Concept Guide

374 | Hotspot Profiles Dell Networking W-Series Instant 6.5.1.0-4.3.1.0 | User Guide
A W-IAP can include its SP Organization Identifier (OI) indicating the identity of the SP in beacons and probe
responses to clients. When a client recognizes a W-IAP's OI, it attempts to associate to that W-IAP using the
security credentials corresponding to that SP. If the client does not recognize the AP’s OI, the client sends a
Generic Advertisement Service (GAS) query to the W-IAP to request more information about the network
before associating. A client transmits a GAS Query using a GAS Initial Request frame and the W-IAP provides
the query response or information on how to receive the query response in a GAS Initial Response frame. To
transmit a GAS query for any advertisement protocol, the advertisement protocol ID must include the
advertisement protocol information element (IE) with details of the advertisement protocol and its
corresponding advertisement control.
Access Network Query Protocol (ANQP)
ANQP provides a range of information, such as IP address type and availability, roaming partners accessible
through a hotspot, and the Extensible Authentication Protocol (EAP) method supported for authentication, for
a query and response protocol. The ANQP Information Elements (IEs) provide additional data that can be sent
from a W-IAP to the client to identify the W-IAP's network and service provider. If a client requests this
information through a GAS query, the hotspot W-IAP sends the ANQP capability list in the GAS Initial Response
frame indicating support for the following IEs:
l Venue Name
l Domain Name
l Network Authentication Type
l Roaming Consortium List
l Network Access Identifier Realm
l 3GPP Cellular Network Data
l IP Address Availability
Hotspot 2.0 Query Protocol (H2QP)
The H2QPprofiles provide a range of information on Hotspot 2.0 elements such as hotspot protocol and port,
operating-class, operator names, WAN status, and uplink and downlink metrics.
Information Elements (IEs) and Management Frames
The Hotspot 2.0 configuration supports the following IEs:
l Interworking IE—Provides information about the Interworking service capabilities such as the Internet
availability in a specific service provider network.
l Advertisement Protocol IE—Provides information about the advertisement protocol that a client can use
for communication with the advertisement servers in a network.
l Roaming Consortium IE—Provides information about the service provider network for roaming clients,
which can be used to authenticate with the W-IAP.
The IEs are included in the following Management Frames when 802.11u is enabled:
l Beacon Frame
l Probe Request Frame
l Probe Response frame
l Association Request
l Re-Association request