DCI Transmission via Multiple PDCCHs for UE Reliability
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Solution Overview
Problem
Current communication systems face challenges in ensuring high reliability, particularly in receiving Downlink Control Information (DCI) by User Equipment (UE), which affects the correct reception of downlink data, necessitating an improvement in the probability of DCI reception.
Innovation Solution
The method involves the access network equipment sending DCI through multiple Physical Downlink Control Channels (PDCCHs, providing multiple opportunities for UE to receive DCI, thereby increasing the reliability of communication services.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If DCI is sent through a single PDCCH, then device complexity is low, but reliability of DCI reception is insufficient for high reliability services
Solution Approach 1:
The patent segments the DCI transmission by sending it through multiple separate PDCCHs instead of a single PDCCH. Each PDCCH carries the same DCI information, and the UE stops detecting when it successfully receives one. This segmentation approach improves reliability by providing multiple independent transmission paths while managing complexity through the stop-on-success mechanism.
Solution Approach 2:
The patent applies partial action by having the UE detect only n target PDCCHs among potentially more PDCCHs in the search space. The UE stops detecting once it successfully receives the DCI on any one of the n PDCCHs, performing only the necessary number of detections required to achieve reliable reception without unnecessarily processing all possible PDCCHs.
2Reliability
If the UE detects n target PDCCHs to ensure high reliability, then DCI reception reliability improves, but detection time and processing load increase
Solution Approach 1:
The patent limits the UE's detection effort to exactly n target PDCCHs within the search space. The UE stops detecting as soon as it successfully receives the DCI on any one of these n PDCCHs. This approach ensures high reliability through multiple detection opportunities while controlling time loss by establishing a finite detection limit and using early termination upon successful reception.
Solution Approach 2:
The network pre-configures the UE with information about n target PDCCHs in the search space before the actual detection process. This preliminary configuration allows the UE to efficiently identify and detect only the relevant target PDCCHs without having to exhaustively search all possible PDCCHs, thereby reducing detection time while maintaining reliability.
Data Source
AI summary
A method and a device for transmitting data are provided. The method includes that a user equipment (UE) detects at least two target Physical Downlink Control Channels (PDCCHs), where each PDCCH carries target Downlink Control Information (DCI) for scheduling a target UE. Additionally, when the target DCI is detected on a target PDCCH, the UE receives downlink data sent by access network equipment to the target UE as scheduled by the target DCI.