KR20120076321A - System and method for managing resource in communication system - Google Patents

Abstract

PURPOSE: A resource management system in a communication system and method thereof are provided to improve the usage efficiency of frequency resources by transmitting and receiving a negotiation announcement message. CONSTITUTION: A CM(Coexistence Manager)(120,130) respectively corresponds to plural systems. Plural CMs are existed. A first CM executes a negotiation procedure with neighbor CMs(Coexistence Managers) based on an etiquette mode, a round-robin mode, or a competition mode. The CMs are existed. A CDIS(Coexistence Discovery and Information Server)(110), the CM, and CE(Coexistence Enabler)(150,170) respectively transmit and receive messages.

Description

System and method for managing resource in communication system

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

In the current communication system, active researches are being conducted to provide users with services of various quality of service (QoS) having a high transmission speed (hereinafter referred to as 'QoS'). In such a communication system, studies are being actively conducted to provide a large capacity service having various QoS using limited resources, for example, frequency resources. In particular, with 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 possible to optimize the performance of the communication system, for example, to maximize the spectral efficiency through multiple access, encoding, modulation, information compression, etc. Minimized interference has been proposed, and a frequency sharing scheme has been proposed to increase the efficiency of use of frequency resources by using a frequency band usable in a frequency band already in use, such as a TV band.

Here, frequency sharing in a frequency band usable in a frequency band already in use, such as the aforementioned TV band, is a frequency that can be used without interfering with a primary incumbent having preferential use rights for the TV band. Since the band should be used, it is important to detect the usable frequency band by checking whether the primary license holder uses the frequency band in the TV band. In addition, when there are a plurality of different systems that want to use the available frequency band detected in the TV band, the available frequency may be due to a difference in a communication method, for example, a wireless connection method, between the plurality of different systems. There is a problem in coexistence for using the band.

In other words, in the current communication system, when there are a plurality of different systems that want to use the available frequency band detected by the TV band as described above, the plurality of different systems efficiently uses the detected available frequency band. There is no specific resource management scheme for use, and in particular, there are no schemes for efficiently using frequency resources because different communication systems coexist to use the available frequency band.

Therefore, after detecting a usable frequency band in a frequency band that is already in use, such as a TV band in a communication system, a plurality of different systems, for example, systems of different communication schemes, coexist to efficiently detect the available usable frequency band. A resource management plan is needed to use it.

Accordingly, an object of the present invention is 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 coexist (coexistence) in the frequency band available in the frequency band already in use in the communication system.

Another object of the present invention is 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.

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

A system of the present invention for achieving the above objects is a resource management system in a communication system including a plurality of systems that do not have a right to use a first frequency band, wherein the plurality of systems in the 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 the information of the coexistence manager; And a coexistence discovery and information server (CDIS) for supporting control of the coexistence manager for the plurality of systems; The coexistence manager includes a plurality of coexistence managers corresponding respectively to the plurality of systems; In the plurality of coexistence managers, a first coexistence manager negotiates with coexistence managers adjacent to it based on one of an etiquette mode, a round-robin mode, and a competition mode. Perform a negotiation procedure.

According to an aspect of the present invention, there is provided a method of managing resources of a first frequency band in a communication system including a plurality of systems that do not have a right to use a first frequency band. When a frequency band for which the plurality of systems is available in the frequency band is found, a plurality of coexistence managers (CM) managing the plurality of systems for coexistence and frequency sharing of the plurality of systems in the usable frequency band Transmitting the first negotiation request (Negotiation_Request) message to the 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 repeatedly transmitting and receiving the first and second negotiation request messages so that 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 adjacent coexistence managers.

The present invention manages frequency resources such that a plurality of systems in a communication system use a frequency band that is available in a frequency band already in use, such as a TV band, through coexistence and frequency sharing, thereby efficiently confining a limited frequency resource. Can be used to improve the efficiency of use of frequency resources.

1 is a view schematically showing the structure of a resource management system in a communication system according to an embodiment of the present invention.
2 is a diagram schematically illustrating a negotiation operation of a resource management system in a communication system according to an exemplary embodiment of the present invention.
3, 5, and 6 schematically illustrate a negotiation procedure of a resource management system in a communication system according to an embodiment of the present invention.
4 is a diagram for describing time sharing unit information in a contention mode of a resource management system in a communication system according to an exemplary embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. It should be noted that in the following description, only parts necessary for understanding the operation according to the present invention will be described, and descriptions of other parts will be omitted so as not to distract from the gist of the present invention.

The present invention relates to 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, or an IEEE 802.22 based system. The present invention proposes a resource management system and method for efficiently detecting and using a frequency band usable in, for example, an idle frequency band (WS). Here, in the embodiment of the present invention, a CR system and a system based on IEEE 802.19 and IEEE 802.22 are described as an example, but the resource management scheme proposed by the present invention can be applied to other communication systems.

In addition, an embodiment of the present invention proposes a resource management system and method for allowing a plurality of different systems to coexist in a communication system to efficiently use a frequency band usable in a TV band. 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. Here, in the embodiment of the present invention, a frequency in a frequency band that can be used in a frequency band that is already in use, such as a TV band, is shared, and at this time, to a primary incumbent who has preferential use rights for the TV band. Since the available frequency band should be used without interference, it is necessary to check whether the primary license holder uses the frequency band in the TV band, to detect the available frequency band, and to use the available frequency band detected in the TV band. A plurality of different systems select and use an operating channel in the detected usable frequency band through coexistence and frequency sharing. In other words, according to 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 selects an operation channel in a WS for effective coexistence, wherein the operation is performed in the WS. In order to effectively select a channel, the channels available in the WS are classified and allocated.

Here, the resource management system performs a message transmission and reception procedure for efficient coexistence and frequency sharing between a plurality of systems usable in the TV band, that is, TVWS. In other words, the resource management system transmits and receives a message between each object of the resource management system for effective coexistence and frequency sharing of a plurality of systems using the TVWS, and in particular, registration, coexistence information collection ( Send and receive messages about coexistence information gathering, coexistence decision making, reconfiguration, management, and events to improve coexistence and frequency sharing efficiency of the plurality of systems in the TVWS. Improve.

That is, in the resource management system according to an 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, and the coexistence information collection procedure is also performed. coexistence information gathering procedure and a message in the coexistence information gathering procedure are defined. In the resource management system, a coexistence decision making procedure and a message in the coexistence decision making procedure are defined, a reconfiguration procedure and a message in the reconfiguration procedure are defined, and a management procedure. A measurement procedure and a message in the management procedure, an event procedure and a message in the event procedure are respectively defined. That is, for effective coexistence and frequency sharing in the TVWS of the plurality of systems, each of the objects of the resource management system transmits and receives the defined message as described above, and performs the defined procedures, respectively. Improve coexistence and frequency sharing efficiency of multiple systems. Next, a resource management system in the communication system according to an exemplary embodiment of the present invention will be described in more detail with reference to FIG. 1.

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

Referring to FIG. 1, the resource management system uses a frequency band usable in a frequency band that is already in use, such as a TV band, that is, when a plurality of different systems want to use the TVWS, a frequency in the plurality of different systems. Shared devices that want to use the available frequency band through sharing, such as TV Band Devices (TVBD: TVBD) 1140 and TVBD2 160, the TVBDs ( Coexistence Managers (CMs) that manage the TVBDs 140 and 160 to improve frequency sharing efficiency between the 140 and 160, ie, CM1 120 and CM2 130, A coexistence enabler (CE), which is included in the TVBDs 140 and 160 or independently located and functions as a path between the TVBDs 140 and 160 and the CMs 120 and 130, will be referred to as a “CE”. ) For example, a server supporting the control of the TVBDs 140 and 160 of the CE1 140 and the CE2 170 and the CMs 120 and 130, for example, a Coexistence Discovery and Information Server (CDIS). And a TVWS database (TVWS DB: hereinafter referred to as a TVWS DB) that provides channel information on a band usable in the TV band, that is, TVWS. do. Here, the resource management system includes a plurality of systems, that is, objects for coexistence and frequency sharing in TVWS of TVBDs, and include CE, CM, CDIS, and TVWS DB.

As described above, the TVBDs 140 and 160 may be configured by a primary license holder (hereinafter, referred to as a “primary system”) having a priority to use the TV band. If the frequency band is not used, another user who does not have a preferential use right for the TV band (hereinafter referred to as a 'secondary system') may use a predetermined frequency band in the TV band. It refers to devices of a plurality of different systems, that is, sub-systems to be detected and used as a band. Here, the TVBDs 140 and 160 share and use the predetermined frequency band through coexistence and frequency sharing in order to use limited frequency resources more efficiently. That is, the TVBDs 140 and 160 are allocated a channel in the TVWS to transmit and receive data.

As described above, the CEs 150 and 160 are independently positioned in the TVBDs 140 and 160 to transmit and receive the information of the TVBDs 140 and 160 and the information of the CMs 120 and 130. Here, in the embodiment of the present invention, for convenience of description, the CEs 150 and 160 are described as being independently present in the TVBDs 140 and 160, but the CEs 150 and 160 are the TVBDs 140 and 160. ) Or may be included in the CMs 120 and 130.

In addition, the CEs 150 and 160 may include context information related to corresponding TVBDs 140 and 160 requested by the CMs 120 and 130, for example, a radio access method, transmission power, and spectrum sensing of the TVBDs 140 and 160. Information such as a threshold value and a location is extracted from the TVBDs 140 and 160 and transmitted to the CMs 120 and 130. That is, the CEs 150 and 160 obtain context-related information of different sub-systems and transmit the communication related information of the respective sub-systems 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, a request for context information and configuration of the TVBDs 140 and 160. In response to the request, the context information of the TVBDs 140 and 160 is updated, and the configuration of the TVBDs 140 and 160 is reset, that is, reconfigured. 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 request for the context information of the TVBDs 140 and 160 and according to the event information. The context information of the TVBDs 140 and 160 is updated. In addition, the CEs 150 and 160 receive a component reset of the TVBDs 140 and 160 in response to a request for the configuration of the TVBDs 140 and 160 and configure the TVBDs 140 and 160 according to the component reset. Reset, or reconfigure, an element.

The CMs 120 and 130 determine an operation frequency allocation, a transmission power allocation, and a transmission time allocation to improve frequency sharing efficiency between the TVBDs 140 and 160. In other words, the CMs 120 and 130 may adjust the frequency of the TVBDs 140 and 160 in the usable frequency band in order to improve the frequency sharing efficiency between the TVBDs 140 and 160 for the frequency band available in the aforementioned TV band. Perform operating frequency allocation, transmit power allocation, and transmit time allocation.

The CMs 120 and 130 may transmit and receive information with CMs of TVBDs that do not correspond to them, for example, neighbor CMs, in order to further improve frequency sharing efficiency between the TVBDs 140 and 160. Context information and event information of the TVBDs are transmitted and received to perform operation frequency allocation, transmission power allocation, and transmission time allocation of the corresponding TVBD in the usable frequency band. In this case, the CMs 120 and 130 may acquire and transmit context information and event information of TVBDs that do not correspond to other CMs (for example, adjacent CMs) directly or through other CDs through the CDIS 110. Obtain by sending and receiving. In addition, the CMs 120 and 130 obtain information on spectrum use in the main system, that is, channel information on a channel available in a TV band through an external database such as the TVWS DB 180 or other CMs. Ask them to reset the components of their TVBDs.

As described above, the CDIS 110 supports a control operation of the CMs 120 and 130 for frequency sharing of the TVBDs 140 and 160 with respect to a frequency band usable in the TV band. That is, the CDIS 110 receives and stores context information and event information of the TVBDs 140 and 160 from the CMs 120 and 130, and at the request of the CMs 120 and 130, the CDBDs 140 and 160. Context information and event information are transmitted to the CMs 120 and 130. In addition, the CDIS 110 obtains and stores information on spectrum use in the main system, that is, channel information on a channel available in a TV band, through an external database such as the TVWS DB 180.

The TVWS DB 180 provides channel information, that is, shared channel information, for the channels available in the TVWS to the CMs 120 and 130, and the channel information is registered and identified with the TVWS DB 180. Is only available for TVBDs.

In the communication system according to an exemplary embodiment of the present invention, the resource management system may share a frequency band usable in a frequency band already used by the main system, such as a TV band, that is, coexistence of the TVBDs 140 and 160. And the TVWS DB 180, the CDIS 110, the CMs 120 and 130, and the CEs 140 and 160 for frequency sharing. Here, the TVBDs 140 and 160 are base stations (BSs) hereinafter referred to as BSs as devices of sub-systems for sharing and using the available frequency bands as described above. AP, an access point (hereinafter referred to as "AP"), a service access point (SAP: Service Access Point, referred to as "SAP"), and a terminal. In addition, the sub-systems are a plurality of different systems to share the usable frequency band as described above, and may be systems of different communication methods, for example, an IEEE 802.19 based system and an IEEE 802.22 based system. .

In addition, the resource management system in the communication system according to an embodiment of the present invention, for the coexistence and frequency sharing of the TVBDs (140,160) to the frequency band available in the frequency band that is already in use, in particular as described above the TVWS In order to efficiently coexist and frequency sharing of a plurality of systems, such as the TVBDs (140, 160), by sending and receiving predetermined messages, a plurality of systems in the TVWS effectively improve the frequency usage efficiency through coexistence and frequency sharing.

In this case, the resource management system is operated in a management mode and an autonomous mode (or information mode), and in the management mode resets the setting and configuration of the frequency sharing device, ie, TVBD, indicated by the CM. Reflected in the TVBD, and in the autonomous mode, the CE makes coexistence and frequency sharing decisions on the basis of coexistence and frequency sharing related information provided from the CM, and resets the coexistence and frequency sharing decisions for the setting and configuration of the TVBD. Is reflected in the TBVD. In addition, the resource management system is operated in a centralized topology and a distributed topology, in the centralized topology, a plurality of CMs to any one master CM in a plurality of CMs. A slave CM is connected, where the slave CMs are controlled by the master CM for coexistence and frequency sharing between TVBDs. In the distributed topology, coexistence and frequency sharing between TVBDs are achieved through negotiation between any one CM and neighboring CMs of the one CM in a plurality of CMs.

And, in the communication system according to an embodiment of the present invention, the resource management system, the centralized topology or distributed for the coexistence and frequency sharing of the TVBDs (140,160) for the frequency band available in the frequency band already in use Operating in a topology, where adjacent frequency sharing devices, i.e., certain TVBDs, such as TVBD1 140, CE1 150, and CM1 120, and other adjacent sharing devices, such as TVBD2 160, CE2 170, , And negotiate with the CM2 130. In the resource management system, for coexistence and frequency sharing of the TVBDs 140 and 160, the CM1 120 negotiates with an adjacent CM2 130, and at this time, the TVBD2 registered with the CM2 130. A TVBD that mutually interferes with the TVBD1 140 registered to the CM1 120 (hereinafter, referred to as a 'host CM') to which the 160 wants to perform negotiation, and the CM1 120 that is the host CM. And coexistence and frequency sharing between the TVBDs 140 and 160 through negotiation between the CM2 130 and the adjacent CM.

In addition, the resource management system in the communication system according to an embodiment of the present invention, the frequency sharing device, for example, the TVBDs (for example) to perform an efficient negotiation between the CM1 (120) that is the host CM and the CM2 (130) that is the adjacent CM. When there are more available frequency bands than the frequency bands 140 and 160 intend to use, the host CM CM1 120 based on an etiquette mode using frequencies independent between the TVBDs 140 and 160. And negotiate between the neighboring CM2 130. In addition, the resource management system, when there is less available frequency band than the frequency band to be used by the TVBDs (140,160), Time Division Multiplexing (TDM :) between the TVBDs (140,160) Negotiation between the host CM CM1 120 and the neighbor CM CM2 130 is performed based on the contention mode using the method. Here, the contention mode using the TDM scheme includes a round-robin mode in which all CMs are allocated a resource, eg, a time slot, in proportion to the number of neighboring TVBDs, and all CMs are contentioned. And a competition mode in which each time slot is sequentially allocated according to the content number using a content number. Next, 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.

2 is a diagram schematically illustrating a negotiation operation of a resource management system in a communication system according to an exemplary embodiment of the present invention. 2 is a diagram illustrating a resource management system 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; A schematic diagram of the process.

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

Then, in step 210, in the aforementioned etiquette mode, round-robin mode, and competition mode, the etiquette mode is selected, and then in the etiquette mode. An operating channel list is determined, and negotiation is performed with the neighbor CMs based on the determined operating channel list of the etiquette mode.

In step 215, if the negotiation is successful in the etiquette mode, and if the negotiation fails in the etiquette mode as a result of the check in step 215, in step 220, the aforementioned round In the round-robin mode and the competition mode, after selecting the round-robin mode, the operating channel list, time sharing unit, and time slot position are determined, and the determined round- A negotiation is performed with the neighbor CMs based on the operating channel list, the time sharing unit, and the time slot position in the round-robin mode.

Next, in step 225, it is confirmed whether the negotiation in the round-robin mode is successful, and as a result of the check in step 225, the negotiation may fail in the round-robin mode. In step 230, after selecting the competition mode, an operation channel list, a time sharing unit, and an unused time slot location are determined, and the operation channel list and time sharing unit of the determined competition mode are determined. And negotiate with the neighbor CMs based on the unused time slot position. Then, 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 an embodiment of the present invention with reference to FIGS. It 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 exemplary embodiment of the present invention. 3 is a schematic diagram illustrating a message transmission / reception flow for negotiation in an etiquette mode in which frequency sharing systems, that is, idle frequencies, that is, TVWSs use frequencies that are independent of each other, are larger than TVBDs. Drawing.

Referring to FIG. 3, for coexistence and frequency sharing in TVWS, a host CM 302 hosts a host in the etiquette mode so that the host CM and the neighbor CM negotiate based on the etiquette mode. The channel classification and registration information of the TVBDs registered in the CM 302 and the neighbor CM 304 are updated, that is, the list of available channel lists and the TVBDs is updated to determine the operation channel list ( Step 310).

In addition, the host CM 302 sends a negotiation request (Negotiation_Request, hereinafter referred to as 'Negotiation_Request') message for negotiation with all CMs adjacent to itself in the etiquette mode to the neighbor CM 204. Transmit (step 312).

In addition, the neighbor CM 304, using the Negotiation_Request message received from the host CM 302, the channels of TVBDs registered in the host CM 302 and the neighbor CM 304 in the etiquette mode. The channel classification and registration information is updated, that is, the list of available channels and the list of TVBDs is updated to determine the operating channel list (step 314).

Next, the neighbor 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 neighbor CM 304 and related to negotiation between CMs in the etiquette mode for coexistence and frequency sharing between TVBDs. A message for requesting and providing information about a channel list according to channel classification, for example, an operation channel list, an available 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 neighbor CM 304 when the host CM 302 transmits. When the neighbor CM 304 transmits, the message provides the negotiation related information of the neighbor CM 304 and requests the negotiation related information of the host CM 302. In addition, the Negotiation_Request message includes contents, that is, a header and 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, the payload of the Negotiation_Request message includes negotiation information, and the negotiation information includes mode information indicating whether time scheduling, operating channel list information, time sharing unit information ( time sharing unit information, slot time position information to be used, number of slots information to be used, slotted slot time position information to be not used, and list of contention number) information and the like. Here, the time sharing unit information is defined as a reference time, a window time, and a slot time, wherein the reference time is synchronized with another frequency sharing system, that is, other TVBDs. 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, in particular, the time-sharing unit information in the round-robin mode and the competition mode of the contention mode using the TDM scheme to be described later is as shown in FIG. .

That is, as shown in FIG. 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, the reference time is a different frequency. Used for synchronization with a shared system, i.e., 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 describing time sharing unit information in a contention mode of a resource management system in a communication system according to an exemplary embodiment of the present invention.

In addition, the host CM 302 uses the Negotiation_Request message received from the neighbor CM 304 to channel the TVBDs registered to the host CM 302 and the neighbor CM 304 in the etiquette mode. The classification and registration information is updated to determine an operation channel list (step 318).

As described above, the host CM 302 and the neighbor CM 304 repeatedly transmit and receive the Negotiation_Request message including the negotiation related information, and further, the negotiation related information included in the repeatedly Negotiation_Request message, In particular, the channel classification and registration information of the TVBDs registered in the host CM 302 and the neighbor CM 304 are updated through the channel list information, that is, the available channel list and the list of TVBDs are updated, and the operation channel list is also determined. At this time, the available channel is checked and determined. Here, when the number of transmission / reception of the Negotiation_Request message exceeds a predetermined number of times or when the available channel does not exist, negotiation between the host CM 302 and the neighbor CM 304 in the etiquette mode is performed. It is determined that it has failed, and as described above, the negotiation is performed in a round-robin mode.

In addition, when the available channel exists in the etiquette mode and the negotiation between the host CM 302 and the neighbor CM 304 succeeds, the host CM 302 includes the negotiation state as the negotiation success. The negotiated Negotiation_Request message is received from the adjacent CM 304 to complete negotiation in the etiquette mode (step 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 neighbor CM 304 to update the Negotiation_Request message. In this case, when the number of transmission / reception of the Negotiation_Request message exceeds a preset number, it is determined that the negotiation fails in the etiquette mode. In addition, the host CM 302 requests the neighbor CM 304 to change the operation channel list through the Negotiation_Request message, and if the change of the registration information does not exist, the operation requested by the neighbor CM 304. If a channel list is not selected by the neighboring CM 304, the channel list is selected by selecting a channel available in the channel classification.

In addition, the host CM 302 checks a supportable channel list of the registered TVBDs and checks an available channel in the supportable channel list to select an operation channel list. The host CM 302 checks a network type of the registered TVBDs, checks an available channel that satisfies the network type, and selects an operation channel list. In addition, the host CM 302 checks a required bandwidth of the registered TVBDs, and then selects an operation channel list by checking an available channel satisfying the required band.

The host CM 302 repeatedly performs transmission and reception in the etiquette mode by repeatedly transmitting and receiving the Negotiation_Request message including the information on the operation channel list selected as negotiation related information with the neighbor CM 304. In this case, if the available channel does not exist, it is determined that the negotiation fails in the etiquette mode, and the negotiation is performed in the round-robin mode as described above. Next, the negotiation procedure in the round-robin mode of the resource management system in the communication system according to an embodiment of the present invention will be described in more detail with reference to FIG. 5.

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 exemplary embodiment of the present invention. In addition, FIG. 5 shows a frequency sharing system, i.e., less idle frequency than TVBDs, that is, TVWS, so that the TVBDs use the same frequency, and all CMs allocate resources, such as time slots, in proportion to the number of adjacent TVBDs. FIG. Is a diagram schematically illustrating a message transmission / reception flow for negotiation in an assigned round-robin mode.

Referring to FIG. 5, in order for coexistence and frequency sharing in TVWS, the host CM 502 may perform a host CM 502 so that the host CM and the neighbor CM negotiate based on a round-robin mode. ) And update the channel classification and registration information of the TVBDs registered in the neighbor CM 504, i.e., update the list of available channels and the list of TVBDs and round-off for the registered TVBDs. The parameters of the round-robin mode, for example, the operation channel list, the time sharing unit, and the time slot position of the round-robin mode are determined (step 510).

In operation 512, the host CM 502 transmits a Negotiation_Request message to the neighbor CM 504 for negotiation with all neighboring CMs in the round-robin mode.

In addition, the neighbor CM 504, using the Negotiation_Request message received from the host CM 502, the channel classification (TV classification) of the TVBDs registered in the host CM 502 and the neighbor CM (504) and Update the registration information, i.e. update the list of available channels and TVBDs, the parameters of the round-robin mode for the registered TVBDs, e.g. the round-robin determine a working channel list, a time sharing unit, and a time slot location in step 514;

The neighbor CM 504 then 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).

Here, the Negotiation_Request message is a message used for negotiation between the host CM 502 and the neighbor CM 504. The CM in the round-robin mode for coexistence and frequency sharing between TVBDs. Negotiation related information between the parameters, parameters of the round-robin mode, and a message for requesting and providing a list of operating channels, a time sharing unit, and a time slot location of the round-robin mode. . That is, the Negotiation_Request message is a message for providing negotiation related information of the host CM 502 and requesting negotiation related information of the neighboring CM 304 when the host CM 502 is transmitted. When the neighbor CM 504 transmits, this message provides negotiation related information of the neighbor CM 504 and requests negotiation related information of the host CM 502. In addition, as described above, the Negotiation_Request message includes a content, that is, a header and payload of the Negotiation_Request message, and a data type.

In addition, the host CM 502 may round the round-robin to the host CM 502 in the round-robin mode by using the Negotiation_Request message received from the neighbor CM 504. The parameters of the -robin mode, for example, the operation channel list, the time sharing unit, and the time slot position of the round-robin mode, are determined by updating (step 518).

As described above, the host CM 502 and the neighbor CM 504 repeatedly transmit and receive the Negotiation_Request message including the negotiation related information, and further, the negotiation related information included in the repeatedly Negotiation_Request message, In particular, the operating channel list, time sharing unit, and time slot position of the round-robin mode are updated to determine the parameters of the round-robin mode, wherein the available channels are checked. Decide by Here, when the number of transmission / reception of the Negotiation_Request message exceeds a predetermined number of times, or when the available channel does not exist, the host CM 502 and the neighbor CM 504 in the round-robin mode. It is determined that the negotiation between the) has failed, and as described above, the negotiation is performed in the competition mode.

In the round-robin mode, when the available channel exists and negotiation between the host CM 502 and the neighbor CM 504 succeeds, the host CM 502 negotiates a negotiation state. The negotiated Negotiation_Request message included in the success is received from the neighbor CM 504 to complete the negotiation in the round-robin mode (step 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 neighbor CM 504, and performs the round. Determine the parameters of a round-robin mode, for example, a list of operating channels, a time sharing unit, and a time slot location of the round-robin mode, and transmit and receive the Negotiation_Request message, wherein the Negotiation_Request message If the number of times of transmission and reception exceeds a predetermined number, it is determined that negotiation is failed in the round-robin mode.

In addition, when the neighbor CM 504 requests a parameter change of the round-robin mode, for example, the operation channel list change, through the Negotiation_Request message, the host CM 502 requests the TVBD. The operating channel list is selected using the coexistence information and the available channel list. Here, the host CM 502 accepts the operation channel list change requested by the neighbor CM 504 and selects the requested operation channel list, or does not accept the operation channel list change requested by the neighbor CM 504. The other operating channel list is selected using the coexistence information of the TVBDs and the available channel list.

The host CM 502 selects a time sharing unit by using coexistence information of the TVBDs when requesting a change of the time sharing unit by requesting a parameter change of the round-robin mode. . Here, the host CM 502 accepts the time sharing unit change requested by the neighbor CM 504 to select the requested time sharing unit, or does not accept the time sharing unit change requested by the neighbor CM 504. Another time sharing unit is selected using the coexistence information of the TVBDs. In this case, the host CM 502 selects a reference time for synchronization with other TVBDs, and satisfies QoS performance (latency, duty cycle, etc.) based on the shared information of the TVBD. A window time is selected, and a location of a type slot that satisfies the duty cycle is selected based on the shared information of the TVBD.

The host CM 502 then selects the required number of time slots using the time sharing unit, the list of neighboring TVBDs, and the coexistence information of the registered TVBDs, and then the time sharing unit, the requested The location of the time slot is selected using the number of time slots and coexistence information of the registered TVBDs.

In addition, the host CM 502 may select the parameters of the round-robin mode thus selected, such as an operation channel list, a time sharing unit, and a time slot location of the round-robin mode. The Negotiation_Request message including N as negotiation related information is repeatedly transmitted and received with the neighbor CM 504 to perform negotiation in the round-robin mode. In this case, the available channel exists because the parameters of the round-robin mode, for example, an operation channel list, a time sharing unit, and a time slot position of the round-robin mode cannot be selected. If not, or if the registered TVBDs do not support time scheduling, a negotiation failure in the round-robin mode is determined, and negotiation is performed in a competition mode as described above. Next, the negotiation procedure in the competition mode of the resource management system in the communication system according to an embodiment of the present invention will be described in more detail with reference to FIG. 6.

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. 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 that the frequency sharing system, i.e., there is less idle frequency than TVBDs, namely TVWS, so that the TVBDs use the same frequency, and all the CMs sequentially use the contention number using the contention number. FIG. Is a diagram schematically illustrating a message transmission and reception flow for negotiation in a competition mode in which each time slot is allocated.

Referring to FIG. 6, for coexistence and frequency sharing in the TVWS, the host CM 602 is configured to perform negotiations between the host CM and the neighbor CM based on a competition mode. Update the channel classification and registration information of the TVBDs registered at 604, i.e., update the list of available channels and TVBDs, and enter a competition mode for the registered TVBDs. Parameters are determined, for example, an operating channel list, a time sharing unit, and an unused time slot location in the competition mode (step 610).

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

In addition, the neighbor CM 604, using the Negotiation_Request message received from the host CM (602), the channel classification (TV classification) of the TVBDs registered in the host CM (302) and neighbor CM 304 and Update registration information, i.e., update the list of available channels and the list of TVBDs, and for the registered TVBDs the parameters of the competition mode, for example the operating channel list of the competition mode. In operation 614, the time sharing unit and the unused time slot location are determined.

Next, 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 (step 616).

Here, the Negotiation_Request message is a message used for negotiation between the host CM 602 and the neighbor CM 604, and related to negotiation between CMs in the competition mode for coexistence and frequency sharing between TVBDs. A message requesting and providing information, parameters of the competition mode, an operation channel list of the competition mode, a time sharing unit, and an unused time slot location. That is, the Negotiation_Request message is a message for providing negotiation related information of the host CM 602 when the host CM 602 transmits, and requesting negotiation related information of the neighbor CM 604. When the neighbor CM 604 transmits, this message provides negotiation related information of the neighbor CM 604 and requests negotiation related information of the host CM 602. In addition, as described above, the Negotiation_Request message includes a content, that is, a header and payload of the Negotiation_Request message, and a data type.

In addition, the host CM 602 uses the Negotiation_Request message received from the neighbor CM 604 to operate the host channel list in the competition mode for the host CM 602 in the competition mode. In operation 618, the time sharing unit and the unused time slot location are updated.

As described above, the host CM 602 and the neighbor CM 604 repeatedly transmit and receive the Negotiation_Request message including the negotiation related information, and further, the negotiation related information included in the repeatedly Negotiation_Request message, In particular, the operating channel list, the time sharing unit, and the unused time slot position of the competition mode are updated to determine parameters of the competition mode, and the available channels are checked and determined. Here, when the number of transmission / reception of the Negotiation_Request message exceeds a preset number, or when the available channel does not exist, negotiation between the host CM 602 and the neighbor CM 604 in the competition mode is performed. Determined to fail, search for new TVWS.

When the available channel exists in the competition mode and the negotiation between the host CM 602 and the neighbor CM 604 succeeds, the host CM 602 includes the negotiation state as the negotiation success. The set Negotiation_Request message is received from the neighbor CM 604 (step 620).

The host CM 602 then uses the Negotiation_Request message to determine the parameters of the competition mode according to the negotiation success, such as a list of operating channels, time sharing units, and usage of the competition mode. The non-time slot position is determined, and notification parameters according to the negotiation success, for example, a list of successful negotiation CM lists, a time sharing unit, and a time slot position list are determined (step 622).

In addition, the host CM 602 informs all neighboring CMs of the negotiation success result. That is, the host CM 602 negotiates a notification parameter according to the negotiation success, for example, a list of successful CM negotiations, a time sharing unit, and a time slot location list, to notify neighboring CMs of the negotiation result. A notification message (Negotiation_Announcement, hereinafter referred to as 'Negotiation_Announcement') is transmitted to the adjacent CM 604 (step 624).

Here, the Negotiation_Announcement message is a message for notifying the negotiation result to all CMs adjacent to the host CM 602 after the negotiation is completed. The Negotiation_Announcement message includes negotiation result information between the host CM 602 and the neighbor CMs. It's a message for them. The Negotiation_Announcement message includes a content, that is, a header and payload of the Negotiation_Announcement message, and a data type.

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 neighbor CM 604, and the contention is performed. (competition) mode parameters, for example, the operation channel list of the competition mode (competition) mode, a time sharing unit, and the unused time slot position is determined to transmit and receive the Negotiation_Request message, wherein the number of transmission and reception of the Negotiation_Request message If the set number of times is exceeded, it is determined that the negotiation fails in the competition mode.

In addition, when the neighbor CM 604 requests a parameter change of the competition mode, for example, a change of the operation channel list, through the Negotiation_Request message, the host CM 602 coexists with the TVBD. Select the operating channel list using the available channel list. Here, the host CM 602 accepts the operation channel list change requested by the neighbor CM 604 and selects the requested operation channel list, or does not accept the operation channel list change requested by the neighbor CM 604. The other operating channel list is selected using the coexistence information of the TVBDs and the available channel list.

The host CM 602 selects a time sharing unit by using coexistence information of the TVBDs when requesting a change of the time sharing unit by requesting a parameter change of the competition mode. Here, the host CM 602 accepts the time sharing unit change requested by the neighbor CM 604 to select the requested time sharing unit or does not accept the time sharing unit change requested by the neighbor CM 604. Another time sharing unit is selected using the coexistence information of the TVBDs. At this time, the host CM 602 selects a reference time for synchronization with other TVBDs, and satisfies QoS performance (latency and duty cycle, etc.) based on the shared information of the TVBD. A window time is selected, and a location of a type slot that satisfies the duty cycle is selected based on the shared information of the TVBD.

The host CM 602 then checks the unused time slot position using the time sharing unit, the list of neighboring TVBDs, and coexistence information of the registered TVBDs. The host CM 602 generates a content number list using a random number generator.

That is, the host CM 602 checks the location of the unused time slot and the content number in all neighboring TVBDs, and then checks the time sharing unit determined by negotiation between the neighboring CMs 604, Select a list of CMs that have successfully negotiated the negotiation, and sequentially select according to the content number, for example, select a list of CMs that have successfully negotiated according to the order of the CMs having the greatest number of contentions, The time slot position list is selected using a sharing unit. Therefore, the host CM 602 completes negotiation in the competition mode manner, and the host CM 602 notifies neighboring CMs of the negotiation result, that is, notification parameters according to the negotiation success, For example, a Negotiation_Announcement message including a list of successful CMs, a time sharing unit, and a list of time slot positions is transmitted to the neighbor CM 604.

As such, in a communication system according to an embodiment of the present invention, the resource management system includes an etiquette mode and a round-robin mode between one CM and other adjacent CMs for coexistence and frequency sharing in the TVWS. And transmitting and receiving the Negotiation_Request message until the negotiation is completed, and transmitting and receiving the Negotiation_Announcement message until negotiation is completed, so as to perform negotiation based on a competition mode and a competition mode. It supports coexistence and frequency sharing between multiple systems, namely 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 to the described embodiments, but should be determined not only by the scope of the following claims, but also by the equivalents of the claims.

Claims (20)

A resource management system in a communication system including a plurality of systems that do not have a right to use a first frequency band,
A coexistence manager (CM) that manages the plurality of systems for coexistence and frequency sharing of the plurality of systems in the usable frequency band when the frequency band available for the plurality of systems is found in the first frequency band. );
A coexistence enabler (CE) for transmitting and receiving the information of the plurality of systems and the information of the coexistence manager; And
A coexistence discovery and information server (CDIS) supporting control of the coexistence manager for the plurality of systems;
The coexistence manager includes a plurality of coexistence managers corresponding respectively to the plurality of systems;
In the plurality of coexistence managers, a first coexistence manager negotiates with coexistence managers adjacent to it based on one of an etiquette mode, a round-robin mode, and a competition mode. A resource management system characterized by performing a negotiation procedure.
The method of claim 1,
The first coexistence manager, if the available frequency band is larger than the frequency band to be used by the plurality of systems, selects the etiquette mode, and then updates channel classification information and the information of the plurality of systems in the etiquette mode. And determining the operating channel list in the etiquette mode and performing the negotiation procedure with the adjacent coexistence managers.
The method of claim 2,
The first coexistence manager, in the channel classification information, checks an available channel list, a supportable channel list, a network type, and a required band of the plurality of systems, and determines the operation channel list. Management device.
The method of claim 3,
The first coexistence manager sends a first negotiation request message including negotiation related information according to the operating channel list to the adjacent coexistence managers; And in response to the first negotiation request message, a second negotiation request message including negotiation related information according to an operation channel list determined by the adjacent coexistence managers, from the adjacent coexistence managers.
The method of claim 4, wherein
Wherein the first coexistence manager uses the second negotiation message and the adjacent coexistence managers use the first negotiation message to update channel classification information and information of the plurality of systems in the etiquette mode. Resource management system.
The method of claim 1,
The first coexistence managers, after selecting the round-robin mode when the available frequency band is smaller than the frequency band to be used by the plurality of systems, selects the channel classification information and the plurality of systems in the round-robin mode. And update the information to determine the operation channel list, the time sharing unit, and the time slot position in the round-robin mode, and then perform the negotiation procedure with the adjacent coexistence managers.
The method of claim 6,
The first coexistence manager, in the channel classification information, checks an available channel list and determines the operating channel list using the available channel list and the information of the plurality of systems. .
The method of claim 7, wherein
The first coexistence manager determines a time sharing unit by using the information of the plurality of systems, checks the list of the plurality of systems in the information of the plurality of systems, and then includes the time sharing unit and the plurality of systems. And use the list and information of the systems to determine the number of time slots required.
The method of claim 8,
The first coexistence manager determines the time slot location by determining the location of the required time slot through the time sharing unit, the required number of time slots, and the information of the plurality of systems. Management system.
10. The method of claim 9,
The first coexistence manager sends a first negotiation request message to the adjacent coexistence managers, the first negotiation request message comprising negotiation related information according to the operation channel list, a time sharing unit, and a time slot location; In response to the first negotiation request message, receive a second negotiation request message from the neighboring coexistence managers, the second negotiation request message including negotiation channel-related information according to the operation channel list determined in the adjacent coexistence managers, a time sharing unit, and a time slot location; Resource management apparatus, characterized in that.
The method of claim 10,
The first coexistence manager uses the second negotiation message and the adjacent coexistence managers use the first negotiation message to update the channel classification information and the information of the plurality of systems in the round-robin mode. Resource management system characterized by.
The method of claim 6,
In the round-robin mode, the plurality of systems use the same frequency, and the plurality of coexistence managers are allocated a time slot in proportion to the number of a plurality of adjacent systems. The method of claim 1,
The first coexistence managers, when the available frequency band is smaller than the frequency band to be used by the plurality of systems, selects the contention mode, and then updates channel classification information and information of the plurality of systems in the contention mode. And determining the operating channel list, the time sharing unit, and the unused time slot position in the contention mode, and performing the negotiation procedure with the adjacent coexistence managers.
The method of claim 13,
The first coexistence manager, in the channel classification information, checks the available channel list, and determines the operation channel list using the available channel list and the information of the plurality of systems.
The method of claim 14,
The first coexistence manager determines a time sharing unit by using the information of the plurality of systems, checks the list of the plurality of systems in the information of the plurality of systems, and then includes the time sharing unit and the plurality of systems. Using the list of systems and the information, checking the location and contention number list of the unused time slot, and determining the location of the coexisting manager list and the slot time for which the negotiation procedure is successful. Resource Management System.
16. The method of claim 15,
The first coexistence manager transmits a first negotiation request message to the adjacent coexistence managers, the first negotiation request message including negotiation operation information according to the operation channel list, a time sharing unit, and an unused time slot location; In response to the first negotiation request message, the adjacent coexistence manager includes a second negotiation request message that includes negotiation related information according to an operation channel list determined in the adjacent coexistence managers, a time sharing unit, and an unused time slot location; Resource management apparatus characterized in that received from the.
The method of claim 16,
Wherein the first coexistence manager uses the second negotiation message and the adjacent coexistence managers use the first negotiation message to update channel classification information and information of the plurality of systems in the contention mode. Resource management system. 16. The method of claim 15,
The first coexistence manager, the resource management system, characterized in that for transmitting to the adjacent coexistence managers a negotiation notification message containing the negotiation result information according to the location of the coexisting manager list and the slot time of the successful negotiation process.
The method of claim 13,
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 the content number (contention number).
A method of managing resources of a first frequency band in a communication system including a plurality of systems that do not have a right to use a first frequency band,
When a frequency band for which the plurality of systems is available in the first frequency band is found, a plurality of coexistence managers for managing the plurality of systems for coexistence and frequency sharing of the plurality of systems in the usable frequency band (CM) In the Coexistence Managers, the first coexistence manager sends a first negotiation request (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
By repeatedly transmitting and receiving the first and second negotiation request messages, 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 adjacent coexistence managers.

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