Handoff system and method between different kinds of devices, SIP server and operational method of SIP server
First Claim
Patent Images
1. A handoff system between different kinds of wireless devices, the system comprising:
- a plurality of wireless devices comprising a source device and a target device;
a Session Initiation Protocol (SIP) server which requests a routing path update when a handoff request signal is input from the source device, and which gets the target device to participate in a current session; and
a gateway which updates a predetermined routing path when a request signal for the routing path update is input, and transmits data to the source device and the target device via the updated routing path,wherein when the handoff request signal is input, performing handoff by transferring the current session from an access node in a first network area to an access node of a second network area, wherein if a pause option is included in the handoff request signal, the SIP server maintains a current Real-time Transport Protocol (RTP) traffic flow with the source device and the target device.
2 Assignments
0 Petitions
Accused Products
Abstract
A handoff system and method between different kinds of devices, an SIP server and an application method of the SIP server applied thereto. The handoff system between different kinds of devices includes a plurality of devices; a SIP server which requests a routing path update when a handoff request signal is input from a source device among the plurality devices, and getting a target device to participate in a current session; and a gateway which updates a predetermined routing path when a request signal for the routing path update is input, and transmitting data to the source device and the target device via the updated routing path.
32 Citations
22 Claims
-
1. A handoff system between different kinds of wireless devices, the system comprising:
-
a plurality of wireless devices comprising a source device and a target device; a Session Initiation Protocol (SIP) server which requests a routing path update when a handoff request signal is input from the source device, and which gets the target device to participate in a current session; and a gateway which updates a predetermined routing path when a request signal for the routing path update is input, and transmits data to the source device and the target device via the updated routing path, wherein when the handoff request signal is input, performing handoff by transferring the current session from an access node in a first network area to an access node of a second network area, wherein if a pause option is included in the handoff request signal, the SIP server maintains a current Real-time Transport Protocol (RTP) traffic flow with the source device and the target device. - View Dependent Claims (2, 3, 4, 5, 6)
-
-
7. A handoff method between different kinds of wireless devices in a handoff system which performs a handoff from a source device to a target device among a plurality of devices, the method comprising:
-
if a handoff request signal is input from the source device, updating a predetermined routing path; getting the target device to participate in a current session; and transmitting data to the source device and the target device via the updated routing path, wherein when the handoff request signal is input, performing handoff by transferring the current session from an access node in a first network area to an access node of a second network area, wherein if a pause option is included in the handoff request signal, maintaining, by an SIP server, a current RTP traffic flow with the source device and the target device. - View Dependent Claims (8, 9, 10, 11, 12)
-
-
13. A Session Initiation Protocol (SIP) server used in a handoff system which performs a handoff between a source device and a target device among a plurality of different kinds of wireless devices, the SIP server comprising:
-
a device interface which receives a handoff request signal from the source device; a gateway interface which transmits a request signal for a routing path update; and a controller, which controls the gateway interface to transmit a request signal for the routing path update when the handoff request signal is received through the device interface, and gets the target device to participate in a current session, wherein when the handoff request signal is input, performing handoff by transferring the current session from an access node in a first network area to an access node of a second network area, wherein if a pause option is included in the handoff request signal, the controller maintains a current RTP traffic flow with the source device and the target device. - View Dependent Claims (14, 15, 16, 17, 18)
-
-
19. An operational method of a Session Initiation Protocol (SIP) server used in a handoff system which performs a handoff between a source device and a target device among a plurality of different kinds of wireless devices, the method comprising:
-
receiving a handoff request signal from the source device; transmitting an update request signal for a predetermined routing path; and getting the target device to participate in a current session, wherein when the handoff request signal is input, performing handoff by transferring the current session from an access node in a first network area to an access node of a second network area, if a pause option is included in the received handoff request signal, maintaining, by the SIP server, a current RTP traffic flow with the source device and the target device. - View Dependent Claims (20, 21, 22)
-
Specification