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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: [ Resolution for CID 185, 265, 466 - LB67 ] Date Submitted: [ March 17, 2011] Source: [ Kuor Hsin Chang, Bob Mason] Company: [Elster Solutions ] Address: [] Voice: []

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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: [Resolution for CID 185, 265, 466 - LB67] Date Submitted: [March 17, 2011] Source:[Kuor Hsin Chang, Bob Mason] Company: [Elster Solutions] Address: [] Voice: [] E-Mail:[kuor-hsin.chang@us.elster.com, robert.t.mason@us.elster.com] Re: [Comment Resolution for TG4g LB67 draft] Abstract:The presentation provides resolution for CID 185, 265, 466 of LB67 Purpose: Presented to the 802.15.4g SUN Task Group for consideration and discussion 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.

  2. Outline • Comments to be resolved: • CID# 185, 265, 466 • Recommend Resolution • Resolution Detail

  3. Comments & Recommend Resolution • CID# 185: • Comment (Table 117, page 56, line 54): • Should the wording of this footnote be identical to the wording of the similar footnote in Table 116? • Proposed Change: • Make change if necessary. • Recommend Resolution: Accept in principle • Resolution Detail: • Change the wording of the footnote in Table 117 to be the same as Table 116. • CID# 265: • Comment (5.2.4.2.3, page 20, line 51): • The mode switch settling is defined in other sections of the document as having a range of 0-512 usec. The range here is limited to 255 usec. • Recommend Resolution: Accept • Resolution Detail: • Change the text to "Settling Delay is an unsigned integer whose value times two is the settling delay in microseconds (0-512 usec).”

  4. Comments & Recommend Resolution • CID# 466: • Comment: • A zero length secondary preamble and no secondary SFD can cause synchronization issues. • Proposed Change: • Clarify and as needed, reduce the list in the ModeSwitchDescriptor to a useful subset. • Recommend Resolution: Accept in principle • Resolution Detail: • When a mode switch PPDU is received, the receiver already established initial synchronization to the transmitter. For a mode switch from FSK modulation to FSK modulation, the re-synchronization is minimal. Also, the receiver is aware of the length of the preamble and whether a secondary SFD exists, and knows when to expect the new mode PPDU (see the text in line 1-5 of page 6). Given this mode switch could happen very quick, it is beneficial to allow for a zero length secondary preamble and for the SFD to be omitted. No change is needed.

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