# US 9,521,577 B2 · Guidance device, guidance system, and guidance method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 9,521,577 B2 - Document ID: US9521577B2 - Status: Granted - Kind: B2 - Application number: 14/247,311 - Filed: 2014-04-08 - Published: 2014-11-20 - Granted: 2016-12-13 - Earliest claimed: 2013-05-15 - Assignees: Fujitsu Limited - Applicants: Fujitsu Limited - Inventors: Yoshinori Inoue; Yoshiaki Ohnishi - Web page: https://patentgrep.com/patent/US9521577B2 ## CPC - H04W 28/0289: {Congestion control (load shedding arrangements in network planning H04W16/08; performing reselection for handling the traffic H04W36/22; wireless traffic scheduling H04W72/12)} - H04W 76/12: Setup of transport tunnels - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) ## Abstract A guidance device includes an audio guidance transmission unit configured to transmit audio guidance to encourage refraining from a call reoriginating operation to a caller terminal when first identification information to identify a first exchange that is in a congestion state and second identification information to identify the caller terminal are received from the first exchange, and a connection control unit configured to cause the caller terminal and a callee terminal to be connected through a second exchange that is not in the congestion state based on the received first identification information, the received second identification information, and presence or absence of the congestion state of exchanges under management. ## Claims ### Claim 1 A guidance device comprising: an audio guidance transmission unit configured to transmit audio guidance to encourage refraining from a call reoriginating operation to a caller terminal when first identification information to identify a first exchange that is in a congestion state and second identification information to identify the caller terminal are received from the first exchange; and a connection control unit configured to cause the caller terminal and a callee terminal to be connected through a second exchange that is not in the congestion state based on the received first identification information, the received second identification information, and presence or absence of the congestion state of exchanges under management. ### Claim 2 (depends on 1) The guidance device according to claim 1, wherein the connection control unit causes the caller terminal and the callee terminal to be connected through the second exchange by transmitting an instruction to the second exchange to hold subscriber information for processing a call control signal transmitted from the caller terminal. ### Claim 3 (depends on 1) The guidance device according to claim 1, further comprising: an identification information management unit configured to, when third identification information to identify the callee terminal is received together with the second identification information, manage the received second identification information and the received third identification information as a pair, wherein the connection control unit causes the caller terminal and the callee terminal to be connected based on the second identification information and the third identification information that are managed by the identification information management unit. ### Claim 4 (depends on 2) The guidance device according to claim 2, further comprising: an identification information management unit configured to, when third identification information to identify the callee terminal is received together with the second identification information, manage the received second identification information and the received third identification information as a pair, wherein the connection control unit causes the caller terminal and the callee terminal to be connected based on the second identification information and the third identification information that are managed by the identification information management unit. ### Claim 5 (depends on 3) The guidance device according to claim 3, wherein the identification information management unit allocates a reservation order that indicates a connection reservation order to the pair of the second identification information and the third identification information, and the connection control unit causes the caller terminal and the callee terminal to be connected based on the reservation order. ### Claim 6 (depends on 4) The guidance device according to claim 4, wherein the identification information management unit allocates a reservation order that indicates a connection reservation order to the pair of the second identification information and the third identification information, and the connection control unit causes the caller terminal and the callee terminal to be connected based on the reservation order. ### Claim 7 (depends on 2) The guidance device according to claim 2, wherein the subscriber information is transmitted from a controller that controls a communication service to the second exchange based on the second identification information. ### Claim 8 (depends on 3) The guidance device according to claim 3, wherein the subscriber information is transmitted from a controller that controls a communication service to the second exchange based on the second identification information. ### Claim 9 (depends on 4) The guidance device according to claim 4, wherein the subscriber information is transmitted from a controller that controls a communication service to the second exchange based on the second identification information. ### Claim 10 (depends on 5) The guidance device according to claim 5, wherein the subscriber information is transmitted from a controller that controls a communication service to the second exchange based on the second identification information. ### Claim 11 (depends on 6) The guidance device according to claim 6, wherein the subscriber information is transmitted from a controller that controls a communication service to the second exchange based on the second identification information. ### Claim 12 A guidance system comprising: a first exchange that is in a congestion state; a second exchange that is not in the congestion state; and a guidance device configured to transmit audio guidance to encourage refraining from a call re-originating operation to a caller terminal when first identification information to identify the first exchange and second identification information to identify the caller terminal are received from the first exchange, and causes the caller terminal and a callee terminal to be connected through the second exchange based on the received first identification information, the received second identification information, and presence or absence of a congestion state of an exchange under management. ### Claim 13 A guidance method comprising: transmitting audio guidance to encourage refraining from a call reoriginating operation to a caller terminal when first identification information to identify a first exchange that is in a congestion state and second identification information to identify the caller terminal are received from the first exchange; and causing the caller terminal and a callee terminal to be connected through a second exchange that is not in the congestion state based on the received first identification information, the received second identification information, and presence or absence of the congestion state of exchanges under management, executed by a processor.