Traffic information estimation and reporting system

• US 5,732,383 A
• Filed: 09/14/1995
• Issued: 03/24/1998
• Est. Priority Date: 09/14/1995
• Status: Expired due to Term

• Current Assignee: AT&T Mobility II LLC (AT&T, Inc.)
• Original Assignee: AT&T Corporation (AT&T, Inc.)
• Inventors: Ronen, Yzhak, Leung, Kin K., Goldman, Shelley B., Foladare, Mark Jeffrey, Silverman, David Phillip, Schlanger, Gabriel Gary
• Primary Examiner(s): ZANELLI, MICHAEL J
• Application Number:
  US08/528,292
• Time in Patent Office: 922 Days
• Field of Search: 364/436, 364/437, 364/438, 364/460, 379/58, 379/59, 455/33.1
• US Class Current: 455/456.5
• CPC Class Codes: G08G 1/0104 Measuring and analyzing of parameters relative to traffic conditions
• CPC Class Codes: G08G 1/096716 where the received information does not generate an automatic action on the vehicle control
• CPC Class Codes: G08G 1/096741 where the source of the transmitted information selects which information to transmit to each vehicle
• CPC Class Codes: G08G 1/096758 where no selection takes place on the transmitted or the received information
• CPC Class Codes: G08G 1/096775 where the origin of the information is a central station

Abstract

An estimation of traffic conditions on roads located in the radio coverage areas of a wireless communications network is provided based on an analysis of real-time and past wireless traffic data carried on the wireless communications network. Data analyzed may include, for example, actual (current) and expected (past average) number of a) active-busy wireless end-user devices in one or more cells at a particular period of time, b) active-idle wireless end-user devices registered in a location area of the wireless communications network, c) amount of time spent by mobile end-user devices in one or more cells at a particular period of time.

Claims

1. A method of determining road traffic conditions in thoroughfares located in radio coverage areas served by a wireless communications network including a plurality of base stations, each serving a cell in the radio coverage areas and a wireless switch coupled to the plurality of base stations, said method comprising the steps of:

receiving from each of a plurality of cells, via said wireless switch coupled to a base station associated with the cell, real-time registration and cell activity data from active mobile end-user devices currently located in each of said plurality of cells served by the wireless communications network; and

estimating road traffic conditions in at least one thoroughfare located in said at least one of said radio coverage areas based on a comparison of said real-time registration and cells'"'"' activity data to past analog equivalent information previously collected by said wireless communications network for said at least one of said radio coverage areas.

2. The method of claim 1 wherein information associated with said estimated road traffic conditions is delivered to at least one user of one of said mobile end-user devices.

3. The method of claim 2 wherein said information associated with said estimated road traffic conditions is delivered in audible format to said at least one user of one of said mobile end-user devices.

4. The method of claim 2 wherein said information associated with said estimated road traffic conditions is delivered in graphical format to said at least one user of one of said mobile end-user devices.

5. The method of claim 2 wherein said information associated with said estimated road traffic conditions is delivered to said at least one user of one of said mobile end-user devices when said one of said mobile end-user devices is in an active-busy state.

6. The method of claim 1 wherein said estimating step further includes the steps of:

tallying at least a portion of said real-time registration and cells'"'"' activity data to determine a total number of mobile end-user devices that are active in at least one of said radio coverage areas within a given time period; and

determining whether said total number of active mobile end-user devices in said at least one of said radio coverage areas exceeds a first threshold indicated by said past analog information for said at least one cell.

7. The method of claim 6 further comprising the step of:

establishing that a bottleneck is present in at least one section of at least one of said thoroughfares located in said at least one of said radio coverage areas when said total number of active mobile end-user devices in said at least one of said radio coverage areas exceeds said first threshold by a given percentage.

8. The method of claim 1 wherein said cells'"'"' activity data include amount of time spent by at least one active mobile end-user device in at least one cell.

9. The method of claim 8 further comprising the steps of:

counting a total number of said active mobile end-user devices that individually spend in said at least one cell an amount of time that exceeds a second threshold indicated by said past analog equivalent information for said at least one cell; and

ascertaining that a bottleneck is present in at least one section of at least one thoroughfare associated with said at least one cell if said total number is higher than a given percentage of a count of all mobile end-user devices active in said at least one cell.

10. The method of claim 7 or 9 further comprising the steps of:

identifying a direction of said at least one thoroughfare in which said bottleneck is present, said identification being based on a relative amount of current wireless traffic in at least two cells that are adjacent to said at least one cell.

11. A system for determining road traffic conditions in a geographic area corresponding to a plurality of radio coverage areas served by a wireless communications system including a plurality of base stations and a wireless switch coupled to the base stations, the system comprising:

a wireless traffic monitor, coupled to said wireless switch and which tracks a current flow of active mobile end-user devices entering and exiting at least one of a plurality of radio coverage areas which are served by the wireless communications system, and in which a plurality of roads are located;

a processor which compares said current flow for said at least one radio coverage area to a past average flow previously collected by said wireless communications system for said at least one radio coverage area under substantially similar time conditions; and

means responsive to said comparison for assessing road traffic conditions in said at least one radio coverage area.

12. The system of claim 11 further comprising:

a voice information system for delivering to at least one user of said active mobile end-user devices a message indicative of a bottleneck condition in at least one section of at least one of said roads when said current flow for said at least one radio coverage area exceeds said past average flow for said at least one radio coverage area by a given percentage.

13. The system of claim 12 wherein said at least one section of said at least one of said roads is associated with at least one coverage area identified by a table contained in a storage area of said processor.

14. A system for estimating road conditions in a geographical area corresponding to a plurality of radio coverage areas served by a wireless communications network including a plurality of base stations and a wireless switch coupled to the base stations, said system comprising:

a wireless traffic monitor, coupled to said wireless switch, that keeps track of at least one of the following wireless activity data;

a) currently active mobile end-user devices in at least one of a plurality of radio coverage areas of a wireless communications network, and b) amount of time spent by each currently active mobile end user-device in at least one of said coverage areas;

a processor that performs at least one of a plurality of functions which include a) comparing an expected average number of active mobile end-user devices in at least one of said radio coverage areas to a total tracked number of said currently active mobile end-user devices in said at least one of said radio coverage areas, and b) determining a total count of active mobile end-user devices in at least one of said radio coverage areas that spend a higher than expected amount of time in said at least one of said radio coverage areas; and

means responsive to at least one of said functions for estimating traffic road conditions in thoroughfares located in said least one of said radio coverage areas.

15. The system of claim 14 further comprising:

a voice information system that delivers information associated with said estimated traffic road conditions to selected users of said active mobile end-user devices.

16. The invention of claim 14 further comprising:

a storage area that contains a table that correlates said radio coverage areas to particular sections of said thoroughfares so that traffic road conditions can be estimated for said particular sections of said thoroughfares.

17. The invention of claim 14 wherein said expected average number of active mobile end-user devices in each one of said radio coverage areas is based on past analog equivalent data previously collected by said wireless communications network.

18. The invention of claim 14 wherein said expected amount of time spent by a mobile end-user device in one of said radio coverage areas is based on past analog equivalent data previously collected by said wireless communications network.

19. A method of estimating traffic conditions in thoroughfares located in the radio coverage areas of a wireless communications network that includes a plurality of base stations and a wireless switch coupled to said base stations, said method comprising the steps of:

receiving, via at least one of the base stations and the wireless switch, communications signals from a plurality of wireless devices that are active in at least one of a plurality of radio coverage areas; and

determining that a bottleneck traffic condition is present in at least one section of said thoroughfares when a count of said active devices located in said at least one of said radio coverage areas associated with said at least one section of said thoroughfares exceeds a selected threshold.

20. The method of claim 19 wherein information associated with said bottleneck traffic condition is delivered to at least one user of one of said active wireless devices.