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CID#102 - Channel Allocation

CID#102 - Channel Allocation. Date: 2008-01-14. Authors:. Slide 1. Abstract.

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CID#102 - Channel Allocation

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  1. CID#102 - Channel Allocation Date: 2008-01-14 Authors: Slide 1 Emily Qi (Intel Corp) et al

  2. Abstract This document provides an outline for channel allocation normative text proposal (08/0048r1) in support of the channel/frequency allocation for non-802.11-infrastructure networking (IBSS, Mesh, Bluetooth, etc...) or other uses. This presentation provides comment resolution for LB108 CID #102. Slide 2 Emily Qi (Intel Corp) et al

  3. Agenda • Motivation • Proposed Solution • Protocol Details • Review the normative text, see 08/0048r1 Slide 3 Emily Qi (Intel Corp) et al

  4. Motivation • In general, a non-802.11-infrastructurenetwork (e.g. IBSS, one-hop Mesh, or Bluetooth) can co-exist with an infrastructure network • The channel/frequency number that is selected by a non-802.11-infrastructure network is critical to the overall WiFi network performance • Guidance from the infrastructure on channel/frequency allocation for non-802.11-infrastructure network can facilitate better network coexistence and improve overall network performance: • Coordinated channel planning • Reduce radio interference • Balance traffic load Slide 4 Emily Qi (Intel Corp) et al

  5. Usage Scenario: IBSS or one-hop Mesh • Without the guidance from infrastructure, a non-AP STA may choose a non-ideal channel to start an IBSS or a mesh network • Operation of the IBSS or the mesh network can interfere with the operation of infrastructure network Wired Infrastructure AP Channel 1 BSS = Basic Service Set AP Channel 11 STA STA STA STA STA STA STA IBSS or Mesh STA STA Emily Qi (Intel Corp) et al

  6. Problem: BT can interfere with 802.11 channels in use With guidance from the infrastructure it is possible to instruct the STA to use “safer” frequencies for use by BT. Usage scenario: Bluetooth Before Channel 1 AP BT Frequency 802.11 BT Headset Dual Mode STA Channel/Frequency Separation After Channel 1 AP BT Frequency 802.11 BT Headset Dual Mode STA Emily Qi (Intel Corp) et al

  7. Proposed Solution • Introducing Channel Allocation IE • Provide recommended channel/frequency lists for different use cases • Allow flexibility for multiple applications and extensibility for future use cases • Non-AP STA can request channel allocation information with or without having to associate to the infrastructure network • Upon the receipt of the Channel Allocation information, Non-AP STA should operate the corresponding network at the recommended channel/frequency lists. • AP provides Channel Allocation information to the STA • The AP provides a frequency list that either IT recommended or the network infrastructure examined based on the interference level, traffic load or supported regulatory classes. Slide 7 Emily Qi (Intel Corp) et al

  8. Channel Allocation: Request and Response • Define a capability bit in the Extended Capability IE: Channel Allocation • Non-AP STA or AP can request or respond Channel Allocation information via Probe Request and Response frames • Allow unassociated STA to request Channel Allocation information before initiating a non-802.11-infrasture network • Non-AP STA or AP can request or respond Channel Allocation information via the Channel Allocation Request and Response frames – Public Action frame • Allow associated STA to request Channel Allocation information in a protected manner • Allow AP to update Channel Allocation information for both associated and unassociated STAs Slide 8 Emily Qi (Intel Corp) et al

  9. Channel Allocation information Channel Allocation IE format : Channel Allocation sub-element types and usages One or more sub-elements to indicate channel/frequency numbers allocated for the corresponding use cases specified in the Sub-element ID field Sub-element ID is the only field included in the sub-element if the Channel Allocation IE is included in the request frames. Additional sub-element can be defined when more use cases are discovered Emily Qi (Intel Corp) et al

  10. Examples of Channel Allocation Sub-elements 802.11 Non-infrastructure Sub-element: Bluetooth Sub-element: Zigbee Sub-element: Emily Qi (Intel Corp) et al

  11. Channel Allocation Request/Response frames Channel Allocation Request: Channel Allocation Response: • AP can send a Channel Response frame in response to the Channel Allocation Request frame , or AP can also send an unsolicited Channel Allocation Response when AP needs to update Channel Allocation Information Emily Qi (Intel Corp) et al Slide 11

  12. Thank You! and Questions? Slide 12 Emily Qi (Intel Corp) et al

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