Relay UE Remote Terminal Selection for Congestion Access Control
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Solution Overview
Problem
In 3GPP LTE networks, network congestion leads to access control issues, where remote UEs may not establish RRC connections or use services due to unclear access control mechanisms, resulting in resource wastage and delayed service connections.
Innovation Solution
A method for a relay UE to select a remote UE based on matching access class, configuration, and congestion control information, prioritizing UEs with compatible settings to optimize access control during network congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If access control is applied during network congestion, then network resource wastage is prevented, but service connection delay increases for remote UEs
Solution Approach 1:
The relay UE performs preliminary actions by proactively announcing access control information (access class, configuration, congestion control parameters) to remote UEs before network congestion occurs or before access attempts are made. This allows remote UEs to pre-evaluate compatibility and select appropriate relay UEs in advance, preventing both resource wastage from incompatible connections and delays from last-minute access control failures
Solution Approach 2:
Instead of the network directly controlling access for each remote UE individually (which causes delays), the patent inverts the control mechanism by having relay UEs autonomously announce their access control characteristics and enabling remote UEs to self-select compatible relays. This inversion from centralized to distributed control eliminates bottlenecks while maintaining resource efficiency
2Reliability
If relay UE selection is based on detailed access control matching, then access control reliability is improved, but device complexity increases
Solution Approach 1:
The access control information is segmented into distinct, independently comparable parameters: access class, configuration parameters, and congestion control information. Each parameter can be evaluated separately through simple matching operations, avoiding the need for complex holistic evaluation while maintaining comprehensive compatibility checking across all critical dimensions
Solution Approach 2:
The relay UE creates and broadcasts a copy of its access control parameter set (access class, configuration, congestion control info) in announcement messages. Remote UEs then perform simple equality comparisons between their own parameters and the copied parameters from candidate relay UEs, replacing complex compatibility algorithms with straightforward data matching operations
Data Source
AI summary
One embodiment of the present invention provides a method for a relay UE to select one of remote UEs when access control is applied due to network congestion. The method includes: receiving an announcement message including first information from at least one of the remote UEs; comparing the first information with second information that the relay UE has; selecting a remote UE transmitting the first information that matches the second information from among the remote UEs when the first information matches the second information; selecting one remote UE from among the remote UEs according to a priority when the first information does not match the second information; and transmitting a response message to the selected remote UE.