Second, IEEE802.11e MAC protocol and QoS mechanisms for the media access control policy IEEE802.11e whole 802.11 MAC protocol that is the improvement and enhancement. Before introducing the 802.11e MAC protocol, the first of the 802.11 MAC protocol produced a brief analysis of the basic machine. 1.IEEE802.11 MAC protocol DCF, PCF access control policy IEEE802.11 MAC protocol [1] defines two operations, the channel contention in the distributed coordination function of channel contention and non-point coordination function period. Which, DCF is the necessary functions, while the PCF by the WLAN device hardware manufacturers to decide whether to implement.
Institute of Information Technology Management International Affairs Griffiths confirmed that Microsoft had talks with Birmingham City Council. He said he did not know Linux Test in Birmingham City Council passed Microsoft gained greater bargaining chips, but other government agencies have successfully used this strategy. Griffiths said that, I can not confirm that Birmingham City Council is the case, but other government agencies to obtain a larger chips. Newham London town is also considered by the pilot deployment of Linux and access to the Microsofts special offers, which denied the claim.