Token based method and system for transmission control
A transmission control and token technology, applied in the field of communication, can solve the problems of longer stream sending time, bandwidth waste, delayed stream completion time, etc., achieve high throughput, avoid waste, and achieve fast responsiveness
Active Publication Date: 2015-08-26
TSINGHUA UNIV
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Problems solved by technology
The occurrence of congestion causes increased stream completion times due to increased queuing delays and even TCP timeouts
The ON / OFF traffic mode will cause the stream to send data intermittently while maintaining the connection, resulting in a waste of bandwidth, making the stream sending time longer, and delaying the stream completion time
Method used
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[0031] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.
[0032] figure 1 It is a flowchart of a token-based transmission control method according to an embodiment of the present invention; refer to figure 1 , the method includes:
[0033] S101: Obtain the total number of tokens in the current allocation period, and obtain the equivalent number of activation flows in the current allocation period according to the received data;
[0034] Wherein, the total number of tokens is the amount of data that can be transmitted by the link, which can be obtained by calculating c×t, where c is the maximum bandwidth of the link, and t is the length of the current allocation cycle.
[0035] The number of equivalent activation streams is the...
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The invention discloses a token based method and a system for transmission control, and relates to the technical field of communication. The method comprises the steps of acquiring the total number of tokens in the current distribution cycle, and acquiring the number of equivalent activation flows in the current distribution cycle according to received data; calculating the size of a first congestion window according to the total number of the tokens and the number of the equivalent activation flows; and sending the size of the first congestion window to a sending end so as to enable the sending end to send data according to the size of the first congestion window in the next distribution cycle. According to the invention, the size of the first congestion window is calculated and sent to the sending end so as to enable the sending end to send data according to the size of the first congestion window in the next distribution cycle, thereby ensuring high throughput, and avoiding waste of the throughput. In addition, the size of the first congestion window can be acquired quickly in each distribution cycle, quick responsiveness is realized, and thus flow optimization can be completed quickly.
Description
technical field [0001] The invention relates to the field of communication technology, in particular to a token-based transmission control method and system. Background technique [0002] In modern data centers, the need to optimize flow completion times is ever more pressing. For example, compared to offline parallel computing systems like Mapreduce, stream computing systems like Storm carry more and more online data processing services, and they are more sensitive to the average and tailing stream completion times, because This directly determines their service quality. [0003] However, special traffic characteristics in the data center, such as short flow bursts, high concurrency, and ON / OFF traffic patterns, often cause the increase and tailing of flow completion time. Short flow bursts can easily cause severe congestion and packet loss, leading to tailing flow completion times. Many data center transmission protocols cannot well alleviate congestion under high concu...
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IPC IPC(8): H04L12/807H04L47/27
Inventor 任丰原程鹏张娇舒然
Owner TSINGHUA UNIV