KR101371997B1 - Method and apparatus for polarization antenna transmission using distributed nodes - Google Patents

Abstract

A communication system for performing polarized antenna communication includes a first strong node node comprising a first polarized antenna using six different polarizations, a second strong node including a second polarized antenna using six different polarized waves, and the first strong node. And a distributed node that transmits data to the second node in cooperation with the first node to increase the degree of freedom gain between the node and the second node.

Description

Method for transmitting polarized antenna using distributed node {METHOD AND APPARATUS FOR POLARIZATION ANTENNA TRANSMISSION USING DISTRIBUTED NODES}

The present invention is a transmission capacity increase system of a polarization antenna by using a distributed node.

Due to the increase in smart phone applications and the demand for multimedia services, research is being conducted to increase the communication capacity between nodes. To increase capacity, a multiple antenna system (MIMO system) using multiple antennas has been devised. However, such a MIMO system has a limitation in that the number of antennas cannot be increased in an environment having a space constraint such as a base station.

In order to solve the above problems, a system using distributed nodes in antennas having different polarization components has been proposed, and a lot of research and technology development are currently in progress.

The present invention provides an increase in the polarization antenna communication capacity by using a distributed node with the degree of freedom gain obtained in one effective electromagnetic wave progression.

In addition, the present invention provides a minimized environment of base nodes and distributed nodes.

In addition, the present invention provides a system that minimizes the power of a base node using distributed nodes.

A communication system for performing polarized antenna communication using a distributed node according to an embodiment of the present invention includes a first base node including a first polarized antenna using six different polarizations, and a second polarized antenna using six different polarized waves. A distributed node that transmits data to the second base node in cooperation with the first base node to increase a degree of freedom gain between the second base node and the first base node and the second base node; It includes.

The first base node comprising the first polarized antenna using the six different polarizations may be configured such that the six eigenvalues corresponding to the channel between the first base node and the second base node are in order of magnitude. A first eigenvalue, a second eigenvalue, a third eigenvalue, a fourth eigenvalue, a fifth eigenvalue, and a sixth eigenvalue, wherein the distributed node effectively applies the third eigenvalue and the fourth eigenvalue. The polarization antenna communication system cooperating with the second base node may be included to increase.

The second base node including the second polarized antenna using the six different polarizations may include the six eigenvalues corresponding to the channel between the first base node and the second base node in order of magnitude. A first eigenvalue, the second eigenvalue, the third eigenvalue, the fourth eigenvalue, the fifth eigenvalue, and the sixth eigenvalue, wherein the distributed node comprises the third eigenvalue and the fourth eigenvalue. And the polarization antenna communication system cooperating with the first base node to effectively increase eigenvalues.

The distributed node, which transmits data to the second node, in cooperation with the first node to increase the degree of freedom gain between the first node and the second node, the first node and the node. And a polarization antenna communication that increases the number of propagation paths of valid electromagnetic waves existing between the second node nodes.

Each of the first base node and the second base node may include three antennas having different polarizations.

The distributed node may include a communication system for performing polarized antenna communication using six different polarizations.

The distributed node may include a communication system for adaptively performing polarized antenna communication using some of the six different polarizations.

In addition, a communication system for performing polarized antenna communication according to an embodiment of the present invention includes a first node, a second node, and at least one distributed node, wherein the first node includes six different polarizations. A first polarization antenna for use, wherein the second strong node is a second polarization antenna for use of six different polarizations, and the at least one distributed node is disposed between the first strong node and the second strong node. When transmitting data to the second node in cooperation with the first node in order to increase the degree of freedom gain, the first node receives some of the data that must be transmitted from the first node to the second node. Sharing a node node and the at least one distributed node and the first node and the at least one distributed node cooperate with each other Transmitting the write data to the second base node.

The sharing of some of the data that should be transmitted from the first node to the second node may be shared between the first node and the at least one distributed node from the first node to the second node. The first base node and the at least one distributed node share some of the data to transmit data at the same time.

The first node and the at least one distributed node to cooperate with each other to transmit the data to the second node, the first node and the at least one distributed node in cooperation with each other sharing the data And simultaneously transmitting to the second base node.

The present invention can increase the capacity of polarized antenna communication by using a distributed node with the degree of freedom gain obtained in one effective electromagnetic wave progression.

In addition, the present invention can provide a minimized environment of base nodes and distributed nodes.

In addition, the present invention can provide a system that minimizes the power of the base node using a distributed node.

1 is a diagram illustrating an organic topology network viewed from a control plane and a user plane.
2 is a diagram illustrating data flow in an organic topology network.
3 is a diagram illustrating an organic topology network including a plurality of cooperative clusters.
4 is a diagram illustrating two node nodes transmit and receive signals.
5 is a diagram illustrating a channel configuration in communication between general node nodes.
FIG. 6 is a graph illustrating the eigenvalue fraction according to the distance between the transmitter and the receiver in the environment of FIG. 5.
7 is a graph illustrating a capacity distribution according to a distance between a transmitting and receiving end in the environment of FIG. 5.
FIG. 8 is a diagram illustrating a channel configuration when a distributed node is added in FIG. 5.
FIG. 9 is a graph illustrating capacity analysis according to a distance between a transmitting and receiving end while adjusting the number of antennas of a distributed node in the environment of FIG. 8.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a diagram illustrating an organic topology network viewed from a control plane and a user plane.

Before describing FIG. 1, the organic topology network according to the present invention includes a plurality of terminals, distributed nodes serving terminals, node nodes managing the distributed nodes, and traffic managing traffic for the node nodes. And an organic topology management device configured to control the centralized node, the distributed nodes, and the traffic concentrated node among the node nodes.

Here, the terminals may be smartphones, PCs, laptops, smart TVs, etc., and the distributed nodes serve as access points as micro cells (base stations), pico cells, femto cells, etc., having a relatively narrow range of coverage. In particular, distributed nodes may support the L2 layer.

Also, node nodes may support a L3 layer as nodes having a relatively wide range of coverage (eg, macro cells). For example, if distributed nodes have coverage of several meters to hundreds of meters, base nodes may have coverage of several hundred meters to several kilometers. As will be described below, the node nodes can pass the information needed to adaptively form a cooperative cluster to the organic topology management device.

The traffic concentrating node collects the traffic received from the node nodes and transmits it to the core network or sends the traffic received from the core network to the node nodes.

In addition, the organic topology management apparatus is responsible for routing between the traffic concentrating node, the base node and the distributed node, and not only manage cooperative clusters, but also manage locations of terminals. The traffic concentrating node and the organic topology management device may be physically implemented as one device or may be implemented separately.

Referring to FIG. 1, when an organic topology network is viewed on a control plane, an organic topology controller (OTC) and an anchor node (AN) transmit control information through an control channel (AN Control Channel). Send / receive Such control information is transmitted / received between base nodes and distributed nodes (DNs) via a DN control channel.

Looking at the organic topology network on the user plane, a traffic aggregation node (TAN) forwards traffic through the node nodes to the distributed nodes, and the traffic from the distributed nodes also passes through the node nodes to the traffic concentration node. Are concentrated.

2 is a diagram illustrating data flow in an organic topology network.

Referring to FIG. 2, the organic topology network of the present invention may include two or more traffic concentration nodes. Traffic from each of the traffic concentrating nodes is transmitted to the node nodes through Link-12, and each of the node nodes transmits the traffic through Link-23 to distributed nodes belonging to the cooperative cluster. The distributed nodes transmit traffic to the terminal through Link-34, and the terminal may transmit / receive traffic from node nodes as well as distributed nodes. Although the link between the terminal and the base node is not shown in FIG. 2, it may be called Link-24.

Such links may be wired or wireless links. More specifically, Link-12 and 23 may be implemented by a wired cable, or may be implemented by a wireless link using MIMO beamforming and beam division multiple access (BDMA) technology based on a polar antenna. Link-34 is a wireless link. Here, according to the MIMO beamforming technique, when scattering occurs in a channel, channel information (channel constant value) is notified to the transmitting end, and the transmitting end performs beamforming in the receiving end direction. In particular, according to the MIMO beamforming technique based on the polar antenna, it is possible to transmit a plurality of streams by increasing the degree of freedom of the channel by using an electric dipole or a magnetic dipole.

3 is a diagram illustrating an organic topology network including a plurality of cooperative clusters.

Referring to FIG. 3, an organic topology network includes a plurality of cooperative clusters. Each of the cooperating clusters includes a base node and distributed nodes and cooperates for at least one terminal.

Some of the distributed nodes may or may not be included in the cooperating cluster. Distributed nodes included in the cooperative cluster transmit / receive data and control information from the corresponding node nodes.

4 is a diagram illustrating two node nodes transmit and receive signals.

As shown in FIG. 4, it is assumed that the distance between the base nodes is long. For example, macro base stations of a cellular communication system are located at a distance relatively longer than the distance between femto cells or pico cells.

When node nodes transmit / receive signals wirelessly, node nodes may use two or more antennas with different polarizations. In other words, the node nodes can generate different polarizations using at least one electrical dipole and at least one magnetic dipole. One electrical dipole and one magnetic dipole may be physically implemented using one dipole.

For example, three electrical dipole antennas orthogonal to each other and three magnetic dipole antennas orthogonal to each other may be used. In such a case, there may be six nonzero eigenvalues between the node nodes, which may theoretically result in six times the capacity improvement than when one eigenvalue exists.

However, when the distance between the node nodes is far, or the number of valid passes among the node nodes is small, and the correlation between the paths is relatively high, the difference between the eigenvalues increases. This may limit capacity. In particular, since macro base stations of a cellular communication system are generally far apart from each other, even six electric dipole antennas and three magnetic dipole antennas may be difficult to expect a six times capacity improvement.

5 is a diagram illustrating a channel configuration in communication between general node nodes.

As shown in FIG. 5, in a distributed environment, when a single polarization is used at one point, one eigen value may be obtained. Using polarization techniques, a total of six nonzero eigenvalues can be obtained. However, in general, since the distance between the base node is very far, the progress of the two electromagnetic waves can be compared to the progress of the remaining electromagnetic waves as shown in FIG.

FIG. 6 is a graph illustrating the eigenvalue fraction according to the distance between the transmitter and the receiver in the environment of FIG. 5.

As shown in FIG. 6, the eigenvalues found in the communication between the general node nodes are two large eigenvalues, two lower eigenvalues, and two eigenvalues close to zero not shown on the graph. Can be divided. Among them, the portion related to the capacity increase of the channel becomes two large eigenvalues, and if the remaining eigenvalues are increased, the transmission capacity may be increased.

7 is a graph illustrating a capacity distribution according to a distance between a transmitting and receiving end in the environment of FIG. 5.

As shown in FIG. 7, in a distributed environment, when a single polarization is used at one point, one eigen value may be obtained, and when a polarization technique is used, a total of six eigenvalues may be obtained instead of six zeros. In this environment, the capacity distribution according to the distance between the transmitter and the receiver is the highest when the signal-to-noise ratio is 30dB.

FIG. 8 is a diagram illustrating a channel configuration when a distributed node is added in FIG. 5.

A first point node comprising a first polarization antenna using six different polarizations in the environment of FIG. 8 and in FIG. 5, a second point node comprising a second polarization antenna using six different polarizations, wherein And a distributed node that transmits data to the second node in cooperation with the first node in order to increase the degree of freedom gain between the first node and the second node.

The six eigenvalues corresponding to the channel between the first node and the second node may include a first eigenvalue, a second eigenvalue, a third eigenvalue, a fourth eigenvalue, a fifth eigenvalue and And a sixth eigenvalue, wherein the distributed node may include polarized antenna communications cooperating with the first base node to effectively increase the third eigenvalue and the fourth eigenvalue.

Each of the first base node and the second base node may include three antennas having different polarizations.

The distributed node may adaptively use some of the six different polarizations.

The distributed node may increase the number of propagation paths of valid electromagnetic waves existing between the first node and the second node.

9 is a graph showing the capacity change of eigenvalues using at least one distributed node between node nodes.

As shown in FIG. 9, the capacity change of the eigenvalues using at least one distributed node between the node nodes includes a first node, a second node and at least one distributed node, wherein the first node Includes a first polarized antenna using six different polarizations, the second base node comprises a second polarized antenna using six different polarizations, wherein the at least one distributed node comprises the first strong node and In case of transmitting data to the second node in cooperation with the first node in order to increase the degree of freedom gain between the second node, the node must be transmitted from the first node to the second node. Sharing some of the data between the first node and the at least one distributed node and the first node and the at least one A graph of the analysis of the capacity according to distance it goes away when acid node is assumed that the same signal-to-noise ratio (SNR) in a polarized antenna communication method comprising the step of the first transfer to the second base node to the data in cooperation with each other.

Some of the data to be transmitted from the first node to the second node may share the data for the first node and the at least one distributed node to transmit the data at the same time.

The data shared by the first node and the at least one distributed node in cooperation with each other may be simultaneously transmitted to the second node.

In the case of polarized antennas, the maximum degree of freedom gain can be doubled with one effective electromagnetic wave propagation. If there are two valid electromagnetic wave propagation, the degree of freedom gain can be increased by four times. If there are three valid electromagnetic propagation, the degree of freedom gain can be increased six times.

For example, four times the degree of freedom gain is obtained for two valid electromagnetic wave propagation between node nodes, but not two times the degree of freedom gain.

In this case, if the gain is additionally doubled by using the distributed node, the total degree of freedom gain may be 6 times to increase the communication capacity.

In other words, two antenna elements, or two polarization components, can be used to achieve a target of double the degree of freedom gain. In addition, even if the element is used in a distributed node, the gain of the degree of freedom is already increased in the entire system. You do not get any additional benefits. However, the same capacity can be achieved by using a more simplified structure in distributed nodes, minimizing mutual interference between polarized antennas, and using less power than using six elements, thereby minimizing power. .

Claims (9)

A first point node comprising a first polarized antenna using six different polarized waves;
A second base node comprising a second polarization antenna using six different polarizations; And
A distributed node that transmits data to the second node in cooperation with the first node in order to increase the degree of freedom gain between the first node and the second node;
Lt; / RTI >
The six eigenvalues corresponding to the channel between the first node and the second node may include a first eigenvalue, a second eigenvalue, a third eigenvalue, a fourth eigenvalue, a fifth eigenvalue and Including a sixth eigenvalue,
And the distributed node performs polarized antenna communication in cooperation with the first base node to effectively increase the third eigenvalue and the fourth eigenvalue. delete The method of claim 1,
Each of the first node and the second node
Three antennas with different polarizations
Communication system for performing polarized antenna communication comprising a. The method of claim 1,
And wherein the distributed node performs polarized antenna communication to increase the number of propagation paths of valid electromagnetic waves existing between the first node and the second node. The method of claim 1,
And the distributed node performs polarized antenna communication using six different polarizations. The method of claim 1,
The distributed node
A communication system for adaptively performing polarized antenna communication using some of the six different polarizations. A communication system for performing polarized antenna communication
A first node, a second node and at least one distributed node,
The first base node includes a first polarized antenna using six different polarized waves,
The second base node includes a second polarized antenna using six different polarized waves,
When the at least one distributed node transmits data to the second strong node, in cooperation with the first strong node, to increase the degree of freedom gain between the first strong node and the second strong node;
Sharing some of data to be transmitted from the first node to the second node by the first node and the at least one distributed node; And
The first node and the at least one distributed node cooperate with each other to transmit the data to the second node
Lt; / RTI >
The six eigenvalues corresponding to the channel between the first node and the second node may include a first eigenvalue, a second eigenvalue, a third eigenvalue, a fourth eigenvalue, a fifth eigenvalue and Including a sixth eigenvalue,
And the distributed node cooperates with the first base node to effectively increase the third eigenvalue and the fourth eigenvalue. 8. The method of claim 7,
The step of sharing the part of the data to be transmitted from the first node to the second node node between the first node and the at least one distributed node is
Sharing some of the data to be transmitted from the first node to the second node, such that the first node and the at least one distributed node simultaneously transmit data
Polarization antenna communication method comprising a. 8. The method of claim 7,
The first node and the at least one distributed node cooperate with each other to transmit the data to the second node
Simultaneously transmitting the data shared by the first node and the at least one distributed node to the second node;
Polarization antenna communication method comprising a.

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