986 results about "Multimedia Broadcast Multicast Service" patented technology

A method for selecting a cell by a user equipment (UE) to receive a Multimedia Broadcast/Multicast Service (MBMS) service in a mobile communication system which supports the MBMS service with different frequency allocations (FAs) in the same area. In the method, a radio network controller (RNC) transmits information on an MBMS cell to the UE, and the MBMS cell information includes an MBMS offset for guaranteeing priority for cell reselection to the MBMS cell. The UE performs cell reselection using the MBMS cell information and receives the MBMS service from the reselected cell.

A control message transmitting/receiving method in an MBMS-supporting mobile communication system. In the present invention, an RNC periodically transmits control messages related to MBMS RB setup to UEs. Thus, although a UE initially fails to receive an intended MBMS service, it can set up an MBMS RB by receiving a related retransmitted control message. Also, the RNC periodically provides information about ongoing MBMS services on a cell basis so that a UE can decide whether its requested MBMS service is in progress and request information required to set up an MBMS RB for the MBMS service to the RNC by individual signaling.

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.

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.

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.

A method and an apparatus for receiving data in a User Equipment (UE) supporting a Multimedia Broadcast Multicast Service (MBMS) are provided. A method of receiving data by a UE which supports an MBMS includes obtaining first indication information indicating a Multicast/Broadcast over a Single Frequency Network (MBSFN) subframe reserved for an MBSFN, obtaining second indication information indicating a subframe in the MBSFN subframe, the subframe decoding a Physical Multicast CHannel (PMCH), and when although a first subframe is indicated as the MBSFN subframe, the first subframe is not indicated to decode a PMCH and is not of a subframe for a Positioning Reference Signal (PRS), receiving a Physical Downlink Control CHannel (PDCCH) of the first subframe and decoding a corresponding Physical Downlink Shared CHannel (PDSCH).

The method concerns multicast service delivering through the UMTS and GSM networks. For this aim is given higher priority to an opportune subset of all the real-time services with guaranteed bandwidth transmissible by the network. This subset is named IS-MBMS (Immediate Streaming-Multimedia Broadcast Multicast Service). A certain amount of physical resources is reserved in all the system for the IS-MBMS services; not real-time services can be transmitted on the reserved resources when not used by the IS-MBMS ones. The reserved resources allow for transmitting the IS-MBMS services with minimum bit-rate, at least. The network announces in the service area that an IS-MBMS content becomes available; in reply one or more subscribed users transmit a request for joining a multicast group for that service. The network transmits a notification message on a multicast channel to give to the joined users useful information of how get the announced service, i.e.: Service-Id, RB parameters, etc. The IS-MBMS content is transmitted immediately on a point-to-multipoint channel set-up in each involved cells, even if there are zero recipients in the cell. Content is transmitted in parallel in different cells, leading to service continuity, and the mobile station can perform soft combining. During the IS-MBMS content delivery the network can count in each involved cell the number of subscribed users joined to the transmitted IS-MBMS service. The network switches from point-to-multipoint to point-to-point or to no transmission depending on the result of counting and on a fixed threshold. Alternatively the network, parallel to the content delivery, can execute a checking procedure to see if there are joined users in a cell: in this case the point-to-multipoint channel is switched to no transmission (fig. 3).

A method to control a multimedia broadcast multicast service (MBMS) mode of a MBMS session in a communication system is provided herein. In operation, a first network element that is located outside a radio access network determines to use one of a single frequency network MBMS mode and a single cell MBMS mode for the MBMS session based on a property of the MBMS session. The first network element then transmits a session control signaling message to a second network element that is located inside the radio access network. The session control signaling message instructs the second network element that user plane data for the MBMS session shall be transmitted using the determined MBMS mode. The base stations then transmit the user plane data to one or user equipments in a target service area according to the determined MBMS mode.

A method of handling mobility in multimedia broadcast multicast service single frequency network (MBSFN) for a user equipment of a wireless communication system includes when the user equipment proceeds with an MBMS service and performs handover from a source cell to a target cell, checking whether a target MBSFN area which the target cell belongs to is the same as a source MBSFN area which the source cell belongs to, when the target MBSFN area is different from the source MBSFN area, receiving a multicast control channel (MCCH) corresponding to the target MBSFN area, checking whether the MBMS service is provided in the target MBSFN area, and when the MBMS service is provided in the target MBSFN area, sending a service join request to a target network of the wireless communication system, for continuing to receive the MBMS service.

A method for performing a handover in a mobile communications system of a Multimedia Broadcast/Multicast Service (MBMS), wherein when a terminal having subscribed (joined) a point-to-multipoint service moves from a first base station to a second base station, the terminal is commanded (indicated) by the first base station to transfer point-to-multipoint service information, and then transfers to the second base station a point-to-multipoint service list subscribed (joined) by the terminal or information on the point-to-multipoint service received from the first base station, whereby a service delay which may occur during the handover can be effectively avoided.

Disclosed a method for efficiently performing a frequency shift when a User Equipment (UE) intends to receive at least one service through at least one preferred frequency in a system for providing a Multimedia Broadcast/Multicast Service (MBMS) service. The method comprises the steps of inserting information for a preferred frequency of a service into a message and transmitting the message to the UE, the service being indicated by the message, the message reporting a start of the service which the UE has joined, receiving a response message including request information representing the indicated service or at least one different service, which has been selected by the UE, and determining if the UE is to perform hard handover to the preferred frequency according to the request information.

Methods, systems, and devices are described for evolved multimedia broadcast multicast service (eMBMS) utilizing enhanced component carriers (eCCs). A wireless system may send unicast data using resources allocated for multicast transmissions (e.g., eMBMS transmissions). The presence of unicast data in a transmission time interval (TTI) scheduled for multicast transmission may be indicated by a control region within the TTI. A UE may monitor the control region to identify the presence of unicast information. A TTI scheduled for multicast transmission may also include reference signals to aid in the demodulation of multicast or unicast data. In some cases, the reference signals may be front-loaded at the beginning or embedded within the TTI. The embedded reference signals may be configured based on the type of data carried by the TTI scheduled for multicast transmission, or by length of the cyclic prefix used by the TTI scheduled for multicast transmission.

The present invention discloses a method for implementing Multimedia Broadcast Multicast Service (MBMS), wherein multiple service modes are set for the MBMS and each service mode is corresponding to a path, a user equipment (UE) activates at least one service mode supported by the current network and receives the MBMS data in the corresponding path of the activated service mode from the network side. This method guarantees that UE covered by networks of multiple types can safely receive the subscribed MBMS data. When the current network covering UE fails to support the activated service mode, the UE will activate a service mode that the current network supports such that the UE can receive the MBMS data in this service mode. Therefore, it is ensured that UE can receive the subscribed MBMS data in any network environments, thus satisfying subscribers' demands to a larger extent.

A radio network control node acts across an Iur interface as a drift radio network control node (262) for a user equipment unit (UE) in a communications system supporting a multimedia broadcast multicast service (MBMS). The drift radio network control node (262) maintains a first counter for counting a number of events occurring at the drift radio network control node (262). Registration of the drift radio network control node (262) with a core network node (30) is advantageously delayed until the counter has exceeded a first threshold value. In one example mode, the number of events occurring at the drift network control node (262) which is counted by the counter is a number of user equipment units for which a Iur linking procedure is performed for the MBMS session. In another example mode, the number of events occurring at the drift network control node (262) which is counted by the counter are time periods elapsed since an Iur linking procedure for the MEMS session has been performed for a predetermined user equipment unit.