Scheduling Request Transmission on Secondary Cell PUCCH
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Solution Overview
Problem
Current wireless communication systems face limitations in communication capacity, speed, flexibility, and efficiency, particularly when using multiple cells, as they often result in limited flexibility and efficiency in scheduling request procedures.
Innovation Solution
The method involves a user equipment (UE) and an evolved Node B (eNB) that utilize a Physical Uplink Control Channel (PUCCH) on both primary and secondary cells, with parameters like maximum scheduling request transmissions and periodicity, to optimize scheduling requests and resource allocation, allowing for flexible and efficient communication.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If scheduling requests are transmitted only on the primary cell, then device complexity is reduced, but communication flexibility and efficiency deteriorate
Solution Approach 1:
The patent segments the scheduling request transmission function across multiple cells (primary cell and secondary cell) rather than concentrating it on a single cell. This allows the UE to transmit scheduling requests on different cells based on configuration parameters, thereby improving communication flexibility while distributing the transmission load to avoid excessive complexity at any single point.
Solution Approach 2:
The patent introduces an additional dimension for scheduling request transmission by enabling transmission on both primary and secondary cells simultaneously or alternatively. This multi-cell dimension provides greater flexibility in resource allocation and scheduling request handling without significantly increasing overall system complexity.
2Productivity
If scheduling requests are transmitted on both primary and secondary cells, then communication efficiency is improved, but device complexity increases
Solution Approach 1:
The patent implements dynamic scheduling request transmission where the UE can adaptively select between primary cell and secondary cell based on configured parameters and current communication conditions. This dynamic approach improves communication efficiency by optimizing transmission paths while avoiding the need for complex static configurations for all possible scenarios.
Solution Approach 2:
The patent utilizes parameter-based configuration (sr-TransMax for primary cell, sr-TransMaxSCell for secondary cell) to control scheduling request transmission behavior. By changing these parameters, the system can optimize communication efficiency for different scenarios without hardcoding complex transmission logic, thereby managing device complexity through flexible parameter adjustment rather than structural complexity.
Data Source
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AI summary
A method by a user equipment (UE) is described. The method includes receiving a RRC message including a first parameter related to a maximum number of scheduling request transmission for a secondary cell, performing a scheduling request procedure based on the first parameter, and transmitting a scheduling request on a Physical Uplink Control Channel (PUCCH) on the secondary cell. The RRC message further includes a second parameter related to a maximum number of scheduling request transmission for a primary cell and the scheduling request procedure is performed further based on the second parameter.