Network Congestion Control via Dynamic Switching
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Solution Overview
Problem
Existing congestion control methods in wireless networks fail to ensure the normal execution of critical services on user equipment with embedded UICC (eUICC) during network congestion, particularly for real-time services like medical devices or vehicle navigation, as they restrict access without considering service requirements.
Innovation Solution
A congestion control method that involves a user equipment sending a network connection request, receiving a rejection message with network switching indication, and accessing a second mobile network based on this information, facilitated by a subscription manager that determines the need for network switching based on congestion state information and service policies.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If traditional congestion control method is used to reject network access during congestion, then network overload is reduced, but service execution on user equipment cannot be ensured
Solution Approach 1:
The patent segments the network access control by service type, separating critical real-time services from non-critical services. The congestion control mechanism applies different policies: critical services are allowed to access the network even during congestion, while non-critical services are rejected or delayed. This segmentation ensures service execution reliability for critical applications while maintaining overall network access efficiency.
Solution Approach 2:
The patent implements local quality by applying different congestion control policies to different services and user equipment based on their specific requirements. The network device determines whether to allow access based on service characteristics, UE capabilities, and congestion conditions, rather than applying a uniform rejection policy. This localized approach ensures that critical services maintain access while managing overall network load.
2Reliability
If network access is restricted during congestion, then network device overload is reduced, but real-time service requirements cannot be met
Solution Approach 1:
The patent implements preliminary action by having user equipment indicate its service requirements and time sensitivity before network access is granted. The UE provides information about service type, deadline requirements, and criticality level in advance. The network device uses this pre-provided information to make informed access decisions during congestion, ensuring that real-time services with strict timing requirements are prioritized and allowed to access the network even under load conditions.
Solution Approach 2:
The patent implements feedback mechanisms where the network device continuously monitors service execution status, network congestion conditions, and UE requirements. Based on this feedback, the network dynamically adjusts access decisions, allowing real-time services to maintain access during congestion while restricting non-critical services. This closed-loop feedback ensures that service reliability is maintained without excessive delays.
3Adaptability or versatility
If uniform congestion control policy is applied, then network management is simplified, but service-specific requirements are not considered
Solution Approach 1:
The patent implements universality by designing a congestion control mechanism that handles multiple service types and requirements through a unified framework. The network device and UE work together using standardized signaling and decision-making procedures that accommodate diverse service requirements (real-time, non-real-time, critical, non-critical) without requiring separate control mechanisms for each service type. This multi-functional approach enables service-specific adaptability while maintaining manageable system complexity.
Data Source
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AI summary
The present invention provides a congestion control method and apparatus. The method includes: sending, by a user equipment, a first network connection request to a network device of a first mobile network; receiving, by the user equipment, a first network connection rejection message from the network device, where the first network connection rejection message includes network switching indication information, where the network switching indication information is used for instructing the user equipment to switch to a second mobile network, and the network switching indication information is from a subscription manager SM; and accessing, by the user equipment, the second mobile network according to the network switching indication information. The present invention ensures normal execution of a service on an eUICC user equipment when network congestion occurs.