Random Access Preamble Transmission Classification for MTC Signaling Load
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Solution Overview
Problem
The existing wireless communication systems face challenges in efficiently managing network signaling loads for Machine-Type Communication (MTC) devices, which can lead to insufficient network resources due to the high likelihood of simultaneous communication from a large number of MTC devices.
Innovation Solution
The method involves classifying maximum transmission numbers for random access preamble and uplink message transmissions into different types, specifically for cell-common and cause-specific random access, and using these classifications to optimize the transmission process, including the use of counters for retransmissions and inclusion of transmission information in dedicated signaling, system information, and paging messages.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a single maximum transmission number is used for all random access procedures, then the control signaling structure is simple, but the network cannot efficiently handle simultaneous communications from a large number of MTC devices
Solution Approach 1:
The patent segments the maximum transmission number into different types: first type maximum transmission number for cell-common random access and second type maximum transmission number for cause-specific random access. This segmentation allows the network to manage different access scenarios with appropriate transmission limits, preventing network resource exhaustion while maintaining manageable control signaling structure.
2Reliability
If the maximum transmission number is increased to handle more retransmissions, then the reliability of random access improves, but the delay time increases
Solution Approach 1:
The patent applies different maximum transmission numbers to different random access scenarios based on their specific requirements. Cell-common random access uses the first type maximum transmission number while cause-specific random access uses the second type, allowing each scenario to have optimized transmission limits that balance reliability and delay characteristics according to its local needs.
3Object-generated harmful factors
If multiple maximum transmission numbers are implemented for different access types, then the network can better manage signaling loads, but the UE configuration complexity increases
Solution Approach 1:
The patent implements dynamic configuration where the UE receives different maximum transmission number values based on the specific random access procedure type. The eNodeB provides appropriate configuration information dynamically during the random access process, allowing the UE to adapt its transmission behavior without requiring complex static configuration, thus managing signaling loads while keeping UE configuration practical.
Data Source
AI summary
In the present description, a maximum transmission number for preamble and a maximum transmission number uplink message are configured to perform a random access procedure. The maximum transmission number for preamble (e.g., preambleTransMax) can be classified into a first type for general access and a second type for MTC and/or delay-tolerant accesses. Further, the maximum transmission number uplink message (e.g., maxHARQ-Msg3Tx) can be classified into a first type and a second type.