Communication Nodes for Use with an Ad-Hoc Network

• US 20100272026A1
• Filed: 07/08/2010
• Published: 10/28/2010
• Est. Priority Date: 01/15/2002
• Status: Active Grant

• Current Assignee: Intel Corporation
• Original Assignee: Olsonet Communications Corporation
• Inventors: Sendrowicz, Gerry
• Granted Patent: US 7,902,996 B2
• Time in Patent Office: Days
• US Class Current: 370/328
• CPC Class Codes: G08B 21/028 Communication between parent and child units via remote transmission means, e.g. satellite network
• CPC Class Codes: G08B 25/008 Alarm setting and unsetting, i.e. arming or disarming of the security system
• CPC Class Codes: G08B 25/009 Signalling of the alarm condition to a substation whose identity is signalled to a central station, e.g. relaying alarm signals in order to extend communication range
• CPC Class Codes: G08B 25/10 using wireless transmission systems G08B25/009 takes precedence
• CPC Class Codes: G08B 25/14 Central alarm receiver or annunciator arrangements
• CPC Class Codes: G08B 27/003 Signalling to neighbouring houses
• CPC Class Codes: H04L 12/2838 Distribution of signals within a home automation network, e.g. involving splitting/multiplexing signals to/from different paths adaptations of television systems for transmission by electric cable for domestic distribution H04N7/106; hybrid transport H04L12/6418; home network arrangements specially adapted for distribution of digital video signals H04N7/24
• CPC Class Codes: H04L 2012/2841 Wireless
• CPC Class Codes: H04L 45/566 Routing instructions carried by the data packet, e.g. active networks
• CPC Class Codes: H04W 24/00 Supervisory, monitoring or testing arrangements
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks
• CPC Class Codes: H04W 88/04 adapted for relaying to or from another terminal or user
• CPC Class Codes: Y04S 20/30 Smart metering, e.g. specially adapted for remote reading

Abstract

Communication nodes for use with a wireless ad-hoc communication network are disclosed. In an embodiment of the present invention, the communication node comprises a transducer, which generates a signal in response to an external signal. The ad-hoc network communication is supported in part by static communication nodes, which defined an organized infrastructure network in order to achieve the various functions of the transducers. In another embodiment, the communication node for use with a wireless ad-hoc network does not include a transducer. Such communication nodes are preferred for use with a less structured network with virtually no infrastructure and allow for being used with expanding and contracting networks. Mobile communication nodes mostly support the propagation of signals. However, pseudo-static or static communication nodes are also used in wireless communication ad-hoc networks.

Claims

1. A node comprising:

a processor;

a transceiver in communication with the processor for receiving and transmitting signals, the transmitted and received signals being via a wireless transmission medium;

wherein the processor for identifying the received signals as including either a received signal transmitted by another node acting as a central node or not including a received signal transmitted by another node acting as a central node;

wherein

when the received signals include a received signal transmitted by another node acting as a central node the processor;

extracting information from the received signal transmitted by another node acting as a central node and determining whether the another node has capacity to add the node as a member of a group coordinated by the another node acting as a central node;

transmitting a signal to the another node acting as a central node indicating that the node wishes to become a member of the group coordinated by the another node acting as a central node when the extracted information indicates capacity to add the node;

receiving a signal from the another node acting as a central node indicating that the request for the node to become a member of the group coordinated by the another node acting as a central node has been accepted and configuring upon acceptance a first aspect of the node in dependence upon information contained with the acceptance signal; and

when the received signals do not include a received signal transmitted by another node acting as a central node the processor for at least one of;

determining to become at least one of a further central node and an unassigned node;

generating a signal for transmission from the transceiver indicating that the node is acting a central node when the determination to become a central node; and

configuring a second aspect of the node upon the determination.

2. A node according to claim 1 wherein,

the first aspect of the node is at least one of a duty cycle of the node between a first state and a second state, a predetermined time relating to the transmission of signals from the node, and a predetermined time interval relating to the transmission of signals from the node.

3. A node according to claim 2 wherein,

the first state relates to at least one of a sleep mode and a monitoring mode and the second state relates to at least one of a receiving mode, a transmitting mode, and an action mode.

4. A node according to claim 1 wherein,

the second aspect of the node is at least one of a predetermined time relating to the transmission of signals from the node, a predetermined time interval relating to the transmission of signals from the node, and a configuration for signals transmitted from the node.

5. A node according to claim 1 wherein,

the first aspect of the node is established in dependence upon at least one of the capacity of the another node acting as a central node and the number of nodes already established as part of the group coordinated by the another node acting as a central node.

6. A node according to claim 1 wherein,

the processor always transmits a signal at least one indicating the node as being a central node and indicative of a contact signal.

7. A node according to claim 1 wherein,

when the received signals include a received signal transmitted by another node acting as a central node the processor returns a signal indicating at least one a status of the node and the functionality of the node.

8. A node according to claim 1 further comprising;

the processor when the received signals include a received signal transmitted by another node acting as the central node and the node is accepted as a member of the group the processor monitoring for periodic contact requests from the another node acting as the central node and at least one responding to the contact requests and determining an absence of the periodic contact request and establishing at least one of whether a further node acting as a central node will allow the node to form part of another group, whether to configure the node as a central node, and configure the node as an unassigned node; and

the processor when the determination is that node should be an unassigned mode periodically monitors for the presence of a received signal indicative of another node within transmission range acting as a central node and determines whether or not to execute the first protocol.

9. A method comprising:

providing a processor;

providing a transceiver in communication with the processor for receiving and transmitting signals, the transmitted and received signals being via a wireless transmission medium;

determining with the processor whether the received signals include either a received signal transmitted by another node acting as a central node or do not include a received signal transmitted by another node acting as a central node;

wherein

performing a first set of actions when the received signals include a received signal transmitted by another node acting as a central node the processor, the first actions comprising;

extracting information from the received signal transmitted by another node acting as a central node and determining whether the another node has capacity to add the node as a member of a group coordinated by the another node acting as a central node;

transmitting a signal to the another node acting as a central node indicating that the node wishes to become a member of the group coordinated by the another node acting as a central node when the extracted information indicates capacity to add the node; and

receiving a signal from the another node acting as a central node indicating that the request for the node to become a member of the group coordinated by the another node acting as a central node has been accepted and configuring upon acceptance a first aspect of the node in dependence upon information contained with the acceptance signal;

performing a second set of actions when the received signals do not include a received signal transmitted by another node acting as a central node the processor for at least one of, the second set of actions comprising;

determining to become at least one of a further central node and an unassigned node;

generating a signal for transmission from the transceiver indicating that the node is acting a central node when the determination is made to become a central node;

configuring a second aspect of the node upon the determination.

10. A method according to claim 9 wherein,

configuring the first aspect of the node is at least one of configuring a duty cycle of the node between the node being in a first state and a second state, establishing a predetermined time relating to the transmission of signals from the node, and establishing a predetermined time interval relating to the transmission of signals from the node.

11. A method according to claim 10 wherein,

configuring the first state relates to at least one of a sleep mode and a monitoring mode and configuring the second state relates to at least one of a receiving mode, a transmitting mode, and an action mode.

12. A method according to claim 9 wherein,

configuring the second aspect of the node is at least one of a predetermined time relating to the transmission of signals from the node, a predetermined time interval relating to the transmission of signals from the node, and a configuration for signals transmitted from the node.

13. A method according to claim 9 wherein,

configuring the first aspect of the node comprises establishing the first aspect in dependence upon at least one of the capacity of the another node acting as a central node and the number of nodes already established as part of the group coordinated by the another node acting as a central node.

14. A method according to claim 9 wherein,

the processor always transmits a signal at least one indicating the node as being a central node and indicative of a contact signal.

15. A method according to claim 9 wherein,

when the received signals include a received signal transmitted by another node acting as a central node the processor returns a signal indicating at least one a status of the node and the functionality of the node.

16. A method according to claim 9 further comprising;

the processor when the determination is that the received signals include a received signal transmitted by another node acting as the central node and the node is accepted as a member of the group the processor monitors for periodic contact requests from the another node acting as the central node and the processor determines to at least one of respond to the contact requests and determine in the absence of the period contact request to at least one of determine whether a further node acting as a central node will allow the node to form part of another group, configure the node as a central node, and configure the node as an unassigned node; and

the processor when the determination is that the node should be an unassigned mode periodically monitors for the presence of a received signal indicative of another node within transmission range acting as a central node and determines whether or not to execute the first protocol.

17. A network comprising:

a plurality of communication nodes including at least a first communication node in wireless transmission range with a predetermined subset of the plurality of communication nodes, each communication node comprising;

a processor;

a transceiver in communication with the processor for receiving and transmitting signals, the transmitted and received signals being via a wireless transmission medium;

wherein the processor within the first communication nodes identifies received signals from the predetermined subset of the plurality of communication nodes as either including a signal transmitted by a communication node acting as a central node or not including a signal transmitted by a communication node acting as a central node and establishes the first communication node as operating in one of a first protocol and a second protocol and upon a failure of the first communication node in respect of the first protocol defaults the first communication node to the second protocol.

18. The method according to claim 17 wherein;

the first protocol comprises;

extracting information from the received signal transmitted by another node acting as a central node and determining whether the another node has capacity to add the node as a member of a group coordinated by the another node acting as a central node;

transmitting a signal to the another node acting as a central node indicating that the node wishes to become a member of the group coordinated by the another node acting as a central node when the extracted information indicates capacity to add the node;

receiving a signal from the another node acting as a central node indicating that the request for the node to become a member of the group coordinated by the another node acting as a central node has been accepted and configuring upon acceptance a first aspect of the node in dependence upon information contained with the acceptance signal; and

executing the second protocol upon receiving at least one of a refusal to become a member of the group or no response from the another node acting as a central node.

19. A method according to claim 17 wherein;

the second protocol comprises;

determining to become at least one of a further central node and an unassigned node;

generating a signal for transmission from the transceiver indicating that the node is acting a central node when the determination is made to become a central node; and

configuring a second aspect of the node upon the determination.

20. A method according to claim 17 further comprises;

the processor when the determination is that the received signals include a received signal transmitted by another node acting as the central node and the node is accepted as a member of the group the processor monitors for periodic contact requests from the another node acting as the central node and the processor determines to at least one of respond to the contact requests and determine in the absence of the period contact request to at least one of determine whether a further node acting as a central node will allow the node to form part of another group, configure the node as a central node, and configure the node as an unassigned node; and

the processor when the determination is that the node should be an unassigned mode periodically monitors for the presence of a received signal indicative of another node within transmission range acting as a central node and determines whether or not to execute the first protocol.