公开(公告)号：DE69331180D1

公开(公告)日：2002-01-03

申请号：DE69331180

申请日：1993-09-08

Applicant: IBM

Inventor： BRANDNER JAMES MICHAEL ,  MANULIK ROBERT JOHN ,  MEYER III ARTHUR J ,  SCHREITER MARK EUGENE

IPC: G06F13/00 ,  H04L12/403 ,  H04L12/56 ,  H04L29/06 ,  H04L12/40

Abstract: A large communications network is linked to a primary terminal and a secondary terminal. The primary polls the secondary whenever it has data to send, and need not poll at any maximum fixed interval. The poll operation sends a sequence of data frames to the secondary, and causes the secondary to return to the primary a sequence of frames containing any data it may have ready. The secondary can only send data to the primary in response to a poll operation; however, the secondary has the capability of sending a uniquely identifiable frame on its own initiative whenever it has data ready to send and has not received a poll. This frame causes the primary to initiate a normal poll even though it has no data ready to send.

公开(公告)号：DE69331180T2

公开(公告)日：2002-08-14

申请号：DE69331180

申请日：1993-09-08

Applicant: IBM

Inventor： BRANDNER JAMES MICHAEL ,  MANULIK ROBERT JOHN ,  MEYER III ARTHUR J ,  SCHREITER MARK EUGENE

IPC: G06F13/00 ,  H04L12/403 ,  H04L12/56 ,  H04L29/06 ,  H04L12/40

Abstract: A large communications network is linked to a primary terminal and a secondary terminal. The primary polls the secondary whenever it has data to send, and need not poll at any maximum fixed interval. The poll operation sends a sequence of data frames to the secondary, and causes the secondary to return to the primary a sequence of frames containing any data it may have ready. The secondary can only send data to the primary in response to a poll operation; however, the secondary has the capability of sending a uniquely identifiable frame on its own initiative whenever it has data ready to send and has not received a poll. This frame causes the primary to initiate a normal poll even though it has no data ready to send.