Beam selection based on UE position measurements
The invention refers to a method for performing a handover of a user equipment, UE ( 10 ), from one or a plurality of source beams of a source access node, AN ( 14 ) to one or a plurality of target beams of a target access node, AN ( 16 ), wherein the target AN performs the steps of receiving from the source AN ( 14 ) a positioning information indicative of a first position estimate of an actual position of the UE ( 10 ), determining or initiating determining a resulting position estimate, wherein the resulting position estimate is derived from the first position estimate, and activating the one or the plurality of target beams in dependency of the resulting position estimate. The invention further refers to a method wherein the target AN ( 16 ) performs the steps of receiving from the source AN the positioning information indicative of a first position estimate, determining or initiating determining a second position estimate associated to the an actual position of the UE ( 10 ), determining or initiating determining a delta position between the first position estimate and the second position estimate, and storing or initiating storing the delta position. The invention further refers to a method wherein the source AN ( 14 ) performs the steps of determining or initiating determining a first position estimate of an actual position of the UE ( 10 ), and sending to the target AN ( 16 ) an information indicative of the first position estimate of an actual position of the UE ( 10 ). The invention further refers to corresponding access nodes ( 14, 16 ) and a software program.
1. A method for performing a handover of a User Equipment (UE) from one or a plurality of source beams of a source Access Node (AN) to one or a plurality of target beams of a target AN, the method comprising the target AN:
receiving, from the source AN, positioning information indicative of a first position estimate of an actual position of the UE;
determining or initiating determining a resulting position estimate, wherein the resulting position estimate is derived from the first position estimate, wherein the resulting position estimate is a function of the first position estimate and a delta position associated to the first position estimate;
activating the one or the plurality of target beams based on the resulting position estimate,
wherein the delta position is determined based on pruning of a plurality of determined position difference values from a database that keeps the stored plurality of determined position difference values.
2. The method of claim 1 , wherein the delta position estimate is retrieved from the database that keeps stored a delta position associated with the first position estimate.
3. The method of claim 1 , wherein the function comprises calculating an average of a plurality of preceding delta positions.
4. A method of supporting a handover of a User Equipment (UE) from one or a plurality of source beams of a source Access Node (AN) to one or a plurality of target beams of a target AN, the method comprising the target AN:
receiving, from the source AN, positioning information indicative of a first position estimate associated to an actual position of the UE;
determining or initiating determining a second position estimate associated with the actual position of the UE, wherein the second position estimate is a function of the first position estimate and a delta position associated to the first position estimate; and
determining or initiating determining a delta position between the first position estimate and the second position estimate,
wherein the delta position is determined based on pruning of a plurality of determined position difference values from a database that keeps the stored plurality of determined position difference values; and
storing or initiating storing the delta position.
5. The method of claim 4 , further comprising:
determining, after a subsequent handover, a subsequent delta position;
determining or initiating determining a refined delta position as a function of the stored delta position and the subsequent delta position; and
storing or initiating storing the refined delta position as delta position.
6. A method for performing a handover of a User Equipment (UE) from one or a plurality of source beams of a source Access Node (AN) to one or a plurality of target beams of a target AN, the method comprising the source AN:
determining or initiating determining a first position estimate of an actual position of the UE, wherein a resulting position estimate is a function of the first position estimate and a delta position associated to the first position estimate; and
sending, to the target AN, information indicative of the first position estimate of an actual position of the UE, so that the target AN is enabled to activate the one or the plurality of target beams based on the first position estimate,
wherein the delta position is determined based on pruning of a plurality of determined position difference values from a database that keeps the stored plurality of determined position difference values.
7. The method of claim 6 , wherein the sending, to the target AN, the information indicative of the first position estimate is performed after detecting that a handover shall be performed from one or a plurality of source beams of the source AN to one or a plurality of target beams of the target AN.
8. An access node of a radio network adapted for communicating with a User Equipment (UE) over a radio interface, the access node comprising:
a receiver configured to receive, from a further access node, positioning information indicative of a first position estimate of an actual position of the UE;
processing circuitry configured to:
determine a resulting position estimate, wherein the resulting position estimate is derived from the first position estimate, wherein the processing circuitry is further configured to retrieve a delta position from a database that keeps stored a plurality of delta position information, each being associated with first position estimate; and
activate one or a plurality of target beams based on the resulting position estimate,
wherein the delta position is based on pruning of a plurality of determined position difference values from a database that keeps the stored plurality of determined position difference values.
9. An Access Node (AN) of a radio network adapted for communicating with a User Equipment (UE) over a radio interface, the AN comprising:
a receiver configured to receive, from a source AN, positioning information indicative of a first position estimate associated to an actual position of the UE;
processing circuitry configured to:
determine a second position estimate associated to the actual position of the UE; and
determine a delta position between the first position estimate and the second position estimate, wherein the processing circuitry is further configured to retrieve the delta position from a database that keeps stored a delta position associated with each first position estimate,
wherein the delta position is determined based on pruning of a plurality of determined position difference values from a database that keeps the stored plurality of determined position difference values.
10. An Access Node (AN) of a radio network adapted for communicating with a User Equipment (UE) over a radio interface, the AN comprising:
processing circuitry configured to:
determine a first position estimate of an actual position of the UE;
determine a second position estimate the actual position of the UE;
determine a delta position between the first position estimate and the second position estimate,
wherein the processing circuitry is further configured to retrieve the delta position from a database that keeps stored a delta position associated with each first position estimate, and
wherein the delta position is determined based on pruning of a plurality of determined position difference values from a database that keeps the stored plurality of determined position difference values; and
transmission circuitry configured to send, to a target AN, information indicative of the first position estimate of an actual position of the UE and information indicative of the second position estimate of an actual position of the UE, so that the target AN is enabled to activating one or a plurality of target beams in dependency of the first position estimate.