Transport Format Selection for Radio Systems
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Solution Overview
Problem
In radio systems, the selection of transport channel parameters without knowledge of the receiver type used in Node B reception can lead to non-optimal data transfer performance, as different receivers require different effective coding rates for optimal operation.
Innovation Solution
A method is introduced where the base station provides information on its reception type, and a controller generates multiple transport format combination sets with varying effective coding rates, allowing user equipment to select the optimal set based on the reception type and coding rates for improved performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single transport format combination set is used without knowledge of receiver type, then device complexity is reduced, but data transfer performance becomes non-optimal
Solution Approach 1:
The patent segments the transport format combination sets into multiple distinct sets, each optimized for specific receiver types (Rake receiver vs. advanced receiver). The user equipment is provided with multiple TFCSs and selects the appropriate one based on the detected receiver type, thereby resolving the contradiction between using a single simple configuration and achieving optimal performance for different receiver architectures.
2Productivity
If multiple transport format combination sets with different effective coding rates are provided, then data transfer performance is optimized for different receiver types, but device complexity increases
Solution Approach 1:
The patent changes the effective coding rate parameter across different transport format combination sets to match the requirements of different receiver types. By providing multiple TFCSs with varying effective coding rates and enabling the user equipment to select based on receiver type, the system optimizes data transfer performance without requiring complex real-time adjustments, thus managing device complexity effectively.
3Ease of operation
If transport formats are selected without receiver type information, then ease of operation is improved, but reliability of data transfer deteriorates
Solution Approach 1:
The patent introduces a feedback mechanism where the user equipment detects the receiver type used by the base station and provides this information back to the network. Based on this feedback, the appropriate transport format combination set is selected and configured. This feedback loop ensures that the correct transport formats are used for the specific receiver type, maintaining both ease of operation and high reliability of data transfer.
Data Source
AI summary
There is provided a method of selecting transport channel parameters and a radio system comprising user equipment communicating with at least one base station and a controller for controlling the communication between the user equipment and the base station. The base station comprises means for providing information on the type of reception used in the base station, the controller comprises means for generating more than one transport format combination set, TFCS, the TFCSs having different effective coding rates, ECR, for different data rates used in the radio system, and means for selecting a specific TFCS to be used by the user equipment on the basis of the type of reception used in the base station and the effective coding rates of the more than one TFCS, and the user equipment comprises means for using the specific TFCS based on the selection of the controller.