Dynamic Buffer Status Reporting for Extended Reality Services
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Solution Overview
Problem
Current buffer status reporting systems in wireless networks for extended reality services face inefficiencies due to inaccurate buffer size indications, leading to resource wastage and suboptimal resource allocation, especially with variable packet arrival rates and sizes.
Innovation Solution
Implementing a mechanism that dynamically switches between two tables of buffer size levels, one with 5-bit and one with 8-bit buffer size fields, based on network indications, to provide finer granularities and adapt to varying traffic conditions, ensuring accurate resource allocation for extended reality services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a single buffer size table is used for BSR reporting, then the system complexity is low, but the buffer size indication accuracy is insufficient for variable XR traffic
Solution Approach 1:
The patent implements dynamic switching between two buffer size tables (first table with 5-bit field, second table with 8-bit field) based on network conditions and traffic characteristics. The network can indicate which table to use via RRC signaling or MAC CE, allowing the BSR mechanism to adapt to varying XR traffic patterns while maintaining manageable system complexity through standardized switching procedures
Solution Approach 2:
The patent changes the buffer size field length parameter from a fixed value to a variable value that can be 5 bits or 8 bits depending on the indicated table. This parameter change enables finer granularity (8-bit provides 256 levels vs 5-bit providing 32 levels) when needed for accurate XR traffic representation, while allowing coarser granularity when sufficient, thus resolving the contradiction between accuracy and complexity
2Measurement precision
If a longer buffer size field (8-bit) is always used, then the buffer size indication accuracy is high, but the uplink signaling overhead increases
Solution Approach 1:
The patent dynamically changes the buffer size field length parameter between 5 bits and 8 bits based on network indications and traffic conditions. When XR traffic requires fine granularity, the 8-bit field is activated; otherwise, the more compact 5-bit field is used, thereby reducing uplink signaling overhead while maintaining accuracy when needed
Solution Approach 2:
Instead of always using the full 8-bit buffer size field, the patent applies partial action by using only 5 bits when sufficient granularity is adequate. This reduces the signaling overhead (fewer uplink resources consumed) while still providing accurate buffer status reporting for many XR traffic scenarios, reserving the full 8-bit capability for when it is truly necessary
3Quantity of substance
If a shorter buffer size field (5-bit) is used, then the uplink signaling overhead is reduced, but the buffer size indication accuracy is insufficient for fine-grained traffic control
Solution Approach 1:
The patent implements a dynamic BSR mechanism that switches between 5-bit and 8-bit buffer size fields based on real-time network conditions and XR traffic characteristics. When fine-grained accuracy is required for precise traffic control, the system transitions to the 8-bit field; otherwise, it operates with the more efficient 5-bit field, thus resolving the contradiction between overhead reduction and accuracy maintenance
Solution Approach 2:
The patent creates a universal BSR reporting mechanism that can function with both 5-bit and 8-bit buffer size fields within the same system framework. The network can indicate which mode to use via standardized signaling (RRC or MAC CE), allowing the system to universally support both low-overhead operation and high-precision reporting as needed for different XR service requirements
4Productivity
If buffer status reporting is optimized for fixed traffic patterns, then the resource allocation efficiency is high for specific services, but the adaptability to varying XR traffic characteristics is reduced
Solution Approach 1:
The patent implements dynamic adaptability by allowing the network to indicate which buffer size table (5-bit or 8-bit) should be used based on current XR traffic characteristics and service requirements. This enables the resource allocation mechanism to adapt to varying traffic patterns (packet arrival rates, packet sizes, jitter) while maintaining high efficiency through standardized switching procedures and pre-configured tables
Solution Approach 2:
The patent changes the buffer size reporting granularity parameter dynamically between two discrete levels (5-bit and 8-bit fields) based on XR traffic characteristics. This parameter change allows the system to optimize resource allocation efficiency for different service types and traffic conditions while maintaining versatility across varying XR applications, resolving the contradiction between efficiency and adaptability
Data Source
AI summary
Various aspects of the present disclosure relate to buffer status reporting for extended reality service. An apparatus is configured to receive an indication of whether a first buffer status report (“BSR”) format is usable. In response to the indication indicating that the first BSR format is usable, determine a buffer size based on a first table that comprises buffer size levels corresponding to a first buffer size field. In response to the indication indicating that the first BSR format is not usable, determine the buffer size based on a second table that comprises buffer size levels corresponding to a second buffer size field, and transmit the BSR.