1. A method for estimating an object motion characteristic from a radar signal, comprising the steps of
receiving radar data of an object from a multiple beam radar system;
associating radar data with estimated height andor cross-range information of object parts causing the corresponding radar data;
fitting an object model with radar data being associated with a selected estimated height andor cross-range information interval, and
determining an object motion characteristic from the fitted object model.
2. The method according to claim 1, wherein the associating step comprises estimating height andor cross-sectional information of object parts, based on trilateration andor received radar data power.
3. The method according to claim 1, wherein the fitting step comprises constructing speedrange data from the received radar data.
4. The method according to claim 1, wherein the object model comprises an ellipsoid as a function of speedrange parameters.
5. A method according to claim 1, wherein the object comprises a human body.
6. The method according to claim 5, wherein the object model comprises a torso parameter, a leg parameter andor an arm parameter.
7. The method according to claim 1 further comprising the step of representing radar data as a function of speed, range and at least one of estimated height and cross-sectional information.
8. The method according to claim 1, further comprising the step of representing radar data in a single image.
9. The method according to claim 1, further comprising the step of classifying the estimated object motion characteristic in one class of a pre-determined number of classes, based on characteristic values.
10. The method according to claim 9, wherein the classifying step is performed based on estimated frequency and radius parameter values.
11. The method according to claim 1, wherein the receiving step comprises receiving radar data from at least three radar stations.
12. The method according to claim 1, wherein the radar system comprises a multiple number of separate radar stations.
13. The method according to claim 1, wherein the multiple beams of the radar system are mutually coherent.
14. A computer system comprising a processor that is arranged for performing the steps comprising:
receiving radar data of an object from a multiple beam radar system;
associating radar data with estimated height andor cross-range information of object parts causing the corresponding radar data;
fitting an object model with radar data being associated with a selected estimated height andor cross-range information interval, and
determining an object motion characteristic from the fitted object model.
15. An article of manufacture comprising a non-transitory computer usable medium having encoded thereon a set of instructions executable by a computer system to perform one or more operations, the set of instructions comprising:
instructions for receiving radar data of an object from a multiple beam radar system;
instructions for associating radar data with estimated height andor cross-range information of object parts causing the corresponding radar data;
instructions for fitting an object model with radar data being associated with a selected estimated height andor cross-range information interval, and
instructions for determining an object motion characteristic from the fitted object model.
The claims below are in addition to those above.
All refrences to claim(s) which appear below refer to the numbering after this setence.
1. A restoration method for restoring a flow of packets in a packet transfer network composed of a plurality of routers, comprising the steps of:
a) setting a working route and a reserved route in the packet transfer network, wherein the reserved route branches from the working route at a start-point router; at each of routers other than the start-point router on the working route,
b) determining whether a failure occurs in a link to a next-hop router on the working route;
c) determining whether an incoming packet is to be protected;
d) when a packet to be protected is received in case of occurrence of the failure sending the packet to be protected back to the start-point router; and at the start-point router,
e) when receiving back the packet to be protected, forwarding it to the reserved route.
2. The restoration method according to claim 1, wherein, when the start-point router receives a packet to be protected in case of occurrence of the failure, the start-point router forwards it to the reserved route.
3. The restoration method according to claim 1, wherein the working and reserved routers are set by a network management server controlling each of the routers in the packet transfer network.
4. The restoration method according to claim 1, wherein the step (d) comprises the steps of:
d.1) when a packet to be protected is received in case of occurrence of the failure, adding a protection control header to the packet to be protected to produce a return packet; and
d.2) sending the return packet back to the start-point router, and
the step (e) comprises the steps of:
e.1) receiving the return packet back from a next-hop router on the working route;
e.2) removing the protection control header from the return packet to produce an original packet to be protected; and
e.3) forwarding the original packet to the reserved route.
5. A packet transfer network comprising;
a plurality of routers; and
a network management server for designing a packet protection network in which a working route and a reserved route are set by controlling designated routers which are involved in the working and reserved routes, wherein the reserved route branches from the working route at a start-point router,
wherein each of a plurality of designated routers forming the working route, comprises:
a line failure detector for detecting a failure occurring in a link to a next-hop router on the working route;
a table for storing information indicating where a packet to be protected is forwarded to; and
a packet distribution controller for, when a packet to be protected is received in case of occurrence of the failure, forwarding the packet to be protected depending on the information stored in the table,
wherein the designated routers other than the start-point router forwards the packet to be protected back to the start-point router in case of occurrence of the failure, wherein the start-point router forwards the packet to be protected received back from another router to the reserved route.
6. The packet transfer network according to claim 5, wherein the start-point router is an ingress router to the packet protection network.
7. The packet transfer network according to claim 5, wherein the network management server transfers the information of the table to each of the designated routers depending on which one of the start-point router and a transit router the designated router is.
8. A router in a packet protection network in which a working route and a reserved route are set by controlling designated routers which are involved in the working and reserved routes, wherein the reserved route branches from the working route at a start-point router, comprising:
a line failure detector for detecting a failure occurring in a link to a next-hop router on the working route;
a table for storing information indicating where a packet to be protected is forwarded to; and
a packet distribution controller for, when a packet to be protected is received in case of occurrence of the failure, forwarding the packet to be protected depending on the information stored in the table,
wherein the designated routers other than the start-point router forwards the packet to be protected back to the start-point router in case of occurrence of the failure, wherein the start-point router forwards the packet to be protected received back from another router to the reserved route.
9. The router according to claim 8, wherein the start-point router is an ingress router to the packet protection network.
10. The router according to claim 8, wherein the information of the table in each of the designated routers is downloaded from a network management server of the packet protection network depending on which one of the start-point router and a transit router the designated router is.
11. A recording medium storing a computer-readable program for instructing a computer to restore a flow of packets in a packet transfer network composed of a plurality of routers, the computer-readable program comprising the steps of:
at a network management server,
a) setting a working route and a reserved route in the packet transfer network, wherein the reserved route branches from the working route at a start-point router;
at each of routers other than the start-point router on the working route,
b) determining whether a failure occurs in a link to a next-hop router on the working route;
c) determining whether an incoming packet is to be protected;
d) when a packet to be protected is received in case of occurrence of the failure, sending the packet to be protected back to the start-point router; and
at the start-point router,
e) when receiving back the packet to be protected, forwarding it to the reserved route.