VOIP DENIAL-OF-SERVICE PROTECTION MECHANISMS FROM ATTACK

摘要

A system and method for providing advanced voice services in a wireless communications network. The system also interfaces to an Internet Protocol (IP) network to perform the advanced voice services for mobile units in the IP network and includes a protection mechanism against Voice-over-IP (VoiP) Denial-of-Service (DoS) attacks utilizing Advanced Group Services (AGS).

主权项

1. A system for providing advanced voice services in one or more wireless communications networks, comprising:
one or more servers that interface to the wireless communications networks to perform advanced voice services for one or more mobile units in the wireless communications networks, wherein the advanced voice services include an instant two-way half-duplex voice call within a group of the mobile units comprising a Push-to-Talk-over-Cellular (PoC) call session; wherein both the servers and the mobile units that use the advanced group services communicate with each other using control messages within the wireless communications networks, and at least one of the servers switches voice messages for the advanced group services between the mobile units across the wireless communications networks; wherein at least one of the servers manages the PoC call session by acting as an arbitrator for the PoC call session and controls the sending of the control messages and the voice messages to and from the mobile units; and wherein at least one of the servers interfaces to an Internet Protocol (IP) network to perform the advanced voice services for the mobile units in the IP network and includes a protection mechanism against denial-of-service (DoS) attacks that may disrupt the system.