Method and system to detect packets of different formats

• US 8,976,674 B2
• Filed: 02/11/2011
• Issued: 03/10/2015
• Est. Priority Date: 09/21/2009
• Status: Active Grant

• Current Assignee: MediaTek, Inc.
• Original Assignee: MediaTek, Inc.
• Inventors: Pare, Thomas E. Jr., Uln, Kiran
• Primary Examiner(s): Jaroenchonwanit, Bunjob
• Application Number:
  US13/026,128
• Publication Number:
  US 20120039315A1
• Time in Patent Office: 1,488 Days
• Field of Search: None
• US Class Current: 370/241
• CPC Class Codes: H04L 27/0012 arrangements for identifying the type of modulation
• CPC Class Codes: H04L 27/2613 Structure of the reference signals
• CPC Class Codes: H04L 27/26136 Pilot sequence conveying additional information

Abstract

A method and system in accordance with the present invention presents a new packet structure and an improved method for detecting the packet. The method and system comprise adding an additional field to the packet structure to allow for a sufficient time to process a very high throughput (VHT) signal field; and enabling the detection of the VHT signal field of the packet structure. The VHT signal field is distinguishable from other signal fields and the VHT signal field allows for a backward compatibility with other devices.

Claims

1. A method of communicating packets of different formats in a transmitter, the method comprising:

adding an additional field in a packet structure, wherein the additional field is used to allow for a sufficient time to process a VHT signal field before processing a VHT short training field (VHT-STF) in a detection of the VHT signal field; and

,

enabling the detection of the VHT signal field of the packet structure, wherein the VHT signal field is distinguishable from other signal fields;

wherein, the VHT signal field allows for a backward compatibility with other devices, wherein the additional field comprises source address information for allowing a particular client to discriminate between different type packets.

2. The method of claim 1, wherein adding the additional field between the VHT signal field and the VHT-STF of the packet structure,

and the additional field comprises an additional short training field.

3. The method of claim 1 whereby the transmitter transmits at least one signal field symbol and is capable of transmitting a plurality of 802.11 signal fields, the plurality of 802.11 signal fields including the VHT signal field.

4. The method of claim 1 wherein the VHT signal field comprises 90 degree rotated binary phase shift keying (BPSK) subcarriers.

5. The method of claim 4 wherein the BPSK rotation is on alternating subcarriers.

6. The method of claim 1 wherein the additional field includes additional user specific information.

7. The method of claim 1 wherein the additional field includes a user MAC address, or similar identifying information that indicates the intended client for an incoming packet.

8. A computer program product stored on a non-transitory computer readable medium for causing a computer to control an execution of an application to perform a method for communicating packets of different formats in a transmitter, the transmitter comprising a signal field;

comprising;

adding an additional field between a very high throughput (VHT) signal field and a VHT short training field (VHT-STF) of a packet structure, the additional field is used to allow for a sufficient time to process a VHT signal field before processing the VHT-STF in a detection of the VHT signal field;

enabling the detection of a VHT signal field wherein the VHT signal field is distinguishable from other signal fields;

wherein the VHT signal field allows for a backward compatibility other devices, and the additional field comprises source address information for allowing a particular client to discriminate between different type packets.

9. The computer program product of claim 8 wherein the additional field comprises additional user specific information.

10. The computer program product of claim 8 wherein the additional field includes a user MAC address, or equivalent identifying information, that indicates the intended client for an incoming packet.

11. The computer program product of claim 8 wherein the additional field comprises an additional short training field.