# US 2013/0159524 A1 · Communication device, communication system, and session control method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2013/0159524 A1 - Document ID: US20130159524A1 - Status: Published application - Kind: A1 - Application number: 13/688,440 - Filed: 2012-11-29 - Published: 2013-06-20 - Earliest claimed: 2011-12-20 - Assignees: Fujitsu Limited - Inventors: Masaki Takahashi; Hideki Iwamura; Hiroaki Komine; Takafumi Yamashina; Junichi Nishi - Web page: https://patentgrep.com/patent/US20130159524A1 ## CPC - H04L 65/1066: Session management - H04L 45/00: Routing or path finding of packets in data switching networks (routing or path finding in wireless networks H04W40/00) - H04L 65/1104: Session initiation protocol [SIP] - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract A communication device includes a storage device configured to store plural addresses assigned to the communication device, a user interface device, and a controller, wherein the controller executes processing that accepts an input of a user due to the user interface device, and address switching processing that causes a transmission destination address, used by an opposite device to transmit data to the communication device, to be switched to another address included in the plural addresses in accordance with the session control protocol, in response to the input. ## Claims ### Claim 1 A communication device that performs communication through an IP network in accordance with a session control protocol, the communication device comprising: a storage device configured to store plural addresses assigned to the communication device; a user interface device; and a controller, wherein the controller executes processing that accepts an input of a user due to the user interface device, and address switching processing that causes a transmission destination address, used by an opposite communication device to transmit data to the communication device, to be switched to another address included in the plural addresses in accordance with the session control protocol, in response to the input. ### Claim 2 (depends on 1) The communication device according to claim 1, wherein the plural addresses are addresses where different routes are preliminarily assigned to route control devices in the IP network. ### Claim 3 (depends on 2) The communication device according to claim 2, wherein the route control devices transfer packets in accordance with route information associating the plural addresses with different transfer destinations. ### Claim 4 (depends on 1) The communication device according to claim 1, wherein the controller executes processing that stores an address used at the end of a session, in the storage device, and processing that designates the address used at the end of the session, as a transmission destination address in accordance with the session control protocol at the start of a session, the transmission destination address being used by the opposite communication device, which communicates with the communication device, to transmit data to the communication device. ### Claim 5 (depends on 1) The communication device according to claim 1, wherein priority orders among the plural addresses are stored in the storage device, and the controller executes processing that selects a transmission destination address caused to be used by the opposite communication device in the address switching processing, in accordance with the priority orders. ### Claim 6 (depends on 1) The communication device according to claim 1, wherein priority orders among the plural addresses are stored in the storage device, and the controller executes processing that designates an address whose priority order is the highest among the plural addresses, as a transmission destination address in accordance with the session control protocol at the start of a session, the transmission destination address being used by the opposite communication device, which communicates with the communication device, to transmit data to the communication device. ### Claim 7 (depends on 6) The communication device according to claim 6, wherein the controller executes processing that selects a transmission destination address caused to be used by the opposite communication device in the address switching processing, in accordance with the priority orders. ### Claim 8 A communication system comprising: an IP network; and a communication device configured to perform communication through the IP network in accordance with a session control protocol, wherein in route control devices in the IP network, different routes are preliminarily set for plural addresses assigned to the communication device, and the communication device includes a storage device configured to store the plural addresses, a user interface device, and a controller, wherein the controller executes processing that accepts an input of a user due to the user interface device, and address switching processing that causes a transmission destination address to be switched to another address included in the plural addresses in accordance with the session control protocol in response to the input, the transmission destination address being used by an opposite communication device, which communicates with the communication device, to transmit data to the communication device. ### Claim 9 (depends on 8) The communication system according to claim 8, further comprising: a route setting device configured to set route information indicating a packet transfer destination, in the route control device, wherein the route setting device includes a controller that executes processing that determines, with respect to each of the communication devices, a plurality of packet transfer destinations used for transferring a packet to the communication device, with respect to each of the route control devices, processing that generates route information associating the plural addresses included in each of the communication devices with the plural transfer destinations determined with respect to each of the communication devices, and processing that sets the route information in the route control device. ### Claim 10 (depends on 8) The communication system according to claim 8, wherein the controller executes processing that stores an address used at the end of a session, in the storage device, and processing that designates the address used at the end of the session, as a transmission destination address in accordance with the session control protocol at the start of a session, the transmission destination address being used by the opposite communication device, which communicates with the communication device, to transmit data to the communication device. ### Claim 11 (depends on 8) The communication system according to claim 8, wherein priority orders among the plural addresses are stored in the storage device, and the controller executes processing that selects a transmission destination address caused to be used by the opposite communication device in the address switching processing, in accordance with the priority orders. ### Claim 12 (depends on 8) The communication system according to claim 8, wherein priority orders among the plural addresses are stored in the storage device, and the controller executes processing that designates an address whose priority order is the highest among the plural addresses, as a transmission destination address in accordance with the session control protocol at the start of a session, the transmission destination address being used by the opposite communication device, which communicates with the communication device, to transmit data to the communication device. ### Claim 13 (depends on 12) The communication system according to claim 12, wherein the controller executes processing that selects a transmission destination address caused to be used by the opposite communication device in the address switching processing, in accordance with the priority orders. ### Claim 14 A session control method that controls a session due to a communication device performing communication through an IP network in accordance with a session control protocol, wherein the communication device includes a storage device configured to store plural addresses assigned to the communication device, a user interface device, and a controller, wherein the session control method causes the controller to execute processing that accepts an input of a user due to the user interface device, and address switching processing that causes a transmission destination address, used by an opposite communication device to transmit data to the communication device, to be switched to another address included in the plural addresses in accordance with the session control protocol, in response to the input.