57 results about "Multimedia broadcast single frequency network" patented technology

The invention discloses methods for sending and receiving a demodulated reference signal (DM-RS) and devices for sending and receiving the DM-RS. The method for sending the DM-RS comprises the following steps of: from all physical resource blocks (PRB) which are included in a multimedia broadcast single frequency network (MBSFN) sub-frame to be sent to a user terminal, determining the PRB which is allocated to the user terminal; from resource elements (RE), which are included in the PRB, except the REs which carry a physical downlink control channel (PDCCH) and a common reference signal (CRS), determining the RE which carries the DM-RS; mapping the DM-RS into the determined RE; and sending the MBSFN sub-frame to the user terminal. The invention provides specific technical schemes that a base station sends the DM-RS in the MBSFN sub-frame and the user terminal receives the DM-RS in the MBSFN sub-frame.

Provided are a method for transmitting, by a base station in a wireless communication system, a vehicle to everything (V2X) message, and an apparatus for supporting the same. The base station may receive broadcast area information indicative of areas to which the V2X message will be broadcast, from a multi-cell coordination entity (MCE), receive the V2X message from a terminal, and transmit the received V2X message to a neighboring base station. Provided are a method for transmitting, by a V2X server in a wireless communication system, a vehicle to everything (V2X) message, and an apparatus for supporting the same. The V2X server may receive the V2X message transmitted by a base station from a serving/packet-gateway (S/P-GW), determine a broadcast of the received V2X message, and transmit the V2X message to a base station that belongs to the same multimedia broadcast single frequency network (MBSFN) area as the base station.

The invention provides methods and devices for enhancing the continuity of an MBMS through improvement of an X2 interface. Among the methods, a method for providing MBMS information to at least one second base station in a first base station includes the steps of obtaining dispatching information for the MBMS of the first base station, and obtaining an MBMS identification transmitted by the first base station and a multimedia broadcast single frequency network area identification which transmits the MBMS, wherein the at least one base station is adjacent to the first base station, the dispatching information of the MBMS indicates the first base station to dispatch MBMS transmission on at least one multimedia broadcast single frequency network sub-frame; and providing the MBMS information of the first base station for the at least one second base station according to obtained dispatching information of the MBMS. The MBMS information of the first base station includes information related to the dispatching information of the MBMS, and the multimedia broadcast single frequency network area identification and the MBMS identification.

The embodiment of the invention relates to an identification sending method, an identification acquiring method, an evolution base station, a terminal and a communication system. The identification sending method comprises the steps of: acquiring area identification of a multimedia broadcast single frequency network (MBSFN) and sending correlative information of the area identification to the terminal. The identification acquiring method comprises the steps of acquiring the correlative information of the area identification of the MBSFN, and acquiring the area identifications of the MBSFN according to the correlative information of the area mark. The embodiment of the invention ensures that user equipment (UE) can acquire the area identification through sending the correlative informationof the area identification, and pilot frequency can be decoded so that channel estimation can be performed.

The embodiment of the invention provides a method for querying a receiving state of multimedia broadcast multicast service (MBMS). The method comprises the following steps that: network-side equipment sends the query request information of the receiving state of the MBMS; and based on the signaling interaction of a non-access stratum (NAS) or based on service source interaction, the network-side equipment receives the information of the receiving state of the MBMS. The embodiment of the invention also provides network equipment. By adoption of the scheme provided by the invention, the receiving state of user equipment (UE) on the MBMS can be informed to a network side on the basis of no revising of a radio access network (RAN) side protocol, so that air interface multimedia broadcast single frequency network (MBSFN) resources can be more effectively utilized. Moreover, by adoption of the scheme provided by the invention, the conventional system is less changed, the compatibility of the system cannot be influenced, and simplicity in implementation and high efficiency are realized.

The invention discloses a method for guaranteeing eMBMS continuity. The method comprises that switching request confirmation is returned to a source evolved node B (eNodeB) from a target eNodeB, and the source eNodeB sends configuration information which relates to a current eMBMS session of user equipment to the target eNodeB; the target eNodeB determines whether the eMBMS session is supported or not currently, and if the eMBMS session is not supported, an indicating message is sent to a multiple custom edge (MCE); the MCE determines the eMBMS session to be restored or reactivated according to the indicating message and sends a session scheduling message or a session starting message to the target eNodeB; and the target eNodeB deploys services of the eMBMS session in a corresponding multimedia broadcast single frequency network (MBSFN) area and returns a response message. The invention also discloses a system. By the aid of the method and the system, the eMBMS continuity after switching is finished can be guaranteed, and current network systems are compatible.

A method for dynamically adjusting a multimedia broadcasting single frequency network area relates to the technical field of communication. The method can divide a cell into a single frequency network center cell alpha with MBMS users, a single frequency network edge area beta with the MBMS users and a single frequency network edge cell gamma without the MBMS users according to whether MBMS user distribution exists. The method comprises the steps of sequentially comparing the MBMS user number of the single frequency network edge area with the MBMS users in the cell and sequentially checking the contribution degree of a cell without the MBMS users at the edge on the whole single frequency network. If the MBMS user number is larger than the threshold value, a single frequency network transmission mode of the cell is opened, or the target cell is classified as a cell set without the MBMS users. The MBMS users in the cell can be selectively borne through PTP or MBSFN to provide MBMS service. By means of user distribution and contribution degree, the method can reasonably and dynamically adjust an MBSFN area, prevents unnecessary cell resources from being kept and meanwhile improves wireless spectrum efficiency.

The invention relates to a method and device for transmitting and receiving a downlink signal and/or a downlink channel. The method for transmitting a downlink signal and/or a downlink channel comprises the step that a base station sends a downlink signal or a downlink channel to user equipment (UE) on a pre-configured unicast subframe, and/or a unicast portion in a multimedia broadcast single frequency network (MBSFN) subframe, and/or an MBSFN subframe comprising a unicast portion, and/or an MBSFN subframe comprising a newly defined downlink signal, wherein the pre-configured unicast subframe, and/or the MBSFN subframe comprising a unicast portion and/or the MBSFN subframe comprising a newly defined downlink signal comprise/comprises any one or more subframes.

The invention discloses a device and a method for sending unicast services. The method includes: an MBSFN (multimedia broadcast single-frequency network) reserved cell determines cell reference signal transmitting power for the MBSFN reserved cell according to cell reference signal transmitting power of cells adjacent to the MBSFN reserved cell; the MBSFN reserved cell determines traffic channel transmitting power for the MBSFN reserved cell according to the determined cell reference signal transmitting power of the MBSFN reserved cell; and the MBSFN reserved cell sends unicast services on MBSFN subframes according to the determined traffic channel transmitting power and the cell reference signal transmitting power of the MBSFN reserved cell. Using the device and the method for sending unicast services can solve the problem of waste of matchable MBSFN subframes caused by the fact that MBMS (multimedia broadcast multicast service) is not transmitted on the MBSFN subframes in the MBSFN reserved cell.

The invention discloses a method for realizing multimedia broadcasting and multicasting service transmission channel bearing, which comprises the following steps of: according to the difference among data quantities borne by multimedia broadcasting and multicasting service transmission channels (MTCH), respectively allocating at least two continuous multimedia broadcasting single-frequency network (MBSFN) subframes to each MTCH for use to realize the data bearing of the MTCH, or allocating one MBSFN subframe to each MTCH for use to realize the data bearing of the MTCH. The invention also discloses a system for realizing multimedia broadcasting and multicasting service transmission channel bearing. In the system, a bearing unit is used for adopting the at least two allocated MBSFN subframes to realize the data bearing of the MTCH, or is used for adopting the one allocated MBSFN subframe to realize the data bearing of the MTCH. By using the method and the system, the specific bearing of the relevant MTCH can be realized.

The purpose of the invention is to provide a method and device for realizing frequency resource sharing in an EMBMS (Enhanced Multimedia Broadcast Multicast Service). The method particularly comprises the steps of: obtaining mapping relationships between one or more MBSFN (Multimedia Broadcast Single Frequency Network) sub-frames allocated in a wireless frame of a current MBMS (Multimedia Broadcast Multicast Service) service and a multicast channel; calculating a communication volume of each multicast channel within a multicast channel scheduling period based on a mapping relationship; obtaining frequency resource configuration information practically needed by the last MBSFN sub-frame in each multicast channel; and sending the frequency resource configuration information to UE (User Equipment). Compared with the prior art, the method and device for realizing frequency resource sharing in the EMBMS avoid waste of the frequency resource as frequency resource sharing between different MCH (Multicast Channels) is realized through configuring the frequency resource practically needed by the last MBSFN sub-frame in the one or multiple MBSFN sub-frames allocated in the wireless frame of the MBMS service. Furthermore, the method and device for realizing frequency resource sharing in the EMBMS also can add the number of the MCH supported by 3GPP (Third Generation Partnership Project based on occupation information of PRB (Physic Resource Blocks) of the same MBSFN sub-frame of the wireless frame occupied by different MCH, and provide help for a network operator and a content provider to increase the network volume of the MCH and improve transmission performance of the real-time service.

The embodiment of the invention discloses a time domain resource allocation method and a device, and relates to the technical field of communication. The transmission performance of data transmissioncan be ensured by allocating reasonable default candidate resources. The method comprises the following steps: determining N pieces of candidate time domain resource information, wherein N is greaterthan or equal to 2; and receiving indication information, wherein the indication information is used for determining time domain resources allocated to the data channel from the N pieces of candidatetime domain resource information. Wherein for at least one frame structure parameter in the M frame structure parameters, M is a natural number; wherein the time domain resource indicated by at leastone piece of candidate time domain resource information in the N pieces of candidate time domain resource information is different from the time domain resource used by at least one of the following signals and/or channels in the LTE: a cell common reference signal CRS, a physical downlink control channel PDCCH, a multimedia broadcast single frequency network MBSFN, a main synchronization signal PSS, an auxiliary synchronization signal SSS and/or a broadcast channel PBCH.

The invention discloses a method for configuring multimedia broadcast multicast service (MBMS) synchronization, which comprises the following steps of: a network side device receives a synchronization control frame from a broadcast multicast service center (BM-SC), wherein the synchronization control frame carries the load conditions of data frames in the synchronizing sequence; the network side device determines the composition information of a radio link control (RLC) protocol data unit (PDU) according to the load conditions of the data frames in the synchronizing sequence; and when the data frames are lost, the network side device determines that the transmission of the data frames needs to be stopped according to the composition information of the RLC PDU. By using the invention, the out-of-step base station in the multimedia broadcast single frequency network (MBSFN) region can regain synchronization when continuously losing the synchronous data frames without influencing the transmission of subsequent MBMS services, thereby effectively enhancing the experience of the users receiving MBMS services in the MBSFN region.

The invention discloses an anti-fading mobile signal framing modulation method for a multimedia broadcast single frequency network, and relates to a mixed framing modulation scheme of the space domain, the time domain and the frequency domain. According to the training sequence optimization design, the signal generating scheme and the signal selecting method of the anti-fading mobile signal framing modulation method for the multimedia broadcast single frequency network, OFDM signals can be processed and recovered at a receiver end easily to obtain original signals of the OFDM signals. The anti-fading mobile signal framing modulation method for the multimedia broadcast single frequency network has the advantages of being low in peak-to-average power ratio, short in synchronization time, resistant to channel fading, multiple in controllable service and the like.

Aspects are disclosed for operating a relay via an MBSFN-based backhaul link. Control resources are allocated, which include a first set of control resources and a second set of control resources. For some embodiments, a portion of the first set of control resources is concatenated with a portion of the second set of control resources to form a concatenation of resources whereas, in other embodiments, an indication scheme is implemented to provide an indication of a first or second allocation size respectively associated with the first and second set of control resources. At least one control signal is then transmitted which includes at least one of the concatenation or the indication. Other disclosed embodiments are directed towards configuring a user equipment to decode a control signal generated according to the aspects disclosed herein.