Wireless network including request to trigger function

• US 20090225731A1
• Filed: 03/10/2008
• Published: 09/10/2009
• Est. Priority Date: 03/10/2008
• Status: Abandoned Application

• Current Assignee: Nokia Corporation
• Original Assignee: Nokia Corporation
• Inventors: Kasslin, Mika, Marin, Janne, Kneckt, Jarkko
• Application Number:
  US12/075,368
• Publication Number:
  US 20090225731A1
• Time in Patent Office: Days
• US Class Current: 370/338
• CPC Class Codes: H04L 1/1685 the supervisory signal being transmitted in response to a specific request, e.g. to a polling signal
• CPC Class Codes: H04L 2001/0093 Point-to-multipoint
• CPC Class Codes: H04L 2001/0097 Relays
• CPC Class Codes: H04W 52/0216 using a pre-established activity schedule, e.g. traffic indication frame
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: Y02D 30/70 in wireless communication networks

Abstract

In one aspect thereof the invention provides a method that includes transmitting a beacon frame from a first mesh point to a second mesh point; determining if a trigger frame is received at the first mesh point within some predetermined period of time from the second mesh point and, if the trigger frame is not received, transmitting a request to trigger frame from the first mesh point to the second mesh point. In another aspect thereof the invention provides a method that includes receiving a request to trigger frame at a first mesh point from a second mesh point and in response, transmitting an acknowledgment to the request to trigger frame to the second mesh point. A computer-readable medium storing program instructions to implement the methods is also disclosed, as are corresponding apparatus.

Claims

1. A method, comprising:

transmitting a beacon frame from a first mesh point to a second mesh point;

determining if a trigger frame is received at the first mesh point within some predetermined period of time from the second mesh point; and

if the trigger frame is not received, transmitting a request to trigger frame from the first mesh point to the second mesh point.

2. The method of claim 1, further comprising determining if an acknowledgment to the request to trigger frame is received from the second mesh point and, if it is not, re-transmitting at least once the request to trigger frame.

3. The method of claim 1, where the request to trigger frame is transmitted as a unicast management frame.

4. The method of claim 1, where if an acknowledgment to the request to trigger frame is not received from the second mesh point, placing the first mesh point in a reduced power consumption mode of operation.

5. The method of claim 1, where if an acknowledgment to the request to trigger frame is received from the second mesh point, maintaining the first mesh point in a current power consumption mode of operation.

6. The method of claim 1, where an acknowledgment to the request to trigger frame is received from the second mesh point, the acknowledgment comprising a trigger frame.

7. A computer-readable medium that stores program instructions, the execution of which results in operations that comprise:

transmitting a beacon frame from a first mesh point to a second mesh point;

determining if a trigger frame is received at the first mesh point within some predetermined period of time from the second mesh point; and

if the trigger frame is not received, transmitting a request to trigger frame from the first mesh point to the second mesh point.

8. The computer-readable medium of claim 7, further comprising determining if an acknowledgment to the request to trigger frame is received from the second mesh point and, if it is not, re-transmitting at least once the request to trigger frame.

9. The computer-readable medium of claim 7, where the request to trigger frame is transmitted as a unicast management frame.

10. The computer-readable medium of claim 7, where if an acknowledgment to the request to trigger frame is not received from the second mesh point, further comprising an operation of placing the first mesh point in a reduced power consumption mode of operation.

11. The computer-readable medium of claim 7, where if an acknowledgment to the request to trigger frame is received from the second mesh point, further comprising an operation of maintaining the first mesh point in a current power consumption mode of operation.

12. The computer-readable medium of claim 7, where an acknowledgment to the request to trigger frame is received from the second mesh point, the acknowledgment comprising a trigger frame.

13. An apparatus, comprising:

a wireless transmitter that comprises part of a first mesh point;

a wireless receiver that comprises part of the first mesh point; and

a control unit configurable to transmit a beacon frame from the first mesh point to a second mesh point, to determine if a trigger frame is received from the second mesh point within some predetermined period of time and, if the trigger frame is not received, to transmit a request to trigger frame to the second mesh point.

14. The apparatus of claim 13, said control unit being further configurable to determine if an acknowledgment to the request to trigger frame is received from the second mesh point and, if it is not, to re-transmit at least once the request to trigger frame.

15. The apparatus of claim 13, where the request to trigger frame is transmitted as a unicast management frame.

16. The apparatus of claim 13, where if an acknowledgment to the request to trigger frame is not received from the second mesh point, said control unit is further configurable to place the first mesh point in a reduced power consumption mode of operation.

17. The apparatus of claim 13, where if an acknowledgment to the request to trigger frame is received from the second mesh point, said control unit is further configurable to maintain the first mesh point in a current power consumption mode of operation.

18. The apparatus of claim 13, where an acknowledgment to the request to trigger frame that is received from the second mesh point comprises a trigger frame.

19. A method, comprising:

receiving a request to trigger frame at a first mesh point from a second mesh point; and

in response, transmitting an acknowledgment to the request to trigger frame to the second mesh point.

20. The method of claim 19, where the acknowledgment comprises a trigger frame.

21. A computer-readable medium that stores program instructions, the execution of which results in operations that comprise:

receiving a request to trigger frame at a first mesh point from a second mesh point; and

in response, transmitting an acknowledgment to the request to trigger frame to the second mesh point.

22. The computer-readable medium of claim 21, where the acknowledgment comprises a trigger frame.

23. An apparatus, comprising:

a wireless transmitter that comprises part of a first mesh point;

a wireless receiver that comprises part of the first mesh point; and

a control unit configurable to respond to a receipt of a request to trigger frame from a second mesh point by transmitting an acknowledgment to the request to trigger frame to the second mesh point.

24. The apparatus of claim 23, where the acknowledgment comprises a trigger frame.