CN110972290A - Resource allocation method for terminal direct communication - Google Patents
Resource allocation method for terminal direct communication Download PDFInfo
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- CN110972290A CN110972290A CN201811145970.5A CN201811145970A CN110972290A CN 110972290 A CN110972290 A CN 110972290A CN 201811145970 A CN201811145970 A CN 201811145970A CN 110972290 A CN110972290 A CN 110972290A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0055—Physical resource allocation for ACK/NACK
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/56—Allocation or scheduling criteria for wireless resources based on priority criteria
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
Abstract
The method identifies whether the allocated resources collide or not through resource allocation cooperation of a target terminal and/or resource allocation cooperation of surrounding nodes of a target receiving end, preferentially ensures transmission of high-priority services aiming at collision conditions, and can reduce data transmission failure rate caused by resource selection collision.
Description
Technical Field
The invention relates to the technical field of communication, in particular to a resource allocation method for terminal direct communication.
Background
The D2D (Device to Device) technology refers to the technology of Wi-Fi, Bluetooth and LTE-D2D, which are used for realizing direct communication between terminal devices. In the conventional communication system, communication between devices is controlled by a base station of a wireless communication carrier, and voice or data communication cannot be directly performed. This is because the capabilities of the terminal communication device and the channel resources for wireless communication are limited.
In the future 5G system, users are in a distributed network consisting of D2D communication users, each user node can send and receive signals and has the function of automatic routing (message forwarding). Participants of the network share a portion of the hardware resources they own, including information processing, storage, and network connectivity capabilities. These shared resources provide services and resources to the network that can be accessed directly by other users without going through intermediate entities.
For distributed resource allocation of terminal direct communication, the existing 3GPP defines a resource allocation manner based on interception, that is, a terminal direct transmission sending end first intercepts a channel occupation situation, randomly selects resources in 20% of available resources within a time window [ T1, T2] based on an interception result to perform data transmission, and informs a receiving end of information required for detecting data, including a resource location, MCS, and the like, through SCI (sidelink control information).
In this resource allocation manner, when available channel resources intercepted by the transmitting ends of the two terminal through links are similar, if the corresponding receiving ends are both within the coverage areas of the two transmitting ends, transmission collision may occur at the receiving ends, that is, the transmitting ends select the same channel resources. When the time window T1, T2 is small and the transmission packet is large, a resource selection collision is caused with a high probability.
Disclosure of Invention
In view of this, the present application provides a resource allocation method for terminal direct communication, which can reduce a data failure rate caused by resource selection collision.
In order to solve the technical problem, the technical scheme of the application is realized as follows:
a resource allocation method for terminal direct communication is applied to any node in a terminal direct communication network, and comprises the following steps:
the node is used as a sending end, and after resources for sending data are distributed, the node sends secondary link control information (SCI) carrying a Receiving Cooperation Indication (RCI); the RCI instructs a target receiving end to perform resource allocation cooperation; waiting for a first preset time, and retransmitting the SCI aiming at the situation that the SCI does not receive feedback and forwarding information within the first preset time; receiving the SCI forwarded by a target receiving end, and performing data transmission by using the resource indicated by the SCI; when receiving the conflict information fed back by the target receiving end, re-distributing the resources;
the node serves as a receiving end, and when the SCI of which the target receiving end is the node is received, whether the resource indicated by the SCI received in the second preset time conflicts or not is determined: forwarding the SCI for SCI whose indicated resource allocation is not conflicted; aiming at SCI with conflict in the indicated resource allocation, the corresponding SCI is indicated to directly feed back confirmation information to the corresponding sending end of the terminal with the highest priority; and feeding back the conflict information to other sending ends.
A resource allocation method for terminal direct communication is applied to any node in a terminal direct communication network, and comprises the following steps:
any node is used as a sending end, and after resources for sending data are distributed, SCI carrying RCI and NCI is sent; the RCI instructs a target receiving end to perform resource allocation cooperation; the NCI is used for indicating surrounding nodes of a target receiving end to perform resource allocation cooperation;
the node serves as a receiving end, and when the SCI of which the target receiving end is the node is received, whether the resource indicated by the SCI received in the second preset time conflicts or not is determined: forwarding the SCI for SCI whose indicated resource allocation is not conflicted; aiming at SCI with conflict in the indicated resource allocation, the corresponding SCI is indicated to directly feed back confirmation information to the corresponding sending end of the terminal with the highest priority; feeding back conflict information to other sending ends;
the node is used as any peripheral node of the target receiving end, and whether the resource indicated by the SCI aiming at the same target receiving end received in the second preset time conflicts or not is determined: feeding back confirmation information or not sending the confirmation information to the sending end of the corresponding SCI aiming at the SCI of which the indicated resource allocation does not conflict; aiming at SCI with conflict in the indicated resource allocation, the corresponding SCI is indicated to directly feed back confirmation information to the corresponding sending end of the terminal with the highest priority; feeding back conflict information to other sending ends;
the node serves as a sending end, waits for a first preset time after sending SCI carrying RCI and NCI, and resends the SCI in the first preset time aiming at the situation that the SCI does not receive feedback and forwarding information; receiving the SCI forwarded by a target receiving end, and performing data transmission by using the resource indicated by the SCI; and when receiving the conflict information fed back by the target receiving end, re-distributing the resources.
A resource allocation method for terminal direct communication is applied to any node in a terminal direct communication network, and comprises the following steps:
the node is used as a sending end, and after resources for sending data are distributed, the node sends sidelink control information SCI carrying neighbor cooperation indication NCI, wherein the NCI is used for indicating surrounding nodes of a target receiving end to carry out resource distribution cooperation; waiting for a first preset time, determining whether conflict information fed back by aiming at the SCI is received within the first preset time, and if so, re-allocating resources; otherwise, using the resource indicated by the SCI to transmit data;
the node is used as any peripheral node of the target receiving end, and whether the resource indicated by the SCI aiming at the same target receiving end received in the second preset time conflicts or not is determined: feeding back confirmation information or not sending the confirmation information to the sending end of the corresponding SCI aiming at the SCI of which the indicated resource allocation does not conflict; aiming at SCI with conflict in the indicated resource allocation, the corresponding SCI is indicated to directly feed back confirmation information to the corresponding sending end of the terminal with the highest priority; and feeding back the conflict information to other sending ends.
According to the technical scheme, whether the allocated resources are collided or not is identified through resource allocation cooperation of the target terminal and/or resource allocation cooperation of surrounding nodes of the target receiving end, transmission of high-priority services is preferentially guaranteed aiming at collision conditions, and the data transmission failure rate caused by resource selection collision can be reduced.
Drawings
Fig. 1 is a schematic view of a resource allocation procedure of terminal direct communication according to an embodiment of the present application;
FIG. 2 is a diagram illustrating a feedback format for SCI in an embodiment of the present application;
fig. 3 is a schematic view of a resource allocation process of terminal direct communication according to a second embodiment of the present application;
fig. 4 is a schematic view of a resource allocation procedure of terminal direct communication in the third 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 resource allocation method for terminal direct communication provided in the embodiment of the present application is applied to any node in a terminal direct communication network, and any node may have three roles: the sending end, the target receiving end and the peripheral nodes of the receiving end identify whether the distributed resources are collided or not through the resource distribution cooperation of the target terminal and/or the resource distribution cooperation of the peripheral nodes of the target receiving end, the transmission of high-priority services is preferentially ensured aiming at the collision condition, and the data transmission failure rate caused by resource selection collision can be reduced.
Two types of resource allocation cooperation modes are provided in the embodiment of the application: one type is used as a target receiving end to carry out resource allocation cooperation; one type is used as the peripheral nodes of the target receiving end to carry out resource allocation cooperation;
in the embodiment of the present application, in a specific implementation, a target receiving end performs resource allocation cooperation and performs resource allocation cooperation with surrounding nodes of the target receiving end, so that the present application provides three resource allocation cooperation modes, and each resource allocation cooperation mode is described in detail through three embodiments:
example one
A way to perform resource allocation coordination only by the destination receiver.
Referring to fig. 1, fig. 1 is a schematic view of a resource allocation process of terminal direct communication according to an embodiment of the present application. The method comprises the following specific steps:
In this step, if no feedback and forwarding information is received, i.e. no information is received, it is determined that the SCI transmission is incorrect or the SCI is incorrect, and retransmission is performed.
When receiving conflict information fed back by a target receiving end, the conflict information indicates that resources indicated by the SCI conflict, and at the moment, the resources need to be reselected;
and receiving the forwarded SCI, namely, indicating that the target receiving end determines that no conflict occurs, and performing data transmission by using the resource indicated by the SCI.
In this embodiment, the transmitting end may transmit the SCI in a broadcast manner, in which the identification of the destination receiving end is indicated.
When the receiving end receives the SCI and determines that the node is the target receiving end, resource allocation cooperation is carried out; and when determining that the node is not the target receiving end, recording the resources indicated by the SCI for reference when the node is used for resource selection.
In the embodiment of the application, when the resource conflict is determined, no confirmation information is fed back, only the SCI is forwarded, and the forwarded SCI can be received by a sending end and can also be received by surrounding nodes; and when the resource conflict is determined, feeding back conflict information to the sending end. Thus, the sending end needs a preset period (first preset time) to determine whether to perform resource reselection.
And aiming at the determination result of the target receiving end, if the information conflicts and the confirmation information to a plurality of sending ends, indicating the ID of the sending end, and sending the ID through a piece of feedback information.
Referring to fig. 2, fig. 2 is a schematic diagram of a feedback format for SCI in the embodiment of the present application.
In fig. 2, SCIs sent by N sending terminals are received in a preset period, and for one piece of information fed back by the N sending terminals, a sending terminal ID is respectively given for each sending terminal, so that the receiving terminal can distinguish which information is fed back to the node, and there are two pieces of information, namely feedback confirmation information and non-confirmation information (collision information), for each node.
Example two
In the second embodiment, the target receiving end performs resource allocation cooperation and the peripheral nodes of the target receiving end perform resource allocation together to implement a resource cooperation allocation mode.
Referring to fig. 3, fig. 3 is a schematic view of a resource allocation process of terminal direct communication in the second embodiment of the present application. The method comprises the following specific steps:
In this step, when sending SCI carrying RCI and NCI, it may be broadcast sending or multicast sending, that is, each receiving end is designated: a destination receiving end, and a peripheral node of the destination receiving end.
When broadcasting is sent, the target receiving end and nodes except the peripheral nodes of the target receiving end do not perform resource allocation cooperation when receiving the SCI, and the resources indicated by the SCI are recorded and used as reference for subsequent resource allocation.
The received conflict information for the SCI feedback is fed back by the destination receiver and/or the surrounding nodes.
One receiving end may serve as a destination receiving end or a peripheral node of the destination receiving end to receive SCIs sent by a plurality of sending ends within a preset time, and whether feedback conflicts occur or not is determined according to the SCIs received within the preset time, and the determination result may be that all the SCIs conflict or none of the SCIs conflict or partial conflict or none of the SCIs.
In the embodiment of the application, conflict and non-conflict processing processes are respectively given: feeding back confirmation information to a sending end of the corresponding SCI aiming at the SCI of which the indicated resource allocation does not conflict; aiming at SCI with conflict in the indicated resource allocation, the corresponding SCI is indicated to directly feed back confirmation information to the corresponding sending end of the terminal with the highest priority; and feeding back the conflict information to other sending ends.
When the determination result, that is, when collision information and acknowledgements are transmitted to a plurality of terminals, the transmission terminal ID is indicated and the information is transmitted by one piece of feedback information, the format of the piece of information is the same as that shown in fig. 2, and the information may not be transmitted for the acknowledgement information, that is, no collision.
In the embodiment of the present application, for the acknowledgement information, that is, the feedback information may be sent without collision, or the feedback information may not be sent.
When any node receives the SCI forwarded by the destination node, the resource indicated by the SCI is recorded and used as the reference for selecting the resource by the node.
EXAMPLE III
A way to perform resource allocation cooperation only by surrounding nodes of the destination receiving end.
Referring to fig. 4, fig. 4 is a schematic view of a resource allocation process of terminal direct communication in the third embodiment of the present application. The method comprises the following specific steps:
In this embodiment, SCI may be broadcast or multicast transmitted, where the transmitted SCI carries the ID of the target receiving end and the IDs of the nodes around the target receiving end;
and when any node determines that the SCI carries the ID of the node and the node is not the target receiving end, determining that the node is the peripheral node of the target receiving end.
The node is used as any peripheral node of a destination receiving end, and when the node feeds back collision information to a plurality of sending ends, the node indicates a sending terminal ID and sends the collision information through a piece of feedback information, and the specific format can be seen in fig. 2.
In the embodiments of the application, the waiting time of a sending end is uniformly set as a first preset time; the waiting time of the receiving end is uniformly set as a second preset time, in practical application, the waiting time set by each node can be determined according to the practical application, and the method is not limited in the application.
The first preset time and the second preset time may be the same or different.
In summary, the present application identifies whether the allocated resources collide through resource allocation cooperation of the destination terminal and/or resource allocation cooperation of the nodes around the destination receiving end, and preferentially ensures transmission of a high priority service for a collision situation, so as to reduce a data transmission failure rate caused by resource selection collision.
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 (9)
1. A resource allocation method for terminal direct communication is applied to any node in a terminal direct communication network, and is characterized in that the method comprises the following steps:
the node is used as a sending end, and after resources for sending data are distributed, the node sends secondary link control information (SCI) carrying a Receiving Cooperation Indication (RCI); the RCI instructs a target receiving end to perform resource allocation cooperation; waiting for a first preset time, and retransmitting the SCI aiming at the situation that the SCI does not receive feedback and forwarding information within the first preset time; receiving the SCI forwarded by a target receiving end, and performing data transmission by using the resource indicated by the SCI; when receiving the conflict information fed back by the target receiving end, re-distributing the resources;
the node serves as a receiving end, and when the SCI of which the target receiving end is the node is received, whether the resource indicated by the SCI received in the second preset time conflicts or not is determined: forwarding the SCI for SCI whose indicated resource allocation is not conflicted; aiming at SCI with conflict in the indicated resource allocation, the corresponding SCI is indicated to directly feed back confirmation information to the corresponding sending end of the terminal with the highest priority; and feeding back the conflict information to other sending ends.
2. The method of claim 1, further comprising:
when the node serving as a node except the target receiving end receives the SCI, the resource indicated by the SCI is recorded and used as the reference for selecting the resource by the node.
3. The method according to claim 1 or 2,
when the conflict information is fed back to a plurality of transmitting terminals, the transmitting terminal ID is indicated and transmitted through one piece of feedback information.
4. A resource allocation method for terminal direct communication is applied to any node in a terminal direct communication network, and is characterized in that the method comprises the following steps:
any node is used as a sending end, and after resources for sending data are distributed, secondary link control information SCI carrying a receiving cooperation indication RCI and a neighbor cooperation indication NCI is sent; the RCI instructs a target receiving end to perform resource allocation cooperation; the NCI is used for indicating surrounding nodes of a target receiving end to perform resource allocation cooperation;
the node serves as a receiving end, and when the SCI of which the target receiving end is the node is received, whether the resource indicated by the SCI received in the second preset time conflicts or not is determined: forwarding the SCI for SCI whose indicated resource allocation is not conflicted; aiming at SCI with conflict in the indicated resource allocation, the corresponding SCI is indicated to directly feed back confirmation information to the corresponding sending end of the terminal with the highest priority; feeding back conflict information to other sending ends;
the node is used as any peripheral node of the target receiving end, and whether the resource indicated by the SCI aiming at the same target receiving end received in the second preset time conflicts or not is determined: feeding back confirmation information or not sending the confirmation information to the sending end of the corresponding SCI aiming at the SCI of which the indicated resource allocation does not conflict; aiming at SCI with conflict in the indicated resource allocation, the corresponding SCI is indicated to directly feed back confirmation information to the corresponding sending end of the terminal with the highest priority; feeding back conflict information to other sending ends;
the node serves as a sending end, waits for a first preset time after sending SCI carrying RCI and NCI, and resends the SCI in the first preset time aiming at the situation that the SCI does not receive feedback and forwarding information; receiving the SCI forwarded by a target receiving end, and performing data transmission by using the resource indicated by the SCI; and when the conflict information fed back by aiming at the SCI is received, the resource allocation is carried out again.
5. The method of claim 4, further comprising:
when the node serving as a node except the target receiving end receives the SCI, the resource indicated by the SCI is recorded and used as the reference for selecting the resource by the node.
6. The method according to claim 4 or 5,
when the conflict information is fed back to a plurality of transmitting terminals, the transmitting terminal ID is indicated and transmitted through one piece of feedback information.
7. A resource allocation method for terminal direct communication is applied to any node in a terminal direct communication network, and is characterized in that the method comprises the following steps:
the node is used as a sending end, and after resources for sending data are distributed, the node sends sidelink control information SCI carrying neighbor cooperation indication NCI, wherein the NCI is used for indicating surrounding nodes of a target receiving end to carry out resource distribution cooperation; waiting for a first preset time, determining whether conflict information fed back by aiming at the SCI is received within the first preset time, and if so, re-allocating resources; otherwise, using the resource indicated by the SCI to transmit data;
the node is used as any peripheral node of the target receiving end, and whether the resource indicated by the SCI aiming at the same target receiving end received in the second preset time conflicts or not is determined: feeding back confirmation information or not sending the confirmation information to the sending end of the corresponding SCI aiming at the SCI of which the indicated resource allocation does not conflict; aiming at SCI with conflict in the indicated resource allocation, the corresponding SCI is indicated to directly feed back confirmation information to the corresponding sending end of the terminal with the highest priority; and feeding back the conflict information to other sending ends.
8. The method of claim 7, further comprising:
carrying the ID of a target receiving end and the ID of the peripheral nodes of the target receiving end in the sent SCI;
and when the node determines that the SCI carries the ID of the node and the node is not the target receiving end, the node determines that the node is the peripheral node of the target receiving end.
9. The method according to claim 7 or 8,
the node is used as any peripheral node of a target receiving end, indicates a transmitting terminal ID when the collision information is fed back to a plurality of transmitting ends, and transmits the collision information through one piece of feedback information.
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| CN113938948B (en) * | 2021-09-23 | 2024-02-09 | 中国信息通信研究院 | Configuration method and device for sending cooperative information between side link terminals |
| WO2023051697A1 (en) * | 2021-09-30 | 2023-04-06 | 夏普株式会社 | Method executed by user equipment, and user equipment |
| WO2023077356A1 (en) * | 2021-11-04 | 2023-05-11 | 富士通株式会社 | Resource reselection method and inter-device collaboration method and apparatus |
| WO2024065244A1 (en) * | 2022-09-28 | 2024-04-04 | Qualcomm Incorporated | Inter-user equipment coordination in sidelink |
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