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We study the degrees of freedom (DoFs) of a multiple-input multiple-output $K$-pair two-way relay channel with delayed channel state information (CSI) with $J$ distributed relays. In the considered model, we assume that the users are equipped with $M$ antennas and the relay with $N$ antennas. We propose two schemes, where the signaling design can be carried out either in each individual time slot...
E-health is one of the domains which will need more and more IoT solutions in the future, as it requires short delays for life-dependency situations and safe local storage spaces for privacy matters. The emergency context demands efficient communication and computing capacities, and the cloud vision as well as traditional TCP/IP way of communication cannot really suit these requirements. New approaches...
This paper considers the controller design problem for mean-square asymptotical synchronization of discrete-time neural networks with time-varying delay. By applying Lyapunov function method, a delay-dependent sufficient condition is proposed and formulated in the form of linear matrix inequalities(LMIs). Meanwhile, the feedback controller is derived to guarantee the asymptotical stability of the...
In cognitive radio networks (CRNs), the spectrum utilization can be dramatically improved with the secondary users (SUs) accessing the unoccupied licensed channels opportunistically. However, how to fully utilize the spectrum holes to meet the quality of service requirements of SUs is still an open issue. In this paper, we focus on multi-user, multi-channel case, and analyze the stable channel state...
Fog computing is considered as a trend for future wireless sensor networks (WSNs) due to low latency and energy-saving. However, because different fog services have different quality of service (QoS) requirements and related data are forwarded by content-aware traffic control, it is a must for fog computing advanced WSNs to deploy QoS policy dynamically. Software-Defined Networking (SDN) is a future...
Traffic forwarding is a fundamental function in network operations. And forwarding traffic dynamically according to the current situation is attractive to network providers. With its programmability, Software-Defined Networks (SDN) provide network providers dynamic traffic forwarding ability. But SDN only provides trivial flow table to control traffic forwarding that is not an effective way for applications...
In cognitive radio network (CRN), the utilization of wireless spectrum can be dramatically improved with the secondary user (SU) opportunistically access the licensed channels. With the help of spectrum sensing technology, the SU can dynamically access a large number of spectrum holes. However, how to allocate the spectrum holes between SUs becomes a thorny problem. The utilization of proper allocation...
Signal processing requires high performance digital signal processors(DSP) and hardware accelerators. Real and complex multiply-accumulate(MAC) units are the most critical computation units in the DSPs and accelerators, which greatly impact the performance, power and chip area of the signal processing system. A fixed-point Single-Instruction-Multiple-Data(SIMD)/vector MAC architecture is presented...
Chord is a popular and successful topology for Peer-to-Peer (P2P) data sharing. However, the conventional chord is challenged by two main drawbacks. First, it fails to consider the physical topology of the P2P network for designing the lookup solution, which may bring tremendous delay to network routing. Second, its performance of is usually limited by the high space complexity of data storage and...
There are numerical fractional differential equations models in the fields of signal and image processing. In this paper, we show some new existence and uniqueness results for the fractional differential equations with delay and impulse effects. Our methods is based on the equivalent norm techniques and fixed point theorem. An illustrative example is presented in the last section.
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