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Interworking – Policy & QoS control. H. Cheng, C.B.Tan, P.Y.Tan Panasonic (WNG-SC) Date : 14 th September 2003. Why Policy is needed for WLAN interworking. Consumer: Services offered by external networks (e.g. 3G network) are accessible via WLAN.

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Interworking policy qos control
Interworking – Policy & QoS control

H. Cheng, C.B.Tan, P.Y.Tan



Date : 14th September 2003

H.Cheng, C.B.Tan, P.Y.Tan, Panasonic

Why policy is needed for wlan interworking
Why Policy is needed for WLAN interworking


  • Services offered by external networks (e.g. 3G network) are accessible via WLAN.

  • Users expect certain levels of service corresponding to their paid subscriptions.

    Network Operator:

  • IEEE 802.11 WLANs potentially offer much greater bandwidth than cellular networks. This potential should be realised by implementing a capability for external networks to control.

  • Allows for more business cases and relationships between operators

  • Provides method for operator to control and enforce user policies in the WLAN.

  • Allows for the differentiation of service levels to subscribers that roam into WLAN.

    Technology & Industry:

  • 3GPP IP-based applications that utilises the 3GPP standard policy architecture, such as IMS with SBLP, can be readily adopted over an interworking WLAN.

  • 3GPP has identified traffic routing as a means of policy control to be enforced by the WLAN.

H.Cheng, C.B.Tan, P.Y.Tan, Panasonic

The way forward for policy
The way forward for policy

  • IEEE 802.11 has provided standards for lower layer functionality such as QoS control (.11e). There has been no standard method to interface and operate these controls.

  • A unified policy interface needs to be provided to external network (e.g. 3G network).

  • For example, information passed over this policy interface could be mapped onto 802.11e mechanisms.

  • Need to fully align with other WLAN interworking standards, for example 3GPP, 3GPP2, GSMA.

H.Cheng, C.B.Tan, P.Y.Tan, Panasonic

The work for the wng
The work for the WNG

  • To define an architecture for policy control for interworking with external networks.

  • To develop a policy enforcement mechanism that is common for all interworking IEEE 802.11 WLANs.

  • To define the information/parameter flow over the policy control interface.

  • To extend existing mechanisms for interworking

    • E.g. consider EDCA or HCCA for IEEE 802.11e, where EDCA has a defined mapping from upper layer priority, but interworking with HCCA hasn’t been specified.

H.Cheng, C.B.Tan, P.Y.Tan, Panasonic