ahmet toker | Süleyman Demirel Üniversitesi (original) (raw)
Papers by ahmet toker
We argue that the current Internet architecture is ill-suited for many emerging applications sinc... more We argue that the current Internet architecture is ill-suited for many emerging applications since they have requirements such as security, group communication, mobility, and quality of service (QoS) that were not considered in its original architectural design. We believe that the root of the current Internet's inability to accommodate requirements of emerging applications lies in the (mis)interpretation of the end-to-end arguments, a set of design principles for placement of function within a system, on which the Internet architecture was built. Further, we articulate a new interpretation of the end-to-end arguments and propose a new network architecture that allows semantic information to be communicated across protocol layers. We present a few service scenarios and demonstrate that the new network architecture can accommodate requirements of emerging applications. We reason about the necessary architectural components of such a network and discuss how they can be put together to create a unified framework that provides support for semantics- and context-aware applications.
The realization of a user-centric paradigm in future telecommunication networks, which implies fr... more The realization of a user-centric paradigm in future telecommunication networks, which implies free and automatic choice among different available wireless and mobile access networks, will revolutionize the Future Internet. For this innovative concept to materialize, a paradigm shift is required from contract-based mobile service delivery to an open, dynamic service delivery environment. This chapter presents an overview of the user-centric open networking paradigm for future telecommunications and a distributed Quality of Experience framework that enables user-centric, application-specific network selection and handover decisions on the user terminal. Furthermore, a formal modeling of cooperation and resource sharing among operators in this setting is provided, where the QoE framework also acts as an enabler for inter-operator mediation. Specifically, the QoE distribution component is demonstrated to make the truth revealing a dominant strategy for the operators. The interaction be...
IFIP Advances in Information and Communication Technology, 2010
We argue that the current Internet architecture is ill-suited for many emerging applications sinc... more We argue that the current Internet architecture is ill-suited for many emerging applications since they have requirements such as security, group communication, mobility, and quality of service (QoS) that were not considered in its original architectural design. We believe that the root of the current Internet's inability to accommodate requirements of emerging applications lies in the (mis)interpretation of the end-to-end arguments, a set of design principles for placement of function within a system, on which the Internet architecture was built. Further, we articulate a new interpretation of the end-to-end arguments and propose a new network architecture that allows semantic information to be communicated across protocol layers. We present a few service scenarios and demonstrate that the new network architecture can accommodate requirements of emerging applications. We reason about the necessary architectural components of such a network and discuss how they can be put together to create a unified framework that provides support for semantics- and context-aware applications.
2008 3rd International Conference on Communication Systems Software and Middleware and Workshops (COMSWARE '08), 2008
Communications in Computer and Information Science, 2010
2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications, 2007
The Internet, mobile telephony and portable computers let today's user meet novel applicatio... more The Internet, mobile telephony and portable computers let today's user meet novel applications provided by the service developers, who are motivated by the popular customer trends in technology. However, the supply-demand chain observed in telecommunications causes the complexity of both the user devices as well as the network to increase. The complexity is caused by the need to support quality of service, security and mobility for the new services throughout the heterogeneous communication network. These problems slow down the application development process significantly and cause the user demand not to be met in time. We believe that a new look at the network is necessary in order to address these issues. This article presents this new look, which we term network economy. It is a service-centric approach to next generation mobile networks, whereby the network is redefined as a collection of diverse resources. The aim of network economy is to optimise the allocation of these resources such that network efficiency is maximised. In order to achieve this objective, the intelligence level of the network is increased by decision engines, which continuously collect information from the network, classify and store it in a repository to be queried by their peers. The approach is accompanied by context-aware, self-organising user devices. Network economy provides a network-wide infrastructure to benefit users, service developers as well as network operators.
32nd IEEE Conference on Local Computer Networks (LCN 2007), 2007
ABSTRACT
2007 IEEE International Conference on Communications, 2007
Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 2012
2009 International Conference on Game Theory for Networks, 2009
Fixed Mobile Convergence Handbook, 2010
Telecommunication Systems, 2011
The increasing number of radio access technologies and the availability of multi-radio devices bo... more The increasing number of radio access technologies and the availability of multi-radio devices boost the need for novel resource allocation schemes in cellular networks. This paper uses a cooperative game theoretic approach for resource allocation at the network level, while utilizing simultaneous use of available radio interfaces at the device level. We model resource allocation management using the well known
ABSTRACT Traditional approaches to resource sharing make the assumption that the cooperating enti... more ABSTRACT Traditional approaches to resource sharing make the assumption that the cooperating entities are able to exchange performance related information. This is not a valid assumption if the entities belong to different operators. In such a scenario, cooperation decisions have to be taken under uncertainty. We present our dynamic inter operator resource sharing framework, in which we formulate the decision problem as a Partially Observable Markov Decision Problem(POMDP). We provide an exact solution POMDP and find the optimal borrowing threshold. We also propose a user-centric load measure that can be used independent of the underlying networking technology. We demonstrate our approach via a load balancing scenario for TCP traffic over 802.11g network.
We argue that the current Internet architecture is ill-suited for many emerging applications sinc... more We argue that the current Internet architecture is ill-suited for many emerging applications since they have requirements such as security, group communication, mobility, and quality of service (QoS) that were not considered in its original architectural design. We believe that the root of the current Internet's inability to accommodate requirements of emerging applications lies in the (mis)interpretation of the end-to-end arguments, a set of design principles for placement of function within a system, on which the Internet architecture was built. Further, we articulate a new interpretation of the end-to-end arguments and propose a new network architecture that allows semantic information to be communicated across protocol layers. We present a few service scenarios and demonstrate that the new network architecture can accommodate requirements of emerging applications. We reason about the necessary architectural components of such a network and discuss how they can be put together to create a unified framework that provides support for semantics- and context-aware applications.
The realization of a user-centric paradigm in future telecommunication networks, which implies fr... more The realization of a user-centric paradigm in future telecommunication networks, which implies free and automatic choice among different available wireless and mobile access networks, will revolutionize the Future Internet. For this innovative concept to materialize, a paradigm shift is required from contract-based mobile service delivery to an open, dynamic service delivery environment. This chapter presents an overview of the user-centric open networking paradigm for future telecommunications and a distributed Quality of Experience framework that enables user-centric, application-specific network selection and handover decisions on the user terminal. Furthermore, a formal modeling of cooperation and resource sharing among operators in this setting is provided, where the QoE framework also acts as an enabler for inter-operator mediation. Specifically, the QoE distribution component is demonstrated to make the truth revealing a dominant strategy for the operators. The interaction be...
IFIP Advances in Information and Communication Technology, 2010
We argue that the current Internet architecture is ill-suited for many emerging applications sinc... more We argue that the current Internet architecture is ill-suited for many emerging applications since they have requirements such as security, group communication, mobility, and quality of service (QoS) that were not considered in its original architectural design. We believe that the root of the current Internet's inability to accommodate requirements of emerging applications lies in the (mis)interpretation of the end-to-end arguments, a set of design principles for placement of function within a system, on which the Internet architecture was built. Further, we articulate a new interpretation of the end-to-end arguments and propose a new network architecture that allows semantic information to be communicated across protocol layers. We present a few service scenarios and demonstrate that the new network architecture can accommodate requirements of emerging applications. We reason about the necessary architectural components of such a network and discuss how they can be put together to create a unified framework that provides support for semantics- and context-aware applications.
2008 3rd International Conference on Communication Systems Software and Middleware and Workshops (COMSWARE '08), 2008
Communications in Computer and Information Science, 2010
2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications, 2007
The Internet, mobile telephony and portable computers let today's user meet novel applicatio... more The Internet, mobile telephony and portable computers let today's user meet novel applications provided by the service developers, who are motivated by the popular customer trends in technology. However, the supply-demand chain observed in telecommunications causes the complexity of both the user devices as well as the network to increase. The complexity is caused by the need to support quality of service, security and mobility for the new services throughout the heterogeneous communication network. These problems slow down the application development process significantly and cause the user demand not to be met in time. We believe that a new look at the network is necessary in order to address these issues. This article presents this new look, which we term network economy. It is a service-centric approach to next generation mobile networks, whereby the network is redefined as a collection of diverse resources. The aim of network economy is to optimise the allocation of these resources such that network efficiency is maximised. In order to achieve this objective, the intelligence level of the network is increased by decision engines, which continuously collect information from the network, classify and store it in a repository to be queried by their peers. The approach is accompanied by context-aware, self-organising user devices. Network economy provides a network-wide infrastructure to benefit users, service developers as well as network operators.
32nd IEEE Conference on Local Computer Networks (LCN 2007), 2007
ABSTRACT
2007 IEEE International Conference on Communications, 2007
Lecture Notes of the Institute for Computer Sciences, Social Informatics and Telecommunications Engineering, 2012
2009 International Conference on Game Theory for Networks, 2009
Fixed Mobile Convergence Handbook, 2010
Telecommunication Systems, 2011
The increasing number of radio access technologies and the availability of multi-radio devices bo... more The increasing number of radio access technologies and the availability of multi-radio devices boost the need for novel resource allocation schemes in cellular networks. This paper uses a cooperative game theoretic approach for resource allocation at the network level, while utilizing simultaneous use of available radio interfaces at the device level. We model resource allocation management using the well known
ABSTRACT Traditional approaches to resource sharing make the assumption that the cooperating enti... more ABSTRACT Traditional approaches to resource sharing make the assumption that the cooperating entities are able to exchange performance related information. This is not a valid assumption if the entities belong to different operators. In such a scenario, cooperation decisions have to be taken under uncertainty. We present our dynamic inter operator resource sharing framework, in which we formulate the decision problem as a Partially Observable Markov Decision Problem(POMDP). We provide an exact solution POMDP and find the optimal borrowing threshold. We also propose a user-centric load measure that can be used independent of the underlying networking technology. We demonstrate our approach via a load balancing scenario for TCP traffic over 802.11g network.