LTE Common Message Transmission for MTC Terminals
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Solution Overview
Problem
In LTE networks, low cost MTC terminals have a reduced data processing bandwidth, making it challenging for both low cost MTC and normal LTE terminals to reliably receive common messages broadcast by base stations.
Innovation Solution
The method involves determining specific common message transmission time instances for low cost MTC terminals within the cell's common message transmission time instances, ensuring the bandwidth used for transmission does not exceed the terminal's data processing capabilities, allowing both types of terminals to receive messages reliably.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the base station transmits common messages using the full system bandwidth, then normal LTE terminals can receive messages reliably, but low cost MTC terminals cannot process the messages due to their reduced data processing bandwidth
Solution Approach 1:
The patent segments the cell common message transmission time instances into two distinct sets: one set for low cost MTC terminals with reduced bandwidth capability, and another set for normal LTE terminals with full bandwidth capability. This segmentation allows the base station to transmit common messages at different time instances tailored to each terminal type's processing capabilities, ensuring both can receive messages reliably without interference
Solution Approach 2:
The patent implements dynamic message transmission scheduling where the base station adaptively selects transmission time instances based on the terminal type. For low cost MTC terminals, messages are transmitted at specific time instances when the base station uses reduced bandwidth configurations. For normal LTE terminals, messages are transmitted at other time instances using full system bandwidth. This dynamic adaptation resolves the contradiction between reliability and terminal compatibility
2Adaptability or versatility
If the base station uses reduced bandwidth for common message transmission, then low cost MTC terminals can process messages, but normal LTE terminals may experience reduced reception efficiency
Solution Approach 1:
The patent segments transmission time instances into dedicated slots for different terminal types. Low cost MTC terminals receive messages at time instances when reduced bandwidth is used, while normal LTE terminals receive messages at separate time instances when full bandwidth is available. This temporal segmentation ensures each terminal type operates at optimal efficiency without compromising compatibility
Solution Approach 2:
The patent changes the bandwidth parameter dynamically based on the target terminal type. When transmitting to low cost MTC terminals, the base station reduces the bandwidth parameter to match their processing capabilities. When transmitting to normal LTE terminals, the base station uses the full system bandwidth parameter to maximize reception efficiency. This parameter adaptation resolves the contradiction between compatibility and productivity
Data Source
AI summary
The present disclosure provides a transmission method for a common message and a device, which relates to a field of communication technologies and is invented for effectively ensuring that both a low cost MTC terminal and a normal LTE terminal may reliably receive the common message. The method for the common message includes: determining, by a network device, common message transmission time instances X corresponding to a terminal device, wherein the common message transmission time instances X are a part of cell common message transmission time instances; and transmitting, by the network device, a common message at the common message transmission time instances X corresponding to the terminal device. The present disclosure may be used in an M2M application based on an LTE network.