Adaptive PRACH Repetition Factor for M2M Resource Efficiency
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Solution Overview
Problem
Current wireless communication systems experience severe resource waste in machine-to-machine (M2M) communications due to the use of a fixed repetition factor for information transmission across multiple transmission time intervals (TTIs), leading to inefficient use of resources.
Innovation Solution
A method where user-side devices determine and send a repetition factor to a network-side device based on their coverage level, allowing each device to use its own repetition factor for transmitting PRACH messages, thereby optimizing resource usage and reducing waste.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a fixed repetition factor is used for information transmission across multiple TTIs in M2M communications, then coverage capabilities are improved, but resource waste becomes severe
Solution Approach 1:
The patent applies dynamics by making the repetition factor adjustable rather than fixed. Each user-side device can independently determine and update its repetition factor based on channel conditions and coverage requirements, allowing the system to adapt transmission parameters dynamically to balance coverage enhancement with resource efficiency
Solution Approach 2:
The patent implements parameter changes by allowing the repetition factor to vary based on different conditions. User-side devices determine appropriate repetition factors according to their specific coverage levels and channel states, enabling the system to optimize the balance between achieving sufficient coverage and minimizing resource consumption
2Reliability
If multiple user-side devices use the same repetition factor for PRACH transmission, then coverage enhancement is achieved through combining gains, but resource efficiency deteriorates
Solution Approach 1:
The patent applies segmentation by dividing the group of user-side devices into different categories based on their coverage requirements. Each device independently determines its own repetition factor, segmenting the uniform transmission approach into personalized transmission strategies that match individual device needs
Solution Approach 2:
The patent implements local quality by allowing each user-side device to have different transmission parameters (repetition factors) according to its specific coverage level and channel conditions. This enables locally optimized transmission where each device uses the appropriate repetition factor for its situation rather than a uniform global parameter
Data Source
AI summary
Embodiments of the present invention provide an information transmission method, a user-side device, and a network-side device. The information transmission method provided in the embodiments includes sending, by the user-side device, a repetition factor to the network-side device, and sending, by the user-side device, a physical random access channel (PRACH) message part to the network-side device by using the repetition factor.