SGW-PGW Address Aliasing for Wireless Network Capacity Expansion
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Solution Overview
Problem
Wireless telecommunication networks face capacity constraints due to limited capacity of serving gateways (SGWs) and packet data network gateways (PGWs), particularly in high-traffic areas, necessitating a solution to enhance network capacity.
Innovation Solution
The implementation of a dual SGW and PGW system with address aliasing, where each SGW is assigned two fully qualified domain names (FQDNs) to facilitate communication with two colocated PGWs, allowing parallel handling of voice and data packets, effectively doubling the network's capacity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If a single SGW and PGW are used, then device complexity is low, but network capacity is limited
Solution Approach 1:
Each SGW is configured with two FQDN addresses, enabling it to communicate with two different PGWs (colocated or non-colocated). This multi-functionality allows a single SGW to handle multiple data streams simultaneously, effectively doubling network capacity without requiring additional SGW hardware
Solution Approach 2:
The network traffic is segmented into two separate data streams, each handled by a dedicated PGW. The SGW maintains separate FQDN addresses for routing different traffic types to appropriate PGWs, allowing parallel processing of voice and data packets to increase overall network throughput
2Speed
If sequential processing of voice and data packets is used, then device complexity is low, but processing speed is slow
Solution Approach 1:
The packet processing function is segmented into parallel paths: voice packets are routed through one SGW-PGW pair while data packets are routed through another SGW-PGW pair. This segmentation enables simultaneous processing of different packet types, eliminating sequential bottlenecks and improving overall processing speed
Solution Approach 2:
The system transitions from sequential (time-based) processing to parallel (spatial) processing by introducing multiple SGW-PGW communication paths. Each path operates independently, allowing voice and data packets to be processed simultaneously in different dimensional spaces rather than one after another
3Quantity of substance
If network capacity is increased by adding more gateways, then network capacity improves, but infrastructure cost increases
Solution Approach 1:
Existing SGWs are configured with additional FQDN addresses to enable communication with multiple PGWs, allowing the same hardware to perform multiple functions. This approach doubles network capacity without requiring additional SGW hardware, significantly reducing infrastructure deployment costs
Solution Approach 2:
The system creates logical copies of gateway functions through FQDN address aliasing rather than physical hardware duplication. Multiple FQDN addresses point to the same physical PGW resources, enabling capacity expansion through software configuration rather than hardware replication, thereby reducing costs
Data Source
AI summary
The disclosed system includes a first gateway of a first type configured to receive wireless packets from a core network node, and a second gateway of a second type colocated with the first gateway and configured to transmit at least a portion of the wireless packets to a network. The first gateway is configured with a first internet address that identifies the second gateway and a second internet address that identifies a third gateway of the second type. The first gateway is configured to transmit a first portion of the wireless packets to the second gateway based on the first internet address and transmit a second portion of the wireless packets to the third gateway based on the second internet address. The second gateway is configured with a third internet address that identifies the second gateway.