System-Frame PDU-Set Delay Reporting for Wireless Nodes
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Solution Overview
Problem
Existing buffer status reporting mechanisms in wireless communication systems fail to meet the high-speed and low-latency requirements of XR services, leading to deviations in PDU-set delay budgets due to processing delays, radio delays, and retransmissions, affecting resource scheduling and QoS performance.
Innovation Solution
A method for reporting a PDU-set delay budget is introduced, using first signaling to determine a delay budget based on a system frame, which includes indicating a cut-off moment and data packet set, enhancing accuracy and reducing deviations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the UE reports a remaining PDU-set delay budget value, then the base station can perform resource scheduling, but the actual remaining PDU-set delay budget deviates from the reported value due to processing delay, radio delay, and retransmission
Solution Approach 1:
The patent applies preliminary action by having the UE report the initial PDU-set delay budget value in advance before actual transmission begins. This allows the base station to pre-calculate and pre-allocate resources, accounting for processing delays and radio delays beforehand, thus maintaining accuracy while enabling efficient scheduling.
Solution Approach 2:
The patent implements feedback by establishing a closed-loop mechanism where the UE reports delay budget information, the base station performs scheduling based on this feedback, and the system continuously monitors and adjusts resource allocation to compensate for processing and radio delays, ensuring the actual delay budget matches the reported value.
2Productivity
If the base station schedules uplink resources based on reported delay budget, then resource allocation can be performed, but the UE may discard data packets before scheduling or schedule after discard
Solution Approach 1:
The patent applies preliminary action by having the base station perform resource scheduling decisions in advance based on the reported PDU-set delay budget before actual data transmission occurs. This ensures that uplink resources are allocated ahead of time, preventing packet discard due to lack of resources while avoiding scheduling after packets have already been discarded.
Solution Approach 2:
The patent implements preliminary anti-action by proactively compensating for potential packet discard issues. The base station uses the reported delay budget to pre-allocate resources and set scheduling priorities that prevent packet discard, counteracting the harmful effect before it can occur during actual transmission.
3Ease of operation
If existing buffer status reporting mechanism is used, then data volume information can be provided, but it cannot meet the high-speed and low-latency requirements of XR services
Solution Approach 1:
The patent applies parameter changes by modifying the buffer status reporting mechanism to include the PDU-set delay budget value as an additional parameter. This enhancement allows the reporting mechanism to convey more information about service requirements, enabling the base station to prioritize XR traffic and meet high-speed, low-latency demands while maintaining the original simple reporting structure.
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. A communication node sends first signaling, wherein the first signaling is used for determining a first delay budget and the first delay budget depends on at least a first system frame, or the first signaling indicates a first moment and the first moment is a cut-off moment of a first delay budget; the first delay budget is a delay budget of a first data packet set; the first data packet set comprises at least one data packet, and each data packet in the first data packet set is a data packet on a MAC sub-layer; and a first system frame number is used for indicating the first system frame, and the first system frame number is an integer. With regard to delay budget reporting, the present application provides the solution of reporting a delay budget on the basis of a system frame or reporting a cut-off moment of a delay budget, and the solution can improve the resource scheduling performance and the QoS performance.