MME Path Selection via PGW Status Reports
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
In wireless communication networks, packet data network gateways (PGWs) often experience increased load, leading to poor throughput and latency for end users, while other PGWs within the same network may have available capacity, resulting in impaired communications due to inefficient path management.
Innovation Solution
A Mobility Management Entity (MME) identifies and manages communication paths based on status reports from PGWs, determining the least congested PGW with available capacity and optionally selecting a geographically proximate Serving Gateway (SGW) to optimize network traffic distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traffic is routed through PGWs without load monitoring, then network simplicity is maintained, but network congestion and poor throughput occur
Solution Approach 1:
The system implements feedback by having PGWs send status reports to the MME containing information about their current load and available capacity. The MME uses this feedback information to dynamically determine communication paths, routing traffic away from congested PGWs to those with available capacity, thereby improving network throughput while maintaining manageable complexity through automated decision-making
Solution Approach 2:
PGWs autonomously monitor their own status and generate status reports when their conditions change, without requiring external polling or complex centralized control. This self-service approach allows the system to adapt to changing network conditions automatically, improving throughput through dynamic load balancing while keeping the control mechanism simple
2Reliability
If PGWs handle increased load without redistribution, then device capacity utilization is maximized, but latency and service quality deteriorate
Solution Approach 1:
The communication path selection is made dynamic rather than static. The MME continuously receives status reports from PGWs and adapts path selection based on real-time conditions. When a PGW becomes congested, the system dynamically redirects traffic to alternative PGWs with available capacity, maintaining service quality and reducing latency without requiring manual intervention or complex reconfiguration
Data Source
AI summary
A Long Term Evolution (LTE) network connects wireless communication devices to an Internet. In the LTE network, a Packet Data Network Gateway (P-GW) exchanges user communications between the wireless communication devices and the Internet. The P-GW determines a number of additional wireless communication devices the P-GW can serve and transfers the number to a Mobility Management Entity (MME). The MME allocates a new wireless communication device to the P-GW based on the number of additional wireless communication devices reported by the P-GW. The MME may redirect one of the wireless communication devices to the P-GW based on the number.