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Due to the stringent energy constraint wireless "s, network management cost for lifetime becomes" "sensor node" "one of the crucial issues in designing wireless sensor networks (WSNs). In such situation, guaranteed network lifetime is more preferred than unpredictable pro-long one. However, despite of its importance and necessity in real world deployment, few research works...
This paper investigates the outage performance of an amplify-and-forward (AF) relay network with varying number of relays (RN-VR). In the previous works for the analysis of multi-relay networks, the number of available relays is always assumed to be fixed. Thus, the performance and diversity of the relay network is determined by the assumed number of available relays. However, under some practical...
We investigate a performance of cooperative relaying in the device-to-device (D2D) systems underlaying cellular networks while considering power constraints on the average received-interference at the evolved NodeB (eNB). Specifically, we consider the D2D communication assisted by relays using multihop decode-and-forward (DF) strategy in interference existing circumstances. In this paper, we obtain...
The outage probability of dual-hop amplify-and- forward (AF) relaying scheme with partial relay selection is derived when the multiple interferences affect on the relay nodes. In contrast to the previous works, we focus on analyzing the effect of multiple interferences which make the transmission channel degraded. Following the partial relay selection policy, the best source to relay path is selected...
In this letter, the exact form of the outage probability for opportunistic amplify-and-forward (AF) partial relay selection scheme in interference-limited environment is derived. It is assumed that multiple interferers affect only on the relays due to the multicell environment of wireless networks. Analysis in this paper can be an efficient technique for investigating the effect of interference in...
Relaying technique has been developed considerable attention in response to improve reliability and to extend wireless network coverage. One of conventional relaying technique, incremental relaying which uses limited feedback from the destination has attracted research attention because of performance and minimization of relay usage. Moreover, optimal power allocation for various relaying schemes...
In this paper, an efficient Decode-and-Forward (DF) relay selection scheme for interference-limited relaying networks is considered. In contrast to previously reported works, we consider multiple interferences which make the conventional relay selection schemes not suitable for interference-limited networks and propose a new relay selection scheme for DF protocol with multiple interferences. Approximate...
It's necessary to enhance the capacity of wireless access network to provide mobile IPTV service. In this paper MMR(Mobile Multi-hop Relay) system is introduced to increase the performance of mobile system based on IEEE 802.16m which introduced network coding technology to increase the performance of radio link. Radio link quality and mobile terminal throughput are analysed by simulation when RS(Relay...
In this paper, a novel observe-and-forward (OF) cooperative scheme is proposed for relay-enhanced wireless cooperative systems. In this scheme, the codewords transmitted from the source are regenerated by the decoder at the relay and forwarded without re-encoding or interleaving. The decoding processes for different streams of a transmitted codeword can be parallel, which greatly reduces the relaying...
In this paper, a distributed mobile relay power control (DMRPC) scheme for maximizing individual cell throughput is proposed for mobile relay station (MRS) aided system. In the system with DMRPC, the power levels of MRSs are controlled by individual cell without cell cooperation and signaling overhead, and the appropriate power levels of MRSs are selected to maximize the cell throughput of their individual...
Routing between a base station and a mobile station is one of the key issues that should be addressed in multi-hop cellular systems. It should also take into account maximization of the radio resource utilization of the entire system, in which the radio resource of each cell must be shared by the base station and relay stations. In this paper, we propose a joint bandwidth allocation and routing scheme...
To enhance coverage and throughput of IEEE 802.16 networks, 802.16j task group has standardized capabilities and functionalities of multi-hop relay (MR). This paper first mentions simulation assumptions based on the draft of IEEE 802.16j. We present three relay station (RS) deployment scenarios of throughput enhancement, coverage extension and mobile relay. This paper takes WiBro as an example of...
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