Communication System

• US 20080225829A1
• Filed: 08/05/2005
• Published: 09/18/2008
• Est. Priority Date: 08/05/2005
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Sachs, Joachim, Prytz, Mikael, Lundsjo, Johan, Magnusson, Per Olof Magnus
• Granted Patent: US 8,891,510 B2
• Time in Patent Office: Days
• US Class Current: 370/351
• CPC Class Codes: H04W 48/18 Selecting a network or a communication service
• CPC Class Codes: H04W 88/06 adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

Abstract

A communication system is provided which is arranged for accessing a network by a group of first access paths and a group of second access paths. The first and second access paths have a different access technology. An access path monitor is provided for obtaining status information related to the access paths in accordance with the monitoring procedure. An access controller is provided for selecting an access path for a communication session in accordance with a selection procedure and in dependence on the status information. A modifier is provided for modifying one or both of the monitoring procedure and the selection procedure in accordance with a modification procedure and in dependence on decision information.

Claims

1. A communication system arranged for accessing a network via a group of first access paths of a first access technology and a group of second access paths of a second access technology different from said first access technology, the communication system comprising:

an access path monitor for obtaining status information related to a status of one or more of said first access paths and one or more of said second access paths in accordance with a monitoring procedure,

an access controller for selecting an access path for a communication session from among said first and second access paths in accordance with a selection procedure and in dependence on said status information, and

a modifier for modifying one or both of said monitoring procedure and said selection procedure in accordance with a modification procedure and in dependence on decision information, wherein said decision information comprises an indication of resources available to said communication system.

2. The communication system according to claim 1, wherein said access controller is arranged for switching said communication session between said first and second access paths while said communication session is active.

3. The communication system according to claim 1 wherein modifying said monitoring procedure comprises modifying a frequency with which said status information is obtained.

4. The communication system according to claim 1, wherein modifying said monitoring procedure comprises modifying a frequency with which said status information is forwarded from said access path monitor to said access controller.

5. The communication system according to claim 1, wherein modifying said monitoring procedure comprises modifying the status information being obtained for one or more of said access paths.

6. The communication system according to claim 1, wherein modifying said monitoring procedure comprises modifying the number of access paths for which status information is obtained.

7. The communication system according to claim 1, wherein modifying said selecting procedure comprises modifying the number of access paths from among which an access path for a communication session is selected.

8. The communication system according to claim 1, wherein said decision information is at least partially derived from said status information.

9. The communication system according to claim 1, wherein said decision information comprises numerical values.

10. The communication system according to claim 9, wherein said numerical values comprise values of one or more decision parameters.

11. The communication system according to claim 10, wherein said modification procedure comprises comparing parameter values associated with one of said decision parameters with a respective threshold.

12. The communication system according to claim 9, wherein said numerical values comprise change rate values of one or more decision parameters.

13. The communication system according to claim 12, wherein said modification procedure comprises comparing change rate values associated with one of said decision parameters with a respective threshold.

14. The communication system according to claim 1, wherein said decision information comprises a traffic load indication.

15. The communication system according to claim 1, wherein said decision information comprises a signal quality indication.

16. The communication system according to claim 1, wherein said communication system is mobile and said decision information comprises an indication of a velocity of said communication system.

17. The communication system according to one of claims 1 to 16, wherein said decision information comprises an indication of resources available to said communication system.

18. The communication system according to claim 1, wherein said decision information comprises one or both of estimated benefit values and estimated cost values for a plurality of different settings of said monitoring procedure.

19. The communication system according to claim 1, wherein said decision information comprises one or both of estimated benefit values and estimated cost values for a plurality of different settings of said selection procedure.

20. The communication system according to claim 1, wherein said decision information comprises preference information set by One or both of a user of said communication system and an operator of said network.

21. The communication system according to claim 1, wherein said decision information comprises an indication of the momentary sensitivity of said selecting procedure to a timeliness of said status information.

22. The communication system according to claim 1, wherein said modifier is arranged such that said modification procedure comprises a determination of whether one or more service requirements are fulfilled for said communication session.

23. A modifier for modifying one or both of a monitoring procedure of an access path monitor and a selection procedure of an access controller, arranged for operating in a communication system according to claim 1.

24. A method of controlling access to a network via a group of first access paths of a first access technology and a group of second access paths of a second access technology different from said first access technology, the method comprising

obtaining status information related to a status of one or more of said first access paths and one or more of said second access paths in accordance with a monitoring procedure,

selecting an access path for a communication session from among said first and second access paths in accordance with a selection procedure and in dependence on said status information, and

modifying one or both of said monitoring procedure and said selection procedure in accordance with a modification procedure and in dependence on decision information, wherein said decision information comprises an indication of resources available to said communication system.

24-1. A computer program product within a computer readable medium of a communication system for controlling access to a network via a group of first access paths of a first access technology and a group of second access paths of a second access technology different from said first access technology, the computer program product comprising:

instructions within the computer usable medium for obtaining status information related to a status of one or more of said first access paths and one or more of said second access paths in accordance with a monitoring procedure,

instructions within the computer usable medium for selecting an access path for a communication session from among said first and second access paths in accordance with a selection procedure and in dependence on said status information, and

instructions within the computer usable medium for modifying one or both of said monitoring procedure and said selection procedure in accordance with a modification procedure and in dependence on decision information, wherein said decision instructions within the computer usable medium for information comprises an indication of resources available to said communication system.