JPH118881A - Congestion control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce processing in an exchange station and to improve the efficiency of frequencies. SOLUTION: When congestion of call channels is recognized, a redialing part 11b detects a redialing identifier in a transmission signal from a calling terminal 2 through a control signal transmission/reception part 12. In the case of the call signal by redialing, the control signal transmission/reception part 12 transmits a redial regulation signal with a response signal. The calling terminal 2 invalidates a redial key in a redial key control part 2a. The redialing part 11b adds a terminal number and an opposite dial number in the registration list of a memory part 13. When the release of congestion is recognized, the control signal transmission/reception part 12 gives information on a radial regulation release signal. The calling terminal 2 informs a user of the release of regulation in a regulation state display part 2b. When the user requests redialing, the calling terminal 2 transmits a radial signal. The redialing part 11b reads the terminal number and the opposite dial number from the memory part 13 and dials to the exchange.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

[0001] The present invention relates to congestion control in mobile communication.

[0002]

2. Description of the Related Art Conventionally, this type of congestion control system, as disclosed in, for example, Japanese Patent Laid-Open No. 6-69860, transmits a broadcast channel from a base station in accordance with a change in the radio channel usage rate of the base station. It is intended to control congestion of a wireless channel by controlling power.

FIG. 7 is an explanatory diagram showing an example of a conventional congestion control system. The base stations A1, B1, and C1 are provided with monitoring means (not shown) for monitoring the use status of the wireless channel.
When the congestion of the radio channel is detected by the monitoring means of any of the base stations (for example, B1), the transmission power of the broadcast channel of the base station is reduced. In this way, the wireless zone of the base station B1 is reduced from the dotted circle to the solid circle. Due to this reduction, the number of mobile units in the wireless zone is reduced more than before, so that there is a margin for the wireless channel to be used, and congestion of the wireless channel is prevented. When the monitoring means detects the end of congestion of the wireless channel, the wireless zone is expanded and restored to the original state by increasing the transmission power of the broadcast channel of the base station.

[0004]

In the conventional method, the wireless power of the base station is reduced by lowering the transmission power of the broadcast channel, and the overflowing mobile station is allocated to the adjacent zone. In this case, there is a problem that it cannot be applied when the adjacent zone is congested.

[0005] When a communication channel is congested and a call cannot be connected, the user usually redials. For this reason, the problem that the number of control signals due to redial increases and the exchange cannot process the control signals has not been solved.

It is therefore an object of the present invention to provide a congestion control system capable of reducing the processing of the exchange.

Another object of the present invention is to provide a congestion control method capable of increasing the frequency use efficiency.

[0008]

According to the present invention, in a congestion control system for controlling congestion of a radio channel of mobile communication, a redial identifier is given to a transmission signal by a redial operation among transmission signals transmitted from a transmission terminal. The base station device monitors the congestion of the radio channel, and when receiving a transmission signal having the redial identifier during the congestion state of the radio channel, notifies the transmission terminal of a redial restriction signal, and the transmission terminal performs the redialing. A congestion control method characterized by restricting the redial operation upon receiving a restriction signal is obtained.

Preferably, the base station device stores a dial number of a transmission signal having the redial identifier, notifies a redial control signal to the transmission terminal at the end of congestion, and receives the dial number from the transmission terminal when receiving the redial signal from the transmission terminal. Connect the communication line according to.

According to the present invention, there is provided a base station apparatus for a mobile communication system in which a redial identifier is added to a transmission signal by a redial operation among transmission signals transmitted from a transmission terminal to a radio channel, A base station apparatus comprising: means for monitoring congestion; and means for notifying the originating terminal of a redial restriction signal when a transmission signal having the redial identifier is received during a congestion state of the wireless channel. Can be

Preferably, means for storing a dial number of the transmission signal having the redial identifier, means for notifying the transmission terminal of a redial restriction signal at the end of congestion, and means for receiving the redial signal from the transmission terminal, the dial number Means for connecting a communication line in accordance with the method.

According to the present invention, there is provided a mobile device comprising: means for giving a redial identifier to a transmission signal generated by a redial operation among transmission signals; and means for restricting the redial operation when a redial restriction signal is received. An originating terminal for a communication system is obtained.

Preferably, there is provided means for displaying the restriction of the redial operation in accordance with the redial restriction signal.

[0014]

Next, embodiments of the present invention will be described in detail with reference to the drawings.

[1] Description of Configuration Referring to FIG. 1, the first embodiment of the present invention is applied to a mobile communication system including a base station device 1 and a calling terminal 2. The base station apparatus 1 includes a control unit 11 that operates under program control, a control signal transmitting and receiving unit 12 that transmits and receives control signals, a memory unit 13 that stores information, and a timer unit 14.

The control unit 11 includes a traffic channel congestion monitoring unit 1
1a, a redial processing unit 11b, and a channel assignment 11c.

The redial processing unit 11b detects a redial identifier in a transmission signal from the transmission terminal 2 through the control signal transmission / reception unit 12 when the occurrence of traffic channel congestion is confirmed by the traffic channel congestion monitoring unit 11a. If the signal is a redial transmission signal, the memory unit 13
Add the terminal number and the destination dial number to the registration list of. After the congestion is released, when a redial signal is received through the control signal transmission / reception unit 12, the terminal number and the destination dial number are read from the control signal memory unit 2 and dialed to the exchange.

The control signal transmission / reception unit 12 detects a redial identifier in a transmission signal of the transmission terminal 2 and notifies a redial restriction by a response signal. After releasing the congestion of the call channel,
The redialing restriction is released on the notification channel, and a redial signal is received.

The memory unit 13 stores a terminal number and a redial number as a set in a registration list.

The timer section 14 starts operating when the congestion is released, and clears the registration list in a fixed time.

The originating terminal 2 includes a redial key control unit 2a
And a regulation state display section 2b and a timer section 2c. The redial key control unit 2a includes the control signal transmitting / receiving unit 1
2 receives a redial restriction / release signal, and controls the redial key.

The regulation status display section 2b notifies the user of the regulation status by displaying or the like.

The timer section 2c starts operating upon receiving the restriction release signal, and invalidates the redial signal for a predetermined time.

[2] Description of Operation Next, the operation of the embodiment of the present invention will be described with reference to FIGS. 1, 2, 3 and 4.

FIG. 2 is a signal diagram between the base station and the calling terminal. FIG. 3 is a flowchart of the base station apparatus, and FIG. 4 is a flowchart of the calling terminal. When occurrence of traffic channel congestion is confirmed by the traffic channel congestion monitoring unit 11a (S301), the redial processing unit 11b detects a redial identifier in a transmission signal from the transmission terminal 2 through the control signal transmission / reception unit 12 (S302). ). If the signal is a redial transmission signal (S303), the redial processing unit 11b adds the terminal number and the destination dial number to the registration list in the memory unit 13 (202 and S304). The control signal transmitting / receiving unit 12 transmits a redial restriction signal as a response signal (203 and S305).

The terminal 2 (S
402), the redial key is invalidated in the redial key control unit 2a (S403). Regulation status display section 2
b notifies the user of the regulation state by display or the like (S40).
4).

When the release of the congestion of the communication channel is confirmed by the communication channel congestion monitoring unit 11a (S306),
The redial processing unit 11b broadcasts the restriction release signal on the broadcast channel through the control signal transmitting / receiving unit 12 (204 and S308), and the timer unit 14 starts operating (S30).
7).

The transmitting terminal (S405) receives the redial control by the redial key control unit 2a, and the restriction status display unit 2b notifies the user of the restriction release by display or the like (S406). At the same time, timer section 2c
Starts operating (S407). When the user requests a redial (S408), the calling terminal 2 transmits a redial signal (205 and S409), and the timer unit 2c invalidates the redial signal (S411).

The redial signal is received through the control signal transmission / reception section 12 (S309). The redial processing section 11b
Reads the terminal number and the destination dial number from the memory unit 2 and dials the exchange (206, 207 and S310). Channel assignment 113 assigns a channel to calling terminal 2. The memory unit 13 cancels the terminal number to which the channel is assigned and the destination dial number from the registration list (208 and S312).

The timer unit 14 clears the registration list of the memory unit 2 when a predetermined time (for example, 5 minutes) has elapsed since the release of the congestion of the communication channel is confirmed (S311) (S312).

When a certain time (for example, 5 minutes) has elapsed since the reception of the restriction release signal (S4),
10), the redial signal is invalidated (S411).

FIG. 5 shows an example of a call signal (redial) and a redial signal. The redial signal does not need to include the other party's dial number required for the outgoing call signal, and can suppress the signal amount in the wireless section.

[3] Description of Another Embodiment A second embodiment of the present invention will be described focusing on its operation.

Steps S301-S303, S3 in FIG.
Since 05-S312 is the same as that of the first embodiment, the description is omitted. In the first embodiment, congestion control is performed only when a redial transmission signal is received during congestion. In this embodiment, when a dialing signal is received, the redial processing unit 11B compares whether the terminal number exists in the registration list of the memory unit 13 (S501). If the terminal number does not exist, the terminal number and the destination dial number are added to the registration list (S502).

[0035]

The first effect is that the processing of the exchange can be reduced by restricting the congestion of the control channel. The reason is that by providing a redial identifier in the outgoing signal, if a redialing outgoing signal is received at the time of congestion, the base station notifies a redial restriction by a response signal.

The second effect is that signals related to redialing can be reduced, and the efficiency of frequency use can be increased. The reason is that by using a redial signal, it is possible to propagate between radios with a smaller signal amount than in the case of a dial number (15 digits) in the case of a call.

The third effect is that, according to the second embodiment,
It is possible to release the congestion earlier than the congestion regulation limited to the redial signal, and to further reduce the processing of the exchange. The reason is that, by providing the memory unit, the base station compares whether or not the terminal number exists in the registration list of the memory unit, and also performs redial control even when a dialing signal is received.

[Brief description of the drawings]

FIG. 1 is a block diagram of a mobile communication system including a base station device and a calling terminal to which a congestion control method according to the present invention is applied.

FIG. 2 is a signal diagram for explaining the operation of the congestion control method according to the present invention.

FIG. 3 is a flowchart for explaining the operation of the base station apparatus of the congestion control method according to the present invention.

FIG. 4 is a flowchart for explaining the operation of the calling terminal of the congestion control method of the present invention.

FIG. 5 is a diagram for explaining an embodiment of a congestion control method according to the present invention.

FIG. 6 is a flowchart for explaining another embodiment of the congestion control method of the present invention.

FIG. 7 is a diagram for explaining a conventional congestion control method.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Base station apparatus 11 Control part 11a Communication channel congestion monitoring part 11b Redial processing part 11c Channel allocation 12 Control signal transmitting and receiving part 13 Memory part 14 Timer part 2 Sending terminal 2a Redial key control part 2b Regulation state display part

Claims (6)

[Claims] In a congestion control method for controlling congestion of a radio channel of mobile communication, a transmission signal generated by a redial operation among transmission signals transmitted from a transmission terminal is provided with a redial identifier. Monitoring congestion, when receiving a transmission signal having the redial identifier during the congestion state of the wireless channel, notifies the transmission terminal of a redial restriction signal, and the transmission terminal restricts the redial operation upon receiving the redial restriction signal. A congestion control method. 2. The base station device stores a dial number of a transmission signal having the redial identifier, notifies a redial control signal to the transmission terminal at the end of congestion, and receives a redial signal from the transmission terminal to change the dial number. The congestion control method according to claim 1, wherein a communication line is connected accordingly. 3. A base station apparatus for a mobile communication system in which a redial identifier is added to a transmission signal generated by a redial operation among transmission signals transmitted from a transmission terminal to a radio channel, and means for monitoring congestion of the radio channel. And a means for notifying the originating terminal of a redial restriction signal when a transmission signal having the redial identifier is received during a congestion state of the wireless channel. 4. A means for storing a dial number of a transmission signal having the redial identifier, a means for notifying a redial control signal to the transmission terminal at the end of congestion, and receiving a redial signal from the transmission terminal, 4. The base station apparatus according to claim 3, further comprising means for connecting a communication line. 5. A mobile communication system, comprising: means for giving a redial identifier to a transmission signal generated by a redial operation among transmission signals; and means for restricting the redial operation when a redial restriction signal is received. Calling terminal. 6. The originating terminal for a mobile communication system according to claim 5, further comprising means for displaying a restriction on said redial operation in response to said redial restriction signal.