System Message Transmission Configuration to Reduce Blind Detection
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Solution Overview
Problem
Terminal devices face increased processing complexity and reduced coverage enhancement effectiveness due to uncertainty in system message transmission configurations within system message windows, leading to inefficient receiving and combination operations.
Innovation Solution
A coverage enhancement transmission apparatus and method that determines and communicates system message transmission configurations to terminal devices, allowing precise knowledge of message window parameters and subframe locations for improved reception.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the terminal device performs blind detection on PDCCH scrambled by SI-RNTI to determine system message transmission configuration, then the terminal device can adapt to network-configured message windows, but the processing complexity of the terminal device increases and coverage enhancement effect deteriorates
Solution Approach 1:
The patent applies preliminary action by having the network side device pre-determine and notify the terminal device of the system message transmission configuration (including window length, periodicity, and subframe locations) before the actual message transmission. This allows the terminal device to know in advance where to receive system messages, eliminating the need for complex blind detection while maintaining adaptability to network configurations.
2Adaptability or versatility
If the terminal device performs blind detection on PDCCH scrambled by SI-RNTI to determine system message transmission configuration, then the terminal device can adapt to network-configured message windows, but the coverage enhancement effect deteriorates
Solution Approach 1:
By notifying the terminal device in advance of the exact transmission configuration (window parameters, subframe locations), the network enables the terminal to perform targeted receiving operations rather than repeated blind detection attempts. This preliminary information provision significantly improves coverage enhancement effectiveness, especially for MTC devices in challenging environments like basements.
3Extent of automation
If the system message transmission configuration is determined by the base station without notification, then the network maintains flexibility in message scheduling, but the terminal device cannot exactly know the transmission configuration, increasing processing complexity
Solution Approach 1:
The patent implements feedback by having the network side device notify the terminal device of the determined transmission configuration. This creates a feedback loop where the network maintains automated scheduling flexibility while providing the terminal with the necessary information to efficiently receive messages, resolving the contradiction between automation and terminal complexity.
Data Source
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Figure 1c
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AI summary
Provided is a coverage enhancement transmission apparatus for a system message, including a determining unit and a transmission unit. The determining unit is configured to determine configuration information, where the configuration information is used to indicate a system message transmission configuration in a system message window; and the transmission unit is configured to send a system message on a resource indicated by the configuration information, so that a terminal device receives the system message according to the configuration information. In addition, another coverage enhancement transmission apparatus for a system message and a coverage enhancement transmission system and method for a system message are further provided.