KR20170105781A - Apparatus and method on the information exchange among the independent radio communication systems for frequency sharing in a same frequency band based on the interference temperature concept - Google Patents

Abstract

The present invention minimizes the influence of interference between systems using the same frequency band by sharing information necessary for frequency sharing such as interference temperature information through a predefined shared information providing channel by using various systems using the same frequency band So that the frequency efficiency can be maximized.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interference temperature-based information exchange apparatus and method for frequency sharing between different wireless communication systems in the same band,

The following embodiments relate to an apparatus and method for allowing different systems in the same frequency band to share frequency resources for efficient use of frequency resources.

Researches on methods such as cognitive radio have been actively carried out for use of different radio communication systems in a limited frequency band.

In the case of the conventional cognitive radio communication technology, a method of using an empty channel in the frequency band through sensing or avoiding a case where there is already a signal in a channel to be used is used. Also, underlay type cognitive radio communication uses the same channel at the same time, but the second user (system) uses a very low level signal (for example, UWB (ULTRA WIDE BAND) )

SUMMARY OF THE INVENTION It is an object of the present invention to provide a wireless communication system and a method for sharing a frequency using an interference temperature.

More specifically, the present invention provides a method for a secondary user to recognize interference temperature information of an existing user when sharing frequency resources between different wireless communication systems in a certain frequency band, Thereby maximizing the efficiency of frequency resources.

According to another aspect of the present invention, there is provided a method of sharing frequency in a main terminal, comprising: checking frequency sharing information; Confirming whether a predetermined shared information providing channel is available; And transmitting the frequency sharing information through the shared information providing channel when the shared information providing channel is available.

In this case, the frequency-shared information includes interference temperature information, and the interference temperature information includes identification information of the main terminal, priority information, frequency band of the main terminal, received power of the main terminal, background noise Temperature, maximum interference temperature, minimum required signal-to-noise ratio, and allowed interference.

The step of checking whether the predetermined shared information providing channel is available may include determining that the shared information providing channel is available if there is no data to be transmitted through the shared information providing channel for a preset time period. And checking if the shared information providing channel is available again after a lapse of a waiting time if there is data to be transmitted through the shared information providing channel.

At this time, the waiting time may be randomly determined within a predetermined time range.

A method for sharing frequencies in a secondary terminal according to an embodiment of the present invention includes: receiving frequency sharing information through a predetermined shared information providing channel; Calculating a maximum allowable transmission power using the frequency sharing information; And determining a frequency band to be used by the secondary terminal and a transmission power of the secondary terminal within a range not exceeding the maximum allowable transmission power.

In this case, the frequency-shared information includes interference temperature information, and the interference temperature information includes identification information of the main terminal, priority information, frequency band of the main terminal, received power of the main terminal, background noise temperature , An interference temperature maximum value, and a minimum required signal-to-noise ratio.

In this case, a method of sharing frequency in a secondary terminal includes: checking frequency sharing information of the secondary terminal; Confirming whether the shared information providing channel is available; And transmitting frequency sharing information of the sub-terminal through the shared information providing channel when the shared information providing channel is available.

In this case, the frequency sharing information of the sub-terminal includes the interference temperature information of the sub-terminal, and the interference temperature information of the sub-terminal includes identification information of the sub-terminal, priority information, , The reception power of the secondary terminal, the background noise temperature, the maximum interference temperature, the minimum required signal-to-noise ratio, and the allowable interference amount.

The step of checking whether the shared information providing channel is available may include determining that the shared information providing channel is available if data to be transmitted through the shared information providing channel does not exist for a predetermined time period; And checking if the shared information providing channel is available again after a waiting time elapses if data to be transmitted through the shared information providing channel exists.

At this time, the waiting time may be randomly determined within a predetermined time range.

A main terminal sharing a frequency according to an embodiment of the present invention includes: a shared information calculation unit for checking frequency sharing information; A shared information providing channel sensing unit for checking whether a predetermined shared information providing channel is available; And an information sharing unit transmitting the interference temperature information through the shared information providing channel when the shared information providing channel is available.

At this time, if the data to be transmitted through the shared information providing channel does not exist for a preset time, the shared information providing channel sensing unit determines that the shared information providing channel is available and transmits the shared information providing channel through the shared information providing channel If there is data, it can be confirmed whether or not the shared information providing channel can be used again after the waiting time elapses.

A sub-terminal sharing a frequency according to an embodiment of the present invention includes a shared information receiver for receiving frequency-shared information through a predetermined shared information providing channel; A power calculation unit for calculating a maximum allowable transmission power using the frequency sharing information; And a power determiner for determining a frequency band to be used by the secondary terminal and a transmission power of the secondary terminal within a range not exceeding the maximum allowable transmission power.

In this case, the sub-terminal sharing the frequency includes a shared information calculator for confirming the frequency-shared information of the sub-terminal; A shared information providing channel sensing unit for checking whether the shared information providing channel is available; And an information sharing unit transmitting the frequency sharing information of the sub-terminal through the shared information providing channel when the shared information providing channel is available.

The present invention confirms frequency sharing information such as interference temperature information in a main terminal that is a main user terminal, confirms whether a predetermined shared information providing channel can be used, and, when a shared information providing channel is available, The present invention relates to a technique for transmitting a frequency band using interference temperature information in a sub-terminal and transmitting the same through a provided channel, thereby minimizing interference between systems using the same frequency band at the same time, Systems can be used simultaneously to maximize frequency efficiency.

1 is a diagram illustrating an example in which frequencies are used by systems that simultaneously use the same frequency band using a shared information providing channel according to an embodiment.
2 is a diagram illustrating an example of transmitting interference temperature information through a shared information providing channel according to an embodiment.
3 is a diagram illustrating an example in which systems simultaneously using the same frequency band using a shared information providing channel are connected to a frequency according to an exemplary embodiment.
4 is a diagram illustrating a configuration of a main terminal of a wireless communication system sharing a frequency using frequency sharing information according to an exemplary embodiment.
5 is a diagram illustrating a configuration of a secondary terminal of a wireless communication system sharing frequency using frequency sharing information according to an exemplary embodiment.
6 is a flowchart illustrating a process of sharing a frequency using frequency sharing information in a main terminal of a wireless communication system according to an exemplary embodiment.
7 is a flowchart illustrating a process of sharing a frequency using frequency sharing information in a secondary terminal of a wireless communication system according to an exemplary embodiment.

It is to be understood that the specific structural or functional descriptions of embodiments of the present invention disclosed herein are only for the purpose of illustrating embodiments of the inventive concept, But may be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Embodiments in accordance with the concepts of the present invention are capable of various modifications and may take various forms, so that the embodiments are illustrated in the drawings and described in detail herein. However, it is not intended to limit the embodiments according to the concepts of the present invention to the specific disclosure forms, but includes changes, equivalents, or alternatives falling within the spirit and scope of the present invention.

The terms first, second, or the like may be used to describe various elements, but the elements should not be limited by the terms. The terms may be named for the purpose of distinguishing one element from another, for example without departing from the scope of the right according to the concept of the present invention, the first element being referred to as the second element, Similarly, the second component may also be referred to as the first component.

It is to be understood that when an element is referred to as being "connected" or "connected" to another element, it may be directly connected or connected to the other element, . On the other hand, when an element is referred to as being "directly connected" or "directly connected" to another element, it should be understood that there are no other elements in between. Expressions that describe the relationship between components, for example, "between" and "immediately" or "directly adjacent to" should be interpreted as well.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The singular expressions include plural expressions unless the context clearly dictates otherwise. In this specification, the terms "comprises ", or" having ", and the like, are used to specify one or more other features, numbers, steps, operations, elements, But do not preclude the presence or addition of steps, operations, elements, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the meaning of the context in the relevant art and, unless explicitly defined herein, are to be interpreted as ideal or overly formal Do not.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, the scope of the patent application is not limited or limited by these embodiments. Like reference symbols in the drawings denote like elements.

Hereinafter, a wireless communication system and a method for sharing a frequency using an interference temperature according to an embodiment of the present invention will be described in detail with reference to FIGS. 1 to 7. FIG.

One example of a technique used by different wireless communication systems in the present invention is a method using an interference temperature, and a technique using an interference temperature is a technique of avoiding radio interference from the viewpoint of a receiver based on a transceiver interaction.

The concept of the interference temperature is shared by a main user terminal (hereinafter referred to as "main terminal" in the following description) in a cognitive radio communication apparatus (hereinafter referred to as "secondary terminal" Quantify and manage the amount of interference so as to share the frequency band used. That is, it is a technology that enables other wireless communication to use an interference temperature limit value that can maximize interference.

The interference temperature includes all noise signals and interference signals in units of Kelvin temperature, and can be derived from Equation (1) below to obtain thermal noise.

[Equation 1]

That is,

And the bandwidth is

The interference temperature in the in-band is the average interference power

Boltzmann constant

And bandwidth

.

In an ideal situation, it is assumed that the main terminal can distinguish the signals of the main terminal from the interference and noise after performing spectral sensing. Since this model generally requires signal information of the main terminals capable of occupying a specific frequency band, the interference temperature can be easily obtained by Equation (1). In this case, the interference source is the background noise and the interference caused by the terminal (secondary terminal) of the secondary users, and the interference temperature limit value is determined by the bandwidth of the main terminal.

Center frequency

And the bandwidth is

, Average transmit power

(Fc-B / 2, fc + B / 2) which is the frequency band used by the secondary terminal when there is a secondary terminal (CR user) Assuming that the signals of the main terminal exist, the following Equation (2) must be satisfied in order to share the frequency band of the main terminal without interference to the main terminal in the ideal interference temperature model.

&Quot; (2) "

here, Frequency

Quot; interference temperature limit value "

Indicates the interference temperature before the sub-terminal uses the band (i.e., the interference temperature due to the background noise).

M is a value between 0 and 1, which is a parameter indicating an amount of attenuation due to path loss and fading between the transmitting apparatus of the secondary terminal and the receiving apparatus of the primary terminal.

Once the interference temperature is calculated, the transmission power and bandwidth of the secondary terminal can be determined. Assuming that the bandwidth of the secondary terminal is B in the interference temperature model, the allowable maximum transmission power can be calculated as Equation (3) below.

&Quot; (3) "

The capacity in the ideal interference temperature model can be obtained as shown in Equation (4) below based on the Shannon-Hartley theory.

&Quot; (4) "

here,

Is the maximum allowable transmit power at the secondary terminal,

Represents the interference power and the average interference by the main terminal, respectively. L denotes the amount of attenuation due to path loss and fading between the transmitting apparatus of the secondary terminal and the receiving apparatus of the secondary terminal, and means a value between 0 and 1.

In order to use the above-mentioned interference temperature model, the secondary terminal must grasp the information of the primary terminal such as the reception power of the primary terminal, the background noise temperature, and the maximum interference temperature. However, since the main terminal and the sub terminal are independent of each other, communication is not possible unless a special method is provided. In addition, if different systems share frequency resources in a predefined frequency band (unlicensed frequency band), there may be a larger number of system terminals as well as two systems. Accordingly, there is a need for a method of exchanging system information for sharing frequency resources between systems communicating within a predetermined frequency band.

The present invention provides a method of exchanging necessary information so that various wireless communication systems (terminals) share a frequency in a certain frequency band such as cognitive radio communication, so as to mutually operate below a predetermined interference level.

1 is a diagram illustrating an example in which frequencies are used by systems that simultaneously use the same frequency band using a shared information providing channel according to an embodiment.

Referring to FIG. 1, in a certain band sharing frequency resources, a predetermined shared information providing channel that can be commonly accessed in a given frequency band is set up for information exchange between different systems. Sharing information (SI) 120 is a channel for sharing frequency sharing information required for sharing frequency resources with communication apparatuses of different systems, and has a predetermined channel frequency and bandwidth, All wireless communication systems sharing resources can send and receive channel information. That is, communication systems using a frequency-shared band, such as an unlicensed band, must have a device or method for accessing a predefined shared information providing channel 120. The shared information providing channel 120 is a shared information providing channel in which each system in the frequency sharing band transmits information such as its identification information, priority information, received power, background noise temperature, interference temperature maximum value, minimum required signal- Information).

In the case of accessing shared information through the shared information providing channel 120, a time division duplexing (TDD) method may be appropriate in order to minimize the channel bandwidth. Each wireless communication system, such as a wireless LAN, may transmit an acknowledgment (ACK) signal in advance after transmission, or may use a predefined data structure so that transmission signals between the systems do not overlap.

Various wireless communication systems in the shared frequency band can acquire information of other system using access and information of a predefined shared information providing channel and can determine the optimization of their transmission and reception amount and transmission amount based on the acquired information have.

The frequency bands excluding the above-mentioned shared information providing channel band are "system frequency sharing band 110" used by systems sharing actual frequencies. In this band, different systems communicate with each other within a range that does not disturb the operation of different systems using the shared information of the shared information providing channel 120, and may set priorities among the systems as needed. As can be seen in FIG. 1, systems sharing frequency resources (S1, S2, S3) operate with different operating frequency bands, bandwidths, and power sizes.

2 is a diagram illustrating an example of transmitting interference temperature information through a shared information providing channel according to an embodiment.

In step 210 of FIG. 2, it is determined whether the system accesses the shared information providing channel and is used. In step 220, if the shared information providing channel is available, In step 230, when the information transmitted by the other system is recognized as a result of accessing the shared information providing channel, step 230 is a step of waiting for access and transmission of the shared information providing channel.

Referring to FIG. 2, an arbitrary first system 251 monitors a state of a shared information providing channel in order to transmit shared information to a shared information providing channel. In the case of a shared information providing channel, if there is no device for controlling access, a plurality of systems transmit shared information at the same time, resulting in a signal collision. Accordingly, after detecting a case where there is no information in a predetermined time interval (sensing time) for preventing crosstalk, it transmits trunk temperature information (Data 1) of the first system 251 for frequency sharing. If the second system 252 accesses the shared information providing channel in a situation where Data 1 is being transmitted, the second system 252 checks the sensing time before data transmission. At this time, because there is Data 1 in the shared information providing channel, the second system 252 does not transmit the interference temperature information. The second system 252 transmits the interference temperature information (Data 2) when it recognizes the sensing time by accessing the shared information providing channel again after a predetermined time (which can be defined in advance for data access). Thereafter, the third system 253 also performs the above-described operations.

3 is a diagram illustrating an example in which systems simultaneously using the same frequency band using a shared information providing channel are connected to a frequency according to an exemplary embodiment.

Referring to FIG. 3, when accessing the shared information providing channel, there are cases where the user terminal directly accesses according to the performance of the communication system and the case where direct access is impossible due to the limitation of the user terminal.

In the case where the user terminal can directly access the shared information providing channel, the RF repeater hopps the frequency to periodically check the shared information providing channel, or communicate with the user terminal such as Bluetooth or NFC, It is expected that a method of accessing the shared information providing channel by a communication module other than the signal transmitting and receiving repeater and receiving the information is also possible.

In the case of a system in which the user terminal can not be directly accessed, the base station 320 configuring the link with the user terminal accesses the shared information providing channel and transmits the interference temperature information to the user terminals 321 and 322, 320 may apply the optimal transmission / reception scheme using the shared information to the user terminals 321, 322.

The shared information corresponding to the bandwidth, bandwidth, and interference temperature information of the shared information providing channel mentioned in the description of the present invention should be determined in consideration of the wireless communication system operating in the frequency shared band. Also, the access to the shared information providing channel and the sharing information transmission / reception may be performed through other methods based on the concept of the present invention.

4 is a diagram illustrating a configuration of a main terminal of a wireless communication system sharing a frequency using an interference temperature according to an exemplary embodiment.

4, the main terminal 400 includes a control unit 410, a shared information calculation unit 414, a shared information providing channel sensing unit 415, an information sharing unit 416, a communication unit 420, 430 can be used to provide interference temperature information through the shared information providing channel.

The communication unit 420 is a communication interface device including a receiver and a transmitter, and transmits and receives data by wire or wireless. In addition, the communication unit 420 may access the shared information providing channel and transmit the interference temperature information of the main terminal 400 through the shared information providing channel.

The storage unit 430 stores an operating system, an application program, and storage data for controlling the overall operation of the main terminal 400. [ In addition, the storage unit 430 may store information on a shared information providing channel and store information necessary for frequency sharing according to the present invention.

The shared information calculation unit 414 can measure, calculate, or confirm the frequency-shared information, which is information necessary for sharing the frequency. In this case, the interference temperature information may include identification information of the main terminal, priority information, frequency band of the main terminal, received power of the main terminal, background noise temperature, interference temperature Maximum value, minimum required signal-to-noise ratio, and allowed interference amount.

The shared information providing channel sensing unit 415 can confirm whether a predetermined shared information providing channel can be used. Specifically, if there is no data to be transmitted through the shared information providing channel for a preset time, the shared information providing channel sensing unit 415 determines that the shared information providing channel is available and transmits the shared information providing channel If data exists, it can be confirmed whether the shared information providing channel can be used again after the waiting time elapses. At this time, the waiting time may be determined randomly within a predetermined time range or may be set to a predetermined time. At this time, the shared information providing channel is a predetermined channel for sharing frequency sharing information.

When the shared information providing channel is available, the information sharing unit 416 can transmit the frequency sharing information to the shared information providing channel using the communication unit 420. [

The control unit 410 can control the overall operation of the main terminal 400. [ The control unit 410 may perform functions of the shared information calculation unit 414, the shared information providing channel sensing unit 415, and the information sharing unit 416. The control unit 410, the shared information calculating unit 414, the shared information providing channel sensing unit 415, and the information sharing unit 416 are separately shown to distinguish the respective functions. Accordingly, the control unit 410 may include at least one processor configured to perform the functions of the shared information calculation unit 414, the shared information providing channel sensing unit 415, and the information sharing unit 416, respectively. The control unit 410 includes at least one processor configured to perform a function of each of the functions of the shared information calculating unit 414, the shared information providing channel detecting unit 415 and the information sharing unit 416 .

5 is a diagram illustrating a configuration of a secondary terminal of a wireless communication system sharing a frequency using an interference temperature according to an exemplary embodiment.

5, the secondary terminal 500 includes a control unit 510, a shared information receiving unit 511, a power calculating unit 512, a power determining unit 513, a shared information calculating unit 514, The frequency sharing information may be shared through the shared information providing channel using the sensing unit 515, the information sharing unit 516, the communication unit 520, and the storage unit 530 to receive the frequency sharing.

The communication unit 520 is a communication interface device including a receiver and a transmitter, and transmits and receives data by wire or wireless. Also, the communication unit 520 may access the shared information providing channel, receive the frequency sharing information, and transmit the frequency sharing information of the secondary terminal 500 through the shared information providing channel.

The storage unit 530 stores an operating system, an application program, and storage data for controlling the overall operation of the secondary terminal 500. In addition, the storage unit 530 may store information on a shared information providing channel and store information necessary for frequency sharing according to the present invention.

The shared information receiving unit 511 may search for a predetermined shared information providing channel using the communication unit 520 and receive frequency sharing information from the shared information providing channel. At this time, the frequency sharing information may be interference temperature information. The interference temperature information includes at least one of identification information of the main terminal, priority information, frequency band of the main terminal, received power of the main terminal, background noise temperature, interference temperature maximum value, and minimum required signal to noise ratio .

The power calculation unit 512 can calculate the maximum allowable transmission power using the frequency sharing information.

The power determination unit 513 can determine the frequency band to be used by the secondary terminal 500 and the transmission power of the secondary terminal 500 within a range that does not exceed the maximum allowable transmission power.

The shared information calculation unit 514 can confirm frequency sharing information of the secondary terminal 500. At this time, the share information of the secondary terminal 500 may be the interference temperature information of the secondary terminal 500. The interference temperature information of the secondary terminal 500 includes identification information of the secondary terminal 500, priority information, frequency band of the secondary terminal 500, received power of the secondary terminal 500, background noise temperature, An interference temperature maximum value, a minimum required signal-to-noise ratio, and an allowable interference amount.

The shared information providing channel sensing unit 515 can confirm whether the shared information providing channel can be used. More specifically, if there is no data to be transmitted through the shared information providing channel for a preset time, the shared information providing channel sensing unit 515 determines that the shared information providing channel is available and transmits the shared information through the shared information providing channel It is possible to confirm whether the shared information providing channel can be used again after the waiting time elapses. At this time, the waiting time may be determined randomly within a predetermined time range or may be set to a predetermined time.

When the shared information providing channel is available, the information sharing unit 516 can transmit frequency sharing information of the secondary terminal through the communication unit 520 to the shared information providing channel.

The control unit 510 can control the overall operation of the secondary terminal 500. The control unit 510 includes a shared information receiving unit 511, a power calculating unit 512, a power determining unit 513, a shared information calculating unit 514, a shared information providing channel sensing unit 515, 516). ≪ / RTI > A shared information receiving unit 511, a power calculating unit 512, a power determining unit 513, a shared information calculating unit 514, a shared information providing channel sensing unit 515 and an information sharing unit 516, Are shown separately for explaining each function. Accordingly, the control unit 510 includes a shared information receiving unit 511, a power calculating unit 512, a power determining unit 513, a shared information calculating unit 514, a shared information providing channel sensing unit 515, and an information sharing unit 516 And at least one processor configured to perform each of the functions. The control unit 510 includes a shared information receiving unit 511, a power calculating unit 512, a power determining unit 513, a shared information calculating unit 514, a shared information providing channel sensing unit 515, 516 may comprise at least one processor configured to perform some of the respective functions.

Hereinafter, a method for sharing frequency using frequency sharing information such as interference temperature in the wireless communication system according to the present invention will be described with reference to the drawings.

6 is a flowchart illustrating a process of sharing a frequency using frequency sharing information in a main terminal of a wireless communication system according to an exemplary embodiment.

Referring to FIG. 6, the main terminal 400 confirms frequency sharing information (610). At this time, the frequency sharing information may be trunk temperature information. The interference temperature information includes at least one of the identification information of the main terminal, the priority information, the frequency band of the main terminal, the reception power of the main terminal, the background noise temperature, the maximum interference temperature, the minimum required signal- . ≪ / RTI >

In step 620, the main terminal 400 determines whether there is data to be transmitted through the shared information providing channel to confirm whether a predetermined shared information providing channel can be used.

As a result of step 620, if the data transmitted through the shared information providing channel exists for a preset time, the main terminal 400 sets a waiting time (630).

When the waiting time elapses (640), the main terminal 400 returns to step 620. [

If it is determined in step 620 that the data transmitted through the shared information providing channel does not exist for a preset time, the main terminal 400 transmits the frequency sharing information through the shared information providing channel (step 650)

7 is a flowchart illustrating a process of sharing a frequency using frequency sharing information in a secondary terminal of a wireless communication system according to an exemplary embodiment.

Referring to FIG. 7, the secondary terminal 500 receives frequency sharing information through a predetermined shared information providing channel. At this time, the frequency sharing information may be interference temperature information.

Then, the secondary terminal 500 calculates the maximum allowable transmission power using the frequency sharing information.

Then, the secondary terminal 500 determines the frequency band to be used by the secondary terminal and the transmission power of the secondary terminal within a range not exceeding the maximum allowable transmission power.

Then, the secondary terminal 500 confirms frequency sharing information of the secondary terminal 500 (740). At this time, the frequency sharing information of the secondary terminal 500 may be the interference temperature information of the secondary terminal. The interference temperature information of the secondary terminal includes the identification information of the secondary terminal, the priority information, the frequency band of the secondary terminal, the reception power of the secondary terminal, the background noise temperature, the maximum interference temperature, the minimum required signal- As shown in FIG.

In step 750, the secondary terminal 500 determines whether there is data to be transmitted through the shared information providing channel in order to confirm whether the predetermined shared information providing channel can be used.

If the data transmitted through the shared information providing channel exists for a predetermined time as a result of checking in step 750, the secondary terminal 500 sets a waiting time (760).

When the standby time has elapsed (770), the secondary terminal 500 returns to step 750.

As a result of step 750, if the data transmitted through the shared information providing channel does not exist for a preset time, the secondary terminal 500 transmits the frequency sharing information of the secondary terminal 500 through the shared information providing channel (780)

The apparatus described above may be implemented as a hardware component, a software component, and / or a combination of hardware components and software components. The apparatus and components described in the embodiments may be implemented, for example, as a processor, a controller, an arithmetic logic unit (ALU), a digital signal processor, a microcomputer, a field programmable gate array (FPGA) unit, a microprocessor, or any other device capable of executing and responding to instructions. The processing device may execute an operating system (OS) and one or more software applications running on the operating system. The processing device may also access, store, manipulate, process, and generate data in response to execution of the software. For ease of understanding, the processing apparatus may be described as being used singly, but those skilled in the art will recognize that the processing apparatus may have a plurality of processing elements and / As shown in FIG. For example, the processing unit may comprise a plurality of processors or one processor and one controller. Other processing configurations are also possible, such as a parallel processor.

The software may include a computer program, code, instructions, or a combination of one or more of the foregoing, and may be configured to configure the processing device to operate as desired or to process it collectively or collectively Device can be commanded. The software and / or data may be in the form of any type of machine, component, physical device, virtual equipment, computer storage media, or device , Or may be permanently or temporarily embodied in a transmitted signal wave. The software may be distributed over a networked computer system and stored or executed in a distributed manner. The software and data may be stored on one or more computer readable recording media.

The method according to an embodiment may be implemented in the form of a program command that can be executed through various computer means and recorded in a computer-readable medium. The computer-readable medium may include program instructions, data files, data structures, and the like, alone or in combination. The program instructions to be recorded on the medium may be those specially designed and configured for the embodiments or may be available to those skilled in the art of computer software. Examples of computer-readable media include magnetic media such as hard disks, floppy disks and magnetic tape; optical media such as CD-ROMs and DVDs; magnetic media such as floppy disks; Magneto-optical media, and hardware devices specifically configured to store and execute program instructions such as ROM, RAM, flash memory, and the like. Examples of program instructions include machine language code such as those produced by a compiler, as well as high-level language code that can be executed by a computer using an interpreter or the like. The hardware devices described above may be configured to operate as one or more software modules to perform the operations of the embodiments, and vice versa.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments. For example, it is to be understood that the techniques described may be performed in a different order than the described methods, and / or that components of the described systems, structures, devices, circuits, Lt; / RTI > or equivalents, even if it is replaced or replaced.

Therefore, other implementations, other embodiments and equivalents to the claims are within the scope of the following claims.

400; Main terminal
410; The control unit
414; The shared-
415; The shared information providing channel sensing unit
426; Information Sharing Department
420; Communication section
430; The storage unit

Claims (14)

Confirming frequency sharing information;
Confirming whether a predetermined shared information providing channel is available; And
If the shared information providing channel is available, transmitting the frequency shared information through the shared information providing channel
Wherein the frequency is shared by the primary terminal.
The method according to claim 1,
Wherein the frequency sharing information includes interference temperature information,
The interference temperature information may include,
And at least one of the identification information of the main terminal, the priority information, the frequency band of the main terminal, the reception power of the main terminal, the background noise temperature, the maximum interference temperature, the minimum required signal-
A method for sharing frequency in a primary terminal.
The method according to claim 1,
Wherein the step of verifying that the predetermined shared information providing channel is available,
Determining that the shared information providing channel is available if data to be transmitted through the shared information providing channel does not exist for a predetermined period of time; And
If there is data to be transmitted through the shared information providing channel, checking whether the shared information providing channel can be used again after a waiting time elapses
Wherein the frequency is shared by the primary terminal.
The method of claim 3,
The waiting time is,
Determined randomly within a predetermined time range
A method for sharing frequency in a primary terminal.
Receiving frequency sharing information through a predetermined shared information providing channel;
Calculating a maximum allowable transmission power using the frequency sharing information; And
Determining a frequency band to be used by the secondary terminal and a transmission power of the secondary terminal within a range not exceeding the maximum allowable transmission power
Wherein the sub-terminal is a sub-terminal.
6. The method of claim 5,
Wherein the frequency sharing information includes interference temperature information,
The interference temperature information may include,
And at least one of identification information of the main terminal, priority information, frequency band of the main terminal, received power of the main terminal, background noise temperature, interference temperature maximum value,
A method of sharing frequency in a secondary terminal.
6. The method of claim 5,
Confirming frequency sharing information of the secondary terminal;
Confirming whether the shared information providing channel is available; And
If the shared information providing channel is available, transmitting frequency sharing information of the secondary terminal through the shared information providing channel
Wherein the frequency division multiplexing method comprises the steps of:
8. The method of claim 7,
Wherein the frequency sharing information of the secondary terminal includes interference temperature information of the secondary terminal,
The interference temperature information of the sub-
And at least one of the identification information of the sub-terminal, priority information, frequency band of the sub-terminal, received power of the sub-terminal, background noise temperature, interference temperature maximum value, minimum required signal-
A method of sharing frequency in a secondary terminal.
8. The method of claim 7,
Wherein the step of verifying that the shared information providing channel is available comprises:
Determining that the shared information providing channel is available if data to be transmitted through the shared information providing channel does not exist for a predetermined period of time; And
If there is data to be transmitted through the shared information providing channel, checking whether the shared information providing channel can be used again after a waiting time elapses
Wherein the sub-terminal is a sub-terminal.
10. The method of claim 9,
The waiting time is,
Determined randomly within a predetermined time range
A method of sharing frequency in a secondary terminal.
A shared information calculation unit for checking frequency sharing information;
A shared information providing channel sensing unit for checking whether a predetermined shared information providing channel is available; And
When the shared information providing channel is available, transmitting the frequency sharing information through the shared information providing channel,
The frequency of which is less than a predetermined frequency.
12. The method of claim 11,
Wherein the shared information providing channel sensing unit comprises:
If there is no data to be transmitted through the shared information providing channel for a preset time period, it is determined that the shared information providing channel is available, and if there is data to be transmitted through the shared information providing channel, It is determined whether the shared information providing channel is available
Main terminal sharing frequency.
A shared information receiver for receiving frequency sharing information through a predetermined shared information providing channel;
A power calculation unit for calculating a maximum allowable transmission power using the frequency sharing information; And
A power decision unit for determining a frequency band to be used by the secondary terminal and a transmission power of the secondary terminal within a range not exceeding the maximum allowable transmission power,
The sub-terminal sharing frequency.
14. The method of claim 13,
A shared information calculation unit for checking frequency sharing information of the secondary terminal;
A shared information providing channel sensing unit for checking whether the shared information providing channel is available; And
When the shared information providing channel is available, transmitting the frequency sharing information of the secondary terminal through the shared information providing channel,
The sub-terminal sharing frequency.

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