2656 results about "Multimedia broadcasting" patented technology

A method for controlling a UE (User Equipment) to retransmit an RRC (Radio Resource Control) connection request message in a mobile communication system capable of providing an MBMS (Multimedia Broadcast/Multicast Service). The method includes the steps of determining, by an RRC layer of the UE, if a control message including a timer value corresponding to a cell having the UE is received from a RNC (Radio Access Controller); transmitting the RRC connection request message to the BSC over an uplink common channel when the control message is equal to an MBMS control message; and repeatedly transmitting the RRC connection request message in response to the timer value until receiving a response message from the BSC.

An apparatus and method of transmiting/receiving a multimedia broadcats/multicats service (MBMS) is disclosed. The present invention enables ARQ and HARQ to be aplied to the MBMS transmision, thereby enabling more efficient data transmision at a greater rate.

Methods, tools, and a multicast connectivity architecture are provided for provisioning bundled high bandwidth multi-channel multimedia broadcast services over a packet switched communications network. Multicast group membership join/prune requests generated by the destination network nodes are processed on edge. Multicast tree connectivity in the core of the communications network is static and centrally provisioned based on multicast group member edge network nodes associated with subscribers, while dynamic multicasting techniques are employed over the distribution portion of the service provider's communications network to deliver requested content to each destination network node. The methods and tools compute multicast trees, configure on-tree branching network nodes, and establish Virtual Private LAN network overlays for channel bundles to convey multi-channel content in the core of the managed communications network between edge network nodes. Centralized multicast tree provisioning enables the use of efficient multicast tree topologies, while VPLS packet transport provides interoperability between disparate Layer-2 packet transport technologies employed in different portions of the communications network.

Disclosed is a mobile communication system for providing a number of User Equipment (UEs) positioned in a plurality of cells with Multimedia Broadcast/Multicast Service (MBMS) using CDMA technology. A Radio Network Controller (RNC) transmits a MBMS availability message to each of the plurality of cells under management regarding at least one MBMS which is available in a corresponding cell in order to support the mobility of the UE which receives the MBMS. The UE decides whether it can receive a desired MBMS in the current cell, after receiving the MBMS availability message, and requests the desired MBMS or reselects another cell. The continuity of MBMS reception is improved while UEs using the MBMS are moving and the overhead of RRC connection setup for unnecessary MBMS request is reduced.

The invention provides a synchronous processing method based on new CMMB (China Mobile Multimedia Broadcasting) synchronous signals. The CMMB synchronous signals comprise first training sequences and second training sequences; the first training sequences comprise CAZAC (Constant Amplitude Zero Auto Correlation) sequences, and the second training sequences comprise PN (Pseudo-Noise) sequences; in the synchronous processing method, the CAZAC sequences are utilized to achieve coarse symbol timing offset estimation and decimal frequency offset coarse estimation; the PN sequences are utilized to achieve the estimation of strongest path time delay in multipath, and the multipath is taken as coarse symbol timing positioning; the CAZAC sequences and the PN sequences are utilized to achieve the integer frequency offset estimation; the fast Fourier transform (FFT) is performed on the PN sequences to achieve the channel response estimation so as to estimate a first path time delay and achieve the fine symbol timing position estimation; and a maximum likelihood (ML) criterion is utilized to process the PN sequences in the second training sequences to obtain the decimal frequency offset fine estimation. The synchronous processing method can effectively improve the synchronous accuracy and can achieve better synchronization performance in the mobile communication environment with low signal-to-noise ratio.

An apparatus and method for receiving a multimedia broadcasting service in a mobile communication system including a satellite digital multimedia broadcasting (DMB) reception system and a terrestrial DMB reception system. In the apparatus, a satellite DMB modem block demodulates a satellite broadcast signal received from the satellite DMB system. A terrestrial DMB modem block, sharing at least one function block with the satellite DMB modem block, demodulates a terrestrial broadcast signal received from the terrestrial DMB system. A Motion Picture Experts Group (MPEG) decoder separately decodes MPEG transport streams (TSs) for the satellite broadcast signal and the terrestrial broadcast signal.

The present invention provides a system for capture and instantaneous on-demand delivery of multimedia content over a communication network to a plurality of users. Incorporated into the system is a variety of advantageous features including dynamically mapped resource locator server with central control mechanism for the administration of communication channels, users access and activity, cross-platform peer-to-peer delivery-on-demand client and user programmable content capturing component. In the preferred embodiment, the multimedia information being delivered is high quality video and audio with the purpose of multi-user multimedia broadcasting and remote video monitoring over a packet switched network, such as the Internet. However, the multimedia information can also include images, text, keystrokes, user commands, computer files, data, or any other type of information that can be transmitted over any communication network.

A method of allocating resource elements in an orthogonal frequency division multiplexing (OFDM) system for transmission of a channel state information reference signal (CSI-RS) is disclosed. The method includes converting resource elements to a two-dimensional frequency-time domain. The converted resource elements can then be partitioned to units of a physical resource block (PRB), which can be one subframe, for example. It can be determined whether a portion of a PRB is being used by another signal; and if the portion of the PRB is not being used, it can be allocated for transmission of the CSI-RS. The CSI-RS can be transmitted at resource element locations determined by the resource elements available to the CSI-RS in a regular or a frequency-division duplexing (FDD) downlink subframe, for example. The CSI-RS can be transmitted in a downlink subframe configured as a Multi-Media Broadcast over a Single Frequency Network (MBSFN) or a non-MBSFN subframe.

A Multimedia Broadcast/Multicast Service (MBMS) server in a packet data communication system generates and assigns Temporary Mobile Group Identities (TMGIs) to MBMS services, thereby serving as a central repository for the TMGIs. In response to receiving a request to participate in an MBMS service, the MBMS server generates a TMGI. The MBMS server assigns the TMGI to the MBMS service and stores the TMGI in association with information relating to the MBMS service to produce a stored TMGI. The MBMS server further conveys the TMGI to a source of the received request, thereby providing for a distribution of the TMGI to mobile stations subscribed to the MBMS service. The subscribed mobile stations may then use the TMGI to receive data packets associated with the MBMS service.

A communication system conveys Multimedia Broadcast Multicast Service (MBMS) data to multiple mobile stations (MSs) subscribing to an MBMS service while minimizing possible congestion over an Iub interface. A network controller receives at least one MBMS data packet comprising an MBMS payload. In response to receiving the at least one data packet, the network controller establishes communication channels to the multiple MSs for conveyance of MBMS data and conveys to a downstream network element, via an Iub interface, a single copy of the payload. The downstream network element replicates the received payload to produce a copy of the payload for each established communication channel. The downstream network element then assembles, in association with each established communication channel, a set of one or more data packets for conveyance via the established communication channel, wherein each set of data packets includes a copy of the payload.

A method, apparatus and system are provided for controlling base stations for multimedia broadcast communications. In one embodiment, an apparatus includes a reporting subsystem configured to compile an activity status report based on a counting report and a channel quality indicator report received from user equipment and to send the activity status report to an entity of the communication system. The apparatus also includes a dynamic single-frequency network subsystem configured to control a multimedia broadcast and multimedia multicast service provided by the apparatus as a function of a static contribution table associated therewith and the activity status report.

Provided are a base station, a mobile station, and a method for providing service continuity between Multimedia Broadcast and Multicast Service (MBMS) areas. A system information generation unit of the base station may generate a System Information Block (SIB) including broadcasting area information providing a broadcasting service to a neighboring cell of a serving cell where the mobile station is located. A communication unit may transmit the generated SIB to the mobile station.

In a RTP stream having a plurality of FEC frames containing source blocks of media packets, random access points are inserted in front of the source blocks so as to allow a media decoder to decode the media packets as soon as FEC decoding is finished. In particular, the media packets contain forward error correction (FEC) source blocks for a multimedia broadcast/multicast-based streaming service content. As the multimedia broadcast/multicast streaming service includes dynamic interactive multimedia scene content where the source RTP packets of different media along with the FEC RTP packets are transmitted as separate RTP streams, the inclusion of the random access point facilitates immediate rendering of the dynamic interactive multimedia scene content after FEC decoding, thus reducing the tune-in latency.

The invention discloses a realization method and a system for sending and receiving a state report by a UE (User Equipment) in an MBMS (Multimedia Broadcast Multicast Service). The realization method comprises the following steps of: actively initiating a feedback process by the UE or sending a feedback request indication to the UE by a network side within a certain period or at the occurrence of a trigger event; sending feedback information to the network side by the UE according to such indication; and counting a UE receiving state by the network side according to the feedback information of the UE. The invention also discloses a system for sending the MBMS and receiving the state report by the UE. In the invention, the UE can send and receive the state report under the condition of a plurality of MCCHs (Multiple Control Channel), the correct statistics on the number of the UE is realized, and requirements on activating or deactivating MBSFN (Multimedia Broadcast System Frame Number) transmission by the network side are satisfied.

The invention discloses a channel transmission method for multimedia broadcast multi-broadcast service. The channel transmission method comprises the steps that a network side sends broadcast information which indicates MCCH configuration to a terminal; the terminal monitors corresponding MCCH according to the received configuration information; the network side adds dispatching information to the configuration information on the MCCH and sends the configuration information to the terminal; and the terminal determines corresponding MTCH according to the configuration information and receives data. The invention also discloses a system, the network side and the terminal of the MBMS, wherein, the dispatching information comprises the transmission identification of the MBMS, the starting line and the ending line of the transmission and the transmission period. By utilizing the invention, the signal channel resources can be saved when the service of TV programs, etc. are transmitted, redundant signaling processes can be avoided, furthermore, a user access period can be shortened and user experience is improved.

A system for providing resilient multimedia broadcasting services over a VPLS network is described. A network Management System (NMS) calculates disjoint minimum cost trees using the Steiner algorithm executed with extra steps to result in the disjoint trees. Destination PE routers in the VPLS network are connected to the disjoint trees so that they can be serviced by either tree in the case of a fault. Each of the disjoint trees is provisioned with enough bandwidth to carry all of the services provided by the VPLS network. Under normal operation, however, the services are distributed evenly over the trees. In the event of a fault, the services on the faulty tree are switched to the other tree using split horizon bridging. Each Steiner tree can also be realized using poin-to-multipoint LSPs which is fully protected by a precomputed point-to-mulltipoint LSP.

Discontinuous transmission and reception of point-to-multipoint service data between a network and a mobile terminal is achieved by transmitting scheduling information from the network to the mobile terminal via a first common channel. The mobile terminal determines a time for receiving the service data in response to the scheduling information and discontinuously receives the service data through a second common channel.

The system comprises three parts: adapter in single frequency network, GPS receiver, and modulator of supporting ground digital TV broadcasting in single frequency network. At central transmitting terminal, the adapter inserts MIP packets in transmission code stream. MIP packet carries synchronizing time label relevant to GPS receiver and system maximal time delay to each relay station etc. In each relay station, synchronization system detects M1P packets, reading out time label and maximal time delay, measuring time delay of received signal, calculating out additional time delay. According to the additional time delay, TS flow is delayed properly in order to make signal synchronization again among relay stations. The disclosed scheme is realized through FPGA, and is applied to ground digital multiple media broadcasting transmission system forwaded by Tsinghua Univ. Favorable effect is obtained through actual try.