一种基于视频帧结构和D2D通信的视频多播方法

本发明公开了一种基于视频帧结构和D2D通信的视频多播方法，基站声明某个视频多播服务，小区中所有感兴趣的用户加入该服务并形成多播簇；以视频编码中的一个基本单位GOP的传输时间为周期，基站将视频流多播给簇内用户；在多播子时隙结束后，用户检查自己收到的信息，将GOP中有分组丢失的帧的序号上报给基站；基站接收用户的反馈信息，根据待修复帧的优先级建立顺序表，建立目标帧ACK-devices、NACK-devices之间D2D链路的CQI矩阵；根据CQI矩阵进行中继选择和分组，计算传输目标帧m需要的时间T；传输完成，删除顺序表中当前目标帧的序号。本发明有效克服多媒体多播中多播速率总是受到簇内最差衰落信道的...

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Bibliographic Details
Format Patent
LanguageChinese
Published 13.09.2019
Subjects
ELECTRIC COMMUNICATION TECHNIQUE
ELECTRICITY
TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHICCOMMUNICATION
WIRELESS COMMUNICATIONS NETWORKS
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Summary:本发明公开了一种基于视频帧结构和D2D通信的视频多播方法，基站声明某个视频多播服务，小区中所有感兴趣的用户加入该服务并形成多播簇；以视频编码中的一个基本单位GOP的传输时间为周期，基站将视频流多播给簇内用户；在多播子时隙结束后，用户检查自己收到的信息，将GOP中有分组丢失的帧的序号上报给基站；基站接收用户的反馈信息，根据待修复帧的优先级建立顺序表，建立目标帧ACK-devices、NACK-devices之间D2D链路的CQI矩阵；根据CQI矩阵进行中继选择和分组，计算传输目标帧m需要的时间T；传输完成，删除顺序表中当前目标帧的序号。本发明有效克服多媒体多播中多播速率总是受到簇内最差衰落信道的影响，从用户角度出发在有限频谱资源内较大程度地提高视频质量。 The invention discloses a video frame structure and D2D (Device-to-Device) communication based video multicast method. The video frame structure and D2D communication based video multicast method comprises steps that a base station announces a video multicast service, and all the interested users in a cell join in the service to form a multicast cluster; the base station carries out video stream multicast for the users in the cluster by regarding the transmission time of one basic unit GOP (Group of Pictures) in a video code as a cycle; the users check received information and report sequence numbers of frames having packet loss in the GOP to the base station after the multicast sub t
Bibliography:Application Number: CN201610792700