Random Access Control Message Grouping for Wireless Resource Management
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Solution Overview
Problem
In M2M systems, the high volume of random access procedures initiated by numerous terminal devices leads to limited control channel resources, particularly during emergency scenarios where many UEs simultaneously attempt to connect, causing congestion and resource shortages.
Innovation Solution
A network device determines a single processing result for multiple terminal devices and sends a unified random access control message, including terminal set identification information, to indicate this result, allowing multiple devices to share the same resource location in the downlink control channel, thereby reducing the occupancy of control channel resources.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If individual random access control messages are sent to each terminal device, then each device receives dedicated response, but control channel resources are exhausted due to high volume of simultaneous access requests
Solution Approach 1:
The patent combines multiple individual random access control messages into a single group response message that can simultaneously address multiple terminal devices. The message includes a group identifier that allows multiple UEs to identify themselves as members of the acknowledged group, thereby reducing control channel occupancy from N separate messages to 1 consolidated message while maintaining reliable acknowledgment for all N devices.
Solution Approach 2:
The random access control message is designed with universal applicability by incorporating a group identifier field that can match multiple terminal devices simultaneously. This single message structure serves the function of what would traditionally require N separate dedicated messages, enabling one message to perform multiple acknowledgment functions for different UEs based on their group membership.
2Productivity
If control channel resources are allocated for each random access response, then individual devices can be acknowledged, but resource occupancy increases with the number of simultaneous access procedures
Solution Approach 1:
The patent merges N individual random access response transmissions into a single group response message that acknowledges multiple terminal devices simultaneously. By combining the response functionality for N devices into one message and utilizing group identifier matching, the control channel resource consumption is reduced from proportional to N down to a constant level, thereby improving overall processing throughput.
3Reliability
If separate resource locations are used for each terminal device response, then individual acknowledgment is achieved, but control channel occupancy increases significantly
Solution Approach 1:
The patent consolidates N separate resource location allocations into a single shared resource location that carries a group response message. Multiple terminal devices share the same resource location for receiving acknowledgment, and device-specific accuracy is maintained through the group identifier matching mechanism rather than through separate resource allocations, thereby reducing control channel area occupancy.
Data Source
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AI summary
This application relates to wireless communications technologies, and in particular, to a random access device, method, and system, so as to resolve a problem that control channels become limited in random access procedures. In a network device provided in this application, a processing module is configured to determine a same processing result for random access procedures initiated by N terminal devices in M terminal device sets, where M and N are positive integers; and a sending module is configured to send a same random access control message to the N terminal devices, where the random access control message is used to indicate the same processing result determined by the processing module, the message includes terminal set identification information, and the terminal set identification information is used to identify the N terminal devices. The network device uses a same random access reject message to indicate the same processing result for the random access procedures to the N terminal devices. This can reduce control channel resources occupied for sending random access reject messages, and resolve a problem that control channels become limited in random access procedures.