CN112929973B - Method for triggering cooperation between UE - Google Patents

Method for triggering cooperation between UE Download PDF

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CN112929973B
CN112929973B CN202110157667.2A CN202110157667A CN112929973B CN 112929973 B CN112929973 B CN 112929973B CN 202110157667 A CN202110157667 A CN 202110157667A CN 112929973 B CN112929973 B CN 112929973B
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resource pool
pscch
sci format
resource
sci
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CN112929973A (en
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刘萌萌
李振廷
邓浩瑜
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Zhejiang Lab
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Zhejiang Lab
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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
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/50—Allocation or scheduling criteria for wireless resources
    • H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Abstract

The invention provides a method for triggering cooperation between UE (user equipment), which comprises the following steps: receiving resource pool configuration information; if the resource pool configuration information contains the configuration information of the SCI format X, the UE-A monitors the SCI format X in the resource pool; otherwise, ending the process; the SCI format X contains a type indication of a resource set, wherein the type indication of the resource set is used for indicating the type of the resource set sent by UE-A; if the SCI format X is monitored by the UE-A, the UE-B is considered to request the cooperation between the UEs; otherwise, the process is ended. Compared with the prior art, the method and the device have the advantages that a new SCI format is designed, the cooperation between the UEs can be requested dynamically and as required, the transmission delay of the cooperation information between the UEs can be reduced, and the effectiveness of the cooperation information can be improved.

Description

Method for triggering cooperation between UE
Technical Field
The invention relates to the technical field of cooperation between UE (user equipment), in particular to a method for triggering cooperation between UE.
Background
In a 5G New air interface (New Radio, NR), when a User Equipment (UE) transmits and receives data through a sidelink (sidelink), there are two resource allocation modes (mode), one is resource allocation performed by a base station and is called mode 1, and the other is autonomous resource selection performed by the UE (mode 2). When the sending-end UE operates in mode 2, the power consumption of the conventional autonomous resource selection method is large, and the selected resource is affected by the hidden node, for example, if the hidden node occupies the selected resource, resource conflict may be caused. In addition, the traditional autonomous resource selection method is influenced by factors such as continuous collision and the like. And cooperation among UEs is widely considered to improve the reliability of resource selection and reduce the power consumption of mode 2 UEs.
In the prior art, Inter-UE coordination (Inter-UE coordination) triggering methods are mainly classified into two types, one is that a coordination UE (UE-a) actively sends coordination information, and the other is that a sending-end UE (UE-B) actively requests Inter-UE coordination.
If the cooperative UE (UE-a) actively transmits the cooperative information, the cooperative UE may not know information such as the size of a data packet to be transmitted, remaining time delay, and priority of the sending-end UE (UE-B), so that the cooperative information (hereinafter referred to as a cooperative resource set) transmitted by the cooperative UE may not meet the data transmission requirement of the sending-end UE, and the sending-end UE needs to further process the cooperative information to select a suitable transmission resource from the cooperative information, thereby increasing the time delay and power consumption of the sending-end UE. In addition, the scheme also generally requires that the coordinated UE periodically transmit coordinated information, and even transmit corresponding coordinated resource sets for the sizes and priorities of a plurality of data packets, the transmission of the coordinated information itself also needs to occupy transmission resources, but there is a risk of increasing the probability of resource collision.
If the sending end UE (UE-B) actively requests the cooperation between the UEs, at least two signaling transmission requests and responses are needed, and the risk of increasing time delay exists. When the cooperative UE sends the cooperation information, it needs to indicate whether the sent resource set is a recommended resource or an interference resource, so as to help the sending-end UE to perform resource selection for data transmission. In the scheme, the sending end UE cannot actively select the type of the cooperative resource set, and is not friendly to the UE which needs to quickly select resources and reduce power consumption. For example, UE-B needs a set of recommended resources to quickly select a suitable resource from the set of recommended resources for data packet transmission, but the set of cooperative resources sent by UE-a is a set of interfering resources, and UE-B cannot directly select resources from the set of interfering resources, and still needs to perform the conventional resource sensing and autonomous resource selection process, which increases transmission delay and power consumption.
Disclosure of Invention
The invention aims to provide a method for triggering cooperation between UE (user equipment) so as to overcome the technical problem of 'how to trigger cooperation between UE' in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the application discloses a method for triggering cooperation between UE, which comprises the following steps: (1) receiving resource pool configuration information; the resource pool includes the following three cases: a: the resource pool is specially used for transmitting the cooperation information between the UEs; b: the rest PRBs in the resource pool can be used for transmitting the cooperation information between the UEs; c: frequency domain resources except the PSFCH resources on the time slot where the PSFCH resources are located in the resource pool can be used for transmitting cooperation information between the UEs; (2) if the resource pool configuration information contains the configuration information of the SCI format X, the UE-A monitors the SCI format X in the resource pool; otherwise, ending the process; the SCI format X contains a type indication of a resource set, wherein the type indication of the resource set is used for indicating the type of the resource set sent by UE-A; (3) if the SCI format X is monitored by the UE-A, the UE-B is considered to request cooperation among the UEs; otherwise, the process is ended.
Preferably, the configuration information of the SCI format X in step (2) includes one or more of a frequency domain size of a PSCCH candidate and a number of time domain symbols, where the SCI format X includes sensing parameters, and the sensing parameters include a number of sub-channels required by a packet, a remaining delay, and a priority of the packet.
Preferably, the types of the resource sets in step (2) include available for UE-B transmission and unavailable for UE-B transmission.
Preferably, the type of the set of resources that are not available for UE-B transmission is an interference resource.
Preferably, the SCI format X in step (2) is the first-stage SCI or the second-stage SCI.
Preferably, the SCI format X is a first-stage SCI, the resource pool is a case a, and each subchannel on each time slot in the resource pool contains a PSCCH candidate; if the residual PRBs exist, the residual PRBs contain PSCCH candidates only when the number of the residual PRBs is larger than or equal to the frequency domain size of the PSCCH candidates; otherwise, the remaining PRBs do not contain PSCCH candidates; the number of PSCCH candidates included in the remaining PRBs may be one or more.
Preferably, the SCI format X is a first-stage SCI, the resource pool is a case b, each time slot in the resource pool only includes PSCCH candidates in remaining PRBs, no PSCCH candidate is included in a subchannel, and the number of PSCCH candidates included in the remaining PRBs may be one or more.
Preferably, the SCI format X is a first-stage SCI, the resource pool is a case c, each sub-channel in a time slot where a PSFCH resource in the resource pool is located includes one or more PSCCH candidates, the PSCCH candidates occupy 1 OFDM symbol in a time domain, the resource pool configuration information includes a bit map for indicating a frequency domain position of the PSCCH candidates, each bit in the bit map corresponds to one PSCCH candidate, and the PSCCH candidates carry the SCI format X.
Preferably, the PSCCH candidate is calculated from the lowest PRB index of the resource pool if the subchannel size is not an integer multiple of the frequency domain size of the PSCCH candidate.
Preferably, the UE-B in step (3) is a UE that sends the SCI format X.
The invention has the beneficial effects that: compared with the prior art, the triggering method for the cooperation between the UEs provided by the invention designs a new SCI format, can dynamically request the cooperation between the UEs as required, can reduce the transmission delay of the cooperation information between the UEs, and can improve the effectiveness of the cooperation information.
The features and advantages of the present invention will be described in detail by embodiments in conjunction with the accompanying drawings.
Drawings
FIG. 1 is a flowchart of a method for triggering cooperation between UEs according to the present invention;
FIG. 2 is a schematic diagram of a first embodiment of the present invention;
FIG. 3 is a schematic diagram of a second embodiment of the present invention;
FIG. 4 is a schematic diagram of a third embodiment of the present invention;
FIG. 5 is a schematic illustration of a fourth embodiment of the present invention;
FIG. 6 is a bitmap of an embodiment four of the present invention;
fig. 7 is a bitmap of an embodiment five of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Referring to fig. 1, the triggering method for cooperation between UEs of the present invention includes (1) receiving resource pool configuration information; (2) if the resource pool configuration information contains the configuration information of the SCI format X, the UE-A monitors the SCI format X in the resource pool; otherwise, ending the process; (3) if the SCI format X is monitored by the UE-A, the UE-B is considered to request the cooperation between the UEs; otherwise, the process is ended. The resource pool configuration information includes the following three conditions: a: the resource pool is specially used for transmitting the cooperation information between the UEs; b: the rest PRBs in the resource pool can be used for transmitting the cooperation information between the UEs; c: frequency domain resources except the PSFCH resources on the time slot where the PSFCH resources are located in the resource pool can be used for transmitting cooperation information between the UEs;
the first embodiment is as follows:
referring to fig. 2, the SCI format X is the first stage SCI, the resource pool is case a, and each sub-channel in each time slot in the resource pool contains a PSCCH candidate; if the residual PRBs exist, only when the number of the residual PRBs is larger than or equal to the frequency domain size of the PSCCH candidate, the residual PRBs contain the PSCCH candidate; the number of PSCCH candidates included in the remaining PRBs may be one or more.
Example two:
on the contrary, referring to fig. 3, the remaining PRBs do not include PSCCH candidates;
example three:
referring to fig. 4, the SCI format X is the first-stage SCI, the resource pool is the case b, the PSCCH candidate is only included in the remaining PRBs and no PSCCH candidate is included in the sub-channel in each slot of the resource pool, and the number of PSCCH candidates included in the remaining PRBs may be one or more.
Example four:
referring to fig. 5, the SCI format X is a first-stage SCI, the resource pool is a case c, each sub-channel in a time slot where a PSFCH resource in the resource pool is located includes one or more PSCCH candidates, the PSCCH candidates occupy 1 OFDM symbol in a time domain, and the PSCCH candidates carry the SCI format X; referring to fig. 6, the frequency domain position of a PSCCH candidate may be indicated by a bit map, each bit corresponding to a PSCCH candidate;
example five:
referring to fig. 7, if the subchannel size is not an integer multiple of the frequency domain size of the PSCCH candidate, the PSCCH candidate is counted from the lowest PRB index of the resource pool. (fig. 7, the size of the sub-channel is 10 PRBs, the size of the PSCCH candidate frequency domain is 3 PRBs, and the frequency cannot be evenly divided, so that the most significant bit of the bitmap corresponds to the first PSCCH candidate, and the first PSCCH candidate occupies PRBs #0, #1, #2 in the frequency domain).
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 or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.

Claims (8)

1. A method for triggering cooperation between UEs is characterized by comprising the following steps:
(1) receiving resource pool configuration information; the resource pool includes the following three cases:
a: the resource pool is specially used for transmitting the cooperation information between the UEs;
b: the rest PRBs in the resource pool can be used for transmitting the cooperation information between the UEs;
c: frequency domain resources except the PSFCH resources on the time slot where the PSFCH resources are located in the resource pool can be used for transmitting cooperation information between the UEs;
(2) if the resource pool configuration information contains the configuration information of the SCI format X, the UE-A monitors the SCI format X in the resource pool; otherwise, ending the process; the SCI format X contains a type indication of a resource set, wherein the type indication of the resource set is used for indicating the type of the resource set sent by UE-A; the type of the resource set includes available for UE-B transmission and unavailable for UE-B transmission; the type of the resource set which can not be used for UE-B transmission is interference resource;
(3) if the SCI format X is monitored by the UE-A, the UE-B is considered to request the cooperation between the UEs; otherwise, the process is ended.
2. The method of claim 1, wherein in step (2), the configuration information of SCI format X includes one or more of a frequency domain size of PSCCH candidate and a time domain symbol number, and the SCI format X includes sensing parameters, and the sensing parameters include a number of sub-channels required for a packet, a residual delay, and a priority of the packet.
3. The method of claim 1, wherein the SCI format X in step (2) is a first-stage SCI or a second-stage SCI.
4. The method of claim 3, wherein the SCI format X is first-stage SCI, the resource pool is case a, and a PSCCH candidate is included in each sub-channel of each slot in the resource pool; if the residual PRBs exist, the residual PRBs contain PSCCH candidates only when the number of the residual PRBs is larger than or equal to the frequency domain size of the PSCCH candidates; otherwise, the remaining PRBs do not contain PSCCH candidates; the number of PSCCH candidates included in the remaining PRBs may be one or more.
5. The method of claim 3, wherein the SCI format X is the first-stage SCI, the resource pool is the case b, the PSCCH candidate is only contained in the remaining PRBs and no PSCCH candidate is contained in the sub-channel in each slot of the resource pool, and the number of PSCCH candidates contained in the remaining PRBs may be one or more.
6. The method of claim 3, wherein the SCI format X is a first-stage SCI, the resource pool is a case c, each sub-channel in a time slot where a PSFCH resource is located in the resource pool includes one or more PSCCH candidates, the PSCCH candidates occupy 1 OFDM symbol in a time domain, the resource pool configuration information includes a bit map indicating frequency domain positions of the PSCCH candidates, each bit in the bit map corresponds to a PSCCH candidate, and the PSCCH candidates carry the SCI format X.
7. The method of claim 6, wherein if the sub-channel size is not an integer multiple of the frequency domain size of the PSCCH candidate, the PSCCH candidate is counted from the lowest PRB index of the resource pool.
8. The method of claim 1, wherein in step (3), the UE-B is the UE sending the SCI format X.
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