Classifications

• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
  • H04L25/00—Baseband systems
  • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
  • H04L25/14—Channel dividing arrangements, i.e. in which a single bit stream is divided between several baseband channels and reassembled at the receiver
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q11/00—Selecting arrangements for multiplex systems
  • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q11/00—Selecting arrangements for multiplex systems
  • H04Q11/04—Selecting arrangements for multiplex systems for time-division multiplexing
  • H04Q11/0428—Integrated services digital network, i.e. systems for transmission of different types of digitised signals, e.g. speech, data, telecentral, television signals
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
  • H04Q2213/13031—Pulse code modulation, PCM
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
  • H04Q2213/13036—Serial/parallel conversion, parallel bit transmission
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
  • H04Q2213/1309—Apparatus individually associated with a subscriber line, line circuits
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
  • H04Q2213/13094—Range extender
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
  • H04Q2213/13106—Microprocessor, CPU
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
  • H04Q2213/13174—Data transmission, file transfer
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
  • H04Q2213/13176—Common channel signaling, CCS7
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
  • H04Q2213/13191—Repeater
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
  • H04Q2213/13196—Connection circuit/link/trunk/junction, bridge, router, gateway
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
  • H04Q2213/13202—Network termination [NT]
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
  • H04Q2213/13203—Exchange termination [ET]
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
  • H04Q2213/13209—ISDN
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
  • H04Q2213/13216—Code signals, frame structure
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
  • H04Q2213/13292—Time division multiplexing, TDM
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
  • H04Q2213/13322—Integrated circuits
• • H—ELECTRICITY
  • H04—ELECTRIC COMMUNICATION TECHNIQUE
  • H04Q—SELECTING
  • H04Q2213/00—Indexing scheme relating to selecting arrangements in general and for multiplex systems
  • H04Q2213/13396—Signaling in general, in-band signalling

Definitions

• the present invention relates to a method according to the preamble of claim 1, i.e. a method for transmitting data between a transmitting station and a receiving station assigned to it, the data to be transmitted being supplied sequentially in the transmitting station, each containing data frames comprising a predetermined amount of data.
• Such a method is known, for example, from the ISDN area, with the transmitting station, for example
• NT network termination
• LTdine termination LTdine termination
• the data to be transmitted by the transmitting station are contained in data frames each comprising a predetermined amount of data, which are supplied to the transmitting station.
• the transmitting station extracts the data to be forwarded to the receiving station and transmits them (possibly together with newly added control data) to the receiving station via the U-interface.
• the transmission range is limited; With the techniques and methods currently used in ISDN systems, ie with the transmitting and receiving stations currently used, data transmission method, data transmission rates and transmission route types (cable types) etc., the range is approximately 5.5 km.
• one or more intermediate data regenerations and amplifications are required. This can be done, for example, by so-called repeater units, which are provided along the transmission path.
• the present invention is therefore based on the object of developing the method according to the preamble of claim 1 in such a way that the use of repeaters can be dispensed with in whole or in part.
• the data of the data frames supplied to the transmitting station are each mixed with the data from previously or subsequently supplied data frames and distributed over several newly generated data frames, which are essentially transmitted simultaneously by several transmitting devices over several transmission links.
• the generation of several new data frames from the original data frames sequentially supplied to the transmitting station and their simultaneous transmission by several transmitting stations connected in parallel over several parallel transmission links enables a reduction in the data transmission rate on the individual transmission links.
• the concomitant narrowing of the transmission spectrum enables it in turn should be placed in a frequency range, the use of which for data transmission results in a comparatively low attenuation of the data to be transmitted or of the signals corresponding to them.
• the reduced attenuation of the data to be transmitted on the transmission link has, among other things, the positive effect that the transmission range increases.
• the generation of new data frames each by combining the same from data from a plurality of original data frames also enables data to be treated identically or similarly in the respective data frames, as a result of which these are recognized in the receiving station or the assigned receiving device of the receiving station are easier to process and more tolerant.
• FIG. 1 shows a first exemplary embodiment of a device suitable for carrying out the method according to the invention
• FIG. 2 shows a schematic representation of the content (format) of a data frame entered in a transmitting station according to FIG. 1,
• FIG. 3 shows a schematic illustration to explain the generation of new data frames from data frames according to FIG. 2 entered into the transmitting station according to FIG. 1, and
• FIG. 4 shows a second exemplary embodiment of a device suitable for carrying out the method according to the invention.
• the transmission system shown schematically in FIG. 1 as a block diagram is part of an ISDN system and comprises a transmitting station 1, a receiving station 2 and a transmission path 3.
• the transmission station 1 is part of an NT unit of the ISDN system and comprises a first transmission device 11, a second transmission device 12, a data frame conversion unit 13 and a control unit 14.
• the receiving station 2 is part of an LT unit of the ISDN system and comprises a first receiving device 21, a second receiving device 22, a data frame conversion unit 23 and a control unit 24.
• the transmission link 3 comprises two line pairs 31 and 32 and is the practical realization of a U-interface (U-interface) of the ISDN system connecting the NT unit and the LT unit.
• U-interface U-interface
• Both the transmitting devices 11 and 12 and the receiving devices 21 and 22 are designed as transmitting / receiving units (transceivers) with corresponding external circuitry, so that the transmitting devices 11 and 12 also as receiving devices and the receiving devices 21 and 22 also as transmitting devices can serve and thus enable bidirectional communication.
• the transmitting devices 11 and 12 and the receiving devices 21 and 22 are each implemented in the present exemplary embodiment by the Siemens component PEB 2091 IEC-Q v4.x with corresponding external wiring.
• the data frame conversion units 13 and 23 are each implemented by two Siemens components PEB 2054 EPIC-S.
• control units 14 and 24 are implemented by microprocessors, microcontrollers or the like.
• the data to be transmitted via the transmission link 3 are contained in data frames which are fed to the data frame conversion unit 13 sequentially via an input connection E. These data frames are referred to as IOM-2 data frames because they are supplied to the data frame conversion unit via a so-called IOM-2 interface or an IOM-2 interface.
• IOM-2 interface or the IOM-2 interface and the IOM-2 data frames that can be transmitted via it comes from the applicant and is well known in the art.
• IOM interface or IOM-2 interface (s) are referred to below as IOM interface (s) or IOM interface (s)
• IOM-2 data frames are briefly referred to as IOM data frames.
• an IOM data frame is 32 bits long, which is composed of the (useful) data and control data for the transmission devices 11 and 12 to be transmitted via the transmission path 3.
• the content or format of such an IOM data frame is illustrated in FIG. 2. Accordingly, an IOM data frame consists of 8 bit BL data, 8 bit B2 data, 8 bit monitor data, 2 bit D data, 4 bit C / I data, 1 bit MR data and 1 bit MX data .
• the useful data to be transmitted by the transmitting devices 11 and 12 together with additional control data for the receiving devices 21 and 22 are the BI, B2 and D data; the monitor, C / I, MR and MX data are control data for controlling the transmission devices 11 and 12.
• the data frame conversion unit 13 has control connections via which it can be controlled by the control unit 14.
• the control unit 14 controls the data frame conversion unit 13 in the present exemplary embodiment in such a way that two sequentially entered IOM data frames are divided into two data frames, hereinafter referred to as IOM * data frames, each of which is connected in parallel via separate interfaces to the transmitting devices 11 and 12 are transferable and there as intended, ie how IOM data frames can be processed further.
• the control unit 14 also controls the data frame conversion unit 13 in such a way that it outputs said IOM * data frames over the separate (IOM *) interfaces at a respective frame transmission rate, which is only half with 4 kHz or 4000 data frames per second is as high as the frame transfer rate of the IOM data frames sequentially entered into the data frame conversion unit 13.
• the conversion of the sequential IOM data frames into the parallel IOM * data frames taking place in the data frame conversion unit 13 is illustrated in FIG. 3.
• two sequential IOM data frames shown in the middle line in FIG. 3 are placed on a first IOM * data frame (shown in the lower line in FIG. 3) and one (in the top line of the Figure 3 shown) second IOM * data frame divided.
• Which user and control data sections of the IOM data frame are transferred to which locations within the IOM * data frame is illustrated by arrows in FIG. 3 and requires no further explanation.
• the IOM data frames can be divided up into the IOM * data frames, which are preferably of equal length and have an identical or at least similar structure, largely free of narrow restrictions.
• the division illustrated in FIG. 3 deserves special attention in two respects.
• the control data (for controlling the respective transmission devices 11 and 12) of the IOM data frames are not divided up by the division, but are treated as an inseparable whole, and on the other hand the Bl data sections on the one hand and the B2 data Sections of two sequential IOM data frames, on the other hand, are concentrated in one IOM * data frame, so that the first IOM * data frame has no B2 data sections and the second IOM * data frame has no B1 data sections.
• the former of the special features mentioned has the effect that the control of the respective transmission devices 11 and 12 can take place undisturbed by changes in the control data in successive IOM data frames.
• the second of the special features mentioned has the effect that, during the further processing or evaluation of such data frames, not only both BI and B2 data sections, but rather either only B1 data sections or only B2 data sections. Sections must be taken into account, which under certain circumstances can considerably simplify the further processing or evaluation of such data frames and make them more tolerant of errors.
• the conversion of two sequential IOM data frames into two parallel IOM * data frames enables them to be output from the data frame conversion unit 13 and processed further while maintaining the overall data transmission rate with half the data transmission rate. While 125 ⁇ s are available for the transmission of an IOM data frame (transmission of 8000 data frames per second), an IOM * data frame can, due to the parallel transmission and further processing, double the time for this, ie 250 ⁇ s for its transmission claim.
• the IOM * data frames can therefore be stretched in time compared to the IOM data frames (see also the time-standardized representation in FIG. 3).
• the IOM * data frames output in parallel from the data frame conversion device 13 are fed to the first transmission device 11 and the second transmission device 12 via separate transmission lines. There the IOM * data frames are reformatted, provided with new control data (control data for the receiving devices 21 and 22) and as U * -
• U * data frames are transferred to the respective transmission lines 31, 32 at a data transmission rate which is only half the size of the data transmission rate that would have to be provided if the identical amount of data in the form of undivided U- Data frames would only have to be transmitted via a single data transmission line.
• Splitting the purely sequential data stream (at the input connection E of the data frame conversion device 13) into two parallel data streams (on the transmission lines 31 and 32) has the positive effect that the data transmission rate on the respective transmission lines can be halved without reducing the overall data transmission rate.
• the concomitant narrowing of the transmission spectrum on the respective transmission lines makes it possible to place it in a frequency range in which the transmitted or to be transmitted data or data frames experience a comparatively low attenuation, which in turn results in an increased transmission range.
• the distance between the transmitting station 1 and the receiving station 2 adjoining it beyond the transmission path 3 can accordingly be increased without the intermediary of repeaters. With the techniques and methods currently used in ISDN systems, this can increase the range from approximately 5.5 km to approximately 7 km. This means that a not inconsiderable number of repeaters can be saved, particularly when bridging very large distances.
• the U * data frames output by the transmitting devices 11 and 12 on the transmission lines 31 and 32 are received by the receiving devices 21 and 22 of the receiving station 2, modified as IOM * data frames, and supplied to the data frame conversion device 23 (in parallel) in this is combined under control by the control unit 24 to form IOM data frames and, as such, is output sequentially via the output connection A for further processing.
• a second exemplary embodiment of the present invention will now be described with reference to FIG.
• the method according to the invention is used in the transmission station of a repeater.
• the transmission system shown schematically in FIG. 4 as a block diagram is again part of a
• the ISDN system includes a first repeater 4, a second repeater 5 and a transmission link 6.
• the first repeater 4, which in the present exemplary embodiment has an input connection E (U interface) with a (conventional) NT unit (not shown) or a further (conventional) repeater of the ISDN transmission system shown in detail in FIG. 4 may be connected comprises a receiving station, a transmitting station and a control unit 44.
• the second repeater 5 which in the present exemplary embodiment has an output connection A (U interface) with a (conventional) LT unit (not shown) or a further (conventional) repeater of the ISDN shown in detail in FIG. 4 Transmission system may be connected, also includes one
• Receiving station a transmitting station and a control unit 54; it also has a clock control unit for generating suitable clock signals for the transmitting and receiving station or the components contained therein.
• the transmission link 6 comprises two line pairs 61 and 62 and is the practical implementation of a U-interface connecting the repeaters. It is the range of this ISDN-U interface that is to be increased in the present exemplary embodiment by using the method according to the invention.
• the receiving station of the first repeater 4 is formed by a receiving device 41; the transmitting station of the first repeater 4 comprises a first transmitting device 42 and a second transmitting device 43.
• the receiving station of the second repeater 5 is formed by a first receiving device 51 and a second receiving device 52; the transmitting station of the second repeater 5 comprises a transmitting device 53.
• the receiving device 41 and the transmitting devices 42 and 43 of the first repeater 4 as well as the receiving devices 51 and 52 and the transmitting device 53 of the second repeater 5 are designed as transmitting / receiving units (transceivers) with corresponding external wiring, so that the transmitting devices in each case can also serve as receiving devices and the receiving devices can also serve as transmitting devices, and bidirectional communication is therefore possible.
• Both the transmitting devices and the receiving devices in the present exemplary embodiment are each implemented by the Siemens component PEB 2091 IEC-Q v5.1 with corresponding external wiring.
• control units 44 and 54 are implemented by microprocessors, microcontrollers and the like.
• the clock control unit of the second repeater 5 is designed as a PLL circuit 45 which supplies the respective transceivers of the second repeater with suitable clock signals, in part by evaluating control signals received from them.
• the data to be transmitted via the transmission link 6 are contained in data frames which are fed to the receiving device 41 of the first repeater 4 via its input connection E.
• these are not IOM data frames, but - since they are fed to the first repeater (from an NT unit or a further repeater) via a U interface - around different data frames, which are referred to below as U-data frames.
• a U data frame comprises a predetermined number of bits which are occupied by user data (BI, B2 and D data) and control data for controlling the receiving device 41.
• user data BI, B2 and D data
• control data for controlling the receiving device 41.
• Said U data frames are thus input into the receiving device 41 of the first repeater 4 via the input connection E.
• the receiving device 41 has an interface via which it can be connected to the control unit 44. Not only control commands but also data frames can be exchanged between the receiving device 41 and the control unit 44 via this interface. The same applies accordingly to the use of the identical transceivers for the transmitting devices 42 and 43.
• IOM data data sequentially output by the receiving device 41 and received by the control unit 44 There, frames are distributed to IOM * data frames which can be forwarded and processed in parallel and which are finally transmitted in parallel by the plurality of transmission devices 42 and 43 (after conversion into U * data frames) via the plurality of transmission lines 61 and 62 (U interfaces).
• splitting the purely sequential data stream (at the input terminal E of the receiving device) into two parallel data streams (on the transmission lines 61 and 62) has the positive effect that the data transmission rate on the parallel transmission lines 61 and 62 is reduced without reducing the Total data transfer rate can be halved.
• the concomitant narrowing of the transmission spectrum makes it possible to place it in a frequency range in which the transmitted or transmitted data or data frames experience a comparatively low attenuation, which in turn results in an increased transmission range .
• the distance between the first repeater 4 and the adjoining second repeater 5 or an adjoining LT unit can be increased accordingly (as in the first embodiment). In this way, a not inconsiderable number of repeaters can be saved, particularly when bridging very large distances.
• the second repeater 5 shown in FIG. 4 has the task of converting the parallel data stream or U * data frame stream transmitted from the first repeater via the transmission lines 61 and 62 into a sequential data stream or U data frame stream ⁇ walk.
• the U * data frames transmitted via the transmission lines 61 and 61 are received by the receiving devices 51 and 52 of the second repeater 5, converted there into (still parallel) IOM * data frames and output to the control unit 54, there into (sequential ) IOM data frame converted and forwarded to the transmitting device 53, and finally (after conversion into sequential U-data frames as such from the output connection A for forwarding and further processing.
• the data frame transmission conditions changed according to the invention require a more or less extensive adaptation of the clock signals for the respective transmitting and receiving devices both in the first exemplary embodiment and in the second exemplary embodiment.
• these devices are partially connected to control or clock signal lines, which, however, will not be discussed in more detail here.
• the method according to the invention is not restricted to the conversion of two sequential IOM data frames into two IOM * data frames that can be forwarded and processed in parallel. Rather, according to the respective needs, i.e. in particular in accordance with the required extent of narrowing the transmission spectrum, any number of arbitrary data frames can be converted into any number of parallel transferable and forwardable data frames.
• the invention can also be used outside of ISDN systems.

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• Engineering & Computer Science (AREA)
• Computer Networks & Wireless Communication (AREA)
• Power Engineering (AREA)
• Signal Processing (AREA)
• Communication Control (AREA)
• Time-Division Multiplex Systems (AREA)

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Citations (5)

• 1996
  • 1996-05-30 DE DE19621750A patent/DE19621750C2/de not_active Expired - Lifetime
• 1997
  • 1997-05-05 EP EP97925837A patent/EP0901742A1/de not_active Withdrawn
  • 1997-05-05 WO PCT/DE1997/000912 patent/WO1997047155A1/de not_active Application Discontinuation
  • 1997-05-05 CN CN97195083A patent/CN1220814A/zh active Pending
  • 1997-05-05 JP JP10500070A patent/JP2000514609A/ja active Pending
  • 1997-05-05 KR KR1019980709778A patent/KR20000016209A/ko not_active Application Discontinuation
  • 1997-05-06 TW TW086106009A patent/TW361023B/zh active

Patent Citations (5)

Non-Patent Citations (1)

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