CN1242598C - Fast connection parameter exchange - Google Patents

Fast connection parameter exchange Download PDF

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Publication number
CN1242598C
CN1242598C CN 01117361 CN01117361A CN1242598C CN 1242598 C CN1242598 C CN 1242598C CN 01117361 CN01117361 CN 01117361 CN 01117361 A CN01117361 A CN 01117361A CN 1242598 C CN1242598 C CN 1242598C
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modulator
frame
demodulator
modem
sequence
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CN1323125A (en
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维瑞·欧夫森
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COSTER SYSTEM Inc
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COSTER SYSTEM Inc
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Abstract

The startup, retrain, renegotiation quick connect or other processes of handshaking between communication systems involve the exchange of certain modulation, constellation, precoder, prefilter and other communication related information. The communication systems exchange one long information sequence including all the necessary communication information. Subsequently, the communication systems start transmitting short sequences, including an acknowledgement information portion. If one of the communication systems does not receive an acknowledgement within a predetermined time or event, that communication system may retransmit another long information sequence. After such retransmission, the retransmitting communication system may continue transmitting the long information sequences or may start transmitting the short sequences once again. Eventually, each of the communication systems should receive a long information sequence and acknowledge their receipt of such sequence.

Description

The modulator-demodulator of training method and this method of use
The application is the U.S. Patent application U.S.Ser.No.09/416 that submitted on October 12nd, 1999, the U.S. Patent application U.S.Ser.No.09/393 that on September 10th, 482 and 1999 submitted to, 616 part continuation application, and these back two applications are the U.S. Patent application U.S.Ser.No.09/394 that submitted on September 10th, 1999,018 part continuation application, this latter's application is again the U.S. Patent application U.S.Ser.No.09/361 that submitted on July 27th, 1999,842 part continuation application, this latter's application then requires to enjoy the U.S. Provisional Patent Application U.S.Ser.No.60/128 that submitted on April 12nd, 1999,874 rights and interests.The application also requires to enjoy the U.S. Provisional Patent Application U.S.Ser.No.60/167 that submitted on November 26th, 1999,572 rights and interests.Above-mentioned whole application gives comprehensive reference by quoting in this application at this.
The present invention relates to communication system on the whole.Specifically, the present invention relates to accelerate connect hours between communication system.
Now V.90 advise making the 56kbps modem standardization according to ITU.But a lot of 56kbps modulator-demodulators, particularly terminal use's modulator-demodulator, only can with such as K56flex, V.34, V.FC and V.32 wait existing pattern compatibility.These existing modulator-demodulators and V.90 modulator-demodulator that can be backward compatible can have between pattern and the full rate data pattern undesirable long the connection or initialization time dialing and connecting.Be start-up time 30 seconds, this particularly occurs operating in " always connecting " mode to other data communication protocols to the terminal use, and is quite annoying and not attractive.
Support the V.90 modulator-demodulator of existing modem communication agreement, usually the function shown in the execution list 1 during initialization.With disclose relevant time of operation in the table 1 can be with such as all factors such as rate server and channel conditions, different between difference connects.
Agreement Operation Time (second)
-- Dialing 1
-- Set up and call out 1
V.8bis Capabilities exchange 3.5
V.8 Capabilities exchange 3.5
V.90 Phase 2 Search and range finding 1.5
V.90 Phase 3 Digital impairment learning; Initial APCM training 8.5
V.90 Phase 4 Final PACM training; The setting power level; Constellation sends 2.5
V.42/V.42bis Error correction; Data compression 0.5
-- Login 0.5-5
Total=22.5-27.0
The existing V.90 modulator-demodulator of table 1-starts
V.8bis operation comprises quite long time out, and this time out comprises the major part with the relevant period of operation.This operation is described in more detail in ITU-T suggestion V.8bis (International Telecommunications Union, in August, 1996), by reference at this with reference to its content.As ITU-T suggestion V.8 (International Telecommunications Union, in February, 1998) described, V.8bis agreement is the V.8 extension of agreement, by reference at this with reference to its content.V.8bis and/or V.8 according to, two modem apparatus can exchange their other abilities, so that can utilize compatible protocol during follow-up initialization and data communication process.
Utilize and different determine simulation and digital channel characteristic V.90 the startup stage, the equalizer of training modulator-demodulator, and attempt optimizing current communication activity in addition.V.90 the details the startup stage and other aspects of modulator-demodulator V.90 are found in the ITU-T suggestion V.90 (International Telecommunications Union, in September, 1998), by reference at this with reference to its content.No matter how are the zone of client computer modulator-demodulator or state, all need the V.90 startup section part shown in the table 1, but during relevant with identical (or almost consistent) channel characteristics reconnecting, just can exempt or shorten much and operate.
In traditional V.90 modem system, in V.42/V.42bis the stage is carried out error correction and data compression technique.V.42 detail is contained in ITU-T suggestion V.42 in (International Telecommunications Union, in October, 1996), by reference at this with reference to its content.V.42bis detail is contained in ITU-T suggestion V.42bis in (International Telecommunications Union, January nineteen ninety), by reference at this with reference to its content.V.42 operation wishes that modem system can carry out login process with the pattern of in fact " zero defect ".Login process can be carried out by CHAP and PAP agreement; Point-to-point protocol (" PPP ") such as between such as client computers and ISP's server, connect and connect in the situation, can utilize the two because of security purpose.From the viewpoint of modem apparatus V.90, log-on message is taken as data and sends.In case the execution login process is just finished dial-up connection, and between server and the host computer software relevant, send data with client computer.
The Internet is widely used as daily research, amusement and means of communication, has increased the use to the 56kbps modulator-demodulator.But a lot of channels only can be supported such as V.34 waiting existing pattern.Therefore, though the newer modulator-demodulator (particularly those modulator-demodulators of selling with the new individual computer) of major part with V.90 suggestion is compatible, much existing pattern is still being used.The relevant long initialization time that returns back to existing pattern with modulator-demodulator V.90 is annoying, unfavorable in a lot of the application, and wants to connect immediately unexpected broken string after for the user and constitute seriously obstruction.In addition, even if two situations that V.90 connect between the modem apparatus long also can make its patience of terminal use that is impatient stand severe tests V.90 the startup stage.Therefore, wish to reduce very much usually and traditional V.90 modem system relevant initialization time.
Given modem communication activity may be interrupted or breaks because of a lot of reasons.For instance, call waiting signal may interrupt modulator-demodulator and connect, so that modem call must connect or reinitialize again.Another embodiment can place present modulator-demodulator connection wait can answer incoming call to respond call waiting signal or to make the user can connect exhalation to make the user, connects and can not interrupt modulator-demodulator.Ideal situation is can rebuild modulator-demodulator with direct mode and connect.But in the system of reality, must carry out retraining or the process that reinitializes guaranteeing two end device accurate synchronization, and guarantee that channel is enough balanced.As mentioned above, this retraining and reinitialize during, traditional V.90 modem system must expend more than 20 seconds.Therefore, also wish to reduce between the identical modem apparatus again the connect hours with temporary transient broken string in the response data communication or temporary transient the interruption.
Between such as parameter commutation periods such as data signaling rate, pre-coded coefficient, frequency spectrum integer, constellation information, the modulator-demodulator training can take place and consult this main part consuming time.With reference to figure 5, for instance, V.90 it show that analog pulse sign indicating number modulation (APCM) modulator-demodulator 580 can send to constellation parameter (CP) frame 510 digit pulse sign indicating number modulation (DPSM) modulator-demodulator 590 between period of negotiation, and this digit pulse sign indicating number modulation (DPSM) modulator-demodulator 590 then sends to APCM modulator-demodulator 580 with modulation parameter (MP) frame 520 in exchange.As described below, MP frame 520 and CP frame 510 are in synchronous versions, and comprise a lot of information bits and error detection CRC information (with reference to Figure 17 and Figure 18).
As shown in Figure 5, APCM modulator-demodulator 580 sends to DPCM modulator-demodulator 590 with CP frame 510 continuously, until APCM modulator-demodulator 580 receive from DPCM modulator-demodulator 590 one of them is sent CP frame 510 receive affirmation till.Equally, DPCM modulator-demodulator 590 sends to APCM modulator-demodulator 580 with MP frame 520 continuously, until DPCM modulator-demodulator 590 receive from APCM modulator-demodulator 580 one of them is sent MP frame 520 receive affirmation till.
The confirmation of receipt meeting that is used for CP frame 510 sends with the form of MP frame 520, comprises other and each information and have to be set at " 1 " the affirmation position 33 of MP frame 520.Have and be set at " 1 " the MP frame 520 of affirmation position 33 can be with 522 expressions of MP ' frame.In case DPCM modulator-demodulator 590 is received CP frame 510, then DPCM modulator-demodulator 590 can begin to send MP ' frame 522 but not MP frame 520.The repeating transmission and can continue till DPCM modulator-demodulator 590 is received the confirmation of receipt of MP or MP ' frame 520 or 522 of this MP ' frame 522.
Be similar to DPCM modulator-demodulator 590, send from the confirmation of receipt meeting of APCM modulator-demodulator 580 form with CP frame 510, comprise other and each information and have be set at " 1 " and the affirmation position 33 of CP frame 510.Have and be set at " 1 " the CP frame 510 of affirmation position 33 can be with 512 expressions of CP ' frame.In case APCM modulator-demodulator 580 is received MP frame 520, then APCM modulator-demodulator 580 can begin to send CP ' frame 512 but not CP frame 510.The repeating transmission and can continue always till APCM modulator-demodulator 580 is received the confirmation of receipt of CP or CP ' frame 510 or 512 of this CP frame 512.
These comprise information bit long CP, CP ', MP and MP ' frame repeat that to send in fact be sizable consumption.But along with exchanging more parameter and information bit between the modulator-demodulator, this problem becomes more remarkable in such as standards of future generation such as ITUV.92 suggestions.Figure 19 illustrates the embodiment of the constellation parameter frame of the APCM modulator-demodulator 580 that is called CPa frame 1900.As shown in the figure, the CPa frame comprises than CP and MP frame 1800 and 1900 more information positions (referring to Figure 17, Figure 18 and Figure 19), for instance, has constellation information and the precoder and the prefilter coefficient of high-res.CPa frame 1900 also comprises such as variable-length parameters such as parameters 1920, and it may increase the more information position and give CPa frame 1900.
Because import in the ITU suggestion V.34 in affirmation mechanism and the ITU suggestion V.90 and re-use affirmation mechanism, so, because of these long sequences the ITU suggestion is excessively increased start-up time V.92.For instance, need between DPCM modulator-demodulator 590 and APCM modulator-demodulator 580, exchange significant amount of information in upstream V.92PCM between the starting period.Especially DPCM modulator-demodulator 590 needs to send very long sequence, comprises the constellation information, precoder and the prefilter system that have high-res in the CPa frame and receives.
Therefore, strongly need in the art to eliminate the very long sequence that comprises a lot of parameters and information bit repeat send this huge consumption, use and reduce training and negotiation time and obtain quick connection.
The invention provides a kind of startup relevant and reach the shortening technology of connect hours again with the data communication system that adopts modulator-demodulator.Fast again interconnection technique make the known channel characteristics of previous connection average out with reduce follow-up trial connect again two identical modem apparatus relevant reinitialize time decreased.According to an explanation embodiment, utilize technology of the present invention to reduce by the time of line again such as the communication activity of higher level protocol such as PPP.Though not being limited to any particular modem uses, but quick startup reaches connection procedure again can be in order to part or the V.90 modulator-demodulator processing of employing usually of eliminating initializtion protocol, for instance, V.8bis, V.8, digital impairment learning, initial training, search and range finding or the like.In addition, reach again connection technology compared to the quick startup of traditional modulator-demodulator start-up technique and can carry out some operation at different time or with different order.
To reduce the relevant time method of line again of data transmission system, carry out above-mentioned and other viewpoint of the present invention by a form, data transmission system has first device, and first device is configured to communicate by letter with second device on communication channel.Illustrated method relates between first device and second device to be set up communication activity, obtains some and be used for the data transmission system operating parameter relevant with communication channel and store at least one operating parameter at the second device place on communication channel.After suspending in the communication activity, this operating parameter is called at the second device place again.
According to an aspect of the present invention, during startup between the communication system, maintenance, negotiation again, quick line or other Signal Exchange Processing, communication system can exchange some parameters, for instance, and modulation, constellation, precoder, prefilter and other communication relevant information.Communication system can exchange the long letter breath sequence that comprises the desired parameters or the communication information.Then, communication system begins to send short sequence, comprises the confirmation part, but non-all be embedded in other parameter or information in the long sequence.Have this short sequence of affirmation information that long letter breath sequence is received in representative in case each communication system is received, communication system just is transferred to the next stage of Signal Exchange Processing.In fact the use of short message sequence has been shortened Signal Exchange Processing and has been eliminated the continuous transmission of long letter breath sequence and resend delay and the consumption of being introduced.
Among the present invention on the other hand, if one of them communication system is not at the fixed time or receive within the incident that affirmation sequence, this communication system just can resend another long letter breath sequence.Then, resending communication system can continue to send long letter breath sequence or can begin to send short sequence once again.
With further reference to following described accompanying drawing and explanation, the present invention is above-mentioned to be will be more readily apparent from other aspects.
Brief Description Of Drawings
In conjunction with the accompanying drawings, with reference to describing in detail and claim, can obtain more complete understanding to the present invention, wherein similar label refers to like in the accompanying drawing:
Fig. 1 is the block diagram that explanation can be supported the general modem system environments that point-to-point protocol (PPP) connects;
Fig. 2 is the flow chart that general quick startup is handled according to the present invention;
Fig. 3 is the block diagram of explanation modem system according to the present invention;
Fig. 4 is the flow chart of the quick startup processing section of explanation two modem apparatus execution;
Fig. 5 is the sequential chart of handling corresponding to the quick startup that two modem apparatus are carried out;
Fig. 6 is the quick sequential chart of carrying out corresponding to two modem apparatus of link process again;
Fig. 7 is the quick flow chart of link process again that explanation two modem apparatus are carried out;
Fig. 8-Figure 15 is corresponding to different modulator-demodulator standbies, line and talk about the sequential chart of whole situation again;
Figure 16 is the block diagram that combines the modem system of different aspect of the present invention;
Figure 17 illustrates definition every in exemplary modulation parameter (MP) frame;
Figure 18 illustrates definition every in exemplary constellation parameter (CP) frame;
Figure 19 explanation is used for everybody definition of exemplary constellation parameter of analog modem (CPa) frame;
Figure 20 illustrates definition every in exemplary minor system parameter (MPs) frame;
Figure 21 illustrates definition every in exemplary short constellation parameter (CPs) frame;
Figure 22 explanation is used for everybody definition of exemplary short constellation parameter of analog modem (CPas) frame;
Figure 23 illustrates the exchange of conventional modulated parameter (MP) frame that V.34 an example advises according to ITU;
Figure 24 a illustrates the example quick exchange of modulation parameter (MP) frame according to an embodiment of the invention;
Figure 24 b illustrates the example quick exchange of modulation parameter (MP) frame and constellation parameter (CP) frame according to an embodiment of the invention;
Figure 24 c illustrates an example constellation parameter (CP) frame and the quick exchange that is used for the constellation parameter frame (CPa) of analog modem according to an embodiment of the invention;
Figure 25 a illustrates the quick exchange of an example according to one embodiment of the invention modulation parameter (MP) frame in erroneous frame transmission situation;
Figure 25 b illustrates that an example sends the quick exchange of modulation parameter (MP) frame and constellation parameter (CP) frame in the situation according to one embodiment of the invention in erroneous frame;
Figure 25 c illustrates that an example sends constellation parameter (CP) frame and the quick exchange that is used for the constellation parameter frame (CPa) of analog modem in the situation according to one embodiment of the invention in erroneous frame;
Figure 26 illustrates that an example handles according to the rate renegotiation that one embodiment of the invention betides between APCM and the DPCM;
Figure 27 illustrates that an example betides quick training managing between APCM and the DPCM according to one embodiment of the invention; And
Figure 28 illustrates that an example betides quick connection training managing between APCM and the DPCM according to one embodiment of the invention.
100 modem systems, 102 server modems, 104 client computer modems, 105 host software, 106 numerals connect 108 digital telephone networks, 110 local central offices, 112 simulation local loops, 300 modem systems, 302 modems, 304 modems, 306 public telephone networks, 308 communication channels, 310 communication channels, 312 processors, 314 processors, 316 transmitters, 317 equaliser structures, 318 receivers, 319 echo canceller structures, 320 memories, 350 receivers, 352 equaliser structures, 354 echo canceller structures, 356 transmitters, 366 memories, 1600 modem systems, 1602 modem apparatus, 1604 modem apparatus, 1608 calling devices, 1610 parallel answering device 1611 serial answering devices 1612 transmitter districts 1614 acceptance divisions, 1634 signal detection components, 1656 calling part ID elements, 1660 signal detection components, 1672 exchanging networks
This sentences functional block element and different disposal step, and the present invention is described.Should be appreciated that,, can realize these functional blocks by the hardware element that is used to carry out specific function of any number.For instance, the present invention can adopt different integrated circuit components, for instance, memory component, Digital Signal Processing element, logic element, question blank or the like, they can carry out difference in functionality under one or more microprocessors or the control of other control device.In addition, to those skilled in the art, can implement by the data communication content of any number understanding the present invention, and modem system described herein only is invention one illustrative application.It should be noted that in addition the present invention can adopt the conventional arts such as data transmission, signaling process, signal processing and adjusting of any number.These general technologies well known to those skilled in the art no longer describe in detail herein.
Should be understood that described herein and shown in specific embodiment only for illustrating, do not really want to limit scope of the present invention.In fact, for brevity, do not describe traditional Code And Decode herein in detail, regularly recover, automatic gain control (AGC), synchronously, training, and other function aspects (and element of system's individual operation element) of data communication system.In addition, comprise the connecting line shown in the accompanying drawing here in order to represent functional relationship and/or the entity coupling between the illustrational different elements.It should be noted that a lot of functional relationships possible or that increase or entity connect and can occur in actual communication systems.
Fig. 1 is the block diagram that the general modem system 100 that wherein implements the technology of the present invention is described.For this point is described, if modem system 10 can be supported the connection relevant with higher level protocol, for instance, PPP(Point-to-Point Protocol) connects.PPP connects the typical case and goes up with relevant such as the internet communication between indivedual terminal uses and the ISP.About this point, modem system 100 comprise a plurality of server modems (with label 102a, 102b, and 102n represent) with client computer modulator-demodulator 104.Server modem 102 can be relevant with ISP or any suitable data source respectively.Client computer modulator-demodulator 104 can be relevant with the proper data source that can carry out host software 105 such as personal computer etc.For this point is described, host software 105 can be for such as operating systems such as Microsoft's Windows, or anyly can cooperate modem system 100 application program operating.Though be not shown among Fig. 1, client computer modulator-demodulator 104 can integrate with personal computer.
In the situation of this explanation, modem system 100 can adopt and V.90 suggestion, existing 56kbps agreement, the 56kbps modulator-demodulator of compatibility such as suggestion V.34.Under the modem system situation the present invention is described though V.90 this be in,, V.34 this technology can be applied in modem system or any existing modem system equally.V.90 or the 56kbps modem apparatus be applicable to modem system 100, wherein given server modem 102 utilizes the numeral that is connected to digital telephone network 108 to connect 106.Client computer modulator-demodulator 104 can be connected to local central office 110 via simulation local loop 112.Therefore the communication channel that builds between client computer modulator-demodulator 104 and any server modem 102 can be by the sensible central office 110 of digital form.Then, digital signal can be transformed into analog signal so that transmission on local loop 112.
If the terminal use sets up Internet connection, host software 105 just can be carried out the operation of any number with the response user command.For instance, host software 105 can point out client computer modulator-demodulator 104 to dial and connect the relevant telephone number with server modem 102a (for instance, server modem) relevant with user ISP.Server modem 102a and client computer modulator-demodulator 104 can be carried out equalizer, the initialized handshaking routine of Echo Canceller, transmission power level, data rate, and other possible operating parameter relevant with current communication channel.In addition, host software 105 can make 104 transmissions of client computer modulator-demodulator and receive and can make the user login the authentication data of the Internet via the service provider.As mentioned above, according to known CHAP or PAP technology, can between server modem 102a and client computer modulator-demodulator 104, exchange authentication data.In the alternate embodiment that adopts non-PPP higher level protocol, can carry out suitable login process to replace CHAP or PAP process.
As mentioned above, relevant with the traditional modem system dialing connection time (reaching the line time again) is longer and undesirable.Utilization of the present invention is to building on the repeated use such as the communication channel between the modem apparatus such as server modem 102a and client computer modulator-demodulator 104.If client computer modulator-demodulator 104 is relevant with the Table top type personal computer that is positioned at the specific region, just need on identical analog communication channel, set up and being connected of any given server modem 102.In other words, client computer modulator-demodulator 104 will always be set up analog channel between use side and central office 110.No matter the slight variation that analog channel Yin Wendu and other environmental effect cause how, the initialization of client computer modulator-demodulator 104 (relevant with analog channel) will remain unchanged between difference connects basically.
Fig. 2 can handle 200 flow chart by the general quick startup of carrying out such as data communication systems such as modem systems 100.In a real system, handle 200 and can carry out by any function element of server modem 102, client computer modulator-demodulator 104, host software 105 and/or modem system 100 is collaborative.In addition, in the situation of the whole initialization procedure of the traditional modem agreement of following any number, can realize handling 200.
Start fast and handle 200 meetings from task 202, task 202 relates to call setup between client computer modulator-demodulator 104 and the server modem 102.In the situation of present embodiment, client computer modulator-demodulator 104 is regarded as the caller device.Therefore, host software 105 and/or client computer modulator-demodulator 104 can dial and connect with such as the relevant telephone number of server 102b.Suppose that server modem 102b can cause the connection of increase, then it can also produce the appropriate responsive sound by line in a conventional manner.When the equal line of two modem apparatus and when communicating with one another, can connect 106 via numeral, telephone network 108, central office 110 and local loop 112, set up communication channel.The dialing that is utilized during the task 202, ring, and response process can follow traditional agreement.
After task 202, carry out query task 204 to determine whether to support quick connection protocol by modem system 100.Query task 204 for make different server modems and different client computer modulator-demodulator can mutual operation and compatible for, need.For instance, server modem 102b can be the V.90 modulator-demodulator of supporting quick connection characteristics of the present invention, and client computer modulator-demodulator 104 can be the existing 56kps modem apparatus of not supporting quick connection performance.Query task 204 can be carried out by server modem 102b or client computer modulator-demodulator 104.The technology of carrying out query task 204 will be described in detail in detail below.No matter when being client computer modulator-demodulator 104 originating calls or server modem 102 originating calls, all can execute the task 204 on an equal basis.
If query task 204 judges when two modem apparatus are not supported quick connection protocol, then task 206 can continue after.Task 206 can be carried out modem system 100 to begin traditional initialization routine.For instance, in the situation of modem system V.34 or V.90, task 206 can begin such as V.8bis waiting capabilities exchange agreement.Perhaps, some modem systems can only be implemented V.8 capabilities exchange agreement.Older existing modem system can be skipped and V.8 reach V.8bis process and can carry out suitable initialization routine together according to existing pattern.After task 206, modem system 100 can be according to applicable modulator-demodulator specification to carry out known start-up course.For instance, if V.90 modem system 100 supports that then other start-up operation associated be confirmed, be reached to task 208 can with traditional V.90 equalizer training, Echo Canceller training, constellation design, power level.If execute the task 206 and 208 o'clock, then relevant with communication activity start-up time is basically with traditional V.90 to be connected start-up time identical.
If query task 204 is judged when quick connection protocol is fully supported, then also can carry out query task 210.Whether the characteristic of the communication channel that query task 210 meeting tests are set up is similar to the corresponding characteristic of the communication channel of previous foundation.In brief, query task 210 wherein one or more attributes of sequence relatively received and the memory attribute of before receiving the sequence relevant with the previous channel of setting up.The signal of being received is passed on the information about the communication channel characteristic.Especially the signal received is passed on the information relevant with simulating local loop 112.
Among the embodiment described herein, wherein a modem apparatus can digitally be connected to digital telephone networking 108, and simulation local loop 112 can influence signal to be connected to the constant mode in a connection duty border from one.Though for repeating to be connected to same server modulator-demodulator 102, analog feature is similarly, but temperature, humidity change a little, the entity of other environment change, system hardware changes, and other operating parameter can cause the current channel characteristic random fluctuation that is used for the comparison purpose.Yet the comparison procedure of carrying out during inquiry work 210 preferably is designed to hold these fluctuations.For convenience of explanation, " similarly " characteristic means query task 210 will suppose that current channel conforms to the previous channel of being led because of variation as one of above-mentioned uncontrollable and unpredictable factor.
If query task 210 is judged when the parameter of current communication channel does not meet the parameter of previous communication channel, then can be executed the task 212.As task 206, task 212 can the traditional initialization routine of prompting modem system 100 beginnings.In preferred embodiment, if when modem system 100 confirms that quick connection protocol is supported fully (query task 204), be not all also to be most V.8bis process even then can skip.Therefore, facilitate the capabilities exchange agreement by work 212.Then, but execution work 214 enters traditional V.90 start-up course to impel modem system 100.If task 214 is similar to above-mentioned task 208 and executes the task 212 and 214, can reduce about three seconds then relevant with communication activity start-up time, and be to carry out V.8bis required typical case's time of process start-up time relevant with communication activity.Therefore, even query task 210 judges when current channel is not similar to previous channel that the whole initialization time that 200 meetings reduce modem system 100 is handled in startup fast.
If query task 210 is found current channel characteristics and " is met " characteristic of the previous channel of setting up of storage, then can execute the task 216.During task 216, carry out the training process that shortens.As detailed below, the known features that modem system 100 can the balance current channels so that modem apparatus can be trained immediately.For instance, though the specific timing phase of digital impairment (for instance, the bit signaling of being captured) may be unknown,, for repeating connection, the pattern of digital impairment will be consistent.Therefore, in the situation of modem system V.90, need not fully carry out tediously long digital impairment learning process.In addition, need not carry out equalizer and echo canceller initial training, and PCM encoding and decoding transmission level and data rate at the beginning of the beginning decision.
Can execute the task 218 so that modem system 100 can operate with original data rate.Should be appreciated that the training relevant with task 216 part can carry out with the original data rate relevant with task 218.By telling the initiation parameter relevant with previously stored channel again, modem system 100 can be operated apace with original data rate.During task 218, modem system 100 can carry out equalizer and echo canceller last training, exchange modulation parameter, and exchange be used for constellation signaling point during the full rate data pattern.According to the present invention, during task 218 cooperates one or more last training sequences, can send PPP information.For instance PPP information can with such as login such as CHAP or PAP authentication information exchange correlation.Send under the situation in the data during the consideration task 218, this part that starts processing 200 fast can be regarded as first data pattern or data phase one.
After task 218, start processing 200 fast and can impel modem system 100 with last data rate operation (work 220).Execute in the situation of example in this duty, this part of processing 200 can be regarded as second data pattern or data phase two.The initial transformation that reaches between the final data speed preferably takes place with seamless way; Modem system 100 adopts the appropriate signals sequential or simultaneous techniques is so that can cause this data rate conversion.During all data pattern, modem system 100 utilizes the signaling point constellation that exchanges during the task 218.In case modem system enters in the final data pattern, then start fast and handle 200 end.
Fig. 3 is the block diagram of the modem system 300 of explanation configuration according to the present invention.Modem system 300 preferably is configured to carry out quick startup processing 200 and other processing described herein.For instance, modem system 300 described herein is 56kbps or the situation of system (or in fact being similar to the V.90 system of system) V.90.But, do not really want to limit the present invention in any case should be appreciated that the special enforcement shown in Fig. 3.
Generally speaking, modem system 300 comprises such as first modulator-demodulator of modulator-demodulator 302 and such as the second modem of modulator-demodulator 304.In the situation of this explanation, modulator-demodulator 302 is regarded as server modem, and modulator-demodulator 304 is regarded as client computer modulator-demodulator (referring to Fig. 1).Should be appreciated that modulator- demodulator 302 and 304 can be configured to all can operate with transmission or receiving mode similarly.Modulator- demodulator 302 and 304 is usually according to knowing principle configuration so that communicate by letter on the telecommunications network such as public telephone network (PSTN) 306 via at least one communication channel ( channel 308 and 310 for instance).For the purpose of illustrating, to state describedly on Fig. 1 as cooperating, modulator-demodulator 302 can digitally be connected to PSTN306, and modulator-demodulator 304 can be connected to PSTN via central office's (not shown) and simulation local loop.For brevity, Fig. 3 does not show different encoders, decoder, reaches the function element that is present in actual modem system on other typical case.
Modulator-demodulator 302 can comprise processor elements 312, and modulator-demodulator 304 can comprise processor elements 314.Except specific operation described herein, processor 312 and 314 can suitably be configured to carry out the different operating relevant with the operation of modem system 300.In fact, when needs supported that it is functional, modem system 300 can be incorporated processor, control element, and the memory component of any number into.These processors, control, and memory component can be suitably interact with other function element of modulator- demodulator 302 and 304, use the operation of access and manipulation data or supervision and adjusting data system 300.
Processor 312 can be confirmed upward associated of routine operation with the connection fast shown in functional block 322.During query task 204, can adopt quick connection to confirm routine 322 (referring to Fig. 2).Processor 312 also can train routine 324 operations to go up associated with some.Training routine 324 can be used for beginning and/or last training at the beginning of the modem system 300.As mentioned above, during work 216, adopt training routine 324.Processor 312 also can cooperate to dial and connect differentiates design 326 operations, for instance, dials and connects and differentiates design 326 information exchanges that can be according to PAP or CHAP.Can be on the CHAP/PAP function with one or more softwares (or increasing ground) realization alternately of being kept corresponding to the server of modulator-demodulator 302.The operation of these explanations does not really want to limit the ability of treatment element 312, and treatment element 312 is the increase operation that preferably is configured to support any number.
Modulator-demodulator 302 comprises transmitter 316, and transmitter 316 is the symbol of encoding with the transmission process in order to according to traditional data transmission technology.These symbols can be represented data that modem system 300 utilized, training sequence, synchronizing signal, control signal, information exchange sequence, and any suitable signal of communication.Modulator-demodulator 302 also comprises receiver 318, and receiver 318 is to know modem technology configuration according to any number.Receiver 318 can be configured to from modulator-demodulator 304 receiving communication signals; These signals may comprise information encoded position, control signal, information exchange sequence, training sequence or the like.Receiver 318 comprise or function on be relevant to equaliser structure 317 and echo canceller structure 319.The configuration of equaliser structure 317 and echo canceller structure 319 and operation can be with consistent such as the conventional art of any numbers such as adaptive filtering deduction.
Modulator-demodulator 302 preferably is configured to produce, handles, reaches transmission different pieces of information and the signal relevant with the operation of modem system 300.For the purpose of illustrating, Fig. 3 shows some frames relevant with the different operating characteristic of modem system 300; These operating characteristics have relevant particular data sequence, control signal or the like.Though any amount of increase or other data can be handled and send to real system, special embodiment described herein can operate with the data collaborative of following at least pattern; Transform sequence 328, recall signal point sequence 330, authentication information 332, connect identifier 334, training information 336, and user data 338 fast.Will be described in detail in the following these data, and the data processing of modem system 300.
Modulator-demodulator 302 also comprises the memory 330 of the right quantity of supporting that its operation is required.Memory component 320 can be random access memory, read-only memory or its combination.Cooperate one or more processing memory components 320 related to the present invention to can be configured to store modem system 300 employed information.For instance, memory component 320 can be configured to store suitable recall signal point sequence 338.The pattern of the sequence that memory 320 can store specific signal point, transmission level, be used to send in order to format, or the like.In preferred embodiment, recall signal point sequence 338 can corresponding sequence 330 (above-mentioned).Memory component 320 also can be configured to store some parameters relevant with the training of receiver 318.With these receiver parameters of frame 340 demonstrations and the initialization associated of equaliser structure 317 and/or echo canceller structure 319.In fact, the information that memory component 320 storages are relevant with simulation and/or numerical characteristic, for instance, these information can be the filter tap coefficient of equaliser structure 317 and echo canceller structure 319 and send the encoding and decoding level and estimate.
According to preferred embodiment of the present invention, memory component 320 also can be stored some parameters of channel (showing with previous channel frame 342), attribute and/or the characteristic of previous foundation.Previous channel parameter 342 can be during communication activity any appropriate time storage or in period period ground renewal.In fact, modulator-demodulator 302 and modulator-demodulator 304 all can be configured to save current channel parameter to consider the temporary transient interruption relevant with current communication activity, delay or broken string (no matter this interruption, delay or break be intentionally or unintentionally) in advance.As following described, in order to respond temporary transient interruption or the time-out in the modem data sending mode, modulator-demodulator 302 can be in " wait " till the initialization once again of communication activity quilt.At this moment, modulator- demodulator 302 and 304 can access storage channel parameter but not carry out tediously long retraining process.
Modulator-demodulator 304 comprises receiver 350, and it is operated with equaliser structure 352 and echo canceller structure 354 is relevant.Receiver 350 is configured to from modulator-demodulator 302 receiving communication signals.Modulator-demodulator 304 also comprises transmitter, in order to send signal of communication to modulator-demodulator 302.These elements of modulator-demodulator 304 can be similar to the counter element of modulator-demodulator 302.Therefore, for brevity, in the explanation of this modulator-demodulator 304, modulator-demodulator 302 and the 304 common characteristics and the explanation of function will can not be repeated.
Can confirm routine 358, one or more training routine 360 and dial and connect discriminating design 362 associated with quick the connection in processor 314 operations.These processing capacities are similar to cooperate on the processor 312 states corresponding function.Except these characteristics, processor 314 still can the operation on digital impairment learning routine 364 associated.Digital impairment learning routine 364 can be performed with traditional V.90 modulator-demodulator digital impairment learning process compatibility.Routine 364 can be used for impelling modulator-demodulator 304 can analyze the digital impairment learning sequence that modulator-demodulator 302 sends and can determine digital impairment pattern and the relevant any timing phase of digital impairment therewith in the present communication channel.Routine 364 can interact with memory component 366, so that modulator-demodulator 304 can be stored the digital impairment profile relevant with given communication channel.Routine 364 can make modulator-demodulator 304 can choose the appropriate signals point, and bit signaling is captured in order to the quilt of indicating or significantly show in channel by appropriate signals point system.For instance, if that modulator-demodulator 304 judges that position (being the least significant bit of symbol on the typical case) that networkings force to be captured becomes is zero, then, choose that to have least significant bit be 1 signaling point, so that can detect the bit signaling stage of being captured easily.
Processor 314 also can be configured to carry out channel comparative example line program 368, and comparative example line program 368 can be carried out during the work 210 of above-mentioned cooperation Fig. 2 explanation.Channel comparative example line program 368 determines preferably whether the characteristic of current communication channel is similar to the previous relevant characteristic of setting up of communication channel of storage.In the situation of this explanation, current channel is the connection that repeats of the previous channel of setting up, and the characteristic of some storages can reside in the memory component 366.Routine 368 will be described in detail in detail below.
About processor 312, the operation of this place announcement does not really want to limit the application of treatment element 314, and treatment element 314 is the increase operation that preferably is configured to support any number.
As modulator-demodulator 302, modulator-demodulator 304 can be configured to produce, handle, reach transmission different pieces of information and the signal relevant with the operation of modem system 300.Can suitably store, format, reach these data of generation, signal, reach sequence by the element that the microprocessor of any number is controlled.Though actual system can handle and send any amount of increase or other data, transmitter sector 356 is to show the data that cooperate following pattern: connect identifier 370, transform sequence signaling point identifier 372, training information 374, authentication information 376 fast, reach user data 378.These data, and the data processing of modem system 300 will be described in detail in detail below.
As mentioned above, modulator-demodulator 304 comprises and supports it to operate the memory 366 of required right quantity.Memory component 366 is similar to memory component 320.In preferred embodiment, memory component 366 is configured to store recall signal point sequence 380, and recall signal point sequence 380 is relevant with the employed corresponding recall signal point sequence of modulator-demodulator 302 338.In the present embodiment, in two modulator- demodulators 302 and 304, can be predetermined and know identical recall signal point sequence.Memory component 366 also can be stored some parameters, attribute and/or the characteristic of the channel (with 382 expressions of previous channel frame) of previous foundation.Can during communication activity, store or upgrade previous channel parameter 382 by any appropriate time at the period period.Be similar to memory component 320, memory component 366 also can be configured to store some parameters 384 relevant with the training of receiver 350.The receiver parameter 384 of these storages can preferably access be slow to reduce the startup that suffers from traditional V.90 modem system typical case effectively by modulator-demodulator 304.
Characteristics more of the present invention help to reduce V.90 modulator-demodulator startup and/or line number of times again, for instance, exempt or shorten program V.8bis, release or shorten initial training program, and the exchange (but not always waiting for till obtaining full data rate) early of the authentication data in initialization process, logined.In one embodiment, when modem system is in the initial training pattern relevant with intermediate data rate, can exchange the login authentication data.Arbitrary characteristics can be implemented in modulator-demodulator 300 in these (reaching other) characteristics of the present invention.
Fig. 4 illustrates the quick startup of being carried out by two modem apparatus to handle 400 this part flow charts, and Fig. 5 is the sequential chart of handling corresponding to the performed quick startup of two modem apparatus 500.Sequential chart 500 comprises and is generally used for V.8, V.8bis, V.34, V.90 reaches prefix and abbreviation in other data communication protocol situation.Using this term herein is that the present invention's design in the practical embodiments situation will be described.But the present invention can be used in any suitable situation, and specific signal between two modem apparatus shown in Fig. 5, sequence number, sequence sequential, data rate, and reciprocation do not really want to limit invention scope.
Be relevant to such as the client computer modulator-demodulator of APCM and such as the working method of the server modem of DPCM with sign, illustrate to start processing 400 fast.Equally, sequential chart 500 shows the general burst that APCM and DPCM send.In 5, the arrow between the two main sequences is represented reciprocation or the response between APCM and the DPCM.
Start processing 400 fast and start from task 402, it causes APCM to dial and connect the telephone number relevant with DPCM.As mentioned above, will in local loop 112, central office 110, and digital telephone networking 108 on set up and call out (with reference to figure 1).Be response initial ringing sound, DPCM can be placed in connection state (task 404), that is DPCM can answer calls.Certainly, APCM and DPCM can be configured to produce, answer, reach to handle and call out according to traditional telephone protocol.After the task 404, can execute the task 406 with initialization V.8 or capabilities exchange agreement V.8bis such as.Capability requests signal among the described herein embodiment (being represented by CRe in Fig. 5) can be sent out during task 406.The CRe signal can be in order to notice APCM, and DPCM can support quick linker.The CRe signal can be the V.8bis revision of signalling tone of tradition, and for instance, V.8bis sound can be amplitude modulation.Perhaps, the frequency relevant with signalling tone can be trembleed in a periodic manner or the low level broadband signal can be added to signalling tone.In this way, existing modem system can be used as the CRe signal generally V.8bisCRe signal.
Be the foundation response calling relevant with current communication channel, APCM can execute the task 408 suitably to send the quick identifier (QC) that connects to DPCM.Among the embodiment of described reality, the transmission that can facilitate quick connection identifier is with the detection of response APCM to the CRe signal herein.The QC signal preferably is designed to existing modulator-demodulator and does not support the modulator-demodulator of quick connection protocol can not be subjected to QC signal adverse effect, that is the QC signal should be ignored by incompatible device.(if APCM does not support quick interconnection technique described herein, then as the above-mentioned explanation with reference to figure 2, will can not produce the QC signal, and starts and will carry out in a conventional manner).In preferred embodiment, the QC signal also can be loaded with the signaling point identifier, signaling point identifier system distinguishes in the transform sequence (in Fig. 5 with QTS and QTS represent) that by the employed signaling point of DPCM, wherein signaling point system is in order to significantly to indicate, to show or the clear digital impairment that shows in communication channel.Therefore, the QC burst can be carried out dual-use function.
If DPCM also supports quick connecting method, then its 410 receptions of preferably executing the task with response QC signal.Cooperation task 410, DPCM can send quick connection and confirm (being represented by the QCA signal) in Fig. 5.As top described with reference to figure 2, if DPCM QC signal unconfirmed, if perhaps APCM does not know how not receive the QCA signal, modem system will carry out traditional start-up course.About modem system 300 described (with reference to figure 3), can carry out form, planning and the processing of QC and QCA as top by the particular of indivedual modulator-demodulators.
When if DPCM and APCM all support quick interconnection technique, then visual specific application and exempt, revise or shorten the initialization routine of any number.For instance, the transmission of QC signal indicates APCM inherently and meets V.90 in V.90 compatible modem system situation.Similarly, the transmission of QCA signal can indicate DPCM inherently and also meets V.90.As a result, modem system can be exempted such as V.8 and/or V.8bis waiting general ability exchange agreement partly or entirely.This characteristic itself can reduce and start slow 5 seconds (for typical connection).
Should be appreciated that, when DPCM initially calls out APCM, with task 402 to the relevant above-mentioned quick connection identification of task 410 and confirm that design can use equivalently.When in order to respond initial call or request, when DPCM calling APCM sets up communication channel, may produce this situation from APCM.In this case, APCM will send the CRe signal, and DPCM will send the QC signal, and APCM will send the QCA signal.Different with top APCM initial call explanation, APCM can send to DPCM (being not that signaling point is embedded in CRe or the QCA sequence) with increase signal or the sequence of suitably discerning the transform sequence signaling point.
After the task 410, DPCM can execute the task 412 to obtain the signaling point that is used for conversion (or synchronously) sequence.As mentioned above, the QC signal preferably is loaded with the information of identification signal point, and these signaling point systems can make APCM detect the robbed digit signaling existence easily.About digital impairment learning process 364 described (with reference to figure 3), can carry out the decision of signal specific point as top by APCM.This decision can according on the same channel with the analysis in the past of the digital impairment of previous join dependency.After APCM received the QC signal, task 412 can be carried out by processor 312.
Be response task 412, can execute the task 414 so that suitable transform sequence can send by DPCM.In illustrational embodiment, transform sequence comprises the positive negative value of the signaling point of obtaining in the task 412.Therefore DPCM can utilize selected signaling point of APCM and suitable sign (can be predetermined) to produce transform sequence.Transform sequence configuration also is formatted as APCM and can makes itself synchronous with the follow-up signal or the sequence of DPCM transmission when sending sequence detecting.In this way, the APCM receiver can be obtained its sequential from transform sequence.Transform sequence can have any predetermined length and have any predetermined sign pattern.For instance, in the embodiment shown in Fig. 5, transform sequence can by quick time series (QTS) and QTS the signal representative, wherein QTS represents the signal specific point sequence, and QTS be identical sequence with opposite sign.The QTS sequence can repeat 810 code elements in Fig. 5, QTS sequence then repeat 30 code elements.
One practical embodiments according to the present invention, formatted so that time of QTS root sequence of QTS sequence and do not have common denominator (except) with time of the robbed digit signaling (RBS) of networking join dependency.For instance, a suitable QTS root sequence be O ,+A ,-A ,+A ,-A (the wherein signaling point of the outstanding expression of A representative RBS existence).Therefore, for embodiment shown in Fig. 5, this QTS root sequence with 5 these one-periods repeats 162 times, and QTS sequence then comprises the root QTS sequence of 6 repetitions with opposite sign.
For the foregoing description, wherein the RBS cycle can be assumed to be 5, and the transform sequence of being received can be accepted 30 discrete Fourier transform (DFT) (DFT) to obtain the timing phase of DPCM.In addition, some the discrete frequency place relevant with DFT result reveals the existence of RBS.In this way, can from the transform sequence of receiving, choose sequential and RBS information.In addition, can obtain timing phase information independently from RBS information.
DPCM preferably is configured to send the specific signal point sequence during task 416.As the person that is familiar with the modem protocol understands, the answer tone that signal point sequence can be regarded as revising.Among Fig. 5, this signal point sequence can be by ANSpcm signal representative.As shown in Figure 3, predetermined ANSpcm sequence 338 can be stored in the memory component 320, is sent by sending part 316.Among the embodiment of one reality, DPCM can send the ANSpcm signal after transform sequence.This is that in a single day APCM detects transform sequence and can expect that promptly signal point sequence is needed.In other words, APCM to the detection of transform sequence show signal point sequence will follow after.
In the preferred embodiment, the ANSpcm signal comprise pulse code modulated signal point sequence or with the sequence of the signaling point of pulse code modulated signal spot correlation.For instance, the ANSpcm signal can be formatted into μ rule or A rule codeword sequence or general code word (U sign indicating number) sequence.APCM and DPCM preferably are configured to the ANSpcm signal and can were predetermined or predicted before the initialization that starts processing 400 fast.Among another embodiment, the number of different ANSpcm signals can suitably be stored in the question blank, and perhaps, the ANSpcm signal can and be sent to another modem apparatus in a suitable manner by the design of one of modem apparatus before task 416.For instance, the ANSpcm signal can be designed to be detected easily by APCM by analyzing the ANSpCffi signal of being received the existence of RBS.In this embodiment, for transform sequence (QTS and QTS), may not need identification or outstanding expression RBS.
In situation V.8, be to produce answer tone with amplitude modulation 2100Hz sound.On the contrary, the present invention utilizes the ANSpcm signal to produce tone (being the tone of 2100Hz for instance) by the digital form that adopts pulse code modulated signal point.In other words, the ANSpcm signal is Analog signals'digital performance.The ANSpcm signal preferably constitutes the ANSpcm signal with the pulse code modulated point of knowing, so that can be used for other purposes except simple answer tone.In preferred embodiment, the ANSpcm signal comprises a lot of variable pulse sign indicating number modulation point relevant with the certain electric phone network.This one side of ANSpcm signal is comparatively desirable, makes the ANSpcm signal can be used for determining or discerning the characteristic of current communication channel, and particularly numeral is filled out lining.Use a large amount of possible code words to guarantee that the ANSpcm signal fills out lining with the detection meeting with the numeral that the two-way incoming level is merged into one road output level.The ANSpcm signal also is configured to provide and is applicable to the tone of forbidding the action of network echo arrester and network echo inhibitor.
If use question blank to define the ANSpcm signal, in the occasion of wanting or require a plurality of transmission levels, actual enforcement is inconvenient.For instance, V.90 the ITU-T suggestion allows DPCM to specify 32 different transmission levels.Storage is respectively applied for the submeter of each transmission level, can therefore cause too much storage requirement.Therefore, among another embodiment, can define a process, a plurality of code words relevant with a transmission level are mapped to the relevant code word of corresponding a plurality of and other transmission level.For instance, defining-the PCM codeword table occasion of the ANSpcm signal of 0.5dBm0 level, process can relate to each other PCM code word of mapping to its corresponding PCM level, dwindle according to required transmission level level is converted, with this as a result level be quantized to immediate PCM level, and be transformed into corresponding PCM code word.Therefore, in DPCM transmitter and APCM receiver, can use identical mechanism to constitute corresponding ANSpcm signal, therefore, on each side, produce identical PCM codeword sequence.Notice that according to present embodiment, quantizing rule should be wanted accurately when " deuce (tie) " handled in quantizing, " deuce " is if be meant that two PCM level are with equidistant through the level that converts.For instance, this rule is meant in the deuce situation and chooses near zero PCM level.
According to another embodiment, the entire method that defines the ANSpcm signal should be according to the predetermined deduction that produces the PCM codeword sequence of representing the ANSpcm signal.For instance, signal can be defined as 2100Hz and be the strongest set of tones, and its medium pitch defines amplitude and initial phase in advance.Then, use the accurate quantizing rule in the deuce situation once again, quantize formed signal according to immediate PCM level.But, the method also will adopt to be sine or cosine function and tone can what does the total come to when synthetic the accurate definition of position, guarantee that the mode of calculating by the two ends unanimity carries out, so that can correctly detect the ANSpcm signal.
As mentioned above, APCM can expect the transmission of ANSpcm signal.Digital impairment relevant with communication channel and analog feature can influence the ANSpcm signal in the ANSpcm signal when DPCM is sent to APCM.Task 418 can be carried out to obtain the sequence received relevant with the ANSpcm signal point sequence by APCM.Then, APCM can execute the task 420 with some attributes that compare the sequence of being received and relevant previous some institute's memory attributes of being received sequence of communication channel of before having set up.In the embodiment of explanation, the previous sequence of receiving is digital impairment learning (DIL) sequence, belongs to the line search sequence.About this point, task 420 can determine whether the current channel characteristic is similar to its corresponding characteristic of channel of previous foundation.In the preferred embodiment, the channel characteristics that compares in task 420 is relevant with digital impairment in the channel.In other words, the digital impairment channel profile of task 420 meetings to be stored confirmed current digital impairment channel profile.With suitable APCM processor elements 420 (referring to the Fig. 3) that execute the task.
During the task 420, but but can be by this any characteristic, whole any characteristic and/or any measured signal or measured quantity relevant measured of receiving sequence measured of APCM analysis site/level with point/level.For instance, be contained in indivedual points of any number in the sequence of receiving or level can compare with corresponding points that are stored in APCM or level (point of being stored or level can be relevant with previous DIL process).If point/level of being received " conforms to " with point/level of being stored, if or the difference between institute's point/level of receiving and storing is in certain threshold value, just APCM can suppose current channel attribute conform to the channel attribute of being stored (referring to query task among Fig. 2 210).
But APCM implementation 421 with suitably obtain and store previous foundation with current channel be connected its certain attributes or characteristic.As mentioned above, process 421 can impel the APCM storage package to be contained in point/level nature in the DIL sequence of being received.Then, during task 420, use these numerical value in the past.About this point, for instance, be the follow-up DIL process of response with current join dependency, after task 420 was finished comparison, process 421 was used new DIL value and is upgraded numerical value in the past.
As described in reference to figure 2, if when task 420 decision channel characteristics did not fully mate, then modem system can return to traditional V.90 start-up course.Fig. 5 represents that V.8 APCM falls to being back to agreement and send traditional V.8 call menu (CM) message and gives DPCM.Then, the tradition that is used for APCM V.8 startup can prolong sequence 502.Be response CM message, DPCM can produce traditional V.8 carrying out in conjunction with menu (JM) message and according to traditional V.8 initialization (with sequence 504 expressions).For purposes of illustration, starting processing 400 fast can supposition tasks 420 determine current communication channel to be similar to the communication channel of previous foundation.
If APCM confirms current channel characteristics by previous channel, then it can trigger quick startup routine with further minimizing initialization time relevant with modem system.Perhaps, DPCM can be configured to trigger quick startup routine.Therefore, during the modem system initial training, can execute the task 422.(for brevity, the part of the part of task 422 and follow-up work can be carried out by APCM and DPCM; Start fast and handle this combination function in the single work of treatment situation of 400 explanations).Task 422 can impel APCM and DPCM initialization to respond some and the previous relevant stored parameter of setting up of communication channel.As mentioned above, the initialization of stored parameters and equalizer, echo canceller, transmission power level, initialize signal point constellation or the like or train relevant.But the operation of task 422 engagement process 421, it is preferably in order to obtain and to store and the previous initiation parameter of join dependency.About this point, process 421 can suitably design, so that after handling through consultation again, or in order to respond and previous relevant any situation or the incident of communication activity, in these parameters of general data pattern period storage of previous connection.Process 421 also can be configured to can careful ground storage errors setting or initiation parameter.
Typically V.90 connect in the situation, task 422 is relevant with 2 training stages.Use previous parameter, tradition V.90 stages 2 search and ranging process can be skipped or shorten to modem system, and skip or shorten tradition V.90 stages 3 digital impairment learning and initial training process.As shown in Figure 5, APCM and DPCM all can send training sequence (with the representative of TRN1 signal) during task 422.These training signals can be convenient to the training of modem system in addition in order to suitable adjustment equalizer and echo canceller filter tap.Therefore, can and train this effective means, carry out V.90 and to start wherein one section time-consuming process (training of APCM equalizer) with enough time fine tunings.
The initial training during betiding task 422, also can execute the task 424.During task 424, modem system can be carried out error correction and/or data compression protocol.In traditional V.90 modem system, follow V.42 suggestion for error correction, V.42bis suggestion is then followed in data compression.For instance, with generally V.90 in the operator scheme of PPP join dependency, in the end after the training and before the CHAP/PAP discrimination process, V.42 execution reaches V.42bis process.Because the CHAP/PAP process is suitable for " zero defect " channel, V.42 reaches V.42bis so carried out before the CPAH/PPP process.Different with traditional V.90 system, V.42bis task 424 can be carried out during the stage 3 that V.90 starts.V.42bis in starting processing, be offset forward and help to reduce the connect hours.Among Fig. 5, the revision of the V.42XID signal that the representative of XID signal is traditional.For instance, the XID signal can utilize the subclass of the XID parameter that is used to consult to compress or the like.Also can cooperate different corrected signal sequences shown in Fig. 5 to carry out the V.42bis part of process.For instance, the tradition of CPt signal representative and one or more V.42bis signal combination signal V.90CPt.
In the preferred embodiment, the process V.42bis carried out is to provide actual " zero defect " channel.After the task 424, CONNECT message can be issued host software.CONNECT message represents that modem system has been ready to send data by original data rate this moment.Can carry out format, generation and the transmission of CONNECT message according to known technology.
Be response CONNECT message, host software begins the upper-layer protocol login process of one " simultaneously ", is CHAP or PAP process (task 428) for instance.Task 428 can be by host software initialization automatically or the initialization automatically in order to respond user's login.The CHAP/PAP data send and can cooperate last training managing.In the preferred embodiment, APCM and DPCM can be used as the CHAP/PAP authentication data as the scramble numerical data and send on communication channel.The scramble of authentication data makes modem apparatus to carry out last training to authentication data.In traditional V.90 modem system, last training signal can be formatted into scrambling signal.Scrambling signal is carrying information not; Last training signal is only as the white source on the frequency spectrum.When modem apparatus was finished training managing, the present invention can make last training signal balance with carry user data.Though the CHAP/PAP data are the preferred versions of user data,, the invention is not restricted to the transmission or the exchange of authentication data.In addition, specific scramble deduction also can be with using different the variation.
Among Fig. 5, difunctional signal is to represent with TRN2A/PPP.About this point, acceptance division in the modem apparatus can be during the very first time (for instance, during data phase 1) train so that they can be during follow-up time (for instance by original data rate, during data phase 2), seamlessly be transformed into by final data speed and operate.In addition, during the very first time but not after modem system is initialised fully, carry out the PPP login process by original data rate.
At the original data rate time durations, can execute the task 430 so that APCM and DPCM can exchange constellation parameter and modulation parameter (among Fig. 5 with CP and MP signal indication) in a suitable manner.Can execute the task 430 by traditional V.90 mode.During follow-up data pattern, these parameters can be used by modem apparatus.After finishing training and discrimination process, system preferably is converted to full data rate with seamless way.Can execute the task 432 so that carry out the data transmission by full data rate.Can be considered data phase 2 this period.In case modem system enters all data pattern, start fast and handle 400 constipation bundles.
With respect to the V.90 modulator-demodulator startup of tradition of general introduction in the table 1, shown in following table 2, it is slow to experience a startup of shortening according to modem system of the present invention.Note, be about half of start-up time of general introduction in the table 1 in the table 2 start-up time of general introduction.Under a lot of occasions, particularly use V.90 or existing 56kbps modem system carries out the PPP dialup internet and connects in the situation, start the slow considerable shortening that is expected.
Agreement Operation Time (second)
-- Dial and connect 1
-- Set up and call out 1
V.8bis (shortening) Exchange capacity 1
uu Revise answering tone 1
V.90Phase 3 +V.42/V.42bis Initial APCM training; Error correction; Data compression 2.5
V.90Phase 4+ login Last PACM training; The setting power level; Constellation sends; User's name and password 2-5
Sum=8.5-11.5
Table 2-is V.90 modulator-demodulator startup fast
In other situation, can implement technology of the present invention to have no progeny in minimizing circuit damage incident or the channel and to connect relevant reinitializing the time again.For instance, a lot of telephone subscribers may leased telephones intercut, caller identification, and other telephone service.But if telephone wire is used for modulator-demodulator when connecting, these services may not activate or not act on.If to intercut not be when not starting to phone during modulator-demodulator connects, then signal tone can interrupt modulator-demodulator and connects.If the user determines to answer when intercutting phone, then hang on and the flashing light that hangs up microphone may make modem system train its receiver again or facilitates completely connection procedure again.
Modem system can be configured to utilize that the simulation of storage and digital impairment information, equalizer settings, power level, echo canceller are set, constellation or the like, and does not carry out connection more consuming time or training process again.If connecting the telephone device place that is intercutted process, tap by phone, channel hangs on situation, caller identification request or any channel when damaging incident and interrupting, no matter this incident is planned or unintentionally, this canned data just can be in order to reset modem parameter immediately.In this situation, the client computer modulator-demodulator can be stored relevant system property, modem operation parameter, channel characteristics and/or network characteristic with server modem.
In one practical embodiments, for the response phone intercuts sound, the client computer modulator-demodulator can enter standby mode by announcement server.Server modem then switches to the FSK pattern with convenient server when idle, detection level 2 caller id informations.Answer second when taking on the telephone if the user will connect, then the client computer modulator-demodulator can periodically send standby signal or heartbeat sound to server, continues standby with given server.Take on the telephone and finish and user when wishing to begin data call when second, the client computer modulator-demodulator will begin to connect fast handshaking protocol (the following describes) again.On the other hand, if the user will stop first when taking on the telephone, then can send words whole message (or standby signal of end period).
As described in the brief description of reference previous channel parameter 342 and 382, connect handshaking fast again and can make modem apparatus call stored parameter and the attribute and the storage operation parameter relevant of standby channel again with modem apparatus.By this technology, modem system can connect in the time of calculating with second again.Therefore, the data pattern user handle to phone intercut or the caller identification signal after will can not suffer from tediously long reconnecting.When data pattern user uses phone to intercut in this way, can accept interruption intermittently, not connect relevant remarkable delay but do not have with modulator-demodulator.
Utilize this characteristics, can connect, simulation " always connecting " pattern by traditional PPP pattern.For instance, can periodically store relevant channel compensator information to given connection the between client computer modulator-demodulator and the server modem.Client user can answer come to second exchange line's phone and suspend data pattern as mentioned above simultaneously.In addition, during an audio call, data pattern can leniently stop if client user starts.The client computer modulator-demodulator can redial during voice-call termination, or the contact server modulator-demodulator is also set up a connection fast with institute's stored parameters again.
Fig. 7 is the flow chart of expression by quick connection processing 700 parts of two modem apparatus execution, and Fig. 6 is corresponding to the performed quick sequential chart 600 of connection processing again of two illustrated modem apparatus.Sequential chart 600 comprises prefix and the abbreviation that is generally used in traditional data communication protocol situation.Term as used herein is only in order to illustrate the notion of the present invention in the practical embodiments.But the present invention can be used in any suitable situation, the signal specific between two modem apparatus shown in Fig. 6, sequence number, sequence sequential, data rate, and reciprocation do not really want to limit invention scope.
After this modem system was set up communication activity, typically modem system entered after the full speed data pattern, can carry out fast connection processing 700 again by modem system.For the purpose of illustrating, can suppose the configuration (or being configured to support following different Processing tasks in a suitable manner) as mentioned above of modem system system.Can suppose and carry out handle 700 two modem apparatus and interconnection technique compatibility more fast described herein.Therefore, handle 700 and need not to carry out any affirmation or signaling to determine fast more whether connection procedure can be performed.
Though and failed call connection processing 700 more fast, modem system can be according to above-mentioned quick start-up technique initialization.Therefore, handle the information of initialization, training and the sync correlation of the 700 suitable channel characteristics of can supposition two modem apparatus all storing any number, receiver parameter and other and modem system.As mentioned above, during start-up course, can suitably store this information, or suitably store this information at suitable data pattern period.Handling 700 can use so that current modulator-demodulator connection can be rebuild after modem data pattern time-out or any interrupt event apace.In this case, actual system can keep communication linkage or connection between modem apparatus, and allows the user of client computer modem apparatus to suspend modulator-demodulator connection (or modem data communication pattern).At temporary transient waiting time, when the client-side modem apparatus was idle, the user can answer another and come to intercut signal to phone with the response phone, and the whereabouts that starts new is called out or the like.
Connection processing 700 can start from task 702 more fast, can be received by DPCM (modulator-demodulator shown in Fig. 3 302 for instance) during this period to connect indication again.Can produce and connect indication again with the time-out request (being the request that the user starts for instance) in the activity of response termination modem communication.For instance, can produce suitable microphone flashing light or response the instruction that application software produced relevant that signal starts with response APCM user that connect again by APCM (for instance for modulator-demodulator 304) with APCM.Perhaps, APCM relevant with APCM or data access configuration (DAA) can produce and connect signal again and respond and pick up the relevant electric current of state with the microphone of telephone set and change.Detection technique was known these those skilled in the art during this exchange line used.Connect indication again and can notify DPCM, the user wishes to rebulid the connection that is placed in the current modulator-demodulator for the treatment of temporarily.Among the actual embodiment, DPCM can receive to connect to indicate with originating task 704 again and be connected indication again with response.
During task 704, DPCM can send suitable return signal, and return signal is preferably notified and supported APCM connection procedure more fast.Among the embodiment described herein, this return signal can comprise aforesaid proper transformation sequence.Therefore, connection processing can execute the task 704 more fast, and task 704 is to be similar to the above-mentioned task 414 that cooperates Fig. 4 explanation.For instance, task 704 can make DPCM send the QTS signal so that APCM can determine the timing phase (representing the QTS signals with label 602 in Fig. 6) of DPCM once again.In addition, the QTS signal resends the RBS characteristic that can make APCM can obtain data communication network once again when wishing so to do (if need or).
It should be noted that for the modulator-demodulator connection of a lot of reality, modulator-demodulator waiting time, network connect (and numeral is filled out relevant effect of lining and RBS) and will keep consistent.Certainly, also have network and be connected modulator-demodulator waiting time end of calling to preserve the situation of internet resource.In these cases, if particularly identical network connects when not setting up as yet again, can't keep unanimity just the digital impairment profile of network is possibly.In addition, even the networking characteristic does not change, if but modulator-demodulator connects and to place etc. and to bide one's time (if particularly APCM in waiting time during not from the DPCM received signal), and it is synchronous that APCM can lose its RBS.About this point, even APCM can suitably make itself and network clocking synchronous once again after waiting time, but the specific RBS stage is still unknown.Therefore, connection processing 700 can be configured to preferably consider that network connects again fast, and this RBS sequence change.
Therefore return signal also comprises the proper signal point sequence of following after transform sequence, and after task 704, DPCM can execute the task 706 suitably to send signal point sequence to APCM.As state on the relevant task 416 described as, returning that signal point sequence can be regarded as revising beaten sound with a stick for instance, ANSpCffi signal (indicating with label 604 in Fig. 6).ANSpcm signal 604 can suitably be formatted into makes APCM can determine or discern current communication channel or the characteristic at networking, particularly numeral are filled out lining and * or other digital impairment.ANSpcm signal 604 also can be configured to provide and be suitable for the tone that makes the networking echo canceller not activate and the networking echo suppressor is not activated.
Among the actual embodiment, APCM can expect the transmission of ANSpcm signal 604.For instance, APCM can be configured to the conditioning receiver in case its send connect again indication to DPCM after, receive ANSpcm signal 604.Therefore, connection processing 700 can comprise query task 708 more fast, and it determines preferably whether ANSpcm signal 604 is received by APCM and/or whether DPCM receives that APCM has received the corresponding affirmation of ANSpcm signal 604.If for not, then handle 700 and can shift, modem system can carry out traditional routine of connection again.If when query task 708 determined ANSpcm signals 706 by corresponding reception, then APCM can handle the signal of receiving as mentioned above, makes APCM can determine the digital impairment relevant with the channel that rebulids.
Preferably execute the task 710 so that two modem apparatus can call and obtain characteristic and the parameter with previous channel join dependency again, previous channel is that modulator-demodulator connects the channel that places before the temporary transient standby.Task 710 can be impelled the previous channel information of DPCM access 342, and impels the previous channel information of APCM access 384.As mentioned above, this information can comprise and following one of relevant or multi-parameter more: the setting of any number that current channel conditions (as previous decision) is correlated with the modulator-demodulator receiver, communication network characteristic or the like.Task 710 makes modem system can retrieve these stored parameters apace and resets modem apparatus by rights, with independently reappraising of replacement channel, and replaces complete retraining processing.In case DPCM receives when connecting identification mark more once again from APCM, can execute the task 710 by it, and before receiving ANSpcm signal 604, APCM can execute the task 710 by APCM.When if task 710 was carried out by APCM, then the APCM equalizer can be initialised according to previous channel information 384, so that ANSpcm signal 604 can correspondingly be received and be analyzed.
DPCM can obtain it regularly synchronously again according to multiple technologies, and for instance, these technology can be V.34 (International Telecommunications Union, in September, 1994) tradition of disclosing half-duplex main channel synchronizing process V.34 of ITU-T suggestion, by reference at this as reference.In other words, as shown in Figure 6, APCM can be configured to send PP signal 610 so that the DPCM receiver can make its timing recovery and carrier wave recover synchronously.S and S preface signal (code name is respectively 606 and 608) can be in order to starting automatic gain control elements or the like.BI signal 612 can be regarded as in order to start the preface sequence of DPCM scrambler, trellis encoder or the like.These signals and sequence at length are disclosed in the V.34 suggestion, no longer describe in detail herein.
Simultaneously, DPCM can send R signal 616, then send R signal 618 and B1 signal 620.These sequences are also as making APCM can prepare the suitable preface sequence of data pattern.These signals and sequence are specified in the V.90 suggestion, no longer describe in detail herein.
For responding synchronizing sequence again, modem system can enter data pattern and system begins to send data (task 712) with full data rate.In other words, data reconstruction sending mode and need not fully stop previous connection.Data pattern system is by sequence 614 and 620 expressions in Fig. 6.Note, with quick startup handle 400 different, fast again connection processing 700 need not carry out channel characteristics comparison (referring to task 420), initial training process (referring to task 422), error correction and data compression process (referring to task 424), last training process (referring to task 428), differentiate exchange (referring to task 428) or the exchange of constellation and modem parameter (referring to task 430).About the PAP/CHAP authentication information, modem system can suitably be configured to keep the PPP/TCP/IP agreement at waiting time, so that the PPP authentication data need not be sent out.Therefore, modem system can be rebuild its modulator-demodulator and connect, and carries out several traditional initial work and need not lose time.In the system of typical duty border, can adopt fast connection processing data reconstruction pattern in again less than 1.5 seconds time.
Another version of connection procedure can adopt and be similar to this sequential chart of sequential chart 500 (with reference to figure 5) more fast.But among this embodiment, several sections in the above-mentioned signal section relevant with sequential chart 500 can reduce on length, thereby reduce traditional connect hours again.For instance, because different TRN training sequence and parameter switching signals need not carry essential information, so they can shorten considerablely.Because actual enforcement needs, may wish to make in this way general sequential structure to be kept perfectly (replace and from sequential chart 500, eliminate section).In fact, from the viewpoint of software implementation, can adjust section length by quite direct mode, be consuming time and difficult task and remove whole section from present agreement.Though the connect hours again of another embodiment than above-mentioned with reference to the illustrated time (for instance, reaching 2.5 seconds) of sequential chart 600 also long,, it still has significant minimizing than carrying out traditional required time of the process that reinitializes.
As discussed previously, when telephone wire was used for the modulator-demodulator connection, phone intercutted and relevant phone features has trouble.For the response phone intercuts alarm signal, modulator-demodulator connects and can be interrupted usually, and modem apparatus is not known the reason that interrupts.Phone intercuts alarm signal and can cause the modem apparatus broken string or enter tediously long training mode again.In addition, in a lot of situations, the consumer can not utilize phone to intercut service.Generally speaking, the present invention is with following described mode head it off: (1) allows either party's modem apparatus request words immediately to intercut caution with the response phone eventually; (2) allow the first modem apparatus request second modem device to enter wait, and allow the second modem device to accept or the refusal request; And (3) modem apparatus request connection procedure (as mentioned above) more fast of allowing the either party.By this signaling technology, modulator-demodulator connects can be terminated calling, be placed in wait or connection more fast, intercuts alarm signals such as caution such as phone with response.Equally, bide one's time, then after waiting time, can adopt identical signaling mechanism to connect the modulator-demodulator period again if modulator-demodulator connects to be placed in etc.
When if two end devices (for instance, V.90 DPCM in the system and APCM) wait for that with modulator-demodulator characteristic is compatible, then utilize the appropriate signaling design so that end device can be when needs switching operation modes.Though this is to design and different processing in the modem system occasion explanation signaling of server or central authorities' end at client-side and DPCM with APCM, the invention is not restricted to this.For instance, technology described herein can be applied to the situation of communication activity between the two client computer modem apparatus or the situation of modem system V.34 equivalently.
Figure 16 is modem system 600 exercisable illustrational environment schematic drawings.Modem system 1600 comprises first modem apparatus 1602 usually and second modem device 1604, the first modem apparatus 1602 are relevant with center side, and second modem device 1604 is positioned at client-side 1670.Typically V.90 in the system, first modem apparatus 1602 can be DPCM, and second modem device 1604 can be APCM.DPCM1602 can be coupled to central office 1606 via the numeral link, and APCM1604 can be via being coupled to central office 1606 such as simulations such as local loop link.Should be appreciated that modem system 1600 can comprise increase element and with above-mentioned quick startup routine and/or the quick relevant function of connection procedure again.
The serial answering device 1611 that Figure 16 also illustrates calling device 1608 (it can place client-side to calling in the future), is positioned at the parallel answering device 1610 of client-side and is positioned at client-side.Parallel as shown in figure 16 answering device 1610 can connect into it and receive identical calling with simultaneous system with APCM1604.And serial answering device 1611 can connect into APCM1604 calling is passed to it: APCM1604 can control in a conventional manner or regulate and pass to or from the call business of serial answering device 1611.Via central office 1606, between calling device 1608 and answering device 1610 and 1611, set up to call out, and via central office 1606, between DPCM1602 and APCM1604, set up modulator-demodulator and be connected.
Generally speaking, modem system can be configured to support signaling mechanism, other situation that signaling mechanism system response phone intercutted and may need to interrupt the modulator-demodulator connection.For instance, APCM1604 can send the signal of appropriate formatization to start the modulator-demodulator wait state, DPCM1602 can send different signals and wait for request to confirm modulator-demodulator, APCM1604 can send a signal again and start to ask fast connection procedure (as mentioned above) again, and either party's modem apparatus can send the representative words signal of request eventually.For brevity, Figure 16 relevant mode of described illustrational processing that Clicks here, illustrate that APCM1604 and DPCM1602 are in practical embodiments, each modem apparatus all can be as sending or receiving modem, and each modem apparatus can produce unlike signal described herein.
DPCM1602 comprises sending part 1612 and acceptance division 1614, and both all can dispose according to traditional technology and according to the explanation (referring to Fig. 3) of above-mentioned modem system 300.DPCM1602 can send some signals, sequence and tone during initial procedure, data pattern, standby mode and sending mode.As mentioned above, DPCM1602 can be configured to send suitable transform sequence 1616 and with start routine or connection procedure is relevant more fast characteristic signal point sequence (being ANSpcm signal 1618 for instance) 11 fast.During data pattern, DPCM1602 can send design to send data 1620 according to suitable data.
DPCM1602 also can send can be by some signals of APCM1604 and/or central office's 1606 receptions.For instance, as described here, DPCM1602 can send " A " tone 1622 and " B " tone 1624.In the embodiment on a duty border, " A " tone 1622 is the tone of 2400Hz, and " B " tone 1624 is the tone (V.34 disclosing as the ITU-T suggestion) of 1200Hz.Certainly, modem apparatus can produce and handle any suitable tone or signal to replace (or increasing) these predetermined tones.DPCM1602 also can be configured to send some with the initialization of modulator-demodulator standby mode, waiting time after the modulator-demodulator period connection again, and modulator-demodulator connect the words relevant signal that increases such as eventually.For instance, DPCM1602 can sending modem waits for request 1626, modulator-demodulator wait acknowledge 1628, connection request 1630 and interrupt signal 1632 (being called " modem state signal " herein) more fast.The form of these signals and function will be in explanations in more detail below.
DPCM1602 also comprises signal detection component 1634, and it can use any known technology to detect, to analyze and explain control signal, request and the tone that APCM1604 and/or central office 1606 are sent.For instance, signal detection component 1634 tradition that can utilize traditional pitch detector and/or be configured to detect and differentiate unlike signal described herein differential shift key (DPSK) receiver V.34 or V.90.
As signaling design described herein,, preferably dispose APCM1604 by the mode that is similar to DPCM1602.In other words, APCM1604 can send " A " tone 1642, " B " tone 1644, modulator-demodulator and wait for request 1646, modulator-demodulator wait acknowledge 1648, connection request 1650 and interrupt signal 1652 more fast.In addition, APCM1604 can be configured to produce calling part ID tone 1654 with notice central office 1606, and client-side is supported calling part ID characteristic (described as calling part ID element 1656).According to Current Standard, calling part ID tone 1654 has DTMF " D " tone of about 55-65 millisecond length.Certainly, APCM1604 can send data 1658 during data pattern.
Described as above-mentioned relevant DPCM1602 explanation, APCM1604 preferably comprises signaling detecting element 1660, and it makes APCM1604 can receive, detect and analyze different signaling tones and sequence that DPCM1602 sends.In this way, APCM1604 and DPCM1602 can received signals, and can switching operation modes with response signal specific or the signal received.
Central office 1606 can be configured to carry out the circuit relevant with modulator-demodulator, my sound and fax telephone in a conventional manner and switch.Central area 1606 can support the client-side central office 1606 of any number can be coupled to other central office of any number, center side modulator-demodulator or the like in operation.As top summary, APCM1604, answering device 1610 and calling part ID element 1656 can be positioned at client computer one side 1670.Therefore APCM1604, answering device 1610, and calling part ID element 1656 support by central office 1606.
Central area 1606 comprises suitable exchanging network 1672 to arrange the route of calling between suitable each side.For instance, exchanging network 1672 can switch to first state being connected setting up modulator-demodulator between DPCM1602 and the APCM1604, and second state that switches to is to be connected setting up voice between calling device 1608 and the answering device 1610.In addition, exchanging network 1672 can temporarily interrupt connecting, and control signal, data or tone are sent to current circuit or exchange line.About this point, central area 1606 visual specific situations and send some bell signals 1674, alarm signal 1676, calling part ID data 1678 and other information.For instance, according to current approach, central office 1606 can temporarily interrupt voice call and send phone and intercut signal 1676 to client-side 1670.If client computer receives incoming call, just exchanging network 1672 can be configured to arrange calling to client-side 1676 again, and original phone can be placed in wait state.As following detailed description, adopt similar route that modem call is placed wait.
As discussed previously, stages 2 signaling is preferably adopted in signaling design, and it also is to reach V.34 V.90 by tradition that modem system is used.In addition, the DPSK transmission technology is used in signaling design, its allow signaling with seamless way with V.34 reach V.90 retraining process synthesis.Signal can be configured to them and can be detected by receiver V.34/V.90DPSK or quite simple pitch detector.In a practical embodiments, modulator-demodulator is waited for request, modulator-demodulator wait acknowledge, connection request and interrupt signal can take the lead tone A or tone B a period of time (at least 50 milliseconds for instance) more fast.V.34, this technology balance is traditional reaches the A that V.90 modem system adopted and the use of B tone, and utilizes by the used modulation design of modem system.Therefore, because can be by conditioning to receive dpsk signal on the DPCM1602 typical case, signaling design duty is easily executed.
Follow the modem state signal of A or B tone and preferably be used as the dpsk signal transmission according to the bitmap that repeats.In preferred embodiment, the dpsk signal that modem state signal system is relevant with four bitmaps of eight repetitions, the modem state signal that wherein different patterns is corresponding different.Wish to use four bitmaps so that simple pitch detector can be used in signaling detecting element 1634 and 1660; Short bitmap causes the fewer frequency content relevant with dpsk signal.As a result, the input design need not be adopted the complex process routine of the spectral content of analyzing a large amount of frequencies.The bitmap that is used for different modem state signal instruction is shown in following table 3.
The modem state signal The signal abbreviation The DPSK pattern
Interrupt signal DC 0101
Modulator-demodulator is waited for request MH 0011
The modulator-demodulator wait acknowledge MHA 0001
Connection request more fast QPR 0111
Table 3-modem state signal
Preferably choose specific bitmap so that formed dpsk signal can be used for the dpsk signal difference of other data communication protocol situation with " reservation ".For instance, all be that 0 DPSK pattern equals A or B tone, and all be that 1 DPSK pattern equals V.34 INFOMARK signal.In addition, special bitmap can suitably be chosen so that formed dpsk signal is detected by pitch detector easily.For the example bitmap shown in the table 3, the modem state signal is listed frequency content in table 4 and the table 5 below, its medium frequency is unit with the hertz, and the X representative is greater than the spectral content of threshold level, and the dotted line representative is lower than the spectral content of threshold level.For the example DPSK bitmap shown in the table 3, lower spectrum energy composition is than the low 8dB at least of higher frequency spectrum energy ingredient of same frequency.As a result, even if some shared frequency content exists, still can distinguish different modem state signals.
900 975 1050 1125 1200 1275 1350 1425 1500
DC X X
MH X X X X X
MHA -- X X --
QRR X -- -- X
Table 4-is used for modem state signal frequency composition (APCM)
2100 2175 2250 2325 2400 2475 2550 2625 2700
DC X X
MH X X X X X
MHA -- X X --
QRR X -- -- X
Table 5-is used for modem state signal frequency composition (DPCM)
The employed different frequency scope of APCM and DPCM uses the illustrational application of different carrier institute relevant with two modem apparatus.For instance, in traditional V.90 system, DPCM uses the signaling (tone B and DPSK carrier wave) near 2400Hz, and APCM uses the signaling near 1200Hz.These characteristics are derived from traditional V.34 design, and in this design, callback modem uses near 1200Hz and answers the modulator-demodulator use near the 2400Hz signaling.As a result, two spectrums pattern frequently can be identical, but be offset between 1200Hz and 2400Hz.Even when the method was guaranteed the signal of two proper transmission same types, end device can corresponding detection signals.
In the system of reality, the modem state input need not to detect whole " the frequency spectrum fingerprint " of given signal. Signal detection component 1634 and 1660 is configured to detect and analyze in order to indicate coupling the frequency spectrum composition of different numbers.For instance, as shown in table 4, if containing, signal is positioned at 1050Hz and the quite high spectrum energy of 1350Hz, then signal can be interrupt signal or modulator-demodulator wait request.Therefore, the input routine will continue analytic signal at the spectral content of 900Hz, 1200Hz and/or 1500Hz and make corresponding judgement.
Fig. 8 illustrates current modulator-demodulator to connect and intercutted indication by phone and interrupt and come when phone is answered by client-side modulator-demodulator connection to be placed in the sequential chart of the situation of wait.No matter client-side 1670 adopts parallel answering device 1610 or serial answering device 1611, Fig. 8 all can use signal, sequence, tone, order, or the like demonstration relevant with APCM, DPCM and central office (central office can be by signal with the APCM associated and press signal and with the DPCM associated).For simplicity, this is under modem system 1600 situations, and the processing relevant with Fig. 8 is described.
During data pattern, central office 1606 can temporarily interrupt the modulator-demodulator connection and alarm signal 802 is delivered to APCM1604.Alarm signal can be traditional phone and intercuts caution, and it comprises the composition that the mankind can hear (being the audio frequency tone for instance) and can be by the composition of communicator or mechanical detection.Intercut agreement according to most of phone, alarm signal becomes branch to send according to the order of sequence.Be response alarm signal 802, APCM1604 can send dtmf tone and transfer 804 to ask calling part ID information to central office.As mentioned above, tone 804 can be the short pulse of DTMF " D " tone with about 55-65 millisecond duration.Receive also identification dtmf tone accent 804 as if central office 1606, then it can format calling part ID data 805, and sends it to client-side 1670.As shown in figure 16, receive and handle calling part ID data 805 (representing with label 1678 among Figure 16) by rights, show or analysis by the calling part ID element.
Central office 1606 cuts off APCM1604 for response, and DPCM can be by sending such as appropriate signals such as " B " tones 806 with beginning retraining process.In the application of reality, when calling part ID request 804 and calling part ID data 805 were just received, handle and sent by central office 1606, " B " tone 806 can be sent out usually.When DPCM1602 waited for that APCM1604 replys with " A " tone 808, " B " tone 806 can be sent continuously.If when APCM1604 received " B " tone 806 from DPCM1604, it can send " A " tone 808.As mentioned above, " A " tone 808 preferably is sent out the minimum at least duration (being 50 milliseconds for instance), goes to receive it to give the DPCM1602 chance.If DPCM1602 does not receive " A " tone 808 in during specific, then it can make at last and itself interrupt.
If the user of APCM1604 wishes to answer to phone, then modulator-demodulator waits for that request 810 can be sent out after " A " tone 808.Modulator-demodulator wait request 810 appropriate device by client-side 1670 places automatically provide or are prompted with the response user command.Modulator-demodulator waits for and asks 810 can format as mentioned above that it can preferably be sent out minimum at least a period of time.In the embodiment of a reality, modulator-demodulator waits for that request 810 can be sent out about 53 milliseconds (all modem state signals described herein can have the similar minimum duration).Be different from traditional V.34 or V.90 modem system, when receiving " A " tone 808 at DPCM1602, can not carry out real retraining process.But wait for request 810 in order to respond modulator-demodulator, DPCM1602 meeting sending modem 812 minimum a period of times of wait acknowledge, for instance, about 53 milliseconds.
After DPCM1602 sending modem wait acknowledge 812, when it kept wait state, it can preferably continue to send " B " tone 806.Be response modulator-demodulator wait acknowledge 812, APCM1604 can produce suitable flash signal 814 and cut off calling 816 incisions that modulator-demodulator connects and will enter with indication central office 1606.In addition, mobile phone (or other suitable returning is beaten device with a stick) can close the beginning and receive signal that the calling of coming in: APcM1604 can be configured to arrange in a suitable manner to enter to parallel answering device 1610 or serial answering device 1611.(during the cycle 818) APCM1604 can be placed in idle or " receiver hangs up " state when mobile phone connects in addition, therefore, and the calling 816 that the user at client-side 1670 places can enter, and DPCM1602 keeps wait.Modulator-demodulator connects can be by speed modem connection procedure and rebuild (in explanation down) again.
Fig. 9 is a sequential chart, illustrates that DPCM1602 will connect the situation of the calling termination that enters with response again.Processing shown in Fig. 9 is supposed: (1) DPCM1602 system is in wait state: (2) are returned and beaten device 1610 with a stick is parallel with APcM1604: reach the calling that 1610 terminations of (3) answering device enter, for instance, be placed in " receiver hangs up " before at calling device 1608, return and to beat device 1610 with a stick and be placed in " receiver hangs up ".For this point is described, parallel mean APCM1604R return beat device 1610 with a stick can be in the mode of while from the identical signal of central office's 1606 receptions.
The termination of the calling that enters for response, central office 1606 will detect " hanging up " in a conventional manner, for instance, use the exchange line detection technique of knowing.At last, central office 1606 can cut off or the calling interrupting entering, incision DPCM1602, and produce such as appropriate signals such as bell signals 902.Bell signal 902 is still being waited for and is being ready to connect again in order to the original phone of the user at caution client-side 1670 places.Be response bell signal 902, APCM1604 can be placed in " picking up a receiver " so that they can be once again from central area 1606 received signals.Therefore, bell signal 902 notice APCM1604, end has been talked about in the calling that enters and/or APCM1604 can proceed modulator-demodulator connection procedure again.As with reference to state on the figure 8 described as, APCM1604 can produce " A " tone 904 (at least 50 milliseconds) with the response " B " tone 906 detection.After " A " tone 904, APCM1604 can send fast connection request 908 to start fast connection procedure (state on the situation as Fig. 6 and 7 described as) again again.Therefore, for responding the fast detection of connection request 908 again, DPCM1602 preferably sends QTS signal 910, ANSpcm sequence 912 follow after.The characteristic of QTS signal 910, form, and function as mentioned above.If two modem apparatus are all supported the above-mentioned characteristics that connect again fast, the modulator-demodulator that then can rebulid wait in the quite short time connects.
Figure 10 is a sequential chart, illustrates that parallel answering device 1610 is placed in r and puts down microphone.The situation that the calling that before enters is terminated.In this case, when the calling that enters was begun to stop by calling device 1608, central office 1606 can be connected to client-side 1670 original calling (connecting for modulator-demodulator in the present embodiment) again.As a result, the MB that sends by DPCM1602.Tone can be obtained in the APCM1604 place once again.No matter whether APCM1604 is current in " picking up a receiver " or " hanging up receiver " state, whether it can preferably detect DPCM1602 and connect again.Should be appreciated that APCM1604 can adopt the technology (visual certain embodiments and become) of knowing of any number to connect to detect again.For instance, DPCM1602 can detect it " B " tone from DPCM1602, and it can reaction automatically after predetermined time out, or utilizes the termination of the calling that the exchange line use enters with sensing with technology.Connecting routine fast again in case two modem apparatus are obtained when communication each other again can be as carrying out with reference to stating on the figure 9 as described.
About the situation shown in Figure 10, may need to make APCM1604 to respond within a certain period of time and attempt being considered as microphone flicker or interruption to guarantee that central office 1606 will not connect again.For instance, in preferred embodiment, APCM1604 is configured to the termination of the calling that response enters in 200 milliseconds, so that central office 1606 can not be considered as Conference Calling request (it may cause DPCM1602 to be placed in wait) or interrupt (it may cause connection termination) postponing.Can according to such as Bel's core technology with reference to GR-506-CORE (BELL CORE TechnicalReference GR.506.CORE) (relevant) and Bel's core technology with general communication signaling with reference to any suitable telecommunications suggestion, standard or operating protocols such as TR-NWT-000575, choose specific time span.Be dissolved in these in these references and incorporate reference into.
Generally speaking, use employed any process in the situation of system of parallel answering device 1610 also to can be used for using the situation of the system of serial answering device 1611.But, otherwise may not be for very.For instance, Figure 11 is a sequential chart, the situation that the calling that demonstration enters is stopped by serial answering device 1611.GD the above, at first the communication exchange line at client-side 1670 places provides APCM1604 signal from central office 1606, and APCM1604 can be routed to signal answering device 1610 in most practical application.Even APCM1604 only is routed to calling serial and returns when beating device 1611 with a stick, it still can be kept and " hang up receiver.。Therefore, APCM1604 can Bureau look to detect " B.Tone the or whether proper signal relevant with DPCM1602 exists.In this case, if when the calling that enters stops (stopping) by calling device 1608 or by serial answering device 1611 ' then APCM1604 can be from central office's 1606 received signals.In addition, central office 1606 can communicate by letter with client-side 1670 with the detection of response calling termination by switching DPCM1602.Therefore, if when detecting " B " tone by APCM1604, it can be immediately and serial answering device 1611 de.In case two modem apparatus are obtained communication activity again, then connecting routine fast again can be as brightly carrying out as described with reference to stating on the figure 9.
Figure 12 is a sequential chart, illustrate that DPCM1602 waits for the situation of request (Figure 12 can be applied to the serial answering device 1611 or the system of parallel answering device 1610 of using) till modulator-demodulator waits for that request 1202 is sent to DPCM1602 from APCM1604 to talk about whole commanded response modulator-demodulator, processing all is similar to reference to stating on the figure 8 bright.The situation of confirming modulator-demodulator wait request 1202 with DPCM1602 is different, and the situation shown in Figure 12 need send interrupt signal 1204 from DPCM1602.DPCM1602 can just send interrupt signal 1204 after expecting or considering the operating parameter of any number such as Functional Capability, channel characteristics such as current calling flow, DPCM1602
It can leave unused or wait for and does not send any significant signal after DPCM1602 sends interrupt signal 1204.Be response interrupt signal 1204, APCM1604 can stop the calling of modulator-demodulator connection in a suitable manner.If central office 1606 does not detect the activity from APCM1604 yet after such as 1550 milliseconds suitable blocking period, then it can suppose that APCM1604 is interrupted.Afterwards, central office 1606 can cut off DPCM1602﹠amp; Produce bell signal 1206 and calling part ID data 1208 to client computer 1670, so that can answer the calling that enters.After the time out suitable such as two seconds etc., DPCM1602 can make its data connection termination call out, and during time out, DPCM1602 does not receive signal from APCM1604.Therefore, in case when central office 1606 begins to produce bell signal 1206, can stop call on the DPCM1604 typical case.As mentioned above, APCM1604 and/or DPCM1602 can store any relevant operating parameter so that the startup fast of follow-up connection before stopping call.
Under some situation, the terminal use can wish to stop immediately the calling that modulator-demodulator connects and accepts to enter.Figure 13 is a sequential chart, is shown as response alarm signal 1302, and APCM1604 can send interrupt signal 1304 and the situation of dec non-modem DEC wait request.Figure 13 can be applied to the serial answering device 1611 or the system of parallel answering device 1610 of using.APCM1604 can produce interrupt signal 1304 with the response user command, or automatically according to predetermined agreement or setting.In fact be similar to and relevant it of Figure 12 of signal relevant with Figure 13 and operation carry out.But different with the processing shown in Figure 12, APCM1604 can send interrupt signal 1304 to DPCM1602
Figure 14 is a sequential chart, is shown as response alarm signal 1401.APCM1604 facilitates fast connection procedure again and ignores the situation of the calling that enters.Figure 14 can be applied to the system that uses serial answering device 1611 or parallel answering device 1610.When the calling that is not entered as the terminal use is bothered, if and/or modulator-demodulator connect when seriously being influenced by alarm signal 1401, then when the quality of modulator-demodulator connection was important, this situation can take place.In addition, this situation may take place with the response calling part ID, that is answer can be to select to ignore the calling of advancing from some calling party.， ﹠amp till the point that " A " tone 1402 is sent out; Process be similar to the process of Fig. 8.After " A " tone 1402 passes, APCM1604 can produce fast again connection request 14 fast again connection request 1404 finally can receive by DPCM16.For responding fast connection request 1404, DPCM1602 can send QTS signal 1406 again, and ANSpcm1408 is connected on thereafter so that connect again fast routine (as ginseng state on 6 and 7 described as).It should be noted that APCM160 person can send such as suitable modem state signals such as phasing backs, number state signal system indicates retraining process completely but not connects journey more in this embodiment fast, and the retraining process can be carried out in a conventional manner.
In some cases, DPCM1602 can " not enter initial retraining pattern with the response alarm signal automatically.In other words, (1602 meetings are just like as not being interrupted, continue to send data for DP.The sequential chart of this situation of figure system explanation (Figure 15 can be applied to use tandem to return to put 1611 or the system of parallel answering device 1610).GD with state on Fig. 8 bright as, APCM1604 can between the rest periods of data mould, send DTMFFDJ tone 1504 (with show the request relevant), with the response alarm signal 1502.Different with Fig. 8, DPCM1602 state is interrupted the result and begins to send ' tone.DPCM160Z continues to send data 1506 to A.PCM1604.1606 when connecting again after APCM1604 is by central authorities, and it preferably sends 1,508 one sections reasonable times of " A " tone to allow DPCM1602 with 1510 responses of " B " tone.When APCM1604 detected from it " B " tone of DPCM1602, it was then with SIGNAL.1512 follow after " A " tone 1508 wherein SIGNAL^1512 can be modulator-demodulator and waits for request, connection request or interrupt signal more fast.Be response SIGNAL^1512, DPCM1602 can send SIGNAL.1514, wherein SIGNALD can be modulator-demodulator wait acknowledge, QTS signal and ANSpcm sequence and follows the quiet or interrupt signal in the short time of back.In this way, even DPCM1602 fails initially to enter the retraining pattern along with the transmission of " B " tone, still can handle above-mentioned different situation.
Can be applied to hold the difference request that starts from client-side 1670 equivalently with reference to stating signaling routine and process on the figure 8-16.The user of APCM1604 can wish current modulator-demodulator connection is placed wait, impels fast connection again or impels complete retraining with independent mode for instance.In the embodiment of a reality, modulator-demodulator wait request and modulator-demodulator wait acknowledge signal can be incorporated traditional Phase4CP and MP sequence into.Therefore, then ask modem apparatus can carry out rate renegotiation and reach and send waiting signal in a suitable manner if modem apparatus will place other modem apparatus waits (third-party call for instance).Can carry out this technology to be similar to traditional V.90 whole words process that V.34 reaches, wherein special sign indicating number (data rate 1) is in order to indicate whole words.But the modulator-demodulator signaling technology can utilize different positions compound or make the position balance of some reservations.
For responding this user request, APCM1604 can produce suitable data state signal (for instance, modulator-demodulator wait for request, fast again connection request, or the like) be connected on it " A " tone thereafter, to receive by DPCM1602.As state on the reference MIS described as, DPCM1602 then replys and follows at " B " of back tone and respond (modulator-demodulator wait acknowledge, QTS signal, or the like) for instance, with suitable status signal.In this way, technology of the present invention can be applicable to phone and intercuts caution, exchange line interruption or the relevant any pretty shape of exchange line damage incident.
At a duty Shi Lizhong, the invention provides and reduce initialization time general and that V.90 modem system is relevant and reach the technology of connect hours again.Startup and quick interconnection technique again can make the known channel characteristics balance of previous connection set up the relevant training time of identical connection to reduce follow-up trial fast.Though being not limited to appoint the river particular modem uses, but, can use quick start-up course to exempt the general initializtion protocol that adopts of all 9D56kbps modulator-demodulators or the part of processing, for instance, V.8biS, V.8 digital impairment learning initial training, exploration and range finding, or the like.In addition, compared to traditional modulator-demodulator start-up technique, start-up technique can be carried out some operation at different time or with different order fast.
Later with reference to figure 5, it was presented at during the stage 4 of V.90 training managing again, and APCM modulator-demodulator 590 and DPCM modulator-demodulator 580 can exchange different parameters respectively via CP and MP frame 510 and 520.Figure 17 shows the information and the parameter that can be contained in the not coordination in example MP sequence or the frame 1700.
With reference to Figure 17, as seen MP frame 1700 has synchronous form and comprises 17 sync bits with " 1 " (position 0:16), and opening that beginning position 1702 (position 17) is followed in the back and finish CRC position 1730 with the CRc1730 (position 171:186) of 16 positions by one is to use correctness with verification MP frame 1700 by APCM modulator-demodulator 580.As shown, MP frame 1700 also comprises reservation position 1704 (position 19) the MP frame 1700 that can use future and comprises again and confirm that position 1710 (position 33) confirms that position 1710 is " 0 ".Other information in the MP frame 1700 comprises data signaling rate, trellis encoder and chooses position, non-linear encoder selection of parameter position, constellation and choose that cover is covered in position, data signaling rate ratio, asymmetric data signaling rate activates and the preceding information of the sign indicating numberization of a lot of positions
Confirm that position 1710 can be set at " 1 " to acknowledge receipt of the CP frame 510 (referring to Fig. 5) that APCM modulator-demodulator 580 sends by DPCM modulator-demodulator 590.MP frame 1700 with the affirmation position 1710 that is set at " 1 " can be with 522 expressions (referring to Fig. 5) of MPE frame.It should be noted that MP frame 510 and MPE frame 512 all comprise the position and the information of similar number, but unique difference system confirms the value of position 1710.
With reference to Figure 18, the example definition position that shows CP frame 1800 is similar to MP frame 1700, CP frame 1800 be the frame of synchronized model to have 17 be a synchronously leading position 180f (position 0:16) of 1, one opens that beginning position 1802 (position 17) is followed in the back and finishes (position 273+6:288+6) with 16 CRC1830.CRC position 1830 can be utilized to investigate the correctness of CP frame 1800 by DPCM modulator-demodulator 590.As shown, CP frame 1800 also comprises the reservation position 1804 (position 18) that can use future.Confirm that position 1810 is " 0 ".Other information inclusion data signaling rate in the CP frame 1800, section when quiet, be used to compose sign bits, the constellation information of argument of type integer frequently and comprise a lot of other position information such as variable-length parameter,, can the extend size of CP frame 1800 of variable-length parameter.
Confirm that position 1810 can be set at " 1 " to acknowledge receipt of the MP frame 520 (referring to Fig. 5) that DPCM modulator-demodulator 590 sends by APCM modulator-demodulator 580.CP frame 1800 with the affirmation position 1810 that is set at " 1 " is with CP " frame 522 expressions (referring to Fig. 5)." frame 512 all comprises the position and the information of similar number, and unique difference is to confirm the value of position 1810 for CP frame 510 and CP.
With reference to Figure 19, the initial stage that demonstration may be contained in the CPa frame 1900 in the ITUV.92 suggestion defines the position.Be similar to MP frame and CP frame 1700 and 1800, CPa frame 1900 is the frame of synchronized model, and having 17 is 1 synchronously leading position 1901 (position 0:16), and one opens that beginning position 1902 (position 17) is followed in the back and finishes with 16 CRC1930.CRC position 1930 can be by the APCM modulator-demodulator (referring to Figure 24.) utilize to investigate the correctness of CPa frame 1900.As shown, CPa frame 1900 also comprises still undefined reservation position 1904 (position 21:23).CPa frame 1900 comprises again confirms position 1910 (position 33).The affirmation position 1910 that is used for CPa frame 1900 is " 0 ".Confirm that position 1910 can be set at " 1 " to acknowledge receipt of the CP frame (referring to Figure 24 c) that the APCM modulator-demodulator sends by the DPCM modulator-demodulator.Other information in the CPa frame 1900 comprises constellation information and the precoder with high-res and prefilter system receives and a lot of other information, and much other information system comprises the variable-length parameter of the length that can increase CPS frame 1900 significantly.
If V.92 the affirmation mechanism that V.90 V.34 ITU suggestion reach will be used for the ITU suggestion as reference Figure 17 and 18 as described, then " frame will comprise the position and the information of similar number, and unique difference is to confirm the value of position 1910 for CPa frame and CPa.
34 and V.90 in the suggestion exchange of employed parameter and affirmation mechanism in training managing, imports significant consumption and delay.As shown in Figure 5, modulator-demodulator 580 and 590 can send CP and MP frame 510 and 520 continuously till the acknowledgement frame of receiving from the far-end modulator-demodulator.Even acknowledgement frame will consume significantly and postpone to be directed in the Signal Exchange Processing, but the information bit of identical previous transmission still need not over and over again be sent.Because in most situation, the first transmission meeting of MP or CP frame is correctly received by the far-end modulator-demodulator, so, CP, MP, CP " and MP " these to send continuously and resend be unwanted.Therefore, owing to confirm that the position in fact is a most significant bit information, so becoming does not need to resend MP " or all information bit in the CP frame.
In order to exempt a large amount of consumption and delays during the Signal Exchange Processing, execute shown in the example as the duty of Figure 20-22, the present invention discloses short parameter frame.With reference to figure 2 (, R shows the example definition position of short MP frame (MPs) 2000.The woman with shown in, as with as the MP frame 1700, the frame of MPS frame 2000D synchronized model, having 17 is leading synchronously 20010 0:16 in position of 1), one opens beginning position 2002 (position workers 7) finishes in the back and with 16 CRC2030 (position 35:SC) with figure.CRC position 2030 can be utilized to investigate the correctness of MPs frame 2000 by APCM modulator-demodulator 58C.Shown in and for example same, MPS frame 2000 also comprises MPs marker bit 2004 (position 19) with difference MPs frame 2000 and MP frame 1700.With reference to Figure 17, the corresponding position fauna of attention keeps a position 1704MPs frame 2000 and comprises affirmation position 2010 (position 33) again again.Confirm that position 2010 is " 0 ".Confirm that position 2010 can be set at " 1 " to acknowledge receipt of the CP frame (with reference to figure 24b) that the APCM modulator-demodulator sends by the DPCM modulator-demodulator.Having and confirm that the 2010 MPs frames 2000 that are set at " 1 " are with MPs " frame represents." frame all comprises the position and the information of similar number, and unique difference is to confirm the value of position 2010 for MPS frame and MPs.But, MPs and MPS " and " frame is also short than MP and MP respectively on the frame duty border.
Now, with reference to Figure 21, show the example definition position of short CP frame (CPs) 2100.As shown, as with as the CP frame 1800, CPS frame 2100 is the frame of synchronized model, and having 17 is 1 leading synchronously position 2101 (position 0:16), and one opens that beginning position 2102 (position 17) is followed in the back and finishes with 16 cRC2130 (position 35:s0).CRC position 2130 can be utilized to investigate the correctness of CPs frame 2100 by DPCM modulator-demodulator 590.Shown in and for example same, CPS frame 2100 also comprises CPs marker bit 2104 (position 18) with difference CPs frame 2100 and CP frame 1800.With reference to Figure 18, notice that corresponding position fauna keeps position 1804 again.CPs frame 2100 comprises again confirms position 2110 (position 33).Confirm that position 2110 is " 0.。Confirm that position 2110 can be set at " 1 by the APCM modulator-demodulator.To acknowledge receipt of the MP frame (with reference to figure 24b) that the DPCM modulator-demodulator sends.Having the 2110 CPS frames 2100 that are set at " 1 " of affirmation is that " frame is represented with CPs.CPs frame and CPs " frame all comprises the position and the information of similar number, and unique difference is to confirm the value of position 2110.But, should note CPs and CPs " and " frame is also short than CP and CP respectively on the frame duty border.
With reference to Figure 21, show the example definition position of short CPa frame (CPas) 2200.As shown, as being the frame of synchronized model with CPas frame 2200 as the CPa frame 1900, having 17 is 1 synchronously leading position 2201 (position 0:16), and one opens that beginning position 2202 (position 17) is followed in the back and finishes with 16 CRC223o (position 35:50).CRC position 2230 can be utilized to investigate the correctness of CPas frame 2200 by the APCM modulator-demodulator.Shown in and for example same, CPas frame 2200 also comprises CPas marker bit 2104 (position 18:20) with difference CPas frame 2200 and CPa frame 1900.With reference to Figure 19, notice that corresponding position fauna keeps position 1904 again.CPas frame 2200 comprises again confirms position 2210 (position 33).Confirm that position 2110 is " 0 ".Confirm that position 2210 can be set at " 1 by the DPCM modulator-demodulator.To acknowledge receipt of the CP frame (with reference to figure 24C) that the APCM modulator-demodulator sends.Have and confirm that 2110 are set at " 1.CPas frame 2200 be with CPas " frame represents.CPas frame and CPas " frame all comprises the position and the information of similar number, and unique difference is to confirm the value of position 2210.CPas and CPas " in fact also " frame is also short than CPa and CPa respectively for frame.
Figure 23 is that V.34 demonstration exchanges the parameter that is embedded in MP sequence or frame 2312 and 2322 respectively according to the ITU suggestion traditionally between APCM modulator-demodulator 2310 and DPCM modulator-demodulator 2320.As shown the TRN in stage 4 part 2311 and 2312 or the last training of Signal Exchange Processing after, APCM and DPCM modulator-demodulator 2310 and 2320 can exchange MP frame 2312 and 2322 respectively.MP frame 2312 and 2322 is the form shown in the MP frame 1700 of Figure 17.As shown, in the blink before APCP begins to send MP frame 2312, DPCM modulator-demodulator 2320 begins to send MP frame 2322.As a result, APCM modulator-demodulator 2310 can receive MP frame 2322 before DPCM modulator-demodulator 2320 is received MP frame 2312.In order to respond, APCM modulator-demodulator 2310 can be set the affirmation position in the MP frames, thereby produces MP " frame, and begin to send MP " frame 2314, MP " frame 2314 and comprise indivedual and each information that before send to DPCM modulator-demodulator 2320 via MP frame 2312.The affirmation of MP frame 2322 of waiting for it as DPCM when APCM modulator-demodulator 2310 is sent here, another MP frame 2322 can by DPCM modulator-demodulator 2320 be sent to APCM modulator-demodulator 2310 with provide APCM modulator-demodulator 2310 for the second time chance with reception MP frame 2322.Simultaneously APCM modulator-demodulator 2310 received a MP frame 2322 and do not receive it MP frame 2312 or its MP " affirmation of frame 2314; therefore, APCM modulator-demodulator 231o can produce the 2nd MP frame with give DPCM for the third time chance be embedded in MP or MP respectively to receive " parameter in the frame 2312 or 2314.But DPCM modulator-demodulator 2320 has begun to send MP " frame 2324 as shown.These long frames and their overlapping meeting prevent modulator-demodulator 2310 and 2320 exchange parameter apace in transmission and time of reception territory.Postpone in fact to accumulate." " transmission of frame and reception can impel a modulator-demodulator to begin to send long MP frame: still, when receiving and investigating the CRC position, the MP frame just can be identified for the MP of frame duration and MP when receiving MP from the far-end modulator-demodulator.Therefore, " modulator-demodulator of frame does not need to begin to send another long MP frame to receive MP.
With reference to figure 5, also notice long CP, CP again ", MP and MP " frame 510,512,520 and 522 be not because send wrong but only because these frames transmission and the time sequence difference of reception, exchange is many times respectively.In fact be clear that very that being similar to the V.92 mechanism of ITU suggestion will much cause longer delay than MP and CP frame length because of the CPa frame.
Therefore, at a duty Shi Lizhong of the present invention, as shown in Figure 24 a, being similar to the MP and the MP of the weak point of the MPs frame among Figure 20 respectively " frame (MPS and MPs ") 2423 and 2424 can be used to blame ground, border and reduce parameter swap time and obtain faster between modulator-demodulator and be connected.With reference to figure 24a, as with as Figure 23, modulator-demodulator 2410 and 2420 exchanges long MP frame 2412 and 2422 respectively.But after this transmission, two modulator-demodulators can switch to short MP frame format.DPCM modulator-demodulator 2420 can be right after when also just waiting for from APCM modulator-demodulator 2410 reception whole M P frames 2412 after sending MP frame 2422 as shown, begins to send MPs frame 2423.Be right after after sending MP frame 2412, " (MPS ") is to confirm receiving MP frame 2422 from DPCM modulator-demodulator 2420 for frame 2414 by sending short MP for APCM modulator-demodulator 2410.On the other hand, when sending NIPS frame 2423, DPCM modulator-demodulator 2420 can receive MP frame 2412 and " frame 2424 is to confirm this frame by sending MPs.The transmission meeting of short frame is actual to be reduced the handshaking time and causes quick connection between two modulator-demodulators 2410 and 2420.
By identical mark, the short CP among Figure 24 b and the exchange of MP frame will speed up the connect hours that meets modulator-demodulator V.90.$D with shown in be similar to the weak point of MPs frame 2000 among Figure 20 and the CPS frame 2100 among Figure 21 respectively MP, MP ", CP and CP " frame (MPS, MPS ", CPS and CPs ") 2463,2464, (not shown) and 2454 can be used for meeting modulator-demodulator V.90.Use these short frames in fact can reduce parameter swap time and cause between the modulator-demodulator faster connection.With reference to figure 24b, two modulator-demodulators 2450 and 2460 are long CP and MP frame 2452 and 2462 of exchange respectively.After the transmission of these long frames, modulator-demodulator begins to send short CP and MP picture format formula.As shown, be right after when reaching wait from APCM modulator-demodulator 2450 reception whole C P frames 2452 after sending MP frame 2462, DPCM modulator-demodulator 2460 begins to send MPs frame 2463.Being right after the CP that APCM modulator-demodulator 2450 is lacked by transmission after sending CP frame 2452 " (CPS ") is to confirm receiving MP frame 2462 from DPCM modulator-demodulator 2460 for frame 2454.On the other hand, when sending MPs frame 2463, DPCM modulator-demodulator 2460 can receive MP frames 2452 and by sending MPs " frame 2464 to be to confirm this frame.
Mainly due to the amount of information and the parameter (with reference to Figure 19) that are embedded in the CPa frame 1900, the transmission of short frame can cause and particularly meet V.92 connecting fast of modulator-demodulator.With reference to Figure 24.Be similar to respectively the weak point of CPas frame 2200 among Figure 22 and the CPs frame Z10o among Figure 21 CPa, CPas ", CP and CP " frame (CPas, CPas ", CPs and CPs ") 2493,2494, (not shown) and 2484 can be used for meeting modulator-demodulator V.92.Use these short frames in fact can reduce parameter swap time.As a result, V.92 compatible modulator-demodulator can be obtained quick connection.Can distinguish at first long cP and CPa frame 2482 and 2492 of exchange with reference to figure 24c two modulator-demodulator 248o and 249o.After the transmission of these long frames, modulator-demodulator begins to send short CP and CPa picture format formula.As shown, be right after when reaching wait from APCM modulator-demodulator 2480 reception whole C P frames 2482 after sending CPa frame 2492, DPCM modulator-demodulator 2490 begins to send CPas frame 2493.Be right after after sending CP frame 2482, APCM modulator-demodulator 2480 is by sending short CP " (CPs ") is to confirm receiving CPa frame 2492 from DPCM modulator-demodulator 2490 for frame 2484.On the other hand, when sending CPas frame 2493, DPCM modulator-demodulator 2490 can receive CP frames 2482 and by sending CPas " frame 2494 to be to confirm this frame.
Figure 25 a, 25b and 25c system shows the example of some situations that long frame MP, CP and/or CPa are not suitably received by receiving modem.With reference to figure 25a, according to one embodiment of the invention, APCM and DPCM modulator-demodulator 2510 and 2520 exchange the embodiment of some situations of MP frame 2512 and 2522 respectively.Be right after after the transmission of long MP frame 2512 and 2522, two modulator-demodulators 2510 and 2520 can switch to the transmission of short MP frame 2513 and 2523 respectively.As shown, DPCM modulator-demodulator 2520 can suitably receive MP frame 2512.Therefore, in order to respond, DPCM modulator-demodulator 2520 can " frame 2524 be confirmed MP frame 2slZ with MPs.But on the other hand, APCM2510 can't receive MP frame 2522.This failure system leads because of in such as bad transmission, bad line conditions, the different reasons such as CRC of mistake.The result of this failure is that APCM modulator-demodulator 2510 continues to send the MPS frame 2513 with the affirmation that is set at " 0 ", and the affirmation that is set at " 0 " means that MP frame 2522 is not received.In these cases, according to one embodiment of the invention, DPCM modulator-demodulator 2520 begins to send long MP frame once again.Because DPCM modulator-demodulator 2520 has been received MP frame 2512, so the new long MP frame 2525 that is sent by DPCM modulator-demodulator 2520 will make their affirmation position be set at " 1 ".In other words, because short frame does not comprise the parameter of all needs, so DPCM modulator-demodulator 2520 begins to send MP " frame.In certain embodiments, DPCM modulator-demodulator 2520 can only send a MP " frame 2525 then switches to and sends MPs " frame 2524 (Figure 25 b for instance)
When beginning to resend long MP frame after the period of the short MP frame of decision transmission, DPCM modulator-demodulator 2520 can use different situation incident or method.In one embodiment, if after modulator-demodulator 2520 or 2510 is finished its long MP frame transmission, the MP more than DPCM modulator-demodulator 2520 or 2510 receptions of APCM modulator-demodulator postpone back and forth or the beginning of MPs frame, then modulator-demodulator 2520 or 2510 can begin to send once again long MP frame.In another embodiment before long MP frame sends once again, postpone to allow to detect time of delay such as adding to back and forth extra time of 20-30ms.Practise in this general skill person and know the calculating that postpones back and forth.At some duty Shi Lizhong, ask in the time of can using the quantitative time as time-out in the time of after the decision modulator-demodulator is being sent short MP frame, when should sending long MP frame once again.In another embodiment again, can utilize scheduled event, for instance, the number of the short MP frame that sends by the modulator-demodulator of positive wait acknowledge.For instance,, but do not receive when confirming that then APCM modulator-demodulator 2510 can send another MP frame if APCM modulator-demodulator 2510 sends three MPS frames.
Now, with reference to 222 Figure 25 b, another duty according to the present invention executes routine APCM and DPCM modulator-demodulator 2520 and 2560 can exchange CP and MP frame 2552 and 2562 respectively.Be right after long that [2 and after MP frame 2552 and 2562 sends, two modulator-demodulators 2550 and 2560 can switch to short CP (CPs) and short MP (MPs) frame 2553 and 2563 transmission respectively.As shown, DPCM modulator-demodulator 2560 can suitably receive CP frame 2552.Therefore, in order to respond, DPCM modulator-demodulator 2560 can " frame 2564 be confirmed CP frame 2552 with MPS.But on the other hand, APCM2550 can't receive MP frame 2562.Therefore, 2550 continuation of APCM modulator-demodulator send to have and confirm to be set at F0.CPS frame 2553, confirm that be set at " 0 " means that MP frame 2562 is not received as yet.As shown, DPCM modulator-demodulator 2560 stop to send MPs " frame 2564 and only send and have and confirm that the position is set the MP of the length of (because CP is received), that is MP ".In certain embodiments, DPCM modulator-demodulator 2560 can continue to send more MP " frame.But, in the embodiment of circle 25b, only sending a MP " after the frame, DPCM modulator-demodulator 2560 begins to send MPS " frame 2564.Simultaneously, " frame 2564 is so APCM modulator-demodulator 2550 continues to send short CP frame 2553 owing to its MPS that receives the conduct affirmation.At last, APCM modulator-demodulator 2550 receives long MP frame 2565 and modulator-demodulator from DPCM modulator-demodulator 2560 and moves to data phase.As utilizing such as above-mentioned distinct methods or predetermined state when send long frame afterwards by APCM or DPCM modulator-demodulator 2550 or 2560 with the short frame of decision transmission with reference to figure 25a is described.
Figure 25.System shows one embodiment of the invention, and it can incorporate into or cooperate the ITU suggestion V.92 to use.According to Figure 25 C, APCM and DPCM modulator-demodulator 2580 and 2590 can exchange CP and CPa frame 2582 and 2592 respectively.Be right after after the transmission of long CP and CPa frame 2582 and 2592, two modulator-demodulators 2580 and 2590 can begin to send short CP (CPs) and short CPa (CPas) frame 2583 and 2593 respectively.As shown, DPCM modulator-demodulator 2590 can suitably receive CP frame 2582 in order to respond, and DPCM modulator-demodulator 2590 can " frame 2594 be confirmed CP frame 2582 with CPas.But on the other hand, APCM2580 can't receive CPa frame 2592.Therefore 2580 continuation of APCM modulator-demodulator send to have and confirm to be set at " 0.CPs frame 2583, confirm to be set at F0 " mean that the CPa2592 frame is not received as yet.As shown, DPCM modulator-demodulator 2590 stops to send CPas " frame 2594 and replacement ground begin transmission and has the CPa frame 2595 that the affirmation position is set the length of (being received because of CP), that is CPa ".As shown, in the present embodiment, DPCM modulator-demodulator 2590 can send the CPa frame more than.But a CPa " can be sent out and DPCM modulator-demodulator 2590 can switch back to send CPas " is only arranged in other embodiments.Simultaneously, because it receives the CPas as affirmation " frame 2594, so APCM modulator-demodulator 2580 continues to send short CP frame 2583.At last, APCM modulator-demodulator 2580 receives long CPa frame 2595 and modulator-demodulator from DPCM modulator-demodulator 2590 and moves to data phase.This is in decision and sends when when resending long frame after the short frame, can utilize as mentioned above trigger event or situation.
Figure 26 is the demonstration another embodiment of the present invention, in fact can reach rate consulation between the modulator-demodulator quickly according to present embodiment.Figure 26 is that the speed between demonstration APCM modulator-demodulator 2610 and the DPCM modulator-demodulator 2620 is consulted the exchange processing again.As shown, start the employed similar parameters exchange of training period processing at modulator-demodulator and can be used for exchanging MP, CP and CPa.The duty of Figure 26 is executed the demonstration of example system and is handled through consultation according to ITU suggestion speed V.90 again.But identical idea can be applied to V.34 to reach V.92 and consult.Figure 26 is that demonstration is consulted by 2610 speed that open of APCM modulator-demodulator again.As shown, modulator-demodulator 2610 and 2620 exchanges long CP and MP frame 2612 and 2622 respectively.Afterwards, modulator-demodulator 2610 and 2612 begins to send short CP (CPs) and short MP (MPs) frame 2613 and 2623 respectively.At first to receive MP frame 2622 according to present embodiment IAPCM modulator-demodulator 2610, and in order responding, when confirming, can to send CPS " frame 2614 gives DPCM modulator-demodulator 2620.On the other hand, DPCM modulator-demodulator 2620 can receive CP frame 2612 and can send MPs " frame 2623 when confirming.In this stage, two modulator-demodulators 2610 and 2620 can continue to data phase apace.Because send the short CP and the result of MP frame, modulator-demodulator 2610 and 2620 can be finished speed more apace and consult.
Figure 27 system is in order to improve the another embodiment of the present invention of quick training speed.Figure 27 is the quick training managing that shows between APCM modulator-demodulator 2710 and the DPCM modulator-demodulator 2720.During quick training managing, the parameter exchange also is used in exchange MP, CP and CPa.The embodiment of Figure 27 is that demonstration is according to ITU suggestion quick training managing V.90.But it also can be applied to and V.34 reach V.92 training fast.Figure 27 is the quick training managing that demonstration is started by APCM modulator-demodulator 2710.As shown, CP and MP frame 2712 and 2722 of modulator-demodulator 2710 and 2720 exchange length respectively.And then, two modulator-demodulators 2710 and 2712 begin to send short CP (CPs) and short MP (MPs) frame 2713 and 2723 respectively.For MP frame 2722 is received in response, APCM modulator-demodulator 2710 can send CPS " frame 2714 gives DPCM modulator-demodulator 2720 to acknowledge receipt of.On the other hand, DPCM modulator-demodulator 2720 can receive CP frame 2712 and send MPs " frame 2724 when confirming.After the fast parameter exchange of success, modulator-demodulator 2710 and 2720 continues to data phase.Owing to send the short CP and the result of MP frame, can and obtain quick training more efficiently with the less time.
Figure 28 shows short parameter frame of the present invention and combines such as other different viewpoints of the present invention such as quick connection processing.Figure 28 is the quick connection processing of demonstration according to a viewpoint of the present invention.As shown, quick connection processing comprises the use of the present invention's weak point CP and MP frame.Figure 28 is the quick connection processing that shows between APCM modulator-demodulator 2810 and the DPCM modulator-demodulator 2820.During connecting fast, depend on the data standard that is used for exchange, MP, CP and CPa frame can exchange between modulator-demodulator.The embodiment of Figure 28 is that demonstration is according to ITU suggestion connection fast V.90.But identical exchange can be applied to V.34 to reach and V.92 connect design fast.As shown, CP and MP frame 2812 and 2822 of modulator-demodulator 2810 and 2820 exchange length respectively.And then, modulator-demodulator 2810 and 2812 begins to send short CP (CPs) and short MP (MPs) frame 2813 and 2823 respectively.For MP frame 2822 is received in response, APCM modulator-demodulator 2810 can send CPS, and " frame 2814 gives DPCM modulator-demodulator 2820 to confirm this reception.On the other hand, DPCM modulator-demodulator 2820 can receive CP frame 2812 and send MPs when confirming " frame 2824.After the fast parameter exchange of success, modulator-demodulator 2710 and 2720 continues to data phase.As a result, can reduce more by adopting between two modulator-demodulators fast parameter to exchange the quick connect hours of the present invention.
When with software implementation, at least some elements of the present invention can be the form of computer data, comprise but be not limited to any information, sign indicating number, or the like.Data can dispose and can be stored in the medium that processor can read in the mode of hyte or data segments or be sent by the data-signal that is embedded in the carrier wave on transmitting medium or communication link.For instance, position information in the CPa frame can form by the different data segments communication link that is embedded in the data-signal transmission in the carrier wave including but not limited to telephone wire, modulator-demodulator connection, Internet connection, networking (ISDN) connections of integrated service numeral, asynchronous transmission mode (ATM) connections, frame delay connections, Etherloop connections, coaxial connection, optical fiber connect, satellite connects (digital satellite services or the like for instance), wireless connections, radio frequency (RF) chains, electromagnetism chains, the bi-directional call connection, or the like and make up." processor readable media.Comprise and to store or any medium of transmission information.The embodiment of processor readable media comprises electronic circuit, semiconductor memory system, ROM, flash memory, can smear wipe away ROM (EROM), disk, CD-ROM, laser disc, hard disc, fiber medium, radio frequency (RF) link, or the like.Computer data signal comprise any can such as electronics networking channel, optical fiber air, electromagnetism, RF link, etc. the signal propagated on the transmission medium.Can be via such as download area segment encodes such as computer networking such as the Internet, inner networkings.
In above-mentioned, execute example explanation the present invention with reference to preferable duty.But, practise understanding and under not departing from scope of the present invention, can change and revise preferred embodiment in this skill person.These and other change or revise system and be contained in the described scope of the present invention of claim as described later.

Claims (81)

1. one kind is used for first modulator-demodulator and second modem and trains to reduce between described first modulator-demodulator and the described second modem method of training time between the training parameter commutation period, it is characterized in that described training method comprises the steps:
Send the first information sequence with first length and first definition by described first modulator-demodulator to described second modem, described first information sequence comprises a plurality of first training parameters;
Receive second information sequence with second length and second definition by described first modulator-demodulator from described second modem, described second information sequence comprises a plurality of second training parameters;
Send the 3rd information sequence to described second modem by described first modulator-demodulator with the 3rd length and the 3rd definition; And
Receive the 4th information sequence by described first modulator-demodulator from described second modem with the 4th length and the 4th definition,
Wherein, described the 3rd definition comprises that one the 3rd confirms designator, described the 4th definition comprises that then one the 4th confirms designator, wherein, described the 3rd affirmation designator is received described second information sequence by the described first modulator-demodulator adjustment with indication, the described the 4th confirm designator then by the described first modulator-demodulator inspection to judge whether described second modem received described first information sequence, wherein, described the 3rd length is less than described first length, described the 4th length is then less than described second length, and described training method also comprises:
Repeat to send described the 3rd information sequence and continue the scheduled time, indicate described second modem to receive described first information sequence up to described the 4th affirmation designator; And
If described the 4th affirmation designator indicates described second modem not receive described first information sequence, then send described first information sequence then in the described scheduled time.
2. the method for claim 1 is characterized in that, described first definition is identical with described second definition, and described the 3rd definition is then identical with described the 4th definition.
3. the method for claim 1 is characterized in that, described first length is identical with described second length, and described the 3rd length is then identical with described the 4th length.
4. the method for claim 1 is characterized in that, the described first and the 3rd information sequence all comprises the pattern part, and wherein said pattern partly distinguishes described first and described the 3rd information sequence.
5. the method for claim 1 is characterized in that, described first information sequence is a MP frame, and described the 3rd information sequence is a MPs frame.
6. method as claimed in claim 5 is characterized in that, described second information sequence is a MP frame, and described the 4th information sequence is a MPs frame.
7. method as claimed in claim 5 is characterized in that, described second information sequence is a CP frame, and described the 4th information sequence is a CPs frame.
8. the method for claim 1 is characterized in that, described first information sequence is a CP frame, and described the 3rd information sequence is a CPs frame.
9. method as claimed in claim 8 is characterized in that, described second information sequence is a CPa frame, and described the 4th information sequence is a CPas frame.
10. the method for claim 1 is characterized in that, utilizes the part of described method as quick training signal exchange between the described modulator-demodulator.
11. the method for claim 1 is characterized in that, utilizes described method as a part that connects handshaking between the described modulator-demodulator fast.
12. the method for claim 1 is characterized in that, utilizes described method as the part of negotiation signal exchange again of speed between the described modulator-demodulator.
13. the method for claim 1 is characterized in that, utilizes the part of described method as enabling signal exchange between the described modulator-demodulator.
14. one kind is used for first modulator-demodulator and second modem and trains to reduce between described first modulator-demodulator and the described second modem method of training time between the training parameter commutation period, it is characterized in that described training method comprises the steps:
Send the long letter breath sequence with first and second information definition portions from described first modulator-demodulator to described second modem, the described second information definition portion comprises a plurality of training parameters; And
Have the short message sequence of described first information definition part from described first modulator-demodulator to described second modem transmission,
Wherein, described first information definition part comprises the pattern part of distinguishing described first and second information sequences, described first information definition part comprises that also one confirms designator, described affirmation designator can be used for being confirmed to receive information sequence from described second modem by described first modulator-demodulator, and described training method also comprises:
Repeat to send described short message sequence and continue the scheduled time, up to indicate described second modem to receive described long letter breath sequence from the affirmation of described second modem; And
If do not receive described affirmation, then send described long letter breath sequence then in the described scheduled time from described second modem.
15. method as claimed in claim 14 is characterized in that, described long letter breath sequence is a MP frame, and described short message sequence is a MPs.
16. method as claimed in claim 14 is characterized in that, described long letter breath sequence is a CP frame, and described short message sequence is a CPs.
17. method as claimed in claim 14 is characterized in that, described long letter breath sequence is a CPa frame, and described short message sequence is a CPas.
18. one kind is used for first modulator-demodulator and second modem and trains to reduce between described first modulator-demodulator and the described second modem method of training time between the training parameter commutation period, it is characterized in that described training method comprises the steps:
Receive the long letter breath sequence with first and second information definition portions by described first modulator-demodulator from described second modem, the described second information definition portion comprises a plurality of training parameters; And
Have the short message sequence of described first information definition part by described first modulator-demodulator from described second modem reception,
Wherein, described first information definition part comprises the pattern part of distinguishing described first and second information sequences, described first information definition part comprises that also one confirms designator, described affirmation designator can be used for definite described second modem and receive the information sequence that is sent, and described training method also comprises:
Repeat to receive described short message sequence and continue the scheduled time, up to receive described long letter breath sequence from the affirmation indication of described first modulator-demodulator; And
If described second modem is not received described affirmation, then receive described long letter breath sequence then in the described scheduled time.
19. method as claimed in claim 18 is characterized in that, described long letter breath sequence is a MP frame, and described short message sequence is a MPs.
20. method as claimed in claim 18 is characterized in that, described long letter breath sequence is a CP frame, and described short message sequence is a CPs.
21. method as claimed in claim 18 is characterized in that, described long letter breath sequence is a CPa frame, and described short message sequence is a CPas.
22. a modulator-demodulator is configured to reduce the training time when carrying out the training parameter exchange with the second modem training period, it is characterized in that described first modulator-demodulator comprises:
One receiver, can from described second modem receive its back follow have second length and second the definition second information sequence, have first length and first the definition first information sequence, described first information sequence comprises a plurality of first training datas; And
One transmitter can send its back to described second modem and follow the 3rd information sequence the 4th information sequence, that have the 3rd length and the 3rd definition with the 4th length and the 4th definition,
Wherein, each described definition comprises that one confirms designator, wherein, the described affirmation designator that described transmitter is configured to adjust described the 4th information sequence is to receive described first information sequence when the indication when described second modem receives described first information sequence of described receiver, wherein, described receiver is configured to check that the described affirmation designator of described second information sequence receives described the 3rd information sequence to determine described second modem from described transmitter, wherein, described second length is less than described first length, described the 4th length is then less than described the 3rd length, and
Wherein said transmitter also is configured to repeat to send described the 4th information sequence and continues the scheduled time, indicate described second modem to receive described the 3rd information sequence up to the described second affirmation designator, if and be configured to described second and confirm that designator do not indicate described second modem to receive described the 3rd information sequence, then send described the 3rd information sequence then in the described scheduled time.
23. first modulator-demodulator as claimed in claim 22 is characterized in that, described first length is identical with described the 3rd length, and described second length is then identical with described the 4th length.
24. first modulator-demodulator as claimed in claim 22 is characterized in that, described first definition is identical with described the 3rd definition, and described second definition is identical with described the 4th definition.
25. first modulator-demodulator as claimed in claim 22 is characterized in that, described receiver receives the 5th information sequence with the 5th length and the 5th definition in the given time.
26. first modulator-demodulator as claimed in claim 25 is characterized in that, described the 5th length equals described second length, and described the 5th definition is identical with described second definition.
27. first modulator-demodulator as claimed in claim 25 is characterized in that, described the 5th definition comprises the affirmation designator that described the 3rd information sequence is received in an expression.
28. first modulator-demodulator as claimed in claim 27 is characterized in that, described the 5th information sequence is a MPs '.
29. first modulator-demodulator as claimed in claim 27 is characterized in that, described the 5th information sequence is a CPs '.
30. first modulator-demodulator as claimed in claim 27 is characterized in that, described the 5th information sequence is a CPas '.
31. first modulator-demodulator as claimed in claim 22 is characterized in that, described receiver fails to receive in the given time the affirmation to described the 3rd information sequence, and described transmitter then sends the 5th information sequence with the 5th length and the 5th definition.
32. first modulator-demodulator as claimed in claim 31 is characterized in that, described the 5th length equals described the 3rd length, and described the 5th definition is identical with described the 3rd definition.
33. first modulator-demodulator as claimed in claim 31 is characterized in that, described transmitter also sends the 6th information sequence with described the 4th length and described the 4th definition.
34. first modulator-demodulator as claimed in claim 31 is characterized in that, described transmitter also sends the 6th information sequence with described the 3rd length and described the 3rd definition.
35. first modulator-demodulator as claimed in claim 22 is characterized in that, described the 3rd information sequence is a MP.
36. first modulator-demodulator as claimed in claim 22 is characterized in that, described the 4th information sequence is a MPs.
37. first modulator-demodulator as claimed in claim 22 is characterized in that, described the 3rd information sequence is a CP.
38. first modulator-demodulator as claimed in claim 22 is characterized in that, described the 4th information sequence is a CPs.
39. first modulator-demodulator as claimed in claim 22 is characterized in that, described the 3rd information sequence is a CPa.
40. first modulator-demodulator as claimed in claim 22 is characterized in that, described the 4th information sequence is a CPas.
41. first modulator-demodulator as claimed in claim 22, it is characterized in that, described receiver fails to receive the affirmation to described the 3rd information sequence in scheduled event or situation, described transmitter then sends the 5th information sequence with the 5th length and the 5th definition.
42. a modulator-demodulator is configured to reduce the training time when carrying out the training parameter exchange with the second modem training period, it is characterized in that described first modulator-demodulator comprises:
One transmitter;
One receiver, can from described second modem receive its back follow have second length and second the definition second information sequence, have first length and first the definition first information sequence, described first information sequence comprises a plurality of first training parameters
Wherein, described first length is longer than described second length, each described definition comprises that one confirms designator, wherein, each described affirmation designator can be received the information sequence that is sent through checking with definite described second modem, and the wherein said information sequence that sends is sent by described transmitter;
Wherein said receiver is configured to repeat to receive described second information sequence and continues the scheduled time, send an affirmation indication up to described first modulator-demodulator and receive described first information sequence, if and be configured to described first modulator-demodulator and do not send described affirmation, then receive described first information sequence then in the described scheduled time.
43. first modulator-demodulator as claimed in claim 42 is characterized in that:
Described transmitter also is configured to send its back and follows the 3rd information sequence the 4th information sequence, that have the 3rd length and the 3rd definition with the 4th length and the 4th definition,
Wherein said the 3rd length is longer than described the 4th length.
44. first modulator-demodulator as claimed in claim 42 is characterized in that, described first information sequence is a CPa, and described second information sequence is a CPas.
45. first modulator-demodulator as claimed in claim 42 is characterized in that, described first information sequence is a CPas, and described second information sequence is a CPa.
46. one kind is used to reduce the method for carrying out the relevant training time of training parameter exchange with second modem by first modulator-demodulator, it is characterized in that described training method comprises the steps:
Send first frame to described second modem, described first frame comprises a plurality of first training parameters;
After the step of described transmission first frame, send one or more second frames to described second modem, described second frame lacks described a plurality of first training parameter and is shorter than described first frame;
Receive an affirmation from described second modem and receive described first frame to confirm described second modem;
If not sending one to described second modem, described first modulator-demodulator confirms then after the step of described confirmation of receipt, to continue the step of one or more second frames of described transmission to indicate described first modulator-demodulator to receive a plurality of second training parameters from described second modem.
47. method as claimed in claim 46 is characterized in that, described a plurality of first training parameters comprise modulation parameter.
48. method as claimed in claim 46 is characterized in that, described a plurality of first training parameters comprise constellation parameter.
49. method as claimed in claim 46 is characterized in that, and is described further comprising the steps of:
Receive the 3rd frame from described second modem, described the 3rd frame comprises a plurality of second training parameters; And
After the step of described reception the 3rd frame, receive one or more the 4th frames from described second modem, described the 4th frame lacks described a plurality of first training parameter and is shorter than described the 3rd frame.
50. method as claimed in claim 49 is characterized in that, the step of described confirmation of receipt comprises that reception has described one or more the 4th frames of an affirmation designator, and described affirmation designator indicates described second modem to receive described first frame.
51. method as claimed in claim 49 is characterized in that, comprises that also sending one to described second modem confirms to confirm receiving described the 3rd frame from described second modem.
52. method as claimed in claim 46 is characterized in that, each of described first frame, second frame, the 3rd frame and the 4th frame comprises that all one confirms indicator field.
53. one kind is used to reduce the method for carrying out the relevant training time of training parameter exchange with second modem by first modulator-demodulator, it is characterized in that described training method comprises the steps:
Receive first frame from described second modem, described first frame comprises a plurality of first training parameters;
After the step of described reception first frame, receive one or more second frames from described second modem, described second frame lacks described a plurality of first training parameter and is shorter than described first frame;
Send an affirmation to described second modem and receive described first frame to confirm described first modulator-demodulator;
Confirm to indicate described second modem to receive a plurality of second training parameters if described first modulator-demodulator does not receive one from described second modem, then after the step that described transmission is confirmed, continue the step of one or more second frames of described reception from described first modulator-demodulator.
54. method as claimed in claim 53 is characterized in that, described a plurality of first training parameters comprise modulation parameter.
55. method as claimed in claim 53 is characterized in that, described a plurality of first training parameters comprise constellation parameter.
56. method as claimed in claim 53 is characterized in that, and is described further comprising the steps of:
Send the 3rd frame to described second modem, described the 3rd frame comprises a plurality of second training parameters; And
After the step of described transmission the 3rd frame, send one or more the 4th frames to described second modem, described the 4th frame lacks described a plurality of first training parameter and is shorter than described the 3rd frame.
57. method as claimed in claim 56 is characterized in that, the step that described transmission is confirmed comprises that transmission has described one or more the 4th frames of an affirmation designator, and described affirmation designator indicates described second modem to receive described first frame.
58. method as claimed in claim 56 is characterized in that, comprises that also receiving one from described second modem confirms to confirm receiving described the 3rd frame from described first modulator-demodulator.
59. method as claimed in claim 56 is characterized in that, each of described first frame, second frame, the 3rd frame and the 4th frame comprises that all one confirms indicator field.
60. a modulator-demodulator is configured to reduce the relevant training time of carrying out the training parameter exchange with second modem, it is characterized in that described first modulator-demodulator comprises:
Transmitter, be configured to send first frame to described second modem, described first frame comprises a plurality of first training parameters, described transmitter also is configured to send one or more second frames to described second modem after sending described first frame, and described second frame lacks described a plurality of first training parameter and is shorter than described first frame;
Receiver is configured to receive an affirmation from described second modem and receives described first frame to confirm described second modem;
Wherein, confirm to indicate described receiver to receive a plurality of second training parameters if described transmitter also is configured to not send one to described second modem, then after described receiver confirmation of receipt, continue to send one or more described second frames from described second modem.
61. first modulator-demodulator as claimed in claim 60 is characterized in that, described a plurality of first training parameters comprise modulation parameter.
62. first modulator-demodulator as claimed in claim 60 is characterized in that, described a plurality of first training parameters comprise constellation parameter.
63. first modulator-demodulator as claimed in claim 60, it is characterized in that, described receiver also is configured to receive the 3rd frame from described second modem, described the 3rd frame comprises a plurality of second training parameters, and described receiver also is configured to receive one or more the 4th frames from described second modem after receiving the 3rd frame, and described the 4th frame lacks described a plurality of first training parameter and is shorter than described the 3rd frame.
64. first modulator-demodulator as claimed in claim 60, it is characterized in that, described receiver confirmation of receipt comprises that reception has described one or more the 4th frames of an affirmation designator, and described affirmation designator indicates described second modem to receive described first frame.
65., it is characterized in that described transmitter also is configured to send one to described second modem and confirms to confirm receiving described the 3rd frame from described second modem as described first modulator-demodulator of claim 64.
66., it is characterized in that each of described first frame, second frame, the 3rd frame and the 4th frame comprises that all one confirms indicator field as the described method of claim 64.
67. a modulator-demodulator is configured to reduce the relevant training time of carrying out the training parameter exchange with second modem, it is characterized in that described first modulator-demodulator comprises:
Receiver, be configured to receive first frame from described second modem, described first frame comprises a plurality of first training parameters, described receiver is configured to also that described second modem receives one or more second frames after receiving first frame, and described second frame lacks described a plurality of first training parameter and is shorter than described first frame;
Transmitter is configured to send an affirmation to described second modem and receives described first frame to confirm described first modulator-demodulator;
Wherein, if also being configured to not receive one from described second modem, described receiver confirms then after described transmitter sends affirmation, to continue one or more described second frames of described reception to indicate described second modem to receive a plurality of second training parameters from described transmitter.
68., it is characterized in that described a plurality of first training parameters comprise modulation parameter as described first modulator-demodulator of claim 67.
69., it is characterized in that described a plurality of first training parameters comprise constellation parameter as described first modulator-demodulator of claim 67.
70. as described first modulator-demodulator of claim 67, it is characterized in that, described transmitter also is configured to send the 3rd frame to described second modem, described the 3rd frame comprises a plurality of second training parameters, and described transmitter also is configured to send one or more the 4th frames to described second modem after sending the 3rd frame, and described the 4th frame lacks described a plurality of first training parameter and is shorter than described the 3rd frame.
71. as described first modulator-demodulator of claim 70, it is characterized in that, described transmitter sends confirms to comprise that transmission has described one or more the 4th frames of an affirmation designator, and described affirmation designator indicates described second modem to receive described first frame.
72., it is characterized in that described receiver also is configured to receive one from described second modem and confirms to confirm receiving described the 3rd frame from described first modulator-demodulator as described first modulator-demodulator of claim 70.
73., it is characterized in that each of described first frame, second frame, the 3rd frame and the 4th frame comprises that all one confirms indicator field as described first modulator-demodulator of claim 67.
74. one kind is used for first modulator-demodulator and second modem and trains to reduce between described first modulator-demodulator and the described second modem method of training time between the training parameter commutation period, described training method comprises the steps:
Transmission comprises the long letter breath sequence of a plurality of training parameters;
After the step of described transmission long letter breath sequence, repeat to send a plurality of short message sequences and continue the scheduled time, confirm to indicate described second modem to receive described long letter breath sequence up to receive one from described second modem; And
If do not receive described affirmation from described second modem, then after the described step that repeats to send a plurality of short message sequences and the described scheduled time then after, resend described long letter breath sequence.
75., it is characterized in that each of described long letter breath sequence and described short message sequence comprises a pattern part as the described method of claim 74, and wherein said pattern part comes described long letter breath sequence and the difference of described short message sequence.
76., it is characterized in that described long letter breath sequence is the MP frame as the described method of claim 74, described short message sequence is the MPs frame.
77. as the described method of claim 74, it is characterized in that, also comprise from described second modem receiving the long letter breath sequence that comprises described affirmation.
78. as the described method of claim 74, it is characterized in that, also comprise from described second modem receiving the short message sequence that comprises described affirmation.
79., it is characterized in that described long letter breath sequence is the CP frame as the described method of claim 74, described short message sequence is the CPs frame.
80., it is characterized in that described long letter breath sequence is CP Ah frame as the described method of claim 74, described short message sequence is the CPas frame.
81. as the described method of claim 74, it is characterized in that, utilize the part of described method as quick training signal exchange between described first modulator-demodulator and the described second modem.
CN 01117361 2000-04-24 2001-04-24 Fast connection parameter exchange Expired - Fee Related CN1242598C (en)

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