US 12,273,399 B2
Device, method, program, and information provision system for telephone number research
Yasunori Kawakami, Tokyo (JP)
Assigned to CLOVER NETWORK COM CO ., LTD., Tokyo (JP)
Appl. No. 17/760,373
Filed by CLOVER NETWORK COM CO., LTD., Tokyo (JP)
PCT Filed Oct. 26, 2021, PCT No. PCT/JP2021/039547
§ 371(c)(1), (2) Date Aug. 9, 2022,
PCT Pub. No. WO2022/123942, PCT Pub. Date Jun. 16, 2022.
Claims priority of application No. 2020-202918 (JP), filed on Dec. 7, 2020.
Prior Publication US 2023/0291774 A1, Sep. 14, 2023
Int. Cl. H04M 7/00 (2006.01); H04B 1/38 (2015.01); H04L 12/66 (2006.01); H04L 65/1016 (2022.01); H04L 65/1069 (2022.01); H04L 65/1101 (2022.01); H04L 65/40 (2022.01); H04L 65/65 (2022.01); H04M 1/64 (2006.01); H04M 7/12 (2006.01); H04M 19/04 (2006.01); H04W 8/00 (2009.01); H04W 72/04 (2023.01); H04W 80/10 (2009.01)
CPC H04L 65/1069 (2013.01) [H04L 65/1016 (2013.01); H04L 65/65 (2022.05)] 11 Claims
OG exemplary drawing
 
1. A telephone number research device configured to be connected via a next-generation network (NGN) to a telephone connected to at least a destination network that is an IP multimedia subsystem (IMS) network or a voice over IP (VoIP) network, the device being characterized in comprising:
a message exchange controller configured to add a first session description protocol (SDP) parameter to an INVITE request for the telephone to be researched, send the INVITE request to the destination network selected by the NGN, and receive a first response message from the destination network; and
a telephone number research determination unit configured to determine a usage status of a telephone number of the telephone based on the first response message,
wherein
the INVITE request does not include a signal that causes the telephone to ring for an incoming call,
the first SDP parameter includes at least an IPv6 network protocol,
a session border controller (SBC) has a function to convert the IPv6 network protocol to an IPv4 network protocol suitable for the destination network when the first SDP parameter is sent from the NGN to the destination network,
the message exchange controller is further configured to:
determine that the destination network is the VoIP network when the first response message is “200 OK” or the first SDP parameter has been converted, and
determine that the destination network is the IMS network when the first SDP parameter has not been converted and the first response message includes a first error code, and
the usage status of the telephone number indicates at least whether the telephone number is valid or invalid.