JPH09130852A - Line concentration device for mobile communication - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce the equipment cost taken for the number of times of transmission and to efficiently perform communication by inputting the communication from plural radio base stations, multiplexing these communications and transmitting the communications to a subscriber exchange for mobile communication. SOLUTION: The communication transmitted from a mobile communication subscriber is inputted in a radio base station 1 and the communication is inputted in a line editing device 5 via each specified transmission line 3. The line editing device 5 multiplexes these inputted communications and outputs the communications to an exchange 9 for mobile communication via a transmission line 7. In the line editing device 5, an input line number and an output line number are made to be preliminarily corresponded. Namely, the communication from a mobile communication subscriber which is inputted from the '1' time slot on the input side of the line editing device 5 in the figure is outputted from the '1' time slot on the output side. The number of the installation of the communication line inputted from the radio base station is multiplexed and the number of installation of the transmission line is reduced. In this device 5, the input communication capacity and output communication capacity is the same amount.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an ATM (As) network between a radio base station and a mobile switching center.
The present invention relates to a mobile communication concentrator that multiplexes communication from a wireless base station to a mobile communication subscriber exchange in a mobile communication network that has been made into a synchronous transfer mode.

[0002]

2. Description of the Related Art In a mobile communication network in which a network between a radio base station and a mobile communication subscriber switch is an ATM, a plurality of radio base stations 91 are conventionally provided as shown in FIG.
Communication is directly input to the mobile communication subscriber switch 92 through the respective transmission lines A to Z, and the communication from the radio base station 91 to the mobile communication subscriber switch 92 is not multiplexed. Absent.

[0003]

As described above, the communication between the radio base station and the mobile switching subscriber exchange has not been conventionally multiplexed, so that the radio base station and the subscriber exchange are not connected to each other. There is a problem in that it is uneconomical because the number of transmission lines increases between the two.

More specifically, since the line capacity from each radio base station is designed for each base station, they are divided as compared with the case where the line capacity is designed for each of a plurality of radio base stations. In addition to the loss, the communication from the radio base station to the mobile communication subscriber exchange is concentrated and transmitted without any reduction. Therefore, it is necessary to connect the radio base station and the mobile communication subscriber exchange. There is a problem that the line capacity is large.

[0005] The present invention has been made in view of the above,
It is therefore an object of the present invention to provide a mobile communication concentrator that can multiplex and concentrate communication between a radio base station and a mobile communication subscriber switchboard to improve economy and efficiency.

[0006]

In order to achieve the above object, the present invention according to claim 1 is a mobile communication network in which a network between a radio base station and a mobile switching center is an ATM. It is installed between a radio base station and a mobile communication subscriber exchange, and it is characterized in that it receives communications from a plurality of radio base stations, multiplexes these communications, and sends them to the mobile communication subscriber exchange. .

According to the first aspect of the present invention, a plurality of mobile communication concentrators are applied to a mobile communication network in which the network between the radio base station and the mobile switching center is ATM. It is possible to multiplex the communication from the wireless base station of the above and send it to the subscriber switch for mobile communication. That is, the mobile communication concentrator according to claim 1 uses the line editing function of the line concentrating function and the line editing function of the concentrator. Also, the line collection function here is
The function to output the communication to the upper output line only when the communication from the lower actually occurs for the purpose of reducing the capacity of the upper output line with respect to the total capacity of the lower input lines. Since the editing function is simply multiplexing, the total capacity of the input line and the total capacity of the output line are the same (there is no line concentrating function). Since the mobile communication concentrator shown below has a concentrating function, the capacity of the output line can be reduced relative to the total capacity of the input lines.

According to the present invention, the network between the radio base station and the mobile switching center is A.
In a TM-based mobile communication network, the mobile communication network is installed between a radio base station and a mobile communication subscriber exchange, inputs communication from a plurality of radio base stations, and joins the input communication for mobile communication. Of the transmission lines to the private branch exchange, only the transmission lines necessary for transmitting the input communication are allocated, and further, these communications are multiplexed and sent to the mobile communication subscriber exchange.

According to the second aspect of the present invention, a plurality of mobile communication concentrators are applied in a mobile communication network in which the network between the radio base station and the mobile switching center is ATM. It is possible to allocate and transmit the lines between the concentrator and the subscriber switch for mobile communication by the amount necessary for transmitting the communication input from the wireless base station.

Further, the present invention according to claim 3 provides the present invention as claimed in claim 2.
In the invention described above, it is characterized in that it has a selective discarding means for selectively discarding a part of the communication input from the radio base station when the capacity of the transmission line to the subscriber switch for mobile communication overflows. .

According to the third aspect of the present invention, when the capacity of the transmission line to the subscriber switch for mobile communication overflows, a part of the communication input from the radio base station is selectively discarded. As a result, it is possible to selectively discard the communication with the low priority.

According to a fourth aspect of the present invention, in the invention according to the second aspect, the transmission line between the concentrator and the mobile switching center is duplicated, and one of the duplicated transmission lines is transmitted. The gist of the present invention is to have a diverting means for diverting a part of the communication input from the wireless base station to the other transmission line when the line capacity overflows.

According to a fourth aspect of the present invention, the transmission line between the concentrator and the mobile switching center is duplicated, and when the capacity of one transmission line overflows, it is input from the radio base station. By discarding a part of the performed communication to the other transmission line, it is possible to prevent the communication from being discarded.

[0014]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a connection between a wireless base station using a mobile communication concentrator according to a first embodiment of the present invention and a mobile communication subscriber switchboard.
The mobile communication concentrator shown in the figure constitutes the line editing device 5. In this line editing device 5, the network between the wireless base station and the mobile switching center is made into an ATM. A plurality of wireless base stations 1 in a mobile communication network
Is connected between the mobile communication subscriber switchboard 9 and the mobile communication subscriber exchange 9, and the communication from the plurality of radio base stations 1 is input via the respective transmission lines 3 to multiplex these communications, and via the transmission line 7. The data is output to the subscriber switch 9 for mobile communication.

In such a configuration, the communication originated from the mobile communication subscriber is first input to the radio base station 1 that accommodates the corresponding radio area, and then the communication is specified from the radio base station 1 respectively. Is input to the line editing device 5 via the transmission line 3. The line editing device 5 multiplexes these input communications and outputs them to the mobile communication subscriber switch 9 via the transmission line 7.

In the line editing device 5, the input line number and the output line number are associated in advance. That is, assuming that the "1" time slot on the input side of the line editing apparatus 5 and the "1" time slot on the output side of the line editing apparatus 5 in FIG. The input communication from the mobile communication subscriber is output from the output side "1" time slot. The number of communication lines installed from the radio base station 1 becomes one by multiplexing (as few as possible if there is no transmission item corresponding to the multiplicity), and the number of transmission lines installed It can be reduced. In FIG. 1, TS means a time slot.

In the line editing apparatus 5, the input communication capacity (first transmission line 3 to nth transmission line 3
Is the same as the output communication capacity (the line capacity of the transmission line 7). Further, as a form of communication between the wireless base station 1 and the line editing device 5 and between the line editing device 5 and the mobile communication subscriber switch 9, either a line switching system or an ATM transmission system can be used.

FIG. 2 is a diagram showing a connection between a wireless base station using a mobile communication concentrator according to a second embodiment of the present invention and a mobile communication subscriber exchange. A concentrator 51 shown in the figure has a concentrating function, and a plurality of wireless base stations 1 and mobile communication subscribers are added in a mobile communication network in which the network between the wireless base station and the mobile communication subscriber switch is ATM. The plurality of radio base stations 1 connected to the central office switch 9.
Communication from each of them is input through each of the transmission lines 3, a line capacity is allocated to each of these communications by a required amount and multiplexed, and output to the mobile communication subscriber switch 9 through the transmission line 7. doing.

More specifically, when the communication from the mobile communication subscriber input to the wireless base station 1 is input to the concentrator 51 via the transmission line 3, the communication input to the concentrator 51 is compared with the communication input to the concentrator 51. A line capacity is allocated to each of the necessary amounts, and the line capacity is output to the mobile communication subscriber switch 9. That is, the communication “no. 1” from the wireless base station 1 input to the concentrator 51 is the time slot (vacant) among the transmission lines 7 between the concentrator 51 and the mobile communication subscriber switch 9. a, b, ...) and transmitted.

Therefore, the capacity of the line between the concentrator 51 and the mobile switching center 9 (the line capacity j of the transmission line 7) is the communication demand of the plurality of radio base stations 1 accommodated in the concentrator 51. Since it is designed on the basis of the total value of (1), it is smaller than the total amount (total of k (1) to k (n)) of individual line capacities. In addition, in FIG. 2, “present” means a time slot in which communication exists.

Further, the number of transmission lines 7 to be transmitted can be reduced as much as possible by multiplexing the lines to be transmitted to the subscriber switch 9 for mobile communication, as in the embodiment of FIG. The form of communication between the radio base station 1 and the line concentrator 51 and between the line concentrator 51 and the mobile communication subscriber switch 9 may be a circuit switching system or an ATM transmission system.

FIG. 3 is a diagram showing a connection between a radio base station using a mobile communication concentrator according to a third embodiment of the present invention and a mobile communication subscriber exchange. A concentrator 53 shown in the figure is provided between a plurality of wireless base stations 1 and a mobile communication subscriber switch 9 in a mobile communication network in which the network between the wireless base station and the mobile communication subscriber switch is ATM. Connected to each other, inputs communication from the plurality of wireless base stations 1 through the respective transmission lines 3, multiplexes by allocating a line capacity to each of these communications by a required amount, and transmitting through the transmission line 7. Output to the mobile communication subscriber switch 9 and, when the capacity of the transmission line 7 to the mobile communication subscriber switch 9 overflows, communication with low priority is selectively discarded.

More specifically, the line capacity (capacitance j of the transmission line 7) between the line concentrator 53 and the mobile communication subscriber switch 9 is the same as that of the transmission line 3 from the radio base station 1 accommodated in the line concentrator 53. Total line capacity (total capacity of the first transmission line 3 to the nth transmission line 3 (k (1) to k (n)
Less than the total). Therefore, when the communication input from the wireless base station 1 accommodated in the concentrator 53 exceeds the predetermined design value (capacity j of the transmission line 7) and is input to the concentrator 53, that is, the communication of the transmission line 7 When communication having a capacity larger than the capacity is input to the concentrator 53,
An output time slot is preferentially assigned to an input time slot (TS) in which high priority communication is accommodated, and only high priority communication is selectively sent to the mobile communication subscriber switch 9. It

That is, in the line concentrator 53, the transmission line 7 between the line concentrator 53 and the mobile switching center 9 is used.
Allocation of the (output side line) to the empty time slot (TS) is allocated to the input side time slot (TS) (where the time slot (T
S) the position changes), priority communication is sent to the mobile communication subscriber switch 9 without overflowing.

In the concentrator 53, there are two methods for allocating the output side time slots to the input side time slots accommodating high priority communication. The first method is to discard the contents of the input-side time slot in which the low-priority communication is accommodated so that the time slot of the output-side line that is prioritized to the time-slot in which the high-priority communication is accommodated is discarded. The second method is for allocating, and the second method is a method for preferentially allocating the time slot of the input side line accommodating the communication of high priority to the time slot of the output side line.

Further, as a mode of communication between the radio base station 1 and the line concentrator 53 and between the line concentrator 53 and the mobile communication subscriber switch 9 of this embodiment, either a circuit switching system or an ATM transmission system is used. It is possible. Further, it is also possible to use the CLP set in the ATM cell header in the ATM transmission method as the data index indicating the priority.

FIG. 4 is a diagram showing a connection between a radio base station using a mobile communication concentrator according to a fourth embodiment of the present invention and a mobile communication subscriber exchange. The concentrator 55 shown in the figure is provided between a plurality of radio base stations 1 and a mobile communication subscriber switch 9 in a mobile communication network in which the network between the radio base station and the mobile communication subscriber switch is ATM. Connected to each other, inputs communications from the plurality of wireless base stations 1 via the respective transmission lines 3, multiplexes these communications, and a duplicated line including a first transmission line 71 and a second transmission line 72. The data is output to the mobile communication subscriber switch 9 via 70.

The concentrator 55 shown in FIG.
The communication from the mobile communication subscriber input via the transmission line 3 can be sent to both the first transmission line 71 and the second transmission line 72 of the duplex line 70. In this case, as a duplex mode, for example, the first transmission line 71 is set to the 0 system, the second transmission line 72 is set to the 1 system, and in normal operation, the transmission lines 71 and 72 of the 0 system and the 1 system are sent. ,
In this case, if the communication input in the 0-system overflows, it is sent to the 1-system, and conversely, if the communication input in the 1-system overflows, it is sent to the 0-system. 1
The transmission line 71 is used as the active system and the second transmission line 72 is used as the standby system, and is normally transmitted only to the first transmission line 71 of the active system, and when the communication input in the active system overflows, the standby system is used. The second mode of sending to the second transmission line 72 of FIG. In addition,
In the second mode, the ISD is used as the backup transmission line.
An N line, a frame relay line, a cell relay line or a dedicated line can be applied.

The control in the first form or the second form is implemented in the concentrator 55. That is, when there is communication to be sent out over the capacity of the transmission line in one transmission line of the duplex line 70 between the line concentrator 55 and the mobile communication subscriber switch 9, the line concentrator 55 is used for mobile communication. Control for changing the communication to be sent to the subscriber exchange 9 to the other transmission line and sending it, that is, changing from 0 system to 1 system or from 1 system to 0 system, or from active system to standby system Is carried out.

In the concentrator 55, as an opportunity to switch the communication from one transmission line of the duplexed line 70 to the other transmission line, one of the transmission lines (0 system (1 system) or the working system) is sent over the line capacity. In addition to the case where there is communication to be transmitted, it is also possible that one (0 system (1 system) or working system) transmission line fails and communication cannot be transmitted at all. In addition, the wireless base station 1 and the line concentrator 55 of the present embodiment.
And the line concentrator 55 and the mobile communication subscriber switch 9
As a form of communication with the
A transmission method is also possible.

[0031]

As described above, according to the present invention as set forth in claim 1, it is possible to multiplex communications from a plurality of radio base stations and send them to a mobile communication subscriber switchboard, and to transmit them to a transmission line. Such equipment cost can be reduced.

Further, according to the present invention as set forth in claim 2, among the transmission lines input from the plurality of radio base stations to the subscriber switch for mobile communication, the mobile communication is performed only for the communication line for which communication demand is generated. By allocating the transmission line to the local exchange, the line capacity between the concentrator and the mobile switching center can be reduced compared to the case where no concentrator is installed, and the transmission line block rate is Can be designed the same.

Further, according to the present invention as set forth in claim 3, when the capacity of the transmission line to the subscriber switch for mobile communication overflows, a part of the communication input from the radio base station is selectively discarded. By doing so, it is possible to selectively discard communication with low priority and prevent discard of communication with high priority.

According to the fourth aspect of the present invention, the transmission line between the concentrator and the subscriber switch for mobile communication is duplicated, and when the capacity of one transmission line overflows, it is input from the radio base station. By diverting some of the communication that was carried out to the other transmission line, it is possible to prevent the communication from being discarded and to use the other transmission line when one of the duplicated transmission lines cannot be used due to a failure or the like. Can prevent the communication from being discarded.

[Brief description of the drawings]

FIG. 1 is a diagram showing a connection between a wireless base station using a mobile communication concentrator according to a first embodiment of the present invention and a mobile communication subscriber exchange.

FIG. 2 is a diagram showing a connection between a wireless base station using a mobile communication concentrator according to a second embodiment of the present invention and a mobile communication subscriber exchange.

FIG. 3 is a diagram showing a connection between a wireless base station using a mobile communication concentrator according to a third embodiment of the present invention and a mobile communication subscriber exchange.

FIG. 4 is a diagram showing a connection between a radio base station using a mobile communication concentrator according to a fourth embodiment of the present invention and a mobile communication subscriber switching system.

FIG. 5 is a diagram showing a connection between a radio base station and a mobile communication subscriber switch in a conventional mobile communication network.

[Explanation of symbols]

 1 Radio Base Station 3, 7 Transmission Line 5 Line Editing Device 9 Mobile Communication Subscriber Switch 51, 53, 55 Concentrator 70 Duplex Line 71 First Transmission Line 72 Second Transmission Line

Claims (4)

[Claims] 1. In a mobile communication network in which a network between a radio base station and a mobile communication subscriber switch is an ATM, a plurality of radios are installed between the radio base station and the mobile communication subscriber switch. A mobile communication concentrator, which receives communications from a base station, multiplexes these communications, and sends them to a mobile switching center. 2. In a mobile communication network in which a network between a radio base station and a mobile communication subscriber switch is an ATM, a plurality of radios are installed between the radio base station and the mobile communication subscriber switch. Input the communication from the base station, allocate only the transmission lines necessary for transmitting the input communication among the transmission lines to the mobile switching center for the input communication, and further A concentrator for mobile communications, characterized in that communications are multiplexed and sent to a subscriber exchange for mobile communications. 3. A selective discarding means for selectively discarding a part of the communication input from the wireless base station when the capacity of the transmission line to the subscriber switch for mobile communication overflows. The mobile communication concentrator according to claim 2. 4. The transmission line between the concentrator and the subscriber switch for mobile communication is duplicated, and when the capacity of one transmission line of this duplicated transmission line overflows, it is input from the radio base station. The mobile communication concentrator according to claim 2, further comprising a detouring unit that detours a part of the communication to the other transmission line.