Wireless A/G Game Adapter |
| |
What is roaming? |
| |
Roaming is the ability of a portable computer to communicate continuously while it and its user are moving freely |
| |
throughout an area greater than that covered by a single access point. Before using the roaming function, the |
| |
user must make sure that the workstation is set to the same channel number used by the access point of the |
| |
dedicated coverage area. |
| |
To achieve true seamless connectivity, the wireless LAN must incorporate a number of different functions. Each |
| |
node and access point, for example, must always acknowledge receipt of each message. Each node must |
| |
maintain contact with the wireless network even when not actually transmitting data. Achieving these functions |
| |
simultaneously requires a dynamic RF networking technology that links access points and nodes. In such a |
| |
system, the user’s end node undertakes a search for the best possible access to the system. First, it evaluates |
| |
such factors as signal strength and quality, as well as the message load currently being carried by each access |
| |
point and the distance of each access point to the wired backbone. Based on that information, the node next |
| |
selects the right access point and registers its address. Communications between end node and host computer |
| |
can then be transmitted up and down the backbone. |
| |
As the user moves on, the end node’s RF transmitter regularly checks the system to determine whether it is in |
| |
touch with the original access point or whether it should seek a new one. When a node no longer receives |
| |
acknowledgment from its original access point, it undertakes a new search. Upon finding a new access point, it |
| |
then |
| |
What is ISM band? | ism band: radio bandwidth utilized in wireless transmissions. | |
The FCC and their counterparts outside of the U.S. have set aside bandwidth for unlicensed use in the ISM | ||
| ||
(Industrial, Scientific and Medical) band. Spectrum in the vicinity of 2.4 GHz, in particular, is being made available |
| |
worldwide. This presents a truly revolutionary opportunity to place convenient |
| |
the hands of users around the globe. |
|
What is Spread Spectrum?
Spread Spectrum technology is a wideband radio frequency technique developed by the military for use in reliable, secure,
spread spectrum: wideband radio frequency technique used for more reliable and secure data transmission.
What is DSSS? What is FHSS? And what are their differences?
Appendix A: Troubleshooting
dsss: Frequency transmission with a redundant bit pattern resulting in a lower probability of information being lost in transit.
39
Frequently Asked Questions