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A Cooperative Multicast Transmission Method Based on Non-Orthogonal Multiple Access Technology

A technology of non-orthogonal multiple access and access technology, which is applied in the field of cooperative multicast transmission based on non-orthogonal multiple access technology, and can solve the problem of not considering the individual data transmission needs of differentiated users, low flexibility, and different Suitable for application etc.

Active Publication Date: 2019-11-01
西安旭彤电子科技股份有限公司
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  • Claims
  • Application Information

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Problems solved by technology

However, most of the nodes participating in the cooperation in the existing cooperative multicast technology are specially deployed relays or multicast users in the network, and the application flexibility is low. In addition, the common requirements of communication network users are not considered Individual data transmission requirements to differentiated users are not suitable for general networks where multicast users and unicast users coexist

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  • A Cooperative Multicast Transmission Method Based on Non-Orthogonal Multiple Access Technology
  • A Cooperative Multicast Transmission Method Based on Non-Orthogonal Multiple Access Technology
  • A Cooperative Multicast Transmission Method Based on Non-Orthogonal Multiple Access Technology

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Embodiment Construction

[0056] 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.

[0057] like figure 1 As shown, the wireless multicast network used in the present invention includes a base station, N unicast users and M multicast users, wherein the unicast users serve as cooperative relays to assist the base station in forwarding data to the multicast users. The execution of a contains at most 2 transmission time units.

[0058] like figure 2 Shown, the realization steps of the present invention are as follows:

[0059] A cooperative multicast transmission method based on non-orthogonal multiple access technology, the network includes a base station, N unicast users and M multicast users, wherein the uni...

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Abstract

The invention discloses a non-orthogonal multiple access technology-based cooperative multicast transmission method, the steps of which are: S1, the base station constructs a unicast user candidate set S2, and the base station selects the optimal unicast user d from the candidate set n* Simultaneously access the network with multicast users; S3, the base station sends a signal S BS (t) for all multicast users and optimal unicast user d n* ; S4, unicast user d n* Received S BS (t) After decoding the multicast user signal S 0 (t), if successfully decoded, go to S5, otherwise go to S6; S5, unicast user d n* Through serial interference cancellation technique from S BS Remove S from (t) 0 (t) After decoding the desired signal S 1 (t) and forward the multicast user signal, after the multicast user receives the forwarded signal, combine the signal with the signal received from the base station, and decode the desired signal S 0 (t); S6, unicast user d n* (multicast users) respectively directly from the signal S BS (t) Decoding own desired signal S 1 (t)(S 0 (t)). The invention can effectively improve the anti-interruption performance of multicast communication, provide transmission opportunities for unicast users, improve spectral efficiency, and can be used in multimedia multicast transmission systems.

Description

technical field [0001] The invention relates to the field of wireless communication, in particular to a cooperative multicast transmission method based on non-orthogonal multiple access technology. Background technique [0002] The development of wireless communication services and mobile terminal applications has brought about a blowout growth in data traffic, which has increased people's demand for spectrum resources. As a new type of wireless service, wireless multicast transmission utilizes the broadcast characteristics of wireless channels, and regards all users who have the same demand for specific resources during the transmission process as a multicast group, and delivers the same information to all multicast users at the same time. It is a wireless service with high spectrum efficiency and can be widely used in communication scenarios such as video on demand, video conferencing, and multimedia education. [0003] In wireless multicast transmission, due to the need ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W4/06H04W40/22H04W72/00H04W72/04
CPCH04W4/06H04W40/22H04W72/0453H04W72/0473H04W72/30Y02D30/70
Inventor 杨龙陈健贺冰涛吕璐阔永红
Owner 西安旭彤电子科技股份有限公司
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