Performance of a user equipment (UE) in unlicensed spectrum

Patent metadata

Field	Value
Publication number	US-9775048-B2
Application number	US-201414486778-A
Country	US
Kind code	B2
Filing date	Sep 15, 2014
Priority date	Sep 24, 2013
Publication date	Sep 26, 2017
Grant date	Sep 26, 2017

Abstract

The present disclosure presents a method and an apparatus for improving performance of a user equipment (UE) operating in unlicensed spectrum. For example, the disclosure presents a method for receiving, at the UE, a secondary component carrier (SCC) update from a small cell. The example method further includes tuning the UE to a second SCC in response to receiving the update. The update is received at the UE when the small cell operating on a first radio access technology (RAT) determines that a channel associated with a first SCC of the small cell is also in use by another entity operating on a second RAT. As such, improved performance of a user equipment (UE) operating in an unlicensed spectrum may be achieved.

First claim

What is claimed is:

1. A method for improving performance of a user equipment (UE) operating in unlicensed spectrum, comprising:
receiving, at the UE, a secondary component carrier (SCC) update from a small cell; and
tuning the UE to a second SCC in response to receiving the update, wherein the update is received at the UE when the small cell operating on a first radio access technology (RAT) determines that a channel associated with a first SCC of the small cell is also in use by another entity operating on a second RAT.

2. The method of claim 1 , wherein tuning the UE to the second SCC includes receiving data on the second SCC and wherein the tuning is performed via a frequency or a channel hopping.

3. The method of claim 2 , wherein the tuning includes de-activating of the first SCC and activating of the second SCC using media access control (MAC) layer commands.

4. The method of claim 2 , wherein a combination of cell global identity (CGI) and a public land mobile network identifier (PLMN ID) is used to orthogonalize the frequency or the channel hopping among base stations of the first RAT.

5. The method of claim 1 , further comprising:
receiving data from the small cell on the second SCC, wherein the data received at the UE is transmitted from the small cell by spreading the data among SCCs of the small cell in a non-uniform fashion.

6. The method of claim 1 , wherein the SSC update is received at the UE via a radio resource control (RRC) re-configuration message.

7. The method of claim 1 , wherein the first RAT is a long term evolution (LTE) and the second RAT is a wireless fidelity (Wi-Fi).

8. An apparatus for improving performance of a user equipment (UE) operating in unlicensed spectrum, comprising:
means for receiving, at the UE, a secondary component carrier (SCC) update from a small cell; and
means for tuning the UE to a second SCC in response to receiving the update, wherein the update is received at the UE when the small cell operating on a first radio access technology (RAT) determines that a channel associated with a first SCC of the small cell is also in use by another entity operating on a second RAT.

9. The apparatus of claim 8 , wherein means for tuning the UE to the second SCC includes means for receiving data on the second SCC and wherein the tuning is performed via a frequency or a channel hopping.

10. The apparatus of claim 9 , wherein the means for tuning includes means for de-activating of the first SCC and activating of the second SCC using media access control (MAC) layer commands.

11. The apparatus of claim 9 , wherein a combination of cell global identity (CGI) and a public land mobile network identifier (PLMN ID) is used to orthogonalize the frequency or the channel hopping among base stations of the first RAT.

12. The apparatus of claim 8 , further comprising:
means for receiving data from the small cell on the second SCC, wherein the data received at the UE is transmitted from the small cell by spreading the data among SCCs of the small cell in a non-uniform fashion.

13. The apparatus of claim 8 , wherein the SSC update is received at the UE via a radio resource control (RRC) re-configuration message.

14. The apparatus of claim 8 , wherein the first RAT is a long term evolution (LTE) and the second RAT is a wireless fidelity (Wi-Fi).

15. A non-transitory computer readable medium storing computer executable code for improving performance of a user equipment (UE) operating in unlicensed spectrum, comprising code to:
receive, via a secondary component carrier (SCC) update receiving component, a SCC update from a small cell; and
tune, via a SCC tuning component, the UE to a second SCC in response to receiving the update, wherein the update is received at the UE when the small cell operating on a first radio access technology (RAT) determines that a channel associated with a first SCC of the small cell is also in use by another entity operating on a second RAT.

16. The computer readable medium of claim 15 , wherein the code for tuning the UE to the second SCC includes code for tuning the UE from the first SCC to the second SCC and wherein the tuning is performed via a frequency or a channel hopping.

17. The computer readable medium of claim 16 , wherein the code for tuning includes code for de-activating of the first SCC and activating of the second SCC using media access control (MAC) layer commands.

18. The computer readable medium of claim 16 , wherein a combination of cell global identity (CGI) and a public land mobile network identifier (PLMN ID) is used to orthogonalize the frequency or the channel hopping among base stations of the first RAT.

19. The computer readable medium of claim 15 , further comprising:
code for receiving data from the small cell on the second SCC, wherein the data received at the UE is transmitted from the small cell by spreading the data among SCCs of the small cell in a non-uniform fashion.

20. The computer readable medium of claim 15 , wherein the SSC update is received at the UE via a radio resource control (RRC) re-configuration message.

21. The computer readable medium of claim 15 , wherein the first RAT is a long term evolution (LTE) and the second RAT is a wireless fidelity (Wi-Fi).

22. An apparatus for improving performance of a user equipment (UE) operating in unlicensed spectrum, comprising:
a memory; and
at least one processor coupled to the memory and configured to:
receive component to receive a SCC update from a small cell; and
tune the UE to a second SCC in response to receiving the update, wherein the update is received at the UE when the small cell operating on a first radio access technology (RAT) determines that a channel associated with a first SCC of the small cell is also in use by another entity operating on a second RAT.

23. The apparatus of claim 22 , wherein the at least one processor is further configured to tune the UE from the first SCC to the second SCC and wherein the tuning is performed via a frequency or a channel hopping.

24. The apparatus of claim 23 , wherein the at least one processor is further configured to de-activate the first SCC and activate the second SCC using media access control (MAC) layer commands.

25. The apparatus of claim 23 , wherein a combination of cell global identity (CGI) and a public land mobile network identifier (PLMN ID) is used to orthogonalize the frequency or the channel hopping among base stations of the first RAT.

26. The apparatus of claim 22 , wherein the at least one processor is further configured to receive data from the small cell on the second SCC, wherein the data received at the UE is transmitted from the small cell by spreading the data among second SCCs of the small cell in a non-uniform fashion.

27. The apparatus of claim 22 , wherein the SSC update is received at the UE via a radio resource control (RRC) re-configuration message.

28. The apparatus of claim 22 , wherein the first RAT is a long term evolution (LTE) and the second RAT is a wireless fidelity (Wi-Fi).

Assignees

• Qualcomm Inc

Inventors

• Reddy Akula Aneesh
• Valliappan Nachiappan
• Sadek Ahmed Kamel
• Ji Tingfang

Classifications

• H04W88/06

  adapted for operation in multiple networks {or having at least two operational modes}, e.g. multi-mode terminals · CPC title

• H04W72/0453

  Resources in frequency domain, e.g. a carrier in FDMA · CPC title

• H04W16/14 Primary

  Spectrum sharing arrangements {between different networks} · CPC title

• H04W84/12

  WLAN [Wireless Local Area Networks] · CPC title

• H04L5/0098

  Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands · CPC title