Integration of call signaling and resource management for IP telephony

A method to efficiently integrate Internet Telephony call signaling with dynamic resource negotiation

“…The users (1)(2)(3)(4)(5)(6)(7)(8)(9)(10) in group A try to make call connections to the users (11)(12)(13)(14)(15)(16)(17)(18)(19)(20) in group B, using the parallel and sequential signaling approaches, separately. The 10 users in group A send out the call invitations to group B users in turn, with the interval of 50 s. One user in group A and another user in group B comprise a call connection pair.…”

“…Also, many commercial routers provide support to RSVP. 2 As a signaling protocol, RSVP has different functionalities in different QoS mechanisms. In IntServ, RSVP is used for specifying resource requirements of realtime flows.…”

“…However, these two protocols need to be coordinated during call setup to ensure media quality. A number of studies on the integration of call signaling with resource negotiation can be found in the literature [1][2][3]. Most of them propose to combine SIP with RSVP in a sequential manner.…”

On overlapping resource management and call setup signaling: a new signaling approach for internet multimedia applications

“…The cooperation between session control signaling and resource management has been previously addressed in the literature [1,2,6,12,20,23]. Their approaches vary in terms of architectural complexity, level of integration, and type of interaction between session control and resource reservation protocols.…”

“…Their approaches vary in terms of architectural complexity, level of integration, and type of interaction between session control and resource reservation protocols. In particular, the works in [6,12] adopt the traditional telephony call setup model in which the end user is notified of the incoming call request only after resources have been successfully reserved for the call. In the Internet, however, this may incur in long call setup delays and a high call blocking rate ('no QoS/no call').…”