# US 7,609,663 B2 · Method for establishing a communication connection in a direct communication network > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,609,663 B2 - Document ID: US7609663B2 - Status: Granted - Kind: B2 - Application number: 10/573,676 - Filed: 2004-08-13 - Published: 2007-01-04 - Granted: 2009-10-27 - Earliest claimed: 2003-09-26 - Assignees: Siemens Aktiengesellschaft - Inventors: Ralf Neuhaus; Rainer Uecker - Web page: https://patentgrep.com/patent/US7609663B2 ## CPC - H04L 67/104: Peer-to-peer [P2P] networks - H04L 61/4535: using an address exchange platform which sets up a session between two nodes, e.g. rendezvous servers, session initiation protocols [SIP] registrars or H.323 gatekeepers - H04L 61/4552: Lookup mechanisms between a plurality of directories; Synchronisation of directories, e.g. metadirectories - H04L 65/1106: Call signalling protocols; H.323 and related - H04M 3/54: Arrangements for diverting calls for one subscriber to another predetermined subscriber {(based on the calling party profile H04M3/42059; based on location H04M3/42348; based on presence H04M3/42365; to voice mail H04M3/53308)} - H04M 7/0063: {where the network is a peer-to-peer network} - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) - H04M: TELEPHONIC COMMUNICATION (circuits for controlling other apparatus via a telephone cable and not involving telephone switching apparatus G08) ## Abstract A method for establishing a communication connection between two subscribers of a plurality of subscribers in a direct communication network is provided. Subscriber address information required for establishing paired communication connections between the subscribers is stored in the plurality of subscribers in a distributed manner; a searching subscriber sends a broadcast request message aimed at the establishment of at least one communication connection between a calling subscriber and at least one sought subscriber; each subscriber receiving the broadcast request message sends a response message containing subscriber address information required for the at least one communication connection, provided that the emission of a response message is associated therewith according to the respective functionality thereof; and said subscriber address information is then used to establish the communication connection between the calling subscriber and the at least one sought subscriber. ## Claims ### Claim 1 A method for setting up a communication link between a plurality of clients in a communication network, comprising: storing client address information in a distributed form for the plurality of clients; establishing a waiting communication link between a sought client and a waiting destination client; the waiting, destination client sending a waiting destination descriptor; transmitting a broadcast request message from a searching client; the waiting destination client sending a response message comprising a client address information to the searching client; and the waiting destination client sending signaling information configured for setting up the communication link between the searching client and the sought client. ### Claim 2 (depends on 1) The method according to claim 1 wherein the client address information is stored in at least one database. ### Claim 3 (depends on 2) The method according to claim 2, wherein the stored client address information describe clients in a call transfer group, wherein the broadcast message is transmitted to the call transfer group clients described in the stored client address information, and wherein the clients involved in the communication link are in a free operating state at a start of the sending of signaling information. ### Claim 4 (depends on 1) The method according to claim 1 wherein the signaling information is rejected or not answered within a time period by the sought client; and wherein the broadcasted message includes an identifier for the sought client, and wherein the client address information in the response message is for a call diversion client. ### Claim 5 (depends on 1) The method according to claim 1 wherein the signaling information is sent in a diversion message. ### Claim 6 (depends on 5) The method according to claim 5, wherein the response message is comprised of a client address information item. ### Claim 7 (depends on 1) The method according to claim 1 wherein the searching client belongs to a call transfer group, and the method further comprising transferring the waiting communication link to the searching client using the stored client address information that describes clients in the call transfer group. ### Claim 8 (depends on 1) The method according to claim 1 wherein the communication link is formed from transferring the waiting communication link to the searching client via the waiting destination client. ### Claim 9 (depends on 8) The method according to claim 8, wherein the sought client is a client in a call transfer group, wherein the client address information in the response message is for the sought client, and wherein the communication link is set up between the searching client and the sought client. ### Claim 10 (depends on 1) The method according to claim 1 wherein the stored client address information describe clients in a group. ### Claim 11 (depends on 1) The method according to claim 1 wherein the communication network is a directly communicating communication network. ### Claim 12 (depends on 11) The method according to claim 11, wherein the waiting destination descriptor is sent to the searching client. ### Claim 13 (depends on 11) The method according to claim 11, wherein the sending of signaling information is effected by the sending of the response message to the searching client. ### Claim 14 (depends on 1) The method according to claim 1 wherein the client address information in the response message is stored by the searching client in a database, and wherein the database is accessed to set up the communication link. ### Claim 15 (depends on 1) The method according to claim 1 wherein the broadcast message comprises at least one filter criterion for selecting particular clients, and wherein the waiting destination client meets the at least one filter criterion. ### Claim 16 (depends on 1) The method according to claim 1 wherein the broadcast message comprises at least on filter criterion for selecting particular clients, and wherein the waiting destination client has a property that meets the at least on filter criterion.