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:
Dec. 21, 1999
Filed:
Apr. 28, 1993
Arthur Bernard Coleman, Fremont, CA (US);
Linh Tien Truong, San Jose, CA (US);
Juan Grau, Jr, San Mateo, CA (US);
Proxim, Inc., Mountain View, CA (US);
Abstract
Roaming capability is provided to mobile computers within a standard network such as a Novell network. In a computer network running under a network operating system that provides for fault-tolerant internet routing of network communications between nodes and requires that network ID of a node remain constant for the duration of session, the nodes include multiple mobile computing devices wirelessly connected to the network. The mobile computing devices are provided with the capability to roam during a session by changing access points to the network. This capability is provided by programming the mobile computing devices so as to appear to the network as routers able to change access points during a session. The routers connect one sub-net to one other sub-net, the one sub-net being connected to a mobile computing device and having a fixed network ID and the other sub-net, through fault-tolerant internet routing being connected to a selectable access point and therefore having a variable network ID. The resulting workstation/routers may be termed virtual routers in that they connect a purely logical sub-net having a fixed network ID but no physical instantiation to exactly one other sub-net.