IP Aggregation for LTE Networks via Regional Routing
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Solution Overview
Problem
Current LTE-based networks face inefficiencies in resource utilization and transport costs due to the static anchoring function of Packet Gateways (PGWs), which cannot be combined with other network elements, leading to increased costs and resource utilization when handling large traffic loads and numerous eNBs or higher bandwidth per user.
Innovation Solution
Implementing an aggregation layer network device that supports regional and micro-regional IP routing, dynamic IP address allocation, and policy enforcement, allowing for seamless transitions of subscriber devices between base stations and reducing backhaul network bandwidth utilization by transferring context and routing information between micro-region devices.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If all traffic between UEs and the Internet travels through the anchor PGW, then IP connectivity is maintained, but transport cost and resource utilization at the PGW increase
Solution Approach 1:
The patent segments the network into multiple PGWs distributed across different regions, each serving as an anchor for UEs in its respective region. This segmentation allows traffic to be anchored locally rather than funneled through a single central PGW, reducing transport costs while maintaining IP connectivity through the distributed architecture.
Solution Approach 2:
The patent implements region-specific PGW anchoring where each PGW serves UEs in its local region. This local quality approach ensures that traffic is anchored at the nearest PGW to the UE, minimizing transport distance and cost while maintaining reliable IP connectivity through geographically distributed anchor points.
2Device complexity
If the PGW anchoring function is static and cannot be combined with SGWs, MMEs, and/or eNBs, then network architecture is simplified, but resource efficiency decreases when handling large traffic loads
Solution Approach 1:
The patent introduces dynamic PGW selection based on UE location and traffic patterns. The system can dynamically determine which PGW should anchor traffic for a given UE, allowing the network to adapt to changing conditions and optimize resource efficiency while handling large traffic loads, rather than using a static anchoring approach.
Solution Approach 2:
The patent adds a regional dimension to the network architecture by distributing PGWs across multiple geographic regions. This dimensional expansion allows the network to handle large traffic loads more efficiently by utilizing multiple PGWs simultaneously, each serving its regional UEs, thereby improving overall resource efficiency without significantly increasing architectural complexity.
3Productivity
If the network grows to include a large number of eNBs or larger bandwidth per user, then network capacity increases, but PGW resource utilization becomes inefficient
Solution Approach 1:
The patent segments the network into multiple regional PGWs that can independently handle traffic from multiple eNBs. This segmentation allows the network to scale capacity by adding eNBs and bandwidth per user while distributing the load across multiple PGWs, preventing any single PGW from becoming a bottleneck and maintaining efficient resource utilization.
Data Source
AI summary
A mobile architecture system includes a plurality of connection nodes each comprising an access interface and at least one network interface. A plurality of aggregation layer devices are each coupled to respective sets of connection nodes to form aggregation regions. A backhaul network is coupled to each of the aggregation layer devices, and a mobility entity is coupled to the backhaul network, wherein each of the connection nodes is configured to receive attachment requests from at least one user device. The aggregation layer devices are configured to assign IP addresses to user devices connected to connection nodes coupled to the respective aggregation layer devices. The aggregation layer devices are configured to determine IP routes from the backhaul network to the connection nodes based on the assigned IP addresses. The aggregation layer devices are further configured to notify respective connection nodes regarding the IP addresses assigned to connected user devices.