KR20140009916A - 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 adjacent systems using an idle band. A method for allocating an operating channel priority between frequency-sharing systems includes a step of approximate channel priority allocation collecting information about information about target WSO (white space object) for allocating priority of active channels and classifying the active channels according to a predetermined reference; and a step of micro channel priority allocation checking an interference level of the classified channel and removing the channel. According to the present invention, the effective coexistence between frequency-sharing systems by utilizing a usable channel registered on a CM (coexistence manager) object or WSO (white space object) capable of using only active channels without any limited channel in effective allocating channels. [Reference numerals] (AA) START; (BB) END; (S100) Allocate approximate channel priority; (S200) Allocate micro channel priority

Description

 Method and apparatus for operating channel priority allocation between 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.

 Coexistence technology is a spectrum management technology in which wireless devices using different communication protocols coexist without harmful interference at the core frequency (30MHz ~ 10Hz) where various Dynamic Spectrum Access (DSA) technologies are expected to emerge. DSA technologies such as Underlay and Overlay are contrary to the current static spectrum management technology, which maximizes the flexibility and efficiency of frequency utilization by managing the spectrum dynamically according to the surrounding radio environment of the wireless device. Wireless connection and management technology. In preparation for various frequency sharing technologies such as IEEE 802 and SCC 41, various technologies are being developed to derive mutual coexistence standards for comprehensive management of multiple sharing technologies in terms of spectrum management.

In Korea, research on integrated mutual coexistence conditions of various sharing technologies has not been conducted systematically to secure optimal frequency efficiency in a crowded radio environment such as frequency auction system and sharing of licensed and unlicensed bands. IEEE 802.19, the International Organization for Standardization, is a wireless coexistence working group (WG) that addresses coexistence issues between 802 standards. Issues are being discussed.

SUMMARY OF THE INVENTION The present invention has been made to solve the problems of the prior art, and provides a method for assigning priorities to operating channels for effective coexistence between frequency sharing systems.

In order to solve the above technical problem, the method for allocating an operation channel priority between frequency sharing systems according to the present embodiment collects information on an operation channel and information on a target white space object (WSO) for priority assignment of an operation channel. An approximate channel priority assignment step of classifying the operational channel according to a predetermined criterion; And a fine channel priority assignment step of removing the channel by checking the interference level of the classified channel.

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

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

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.

The approximately channel priority assignment step may include: an information collection step of collecting information for priority assignment of the operation channel; An operation channel removing step of removing an operation channel used by a coexistence set element of an authorized type among the operation channels; And a priority assignment step of allocating priorities of the operation channels of the non-authorized type coexistence set element among the operation channels.

The assigning of the priority may include: assigning the operating channel to a first group used by a coexistence aggregation element of the same network technology as the target WSO; And a second group allocating step of allocating channels other than the first group to the second group.

It is preferable to assign the priorities to the channels of the first group and the second group in order of decreasing total occupancy.

If the total occupancy is the same, it is preferable to assign the priority in order of the number of coexisting aggregation elements using the same operation channel.

In the fine channel priority assignment step, it is preferable to check the interference level of the operation channel of the first group or the second group to remove the operation channel exceeding a predetermined threshold.

The operating channel priority allocation apparatus between frequency sharing systems according to the present embodiment for solving the technical problem collects information on a target white space object (WSO) and operating channel information for priority allocation of operating channels. An approximate channel priority allocator for classifying the operational channel according to a predetermined criterion; And a fine channel priority allocator for removing a channel by checking an interference level of the classified channel.

 According to the present invention, the method for allocating a priority channel according to the present invention uses a white space object (WSO) which can use only an operation channel without a usable channel or a restriction channel registered in a coexistence manager (CM) entity, so that the frequency sharing system is used. It can improve the effective coexistence between the liver.

1 shows a structure of a coexistence management system for managing a frequency sharing device.
2 is a flowchart illustrating a method for allocating operating channel priorities among frequency sharing systems.
3 is a detailed flowchart illustrating a method for allocating operating channel priorities among frequency sharing systems.
4 is a diagram illustrating a message transmission / reception process based on request / response.
5 is a diagram illustrating an indication-based message transmission and 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 frequency band already in use, such as in a TV band in a communication system, such as a Cognitive Radio (CR) system, an IEEE 802.19 based system. The present invention relates to a coexistence management system for efficiently detecting a frequency sharing device by detecting an idle frequency band (WS: white space). Although an IEEE 802.19 based system is described as an example, the method proposed by the present invention can be applied to other communication systems.

In addition, an embodiment of the present invention proposes a method for efficiently managing a frequency sharing device in a TV band by a plurality of different systems coexist in a communication system. Here, in the embodiment of the present invention, each object of the resource management system for sharing the frequency band usable in the communication system coexist, and a plurality of different systems, in particular a system of different communication methods, for example, a wireless access method These devices coexist, sharing the available frequency bands in the frequency bands already in use, such as in the TV bands, thereby improving the use efficiency of frequency resources.

That is, in an embodiment of the present invention, a resource management system for coexistence and frequency sharing between a plurality of different systems in a communication system may share an available frequency band to improve use efficiency of limited frequency resources. Next, the coexistence management system structure for managing the frequency sharing apparatus according to the embodiment of the present invention will be described in more detail with reference to FIG. 1.

1 illustrates a structure of a coexistence management system 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 that provides channel information available to the frequency sharing devices 20 and 20 'The frequency sharing device control system is composed of the following three entities.

A coexistence enabler (CE) hereinafter referred to as 'CE' 200 is present in the frequency sharing device 20 and referred to as a coexistence manager (CM) hereinafter referred to as 'CM') An entity acting as a passage between the 100 and the frequency sharing device 20. Extract context information (wireless 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 transmit it to the CM 100, and the CM. Sends the event information (change of context information of the frequency sharing device 20) requested from the 100, and resets the configuration (elements constituting the device) of the frequency sharing device 20 indicated by the CM 100. It serves to reflect on the sharing device (20).

The CM 100 is an entity that makes important decisions related to frequency sharing such as operating frequency allocation, transmission power allocation, and transmission time allocation to improve frequency sharing efficiency among the plurality of frequency sharing apparatuses 20 and 20 '. The CM 100 may collect channel measurement information and the like through the frequency sharing device. When cooperation with another CM 100 controlling another frequency sharing device 20 is required, information is directly exchanged or coexistence discovery and information server (CDIS: hereinafter referred to as 'CIDS') ( Information can be exchanged. Channel information available to the frequency sharing apparatuses 20 may be obtained from the channel information database 10.

The CDIS 300 is an entity to assist in the decision related to the frequency sharing device control of the CM 100. Receives and saves the necessary information from multiple CMs, and the connected CM sends the necessary information. Channel information available to the frequency sharing apparatuses 20 may be obtained from the channel information database 10.

Hereinafter, a method for allocating an operation channel priority between frequency sharing systems performed by the above-described CM 100 will be described with reference to FIG. 2.

2 is a flowchart illustrating a method for allocating operating channel priorities among frequency sharing systems. Referring to FIG. 2, the method for allocating an operation channel priority between frequency sharing systems according to the present exemplary embodiment may include a coarse channel priority assignment step S100 and a fine channel priority assignment step S200. It includes.

In an approximate channel priority assignment step (S100), information on a target white space object (WSO) and information on an operation channel for priority allocation of an operation channel are collected, and the operation channel is classified according to a predetermined criterion.

In the fine channel priority assignment step (S200), the interference level of the classified channel is checked to remove the channel.

Hereinafter, referring to FIG. 3, FIG. 3 is a detailed flowchart illustrating a method for allocating an operation channel priority between frequency sharing systems. An approximately channel priority assignment step S100 according to the present embodiment includes an information collection step S110, an operation channel removal step S120, and a priority assignment step S130.

The information collecting step S110 collects information for assigning priority of an operation channel. The information on the target WSO collected in the present embodiment includes channel classification information and coexistence set information on the target WSO. In addition, the coexistence set information may include authorization type and network description information of the coexistence set, and the information about the operation channel may include information about the total occupancy of the operation channel and the number of elements of the coexistence set.

That is, roughly the channel priority assignment step (S100) is the channel classification information (coexistence set) and coexistence set information (coexistence set) of the target WSO, the authorization type of the coexistence set elements (coexistence set elements) using the operation channel (license) type), network technology, total occupancy of the operating channel, and coexistence set element.

The operation channel removal step S120 removes an operation channel used by a coexistence set element of a light license type among operating channels.

Priority assignment step (S130) assigns the priority of the operation channels of the coexistence set element of the Unlicense type (Unlicense type) of the operation channels. Furthermore, in the present embodiment, the priority assignment step S130 includes a first group assignment step S132 and a second group assignment step S134.

The first group assignment step S132 assigns an operation channel to a first group used by a coexistence aggregation element of the same network technology as the target WSO.

In the second group allocating step (S134), channels other than the first group are allocated to the second group.

Furthermore, the channels in the first group and the second group assign priorities in order of lowest overall occupancy.

Here, if the total occupancy is the same or similar within a predetermined error range, priority is allocated in the order of the smallest number of coexisting set elements using the same or similar operating channels.

Subsequently, in the fine channel priority assignment step S200, the interference level of the operation channel of the first group or the second group is checked to remove the operation channel exceeding a predetermined threshold.

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.

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

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

A white space object (WSO) 30 which can use only an operation channel transmits CoexistenceReport.request () to the CE 20, and the CE 20 transmits the CM to the CM 100. The CM 100 transmits CoexistenceReport.response () to the CE 20, and the CE 20 forwards to the WSO 30.

5 illustrates a process of transmitting and receiving indication based primitives and messages. As shown in FIG. 5, the indication-based primitives and messages of the mutual coexistence management system are shown in Table 2 in order to implement the proposed method of assigning a priority channel.

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

The CM 100 transmits CoexistenceReportAnnouncement to the CE 20, and the CE 20 transmits CoexistenceReport.indication to the WSO 30.

The above-described operation channel priority allocation method according to the present invention can be used since the WSO (White Space Object) which can use only the operation channel without the available channel or the restriction channel registered in the Coexistence Manager (CM) entity is used for effective channel allocation. Effective coexistence between frequency sharing systems can be improved.

Meanwhile, the method for allocating a channel priority between operating frequency sharing systems of the present invention may be implemented by computer readable codes 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.

Accordingly, the embodiments disclosed in the present invention and the accompanying drawings are not intended to limit the technical spirit of the present invention but to describe the present invention, and the scope of the technical idea of the present invention is not limited by the 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)

An approximately channel priority assignment step of collecting information on a target white space object (WSO) and information on an operation channel for priority allocation of an operation channel, and classifying the operation channel according to a predetermined criterion; And
And a fine channel priority assignment step of removing the channel by checking an interference level of the classified channel. The method of claim 1,
And the information on the target WSO includes channel classification information and coexistence set information on the target WSO. 3. The method of claim 2,
And the coexistence set information includes an authorization type and network description information of the coexistence set. The method of claim 1,
And 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. The method of claim 1,
The approximately channel priority assignment step is
An information collecting step of collecting information for assigning priority of the operation channel;
An operation channel removing step of removing an operation channel used by a coexistence set element of an authorized type among the operation channels; And
And a priority assignment step of allocating priorities of the operation channels of the non-authorized type of coexistence aggregation element among the operation channels. The method of claim 5, wherein
The assigning of the priority may include: assigning the operating 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 assignment step of allocating channels other than the first group to a second group. The method according to claim 6,
And assigning priorities to the channels of the first group and the second group in descending order of total occupancy. The method of claim 7, wherein
And assigning priorities in ascending order of the number of coexisting set elements using the same operation channel when the total occupancy is the same. The method according to claim 6,
The fine channel priority assignment step,
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. An approximately channel priority allocator for collecting information on a target white space object (WSO) and information on an operation channel for priority allocation of an operation channel, and classifying the operation channel according to a predetermined criterion; And
And a fine channel priority allocator for removing a channel by checking an interference level of the classified channel. 11. The method of claim 10,
And the information on the target WSO includes channel classification information and coexistence set information on the target WSO. The method of claim 11,
And the coexistence set information includes an authorization type and network description information of the coexistence set. 11. The method of claim 10,
And the information on the operation channel includes information on the total occupancy of the operation channel and the number of elements of the coexistence set. 11. The method of claim 10,
The approximately channel priority assignment unit,
An information collecting unit collecting information for assigning priority of the operating channel;
An operation channel removal unit for removing an operation channel used by a coexistence set element of an authorized type among the operation channels; And
And a priority allocating unit for allocating priorities of the operating channels of the non-authorized type of coexistence aggregation element among the operating channels. 15. The method of claim 14,
The priority allocator may include: a first group allocator configured to allocate 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 allocator for allocating channels other than the first group to a second group. The method of claim 15,
And assigning priorities to the channels of the first group and the second group in descending order of total occupancy. 17. The method of claim 16,
And assigning priorities in ascending order of the number of coexisting set elements using the same operation channel when the total occupancy is the same. The method of claim 15,
The fine channel priority assignment unit,
And checking the interference level of the operation channel of the first group or the second group to remove an operation channel exceeding a predetermined threshold.

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