transmit chains to ""EDMG BRP-TX packets used in a simultaneously. BRP TXSS shall be sent using multiple transmit chains simultaneously""" Proposed resolution: Rejected Discussion: The text referred to by the commenter is: both initiator and responder of a BRP TXSS are SU-MIMO capable (as defined in 10.38.9.2.2.1), “If EDMG BRP-TX packets used in a BRP TXSS may be sent using multiple transmit chains simultaneously.” In the BRP TXSS setup procedure, as defined in D1.0, the determination of whether the procedure is a TXSS-MIMO subfield in SISO BRP TXSS or a MIMO BRP TXSS is up to the initiator (by using the the EDMG BRP Request element within the BRP frame sent to start the procedure). To enable the commenter’s proposal, we could force TXSS-MIMO to be 1 when both STAs are SU-MIMO capable. However, I’m not certain whether that would be recommended. In the same way that two SU-MIMO capable stations may not always transmit data using multiple space-time streams (depending on channel conditions, for instance), forcing two SU-MIMO capable STAs to always perform the complete SU-MIMO BF training may cause unnecessary overhead. It is important to keep in mind that, in addition to SU-MIMO BF training, BRP TXSS will also be used in other cases, auch as in channel bonding BF training. It is important to give some flexibility for the STAs to choose the appropriate BF procedure for different transmission scenarios. SP/M: Do you accept the resolutions given in 18/0146r0 to the following CIDs: 1060, 1062, 1329, 1970, 1578, 2104, 1061, 1838, 2326, 1330, 1688, 1895, 1021, 1685, 2007, 1140?
transmit chains simultaneously. to ""EDMG BRP-TX packets used in a BRP TXSS shall be sent using multiple transmit chains simultaneously""" Proposed resolution: Rejected Discussion: The text referred to by the commenter is: “If both initiator and responder of a BRP TXSS are SU-MIMO capable (as defined in 10.38.9.2.2.1), EDMG BRP-TX packets used in a BRP TXSS may be sent using multiple transmit chains simultaneously.” In the BRP TXSS setup procedure, as defined in D1.0, the determination of whether the procedure is a SISO BRP TXSS or a MIMO BRP TXSS is up to the initiator (by using the TXSS-MIMO subfield in the EDMG BRP Request element within the BRP frame sent to start the procedure). To enable the commenter’s proposal, we could force TXSS-MIMO to be 1 when both STAs are SU-MIMO capable. However, I’m not certain whether that would be recommended. In the same way that two SU-MIMO capable stations may not always transmit data using multiple space-time streams (depending on channel conditions, for instance), forcing two SU-MIMO capable STAs to always perform the complete SU-MIMO BF training may cause unnecessary overhead. It is important to keep in mind that, in addition to SU-MIMO BF training, BRP TXSS will also be used in other cases, auch as in channel bonding BF training. It is important to give some flexibility for the STAs to choose the appropriate BF procedure for different transmission scenarios. SP/M: Do you accept the resolutions given in 18/0146r0 to the following CIDs: 1060, 1062, 1329, 1970, 1578, 2104, 1061, 1838, 2326, 1330, 1688, 1895, 1021, 1685, 2007, 1140?