KR101634379B1 - Method and apparatus for operating channel priority allocation of Multiple spectrum sharing system - Google Patents

Abstract

 The present invention relates to a method for improving frequency sharing efficiency between a plurality of adjacent systems using an idle band, and a method of assigning an operation channel priority among frequency sharing systems according to the present invention is a method for assigning an operation channel priority among inter- A rough channel prioritization step of collecting information on a target WSO (White Space Object) and an operation channel for prioritization of an operation channel, and classifying the operation channel according to a predetermined criterion; And a fine channel prioritization step of removing a channel by checking an interference level of the classified channel. According to the present invention, a white space object (WSO) that can only use an operation channel without using a usable channel or a use restriction channel registered in a CM (Coexistence Manager) object is utilized for effective channel allocation, thereby improving effective mutual coexistence between frequency sharing systems .

Description

 TECHNICAL FIELD [0001] The present invention relates to a method and apparatus for assigning an operation channel priority among frequency sharing systems,

The present invention relates to a method for improving frequency sharing efficiency between a plurality of adjacent systems using an idle band.

 Mutual coexistence technology is a spectrum management technology in which wireless devices using different communication protocols coexist with each other without harmful interference in core frequency (30 ~ 10GHz) where various Dynamic Spectrum Access (DSA) technologies are expected to emerge. DSA technology such as Underlay and Overlay is contrary to the current static spectrum management technology and it manages the spectrum dynamically according to the surrounding radio environment of the wireless device to maximize the flexibility and efficiency of frequency use Wireless access and management technology. IEEE 802, SCC 41, etc., in order to prepare for the frequency spectrum sharing technology that is emerging in various wireless services.

In Korea, there is no systematic study on integrated mutual coexistence conditions of various shared technologies to secure optimum frequency efficiency in a congested radio environment such as frequency auction system, permission and license-exempt spectrum sharing. In IEEE 802.19, the international standardization organization, the wireless coexistence working group (WG) which deals with the coexistence problem between 802 standards, the technical coexistence scenarios between the licensed and license-exempted frequency-sharing wireless systems, mutual coexistence analysis, Issues are being discussed.

SUMMARY OF THE INVENTION The present invention has been made in order to solve the problems of the prior art, and it is an object of the present invention to provide a method for prioritizing an operation channel for mutual coexistence between frequency sharing systems.

According to an embodiment of the present invention, there is provided a method for allocating an operation channel among inter-frequency sharing systems, comprising collecting information on a target WSO (White Space Object) and an operation channel for prioritization of an operation channel A rough channel priority allocation step of classifying the operation channel according to a predetermined criterion; And a fine channel prioritization step of removing a channel by checking an interference level of the classified channel.

The information on the target WSO includes channel classification information and coexistence aggregation information for the target WSO.

The coexistence aggregation information includes authorization type and network description information of the coexistence aggregation.

The information on the operating channel includes information on the total occupancy of the operating channel and the number of elements of the coexistence set.

Wherein the step of allocating the approximate channel includes: collecting information for prioritization of the operation channel; An operation channel removing step of removing an operation channel used by the coexistence aggregation element of the authorized type of the operation channel; And a priority assignment step of assigning a priority of operation channels of the coexistence aggregation element of the unauthorized type of the operation channel.

Wherein the assigning of the priorities comprises: assigning the operation channels to a first group used by coexistence aggregation elements of the same network technology as the target WSO; And allocating channels out of the first group to a second group.

It is preferable that the channels of the first group and the second group are assigned a priority order in the order of the small occupancy rate.

It is preferable that, when the total occupancy rate is the same, priority is assigned in descending order of the number of coexistence aggregation elements using the same occupation rate.

Preferably, the fine channel priority assigning step may include checking an interference level of the operation channel of the first group or the second group to remove an operation channel exceeding a predetermined threshold value.

In order to solve the above-described technical problem, the apparatus for assigning an operation channel priority among frequency sharing systems according to this embodiment collects information on a target WSO (White Space Object) and an operation channel for prioritization of an operation channel A rough channel priority assigning unit for classifying the operation channel according to a predetermined criterion; And a fine channel priority assignment unit for checking the interference level of the classified channel to remove the channel.

 The operation channel priority allocation method according to the present invention uses a white space object (WSO) that can only use an operation channel without using a usable channel or a use restriction channel registered in a CM (Coexistence Manager) entity, Thereby effectively improving mutual coexistence.

1 shows a mutual coexistence management system structure for managing a frequency sharing device.
FIG. 2 is a flowchart illustrating a method of assigning an operation channel priority among frequency sharing systems.
FIG. 3 is a detailed flowchart showing the frequency-sharing inter-system operation channel priority allocation method in more detail.
4 is a diagram illustrating a process of transmitting / receiving a message based on a request / response.
5 is a diagram illustrating an indication-based message transmission / reception process.

The following merely illustrates the principles of the invention. Therefore, those skilled in the art will be able to devise various apparatuses which, although not explicitly described or shown herein, embody the principles of the invention and are included in the concept and scope of the invention. It is also to be understood that all conditional terms and examples recited in this specification are, in principle, expressly intended for the purpose of enabling the inventive concept to be understood, and are not intended to be limiting as to such specifically recited embodiments and conditions .

The present invention relates to a frequency band that can be used in a communication system, for example, a cognitive radio (CR) system, a TV band in an IEEE 802.19-based system, And a mutual coexistence management system for efficiently managing a frequency sharing device by detecting a white space (WS) in an idle frequency band (WS). Although the IEEE 802.19 based system is described as an example, the present invention can be applied to other communication systems.

In addition, in the embodiment of the present invention, a plurality of different systems coexist in the communication system to propose a method for efficiently managing the frequency sharing device in the TV band. Here, in the embodiment of the present invention, each object of the resource management system for sharing a frequency band usable in the communication system mutually coexists and a plurality of different systems, in particular, different communication systems, for example, So as to share a usable frequency band in a frequency band already in use as in the TV band, thereby improving the use efficiency of the frequency resource.

That is, in the embodiment of the present invention, a resource management system for coexistence and frequency sharing among a plurality of different systems in a communication system shares a usable frequency band to improve usage efficiency of limited frequency resources. Hereinafter, a mutual coexistence management system structure for managing a frequency sharing device according to an embodiment of the present invention will be described in more detail with reference to FIG.

FIG. 1 shows a mutual coexistence management system structure for managing a frequency sharing device for the purpose of improving frequency sharing efficiency among a plurality of frequency sharing devices. The channel information database 10 is a DB for providing channel information that can be used by the frequency sharing devices 20 and 20 '. The frequency sharing device control system is composed of the following three entities.

A coexistence enabler (CE) 200 is present in the frequency sharing device 20 and includes a coexistence manager (CM) (100) and the frequency sharing device (20). (Radio access method, transmission power, spectrum sensing threshold value, location, etc.) related to the corresponding frequency sharing device requested by the CM 100 from the frequency sharing device 20 and transmits the extracted context information to the CM 100, (Changes in the context information of the frequency sharing device 20) requested by the CM 100 and sends the setting of the configuration of the frequency sharing device 20 And reflects it to the sharing device 20.

CM 100 is an entity making important decisions related to frequency sharing such as operation frequency allocation, transmission power allocation, and transmission time allocation for improving the frequency sharing efficiency of a plurality of frequency sharing devices 20 and 20 '. The CM 100 can collect channel measurement information and the like through the frequency sharing device. When it is necessary to cooperate with another CM 100 that controls another frequency sharing device 20, it is possible to directly exchange information, or to coexist with a coexistence discovery and information server (CDIS) 300). ≪ / RTI > The frequency sharing devices 20 can obtain usable channel information from the channel information database 10. [

The CDIS 300 is an entity to assist the CM 100 in determining the frequency sharing device control. It receives the necessary information from many CMs, stores it, and sends the necessary information to the connected CM. The frequency sharing devices 20 can obtain usable channel information from the channel information database 10. [

Hereinafter, a method of assigning an operation channel priority among frequency sharing systems performed in the CM 100 described above with reference to FIG. 2 will be described.

FIG. 2 is a flowchart illustrating a method of assigning an operation channel priority among frequency sharing systems. Referring to FIG. 2, a method for allocating an operation frequency channel among frequency sharing systems according to an embodiment of the present invention includes a coarse channel priority allocating step S100 and a fine channel priority allocating step S200. .

The approximate channel priority allocation step S100 collects information on the target WSO (white space object) and the operation channel for prioritization of the operation channel, and classifies the operation channel according to a predetermined criterion.

The fine channel priority allocation step S200 removes the channel by checking the interference level of the classified channel.

Hereinafter, referring to FIG. 3, a more detailed description will be made of FIG. 3. FIG. 3 is a detailed flowchart illustrating a method of assigning an operation channel priority among frequency sharing systems. The approximate channel priority allocation step S100 according to the present embodiment includes an information collection step S110, an operation channel removal step S120, and a priority allocation step S130.

The information collection step (S110) collects information for prioritization of the operation channel. The information about the target WSO collected in this embodiment includes channel classification information and coexistence aggregation information for the target WSO. Also, the coexistence aggregation information includes the authorization type and the network description information of the coexistence set, and the information on the operation channel may include information on the total occupancy of the operation channel and the number of elements of the coexistence set.

That is, the approximate channel priority allocating step S100 includes a channel classification of the target WSO, a coexistence set, an authorization type of coexistence set elements using an operation channel, type, network technology, total occupancy of the operating channel, and coexistence set element.

The operation channel removal step (S120) removes the operation channel used by the coexistence group element of the authorized license type (Light license type).

The priority allocating step (S130) allocates the priority of the operation channels of the coexistence aggregation element of the unlicensed type among the operation channels. Further, in this embodiment, the priority allocation step S130 includes a first group allocation step S132 and a second group allocation step S134.

The first group allocation step (S132) allocates the operation channel to the first group used by the coexistence aggregation element of the same network technology as the target WSO.

The second group allocation step (S134) allocates the channels out of the first group to the second group.

Further, the channels in the first group and the second group are assigned priorities in descending order of total occupancy.

Here, when the total occupancy rate is the same or within a predetermined error range, the priority is assigned in descending order of the number of coexisting set elements using the same or similar operation channel.

The fine channel priority allocation step S200 then checks the interference level of the operation channel of the first group or the second group to remove the operation channel exceeding the predetermined threshold value.

Hereinafter, primitives and messages of a mutual coexistence system for implementing a priority allocation method according to an embodiment of the present invention will be described with reference to FIGs. 4 and 5. FIG.

4 is a diagram illustrating a primitive based on a request / response and a process of transmitting and receiving a message. As shown in FIG. 4, the primitive and message based on the request / response of the mutual coexistence management system are shown in Table 1 to implement the proposed operation channel priority assignment technique.

Request / response
Based primitive CoexistenceReport.request ()
CoexistenceReport.response (
channelPriority
)
ChannelPriority :: = SEQUENCE OF ChannelPriorityElement OPTIONAL
ChannelPriorityElement :: = SEQUENCE {
channelNumber INTEGER,
priority INTEGER
} Request / response
Based message
CoexistenceReport_Request :: = SEQUENCE {}
CoexistenceReport_Response :: = SEQUENCE {
channelPriority SEQUENCE OF ChannelPriorityElement OPTIONAL
}
ChannelPriorityElement :: = SEQUENCE {
channelNumber INTEGER,
priority INTEGER
}

A white space object (WSO) 30 capable of only using an operation channel transmits CoexistenceReport.request () to the CE 20 and the CE 20 to the CM 100. CM 100 sends CoexistenceReport.response () to CE 20 and CE 20 to WSO 30.

5 is a diagram illustrating a process of transmitting and receiving an indication-based primitive and a message. As shown in FIG. 5, the indication-based primitives and messages of the mutual coexistence management system are shown in Table 2 to implement the proposed operation channel priority allocation method.

Indication
Based primitive CoexistenceReport.indication (
channelPriority
) Indication
Based message
CoexistenceReportAnnouncement :: = SEQUENCE {
channelPriority SEQUENCE OF ChannelPriorityElement OPTIONAL
}

CM 100 sends CoexistenceReportAnnouncement to CE 20 and CE 20 sends CoexistenceReport.indication to WSO 30.

In the operation channel priority allocation method according to the present invention, a white space object (WSO) that can use only an operation channel without using a use channel or a use restriction channel registered in a CM (Coexistence Manager) entity is used for effective channel allocation Thereby effectively improving mutual coexistence between frequency sharing systems.

In the meantime, the method of assigning priority among the frequency sharing systems of the present invention can be implemented by a computer-readable code on a computer-readable recording medium. A computer-readable recording medium includes all kinds of recording apparatuses in which data that can be read by a computer system is stored.

Examples of the computer-readable recording medium include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, and the like. Computer-readable code in a distributed fashion can be stored and executed. In addition, functional programs, codes, and code segments for implementing the present invention can be easily deduced by programmers skilled in the art to which the present invention belongs.

It will be apparent to those skilled in the art that various modifications, substitutions and substitutions are possible, without departing from the scope and spirit of the invention as disclosed in the accompanying claims. will be.

Therefore, the embodiments disclosed in the present invention and the accompanying drawings are intended to illustrate and not to limit the technical spirit of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments and the accompanying drawings . The scope of protection of the present invention should be construed according to the following claims, and all technical ideas within the scope of equivalents should be construed as falling within the scope of the present invention.

Claims (18)

A rough channel prioritization step of collecting information on a target WSO (White Space Object) and an operation channel for prioritization of an operation channel, and classifying the operation channel according to a predetermined criterion; And
And a fine channel prioritization step of removing a channel by checking an interference level of the classified channel. The method according to claim 1,
Wherein the information about the target WSO includes channel classification information and coexistence aggregation information for the target WSO. 3. The method of claim 2,
Wherein the coexistence aggregation information includes authorization type and network description information of the coexistence aggregation. The method according to claim 1,
Wherein the information on the operation channel includes information on the total occupancy rate of the operation channel and the number of elements of the coexistence group. The method according to claim 1,
Wherein the approximate channel priority assigning step comprises:
An information collecting step of collecting information for priority allocation of the operation channel;
An operation channel removing step of removing an operation channel used by the coexistence aggregation element of the authorized type of the operation channel; And
And allocating a priority order of the operation channels of the coexistence aggregation elements of the unauthorized type among the operation channels. 6. The method of claim 5,
Wherein the assigning of the priorities comprises: assigning the operation channels to a first group used by coexistence aggregation elements of the same network technology as the target WSO; And
And allocating channels out of the first group to a second group. The method according to claim 6,
And assigning a priority to the channels of the first group and the second group in descending order of the total occupancy rate. 8. The method of claim 7,
Wherein when the total occupancy rate is the same, priority is assigned in descending order of the number of coexisting aggregate elements using the same occupancy rate. The method according to claim 6,
Wherein the fine channel priority assigning step comprises:
And checking an interference level of the operation channel of the first group or the second group to remove an operation channel exceeding a predetermined threshold value. A rough channel priority assigning unit for collecting information on a target WSO (White Space Object) and an operation channel for prioritization of an operation channel, and classifying the operation channel according to a predetermined criterion; And
And a fine channel priority assignment unit for checking the interference level of the classified channel to remove the channel. 11. The method of claim 10,
Wherein the information about the target WSO includes channel classification information and coexistence aggregation information for the target WSO. 12. The method of claim 11,
Wherein the coexistence aggregation information includes authorization type and network description information of the coexistence aggregation. 11. The method of claim 10,
Wherein the information on the operation channel includes information on the total occupancy of the operation channel and the number of elements of the coexistence group. 11. The method of claim 10,
Wherein the approximate channel priority assigning unit comprises:
An information collecting unit for collecting information for priority allocation of the operation channel;
An operation channel removing unit for removing an operation channel used by the coexistence aggregation element of the authorized type of the operation channel; And
And a priority assigning unit for assigning priorities of the operation channels of the coexistence aggregation elements of the unauthorized type among the operation channels. 15. The method of claim 14,
Wherein the assigning unit assigns the operation channel to a first group used by a coexistence aggregation element of the same network technology as the target WSO; And
And a second group assigning unit for assigning the channels out of the first group to a second group. 16. The method of claim 15,
And allocating priorities to the channels in the first group and the second group in descending order of the total occupancy rate. 17. The method of claim 16,
Wherein when the total occupancy rate is the same, priority is assigned in descending order of the number of coexisting aggregate elements using the same occupancy rate. 16. The method of claim 15,
Wherein the fine channel priority assigning unit assigns,
Wherein the interference level of the operation channel of the first group or the second group is checked to remove an operation channel exceeding a predetermined threshold value.

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