Performance evaluation of a TCP proxy in WCDMA networks

Meyer, Max; Sachs, Joachim; Holzke, M.

doi:10.1109/mwc.2003.1241104

Cited by 32 publications

(37 citation statements)

References 6 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Lately several studies investigate the potential benefits of using the split TCP concept in wireless [27,13,22] and in particular in cellular networks [14]. The authors in [19] give a comprehensive overview of split connection TCP proxies in Wideband Code Division Multiple Access networks and show that this solution can significantly improve the throughput of file downloads, while in [21] the performance (e.g., throughput, page download time) of Hypertext Transfer Protocol (HTTP) proxy and TCP proxy solutions is compared. In [7] a TCP proxy with flow aggregation capability is investigated applied in order to enhance the user experience in case of General Packet Radio Service data calls.…”

Section: Related Workmentioning

confidence: 99%

A Split Connection TCP Proxy in LTE Networks

Farkas

Héder

Nováczki

2012

Information and Communication Technologies

View full text Add to dashboard Cite

Abstract. High quality and ubiquitous Internet access is a key feature of today's mobile systems such as LTE. While LTE can provide competitive peak data rates and a relatively low latency, there is still room for solutions improving end-users' Quality-of-Experience by optimizing services running over the LTE infrastructure. Being the most widespread transport protocol, TCP is in the main focus of such research projects. A widely recommended solution for TCP performance improvement is the split connection TCP proxy that divides the end-to-end TCP connection into two independent connections, that results increased throughput and faster error recovery. This paper investigates the performance of a split connection TCP proxy deployed in LTE's SAE-GW. Numerical results show significant performance improvement of file downloading, web browsing and video steaming applications in case of not congested transport networks.

show abstract

Section: Related Workmentioning

confidence: 99%

A Split Connection TCP Proxy in LTE Networks

Farkas

Héder

Nováczki

2012

Information and Communication Technologies

View full text Add to dashboard Cite

show abstract

“…The wired network comprises the Internet and the 3G core network. The radio bearer has a round trip time (RTT w ) of 50 ms [2,8] and a bidirectional nominal rate ranging from 384 kbit/s to 64 kbit/s, representing the bottleneck link, which is the situation expected in most cases [11]. The wired (fixed) network is modeled with a 1 Mb/s link with a round trip delay (RTT f ) of 200 ms [2].…”

Section: Simulation Environmentmentioning

confidence: 99%

“…The radio bearer has a round trip time (RTT w ) of 50 ms [2,8] and a bidirectional nominal rate ranging from 384 kbit/s to 64 kbit/s, representing the bottleneck link, which is the situation expected in most cases [11]. The wired (fixed) network is modeled with a 1 Mb/s link with a round trip delay (RTT f ) of 200 ms [2]. The wireless channel generates error bursts according to the model described in [13] where the Doppler frequency, f d , of the UE determines the average burst length.…”

Section: Simulation Environmentmentioning

confidence: 99%

“…In 3G radio access networks, the link layer is managed by the Radio Link Control (RLC) protocol [1] which can be configured to provide a reliable service, recovering from propagation errors. A reliable RLC layer reduces packet losses perceived at TCP layer, avoiding the triggering of unnecessary congestion control measures [2,3]. However, several characteristics of 3G links like high and variable latency and buffer overflow of the downlink buffers [4,5,6], have undesired effects on TCP performance.…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Performance Evaluation of AQM Schemes in Rate-Varying 3G Links

Alcaraz

Cerdan

2006

Personal Wireless Communications

View full text Add to dashboard Cite

Abstract. When TCP is carried over 3G links, overbuffering and buffer overflow at the RLC layer degrades its performance. AQM techniques at the RLC buffer can bring noticeable enhancements to TCP performance without introducing changes in 3G specifications. We show that the optimum parameter setting of AQM algorithms in RLC buffers is strongly related to the radio bearer rate, which can be changed dynamically by control layer protocols. By means of extensive simulation experiments we propose, for each specified nominal rate, optimum configurations that keep the goodput near the maximum while the delay is reduced up to 50%. We consider two AQM schemes, an adapted RED algorithm and a novel deterministic one, SBD described in this paper. We illustrate how an automatic reconfiguration of AQM parameters avoids the degradation caused by sudden changes in the radio bearer rate.

show abstract

“…Thus, an error model based on uniform distribution of transport block errors, was used in the simulation. It is valid to assume Proceedings of the First International Conference on Wireless Internet (WICON'05) that the erroneous transport blocks perceived by the RLC is independent and uniformly distributed as a result of interleaving, forward error-correction and fast power control mechanisms provided by the PHY layer [12]. The TBLER, in the range from 0 to 50%, was considered in the simulation.…”

Section: Phy Modelmentioning

confidence: 99%