Activation time for target based high speed serving cell change

• US 9,961,597 B2
• Filed: 09/23/2015
• Issued: 05/01/2018
• Est. Priority Date: 04/01/2008
• Status: Active Grant

• Current Assignee: Telefonaktiebolaget LM Ericsson
• Original Assignee: Telefonaktiebolaget LM Ericsson
• Inventors: Wager, Stefan
• Primary Examiner(s): Oveissi, David
• Assistant Examiner(s): Wood, Jonathan B
• Application Number:
  US14/862,938
• Publication Number:
  US 20160014652A1
• Time in Patent Office: 951 Days
• CPC Class Codes: H04W 36/00837 Determination of triggering parameters for hand-off
• CPC Class Codes: H04W 36/08 Reselecting an access point
• CPC Class Codes: H04W 36/36 by user or terminal equipment
• CPC Class Codes: H04W 84/042 Public Land Mobile systems, e.g. cellular systems

Abstract

The present solution relates to a method in a user equipment (310) for setting up an activation time of a cell change of the user equipment (310) from a serving cell (305) to a target cell (308) in a wireless communications network (300). The user equipment (310) receives (501) a timing offset from a network controller (315), calculates (502) a cell change activation time based on the timing offset and transmits (503) the calculated activation time to the network controller (315). Then, the user equipment (310) receives (504) an approval of the cell change from the network controller (315) and moves (505) from the serving cell (306) to the target cell (308) at the activation time if the approval has been received.

Claims

1. A method in a user equipment for setting up an activation time of a high speed downlink shared channel cell change of the user equipment from a first cell to a second cell in a wireless communications network, the method comprising:

receiving a timing offset from the wireless communications network through broadcast or dedicated signaling at call setup;

calculating a high speed downlink shared channel cell change activation time based on the received timing offset, the activation time indicating when the user equipment can perform a cell change from the first cell to the second cell;

transmitting the calculated activation time from the user equipment to the wireless communications network;

receiving an approval of the downlink shared channel high speed cell change from the wireless communications network; and

performing a cell change from the first cell to the second cell at the activation time if the approval has been received.

2. The method of claim 1, further comprising sending an acknowledgement to the wireless communications network.

3. The method of claim 1, wherein the activation time comprises a connection frame number in which the user equipment will initiate the cell change.

4. The method of claim 1, wherein receiving the approval of the cell change comprises receiving an indication that the user equipment has been scheduled on a high speed downlink control channel in the second cell.

5. The method of claim 1, further comprising monitoring a high speed downlink control channel of the second cell until the activation time expires.

6. The method of claim 1, further comprising transmitting the activation time to the wireless communications network in a measurement report.

7. A method in a wireless communications network for setting up an activation time of a high speed downlink shared channel cell change of a user equipment from a first cell to a second cell in a wireless communications network, the method comprising:

transmitting a timing offset from a network node to the user equipment through broadcast or dedicated signalling at call setup;

receiving an activation time from the user equipment, the activation time indicating when the user equipment can perform a cell change from the first cell to the second cell;

deciding to initiate the cell change to change the user equipment from the first cell to the second cell;

configuring the first cell and the second cell with the activation time;

receiving a configuration confirmation from the first cell and the second cell; and

sending an approval of the high speed downlink shared channel cell change to the user equipment.

8. The method of claim 7, further comprising receiving an acknowledgement from the user equipment.

9. The method of claim 7, wherein the activation time is a connection frame number in which the user equipment will perform the cell change.

10. The method of claim 7, wherein sending the approval of the high speed downlink shared channel cell change comprises:

scheduling the user equipment on a high speed downlink control channel in the second cell; and

transmitting to the user equipment an indication that the user equipment has been scheduled.

11. The method of claim 7, further comprising receiving the activation time from the user equipment in a measurement report.

12. A user equipment apparatus in a wireless communication network wherein the apparatus is configured to set up an activation time of a high speed downlink shared channel cell change from a first cell to a second cell, the apparatus comprising:

a receiver configured to receive a timing offset from the wireless communications network through broadcast or dedicated signalling at call setup;

a processor configured to calculate a high speed downlink shared channel cell change activation time based on the received timing offset, the activation time indicating when the user equipment can perform a cell change from the first cell to the second cell; and

a transmitter configured to transmit the calculated activation time to the wireless communications network,

wherein the receiver is further configured to receive an approval of the high speed downlink shared channel cell change through the interface; and

wherein the processor is further configured to perform a cell change from the first cell to the second cell at the activation time if the approval has been received.

13. The apparatus of claim 12, wherein the transmitter is further configured to send an acknowledgement to the wireless communications network.

14. The apparatus of claim 12, wherein the activation time is a connection frame number in which the apparatus will move to the second cell.

15. The apparatus of claim 12, wherein the receiver is further configured to receive the approval of the high speed downlink shared channel cell change by receiving an indication that the user equipment has been scheduled on a high speed downlink control channel in the second cell.

16. The apparatus of claim 12, wherein the apparatus is configured to monitor a high speed downlink control channel of the second cell until the activation time expires.

17. The apparatus of claim 12, wherein the apparatus is configured to transmit the activation time to the wireless communications network in a measurement report.

18. A wireless communication apparatus, wherein the apparatus is capable of setting an activation time for a high speed downlink shared channel cell change of a user equipment from a first cell to a second cell in a wireless communications network, the apparatus comprising:

a transmitter configured to transmit a timing offset to the user equipment through broadcast or dedicated signalling at call setup;

a receiver configured to receive an activation time from the user equipment, the activation time indicating when the user equipment can perform a cell change from the first cell to the second cell; and

a processor configured to decide whether to initiate the cell change to change the user equipment from the first cell to the second cell and to configure the first cell and the second cell with the activation time,

wherein the receiver is further configured to receive a configuration confirmation from the first cell and the second cell; and

wherein the transmitter is further configured to send an approval of the high speed downlink shared channel cell change to the user equipment.

19. The apparatus of claim 18, wherein the receiver is further configured to receive an acknowledgement from the user equipment.

20. The apparatus of claim 18, wherein the activation time is a connection frame number in which the user equipment will initiate the cell change.

21. The apparatus of claim 18, wherein the transmitter is configured to send the approval of the high speed downlink shared channel cell change by:

scheduling the user equipment on a high speed downlink control channel in the second cell; and

transmitting to the user equipment an indication that the user equipment has been scheduled.

22. The apparatus of claim 18, wherein the receiver is configured to receive the activation time from the user equipment in a measurement report.