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Protocol Architecture of 802.11aq

Protocol Architecture of 802.11aq. Authors:. Date: 2013-09-02. Abstract. This document discuss the solution architecture of 802.11aq. Service Discovery Scenario. Scenario STA can discover the service before association Example:

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Protocol Architecture of 802.11aq

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  1. Protocol Architecture of 802.11aq Authors: Date: 2013-09-02 Dapeng Liu (CMCC)

  2. Abstract This document discuss the solution architecture of 802.11aq. Dapeng Liu (CMCC)

  3. Service Discovery Scenario • Scenario • STA can discover the service before association • Example: • User can use 802.11aq to find the WLAN network that provide printing service in hotel. • Assumption: • Service discovery is performed before association. Dapeng Liu (CMCC)

  4. Proposed Architecture for 802.11aq • Extend 802.11u to support service discovery or • Define a new Service Discovery Protocol? 802.11 Scope Not in Scope of 802.11 STA AP Service Service query protocol ANQP… GAS Probe Extend ANQP or define new service query protocol Up-layer service discovery protocol Dapeng Liu (CMCC)

  5. Proposed Architecture • STA to AP: Pre-association service discovery layer 2 protocol • Extend ANQP or • Define new Service Discovery Protocol • AP to Service Server: • Up layer service discovery protocol • May not in 802.11 scope • For service is provided by STA case is one exception. Dapeng Liu (CMCC)

  6. Extension for Service Discovery • Beacon • Extend beacon to indicate support of service discovery • Example: • In beacon probe request/response message, define service discovery element. • Service Type: define the service type that the WLAN network can provide. • Example: • Printer/VoIP… Element ID Service Type Octet 2 1 Dapeng Liu (CMCC)

  7. Extension for Service Discovery • Service discovery protocol • Define new Service discovery protocol over GAS • Similar with ANQP, query/response protocol • STA can use this protocol to query service before association. • Example: • STA ask: what is the IP address of the printer in this WLAN network? • AP translate this query to up-layer protocol and query the WLAN network. (for example, Bonjour) • The AP get response from the service provider (e.g. printer). • The AP send the query response to the STA, including the printer type and other parameters of the printer. • The AP can cache and set the service type field in the beacon message. Dapeng Liu (CMCC)

  8. Service discovery protocol • Service Type: • The service type provided. • Length: • The length of the service information. • Service Information: • Service information. Printer types and other parameters.. Service Type Length Service Information Octet 2 variable 1 Dapeng Liu (CMCC)

  9. Q&A Dapeng Liu (CMCC)

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