Paper Info
Title
Investigating the interacting two-way tcp connections over 3GPP LTE networks
Abstract
This paper investigates the interactions between two-way TCP connections over 3GPP LTE networks. In the LTE network, the two-way TCP flows share buffers on a common bottleneck, i.e., the radio access links. The behaviors of TCPs significantly influence the others in the opposite direction. Specifically, the radio links of LTE are asymmetric, which may induce drastic interactions of TCPs and rapid draining of downlink buffer. The periodic idleness of downlink is a huge waste of the precious radio bandwidth and results in considerable performance degradation. In the viewpoint of Coupled Queues, we thoroughly understand the interacting TCPs and explain the reason for performance degradation. Based on a straightforward modeling procedure, we formalize the evolution of two-way TCPs and model the bottleneck queue size in every slot. The model indicates the queues are close coupled, which is verified with simulations on NS2. If the uplink (queue) is fully utilized, the downlink (queue) will always be underutilized even idle, and vice versa. Furthermore, an effective solution called Preemptive ACK Queueing (PAQ) is designed to decouple the queues, which improves the performance of two-way TCPs over LTE networks.
Year
DOI
Venue
2012
10.1145/2387238.2387248
MSWiM
Keywords
Field
DocType
bottleneck queue size,considerable performance degradation,lte network,downlink buffer,two-way tcp,interacting tcps,two-way tcps,performance degradation,interacting two-way tcp connection,precious radio bandwidth,two-way tcp connection
Bottleneck,Radio access,Computer science,Queue,Computer network,Queueing theory,Bandwidth (signal processing),Telecommunications link,Distributed computing
Conference
Citations 
PageRank 
References 
3
0.51
9
Authors
5
Name
Order
Citations
PageRank
Yinsheng Xu1302.76
Fengyuan Ren293183.57
Shi-bo Xu3101.68
Chuang Lin43040390.74
Sajal K. Das58086745.54