Method and apparatus in which call signaling messages bypass in-transparent switching nodes or networks
View Patent ↗A method is disclosed for initiating a call in a communication network between a first signaling entity and a second signaling entity each connected to a respective node and the nodes connected to a network wherein communications between the signaling entities and the nodes are conducted using a first protocol and communications are carried over the network using a second protocol. Call setup information is also exchanged between the first node and the second node over a separate connection.
1. A method for initiating a call in a communication network between a first signaling entity and a second signaling entity each connected to a node and the nodes connected to a network wherein communications between the signaling entities and the nodes is conducted using a first protocol and communications are carried over the network using a second protocol, the first protocol being different than the second protocol, comprising:
sending a request for call setup using the first protocol from a first signaling entity to a first node;
converting the request for call setup from the first protocol to the second protocol in the first node;
sending the call setup request converted into the second protocol from the first node via a network to a second node that is connected to a second signaling entity;
converting the call setup request received from the first node from the second protocol to the first protocol in the second node;
establishing a separate connection between the first node and the second node over which communications are sendable using the first protocol;
the second node requesting data from the call setup request in the first protocol sent by the first signaling entity to the first node from the first node via the separate connection;
the first node sending information concerning the data from the call setup request in the first protocol sent by the first signaling entity to the second node via the separate connection; and
transmitting messages between the first node and the second node via the separate connection using the first protocol.
2. The method of claim 1 further comprising:
the second node creating a call setup request in the first protocol and sending that call setup request to the second signaling entity;
the second signaling entity sending a confirmation message to the second node for establishing a connection between the first signaling entity and the second signaling entity; and
the second node transmitting the confirmation message from the second signaling entity to the first node via the separate connection.
3. The method of claim 1 further comprising transmitting other messages between the first node and the second node over the network using the second protocol.
4. The method of claim 1 wherein the first protocol is SIP protocol and the second protocol is QSIG protocol.
5. The method of claim 1 wherein the network is an in-transparent network and any messages that are relevant to the operation of the network are transmitted over the network using the second protocol and the method further comprises the second node forwarding information concerning the separate connection to the first node over the network using the second protocol.
6. The method of claim 1 wherein the first node translation of the call setup request received from the first signaling entity is translated into the second protocol without translating all parameters or data of the call setup request in the first protocol received from the first signaling entity.
7. The method of claim 1 wherein correlation data are created by the first node that identify the first node and sent via the network to the second node together with the call setup request.
8. The method of claim 1 wherein the first and second signaling entities are each one of a communication endpoint, a telephone, a computer device, a cell phone, a terminal device, a user device and a signaling device of a trunk.
9. A communications system comprising:
a communication network;
a first signaling entity connected to the network through a first node;
a second signaling entity connected to the network through a second node;
wherein communications between the nodes and the signaling entities are conducted using a first protocol and communications are carried over the network using a second protocol that is different from the first protocol; and
wherein the nodes have the capability of translating messages received from the signaling entities in a format according to the first protocol to a format according to the second protocol for transmission over the network using the second protocol;
a communication path separate from the network between the first node and the second node over which messages are sent using the first protocol;
wherein the nodes and signaling entities are configured to support a request for call setup using the first protocol from a first signaling entity to a first node by being configured:
to convert the request for call setup from the first protocol to the second protocol in the first node;
to send the call setup request converted into the second protocol from the first node to a second node that is connected to a second signaling entity via a network;
to convert the call setup request received from the first node from the second protocol to the first protocol in the second node; wherein the second node is configured to request data from the call setup request in the first protocol sent by the first signaling entity to the first node from the first node via the separate connection; and
the first node is configured to send information concerning the data from the call setup request in the first protocol sent by the first signaling entity to the second node via the separate connection; and to transmit messages between the first node and the second node via the separate connection using the first protocol.
10. The communication system of claim 9 wherein the first signaling entity is one of a communication endpoint, a telephone, a computer device, a cell phone, a terminal device, a user device and a signaling device of a trunk; and
wherein the second signaling entity is one of a communication endpoint, a telephone, a computer device, a cell phone, a terminal device, a user device and a signaling device of a trunk.
11. The communication system of claim 9 wherein the first protocol is SIP protocol and the second protocol is QSIG protocol.