KR101853017B1 - System and method for managing resource in communication system - Google Patents

Abstract

The present invention relates to a resource management system and method for managing a plurality of frequency resources to be shared in a communication system including a plurality of systems that do not have usage rights for a first frequency band, A plurality of coexistence managers (CMs) managing the plurality of systems, for coexistence and frequency sharing of the plurality of systems in the usable frequency band, The coexistence manager transmits a first negotiation request message to the coexistence managers adjacent to the coexistence manager, and the first coexistence manager transmits a second negotiation request message to the adjacent coexistence managers in response to the first negotiation request message, And repeatedly transmitting and receiving the first and second negotiation request messages, The first coexistence manager performs a negotiation procedure with the adjacent coexistence managers based on one of an etiquette mode, a round-robin mode, and a competition mode. do.

Description

[0001] The present invention relates to a resource management system and method in a communication system,

The present invention relates to a communication system, and more particularly, to a resource management system and method for managing a plurality of frequency resources to be shared in a communication system.

BACKGROUND ART [0002] In the current communication system, active research is being conducted to provide various quality of service (QoS) services having a high transmission rate to users. In such a communication system, studies are actively conducted to provide a large-capacity service having a variety of QoS using limited resources such as frequency resources. Particularly, due to the development of radio communication technology and the emergence of new wireless communication services, there is a need to use finite frequency resources more efficiently.

In order to increase the utilization efficiency of the limited frequency resources in the communication system, it is desirable to optimize the performance of the communication system, for example, to maximize the spectrum efficiency through multiple access, coding, modulation, information compression, In addition, a frequency sharing scheme has been proposed to increase the use efficiency of frequency resources by using available frequency bands in a frequency band already in use, such as a TV band.

Here, the frequency sharing in a frequency band that can be used in a frequency band that is already in use, such as the above-described TV band, is a frequency that can be used without interfering with a primary license having incumbent usage right for the TV band It is important to detect the usable frequency band by checking whether the frequency band of the first licensee is used in the TV band. In addition, when there are a plurality of different systems to use the usable frequency band detected in the TV band, due to the difference in the communication system between the plurality of different systems, for example, the radio access system, There is a problem in coexistence to use the band.

In other words, in the present communication system, when there are a plurality of different systems to use the usable frequency band detected in the TV band as described above, the plurality of different systems can efficiently detect the usable frequency band There is no specific resource management scheme for using the frequency resources, and in particular, there is no way to efficiently use frequency resources by coexisting systems of different communication systems to use the available frequency band.

Therefore, after a usable frequency band is detected in a frequency band already in use, such as a TV band in a communication system, a plurality of different systems, for example, systems of different communication systems coexist and the detected usable frequency band is efficiently There is a need for a resource management plan for use as a resource.

It is therefore an object of the present invention to provide a resource management system and method in a communication system.

It is another object of the present invention to provide a resource management system and method for efficiently using a plurality of systems coexistence frequency bands available in a frequency band already used in a communication system.

It is another object of the present invention to provide a system and method for managing frequency resources such that a plurality of systems coexist in a communication system to use a frequency band usable in a TV band.

It is another object of the present invention to provide a system and method for managing frequency resources such that a plurality of systems in a communication system use an available frequency band through effective coexistence and frequency sharing in a usable frequency band of a TV band have.

According to an aspect of the present invention, there is provided a resource management system in a communication system including a plurality of systems that do not have usage rights for a first frequency band, A coexistence manager (CM) for managing the plurality of systems for coexistence and frequency sharing of the plurality of systems in the usable frequency band when a usable frequency band is found; A coexistence enabler (CE) for transmitting and receiving the information of the plurality of systems and information of the coexistence manager; And a Coexistence Discovery and Information Server (CDIS) supporting control of the coexistence manager for the plurality of systems; Wherein the coexistence manager includes a plurality of coexistence managers corresponding to the plurality of systems, respectively; In the plurality of coexistence managers, the first coexistence manager negotiates with the coexistence managers adjacent to the coexistence manager based on one of an etiquette mode, a round-robin mode, and a competition mode. And performs a negotiation procedure.

According to another aspect of the present invention, there is provided a method for managing resources of a first frequency band in a communication system including a plurality of systems having no usage right for a first frequency band, A plurality of coexistence managers (CMs) for managing the plurality of systems, for coexistence and frequency sharing of the plurality of systems in the usable frequency band, A first coexistence manager transmits a first negotiation request message to coexistence managers adjacent to the first coexistence manager; Receiving, by the first coexistence manager, a second negotiation request message from the adjacent coexistence managers in response to the first negotiation request message; And the first and second negotiation request messages are repeatedly transmitted and received so as to allow the first coexistence manager to receive a mode based on one of an etiquette mode, a round-robin mode, and a competition mode, And performing a negotiation procedure with the adjacent coexistence managers.

The present invention manages frequency resources such that a plurality of systems in a communication system use an available frequency band in a frequency band already in use, such as a TV band, through coexistence and frequency sharing, The utilization efficiency of frequency resources can be improved.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is a diagram schematically illustrating the structure of a resource management system in a communication system according to an embodiment of the present invention; Fig.
2 is a view schematically showing negotiation of a resource management system in a communication system according to an embodiment of the present invention;
FIG. 3, FIG. 5, and FIG. 6 are diagrams schematically illustrating a negotiation procedure of a resource management system in a communication system according to an embodiment of the present invention;
4 is a view for explaining time sharing unit information in a contention mode of a resource management system in a communication system according to an embodiment of the present invention;

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. In the following description, only parts necessary for understanding the operation according to the present invention will be described, and the description of other parts will be omitted so as not to disturb the gist of the present invention.

The present invention can be applied to a frequency band that is already in use, such as in a communication system, such as a cognitive radio (CR) system, an IEEE 802.19 based system, or an IEEE 802.22 based system, A resource management system and method for detecting and using a usable frequency band, e.g., an unused frequency band (WS), is proposed. Although the CR system and the IEEE 802.19 and IEEE 802.22 based systems are described as an example in the embodiment of the present invention, the resource management scheme proposed in the present invention can be applied to other communication systems.

In addition, the embodiment of the present invention proposes a resource management system and method for efficiently using a frequency band usable in a TV band by coexistence of a plurality of different systems in a communication system. 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. Herein, in the embodiment of the present invention, a frequency in a usable frequency band is shared in a frequency band that is already in use, such as a TV band, and a primary license having an exclusive use right for the TV band Since it is necessary to use the usable frequency band without interference, it is possible to detect a usable frequency band by checking whether the frequency band of the first licensee is used in the TV band, and to use the usable frequency band detected in the TV band A plurality of different systems selecting and using an operating channel in the detected usable frequency band through coexistence and frequency sharing. In other words, 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 selects an operation channel in WS for effective coexistence, To effectively select a channel, the available channels in the WS are classified and allocated channels.

Here, the resource management system performs a message transmission / reception procedure for efficient coexistence and frequency sharing among a plurality of systems different from each other in a band available in the TV band, i.e. TVWS. In other words, the resource management system transmits and receives messages among the objects of the resource management system for effective coexistence and frequency sharing of the plurality of systems using the TVWS, in particular, registration, coexistence information collection coexistence information gathering, coexistence decision making, reconfiguration, measurement, and event, so that the coexistence and frequency sharing efficiency of the plurality of systems in the TVWS .

That is, in the resource management system according to the embodiment of the present invention for effective coexistence and frequency sharing of a plurality of systems in the TVWS, a registration procedure and a message in the registration procedure are defined, a coexistence information gathering procedure, and a message in the coexistence information collection procedure. In the resource management system, a message in the coexistence decision making procedure and the coexistence decision making procedure is defined, a reconfiguration procedure and a message in the reconfiguration procedure are defined, and a management procedure a measurement procedure, a message in the management procedure, an event procedure, and a message in the event procedure, respectively. That is, for effective coexistence and frequency sharing in the TVWS of the plurality of systems, each defined message is transmitted and received between the respective objects of the resource management system as described above to perform each of the defined procedures, Thereby improving the coexistence and frequency sharing efficiency of the plurality of systems. Hereinafter, the resource management system in the communication system according to the embodiment of the present invention will be described in more detail with reference to FIG.

1 is a diagram schematically illustrating a structure of a resource management system in a communication system according to an embodiment of the present invention.

1, when a plurality of systems having different usable frequency bands, i.e., TVWS, are used by a plurality of systems, such as a TV band, For example, a TV band device (TVBD) 1 140 and a TVBD 2 160, which are intended to use the usable frequency band through sharing, A CM1 120 and a CM2 130 for managing the TVBDs 140 and 160 to improve the frequency sharing efficiency between the CMDs 140 and 160, A coexistence enabler (CE) is included in the TVBDs 140 and 160, or independently located, and serves as a channel between the TVBDs 140 and 160 and the CMs 120 and 130. [ ) For example, CE1 140 and CE2 170, a server supporting the control of the TVBs 140 and 160 of the CMs 120 and 130, for example, a coexistence discovery and information server (CDIS) And a TVWS DB (TVWS DB) 180 for providing channel information for the TVWS, which can be used in the TV band, do. Here, the resource management system includes CE, CM, CDIS, and TVWS DB as objects for coexistence and frequency sharing in TVWS of a plurality of systems, i.e., TVBDs.

As described above, the TVBDs 140 and 160 may be configured so that a primary licensee (hereinafter, referred to as a 'Primary System') having a preferential usage right for the TV band already has a predetermined When a frequency band is not used, another user (hereinafter, referred to as a 'secondary system') not having a preferential right to use the TV band is allowed to use a frequency band capable of using a predetermined frequency band in the TV band Quot; refers to a plurality of different systems, that is, sub-systems devices, which are to be detected and used in a band. Here, the TVBDs 140 and 160 share the predetermined frequency band through coexistence and frequency sharing in order to more efficiently use the limited frequency resources. That is, the TVBDs 140 and 160 receive channels through the TVWS and transmit and receive data.

As described above, the CEs 150 and 160 are independently located in the TVBDs 140 and 160, and transmit and receive information of the TVBDs 140 and 160 and information of the CMs 120 and 130, respectively. Although the CEs 150 and 160 are independently provided in the TVBDs 140 and 160 for convenience of description, the CEs 150 and 160 may include the TVBDs 140 and 160 Or may be included in the CMs 120 and 130. [

The CEs 150 and 160 may transmit context information related to the corresponding TVBDs 140 and 160 requested by the CMs 120 and 130 such as the radio access scheme, A threshold, and a position, from the TVBDs 140 and 160, and transmits the extracted information to the CMs 120 and 130. That is, the CEs 150 and 160 acquire communication-related information of each system as context information for different subsystems, and transmit the information to the CMs 120 and 130.

The CEs 150 and 160 receive a request of the CMs 120 and 130 for managing the TVBDs 140 and 160, for example, the context information and the configuration of the TVBDs 140 and 160 Updates the context information of the TVBDs 140 and 160 according to the request, and reconfigures or reconfigures the configuration of the TVBDs 140 and 160. In other words, the CEs 150 and 160 receive the changed information of the context information, that is, the event information of the TVBDs 140 and 160 in response to the context information of the TVBDs 140 and 160, And updates the context information of the TVBDs 140 and 160. The CEs 150 and 160 may also receive a component reset of the TVBDs 140 and 160 in response to a request for a configuration of the TVBDs 140 and 160 and may configure the components of the TVBDs 140 and 160 The element is reset, i.e., reconstructed.

The CMs 120 and 130 determine an operation frequency allocation, a transmission power allocation, and a transmission time allocation in order to improve frequency sharing efficiency between the TVBDs 140 and 160. In other words, the CMs 120 and 130 may be connected to the TVBs 140 and 160 in the available frequency band to improve the frequency sharing efficiency between the TVBDs 140 and 160 for the available frequency bands in the TV band described above. Performs operation frequency allocation, transmission power allocation, and transmission time allocation.

In order to further improve the frequency sharing efficiency between the TVBDs 140 and 160, the CMs 120 and 130 transmit and receive information to and from CMs of TVBDs that do not correspond to themselves, for example, neighboring CMs Transmits context information and event information of TVBDs, and performs operation frequency allocation, transmission power allocation, and transmission time allocation of the corresponding TVBD in the usable frequency band. At this time, the CMs 120 and 130 directly transmit and receive context information and event information of TVBDs that do not correspond to the CMs 120 and 130 with other CMs (for example, adjacent CMs) And acquires them. In addition, the CMs 120 and 130 may acquire information on spectrum use in the main system, that is, channel information about available channels in the TV band, through an external database, for example, the TVWS DB 180, To reset the components of their corresponding TVBDs.

The CDIS 110 supports control operations of the CMs 120 and 130 for frequency sharing of the TVBDs 140 and 160 with respect to frequency bands available in the TV band, as described above. That is, the CDIS 110 receives and stores the context information and the event information of the TVBDs 140 and 160 from the CMs 120 and 130. The CDIS 110 receives the context information and the event information of the TVBDs 140 and 160 from the CMs 120 and 130, To the CMs (120 and 130). In addition, the CDIS 110 acquires and stores information on spectrum use in the main system, that is, channel information on available channels in the TV band, through an external database, for example, the TVWS DB 180.

The TVWS DB 180 provides channel information on a channel available in the TVWS, that is, shared channel information, to the CMs 120 and 130. The channel information is registered in the TVWS DB 180, TVBD < / RTI >

The resource management system in the communication system according to this embodiment of the present invention uses a frequency band that can be used in a frequency band already used in a main system such as a TV band by sharing the sub-systems, that is, coexistence of the TVBDs 140 and 160 The CDIS 110, the CMs 120 and 130, and the CEs 140 and 160 for frequency sharing and frequency sharing. As described above, the TVBDs 140 and 160 are sub-systems devices for sharing and using the available frequency band. The TVBDs 140 and 160 include a base station (BS), an access point An access point (AP), a service access point (SAP), a terminal, and the like. In addition, the sub systems may be a plurality of systems different from each other in sharing available frequency bands as described above, and may be systems of different communication systems, such as an IEEE 802.19-based system and an IEEE 802.22-based system .

Also, in the communication system according to the embodiment of the present invention, for the coexistence and frequency sharing of the TVBDs 140 and 160 with respect to the usable frequency band in the frequency band already in use, For example, for efficient coexistence and frequency sharing of a plurality of systems, e.g., the TVBDs 140 and 160, to enable the plurality of systems in the TVWS to effectively coexist and improve frequency utilization efficiency through frequency sharing.

At this time, the resource management system is operated in a management mode and an autonomous mode (or an information mode), and the setting and the configuration of the frequency sharing device indicated by the CM in the management mode, i.e., TVBD, And the CE is made to make coexistence and frequency sharing decisions on the basis of the coexistence and frequency sharing related information provided by the CM in the autonomous mode and the coexistence and frequency sharing decision is reset to the setting and configuration of the TVBD To the TBVD. In addition, the resource management system is operated in a centralized topology and a distributed topology, and in the centralized topology, a plurality of CMs are provided with a plurality of A slave CM is connected, and the slave CMs are under the control of the master CM for coexistence and frequency sharing among the TVBDs. In the distributed topology, a plurality of CMs perform coexistence and frequency sharing among TVBDs through negotiation between any one CM and adjacent CMs of the one CM.

In the communication system according to the embodiment of the present invention, for the coexistence and frequency sharing of the TVBDs 140 and 160 with respect to the usable frequency band in the frequency band already in use, the resource management system may use the centralized topology or distributed CE1 150 and CM1 120 and neighboring other sharing devices such as TVBD2 160 and CE2 170. In this case, the neighboring frequency sharing device, i.e., a predetermined TVBD such as TVBD1 140, CE1 150, , And CM2 (130). Here, in the resource management system, for the coexistence and frequency sharing of the TVBDs 140 and 160, the CM1 120 negotiates with the adjacent CM2 130, and at this time, the TVBD2 registered in the CM2 130 CM1 120, which is the host CM, as a TVBD that mutually interferes with the TVBD1 140 registered in the CM1 120 (hereinafter, referred to as a host CM) And the CM 2 130, which is an adjacent CM, through the negotiation between the TVBs 140 and 160.

In addition, the resource management system in the communication system according to the embodiment of the present invention may include a frequency sharing device, for example, the TVBDs (120) and the CMDs The CM1 120, the host CM 120, and the TVBD 140 may be controlled based on an etiquette mode in which the TVBs 140 and 160 use frequencies independent of each other, And the CM2 130, which is the adjacent CM. When the available frequency band is smaller than the frequency band that the TVBDs 140 and 160 want to use, the resource management system performs time division multiplexing (TDM) between the TVBDs 140 and 160 Negotiates between the CM1 120, which is the host CM, and the CM2 130, which is the adjacent CM, based on a contention mode using the 'CM1' method. The contention mode using the TDM scheme may be a round-robin mode in which all CMs are allocated resources (e.g., time slots) in proportion to the number of adjacent TVBDs, and a round- And a competition mode in which each time slot is sequentially allocated according to the contention number using a contention number. Hereinafter, the negotiation operation of the resource management system in the communication system according to the embodiment of the present invention will be described in more detail with reference to FIG.

2 is a diagram schematically illustrating a negotiation operation of a resource management system in a communication system according to an embodiment of the present invention. Here, FIG. 2 is a flowchart illustrating a method of performing a negotiation operation based on an etiquette mode, a round-robin mode, and a competition mode in a communication system according to an embodiment of the present invention. Fig.

Referring to FIG. 2, in step 205, the host CM of the resource management system transmits a TVBD registered in a neighboring frequency sharing system, that is, a CM adjacent to the host CM itself, for example, (inter-CM) neighbor TVBDs, and updates the channel list used by the TVWS.

Then, in step 210, the user selects the etiquette mode in the etiquette mode, the round-robin mode, and the competition mode described above, and then, in the etiquette mode, Determines an operation channel list, and negotiates with the adjacent CMs based on the determined operation channel list in the etiquette mode.

If it is determined in step 215 that the negotiation in the etiquette mode is successful and the negotiation fails in the etiquette mode as a result of the checking in step 215, Determining a working channel list, a time sharing unit, and a time slot position after selecting the round-robin mode, in a round-robin mode and a competition mode, Negotiates with the neighboring CMs based on the operation channel list in the round-robin mode, the time sharing unit, and the time slot position.

Next, in step 225, it is confirmed whether or not the negotiation in the round-robin mode is successful. If the negotiation in the round-robin mode is unsuccessful as a result of the checking in step 225 In operation 230, after selecting the competition mode, the operation channel list, the time sharing unit, and the unused timeslot position are determined, and the operation channel list of the determined competition mode, the time sharing unit And negotiates with the adjacent CMs based on the unused timeslot location. 3 to 6, the negotiation procedure in the etiquette mode, the round-robin mode, and the competition mode of the resource management system in the communication system according to the embodiment of the present invention Will be described in more detail.

3 is a diagram schematically illustrating a negotiation procedure of a resource management system in a communication system according to an embodiment of the present invention. 3 is a diagram schematically illustrating a negotiation procedure based on an etiquette mode of a resource management system in a communication system according to an embodiment of the present invention. 3 schematically shows a message transmission / reception flow for negotiation in an etiquette mode using independent frequencies among the TVBDs when idle frequencies, that is, TVWSs, are larger than frequency sharing systems, i.e. TVBDs FIG.

Referring to FIG. 3, in order to allow coexistence and frequency sharing in the TVWS, the host CM 302 performs a negotiation between a host CM and an adjacent CM based on an etiquette mode. In this etiquette mode, The channel classification and registration information of the TVBDs registered in the CM 302 and the adjacent CM 304 are updated, that is, the list of available channels and TVBDs is updated to determine the operation channel list ( Step 310).

The host CM 302 transmits a Negotiation_Request message to the adjacent CM 204 in order to negotiate with the CMs adjacent to the CM in the etiquette mode (Step 312).

The neighboring CM 304 may also receive the Negotiation_Request message received from the host CM 302 in a channel of TVBDs registered in the host CM 302 and the neighboring CM 304 in the etiquette mode, In operation 314, the channel classification and the registration information are updated, that is, the list of the available channel list and the TVBD is updated to determine the operation channel list.

Then, the neighboring CM 304 transmits a Negotiation_Request message to the host CM 302 in response to the Negotiation_Request message received from the host CM 302 (step 316).

Here, the Negotiation_Request message is a message used for negotiation between the host CM 302 and the adjacent CM 304, and is used for negotiation between CMs in the etiquette mode for coexistence and frequency sharing among TVBDs. For example, a channel list according to channel classification, for example, an operation channel list, a usable channel list, and a supportable channel list. That is, the Negotiation_Request message is a message for providing negotiation related information of the host CM 302 and requesting negotiation related information of the adjacent CM 304 when the host CM 302 transmits the Negotiation_Request message, When the adjacent CM 304 transmits, it provides a negotiation-related information of the adjacent CM 304 and a negotiation-related information of the host CM 302. In addition, the Negotiation_Request message includes contents, i.e., a header and a payload of the Negotiation_Request message, and a data type.

The payload of the Negotiation_Request message includes a negotiation status, and the negotiation status is defined as negotiation success, negotiation failure, and under negotiation.

In addition, negotiation information is included in the payload of the Negotiation_Request message. The negotiation information includes mode information indicating time scheduling, operating channel list information, time sharing unit information time sharing unit information, slot time position information, number of slots information, disallowed slot time position information, and a list of contention number information). Here, the time sharing unit information is defined as a reference time, a window time, and a slot time, and the reference time may be synchronized with other frequency sharing systems, The window time is a repeated transmission period, and the slot time is a basic unit of the window time. Here, the time sharing unit information, that is, the round-robin mode of the contention mode using the TDM scheme, which will be described later, and the time sharing unit information in the competition mode are as shown in FIG. 4 .

4, the time sharing unit information is defined as a reference time 410, a window time 420, and a slot time 430. As described above, Is used for synchronization with a shared system, that is, with other TVBDs, the window time is a repeated transmission period, and the slot time is a basic unit of window time. 4 is a diagram for explaining time sharing unit information in a contention mode of a resource management system in a communication system according to an embodiment of the present invention.

In addition, the host CM 302 may use the Negotiation_Request message received from the neighboring CM 304 to transmit the channel of the TVBDs registered in the host CM 302 and the adjacent CM 304 in the etiquette mode, The classification and registration information is updated to determine the operation channel list (step 318).

As described above, the host CM 302 and the neighboring CM 304 repeatedly transmit and receive the Negotiation_Request message including the negotiation-related information, and the negotiation-related information included in the Negotiation_Request message repeatedly transmitted and received, In particular, updates the channel classification and registration information of the TVBDs registered in the host CM 302 and the adjacent CM 304 through the channel list information, i.e., updates the list of available channel lists and TVBDs, At this time, the usable channel is checked and determined. If negotiation between the host CM 302 and the adjacent CM 304 in the etiquette mode is performed when the number of times of transmission / reception of the Negotiation_Request message exceeds a preset number or the available channel does not exist It determines that it has failed and performs negotiation in a round-robin mode, as described above.

If the negotiation between the host CM 302 and the adjacent CM 304 is successful due to the existence of the available channel in the etiquette mode, the host CM 302 determines that the negotiation state is included in the successful negotiation The negotiation is completed in the etiquette mode by receiving the set Negotiation_Request message from the adjacent CM 304 in operation 320.

That is, as described above, the host CM 302 updates the channel classification and registration information of the TVBD registered in the host CM 302 and the adjacent CM 304, and transmits the Negotiation_Request message At this time, if the number of transmission / reception of the Negotiation_Request message exceeds the predetermined number, negotiation failure in the etiquette mode is determined to be failure. If the neighbor CM 304 requests an operation channel list change through the Negotiation_Request message and there is no change in the registration information, the host CM 302 performs an operation requested by the neighbor CM 304 If the operation channel list requested by the adjacent CM 304 can not be selected, a channel available in the channel classification is checked to select an operation channel list.

In addition, the host CM 302 checks the list of the supportable channels of the registered TVBDs, checks the available channels in the list of available channels, and selects the operating channel list. Then, the host CM 302 checks the network type of the registered TVBDs, and checks an available channel satisfying the corresponding network type to select an operation channel list. Also, the host CM 302 checks a required bandwidth of the registered TVBDs, and then checks an available channel satisfying the requested bandwidth to select an operation channel list.

The host CM 302 repeatedly transmits and receives the Negotiation_Request message including the information on the selected operation channel list as the negotiation related information to the adjacent CM 304 to perform negotiation in the etiquette mode At this time, if the usable channel does not exist, it is determined that negotiation fails in the etiquette mode, and negotiation is performed in a round-robin mode as described above. Hereinafter, the negotiation procedure in the round-robin mode of the resource management system in the communication system according to the embodiment of the present invention will be described in more detail with reference to FIG.

5 is a diagram schematically illustrating a negotiation procedure of a resource management system in a communication system according to an embodiment of the present invention. 5 is a diagram schematically illustrating a negotiation procedure based on a round-robin mode of a resource management system in a communication system according to an embodiment of the present invention. 5 shows that the TVBDs use the same frequency, and that all the CMs have resources (e.g., time slots) in proportion to the number of adjacent TVBDs FIG. 2 is a schematic diagram illustrating a message transmission / reception flow for negotiation in an allocated round-robin mode. FIG.

5, for the coexistence and frequency sharing in the TVWS, the host CM 502 is configured to perform a negotiation between the host CM 502 and the adjacent CMs based on the round-robin mode, ) And updating the channel classification and registration information of the TVBDs registered in the adjacent CM 504, i.e. updating the list of available channel lists and TVBDs, and updating the list of available channel lists and TVBDs for the round- A time-sharing unit, and a time slot position in a round-robin mode, e.g., in a round-robin mode (operation 510).

In step 512, the host CM 502 transmits a Negotiation_Request message for negotiating with all the CMs adjacent to itself in the round-robin mode to the neighboring CM 504.

In addition, the adjacent CM 504 uses the Negotiation_Request message received from the host CM 502 to classify channel classification of TVBDs registered in the host CM 502 and the adjacent CM 504, Update the registration information, i. E. Update the list of available channel lists and TVBDs, and update the parameters of the round-robin mode for the registered TVBDs, for example the round- -robin mode, a time sharing unit, and a time slot position in step 514.

Then, the neighboring CM 504 transmits a Negotiation_Request message to the host CM 502 in response to the Negotiation_Request message received from the host CM 502 (step 516).

Herein, the Negotiation_Request message is a message used for negotiation between the host CM 502 and the neighboring CM 504, and is used for the coexistence and frequency sharing among the TVBDs. In the round-robin mode, Negotiation-related information among the round-robin mode, time-sharing unit, and time slot position as parameters of the round-robin mode . That is, the Negotiation_Request message is a message for providing the negotiation-related information of the host CM 502 and the negotiation-related information of the neighboring CM 304 when the host CM 502 transmits, When the neighboring CM 504 transmits the message, negotiation-related information of the neighboring CM 504 and negotiation-related information of the host CM 502 are requested. In addition, the Negotiation_Request message includes a header, a payload, and a data type of the content, i.e., the Negotiation_Request message, as described above.

In addition, the host CM 502 uses the Negotiation_Request message received from the neighboring CM 504 to determine whether the round-robin (round the time sharing unit, and the time slot position of the round-robin mode (step 518).

As described above, the host CM 502 and the neighboring CM 504 repeatedly transmit and receive the Negotiation_Request message including the negotiation related information, and also receive the negotiation related information included in the Negotiation_Request message repeatedly transmitted and received, In particular, by updating the operation channel list, the time sharing unit, and the time slot position in the round-robin mode, parameters of the round-robin mode are determined, . If the number of transmission / reception of the Negotiation_Request message exceeds a predetermined number or the available channel does not exist, the host CM 502 and the adjacent CM 504 (504) in the round-robin mode, ), And negotiates in a competition mode, as described above.

If the negotiation between the host CM 502 and the adjacent CM 504 is successful due to the existence of the available channel in the round-robin mode, the host CM 502 determines that the negotiation status is negotiated The negotiation is completed in the round-robin mode by receiving the set Negotiation_Request message including the success from the neighboring CM 504 in operation 520.

That is, as described above, the host CM 502 updates the channel classification and registration information of the TVBD registered in the host CM 502 and the adjacent CM 504, A Negotiation_Request message is transmitted and received by determining parameters in a round-robin mode, e.g., a round-robin mode operation channel list, a time sharing unit, and a time slot position, And determines that the negotiation fails in the round-robin mode if the number of transmission / reception of the round-robin mode exceeds the preset number of times.

When the adjacent CM 504 requests the parameter change in the round-robin mode, for example, requests the change of the operation channel list through the Negotiation_Request message, the host CM 502 transmits the TVBD And selects an operation channel list using the available channel list. Herein, the host CM 502 receives the requested operation channel list change requested by the adjacent CM 504 and selects the requested operation channel list or does not accept the operation channel list change requested by the adjacent CM 504 And selects another operation channel list using the coexistence information of the TVBDs and the available channel list.

When the host CM 502 requests the parameter change of the round-robin mode and requests the change of the time sharing unit, the host CM 502 selects a time sharing unit using the coexistence information of the TVBDs . Here, the host CM 502 selects the requested time sharing unit by accepting the time sharing unit change requested by the adjacent CM 504, or does not accept the time sharing unit change requested by the adjacent CM 504 And selects another time sharing unit using the coexistence information of the TVBDs. At this time, the host CM 502 selects a reference time for synchronization with the other TVBDs, and determines the QoS performance (latency, duty cycle, etc.) based on the sharing information of the TVBD Selects a window time, and selects a position of a type slot satisfying the duty cycle based on the TVBD sharing information.

Then, the host CM 502 selects the number of required time slots using the time sharing unit, the list of adjacent TVBDs, and the coexistence information of the registered TVBDs, The number of time slots, and the coexistence information of the registered TVBDs.

In addition, the host CM 502 may determine the parameters of the round-robin mode, such as the round-robin mode operating channel list, the time sharing unit, Negotiation in the round-robin mode by repeatedly transmitting and receiving the Negotiation_Request message including the negotiation-related information as the negotiation-related information with the adjacent CM 504. At this time, if the usable channel is not present due to failure to select the parameters of the round-robin mode, for example, the operation channel list of the round-robin mode, the time sharing unit, Or if the registered TVBDs do not support time scheduling, it is determined that the negotiation fails in the round-robin mode, and the negotiation is performed in the competition mode as described above. Hereinafter, the negotiation procedure in the competition mode of the resource management system in the communication system according to the embodiment of the present invention will be described in more detail with reference to FIG.

6 is a diagram schematically illustrating a negotiation procedure of a resource management system in a communication system according to an embodiment of the present invention. Here, FIG. 6 is a diagram schematically illustrating a negotiation procedure based on a competition mode of a resource management system in a communication system according to an embodiment of the present invention. 6 shows a case where the TVBDs use the same frequency and the idle frequency, i.e. TVWS, is smaller than that of the frequency sharing system, i.e. TVBDs, and all the CMs use a contention number, FIG. 2 is a diagram schematically illustrating a message transmission / reception flow for negotiation in a competition mode in which each time slot is allocated.

Referring to FIG. 6, in order to allow coexistence and frequency sharing in the TVWS, the host CM 602 performs a negotiation between a host CM 602 and an adjacent CM Updates the channel classification and registration information of the TVBDs registered in the TVBD 604, that is, updates the list of available channel lists and TVBDs, Parameters, e.g., the operation channel list of the competition mode, the time sharing unit, and the unused timeslot position are determined (operation 610).

In step 612, the host CM 602 transmits a Negotiation_Request message for negotiation with all the CMs adjacent to the host CM 602 in the competition mode to the adjacent CM 604.

Also, the adjacent CM 604 may use the Negotiation_Request message received from the host CM 602 to classify the channel classification of the TVBDs registered in the host CM 302 and the adjacent CM 304, Update the registration information, i. E. Update the list of available channel lists and TVBDs, and update the parameters of the competition mode for the registered TVBDs, e. G. , A time sharing unit, and an unused time slot position (step 614).

In step 616, the neighbor CM 604 transmits a Negotiation_Request message to the host CM 602 in response to the Negotiation_Request message received from the host CM 602.

Here, the Negotiation_Request message is a message used for negotiation between the host CM 602 and the adjacent CM 604. The Negotiation_Request message is used to negotiate between the CMs in the competition mode for coexistence and frequency sharing among the TVBDs. Information, a parameter for the competition mode, and a request message for requesting and providing an operation channel list of a competition mode, a time sharing unit, and an unused time slot position. That is, the Negotiation_Request message is a message for providing negotiation-related information of the host CM 602 and requesting negotiation-related information of the neighboring CM 604 when the host CM 602 transmits the Negotiation_Request message, When the adjacent CM 604 transmits, it provides the negotiation related information of the adjacent CM 604 and the negotiation related information of the host CM 602. In addition, the Negotiation_Request message includes a header, a payload, and a data type of the content, i.e., the Negotiation_Request message, as described above.

In addition, the host CM 602 may use the Negotiation_Request message received from the neighboring CM 604 to compute the operation channel list of the competition mode for the host CM 602 in the competition mode, , The time sharing unit, and the unused timeslot position (step 618).

As described above, the host CM 602 and the neighboring CM 604 repeatedly transmit and receive the Negotiation_Request message including the negotiation-related information, and the negotiation-related information included in the Negotiation_Request message repeatedly transmitted and received, In particular, by updating the operation channel list, the time sharing unit, and the unused time slot position of the competition mode, parameters of the competition mode are determined, and the available channels are checked and determined. If the number of times of transmission / reception of the Negotiation_Request message exceeds a predetermined number or the available channel does not exist, negotiation between the host CM 602 and the adjacent CM 604 in the competition mode is performed It is judged as failed, and a new TVWS is searched.

If the negotiation between the host CM 602 and the adjacent CM 604 is successful due to the existence of the available channel in the competition mode, the host CM 602 determines that the negotiation status is included in the successful negotiation And receives the set Negotiation_Request message from the adjacent CM 604 (step 620).

The host CM 602 then uses the Negotiation_Request message to determine the parameters of the competition mode as a result of the negotiation success, for example, the operation channel list of the competition mode, the time sharing unit, (Step 622). In step 622, it is determined whether or not the time slot position is not negotiated.

Also, the host CM 602 informs all adjacent CMs of the negotiation success result. That is, in order to notify the neighboring CMs of the negotiation result, the host CM 602 transmits a negotiation result including notification parameters in accordance with the successful negotiation, for example, a negotiated CM list, a time sharing unit, And transmits a Negotiation_Announcement (hereinafter referred to as 'Negotiation_Announcement') message to the adjacent CM 604 (step 624).

Herein, the Negotiation_Announcement message is a message for notifying all CMs adjacent to the host CM 602 of the negotiation result after the completion of the negotiation, and the negotiation result information between the host CM 602 and the adjacent CMs, And the like. In addition, the Negotiation_Announcement message includes a header, a payload, and a data type of the content, i.e., the Negotiation_Announcement message.

That is, as described above, the host CM 602 updates the channel classification and registration information of the TVBD registered in the host CM 602 and the adjacent CM 604, determines the parameters of the competition mode, for example, the operation channel list of the competition mode, the time sharing unit, and the unused timeslot position, and transmits and receives the Negotiation_Request message. At this time, If it exceeds the set number of times, it is determined that the negotiation fails in the competition mode.

In addition, when the neighbor CM 604 requests the parameter change of the competition mode through the Negotiation_Request message, for example, to change the operation channel list through the Negotiation_Request message, the host CM 602 transmits the coexistence information of the TVBDs, And selects the operation channel list using the available channel list. Herein, the host CM 602 receives the requested operation channel list change requested by the adjacent CM 604 and selects the requested operation channel list, or does not accept the operation channel list change requested by the adjacent CM 604 And selects another operation channel list using the coexistence information of the TVBDs and the available channel list.

When the host CM 602 requests the parameter change of the competition mode and requests the change of the time sharing unit, the host CM 602 selects the time sharing unit using the coexistence information of the TVBDs. Herein, the host CM 602 receives the time sharing unit change requested by the adjacent CM 604 and selects the requested time sharing unit, or does not accept the time sharing unit change requested by the adjacent CM 604 And selects another time sharing unit using the coexistence information of the TVBDs. At this time, the host CM 602 selects a reference time for synchronization with the other TVBDs, and determines the QoS performance (latency, duty cycle, etc.) based on the TVBD sharing information Selects a window time, and selects a position of a type slot satisfying the duty cycle based on the TVBD sharing information.

Then, the host CM 602 checks the unused time slot positions using the time sharing unit, the list of adjacent TVBDs, and the coexistence information of the registered TVBDs. Then, the host CM 602 generates a list of the number of contents using the random number generator.

That is, the host CM 602 checks the location of unused time slots in all adjacent TVBDs and the number of contents, checks the time sharing unit determined by the negotiation between adjacent CMs 604, Selects a CM list in which the negotiation has been successful, and sequentially selects the CM list in which the negotiation has been successful according to the CM order having a large number of contends, And selects a timeslot location list using the shared unit. Therefore, the host CM 602 completes the negotiation in the competition mode manner, and the host CM 602 notifies the neighboring CMs of the negotiation result, that is, the notification parameters according to the negotiation success, For example, a Negotiation_Announcement message including the successfully negotiated CM list, the time sharing unit, and the time slot location list to the adjacent CM 604.

In this way, the resource management system in the communication system according to the embodiment of the present invention is able to perform an etiquette mode, a round-robin mode, and a round-robin mode among other CMs adjacent to any CM for coexistence and frequency sharing in TVWS And Negation_Request message until the negotiation is completed, and when the negotiation is completed, the Negotiation_Announcement message is transmitted / received so that the CMs adjacent to the CM can negotiate based on the competition mode and the competition mode, And supports coexistence and frequency sharing among a plurality of systems, i.e., TVBDs.

While the invention has been shown and described with reference to certain preferred embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Therefore, the scope of the present invention should not be limited by the described embodiments, but should be determined by the scope of the appended claims, as well as the appended claims.

Claims (20)

CLAIMS What is claimed is: 1. A resource management system in a communication system including a plurality of systems that do not have usage rights for a first frequency band,
A coexistence manager (CM) for managing the plurality of systems for coexistence and frequency sharing of the plurality of systems in the usable frequency band when a frequency band in which the plurality of systems are available in the first frequency band is found; );
A coexistence enabler (CE) for transmitting and receiving the information of the plurality of systems and information of the coexistence manager; And
And a coexistence discovery and information server (CDIS) supporting control of the coexistence manager for the plurality of systems;
Wherein the coexistence manager includes a plurality of coexistence managers corresponding to the plurality of systems, respectively;
In the plurality of coexistence managers, the first coexistence manager may communicate with at least one second coexistence manager adjacent to the first coexistence manager in one of an etiquette mode, a round-robin mode, and a competition mode. A negotiation procedure is carried out based on the negotiation procedure,
The first coexistence manager updates the channel classification information and the information of the plurality of systems in the etiquette mode after selecting the etiquette mode when the usable frequency band is larger than a frequency band to be used by the plurality of systems And a negotiation procedure with the at least one second coexistence manager is performed after determining an operation channel list in the etiquette mode.
delete The method according to claim 1,
Wherein the first coexistence manager checks the usable channel list, the supportable channel list, the network type, and the requested bandwidth of the plurality of systems in the channel classification information to determine the operation channel list Management system.
The method of claim 3,
Wherein the first coexistence manager transmits a first negotiation request message including negotiation-related information according to the operation channel list to the adjacent at least one second coexistence manager; Receiving, in response to the first negotiation request message, a second negotiation request message including negotiation-related information according to the operation channel list determined by the adjacent at least one second coexistence manager, from the adjacent at least one second coexistence manager Wherein the resource management system comprises:
5. The method of claim 4,
Wherein the first coexistence manager uses the second negotiation request message and the adjacent at least one second coexistence manager uses the first negotiation request message to transmit channel classification information in the etiquette mode and the plurality of systems And updates the information.
The method according to claim 1,
Wherein the first coexistence managers select the round-robin mode when the usable frequency band is smaller than the frequency band to be used by the plurality of systems, and then select the channel classification information in the round- And a negotiation procedure is performed with the at least one second coexistence manager after determining the operation channel list, the time sharing unit, and the time slot position in the round-robin mode by updating the information, system.
The method according to claim 6,
Wherein the first coexistence manager checks the usable channel list in the channel classification information and determines the operation channel list using the usable channel list and the information of the plurality of systems. .
8. The method of claim 7,
Wherein the first coexistence manager determines a time sharing unit using information of the plurality of systems, checks a list of the plurality of systems from the information of the plurality of systems, Using a list of systems and information to determine the number of time slots required.
9. The method of claim 8,
Wherein the first coexistence manager determines the location of the time slot by determining the location of the time slot based on the time sharing unit, the number of required time slots, and the information of the plurality of systems. Management system.
10. The method of claim 9,
The first coexistence manager transmits a first negotiation request message including negotiation-related information according to the operation channel list, the time sharing unit, and the time slot position to the adjacent at least one second coexistence manager; A second negotiation request message including negotiation-related information according to an operation channel list, a time sharing unit, and a time slot position determined by the adjacent at least one second coexistence manager in response to the first negotiation request message, From the second coexistence manager.
11. The method of claim 10,
Wherein the first coexistence manager uses the second negotiation request message and the adjacent at least one second coexistence manager uses the first negotiation request message to transmit channel classification information in the round- And updates the information of the systems.
The method according to claim 6,
Wherein in the round-robin mode, the plurality of systems use the same frequency, and the adjacent at least one second coexistence manager is allocated a timeslot in proportion to the number of adjacent systems. . The method according to claim 1,
The first coexistence managers update the channel classification information and the information of the plurality of systems in the contention mode in a case where the usable frequency band is smaller than the frequency band to be used by the plurality of systems And a negotiation procedure with the at least one second coexistence manager after determining the operation channel list, the time sharing unit, and the unused time slot position in the contention mode.
14. The method of claim 13,
Wherein the first coexistence manager checks an available channel list in the channel classification information and determines an operation channel list by using the available channel list and the information of the plurality of systems.
15. The method of claim 14,
Wherein the first coexistence manager determines a time sharing unit using information of the plurality of systems, checks a list of the plurality of systems from the information of the plurality of systems, A list of the unused time slots and the number of contention numbers is checked using the list of systems and information, and a list of successful coexistence managers and a slot time is determined Resource management system.
16. The method of claim 15,
The first coexistence manager transmits a first negotiation request message including negotiation-related information according to the operation channel list, the time sharing unit, and the unused time slot position to the adjacent at least one second coexistence manager; In response to the first negotiation request message, a second negotiation request message including negotiation related information based on the operation channel list, the time sharing unit, and the unused time slot position determined by the adjacent at least one second coexistence manager And receives from the at least one second coexistence manager adjacent thereto.
17. The method of claim 16,
Wherein the first coexistence manager uses the second negotiation request message and the adjacent at least one second coexistence manager uses the first negotiation request message to transmit channel classification information in the contention mode and the plurality of systems And updates the information. 16. The method of claim 15,
Wherein the first coexistence manager transmits a negotiation notification message including the list of coexistence managers that succeeded in the negotiation procedure and the negotiation result information in accordance with the location of the slot time to the adjacent at least one second coexistence manager system.
14. The method of claim 13,
Wherein in the contention mode, the plurality of systems use the same frequency, and the plurality of coexistence managers are sequentially assigned time slots according to a contention number.
A method for managing resources of a first frequency band in a communication system including a plurality of systems that do not have usage rights for a first frequency band,
A plurality of coexistence managers (CMs) for managing the plurality of systems, for coexistence and frequency sharing of the plurality of systems in the usable frequency band, The first coexistence manager transmits a first negotiation request message to at least one second coexistence manager adjacent to the coexistence manager;
Receiving, by the first coexistence manager, a second negotiation request message from the adjacent at least one second coexistence manager, in response to the first negotiation request message; And
Wherein the first coexistence manager repeatedly transmits and receives the first and second negotiation request messages to determine whether the first coexistence manager is based on one of an etiquette mode, a round-robin mode, and a competition mode And performing a negotiation procedure with the at least one second coexistence manager,
When the usable frequency band is larger than a frequency band to be used by the plurality of systems, selecting the etiquette mode, updating channel classification information and information of the plurality of systems in the etiquette mode, Determining a channel list, and then performing the negotiation procedure with the at least one second coexistence manager.

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