JP2557892B2 - Incoming and outgoing call control method for mobile communication system - Google Patents

Description

Description: [Object of the invention] (Industrial field of application) The present invention relates to a method of controlling incoming and outgoing calls of a mobile communication system having a plurality of mobile radios moving in a plurality of radio zones. .

(Prior art) Conventionally, a wireless zone (or service area)
There is a mobile communication system in which a plurality of fixed wireless devices are arranged so as to partially overlap each other, and communication is performed between a mobile wireless device moving in each wireless zone and a wired telephone line.

FIG. 2 is a system block diagram showing a conventional configuration of this type of mobile communication system. In FIG. 2, 3a to 3e are mobile wireless devices, 41 to 43 are fixed wireless devices, 51 to 53 are wireless zones, 6a to 6e are wired telephone lines, and 7 is a line control device. Where 3a is 6a, 3b is 6b, 3c is 6c, and 3d is
6d and 3e correspond to 6e, respectively. Also, 51-53
It is a wireless zone covered by fixed radios 41-43, respectively.

First, the line connection operation will be described. Wired telephone line
When there is an incoming call to 6a, the line controller 7 activates the fixed wireless device 41 in the wireless zone 51 where the mobile wireless device 3a corresponding to the line 6a is present, and causes the fixed wireless device 41 to transmit an incoming call signal. Upon receiving the incoming call signal, the mobile radio 3a sounds a sounder to notify the user. When the user responds by off-hook, the mobile wireless device 3a returns a response signal to the line control device 7 via the fixed wireless device 41. The line control device 7 detects this and connects the wired line 6a to the fixed radio device 41,
And the mobile wireless device 3a can communicate with each other.

On the other hand, when the user sends a call signal from the mobile wireless device 3a to the line control device 7 via the fixed wireless device 41, the line control device 7 connects the wired telephone line 6a and the fixed wireless device 41, and Allows outgoing calls to the telephone network.

By the way, when the line control device 7 sends an incoming call signal to the mobile radio device 3a via the fixed radio device 41 when an incoming call is made to the wired telephone line 6a, the line control device 7 must be a mobile radio device.
It is necessary to know in advance that the predetermined position of 3a is the wireless zone 51.

Similarly, in order to send a calling signal from the mobile wireless device 3a to the line control device 7 via the fixed wireless device 41, the mobile wireless device 3a needs to know in advance that its predetermined position is the wireless zone 51. You need to know.

Therefore, the line controller 7 detects the predetermined positions of the mobile radios 3a to 3e as follows. That is, the line control device 7 gives the transmission instruction signal of the position notification signal to the fixed radios 41 to 43 while shifting the time, and the position notification signal from each of the fixed radios 41 to 43 and the fixed radio unique to each fixed radio. The identification signal is transmitted so that the transmission timings do not overlap. Then, the position notification signal and the identification signal are received only for the mobile radio located in the radio zone of each fixed radio.

For example, when the mobile wireless device 3a is present at the position shown by the broken line, the mobile wireless device 3a receives only the identification signal and the position notification signal from the fixed wireless device 43. Recognize that the wireless zone 53 exists. Therefore, the mobile wireless device 3a transmits a position registration signal including the identification signal of the fixed wireless device 43, and registers the position of the wireless zone in which the mobile wireless device 3a exists in the line control device 7 via the fixed wireless device 43.

On the other hand, when the mobile wireless device 3a moves as indicated by the arrow, it receives the identification signal and the position notification signal from the fixed wireless devices 41 and 42, but cannot receive the identification signal and the position notification signal from the fixed wireless device 43. Therefore, the mobile wireless device 3a recognizes that the mobile wireless device 3a exists in the wireless zones 51 and 52 of the fixed wireless devices 41 and 42, and performs location registration with respect to the line control device 7 in the same manner as described above. . As described above, the line control device 7 recognizes in which wireless zone each of the mobile radios 3a to 3e exists, and furthermore, each of the mobile radios 3a to 3e.
Can recognize which wireless zone he or she is in.

By the way, since an incoming call from a wired telephone line and an outgoing call from each mobile wireless device are performed without being aware of each other, both the incoming call and the outgoing call via the same fixed wireless device are almost at the same time. If so, the collision occurs.

For example, by the position registration operation described above, the mobile wireless device 3a
.About.3e and the fixed radios 41 to 43 have the corresponding relations shown in Table 1 below.

In this relationship, (1) there is an incoming call to the wired telephone line 6a, and the incoming call operation is started using the fixed wireless device 41 to call the mobile wireless device 3a (or the incoming to the wired telephone line 6b). Then, the fixed wireless device 41 is used to call the mobile wireless device 3b and the incoming call operation is started. (2) The user of the mobile wireless device 3a performs a call operation to the fixed wireless device 41. When two states, that is, the state in which the call signal is started to be transmitted (or the state in which the user of the mobile wireless device 3b performs the call operation and the start to transmit the call signal to the fixed wireless device 41) occur almost at the same time In the connection processing sequence of the line control device 7 or the fixed wireless device 41, the processing for the outgoing call and the processing for the incoming call collide. That is, if the incoming call is made to the wired telephone line 6a while the connection process for the outgoing call of the mobile wireless device 3a (or 3b) is progressing at the stage of the line connection with the line control device 7, the line control device 7
A collision between an outgoing call and an incoming call occurs in the connection processing sequence.
Conversely, the incoming call processing for the wired telephone line 6a is performed by the fixed wireless device 41.
If a call is made from the mobile wireless device 3a (or 3b) while the line connection stage with the mobile wireless device 3a (or 3b) is being performed, a collision between the call and the incoming call occurs in the connection processing sequence of the fixed wireless device 41.

FIG. 3 (a) shows a call originating from the mobile radio 3b and a wired telephone line.
FIG. 6 is a sequence diagram showing a conventional outgoing / incoming call control method in the case where an incoming call from 6a occurs at approximately the same time and a collision occurs in the connection processing sequence of the line control device 7, when an off-hook operation is performed in the mobile wireless device 3b. A call signal is transmitted from the mobile wireless device 3b to the fixed wireless device 41. The fixed radio 41 indicates a channel for a call in response to this call signal, and when the channel switching completion signal is returned from the mobile radio 3b, a line with the line control device 7 should be formed. The loop closing signal is transmitted to the line controller 7. Then
The line control device 7 returns a response signal, and causes the fixed wireless device 41 to transmit a calling signal including the identification signal of the mobile wireless device 3b. When the call signal is received, the line is connected to the wired telephone line 6b, while the response signal is returned and the mobile wireless device 3b transmits the dial signal.

The process for the outgoing call of the mobile wireless device 3b proceeds in this way, but the fixed wireless device 41 and the line control device 7 in the middle of this process are performed.
Immediately after the line is connected for the first time, when an incoming call is made to the wired telephone line 6a as indicated by the broken line, the line control device 7 sends the identification signal of the mobile wireless device 3b from the fixed wireless device 41. When the identification signal is sent by waiting until the arrival, the identification number of the mobile wireless device 3a to be called by the incoming call of the wired telephone line 6a and the mobile wireless device 3b sent from the fixed wireless device 41. Check with the identification number. As a result,
Since the two are different, the line control device 7 uses the fixed wireless device 42 for the incoming call from the wired telephone line 6a.
Change the connection path on the called side to call 3a.

FIG. 3 (b) shows a call originating from the mobile radio 3a and a wired telephone line.
FIG. 6 is a sequence diagram showing a conventional incoming / outgoing call control method in the case where an incoming call from 6b occurs almost at the same time and a collision occurs in the connection processing sequence of the fixed wireless device 41, and the line control device 7 operates from the wired telephone line 6b. When the 16HZ incoming signal is received, a polarization signal is transmitted to the fixed wireless device 41 to perform a line connection operation with the fixed wireless device 41. At this time, the mobile wireless device 3a has already called. Since the fixed wireless device 41 transmits a loop closed signal to the line control device 7, the fixed wireless device 41 transmits the identification signal of the mobile wireless device 3b corresponding to the wired telephone line 6b from the line control device 7. Wait by waiting process,
If the identification signal of the mobile wireless device 3b is transmitted, it is collated with the identification signal of the mobile wireless device 3a in the calling state. As a result,
Since the two are different, priority is given to incoming calls from the wired telephone line 6b. That is, the fixed radio 41 is preferentially used for an incoming call from the wired telephone line 6b, and the mobile radio 3b is called via the fixed radio 41 for an incoming call from the line 6b,
Further, a call stop signal is transmitted to the mobile radio device 3a so that a busy tone can be heard.

If the incoming call and the outgoing call are targeted for the same mobile wireless device, only the processing for the incoming call is performed.

(Problems to be Solved by the Invention) As described above, in the conventional case, the identification number of the mobile radio device is collated with respect to the collision between the outgoing call and the incoming call. Is called by another route, or the call is canceled.

Therefore, the line control device and the fixed wireless device must be prepared to wait until the identification number of the mobile wireless device is transmitted, which complicates the control sequence and completes the connection. There is a problem that the time becomes long, the call processing efficiency of the system is lowered, and as a result, the cost is increased and the serviceability to the user is lowered.

An object of the present invention is to provide a departure / arrival control method for a mobile communication system capable of advancing connection processing in the event of a collision between an outgoing call and an incoming call without inviting an increase in cost and a decrease in serviceability.

[Structure of the Invention] (Means for Solving the Problems) The present invention determines a collision between an outgoing call and an incoming call by determining whether or not a fixed radio that relays the outgoing call and the incoming call is in use. In addition, the connection processing for the outgoing call and the incoming call is performed by giving priority to the connection processing on the side of the line control device.

(Operation) When a collision between an outgoing call and an incoming call occurs in the connection processing sequence of the line control device, use of whether or not the fixed radio that relays the outgoing call and the incoming call has already transitioned to the connection processing sequence The state is determined, and if it is already in use, it is determined that a collision has occurred, and the mobile radio is called for an incoming call via another fixed radio. On the other hand, when a collision occurs in the connection processing sequence of the fixed wireless device, the connection processing on the line controller side is prioritized and the processing for the outgoing call is stopped.

(Embodiment) FIG. 1 is a sequence diagram of an incoming / outgoing call operation showing an embodiment of the present invention, and FIG. 1 (a) shows a collision between an outgoing call and an incoming call in the connection processing sequence of the line controller 7. FIG. 6B shows the operation in the case where a call origination and an incoming call collide with each other in the connection processing sequence of the fixed wireless device 41. Further, FIG. 7C shows the operation when the call origination and the call reception are the same mobile radio and a collision occurs in the connection processing sequence of the line control device 7.

First, referring to FIG. 1A, here, after a call is made from the mobile wireless device 3b through the fixed wireless device 41,
Although the case where an incoming call is received on the wired telephone line 6a is shown, the line control device 7 performs an incoming call operation to the mobile wireless device 3a via the fixed wireless device 41 in response to an incoming call from the wired telephone line 6a. Trying to move. However, at this time, the loop closed signal is sent from the fixed wireless device 41, and the fixed wireless device 41 is in use after shifting to the connection processing sequence for the call originating from the mobile wireless device 3b. Therefore, the line control device 7 is a fixed radio device.
The mobile wireless device 3a via the fixed wireless device 42 based on only the determination result that the fixed wireless device 41 is in use without considering which mobile wireless device 41 has moved to the connection processing. The operation shifts to the incoming call operation.

Therefore, it is not necessary to wait until the identification signal of the mobile wireless device 3b is sent, and the connection delay due to the waiting process is also eliminated.

Next, in FIG. 1B, the line control device 7 tries to start an incoming call operation to the mobile wireless device 3b via the fixed wireless device 41 by an incoming call from the wired telephone line 6b. A call signal is transmitted from the mobile wireless device 3a to the fixed wireless device 41, causing a collision between the outgoing call and the incoming call. Therefore, whether the fixed wireless device 41 is the mobile wireless device 3a to be called,
Mobile radio without checking the called party
After stopping the processing for the call of 3a, the line control device 7
Priority is given to the connection process of (1), and the call operation to the mobile wireless device 3b is started.

In this case as well, since the identification number of the mobile wireless device is not verified, it is not necessary to provide waiting processing for the fixed wireless device 41, and therefore connection delay does not occur.

Next, FIG. 1 (c) shows a case where an incoming call from the wired telephone line 6a and an outgoing call of the mobile radio 3a collide with each other in the connection processing sequence of the line control device 7. Since the fixed wireless device 41 is already in use when the device 7 receives an incoming call on the line 6a, the mobile wireless device 3a is connected via the fixed wireless device 42 as in the case of FIG. 1 (a). The operation shifts to the incoming call operation. On the other hand, the fixed wireless device 41 sends an identification signal of the mobile wireless device 3a thereafter, but since the incoming call operation is proceeding to the mobile wireless device 3a through a different route, the line control device 7 A signal for rejecting the connection process for the calling is transmitted to the fixed wireless device 41 to stop the calling of the mobile wireless device 41.

[Effects of the Invention] As is apparent from the above description, according to the present invention, a collision between an outgoing call and an incoming call is determined based on the usage state of the fixed radio and priority is given to the connection process on the line controller side. Therefore, it is not necessary to prepare a waiting process until the identification signal of the mobile wireless device is sent to the line control device and the fixed wireless device. As a result, it is possible to deal with the collision between the outgoing call and the incoming call without increasing the cost and delaying the connection, and it is possible to obtain the effect of improving the call processing efficiency and the service to the user.

[Brief description of drawings]

FIG. 1 is a sequence diagram of an outgoing / incoming call operation showing an embodiment of the present invention, FIG. 2 is a block diagram showing a general configuration of a mobile communication system, and FIG. 3 is a sequence diagram showing a conventional outgoing / incoming call operation. . 3a-3e: Mobile radio, 41-43: Fixed radio, 51-53
… Wireless zone, 6a to 6e… Wired telephone line, 7… Line control device.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Tomio Ishikawa 1-3-1, Asahigaoka, Hino-shi, Tokyo Inside Toshiba Hino Plant, Ltd. (72) Inventor Yukihiro Sako 1-chome, 3-chome, Asahigaoka, Hino, Tokyo Company Toshiba Hino Factory (56) References JP-A-62-155695 (JP, A)

Claims (1)

(57) [Claims] 1. A plurality of mobile wireless devices, a plurality of fixed wireless devices that form a wireless line between these mobile wireless devices, and a connection between these fixed wireless devices and a plurality of wired telephone lines. In a call origination / receipt control method of a mobile communication system including a line controller for forming a communication path between a mobile radio and a wired telephone line, a call origination from the wired telephone line and an incoming call from the mobile radio unit are performed. The collision is determined by whether or not the fixed radio that relays the outgoing call and the incoming call is in use, and the connection processing for the outgoing call and the incoming call is given priority over the connection processing on the line controller side. A method for controlling incoming / outgoing calls in a mobile communication system.