Flexible Common Message Transmission Configuration for MTC Devices
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Solution Overview
Problem
In machine-to-machine (M2M) communication, existing technologies face challenges in efficiently transmitting common messages, such as paging and random access response messages, due to varying coverage enhancement requirements and differing environments of MTC devices, which affect the need for different signal repetitions and bandwidth usage.
Innovation Solution
A method and device configuration that allows a base station to determine a flexible transmission configuration for common messages, including parameters like the number of narrow bands, location of narrow bands, largest transport block size, and control channel scheduling, enabling adaptive and efficient message transmission based on statistical data and specific device requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If signal repetition is used to implement coverage enhancement for MTC devices with different coverage enhancement levels, then coverage enhancement is improved, but device complexity and network configuration complexity increase due to needing to manage different quantities of signal repetitions for different devices
Solution Approach 1:
The patent changes the parameter of transmission configuration by introducing multiple predefined configurations (first, second, third configurations) with different repetition quantities. The network device selects appropriate configurations based on device categories, transforming a complex per-device customization problem into a manageable parameter selection problem from a finite set of predefined options.
Solution Approach 2:
The patent segments MTC devices into different categories (first, second, third categories) based on their coverage enhancement requirements. Each category is assigned specific transmission configurations, dividing the complex problem of managing all possible device requirements into manageable segments that can be handled independently.
2Ease of manufacture
If the operating bandwidth of MTC devices is limited to 1.4 MHz to reduce costs, then device cost is reduced, but transmission capacity and efficiency deteriorate
Solution Approach 1:
The patent introduces dynamic transmission configurations that can be selected based on actual needs. Different configurations include different numbers of narrowbands (1, 2, or 4), allowing the system to dynamically adjust transmission capacity within the 1.4 MHz bandwidth constraint. This enables the system to optimize between cost and capacity by selecting appropriate configurations for different scenarios.
3Reliability
If the quantity of random access response messages and paging messages sent by the base station is increased to handle varying MTC device loads, then network coverage and accessibility are improved, but network resource consumption and interference increase
Solution Approach 1:
The patent applies local quality by assigning different transmission configurations to different device categories based on their specific needs. Instead of uniformly increasing messages for all devices, the system tailors the transmission parameters (number of narrowbands, repetition quantities) to local requirements of each device category, optimizing resource usage while maintaining necessary coverage.
4Adaptability or versatility
If flexible transmission configurations with multiple parameters are introduced to adapt to different MTC device requirements, then adaptability is improved, but system complexity and configuration management difficulty increase
Solution Approach 1:
The patent applies preliminary action by pre-defining multiple transmission configurations (first, second, third configurations) with specific parameter settings before actual communication occurs. The network device and terminal device both store these predefined configurations and select appropriate ones based on device categories, avoiding the need for complex real-time configuration negotiations and reducing system complexity.
Data Source
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AI summary
The present invention provides a method for transmitting a common message and a related device. The method includes: determining, by a base station, a first transmission configuration, where the first transmission configuration includes at least one group of transmission parameters and a moment for using each group of transmission parameters, each group of transmission parameters includes one or more of the following parameters: a quantity of narrow bands used to send the common message, a location of a narrow band used to send the common message, or a largest transport block size and a control channel scheduling indication that are used to send the common message, and the control channel scheduling indication is used to indicate whether to use a control channel to schedule and send the common message; and transmitting, by the base station, the common message to a target machine type communication MTC device according to the first transmission configuration. According to the foregoing technical solutions, a base station can determine a manner and a parameter that are used to send a common message at a different moment, so as to flexibly control sending of the common message.