CSP

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Project IEEE 802.15 Working Group for Wireless
Personal Area Networks (WPANs) Submission Title
Requirements for a UWB Common Signaling
Protocol Date Submitted 19 February,
2004 Source Yasaman Bahreini, John Santhoff,
Kai Siwiak, Ismail Lakkis Company1
PulseLINK Company2 Wideband Access,
Address1 1969 Kellogg Ave. Carlsbad, CA 92008,
Address 2 12396 World Trade Ave. Suite 117, San
Diego, CA 92128, Voice 1(760) 607-0844, FAX
1 [phone], E-Mails 1ybahreini_at_ieee.org
, jsanthoff_at_pulselink.net, k.siwiak_at_ieee.org
Voice 2(858) 618-1930, FAX 2 (858)
618-1980, E-Mail 2ilakkis_at_widebandaccess.com R
e Ad hoc Meeting Submission Abstract At
least one task group has chosen a UWB PHY, and
another group in P802.15 is considering UWB PHY
that will operate in common spectrum. This
presentation focuses on potential coexistence
issues of multiple UWB PHY layers in a common
frequency band. Purpose Focus and attention
need to be directed to P802.15 and discussions
started on issues effecting coexistence of
multiple UWB PHY layers using common spectrum. It
is early enough in the standards draft process to
consider preemptive measures to ensure
coexistence. 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.
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Coexistence of Multiple UWB Physical Layers ?

• Allowing Many Flavors of UWB Signaling to Coexist

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Outline

• Coexistence picture today
• How do we address UWB Coexistence?
• A Common Signaling Protocol
• Design Goals for a Common Signaling Protocol
• Proposed Schemes

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Coexistence Picture Today

• Currently only one UWB standard in draft
  P802.15.3a
• Today concern is UWB transmitter to Narrow-Band
  receiver.
• Coexistence, however, is the ability of one
  system to perform a task in a given shared
  environment where other systems that may or may
  not be using the same set of rules. IEEE
  802.15.2 definition of coexistence,
  http//grouper.ieee.org/groups/802/15/pub/2000/
  Sep00/99134r2P802-15_TG2-CoexistenceInteroperabili
  tyandOtherTerms.ppt
• In the works
• P802.15.4SG4a might consider a UWB solution
• P802.11 are looking for solutions which might
  involve UWB
• We need a pre-emptive action to ensure the
  orderly introduction of various UWB PHYs

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How do we Solve the Problem?

• We need an Etiquette to manage peaceful
  coexistence of different UWB PHY layers
• Todays action set the path for UWB evolution for
  decades.
• A framework is needed that addresses guidelines
  on what spectrum is accessed when
• A common signaling protocol can act as such an
  arbitrator

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Why a Common Signaling Protocol?

• We have a Once-in-a Lifetime opportunity to
  define an emerging wireless standard on a
  potentially global scale
• Lets use this opportunity to address
  interoperability and coexistence as a part of the
  standard instead of as an after thought
• Example of the recent past
• the unlicensed ISM bands have experienced
  explosive growth with multiple PHY layer
  interfaces defined
• In the ISM 2.4 GHz band, there are no less than
  five different PHY standards competing for
  coexistence in the same spectrum. (802.11b,
  802.15.3, 802.15.4, Bluetooth and Cordless
  Phones)
• UWB is gaining momentum
• It is likely that multiple UWB based PHY layers
  will emerge
• Already in 802.15.3a potential in 802.15.4SG4a

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What is a Common Signaling Protocol?

• A UWB operational mode understandable to all UWB
  air interfaces
• Methodology for allowing multiple different UWB
  PHY layers to coexist in
• the same spectrum bands
• same coverage areas
• Uses cooperative management of allocated PHY
  resources of time and frequency

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Design Philosophy

• Common mechanism that is pro-active rather than
  re-active
• Uses a pre-defined framework potentially allowing
  fair UWB PHY layer resources allocation
• Collaborative
• Collaborated TDMA /FDMA techniques to allow for
  alternate transmissions among different UWB
  standards
• Collaborated techniques for managing packet
  transmission based on channel monitoring
• Non-Collaborative
• Adaptive packet (time/frequency) selection and
  scheduling

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Design Goals

• Address coexistence - interoperability among
  differing UWB PHYs
• Low cost so minimal PHY is not burdened
• Provide discovery beacon
• Provide coarse SYNCH, diversity, frequency
  acquisition, AGC, channel estimation, protocol
  selection
• Basis for a low rate long range PHY
• Enable geo-positioning
• Mechanism for sleep mode
• Procedure for wake up