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This paper studies the application of non-orthogonal multiple access (NOMA) to a cooperative multicast system (termed CM-NOMA). In particular, the multicast subscribers are served as secondary users underlaying a primary user. To enhance the secondary user fairness and compensate for the primary user, a two-stage cooperative strategy is proposed by selecting a certain secondary user to perform NOMA...
The development of the self-interference cancellation techniques enables wireless nodes to work with the full duplex (FD) mode. In cooperative relay networks, however, FD relay (FDR) may not always outperform the half-duplex relay (HDR) due to the residual self-interference (RSI). On the other hand, the hybrid HD/FD relay strategy can adaptively facilitate the network performance. This paper investigates...
Multi-radio multi-channel (MR-MC) networks contribute significant enhancement in the network throughput by exploiting multiple radio interfaces and non-overlapping channels. While throughput optimization is one of the main targets in allocating resource in MR-MC networks, recently, the network energy efficiency is becoming a more and more important concern. Although turning on more radios and exploiting...
This paper proposes a novel clustering scheme by incorporating both social and physical relationships among wireless terminals for Device-to-Device (D2D) communications. Given the explosive growth of online social networking activities, social interactions among mobile users and people's social behaviors can have strong impact on the efficiency of D2D cluster communications. We exploit the well known...
We consider a clustered wireless sensor network where sensors are randomly distributed within a circle area with the only cluster head in the center. After the cluster head broadcasts source message to nearby sensor nodes, those neighboring nodes which have successfully decoded the message may help relay data for the head to the destination using space-time block coding (STBC) scheme to form a virtual...
Abstract- The conventional single-relay aided two-phase cooperative network employing a so-called soft-input soft-output multiple-symbol differential sphere detection (SISO-MSDSD) and operating in a distributed turbo decoding mode incurs a high complexity and imposes a 50$\%$ half-duplex relaying induced throughput loss. In this paper, we combat both of these critical problems. We commence by evaluating...
To cope with the too much energy consumption of base station (BS), this paper firstly gives a green heterogeneous network architecture, in which some BSs could be switched off or set as sleep mode when its local traffic is low, while the resident users rely on the mobile relay network composed by intelligent mobile nodes to connect to one of its neighboring BSs. Moreover, in order to achieve better...
The cognitive routing can collect the network information, analyze the information and make the routing decision. A multi-strategy cognitive routing will choose the routing strategy adaptively by different network environment. In this paper, a cognitive multi-strategy routing with QoS constraint and load balance is proposed. If the payload of network is light, parameters of QoS performance, such as...
In recent years, with the rapid development of wireless communication theory and technology, wireless technology is becoming more and more important in the global Internet theory. The computer network based on the cable is shifting to a mixing network of wired and wireless. The TCPW algorithm under the hybrid network is unable to estimate the band width accurately, so this paper proposed an improved...
Design of an IPSec (Internet Protocol Security) IP-Core for 10 Gigabit Ethernet Security Processor is presented in this paper. The highest data throughput of one IPSec IP-Core can achieve 1.5Gbps. With parallel 8 IP-Cores, this design can achieve 10Gbps data process and fulfill a Gigabit Ethernet Security Processor requirement. The low power dissipation is also used in the IP-Core to reduce power...
Scheduling algorithms are very important in WiMAX allowing an efficient radio resources distribution to the uplink and downlink connections. However, the IEEE 802.16 standard does not specify which scheduling algorithm(s) should be used. In this paper, we propose a review of scheduling algorithms proposed for WiMAX / IEEE 802.16 system. We also propose some considerations for the spectrum efficiency...
A novel cooperative routing protocol, namely throughput-optimized cooperative routing (TOCR) protocol, is proposed to improve network throughput in ad hoc network. Through calculation, we can deduced that by fixed transmission power, a cooperative node can raise received signal to noise ratio (SNR) at the receiving of recipient node, and then increase the probability of successful packets reception...
In this paper, we introduce an extension of Stream Control transmission Protocol (SCTP) aiming for improving the efficiency of delay-sensitive transmission of multimedia data such MPEG-4 traffic. Briefly, our SCTP extension exploits one-way delay between SCTP endpoints, which allows the SCTP extension to retransmit lost packets selectively depending on whether the lost packets would still arrive before...
This paper presents two new design methodologies for throughput-centric wave-pipelined interconnects: cascaded buffers insertion and transistor sizing. Experimental results show that up to 185% throughput improvement can be achieved by applying the new proposed approaches compared with conventional interconnect optimization techniques, such as buffer insertion. Moreover, with the combination of cascaded...
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