Service level negotiation in ubiquitous environments

Abstract

The goal of the ubiquitous connectivity is to enable mobile users to be permanently and transparently connected to the Internet, with the desired quality of service. In such an environment, it becomes very difficult for service providers to satisfy the needs of users. A solution is to assign a profile to each user in order to optimize and automate the dynamic service level negotiation. These mobile users are often connected to wireless networks and consuming services that require quality ofservice guarantees such as video on demand or voice over IP. Hence, in ubiquitous environments, we need to guarantee both quality of service and security for mobile users communications. In this paper, we present a protocol for service level negotiation which uses Web Services and includes both quality of service and security in its negotiation. Then, we propose to adapt this protocol, called SLNP, to ubiquitous environments by basing its processing on the user profile and by specifying a collaboration with the IEEE 802.21 standard, which manages the mobility of users and participates in the creation of profiles. Details of the implantation and experimental tests are also shown in this paper.

Security Aspects in Web of Data Based on Trust Principles. A brief of Literature Review

“…• In addition, WebID Incubator Group [15] -W3C research group, has developed FOAF+SSL [78]- [61], which is a safe authentication protocol that allows using of this kind of access control ontologies. It is a oneconnection authentication system that uses the SSL layer [48,99] virtually built in every web browser that uses HTTPS. It is based on WebID [61], a Web identification system based on URIs.…”

Improvement of a service level negotiation protocol using formal verification

“…This information is related to user, application, terminal and access network [1]. It is collected by the user terminal and allows it to specify the SLS to negotiate with domains managers involved in service offer.…”

“…This protocol uses web services to provide all the negotiation parts with interoperability. The negotiation process is based on a user profile to automate the adaptation of the service level to the changes occurring on the user context [1]. Some tests were performed to check the good functioning of our SLNP implementation and evaluate its performances like mean negotiation time and size of exchanged messages [2].…”