JPH10112737A - Priority data transmission method in mobile communication system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To transmit signal data with high priority to a line earlier when the priority signal data are in existence even when a communication circuit control section detects congestion in signal data by sending signal data stored in areas with high priority in a transmission buffer to a wired line with priority. SOLUTION: A communication line control section 20 sends a signal from a dual port RAM 201 to a line connection section 205. That is, in the case that data are in existence in a buffer with priority 1, the data are sent with priority, but when data are in existence in the buffer with priority 1, data in existence in a buffer with priority 2 are not sent after all. Signal data with high priority are transmitted sequentially with a prescribed algorithm such that in the case that the data in the buffer with priority 1 are sent for N times with priority, then data in the buffer with priority 2 are sent for S times. Thus, the signal data (call control signal data) with high priority are sent with priority.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a priority data transmission method in a mobile communication system, and more particularly, to signal data transmission over a wired line between a base station and a control station.
The present invention relates to a priority data transmission method for transmitting a call control signal prior to an operation and maintenance signal when transmitting signal data.

[0002]

2. Description of the Related Art FIG. 1 is a block diagram showing an example of the configuration of a mobile communication system in which a priority data transmission method according to the present invention is implemented. Technology will be described. As shown in FIG. 1, the mobile communication system includes a plurality of mobile stations 1a to 1n, a plurality of base stations (shown as base station modems in FIG. 1) 2a and 2b connected to these mobile stations by radio lines. A control station (shown as a line control device in FIG. 1) 4 connected to the base station by a wired line 3, a PSTN (public line network) to which the control station is connected, and receiving operation and maintenance signal data connected to the control station And an operation monitoring console 6 for monitoring the quality of the wireless line. In such a mobile communication system, call control signal data and operation / maintenance signal data are transmitted and received between the base station modem 2 and the line controller 4 via the wired line 3. 2
The line controller 4 includes a communication line controller for transmitting and receiving signal data and a main controller for processing data to be transmitted and received.

FIG. 2 shows an example of the configuration of a main control unit 10 and a communication line control unit 20 provided in the base station modem 2 shown in FIG. 1 (the same is provided in the line control unit 4). FIG. 2 is a block diagram illustrating one embodiment of the present invention. However, except for the difference in the structure of the buffer of the dual port RAM 201, the hardware configuration is the same. Explain the technology. 2, 101 and 202 are CPUs, and 102 and 203 are ROs.
M, 103 and 204 are RAMs, and 104 is a G in which a high-speed operation microprocessor and a large-capacity memory are integrated on one board.
AT board 201, main control unit 10 and communication line control unit 2
Dual port RAM interface between 0,
A line connection unit 205 is connected to the wired line 3 shown in FIG.

Next, a base station modem 2 and a line controller 4
A conventional method of transmitting priority signal data in data transmission between the two will be described. The conventional method of transmitting priority signal data is similar to the prior art disclosed in Japanese Patent Application Laid-Open No. 58-90852, for example, in which the received data is transmitted to the main control unit 1.
0, and the stored signal data is sequentially transferred to the dual port RAM 201 of the communication line control unit 20 in accordance with the priority of the signal data. The dual port RAM 201 sends out the signal data in the order of transfer. That is, the dual port RAM 201 serving as an interface of the conventional communication line control unit 20 is divided into a reception buffer and a transmission buffer. Therefore, in the communication line control unit 20, signal data is transmitted in the order of arrival at the transmission buffer. Sending to line 3.

[0005]

As described above, in the prioritized data transmission method in the conventional mobile communication system, the signal data is transmitted in the order of arrival at the dual port RAM by the communication line control unit 20, so that the dual port R
Even if high-priority signal data arrives in the AM transmission buffer, the priority signal data cannot be transmitted to the line unless the signal data that has been waiting on the transmission buffer is transmitted to the line. Is delayed in the signal data transmission processing of the communication line control unit 20.

SUMMARY OF THE INVENTION The present invention has been made to solve such a problem. When priority signal data is present in a communication line control unit even when signal data is congested, the priority signal data is quickly transmitted to the line. Can be sent to
It is an object of the present invention to provide a priority data transmission method in a mobile communication system in which priority signal data can be transmitted with priority even in signal data transmission processing of a communication line control unit.

[0007]

The priority data transmission system in the mobile communication system according to the present invention transmits and receives signal data over a wired line between a base station and a control station which constitute the system. In a priority data transmission method in a mobile communication system in which a dual port RAM is provided as an interface between a main control unit and a communication line control unit, the dual port RAM includes:
A dual port RAM having a transmission buffer divided into a plurality of areas according to a predetermined priority, wherein the area of the transmission buffer to be stored is made different according to the priority of the signal data, and stored in a transmission buffer of an area having a higher priority And transmitting the selected signal data to the wired line preferentially.

[0008] Further, the means for giving priority to the signal data stored in the transmission buffer in the area with the higher priority order and sending out the signal data to the wired line includes transmitting the signal data stored in the transmission buffer in the area with the higher priority level to N. After transmitting the signal, the signal data stored in the transmission buffer of the low priority area is transmitted S times (N and S are N> S, each of which is an integer selected according to the content of each signal data). It is characterized by being performed with.

Further, the signal data stored in the transmission buffer in the high priority area is used as call control signal data, and the signal data stored in the transmission buffer in the low priority area is used as operation and maintenance signal data. And

In the priority data transmission system in the mobile communication system according to the present invention, priority signal data is distinguished even on an interface between a main control unit and a communication line control unit, and the communication line control unit transmits the priority signal data to a wired line. An algorithm for sending data with priority is provided, and transmission delay of call control signal data can be reduced even when operation and maintenance signal data is interposed.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an example of the configuration of a mobile communication system in which the priority data transmission system of the present invention is implemented. As shown in FIG. 1, the mobile communication system includes a plurality of mobile stations 1a to 1n, a plurality of base stations (shown as base station modems in FIG. 1) 2a and 2b connected to these mobile stations by radio lines. A control station (shown as a line control device in FIG. 1) 4 which is connected to the base station by a wired line 3 and has a call control function necessary for call connection and a control function for performing operation and maintenance. It comprises a PSTN (Public Line Network) to be connected, and an operation monitoring console 6 connected to a control station to receive operation and maintenance signal data and monitor the quality of the wireless line. In such a mobile communication system, call control signal data and operation / maintenance signal data are transmitted and received between the base station modem 2 and the line controller 4 via the wired line 3. 2 and the line controller 4 each include a communication line controller for transmitting and receiving signal data and a main controller for processing data to be transmitted and received.

FIG. 2 shows one embodiment of the configuration of the main control unit 10 and the communication line control unit 20 provided in the base station modem 2 shown in FIG. 1 (the same is also provided in the line control unit 4). It is a block diagram showing a form. In FIG. 2, 10
1, 202 is a CPU, 102, 203 are a ROM,
3, 204, a RAM; 104, a GAT board in which a high-speed operation microprocessor and a large-capacity memory are integrated on one board; 201, a dual-port RAM serving as an interface between the main control unit 10 and the communication line control unit 20; Is a line connection unit, which is connected to the wired line 3 shown in FIG.

FIG. 3 shows the dual port RAM shown in FIG.
FIG. 4 is a diagram showing a buffer structure of a dual port RAM 201 used in the present embodiment as shown in FIG.
The transmission buffer is divided into areas for each transmission priority, and each divided area is composed of 1 to m buffers, and the reception buffer is composed of 1 to n buffers (mx Number of divisions = n). That is, the transmission buffer is divided into a plurality of areas with a predetermined priority, and the transmission of the signal data is performed according to the priority of the transmission buffer using a certain algorithm as described later.

FIG. 4 is a diagram showing the structure of signal data used in the present embodiment, wherein a signal ID indicating the classification of signal data is provided at the head of the signal data. FIG. 5 is a flowchart showing a procedure in which the main control unit 10 shown in FIG. 2 transmits signal data to the dual port RAM 201 of the communication line control unit 20. FIG. 6 shows a communication port control unit 20 shown in FIG.
6 is a flowchart illustrating a procedure for transmitting signal data from a communication unit to a line connection unit.

Next, the operation of this embodiment will be described.
As described above, the signal data used in this embodiment is the signal data shown in FIG.
As shown in the figure, the first octet has an ID indicating the classification of the signal.
Code (hereinafter abbreviated as SID) is defined, and FIG.
In the example shown in (1), "01" is assigned to signal data relating to a call control signal having a higher priority, and "02" is assigned to signal data relating to an operation and maintenance signal having a modest priority. When an outgoing call is made from the mobile station 1 shown in FIG. 1, the outgoing call signal is demodulated by the base station modulation / demodulation device 2 via a radio line to become call control signal data. Base station modem 2
Checks the SID shown in FIG. 4 according to the transfer procedure shown in FIG. 5 when the signal data is received from the wireless line, and when it recognizes that the signal data is a call control signal, the dual port shown in FIG. The data is transferred to a position in the transmission buffer of the RAM 201 allocated for call control, that is, to a vacant buffer among the transmission buffers 1 to m having the transmission priority 1.

If the signal data is recognized as an operation and maintenance signal by checking the SID, if the signal is recognized as an operation and maintenance signal, the transmission buffer in the dual port RAM 201 shown in FIG. Are transferred to empty buffers among the transmission buffers 1 to m. The operation / maintenance signal data is, for example, signal data obtained by periodically measuring the quality of the wireless line, and is checked by a check program incorporated in the base station modem 2, for example, and the wired line 3 and the line control device 4 are checked. Operation monitoring console 6
The operation and maintenance signal data is transmitted to the transmission buffer of transmission priority 2 because it has a lower priority than the call control signal data.

The communication line control unit 20 shown in FIG. 2 executes the dual port RAM 201 by the transmission procedure shown in FIG.
Transmits the signal data to the line connection unit 205. That is, if data exists in the first priority buffer, this data is transmitted with priority. However, if data is always present in the first priority buffer, data cannot be transmitted no matter how long the data existing in the second priority buffer is reached. Therefore, for example, when the data in the first priority buffer is transmitted N times (three times in the example shown in FIG. 6) with priority, the data in the second priority buffer is transmitted to the S first buffer.
The signal data having the higher priority is sequentially transmitted according to a certain algorithm such as transmission once (in the example shown in FIG. 6). As a result, even when transmitting signal data in the dual port RAM 201 of the communication line control unit 20, high priority signal data (call control signal data) can be preferentially transmitted, which is caused by a conventional data transmission method. The transmission delay of the call control signal due to the insertion of the operation and maintenance signal can be reduced.

[0018]

As described above, the priority data transmission method in the mobile communication system according to the present invention is used for transmitting and receiving signal data between a base station and a control station through a wired line.
Dual port RA provided as an interface for transmitting and receiving signal data between a base station and a control station
M transmission buffers are given priorities in advance, and transmission buffers to be stored are made different according to the priority of the signal data. Therefore, signal data with a high priority is stored in the transmission buffer first in a low priority order. The signal data can be transmitted earlier than the signal data, and the priority can be ensured when transmitting the data. Therefore, also at the time of data transmission, it is possible to transmit the call control signal onto the line earlier than the operation / maintenance signal, so that the transmission delay of the call control signal can be reduced, and the variation in connection time can be reduced.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating an example of a configuration of a mobile communication system.

FIG. 2 is a main control unit 10 provided in the base station modem 2.
FIG. 2 is a block diagram showing an embodiment of a configuration of a communication line controller 20.

FIG. 3 is a diagram showing a buffer structure of a dual port RAM 201 shown in FIG. 2;

FIG. 4 is a diagram showing a configuration of signal data used in the present embodiment.

FIG. 5 is a block diagram showing a main control unit 10 transmitting signal data to a communication line control unit 2
11 is a flowchart showing a procedure for transmitting data to a dual port RAM 201 of a 0.

FIG. 6 shows a dual port RAM 2 in the communication line control unit 20.
12 is a flowchart showing a procedure for transmitting signal data from the communication unit 01 to the line connection unit 205.

[Explanation of symbols]

 Reference Signs List 1 mobile station 2 base station (base station modem) 3 wired line 4 control station (line controller) 5 PSTN (public network) 6 operation monitoring console 10 main control unit 20 communication line control unit 101, 202 CPU 102, 203 ROM 103, 204 RAM 104 GAT board 201 Dual port RAM 205 Line connection unit

Claims (3)

[Claims] 1. A dual-port RAM as an interface between a main control unit and a communication line control unit of each of the base station and the control station for transmitting and receiving signal data between a base station and a control station constituting a system via a wired line. Wherein the dual port RAM includes a dual port RAM having a transmission buffer divided into a plurality of areas with a predetermined priority, and stores the signal data according to the priority of the signal data. A priority data transmission method in a mobile communication system, characterized in that the areas of the transmission buffers are different from each other, and the signal data stored in the transmission buffer of the area with a higher priority is preferentially transmitted to the wired line. Means for transmitting the signal data stored in the transmission buffer of the high priority area to the wired line by priority to the signal data stored in the transmission buffer of the high priority area; After transmitting the signal, the signal data stored in the transmission buffer of the low priority area is transmitted S times (N and S are N> S, each of which is an integer selected according to the content of each signal data). 2. The priority data transmission method in a mobile communication system according to claim 1, wherein the priority data transmission method is performed. 3. The signal data stored in the transmission buffer of the high priority area is call control signal data, and the signal data stored in the transmission buffer of the low priority area is operation and maintenance signal data. 3. A priority data transmission method in a mobile communication system according to claim 1 or 2.