Terminal Delay Reporting Using Remaining Time for XR Uplink Allocation
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Solution Overview
Problem
Existing buffer status report (BSR) mechanisms in XR services do not adequately account for latency requirements, leading to potential data loss and quality of service (QoS) issues due to insufficient reporting of delay information, which can result in XR service exceeding its latency requirements.
Innovation Solution
A method and apparatus for reporting delay information, including a determining unit in terminal equipment to calculate a remaining time and transmit a delay information report, and a configuring unit in a network device to provide configuration information for determining the remaining time, ensuring timely resource allocation for XR services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal equipment uses the existing BSR mechanism to report buffer status, then the reporting process is simple and follows standard procedures, but the latency requirements of XR services are not met because delay information is not included in the report
Solution Approach 1:
The patent segments the buffer status report into two distinct parts: buffer size information and delay information. This is achieved by introducing a separate delay information report that contains the remaining time field, while the BSR continues to carry buffer size data. This segmentation allows each type of information to be reported through appropriate mechanisms, ensuring both buffer status and latency requirements are addressed without compromising either QoS fulfillment or time efficiency
Solution Approach 2:
The patent adds a new dimension to the reporting mechanism by introducing delay information (time dimension) to the existing buffer status reporting framework. The delay information report includes a remaining time field that indicates the time until a PDU set's delay budget is exhausted, adding temporal awareness to the traditional buffer status reporting and enabling the network to make latency-aware resource allocation decisions
2Ease of operation
If the terminal equipment triggers BSR based on logical channel priority without considering delay information, then the triggering mechanism remains simple and follows existing rules, but XR service latency requirements are exceeded because delay-critical data may not be reported timely
Solution Approach 1:
The patent implements preliminary action by having the terminal equipment calculate and report the remaining time (delay budget status) before the delay budget is fully consumed. The delay information report is triggered when data becomes available or when the remaining time indicates urgency, allowing the network to proactively allocate resources before latency requirements are violated, rather than reacting after the fact
3Device complexity
If the BSR includes only buffer size information without delay values, then the report structure remains simple and compatible with existing protocols, but the network cannot distinguish data urgency or allocate resources appropriately for latency-sensitive XR services
Solution Approach 1:
The patent segments the reporting function into two separate reports: the traditional BSR that maintains its simple structure for reporting buffer size, and a new delay information report that carries the remaining time field. This segmentation preserves the simplicity and compatibility of the BSR while adding the necessary delay information through a separate, dedicated reporting mechanism
Solution Approach 2:
The delay information report acts as an intermediary between the terminal equipment and the network device, carrying the remaining time information that enables the network to make informed resource allocation decisions. This intermediary structure allows the network to understand both the buffer status (from BSR) and the urgency (from delay information report) without complicating either individual report structure
Data Source
AI summary
An apparatus for reporting delay information, configured in a terminal equipment, includes: processor circuitry configured to determine a first remaining time; and a transmitter configured to transmit a delay information report to a network device, the delay information report including the first remaining time, and the processor circuitry triggers the delay information report in a case where the smallest value of remaining times of protocol data units at a packet data convergence protocol layer of the terminal equipment becomes lower than a configured threshold.