JPS5881352A - Wide band portable telephone system - Google Patents

Abstract

PURPOSE:To widen the service area of a portable telephone system wherein radio equipment is connected to a subscriber line material, by providing a device for transmitting an incoming annunciation signal by radio in an area including service areas of subscriber line terminals, and an automatic transfer function to a subscriber telephone network respectively. CONSTITUTION:When an incoming signal arrives at a portable telephone set 10a, an exchange 7a equipped with the telephone set 10a actuates radio equipment 12, which transmits an incoming annunciation signal to a wide call area. Once receiving said incoming annunciation signal, the telephone set 10a sets a radio circuit to a nearby base station (or base station 9d when moving into an area D) to send an incoming transfer request to the exchange 7a through an exchange 7b, and the exchange 7a transfers the incoming to the telephone set 10a to the telephone set 9d. When the portable telephone set equipped to the exchange 7a originates in the area D, the exchange 7b follows a conformation procedure with the exchange 7a and then receives a dial signal from the telephone set 10a after the confirmation to set a speed circuit to an opposite subscriber. After the telephone call, the exchange 7b sends a call end signal and its charge to the exchange 7a.

Description

[Detailed Description of the Invention] The present invention expands the service area of a mobile telephone system, which has a small service area, to the entire subscriber telephone network by connecting a wireless device number to the subscriber line in a subscriber telephone network having an automatic transfer function. It is related to the method.

Conventionally, as shown in Fig. 1, this type of small mobile phone system for service areas consists of a base station radio device 2a and a mobile phone 3a connected to a subscriber line 1 (1a, 1b). Instead, a method is known in which a wireless device is connected to make the mobile phone mobile only within a small service area A. That is, when an incoming call from another subscriber telephone is received at the base station wireless device 2a via the exchange 5, the base station device 2a connects the wireless line 4a to the mobile phone 3.
a, and the caller and a mobile phone within service area A #! It was possible to make calls only to 3a. Therefore, when the mobile phone 3a moves to the service area B, the mobile phone 3a has a drawback that it becomes unable to make and receive calls.

The present invention aims to eliminate these drawbacks by providing an automatic call forwarding function to the subscriber telephone network, connecting a wireless device that is intended for multiple shared use as a terminal of the subscriber line, and making it possible to notify incoming calls over a wide area. We installed a wireless device that sends signals wirelessly, and when necessary, calls a mobile phone using an incoming call notification signal.Even if the service area changes, the system tracks and automatically transfers the call, making it possible to make a single call. The drawings will be described in detail below.

FIG. 2 shows an embodiment of the present invention, in which 6 has a function of automatically forwarding an incoming call to a predetermined arbitrary subscriber phone, and a function of requesting and registering automatic transfer from an arbitrary subscriber line. Having a subscriber telephone network,? a, 7b are service areas A, B, C
, D, each of which is accommodated in the joining area 4! ! ! ! Machine, 8a
, 8b, 8c, and 8d are subscriber lines 9a connected to service areas A, B, C, and D.

9b, Elc, 9d are subscriber lines 8a, 8b, 8c, 8d
The exchange 7a is a base station wireless device that is connected to and can be used in common.

a10a*I, which has means for transmitting and receiving signals for requesting and registering automatic call forwarding to and from 7b.
Q b *10c, IQd is service area A, B, C
, D, and has the function of setting up any wireless line with any base station wireless device. lla, llb, llc, and lid are service area A.

This is a group of wireless lines that can be used within B, C, and D.
Reference numeral 12 denotes a wireless device for making wide-area calls, which wirelessly transmits an incoming call notification signal to the entire calling area in accordance with a calling request from the mobile phone 1 from the exchanges 7a and 7b! It is sent in step 3.

When the mobile phone 4110a receives an incoming call, the exchange @7a that accommodates the mobile phone 4110a requests the paging radio device 12 to send an incoming call notification signal, and the paging radio device 1 that received the request
2 sends an incoming call announcement signal via radio 13 to a wide calling area. After receiving the corresponding incoming call notification signal, the mobile phone 10a sets up a wireless link with a nearby base station wireless device, for example, if the mobile phone 10a has moved within the service area, the base station wireless device 8d. , 9d makes an incoming call transfer request. Is the base station wireless device 8d that received the call transfer request an exchange? b and an exchange that accommodates the mobile phone 10a via the subscriber telephone network 6! ! The exchange 7a that receives the call transfer request makes a call transfer request to the switch 17a.
The incoming call to the mobile phone IQa is transferred to the subscriber telephone network 6 and the exchange 7b.
The data is then transferred to the base station wireless device 9d via the subscriber line 8d.

The base station wireless device 8d that received the transfer and the mobile phone 10a are connected by the wireless M line that has already been set up, and this makes it possible to talk between the caller and the mobile phone 10a. .

In the case of a call, if the mobile phone 10a moves within the service area, a wireless line for calling is set up by a predetermined wireless line setting procedure with the base station wireless device 9d,
Sends a dial signal.

The base station wireless device 8d that received the call request makes a call request to the exchange 7b, and the exchange 7b sends a call via the subscriber telephone network 6 to the exchange 7a that accommodates the mobile phone tOa that made the call request. , a confirmation procedure is carried out before starting a call in the service area of the base station radio equipment M8d. Furthermore, after the call ends, the exchange 7b also transmits a call end signal and an information signal regarding the call charge to the exchange #J7a. After receiving all the confirmation signals, the exchange 7b receives the dial signal from the mobile phone 10a, and sets up a call line with the other party via the subscriber telephone network 6.
The mobile phone 4110a can now make calls in the service area in the same way as in the original service area A.

As explained above, a mobile phone can make and receive calls in the same way as conventional mobile phone systems with small service areas, regardless of where the mobile phone moves as long as it is in the vicinity where a base station wireless device is installed. By sequentially installing base station wireless equipment in places where subscriber lines are connected, such as ordinary houses, offices, and restaurants, according to the convenience of users, it will be possible to replace conventional subscriber telephones and public telephones. A more mobile wide area mobile phone system can be constructed.

[Brief explanation of the drawing]

FIG. 1 shows an example of a line configuration of a conventional mobile telephone system, and FIG. 2 shows an example of a line configuration of an embodiment of the present invention. Ia, lb: Subscriber line 2a, 2b: Base station wireless equipment 3a, 3b: Mobile phone talk 41 4a, 4b: f
i-line line tie5: switchboard 6: subscriber telephone network?
a, 7b: Exchange 8a, 8b, 8c, 8d
: Subscriber lines 9a, 9b, 8c, 9d: Base station radio equipment 10a, 10b, 10c, 10d: Mobile phone 1
1a, llb, llc, lid: Radio line 12: Calling radio device 13: Calling wireless line Patent applicant: Nippon Telegraph and Telephone Corporation Patent application agent Megumi Yamaki

Claims (1)

[Claims] The telephone network has a function to automatically forward incoming calls to any predetermined subscriber line, and a function to request and register automatic forwarding from any subscriber line, and each subscriber line terminal and each mobile phone The telephone has a wireless device that sets up a wireless line between an unspecified subscriber line terminal and an unspecified mobile phone, and receives calls over the entire service area of the mobile phone that spans the service area of multiple subscriber line terminals. A paging radio device that wirelessly transmits an announcement signal is provided, and when a mobile phone receives an incoming call announcement signal, it requests automatic transfer of the incoming call to a nearby subscriber line terminal via a nearby subscriber line terminal. A subscriber telephone line is set up between the caller and the mobile phone by setting up a wireless line between the registered and transferred subscriber line terminal and the mobile phone according to a predetermined procedure. Wide area mobile phone system.