WO2013042850A1

WO2013042850A1 - Repeater, frame structure for the repeater, and method for allocating frequencies to the repeater using same

Info

Publication number: WO2013042850A1
Application number: PCT/KR2012/001866
Authority: WO
Inventors: 이정륜; 허근행; 신윤재
Original assignee: 중앙대학교 산학협력단
Priority date: 2011-09-20
Filing date: 2012-03-15
Publication date: 2013-03-28
Also published as: KR20130030872A; KR101264026B1

Abstract

Disclosed in the present invention are a repeater, a frame structure for the repeater, and a method for allocating frequencies to the repeater using same. The repeater of the present invention comprises: a transmitting unit which transmits information regarding a frequency band, in which a frequency indicator signal is to be received, to a terminal connected to the repeater at a downlink subframe of the repeater; and a receiving unit which receives frequency indicator signals from the terminal connected to the repeater and terminals connected to one or more other repeaters located adjacent to the repeater at an uplink subframe of the repeater, wherein the terminal connected to the repeater can radiate the frequency indicator signal through the frequency band received from the repeater. According to the present invention, without additional network entry procedures between repeaters, signals can be transmitted between the repeaters, and communication performance can be improved when allocating frequencies to the repeaters using said feature when interference occurs between the repeaters. Further, by allocating more frequencies to a repeater having priority for data transmission, resources can be efficiently used.

Description

Repeater, frame structure of repeater, frequency allocation method of repeater using the same

Embodiments of the present invention relate to a frame structure of a repeater, a repeater for allocating a frequency using the repeater and a frequency allocating method for the repeater, and more particularly, to transmit and receive information without going through a separate network entry procedure using a terminal. A repeater frame structure, a repeater for allocating a frequency using the frame structure and a frequency allocation method for enabling the present invention.

In the context of the recent progress in standardization of 4G mobile communication, inter-cell interference including repeaters is a major issue in this field. Interference can occur between the end-to-end links of the repeater present in the cell.

1 is a view showing a schematic configuration of a wireless communication system according to an embodiment of the present invention.

Referring to FIG. 1, the base station 110, the first repeater 121, and the first terminal 131 are linked to each other to perform communication, and the base station 110, the second repeater 123, and the second terminal ( 133 are linked to each other to perform communication.

Here, when the first terminal 131 communicating with the first repeater 121 and the second terminal 133 communicating with the second repeater 123 use the same frequency band, the first repeater 121 and the second Interference may occur due to the proximity of the repeater 123.

In order to avoid such interference, a scheme for allocating different frequency bands to each of the

repeaters

121 and 123 has been proposed.

2 is a diagram illustrating a frame structure used for communication between a repeater and a terminal.

In case of 4G mobile communication, the frame structure of the repeater includes a downlink subframe section, which is a downlink section in which the repeater transmits data to the terminal, and a terminal transmitting data to the repeater, as shown in FIG. It is divided into an uplink subframe period. Such a frame structure is disclosed in published 2010-0099847.

The repeater operates in transmit mode in the downlink subframe and in receive mode in the uplink subframe. On the other hand, the UE operates in the transmission mode in the downlink subframe and the reception mode in the downlink subframe.

Since the

repeaters

121 and 123 connected to the base station 110 are synchronized with the base station 110, time zones of the downlink subframe and the uplink subframe are similarly allocated. Therefore, the

repeaters

121 and 123 connected to the base station 110 in the cell transmit or receive data at substantially the same time according to the time divided into the downlink subframe and the uplink subframe. For this reason, it is impossible for the relay to communicate with another relay without going through a separate network entry procedure.

However, in order to allocate the frequency band, information on the frequency band used by the first repeater 121 should be transmitted to the second repeater 123. To this end, the first repeater 121 must transmit the frequency band information to the second repeater 123 through the network entry procedure, release the network connection, and be connected to the base station 110 via the network entry procedure again.

However, a complicated procedure for transmitting data having a small amount of information, such as information on a frequency band used by a repeater, has a problem of degrading a service quality of a terminal connected to the first repeater 121.

In order to solve the problems of the prior art as described above, in the present invention, a repeater and a frequency for allocating a frequency using a frame structure and a frame structure of the repeater to transmit and receive information without undergoing a separate network entry procedure I would like to propose an allocation method.

Other objects of the present invention may be derived by those skilled in the art through the following examples.

According to a preferred embodiment of the present invention to achieve the above object, in the repeater, a transmission for transmitting information on the frequency band to receive the frequency indicator signal from the downlink subframe of the repeater to the terminal connected to the repeater part; And a receiver configured to receive frequency indicator signals from a terminal connected to the repeater and terminals connected to at least one or more other repeaters around the repeater in an uplink subframe of the repeater, wherein the terminal connected to the repeater includes: A repeater is provided that emits the frequency indicator signal through the frequency band received from the receiver.

The receiving unit configures one repeater group for repeaters whose signal strength of the repeater is greater than or equal to a preset threshold value, and receives frequency indicator signals from terminals connected to the repeaters belonging to the repeater group. Can be.

The receiver may set an energy detection interval at predetermined intervals in the uplink subframe, and receive the frequency indicator signals in the energy detection interval.

The frequency band reset unit for resetting the frequency band using the frequency indicator signals received by the repeater is located above the received frequency band of the first frequency indicator signal of the repeater within the energy detection section, A frequency band in which the second frequency indicator signal located at the nearest position is received is selected, and the first frequency indicator signal in the energy detection section is located below the received frequency band, and is located in the nearest position. A frequency band in which a third frequency indicator signal is received is selected, a frequency band in which the first frequency indicator signal is received, a frequency band in which the second frequency indicator signal is received, and a frequency band in which the third frequency indicator signal is received. Frequency band for resetting the frequency band at which the first frequency indicator signal is received Reset may further include a.

The frequency band at which the second frequency indicator signal is received and the frequency band at which the third frequency indicator signal is received may be reset through a repeater connected to a terminal that transmits each frequency indicator signal.

A frequency band for receiving the reset first frequency indicator signal from the intermediate position of the frequency band for receiving the reset second frequency indicator signal and the frequency band for receiving the reset first frequency indicator signal and the resetting The apparatus may further include a frequency allocator configured to allocate, to the repeater, a frequency resource up to an intermediate position of a frequency band in which the set third frequency indicator signal is to be received.

When a priority is given to data transmitted from the repeater to the terminal connected to the repeater, the transmitter transmits at least information on a frequency band for receiving the frequency indicator signal to the terminal connected to the repeater through the downlink subframe. You can send more than one.

According to another embodiment of the present invention, a repeater comprising: transmitting information on a frequency band for receiving a frequency indicator signal to a terminal connected to the repeater through a downlink subframe of the repeater; Receiving frequency indicator signals from a terminal connected to the repeater and terminals connected to at least one or more other repeaters around the repeater through an uplink subframe of the repeater; And resetting the frequency band by using the frequency indicator signals received by the repeater, wherein the terminal connected to the repeater emits the frequency indicator signal through the frequency band received from the repeater. A frequency allocation method of a repeater is provided.

According to another embodiment of the present invention, the information on the frequency band to receive the frequency indicator signal from the downlink subframe of the repeater to the terminal connected to the repeater, and the energy detection interval set in the uplink subframe of the repeater A repeater for receiving frequency indicator signals from terminals connected to the repeater and terminals connected to at least one or more other repeaters around the repeater; And a terminal for radiating the frequency indicator signal through the frequency band received from the repeater.

According to another embodiment of the present invention, in a frame structure of a repeater, a downlink subframe which is a section in which information on a frequency band from which the frequency indicator signal is to be received is transmitted to a terminal connected to the repeater; And an uplink subframe including an energy detection section for receiving a frequency indicator signal emitted from terminals connected to the terminal and at least one or more other repeaters around the repeater through the frequency band. The frame structure of is provided.

According to the present invention, it is possible to transmit a relay signal without going through a separate network entry procedure, and improve communication performance when a frequency is allocated to the repeater using the relay interference when it occurs.

In addition, more frequencies can be allocated to the repeaters with priority for data transmission, thus enabling efficient use of resources.

3 is a diagram illustrating a frame structure of a repeater according to an embodiment of the present invention.

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

5 is a view for explaining a transmission and reception technique using a repeater frame structure of the present invention.

6 is a diagram illustrating a detailed configuration of a repeater according to an embodiment of the present invention.

FIG. 7 is a diagram illustrating an example of an energy detection interval set in an uplink subframe at predetermined periods according to an embodiment of the present invention.

8 is a diagram illustrating a process of resetting a frequency indicator signal according to an embodiment of the present invention.

9 is a diagram illustrating a process of allocating frequency resources according to an embodiment of the present invention.

10 is a view for explaining a repeater group according to an embodiment of the present invention.

FIG. 11 is a diagram illustrating frequency resources allocated when additionally receiving a frequency indicator signal according to an embodiment of the present invention. FIG.

12 is a diagram illustrating an example of frequency resource allocation in consideration of link yield between a base station and a relay period according to an embodiment of the present invention.

13 is a flowchart illustrating the overall flow of the frequency allocation method according to an embodiment of the present invention.

14 is a view for comparing and evaluating the performance of the frequency allocation method according to an embodiment of the present invention.

[Description of the code]

110: base station 121: first repeater

123: second repeater 131: first terminal

133: second terminal

400: wireless communication system 410: base station

421: first repeater 423: second repeater

431: first terminal 433: second terminal

600: repeater 610: transmission unit

620: receiver 630: frequency band reset unit

640: frequency allocation unit 650: downlink frequency allocation unit

801: frequency band in which the first frequency indicator signal was received

802: frequency band at which the second frequency indicator signal was received

803: Frequency band in which the third frequency indicator signal was received

811: frequency band in which the first frequency indicator signal is to be received

812: Frequency band in which the second frequency indicator signal is to be received

813: Frequency band in which the third frequency indicator signal is to be received

1001: first repeater 1002: second repeater

1003: third repeater 1004: fourth repeater

1101: frequency band in which the existing frequency indicator signal is received

1103: frequency band in which the frequency indicator signal is additionally received

As the invention allows for various changes and numerous embodiments, particular embodiments will be illustrated in the drawings and described in detail in the written description. However, this is not intended to limit the present invention to specific embodiments, it should be understood to include all modifications, equivalents, and substitutes included in the spirit and scope of the present invention. In describing the drawings, similar reference numerals are used for similar elements.

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

First, a frame structure of a repeater for transmitting and receiving relay period information using a terminal without going through a relay network entry procedure and a transmission / reception scheme using the same will be described.

FIG. 3 (a) is a diagram illustrating an energy detection interval set in an uplink subframe of a repeater, and FIG. 3 (b) is an energy set in a repeater frame structure of a non-transparent mode defined in 802.16j or 802.16m. It is a figure which shows an example of a detection section.

The energy detection section is a section for receiving a frequency indicator signal transmitted by the terminal, the terminal referred to herein includes not only a terminal connected to the repeater itself but also a terminal connected to another repeater located adjacent to the repeater.

According to the present invention, the energy detection section is used for the purpose of receiving the frequency indicator signal from the terminal and may not receive other data in this section.

Here, the frequency indicator signal is information related to frequency resources used by the repeater to communicate with the terminal. When interference occurs in several relay periods, the frequency indicator signal may use the frequency indicator as a reference signal for frequency allocation to each repeater. no.

According to an embodiment of the present invention, when the terminal receives frequency band information for transmitting the frequency indicator signal from the repeater connected to the terminal, the terminal radiates the frequency indicator signal to the surroundings through the frequency band.

Subsequently, the repeaters receiving the frequency indicator signal in the energy detection section determine the meaning of the signal by the presence of the signal and the position of the frequency at which the frequency indicator signal is transmitted without coding / decoding the frequency indicator signal. This will be described with reference to FIGS. 4 and 5 for a more detailed description.

4 is a diagram showing a wireless communication system according to an embodiment of the present invention, Figure 5 is a view for explaining a transmission and reception technique using a repeater frame structure of the present invention.

The wireless communication system 400 of FIG. 4 includes a base station 410, a first repeater 421, a second repeater 423, a first terminal 431, and a second terminal 433. According to an embodiment of the present invention, the

repeaters

421 and 423 may be mobile repeaters.

The first repeater 421 transmits information on the frequency band to which the frequency indicator signal of the first repeater 421 should be transmitted to the first terminal 431 connected to the downlink subframe. In addition, the second repeater 423 transmits information on a frequency band to which the frequency indicator signal of the second repeater 423 is to be transmitted to the second terminal 433 connected to the downlink subframe.

Subsequently, the first terminal 431 radiates the frequency indicator signal of the first repeater 421 to the frequency band received from the first repeater 421 in the energy detection interval of the uplink subframe of the first repeater 421. The second terminal 433 radiates the frequency indicator signal of the second repeater 423 to the frequency band received from the second repeater 423 in the energy detection interval of the uplink subframe of the second repeater 423.

At this time, the first repeater 421 is the frequency indicator signal of the first repeater 421 radiated by the first terminal 431 in the energy detection interval of the uplink subframe of the first repeater 421 and the second terminal 433. The frequency indicator signal of the radiated second repeater 423 is received, and the second repeater 423 is also the frequency indicator signal of the first repeater 421 radiated by the first terminal 431 and the second terminal 433. The radiated frequency indicator signal of the second repeater 423 is received.

Accordingly, the first repeater 421 recognizes the frequency indicator signal of the second repeater 423 through the frequency indicator signal emitted by the second terminal 433 without undergoing a direct network entry procedure with the second repeater 423. can do.

According to an embodiment of the present invention, in order to solve the relay period interference, the frequency is divided by using the frequency indicator signal of another repeater received in the energy detection section of the uplink subframe of the repeater, and the divided frequency resources in each repeater Can be assigned. Hereinafter, a repeater for allocating a frequency for mitigating repeater interference will be described with reference to FIG. 6.

Referring to FIG. 6, the repeater 600 according to an embodiment of the present invention includes a transmitter 610, a receiver 620, a frequency band reset unit 630, and a frequency allocator 640. Hereinafter, the function of each component will be described in detail.

The transmitter 610 transmits information on a frequency band at which the frequency indicator signal of the repeater 600 should be received to the terminal connected to the repeater 600 through the downlink subframe of the repeater 600.

The receiver 620 receives a frequency indicator signal from at least one terminal connected to the terminal connected to the repeater 600 and another repeater near the repeater 600 through the uplink subframe of the repeater 600.

In this case, the terminals emit a frequency indicator signal through a frequency band received from a repeater connected to each terminal, and the receiver 620 receives the frequency indicator signal.

According to an embodiment of the present invention, the energy detection interval set in the uplink subframe may be set at each preset period. This is because when the energy detection interval is set in every uplink subframe of each cycle and a frequency indicator signal is received from the terminals, it may cause an inefficiency of radio resource usage.

Referring to FIG. 7, the energy detection interval is set in the uplink subframe every T period, and thus the receiver 620 receives the frequency indicator signal from the neighboring terminals every T period.

Referring back to FIG. 6, the frequency band reset unit 630 resets frequency band information for receiving the frequency indicator signal using the frequency indicator signals received by the receiver 620.

8 is a diagram illustrating a process of resetting frequency band information according to an embodiment of the present invention.

In Fig. 8 (a)

Denotes a frequency band 801 in which the first frequency indicator signal of the i-th repeater 600 in a specific group in the n-th period detected in the energy detection interval is received.

Is

A frequency band 802 in which a second frequency indicator signal located higher and located in the nearest position is received;

Is

A third frequency indicator signal located lower and located at the nearest position represents the received frequency band 803.

The frequency band reset unit 630 is configured to reset the frequency band 801 in which the first frequency indicator signal was received, the frequency band 802 in which the second frequency indicator signal was received, and the frequency in which the third frequency indicator signal was received. Band 803 is first selected. This is because the frequency resource allocated to the repeater 600 is a frequency resource between the frequency band 802 in which the second frequency indicator signal is received and the frequency band 803 in which the third frequency indicator signal is received.

The frequency band reset unit 630 may include a frequency band 801 in which the first frequency indicator signal is received, a frequency band 802 in which the second frequency indicator signal is received, and a frequency band 803 in which the third frequency indicator signal is received. The frequency band 811 in which the first frequency indicator signal is received in the n + 1 th period is reset using.

The frequency band 811 in which the first frequency indicator signal is to be received in the n + 1 th period may be reset using the following equation.

Equation 1

here,

Denotes a frequency band 801 in which the first frequency indicator signal of the repeater 600 is received in the nth period within the energy detection interval,

Is a frequency band 802 in which the second frequency indicator signal is received in the nth period within the energy detection interval,

Denotes a frequency band 803 in which the third frequency indicator signal is received in the nth period within the energy detection interval,

Is a convergence variable,

Denotes a frequency band 811 in which the first frequency indicator signal of the repeater 600 is to be received in the reset n + 1 th period.

Referring to FIG. 8B, the first frequency indicator signal may be received such that the second frequency indicator signal has an intermediate value between the frequency band 802 in which the second frequency indicator signal is received and the frequency band 803 in which the third frequency indicator signal is received. By resetting the frequency band 801, frequency resources can be allocated to each repeater fairly.

According to an embodiment of the present invention, the frequency band 802 in which the second frequency indicator signal is received and the frequency band 803 in which the third frequency indicator signal is received are connected through a repeater connected to a terminal that transmits each frequency indicator signal. Will be reset.

The frequency allocator 640 may include a reset third frequency indicator signal from an intermediate position of the frequency band 812 in which the reset second frequency indicator signal is to be received and the frequency band 811 in which the reset first frequency indicator signal is to be received. The frequency resource up to the intermediate position of the frequency band 813 to be received and the frequency band 811 where the reset first frequency indicator signal is to be received is allocated to the repeater 600.

If there are two frequency indicator signals received by the receiver 620, that is, only the second frequency indicator signal or the third frequency indicator signal is received, the frequency allocator 640 divides the frequency resources in half and repeats the repeater ( 600).

Referring to FIG. 9, the frequency resource allocated to the repeater 600 is

from

It can be confirmed that the frequency band up to.

Denotes an intermediate position between the frequency band 812 where the reset second frequency indicator signal is to be received and the frequency band 811 where the first frequency indicator signal is to be received;

Denotes an intermediate position between the frequency band 811 in which the first frequency indicator signal is to be received and the frequency band 813 in which the third frequency indicator signal is to be received.

According to an embodiment of the present invention, all repeaters in a cell may not exchange frequency indicator signals with each other by using a terminal connected to each repeater. In other words, even if the repeaters are not far apart from each other and cause limited interference, when the limited frequency resources are divided and used, if the repeaters in the cell increase, the width of the frequency band that one repeater can use may decrease, and thus communication performance may decrease. have.

Therefore, the receiver 620 may receive the frequency indicator signal from the terminal connected to the other repeater only when the strength of the signal received from the other repeater is greater than or equal to a preset threshold value.

That is, one repeater group may be configured for repeaters whose strength of the signal transmitted from the repeater 600 of the repeater 600 is greater than or equal to a preset threshold value, and may receive a frequency indicator signal from terminals belonging thereto.

Referring to FIG. 10, the first repeater 1001 and the second repeater 1002 constitute a group A, and the second repeater 1002, the third repeater 1003, and the fourth repeater 1004 refer to the group B. FIG. Configure.

Therefore, the second repeater 1002 is interfered by the signal transmitted from the first repeater 1001, but the third repeater 1003 and the fourth repeater 1004 are not interfered with. That is, even if the first repeater 1001, the third repeater 1003, and the fourth repeater 1004 use overlapping frequency resources for communication with the terminal, they do not receive interference.

Therefore, the frequency indicator signals are exchanged with each other through terminals connected to the first relay 1001 and the second relay period 1002 belonging to the group A, and the second relay 1002 and the third repeater 1003 belonging to the group B. And terminals connected to the fourth repeater 1004.

In this way, when a frequency resource is allocated by exchanging frequency indicator signals in a relay period within a group and assigning frequency resources, interference does not occur even when terminals connected to other repeaters in the group use the same frequency band. Therefore, since the number of total frequency resources is divided according to the number of repeaters included in the group, not the number of repeaters included in the cell, the overall performance of the entire wireless communication system can be expected.

According to an embodiment of the present invention, when the data transmitted from the repeater 600 to the terminal has a priority and thus needs to allocate more frequency resources, the transmitter 610 transmits the downlink subframe of the repeater 600. Information on a frequency band at which the frequency indicator signal of the repeater 600 should be received may be transmitted to at least two terminals connected to the repeater 600.

In this case, the receiver 620 receives the frequency indicator signal from the terminal in two or more frequency bands, and thus the frequency resource allocated by the repeater 600 is expanded.

When the repeater 600 transmits a frequency band to receive a frequency indicator signal additionally to the terminal in order to additionally allocate frequency resources, the repeater 600 receives the frequency indicator signal as shown in FIG.

Referring to FIG. 11A, an additional frequency indicator signal and an additional frequency indicator signal for extension of frequency resources are received from the terminal connected to the repeater 600 in the energy detection interval.

Accordingly, the frequency allocator 640 allocates frequency resources based on the frequency band 1101 in which the existing frequency indicator signal is received and the frequency band 1103 in which the frequency indicator signal is received, and the repeater 600. In this case, all the allocated frequency resources can be used based on the frequency band 1101 in which the existing frequency indicator signal is received and the frequency band 1103 in which the frequency indicator signal is received, thereby extending the allocated frequency resources.

Referring to FIG. 11 (b), it can be seen that the frequency resource allocated to the repeater 600 is expanded due to the addition of the frequency indicator signal.

In the case of allocating a frequency resource to the repeater 600 according to the present invention, the interference from the neighboring repeater is reduced, thus increasing the yield between the repeater 600 and the terminal. However, even if the link yield between the repeater 600 and the terminal is increased, if the yield between the base station and the repeater 600 is low, the yield of the terminal is adapted to the yield between the base station and the repeater 600.

Therefore, according to an embodiment of the present invention, the downlink frequency allocator 650 repeats 600 when an imbalance occurs in the link yield between the base station and the repeater 600 and the repeater 600 and the terminal link. The frequency band connected to the repeater may be allocated in consideration of the frequency resources allocated to the base station and the yield between the base station and the repeater 600.

12 (a) is a view showing the link yield between the base station and the repeater 600, Figure 12 (b) is a view showing the link yield between the repeater 600 and the terminal, Figure 12 (c) is a base station, the repeater And a total link yield between terminals.

As shown in FIG. 12, even if there is a section in which the link yield between the repeater 600 and the terminal is greater than the link yield between the base station and the repeater 600, if the link yield between the base station and the repeater 600 is low, the terminal may be a repeater 600. Since the transmission is received from the base station as can be seen that the yield of the terminal is matched to the link yield between the base station and the repeater 600.

Accordingly, in this section, the downlink frequency allocation unit 650 calculates the required frequency band based on the SINR value of the signal transmitted from the base station. Thereafter, when allocating the frequency band in the downlink, the frequency band allocated to the terminal by the repeater 600 is allocated according to the link yield between the base station and the repeater. Thus, the same yield can be achieved using fewer frequency bands. In addition, the other terminal using the same frequency band can be expected to improve the overall cell yield because the interference is reduced and the yield is increased.

13 is a flowchart illustrating the overall flow of the frequency allocation method according to an embodiment of the present invention. Hereinafter, a process performed at each step will be described with reference to FIG. 13.

Referring to FIG. 13, in step S1300, information on a frequency band in which a frequency indicator signal is to be received is transmitted to a terminal connected to the repeater 600 through a downlink subframe of the repeater 600.

Subsequently, in step S1310, a frequency indicator signal is received from a terminal connected to the repeater 600 and terminals connected to other repeaters around the repeater 600 through an uplink subframe of the repeater 600.

In this case, in step S1310, the signal sent by the peripheral repeater of the repeater 600 is configured as a repeater group for repeaters having a preset threshold value or more, and a frequency indicator signal from terminals connected to the repeaters belonging to the repeater group. Can listen.

In step S1320, the frequency band in which the repeater 600 first frequency indicator signal is received is reset using the frequency indicator signals received by the repeater 600.

In operation S1320, first, a frequency band in which the second frequency indicator signal located at a position closest to the first frequency indicator signal of the repeater 600 is positioned higher than the received frequency band is selected, and the first frequency indicator is selected. The frequency band at which the signal is located below the received frequency band and located at the closest position selects the frequency band at which the signal is received.

Thereafter, the frequency band where the first frequency indicator signal is received is determined using the frequency band in which the first frequency indicator signal is received, the frequency band in which the second frequency indicator signal is received, and the frequency band in which the third frequency indicator signal is received. Set it.

Subsequently, in step S1330, a frequency resource is allocated to the repeater 600 using the reset frequency band. More specifically, the frequency band to which the reset first frequency indicator signal is received in the repeater 600 and the frequency band and third in which the reset second frequency indicator signal is received through the repeater connected to the terminal that has transmitted each frequency indicator signal are received. A frequency resource is allocated to the repeater 600 using the frequency band in which the frequency indicator signal is received.

Finally, in step S1340, the frequency band is allocated to the terminal connected to the repeater 600 in consideration of the frequency resources allocated to the repeater and the link yield between the base station and the repeater 600.

The embodiments of the frequency allocation method according to the present invention have been described so far, and the structure of the repeater frame structure and the repeater described above with reference to FIGS. 3 to 12 may be applied to the present embodiment as it is. Detailed description thereof will be omitted.

Referring to FIG. 14 (a), it can be seen that the graph on the right shows a significant performance improvement in terms of frequency efficiency when the frequency allocation method of the present invention is applied.

Referring to FIG. 14B, when the frequency allocation method of the present invention is applied, as the number of repeaters in a cell increases, a difference in yield increase of the entire cell may be seen, and communication performance may also be improved.

In addition, embodiments of the present invention can be implemented in the form of program instructions that can be executed by various computer means may be recorded on a computer readable medium. The computer readable medium may include program instructions, data files, data structures, etc. alone or in combination. Program instructions recorded on the media may be those specially designed and constructed for the purposes of the present invention, or they may be of the kind well-known and available to those having skill in the computer software arts. Examples of computer-readable recording media include magnetic media such as hard disks, floppy disks, and magnetic tape, optical media such as CD-ROMs, DVDs, and magnetic disks, such as floppy disks. Examples of program instructions such as magneto-optical, ROM, RAM, flash memory, etc. may be executed by a computer using an interpreter as well as machine code such as produced by a compiler. Contains high-level language codes. The hardware device described above may be configured to operate as at least one software module to perform the operations of one embodiment of the present invention, and vice versa.

In the present invention as described above has been described by the specific embodiments, such as specific components and limited embodiments and drawings, but this is provided to help a more general understanding of the present invention, the present invention is not limited to the above embodiments. For those skilled in the art, various modifications and variations are possible from these descriptions. Therefore, the spirit of the present invention should not be limited to the described embodiments, and all the things that are equivalent to or equivalent to the claims as well as the following claims will belong to the scope of the present invention. .

Claims

In the repeater,

A transmitter for transmitting information on a frequency band in which a frequency indicator signal is to be received from a downlink subframe of the repeater to a terminal connected to the repeater; And

In the uplink sub-frame of the repeater includes a receiver for receiving frequency indicator signals from the terminal connected to the repeater and the terminal connected to at least one or more other repeaters around the repeater,

And the terminal connected to the repeater emits the frequency indicator signal through the frequency band received from the repeater.
The method of claim 1,

The receiving unit configures one repeater group for repeaters whose signal intensity is greater than or equal to a preset threshold, and receives frequency indicator signals from terminals connected to the repeaters belonging to the repeater group. Repeater, characterized in that
The method of claim 1,

And the receiver sets an energy detection section at predetermined intervals in the uplink subframe, and receives the frequency indicator signals in the energy detection section.
The method of claim 3,

And a frequency band reset unit configured to reset the frequency band by using the frequency indicator signals received by the repeater.
The method of claim 4, wherein

The frequency band reset unit selects a frequency band in which the first frequency indicator signal of the repeater in the energy detection interval is located above the received frequency band and the second frequency indicator signal located in the nearest position is received. ,

The first frequency indicator signal within the energy detection interval is located below the received frequency band, and selects the frequency band where the third frequency indicator signal located at the nearest position,

A frequency band in which the first frequency indicator signal is received using a frequency band in which the first frequency indicator signal is received, a frequency band in which the second frequency indicator signal is received, and a frequency band in which the third frequency indicator signal is received. Repeater, characterized in that reset.
The method of claim 5,

And a frequency band at which the first frequency indicator signal is received is reset using the following equation.

here,
Is a frequency band in which the first frequency indicator signal of the repeater in the nth period within the energy detection interval is received;
Is a frequency band at which the second frequency indicator signal is received in the nth period within the energy detection interval,
Is a frequency band at which the third frequency indicator signal is received in the nth period within the energy detection interval,
Is a convergence variable,
Denotes a frequency band in which the first frequency indicator signal is to be received in a reset n + 1th period.
The method of claim 5,

And a frequency band at which the second frequency indicator signal is received and a frequency band at which the third frequency indicator signal is received are reset through a repeater connected to a terminal transmitting the respective frequency indicator signals.
The method of claim 7, wherein

A frequency band for receiving the reset first frequency indicator signal from the intermediate position of the frequency band for receiving the reset second frequency indicator signal and the frequency band for receiving the reset first frequency indicator signal and the resetting And a frequency allocator for allocating to the repeater a frequency resource up to an intermediate position of the frequency band in which the set third frequency indicator signal is to be received.
The method of claim 8,

And a downlink frequency allocator for allocating a frequency band to a terminal connected to the repeater in consideration of the frequency resources allocated to the repeater and the yield of the base station and the relay period.
The method of claim 8,

When priority is given to data transmitted from the repeater to the terminal connected to the repeater,

And the transmitter transmits at least two pieces of information on a frequency band in which the frequency indicator signal is to be received to a terminal connected to the repeater through the downlink subframe.
In the repeater,

Transmitting information on a frequency band for receiving a frequency indicator signal to a terminal connected to the repeater through a downlink subframe of the repeater;

Receiving frequency indicator signals from a terminal connected to the repeater and terminals connected to at least one or more other repeaters around the repeater through an uplink subframe of the repeater; And

Resetting the frequency band using the frequency indicator signals received by the repeater,

And a terminal connected to the repeater emits the frequency indicator signal through the frequency band received from the repeater.
The method of claim 11,

The receiving may include configuring one repeater group for repeaters having a signal intensity greater than or equal to a preset threshold value, and receiving frequency indicator signals from terminals connected to the repeaters belonging to the repeater group. The frequency allocation method of the repeater, characterized in that.
The method of claim 11,

The receiving may include setting an energy detection interval at predetermined intervals in the uplink subframe, and receiving the frequency allocation reference signals through the energy detection interval.
The method of claim 13,

Resetting the frequency band

Selecting a frequency band in which the first frequency indicator signal of the repeater in the energy detection interval is located above the received frequency band and the second frequency indicator signal located in the nearest position is received;

Selecting a frequency band in which the first frequency indicator signal is located below the received frequency band within the energy detection section and is located closest to the received frequency band; And

A frequency band in which the first frequency indicator signal is received using a frequency band in which the first frequency indicator signal is received, a frequency band in which the second frequency indicator signal is received, and a frequency band in which the third frequency indicator signal is received. And resetting the frequency allocation method of the repeater.
The method of claim 14,

The frequency band at which the second frequency indicator signal is received and the frequency band at which the third frequency indicator signal is received are reset through a repeater connected to a terminal that transmits each frequency indicator signal.

A frequency band for receiving the reset first frequency indicator signal from the intermediate position of the frequency band for receiving the reset second frequency indicator signal and the frequency band for receiving the reset first frequency indicator signal and the resetting And allocating a frequency resource up to an intermediate position of a frequency band in which the set third frequency indicator signal is to be received to the repeater.
The method of claim 11,

The transmitting may include, when priority is given to data transmitted from the repeater to the terminal connected to the repeater, information on a frequency band for receiving the frequency indicator signal to the terminal connected to the repeater through the downlink subframe. Transmitting at least two of the frequency allocation method of the repeater.
In the downlink subframe of the repeater, information about a frequency band in which a frequency indicator signal is to be received is transmitted from the downlink subframe to the terminal connected to the repeater, and the terminal connected to the repeater and the repeater in the energy detection interval set in the uplink subframe of the repeater. A repeater for receiving frequency indicator signals from terminals connected with at least one other repeater in the network; And

And a terminal emitting the frequency indicator signal through the frequency band received from the repeater.
In the frame structure of the repeater,

A downlink subframe, in which information on a frequency band from which the frequency indicator signal is to be received from the repeater is transmitted to a terminal connected to the repeater;

And an uplink subframe including an energy detection section for receiving a frequency indicator signal emitted from terminals connected to the terminal and at least one or more other repeaters around the repeater through the frequency band. Frame structure.