REDUCING DATA TRANSFER LATENCY CAUSED BY STATE TRANSITIONS IN MOBILE NETWORKS

• US 20140051415A1
• Filed: 08/16/2012
• Published: 02/20/2014
• Est. Priority Date: 08/16/2012
• Status: Abandoned Application

• Current Assignee: Blackberry Limited
• Original Assignee: Blackberry Limited
• Inventors: Ekici, Ozgur, Farnsworth, Andrew John, Singh, Vaibhav, Vijay, Anup
• Application Number:
  US13/587,613
• Publication Number:
  US 20140051415A1
• Time in Patent Office: Days
• US Class Current: 455/418
• CPC Class Codes: H04W 72/00 Local resource management
• CPC Class Codes: H04W 76/27 Transitions between radio resource control [RRC] states

Abstract

Examples of reducing data transfer latency caused by state transitions in mobile networks are disclosed. A first disclosed example method comprises, while operating in a first state having fewer available radio resources than would be available in a second state, setting a traffic volume indicator if a wireless device determines that a radio link control (RLC) buffer occupancy is larger than a traffic volume measurement threshold, and sending the traffic volume indicator to a network in a transmitted message other than a CELL UPDATE message having uplink data transmission as an update cause. A second disclosed example method comprises, while operating in a first state, receiving a message that is to cause a wireless device to transition to a second state having fewer available radio resources than are available in the first state, and rejecting the message if the wireless device has pending uplink data to send to a network.

Claims

1. A method for a wireless device, the method comprising:

while operating in a first state having fewer available radio resources than would be available in a second state, setting a traffic volume indicator if the wireless device determines that a radio link control (RLC) buffer occupancy is larger than a traffic volume measurement threshold; and

sending the traffic volume indicator to a network in a transmitted message other than a CELL UPDATE message having uplink data transmission as an update cause.

2. A method as defined in claim 1 wherein the first state comprises at least one of a radio resource control (RRC) Cell_FACH state, an RRC Cell_PCH state, an RRC URA_PCH state or an RRC idle state, and the second state comprises an RRC Cell_DCH state.

3. A method as defined in claim 1 wherein the transmitted message comprises the CELL UPDATE message, and the update cause is one of radio link failure, cell reselection or radio RLC unrecoverable error.

4. A method as defined in claim 1 wherein the transmitted message comprises at least one of a RADIO BEARER RECONFIGURATION COMPLETE message, a RADIO BEARER SETUP COMPLETE message, a RADIO BEARER RELEASE COMPLETE message, a TRANSPORT CHANNEL RECONFIGURATION COMPLETE message, or a PHYSICAL CHANNEL RECONFIGURATION COMPLETE message.

5. A method as defined in claim 1 further comprising:

obtaining the traffic volume measurement threshold while operating in an RRC Cell_FACH state prior to operating in the first state; and

storing the traffic volume threshold for use when the wireless device is operating in the first state.

6. A method for a wireless device, the method comprising:

while operating in a first state, receiving a message that is to cause the wireless device to transition to a second state having fewer available radio resources than are available in the first state; and

rejecting the message if the wireless device has pending uplink data to send to a network.

7. A method as defined in claim 6 wherein the first state comprises a radio resource control (RRC) Cell_DCH state, and the second state comprises at least one of an RRC Cell_FACH state, an RRC Cell_PCH state, an RRC URA_PCH state or an RRC idle state.

8. A method as defined in claim 6 wherein the message includes an indication that rejection for uplink data is allowed.

9. A method as defined in claim 6 further comprising:

rejecting the message when an amount of the pending uplink data to send to the network is larger than a traffic volume measurement threshold; and

not rejecting the message when the amount of the pending uplink data to send to the network is not larger than the traffic volume measurement threshold.

10. A method as defined in claim 6 wherein rejecting the message comprises sending a failure response to the network, the failure response including pending uplink data as a failure cause.

11. A method as defined in claim 10 wherein the failure response comprises at least one of a RADIO BEARER RECONFIGURATION FAILURE message, a RADIO BEARER SETUP FAILURE message, a RADIO BEARER RELEASE FAILURE message, a TRANSPORT CHANNEL RECONFIGURATION FAILURE message, or a PHYSICAL CHANNEL RECONFIGURATION FAILURE message.

12. A method as defined in claim 6 wherein the message comprises at least one of a RADIO BEARER RECONFIGURATION message, a RADIO BEARER SETUP message, a RADIO BEARER RELEASE message, a TRANSPORT CHANNEL RECONFIGURATION message, or a PHYSICAL CHANNEL RECONFIGURATION message.

13. A tangible machine readable storage medium comprising machine readable instructions which, when executed, cause a machine to at least:

while a wireless device is operating in a first state having fewer available radio resources than would be available in a second state, set a traffic volume indicator if the machine determines that a radio link control (RLC) buffer occupancy is larger than a traffic volume measurement threshold; and

send the traffic volume indicator to a network in a transmitted message other than a CELL UPDATE message having uplink data transmission as an update cause.

14-17. -17. (canceled)

18. A tangible machine readable storage medium comprising machine readable instructions which, when executed, cause a machine to at least:

while a wireless device is operating in a first state, receive a message that is to cause the wireless device to transition to a second state having fewer available radio resources than are available in the first state; and

reject the message if the wireless device has pending uplink data to send to a network.

19-24. -24. (canceled)

25. A wireless device comprising:

a memory to store machine readable instructions; and

a processor configured to;

while the wireless device is operating in a first state having fewer available radio resources than would be available in a second state, set a traffic volume indicator if the processor determines that a radio link control (RLC) buffer occupancy is larger than a traffic volume measurement threshold; and

send the traffic volume indicator to a network in a transmitted message other than a CELL UPDATE message having uplink data transmission as an update cause.

27. A wireless device as defined in claim 25 wherein the transmitted message comprises the CELL UPDATE message, and the update cause is one of radio link failure, cell reselection or radio RLC unrecoverable error.

28. A wireless device as defined in claim 25 wherein the transmitted message comprises at least one of a RADIO BEARER RECONFIGURATION COMPLETE message, a RADIO BEARER SETUP COMPLETE message, a RADIO BEARER RELEASE COMPLETE message, a TRANSPORT CHANNEL RECONFIGURATION COMPLETE message, or a PHYSICAL CHANNEL RECONFIGURATION COMPLETE message.

26. (canceled)

29. (canceled)

30. A wireless device comprising:

a memory to store machine readable instructions; and

a processor configured to;

while the wireless device is operating in a first state, receive a message that is to cause the wireless device to transition to a second state having fewer available radio resources than are available in the first state; and

reject the message if the wireless device has pending uplink data to send to a network.

32. A wireless device as defined in claim 30 wherein the message includes an indication that rejection for uplink data is allowed.

34. A wireless device as defined in claim 30 wherein the processor is configured further to send a failure response to the network, the failure response including pending uplink data as a failure cause.

31. (canceled)

33. (canceled)

35-54. -54. (canceled)