This standard is designed to support ad hoc networking and multimedia QoS guarantees, where a node may join or leave a group or sub-network, and plays the role of a master or a slave node. The physical layer is similar to 802.11b. The data rates of 11 – 55 Mbps supports high-definition video and high-fidelity audio. It is optimised for short-range transmission – max distance 10 m. It is low cost and allows integration into small consumer devices.
The physical layer requires low power consumption (less than 80 mA) while actively transmitting / receiving data. The beacon contains network specific parameters, such as information for new services to join the network and power management. The beacon is followed by time slots in the contention access period (CAP) that makes use of CSMA/CA.
CAP is for transmission of frames that do not require QoS guarantee. CAP is followed by time slots allocated under the guaranteed time slots (GTS) period. GTS is used for transmission of image files, standard and high-definition video and high-quality audio.
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