Buffer Size Table Indexing for Uplink Resource Allocation
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Solution Overview
Problem
The Buffer Status Report (BSR) mechanism in communication systems faces challenges such as frequent transmission, inaccuracy, and delay, especially with the growth of data volume and multiple users, affecting radio resource allocation and system performance, particularly for XR services.
Innovation Solution
A Buffer Size Reporting method that involves a user equipment (UE) receiving preset configurations of Buffer Size Tables (BSTs) from a network device, signaling an advanced BST indication to accurately inform the network device of target buffer sizes, allowing for efficient uplink resource allocation based on identified Buffer Size ranges.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the traditional BSR mechanism is used for uplink resource allocation, then the system can maintain basic operation with simple buffer status reporting, but the accuracy of buffer size indication is insufficient leading to inefficient resource allocation
Solution Approach 1:
The patent segments the buffer size indication into two parts: a Buffer Size Index (BSI) that points to a specific row in a pre-configured Buffer Size Table (BST), and an optional offset value that provides fine-grained adjustment. This segmentation allows the system to achieve high precision buffer size indication by combining coarse-grained table lookup with fine-grained offset adjustment, thereby resolving the contradiction between measurement precision and resource allocation efficiency.
Solution Approach 2:
The patent employs preliminary action by pre-configuring multiple Buffer Size Tables (BSTs) with different buffer size ranges and granularities through RRC signaling before actual buffer status reporting. The network device prepares these tables in advance, allowing the UE to efficiently indicate buffer size by simply selecting and signaling an index and offset, without requiring the network to process detailed buffer size calculations in real-time, thus improving both precision and efficiency.
2Adaptability or versatility
If multiple Buffer Size Tables are configured for different service types, then the adaptability to diverse services (e.g., XR, eMBB, URLLC) is improved, but the device complexity increases due to multiple configuration and selection mechanisms
Solution Approach 1:
The patent implements universality by designing a unified Buffer Size Table configuration framework that can serve multiple service types (XR, eMBB, URLLC, etc.) through a single RRC configuration structure. The same BST configuration mechanism and BSR reporting procedure are universally applied across different service types, with the flexibility to configure different table parameters. This universal framework reduces device complexity while maintaining high adaptability to diverse services.
Solution Approach 2:
The patent applies local quality by allowing different Buffer Size Tables to be configured with service-specific characteristics (different buffer size ranges, granularities, and thresholds) while maintaining a unified configuration structure. Each service type can have its optimized BST parameters locally adjusted without affecting the overall configuration management mechanism, enabling service-specific adaptability with minimal increase in device complexity.
3Speed
If frequent BSR transmission is performed to capture dynamic buffer status changes, then the responsiveness to buffer status changes is improved, but the signaling overhead and system resource consumption increase
Solution Approach 1:
The patent employs parameter changes by transforming the buffer size indication from direct binary representation to an index-based representation with offset. This parameter transformation allows the system to report buffer status changes more efficiently: small changes can be indicated by simple offset adjustments without changing the BSI, while large changes are captured by BSI updates. This reduces the frequency and volume of BSR transmissions needed to capture dynamic buffer status, thereby improving responsiveness while reducing signaling overhead and energy consumption.
Data Source
AI summary
A BSR method, adapted for UE is provided, including: receiving one or more preset configurations of one or more Buffer Size Tables (BSTs) from a network device, wherein the one or more BSTs are candidate BSTs to be selected as the target BST to the LCG; and in response to identifying the target BST used for the LCG, signalling an advanced BST indication to the network device, wherein the advanced BST indication is configured to record an advanced BST index and at least one of following information: a target LCID, and a target eLCID, wherein the network device queries a target Buffer Size (BS) range in the target BST according to the received advanced BST indication, and the network device grants a UL resource for the LCG based on the target BS range, wherein the target BS range is identified by a BS index of the target BST.