Enhanced Random Access Sequence for MTC Terminal Coverage
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Solution Overview
Problem
Machine Type Communication (MTC) terminals experience poor access quality due to limitations in the LTE/LTE-A system, particularly in scenarios where MTC terminals are located in areas with penetration loss, such as basements or corners, requiring enhanced uplink and downlink coverage to maintain performance comparable to standard LTE UE.
Innovation Solution
A method for transmitting an enhanced random access sequence, involving the generation and transmission of an enhanced random access sequence based on a random access sequence and enhanced configuration information, including arrangement mode and resource allocation information, to improve access quality by optimizing the Physical Random Access Channel (PRACH) in the LTE/LTE-A system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If MTC terminal uses low-cost configuration (reducing receiving antennas, baseband processing bandwidth, peak rate), then terminal cost is reduced, but coverage performance and access quality deteriorate
Solution Approach 1:
The patent changes the parameters of the random access channel by introducing enhanced configuration information that specifies different arrangement modes and resource allocations for MTC terminals. This allows the system to optimize the random access procedure specifically for low-cost MTC terminals, improving their access quality and coverage performance without requiring changes to the terminal hardware configuration.
Solution Approach 2:
The patent segments the random access channel configuration into different modes (first arrangement mode and second arrangement mode) with different cyclic prefix lengths and resource allocations. MTC terminals can be assigned to appropriate segments based on their capabilities and coverage requirements, allowing low-cost terminals to use optimized configurations that improve their access performance while maintaining system efficiency.
2Ease of operation
If MTC terminal is located in basement or corners with penetration loss, then terminal accessibility is maintained, but link performance and coverage deteriorate
Solution Approach 1:
The patent applies local quality by providing different random access channel configurations tailored to specific terminal locations and conditions. Enhanced configuration information allows the network to assign appropriate resource allocations and arrangement modes based on the terminal's location (e.g., basement or corner locations with penetration loss), optimizing link performance for each local condition while maintaining accessibility.
3Adaptability or versatility
If standard random access sequence is used, then system compatibility is maintained, but access quality for MTC terminals deteriorates
Solution Approach 1:
The patent introduces dynamic configuration of the random access channel with multiple arrangement modes that can be adaptively selected based on terminal type and conditions. The enhanced configuration information enables the system to dynamically switch between different random access sequences and resource allocations, providing optimized access quality for MTC terminals while maintaining compatibility with standard LTE terminals through appropriate mode selection.
Data Source
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AI summary
A method for transmitting an enhanced random access sequence and a machine type communication terminal, wherein node 1 generates an enhanced random access sequence according to a random access sequence and enhanced configuration information, and the node 1 sends the enhanced random access sequence on an enhanced random access channel. The embodiment of the present invention performs an enhanced design on a random access channel in the LTE/LTE-A system to improve the access quality of a machine type communication terminal and ensure that a machine type communication terminal can normally access the system.