US 2018/0124355 A1 · METHOD AND SYSTEM FOR IMPROVING VIDEO QUALITY DURING CALL HANDOVER

Abstract

A user equipment (UE) and method of improving video call quality during handover are generally described. After determining that handover has started (306), the UE may suspend (308) frame transmission and store the frames. After determining that handover has completed (310), the UE may discard (312) frames whose age exceeds a predetermined percent of a latency deviation computed from a real-time transport control protocol report. The UE may determine whether transmission of the remaining frames would exceed a delay proportional to a video frame interval multiplied by an uplink bandwidth for a cell to which the UE is connected or a maximum bitrate of a guaranteed bitrate bearer multiplied by a typical period for a non-access stratum bandwidth and discard frames in order of decreasing age until neither the bitrate nor the delay is exceeded by the transmission.

Claims27

Dependent claims

An apparatus configured to control transmission of video data, the apparatus comprising:

a processing component and a memory component, the apparatus configured to:
in response to identifying a start of a handover event, suspend transmission of the video data and store a first set of the video data in the memory component;
in response to detecting completion of the handover event, configure the memory component to remove some of the video data in the first set of stored video data to obtain a second set of stored video data by removing at least one of:
video data with pending transmission time that exceeds a threshold pending transmission time, or
video data with its transmission that exceeds at least one of a threshold bitrate or threshold delay;
and
transmit the second set of video data.

4 more elements

A computer readable storage medium including instructions that, when executed by hardware processing circuitry of an apparatus, cause the apparatus to:

store a first set of video data of a video call during handover;
determine, after handover has completed, a set of the stored video data having a predetermined set of characteristics determined contemporaneously with completion of handover;
discard the set of the stored video data, leaving a second set of video data;
and
transmit the second set of video data,
wherein the predetermined set of characteristics includes pending transmission time over a predetermined percent of a latency deviation computed from a real-time transport control protocol report and aggregated size of the remaining video data over a predetermined size.

3 more elements

Dependencies are inferred from the claim text.

Method and system for improving video quality during call handover

Life of this patent

Method and system for improving video quality during call handover

Life of this patent

Abstract

Claims27