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Self-backhaul method of heterogeneous network

A heterogeneous network, self-backhaul technology, used in network planning, advanced technology, wireless communication, etc.

Active Publication Date: 2019-06-14
NORTHWEST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The purpose of the present invention is to propose an effective self-backhaul method for realizing large-scale MIMO full-duplex heterogeneous network using non-orthogonal multiple access technology, so as to solve the problem of simultaneously realizing uplink, downlink and backhaul transmission question

Method used

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  • Self-backhaul method of heterogeneous network

Examples

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Embodiment 1

[0054] The present invention proposes a heterogeneous network composed of macro cells and small cells, considering uplink and backhaul transmission, as well as downlink, such as figure 1 shown.

[0055] Same-frequency deployment K+1 layer heterogeneous network, the first layer is the macro cell, and the rest K Layers are small cells. Densely deployed small base stations are connected to the core network through the backhaul provided by the macro base station. Both macro base stations and small base stations use full-duplex technology. When a link is established between a small base station and a macro base station, it is a small cell backhaul link. When a link is established between a user equipment and a small base station, it is a small cell access link. When a link is established between a macro base station and a user equipment, it is a small cell access link. is the access link of the macro cell.

[0056] Full-duplex technology is used for macro base stations using m...

Embodiment 2

[0066] Based on Example 1, such as figure 1 As shown, this method is based on a K+1 layers of heterogeneous networks. It can be seen from the figure that the macro base station, the small base station and the user simultaneously receive and transmit information, and both the macro base station and the small base station use massive MIMO technology. like Image 6 As shown, the signal power and link reliability are improved by coherently processing the signal at multiple transceiver ports to achieve diversity gain. Using massive MIMO technology, separate links can be created to transmit independent data streams, providing more degrees of freedom for propagation channels and enabling multiplexing.

[0067] In addition, if Figure 7 As shown, in the heterogeneous network of this method, the small base station applies NOMA in the power domain. For users with poor channel conditions, larger power is allocated when sending information, and vice versa for users with better channel...

Embodiment 3

[0069] like Figure 8 As shown, the uplink transmission in two cells has The massive MIMO network representation from the first k The available channel gain from a user to its serving massive MIMO base station. Assuming i.i.d. Rayleigh fading channel model, the base station in the lth cell and the first k The complex propagation coefficient among users can be calculated as:

[0070]

[0071] is the complex fast fading factor, representing the first channel matrix of all users k List , is the magnitude factor affecting collective attenuation and shadow fading, assumed to be constant over frequency and the exponential of the base station antenna because geometric attenuation and shadow fading vary very slowly with respect to the spatial dimension, and gives:

[0072] ,

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Abstract

The invention discloses a self-backhaul method of a heterogeneous network. The influence of a multi-layer heterogeneous network with high frequency spectrum and energy efficiency and a NOMA technologyon the system signal and interference plus noise ratio, the coverage probability and the energy efficiency in a small base station is considered. A small cell of a single antenna is covered by a macro cell using a large scale MIMO technique. NOMA is used for backhaul and downlink access at each small base station. By utilizing a full duplex technology, the small base station communicates with theuser equipment through an uplink and downlink. Meanwhile, a power domain NOMA technology is utilized, and the small base stations superpose backhaul on a downlink access link based on a power sharingcoefficient. Uplink and downlink transmission backhaul are performed simultaneously at each small base station. Meanwhile, the macro base station is composed of a large-scale MIMO transmitting antenna and a large-scale MIMO receiving antenna, and by means of the full duplex technology, the macro base station communicates with the user equipment through the large-scale MIMO transmitting antenna and receives the backhaul through the cascaded small base station receiving antenna. And all the transmissions on the macro base station and the small base station are executed on the same time-frequency resource.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to an effective self-backhaul transmission method for realizing a large-scale MIMO full-duplex heterogeneous network by using NOMA. Background technique [0002] Driven by the rapid growth of new applications and wireless communications, the demand for network performance continues to increase, and the market requires that the next-generation network should support a higher system capacity (about 1000 times) than the current generation network, so the fifth generation (5G) communication The system has become a hot spot in academia. Compared with the 4G currently in use, the 5G network greatly improves the network performance in terms of system capacity, energy efficiency, spectrum efficiency and data rate. [0003] Massive MIMO, heterogeneous networks and full duplex are extremely important technologies with great development potential in 5G networks. Among them, ma...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/18H04B7/0413
CPCY02D30/70
Inventor 贾向东杨小蓉纪澎善
Owner NORTHWEST NORMAL UNIVERSITY
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