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Course Overview

This course is designed to meet the needs of wireless network professionals responsible for deploying and troubleshooting 802.11/802.11n (Wi-Fi) wireless networks. A wide variety of topics are covered in great detail in this training. We will look at "Challenges addressed by 802.11n" as well as "Challenges caused by 802.11n". This course goes through commonly-implemented 802.11n PHY and MAC layer enhancements.There are a variety of 802.11n coexistence - also called protection - mechanisms, and this course goes through all of the options that are currently implemented and that are likely to be implemented in the near future.Implementing an 802.11n network involves a long list of challenges and deployment considerations on both the client and infrastructure sides. These considerations are treated in this training.

Who should attend:

This course is designed for individuals responsible for the design, implementation of 802.11 and the most promising technology 802.11n.



Course Contents

Course content includes:

1) Introduction
2) Understand 802.11n Key Technology pieces

2.1) Techniques for high-throughput PHY

  • High Throughput PHY: MIMO
  • High throughput PHY: transmit beamforming (TxBF)
  • MIMO, SDM, beamforming… terminology and techniques
  • 802.11n MIMO configurations and terminology
  • High Throughput PHY: 40 MHz channels
  • High Throughput PHY: Shorter guard interval
  • High Throughput PHY: More subcarriers
  • High Throughput PHY: New Modulation Rates
  • High Throughput PHY: Duplicate format

2.2) Techniques to enhance the MAC

  • MAC layer enhancements: Frame aggregation
  • MAC layer enhancements: Multiple Traffic ID Block Acknowledgement (MTBA
  • MAC layer enhancements: Reduced inter-frame spacing (RIFS)
  • MAC layer enhancements: Spatial multiplexing power save (SM power save)
  • MAC layer enhancements: Power Save Multi-poll (PSMP)

2.3) Compatibility Modes and Legacy Support in 802.11n

  • Phased coexistence Operation (PCO)
  • Other mechanisms for coexistence: Dual-CTS protection (CTS-to-self)
  • Other mechanisms for coexistence: 40 MHz-intolerant indication
  • Using 802.11n in the 2.4 GHz band

2.4) Migration strategies

  • Different paths to enterprise-wide 802.11n
  • Greenfield
  • AP-overlay
  • AP substitution
  • Other considerations when planning an upgrade

3) Labs: The following topics are covered in a series of Labs:

  • How to find out 802.11n features on an AP?
  • What 802.11n features are NOT used on an AP or STA?
  • What happens If a particular 802.11nfeature is (Not) used?
  • How much traffic is sent using 40-MHz channel width?
  • What channel settings should I use If I have a new AP?
  • How to find out the maximum throughput of an installed AP?
  • Why am I NOT getting the expected throughput from an AP?
  • What is the expected device throughput for an AP?
  • What should be taken into consideration when configuring new APs?
  • What change in network throughput is expected when deploying new APs and/or STAs on the network?
  • How to find out the network throughput between an AP and a STA?
  • How can I know if my 802.11n AP is associated with any legacy devices?
  • How much overhead does an 802.11n AP sse to support legacy devices?
  • How will associated legacy devices decrease 802.11n device throughput?
  • How many legacy APs can be added to an 802.11nnetwork?
  • How will 802.11n STAs affect an existing 802.11a network?