KR20080076263A - Method and system for allocating resource in a communication system - Google Patents

Method and system for allocating resource in a communication system Download PDF

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Publication number
KR20080076263A
KR20080076263A KR1020070015981A KR20070015981A KR20080076263A KR 20080076263 A KR20080076263 A KR 20080076263A KR 1020070015981 A KR1020070015981 A KR 1020070015981A KR 20070015981 A KR20070015981 A KR 20070015981A KR 20080076263 A KR20080076263 A KR 20080076263A
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South Korea
Prior art keywords
frequency band
frequency bands
frequency
mobile terminal
base station
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KR1020070015981A
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Korean (ko)
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김도영
박동식
최호규
홍성권
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삼성전자주식회사
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Priority to KR1020070015981A priority Critical patent/KR20080076263A/en
Publication of KR20080076263A publication Critical patent/KR20080076263A/en

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/16—Central resource management; Negotiation of resources or communication parameters, e.g. negotiating bandwidth or QoS [Quality of Service]
    • H04W28/26—Resource reservation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The present invention relates to a method and a system for allocating resources by selecting a frequency band in a Cognitive Radio (CR) communication system. To this end, the present invention provides a resource allocation method in a communication system including a first system having a use right for a first frequency band and a second system not having a use right for the first frequency band. Transmitting a search information to a base station by searching for a plurality of frequency bands usable in the first frequency band by a mobile terminal of a system; and transmitting a second frequency band of the frequency bands from the base station according to the search information. And receiving the reserved frequency bands other than the second frequency band from the frequency bands.

Description

METHOD AND SYSTEM FOR ALLOCATING RESOURCE IN A COMMUNICATION SYSTEM}

1 is a view schematically showing the structure of a CR communication system according to an embodiment of the present invention;

2 schematically illustrates a frame structure of a CR communication system according to an embodiment of the present invention.

3 is a diagram illustrating an operation process of a secondary system BS in a CR communication system according to an embodiment of the present invention.

4 is a flowchart illustrating an operation of a secondary system MS in a CR communication system according to an exemplary embodiment of the present invention.

The present invention relates to a communication system, and more particularly, to a method and system for allocating resources by selecting a frequency band in a Cognitive Radio (CR) communication system.

In the next generation communication system, active researches are being conducted to provide users with services having high quality of service (QoS: Quality of Service, hereinafter referred to as 'QoS'). In particular, in the current next generation communication system, a wireless local area network (LAN) system and a wireless metropolitan area network (MAN) system Researches are being actively conducted to support high-speed services in a form of guaranteeing mobility and QoS in a broadband wireless access (BWA) communication system such as Representative communication systems are the Institute of Electrical and Electronics Engineers (IEEE) 802.16a / d communication system and the IEEE 802.16e communication system.

The IEEE 802.16a / d communication system and the IEEE 802.16e communication system, which are the BWA communication system, orthogonal frequency division multiplex (OFDM) to support a broadband transmission network on a physical channel of the wireless MAN system. Division Multiplexing (hereinafter referred to as "OFDM") / Orthogonal Frequency Division Multiple Access (OFDMA) scheme is a communication system that applies. The IEEE 802.16a / d communication system currently considers only a single cell structure and a state in which a subscriber station (SS) (hereinafter referred to as SS) is fixed, i.e., does not consider SS mobility at all. System. In contrast, the IEEE 802.16e communication system is a system considering the mobility of the SS in the IEEE 802.16a communication system, and the SS having the mobility is referred to as a mobile station (MS). Shall be.

In addition, the BWA communication system uses a limited resource, that is, a frequency resource, a code resource, a time slot resource, and the like, by dividing and using a plurality of cells constituting the communication system. Should be used efficiently. In particular, the demand for wireless resources is increasing day by day due to the rapid development of wireless communication systems and the emergence of various services. However, due to the allocation of almost all frequency bands that are currently commercially available, there is a very shortage of frequency resources for new wireless platforms. Given the current frequency usage, few GHz bands, especially low frequency bands, have little room for use. In order to solve such a frequency shortage problem, a CR communication system based on the CR method has been proposed. The CR communication system detects a frequency band to which a frequency is allocated but is not actually used, and efficiently shares and uses the frequency band. This CR communication system is a communication system that can be used in conjunction with the next generation communication system currently being studied. A representative communication system of such a CR communication system is an IEEE 802.22 WRAN (Wireless Regional Area Networks) system. The IEEE 802.22 WRAN system adopts CR technology in a TV frequency band, and intends to use an unused TV band for data transmission and reception. will be.

However, in the CR communication system, even if the secondary system secures and uses the frequency resource, if the primary system intends to use the frequency band used by the CR communication system, The system must empty the frequency band immediately. Here, the main system means a communication system having a right to use a legal frequency band.

In addition, the sub-system measures the strength of the received signal in the frequency band selected by the sub-system itself to select and use a frequency band not used by the main system as described above. That is, the secondary system measures the strength of the received signal in the frequency band to detect a frequency band in which the frequency is assigned to the primary system but is not actually used. Then, the sub system detects that the main system is not used in the predetermined frequency band through the measured strength of the received signal, and selects and uses the detected frequency band. In this case, the signal received by the sub system may include not only a transmission / reception signal of the main system but also an interference signal, for example, a transmission / reception signal of another sub system. That is, it is determined that the other system uses a predetermined frequency band in which the signal strength is measured for use by the sub system.

However, as described above, when measuring the intensity of a received signal to detect a frequency band that is allocated to the main system but is not actually used, it is determined whether the received signal is a signal of the main system or an interference signal. Impossible, there is a problem that the complexity of the system increases when performing a correlation operation of the signal using the periodic characteristics of the main system signal to detect the signal of the main system in the frequency band. In addition, when using the cyclostationary characteristic to detect a signal in the frequency band, for example, a signal of the main system or an interference signal, etc., the latency is increased, so the time required for detecting the frequency band is increased. In addition, there is a problem that the complexity of the system increases as described above.

Accordingly, an object of the present invention is to provide a method and system for allocating resources in a communication system.

Another object of the present invention is to provide a resource allocation method and system for minimizing resource allocation time in a radio-cognitive communication system.

Another object of the present invention is to provide a resource allocation method and system for improving data transmission and reception efficiency in a wireless cognitive communication system.

A method of the present invention for achieving the above objects comprises a first system having a right to use a first frequency band and a second system not having a right to use the first frequency band. In the allocation method, the mobile terminal of the second system searches for a plurality of frequency bands available in the first frequency band and transmits the search information to the base station, and the first of the frequency bands corresponding to the search information; 2 frequency bands are allocated from the base station, and the frequency bands are reserved for the remaining frequency bands except for the second frequency band.

Another method of the present invention for achieving the above objects is a communication system comprising a first system having a right to use a first frequency band, and a second system not having a right to use the first frequency band. In the resource allocation method, the base station of the second system receiving the search information of the plurality of frequency bands available in the first frequency band from the mobile terminal, and the second of the frequency bands in accordance with the search information Allocating a frequency band to the mobile terminal and reserving a frequency band other than the second frequency band from the frequency bands.

A system of the present invention for achieving the above objects comprises a first system having a right to use a first frequency band and a second system not having a right to use the first frequency band. In the allocation system, a plurality of frequency bands available in the first frequency band is searched and transmitted to the base station, and a second frequency band of the frequency bands is allocated from the base station in correspondence with the search information. Receives, from the mobile terminal, search information for a plurality of frequency bands usable in the first frequency band and a mobile terminal for which the remaining frequency bands are reserved in the frequency bands except for the second frequency band, and correspond to the search information. Assigning a second frequency band of the frequency bands to the mobile terminal And the base station that reserves the remaining frequency bands except for the second frequency band in the frequency bands.

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 proposes a resource allocation method and system in a communication system. Here, in the embodiment of the present invention to be described later, IEEE 802.16 communication system which is an Institute of Electrical and Electronics Engineers (IEEE) 802.22 communication system and a broadband wireless access (BWA) communication system. Orthogonal Frequency Division Multiplexing (OFDM) or Orthogonal Frequency Division Multiple Access (OFDMA) Although a Cognitive Radio (CR) communication system is described as an example, the resource allocation method and system proposed by the present invention can be applied to other communication systems.

The present invention also relates to the use of the predetermined frequency band when the first system, that is, the primary system, which has the right to use the predetermined resource, for example, the frequency band, does not use the predetermined frequency band. A frequency that is not used by the primary system, which is the first system, through sensing the spectrum in a second system that does not have a right, that is, a communication system that allows a secondary system to use the predetermined frequency band. The present invention proposes a method and system for allocating resources by scanning a band by the secondary system. In an embodiment of the present invention to be described later, a receiver of the secondary system, for example, a mobile terminal (MS), searches for a frequency band not used by the main system and searches for the frequency band. A method and system for allocating the resource of the found frequency band to the receiver by a transmitter, for example, a base station (BS), which provides a communication service to the receiver to use a frequency band. Suggest.

In an embodiment of the present invention to be described later, the right to use the predetermined frequency band described above, that is, the right to use the predetermined frequency band when the main system having the use right does not use the predetermined frequency band. A communication system that allows a sub system that does not have a predetermined frequency band to use is called a CR communication system. In addition, in the following embodiment of the present invention, for convenience of description, a frequency band in which the main system, which is a first system, has a right to use in the CR communication system is called a first frequency band, and the first frequency band In FIG. 2, a frequency band not actually used by the main system is referred to as a second frequency band. That is, the present invention proposes a method and system for the sub-system to search for the second frequency band and allocate resources of the searched second frequency band.

Here, as described above, the right to use the first frequency band has only a main system that is the first system, and after the sub-system that is the second system searches for the second frequency band, The allocation and use of resources is possible only when the first system does not use the second frequency band. In an embodiment of the present invention to be described later, the sub-system searches for a second frequency band that is not used by the main system. We propose a method and system for allocating them.

In this case, the communication system according to an embodiment of the present invention detects a spectrum in a frequency band not used by the main system, for example, the first frequency band, thereby allowing one or more usable frequency bands, for example, a second frequency band and a third frequency band. And allocate a frequency band having the best channel state among the searched frequency bands, for example, a second frequency band, to the sub system, and also reserve the third frequency band to be allocated to the sub system. Accordingly, when the secondary system attempts to use the second frequency band allocated to the secondary system while the secondary system transmits and receives data using the second frequency band, the secondary system uses the reserved third frequency band. Data is transmitted and received, and the sub-system reports that the reserved frequency band is to be used without searching for the available frequency band through spectrum sensing, and then transmits and receives data through the reserved frequency band, that is, changes the used frequency band. .

That is, in the present invention, when a frequency band not used by the primary system is allocated to the secondary system, the secondary system detects and searches for a plurality of usable frequency bands, and the searched frequency bands correspond to a channel state. And assigns a frequency band according to the allocation priority, that is, allocates a frequency band having the best channel state to the sub system, and the remaining frequency bands correspond to the allocation priority. Reserved to be assigned to. Then, if the main system intends to use the frequency band currently being used by the main system, the time required for frequency allocation is reduced by using the reserved frequency band in accordance with the allocation priority. Next, a CR communication system according to an exemplary embodiment of the present invention will be described with reference to FIG. 1.

1 is a view schematically showing the structure of a CR communication system according to an embodiment of the present invention.

Referring to FIG. 1, a CR communication system includes cell 1 110, which is a primary system cell, and cell 2 150, which is a secondary system cell, and has a right to use a predetermined resource, that is, a frequency band, in cell 1 110. That is, it includes a main system having a usage right, and a sub-system that does not have a right to use the frequency band when the main system does not use the frequency band in cell 2 (150). do. The primary system includes BS1 112, which is a primary BS, and MS1 114, which is a primary MS that receives communication service from the BS1 112, and the secondary system is a secondary BS. BS2 152, which is a secondary BS, and MS2 154, which is a secondary MS that receives communication service from the BS2 152.

BS1 112 of the main system provides the MS's current location information and channel state information (CSI: Channel State) from MS1 114 while providing communication service to MS1 114 through a predetermined frequency band as described above. Information, hereinafter referred to as 'CSI'). At this time, the MS2 154 of the secondary system measures the interference information according to its communication environment, for example, noise and interference conditions, so that the frequency band which is not occupied at the position where it is present, that is, the main system has a right to use it. In the frequency band having a frequency band BS1 (112) and MS1 (114) of the main system is selected that is not used. That is, the MS2 154 of the secondary system senses the spectrum of the signal received in the frequency band, for example, the first frequency band, to which the main system has authority to use, so that the MS2 154 of the secondary system can use its own frequency band, such as the second frequency band and the third. Search for frequency bands. In addition, the MS2 154 measures the channel state of the usable frequency bands, that is, the second frequency band and the third frequency band through the spectrum detection.

Here, for convenience of description, the MS2 154 searches for only two frequency bands, that is, the second frequency band and the third frequency band. However, the MS2 154 is one or more frequency bands, that is, the first frequency band. Search all available frequency bands in one frequency band. In addition, although only the MS2 154 detects the spectrum and searches for an available frequency band, the BS2 152 as well as the MS2 154 also detects the spectrum and use the available frequency band, that is, the sub-system can use it. Search for frequency bands.

Then, the MS2 154 transmits search information, that is, information on the second frequency band and the third frequency band, which are usable frequency bands, and the CSI of the second frequency band and the third frequency band to the BS2 152. do. BS2 152 receiving the available frequency bands, the search information of the second frequency band and the third frequency band, and the CSI, determines the priority of allocation of the second frequency band and the third frequency band according to the CSI. Allocating a frequency band to the MS2 154 according to the priority, for example, if the second frequency band has a better channel state than the third frequency band, the second frequency band is allocated to the MS2 154. Thereafter, the third frequency band is reserved for allocation to the MS2 154.

In more detail, the BS2 152 is a frequency band having the best channel state among the available frequency bands reported from the MS2 154, that is, the second frequency band and the third frequency band, that is, the second frequency band. A frequency band is allocated to the MS2 154, and the third frequency band is reserved for use by the MS2 154 when the main system intends to use the second frequency band. After allocating the second frequency band to the MS2 154 and reserving the third frequency band, the BS2 152 allocates the allocation information, that is, the second frequency band allocation information and the reservation information, that is, the third frequency band reservation information. Is sent to the MS2 154.

As described above, when not only the MS2 154 but also the BS2 152 detect the spectrum and search for a usable frequency band, the BS2 152 may have its own frequency band and the MS2 152. The searched frequency bands are compared and the optimal frequency bands are allocated to the MS2 154, and the remaining frequency bands are reserved according to the allocation priority. The BS2 152 then transmits allocation information and reservation information to the MS2 154. The frequency band search of the BS2 152 may be different from the channel environment of the MS2 154 and the channel environment of the BS2 152. Accordingly, the available frequency band and the BS2 152 searched by the MS2 154 may be different. The available frequency bands searched by) are different to prevent the malfunction of frequency band allocation to the MS2 154.

Upon receiving the allocation information and the reservation information, the MS2 154 transmits and receives data with the BS2 152 through the allocated frequency band, that is, the second frequency band. In this case, when the spectrum is detected and the main system intends to use the second frequency band currently being used, the MS2 154 uses the reserved third frequency band instead of the second frequency band, that is, the second frequency. After reporting to the BS2 152 that the band is to be used by the main system to use the third frequency band, data is transmitted and received with the BS2 152 through the third frequency band. Next, a frame of a CR communication system according to an exemplary embodiment of the present invention will be described with reference to FIG. 2.

2 is a diagram schematically illustrating a frame structure of a CR communication system according to an embodiment of the present invention.

Referring to FIG. 2, in the CR communication system, a section in which the MS of the secondary system detects a spectrum in the first frame 210 to search for a frequency band not used by the main system, that is, a frequency band usable by the secondary system (Quiet). Period sensing time (hereinafter referred to as 'QP') 212, a reporting period 214 for transmitting the search information of the usable frequency band and the CSI of the usable frequency band to the BS of the secondary system; Determining the frequency band allocation priority through the CSI and the search information received from the MS, and assigns and reserves the frequency band to the MS in accordance with the determined priority, and then transmits the frequency band allocation information and the reservation information to the MS. An allocation section 216, and a transmission and reception section 218 for transmitting and receiving data between the BS and the MS through the allocated frequency band.

In addition, in the second frame 220, the MS of the secondary system detects the spectrum to search whether the primary system is used for the currently allocated frequency band, that is, whether the currently allocated frequency band is available or not, and A reporting section 224 for reporting information on whether the allocated frequency band is available to the BS of a sub-system, and a transmission / reception section 226 for transmitting and receiving data between the BS and the MS through the allocated frequency or the reserved frequency band. ).

Here, as a result of the search in the QP 222 searching for the availability of the currently allocated frequency band, if the main system wants to use the currently allocated frequency band, the MS reserves the reservation received in the allocation interval 216. In response to the information, it is reported that the data will be transmitted / received in the transmission / reception section 226 of the second frame 220 through the reserved frequency band. The MS then transmits and receives data over the reserved frequency band. That is, in the CR communication system according to the embodiment of the present invention, since only the first frame 210 has an allocation section 216 and the second frame 220 does not have an allocation section, the data transmission / reception section 226 is extended. It improves data transmission efficiency and resource utilization efficiency, and minimizes resource allocation time by reserving available frequency bands. Next, the BS operation of the secondary system in the CR communication system will be described with reference to FIG. 3.

3 is a diagram illustrating an operation process of a secondary system BS in a CR communication system according to an embodiment of the present invention.

Referring to FIG. 3, in step 301, the BS determines the CSI of the available frequency band and the search information including the information on the frequency band that the sub system can use, that is, the MS of the sub system can use as described above. Receive from the MS. Then, in step 303, the BS checks the search information and the CSI to determine the allocation priority of the available frequency band, allocates the frequency band to the MS according to the determined priority, that is, allocates resources. When the main system uses the allocated frequency band, the available frequency band is reserved, and the frequency band allocation information and the reservation information are transmitted to the MS. Since the allocation and reservation of the frequency band has been described above in detail, detailed description thereof will be omitted herein.

Next, in step 305, the BS receives a report from the MS whether or not the main system is used for the frequency band currently allocated to the MS and checks whether the frequency band is available. As a result of checking in step 305, if the main system does not use the currently allocated frequency band, the process proceeds to step 307. In step 307, the BS transmits and receives data with the MS using the currently allocated frequency band.

On the other hand, if it is determined in step 305 that the main system wants to use the currently allocated frequency band, the process proceeds to step 309. In step 309, the BS uses the frequency band reserved in step 303 to communicate with the MS. Send and receive Hereinafter, an MS operation of a sub system in a CR communication system according to an exemplary embodiment of the present invention will be described with reference to FIG. 4.

4 is a diagram illustrating an operation process of a sub system MS in a CR communication system according to an exemplary embodiment of the present invention.

Referring to FIG. 4, in step 401, the MS detects a spectrum as described above to search for a frequency band not used by the main system, that is, a frequency band available for itself, and then in step 403, the MS detects the spectrum. The search information indicating and the CSI of the usable frequency band are transmitted to the BS. In this case, the MS searches all frequency bands not used by the main system, that is, a plurality of frequency bands, in the frequency band to which the main system has authority to use as described above, and searches the CSI and the search of the plurality of searched frequency bands. Send the information to the BS.

Then, in step 405, the MS is allocated an available frequency band, that is, resources corresponding to the search information and the CSI, and reserves an available frequency band when the main system uses the allocated frequency band, and allocates the frequency band. Receive information and reservation information from BS. Next, in step 407, the MS detects the spectrum in the currently allocated frequency band to determine whether the currently allocated frequency band is available, that is, whether the main system intends to use the currently allocated frequency band. At this time, the MS reports the identification information corresponding to the verification result to the BS. If the main system does not use the currently allocated frequency band as a result of the check in step 407, the process proceeds to step 409. In step 409, the MS uses the currently allocated frequency band to establish a connection with the BS. Send and receive data.

On the other hand, if it is determined in step 407 that the main system wants to use the currently allocated frequency band, the process proceeds to step 411. In step 411, the MS uses the reserved frequency band in step 405 to transmit data to the BS. Send and receive

Meanwhile, in the detailed description of the present invention, specific embodiments have been described, but various modifications are possible without departing from the scope of the present invention. Therefore, the scope of the present invention should not be limited to the described embodiments, but should be defined not only by the scope of the following claims, but also by the equivalents of the claims.

As described above, the present invention allocates and reserves a frequency band usable by the secondary system in the radio-cognitive communication system, thereby transmitting and receiving data using the reserved frequency band when the primary system uses the allocated frequency band. Accordingly, the present invention improves data transmission efficiency and resource use efficiency by minimizing resources used for data transmission and reception, and minimizes resource allocation time.

Claims (40)

A resource allocation method in a communication system comprising a first system having a usage right for a first frequency band and a second system having no use right for the first frequency band, Transmitting, by the mobile terminal of the second system, a plurality of frequency bands usable in the first frequency band and transmitting search information to a base station; And a second frequency band of the frequency bands is allocated from the base station in response to the search information, and the remaining frequency bands other than the second frequency band are reserved in the frequency bands. The method of claim 1, If the second system detects the use of the first system for the second frequency band while using the second system, using the reserved frequency bands. . The method of claim 2, The detecting of the use of the first system with respect to the second frequency band may include detecting a spectrum in the second frequency band. The method of claim 1, The transmitting of the search information to the base station, resource allocation method, characterized in that for transmitting the channel state information (CSI: Channel State Information) of the available plurality of frequency bands. The method of claim 4, wherein The step of assigning the second frequency band from the base station, resource allocation method, characterized in that the allocation of the second frequency band having the best channel state of the frequency bands. The method of claim 4, wherein In the receiving of the remaining frequency bands, an allocation priority is determined according to the channel state information, and the remaining frequency bands are reserved according to the determined priority. The method of claim 6, If the second system detects the use of the first system for the second frequency band while using the second system, using the third frequency band having the highest priority among the remaining reserved frequency bands. A resource allocation method characterized by the above-mentioned. The method of claim 7, wherein The detecting of the use of the first system with respect to the second frequency band may include detecting a spectrum in the second frequency band. The method of claim 1, The searching of the plurality of frequency bands available in the first frequency band and transmitting search information to the base station includes: detecting the spectrum in the first frequency band to search the plurality of frequency bands, and searching for the found frequency band. Resource allocation method characterized in that the transmission of the search information including the information. The method of claim 1, The process of allocating the second frequency band and reserving the remaining frequency bands may include: a plurality of frequency bands available in the first frequency band searched by the base station and a plurality of frequency bands searched by the mobile terminal. Resource allocation method characterized in that the allocation and reservation according to the comparison result. A resource allocation method in a communication system comprising a first system having a usage right for a first frequency band and a second system having no use right for the first frequency band, Receiving, by a base station of the second system, search information of a plurality of frequency bands usable in the first frequency band from a mobile terminal; And allocating a second frequency band among the frequency bands to the mobile terminal in response to the search information, and reserving the remaining frequency bands other than the second frequency band from the frequency bands. The method of claim 11, If the second system receives the use of the first system from the mobile terminal for the second frequency band while using the second system, using the reserved frequency bands. Resource allocation method. The method of claim 12, The reporting of the use of the first system for the second frequency band may include reporting the spectrum of the mobile terminal in response to the detection in the second frequency band. The method of claim 11, The receiving of the search information from the mobile terminal, resource allocation method, characterized in that for receiving the channel state information (CSI: Channel State Information) of the available plurality of frequency bands. The method of claim 14, And allocating the second frequency band to the mobile terminal comprises allocating the second frequency band having the best channel state among the frequency bands. The method of claim 14, The step of reserving the remaining frequency bands, the allocation priority is determined in accordance with the channel state information, the resource allocation method, characterized in that for reserving the remaining frequency bands in accordance with the determined priority. The method of claim 16, A third frequency band having the highest priority among the reserved remaining frequency bands when the second system receives a report from the mobile terminal of the use of the first system for the second frequency band while using the second system. Resource allocation method, characterized in that for using. The method of claim 17, The reporting of the use of the first system for the second frequency band may include reporting the spectrum of the mobile terminal in response to the detection in the second frequency band. The method of claim 11, Receiving the search information of the plurality of frequency bands available in the first frequency band from the mobile terminal, the spectrum is detected in the first frequency band and the plurality of frequency bands are retrieved, the information of the retrieved frequency bands Resource allocation method comprising receiving the included search information. The method of claim 11, The step of allocating the second frequency band and reserving the remaining frequency bands includes: searching for a plurality of frequency bands available in the first frequency band by the base station, And allocating and reserving corresponding to a comparison result between a plurality of frequency bands included in the received search information. A resource allocation system in a communication system comprising a first system having a usage right for a first frequency band and a second system having no use right for the first frequency band, Search for a plurality of frequency bands usable in the first frequency band and transmit search information to a base station, and receive a second frequency band of the frequency bands from the base station in correspondence with the search information; A mobile terminal for receiving the remaining frequency bands except for the second frequency band; Receiving search information of a plurality of frequency bands usable in the first frequency band from the mobile terminal, assigning a second frequency band of the frequency bands to the mobile terminal in correspondence with the search information, and the frequency bands And the base station that reserves the remaining frequency bands other than the second frequency band. The method of claim 21, And the base station and the mobile terminal are included in the second system. The method of claim 21, The mobile terminal uses the reserved frequency bands if the second system senses the use of the first system for the second frequency band while using the second system. . The method of claim 23, wherein And the mobile terminal senses a spectrum in the second frequency band to sense the use of the first system for the second frequency band. The method of claim 21, The mobile terminal is a resource allocation system, characterized in that for transmitting the channel state information (CSI: Channel State Information) of the available plurality of frequency bands to the base station. The method of claim 25, And the mobile station is allocated the second frequency band having the best channel state among the frequency bands. The method of claim 25, The mobile terminal, the allocation priority is determined according to the channel state information, the resource allocation system, characterized in that for receiving the remaining frequency bands in accordance with the determined priority. The method of claim 27, If the second system detects the use of the first system for the second frequency band while using the second system, using the third frequency band having the highest priority among the remaining reserved frequency bands. A resource allocation system characterized by the above. The method of claim 28, And the mobile terminal senses a spectrum in the second frequency band to sense the use of the first system for the second frequency band. The method of claim 21, The mobile terminal detects the spectrum in the first frequency band, searches for the plurality of frequency bands, and transmits search information including the information of the searched frequency bands. The method of claim 21, The mobile terminal is allocated the second frequency band according to a comparison result between a plurality of frequency bands usable in the first frequency band searched by the base station and a plurality of frequency bands searched by the mobile station, And the remaining frequency bands are reserved. The method of claim 21, And the base station uses the reserved frequency bands when the second system receives a report from the mobile terminal of the use of the first system for the second frequency band while using the second system. Resource Allocation System. 33. The method of claim 32, And the base station is informed of the use of the first system for the second frequency band in response to sensing the spectrum of the mobile terminal in the second frequency band. The method of claim 21, The base station, the resource allocation system, characterized in that for receiving the channel state information (CSI: Channel State Information) of the available plurality of frequency bands from the mobile terminal. The method of claim 34, wherein And the base station allocates the second frequency band having the best channel state among the frequency bands. The method of claim 34, wherein And the base station determines an allocation priority according to the channel state information, and reserves the remaining frequency bands according to the determined priority. The method of claim 36, The base station has the highest priority among the reserved frequency bands if the second system receives a report from the mobile terminal of the use of the first system for the second frequency band while using the second system. And a third frequency band is used. The method of claim 37, And the base station is informed of the use of the first system for the second frequency band in response to sensing the spectrum of the mobile terminal in the second frequency band. The method of claim 21, The base station, the spectrum is detected in the first frequency band, the plurality of frequency bands are searched, and the resource allocation system, characterized in that for receiving the search information including the information of the searched frequency bands from the mobile terminal. The method of claim 21, The base station searches for a plurality of frequency bands available in the first frequency band and corresponds to a comparison result between the plurality of searched frequency bands and a plurality of frequency bands included in search information received from the mobile terminal. And the second frequency band is allocated, and the remaining frequency bands are reserved.
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11711862B1 (en) 2021-07-15 2023-07-25 T-Mobile Usa, Inc. Dual connectivity and carrier aggregation band selection

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US11711862B1 (en) 2021-07-15 2023-07-25 T-Mobile Usa, Inc. Dual connectivity and carrier aggregation band selection

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