IEEE 802.21 MEDIA INDEPENDENT HANDOVER DCN: 21-10-0015-00-0000 Title: Discussion of HWN SG Scope Date Submitted: 01/12/2010 Authors or Source(s): Johannes Lessmann (NEC) Christian Niephaus (Fraunhofer Institute) Antonio de la Oliva (UC3M) Abstract: Material for discussing the final scope of the Heterogeneous Wireless Networks Management SG 21-09-0071-00-0000

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Architectural Issues Discuss some concepts: Need of an Interface notion Need of changes in the definition of Link Multicast Link_ID How do you work with an interface having several links MN centric view vs. peer-to-peer view

General Areas of Interest Getting/Setting interface capabilities (local or remote) Media independent capacity definition Monitoring Capacity constrained HO

Getting Interface Capabilities Define a Mechanism to obtain the capabilities of an interface, at MAC/PHY level Scheduling Deterministic vs. probabilistic Algorithm number of supported (hardware) queues native multicast or not forwarding behavior (ARQ vs. FEC, …) “QoS characteristics”? Supported tx levels, MCSs, channels, … Store this information in the MIIS

Setting Interface Capabilities Primitives enabling the configuration of interfaces Supported tx levels, MCSs, channels, … Possibly power saving configuration (MRPM) Remote configuration of interfaces allow for fast reconfiguration in the network

Media Independent Capacity Metric How do we know, in a media independent way, the remaining capacity of a wireless link? How can we define in the current specification that several stations are in the same capacity domain? Thus, we need a shared resource concept for 802.21

Monitoring Extend monitoring capabilities of 802.21 Currently 802.21 uses media dependent monitoring, can this be done in a media independent way? Should we still use placeholder functions? Reuse/Adapt 3GPP (or other) templates for reporting measurements? Per-flow metering?

Resource-Constrained HO 802.21 considers the bottleneck to be in the access network (e.g. between AP and STA) What happens if the constraint is in the backhaul? Granularity problem: right now there is no way of working with several flows individually, need to HO the complete set of flows managed by a station