PHY motion #147. 2247 Vincent 26.3.2 75.15 The GI for an NDP Define a GI for Rejected. Knowles IV should be the maximum the HE NDP. 11ax spec Jones length GI. The Define it to be framework maximum length GI will the maximum GI specifies that provide the best fidelity length. mandatory GI of channel value for NDP is measurement, and since either 1.6uS or there are very few GI in 0.8uS. This an entire NDP PPDU, decision is made there isn't too much after many overhead for selecting discussions. the max GI Maximum GI value is applied only when HELTF-4x sequence is used in NDP PPDU in spec framework, which is an optional mode. Discussion: The commenters are right that HE-LTF mode and PE duration for HE NDP PPDU should be explicitly specified as in ax spec framework. The commenters are right that duration of each field in Figure 26-5 need to be specified. On P75L25 (CID #836): Figure 26-5 is modified as suggested. ax editor: please make the following changes in Clause 26.3.2: Figure 26-5—HE NDP PPDU format On P75L33 (CID #883): ax editor: please make the following changes in Clause 26.3.2: The HE NDP PPDU has the following properties: uses the HE SU PPDU format but without the Data field —It HE-LTF is the only mandatory mode for NDP. 4X HE-LTF is optional mode for NDP. —2X is always present in a NDP PPDU, with a duration of 4uS. —PE PPDU uses either of the mandatory GI values (1.6uS or 0.8uS). GI shall be set to 3.2uS if 4X —NDP HE-LTF sequence is used for NDP PPDU. On P75L35 (CID #884): Refer to resolution of CID #883.
PHY motion #147. 2247 Vincent Knowles IV Jones 26.3.2 75.15 The GI for an NDP should be the maximum length GI. The maximum length GI will provide the best fidelity of channel measurement, and since there are very few GI in an entire NDP PPDU, there isn't too much overhead for selecting the max GI Define a GI for the HE NDP. Define it to be the maximum GI length. Rejected. 11ax spec framework specifies that mandatory GI value for NDP is either 1.6uS or 0.8uS. This decision is made after many discussions. Maximum GI value is applied only when HELTF-4x sequence is used in NDP PPDU in spec framework, which is an optional mode. Discussion: The commenters are right that HE-LTF mode and PE duration for HE NDP PPDU should be explicitly specified as in ax spec framework. The commenters are right that duration of each field in Figure 26-5 need to be specified. On P75L25 (CID #836): Figure 26-5 is modified as suggested. ax editor: please make the following changes in Clause 26.3.2: Figure 26-5—HE NDP PPDU format On P75L33 (CID #883): ax editor: please make the following changes in Clause 26.3.2: The HE NDP PPDU has the following properties: —It uses the HE SU PPDU format but without the Data field —2X HE-LTF is the only mandatory mode for NDP. 4X HE-LTF is optional mode for NDP. —PE is always present in a NDP PPDU, with a duration of 4uS. —NDP PPDU uses either of the mandatory GI values (1.6uS or 0.8uS). GI shall be set to 3.2uS if 4X HE-LTF sequence is used for NDP PPDU. On P75L35 (CID #884): Refer to resolution of CID #883.
11-16-0937-04-00ax-11ax-comment-resolutions-for-clauses-26-3-2-26-3-9-3-26-3-9-4-26-3-9-5-26-3-10-2-26-3-10-13.docx