Wireless Terminal Transmission Count Adjustment via PDCCH Aggregation
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in managing transmission counts and bundling patterns for consecutive data transmissions, leading to increased signaling and suboptimal resource utilization due to the need for direct notification of transmission parameters.
Innovation Solution
A wireless communications system where a terminal adjusts its transmission count based on the radio resource count received from a base station, allowing for variable transmission counts, RTT, and TTI bundling patterns without direct notification, by associating these parameters with the aggregation level of the downlink control channel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If direct notification of transmission parameters is used, then transmission count management is achieved, but signaling overhead increases
Solution Approach 1:
The terminal autonomously determines the transmission count by monitoring the aggregation level of its own PDCCH receptions, without requiring the base station to explicitly signal the transmission count. The terminal serves itself by using its received control channel characteristics to derive the transmission parameter.
Solution Approach 2:
The patent changes the parameter used for transmission count indication from explicit signaling to the aggregation level of the PDCCH. By associating the transmission count with the aggregation level parameter, the system eliminates the need for separate transmission count signaling while maintaining accurate control.
2Productivity
If fixed transmission count is used, then system complexity is reduced, but communication efficiency deteriorates
Solution Approach 1:
The transmission count is made dynamic and adaptable to channel conditions through the aggregation level. When channel conditions are poor, the aggregation level increases, which automatically increases the transmission count to ensure reliable delivery. When conditions improve, the aggregation level and transmission count decrease, optimizing resource usage.
3Measurement precision
If explicit parameter notification is used, then transmission control precision is improved, but resource utilization deteriorates
Solution Approach 1:
The aggregation level of the PDCCH serves multiple functions simultaneously: it provides control channel robustness for reliable decoding and indicates the transmission count for HARQ operations. This multi-functionality eliminates the need for separate signaling resources while maintaining precise transmission control.
Data Source
AI summary
A wireless communications system includes a terminal configured to adjust a transmission count of consecutive transmissions of a same data to a base station, based on a radio resource count of radio resources assigned to the terminal, among plural radio resources of a control channel received from the base station; and the base station configured to identify the transmission count based on the radio resource count of the radio resources assigned to the terminal among the plural radio resources of the transmitted control channel, and receive the same data consecutively transmitted by the terminal, based on the identified transmission count.