JP2004180056A - Radio base station - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a radio base station which can easily be expanded and effectively control call processes in a plurality of radio base stations. <P>SOLUTION: When the radio base station is connected with a radio network control apparatus 2 via a master transmission path interface 101A to serve as a master radio base station 10A, a call process control unit 102A of the master radio base station 10A controls call processes of the master radio base station 10A and also controls call processes of a slave radio base station 10B via a slave transmission path interface 108A. When the radio base station is connected to the master radio base station 10A via a master transmission path interface means 101B to serve as the slave radio base station 10B, a call process control unit 102B of the slave radio base station 10B does not control call processes of the slave radio base station 10B. <P>COPYRIGHT: (C)2004,JPO

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a wireless base station that transmits and receives data in wired communication of a mobile communication system, and particularly to a wireless base station that can cascade-connect wireless base stations.
[0002]
[Prior art]
A case in which a conventional wireless base station and a wireless network control device are connected using an ATM (Asynchronous Transfer Mode) transmission path in wired communication of a mobile communication system will be described with reference to FIG. As shown in FIG. 7, the mobile communication system includes a plurality of wireless base stations 1, a wireless network control device 2, a switch 3, a network (wired network) 4, and a plurality of mobile stations 5. The radio base station 1 transmits and receives radio signals to and from the mobile station 5 using a radio transmission path, and transmits and receives ATM cells to and from the radio network controller 2 using an ATM transmission path. The contents of the ATM cell include a user signal and a control signal. The user signal is a signal transmitted and received between the radio network controller 2 and the mobile station 5 via the radio base station 1, and the control signal is a control signal given to the radio base station 1 by the radio network controller 2. It is. The wireless network control device 2 is connected to the wired network 4 via the exchange 3 and is also connected to a plurality of wireless base stations 1 and controls the connected wireless base stations 1.
[0003]
The conventional radio base station 1 is installed according to the number of ports of the ATM transmission line prepared in the radio network controller 2. In the example shown in FIG. 7, two ATM transmission path ports are connected to the radio network controller 2, and two radio base stations 1 are installed corresponding to the two ATM transmission paths.
[0004]
Here, the configuration of the conventional wireless base station 1 will be described with reference to FIG. As shown in FIG. 8, a conventional radio base station 1 includes a transmission line interface unit 11, a call processing control unit 12, a maintenance monitoring control unit 13, a transmission line signal switching unit 14, a radio transmission / reception unit 15, a radio amplification unit 16, It comprises a storage unit 17. The transmission line interface unit 11 is connected to the wireless network control device 2 via an ATM transmission line.
[0005]
Next, the operation of the conventional radio base station 1 will be described with reference to FIG. The transmission line interface unit 11 terminates the ATM transmission line from the radio network controller 2. The downlink ATM cells extracted here are transmitted to the transmission line signal switching unit 14.
[0006]
The transmission line signal switching unit 14 includes an input / output port connected to the transmission line interface unit 11, an input / output port connected to the call processing control unit 12, an input / output port connected to the maintenance monitoring control unit 13, a radio transmission / reception unit 15 is provided. The transmission line signal switching unit 14 is usually composed of an ATM switch, and separates and transfers the multiplexed ATM cells. For example, the call processing control signal among the control signals is transferred to the call processing control unit 12, the maintenance monitoring control signal among the control signals is transferred to the maintenance monitoring control unit 13, and the user signal is transferred to the wireless transmitting and receiving unit 15. Here, the call processing control signal is a signal for the wireless network control device 2 to control the call processing of the wireless base station. Call processing refers to location registration, signal transmission, reception, signal switching of control signals related to channel switching and call termination, frequency allocation, and line selection. The maintenance monitoring control signal is a signal for the wireless network control device 2 to perform control related to maintenance monitoring of the wireless base station. The transmission line signal switching unit 14 multiplexes the uplink ATM cells received from each processing unit and transfers the multiplexed ATM cells to the transmission line interface unit 11. Further, the transmission path signal switching unit 14 converts the signal limited in the radio base station 1 from the call processing control unit 12 or the maintenance monitoring control unit 13 to the radio transmission / reception unit 15 and from the radio transmission / reception unit 15 to the call processing control unit. It is also possible to transfer to the maintenance monitoring control unit 12 or 12.
[0007]
Here, an example of the routing setting of the transmission path signal switching unit 14 will be described with reference to FIG. FIG. 9 is a diagram illustrating an example of a routing setting of a transmission path signal switching unit in a conventional wireless base station. Here, the input port, the header information of the ATM cell, and the output port are shown in association with each other. Here, the input port indicates a port to which an ATM cell is actually input among input / output ports. The output port represents a port to which an ATM cell is actually output among input / output ports. The header information of the ATM cell is information indicating the destination of the ATM cell and includes VPI (Virtual Path ID) and VCI (Virtual Channel ID).
[0008]
For example, if the header information of the ATM cell input from the input port of the transmission line interface unit 11 is “VPI = 0, VCI = 20”, the transmission line signal switching unit 14 Transfer to Conversely, similarly, if the header information of the ATM cell input from the input port of the maintenance monitoring control unit 13 is "VPI = 1, VCI = 20", the transmission line signal switching unit 14 transmits the ATM cell. Route interface unit 11.
[0009]
The call processing control unit 12 controls the call processing of the radio base station 1 according to the call processing control signal. The maintenance monitoring control unit 13 monitors the state in the wireless base station and controls each processing unit of the wireless base station 1 according to the maintenance monitoring control signal. When a state change is detected in the wireless base station 1, the maintenance monitoring control unit 13 notifies the wireless network control device 2 of the state monitoring information via the transmission line interface unit 11. The storage unit 17 stores an execution program of the wireless base station 1, setting information, and device configuration information. Here, the setting information is initial setting data necessary for starting the apparatus. The device configuration information is data indicating the hardware configuration of the device.
[0010]
Further, the radio transmission / reception unit 15 extracts a user signal from the ATM cell transferred from the transmission path signal switching unit 14 and outputs a coded and modulated radio frequency signal to the radio amplification unit 16. The wireless amplifier 16 outputs the amplified wireless frequency signal from the antenna to the outside. On the other hand, when a user signal is transmitted from the external mobile station 5 to the antenna of the wireless base station 1, the wireless amplifying unit 16 outputs the wireless frequency signal received and amplified by the antenna to the wireless transmitting and receiving unit 15. The radio transmission / reception unit 15 demodulates, decodes, and decomposes the radio frequency signal, generates an ATM cell from the obtained user signal, and outputs the ATM cell to the transmission line signal switching unit 14.
[0011]
Next, an operation in which the conventional radio base station 1 synchronizes its own system clock with the system clock of the radio network controller 2 will be described. The transmission line interface unit 11 of the radio base station 1 may have a function of synchronizing with the system clock of the radio network controller 2 in some cases. The transmission line interface unit 11 generates a system clock using a PLL circuit or the like (not shown) based on a clock extracted from a signal received from the radio network controller 2, and thereby generates a system clock of the radio network controller 2. Can be synchronized. The above is the operation of the conventional radio base station 1.
[0012]
[Problems to be solved by the invention]
Here, it is assumed that the radio channels used during the operation run short. When a new wireless channel is to be newly added using the conventional wireless base station 1, the new wireless base station 1 must be directly connected to the wireless network control device 2, which causes a shortage of resources of the wireless network control device 2. There was a problem. Further, when the new radio base station 1 is directly connected to the radio network controller 2, the user needs to make a line contract between the new radio base station 1 and the radio network controller 2, and the line usage fee is also reduced. For this reason, there is a problem that the cost is increased. Further, a plurality of wireless base stations directly connected to the wireless network control device 2 need to individually control the call processing.
[0013]
The present invention has been made in view of the above-described problems, and provides a wireless base station that can easily add wireless base stations and efficiently control call processing of a plurality of wireless base stations. The purpose is to do.
[0014]
[Means for Solving the Problems]
In order to solve the above-mentioned problems, the present invention provides a first transmission path interface unit for transmitting / receiving data to / from a radio network controller or a higher-level radio base station, and transmitting / receiving data to / from a lower-level radio base station. A second transmission path interface means, and a call processing control means for performing control relating to call processing, wherein the radio base station communicates with the higher-level radio base station via the first transmission path interface means. When being set as a lower radio base station by being connected, the call processing control means of the higher radio base station controls call processing of the lower radio base station via the second transmission path interface. It is characterized by performing.
[0015]
In the embodiment, the first transmission line interface means for transmitting and receiving data to and from the radio network controller or the upper radio base station, and the second transmission interface for transmitting and receiving data to and from the lower radio base station. Channel interface means, a call processing control means for performing control related to call processing, and a radio transmission / reception means for transmitting / receiving data to / from a mobile station via a radio transmission path. When the radio network controller is connected to the radio network controller via one transmission path interface means and becomes a higher radio base station, the call processing control means of the higher radio base station relates to the call processing of the higher radio base station. Control and call control of a lower-level radio base station via the second transmission path interface, and the radio base station communicates with the first transmission path interface When the radio base station is connected to an upper radio base station via a stage and becomes a lower radio base station, the call processing control means of the lower radio base station does not perform control related to call processing. A base station is disclosed.
[0016]
According to such a configuration, it is possible to easily add a radio base station without adding resources of a radio network controller or making a new line contract, and to control call processing of the added lower radio base station. Is performed by a higher-level wireless base station, so that efficient control can be performed. In this embodiment, the first transmission path interface means is the upper transmission path interface unit 101, the second transmission path interface is the lower transmission path interface unit 108, and the call processing control means is It refers to the call processing control unit 102, and the wireless transmission / reception unit refers to the wireless transmission / reception unit 15.
[0017]
Further, in the radio base station of the present invention, it is possible to provide a storage means for holding information for identifying an upper radio base station or a lower radio base station. , The radio base station can identify the upper radio base station or the lower radio base station. If the result of the identification is a higher-level radio base station, the call processing control means controls the call processing between the local station and the lower-level radio base station. Note that the storage unit in the present embodiment is the storage unit 107 or the master / slave identification unit 109.
[0018]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 is a block diagram showing an example of a connection form between a radio base station and a radio network controller according to the present invention. 1, the same reference numerals as those in FIG. 7 denote the same or corresponding components as those shown in FIG. 7, and a description thereof will be omitted. When it is desired to newly add a wireless channel using the wireless base station of the present invention, as shown in FIG. 1, the wireless base station is directly connected to the wireless base station using an ATM transmission line. Hereinafter, the radio base station connected to the radio network controller 2 via the ATM transmission path is referred to as a master radio base station 10A, and the radio base station connected to the master radio base station 10A via the ATM transmission path is referred to as a slave radio station. Called base station 10B.
[0019]
Next, the configuration of the wireless base station of the present invention will be described with reference to FIG. FIG. 2 is a block diagram illustrating an example of a configuration of the wireless base station according to the present invention. 2, the same reference numerals as those in FIG. 8 denote the same or corresponding components as those shown in FIG. 8, and a description thereof will be omitted. As shown in FIG. 2, the radio base station 10 of the present invention newly includes a lower transmission path interface unit 108 and a master / slave identification unit 109. Further, the radio base station of the present invention includes an upper-level transmission line interface unit 101 instead of the transmission line interface unit 11, a call processing control unit 102 instead of the call processing control unit 12, and a maintenance monitoring control unit 13 instead of the maintenance monitoring control unit 13. In addition, a maintenance monitoring control unit 103 is provided, a transmission line signal switching unit 104 is provided instead of the transmission line signal switching unit 14, and a storage unit 107 is provided instead of the storage unit 17. The upper transmission path interface unit 101 is connected to a radio network controller or a master radio base station via an ATM transmission path, and the lower transmission path interface unit 108 is connected to a slave radio base station via an ATM transmission path. Or it is not connected to the outside.
[0020]
Here, a connection form between the master wireless base station 10A and the slave wireless base station 10B shown in FIG. 1 will be described with reference to FIG. As shown in FIG. 3, the master wireless base station 10A and the slave wireless base station 10B each have the same configuration as the wireless base station 10 shown in FIG. That is, the master radio base station 10A includes the upper transmission line interface unit 101A, the call processing control unit 102A, the maintenance monitoring control unit 103A, the transmission line signal switching unit 104A, the radio transmission / reception unit 15A, the radio amplification unit 16A, the storage unit 107A, It comprises a transmission line interface unit 108A and a master / slave identification unit 109A. Similarly, the slave radio base station 10B includes an upper transmission path interface section 101B, a call processing control section 102B, a maintenance monitoring control section 103B, a transmission path signal switching section 104B, a radio transmission / reception section 15B, a radio amplification section 16B, and a storage section 107B. It comprises a lower transmission path interface unit 108B and a master / slave identification unit 109B.
[0021]
In the present embodiment, the upper transmission line interface unit 101A of the master radio base station 10A is connected to the radio network controller 2 via an ATM transmission line. The lower transmission line interface unit 108A of the master wireless base station 10A is connected to the upper transmission line interface unit 101B of the slave wireless base station 10B via an ATM transmission line. The lower transmission path interface unit 108B of the slave radio base station 10B is not connected to the outside and is not used.
[0022]
Hereinafter, the functions of master wireless base station 10A and slave wireless base station 10B in the present embodiment will be described with reference to FIG. FIG. 4 is a diagram showing a function comparison between the master wireless base station and the slave wireless base stations.
[0023]
First, the storage units 107A and 107B will be described. As shown in FIG. 4, when the wireless base station is started up, the storage unit 107A stores master identification information, a master execution program, setting information, and device configuration information. The storage unit 107B stores slave identification information and a slave execution program. The master identification information is information indicating a master wireless base station, and the slave identification information is information indicating a slave wireless base station. Further, the master execution program is an execution program of the master radio base station, and the slave execution program is an execution program of the slave radio base station.
[0024]
Next, the operations of the maintenance monitoring control units 103A and 103B and the call processing control units 102A and 102B when starting up the wireless base station will be described using the flow of FIG. This flow starts when the power is turned on. First, the maintenance monitoring control unit 103A initializes a minimum necessary master radio base station 10A for identifying a master radio base station or a slave radio base station at the time of startup. Similarly, the maintenance monitoring control unit 103B initializes the master radio base station 10B (S1).
[0025]
Next, the maintenance monitoring control unit 103A reads out the master identification information or the slave identification information stored in the storage unit 107A, or checks the status of the DIP-SW in the master / slave identification unit 109A, and thereby checks the status of its own station. Is determined as a master wireless base station. Similarly, the maintenance monitoring control unit 103B uses the storage unit 107B or the master / slave identification unit 109B to determine whether or not the own station is the master wireless base station (S2).
[0026]
Here, when the own station is determined to be a slave wireless base station (S2, N), the maintenance monitoring controller 103B performs hardware initialization for the slave (S11). The hardware initialization for the slave means that the call processing control unit 102A of the master radio base station 10A controls / manages the call processing of the slave radio base station 10B without starting the call processing control unit 102B. In the station 10B, each processing unit other than the call processing control unit 102B is activated.
[0027]
Next, the maintenance monitoring control unit 103B determines whether it is necessary to download the slave execution program (S12). If the version of the slave execution program is not a regular version due to an illegal operation and it is necessary to download the slave execution program (S12, Y), the slave execution program stored in the storage unit 107B is downloaded ( S13) After the completion, the process proceeds to S14. When it is not necessary to download the slave execution program (S12, N), the state transitions to a state of waiting for reception of the setting information and the device configuration information (S14).
[0028]
On the other hand, when it is determined that the own station is the master wireless base station (S2, Y), the maintenance monitoring controller 103A performs hardware initialization for the master (S3). The hardware initialization for the master is to activate each processing unit in the master radio base station 10A. The activated call processing control unit 102A sets the routing of the transmission line signal switching units 104A and 104B. The routing setting will be described later with reference to FIG.
[0029]
Next, the maintenance monitoring controller 103A determines whether it is necessary to download the master execution program (S4). When it is necessary to download the master execution program (S4, Y), the master execution program stored in the storage unit 107A is downloaded (S5), and after completion, the process proceeds to step S6. When it is not necessary to download the master execution program (S4, N), the setting information stored in the storage unit 107A is read, and thereafter, the device configuration information is read (S6).
[0030]
After reading the setting information and the device configuration information, the maintenance monitoring control unit 103A determines whether there is a cascade-connected wireless base station in its own station (S7). If there are no cascade-connected wireless base stations (S7, N), the process proceeds to step S9. In the present embodiment, since there are cascade-connected wireless base stations (S7, Y), the read setting information and device configuration information are distributed to the maintenance monitoring control unit 103B (S8), and the state transits to the operation state (S9). Then, this flow ends. On the other hand, when receiving the setting information and the device configuration information, the maintenance monitoring control unit 103B that has been in the waiting state for the setting information and the device configuration information stores the setting information and the device configuration information in the storage unit 107B (S15). (S9), and the flow ends.
[0031]
As shown in FIG. 4, the operation state of the maintenance monitoring control unit 103A of the master wireless base station 10A is a state of waiting for a maintenance monitoring control signal from the wireless network control device 2, and the master wireless base station 10A and the slave wireless This means starting the state monitoring and state control of the base station 10B. When a state change is detected in the master wireless base station 10A, the maintenance monitoring control unit 103A notifies the wireless network control device 2 of the state monitoring information via the upper transmission line interface unit 101B. As shown in FIG. 4, the operation state of the maintenance monitoring control unit 103B of the slave wireless base station 10B is a state of waiting for a maintenance monitoring control signal from the master wireless base station 10A, and the operation state of the slave wireless base station 10B. Starts status monitoring. Here, when the state change is detected in the slave radio base station 10B, the maintenance monitoring control unit 103B notifies the maintenance monitoring control unit 103A of the state monitoring information via the upper transmission line interface unit 101B. By notifying the radio network controller 2 of this status monitoring information via the upper transmission line interface unit 101B, the maintenance monitoring control unit 103A performs status monitoring and status control of the slave radio base station 10B.
[0032]
The operation state in the call processing control unit 102A of the master radio base station 10A is, as shown in FIG. 4, a wait state for a call processing control signal from the radio network controller 2, and according to the received call processing control signal, It performs wireless channel management, setting and release of wireless channels, call processing monitoring and call processing control, and various measurements in the master wireless base station 10A and the slave wireless base station 10B. Further, since the control regarding the call processing of the slave radio base station 10B is performed by the call processing control unit 102A of the master radio base station 10A, the call processing control unit 102B of the slave radio base station 10B is not used.
[0033]
Next, the operation of the transmission path signal switching units 104A and 104B will be described. Each of the transmission line signal switching units 104A and 104B includes an input / output port connected to the upper transmission line interface units 101A and 101B, an input / output port connected to the call processing control units 102A and 102B, and a maintenance monitoring control unit 103A and 103B. , An input / output port connected to the wireless transmission / reception units 15A, 15B, and an input / output port connected to the lower transmission path interface units 108A, 108B. Each of the transmission line signal switching units 104A and 104B has a function similar to that of the transmission line signal switching unit 14, and is constituted by, for example, an ATM switch, and transfers ATM cells according to routing settings. In order to connect the master wireless base station 10A and the slave wireless base station 10B, each of the transmission path signal switching units 104A and 104B needs its own routing setting.
[0034]
Here, an example of the routing setting of each of the transmission path signal switching units 104A and 104B will be described with reference to FIG. FIG. 6A is a diagram illustrating an example of a master routing setting of the transmission path signal switching unit 104A in the master wireless base station 10A. FIG. 6B is a diagram illustrating an example of a slave routing setting of the transmission path signal switching unit 104B in the slave wireless base station 10B. Here, the input port, the header information of the ATM cell, and the output port are shown in association with each other.
[0035]
First, transmission and reception of ATM cells performed in master radio base station 10A will be described. For example, if the header information of the ATM cell received from the input port of the upper transmission line interface unit 101A is “VPI = 0, VCI = 20”, the transmission path signal switching unit 104A transmits the ATM cell to the maintenance monitoring control unit 103A. Transfer to Conversely, similarly, if the header information of the ATM cell received from the input port of the maintenance monitoring control unit 103A is “VPI = 1, VCI = 20”, the transmission line signal switching unit 104A transmits the ATM cell to the upper level. To the path interface unit 101A.
[0036]
Next, transmission and reception of ATM cells between master radio base station 10A and slave radio base station 10B will be described. For example, in the master wireless base station 10A, if the header information of the ATM cell received from the input port of the upper transmission path interface unit 101A is "VPI = 0, VCI = 40", the transmission path signal switching unit 104A The cell is transferred to the lower transmission path interface unit 108A. This ATM cell is transmitted to the higher-level transmission path interface unit 101B of the slave radio base station 10B via the ATM transmission path. In the slave radio base station 10B, if the header information of the ATM cell received from the input port of the higher-level transmission interface unit 101B is "VPI = 0, VCI = 40", the transmission path signal switching unit 104B transmits the ATM cell. Transfer to wireless transmission / reception unit 15B.
[0037]
Conversely, similarly, in the slave radio base station 10B, the transmission line signal switching unit 104B determines that the header information of the ATM cell received from the input port of the radio transmission / reception unit 15B is “VPI = 1, VCI = 40”. The ATM cell is transferred to the upper transmission line interface unit 101B. This ATM cell is transmitted to the lower transmission path interface unit 108A of the master radio base station 10A via the ATM transmission path. In the master radio base station 10A, if the header information of the ATM cell received from the input port of the lower transmission path interface unit 108A is "VPI = 1, VCI = 40", the transmission path signal switching unit 104A The data is transferred to the upper transmission path interface unit 101A.
[0038]
Since the ATM cells are transparently routed to the cascade-connected slave radio base stations 10B as described above, there is no inconvenience due to the cascade connection in transmitting and receiving signals.
[0039]
As described above, according to the master routing and the slave routing, each of the transmission path signal switching units 104A and 104B transfers the ATM cell, thereby transmitting the user signal between the master radio base station 10A and the slave radio base station 10B. And a control signal are transmitted and received. As a result, as shown in FIG. 4, the upper transmission line interface 101A of the master radio base station 10A transmits / receives a user signal to / from the radio network controller 2 and receives a control signal. The lower transmission line interface 108A of the master radio base station 10A transmits / receives user signals and transmits control signals to / from the slave radio base station 10B. The upper transmission line interface 101B of the slave radio base station 10B transmits and receives a user signal and receives a control signal to and from the master radio base station 10A. The lower transmission path interface 108B of the slave radio base station 10B is not used.
[0040]
Finally, an operation in which all cascade-connected wireless base stations synchronize their system clocks with the system clock of the wireless network control device 2 will be described. The upper transmission path interface unit 101A extracts a clock from a signal received from the radio network controller 2. Next, as shown in FIG. 3, the clock extracted in the upper transmission line interface unit 101A is converted to the lower transmission line interface unit by using a dotted line from the upper transmission line interface unit 101A to the lower transmission line interface unit 108A. 108A. The lower transmission path interface unit 108A generates a system clock used for transmission to the slave radio base station 10B based on the transmitted clock. Since a method of generating a system clock based on a certain clock can be easily realized by a known device, a description thereof will be omitted. As described above, by providing a path for transmitting the clock extracted in the upper transmission path interface unit 101A to the lower transmission path interface unit 108A, the system clocks of all the cascade-connected radio base stations can be adjusted by the radio network controller. 2 can be dependently synchronized with the system clock.
[0041]
As described above, in the present embodiment, the ATM transmission path has been described as an example of the data transmission path and the ATM cell has been described as the data. However, other communication schemes can be applied to the wireless base station of the present invention.
[0042]
【The invention's effect】
As described above in detail, according to the present invention, when a new wireless channel is added, a wireless base station can be easily added without adding resources of a wireless network control device or making a new line contract. In addition, efficient control can be performed by controlling the call processing of the added lower wireless base station by the upper wireless base station.
[0043]
In addition, when a wireless base station is added near an existing wireless base station, there is no restriction that an ATM transmission path must be newly drawn from the wireless network control device 2, and the cost for installing the wireless base station is further increased. Down becomes possible. Further, since the user does not need to newly make a line contract with the wireless network control device 2, there is no need to increase the cost by adding wireless base stations. In addition, since the number of radio base stations can be easily increased, the number of accommodated users can be easily adjusted, and the radio base station having one carrier and one sector can be easily made to have two carriers and one sector. it can.
[Brief description of the drawings]
FIG. 1 is a block diagram showing an example of a connection form between a radio base station and a radio network controller according to an embodiment of the present invention.
FIG. 2 is a block diagram illustrating an example of a configuration of a wireless base station according to an embodiment of the present invention.
FIG. 3 is a block diagram illustrating an example of a connection form between a master wireless base station and a slave wireless base station.
FIG. 4 is a diagram illustrating a function comparison result of each processing unit in the master wireless base station and a function comparison result of each processing unit in the slave wireless base station.
FIG. 5 is a flowchart illustrating an example of an operation of a maintenance monitoring control unit and a call processing control unit at the time of startup.
FIG. 6 is a diagram illustrating an example of a master routing setting and a slave routing setting of the transmission path signal switching unit of the wireless base station according to the embodiment of the present invention.
FIG. 7 is a block diagram showing an example of a conventional connection configuration between a radio base station and a radio network controller.
FIG. 8 is a block diagram illustrating an example of a configuration of a conventional wireless base station.
FIG. 9 is a diagram illustrating an example of a routing setting of a transmission path signal switching unit in a conventional wireless base station.
[Explanation of symbols]
10, 10A, 10B radio base station, 101, 101A, 101B upper transmission line interface unit, 102, 102A, 102B call processing control unit, 103, 103A, 103B maintenance monitoring control unit, 104, 104A, 104B transmission line signal switching unit , 15, 15A, 15B wireless transmission / reception unit, 16, 16A, 16B wireless amplification unit, 107, 107A, 107B storage unit, 108, 108A, 108B lower transmission path interface unit, 109, 109A, 109B master / slave identification unit.

Claims (1)

First transmission line interface means for transmitting and receiving data to and from a radio network controller or an upper radio base station;
Second transmission path interface means for transmitting and receiving data to and from a lower-order radio base station;
Call processing control means for performing control relating to call processing;
In a wireless base station equipped with
When the radio base station is set as a lower radio base station by being connected to the higher radio base station via the first transmission path interface means, the call processing control means of the higher radio base station A base station for controlling call processing of the lower-order base station via the second transmission path interface.

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