With the characteristics of simple system architecture, low cost and small power consuming, Impulse Radio (IR) Ultra Wideband (UWB) technology becomes popular in recent years. IR-UWB is the same with very short distance wireless network. But existing ralph lauren polo shirts networks and studies always adopt center-controlled architecture. However, the studies on Lacoste Polo Shirts network with distributive architecture are rarely, so more studies need to be taken on the wireless access control and channel resources sharing of distributive architecture network. All the existing MAC protocols, neither IEEE 802.11 which applied to Cheap Lacoste Polo Shirts nor Lacoste Polo Shirts which applied to chi straightener, can not use wireless channel resources efficiently. Based on the physical characteristics of UWB, it's important to design a more optimum UWB distributive architecture polo shirts protocols, which can optimize channel resources allocation and improve throughput with low cost.In view of above issues, this paper point out the differences between IR-UWB, DS-UWB and MB-OFDM UWB, and analyses their advantages and disadvantages. Finally, based on the IR-UWB of simple architecture, low cost, Analyzing the UWB MAC designing principle and functions, and including multi channels access, resource sharing, and access control administration and so on.
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