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Opportunistic NOMA cooperative multicast method

A cooperative multicast and opportunistic technology, applied in the directions of broadcast service distribution, diversity/multi-antenna system, location diversity, etc., can solve the problem that the performance of unicast users is not guaranteed, and achieve the effect of reducing overhead and reducing load

Active Publication Date: 2020-06-26
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, although this method fully considers the reliability of multicast users, the performance of unicast users is not guaranteed, and there are only two orders of diversity gain

Method used

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  • Opportunistic NOMA cooperative multicast method
  • Opportunistic NOMA cooperative multicast method
  • Opportunistic NOMA cooperative multicast method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] Embodiment 1: An opportunistic NOMA cooperative multicast method. The base station accesses all multicast users and all unicast users at the same time. The base station encodes and modulates the original signals required by the unicast users and The broadcast user sends it, and the multicast user decodes the received signal, including the following steps:

[0055] The base station broadcasts the ID sequence of the selected multicast user to each multicast user;

[0056] The base station broadcasts a cooperative link channel gain acquisition request signal including the selected multicast user ID to each unicast user;

[0057] Each unicast user broadcasts a channel gain acquisition request signal to multicast users selected by the base station in response to the received cooperative link channel gain acquisition request signal;

[0058] Each selected multicast user receives the broadcast channel gain acquisition request signal of each unicast user, and determines the ch...

Embodiment 2

[0080] Embodiment 2: An opportunistic NOMA cooperative multicast method, which simultaneously accesses all multicast users and all unicast users, including the following steps:

[0081] Coding and modulating the original signals of unicast users and multicast users and sending the modulated signals to all multicast users;

[0082] broadcast the ID sequence of the selected multicast user to each multicast user;

[0083] Broadcasting a cooperative link channel gain acquisition request signal containing the selected multicast user ID sequence to each unicast user;

[0084] Receiving the broadcast signaling sent by the multicast user with the highest channel gain of the worst forwarding link with each unicast user in response to the channel gain acquisition request signal sent by each unicast user among the selected multicast users, the broadcast signaling Let contain the best multicast user ID and its ID.

[0085] On the basis of this embodiment, further, the selected multicast u...

Embodiment 3

[0096] Embodiment 3: An opportunistic NOMA cooperative multicast method, which simultaneously accesses all multicast users and all unicast users, includes the following steps: receiving a coded and modulated signal sent by a base station and decoding the coded signal;

[0097] The multicast user receives the ID sequence of the selected multicast user broadcast by the base station;

[0098] The selected multicast user receives the broadcast channel gain acquisition request signal of each unicast user, and determines the channel gain of the worst forwarding link between itself and each unicast user. If it is judged that the channel gain of the worst forwarding link between itself and each unicast user is the highest, Sending broadcast signaling including the best multicast user identifier and ID to the base station as the best multicast user;

[0099] The optimal multicast user recodes, modulates and forwards the decoded unicast user information.

[0100] On the basis of the ab...

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Abstract

The invention discloses an opportunistic cooperative multicast method. The method comprises the following steps that: a base station recodes, modulates and forwards unicast user information obtained by decoding as an optimal multicast user according to the worst forwarding link channel gain of each selected multicast user and each unicast user if the multicast user judges that the worst forwardinglink channel gain with all the unicast users is the highest. According to the invention, the link state from a multicast user to a unicast user is considered in the collaborative multicast method; nomatter for one or more unicast users, the performance of the unicast users can be guaranteed under the condition that the link gain from the multicast users to the unicast users is poor.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an opportunistic NOMA cooperative multicast method. Background technique [0002] With the rapid development of mobile communications, the 4G network that has been commercialized on a large scale around the world can no longer meet the needs of users in high user density and high mobile scenarios. In order to "face 2020 and the future", 5G has become a research hotspot in the global wireless communication field. Diversified application scenarios and multiplied performance indicators have led to the increasing scarcity of wireless spectrum resources, which imposes strict requirements on 5G multiple access technology. Among the existing multiple access technologies, the non-orthogonal multiple access (Non-Orthogonal Multiple Access, NOMA) technology stands out. The latest research results show that non-orthogonal multiple access technology transmits multiple inform...

Claims

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Application Information

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IPC IPC(8): H04W40/22H04W40/12H04W4/08H04L12/761H04B7/026H04L45/16
CPCH04W40/22H04W40/12H04W4/08H04L45/16H04B7/026
Inventor 陆音陈继荣杨楚瀛李滔森王秀梅朱洪波
Owner NANJING UNIV OF POSTS & TELECOMM
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