Bandwidth Estimation for Image Transmission During Handover
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Solution Overview
Problem
Existing wireless communication technologies face challenges in accurately estimating available bandwidth during communication path switching, leading to inefficient utilization of bandwidth due to significant changes in available bandwidth.
Innovation Solution
An image transmission apparatus and system that utilizes historical communication state information to estimate current available bandwidth, generates new communication state information upon path switching, and controls encoding parameters to adapt to the new bandwidth, ensuring efficient utilization.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If communication path switching occurs in heterogeneous wireless networks, then the range of usable communication paths expands, but the available bandwidth changes significantly, causing estimation inaccuracy
Solution Approach 1:
The system performs preliminary actions by acquiring temporary available bandwidth values and generating new communication state information corresponding to the new communication state before final bandwidth estimation. This preparation ensures that when handover occurs, the estimation can quickly adapt to the new bandwidth conditions without significant delay or inaccuracy.
Solution Approach 2:
The system dynamically adapts to changing communication conditions by replacing historical communication state information with new communication state information generated from temporary bandwidth values. This dynamic update mechanism allows the bandwidth estimation to follow the actual bandwidth changes during handover, maintaining accuracy despite significant bandwidth variations between different wireless access networks.
2Ease of operation
If existing bandwidth estimation methods are used during handover, then the system maintains simple estimation procedures, but the estimation accuracy decreases significantly due to bandwidth changes
Solution Approach 1:
The system acquires temporary available bandwidth values and generates new communication state information in advance during handover events. This preliminary action ensures that accurate bandwidth estimation can be maintained without significantly complicating the estimation procedure, as the system simply updates its state information based on the temporary values provided during handover.
3Device complexity
If historical communication state information is used for bandwidth estimation, then the estimation process is simple, but it becomes inaccurate when communication path switching occurs
Solution Approach 1:
The system dynamically replaces historical communication state information with new communication state information generated from temporary bandwidth values when handover occurs. This dynamic update mechanism maintains estimation accuracy during path switching while keeping the overall process relatively simple, as it only requires substituting the state information rather than fundamentally changing the estimation algorithm.
Data Source
AI summary
In order to enable efficient utilization of an available bandwidth by properly estimating the available bandwidth under conditions in which the available bandwidth significantly changes upon occurrence of communication path switching, an available bandwidth estimation is performed by estimating a current available bandwidth based on historical communication state information i.e. information on a past communication state stored in a storage to control a code amount used in encoding an image; upon occurrence of communication path switching (handover), acquiring a temporary available bandwidth value corresponding to a new (post-handover) communication path; generating new communication state information corresponding to a new communication state based on the temporary available bandwidth value; replacing the historical communication state information stored in the storage with the new communication state information; and estimating a new available bandwidth based on the new communication state information stored in the storage.