KR102096607B1 - Wireless communication apparatus and method of setting beamforming path - Google Patents

Abstract

The present invention relates to a wireless communication device and a beamforming path setting method. The disclosed wireless communication device includes a network identification unit for grasping the number of data to be transmitted in a wireless network, and a beamforming transmission path for transmitting the data in batches or presetting the number of data so as to satisfy a predetermined data rate condition. It includes a transmission path setting unit that sequentially sets the number of data according to priority to satisfy the interference amount condition, and a beam forming control unit that forms a beam according to the set beamforming transmission path and configures a data link by the number of data. Accordingly, beam interference is minimized in the entire network as well as in the vicinity of the relay node through the performance of adaptive beamforming, and there is an advantage in that the problems of the prior art that caused the data transmission speed to be reduced due to the beam interference are solved.

Description

Wireless communication device and its beamforming path setting method {WIRELESS COMMUNICATION APPARATUS AND METHOD OF SETTING BEAMFORMING PATH}

The present invention relates to a wireless communication device and a method for setting a beamforming path thereof, and more particularly, a wireless communication device that can be used as a wireless communication node constituting a wireless network sets a beamforming transmission path for a data link. It's about doing.

In the current mobile communication network, since mobile data traffic is exploding due to the generalization of high-performance devices and multimedia services, it is necessary to continuously increase the cell capacity to cope with this. To this end, the mobile communication network is evolving in the direction of a small cell that reduces the size of a cell and densely installs a femto base station.

In such a small cell environment, it is necessary to utilize a wireless backhaul to construct a cost-effective backhaul. However, in wireless, unlike base stations, since signals transmitted and received by multiple base stations are not separated by cables, when multiple base stations simultaneously transmit and receive signals, interference between mutual signals occurs when radio signals overlap each other.

According to the related art, in order to minimize signal interference due to overlapping of radio signals, the width of a beam radiated by a radio signal is reduced through beamforming, and the beam is directed only in a desired direction to separate signals spatially. The overlap between beams was prevented.

However, in a wireless backhaul network using beamforming, a plurality of wireless communication nodes are connected as a kind of mesh network, and a relay node in the middle of the network receives signals from adjacent wireless communication nodes, and other wireless communication This signal is relayed to the nodes. In the above process, the relay node transmits the signal after receiving signals from adjacent wireless communication nodes. When multiple signals are simultaneously transmitted / received, the signal quality may deteriorate due to overlap between beams. The direction of the beam is determined so that interference between beams is minimized.

However, in a wireless backhaul network, data transmitted from a transmitting node arrives at a destination node through several relay nodes, and according to the prior art, beam interference is minimized by considering only an adjacent transmission / reception node without considering the entire path. Since the beam direction is determined as much as possible, the beam interference may still not be minimized in terms of the entire network, which has a problem of lowering the data transmission speed.

Republic of Korea Patent Registration No. 10-1292367, registration date July 26, 2013.

According to an embodiment of the present invention, after determining the number of data requiring beamforming, by setting the entire beamforming transmission path based on the data rate, priority, interference amount, transmission distance, and the like, not only the surrounding nodes but also the entire network Provides a wireless communication device and a beamforming path setting method to minimize beam interference.

The problem to be solved of the present invention is not limited to those mentioned above, and another problem to be solved that is not mentioned will be clearly understood by a person having ordinary knowledge to which the present invention belongs from the following description.

A method of setting a beamforming path of a wireless network in which a plurality of wireless communication nodes are connected in a mesh form according to an aspect of the present invention comprises: determining a number of data to be transmitted in the wireless network, and beamforming to transmit the data A step of collectively setting a transmission path as many as the number of data to satisfy a preset data rate condition or sequentially setting the number of data according to a priority order to satisfy a preset interference amount condition, and the set beamforming transmission path And forming a data link according to the number of data by forming a beam according to the above.

A wireless communication device connected to a plurality of wireless communication nodes in a mesh form according to another aspect of the present invention to configure a wireless network includes: a network identification unit for grasping the number of data to be transmitted in the wireless network, and transmitting the data A transmission path setting unit configured to collectively set the beamforming transmission path for the number of data to satisfy a predetermined data rate condition or sequentially set the number of data according to priority to satisfy a preset interference amount condition; It may include a beamforming control unit to form a beam according to the set beamforming transmission path to configure a data link as many as the number of data.

According to an embodiment of the present invention, after determining the number of data requiring beamforming in a wireless network configured by a plurality of wireless communication nodes, the entire beamforming transmission path is determined based on data rate, priority, interference amount, and transmission distance. Set.

Therefore, by performing adaptive beamforming, beam interference is minimized in the entire network as well as in the vicinity of the relay node, and the problem of the prior art that caused a decrease in data transmission speed due to beam interference is solved.

In addition, if there is a priority according to importance, data having high importance may be transmitted at a high data rate by performing adaptive beamforming by assigning a weight corresponding to the priority.

In addition, when sequentially setting a plurality of beamforming transmission paths based on the priority and the amount of interference, since the complexity increases linearly with the number of nodes, the complexity is set by collectively setting a plurality of beamforming transmission paths. Compared to the case of exponential increase, efficient network operation is possible.

1 is a configuration diagram of a wireless backhaul network that can use a wireless communication device capable of performing a beamforming path setting method according to an embodiment of the present invention as a wireless communication node.
2 is a block diagram of a wireless communication device capable of performing a beamforming path setting method according to an embodiment of the present invention.
FIG. 3 is a detailed block diagram of a transmission path setting unit constituting the wireless communication device illustrated in FIG. 2.
4 is a flowchart illustrating a method of setting a beamforming path according to an embodiment of the present invention.
5 is a flowchart illustrating a method of setting a beamforming path according to another embodiment of the present invention.
6 is an example in which a relay node of a wireless backhaul network sets a beamforming path from a transmitting node to a destination node according to a method for setting a beamforming path according to an embodiment of the present invention.

Advantages and features of the present invention, and methods for achieving them will be clarified with reference to embodiments described below in detail together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and only the embodiments allow the disclosure of the present invention to be complete, and common knowledge in the art to which the present invention pertains It is provided to completely inform the person having the scope of the invention, and the present invention is only defined by the scope of the claims.

In describing embodiments of the present invention, when it is determined that a detailed description of known functions or configurations may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted. In addition, terms to be described later are terms defined in consideration of functions in an embodiment of the present invention, which may vary according to a user's or operator's intention or practice. Therefore, the definition should be made based on the contents throughout this specification.

1 is a configuration diagram of a wireless backhaul network that can use a wireless communication device capable of performing a beamforming path setting method according to an embodiment of the present invention as a wireless communication node.

As shown in this, in the wireless backhaul network according to the embodiment, a plurality of wireless communication nodes are connected like a kind of network, and a wireless link is configured and operated with surrounding wireless communication nodes in coverage.

In FIG. 1, reference numeral 101 is a high frequency beam division multiple access link (high frequency BDMA link), 103 is a low frequency beam division multiple access link (low frequency BDMA link), 105 is a base station (Base Station), 107 is a small cell Base station, 109 is a moving network, 111 is a relay node, 113 is a building, 115 is a nomadic user, and 117 is a moving user And 119 is a cell phone.

As shown in FIG. 1, one small cell base station 107 is an inner cell (eg, a relay node 111, a building 113, a nomadic user 115, etc.) through a high frequency beam splitting multiple access link 101. inner cell) 201. In addition, an outer cell 203 may be formed with the moving user 117 and the mobile communication terminal 119 through the low-frequency beam splitting multiple access link 103.

In the example of the wireless backhaul network shown in FIG. 1, the inner cell 201 is formed through the high frequency beam splitting multiple access link 101, and the outer cell 203 is formed through the low frequency beam splitting multiple access link 103. Although it is shown, since the beamforming is not frequency-dependent, the frequencies may be interchanged. For example, the inner cell 201 may be formed through the low-frequency beam splitting multiple access link 103, and the outer cell 203 may be formed through the high-frequency beam splitting multiple access link 101.

2 is a block diagram of a wireless communication device that can be used as a wireless communication node according to an embodiment of the present invention. The wireless communication device 300 may be used as the relay node 111 of FIG. 1. In addition, the base station 105 of FIG. 1, the small cell base station 107, the relay node 111, the nomadic user 115, the moving user 117, the mobile communication terminal 119, etc. performs the function of the relay node In order to do so, it may include the components shown in FIG.

As shown in this, the wireless communication device 300 according to the embodiment includes an antenna 310, a controller 320 and a memory 330.

Among them, the antenna 310 performs substantial beamforming under the control of the controller 320 to generate a plurality of directional beams.

The controller 320 includes a network identification unit 321, a transmission path setting unit 323, and a beamforming control unit 325.

The network identification unit 321 determines the number of data to be transmitted in the wireless network.

The transmission path setting unit 323 collectively sets the beamforming transmission path for transmitting data as many as the number of data so as to satisfy a preset data rate condition. Alternatively, the beamforming transmission path for transmitting data is sequentially set as many as the number of data according to priority so as to satisfy a preset interference amount condition.

The memory 330 stores beamforming parameters that can be used when the controller 320 controls the beamforming process.

3 is a detailed block diagram of a transmission path setting unit 323 constituting the wireless communication device 300 shown in FIG. 2.

As shown in this, the transmission path setting unit 323 includes a candidate transmission path identification unit 323a, a path transmission rate calculation unit 323b, a beamforming path determination unit 323c, a ranking determination unit 323d, and a priority path determination unit ( 323e), a subordinate path determining unit 323f, and the like.

Among the components of the transmission path setting unit 323, the candidate transmission path determining unit 323a, the path transmission rate calculating unit 323b, the beamforming path determining unit 323c, etc. will be described below with reference to FIG. It is for performing a beamforming path setting method according to an embodiment of the present invention. In addition, the ranking determining unit 323d, the priority path determining unit 323e, the sub-ranking path determining unit 323f, and the like for performing a beamforming path setting method according to another embodiment of the present invention will be described with reference to FIG. will be.

The candidate transmission path determining unit 323a derives a candidate transmission path that can be used as a beamforming transmission path for each data to be transmitted in the network.

The path transfer rate calculator 323b calculates a data transfer rate corresponding to the candidate transfer path.

The beamforming path determining unit 323c determines a beamforming transmission path from among candidate transmission paths such that the sum of the data rates calculated by the path transmission rate calculating unit 323b becomes maximum. For example, the beamforming path determiner 323c may assign a weight for each data to calculate a sum value of data rates.

The ranking determining unit 323d determines priority by data to be transmitted in the network.

The priority path determining unit 323e sets a beamforming transmission path to satisfy a preset data rate condition for data having the highest priority according to the priority determined by the ranking determining unit 323d. For example, the beamforming transmission path may be determined such that data having the highest priority has a maximum data transmission rate.

The subordinate path determining unit 323f sequentially sets the beamforming transmission path to satisfy the interference amount condition with the beamforming transmission path previously set for the data of the lower priority according to the priority determined by the ranking determining unit 323d. For example, the beamforming transmission path may be set such that the data transmission rate is the maximum or the transmission distance is the minimum within a range that satisfies the condition that the amount of interference on the link of the preset data is equal to or less than the preset threshold.

4 is a flowchart illustrating a method of setting a beamforming path according to an embodiment of the present invention.

As shown in this, the beamforming path setting method according to an embodiment includes determining the number of data to be transmitted in the wireless network (S410).

Further, the method further includes deriving a candidate transmission path that can be used as a beamforming transmission path for each data (S420).

Subsequently, the method further includes calculating a data transmission rate corresponding to the candidate transmission path (S430).

In addition, a step of determining a beamforming transmission path among candidate transmission paths is further included such that the sum of the calculated data transmission rates is the maximum (S440). For example, when calculating the sum of the data rates, if there is a priority according to the importance of the data, an adaptive beamforming may be performed by assigning a weight corresponding to the priority for each data.

Here, steps S420 to S440 may be referred to as a step of collectively setting as many as the number of data to satisfy a predetermined data transmission rate condition for beamforming transmission path for transmitting data.

Next, further comprising the step of forming a data link according to the set beamforming transmission path to configure the data link as many as the number of data required for beamforming (S450).

5 is a flowchart illustrating a method of setting a beamforming path according to another embodiment of the present invention.

As shown in this, the beamforming path setting method according to another embodiment includes determining the number of data to be transmitted in the wireless network (S510).

And, it further comprises the step of determining the priority for each data (S520).

In addition, the step of setting a beamforming transmission path to satisfy a predetermined data rate condition for data having the highest priority (S530) is further included.

Next, further comprising the step of sequentially setting the beamforming transmission path to satisfy the interference amount condition with the beamforming transmission path previously set for the data of the next priority according to the priority (S540).

Here, steps S520 and S540 may be referred to as a step of sequentially setting the number of data according to priority so as to satisfy a predetermined interference amount condition for a beamforming transmission path for transmitting data.

Next, further comprising the step of forming a data link according to the set beamforming transmission path to configure the data link as many as the required number of data links (S550).

FIG. 6 shows a beamforming path (B1, B2) from a transmitting node (S1, S2) to a destination node (D1, D2) by a relay node (R) of a wireless backhaul network according to a beamforming path setting method according to an embodiment of the present invention. , B3, B4). The wireless data may be directly transmitted from the transmitting nodes S1 and S2 to adjacent destination nodes D1 and D2, or may be transmitted through the relay node R. In addition, when it is delivered through the relay node R, it is transmitted to the destination nodes D1 and D2 in a multi-hop manner, not through one relay node R but through several relay nodes R. You can. At this time, the beam direction and path should be set so that the final data rate (end-to-end rate) transmitted through the corresponding data link is maximized.

Hereinafter, a process of setting a beamforming path for data transmission by a wireless communication device that can be used as a wireless communication node of a wireless communication network such as a wireless backhaul network will be described.

<First Example>

The beamforming path setting process according to an embodiment of the present invention will be described with reference to FIGS. 2 to 4 and 6.

First, the network identification unit 321 of the controller 320 constituting the wireless communication device 300 determines the number of data to be transmitted in the wireless network (S410).

Then, the transmission path setting unit 323 of the controller 320 collectively sets the beamforming transmission path for transmitting data to the number of data so as to satisfy a preset data rate condition.

Looking more closely at the process of setting the beamforming transmission path by the transmission path setting unit 323, the candidate transmission path determining unit 323a of the transmission path setting unit 323 transmits beamforming for each data to be transmitted in the wireless network. A candidate transmission path that can be used as a path is derived (S420).

Subsequently, the path transmission rate calculating unit 323b of the transmission path setting unit 323 calculates a data transmission rate corresponding to the candidate transmission path (S430).

Thereafter, the beamforming path determining unit 323c of the transmission path setting unit 323 determines the beamforming transmission path among the candidate transmission paths so that the sum of the data rates calculated by the path transmission rate calculating unit 323b becomes maximum. (S440).

Next, the beamforming control unit 325 of the controller 320 forms a beam according to the beamforming transmission path set by the transmission path setting unit 323. That is, the beamforming control unit 325 controls the antenna 310 according to the beamforming parameter previously stored in the memory 330, and the antenna 310 forms a beam under the control of the beamforming control unit 325 to perform beamforming. The data link is configured as many as necessary data (S450).

The beamforming process according to an embodiment of the present invention will be described with reference to FIG. 6. Data (x1, x2) transmitted from each transmitting node (S1, S2) is transmitted to each destination through a relay node (R). It is transmitted to the nodes D1 and D2. The data x1 transmitted from the transmitting node S1 is transmitted to the destination node D1 via the beamforming paths B1 and B2, and the data x2 transmitted from the transmitting node S2 transmits the beamforming paths B3 and B4. It passes through to the destination node D2. Here, the channel conditions of each path may be shared between relay nodes R, and may be shared by an upper controller (not shown) above each node or by wireless communication nodes exchanging information.

As such, when the beamforming control unit 325 controls the antenna 310 to form an initial beam, multiple beamforming paths B1, B2, B3, and B4 are formed in the direction of an adjacent node without considering interference between beams. . At this time, the beamforming may be digital beamforming performed in a base band or analog beamforming performed in the antenna 310.

For example, the controller 320 may adjust the beam direction so that the value of the objective function shown in Equation 1 below is the maximum in order to maximize the sum rate of data x1 and x2. . Here, Equation 1 is a data transmission rate when the relay node R uses a decoded and forward relay (DF relay). If, when the controller 320 uses a relaying method of another method, for example, amplify and forward (AF), the objective function of Equation 1 is set so that the sum of transmission rates when using the corresponding relaying method is maximized. Can be modified. In addition, the following Equation 2 and Equation 3 derived based on Equation 1 may also be modified.

과

는 각각 데이터 x1과 x2의 데이터 전송률을 나타내며,

는 해당 빔(

)을 통해 통신되는 데이터의 전송률을 나타낸다. 각 데이터의 전송률은 해당 데이터가 전송되는 각 경로 전송률의 최소 값이며, 각 경로에서의 전송률(

)은 아래의 수학식 2와 같다.In Equation 1 above

and

Denotes data rates of data x1 and x2, respectively,

Corresponding beam (

). The transmission rate of each data is the minimum value of the transmission rate of each path through which the data is transmitted, and the transmission rate (

) Is as shown in Equation 2 below.

은

경로의 채널 세기이다. 여기서, 채널 세기에는 무선 채널의 세기뿐만 아니라 해당 경로를 구성하는 송/수신 노드의 안테나 이득(antenna gain)도 포함된다. 또한, N은 백색 잡음(AWGN: Additive white Gaussian noise),

는

경로에서 다른 빔으로부터 받는 간섭의 양이다.In Equation 2 above, W is a bandwidth and P is a transmission power of each transmitting node S1 and S2,

silver

The channel strength of the path. Here, the channel strength includes not only the radio channel strength, but also the antenna gain of the transmit / receive node constituting the corresponding path. In addition, N is white noise (AWGN: Additive white Gaussian noise),

The

This is the amount of interference received from other beams in the path.

의 값이 커지게 되므로, 해당 경로에서의 전송률이 올라갈 수 있지만, 해당 빔 방향이 다른 경로에 인접하게 된다면, 다른 경로에서의 전송률이 저하될 수 있고, 자신도 다른 빔으로부터 간섭을 많이 받게 될 수 있다. 그러므로, 전송 경로 설정부(323)는 네트워크 전체 전송률을 고려하여 수학식 1이 최대가 되도록 빔 방향을 설정하는 것이다.Therefore, when an accurate beam is formed at an adjacent node at the relay node R,

Since the value of increases, the transmission rate in the corresponding path may increase, but if the corresponding beam direction is adjacent to another path, the transmission rate in the other path may deteriorate, and oneself may also receive a lot of interference from another beam. have. Therefore, the transmission path setting unit 323 sets the beam direction so that Equation 1 becomes the maximum in consideration of the entire network transmission rate.

On the other hand, when calculating the sum of the data rates, the transmission path setting unit 323 performs adaptive beamforming by assigning a weight corresponding to the priority to each data if there is a priority according to the importance of the data. You can. That is, the objective function of Equation 1 is modified as shown in Equation 3 below to give priority through weights α and β.

<Second Example>

The beamforming path setting process according to another embodiment of the present invention will be described with reference to FIGS. 2, 3, 5, and 6.

As in the first embodiment described above, since the maximum value of the objective function of Equation 1 or Equation 3 must consider all beam directions at each relay node R, the computational complexity of the entire network is exponentially multiplied. Can increase. Accordingly, the transmission path setting unit 323 may determine the priority of data to be transmitted and sequentially configure the data link according to the priority.

First, the network identification unit 321 of the controller 320 constituting the wireless communication device 300 determines the number of data to be transmitted in the wireless network (S510).

Then, the transmission path setting unit 323 of the controller 320 sequentially sets the beamforming transmission path for transmitting data according to the priority in order to satisfy the preset interference amount condition.

Looking at the process of setting the beamforming transmission path by the transmission path setting unit 323 in more detail, the ranking determining unit 323d determines the priority for each data to be transmitted in the network. For example, priority may be determined according to the importance of data (S520).

Then, the priority path determining unit 323e sets the beamforming transmission path to satisfy a preset data rate condition for data having the highest priority according to the priority determined by the ranking determining unit 323d. For example, the beamforming transmission path may be determined such that data having the highest priority has a maximum data transmission rate. (S530).

Subsequently, the subordinate path determining unit 323f sequentially sets the beamforming transmission path so as to satisfy the interference amount condition with the beamforming transmission path previously set for the data of the lower priority according to the priority determined by the ranking determining unit 323d. do. For example, the beamforming transmission path may be set such that the data transmission rate is the maximum or the transmission distance is the minimum within a range that satisfies the condition that the amount of interference on the link of the preset data is equal to or less than the preset threshold. For example, a beamforming transmission path may be set such that data having a critical delay is a minimum transmission distance, and a beamforming transmission path may be configured such that data having a significant data transmission rate has a maximum data transmission rate.

Thus, until all data links are established, the process of setting the beamforming transmission path by the subordinate path determining unit 323f is repeatedly performed, and the antenna 310 forms a beam under the control of the beamforming control unit 325. By configuring the data link as many as the number of data beamforming is required (S550).

The beamforming process according to another embodiment of the present invention will be described with reference to FIG. 6. Data x1 that passes through the relay node R is transmitted from the transmitting node S1 and then passes through the relay node R to the destination node. (D1). At this time, the first high-priority data does not consider the amount of interference, and determines the beamforming transmission path so that the data rate is maximum.

And, from the second priority, the beamforming transmission path in consideration of the transmission distance or data transmission rate within a range that satisfies the condition that the amount of interference on the beam for the data link previously formed is less than or equal to a certain threshold. Decide. For example, the threshold of the amount of interference can be adjusted by a network management server or the like.

As described above, when the beamforming transmission path is sequentially set according to the priority to form the beam direction, the complexity of the system increases linearly with the number of nodes. Therefore, it is possible to operate the network more efficiently when comparing the complexity of exponentially increasing with the number of nodes when setting the beamforming path in a batch.

As described so far, according to the embodiment, after grasping the number of data to be transmitted in a wireless network constituted by a plurality of wireless communication nodes, the entire beamforming transmission path is determined based on data rate, priority, interference amount, and transmission distance. Set.

Therefore, through the adaptive beamforming, beam interference is minimized not only in the periphery of the relay node but also in the entire network, and the problem of the prior art that caused the data transmission speed to be reduced due to the beam interference is solved.

In addition, if there is a priority according to importance, data having high importance may be transmitted at a high data rate by performing adaptive beamforming by assigning a weight corresponding to the priority.

In addition, when sequentially setting a plurality of beamforming transmission paths based on the priority and the amount of interference, since the complexity increases linearly with the number of nodes, the complexity is set by collectively setting a plurality of beamforming transmission paths. Efficient network operation is possible when compared to the case where is exponentially increased.

Combinations of each block in the block diagrams and respective steps in the flow diagrams attached to the present invention may be performed by computer program instructions. These computer program instructions may be mounted on a processor of a general purpose computer, special purpose computer, or other programmable data processing equipment, so that instructions executed through a processor of a computer or other programmable data processing equipment may be used in each block or flowchart of the block diagram. In each step, means are created to perform the functions described. These computer program instructions can also be stored in computer readable or computer readable memory that can be oriented to a computer or other programmable data processing equipment to implement a function in a particular way, so that computer readable or computer readable memory The instructions stored in it are also possible to produce an article of manufacture containing instructions means for performing the functions described in each step of each block or flowchart of the block diagram. Since computer program instructions may be mounted on a computer or other programmable data processing equipment, a series of operational steps are performed on the computer or other programmable data processing equipment to create a process that is executed by the computer to generate a computer or other programmable data. It is also possible for instructions to perform processing equipment to provide steps for executing the functions described in each block of the block diagram and in each step of the flowchart.

Further, each block or each step may represent a module, segment, or portion of code that includes one or more executable instructions for executing the specified logical function (s). It should also be noted that in some alternative embodiments it is also possible that the functions mentioned in blocks or steps occur out of order. For example, two blocks or steps shown in succession may in fact be executed substantially simultaneously, or it is also possible that the blocks or steps are sometimes performed in reverse order depending on the corresponding function.

The above description is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may make various modifications and variations without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are not intended to limit the technical spirit of the present invention, but to explain, and the scope of the technical spirit of the present invention is not limited by these embodiments. The scope of protection of the present invention should be interpreted by the following claims, and all technical thoughts within the equivalent range should be interpreted as being included in the scope of the present invention.

According to an embodiment of the present invention, beam interference is minimized not only in the periphery of a relay node but also in the entire network through adaptive beamforming in consideration of a path through which data is transmitted, resulting in a decrease in data transmission speed due to beam interference Does not work.

The wireless communication device and the beamforming path setting method according to the embodiment of the present invention can be used when configuring and operating a wireless backhaul network. Also, it can be used to configure and operate a general wireless communication network, such as a wireless network between a base station and a mobile communication terminal, and a Wi-Fi communication network between wireless communication nodes.

300: wireless communication device 310: antenna
320: controller 321: network identification unit
323: transmission path setting unit 323a: candidate transmission path identification unit
323b: Path transmission rate calculation unit 323c: Beamforming path determination unit
323d: ranking determining unit 323e: senior path determining unit
323f: Subordinate route determination unit 325: Beamforming control unit
330: memory

Claims (10)

A method of setting a beamforming path of a wireless network in which a plurality of wireless communication nodes are connected in a mesh form,
Determining the number of data to be transmitted in the wireless network,
Setting the beamforming transmission path for transmitting the data in batches as many as the number of data to satisfy a preset data rate condition or sequentially setting the number of data according to a priority order to satisfy a preset interference amount condition Wow,
And forming a data link as many as the number of data by forming a beam according to the set beamforming transmission path. According to claim 1,
The setting step includes deriving a candidate transmission path that can be used as the beamforming transmission path for each data,
Calculating a data transmission rate corresponding to the candidate transmission path,
And determining the beamforming transmission path from among the candidate transmission paths so that the calculated sum of the data transmission rates becomes the maximum. According to claim 2,
In the determining, the beamforming path setting method is characterized in that the sum is calculated by weighting each data. According to claim 1,
The setting step may include determining a priority for each data,
Setting the beamforming transmission path to satisfy a predetermined data rate condition for the highest priority data;
And sequentially setting the beamforming transmission path to satisfy the interference amount condition with a beamforming transmission path previously set for data of a lower priority according to the priority. The method of claim 4,
In the step of sequentially setting the beamforming transmission path, the beamforming path setting is characterized in that the data transmission rate is set to a maximum or a transmission distance is minimum within a range that satisfies the interference amount condition. Way. A wireless communication device configured to form a wireless network by being connected to a plurality of wireless communication nodes in a mesh form,
A network identification unit for determining the number of data to be transmitted in the wireless network;
A transmission in which the beamforming transmission path for transmitting the data is collectively set as many as the number of data to satisfy a preset data rate condition, or sequentially set as many as the number of data according to a priority so as to satisfy a preset interference amount condition. Path setting unit,
And a beamforming control unit configured to form a data link by the number of data by forming a beam according to the set beamforming transmission path. The method of claim 6,
The transmission path setting unit includes a candidate transmission path identification unit for deriving a candidate transmission path that can be used as the beamforming transmission path for each data,
A path transfer rate calculator for calculating a data transfer rate corresponding to the candidate transfer path,
And a beamforming path determiner for determining the beamforming transmission path among the candidate transmission paths so that the calculated sum of the data transmission rates becomes maximum. The method of claim 7,
The beamforming path determining unit calculates the sum value by assigning a weight for each data. The method of claim 6,
The transmission path setting unit, a priority determining unit for determining the priority for each data,
A priority path determining unit configured to set the beamforming transmission path to satisfy a predetermined data rate condition for the data having the highest priority,
And a subordinate path determining unit sequentially setting the beamforming transmission path to satisfy the interference amount condition and the data rate condition with the beamforming transmission path previously set for the data of the next priority according to the priority. Wireless communication device. The method of claim 9,
The sub-priority path determining unit, the wireless communication device characterized in that to set the beamforming transmission path so that the data transmission rate is the maximum or the transmission distance is the minimum within a range that satisfies the interference amount condition.

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