Method and wireless sensor platform for establishing pair-wise communication

• US 20040125811A1
• Filed: 12/27/2002
• Published: 07/01/2004
• Est. Priority Date: 12/27/2002
• Status: Abandoned Application

• Current Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Chin, Kwan Wu, Raad, Raad
• Application Number:
  US10/330,721
• Publication Number:
  US 20040125811A1
• Time in Patent Office: Days
• US Class Current: 370/400
• CPC Class Codes: H04L 1/1607 Details of the supervisory signal
• CPC Class Codes: H04W 74/08 Non-scheduled access, e.g. ALOHA hybrid access H04W74/02

Abstract

A method for a wireless sensor platform (10) establishing a pair-wise communication channel with an acknowledge platform by firstly transmitting a channel establishing request message (32) and then receiving an acknowledge message (33), having at least one requirement, from the acknowledge platform. Thereafter, the platform (10) determines a request decision message (37) indicating if a channel should be established with the acknowledge platform if the requirement is acceptable to the platform (10). The platform (10) then performs transmitting the request decision message (38) to the acknowledge platform and then another acknowledge signal is received (40) from the acknowledge platform thereby confirming pair-wise communication of the platform (10) with the acknowledge platform at pseudo-random communication rendezvous times based on a shared seed communicated between the platform (10) and the acknowledge platform.

Claims

1. A method for a requesting node establishing a pair-wise communication channel with another node, the method comprising:

(i) Transmitting a channel establishing request message from the requesting node;

(ii) Receiving an acknowledge decision message from an acknowledge node the acknowledge decision message having at least one pair-wise communication channel requirement associated therewith;

(iii) Determining a request decision message indicating if a channel is to be established with the acknowledge node, said request decision message indicating acceptance of the establishing acknowledge decision message if said requirement is acceptable to the requesting node; and

(v) Transmitting said request decision message to said acknowledge node thereby confirming establishment of said pair-wise communication channel between said requesting node and said acknowledge node at communication rendezvous times based on shared information communicated between said requesting node and said acknowledge node.

2. A method, as claimed in claim 1, including a further step of (v) receiving a confirmation acknowledge message from said acknowledge node the confirmation acknowledge message confirming receipt of the request decision message by the acknowledge node.

3. A method, as claimed in claim 1, further characterized by said (i) transmitting step transmitting establishment rendezvous timing information and said steps (ii) to (iv) being effected during at least one time period associated with said establishment rendezvous timing information.

4. A method, as claimed in claim 1, further characterized by said (i) transmitting step transmitting establishment rendezvous timing information indicative of when said requesting node will continue to effect said establishing a pair-wise communication channel.

5. A method, as claimed in claim 1, wherein a set of known timing establishment information of neighbor nodes that have communicated with the requesting node is communicated from said requesting node to said acknowledge node during said (iv) transmitting step, the set of known timing establishment information indicating when a said neighbor nodes will be attempting to establish pair-wise communication channels.

6. A method, as claimed in claim 1, wherein a set of known timing establishment information of neighbor nodes that have communicated with the requesting node is communicated from said requesting node to said acknowledge node during said (i) transmitting step, the set of known timing establishment information indicating when a said neighbor nodes will be attempting to establish pair-wise communication channels.

7. A method, as claimed in claim 1, wherein a set of known timing establishment information of neighbor nodes that have communicated with the acknowledge node is communicated from the acknowledge node to the requesting node during said (ii) receiving step the set of known timing establishment information indicating when a said neighbor nodes will be attempting to establish pair-wise communication channels.

8. A method, as claimed in claim 2, wherein a set of known timing establishment information of neighbor nodes that have communicated with the acknowledge node is communicated from said acknowledge node to said requesting node during the (v) receiving a confirmation message step, the set of known timing establishment information indicating when a said neighbor nodes will be attempting to establish pair-wise communication channels.

9. A method, as claimed in claim 1, wherein the shared information is communicated from said requesting node to said acknowledge node during said (iv) transmitting step.

10. A method, as claimed in claim 1, wherein the shared information may be suitably communicated from said requesting node to said acknowledge node during said (i) transmitting step.

11. A method, as claimed in claim 1, wherein the shared information may be suitably communicated from said acknowledge node to said requesting node during said (ii) receiving step.

12. A method, as claimed in claim 2, wherein the shared information may be suitably communicated from said acknowledge node to said requesting node during said step of (v) receiving a confirmation message.

13. A method, as claimed in claim 1, wherein, said shared information is at last one shared seed.

14. A method, as claimed in claim 1, wherein time intervals between commencements of consecutive said communication rendezvous times vary.

15. A method, as claimed in claim 1, wherein said time intervals may vary in pseudo-randomly.

16. A method, as claimed in claim 1, wherein said requirement is based on at least one requested average rendezvous period and wherein said (iii) determining step includes determining an acceptable average rendezvous period that is longer than said requested average rendezvous period thereby said decision message includes the acceptable average rendezvous period.

17. A method for an acknowledge node establishing a pair-wise communication channel with a requesting node, the method comprising:

(x) Receiving a channel establishing request message from the requesting node;

(xi) Determining an acknowledge decision message indicating if a channel is to be established with the requesting node, said acknowledge decision message indicating acceptance of the establishing request message if at least one pre-defined condition is satisfied;

(xii) Transmitting said acknowledge decision message; and

(xiii) Receiving a request decision message from said requesting node in response to the (xii) transmitting step transmitting said acknowledge decision message indicating said acceptance thereby confirming establishment of said pair-wise communication channel between said requesting node and said acknowledge node at communication rendezvous times based on shared information communicated between said requesting node and said acknowledge node.

18. A method, as claimed in claim 17, further characterized by said (x) receiving step receiving establishment rendezvous timing information and said steps (xi) to (xiii) being effected during at least one time period associated with said establishment rendezvous timing information.

19. A method, as claimed in claim 17, wherein a set of known timing establishment information of neighbor nodes that have communicated with the requesting node is communicated from said requesting node to said acknowledge node during said (xiii) receiving step, the set of known timing establishment information indicating when a said neighbor nodes will be attempting to establish pair-wise communication channels.

20. A method, as claimed in claim 17, wherein a set of known timing establishment information of neighbor nodes that have communicated with the requesting node is communicated from said requesting node to said acknowledge node during said (x) receiving step, the set of known timing establishment information indicating when a said neighbor nodes will be attempting to establish pair-wise communication channels.

21. A method, as claimed in claim 17, wherein a set of known timing establishment information of neighbor nodes that have communicated with the acknowledge node is communicated from the acknowledge node to the requesting node during said (xii) transmitting step, the set of known timing establishment information indicating when a said neighbor nodes will be attempting to establish pair-wise communication channels.

22. A method, as claimed in claim 17, wherein the set of known timing establishment information is a set of seeds.

23. A method, as claimed in claim 17, wherein the shared information is communicated from said requesting node to said acknowledge node during said (xiii) receiving step.

24. A method, as claimed in claim 17, wherein the shared information may be suitably communicated from said requesting node to said acknowledge node during said (x) receiving step.

25. A method, as claimed in claim 17, wherein the shared information is communicated from said requesting node to said acknowledge node during said (xiv) effecting step.

26. A method, as claimed in claim 17, wherein said shared information is at least one shared seed.

27. A method, as claimed in claim 17, wherein time intervals between commencements of consecutive said rendezvous times vary.

28. A wireless sensor platform, comprising:

a wireless transceiver; and

a processor operatively coupled to the wireless transceiver and having at least a pair-wise communication establishing mode of operation and communicating data mode of operation, wherein the pair-wise communication establishing mode of operation comprises effecting a channel establishment for allowing said communicating data mode of operation of said wireless sensor platform with another wireless sensor platform at communication rendezvous times based on shared information communicated between said wireless sensor platform and another wireless sensor platform.

29. A wireless sensor platform, as claimed in claim 28, wherein the wireless sensor platform has a high duty cycle section coupled to a low duty cycle section, and wherein low duty cycle section includes the processor and transceiver.

30. A wireless sensor platform, as claimed in claim 29, wherein the high duty cycle section includes a sensor.

31. A wireless sensor platform, as claimed in claim 30, wherein the high duty section includes a sampler coupled to the sensor.

32. A wireless sensor platform, as claimed in claim 28, wherein said shared information is at least one shared seed.