Relay Node Buffer Status Reporting for Wireless Communication
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Solution Overview
Problem
In relay wireless communications, changes in node mobility or channel conditions lead to significant changes in buffered data volume at relay nodes, causing packet loss and radio resource waste if not timely reported to the base station, and there is a need for rapid radio connection recovery in Dual-Connectivity scenarios where the secondary cell lacks RRC function.
Innovation Solution
Implementing a method for the relay node to trigger a Buffer Status Report (BSR) when the buffered data volume exceeds a threshold, and using layer 2-based rapid radio connection recovery through the user-plane of the secondary cell to assist in control-plane message transmission during connection failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If relay nodes forward data from multiple source nodes to multiple remote nodes, then network coverage and throughput are improved, but the buffered data volume changes significantly due to node mobility and channel changes, causing packet loss and radio resource waste
Solution Approach 1:
The patent implements a feedback mechanism where the relay node continuously monitors its buffer status and sends Buffer Status Reports (BSR) to the base station when the buffer size exceeds a threshold. This feedback allows the base station to adjust scheduling decisions in real-time, preventing packet loss by ensuring the base station is aware of accumulated data at the relay node and can allocate appropriate radio resources.
2Productivity
If relay nodes buffer data for future transmission, then radio resource utilization is improved, but the base station loses accurate information about the actual buffered data volume, leading to scheduling inefficiency
Solution Approach 1:
The relay node implements a feedback mechanism by sending Buffer Status Reports (BSR) to the base station when its buffer size exceeds a configured threshold. This feedback provides the base station with accurate, up-to-date information about the buffered data volume at the relay node, enabling efficient scheduling decisions while maintaining high radio resource utilization.
3Device complexity
If the secondary cell lacks RRC function, then device complexity is reduced, but rapid radio connection recovery becomes difficult when connection failure occurs
Solution Approach 1:
The patent introduces a master base station as an intermediary that assists the secondary base station (which lacks RRC function) in rapid connection recovery. When connection failure occurs, the user equipment can request assistance from the master base station, which has the capability to facilitate quick reconnection through the secondary base station, thus maintaining reliability without adding RRC complexity to the secondary cell.
Data Source
AI summary
The present application provides a method and device for sidelink wireless communications. A first node receives a first signaling via an air interface; as a response to receiving the first signaling, transmits a first radio signal, the first radio signal comprises a second signaling; receives a second data unit set via an air interface; herein, the second signaling indicates that a first data unit set is not received, and both the first data unit set and the second data unit set are transmitted through a first radio bearer; the second signaling is used to determine the second data unit set; a transmitter of the first signaling is non-co-located with a receiver of the first radio signal; the first data unit set comprises at least one data unit; the second data unit set comprises the first data unit set. The present application can effectively reduce data retransmission.