The Infona portal uses cookies, i.e. strings of text saved by a browser on the user's device. The portal can access those files and use them to remember the user's data, such as their chosen settings (screen view, interface language, etc.), or their login data. By using the Infona portal the user accepts automatic saving and using this information for portal operation purposes. More information on the subject can be found in the Privacy Policy and Terms of Service. By closing this window the user confirms that they have read the information on cookie usage, and they accept the privacy policy and the way cookies are used by the portal. You can change the cookie settings in your browser.
In this article, we are interested in improving the handover quality of Host Identity Protocol (HIP) in the case of micro mobility by (i) proposing the Local Rendezvous Server architecture as a first attempt to minimize the handover delay in the mobility process, (ii) introducing an adaptive early update mechanism to improve the handover quality during mobility by introducing early HIP (eHIP) and...
This article addresses downlink resource allocation in multi-cell OFDMA mobile WiMAX systems using zone switching diversity method. We propose to use fractional frequency reuse for guaranteeing the quality of service for different service flows (SFs) in the system. Our approach includes an architecture which coordinates the allocation of resources in terms of slots (the basic allocation unit in time...
We consider a channel aware scheduling for the downlink multi-service flows in orthogonal frequency division multiple access (OFDMA) based mobile WiMAX (Worldwide Interoperability for Microwave Access)system. We propose an intelligent medium access control (MAC) that adapts with the physical layer in response to the different QoS requirements of the diverse service flows in the system. This adaptation...
The main challenge in the development of future wireless communication systems is to provide users with a wide range of services across different radio access technologies through a single mobile terminal, while maintaining the quality of service requirements. Thus, the need for seamless inter-working between heterogeneous wireless communication systems consisting of multiple radio access technologies...
IEEE802.16e is expected to support mobility for broadband wireless access with the capability of delivering high data rates over long ranges. We consider IEEE 802.216e scheme for scheduling and mapping higher layer data into the basic resource allocation units (slots) of OFDMA frames. Then, we introduce two simple allocation schemes that consider fair allocation among users with adaptive modulation...
In this paper we study the traditional resource allocation model in IEEE802.16e (mobile WiMax) and propose two algorithms for scheduling and mapping higher layer data into the basic resource allocation units (slots) of OFDMA frames in IEEE802.16e. Both scheduling and mapping approaches are based on the quality of service requirements of each service flow in terms of data rate and bit error rate (BER)...
The main challenge in the development of future wireless communication systems is to provide users with a wide range of services across different radio access technologies through a single mobile terminal, while maintaining the quality of service requirements. Thus, the need for seamless interworking between heterogeneous wireless communication systems consisting of multiple radio access technologies...
Future network environments will be heterogeneous and mobile terminals will have the opportunity to dynamically select among many different access technologies. Therefore, it is important to provide service continuity in case of vertical handoff when terminals change the access technology. Two important wireless access technologies are WLAN (wireless local access networks) and WMAN (wireless metropolitan...
Set the date range to filter the displayed results. You can set a starting date, ending date or both. You can enter the dates manually or choose them from the calendar.