# US 10,313,843 B2 · Call processing system and method based on answer mode of push to talk over cellular user > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,313,843 B2 - Document ID: US10313843B2 - Status: Granted - Kind: B2 - Application number: 14/923,039 - Filed: 2015-10-26 - Published: 2016-02-11 - Granted: 2019-06-04 - Earliest claimed: 2004-09-24 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Sang-Kyung Sung; Joon-Goo Park; Sung-Jin Park - Web page: https://patentgrep.com/patent/US10313843B2 ## CPC - H04W 4/10: Push-to-Talk [PTT] or Push-On-Call services - H04L 65/1016: IP multimedia subsystem [IMS] - H04L 65/4061: Push-to services, e.g. push-to-talk or push-to-video - H04L 65/65: Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP] - H04W 72/30: Resource management for broadcast services - H04W 76/45: for Push-to-Talk [PTT] or Push-to-Talk over cellular [PoC] services - H04W 80/10: adapted for {application} session management, e.g. SIP [Session Initiation Protocol] {(connection management H04W76/00; arrangements for session management H04L67/14)} - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract Call processing methods and apparatuses are provided in a Session Initiation Protocol (SIP) based network involving at least one Push-to-Talk (PTT) over Cellular PoC client and a reception side PoC server. The reception side PoC server receives an INVITE request including a Manual Answer Override (MAO) indication from a transmission side PoC server. The MAO indication is for establishing an auto-answer mode in a pre-established session. If a reception side PoC client has the pre-established session with the reception side PoC server, the reception side PoC server sends an OK response to the transmission side PoC server in response to the INVITE request. The reception side PoC server sends a communication connection request including the MAO indication to the reception side PoC client. The MAO indication is used to determine that a transmission side PoC client is an authorized user with respect to the reception side PoC client. ## Claims ### Claim 1 A method for processing a call with a client through Push to Talk (PTT) over Cellular (PoC), in a first server, the method comprising: receiving an INVITE request including a Manual Answer Override (MAO) indication from a second server, wherein the MAO indication is for initiating an auto-answer mode in a pre-established session between the first server and a first client; determining, using the MAO indication, whether a second client connected to the second server is authorized by the first client and the first client has a pre-established session with the first server; if the second client is authorized by the first client and the first client has the pre-established session with the first server, sending an OK response to the second server in response to the INVITE request; and sending a communication connection request including the MAO indication to the first client. ### Claim 2 (depends on 1) The method of claim 1, further comprising: establishing a session between the first server and the first client during which media parameters that the first client intends to use are negotiated between the first client and the first server. ### Claim 3 (depends on 1) The method of claim 1, wherein the communication connection request is sent by using a talk burst signal. ### Claim 4 (depends on 3) The method of claim 3, wherein the talk burst signal is implemented in a payload format of a Real-time Transport Control Protocol (RTCP) packet by the first server. ### Claim 5 (depends on 1) The method of claim 1, wherein the INVITE request includes address information of the first client, address information of the second client, or the MAO indication. ### Claim 6 (depends on 5) The method of claim 5, wherein sending the OK response is enabled based on the MAO indication and media parameters that were previously negotiated between the first server and the first client. ### Claim 7 (depends on 5) The method of claim 5, wherein the communication connection request includes the address information of the second client or the MAO indication. ### Claim 8 (depends on 1) The method of claim 1, further comprising: receiving the communication connection request including the MAO indication from the second client, after sending the OK response to the second server. ### Claim 9 (depends on 1) The method of claim 1, wherein the OK response indicates establishment of a call connection to the second client in response to the INVITE request without forwarding the INVITE request to the first client. ### Claim 10 A first server for processing a call with a client through Push to Talk over Cellular (PoC), comprising: a transceiver configured to receive an INVITE request including a Manual Answer Override (MAO) indication from a second server, wherein the MAO indication is for initiating an auto-answer mode in a pre-established session between the first server and a first client; and a processor configured to: determine, using the MAO indication, whether a second client connected to the second server is authorized by the first client and the first client has a pre-established session with the first server; if the second client is authorized by the first client and the first client has the pre-established session with the first server, control the transceiver to send an OK response to the second server in response to the INVITE request; and control the transceiver to send a communication connection request including the MAO indication to the first client. ### Claim 11 (depends on 10) The first server of claim 10, wherein the processor is further configured to: establish a session between the first server and the first client during which media parameters that the first client intends to use are negotiated between the first client and the first server. ### Claim 12 (depends on 10) The first server of claim 10, wherein the communication connection request is sent by using a talk burst signal. ### Claim 13 (depends on 12) The first server of claim 12, wherein the talk burst signal is implemented in a payload format of a Real-time Transport Control Protocol (RTCP) packet by the first server. ### Claim 14 (depends on 10) The first server of claim 10, wherein the INVITE request includes address information of the first client, address information of the second client, or the MAO indication. ### Claim 15 (depends on 14) The first server of claim 14, wherein sending the OK response is enabled based on the MAO indication and media parameters that were previously negotiated between the first server and the first client. ### Claim 16 (depends on 14) The first server of claim 14, wherein the communication connection request includes the address information of the second client or the MAO indication. ### Claim 17 (depends on 10) The first server of claim 10, wherein the processor is further configured to: control the transceiver to receive the communication connection request including the MAO indication from the second client, after sending the OK response to the second server. ### Claim 18 (depends on 10) The first server of claim 10, wherein the OK response indicates establishment of a call connection to the second client in response to the INVITE request without forwarding the INVITE request to the first client.