Random Access Message Transmission for MTC Terminals
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Solution Overview
Problem
Current technologies face challenges in determining the capabilities of Machine Type Communication (MTC) User Equipment (UE) during random access, leading to interference issues due to the inability to differentiate between terminals supporting single or multiple subcarriers, affecting the efficient transmission of messages.
Innovation Solution
The method involves classifying terminals into sets based on their subcarrier transmission capabilities, using type-1 messages and type-2 messages to determine the appropriate transmission method, which can be single or multiple subcarrier transmission, and configuring subcarrier intervals based on terminal rankings or transport block sizes to minimize interference.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If terminals transmit random access messages without classification by subcarrier capability, then the random access process is simple, but random access interference occurs due to inability to differentiate between single and multiple subcarrier terminals
Solution Approach 1:
The patent segments terminals into different sets (first terminal set and second terminal set) based on their subcarrier transmission capabilities. Terminals supporting multiple subcarriers are classified into the first terminal set, while terminals supporting only single subcarrier are classified into the second terminal set. This segmentation enables differentiated transmission methods for different terminal types, resolving random access interference while maintaining manageable complexity through systematic classification.
2Productivity
If multiple subcarrier transmission is used for all terminals, then transmission efficiency is improved, but terminals with single subcarrier capability cannot be supported
Solution Approach 1:
The patent applies local quality by configuring different transmission methods for different terminal sets based on their specific capabilities. The first terminal set (multi-subcarrier capable terminals) is configured to use multiple subcarrier transmission methods for higher efficiency, while the second terminal set (single-subcarrier terminals) is configured to use single subcarrier transmission methods for compatibility. This localized optimization ensures each terminal type operates at its optimal performance level.
3Loss of time
If terminal capabilities are not differentiated during random access, then the access process is fast, but message transmission accuracy deteriorates due to interference
Solution Approach 1:
The patent implements preliminary action by classifying terminals into different sets based on their subcarrier capabilities before the random access message transmission begins. The base station pre-configures different transmission methods for the first terminal set (multiple subcarriers) and the second terminal set (single subcarrier). This preliminary classification ensures that when random access occurs, terminals already have appropriate transmission methods assigned, maintaining fast access while ensuring accurate message transmission through capability-matched methods.
Data Source
AI summary
The present embodiments provide a method for the transmission of messages during random access, comprising: terminals that transmit type-1 messages to the base station according to the type-1 message transmission method corresponding to the terminal set to which the terminal belongs; wherein, the terminal sets are classified according to the subcarrier transmission capability supported by the terminals. The present embodiments also provide three other methods for the transmission of messages during random access, as well as the corresponding devices and computer storage mediums.