NR V2X Sidelink Resource Pools to Avoid Transport Block Delay
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Solution Overview
Problem
Existing wireless communication systems face challenges in efficiently managing resource allocation for sidelink communication in NR V2X scenarios, particularly in vehicle-to-everything (V2X) applications, which require enhanced mobile broadband, ultra-reliable, and low-latency communication to support services like vehicle platooning, advanced driving, and remote driving.
Innovation Solution
A method and apparatus for performing sidelink communication using a resource pool, involving the transmission of transport blocks and system information request messages over allocated and exceptional resource pools, facilitated by a base station, to enhance communication efficiency between user equipment (UEs).
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a UE requests system information from a base station during sidelink communication, then the UE can obtain necessary system information, but the transmission of the second transport block is delayed
Solution Approach 1:
The patent applies preliminary action by pre-configuring exceptional resource pools before the UE needs to request system information. When a UE is in the process of requesting system information, it can immediately transmit the second transport block using the pre-configured exceptional resource pool, avoiding the delay that would otherwise occur while waiting for resource allocation. This resolves the contradiction by preparing resources in advance so that information transmission can proceed without interruption.
2Productivity
If a UE transmits transport blocks using allocated resources, then communication efficiency is maintained, but resource flexibility is reduced when system information requests are needed
Solution Approach 1:
The patent applies segmentation by dividing the resource pool into two distinct parts: normal resource pools for regular sidelink communication and exceptional resource pools for use during system information requests. This segmentation allows the UE to maintain efficient communication using normal resources while having dedicated exceptional resources available when system information requests occur, thus preserving both communication efficiency and resource allocation flexibility without conflict.
Solution Approach 2:
The exceptional resource pool acts as an intermediary mechanism that mediates between the need for continuous efficient communication and the need for flexible resource allocation during system information requests. When a system information request is detected, the exceptional resource pool is activated to handle the second transport block transmission, allowing the normal resource allocation to remain unchanged and efficient while providing the necessary flexibility for the special case.
Data Source
AI summary
According to an embodiment of the present disclosure, provided is a method by which a first apparatus performs sidelink communication. The method may comprise the steps of: transmitting a first transport block to a second apparatus, on a resource allocated by a first SL grant received from a base station; transmitting, to the base station, a system information request message requesting system information; transmitting, on an exceptional resource pool, a second transport block to the second apparatus, on the basis of the transmission of the system information request message to the base station; and receiving, from the base station, first system information related to the system information request message.