摘要:
PROBLEM TO BE SOLVED: To provide a DVR with the ability to receive multimedia content via a network connection, and a method to efficiently broadcast multimedia content to multiple DVRs across the network without overloading a content server.SOLUTION: A content server creates a schedule of transmission times for data streams and assigns the streams to multicast groups. DVRs receive the schedule that contains content descriptions for each data stream along with the transmission times of each particular content description from the content server. The content server transmits the content across the Internet according to the published schedule. Each DVR joins the associated multicast group. The DVR receives the multicast stream for the group and stores the stream on its local storage device.
摘要:
A point-to-multipoint communication system that is well operative for transmitting megabytes of information in the form of a signal burst. Each slave unit temporarily stores a signal and measures the amount of the signal information before transmitting the signal. A master unit requests that slave units report the measured amounts of information, and they give reports to the master unit. On the basis of the reports from the slave units, the master unit determines an allowable amount of information for each slave unit and permits the slave units to transmit the stored signals according to the request from the master unit. The interval between the reports from the slave units to the master unit can be varied.
摘要:
An IP broadcast transmitting device comprises means for acquiring and collecting channel tuning information and program-related information from broadcast signals of each broadcasting station from which the broadcast signals are distributed, means for updating and managing the information, means for distributing the information independently from IP multicast-distributions of the broadcast signals, and means for distributing a service area tuning list with IP multicast-distribution information of the broadcast signals and distribution positions of the channel tuning information and the program-related information of the broadcast signals described therein.
摘要:
PROBLEM TO BE SOLVED: To provide a method and a device for transmitting a group communication signal that reduce a resource amount needed to support a multicast application by enhancing resource use efficiency.SOLUTION: The present invention relates to the method and device 700 for group communication, and a plurality of group communication signaling modes are supported. In a first mode 706, a copy of packets is sent to respective group members in a sector or cell individually. In a second mode 712, the copy of packets is addressed to a plurality of group members at the same time. Transition between the two modes can be determined as a function of cost 708 in operation in each mode in view of system cost and/or the number 704 of group members in the service-provided cell or sector.
摘要:
PROBLEM TO BE SOLVED: To provide a method of providing a broadcast system parameter message in a wireless communication system supporting a broadcast service. SOLUTION: The message identifies a service option number corresponding to a set of broadcast parameters. The message identifies a block of bytes corresponding to the broadcast parameters. The message is transmitted on a channel for transmitting overhead information. For a system supporting the broadcast service, the message distinguishes a protocol stack for processing the broadcast service from a protocol stack for processing broadcast contents. COPYRIGHT: (C)2011,JPO&INPIT
摘要:
A network device includes a first interface that receives multicast packets and a control module that determines that N of the multicast packets have a common multicast address. The network device also includes a packet aggregation module that uses the N of the multicast packets to form aggregate data. The network device also includes a packet format module that adds a header to the aggregate data to form a unicast packet. The network device also includes a second interface that transmits the unicast packet. N is an integer greater than or equal to 1.
摘要:
A point-to-multipoint communication system that is well operative for transmitting megabytes of information in the form of a signal burst. Each slave unit temporarily stores a signal and measures the amount of the signal information before transmitting the signal. A master unit requests that slave units report the measured amounts of information, and they give reports to the master unit. On the basis of the reports from the slave units, the master unit determines an allowable amount of information for each slave unit and permits the slave units to transmit the stored signals according to the request from the master unit. The interval between the reports from the slave units to the master unit can be varied.