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Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

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 ]

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Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)

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  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. Noriyasu Kikuchi, Oki Electric Industry Co., Ltd.

  2. Proposed Usage Model Hideto Ikeda Noriyasu Kikuchi Kiyohito Tokuda Oki Electric Industry Co., Ltd. Noriyasu Kikuchi, Oki Electric Industry Co., Ltd.

  3. Wireless Home Video Network Outside Line (Internet) Home Video Server（Home Gateway） Room1 U1’ U4’×2,U4”,U9’ U4’ HD TV Set (DEV1) Laptop PC (DEV2) Repeater U4” Corridor U9’ U4’ Repeater Repeater U4” U9’ U4’ Camcorder (DEV3) HD TV Set (DEV4) Portable Device (DEV5) Room2 Room3 Repeater device: A device to extend linksbetween source and destination devices It might have multiple mode transceiversthat operate on different channels. Noriyasu Kikuchi, Oki Electric Industry Co., Ltd.

  4. Usage Model Noriyasu Kikuchi, Oki Electric Industry Co., Ltd.

  5. Involved Use Cases 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. Noriyasu Kikuchi, Oki Electric Industry Co., Ltd.

  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 centralhomevideo 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. Noriyasu Kikuchi, Oki Electric Industry Co., Ltd.

  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. Noriyasu Kikuchi, Oki Electric Industry Co., Ltd.

  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). Noriyasu Kikuchi, Oki Electric Industry Co., Ltd.

  9. Repeater • Repeater device isto 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. Noriyasu Kikuchi, Oki Electric Industry Co., Ltd.

  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. Noriyasu Kikuchi, Oki Electric Industry Co., Ltd.

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