Cross-layer method for reducing TCP repeated response under wireless local area network

Abstract

The invention discloses a cross-layer design method for reducing TCP repeated response under a wireless local area network. In the method, few frame formats and flow treatments only need to be rectified in the wireless local area network. A wireless access point (AP) caches the head local information of TCP / IP that is sent to a destination terminal by a sending terminal. A wireless terminal part caches a suggestion sending window of the TCP head at the MAC layer; simultaneously the sub-domain remained by the MAC head frame control domain marks whether the TCP layer carries out response and answering to the MAC layer within the specified time; and when the MAC layer is being sent, the MACACK is sent to the AP in a way of taking the slightly changed TCP suggestion window as the MAC load. After the AP receives the MAC ACK sent by the destination terminal, the TCP ACK agent destination terminal is established to carry out TCP response to the sending terminal according to the TCPACK response marking of the MAC head frame control domain and the previously cached TCP / IP head local information of the sending terminal.

Description

[0001] Technical field The method for reducing TCP repeated responses across layers in a wireless local area network belongs to the technical field of wireless communication networks Background technique [0002] Transmission Control Protocol (TCP) is an important transport layer protocol widely used on the Internet, which provides connection-oriented and reliable data flow services. It has become the de facto standard for ensuring transmission reliability on the Internet, and is used by almost all data communication applications that require reliability support. The reliability and stability of today's Internet are inseparable from the performance of the TCP protocol. [0003] With the popularity of wireless local area networks, a large amount of multimedia data is applied to wireless terminals, and among multimedia applications, TCP applications are the main ones. At present, the traditional TCP protocol is still used for reliable data transmission in wireless LANs, but tra...

AI Technical Summary

Problems solved by technology

This method has the following disadvantages: First, the MAC ACK payload transmitted by the wireless terminal to the AP carries the entire TCP header information (20 bytes), which takes up more storage resources of the wireless terminal and increases the length of the payload, wasting precious channels Second, when the AP sends a TCP ACK to the sender, it is sent in the normal TCP ACK mode, and there are many redundant information in the frame, which wastes system resources and processing time

However, this method can only calculate the congestion control information corresponding to the TCP data received by the sender. After the AP transmits the TCP data to the wireless terminal, the wireless terminal cannot actually receive the TCP data. The AP cannot pass it to the sender; and this method is only One way of thinking, it does not design a complete system specifically for specific wireless protocols, and lacks a certain degree of realizability

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