Uplink Control Channel Format Mismatch in Radio Base Stations
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Solution Overview
Problem
The existing method for sending ACK or NACK information as a response to downlink data in radio communication systems often results in a mismatch between the expected and actual uplink data format, leading to improper reception of uplink data by the radio base station.
Innovation Solution
The solution involves performing error detection coding and forward error correction coding on both downlink scheduling information and UL allocation grant as a unit, ensuring that the mobile station receives and sends uplink data in a standardized format, thereby avoiding format mismatches and ensuring proper reception by the radio base station.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the mobile station sends ACK or NACK information multiplexed with uplink data via PUSCH, then the response to downlink data can be transmitted, but the uplink data format may not match the format expected by the radio base station, leading to improper reception
Solution Approach 1:
The radio base station performs preliminary encoding on the uplink data by applying error detection coding and forward error correction coding before transmission. This preliminary processing ensures that the encoded data format is standardized and will be properly recognized during reception, preventing format mismatch issues.
Solution Approach 2:
The patent changes the parameter of data encoding by introducing a two-stage coding process: first error detection coding, then forward error correction coding. This parameter change transforms the raw uplink data into a standardized encoded format that ensures proper reception at the base station.
2Adaptability or versatility
If separate error detection coding is performed on downlink scheduling information and UL allocation grant, then each can be decoded independently, but the mobile station may fail to detect downlink scheduling information while successfully detecting UL allocation grant, causing format mismatch
Solution Approach 1:
The patent merges the encoding of downlink scheduling information and UL allocation grant into a unified two-stage coding process. Both types of control information undergo the same error detection coding followed by the same forward error correction coding, ensuring format consistency across different control messages.
Solution Approach 2:
The patent applies the same encoding parameters (error detection coding followed by forward error correction coding) to both downlink scheduling information and UL allocation grant. This parameter standardization ensures that regardless of which message is successfully detected, the format will be consistent and properly recognized.
Data Source
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AI summary
A mobile station, for performing radio communication with a radio base station, comprises: an information generation section which generates information indicative of a result of error detection on a downlink signal received; and an information area securing section which secures an area for sending the information to the radio base station in a physical uplink shared channel regardless of whether the downlink signal is received.