MAC Layer PDU Priority Scheduling for Wireless Communication
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Solution Overview
Problem
Current wireless communication systems lack flexibility in resource allocation and data transmission, particularly at the MAC layer, which limits service quality, resource utilization, and the ability to handle different delay requirements, leading to inefficiencies in multiplexing services.
Innovation Solution
A method where a latter PDU is preferentially transmitted over a former PDU on resources indicated by a signaling, both being RLC layer PDUs, with the second PDU available for MAC layer transmission later, prioritizing the initial transmission of the second PDU, and using the same logical channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If data is transmitted according to arrival order at MAC layer, then implementation is simple, but flexibility and resource utilization are limited
Solution Approach 1:
The patent introduces dynamic priority adjustment mechanisms where the priority of PDUs is not fixed but can be changed based on transmission requirements. The system allows flexible priority assignment between PDUs arriving at different times, enabling adaptive resource allocation that responds to changing network conditions and service requirements.
Solution Approach 2:
The patent changes the parameter of PDU priority from a static attribute to a dynamic one. By allowing priority to be adjusted based on arrival time and transmission needs, the system transforms the simple arrival-order transmission into a flexible parameter-based selection mechanism, improving resource utilization while maintaining operational simplicity.
2Device complexity
If priority is assigned at logical channel level, then implementation is straightforward, but fine-grained control is lost
Solution Approach 1:
The patent segments the priority control from the logical channel level down to the PDU level. Instead of assigning uniform priority to all data at a channel level, the system individually manages priority for each PDU, enabling fine-grained control while keeping the overall structure simple through standardized priority assignment rules.
Solution Approach 2:
The patent applies local quality control by assigning different priorities to different PDUs based on their specific requirements. Each PDU receives appropriate priority treatment according to its characteristics (e.g., arrival time, service type), allowing precise control at the individual PDU level while maintaining system-wide simplicity.
3Reliability
If arrival order determines transmission priority, then fairness is maintained, but service quality for different delay requirements cannot be satisfied
Solution Approach 1:
The patent introduces feedback mechanisms where the system monitors PDU arrival times and transmission requirements. Based on this feedback, the system dynamically adjusts priority assignments to ensure both fairness (through consistent rules) and service quality (by meeting delay requirements), resolving the contradiction between maintaining fairness and satisfying diverse service needs.
Solution Approach 2:
The system dynamically adjusts transmission priority based on real-time conditions while maintaining fairness through standardized rules. The dynamic priority assignment allows the system to respond to varying service requirements without compromising fairness, as all PDUs are evaluated against the same criteria for priority determination.
Data Source
AI summary
A method and device for wireless communications, comprising receiving a first signaling, and the first signaling indicating a first uplink grant; preferentially transmitting a latter of a first PDU and a second PDU on resources of the first uplink grant indicated by the first signaling; wherein both the first PDU and the second PDU are PDUs of RLC layer; the second PDU later than the first PDU available for a transmission of MAC layer; and the meaning of the phrase of preferentially transmitting a latter of a first PDU and a second PDU comprises: in an initial transmission of the first PDU and an initial transmission of the second PDU, prioritizing the initial transmission of the second PDU; the first PDU and the second PDU use a same logical channel. The present application facilitates a better transmission of a first PDU and a second PDU through a first signaling.