Lg Electronics Inc.

Sung-Mu Son

Dong-Hee Shim

Min-Jung Shon

Kyu-Sung Han

Kang-Suk Huh

Seung-Jae Lee

Te-Hyun Kim

Youn-Sung Chu

Kiran Kumar Keshavamurthy

An apparatus and method for transferring a Rights Object (RO) for a content between devices via a server, wherein a sending device converts a first RO taken by itself to encode into a second RO, and sends an RO move request message including the second RO to the server, whereas the server converts the second RO included in the RO move request message into a third RO and transfers the third RO to a receiving device, whereby the receiving device receives the third RO from the server for installation, wherein the sending device deletes or modifies the first RO at an appropriate time point.

Apparatus and method for moving rights object from one device to another device via server

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

A method and device for providing a broadcast/multicast service are discussed. According to an embodiment, the invention provides a method comprising: receiving, by a client module, a service guide including contents information with respect to one or more contents from a broadcast/multicast server; transmitting, by the client module, a broadcast/multicast request message with respect to contents selected by a user of a specific terminal among the contents information included in the received service guide to the broadcast/multicast server; transmitting, by the client module, a location tracking request message with respect to the specific terminal to a network entity; receiving a response message with respect to the location tracking request message, the response message including a location tracking result from the network entity; transmitting, by the client module, location information of the specific terminal to the broadcast/multicast server.

Broadcast/multicast service method based on user location information

A method and device for receiving a broadcast/multicast service as discussed. According to an embodiment, the invention provides a method of receiving a broadcast/multicast service by a terminal, the method comprising: receiving a service guide from a network including a broadcast/multicast server, the service guide being used by a user to select specific contents related to a broadcast/multicast service; transmitting information on the contents selected by the user, to the network; transmitting a content request to the network; and receiving contents from the network in response to the content request, wherein the received contents were further selected, among the contents selected by the user, by the broadcast/multicast server that performed an exact location tracking of the terminal to enable location based filtering of services corresponding to the contents selected by the user.

A broadcast/multicast (BCAST) service, specifically, a BCAST service system for transmitting broadcast contents to terminals when a network load is small and a contents transmission method using the same are disclosed. When contents are broadcast by using a distribution window (DM) and a presentation window (PW), the terminals feed back a message indicating reception confirmation of the contents to the network, such that the contents reception success rate between the terminals and the network can be improved.

BCAST service system and contents transmission method using the same

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 of digital rights management for a broadcast-multicast service, the method comprising receiving a request from a terminal to join a service domain having a common group key; transmitting encryption of one or more service encryption keys using the common group key to the terminal that requested to join; and allowing the terminal to share the same contents and the same services with one or more other devices within the service domain.

Method for managing digital rights in broadcast/multicast service

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 transiting, by a PT server in a second state, to a first state when a media burst release message is received by the PT server; and remaining, by the PT server, in the first state, if the PT server in the first state receives a media packet from a PT client and if the PT server in the previous second state has received the media burst release message.

In a broadcast/multicast service based on user location information, when a terminal sets contents desired to be received in a specific area, a broadcast/multicast server checks current location information of the terminal transmitted from a location server or from the corresponding terminal, selects contents provided in the corresponding area, and transmits it to the terminal. Thus, a waste of a communication channel can be prevented, and since a user can selectively receive contents or information according to his/her location, user's satisfaction and convenience can be enhanced.

Growing community of inventors

Gyeonggi-do, South Korea

Sung-Mu Son