,则CBR测量值最小的频点排在第一位,依此类推。
在步骤S904中,判断是否使用多载频进行PC5数据传输。
在一实施例中,若基站有执行上述多载频传输配置信息的生成时,UE可根据从基站接收的配置信息判断是否使用多载频进行PC5数据传输,包括以data split和data duplication方式中的至少之一:
1)若UE从基站接收到的配置信息包含逻辑信道标识及对应的多载频指示信息,则UE根据多载频指示信息判断对应的逻辑信道是否使用多载频进行PC5 数据传输;
2)若UE从基站接收到的配置信息包含逻辑信道组标识及对应的多载频指示信息,则根据多载频指示信息判断对应的逻辑信道组是否使用多载频进行PC5数据传输;
3)若UE从基站接收到的配置信息包含目标标识及对应的多载频指示信息,则UE根据多载频指示信息判断对应的目标标识数据是否使用多载频进行PC5数据传输。
UE也可基于从基站获取的相应的门限值信息判断是否需要进行多载频传输,包括但不限于:
4)若UE从基站接收到优先级门限值信息,则UE根据要传输数据的优先级与优先级门限值信息判断是否可使用多载频进行PC5数据传输。例如,若要传输数据的优先级取值(如,PPPP)小于所配置的优先级门限值,则可使用多载频进行PC5数据传输;
5)若UE从基站接收到data rate门限值信息,则UE根据要传输数据的data rate需求与data rate门限值信息判断是否可使用多载频进行PC5数据传输。例如,若要传输数据的data rate需求大于所配置的data rate门限值,则可使用多载频进行PC5数据传输;
6)若UE从基站接收到buffer size门限值信息,则UE根据当前逻辑信道的buffer size大小与buffer size门限值信息判断是否可使用多载频进行PC5数据传输。例如,若当前逻辑信道的buffer size大于所配置的buffer size门限值,则可使用多载频进行PC5数据传输;
7)若UE从基站接收到reliability门限值信息,则UE根据需传输数据的reliability需求与reliability门限值信息判断是否可使用多载频进行PC5数据传输。例如,若需传输数据的reliability需求高于所配置的reliability门限值,则可使用多载频进行PC5数据传输;
8)若UE从基站接收到packet delay budget门限值信息,则UE根据需传输数据的packet delay budget与packet delay budget门限值信息判断是否可使用多载频进行PC5数据传输。例如,若需传输数据的packet delay budget小于所配置的packet delay budget门限值,则可使用多载频进行PC5数据传输。
在步骤S905中,确定载频数量。
在一实施例中,UE可自行根据需传输数据的业务标识信息或QoS信息确定 需使用的载频数量,在从基站接收的候选载频集合3或从候选载频集合4中选择一定数量载频。如果基站执行载频数量的确定即相应配置信息的生成,则UE可从基站获得载频数量配置信息,则根据所接收的载频数量配置信息在从基站接收的候选载频集合3或从候选载频集合4中选择一定数量载频。具体可分为以下几种情况:
1)若UE从基站接收到的资源配置信息包含逻辑信道标识及对应的载频数量,则UE为逻辑信道中数据选择对应的载频数量的载频进行传输;
2)若UE从基站接收到的资源配置信息包含逻辑信道组标识及对应的载频数量,则UE为逻辑信道组中数据选择对应的载频数量的载频进行传输;
3)若UE从基站接收到的资源配置信息包含目标标识及对应的载频数量,则UE为同一个目标标识的待发送数据选择对应的载频数量的载频进行传输;
4)若UE从基站接收到的资源配置信息包含buffer size范围与对应的载频数量,则UE根据逻辑信道当前的buffer size所处的范围,所配置的buffer size范围与载频数量的映射关系确定该逻辑信道需使用的载频数量或最大可使用的载频数量;
5)若UE从基站接收到的资源配置信息包含data rate范围与对应的载频数量,则UE根据需传输数据的data rate需求所处的范围,所配置的data rate需求范围与载频数量的映射关系确定该逻辑信道需使用的载频数量或最大可使用的载频数量;
6)若UE从基站接收到的资源配置信息包含reliability范围与对应的载频数量,则UE根据需传输数据的reliability需求所处的范围,所配置的reliability需求范围与载频数量的映射关系确定该逻辑信道需使用的载频数量或最大可使用的载频数量;
7)若UE从基站接收到的资源配置信息包含packet delay budget范围与对应的载频数量,则UE根据需传输数据的packet delay budget所处的范围,所配置的packet delay budget范围与载频数量的映射关系确定该逻辑信道需使用的载频数量或最大可使用的载频数量;
8)若UE从基站接收到的资源配置信息包含packet delay budget范围和buffer size范围与对应的载频数量,则UE根据需传输数据的packet delay budget所处的范围,逻辑信道当前的buffer size所处的范围,所配置的packet delay budget范围和buffer size范围与载频数量的映射关系确定该逻辑信道需使用的载频数 量或最大可使用的载频数量;
例如,基站可为UE配置buffer size 200-400字节,packet delay budget为50ms对应的载频数量为2,buffer size 200-400字节,packet delay budget为100ms对应的载频数量为1;
9)若UE从基站接收到的资源配置信息包含优先级与对应的载频数量,则UE根据逻辑信道所传输数据的优先级,所配置的优先级与载频数量的映射关系确定该逻辑信道需使用的载频数量或最大可使用的载频数量。
在步骤S906中,确定各载频上需传输的数量。
若UE判断需使用多载频进行PC5数据传输,并确定了需用于传输的载频,且UE未从基站接收载频的数据分流比例,则自行确定各个所选择的用于传输的载频上需传输的数据量,并根据sensing结果分别在各载频上执行后续资源选择。
或者,若UE判断需使用多载频进行PC5数据传输,并确定了需用于传输的载频,且UE从基站接收到的配置信息包含载频数据分流比例信息,则UE根据载频数据分流比例信息计算出各载频上需传输的数据量大小,并分别在各载频上执行后续资源选择。
在一实施例中,若UE从基站接收到的配置信息包含逻辑信道标识,载频列表及对应的载频数据分流比例,则UE为逻辑信道中数据使用对应的载频列表中载频进行传输,且根据所配置的各载频数据分流比例计算出各载频上需传输的数据量大小,并分别在各载频上执行后续资源选择。例如,当前逻辑信道1中需传输数据量大小为200字节,并确定使用载频1和载频2传输,若UE从基站接收的配置信息中载频1的数据分流比例为60%,载频2的数据分流比例为40%,则UE计算得出可使用载频1传输的数据量为120字节,可使用载频2传输的数据量为80字节。
若UE从基站接收到的配置信息包含逻辑信道组标识,载频列表及对应的载频数据分流比例,则UE为逻辑信道组中数据使用对应的载频列表中载频进行传输,且根据所配置的各载频数据分流比例计算出各载频上需传输的数据量大小,并分别在各载频上执行后续资源选择。
若UE从基站接收到的配置信息包含目标标识,载频列表及对应的载频数据分流比例,则UE为同一目标标识的数据使用对应的载频列表中载频进行传输,且根据所配置的各载频数据分流比例计算出各载频上需传输的数据量大小,并分别在各载频上执行后续资源选择。
应当理解的是,上述图9所示的各步骤也可自由组合,时间先后顺序可调整。
实施例五:
为了便于理解本申请,本实施例以V2X发送端设备为UE为示例,以UE处于RRC连接状态并采用mode 3进行说明。
RRC连接态的mode 3UE的发送载频选择方法,参见图10所示,包括:步骤S1001至步骤S1006。
在步骤S1001中,UE在符合条件(例如有V2X业务数据需要发送)时发送RRC消息给基站。
UE发送的RRC消息可以是sidelink UE information消息或UE assistance information消息,其中包含请求V2X sidelink传输资源的频点及对应的目标ID列表(v2x-DestinationInfoList,基站可通过目标ID推导出对应的V2X业务标识)。UE发送的RRC消息中包含的V2X载频为UE根据需传输数据的业务标识和业务标识与载频之间的映射关系得到候选载频集合1(即初始候选载频集合),或者,UE根据需传输数据的业务标识映射得到的候选载频集合1与基站支持的V2X载频集合(例如,包含服务载频及基站发送给UE的V2X异频频点)之间的交集,即候选载频集合2。在一实施例中,RRC消息中包含需请求资源的逻辑信道标识及对应的QoS信息,或者目标标识及对应的QoS信息,或者逻辑信道组标识及对应的QoS信息,也即包含需传输数据对应的QoS信息。在一实施例中,若同一个目标ID的V2X数据包含多种QoS需求,则PC5信令中仅包含多种QoS需求中最高QoS需求信息;若同一个逻辑信道组可用于传输多种QoS需求的数据,则该PC5信令中仅包含多种QoS需求中最高的QoS需求信息。在一实施例中,QoS信息包含以下之一或组合:data rate需求,reliability需求,优先级,packet delay budget。其中reliability需求可以为可靠性级别信息。在一实施例中,该RRC消息中包含各载频的同步定时信息。
如上述实施例一的分析所示,UE向基站发送的载频选择辅助信息包括以下信息至少一种:
逻辑信道标识;
逻辑信道组标识;
目标标识;
QoS信息;
载频数量;
多载频指示信息;其中多载频指示信息用于指示是否使用多载频传输,或者是否使用多载频data split传输,或者是否使用多载频data duplication传输,或者是否使用多载频data split和data duplication传输;
V2X载频;
各载波的同步定时信息;包括以下之一或组合:同步参考类型(UE,GNSS,基站);同步源所处覆盖状况(用于指示同步源在覆盖内还是覆盖外);同步源绝对定时值;
在步骤S1002中,eNB发送RRC连接重配置信息(RRC Connection Reconfiguration)给UE,其中包含资源分配模式指示信息(mode 3)和相应的配置信息。
基站可根据从UE接收的RRC消息中信息确定UE的资源分配模式生成相应的资源分配模式指示信息,并向UE发送相应的配置信息。在一实施例中,基站根据UE上报的各载频的同步定时信息,筛选出定时对齐的载频作为V2X载频集合。在一实施例中,如果基站配置UE使用mode3资源分配方式,基站可根据UE(包含该请求资源的UE或其它UE)上报的候选载频集合1或候选载频集合2中的各载频V2X资源池的CBR测量结果筛选出可用于UE传输的V2X载频得到候选载频集合3,基站向UE发送的V2X载频集合可根据各载频上资源池的CBR值进行排序,例如CBR值最低的载频/资源池排在第一位。
在一实施例中,参见上述实施例一所示,基站还可根据UE上报的QoS信息确定是否采用多载频传输、或确定载频数量、或确定载频数据分流比例配置信息。当然这些过程也可由UE自己执行。
例如,在本步骤中,基站可根据UE上报的QoS信息判断相应的逻辑信道,或者逻辑信道组,或者目标标识对应的数据包是否使用多载波data duplication和/data split方式传输。例如,基站可根据UE上报的PPPP值,PPPP与reliability需求之间的映射关系计算得到reliability需求,然后根据reliability需求判断是否使用多载波data duplication方式传输。或者,基站也可根据UE上报的reliability需求信息判断是否使用多载波data duplication方式传输。或者,基站可根据UE上报的data rate,PPPP与data rate之间的映射关系计算得到data rate需求,然后根据data rate需求判断是否使用多载波data split方式传输。或者,基站也可根据UE上报的data rate需求信息判断是否使用多载波data split方式传输。
在一实施例中,若基站判断UE需采用多载波data duplication和/data split方式传输,则发送多载频指示信息给UE。
因此,在本实施例中,基站通过系统消息或RRC专有信令向UE发送的载频选择控制信息可包括以下信息中的至少一种:
1.载频列表:
1)用于传输的载频;或者,
2)根据CBR结果筛选后的有效候选载频集合;或者,
3)根据CBR结果排序的有效候选载频集合(例如排序后的候选载频集合3);
2.载频数量,指示需使用的载频数量或可使用的最大载频数量;
3.逻辑信道标识;
4.逻辑信道组标识;
5.目标标识或目标索引号;
6.多载频指示信息,用于指示是否使用多载频传输;
7.载频的数据分流比例;
8.资源池信息;
9.用于确定是否使用PC5多载频传输的信息:
1)优先级门限值,例如,若数据包的PPPP值大于优先级门限值,则不使用PC5CA功能;若数据包的PPPP值小于优先级门限值,则可使用PC5CA功能,包括data split,data duplication;
2)buffer size门限值;
3)data rate门限值;
4)delay budget门限值;
5)reliability门限值;
6)reliability和delay budget门限值;
7)buffer size和delay budget门限值;
10.用于确定是否使用PC5多载频和载频数量中的至少之一的信息:
1)buffer size范围与对应的载频数量;
2)data rate范围与对应的载频数量;
3)reliability范围与对应的载频数量;
4)packet delay budget范围和buffer size范围与对应的载频数量;
5)优先级与对应的载频数量,可为PPPP值/范围对应的载频个数;
11.用于确定载频是否可选择用于传输的信息:
1)CBR门限值;
2)CBR门限值及对应的优先级;
3)CBR门限值及对应的data rate;
4)CBR门限值及对应的reliablility;
5)CBR门限值及对应的packet delay budget;
6)CBR门限值及对应的频点;
7)CBR门限值及对应的资源池;
在步骤S1003中,UE使用从基站获取的候选载频集合3中的载频进行PC5数据传输,此时基站执行了上述载频选择过程;或,UE在从基站接收的候选载频集合3中执行载频选择,此时由UE进行载频选择。
若UE从基站接收到的资源配置信息包含逻辑信道标识及对应的载频列表,则UE为逻辑信道中数据在对应的载频列表中执行后续载频选择(包括载频数量和具体载频)和资源选择。
若UE从基站接收到的资源配置信息包含逻辑信道组标识及对应的载频列表,则UE为逻辑信道组中数据在对应的载频列表中执行后续载频选择和资源选择。
若UE从基站接收到的资源配置信息包含目标标识及对应的载频列表,则UE根据数据的目标标识在对应的载频列表中执行后续载频选择和资源选择。
在一实施例中,对于每个逻辑信道,UE对基站配置的V2X载频列表(即候选载频集合3)内V2X载频的资源池执行CBR测量,在一实施例中,V2X载频的资源池信息由UE从基站获得。
在一实施例中,UE根据各载频上的同步定时信息,筛选出定时对齐的载频作为V2X载频集合。
在一实施例中,若UE从基站获得CBR门限值,则使用CBR门限值用于判断V2X资源池所在载频是否可用于PC5传输。若UE从基站获得CBR门限值及对应的载频,则UE在该载频上使用对应的CBR门限值;若UE从基站获得CBR门限值及对应的资源池,则UE在该资源池上使用对应的CBR门限值;若UE从基站获得CBR门限值及对应的优先级,则UE根据需传输数据的优先级或在该逻辑信道传输的数据的优先级确定其对应的CBR门限值。若UE从基站获得CBR门限值及对应的data rate需求,则UE根据需传输数据的data rate需求 或在该逻辑信道传输的数据的data rate需求确定其对应的CBR门限值。若UE从基站获得CBR门限值及对应的reliablility,则UE根据需传输数据的reliablility需求或在该逻辑信道传输的数据的reliablility需求确定其对应的CBR门限值。若UE从基站获得CBR门限值及对应的packet delay budget需求,则UE根据需传输数据的packet delay budget需求或在该逻辑信道传输的数据的packet delay budget需求确定其对应的CBR门限值。
UE根据各载频上V2X资源池的CBR测量结果判断该测量的资源池所在载频是否可用于传输,例如,若该资源池的CBR测量结果高于对应的CBR门限值,则UE认为该载频不可用于传输;若该资源池的CBR测量结果低于对应的CBR门限值,则UE认为该载频可用于传输。UE根据上述对基站配置的V2X列表的资源池的CBR测量过程筛选出候选载频集合4,即将不可用于传输的载频排除。在一实施例中,UE将候选载频集合4中频点根据各频点的CBR测量值进行排序,例如,将载频按照CBR测量值由小到大排序,则CBR测量值最小的频点排在第一位,依此类推。
在步骤S1004中,判断是否使用多载频进行PC5数据传输。
在一实施例中,若基站有执行上述多载频传输配置信息的生成时,UE可根据从基站接收的配置信息判断是否使用多载频进行PC5数据传输,包括以data split和data duplication方式中的至少一种:
1)若UE从基站接收到的配置信息包含逻辑信道标识及对应的多载频指示信息,则UE根据多载频指示信息判断对应的逻辑信道是否使用多载频进行PC5数据传输;
2)若UE从基站接收到的配置信息包含逻辑信道组标识及对应的多载频指示信息,则根据多载频指示信息判断对应的逻辑信道组是否使用多载频进行PC5数据传输;
3)若UE从基站接收到的配置信息包含目标标识及对应的多载频指示信息,则UE根据多载频指示信息判断对应的目标标识数据是否使用多载频进行PC5数据传输。
UE也可基于从基站获取的相应的门限值信息判断是否需要进行多载频传输,包括但不限于:
4)若UE从基站接收到优先级门限值信息,则UE根据要传输数据的优先级与优先级门限值信息判断是否可使用多载频进行PC5数据传输。例如,若要 传输数据的优先级取值(如,PPPP)小于所配置的优先级门限值,则可使用多载频进行PC5数据传输;
5)若UE从基站接收到data rate门限值信息,则UE根据要传输数据的data rate需求与data rate门限值信息判断是否可使用多载频进行PC5数据传输。例如,若要传输数据的data rate需求大于所配置的data rate门限值,则可使用多载频进行PC5数据传输;
6)若UE从基站接收到buffer size门限值信息,则UE根据当前逻辑信道的buffer size大小与buffer size门限值信息判断是否可使用多载频进行PC5数据传输。例如,若当前逻辑信道的buffer size大于所配置的buffer size门限值,则可使用多载频进行PC5数据传输;
7)若UE从基站接收到reliability门限值信息,则UE根据需传输数据的reliability需求与reliability门限值信息判断是否可使用多载频进行PC5数据传输。例如,若需传输数据的reliability需求高于所配置的reliability门限值,则可使用多载频进行PC5数据传输;
8)若UE从基站接收到packet delay budget门限值信息,则UE根据需传输数据的packet delay budget与packet delay budget门限值信息判断是否可使用多载频进行PC5数据传输。例如,若需传输数据的packet delay budget小于所配置的packet delay budget门限值,则可使用多载频进行PC5数据传输。
在步骤S1005中,确定载频数量。
在一实施例中,UE可自行根据需传输数据的业务标识信息或QoS信息确定需使用的载频数量,在从基站接收的候选载频集合3或从候选载频集合4中选择一定数量载频。如果基站执行载频数量的确定即相应配置信息的生成,则UE可从基站获得载频数量配置信息,则根据所接收的载频数量配置信息在从基站接收的候选载频集合3或从候选载频集合4中选择一定数量载频。具体可分为以下几种情况:
1)若UE从基站接收到的资源配置信息包含逻辑信道标识及对应的载频数量,则UE为逻辑信道中数据选择对应的载频数量的载频进行传输;
2)若UE从基站接收到的资源配置信息包含逻辑信道组标识及对应的载频数量,则UE为逻辑信道组中数据选择对应的载频数量的载频进行传输;
3)若UE从基站接收到的资源配置信息包含目标标识及对应的载频数量,则UE为同一个目标标识的待发送数据选择对应的载频数量的载频进行传输;
4)若UE从基站接收到的资源配置信息包含buffer size范围与对应的载频数量,则UE根据逻辑信道当前的buffer size所处的范围,所配置的buffer size范围与载频数量的映射关系确定该逻辑信道需使用的载频数量或最大可使用的载频数量;
5)若UE从基站接收到的资源配置信息包含data rate范围与对应的载频数量,则UE根据需传输数据的data rate需求所处的范围,所配置的data rate需求范围与载频数量的映射关系确定该逻辑信道需使用的载频数量或最大可使用的载频数量;
6)若UE从基站接收到的资源配置信息包含reliability范围与对应的载频数量,则UE根据需传输数据的reliability需求所处的范围,所配置的reliability需求范围与载频数量的映射关系确定该逻辑信道需使用的载频数量或最大可使用的载频数量;
7)若UE从基站接收到的资源配置信息包含packet delay budget范围与对应的载频数量,则UE根据需传输数据的packet delay budget所处的范围,所配置的packet delay budget范围与载频数量的映射关系确定该逻辑信道需使用的载频数量或最大可使用的载频数量;
8)若UE从基站接收到的资源配置信息包含packet delay budget范围和buffer size范围与对应的载频数量,则UE根据需传输数据的packet delay budget所处的范围,逻辑信道当前的buffer size所处的范围,所配置的packet delay budget范围和buffer size范围与载频数量的映射关系确定该逻辑信道需使用的载频数量或最大可使用的载频数量;
例如,基站可为UE配置buffer size 200-400字节,packet delay budget为50ms对应的载频数量为2,buffer size 200-400字节,packet delay budget为100ms对应的载频数量为1;
9)若UE从基站接收到的资源配置信息包含优先级与对应的载频数量,则UE根据逻辑信道所传输数据的优先级,所配置的优先级与载频数量的映射关系确定该逻辑信道需使用的载频数量或最大可使用的载频数量。
在步骤S1006中,确定各载频上需传输的数量。
若UE判断需使用多载频进行PC5数据传输,并确定了需用于传输的载频,且UE未从基站接收载频的数据分流比例,则自行确定各个所选择的用于传输的载频上需传输的数据量,并向基站发送BSR(Buffer Status Report,缓存状态报 告)以在相应的载频上请求PC5传输资源。
或者,若UE判断需使用多载频进行PC5数据传输,并确定了需用于传输的载频,且UE从基站接收到的配置信息包含载频数据分流比例信息,则UE根据载频数据分流比例信息计算出各载频上需传输的数据量大小,并向基站发送BSR以在相应的载频上请求PC5传输资源。
在一实施例中,若UE从基站接收到的配置信息包含逻辑信道标识,载频列表及对应的载频数据分流比例,则UE为逻辑信道中数据使用对应的载频列表中载频进行传输,且根据所配置的各载频数据分流比例计算出各载频上需传输的数据量大小,并向基站发送BSR以在相应的载频上请求PC5传输资源。例如,当前逻辑信道1中需传输数据量大小为200字节,并确定使用载频1和载频2传输,若UE从基站接收的配置信息中载频1的数据分流比例为80%,载频2的数据分流比例为20%,则UE计算得出可使用载频1传输的数据量为160字节,可使用载频2传输的数据量为40字节。
若UE从基站接收到的配置信息包含逻辑信道组标识,载频列表及对应的载频数据分流比例,则UE为逻辑信道组中数据使用对应的载频列表中载频进行传输,且根据所配置的各载频数据分流比例计算出各载频上需传输的数据量大小,并向基站发送BSR以在相应的载频上请求PC5传输资源。
若UE从基站接收到的配置信息包含目标标识,载频列表及对应的载频数据分流比例,则UE为同一目标标识的数据使用对应的载频列表中载频进行传输,且根据所配置的各载频数据分流比例计算出各载频上需传输的数据量大小,并向基站发送BSR以在相应的载频上请求PC5传输资源。
应当理解的是,上述图10所示的各步骤也可自由组合,时间先后顺序可调整。
通过本实施例提供的载频选择方法可以实现处于基站覆盖区的车辆用户之间的多载频通信(参见图11和图12所示)以及处于无覆盖区的车辆之间的多载频通信(参见图13所示),且当车辆用户处于基站覆盖区时,车辆用户之间的采用的载频和与基站通信采用的载频可以相同,可以不同。在一实施例中,图11中Vehicle UE1和Vehicle UE2之间采用载频f2、f3进行通信,Vehicle UE2与基站eNB采用载频f1进行通信。图12中Vehicle UE1和Vehicle UE2之间采用载频f1、f2进行通信,Vehicle UE2与基站eNB采用载频f1进行通信。图13中处于无覆盖区的Vehicle UE1和Vehicle UE2之间采用载频f2、f3进行通信。 且应当理解的是,Vehicle UE1和Vehicle UE2采用的载频数并不限于图示的两个,根据具体应用场景选择的具体个数可能不同。
实施例六:
对于V2X通信发送端设备采用多载频传输时,V2X通信接受端设备(也可能是车载终端或用户终端)由于其接收能力受限,对于发送方通过多个载频发送的V2X业务数据,有可能没有能力同时接收到这多个载频上发送的V2X业务数据,此时就需要改善接收能力受限的接收方UE如何确定需接收的载频的现象。
针对上述问题,本实施例还提供了一种PC5载频选择方法实现接收载频的选择,参见图14所示,包括:步骤S141和步骤S142。
在步骤S141中,获得业务标识对应的优先级或以优先级排序的业务标识列表。
V2X接收端设备可从基站接收业务标识及对应的优先级值,或者业务标识列表。在一实施例中,业务标识列表为根据业务的接收优先级进行排序的列表,例如,优先级最高的业务排在第一位,依次类推。基站可通过系统消息或RRC专有信令向UE发送业务标识及对应的优先级,或者业务标识列表。或者V2X接收端设备可基于预配置方式或从V2X control fuction或V2X application server获得业务标识及对应的优先级,或者业务标识列表。
在步骤S142中,根据业务标识对应的优先级或以优先级排序的业务标识列表,选择在PC5多载频接收能力支持的范围内能同时接收的M个较高优先级的业务对应的载频作为接收载频,所述M为大于等于1的整数。
接收方UE可确定自身感兴趣的V2X业务标识,并根据业务标识与V2X载频的映射关系得到感兴趣进行接收的V2X载频集合。也即V2X接收端设备根据获取的目标业务标识和预设的业务标识与载频映射关系得到各目标业务标识对应的载频。V2X接收端设备根据自身的PC5多载频接收能力信息判定不能同时在全部的感兴趣进行接收的载频上接收V2X业务数据时,按照各业务的业务标识对应的优先级从高到低的顺序,在PC5多载频接收能力信息支持的范围内选择能同时执行接收的M个业务。然后V2X接收端设备根据能同时执行接收的V2X业务,及V2X业务标识与V2X载频的映射关系得到需执行接收的载频集合;或者,在PC5多载频接收能力信息支持的范围内,按照业务标识列表中的顺序依次选择能同时接收的M个业务对应的载频作为接收载频。M为大于等于1的整数,PC5多载频接收能力信息包括支持同时进行PC5接收的频带组合 band combination信息,同时支持PC5和Uu接收的频带组合band combination信息以及接收链路Rx chain信息中的至少一种。
本实施例还提供了一种PC5载频选择装置,其可设置于V2X接收端设备中,参见图15所示,包括:业务获取模块151和载频获取模块152。
业务获取模块151,设置为获得业务标识对应的优先级或以优先级排序的业务标识列表。
业务获取模块151可从基站接收业务标识及对应的优先级值,或者业务标识列表。在一实施例中,业务标识列表为基站根据业务的优先级进行排序的列表,例如,优先级最高的业务排在第一位,依次类推。基站可通过系统消息或RRC专有信令向UE发送业务标识及对应的优先级,或者业务标识列表。或者V2X接收端设备可基于预配置方式或从V2X control function或V2X application server获得业务标识及对应的优先级,或者业务标识列表。然后V2X接收端设备可从获取到的业务标识获取目标业务标识(可以根据用户的选择或其他因素选择感兴趣的业务标识作为目标业务标识)。
载频获取模块152,设置为根据业务标识对应的优先级或以接收优先级排序的业务标识列表,选择在所述PC5多载频接收能力支持的范围内能同时接收的M个较高优先级的业务对应的载频作为接收载频,所述M为大于等于1的整数。
在一实施例中,载频获取模块152可设置为根据V2X接收端设备的PC5多载频接收能力信息判定V2X接收端设备不能同时在各目标业务标识对应的载频上接收V2X业务数据时,按照各目标业务标识对应的优先级从高到低的顺序,选择在PC5多载频接收能力信息支持的范围内能同时接收的M个载频作为接收载频;
M为大于等于1的整数,PC5多载频接收能力信息包括支持同时进行PC5接收的频带组合band combination信息,同时支持PC5和Uu接收的频带组合band combination信息以及接收链路Rx chain信息中的至少一种。
应当理解的是,上述各模块的功能可通过V2X接收端设备的处理器实现。
本实施例还提供了一种V2X接收端设备,参见图16所示,V2X接收端设备包括第三处理器161、第三存储器162及第三通信总线163;
第三通信总线163设置为实现第三处理器161和第三存储器162之间的连接通信;
第三处理器161设置为执行第三存储器162中存储的一个或者多个第三程 序,以实现如上所述的PC5载频选择方法的步骤;
或,
第三处理器161设置为执行第三存储器162中存储的一个或者多个第四程序,以实现如上所述的V2X业务数据接收方法的步骤。
本实施例还提供了一种计算机存储介质,该计算机可读存储介质存储有一个或者多个程序,所述一个或者多个程序被一个或者多个处理器执行,以实现如上所述的PC5载频选择方法的步骤。
为了便于理解本申请,本实施例以一个完整的接收方UE的接收载频选择方法为示例进行说明,参见图17所示,包括:步骤S171、步骤S172和步骤S173。
在步骤S 171中,接收方UE获取业务标识及对应的优先级值或者业务标识列表。
UE可从基站接收业务标识及对应的优先级值,或者业务标识列表。在一实施例中,业务标识列表为基站根据业务的优先级进行排序的列表,例如,优先级最高的业务排在第一位,依次类推。基站可通过系统消息或RRC专有信令向UE发送业务标识及对应的优先级,或者业务标识列表。或者UE可基于预配置方式或从V2X control function或V2X application server获得业务标识及对应的优先级,或者业务标识列表。
在步骤S172中,接收方UE确定自身感兴趣的V2X业务标识,并根据V2X业务标识与V2X载频的映射关系得到感兴趣进行接收的V2X载频集合。
在步骤S173中,接收方UE根据自身PC5CA接收能力确定能同时监听的载频集合,并进行载频的选择。
在该步骤中,若UE不能同时在其感兴趣的V2X载频集合中监听,则根据业务标识及对应的优先级,或者业务标识列表,按照业务的优先级从高到低在感兴趣的V2X业务中选择可以同时监听的V2X业务。最后,接收方UE根据可同时监听的V2X业务,及V2X业务标识与V2X载频的映射关系得到需同时监听的载频集合。在一实施例中,UE的PC5CA接收能力信息包括以下之一或组合:1)同时进行PC5接收的band combination信息;2)同时进行PC5/Uu接收的band combination信息;3)Rx chain数量;
例如V2X业务1可在frequency 1,2上传输,V2X业务2可在frequency 3,4,5上传输,V2X业务3可在frequency 6,7上传输,优先级从高到低排序为:V2X业务1,V2X业务2,V2X业务3,假设UE对V2X业务1,2,4感兴趣, 但根据UE的PC5CA能力只能同时在两个PC5频点上同时监听,则UE确定只在V2X业务1对应的f1和f2上进行监听,从而保证对感兴趣的高优先级的业务数据进行接收,提升用户体验的满意度。
显然,本领域的技术人员应该明白,上述本申请实施例的各模块或各步骤可以用通用的计算装置来实现,它们可以集中在单个的计算装置上,或者分布在多个计算装置所组成的网络上,在一实施例中,它们可以用计算装置可执行的程序代码来实现,从而,可以将它们存储在计算机存储介质(ROM/RAM、磁碟、光盘)中由计算装置来执行,并且在某些情况下,可以以不同于此处的顺序执行所示出或描述的步骤,或者将它们分别制作成各个集成电路模块,或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。所以,本申请不限制于任何特定的硬件和软件结合。
Claims (21)
- 一种PC5载频选择方法,包括:根据V2X业务数据的业务标识和业务标识与载频映射关系得到所述V2X业务数据的初始候选载频集合;根据载频选择信息从所述初始候选载频集合中选择所述V2X业务数据的传输载频。
- 如权利要求1所述的PC5载频选择方法,其中,所述载频选择信息包括以下至少一种:同步参考定时信息、服务质量QoS信息,以及V2X发送端设备PC5多载频发送能力信息和载频选择控制信息;所述载频选择控制信息包括以下至少一种:逻辑信道标识、逻辑信道组标识、目标标识、资源池信息、载频列表、载频数量、CBR门限值、多载频指示信息、用于确定是否使用多载频的信息、用于确定载频数量的信息,以及载频数据分流比例;所述用于确定是否使用多载频的信息包括以下至少之一:邻近服务数据包优先级PPPP优先级门限值;数据速率data rate数据速率门限值;缓冲区数据量buffer size门限值;reliability可靠性门限值;以及包延时delay budget预算门限值;所述用于确定载频数量的信息包括以下至少之一:缓冲区数据量buffer size范围与对应的载频数量;数据速率data rate范围与对应的载频数量;数据可靠性reliability范围与对应的载频数量;数据包时延预算packet delay budget范围和buffer size范围与对应的载频数量;以及优先级与对应的载频数量。
- 如权利要求1所述的PC5载频选择方法,其中,所述载频选择控制信息通过系统消息或RRC专有信令从基站获取,或通过预配置获取,或从V2X control function获取,或从V2X application server获取。
- 如权利要求2所述的PC5载频选择方法,其中,所述根据载频选择信息从所述初始候选载频集合中选择所述V2X业务数据的传输载频包括:所述载频选择控制信息包括所述CBR门限值时,将所述初始候选载频集合中,载频上V2X资源池的信道繁忙比率CBR测量值大于该载频上V2X资源池的信道繁忙比率CBR门限值的载频排除;或者,将所述初始候选载频集合中,载频上V2X资源池的信道繁忙比率CBR测量值大于该载频上V2X资源池的信道繁忙比率CBR门限值的载频排除,且 将所述初始候选载频集合中的载频,按照各载频上V2X资源池的信道繁忙比率CBR测量值从小到大的顺序依次排列。
- 如权利要求1-4任一项所述的PC5载频选择方法,所述从所述有效候选载频集合中选择所述V2X业务数据的传输载频之前,还包括判断所述V2X业务数据是否采用多载频传输;所述判断所述V2X业务数据是否采用多载频传输包括:根据多载频指示信息判断所述V2X业务数据是否采用多载频传输;或,根据所述V2X业务数据的传输参数与对应的传输参数门限值判断所述V2X业务数据是否采用多载频传输;或,根据所述V2X业务数据的传输参数与对应的载频数量判断所述V2X业务数据是否采用多载频传输;所述传输参数包括以下至少一种:缓冲区数据量buffer size和服务质量QoS信息中的至少一种,所述服务质量QoS信息包括邻近服务数据包优先级PPPP、数据速率data rate、数据可靠性reliability、数据包时延预算packet delay budget。
- 如权利要求1-4任一项所述的PC5载频选择方法,其中,根据载频选择信息从所述初始候选载频集合中选择所述V2X业务数据的传输载频包括:根据所述V2X业务数据的传输参数与对应的载频数量确定所述V2X业务数据传输需采用的载频数量,或根据所接收的载频数量确定所述V2X业务数据传输需采用的载频数量;根据确定的载频数量从所述有效候选载频集合中选择对应个数的载频作为所述V2X业务数据的传输载频;或,从所述初始候选载频集合中选择一个载频对所述V2X业务数据进行传输;根据监听结果判定选择的载频是否满足所述V2X业务数据的传输需求,如否,再从所述初始候选载频集合选一个载频对所述V2X业务数据进行传输,直到选择的载频个数满足所述V2X业务数据的传输需求;所述传输参数包括以下至少一种:缓冲区数据量buffer size和服务质量QoS信息中的至少一种,所述服务质量QoS信息包括邻近服务数据包优先级PPPP、数据速率data rate、数据可靠性reliability、数据包时延预算packet delay budget。
- 如权利要求1所述的PC5载频选择方法,根据载频选择信息从所述初始候选载频集合中选择所述V2X业务数据的传输载频之前,还包括:发送RRC消息给基站,所述RRC消息包括载频选择辅助信息,所述载频选择辅助信息包括V2X载频信息。
- 如权利要求7所述的PC5载频选择方法,其中,所述载频选择辅助信息包括以下至少一种:同步定时信息,所述V2X发送端设备的PC5多载频发送能力信息、逻辑信道标识、逻辑信道组标识、目标标识、QoS信息、载频数量、以及多载频指示信息;所述同步定时信息包括以下至少一种::同步参考类型;同步源所处覆盖状况;同步源绝对定时值;所述QoS信息包括邻近服务数据包优先级PPPP、数据速率data rate、数据可靠性reliability、以及数据包时延预算packet delay budget。
- 如权利要求2所述的PC5载频选择方法,根据载频选择信息从所述初始候选载频集合中选择所述V2X业务数据的传输载频之后,还包括:根据所述载频数据分流比例确定选择的各载频上需传输的数据量大小。
- 一种PC5载频选择方法,包括:接收V2X发送端设备发送的载频选择辅助信息,所述载频选择辅助信息包括根据V2X业务数据的业务标识和业务标识与载频映射关系得到所述V2X业务数据的初始候选载频集合;向所述V2X发送端设备发送载频选择控制信息。
- 如权利要求10所述的PC5载频选择方法,其中,所述载频选择控制信息包括以下至少一种:逻辑信道标识、逻辑信道组标识、目标标识、资源池信息、载频列表、载频数量、CBR门限值、多载频指示信息、用于确定是否使用多载频的信息、用于确定载频数量的信息,以及载频数据分流比例;所述用于确定是否使用多载频的信息包括以下至少之一:邻近服务数据包优先级PPPP门限值;数据速率data rate门限值;缓冲区数据量buffer size门限值;reliability可靠性门限值;以及包延时delay budget预算门限值;所述用于确定载频数量的信息包括以下至少之一:缓冲区数据量buffer size范围与对应的载频数量;数据速率data rate范围与对应的载频数量;数据可靠性reliability范围与对应的载频数量;数据包时延预算packet delay budget范围和buffer size范围与对应的载频数量;以及优先级与对应的载频数量。
- 如权利要求10或11所述的PC5载频选择方法,其中,包括以下至少 一种:所述载频选择辅助信息包括同步定时信息、所述V2X发送端设备的PC5多载频发送能力信息;
- 如权利要求10或11所述的PC5载频选择方法,其中,所述载频选择辅助信息还包括逻辑信道标识,逻辑信道组标识,目标标识,QoS信息,载频数量,多载频指示信息,以及V2X载频中的至少一种;所述同步定时信息包括以下至少一种:同步参考类型,同步源所处覆盖状况,以及同步源绝对定时值。
- 一种PC5载频选择方法,包括:获得业务标识对应的优先级或以优先级排序的业务标识列表;根据业务标识对应的优先级或以优先级排序的业务标识列表,选择在所述PC5多载频接收能力支持的范围内能同时接收的M个较高优先级的业务对应的载频作为接收载频,所述M为大于等于1的整数。
- 如权利要求14所述的PC5载频选择方法,其中,所述业务标识对应的优先级或以优先级排序的业务标识列表通过系统消息或RRC专有信令从基站获取,或通过预配置获取,或从V2X control function获得,或从V2X application server获取。
- 一种PC5载频选择装置,包括:初始选择模块,设置为根据V2X业务数据的业务标识和业务标识与载频映射关系得到所述V2X业务数据的初始候选载频集合;载频确定模块,设置为根据载频选择信息从所述初始候选载频集合中选择所述V2X业务数据的传输载频。
- 一种PC5载频选择装置,包括:信息接收模块,设置为接收V2X发送端设备发送的载频选择辅助信息,所述载频选择辅助信息包括根据V2X业务数据的业务标识和业务标识与载频映射关系得到所述V2X业务数据的初始候选载频集合;配置处理模块,设置为向所述V2X发送端设备发送载频选择控制信息。
- 一种PC5载频选择装置,包括:业务获取模块,设置为获得业务标识对应的优先级或以优先级排序的业务标识列表;载频获取模块,设置为根据业务标识对应的优先级或以接收优先级排序的业务标识列表,选择在所述PC5多载频接收能力支持的范围内能同时接收的M个较高优先级的业务对应的载频作为接收载频,所述M为大于等于1的整数。
- 一种V2X发送端设备,所述V2X发送端设备包括第一处理器、第一存储器及第一通信总线;所述第一通信总线设置为实现第一处理器和第一存储器之间的连接通信;所述第一处理器设置为执行第一存储器中存储的一个或者多个第一程序,以实现如权利要求1至9中任一项所述的PC5载频选择方法。
- 一种基站,所述基站包括第二处理器、第二存储器及第二通信总线;所述第二通信总线设置为实现第二处理器和第二存储器之间的连接通信;所述第二处理器设置为执行第二存储器中存储的二个或者多个第二序,以实现如权利要求10至13中任一项所述的PC5载频选择方法。
- 一种V2X接收端设备,所述V2X接收端设备包括第三处理器、第三存储器及第三通信总线;所述第三通信总线设置为实现第三处理器和第三存储器之间的连接通信;所述第三处理器设置为执行第三存储器中存储的至少一个第三程序,以实现如权利要求14或15所述的PC5载频选择方法。
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