JP2514018B2 - Mobile wireless line connection method - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to reduction of connection control time for call origination / termination processing in a mobile communication system using a cordless telephone with an expanded call connection area.

FIG. 1 shows the configuration of a mobile communication system to which the present invention is applied. In connection control in the conventional mobile communication system, a wired line and a wireless line are connected / disconnected each time a call is made. FIG. 2 shows the state of connection / disconnection of the line at the time of calling. That is, when the cordless telephone goes off-hook when starting a call, the wired line and the wireless line are set with a certain delay, and both lines are held during the call. Further, when the call ended and was hooked up, the telephone line on the fixed telephone network side was immediately disconnected, and then the wired line and the wireless line were disconnected after a certain delay. In order to make a call again, it is necessary to set both lines again.

(Problems to be Solved by the Invention) Therefore, there is a drawback in that when a call is continuously made, it takes an extra control time for re-setting both lines as shown in FIG.

An object of the present invention is to provide a control method for shortening the connection time required for re-establishing a line when making a call or a call response again in a relatively short time after the end of the call. .

(Means for Solving Problems) The most main feature of the present invention is to leave both wired and wireless lines supplemented for, for example, about 1 to 10 seconds when a call is made again after the call ends. To do. It differs from the conventional method in that control time for resetting both wired and wireless lines is unnecessary.

(Example) FIG. 1 shows the configuration of a mobile communication system to which the present invention is applied. 10 is a fixed telephone network such as an exchange or PBX in a telephone office, 11 is a telephone line connected to 10, 12 is a wireless line control device, 13 is a wired line group, 14 is a wireless connection device, 15 is a wireless line, 16 is a cordless telephone.

In this configuration, the wireless line control device 12 has the following functions.

(1) A time longer than the time required for the telephone switching center (also called LS) or the private branch exchange (also called PBX) in the fixed telephone network to confirm the call termination Wired line 13 and wireless line
Function that complements 15.

(2) A function of setting the time for capturing the wired line in the item (1) and a function of instructing the wireless connection device 14 of the time for capturing the wireless line in the item (1).

(3) A function of identifying a short-time loop opening / closing signal (also referred to as a hooking signal) from the cordless telephone 16 during a call and relaying the signal to the fixed telephone network 10 to open / close the loop for a short time.

(4) The call end signal (also called an on-hook signal) from the cordless telephone 16 is relayed to the fixed telephone network 10, and the telephone line 11
(5) Sending signal (also referred to as off-hook signal) from the cordless telephone 16 to the fixed telephone network 10 while the wired line 13 and the wireless line 15 are being captured, A function to connect to the fixed telephone network 10 by relaying and closing the loop of the telephone line 11.

(6) A function of detecting an incoming signal when receiving an incoming call from the fixed telephone network 10 while capturing the wired line 13 and the wireless line 15, and relaying the incoming call signal to the cordless telephone 16 via the wireless connection device 14 to ring the bell.

Further, in this configuration, the wireless connection device 14 has the following functions.

(1) A function of setting a time for capturing a wireless line for a time longer than the time for the fixed telephone network 10 to determine the end of call, in accordance with an instruction from the wireless line control device 12.

(2) A function of relaying a hooking signal from the cordless telephone 16 to the wireless line control device 12 during a call.

(3) A function of relaying an on-hook signal or an off-hook signal from the cordless telephone 16 to the wireless line control device 12.

(4) A function of relaying an incoming signal from the wireless line control device 12 to the cordless telephone 16 while the wired line 13 and the wireless line 15 are being captured.

Next, the operation will be described. In this configuration, when the cordless telephone 16 makes a call (or is also called on-hook), the wireless line 15 is set up with the wireless connection device 14a,
Then, the call signal is transmitted from the wireless connection device 14a to the wireless line control device 12 via the wired circuit. Upon receiving the call signal, the wireless line control device 12 controls transmission such as DC loop closing to the fixed telephone network side telephone line 10 registered by the cordless telephone 16. Then cordless phone 16
Receives a dial tone sent from the fixed telephone network 10 and then transmits a dial signal. The fixed telephone network connects based on the received dial signal. FIG. 3 shows the state of the cordless telephone 16, the state of the wireless line 15, the state of the wired line 13 and the state of the telephone line 10 of the fixed telephone network according to the present invention.

Next, when the cordless telephone 16 ends the call (also called on-hook), the cordless telephone 16 causes the wireless connection device 14a.
The on-hook signal is transmitted to the radio network controller 12 via the. Next, the wireless line control device 12 which receives this on-hook signal while holding the wired line 13 and the wireless line 15
Disconnects the telephone line 11a by opening the DC loop. After that, the wireless line control device 12 and the wireless connection device 14 disconnect each line when the line capture timer times out.

FIG. 4 shows the state of each line when the cordless telephone 16 makes another call in a short time. Wireless connection device
Even if the telephone line 11 of the fixed telephone network 10 is disconnected, the 14a and the wireless line control device 12 retain both wired and wireless lines. Therefore, if the cordless telephone 16 redials before the timeout, the wireless connection device is connected. Reference numeral 14 relays an off-hook signal from the cordless telephone to the radio network controller 12. Upon receiving the off-hook signal, the wireless line control device 12 can immediately connect to the fixed telephone network by closing the loop of the telephone line 11 and inputting a dial signal from the telephone.

Further, the wireless line control device 12 that detects an incoming signal from the fixed telephone network while the wired / wireless line is held,
The cordless telephone 16 receives the incoming signal through the wireless connection device 14.
To inform. The cordless telephone 16 that receives the notification rings the bell. When the user responds here, the off-hook signal is relayed to the wireless line control device 12 as in the case of transmission,
Connected to the fixed telephone network.

(Effects of the Invention) As described above, since both wired and wireless lines are held, there is an advantage that the time required for setting both wired and wireless lines can be omitted.

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a configuration example of a mobile communication system to which the present invention is applied,
FIG. 4 is a state diagram showing the operation of each conventional line, FIG. 3 is a state diagram showing the operation of the present invention, and FIG. 4 is a state diagram best showing the features of the operation of the present invention. 10 …… Fixed telephone network, 11 …… Telephone line, 12 …… Wireless line control device, 13 …… Wired line, 14 …… Wireless connection device, 15 ……
Wireless line, 16 ... Cordless telephone.

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Inventor Masahiko Hirono 1-2356, Takeshi Yokosuka, Nippon Telegraph and Telephone Corporation, Communication Network No. 2 Research Laboratory (56) Reference JP-A-56-43838 (JP, A)

Claims (1)

(57) [Claims] 1. A cordless telephone system for controlling connection of a call connection area comprising one or more wireless zones by using a cordless telephone system comprising a wireless connection device connected to a cordless telephone via a wireless line. In a mobile communication system in which a wireless network controller that stores and manages existing location information exists between the fixed telephone network and the wireless connection device for cordless telephones, the cordless telephone makes a call again within a short time after the call ends. Alternatively, when answering an incoming call, the fixed line is fixed to the cordless phone by maintaining the wired line from the wireless line control device to the cordless phone and the wireless line for a time longer than the time when the fixed line determines that the call is terminated A continuous line connection method characterized by shortening the time from the end of connection with the telephone network to the line connection for another call.