Combined Gateway Integrating SGW and PGW Functions
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Solution Overview
Problem
Current wireless communication systems face inefficiencies in resource management and latency due to the separation of mobility management entities (MME), serving gateways (SGW), and packet data network gateways (PGW) in LTE-SAE networks, which can lead to increased resource usage and reduced throughput.
Innovation Solution
Implementing a combined gateway device that integrates the functionalities of MME, SGW, and PGW on a single platform, such as the Starent Networks ST16 or ST40 multimedia core platform, allowing for a single session that acts as both SGW and PGW, reducing resource usage and latency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If MME, SGW, and PGW are implemented as separate network elements, then network functionality and reliability are improved, but device complexity and resource usage increase
Solution Approach 1:
The patent combines the SGW and PGW functionalities into a single network element called a combined gateway. This merging reduces the number of network elements from three separate devices (MME, SGW, PGW) to two (MME and combined gateway), thereby reducing device complexity and resource usage while maintaining the essential network functionality through careful design of the combined gateway's internal architecture
2Reliability
If separate physical connections are established between sender and receiver, then data transfer reliability is improved, but network resource usage increases due to fixed resource allocation
Solution Approach 1:
The combined gateway acts as an intermediary that consolidates the SGW and PGW functions. By routing traffic through this single combined entity rather than maintaining separate dedicated paths, the system achieves reliable data transfer while improving network resource utilization. The combined gateway efficiently manages packet forwarding and session management, eliminating the need for fixed resource allocation across multiple separate network elements
3Adaptability or versatility
If multiple network hops are required for data transmission, then network routing flexibility is improved, but latency increases and throughput decreases
Solution Approach 1:
By merging SGW and PGW into a single combined gateway, the patent reduces the number of network hops required for data transmission. Instead of packets traversing through multiple separate network elements (SGW then PGW), the combined gateway handles both functions internally, significantly reducing latency and improving throughput while maintaining routing flexibility through the gateway's intelligent packet management capabilities
Data Source
AI summary
The functionalities of one or more of a mobility management entity (MME), serving gateway (SGW), and packet data network gateway (PGW) can be provided in a single device on the network. In the access gateway different functional elements are implemented as services and they can be configured on the same device. For example, the SGW and PGW can be configured on the same device. When user equipment UE connects from a home network, it is possible for the MME to choose the same SGW and PGW. This combined SGW and PGW can implement a single session for the UE, thereby capable of providing a savings in resources, allowing additional capacity, and allowing reduced latency and increased throughput because fewer hops are made on the network. This session acts as a SGW on the ingress side and a PGW on the egress side of the access gateway.