1. 1 ISO/IEC 20587 - VHN (Versatile Home Network) Real Time Systems Lab. Myung Jin, Lee [Reference] ISO/IEC JTC 1/SC 25 WG 1 N1140a - Interconnection of Information Technology Equipment

2. 2 Agenda  Overview  Network Scope and Components of VHN  Protocol Stack of VHN

3. 3 What is ISO/IEC 20587 ?  This standard defines an IP-enabled network for connecting cluster networks to a whole-home broadband distribution backbone  in order to facilitate integrated operation of appliances and networked components  VHN (Versatile Home Network)  The distribution network is based on IEEE1394  This network will accommodate Ethernet as an attached network via a bridge, and directly with the introduction of IEEE1394c  This network provides a flexible and open network architecture and communications protocol specification for digital devices in the home

4. 4 [VHN] Characteristics  Allows the transfer of information among all connected digital devices in the home, either as directly connected and devices or as part of a cluster network  Allows interoperability between devices on different cluster networks in the home, including low bandwidth networks and high bandwidth networks.  Provides a common interface to Residential Gateways that connect devices in the home to access networks.  Provides user-to-device control  Provides device-to-device control  Provides home network management for devices and applications

5. 5 [VHN] Service Applications  Entertainment Services  Distribution of video, audio, and video games  Control of audio/video (A/V) devices such as TVs, VCRs, and set-top boxes  Communication Services  Voice telephony (wired and wireless), video telephony, video conferencing, distance learning, and remote access to corporate networks  Information Services  Internet access, on-line service access, PC file and printer sharing, news and information on demand, home shopping, and home banking  Home Automation Services  Lighting, appliance control, energy management, comfort control, and premises security

6. 6 [VHN] Network Scope  A backbone network  One or more component networks  A number of access devices that connect the home network to external access networks  A number of network devices that connect component networks to the home backbone network  End devices that provide various functional services to the home user

7. 7 [VHN] Abstract Network Components  Key Components  End Devices  Component Networks  Backbone-Component Interface  Access-Backbone Interface and Access- Component Interface

8. 8 [VHN] Components (1/2)  End Devices  Digital Device connected to the home network that provides some utility (other than network service)  Example) printer, television, audio speaker, security sensor, HVAC (Heating, Ventilating, and Air-Conditioning) controller  Component Networks  Enable the several devices connected to them to communicate with each other  Connected to the backbone through a backbone-component interface  The choice of a component network for a particular device is dictated by the communication needs and cost points of the device  Example) IEEE1394, Ethernet, HomePNA, X-10, Powerline CEBus, and RF Wireless LAN

9. 9 [VHN] Components (2/2)  Backbone-Component Interface  An element that provides network services to end devices  Example) repeater, bridge, router, network management station, any device that implements such a function (e.g., a personal computer)  Access-Backbone Interface and Access-Component Interface  An access-backbone interface connects an external access network to the home network  Access-component interfaces connect to a component interface through which a connection is made to the home network backbone  Example) POTS modem, xDSL adapter, cable modem, DBS (satellite TV service) decoder, Residential Gateway  Cf) ISO/IEC 15045, “Residential Gateway”, defines a standard residential gateway

10. 10 [VHN] Physical Media  Unshielded twisted-pair (UTP) cabling  CAT-5 UTP cable  Glass optical fiber (GOF)  50/125-um multimode fiber  Plastic optical fiber (POF)  More excellent optical performance than GOF  IEEE1394b  Contained in ISO/IEC 15018

11. 11 [VHN] Protocol Stack

12. 12 Summary  VHN (Versatile Home Network)  This network provides a flexible and open network architecture and communications protocol specification for digital devices in the home  Configuration  Backbone network : IEEE1394  IP based network layer  UPnP based middleware  Optionally CORBA based middleware optionally  Multimedia service part optionally

13. 13 Work Progress

14. 14 Progress  AV1394 Board  Complete  Encode/Decode Mode Operation  On Working  Code analysis for implementing the repository replication  External host interface : serial interface, 8bit parallel interface  Preparing for second PCB version  Board repair (2ea)

15. 15 Upgrade Version of AV1394 Board

16. 16 Check Point  What’s the backbone network at current time ?  Optical Fiber or Wireless network is needed.  IEEE1394 (max. 800Mb)  Hard to configure and interoperate the backbone network and sub-network (IEEE1394.1, IEEE1394.3)  Not easy to handle the operations at reset status  IEEE1394 bridge : NEC’s PortalGear (’99, not commercial product)  Gigabit Ethernet (max. 1000Mb)  Hard to manage and control the burst streaming data  UWB (Ultra Wide Band) (max. 480Mb)  Consideration about the routing service  Distance restriction (about 10m)  Multimedia Streaming Service  Trans-conversion among several compression types (ex. H.264, MPEG-4, H.263, MPEG-2, MLJPEG, DV, etc.)  NxN multicast and broadcast data transmission at the same time

17. 17 Q/A