Monitoring-based resource exclusion method in V2X communication

Abstract

The invention provides a monitoring-based resource exclusion method in V2X communication. The method comprises the following steps: a, deleting a part of candidate single-subframe resources accordingto a RSRP measurement result; b, for each remaining candidate single-subframe resource Rx, y, performing linear average on RSSI measured on sub-channels x+k (k=0,...,LsubCH-1) in subframes that can beexpressed as (the formula is described in the specification) (j is a non-negative integer) in a monitoring window to obtain Ex, y, adjusting the Ex, y according to the PSSCH resource reservation intervals, resource locations and RSRP measurement results of other UE and own resource reservation interval to obtain Ex, y; and c, sorting the remaining candidate single-subframe resources in an ascending order of Ex, y, and reserving a preset proportion of Mtotal resources at the front of the queue. By adoption of the monitoring-based resource exclusion method provided by the invention, the priorities of the candidate resources can be sorted more reasonably according to the obtained resource occupation conditions when the resources are excluded.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a monitoring-based resource exclusion method in V2X communication. Background technique [0002] In the V2X communication of the LTE R14 version, the mode4 transmission mode is a mode in which the UE independently selects transmission resources. When the UE is performing mode4 transmission, in order to reduce resource collisions, the UE needs to monitor the surrounding communication environment (sensing), predict the resource occupancy of other UEs according to the sensing results, and predict the resources occupied by other UEs and interfered with according to certain rules. Larger resources are excluded from candidate resources, and the process can be summarized as follows. [0003] First introduce several concepts of V2X communication in LTE R14 version: [0004] PSSCH-RSRP (reference signal received power, hereinafter referred to as RSRP): indicates the average...

AI Technical Summary

Problems solved by technology

[0026] Question 1: If figure 1 As shown, it is assumed that the resource reservation interval P of UE A performing monitoring rsvp_TX is 200ms, for the candidate resource R in the selection window x,y1 and R x,y2 , the RSSI obtained by measuring the corresponding resource positions of the two in the listening window comes from the transmission of UE B respectively (resource reservation interval P rsvp_RX =100ms, marked by slash) and UE C’s transmission (resource reservation interval P rsvp_RX =200ms, marked by a horizontal line)

[0030] Question 2: If figure 2 As shown, it is assumed that the resource reservation interval P of UE A performing monitoring rsvp_TX is 200ms, for the candidate resource R in the listening window x,y1 and R x,y2 , the RSSI obtained by measuring the corresponding resource positions of the two in the listening window comes from the transmission of UE B respectively (resource reservation interval P rsvp_RX =200ms, marked by a slash) and the transmission of UE C (resource reservation interval P rsvp_RX =200ms, marked by a horizontal line)

[0034] To sum up, in the resource exclusion method proposed by the current LTE R14 version, the step (4) of sorting resources according to received power does not consider the impact of resource reservation interval and resource location on resource collision, and needs to be further improved

Images