公开(公告)号：ES2136118T3

公开(公告)日：1999-11-16

申请号：ES93480059

申请日：1993-05-19

Applicant: IBM

Inventor： CIDON ISRAEL ,  DAVENPORT DAVID WILLIAM ,  DERBY JEFFREY HASKELL ,  DUDLEY JOHN GARY ,  GOPAL INDER SARAT ,  JANNIELLO JAMES PATRICK

IPC: H04L12/18 ,  H04L12/56

Abstract: A packet communications system provides for point-to-point packet routing and broadcast packet routing to limited subsets of nodes in the network, using a routing field in the packet header which is processed according to two different protocols. A third protocol is provided in which a packet can be broadcast to the limited subset even when launched from a node which is not a member of the subset. The routing field includes a first portion which contains the route labels necessary to deliver the packet to the broadcast subset. A second portion of the routing field contains the broadcast subset identifier which can then be used to deliver the packet to all of the members of the broadcast subset. Provision is made to backtrack deliver the packet to the last node identified before the broadcast subset if that last node is itself a member of the subset.

公开(公告)号：CA2095891C

公开(公告)日：1998-11-10

申请号：CA2095891

申请日：1993-05-10

Applicant: IBM

Inventor： CIDON ISRAEL ,  DONEY RICHARD M ,  DRAKE JOHN ELLIS JR ,  HERVATIC ELIZABETH ANNE ,  POTTER KENNETH HARVEY JR ,  TEDIJANTO THEODORE ERNEST

IPC: H04L12/56 ,  H04L12/64 ,  H04L29/06 ,  H04L29/08

Abstract: A protocol is defined for mixed data/voice/multimedia communications systems to transmit and receive high-priority, real-time traffic over low-speed digital com munication links by embedding such high priority traffic in low priority, non-real-time tra ffic. High priority, real-time packets are thus transmitted without delay by preempting low -priority packets. Low priority, non real-time packets are held during preemption, and low priority transmission is automatically resumed after transmission of high priori ty packets has been completed. A protocol is defined for communications systems to exchange information, at the time that a communication link is activated, defining their link capabilities for handling high priority, real-time packets and to agree on how t his high priority traffic will be transmitted on the communication link.

公开(公告)号：DE68926650D1

公开(公告)日：1996-07-18

申请号：DE68926650

申请日：1989-09-28

Applicant: IBM

Inventor： CIDON ISRAEL ,  GOPAL INDER SARAT

IPC: H04L12/433 ,  H04L12/56 ,  H04L12/42 ,  H04L12/64

Abstract: A method of transmitting high speed (1 Gbits/sec), packetized, integrated voice/data through a communications network. Also included is a fast contention resolution unit for resolving contention among a plurality of adapters for access to a communications network. Included in the fast contention resolution unit is an apparatus for transmitting a token about a ring from one sound to another bypassing intermediate cells whose associated adapters do not have a request to gain access to the communications network.

公开(公告)号：CA2142029A1

公开(公告)日：1995-08-08

申请号：CA2142029

申请日：1995-02-07

Applicant: IBM

Inventor： CIDON ISRAEL ,  GEORGIADIS LEONIDAS ,  GUERIN ROCH A ,  SHAVITT YUVAL Y ,  SLATER ANDREW E

IPC: G06F13/00 ,  H04L12/433 ,  H04L12/28

Abstract: A non-quota access indicator is circulated among nodes in a multi-node quota based communication system with a shared resource, indicating maximum possible non - quota access to the shared resource to a given node receiving same. Upon arrival at a nod e, the indicator is saved and then updated to reflect the current status of that node as either starved or satisfied, the former being a condition of currently having quota remaining and a share d resource access requirement, and the latter being a condition of either currently having no remaining quota or having no current shared resource access requirement. After updating, the no de immediately propagates the indicator to the next node in the system. When a node without quota requires access to the shared resource, it compares its requirement to the last store d indicator and accesses the shared resource if the stored indicator is equal to or greater than the access requirement.

公开(公告)号：CA2100539A1

公开(公告)日：1994-05-20

申请号：CA2100539

申请日：1993-07-14

Applicant: IBM

Inventor： DERBY JEFFREY H ,  DRAKE JOHN E JR ,  DUDLEY JOHN G ,  HERVATIC ELIZABETH A ,  JANNIELLO JAMES P ,  KAPLAN MARC A ,  KESNER BARRY A ,  KOPERDA FRANCIS R ,  PETERS MARCIA L ,  POTTER KENNETH H ,  TSIGLER ANDREV L ,  MARIN GERALD A ,  GOPAL INDER S ,  CIDON ISRAEL

IPC: H04L12/18 ,  H04L12/56 ,  H04Q11/04