Random Access Preamble Type Identification for LTE Terminal Differentiation
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Solution Overview
Problem
In LTE systems, the shared random access procedure between MTC terminals and ordinary terminals leads to increased competition, reduced success probability, and degraded performance for ordinary terminals due to the same random access method used by both, affecting the quality and capacity of the random access process.
Innovation Solution
A method where the base station identifies the type of terminal based on the preamble sequence, allowing for differentiated bandwidth allocation, reducing collisions and improving the random access quality by sending random access responses and competition solutions on appropriate bandwidths supported by each terminal type.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If MTC terminals and ordinary terminals use the same random access procedure, then the random access procedure is unified and simple to implement, but the competition between terminals is aggravated and the random access success probability is reduced
Solution Approach 1:
The patent segments the random access procedure by introducing different bandwidth handling mechanisms for MTC terminals and ordinary terminals. The base station identifies terminal type and delivers messages on appropriately sized bandwidths, separating the resource allocation paths while maintaining procedural unity.
Solution Approach 2:
The patent applies local quality by allowing MTC terminals to operate on reduced bandwidth while ordinary terminals use full bandwidth. This localized adaptation enables MTC terminals to participate in random access without degrading the performance of ordinary terminals on wider bandwidth channels.
2Adaptability or versatility
If random access response messages and competition solution messages are delivered only in the small bandwidth range to ensure MTC terminal reception, then MTC terminal compatibility is achieved, but the reception performance of ordinary terminals is decreased
Solution Approach 1:
The patent implements dynamic bandwidth allocation where the base station adapts the message delivery bandwidth based on terminal type identification. MTC terminals receive messages on small bandwidth while ordinary terminals receive on full bandwidth, creating a dynamic rather than static resource allocation system.
Solution Approach 2:
The patent changes the bandwidth parameter based on terminal capabilities. The base station modifies the transmission bandwidth parameter according to whether the terminal is an MTC terminal or an ordinary terminal, optimizing reception performance for each terminal type.
3Productivity
If MTC terminals compete with ordinary terminals on the same PRACH resources, then resource utilization is maximized, but the competition intensity increases and random access quality deteriorates
Solution Approach 1:
The patent segments the message delivery phase into separate bandwidth channels based on terminal type. While both terminal types use the same PRACH resources for preamble transmission, the subsequent message delivery is segmented into different bandwidth domains, reducing interference and improving overall random access quality.
Data Source
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AI summary
A random access method, a base station and a terminal are disclosed, and the method includes: receiving, by a base station, a preamble sequence that is sent by a terminal during random access; identifying a type of the terminal according to the preamble sequence; and sending, according to the type of the terminal, a message of a random access procedure to the terminal on processing bandwidth supported by the terminal. In embodiments of the present invention, an MTC terminal and an ordinary terminal can be distinguished in a random access procedure, influence of the MTC terminal on the ordinary terminal in the random access procedure is reduced, collision between the MTC terminal and the ordinary terminal which send a preamble sequence on the same time frequency resource is avoided, competition between the MTC terminal and the ordinary terminal in the random access procedure is alleviated, and the random access quality of the ordinary terminal is improved.