Message 3 Buffer MAC PDU Segmentation for Variable Uplink Grants
Solution Overview
Problem
In wireless communication networks, the management of medium access control protocol data units (MAC PDUs) in message 3 buffers is inefficient, particularly when the size of the uplink grant does not match the size of the MAC PDU, leading to suboptimal utilization of resources.
Innovation Solution
A method and apparatus for managing MAC PDUs in message 3 buffers involve obtaining the MAC PDU from the buffer, adjusting it to fit the uplink grant size by including MAC sub-protocol data units in subsequent transmissions, and utilizing a multiplexing and assembly entity to handle size mismatches.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If the size of the uplink grant does not match the size of the MAC PDU, then resource utilization becomes suboptimal, but strict size matching reduces flexibility in resource allocation
Solution Approach 1:
The MAC PDU is segmented into multiple MAC sub-PDUs that can be transmitted across multiple uplink grants. When the MAC PDU size exceeds the uplink grant size, the MAC entity divides the data into segments, each fitting within the granted resources, thereby optimizing resource utilization while maintaining allocation flexibility.
Solution Approach 2:
The system dynamically adapts MAC PDU transmission by adjusting the number of segments and their sizes based on the actual uplink grant received. Rather than requiring fixed size matching, the MAC entity dynamically determines segmentation parameters to fit variable grant sizes, resolving the contradiction between efficient resource use and allocation flexibility.
2Productivity
If MAC PDUs are strictly aligned with grant sizes, then transmission efficiency improves, but complexity of buffer management increases
Solution Approach 1:
The MAC entity performs preliminary segmentation of the MAC PDU into sub-PDUs before transmission, storing them in the Msg3 buffer. This preliminary action allows the system to maintain transmission efficiency by preparing segmented data that can be efficiently mapped to upcoming uplink grants, while avoiding complex real-time buffer management during actual transmission.
Data Source
AI summary
Apparatuses, methods, and systems are disclosed for using a medium access control protocol data unit in a message 3 buffer. One method includes, in response to a medium access control protocol data unit being in a message 3 buffer and receiving an uplink grant: obtaining the medium access control protocol data unit from the message 3 buffer; if a first size of the uplink grant does not match a second size of the medium access control protocol data unit: indicating to a multiplexing and assembly entity to include medium access control sub-protocol data units carrying medium access control service data units from the obtained medium access control protocol data unit in a subsequent uplink transmission; and obtaining the medium access control protocol data unit from the multiplexing and assembly entity.