Base Station Congestion Control via User Subscription Data
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Solution Overview
Problem
In wireless communication systems like LTE, congestion occurs due to resource limitations, leading to deteriorated user quality of experience and improper charge imposition, especially during handovers and connection losses.
Innovation Solution
The Evolved Node B (eNB) requests and receives user subscription information from the Mobility Management Entity (MME) to perform congestion control, allowing for differential packet transmission and charge management based on user context and application attendance, thereby minimizing user inconvenience and preventing improper charging.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If congestion control is implemented in wireless communication systems, then resource utilization is improved, but user quality of experience deteriorates
Solution Approach 1:
The patent applies local quality by differentiating congestion control treatment based on user subscription information and application attendance status. Different users receive different levels of service (attended vs unattended data transmission) depending on their subscription tier, allowing critical users to maintain quality of experience while non-critical users contribute to resource utilization
Solution Approach 2:
The patent changes the parameter of data transmission by introducing attended and unattended data modes. Attended data transmission maintains normal quality for subscribed users, while unattended data transmission reduces quality for non-subscribed users, thereby balancing resource utilization with user experience
2Reliability
If differential packet transmission is implemented based on user context, then service quality is improved, but device complexity increases
Solution Approach 1:
The patent applies preliminary action by obtaining user subscription information from the MME in advance before congestion occurs. This pre-fetching of user context data allows the eNB to immediately differentiate between attended and unattended users when congestion happens, avoiding complex real-time decision-making during congestion events
Solution Approach 2:
The patent introduces an intermediary mechanism where the MME provides subscription information to the eNB, which then uses this information to control packet transmission. This intermediary data flow simplifies the eNB's complexity by offloading the subscription management function to the MME
3Stability of the object's composition
If congestion control is applied during handover, then network stability is improved, but charge imposition accuracy deteriorates
Solution Approach 1:
The patent applies feedback by monitoring the attendance status of data packets during handover and congestion events. The system tracks whether data is attended or unattended and uses this feedback to adjust charge imposition, ensuring that users are only charged for successfully delivered attended data, thereby maintaining both network stability and charging accuracy
Data Source
AI summary
A method for managing congestion in a base station in a mobile communication system according to one embodiment of the present invention comprises the steps of: requesting user subscription information to a mobility management entity (MME); receiving the user subscription information from the MME; and performing a congestion control in a communication between terminals on the basis of the received user subscription information. According to the embodiment, action may be taken in consideration of the user information and a current congestion state when controlling the congestion in a wireless communication system, and thus side effects resulting from the congestion control may be reduced. Further, the present invention provides a method and device for not charging for dropped packets when performing a packet drop, and thus the congestion control may be performed more easily. Also, the present invention has an advantage of performing the congestion control, according to the type of packets to which congestion control is applied or the type of application or service which has generated packets, at the time of controlling the congestion, thereby minimizing user's inconvenience due to the congestion control.