Data transmission method and apparatus
A data transmission method and a technology of a data transmission device, which are applied in the field of data transmission technology, can solve problems such as affecting downlink data transmission performance, large fluctuations, and poor user experience, so as to improve downlink data transmission performance, improve air interface utilization, and speed up The effect of sliding windows
Active Publication Date: 2008-12-31
HUAWEI TECH CO LTD
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Problems solved by technology
However, in the process of implementing the present invention, the inventors found that the methods of the prior art have at least the following problems: in the test of the live network, the rate of the downlink process of simultaneous uplink and downlink data transmission is low and the fluctuation is large. In the TCP layer, the ACK of the downlink data packet is usually arranged behind the uplink data packet, causing the ACK of the downlink data packet to be delayed, seriously affecting the performance of the downlink data transmission, and the user experience is poor
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[0023] An embodiment of the present invention provides a data transmission method. The data transmission process can be completed by a TCP function enhancement entity added on an intermediate node in the data transmission process between the sending end and the receiving end, such as a TCP proxy. like figure 1 As shown, the method may include:
[0024] S101, receiving the data packet sent by the sending end, and recording the information of the received data packet;
[0025] After receiving the data packets sent by the sender, record the serial numbers in sequence according to the order of the received data packets. The serial numbers can be incremented. The second packet is counted as 2...and so on. In order to avoid too many digits in the serial number, it can be added to a certain value and then re-numbered. For example, when the serial number reaches 65535, the serial number is re-numbered from 1, and this cycle repeats to meet the requirements of a large number of data ...
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The embodiment of the invention discloses a data transmitting method and a device, wherein, the data transmitting method mainly comprises the steps that: a data packet sent by a sending terminal is received and the information of the received data packet is recorded; the received data packet is sent to a receiving terminal through a certain protocol layer; after the protocol layer receives a data-packet confirmation message which is sent by the receiving terminal to a sending terminal, the information of the recorded data packet is searched according to the generated data-packet mapping relationship, wherein, the data-packet mapping relationship is a corresponding relationship between the recorded data packet and the data packet received by the protocol layer; according to the information of the searched data packet, an acknowledgement message ACK which is sent to the sending terminal is constructed. The method and the device provided by the embodiment of the invention initiatively construct the ACK and send the ACK to the sending terminal, thereby increasing the transmission speed of upstream and downstream simultaneous data transmissions.
Description
technical field [0001] The embodiment of the present invention relates to the field of mobile communication, especially to a data transmission technology. Background technique [0002] For packet PS services in the wireless field, the transmission control protocol TCP is generally used. In wireless networks, characteristics of wireless networks such as high latency, variable data rates, asymmetry, latency spikes, and bandwidth jitter all affect TCP performance. With the continuous development of the use of data services, the quality of service QoS required by users will also become higher and higher. How to improve the transmission performance of TCP in the wireless bearer is particularly important. [0003] For simultaneous uplink and downlink data transmission, the transmission process includes an upload process and a downlink process. In the uplink process, the terminal sends a data packet to the server. After receiving the server’s response message ACK packet, the term...
Claims
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IPC IPC(8): H04L1/16H04L47/2466
CPCH04L1/1607H04L1/1854H04L47/2466H04L2001/0097H04W80/06H04L69/163
Inventor 廖军华张岩强
Owner HUAWEI TECH CO LTD