JPH05167492A - Method and equipment for traffic management - Google Patents

Abstract

PURPOSE:To prevent excess wait time from being given to a caller station by relieving a processing load in a stationary station side equipment and in the traffic management method in the mobile body communication system utilizing a radio wave. CONSTITUTION:A stationary station side equipment counts a traffic number, and when the traffic number reaches a traffic number in excess of a processing capability of the stationary station side equipment, a general notice signal to a mobile station is set negative to reject a call from the mobile station. The stationary station side equipment is provided with a means 21 deciding a receptible call number within a prescribed time based on a call reception processing limit condition, a means 22 counting a call number caused within a prescribed time, and a means 23 sending a general notice negative signal rejecting a call of the mobile station when the call number counted by the count means 22 exceeds the receptible call number.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a traffic management method in a mobile communication system using radio such as a car phone and a mobile phone, and a fixed station side device such as a line control device for performing the traffic management method. It is a thing.

In recent years, mobile communication systems have made remarkable progress. Along with that, traffic has increased,
Since the processing limit of the system may be exceeded and calls may be disconnected even if accepted, it is necessary to manage traffic appropriately.

[0003]

2. Description of the Related Art FIG. 5 shows a line control device for a simple mobile telephone. In FIG. 5, 1C is a control channel board for controlling connection with a mobile device, 1S is a communication channel board for performing connection processing with a mobile device, 2 is a message distribution / transmission process between the channel board 1 and the main control panel 3, etc. Channel control panel to perform 3
Is a main control panel that performs call connection processing, 4 is an I / O control panel that distributes messages to each CPU board, 5 is a maintenance interface board that performs interface processing with a maintenance desk, and 6 is billing that performs interface processing with a billing system Interface board,
Reference numeral 7 is a supervisory control interface board that performs interface processing with the supervisory system, 8 is a billing system, 9 is a supervisory system, 10 is a maintenance table for maintaining and controlling the state of the entire system, and 11 is a mobile device.

Here, the main control panel 3 allocates the communication channels # 2 to #n, and the two channel control panels 2 and 2 are connected via the HDLC line.
The channel control board 2 includes channel boards 1 # 1 to 1 # 16.
However, the channel control board 2 has channel boards 1 # 17-1 #
32 is connected via the HDLC line, and HDL
The A channel portion of C is 8 pieces of upper channel boards (# 1 to # 8 for channel control board 2), and the B channel portion is 8 pieces of lower channel board (# 9 to # 16 of channel board 1 for channel control board 2). ) Is polled.

The channel control board 2 distributes a message from the main control board 3 to each channel board 1 and transmits a message from the channel board 1 to the main control board 3. Channel board 1 is mobile 1
The connection process between the 1 and the line exchange is performed.

The main control board 3 polls the channel control boards 2 and 2 at 100 mS intervals. Therefore, when viewed from one channel control panel (2 or 2), 2
Main control panel 3 at intervals of 00mS (ie 100mS x 2)
Perceived as being polled from. The channel control board 2 polls the eight subordinate channel boards 1 at 70 mS intervals. Therefore, when viewed from one channel board 1 under it, 560 mS (70 mS
X8) It is recognized as being polled from the channel control board 2 at intervals.

FIG. 6 shows a calling sequence when the radio network controller is operating normally. In FIG. 6, the control channel board 1C normally sends a message of "general notification",
The mobile device 11 waits for a call signal to be transmitted. When the mobile station 11 receives the message of the general notification “OK”, it sends a call signal if there is a call at the terminal. When the control channel board 1C receives the call-out signal, it sends a call-out response twice to the mobile station 11, checks the system code of the received call-out signal, etc., and if the check result is OK, the channel control board 2 is displayed. A call notification is sent to the main control panel 3 via the route. At that time, the control channel board 1C sets the channel-specified call waiting timer to 40 seconds.

After checking the subscriber registration, the main control panel 3 searches for a vacant channel from the call channel boards 1S-2 to 1S-n, and if there is a vacant call channel board, requests the call channel allocation request. It is transmitted to the corresponding call channel board 1S through the control board 2. Upon receiving this, the speech channel board 1S closes the loop on the exchange side and transmits an allocation OK to the main control board 3.

The main control panel 3 sends a call response and a channel-specified call request to the control channel panel 1C via the channel control panel 2 (a symbol designating the radio frequency of the assigned call channel panel 1S).
To send a loop check request to establish a link to the call channel board 1S. Control channel board 1
C cuts off the channel-specified call waiting timer,
The channel designation signal is transmitted twice to the mobile station 11, and the mobile station 11 tunes the radio frequency to the designated frequency of the received channel designation signal.

On the other hand, at this time, when the control channel board 1C cannot receive the channel-designated call request and the channel-designated call waiting timer times out, as shown in FIG. And the main control board 3 sends a disconnection request to the control channel board 1C in response to
As a result, the control channel board 1C transmits the disconnection signal to the mobile device 11 twice, and the call is terminated.

The call channel board 1S transmits the loop check request previously received from the main control board 3 to the mobile station 11 40 times. At this time, the call channel board 1S sets the loop check response waiting timer to 7 seconds. The mobile device 11 transmits a loop check response to the call channel board 1S. Upon receiving this loop check response, the call channel panel 1S timer cuts the loop check response wait timer, sends a loop check OK to the main control panel 3, dials out and connects to the general subscriber telephone network (PSTN) side.

If the call channel board 1S cannot receive the loop check response, the loop check response waiting timer times out, and the loop check NG is transmitted to the main control panel 3. In response to this, the main control panel 3 sends a disconnection request to the call channel board 1S, and in response to this, the call channel board 1S sends a disconnection request signal to the mobile station 11, and the call ends.

FIG. 8 shows an incoming call sequence when the line control device is normal. The call channel board 1S that has received the incoming call signal from the general subscriber telephone network closes the loop, and after receiving the second dial, sends an incoming call notification to the main control board 3. The main control board 3 transmits a channel-designated incoming call signal (a signal designating the radio frequency of the communication channel board 1S) to the control channel board 1C. Upon receiving this, the control channel board 1C transmits the channel designation signal to the mobile device 11 twice. When the mobile station 11 receives the channel designation signal, it adjusts the used radio frequency to the designated frequency of the channel designation signal.

The main control board 3 sends a loop check ringer request to the call channel board 1S. Receiving this, the call channel board 1S transmits a loop check signal to the mobile device 11 40 times. At this time, call channel board 1S
Sets the loop check response wait timer to 7 seconds.

When the mobile station 11 receives the loop check signal, it sends a loop check response to the call channel board 1S. When the call channel board 1S receives this loop check response, the timer for the loop check response wait timer is cut off, and then a loop check OK is sent to the main control board 3 and at the same time a ringer activation request signal is sent to the mobile station 11. , Connect to the general subscriber telephone network side.

On the other hand, although the loop check signal is transmitted from the call channel board 1S, the mobile station 11
When the power is off, the loop check response cannot be transmitted, so the loop check response waiting timer of the communication channel board 1S times out. In this case, the call channel board 1S sends an out-of-service talkie to the general subscriber telephone network side.
It is output for a second, and after the lapse of 20 seconds, the general subscriber telephone network side is disconnected and the call ends.

[0017]

The polling time from the main control panel 3 to the channel control panel 2 is 200 mS (= 100 mS × 2) intervals as viewed from the channel control panel 2, while the channel control panel 2 To control channel board 1C from 560 mS (= 70 mS x
8) It is an interval, and there is a difference between the two.

Therefore, the main control panel 3 and the channel control panel 2
Or channel control panel 2 and control channel panel 1
Suppose that telegrams are transmitted at a rate of 1 per poll between Cs, and if there are many telegrams to be transmitted due to consecutive call / incoming calls, the channel is Telegrams for the control channel board 1C gradually accumulate in the control board 2.

As a result, the telegram of the channel-designated call for the later-generated call is stored in the channel control panel 2 and is not easily transferred from the channel control panel 2 to the control channel panel 1C. Therefore, the control channel panel 1C In some cases, the channel-specified call waiting timer (40 seconds) for the call is timed out and the call ends.

As described above, even if the call is once accepted, the call may be disconnected after that, which causes the caller to wait an extra time and cause discomfort. It will be.

Further, the control channel board 1 is replaced by the control channel board 1
When messages for C, especially channel-specified outgoing calls, gradually accumulate, the following problems occur in addition to the timeout of the channel-specified outgoing call waiting timer (40 seconds). This will be described with reference to the loop check NG sequence of FIG. Since the main control board 3 has transmitted the channel-designated call, it sends a loop check request to the call channel board 1S of # 9, for example. Since there are no transmission messages for the call channel board, this loop check request is immediately sent to call channel 1S # 9. The call channel board 1S of # 9 transmits a loop check request to the mobile device and sets a response waiting timer (7 seconds). However, since there are many messages from the channel control panel 2 to the control channel panel 1C, the mobile station has not yet received the channel-designated call signal via the control channel. Therefore, the loop check request from the call channel board 1S of # 9 cannot be received, so that the loop check waiting timer (7 seconds) of the call channel board 1S of # 9 times out. The time-out # 9 speech channel board 1S sends a loop check NG to the main control board 3. The main control board 3 sends a disconnection request to the # 9 call channel board 1S, and the # 9 call channel board 1S is released. After that, the mobile station receives a channel-specified call via the control channel and sets the loop check request waiting timer (6 seconds) after receiving it, but since the loop check has already been sent, this loop check request The wait timer eventually times out, and due to this timeout or due to a disconnection request, the mobile station returns the frequency to the control channel, and the call connection fails.

The present invention has been made in view of the above circumstances, and is based on the concept that unnecessary processing in the device is not performed by determining a call that times out and excluding it from the processing target in advance. It is an object of the present invention to reduce the processing load in the system and not to give an extra waiting time to the calling station.

[0023]

FIG. 1 is a diagram for explaining the principle of the present invention. A traffic management method of the present invention is a method for managing traffic in a mobile communication system, wherein the number of traffics is counted in a fixed station side device, and when the number of traffics exceeds the processing capacity of the fixed station side device. , The general broadcast signal to the mobile station is "No"
As a result, the call from the mobile station is rejected.

The fixed station side device of the mobile communication system of the present invention comprises means 21 for determining the number of calls that can be accepted within a predetermined time based on the call reception processing limit condition, and the number of calls that occur within this predetermined time. And a means 23 for transmitting a general notification "no" signal for rejecting the call from the mobile station when the number of calls counted by the counting means 22 exceeds the number of calls that can be accepted. It is a thing.

[0025]

When the occurrence of a call exceeds the processing limit of the fixed station side device, this is detected by the call number counting means 22 and the transmitting means 23 transmits a general notification "no" signal. While this general notification signal is "No", the mobile station cannot make a call, and as a result, the occurrence of a call that is recognized in advance as being disconnected even if the fixed station device exceeds the processing limit, that is, when it is accepted. This can be prevented in advance, and thus the load in the device can be reduced.

[0026]

Embodiments of the present invention will be described below with reference to the drawings. This embodiment is applied to the line control device of the simplified type mobile telephone shown in FIG. In this embodiment, the call reception processing limit of the channel control panel 2 is set in advance to determine how many times per second the traffic can be handled by the line control device, and when the traffic exceeds this ratio, the line control is performed. From the device, the general notification "no" signal for rejecting the call from the mobile device is sent to the mobile device 11 side a predetermined number of times to stop the call from the mobile device, and the general notification "no" signal is sent. In the meantime, the traffic load accumulated inside the device is processed, and after the load processing, the general notification “OK” signal for permitting the call from the mobile device 11 is sent again.

The calling information processing limit of the channel control panel 2 and the number of times of sending the general notification "NO" signal are obtained as follows. First, the ratio of the outgoing call from the mobile device 11 side to the incoming call to the mobile device 11 in the line control device is the incoming call “3” to the outgoing call “9” in the actual measurement value of the field.
Based on this call ratio, the ratio of various messages from the main control panel 3 to the channel control panel 2 and the ratio of various messages from the channel control panel 2 to the control channel panel 1C are obtained during call processing in the line control device. And becomes as follows.

First, as can be seen from the calling sequence of FIG. 6, the message ratio from the main control panel 3 to the channel control panel 2 is as follows: call response message 9 (from call 9): channel designation message 12 (call Call 9 and call 3): Loop check request 12 (call 9 and call 3). The telegram ratio from the channel control panel 2 to the control channel panel 1C is: call response 9 (by call 9): channel designation message 12 (by call 9 and call 3). Figure 3
Shows the telegram ratio.

Here, it is assumed that if 10 or more messages for the control channel board 1C are stored in the channel control board 2, calls received after that will be delayed in processing and must be disconnected. Is the limit of the call reception processing of the channel control board 2.

The polling interval in the line controller is
As shown in FIG. 2, the polling interval from the main control panel 3 viewed from the channel control panel 2 is 200 mS, the polling interval from the channel control panel 2 viewed from the control channel panel 1C is 560 mS, and from the control channel panel 1C. It is assumed that electronic messages are transmitted to the mobile device 11 one by one at 200 mS intervals.

Assuming that the time for which 10 telegrams for the control channel board 1C are accumulated in the channel control board 2 is X (mS), the following equation is established based on the above-mentioned telegram ratio and polling interval. (21 ÷ 33) × (X ÷ 200) − (X ÷ 560) = 10 When this equation is solved, X≈7000 (mS). The number of calls that can be accepted by the line control device during the time 7,000 mS for accumulating 10 messages is determined by the polling interval 560 mS of the control channel board 1C, and 7,000 ÷ 560 = 12.5 (times). If the traffic is up to 12.5 times, the channel control panel 2 can handle the traffic without reaching the call reception processing limit.

Based on this idea, it is assumed in this embodiment that traffic can be handled up to three times in four seconds. When traffic is generated four times or more, the general notification signal sent from the control channel board 1C to the mobile station 11 is set to "no" to reject the call from any more mobile stations,
While transmitting the general notification "NO" signal, the processing of the telegram accumulated in the channel control panel 2 is completed. The number of general notification “no” signals transmitted during this period is obtained as follows.

When the number of messages for the control channel board 1C accumulated in the channel control board 2 is calculated when four or more calls are detected in 4 seconds, (21 ÷ 33) × (4000 ÷ 200)-(4000 ÷ Since 560) ≈6, 6 will be accumulated. At this time, the channel control board 2 has reached the call reception processing limit.
Until processing of the telegram of the book is completed (that is, control channel board 1
Calling from the mobile unit 11 side is prohibited until the transmission to the C side is completed. Calculating the time until these six messages are received from the channel control panel 2 to the control channel panel 1C, the polling interval to the control channel panel 1C is 560 mS. 560 × 6 = 3360 (mS) This 3360 mS When the number of telegrams that the control channel board 1C can send to the mobile device 11 is calculated, the control channel board 1C sends telegrams to the mobile device 11 side at a rate of one per 200 mS, so 3360 ÷ 200 = 16.8 ≒ 17 (book)

The number of times of transmitting the general notification “NO” signal to the mobile station 11 during the above-mentioned processing period (3360 mS) is calculated as follows. The number of channel designation telegrams stored in the channel control panel 2 is 6 × (12 ÷ 21) = 3 because the telegram ratio from the channel control panel 2 to the control channel panel 1C is the call response 9: channel designation telegram 12. It can be calculated as 4 (book). The control channel board 1C, which has received these 3.4 channel designation messages, transmits them to the mobile station 11. At this time, the control channel board 1C sends each message to the mobile station 11 twice. Since we are sending each
3.4.times.2.apprxeq.7 channel specification messages will be sent to the mobile device 11. Therefore, the processing time 336 of the above message
Of the 17 messages that can be sent to the mobile device 11 by the control channel board 1C during 0 mS, 7 are channel-specified messages, so the number of messages that can be used as the general notification "no" signal is the remaining 17 messages. -7 = 10 (book).

FIG. 4 shows a traffic management sequence of the control channel board 1C based on the above calculation result. This sequence is executed in the control channel board 1C, and when the channel control board 2 reaches the call reception processing limit (traffic of 4 times or more in 4 seconds), the 10 general broadcast "no" signals calculated above. Is sent to the mobile device 11 side.

First, when the control channel board 1C is activated (step S1), a traffic monitoring timer of 4 seconds is activated to count the traffic generation rate (step S2). When a call notification is issued after the traffic monitoring timer is activated, the call notification counter is incremented by 1 (step S3). It is monitored whether or not the value of the call notification counter is less than 4 (step S4), and when the next call is received during that time, the value of the call notification counter is further incremented by one. During this time, the traffic monitoring timer is 4
When the seconds have been counted out, the call notification counter is cleared to "0" (step S6), the traffic monitoring timer is restarted from "0", and the same processing is repeated.

Here, when the value of the call notification counter becomes "4" or more (step S4), the call notification counter is cleared to "0", and then the general notification "10" of the above calculated numbers is given. "No" signals are sequentially transmitted to the mobile station 11 including the above seven channel designation telegrams (step S
8). The mobile station 11 is prohibited from making a call until the transmission of these 10 general notification "no" signals is completed. On the other hand, since all the telegrams accumulated in the channel control panel 2 have been processed, when the 10 general notification “NO” signals have been sent, the general notification “OK” signal is sent next and the mobile station 11
Can make a call again.

Various modifications are possible in carrying out the present invention. For example, in the above-mentioned embodiment, the case where the present invention is applied to the simplified type automobile telephone system has been described, but the present invention is not limited to this, and is applicable to a mobile telephone system, a general automobile telephone system, and the like. .. Further, in the above-described embodiment, the traffic management is performed in the control channel panel of the line control device, but the present invention is not limited to this, and the occurrence of traffic exceeding the processing limit of the device is monitored in any of the fixed station side devices. However, another configuration may be used as long as it can transmit a general notification “no” signal when the time exceeds. Although the line control device of the simplified automobile telephone system is used as the fixed station side device in the embodiment, the present invention is not limited to this, and the present invention may be implemented in a base station of a general automobile telephone system, for example.

[0039]

As described above, according to the present invention, it is possible to eliminate in advance the occurrence of a call that is recognized as being disconnected even if it is accepted because it exceeds the processing limit of the line controller. As a result, the processing load of the device can be reduced, and an unnecessary waiting time is not given to the calling station.

[Brief description of drawings]

FIG. 1 is a diagram illustrating the principle of the present invention.

FIG. 2 is a diagram illustrating a polling interval of each unit for calculating a traffic limit in the embodiment.

FIG. 3 is a diagram illustrating a telegram ratio in each unit for calculating a traffic limit in the embodiment.

FIG. 4 is a diagram illustrating a management sequence on a control channel board in the embodiment.

FIG. 5 is a diagram showing a line control device of a simplified car telephone system to which an embodiment of the present invention is applied.

FIG. 6 is a diagram showing a calling sequence at a normal time in the simplified car telephone system.

FIG. 7 is a diagram showing an issuance sequence at the time of overload in a simplified car telephone system.

FIG. 8 is a diagram showing an incoming call sequence at a normal time in the simplified car telephone system.

FIG. 9 is a diagram showing a loop check NG sequence in the simplified car telephone system.

[Explanation of symbols] 1C control channel panel 1S communication channel panel 2, 2 channel control panel 3 main control panel 4 I / O control panel 5 maintenance interface panel 6 billing interface panel 7 monitoring control interface panel 8 billing system 9 monitoring system 10 maintenance Desk 11 Mobile

Claims (2)

[Claims] 1. A method for managing traffic in a mobile communication system, comprising: counting the number of traffics in a fixed station side device; and moving when the number of traffics exceeds the processing capacity of the fixed station side device. A traffic management method for rejecting a call from a mobile station by setting a general broadcast signal to the station as "no". 2. A means for determining the number of calls that can be accepted within a predetermined time based on a call reception processing limit condition, a means for counting the number of calls generated within the predetermined time, and a number of calls counted by the counting means. The fixed station side device of the mobile communication system, comprising means for transmitting a general notification "rejection" signal for rejecting the call from the mobile station when the number of calls that can be accepted exceeds the limit.