KR100597133B1 - Mobile Communication System and Driving Method Thereof - Google Patents

Abstract

The present invention relates to a mobile communication system in which only a part of a plurality of channels of a dedicated line can be used.

The mobile communication system of the present invention is a base station installed in order to ensure the call quality, a base station controller for controlling the base station, and connected to the base station for supplying data supplied from the base station to some of the plurality of channels of the dedicated line And a second channel assignment device connected to the base station controller for supplying data supplied from the base station controller to some of the plurality of channels of the dedicated line.

Description

Mobile Communication System and Driving Method Thereof             

1 is a diagram illustrating a conventional mobile communication system.

2 illustrates a mobile communication system according to an embodiment of the present invention.

3 is a block diagram showing in detail the channel assignment apparatus shown in FIG.

4A and 4B are flowcharts showing an operation process of the channel assignment apparatus shown in FIG.

5 and 6 illustrate data delays corresponding to the number of channels.

<Description of Symbols for Main Parts of Drawings>

4,24: HDLC detector 6,28: control signal generator

8: high density queue 10,32: queue management memory

12: IPC transmitter 14: processor

16: time slot controller 18: synchronization signal generator

22: valid data detector 26: IPC receiver

30: low density queue 50,52: receiving unit

54: control unit 100,110: base station

102,114 base station controller 104,116 mobile switching center

112a, 112b: Channel assignment device

The present invention relates to a mobile communication system and a driving method thereof, and more particularly, to a mobile communication system and a driving method thereof in which only a part of a plurality of channels of a dedicated line can be used.

The mobile communication system provides various types of services such as voice, integrated service digital network (ISDN), facsimile and data provision using a mobile station (MS) connected wirelessly. Such a mobile communication system has a reduction in subscriber network construction cost, time and maintenance cost compared to a wired network, as well as improved call quality due to various subscriber network configurations.

1 is a view schematically showing a conventional mobile communication system.

Referring to FIG. 1, a conventional mobile communication system includes a mobile switching center (MSC) 104, a base station controller (BSC) 102, and a base transceiver station (BTS) 100. Equipped.

The base station 100 transmits / receives data between a mobile communication terminal (not shown) and the base station controller 102. Indeed, a plurality of base stations 100 are installed at a predetermined interval so that the call quality of the mobile communication terminal can be secured, and is connected to the mobile communication terminal while performing baseband signal processing and wireless signal transmission and reception.

The base station controller 102 controls the base station 100 so that a desired operation can be performed at the base station 100. In practice, the base station controller 102 performs functions of transmission output control between mobile communication terminals, handoff between base stations 100, and operation and maintenance of the base station 100.

The mobile switching center 104 performs call processing, additional service processing, location registration, handoff, and interworking with other mobile switching terminals of the mobile communication terminal. To this end, the mobile switching center 104 is configured to perform an Access Switching Sunsystem (ASS) that performs a distributed call processing function, an Interconnection Network Sunsystem (INS) that performs a centralized call processing function, and a CCS (Central Management Function) that manages centralization of operation and maintenance. It further includes various subsystems such as a Central Control Sunsystem (LOC) and a Location Registration Subsystem (RLS) that stores and manages information of mobile subscribers.

In such a conventional mobile communication system, the base station 100 and the base station controller 102 are connected by an E1 dedicated line. That is, the base station 100 and the base station controller 102 conventionally transmit / receive data via the E1 dedicated line. However, conventionally, since the E1 dedicated cable channel is allocated and used regardless of the amount of transmit / receive data, resources are wasted and high costs are generated.

Accordingly, an object of the present invention relates to a mobile communication system and a driving method thereof in which only some of a plurality of channels of a dedicated line can be used.

In order to achieve the above object, a mobile communication system of the present invention includes a base station having a plurality of base stations installed to secure call quality, a base station controller for controlling base stations, and data supplied from the base station connected to the base station. A first channel assigning device for supplying some channels, and a second channel assigning device for supplying data supplied from the base station controller connected to the base station controller to some of the plurality of channels of the dedicated line.

The number of channels used in the first channel assignment device and the second channel assignment device is the same.

The first channel assigning device supplies data supplied from the second channel assigning device to the base station, and the second channel assigning device supplies data supplied from the first channel assigning device to the base station controller.

Each of the first channel assignment apparatus and the second channel assignment apparatus includes a first receiver for receiving data supplied from a base station or a base station controller, a second receiver for receiving data supplied to a part of a dedicated line, and a first receiver. And a control unit for controlling the receiving unit and the second receiving unit.

The first receiver includes a high level data (HDLC) detector for receiving data supplied from a base station or a base station controller, a high density queue for temporarily storing data, and a start address and length information of data stored in the high density queue. And a queue management memory for storing information data, and a control signal generator for controlling data and information data to be output.

The high density queue performs a speed conversion function so that data supplied from a base station or a base station controller can be supplied to some of a plurality of channels of a dedicated line.

The second receiver includes a valid data detector for receiving data supplied to some of the plurality of channels of the dedicated line, a high level data (HDLC) detector for receiving data supplied from the valid data detector, and temporarily storing data. A low density queue, a queue management memory for storing information data including start addresses and length information of data stored in the low density queue, and a control signal generator for controlling data and information data to be output.

The low density queue performs a speed conversion function so that data supplied to some channels of a plurality of channels of a dedicated line can be supplied to a base station or a base station controller.

The controller may include a processor, an IP transmitter for supplying an IPC packet necessary for data transmission under the control of the processor, and data to be supplied to some channels among a plurality of channels of the dedicated line under the control of the processor. And a time slot control unit for allocating a time slot, and a synchronization signal generator for generating and outputting a synchronization signal so that data can be normally received in a channel allocated by the time slot control unit.

The timeslot controller supplies the data supplied from the first receiver to some channels.

The control unit further includes an IP receiver for receiving an IPC packet supplied through some channels among a plurality of channels of the dedicated line.

A method of driving a mobile communication system according to the present invention includes allocating a partial channel for transmitting and receiving data among a plurality of channels of a dedicated line, and transmitting and receiving data at a base station and a base station controller using the partial channel.

The transmitting and receiving of data may include a first step of transmitting data supplied from a base station or a base station controller to a partial channel, and a second step of receiving data to be supplied to a partial channel in a first step and transmitting the data to a base station controller or a base station. Include.

The first step includes receiving data supplied from a base station or a base station controller, temporarily storing the received data for speed conversion, and generating a synchronization signal so that the speed converted data can be supplied to some channels. And supplying the synchronization signal and the speed-converted data to some channels.

The second step includes receiving data supplied to some channels, temporarily storing the received data for speed conversion, and transmitting the speed converted data to the base station controller or the base station.

The leased line is a binary (E1) network.

The partial channel is four or more channels among the channels of the dedicated line.

Other objects and features of the present invention in addition to the above objects will become apparent from the description of the embodiments with reference to the accompanying drawings.

Hereinafter, exemplary embodiments of the present invention will be described with reference to FIGS. 2 to 6.

2 is a diagram schematically illustrating a mobile communication system of the present invention.

2, a mobile communication system of the present invention includes a mobile switching center (MSC) 116, a base station controller (BSC) 114, channel assignment apparatuses 112a and 112b, and a base station (BTS) 110. .

The base station 110 transmits / receives data between a mobile communication terminal (not shown) and the base station controller 114. Indeed, a plurality of base stations 110 are installed at a predetermined interval so that the call quality of the mobile communication terminal can be secured and connected to the mobile communication terminal while performing baseband signal processing and transmitting / receiving radio signals.

The base station controller 114 controls the base station 110 so that a desired operation can be performed at the base station 110. In practice, the base station controller 102 performs functions of transmission output control between mobile communication terminals, handoff between base stations 110, and operation and maintenance of the base station 100.

The mobile switching center 116 performs call processing, supplementary service processing, location registration, handoff, and interworking with other mobile switching stations of the mobile communication terminal. To this end, the mobile switching center 116 may be configured to include an Access Switching Sunsystem (ASS) that performs distributed call processing, an Interconnection Network Sunsystem (INS) that performs centralized call processing, and a CCS (Centralized Service Management). It further includes various subsystems such as a Central Control Sunsystem (LOC) and a Location Registration Subsystem (RLS) that stores and manages information of mobile subscribers.

The channel assignment apparatuses 112a and 112b allocate a predetermined channel so that data can be transmitted / received between the plurality of base stations 110 and the base station controller 114. The first channel assignment apparatus 112a is connected to a plurality of base stations 110 by a dedicated line and receives data from the plurality of base stations 110. The first channel assignment apparatus 112a receiving the data transmits data using at least one of 32 channels of E1. In addition, the first channel assignment apparatus 112a transmits the data supplied from the second channel assignment apparatus 112b to the base station 110.

In detail, the E1 dedicated line has 32 channels (2.048 MHz (32 ch x 8 bits x 8 kHz)). Here, data may be transmitted / received using 30 channels except two channels used for signal and synchronization among 32 channels of E1. The first channel assignment apparatus 112a transmits and receives data using only some channels among 30 channels capable of transmitting and receiving data. For example, the first channel allocator 112a may transmit and receive data using only four channels among thirty E1 channels.

The second channel assignment apparatus 112b is connected to the base station controller 114 and allocates a predetermined channel so that data can be transmitted / received. In other words, the second channel allocator 112b uses the partial channel (Fraction E1: F-E1) among the plurality of channels of the E1 dedicated line to transmit data between the base station controller 114 and the first channel allocator 112a. Send and receive. For example, the second channel allocator 112b may transmit and receive data using only four channels out of the 30 E1 channels. In the first channel allocator 112a and the second channel allocator 112b, The number of channels to use is set the same)

That is, in the embodiment of the present invention, since data can be transmitted and received using some channels (for example, four channels) among the plurality of channels of the E1 dedicated line, waste of resources can be prevented. In detail, in the related art, data is transmitted and received while occupying all channels of the E1 dedicated line. However, in the present invention, since it is possible to transmit and receive data using some channels of the E1 dedicated line, it is possible to prevent waste of resources, thereby reducing costs. In fact, channels not used in the E1 dedicated line can be used for the transmission of various other data.

3 is a block diagram illustrating in detail the channel allocation apparatus shown in FIG.

Referring to FIG. 3, the channel assignment apparatuses 112a and 112b of the present invention include a first receiver 50, a second receiver 52, and a controller 54.

The first receiver 50 receives data supplied from the base station controller 114 or the base station 110. To this end, the first receiver 50 includes a high-level data link control (hereinafter referred to as "HDLC") detector 4, a control signal generator 6, a high density queue 8 and a queue management memory. (10) is provided.

The HDLC detection unit 4 receives HDLC data (packets) supplied from the base station controller 114 or the base station 110. Here, the HDLC detector 4 simultaneously receives various synchronization signals required for receiving HDLC data.

The high density queue 8 temporarily stores HDLC data supplied from the HDLC detection unit 4. In practice, the high density queue 8 performs a speed conversion function so that the high speed HDLC data supplied from the HDLC detection unit 4 can be supplied to the low speed channel.

The queue management memory 10 stores the start address of the HDLC data and the length information of the HDLC data (hereinafter referred to as "information data") stored in the high density queue 8.

The control signal generator 6 supplies a first control signal (read / write) (i.e., output and input control) to the high-density queue 8, and supplies a second control signal to the queue management memory 10 so as to provide a queue. The information data stored in the management memory 10 is controlled to be output.

The second receiver 52 receives data supplied from the channel assignment apparatus 112a or 112b provided on the other side. To this end, the second receiver 52 includes a valid data detector 22, an HDLC detector 24, a control signal generator 28, a low density queue 30, and a queue management memory 32.

The valid data detector 22 receives HDLC data supplied to some channels of the E1 dedicated line. Here, the valid data detector 22 receives only HDLC data in response to a synchronization signal supplied to some channels of the E1 dedicated line.

The HDLC detector 24 receives the HDLC data supplied from the valid data detector 22. Here, the HDLC detector 24 simultaneously receives various synchronization signals necessary for receiving HDLC data.

The low density queue 30 temporarily stores the HDLC data supplied from the HDLC detector 24. In practice, the low density queue 30 performs a speed conversion function so that low-speed HDLC data supplied from the HDLC detector 24 can be supplied to a high-speed channel.

The queue management memory 32 stores information data of HDLC data stored in the low density queue 30.

The control signal generator 28 supplies the first control signal (read / write) to the low density queue 30 and also supplies the second control signal to the queue management memory 32 to store information stored in the queue management memory 32. Control the output.

The controller 54 controls the first and second receivers 50 and 52 so that data can be transmitted and received. To this end, the controller 54 includes an IPC (InterProcess Communication) transmitter 12, a processor 14, a timeslot controller 16, a synchronization signal generator 18, and an IPC receiver 26.

The processor 14 controls the overall operation of the channel assignment apparatuses 112a and 112b. In practice, the processor 14 controls the transmission and reception of alarms and status information necessary for operation maintenance. In addition, the processor 14 controls to select some channels of the E1 dedicated line.

The IPC transmitter 12 supplies the IPC packet to the synchronization signal generator 18 under the control of the processor 14.

The IPC receiver 26 receives an IPC packet supplied from the second receiver 52. The IPC packet received by the IPC receiver 26 is supplied to the processor 14, and the processor 14 performs a control operation with reference to the IPC packet supplied thereto.

The timeslot controller 16 outputs data to some channels of the E1 dedicated line during the selected timeslot period (that is, the selected some channels) from the processor 14. Here, the timeslot controller 16 receives the clocks (2.048Mhz, 8Khz) from the E1 dedicated line so that data can be supplied to some channels of the E1 dedicated line.

The synchronization signal generator 18 generates and outputs a synchronization signal so that the data output from the partial slot of the E1 dedicated line can be normally received from the timeslot controller 16. For example, if four channels of the E1 dedicated line are used, a synchronization signal is generated and output during four channel periods.

The process of supplying data to some channels of the E1 dedicated line in the channel assignment apparatuses 112a and 112b of the present invention will be described in detail with reference to the flowchart of FIG. 4A.

4A, first, the HDLC detector 4 receives data supplied from the base station controller 114 or the base station 110. (S60) The data received in step S60 is temporarily stored in the high density queue 8. (S62) The data temporarily stored in the step S62 is supplied to the synchronization signal generation unit 18 together with the information data stored in the queue management memory 10 under the control of the control signal generation unit 6.

In the meantime, the timeslot control unit 16 has a timeslot section so that data can be output only in some channels (for example, 4 channels) of the E1 channel. The synchronization signal generator 18 outputs the synchronization signal and the IPC packet supplied from the IPC transmitter 12 during the time slot periods of four channels preset (S64). The synchronization signal generator 18 then supplies a high-density queue. The data supplied from (8) is supplied to the timeslot control unit 16 to be output through four preset channels (S66).

4B is a flowchart illustrating a process of receiving data when data is supplied to some channels of the E1 dedicated line.

Referring to FIG. 4B, first, the valid data detector 22 receives data in response to a synchronization signal supplied to some channels of an E1 dedicated line. The data detected by the valid data detector 22 is supplied to the HDLC detector 24 (S70). The data received in step S70 is temporarily buffered while being temporarily stored in the low density queue 30 (S72). 24) supplies the IPC packet included in the data supplied to the IPC receiver 26. The data stored in the low density queue 30 is transmitted to the base station controller 114 or the base station 110 together with the information data stored in the queue management memory 32 under the control of the control signal generator 28.

Meanwhile, in the present invention, the simple data can be supplied in a V.35 manner instead of some channels of the E1 dedicated line. That is, the high-density queue 8 can supply the data supplied to it by the V.35 system line. The HDLC detector 24 may receive data supplied to a V.35 type line from the outside.

5 is a diagram showing a calculated value of the delay of data generated corresponding to the use channel of the E1 dedicated line.

Referring to FIG. 5, a delay of approximately 6.3 ms or more occurs when using one channel of the E1 dedicated line. However, when using four channels of the E1 dedicated line, a delay of about 1.8 ms occurs. That is, in case of using 4 channels among E1 dedicated lines, the delay time is not significantly different compared with the case of using all 31 channels. Therefore, in the present invention, by using at least four or more channels of the E1 dedicated line, it is possible to efficiently transmit data and prevent waste of resources.

In fact, when the delay generated corresponding to each channel of the E1 dedicated line is measured, as shown in FIG.

Referring to FIG. 6, the delay actually generated corresponding to the use channel of the E1 dedicated line may be slightly different from the calculated value shown in FIG. 5 (by the components such as resistance and noise). When four channels of the E1 dedicated line are used, the delay time does not occur as compared with the case of using all 31 channels.

As described above, according to the mobile communication system and its driving method according to the present invention, since it is possible to transmit and receive data using only some of the plurality of channels of the E1 dedicated line, it is possible to prevent waste of resources. In other words, some channels of the E1 dedicated line are allocated for transmitting and receiving data of the mobile communication system, and the other channels can be used for various other purposes. In addition, in the present invention, since only some channels of the E1 dedicated line are used, the use cost can be reduced.

Those skilled in the art will appreciate that various changes and modifications can be made without departing from the technical spirit of the present invention. Therefore, the technical scope of the present invention should not be limited to the contents described in the detailed description of the specification but should be defined by the claims.

Claims (17)

A base station installed a plurality of to secure the call quality, A base station controller for controlling the base stations; A first channel allocating device connected to the base station for supplying data supplied from the base station to some of a plurality of channels of a dedicated line; A second channel assignment device connected to the base station controller for supplying data supplied from the base station controller to some of the plurality of channels of the dedicated line, Each of the first channel assignment device and the second channel assignment device A first receiver for receiving the data supplied from the base station or base station controller; A second receiver for receiving data supplied to some channels of the dedicated line; And a control unit for controlling the first receiver and the second receiver. The method of claim 1, And the number of channels used by the first channel assignment device and the second channel assignment device is the same. The method of claim 1, The first channel assigning device supplies data supplied from the second channel assigning device to the base station, and the second channel assigning device supplies data supplied from the first channel assigning device to the base station controller. Mobile communication system. delete The method of claim 1, The first receiver is A high level data (HDLC) detector for receiving the data supplied from the base station or the base station controller; A high density queue for temporarily storing the data; A queue management memory storing information data including a start address and length information of the data stored in the high density queue; And a control signal generator for controlling the data and the information data to be output. The method of claim 5, And the high density queue performs a speed conversion function such that the data supplied from the base station or the base station controller can be supplied to some of the plurality of channels of the dedicated line. The method of claim 1, The second receiving unit A valid data detector for receiving data supplied to some of the plurality of channels of the dedicated line; A high level data (HDLC) detector for receiving data supplied from the valid data detector; A low density queue for temporarily storing the data; A queue management memory storing information data including a start address and length information of the data stored in the low density queue; And a control signal generator for controlling the data and the information data to be output. The method of claim 7, wherein And the low density queue performs a speed conversion function so that data supplied to some of the plurality of channels of the leased line can be supplied to the base station or the base station controller. The method of claim 1, The control unit Processor, An IP transmitter for supplying an IPC packet necessary for transmitting the data under the control of the processor; A timeslot controller for allocating timeslots so that data can be supplied to some channels of the plurality of channels of the dedicated line under control of the processor; And a synchronization signal generator for generating and outputting a synchronization signal so that data can be normally received in a channel allocated by the timeslot controller. The method of claim 9, And the timeslot controller is configured to supply the data supplied from the first receiver to the partial channel. The method of claim 9, The control unit further comprises an IP receiver for receiving an IPC (IPC) packet supplied via some of the plurality of channels of the dedicated line. A first step of allocating some channels for transmitting and receiving data among a plurality of channels of a dedicated line; A second step of transmitting data supplied from a base station or a base station controller to the partial channel; A third step of receiving data supplied to the partial channel; A fourth step of temporarily storing the received data and converting the speed; And a fifth step of transmitting the speed converted data to the base station controller or a base station. delete The method of claim 12, The second step is Receiving data supplied from the base station or base station controller; Temporarily storing the received data and converting the speed; Generating a synchronization signal to supply the speed-converted data to the partial channel; And supplying the synchronization signal and the speed-converted data to the partial channel. delete The method of claim 12, And the dedicated line is a binary (E1) network. The method of claim 16, The partial channel is a driving method of a mobile communication system, characterized in that more than four channels of the channel of the dedicated line.

Images