Cell Site Gateway Label Forwarding for Wireless Traffic
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Solution Overview
Problem
Current wireless communication systems face challenges in efficiently managing data traffic transmission and routing within cellular networks, particularly in handling handovers and providing reliable packet forwarding across base stations and gateways, which affects network performance and operational efficiency.
Innovation Solution
The implementation of a label forwarding system within cell site gateways and packet network gateways, utilizing MPLS-TP and GMPLS control planes, enables efficient packet routing and handover management by establishing label-switched paths and employing label distribution protocols to optimize data transfer between base stations and cellular network gateways.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If traditional packet routing methods are used in wireless communication systems, then basic connectivity is maintained, but data traffic transmission efficiency deteriorates and network performance suffers
Solution Approach 1:
The patent introduces a cell site gateway as an intermediary device between base stations and the core network. This gateway implements MPLS-TP label switching to forward data packets efficiently, acting as a mediator that optimizes packet routing without requiring changes to the existing base station or core network infrastructure, thereby improving transmission efficiency while maintaining reliability
Solution Approach 2:
The patent changes the packet forwarding parameter from traditional IP routing to MPLS-TP label switching. By assigning labels to packets at the cell site gateway and using label-switched paths for forwarding, the system achieves more efficient and reliable packet transmission compared to conventional routing methods
2Reliability
If complex routing protocols are implemented to improve handover management, then handover reliability improves, but device complexity and operational overhead increase
Solution Approach 1:
The cell site gateway serves as an intermediary that simplifies handover management by maintaining label-switched paths between base stations. During handover, the gateway continues to forward packets using existing labels without requiring complex routing protocol negotiations, thereby improving handover reliability while keeping the system relatively simple
Solution Approach 2:
The patent establishes label-switched paths and assigns labels in advance before handover events occur. This preliminary configuration allows the cell site gateway to immediately forward packets during handover without complex real-time routing decisions, improving handover reliability while minimizing operational complexity
3Productivity
If MPLS-TP label switching is implemented to improve packet forwarding efficiency, then data transmission efficiency improves, but implementation complexity and capital expenditures increase
Solution Approach 1:
The patent segments the network into three functional parts: base stations that maintain existing routing, a cell site gateway that implements MPLS-TP label switching for efficient packet forwarding, and the core network that continues standard operations. This segmentation allows MPLS-TP to be implemented only where needed (at the gateway) to improve packet forwarding efficiency, while avoiding the need to redesign the entire network system
Solution Approach 2:
The cell site gateway acts as an intermediary that implements MPLS-TP label switching without requiring changes to base stations or core network equipment. This approach improves packet forwarding efficiency at the gateway while minimizing implementation complexity and capital expenditures by limiting MPLS-TP deployment to a single strategic point in the network
Data Source
AI summary
A cell site gateway comprises a first interface connected to a base station, a second interface connected to a packet network gateway, a forwarding layer, and a third interface connected to a control server. The forwarding layer transmits and receive packets. The control plane information comprises at least one first label value and at least one second label value. The control server exchanges the control plane information.