RRC Connection Prioritization in Wireless Networks
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Solution Overview
Problem
Current wireless communication systems face challenges in prioritizing specific services, such as VoLTE calls, over other mobile originated data calls due to limitations in the capacity of RRC connection request messages, which can lead to difficulties in extending service prioritization in congested environments.
Innovation Solution
A method is introduced where a network determines a prioritized service type and transmits RRC connection allowance information to base stations, allowing user equipment to include prioritized service access information in RRC connection requests, enabling prioritization without relying on system information changes, thus allowing only prioritized services to establish RRC connections during network congestion.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If RRC connection request message capacity is limited, then message structure remains simple and manageable, but the ability to extend service types that need prioritization is restricted
Solution Approach 1:
The patent segments the service prioritization mechanism into two parts: (1) a fixed, simple RRC connection request message structure that maintains backward compatibility, and (2) a separate prioritized service access information element that can be added without modifying the core message structure. This allows service type extendability while keeping the base message structure simple and manageable.
Solution Approach 2:
The patent embeds prioritized service access information within the existing RRC connection request message framework. The prioritization information is nested as an additional information element that fits within the overall message structure without disrupting the existing simple format, enabling service type extension while maintaining structural simplicity.
2Reliability
If access barring procedure is applied to all UEs, then network overload is controlled, but prioritized services cannot be guaranteed during congestion
Solution Approach 1:
The patent applies different access control policies to different service types. Prioritized services (such as emergency services, high-priority data, or specific QoS classes) are granted access during network congestion, while non-prioritized services are subject to access barring. This local differentiation ensures service prioritization guarantees without completely blocking network access, maintaining productivity for allowed services.
Solution Approach 2:
The patent implements dynamic access control where the network can adjust which services are prioritized based on current network conditions and operator policies. The prioritized service access information allows flexible modification of access rights during runtime, enabling the system to adapt to changing congestion levels while maintaining reliability for critical services.
3Reliability
If system information changes are required for service prioritization, then comprehensive control is achieved, but system-wide changes increase complexity and deployment difficulty
Solution Approach 1:
The patent extracts the service prioritization control mechanism from the system information configuration and places it directly in the RRC connection request message. This allows prioritization control to be implemented at the message level without requiring changes to system-wide information structures, reducing deployment complexity while maintaining comprehensive control over prioritized services.
Solution Approach 2:
The patent uses the RRC connection request message as an intermediary carrier for prioritized service access information. Instead of modifying system information structures directly, the prioritization data is transmitted through the existing message framework, which acts as a mediator between the UE and the network, simplifying implementation while achieving comprehensive control.
Data Source
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AI summary
Provided are: a method by which a terminal transmits a prioritized service in a wireless communication system, and a device for supporting the same. The terminal transmits, to a network, an RRC connection request message including prioritized service access information, and transmits, to the network, an RRC connection setup complete message including a service type to be transmitted by the terminal, wherein the prioritized service access information can be information indicating that a service to be more preferentially processed than other services is accessed.