CID Comment Proposed use Change 155 2 2 T Comment on coexistence assurance Define a document: Section 2 (Channelization) plan for says" While adopting 1.08GHz channel as coexistence described in Clause 25 for 802.11aj [1], with 11ad. 802.11aj ensures coexistence with Suggestion is 802.11ad by using DBC mechanism to limit defined in clause 9 in 802.11aj [1]". The 802.11aj to DBC mechanism in Draft 1.0 is a QDMG. based protection that breaks with density and mobility of DMG devices; to the best of my knowledge all viable 802.11 amendments have used a PHY-based protection using legacy headers. 802.11aj will NOT be backward compatible with 802.11ad unless using the 11ad preamble; otherwise no part of a CDMG packet can be decoded by a DMG device. 166 In Section 2 (Channelization) of Define a coexistence assurance document it states plan for that " adopting 1.08GHz channel as coexistence described in Clause 25 for 802.11aj [1], with 11ad. 802.11aj ensures coexistence with Suggest 802.11ad by using DBC mechanism limiting defined in clause 9 in 802.11aj [1]". The 802.11aj to DBC is a MAC approach, quite QDMG different from PHY based coexistence approach as in all other 11 standards. In addition the DBC relies on using SP both on DMG and CDMG. Since DMG is using CBAP mainly, the DBC mechanism may not work well. Proposed resolution: Revised. In order to effectively share the same spectrum with DMG STAs as much as possible, besides existing MAC layer mechanisms defined in 11aj, some amendments are proposed to 11aj D1.0, including transmitting the length of the 1.08 GHz PPDU on 2.16 GHz channel. See details in clause 3.4 of the general discussions on proposed resolutions on page 3-4.
CID Comment Proposed Change 155 2 2 T Comment on coexistence assurance document: Section 2 (Channelization) says" While adopting 1.08GHz channel as described in Clause 25 for 802.11aj [1], 802.11aj ensures coexistence with 802.11ad by using DBC mechanism defined in clause 9 in 802.11aj [1]". The DBC mechanism in Draft 1.0 is a protection that breaks with density and mobility of DMG devices; to the best of my knowledge all viable 802.11 amendments have used a PHY-based protection using legacy headers. 802.11aj will NOT be backward compatible with 802.11ad unless using the 11ad preamble; otherwise no part of a CDMG packet can be decoded by a DMG device. Define a plan for coexistence with 11ad. Suggestion is to limit 802.11aj to QDMG. 166 In Section 2 (Channelization) of coexistence assurance document it states that " adopting 1.08GHz channel as described in Clause 25 for 802.11aj [1], 802.11aj ensures coexistence with 802.11ad by using DBC mechanism defined in clause 9 in 802.11aj [1]". The DBC is a MAC based approach, quite different from PHY based coexistence approach as in all other 11 standards. In addition the DBC relies on using SP both on DMG and CDMG. Since DMG is using CBAP mainly, the DBC mechanism may not work well. Define a plan for coexistence with 11ad. Suggest limiting 802.11aj to QDMG Proposed resolution: Revised. In order to effectively share the same spectrum with DMG STAs as much as possible, besides existing MAC layer mechanisms defined in 11aj, some amendments are proposed to 11aj D1.0, including transmitting the length of the 1.08 GHz PPDU on 2.16 GHz channel. See details in clause 3.4 of the general discussions on proposed resolutions on page 3-4. use
11-16-0719-00-00aj-proposed-resolution-to-cid-100-101-102-etc-in-lb217.docx