KR101189093B1 - Method for optimizing load of base station, apparatus therefor - Google Patents

Abstract

PURPOSE: A base station load optimizing method and an apparatus thereof are provided to perform backup of wireless resource and to control traffic load through signal switch between interconnected base stations. CONSTITUTION: A condition confirmation unit(210) confirms a traffic condition of a first base station and a second base station. The first base station is connected to the second base station. A wireless resource backup unit(212) performs backup of each wireless resource of the first base station and the second base station based on a confirming result of the condition confirmation unit. A wireless resource allocating unit(220) reallocates each wireless resource of the first base station and the second base station based on the confirming result. [Reference numerals] (210) Condition confirming unit; (212) Wireless resource backup unit; (220) Wireless resource allocating unit; (230) Switching unit; (240) Transmitting unit; (AA) First base station; (BB) Transmitting unit; (CC) Switching unit; (DD) Wireless resource backup unit; (EE) Wireless resource allocating unit; (FF) Condition confirming unit; (GG) Second base station

Description

Base station load optimization method and apparatus therefor {Method for Optimizing Load of Base Station, Apparatus Therefor}

One embodiment of the present invention relates to a base station load optimization method and apparatus therefor. More specifically, in order to deal with a sudden increase in traffic, not only the radio resources are backed up through the switching of signals between interconnected base stations, but also the traffic load is adjusted to enable mutual security operations between the base stations to continue service. The present invention relates to a base station load optimization method and apparatus therefor that can solve a traffic imbalance.

The contents described in this section merely provide background information on the embodiment of the present invention and do not constitute the prior art.

Recently, as computers, electronics, and communication technologies have advanced dramatically, various wireless communication services using wireless networks have been provided. Accordingly, a service provided by a mobile communication system using a wireless communication network is developing into a multimedia communication service for transmitting data such as circuit data, packet data, and the like, as well as a voice service.

Meanwhile, with the advent of smart phones, the demand for mobile data is rapidly increasing, and the amount of mobile traffic is expected to increase further. That is, the use of data packets is rapidly increasing due to the appearance of smart phones, which affects the voice service, and thus causes a situation in which the corresponding base station cannot handle the traffic that has increased rapidly, such as a call drop. Doing.

In order to solve the above-mentioned problem, an embodiment of the present invention enables the mutual security operation between base stations by controlling the traffic load as well as backing up radio resources through signal switching between interconnected base stations to handle the traffic spike. The main purpose of the present invention is to provide a base station load optimization method and an apparatus therefor that can maintain the service and solve the traffic imbalance.

One embodiment of the present invention to achieve the above object, the status check unit for checking the traffic (Traffic) status of the first base station and the second base station and the neighboring base station connected to the first base station to cooperate; And a radio resource backup unit configured to back up a radio resource of each of the first base station and the second base station based on a result of the check of the state check unit. .

In addition, according to another object of the present invention, in the method for backing up radio resources between base stations, a status checking step of confirming the traffic state of the first base station which is the interworking base station and the second base station which is the neighboring base station connected to the first base station; ; And a radio resource backup step of backing up radio resources of each of the first base station and the second base station based on a result of the check of the state check unit.

As described above, according to an embodiment of the present invention, in order to handle traffic spikes, not only the radio resources are backed up through signal switching between interconnected base stations, but also the mutual security operation is possible between the base stations by adjusting the traffic load. The service can be continued and the traffic imbalance can be eliminated. In addition, according to an embodiment of the present invention, the topology structure in the connection between the base stations is possible, it is possible to continue the service when a failure occurs among the connected base stations.

In addition, according to an embodiment of the present invention, the base station capacity can be secured without additional expansion of the base station so that the cell load can be effectively managed, and the effective call quality can be provided to the customer by real-time response to traffic changes. have. In addition, according to one embodiment of the present invention, the amount of equipment is reduced by half compared to the conventional method to reduce the cost and the centralized management is possible has the effect of convenient network management and operation.

1 is a block diagram schematically illustrating a radio resource backup system according to an embodiment of the present invention;
2 is a block diagram schematically illustrating a base station load optimization apparatus according to an embodiment of the present invention;
3 is a flowchart illustrating a base station load optimization method according to an embodiment of the present invention;
4 is a block diagram schematically illustrating a radio resource backup system having a paired 1: 1 structure according to an embodiment of the present invention;
5 is a block diagram schematically illustrating a radio resource backup system having a ring structure according to an embodiment of the present invention;
6 is a block diagram schematically illustrating a radio resource backup system of a daisy chain structure according to an embodiment of the present invention;
7 is an exemplary view for explaining an algorithm when switching signals by scheduling according to an embodiment of the present invention;
8 is an exemplary view for explaining an algorithm when signal switching due to a base station failure according to an embodiment of the present invention.

Hereinafter, with reference to the accompanying drawings an embodiment according to the present invention will be described in detail.

The base station load optimization apparatus 112 according to an embodiment of the present invention is a device mounted on a specific base station and interoperates with each other. Hereinafter, in the present invention, the base station on which the base station load optimization apparatus 112 is mounted is referred to as a first base station 110. It is called. In addition, a base station connected to the first base station 110 is referred to as a second base station 120 or a third base station 130 in the present invention. Here, the second base station 120 or the third base station 130 also refers to a base station on which the base station load optimization device 112 is mounted. That is, in order for the first base station 110 and the second base station 120 or the third base station 130 to be connected, the base station load optimization device 112 should be mounted, and because of the mounted base station load optimization device 112, The first base station 110 and the second base station 120 or the third base station 130 is capable of bidirectional communication for radio resource allocation with each other. If the base station load optimization apparatus 112 is not mounted on the second base station 120 or the third base station 130, the first base station 110 and the second base station 120 or the third base station 130 Bidirectional communication for radio resource allocation between each other is not possible.

Meanwhile, in the present invention, the connection structure of the first base station 110 and the second base station 120 or the third base station 130 is a paired 1: 1 structure, a ring structure, or a daisy chain structure. However, this is merely illustrative of the technical idea of the present invention, and those of ordinary skill in the art to which the present invention belongs to the first base station 110 without departing from the essential characteristics of the present invention The connection structure of the second base station 120 or the third base station 130 may be extended and applied in a 1: N manner. That is, the base station connected with the first base station 110 may be further extended to the plurality of base stations as well as the second base station 120 or the third base station 130.

1 is a block diagram schematically illustrating a radio resource backup system according to an embodiment of the present invention.

Radio resource backup system according to an embodiment of the present invention is the first base station 110, the base station load optimization apparatus 112, the donor (114), the remote (116) and the second base station 120 It includes. According to an embodiment of the present invention, the radio resource backup system includes only the first base station 110, the base station load optimization device 112, the donor 114, the remote 116, and the second base station 120. This is merely illustrative of the technical spirit of an embodiment of the present invention, and those skilled in the art to which the embodiment of the present invention belongs should have a wireless range without departing from the essential characteristics of the embodiment of the present invention. Various modifications and modifications to the components included in the resource backup system may be applicable.

The first base station 110 and the second base station 120 refers to an apparatus for performing a location registration function, a function of allocating a radio channel, and various functions necessary for processing radio signals such as handoff. In more detail with respect to the first base station 110 and the second base station 120, the first base station 110 and the second base station 120 includes a base station transmitter (not shown) and a base station controller (not shown). It can be configured and refers to a device of the concept that supports both synchronous and asynchronous. For example, when the first base station 110 and the second base station 120 supports synchronous, the base station transmitter may be a base transceiver station (BTS), the base station controller may be a base station controller (BSC) When the first base station 110 and the second base station 120 supports asynchronous, the base station transmitter may be a Node-B, and the base station controller may be a Radio Network Controller (RNC). In more detail with respect to the base station transmitter and the base station controller included in the first base station 110 and the second base station 120, the base station transmitter transmits and receives a signal with the remote 116 or the terminal through the traffic channel of the signal channel The base station controller controls the base station transmitter to allocate and release radio channels for the terminal, to control transmission output of the terminal and the base station transmitter, to determine soft handoff and hard handoff between cells, and to transcode And perform Vocoding, Global Positioning System (GPS) clock distribution, baseband signal processing, wired / wireless conversion, and transmission and reception of wireless signals.

The first base station 110 and the second base station 120 according to an embodiment of the present invention are Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCMA), Wireless Broadband Internet (WBro), and Long Term (LTE). Evolution) refers to a base station that supports at least one or more. In addition, the first base station 110 and the second base station 120 may be connected in a paired 1: 1 structure, in a ring structure, or in a daisy chain structure. This is merely illustrative of the technical idea of the present invention, and those skilled in the art to which the present invention pertains may be variously modified and modified without departing from the essential characteristics of the present invention. Meanwhile, a 1: 1 structure, a ring structure, and a daisy chain structure refer to a structure capable of bidirectional communication with a redundant path.

The base station load optimization apparatus 112 according to an embodiment of the present invention has a traffic state of a first base station 110 which is a base station to be interworked and a second base station 120 which is a neighboring base station connected to the first base station 110. And reassign the radio resources of each of the first base station 110 and the second base station 120 based on the verification result, and pass the radio resources to the reassigned base station. It transmits by switching radio resources. Here, the relationship between the base station load optimization device 112 and the first base station 110 is a state in which the base station load optimization device 112 is mounted in the first base station 110 to directly interwork with the first base station 110. That is, the relationship between the base station load optimization device 112 and the second base station 120 is a state in which the base station load optimization device 112 communicates with the second base station 120 equipped with another base station load optimization device 112. Say.

The base station load optimization apparatus 112 backs up radio resources of each of the first base station 110 and the second base station 120 based on the result of checking the traffic state of each base station. Meanwhile, to describe in detail how the base station load optimizer 112 backs up the radio resources based on the result of checking the traffic state of each base station, the base station load optimizer 112 reads the result of the traffic state. Compared with the set conditions, and based on the comparison result, the first base station 110 and the second base station 120 need to be checked or recognized as a problem base station in which a warning, failure, error, etc. occurred, and the normal operating base station as a normal base station After recognizing and backing up the radio resources of the problem base station to the normal base station, when the problem base station operates as a normal base station, it performs the function of transmitting the backed up radio resources to the base station. Here, when the base station load optimization apparatus 112 checks the traffic state, if the output value of the base station is less than the preset threshold, the base station may be recognized as a problem base station that needs to be checked or a warning, failure or error occurs.

On the other hand, to describe how the base station load optimization device 112 reallocates radio resources based on the result of confirming the traffic state of each base station, the base station load optimization device 112 is based on a preset condition After the base station 110 and the second base station 120 and the base station that lacks the radio resources based on the comparison result is recognized as a resource shortage base station, and the base station having the surplus radio resources is recognized as a surplus resource base station The radio resources of the surplus resource base station are allocated to the resource lack base station. Here, the meaning that the radio resources of the surplus resource base station is allocated to the insufficient resource base station means that the signal generated by the insufficient resource base station cannot be processed because the processing state of the signal generated in the resource insufficient base station is saturated, and thus, the resource insufficient base station This means that some of the signals generated in S are transferred to the redundant resource base station.

Meanwhile, referring to the method of the base station load optimization device 112 to recognize the resource shortage base station and the surplus resource base station, the base station load optimization device 112 is the current output value of the first base station 110 and the second base station 120 In this saturation state, it is recognized that the radio resources are insufficient. If the current output value is less than the preset value than the maximum output value, it is recognized as having excess radio resources.

In addition, the preset condition used in the base station load optimization apparatus 112 will be described. The preset condition may be at least one or more of a level detection, scheduling, and a failure of the base station. As merely an example of describing the technical idea, one of ordinary skill in the art to which the present invention pertains may apply various modifications and modifications to predetermined conditions without departing from the essential characteristics of the present invention.

Hereinafter, the base station load optimization apparatus 112 will be described in the operation processing in the case of at least one or more of the conditions of the level detection, scheduling and the base station failure, which is a preset condition. The base station load optimization device 112 detects a current output value of each of the first base station 110 and the second base station 120 to detect a level among preset conditions, and then resources the base station whose current output value is less than a preset threshold. After recognizing a base station with a surplus base station, and recognizing a base station having a surplus output value as a surplus resource base station, the signal of the resource deficient base station is transferred to the surplus resource base station so that the surplus resource base station processes the signal of the resource deficient base station. The base station load optimization apparatus 112 transfers a signal of the preset resource shortage base station to a surplus resource base station for a preset time when a preset time due to scheduling arrives for the processing of scheduling among preset conditions. When the base station load optimization device 112 detects a current output value of each of the first base station 110 and the second base station 120 for processing when a failure occurs among preset conditions, the current output value is less than a preset failure threshold. Recognizes the base station as a resource deficient base station, and transfers the signal of the resource deficient base station to the surplus resource base station.

Meanwhile, a connection structure between base stations for radio resource allocation according to an embodiment of the present invention is as follows. That is, the first base station 110 and the second base station 120 are connected in a paired 1: 1 structure, in a ring structure, or in a daisy chain structure, and have a 1: 1 structure, a ring structure, and a daisy chain. The structure refers to a structure capable of bidirectional communication in a redundant path. Hereinafter, a method of operating the base station load optimization apparatus 112 in the connection structure between the base stations will be described in more detail. The base station load optimization apparatus 112 checks the traffic state between the first base station 110 and the second base station 120 connected in a 1: 1 structure, and the first base station 110 and the second base station connected in a 1: 1 structure. 120 reallocates radio resources to each other. The base station load optimization apparatus 112 may be configured as a base station and a remaining base station in each of the first base station 110, the second base station 120, and the third base station 130, which is a neighboring base station connected with the first base station, connected in a ring structure. The traffic state of the network is reconstructed, and the first base station 110, the second base station 120, and the third base station 130 connected in a ring structure are reallocated radio resources in a ring form based on the mother station. The base station load optimization device 112 includes a base station set as a mother station in a first base station 110, a second base station 120, and a third base station 130, which is a neighboring base station connected to the first base station 110, connected in a daisy chain structure. It checks the traffic conditions for each of the remaining base stations, and reallocates radio resources between the base station and the base station connected in a chain form at the first base station 110, the second base station 120, and the third base station 130 connected in a daisy chain structure. do.

On the other hand, the additional operation of the base station load optimization device 112 will be described further, the base station load optimization device 112 is connected to the remote 116 which is a repeater connected to each of the first base station 110 and the second base station 120. Check traffic conditions including radio resources. In addition, the process of transmitting the radio resources by the base station load optimization device 112, that is, the process of processing the switched signal in more detail, the base station load optimization device 112 is UDC (Up / Down Converter), DSP (Digital Signal Processor) and OCU (Outdoor Combiner Unit) may be provided. Here, referring to a process of processing a switched signal using each module provided with the base station load optimization device 112, a combiner may be used to form a plurality of signals separated from the UDC as a single output. After combining, the data is divided by the divider and transmitted again. The signal received from the UDC in the DSP is modulated / demodulated and transmitted. The OCU combines the received signal through the DSP and outputs the combined optical cable. Here, the UDC, DSP, and OCU will be described in more detail. In the UDC, a plurality of separated signals are combined in a combiner to form a single output and then divided again by a divider, and an amplified signal is input to the combiner. After re-joining, the out-of-band signal may be removed to be sent to the donor 114. In addition, the DSP bypasses a call message between the received mobile calls, or analogizes the voice message of the mobile subscriber using a demodulation function, thereby enabling voice exchange through a connection of a fixed subscriber concept. In addition, the OCU combines the received data of a plurality of intermediate frequency bands and outputs a single output to the second base station 120, the third base station 130, or the remote 116 through an optical cable. The donor 114 transmits the signal received from the first base station 110 to the remote 116, which is a kind of repeater, radiating the signal received through the donor 114 into the corresponding coverage.

2 is a block diagram schematically illustrating a base station load optimization apparatus according to an embodiment of the present invention.

Base station load optimization apparatus 112 according to an embodiment of the present invention is a state check unit 210, radio resource backup unit 212, radio resource allocation unit 220, switching unit 230 and transmission unit 240 It includes. In an embodiment of the present invention, the base station load optimization apparatus 112 includes only the status checker 210, the radio resource allocator 220, the radio resource backup unit 212, the switching unit 230, and the transmitter 240. Although it is described as including, but this is only illustrative of the technical spirit of one embodiment of the present invention, those skilled in the art to which one embodiment of the present invention belongs to the essential characteristics of one embodiment of the present invention Various modifications and variations to the components included in the base station load optimization apparatus 112 may be applied without departing from the scope of the present invention.

The status checker 210 checks the traffic states of the first base station 110, which is a base station to which the interworking base station is connected, and the second base station 120, which is a neighboring base station connected to the first base station 110. Meanwhile, according to an embodiment of the present invention, a connection structure of the first base station 110 and the second base station 120 or the third base station 130 may be connected in a paired 1: 1 structure, a ring structure, or a daisy chain structure. And, according to the operation of the status check unit 210 according to it, as follows. The state checking unit 210 checks the traffic state between the first base station 110 and the second base station 120 connected in a 1: 1 structure and connects the first base station 110 and the second base station 120 in a ring structure. The third base station 130 checks the traffic state for each of the base station and the remaining base station is set as the mother station. In addition, the status checker 210 checks the traffic state of each of the base station set as a mother station and the remaining base stations in the first base station 110, the second base station 120 and the third base station 130 connected in a daisy chain structure. . On the other hand, to further explain the additional operation of the status check unit 210, the status check unit 210 is a traffic state including a radio resource for the relay connected to each of the first base station 110 and the second base station 120 Check it.

The radio resource backup unit 212 backs up radio resources of each of the first base station 110 and the second base station 120 based on the result of the confirmation by the state confirming unit 210. In addition, the radio resource allocator 220 reallocates radio resources of each of the first base station 110 and the second base station 120 based on the result of the confirmation by the status confirmation unit 210. Here, specifically, how the radio resource allocator 220 reallocates radio resources of each of the first base station 110 and the second base station 120 based on the result of the confirmation by the state confirming unit 210 will be described in detail. The radio resource allocator 220 compares the check result of the status check unit 210 with a preset condition, and the base station lacking radio resources among the first base station 110 and the second base station 120 based on the comparison result. Recognized as a resource deficient base station, and a base station having surplus radio resources is recognized as a surplus resource base station so that the radio resources of the surplus resource base station are allocated to the resource deficient base station. Here, the preset condition refers to at least one condition of level sensing, scheduling, and base station failure.

The radio resource allocating unit 220 performs the following basic operations for recognizing a resource shortage base station and a surplus resource base station. That is, the radio resource allocator 220 recognizes that the radio resources are insufficient when the current output values of the first base station 110 and the second base station 120 are saturated, and the current output value is less than the preset value than the maximum output value. It is recognized as having a surplus radio resource.

The radio resource allocating unit 220 will be described with reference to an operation for recognizing a resource shortage base station and a surplus resource base station according to a preset condition. The radio resource allocator 220 detects a current output value of each of the first base station 110 and the second base station 120 to detect a level which is a preset condition, and then selects a base station whose current output value is less than a preset threshold as a resource shortage base station. After recognizing and recognizing a base station having a surplus output value as a surplus resource base station, the signal of the resource deficient base station is transferred to the surplus resource base station so that the surplus resource base station processes the signal of the resource deficient base station. In addition, the radio resource allocating unit 220 switches the signal of the insufficient resource base station to the surplus resource base station for a preset time when the preset time due to scheduling arrives for the processing of the scheduling which is a preset condition. In addition, the radio resource allocator 220 detects a current output value of each of the first base station 110 and the second base station 120 to process an operation for a base station failure, which is a preset condition, and then sets the current threshold to a preset failure threshold. If the base station is less than, the base station is recognized as a resource lacking base station, and the signal of the resource lacking base station is switched to the surplus resource base station.

Meanwhile, according to an embodiment of the present invention, a connection structure of the first base station 110 and the second base station 120 or the third base station 130 may be connected in a paired 1: 1 structure, a ring structure, or a daisy chain structure. The operation of the radio resource allocator 220 may be described as follows. The radio resource allocator 220 reassigns radio resources from the first base station 110 and the second base station 120 connected to each other in a 1: 1 structure, and the radio resource allocator 220 is connected to the ring structure. The first base station 110, the second base station 120, and the third base station 130 reassign radio resources in a ring form based on the mother station. In addition, the radio resource allocator 220 reallocates radio resources between a base station connected in a chain form in a first base station 110, a second base station 120, and a third base station 130 connected in a daisy chain structure. . The switching unit 230 switches radio resources in a path for transmitting radio resources to the reassigned base station according to the radio resource allocating unit 220.

The transmitter 240 transmits the radio resource received through the switching unit 230. The transmitter 240 includes a UDC, a DSP, and an OCU. The UDC combines multiple separate signals through a combiner to form a single output, which is then divided by the divider and sent to the DSP. The DSP modulates / demodulates the signal received from the UDC and transmits it to the OCU. The OCU combines the signals received through the DSP and outputs them to the connected optical cable. Here, the operation of the UCD, DSP, and OCU will be described in more detail. In the UDC, a plurality of separate signals are combined in a combiner to form a single output and then divided again by a divider and an amplified signal is inputted. After combining through the binner, the out-of-band signal may be removed to be sent to the donor 114. In addition, the DSP bypasses a call message between the received mobile calls, or analogizes the voice message of the mobile subscriber using a demodulation function, thereby enabling voice exchange through a connection of a fixed subscriber concept. In addition, the OCU combines the received data of a plurality of intermediate frequency bands and outputs a single output to the second base station 120, the third base station 130, or the remote 116 through an optical cable.

3 is a flowchart illustrating a base station load optimization method according to an embodiment of the present invention.

The base station load optimization apparatus 112 checks the traffic conditions of the first base station 110, which is the base station to which the interworking base station, and the second base station 120 or the third base station 130, which is the neighboring base station connected to the first base station 110 ( S310). In step S310, the relationship between the base station load optimization device 112 and the first base station 110 is that the base station load optimization device 112 is mounted in the first base station 110 to directly interwork with the first base station 110. The relationship between the base station load optimization device 112, the second base station 120, and the third base station 130 is a base station load optimization device 112 is a second base station on which another base station load optimization device is mounted ( 120 or the third base station 130.

The base station load optimization apparatus 112 backs up radio resources of each of the first base station 110, the second base station 120, or the third base station 130 based on the result of checking the traffic state (S312). To describe in more detail how the base station load optimization device 112 backs up the radio resources based on the result of checking the traffic state of each base station in step S312, the base station load optimization device 112 determines the traffic state check result. Compared to a preset condition, and based on the comparison result, the first base station 110, the second base station 120 and the third base station 130 is recognized as a problem base station that needs to be checked or a warning, failure or error occurs, After recognizing a normal base station as a normal base station and backing up the radio resources of the problem base station to the normal base station, when the problem base station operates as a normal base station, it performs the function of transmitting the backed up radio resources to the base station. Here, when the base station load optimization apparatus 112 checks the traffic state, if the output value of the base station is less than the preset threshold, the base station may be recognized as a problem base station that needs to be checked or a warning, failure or error occurs.

The base station load optimization apparatus 112 reallocates radio resources of each of the first base station 110, the second base station 120, or the third base station 130 based on the result of checking the traffic state (S320). On the other hand, if the base station load optimization device 112 will be described how to reallocate the radio resources based on the result of confirming the traffic state in step S320, the base station load optimization device 112 is based on a predetermined condition After the base station 110 and the second base station 120 and the base station that lacks the radio resources based on the comparison result is recognized as a resource shortage base station, and the base station having the surplus radio resources is recognized as a surplus resource base station The radio resources of the surplus resource base station are allocated to the resource lack base station. Here, the meaning that the radio resources of the surplus resource base station is allocated to the insufficient resource base station means that the signal generated by the insufficient resource base station cannot be processed because the processing state of the signal generated in the resource insufficient base station is saturated, and thus, the resource insufficient base station This means that some of the signals generated in S are transferred to the redundant resource base station.

Referring to the manner in which the base station load optimization device 112 recognizes the resource shortage base station and the surplus resource base station in step S320, the base station load optimization device 112 is the current of the first base station 110 and the second base station 120 If the output value is saturated, the radio resource is recognized as insufficient. If the current output value is less than the preset value than the maximum output value, it is recognized as having excess radio resources.

In addition, referring to the preset condition used in the base station load optimization apparatus 112 in step S320, the preset condition may be at least one of level sensing, scheduling, and a failure of the base station. Meanwhile, hereinafter, the base station load optimization apparatus 112 will be described for the operation processing in the case of at least one or more of the level detection, scheduling and the failure of the base station which is a preset condition. The base station load optimization device 112 detects a current output value of each of the first base station 110 and the second base station 120 to detect a level among preset conditions, and then selects a base station whose current output value is less than a preset threshold as a resource deficient base station. After recognizing and recognizing a base station having a surplus output value as a surplus resource base station, the signal of the resource deficient base station is transferred to the surplus resource base station so that the surplus resource base station processes the signal of the resource deficient base station. The base station load optimization apparatus 112 transfers a signal of the preset resource shortage base station to a surplus resource base station for a preset time when a preset time due to scheduling arrives for the processing of scheduling among preset conditions. When the base station load optimization device 112 detects a current output value of each of the first base station 110 and the second base station 120 for processing when a failure occurs among preset conditions, the current output value is less than a preset failure threshold. Recognizes the base station as a resource deficient base station, and transfers the signal of the resource deficient base station to the surplus resource base station.

The base station load optimization apparatus 112 switches the radio resources with a path for delivering radio resources to the reassigned base station (S330). The base station load optimization apparatus 112 transmits radio resources to the reassigned base station (S340). That is, the base station load optimization device 112 causes the signal of the insufficient resource base station to be switched to the surplus resource base station.

Although it is described in FIG. 3 that steps S310 to S340 are sequentially executed, this is merely illustrative of the technical idea of an embodiment of the present invention. It is to be understood that the technical knowledge in the technical field to which an embodiment of the present invention belongs Those skilled in the art will appreciate that various modifications and adaptations may be made to those skilled in the art without departing from the essential characteristics of one embodiment of the present invention by changing the order described in Figure 3 or by executing one or more of steps S310 through S340 in parallel And therefore, Fig. 3 is not limited to the time-series order.

As described above, the base station load optimization method according to an embodiment of the present invention described in FIG. 3 may be implemented in a program and recorded in a computer-readable recording medium. A computer-readable recording medium having recorded thereon a program for implementing a base station load optimization method according to an embodiment of the present invention includes all kinds of recording devices storing data that can be read by a computer system. Examples of such computer-readable recording media include ROM, RAM, CD-ROM, magnetic tape, floppy disk, optical data storage, etc., and also implemented in the form of a carrier wave (e.g., transmission over the Internet) . The computer readable recording medium may also be distributed over a networked computer system so that computer readable code is stored and executed in a distributed manner. In addition, functional programs, code, and code segments for implementing an embodiment of the present invention may be easily inferred by programmers skilled in the art to which an embodiment of the present invention belongs.

4 is a block diagram schematically illustrating a radio resource backup system having a paired 1: 1 structure according to an embodiment of the present invention.

The third base station 130 shown in FIG. 4 refers to a device that performs a location registration function, a function of allocating a radio channel, and various functions required for processing a radio signal such as a handoff. In more detail with respect to the third base station 130, the third base station 130 may be configured to include a base station transmitter (not shown) and a base station controller (not shown), a concept that supports both synchronous and asynchronous Says the device. For example, if the third base station 130 supports synchronous, the base station transmitter may be a BTS, the base station controller may be a BSC, and if the third base station 130 supports asynchronous, the base station transmitter may be Node. -B, and the base station controller can be an RNC. In more detail with respect to the base station transmitter and the base station controller included in the third base station 130, the base station transmitter transmits and receives signals to and from the remote 116 or the terminal through the traffic channel of the signal channel, the base station controller is a base station transmitter Control by assigning and releasing radio channels to the terminal, controlling the transmit power of the terminal and base station transmitters, determining soft handoff and hard handoff between cells, transcoding and vocoding, GPS clock distribution, baseband signal processing, wired and wireless conversion, and wireless signals Send and receive.

The third base station 130 according to an embodiment of the present invention refers to a base station supporting at least one or more of CDMA, WCMA, WiBro, and LTE, but as shown in FIG. Since 3 is not mounted, the third base station 130 is in a state in which radio resources cannot be reallocated with the first base station 110 and the second base station 120. More specifically, as illustrated in FIG. 4, although the first base station 110, the second base station 120, and the third base station 130 are connected, the base station load is connected to the third base station 130. Since the optimizer 112 is not mounted, the third base station 130 cannot communicate with the first base station 110 and the second base station 120 through the base station load optimization device 112. That is, this structure is connected to the first base station 110 and the second base station 120 in a paired 1: 1 structure, the 1: 1 structure shown in Figure 4 is a redundant path and the first base station 110 Refers to a structure capable of bidirectional communication between the second base station 120. Hereinafter, the 1: 1 connection structure between base stations will be described in more detail. The base station load optimization apparatus 112 checks the traffic state between the first base station 110 and the second base station 120 connected in a 1: 1 structure. In addition, the first base station 110 and the second base station 120 connected in a 1: 1 structure reallocate radio resources to each other.

5 is a block diagram schematically illustrating a radio resource backup system having a ring structure according to an embodiment of the present invention.

As shown in FIG. 5, since the base station load optimization apparatus 112 is mounted on the third base station 130, the third base station 130 may provide radio resources with the first base station 110 and the second base station 120. You can reassign. More specifically, as shown in FIG. 5, the first base station 110, the second base station 120, and the third base station 130 are connected in a ring structure, and the first base station 110 is connected to the first base station 110. Since the base station load optimization device 112 is mounted on both the second base station 120 and the third base station 130, the first base station 110, the second base station 120, and the third base station 130 are the base station. It is a state which can communicate with each other through the load optimization apparatus 112.

That is, this structure is the first base station 110, the second base station 120 and the third base station 130 is connected in a ring structure, the ring structure shown in Figure 5 is a redundant path to the first base station 110, Refers to a structure capable of bidirectional communication between the second base station 120 and the third base station 130. Hereinafter, the ring structure between base stations will be described in more detail. The base station load optimization device 112 includes a first base station 110 connected with a ring structure, a second base station 120, and a third base station connected to the first base station. The base station 130 checks the traffic state of each of the base station and the other base station is set as the base station, the first base station 110, the second base station 120 and the third base station 130 connected in a ring structure based on the base station Reallocates radio resources in the form of rings. In this case, any one of the first base station 110, the second base station 120 and the third base station 130 may be set as a mother station.

6 is a block diagram schematically illustrating a radio resource backup system having a daisy chain structure according to an embodiment of the present invention.

As shown in FIG. 6, since the base station load optimization device 112 is mounted on the first base station 110, the second base station 120, and the third base station 130, the first base station 110 and the second base station. The 120 and the third base station 130 are capable of reallocating radio resources in a daisy chain form. More specifically, as shown in FIG. 5, the first base station 110, the second base station 120, and the third base station 130 are connected in a daisy chain structure, and the first base station 110 is connected. ), The second base station 120 and the third base station 130 are all equipped with the base station load optimization device 112, so that the first base station 110, the second base station 120 and the third base station 130 The base station load optimization device 112 can communicate in a daisy chain structure.

That is, this structure is the first base station 110, the second base station 120 and the third base station 130 is connected in a daisy chain structure, the daisy chain structure shown in Figure 6 is a structure capable of bidirectional communication in a redundant path Say. Hereinafter, the daisy chain structure between base stations will be described in more detail. The base station load optimization device 112 is connected to the first base station 110, the second base station 120, and the first base station 110 connected in a daisy chain structure. The first base station 110, the second base station 120, and the third base station 130 are connected to each other by checking the traffic state of the base station set as the mother station and the remaining base stations in the neighboring base station, the third base station 130; ) Reallocates radio resources between the base station and the base stations in the chain.

7 is an exemplary view for explaining an algorithm when switching signals by scheduling according to an embodiment of the present invention.

As illustrated in FIG. 7, the base station load optimization apparatus 112 transmits a signal of the preset resource shortage base station to a surplus resource base station when a preset time due to scheduling for processing of scheduling has arrived. Change over for the set time. For example, when it is assumed that the preset time by the preset scheduling is '20 seconds', the base station load optimization apparatus 112, when the base station signal change command by the preset scheduling is input, the second base station 120 It can be seen that the output value of the first base station 110 is 3 dB when the output value of) is -20 dB, and the output value of the first base station 110 is 7 dB when the output value of the second base station 120 is -10 dB. It can be seen that the output value of the first base station 110 is 10dB when the output value of the second base station 120 is -7 dB, '20 seconds when the output value of the second base station 120 is -3 dB 'Elapses, and it can be seen that the signal of the first base station is switched.

8 is an exemplary view for explaining an algorithm when signal switching due to a base station failure according to an embodiment of the present invention.

As shown in FIG. 8, the base station load optimization apparatus 112 detects a current output value of each of the first base station 110 and the second base station 120 for processing when a failure occurs among preset conditions, and then When the output value is less than the predetermined failure threshold, the base station is recognized as a resource lacking base station, and the signal of the resource lacking base station is transferred to the surplus resource base station. For example, when the output value of the first base station 110 falls below a preset level (30 dB) after about 2 seconds has elapsed, the base station load optimization apparatus 112 may fail the first base station 110. It is considered to have occurred, and the signal of the first base station 110 is transferred to the second base station 120 so that the second base station 120 processes the signal of the first base station 110. That is, as shown in FIG. 8, it can be seen that the output value of the second base station 120 becomes equal to the output value of the first base station 110 after the signal of the first base station 110 is switched.

The foregoing description is merely illustrative of the technical idea of the present invention, and various changes and modifications may be made by those skilled in the art without departing from the essential characteristics of the present invention. Therefore, the embodiments disclosed in the present invention are intended to illustrate rather than limit the scope of the present invention, and the scope of the technical idea of the present invention is not limited by these embodiments. The protection scope of the present invention should be interpreted by the following claims, and all technical ideas within the equivalent scope should be interpreted as being included in the scope of the present invention.

110: first base station 112: base station load optimization device
114: donor 116: remote
120: second base station 130: third base station
210: status check unit 212: radio resource backup unit
220: radio resource allocation unit 230: switching unit
240: transmission unit

Claims (22)

A state checking unit for checking a traffic state of a first base station which is an interworking base station and a second base station which is a neighboring base station connected with the first base station; And
A radio resource backup unit for backing up a radio resource of each of the first base station and the second base station based on the result of checking the state check unit
Base station load optimization apparatus comprising a. The method of claim 1,
A radio resource allocating unit for reallocating the radio resources of each of the first base station and the second base station based on a result of checking the state checking unit;
A switching unit for switching the radio resources in a path for delivering the radio resources to the reassigned base station according to the radio resource allocation unit; And
Transmitter for transmitting the radio resource
The base station load optimization apparatus further comprises. The method of claim 2,
The radio resource allocation unit,
The check result is compared with a preset condition, and based on the comparison result, a base station having insufficient radio resources among the first base station and the second base station is recognized as an insufficient resource base station, and a base station having surplus radio resources is identified as a surplus resource. And a base station load optimization apparatus for recognizing a base station so that radio resources of the surplus resource base station are allocated to the resource deficient base station. The method of claim 3, wherein
The radio resource allocation unit,
Recognizing that the radio resource is insufficient when the current output value of the first base station and the second base station is saturated, and if the current output value is less than the predetermined value than the maximum output value to recognize the excess radio resources Base station load optimization device, characterized in that. The method of claim 3, wherein
The preset condition is,
A base station load optimization apparatus, characterized in that at least one condition of level detection, scheduling (scheduling) and the failure of the base station. The method of claim 5, wherein
The radio resource allocation unit,
After detecting the current output value of each of the first base station and the second base station to detect the level, the base station having the current output value less than a preset threshold is recognized as the resource lacking base station, and the base station having the excess output value is determined. And recognizing the surplus resource base station, and switching the signal of the insufficient resource base station to the surplus resource base station so that the surplus resource base station processes the signal of the insufficient resource base station. The method of claim 5, wherein
The radio resource allocation unit,
And when the preset time due to the scheduling arrives for the processing of the scheduling, transferring the preset signal of the insufficient resource base station to the surplus resource base station for the preset time. The method according to claim 6,
The radio resource allocation unit,
After detecting the current output value of each of the first base station and the second base station, the base station when the current output value is less than a preset failure threshold is recognized as the low resource base station, and the signal of the low resource base station is transferred to the surplus resource base station. Base station load optimization device, characterized in that for switching. The method of claim 2,
The first base station and the second base station,
The base station load optimization device, characterized in that connected in a pair 1: 1 structure, ring (ring) structure, or daisy chain (Daisy Chain) structure. The method of claim 9,
The 1: 1 structure, the ring structure and the daisy chain structure is a base station load optimization apparatus, characterized in that the structure capable of bidirectional communication in a redundant path. The method of claim 9,
The status check unit checks the traffic state between the first base station and the second base station connected in the 1: 1 structure,
And the radio resource allocation unit re-allocates the radio resources between the first base station and the second base station connected in the 1: 1 structure. The method of claim 9,
The state checking unit checks the traffic state of each of the base station set as a mother station and the remaining base stations in the first base station, the second base station and the third base station connected to the first base station connected in the ring structure,
And the radio resource allocating unit re-allocates the radio resources in a ring form based on the mother station in the first base station, the second base station, and the third base station connected in the ring structure. The method of claim 9,
The status checking unit checks the traffic state of each of the base station set as a mother station and the remaining base stations in the first base station, the second base station connected in the daisy chain structure, and the third base station which is a neighboring base station connected with the first base station.
And the radio resource allocating unit reallocates the radio resources between the first base station, the second base station, and the third base station connected in the daisy chain structure, between the base stations connected in a chain form with the mother station. The method of claim 1,
The first base station and the second base station,
A base station load optimization apparatus for supporting at least one or more of Code Division Multiple Access (CDMA), Wideband Code Division Multiple Access (WCMA), Wireless Broadband Internet (WiBro), and Long Term Evolution (LTE). The method of claim 1,
The state check unit,
And identifying the traffic state including radio resources for a repeater connected to each of the first base station and the second base station. The method of claim 2,
Wherein the transmission unit comprises:
An UDC (Up / Down Converter) which combines a plurality of signals separated by a combiner to form a single output and then divides the signals by a divider;
A digital signal processor (DSP) for modulating / demodulating and receiving a signal received from the UDC; And
OCU (Outdoor Combiner Unit) which combines the signal received through the DSP and outputs it with the connected optical cable
Base station load optimization apparatus comprising a. In the method of backing up radio resources between base stations,
Checking a traffic state of a first base station which is an interworking base station and a second base station which is a neighboring base station connected with the first base station; And
A radio resource backup step of backing up the radio resources of each of the first base station and the second base station based on the result of the check of the state check unit
Base station load optimization method comprising a. The method of claim 17,
A radio resource allocating step of allocating radio resources of each of the first base station and the second base station based on a result of checking the status check unit;
A switching step of switching the radio resource in a path for delivering the radio resource to a reassigned base station according to the radio resource allocation unit; And
A transmission step of transmitting the radio resource
The base station load optimization method further comprises. The method of claim 18,
The radio resource allocation step,
The check result is compared with a preset condition, and based on the comparison result, a base station having insufficient radio resources among the first base station and the second base station is recognized as an insufficient resource base station, and a base station having surplus radio resources is identified as a surplus resource. And recognizing a base station so that radio resources of the surplus resource base station are allocated to the resource deficient base station. The method of claim 18,
The radio resource allocation step,
After detecting a current output value of each of the first base station and the second base station, a base station having a current output value less than a preset threshold is recognized as the insufficient resource base station, and a base station having a surplus output value is recognized as the surplus resource base station. And switching the signal of the insufficient resource base station to the surplus resource base station so that the surplus resource base station processes the signal of the insufficient resource base station. The method of claim 18,
The radio resource allocation step,
And switching a signal of a predetermined resource shortage base station to a predetermined surplus resource base station for the predetermined time when the predetermined time due to scheduling arrives. The method of claim 18,
The radio resource allocation step,
After detecting the current output value of each of the first base station and the second base station, if the current output value is less than a preset failure threshold, the base station is recognized as an insufficient resource base station, and the signal of the insufficient resource base station is surplus having excess radio resources. A base station load optimization method comprising the step of switching to a resource base station.

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