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Hybrid Mobile Cloud Computing (HMCC) refers to a Mobile Computation Outsourcing (MCO) model that exploits hybrid granular cloud-based resources composed of coarse-, medium-, and fine-grained resources interconnected by wireless and wired networks to augment mobile devices. Leveraging single type of granules for augmentation (i.e., vertically heterogeneous) has its own deficiencies of low proximity...
The complexity of mobile communication systems is permanently increasing. This is due to the introduction and refinement of sophisticated communication mechanisms such as multiple input multiple output (MIMO), hybrid ARQ, channel-aware scheduling, or node cooperation. Many of these mechanisms require detailed multi-cell simulation models for their performance evaluation. This involves computationally...
In many DSP applications (image and voice processing, baseband symbol decoding in high quality communication channels) several dBs of SNR loss can be tolerated without noticeable impact on system level performance. For power optimization in such applications, voltage overscaling can be used to operate the arithmetic circuitry slower than the critical circuit path delay while incurring tolerable SNR...
A low power reconfigurable DCT architecture is proposed, which can be run at three transform precision levels for different demands. Using the character of energy distribution of the DCT matrix after 2D DCT operation, we selected the best DCT bases which achieve considerable power reduction in DCT operation with minimum image quality degradation. The reconfigurable architecture can achieve power saving...
We address the specification and the formal analysis of systems involving multiple facets. This leads to heterogeneous specifications that cover the different facets of these systems. A method, multifacet specification and analysis, is proposed to master the heterogeneity of systems by considering an abstract reference model that is referred to as a semantic reference for the specific models which...
More and more users subscribing to wireless broadband services are seeking to have access to both WLAN and UMTS networks. We study individually optimal user-network association in an integrated WLAN and UMTS hybrid cell. The association problem is formulated within a non-cooperative game framework. In the formulation, mobile arrivals are assumed to follow the Poisson process and each mobile considers...
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