CN113099471A - Method for determining candidate resource set in direct communication - Google Patents

Method for determining candidate resource set in direct communication Download PDF

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Publication number
CN113099471A
CN113099471A CN202110353812.4A CN202110353812A CN113099471A CN 113099471 A CN113099471 A CN 113099471A CN 202110353812 A CN202110353812 A CN 202110353812A CN 113099471 A CN113099471 A CN 113099471A
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candidate
resource
determining
drx
time slot
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刘萌萌
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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
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/02—Arrangements for optimising operational condition
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0446—Resources in time domain, e.g. slots or frames
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/14—Direct-mode setup
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/28—Discontinuous transmission [DTX]; Discontinuous reception [DRX]
    • 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

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention provides a method for determining a candidate resource set in direct connection communication, which comprises the following steps: s1, configuring partial sensing and SL-DRX in the resource pool; s2, determining the position of the resource selection window and the position of the perception moment; s3, determining candidate time slots according to the configuration information of the SL-DRX, the position of the resource selection window and the position of the perception moment; and S4, all the resources on the candidate time slot form a candidate resource set. Compared with the prior art, the method for determining the candidate resource set in the direct communication can determine the final candidate resource set when partial sensing and SL-DRX are configured in the resource pool at the same time, thereby reducing energy consumption brought by resource selection.

Description

Method for determining candidate resource set in direct communication
Technical Field
The invention relates to the technical field of direct connection communication, in particular to a method for determining a candidate resource set in direct connection communication.
Background
When a User Equipment (UE) performs direct link (SL) communication, if there is no coverage of a base station or only partial coverage, the UE may use an autonomous resource selection mode, which includes the following basic processes: the UE continuously senses a period of time (called a sensing window) before a triggering time n of resource selection or reselection, monitors a Physical direct link Control Channel (PSCCH), acquires resource reservation information of other UEs indicated by the PSCCH, judges whether candidate resources in the resource selection window are available, and excludes resources occupied or reserved by other UEs, so that the resource conflict probability is reduced, and the data transmission reliability is improved.
Since continuous sensing consumes more power, in order to reduce power consumption, the prior art adopts a mode of configuring SL Discontinuous Reception (DRX) and partial-sensing (partial-sensing) for resource selection. And if the SL-DRX is configured, stopping monitoring and data transmission on the PSCCH in the SL-DRX OFF period so as to reduce energy consumption.
However, configuring the SL-DRX affects the existing resource selection method, and the problem of how to determine the candidate resource set when the SL-DRX is configured needs to be solved.
Disclosure of Invention
The present invention provides a method for determining a candidate resource set in direct connection communication, so as to overcome the deficiencies in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the application discloses a method for determining a candidate resource set in direct connection communication, which is characterized by comprising the following steps:
s1, configuring partial sensing and SL-DRX in the resource pool;
s2, determining the position of the resource selection window and the position of the perception moment;
s3, determining candidate time slots according to the configuration information of the SL-DRX, the position of the resource selection window and the position of the perception moment;
and S4, all the resources on the candidate time slot form a candidate resource set.
Preferably, in step S2, the location of the sensing time is determined according to one or more resource reservation period values, which are configured or preconfigured by the higher layer signaling, and the sensing time is one or more.
Preferably, the configuration information of the SL-DRX in step S3 includes information of an OFF period of the SL-DRX.
Preferably, in step S3, the index of all slots in the resource selection window forms a set S ═ { y ═ y1，...，yA} of whichWherein A represents the number of time slots in the resource selection window;
preferably, the step S3 includes the following sub-steps:
s31, if the resource selection window and the OFF time period of the SL-DRX are overlapped, the index of the time slot of the overlapped part is excluded from the set S;
s32, if the last sensing time overlaps with the OFF time period of the SL-DRX, the index of the time slot related to the overlapping part is excluded from the set S; the latest sensing moment is the sensing moment closest to the triggering moment n of resource selection or reselection;
s33, the residual time slot is a candidate time slot;
preferably, the time slot associated with the overlapping part in step S32 is determined by the following method: if the index of the time slot in which the overlap portion is located can be expressed as
Figure BDA0003002919620000021
The index of the slot with which it is associated is
Figure BDA0003002919620000022
Wherein
Figure BDA0003002919620000023
Index, P, representing A candidate time slots in a resource selection windowreserve∈{P1，P2，...，PN}，P1，P2，...，PNRepresenting a set of resource reservation period values; k and N are both positive integers greater than or equal to 1.
Preferably, each of all the resources on the candidate time slot in step S4 includes L consecutive sub-channels on the time slot, where L is greater than or equal to the number of sub-channels required for data to be transmitted.
The invention has the beneficial effects that: compared with the prior art, the method for determining the candidate resource set in the direct communication can determine the final candidate resource set when partial sensing and SL-DRX are configured in the resource pool at the same time, thereby reducing energy consumption brought by resource selection.
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 schematic diagram of a candidate timeslot of a method for determining a candidate resource set in direct communication according to the present invention;
fig. 2 is a schematic diagram of candidate resources in a method for determining a candidate resource set in direct communication according to 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.
The embodiment of the invention provides a method for determining a candidate resource set in direct connection communication, which is characterized by comprising the following steps:
s1, configuring partial sensing and SL-DRX in the resource pool;
s2, determining the position of the resource selection window and the position of the perception moment;
s3, determining candidate time slots according to the configuration information of the SL-DRX, the position of the resource selection window and the position of the perception moment;
and S4, all the resources on the candidate time slot form a candidate resource set.
In step S2, the location of the sensing time is determined according to one or more resource reservation period values, which are configured or preconfigured by the high layer signaling, and the sensing time is one or more. The configuration information of the SL-DRX in the step S3 includes information of an OFF period of the SL-DRX. In step S3, the indexes of all slots in the resource selection window form a set S ═ y1，...，yAA, wherein a represents the number of time slots in the resource selection window; the step S3 includes the following sub-steps:
s31, if the resource selection window and the OFF time period of the SL-DRX are overlapped, the index of the time slot of the overlapped part is excluded from the set S;
s32, if the last sensing time overlaps with the OFF time period of the SL-DRX, the index of the time slot related to the overlapping part is excluded from the set S; the latest sensing moment is the sensing moment closest to the triggering moment n of resource selection or reselection;
s33, the residual time slot is a candidate time slot;
the time slot associated with the overlapping portion in the step S32 is determined by the following method: if the index of the time slot in which the overlap portion is located can be expressed as
Figure BDA0003002919620000041
The index of the slot with which it is associated is
Figure BDA0003002919620000042
Figure BDA0003002919620000043
Wherein
Figure BDA0003002919620000044
Index, P, representing A candidate time slots in a resource selection windowreserve∈{P1，P2，...，PN}，P1，P2，...，PNRepresenting a set of resource reservation period values; k and N are both positive integers greater than or equal to 1. Each resource in all the resources on the candidate time slot in step S4 includes L consecutive sub-channels on the time slot, where L is greater than or equal to the number of sub-channels required by the data to be transmitted.
Referring to FIG. 1, there are A slots in the resource selection window, and the index is shown as
Figure BDA0003002919620000045
In the present invention, if the resource selection window and the OFF period of SL-DRX are overlapped, the index of the time slot of the overlapped part is excluded from the set s, and in FIG. 1, the time slot in the resource selection window
Figure BDA0003002919620000046
Overlap with OFF period of SL-DRX, time slot
Figure BDA0003002919620000047
Are excluded. In the present invention, if the last sensing time overlaps with the OFF period of SL-DRX, the index of the slot associated with the overlapping portion is excluded from the set s. In fig. 1, 2 resource reservation period values P are configured in the resource pool115ms and P230ms, corresponding to sensing time 1 and sensing time 2, respectively. The last sensing time is sensing time 1 in the figure, the sensing time 1 is overlapped with the SL-DRX OFF time period, the overlapped part is shown as the dotted line shaded part in figure 1, wherein one time slot index is
Figure BDA0003002919620000051
With an associated slot index of
Figure BDA0003002919620000052
Then index
Figure BDA0003002919620000053
Excluded from the set s. After the above-mentioned exclusion operation is performed, Y-1 candidate slots remain, as shown by the hatched portion of the grid in fig. 1.
Referring to fig. 2, there are Y candidate slots in the candidate resource set, each slot includes 2 candidate resources, that is, the candidate resource set includes 2 × Y candidate resources, and each candidate resource includes L consecutive sub-channels in the slot, as shown by the cross-hatching in fig. 2.
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 (7)

1. A method for determining a candidate resource set in direct communication, comprising:
s1, configuring partial sensing and SL-DRX in the resource pool;
s2, determining the position of the resource selection window and the position of the perception moment;
s3, determining candidate time slots according to the configuration information of the SL-DRX, the position of the resource selection window and the position of the perception moment;
and S4, all the resources on the candidate time slot form a candidate resource set.
2. The method of claim 1 for determining a set of candidate resources in direct communication, wherein: in step S2, the location of the sensing time is determined according to one or more resource reservation period values, which are configured or preconfigured by the high layer signaling, and the sensing time is one or more.
3. The method of claim 1 for determining a set of candidate resources in direct communication, wherein: the configuration information of the SL-DRX in the step S3 includes information of an OFF period of the SL-DRX.
4. The method of claim 1 for determining a set of candidate resources in direct communication, wherein: in step S3, the indexes of all slots in the resource selection window form a set S ═ y1，...，yAA, wherein a represents the number of time slots in the resource selection window;
5. the method of claim 3, wherein the method for determining the candidate resource set in direct communication comprises: the step S3 includes the following sub-steps:
s31, if the resource selection window and the OFF time period of the SL-DRX are overlapped, the index of the time slot of the overlapped part is excluded from the set S;
s32, if the last sensing time overlaps with the OFF time period of the SL-DRX, the index of the time slot related to the overlapping part is excluded from the set S; the latest sensing moment is the sensing moment closest to the triggering moment n of resource selection or reselection;
s33, the residual time slot is a candidate time slot;
6. the method of claim 5, wherein the method for determining the candidate resource set in direct communication comprises: the time slot associated with the overlapping portion in the step S32 is determined by the following method: if the index of the time slot in which the overlap portion is located can be expressed as
Figure FDA0003002919610000021
The index of the slot with which it is associated is
Figure FDA0003002919610000022
y∈{y1，...，yATherein of
Figure FDA0003002919610000023
Index, P, representing A candidate time slots in a resource selection windowreserve∈{P1，P2，...，PN}，P1，P2，...，PNRepresenting a set of resource reservation period values; k and N are both positive integers greater than or equal to 1.
7. The method of claim 5, wherein the method for determining the candidate resource set in direct communication comprises: each resource in all the resources on the candidate time slot in step S4 includes L consecutive sub-channels on the time slot, where L is greater than or equal to the number of sub-channels required by the data to be transmitted.
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Application publication date: 20210709