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In this paper, we focus on a shared relay architecture in the cellular network instead of deploying multiple separated relays near cell edges. The advantage of shared relaying is the joint processing of signals at the relay to suppress the inter-cell interference (ICI). The performance of a relay enhanced cellular system depends significantly on the resource allocation scheme, especially when taking...
Relay nodes (RNs) will be a key feature of future wireless networks. RNs can extend coverage, increase network capacity, and provide more uniform quality-of-service (QoS) across the cell area in a cost-effective manner. Therefore, not surprisingly, relaying techniques have attracted a significant amount of attention from the wireless industry and standards. The Third-Generation Partnership Project...
In this paper, we propose an inter-cell interference management scheme using a multi-cell SRN (Shared Relay Node) in order to avoid inter-cell interference and to increase the cell throughput in 3GPP LTE (3rd Generation Partnership Project Long Term Evolution)-Advanced networks. Recently, the CoMP (Coordinated Multi-Point transmission/reception) scheme has received growing attention as a promising...
This paper aims to formulate power and sub-channel allocation problem in a multi-cell Orthogonal Frequency Division Multiple Access (OFDMA) half-duplex decode-and-forward (DF) relay assisted network in the presence of multi-cell interference. This formulation takes into account multi-cell co-channel interference as one of the critical factors in multi-cell processing. The resulting non-convex optimization...
This paper proposes a joint routing and spectrum partitioning algorithm for cellular network enhanced with two-hop fixed relay nodes (RNs) in 3GPP LTE-Advanced. To better improve spectrum efficiency and effectively alleviate the inter-cell interference of cell-edge users, a Soft Frequency Reuse (SFR) based spectrum assignment framework is proposed. Under this framework, we develop a utility-based...
Continuous growth of cellular subscribers as well as demands for high-speed and high-quality multimedia services have made it necessary to increase system capacity and data rate. On the other hand, the energy consumed goes up accordingly as the data rates increases. Therefore, designing an efficient resources allocation scheme and architecture to improve the output performance and reduce energy consumption...
In this paper, we propose a new resource allocation scheme for an OFDMA relay network with multicells. In the proposed scheme, by sharing the channel state information (CSI) between base stations, resources are allocated to users and relays to maximize the overall sum of the achievable rate under fairness constraints. Simulation results show that the proposed scheme achieves higher spectral efficiency...
The requirements of IMT-Advanced dictate innovations in radio resource management, including cross-layer optimization of radio resource allocation, inter-cell coordination, and interference mitigation strategies, dynamic and aggressive resource reuse, as well as state-of-the-art spatial signal processing. All of these technologies must be supported by an advanced radio access network capable of exploiting...
This paper investigates the comparison of two different channelization schemes of relay links in the relay aided cellular network for different transmit power and the number of relays. One is the orthogonal relay subchannel allocation (ORRSA) which assigns each relay links to mobiles with orthogonal subchannels, leading to no interference between relays in the same cell. The other is the overlapped...
In order to improve the cell boundary throughput performance and to extend the coverage area, relay transmission with relay stations (RSs) is becoming a promising architecture. However, if RSs are introduced, interference between cells increases and the throughput improvement effect with RSs is prone to be restricted. In this paper, we propose a scheme reducing the interference from other cells by...
This paper explores the attributes, layering models and objective functions in cross layer designs for mobile ad hoc wireless networks by taking all the statistical characteristics and constraints from the physical (PHY) layer, media access control (MAC) layer and network (NET) layer into consideration. This paper reviews the entire network optimization across all the PHY/MAC/NET layers. At the PHY...
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