Inter-UE Coordination for Sidelink Resource Allocation
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Solution Overview
Problem
In sidelink communication systems, particularly in 5G V2X communications, devices face challenges in resource allocation due to high power consumption and limited resource sensing capabilities, making it difficult for UEs to perform resource sensing and selection operations efficiently.
Innovation Solution
The proposed method involves inter-UE coordination, where a UE requests resource allocation from another UE or the base station, receives resource set information from performing a resource sensing operation, and selects transmission resources based on this information, thereby reducing the need for its own resource sensing and lowering power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a transmitting UE performs resource sensing operation and resource selection operation to determine transmission resources, then resource allocation reliability is improved, but power consumption increases
Solution Approach 1:
The patent introduces a receiving UE as an intermediary that performs resource sensing operations and provides resource set information to the transmitting UE. This mediator approach allows the transmitting UE to avoid direct resource sensing while still benefiting from reliable resource allocation decisions based on the receiving UE's sensing results and channel conditions.
Solution Approach 2:
The receiving UE performs resource sensing operations in advance before the transmitting UE needs to allocate resources. The sensing results and resource set information are prepared beforehand and provided to the transmitting UE, eliminating the need for the transmitting UE to perform separate sensing operations and reducing its power consumption.
2Measurement precision
If a transmitting UE performs resource sensing operation and resource selection operation, then resource allocation accuracy is improved, but device complexity increases
Solution Approach 1:
The receiving UE acts as an intermediary that performs the complex resource sensing and measurement operations. It collects resource set information from its perspective and provides this processed information to the transmitting UE, which then uses it for resource allocation without needing to perform the complex sensing operations itself.
Solution Approach 2:
The receiving UE serves its own dual purpose: it receives data from the transmitting UE and simultaneously performs resource sensing to assist the transmitting UE's resource allocation. This self-service approach distributes the sensing burden to the receiving UE, reducing the complexity requirements for the transmitting UE.
3Use of energy by moving object
If inter-UE coordination is implemented for resource allocation, then power consumption of transmitting UE is reduced, but communication overhead increases
Solution Approach 1:
The resource set information provided by the receiving UE is tailored specifically to the local channel conditions and resource availability from the receiving UE's perspective. This localized information is precisely what the transmitting UE needs for its specific transmission, avoiding unnecessary general information exchange and reducing overall communication overhead.
Data Source
AI summary
Disclosed are a method and device for allocating sidelink resources on the basis of inter-UE coordination. An operation method of UE-B includes the steps of: transmitting, to first UE-A, a message for requesting resource allocation for sidelink communication; receiving, from the first UE-A, first resource aggregation information including the result of a first resource sensing operation performed in the first UE-A; selecting a transmission resource in consideration of at least one of a first resource aggregation, indicated by the first resource aggregation information, or a third resource aggregation, determined by a third resource sensing operation performed in the UE-B; and performing the sidelink communication by using the transmission resource.