Lg Electronics Inc.

Huh, Kang-suk

Kang-Suk Huh

Kyung-Ae Yoon

Dong-Young Lee

Young-Ae Kim

Sung-Mu Son

Christophe Le Thierry D'Ennequin

Hyeon-Soo Lee

Dong-Hee Shim

Young-Hwan Park

Hee-Joung Lee

Jong-Chul Park

Kyu-Sung Han

Jong Chul Park

Young June Park

Sung-Bum Choi

Yong-Suk Lim

Chan-Seok Lim

Jong-Sook Kim

Chan Seok Lim

Sung Bum Choi

Young-Ae Cheolsan Jugong 8-Danji Apt 849-204 Kim

A PT (Push-To) service among SIP based session services, and particularly, a method and terminal for establishing a PT session in order to allow a certain user to use a PT box service under control of a PT server in a SIP (Session Initiation Protocol) based service, are discussed. According to an embodiment, the method of providing a Push-To (PT) box service, includes storing, in a PT server, PT box setting information of a terminal; receiving, by the PT server, a session invitation directed to the terminal; and determining, by the PT server, a routing of the session invitation to a PT box for the terminal based on at least the PT box setting information.

Method and terminal for establishing PT session in order to use PT box

A method for delivering a message from a converged IP messaging (CPM) server include: checking registered target terminals that can receive a message from a source terminal based on a user preference; determining whether to deliver a message from the source terminal to the checked target terminal based on the user preference; when the message is determined to be delivered, determining whether to store the message in a message storage server based on the user preference; when the message is determined to be stored, requesting the message storage server to store the message; receiving a response message including information regarding the stored message from the message storage server; and including the information in the message and transmitting the same to the target terminal.

Method for delivering message based on CPM service and server thereof

A method that includes receiving a message generated by a source terminal of a requestor; if there are one or more target terminals capable of receiving the message, among plural target terminals of a recipient, transmitting the message to the one or more target terminals, respectively; and transmitting a response message to the source terminal. Also is a method that includes: receiving, from a server, a message generated by a target terminal of a requestor; transmitting, from the mobile terminal to the server, a response message in response to the received message; generating, by the mobile terminal, a reply message in response to the message received from target terminal; transmitting the generated replay message to the server; and synchronizing with the server to receive another message, the another message having been generated by another terminal owned by a same user and intended to be transmitted to the target terminal.

Method for delivering CPM message and server thereof

Disclosed are an XML document management method for cancelling a specific past operation, and a system using the same. The method comprises identifying an original operation to be cancelled, identifying an XML resource to be cancelled, identifying a previous value of the XML resource to be cancelled, identifying a next value of the XML resource to be cancelled, configuring a cancel operation, and applying the cancel operation to the XML resource to be cancelled.

Method of XML document management to selectively cancel specific past operation and system using the same

Disclosed is a method and apparatus for determining a controlling PT server. A mobile communication terminal transmits a group generation request message to a PT XDMS, and the PT XDMS determines a specific PT server having the largest number of members as a controlling PT server. The PT XDMS generates group identity information by using an address of the specific PT server, and transmits a group generation response message including the group identity information to the mobile communication terminal. Then, the mobile communication terminal transmits the group identity information of the group generation response message to a PT server with being included in an INVITE message. The PT server certifies the group identity information included in the INVITE message, and determines whether or not itself is to be operated as a controlling PT server.

Method and apparatus for determining PT server having controlling function

A PT (e.g., Push-To-Talk, Push-To-View or Push-To-Data) service, and more particularly, to a method and device for controlling a floor (talk burst authority, permission to send media burst, etc.) in a PT service, are discussed. According to an embodiment, the method for controlling a state of a Push-To (PT) server, includes starting, by a PT server, a stop talking (T) timer which is a type of media burst control timer that operates with respect to a terminal having permission to send a media burst; checking, by the PT server on expiry of the Ttimer, whether a media burst release message was already received while the Ttimer was running; and entering, by the PT server, a media burst idle state if the media burst release message was already received as a result of the checking step.

Method and device for controlling floor in push to service

Disclosed is a method for delivering a message in a converged IP messaging (CPM) server. The message delivery method may include determining whether to reject a CPM message based on the access policy if the CPM message is received; checking a user preference of a target terminal to determine processing of the CPM message if it is determined that the CPM message is not rejected; determining whether to reject, defer or store the CPM message based on the user preference if the target terminal is not registered or in an unreceivable state; storing the CPM message in a queue if it is determined that a transmission of the CPM message is deferred; determining whether to discard or store the CPM message based on the user preference if a timer for the CPM message is expired; requesting to store the message to a message storage server if it is determined to be stored; receiving a response message including information on the stored message from the message storage server; and transmitting a message including the information on the store message to the terminal.

Disclosed is a method for transmitting a signal in a mobile communications system using a plurality of transmit/receive antennas. A method for transmitting a signal in accordance with an embodiment of the present invention comprises the steps of: a receiving end's calculating a signal to interference noise ratio (SINR) with respect to every antenna pairs configuring STTD pairs to be transmittable from a transmitting end; feedbacking information indicating an antenna pair having the greatest SINR to the transmitting end; and the transmitting end's performing a D-STTD transmission through the antenna pair determined by the feedbacked information. A method for transmitting a signal in accordance with another embodiment of the present invention comprises the steps of: a receiving end's feedbacking information of an antenna pair and/or an eigenvector (weight vector) of a channel matrix with respect to transmit antennas included in the space-time multiplexing (STTD) pair to a transmitting end; and the transmitting end's forming beam by multiplying a symbol with respect to each STTD pair by the eigenvector, and thereafter transmitting the beam through each transmit antenna (in case of using two antennas) or a transmit antenna pair (in case of using more than four antennas) determined by the information of the antenna pair.

Method for transmitting/receiving signal in MIMO system

A method, PT client device and PT server device for controlling transmission of media data, are discussed. According to an embodiment, the method includes starting, by a PT server, a timer when a media burst revoke message is transmitted to a PT client; stopping, by the PT server, the timer before the timer expires when last media data and a media burst release message are received from the PT client; and transmitting, by the PT server, a media burst idle message to the PT client when the timer is stopped.

Continuous permission to send media

A method of securing an invited Push-To (PT) user's privacy in an automatic answer mode of a PT service is discussed. According to an embodiment of the present invention, a method for performing a PT (Push-To) service setting procedure, includes transmitting PT service setting information of a PT client to a PT server during a PT service setting procedure, the PT service setting information including answer mode setting information and privacy information, the answer mode setting information indicating if an answer mode of the PT client is an automatic answer mode or a manual answer mode, the privacy information indicating whether or not an identity of the PT client is to be kept private in the answer mode; and storing the PT service setting information of the PT client in the PT server, whereby the PT server can selectively inform identification information of the PT client to another PT client based on the privacy information.

Method for securing privacy in automatic answer mode of push-to service

A group advertisement method in a SIP (Session Initiation Protocol) based message service, and a PT client device are discussed. According to an embodiment, the method includes receiving, by a PT server, a request to send a group advertisement message for a specific PT group from a requesting PT client; determining, by the PT server, if the specific PT group is a restricted chat group or a pre-arranged group; determining, by the PT server, if the requesting PT client is allowed to send a group advertisement based on a PT group document associated with the specific PT group; and selectively transmitting, by the PT server, the group advertisement message to at least one member of the specific PT group based on results of the determining steps.

Group advertisement method in SIP based message service

A method, PT client device and PT server device for controlling transmission of media data, are discussed. According to an embodiment, the method includes sending, by a PT client, media data to a PT server after receiving a talk burst grant from the PT server in response to a talk burst request message; entering, by the PT client, a first operation state after receiving a media burst revoke message from the PT server, wherein the PT client in the first operation state is unable to request permission to send media data to the PT server; and entering, by the PT client, a second operation state after receiving a media burst idle message from the PT server while the PT client is in the first operation state, wherein the PT client in the second operation state is able to request permission to send media data to the PT server.

Method and device for requesting permission to send media, and method and device for controlling push-to service

A user equipment (UE), method and system for controlling a simultaneous session are discussed. According to an embodiment, the system includes a UE to transmit a SIP message including simultaneous sessions support (SSS) setting information associated with the UE to a home network including a server; and the server to store the SSS setting information therein, and to set a session operation mode of the server for a simultaneous session of the UE based on, in part, the SSS setting information.

User equipment, method and system for simultaneous session control

A user equipment (UE), method and system for processing session based communications, are discussed. According to an embodiment, the method includes receiving a message from a terminal that informs whether the terminal supports simultaneous PT (push-to) sessions; recognizing that the terminal supports simultaneous PT sessions according to the received message; and transporting data to one or more terminals through the server operating in B2BUA (Back-to-Back User Agent) mode, wherein a simultaneous PT session refers to a session where the server performs a PT session priority function or a PT session locking function.

Growing community of inventors

Gyeonggi-do, South Korea

Kang-Suk Huh