WO2014017703A1

WO2014017703A1 - System and method for allocating wireless resources

Info

Publication number: WO2014017703A1
Application number: PCT/KR2012/009906
Authority: WO
Inventors: 곽도영; 이종식; 김형중
Original assignee: 주식회사 케이티
Priority date: 2012-07-27
Filing date: 2012-11-22
Publication date: 2014-01-30
Also published as: KR20140015001A; KR101537100B1

Abstract

In order to allocate wireless resources according to a cell re-configuration, a resource allocating system implemented in an in-building environment receives traffic state information transmitted from each of one or more radio units, receives a plurality of radio signals including a plurality of sector signals or a plurality of frequency allocation signals from each of one or more digital units, and divides the plurality of radio signals by the same sector signal and converts them into digital signals. In addition, the divided sector signals that are obtained through the conversion into the digital signals are respectively transmitted to one or more groups of radio units based on the received traffic state information.

Description

Radio resource allocation system and method

The present invention relates to a radio resource allocation system and method.

As communication services change from voice to data, users are demanding more traffic than in the past. In order to meet these requirements, the cell radius of the base station is getting smaller and becomes the core of the network construction method in the solution of appropriately sharing and distributing resources such as cloud communication system.

In addition, in the data-driven communication service environment, users are using more services indoors, so the network construction in the in-building environment is very important. The network construction method for securing service coverage or capacity in an in-building environment includes a repeater using a coaxial cable of the past or a method using a recent femtocell. However, the repeater or femtocell has a disadvantage in that the capacity that the system can provide is limited so that it cannot be efficiently responded to in-building that changes in traffic conditions.

Recently, in building an inbuilding network, a neutral hosting method of establishing a common network and providing a service to a plurality of communication providers has been attracting attention. Neutral Hosting In-building Network integrates signals from radio units (RU) and DUs' digital units (DUs) to integrate radio signals from multiple mobile operators. You need a remote Hub Unit that transmits, an Optical link between the Radio Unit and the Remote Hub Unit. In such a structure, mobile communication providers jointly use network components except for digital units (DUs).

That is, in the case of the forward direction (digital unit → radio unit), the remote hub unit receives and transmits a radio signal of each operator digital unit. In the reverse case, the signal transmitted from the radio unit is filtered for each operator and then transmitted to the digital unit of each operator. The existing neutral hosting network solution is also a transmission method based on analog data such as radio over fiber (ROF) from the remote hub unit to the radio unit. Therefore, it is impossible to efficiently respond to the traffic environment without expanding the network. There are disadvantages.

Accordingly, the present invention provides a system and method for efficiently allocating radio resources in an inbuilding cloud network.

A method for allocating radio resources according to cell reconfiguration by a resource allocation system, which is one feature of the present invention for achieving the technical problem of the present invention,

The resource allocation system interoperates with one or more digital units and one or more radio unit groups to provide wireless services from the one or more digital units to the one or more radio unit groups through one network and from the one or more radio units. Receiving traffic state information transmitted from each other; Receiving a plurality of radio signals each consisting of a plurality of sector signals from the at least one digital unit, and separating the plurality of radio signals into digital signals by separating the plurality of radio signals by the same sector signal; And transmitting each of the separated sector signals converted into the digital signals to the one or more radio unit groups based on the received traffic state information.

Each transmitting to the radio unit group may include: a first radio unit group, which is one of the one or more radio unit groups, includes a first radio unit and a second radio unit connected to the first radio unit; Upon receiving traffic state information from the unit group indicating that a traffic overload has occurred, a sector signal different from a sector signal transmitted to a radio unit group other than the first radio unit group to operate the first radio unit group in a capacitive mode. May be transmitted to the first radio unit group.

Receiving the traffic state information requesting to provide a different sector signal or a frequency allocation signal from the first radio unit and the second radio unit included in the first radio unit group, respectively, the first radio unit and the first radio unit; The method may include transmitting one digital signal including different sector signals to be provided to the second radio unit to the first radio unit group.

Extracting, by the first radio unit, a sector signal for use in the first radio unit from the one digital signal transmitted from the resource allocation system; Converting the extracted sector signal into a radio signal; Transmitting a sector signal included in the digital signal to the second radio unit in addition to the extracted sector signal; And providing the converted radio signal to a terminal in a cell area formed by the first radio unit.

The converting into the digital signal may include determining whether the number of sector signals of the signals received from the one or more data units are the same; And the number of sector signals of the signal transmitted from the second data unit is greater than the number of sector signals of the signal received from the first data unit which is one of the data units. The method may include copying one sector signal of the plurality of sector signals of the second data unit to be equal to the number of sector signals of the first data unit.

Receiving the traffic state information may include receiving, from the radio unit group, signal request information including sector signal information of a digital unit each selected by a plurality of radio units forming the radio unit group. have.

The method may include transmitting a signal corresponding to the sector signal information included in the received signal request information to the radio unit group.

In the system for allocating radio resources in conjunction with at least one digital unit and at least one radio unit group which is another feature of the present invention for achieving the technical problem of the present invention,

A signal receiver which receives one signal each of a plurality of sector signals transmitted from the one or more digital units, respectively; A traffic condition determination unit for receiving traffic information transmitted from each of the one or more radio unit groups; A transmission signal controller for selecting and controlling a digital sector signal to be transmitted to the radio unit group among the signals received by the signal receiver based on the traffic information of the radio unit group received by the traffic condition determination unit; And a signal transmitter for transmitting the digital sector signal selected by the transmission signal controller to the radio unit group.

The system may include a signal processor that divides signals transmitted from one or more digital units received by the signal receiver into a plurality of sector signals, and converts the divided sector signals into signals having the same sectors and converts the signals into digital signals. It may include.

The traffic state determination unit may receive signal request information requested by a radio unit transmitted from the one or more radio unit groups.

The radio unit group is composed of one radio unit and another radio unit interworking with the radio unit,

The radio unit may include: a sector signal receiving unit receiving a digital signal including one or more sector signals from the one or more digital units transmitted from the signal transmitting unit; A sector signal selection unit for selecting a sector signal to be used by the radio unit from a digital signal including one or more sector signals received by the sector signal receiving unit; A signal converter converting the sector signal selected by the sector signal selector into a radio signal; And a signal providing unit that provides the radio signal converted by the signal conversion unit to terminals in a cell area of a cell generated by the radio unit.

The radio unit may include a sector signal transmitter for transmitting a sector signal other than the sector signal selected by the sector signal selector to the another radio unit to which the interworking unit is connected.

The radio unit comprises: a traffic situation collecting unit for collecting a traffic situation of the radio unit itself; And a signal request unit for selecting a sector signal transmitted from the at least one digital unit and requesting the radio resource allocation system according to the traffic state of the radio unit.

According to the present invention, it is possible to provide a suitable wireless capacity for each network leasing provider by supporting the adaptive cell shape change according to the traffic level for each operator, it is possible to provide a competitive wireless network in common network rental business, such as neutral hosting.

1 is an exemplary diagram of an in-building cloud network environment according to an embodiment of the present invention.

2 is a structural diagram of a radio resource allocation system according to an embodiment of the present invention.

3 is a structural diagram of a radio unit according to an embodiment of the present invention.

4 is a flowchart illustrating a radio resource allocation method according to a first embodiment of the present invention.

5 is a flowchart illustrating a radio resource allocation method according to a second embodiment of the present invention.

6 is an exemplary view showing a radio resource allocation method according to a third embodiment of the present invention.

DETAILED DESCRIPTION Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention. In the drawings, parts irrelevant to the description are omitted in order to clearly describe the present invention, and like reference numerals designate like parts throughout the specification.

Throughout the specification, when a part is said to "include" a certain component, it means that it can further include other components, without excluding other components unless specifically stated otherwise.

In the present specification, a terminal is a mobile station (MS), a mobile terminal (MT), a subscriber station (SS), a portable subscriber station (PSS), a user device (User). It may also refer to an Equipment (UE), an Access Terminal (AT), or the like, and may include all or some functions of a mobile terminal, a subscriber station, a portable subscriber station, a user device, and the like.

In the present specification, a base station (BS) is an access point (AP), a radio access station (Radio Access Station, RAS), a Node B (Node B), a base transceiver station (Base Transceiver Station, BTS), MMR ( Mobile Multihop Relay) -BS and the like, and may include all or part of functions such as an access point, a radio access station, a Node B, a base transceiver station, and an MMR-BS.

Hereinafter, a system and method for allocating radio resources according to an embodiment of the present invention will be described with reference to the accompanying drawings. In the embodiment of the present invention, a wireless hosting method is used to efficiently allocate radio resources according to traffic conditions in the in-building using an example.

In a macrocell environment, a virtualization system is often present at the upper end of a digital unit in order to share and distribute resources of several digital units. However, in the in-building environment, in order to distribute and share signals output from a plurality of communication companies or digital units providing a plurality of communication services according to traffic conditions of the in-building, the virtualization system 100 is illustrated in FIG. 1. It will be described with an example of being located between the digital unit 200 and the radio unit group 300.

In the exemplary embodiment of the present invention, the two digital units 200-1 and 200-2 are connected to the virtualization system 100 as an example, but the number of digital units can be extended. In addition, the signal output from the digital unit 200 includes signals that support various services such as Long Term Evolution (LTE), Wideband Code Division Multiple Access (WCDMA), Wireless Broadband Internet (WBro), and Global System for Mobile communications (GSM). Can be output.

In addition, in the embodiment of the present invention, it is assumed that the first digital unit 200-1 and the second digital unit 200-2 transmit three sector signals, respectively. In this case, the first digital unit 200-1 and the second digital unit 200-2 may transmit not only a plurality of sector signals for securing capacities but also a plurality of frequency allocation signals. However, in the exemplary embodiment of the present invention, only sector signals are described as examples for convenience of description.

The virtualization system 100 receives three sector signals DU1_S1, DU1_S2 and DU1_S3 of the first digital unit 200-1 and three sector signals DU2_S1, DU2_S2 and DU2_S3 of the second digital unit 200-2. Each sector is divided and integrated, and sampling and quantization are performed to convert the digital signal. The sector signals of the digital unit converted into digital signals distribute each sector signal to the radio unit group 300 based on the traffic condition information of each radio unit. The sector signal distribution scheme allows the virtualization system 100 to operate as a radio unit of either a capacitive radio unit providing more services or a coverage radio unit extending cell coverage. do.

Here, one radio unit is a cascade of one radio unit 301-1 and a cascade to the radio unit (hereinafter, a cascaded radio unit is referred to as a cascade radio unit for convenience of description). ) Will be described by way of example. The radio unit thus configured is referred to as a radio unit group 301.

The structure of the virtualization system (hereinafter, referred to as a 'wireless resource allocation system') 100 in this network environment will be described with reference to FIG. 2.

As shown in FIG. 2, the radio resource allocation system 100 includes a signal receiver 110, a signal processor 120, a traffic condition determiner 130, a transmission signal controller 140, and a signal transmitter 160. do.

The signal receiver 110 receives a plurality of signals respectively transmitted from the plurality of digital units 200-1 and 200-2 interworking with the radio resource allocation system 100. Signals transmitted from the digital units 200-1 and 200-2 include one or more of one or more sector signals or one or more frequency allocation signals. In the embodiment of the present invention, for convenience of description, the sector signals are taken as examples. Will be explained.

The signal processor 120 divides the signal received by the signal receiver 110 for each sector. After the divided sector-specific signals are integrated with each other, signals from the same sector are converted into digital signals through sampling and quantization to generate digital sector signals. Herein, a method of sampling or quantizing a wireless signal is already known, and detailed descriptions thereof are omitted in the exemplary embodiment of the present invention.

At this time, the signal processor 120 determines whether the capacity of the sector signal or the frequency allocation signal in the signals transmitted from the plurality of digital units 200-1 and 200-2 is the same. If a case where the capacities are not the same occurs, an arbitrary sector in a signal of a digital unit having a small capacity is copied according to the number of sector signals having a large capacity to match the capacity between signals equally.

The traffic state determination unit 130 receives traffic information for each of the radio unit groups 301 to 303 from the plurality of radio unit groups 301 to 303. The traffic state generated in the radio unit groups 301 to 303 is determined based on the received traffic information. In addition, the traffic state determination unit 130 receives signal request information for requesting to provide a signal selected by the radio units 301-1 and 301-2 from the radio units 301-1 and 301-2. The signal request information includes identification information of the radio units 301-1 and 301-2 and sector signal information of the digital units 200-1 and 200-2 to be selected by the radio units 301-1 and 301-2. Included.

The transmission signal controller 140 may generate the digital sector signal generated by the signal processor 120 according to the traffic state of the radio unit determined by the traffic condition determiner 130 or the signal request information received by the traffic condition determiner 130. Control signals to transmit to the radio unit groups 301-303.

For example, it is assumed that three radio unit groups 301 to 303 are connected to the radio resource allocation system 100 in a star type manner as shown in FIG. 1 according to an embodiment of the present invention. Each radio unit group 301-303 cascades one radio unit 301-1, 302-1, 303-1 and another radio unit 301-2, 302-2, 303-3. Assume they are connected in a way.

When the traffic situation required by each radio unit group 301 to 303 is not large, that is, where each radio unit group 301 to 303 is located or where each radio unit 301-1 to 303-2 is located. When the number of service users is not large enough to accommodate all users with one sector signal, the transmission signal controller 140 transmits the same sector signals of the digital units 200-1 and 200-2 transmitting to each radio unit. . At this time, all the radio unit groups 301 to 303 operate with coverage.

However, many service users are gathered in one radio unit (e.g., a first radio unit group) and relatively few users are in another radio unit (e.g., a second radio unit group and a third radio unit group). Assume that a situation has occurred. Then, the transmission signal controller 140 allows the first radio unit group 301 to operate in a capacitive manner to provide a service to many users, and the second radio unit group 302 and the third radio unit group 303. ) Is controlled to provide coverage to a wide area by operating with coverage. This radio resource allocation method will be described in more detail later.

Therefore, the transmission signal controller 140 controls the S1 sector signal to be transmitted to the first radio unit group 301. The second radio unit group 302 and the third radio unit group 303 may be different from the signals transmitted to the first radio unit group 301 but may be different from the second radio unit group 302 and the third radio unit. The group 303 controls to transmit the same S2 sector signals.

In addition, since the transmission signal controller 140 needs to provide more capacity to the radio unit group 301, a cascade radio unit cascaded with the radio unit 301-1 constituting the radio unit group 301 occurs. If it is determined to transmit different signals to the 301-2, two or more sector signals transmitted from the digital units 200-1 and 200-2 are combined into one signal and transmitted to the radio unit group 301. . At this time, in order to transmit two or more sector signals in one optical beam, the transmission capacity of the optical fiber can be reduced by using WDM (Wavelength Division Multiplexing) or other sector signals are integrated in the digital domain when the optical transmission capacity is sufficient. To transmit.

The signal transmitter 160 transmits the sector signals transmitted from the digital units 200-1 and 200-2 to the radio unit groups 301 to 303 under the control of the transmission signal controller 140.

Meanwhile, a structure of the radio unit 300 that receives a signal transmitted from the radio resource allocation system 100 and provides a service to a user will be described with reference to FIG. 3.

As shown in FIG. 3, the radio unit 300 includes a sector signal receiver 310, a sector signal selector 320, a signal converter 330, a signal provider 340, and a sector signal transmitter 350. , The traffic condition collecting unit 360 and the signal requesting unit 370.

The sector signal receiver 110 receives a digital sector signal transmitted from the signal transmitter 160 of the radio resource allocation system 100. At this time, the digital sector signal is transmitted by the transmission signal controller 140 according to the state of the radio unit groups 301 to 303 or the radio units 301-1 to 303-2 determined by the traffic state determination unit 130. The radio units 301-1, 302-1, 303-1 and the cascade radio units 301-2, 302-2, 303-2 constituting the unit groups 301-303 are digital units 200-1,. A signal incorporating one or more sector signals transmitted from 200-2).

The sector signal selector 320 selects a sector signal to be used in the radio unit from the received sector signal when a sector signal including two or more sector signals is received by the sector signal receiver 110. This is because the signal transmitter 160 separates and transmits two signals by using Wavelength Division Multiplexing (WDM), or because different sector signals are integrated in the digital domain. You can only select signals for the unit to use. When the sector signal receiver 110 receives a sector signal including only one sector signal, the sector signal selector 320 does not need to select a sector signal.

The signal converter 330 converts the sector signal selected by the sector signal selector 320 into a wireless radio signal, and the signal provider 340 forms a wireless radio signal converted by the signal converter 330 by the radio unit. Provided to one or more terminals in one cell area.

The sector signal transmitter 350 selects a sector signal to be used in the radio unit including the sector signal selector 320 among the signals composed of two or more sector signals, and then transmits the remaining sector signal to the cascade radio unit.

The traffic condition collecting unit 360 collects traffic conditions of a cell generated by the radio unit itself, and transmits the traffic condition information to the traffic condition determining unit 130 of the radio resource allocation system 100. Alternatively, the traffic condition collecting unit 360 transmits the collected traffic condition to the signal requesting unit 370 so that the radio unit directly selects a signal to use. There may be various methods of collecting traffic conditions, and embodiments of the present invention are not limited to any one method.

The signal requester 370 allocates a sector signal or frequency in a transmission signal transmitted from one or more digital units 200-1 and 200-2 to be used by the radio unit itself based on the traffic conditions collected by the traffic condition collector 360. The signal is selected and requested to provide the signal to the radio resource allocation system 100. Through this, the radio resource allocation system 100 may not only select a signal to be used by the radio unit but also request to provide a signal to be used by the radio unit itself.

Next, a method of allocating a radio resource according to the traffic state of the radio unit by the radio resource allocation system 100 described above will be described with reference to FIGS. 4 and 5. The first embodiment of the present invention allocates radio resources to radio unit groups 301 to 303, and the second embodiment describes a method of differently allocating radio resources within the radio unit groups 301 to 303.

As shown in FIG. 4, the signal receiver 110 receives one or more signals transmitted from one or more digital units 200-1 and 200-2, respectively (S100). In this case, one or more sector signals or one or more frequency allocation signals are included in the signal, and in the embodiment of the present invention, a sector signal is described as an example for convenience of description.

The signal processor 120 divides the plurality of signals received through the S100 step by sector and integrates them. For example, three sector signals such as DU1_S1, DU1_S2, and DU1_S3 are included in a signal transmitted from the first digital unit 200-1 (hereinafter, referred to as 'first signal'), and the second digital unit ( It is assumed that three sector signals, such as DU2_S1, DU2_S2, and DU2_S3, are included in a signal transmitted from the 200-2) (hereinafter, referred to as a 'second signal').

Then, the signal processor 120 may convert the signals of the first and second signals into signals DU1_S1 and DU2_S1 for the first sector, signals DU1_S2 and DU2_S2 for the second sector, and signals for the third sector ( After dividing into DU1_S3 and DU2_S3), the signals for the first sector are combined to generate a signal such as DU1_S1_DU2_S1 when the signal for the first sector is taken as an example. The generated signal is sampled and quantized, converted into a digital signal, and generated (S101).

At this time, the signal processor 120 determines whether the capacity of the sector signal in the signal transmitted from the plurality of digital units 200-1 and 200-2 is the same (S102). That is, since it is assumed that three sector signals are included in the first signal and three sector signals are included in the second signal, the signal processor 120 determines that the capacities of the two signals are the same.

However, if two sector signals are included in the first signal and three sector signals are included in the second signal, the sector capacity is large, that is, the sector in the first signal in accordance with the number of sectors of the second signal. Capacitance is matched by copying the signal (S103). That is, one of the sector signals is copied to include two sector signals DU1_S1 and DU1_S2 in the first signal.

If the second sector signal is copied, three sector signals are included in the first signal such as DU1_S1, DU1_S2, and DU1_S2. In this case, the sector signal to be copied is selected based on a preset reference, and the embodiment of the present invention does not limit the sector signal to one of the reference of the sector signal to be copied.

Next, the traffic state determination unit 130 receives the traffic state information for each radio unit group transmitted from the plurality of radio unit groups 301 to 303 linked with the radio resource allocation system 100 to determine the traffic state ( S104). Then, it is checked whether there is a radio unit group in which the capacity addition is required among the plurality of radio unit groups 301 to 303 (S105).

That is, if a user flock to an area of any radio unit group, determine that the radio unit group should act as a capacitive radio unit. Then, the transmission signal controller 140 determines to transmit a sector signal different from the other radio unit groups to the corresponding radio unit group, and the signal transmitter 160 transmits the signal according to the result controlled by the transmission signal controller 140. It transmits (S106). However, if it is determined that no additional capacity is required, the signal transmitter 160 transmits the same sector signal as other radio unit groups, so that the radio unit group operates with coverage rather than capacitiveness (S107).

Referring to FIG. 1 by way of example, it is assumed that the first radio unit group 301, the second radio unit group 302, and the third radio unit group 303 are molded into the radio resource allocation system 100. do. In addition, it is assumed that a large number of users gather in the cell area generated by the first radio unit group 301 so that the first radio unit group 301 should be operated capacitively.

Then, the transmission signal controller 140 controls to transmit the signal DU1_S1_DU2_S1 for the first sector generated by the signal processor 120 to the first radio unit group 301, and the second radio unit group 302 and The third radio unit group 303 controls to transmit the same signal DU1_S2_DU2_S2 for the second sector. As such, according to the traffic conditions of the radio unit groups 301 to 303, radio resources may be transmitted so that the radio unit groups 301 to 303 operate as either capacitive or coverage by transmitting different sector signals or the same sector signals. Assign.

Meanwhile, in the embodiment of the present invention, different radio frequency signals are also transmitted to each of the radio unit 301-1 and the cascade radio unit 301-2 constituting one radio unit group 301, so that each radio unit 301 -1, 301-2 may provide radio resources to operate capacitively. This will be described with reference to FIG. 5.

As shown in FIG. 5, one or more signals respectively transmitted from one or more digital units 200-1 and 200-2 are received (S200). The signal processor 120 divides the plurality of signals received through the S200 step by sector and integrates them. For example, three sector signals such as DU1_S1, DU1_S2, and DU1_S3 are included in the first signal transmitted from the first digital unit 200-1, and the second signal transmitted from the second digital unit 200-2. It is assumed that three sector signals are included in the signal such as DU2_S1, DU2_S2, and DU2_S3.

Then, the signal processor 120 divides each signal into signals DU1_S1 and DU2_S1 for the first sector, signals DU1_S2 and DU2_S2 for the second sector, and signals DU1_S3 and DU2_S3 for the third sector. Subsequently, a signal is integrated for each sector to generate a signal such as DU1_S1_DU2_S1 when the signal for the first sector is taken as an example. The generated signal is sampled and quantized, converted into a digital signal, and generated (S201).

In this case, the signal processor 120 determines whether the capacity of the sector signal or the frequency allocation signal in the signals transmitted from the plurality of digital units 200-1 and 200-2 is the same (S202). That is, since it is assumed that three sector signals are included in the first signal and three sector signals are included in the second signal, the signal processor 120 determines that the capacities of the two signals are the same.

However, if two sector signals are included in the first signal and three sector signals are included in the second signal, the sector capacity is large, that is, the sector in the first signal in accordance with the number of sectors of the second signal. The capacitance is copied by matching the signal (S203). That is, one of the sector signals is copied to include two sector signals DU1_S1 and DU1_S2 in the first signal.

Next, the traffic state determination unit 130 receives the traffic state information for each radio unit transmitted from the plurality of radio unit groups 301 to 303 linked with the radio resource allocation system 100 to determine the traffic state (S204). ). Then, it is checked whether there is a radio unit group in which the capacity addition is required among the plurality of radio unit groups 301 to 303 (S205).

That is, if users are concentrated in the cell area by the cascade radio unit 301-2 of any radio unit group 301, it is determined that the radio unit group 301 should act as a capacitive radio unit. Then, the transmission signal controller 140 determines to transmit different sector signals to the radio unit 301-1 and the cascade radio unit 302-2 of the radio unit group 301 (S206).

Then, the transmission signal controller 140 transmits two different sector signals (the first sector signal and the second sector signal) among the signals generated through the signals transmitted from the digital units 200-1 and 200-2. Integrating into the digital domain signal (S207). In this case, in the step S207, the first sector signal and the second sector signal will be described as an example of integrating in the digital domain, but may be sent separately by using a WDM method.

The signal transmitter 160 transmits a signal according to the result controlled by the transmission signal controller 140 (S208). However, if it is not necessary to transmit different sector signals to the radio unit and the cascade radio unit, that is, if it is determined that capacity addition is not necessary, the signal transmitter 160 transmits the same sector signal so that the radio unit and the cascade radio unit are the same. The service can be provided to users by using the sector signal (S209).

Referring to the first radio unit group 301 of FIG. 1 as an example, different sectors are formed in the first radio unit 301-1 and the first cascade radio unit 301-2 of the first radio unit group 301. Suppose you send a signal. Then, the transmission signal controller 140 combines the first sector signal DU1_S1_DU2_S1 and the second sector signal DU1_S2_DU2_S2 generated by the signal processor 120 into one signal and transmits them to the first radio unit group 301. To control.

The radio unit 301-1 of the first radio unit group 301 that receives the integrated signal of the first sector signal and the second sector signal receives a sector signal including a plurality of sector signals to be transmitted, and the sector signal. The selector 320 selects only a sector signal to be used by the radio unit 301-1. In addition, the signal converter 330 converts the sector signal selected by the sector signal selector 320 into a radio signal, and then services the terminals in the cell area of the radio unit 301-1 by the signal provider 340. To provide.

Meanwhile, sector signals other than the sector signal selected by the sector signal selector 320 are transmitted to the cascade radio unit 301-2 through the sector signal transmitter 350, and thus the cell area of the cascade radio unit 301-2. It is possible to provide a service having a different capacity from that of the radio unit 301-1 to terminals in the network.

In the radio resource allocation method according to the first and second embodiments of the present invention described above, the traffic situation of each radio unit of the first digital unit 200-1 service and the second digital unit 200-2 service is different. Assuming the same, the radio resource allocation system 100 converts the sector signals into digital signals, combines them into one signal, and transmits the signals to the radio unit. Next, when the traffic situation for each radio unit is different for each of the first digital unit 200-1 service and the second digital unit 200-2 service according to the third embodiment of the present invention, the radio resource allocation system 100 A method of transmitting sector signals in consideration of traffic conditions for each radio unit after converting sector signals of the digital units into digital signals and integrating the signals in the radio unit and transmitting the signals as radio signals will be described with reference to FIG. 6. .

When each of the first digital unit 200-1 and the second digital unit 200-2 transmits three sector signals, the radio resource allocation system 100 is transmitted from the first digital unit 200-1. The signal and the signal transmitted from the second digital unit 200-2 are received, converted into digital signals, and separated into sector signals. In this case, the radio resource allocation system 100 has six signal banks as shown in Table 1 below.

Table 1

DU1_S1	DU2_S1
DU1_S2	DU2_S2
DU1_S3	DU2_S3

As shown in FIG. 6, the radio unit determines traffic conditions for each radio unit required by each radio unit, and determines which mesh unit line transmits the sector signal of which digital unit. In this case, one or more sector signals may be transmitted through one optical line.

The radio unit receives one or more sector signals and then selects which signal to transmit to the radio signal. In the digital domain, sector signals are integrated and then converted into radio signals.

Referring to the third radio unit group 303 as an example, the third radio unit 303-1 of the third radio unit group 303 includes the first sector signal and the second sector signal of the first digital unit 200-1. The third sector signal of the digital unit 200-2 is operated capacitively, and the cascaded third radio unit 303-2 receives the third sector signal of the second digital unit 200-2 to receive a user. Assume that you have decided to provide services to them.

Then, the radio resource allocation system 100 transmits the first sector signal and the second digital unit 200-2 of the first digital unit 200-1 based on the signal request information transmitted from the third radio unit group 303. The third sector signal of the signal is generated as one signal and transmitted to the third radio unit group 303. The third radio unit converts both the first sector signal and the third sector signal into a radio signal to use for providing a service to a user. However, the connected cascade third radio unit converts only the third sector signal among the transmitted signals into a radio signal to use for providing a service to a user.

Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and various modifications and improvements of those skilled in the art using the basic concepts of the present invention defined in the following claims are also provided. It belongs to the scope of rights.

Claims

A method of allocating radio resources according to cell reconfiguration by a resource allocation system,

The resource allocation system interoperates with one or more digital units and one or more radio unit groups to provide services from the one or more digital units to the one or more radio unit groups through one network,

Receiving traffic state information transmitted from each of the one or more radio units;

Receiving a plurality of radio signals each consisting of a plurality of sector signals from the at least one digital unit, and separating the plurality of radio signals into digital signals by separating the plurality of radio signals by the same sector signal; And

Transmitting each of the separated sector signals converted into the digital signals to the one or more radio unit groups based on the received traffic state information.

Radio resource allocation method comprising a.
The method of claim 1,

Each transmitting to the radio unit group,

A first radio unit group, which is one of the one or more radio unit groups, includes a first radio unit and a second radio unit coupled to the first radio unit,

Upon receiving traffic state information indicating that a traffic overload has occurred from the first radio unit group, a sector signal transmitted to a radio unit group other than the first radio unit group to operate the first radio unit group in a capacitive mode. And a different sector signal to the first radio unit group.
The method of claim 2,

When receiving the traffic state information requesting to provide different sector signals or frequency allocation signals from the first radio unit and the second radio unit included in the first radio unit group, respectively.

Transmitting to the first radio unit group one digital signal comprising different sector signals to be provided to the first radio unit and the second radio unit;

Radio resource allocation method comprising a.
The method of claim 3,

Extracting, by the first radio unit, a sector signal for use in the first radio unit from the one digital signal transmitted from the resource allocation system;

Converting the extracted sector signal into a radio signal;

Transmitting a sector signal included in the digital signal to the second radio unit in addition to the extracted sector signal; And

Providing the converted radio signal to a terminal in a cell area formed by the first radio unit;

Radio resource allocation method comprising a.
The method of claim 1,

Converting to the digital signal,

Determining whether the number of sector signals of signals respectively received from the one or more data units is the same; And

If the number of sector signals of the signal received from the first data unit which is one of the data units is larger than the number of sector signals of the signal transmitted from the second data unit, the number of sector signals of the signal transmitted from the second data unit is determined. Copying one sector signal of the plurality of sector signals of the second data unit to be equal to the number of sector signals of the first data unit

Radio resource allocation method comprising a.
The method of claim 1,

Receiving the traffic state information,

Receiving, from the radio unit group, signal request information including sector signal information of a digital unit each selected by a plurality of radio units forming the radio unit group;

Radio resource allocation method comprising a.
The method of claim 6,

Transmitting a signal corresponding to sector signal information included in the received signal request information to the radio unit group

Radio resource allocation method further comprising.
The method of claim 1,

The radio signal is composed of any one of a plurality of sector signals or a plurality of frequency allocation signals,

The radio resource allocation system is implemented in an inbuilding environment.
A system for allocating radio resources in association with at least one digital unit and at least one radio unit group, the system comprising:

A signal receiver which receives one signal each of a plurality of sector signals transmitted from the one or more digital units, respectively;

A traffic condition determination unit for receiving traffic information transmitted from each of the one or more radio unit groups;

A transmission signal controller for selecting and controlling a digital sector signal to be transmitted to the radio unit group among the signals received by the signal receiver based on the traffic information of the radio unit group received by the traffic condition determination unit; And

A signal transmitter for transmitting the digital sector signal selected by the transmission signal controller to the radio unit group

Radio resource allocation system comprising a.
The method of claim 9,

A signal processor for dividing the signals transmitted from the one or more digital units received by the signal receiver into a plurality of sector signals, and converting the divided sector signals into signals having the same sectors and converting the signals into digital signals;

Radio resource allocation system comprising a.
The method of claim 9,

The traffic state determination unit, the radio resource allocation system for receiving the signal request information requested by the radio unit transmitted from the at least one radio unit group.
The method of claim 11,

The transmission signal control unit,

And selecting and controlling a digital signal to be transmitted to the radio unit group based on the signal request information received by the traffic state determination unit.
The method of claim 9,

The radio unit group is composed of one radio unit and another radio unit interworking with the radio unit,

The radio unit,

A sector signal receiver for receiving a digital signal including one or more sector signals from the one or more digital units transmitted from the signal transmitter;

A sector signal selection unit for selecting a sector signal to be used by the radio unit from a digital signal including one or more sector signals received by the sector signal receiving unit;

A signal converter converting the sector signal selected by the sector signal selector into a radio signal; And

Signal providing unit for providing the radio signal converted by the signal conversion unit to the terminals in the cell area of the cell generated by the radio unit

Radio resource allocation system comprising a.
The method of claim 13,

The radio unit,

A sector signal transmission unit for transmitting a sector signal other than the sector signal selected by the sector signal selection unit to the another radio unit to which the interworking unit is connected.

Radio resource allocation system comprising a.
The method of claim 14,

The radio unit,

A traffic state collecting unit collecting the traffic state of the radio unit itself; And

A signal request unit which selects a sector signal transmitted from the at least one digital unit and requests the radio resource allocation system according to the traffic state of the radio unit

Radio resource allocation system comprising a.
The method of claim 11,

The digital signal is divided by a Wavelength Division Multiplexing (WDM) scheme and a sector signal transmitted or a signal generated by integrating different sector signals in a digital domain.