doc.: IEEE /310r0 Submission C. Ware, et.al, Motorola Slide 1 May 2002 Requirements for Home Networking Chris Ware, Eryk Dutkiewicz, Alistair Buttar Marc de Courville, Sebastien Simoens Motorola Contact:

doc.: IEEE /310r0 Submission C. Ware, et.al, Motorola Slide 2 May 2002 Overview Current WLAN environment Home Network environment Requirements for NG – MAC MAC/PHY Zero Configuration How should WNG contribute to the development of

doc.: IEEE /310r0 Submission C. Ware, et.al, Motorola Slide 3 May 2002 WLAN Application Environment Many new WLAN applications are currently being proposed and developed One significant area is the Home Network Can WNG produce a PHY/MAC combination that is flexible, extensible and suitable for use in a future home network?

doc.: IEEE /310r0 Submission C. Ware, et.al, Motorola Slide 4 May 2002 The Home Network 1/2 Three types of home network: –Low bandwidth (command and control) –High bandwidth without QoS (Basic data) –High bandwidth with QoS (Multimedia / Entertainment) Characteristics: –Many different types of devices –Guaranteed service levels required Home networks will be installed by consumers not technicians –Easy to install, maintain and use –Must support large, not-trivial topologies including multiple wireless hops

doc.: IEEE /310r0 Submission C. Ware, et.al, Motorola Slide 5 May 2002 Example Home Network 1394 DVD and HDTV / Display Audio Jukebox Web Tablet 100BaseT Broadband Home Gateway – Cable / xDSL / Satelite a+e+g AP Home Plug Printer Laptop

doc.: IEEE /310r0 Submission C. Ware, et.al, Motorola Slide 6 May 2002 The Home Network 2/ will be one of many technologies in the home –E.g. HomePlug, Ethernet, 1394, HomePNA, BT, x –Each has different transmission rates, QoS mechanisms, target applications etc. HDR will allow many new application opportunities in the home Co-existence (fairness, efficiency) mechanisms with existing and future wireless standards will be required

doc.: IEEE /310r0 Submission C. Ware, et.al, Motorola Slide 7 May 2002 MAC Requirements for High Rate PHY Scalability –Increasing bandwidth applications –Higher rate PHY requires a more efficient MAC Current MAC has large overhead Integration of QoS has not been settled –Higher frequency PHY smaller cell size Multiple Hops –Efficient channel access mechanism to support multiple hop networks –QoS in multihop scenarios

doc.: IEEE /310r0 Submission C. Ware, et.al, Motorola Slide 8 May 2002 MAC Requirements for High Rate PHY Hybrid ARQ –A tighter integration of MAC and PHY « see 02/XXX » –HARQ can be combined with Link Adaptation –An optimized MAC can take advantage of HARQ –Memory requirements in STA need to be optimized A TDD/TDMA approach seems appealing –Enables simpler QoS –Isochronous stream support –Challenge is to be able to combine centralized TDD/TDMA scheme with a multihop network while preserving QoS

doc.: IEEE /310r0 Submission C. Ware, et.al, Motorola Slide 9 May 2002 MAC/PHY Requirements for Zeroconf Zeroconf comprises two areas –MAC/PHY –Network and above Higher layer Zeroconf is addressed by IETF –However, there are Zeroconf issues for the MAC/PHY to consider MAC/PHY Zeroconf requires effective RF management techniques –Network detection –RF Interference management (Automatic Frequency Planning) –How does my WLAN interact with my neighbors? Zeroconf security is also an important issue –The home user should not be forced to worry about MAC layer security issues

doc.: IEEE /310r0 Submission C. Ware, et.al, Motorola Slide 10 May 2002 Conclusion PHY and MAC must be upgraded in parallel to obtain the most out of HDR –The current MAC is not well equipped to exploit the very high bandwidth HDR will provide WNG should lead to a MAC-NG as well as HDR-PHY Issues for MAC-NG: –Overlapped BSS, RF Management –Scalability, efficiency, tighter PHY integration, multihop QoS –Support for Isochronous streams –Zero configuration –Security We believe TDD/TDMA is the way to go