1. June, 2006
doc.: IEEE /xxxr0
June, 2006
Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [Oki Response to request of Usage Models]
Date Submitted: [28 June, 2006]
Source: [Tadahiko Maeda] Company [Oki Electric Industry Co., Ltd.]
Address [3-4 Hikari-no-oka, Yokosuka-shi, Kanagawa, , Japan]
Voice:[ ],
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 P 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 P
Tadahiko Maeda, Oki Electric Industry Co., Ltd.
Tadahiko Maeda, Oki Electric Industry Co., Ltd.

2. Tadahiko Maeda Oki Electric Industry Co., Ltd.
June, 2006
Proposed Usage Model
Tadahiko Maeda
Oki Electric Industry Co., Ltd.
Tadahiko Maeda, Oki Electric Industry Co., Ltd.

3. Wireless Home Video Network
June, 2006
doc.: IEEE /xxxr0
June, 2006
Wireless Home Video Network
Internet
Room1
Home Gateway (Home Video Server) U1
U4’,U4”,U9
U4’
HD TV Set (DEV1)
Laptop PC (DEV2)
U4’, U4”
Corridor U9
Repeater U9
U4”
U4’
Camcorder (DEV4)
HD TV Set (DEV3)
Portable Device (DEV5)
Room2
Room3
Repeater device: A device to extend a service area of the network. It might have multiple mode transceivers that operate on different channels.
U4’: A variation of U4 with a longer (up to 10m) separation
U4”: A variation of U4’ with a fixed receiver
Tadahiko Maeda, Oki Electric Industry Co., Ltd.
Tadahiko Maeda, Oki Electric Industry Co., Ltd.

4. Usage Model Usage Model Covers Use Cases Application mix Comment
June, 2006
Usage Model
Usage Model
Covers Use Cases
Application mix
Comment
Residential
(Wireless Home Video Network)
U1, U4(U4’&U4”), U9
1 x Server
DEV1:
uncompressed HDTV(A1)
DEV2, 3 & 4:
compressed HDTV(A1)
DEV5:
contents download(A2)
A server streams uncompressed and compressed HD video to DEVs in the same room and other rooms. It also works as a download server to portable devices.
Some repeater devices shall be equipped to extend service areas in a house.
Tadahiko Maeda, Oki Electric Industry Co., Ltd.

5. June, 2006
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, CTV, 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 systems.
Tadahiko Maeda, Oki Electric Industry Co., Ltd.

6. Applications in the System
June, 2006
Applications in the System
Two classes of applications
Real-time HD video streaming applications
Compressed (MPEG-2): 24 Mbps (typical)
Uncompress (HDMI): 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 equipments
Typically less than 100 Mbps
Tadahiko Maeda, Oki Electric Industry Co., Ltd.

7. Traffic Assume a following scenario;
June, 2006
Traffic
Assume a following scenario;
Four 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 at the end of the server.
Tadahiko Maeda, Oki Electric Industry Co., Ltd.

8. June, 2006
Repeater
If N segment links in a home network share one channel time, its effective throughput is reduced to 1/N.
For example, seven repeater may divide a network into eight segments. It means that 3 Gbps PHY can support as small as 375 Mbps of throughput.
Repeaters should be able to transmit or receive simultaneously to keep total throughput hight.
Tadahiko Maeda, Oki Electric Industry Co., Ltd.

9. Other Involved Use Cases
June, 2006
Other Involved Use Cases
U4 is a compressed HD Video transmission to mobile devices at m distance.
U4’ is basically U4 but its transmission distance is more than 1 m (up to 10 m).
U4” is basically U4 but its target devices are stationary.
Tadahiko Maeda, Oki Electric Industry Co., Ltd.