Apparatus and method for improving device handover during a call

Patent metadata

Field	Value
Publication number	US-9609552-B2
Application number	US-201313801602-A
Country	US
Kind code	B2
Filing date	Mar 13, 2013
Priority date	Apr 4, 2012
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

Disclosed are methods and apparatus for improving the performance of a user equipment handover during a data call. In one aspect, a source base station determines to handover user equipment (UE) to a target base station. The source base station first determines whether the UE is in a data call prior to the handover. The source base station then modifies one or more of connected mode discontinuous reception (CDRX) and semi-persistent scheduling (SPS) parameters with the UE based on determining to handover the UE and determining that the UE is in the data call.

First claim

What is claimed is:

1. A method for performing handover, comprising:
communicating, by a serving base station, with a user equipment (UE) to provide wireless network access to the UE;
determining, by the serving base station, to handover the UE to a target base station;
determining, by the serving base station and based at least in part on evaluating one or more parameters including one or more of connected mode discontinuous reception (CDRX) parameters or semi-persistent scheduling (SPS) parameters with the UE, whether the UE is in a data call prior to the handover, wherein the data call is at least one of a voice over internet protocol (VoIP) call or a VoIP over long term evolution (VoLTE) call; and
modifying, by the serving base station, the one or more parameters with the UE based on determining to handover the UE and determining that the UE is in the data call.

2. The method of claim 1 , wherein the modifying the one or more parameters comprises disabling a CDRX mode with the UE.

3. The method of claim 1 , wherein the modifying the one or more parameters comprises adjusting an OFF duration of the CDRX mode.

4. The method of claim 1 , wherein the modifying the one or more parameters comprises disabling SPS for the UE.

5. The method of claim 1 , wherein the modifying the one or more parameters comprises increasing frequency of grants in the SPS for the UE.

6. The method of claim 1 , wherein modifying the one or more parameters comprises assigning one or more uplink grants to the UE before sending a handover command to the UE.

7. An apparatus for performing handover, comprising:
a memory storing one or more of connected mode discontinuous reception (CDRX) parameters or semi-persistent scheduling (SPS) parameters for a user equipment (UE);
at least one processor coupled to the memory and configured to:
communicate with the UE to provide wireless network access to the UE;
determine to handover the UE to a target base station;
determine, based at least in part on evaluating one or more parameters including the one or more of CDRX parameters or SPS parameters with the UE, whether the UE is in a data call prior to the handover, wherein the data call is at least one of a voice over internet protocol (VoIP) call or a VoIP over long term evolution (VoLTE) call; and
modify the parameters with the UE based on determining to handover the UE and determining that the UE is in the data call.

8. The apparatus of claim 7 , wherein the modifying the one or more parameters comprises disabling a CDRX mode with the UE.

9. The apparatus of claim 7 , wherein the modifying the one or more parameters comprises adjusting an OFF duration of the CDRX mode.

10. The apparatus of claim 7 , wherein the modifying the one or more parameters comprises disabling SPS for the UE.

11. The apparatus of claim 7 , wherein the modifying the one or more parameters comprises increasing frequency of grants in the SPS for the UE.

12. The apparatus of claim 7 , wherein to modify the one or more parameters comprises, the processor assigns one or more uplink grants to the UE before sending a handover command to the UE.

13. An apparatus for performing handover, comprising:
means for communicating with a user equipment (UE) to provide wireless network access to the UE;
means for determining to handover the UE to a target base station;
means for determining, based at least in part on evaluating one or more parameters including one or more of connected mode discontinuous reception (CDRX) parameters or semi-persistent scheduling (SPS) parameters with the UE, whether the UE is in a data call prior to the handover, wherein the data call is at least one of a voice over internet protocol (VoIP) call or a VoIP over long term evolution (VoLTE) call; and
means for modifying the one or more parameters with the UE based on determining to handover the UE and determining that the UE is in the data call.

14. The apparatus of claim 13 , wherein the modifying the one or more parameters comprises disabling a CDRX mode with the UE.

15. The apparatus of claim 13 , wherein the modifying the one or more parameters comprises adjusting an OFF duration of the CDRX mode.

16. The apparatus of claim 13 , wherein the modifying the one or more parameters comprises disabling SPS for the UE.

17. The apparatus of claim 13 , wherein the modifying the one or more parameters comprises increasing frequency of grants in the SPS for the UE.

18. The apparatus of claim 13 , wherein modifying the one or more parameters comprises assigning one or more uplink grants to the UE before sending a handover command to the UE.

19. A non-transitory computer-readable storage medium comprising computer-executable code for performing handover, comprising:
code for communicating, by a serving base station, with a user equipment (UE) to provide wireless network access to the UE;
code for determining, by the serving base station, to handover the UE to a target base station;
code for determining, by the serving base station and based at least in part on evaluating one or more parameters including one or more of connected mode discontinuous reception (CDRX) parameters or semi-persistent scheduling (SPS) parameters with the UE, whether the UE is in a data call prior to the handover, wherein the data call is at least one of a voice over Internet protocol (VoIP) call or a VoIP over long term evolution (VoLTE) call; and
code for modifying, by the serving base station, the one or more parameters with the UE based on determining to handover the UE and determining that the UE is in the data call.

20. The non-transitory computer-readable storage medium of claim 19 , wherein the code for modifying modifies the one or more parameters at least in part by disabling a CDRX mode with the UE.

21. The non-transitory computer-readable storage medium of claim 19 , wherein the code for modifying modifies the one or more parameters at least in part by adjusting an OFF duration of the CDRX mode.

22. The non-transitory computer-readable storage medium of claim 19 , wherein the code for modifying modifies the one or more parameters at least in part by disabling SPS for the UE.

23. The non-transitory computer-readable storage medium of claim 19 , wherein the code for modifying modifies the one or more parameters at least in part by increasing frequency of grants in the SPS for the UE.

24. The non-transitory computer-readable storage medium of claim 19 , wherein code for modifying modifies the one or more parameters at least in part by assigning one or more uplink grants to the UE before sending a handover command to the UE.

25. A method for performing handover, comprising:
receiving, by a target base station, handover of a user equipment (UE);
determining, by the target base station, whether one or more memory buffers related to downlink or uplink traffic for the UE are cleared following the handover; and
modifying, by the target base station, one or more of connected mode discontinuous reception (CDRX) and semi-persistent scheduling (SPS) parameters with the UE based on determining that the one or more memory buffers are cleared.

26. The method of claim 25 , wherein the modifying the one or more parameters comprises enabling the CDRX mode with the UE.

27. The method of claim 25 , wherein the modifying the one or more parameters comprises adjusting an OFF duration of CDRX mode with the

Assignees

• Qualcomm Inc

Inventors

• Ramachandran Shyamal
• Klingenbrunn Thomas
• Ehsan Navid
• Aminzadeh Gohari Amir
• Wang Min
• Balasubramanian Srinivasan

Classifications

• H04W72/23

  in the downlink direction of a wireless link, i.e. towards a terminal · CPC title

• H04W72/042

  Electricity · mapped topic

• H04W76/048

  Electricity · mapped topic

• H04W36/0011 Primary

  for data sessions of end-to-end connection · CPC title

• H04W36/0033 Primary

  with transfer of context information · CPC title