Method and apparatus for predicting a link interruption in an ad hoc communications network using a manet type routing protocol
First Claim
1. A method of predicting a link interruption between routers (RR, R) in an ad hoc communications network having a MANET type routing protocol, the method being characterized in that in the presence of a “
- multicast”
type routing protocol and of a “
parent/child”
type hierarchical tree structure set up between a “
source”
router (RS) and at least one “
receiver”
router (RR) via “
intermediate”
routers (RA), each router in said tree structure measures the intensity of signals coming from its “
parent”
router and compares said measured intensity with a selected threshold, such that in the event of a “
child”
router detecting that the measured intensity level is less than said threshold over the link with its neighboring parent router, said child router transmits a message in point-to-point mode to a neighboring router in said network other than its parent router, and in that said message includes a request to join said tree structure and specifying said source router (RS).
1 Assignment
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Accused Products
Abstract
An ad hoc communications network with MANET type routing protocol is arranged to implement a method dedicated to predicting the interruption of a link between routers (R1, R2) of an ad hoc communications network with a MANET type routing protocol. The method consists, in each router (R1, R2) of the network, in measuring the intensity levels of signals coming from at least of the neighboring routers thereof, and in comparing each measured intensity with a selected threshold. Thus, when a router (R1) detects that the measured intensities of signals coming from a link with a neighboring router (R2) is below the threshold, it considers that the link has been interrupted and it sends a message to at least one of its neighboring routers for the purpose of mitigating the consequences of this link being interrupted.
34 Citations
11 Claims
-
1. A method of predicting a link interruption between routers (RR, R) in an ad hoc communications network having a MANET type routing protocol, the method being characterized in that in the presence of a “
- multicast”
type routing protocol and of a “
parent/child”
type hierarchical tree structure set up between a “
source”
router (RS) and at least one “
receiver”
router (RR) via “
intermediate”
routers (RA), each router in said tree structure measures the intensity of signals coming from its “
parent”
router and compares said measured intensity with a selected threshold, such that in the event of a “
child”
router detecting that the measured intensity level is less than said threshold over the link with its neighboring parent router, said child router transmits a message in point-to-point mode to a neighboring router in said network other than its parent router, and in that said message includes a request to join said tree structure and specifying said source router (RS). - View Dependent Claims (2, 3, 4, 5, 6)
- multicast”
-
7. Apparatus (D) for predicting the interruption of a link between routers, for use in a router (RR, R) of an ad hoc communications network using a MANET type routing protocol, the apparatus being characterized in that it comprises processor means (MT) arranged to act in the router in which it is equipped to compare a measured intensity of signals coming from at least one of the neighboring routers with a selected threshold so that in the event of detecting a measured intensity below said threshold on a link with a neighboring router, it considers that said link is interrupted and orders a message to be sent to at least one of said neighboring routers in order to mitigate the consequences of said link being interrupted;
- and in that in the presence of a multicast type routing protocol and a hierarchical tree structure of the “
parent/child”
type, set up between a “
source”
router (RS) and at least one “
receiver”
router (RR) of said network, and in which the router (R2A) having said apparatus fitted thereto forms a part, said processor means (MT) are arranged to compare said selected threshold with the measured intensities of signals coming from a router (R3A) of said tree structure that constitutes a “
parent”
router for said router (R2A), so that in the event of detecting a measured intensity less than said threshold over a link with said parent router (R3A), it orders said message to be transmitted in point-to-point mode to a neighboring router (R4A) of said network other than said parent router (R3A), and in that said message comprises a request to join said tree structure, and specifies said source router (RS). - View Dependent Claims (8, 9, 10, 11)
- and in that in the presence of a multicast type routing protocol and a hierarchical tree structure of the “
Specification