Wireless communication system and method for adjusting use depth of buffering unit therein

Abstract

The invention discloses a wireless communication system and a method for adjusting use depth of a buffering unit in the same. The wireless communication system comprises a receiving unit, a buffer unit, a judging unit and an adjusting unit; the receiving unit is used for receiving a signal stream; the buffer unit is coupled to the receiving unit and used for storing the signal stream in a use depth; the judging unit is coupled to the receiving unit and used for judging the signal receiving quality of the signal stream received by the receiving unit and generating a judgment result; and the adjusting unit is coupled to the judging unit and used for adjusting the use depth of the buffer unit according to the judgment result.

Description

technical field [0001] The present invention relates to a wireless communication system, especially a method for adjusting a usage depth of a buffer unit in the wireless communication system and the related wireless communication system. Background technique [0002] Generally speaking, when transmitting multimedia packets such as video / voice over the network, a piece of data will be pre-downloaded into the buffer (Buffer) for buffering before playing. When the network is disturbed, the actual connection speed is lower than the playback consumption. When the data speed is used, the playback program will use the data in this small buffer to avoid playback interruption or interference, and the size of this buffer is mainly determined according to the delay that multimedia playback can tolerate, but , on the wireless network, the transmission situation changes greatly. For example, the short-distance transmission is fast, the long-distance transmission is slow, the transmission...

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Problems solved by technology

[0002] Generally speaking, when transmitting multimedia packets such as video / voice over the network, a piece of data will be pre-downloaded into the buffer (Buffer) for buffering before playing. When the network is disturbed, the actual connection speed is lower than the playback consumption. When the data speed is used, the playback program will use the data in this small buffer to avoid playback interruption or interference, and the size of this buffer is mainly determined according to the delay that multimedia playback can tolerate, but , on the wireless network, the transmission situation changes greatly. For example, the short-distance transmission is fast, the long-distance transmission is slow, the transmission is smooth when there is no interference, and the transmission is often interrupted when there is interference. Therefore, if a fixed-size buffer is used, when encountering When the channel quality is unstable, it is often impossible to receive video and voice smoothly. The known mechanism for dynamically adjusting the buffer is to estimate the delay of future packets by counting the delay of packets received in the past, and then based on this Adjust the buffer size (that is, the length of time to delay playback), however, in the case of momentary interference in the wireless network environment, this approach is slower to respond

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