Uplink Control Information Multiplexing in Mobile Communication Systems
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Solution Overview
Problem
Current mobile communication systems lack specific methods for efficiently mapping and transmitting uplink data and reception quality information simultaneously, leading to inefficiencies in resource utilization and potential delays in adaptive modulation and coding, which can result in suboptimal data transmission.
Innovation Solution
A mobile communication system where the mobile station calculates the number of symbols for reception quality information based on resource allocation information received from the base station, ensuring the information does not exceed or fall below a predefined value, and transmits this information together with uplink data using the uplink data channel, thereby reducing the need for control signals and minimizing delays.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If reception quality information is transmitted using dedicated control channels (PUCCH), then reliability of control information transmission is improved, but device complexity and resource overhead increase
Solution Approach 1:
The patent combines control information (reception quality information) and uplink data into a single transmission channel (PUSCH). The mobile station apparatus multiplexes control information with uplink data, allowing both to be transmitted together through the same physical channel, thereby simplifying the transmission structure while maintaining reliability
Solution Approach 2:
The uplink data channel (PUSCH) is designed to serve multiple functions: it can transmit both uplink data and control information (such as reception quality information). This multi-functionality eliminates the need for separate dedicated control channels, reducing system complexity while ensuring reliable control information transmission
2Manufacturing precision
If control signals are transmitted to specify mapping of uplink data and reception quality information, then transmission accuracy is improved, but loss of time increases due to additional signaling overhead
Solution Approach 1:
The mobile station apparatus autonomously determines the mapping between uplink data and control information based on pre-defined rules and resource allocation information, without requiring explicit control signals from the base station. This self-service approach eliminates signaling overhead and reduces delay while maintaining transmission accuracy
Solution Approach 2:
The mapping relationship between uplink data and control information is pre-defined and established in advance. When uplink resources are allocated, the mobile station apparatus automatically applies the predetermined mapping rules, eliminating the need for real-time control signaling and reducing transmission delay
3Measurement precision
If reception quality information is transmitted separately from uplink data, then measurement precision is improved, but productivity decreases due to additional transmission overhead
Solution Approach 1:
The patent merges control information (reception quality information) and uplink data into a single transmission process. The mobile station apparatus multiplexes these different types of information together in the PUSCH, maintaining the precision of reception quality measurements while improving overall transmission efficiency by reducing overhead
Data Source
AI summary
The amount of control information is reduced for specifying the transmission method for simultaneously transmitting the uplink data and the reception quality information as well as the uplink data and the ACK/NACK. In a mobile communication system where the base station apparatus allocates, to the mobile station apparatus, resources wherein the base station apparatus transmits, to the mobile station apparatus, control information for specifying a transmission format for the mobile station apparatus to transmit information using the uplink, while the mobile station apparatus simultaneously transmits, to the base station apparatus, the uplink data and the reception quality information based on the specified transmission format in case of having received the control information from the base station apparatus.