Method, apparatus, and computer readable medium for signaling high efficiency packet formats using a legacy portion of the preamble in wireless local-area networks

• US 9,847,896 B2
• Filed: 06/23/2015
• Issued: 12/19/2017
• Est. Priority Date: 01/21/2015
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Intel IP Corporation (Intel Corporation)
• Inventors: Azizi, Shahrnaz, Stacey, Robert J., Kenney, Thomas J., Perahia, Eldad
• Primary Examiner(s): Orgad, Edan
• Assistant Examiner(s): Song, Rebecca
• Application Number:
  US14/747,191
• Publication Number:
  US 20160212001A1
• Time in Patent Office: 910 Days
• Field of Search: None
• CPC Class Codes: H04L 1/00 Arrangements for detecting or preventing errors in the information received correcting synchronisation H04L7/00
• CPC Class Codes: H04L 1/08 by repeating transmission, e.g. Verdan system H04L1/1858 and H04L1/189 take precedence
• CPC Class Codes: H04L 27/2603 Signal structure ensuring backward compatibility with legacy system
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

A high-efficiency (HE) wireless local area network (HEW) device including circuitry is disclosed. The circuitry may be configured generate a HE packet comprising a legacy signal field (L-SIG) followed by one or more HE signal fields, where the one or more HE signal fields include a HE-SIG-A field, and where a modulation and coding scheme (MCS) sub-field of the HE-SIG-A field jointly signals a MCS and one or more other sub-fields. The one or more other sub-fields may be a low-density parity check (LDPC) or a space-time block coding (STBC). The circuitry may be configured to generate the L-SIG to signal to the one or more HEW devices either a first packet format of the HE packet or a second packet format of the HE packet, where a length of the L-SIG modulo 3 is used to signal the first packet format or the second packet format.

Claims

1. An apparatus of a high-efficiency (HE) wireless device, comprising:

memory; and

circuitry coupled to the memory, the circuitry configured to;

generate a HE packet comprising a legacy signal field (L-SIG) followed by one or more HE signal fields, wherein the one or more HE signal fields comprises a HE-SIG-A field, and wherein each value of a modulation and coding scheme (MCS) sub-field of the HE-SIG-A field indicates both a MCS and one or more other parameters, wherein the HE packet is a trigger frame to one or more HE devices, the trigger frame comprising a duration and frequency allocation for each of the one or more HE devices for a transmit opportunity;

configure the HE wireless device to transmit the HE packet to the one or more HE wireless devices; and

generate a second HE packet without the L-SIG field within the transmit opportunity.

2. The apparatus of the HE wireless device of claim 1, wherein the one or more other parameters are from the following group:

a low-density parity check (LDPC) and a space-time block coding (STBC).

3. The apparatus of the HE wireless device of claim 1, wherein the circuitry is further configured to:

generate the L-SIG to signal to the one or more HE wireless devices either a first packet format of the HE packet or a second packet format of the HE packet, wherein a length of the L-SIG modulo 3 is used to signal the first packet format or the second packet format.

4. The apparatus of the HE wireless device of claim 3, wherein the first packet format or the second packet format of the HE packet is at least one from the following group:

a single user format or a multiple user format; and

,

an indoor format or an outdoor format.

5. The apparatus of the HE wireless device of claim 4, wherein the circuitry is to configure a length field of the L-SIG to be a one or two modulo of three (MOD 3) to indicate the first packet format or the second packet format.

6. The apparatus of the HE wireless device of claim 4, wherein the single user format and the multiple user format indicate at least a number of HE-SIG-B symbols.

7. The apparatus of the HE wireless device of claim 4, wherein the indoor format and the outdoor format indicate a guard interval for a HE-SIG-B and a HE-long training field (LTF) symbol size.

8. The apparatus of the HE wireless device of claim 1, wherein the circuitry is to generate a duplicated L-SIG field with a polarity difference to indicate a third packet configuration of the HE packet or a fourth packet configuration of the HE packet.

9. The apparatus of the HE wireless device of claim 8, wherein third packet configuration or the fourth packet configuration are one from the following group:

a single user configuration or a multiple user configuration; and

,

an indoor configuration or an outdoor configuration.

10. The apparatus of the HE wireless device of claim 1, wherein the circuitry further comprises processing circuitry and transceiver circuitry.

11. The apparatus of the HE wireless device of claim 10, wherein the circuitry is configured to operate in accordance with orthogonal frequency division multiple access (OFDMA) and Institute of Electronic and Electrical Engineers (IEEE) 802.11ax.

12. The apparatus of the HE wireless device of claim 1, wherein the HE wireless device is one from the following group:

an access point, a master station, and a HE station.

13. The apparatus of the HE wireless device of claim 1, wherein the one or more HE signal fields comprise at least one from the following group:

a clear channel assessment (CCA) margin/densification and length ambiguity.

14. The apparatus of the HE wireless device of claim 1, further comprising memory coupled to the circuitry;

and

one or more antennas coupled to the circuitry.

15. The apparatus of claim 1, wherein the memory is configured to store the HE packet.

16. A method to signal a packet configuration performed by an apparatus of a high-efficiency (HE) wireless device, the method comprising:

generating a HE packet comprising a legacy signal field (L-SIG) followed by one or more HE signal fields, wherein the one or more HE signal fields comprises a HE-SIG-A field, and wherein each value of a modulation and coding scheme (MCS) sub-field of the HE-SIG-A field indicates both a MCS and one or more other parameters, wherein the HE packet is a trigger frame to one or more HE devices, the trigger frame comprising a duration and frequency allocation for each of the one or more HE devices for a transmit opportunity;

configuring the HE wireless device to transmit the HE packet one or more HE devices; and

generating a second HE packet without the L-SIG field within the transmit opportunity.

17. The method of claim 16, wherein the one or more other parameters are from the following group:

a low-density parity check (LDPC) and a space-time block coding (STBC).

18. The method of claim 16, further comprising:

generating the L-SIG to signal to the one or more HE devices either a first packet format of the HE packet or a second packet format of the HE packet, wherein a length of the L-SIG modulo 3 is used to signal the first packet format or the second packet format.

19. An apparatus of a high-efficiency (HE) station comprising:

memory; and

, circuitry coupled to the memory, wherein the circuitry configured to;

receive a packet from a second HE station, the packet to include at least a legacy signal field (L-SIG);

determine whether the L-SIG indicates that the packet is a HE packet;

defer based on information in the L-SIG if the L-SIG indicates that the packet is not the HE-packet; and

if the L-SIG indicates that the packet is the HE-packet, determine from values of one sub-field of one or more HE signal fields a modulation and coding scheme (MCS) for a data portion of the packet and a low-density parity check (LDPC) or a space-time block coding (STBC) from the one sub-field of the one or more HE signal fields, wherein the HE-packet comprises the one or more HE signal fields, wherein the packet is a trigger frame, and wherein the trigger frame comprises an address of the HE station, a duration, and a frequency allocation for the HE station to a transmit a second packet to the second HE station within a transmission opportunity;

configure the HE wireless device to transmit the second packet to the second HE station in accordance with the duration and the frequency allocation; and

decode a third packet from the second HE station, the third packet not including the L-SIG field, wherein the third packet is received within the transmit opportunity.

20. The apparatus of the HE station of claim 19, wherein the one or more HE signal fields comprise a HE-SIG-A field and wherein the HE-SIG-A field comprises the one sub-field.

21. The apparatus of the HE station of claim 19, wherein the circuitry configured to:

determine whether the packet is a first packet format of the HE packet or a second packet format of the HE packet, wherein a length of the L-SIG modulo 3 is used to signal the first packet format or the second packet format.

22. The apparatus of the HE station of claim 19, comprising

one or more antennas coupled to the circuitry.

23. A non-transitory computer-readable storage medium that stores instructions for execution by one or more processors of an apparatus of a high-efficiency (HE) master station the operations to configure the one or more processors to cause the HE master station to:

generate a HE packet comprising a legacy signal field (L-SIG) followed by one or more HE signal fields, wherein the one or more HE signal fields comprises a HE-SIG-A field, and wherein each value of a modulation and coding scheme (MCS) sub-field of the HE-SIG-A field indicates both a MCS and one or more other parameters, wherein the HE packet is a trigger frame to one or more HE devices, the trigger frame comprising a duration and frequency allocation for each of the one or more HE devices for a transmit opportunity;

configure the HE master station to transmit the HE packet to one or more HE devices; and

generate a second HE packet without the L-SIG field within the transmit opportunity.

24. The non-transitory computer-readable storage medium of claim 23, wherein the one or more other parameters are from the following group:

a low-density parity check (LDPC) and a space-time block coding (STBC).

25. The non-transitory computer-readable storage medium of claim 23, wherein the instructions are further configured to cause the to:

generate the L-SIG to signal to the one or more HE devices either a first packet format of the HE packet or a second packet format of the HE packet, wherein a length of the L-SIG modulo 3 is used to signal the first packet format or the second packet format.