Doc.: IEEE 802.15-15-08-0334-00-0006 May, 2008 SubmissionSlide 1 Dr. O. C. Omeni (Toumaz Tech Ltd) Project: IEEE P802.15 Working Group for Wireless Personal.

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Doc.: IEEE May, 2008 SubmissionSlide 1 Dr. O. C. Omeni (Toumaz Tech Ltd) Project: IEEE P Working Group for Wireless Personal Area Networks (WPANs) Submission Title: [ A Perspective of the BAN MAC ] Date Submitted: [11 January, 2008] Source: [Dr. Okundu Omeni] Company [Toumaz Technology Ltd] Address [115 Milton Park, Abingdon, UK] Voice:[ ], FAX: [ ], Re: [n/a] Abstract:[How do the stated technical requirements constrain the PHY & MAC?] Purpose:[ Explores the various technical requirements and their impact on the PHY and MAC considerations for this standard ] 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

Doc.: IEEE May, 2008 SubmissionSlide 2 Dr. O. C. Omeni (Toumaz Tech Ltd) A Perspective of the BAN MAC Dr. Okundu C. Omeni Toumaz Technology Ltd.

Doc.: IEEE May, 2008 SubmissionSlide 3 Dr. O. C. Omeni (Toumaz Tech Ltd) Motivation Wide application space for BAN standard Performance requirements in technical specifications documents appear to conflict with the applications

Doc.: IEEE May, 2008 SubmissionSlide 4 Dr. O. C. Omeni (Toumaz Tech Ltd) Key Application Areas Medical – vital signs monitoring Sports – heart rate, speed Entertainment – gaming, video/audio Other fancy stuff…

Doc.: IEEE May, 2008 SubmissionSlide 5 Dr. O. C. Omeni (Toumaz Tech Ltd) High Level Requirement This states that data rates up to 10Mbps and down to 10kbps should be supported. (see section 2.1 of document [ ]) This requirement needs to also be in line with the applications and MAC topology chosen Generally the highest data rate would determine the power consumption, so we cannot get the low power benefits of low data rate if we also need to support the highest data rates.

Doc.: IEEE May, 2008 SubmissionSlide 6 Dr. O. C. Omeni (Toumaz Tech Ltd) Higher Data Rate complicates PHY choices A 10Mbps data rate requirement would mean that a bandwidth of around 10MHz/channel is required If we use a lower bandwidth, then more complex (power hungry) modulation/demodulation schemes would be required.

Doc.: IEEE May, 2008 SubmissionSlide 7 Dr. O. C. Omeni (Toumaz Tech Ltd) Higher Data Rate Applications also complicate MAC choices Do Audio/video streaming applications do fit into TDMA? How can these co-exist on the same network with medical application? Why should they? If they shouldnt, then why should they all be supported by this standard?

Doc.: IEEE May, 2008 SubmissionSlide 8 Dr. O. C. Omeni (Toumaz Tech Ltd) Higher Data Rate Applications also complicate MAC choices – contd… These are really 2 different standards (like c & e) Trying to forge them into 1 would significantly complicate both the PHY and MAC and it would be a huge challenge to meet the key objective of this standard; which is a low complexity, ultra-low power and high reliability communication standard

Doc.: IEEE May, 2008 SubmissionSlide 9 Dr. O. C. Omeni (Toumaz Tech Ltd) MAC Requirements Periodic data (TDMA MAC) Non-periodic data (in case of medical alarm) (Contention based MAC) The available approaches to support this have been discussed in earlier presentations, so I wont be going into that.

Doc.: IEEE May, 2008 SubmissionSlide 10 Dr. O. C. Omeni (Toumaz Tech Ltd) A Hybrid MAC Approach Combine both TDMA and contention based access Gives the benefits of periodic and non-periodic traffic Network planning required Sensor nodes sleep when not communicating Coordinator communicates with the sensor nodes during their assigned time slots and listens otherwise Sensor nodes with critical data can transmit outside their time slots

Doc.: IEEE May, 2008 SubmissionSlide 11 Dr. O. C. Omeni (Toumaz Tech Ltd) Low Power and Small Form factor Small battery size required This means battery capacity is limited Specifically peak power is also tied to the battery size

Doc.: IEEE May, 2008 SubmissionSlide 12 Dr. O. C. Omeni (Toumaz Tech Ltd) connected freedom Wearable Batteries: Wireless Standards Increasing Power, Cost, Size Flexible ThinZinc Air ButtonLithium CoinAAA/AARechargeable (Li based) Voltage (V)1.0~1.5 ~ ~ 3.6 Peak Current (mA)< 3< 10 > 15> 100> 1000 Typ Charge (mAh) Easily Disposable Wibree(ULP BT)/Bluetooth/ Zigbee/ Existing Proprietary UWB/ WiFi/ standard All current standards compromise power consumption for generality, data rate/range.

Doc.: IEEE May, 2008 SubmissionSlide 13 Dr. O. C. Omeni (Toumaz Tech Ltd) Conclusion We need to leverage on the characteristics of this application area to develop the most efficient solution

Doc.: IEEE May, 2008 SubmissionSlide 14 Dr. O. C. Omeni (Toumaz Tech Ltd) Thank you for Listening