公开(公告)号：US3647949A

公开(公告)日：1972-03-07

申请号：US3647949D

申请日：1969-06-23

Applicant: IBM

Inventor： CLOSS FELIX H ,  SEITZER DIETER ,  STUCKI PETER

IPC: H04J3/17 ,  H04J3/24 ,  H04N1/411 ,  H04N1/44 ,  H04N21/2365 ,  H04N21/434

CPC classification number: H04N21/4347 ,  H04J3/17 ,  H04J3/24 ,  H04N1/411 ,  H04N21/2365

Abstract: A system is provided for the simultaneous transmission of pictures between a plurality of scanning stations and a plurality of corresponding receiver stations. The pictures to be transmitted comprise two levels of brightness such as, for example, a document having black print on a white background. Each of the scanning stations scans, in a pseudorandom fashion, its respective picture to provide an output signal indicative of the information on one of the levels of brightness, as for example, the black print information on the document. This information output signal is then multiplexed. A coder and multiplexer upon receiving an information signal, during a given time interval, from one of the scanning stations generate an address signal corresponding to the address of the station providing the information signal whereupon the address signal is transmitted to a decoder at the receiving end for decoding and providing an information signal to the appropriate receiver. When the coder and multiplexer simultaneously receive information signals from two scanning stations within a given time interval a priority control circuit selects one of the signals.

Abstract translation: 提供一种用于在多个扫描站和多个对应的接收站之间同时传输图像的系统。 要发送的图像包括诸如例如在白色背景上具有黑色打印的文档的两个亮度级别。 每个扫描站以伪随机的方式扫描其各自的图像，以提供指示关于亮度级别之一的信息的输出信号，例如关于文档的黑色打印信息。 该信息输出信号被复用。

公开(公告)号：US3647977A

公开(公告)日：1972-03-07

申请号：US3647977D

申请日：1970-05-07

Applicant: IBM

Inventor： CLOSS FELIX H

IPC: H04J3/00 ,  H04J3/16 ,  H04N21/2365 ,  H04N21/434

CPC classification number: H04N21/2365 ,  H04J3/1688 ,  H04N21/4347

Abstract: A multiplexer for use in a transmission system is provided with a priority switch with n inputs and n outputs. When a signal is present on only one of the inputs, the switch acts to connect the signal to its associated output. When a signal is present on more than one input at a given time, the priority switch acts to select for connection only one of the signals to its associated output, the selection process being achieved in a pseudorandom manner.

Abstract translation: 在传输系统中使用的多路复用器具有具有n个输入和n个输出的优先权开关。 当信号仅存在于一个输入端时，开关用于将信号连接到其相关的输出。 当在给定时间在多于一个输入上存在信号时，优先级开关用于选择用于将仅一个信号连接到其相关联的输出，该选择过程以伪随机方式实现。

公开(公告)号：CA947887A

公开(公告)日：1974-05-21

申请号：CA81465

申请日：1970-04-30

Applicant: IBM

Inventor： CLOSS FELIX H

IPC: H04J3/00 ,  H04J3/16 ,  H04N21/2365 ,  H04N21/434

公开(公告)号：CA949244A

公开(公告)日：1974-06-11

申请号：CA122962

申请日：1971-09-16

Applicant: IBM

Inventor： CLOSS FELIX H ,  MUELLER HANS R ,  WILD DANIEL ,  PORT ERICH ,  RUDIN HARRY JR

IPC: H04J3/12 ,  H04J3/16 ,  H04L12/43 ,  H04Q11/04

Abstract: 1357150 T.D.M. exchange systems; data transmission INTERNATIONAL BUSINESS MACHINES CORP 16 Sept 1971 [30 Sept 1970] 43157/71 Headings H4K and H4P In a system for channel switching between a plurality of incoming and a plurality of outgoing T.D.M. highways, two time slots of each frame on each highway are used jointly to provide a single channel reserved for signalling (dialling &c.) and data transmission, one time slot of each pair being used for signals or data the other being used to transmit an associated subscriber address. The system shown switches between incoming and outgoing P.C.M. highways 25 and 27. The highways may be loops (Fig. 1, not shown) on which subscriber station 11a to 11c and T are located. The stations may include speech telegraph and video equipment. The incoming highways 25 are scanned by a scanner 29 (described below) to produce a succession of P.C.M. codes in parallel form on output 53 to AND gate groups 59, 81 and 71 and for each code a corresponding highway time slot number on an output 55 to a decoder 57. If the decode recognizes that this is the first time slot of that highway frame it enables via P1 AND gate group 71 to feed the code from that time slot into an intermediate store 75 where it is held until that highway is due to be scanned again. The code used in the first time slot includes an address of the calling station, a flag bit indicating whether the code in the other time slot of the pair is a signalling code or data for onward transmission and a parity bit. When an incoming highway is scanned a second time the decoder 57 recognizes that the second time slot is being scanned and enables via P2 AND gate group 81 to gate the code in that time slot on to bus 83. At this time the code taken from time slot 1 of that incoming highway appears at the output of store 75 and depending on whether the signalling bit is a "1" or a "0" AND gate groups 89 and 91 or an AND gate group 103 is enabled. In the former ease the calling subscriber address and the signalling code (e.g. dial signal code) are transferred to registers 93 and 95 for interpretation by the exchange control unit 101 while in the latter case the calling subscriber address from store 75 is used to address a store 107 to obtain the address of the called subscriber, this being used to gate itself and the data code on bus 83 into queueing stores such as 121a and 121b associated with the outgoing highway.

公开(公告)号：DE3066854D1

公开(公告)日：1984-04-12

申请号：DE3066854

申请日：1980-10-15

Applicant: IBM

Inventor： LEE ROBERT POON-LUN ,  CLOSS FELIX H

IPC: H04L12/44 ,  H04L12/56 ,  H04Q5/00 ,  H04Q9/00 ,  H04L11/16

Abstract: A communication system for data packets comprises a multiplicity of nodal units inter-connected in an inverted tree hierarchy by a network of duplex data channels. Each unit (1, 20 or 22) comprises an up-port (33 min ) connected to another unit at a higher level or, in the case of the root nodal unit, via a loop line (3) back on itself. Each unit further comprises a plurality of down-ports connected to other nodal units (e.g. node 5) at lower levels or to terminal transceiver devices (e.g. port 40). The system operated for transmission up the hierarchy on a demand assignment basis whereby the demand detect logic (63, 65 or 67) which is first to detect incoming data, produces the first request signal RQ. This first request signal causes its own access control unit (57, 59 or 61) to provide a gating signal to its associated gate (51, 53 or 55) and an inhibit signal to the other access control unit. Data is broadcast downwardly, data arriving from a higher level is routed to all the next lower level nodes (2, 3 and 4).

公开(公告)号：CA971291A

公开(公告)日：1975-07-15

申请号：CA130048

申请日：1971-12-14

Applicant: IBM

Inventor： CLOSS FELIX H ,  MUELLER HANS R ,  WILD DANIEL

IPC: H04J3/06 ,  H04J3/24 ,  H04Q11/04

Abstract: A decentralized time division multiplex communication system having independent exchange modules arranged to individually set up connections without the need of central control. Commonality of hardware is limited to a simple interconnection unit, and a clock allowing synchronization of all modules. Each exchange module, with its associated group of terminals, is arranged to form a time division multiplex system of first order. The exchange modules, together with the interconnection unit, are arranged to form a super-multiplex system, i.e., a time division multiplex system of second order. All bus line time division multiplex channels of all exchange modules are interspersed on the interconnection unit. To each of these bus line channels, a time slot is permanently assigned in the super-multiplex time frame.

公开(公告)号：CA1141838A

公开(公告)日：1983-02-22

申请号：CA360342

申请日：1980-09-16

Applicant: IBM

Inventor： LEE ROBERT P ,  CLOSS FELIX H

IPC: H04L12/44 ,  H04L12/56 ,  H04B1/38 ,  H04B3/50

Abstract: METHOD AND MEANS FOR DEMAND ACCESSING AND BROADCAST TRANSMISSION AMONG PORTS IN A DISTRIBUTED STAR NETWORK A demand access broadcast transmission method and means capable of supporting random port access and any-to-any transmission at very high data rates. A communication medium formed from an inverted tree network of nodes and full duplex connecting links permits the establishment of a path lock up-link through the network from a demanding port to a root node on a first-come first-serve demand access basis with arbitration at each distinct tree node level. Broadcast transmission is perfected down-link over all fan-out paths from the root node. Collision is avoided by locking a path to a port and by limiting race conditions among active ports to only the leading edges of messages. Thus, relinquishment of a broadcast channel overlapped with retransmission of a message does not result in path seizure since the occurrence of message leading edges is the singular path connection invoking event. SA9-79-011

公开(公告)号：CA903094A

公开(公告)日：1972-06-20

申请号：CA903094D

Applicant: IBM

Inventor： SEITZER DIETER ,  CLOSS FELIX H ,  STUCKI PETER