1. doc.: IEEE 802.15-06/286r3 Submission July, 2006 Noriyasu Kikuchi, Oki Electric Industry Co., Ltd.Slide 1 Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [Oki Response to request of Usage Models] Date Submitted: [15 July, 2006] Source: [Tadahiko Maeda, Hideto Ikeda, Noriyasu Kikuchi, Kiyohito Tokuda] Company [Oki Electric Industry Co., Ltd.] Address [3-4 Hikari-no-oka, Yokosuka-shi, Kanagawa, 239-0847, Japan] Voice:[+81-46-847-5141], E-Mail:[maeda097@oki.com, ikeda637@oki.com, kikuchi434@oki.com, tokuda315@oki.com] Re: [Request of contributions for Usage Models for UMD subgroup] Abstract:[Proposal of Usage Model] Purpose:[To be adapted in 15.3c Usage Model Document] Notice:This document has been prepared to assist the IEEE P802.15. It is offered as a basis for discussion and is not binding on the contributing individual(s) or organization(s). The material in this document is subject to change in form and content after further study. The contributor(s) reserve(s) the right to add, amend or withdraw material contained herein. Release:The contributor acknowledges and accepts that this contribution becomes the property of IEEE and may be made publicly available by P802.15.

2. doc.: IEEE 802.15-06/286r3 Submission July, 2006 Noriyasu Kikuchi, Oki Electric Industry Co., Ltd.Slide 2 Proposed Usage Model Hideto Ikeda Noriyasu Kikuchi Kiyohito Tokuda Oki Electric Industry Co., Ltd.

3. doc.: IEEE 802.15-06/286r3 Submission July, 2006 Noriyasu Kikuchi, Oki Electric Industry Co., Ltd.Slide 3 Wireless Home Video Network Home Video Server （ Home Gateway ） HD TV Set (DEV1) Laptop PC (DEV2) Portable Device (DEV5) Camcorder (DEV3) Room1 Room2 Room3 U1’ U4” U9’ U4’ Corridor HD TV Set (DEV4) U4’ Repeater U4’ × 2,U4”, U9’ U9’ U4’ Repeater device: A device to extend links between source and destination devices It might have multiple mode transceivers that operate on different channels. Outside Line (Internet) Repeater U4”

4. doc.: IEEE 802.15-06/286r3 Submission July, 2006 Noriyasu Kikuchi, Oki Electric Industry Co., Ltd.Slide 4 Usage Model Covers Use Cases Application mix Residential (Wireless Home Video Network) U1(U1’), U4(U4’&U4”), U9(U9’ ) (LOS for all) ・ Server x1: Fixed ・ DEV1: uncompressed HDTV(A1), Fixed ・ DEV2 & 3: compressed HDTV(A1), Portable ・ DEV4: compressed HDTV(A1), Fixed ・ DEV5: contents download(A2), Portable Comments: ・ A server streams uncompressed and compressed HD video to DEVs in the same room and other rooms. ・ A server also works as a download/upload server to/from portable devices. ・ Some repeater devices are located to extend service areas over the wall in a house. ・ Right positioning of the repeater device can ensure steady LOS conditions.

5. doc.: IEEE 802.15-06/286r3 Submission July, 2006 Noriyasu Kikuchi, Oki Electric Industry Co., Ltd.Slide 5 Involved Use Cases U#explanationApplicationEnvironmentSeparationSightMotion U1’A variation of U1 with LOS Uncompressed HDTV (A1) Residentialless than 5mLOSFixed U4’A variation of U4 with a longer separation Compressed HDTV (A1) Residentialless than 5mLOSFixed during streaming U4”A variation of U4’ with fixed receiver Compressed HDTV (A1) Residentialless than 5mLOSFixed U9’A variation of U9 with a longer separation File Transfer (A2) Residentialless than 5mLOSFixed during streaming Note: Regarding all Use Cases above, the original Use case # is modified because of condition utilizing the repeater devices. We consider max. 5 meter of link separation is adequate for indoor home use, and use of repeater devices in case of more than 5 meter separation.

6. doc.: IEEE 802.15-06/286r3 Submission July, 2006 Noriyasu Kikuchi, Oki Electric Industry Co., Ltd.Slide 6 Background Audio/Video transmissions are considered as promising 60 GHz mmWave applications for home users. Users have many AV equipments (TV set, PVR, Camcorder, etc) spread in several rooms. Family members can use them in individual rooms simultaneously. Video sources can also be distributed and some come from outside home, e.g. through the Internet, CATV, TV broadcasts. Current trend is integrated digital living environments. One solution is that one central home video server distributes video contents, which may be stored in it or come through it, to all rooms in a house. Repeater devices are essential for these wireless systems.

7. doc.: IEEE 802.15-06/286r3 Submission July, 2006 Noriyasu Kikuchi, Oki Electric Industry Co., Ltd.Slide 7 Applications in the System Two classes of applications –Real-time HD video streaming applications Compressed (MPEG-2, 1080i): 24 Mbps (typical) Uncompressed (HDMI, 1080i): 2.2 Gbps –Non real-time or interactive applications Huge file download/upload WEB surfing –Both work on gigabit Ethernet Throughput is limited mainly by the performance of equipments –For example, throughput of the typical note PC may be limited less than 100 Mbps due to HDD transferring speed.

8. doc.: IEEE 802.15-06/286r3 Submission July, 2006 Noriyasu Kikuchi, Oki Electric Industry Co., Ltd.Slide 8 Traffic Assume a following scenario; –4 members of a family enjoy video services in each room or a family room. –Each gets an HDTV streaming simultaneously from the same server either in a compressed format or uncompressed format. –On watching TV, each may downloads/upload video contents from/to the server. –Total traffic of eight applications ( 2 applications for 4 persons) is estimated around 500 Mbps (24M x 4 + 100M x 4) at the end of the server. –If an uncompressed video application operates in addition, total throughput becomes 2.7 Gbps (2.2G + 500M).

9. doc.: IEEE 802.15-06/286r3 Submission July, 2006 Noriyasu Kikuchi, Oki Electric Industry Co., Ltd.Slide 9 Repeater Repeater device is to extend or bridge a service area of the network. It might have multiple mode transceivers that operate on different channels to maintain total throughput high. –If N segment links in a home network share one channel time, its effective throughput is reduced to 1/N. –For example, a chain of seven repeaters links may divide a network into eight segments. It means that 3 Gbps PHY can support only as small as 375 Mbps of throughput.

10. doc.: IEEE 802.15-06/286r3 Submission July, 2006 Noriyasu Kikuchi, Oki Electric Industry Co., Ltd.Slide 10 Conclusion We suggested a usage model as "Wireless Home Video Network". In the network, many devices communicate with one central server simultaneously. Repeater devices can extend each link of devices, and can connect remote rooms beyond walls. Repeater devices can ensure steady LOS condition.