CN111432498B - Internet of vehicles communication resource multiplexing method, device and system - Google Patents

Internet of vehicles communication resource multiplexing method, device and system Download PDF

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CN111432498B
CN111432498B CN201910021801.9A CN201910021801A CN111432498B CN 111432498 B CN111432498 B CN 111432498B CN 201910021801 A CN201910021801 A CN 201910021801A CN 111432498 B CN111432498 B CN 111432498B
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sidelink
uplink
service
resource
resources
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CN111432498A (en
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沈霞
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China Academy of Information and Communications Technology CAICT
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China Academy of Information and Communications Technology CAICT
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/12—Wireless traffic scheduling
    • H04W72/1263—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows
    • H04W72/1268—Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows of uplink data flows
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access, e.g. scheduled or random access
    • H04W74/002—Transmission of channel access control information
    • H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
    • 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]
    • H04W4/44—Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for communication between vehicles and infrastructures, e.g. vehicle-to-cloud [V2C] or vehicle-to-home [V2H]

Abstract

The application provides a method, a device and a system for multiplexing communication resources of the Internet of vehicles, wherein the method comprises the following steps: when determining that a sidelink service arrives and enough sidelink resources are not obtained, if determining that the service requirement parameter of the sidelink service meets a first preset multiplexing condition, storing uplink resource multiplexing information which is that a special resource obtained for uplink service can be pre-occupied by the sidelink service, and the obtained special resource for uplink service transmission meets the resource requirement of the arrived sidelink service transmission, and using the obtained special resource for uplink service to transmit the sidelink service; and transmitting an uplink pre-occupation signaling to inform the base station that no uplink data is transmitted at the position of the uplink resource occupied by the sidelink service. The method can reduce the signaling overhead and the time delay of channel access under the condition of no transmission collision.

Description

Internet of vehicles communication resource multiplexing method, device and system
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method, an apparatus, and a system for multiplexing communication resources of internet of vehicles.
Background
The internet of vehicles (V2X) incorporates a communication link (sidelink) between vehicle terminals (V-UEs) to support direct communication between the vehicle V-UEs, as compared to conventional cellular communication. In the sidelink communication of 5G NR V-UE, the resource allocation of the sidelink supports two modes of base station scheduling-based and distributed interception selection:
And (3) base station scheduling: the V-UE sends a sidelink transmission resource request to the base station, and the base station informs the V-UE of a resource allocation result through downlink control signaling DCI;
distributed interception: the V-UE firstly monitors the occupied state of the channel and selects the idle channel for access. The interception includes the decoding detection of the received control Signaling (SCI) indicating the sidelink resource allocation, the energy detection of the channel occupation and other modes, so as to judge the channel occupation state.
The distributed interception selection can be used for a scene with base station coverage or a scene without base station coverage based on base station scheduling. When there is no base station coverage, then the sidelink communication acquires channel resources by means of distributed interception selection or pre-allocated channel resources by the base station before moving out of the base station coverage.
Because the sidelink communication is all sent by the terminal, in the standard design, the sidelink communication time slot is selected to be multiplexed with the uplink time slot, i.e. in one uplink transmission time slot, the vehicle terminal will perform uplink transmission or sidelink transmission. The services corresponding to the uplink transmission and the sidelink transmission may be classified into different priorities and different corresponding QoS requirements.
When a service related to the sidelink transmission of the vehicle terminal arrives, a base station is adopted for scheduling, then a resource request is required to be sent to the base station through an uplink UCI, the base station indicates a resource allocation result through downlink DCI (under the condition that a pre-configured resource is not obtained), the sidelink communication is carried out in a subsequent uplink time slot, and the mode requires signaling overhead and a certain signaling interaction time length between the base station and the base station; or distributed interception is adopted, on one hand, a certain interception time is needed, and on the other hand, distributed selection has probability of transmission collision and interception of idle channel resources is insufficient to meet the quality of service (QoS) requirements of the current service. According to the analysis, a certain channel access time delay and other problems are required by adopting base station scheduling and distributed interception, so that the QoS requirement of the sidelink transmission is affected.
Similarly, when a service related to uplink transmission arrives at the vehicle terminal, a base station needs to send a resource request to the base station through uplink UCI, and after the base station indicates a resource allocation result through downlink DCI (under the condition that a pre-configured resource is not obtained), uplink communication is performed in a subsequent uplink timeslot.
The related technologies for the above-mentioned sidelink transmission problem include:
the sidelink transmission is not monitored, and resources are directly selected in a sidelink transmission resource pool to be transmitted. The method has a certain probability of transmission collision.
The sidelink already obtains the special pre-configured resource, and can directly select the resource for transmission when the service arrives.
The existing relevant technology for the uplink transmission problem is uplink scheduling-free transmission, a base station divides a special resource pool for scheduling-free, and when the uplink service of terminal equipment arrives, resources are directly selected from the scheduling-free resource pool for transmission. The method has a certain probability of transmission collision when reducing the signaling overhead and time delay of channel access.
Disclosure of Invention
In view of this, the present application provides a method, apparatus and system for multiplexing internet of vehicles communication resources, which can reduce signaling overhead and time delay of channel access without transmission collision.
In order to solve the technical problems, the technical scheme of the application is realized as follows:
a system for multiplexing internet of vehicles communication resources, the system comprising: a base station and a vehicle terminal V-UE;
the base station configures resource multiplexing information for the V-UE and informs the corresponding V-UE; wherein the resource multiplexing information includes: uplink resource multiplexing information; when the position of the uplink resource occupied by the communication link sidelink service notified by the V-UE is free of uplink data, the data at the corresponding resource position is not used as the uplink data;
V-UE as a transmitting node stores the resource multiplexing information notified by the base station when receiving the resource multiplexing information; when determining that a sidelink service arrives and a sidelink resource sufficient for transmitting the sidelink service is not obtained, if determining that a service requirement parameter of the sidelink service meets a first preset multiplexing condition, storing uplink resource multiplexing information that a special resource obtained for uplink service can be pre-occupied by the sidelink service and the obtained special resource for uplink service transmission meets a resource requirement of the arrived sidelink service transmission, and transmitting the sidelink service by using the obtained special resource for uplink service; and transmitting an uplink pre-occupation signaling to inform the base station that no uplink data is transmitted at the position of the uplink resource occupied by the sidelink service.
A multiplexing method of communication resources of the Internet of vehicles is applied to a vehicle terminal V-UE, and comprises the following steps:
receiving and storing resource multiplexing information notified by a base station; wherein the resource multiplexing information includes: uplink resource multiplexing information;
when determining that a communication link sidelink service arrives and sidelink resources sufficient for transmitting the sidelink service are not obtained, if determining that the service requirement parameter of the sidelink service meets a first preset multiplexing condition, storing uplink resource multiplexing information which is a special resource obtained for uplink service can be pre-occupied by the sidelink service, and the obtained special resource for uplink service transmission meets the resource requirement of the arrived sidelink service transmission, and transmitting the sidelink service by using the obtained special resource for uplink service;
And sending an uplink pre-occupation signaling to inform the base station that no uplink data is sent at the position of the uplink resource occupied by the sidelink service, so that the base station does not use the data at the corresponding resource position as the uplink data.
An internet of vehicles communication resource multiplexing apparatus comprising a processor for performing the steps of an internet of vehicles communication resource multiplexing method.
A non-transitory computer readable storage medium storing instructions that, when executed by a processor, cause the processor to perform the steps of a method of internet of vehicles communication resource multiplexing.
According to the technical scheme, when the sidelink service of the vehicle networking terminal (V-UE) reaches and uplink resource allocation is obtained, uplink resources can be preempted for sidelink service transmission; and when the uplink service of the Internet of vehicles reaches and the sidelink transmission resource is obtained, the uplink service transmission can be performed by preempting the sidelink resource. The method can reduce the signaling overhead and the time delay of channel access under the condition of no transmission collision.
Drawings
Fig. 1 is a schematic diagram of an internet of vehicles communication resource multiplexing system in an embodiment of the present application;
Fig. 2 is a schematic diagram of transmitting uplink pre-emption signaling after transmitting sidelink service using the obtained dedicated resources for uplink service;
fig. 3 (a) is a schematic diagram of an uplink pre-emption signaling multiplexing PSCCH;
fig. 3 (b) is a schematic diagram of uplink pre-emption signaling and PSCCH transmission respectively;
fig. 4 is a schematic diagram of signaling a sidelink preemption after transmitting the uplink traffic using the obtained resources for sidelink traffic transmission;
fig. 5 (a) is a schematic diagram of a signaling multiplexing PUCCH for sidelink preemption;
fig. 5 (b) is a schematic diagram of independent transmission of a sidelink pre-occupation signaling and a PUCCH;
fig. 6 is a schematic diagram of an uplink resource multiplexing flow of internet of vehicles communication;
fig. 7 is a schematic diagram of a communication sidelink resource multiplexing flow of the internet of vehicles.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below by referring to the accompanying drawings and examples.
The embodiment of the application provides a multiplexing method of communication resources of the Internet of vehicles, which can preempt uplink resources for transmitting the sidelink service when the sidelink service of V-UE reaches and uplink resource allocation is obtained; or when the uplink service of the Internet of vehicles reaches and the sidelink transmission resource is obtained, the uplink service transmission can be performed by preempting the sidelink resource. The method can reduce the signaling overhead and the time delay of channel access under the condition of no transmission collision.
The Internet of vehicles communication resource multiplexing method is applied to an Internet of vehicles communication resource multiplexing system. Referring to fig. 1, fig. 1 is a schematic diagram of an internet of vehicles communication resource multiplexing system in an embodiment of the present application. The system comprises: base station, V-UE;
the base station configures resource multiplexing information for the V-UE, wherein the resource multiplexing information comprises: uplink resource multiplexing information and sidelink resource multiplexing information; and notifies the corresponding V-UE.
When informing the resource multiplexing information, the base station transmits through Radio Resource Control (RRC) signaling informing parameters of a special uplink service channel (PUSCH) and a physical direct communication service channel (PSSCH), wherein fields for indicating the sidelink resource multiplexing information and the uplink resource multiplexing information are added in the RRC signaling and are used for carrying the sidelink resource multiplexing information and the uplink resource multiplexing information respectively.
When configuring the PUSCH and PSSCH parameters dedicated to the V-UE through RRC signaling, the base station includes fields indicating uplink pre-emption and sidelink pre-emption in PUSCH-config and PSSCH-config respectively to indicate whether uplink and sidelink resources support to be pre-occupied, which is specifically implemented as follows:
uplink preemption: setting a value to indicate that uplink resources can be pre-occupied by the sidelink service of the V-UE; and, the uplink resource can not be pre-occupied by the sidelink business of the V-UE; e.g. can be occupied with a value of 1; the unoccupied value of 0;
The desirability pre-project: setting a value to indicate that the sidelink resource can be pre-occupied by the uplink service of the V-UE; and the sidelink resource can not be pre-occupied by the uplink service of the UE, such as being occupied and represented by a value of 1; the unoccupied value of 0;
the PUSCH-config and PSSCH-config described above may have the same or different PUSCH or PSSCH configurations for one BWP.
When supporting uplink and sidelink resource multiplexing through PUSCH-config, V-UE needs to monitor the transmission on the corresponding uplink BWP; when supporting uplink and sidelink resource multiplexing through PSSCH-config, the base station needs to monitor the transmission on the corresponding sidelink BWP.
The V-UE can send an uplink request to change the uplink pre-transmission and the desiringpre-transmission field configuration corresponding to the PUSCH-config and the PSSCH-config; the base station can also actively modify the uplink and sidelink pre-emption field configurations corresponding to the PUSCH-config and the PSSCH-config, and send the uplink and sidelink pre-emption field configurations to the corresponding V-UE.
And V-UE, when receiving the resource multiplexing information notified by the base station, storing.
Each V-UE may determine whether a corresponding channel resource is currently obtained, where the channel resource includes a sidelink and an uplink obtained resource; so that when uplink traffic or sidelink traffic arrives, the existing resources are used for transmission, and the specific determination process is as follows:
Case 1: V-UE does not obtain the dedicated sidelink and uplink transmission resource indicated by the downlink DCI of the base station; indicating that the V-UE does not send corresponding sidelink transmission resources and uplink transmission resource requests or does not obtain corresponding authorization after being sent;
case 2: V-UE sends out SCI indicated dedicated sidelink transmission resource through base station downlink DCI indication or distributed interception, and does not obtain dedicated uplink transmission resource through DCI indication; indicating that the V-UE has a sidelink service transmission requirement and has obtained a special authorized resource, and does not send a corresponding uplink transmission resource request or has sent the corresponding uplink transmission authorization;
case 3: the V-UE obtains a special uplink transmission resource through a downlink DCI indication of a base station, and obtains a special sidelink transmission resource without sending out an SCI indication through the DCI indication or distributed interception; indicating that the V-UE has an uplink service transmission requirement and has obtained a special authorized resource, and does not send a corresponding sidelink transmission resource request or has sent that does not obtain a corresponding sidelink transmission authorization;
case 4: V-UE sends out SCI indicated dedicated sidelink transmission resource through base station downlink DCI indication or distributed interception, and obtains dedicated uplink transmission resource through DCI indication; indicating that the V-UE has had uplink and sidelink traffic transmission requirements and has been authorized.
Wherein case 1 indicates that the V-UE does not obtain any dedicated grant resource, case 2 indicates that the V-UE has only obtained sidelink transmission resources, case 3 indicates that the V-UE has only obtained uplink transmission resources, and case 4 indicates that the V-UE has obtained uplink and sidelink transmission resources.
The process flow when determining that a sidelink service arrives is as follows:
and the transmission of the sidelink service cannot be performed in the case 1.
For the case 2, determining whether the obtained sidelink transmission resource meets the transmission of the arrived sidelink service, if so, using the obtained sidelink transmission resource for transmission; otherwise, the sidelink service transmission cannot be performed.
For the case 4, determining whether the obtained sidelink transmission resource meets the transmission of the arrived sidelink service, if so, using the obtained sidelink transmission resource for transmission; otherwise, determining that the resources for transmitting the sidelink service are not obtained.
For the case 3 (there is no available sidelink transmission resource) and the case 4 (the existing sidelink transmission resource does not satisfy the transmission of the arriving sidelink service), if it is determined that the resource for transmitting the sidelink service is not obtained, the following processing is performed:
the method comprises the steps that a first step, when V-UE serving as a receiving point determines that a sidelink service arrives and a sidelink resource enough for transmitting the sidelink service is not obtained, whether a service requirement parameter of the sidelink service meets a first preset multiplexing condition or not is determined, and if yes, a second step is executed; otherwise, ending, namely not occupying the uplink resource to transmit the sidelink service.
The service requirement parameters include service priority, qos, etc., and the first preset multiplexing conditions are configured according to actual requirements, for example: the service priority is higher than the priority of the current uplink transmission service, and if no uplink transmission is currently performed, the lowest priority of the current uplink transmission service is determined; qos is greater than a preset quality of service, etc.
Step two, the V-UE determines whether the special resources obtained for the uplink service in the stored uplink resource multiplexing information can be pre-occupied by the sidelink service, if so, the step three is executed; otherwise, ending, namely not occupying the uplink resource to transmit the sidelink service.
Thirdly, the V-UE determines whether the obtained special resources for uplink service transmission meet the resource requirements of the arrived sidelink service transmission, if so, the fourth step is executed; otherwise, ending, namely not occupying the uplink resource to transmit the sidelink service.
The V-UE determines whether the obtained dedicated resources for uplink traffic transmission meet the resource requirements of the arriving sidelink traffic transmission, e.g., meet the traffic transmission QoS index, etc.; the condition for specifically meeting the resource requirement of the sidelink service transmission can be set according to the actual requirement.
If it is determined that the service requirement parameter of the sidelink service meets the first preset multiplexing condition, the stored uplink resource multiplexing information is that dedicated resources obtained for uplink service can be pre-occupied by the sidelink service, and the obtained dedicated resources for uplink service transmission meet the resource requirement of the arriving sidelink service transmission, and executing the fourth step; otherwise, ending, namely not occupying the uplink resource to transmit the sidelink service.
The V-UE transmits the sidelink service by using the obtained special resources for uplink service; and transmitting an uplink pre-occupation signaling to inform the base station that no uplink data is transmitted at the position of the uplink resource occupied by the sidelink service.
The V-UE may be sent after the acquired dedicated resources for uplink traffic are used to transmit the sidelink service, or may be sent before the acquired dedicated resources for uplink traffic are used to transmit the sidelink service, where the specific implementation is as follows:
the first specific implementation of sending uplink preemption signaling after transmitting the sidelink service using the obtained dedicated resources for uplink service:
after transmitting the sidelink service by using the obtained dedicated resource for uplink service, the V-UE serving as a transmitting node selects a PUCCH scheduled by a next base station after the sidelink occupies the uplink resource to transmit an uplink pre-occupation signaling, and informs the base station that no uplink data is transmitted at the position of the uplink resource occupied by the sidelink service;
and when the base station receives the uplink pre-occupation signaling, determining that the detected data at the resource position indicated by the uplink pre-occupation signaling is invalid.
Referring to fig. 2, fig. 2 is a schematic diagram illustrating uplink camping signaling transmitted after transmitting a sidelink service using an obtained dedicated resource for the uplink service.
In fig. 2, V-UE transmits PSCCH and PSSCH corresponding to the sidelink transmission according to the sidelink service transmission requirement, where PSCCH and PSSCH are scrambled with corresponding sidelink transmission identifier (if any). And the V-UE selects a PUCCH scheduled by the next base station after the uplink occupied by the uplink resource to send an uplink pre-emption signaling (uplink pre-emption signaling) to inform the base station that no data transmission exists at the detected corresponding occupied time-frequency resource position, wherein the resource position contained in the uplink pre-emption signaling corresponds to the resource position occupied by the uplink service.
The second specific implementation of sending uplink preemption signaling before transmitting the sidelink service using the obtained dedicated resources for uplink service:
before transmitting the sidelink service by using the obtained dedicated resource for uplink service, the V-UE as a receiving point occupies the obtained PUSCH part resource to transmit a PUCCH bearing uplink pre-occupied signaling to the base station, and transmits PSCCH and PSSCH which are occupied for the uplink transmission to the sidelink receiving node, wherein one or more null symbols are continuously transmitted on the PUSCH resource when the PSCCH or the PUCCH is transmitted to indicate that the uplink resource is occupied by other service, and a control signaling instruction is transmitted,
When the base station receives the uplink pre-occupation signaling, the base station does not detect data or does not have invalid uplink data detected at the resource position indicated by the instruction; and when the PUSCH detects one or more continuous empty symbols, determining that the uplink resource is occupied by the sidelink service, and sending out an indication signaling.
Referring to fig. 3 (a), fig. 3 (a) is a schematic diagram of uplink pre-emption signaling multiplexing PSCCH.
Referring to fig. 3 (b), fig. 3 (b) is a schematic diagram of uplink pre-emption signaling and PSCCH transmission respectively.
The V-UE in fig. 3 (a) transmits PSCCH and PSSCH corresponding to uplink transmission according to the acquired PUSCH partial resource occupied by the sidelink service transmission requirement, where PSCCH may be selected to be unscrambled to support the detection of SCI in PSCCH by both the base station and the receiving node of the V-UE corresponding sidelink, and PSSCH is scrambled with the corresponding sidelink transmission identifier (if any). Wherein, the SCI signaling carried by PSCCH contains resource position corresponding to the resource position occupied by the sidelink service.
The V-UE in fig. 3 (b) may occupy the acquired PUSCH partial resource to send a PUCCH bearer uplink pre-transmission signaling to the base station, and send the PSCCH and PSSCH that are occupied for the sidelink transmission to the sidelink receiving node, where the PSCCH and PSSCH are scrambled with the corresponding V-UE sidelink transmission identifier (if any). To support the base station to identify that a PSCCH or PUCCH (pre-transmission signaling) is reached in the PUSCH, one or more null symbols may be continuously transmitted on the PUSCH resource when the PSCCH or PUCCH is transmitted, so as to indicate that the uplink resource is occupied by other traffic, and a control signaling indication is sent.
The process flow when it is determined that there is an uplink traffic arrival is as follows:
for case 1, no uplink traffic transmission can be performed.
Determining whether the obtained uplink transmission resource meets the transmission of the arrived uplink service according to the condition 3, and if so, using the obtained uplink transmission resource for transmission; otherwise, uplink traffic transmission cannot be performed.
For case 4, determining whether the obtained uplink transmission resource satisfies the transmission of the arriving uplink service, if so, using the obtained uplink transmission resource for transmission; otherwise, determining that the resources for transmitting the uplink service are not obtained.
In the case where it is determined that the resources for transmitting the uplink traffic are not obtained enough in the case 2 (there are no available uplink transmission resources) and the case 4 (there are uplink transmission resources not satisfying the transmission of the arriving uplink traffic), the following processing is performed:
the first step, V-UE determines whether the service requirement parameter of the uplink service meets a second preset multiplexing condition when determining that the uplink service arrives and uplink resources which are enough for transmitting the uplink service are not obtained, and if yes, the second step is executed; otherwise, ending, namely not occupying the sidelink resource to transmit the uplink service.
The service requirement parameters include service priority, qos, etc., and the second preset multiplexing conditions are configured according to actual requirements, for example: the service priority is higher than the priority of the current sidelink transmission service, and if no current sidelink service is transmitted, the lowest priority of the current sidelink transmission service is determined; qos is greater than a preset quality of service, etc.
A second step of determining whether the stored sidelink resource multiplexing information is a dedicated resource which is obtained for the sidelink service and can be pre-occupied by the uplink service, and if so, executing a third step; otherwise, ending, namely not occupying the sidelink resource to transmit the uplink service.
Thirdly, determining whether the obtained dedicated resources for the sidelink service transmission meet the resource requirements of the arriving uplink service transmission, and if so, executing a fourth step; otherwise, ending, namely not occupying the sidelink resource to transmit the uplink service.
Determining whether the obtained dedicated resources for the sidelink service transmission meet the resource requirements of the arriving uplink service transmission, such as meeting the service transmission QoS index; the condition for specifically meeting the resource requirement of uplink traffic transmission can be set according to actual requirements.
If it is determined that the service requirement parameter of the uplink service meets a second preset multiplexing condition, the stored sidelink resource multiplexing information is that dedicated resources obtained for the sidelink service can be pre-occupied by the uplink service, and the obtained dedicated resources for the sidelink service transmission meet the resource requirement of the arriving uplink service transmission, and executing a fourth step; otherwise, ending, namely not occupying the sidelink resource to transmit the uplink service.
The fourth step, the V-UE uses the obtained resource for the transmission of the sidelink service to transmit the uplink service; and transmitting a sidelink pre-occupation signaling to inform the sidelink transmission that the corresponding receiving node is not provided with the sidelink data transmission at the position of the sidelink resource occupied by the uplink service.
And when the V-UE (corresponding to the sidelink transmission) serving as a receiving node receives the sidelink transmission notification of the V-UE serving as a sending node, and the position of the sidelink resource of the resource occupied by the uplink service is not transmitted by the sidelink data, the data at the corresponding resource position is not used as the sidelink data.
The V-UE may be sent after the uplink service is transmitted using the obtained resources for the transmission of the sidelink service, or may be sent before the uplink service is transmitted using the obtained resources for the transmission of the sidelink service, when sending the sidelink pre-occupation signaling, specifically implemented as follows:
the first specific implementation of signaling to send a sidelink preemption after transmitting the uplink traffic using the obtained resources for sidelink traffic transmission:
after the V-UE serving as a sending point uses the obtained resources for the uplink service transmission to transmit the uplink service, selecting a PSCCH scheduled by a next base station after uplink occupation of the uplink service transmission or sending a sidelink pre-occupation signaling on the PSCCH selected through distributed contention to inform the sidelink transmission that no sidelink data exists in the position of the resources occupied by the uplink service by the corresponding receiving node;
When receiving a sidelink pre-occupation signaling, V-UE (a receiving node corresponding to sidelink transmission) serving as a receiving point determines that detected data at a resource position indicated by the sidelink pre-occupation signaling is invalid;
referring to fig. 4, fig. 4 is a schematic diagram illustrating signaling for transmitting a sidelink preemption after transmitting the uplink traffic using the obtained resources for the sidelink traffic transmission.
In fig. 4, the V-UE transmits PUCCH and PUSCH corresponding to the uplink transmission according to the acquired PSSCH part resources occupied by the uplink transmission requirement, where the PUCCH and PUSCH are scrambled with corresponding UE-specific network identifiers. And the V-UE selects PSCCH scheduled by the next base station after uplink occupancy of the sidelink resources or sends a sidelink pre-emission signaling on the PSCCH selected through distributed contention to inform a receiving node corresponding to the sidelink that no sidelink data transmission exists in the detected corresponding occupied time-frequency resource position, wherein the resource position contained in the sidelink pre-emission signaling corresponds to the resource position occupied by uplink service.
The second specific implementation of signaling to send a sidelink preemption before transmitting the uplink traffic using the obtained resources for sidelink traffic transmission:
The V-UE as a sending point uses the obtained PSSCH part of the resources to send a PSCCH bearing sidelink pre-occupation signaling to the sidelink pair receiving node before using the obtained resources for the sidelink service transmission to transmit the uplink service; and transmitting the PUCCH and the PUSCH which are occupied by the sidelink for uplink transmission to the base station, wherein one or more null symbols are continuously transmitted on PSSCH resources of the sidelink when the PUCCH or the PSCCH is transmitted so as to indicate that the sidelink resources are occupied by uplink service, and transmitting a control signaling instruction.
When receiving a sidelink pre-occupation signaling, V-UE (a receiving node corresponding to sidelink transmission) serving as a receiving point does not detect data at a resource position indicated by the sidelink pre-occupation signaling or detects that the data is invalid; when the PSSCH detects one or more continuous null symbols, determining that the sidelink resource is occupied by uplink service, and sending out indication signaling.
Referring to fig. 5 (a), fig. 5 (a) is a schematic diagram of a sidelink pre-occupation signaling multiplexing PUCCH.
Referring to fig. 5 (b), fig. 5 (b) is a schematic diagram of the independent transmission of the sidelink pre-occupation signaling and the PUCCH.
In fig. 5 (a), the V-UE transmits PUCCH and PUSCH corresponding to uplink transmission according to the acquired PSSCH part resources occupied by the uplink transmission requirement, where the PUCCH may be selected to be unscrambled to support detection of UCI in the PUCCH by both the base station and the receiving node of the V-UE corresponding sidelink, and the PUSCH is scrambled with the corresponding UE-specific network identifier. Wherein the UCI signaling carried by the PUCCH contains the resource position corresponding to the resource position occupied by the uplink service by the sidelink
The V-UE in fig. 5 (b) may occupy the acquired PSSCH part resource to send a PSCCH bearer sidelink pre-transmission signaling to the receiving node of the sidelink, and send PUCCH and PUSCH occupied by the sidelink for uplink transmission to the base station, where the PUCCH and PUSCH are scrambled with corresponding UE-specific network identifiers. In order to support that the receiving node of the corresponding sidelink of the V-UE recognizes that a PUCCH or PSCCH (pre-transmission signaling) is reached in the PSSCH, one or more null symbols may be continuously transmitted on the PSSCH resource of the sidelink when the PUCCH or PSCCH is transmitted, so as to indicate that the sidelink resource is occupied by other services, and send out a control signaling indication.
Based on the same inventive concept, the embodiment of the application also provides a multiplexing method of the communication resources of the Internet of vehicles, which is applied to the V-UE of the vehicle terminal.
Referring to fig. 6, fig. 6 is a schematic diagram of an uplink resource multiplexing flow of internet of vehicles communication. The method comprises the following specific steps:
step 601, V-UE receives resource multiplexing information notified by a base station and stores the resource multiplexing information; wherein the resource multiplexing information includes: uplink resource multiplexing information.
When the base station informs the resource multiplexing information, the base station sends the resource multiplexing information through an RRC signaling informing the special PUSCH and PSSCH parameters, wherein fields for indicating the sidelink resource multiplexing information and the uplink resource multiplexing information are added in the RRC signaling and are respectively used for carrying the sidelink resource multiplexing information and the uplink resource multiplexing information.
In step 602, when it is determined that a communication link sidelink service arrives and sidelink resources sufficient to transmit the sidelink service are not obtained, if it is determined that a service requirement parameter of the sidelink service meets a first preset multiplexing condition, the stored uplink resource multiplexing information is that a dedicated resource obtained for uplink service can be pre-occupied by the sidelink service, and the obtained dedicated resource for uplink service transmission meets a resource requirement of the arriving sidelink service transmission, the obtained dedicated resource for uplink service is used to transmit the sidelink service.
And 603, the V-UE sends an uplink pre-occupation signaling to notify the base station that no uplink data is sent at the position of the uplink resource occupied by the sidelink service, so that the base station does not use the data at the position of the corresponding uplink resource as uplink data.
The implementation of step 603 is specifically as follows:
the first way is:
after the obtained dedicated resources for uplink service are used for transmitting the sidelink service, selecting a PUCCH scheduled by a next base station after the sidelink occupies the uplink resources to transmit an uplink pre-occupied signaling, informing the base station that no uplink data is transmitted at the position of the uplink resources occupied by the sidelink service, and enabling the base station to not use the data at the resource position indicated by the uplink pre-occupied signaling as uplink data;
The second way is:
before the obtained dedicated resources for uplink service are used for transmitting the sidelink service, occupying the obtained PUSCH part resources to send a PUCCH bearing uplink pre-occupation signaling to the base station, so that the base station does not detect data or invalidate detected data at the resource position indicated by the instruction when receiving the PUCCH bearing uplink pre-occupation signaling; and transmitting the PSCCH and PSSCH which are occupied by uplink and used for sidelink transmission to a sidelink receiving node, wherein one or more null symbols are continuously transmitted on a PUSCH resource when the PSCCH or the PUCCH is transmitted so as to indicate that the uplink resource is occupied by other services, and a control signaling instruction is transmitted, so that a base station determines that the uplink resource is occupied by the sidelink service when the PUSCH detects one or more continuous null symbols, and the instruction signaling is transmitted.
Referring to fig. 7, fig. 7 is a schematic diagram of a communication sidelink resource multiplexing flow of the internet of vehicles. The method comprises the following specific steps:
step 701, V-UE receives the resource multiplexing information notified by the base station and stores the information; wherein the resource multiplexing information includes: and the sidelink resource multiplexing information.
When the base station informs the resource multiplexing information, the base station sends the resource multiplexing information through an RRC signaling informing the special PUSCH and PSSCH parameters, wherein fields for indicating the sidelink resource multiplexing information and the uplink resource multiplexing information are added in the RRC signaling and are respectively used for carrying the sidelink resource multiplexing information and the uplink resource multiplexing information.
In step 702, when it is determined that an uplink service arrives and uplink resources sufficient for transmitting the uplink service are not obtained, if it is determined that the service requirement parameter of the uplink service meets a second preset multiplexing condition, the stored sidelink resource multiplexing information is that dedicated resources obtained for the sidelink service can be pre-occupied by the uplink service, and the obtained dedicated resources for the sidelink service transmission meet the resource requirement of the arriving uplink service transmission, and then the obtained resources for the sidelink service transmission are used for transmitting the uplink service.
And 703, the V-UE sends a sidelink pre-occupation signaling to notify the sidelink to transmit that no sidelink data exists at the position of the resource occupied by the uplink service by the corresponding receiving node, so that the receiving node will not use the data at the position of the corresponding resource as the sidelink data.
The specific implementation of step 703 is as follows:
the first way is:
after the obtained resources for uplink service transmission are used for transmitting the uplink service, selecting a PSCCH scheduled by a next base station after uplink occupied sidelink resources or transmitting a sidelink pre-occupied signaling on the PSCCH selected through distributed contention, informing a corresponding receiving node of the sidelink transmission that no sidelink data exists at the position of the resources occupied by the uplink service, and enabling the receiving node to determine that the detected data at the position of the resources indicated by the uplink pre-occupied signaling is invalid;
The second way is:
before the obtained resources for the uplink service transmission are used for transmitting the uplink service, occupying the obtained PSSCH part resources to send a PSCCH bearing sidelink pre-occupation signaling to the receiving node, so that the receiving node does not detect data or invalidate detected data at the resource position indicated by the instruction when receiving the sidelink pre-occupation signaling borne by a PUCCH; and transmitting the PUCCH and the PUSCH which are occupied by the sidelink for uplink transmission to the base station, wherein one or more null symbols are continuously transmitted on PSSCH resources of the sidelink when the PUCCH or the PSCCH is transmitted so as to indicate that the sidelink resources are occupied by uplink service, and sending out control signaling instructions, so that the receiving node determines that the sidelink resources are occupied by the uplink service when the PSSCH detects one or more continuous null symbols, and the control signaling is sent out.
In the embodiment of the application, aiming at the situation that the obtained uplink resource is insufficient for transmitting uplink service, and the uplink service can be transmitted by multiplexing the sidelink resource, the uplink service is transmitted by using the sidelink resource only; when the obtained sidelink resources are not enough to transmit uplink services and uplink resources can be multiplexed to transmit the sidelink services, only the uplink resources are used to transmit the sidelink services.
In addition, the embodiment of the application also provides a device for multiplexing the communication resources of the internet of vehicles, which is characterized by comprising a processor, wherein the processor is used for executing the steps of the multiplexing method of the communication resources of the internet of vehicles.
In addition, in an embodiment of the present application, there is further provided a non-transitory computer readable storage medium storing instructions, where the instructions, when executed by a processor, cause the processor to perform the steps of a method for multiplexing internet of vehicles communication resources.
In summary, the present application can preempt uplink resources for performing sidelink service transmission when the sidelink service of the V-UE reaches and uplink resource allocation has been obtained; or when the uplink service of the Internet of vehicles reaches and the sidelink transmission resource is obtained, the uplink service transmission can be performed by preempting the sidelink resource. The method can reduce the signaling overhead and the time delay of channel access under the condition of no transmission collision.
The foregoing description of the preferred embodiments of the invention is not intended to be limiting, but rather to enable any modification, equivalent replacement, improvement or the like to be made within the spirit and principles of the invention.

Claims (12)

1. A system for multiplexing internet of vehicles communication resources, the system comprising: a base station and a vehicle terminal V-UE;
the base station configures resource multiplexing information for the V-UE and informs the corresponding V-UE; wherein the resource multiplexing information includes: uplink resource multiplexing information; when the position of the uplink resource occupied by the communication link sidelink service notified by the V-UE is free of uplink data, the data at the corresponding resource position is not used as the uplink data;
V-UE as a transmitting node stores the resource multiplexing information notified by the base station when receiving the resource multiplexing information; when determining that a sidelink service arrives and a sidelink resource sufficient for transmitting the sidelink service is not obtained, if determining that a service requirement parameter of the sidelink service meets a first preset multiplexing condition, storing uplink resource multiplexing information that a special resource obtained for uplink service can be pre-occupied by the sidelink service and the obtained special resource for uplink service transmission meets a resource requirement of the arrived sidelink service transmission, and transmitting the sidelink service by using the obtained special resource for uplink service; and transmitting an uplink pre-occupation signaling to inform the base station that no uplink data is transmitted at the position of the uplink resource occupied by the sidelink service.
2. The system of claim 1, wherein the system further comprises a controller configured to control the controller,
the base station configures and informs the resource multiplexing information of the V-UE further comprises: the sidelink resource multiplexing information;
when it is determined that an uplink service arrives and uplink resources for transmitting the uplink service are not obtained, if it is determined that a service requirement parameter of the uplink service meets a second preset multiplexing condition, the stored sidelink resource multiplexing information is that dedicated resources obtained for the sidelink service can be pre-occupied by the uplink service, and the obtained dedicated resources for the sidelink service transmission meet the resource requirement of the arriving uplink service transmission, the obtained resources for the sidelink service transmission are used for transmitting the uplink service; and transmitting a sidelink pre-occupation signaling to inform a corresponding receiving node of the sidelink transmission that no sidelink data is transmitted at the position of the sidelink resource occupied by the uplink service;
and when the V-UE serving as a receiving node receives the transmitted sidelink of the V-UE serving as a transmitting node, and the position of the sidelink resource of the resource occupied by the uplink service by the corresponding receiving node is not provided with the sidelink data, the data at the corresponding resource position is not used as the sidelink data.
3. The system of claim 2, wherein the system further comprises a controller configured to control the controller,
and when the base station informs the resource multiplexing information, the base station sends the Radio Resource Control (RRC) signaling by informing the parameters of the special uplink service channel (PUSCH) and the physical through communication service channel (PSSCH), wherein fields for indicating the sidelink resource multiplexing information and the uplink resource multiplexing information are added in the RRC signaling and are respectively used for carrying the sidelink resource multiplexing information and the uplink resource multiplexing information.
4. A system according to any one of claims 1 to 3, wherein,
after transmitting the sidelink service by using the obtained dedicated resource for uplink service, the V-UE serving as a transmitting node selects a PUCCH scheduled by a next base station after the sidelink occupies the uplink resource to transmit an uplink pre-occupation signaling, and informs the base station that no uplink data is transmitted at the position of the resource occupied by the sidelink service;
when receiving the uplink pre-occupation signaling, the base station determines that the detected data at the resource position indicated by the uplink pre-occupation signaling is invalid;
or alternatively, the first and second heat exchangers may be,
the V-UE as a transmitting point transmits a PUCCH bearing uplink pre-occupation signaling to a base station by occupying part of the resources of the PUSCH of the obtained uplink shared channel before using the obtained dedicated resources for uplink service to transmit the sidelink service; transmitting PSCCH and PSSCH which are occupied by uplink for sidelink transmission to a sidelink receiving node, wherein one or more null symbols are continuously transmitted on a PUSCH resource when the PSCCH or PUCCH is transmitted so as to indicate that the uplink resource is occupied by other services, and transmitting a control signaling indication;
When receiving the uplink pre-occupation signaling, the base station does not detect data or does not have the uplink data invalid in the resource position indicated by the uplink pre-occupation signaling; and when the PUSCH detects one or more continuous empty symbols, determining that the uplink resource is occupied by the sidelink service, and sending out an indication signaling.
5. A system according to claim 2 or 3, wherein,
after the obtained resources for the uplink service transmission are used for transmitting the uplink service, selecting a PSCCH scheduled by a next base station after uplink occupation of the uplink service transmission or transmitting a sidelink pre-occupation signaling on the PSCCH selected through distributed competition, and informing the sidelink transmission that no sidelink data exists in the position of the resources occupied by the uplink service by the corresponding receiving node;
V-UE as receiving node, when receiving the sidelink pre-occupation signaling, determining that the detected data at the resource position indicated by the sidelink pre-occupation signaling is invalid;
or alternatively, the first and second heat exchangers may be,
V-UE as a transmitting node, before using the obtained resources for the sidelink service transmission to transmit the uplink service, occupying the obtained PSSCH part resources of the physical direct communication data channel to transmit a PSCCH bearing sidelink pre-occupation signaling to the receiving node; and transmitting the PUCCH and the PUSCH which are occupied by the sidelink for uplink transmission to the base station, wherein one or more null symbols are continuously transmitted on PSSCH resources of the sidelink when the PUCCH or the PSCCH is transmitted so as to indicate that the sidelink resources are occupied by uplink service, and transmitting a control signaling instruction;
V-UE as receiving node, when receiving the sidelink pre-occupation signaling, does not detect data or detect data invalidation at the resource position indicated by the sidelink pre-occupation signaling; when the PSSCH detects one or more continuous null symbols, determining that the sidelink resource is occupied by uplink service, and sending out indication signaling.
6. The method for multiplexing the communication resources of the Internet of vehicles is applied to a vehicle terminal V-UE and is characterized by comprising the following steps:
receiving and storing resource multiplexing information notified by a base station; wherein the resource multiplexing information includes: uplink resource multiplexing information;
when determining that a communication link sidelink service arrives and sidelink resources sufficient for transmitting the sidelink service are not obtained, if determining that the service requirement parameter of the sidelink service meets a first preset multiplexing condition, storing uplink resource multiplexing information which is a special resource obtained for uplink service can be pre-occupied by the sidelink service, and the obtained special resource for uplink service transmission meets the resource requirement of the arrived sidelink service transmission, and transmitting the sidelink service by using the obtained special resource for uplink service;
And sending an uplink pre-occupation signaling to inform the base station that the position of the resource occupied by the sidelink service has no uplink data, so that the base station does not use the data on the corresponding resource position as uplink data.
7. The method according to claim 6, wherein the method further comprises:
the resource multiplexing information further includes: the sidelink resource multiplexing information;
when it is determined that uplink traffic arrives and uplink resources sufficient for transmitting the uplink traffic are not obtained, if it is determined that the service requirement parameter of the uplink traffic meets a second preset multiplexing condition, the stored sidelink resource multiplexing information is that dedicated resources obtained for the sidelink service can be pre-occupied by the uplink traffic, and the obtained dedicated resources for the sidelink service transmission meet the resource requirement of the arriving uplink traffic, the obtained resources for the sidelink service transmission are used for transmitting the uplink traffic;
and sending a sidelink pre-occupation signaling to inform the sidelink to transmit the non-sidelink data of the position of the corresponding receiving node occupied by the uplink service resource, so that the receiving node does not use the data on the corresponding resource position as the sidelink data.
8. The method of claim 7, wherein the step of determining the position of the probe is performed,
when the base station informs the resource multiplexing information, the base station sends the Radio Resource Control (RRC) signaling by informing the parameters of a special uplink service channel (PUSCH) and a physical through communication service channel (PSSCH), wherein fields for indicating the sidelink resource multiplexing information and the uplink resource multiplexing information are added in the RRC signaling and are respectively used for carrying the sidelink resource multiplexing information and the uplink resource multiplexing information.
9. The method according to any one of claims 6-8, wherein the sending uplink pre-emption signaling to notify the base station that the location of the resource occupied by the sidelink service has no uplink data, so that the base station will not use the data at the corresponding resource location as uplink data includes:
after the obtained dedicated resources for uplink service are used for transmitting the sidelink service, selecting a PUCCH scheduled by a next base station after the sidelink occupies uplink resources to transmit an uplink pre-occupied signaling, informing the base station that no uplink data exists at the position of the resources occupied by the sidelink service, and enabling the base station to determine that the detected data at the position of the resources indicated by the uplink pre-occupied signaling is invalid;
Or before the obtained dedicated resources for uplink service are used for transmitting the sidelink service, occupying the obtained PUSCH part resources to send a PUCCH bearing uplink pre-occupation signaling to the base station, so that the base station does not perform data detection or detect data invalidation at the resource position indicated by the uplink pre-occupation signaling when receiving the PUCCH bearing uplink pre-occupation signaling; and transmitting the PSCCH and PSSCH which are occupied by uplink and used for sidelink transmission to a sidelink receiving node, wherein one or more null symbols are continuously transmitted on a PUSCH resource when the PSCCH or the PUCCH is transmitted so as to indicate that the uplink resource is occupied by other services, and a control signaling instruction is transmitted, so that a base station determines that the uplink resource is occupied by the sidelink service when the PUSCH detects one or more continuous null symbols, and the instruction signaling is transmitted.
10. The method according to claim 7 or 8, wherein the sending a sidelink preemption signaling to notify a sidelink that a corresponding receiving node transmits no received data at a location of a resource occupied by the uplink service, so that the receiving node does not receive data at the corresponding resource location, includes:
After the obtained resources for uplink service transmission are used for transmitting the uplink service, selecting a PSCCH scheduled by a next base station after uplink occupied sidelink resources or transmitting a sidelink pre-occupied signaling on the PSCCH selected through distributed contention, informing a corresponding receiving node of the sidelink transmission that no sidelink data exists at the position of the resources occupied by the uplink service, and enabling the receiving node to determine that the detected data at the position of the resources indicated by the uplink pre-occupied signaling is invalid;
or before the obtained resources for the uplink service transmission are used for transmitting the uplink service, occupying the obtained PSSCH part of the resources to send a PSCCH bearing sidelink pre-occupation signaling to the receiving node of the sidelink pair, so that the receiving node does not detect data or invalidate detected data at the resource position indicated by the sidelink pre-occupation signaling when receiving the sidelink pre-occupation signaling borne by a PUCCH; and transmitting the PUCCH and the PUSCH which are occupied by the sidelink for uplink transmission to the base station, wherein one or more null symbols are continuously transmitted on PSSCH resources of the sidelink when the PUCCH or the PSCCH is transmitted so as to indicate that the sidelink resources are occupied by uplink service, and sending out control signaling instructions, so that the receiving node determines that the sidelink resources are occupied by the uplink service when the PSSCH detects one or more continuous null symbols, and the control signaling is sent out.
11. An internet of vehicles communication resource multiplexing device, characterized in that the device comprises a processor for performing the steps of the method according to claims 6-10.
12. A non-transitory computer readable storage medium storing instructions which, when executed by a processor, cause the processor to perform the steps of the method as recited in claims 6-10.
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