Joint Rate and Channel Width Adaptation for 802.11 MIMO Wireless Networks
The emergence of MIMO antennas and channel bonding in 802.11n wireless networks has resulted in a huge leap in capacity compared with legacy 802.11 systems. This leap, however, adds complexity to selecting the right transmission rate. Not only does the appropriate data rate need to be selected, but also the MIMO transmission technique (e.g., spatial diversity or spatial multiplexing), the number of streams, and the channel width. Incorporating these features into a Rate Adaptation (RA) solution requires a new set of rules to accurately evaluate channel conditions and select the appropriate transmission setting with minimal overhead.