Thz IG July 2009 Minutes

Thz IG July 2009 Minutes

July, 2009 IEEE P802.15-09-0529-00-0thz

IEEE P802.15

Wireless Personal Area Networks

Project / IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)
Title / THz IG July 2009 Minutes
Date Submitted / July, 2009
Source / [Richard D Roberts]
[Intel]
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Minutes of the July 2009 THz IG

Meeting was called to order. Approval of previous meetings minutes.

Agenda was amended to include one contribution and two discussion topics as shown below.

Agenda was then approved (Doc 15-09-0456-02-0thz-July-2009-THz-AGENDA.xls)

Agenda Item 1.5

Document 15-09-0496-00 was presented: “Measuring the Channel Characteristics at 300 GHz - Preliminary Results”. Some of the points of interest were …

  • QPSK modulation
  • Compound Antenna: 26 dB horn with a 14 dB lens = 40 dB total antenna gain TX & RX
  • TX Output Power EIRP: 50 uW + 40 dB gain

Agenda Item 1.6

Highlights of the discussion …

  • Advantage to staying an IG while we “figured out” THz because we don’t have the pressure of the “study group” lifetime.
  • Concern was expressed by Bob Miller of AT&T that we did not have enough influence as an IG to influence ITU WRC and that a SG would have more influence (because it was heading towards a task group). Bob indicated he’d like to see the IG transition to a SG by the end of the year.
  • Rick Roberts expressed concern that there was not enough widespread interest or capability in THz technology to support a standards effort.
  • Bob Miller indicated that Ft of electronics is increasing and that having THz capable semiconductors was on the horizon.
  • The chair expressed concern that only AT&T and Intel sponsored delegates had brought in use case (application) ideas and that these two use cases where significantly different. AT&T was looking more at point-to-point backhaul applications (10’s of meters) and Intel was looking at short range (< 1m), high bit rate (~40 Gbps), point-to-point connectivity.
  • The committee agreed that we needed more application input in order to determine the intended nature of deployment of THz technology. This would definitely be needed to support a SG writing a PAR and 5C. The chair took an action item to draft a “call for applications” and solicit comments on the draft via the THz email reflector leading to a final version of the document. The chair would then disseminate the CFA via the IEEE802 exploders in hopes of getting more input from industry in regards to intended uses.
  • The chair walked the committee through the 802.15.3c 5C to illustrate some of the issues that the 5C dealt with.

Agenda Item 1.7

A discussion on spectrum issues ensured.

  • The sponsored delegates from AT&T emphasized once again the urgency of protecting active THz emitters in the THz band. The band of most interest is from 300 GHz to 1,000 GHz due its atmospheric absorption properties. They indicated that the passive THz sensor folks are trying to prevent active deployment of devices in this “band”. The issue will emerge at the next ITU WRC meeting.
  • The issue with the active vs. passive THz is the position by the earth sensing community that active deployments on earth will disrupt the passive sensing applications from space orbiting platforms. There was similar issue in regards to 60 GHz and the good news is it seemed to get resolved in that band.

Ad-hoc, non-agenda item, discussion

With some time left in the session, the committee chose to have a discussion on the issue of THz vs. FSO (free space optics) infrared.

  • There were advocates for both technologies with some saying that THz had an advantage in performance over FSO for backhaul applications, while others indicated that for short range (<1 meter) photonics had a complexity advantage.
  • Hirosha Ogawa briefed the committee on work being done by NICT on a 10 Gbps, 40 Gbps and 320 Gbps FSO link using WDM. The operating range was several hundred meters.
  • There was agreement that we need to first issue the CFA and then perhaps revisit this discussion again after we see what industry in looking for.

Attendees:

Rick Roberts, Intel Corporation

Thomas Kurner, TUB

Robert Miller, AT&T

David Britz, AT&T

Hiroshia Ogawa, ARIB

Doug Castor, InterDigital

Andre Bourdoux, IMEC

Changsoon Choi, IHP

Shoichi Kitazawa, ATR

Julan Hsu, Samsung

Huai-Rong Shao, Samsung

Vish Ponnampalam, MediaTek

Steve Yao, ITT Corp.

SubmissionPage 1Richard D Roberts, Intel

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