Method and system for wireless local area network (WLAN) long symbol duration migration

• US 10,218,463 B2
• Filed: 03/07/2016
• Issued: 02/26/2019
• Est. Priority Date: 03/06/2015
• Status: Active Grant

• Current Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Original Assignee: InterDigital Patent Holdings, Inc. (InterDigital, Inc.)
• Inventors: Lou, Hanqing, Oteri, Oghenekome, Yang, Rui, Olesen, Robert L., Zhang, Guodong
• Primary Examiner(s): Elallam, Ahmed
• Application Number:
  US15/555,786
• Publication Number:
  US 20180048427A1
• Time in Patent Office: 1,086 Days
• CPC Class Codes: H04L 1/0072 Error control for data other than payload data, e.g. control data
• CPC Class Codes: H04L 1/0079 Formats for control data H04L1/16 takes precedence; training sequences H04L25/00 and H04L27/00
• CPC Class Codes: H04L 1/18 Automatic repetition systems, e.g. Van Duuren systems
• CPC Class Codes: H04L 2101/622 Layer-2 addresses, e.g. medium access control [MAC] addresses
• CPC Class Codes: H04W 84/12 WLAN [Wireless Local Area Networks]

Abstract

A STA may perform packet detection to detect a packet and decode a legacy preamble of the detected packet including a legacy short training field (L-STF), a legacy long training field (L-LTF), and a legacy signal (L-SIG) field. The STA may decode a high efficiency signal A (HE-SIG-A) field to obtain a first partial association identifier (PAID) comprising group information. If the decoded group information matches group information stored in a memory of the STA, the STA may decode a high efficiency (HE) preamble and a high efficiency signal B (HE-SIG-B) field of the detected packet. The HE-SIG-B field may include a station identifier within the group. When the group information is combined with the station identifier, the STA may determine an accurate address.

Claims

1. A method for supporting early detection of a frame by a station (STA), the method comprising:

receiving, in a high efficiency signal A (HE-SIG-A) field of the frame, an indication of transmission opportunity (TXOP) duration and an indication of a modulation and coding scheme (MCS) of a high efficiency signal B (HE-SIG-B) field of the frame;

decoding the HE-SIG-B field based on the indicated MCS, wherein the HE-SIG-B field comprises a common field and a field indicative of a STA identifier; and

on a condition the field indicative of the STA identifier of the HE-SIG-B field matches an identifier of the STA, decoding a payload of the frame.

2. The method of claim 1, wherein the MCS of the HE-SIG-B field is higher than an MCS of the HE-SIG-A field.

3. The method of claim 1, wherein the MCS of the HE-SIG-B field is the same as an MCS of the received HE-SIG-A field.

4. The method of claim 1, wherein the MCS of the HE-SIG-B field is lower than an MCS of the HE-SIG-A field.

5. The method of claim 1, wherein the HE-SIG-B field includes an information field, wherein the information field comprises information corresponding to a plurality of encoders.

6. The method of claim 5, wherein at least one of the plurality of encoders corresponds to a decoder of the STA.

7. The method of claim 1, wherein the STA is a non access point (non-AP) STA configured for multi user multiple-input multiple-output (MU-MIMO) wireless communication.

8. The method of claim 1, wherein the frame is a high efficiency (HE) physical (PHY) layer convergence procedure (PLCP) protocol data unit (PPDU).

9. A station (STA) configured to support early detection of a frame, the STA comprising:

a receiver configured to receive, in a high efficiency signal A (HE-SIG-A) field of the frame, an indication of transmission opportunity (TXOP) duration and an indication of a modulation and coding scheme (MCS) of a high efficiency signal B (HE-SIG-B) field of the frame;

a decoder configured to decode the HE-SIG-B field based on the indicated MCS, wherein the HE-SIG-B field comprises a common field and a field indicative of a STA identifier; and

the decoder further configured to decode, on a condition the field indicative of the STA identifier of the HE-SIG-B field matches an identifier of the STA, a payload of the frame.

10. The STA of claim 9, wherein the MCS of the HE-SIG-B field is higher than an MCS of the HE-SIG-A field.

11. The STA of claim 9, wherein the MCS of the HE-SIG-B field is the same as an MCS of the received HE-SIG-A field.

12. The STA of claim 9, wherein the MCS of the HE-SIG-B field is lower than an MCS of the HE-SIG-A field.

13. The STA of claim 9, wherein the HE-SIG-B field includes an information field, wherein the information field comprises information corresponding to a plurality of encoders.

14. The STA of claim 13, wherein at least one of the plurality of encoders corresponds to a decoder of the STA.

15. The STA of claim 9, wherein the STA is a non access point (non-AP) STA configured for multi user multiple-input multiple-output (MU-MIMO) wireless communication.

16. The STA of claim 9, wherein the frame is a high efficiency (HE) physical (PHY) layer convergence procedure (PLCP) protocol data unit (PPDU).

17. A method performed by an access point (AP), the method comprising:

transmitting a frame, from the AP to a station (STA), wherein the frame comprises a high efficiency signal A (HE-SIG-A) field and a high efficiency signal B (HE-SIG-B) field;

wherein the HE-SIG-A field comprises an indication of a transmission opportunity (TXOP) duration and an indication of a modulation and coding scheme (MCS) of a high efficiency signal B (HE-SIG-B) field of the frame;

wherein the HE-SIG-B field is modulated and coded according to the MCS and comprises a common field and a field indicative of an identifier of the STA;

wherein the frame includes a payload for the STA to decode when the field indicative of the identifier of the STA of the HE-SIG-B field matches an identifier of the STA.

18. The method of claim 17, wherein the MCS of the HE-SIG-B field is higher than an MCS of the HE-SIG-A field.

19. The method of claim 17, wherein the MCS of the HE-SIG-B field is the same as an MCS of the HE-SIG-A field.

20. The method of claim 17, wherein the MCS of the HE-SIG-B field is lower than an MCS of the HE-SIG-A field.