Pre-Emptive Buffer Status Reporting for Multi-Parent Uplink Scheduling
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Solution Overview
Problem
Existing wireless communication systems face inefficiencies in scheduling Buffer Status Report (BSR) transmissions, particularly in multi-hop relay networks where efficient resource allocation is challenging due to complex parent node associations and varying channel conditions.
Innovation Solution
A method is introduced for transmitting Pre-emptive Buffer Status Reports (Pre-BSR) based on received BSRs, allowing for efficient scheduling by associating Logical Channels (LCHs) with specific parent nodes and configuring RLC channels to optimize data transmission in multi-connectivity scenarios.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If traditional BSR transmission scheduling is used in multi-hop relay networks, then resource allocation can be simplified, but transmission latency increases and resource allocation efficiency deteriorates
Solution Approach 1:
The patent applies preliminary action by transmitting the Pre-BSR before the actual data arrival is known to the parent node. When the child node receives a BSR from a further child node, it immediately generates and transmits a Pre-BSR to its parent node, anticipating the need for resource allocation. This allows the parent node to prepare scheduling decisions in advance, reducing transmission latency while maintaining manageable scheduling complexity through structured preprocessing of buffer status information.
2Productivity
If multi-connectivity with multiple parent nodes is implemented, then resource allocation efficiency improves, but system complexity increases
Solution Approach 1:
The patent applies segmentation by dividing the buffer status reporting into separate Pre-BSR transmissions for each parent node association. Each RLC channel is associated with specific parent nodes, and the Pre-BSR is segmented to include only the buffer status information relevant to each parent node's RLC channels. This segmentation approach enables efficient multi-connectivity resource allocation while reducing the complexity of parent node associations by localizing the information each parent node needs to process.
3Productivity
If RLC channels are associated with multiple parent nodes, then resource utilization improves, but scheduling difficulty increases
Solution Approach 1:
The patent applies local quality by providing each parent node with customized Pre-BSR information tailored to its specific RLC channel associations. The buffer status report is not uniformly distributed to all parent nodes but is selectively transmitted with only the relevant buffer status data for each parent node's associated RLC channels. This local quality approach improves resource utilization through multi-connectivity while maintaining scheduling ease by reducing the information processing burden on each parent node.
Data Source
AI summary
The present disclosure relates to methods and apparatuses. According to some embodiments of the disclosure, a method performed by a communication device, includes: receiving, at the communication device and from an access communication device, a Buffer Status Report (BSR) for uplink transmission to be carried by a plurality of Radio Link Control (RLC) channels, wherein the communication device is connected to at least two parent nodes; and transmitting a first Pre-emptive Buffer Status Report (Pre-BSR) based on the BSR to a first parent node of the at least two parent nodes after receiving the BSR.