MXPA98002516A - Method for transmission and reception of information at high speed - Google Patents

Abstract

A digital access system (5,50,500,500) includes a pair of Digital Subscriber Line modems (16, 17), for high-speed data transmission in updraft, through a double crossed cable (15), from a central office (11) and a customer's premises (10). The voice band signals, originating in the customer premises, can be transmitted through the same double cable, to inject the signals at a frequency below the frequency of the data transmitted by the Digit Subscriber Line modems.

Description

METHOD FOR TRANSMISSION AND RECEPTION OF INFORMATION AT HIGH SPEED Technical Field This invention relates to a technique for high-speed voice and data communication.

Art Background The proliferation of the INTERNET, as well as the "on-line" property services, have urged the demand to at least download information at high speed ranges. With this, today's voice modems now provide data transfer rates of up to 56 Kbs. In conventional telephone lines. Data transfer ranges of 128 Kbs., Can be obtained, using special services such as those of the Integrated Services Digital Network (ISDN). Thus, even higher speeds, of up to 10 to 27 Mbs. they can be obtained using a coaxial cable. Generally, the downstream transmission range of information transmission is more critical than the upstream information. Most online users tend to download large documents, compared to documents uploaded to the control terminal. For this reason, users prefer high transmission rates, downstream.

REF: 26846 U.S. Patent No. 5,347,304, discloses a technique for transmitting information at high speed from the control terminal to the customer, in downstream, by means of a coaxial cable. A cable television modem, in the control terminal, modulates the relevant information for the downstream client, on a standard 6 MHz channel, to be transmitted on the coaxial cable. At the customer's premises, another cable television modem demodulates the downstream information. The upstream information, from the client's premises, is modulated on a double crossover cable through a conventional voiceband modem, for demodulation in the office of the Information Service Provider (Jnfor-ipation Service Provider, ISP). ). Using a low-speed upstream path, the client can notify the Information Service Provider's central office, to download information through the coaxial cable at relatively high speed. While the production disclosed in US Pat. No. 5,347,304 achieves high-speed data transmission from a master control to a downstream client, the technique has the disadvantage of requiring two separate transmission paths.

Thus, a customer needs to obtain a coaxial cable link, through a cable television service provider, for the downstream data transmission and a cross double cable, from a telephone company, for upstream transmission.

Brief Summary of the Invention Briefly, according to a preferred embodiment, a method is provided for transmitting high-speed downstream data on a pair of wires from a control terminal, to a customer's premises and transmit upstream data at high speed on the same double cable from the customer's premises, to the control terminal. According to the method, a Digital Subscriber Line (DSL) modem in the control terminal modulates digital signals, in wave signals, for high-speed transmission through the double cable, up to the customer premises, where the second DSL modem demodulates the wave signals in digital signals. The voice band information in the customer premises is placed in the same double cable, to be transmitted to the control terminal at a frequency below that of the downstream information, modulated in the double cable, by the Digital Subscriber Line modems. Voice information typically originates from a telephone station apparatus at the customer premises. Analog voice information, it can be put in the double cable through a first filter, in the client's premises, to be removed in the control terminal through a second filter and vice versa. Alternatively, the voice information can be digitized, through an encoder / decoder or the like, at the customer premises, to be transmitted digitally by the double cable, to the control terminal. The voice information may also include digital information, modulated in voice band signals, through a voice band modem in the customer's premises, to be transmitted analogously or digitally, to the control terminal in the manner already described. . In this way, a customer can send information at relatively low speeds (ie, 28 Kbs.), To the control terminal, to initiate a data call, authenticate a transaction, or upload e-mail or small files, while enjoying a relatively fast downstream data transmission (up to 8 Mbs, or even 25 Mbs.), from the control terminal, through the same double cable.

Brief Description of the Drawings FIGURE 1 shows a schematic block diagram of a first access system, in accordance with the invention, to achieve data and voice transmissions, of bidirectional Digital Subscriber Line, on a single double cable; FIGURE 2 shows a schematic block diagram of a second access system, according to the invention, for data and voice transmissions, of a hybrid Digital Subscriber Line, on a single double cable; FIGURE 3 shows a schematic block diagram of a second access system, according to the invention, for data transmissions and digitized voice transmissions, of Digital Subscriber Line, on a single double cable; and FIGURE 4 shows a schematic block diagram, of a second access system, according to the invention, for data transmission, of Hybrid Digital Subscriber Line, on a single double cable and voice transmission, through another communication channel.

Detailed description FIGURE 1 illustrates a functional block diagram of a first Digital Subscriber Line 5 access system, according to the invention, for exchanging information between a customer premises 10 and a central office 11, maintained by a provider of telecommunication services. The premises of the client 10 may be a house or office, located where there is a digital apparatus 12, such as a personal computer or a Set-Top Box, and a telephone station apparatus, analogous 14. For purposes of the invention, a The customer premises 10 exchanges both data and voice information, with the head office 11, on at least one double cable 15, typically a double crossover cable. To exchange the data, the premises of the client 10 must include a Digital Subscriber Line 16 modem, linked to the digital apparatus 12 through an internal bus, a parallel port connection, or a Base-T interface. The modem Digital Subscriber Line 16 works and serves to modulate the digital signals from the digital apparatus 12, up to the double cable 15, to transmit it to the central office 11, as well as to demodulate the signals received from the central office 11, on the same double cable. Digital Subscriber Line modems are well known in the art and provide high-speed digital data transmission and reception, modulating and de-modulating said data at frequencies above 3 KHz, which is the frequency at which modems of conventional grade, operate. To communicate with the Digital Subscriber Line 16 modem at the customer premises 10, the head office 11 includes at least one Digital Subscriber Line 17 modem, connected to the opposite side of the double cable 15. In practice, the Central office 11, serves a plurality of customer premises, each served with at least one double cable 15. With this, central office 11 typically includes a plurality of Digital Subscriber Line 17-17 modems, each available to connect to a double 15 cable, serving customer premises 10 separately. The outputs of the Digital Subscriber Line 17-17 modems are connected through a multiplexer / router 20, to transmit on trunks 22, typically having DSl, DS3 or 0C3 bandwidths, to a Data Network, Information or an INTERNET service provider. The nature of the multiplexer / router 20 will depend on the nature of the output interface associated with the Digital Subscriber Line 17-17 modems. In the illustrated embodiment, each Digital Subscriber Line 17 modem has an Ethernet Base-T interface 10, where it is the case that the multiplexer / router 20 acts as a router, to route the signals on the trunk lines. 22. Digital Subscriber Line 17-17 modems may employ other output data protocols: such as a frame relay, ATM or FDDI; to create time-division multiplexed signals (in which it is the case, that the multiplexer / router 20 acts as a TDM multiplexer), or multiplexed signals in packet, where the multiplexer / router 20 can be a multiplexer of package, router or switch.

In the Digital Subscriber Line 5 access system shown in FIGURE 1, the Digital Subscriber Line 16 modem and the Digital Subscriber Line 17 modem, at customer premises 10, possess the ability to transmit and receive data at relatively high speeds, through the double cable 15. In practice, said transmission speeds can be obtained as long as the following restrictions are met: l.The distance between the premises of the client 10 and the central office 11, must be relatively short (ie 3 to 5 km.), depending on the meter of the double cable 15 and the transmission speed of the modems. 2. No type of electronic devices involved, or charging springs, shall be present between the Digital Subscriber Line modems 16 and 17. 3. There is a limited number of bridged sockets in the circle between the modems.

If any of these restrictions are not covered, digital access technology, such as an IT line or a radio channel, will be necessary instead of the double cable 15.

According to the present invention, the same double cable 15, which carries the data between the premises of the client 10 and the central office 11 can thus also carry data information simultaneously. With this, the voice signals coming from the telephone station apparatus, analog 14 at the premises of the customer 10, are deposited on the double cable 15, through a filter 24 at a frequency below the frequency at which the Digital Subscriber Line modems modulate the data towards the double crossed cable. Typically, the modems shown in FIGURE 1, modulate the data at a frequency above 3 KHz. Thus, voice traffic, of the type associated with the Old Telephone Service Plain (POTS), which operates in a conventional frequency range (ie, below 3 KHz.), Can be injected into a double cable 15 by a filter 24 according to the present invention. In the central office 11, a filter 26 serves to extract the voice information from the double 15 upstream cable associated with the Digital Subscriber Line 17-17 modems, serving the double cable 15. The voice information extracted by the filter 26, is taken to trunk 28, to a voice network, as maintained by the Local Access Provider. The voice signals of the Old Ordinary Telephone Service of other telephone stations, (not shown), can also be received in the central office 11, to be transmitted in the last trunk 29 of the voice network. As can be seen now, when the voice information in the double cable 15 is transmitted at a frequency below the data modulation frequency made by the Digital Subscriber Line modems 16 and 17-17, the double cable can be made to carry both voice and data at high speed. FIGURE 2 shows a Hybrid Digital Subscriber Line access system 50, for data transmission, similar to the Digital Subscriber Line 5 access system of FIGURE 1. Because of this, similar elements have been illustrated by numbers similar reference Thus, the Hybrid Digital Subscriber Line 50 access system includes Digital Subscriber Line modems 16 and 17-17, at customer premises 10 and central office 11, respectively, to enable downstream data transmission. at high speed, from the central office 11 to the customer premises 10. As the Digital Subscriber Line 5 access system of FIGURE 1, the Hybrid Digital Subscriber Line 50 access system of FIGURE 2, includes a filter 24 in the premises of the client 10, for separating the voice information in the double cable 15 at a frequency below the modems of Digital Subscriber Line 16 and 17-17. The Hybrid Digital Subscriber Line 50 access system of FIGURE 1, also includes, a filter 26 in the central office 11 for extracting the voice information, for transmission to the trunk voice network 28. In contrast to the Digital Subscriber Line 5 access system of FIGURE 1, the Digital Subscriber Line 16 modem in the customer premises 10 of the Hybrid Digital Subscriber Line access system 50 of FIGURE 2, only possesses the ability to receive data, providing a cost saving, over the Internet modem of Digital Subscriber 16 of FIGURE 1, which has both transmission and transmission capabilities. Typically, central office 11 has the Digital Subscriber Line 17-17 modems, which support the transmission ability only, in addition to reducing costs. To achieve the premises of the clients 10 an upstream data transmission capacity, a voice band modem 30, of the type well known in the art, either internal or separate from the digital apparatus 12, modulates the digital signals upstream of the digital apparatus 12 of the client, in analog signals. These analog signals modulated in the voice band, by means of the modem 30, are input to the filter 24, for transmission through the double cable 15 of the central office 11. In the central office 11, the analog signals modulated in the voice band , are extracted by the filter 26 of FIGURE 3, to be transmitted to the trunk 28, to a group of conventional voice band modems, from the same information provider, supplying data to the client's premises 10. As previously discussed, voiceband modems, of the type of which are comprised by modem 30, typically reach a transmission speed of 9.6 to 56 Kbs. This speed is generally satisfactory for upstream data transmission, since most of the clients upload relatively small files, comparing them with the large files that are commonly downloaded. Thus, in accordance with the Hybrid Digital Subscriber Line 50 access system of FIGURE 2, large files can be downloaded quickly, through the Digital Subscriber Line 17 modem located in central office 11 of FIGURE 2 , to the modem of Digital Subscriber Line 16 of only reception, in the premises of the client 10. At the same time, the voice information of the analogue telephone device 14, or the upstream data of the digital apparatus 12, modulated in band of voice, through the modem 30, can be sent by the double cable 15, through the filter 24, to receive them in the central office 11. In this way, the access system of the Hybrid Digital Subscriber Line 50 of the FIGURE 2, it can reach a high speed in the transmission of data from the central office 11, to the premises of the client 10, as well as the upstream voice transmission, from the digital apparatus 12 of the client. FIGURE 3 illustrates a third digital access system 500, for voice and data transmission, similar to access systems 5 and 50, of FIGURES 1 and 2, respectively. Because of this, similar elements have been illustrated by similar reference numbers. Thus, the access system 500, includes the Digital Subscriber Line modems 16 and 17-17 in the premises of the client 10 and the central office 11, respectively, to enable the transmission of data at high speed in downstream from the central office 11 to the premises of the client 10, through the double cable 15. As the hybrid Digital Subscriber Line access system 50 of FIGURE 2, the Digital Subscriber Line modem 16 is connected to the digital apparatus 12 in the local of the client 10, only that the access system 500 of FIGURE 3, is only of reception. Thus, as the Hybrid Digital Subscriber Line 50 access system of FIGURE 2, the Digital Subscriber Line access system 500 of FIGURE 3, includes a voice band modem 30, for modulating the digital signals of the digital apparatus 12 of the client, in digital signals, for the upstream transmission to the central office 11, through the double cable 15. In contrast to the Hybrid Digital Subscriber Line 50 access system of FIGURE 2, Digital Subscriber Line 500 access system of FIGURE 3, includes an encoder / decoder (CODEC) 32, connected to both the analog telephone apparatus 14, as to the voice band modem 30, to digitize this signal, to input it through the Digital Subscriber Line modem 16, to the double cable 15, or on a second double cable 3 (shown with phantom line). The encoder / decoder 32 can also digitize the voice information from the analog telephone apparatus 14 (as well as other devices (not shown)), to enter them through the Digital Subscriber Line 16 modem to transmit them on one of the double cables 15 and 33, instead of transmitting the voice information as an analogous signal through the filter 24. For this reason, the filter 24 of the premises of the client 10 (as well as the filter 26 of the central office 11), are illustrated in FIG. ghost line, because these elements can be deleted if the voice information, can be digitized through the encoder / decoder 32. When the voice information is digitized through the encoder / decoder 32, and is entered into the cable double 15 or double cable 33, digitized voice information, will be received in one of the modems of Digital Subscriber Line 17-17, in the central office 11. The modems of Subs Line Digital crypto 17-17, demodulate the digitized voice information and provide the information as a DSO signal (64 Kbs.) on the trunk 34. These voice signals are supplied, along with the voice signals in the Telephone Service trunks Old ordinary 28 and 29, to the voice network, or group of modems, of an information service provider. Alternatively, the voice signals received and extracted through the filter 26 can be multiplexed together with other voice signals to form a DSl signal. Alternatively, voice signals can be packaged and routed to a data network. As can be seen, the Digital Subscriber Line 500 access system performs advantageously, the voice transmission through the encoder / decoder 32, while the downstream data transmission is provided through the Line modems. of Digital Subscriber 16 and 17, as previously discussed. Furthermore, the digitization of the voice information by the encoder / decoder 32 has the ability to support multiple voice signals separately, in contrast to the ability of the filters 24 and 26 to support a single signal. The Hybrid Digital Subscriber Line 50 access system of FIGURE 3 typically uses a single double cable 15 to transmit the data between the Digital Subscriber Line modems 16 and 17. In certain circumstances, the download data from the central office 11, to the premises of the client 10, through the double cable 15 and upload the data through the double cable 34. The voice data can be transmitted through the double cable 34, or through the double cable 33, dedicated for said voice band information. FIGURE 4 illustrates a fourth digital access system 5000, for voice and data transmission, similar to access systems 5, 50 and 500 of FIGURES 1, 2 and 3, respectively. Because of this, similar elements have been illustrated by similar reference numbers. Thus, for example, the Digital Subscriber Line 5000 access system, includes the Digital Subscriber Line modems 16 and 17-17 at the premises of the client 10 and the central office 11, respectively, to enable high transmission rates. Downstream data from the central office 11, up to the premises of the client 10. As the access system 50 and 500 of FIGURES 2 and 3, the Digital Subscriber Line 16 modem, connected to the digital device 12 in the premises of the client 10, within the access system of Digital Subscriber Line 5000 of FIGURE 4, is only receiver. Thus, as the Digital Subscriber Line access systems 50 and 500 of FIGURES 2 and 3, respectively, the Digital Subscriber Line 5000 access system of FIGURE 4 includes a voice band modem 30 for modulating the lasa digital signals from the digital apparatus 12 of the client, in analog signals for their upstream transmission to the head office 11. In contrast to the Digital Subscriber Line access systems 50 and 500 of FIGURES 2 and 3, respectively, the system Digital Subscriber Line 5000 access line of FIGURE 4 employs an alternate transmission path to transmit the voice band information to the central office 11. In a FIGURE 4 embodiment, a wireless transmitter 34 is provided to transmit the signals of voice, from the analog telephone apparatus 14 and the voice band modem 30, through a radio channel 35, to receive by means of a wireless transmitter 36 corresponding to at the central office 11. The wireless transmitter 34 at the premises of the client 10, also receives the voice band information, transmitted by the wireless transmitter 36 at the central office 11. The wireless transmitter 36 from the central office 11, is connected via a voice trunk 38 to the Voice Network or to the Modems Group of an information provider, in the same way as the Ordinary Old Telephone Service trunk 29. In this way, the voice information is communicated to the customer's premises, to the Voice Network or to the Modems Group of an information provider, while the information is transmitted from the central office, to the client's premises, through a double cable 15. It is noted that the voice information can also be communicated through the double cable 15, as previously described, through the filters 24 and 26 (illustrated with phantom line). The above, discovers a technique for transmitting information in downstream, at high speeds, from a central office 11, to a customer premises 10, through a double cable 15 and for the transmission of voice information, as well as digital signals, modulated in the voice band, from the premises of the client 10 to the central office 11, on the same double cable (or in a different channel). It should be understood that the modalities described above are merely illustrative of the principles of the present invention. Various modifications and changes can be made to this, by those experts in the art, which will modalize the principles of the invention and will fall within the spirit and field of the same. It is noted that, with regard to this date, the best method known by the requested, to carry out the present invention, is that which is clear from the present, discovering the invention. Having described the invention as above, the content of the following is claimed as property.

Claims (32)

1. A method for transmitting digital data at a high speed, from a central office, to a customer premises and to transmit voice band information from the customer's premises, to the central office, is characterized in that it comprises the steps of: • modulating at high speed, digital information in the central office, in wave signals, through a first Digital Subscriber Line modem, to transmit it to the customer's premises, on a double cable; • demodulate the wave signals at the customer premises through a second Digital Subscriber Line modem, to obtain digital signals; • transmit the voice band signals, including the digital signals, originating in the customer premises and modulated in voice band, through a voice band modem, at a frequency below, that of the modulated signals by the first Digital Subscriber Line modem, for transmission to the central office; and • extract in the central office, the voice band signals.

2. The method according to claim 1, characterized in that the voice band information is transmitted from the customer premises, by injecting the voice band information in the first double cable, through the first filter and where the voice band information is extracted in the central office through the second filter.

3. The method according to claim 1, characterized in that the voice band signals are transmitted in a double cable, same as in the digital signals at a baseband frequency corresponding to the conventional frequency range of the Old Ordinary Telephone Service .

4. The method according to claim 1, characterized in that the voice band signals are transmitted on a double cable, different from that of the digital signals at a baseband frequency, corresponding to the conventional frequency range of the Telephone Service. Ancient Ordinary

5. The method according to claim 1, is characterized in that the digital signals originating in the customer premises, are generated in a digital device, at the customer premises, to make a call and support the low speed transmission of the signals digital, to an information service provider.

6. The method according to claim 5, characterized in that the digital signals also include user data, communicated to the information service provider.

7. The method according to claim 1, characterized in that the speech band information is comprised by voice band signals generated by a telephone station apparatus.

8. The method according to claim 1, characterized in that the second Digital Subscriber Line modem, in the customer's premises, modulates at high speed the digital data, originated in the client's premises, in high-wave signals. speed, where the first Digital Subscriber Line modem in the central office, demodulates the wave signals, received from the customer premises, into digital signals.

9. The method according to claim 8, characterized in that the digital signals originate from a digital device, at the customer premises.

10. The method of compliance with the claim 9, is characterized in that the wave signals, produced by the second Digital Subscriber Line modem, are transmitted on a second double cable, to the central office.

11. The method according to the claim 1, is characterized in that the voice band signals are transmitted to the central office, by first digitizing the voice band signals by means of an encoder / decoder and then passing the digitized signals, in the second double cable, by means of the First and Second Digital Subscriber Line Modem, which separate the digitized vox band signals.

12. The method according to claim 11, characterized in that the voice band signals include the voice band signals, originating in the customer premises, modulated in voice, through a voice band modem. .

13. The method according to claim 11, characterized in that the digital signals are generated in a digital device at the customer premises, to carry out a call, to the information service provider.

14. The method according to claim 13, characterized in that the digital signals also include the user data, communicated to the information service provider.

15. The method according to claim 11, characterized in that the voice band signals, include the speech band signals, generated by the telephone station apparatus.

16. The method according to claim 11 is characterized in that the speech band signals are transmitted on the first double cable.

17. The method according to claim 1, characterized in that the voice band signals are transmitted between the customer premises and the central office, on a second double cable.

18. The method according to claim 1, characterized in that the voice band signals are transmitted between the customer premises and the central office, on a radio channel.

19. An apparatus for high-speed transmission of information, from a central office and a customer premises and to transmit voice band information, from the customer's premises, to the central office, characterized in that it comprises: • a first double cable connecting to the client's premises and the central office; • a first Digital Subscriber Line modem in the central office, to modulate at high speed, digital signals in the central office, in wave signals, to be transmitted along the first double cable, to the client's premises; • means at the customer premises, to originate voice band signals, including digital signals modulated in the voice band at a frequency below the frequency of the signals modulated by the first Digital Subscriber Line modem, for be transmitted to the central office; • means at the customer premises, to inject voice band signals, into a communication channel, for transmission to the central office; and • means in the central office, to extract the voice band signals.

20. The apparatus according to claim 19, characterized in that the means in the customer premises to originate the voiceband signals, include a telephone set.

The apparatus according to claim 19, characterized in that the means for originating voiceband signals, include a personal computer and a modem in the voiceband, to modulate the digital signals from the computer, up to the Voice band

22. The apparatus according to claim 19, characterized in that the communication channel comprises a first double cable.

23. The apparatus according to claim 22, is characterized in that the means in the customer premises, for injecting the speech band signals into the communication channel, comprises a first filter.

24. The apparatus according to claim 23 is characterized in that the means in the central office, for extracting the speech band signals, include a second filter.

25. The apparatus in accordance with the claim 19, is characterized in that the means at the customer premises for injecting the voiceband signals into the communication channel comprises a first encoder / decoder.

26. The apparatus in accordance with the claim 25, is characterized in that the means in the central office, for extracting the speech band signals, from the communication channel, comprises a second encoder / decoder.

27. The apparatus in accordance with the claim 19, characterized in that the communication channel comprises a second double cable

28. The apparatus according to the claim 27, is characterized in that the means in the customer premises, for injecting the voice band signals into the communication channel, comprise a first filter.

29. The apparatus in accordance with the claim 28, is characterized in that the means in the central office, for extracting the speech band signals, include a second filter.

30. The apparatus according to claim 27, is characterized in that the means in the customer's premises for injecting the speech band signals into the communication channel comprise a first encoder / decoder.

31. The apparatus according to claim 30, characterized in that the means in the central office, for extracting the voice band signals, from the communication channel, comprise a second encoder / decoder.

32. The apparatus according to claim 19, characterized in that the communication channel is comprised by a radio channel.