Patent ID: 9445335
Filing Date: 2016-09-13
CPC Classification: H04J,H04W

Claim Text:
1. A method in an apparatus for adapting play out of data packets during a handover of a user equipment between a first radio network node and a second radio network node, which data packets relate to a real-time service application and which user equipment, first and second radio network nodes are comprised in a communications system, the method comprising: generating at least one message based on collected historical handover information and on current handover information, wherein the collected historical handover information relates to at least one handover previously performed between the first radio network node and the second radio network node by the user equipment, and wherein the current handover information relates to current radio control parameter settings for first radio network node and the second radio network node, wherein the generating the at least one message further comprises; generating a first primary message when a calculated probability D that a handover will occur between the first radio network node and the second radio network node passes a first threshold value, and wherein the first primary message comprises information that the handover will happen with the calculated probability p; and generating a second primary message comprising information about a handover that will happen when the user equipment knows that a handover is to happen; and adapting the play out of the data packets in dependence of the at least one message such that radio quality degradation in the real-time service application is controlled, wherein the play out of the data packets is adapted by increasing fill level of a jitter buffer in an event the calculated probability p for the handover is above a threshold and before a handover is performed when a number of the data packets relating to the real-time service application in the litter buffer is determined not to be sufficient to avoid buffer under-run during a handover outage.