CN113099479B - Method for determining perception moment in direct communication - Google Patents
Method for determining perception moment in direct communication Download PDFInfo
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- CN113099479B CN113099479B CN202110353810.5A CN202110353810A CN113099479B CN 113099479 B CN113099479 B CN 113099479B CN 202110353810 A CN202110353810 A CN 202110353810A CN 113099479 B CN113099479 B CN 113099479B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- 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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/10—Connection setup
- H04W76/14—Direct-mode setup
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- 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]
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Abstract
The invention provides a method for determining a perception moment in direct connection communication, which comprises the following steps: s1, configuring partial sensing and SL-DRX in the resource pool; s2, determining one or more initial sensing moments; s3, determining the final sensing time according to whether the initial sensing time and the SL-DRX ON time period are overlapped; s31, if there is no overlap, that is, all the initial sensing moments are in the OFF time period of the SL-DRX, finally determining that there is no sensing moment or acquiring a new set of sensing moments and returning to the step S3; s32, if there is overlap, the time slot of the overlap part forms the final perception time; the method for determining the sensing time in the direct connection communication can determine the final sensing time when partial sensing and SL-DRX are simultaneously configured in a resource pool.
Description
Technical Field
The invention relates to the technical field of direct connection communication, in particular to a method for determining a perception moment 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 may affect the existing resource selection method based on the partial sensing, and a problem of how to determine the sensing time when the partial sensing and the SL-DRX are configured in the resource pool at the same time needs to be solved.
Disclosure of Invention
The invention aims to provide a method for determining a perception moment in direct connection communication, so as to overcome the defects in the prior art.
In order to achieve the purpose, the invention provides the following technical scheme:
the application discloses a method for determining perception time in direct connection communication, which comprises the following steps:
s1, configuring partial sensing and SL-DRX in the resource pool;
s2, determining one or more initial sensing moments;
s3, determining the final sensing time according to whether the initial sensing time and the SL-DRX ON time period are overlapped;
s31, if there is no overlap, that is, all the initial sensing moments are in the OFF time period of the SL-DRX, finally determining that there is no sensing moment or acquiring a new set of sensing moments and returning to the step S3;
s32, if there is overlap, the time slot of the overlap portion constitutes the final sensing time.
Preferably, the initial sensing time in step S2 is a set of time slots, and the index of the time slot in the initial sensing time is used for the index
Denotes, y ∈ { Y }1，...，yYAnd (c) the step of (c) in which,
indexes representing Y candidate time slots in the resource selection window; preserve∈{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, in step S31, if it is finally determined that there is no sensing time, the UE does not perform the sensing operation, and randomly selects one resource in the Y candidate time slots.
Preferably, if a new group of sensing time points is obtained in step S31, the index of the time slot in the new sensing time point is according to a formula
Thus obtaining the product.
The invention has the beneficial effects that: compared with the prior art, the method for determining the sensing time in the direct connection communication can determine the final sensing time when partial sensing and SL-DRX are simultaneously configured in the resource pool, thereby reducing the energy consumption brought by resource sensing.
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 sensing moments of a method for determining sensing moments in direct communication according to the present invention;
fig. 2 is a schematic diagram of the absence of sensing time in the method for determining sensing time in direct connection communication according to the present invention;
fig. 3 is a schematic diagram of all time slots within the sensing time of the method for determining the sensing time in the direct connection communication of the present invention being located within the ON period of SL-DRX;
fig. 4 is a schematic diagram of a part of time slots in the sensing time within the SL-DRX ON time period in the method for determining the sensing time in direct communication according to the present invention;
fig. 5 is a diagram illustrating a new sensing time of the method for determining the sensing time in the direct connection 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.
A method for determining a perception moment in direct communication comprises the following steps:
s1, configuring partial sensing and SL-DRX in the resource pool;
s2, determining one or more initial pointsStarting to sense the moment; the initial sensing time in step S2 is a set of a group of time slots, and the index of the time slot in the initial sensing time is used
Denotes, y ∈ { Y }1，...，yYAnd (c) the step of (c) in which,
indexes representing Y candidate time slots in the resource selection window; preserve∈{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.
S3, determining the final sensing time according to whether the initial sensing time and the SL-DRX ON time period are overlapped;
s31, if there is no overlap, that is, all the initial sensing moments are in the OFF time period of the SL-DRX, finally determining that there is no sensing moment or acquiring a new set of sensing moments and returning to the step S3; if the sensing moment is finally determined to be absent, the UE does not execute sensing operation and randomly selects a resource in the Y candidate time slots; if a new group of sensing time is obtained, the index of the time slot in the new sensing time is according to the formula
Thus obtaining the product.
S32, if there is overlap, the time slot of the overlap portion constitutes the final sensing time.
Referring to fig. 1, a time n is a trigger time of resource selection or reselection, Y candidate slots are provided in a resource selection window after the time n, and indexes of the candidate slots are used
Indicating that the UE obtains a group of resource reservation period values P according to high-layer signaling configuration or pre-configuration1，P2，...，PNFor each period value, corresponding to a sensing time, each sensing time packetComprising Y time slots, period P1，P2，...，PNCorresponding to sensing time 1, sensing time 2, …, and sensing time N, respectively, as indicated by the hatched portion in fig. 1.
Referring to fig. 2, a final sensing time is determined according to whether the initial sensing time and the ON time period of the SL-DRX overlap, and in fig. 2, if all the initial sensing times are located in the OFF time period of the SL-DRX, it is finally determined that there is no sensing time, and at this time, the UE does not perform the sensing operation, and randomly selects one resource for data transmission in the Y candidate time slots.
Referring to fig. 3, a final sensing time is determined according to whether an initial sensing time overlaps with an ON time period of the SL-DRX, in fig. 3, if the sensing time 1, the sensing time 2, and the ON time period of the SL-DRX overlap, a time slot of the overlapping portion constitutes the final sensing time, and in fig. 3, all time slots included in the sensing time 1 and the sensing time 2 are located within the ON time period of the SL-DRX, all time slots included in the sensing time 1 and the sensing time 2 constitute the final sensing time, as shown by a hatched portion of a slash in fig. 3, the UE needs to monitor pspscch at the final sensing time to obtain resource occupation or reservation information of other UEs, and select one available resource from Y candidate time slots for data transmission according to a sensing result.
Referring to fig. 4, a final sensing time is determined according to whether an initial sensing time overlaps with an ON time period of the SL-DRX, in fig. 4, if the sensing time 1, the sensing time 2, and the ON time period of the SL-DRX overlap, a time slot of the overlapping portion constitutes the final sensing time, in fig. 4, a part of the time slot within the sensing time 2 and all of the time slots within the sensing time 1 are located within the ON time period of the SL-DRX, and a part of the time slot within the sensing time 2 and all of the time slots within the sensing time 1 constitute the final sensing time, as shown by a hatched portion in a diagonal line in fig. 4, the UE needs to monitor a PSCCH at the final sensing time constituted by the time slots, acquire resource occupation or reservation information of other UEs, and select an available resource from Y candidate time slots for data transmission according to a sensing result.
Referring to fig. 5, depending ON whether there is an overlap between the initial sensing time and the ON period of the SL-DRX,determining a final sensing time, in fig. 5, the initial sensing time is a set of sensing times corresponding to k-1 in fig. 5, and is represented by a solid line box, it can be seen that all the initial sensing times are located in the OFF period of the SL-DRX
The set of sensing times corresponding to k-2 in fig. 5 is shown by a dashed box. And after acquiring the new sensing time, determining the final sensing time according to whether the new sensing time is overlapped with the ON time period of the SL-DRX.
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 (1)
1. A method for determining a perception moment in direct communication is characterized by comprising the following steps:
s1, configuring partial sensing and SL-DRX in the resource pool;
s2, determining one or more initial sensing moments; the initial sensing time in step S2 is a set of a group of time slots, and the index of the time slot in the initial sensing time is used
It is shown that,
wherein, in the step (A),
representing within a resource selection window
An index of a candidate slot;
，
representing a set of resource reservation period values;
and
are all positive integers greater than or equal to 1;
s3, determining the final sensing time according to whether the initial sensing time and the SL-DRX ON time period are overlapped; s31, if there is no overlap, that is, all the initial sensing moments are in the OFF time period of the SL-DRX, acquiring a new set of sensing moments and returning to the step S3; if a new group of sensing time is obtained, the index of the time slot in the new sensing time is according to the formula
Obtaining;
s32, if there is overlap, the time slot of the overlap portion constitutes the final sensing time.
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