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US 10,951,451 B2Granted
Physical layer protocol data unit transmission method and apparatus
AssigneeHuawei Technologies Co., Ltd.
InventorsMeilu Lin, Yun Liu
Life of this patent
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Abstract
The present disclosure relates to methods, apparatus, and systems for a physical layer protocol data unit (PPDU) transmission. One example method includes generating a PPDU including a signal extension (SE) field arranged after a last orthogonal frequency division multiplexing (OFDM) symbol of a plurality of OFDM symbols, the PPDU including indication information in a high efficiency signaling field (HE-SIG), the indication information being generated based on a symbol length of the SE field and configured to indicate whether a receive end needs to adjust a calculated quantity of the plurality of OFDM symbols, and sending the PPDU to the receive end.
Claims15
A physical layer protocol data unit transmission apparatus, the apparatus applied in a wireless local area network, comprising:
- at least one processor;
- and
- a non-transitory computer-readable storage medium coupled to the at least one processor and storing programming instructions for execution by the at least one processor, wherein the programming instructions instruct the apparatus to:
- generate a physical layer protocol data unit (PPDU), wherein the PPDU comprises a HE-preamble, a HE-data field, and a signal extension (SE) field arranged after the HE-data field including a plurality of orthogonal frequency division multiplexing (OFDM) symbols, and wherein the PPDU comprises an ambiguity indication indicating whether a receive end needs to adjust a calculated quantity of OFDM symbols;
- set a value of the ambiguity indication to a first value when
- T
- SE
- +
- 4
- ×
- (
- ⌈
- T
- HE
-
-
- _
-
-
- PREAMBLE
- +
- T
- HE
-
-
- _
-
-
- DATA
- +
- T
- SE
- 4
- ⌉
- -
- (
- T
- HE
-
-
- _
-
-
- PREAMBLE
- +
- T
- HE
-
-
- _
-
-
- DATA
- +
- T
- SE
- 4
- )
- )
- >
- (
- 12.8
- +
- T
- GI
- )
- is satisfied;
- set a value of the ambiguity indication to a second value when
- T
- SE
- +
- 4
- ×
- (
- ⌈
- T
- HE
-
-
- _
-
-
- PREAMBLE
- +
- T
- HE
-
-
- _
-
-
- DATA
- +
- T
- SE
- 4
- ⌉
- -
- (
- T
- HE
-
-
- _
-
-
- PREAMBLE
- +
- T
- HE
-
-
- _
-
-
- DATA
- +
- T
- SE
- 4
- )
- )
- <
- (
- 12.8
- +
- T
- GI
- )
- is satisfied,
- wherein the second value is different from the first value;
- and
- send the PPDU to the receive end;
- where TSE represents a duration of the SE field;
- TGI represents a duration of a cyclic prefix;
- (12.8+TGI) represents a duration of a 4× OFDM symbol;
- THE_DATA N (12.8+TGI), N being a quantity of 4× OFDM symbols that actually need to be transmitted;
- and
- THE_PREAMBLE represents a duration of the HE-preamble of the PPDU.
136 more elements
A physical layer protocol data unit transmission apparatus, the apparatus applied in a wireless local area network, comprising:
- at least one processor;
- and
- a non-transitory computer-readable storage medium coupled to the at least one processor and storing programming instructions for execution by the at least one processor, wherein the programming instructions instruct the apparatus to:
- generate a physical layer protocol data unit (PPDU), wherein the PPDU comprises a HE-preamble, a HE-data field, and a signal extension (SE) field arranged after the HE-data field including a plurality of orthogonal frequency division multiplexing (OFDM) symbols, and wherein the PPDU comprises an ambiguity indication indicating whether a receive end needs to adjust a calculated quantity of OFDM symbols;
- set a value of the ambiguity indication to a first value when TSE+ΔRE>(12.8+TGI) is satisfied, the ambiguity indication is a first value;
- set a value of the ambiguity indication to a second value when TSE+ΔRE<(12.8+TGI) is satisfied, the second value is different from the first value;
- and
- send the PPDU to the receive end;
- wherein
- Δ
- RE
- =
- ⌈
- T
- HE
-
-
- _
-
-
- PREAMBLE
- +
- T
- HE
-
-
- _
-
-
- DATA
- +
- T
- SE
- -
- 20
- 4
- ⌉
- ×
- 4
- +
- 20
- -
- (
- T
- HE
-
-
- _
-
-
- PREAMBLE
- +
- T
- HE
-
-
- _
-
-
- DATA
- +
- T
- SE
- )
- ;
- or
- Δ
- RE
- =
- ⌈
- T
- HE
-
-
- _
-
-
- PREAMBLE
- +
- T
- HE
-
-
- _
-
-
- DATA
- +
- T
- SE
- 4
- ⌉
- ×
- 4
- -
- (
- T
- HE
-
-
- _
-
-
- PREAMBLE
- +
- T
- HE
-
-
- _
-
-
- DATA
- +
- T
- SE
- )
- ;
- or
- Δ
- RE
- =
- 4
- ×
- (
- ⌈
- T
- HE
-
-
- _
-
-
- PREAMBLE
- +
- T
- HE
-
-
- _
-
-
- DATA
- +
- T
- SE
- 4
- ⌉
- -
- (
- T
- HE
-
-
- _
-
-
- PREAMBLE
- +
- T
- HE
-
-
- _
-
-
- DATA
- +
- T
- SE
- 4
- )
- )
- ;
- TSE represents a transmission duration of the SE field;
- TGI represents a transmission duration of a cyclic prefix;
- (12.8+TGI) represents a transmission duration of a 4× OFDM symbol;
- THE_DATA N (12.8+TGI), N being a quantity of 4× OFDM symbols that actually need to be transmitted;
- and
- THE_PREAMBLE represents a transmission duration of the HE-preamble of the PPDU.
177 more elements
A physical layer protocol data unit transmission apparatus, the apparatus applied in a wireless local area network, comprising:
- at least one processor and a network interface coupled to the at least one processor;
- the at least one processor configured to:
- generate a physical layer protocol data unit (PPDU), wherein the PPDU comprises a legacy preamble field, a HE-preamble, a HE-data field, and a signal extension (SE) field arranged after the HE-data field including a plurality of orthogonal frequency division multiplexing (OFDM) symbols, and wherein the PPDU comprises an ambiguity indication indicating whether a receive end needs to adjust a calculated quantity of OFDM symbols;
- set a value of the ambiguity indication to a first value when TSE+ΔRE>(12.8+TGI) is satisfied;
- and
- set a value of the ambiguity indication to a second value when TSE+ΔRE<(12.8+TGI) is satisfied, wherein the second value is different from the first value;
- and
- the network interface configured to send the PPDU to the receive end;
- wherein
- Δ
- RE
- =
- ⌈
- T
- L
-
-
- _
-
-
- PREAMBLE
- +
- T
- HE
-
-
- _
-
-
- PREAMBLE
- +
- T
- HE
-
-
- _
-
-
- DATA
- +
- T
- SE
- -
- 20
- 4
- ⌉
- ×
- 4
- +
- 20
- -
- (
- T
- L
-
-
- _
-
-
- PREAMBLE
- +
- T
- HE
-
-
- _
-
-
- PREAMBLE
- +
- T
- HE
-
-
- _
-
-
- DATA
- +
- T
- SE
- )
- ;
- or
- Δ
- RE
- =
- ⌈
- T
- L
-
-
- _
-
-
- PREAMBLE
- +
- T
- HE
-
-
- _
-
-
- PREAMBLE
- +
- T
- HE
-
-
- _
-
-
- DATA
- +
- T
- SE
- 4
- ⌉
- ×
- 4
- -
- (
- T
- L
-
-
- _
-
-
- PREAMBLE
- +
- T
- HE
-
-
- _
-
-
- PREAMBLE
- +
- T
- HE
-
-
- _
-
-
- DATA
- +
- T
- HE
-
-
- _
-
-
- DATA
- +
- T
- SE
- )
- ;
- or
- Δ
- RE
- =
- 4
- ×
- (
- ⌈
- T
- L
-
-
- _
-
-
- PREAMBLE
- +
- T
- HE
-
-
- _
-
-
- PREAMBLE
- +
- T
- HE
-
-
- _
-
-
- DATA
- +
- T
- SE
- 4
- ⌉
- -
- (
- T
- L
-
-
- _
-
-
- PREAMBLE
- +
- T
- HE
-
-
- _
-
-
- PREAMBLE
- +
- T
- HE
-
-
- _
-
-
- DATA
- +
- T
- SE
- 4
- )
- )
- ;
- where TSE represents a transmission duration of the SE field;
- TGI represents a transmission duration of a cyclic prefix;
- (12.8+TGI) represents a transmission duration of a 4× OFDM symbol;
- THE_DATA=N·(12.8+TGI), N being a quantity of 4× OFDM symbols that actually need to be transmitted;
- TL_PREAMBLE represents a transmission duration of the legacy preamble field of the PPDU;
- and
- THE_PREAMBLE represents a transmission duration of the HE-preamble of the PPDU.
241 more elements
Dependencies are inferred from the claim text.