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Data transmission method and device

A data transmission method and data frame technology, applied in digital transmission systems, transmission systems, error prevention/detection using return channels, etc., can solve problems such as reducing channel transmission efficiency, and achieve the effect of saving time and resources

Active Publication Date: 2017-03-29
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, according to the CSMA / CA policy, if S 2 listening to S 1 When sending data, a backoff strategy will be adopted, waiting for S 1 It can only be sent after the sending is completed, which reduces the transmission efficiency of the channel

Method used

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  • Data transmission method and device

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Embodiment Construction

[0036] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.

[0037] Before introducing the embodiment of the present application in detail, some technical details of the embodiment are introduced first. figure 2 The layered structure of the OSI model is shown. The OSI model includes physical layer, data link layer, network layer, transport layer, session layer, presentation layer and application layer.

[00...

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Abstract

The invention discloses a data transmission method and device and is used for improving transmission efficiency of a wireless network. The method comprises the steps that a sending end sends a data frame to a receiving end; and the sending end judges whether the receiving end receives the data frame or not, if the receiving end does not receive the data frame, the sending end continues to send the data frame to the receiving end according to a preset time interval. Through application of the data transmission method and device provided by the invention, when the sending end sends the data frame to the receiving end, a capture effect can be formed at the receiving end, so the data frame is received by the receiving end successfully. When the sending end sends the data frame to the receiving end, the data frame is sent without carrier monitoring, so time and resources consumed for the carrier monitoring are reduced, and the problem that in the prior art, the transmission efficiency of the wireless network is reduced due to backoff waiting when transmission of other data frames is monitored in a channel is avoided.

Description

technical field [0001] The present application relates to the field of wireless network communication, in particular to a data transmission method and device. Background technique [0002] With the rapid growth of the number of wireless devices (such as mobile phones, laptops, tablets, Bluetooth devices, smart watches, wireless sensors, etc.) Concurrent transmissions by multiple wireless devices are almost ubiquitous. In the case of concurrent transmission, due to limited spectrum resources, concurrent transmission in the same or similar frequency band may cause channel competition, so that the receiving end cannot receive data normally. [0003] In order to enable the receiving end to receive data normally, the existing strategies based on Carrier Sense Multiple Access / Collision Avoidance (CSMA / CA) are mainly used, that is, when a wireless device sends data, it first detects whether there are other wireless devices in the channel The channel is being occupied, the method ...

Claims

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Application Information

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IPC IPC(8): H04L1/18
CPCH04L1/1803H04L1/188
Inventor 曹志超王继良刘云浩
Owner TSINGHUA UNIV
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