WO2019084764A1 - Procédés, appareils et support de stockage lisible pour multidiffusion de vidéo - Google Patents

Procédés, appareils et support de stockage lisible pour multidiffusion de vidéo Download PDF

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Publication number
WO2019084764A1
WO2019084764A1 PCT/CN2017/108557 CN2017108557W WO2019084764A1 WO 2019084764 A1 WO2019084764 A1 WO 2019084764A1 CN 2017108557 W CN2017108557 W CN 2017108557W WO 2019084764 A1 WO2019084764 A1 WO 2019084764A1
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WIPO (PCT)
Prior art keywords
ues
cluster
clusters
multicast
status information
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PCT/CN2017/108557
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English (en)
Inventor
Shuqi CHAI
Kin Nang Lau
An Liu
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Huizhou Tcl Mobile Communication Co., Ltd
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Priority to PCT/CN2017/108557 priority Critical patent/WO2019084764A1/fr
Priority to CN201780096952.XA priority patent/CN111512636A/zh
Publication of WO2019084764A1 publication Critical patent/WO2019084764A1/fr

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/60—Network structure or processes for video distribution between server and client or between remote clients; Control signalling between clients, server and network components; Transmission of management data between server and client, e.g. sending from server to client commands for recording incoming content stream; Communication details between server and client 
    • H04N21/63—Control signaling related to video distribution between client, server and network components; Network processes for video distribution between server and clients or between remote clients, e.g. transmitting basic layer and enhancement layers over different transmission paths, setting up a peer-to-peer communication via Internet between remote STB's; Communication protocols; Addressing
    • H04N21/64—Addressing
    • H04N21/6405—Multicasting
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/21—Server components or server architectures
    • H04N21/222—Secondary servers, e.g. proxy server, cable television Head-end
    • H04N21/2225—Local VOD servers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/23—Processing of content or additional data; Elementary server operations; Server middleware
    • H04N21/24—Monitoring of processes or resources, e.g. monitoring of server load, available bandwidth, upstream requests
    • H04N21/2402—Monitoring of the downstream path of the transmission network, e.g. bandwidth available
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04N—PICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N21/00—Selective content distribution, e.g. interactive television or video on demand [VOD]
    • H04N21/20—Servers specifically adapted for the distribution of content, e.g. VOD servers; Operations thereof
    • H04N21/25—Management operations performed by the server for facilitating the content distribution or administrating data related to end-users or client devices, e.g. end-user or client device authentication, learning user preferences for recommending movies
    • H04N21/258—Client or end-user data management, e.g. managing client capabilities, user preferences or demographics, processing of multiple end-users preferences to derive collaborative data
    • H04N21/25808—Management of client data
    • H04N21/25841—Management of client data involving the geographical location of the client

Definitions

  • Embodiments of the present disclosure generally relate to communications, and more particularly relate to methods, apparatuses and readable storage medium for video multicasting.
  • eMBMS evolved Multimedia Broadcast Multicast Service
  • the formation of a multicast group is based on service contents, i.e., UEs requesting same video service form a multicast group.
  • the actual transmission rate of the video data in each multicast group is limited by the transmission rate supported by the worst-case one of the UEs in the multicast group, e.g., equal to the transmission rate supported by the worst-case one of the UEs in the multicast group.
  • the worst-case UE refers to the UE with the worst wireless environment, and correspondingly, the transmission rate supported by the worst-case UE is the lowest.
  • the actual transmission rate is obviously smaller than the transmission rate supported by these UEs, leading to the waste of the capability of these UEs and thus affecting the overall system throughput and experience quality.
  • embodiments of the present disclosure provide methods, apparatuses and readable storage medium for video multicasting, aiming at addressing the issues of decreasing in the overall system throughput and experience quality caused by the formation of multicast group based on service contents.
  • a method for video multicasting comprising: obtaining, by a cluster control server, information of one or more multicast groups, each of the one or more multicast groups comprising at least two user equipments (UEs) , and all the UEs in a same multicast group requesting a same video multicast service; receiving, by the cluster control server, channel statistics and mobility status information of the UEs; classifying, by the cluster control server, the UEs in each of the one or more multicast groups into at least two clusters according to the channel statistics and the mobility status information, the channel statistics and the mobility status information of all the UEs in a same cluster being within a same range; and transmitting, by the cluster control server, the clustering result to other multicast network elements (NEs) so that each of the clusters corresponds to a transmission channel used to transmit video data through multicasting.
  • NEs multicast network elements
  • a method for video multicasting comprising: receiving, by a DANE, a clustering result from a cluster control server, the clustering result being obtained by the cluster control server through classifying UEs in a same multicast group into at least two clusters according to channel statistics and mobility status information of the UEs, each multicast group comprising at least two UEs, all the UEs in the same multicast group requesting a same video multicast service, and the channel statistics and the mobility status information of all the UEs in the same cluster being within a same range; calculating, by the DANE, a recommended transmission rate for each of the clusters, the recommended transmission rate of each of the clusters being positively correlated with the channel statistics and the mobility status information of the worst-case one of the UEs in each of the clusters; and transmitting the recommended transmission rate of the cluster to which one of the UEs belongs to the UE and transmitting the recommended transmission rates of all the clusters to a MCE by the DANE so that the MCE
  • a method for video multicasting comprising: receiving a clustering result and receiving from a DANE recommended transmission rates of all clusters by a MCE, the clustering result being obtained by the cluster control server through classifying UEs in a same multicast group into at least two clusters according to channel statistics and mobility status information of the UEs, each multicast group comprising at least two UEs, and all the UEs in a same multicast group requesting a same video multicast service, the channel statistics and the mobility status information of all the UEs in the same cluster being within a same range, the recommended transmission rates being calculated by the DANE for each of the clusters, and the recommended transmission rate of each of the clusters being positively correlated with the channel statistics and the mobility status information of the worst-case one of the UEs in the cluster; allocating, by the MCE, radio resources for each of the clusters respectively, an amount of the radio resources allocated for each of the clusters being positively correlated with the recommended transmission rate of the cluster; transmitting, by
  • a method for video multicasting comprising: obtaining, by a Content Server, a clustering result, the clustering result being obtained by a cluster control server through classifying UEs in a same multicast group into at least two clusters according to channel statistics and mobility status information of the UEs, each multicast group comprising at least two UEs, all the UEs in a same multicast group requesting a same video multicast service, and the channel statistics and the mobility status information of all the UEs in a same cluster being within a same range; and transmitting, by the Content Server, video data to each of the clusters via a transmission channel corresponding to the cluster through multicasting.
  • a method for video multicasting comprising: requesting, by a UE, a video multicasting service; obtaining, by the UE, an ID of a multicast group to which the UE belongs and an ID of a cluster to which the UE belongs in the multicast group, the video multicasting service requested by the UE being the same as that requested by all other UEs in the multicast group, and channel statistics and mobility status information of the UE being within the same range as those of all other UEs in the cluster; and receiving, by the UE, video data transmitted by a Content Server via a transmission channel corresponding to the cluster to which the UE belongs through multicasting.
  • a method for video multicasting comprising: receiving, by a base station, a radio resource configuration and information of one or more related clusters of the base station from a MCE, the radio resource configuration comprising information of radio resources allocated for the one or more related clusters of the base station, the one or more related clusters of the base station being the clusters to which UEs connected to the base station belong, the clusters being obtained by a cluster control server through classifying UEs in a same multicast group according to channel statistics and mobility status information of the UEs, each multicast group comprising at least two UEs, all the UEs in a same multicast group requesting a same video multicast service, and the channel statistics and the mobility status information of all the UEs in the same cluster being within a same range; and creating, by the base station, one or more corresponding transmission channels for the one or more related clusters of the base station according to the radio resource configuration, the transmission channel being used to transmit video data through multicasting, and an amount of radio resources
  • an apparatus for video multicasting comprising a processor and a communication circuit coupled to the processor.
  • the processor can be configured to execute instructions to implement any one of the above-mentioned methods.
  • the instructions can implement any one of the above-mentioned method while executed.
  • the present disclosure may have the advantages that a multicast group formed based on service contents is further classified into at least two clusters according to channel statistics and mobility status information of UEs in the multicast group, and each of the clusters respectively corresponds to a transmission channel used to transmits video data through multicasting, realizing respective transmission of video data for different clusters in the same multicast group.
  • the transmission rate of the video data in each of the clusters is not limited by other clusters because the channel statistics and the mobility status information of all the UEs in each cluster are within a same range. That is, the transmission rates of the video data in different clusters may be different, thereby reducing the waste of the capability of the UEs with better wireless environment and improving the overall system throughput and experience quality.
  • FIG. 1 is a flowchart illustrating a first embodiment of a method for video multicasting according to the disclosure.
  • FIG. 2 is a flowchart illustrating a second embodiment of the method for video multicasting according to the disclosure.
  • FIG. 3 is a flowchart illustrating a third embodiment of the method for video multicasting according to the disclosure.
  • FIG. 4 is a flowchart illustrating a fourth embodiment of the method for video multicasting according to the disclosure.
  • FIG. 5 is a flowchart illustrating a fifth embodiment of the method for video multicasting according to the disclosure.
  • FIG. 6 is a flowchart illustrating a sixth embodiment of the method for video multicasting according to the disclosure.
  • FIG. 7 is a flowchart illustrating a seventh embodiment of the method for video multicasting according to the disclosure.
  • FIG. 8 is a flowchart illustrating an eighth embodiment of the method for video multicasting according to the disclosure.
  • FIG. 9 is a flowchart illustrating a ninth embodiment of the method for video multicasting according to the disclosure.
  • FIG. 10 is a flowchart illustrating a tenth embodiment of the method for video multicasting according to the disclosure.
  • FIG. 11 is a flowchart illustrating an eleventh embodiment of the method for video multicasting according to the disclosure.
  • FIG. 12 is a flowchart illustrating a twelfth embodiment of the method for video multicasting according to the disclosure.
  • FIG. 13 is a flowchart illustrating a thirteenth embodiment of the method for video multicasting according to the disclosure.
  • FIG. 14 is a flowchart illustrating a fourteenth embodiment of the method for video multicasting according to the disclosure.
  • FIG. 15 is a flowchart illustrating a fifteenth embodiment of the method for video multicasting according to the disclosure.
  • FIG. 16 is a flowchart illustrating a sixteenth embodiment of the method for video multicasting according to the disclosure.
  • FIG. 17 is a flowchart illustrating a seventeenth embodiment of the method for video multicasting according to the disclosure.
  • FIG. 18 is a flowchart illustrating an eighteenth embodiment of the method for video multicasting according to the disclosure.
  • FIG. 19 is a flowchart illustrating a nineteenth embodiment of the method for video multicasting according to the disclosure.
  • FIG. 20 is a schematic view illustrating the architecture of a video multicast system applying the method for video multicasting in an embodiment of the disclosure
  • FIG. 21 is a flowchart illustrating a working process of the video multicast system shown in FIG. 20 within one cycle
  • FIG. 22 is a schematic diagram illustrating the simulation result of classifying a multicast group into two clusters for the video multicast system shown in FIG. 20.
  • FIG. 23 is a schematic diagram illustrating the simulation result of classifying a multicast group into three clusters for the video multicast system shown in FIG. 20.
  • FIG. 24 is a block diagram illustrating a first embodiment of an apparatus for video multicasting according to the disclosure.
  • FIG. 25 is a block diagram illustrating a second embodiment of an apparatus for video multicasting according to the disclosure.
  • FIG. 26 is a block diagram illustrating a third embodiment of an apparatus for video multicasting according to the disclosure.
  • FIG. 27 is a block diagram illustrating a fourth embodiment of an apparatus for video multicasting according to the disclosure.
  • FIG. 28 is a block diagram illustrating a fifth embodiment of an apparatus for video multicasting according to the disclosure.
  • FIG. 29 is a block diagram illustrating a sixth embodiment of an apparatus for video multicasting according to the disclosure.
  • FIG. 30 is a block diagram illustrating a first embodiment of a readable storage medium according to the disclosure.
  • modules/units/circuits/components include structure (e.g., circuitry) that performs those task or tasks during operation.
  • the modules/units/circuits/components can be said to be configured to perform the task even when the specified module/unit/circuit/component is not currently operational (e.g., is not on) .
  • the modules/units/circuits/components used with the “configured to” language include hardware-for example, circuits, memory storing program instructions executable to implement the operation, etc.
  • module/unit/circuit/component is “configured to” perform one or more tasks is expressly intended not to invoke 35 U.S.C. ⁇ 112 (f) , for that module/unit/circuit/component.
  • “configured to” can include a generic structure (e.g., generic circuitry) that is manipulated by software and/or firmware (e.g., an FPGA or a general-purpose processor executing software) to operate in a manner that is capable of performing the task (s) at issue.
  • Configured to may also include adapting a manufacturing process (e.g., a semiconductor fabrication facility) to fabricate devices (e.g., integrated circuits) that are adapted to implement or perform one or more tasks.
  • the term “based on” describes one or more factors that affect a determination. This term does not foreclose additional factors that may affect the determination. That is, a determination may be solely based on those factors or based, at least in part, on those factors.
  • a determination may be solely based on those factors or based, at least in part, on those factors.
  • a first embodiment of a method for video multicasting according to the present disclosure may comprise the following blocks.
  • a cluster control server can obtain information of one or more multicast groups.
  • the present method can be implemented on the cluster control server.
  • the cluster control server can belong to multicast network elements (NEs) , mainly play a role of clustering, and may be implemented by software and/or hardware.
  • NEs multicast network elements
  • Each of the multicast groups can comprise at least two user equipments (UEs) , and all the UEs in a same multicast group request a same video multicast service.
  • the information of one or more multicast groups may generally include IDs of all the multicast groups and IDs of all UEs in each of the multicast groups.
  • the cluster control server may obtain the information of one or more multicast groups from a Broadcast Multicast Service Center (BM-SC) responsible for the authentication and grouping of the UEs.
  • BM-SC Broadcast Multicast Service Center
  • the cluster control server can receive channel statistics and mobility status information of the UEs.
  • the cluster control server may receive the channel statistics and mobility status information of the UEs from the UEs directly via the base station, or receive the channel statistics and mobility status information of the UEs forwarded by other multicast NEs (e.g., a Dynamic Adaptive Streaming over HTTP (DASH) -aware network element (DANE) ) .
  • the channel statistics can reflect the wireless environment where the UEs are located, and the transmission rates supported by the UEs can be estimated more correctly by combining the channel statistics with the mobility status information.
  • the channel statistics may not refer to the currently measured channel status of a UE, but refer to the statistics of the channel statuses that are obtained by measuring the UE for multiple times within a relatively long period.
  • the channel status may be represented by at least one of indices such as a Signal-to-noise ratio (SNR) , a Signal to Interference plus Noise Ratio (SINR) , a Reference Signal Receiving Power (RSRP) or a Reference Signal Receiving Quality (RSRQ) etc.
  • the statistics may include at least one of mean and variance/standard deviation.
  • the mobility status information may include the motion state of the UE (e.g., the direction of the movement, the speed of the movement etc. ) , or may be used to infer information about the motion state of the UE, e.g., cell handover/reselect records, positioning records or the like.
  • the cluster control server can classify the UEs in each of the one or more multicast group into at least two clusters according to the channel statistics and the mobility status information.
  • the channel statistics and the mobility status information of all the UEs in a same cluster are within a same range.
  • the channel statistics and/or the mobility status information of UEs in different clusters are within different ranges.
  • the cluster control server can transmit the clustering result to other multicast network elements (NEs) so that each of the clusters respectively corresponds to a transmission channel used to transmit video data through multicasting.
  • NEs multicast network elements
  • the clustering result may comprise IDs of all the clusters in all the multicast groups and IDs of UEs in each of the clusters.
  • Other multicast NEs may comprise at least one of a DANE, a Multi-cell/multicast Coordination Entity (MCE) , a BM-SC and a Content Server.
  • the cluster control server may be integrated with at least one of the other multicast NEs. Additionally, the cluster control server may also transmit the clustering result to the base station.
  • a part or all of the other multicast NEs can cooperate to map each of the clusters to one independent transmission channel that is used to transmit video data through multicasting.
  • the transmission channels of different clusters in a same multicast group can be independent, the video data transmitted by the transmission channels can be independent.
  • the quality of the video watched by the UEs of different clusters in the same multicast group may be different while the contents of the video are the same.
  • the transmission rate of the video data in each of the clusters may be fixed or adjustable.
  • an amount of radio resources occupied by each of the transmission channels may be positively correlated with the channel statistics and the mobility status information of the worst-case one of the UEs in the cluster corresponding to the transmission channel, thereby achieving dynamic self-adaptive adjustment of the transmission channels.
  • the cluster control server may need to repeat the blocks in the present embodiment for multiple times in application.
  • the blocks may be repeated periodically or aperiodically, e.g., the repetition of the blocks may be event-triggered.
  • the blocks may be repeated each time after the Media Presentation Description (MPD) is transmitted to the UE by the Content Server and the BM-SC creates/updates the multicast group (s) .
  • MPD Media Presentation Description
  • the transmission cycle of the MPD is a long time unit relative to the Transmission Time Interval (TTI) , overheads introduced by updating the clustering result can be reduced.
  • the triggering event may include that UEs joining /leaving the multicast group (s) and/or a change in the channel statistics or the mobility status information of the UEs in the multicast group (s) exceeds a threshold.
  • the multicast group formed based on service contents is further classified into at least two clusters according to the channel statistics and the mobility status information of UEs in the multicast group, and each of the clusters respectively corresponds to a transmission channel used to transmit video data through multicasting, realizing respective transmission of video data for different clusters in the same multicast group.
  • the transmission rate of the video data in each of the clusters is not limited by other clusters because the channel statistics and the mobility status information of all the UEs in each cluster are within a same range. That is, the transmission rates of the video data of different clusters may be different, thereby reducing the waste of the capability of the UEs with better wireless environment and improving the overall system throughput and experience quality.
  • a multicast group comprises four stationary UEs A, B, C and D, wherein the transmission rate supported by the UE A is 100 kbps, the transmission rate supported by the UE B is 150 kbps, the transmission rate supported by the UE C is 400 kbps, the transmission rate supported by the UE D is 450 kbps, and those transmission rates supported by the UEs are estimated according to the channel statistics of the UEs.
  • a video content server transmits exactly the same video data simultaneously to the four UEs, and in order to ensure the successful transmission of the video data, the transmission rate of the video data is only 100 kbps. This is quite unfair for the UEs C and D, and seriously affects the experience quality.
  • the multicast group may be divided into a cluster 1 and a cluster 2 by adopting the method provided by the present embodiment.
  • the cluster 1 consists of the UEs A and B
  • the cluster 2 consists of UEs C and D
  • the transmission rate of the video data in the cluster 1 is still 100 kbps
  • the transmission rate of the video data in the cluster 2 may be 400 kbps, thereby improving the experience quality.
  • a second embodiment of the method for video multicasting according to the present disclosure is based on the first embodiment of the method for video multicasting according to the present disclosure and further comprises the following block.
  • the cluster control server may notify either directly or via the other multicast NEs, those of the UEs of which the mobility status information is greater than a preset threshold to discard the video multicast service and switch to a unicast service.
  • the mobility status information greater than a preset threshold may mean that the movement speed of the UE is greater than the preset threshold or the UE reciprocates at boundaries of neighboring cells.
  • the rate of change in the wireless environment of the UE with a high mobility is relatively fast, and frequent cell handover may even be involved, which makes the UE unsuitable for multicast data transmission. Therefore, the UE of a high mobility may be notified to switch to a unicast service, i.e., a point-to-point service between the UE and the Content Server.
  • a third embodiment of the method for video multicasting according to the present disclosure is based on the first embodiment of the method for video multicasting according to the present disclosure and further comprises the following block.
  • the cluster control server may transmit the clustering result to the UEs either directly or via the other multicast NEs.
  • the clustering result may comprise the IDs of all the clusters in all the multicast groups and the IDs of the UEs in each cluster, which may cause unnecessary signaling overhead.
  • the clustering result may only comprise the ID of a cluster to which a target UE belongs and the IDs of all the UEs in this cluster.
  • the clustering result may only comprise the ID of the target UE and the ID of the cluster to which the target UE belongs.
  • a fourth embodiment of the method for video multicasting according to the present disclosure may comprise the following blocks.
  • a DANE may receive a clustering result from a cluster control server.
  • the present method can be implemented on the DANE belonging to multicast NEs.
  • the DANE mainly plays a role of dynamically adjusting the transmission channels, and may be implemented by software and/or hardware.
  • the DANE may be integrated with at least one of the cluster control server, the MCE, the BM-SC and the Content Server.
  • the clustering result may be obtained by the cluster control server through classifying UEs in a same multicast group into at least two clusters according to channel statistics and mobility status information of the UEs, each multicast group may comprise at least two UEs, all the UEs in a same multicast group may request a same video multicast service, and the channel statistics and the mobility status information of all the UEs in the same cluster may be within a same range.
  • the DANE may calculate a recommended transmission rate for each of the clusters.
  • the recommended transmission rate of each of the clusters can be positively correlated with the channel statistics and the mobility status information of the worst-case one of the UEs in the cluster.
  • the DANE can estimate the transmission rate supported by each of the UEs according to the channel statistics and the mobility status information of the UE.
  • the worst-case one of the UEs refers to the UE having the worst channel statistics and mobility status information in the cluster, and correspondingly, the transmission rate supported by the worst-case UE is the lowest.
  • the recommended transmission rate of each of the clusters is smaller than or equal to the transmission rate supported by the worst-case one of the UEs in the cluster.
  • the DANE may receive the channel statistics and the mobility status information of the worst-case UE either directly or indirectly (via other multicast NEs) .
  • the DANE may transmit the recommended transmission rate of the cluster to which one of the UEs belongs to the UE and transmit the recommended transmission rates of all the clusters to the a MCE so that the MCE may control at least a base station to create a corresponding transmission channel for each of the clusters according to the recommended transmission rate.
  • the MCE may need to perform overall control.
  • the MCE can be used to handle allocation of radio resources and transmission parameters across cells/base stations.
  • the transmission channel is used to transmit the video data through multicasting.
  • An amount of radio resources occupied by each of the transmission channels can satisfy requirements for transmitting the video data with the recommended transmission rate of the cluster that corresponds to the transmission channel.
  • the amount of radio resources occupied by each of the transmission channels may be positively correlated with the recommended transmission rate of the cluster that corresponds to the transmission channel.
  • the amount of radio resources occupied by each of the transmission channels can exactly satisfy requirements for transmitting the video data with the recommended transmission rate of the cluster that corresponds to the transmission channel, thereby achieving dynamic self-adaptive adjustment of the transmission channels and improving the utilization ratio of the radio resources.
  • the recommended transmission rate may be directly taken as the actual transmission rate of the video data, or the actual transmission rate may be determined with reference to the recommended transmission rate, in which case the actual transmission rate can be smaller than or equal to the recommended transmission rate.
  • the DANE may need to repeat the blocks in the present embodiment for multiple times in application.
  • the blocks may be repeated periodically or aperiodically, e.g., the repetition of the steps may be event-triggered.
  • the cluster control server creates/updates the clustering result periodically or aperiodically, the DANE can determine whether to calculate and transmit the recommended transmission rate periodically or aperiodically independently.
  • the execution cycle of the block S21 may be the same as or different from those of subsequent blocks. If the cluster control server also operates periodically, the operation cycle of the cluster control server is generally greater than or equal to that of the DANE.
  • the triggering event may include that the clustering result changes and/or a change in the channel statistics and/or the mobility status information of the worst-case one of the UEs in at least one cluster exceeds a threshold.
  • a fifth embodiment of the method for video multicasting according to the present disclosure is based on the fourth embodiment of the method for video multicasting according to the present disclosure and further comprises the following blocks before the block S21.
  • the DANE may receive the channel statistics and the mobility status information from the UEs.
  • the channel statistics and the mobility status information may be carried by a Server and Network Assisted DASH (SAND) Status message.
  • SAND Status message is sent from the UE to DANE.
  • the UE can inform the DANE about requested quality, anticipated DASH segments, acceptable alternative content which can lead to the intelligent real-time media processing at the content server.
  • the UE’s channel statistic and mobility state information can be merged into the SAND Status message together with other network assistance information.
  • the DANE may transmit the channel statistics and the mobility status information to the cluster control server.
  • the DANE can play a role of forwarding data between the cluster control server and the UEs.
  • the DANE may need to repeat the blocks in the present embodiment for multiple times in application.
  • the blocks may be repeated periodically or aperiodically.
  • the execution cycles of the steps S24 and S25 may be the same as or different from each other.
  • a sixth embodiment of the method for video multicasting according to the present disclosure is based on the fourth embodiment of the method for video multicasting according to the present disclosure and further comprises the following block after the block S21.
  • the DANE may transmit to each of the UEs an ID of the cluster to which the UE belongs.
  • the DANE may also transmit the ID of the UE to the UE for verification. Additionally, the DANE may also transmit the complete clustering result to the UEs.
  • the ID and the recommended transmission rate of the cluster to which the UE belongs may be carried by an SAND Parameters Enhancing Reception (PER) message.
  • SAND PER message is sent from DANE to the UE.
  • DANE will support the UE with video segment representation recommendation, network throughput which can lead to the intelligent UE adaptation behavior.
  • the ID of the cluster to which the UE belongs can be merged into the SAND PER message together with other network assistance recommendation information.
  • both the ID and the recommended transmission rate of the cluster to which the UE belongs are carried by the SAND PER message.
  • the ID and the recommended transmission rate can also be transmitted respectively.
  • a seventh embodiment of the method for video multicasting according to the present disclosure is based on the fourth embodiment of the method for video multicasting according to the present disclosure and further comprises the following block after the block S21.
  • the DANE may transmit the clustering result to a Content Server and/or the MCE.
  • an eighth embodiment of the method for video multicasting according to the present disclosure is based on the fourth embodiment of the method for video multicasting according to the present disclosure and further comprises the following block after the block S21.
  • the DANE may notify the worst-case one of the UEs in each of the clusters to select a service bitrate.
  • the worst-case UE may be mobile, the wireless environment at the time when the channel statistics and the mobility status information are reported may possibly be different from the wireless environment at the time of actual transmission of the video data. Moreover, the Content Server may not support the recommended transmission rate. Therefore, the worst-case one of the UEs may select a service bitrate with reference to the recommended transmission rate, and the selected service bitrate can be used as the actual transmission rate of the video data.
  • a ninth embodiment of the method for video multicasting according to the present disclosure may comprise the following blocks.
  • a MCE may receive a clustering result and receive from a DANE recommended transmission rates of all clusters.
  • the present method can be implemented on the MCE belonging to the multicast NEs.
  • the MCE mainly plays a role of overall allocation of radio resources and transmission parameters, and may be implemented by software and/or hardware.
  • the MCE may be integrated with at least one of the cluster control server, the DANE, the BM-SC and the Content Server.
  • the MCE may receive the clustering result from the cluster control server either directly or indirectly (via other multicast NEs, e.g., the DANE) .
  • the clustering result can be obtained by the cluster control server through classifying UEs in a same multicast group into at least two clusters according to channel statistics and mobility status information of the UEs, each multicast group can comprise at least two UEs, all the UEs in a same multicast group can request a same video multicast service, the channel statistics and the mobility status information of all the UEs in the same cluster can be within a same range, the recommended transmission rates can be calculated by the DANE for each of the clusters, and the recommended transmission rate of each of the clusters can be positively correlated with the channel statistics and the mobility status information of the worst-case one of the UEs in the cluster.
  • the MCE may allocate radio resources for each of the clusters respectively.
  • the radio resources refer to radio time-frequency resources. Since the UEs in the same cluster may connect to different base stations, and the UEs connected to the same base station may belong to different clusters, the MCE may need to overall control the allocation of the radio resources by taking situations of all the clusters in all the multicast groups into consideration. An amount of the radio resources allocated for each of the clusters can satisfy the requirements for transmitting the video data with the recommended transmission rate of the cluster. The amount of the radio resources allocated for each of the clusters may be positively correlated with the recommended transmission rate of the cluster.
  • the radio resources allocated for different clusters in the same multicast group may be multiplexed in time-division and/or frequency-division, e.g., different clusters are mapped to different portions of system bandwidth in frequency domain.
  • the MCE may transmit a radio resource configuration to at least a base station so that the base station (s) creates one or more corresponding transmission channels for one or more related clusters of the base station according to the radio resource configuration.
  • the base station in the present disclosure refers to a base station being involved, i.e., a base station connected to the UE belonging to the cluster.
  • the radio resource configuration comprises the information of the radio resources allocated for the one or more related clusters of the base station, and the one or more related clusters of the base station are the clusters into which the UEs connected to the base station are classified.
  • the MCE may transmit the complete result of radio resource allocation to the base station, which may possibly result in additional signaling overhead.
  • the transmission channel can be used to transmit video data through multicasting.
  • the transmission channel corresponding to each cluster is created according to the radio resources allocated for the cluster. That is, an amount of the radio resources occupied by each of the transmission channels is equal to the amount of the radio resources allocated for the cluster corresponding to the transmission channel, so the amount of radio resources occupied by each of the transmission channels is positively correlated with the recommended transmission rate of the cluster that corresponds to the transmission channel.
  • the MCE may need to repeat the blocks in the present embodiment for multiple times in application.
  • the blocks may be repeated periodically or aperiodically, e.g., the repetition of the steps may be event-triggered. If the clustering result and the recommended transmission rates of all the clusters received by the MCE are the same as those received the last time, the MCE may select to directly transmit the radio resource configuration of the last time to the base station without allocating the radio resources and/or do not transmit the radio resource configuration to the base station to reduce the signaling overhead.
  • a tenth embodiment of the method for video multicasting according to the present disclosure is based on the ninth embodiment of the method for video multicasting according to the present disclosure and further comprises the following block.
  • the MCE may transmit information of the one or more related clusters of the base station to the base station.
  • the MCE may also transmit the complete clustering result to the base station, which may result in additional signaling overhead.
  • an eleventh embodiment of the method for video multicasting according to the present disclosure is based on the ninth embodiment of the method for video multicasting according to the present disclosure and further comprises the following block.
  • the MCE may transmit the clustering result to a Content Server.
  • a twelfth embodiment of the method for multicasting according to the present disclosure may comprise the following blocks.
  • a Content Server may obtain a clustering result.
  • the present method can be implemented on the Content Server belonging to the multicast NEs.
  • the Content Server mainly plays a role of providing video stream data, and may be implemented by software and/or hardware.
  • the Content Server may obtain the clustering result from the clustering control server either directly or indirectly (e.g., through other multicast NEs such as the MCE) .
  • the Content Server may be integrated with at least one of the cluster control server, the DANE, the MCE and the BM-SC.
  • the clustering result can be obtained by a cluster control server through classifying UEs in a same multicast group into at least two clusters according to channel statistics and mobility status information of the UEs, each multicast group can comprise at least two UEs, all the UEs in a same multicast group can request a same video multicast service, and the channel statistics and the mobility status information of all the UEs in a same cluster can be within a same range.
  • the Content Server may transmit video data to each of the clusters via a transmission channel corresponding to the cluster through multicasting.
  • the actual transmission rate of the video data of each of the clusters may be smaller than or equal to the transmission rate supported by the transmission channel corresponding to the cluster. Since the transmission channels of different clusters in the same multicast group are independent, the video data transmitted by the transmission channels may also be independent. Thus, the quality of the video watched by the UEs of different clusters in the same multicast group may be different while the contents of the video are the same.
  • the transmission rate of the video data of each cluster may be fixed or adjustable. If the Content Server supports the DASH function to dynamically adjust the transmission rate of the video data, then the Content Server may also be referred to as a DASH Server.
  • an amount of radio resources occupied by each of the transmission channels can be positively correlated with the channel statistics and the mobility status information of the worst-case one of the UEs in the cluster corresponding to the transmission channel, thereby achieving dynamic self-adaptive adjustment of the transmission channels.
  • different transmission rates may correspond to different encoding rates, and different encoding rates correspond to different video qualities with the same compression algorithm.
  • Data packets of the video streams of the same contents at different encoding rates may be completely different from each other.
  • the Content Server may need to repeat the blocks in the present embodiment multiple times in application.
  • a thirteenth embodiment of the method for video multicasting according to the present disclosure is based on the twelfth embodiment of the method for video multicasting according to the present disclosure and in which the S41 comprises the following blocks.
  • the Content Server may transmit a MPD to the UEs periodically.
  • the Content Server in the present embodiment can support the DASH function.
  • the Content Server may use several sessions to transmit the video stream, and each session transmits one fragment of the video stream.
  • the Content Server may first transmit the MPD to the UEs each time the session is initiated so as to periodically transmit the MPD to the UEs.
  • the MPD may include several candidate bitrates available for the current session, i.e., the transmission rates that can be used for current segment of the video stream to be transmitted.
  • the Content Server may receive the clustering result from other multicast NEs each time after the MPD is transmitted.
  • the other multicast NEs may comprise at least one of the cluster control server, the DANE, the MCE and the BM-SC.
  • the present block can also be executed periodically, and the execution cycle can be equal to the transmission cycle of the MPD.
  • a fourteenth embodiment of the method for video multicasting according to the present disclosure is based on the thirteenth embodiment of the method for video multicasting according to the present disclosure and further comprises the following block before block S42.
  • the Content Server may receive a service bitrate reported by the worst-case one of the UEs in each of the clusters.
  • the worst-case UE in each of the clusters may be mobile, the wireless environment at the time when the channel statistics and the mobility status information are reported may possibly be different from the wireless environment at the actual transmission time of the video data. Moreover, the recommended transmission rate supported by the transmission channel corresponding to each of the clusters may not be included in the MPD, i.e., may not be supported by the Content Server. Therefore, the worst-case UE in each of the clusters may select the service bitrate from the candidate bitrates provided by the MPD as the actual transmission rate of the video data of the cluster. Typically, the service bitrate can be smaller than or equal to the maximum transmission rate supported by the transmission channel corresponding to the cluster.
  • the present method can be implemented on a UE.
  • the UE may be stationary or mobile, including cellular phones, personal digital assistants (PDA) , wireless modems, tablet computers, notebook computers, cordless phones, etc. .
  • PDA personal digital assistants
  • the present method may comprise the following blocks.
  • a UE may request a video multicasting service.
  • the UE can join a multicast group after the request is accepted.
  • the UE may obtain an ID of a multicast group to which the UE belongs and an ID of a cluster to which the UE belongs in the multicast group.
  • the UE can obtain the IDs of the multicast group and the cluster to which the UE belongs from multicast NEs via the base station connected to the UE.
  • the UE can obtain the ID of the multicast group from the BM-SC and the ID of the cluster from the cluster control server directly (not via other multicast NEs) or indirectly (via other multicast NEs) via the base station connected to the UE.
  • the video multicasting service requested by the UE can be the same as that requested by all other UEs in the multicast group to which the UE belongs, and channel statistics and mobility status information of the UE can be within the same range as those of all other UEs in the cluster to which the UE belongs.
  • the UE may need to obtain the channel statistics and the mobility status information thereof and then transmits the obtained channel statistics and mobility status information to the cluster control server.
  • the UE receive video data transmitted by a Content Server via a transmission channel corresponding to the cluster to which the UE belongs through multicasting.
  • the multicast NEs (the cluster control server, the MCE etc. ) cooperate to control the base station connected to the UE to create corresponding transmission channel.
  • an amount of radio resources occupied by each of the transmission channels can be positively correlated with the channel statistics and the mobility status information of the worst-case one of the UEs in the cluster corresponding to the transmission channel, thereby achieving dynamic self-adaptive adjustment of the transmission channels.
  • a sixteenth embodiment of the method for video multicasting according to the present disclosure is based on the fifth embodiment of the method for video multicasting according to the present disclosure and in which the block S52 comprises the following blocks.
  • the UE can receive a MPD from the Content Server periodically.
  • the MPD may include several candidate bitrates available fro the current session, i.e., the transmission rates that can be used for current segment of the video stream to be transmitted.
  • the UE can transmit the channel statistics and the mobility state information to the cluster control server or a DANE each time after receiving the MPD.
  • the UE can receive the ID of the cluster from the cluster control server or the DANE.
  • the channel statistics and the mobility state information may be carried by an SAND Status message, and the ID of the cluster to which the UE belongs may be carried by an SAND PER message.
  • the UE can obtain the ID of the cluster to which the UE belongs periodically. Refer to relevant descriptions of aforesaid embodiments for more details.
  • a seventeenth embodiment of the method for video multicasting according to the present disclosure is based on the fifteenth embodiment of the method for video multicasting according to the present disclosure and further comprises the following blocks before the block S53.
  • the UE may obtain a recommended transmission rate of the cluster to which the UE belongs.
  • the recommended transmission rate of the cluster to which the UE belongs may be transmitted together with the ID of the cluster to which the UE belongs, and both the recommended transmission rate and the ID may be carried by the SAND PER message.
  • the UE may select a service bitrate from candidate bitrates included in the MPD.
  • the UE may select one of the candidate bitrates that is smaller than or equal to the recommended transmission rate with a difference there between closest to 0 as the service bitrate.
  • the UE may transmit the service bitrate to the Content Server.
  • the service bitrate can be used as transmission rate of the video data transmitted by the Content Server to the cluster to which the UE belongs.
  • the UE in the present embodiment can be the worst-case one of the UEs in the cluster to which the UE belongs. Refer to relevant descriptions of aforesaid embodiments for more details.
  • an eighteenth embodiment of the method for video multicasting according to the present disclosure is based on the fifteenth embodiment of the method for video multicasting according to the present disclosure and further comprises the following block after the block S51.
  • the UE may receive a notification of switching to a unicast service when the mobility status information thereof is greater than a preset threshold.
  • the mobility status information greater than a preset threshold may mean that the movement speed of the UE is greater than the preset threshold or the UE reciprocates at boundaries of neighboring cells.
  • the rate of change in the wireless environment of the UE with a high mobility is relatively fast, and frequent cell handover may even be involved, which makes the UE unsuitable for multicast data transmission. Therefore, the UE of a high mobility may be notified to switch to a unicast service. In this case, the block S52 and blocks after the blocks S52 will not be executed.
  • the present method can be implemented on a base station.
  • the base station can be connected to a core network and can perform wireless communication with UE to provide communication coverage for the corresponding geographical area.
  • the base station may be a macro base station, a micro base station, a pico base station, or a femtocell.
  • the base station may also be referred to as a radio base station, an access point, a node B, an evolved node B (eNodeB, eNB) , a gNB, or other suitable terminology.
  • the method is illustrated as being sequential. However, portions of the method may be performed in other orders or in parallel (e.g., simultaneously) .
  • the present method may comprise the following blocks.
  • a base station may receive a radio resource configuration and information of one or more related clusters of the base station from a MCE.
  • the radio resource configuration can comprise information of radio resources allocated for the related cluster (s) of the base station, the related cluster (s) of the base station are the cluster (s) to which UEs connected to the base station belong, the clusters can be obtained by a cluster control server through classifying UEs in a same multicast group according to channel statistics and mobility status information of the UEs, each multicast group comprises at least two UEs, all the UEs in a same multicast group can request a same video multicast service, and the channel statistics and the mobility status information of all the UEs in the same cluster can be within a same range.
  • the base station may create one or more corresponding transmission channels for the one or more related clusters of the base station according to the radio resource configuration.
  • the base station can dispatch radio resources allocated for each of the related cluster (s) in the radio resource configuration to the UEs in the related cluster (s) in resource scheduling to create corresponding transmission channel (s) , i.e., Multicast channel (MCH) (s) .
  • the transmission channel (s) are used to transmit video data through multicasting.
  • the base station can transmit the received video data of each of the related cluster (s) to the UEs in the related cluster (s) via corresponding transmission channel (s) through transparent transmission.
  • An amount of radio resources occupied by each of the transmission channels may be positively correlated with a recommended transmission rate of the cluster corresponding to the transmission channel.
  • the recommended transmission rate of each of the related clusters may be positively correlated with the channel statistics and the mobility status information of the worst-case one of the UEs in the related cluster.
  • a video multicast system applying the method for video multicasting comprises a UE 101, a base station 102, a BM-SC 103, a cluster control server 104, a DANE 105, a MCE 106 and a Content Server 107.
  • a UE 101 and one base station 102 are depicted in the figure, while the actual numbers of the UE and the base station may be greater than one.
  • the BM-SC 103, the cluster control server 104, the DANE 105, the MCE 106 and the Content Server 107 may be collectively called the multicast NEs.
  • the UE 101 connects to the base station 102, the base station further connects to the BM-SC 103, the DANE 105, the MCE 106 and the Content Server 107, the BM-SC 103 further connects to the cluster control server 104 and the Content Server 107, the cluster control server 104 further connects to the DANE 105 and the MCE 106, and the MCE 106 further connects to the Content Server 107.
  • the video multicast system operates periodically.
  • a specific working process of the video multicast system in one cycle comprises the following blocks.
  • An arrow passing the base station 102 means that the base station 102 performs transmission between the UE 101 and the multicast NEs through transparent transmission.
  • the Content Server 107 may transmit a MPD to the UE 101.
  • the BM-SC 103 may create/update the information of the multicast group (s) .
  • the transmission period of the MPD can be a long period relative to the TTI, while it is quite short relative to the time of the user controlling the UE to join /leave the multicast group (s) . Therefore, the creating/updating of the information of the multicast group (s) in the present embodiment can be performed periodically each time after the MPD is transmitted instead of in real time.
  • the BM-SC 103 may transmit the latest information of the multicast group (s) to the cluster control server 104 and the Content Server 107.
  • the order in which the block S103 and blocks S104 to S106 are executed are not limited as long as the block S103 is executed before block S107.
  • the UE 101 may obtain the channel statistics and the mobility status information thereof.
  • the UE 101 may transmit the channel statistics and the mobility status information thereof to the DANE 105.
  • the channel statistics and the mobility status information are carried by the SAND Status message.
  • the DANE 105 may transmit the channel statistics and the mobility status information of the UE 101 to the cluster control server 104.
  • the cluster control server 104 may perform clustering.
  • the cluster control server 104 may transmit the clustering result to the DANE 105 and the MCE 106.
  • the DANE 105 may calculate the recommended transmission rate respectively for each of the clusters.
  • the DANE 105 may transmit the recommended transmission rates of all the clusters to the MCE 106.
  • the MCE 106 may transmit the clustering result to the Content Server 107.
  • the order in which the block S111 and other blocks are executed is not limited as long as the block S111 is executed after the block S108 and before block S119.
  • the MCE 106 may allocate radio resources for each of the clusters.
  • the MCE 106 may transmit the radio resource configuration and information of the related cluster (s) of the base station 102 to the base station 102.
  • the base station 102 may create corresponding transmission channel (s) for the related cluster (s) according to the radio resource configuration.
  • the DANE 105 may transmit the recommended transmission rate and the ID of the cluster to which the UE 101 belongs to the UE 101.
  • the recommended transmission rate and the ID of the cluster to which the UE 101 belongs may be carried by the SAND PER message.
  • the order in which the block S115 and other blocks are executed is not limited as long as the block S115 is executed after the block S109 and before block S117.
  • the DANE 105 may notify the UE 101 to select a service bitrate.
  • the UE 101 can be the worst-case one of the UEs in the cluster to which the UE belongs.
  • the UE 101 may select a service bitrate from candidate bitrates included in the MPD.
  • the UE 101 may transmit the service bitrate to the Content Server 107.
  • the Content Server 107 may transmit the video data to the cluster to which the UE 101 belongs via the transmission channel through multicasting.
  • the service bitrate is the actual transmission rate of the video data.
  • Simulation is performed on the method for video multicasting and the video multicast system in the present embodiment, and the simulation configuration is shown as the Table 1 below.
  • Video File Clip of ‘Good Dinosaur’ Format MPEG-4 Codec H. 264 Joint Test Model Channel Model TR 36.873 User number 40 Buffer size 1000kb Transmission power 36dBm Site range 1.5km Number of Base Station antenna 1 Number of UE antenna 1 Bandwidth 1MHz
  • the simulation result of classifying the multicast group into two clusters is shown in FIG. 22, and the simulation result of classifying the multicast group into three clusters is shown FIG. 23.
  • the apparatus for video multicasting may comprise a processor 110 and a communication circuit 120 coupled to the processor 110.
  • the communication circuit 120 can be configured to transmit and receive data, and serve as an interface for the apparatus for video multicasting to communicate with other communication apparatuses.
  • the processor 110 can control the operation of the apparatus for video multicasting, which may also be referred to as a central processing unit (CPU) .
  • the processor 110 may be an integrated circuit chip with signal processing capability, or a general purpose processor, a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic apparatus, a discrete hardware component.
  • the general purpose processor may be a microprocessor or any conventional processor.
  • the processor 110 can be configured to execute instructions to implement the method proposed by any one of the first to third embodiments and non-collision combinations of embodiments of the method for video multicasting according to the present disclosure.
  • the apparatus for video multicasting in the present embodiment can be a cluster control server.
  • the apparatus for video multicasting may comprise a processor 210 and a communication circuit 220 coupled to the processor 210.
  • the communication circuit 220 can be configured to transmit and receive data, and serve as an interface for the apparatus for video multicasting to communicate with other communication apparatuses.
  • the processor 210 can control the operation of the apparatus for video multicasting, which may also be referred to as a central processing unit (CPU) .
  • the processor 210 may be an integrated circuit chip with signal processing capability, or a general purpose processor, a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic apparatus, a discrete hardware component.
  • the general purpose processor may be a microprocessor or any conventional processor.
  • the processor 210 can be configured to execute instructions to implement the method proposed by any one of the fourth to eighth embodiments and non-collision combinations of embodiments of the method for video multicasting according to the present disclosure.
  • the apparatus for video multicasting in the present embodiment can be a DANE.
  • the apparatus for video multicasting may comprise a processor 310 and a communication circuit 320 coupled to the processor 310.
  • the communication circuit 320 can be configured to transmit and receive data, and serve as an interface for the apparatus for video multicasting to communicate with other communication apparatuses.
  • the processor 310 can control the operation of the apparatus for video multicasting, which may also be referred to as a central processing unit (CPU) .
  • the processor 310 may be an integrated circuit chip with signal processing capability, or a general purpose processor, a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic apparatus, a discrete hardware component.
  • the general purpose processor may be a microprocessor or any conventional processor.
  • the processor 310 can be configured to execute instructions to implement the method proposed by any one of the ninth to eleventh embodiments and non-collision combinations of embodiments of the method for video multicasting according to the present disclosure.
  • the apparatus for video multicasting in the present embodiment can be a MCE.
  • the apparatus for video multicasting may comprise a processor 410 and a communication circuit 420 coupled to the processor 410.
  • the communication circuit 420 can be configured to transmit and receive data, and serve as an interface for the apparatus for video multicasting to communicate with other communication apparatuses.
  • the processor 410 can control the operation of the apparatus for video multicasting, which may also be referred to as a central processing unit (CPU) .
  • the processor 410 may be an integrated circuit chip with signal processing capability, or a general purpose processor, a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic apparatus, a discrete hardware component.
  • the general purpose processor may be a microprocessor or any conventional processor.
  • the processor 410 can be configured to execute instructions to implement the method proposed by any one of the twelfth to fourteenth embodiments and non-collision combinations of embodiments of the method for video multicasting according to the present disclosure.
  • the apparatus for video multicasting in the present embodiment can be a Content Server.
  • the apparatus for video multicasting may comprise a processor 510 and a communication circuit 520 coupled to the processor 510.
  • the communication circuit 520 can be configured to transmit and receive data, and serve as an interface for the apparatus for video multicasting to communicate with other communication apparatuses.
  • the processor 510 can control the operation of the apparatus for video multicasting, which may also be referred to as a central processing unit (CPU) .
  • the processor 510 may be an integrated circuit chip with signal processing capability, or a general purpose processor, a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic apparatus, a discrete hardware component.
  • the general purpose processor may be a microprocessor or any conventional processor.
  • the processor 510 can be configured to execute instructions to implement the method proposed by any one of the fifteenth to eighteenth embodiments and non-collision combinations of embodiments of the method for video multicasting according to the present disclosure.
  • the apparatus for video multicasting in the present embodiment can be a user equipment or a stand-alone component which can be integrated in the user equipment such as a baseband chip.
  • the apparatus for video multicasting may comprise a processor 610 and a communication circuit 620 coupled to the processor 610.
  • the communication circuit 620 can be configured to transmit and receive data, and serve as an interface for the apparatus for video multicasting to communicate with other communication apparatuses.
  • the processor 610 can control the operation of the apparatus for video multicasting, which may also be referred to as a central processing unit (CPU) .
  • the processor 610 may be an integrated circuit chip with signal processing capability, or a general purpose processor, a digital signal processor (DSP) , an application specific integrated circuit (ASIC) , a field programmable gate array (FPGA) or other programmable logic device, a discrete gate or transistor logic apparatus, a discrete hardware component.
  • the general purpose processor may be a microprocessor or any conventional processor.
  • the processor 610 can be configured to execute instructions to implement the method proposed by the nineteenth embodiment of the method for video multicasting according to the present disclosure.
  • the apparatus for video multicasting in the present embodiment can be a base station or a stand-alone component which can be integrated in the base station such as a baseband board
  • the readable storage medium may comprise a storage 710.
  • the storage 710 can store instructions which can implement the method proposed by any one of the first to seventh embodiments and non-collision combinations of embodiments of the method for video multicasting according to the present disclosure while executed.
  • the storage 710 may be a read-only memory (ROM) , a random access memory (RAM) , a flash memory, a hard disk, or an optical disk, etc..
  • ROM read-only memory
  • RAM random access memory
  • flash memory a hard disk
  • optical disk etc.
  • the apparatuses and methods disclosed herein can also be implemented in other forms. Rather, the apparatuses as described are merely illustrative. For example, the division of modules or units is performed solely based on logic functions, thus in actual implementations there may be other division methods, e.g., multiple units or components may be combined or integrated onto another system, or some features may be ignored or simply not executed.
  • mutual couplings, direct couplings, or communications connections as displayed or discussed may be achieved through some interfaces, devices, or units, and may be achieved electrically, mechanically, or in other forms.
  • Separated units as described may or may not be physically separated.
  • Components displayed as units may or may not be physical units, and may reside at one location or may be distributed to multiple networked units. Part or all of the units may be selectively adopted according to actual requirements to achieve objectives of the disclosure.
  • various functional units described herein may be integrated into one processing unit or may be present as a number of physically separated units, and two or more units may be integrated into one.
  • the integrated units may be implemented by hardware or as software functional units.
  • the integrated units are implemented as software functional units and sold or used as standalone products, they may be stored in a computer readable storage medium.
  • the essential technical solution or all or part of the technical solution of the disclosure may be embodied as software products.
  • Computer software products can be stored in a storage medium and can include multiple instructions enabling a computing device (e.g., a personal computer, a server, a network device, etc. ) or a processor to execute all or part of the methods as described in the disclosure.
  • the storage medium may include all kinds of media that can store program codes, such as a USB flash disk, mobile hard drive, read-only memory (ROM) , random access memory (RAM) , magnetic disk, or optical disk.

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Abstract

L'invention concerne des procédés de multidiffusion de vidéo. Un procédé consiste à : obtenir, par un serveur de commande de grappe, des informations d'un ou de plusieurs groupes de multidiffusion, chacun du ou des groupes de multidiffusion comprenant au moins deux équipements d'utilisateur (UE), et tous les UE dans un même groupe de multidiffusion demandant un même service de multidiffusion de vidéo; recevoir, par le serveur de commande de grappe, des statistiques de canal et des informations d'état de mobilité des UE; classifier, par le serveur de commande de grappe, les UE dans chacun du ou des groupes de multidiffusion en au moins deux grappes selon les statistiques de canal et les informations d'état de mobilité, les statistiques de canal et les informations d'état de mobilité de tous les UE dans une même grappe étant dans une même plage; et transmettre, par le serveur de commande de grappe, le résultat de mise en grappe à d'autres éléments de réseau (NE) de multidiffusion de sorte que chacune des grappes corresponde à un canal de transmission utilisé pour transmettre des données de vidéo par multidiffusion. L'invention concerne également des appareils associés pour la multidiffusion de vidéo et un support de stockage lisible.
PCT/CN2017/108557 2017-10-31 2017-10-31 Procédés, appareils et support de stockage lisible pour multidiffusion de vidéo WO2019084764A1 (fr)

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