Fixed relays for next generation wireless systems — System concept and performance evaluation

Pabst, R.; Esseling, N.; Walke, Bernhard

doi:10.1109/jcn.2005.6387858

Cited by 12 publications

(3 citation statements)

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“…In the literature, the performance studies for relaying networks mainly focus on capacity enhancement [10][11][12] and coverage extension [13,14]. In [15], the authors discussed three typical resource allocation schemes for relaying networks, including relaying in time-domain, relaying in frequency-domain, and hybrid time/frequencydomain relaying schemes. The work in [16] studied the impacts of the number of RSs and relay transmission power on throughput, given the locations of RSs.…”

Section: Introductionmentioning

confidence: 99%

Design of optimal relay location in two-hop cellular systems

et al. 2010

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Relay stations are usually used to enhance the signal strength for the users near cell boundary, thereby extending the cell coverage. However, transmission through a relay station needs two transmission phases. The first phase is from base station to relay station, and the second one is from relay station to mobile station. Thus, using relay station may decrease system capacity due to two-phase transmission time. As a result, whether or not data are transmitted by one-hop or two-hop phases should be determined according to both signal strength and throughput. In this paper, we investigate the optimal relay location aiming to maximize system capacity. We consider two relay selection rules for determining whether two-hop transmission will be used: signal strength-oriented and throughput-oriented selection rules. We find that the signal strength-oriented two-hop transmission may yield even lower system capacity than the one-hop transmission. In the throughput-oriented scheme, the two-hop transmission can achieve higher system capacity than the one-hop transmission. By simulations, we determine the optimal relay location and show the coverage enhancement by the relaying network. Extensive simulations are performed to investigate the impacts of relay transmission power and the number of relay stations on system capacity and optimal relay location. The simulation results reveal important insights into designing a relaying network with high system capacity.

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Section: Introductionmentioning

confidence: 99%

Design of optimal relay location in two-hop cellular systems

et al. 2010

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“…On the other hand most users can be expected in areas more far away from the BS due to the increased coverage area with increasing distance [2]. Fixed layer-2 Relay Node (RN) based appear to be the most promising technology to bring the capacity available at the BS into the area [3] [4].…”

Section: Introductionmentioning

confidence: 99%

Fixed Relays for Cost Efficient 4G Network Deployments: An Evaluation

Schultz

Walke

2007

2007 IEEE 18th International Symposium on Personal, Indoor and Mobile Radio Communications

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The paper provides a qualitative performance assessment of relay based deployment concepts in comparison to single-hop deployment. The results in this paper prove the general assumption that the deployment of Relay Nodes (RNs) provide a strong opportunity to reduce the network deployment cost substantially. It is shown how low power RNs have to be applied in cellular scenarios with high power Base Stations (BSs) and what cost benefits can be expected. The qualitative results show that the low power relays do have the potential to decrease the deployment cost. It is further shown that a parallelization of the relay link between the RNs and the serving BS will help to improve the cost efficiency of the relay based deployment concept.

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“…An early work on this subject is represented by [69], where a MAC protocol for cellular multihop transmission is proposed , starting from the HYPERLAN2…”

Section: Mac Protocols For Relay Networkmentioning

confidence: 99%

Radio engineering of relay-based cellular networks

Minelli¹

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Data traffic demand in today's cellular networks is growing very rapidly, and operators are looking for cost-effective solutions to increase the capacity and coverage of their networks. Relay nodes have been proposed as one of the candidate solutions to achieve this target. Briefly, a relay node is a network device which is in charge of forwarding the data received from its reference base stations to a number of controlled mobile users, and forwarding the data transmitted by these mobile users to the base station. In this way, the base station can be partially offioaded, and the spatial density of network access point is increased. A similar result could be obtained by deploying more base stations. However, relays may be preferred by network operators, because they are smaller and cheaper than base stations, and they should hence allow for increasing the density of network stations without an exorbitant increment of the costs related to the deployment of new nodes and the related site rentals. Moreover, relay nodes do not require any backhaul cable, as they are connected to their reference base station via a wireless backhaul link. However, the deployment of relays entails the creation of a two-hop wireless network. This means, that interference management is more complex compared to traditional cellular networks. Moreover, transmissions on the wireless backhaul link may use a significant quota of the available radio resources, thus reducing the resources available for transmissions to users. Starting from the expected advantages and disadvantages of relays deployment, this thesis is focused on the performance evaluation and the optimization of the radio layer of relay-enhanced cellular networks. In particular, numerous aspects have been treated, including the application of the fluid network ix

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Fixed relays for next generation wireless systems — System concept and performance evaluation

Cited by 12 publications

References 10 publications

Design of optimal relay location in two-hop cellular systems

Design of optimal relay location in two-hop cellular systems

Fixed Relays for Cost Efficient 4G Network Deployments: An Evaluation

Radio engineering of relay-based cellular networks

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