Research on the Extension of SCTP Protocol on the Heterogeneous Wireless Network

Research on the Extension of SCTP Protocol on the Heterogeneous Wireless Network

Yao Yuan (Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China), Dalin Zhang (Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China), Lin Tian (Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China) and Jinglin Shi (Institute of Computing Technology, Chinese Academy of Sciences, Beijing, China)
DOI: 10.4018/IJITN.2016040107
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Abstract

As a promising candidate of general-purpose transport layer protocol, the Stream Control Transmission Protocol (SCTP) has its new features such as multi-homing and multi-streaming. SCTP association can make concurrent multi-path transfer an appealing candidate to satisfy the ever increasing user demands for bandwidth by using Multi-homing feature. And multiple streams provide an aggregation mechanism to accommodate heterogeneous objects, which belong to the same application but may require different QoS from the network. In this paper, the authors introduce WM2-SCTP (Wireless Multi-path Multi-flow - Stream Control Transmission Protocol), a transport layer solution for concurrent multi-path transfer with parallel sub-flows. WM2-SCTP aims at exploiting SCTP's multi-homing and multi-streaming capability by grouping SCTP streams into sub-flows based on their required QoS and selecting best paths for each sub-flow to improve data transfer rates. The results show that under different scenarios WM2-SCTP is able to support QoS among the SCTP stream, and it achieves a better throughput.
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1. Introduction

Recently, with the rapid development of wireless communication technology (Zhou, Wang, J., Ng, Higuchi, & Sawahashi, 2008) and the increasing demand of mobile access, the wireless communication network related industry is rapidly growing. Also the feature recognition of the next generation mobile communication network (4G) is gradually tend to uniform (Yabusaki, Okagawa, & Imai, 2005): 4G network is a multiple access methods based on the IP system architecture of the network, the network will merge different wireless access technology advantage, and have the IP network inherent characteristics such as simplicity, flexibility and robustness. The characteristics of the future 4G is the integration of network multiple access technology, a lot of supporting multiple access technology of multi-mode terminals are into the commercial stage, such as multimode mobile phone, multimode PDA, multimode notebooks, etc.; In addition, NEMO (Network Mobility Support) (Nguyen, & Bonnet, 2008) puts forward to support multiple access technology of wireless router equipment, used in transport and other means of transport, in order to meet the mobility requirements and the communication service quality requirements of a large number of car users. At the meanwhile, compared with the existing communication system, 4G system will support more diversified business, and will become more and more complex in the form of the business. For the voice, video and other multimedia real-time services, which are very sensitive to delay and jitter, they have high quality requirements of service; and often there exist multiple QoS parameters data stream in one application. Therefore, how to make full use of the characteristics of multiple access technology of 4G network, to provide end-to-end high quality service for users (Tian, Zhou, Zhang, Sun, & Shi, 2012) to improve the experience quality of various business for users, becomes a problem to be solved.

SCTP (Stream Control Transmission Protocol) is a new generation of general IP transport Protocol, has been standardized by IETF RFC2960 (Stewart, Xie, Morneault, Sharp, Schwarzbauer, Taylor, & Rytina, 2000), and been extended in RFC4960.Two main extension of TCP and UDP by SCTP are supporting multi-homing and supporting multi-flow in one single SCTP association. Because of SCTP protocol has the characteristics of multi-home, which can make multi-path transmission in a heterogeneous network environment by using SCTP protocol, is becoming one research hotspot of heterogeneous network transport layer solutions. However, the existing scheme is difficult to meet the high reliability, low latency and end-to-end QoS guarantee requirements of the future network; its outstanding problem is that haven’t taken into account the difference the link of the path under the multi-path transmission, the difference has caused the QoS guarantee problem of different service flow and a lot of disorder and receiving end data cache problem, has great influenced the system throughput and the user experience quality.

In recent years, domestic and foreign experts have carried on a series of extension research on the traditional SCTP protocol to make it suitable for the heterogeneous wireless network environment, and have proposed the corresponding solutions (Eddy, 2004; Zou, Uyar, Fecko, & Samtani, 2006), these solutions partially solved the problems of traditional SCTP protocol, but there are still some serious flaws.

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