Monitoring intersection delays in a transportation network
First Claim
1. A method for use in monitoring traffic on a traffic network, said traffic network including a plurality of geographically distributed sensors, the method comprising:
- monitoring wireless communications associated with sources on said traffic network, said wireless communications comprising a stream of data packets wherein each packet of the stream of data packets includes identification information for identifying a source of each respective packet;
operating a first sensor and second sensor of said geographically distributed sensors to provide, to a processor system, first and second sensor information, respectively, associated with a first source based on said monitored wireless communications, each of said first and second sensor information including a series of data packets including one or more non-maximum packets having a signal strength less than that of at least one other packet of said series of packets;
receiving said first sensor information and said second sensor information at said processor system; and
processing at said processor system said first sensor information and said second sensor information so as to identify at least a first series of data packets from said first sensor and a second series of data packets from said second sensor, said first series of data packets from said first sensor and said second series of data packets from said second sensor associated with the first source, to obtain a first value for said first sensor and second value for said second sensor, at least one of said first and second values being obtained using at least one non-maximum packet, and to generate first traffic information based at least in part on comparison of said first and second values.
2 Assignments
0 Petitions
Accused Products
Abstract
A traffic monitoring system (400) includes a network of geographically distributed sensors (401-403). The sensors (401-403) provide raw or preprocessed data to a processing system (405) based on received long range wireless signals (e.g., 2.4 GHz, 5.8 GHz, or 5.9 GHz spectrum). The processing system (405) can then implement any of various algorithms to calculate traffic parameters taking into account the range of communication between the source and the sensor. The inputs to these algorithms include a first contacts, last contacts, maximum range, minimum range, median of contacts, average of contacts, maximum strength, and combinations thereof.
15 Citations
36 Claims
-
1. A method for use in monitoring traffic on a traffic network, said traffic network including a plurality of geographically distributed sensors, the method comprising:
-
monitoring wireless communications associated with sources on said traffic network, said wireless communications comprising a stream of data packets wherein each packet of the stream of data packets includes identification information for identifying a source of each respective packet; operating a first sensor and second sensor of said geographically distributed sensors to provide, to a processor system, first and second sensor information, respectively, associated with a first source based on said monitored wireless communications, each of said first and second sensor information including a series of data packets including one or more non-maximum packets having a signal strength less than that of at least one other packet of said series of packets; receiving said first sensor information and said second sensor information at said processor system; and processing at said processor system said first sensor information and said second sensor information so as to identify at least a first series of data packets from said first sensor and a second series of data packets from said second sensor, said first series of data packets from said first sensor and said second series of data packets from said second sensor associated with the first source, to obtain a first value for said first sensor and second value for said second sensor, at least one of said first and second values being obtained using at least one non-maximum packet, and to generate first traffic information based at least in part on comparison of said first and second values. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25)
-
-
26. An apparatus for use in a system of monitoring vehicle traffic on a roadway network comprising:
-
a plurality of geographically distributed sensors within one or more roadway networks, wherein each sensor of the plurality of geographically distributed sensors is configured to detect the presence of wireless signals within the roadway network, each sensor comprising; a local processing engine, executable by a processor of each sensor, that is configured to monitor wireless communications associated with vehicles on said roadway network; and a client, executable by said processor of each sensor; and a central processing server communicatively interconnected to said plurality of geographically distributed sensors, the central processing server comprising; a sensor information engine, executable by a processor of said central processing server, that is configured to identify at least first and second sensor information from first and second sensors of said plurality of geographically distributed sensors, each of said first and second sensor information being associated with a first source and including a series of data packets including one or more non-maximum packets having a signal strength less than that of at least one other packet of said series of packets; a traffic analysis engine, executable by said processor of said central processing server, that is configured to calculate a travel time of said first source between said first sensor and said second sensor by obtaining a first value for said first sensor and a second value for said second sensor, at least one of said first and second values being obtained using at least one non-maximum packet; and a first database, accessible by said processor of said central processing server, that is configured to store said first and second sensor information associated with said first source; wherein said client is operable to transmit said monitored wireless communications to said central processing server. - View Dependent Claims (27, 28, 29, 30, 31, 32, 33, 34, 35, 36)
-
Specification