Forwarding learnt state information to target node at mobility
View Patent ↗A method for handover in a telecommunication system is disclosed. The method determines a traffic time pattern in a handover situation where a user equipment is handed over from a source cell to a target cell in the telecommunication system. History information relating to a traffic time pattern used in the source cell by the user equipment being handed over is forwarded from a controller node of said source cell to a controller node of said target cell. In the target cell, a traffic time pattern to be used by said user equipment in said target cell after the handover is estimated by taking into consideration at least said history information.
1. A controller node of a source cell, comprising at least one processor coupled with a transmitter, wherein the processor is configured to:
obtain a counting up time started from a last data transmission in any one of uplink or downlink of a mobile user equipment (UE), which is about to be handed over from the source cell to another control node of a target cell in a telecommunication system as a result of physical movement of the mobile UE, wherein the counting up time counts up time started from the last data transmission in any one of uplink or downlink of the mobile UE in the source cell until a handover preparation process is initiated; and
control the transmitter to send, to the another control node of the target cell, the counting up time for radio resource management after the UE is handed over to the target cell, and configuration information for uplink scheduling request in the source cell using a handover preparation message, during the handover preparation process, wherein the uplink scheduling request is sent by the UE to request uplink resources from the source cell which is different from data communication, and wherein the configuration information for uplink scheduling request comprises:
(a) information of dedicated uplink radio resources in the source cell; and
(b) a rule for when the UE is allowed to do explicit uplink scheduling requests in the source cell;
wherein the controller node of the source cell and the another controller node of the target cell are evolved Node B (eNBs) in a Long Term Evolution (LTE) system, and the counting up time is sent via an X 2 interface between the eNBs.
2. The controller node according to claim 1 , wherein the processor is further configured to:
control the transmitter to send, to the another control node of the target cell, a history of the mobile UE in a plurality of previous cells prior to the target cell, the history relating to behavior of the mobile UE in a timeplane.
3. The controller node according to claim 1 , wherein the processor is further configured to:
control the transmitter to send, to the another control node of the target cell, information indicating a radio resource that can be used by the mobile UE for an uplink scheduling request.
4. The controller node according to claim 3 , wherein the information indicating the radio resource that can be used by the mobile UE for the uplink scheduling request comprises: information indicating a dedicated code for code division multiplex access.
5. The controller node according to claim 3 , wherein the information indicating the radio resource that can be used by the mobile UE for the uplink scheduling request comprises: information indicating a time and frequency resource and a dedicated code for code division multiplex access.
6. The controller node according to claim 3 , wherein the information indicating the radio resource that can be used by the mobile UE for the uplink scheduling request comprises: information indicating a time and frequency resource.
7. The controller node according to claim 1 , wherein the processor is further configured to:
control the transmitter to send, to the another control node of the target cell, a Discontinuous Reception (DRX) configuration used in the source cell.
8. The controller node according to claim 7 , wherein the DRX configuration comprises a DRX cycle length.
9. The controller node according to claim 1 , wherein the processor is further configured to:
control the transmitter to send, to the controller node of the target cell, configuration of a control channel.
10. The controller node according to claim 1 , wherein the processor is further configured to:
control the transmitter to send, to the controller node of the target cell, persistent scheduling configuration.
11. A method, comprising:
obtaining, by a controller node of a source cell, a counting up time started from a last data transmission in any one of uplink or downlink of the mobile UE, the mobile UE is about to be handed over from the source cell to a target cell in a telecommunication system as a result of physical movement of the mobile UE, wherein-the counting up time counts up time started from the last data transmission in any one of uplink or downlink of the mobile UE in the source cell until a handover preparation process is initiated; and
during the handover preparation process, sending, by the controller node of the source cell to a controller node of the target cell, using a handover preparation message, the counting up time for radio resource management after the UE is handed over to the target cell, and configuration information for uplink scheduling request in the source cell using a handover preparation message, wherein the uplink scheduling request is sent by the UE to request uplink resources from the source cell which is different from data communication, and wherein the configuration information for uplink scheduling request comprises:
(a) information of dedicated uplink radio resources in the source cell; and
(b) a rule for when the UE is allowed to do explicit uplink scheduling requests in the source cell;
wherein the controller node of the source cell and the controller node of the target cell are evolved Node B (eNBs) in a Long Term Evolution (LTE) system, and the handover preparation message is sent via an X 2 interface between the eNBs.
12. The method according to claim 11 , further comprising:
sending, by the controller node of the source cell to the controller node of the target cell, a history of the mobile UE in a plurality of previous cells prior to the target cell, the history relating to behavior of the mobile UE in a timeplane.
13. The method according to claim 11 , further comprising:
sending, by the controller node of the source cell to the controller node of the target cell, information indicating a radio resource that can be used by the mobile UE for an uplink scheduling request.
14. The method according to claim 13 , wherein the information indicating the radio resource that can be used by the mobile UE for the uplink scheduling request comprises: information indicating a time and frequency resource, or a dedicated code for code division multiplex access, or information indicating the time and frequency resource and the dedicated code for code division multiplex access.
15. A telecommunication system, comprising a first controller node of a source cell in communication with a second controller node of a target cell, wherein the first controller node is configured to:
obtain a counting up time started from a last data transmission in any one of uplink or downlink of a mobile user equipment (UE) which is about to be handed over from the source cell to the target cell as a result of physical movement of the mobile UE, wherein the counting up time counts up time started from the last data transmission in any one of uplink or downlink of the mobile UE in the source cell until a handover preparation process is initiated; and
send, to the second controller node of the target cell during the handover preparation process, the counting up time for radio resource management after the UE is handed over to the target cell, and configuration information for uplink scheduling request in the source cell using a handover preparation message, wherein the uplink scheduling request is sent by the UE to request uplink resources from the source cell which is different from data communication, and wherein the configuration information for uplink scheduling request comprises:
(a) information of dedicated uplink radio resources in the source cell; and
(b) a rule for when the UE is allowed to do explicit uplink scheduling requests in the source cell;
wherein the second controller node is configured to receive the counting up time sent by the first controller node, and the first controller node and the second controller node are evolved Node B (eNBs) in a Long Term Evolution (LTE) system, and the counting up time is sent via an X 2 interface between the eNBs.
16. The telecommunication system according to claim 15 , wherein the first controller node is further configured to send, to the second controller node, a history of the mobile UE in a plurality of previous cells prior to the target cell, the history relating to behavior of the mobile UE in a timeplane.
17. The telecommunication system according to claim 15 , wherein the first controller node is configured to: send, to the second controller node of the target cell during the handover preparation process, information indicating a radio resource that can be used by the mobile UE for an uplink scheduling request.
18. The telecommunication system according to claim 17 , wherein the information indicating the radio resource that can be used by the mobile UE for the uplink scheduling request comprises: information indicating a time and frequency resource, or a dedicated code for code division multiplex access, or information indicating the time and frequency resource and the dedicated code for code division multiplex access.