BACKGROUND The wired telephone communication systembymeans of wireless communication modules is such a system which exchangeably switches wireless communication modules connected to outside wireless communication network to which outside phones are connected and the wired telephones connected to the system by means of an exchange part and establishes call channel between them and, accordingly, establishes phone-communication between the outside phones and the wired telephones.

At this time, the exchange part may also exchangeably switches the wired telephones connected to the system and establishes the phone communication between them.

This wired telephone communication system by means of the

wireless communication modules enables users of the wired telephones to communicate with outside by making use of the wireless communication network and, at this time, the wired telephones need not to be connected to the PSTN (Public Switched Telephone Network). Therefore, this system is very useful when establishing communication infrastructure on a region because, if there is an established wireless telephone communication network on the region, the communication by means of the wired telephones are achieved by making use of the wireless telephone communication network without establishing the PSTN, which needs much time and cost.

The wiredtelephone communication systembymeans of wireless communication modules needs a charging system for calls when the wired telephones are used.

The present invention provides a charging system for calls between wired telephones in the'wired telephone communication system by means of wireless communication modules and the method for the same.

SUMMARY OF THE INVENTION The purpose of the present invention is to provide a charging system and a method by which the charge is possible for calls between the wired telephones connected to the wired telephone communication system by means of the wireless communication modules.

The wired telephones connected to the wired telephone

communication system by means of the wireless communication modules exchageably switches between a plurality of the wireless communication modules connected to wireless telephone communication network and the wired telephones connected to the system and between the wired telephones connected to the system and establishes call channel between them. In such a system, the present invention is characterized in that, for communication between the wired telephones, the system measures and memorizes communication time with respect to the respective wired telephone, and delivers the communication time data to one of resting wireless communication module among the wireless communication modules, and the wireless communication module to which the communication time data is delivered transmits the communication time data with respect to the respective wired telephone to base station of the wireless telephone communication network so that common carrier who receives the communication time data with respect to the respective wired telephone can charge to the respective wired telephones for its use based on the received communication time data.

In this case, it is desirable if the communication time data which the wireless communication module transmits is sent to charge database server of the common carrier via Internet after its transmit to the base station. Also, it is desirable if the communication time data which the wireless communication module transmits is sent to facsimile machine of the common carrier via PSTN after its transmit to the base station.

The charging method for communication between the wired

telephones including the steps of start time checking step which checks start time of communication between the wired telephone and object wired telephone, finish time checking step which checks finish time of communication between the wired telephone and object wired telephone, communication time measuring and storing step which measures communication time between the start time and the finish time and stores the communication time with respect to the wired telephone, searching step which searches the wireless communication modules to find out resting wireless communication module, communication time data delivering step which delivers the communication time data with respect to the wired telephone to the found resting communication module, and communication time transmitting step in which the wireless communication module to which the communication time data is delivered transmits the communication time data with respect to the wired telephone to common carrier.

In this case, switching center of the wireless telephone communication network remembers telephone numbers of the wireless communication modules usable to the respective wired telephone so that the switching center distinguishes the same wired telephone number by the wireless communication module numbers. Alternatively, the switching center of the wireless telephone communication network remembers system distinguishing number to which the respective wired telephone belongs, and the control part remembers the system number with respect to the respective wired telephone and delivers data including system distinguish number as well as the

communication time to the wireless communication module, and the wireless communication module transmits the communication time data with respect to the respective wired telephone and the system number to base station of the wireless telephone <BR> <BR> <BR> <BR> communication network by receding on the readily defined protocol field with the switching center so that the switching center distinguishes the same wired telephone number by making use of system number.

BRIEF EXPLANATION OF DRAWINGS Fig. 1 shows configuration of a wired telephone communication system by means of wireless communication modules according to the preferred embodiment of the present invention ; Fig. 2 shows that a plurality of the wired. telephone communication systems are equipped with respect to a wireless telephone communication network; Fig. 3 is a sequence chart showing the operation of the present invention ; Fig. 4 shows flow chart of a control part of the present invention showing how the control part gets the communication time information with respect to the respective wired telephone ; Fig. 5 shows data base tables storing communication time in connection with respective wired telephone; Fig. 6 shows a flow chart of the control part when the communication time is periodically delivered; Fig. 7 is a configuration view showing charging data is send

to common carrier ; and Fig. 8 shows type of the data which the control part delivers to the communication module.

DETAILD EXPLANATION OF PREFERRED EMBODIMENT Now, the preferred embodiment of the present invention will be explained with reference to the accompanying drawings.

Fig. 1 is a view showing configuration of a wired telephone communication system 100 by means of wireless communication modules according to the preferred embodiment of the present invention.

The wired telephone communication system 100 by means of wireless communication modules has a plurality of wireless communication modules 10a, lOb,..., 10n. Each of the wireless communication module transmits telephone signal to wireless telephone network 300 and receives the telephone signal from the wireless telephone network 300.

The wireless telephone communication network 300 has a base station 310, a control station 330 and a switching center 350 and each of the wireless communication modules 10a, 10b,....

10n transmits the telephone signal to the base station 310 of the network 300 or receives the telephone signal from the base station 310 of the network 300 so that the module 10a, lOb,..., 10n can communicate with an outside wired telephone 210 connected to the network 300 through a PSTN 200 or a mobile phone 410 which communicates with the base station 410.

The wired telephone communication system 100 by means of wireless communication modules has a wired telephone connecting part 30 and a plurality of wired telephones la, lb, lc,... In are connected to the wired telephone connecting part 30 via phone-line. Each of the wired telephones la, lb, lc,... In has its own telephone number.

The system 100 has an exchange part 23 which exchangeably switchesthewirelesscommunicationmodulesl0a, 10b, 10c,... 10n and the wired telephones la, lb, lc,... In connected to the wired telephone connecting part 30. The system 100 has an announcement part 25 which announces necessary information to the wireless communication module or the wired telephone, which are switched to the exchange part 23. The exchange part 23 may be a conventional PBX (Private Branch Exchange) or KEY system.

The announcement part 25 announces the information such as ring signal, communication signal or busy signal and other necessary messages as described hereinafter.

Furthermore, the system 100 has a decoder 24 which decodes DTMF telephone signal into data, the DTMF signal inputted through the wireless communication module or wired telephone switched to the exchange part 23.

These wireless communication modules 10a, 10b, 10c,....

10n, the wired telephones la, lb, lc,... ln, the exchange part 23, the announce part 25 and the decoder 24 are connected to a control part 21 and are under the control of the control part 21. The control part 21 includes CPU and memory and the memory stores a control program determining the operation of the CPU

and data which the CPU processes.

In the present invention, the control part 21 has a <BR> <BR> <BR> <BR> <BR> communication start-time sensing and the time storing means which senses the start time of the communication when object phone answers call from the wired telephone and stores the time on the memory. The control part 21 also has a communication finish-time sensing and the time storing means which senses the finish time of the communication when either of the object phone or the wired telephone finishes the call and stores the finish time on the memory. Further, the control part 21 has a communication time measuring and the time storing means which measures the communication time between the start and finish time of the communication and stores the communication time on the memory.

The telephone signal which is decoded into data by the decoder 24 is inputted to the control part 21 and the control part 21 establish call channel between the outside phone 410 or 210 and the wired telephone la, lb, Ic,... ln or between the wired telephone la, lb, lc,... ln.

The exchange part 23 may be configured into a wireless communication module exchange part and a wired telephone exchange part. The wireless communication module exchange part switches the wireless communication module 10a, 10b, 10c,..., 10n and the wired telephone exchange part switches the wired telephone la, lb, lc,..., ln. Also, the decoder 24 is configured into a wireless communication module decoder and a wired telephone decoder. The wireless communication module decoder decodes the

telephone signal from the wireless communication modules switched to the wireless communication module exchange part and the wired telephone decoder decodes the telephone signal from the wired telephone switched to the wired telephone exchange part.

Fig. 2 shows that a plurality of the wired telephone communication systems 100 are equipped. With respect to the wireless telephone communication network 300, the systems may be placed on region by region, or, if the system is made to movable type, a plurality of the systems 100 may be equipped on a region.

The achievement of call between the outside phone 210 or 410 and one of the wired telephones la, lb, lc,..., In is as follows.

Firstly, when the outside phone 210 or 410 tries to call one of the wired telephones la, lb, lc,..., In, the call achievement between them is explained.

The outside phone 210 or 410 transmits telephone signal to one of the wireless communication modules 10a, 10b, 10c, ».., 10n. This signal is received to the objected wireless communication module via wireless telephone network 300 and, between the outside phone 210 or 410 and the objected wireless communication module, the communication mode is set up and maintained. That is, when a user of the outside phone 210 or 410 inputs a phone number of the wireless communication module, the outside phone 210 or 410 transmits the telephone signal and the transmitted telephone signal is received by the objected wireless communication module through the wireless telephone

network 300. Accordingly, the communication mode between the outside phone and the objected wireless communication module is established.

At this time, the switching center 350 may assign representative number to one of the wireless communication module 10a, 10b, 10c,.., 10n and respectively assign forwarding numbers to the remains of the wireless communication modules. In that case, when the outside phone 210 or 410 tries call by the representative number and the wireless communication module of the representative number is in use, the switching center 350 automatically forwards the telephone signal to other wireless communication module. Accordingly, the user of the outside phone 210 or 410 needs not to know all the numbers of the wireless communication modules, and can call only by the representative number.

The control part 21 is connected to the wireless communication modules 10a, lOb, 10c,..., lOn and always checks whether the wireless communication modules 10a, 10b, 10c,..., lOn receive the telephone signal. Accordingly, when one of the wireless communicationmodules receives the telephone signal, the control part 21 perceives it. Then, the control part 21 controls the exchange part 23 to switch the wireless communication module receiving the telephone signal from the outside phone 210 or 410. Also, the control part 21 operates the decoder 24 connected to the exchange part 23.

After that, the control part 21 controls the announcement part 25 to announce the message to input the own number of the

object wired telephone to the wireless communication module receiving the telephone signal. Since the wireless communication module is in communication mode with the outside phone, the announcement is delivered to the outside telephone.

When the user of the outside phone 210 or 410 inputs the own number of the object wired telephone, this input signal is delivered to the decoder 24 via the wireless communication module receiving the telephone signal and the exchange part 23. The input signal delivered to the decoder 24 is DTMF signal and the decoder 24 decodes the DTMF signal into data. The data of the own number of the object wired telephone is inputted to and read by the control part 21.

Then, the control part 21 checks whether the object wired telephone is in use. If the object wired telephone is in use, the control part 21 controls the announcement part 25 to announce the line-busy message to the wireless communication module in communication with the outside phone 210 or 410. Accordingly, the user of the outside phone can recognize that the object telephone is in use.

If the object wired telephone is not in use, the control part 21 controls the exchange part 23 to switch the object wired telephone. Then, the announcement part 25 delivers the ring signal to the object wired telephone switched to the exchange part 23. By the ring, the user of the object wired telephone hooks off and the communication mode between the outside phone and the object wired telephone is established.

Accordingly, it is possible to communicate between the

outside phone and the object wired telephone by the system 100 of the present invention.

When one of the wired telephone la, lb, lc,..., In tries to call the outside phone 210 or 410, the achievement of call between them is explained.

Firstly, one of the wired telephone la, lb, lc,... In is hooked off. The control part 21 connected to the wired telephones <BR> <BR> <BR> <BR> <BR> latlbolc,..., lnalwayschecksthestatusofthewiredtelephones la, lb, lc,..., In. When one of the wired telephone la, lb, lc,... In is hooked off, the control part 21 perceives it. Then, the control part 21 controls the exchange part 23 to switch the wired telephone. Also, the control part 21 operates the decoder 24 connected to the exchange part 23.

Next, the control part 21 searches the wireless communication modules to find a wireless communication module which is not in use.

If the resting wireless communication module (that is wireless communication module which is not in use) is not found, the control part 21 controls the announcement part 25 to announce the busy message to the wired telephone trying to call the outside phone. And the control part 21 breaks the switch between the exchange part 23 and the wired telephone trying to call.

If the resting wireless communication module is found, the communication mode signal is delivered to the wired telephone and the user of the wired telephone inputs the object outside phone number. The DTMF signal presenting the object outside phone number is delivered to the decoder 24 via the exchange

part 23 and the decoder 24 decodes the DTMF signal into data.

The objected outside phone number data is read by the control part 21 and the control part 21 judges whether the input of the objected outside phone number is completed. For instance, the control part 21 judges that the input of the objected outside phone number is completed if no more input is detected after waiting 8 seconds. Alternatively, the control part 21 may judges that the input of the objected outside phone number is completed when the user inputs special letter such as * or #.

Then, the control part 21 switches the found resting wireless communication module to the exchange part 23. And, the control part 21 delivers the objected outside phone number data to the resting wireless communication module. For example, the control part 21 and the wireless communication module is connected by RS 232C so that the objected outside phone number data is delivered to the resting wireless communication module.

The wireless communication module transmits the telephone signal including the objected outside phone number data to the base station 310 of the wireless communication network 300.

The achievement of call between the wired telephones la, lb, lc,..., In connected to the system 100 is explained.

Firstly, one of the wired telephones tries to call (hook off), the control part 21 recognize it and switches the wired telephone to the exchange part 23 and operates the decoder 24. In this case, a user of the wired telephone may input special letter to the wired telephone to inform the control part 21 that this call try is directed to the other wired telephone. Alternatively,

the user may push the hook one more.

Then, the user inputs the telephone number of the object wired telephone and this DTMF signal of the telephone number is delivered to the decoder 24 in which the DTMF telephone number signal is decoded into telephone number data.

The control part 21 reads the telephone number data and identifies the object wired telephone. Then the control part 21 checks whether the object wired telephone is in use. If the object wired telephone is in use, the control part 21 operates the announcement part 25 to deliver the line-busy signal to the wired telephone trying to call. If the object wired telephone is not in use, the control part 21 switches the object wired telephone to the exchange part 23 and operates the announcement part 25 to deliver the ring signal. When the object wired telephone answers, the call is achieved.

When either of the wired telephone trying to call or the object wired telephone finishes the call (that is hook on), the control part 21 senses it and breaks the switch to both of them.

By this way, the present invention accomplishes the call between the outside phone 210 or 410 and the wired telephones <BR> <BR> <BR> <BR> <BR> <BR> la, lb, lc, ln or between the wiredtelephones la, lb, lc,<BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> <BR> ln.

In the present invention, with respect to the call between the wired telephones, the control part 21 senses the start and finish time of the communication of the respective wired telephone, measures the communication time and stores the communication time. Then, the control part 21 sums all the

communication time with respect to the respective wired telephones and sends the sum data to the switching center 350.

Accordingly, a common carrier can charge to the respective wired telephone for its use based on the sum time. Fig. 3 shows how to accomplish this steps.

Firstly, one of the wired telephones la, lb, lc,..., In tries to call. (Step S301) Then, the control part 21 senses it. (StepS302) Atthistime, aparticularsignalmaybeinputted to the wired telephone to inform that this call is directed to the other wired telephone connected to the system 100.

Then, the control part 21 controls the exchange part 23 to switch the wired telephone trying to call. (Step S303) Also the control part 21 operates the decoder 24. (Step S304) When the user of the wired telephone trying to call inputs the object wired telephone number (Step S305), DTMF signal of the object wired telephone number is delivered to the decoder 24 through the exchange part 23 and decoded into data. (Step S306) The control part 21 reads the object wired telephone number data and identifies the object wired telephone (Step S307) and judges whether the object wired telephone is in use. (Step S308) If the object wired telephone is in use, the control part 21 controls the announcement part 25 to deliver the line-busy signal to the wired telephone trying to call. (Step S309) If the object wired telephone is not in use, the control part 21 switches the object wired telephone to the exchange part 23. (Step S310) Then, the control part 21 operates the

announcement part 25 to deliver the ring to the wired telephone trying to call. (Step S311) The object wired telephone answers and the communication between them is established. (Step S312) At this time, the control part 21 senses when the object wired telephone answers and stores the time as start time of the communication in connection with the wired telephone trying to call. (Step S313) When either of the wired telephones finishes the communication (that is hook on) (Step 34 or 314'), the control part 21 senses it and breaks the switch of them to the exchange part 23. (Step S315 and 315') At this time, the control part 21 senses the finish of the communication and stores the finish time of the communication in connection with the wired telephone trying to call. (Step S316) Then, the control part 21 measures the communication time according to the star and finish time of the communication and stores the communication time. (Step S317) The control part 21 stores the communication time with respect to the respective wired telephone as described above. At this time, the control part 21 may have a database and stores the communication time with respect to the respective wiredtelephone to the database as shown in Fig. 5.

The data of the communication time with respect to the respective wired telephone is sent to the common carrier. Then, the common carrier charges to the respective wired telephone for its use based on the communication time.

In the present invention, the communication time data is

delivered to the communication module and the communication module sends the data to the common carrier. At this time, it is desirable if the communication time data for the respective wired telephone which the control part stores are sent to the common carrier periodically.

In order to send the communication time data for the respective wired telephone to the common carrier, the control part 21 firstly searches the communication modules to find out a resting module (that is not in use). (Step 5318) And, the control part 21 inputs the communication time data to the respective wired telephone to the found communication module. (Step S319) For example, the control part 21 and the wireless communication module are connected by RS 232C so that the control part 21 can deliver the data to the resting communication module.

As shown in Fig. 2, a plurality of the systems 100 making use of the wireless communication network 300 may be equipped.

In this case, the different wired telephones belonging to different system may have the same telephone number. In the wired telephones belonging to the same system have the different telephone numbers. However, if the system is different, it is possible for the different wired telephones to have the same telephone number. Accordingly, the switching center 350 of the wireless telephone communication network 300 should be able to identify a wired telephone although its same telephone number for the charge.

Fig. 8 shows type of the data which the control part 21 delivers to the communication module.

In case of Fig. 8 (a), the control part 21 delivers data including header information, telephone number of the wired telephone and the communication time to the wireless communication module. At this time, the switching center 350 should remember the telephone number of the wireless communication module usable to the respective wired telephone.

For example, the wireless communication module telephone numbers usable by the respective wired telephone are constructed to database. Then, the switching center 350 can distinguish the same wired telephone number by the wireless communication module numbers.

In case of Fig. 8 (b), the control part 21 delivers data <BR> <BR> <BR> <BR> <BR> includingsystem distinguish number aswellasheaderinformation, telephone number of the wired telephone and the communication time to the wireless communication module. At this time, the switching center 350 should remember the system distinguishing number to which the respective wired telephone belongs.

Accordingly, the switching center 350 can distinguish the same wired telephone number by the system distinguish number. At this time, the control part 21 stores the system distinguish number for the wired telephones.

The wireless communication module receiving the data including the communication time for the respective wired telephone sends the telephone signal to the base station of the wireless communication network 300. (Step S320) At this time, the wired telephone number and the communication time thereof or the wired telephone number, the communication time thereof

and the system distinguish number are recorded on the readily defined protocol field and they are sent.

In this case, as an example, the communication time data for the respective wired telephone sent to the base station may be delivered to the common carrier in the form of facsimile or to a charge database server placed on the switching center 350 through Internet. Fig. 7 shows configuration in this case.

The communication time data for the respective wired telephone sent to the base station 310 of the wireless telephone communication network 300 fromthewireless communication module may be sent to the facsimile machine 350 of the common carrier via the PSTN 200 through the control station 330 and the switching center 350 of the wireless telephone communication network 300.

The communication time data for the respective wired telephone sent to the base station 310 of the wireless telephone communication network300from the wirelesscommunication module may be sent to the charge database server via Internet 500 and the IWF (Interworking Function) 400 through the control station 330 and the switching center 350 of the wireless telephone communication network 300.

The common carrier received the communication data for the respective wired telephone charges to the respective wired telephone based on the data.

Fig. 4 shows flow chart of the control part 21 when the control part 21 gets the communication time information for the respective wired telephone.

Firstly, the object wired telephone answers and the control

part 21 senses it. (Step S401) And, the control part checks the start time of the communication and stores it. (Step S402) Then, either of the telephones finishes the communication, the control part senses it (Step S403) and checks the finish time and stores it. (Step S404) Then, the control part 21 measures the communication time between the start time and the finish time and store it with respect to the wired telephone used for the call. (Step S405) Fig. 6 shows a flow chart of the control part 21 when the control part 21 periodically delivers the communication time data for the respective wired telephone and, accordingly, the communication module transmits the data to the switching center 350.

Firstly, the control part 21 checks whether the period comes.

(Step S601) If the period comes, the control part 21 searches the wireless communication modules to find out a communication module which is not in use. (Step S602) The control part 21, then, delivers the communication time data to the respective wired telephone to the found resting wireless communication module. (Step S603) Then, the control part 21 let the wireless communication module send the communication data of the respective wired telephone to the switching center 310 of the wireless telephone communication network. (Step S604) INDUSTRIAL APPLICABILITY As described above, the present invention provides a system

and a method by which the charge is possible for calls between the wired telephones connected to the wired telephone communication system by means of the wireless communication modules.

Accordingly, it is understood that the purpose of the present invention is accomplished. The present invention is described with reference to the specific embodiments, but the invention <BR> <BR> isnotlimitedthereto. Onlythefollowingclaimswilldetermine the scope of the invention.