HYBRID MANAGEMENT OF HANDOVERS IN A SELF ORGANIZING NETWORK (SON)

• US 20150092744A1
• Filed: 08/26/2014
• Published: 04/02/2015
• Est. Priority Date: 10/01/2013
• Status: Active Grant

• Current Assignee: Qualcomm, Inc.
• Original Assignee: Qualcomm, Inc.
• Inventors: SINGH, Damanjit, Prakash, Rajat
• Granted Patent: US 10,004,008 B2
• Time in Patent Office: Days
• US Class Current: 370/331
• CPC Class Codes: H04L 47/29 using a combination of thresholds
• CPC Class Codes: H04W 28/0247 based on conditions of the access network or the infrastructure network central resource management H04W28/16
• CPC Class Codes: H04W 28/0284 detecting congestion or overload during communication monitoring arrangements H04L43/00
• CPC Class Codes: H04W 36/0061 of neighbour cell information
• CPC Class Codes: H04W 36/04 Reselecting a cell layer in multi-layered cells
• CPC Class Codes: H04W 36/22 for handling the traffic
• CPC Class Codes: H04W 84/18 Self-organising networks, e.g. ad-hoc networks or sensor networks

Abstract

The present disclosure presents a method and an apparatus for hybrid management of handovers in a self organizing network. For example, the disclosure presents a method for transmitting, via a transmitting component at the base station, handover signaling data from the base station to a network entity, wherein the base station is one of a plurality of base stations transmitting handover signaling data to the network entity, receiving, at the base station, feedback associated with one or more handover parameters of the base station, wherein the feedback is received from the network entity and includes an indication of an amount of handover signaling data generated by the base station or the plurality of base stations, and updating the one or more handover parameters based on the feedback received and local information available at the base station. As such, hybrid management of handover in a self organizing network may be achieved.

Claims

1. A method for hybrid management of handovers at a base station in a self organizing network (SON), comprising:

transmitting, via a transmitting component at the base station, handover signaling data from the base station to a network entity, wherein the base station is one of a plurality of base stations transmitting handover signaling data to the network entity;

receiving, at the base station, feedback associated with one or more handover parameters of the base station, wherein the feedback is received from the network entity and includes an indication of an amount of handover signaling data generated by the base station or the plurality of base stations; and

updating the one or more handover parameters at the base station based on the feedback received and local information available at the base station.

2. The method of claim 1, wherein the local information available at the base station is based on at least one of the amount of handover signaling data generated at the base station, a handover rate at the base station, a number of users served at the base station, mobility performance of user equipments (UEs) served by the base station, radio link failures at the base station, velocity of UEs served by the base station, a transmit power of the base station, and combinations thereof.

3. The method of claim 1, wherein receiving the feedback at the base station further includes whether the base station is generating handover signaling data at a rate which is higher or lower than a first threshold value, wherein the first threshold value is calculated at the network entity based at least on a capacity of the network entity and a number of base stations in the SON.

4. The method of claim 1, wherein receiving the feedback at the base station includes:

receiving an indication on whether the network entity is receiving handover signaling data at a rate which is higher or lower than a second threshold value, wherein the second threshold value is calculated at the network entity based at least on a capacity of the network entity.

5. The method of claim 1, further comprising:

determining the local information available at the base station.

6. The method of claim 1, wherein the updating of the one or more handover parameters at the base station comprises:

updating at least one of a hysteresis parameter, a time-to-trigger (TTT) parameter, a filter coefficient, an event offset parameter, a cell individual offset (CIO) parameter, a reporting range parameter, a frequency offset parameter at the base station, and combinations thereof.

7. The method of claim 1, further comprising:

determining the handover signaling data at the base station based on at least one of a handover preparation procedure, a handover resource allocation procedure, a handover notification procedure, a path switch request procedure, a handover cancel procedure, a serial number (SN) status transfer procedure, and combinations thereof.

8. The method of claim 1, wherein the updating of the one or more handover parameters at the base station comprises:

initiating a handover from a first base station on a first layer to a second base station on a second layer to migrate a user equipment (UE) that is generating signaling at a rate higher than a third threshold value on the first layer, wherein the third threshold value is determined at the base station.

9. The method of claim 8, wherein the first and the second base stations are different types of base stations or configured with different frequencies.

10. An apparatus for hybrid management of handovers at a base station in a self organizing network (SON), comprising:

means for transmitting, via a transmitting component at the base station, handover signaling data from the base station to a network entity, wherein the base station is one of a plurality of base stations transmitting handover signaling data to the network entity;

means for receiving, at the base station, feedback associated with one or more handover parameters of the base station, wherein the feedback is received from the network entity and includes an indication of an amount of handover signaling data generated by the base station or the plurality of base stations; and

means for updating the one or more handover parameters at the base station based on the feedback received and local information available at the base station.

11. The apparatus of claim 10, wherein the local information available at the base station is based on at least one of the amount of handover signaling data generated at the base station, a handover rate at the base station, a number of users served at the base station, a mobility performance of user equipments (UEs) served by the base station, radio link failures at the base station, velocity of UEs served by the base station, a transmit power of the base station, and combinations thereof.

12. The apparatus of claim 10, wherein means for receiving feedback at the base station further includes whether the base station is generating handover signaling data at a rate which is higher or lower than a first threshold value, wherein the first threshold value is calculated at the network entity based at least on a capacity of the network entity and a number of base stations in the SON.

13. The apparatus of claim 10, wherein means for receiving feedback at the base station includes:

means for receiving an indication on whether the network entity is receiving handover signaling data at a rate which is higher or lower than a second threshold value, wherein the second threshold value is calculated at the network entity based at least on a capacity of the network entity.

14. The apparatus of claim 10, wherein means for updating the one or more handover parameters at the base station comprises:

means for updating at least one of a hysteresis parameter, a time-to-trigger (TTT) parameter, a filter coefficient, an event offset parameter, a cell individual offset (CIO) parameter, a reporting range parameter, a frequency offset parameter at the base station, and combinations thereof.

15. The apparatus of claim 10, further comprising:

means for determining the handover signaling data at the base station based on at least one of a handover preparation procedure, a handover resource allocation procedure, a handover notification procedure, a path switch request procedure, a handover cancel procedure, a serial number (SN) status transfer procedure, and combinations thereof.

16. The apparatus of claim 10, further comprising:

means for initiating a handover from a first base station on a first layer to a second base station on a second layer to migrate a user equipment (UE) that is generating signaling at a rate higher than a third threshold value on the first layer, wherein the third threshold value is determined at the base station.

17. An apparatus for hybrid management of handovers at a base station in a self organizing network (SON), comprising:

a handover signaling data transmitting component to transmit handover signaling data from the base station to a network entity, wherein the base station is one of a plurality of base stations transmitting handover signaling data to the network entity;

a feedback receiving component to receive, at the base station, feedback associated with one or more handover parameters of the base station, wherein the feedback is received from the network entity and includes an indication on an amount of handover signaling data generated by the base station or the plurality of base stations; and

a handover parameter updating component to update the one or more handover parameters at the base station based on the feedback received and local information available at the base station.

18. The apparatus of claim 17, wherein the handover parameter updating component is further configured to update the one or more handover parameters at the base station based on at least one of the amount of handover signaling data generated at the base station, a handover rate at the base station, a number of users served at the base station, mobility performance of user equipments (UEs) served by the base station, radio link failures at the base station, velocity of UEs served by the base station, a transmit power of the base station, and combinations thereof.

19. The apparatus of claim 17, wherein the feedback receiving component is further configured to receive an indication, from the network entity, on whether the base station is generating handover signaling data at a rate which is higher or lower than a first threshold value, wherein the first threshold value is calculated at the network entity based at least on a capacity of the network entity and a number of base stations in the SON.

20. The apparatus of claim 17, wherein the feedback receiving component is further configured to:

receive an indication on whether the network entity is receiving handover signaling data at a rate which is higher or lower than a second threshold value, wherein the second threshold value is calculated at the network entity based at least on a capacity of the network entity.

21. The apparatus of claim 17, wherein the handover parameter updating component is further configured to update at least one of a hysteresis parameter, a time-to-trigger (TTT) parameter, a filter coefficient, an event offset parameter, a cell individual offset (CIO) parameter, a reporting range parameter, a frequency offset parameter at the base station, and combinations thereof.

22. The apparatus of claim 17, further comprising:

a handover signaling data determining component to determine the handover signaling data at the base station based at least on one of a handover preparation procedure, a handover resource allocation procedure, a handover notification procedure, a path switch request procedure, a handover cancel procedure, a serial number (SN) status transfer procedure, and combinations thereof.

23. The apparatus of claim 17, further comprising:

a handover initiating component to initiate a handover from a first base station to a second base station, wherein the base station are different types of base stations or configured with different frequencies.

24. A non-transitory computer readable medium for hybrid management of handovers at a base station in a self organizing network (SON) comprising code that, when executed by a processor or processing system included within the UE, causes the UE to:

transmit, via a transmitting component at the base station, handover signaling data from the base station to a network entity, wherein the base station is one of a plurality of base stations transmitting handover signaling data to the network entity;

receive, at the base station, feedback associated with one or more handover parameters of the base station, wherein the feedback is received from the network entity and includes an indication on an amount of handover signaling data generated by the base station or the plurality of base stations; and

update the one or more handover parameters at the base station based on the feedback received and local information available at the base station.

25. The computer readable medium of claim 24, wherein the local information available at the base station is based on at least one of the amount of handover signaling data generated at the base station, a handover rate at the base station, a number of users served at the base station, a mobility performance of user equipments (UEs) served by the base station, radio link failures at the base station, velocity of UEs served by the base station, a transmit power of the base station, and combinations thereof.

26. The computer readable medium of claim 24, wherein receiving the feedback at the base station includes receiving an indication, from the network entity, on whether the base station is generating handover signaling data at a rate which is higher or lower than a first threshold value, wherein the first threshold value is calculated at the network entity based at least on a capacity of the network entity and a number of base stations in the SON.

27. The computer readable medium of claim 24, wherein receiving the feedback at the base station includes:

receiving an indication on whether the network entity is receiving handover signaling data at a rate which is higher or lower than a second threshold value, wherein the second threshold value is calculated at the network entity based at least on a capacity of the network entity.

28. The computer readable medium of claim 24, wherein the updating of the one or more handover parameters at the base station includes:

updating at least one of a hysteresis parameter, a time-to-trigger (TTT) parameter, a filter coefficient, an event offset parameter, a cell individual offset (CIO) parameter, a reporting range parameter, a frequency offset parameter at the base station, and combinations thereof.

29. The computer readable medium of claim 24, further comprising:

code for determining the handover signaling data at the base station based at least on one of a handover preparation procedure, a handover resource allocation procedure, a handover notification procedure, a path switch request procedure, a handover cancel procedure, a serial number (SN) status transfer procedure, and combinations thereof.

30. The computer readable medium of claim 24, further comprising:

code for initiating a handover from a first base station on a first layer to a second base station on a second layer to migrate a user equipment (UE) that is generating signaling at a rate higher than a third threshold value on the first layer, wherein the third threshold value is determined at the base station.