DETERMINISTIC POWER-AWARE WIRELESS NETWORK

• US 20070253352A1
• Filed: 05/01/2006
• Published: 11/01/2007
• Est. Priority Date: 05/01/2006
• Status: Abandoned Application

• Current Assignee: Honeywell International Inc.
• Original Assignee: Honeywell International Inc.
• Inventors: Roy, Aloke, Arisha, Khaled
• Application Number:
  US11/381,021
• Publication Number:
  US 20070253352A1
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: H04L 67/04 specially adapted for terminals or networks with limited capabilities; specially adapted for terminal portability
• CPC Class Codes: H04W 52/245 taking into account received signal strength

Abstract

A method to manage an application-layer-managed network. The method includes receiving a received signal strength indication at an application layer of an access node from a media access control layer of the access node, determining if the received signal strength indication or an averaged received signal strength indication are within a selected range of received signal strength indication. The method also includes transmitting a power-level-adjustment signal to the media access control layer based on the determination. The power-level-adjustment signal adjusts a transmission power level of at least one of a plurality of network nodes.

Claims

1. A method to manage an application-layer-managed network, the method comprising:

receiving a received signal strength indication at an application layer of an access node from a media access control layer of the access node;

determining if one of the received signal strength indication and an averaged received signal strength indication is within a selected range of received signal strength indication; and

transmitting a power-level-adjustment signal to the media access control layer based on the determination, the power-level-adjustment signal adapted to adjust a transmission power level of at least one of a plurality of network nodes.

2. The method of claim 1, further comprising:

adjusting the transmission power of the nodes in the network based on the power-level-adjustment signal.

3. The method of claim 1, wherein transmitting the power-level-adjustment signal comprises

embedding the power-level-adjustment signal in a power-control packet.

4. The method of claim 3, the method further comprising:

filtering data packets transmitted between one or more system levels.

5. The method of claim 1, further comprising:

receiving a signal from the at least one of the plurality of network nodes linked to the access node;

transmitting the received signal strength indication of the received signal from the media access control layer of the access node to the application layer of the access node; and

dynamically reconfiguring slot assignments at the media access control layer to avoid collision contention among the plurality of network nodes linked to the access node.

6. The method of claim 5, wherein the dynamically reconfiguring slot assignments comprises:

time-division-multiplexing node signals to and from the plurality of network nodes at the access node; and

controlling signal transmission and signal reception from the media access control layer of the access node.

7. The method of claim 5, further comprising:

receiving a copy of received signals from the media access control layer at the application layer; and

encrypting data on the received signals at the application layer of the access node.

8. The method of claim 7, wherein the encrypting data includes using symmetric cryptography with dynamic key derivation, and wherein the encrypting data comprises:

authenticating data on the received node signals;

generating session keys for the received node signals using a pre-loaded shared secret value;

generating session key derivation information by concatenating the shared session keys with device addresses and access point addresses;

generating message counters, time of invocation and session key usage parameters for the received node signals; and

transmitting the encrypted node signals to the media access control layer.

9. The method of claim 1, further comprising:

receiving a copy of received signals from the media access control layer at the application layer; and

encrypting data on the received signals at the application layer of the access node.

10. The method of claim 9, wherein the encrypting data uses symmetric cryptography with dynamic key derivation and wherein the encrypting comprises:

authenticating data on the received signals;

generating session keys for the received signals using a pre-loaded shared secret value;

generating session key derivation information by concatenating the shared session keys with device addresses and access point addresses;

generating message counters, time of invocation and session key usage parameters for the received node signals; and

transmitting the encrypted node signals to the media access control layer.

11. The method of claim 1, wherein the network nodes are wireless sensors, the method further comprising:

detecting environmental parameters at the network nodes.

12. An application-layer-managed network, the network comprising:

a plurality of network nodes;

an access node having an application layer, the access node communicatively coupled to the plurality of network nodes;

wherein the application layer includes a transmit-power control protocol adapted to control transmission power levels of the plurality of network nodes and the application layer further includes an encryption protocol adapted to provide secure, symmetric cryptography with dynamic key derivation; and

a media access control layer in communication with the application layer of the access node, the media access control layer including protocol for a time division multiple access scheme to prevent signal collisions among the linked network nodes,

wherein the application layer managed network provides energy aware priority and dynamic band width allocation for the linked network nodes communicating encrypted signals.

13. The network of claim 12, wherein the network nodes linked to the access node are wireless sensors capable of detecting environmental parameters.

14. The network of claim 12, wherein the encrypted signals are included in encrypted data packets, wherein the application layer includes a power-aware module, wherein the media access control layer includes a callback mechanism and wherein transmitted and received data packets are filtered by the callback mechanism.

15. A program-product comprising program instructions, embodied on a storage medium, that are adapted to cause a programmable processor to:

receive a received signal strength indication at an application layer of an access node from a media access control layer of the access node;

determine if one of the received signal strength indication and an averaged received signal strength indication is within a selected range of received signal strength indication; and

transmit a power-level-adjustment signal to the media access control layer based on the determination, the power-level-adjustment signal adapted to adjust a transmission power level of at least one of a plurality of network nodes.

16. The program-product of claim 15, further comprising instructions adapted to cause the programmable processor to:

adjust the transmission power of the nodes in the network based on the power-level-adjustment signal.

17. The program-product of claim 16, further comprising instructions adapted to cause the programmable processor to:

filter data packets transmitted between one or more system levels.

18. The program-product of claim 16, further comprising instructions adapted to cause the programmable processor to:

receive a signal from the at least one of the plurality of network nodes linked to the access node;

transmit the received signal strength indication of the received signal from the media access control layer of the access node to the application layer of the access node; and

dynamically reconfigure slot assignments at the media access control layer to avoid collision contention among the plurality nodes linked to the access node.

19. The program-product of claim 16, further comprising instructions adapted to cause the programmable processor to:

receive a copy of received signals from the media access control layer at the application layer; and

encrypt data on the received signals at the application layer of the access node.

20. The program-product of claim 19, further comprising instructions adapted to cause the programmable processor to:

authenticate data on the received signals;

generate session keys for the received signals using a pre-loaded shared secret value;

generate session key derivation information by concatenating the shared session keys with device addresses and access point addresses;

generate message counters, time of invocation and session key usage parameters for the received node signals; and

transmit the encrypted node signals to the media access control layer.