NR V2X Relay Resource Requests for Buffered Sidelink Data
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Solution Overview
Problem
Existing technologies struggle to support sidelink communication through a relay effectively, especially in in-coverage or out-coverage scenarios, to enhance coverage and power efficiency for various V2X applications and services.
Innovation Solution
A method and device for wireless communication that involves receiving physical sidelink control and shared channels, storing data in buffers, transmitting scheduling requests or buffer status reports to a base station, and utilizing allocated resources for data transmission, enabling efficient data relaying.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If sidelink communication through relay is implemented to enhance coverage and power efficiency, then network coverage and energy consumption are improved, but device complexity and protocol overhead increase
Solution Approach 1:
The patent introduces a relay UE as an intermediary device that facilitates communication between remote UEs and the network. The relay UE receives data from remote UEs via sidelink, stores it in a buffer, and transmits it to the network via Uu interface, thereby extending network coverage without requiring direct connection between all devices.
Solution Approach 2:
The patent segments the communication path into two distinct interfaces: PC5 interface for sidelink communication between UEs and Uu interface for network communication. This segmentation allows independent optimization of each interface and simplifies the overall protocol by separating relay functionality from direct communication.
2Productivity
If relay UE buffers data from multiple remote UEs before transmission, then data transmission efficiency is improved, but buffer management complexity increases
Solution Approach 1:
The relay UE performs preliminary actions by buffering data from multiple remote UEs before transmission to the network. This allows the relay UE to accumulate data and transmit it in batches, improving transmission efficiency and reducing the overhead of frequent small transmissions.
Solution Approach 2:
The patent merges the buffering functionality into a unified mechanism that handles data from multiple remote UEs. The relay UE combines data from different UEs in its buffer and transmits them together, simplifying the management process compared to handling each UE's data separately.
3Reliability
If relay UE transmits data to network via Uu interface, then connection reliability is improved, but power consumption increases
Solution Approach 1:
The relay UE acts as an intermediary that collects data from remote UEs via low-power sidelink communication and transmits it to the network via the Uu interface. This approach improves connection reliability by utilizing the established Uu interface while managing power consumption through efficient data aggregation and batching.
Data Source
AI summary
Provided are a method for performing wireless communication by a first device and a device supporting same. The method may comprise the steps of: receiving, from a second device, a first physical sidelink control channel (PSCCH) and a first physical sidelink shared channel (PSSCH) associated with the first PSCCH; receiving, from a third device, a second PSCCH and a second PSSCH associated with the second PSCCH; storing data received over the first PSSCH in a first buffer; storing data received over the second PSSCH in a second buffer; transmitting, to a base station, a scheduling request (SR) and/or a buffer status report (BSR) associated with the first buffer, on the basis that available data is in the first buffer; receiving information associated with a first resource from the base station as a response to the SR and/or BSR associated with the first buffer; and transmitting the data on the first buffer to a fourth device by means of the first resource.