Method and apparatus for distributing beacon information

• US 8,780,871 B2
• Filed: 11/22/2006
• Issued: 07/15/2014
• Est. Priority Date: 01/17/2006
• Status: Expired due to Fees

• Current Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Original Assignee: Interdigital Technology Corporation (InterDigital, Inc.)
• Inventors: Grandhi, Sudheer A., Chandra, Arty, Zeira, Eldad M., Levy, Joseph S.
• Primary Examiner(s): Kasraian, Allahyar
• Application Number:
  US11/562,483
• Publication Number:
  US 20070167140A1
• Time in Patent Office: 2,792 Days
• Field of Search: 370/329, 370/338, 370/312, 370/313, 370/349, 709/227, 709/228, 709/246
• US Class Current: 370/338
• CPC Class Codes: H04W 48/12 using downlink control channel

Abstract

A method and apparatus are described for distributing beacon information. A first WTRU modifies a physical layer protocol data unit (PHY PDU) frame to include beacon information. The first WTRU transmits the modified PHY PDU frame to a second WTRU. The second WTRU receives the modified PHY PDU frame and extracts beacon information from the modified PHY PDU frame. The second WTRU associates with the first WTRU.

Claims

1. A method for use in a first mobile station (STA) for distributing beacon information, the method comprising:

modifying, at the first mobile STA, a physical layer protocol data unit (PHY PDU) frame having a physical layer convergence protocol (PLCP) preamble field and a PLCP header, by including at least one beacon information element between the PLCP preamble field and the PLCP header, including an indicator in the PLCP preamble field to indicate whether the modified PHY PDU frame is transmitted by a mobile STA or an access point (AP), and including a field in the PLCP header to identify presence and type of the at least one beacon information element; and

transmitting the modified PHY PDU frame to a second mobile STA.

2. The method of claim 1 wherein the at least one beacon information element is included in a non-beacon control packet, a data packet or a management packet.

3. The method of claim 1 wherein the at least one beacon information element includes information relating to any one of the following:

a time stamp, a beacon interval, a service set identifier (SSID) capability, a supported data rate, a frequency hopping (FH) parameter, a coordination function (CF) parameter, or a direct sequence (DS) parameter.

4. The method of claim 1 wherein the at least one beacon information element includes fixed beacon information and variable beacon information.

5. The method of claim 4 wherein the variable beacon information is included in a variable information frame.

6. The method of claim 5 wherein the variable information frame includes an element identifier (ID) field, a length field, and a service set identifier (SSID) field.

7. The method of claim 5 wherein the variable beacon information element includes a service set identifier (SSID) field and a supported rate.

8. The method of claim 4 wherein the fixed beacon information is included in a fixed information frame.

9. The method of claim 8 wherein the fixed information frame includes an element field and a time stamp field.

10. A mobile station (STA) configured to perform a method of distributing beacon information, the mobile STA comprising:

a processor configured to modify a physical protocol data unit (PHY PDU) frame having a physical layer convergence protocol (PLCP) preamble field and a PLCP header, by including at least one beacon information element between the PLCP preamble field and the PLCP header, including an indicator in the PLCP preamble field to indicate whether the modified PHY PDU frame is transmitted by a mobile STA or an access point (AP), and including a field in the PLCP header to identify presence and type of the at least one beacon information element; and

a transmitter configured to transmit the modified PHY PDU frame to at least one other mobile STA.

11. The mobile STA of claim 10 wherein the transmitter is further configured to transmit a plurality of beacon information elements in a single packet.

12. The mobile STA of claim 10 wherein the at least one beacon information element includes fixed beacon information and variable beacon information.

13. The mobile STA of claim 12 wherein the variable beacon information is included in a variable information frame.

14. The mobile STA of claim 12 wherein the fixed beacon information is included in a fixed information frame.

15. A wireless communication method comprising:

modifying a physical layer protocol data unit (PHY PDU) frame by;

including at least one beacon information element between a physical layer convergence protocol (PLCP) preamble field and a PLCP header of the PHY PDU frame;

including an indicator in the PLCP preamble field to indicate whether the modified PHY PDU frame is transmitted by a mobile station (STA) or an access point (AP); and

including a field in the PLCP header to identify presence and type of the at least one beacon information element; and

transmitting the modified PHY PDU frame.