KR101209325B1 - Apparatus and method for transmitting and receiving signal in a wireless communication system - Google Patents

Abstract

The present invention relates to a method for transmitting and receiving signals in a wireless communication system including at least two base stations and terminals capable of communicating with the base stations. In response to detecting a second base station having a signal strength corresponding to the first base station communicating with the terminal, requesting a signal transmission to the second base station through the first base station, and in response to the signal transmission request When the base station is notified that the signal can be transmitted from the second base station, and the signal is transmitted from the second base station, the signal is received from the first base station and the second base station, respectively.

Signal transmission and reception, macro multiplexing, terminals, serving base stations, neighbor base stations

Description

A device and method for transmitting and receiving signals in a wireless communication system {APPARATUS AND METHOD FOR TRANSMITTING AND RECEIVING SIGNAL IN A WIRELESS COMMUNICATION SYSTEM}

1 schematically illustrates a general wireless communication system.

2 is a schematic diagram illustrating a fast cell location selection scheme in a typical wireless communication system.

3 is a diagram schematically illustrating a soft handover scheme in a general wireless communication system.

4 is a diagram schematically illustrating a structure of a wireless communication system according to an embodiment of the present invention.

5 is a signal flowchart according to a signal transmission and reception operation in a wireless communication system according to an embodiment of the present invention.

6 is a diagram schematically illustrating operations of a base station and a terminal of a wireless communication system according to an embodiment of the present invention.

7 schematically illustrates the structure of a junction detector according to an embodiment of the present invention.

8 is a diagram schematically illustrating a structure of a base station controller and base stations of a wireless communication system according to an embodiment of the present invention.

9 is a diagram schematically illustrating a structure of a base station controller and base stations of a wireless communication system according to another embodiment of the present invention.

The present invention relates to a communication system, and more particularly, to an apparatus and method for transmitting and receiving a signal at a cell boundary area in a wireless communication system.

A general wireless communication system manages a service area, a cell, and communicates with a plurality of base stations (BSs) providing services to a plurality of mobile stations (MSs) and the base stations. It consists of multiple terminals.

At this time, the terminal located in the cell boundary area has a weaker signal strength than the terminal in the center of the cell from the serving BS communicating with the current terminal, This reduces signal reception performance. In particular, in a wireless communication system having a frequency reuse factor of 1, the influence of interference signals of neighboring base stations is very large. The structure of such a wireless communication system is shown in the following figure.

1 is a diagram schematically illustrating a structure of a general wireless communication system.

Referring to FIG. 1, a wireless communication system has a plurality of cell structures, that is, a cell having a cell 100 and a cell 150, a first base station 110 managing a cell 100, and a cell 150. It includes a second base station 160 and the terminal 130 to manage. At this time, the first base station 110 communicates with the terminal 130 as a serving base station of the terminal 130.

Meanwhile, the terminal 130 is located at the boundary area of the cell 100, and the terminal 130 receives the weak first base station 110 transmission signal. Furthermore, the signal receiving performance of the terminal is degraded due to the influence of the interference signal of the neighboring base station, that is, the second base station 160. A fast cell site selection (FCSS) technique or a soft handover technique has been proposed to improve performance in such a cell boundary region. Accordingly, the fast cell position selection technique and the soft handover technique will be described with reference to the accompanying drawings.

2 is a diagram schematically illustrating a fast cell location selection technique in a general wireless communication system.

Referring to FIG. 2, the horizontal axis represents time and the vertical axis represents received signal strength of each cell, that is, a base station. The reception signal of each base station, that is, the first base station and the second base station is shown.

The fast cell location selection scheme assumes communication with one cell, that is, one serving base station, so that the terminal selects a base station having a large received signal strength and receives a signal from the base station. In this case, the signals received from the respective base stations are the same signal, and thus, it is possible to select a base station having a large received signal strength and receive the signal to restore the signal. Accordingly, the signal reception performance of the terminal is improved according to the cell receiving the signal of the terminal, that is, the base station.

Accordingly, the terminal receives a signal of the first base station when the signal strength of the first base station is large, and receives a signal of the second base station when the signal strength of the second base station is large. Receiving a signal of a cell having a large signal strength, that is, a base station according to the signal strength, is shown in the figure.

3 is a diagram schematically illustrating a soft handover scheme in a general wireless communication system.

Referring to FIG. 3, the horizontal axis represents time, and the vertical axis represents received signal strength of each cell, that is, a base station. And the received signal of each base station, that is, the first base station and the second base station is shown.

The soft handover scheme soft combines the signals received from each base station. Here, as in the fast cell location selection scheme, the signals received from each base station are the same. The soft combining technique improves signal reception performance by combining signals of the base stations.

The terminal performs soft combining, and a signal obtained by soft combining the received signals of the first base station and the second base station is shown in the figure. Herein, a high-speed cell position selection technique and a soft combining technique are described as examples to improve signal reception performance. However, when recovering a signal using the above techniques, it was possible to perform a more accurate detection of the received signal in detecting the received signal. However, there is a problem that waste occurs in the use of channel resources of the base stations because the same signal must be transmitted from the base stations. In addition, the use of a method of receiving the same data from a plurality of base stations and using the same to receive a signal has a problem in that data transmission efficiency is lowered, which causes a decrease in overall system performance.

Accordingly, an object of the present invention is to provide an apparatus and method for transmitting and receiving signals with two or more base stations in a wireless communication system.

Another object of the present invention is to provide an apparatus and method for transmitting and receiving signals with base stations in a cell boundary region in a wireless communication system.

Another object of the present invention is to provide an apparatus and method for transmitting and receiving signals that efficiently use channel resources of base stations.

Another object of the present invention is to provide a signal transmission and reception apparatus and method for improving data transmission efficiency in a wireless communication system.

According to an aspect of the present invention, a method for transmitting and receiving a signal in a terminal capable of communicating with at least two base stations includes: detecting a second base station having a signal strength corresponding to a first base station communicating with the terminal; And requesting signal transmission to the second base station through the first base station, receiving a signal from the second base station via the first base station in response to the signal transmission request, and And when notified that signal transmission is possible from the second base station, receiving a signal from the first base station and the second base station, respectively.

Another method of the present invention for achieving the above object is a signal transmission and reception method in a wireless communication system including at least two or more base stations and a terminal capable of communicating with the base station, the terminal is a signal strength of the adjacent base stations Measuring a second base station having a signal strength corresponding to a first base station communicating with the terminal as a result of the measurement; transmitting a second base station signal reception request message to the first base station; In response to a transmission request message, transmitting a signal transmission possible confirmation message to the second base station to confirm whether the first base station can transmit a signal to the terminal; and the second base station can transmit a signal to the terminal. Signal is transmitted to the first base station in response to the transmittable confirmation message. Transmitting a message; when receiving the signal capable of transmitting a message, transmitting, by the first base station, a signal transmission permission message to the terminal; and receiving, by the terminal, the signal transmission permission message. And receiving and restoring a signal from the second base station.

A further method of the present invention for achieving the above objects is a signal transmission method in a wireless communication system comprising at least two base stations and a terminal capable of communicating with the base station, the first base station to transmit a signal from the terminal Receiving a request message, transmitting a signal transmission possible confirmation message to the second base station in response to the signal transmission request message to confirm whether the first base station can transmit a signal to the terminal; 2 If the base station can transmit a signal to the terminal, characterized in that it comprises the step of transmitting a signal transmission possible message to the terminal in response to the transmission possible confirmation message.

Another method of the present invention for achieving the above object is a method for transmitting a signal by any one of the base stations in a wireless communication system comprising at least two base stations and a terminal capable of communicating with the base station. In response to the signal transmission confirmation message transmitted by the terminal from the first base station, checking whether the signal transmission to the terminal is possible, and if the signal transmission to the terminal, the signal transmission possible confirmation message And transmitting a signal capable of transmitting a signal to the terminal through the first base station in response to the response, and transmitting a signal to the terminal after transmitting the signal capable of transmitting the signal.

According to yet another aspect of the present invention, there is provided a signal reception method in a terminal capable of communicating with at least two base stations, the method comprising: measuring signal strength of neighboring base stations; Detecting a second base station having a signal strength corresponding to a first base station communicating with a terminal; and if detecting the second base station, transmitting a signal transmission request message to the second base station through the first base station; And receiving a signal transmission permission message from the second base station through the first base station in response to the signal transmission request message, receiving a signal from the first base station and the second base station, and receiving the first and second base stations. It characterized by including the process of restoring the signal of.

An apparatus of the present invention for achieving the above objects is a signal transmitting and receiving device in a wireless communication system comprising at least two base stations and a terminal capable of communicating with the base station, corresponding to the first base station currently performing communication Detecting a second base station having a signal strength, checking whether the second base station can transmit a signal through the first base station, and checking that the second base station can transmit a signal; 2 a base station for receiving and restoring a signal from each of the 2 base stations, and upon request of the terminal, confirms whether the second base station can transmit a signal to the terminal, notifies the terminal of the confirmation result, and then sends the corresponding signal to the terminal. Signal transmission from the first base station and the first base station to the terminal; And a second base station for transmitting a signal to the terminal after notifying that the signal can be transmitted to the first base station if the signal can be transmitted to the terminal after receiving a confirmation request. It is done.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the following description, only parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to distract from the gist of the present invention.

The present invention relates to a wireless communication system including a mobile station (MS) capable of communicating with at least two base stations (BS). Accordingly, the terminal proposes to receive and recover different data from a plurality of base stations with which the terminal can communicate.

In this case, when the terminal detects that there is a neighbor base station having a signal strength corresponding to the signal strength of the serving base station of the terminal, the terminal transmits a signal transmission request message to the neighbor base station through the serving base station. And if the communication is possible by allocating resources from the neighboring base station, the terminal receives different data from the serving base station and neighboring base stations.

To this end, the present invention will be described on the premise of an operation of a terminal receiving a signal from the different base stations, which is for convenience of description. In addition to receiving the signal, it is preferable to transmit a signal from the terminal to the serving base station, but it is also possible to transmit the signal to other base stations capable of transmitting and receiving signals other than the serving base station.

4 is a diagram schematically illustrating a structure of a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 4, a wireless communication system has a plurality of cell structures, that is, a first base station 410 and a cell 450 having a cell 400 and a cell 450 and managing the cell 400. It includes a second base station 460 and the terminal 430 to manage. In this case, the first base station 410 communicates with the terminal 430 as a serving base station of the terminal 430. In this case, the terminal 430 is located at the boundary area of the cell 400. In this case, the signal strengths of the base stations received by the terminal 400 are shown, and the signal strengths of the first base station 410 and the second base station 460 are similar in the vicinity of the cell boundary region.

When the signal strengths of the base stations 410 and 460 are similar, the terminal 430 receives both the signal of the first base station 410 and the signal of the second base station 460. In this case, the signal of the first base station 410 and the signal of the second base station 460 are different from each other. In the present invention, a signal transmission / reception method for transmitting and receiving different signals from different base stations as described above will be referred to as a macro multiplexing technique.

5 is a signal flowchart according to a signal transmission and reception operation in a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 5, a terminal 430, a first base station 410, and a second base station 460 are illustrated.

The terminal 430 stores an active set therein for handover and the like, and the active set includes neighboring base station information with high handover possibility. The active set is stored by the terminal or the base station as described above. In the present invention, a base station for transmitting a signal to the terminal is generally included in the active set.

The terminal 430 communicates with the first base station 410 which is the serving base station of the current terminal, and thus the terminal 430 receives a signal from the first base station 410. In this case, the terminal 430 measures received signal strength of neighboring base stations at intervals of a predetermined period (step 501). The signal strength of the measured base stations is to check whether there is a base station having a signal strength corresponding to the first base station 410, that is, a signal strength similar to that of the first base station 410.

In this case, if the terminal 430 moves from the first base station 410 toward the second base station 460, the terminal 430 moves to the cell boundary region of the first base station 410. In this case, the signal strength of the first base station 410 and the signal strength of the second base station 430 are similar, and the signal strength of the second base station 460 corresponds to the signal strength of the first base station 410. To have.

When the terminal 430 detects that there is a second base station 460 having a signal strength corresponding to the first base station 410 that is the current serving base station, the terminal 430 macro multiplexes to the first base station 410. In operation 503, a macro multiplexing request message is transmitted. In this case, the macro multiplexing request message transmitted by the first base station 410 is a message for requesting the terminal 430 to receive a signal from the second base station 460.

Upon receiving the macro multiplexing request message, the first base station 410 determines whether the second base station 430 is capable of transmitting a signal to the terminal 430, and for this purpose, the first base station 410 receives a second message. The macro multiplexing request message is transmitted to the base station 460 (step 505). The macro multiplexing execution request message transmitted in step 505 is a message for requesting the terminal 430 to receive a signal from the second base station 460, and the first base station 410 includes a second base station together with the macro multiplexing request message. At 460, the first base station 410 transmits resource information allocated to the terminal 230, for example, frequency information, time information, and code information.

Upon receiving the macro multiplexing request message, the second base station 460 checks the resource information and available resource information of the second base station 460 to determine whether there is a resource to be allocated to the terminal 430. As a result of the check, if there is a resource to be allocated to the terminal 430, the resource is allocated to the terminal 430, and the second base station 460 confirms that it is possible to transmit a signal to the terminal 430. In this case, the second base station 460 transmits a macro multiplexing confirmation message to the first base station 410 (step 507).

Upon receiving the macro multiplexing availability confirmation message, the first base station 410 transmits a macro multiplexing performance confirmation message indicating that it is possible to perform macro multiplexing to the second base station 460 (step 509).

In operation 511, the first base station 410 transmits a macro multiplexing permission message to the terminal 430. Alternatively, the terminal 430 directly receives the macro multiplexing permission message from the second base station 460 without receiving the macro multiplexing permission message from the first base station 410 and thus receives the first and second base station 430 and the second base station 460. It may be informed that it is possible to receive a signal.

Accordingly, the second base station 460 transmits a signal to the terminal 430 through the resources allocated to the terminal 430. The first base station 410 also transmits a signal to the terminal 430. In this case, the first base station 410 and the second base station 460 are connected to the terminal from a base station controller (BSC) (not shown) controlling the first base station 410 and the second base station 460. Receives data to be transmitted and transmits it to the terminal 430. Accordingly, the base station controller transmits data to be transmitted to the terminal 430 by dividing the data into the first base station 410 and the second base station 460 so that the first base station 410 and the second base station 460 receive signals including different data. It transmits to the terminal 430. Accordingly, the terminal 430 receives a signal including different types of data through the first base station 410 and the second base station 460 through the received signal of the terminal 430. In addition, the terminal 430 may simultaneously receive different signals from the first base station 410 and the second base station 460 to restore the signals.

6 is a diagram schematically illustrating operations of a base station and a terminal of a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 6, a wireless communication system includes a first base station, a second base station, and a terminal, wherein the first base station includes a first transmitter 601, and the second base station includes a second transmitter 603. The terminal includes a demodulator 605, a joint detector 606, a channel estimator 607, and a decoder 609.

The first transmitter 601 transmits a signal to the terminal through the h1 channel. The second transmitter 603 transmits a signal to the terminal through the h2 channel. At this time, the signals transmitted through each of the h1 channel and the h2 channel are different signals.

The demodulator 605 of the terminal receiving the signals through the h1 and h2 channels demodulates the received signals and outputs the demodulated signals to the channel estimator 607 and the junction detector 606. The channel estimator 607 estimates the channel h1 channel and the h2 channel using the demodulated signal of the demodulator 605 and outputs the channel estimation information to the junction detector 606. Here, the junction detector uses the demodulated signal of the demodulator 605 and the channel estimation information of the channel estimator 607 to transmit the d1 signal transmitted from the first transmitter 601 and the d2 signal transmitted from the second transmitter 603. And the d1 and d2 signals are output to the decoder 609.

Here, the specific operation of the junction detector 606 will be described with reference to FIG. 7 below, and a detailed description thereof will be omitted. The decoder 609 having received d1 and d2 detected by the junction detector decodes the d1 and d2 signals and restores the signals transmitted from each base station. The detected d1 and d2 signals are different from each other. Here, the decoder 609 may also apply a method of configuring one or more variable numbers according to the structure of the encoder of the structure of the transmitter for transmitting the d1 signal or the d2 signal, or the system situation or user setting. Therefore, the above-described method can also be applied to the handover in the wireless communication system even when the handover.

7 is a view schematically showing the structure of a junction detector according to an embodiment of the present invention.

Referring to FIG. 7, the junction detector 606 includes a first multiplier 701, a first determiner 703, a second multiplier 705, an adder 707, a third multiplier 709, and a second plate. Periodic (711).

를 수신 신호에 곱하여 제 1 판정기(703)로 출력한다. 그리고 제 1 판정기(703)는 d2 신호를 판정하며, 이때 판정된 신호는 제 2 곱셈기(705)에 입력된다. In this case, the first multiplier 701 receives channel estimation information for receiving the d2 signal.

Is multiplied by the received signal and output to the first determiner 703. The first determiner 703 determines the d2 signal, and the determined signal is input to the second multiplier 705.

를 제 1 판정기(703)의 출력 신호를 곱하고, 덧셈기(707)로 출력한다. 덧셈기(707)는 제 2 곱셈기(705)의 출력신호를 접합 검출 기(606)의 입력 신호에서 감산한다. 이때 제 2 곱셈기(705)의 출력 신호는

가 되며, 덧셈기(707)는 제 2 곱셈기의 출력신호를 접합 검출기의 입력 신호에서 감산하여 제 3 곱셈기(709)로 출력한다. At this time, the second multiplier 705

Is multiplied by the output signal of the first determiner 703 and output to the adder 707. The adder 707 subtracts the output signal of the second multiplier 705 from the input signal of the junction detector 606. At this time, the output signal of the second multiplier 705 is

The adder 707 subtracts the output signal of the second multiplier from the input signal of the junction detector and outputs the output signal to the third multiplier 709.

을 곱한 후에 제 2 판정기(711)로 출력한다. 여기서 제 2 판정기(711)는 d1 신호를 판정한다. 이에 접합 검출기(606)는 상기 기지국들의 제 1 송신기와 제 2 송신기가 송신한 d1 신호와 d2 신호를 검출한다. 접합 검출기(606)에서는 d2 신호를 먼저 검출하는 것을 도시하였으며, 이때 상기 d2 신호는 신호 세기가 큰 신호이다. 따라서 접합 검출기(606)에서는 신호 세기가 큰 신호를 먼저 검출한다.In this case, the third multiplier 709 is applied to the output signal of the adder 707.

After multiplying by and outputs to the second determiner 711. Here, the second determiner 711 determines the d1 signal. The junction detector 606 detects the d1 signal and the d2 signal transmitted by the first transmitter and the second transmitter of the base stations. The junction detector 606 illustrates the detection of the d2 signal first, wherein the d2 signal is a signal having a large signal strength. Therefore, the junction detector 606 first detects a signal having a large signal strength.

8 is a diagram schematically illustrating a structure of a base station controller and base stations of a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 8, a base station controller 800, a first base station 830, and a second base station 850 are illustrated. Here, the base station controller 800 includes a first encoder 801 and a second encoder 803 for encoding a signal transmitted to each base station. In case of using the two encoders 801 and 803, the decoder of the terminal may include two decoders corresponding to the encoders 801 and 803 to decode the received signal.

Accordingly, the base station controller 800 divides the signals to be transmitted to the terminal and performs encoding. For example, it is assumed that the base station controller 800 has data to be transmitted to the terminal, that is, first data, second data, third data, and fourth data. At this time, the base station controller 800 transmits the first data and the third data through the first encoder 801, and transmits the second data and the fourth data through the second encoder 803. In addition, the base station controller 800 may transmit the first data and the second data through the first encoder 801 and the third data and the fourth data through the second encoder 803. Accordingly, the method of scheduling data to be transmitted to the terminal and inputting the data to the encoders can be variably applied according to the scheduling method set in the base station controller 800.

In addition, assuming that the first base station 830 is a serving base station of the terminal, the second base station 850 is a base station capable of transmitting and receiving signals with the terminal and according to an embodiment of the present invention to the terminal together with the first base station 830. Send the signal.

Accordingly, the encoders 801 and 803 of the base station controller 800 encode different data, and the signal encoded by the first encoder 801 is output to the first base station 830. The signal encoded by the second encoder 803 is output to the second base station 850.

Accordingly, the modulator 831 of the first base station 830 receiving the signal encoded by the first encoder 801 modulates the encoded signal and outputs the encoded signal to the transmission radio processor 833. The transmit radio processor 833 wirelessly processes the signal modulated by the modulator 831 and transmits the signal to the terminal through an antenna.

The modulator 851 of the second base station 850 receiving the signal encoded by the second encoder 803 modulates the encoded signal and outputs the encoded signal to the transmission radio processor 853. The transmit radio processor 853 wirelessly processes the signal modulated by the modulator 851 and transmits the signal to the terminal through an antenna. The signal transmitted from the first base station 830 is a d1 signal, and the signal transmitted from the second base station 850 is a d2 signal.

9 is a diagram schematically illustrating a structure of a base station controller and base stations of a wireless communication system according to another embodiment of the present invention.

Referring to FIG. 9, a base station controller 900, a first base station 930, and a second base station 950 are shown. Here, the base station controller 900 includes an encoder 901 for encoding a signal transmitted to each base station.

The base station controller 900 encodes the signal to be transmitted to the terminal and transmits the divided signal to the base stations 930 and 950. For example, it is assumed that the base station controller 900 has data to be transmitted to the terminal, for example, first data, second data, third data, and fourth data. At this time, the base station controller 800 transmits the first data and the third data to the first base station 930 after encoding through the encoder 901, and transmits the second data and the fourth data to the second base station 950. To be sent). In addition, the base station controller 900 transmits the encoded first data and the second data to the first base station 930 through the encoder 901, and transmits the third data and the fourth data to the second base station 950. You can also send. Accordingly, the method of scheduling data to be transmitted to the terminal and transmitting the data to the base stations 930 and 950 can be variably applied according to the scheduling method set in the base station controller 900 as described with reference to FIG. 8.

In addition, assuming that the first base station 930 is a serving base station of the terminal, the second base station 950 is a base station capable of transmitting and receiving a signal with the terminal and together with the first base station 930 according to an embodiment of the present invention. Send the signal.

Accordingly, the signal encoded by the encoder 901 of the base station controller 900 is input to the first base station 930 and the second encoder 930.

Accordingly, the modulator 931 of the first base station 930 receiving the signal encoded by the encoder 901 modulates the encoded signal and outputs the modulated signal to the transmission radio processor 933. The transmission radio processor 933 wirelessly processes the signal modulated by the modulator 931 and transmits the signal to the terminal through an antenna.

The modulator 951 of the second base station 950 which receives the signal encoded by the encoder 901 modulates the encoded signal and outputs the modulated signal to the transmit radio processor 953. The transmission radio processor 933 wirelessly processes the signal modulated by the modulator 931 and transmits the signal to the terminal through an antenna.

As described above, the terminal receives the d1 signal output from each modulator and the d2 signal output from the second modulator, and the d1 signal and the d2 signal use different signals.

8 and 9, the number of encoders of the base station controller can be extended or reduced and used. As the number of encoders increases, the transmission efficiency also increases. Thus, although the base station controller includes an encoder and performs encoding, the base station controller performs scheduling of data to each base station and each base station can operate including the encoder.

In the present invention, the terminal has been described focusing on receiving signals from two base stations. However, the terminal can also receive signals from two or more base stations, and in the present invention, the terminal can receive signals, in particular, different signals through a plurality of serving base stations, thereby improving the reception performance of the terminal. In other words, this method makes it possible to transmit about twice as much data to the terminal as compared to the conventional signal reception method. In this case, it is possible for the receiver of the terminal to perform interference cancellation, and when using a maximum likelihood (ML) receiver, the transmission of the above double data is guaranteed.

While the present invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not limited to the disclosed embodiments, but is capable of various modifications within the scope of the invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention provides a base station having a signal strength corresponding to a serving base station in a wireless communication system, and the serving base station transmits different signals to the terminal so that the terminal transmits and receives signals from two or more base stations. It has the advantage of being able to. In addition, it is possible to efficiently use channel resources by transmitting and receiving signals with the base stations of the cell boundary region using the above method. Furthermore, by transmitting different data from a plurality of base stations to the terminal, the data transmission efficiency is improved.

Claims (30)

In the signal transmission and reception method of a terminal that can communicate with at least two base stations, When a second base station having a signal strength corresponding to the signal strength of the first base station communicating with the terminal is detected, requesting signal transmission to the second base station through the first base station; Receiving notification that the signal transmission is possible from the second base station through the first base station in response to the signal transmission request; And receiving a different signal from each of the first and second base stations. The method of claim 1, And the first base station is a serving base station of the terminal. The method of claim 1, wherein the request for transmitting the signal comprises: And detecting the second base station having a signal strength corresponding to the signal strength of the first base station by measuring signal strengths of adjacent base stations at regular intervals. delete The method of claim 1, And recovering a signal received from each of the first and second base stations. The method of claim 5, wherein the restoring process, Demodulating a signal received from each of the first and second base stations; Estimating a channel based on the demodulated signal; Detecting signals of each of the first and second base stations from the demodulated signal using channel information obtained through the channel estimation; And recovering the signals transmitted by the first and second base stations by decoding the detected signals of each of the first and second base stations. The method according to claim 6, And detecting the signal having the largest signal strength among the signals of the first and second base stations when the signal is detected. A signal transmission and reception method in a wireless communication system including at least two base stations and a terminal capable of communicating with the base stations, Measuring, by the terminal, signal strength of neighboring base stations; Transmitting a signal transmission request message to the first base station when the second base station having a signal strength corresponding to the signal strength of the first base station communicating with the terminal is detected as a result of the measurement; Transmitting, by the first base station receiving the signal transmission request message, a signal transmission possible confirmation message to the second base station to confirm whether the signal transmission to the terminal is possible; If the second base station transmits a signal to the terminal, transmitting a signal transmittable message to the first base station in response to the signal transmission possible confirmation message; Transmitting, by the first base station receiving the signal transmission possible message, a signal transmission permission message to the terminal; And receiving, by the terminal receiving the signal transmission permission message, a different signal from each of the first and second base stations and recovering the received respective signals. 9. The method of claim 8, And the first base station is a serving base station of the terminal. delete The method of claim 8, wherein the restoring process comprises: Demodulating, by the terminal, a signal received from each of the first and second base stations; Estimating a channel based on the demodulated signal; Detecting signals of each of the first and second base stations from the demodulated signal using channel information obtained through the channel estimation; And recovering the signals transmitted by the first and second base stations by decoding the detected signals of each of the first and second base stations. 12. The method of claim 11, And detecting the signal having the largest signal strength among the signals of the first and second base stations when the signal is detected. 9. The method of claim 8, And a signal received from each of the first and second base stations is a signal transmitted from a base station controller. 14. The method of claim 13, The base station controller transmits and receives a signal transmitted to the first base station and a signal transmitted to the second base station differently scheduled. A signal transmitting and receiving method in a wireless communication system including at least two base stations and a terminal capable of communicating with the base station, Receiving, by the first base station, a signal transmission request message from the terminal; Transmitting, by the first base station receiving the signal transmission request message, a signal transmission possible confirmation message to the second base station to confirm whether the signal transmission to the terminal is possible; When the second base station transmits a signal to the terminal, transmitting a signal transmission capable message to the terminal in response to the signal transmission confirmation message; And transmitting a different signal from each of the first and second base stations to the terminal. 16. The method of claim 15, And the first base station is a serving base station of the terminal. In the wireless communication system comprising at least two or more base stations and a terminal capable of communicating with the base station, any one of the base stations in a method for transmitting and receiving a signal, Receiving a signal transmission possible confirmation message from the terminal through the first base station, checking whether the signal transmission to the terminal is possible; Transmitting a signal transmission possible message to the terminal through the first base station in response to the signal transmission possible confirmation message if the signal transmission to the terminal is possible; And transmitting a different signal to each of the first and second base stations. In the signal transmission and reception method of a terminal that can communicate with at least two base stations, Measuring signal strength of neighboring base stations; Detecting a second base station having a signal strength corresponding to a signal strength of a first base station communicating with the terminal based on the measurement result; Detecting a second base station, transmitting a signal transmission request message to the second base station through the first base station; Receiving a signal transmission permission message from the second base station through the first base station in response to the signal transmission request message, receiving a different signal from each of the first and second base stations, and restoring each received signal; Signal transmission and reception method of a terminal comprising a process. 19. The method of claim 18, And the first base station is a serving base station of the terminal. delete The method of claim 18, wherein the restoring process, Demodulating a signal received from each of the first and second base stations; Estimating a channel based on the demodulated signal; Detecting signals of each of the first and second base stations from the demodulated signal using channel information obtained through the channel estimation; And recovering the signals transmitted by the first and second base stations by decoding the detected signals of each of the first and second base stations. 22. The method of claim 21, And detecting the signal having the greatest signal strength among the signals of the first and second base stations when the signal is detected. An apparatus for transmitting and receiving a signal in a wireless communication system including at least two base stations and a terminal capable of communicating with the base station, Detecting a second base station having a signal strength corresponding to the signal strength of the first base station that is currently performing communication, and confirms whether the second base station can transmit a signal through the first base station, the second base station signal A terminal for receiving and restoring a different signal from each of the first and second base stations when it is determined that transmission is possible; The first base station for checking whether the second base station can transmit a signal to the terminal at the request of the terminal, notifying the terminal of the confirmation result, and transmitting the corresponding signal to the terminal; If the signal transmission to the terminal is possible after receiving a request for confirmation that the signal transmission is possible from the first base station to the terminal, the terminal transmits the signal to the terminal after notifying that the signal transmission is possible. And a second base station for transmitting. 24. The method of claim 23, And the first base station is a serving base station of the terminal. 24. The method of claim 23, The terminal detects the second base station having a signal strength corresponding to the signal strength of the first base station by measuring the signal strength of the adjacent base stations at regular intervals. 24. The method of claim 23, And a base station controller for providing the corresponding signal to be transmitted to the terminal to the first and second base stations, respectively. The method of claim 26, And the base station controller transmits the corresponding signal transmitted to the first base station and the corresponding signal transmitted to the second base station differently. The method of claim 26, And the base station controller includes an encoder for encoding a corresponding signal to be transmitted to each of the first and second base stations. The method of claim 27, wherein the terminal, A demodulator for demodulating a signal received from the first base station and a signal received from the second base station; A channel estimator for estimating a channel based on the demodulated signal; A junction detector for detecting a signal of each of the first and second base stations from the demodulated signal using the channel information obtained through the channel estimation; And a decoder which decodes the detected signals of each of the first and second base stations and restores the signals transmitted by the first and second base stations. 24. The method of claim 23, The junction detector detects the signal having the largest signal strength among the signals of the first and second base stations.

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