The QoS functions in 802.11n are substantially improved from those in the original 802.11e standard, and also take into account the needs of VoIP handsets. In addition there are a number of efficiency improvements in the the protocol that should allow more of the available PHY data rate to be utlilized than in the legacy 802.11a/g devices, which is a benefit for enterprises that require higher infrastructure capacity. Finally the transmit beamforming option permits lower interference levels (and improves rejection of existing interference), which will be a benefit to enterprises that have dense AP deployments and have to cope with adjacent WLANS belonging to other entities.