CN1137852A - Cordless telephone system and base station and handset in such system - Google Patents

Abstract

Known is a cordless telephony and wide area paging system (PS, PT1, PT2, PT3) which allows roaming of cordless subscribers (HS1, HS2, HS3) over a wide area with respect to incoming calls from a fixed network subscriber (SUBA; T1). In the known system, the handsets (HS1, HS2, HS3) are provided with a wide area pager which can receive paging messages from a paging server which contain a subscriber's number (SUBA) of a calling fixed network subcriber. The handset (HS1) transforms an incoming call from a fixed network subscriber into an outgoing call. In such a system no standard cordless telephony handsets can be applied. Furthermore, the handsets implementing this feature are more expensive than standard handsets. In addition thereto, call charging is difficult. An improved system is proposed in which non-dedicated base stations (CT; BS1, BS2) comprise a paging receiver (PR) for receiving the paging messages (PM) from a paging server (PS). The base stations (BS1, BS2) page the called handset's subscriber (SUBB) when locked to the base station (BS1). Thereupon, the called handset's subscriber (SUBB) or the handset (HS1) can complete the call to the calling fixed network subscriber (SUBA). The system, which is relatively cheap and can easily be installed, can be used to replace public call-boxes.

Description

Base station and mobile phone in cordless telephone system and this system

The present invention relates to comprise at least one base station with the cordless telephone system of at least one mobile communication, this system adopt wide territory paging network structure to mobile phone be conveyed into call out initiate professional.In this cordless telephone system, mobile phone and base station can be reduced to an ordinary old style telephone in the wireless local loop replacement switched telephone network, the base station also can be the wireless expansion part of PABX, or the remote spots air station that is connected with switched telephone network.In addition, the one group of base station that covers than the zonule can form commercial net.For the system that resembles the DECT (European digital cord-less communication), even call out switching between the sub-district that can cover in the base station.

The invention still further relates to the base station and the mobile phone that are used for this system.

The known business that is installed in by Public Telecommunications Operator in the cordless telephone system of public place in the base station is called the telepoint business, and it makes this professional user can insert public switched telephone network (PSTN).Overlay area, base station own is limited, for example hundreds of rice.At handbook " European wireless communication ", W.H.Twttlebee, Springer-Verlag has described this telepoint business in 1990, the 91～101 pages, also has wireless commercial system and zero-clearance handoff procedure.In base station and telepoint that an analog or digital telephone wire is connected, charging can be calculated phonecard, credit card and the authentication procedure of calling unit when calling out, or is undertaken by the similar procedure that network operator provides.The problem of telepoint is that common cordless handset user can only go out calling.European patent application EP 0 212 761 provides a kind of solution for this problem.The mobile communication system of describing in EP0 212 761 is a cordless telephone and wide territory paging group assembly system, its allow mobile phone cover by wide area paging system on a large scale in roam.Typical wide area paging system is operated in 200 kilometers sub-districts of VHF frequency range (very high frequency(VHF)).Here, have an information beep-pager in the mobile phone, it when mobile phone is positioned at non-private base station scope, receive mobile phone go into to call out.When carrying out once from a fixed network user or another mobile phone during i.e. incoming call service, sending paging information with broadcasting the information beep-pager of paging system in mobile phone to the calling of this mobile phone, paging information comprises rear subscriber number and called number.Calling is during from the fixed network user, paging receiving information also to the mobile phone of its decoding automatically according to the rear subscriber number that solves, or on the dialing keyboard, keys in rear subscriber number nearest base station in the searching scope afterwards by the prompting of paging information the called subscriber.When finding such base station and available wireless channels is arranged, a generalized calls creation facilities program (CFP) is activated, be used for that incoming call wants to arrive from mobile phone go out to call out, when calling out, carry out a more complicated program from another mobile phone.At first, the caller mobile phone locks onto on the base station, dials called mobile phone number.The paging service platform sends paging information to called mobile phone then, comprises the ID-sign indicating number (identification code) of the base station of caller mobile phone locking in the information.Thereafter the program of Zhi Hanging be used for fixing the host and cry that the user's is identical.In order to obtain bigger mobility, the base station in this known system links to each other with the mobile radio station of cell mobile communication systems, therefore allows roaming during calling out.In this system, can not use the standard cordless portable part that has only the cordless telephone transceiver, because the mobile phone among the EP 0 212 761 except the cordless telephone transceiver, also requires to have a paging receiver.And this paging receiver has improved the cost of cordless portable part.In the system that EP 0,212 761 describes, the call charging of incoming call has brought another problem, and suggestion is carried out basic call according to the discharge rate of institute's packed battery in the cordless telephone and chargeed.This just requires to be provided as single sourcing by the PTT tissue battery of special shape.Other suggestion charging method that is used for the system of major company requires the base station that special company code is arranged.

A target of the present invention provides a kind of simple and cheap relatively cordless telephone system, and this system has the base station of telepoint type, allows the incoming call service of the mobile phone that is connected with this non-private base station.Another target is to use the almost mobile phone of standard in this cordless telephone system.It is to provide a kind of simple relatively call billing method for the calling of going in this system that the present invention also has a target.

Therefore according to cordless telephone system of the present invention, it is characterized in that the base station is connected with the paging receiver of a paging receiving information, these information are from the paging service platform that links to each other with switched telephone network, and information includes calling party's number; It is characterized in that base station that incoming call is sent to and/or mobile phone comprise according to going into the call setup device that calling party's number is set up this incoming call.Like this paging receiver quantity of Xu Yaoing still less, just only such as the telepoint base station or with base station that PABX (PABX) links to each other on need.When certain paging protocol is supported in the base station, just under the situation of DECT base station, this agreement can be used to send rear subscriber number.Otherwise need a special-purpose paging protocol.Call charging can followingly carry out.If not free (free calling number), incoming call is chargeed by the calling party.Exhalation (or recall) is chargeed by following process by the callee usually.The expense directly phonecard from travelling carriage is deducted.Detected and translate into the charge quantity of from phonecard, deducting from the metering pulse of PSTN in the base station.Phonecard is provided by the network provisioning person.Perhaps, expense selling on credit in the number from be stored in travelling carriage deducted.Sell number on credit is called in from the credit card supplier by the individual calling of selling on credit there.Joining procedure to credit card supplier host is provided by the base station.Perhaps using a standard credit card, credit card inspection is a part to the lock program of base station.After calling is finished, will charge by sending charge information to the service supplier host from the base station.If the base station is set up recall automatically, recall should be chargeed by the calling party, because the callee can not determine whether he will reply.Have only as the calling party and when information desk transmits charging quantity, just may do like this during at call release in base station that the paging service platform was registered, worked.

In a cordless telephone system embodiment of the present invention, the base station is included in mobile phone when locking onto the base station, be used for the transmitter of the paging information that send to receive to mobile phone, apparatus for establishing in mobile phone, with according to go into calling party's number be established to the incoming call user go out to call out.Mobile phone has just converted incoming call to exhalation like this.

In another cordless telephone system embodiment of the present invention, the call setup device is included in the base station, so that the incoming call that is established to into the calling party connects, the base station comprises that one is used for sending the call setup paging information being established to the wireless connections of mobile phone to mobile phone, thereby finishes the transmitter that incoming call is set up.Like this, at first carry out be from the base station to fixed network calling subscriber's connection, with the prompting calling subscriber set up to called subscriber's connection.Doing like this is because total connect hours may surpass the calling subscriber to be felt abnormal time interval, so the calling subscriber may remove connection.

Also proposed other embodiment in dependent claims, for example automatic or manual foundation is called out after receiving by the paging information of transparent transmission, perhaps paging receiver and base station is placed in the casing.In cordless telephone system most preferred embodiment of the present invention, this system is and a DECT system such as POCSAG (postcode standardization consulting group) system or similar information paging system combination.The DECT system itself is the micro cellular system of a support such as 92-93 page or leaf and 274 pages of described switchings in that this handbook of Tuttlebee.The base station can comprise that storage goes into the storing apparatus of paging information, also can comprise chargeing automatically and authenticating the modulator-demodulator that the host is connected.If not immediate answer is called out, mobile phone can comprise the storing apparatus that stores paging information.That is to say do not reply or mobile phone only waiting bide one's time just can obtain information and can obtain information needed by polling routine in repeated paging information.

Below with reference to the accompanying drawings, the present invention is described by way of example:

Fig. 1 represents according to a cordless telephone system of the present invention.

Fig. 2 represents according to the base station in the cordless telephone system of the present invention.

Fig. 3 represents according to the mobile phone in the cordless telephone system of the present invention.

Fig. 4 represents according to the frame structure in the cordless telephone system of the present invention.

Fig. 5 represents according to the paging information in the cordless telephone system of the present invention.

Fig. 6 represents the flow chart according to base station operation in the cordless telephone system of the present invention.

In institute's drawings attached, adopt same code name to represent to same device.

Fig. 1 represents according to a cordless telephone system 1 of the present invention, and it comprises the base station BS 1 that is connected with public switch telephone network PSTN and so on switched telephone network and BS2 and the base station BS 3 and the BS4 that link to each other with PSTN by PABX PABX.Switching network can be shown in the simulation net or the digital network such as ISDN (integrated services digital network) of PSTN net and so on.Network PSTN can be a private network.Cordless telephone system 1 also comprises mobile phone HS1, HS2 and HS3.Cordless telephone system can be an analogue system, but digital system such as the DECT system preferably.In the DECT cordless telephone system, support the mobile phone zero-clearance of describing in the European patent application EP 0 576 07 for example to switch.Cordless telephone system 1 adopts with broadcasting wide territory paging network structure, and it comprises paging transmitter PT1, PT2, PT3 and paging service platform PS, and paging transmitter PT1, PT2 and PT3 cover Da Qu C1, C2 and C3 respectively, and the Da Qu diameter is 200km.The wide territory paging network of the class standard of this support POCSAG itself is well-known, is not described in detail herein.Also represented a fixed network subscriber phone T1 among Fig. 1.Base station BS 1 and BS2 support for example described telepoint business of that this handbook of Tuttlebee, and base station BS 1 and BS2 also can't help certain mobile phone special use.The present invention relates to the incoming call service of the mobile phone that links to each other with telepoint serving BS or other non-private base station, for example when one of the base station BS 3 in locking onto the commercial system that constitutes by switch PABX and base station BS 3, BS4 and BS4, from fixed network subscriber phone T1 or go into calling out from mobile phone HS3, when locking onto base station BS 1, to mobile phone HS1.Therefore the present invention can provide a simple and easy-to-install substitute for telephone booth especially.

Fig. 2 represents according to the base station BS in the cordless telephone system of the present invention 1.Base station BS 1 is a non-special-purpose DECT base station of supporting telepoint or similar telepoint business.Base station BS 1 comprises one as cordless telephone CT and the paging receiver PR shown below as dotted line dl shown in more than the dotted line dl, and cordless telephone CT is connected to paging receiver PR.Cordless telephone CT and paging receiver PR preferably include in same casing.Cordless telephone CT comprises by the transceiver 10 of burst mode controller 11 controls, connects the base station to the line interface 12 of PSTN net, microcontroller 13 and the burst mode controller 11 and the line interface 12 of control transceiver 10.Burst mode controller 11 can be an IC (integrated circuit) who realizes PCD 5041 types of so-called DECT physical layer and DECT MAC (medium accesses control) layer time-limited function.About this burst mode controller 11 more detailed descriptions references " PCD 5041 type IC databooks ", in July, 1993,1-65 page or leaf.Microcontroller 13 is programming devices that comprise ROM and RAM (not marking), realizes such as locking onto dect standard functions such as mobile phone, foundation calling.About DECT systemic-function more detailed description, be not purpose of the present invention, can be with reference to dect standard.Microcontroller 13 also links to each other with a locking list memory 14, has wherein stored cellphone subscriber's user profile, for example locks onto cellphone subscriber's number of base station BS 1.Work carrier wave that the DECT base station always has at least one mobile phone to lock when idle mode for this reason.Paging receiver PR, for example a POCSAG paging information receiver comprises receiver front end 15 and paging information decoder 16.According to the present invention, decoder 16 links to each other with microcontroller 13 among the cordless telephone CT.Cordless telephone CT has a reception/transmitting antenna A1, and paging receiver PR has a reception antenna.

Fig. 3 represents according to the mobile phone HS1 in the cordless telephone system 1 of the present invention.Mobile phone HS1 is a DECT mobile phone, locks onto telepoint base station BS 1, and the locking list memory block 14 in the base station BS 1 comprises cellphone subscriber's number.Mobile phone HS1 comprises zero-IF (intermediate frequency) receiver, and it links to each other with the reception/emission switch 21 of input and the burst mode controller of output.Reception/emission switch 21 is connected with reception/transmitting antenna A3.Burst mode controller 22 also links to each other with ADPCM (adaptive difference pulse code modulator) codec 23 of compression/extension digitize voice.Mobile phone HS1 comprises that also one is connected with the burst mode controller at input, the transmitter 24 that is connected with reception/emission switch at output.Voltage controlled oscillator among the mobile phone HS1 links to each other with zero-IF receivers 20, also links to each other with transmitter 24 by synthesizer 26.Prescaler among the mobile phone HS1 links to each other with synthesizer 26 with oscillator 25.Mobile phone HS1 also comprises the microcontroller 27 that is connected with RAM29 with the ROM28 of storage program, and microcontroller 27 links to each other with ADPCM codec 23 with burst mode controller 22 again.Microcontroller 27 has analog-and digital-I/O (I/O) interface (not marking in detail) and is used to key in the display 31 of dialing information and special display message to keyboard 30 to connect it.In one embodiment of the invention, the fixed network Subscriber Number that display 31 shows by base station BS 1 transparent transmission is replied into calling by dialing fixed network user on shown Subscriber Number basis with permission.In another embodiment of the present invention, be stored in automatically in the dial storage area (not marking) that all has usually, go into to call out from dynamic response to allow mobile phone by the fixed network Subscriber Number of transparent transmission.In Fig. 3, arrow 32 expression bi-directional digital voice.

Fig. 4 represents according to the frame structure FR in the cordless telephone system of the present invention.This is a DECT frame structure FR, and useful BS represents 12 time slots and 12 time slots from the mobile phone to the base station from the base station to the mobile phone to HS.In Fig. 4, suppose that mobile phone HS1 locks onto base station BS 1, when method of calling, time slot TS4 and TS16 transmit from base station BS 1 to mobile phone HS1 respectively and 1 the information from mobile phone HS1 to base station BS.Also represented an ADPCM codec 23 among the figure, when carrying out the incoming call service, it links to each other with the gentle voice buffering district SB2 that brings from the ADPCM of time slot TS16 input of voice buffering district SB1 that buffering ADPCM outputs to time slot TS4.

Fig. 5 represents that it generally includes synchronizing information SY, address AS, separator SE and data DT according to the POCSAG paging information PM in the cordless telephone system 1 of the present invention.In giving example, the fixed network user just uses phone T1, the Subscriber Number calling subscriber as SUBA, and dialing paging service platform PS also provides called number SUBB to the paging service platform, i.e. mobile phone HS1 Subscriber Number.For mobile phone HS1, calling is an incoming call.For example in Germany, the paging service platform has dials the number 190 in advance.In wide territory paging information PM, called number SUBB constitutes address of paging AS, the part of the rear subscriber number SUBA composition data DT that provides by paging service platform PS, and DT also can comprise other free-format text message TXT.Therefore data DT, i.e. rear subscriber number SUBA and text TXT, for the receiving party, just the paging receiver PR of base station BS 1 is a transparent information in the present invention.Receive after the paging information PM that decoder among the paging receiver PR 16 is deciphered it.Decoder 16 provides rear subscriber number SUBA and called number SUBB to microcontroller 13, and any other free-format text, for example text TXT.Microcontroller is called number SUBB and locking list relatively.After on the correspondence, the transparent information of base station BS 1 in called subscriber's mobile phone HS1 transmission paging information PM, just rear subscriber number and any text TXT.Called subscriber's mobile phone HS1 converts incoming call to exhalation by its dial storage area automatically, thereby perhaps makes the called subscriber can key in rear subscriber number SUBA by display 31 prompting called subscribers.In the DECT cordless telephone system, the paging of being done by base station BS 1, just send rear subscriber number SUBA and any text to mobile phone HS1, can be as the preliminary ETS 175-5 of ETSI (ETS association) dect standard, in March, 1992, the 5th part, " network layer ", the 53rd chapter carries out in the so-called CISS-information of describing in the 33-34 page or leaf (calling out independent auxiliary activities), therefore just needn't specify New Deal.In other cordless telephone system, there is not this option, must specify a specialized protocol, also need to change mobile phone HS1.

Fig. 6 is according to handling in the cordless telephone system 1 of the present invention from the base station program flow chart of the paging information PM of paging service platform PS reception.Flow process is from the idle mode shown in the module 40.In module 41, receive the calling of going into from the fixed network user.At module 42 check called mobile phone Subscriber Numbers whether in locking list memory block 14.If, the base station sends CISS information to the called mobile phone user as described in Figure 5 in the module 43.

In another embodiment, base station BS 1 at first dials the fixed network user who uses phone T1.When being connected to Subscriber Number and being this user of SUBA, this user can obtain such as " connect and carry out, please wait for " or call out the user's and so on that wants voice messaging.Base station BS 1 calling called subscriber is so that connect and can finish then.

Claims (14)

1. comprise at least one base station (BS1, BS2, BS3, BS4) with at least one mobile phone (HS1, HS2, HS3) Tong Xin cordless telephone system (1), this system (1) adopt wide territory paging network (PS, PT1, PT2, PT3) foundation structure starts into call business to mobile phone, it is characterized in that base station (CT; BS1 BS2) links to each other with paging receiver (PR), and to receive the paging information (PM) from the paging service platform (PS) that joins with switched telephone network (PSTN), this information (PM) comprises incoming call Subscriber Number (SUBA); The feature of this system is that also base station and/or mobile phone that incoming call is sent to comprise the call setup device of setting up calling according to incoming call Subscriber Number (SUBA).

2. according to the cordless telephone system (1) of claim 1, wherein base station (BS1) comprises the transmitter (CT) that is used for sending to mobile phone (HS1) paging information that receives when mobile phone locks onto the base station, apparatus for establishing (27) is included in the mobile phone, so that be established to incoming call user's the calling that goes out according to incoming call Subscriber Number (SUBA).

3. according to the cordless telephone system (1) of claim 2 correspondence, wherein call setup device (27) is used for setting up out automatically calling.

4. according to the cordless telephone system of claim 2, wherein mobile phone comprises the keyboard (30) of keying in dialing information and shows the display unit (31) that receives incoming call Subscriber Number (SUBA) to cellie (SUBB), also has to set up the call setup device (27) of exhalation when the user keys in incoming call Subscriber Number (SUBA) as dialing information.

5. according to the cordless telephone system (1) of claim 1 correspondence, wherein call setup device (13) is included in the base station, connect with the incoming call that is established to incoming call user (SUBA), and base station (BS1) comprises and is used for sending the transmitter (CT) of call setup paging information (CISS) with the wireless connections that are established to mobile phone to mobile phone, thereby finish into call setup.

6. according to the cordless telephone system of claim (5), wherein base station (BS1) sets up with notice incoming call customer call to incoming call user (SUBA) transmission outstanding message (" please wait for ") and finishes.

7. (BS1, BS2, BS3, BS4) can communicate by letter, adopt wide territory paging network (PS with at least one mobile phone (HS1, HS2, HS3) at least one base station, PT1, PT2, PT3) structure transmits the base station (BS1) of using in the cordless telephone system of incoming call business to mobile phone, it is characterized in that base station (CT; BS1 BS2) links to each other with the paging receiver (PR) of paging receiving information (PM), and information (PM) is from the paging service platform (PS) that joins with switched telephone network (PSTN), and this information (PM) comprises incoming call Subscriber Number (SUBA); Its feature is that also base station and/or mobile phone that incoming call is sent to comprise the call setup device of setting up incoming call according to incoming call Subscriber Number (SUBA).

8. according to the base station (BS1) of claim 7, it comprises that storage locks onto the Subscriber Number memory block (14) of mobile phone (HS1) Subscriber Number of base station (BS1).

9. according to the base station (BS1) of claim 7 or 8, base station (CT wherein; BS1) and paging receiver (PR) be included in the same casing.

10. according to the base station (BS1) of claim 9, wherein base station (BS1) is a numeral station that comprises the microcontroller (13) of cordless telephone transceiver (10,11) and control transceiver (10,11), paging receiver (PR) comprises a decoder (16) that joins with microcontroller (13), thereby the incoming call Subscriber Number (SUBA) that receives is sent to cordless telephone transceiver (10,11) by microcontroller (13).

11. according to any one base station in the claim 7 to 10, it comprises the memory block of storage incoming call paging information.

12. according to any one base station in the claim 7 to 11, it comprises that one is chargeed automatically and authenticates the modulator-demodulator that the host is connected.

13. at least one base station (BS1, BS2, BS3, BS4) can with at least one mobile phone (HS1, HS2, HS3) communication, the wide territory paging network (PS of employing, PT1, PT2, PT3) structure transmits the mobile phone (HS1) that uses in the cordless telephone system of incoming call business to mobile phone, it is characterized in that, mobile phone (HS1) comprises call setup device (27), and when the incoming call user wanted calling handset user (SUBB), this device basis was from base station (CT; BS1) the incoming call Subscriber Number of receiving in the paging information of Laiing (PM) (SUBA) is established to the exhalation of incoming call user (SUBA), the base station links to each other with the paging receiver (PR) of paging receiving information (PM), and information (PM) from and the paging service platform (PS) that joins of switched telephone network (PSTN).

14. according to the mobile phone of claim 13, it is included in the memory block of storage paging information when not having immediate answer to call out.

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