1. Project: IEEE P802.15 Working Group for Wireless Personal Area Networks (WPANs)
Submission Title: [Response to optional CoU and CS pulses related comments]
Date Submitted: [March 8, 2006]
Source: [Huan-Bang Li, Kenichi Takizawa, Yuko Rikuta, Shinsuke Hara, Tetsushi Ikegami, and Ryuji Kohno]
Company [National Institute of Information and Communications Technology (NICT)]
Contact: Huan-Bang Li.
Voice:[ ,
Abstract: [Suggested response and remedy on comments related to optional CoU and CS pulses ]
Purpose: [To help the resolve no-vote comments for 15.4a draft]
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

2. Response to Optional CoU and CS Pulses Related Comments
Huan-Bang Li, Kenichi Takizawa, Yuko Rikuta, Shinsuke Hara, Tetsushi Ikegami, and Ryuji Kohno National Institute of Information and Communications Technology (NICT)

3. TR Comment No.441
Comment
The y scales of the graph are not defined. What are these?
Response
Accept.
The y scales of the graph is amplitude.
Remedy
Add ‘amplitude’ to the y axis of the graph. (Fig. 27h)
amplitude

4. TR Comment No.442 Comment Response
The Greek letter mu is already in use in this standard for a different quantity.
Pick a different letter.
Response
Accept.
Remedy
Replace ‘mu’ with ‘beta’
(Page 37, Line and Table 39I)
where r(t) denotes the mandatory pulse shape given in Section 6.8a and the chirping rate (chirping slope).
 (slopes)
(slopes)

5. TR Comment No.443 Comment Response
“will remain the same” is not strong enough.
Change to “shall be the same”..
Response
Accept.
Remedy
Change as suggested
(Page 36, Line 7-8
Page 37, Line 10-9 from bottom)
all modulation specifications will remain the same as they are for the mandatory pulse shape
all modulation specifications shall be the same as they are for the mandatory pulse shape

6. TR Comment No.444 Comment Response
'tau(f) is not in units of seconds/Hz, it is units of seconds. If, on the other hand you are describe a constant tau that is multiplied by frequency as opposed to a function tau that has frequency as a parameter, then the constant would indeed have units of second/Hz
'Remove references to tau(f) and replace with tau * f
Response
Accept.
Remedy
Change as suggested
(Page 37, Equation o-2 and the line under it)
See next page

7. TR Comment No.444 (Continue)
where, represents the group delay
where, represents the group delay

8. TR Comments No. 610 and No.611 Comment
The standard as produced is really complicated for a sensor application. Furthermore, optional pulse shapes and the like will thwart true standardization, as equipment built with the different pulse shapes will not be compatible. To simplify, I suggest eliminating all optional pulse shapes. This applies both to the chaotic pulses and the continuous time pulses.
Response
Reject. The reasons are given in following.
One can select to install the mandatory pulse only if this meets the requirements.
Optional pulse shapes only need to be installed when one want to take the advantages provided by the optional pulses.
Inter-operability is guaranteed because FFD keep listening with the mandatory pulse even when operated in optional modes.

9. TR Comment No.762
Comment
Interoperation of chirp-capable nodes with non-chirp capable nodes needs to be clarified. It appears that the two modes are completely incompatible, creating what is essentially yet another alternate PHY.
Response
Reject. The reasons are given in following.
Interoperation is guaranteed because FFD keep listening with the mandatory pulse even when operated in optional modes. When both chirp-capable nodes and non-chirp capable nodes exist in a piconet, the piconet can only operate with the mandatory pulse.

10. TR Comment No.865
Comment
These pulses need to support reception by the non-coherent receiver (need to have same pulse or symbol duration and bandwidth, etc).
Response
Accept in principle.
An option will only be validated in a piconet that all devices are installed with this option and the coordinator approves the use of this option. Default demodulation is coherent. To make the CoU option more feasible, the chirp slops in Table 39I are modified.
See next page.

11. TR Comment No.865 (Continue)
Table 39I CoU channel slopes
Table 39I CoU channel slopes
Channel number
(slopes)
Ch.1
500MHz/100ns
Ch.2
-500MHz/100ns
Ch.3
1GHz/200ns
Ch.4
-1GHz/200ns
Ch.5
1.4GHz/300ns
Ch.6
-1.4GHz/300ns
Channel number
(slopes)
CCh.1
500MHz/2.5ns
CCh.2
-500MHz/2.5ns
CCh.3
1GHz/5ns
CCh.4
-1GHz/5ns
CCh.5
1GHz/10ns
CCh.6
-1GHz/10ns

12. T Comment No.725
Comment
It is unfortunate that we have an additional channel frequency table. Can this somehow be integrated into the existing frequency channel plan?
Response
Accept in principle.
These are additional channels provided by the CoU pulses to support more SOP in addition to FDM.
Remedy
To distinguish from the representation of FDM channels, replace Ch.# by CCh.#. (Chirping Ch).
(Table 39I)

13. T Comments No. 727
Comment
Are of the parameters of table 39m represented in the MLME/PLME/MAC commands?
Response
Accept in principle.
Remedy
To be added.
(See general framework)

14. T Comment No. 728
Comment
Problem in notation between Equation 2 and Figure 27j.
This may only be editorial ... is there an argument change between equation 2 and Figure 27j?
Response
Accept in principle.
The argument is ‘tau’.
See next page

15. T Comment No. 728 (Continue)
Time [ns]

16. T Comment No.866
Comment
Need details on how the transmitter and receiver will negotiate the use of the chirp pulses
Response
Accept in principle.
Remedy
This is controlled by PAN coordinator. See general framework.

17. T Comment No. 867
Comment
For CS pulses, does the TX filtering affect the receiver performance? How does the receiver know which pulse shape to expect?
Response
Accept in principle.
The receiver must support the same pulse as the transmitter.
Remedy
See general framework.

18. E Comment No.143
Comment
Add "CoU", and all other new acronyms and abbreviations, to clause 4.
Response
Accepted
Remedy
Add as suggested.

19. E Comment No.255
Comment
Be sure to add "SOP" to clause 4, Acronyms and Abbreviations.
Response
Accept
Remedy
Add as suggested.

20. E Comment No.272 Comment third paragraph; Which Equation (1)? Response
Accept.
Remedy
Change to Equation (o-1).
(Page 36, above the graph)

21. E Comment No.273 Comment SI unit for nanoseconds is ns Response
Accept.
Remedy
Replace ‘nsec’ with ‘ns’.
(Caption of Figure 27j)

22. E Comment No.274
Comment
second paragraph; What is this jumble of words trying to state?
Response
Accept in principle
Remedy
Replace the paragraph above Table 39m with “Group delay values used for this option are listed in Table 39m. Each 500MHz band shall use No.1 or No.2 pulses, while Each 1.5GHz band shall use one of No.3 through No.6 pulses.”
(Page 38)

23. E Comment No.440 Comment Equation (1) is the wrong cross reference.
Response
Accept.
Remedy
Replace ‘Equation (1)’ with ‘Equation (o-1)’

24. E Comments No.588
Comment
1. Replace 'Equation (1)' by 'Equation (o-1)'.
2. Replace 'chirped DS pulse' by 'CoU pulse'.
Response
Accept.
Remedy
Change as suggested.
(above Figure 27h)

25. E Comments No.726
Comment
I guess I don't understand the concept behind continuous spectrum pulses. Perhaps a little bit of explanation as to why these pulses are continuous. For example, what is a non-continuous spectrum pulse?
Response
Accept in principle.
Remedy
Change all occurrences of continuous spectrum pulses to controlled phase-continuous pulses in section 6.8a and add the following text ahead of the paragraph above Equation (o-2).
“This pulse shape is generated by passing a mandatory pulse through a filter with controlled group delay characteristics over the signal bandwidth. It is a group delay controlled pulse.”

26. Not Comment But …
Remove the following text above Table 39I in 6.8a.3.3.4
“It should be noted that a 500MHz bandwidth implies the 494MHZ and 507MHz bandwidths and that a 1.5GHz bandwidth implies the 1.4GHz and 1.3GHz bandwidths, given in Section b.”