WO2013069856A1 - Digital signal processing device, signal processing system, and signal processing method - Google Patents

Abstract

Disclosed are a digital signal processing device, a signal processing system, and a signal processing method. The digital signal processing device of the system is connected to a core system and processes wireless digital signals. A plurality of wireless signal processing devices are physically separated from the digital signal processing device, convert and amplify digital signals received from the digital signal processing device, transmit the amplified signals to a terminal based on multi-antenna technology using two antennas, receives the signals transmitted from the terminal based on the multi-antenna technology using two antennas, and transfers the received signals to the digital signal processing device. Two wireless signal processing devices among the plurality of wireless signal processing devices transmit the same data signal to the terminal located at a boundary region between the two wireless signal processing devices according to the control of the digital signal processing device and transmit the same data signal through the antennas having different transmission patterns.

Description

Digital signal processing device, signal processing system and signal processing method

The present invention relates to a digital signal processing apparatus, a signal processing system and a signal processing method.

In general, a communication base station includes a digital signal processor and a wireless signal processor together in one physical system. However, such a system has a limitation in optimizing a cell design because a base station including all processing units must be installed in a cell. In order to improve this, a plurality of antennas may be connected to one base station to form a cell in a required manner, thereby reducing a coverage hole.

This approach, however, allowed efficient cell design, but it was difficult to maximize system capacity. Therefore, there is a need for a new structure and transmission method of a base station to maximize wireless capacity.

It is an object of the present invention to provide a digital signal processing apparatus, a signal processing system, and a signal processing method capable of maximizing diversity effect and maximizing performance in a boundary area.

Signal processing system according to an aspect of the present invention,

A digital signal processing device connected to the core system and processing a wireless digital signal; And physically separated from the digital signal processing apparatus, converts and amplifies the digital signal received from the digital signal processing apparatus, and transmits the amplified signal to the terminal based on a multi-antenna technique using two antennas. A plurality of wireless signal processing apparatuses for receiving a signal transmitted from a terminal and transmitting the received signal from the terminal to the digital signal processing apparatus based on a multi-antenna technique using two antennas, and two wireless signal processing apparatuses among the plurality of wireless signal processing apparatuses According to the control of the digital signal processing device transmits the same data signal to the terminal located in the boundary area between the two wireless signal processing device, but transmits the same data signal through each antenna having a different transmission pattern It is done.

Here, the two radio signal processing apparatuses each transmit a data signal to the terminal using one of two antennas.

In addition, when any one of the traffic load of the two radio signal processing apparatus is greater than the load threshold value, the two radio signal processing apparatus transmits a data signal to the terminal.

The two wireless signal processing apparatuses may transmit uplink signal strength values received from the terminal to the digital signal processing apparatus, and the digital signal processing apparatuses may transmit signal strength values transmitted from the two wireless signal processing apparatuses. Based on the determination of the location of the terminal within the border area.

The digital signal processing apparatus may determine that the terminal is located in the boundary area when the difference between the signal strength values transmitted from the two wireless signal processing apparatuses is less than or equal to a threshold value, and thus, the two wireless signal processing apparatuses may be used. The antennas having different transmission patterns are controlled to transmit the same data to the terminal.

In addition, the digital signal processing apparatus controls the wireless signal processing apparatus having a larger signal strength value to transmit data to the terminal when a difference between signal strength values transmitted from the two wireless signal processing apparatuses is greater than a threshold value. .

In addition, the digital signal processing apparatus, when both traffic loads of the two wireless signal processing apparatus is less than the load threshold value, the two wireless signal processing apparatus transmits the data signal to the terminal by using both antennas It is characterized by.

The digital signal processing apparatus allocates the same channel to the two wireless signal processing apparatuses.

Digital signal processing apparatus according to another aspect of the present invention

Physically separated from a plurality of wireless signal processing devices installed in a service area and processing wireless signals, wherein the plurality of wireless signal processing devices, wherein the plurality of wireless signal processing devices are based on a multi-antenna technology using two antennas. A digital signal processing apparatus for processing a radio signal from a terminal for transmitting and receiving a signal, the apparatus comprising: uplink signals received from a terminal by two radio signal processing apparatuses from two of the plurality of radio signal processing apparatuses; A receiver which receives a signal strength value and collects a traffic load of each of the two radio signal processing apparatuses; On the basis of the difference in the signal strength value received through the receiver, it is determined whether the terminal is located within the boundary area between the two radio signal processing apparatuses and at the same time loads any one of the traffic loads of the two radio signal processing apparatuses. Determination unit for determining whether greater than the threshold value; And when the terminal is determined to be located within a boundary area between the two radio signal processing apparatuses and any one of the traffic loads of the two radio signal processing apparatuses is greater than the load threshold value, And a processor configured to control the two radio signal processing apparatuses to transmit the same data signal to the terminal located in the border region, but to transmit the same data signal through each one antenna having a different transmission pattern.

Here, the determination unit determines that the terminal is located within a boundary area between the two radio signal processing apparatuses when the difference between the signal strength values received through the receiver is less than or equal to a threshold.

In addition, the plurality of wireless signal processing apparatus may be a resource according to an orthogonal frequency division multiplexing (hereinafter referred to as "OFDM") or a resource according to a wideband code division multiple access (WCDMA) scheme. By using the data signal is transmitted to the terminal.

Signal processing method according to another aspect of the present invention,

A plurality of wireless signal processing devices for processing a wireless signal by installing a digital signal processing device for processing a wireless digital signal, wherein the plurality of wireless signal processing device is based on a multi-antenna technology using two antennas A method of processing a signal from transmitting and receiving a signal, the method comprising: a boundary between the two wireless signal processing apparatuses of the terminal based on signal strength values received from two wireless signal processing apparatuses of the plurality of wireless signal processing apparatuses; Determining whether one of the traffic loads of the two radio signal processing apparatuses is greater than a load threshold; And the terminal located in the boundary area when the terminal is located in the boundary area between the two radio signal processing apparatuses and any one of the traffic loads of the two radio signal processing apparatuses is greater than the load threshold value. And controlling the two radio signal processing apparatuses to transmit the same data signal through each one antenna having different transmission patterns.

The determining may include receiving uplink signal strength values received by the two wireless signal processing apparatuses from a terminal from two wireless signal processing apparatuses of the plurality of wireless signal processing apparatuses, and the two wireless signals. Collecting each traffic load of the processing device; And when the difference between the received signal strength values is equal to or less than a threshold value, determines that the terminal is located within a boundary area between the two wireless signal processing apparatuses, and any one of the traffic loads of the two wireless signal processing apparatuses is determined. Determining whether greater than the load threshold.

Signal processing method according to another aspect of the present invention,

A wireless signal processing device installed in a service area for processing a wireless signal, wherein the wireless signal processing device transmits and receives a signal to and from a terminal based on a multi-antenna technology using two antennas. Transmitting a signal strength value received from a terminal to a digital signal processing apparatus; And a transmission pattern different from one antenna to which the neighboring wireless signal processing device transmits a signal to the terminal under the control of the digital signal processing device, while transmitting the same data signal as the neighboring wireless signal processing device to the terminal. The method includes transmitting a data signal to the terminal through one antenna.

Here, the digital signal processing apparatus is connected to a plurality of wireless signal processing, is physically separated from the plurality of wireless signal processing apparatus, and digitally processes the wireless signal from the wireless signal processing apparatus and delivers it to the core system. .

In addition, the step of transmitting the data signal to the terminal, the terminal is located in the boundary area between the radio signal processing device and the neighboring radio signal processing device, any one of the traffic load of the two radio signal processing devices Even if it is determined that it is larger than the load threshold value.

In the case where the boundary area is located, it is determined when the difference between the signal strength value of the wireless signal processing device and the signal strength value of the neighboring wireless signal processing device is equal to or less than a threshold value.

According to the present invention, two adjacent radio signal processing apparatuses may transmit the same data to a terminal by using one antenna having a different transmission pattern, thereby maximizing diversity effect and maximizing performance in a boundary area.

1 is a schematic diagram of a network according to an embodiment of the present invention.

2 is a schematic structural diagram of a cell according to an embodiment of the present invention.

3 is a diagram illustrating an example of a signal transmitted by a wireless signal processing apparatus according to an embodiment of the present invention.

4 is a diagram illustrating another example of a signal transmitted by a wireless signal processing apparatus according to an embodiment of the present invention.

FIG. 5 is a diagram illustrating an example of a signal transmitted by a plurality of wireless signal processing apparatuses included in a cell in a general network.

6 is a diagram illustrating an example of a signal transmitted by a plurality of wireless signal processing apparatus according to an embodiment of the present invention.

FIG. 7 is a diagram illustrating an example in which a plurality of wireless signal processing apparatuses transmit a signal when all traffic loads are light.

8 is a block diagram of a digital signal processing apparatus according to an embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise. In addition, the terms “… unit”, “… unit”, “module”, etc. described in the specification mean a unit that processes at least one function or operation, which may be implemented by hardware or software or a combination of hardware and software. have.

In the present specification, a terminal is a mobile station (MS), a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS), a user equipment (User Equipment). It may also refer to a user equipment (UE), an access terminal (AT), and the like, and may include all or some functions of a terminal, a mobile terminal, a subscriber station, a portable subscriber station, a user device, an access terminal, and the like.

In the present specification, a base station (BS) includes an access point (AP), a radio access station (RAS), a node B (Node B), an advanced node B (evolved NodeB, eNodeB), transmission and reception It may also refer to a base transceiver station (BTS), a mobile multihop relay (MMR) -BS, and the like. It may also include.

A signal processing system according to an embodiment of the present invention will now be described in detail with reference to the drawings.

1 is a schematic diagram of a network according to an embodiment of the present invention.

Referring to FIG. 1, a network according to an embodiment of the present invention includes a radio signal processing unit (RU) 100, a digital signal processing unit (DU) 200, and a core system 300. do. The wireless signal processing apparatus 100 and the digital signal processing apparatus 200 constitute a signal processing system of wireless communication.

The wireless signal processing apparatus 100 converts and amplifies a digital signal received from the digital signal processing apparatus 200 into a radio frequency (RF) signal according to a frequency band as a part of processing a wireless signal. The wireless signal processing apparatus 100 is connected to a plurality of digital signal processing apparatus 200 (110, 120, 130), each of the wireless signal processing apparatus 100 is installed in the service target area, that is, the cell. The wireless signal processing apparatus 100 and the digital signal processing apparatus 200 may be connected by an optical cable.

The digital signal processing apparatus 200 performs a process of encrypting and decrypting a wireless digital signal, and is connected to the core system 300. Unlike the wireless signal processing apparatus 100, the digital signal processing apparatus 200 is a server that is not installed in a service target area but mainly installed in a centralized communication station, and is a virtualized base station. The digital signal processing apparatus 200 transmits and receives signals with the plurality of wireless signal processing apparatuses 100.

The existing communication base station includes a processing unit corresponding to each of the wireless signal processing apparatus 100 and the digital signal processing apparatus 200 in one physical system, and one physical system is installed in a service target area. In contrast, the system according to the embodiment of the present invention physically separates the wireless signal processing apparatus 100 and the digital signal processing apparatus 200, and only the wireless signal processing apparatus 100 is installed in the service area.

The core system 300 processes a connection between the digital signal processing apparatus 200 and an external network, and includes a switch (not shown).

Referring now to Figure 2 will be described in detail with respect to the cell structure according to an embodiment of the present invention.

2 is a schematic structural diagram of a cell according to an embodiment of the present invention.

Referring to FIG. 2, the cells 10, 20, and 30 according to the embodiment of the present invention each include a plurality of wireless signal processing apparatuses 100. The radio signal processing apparatus 100 includes macro radio signal processing apparatuses (macro RUs) 111 and 121 (macro RUs) and a plurality of cooperative RUs 112, 113, 114, 115, 116, and 117. , 122, 123, 124, 125, 126, and 127.

The macro radio signal processing apparatuses 111 and 121 manage main communication processing of the cells 10 and 20, and transmit signals to all terminals in the cells 10 and 20 with high power. The cooperative radio signal processing apparatuses 112-117 and 122-127 transmit a signal to a terminal in the vicinity of the terminal with a smaller output power than that of the macro radio signal processing apparatuses 111 and 121.

One cell 10 includes at least one macro radio signal processing device 111 and a plurality of cooperative radio signal processing devices 112-117. All of the wireless signal processing apparatuses 100 included in the plurality of cells 10, 20, and 30 are controlled by the digital signal processing apparatus 200.

On the other hand, the wireless signal transmitted by the wireless signal processing device 100 to the terminal is a control signal (control signal) that informs the basic system information and data channel assignment information (data signal) for transmitting user data (data signal) and channel estimation, etc. It includes a reference signal for (reference signal).

The plurality of cooperative radio signal processing apparatuses 112-117 included in one cell 10 transmit the same control signal and reference signal as the macro radio signal processing apparatus 111 included in the same cell 10.

In addition, the wireless signal processing apparatus 100 included in different cells 10, 20, and 30 transmits different control signals and reference signals. For example, the reference signal transmitted by the radio signal processing apparatuses 111-117 included in the cell 10 and the reference signal transmitted by the radio signal processing apparatuses 121-127 included in the cell 20 are different from each other. .

In this way, by providing the plurality of cooperative radio signal processing apparatuses 112-117 as well as the macro radio signal processing apparatuses 111 and 121 in one cell, the terminal can efficiently control the control signals and the reference signals that are commonly transmitted in the cell. Can be received.

On the other hand, the wireless signal processing apparatus (111-117, 121-127) according to an embodiment of the present invention uses two antennas to support the 2x2 Multiple Input Multiple Output (MIMO). In this case, the patterns of the reference signals used for the two antennas of the wireless signal processing apparatuses 111-117 and 121-127 should be different from each other. For example, the first antenna set to '0' among two antennas of the wireless signal processing device 111 uses the reference signal _Ro as shown in FIG. 3, and is set to '1' among two antennas. The second antenna may use the reference signal R ₁ as shown in FIG. 4. Since the antennas of the wireless signal processing apparatuses 111 to 117 included in the same cell 10 use the same reference signals, the first antennas of the respective antennas of the wireless signal processing apparatuses 111 to 117 are referred to. The signal _Ro is used, and all the second antennas use the reference signal R ₁ . In this case, the reference signals R ₀ and R ₁ may use resources according to orthogonal frequency division multiplexing (hereinafter, referred to as “OFDM”) as shown in FIGS. 3 and 4.

Meanwhile, the radio signal processing apparatuses 111-117 included in one cell 10 may selectively transmit data signals using the same or different channels, respectively, and the cooperative radio signal processing apparatuses 112-117. Transmits a data signal using the same channel used by the macro radio signal processing apparatus 111.

Hereinafter, an example in which a plurality of wireless signal processing devices 111-117 included in a cell in a general network transmits signals to terminals located in a boundary area of the wireless signal processing devices 111-117 will be described.

FIG. 5 is a diagram illustrating an example of a signal transmitted by a plurality of wireless signal processing apparatuses included in a cell in a general network.

Referring to FIG. 5, the wireless signal processing apparatuses 111 and 112 are adjacent to each other in the cell 10, and thus, the area 11 of the wireless signal processing apparatus 111 and the wireless signal processing apparatus 112 are separated from each other. The regions 12 overlap one another, resulting in their boundary regions 13. In order to support the terminals 410 and 420 in the boundary area 13, one wireless signal processing apparatus 111 supports one terminal 410, and one wireless signal processing apparatus 112 includes one The terminal 420 will be supported. In this case, the wireless signal processing apparatuses 111 and 112 and the terminals 410 and 420 have two antennas, respectively, to support the 2x2 multiple antenna technology. Accordingly, both the first and second antennas 1111 and 1112 of the wireless signal processing apparatus 111 transmit the same signal to the terminal 410 as signals having different transmission patterns, that is, signals having different reference signals. The first antenna 1121 and the second antenna 1122 of the wireless signal processing apparatus 112 both transmit the same signal to the terminal 420 as signals having different transmission patterns. In this case, the wireless signal processing apparatuses 111 and 112 transmit signals using different channel resources to prevent interference of signals transmitted to the terminals 410 and 420 in the boundary area 13. As shown in FIG. 5, the wireless signal processing apparatus 111 transmits a signal using channel A, and the wireless signal processing apparatus 112 transmits a signal using channel B.

However, according to the general network described above, efficient cell design is possible, but it is difficult to maximize system capacity.

Therefore, the following describes an embodiment of the present invention for maximizing wireless capacity.

6 is a diagram illustrating an example of a signal transmitted by a plurality of wireless signal processing apparatus included in a cell according to an embodiment of the present invention.

Before the description, the radio signal processing apparatuses 111 and 112 according to an embodiment of the present invention have two antennas to support the 2x2 multi-antenna technique, and the two antennas each have signals of different transmission patterns for the same data. To transmit. That is, it is assumed that the first antenna (denoted by 0) transmits as a signal of the first transmission pattern and the second antenna (denoted by 1) is transmitted as the signal of the second transmission pattern.

Referring to FIG. 6, the wireless signal processing apparatuses 111 and 112 included in the cell 1 11 and the cell 2 12 basically transmit data signals to a terminal close to the cell. However, the terminals 410 and 420 are in the boundary area 13 which can receive signals from the two radio signal processing devices 111 and 112, and the traffic load of any of the radio signal processing devices 111 and 112 is increased. When the traffic load is high, the two wireless signal processing apparatuses 111 and 112 transmit the same data signal to the terminals 410 and 420, respectively.

For example, the wireless signal processing apparatuses 111 and 112 transmitting the data signal to the terminal 410 transmit the same data using the A channel, and the wireless signal processing apparatus transmitting the data signal to the terminal 420 ( 111 and 112 transmit the same data using the B channel. In this case, when two wireless signal processing apparatuses 111 and 112 transmit the same data through the same channel A to one terminal 410, the two wireless signal processing apparatuses 111 and 112 each have one Transmit data using only the antenna. In particular, the two wireless signal processing apparatuses 111 and 112 transmit the same data to the terminal 410 through one antenna having different transmission patterns. For example, when the wireless signal processing apparatus 111 transmits data based on the first transmission pattern to the terminal 410 through the first antenna 1111 transmitting in the first transmission pattern, the wireless signal processing apparatus 112. Transmits data based on the second transmission pattern to the terminal 410 through the second antenna 1122 transmitting the second transmission pattern. In other words, the first antenna 1111 of the wireless signal processing device 111 and the second antenna 1122 of the wireless signal processing device 112 transmit the same data in a pattern between each other through the same channel A. To send). If the wireless signal processing apparatus 111 transmits data to the second antenna 1112, the wireless signal processing apparatus 112 transmits data to the first antenna 1121.

Similarly, the terminal 420 transmits data based on the second transmission pattern to the terminal 420 through the second antenna 1112 transmitted by the wireless signal processing apparatus 111 in the second transmission pattern, and performs wireless signal processing. The device 112 transmits data based on the first transmission pattern to the terminal 420 through the first antenna 1121 transmitting the first transmission pattern. However, what is different from the terminal 410 is that the wireless signal processing apparatuses 111 and 112 transmit data to the terminal 420 using the channel B. That is, the second antenna 1112 of the wireless signal processing device 111 and the first antenna 1121 of the wireless signal processing device 112 transmit the same data of different patterns to each other through the same channel B. To send.

Then, the terminals 410 and 420 recognize the signals of the two paths respectively received as multipath signals and combine and recover the signals.

As such, when the two wireless signal processing apparatuses 111 and 112 transmit the same data to the terminals 410 and 420 through only one antenna, respectively, in different transmission patterns, the terminals 410 and 420 in the boundary area 13 are provided. Maximizing the diversity effect to improve the quality of the data signal received by the terminals 410 and 420, and at the same time, the terminal 410 in the boundary region 13 in the wireless signal processing apparatus 111 and 112 with high traffic load. 420, power for transmitting data can be reduced. In this case, the data signals transmitted by the wireless signal processing apparatuses 111 and 112 may use resources according to orthogonal frequency division multiplexing (hereinafter, referred to as "OFDM") or wideband code division multiple access. resources according to the access (WCDMA) scheme can be used.

Now, a description will be given of a method of determining whether two wireless signal processing apparatuses 111 and 112 transmit the same data to one terminal 410 through antennas having different patterns.

First, each of the two wireless signal processing apparatuses 111 and 112 measures the signal strength of the uplink received from the terminal 410 and transmits it to the digital signal processing apparatus 200. Then, the digital signal processing apparatus 200 may determine the terminal 410 based on the signal strength value Sa received from the wireless signal processing apparatus 111 and the signal strength value Sb received from the wireless signal processing apparatus 112. Evaluate uplink quality. That is, when the difference between the signal strength value Sa and the signal strength value Sb is equal to or less than the threshold value Sth as shown in Equation 1, the terminal 410 is the same from the two wireless signal processing devices 111 and 112. It may be determined that the boundary area 13 has a benefit to receive data.

[Equation 1]

| Sa-Sb | ≤Sth

If the difference between the signal strength value Sa and the signal strength value Sb is greater than the threshold value Sth, it is determined that the terminal 410 is in an area other than the boundary area 13 and the terminal 410 is located. Only the wireless signal processing apparatus corresponding to the region, that is, the signal strength value is large, transmits data to the terminal 410.

In this case, the threshold value Sth may be variously determined according to the capacity and needs of the wireless communication system.

As such, when it is determined that the terminal 410 is in the boundary region 13 between the wireless signal processing apparatuses 111 and 112, the digital signal processing apparatus 200 may determine that the wireless signal processing apparatuses 111 and 112 have the same channel ( The same data is transmitted to the terminal 410 through the A channel. In this case, the digital signal processing apparatus 200 should control the radio signal processing apparatuses 111 and 112 to transmit the same data through antennas having different transmission patterns. For example, when the first antenna 1111 is selected by the wireless signal processing apparatus 111, the wireless signal processing apparatus 112 selects the second antenna 1122 to transmit the same data through antennas having different patterns. To be transmitted. The same is true for the opposite case. That is, when the second antenna 1112 is selected by the wireless signal processing device 111, the wireless signal processing device 1122 selects the first antenna 1122.

In addition, the digital signal processing apparatus 200 determines the traffic load of each of the two wireless signal processing apparatuses 111 and 112. Here, the method for determining the traffic load of the wireless signal processing apparatuses 111 and 112 by the digital signal processing apparatus 200 will be apparent to those skilled in the art, so a detailed description thereof will be omitted.

It is determined whether the traffic loads of the wireless signal processing apparatuses 111 and 112 that are determined are greater than the load threshold value, and when the traffic loads of the wireless signal processing apparatuses 111 and 112 that are located in adjacent cells are increased, As described above, the digital signal processing apparatus 200 controls the wireless signal processing apparatuses 111 and 112 to transmit the same data to the terminals 410 and 420 through antennas having different patterns.

That is, in the embodiment of the present invention as described above, the conditions that the terminals 410, 420 should be located in the boundary area 13 between the two radio signal processing devices 111, 112, and also two radio signal processing devices. Only when the traffic load of the 111 and 112 satisfies a condition that must be greater than the load threshold value, the two wireless signal processing apparatuses 111 and 112 to the terminals 410 and 420 through one antenna having different patterns from each other. Send data.

On the other hand, in the above, if the traffic load of the two wireless signal processing devices (111, 112) are all equal to or less than the load threshold, it is not necessary to consider the power control of the wireless signal processing devices (111, 112), The wireless signal processing apparatuses 111 and 112 transmit data to the terminals 410 and 420 through two antennas having different patterns. For example, referring to FIG. 7, the wireless signal processing device 111 transmits the same data to the terminal 410 through both the first antenna 1111 and the second antenna, and the wireless signal processing device 112 also. The same data is transmitted to the terminal 410 through the second antenna 1121 and the second antenna 1122. The same applies to the terminal 420. However, when transmitting to the terminal 410 and the terminal 420 it is different to use different channels. That is, the terminal 410 transmits data through the A channel, and the terminal 420 transmits data through the B channel.

Referring now to Figure 8 will be described in detail with respect to the digital signal processing apparatus 200 according to an embodiment of the present invention.

8 is a block diagram of a digital signal processing apparatus 200 according to an embodiment of the present invention.

Referring to FIG. 8, the digital signal processing apparatus 200 includes a receiver 210, a determiner 220, and a processor 230.

The receiver 210 receives a radio signal from the radio signal processing apparatuses 111 and 112. The radio signal includes an uplink signal strength value received by the radio signal processing apparatuses 111 and 112 from the terminals 410 and 420. In addition, the receiver 210 collects traffic loads of the wireless signal processing apparatuses 111 and 112. Here, since the receiving unit 210 collects the traffic load of the wireless signal processing apparatuses 111 and 112, it will be apparent to those skilled in the art, so a detailed description thereof will be omitted.

The determination unit 220 determines whether the terminal 410 is located in the boundary region 13 by performing an operation as shown in Equation 1 based on the signal strength value received by the receiver 210. In addition, the determination unit 220 determines whether any one of the traffic loads of the wireless signal processing apparatuses 111 and 112 collected by the reception unit 210 is greater than the load threshold value.

The processor 230 performs a process for controlling data transmission of the wireless signal processing apparatuses 111 and 112 according to the determination of the determination unit 220. In particular, according to an embodiment of the present invention, the terminals 410 and 420 are located in the boundary region 13 of the wireless signal processing apparatuses 111 and 112, and at the same time any of the traffic loads of the wireless signal processing apparatuses 111 and 112 are applied. If any of the wireless signal processing devices 111 and 112 is determined to have a high traffic load due to a larger than a load threshold, the wireless signal processing devices 111 and 112 may use the same antennas having different transmission patterns. Instructs transmission of the same data to the terminals 410 and 420 through a channel. That is, the processor 230 allocates the same resource to the corresponding radio signal processing apparatuses 111 and 112, and processes and transmits the same data for each antenna having different transmission patterns.

As such, when different radio signal processing apparatuses are located at the boundary area and the traffic load is high, when the terminal transmits the same data to the terminal through one antenna having a different transmission pattern, the plurality of radio signal processing apparatuses may be located between the plurality of radio signal processing apparatuses. That is, by maximizing the diversity effect of the terminal in the border region, it is possible to maximize the performance in the border region and to control the power of the wireless signal processing device.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

Claims (17)

1. A digital signal processing device connected to the core system and processing a wireless digital signal; And

   It is physically separated from the digital signal processing apparatus, converts and amplifies the digital signal received from the digital signal processing apparatus, and transmits the amplified signal to the terminal based on a multi-antenna technique using two antennas. A plurality of wireless signal processing apparatus for receiving a signal transmitted from the terminal based on a multi-antenna technology using an antenna and delivers it to the digital signal processing device

   Including,

   Two wireless signal processing apparatuses among the plurality of wireless signal processing apparatuses transmit the same data signal to a terminal located at a boundary area between the two wireless signal processing apparatuses under the control of the digital signal processing apparatus, but different transmission patterns from each other. Transmitting the same data signal through an antenna having

   Signal processing system, characterized in that.
2. The method of claim 1,

   The two radio signal processing apparatuses each transmit a data signal to the terminal using one of two antennas.
3. The method of claim 2,

   And when one of the traffic loads of the two wireless signal processing apparatuses is greater than a load threshold, the two wireless signal processing apparatuses transmit a data signal to the terminal.
4. The method of claim 3,

   The two wireless signal processing apparatuses transmit signal strength values of the uplink received from the terminal to the digital signal processing apparatus.

   And the digital signal processing apparatus determines whether the terminal is located within the boundary area of the terminal based on signal strength values transmitted from the two wireless signal processing apparatuses.
5. The method of claim 4, wherein

   The digital signal processing device,

   When the difference between the signal strength values transmitted from the two radio signal processing apparatuses is less than or equal to a threshold value, the terminal is determined to be located in the border region, and the two radio signal processing apparatuses use antennas having different transmission patterns. And control to transmit the same data to the terminal, respectively.
6. The method of claim 5,

   The digital signal processing device,

   And a signal processing apparatus having a larger signal strength value to transmit data to the terminal when a difference between signal strength values transmitted from the two radio signal processing apparatuses is greater than a threshold value.
7. The method of claim 5,

   The digital signal processing device,

   And when both traffic loads of the two radio signal processing apparatuses are less than or equal to the load threshold, the two radio signal processing apparatuses transmit data signals to the terminal using two antennas.
8. The method of claim 3,

   The digital signal processing device,

   Signal processing system for allocating the same channel to the two wireless signal processing apparatus.
9. Physically separated from a plurality of wireless signal processing devices installed in a service area and processing wireless signals, wherein the plurality of wireless signal processing devices, wherein the plurality of wireless signal processing devices are based on a multi-antenna technology using two antennas. A digital signal processing apparatus for processing a radio signal from a terminal for transmitting and receiving a signal,

   Receive signal strength values of the uplink received by the two wireless signal processing devices from the terminal from two wireless signal processing devices of the plurality of wireless signal processing devices, and collects the traffic load of each of the two wireless signal processing devices A receiving unit;

   On the basis of the difference in the signal strength value received through the receiver, it is determined whether the terminal is located within the boundary area between the two radio signal processing apparatuses and at the same time loads any one of the traffic loads of the two radio signal processing apparatuses. Determination unit for determining whether greater than the threshold value; And

   If it is determined by the determination unit that the terminal is located within the boundary area between the two radio signal processing apparatuses, and any one of the traffic loads of the two radio signal processing apparatuses is greater than the load threshold value, A processor that transmits the same data signal to a terminal located in a boundary area, but controls the two radio signal processing apparatuses to transmit the same data signal through each one antenna having a different transmission pattern.

   Digital signal processing apparatus comprising a.
10. The method of claim 9,

    The determination unit,

    And determining that the terminal is located within a boundary area between the two wireless signal processing apparatuses when the difference between the signal strength values received through the receiving unit is equal to or less than a threshold.
11. The method of claim 9,

    The plurality of radio signal processing apparatuses use resources according to orthogonal frequency division multiplexing (OFDM) or resources according to wideband code division multiple access (WCDMA). Digital signal processing apparatus for transmitting the data signal to the terminal.
12. A plurality of wireless signal processing devices for processing a wireless signal by installing a digital signal processing device for processing a wireless digital signal, wherein the plurality of wireless signal processing device is based on a multi-antenna technology using two antennas A method of processing signals from transmitting and receiving signals, the method comprising:

    On the basis of signal strength values received from two wireless signal processing devices of the plurality of wireless signal processing devices, it is determined whether the terminal is located within a boundary area between the two wireless signal processing devices, and the two wireless signals Determining whether any of the traffic loads of the processing device is greater than the load threshold; And

    If the terminal is located in the boundary area between the two radio signal processing apparatuses, and it is determined that any one of the traffic loads of the two radio signal processing apparatuses is greater than the load threshold value, the terminal located in the boundary region Controlling the two wireless signal processing apparatuses to transmit the same data signal through each one antenna having the same data signal but having different transmission patterns;

    Signal processing method comprising a.
13. The method of claim 12,

    The determining step,

    The two wireless signal processing apparatuses receive uplink signal strength values received from the terminal by two wireless signal processing apparatuses among the plurality of wireless signal processing apparatuses, and collect traffic loads of the two wireless signal processing apparatuses, respectively. Making; And

    When the difference between the received signal strength values is less than or equal to a threshold value, it is determined that the terminal is located within a boundary area between the two radio signal processing apparatuses, and any one of the traffic loads of the two radio signal processing apparatuses is determined. Determining if it is greater than the threshold

    Signal processing method comprising a.
14. A wireless signal processing device installed in a service area for processing a wireless signal, wherein the wireless signal processing device transmits and receives a signal to and from a terminal based on a multi-antenna technology using two antennas.

    Transmitting a signal strength value received from the terminal to a digital signal processing apparatus; And

    Under the control of the digital signal processing apparatus, the same data signal as the neighboring wireless signal processing apparatus is transmitted to the terminal, but the neighboring wireless signal processing apparatus has a different transmission pattern from one antenna for transmitting a signal to the terminal. Transmitting a data signal to the terminal through one antenna

    Signal processing method comprising a.
15. The method of claim 14,

    The digital signal processing apparatus is connected to a plurality of wireless signal processing units, and is physically separated from the plurality of wireless signal processing units, and the signal processing unit digitally processes a wireless signal from the wireless signal processing unit and transmits the digital signal to the core system. Way.
16. The method of claim 15,

    The step of transmitting the data signal to the terminal,

    The terminal is located in a boundary area between the radio signal processing device and the neighboring radio signal processing device, and it is determined that any one of the traffic loads of the two radio signal processing devices is greater than the load threshold. .
17. The method of claim 14,

    The signal processing method is determined when the difference between the signal strength value of the wireless signal processing device and the signal strength value of the neighboring wireless signal processing device is less than or equal to a threshold when located in the boundary area.

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