Preamble designs for next-generation WLAN in 60GHz band
Techniques pertaining to preamble designs for next-generation wireless local area networks (WLANs) in 60 GHz band are described. A first apparatus communicates in a 60 GHz band wirelessly with a second apparatus by transmitting a first physical-layer protocol data unit (PPDU) to the second apparatus and/or receiving a second PPDU from the second apparatus. Each of the first PPDU and the second PPDU and a respective preamble thereof are either with or without at least partial backward compatibility with one or more preexisting PPDU formats and preambles.
1 . A method, comprising:
communicating, by a processor of a first apparatus, in a 60 GHz band wirelessly with a second apparatus by:
transmitting a first physical-layer protocol data unit (PPDU) to the second apparatus; and
receiving a second PPDU from the second apparatus,
wherein at least one of the first PPDU and the second PPDU and a respective preamble thereof is with at least partial backward compatibility with one or more preexisting PPDU formats and preambles,
wherein the at least one of the first PPDU and the second PPDU contains a plurality of fields comprising a legacy short training field (L-STF), a legacy channel estimation field (L-CEF), a legacy header (L-Header) field, a universal signaling (U-SIG) field, an extremely-high-throughput (EHT) signaling (EHT-SIG) field, an EHT short training field (EHT-STF), an EHT long training field (EHT-LTF) and a data field,
wherein the at least one of the first PPDU and the second PPDU is transmitted or received with:
the EHT-STF and the EHT-LTF transmitted over an entirety of an operating bandwidth, and
at least the U-SIG field and the EHT-SIG field duplicated in multiple subchannels over the operating bandwidth, and
wherein at least two bits in the L-Header are set to indicate a presence of a U-SIG field, and wherein the U-SIG field, duplicated in multiple subchannels of the operating bandwidth, is transmitted prior to the EHT-STF in the at least one of the first PPDU and the second PPDU.
2 . The method of claim 1 , wherein the at least one of the first PPDU and the second PPDU and the respective preamble thereof is at least partially backward compatible with one or more preexisting PPDU formats and preambles in accordance with either or both of Institute of Electrical and Electronics Engineers (IEEE) 802.11ad and IEEE 802.11ay specifications.
3 . The method of claim 2 , wherein transmissions of the L-STF, L-CEF and L-Header field are in a single-carrier (SC) mode and kept same as with transmissions in accordance with either or both of the IEEE 802.11ad and IEEE 802.11ay specifications, and wherein bits B46 and B47 in the L-Header field are set to indicate a presence of the U-SIG field.
4 . The method of claim 3 , wherein a format of each of the U-SIG field, EHT-SIG field, EHT-STF, EHT-LTF and data field is similar to that in accordance with IEEE 802.11be specifications but with a different subcarrier spacing and a different bandwidth, and wherein the U-SIG field, EHT-SIG field, EHT-STF, EHT-LTF and data field are transmitted in an orthogonal frequency-division multiplexing (OFDM) mode.
5 . The method of claim 3 , wherein the EHT-STF and data field are transmitted over an entirety of a transmission channel bandwidth without duplication, and wherein the L-STF, L-CEF, L-Header field, U-SIG field and EHT-SIG field are transmitted in multiple subchannels duplicated over the entirety of the transmission channel bandwidth.
6 . The method of claim 3 , wherein the L-STF, L-CEF, L-Header field, EHT-STF and data field are transmitted over an entirety of a transmission channel bandwidth without duplication, and wherein the U-SIG field and EHT-SIG field are transmitted in multiple subchannels duplicated over the entirety of the transmission channel bandwidth.
7 . The method of claim 1 , wherein one of the first PPDU and the second PPDU and the respective preamble thereof is not backward compatible with one or more preexisting PPDU formats and preambles in accordance with either or both of Institute of Electrical and Electronics Engineers (IEEE) 802.11ad and IEEE 802.11ay specifications, and wherein either or both of a respective preamble and a PPDU format in accordance with Institute of Electrical and Electronics Engineers (IEEE) 802.11n, IEEE 802.11ac, IEEE 802.11ax or IEEE 802.11be are used for the preamble or PPDU format of the one of the first PPDU and the second PPDU.
8 . The method of claim 7 , wherein, responsive to a single-user multiple-input-multiple-output (SU-MIMO) transmission with a number of spatial streams up to 4 being supported, the respective preamble and PPDU format in a high-throughput (HT) system in accordance with the IEEE 802.11n specifications are used for the preamble and PPDU format of the one of the first PPDU and the second PPDU.
9 . The method of claim 7 , wherein, responsive to a multi-user multiple-input-multiple-output (MU-MIMO) transmission over an entirety of a transmission channel bandwidth without orthogonal frequency-divisional multiple access (OFDMA) being supported, the respective preamble and PPDU format in a very-high- throughput (VHT) system in accordance with the IEEE 802.11ac specifications are used for the preamble and PPDU format of the one of the first PPDU and the second PPDU.
10 . The method of claim 7 , wherein, responsive to a large resource unit (RU)-based transmission with orthogonal frequency-divisional multiple access (OFDMA) being supported, the respective preamble and PPDU format in accordance with the IEEE 802.11ax specifications are used for the preamble and PPDU format of the one of the first PPDU and the second PPDU.
11 . The method of claim 7 , wherein, responsive to a large resource unit (RU) or multi-resource unit (MRU)-based transmission with orthogonal frequency-divisional multiple access (OFDMA) being supported, the respective preamble and PPDU format in accordance with the IEEE 802.11be specifications are used for the preamble and PPDU format of the one of the first PPDU and the second PPDU.
12 . The method of claim 7 , wherein the one of the first PPDU and the second PPDU contains a plurality of fields comprising a legacy short training field (L-STF), a legacy long training field (L-LTF), a signaling (SIG) field, a short training field (STF), a long training field (LTF) and a data field, and wherein, responsive to a transmission channel bandwidth being greater than 80 MHz or 160 MHz or 320 MHz, the STF, LTF and data field are transmitted over an entirety of a transmission channel bandwidth without duplication while the L-STF, L-LTF and SIG field are transmitted in multiple 320 MHz subchannels duplicated over the entirety of the transmission channel bandwidth.
13 . An apparatus, comprising:
a transceiver configured to communicate wirelessly; and
a processor coupled to the transceiver and configured to perform operations comprising:
communicating, by a processor of a first apparatus, in a 60 GHz band wirelessly with a second apparatus by:
transmitting a first physical-layer protocol data unit (PPDU) to the second apparatus; and
receiving a second PPDU from the second apparatus,
wherein at least one of the first PPDU and the second PPDU and a respective preamble thereof is with at least partial backward compatibility with one or more preexisting PPDU formats and preambles,
wherein the at least one of the first PPDU and the second PPDU contains a plurality of fields comprising a legacy short training field (L-STF), a legacy channel estimation field (L-CEF), a legacy header (L-Header) field, a universal signaling (U-SIG) field, an extremely-high-throughput (EHT) signaling (EHT-SIG) field, an EHT short training field (EHT-STF), an EHT long training field (EHT-LTF) and a data field,
wherein the at least one of the first PPDU and the second PPDU is transmitted or received with:
the EHT-STF and the EHT-LTF transmitted over an entirety of an operating bandwidth, and
at least the U-SIG field and the EHT-SIG field duplicated in multiple subchannels over the operating bandwidth, and
wherein at least two bits in the L-Header are set to indicate a presence of a U-SIG field, and wherein the U-SIG field, duplicated in multiple subchannels of the operating bandwidth, is transmitted prior to the EHT-STF in the at least one of the first PPDU and the second PPDU.
14 . The apparatus of claim 13 , wherein the at least one of the first PPDU and the second PPDU and the respective preamble thereof is at least partially backward compatible with one or more preexisting PPDU formats and preambles in accordance with either or both of Institute of Electrical and Electronics Engineers (IEEE) 802.11ad and IEEE 802.11ay specifications.
15 . The apparatus of claim 13 , wherein one of the first PPDU and the second PPDU and the respective preamble thereof is not backward compatible with one or more preexisting PPDU formats and preambles in accordance with either or both of Institute of Electrical and Electronics Engineers (IEEE) 802.11ad and IEEE 802.11ay specifications, and wherein either or both of a respective preamble and a PPDU format in accordance with Institute of Electrical and Electronics Engineers (IEEE) 802.11n, IEEE 802.11ac, IEEE 802.11ax or IEEE 802.11be are used for the preamble or PPDU format of the one of the first PPDU and the second PPDU.
16 . The apparatus of claim 15 , wherein, responsive to a single-user multiple-input-multiple-output (SU-MIMO) transmission with a number of spatial streams up to 4 being supported, the respective preamble and PPDU format in a high-throughput (HT) system in accordance with the IEEE 802.11n specifications are used for the preamble and PPDU format of the one of the first PPDU and the second PPDU.
17 . The apparatus of claim 15 , wherein, responsive to a multi-user multiple-input-multiple-output (MU-MIMO) transmission over an entirety of a transmission channel bandwidth without orthogonal frequency-divisional multiple access (OFDMA) being supported, the respective preamble and PPDU format in a very-high-throughput (VHT) system in accordance with the IEEE 802.11ac specifications are used for the preamble and PPDU format of the one of the first PPDU and the second PPDU.
18 . The apparatus of claim 15 , wherein, responsive to a large resource unit (RU)-based transmission with orthogonal frequency-divisional multiple access (OFDMA) being supported, the respective preamble and PPDU format in accordance with the IEEE 802.11ax specifications are used for the preamble and PPDU format of the one of the first PPDU and the second PPDU.
19 . The apparatus of claim 15 , wherein, responsive to a large resource unit (RU) or multi-resource unit (MRU)-based transmission with orthogonal frequency-divisional multiple access (OFDMA) being supported, the respective preamble and PPDU format in accordance with the IEEE 802.11be specifications are used for the preamble and PPDU format of the one of the first PPDU and the second PPDU.
20 . The apparatus of claim 15 , wherein the one of the first PPDU and the second PPDU contains a plurality of fields comprising a legacy short training field (L-STF), a legacy long training field (L-LTF), a signaling (SIG) field, a short training field (STF), a long training field (LTF) and a data field, and wherein, responsive to a transmission channel bandwidth being greater than 80 MHz or 160 MHz or 320 MHz, the STF, LTF and data field are transmitted over an entirety of a transmission channel bandwidth without duplication while the L-STF, L-LTF and SIG field are transmitted in multiple 320 MHz subchannels duplicated over the entirety of the transmission channel bandwidth.