Abstract
Techniques for sending information without interruption during a change in ciphering configuration are described. A user equipment (UE) communicates with a wireless communication network for a call. The UE sends first information to the wireless network using a first ciphering configuration. For a change in ciphering configuration the UE selects an activation time for a second ciphering configuration and sends a security message with the activation time. This activation time is the time at which the UE applies the second ciphering configuration to transmission sent to the wireless network. The UE thereafter sends second information (e.g. a measurement report message) using the first ciphering configuration after sending the security message and before the activation time. The UE sends third information using the second ciphering configuration after the activation time.
Techniques for sending information without interruption during a change in ciphering configuration are described. A user equipment (UE) communicates with a wireless communication network for a call. The UE sends first information to the wireless network using a first ciphering configuration. For a change in ciphering configuration the UE selects an activation time for a second ciphering configuration and sends a security message with the activation time. This activation time is the time at which the UE applies the second ciphering configuration to transmission sent to the wireless network. The UE thereafter sends second information (e.g. a measurement report message) using the first ciphering configuration after sending the security message and before the activation time. The UE sends third information using the second ciphering configuration after the activation time.
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| 3G | 27/01/2010 | ISLD-201004-004 | QUALCOMM INC | Yes | Family Member | ||||
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Specification Information
Specification Information
Technologies
Family Information
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Technologies
Broadcast/Multicast
Product
Use Cases
Wireless communication
Services
Claim
1. An apparatus comprising: at least one processor configured to send first information using a first ciphering configuration, to select an activation time for a second ciphering configuration, to send a security message with the activation time, to send second information using the first ciphering configuration after sending the security message and before the activation time, and to send third information using the second ciphering configuration after the activation time; and a memory coupled to the at least one processor and configured to store the first and second ciphering configurations.
2. The apparatus of claim 1, wherein the at least one processor is configured to select the activation time to be a particular amount of time after the end of the security message.
3. The apparatus of claim 1, wherein the at least one processor is configured to select the activation time based on pending messages to send using the first ciphering configuration before sending the security message.
4. The apparatus of claim 1, wherein the at least one processor is configured to select the activation time based on at least one message to send for the second information using the first ciphering configuration.
5. The apparatus of claim 4, wherein the at least one message comprises a measurement report message.
6. The apparatus of claim 4, wherein the at least one message comprises an active set update message.
7. The apparatus of claim 1, wherein the at least one processor is configured to send the first, second, and third information and the security message in protocol data units (PDUs) with sequential sequence numbers, to select a sequence number of a PDU that is a particular number of PDUs after a last PDU for the security message as an activation sequence number, and to use the activation sequence number as the activation time.
8. The apparatus of claim 7, wherein the at least one processor is configured to determine the activation sequence number based on a sequence number of a next PDU to send, the number of PDUs to send before the security message, the number of PDUs to send for the security message, and the number of PDUs to send using the first ciphering configuration after sending the security message.
9. The apparatus of claim 7, wherein the at least one processor is configured to suspend transmission of PDUs with sequence numbers greater than or equal to the activation sequence number until an acknowledgement is received for the security message
10. The apparatus of claim 1, wherein the at least one processor is configured to receive an acknowledgement for the security message before the activation time
11. The apparatus of claim 1, wherein the at least one processor is configured to set the activation time to a pending activation time if a pending ciphering configuration exists
12. The apparatus of claim 1, wherein the at least one processor is configured to set the activation time to a pending activation time if a pending ciphering configuration exists and the pending activation time allows for sending pending messages and the security message using the first ciphering configuration
13. The apparatus of claim 1, wherein the security message is a SECURITY MODE COMPLETE message sent on uplink
14. The apparatus of claim 1, wherein the security message is a SECURITY MODE COMMAND message sent on downlink
15. A method comprising : sending first information using a first ciphering configuration; selecting an activation time for a second ciphering configuration; sending a security message with the activation time; sending second information using the first ciphering configuration after sending the security message and before the activation time; and sending third information using the second ciphering configuration after the activation time
16. The method of claim 15, wherein the selecting the activation time comprises selecting the activation time based on at least one message to send for the second information using the first ciphering configuration
17. The method of claim 15, wherein the first, second, and third information and the security message are sent in protocol data units (PDUs) with sequential sequence numbers, and wherein the selecting the activation time comprises determining an activation sequence number based on a sequence number of a next PDU to send, the number of PDUs to send before the security message, the number of PDUs to send for the security message, and the number of PDUs to send using the first ciphering configuration after sending the security message, and using the activation sequence number as the activation time
18. The method of claim 17, further comprising: suspending sending PDUs with sequence numbers greater than or equal to the activation sequence number until an acknowledgement is received for the security message
19. An apparatus comprising : means for sending first information using a first ciphering configuration; means for selecting an activation time for a second ciphering configuration; means for sending a security message with the activation time; means for sending second information using the first ciphering configuration after sending the security message and before the activation time; and means for sending third information using the second ciphering configuration after the activation time.
20. The apparatus of claim 19, wherein the first, second, and third information and the security message are sent in protocol data units (PDUs) with sequential sequence numbers, and wherein the means for selecting the activation time comprises means for determining an activation sequence number based on a sequence number of a next PDU to send, the number of PDUs to send before the security message, the number of PDUs to send for the security message, and the number of PDUs to send using the first ciphering configuration after sending the security message, and means for using the activation sequence number as the activation time.
21. A processor readable media for storing instructions operable to: send first information using a first ciphering configuration; select an activation time for a second ciphering configuration; send a security message with the activation time; send second information using the first ciphering configuration after sending the security message and before the activation time; and send third information using the second ciphering configuration after the activation time.
22. The processor readable media of claim 21, and further for storing instructions operable to: send the first, second, and third information and the security message in protocol data units (PDUs) with sequential sequence numbers; determine an activation sequence number based on a sequence number of a next PDU to send, the number of PDUs to send before the security message, the number of PDUs to send for the security message, and the number of PDUs to send using the first ciphering configuration after sending the security message; and use the activation sequence number as the activation time.
23. An apparatus comprising: at least one processor configured to receive and decipher first information based on a first ciphering configuration, to receive a security message with an activation time for a second ciphering configuration, to receive second information after the security message and before the activation time, to decipher the second information based on the first ciphering configuration, to receive third information after the activation time, and to decipher the third information based on the second ciphering configuration; and a memory coupled to the at least one processor and configured to store the first and second ciphering configurations.
24. The apparatus of claim 23, wherein the at least one processor is configured to send an acknowledgement for the security message before the activation time.
25. The apparatus of claim 23, wherein the second information comprises a measurement report message.
26. A method comprising: receiving first information; deciphering the first information based on a first ciphering configuration; receiving a security message with an activation time for a second ciphering configuration; receiving second information after the security message and before the activation time; deciphering the second information based on the first ciphering configuration; receiving third information after the activation time; and deciphering the third information based on the second ciphering configuration.
27. The method of claim 26, further comprising: sending an acknowledgement for the security message before the activation time.
28. An apparatus comprising: means for receiving first information; means for deciphering the first information based on a first ciphering configuration; means for receiving a security message with an activation time for a second ciphering configuration; means for receiving second information after the security message and before the activation time; means for deciphering the second information based on the first ciphering configuration; means for receiving third information after the activation time; and means for deciphering the third information based on the second ciphering configuration.
29. The apparatus of claim 28, further comprising: means for sending an acknowledgement for the security message before the activation time.']
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