• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    1474726 Automatic exchange systems SIEMENSAG 16 Aug 1974 [18 Sept 1973] 36085/74 Heading H4K A T.D.M. telecommunication system ineludes subscriber stations each connected over an individual line pair to a concentrator, digital code transmission is used for speech over each subscribers line pair and the duration of the elements of the codes are such that the total duration of one speech code transmitted in each direction together with the transmission transit times occupy substantially all of at least one T.D.M. cycle. The object of using the whole time cycle to transmit and receive a code over the line pair is to avoid attenuation caused by time slot division normally necessitated by two wire digital working and to allow the line pair to be of long length, e.g. 10 km. As shown speech samples are transmitted to and from each substation over a corresponding line pair Z. Delta modulation is employed. The one and zero bits are transmitted over this line pair as positive and negative potentials and are generated and detected by operational amplifiers L and 01, 02 respectively, the detector comprising a pair of amplifiers 01, 02 connected to distinguish the zero bit from no signal in order to avoid the need for a start code. The amplifiers are connected to effect conversion to and from four wire form. Intermediate stores S and E and switches KZS, KZe, KVe and KVs effect concentration and multiplexing on to the transmit pair VS and demultiplexing and distribution from the receive pair VE of the four wire path. The substations are provided with low grade clock pulse generators which are not synchronized with the exchange clock.
    公开号:SU1264851A3
    申请号:SU742059151
    申请日:1974-09-06
    公开日:1986-10-15
    发明作者:Лутц Карл-Антон；Кнорпп Эберхард
    申请人:Сименс Аг (Фирма)；
    IPC主号:
    专利说明:

    1 The invention relates to radio engineering and can be used in the transmission of digital information in a communication network with temporary compaction over subscriber connecting lines connecting subscriber stations, operating with a digital code, with a subscriber hub. The purpose of the invention is to increase the reliability of transmission. Fig. 1 shows a structural electrical circuit of a temporary differential system, with the help of which the proposed method j is implemented in Fig. 2, a diagram of voltages that reduce the operation of the system. The time differential system, by which the proposed method is implemented, contains the first switch 1 located in a pair of receiving wires 2 of the four-wire line 3 of the subscriber hub, the second switch 4 in the pair of transmitting wires 5 of the four-wire line of the subscriber concentrator, transfer register 6, third switch 7, reception register 8, fourth switch 9, amplifier 10 M, QI, I.PI element 1 1, first and second operational amplifiers 12 and 13, adjustable resistor 14, transistor 15, having first the winding 16 and the secondary winding 17 with a capacitor 18 connected thereto, resistors 19 and 20, and a two-wire subscriber connecting line 21. Information is transmitted along two directions of the two-wire subscriber connecting lines alternately with time distribution and information bits with such a time duration that they, together with the propagation time along the subscriber connecting lines, almost completely occupy the read intervals (or most of them), which lie transmission based on the incoming and outgoing lines, time division subscriber hub to the limit of the interval, the permissible period for a clock generator, op thinned guide clock bits subscriber station, compared with a period of 55 tak
    A station’s clock generator of the end station connected to the subscriber concentration of the two-wire subscriber trunk line 21 should be considered as a transmit register and t in a torus. A relatively poor quality generator that does not need to be used as a clock generator in subscriber stations synchronization with the station clock. In addition, in the case of delta modulation of information, the information bits are transmitted as part of groups of information elements that span several information bits corresponding to the read information values belonging to the same BpeMeHHONry information channel in a direct time sequence, and interlace which in both directions of transmission occurs within the corresponding majority of readout intervals. Thus, in the case of delta modulation of information, the proposed method can also be applied without a limited length of subscriber trunk lines due to the duration of the transmission compared to the capabilities of pulse code modulation. In addition, the information bits are transmitted in the form of positive and negative potential values relative to the reference potential, which eliminates the additional signal bit to indicate the beginning of the code group. The time differential system, by means of which the proposed method is implemented, works as follows. When transmitting communication information, it is about pulse-modulated information, which is depicted using code words, each of 8 bits, cyclically repeating through 125 μs. The bit rate over the CMM LINES with a temporary compression of such a long-distance network is, therefore, 2048 Mbps. In accordance with this, the first switch 1 (Fig. 1), which is paired with the receiving wires 2 of the four-wire line 3 of the subscriber hub, operates at a switching frequency of 2,048 MHz. Through this first switch 1, part of the information goes to register 6, which can accumulate 8 bits, therefore, one KIM word.
    From the transfer register 6, part of the information through the third switch 7 is supplied to the power amplifier 10, from it through the primary and secondary windings 16 and 17 of the translator 15 to the two-wire subscriber connecting line 21. The third switch 7 operates with a much lower frequency than the first switch 1, for example, at a frequency of 256 kHz. As the string comparison (FIG. 2 a, e) shows, the information bits that are fed to the two-wire subscriber trunk line 21 have a significantly longer duration than the information bits after upayuschie a subscriber hub (not shown in Figure 1) of KIM-LINE with vremennsh seal.
    As can be seen from the comparison of lines (FIG. 2 a, b), the information bits sent to the two-wire subscriber connecting line 21 after the transit time t arrive at the subscriber station (not shown in figure 1) connected to the two-wire subscriber connecting line. Right after the full reception of this information, information is sent from the subscriber station in the opposite direction, and the information bits also have a pulse width corresponding to a transmission frequency of 256 kHz (Fig. 2c). To reach the subscriber's hub, the transit time I is also required here (Fig. 2c, d). Through the fourth switch 9, this information enters the reception register 8, which is also able to register a 8-bit CMR-WORD.
    From the transmission of a part of information via a two-wire subscriber connecting line 21 (FIG. 2 a) to the reception of a part of information transmitted in the opposite direction to the subscriber station (FIG. 2 g), the duration of the code group of pulses from 125 ISS to the time interval T , which should be blocked by intermediate accumulation in the reception register 8, until, as a result of the second switch 4, part of the information on the pair of transmitting wires 5 does not fall from the subscriber hub to a CMM LINE with a temporary seal. In this case, the selection of the width of the information bits transmitted over the two-wire subscriber connecting line 21 is made so that the code group of pulses is used as widely as possible for this transmission, however, so that the remaining length of time T is not less than the allowable limit interval between the clock period, defined the beat of the subscriber station, and the period of the clock generator of the station, which determines the beat of the end station and connected to the subscriber hub. However, this achieves the best ratios of attenuation and distortion of the pulses transmitted over the two-wire subscriber trunk line 21 when using a lower quality pulse generator at the subscriber station.
    权利要求:
    Claims (4)
    [1]
    As already indicated, the information bits are transmitted in the form of positive and negative values of the potential with respect to the reference potential. Thus, it is possible to refuse to transmit an additional bit to characterize the beginning of the word. A comparator is provided for recognizing SIM words arriving at the subscriber hub via the two-wire subscriber connecting line 21, which is implemented using the first and second operational amplifiers 12 and 13. In addition, the non-inverting input the first operational amplifier I2 is connected to one output of the primary winding 16 of the translator 5), and the inverting input of the second operational amplifier 13 is connected to another output of the primary 16 translator ki 16. To ensure operability, the secondary winding 17 of the transducer 15 is connected to a capacitor 18 and resistors 19 and 20. Accordingly, the other inputs of the first and second operational amplifiers 12 and 13 are connected to the reference potential via an adjustable resistor 14, which is on the other hand grounded . The output of the first operational amplifier 12 through the fourth switch 9 is connected to the receive register 8, as well as to the input of the OR element 11, the output of which is connected to the control input of the fourth switch 9. Connect the output of the second operational amplifier 13 to another input of the OR 11. If If the two-wire user connection line 21 transmits the IMC-WORD, the first bit of which is a half-period corresponding to the binary value t, then the corresponding positive signal passes through the output of the first operational amplifier 12. th potential that it simultaneously through an OR gate 11 goes to a control input of the fourth switch 9, and is transmitted further to the receiving register 8. On the contrary, if the incoming bit is a half-period corresponding to the binary value O, then the potential of the second operational amplifier is controlled by the output of the first operational amplifier 12 at the output of the first operational amplifier 12. 13 and coming to the control input of the fourth switch 9 through the element OR I1 so that this bit can also go to the receive register 8. During breaks, each time with two CMM words coming through a two-wire subscriber connecting line 21, if the line wires are connected to the reference potential, the fourth switch 9 remains non-conductive, therefore, the potential state corresponding to the binary value O is sharply different from the potential state during pauses of speech. Claim 1. A method of transmitting digital information in a communication network with a temporary compression, in which alternately transmit digital information between a subscriber station and a subscriber hub in a temporary distribution on a subscriber line, while on temporary compressed lines connected to the subscriber station. the hub for incoming and outgoing information transmission directions form information reading intervals, the duration of which is less than the length of information bits transmitted over the subscriber before transferring the bits of information from the secondary station to the subscriber hub and vice versa, the information is accumulated intermediately, while the information bits are transmitted to the subscriber hub after intermediate accumulation and from the subscriber hub before the intermediate accumulation with a clock frequency of the line with temporary compression, and bits of information during transmission to the subscriber station after intermediate accumulation and from the subscriber station before intermediate accumulation are transmitted from It is lower than the clock frequency of the line with temporary compression, characterized in that, in order to increase the reliability of the transmission, the frequency of transmission on the subscriber line is reduced compared to the clock frequency of the line with temporary compression to the limit 2nb + 21 + Tp, the width of the information bits; the number of bits of information; transit time of the subscriber line; temporal frequency instability, depending on the frequency tolerance between the generator bit in the subscriber stations and the clock of the subscriber hub generator; the length of the code group of read pulses.
    [2]
    2. Pop-up method 1, distinguished by the fact that the information bits are parts of code words, which are alternately transmitted in both directions of transmission during each code count of impulses.
    [3]
    3. Method pop.1, which is also distinguished by the fact that the information bits are delta modulation bits, which form from code groups of read pulses and which change for both directions of the nepe-i problem after n code groups of read pulses .
    [4]
    4. A method according to claim 1, characterized in that the information bits are transmitted in the form of positive and negative values of the potential relative to the reference potential.
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    类似技术:
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    US5327277A|1994-07-05|Method and apparatus for determining equalization delays in a transmission system and related apparatus
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    US4049908A|1977-09-20|Method and apparatus for digital data transmission
    US2636081A|1953-04-21|Supervisory circuits for pulse code modulation
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    US3647976A|1972-03-07|Time-sharing subscriber communications system
    EP0124576B1|1987-08-19|Apparatus for receiving high-speed data in packet form
    SU608492A3|1978-05-25|Method of transmitting and receiving communication signals, particularly with pulse-code modulation with time-division multiplex
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    US2833861A|1958-05-06|Communication sysem, intermediate relay repeater station
    US2870260A|1959-01-20|Speech interpolation communication system
    US4472799A|1984-09-18|Method of and means for synchronizing a receiving section of a digital telecommunication system
    US3023278A|1962-02-27|Four wire line concentrator circuit
    GB680702A|1952-10-08|Mixed modulation in pulsed intercommunication systems
    US4370525A|1983-01-25|Variable rate timing circuit
    SU970713A1|1982-10-30|Digital information transmission system
    同族专利:
    公开号 | 公开日
    NO138263C|1978-08-02|
    AU7308174A|1976-03-11|
    CH584485A5|1977-01-31|
    DK490574A|1975-05-12|
    IT1021429B|1978-01-30|
    AT335522B|1977-03-10|
    US3974339A|1976-08-10|
    ATA731674A|1976-07-15|
    JPS5444523B2|1979-12-26|
    DE2346984B2|1975-10-30|
    DE2346984A1|1975-04-24|
    BE820068A|1975-03-18|
    JPS5058907A|1975-05-22|
    SE7411758L|1975-04-30|
    NL7411215A|1975-03-20|
    FR2244315B1|1979-10-19|
    NO743055L|1975-04-14|
    SE395583B|1977-08-15|
    GB1474726A|1977-05-25|
    LU70925A1|1975-02-24|
    FR2244315A1|1975-04-11|
    NO138263B|1978-04-24|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    FR2129186A5|1971-03-18|1972-10-27|Constr Telephoniques|JPS5812779B2|1975-06-30|1983-03-10|Mitsubishi Electric Corp|
    DE2927228A1|1979-07-05|1981-01-08|Semens Ag|METHOD FOR THE FOUR-WIRED TRANSMISSION OF DIGITAL MESSAGE SIGNALS|
    US4388716A|1979-11-15|1983-06-14|Fuji Electric Co., Ltd.|Two-way transmission system|
    FR2479515B1|1980-03-28|1985-03-15|Telecommunications Sa|
    JPH0124387B2|1981-04-15|1989-05-11|Nippon Electric Co|
    GB2109197B|1981-10-13|1985-12-04|Standard Telephones Cables Ltd|Radio system|
    AT54521T|1985-08-14|1990-07-15|Siemens Ag|ARRANGEMENT FOR A TRAFFIC GUIDE AND INFORMATION SYSTEM.|
    DE3632710A1|1986-09-26|1988-03-31|Philips Patentverwaltung|TWO-WIRE TIME SEPARATION METHOD FOR FULL-DUPLEX TRANSFER BETWEEN A MAIN STATION AND A SUB-STATION|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    DE19732346984|DE2346984C3|1973-09-18|
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