KR101869098B1 - 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 having no usage right for a first frequency band, In a communication system including a plurality of systems having no available frequency band, the method comprising: when a frequency band in which the plurality of systems are usable in the first frequency band is detected, Obtaining channel information of the usable frequency band from a TVWS database (TVWS DB) providing channel information of the available frequency band; Obtaining channel information of a neighbor coexistence manager from a plurality of coexistence managers for coexistence and frequency sharing of the plurality of systems in the usable frequency band; And allocating an operation channel of the plurality of systems by dividing the usable frequency band based on the channel information of the usable frequency band and the channel information of the neighbor coexistence manager.

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.

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; The first coexistence manager of the plurality of coexistence managers divides the usable frequency band based on the channel information of the usable frequency band and the channel information of the neighbor coexistence manager, .

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, And acquires channel information of the usable frequency band from a TVWS database (TVWS DB) that provides channel information of the usable frequency band when a frequency band in which the plurality of systems can use the frequency band is found step; Obtaining channel information of a neighbor coexistence manager from a plurality of coexistence managers for coexistence and frequency sharing of the plurality of systems in the usable frequency band; And assigning operation channels of the plurality of systems by classifying the available frequency bands based on channel information of the usable frequency band and channel information of the neighbor coexistence manager.

In the present invention, a plurality of systems coexist in a communication system to manage a frequency resource so as to use a usable frequency band in a frequency band already in use, such as a TV band, so as to efficiently use a limited frequency resource, 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 diagram schematically illustrating a channel classification operation of a resource management system in a communication system according to an embodiment of the present invention.
3 is a diagram schematically illustrating a channel identification operation of a resource management system in a communication system according to an embodiment of the present invention.
4 is a diagram schematically illustrating a channel allocation operation of a resource management system in a communication system according to an embodiment of the present invention.
5 is a diagram schematically illustrating a channel selection operation 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 mutual coexistence, To effectively select an operation channel, the WS classifies available channels and allocates channels. 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.

Referring to FIG. 1, when a plurality of systems having different usable frequency bands in a frequency band that is already in use, such as a TV band, are used by the plurality of systems, A frequency band between the TVBDs 140 and 160 and a TV band device (TVBD) 1 140 and a TVBD 2 160 that are intended to use the usable frequency band, A CM1 120 and a CM2 130 for managing the TVBDs 140 and 160 to improve sharing efficiency such as CMs 130 and 160 and the TVBDs 140 and 160 A coexistence enabler (CE), which is included in or independent from the TVBs 140 and 160 and serves as a channel between the TVBDs 140 and 160 and the CMs 120 and 130, CE1 ( 140 and CE2 170 and a server supporting the control of the TVBDs 140 and 160 of the CMs 120 and 130 such as 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.

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 for a channel available in the TVWS to the CMs 120 and 130. The channel information is provided only to TVBDs whose registration and identification numbers are authenticated in the TVWS DB 180 do.

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 .

In addition, in the communication system according to the embodiment of the present invention, the resource management system may include a channel available in the TV band (for example, a channel available for use in the TV band) for the coexistence and frequency sharing of the TVBDs 140 and 160 available channels) and then allocates them for use by the TVBDs 140 and 160 to select an operation channel in the TVWS. That is, for a mutual coexistence of resource management systems for coexistence and frequency sharing among a plurality of different systems, predetermined objects such as CMs 120 and 130 select an operation channel in the TVWS, And classifies channels available in the TVWS to allocate channels.

Here, the frequency management system is a system in which, when mutually coexisting a plurality of systems, the number of systems that wish to coexist through frequency sharing is larger than the number of channels available in the corresponding system, For example, when selecting an operation channel of TVBDs, an individual TV channel allocation method, a TV channel sharing by TVBDs of the same type (same / similar type) Or a shared TV channel allocation by TVBD of dissimilar type.

The individual TV channel allocation scheme is a scheme for adaptively allocating different channels to TVBDs to TVBDs adaptively so that there is no spectrum overlap between TVBDs, Do not cause interference with each other, and support mutual coexistence of TVBEs by allocating appropriate TV channels to TVBDs. The TV channel sharing method between the same type TVBDs is a method in which two or more same-kind TVBDs, that is, TVBDs using the same wireless access method share the same TV channel, You can assign them to share. Herein, when a TV channel is shared between the same type TVBDs, the interference caused between the same TVBDs is reduced by using a self-coexistence algorithm. For example, two or more IEEE 802.22 systems with the same type of TVBDs, i. E., A homogeneous system, may use a homogeneous coexistence algorithm such as an On-Demand Fame Contention (ODFC) Channel sharing between IEEE 802.11 systems. Also, the TV channel sharing method between the different types of TVBDs may be implemented by using two or more different types of TVBDs, i.e., TVBEs using different wireless access methods, sharing the same TV channel, Minimize the interference that occurs.

The frequency management system selects an operation channel to be used by the CM for mutual coexistence and frequency sharing of a plurality of systems, that is, classifies a usable channel in the TVWS as described above, And allocates an operation channel to the plurality of systems in the classified channel by classifying the idle channel, that is, the usable channel, in the TV band using the registered TVBD information. Hereinafter, the classification of available channels in the TV band of the CM of the resource management system in the communication system according to the embodiment of the present invention will be described in more detail.

2 is a diagram schematically illustrating a channel classification operation of a resource management system in a communication system according to an embodiment of the present invention. Herein, since the channel allocation is determined according to the type of TVBDs and the use of channels in adjacent CMs in the TVWS, the resource management system determines channel allocation as shown in FIG. 2 for effective mutual coexistence and frequency sharing among a plurality of systems Perform channel classification in TVWS.

Referring to FIG. 2, in step 210, the CM of the resource management system initializes a channel classification flag for channel classification in the TVWS. That is, the CM resets the channel classification flag, and resets the initialization channel classification flag (Initiate_Channel_Classification) to '0'.

Then, in step 220, the CM discovers or identifies the CEs registered in the CM, and sets the Initiate_Registered_CE_Discovery flag to '1' to distinguish the registered CEs do.

Next, in step 230, it is checked whether the TVWS DB providing channel information on a channel available in the TVWS is updated to the latest channel information. If it is determined in step 230 that the TVWS DB has been updated, The CM itself and adjacent CMs, i.e., adjacent CMs. If the TVWS DB is updated, the CM acquires channel information of a channel available in the updated TVWS from the TVWS DB. If the TVWS DB is updated, the TVWS Channel Update (TVWS_Channel_Update) flag Is set to " 1 ". If the TVWS_Channel_Update flag is set to '1', the CM resets the TVWS_Channel_Update flag to '0', and then in step 250, the CM detects an Initiate_Neighbor_CM_Discovery flag To distinguish, i.e., identify, adjacent CMs.

On the other hand, if it is determined in step 230 that the TVWS DB has not been updated, the TVWS DB is accessed in step 240 and channel information of a channel available in the TVWS is acquired from the TVWS DB. If the TVWS DB is not updated, the TVWS_Channel_Update flag is set to '0'. When the TVWS_Channel_Update flag is set to '0', the CM accesses the TVWS DB to acquire channel information. If the channel information can not be acquired for a predetermined period of time, To cause the CEs to send a disconnection request message to the CM itself.

In step 240, the CM acquiring channel information of a channel available in the TVWS DB from the TVWS DB sets an initial neighbor CM distinguish (Initiate_Neighbor_CM_Discovery) flag in step 250 as described above, thereby identifying or identifying adjacent CMs.

Then, in step 260, the CM identifies / identifies a channel available in the TVWS from the channel information, performs channel identification, sets an initial channel allocation (Initiate_Channel_Allocation) flag in step 270, The available channels are allocated to a plurality of systems, i.e., TVBEs.

In order to classify the available channels in the TVWS, the CM of the resource management system in the communication system according to the embodiment of the present invention distinguishes the CEs registered in itself as in step 220, After acquiring channel information for a usable channel in the TVWS, neighboring CMs are distinguished in step 250, and channels are classified and identified in step 260. [ In other words, in order to classify channels available in the TVWS, the CM of the resource management system must receive the channel information of channels available in the TVWS from the TVWS DB as described above. At this time, Since the channel information is provided only to the TVBDs whose identification numbers have been authenticated, the CM requests the CE related information and measurement information including the identification number to the CE registered in the CM.

First, the TVWS DB transmits the channel information of a channel usable in the TVWS to the CM as described above, and the channel information can be expressed as shown in Table 1 and Table 2. [ Table 1 shows a header and payload of a message including channel information of available channels in the TVWS, that is, usable TVWS channel information. Table 2 shows the available TVWS channels This is a table showing the data type of a message including information.

Header Information element Data type Description sourceIdentifier = CE_ID or TVWSDB_ID CX_ID Source identifier destinationIdentifier = CM_ID CX_ID Destination identifier ACKPolicy BOOLEAN Request to send an acknowledgment of reception Payload Information element Data type Description listOfAllowedTVWSChNumber ListOfAllowedTVWSChNumber
OPTIONAL Allowed TVWS channel number list constOfChUses ConstOfChUses
OPTIONAL Channel user constraint

ConstOfChUseID :: = ENUMERATED {
regulationMaxTxPower,
regulationMaxAntGain,
regulationMaxAntHeight,
regulationTVDBUpdateTime,
OutOfBandEmissionLimit,
...
}
ConstOfChUseValue :: = CHOICE {
regulationMaxTxPower REAL,
regulationMaxAntMaxGain REAL,
regulationAntMaxHeight REAL,
regulationTVDBUpdateTime REAL,
OutOfBandEmissionLimit REAL,
...
}

ConstOfChUse:: = SEQUENCE {
constOfChUseID ConstOfChUseID,
constOfChUseValue ConstOfChUseValue
}

ConstOfChUses :: = SEQUENCE OF ConstOfChUse

As described above, the CM requests measurement information to the CEs to distinguish the CEs registered to the CM, and the CMs transmit the measurement information in response to the measurement information request. Here, the measurement information includes information on a radio access scheme, transmission power, spectrum sensing threshold, and location of TVBDs, i.e., context information related to the TVBDs. Table 3 is a table showing the header and payload of the request message requesting the measurement information, Table 4 is a table showing the data type of the request message, Table 5 shows the response message including the measurement information, Header and payload, and Table 6 is a table showing the data type of the response message.

Header Information element Data type Description sourceIdentifier = CM_ID CX_ID Source identifier destinationIdentifier = CE_ID CX_ID Destination identifier ACKPolicy BOOLEAN Request to send an acknowledgment of reception Payload Information element Data type Description measurementDescription MeasurementDescription Measurement description
MeasSchedule :: = SEQUENCE {
measStartTime REAL,
numberOfMeasurements INTEGER,
timeBetweenMeasurements REAL
}
MeasFreq :: = SEQUENCE {
measStartFreq REAL OPTIONAL,
measEndFreq REAL OPTIONAL,
listOfChNumber SEQUENCE OF INTEGER OPTIONAL
}
MeasurementDescription :: = SEQUENCE OF SEQUENCE {
measDescr ENUMERATED {SINR, BER, SensingLevel, PrimaryDetection, TVBDDetection,
ChannelLoadMeasurement ... },
measSchedule MeasSchedule,
measFreq MeasFreq
}

delete

Header Information element Data type Description sourceIdentifier = CE_ID CX_ID Source identifier destinationIdentifier = CM_ID CX_ID Destination identifier ACKPolicy BOOLEAN Request to send an acknowledgment of reception Payload Information element Data type Description measurementResult MeasurementResult Measurement results

MeasurementResult :: = SEQUENCE OF SEQUENCE {
reqInfoDescr ReqInfoDescr,
reqInfoValue CHOICE {SINRValue REAL, BERValue REAL, SensingLevelValue REAL, PrimaryDetection BOOLEAN, TVBDDetection BOOLEAN, ChannelLoadMeasurement REAL, otherValue ANY}
}

Next, in order for the CM of the resource management system to classify the channels available in the TVWS, it is necessary to distinguish adjacent CMs so that a plurality of systems can mutually coexist and frequency-share effectively without performance deterioration. Information about channels in TVWS used by all TVBDs registered in CMs is needed. Therefore, the CM requests the neighboring CM list and the TVBD information registered in the adjacent CMs to the CDIS, and based on the neighboring CM list and the TVBD information registered in the adjacent CMs, the TVBD information registered in the adjacent CM To the adjacent CM. The CM transmits the neighboring CM list received from the CDIS and the TVBD information registered in the adjacent CMs to the CEs. At this time, the CM distinguishes adjacent CMs from the neighboring CM list received from the CDIS and the TVBD information registered in the adjacent CMs.

Table 7 shows the header and payload of the request message for requesting the neighbor CM list and the TVBD information registered in the adjacent CMs by the CDIS, And a header and a payload of a response message including the neighboring CM list to be transmitted and the TVBD information registered in the neighboring CMs.

Header Information element Data type Description sourceIdentifier = CM_ID CX_ID Source identifier destinationIdentifier = CDIS_ID CX_ID Destination identifier ACKPolicy BOOLEAN Request to send an acknowledgment of reception Payload Information element Data type Description listOfCEID SEQUENCE OF CX_ID OPTIONAL CE ID list
Header Information element Data type Description sourceIdentifier = CDIS_ID CX_ID Source identifier destinationIdentifier = CM_ID CX_ID Destination identifier ACKPolicy BOOLEAN Request to send an acknowledgment of reception Payload Information element Data type Description Note: Information elements below are repeated for each TVBD network or device. CEID CX_ID CE ID Note: Information elements below are repeated for each neighbor CM neighborCMID CX_ID Neighbor CM ID Note: Information elements below are repeated for each neighbor TVBD network or device. networkID NetworkID E.g., BSSID networkTechnology NetworkTechnology E.g., 802.11af, 802.22 interferenceDirection InterferenceDirection Mutual, source or victim interferenceLevelFromNeighbor REAL Estimated worst case interference level caused by the neighbor interferenceLevelToNeighbor REAL Estimated worst case interference level caused by TVBD network or device for which neighbors are reported NetworkGeometryClass NetworkGeometryClass Network geometry class between a TVBD network and its neighbor TVBD network (s)

delete

Table 9 is a table showing a header and a payload of a request message for requesting TVBD information registered in the adjacent CM to a neighboring CM by the CM. Table 10 shows a request for requesting TVBD information registered in the neighboring CM, This is a table showing the data type of the message.

Header Information element Data type Description sourceIdentifier = CM_ID CX_ID Source identifier destinationIdentifier = CE_ID or CM_ID CX_ID Destination identifier ACKPolicy BOOLEAN Request to send an acknowledgment of reception Payload Information element Data type Description reqInfoDescr ReqInfoDescr ID of the requested information

ReqInfoDescr :: = SEQUENCE OF ENUMERATED {
SINR,
desiredBandwidth,
desiredOccupancy,
desiredQoS,
desiredCoverage,
channelNumber,
...
}

Table 11 is a table showing the header and payload of the response message including the TVBD information registered in the adjacent CM transmitted by the adjacent CM in the adjacent CM. Table 12 shows the header and payload of the response message including the TVBD information And the data type of the response message.

Header Information element Data type Description sourceIdentifier = CE_ID or CM_ID CX_ID Source identifier destinationIdentifier = CM_ID CX_ID Destination identifier ACKPolicy BOOLEAN Request to send an acknowledgment of reception Payload Information element Data type Description reqInfoValue ReqInfoValue Requested information
ReqInfoValue :: = SEQUENCE OF SEQUENCE {
reqInfoDescr ReqInfoDescr,
reqInfoValue CHOICE {SINRValue REAL,
desiredBandwidthValue REAL,
desiredOccupancyValue REAL,
desiredQoSValue REAL,
desiredCoverageValue REAL,
channelNumberValue REAL,
otherValue ANY}
}

delete

In addition, the CM receives a request from the CE for the neighboring CM list received from the CDIS and the TVBD information registered in the adjacent CM. As described above in response to the request of the CE, The CM list and the TVBD information registered in the adjacent CM are transmitted to the CE. Table 13 is a table showing the header and payload of a request message for requesting the CM from the CM list and the TVBD information registered in the adjacent CM by the CM, And a header and a payload of a response message including the neighboring CM list to be transmitted and the TVBD information registered in the neighboring CM.

Header Information element Data type Description sourceIdentifier = CE_ID CX_ID Source identifier destinationIdentifier = CM_ID CX_ID Destination identifier ACKPolicy BOOLEAN Request to send an acknowledgment of reception Payload Information element Data type Description None
Header Information element Data type Description sourceIdentifier = CM_ID CX_ID Source identifier destinationIdentifier = CE_ID CX_ID Destination identifier ACKPolicy BOOLEAN Request to send an acknowledgment of reception Payload Information element Data type Description Note: Information elements below are repeated for each neighbor CM neighborCMID CX_ID Neighbor CM ID Note: Information elements below are repeated for each neighbor TVBD network or device. networkID NetworkID E.g., BSSID networkTechnology NetworkTechnology E.g., 802.11af, 802.22 interferenceDirection InterferenceDirection Mutual, source or victim interferenceLevelFromNeighbor REAL Estimated worst case interference level caused by the neighbor interferenceLevelToNeighbor REAL Estimated worst case interference level caused by TVBD network or device for which neighbors are reported listOfOperatingChannelNumber ListOfOperatingChannelNumber
OPTIONAL List of operating channel number listOfOperatingFrequencies ListOfOperatingFrequencies
OPTIONAL List of operating frequencies radioEnvironmentInformation RadioEnvironmentInformation
OPTIONAL Radio environment information NetworkGeometryClass NetworkGeometryClass Network geometry class between a TVBD network and its neighbor TVBD network (s)

delete

The CM which distinguishes the adjacent CMs distinguishes the available channels in the TVWS. Since the channels available in the TVWS are different according to the type of the TVBD and whether the channels are used in the adjacent CMs, Based on the channel information of the channel available in the TVWS acquired from the TVWS DB and the channel information used by all adjacent TVBDs registered in the adjacent CMs, the operating channel is classified in the TVWS, that is, the available channels are classified. Hereinafter, referring to FIG. 3, the resource management system in the communication system according to the embodiment of the present invention confirms the available channels in the TVWS, that is, the operation channel classification in the TVWS will be described in more detail.

3 is a diagram schematically illustrating a channel identification operation of a resource management system in a communication system according to an embodiment of the present invention.

Referring to FIG. 3, in step 310, the CM of the resource management system stores channel information of channels available in the TVWS acquired from the TVWS DB and channel information of channels available to all adjacent TVBDs registered in adjacent CMs Based on the channel information, the available channels in the TVWS are checked.

Then, in step 320, the CM checks whether the channel available in the checked TVWS is an active channel used by the TVBD registered in the adjacent CM.

Next, in step 330, the CM uses a channel available in the checked TVWS as an operation channel used by the TVBD registered in the adjacent CM and an operation channel not used by the TVBD registered in the adjacent CM It is divided into possible channels. In addition, the CM transmits a restricted channel in the checked TVWS to an operation channel used by the TVBD registered in the adjacent CM and an operation channel not used by the TVBD registered in the adjacent CM, It is classified. That is, the CM classifies a channel in which TVBDs registered to the CM in the TVWS are available. Hereinafter, with reference to FIG. 4, a resource management system allocates a channel available in the TVWS in the communication system according to an embodiment of the present invention, that is, an operation channel allocation in the TVWS will be described in more detail.

4 is a diagram schematically illustrating a channel allocation operation of a resource management system in a communication system according to an embodiment of the present invention.

Referring to FIG. 4, in step 410, the CM of the resource management system transmits an updated channel of the TVWS DB, which provides channel information on available channels in the TVWS, It is checked whether information data is valid. If the updated channel information data of the TVWS DB is not valid, the CM accesses the TVWS DB to update the channel information of the TVWS DB, as described in FIG. 2, The update has been described in detail with reference to FIG. 2, and a detailed description thereof will be omitted here.

In step 420, the CM checks the channel classification of available channels in the TVWS as described with reference to FIG. At this time, the CM resets the initial channel allocation (Initiate_Channel_Allocation) flag to '0' to check channel classification of available channels in TVWS.

Then, in step 430, the CM allocates a channel usable in the channel-classified TVWS to the CEs registered in the CM itself. Here, as described above, the CM allocates an independent operation channel to each CE when the individual TV channel allocation scheme is used. If the negotiation with the adjacent CM is required, the CM performs negotiation with the adjacent CM to update the channel classification of the available channels in the TVWS, The mobile station determines the channel-specific scheme of CEs registered in the CM itself and selects an operation channel, that is, allocates a channel. Here, the channel available in the TVWS is different according to the type of the TVBD and whether the channel is used in the adjacent CM, so that the CM can use the channel information of the channel available in the TVWS received from the TVWS DB, And selects and allocates an operation channel of the registered CEs based on operation channel information of all adjacent TVBDs registered in the CMs.

Next, in step 440, the CM requests reconfiguration to the CEs registered to the CM itself, and confirms whether the re-registration of the registered CEs has been successfully performed according to the reset request. Here, the channel is not allocated to the CE that fails to perform the resetting successfully.

In step 450, the CM updates the channel classification according to the channel assignment to the registered CEs as described above, and transmits the channel classification information for the updated channel classification to the adjacent CMs. At this time, the CM updates the channel classification by setting an initial registered CM channel classification classification (Initiate_Registered_CM_Channel_Classificaiton_Discovery) flag to '1', and transmits the updated channel classification information to the adjacent CM.

Here, the CM confirms whether or not the reset has been successfully performed to the CEs registered in the CM according to the reset request, and the registered CEs can notify the reset related information in response to the reset request To the CM. That is, the CM receives a reset response message including the reset related information from the registered CEs in response to the reset request, and transmits a reset response message including the reset related information included in the reset response message Confirm that this has been done successfully. Table 15 is a table showing the header and payload of the reset response message including the reset related information, and Table 16 is a table showing the data type of the reset response message.

Header Information element Data type Description sourceIdentifier = CE_ID CX_ID Source identifier destinationIdentifier = CM_ID CX_ID Destination identifier ACKPolicy BOOLEAN Request to send an acknowledgment of reception Payload Information element Data type Description status BOOLEAN Status: successful or not failedParameters FailedParameters OPTIONAL Failed reconfiguration parameters with recommended values of parameters if reconfiguration request from CM to TVBD is failed
FailedParameterID:: = ENUMERATED {
operatingFrequency,
listOfoperatingChNumber,
txPowerLimit,
channelIsShared,
txSchedule,
}

FailedParameterValue:: = CHOICE {
operatingFrequency SEQUENCE {startFeq REAL, stopFreq REAL}
listOfoperatingChNumber SEQUENCE OF INTEGER,
txPowerLimit REAL,
channelIsShared BOOLEAN,
txSchedule SEQUENCE OF TxSchedule OPTIONAL
}

FailedParameter:: = SEQUENCE {
failedParameterID FailedParameterID,
failedParameterValue FailedParameterValue
}

FailedParameters:: = SEQUENCE OF FailedParameter

delete

Hereinafter, with reference to FIG. 5, the resource management system in the communication system according to the embodiment of the present invention selects a usable channel in the TVWS, that is, the selection of the operating channel in the TVWS will be described in more detail.

5 is a diagram schematically illustrating a channel selection operation of a resource management system in a communication system according to an embodiment of the present invention.

Referring to FIG. 5, in step 510, the CM of the resource management system checks a usable channel in the TVWS. In step 520, it is checked whether the available channel is available in the available channel of the TVWS. Select and assign available channels as operating channels.

At this time, the CM selects an operation channel when there is a channel available in the TVWS, and if there is no available channel, the CM checks the use restriction channel in the TVWS. Here, the CM selects a channel in which the use restriction channel exists and the TVBD can use the use restriction channel as the operation channel in the TVWS, and if the use restriction channel does not exist or the TVBD uses the use restriction channel If not, the channel used by the same type TVBD as the operation channel is checked in the TVBDs registered in the adjacent CM. In this case, the CM selects a channel used as an operation channel of the same type TVBD as an operation channel, and when there is no channel used as the operation channel of the same type TVBD, Lt; / RTI > as the operating channel. Here, the CM selects a channel used as an operation channel by the different type TVBD as an operation channel, and if there is no channel used by the different type TVBD as an operation channel, there is no operation channel for TVBDs registered to the CM Notify.

In this manner, the resource management system in the communication system according to the embodiment of the present invention adjusts the channel usage in the TVWS of the TVBDs registered in the CM according to the number of usable channels in the TVWS and the use of the TVWS in the adjacent CMs By selecting the operation channel of the TVBDs registered in the CM, the operation channels can be effectively selected and allocated, so that a plurality of systems in the TVWS efficiently perform mutual coexistence and frequency sharing. In particular, the CM of the resource management system effectively classifies channels to select an operation channel in the WS band by separating channels according to channel characteristics, in order to adaptively select an operation channel according to a system environment of a plurality of systems. In addition, the CM of the resource management system allocates an operation channel according to the number of channels available in the TVWS and the number of adjacent CMs, that is, adjacent CMs, in order to adaptively select an operation channel according to the system environment of a plurality of systems Thereby effectively allocating a channel to select an operation channel in the WS band.

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;
A coexistence discovery and information server (CDIS) supporting control of the coexistence manager for the plurality of systems; And
And a TVWS database (TV White Space Data Base) for providing channel information of the usable frequency band;
Wherein the coexistence manager includes a plurality of coexistence managers corresponding to the plurality of systems, respectively;
The first coexistence manager of the plurality of coexistence managers divides the usable frequency band based on the channel information of the usable frequency band and the channel information of the neighbor coexistence manager, Respectively,
The first coexistence manager accesses the TVWS database to obtain channel information of the usable frequency band from the TVWS database,
The TVWS database includes a header, a payload, and a data type, and transmits a message including channel information of the usable frequency band to the first coexistence manager A resource management system characterized by.
The method according to claim 1,
Wherein the first coexistence manager allocates an operation channel of the plurality of systems in the usable frequency band through an individual TV channel allocation scheme.
The method according to claim 1,
Wherein the first coexistence manager allocates an operation channel of the plurality of systems in the usable frequency band through a TV channel sharing method between homogeneous and heterogeneous devices.
delete delete The method according to claim 1,
Wherein the first coexistence manager discovers the coexistence enabler registered in the first coexistence manager and the neighbor coexistence manager.
The method according to claim 6,
Wherein the first coexistence manager transmits a request message for requesting measurement information including context information of the plurality of systems to a coexistence enabler registered in the first coexistence manager, Receiving a response message including the measurement information from a coexistence enabler registered in the first coexistence manager;
Wherein the first coexistence manager identifies the coexistence enabler registered in the first coexistence manager through the measurement information;
Wherein the request message and the response message include a header, a payload, and a data type.
The method according to claim 6,
The first coexistence manager transmits a first request message to the coexistence discovery and information server requesting the list of the neighbor coexistence managers and information of systems registered in the neighbor coexistence manager to the coexistence discovery and information server, Receiving from the coexistence discovery and information server a first response message including a list of the neighbor coexistence managers and information of systems registered in the neighbor coexistence manager;
Wherein the first coexistence manager distinguishes the neighbor coexistence manager from the list of the neighbor coexistence managers and information on systems registered in the neighbor coexistence manager;
Wherein the first request message and the first response message include a header and a payload.
9. The method of claim 8,
Wherein the first coexistence manager transmits a second request message for requesting information of systems registered in the neighbor coexistence manager to the neighbor coexistence manager and transmits a second request message from the neighbor coexistence manager in response to the second request message, Receiving a second response message including information of systems registered in the manager;
Wherein the second request message and the second response message include a header, a payload, and a data type.
10. The method of claim 9,
Wherein the first coexistence manager receives a third request message requesting information of systems registered in the neighbor coexistence manager from a coexistence enabler registered in the first coexistence manager, Transmitting a third response message including information of systems registered in the neighbor coexistence manager to a coexistence enabler registered in the first coexistence manager;
Wherein the third request message and the third response message include a header and a payload.
The method of claim 1, wherein the first coexistence manager comprises:
A use channel of the plurality of systems and a use channel of systems registered in the adjacent coexistence manager in the usable frequency band;
A usage channel of systems registered in the adjacent coexistence manager in a restricted channel of the first frequency band;
Wherein the resource management system selects and uses the use channels as operation channels of the plurality of systems.
12. The method of claim 11,
Wherein the first coexistence manager transmits a reconfiguration request message requesting reconfiguration to the coexistence enabler registered in the first coexistence manager and transmits a reconfiguration request message to the coexistence manager registered in the first coexistence manager, Receive a reset response message from the enabler;
Wherein the first coexistence manager confirms reconfiguration of the coexistence enabler registered in the first coexistence manager through the reconfirmation response message to determine an operation channel allocation;
Wherein the reset response message comprises a header, a payload, and a data type.
A method for a first coexistence manager to manage resources in a first frequency band in a communication system including a plurality of systems having no usage rights for a first frequency band,
When the available frequency band is found in the first frequency band, channel information of the usable frequency band is obtained from a TVWS database (TV White Space Data Base) providing channel information of the usable frequency band Obtaining;
Obtaining channel information of a neighbor coexistence manager from a plurality of coexistence managers for coexistence and frequency sharing of the plurality of systems in the usable frequency band; And
And allocating an operation channel of the plurality of systems by dividing the usable frequency band based on the channel information of the usable frequency band and the channel information of the neighbor coexistence manager,
The TVWS database includes a header, a payload, and a data type, and transmits a message including channel information of the usable frequency band to the first coexistence manager Characterized by a resource management method.
14. The method of claim 13,
Wherein allocating an operation channel of the plurality of systems allocates an operation channel of the plurality of systems in the usable frequency band through an individual TV channel allocation scheme.
14. The method of claim 13,
The allocating of the operation channels of the plurality of systems allocates operation channels of the plurality of systems in the usable frequency band through a TV channel sharing method between homogeneous and heterogeneous devices Resource management method.
14. The method of claim 13, wherein allocating an operating channel of the plurality of systems comprises:
Receiving a list of the neighbor coexistence managers and information of systems registered in the neighbor coexistence managers to discovery the neighbor coexistence managers; And
And receiving measurement information including context information of the plurality of systems and discovery of a coexistence enabler (CE) of the plurality of systems. How to manage.
17. The method of claim 16,
Wherein the step of distinguishing the coexistence enabler comprises receiving and distinguishing measurement information including context information of the plurality of systems.
17. The method of claim 16,
Wherein the step of allocating an operation channel of the plurality of systems comprises the steps of: allocating an operation channel of the plurality of systems based on channel information of the usable frequency band, a list of the adjacent coexistence managers, And allocating a channel to the resource.
19. The method of claim 18, wherein allocating an operating channel of the plurality of systems comprises:
A use channel of the plurality of systems and a use channel of systems registered in the neighbor coexistence manager in the usable frequency band;
Dividing a restricted channel of the first frequency band into a use channel of systems registered in the neighbor coexistence manager; And
And selecting and using the used channels as an operation channel of the plurality of systems.
20. The method of claim 19,
Wherein the step of assigning an operation channel of the plurality of systems includes receiving reconfiguration information from the coexistence enabler and confirming re-establishment of the coexistence enabler through the reconfiguration information, And allocating the resources to the resource.

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