Method and device for switching

• US 8,824,369 B2
• Filed: 10/27/2011
• Issued: 09/02/2014
• Est. Priority Date: 04/27/2009
• Status: Active Grant

• Current Assignee: Nokia Technologies Oy (Nokia Corporation)
• Original Assignee: Huawei Technologies Co., Ltd. (Huawei Investment & Holding Co., Ltd.)
• Inventors: Yan, Kun, Ma, Xueli, Liu, Qi, Gao, Yongqiang, Wang, Zonejie, Zheng, Xiaoxiao
• Primary Examiner(s): Faroul, Farah
• Application Number:
  US13/282,881
• Publication Number:
  US 20120039294A1
• Time in Patent Office: 1,041 Days
• Field of Search: 370/252, 370/328, 370/329
• US Class Current: 370/328
• CPC Class Codes: H04W 24/08 Testing, supervising or monitoring using real traffic
• CPC Class Codes: H04W 36/0005 Control or signalling for completing the hand-off
• CPC Class Codes: H04W 36/06 Reselecting a communication resource in the serving access point
• CPC Class Codes: H04W 72/20 Control channels or signalling for resource management

Abstract

A switching method and device are disclosed by the present invention. The switching method according to the embodiments of the present invention includes: receiving from a base station a switching indication information that requires a UE to switch a TTI; sending to the base station a switching confirmation information with which the switching indication information is confirmed; and switching the TTI. The switching method according to the embodiments of the present invention includes: sending to a UE a switching indication information that requires the UE to switch a TTI; and receiving from the UE a switching confirmation information with which the switching indication information is confirmed. By using the switching method and device according to the embodiments of the present invention, the delay of switching the TTI can be shortened and the TTI can be switched quickly.

Claims

1. A method comprising:

receiving, by a user equipment (UE), a high-speed shared control channel (HS-SCCH) order carrying a switching indication information instructing the UE to switch a transmission time interval (TTI), wherein the switching indication information is received from a base station;

sending to the base station a switching confirmation information, wherein the switching indication information is confirmed with the switching confirmation information; and

switching the TTI.

2. The method according to claim 1, wherein sending to the base station the switching confirmation information comprises:

sending the switching confirmation information to the base station through a transport format combination indicator (TFCI) corresponding to a transport block (TB), which is forbidden to be used within a current TTI, on an enhanced dedicated channel (E-DCH) dedicated physical control channel (E-DPCCH);

or

sending the switching confirmation information to the base station by adding an indicator to a media access control (MAC) header or scheduling information of an enhanced dedicated channel (E-DCH) dedicated physical data channel (E-DPDCH).

3. The method according to claim 1, further comprising:

reporting a ratio of UE maximum transmit power to dedicated physical control channel (DPCH) power, wherein the ratio of the UE maximum transmit power to the dedicated physical control channel (DPCH) power is used by the base station to determine whether UE uplink transmit power is limited;

wherein receiving the switching indication information comprises receiving the switching indication information sent by the base station if the base station determines that the UE uplink transmit power is limited.

4. The method according to claim 1, further comprising:

obtaining from the base station feedback information in response to the switching confirmation information;

wherein switching the TTI comprises switching the TTI at a next connection frame number (CFN) upon receiving the feedback information from the base station.

5. The method according to claim 1, wherein switching the TTI comprises:

obtaining reconfiguration resources and switching the TTI in the next CFN in accordance with the reconfiguration resources, wherein the reconfiguration resources are broadcasted by a radio network controller (RNC) or are default reconfiguration resources stored in the UE.

6. A method comprising:

sending, by a base station, a high-speed shared control channel (HS-SCCH) order to a user equipment (UE), the HS-SCCH order carrying a switching indication information instructing the UE to switch a transmission time interval (TTI); and

receiving from the UE a switching confirmation information confirming that the UE has switched the TTI.

7. The method according to claim 6, wherein receiving the switching confirmation information comprises:

receiving the switching confirmation information from the base station through a E-DCH transport format combination indicator (E-TFCI) corresponding to a transport block (TB), which is forbidden to be used within a current TTI, on an enhanced dedicated channel (E-DCH) dedicated physical control channel (E-DPCCH);

or

receiving the switching confirmation information that is sent by the UE by adding an indicator to a media access control (MAC) header or scheduling information of an enhanced dedicated channel (E-DCH) dedicated physical data channel (E-DPDCH).

8. The method according to claim 6, further comprising:

receiving a ratio of maximum transmit power to dedicated physical control channel (DPCH) power reported by the UE, wherein the ratio of the maximum transmit power to the dedicated physical control channel (DPCH) power is used to determine whether UE uplink transmit power is limited;

wherein sending to the UE the switching indication information that requires the UE to switch the TTI comprises;

sending the switching indication information to the UE, after determining that the UE uplink transmit power is limited according to the ratio of the maximum transmit power to the DPCH power reported by the UE.

9. The method according to claim 6, wherein after receiving from the UE the switching confirmation information, the method further comprises:

sending feedback information in response to the switching confirmation information to the UE.

10. The method according to claim 6, wherein after receiving from the UE the switching confirmation information, the method further comprises:

sending to a radio network controller (RNC) a switching complete information indicating that the UE has switched the TTI.

11. The method according to claim 10, wherein sending to the RNC the switching complete information comprises:

sending the switching complete information to the RNC through Node B Application Part (NBAP) signaling.

12. A user equipment (UE), comprising:

a first receiving module, configured to receive a high-speed shared control channel (HS-SCCH) order from a base station, the HS-SCCH order carrying a switching indication information that instructs the UE to switch a transmission time interval (TTI);

a sending module, configured to send a switching confirmation information with which the switching indication information is confirmed; and

a processing module, configured to switch the TTI.

13. The UE according to claim 12, wherein the sending module comprises a first sending subunit or a second sending subunit, wherein the first sending subunit is configured to send the switching confirmation information to the base station through an E-DCH transport format combination indicator, E-TFCI, corresponding to a transport block, TB, which is forbidden to be used within a current TTI, on an enhanced dedicated channel, E-DCH, physical control channel, E-DPCCH;

and

a second sending subunit is configured to send the switching confirmation information to the base station by adding an indicator to a media access control, MAC, header or scheduling information of an enhanced dedicated physical data channel, E-DPDCH.

14. The UE according to claim 12, further comprising:

a reporting module, configured to report a ratio of UE maximum transmit power to dedicated physical control channel (DPCH) power, wherein the ratio of the UE maximum transmit power to the DPCH power is used by the base station to determine whether UE uplink transmit power is limited;

wherein the first receiving module is further configured to receive the switching indication information sent by the base station if the base station determines that the UE uplink transmit power is limited.

15. The UE according to claim 12, further comprising a second receiving module, configured to receive from the base station feedback information in response to the switching confirmation information;

wherein the processing module is further configured to switch the TTI if the second receiving module receives the feedback information.

16. The UE according to claim 12, wherein the processing module comprises:

an obtaining unit, configured to obtain reconfiguration resources; and

a reconfiguring unit, configured to switch the TTI according to the reconfiguration resources;

wherein the reconfiguration resources are broadcasted by a radio network controller (RNC) or default reconfiguration resources stored in the UE.

17. A base station, comprising:

a first sending module, configured to send a high-speed shared control channel (HS-SCCH) order to a user equipment (UE), the HS-SCCH order carrying a switching indication information that instructs the UE to switch a transmission time interval (TTI); and

a receiving module, configured to receive from the UE a switching confirmation information with which the switching indication information is confirmed.

18. The base station according to claim 17, further comprising a second sending module, configured to send feedback information in response to the switching confirmation information to the UE if the first receiving module receives the switching confirmation information that is sent by the UE by adding an indicator to a media access control, MAC, header or scheduling information of an enhanced dedicated channel, E-DCH, dedicated physical data channel, E-DPDCH.

19. The base station according to claim 17, further comprising:

a second receiving module, configured to receive a ratio of maximum transmit power to dedicated physical control channel (DPCH) power reported by the UE, and a determining module, configured to determine whether UE uplink transmit power is limited according to the ratio of the maximum transmit power to the DPCH power;

wherein the first sending module is further configured to send the switching indication information to the UE if the determining module determines that the UE uplink transmit power is limited.

20. The base station according to claim 17, further comprising a third sending module, configured to send to a radio network controller (RNC) a switching complete information indicating that the UE has switched the TTI.