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Traffic generation represents one of the main challenge in modeling and simulating the application and network load. In this work, we present a tool, called OpenAirInterface Traffic Generator (OTG), for the generation of realistic application traffic that can be used for testing and evaluating the performance of emerging networking architectures. In addition to the traffic of conventional applications,...
Handover efficiency in wireless packet switched networks is very crucial in providing QoS guarantees to real time applications. Mobile IPv6 (MIPv6) is a prevalent choice for mobility management in future generations networks. Although MIPv6 benefited from the design knowledge of its predecessor i.e. MIPv4 and is more efficient, it still suffers from high handover delays. The main reason for MIPv6...
In view of the development of the Push to talk over Cellular (PoC), this paper proposes two different network schemes, and every network unit function is introduced. Then the communication performance is simulated about the two schemes. Lastly, the communications of the PoC service based on TD-SCDMA network is simulated by computer. By simulation we know it is able to realize the PoC service based...
In this paper, a delay tolerant approach for traffic management in LTE over satellite link is presented. Due to the long propagation delays and frequent disruptions, mobile satellite communications pose many challenges, especially to the transport layer when the TCP protocol is used. We design and evaluate the performance of a transport protocol solution based on the DTN architecture in the satellite-LTE...
Infrastructure networks like Internet have some coverage gaps (e.g. rural areas) where no service connectivity is provided. Cellular networks could be used in alternative but they usually associate their services with a usage cost. Nowadays, the growing number of mobile devices equipped with a wireless interface and the end-user trend to shift toward wireless technology has opened new possibilities...
The paper is about mobile Stream Control Transmission Protocol (mSCTP) and the problems related to simultaneous mobility. Simultaneous mobility is when the both endpoints of a communication session are mobile and they move at about the same time. mSCTP works well in the case of non-simultaneous mobility where the SCTP association is established between a mobile endpoint and a stationary one. In the...
There is an increasing trend of accessing multimedia and web services embedded with Presence service over the mobile, which have driven the telecom operators to look for the new and better ways to provide such services. Presence service puts a lot of load on the IMS network and it can contribute 50% or more to the total signaling load which can increase end-to-end delay. In this paper we have analyzed...
In this paper, the delay time of streaming packets was compared with the delay time of 1500 byte test packets during IP handover between heterogeneous networks, and the deployment of equipment and network for this experiment was performed through the BcN 3rd phase project, which was hosted by KCC(Korea Communications Commission), and conducted by NIA(National Information Society Agency) from 2008...
Recently, femtocells, which cover a cell area of several tens of meters, have been attracting considerable attention in the field of mobile data communications. In the standard method, when a femtocell for data communication is connected through a public network such as a broadband access network or the Internet, an IPSec tunnel is established between the femtocell and the security gateway located...
During interdomain handover, IPv6 node has to acquire new address at its new location. Once the L2 handover procedure is completed, mobile node (MN) starts its IPv6 configuration, using stateless (router advertisements) or stateful (DHCPv6 communication) mode. After the address is obtained, its uniqueness has to be verified, using Duplicate Address Detection (DAD) procedure. Depending on the interface...
Application Layer Multicast (ALM) has become a popular form of content distribution. It shows some favourable properties like inherent scalability and the overcoming of the traditional client-server bottleneck. In the future, a large fraction of the participants in ALM systems will be mobile (eg. smart-phones or netbooks) and demand for a proper inclusion and mobility handling. After analyzing current...
During interdomain handover, IPv6 node requires a new address at its new location. Once the L2 handover procedure is completed, the mobile node (MN) starts its IPv6 configuration process, using stateless (router advertisements) or stateful (DHCPv6) mode. When so-called care-of address (CoA) is assigned, its uniqueness has to be verified, using Duplicate Address Detection (DAD) procedure. Depending...
In this paper we propose a generic architecture for a small powerful mobile computer that relies on network and its servers for majority of its activities. Since the network is located in middle of this architecture, we discuss the feasibility and capacity of using the network as a temporary dynamic storage in the form of cache for limited and frequently used data/control data. However the node delivery...
A scalable framework for mobile real-time group communication services is developed in this paper. Examples for possible applications of this framework are mobile social networks, mobile conference calls, mobile instant messaging services, and mobile multi-player on-line games. A key requirement for enabling a real-time group communication service is the tight constraint imposed on the call delivery...
IETF (Internet Engineering Task Force) has proposed a PMIPv6 (Proxy Mobile IPv6) to make up for the weak points caused by handoff delay and signaling overhead. The handoff delay and signaling overhead occur due to frequent binding updates during handoff in the MIPv6 (Mobile IPv6). Although the handoff in the PMIPv6 can be faster than that in the MIPv6, there still exists the handoff delay and packet...
Because of its salient features such as ease of deployment, Proxy Mobile IPv6 (PMIPv6) is a promising solution for mobility management and is attracting considerable attention among the telecommunication and Internet communities. To the best of our knowledge, however, it is still an open issue how to build a scalable PMIPv6 domain so that a PMIPv6 domain is able to support as many mobile nodes (MNs)...
Secure multicast over wireless networks is an important and challenging goal because of widespread deployment of wireless networks and the need of multicast. In this paper, we propose a new method to generate and distribute keys for multicast security function. In existing key management protocols, after join or leave a node, key regeneration and distribution is needed to provide multicast security...
The Application continuity in IMS requires Mobility Management to ensure Session having Seamless handover and small delay. As a Session Control Protocol of IMS, SIP introduces big delay and real-time handover problems. In this letter, we proposed a combination scheme of SIP and mSCTP to solve the problem of Application continuity in IMS. We presented a novel approach for the problem of Compatibility...
In this paper, we present the design and the implementation of a test-bed for the Policy and Charging Control (PCC) system proposed in 3GPP TS23.203. Specifically, we use an IP multimedia call service example to demonstrate how to implement an advanced mobile service with policy and charging control in our test-bed. We show that the PCC system can handle the application-level session information and...
Recently, small base stations such as femtocell and picocell are drawing attention as new components of wireless access networks. These small base stations are used not only to expand the wireless area within a large building, but also to increase bandwidth capacity and reduce the load on the core network. If multiple femtocells are deployed in an office building to expand the communication area,...
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