Downlink Channel Time-Domain Position Determination Without PCFICH
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Solution Overview
Problem
Current methods for enhancing coverage for MTC devices in LTE systems require additional device deployments, increasing deployment costs, and lack effective solutions for avoiding or substituting the PCFICH channel to simplify downlink physical channel structures and prevent continuous decoding errors.
Innovation Solution
A downlink channel time-domain position determination method that allows terminals to acquire the time-domain position of control and data channels without decoding the PCFICH, using signaling indication, predefinition, or blind detection based on the number of repetitions and channel types, enabling correct reception of downlink data without additional device deployments.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If additional devices such as sites and relays are deployed to enhance coverage for MTC devices, then coverage performance is improved, but deployment cost increases significantly
Solution Approach 1:
The patent changes the parameter of time-domain position determination method for downlink channels. Instead of using traditional PCFICH-based indication, the system uses predefinition or blind detection methods where the terminal determines the time-domain position of PDCCH and PDSCH based on predefined rules or by blindly detecting signal characteristics, thereby avoiding PCFICH decoding while maintaining coverage enhancement without additional device deployments
2Measurement precision
If the PCFICH channel is decoded to determine time-domain position of downlink channels, then positioning accuracy is improved, but decoding complexity increases and continuous decoding errors may occur
Solution Approach 1:
The patent extracts and removes the PCFICH channel from the downlink channel structure for MTC devices. By taking out the PCFICH indication function, the system allows terminals to determine time-domain positions through alternative methods (predefinition or blind detection), thereby eliminating PCFICH decoding complexity and potential continuous decoding errors while maintaining positioning accuracy
Solution Approach 2:
The terminal performs self-service in determining the time-domain position of downlink channels by using blind detection methods. The terminal autonomously detects signal characteristics and determines positions without relying on PCFICH indications, thereby reducing decoding complexity and avoiding continuous decoding errors associated with PCFICH
Data Source
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AI summary
A downlink control channel time-domain position determination method and device are disclosed. The method includes: a terminal determining a way for acquiring a time-domain position of a downlink control channel and/or a time-domain starting position of a downlink data channel corresponding to the downlink control channel according to a number of repetitions of resources corresponding to the downlink control channel and/or a downlink channel type; the terminal obtaining the time-domain position of the downlink control channel and/or the time-domain starting position of the downlink data channel in accordance with the way.