公开(公告)号：DE3788604T2

公开(公告)日：1994-06-30

申请号：DE3788604

申请日：1987-07-21

Applicant: IBM

Inventor： BUX WERNER K ,  DIAS DANIEL M ,  GOYAL AMBUJ

IPC: H04L12/433 ,  H04L12/28

Abstract: In a communication system comprising several stations, access to the ring is granted to one station at a time by circulating a token on the ring and updating the priority of the token when required to provide priority access. This invention provides for a first station to transmit a token immediately after it has finished transmitting a frame containing a packet(s) needed to be transmitted from the first station without waiting for the header of the frame to return to the first station. A priority signalling packet (60) is then transmitted on the ring from the first station after the first station transmits the token on the ring. This priority signalling packet contains received information as to the particular priority level that the token should be updated to. Finally, the priority level of the token (50) is updated to correspond to the particular priority level when the priority signalling packet (60) reaches the station (17) that holds the token.

公开(公告)号：DE3788604D1

公开(公告)日：1994-02-10

申请号：DE3788604

申请日：1987-07-21

Applicant: IBM

Inventor： BUX WERNER K ,  DIAS DANIEL M ,  GOYAL AMBUJ

IPC: H04L12/433 ,  H04L12/28

Abstract: In a communication system comprising several stations, access to the ring is granted to one station at a time by circulating a token on the ring and updating the priority of the token when required to provide priority access. This invention provides for a first station to transmit a token immediately after it has finished transmitting a frame containing a packet(s) needed to be transmitted from the first station without waiting for the header of the frame to return to the first station. A priority signalling packet (60) is then transmitted on the ring from the first station after the first station transmits the token on the ring. This priority signalling packet contains received information as to the particular priority level that the token should be updated to. Finally, the priority level of the token (50) is updated to correspond to the particular priority level when the priority signalling packet (60) reaches the station (17) that holds the token.