发明名称 |
Control method and apparatus for a wireless data link |
摘要 |
<p>Methods and apparatus for operating an optical communications system having at least two communicating entities (10,12). In accordance with a method of the invention a first step transmits communication link control information from a first entity to a second entity over a first optical channel having a first data bit rate. Responsive to the transmitted communication link control information, a second step of the method transmits data information from the second entity to the first entity over a second optical channel having a second data bit rate that is greater than the first data bit rate. The first optical channel is preferably a relatively low-bandwidth diffuse transmission infrared radiation channel. The second optical channel is preferably a relatively high-bandwidth infrared channel. One of the entities is a network adapter coupled to a wired network. The network adapter is preferably ceiling mounted. The other entity may be a mobile data processor. A plurality of mobile data processors may be served by one network adapter. <IMAGE> <IMAGE> <IMAGE></p> |
申请公布号 |
EP0483549(B1) |
申请公布日期 |
1996.09.04 |
申请号 |
EP19910117072 |
申请日期 |
1991.10.07 |
申请人 |
INTERNATIONAL BUSINESS MACHINES CORPORATION |
发明人 |
FREITAS, RICHARD FRANCIS;HARRISON, COLIN GEORGE;HORTENSIUS, PETER DIRK |
分类号 |
G06F13/00;H04B10/00;H04B10/10;H04B10/22;(IPC1-7):H04B10/22 |
主分类号 |
G06F13/00 |
代理机构 |
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代理人 |
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主权项 |
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地址 |
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