Telia Co has been granted a patent for a method that enables routing of traffic to and from a roaming host node between a home network and a visited network. The method involves configuring a subnet in the visited network with the same IP address range as the home network, creating a tunnel between the routers of the two networks, and applying a routing policy to allow the roaming host node to reply to received traffic and route its own traffic through the network interconnecting the routers. GlobalData’s report on Telia Co gives a 360-degree view of the company including its patenting strategy. Buy the report here.
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According to GlobalData’s company profile on Telia Co, perimeter security was a key innovation area identified from patents. Telia Co's grant share as of September 2023 was 59%. Grant share is based on the ratio of number of grants to total number of patents.
Enabling routing of traffic for roaming host nodes
A recently granted patent (Publication Number: US11777851B2) describes a method and system for enabling routing of traffic to and from a roaming host node between a home network and a visited network. The method involves configuring a subnet in the visited network with the same IP address range as the subnet in the home network. A tunnel is created between routers in the home and visited networks to route traffic from a host node in the home network to the roaming host node in the visited network. The roaming host node maintains its IP address in the visited network subnet. A routing policy is applied to the visited network router to enable the roaming host node to reply to traffic from the home network and route its own traffic through a network connecting the visited and home network routers, rather than through the tunnel.
The patent also includes additional claims for creating a Virtual Route Forwarder (VRF) in the visited network router, assigning interfaces and tunnel endpoints to the VRF, and importing routes from routing tables to establish a session between the tunnel endpoints. Furthermore, the patent describes configuring a second interface on the visited network router with an IP address from the visited network subnet range, connecting it to a switch in the visited network, and creating a static route to route traffic destined for the home network subnet to a router connected to the network. A second VRF can be created to assign the second interface to it and import routes to its VRF table.
The method and system described in the patent enable efficient routing of traffic for roaming host nodes between home and visited networks. By maintaining the IP address of the roaming host node in the visited network subnet and using a routing policy, the roaming host node can seamlessly communicate with host nodes in the home network and route its own traffic through the network interconnecting the visited and home network routers. The use of VRFs and importing routes allows for effective management of routing tables and establishment of tunnel sessions.
Overall, this patent provides a technical solution for enabling efficient routing of traffic for roaming host nodes, which can be beneficial in various network environments.
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GlobalData Patent Analytics tracks bibliographic data, legal events data, point in time patent ownerships, and backward and forward citations from global patenting offices. Textual analysis and official patent classifications are used to group patents into key thematic areas and link them to specific companies across the world’s largest industries.
