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Radio frequency local area networkRadio frequency local area network description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20090172189, Radio frequency local area network. Brief Patent Description - Full Patent Description - Patent Application Claims
The present application is a continuation in part of a pending application of Meier et al., U.S. Ser. No. 07/769,425, filed Oct. 1, 1991 (Attorney Docket Nos. 91 P 668; DN37882). This application is also a continuation in part of pending PCT application of Mahany et al., Serial No. PCT/US92/08610, filed Oct. 1, 1992 (Attorney Docket Nos. 92 P 661; DN37882Y). The entire disclosures of each of these pending applications including the drawings and appendices are incorporated herein by reference as if set forth fully in this application. In a typical radio data communication system having one or more host computers and multiple RF terminals, communication between a host computer and an RF terminal is provided by one or more base stations. Depending upon the application and the operating conditions, a large number of these base stations may be required to adequately serve the system. For example, a radio data communication system installed in a large factory may require dozens of base stations in order to cover the entire factory floor. In earlier RF (Radio Frequency) data communication systems, the base stations were typically connected directly to a host computer through multi-dropped connections to an Ethernet communication line. To communicate between an RF terminal and a host computer, in such a system, the RF terminal sends data to a base station and the base station passes the data directly to the host computer. Communicating with a host computer through a base station in this manner is commonly known as hopping. These earlier RF data communication systems used a single-hop method of communication. In order to cover a larger area with an RF data communication system and to take advantage of the deregulation of the spread-spectrum radio frequencies, later-developed RF data communication systems are organized into layers of base stations. As in earlier RF data communications systems, a typical system includes multiple base stations which communicate directly with the RF terminals and the host computer. In addition, the system also includes intermediate stations that communicate with the RF terminals, the multiple base stations, and other intermediate stations. In such a system, communication from an RF terminal to a host computer may be achieved, for example, by having the RF terminal send data to an intermediate station, the intermediate station send the data to a base station, and the base station send the data directly to the host computer. Communicating with a host computer through more than one station is commonly known as a multiple-hop communication system. Difficulties often arise in maintaining the integrity of such multiple-hop RF data communication systems. The system must be able to handle both wireless and hard-wired station connections, efficient dynamic routing of data information, RF terminal mobility, and interference from many different sources. The present invention solves many of the problems inherent in a multiple-hop data communication system. The present invention comprises an RF Local-Area Network capable of efficient and dynamic handling of data by routing communications between the RF Terminals and the host computer through a network of intermediate base stations. In one embodiment of the present invention, the RF data communication system contains one or more host computers and multiple gateways, bridges, and RF terminals. Gateways are used to pass messages to and from a host computer and the RF Network. A host port is used to provide a link between the gateway and the host computer. In addition, gateways may include bridging functions and may pass information from one RF terminal to another. Bridges are intermediate relay nodes which repeat data messages. Bridges can repeat data to and from bridges, gateways and RF terminals and are used to extend the range of the gateways. The RF terminals are attached logically to the host computer and use a network formed by a gateway and the bridges to communicate with the host computer. To set up the network, an optimal configuration for conducting network communication spanning tree is created to control the flow of data communication. To aid understanding by providing a more visual description, this configuration is referred to hereafter as a “spanning tree” or “optimal spanning tree”. Specifically, root of the spanning tree are the gateways; the branches are the bridges; and non-bridging stations, such as RF terminals, are the leaves of the tree. Data are sent along the branches of the newly created optimal spanning tree. Nodes in the network use a backward learning technique to route packets along the correct branches. One object of the present invention is to route data efficiently, dynamically, and without looping. Another object of the present invention is to make the routing of the data transparent to the RF terminals. The RF terminals, transmitting data intended for the host computer, are unaffected by the means ultimately used by the RF Network to deliver their data. It is a further object of the present invention for the network to be capable of handling RF terminal mobility and lost nodes with minimal impact on the entire RF data communication system. Continue reading about Radio frequency local area network... Full patent description for Radio frequency local area network Brief Patent Description - Full Patent Description - Patent Application Claims Click on the above for other options relating to this Radio frequency local area network patent application. 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The computer system is comprised of a plurality of server computers networked together in a hub and spoke configuration that defines a hub computer system and at least one spoke computer system, where the hub ... ###  How KEYWORD MONITOR works... a FREE service from FreshPatents1. Sign up (takes 30 seconds). 2. Fill in the keywords to be monitored. 3. Each week you receive an email with patent applications related to your keywords. Start now! - Receive info on patent apps like Radio frequency local area network or other areas of interest. ### Previous Patent Application: Fast path message transfer agent Next Patent Application: System and method for providing latency signatures Industry Class: Electrical computers and digital processing systems: multicomputer data transferring or plural processor synchronization ### FreshPatents.com Support Thank you for viewing the Radio frequency local area network patent info. 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