Network switching system with asynchronous and isochronous interface
First Claim
1. A method performed by a gateway device, comprising:
- receiving, by the gateway device, a connection request for placing a call to a destination device;
securing, by the gateway device, a transmission isochronous channel for transmission of the call;
securing, by the gateway device, a reception isochronous channel for reception of the call;
transmitting, by the gateway device, a call-out signal to the destination device;
determining, by the gateway device, whether the destination device responds to the call-out signal;
establishing the call over the transmission and reception isochronous channels when the destination device responds to the call-out signal;
detecting, by the gateway device, an end to the call; and
releasing, by the gateway device, the transmission and reception isochronous channels upon detecting the end to the call.
0 Assignments
0 Petitions
Accused Products
Abstract
To provide a switching system with telephone switching function mainly on the basis of hardware processing by using isochronous channel which is a real time communication channel. The switching system comprises a gateway node connected with ISDN (Integrated Services Digital Network) and PSTN (Public Switched Telephone Network), and one or more extension nodes, and a serial bus such as IEEE 1394 bus. The gateway node transforms data rate of outside line into data rate of extension node, and the other way around, and secure a seamless communication channel. Concretely, the gateway node secures an isochronous channel, according to a request from the extension nodes or the outside line, and executes switching such as transfer or reservation. A resource manager holds a table for managing the gateway node and extension node.
-
Citations
23 Claims
-
1. A method performed by a gateway device, comprising:
-
receiving, by the gateway device, a connection request for placing a call to a destination device; securing, by the gateway device, a transmission isochronous channel for transmission of the call; securing, by the gateway device, a reception isochronous channel for reception of the call; transmitting, by the gateway device, a call-out signal to the destination device; determining, by the gateway device, whether the destination device responds to the call-out signal; establishing the call over the transmission and reception isochronous channels when the destination device responds to the call-out signal; detecting, by the gateway device, an end to the call; and releasing, by the gateway device, the transmission and reception isochronous channels upon detecting the end to the call. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
-
-
11. A method performed by a gateway device, comprising:
-
receiving, by the gateway device, a connection request for placing a call to an extension node connected to the gateway device; sending, by the gateway device, a call signal to the extension node, where the call signal is associated with the call; determining, by the gateway device, whether the extension node responds to the call signal; securing, by the gateway device, first and second isochronous channels for the call when the extension node responds to the call signal; and establishing the call over the first and second isochronous channels. - View Dependent Claims (12, 13, 14)
-
-
15. A gateway device connected to an extension node via a serial bus and a destination node via the serial bus or an external network, the gateway device comprising:
-
a memory; and a processor, connected to the memory, to; receive, from the extension node and via the serial bus, a connection request for placing a call to the destination node, secure first and second isochronous channels for the call, transmit a call-out signal to the destination node, determine that the destination node responds to the call-out signal, and establish the call over the first and second isochronous channels when the destination node responds to the call-out signal. - View Dependent Claims (16, 17, 18, 19, 20)
-
-
21. A gateway device connected to an extension node via a serial bus and a source node via the serial bus or an external network, the gateway device comprising:
-
a memory; and a processor, connected to the memory, to; receive, from the source node, a connection request for placing a call to the extension node, send a call signal, associated with the call, to the extension node via the serial bus, determine that the extension node responds to the call signal, secure a bidirectional isochronous channel for the call when the extension node responds to the call signal, and establish the call over the bidirectional isochronous channel. - View Dependent Claims (22, 23)
-
Specification