Periodic Low-Latency Service Signaling for Uplink Resource Pre-Allocation
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Solution Overview
Problem
The existing buffer status report (BSR) mechanism in wireless communication standards does not satisfy the latency requirements of periodic low-latency services in IEEE802.11be, particularly for services like TSN data, AR/VR, and interactive video, due to inadequate granularity in queue size and resource allocation.
Innovation Solution
A communication method where stations and access points exchange message frames containing information about periodic low-latency services, including size, interval, and resource needs, allowing for pre-allocation of uplink resources to meet strict latency requirements, and supporting multi-link devices across various frequency bands.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the existing buffer status report (BSR) mechanism is used for resource allocation, then the resource allocation process is simple, but it cannot satisfy the latency requirements of periodic low-latency services
Solution Approach 1:
The patent segments the resource allocation mechanism into two parts: the existing BSR mechanism for general traffic and a new periodic buffer status report (P-BSR) mechanism specifically for periodic low-latency services. This segmentation allows the P-BSR to handle latency-sensitive periodic traffic with dedicated reporting intervals and formats, while the original BSR continues to manage other traffic types, thus satisfying latency requirements without completely redesigning the resource allocation system
Solution Approach 2:
The patent implements preliminary action by introducing periodic buffer status reporting where stations proactively report their buffer status at predetermined intervals before data transmission is needed. This allows the access point to pre-allocate uplink resources for periodic low-latency services in advance, ensuring that resources are ready when needed and latency requirements are met, rather than waiting for on-demand BSR reports
2Loss of time
If on-demand buffer status reporting is used, then the resource allocation responds to actual needs, but it causes latency for periodic low-latency services
Solution Approach 1:
The patent applies periodic action by implementing periodic buffer status reporting where stations report their buffer status at fixed intervals determined by a periodic interval parameter. This periodic reporting ensures that the access point receives timely status updates for periodic low-latency services without waiting for data arrivals, enabling proactive resource allocation that meets latency requirements while maintaining reasonable reporting frequency to avoid excessive overhead
3Reliability
If fine-grained resource allocation is implemented for periodic services, then latency requirements are met, but the signaling overhead increases
Solution Approach 1:
The patent applies local quality by designing a specialized P-BSR report format with specific fields (periodic interval, number of transmissions, size) tailored for periodic low-latency services. This localized optimization allows compact encoding of periodic service parameters without requiring detailed reporting for all traffic types, thus providing fine-grained resource allocation for periodic services while minimizing overall signaling overhead by applying detailed reporting only where needed
Data Source
AI summary
A communication method includes: determining a first message frame, where the first message frame includes information related to a periodic low-latency service, and the information is configured to indicate the periodic low-latency service sent by a station; and sending the first message frame.