公开(公告)号：HK7795A

公开(公告)日：1995-01-27

申请号：HK7795

申请日：1995-01-19

Applicant: IBM

Inventor： AHMADI HAMID ,  BEHA JOHANNES GEORG ,  DENZEL WOLFGANG ,  ENGBERSEN ANTONIUS ,  LUIJTEN RONALD ,  MURPHY CHARLES ,  PORT ERICH

IPC: H04L12/56 ,  H04L12/54 ,  H04L12/58

Abstract: In a switching system interconnecting transmission links (21-i, 23-i) on which circuit switched (CS) and packet switched (PS) information is transferred, a switch fabric (11) is provided which interconnects a plurality of input ports (15-i) to a plurality of output ports (19-i). The information arriving on incoming links is converted in switch adapters (13-i) to uniform minipackets, each having a routing address designating the required output port. The switch fabric consists of parallel equal switching slices, e.g. binary routing trees (71), which transfer in a non-blocking manner each minipacket from its input port to one output port in response to the routing address. Collecting means (73, 75) are provided at each output port for accepting the minipackets arriving from the different input ports.

公开(公告)号：DE3788649T2

公开(公告)日：1994-06-23

申请号：DE3788649

申请日：1987-10-20

Applicant: IBM

Inventor： AHMADI HAMID ,  BEHA JOHANNES GEORG ,  DENZEL WOLFGANG ,  ENGBERSEN ANTONIUS ,  LUIJTEN RONALD ,  MURPHY CHARLES ,  PORT ERICH

IPC: H04L12/56 ,  H04L12/54 ,  H04L12/58

Abstract: In a switching system interconnecting transmission links (21-i, 23-i) on which circuit switched (CS) and packet switched (PS) information is transferred, a switch fabric (11) is provided which interconnects a plurality of input ports (15-i) to a plurality of output ports (19-i). The information arriving on incoming links is converted in switch adapters (13-i) to uniform minipackets, each having a routing address designating the required output port. The switch fabric consists of parallel equal switching slices, e.g. binary routing trees (71), which transfer in a non-blocking manner each minipacket from its input port to one output port in response to the routing address. Collecting means (73, 75) are provided at each output port for accepting the minipackets arriving from the different input ports.

公开(公告)号：DE3788649D1

公开(公告)日：1994-02-10

申请号：DE3788649

申请日：1987-10-20

Applicant: IBM

Inventor： AHMADI HAMID ,  BEHA JOHANNES GEORG ,  DENZEL WOLFGANG ,  ENGBERSEN ANTONIUS ,  LUIJTEN RONALD ,  MURPHY CHARLES ,  PORT ERICH

IPC: H04L12/56 ,  H04L12/54 ,  H04L12/58

Abstract: In a switching system interconnecting transmission links (21-i, 23-i) on which circuit switched (CS) and packet switched (PS) information is transferred, a switch fabric (11) is provided which interconnects a plurality of input ports (15-i) to a plurality of output ports (19-i). The information arriving on incoming links is converted in switch adapters (13-i) to uniform minipackets, each having a routing address designating the required output port. The switch fabric consists of parallel equal switching slices, e.g. binary routing trees (71), which transfer in a non-blocking manner each minipacket from its input port to one output port in response to the routing address. Collecting means (73, 75) are provided at each output port for accepting the minipackets arriving from the different input ports.

公开(公告)号：CA1038091A

公开(公告)日：1978-09-05

申请号：CA225330

申请日：1975-04-18

Applicant: IBM

Inventor： KUMMERLE KARL A ,  PORT ERICH ,  ZAFIROPULO PITRO A

IPC: H04J3/00 ,  H04J3/16 ,  H04J3/17 ,  H04L12/64

Abstract: METHOD OF TRANSMITTING INFORMATION AND MULTIPLEXING DEVICE FOR EXECUTING THE METHOD A method for transmitting information from different sources over a common transmission medium is described. Data from a first set of sources is transmitted as circuit - switched traffic in periodic time slots of sequential time frames. The time slots are temporarily assigned to the sources and the size and position of any time slot within a frame cycle is determined by its respective assignment. Data from a second set of sources is intermediately stored in a buffer store as store-and-forward traffic. The data stored in the buffer store is sequentially extracted from the store and transmitted in the data stream in gaps left in the time frame between time slots in the circuit-switched traffic. A new time slot is assigned to one of the first set of sources only if the remaining channel capacity available to the store-and-forward traffic will not be less than a fixed minimum value.

公开(公告)号：SG173494G

公开(公告)日：1995-04-28

申请号：SG173494

申请日：1994-12-06

Applicant: IBM

Inventor： AHMADI HAMID ,  BEHA JOHANNES GEORG ,  DENZEL WOLFGANG ,  ENGBERSEN ANTONIUS ,  LUIJTEN RONALD ,  MURPHY CHARLES ,  PORT ERICH

IPC: H04L12/56 ,  H04L11/20

Abstract: In a switching system interconnecting transmission links (21-i, 23-i) on which circuit switched (CS) and packet switched (PS) information is transferred, a switch fabric (11) is provided which interconnects a plurality of input ports (15-i) to a plurality of output ports (19-i). The information arriving on incoming links is converted in switch adapters (13-i) to uniform minipackets, each having a routing address designating the required output port. The switch fabric consists of parallel equal switching slices, e.g. binary routing trees (71), which transfer in a non-blocking manner each minipacket from its input port to one output port in response to the routing address. Collecting means (73, 75) are provided at each output port for accepting the minipackets arriving from the different input ports.

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.