Packet Data Gateway for Mobile Network Resource Control
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Solution Overview
Problem
Existing telecommunications systems face inefficiencies when a mobile node roams from its home packet data network to a visited network, as internet packets do not pass through the packet data gateway, disrupting resource control and routing optimization.
Innovation Solution
A telecommunications system that includes a packet data gateway to route internet packets between the home and visited networks, where the mobile node communicates a correspondent node binding update packet with its care of address and home address, allowing the packet data gateway to adapt and route packets through itself, ensuring efficient communication and resource control.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the mobile node uses route optimization protocols like IPv6 to communicate directly without home agent, then communication efficiency is improved, but the packet data gateway loses control over internet packets
Solution Approach 1:
The patent introduces a packet data gateway as an intermediary component that mediates between the mobile node's route optimization needs and the network's resource control requirements. The gateway adapts binding update packets to ensure internet packets are routed through it, maintaining both communication efficiency and resource control capability.
2Adaptability or versatility
If the mobile node roams to a visited packet data network, then mobility flexibility is improved, but the packet data gateway cannot control the communication of internet packets
Solution Approach 1:
The patent applies preliminary action by having the packet data gateway adapt the binding update packet before the mobile node actually communicates internet packets. The gateway modifies the binding update to include its own address, ensuring that subsequent internet packets will be routed through it automatically.
3Reliability
If the packet data gateway adapts the binding update packet by replacing the care of address with its own address, then resource control is improved, but the complexity of packet routing increases
Solution Approach 1:
The patent uses parameter changes by modifying specific fields in the binding update packet, particularly replacing the care of address parameter with the packet data gateway's address. This parameter substitution enables the gateway to maintain resource control without requiring complex routing infrastructure.
Data Source
AI summary
A telecommunications system is arranged to provide a mobile communications session to a mobile node using an internet protocol. The telecommunications system comprises a home packet data network which includes a home agent of the mobile node and a visited packet data network. One of the home packet data network or the visited packet data network includes a packet data gateway for controlling the communication of the internet packets to and from the home packet data network from and to the visited packet data network. The mobile node is arranged to communicate a correspondent node binding update internet packet to the correspondent node via the packet date gateway, when the mobile node changes affiliation from the home packet data network to the visited packet data network. The correspondent node binding update internet packet provides a care of address of the mobile node within the visited packet data network and a home address of the mobile node. The packet data network is arranged to store the home address of the mobile node in association with the care of address of the mobile node, to adapt the correspondent node binding update internet packet by replacing the care of address in the received correspondent binding update packet with the address of the packet data gateway, and to communicate the adapted correspondent binding update packet to the correspondent node. The correspondent node therefore receives a correspondent binding update with the packet data gateway as the care of address. Thus, when the correspondent node communicates with the mobile node using the care of address of the packet data gateway, the packet data gateway can adapt the received internet packets, replacing the packet data gateway's address as the destination address with the care of address of the mobile node. Therefore, although a route optimization process has taken place the internet packets are still routed via the packet data gateway.