CS-PS Session Initialization via IM Token Routing

The patent applies universality by enabling existing network nodes to perform multiple functions. Specifically, existing telecommunication network nodes are configured to handle both traditional circuit-switched calls and packet-switched media sessions using the same infrastructure, eliminating the need for separate dedicated servers for contact list management while maintaining full functionality across both network types.

The patent merges the contact list management functionality into the existing network node infrastructure. By combining circuit-switched and packet-switched handling capabilities within the same network nodes, the system eliminates redundant servers and reduces overall network complexity while preserving contact list management capabilities.

The patent implements self-service by enabling the network to automatically select and establish the appropriate communication path without user intervention. The network nodes autonomously determine whether to route calls through circuit-switched or packet-switched networks based on current conditions, hiding the complexity from users while maintaining versatile communication options.

The patent introduces network nodes as intermediaries that manage the complexity of network selection. These nodes act as mediators between the user terminal and the actual communication path, automatically handling the decision-making process of routing selection and presenting a simplified interface to users while maintaining access to multiple network types.