Control Information Repetition in Wireless Communication
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Solution Overview
Problem
Existing wireless communication systems face challenges in effectively providing services, particularly in ensuring reliable and low-latency transmission of control information, especially in 5G communication systems used for IoT applications.
Innovation Solution
The method involves a user equipment (UE) receiving a control information repetition configuration from a base station (BS), which includes a repetition level parameter indicating the number of repeatedly transmitted control resource sets (CORESETs). The UE then performs blind decoding on the repeatedly transmitted CORESETs based on this configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control information is transmitted using traditional single transmission method, then device complexity is low, but reliability of control information transmission is insufficient
Solution Approach 1:
The control information transmission is segmented into multiple independent transmissions (repeated CORESETs) rather than a single transmission. Each repetition can be independently decoded, increasing the probability that at least one transmission succeeds, thereby improving reliability without requiring complex error correction codes
Solution Approach 2:
The system pre-configures the repetition level parameter and multiple CORESET configurations before transmission. This preliminary setup allows the receiver to prepare multiple decoding attempts in advance, improving reliability through pre-planned redundancy rather than complex real-time error correction
2Reliability
If control information is transmitted with high reliability requirements, then transmission reliability improves, but transmission latency increases
Solution Approach 1:
Multiple CORESETs are transmitted continuously in sequence rather than waiting for acknowledgment and retransmission. The receiver performs blind decoding on each transmitted CORESET immediately, maintaining continuous useful action and reducing overall latency compared to stop-and-wait retransmission protocols
Solution Approach 2:
The system transmits more control information copies than strictly necessary for basic reliability (excessive action). By sending multiple repetitions with the repetition level parameter, the system ensures that even if some transmissions are lost, sufficient copies arrive within the latency budget, achieving high reliability without excessive delay
3Reliability
If blind decoding is performed on multiple repeated CORESETs, then reliability of control information reception improves, but processing complexity at UE increases
Solution Approach 1:
The blind decoding process is segmented into multiple independent attempts on different CORESETs rather than one complex decoding process. Each CORESET can be decoded independently using the same algorithms, distributing processing complexity across multiple simpler operations rather than one complex operation
Solution Approach 2:
The system uses identical copies of control information across multiple CORESETs with the same configuration parameters. The UE can reuse the same blind decoding algorithms and search space configurations for each repetition, reducing processing complexity through pattern recognition rather than developing new complex decoding methods
Data Source
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AI summary
The disclosure relates to a method and apparatus for repeatedly transmitting control information in a wireless communication system, and in an embodiment, a method, performed by a user equipment (UE), of repeatedly transmitting control information in a wireless communication system includes receiving, from a base station (BS), a control information repetition configuration including a repetition level parameter which indicates a number of repeatedly transmitted control resource sets (CORESETs), and performing blind decoding on the repeatedly transmitted CORESETs, based on the control information repetition configuration.