Wireless network multi-access point associated acknowledgement frame detecting method
A multi-access point, wireless network technology, applied in the field of wireless network access point association, can solve the problems of confirmation frame collision and transmission efficiency reduction, and achieve the effect of avoiding data frame retransmission
Active Publication Date: 2015-05-20
SHANGHAI JIAO TONG UNIV
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[0005] The purpose of the present invention is to overcome the deficiencies of the above-mentioned prior art, and propose a method for detecting confirmation frames associated with multiple access points in a wireless network, so as to solve the problem of confirmation frames sent by multiple access points when a client computer is associated with multiple access points. The problem of reduced transmission efficiency caused by frame collision
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[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings.
[0020] After the client computer sends the data frame, it switches the wireless network card to the receiving state. After a short inter-frame interval, if a decodable confirmation frame is received, it can be determined that the transmission of the data message is successful, which is consistent with the existing method. If the decoding is not successful, check whether there is a signal in the channel that meets the transmission time of the confirmation frame. If so, it is determined that the previous data frame has been successfully transmitted, so the data frame will not be retransmitted even though the confirmation frame has not been successfully decoded. A specific implementation is as follows:
[0021] In the open source wireless network card driver MadWifi, there is a register called radio frequency counter (RFCNT) to record the time when the wireless...
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The invention discloses a wireless network multi-access point associated acknowledgement frame detecting method. The method comprises the following steps of (1) after multi-access points successfully receive data frame, respectively transmitting acknowledgement frames; (2) when transmitting nodes receive the acknowledgement frames which can be decoded, judging that the data frame are successfully transmitted; when the acknowledgement frames which are not successfully decoded do not exist, detecting whether a signal in accordance with acknowledgement frame transmitting time exists in a channel or not, if the signal in accordance with the acknowledgement frame transmitting time exists in the channel, judging that the data frames are successfully transmitted, and if the signal in accordance with the acknowledgement frame transmitting time does not exist in the channel, transmitting the data frame again through the transmitting nodes. A plurality of acknowledgement frames collide at a client, the client can confirm the existence of the acknowledgement frames without correctly decoding the acknowledgement frames, so that unnecessary data frame retransmission can be avoided.
Description
technical field [0001] The invention relates to the technical field of wireless network access point association, in particular to a confirmation frame detection method for wireless network multi-access point association. Background technique [0002] By setting multiple wireless network access points (AP) to the same MAC address, IP address, ESSID and channel, the client can be associated with multiple access points at the same time, that is, multiple access points can receive its communication range at the same time Messages sent by internal clients. Under the condition of high packet loss rate or client mobile, this method of associating multiple access points can significantly improve the success rate of packet transmission, thereby improving the transmission performance of the wireless network. [0003] The IEEE (Institute of Electrical and Electronics Engineers) 802.11 standard stipulates that successful data message transmission includes at least two processes: messa...
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Inventor 王旭东吕品
Owner SHANGHAI JIAO TONG UNIV