Random Access Control via Device-Specific Suggestion Messages
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Solution Overview
Problem
In LTE systems, when a network is congested, the rejection of terminal device access leads to a significant reduction in access success rate due to the network releasing all devices or services, causing conflicts and inefficiencies in re-access attempts by multiple terminal devices.
Innovation Solution
A method where terminal devices send access request messages with auxiliary information to network devices, which respond with access suggestion information, guiding terminal devices on optimal resource allocation and access timing to reduce conflicts and improve access success rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stress or pressure
If the network releases all terminal devices when congested, then the network load is reduced, but the access success rate of terminal devices is significantly reduced
Solution Approach 1:
The patent segments the unified access rejection into device-specific rejection messages, where each terminal device receives individualized access control information based on its service type, device type, and access level. This segmentation allows differentiated treatment of devices during network congestion, maintaining lower access success rates overall while preventing complete access failure for critical devices.
Solution Approach 2:
The patent changes the parameter of access control from a binary reject/accept decision to a multi-parameter control system that considers service type, device type, access level, and congestion level. By dynamically adjusting access control parameters based on these factors, the system optimizes the balance between network load reduction and maintaining acceptable access success rates for different device categories.
2Adaptability or versatility
If all terminal devices re-access after rejection, then the network attempts to serve all devices, but access conflicts increase and access success rate decreases
Solution Approach 1:
The patent implements preliminary action by providing terminal devices with access control information and alternative access configurations before they attempt re-access. The network device sends rejection messages that include guidance on when and how to re-access, preventing simultaneous re-access attempts by all devices and reducing access conflicts before they occur.
Solution Approach 2:
The patent introduces periodic action through time-based access control mechanisms, where terminal devices are instructed to re-access at specific time intervals rather than immediately. This periodic re-access strategy distributes access attempts over time, reducing congestion and improving overall access efficiency while maintaining network service coverage.
3Reliability
If the network provides individualized access control to each terminal device, then access success rate improves, but signaling overhead and network complexity increase
Solution Approach 1:
The patent applies universality by creating a multi-functional access control message structure that simultaneously handles multiple control functions. The access control information includes service type identification, device type identification, access level parameters, and re-access timing instructions, all consolidated into a single signaling message. This reduces the number of separate signaling exchanges needed while providing comprehensive individualized control.
Solution Approach 2:
The patent implements self-service by enabling terminal devices to autonomously determine their access strategy based on received access control information. Devices use the provided service type, device type, and access level parameters to self-adjust their re-access timing and target cell selection without requiring continuous network intervention, reducing signaling overhead while maintaining individualized access control.
Data Source
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AI summary
The present application discloses a method for random access, a terminal device, and a network device. The method includes that: a terminal device sends an access request message to a network device and indicates access auxiliary information of the terminal device to the network device through the access request message; the terminal device receives an access response message sent by the network device according to the access request message, wherein the access response message includes indication information for indicating rejection of access of the terminal device, and the indication information includes access suggestion information corresponding to the access auxiliary information. Thereby a success rate of random access of the terminal device is improved.