System and method for silent retry

• US 20060019687A1
• Filed: 07/20/2004
• Published: 01/26/2006
• Est. Priority Date: 07/20/2004
• Status: Active Grant

• Current Assignee: Google Technology Holdings LLC (Alphabet Inc.)
• Original Assignee: Motorola, Inc. (Motorola Solutions, Inc.)
• Inventors: Garg, Sanjeev, Castillo, Alfredo R.
• Granted Patent: US 8,971,937 B2
• Time in Patent Office: Days
• US Class Current: 455/502
• CPC Class Codes: H04B 7/2662 Arrangements for Wireless System Synchronisation
• CPC Class Codes: H04W 56/00 Synchronisation arrangements
• CPC Class Codes: H04W 56/001 Synchronization between nodes
• CPC Class Codes: H04W 72/21 in the uplink direction of a wireless link, i.e. towards the network
• CPC Class Codes: H04W 88/08 Access point devices

Abstract

A system and method for synchronizing the operation of a wireless mobile station (102) and a base station (104) includes receiving a message at the base station (104) indicating a state of operation of the wireless mobile station (102). A determination is made as to whether the base station (104) and the mobile station (102) are in synchronization based upon comparing the state of operation of the mobile station (102) and a state of operation of the base station (104).

Claims

1. A method for synchronizing the operation of a wireless mobile station and a base station comprising:

receiving a message at the base station indicating a state of operation of the wireless mobile station; and

detecting whether the base station and the mobile station are in synchronization based upon comparing the state of operation of the mobile station and a state of operation of the base station.

2. The method of claim 1 further comprising taking a corrective action when the mobile station and the base station are determined not to be in synchronization.

3. The method of claim 2 wherein taking a corrective action adjusts the state of operation of the base station such that the state of operation of the base station and the state of operation of the mobile station are substantially the same.

4. The method of claim 2 wherein taking a corrective action comprises preventing assignment messages from being sent to the mobile station until the occurrence of a predetermined event.

5. The method of claim 4 further comprising automatically initiating a silent retry at the mobile station upon a detection of a call setup failure.

6. A method for initiating a silent retry message comprising:

receiving a control message from a mobile station;

determining from contents of the control message whether the mobile station is in a predetermined state and has acquired a channel; and

responsive to the determination, preventing assignment messages from being sent to the mobile station.

7. The method of claim 6 further comprising initiating a silent retry at the mobile station upon a detection of an absence of the assignment messages.

8. The method of claim 6 wherein receiving the control message comprises receiving a Mobile Station order reject message.

9. The method of claim 6 wherein determining from the contents comprises determining from the contents whether the mobile station is in a state expecting direction to a traffic channel.

10. The method of claim 6 wherein preventing assignment messages from being sent comprises preventing extended channel assignment messages (ECAMs) from being sent.

11. The method of claim 6 further comprising receiving the silent retry from the mobile station.

12. The method of claim 11 further comprising establishing a communication session between the base station and the mobile station after receiving the silent retry at the base station.

13. A device for initiating a silent retry comprising:

a receiver for receiving a control message from a mobile station;

a processor communicatively coupled to the receiver, wherein the processor;

determines from contents of the control message whether the mobile station is operating in a predetermined state and has acquired a communication channel; and

selectively stops forming assignment messages based upon the determination.

14. The device of claim 13 wherein the control message comprises a Mobile Station order reject message.

15. The device of claim 13 wherein the controller comprises means for determining whether the mobile station is in channel traffic state and has acquired a traffic channel (TCH).

16. The device of claim 13 wherein the controller comprises means for preventing extended channel assignment messages (ECAMs) from being sent.

17. A telecommunication system comprising:

a radio access network (RAN);

at least one mobile station coupled to the RAN; and

wherein the mobile station transmits a control message to the RAN and the RAN selectively stops forming assignment messages based upon contents of the control message.

18. The telecommunication system of claim 17 wherein the control message comprises a Mobile Station reject message.

19. The telecommunication system of claim 17 wherein the RAN comprises means for determining whether the mobile station is in channel traffic state and has acquired a traffic channel (TCH).

20. The telecommunication system of claim 17 wherein the RAN comprises means for preventing extended channel assignment messages (ECAMs) from being sent.

21. A method of detecting the non-synchronization of a base station and a mobile station comprising:

receiving an access channel message, the message indicating an initiation of a silent retry message; and

receiving an order message, the order message indicating the cause of the rejection.

22. The method of claim 21 wherein receiving an order message comprises receiving a Mobile Station reject message indicating unspecified reason.

23. The method of claim 21 wherein receiving an access channel message comprises receiving an origination or page response message.