CN111510872B - Method, device and system for notifying pre-occupation of communication channel of Internet of vehicles - Google Patents

Method, device and system for notifying pre-occupation of communication channel of Internet of vehicles Download PDF

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CN111510872B
CN111510872B CN201910025415.7A CN201910025415A CN111510872B CN 111510872 B CN111510872 B CN 111510872B CN 201910025415 A CN201910025415 A CN 201910025415A CN 111510872 B CN111510872 B CN 111510872B
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terminal
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resources
direct link
signaling
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CN111510872A (en
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沈霞
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China Academy of Information and Communications Technology CAICT
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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/20Services signaling; Auxiliary data signalling, i.e. transmitting data via a non-traffic channel
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/16Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/26Resource reservation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W4/00Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/30Services specially adapted for particular environments, situations or purposes
    • H04W4/40Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P]
    • H04W4/46Services specially adapted for particular environments, situations or purposes for vehicles, e.g. vehicle-to-pedestrians [V2P] for vehicle-to-vehicle communication [V2V]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W76/00Connection management
    • H04W76/20Manipulation of established connections
    • H04W76/23Manipulation of direct-mode connections

Abstract

The application provides a method for notifying pre-occupation of a communication channel of Internet of vehicles, which comprises the following steps: when a first terminal determines that a sidelink service arrives with a third terminal, if the first terminal determines that resources on a first straight-through link are occupied to transmit the sidelink service, a pre-occupation signaling is sent to a second terminal, so that the second terminal does not perform data detection at the resource position occupied by a second straight-through link on the first straight-through link, or the detected data is determined to be invalid; wherein, the pre-occupation signaling comprises: a second terminal identifier and a resource position occupied by a second direct link in the resources of the first direct link; the first direct link is a link between the first terminal and the second terminal, and the second direct link is a link between the first terminal and the third terminal. The method can save resource request signaling and reduce the time delay of the service access channel.

Description

Method, device and system for notifying pre-occupation of communication channel of Internet of vehicles
Technical Field
The invention relates to the technical field of communication, in particular to a method, a device and a system for notifying pre-occupation of a communication channel of a vehicle networking.
Background
The internet of vehicles (V2X) introduces a communication link (sidelink) between vehicle terminals (V-UEs) to support direct communication between the vehicle V-UEs, in contrast to conventional cellular communication.
In the sidelink communication of the 5G NR V-UE, the resource allocation of the sidelink supports two modes of base station scheduling and distributed interception selection, wherein the base station scheduling is mainly used in a scene with base station coverage, and the distributed interception selection can be used in the scene with base station coverage or in the scene without base station coverage.
When there is no coverage of the base station, the sidelink communication can only acquire channel resources by means of distributed listening selection or channel resources pre-allocated by the base station before moving out of the coverage of the base station.
In summary, distributed sensing selection will be a very important channel resource acquisition mode in sidelink. The main characteristic of distributed interception selection is that the V-UE selects an idle channel for access by adopting the occupation state of an interception channel before resource selection. The interception includes decoding detection of received control Signaling (SCI) indicating sidelink resource allocation, energy detection of channel occupation, and the like, so as to judge the channel occupation state.
In 5G NR V2X communication, diverse performance requirements of different applications will be met, as shown in table 1, which is the content contained in the 5G NR V2X application performance index requirements. The method specifically comprises the following steps:
Figure BDA0001942297850000021
TABLE 1
When a high priority service arrives, distributed interception selection is adopted, and then the probability that the intercepted idle channel resources are insufficient to meet the QoS requirement of the current service or resource conflict occurs, and the channel of the low priority service needs to be occupied to quickly send the high priority service.
For example, when a source node (first terminal) and a destination node 1 (second terminal) have obtained sidelink transmission resources, and a source node and a destination node 2 (third terminal) have new traffic arriving, and the priority of the new traffic is higher than the transmission priority of the first terminal and the second terminal, and the first terminal has no resource capable of meeting its QoS requirement through channel sensing, the resource between the first terminal and the second terminal can be directly used for communication with the third terminal, so as to meet the traffic transmission requirement of the third terminal.
The existing related technology is a method for pre-occupying (multiplexing) eMBB service channel resources by URLLC service between different uplink UEs in NR cellular communication. Specifically, the URLLC UE sends a service request to the base station, the base station sends a resource pre-occupation (pre-occupation) signaling indication to the eMBB UE through the PDCCH, indicates that data transmitted on the allocated part of the eMBB resources is occupied by other services, and indicates the part of the resources for its service transmission to the URLLC UE. Therefore, the resource allocated to the eMBB UE is quickly allocated to the URLLC UE for use through central scheduling of the base station.
Disclosure of Invention
In view of this, the present application provides a vehicle networking communication channel pre-occupation notification, device and system, which can save resource request signaling and reduce service access channel delay.
In order to solve the technical problem, the technical scheme of the application is realized as follows:
a vehicle networking communication channel preemption notification method, the method comprising:
when a first terminal determines that a sidelink service arrives with a third terminal, if the first terminal determines that resources on a first straight-through link are occupied to transmit the sidelink service, a pre-occupation signaling is sent to a second terminal, so that the second terminal does not perform data detection at the resource position occupied by a second straight-through link on the first straight-through link, or the detected data is determined to be invalid;
wherein, the pre-occupation signaling comprises: a second terminal identifier and a resource position occupied by a second direct link in the resources of the first direct link; the first direct link is a link between the first terminal and the second terminal, and the second direct link is a link between the first terminal and the third terminal.
A vehicle networking communication channel pre-occupancy notification system, the system comprising: a first terminal and a second terminal;
the first terminal, when confirming that there is a sidelink service arriving with the third terminal, if confirming that the resource on the first direct link is occupied to transmit the sidelink service, then sending a pre-occupation signaling to the second terminal; wherein, the pre-occupation signaling comprises: a second terminal identifier and a resource position occupied by a second direct link in the resources of the first direct link; the first direct link is a link between the first terminal and the second terminal, and the second direct link is a link between the first terminal and the third terminal;
and the second terminal does not perform data detection or determines that the detected data is invalid at the resource position occupied by the second through link on the first through link when receiving the pre-occupation signaling sent by the first terminal.
An internet of vehicles communication channel preemption notification apparatus, the apparatus comprising a processor configured to perform the steps of an internet of vehicles communication channel preemption notification 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 vehicle networking communication channel preemption notification method.
According to the above technical solution, the first terminal is set to send the pre-occupation signaling to indicate the second terminal, and the obtained sidelink resource between the first terminal and the second terminal is utilized by the sidelink resource between the first terminal and the third terminal, so that the resource request signaling can be saved, and the service access channel delay can be reduced.
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FIG. 1 is a schematic diagram of a vehicle networking communication channel preemption notification system in an embodiment of the present application;
fig. 2 is a schematic diagram of a pre-occupancy notification process of a communication channel of the internet of vehicles in the embodiment of the present application.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more clearly apparent, the technical solutions of the present invention are described in detail below with reference to the accompanying drawings and examples.
The embodiment of the application provides a vehicle networking communication channel pre-occupation notification system. Referring to fig. 1, fig. 1 is a schematic diagram of a vehicle networking communication channel preemption notification system in an embodiment of the present application. The system comprises: the system comprises a first terminal, a second terminal, a third terminal and a base station;
a first terminal acquires resources of a first direct link; the first direct link is a link between a first terminal and a second terminal;
the specific implementation manner of the first terminal acquiring the resource of the first direct link may be as follows, but is not limited to the following implementation manners:
the first method comprises the following steps:
a first terminal selects and obtains resources of a first direct link through channel sensing resources;
and the first terminal receives and acquires the resources of the first direct link distributed by the base station.
The occupied position of the resource of the first direct link is sent to other terminals in the period through SCI signaling so as to assist the other terminals to select the resource of sidelink communication and avoid resource conflict.
And the first terminal sends a pre-occupation signaling to the second terminal if determining that the resources on the first direct link are occupied to transmit the sidelink service when determining that the sidelink service arrives with the third terminal.
Wherein, the pre-occupation signaling comprises: a second terminal identifier and a resource position occupied by a second direct link in the resources of the first direct link; the second direct link is a link between the first terminal and the third terminal.
The first terminal, specifically configured to determine that resources on a first direct link are occupied to transmit the sidelink service, includes: and if the resources of the second straight-through link are determined not to meet the requirement of the transmission of the sidelink service and the resources of the first straight-through link meet the requirement of the transmission of the sidelink service, determining that the resources on the first straight-through link are occupied for transmitting the sidelink service.
And when determining that the resources of the second straight-through link meet the transmission of the sidelink service, directly using the resources of the second straight-through link to transmit the sidelink service.
When the resource of the second direct link does not satisfy the transmission of the sidelink service, it indicates that sufficient transmission resource has not been acquired, and possibly the acquired transmission resource cannot satisfy the transmission of the sidelink service.
And when determining that the resources of the first direct link do not meet the requirement of the transmission of the sidelink service, not using the resources on the first direct link to transmit the sidelink service.
Determining whether the resource of the first direct link satisfies the transmission of the sidelink service may be implemented according to an existing implementation manner, which gives the following exemplary implementation manners, but is not limited to the following implementation manners:
the priority of the sidelink service is higher than that of the service transmitted on the first direct link, and when the first direct link meets the resources required by the Qos of the sidelink service, the resources of the first direct link are determined to meet the transmission of the sidelink service; otherwise, determining that the resources of the first direct link do not meet the transmission of the sidelink service.
In the embodiment of the application, the base station notifies activation configuration information that resources of the first direct link can be preempted or deactivation configuration information that the resources of the first direct link cannot be preempted through RRC signaling, and stores the activation configuration information and the deactivation configuration information;
if the configuration information is activated, the corresponding terminal can occupy resources of other straight-through links to perform service transmission when the corresponding straight-through link cannot transmit the arrived service;
if the configuration information is deactivated, the corresponding terminal is identified, and when the corresponding straight-through link cannot transmit the arrived service, the corresponding terminal cannot occupy the resources of other straight-through links to transmit the service.
If the activation configuration information is not received, and the deactivation configuration information is not received, whether the resource supporting the first direct link may be occupied or not may be defaulted according to specific settings, which is not limited herein.
Therefore, when determining that the resource of the second direct link does not satisfy the transmission of the sidelink service, further performing the following judgment:
determining whether the stored configuration information is activation configuration information, if so, the resources of the first direct link meet the transmission of the sidelink service; otherwise, determining not to occupy the resource on the first direct link to transmit the sidelink service.
The first terminal may send the pre-occupation signaling in the following two ways:
the first method comprises the following steps:
newly adding an SCI signaling to realize the pre-occupation signaling;
when the method is implemented, the second terminal identifier needs to be carried in the newly added SCI signaling, and the resource position occupied by the second direct link in the resources of the first direct link.
And the second method comprises the following steps:
the SCI signaling indicating the transmission resource location of the Physical direct communication channel (psch) and the detection implements the pre-occupied signaling, that is, the pre-occupied signaling is multiplexed with the SCI signaling indicating the transmission resource location of the psch.
In this implementation manner, the SCI signaling includes a second terminal identifier and a third terminal identifier to indicate that the second terminal includes resource location information of occupied first direct link communication resources in the signaling, and to indicate that the third terminal includes resource location information of second direct link communication resources in the signaling, where the resource location information is the same information.
And the second terminal does not perform data detection or determines that the detected data is invalid at the resource position occupied by the second through link on the first through link when receiving the pre-occupation signaling sent by the first terminal.
When the second terminal and the third terminal are the same terminal, the pre-occupation signaling is the SCH signaling indicating the PSSCH transmission resource position and the detected SCI, namely the pre-occupation signaling is sent by using the second mode.
And the second terminal, namely the third terminal, detects the sidelink service at the resource position occupied by the second direct link on the first direct link when receiving the pre-occupation signaling sent by the first terminal.
In specific implementation, different services are transmitted on the first direct link and the second direct link, and if the opposite end of the first terminal is the same terminal, different services can be distinguished through different links.
When the second terminal and the third terminal are not the same terminal, that is, the third terminal is a terminal other than the second terminal, and may be one (unicast) terminal or a plurality of terminals (multicast), the camping signaling may be sent to the second terminal by using the first or second manner.
Based on the same inventive concept, the embodiment of the application also provides a vehicle networking communication channel pre-occupation notification method. Referring to fig. 2, fig. 2 is a schematic diagram of a pre-occupancy notification process of a communication channel of the internet of vehicles according to an embodiment of the present application. The method comprises the following specific steps:
step 201, the first terminal determines that a sidelink service arrives with the third terminal.
Step 202, if the first terminal determines to occupy the resource on the first direct link to transmit the sidelink service, the first terminal sends a pre-occupation signaling to the second terminal, so that the second terminal does not perform data detection on the resource position occupied by the second direct link on the first direct link, or determines that the detected data is invalid.
Wherein the pre-occupation signaling at least comprises: a second terminal identifier and a resource position occupied by a second direct link in the resources of the first direct link; the first direct link is a link between the first terminal and the second terminal, and the second direct link is a link between the first terminal and the third terminal;
the pre-occupation signaling is a newly-added SCI signaling;
or the like, or, alternatively,
the pre-occupation signaling is SCH transmission resource position indication and SCI signaling of detection.
Further, the determining, by the first terminal, that the sidelink service is transmitted by occupying a resource on the first direct link specifically includes:
and if the resources of the second straight-through link are determined not to meet the requirement of the transmission of the sidelink service and the resources of the first straight-through link meet the requirement of the transmission of the sidelink service, determining that the resources on the first straight-through link are occupied for transmitting the sidelink service.
Further, the acquiring, by the first terminal, the resource of the first direct link specifically includes:
a first terminal selects and obtains resources of a first direct link through channel sensing resources;
or, receiving the resource of the first direct link allocated by the base station and acquiring the resource.
Further, the air conditioner is provided with a fan,
the first terminal receives and stores activation configuration information which is notified by a base station through Radio Resource Control (RRC) signaling and is about that resources of the first direct link can be preempted or deactivation configuration information which is about that the resources of the first direct link can not be preempted;
when it is determined that the resource of the second direct link does not satisfy the transmission of the sidelink service, the method further includes:
determining whether the stored configuration information is activation configuration information, and if so, determining whether the resources of the first direct link meet the transmission of the sidelink service; otherwise, determining not to occupy the resource on the first direct link to transmit the sidelink service.
Further, the air conditioner is provided with a fan,
when the second terminal and the third terminal are the same terminal, the pre-occupation signaling indicates the PSSCH resource transmission position and the detected SCI signaling;
and when the first terminal sends a pre-occupation signaling to the second terminal, the second terminal detects the sidelink service at the resource position occupied by the second direct link on the first direct link.
In addition, the embodiment of the application also provides a device for notifying the pre-occupation of the communication channel of the Internet of vehicles, which comprises a processor, wherein the processor is used for executing the steps of the method for notifying the pre-occupation of the communication channel of the Internet of vehicles.
Further, a non-transitory computer readable storage medium storing instructions that, when executed by a processor, cause the processor to perform the steps of the vehicle networking communication channel preemption notification method is also provided in embodiments herein.
To sum up, the present application sets the first terminal to send the pre-occupation signaling to indicate the second terminal, where the acquired sidelink resource between the first terminal and the second terminal is utilized by the sidelink between the first terminal and the third terminal, where the pre-occupation signaling may be multiplexed with the SCI signaling indicating PSSCH transmission between the first terminal and the third terminal. The scheme can save resource request signaling and reduce the time delay of the service access channel.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (12)

1. A vehicle networking communication channel preemption notification method, comprising:
when a first terminal determines that a sidelink service arrives between the first terminal and a third terminal, if the first terminal determines that resources on a first straight-through link are occupied to transmit the sidelink service, a pre-occupation signaling is sent to a second terminal, so that the second terminal does not perform data detection at the resource position occupied by a second straight-through link on the first straight-through link, or the detected data are determined to be invalid;
wherein, the pre-occupation signaling comprises: a second terminal identifier and a resource position occupied by a second direct link in the resources of the first direct link; the first direct link is a link between the first terminal and the second terminal, and the second direct link is a link between the first terminal and the third terminal.
2. The method of claim 1, wherein the determining to occupy resources on a first direct link for transmitting the sidelink service comprises:
and if the resources of the second straight-through link are determined not to meet the requirement of the transmission of the sidelink service and the resources of the first straight-through link meet the requirement of the transmission of the sidelink service, determining that the resources on the first straight-through link are occupied for transmitting the sidelink service.
3. The method of claim 2, further comprising:
the first terminal receives and stores activation configuration information which is notified by a base station through Radio Resource Control (RRC) signaling and is about that resources of the first direct link can be preempted or deactivation configuration information which is about that the resources of the first direct link can not be preempted;
when it is determined that the resource of the second direct link does not satisfy the transmission of the sidelink service, the method further includes:
determining whether the stored configuration information is activation configuration information, and if so, determining whether the resources of the first direct link meet the transmission of the sidelink service; otherwise, determining not to occupy the resource on the first direct link to transmit the sidelink service.
4. The method according to any one of claims 1 to 3,
the pre-occupation signaling is a newly added direct communication control indication (SCI) signaling;
or the like, or, alternatively,
the pre-occupation signaling is SCI signaling indicating the transmission resource position and detection of the physical direct communication data channel PSSCH.
5. The method of claim 4,
when the second terminal and the third terminal are the same terminal, the pre-occupation signaling is SCI signaling indicating the PSSCH transmission resource position;
and when the first terminal sends a pre-occupation signaling to the second terminal, the second terminal detects the sidelink service at the resource position occupied by the second direct link on the first direct link.
6. A vehicle networking communication channel preemption notification system, comprising: a first terminal and a second terminal;
the first terminal sends a pre-occupation signaling to the second terminal if determining that resources on the first direct link are occupied to transmit the sidelink service when determining that the sidelink service arrives between the first terminal and the third terminal; wherein, the pre-occupation signaling comprises: a second terminal identifier and a resource position occupied by a second direct link in the resources of the first direct link; the first direct link is a link between the first terminal and the second terminal, and the second direct link is a link between the first terminal and the third terminal;
and the second terminal does not perform data detection or determines that the detected data is invalid at the resource position occupied by the second through link on the first through link when receiving the pre-occupation signaling sent by the first terminal.
7. The system of claim 6,
the first terminal, specifically configured to determine that resources on a first direct link are occupied to transmit the sidelink service, includes: and if the resources of the second straight-through link are determined not to meet the requirement of the transmission of the sidelink service and the resources of the first straight-through link meet the requirement of the transmission of the sidelink service, determining that the resources on the first straight-through link are occupied for transmitting the sidelink service.
8. The system of claim 7,
a first terminal receiving and storing activation configuration information that a base station notifies through Radio Resource Control (RRC) signaling that resources of a first direct link can be preempted or deactivation configuration information that the resources of the first direct link cannot be preempted; when determining that the resources of the second direct link do not meet the transmission of the sidelink service, further determining whether the stored configuration information is the activated configuration information, and if so, determining whether the resources of the first direct link meet the transmission of the sidelink service; otherwise, determining not to occupy the resource on the first direct link to transmit the sidelink service.
9. The system according to any one of claims 6 to 8,
the pre-occupation signaling is a newly added direct communication control indication (SCI) signaling;
or the like, or, alternatively,
the pre-occupation signaling is SCI signaling indicating the transmission resource position and detection of the physical direct communication data channel PSSCH.
10. The system of claim 9,
the second terminal detects the sidelink service on the resource position occupied by the second straight-through link on the first straight-through link when receiving the pre-occupation signaling sent by the first terminal; and when the second terminal and the third terminal are the same terminal, the pre-occupation signaling indicates the PSSCH transmission resource position and the detected SCI signaling.
11. An internet of vehicles communication channel preemption notification apparatus, comprising a processor configured to perform the steps of the method of claims 1-5.
12. A non-transitory computer readable storage medium storing instructions that, when executed by a processor, cause the processor to perform the steps of the method as recited in claims 1-5.
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