Abstract: Disclosed is a display device connection method for rapidly delivering data to a plurality of display devices. A peer-to-peer (P2P) overlay network including the plurality of display devices as member peers is configured to distribute content. In this case, an overlay management server (OMS) connects first member peers through a network as a tree topology using a source peer providing the content as a root node, and transmits fragments of the content to a child peer based on a number of peers to which each of the member peers is capable of transmitting the fragments of the content for a preset period of time, and the source peer directly transmits the fragments of the content to a second member peer that is not included in the tree topology among the member peers based on a predetermined limit on a hop count.

Abstract: Disclosed herein are an in-network caching apparatus and method. The in-network caching method using the in-network caching apparatus includes receiving content from a second node in response to a request from a first node; checking a Conditional Leave Copy Everywhere (CLCE) replication condition depending on a number of requests for the content; checking a priority condition based on a result value of a priority function for the content; checking a partition depending on the number of requests for the content; performing a cache replacement operation for the content depending on a result of checking the partition for the content; and transmitting the content to the first node.

Abstract: Disclosed is a display device connection method for rapidly delivering data to a plurality of display devices. A peer-to-peer (P2P) overlay network including the plurality of display devices as member peers is configured to distribute content. In this case, an overlay management server (OMS) connects first member peers through a network as a tree topology using a source peer providing the content as a root node, and transmits fragments of the content to a child peer based on a number of peers to which each of the member peers is capable of transmitting the fragments of the content for a preset period of time, and the source peer directly transmits the fragments of the content to a second member peer that is not included in the tree topology among the member peers based on a predetermined limit on a hop count.

Abstract: Disclosed herein are an in-network caching apparatus and method. The in-network caching method using the in-network caching apparatus includes receiving content from a second node in response to a request from a first node; checking a Conditional Leave Copy Everywhere (CLCE) replication condition depending on a number of requests for the content; checking a priority condition based on a result value of a priority function for the content; checking a partition depending on the number of requests for the content; performing a cache replacement operation for the content depending on a result of checking the partition for the content; and transmitting the content to the first node.

Abstract: Provided is an operation method of a receiving entity, the method including setting a session with a sending entity based on bootstrap information; transmitting a signaling message corresponding to a media delivery request to the sending entity through the session; receiving media data from the sending entity through the session; and transmitting a signaling message corresponding to a media delivery control request to the sending entity through the session while receiving the media data.

Abstract: Provided a proof of play (PoP) method of a digital signage terminal and a digital signage server, the PoP method of the digital signage terminal including obtaining a digital signature and a PoP message generation policy provided by a content owner, generating log data comprising information on a play of at least one piece of content, based on the PoP message generation policy, generating a PoP message using information on the digital signature based on the generated log data, and providing the PoP message to at least one of the digital signage server and the content owner.

Abstract: A digital signage system and a method of providing information using the digital signage system are disclosed. The digital signage terminal includes an emergency detection unit, an emergency detection message generation unit, a communication unit, and an emergency alert message processing unit. The emergency detection unit collects the surrounding emergency-related information of the digital signage terminal. The emergency detection message generation unit generates an emergency detection message including the collected emergency-related information. The communication unit transmits the generated emergency detection message to a digital signage server, and receives an emergency alert message including an emergency alert corresponding to an emergency situation from the digital signage server. The emergency alert message processing unit parses the emergency alert message, and provides the emergency alert included in the emergency alert message to a user.

Abstract: Disclosed herein are a method of adaptively delivering media based on reception status information from a media client and an apparatus using the same. A media transmission method by a media transmission apparatus may include sending a message, including configuration information for media requested by a terminal, to the terminal, sending a media packet forming the media to the terminal, selecting a media packet having a transport characteristic corresponding to reception quality information for the media packet received from the terminal based on the reception quality information, and sending the selected media packet to the terminal.

Abstract: Disclosed herein are a method and apparatus for time-assisted authentication. A main authentication entity may generate a group of communication entities. In keying protocol a key distributor, i-e main authentication entity, controls the key generation arguments and time factor; other member of the group independently generate the time-based keys using the key generation arguments. Respective keys in the chain of keys may be valid for time intervals predefined for respective keys. A ticket is issued to the valid customer node during initial authentication process, which is further used for re-authentication of customer node with other service providing entities and customer to customer node mutual authentication. A ticket verifier may authenticate a customer node by decrypting the ticket using time based keys.

Abstract: Disclosed herein are a method and apparatus for processing MMTP packets. When an MMTP packet is transmitted, the packet processing apparatus calculates a reference value from partial field values of a reference MMTP packet header, and inserts the calculated reference value into the compressed header. By the reference value, MMTP packets may be correctly distinguished and may be correctly referred to when there are two reference MMTP packets in which the lower 5 bits of packet sequence numbers are identical to each other, or even when the number of reference MMTP packets is a multiple of 256.

Abstract: A peer-to-peer network system provides at least one peer with information for configuration of a peer-to-peer network to optimize the configuration of the peer-to-peer network by using at least one of information about a status of the at least one peer, information about a status of an underlying network and information about a user in respect of services.

Abstract: The present invention relates to an apparatus for processing an MPEG Media Transport (MMT) signaling message. As the apparatus for processing an MMT signaling message according to an embodiment, an MMT receiving device includes a context information measurement unit for measuring network context information to be reported to an MMT sending device. A Reception Quality Feedback (RQF) message generation unit sets a valid field indication value and a measured value for the network context information in an RQF message. An RQF message sending unit transmits the RQF message to the MMT sending device.

Abstract: Provided are method and apparatus for transmitting session-related parameters required for controlling session maintenance to a multicast agent in a relayed multicast network. The session manager in the relayed multicast network generates control data containing at least one of a T_PPROBE field, an N_PPROBE field, a T_HB field, a N_HB field, a T_HSOLICIT field, an N_HSOLICIT field, a T_HANNOUNCE field, a N_HANNOUNCE field, a T_RELAY field, an N_RELAY field, and a T_LEAVE field, and transmits the generated control data to the multicast agent. Accordingly, relayed multicast service can be provided for each session by setting session-related parameters for each session in a relayed multicast network and transmitting them to a multicast agent.

Abstract: Disclosed herein are a method and apparatus for processing MMTP packets. When an MMTP packet is transmitted, the packet processing apparatus calculates a reference value from partial field values of a reference MMTP packet header, and inserts the calculated reference value into the compressed header. By the reference value, MMTP packets may be correctly distinguished and may be correctly referred to when there are two reference MMTP packets in which the lower 5 bits of packet sequence numbers are identical to each other, or even when the number of reference MMTP packets is a multiple of 256.

Abstract: The present invention relates to an apparatus for processing an MPEG Media Transport (MMT) signaling message. As the apparatus for processing an MMT signaling message according to an embodiment, an MMT receiving device includes a context information measurement unit for measuring network context information to be reported to an MMT sending device. A Reception Quality Feedback (RQF) message generation unit sets a valid field indication value and a measured value for the network context information in an RQF message. An RQF message sending unit transmits the RQF message to the MMT sending device.

Abstract: A method and digital signage terminal for processing an interactive service using a digital signage system are disclosed. The digital signage terminal includes a device controller, a configuration manager, a device event receiver, an event data analyzer, and a registered event dispatcher. The device controller performs control so that the auxiliary device receives at least one event. The configuration manager receives a client configuration message, and extracts first event request information. The device event receiver receives raw data related to a first event. The event data analyzer converts the raw data into information related to the first event. The registered event dispatcher registers a second event based on the extracted first event request information, receives the information related to the first event, determines whether the first event corresponds to the registered second event, and generates determination information indicating that the first event corresponds to the second event.

Abstract: A method of providing timing information for synchronizing packet streams delivered from a first server and a second server, respectively, that are different from each other under hybrid delivery service environment is provided. The first server delivers a first media object and the second server delivers a second media object. The timing information for synchronizing a second packet including the second media object and a first packet including the first media object is generated in the second server. The timing information and the second packet including the second media object are provided from the second server to the client.

Abstract: An apparatus and method for controlling access to websites using a history of access of an administrator are disclosed. The apparatus includes a privilege checking unit, an access control release unit, and an access control unit. The privilege checking unit determines whether the access privileges of a user are administrator privileges when the user attempts to access a website. The access control release unit sets the website to an access-allowed state if the access privileges of the user are administrator privileges. The access control unit controls access to the website if the access privileges of the user are not administrator privileges, nor is the website in an access-allowed state.

Abstract: A digital signage system and a method of providing information using the digital signage system are disclosed. The digital signage terminal includes an emergency detection unit, an emergency detection message generation unit, a communication unit, and an emergency alert message processing unit. The emergency detection unit collects the surrounding emergency-related information of the digital signage terminal. The emergency detection message generation unit generates an emergency detection message including the collected emergency-related information. The communication unit transmits the generated emergency detection message to a digital signage server, and receives an emergency alert message including an emergency alert corresponding to an emergency situation from the digital signage server. The emergency alert message processing unit parses the emergency alert message, and provides the emergency alert included in the emergency alert message to a user.

Abstract: Disclosed herein are a method of adaptively delivering media based on reception status information from a media client and an apparatus using the same. A media transmission method by a media transmission apparatus may include sending a message, including configuration information for media requested by a terminal, to the terminal, sending a media packet forming the media to the terminal, selecting a media packet having a transport characteristic corresponding to reception quality information for the media packet received from the terminal based on the reception quality information, and sending the selected media packet to the terminal.