Research Article
Client-Driven Joint Cache Management and Rate Adaptation for Dynamic Adaptive Streaming over HTTP
Table 1
Definition of the main symbols.
| | Predicted buffered media time |
| | at time instants | | Variation of predicted buffered media time | | Media bitrate | CS | Caching status | MSD | Predefined media segment duration | | Representation ID and segment number to identify a segment | | Time to cache a segment | | Time to receive a segment | | Time to request a segment | , | Upper threshold, lower threshold of predicted buffered media time | , | Upper threshold, lower threshold of variation of predicted buffered media time | , | Segment number, current segment number to be requested by client | SFT | Segment fetch time | | Estimated SFT for a subsequent segment | | SFT measured by client | | SFT measured by proxy cache | | SFT measurement from proxy cache to client | | SFT measurement from the origin server to proxy cache | | The recent sample of | | The recent sample of | | Proxy cache to the client | | Origin sever to the proxy cache | , | Representation ID, The current representation ID, the previous representation ID | , , and , | Window size of the subsequent, prefetching and previous segments | | Window size of the representation ID |
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