The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Aug. 10, 1993
Filed:
Aug. 13, 1991
Ting D Cheng, Mahopac, NY (US);
Peter A Franaszek, Katonah, NY (US);
Christos J Georgiou, White Plains, NY (US);
Gregory M Nordstrom, Oronoco, MN (US);
Thomas K Philips, Hopewell Junction, NY (US);
Martin W Sachs, Westport, CT (US);
Anujan M Varma, Santa Cruz, CA (US);
Thomas M Walker, Rochester, MN (US);
International Business Machines Corporation, Armonk, NY (US);
Abstract
Dynamic switch protocols are implemented on a token bus protocol in a shared medium network to improve the basic token bus functional capabilities and link utilization, and to produce a uniform transaction protocol that supports both token bus and dynamic switch networks. Frame formats common to both token bus and dynamic switch protocols are utilized, and circuit switched protocols are superimposed on a token bus protocol in interlocked and data transmissions to establish a circuit switched path between a token holder sender node and a destination node. An initial frame transmission uses a normal link header and establishes the circuit switched path between the sender node and the destination node. Subsequent data frames contain no link header information, thereby improving transmission efficiency, and the last frame in such a transmission disconnects the switched circuit path, thereby allowing other transmissions to resume. The use of circuit switched protocols within a token bus protocol allows more general transmission sequences and improves the utilization of token bus bandwidth.