KR100828465B1 - Method and system for transparently determining call service options - Google Patents

Abstract

System and method for transparent determination of call service options in a wireless communication system. The present invention initiates a call by default as a voice call. Then, detectors are placed to detect tones peculiar to facsimile calls and data calls. If a fax call or data call is detected, the call is renegotiated into a fax call or a data call, respectively. If no facsimile call or data call is detected, the call remains a voice call. The detection of the facsimile tone can be performed at the call originating party and the call receiving party. The detection of the data tone can be performed only at the call receiving side. To detect the facsimile call, a call tone detector is implemented at the call receiving side and a call tone detector is implemented at the call originating side. The call tone for the facsimile machine is a combination of a 2100 hertz tone followed by a V.21 signal with a 0x7e data pattern, or a single V.21 signal with a 0x7e data pattern. The toning order for a facsimile machine is 1100 hertz, pure. To detect a data call, a call tone detector is implemented at the call receiving side. The called tone for the data modem is the combination of the V.25 signal with the next modem tone, a single V.25 signal, or modem tones.

Call service option, transparent decision

Description

Methods and systems for transparently determining call service options {METHOD AND SYSTEM FOR TRANSPARENTLY DETERMINING CALL SERVICE OPTIONS}

Background of the Invention

1. Field of Invention

The present invention relates generally to the field of communications. More specifically, the present invention relates to systems and methods for transparently determining call service options. The present invention also relates to a system and method for transparently determining call service options in a wireless communication system.

2. Related Technology

Various multiple access communication systems have been developed for transferring information between multiple system users. Two known techniques used by such multiple access communication systems include time division multiple access (TDMA) and frequency division multiple access (FDMA), the basic principles of which are known in the art. However, like code division multiple access (CDMA) spread-spectrum technology, spread-spectrum modulation technology has significant advantages over other modulation methods, especially when serving multiple communication system users. An example of the use of CDMA technology in a multiple access communication system is U.S. Patent No. 4,901,307, issued February 13, 1990, assigned to the assignee of the present invention and entitled "SPREAD SPECTRUM MULTIPLE ACCESS COMMUNICATION SYSTEM USING SATELLITE OR TERRESTRIAL REPEATERS". And US Patent No. 08 / 368,570, filed Jan. 4, 1995 entitled "METHOD AND APPARATUS FOR USING FULL SPECTRUM TRANSMITTED POWER IN A SPREAD SPECTRUM COMMUNICATION SYSTEM FOR TRACKING INDIVIDUAL RECIPIENT PHASE TIME AND ENERGY." have.

The patent applications described above are multiple access communications in which a number of general mobile or remote system users or subscribers each use one or more subscriber units to communicate with users of other connected systems or subscribers of another system, such as a public switched telephone network. Starting the system. The subscriber unit communicates via a base station or gateway and satellite repeater using CDMA spread-spectrum type communication signals.

At present, service options in the wireless system must be determined before the call is established. A single subscriber station (SSS) and base station need to know which service option to use over the wireless link. This is called non-transparent determination of call service options. Service options may include, but are not limited to, facsimile services, data services, and voice services.

The facsimile service enables accurate transmission of duplicate or copy documents between facsimile machines via the telephone network. The data service enables transmission of data between data processing devices, such as a computer having a data modem. Data modems are devices that convert digital signals into analog signals and convert analog signals into digital signals for transmission over a telephone network. Voice services enable the transmission of voice over a telephone network by converting the sound into electrical impulses. Voice service uses a vocoder to compress the voice. Vocoders include encoders and decoders. The encoder analyzes the input voice and extracts relevant parameters based on the human voice generation model. The decoder synthesizes the speech using the parameters received from the encoder via the transmission channel.

Non-transparency requires the allocation of additional resources. Additional resources may include separate directory numbers for each service. In mobile-to-ground calls (i.e. calls initiated via wireless communication signals from a mobile unit and completed over the landline), a user who wants to access a particular service option may have a specific prefix (e.g. on a telephone, data modem or fax machine) prefix). The system then cues off the dialed prefix to see what type of call is being made. In land-to-mobile calls (ie, calls initiated via landline and completed through wireless communication signals), a user who wants to access a particular service option has three specific directory numbers: directory numbers for facsimile calls and data. One of the directory number for the call and the directory number for the voice call can be dialed. To do this, the mobile user needs to have a separate directory number for each service option. Alternatively, in a land-to-mobile call, a user who wants to access a particular service option can use two-step dialing. For two-stage dialing, the user hears the first dial tone and then dials the first number to hear the second dial tone. The first number allows the user to dial into the base station. Then, when the second dial tone is heard, the user dials the second number. By the second number, the user is connected to the desired service option.

What is needed is a system and method for providing transparent determination of call service options. There is also a need for a system and method for providing transparent determination of call service options without the need for additional resources to be allocated.

Summary of the Invention

The present invention satisfies the above mentioned needs by providing a transparent decision of the call service option. According to the present invention, no user intervention is required. According to the method of the present invention, all wireless calls are initiated by default for voice calls. Thereafter, detectors are placed to detect tones specific to the facsimile call and data call. If a fax call or data call is detected, the wireless call is renegotiated into a fax call or a data call, respectively. If no facsimile call or data call is detected, the wireless call remains a voice call.

The detection of the facsimile tone may be performed at the call originating side or the call termination side. The detection of the data tone can be performed only at the call receiving side. In order to detect a facsimile call, a called tone detector is implemented at the call receiving side, and a calling tone detector is implemented at the call originating side. The called tone for the facsimile machine is a combination of a 2100 hertz tone followed by a V.21 signal with a 0x7e data pattern or a single V.21 signal with a 0x7e data pattern. The toning order for a facsimile machine is a pure 1100 hertz. For detection of a data call, a call tone detector is implemented at the call receiving side. The called tone for the data modem is the combination of the V.25 signal with the next modem tone, modem tones or a single V.25 signal. The V.21 and V.25 signals are well known standard signals established by the International Telecommunication Union (ITU).

According to the present invention, no additional resources need to be allocated. The present invention uses a single directory number for all service offerings. One directory number is used to transparently connect voice calls, facsimile calls, and data calls.

Hereinafter, with reference to the accompanying drawings, not only the structure and operation of the various embodiments of the present invention, but also other features and advantages of the present invention will be described in detail.

Brief description of the drawings

BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are incorporated herein and form a part of the specification, illustrate the invention, are useful in describing the principles of the invention in conjunction with the description, and may help those skilled in the art to make and use the invention.

1 is a diagram illustrating a land-to-mobile call according to an embodiment of the present invention.

2 is a diagram illustrating a mobile-to-land call according to an embodiment of the present invention.

3 is a diagram illustrating a mobile-to-mobile call according to an embodiment of the present invention.

4 is a diagram illustrating another embodiment of a telecommunications network that can implement the present invention.

5A is a ground to mobile call diagram illustrating a detection signal used for transparent determination of a fax call.

FIG. 5B is a mobile to land call diagram illustrating a detection signal used for transparent determination of a fax call. FIG.

FIG. 5C is a mobile to land call diagram illustrating a detection signal used for transparent determination of a fax call. FIG.

FIG. 5D is a mobile to mobile call diagram illustrating a detection signal used for transparent determination of a fax call. FIG.

6A is a ground to mobile call diagram illustrating a detection signal used for transparent determination of a data call.

6B is a mobile to land currency diagram illustrating a detection signal used for transparent determination of a data currency.

FIG. 6C is a mobile to mobile call diagram illustrating a detection signal used for transparent determination of a data call.

FIG. 6D is a mobile to mobile call diagram illustrating a detection signal used for transparent determination of a data call. FIG.

7 is a flowchart illustrating a method for providing transparent determination of a call service option at a receiving side in accordance with the present invention.

8 is a flowchart illustrating a method for providing transparent determination of a facsimile call service option at an originating party in accordance with the present invention.

Hereinafter, the features, objects, and advantages of the present invention will be described in detail with reference to the drawings, wherein like reference numerals denote like elements. In these drawings, the same reference numbers refer to the same, functional and / or structurally similar components. The leftmost digit of the reference number indicates the drawing in which the component first appeared.

Detailed description of the preferred embodiments

While the invention has been described with reference to exemplary embodiments for a particular use, the invention is not so limited. Those skilled in the art will recognize additional fields, applications, and embodiments that fall within the scope of the present invention, as well as additional fields in which the present invention may be used.

The present invention can be applied to use in various forms of wireless communication systems. The preferred mode of operation is a CDMA system. However, the principles of the present invention can be readily applied to use in TDMA or other forms of wireless communication systems.

The present invention is used in a wireless communication system in which one or more terminals are one of a mobile station, a portable station or a fixed wireless subscriber station. For purposes of illustration, all of these types of wireless terminals may be referred to as "mobile stations". For conventional non-transparent determination of the call service option for a wireless system call, the call service option needs to be known before establishing the call. A user with a telephone, a facsimile machine, and a data modem connected to a personal computer (PC) must have separate telephone directory numbers to identify the call option prior to the establishment of the call.             

The present invention is a system and method for transparent determination of call service options. According to the present invention, no user side intervention is required. According to the present invention, there is no need to have separate telephone directory numbers for each call service option. By using a similar type of device, such as a single subscriber station (SSS), centralized subscriber station (CSS), or customer self-contained device (CPE), users are assigned to an SSS that enables communication with telephones, facsimile machines, and data modems. It can have one phone directory number.

1 is a diagram illustrating a land-to-mobile call according to an embodiment of the present invention. The telecommunications network 100 includes an SSS 110 having a first antenna 112, a base station 116 having a second antenna 114, and a public switched telephone network (PSTN) 118. SSS 110 may be connected to first telephone 102, first data modem 104, and first facsimile machine 108. Also, the first data modem 104 is connected to the first computer 106. Each of telephone 102, data modem 104 and facsimile machine 108 is connected to SSS 110 using an RJ-11 connection 130. The PSTN 118 may be connected to one of the second telephone 120, the second fax machine 122, or the second data modem 124. Also, the second data modem 124 is connected to the second computer 126. Each of telephone 120, facsimile machine 122 and data modem 124 is connected to PSTN 118 using RJ-11 connection 130 (indicated by the brother). The first computer 106 and the second computer 126 can be all kinds of computers. For example, the first computer 106 and the second computer 126 can be a desktop computer, a laptop computer, a medium computer, or a large computer.

SSS 110 is a wireless station that provides wireless local loop service. Alternatively, a concentrated subscriber station (CSS) may be used instead of the SSS 110. CSS functions as multiple SSSs that work together in the same way as mini branch exchanges (PBXs). Base station 116 is a stationary device that enables a mobile station, such as SSS 110, to communicate with a user on the ground via a public switched telephone network (PSTN) 118 via voice service, data service, or facsimile service. Both SSS 110 and PSTN 118 include, in particular, analog-to-digital converters that convert analog signals into digital signals and convert digital signals into analog signals. PSTN 118 also provides a digital connection 128 to base station 116. Both SSS 110 and base station 116 include, in particular, a digital signal processor for transparent detection of call service options. SSS 110 and base station 116 communicate wirelessly via first antenna 112 and second antenna 114.

Arrow 128 in FIG. 1 indicates the direction of a land-to-mobile call in the telecommunications network 100. In land-to-mobile calls, a landline user dials a directory number assigned to SSS 110, thereby making a call using one of the call service options 120, 124, or 122 (ie, voice, data, or facsimile). It starts. This call is routed to the base station 116 via the PSTN 118. PSTN 118 converts the analog waveform of the call into a digital waveform and routes the digital waveform to base station 116 via digital connection 128. Base station 116 further processes the digital waveform and wirelessly transmits the data to SSS 110 via second antenna 114. The SSS 110 receives the digital waveform through the first antenna 112 and converts the digital waveform back into analog data to establish a call. Each service 102, 104 or 108 of the receiving party rings until one of the services 102, 104 or 108 answers this call.

2 is a diagram illustrating a mobile-to-land call according to an embodiment of the present invention. Arrow 202 indicates the call direction for mobile to land call in the same telecommunications network 200 as in fact the telecommunications network 100. In a mobile to land call, the remote user dials a directory number associated with one of the telephone 120, facsimile machine 122, or data modem 124 to be connected via the PSTN 118, thereby calling the call service option 102 Initiate a call using one of (104 or 108) (ie, voice, data or facsimile). This call is routed to SSS 110 via RJ-11 connection 130. SSS 110 converts the analog waveform of the call into a digital waveform and transmits the data to base station 116 wirelessly via first antenna 112. Base station 116 receives the digital waveform via second antenna 114 and further processes this digital waveform. Base station 116 routes the digital waveform to PSTN 118. PSTN 118 converts the digital waveform back to an analog waveform and routes it to the appropriate service option 120, 122, or 124. The receiving side rings the dialed service option (120, 122 or 124).             

3 is a diagram illustrating a mobile-to-mobile call according to an embodiment of the present invention. The telecommunications network 300 has a first SSS 310 having a first antenna 312, a first base station 316 having a second antenna 314, a PSTN 318, a third antenna 322. And a second SSS 326 having a second base station 320 and a fourth antenna 324. The first SSS 310 can be connected to the first telephone 302, the first data modem 304, and the first fax machine 308. The first data modem 304 can be connected to the first computer 306. Each of the first telephone 302, the first data modem 304, and the first fax machine 308 are connected to the first SSS 310 using an RJ-11 connection 330. The second SSS 326 can be connected to one or both of the second telephone 328, the second fax machine 334, or the second data modem 330. The second data modem 330 can be connected to the second computer 332. Each of the second telephone 328, the second facsimile machine 334 and the second data modem 330 are connected to the second SSS 326 using the RJ-11 connection 330. The first computer 306 and the second computer 332 can be all kinds of computers. For example, the first computer 306 and the second computer 332 can be desktop computers, laptop computers, medium computers, or large computers.

The first SSS 310 and the second SSS 326 provide wireless local loop service. The first base station 316 is connected to the PSTN 318. PSTN 318 is connected to a second base station 320. The first base station 316 and the second base station 320 allow mobile stations, such as the first SSS 310 and the second SSS 326, to communicate voice service, data, via a public switched telephone network (PSTN) 318. A fixed device that allows communication with each other as a service or facsimile service. Both the first SSS 310 and the second SSS 326 include, in particular, an analog-to-digital converter that converts an analog signal into a digital signal and converts the digital signal into an analog signal. The first SSS 310 and the first base station 316 communicate wirelessly via the first antenna 312 and the second antenna 314 using CDMA. The second base station 320 and the second SSS 326 communicate wirelessly via the third antenna 322 and the fourth antenna 324 using CDMA.

In a mobile-to-mobile call, a user uses an SSS 301 using one of the call service options 302, 304, or 308 (ie, voice, data, or facsimile) by dialing the directory number assigned to the second SSS 326. To start a call. This call is routed to the first SSS 310 using the RJ-11 connection 130. SSS 310 converts analog data of the call into digital data and transmits this data to first base station 316 wirelessly via first antenna 312. The first base station 316 receives its digital data via the second antenna 314 and routes its analog data to the second base station 320 via the PSTN 318. The second base station 320 transmits its data wirelessly via the third antenna 322 to the second SSS 326. The second SSS 326 receives the data via the fourth antenna 324 and converts the digital data into analog data to establish a call. Each service 328, 330, and 334 on the receiving side rings until one of the services 328, 330, and 334 answers the call.             

The mobile-to-mobile call starts from SSS 326 using service options 328, 330, or 334, in a similar manner as described above, to SSS 310 for one of service options 302, 304, and 308. ), But in the reverse order.

4 illustrates another embodiment of a telecommunications network in which the present invention may be implemented. The telecommunications network 400 includes a first customer self-contained device (CPE) 410, a digital network 412, and a second CPE 414. As shown in telecommunication networks 100, 200, and 300, instead of transmitting digital signals wirelessly, telecommunications network 400 uses digital network 412 to transmit digital data. The first CPE 410 can be connected to the first telephone 402, the first data modem 404, and the first fax machine 408. The first data modem 404 is connected to the computer 406. The second CPE can be connected to the second telephone 416, the second modem 418, and the second fax machine 422. The second data modem is connected to the second computer 420. The first computer 406 and the second computer 420 can be any kind of computer, as mentioned above.

The first CPE 410 and the second CPE 414 operate similarly to the single subscriber station (SSS) 110, 310 and 326. CPEs 410 and 414 have, in particular, analog-to-digital converters and digital signal processors (DSPs) (both not shown). Analog-to-digital converters convert analog signals to digital signals and digital signals to analog signals. The DSP, in particular, implements transparent detection of call service options. The first CPE 410 is connected to the digital network 412. Digital network 412 is connected to the second CPE.

The user initiates a call from the CPE 410 using one of the service options 402, 404 or 408 by dialing the directory number assigned to the CPE 414. CPE 410 receives analog data from one of service options 402, 404, and 408. The CPE 410 converts the analog data into a digital signal, and maps the digital signal into a digital data packet transmitted through the digital network 412. The CPE 414 receives the digital packet from the digital network 412, converts the digital data back into an analog signal to be transmitted to the analog device 416, 418 or 422 on the receiving side, and establishes a call. Each service 416, 418, and 422 rings until this call answers one of the service options 416, 418, and 422.

In addition, the service option may be initiated at the CPE 414 using one of the service options 416, 418, and 422 to be completed at the CPE 410 for one of the service options 402, 404, and 408. Can be. The user can initiate a call to one of the service options 416, 418, and 422 by dialing a directory number assigned to the CPE 410. CPE 414 receives analog data from one of service options 416, 418, and 422. The CPE 414 converts the analog signal into a digital signal and maps the digital signal into a digital data packet for transmission over the digital network 412. The CPE 410 receives the digital packet from the digital network 412 and converts the digital data back into an analog signal to be sent to the service options 402, 404 and 408 on the receiving side to establish a call. do. Each service 402, 404 and 408 rings until one of the service options 402, 404 and 408 answers this call.

Although the present invention has been described using telecommunication networks 100, 200, 300 and 400, the present invention is not limited to being implemented only in these telecommunication networks. Other mobile-to-ground, land-to-mobile and mobile-to-mobile telecommunication networks may be used without departing from the scope and spirit of the present invention.

The present invention uses a detector to detect tones peculiar to facsimile calls and data calls. This detector is implemented in the DSP. As mentioned above, DSPs are found in SSSs 110, 310, and 326, base stations 116, 316, and 320, and CPEs 401, 414.

5A is a ground to mobile call diagram illustrating a detection signal used for transparent determination of a fax call. The detection of the facsimile call can be performed at both the call originating party and the call receiving party. This is because the facsimile machines 108 and 122 issue a calling tone (CNG) 502 when initiating or transmitting a call and a calling tone (CED) 504 when completing or receiving a call. The call tone (CNG) 502 produced by the facsimile machine is a pure 1100 hertz frequency tone. The called tone (CED) 504 is a pure 2100 hertz frequency tone followed by a V.21 signal. The V.21 signal is an ITU standard belonging to the broad-class ITU-T V. series modem. The V.21 signal used for facsimile transmission is a binary frequency shift keying (bfsk) at 300 bits per second with a preamble of 0x7e data patterns. The 0x7e data pattern is sent by all fax machines for approximately one second. The facsimile machine may or may not produce a pure 2100 hertz frequency tone, but always transmits a 0x7e data pattern. Thus, the detector must trigger the 0x7e data pattern of the called tone and transparently detect the calling tone of 1100 hertz on the receiving side in order to transparently detect the fax call service option on the receiving side. Both SSS 110 and base station 116 include a detector (not shown). In one embodiment of the invention, all calls begin with a voice call. The call initiated by the facsimile machine 122 produces a call tone 502. Detectors in base station 116 can detect calling tone 502. In response to the fax call, fax machine 108 issues a call tone 504. Detectors in the SSS 110 detect the called tone 504. If the detector flags the presence of a fax call, the entire call is diverted or re-negotiated with the fax service option. When service options are switched, facsimile transactions are facilitated.

5B is a mobile-to-land call diagram illustrating detection signals used for transparent determination of a fax call. The call initiated by the facsimile machine 108 produces a call tone 502. Detectors in the SSS 110 can detect the calling tone 502. Upon answering the fax call, fax machine 122 issues a call tone 504. Detectors in base station 116 detect the calling tone 504. If the detector flags the presence of a fax call, the entire call is diverted or re-negotiated with the fax service option. When service options are switched, facsimile transactions are facilitated.

5C is a mobile to mobile call diagram illustrating a detection signal used for transparent determination of a fax call. The call initiated by the facsimile machine 334 produces a call tone 502. Detectors in the SSS 326 can detect the calling tone 502. In response to the fax call, fax machine 308 issues a call tone 504. Detectors in the SSS 310 detect the called tone 504. If the detector flags the presence of a fax call, the entire call is diverted or re-negotiated with the fax service option. When service options are switched, facsimile transactions are facilitated.

FIG. 5D is a mobile to mobile call diagram illustrating a detection signal used for transparent determination of a fax call. FIG. The call initiated by the fax machine 308 produces a call tone 502. Detectors in the SSS 310 can detect the calling tone 502. In response to the fax call, the fax machine 334 issues a call tone 504. Detectors in SSS 326 detect the call tone 504. If the detector flags the presence of a fax call, the entire call is diverted or re-negotiated with the fax service option. When service options are switched, facsimile transactions are facilitated.

Mobile-to-mobile calls using a digital telecommunications network, such as telecommunications network 400, operate in a manner similar to that described above except that CPEs 410 and 414 replace SSSs 310 and 326, respectively. do.

In one embodiment of the present invention, facsimile detection is performed only at the receiving side. In another embodiment of the present invention, facsimile detection is performed on both the receiving side and the originating side.

6A is a ground to mobile call diagram illustrating a detection signal used for transparent determination of a data call. The detection of the data call can be performed only at the call receiving side. This is because the data modem only emits a data tone on the receiving side. Thus, the data modem 124 of the calling party does not emit a data tone. The receiving side emits a data tone 602. The initial tone to pay for a data call is V.25 ton. The V.25 tones are 2100 hertz tones out of phase. Modem tones can follow V.25 tones. Modem tones may include, but are not limited to, V.21, V.22 / V.22 bis, V.32 / V.32 bis, and the like, without a 0x7e pattern. Thus, the detector may trigger a V.25 data tone to transparently detect the data call service option at the receiving side.

As described above in FIG. 1, by the call originating from the data modem 124, the SSS 110 rings. SSS 110 rings each service option 102, 104, and 108. In response to the data call, data modem 104 emits a call tone 602. Detectors in the SSS 110 detect the called tone 602. When the detector flags the presence of a data call, the entire call is switched to or re-negotiated with the data service option. When service options are switched, data transactions are facilitated.

6B is a mobile to land currency diagram illustrating a detection signal used for transparent determination of a data currency. The call originating from the data modem 104 rings the data modem 124, as described above with reference to FIG. In response to the data call, data modem 124 emits a call tone 602. Detectors in base station 116 detect the called tone 602. If the detector flags the presence of a data call, the entire call is switched to or re-negotiated with the data service option. When service options are switched, data transactions are facilitated.

FIG. 6C illustrates a detection signal used for transparent determination of a data call and is a mobile to mobile call diagram starting in the direction indicated by arrow 604. The data modem 304 rings by the call originating from the data modem 330. In response to the data call, data modem 304 issues a call tone 602. Detectors in the SSS 310 detect the called tone 602. When the detector flags the presence of a data call, the entire call is switched to or re-negotiated with the data service option. When service options are switched, data transactions are facilitated.

FIG. 6D illustrates a detection signal used for transparent determination of a data call and is a mobile to mobile call diagram starting in the direction indicated by arrow 606. The data modem 330 rings by a call originating from the data modem 304. In response to the data call, data modem 330 emits a call tone 602. Detectors in SSS 326 detect the calling tone 602. If the detector flags the presence of a data call, the entire call is switched to or re-negotiated with the data service option. When service options are switched, data transactions are facilitated.

Mobile-to-mobile calls using a digital telecommunications network, such as telecommunications network 400, are similar to those described above, except that CPEs 410 and 414 replace SSSs 310 and 326, respectively. It works.

As mentioned above, in one embodiment of the present invention, all calls are initiated by default as voice calls. The call received by the SSS unit rings the respective service option connected to it. Thus, any of these services can be selected. If the call is actually a data call or a facsimile call, the call is renegotiated as a data call or a facsimile call, respectively. Otherwise, the call remains a voice call. If the call is a data call or a facsimile call and the phone answers, the call fails.

As described above, the detection of the facsimile tone can be performed at the call originating side as well as the call receiving side. The detection of the data tone can be performed only at the call receiving side.

7 is a flowchart illustrating a method for providing transparent determination of a call service option at a receiving side in accordance with the present invention. The steps of FIG. 7 may be implemented in hardware, firmware, software, or a combination thereof. The process begins at step 702, where control immediately passes to step 704.

In step 704, an incoming call is received at the receiving side. Control then passes to step 706.

In step 706, the vocoder is operated to set up the voice manipulation. Thereafter, control passes to step 708.             

In step 708, the ring of the user device rings. If the call is a land-to-mobile call or a mobile-to-mobile call, each user service option rings. If the call is mobile to land communication and the user is connected to the PSTN 118 with multiple service options, each user service option rings. Control then passes to step 710.

In step 710, the user device picks up. The pickup of the user device triggers and starts the timer T1. The timer T1 is the amount of time allocated for detecting the preamble specific to the data modem or fax during the call. Thereafter, control passes to step 712.

In step 712, the tone detectors are turned on and work with the vocoder. The tone detectors are turned on after the user device rings and after the user device picks up or responds to remove detectors triggered by the noise signal generated by the ringer. Control then passes to decision step 714.

At decision step 714, it is determined whether 2100 hertz tones are detected. If a 2100 hertz tone is detected, the call is not a voice call and must be renegotiated as a data call or facsimile call. Control then passes to decision step 716.

At decision step 716, it is determined whether 2100 hertz tones unique to the data are detected. The data-specific 2100 Hz signal is a V.25 signal. If data specific 2100 hertz tones are detected, control passes to step 718.

In step 718, the call is renegotiated as a data call.             

Returning to decision step 716, if it is determined that no data specific 2100 hertz tone is detected, control passes to decision step 720.

In decision step 720, it is determined whether a facsimile-specific preamble is detected. This facsimile-specific preamble is a 0x7e data pattern. If this facsimile-specific preamble is detected, control passes to step 722.

In step 722, the call is renegotiated as a facsimile call.

Returning to decision step 720 and if it is detected that the facsimile-specific preamble is not detected, control passes to decision step 724.

In decision step 724, it is determined whether a modem signal is detected. If a modem signal is detected, control passes to step 726.

In step 726, the call is renegotiated as a data call.

Returning to decision step 724, if no modem signal is detected, control passes to decision step 728. In decision step 728, it is determined whether the timer T1 has expired. Typically, the length of the timer T1 is 4 to 5 seconds. If the timer T1 has expired, control passes to step 730, where the call is renegotiated as a data call. If timer T1 has not expired, control returns to step 716 again.

Returning to decision step 714, if it is determined that 2100 hertz tones have not been detected, control passes to decision step 732.

In decision step 732, it is determined whether a preamble peculiar to the fax is detected. This fax-specific preamble is the 0x7e data pattern that is always present by all fax machines. If a fax specific preamble is detected, control passes to step 734. In step 734, the call is renegotiated as a facsimile call.

Returning to decision step 732, if it is determined that no fax-specific preamble is detected, control passes to decision step 736.

In decision step 736, it is determined whether a modem signal has been detected. If a modem signal is detected, control passes to step 738. In step 738, the call is renegotiated as a data call.

Returning to decision step 736, if it is determined that no modem signal is detected, control passes to decision step 740.

At decision step 740, it is determined whether the timer T1 has expired. Typically, the length of the timer T1 is 4 to 5 seconds. If timer T1 has expired, control passes to step 742. In step 742, the call is maintained as a voice call.

Returning to decision step 740, if it is determined that timer T1 has not expired, control passes to step 712.

As described above, the detection of the facsimile call can be determined by the calling party. 8 is a flowchart illustrating a method for providing transparent determination of a facsimile call service option at an originating party in accordance with the present invention. The steps of FIG. 8 may be implemented in hardware, firmware, software, or a combination thereof. The process begins at step 802, where control immediately passes to step 804.

In step 804, an outgoing call is made. Thereafter, control passes to step 806.

In step 806, the call is set up for voice manipulation by turning on the vocoder. Timer T2 is started. Timer T2 is the amount of time allocated for detecting the fax call tone. Thereafter, control passes to step 808.

In step 808, the tone detectors are turned on and operate with the vocoder. Control then passes to decision step 810.

In decision step 810, it is determined whether a fax call tone has been detected. The facsimile dial tone is 1100 hertz. If this fax call tone is detected, control passes to step 812.

In step 812, the call is renegotiated as a facsimile call.

Returning to decision step 810, if it is determined that no facsimile call tone is detected, control passes to decision step 814. In decision step 814, it is determined whether the timer T2 has expired. Typically, timer T2 is 9 to 10 seconds. If timer T2 expires, control passes to step 816.

In step 816, the tone detectors of the calling party are disabled. The call remains the default value of the voice call.

Returning to decision step 814, if timer T2 has not expired, control passes back to step 808.             

In one embodiment of the present invention, transparent detection of the call service option is performed only at the receiving side (FIG. 7). In another embodiment, transparent detection of the call service option is performed at the originating side as well as at the receiving side (FIGS. 7 and 8).

conclusion

By providing the foregoing description of the preferred embodiments, one skilled in the art can make or use the present invention. While the present invention has been specifically described and described with reference to preferred embodiments of the invention, various modifications may be made in form and detail without departing from the spirit and scope of the invention. Therefore, the scope of the present invention should not be limited by the above-described embodiments, but should be defined only in accordance with the claims.

Claims (42)

A method for transparent determination of call service options in a wireless communication system, (a) initiating a call with a voice call as a default, wherein the call triggers a predetermined timer to be started; (b) detecting tones specific to facsimile calls and data calls at a tone detector implemented in a single subscriber station (SSS), a base station or a customer self-contained device (CPE); (c) if the detecting step detects a tone specific to one of the facsimile call and the data call within the amount of time allocated by the timer, then renegotiates the call to one of the facsimile call and the data call; Doing; And (d) if the detecting step fails to detect a tone specific to one of the fax call and the data call, or if the timer expires, maintaining the call as the voice call. Method for transparent determination of options. The method of claim 1, And said detecting step further comprises detecting a facsimile tone at one of the call originating side and the call receiving side. The method of claim 1, And said detecting step further comprises detecting a facsimile tone and a data tone at the call receiving side. The method of claim 1, And the detecting step further comprises performing a detection of facsimile tones at both the call originating party and the call receiving side. The method of claim 1, And the detecting step further comprises performing the detection at a base station if the call originates from a single subscriber station (SSS) for a mobile to land call. The method of claim 1, The detecting step further comprises performing the detection at a receiving single subscriber station (SSS) for mobile to mobile calls and land to mobile calls. The method of claim 1, The detecting step further includes detecting a combination of a 2100 hertz tone and the next V.21 signal for the facsimile call, wherein the V.21 signal is binary frequency shift modulated with a 0x7e data pattern at 300 bits per second. (bfsk) A method for transparent determination of call service options. The method of claim 1, The detecting step further includes detecting a V.21 signal for the facsimile call, wherein the V.21 signal is a binary frequency shift modulated (bfsk) data pattern of 0x7e at 300 bits per second. Method for transparent determination of service options. The method of claim 1, The detecting step further includes detecting a combination of a V.25 tone and a next modem tone for the data call, wherein the V.25 tone is a phase inverted 2100 hertz tone. Way for you. The method of claim 1, The detecting step further includes detecting a V.25 signal for the data call, wherein the V.25 tone is a phase inverted 2100 hertz tone. The method of claim 10, The detecting step further comprises detecting a modem tone for the data call. The method of claim 10, The detecting step further includes detecting a modem tone for the data call, wherein the modem tone is a V.21 signal, a V.22 signal, a V.22 bis signal, a V.32 signal, and a V.32 signal. and one of the bis signals, wherein the V.21 signal is a V.21 signal without a 0x7e pattern. The method of claim 1, And said detecting step further comprises detecting a calling tone at a call originator for said facsimile call. The method of claim 1, And the detecting step further comprises detecting a call tone at a call receiving side for the facsimile call. The method of claim 1, And the detecting step further comprises detecting a call tone at a call receiving side for the data call. The method of claim 13, The calling tone is 1100 Hz tone, And the detecting step includes detecting the 1100 hertz tone at the call originator for the fax call. The method of claim 14, The called tone is a V.21 signal having a 2100 hertz tone followed by a 0x7e data pattern, And the detecting step includes detecting the V.21 signal having the 2100 hertz tone and the following 0x7e data pattern at a call receiving side for the facsimile call. The method of claim 15, The called tone is a V.25 signal followed by a modem tone, And the detecting step comprises detecting the V.25 signal and the next modem tone at the call receiving side for the data call. The method of claim 14, The called tone is a V.21 signal having a 0x7e data pattern, And the detecting step includes detecting the V.21 signal with the 0x7e data pattern at a call receiving side for the facsimile call. The method of claim 15, The called tone is a V.25 signal, And the detecting step comprises detecting the V.25 signal at a call receiving side for the data call. Means for initiating a call with a voice call as a default, wherein the call triggers a predetermined timer to be started; Means for detecting tones peculiar to facsimile calls and data calls at a tone detector implemented in a single subscriber station (SSS), base station or customer self-contained device (CPE); Means for re-negotiating the call to one of the facsimile call and the data call if the detecting step detects a tone specific to one of the facsimile call and the data call within the amount of time allocated by the timer; And Wherein the detecting step does not detect a tone specific to one of the facsimile call and the data call, or if the timer expires, means for maintaining the call as the voice call; System for decision making. The method of claim 21, And the means for detecting further comprises means for performing detection of a facsimile tone at one of the call originating side and the call receiving side. The method of claim 21, And the means for detecting further comprises means for performing detection of facsimile tones and data tones at the call receiving side. The method of claim 21, And the means for detecting further comprises means for performing detection of facsimile tones at both the call originating side and the call receiving side. The method of claim 21, And the means for detecting further comprises means for performing the detection at a base station when the call originates from a single subscriber station (SSS) for a mobile to land call. The method of claim 21, The means for detecting further comprises means for performing the detection at a receiving single subscriber station (SSS) for mobile to mobile calls and land to mobile calls. The method of claim 21, The means for detecting further comprises means for detecting a combination of a 2100 hertz tone and the next V.21 signal for the facsimile call, the V.21 signal being binary frequency shift modulated with a 0x7e data pattern at 300 bits per second. (bfsk) A system for transparent determination of call service options. The method of claim 21, The means for detecting further comprises means for detecting a V.21 signal for the facsimile call, wherein the V.21 signal is a binary frequency shift modulated (bfsk) 0x7e data pattern at 300 bits per second. System for transparent determination of options. The method of claim 21, The means for detecting further comprises means for detecting a V.25 tone and a next modem tone for the data call, wherein the V.25 tone is a phase inverted 2100 hertz tone. system. The method of claim 21, The means for detecting further comprises means for detecting a V.25 signal for the data call, wherein the V.25 tone is a phase inverted 2100 hertz tone. The method of claim 30, And the means for detecting further comprises means for detecting a modem tone for the data call. The method of claim 30, The detecting means further comprises means for detecting a modem tone for the data call, wherein the modem tone comprises a V.21 signal, a V.22 signal, a V.22 bis signal, a V.32 signal, and a V.32 signal. and one of the bis signals, wherein the V.21 signal is a V.21 signal without a 0x7e pattern. The method of claim 21, And the means for detecting further comprises means for detecting a calling tone at a call originating party for the fax call. The method of claim 21, And the means for detecting further comprises means for detecting a call tone at a call receiving side for the facsimile call. The method of claim 21, And the means for detecting further comprises means for detecting a call tone at a call receiving side for the data call. The method of claim 33, wherein The calling tone is 1100 Hz tone, And the means for detecting comprises means for detecting the 1100 hertz tone at the call originating side for the facsimile call. The method of claim 34, wherein The called tone is a V.21 signal having a 2100 hertz tone followed by a 0x7e data pattern, And the means for detecting comprises means for detecting the V.21 signal having the 2100 hertz tone and the following 0x7e data pattern at a call receiving side for the fax call. 36. The method of claim 35 wherein The called tone is a V.25 signal followed by a modem tone, And the means for detecting comprises means for detecting the V.25 signal and the next modem tone at a call receiving side for the data call. The method of claim 34, wherein The called tone is a V.21 signal having a 0x7e data pattern, And the means for detecting comprises means for detecting the V.21 signal with the Ox7e data pattern at a call receiving side for the facsimile call. 36. The method of claim 35 wherein The called tone is a V.25 signal, And said means for detecting comprises means for detecting said V.25 signal at a call receiving side for said data call. delete delete

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