IEEE P802.11 Wireless LANs Rx Procedure Comment Resolution for LB 178 D1.0 Date: 20 July 2011 Author(s): Name Affiliation Address Phone email eldad.perahia@intel.com Perahia Corporation CID Page Clause Comment Proposed Change Resn Resolution Status 2934 192.00 22.3.21 L-SIG parity bit is There are several possible D Disagree. With known to exhibit solutions to this problem, 2 improved RF and high false-positive of which are mentioned better receiver rate. The validity here: 1) Expand the CRC in sensitivity, issues of the packet VHT-SIG-A2 to include the with the single parity should not be Length field of L-SIG. 2) bit of the L-SIG as in based on this Defer the checking of the the days of 802.11a single parity bit. parity bit until are much reduced. field is decoded the Furthermore, even perform the check by back in the 11n comparing the L-SIG Length with VHT-SIG-B Length. development days, extra information was used to verify L-SIG, such as validity of the L-SIG rate (see CID Page Clause Comment Proposed Resn Resolution Change Status
IEEE P802.11 Wireless LANs Rx Procedure Comment Resolution for LB 178 D1.0 Date: 20 July 2011 Author(s): Name Affiliation Address Phone email Perahia Corporation eldad.perahia@intel.com CID Page Clause Comment Proposed Change Resn Status Resolution 2934 192.00 22.3.21 L-SIG parity bit is known to exhibit high false-positive rate. The validity of the packet should not be based on this single parity bit. There are several possible solutions to this problem, 2 of which are mentioned here: 1) Expand the CRC in VHT-SIG-A2 to include the Length field of L-SIG. 2) Defer the checking of the parity bit until field is decoded the perform the check by comparing the L-SIG Length with VHT-SIG-B Length. D Disagree. With improved RF and better receiver sensitivity, issues with the single parity bit of the L-SIG as in the days of 802.11a are much reduced. Furthermore, even back in the 11n development days, extra information was used to verify L-SIG, such as validity of the L-SIG rate (see CID Page Clause Comment Proposed Change Resn Status Resolution
11-11-0987-02-00ac-rx-procedure.docx