Wireless Communication Node SR Timer Control for XR Buffer Reports
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Solution Overview
Problem
The existing buffer status reporting mechanism in wireless communication systems fails to meet the high data rate and low latency requirements of XR services, leading to packet loss and increased transmission delays.
Innovation Solution
A buffer status reporting solution that differentiates between first-type and second-type buffer status reports, adjusting timer settings and prioritizing SR transmissions based on specific conditions to optimize resource allocation and reduce delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of time
If the existing buffer status reporting mechanism is used, then the system complexity is low, but the transmission delay increases and packet loss occurs for XR services
Solution Approach 1:
The patent segments the buffer status reporting mechanism into two distinct types: regular BSR for general data traffic and XR-specific BSR for extended reality services. This segmentation allows the XR-BSR to carry additional information fields (such as XR service identification, packet dependency relationships, and priority indicators) without burdening the general-purpose reporting mechanism, thereby reducing transmission delay for time-sensitive XR packets while maintaining simplicity for other traffic types.
Solution Approach 2:
The patent implements preliminary action by pre-configuring XR-specific buffer status report formats and priority handling rules before XR traffic arrives. The network device is pre-equipped with knowledge of XR service characteristics, allowing it to immediately prioritize XR packets upon receipt without requiring complex real-time analysis, thus reducing transmission delay while keeping the mechanism straightforward.
2Reliability
If the existing buffer status reporting mechanism is used, then the implementation is simple, but packet loss occurs due to inability to prioritize critical data packets
Solution Approach 1:
The patent applies local quality by endowing specific portions of the buffer status reporting mechanism with enhanced capabilities tailored to XR services. The XR-BSR format includes dedicated fields for indicating packet dependency relationships and service priorities, allowing the network to identify and protect critical packets (such as those containing essential depth or texture information) from discards during buffer overflow conditions, thereby improving reliability without requiring complete redesign of the reporting mechanism.
Solution Approach 2:
The patent implements feedback mechanisms where the buffer status reports provide detailed information about packet dependencies and service types back to the network scheduler. This feedback enables the scheduler to make informed decisions about which packets to retain or discard, prioritizing those critical for XR service quality, thus improving packet delivery reliability while maintaining manageable system complexity through structured information exchange.
3Speed
If the existing buffer status reporting mechanism is used, then the resource allocation is generic, but transmission delays increase due to inability to prioritize XR traffic
Solution Approach 1:
The patent implements dynamics by making the buffer status reporting mechanism adaptable to different service types. The system dynamically selects between regular BSR and XR-specific BSR formats based on the traffic type, and the network scheduler dynamically adjusts resource allocation priorities based on the service identification information carried in the reports. This allows high-speed transmission for XR traffic while keeping the overall mechanism flexible rather than permanently complex.
Solution Approach 2:
The patent applies parameter changes by introducing new parameters in the XR-BSR format (service type indicators, priority levels, dependency relationships) that enable differentiated resource allocation. These parameter changes allow the network to identify XR traffic and allocate resources with higher priority, increasing transmission speed for critical data without requiring fundamental changes to the existing reporting infrastructure.
4Reliability
If data packets with dependency relationships are discarded due to buffer overflow, then buffer management is simple, but service quality deteriorates due to loss of critical XR data
Solution Approach 1:
The patent implements preliminary action by pre-marking critical data packets with dependency information and priority indicators before they enter the buffer. When buffer overflow occurs, the system can immediately identify and protect these pre-marked critical packets without requiring complex real-time analysis of packet relationships, thus maintaining service quality while keeping buffer management relatively simple through pre-established prioritization rules.
Data Source
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AI summary
Disclosed in the present application are a method and apparatus used in a communication node for wireless communication. The method comprises: a communication node receiving first signaling, wherein the first signaling indicates a first time length of a first timer; triggering a first SR as a response to a first buffer status report being triggered; sending a first SR signal; and as the first SR signal is sent, starting the first timer only when the first buffer status report is the former one of a first-type buffer status report and a second-type buffer status report, or, as the first SR signal is sent, starting the first timer, and setting the first timer to the first time length only when the first buffer status report is the former one of the first-type buffer status report and the second-type of buffer status report, wherein the running state of the first timer is used for determining whether to send an SR signal for the first SR, the first-type buffer status report comprises a regular BSR, and the second-type buffer status report is different from the first-type buffer status report.