Infrastructure for wireless LANs
First Claim
1. In a wireless data communications system wherein data communications are provided between mobile units and a central computer via access points, the improvement wherein at least some of said access points are connected to said computer through at least one data switching hub, and wherein said data switching hub is arranged to selectively provide data communications to access points connected to said hub in accordance with destination address data in said communications.
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Accused Products
Abstract
A wireless data communications system includes simplified access points which are connected to ports of an intelligent switching hub. The switching hub relays data packets to the access points in accordance with destination address data in the data communications. In a preferred arrangement the access points are provided with power over the data cable from the switching hub location.
119 Citations
18 Claims
- 1. In a wireless data communications system wherein data communications are provided between mobile units and a central computer via access points, the improvement wherein at least some of said access points are connected to said computer through at least one data switching hub, and wherein said data switching hub is arranged to selectively provide data communications to access points connected to said hub in accordance with destination address data in said communications.
- 3. An access point for use in a wireless data communications system wherein access points in radio data communications with mobile units are connected to at least one data switching hub for selectively providing data communications to said access points, comprising a transmitter/receiver for providing said radio data communication with said mobile units, a data interface for providing data communication with said switching hub over a cable, a processor for coupling data between said data interface and said transmitter/receiver and a power supply for receiving operating power from said cable and providing power to said interface, said processor and said transmitter/receiver.
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8. A method for providing data communications between mobile units and a central computer comprising:
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connecting said central computer to at least one switching hub over a wired data communications network;
connecting a plurality of access points to ports of said switching hub;
associating mobile units with selected ones of said access points;
providing data communications packets on said wired communications network, said packets including destination addresses;
maintaining a routing list at said switching hub relating said ports to said access points and to said mobile units associated with said access points;
operating said switching hub to relay data communications packets from said wired data communications network to said access points in accordance with said routing list; and
relaying data communications received from said switching hub by said access points to associated mobile units by radio communications. - View Dependent Claims (9, 10, 11)
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12. A method as specified in clam 10 wherein said mobile units are arranged to associate with one of said access points for radio data communications therewith, and wherein said access points are arranged to send a data communications to said switching hub, when a mobile unit becomes newly associated with said access point, said message having a source address corresponding to said newly associated mobile unit and causing said switching hub to update said routing list with the address of said mobile unit.
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13. A data communications system for providing data communications between at least one computer and a plurality of mobile units, comprising:
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a plurality of access points, each arranged for providing radio data communications and having a wired data interface;
a plurality of mobile units, each arranged to associate itself with one of said access points and conduct radio data communications therewith;
at least one switching hub having a first wird data port and a plurality of additional wired data ports, each connected to said wired data interface of one of said access points; and
a wired data communications network for providing wired data communications between said at least one computer and said first wired port of said switching hub. - View Dependent Claims (14, 15, 16, 17)
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18. In a wireless data communications system wherein there are provided access points for interconnecting mobile units in radio communications with said access points and a wired data communications network, the improvement wherein at least some of said access points are supplied with power using data communications cables of said wired data communications network.
Specification