KR20130050201A - Apparatus for processing digital signal, system for processing signal including same and method for processing signal - Google Patents

Apparatus for processing digital signal, system for processing signal including same and method for processing signal Download PDF

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Publication number
KR20130050201A
KR20130050201A KR1020110115419A KR20110115419A KR20130050201A KR 20130050201 A KR20130050201 A KR 20130050201A KR 1020110115419 A KR1020110115419 A KR 1020110115419A KR 20110115419 A KR20110115419 A KR 20110115419A KR 20130050201 A KR20130050201 A KR 20130050201A
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South Korea
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signal processing
wireless signal
terminal
processing apparatus
wireless
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KR1020110115419A
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Korean (ko)
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이기호
이용규
지영하
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주식회사 케이티
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Publication of KR20130050201A publication Critical patent/KR20130050201A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/022—Site diversity; Macro-diversity
    • H04B7/024—Co-operative use of antennas of several sites, e.g. in co-ordinated multipoint or co-operative multiple-input multiple-output [MIMO] systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W64/00—Locating users or terminals or network equipment for network management purposes, e.g. mobility management

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

PURPOSE: A digital signal processing device, a signal processing system, and a signal processing method are provided to control data transmission between an RU(Radio Unit) and a DU(Digital Unit) by separating the RU from the DU. CONSTITUTION: A plurality of RUs(110,120,130) is physically separated from a DU(200). A plurality of the RUs is amplified by converting a digital signal received from the DU. A plurality of the RUs transmits a signal amplified based on MIMO(Multiple Input Multiple Output) using two antennas. A plurality of the RUs receives a signal transmitted from the terminal based on the MIMO using the two antennas. A plurality of the RUs transmits the received signal to the DU. [Reference numerals] (300) Core system; (AA) Network

Description

Digital signal processing device, signal processing system and signal processing method {APPARATUS FOR PROCESSING DIGITAL SIGNAL, SYSTEM FOR PROCESSING SIGNAL INCLUDING SAME AND METHOD FOR PROCESSING SIGNAL}

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

Generally, a communication base station is largely included in one physical system together with a digital signal processing unit and a radio signal processing unit. However, such a system has a limitation in the optimization of the cell design because the base station including all the processing units must be installed in the cell. To improve this, a plurality of antennas are connected to a single base station, and cells are formed in a required manner to reduce a coverage hole.

However, this approach allows efficient cell design, but it is 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.

The technical problem to be achieved by the present invention is to maximize the capacity of the communication system and to efficiently perform data management.

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

A digital signal processing device connected to the core system for 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 technology using two antennas; 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, each of the same data signal through the antenna having the same transmission pattern It is done.

Here, the two wireless signal processing apparatuses transmit uplink signal strength values received from the terminal to the digital signal processing apparatus, and the digital signal processing apparatuses transmit signal strength values transmitted from the two wireless signal processing apparatuses. Based on the determination whether 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. It is characterized in that the control to transmit the same data to the terminal by using the antenna having the same transmission pattern with each other.

The digital signal processing apparatus may control the wireless signal processing apparatus having a large 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. It is characterized by.

The digital signal processing apparatus may allocate 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; Receiving unit for receiving a signal strength value; A determination unit determining whether the terminal is located within a boundary area between the two wireless signal processing apparatuses based on a difference in signal strength values received through the reception unit; And when the terminal determines that the terminal is located within a boundary area between the two radio signal processing apparatuses, transmits the same data signal to the terminal located at the boundary area, but has the same transmission pattern. It includes a processing unit for controlling the two wireless signal processing apparatus to transmit the same data signal through each.

The determination unit may determine 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 reception unit is equal to or less than a threshold value.

In addition, the plurality of radio signal processing apparatuses may include resources according to orthogonal frequency division multiplexing (hereinafter, referred to as "OFDM") or resources according to wideband code division multiple access (WCDMA). It is characterized in that for transmitting the data signal 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 it is located in an area; And when the terminal is determined to be located in a boundary area between the two radio signal processing apparatuses, transmits the same data signal to a terminal located in the boundary area, but through the antennas having the same transmission pattern, respectively. Controlling the two wireless signal processing apparatuses to transmit.

The determining may include receiving an uplink signal strength value 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 determining that the terminal is located within a boundary area between the two wireless signal processing apparatuses when the difference between the received signal strength values is equal to or less than a threshold value.

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 an antenna having the same transmission pattern as the antenna for transmitting the same data signal as the neighboring wireless signal processing device to the terminal under the control of the digital signal processing device, and the neighboring wireless signal processing device transmitting the signal to the terminal. Transmitting a data signal to the terminal through.

Here, the digital signal processing device is connected to a plurality of wireless signal processing, and is physically separated from the plurality of wireless signal processing devices, and digitally processes wireless signals from the wireless signal processing device and delivers them to the core system. It is characterized by.

The transmitting of the data signal to the terminal may be performed when the terminal is determined to be located at a boundary area between the wireless signal processing apparatus and the neighboring wireless signal processing apparatus.

In addition, when it is determined that the location is located in the border area, 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 less than the threshold value.

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

A digital signal processing device connected to the core system for 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 technology using two antennas; Is a quasi-border area between the two radio signal processing apparatuses, where the difference between the signal strength values received from two antennas of one radio signal processing apparatus is a first threshold under the control of the digital signal processing apparatus. Is greater than the value and falls below the second threshold The one wireless signal processing apparatus transmits data through two antennas to a terminal, and the wireless signal processing apparatus adjacent to the one wireless signal processing apparatus receives a weak signal from two antennas of the one wireless signal processing apparatus. The same data is transmitted to the terminal through an antenna having the same transmission pattern as the antenna.

Here, the one wireless signal processing apparatus receives signal strength values received from two antennas of the one wireless signal processing apparatus reported from the terminal and transmits the signal strength values to the digital signal processing apparatus, and the digital signal processing apparatus The location of the terminal within the quasi-border area is determined based on the signal strength value transmitted from the one wireless signal processing apparatus.

The digital signal processing apparatus may be configured such that the terminal is located in the quasi-border area when a difference between signal strength values transmitted from the one wireless signal processing apparatus is greater than the first threshold value and less than the second threshold value. In operation, the one wireless signal processing apparatus transmits data to the terminal through two antennas, and the wireless signal processing apparatus adjacent to the one wireless signal processing apparatus is selected from two antennas of the one wireless signal processing apparatus. The controller transmits the same data to the terminal through an antenna having the same transmission pattern as the antenna from which the signal is weakly received.

In addition, the digital signal processing apparatus allocates the same channel to the one wireless signal processing apparatus and the adjacent wireless signal processing apparatus.

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 wireless signal from a terminal for transmitting and receiving a signal, comprising: one of the one wireless signal processing apparatus reported from the terminal from one of the plurality of wireless signal processing apparatuses; A receiver for receiving signal strength values received from two antennas; Based on the difference in signal strength values received through the receiver, the terminal receives a signal from two antennas of the one wireless signal processing device in the quasi-border area between the two radio signal processing devices, wherein the quasi-border area. A determination unit that determines whether the difference between the intensity values is greater than the first threshold value and is less than or equal to the second threshold value; And when the terminal determines that the terminal is located within the quasi-border area, the one wireless signal processing apparatus transmits data through two antennas to the terminal, and the one wireless signal processing apparatus. The wireless signal processing apparatus adjacent to the wireless signal processing apparatus is configured to transmit the same data to the terminal through an antenna having the same transmission pattern as an antenna whose signal is weakly received among two antennas of the one wireless signal processing apparatus. And a processor configured to control the adjacent radio signal processing apparatus.

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 CLAIMS 1. A method for processing signals from transmitting and receiving signals, the method comprising: signals received from two antennas of one radio signal processing device reported from the terminal from one radio signal processing device of the plurality of radio signal processing devices; The sub-boundary region between the two radio signal processing apparatuses based on the strength value, wherein the difference between the signal strength values received from the two antennas of the one radio signal processing apparatus is a first threshold value. Is greater than or equal to the second threshold—determined if it is within The step; And when it is determined that the terminal is located within the quasi-border area, the one wireless signal processing apparatus transmits data through two antennas to the terminal, and the wireless signal processing apparatus adjacent to the one wireless signal processing apparatus. The one wireless signal processing apparatus and the adjacent wireless signal processing apparatus are configured to transmit the same data to the terminal through an antenna having the same transmission pattern as an antenna whose signal is weakly received among two antennas of the one wireless signal processing apparatus. Controlling the step.

Here, in the controlling step, the one radio signal processing device and the adjacent radio signal processing device may be controlled to transmit data through the same channel.

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. 1, the wireless signal processing apparatus, receiving a signal strength value received from the two antennas of the first wireless signal processing device to the terminal from the terminal and transmitting to the digital signal processing apparatus; And the first wireless signal processing apparatus transmits data to the terminal through two antennas, and the second wireless signal processing apparatus adjacent to the first wireless signal processing apparatus is controlled by the digital signal processing apparatus. The method includes transmitting the same data to the terminal through an antenna having the same transmission pattern as an antenna from which two signals are weakly received.

Here, the digital signal processing device is connected to a plurality of wireless signal processing, physically separated from the first wireless signal processing device and the second wireless signal processing device, the first wireless signal processing device and the second wireless And digitally processing the radio signal from the signal processing device to the core system.

The transmitting of the data to the terminal may include: a signal strength value received from the two antennas of the first wireless signal processing device in the quasi-border area of the first wireless signal processing device, wherein the quasi-border area; Is a case where it is determined that the difference is greater than the first threshold value and corresponds to the second threshold value or less.

According to the present invention, the digital signal processing unit and the wireless signal processing unit existing in one base station can be separated, and the data transmission between the wireless signal processing unit and the terminal can be controlled to maximize the capacity of the communication system and efficiently perform data management. .

1 is a schematic configuration 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 included in a cell according to an embodiment of the present invention.
7 is a block diagram of a digital signal processing apparatus according to an embodiment of the present invention.
8 is a diagram illustrating an example of a signal transmitted by a plurality of wireless signal processing apparatus included in a cell according to another 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. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. 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. Also, the terms " part, "" module," and " module ", etc. in the specification mean a unit for processing at least one function or operation and may be implemented by hardware or software or a combination of hardware and software have.

In this specification, a terminal includes a mobile station (MS), a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS), a user equipment , An access terminal (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 mobile subscriber station, a user equipment,

In this specification, a base station (BS) includes an access point (AP), a radio access station (RAS), a node B, an evolved NodeB (eNodeB) A base station (BTS), a mobile multihop relay (MMR) -BS, or the like, and may perform all or a part of functions of an access point, a radio access station, a Node B, an eNodeB, a base transceiver station, .

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 configuration 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. A plurality of wireless signal processing apparatuses 100, 110, 120 and 130 are connected to the digital signal processing apparatus 200, and each wireless signal processing apparatus 100 is installed in a service area, that is, a 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 not installed in a service area but is mainly installed in a central office of a communication company, and is a virtualized base station. The digital signal processing apparatus 200 transmits and receives signals to and from a plurality of radio 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 the service target area. On the other hand, the system according to the present invention physically separates the wireless signal processing device 100 and the digital signal processing device 200, and only the wireless signal processing device 100 is installed in the service area.

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

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, patterns of reference signals used for 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 each of the antennas of the wireless signal processing apparatuses 111 to 117 may be referred to. The signal Ro is used, and all the second antennas use the reference signal R 1 . At this time, the reference signals R 0 and R 1 may use resources according to an orthogonal frequency division multiplexing (OFDM) scheme as shown in FIG. 3 and FIG.

Meanwhile, the radio signal processing apparatuses 111-117 included in one cell 10 can selectively transmit data signals using the same or different channels, and the cooperative radio signal processing apparatuses 112-117, Transmits the data signal using the same channel used by the macro wireless signal processing device 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 10 and the cell 2 12 basically transmit data signals to a terminal close to the cell. However, when the terminals 410 and 420 are in the boundary area 13 which can receive signals from the two wireless signal processing apparatuses 111 and 112, the two wireless signal processing apparatuses 111 and 112 are the terminal 410. , 420 respectively transmit the same data signal.

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 have the same transmission pattern. The same data is transmitted to the terminal 410 through the antenna having a. For example, the wireless signal processing apparatus 111 transmits data based on the first transmission pattern to the terminal 410 through the first antenna 1111 transmitted in the first transmission pattern, and the wireless signal processing apparatus 112. Also, data based on the first transmission pattern is transmitted to the terminal 410 through the first antenna 1121 transmitting the first transmission pattern. In addition, the wireless signal processing apparatus 111 transmits data based on the second transmission pattern to the terminal 410 through the second antenna 1112 transmitting in the second transmission pattern, and the wireless signal processing apparatus 112 also performs a second operation. The second antenna 1122 transmits data based on the second transmission pattern to the terminal 410 through the second transmission pattern. That is, the first antenna 1111 of the wireless signal processing device 111 and the first antenna 1121 of the wireless signal processing device 112 transmit the same data of the same pattern to the terminal 410 through the same channel A. FIG. The second antenna 1112 of the wireless signal processing device 111 and the second antenna 1122 of the wireless signal processing device 112 transmit the same data of the same pattern through the same channel A. To send.

Similarly, the terminal 420 transmits data based on the first transmission pattern to the terminal 420 through the first antenna 1111 transmitted by the wireless signal processing apparatus 111 in the first transmission pattern, and performs wireless signal processing. The device 112 also transmits data based on the first transmission pattern to the terminal 420 through the first antenna 1121 transmitting the first transmission pattern. In addition, the wireless signal processing apparatus 111 transmits data based on the second transmission pattern to the terminal 420 through the second antenna 1112 transmitting in the second transmission pattern, and the wireless signal processing apparatus 112 also performs a second operation. The second antenna 1122 transmits data based on the second transmission pattern to the terminal 420 through the second 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 first antenna 1111 of the wireless signal processing device 111 and the first antenna 1121 of the wireless signal processing device 112 transmit the same data of the same pattern to the terminal 420 through the same channel B. The second antenna 1112 of the wireless signal processing device 111 and the second antenna 1122 of the wireless signal processing device 112 transmit the same data of the same pattern through the same channel B to the terminal 410. 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 the antenna in the same transmission pattern, the quality of the data signals received by the terminals 410 and 420 may be improved. Can be. 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 method of determining whether two radio signal processing apparatuses 111 and 112 transmit the same data to one terminal 410 through different antennas will be described.

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 must control the wireless signal processing apparatuses 111 and 112 to transmit the same data through antennas having the same transmission pattern. For example, the first antenna 1111 of the wireless signal processing device 111 and the first antenna 1121 of the wireless signal processing device 112 transmit the same data, and also the The second antenna 1112 and the second antenna 1122 of the wireless signal processing apparatus 1122 are controlled to transmit the same data.

A digital signal processing apparatus 200 according to an embodiment of the present invention will now be described in detail with reference to FIG. 7.

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

Referring to FIG. 7, the digital signal processing apparatus 200 includes a receiver 210, a calculator 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.

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.

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, when it is determined that the terminals 410 and 420 are located in the boundary area 13 of the wireless signal processing apparatuses 111 and 112, the same as those of the wireless signal processing apparatuses 111 and 112. An antenna having a transmission pattern is instructed to transmit the same data to the terminals 410 and 420 through the same 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 the same transmission pattern.

As described above, when different radio signal processing apparatuses included in one cell transmit the same data to one terminal through antennas having the same transmission pattern to the terminal located in the border region, That is, by maximizing the diversity effect of the terminal in the boundary area can maximize the performance of the boundary area.

Meanwhile, in the above description, a case in which the terminals 410 and 420 are located in the boundary area 13 corresponding to the case where the difference between the intensity values of the signals received from the two wireless signal processing devices 111 and 112 is less than or equal to the threshold is described. It was. However, in the present invention, the terminals 410 and 420 may receive signals from the two wireless signal processing devices 111 and 112 even in an area other than the boundary area 13. However, in such an area, although both signals are received from the two antennas 1111, 1112, 1121, and 1122 provided in the two wireless signal processing apparatuses 111 and 112, the signal received from one antenna is very weak. Therefore, the following describes diversity techniques in these areas.

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

Prior to the description, in another embodiment of the present invention, the wireless signal processing apparatuses 111 and 112 are provided with two antennas 1111, 1112, 1121, and 1122 to support 2x2 multi-antenna technology, and two antennas 1111, 1112, 1121, and 1122 transmit the same data as signals of different transmission patterns, respectively. That is, it is assumed that the first antennas 1111 and 1121 transmit as signals of the first transmission pattern, and the second antennas 1112 and 1122 transmit as signals of the second transmission pattern.

Referring to FIG. 8, the wireless signal processing apparatuses 111 and 112 included in the cell 1 10 and the cell 2 12, respectively, basically transmit data signals to a terminal close to them. However, although the terminals 410 and 420 may receive signals from the two wireless signal processing devices 111 and 112, the signal transmitted from any one of the two antennas 1111, 1112, 1121, and 1122 may be received. In the case of a very weak quasi-border area 14, the antenna is complemented by an antenna of another wireless signal processing device.

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. At this time, one of the signals transmitted from the two antennas 1111 and 1112 of the wireless signal processing device 111 of the cell 1 11 at the terminal 410, that is, the antenna having the first transmission pattern An antenna corresponding to the antenna 1111 of the radio signal processing apparatus 111 among the antennas 1121 and 1122 of the radio signal processing apparatus 112 of the cell 2 12, which is another cell, when the signal transmitted from the receiver is received very weakly. 1121, that is, the antenna 1121 having the first transmission pattern transmits the same data to the terminal 410.

Then, the terminal 410 recognizes the signals of the two paths respectively received from the wireless signal processing apparatuses 111 and 112 with respect to the signal of the first pattern as multipath signals, and combines and recovers the signals.

As such, when the signal received from the specific antenna 1111 is weak among the signals received by the terminal 410, the signal corresponding to the antenna is divided into the same pattern of the radio signal processing apparatus 112 in the adjacent cell 12. The branch is capable of improving a weakly received signal by receiving the same signal from the antenna 1121.

Now, a method of determining whether two wireless signal processing apparatuses 111 and 112 transmit the same data to one terminal 410 in order to secure a weak signal will be described.

First, the wireless signal processing device 111 receives a signal value (A, B) of the signal received from the two antennas 1111 and 1112 of the wireless signal processing device 111 from the terminal 410 and processes the digital signal. To the device 200. Then, the digital signal processing apparatus 200 evaluates whether the quasi-border region 14 of the terminal 410 is located based on the signal strength values A and B received from the wireless signal processing apparatus 111. That is, when the difference between the signal strength values A and B is greater than the first threshold value C and is less than or equal to the second threshold value C ′, as shown in Equation 2, the boundary area 14 provided by the terminal 410 is shown. Can be judged.

&Quot; (2) "

C <| A-B | ≤ C '

If the difference between the signal strength values A and B is less than or equal to the first threshold value C or greater than the second threshold value C ', the terminal 410 is located in an area other than the quasi-border area 14. If it is determined that the data is determined, data transmission is performed according to the area where the location is located.

In this case, the first threshold value C and the second threshold value C ′ may be determined in various ways according to the capacity and needs of the wireless communication system.

As such, when it is determined that the terminal 410 is in the quasi-border area 14 between the wireless signal processing devices 111 and 112, the digital signal processing device 200 may use two antennas of the wireless signal processing device 111. The antenna 1121 of the wireless signal processing apparatus 1112 corresponding to the weak antenna 1111 among the signals 1111 and 1112 transmits the same data to the terminal 410 through the same channel A. FIG.

The digital signal processing apparatus 200 illustrated in FIG. 7 may also be applied to another embodiment of the present invention. In this case, the receiver 210 receives a signal strength value that the terminal 410 receives from two antennas of the wireless signal processor 111 from the wireless signal processor 111, and the determination unit 220 receives a receiver ( On the basis of the signal strength values A and B received by the 210, the operation as shown in Equation 2 is performed to determine whether the terminal 210 is located in the quasi-border region 14.

In addition, 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 another embodiment of the present invention, when it is determined that the terminal 410 is located in the quasi-border area 14 of the wireless signal processing apparatuses 111 and 112, two antennas of the wireless signal processing apparatus 111 may be used. Among the 1111 and 1112, an antenna 1121 of the wireless signal processing apparatus 112 corresponding to the antenna 1111 that is weakly received is instructed to transmit the same data to the terminal 410 through the same channel. That is, the processor 230 allocates the same resource to the radio signal processing apparatus 112 and controls the antenna 1121 having the same transmission pattern to process and transmit the same data.

As such, when different radio signal processing apparatuses included in one cell are located in a quasi-border area and a signal is weakly received from a specific antenna, the signal corresponding to this antenna is transmitted to the same transmission pattern of the radio signal processing apparatus of an adjacent cell. When the same signal is transmitted to the terminal through the antenna, the performance of the boundary region may be maximized by maximizing the diversity effect of the terminal between the plurality of wireless signal processing apparatuses, that is, the quasi-border region.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (25)

A digital signal processing device connected to the core system for processing a wireless digital signal; And
And converting the digital signal received from the digital signal processor into a digital signal and transmitting the amplified signal to the terminal based on a multi-antenna technique using two antennas, A plurality of wireless signal processing apparatuses for receiving signals transmitted from a terminal based on a multi-antenna technique using an antenna and transmitting the received signals to the digital signal processing apparatus,
Including,
Two wireless signal processing apparatuses of 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 the same transmission pattern Transmitting the same data signal through an antenna having
Signal processing system, characterized in that. The method of claim 1,
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. The method of claim 2,
The digital signal processing apparatus comprising:
If 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 boundary region, and the two radio signal processing apparatuses use antennas having the same transmission pattern. And control to transmit the same data to the terminal, respectively. The method of claim 3,
The digital signal processing apparatus comprising:
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. The method of claim 3,
The digital signal processing apparatus comprising:
Signal processing system for allocating the same channel to the two wireless signal processing apparatus. 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,
A receiver configured to receive an uplink signal strength value received by the two wireless signal processing apparatuses from a terminal from two wireless signal processing apparatuses among the plurality of wireless signal processing apparatuses;
A determination unit determining whether the terminal is located within a boundary area between the two wireless signal processing apparatuses based on a difference in signal strength values received through the reception unit; And
If it is determined by the determination unit that the terminal is located in the boundary area between the two radio signal processing apparatuses, the antennas having the same transmission pattern while transmitting the same data signal to the terminal located in the boundary area A processor for controlling the two wireless signal processing apparatus to transmit the same data signal through each
Digital signal processing apparatus comprising a. The method according to claim 6,
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 value. The method according to claim 6,
The plurality of radio signal processing apparatuses use resources according to orthogonal frequency division multiplexing (hereinafter referred to as " OFDM &quot;) or resources according to wideband code division multiple access (WCDMA). Digital signal processing apparatus for transmitting the data signal to the terminal. 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:
Determining whether the terminal is located within a boundary area between the two wireless signal processing apparatuses based on signal strength values received from two wireless signal processing apparatuses among the plurality of wireless signal processing apparatuses; And
When it is determined that the terminal is located in the boundary area between the two radio signal processing apparatuses, the same data signal is transmitted to the terminal located in the boundary area, but the same data signal is transmitted through antennas having the same transmission pattern. Controlling the two wireless signal processing devices to transmit
/ RTI &gt; 10. The method of claim 9,
The determining step,
Receiving an uplink signal strength value received from a terminal by two wireless signal processing apparatuses from two wireless signal processing apparatuses among the plurality of wireless signal processing apparatuses; And
Determining that the terminal is located within a boundary area between the two wireless signal processing apparatuses when the difference between the received signal strength values is equal to or less than a threshold value;
/ RTI &gt; 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, an antenna having the same transmission pattern as the antenna for transmitting the same data signal to the terminal as the neighboring wireless signal processing apparatus and transmitting the signal to the terminal. Transmitting a data signal to the terminal through
/ RTI &gt; The method of claim 11,
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. The method of claim 12,
The step of transmitting the data signal to the terminal,
And the terminal is determined to be located in a boundary area between the wireless signal processing device and the neighboring wireless signal processing device. The method of claim 13,
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. A digital signal processing device connected to the core system for processing a wireless digital signal; And
And converting the digital signal received from the digital signal processor into a digital signal and transmitting the amplified signal to the terminal based on a multi-antenna technique using two antennas, And a plurality of radio signal processing apparatuses for receiving a signal transmitted from a terminal based on a multi-antenna technique using an antenna and transmitting the received signal to the digital signal processing apparatus,
Two wireless signal processing apparatuses of the plurality of wireless signal processing apparatuses may be configured to include two or more wireless signal processing apparatuses in a semi-border area between the two wireless signal processing devices under the control of the digital signal processing device. The wireless signal processing apparatus transmits data through two antennas to a terminal located at a difference between signal strength values received from two antennas greater than a first threshold and corresponding to a second threshold. The wireless signal processing apparatus adjacent to the wireless signal processing apparatus of the wireless signal processing apparatus for transmitting the same data to the terminal through the antenna having the same transmission pattern as the antenna that is weakly received from the two antennas of the one wireless signal processing apparatus
Signal processing system, characterized in that. 16. The method of claim 15,
The one wireless signal processing apparatus receives signal strength values received from two antennas of the one wireless signal processing apparatus reported from the terminal and transmits the signal strength values to the digital signal processing apparatus.
And the digital signal processing apparatus determines whether the terminal is located within the quasi-border area of the terminal based on a signal strength value transmitted from the one wireless signal processing apparatus. 17. The method of claim 16,
The digital signal processing apparatus comprising:
If the difference between the signal strength value transmitted from the one wireless signal processing device is greater than the first threshold value and less than the second threshold value, it is determined that the terminal is located in the quasi-border area,
The one wireless signal processing apparatus transmits data to the terminal through two antennas, and the wireless signal processing apparatus adjacent to the one wireless signal processing apparatus has a weak signal among two antennas of the one wireless signal processing apparatus. A signal processing system for controlling to transmit the same data to the terminal through an antenna having the same transmission pattern as the received antenna. 18. The method of claim 17,
The digital signal processing apparatus comprising:
A signal processing system for allocating the same channel to the one wireless signal processing device and the adjacent wireless signal processing device. 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,
A receiving unit for receiving signal strength values received from two antennas of the one wireless signal processing device reported from the terminal, from one of the plurality of wireless signal processing devices;
Based on the difference in signal strength values received through the receiver, the terminal receives a signal from two antennas of the one wireless signal processing device in the quasi-border area between the two radio signal processing devices, wherein the quasi-border area. A determination unit that determines whether the difference between the intensity values is greater than the first threshold value and is less than or equal to the second threshold value; And
If it is determined by the determination unit that the terminal is located in the quasi-border area, the one wireless signal processing apparatus transmits data to the terminal through two antennas, and transmits the data to the one wireless signal processing apparatus. The adjacent wireless signal processing apparatus and the one wireless signal processing apparatus and the one to transmit the same data to the terminal through the antenna having the same transmission pattern as the antenna of the weakly received signal of the two antennas of the one wireless signal processing apparatus Processing unit for controlling the adjacent wireless signal processing device
Digital signal processing apparatus comprising a. 20. The method of claim 19,
The plurality of radio signal processing apparatuses use resources according to orthogonal frequency division multiplexing (hereinafter referred to as " OFDM &quot;) or resources according to wideband code division multiple access (WCDMA). Digital signal processing apparatus for transmitting the data signal to the terminal. 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:
The terminal processes the two radio signals based on a signal strength value received from one of the plurality of radio signal processing devices, the two antennas of the one radio signal processing device reported from the terminal. Quasi-border zones between devices, where quasi-border zones are located within the quasi-border zone where the difference in signal strength received from the two antennas of the one radio signal processing device is greater than the first threshold and less than or equal to the second threshold. Determining; And
When it is determined that the terminal is located within the quasi-border area, the one wireless signal processing apparatus transmits data through two antennas to the terminal, and the wireless signal processing apparatus adjacent to the one wireless signal processing apparatus The wireless signal processing device and the adjacent wireless signal processing device may be configured to transmit the same data to the terminal through an antenna having the same transmission pattern as an antenna from which two signals of the one wireless signal processing device are weakly received. Controlling steps
/ RTI &gt; The method of claim 21,
And in the controlling step, controlling the one wireless signal processing device and the adjacent wireless signal processing device to transmit data through the same channel. 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.
A first wireless signal processing apparatus, receiving a signal strength value received from two antennas of the first wireless signal processing apparatus by the terminal from the terminal and transmitting the signal strength value to the digital signal processing apparatus; And
According to the control of the digital signal processing apparatus, the first wireless signal processing apparatus transmits data through the two antennas to the terminal, and the second wireless signal processing apparatus adjacent to the first wireless signal processing apparatus is the first signal. Transmitting the same data to the terminal through an antenna having the same transmission pattern as an antenna in which a signal is weakly received among two antennas of a wireless signal processing apparatus;
/ RTI &gt; 24. The method of claim 23,
The digital signal processing apparatus is connected to a plurality of wireless signal processing, and is physically separated from the first wireless signal processing apparatus and the second wireless signal processing apparatus, and the first wireless signal processing apparatus and the second wireless signal processing. A signal processing method that digitally processes wireless signals from a device and delivers them to a core system. 25. The method of claim 24,
The step of transmitting the data to the terminal,
In the quasi-border area of the first radio signal processing apparatus, wherein the terminal is a difference between the signal strength values received from two antennas of the first radio signal processing apparatus in a quasi-border area of the first radio signal processing apparatus, is greater than a first threshold value and a second threshold value. The signal processing method when it is determined that it is located in the following.
KR1020110115419A 2011-11-07 2011-11-07 Apparatus for processing digital signal, system for processing signal including same and method for processing signal KR20130050201A (en)

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KR1020110115419A KR20130050201A (en) 2011-11-07 2011-11-07 Apparatus for processing digital signal, system for processing signal including same and method for processing signal

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