公开(公告)号：CA2103134A1

公开(公告)日：1995-05-16

申请号：CA2103134

申请日：1993-11-15

Applicant: IBM CANADA ,  IBM ,  PHOTONICS CORP

Inventor： CHEN JEANE S ,  FICKES STANLEY L ,  HARTLEN BRYAN R ,  KURATA TOM D ,  MARYAN JACEK P ,  MCKAY DAN N ,  WILLIAMS TIMOTHY F

IPC: H04L12/413 ,  H04L29/08

Abstract: A method is provided for controlling access to a communication medium intended for sharing by a least two stations to enable peer-to-peer communications therebetween. It includes the steps of sensing the medium at a first station to determine if the medium is in use. The first station transmitting a connection request message intended for a second station if the first station senses that the medium is not in use. Receiving at the second station the connection request message. The second station transmitting a connection confirm message intended for reception at the first station for the purpose of establishing a reservation of the transmission medium for use by the first and second stations. Transmitting information as one or more date messages from the first station to the second station. The second station upon receiving the last of the data messages from the first station transmitting an acknowledgement message intended for reception by the first station. The first station upon receiving the acknowledgement message subsequently transmitting a disconnect request message to the second station. The second station upon receiving the disconnect request message subsequently transmitting a disconnect confirm message for reception by the first station for the purpose of ending the reservation of the medium.

公开(公告)号：JPH07226761A

公开(公告)日：1995-08-22

申请号：JP28938194

申请日：1994-11-24

Applicant: IBM

Inventor： AHMADI HAMID ,  CHEN JEANE S ,  ARVIND KRISHNA ,  YORAM OFEK

IPC: G06F13/00 ,  H04L12/46 ,  H04L12/42 ,  H04L12/28

Abstract: PURPOSE: To connect a first and a second multiple node communication routes in which each allocation and assignment system is used with a bridge node and to provide a method and a device to enable to access the route by the node on the route. CONSTITUTION: The access to a second route is controlled by a second signal to transmit information directed to the first route to the bridge node 16 by propagating the first allocation and assignment signal on the first route and propagating a second allocation and assignment signal on the second route. The allocation and assignment signal is synchronized so as to assure that the second signal circulates only once by every time the first signal circulates. When the bridge node is full, the information from the first route to the second route is deviated around the first route from the bridge node.