Joint Polar Coding of Multi-User Control Channels

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Solution Overview

Problem

Current wireless communication networks face challenges in efficiently transmitting polar coded control information for multiple users due to limitations in error correction and coding gain, particularly in noisy channels, which affects the reliability and efficiency of control data transmission.

Innovation Solution

The implementation of joint polar encoding for control information from multiple users, where individual and group CRCs are used to create a large block size for polar coding, enhancing error correction performance and coding gain by combining control information from multiple users into a single polar code block.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Device complexity

If separate encoding is used for control information of each user, then device complexity is reduced, but error correction performance deteriorates

Engineering Contradiction:

Improveencoding complexityVSAvoiderror correction performance

Core Design Contradiction:

Device complexityVSReliability

Solution Approach 1:

The patent combines control information from multiple users into a single joint codeblock for polar encoding. This merging approach increases the codeblock size, which improves error correction performance by providing better coding gain, while the polar encoding structure maintains manageable complexity through systematic construction

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If joint polar encoding for multiple users is implemented, then error correction performance is improved, but device complexity increases

Engineering Contradiction:

Improveerror correction performanceVSAvoidencoding complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

The patent changes the parameter of codeblock size by jointly encoding multiple users' control information together. This parameter change increases the block length, which improves polar code performance due to better coding gain, while the structured approach to joint encoding keeps complexity manageable

Inventive Principle:

Principle #35Parameter changes

3Reliability

If larger block size is used for polar coding, then coding gain is improved, but processing time increases

Engineering Contradiction:

Improvecoding gainVSAvoidprocessing time

Core Design Contradiction:

ReliabilityVSLoss of time

Solution Approach 1:

The patent performs preliminary actions by collecting and combining control information from multiple users before polar encoding. This preliminary combination creates a larger codeblock that achieves better coding gain, while the structured joint encoding process prepares the data in advance to optimize processing efficiency

Inventive Principle:

Principle #10Preliminary action

Data Source

PatentEP3552314B1Efficient control channel design using polar codes

Publication Date: 2023.03.29 QUALCOMM INC

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AI summary

Aspects of the disclosure relate to wireless communication systems configured to provide techniques for multiplexing dedicated control information for a plurality of users in a single information block and polar coding the information block to produce a polar code block of dedicated control information for transmission over a wireless air interface. The information block may further include group cyclic redundancy check (CRC) information for the information block and individual CRC information for each dedicated control information.