M. Carmen Lucas-Estan

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This paper presents SPHERE, a Simulation Platform for HEterogeneous wiREIess systems, and describes its motivation, methodology and implementation approach. This advanced system level simulation platform emulates simultaneously the transmission of GPRS, EDGE Multi-slot, HSDPA and WLAN at the packet level, which allows conducting novel investigations on(More)
Beyond 3G mobile communication systems are being defined as the integration of diverse radio access technologies into what is generally known as heterogeneous wireless systems. These systems present important challenges in terms of the management of the available radio resources for each radio access technology. Given the complexity of mobile communication(More)
Abstrad-Beyond 3G wireless systems will be composed of a variety of Radio Access Technologies (RATs) with different, but also complementary, performance and technical characteristics. To exploit such diversity while guaranteeing the interoperability and efficient management of the different RATs, common radio resource management (CRRM) techniques need to be(More)
—Wireless systems will be characterized by the coexistence of heterogeneous Radio Access Technologies (RATs) with different, but also complementary, performance and technical characteristics. These heterogeneous wireless networks will provide network operators the possibility to efficiently and coordinately use the heterogeneous radio resources, for which(More)
The study and design of Joint Radio Resource Management (JRRM) techniques is a key and challenging aspect in future heterogeneous wireless systems where different Radio Access Technologies (RAT) will physically coexist. In these systems, the total available radio resources need to be used in a coordinated way to guarantee adequate satisfaction levels to all(More)
A key aspect of Beyond 3G heterogeneous wireless systems is the definition of Joint Radio Resource Management techniques capable to efficiently manage the radio resources from different Radio Access Technologies physically coexisting. This work proposes a set of JRRM techniques based on linear programming optimization tools that simultaneously assign to(More)