[wi-sun rlmmwg] Changes to RLMM Annex in PHY Specification

[Ryota Yamada]

Dear Ben-san,

Thank you very much for your comment and proposal. I understand your 
point and the proposal seems to be good for.

Kunal-san,

The proposed change is acceptable for RLMM profile. Thank you very much.

Best regards,
Ryota


On 2016/03/08 4:58, Kunal Shah wrote:
> Hi Yamada-san and Ben,
>
> Thank you for your comments.
>
> Yamada-san: Is the proposed change to the resolution is acceptable for RLMM profile,
> "The FCS field in the PHR shall be set to 0 when the frame contains a
> 4-octet FCS and shall be set to 1 when the frame contains a 2-octet FCS."
>
> Please let me know and I will incorporate the same in the PHY specification.
>
> Regards,
> Kunal Shah
>
>
>
>
> On 3/4/16, 9:58 AM, "rlmmwg on behalf of Benjamin A. Rolfe" <rlmmwg-bounces at wi-sun.org on behalf of ben at blindcreek.com> wrote:
>
>> Ryota-san,
>> The current text is technically contradictory.  The first sentence
>> "shall be set to 0" precludes generating a frame with FCS field set to
>> 1, thus  contradicts the sentence "It can also use 2-octet CRC, in which
>> case, the FCS Type field is set to 1.". This is the problem identified
>> by the commenter (me).  I had inferred the first sentence was correct,
>> which from your explanation (if I understand correctly) was an incorrect
>> conclusion.  I apologize for my confusion.
>> I propose the following to reflect that for RLMM  either 2-octet or
>> 4-octet FCD may be used:
>>
>> "The FCS field in the PHR shall be set to 0 when the frame contains a
>> 4-octet FCS and shall be set to 1 when the frame contains a 2-octet FCS."
>>
>> I hope that correctly reflects what you intended.
>>
>> Regards
>> Ben
>>
>> On 3/3/2016 9:17 PM, Ryota Yamada wrote:
>>> Dear Kunal-san,
>>>
>>> I will put my comments between lines below.
>>>
>>>
>>> On 2016/03/03 8:20, Kunal Shah wrote:
>>>> Dear RLMM WG and Yamada-san,
>>>>
>>>> PHYWG recently gone through the ballot process as part of the PHY
>>>> specification and some of the comments received as part of the RLMM
>>>> profile Annex.
>>>>
>>>> One of the comment is to change the support for FCS type sentence.
>>>>
>>>> Currently the RLMM Annex as part of the PHY specification includes,
>>>> "The FCS Type field (in the PHR) shall be set to 0 (4-octet CRC). It can
>>>> also use 2-octet CRC, in which case, the FCS Type field is set to 1.”
>>>>
>>>> Proposed change,
>>>> "The FCS Type field (in the PHR) shall be set to 1 (2-octet CRC).
>>>> Packets received with the FCS field set to 0 may be discarded.”
>>>
>>> In RLMM Profile, as a result of the discussion in RLMM WG, both
>>> 2-octet FCS and 4-octet FCS can be supported. When PSDU size is no
>>> more than 255 octets, some devices can use 2-octet FCS. On the other
>>> hand, some other devices can choose to se 4-octet FCS in different
>>> type of network defined in RLMM Profile. Therefore, the proposed
>>> change is not acceptable.
>>>
>>>
>>>> Other editorial changes was proposed to change the sentence from, "This
>>>> normative annex specifies PHY requirements for the Wi-SUN RLMM
>>>> profile.”, to "This normative annex contains PHY requirements specific
>>>> to the Wi-­SUN RLMM profile.”
>>>
>>> This editorial change seems to be acceptable.
>>>
>>>
>>> Best regards,
>>> Ryota
>>>
>>>
>>>> I would like to ask the group if the above resolution is acceptable as
>>>> shown above. Please let me know of any comments or objections by 4th
>>>> March 10PM JST.
>>>>
>>>> Please let me know of any comments or questions.
>>>>
>>>> Regards,
>>>> Kunal Shah
>>>> PHYWG Chair
>>>>
>>>>
>>>
>>
>>
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