Multimedia communication cooperative multicast transmission method in cognitive radio network

A multimedia communication and cognitive radio technology, applied in the field of multimedia communication cooperative multicast transmission, can solve the problems of not being able to fully mobilize the enthusiasm of primary and secondary users, reducing the rate of the transmitter, and limiting the throughput of the network system

CN105657672AActive Publication Date: 2016-06-08西安旭彤电子科技股份有限公司
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Publication Date
2016-06-08

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Abstract

The present invention discloses a multimedia communication cooperative multicast transmission method in a cognitive radio network. The method comprises a first step that a main network sends parameter information to a cognitive relay; a second step that a maximum data bit amount of users in a multicast group is calculated; a third step that the main network determines whether the bit amount of a basic layer meets requirements, if not, a fourth step is carried out, if yes, a fifth step is carried out; the fourth step that the main network combines a cooperative transmission time proportion and a cooperative power that are determined finally, a main user uses a front alpha i part to transmit basic layer data, and a cognitive user uses the left (1-alpha i) part to transmit its own information; the fifth step that the main user uses a front alpha j part to transmit basic layer data, and the cognitive user uses left (1-alpha j) part to transmit its own information; and a sixth step that whether the frame is finished is determined, if not, the second step is carried out, if yes, transmission of the frame data is finished. Through adoption of the method, the system throughput of the main network can be improved effectively, the cognitive network transmission opportunities are increased, the transmission reliability and stability are high, and the method can be applied to a cognitive radio multimedia cooperative multicast system.
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Description

technical field

[0001] The invention relates to the field of wireless communication, in particular to a cooperative multicast transmission method for multimedia communication in a cognitive radio network. Background technique

[0002] Due to the rapid development of wireless communication technology and various terminal applications, people's demand for wireless spectrum has increased significantly. Under the ever-increasing social demand, people need to centrally present services such as text, graphics, images, audio and video on terminals. In the foreseeable future, people's demand for wireless spectrum will be concentrated in multimedia applications such as video websites, peer-to-peer multimedia networks, and distributed games. However, spectrum resources are very limited and precious resources. Due to the fixed allocation mechanism of existing spectrum management, with the rapid development of various communication services, wireless spectrum has become a scarce resour...

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Embodiment Construction

[0061] The present invention will be further described below in conjunction with the accompanying drawings. It should be noted that this embodiment is based on the technical solution, and provides detailed implementation and specific operation process, but the protection scope of the present invention is not limited to the present invention. Example.

[0062] Such as figure 1 As shown, the cooperative multicast network used in the present invention includes a primary user transmitter, M primary network multicast group users, a cognitive user transmitter and a cognitive user receiver, wherein the cognitive user transmitter is used as the cognitive user transmitter The known relay assists the main network in transmitting multimedia data. It is assumed that all main network user receivers receive the same data stream at the same time. The original multimedia multicast data is compressed into a base layer and an enhancement layer data at the main network transmitter. The schedu...