Handover robustness in cellular radio communications

摘要

An indication of the speed of movement of a UE in a radio communications system is received (801) at a network node of the radio communications system. The parameters of the radio communications system are then analyzed (803) using the speed of movement indication. The system parameters are then adjusted (805) using the analysis.

主权项

1. A method implemented in a network node of a cellular radio communications system to improve system functionality using speed information regarding a user equipment (UE), the method comprising:
receiving an indication of a speed of movement of the UE, wherein receiving an indication comprises receiving a report, from another network node indicating a signal strength measured by the UE during an attempted handover from the network node to the other cell, and a time elapsed between a connection request by the UE and a failure of the connection together with the indication of a speed of movement of the UE; analyzing system parameters using the speed of movement indication, wherein the system parameters comprise mobility thresholds for the UE and wherein analyzing comprises analyzing the handover report to determine whether the handover failure is due to UE speed of movement; adjusting the system parameters using the analysis, wherein adjusting comprises adjusting mobility thresholds for the UE with respect to neighbor cells; and wherein the system parameters include a list of candidate UEs to move from the network node to another network node as a load balancing move, wherein receiving an indication of speed comprises receiving speed information regarding speed of movement of a move candidate UE, and wherein the method further comprises, selecting move candidate UEs;
determining whether a selected move candidate UE is a high mobility UE using the received speed information; andexcluding the selected move candidate UE from a load balancing move if the selected move candidate UE is determined to be a high mobility UE.