Flow control method and system for data transmission in acknowledgement mode

Abstract

The present invention discloses a flow control method of data transmission with a confirmed mode. An up storing threshold Upthres and a down storing threshold Dnthres are set in the invention. When the storing space taken by the back module is larger than Upthres, the back module enters a suspension state. The back module returns to the normal state along with the receiving of confirmation information from the network side by the back module and causing the taken storing space is smaller than Dnthres. In the invention, the back module dynamically adjusts the Upthres and Dnthres according to the time number of entering into the suspension state and the time number of entering the normal state of the back module. Furthermore the back module dynamically adjusts the Upthres and Dnthres according to the time from entering into the suspension state to returning to the normal state of the back module. The invention also discloses a flow control system of data transmission. The method and thesystem according to the invention can save system resource and increase the data transmission efficiency.

Description

technical field [0001] The invention relates to flow control technology, in particular to a flow control method and system for data transmission in confirmation mode. Background technique [0002] In a mobile communication system, terminals such as mobile phones are composed of multiple modules with different characteristics. In order to realize data transmission between terminals such as mobile phones and the network side, front-end modules and back-end modules of the terminal are required. Specifically, when performing data transmission in confirmation mode, the front-end module first submits the data packet to be sent to the back-end module, and the back-end module saves the data packet and transmits the data packet to the network side. After the data packet is successfully transmitted, the subsequent The end module will receive confirmation from the network side, and then delete the saved related data packets according to the confirmation. For the mobile terminal of the...

AI Technical Summary

Problems solved by technology

[0006] Although the existing flow control method can solve the problem of easy exhaustion of storage space to a certain extent, the selection of Upthres and Dnthres is relatively difficult. If the Upthres is set too high, the storage space needs to occupy more resources of SNDCP, so It will waste resources that SNDCP itself is not rich in; if Upthres is set too low, SNDCP will frequently reach Upthres in normal state, so SNDCP will frequently send Suspend messages to the application layer, wasting system resources; if Dnthres is set too high, When SNDCP is in the suspended state, it will frequently reach Dnthres, wasting system resources; if the Dnthres setting is too low, SNDCP will remain in the suspended state for too long, affecting data transmission efficiency

Moreover, a pair of fixed Upthres and Dnthres cannot adapt to all situations in the data transmission process, and the flexibility is poor

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