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Channel Selection for 802.11ah

Channel Selection for 802.11ah. Date: 2012-07-16. Slide 1. Authors continued:. Slide 2. Authors continued:. Slide 3. After channelization is done in US and other countries Channel selection rules need to be defined Minimize interference between BSS

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Channel Selection for 802.11ah

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  1. Channel Selection for 802.11ah Date: 2012-07-16 Huai-Rong Shao, et. al. Samsung Electronics Slide 1

  2. Authors continued: Huai-Rong Shao, et. al. Samsung Electronics Slide 2

  3. Authors continued: Huai-Rong Shao, et. al. Samsung Electronics Slide 3

  4. After channelization is done in US and other countries • Channel selection rules need to be defined • Minimize interference between BSS • Maximize the usage of channels for different applications Motivation Huai-Rong Shao, et. al, Samsung Electronics

  5. Problem Statement 902 928 MHz MHz 1 MHz 2 MHz 4 MHz 8 MHz 16 MHz : Channel available : Channel is being used : Channel not available • Among 26 MHz totally, only 4 MHz is being used in the above example • But neither 8 MHz nor 16 MHz channels available, and only three 4 MHz channel available Huai-Rong Shao, et. al, Samsung Electronics Slide 5

  6. Problem Statement 902 928 MHz MHz 1 MHz 2 MHz 4 MHz 8 MHz 16 MHz : Channel available : Channel is being used : Channel not available • If two 1 MHz channels are allocated to other positions • One 16 MHz channel, two 8 MHz channels , and five 4 MHz channels available Huai-Rong Shao, et. al, Samsung Electronics Slide 6

  7. Among all available channels, the new BSS should select a idle channel which can help keep maximum number of idle (available) wider bandwidth channels after it is selected • The selected channel has least overlap with other wider bandwidth channels • Channel availability is decided by channel scanning results • PHY design such as Mask may affect channel availability, for example, interference between adjacent channels Channel selection at BSS setup Huai-Rong Shao, et. al, Samsung Electronics

  8. If adjacent channels are not treated as available from channel scanning results Example of channel selection at BSS setup Choose one from these three if a new 1 MHz BSS needs to be set up 928 MHz 902 MHz 1 MHz 2 MHz 4 MHz 8 MHz 16 MHz : Channel available : Channel is being used : Channel not preferred due to adjacent channel interference : Channel not available Huai-Rong Shao, et. al, Samsung Electronics

  9. If interference between adjacent channels is low Example of channel selection at BSS setup Choose one from these two if a new 1 MHz BSS needs to be set up 928 MHz 902 MHz 1 MHz 2 MHz 4 MHz 8 MHz 16 MHz : Channel available : Channel is being used : Channel not available Huai-Rong Shao, et. al, Samsung Electronics

  10. Channel selection rules need to be defined • Minimize interference between BSS • Maximize the usage of channels for different applications • Channel selection at BSS setup stage • New BSS should select a channel which can help keep maximum number of available wider bandwidth channels Conclusion Huai-Rong Shao, et. al, Samsung Electronics

  11. Do you support to include the following channel selection rule in the 802.11ah specification framework document? • Among all available channels, the new BSS should select an idle channel which can help keep maximum number of idle (available) wider bandwidth channels after it is selected (Details TBD). • Y • N • A Straw Poll Huai-Rong Shao, et. al, Samsung Electronics

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