MAC PDU Processing for Uplink Control Information Updates
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Solution Overview
Problem
In wireless communication systems, terminals face challenges in reporting the latest uplink control information when uplink resource conflicts force organized MAC PDUs to be transmitted on subsequent resources.
Innovation Solution
The method involves determining preorganized MAC PDUs that need to be transmitted on subsequent resources and updating the content of the MAC control element (MAC CE) in the corresponding MAC subPDUs with the latest uplink control information, ensuring the length and structure of the MAC subPDUs remain unchanged.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the terminal transmits the preorganized MAC PDU on the original uplink resource, then the transmission resource is utilized efficiently, but the uplink control information becomes outdated due to resource conflict
Solution Approach 1:
The terminal pre-organizes the MAC PDU structure in advance on the original uplink resource, preserving the resource allocation efficiency. When resource conflict occurs, the terminal updates the MAC CE content with latest control information before transmission, ensuring accuracy without requiring complete reorganization. This preliminary preparation combined with selective updating resolves the contradiction between resource efficiency and information accuracy.
Solution Approach 2:
The terminal changes the content parameters of the MAC CE (Buffer Status Report, Power Headroom Report) while maintaining the same MAC PDU structure and length. This allows the terminal to transmit accurate latest control information without changing the transmission resource or structure, thus resolving the conflict between using original resources and reporting latest information.
2Reliability
If the terminal reorganizes the MAC PDU to include latest control information, then the uplink control information is current, but the data organization complexity increases
Solution Approach 1:
The terminal extracts only the MAC CE portion of the MAC PDU that needs updating (Buffer Status Report, Power Headroom Report), updates this specific part with latest control information, and keeps the rest of the MAC PDU structure unchanged. This selective extraction and updating approach maintains timeliness while minimizing reorganization complexity.
Solution Approach 2:
The terminal segments the MAC PDU into distinct parts: the MAC CE section containing control information and the data section. By segmenting the structure, the terminal can update only the necessary MAC CE part without reorganizing the entire MAC PDU, thus reducing complexity while ensuring control information timeliness.
3Reliability
If the terminal updates the MAC CE content in the preorganized MAC PDU, then the latest control information is reported, but the processing overhead increases
Solution Approach 1:
The terminal performs preliminary organization of the MAC PDU structure in advance, including pre-allocation of MAC CE fields. When updates are needed, only the content of existing fields needs modification rather than complete reconstruction, thus maintaining report accuracy while reducing processing overhead through advance preparation.
Solution Approach 2:
The terminal copies the existing MAC PDU structure and selectively updates the MAC CE content fields (BSR, PHR) with latest control information. This copying approach preserves the validated structure while minimizing processing to only the necessary content fields, balancing accuracy and processing efficiency.
Data Source
AI summary
Embodiments of the present disclosure provide a medium access control protocol data unit (MAC PDU) processing method, a terminal and a medium. The method includes: a terminal determining a preorganized MAC PDU that needs to be transmitted on a subsequent resource; updating, with latest uplink control information, content of a media access control control element (MAC CE) in an MAC subPDU corresponding to the MAC CE in the preorganized MAC PDU.