IAB Node BSR Transmission via RLC and Adaptation Layer Mapping
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Solution Overview
Problem
In wireless communication systems, particularly in Integrated Access and Backhaul (IAB) nodes, there is a challenge in efficiently transmitting buffer status reports (BSR) due to limited resources and the need to manage data volumes across multiple layers, including the Radio Link Control (RLC) and adaptation layers, which affects latency and data transmission efficiency.
Innovation Solution
The method involves generating a BSR that considers the data volume of the IAB node by incorporating data from the RLC layer entities and the adaptation layer, specifically utilizing a configuration with a receiving part and a transmitting part, including reception and transmission buffers, to determine the data volume for accurate reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the BSR includes data volume from both RLC layer entities and adaptation layer, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The IAB node is segmented into distinct functional parts: a receiving part with reception buffer for downlink data and a transmitting part with transmission buffer for uplink data. This segmentation allows independent measurement of data volumes at different layers (RLC and adaptation layers) without requiring the entire system to handle all measurements simultaneously, thus improving measurement precision while managing complexity through modular architecture
Solution Approach 2:
The patent introduces an intermediary mechanism that maps between transmission buffers and reception buffers at the adaptation layer. This intermediary layer enables accurate tracking of data volume by establishing correspondence relationships between buffers, allowing the BSR to accurately reflect total data volume without requiring direct complex interactions between all RLC entities and adaptation layer components
2Productivity
If the IAB node manages data volume across multiple layers (RLC and adaptation), then productivity is improved, but loss of time increases
Solution Approach 1:
The IAB node performs preliminary actions by maintaining and updating buffer status information at both the RLC layer and adaptation layer in advance. The mapping relationship between transmission and reception buffers is established beforehand, enabling the node to quickly generate accurate BSR reports when needed, thus improving productivity without incurring additional latency during actual data transmission
Solution Approach 2:
The patent implements a feedback mechanism where the BSR reports containing aggregated data volume information from multiple layers are continuously transmitted to the network. This feedback enables the network to make informed scheduling decisions, optimizing resource allocation and improving overall productivity while the continuous feedback loop helps identify and address latency issues promptly
Data Source
AI summary
The present invention relates to a method of transmitting a buffer status report (BSR) by an Integrated Access and Backhaul (IAB) node in a wireless communication system. In particular, the method includes the steps of: generating the BSR; and transmitting the BSR to the network, wherein the BSR includes data volume of the IAB node determined by considering data volume of at least one RLC (Radio Link Control) layer entity of the IAB node and data volume of an adaptation layer of the IAB node.