Channel allocation method for D2D multicast video transmission in social perception network

A technology of video transmission and channel allocation, which is applied in transmission monitoring, transmission system, machine-to-machine/machine-type communication services, etc., which can solve the problem of affecting social wireless communication video transmission work, low spectrum utilization rate, and low user access rate and other issues, to achieve the effect of improving spectrum resource utilization, increasing user access rate, and unloading load

Inactive Publication Date: 2019-06-28
XIDIAN UNIV
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Problems solved by technology

[0003] In the existing video multicast transmission process, there are problems such as system user capacity, low spectrum utilization rate, and low user access rate, which seriously affect the video transmission work of social wireless communication. Therefore, we propose a social awareness network Channel allocation method for D2D multicast video transmission

Method used

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  • Channel allocation method for D2D multicast video transmission in social perception network
  • Channel allocation method for D2D multicast video transmission in social perception network
  • Channel allocation method for D2D multicast video transmission in social perception network

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Experimental program
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Embodiment 1

[0026] see Figure 1-5

[0027] (1) Firstly, D2D multicast clusters are formed according to the physical distance threshold, social relationship threshold and SINR constraints in the first stage, and the cluster head user set H and the cellular user set C in the D2D multicast stage are obtained.

[0028] 1) From the cellular user set H C To select the cluster head user h, it needs to satisfy: where e i,j It is a comprehensive indicator parameter of physical conditions, social relationship conditions and SINR conditions;

[0029] 2) Traverse the D2D user set H D User h in d , if satisfied: Then join the D2D multicast cluster set H with user h as the cluster head D (h). If set H D The number of elements in (h) is the number of D2D users n h ≥1, add user h to the cluster head user set H, and remove it from the clustered cellular user set C, that is, C=C-{h}, and at the same time add the multicast cluster set H D (h) Join the clustered D2D user set D, that is, D=D+H ...

Embodiment 2

[0043] see Figure 4

[0044] The physical distance and social relationship constraints are different, and the user access rate is different. When the constraints are appropriate, the access rate of D2D users can reach 90%, and the number of D2D users has almost no influence on the access rate.

Embodiment 3

[0046] see Figure 5

[0047] As the number of D2D users increases, the throughput of D2D users also increases continuously. The throughput of D2D users is the throughput gain brought by the addition of D2D communication to the system.

[0048] The working principle of this embodiment: the channel allocation strategy for D2D multicast video transmission in the social awareness network, first transmits the video multicast to the cellular users in the cell through the base station, and then forms the D2D multicast according to the physical distance threshold and the social relationship threshold At the same time, the access control of the D2D multicast group is based on the minimum SINR requirement and the maximum transmit power constraint, and the throughput gain obtained by multiplexing the cellular user m with the multicast group n is used as the weight, and through the D2D multicast group and Bipartite matching between cellular users leads to optimal channel allocation that...

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Abstract

The invention relates to a channel allocation method for D2D multicast video transmission in a social perception network. The channel allocation method comprises the step of D2D multicast cluster, access control, optimal transmitting power allocation, and optimal channel allocation. The beneficial effects of the invention are as follows: the paint has good effects. According to the channel allocation strategy for D2D multicast video transmission in the social perception network, D2D multicast communication of two stages is added into video transmission of a traditional cellular network. Therefore, D2D multicast communication in the first stage is realized. A video can be transmitted to cellular users in a cell in a multicast manner through a base station. A full-load transmission process is realized; if yes, D2D multicast communication in the second stage is carried out, firstly, cellular users capable of serving as cluster heads of the D2D multicast groups are selected, and after theD2D multicast clusters are formed, the cluster head users forward video data received by the cluster head users to the D2D users in the multicast groups in a mode of multiplexing uplink channel spectrum resources of other cellular users.

Description

technical field [0001] The present invention relates to the technical field of video transmission in wireless communication, in particular to a channel allocation method for D2D multicast video transmission in a social awareness network. Background technique [0002] In recent years, with the popularization of smart terminals, the number of users has been increasing, and the number of video services has also been increasing. Traditional video multicast communication centered on base stations is facing the problem of overloading of base stations, and the current limited spectrum resources cannot allow all All end users are connected to the network, and the D2D communication technology enables geographically adjacent devices to communicate directly with each other without accessing the base station by multiplexing licensed spectrum resources. [0003] In the existing video multicast transmission process, there are problems such as system user capacity, low spectrum utilization...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W4/70H04W48/02H04W48/10H04W52/24H04W52/36H04B17/382
Inventor 裴雪阳陈健
Owner XIDIAN UNIV
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