Chapter 8

Power Management

In this chapter, you will learn about the following:

• 802.11 Power Management
  • Describe the operation of 802.11 Power Management
  • Describe the use of Power Save Poll frames
  • Describe the operation of 802.11e Unscheduled Automatic Power Save Delivery
  • Describe the purpose of Null data frames as it relates to power management.
  • Describe the operation of 802.11n Power Save Multi-Poll

Ask five power users to describe their dream wireless gadget, and you will probably get five different answers. Should it have a nice, spacious screen, or should it fit in your pocket? Should you be able to tap out emails on a keyboard, or is a touch screen a more efficient use of space? Do you want full multitasking, or would you rather have apps stop using the processor once they are closed? The gadget industry is quite subjective in just about every area, save one: battery life. Everyone wants more of it.