BSR MAC CE Switching for Precise XR Buffer Status Reporting
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Solution Overview
Problem
Existing buffer status reporting (BSR) mechanisms in telecommunication networks are inadequate to handle the unique characteristics of XR services such as periodicity, multiple flows, and low latency requirements, particularly when multiple logical channels and buffer size tables are involved.
Innovation Solution
A mechanism is introduced where terminal devices can be configured to use either a first or second type of BSR MAC CE for reporting buffer status of logical channel groups (LCGs), with the type indicated by a logical channel identifier (LCID), allowing for the coexistence of legacy and new buffer size tables, and enabling finer granularity reporting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing BSR mechanisms are used, then legacy compatibility is maintained, but XR service requirements (periodicity, multiple flows, low latency) cannot be accommodated
Solution Approach 1:
The patent segments the BSR mechanism into two distinct types: legacy BSR MAC CE for traditional services and new BSR MAC CE for XR services. This segmentation allows each type to be optimized for its specific service requirements without compromising the other, enabling XR services to utilize features like periodic reporting and multiple buffer size tables while legacy services continue to use the established mechanism.
Solution Approach 2:
The patent applies local quality by configuring different BSR MAC CE types for different logical channel groups (LCGs) based on service requirements. XR services can be assigned to LCGs that use the new BSR MAC CE format with enhanced features, while other services continue using legacy formats, allowing localized optimization for specific service characteristics.
2Measurement precision
If multiple buffer size tables are introduced for XR services, then reporting precision is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic buffer size table selection where the appropriate buffer size table is chosen based on the service type and QoS requirements. The system can dynamically switch between different buffer size tables (e.g., first buffer size table for legacy services, second buffer size table for XR services) depending on the logical channel group configuration, allowing precision optimization without requiring all tables to be active simultaneously.
Solution Approach 2:
The patent changes the parameter of buffer size quantization by introducing multiple buffer size tables with different granularity levels. The new BSR MAC CE format supports selection of appropriate buffer size tables based on service requirements, enabling finer granularity reporting for XR services while maintaining coarser granularity for legacy services, thus improving precision where needed without uniformly increasing complexity.
3Loss of time
If new BSR MAC CE types are configured for XR services, then latency requirements are met, but processing overhead increases
Solution Approach 1:
The patent implements periodic BSR reporting for XR services using the new BSR MAC CE format, where reports are transmitted at configured intervals rather than only when triggered by buffer changes. This periodic action ensures timely status updates for latency-sensitive XR services while the network can configure appropriate periods to balance latency requirements against processing overhead.
Data Source
AI summary
Embodiments of the present disclosure relate to devices, methods, apparatuses and computer readable storage media of BSR. The method comprises obtaining a configuration at least for a first type of BSR MAC CE and for a second type of BSR MAC CE, the configuration defining at least that: either one of the BSR MAC CE types may be used to report buffer status of a LCG, wherein a LCG ID refers to the LCG for which the buffer status is reported, and a LCID of the BSR MAC CE indicates the type of the BSR MAC CE used for reporting the buffer status of the LCG; and transmitting at least one type of BSR MAC CE to a network device based on the configuration.