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On Downlink Capacity of Cellular Data Networks With WLAN/WPAN Relays.

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Title: On Downlink Capacity of Cellular Data Networks With WLAN/WPAN Relays.
Authors: Radunovic, Boz˘idar1, Proutiere, Alexandre2
Source: IEEE/ACM Transactions on Networking. Feb2013, Vol. 21 Issue 1, p286-296. 11p.
Subjects: Mobile communication systems, Wireless LANs, Computer scheduling, Computer simulation, Radio relay systems, Computer network protocols
Abstract: We consider the downlink of a cellular network supporting data traffic in which each user is equipped with the same type of IEEE 802.11-like WLAN or WPAN interface used to relay packets to further users. We are interested in the design guidelines for such networks and how much capacity improvements the additional relay layer can bring. A first objective is to provide a scheduling/relay strategy that maximizes the network capacity. Using theoretical analysis, numerical evaluation, and simulations, we find that when the number of active users is large, the capacity-achieving strategy divides the cell into two areas: one closer to the base station where the relay layer is always saturated and some nodes receive traffic through both direct and relay links, and the farther one where the relay is never saturated and the direct traffic is almost nonexistent. We also show that it is approximately optimal to use fixed relay link lengths, and we derive this length. We show that the obtained capacity is independent of the cell size (unlike in traditional cellular networks). Based on our findings, we propose simple decentralized routing and scheduling protocols. We show that in a fully saturated network our optimized protocol substantially improves performance over the protocols that use naive relay-only or direct-only policies. [ABSTRACT FROM AUTHOR]
Copyright of IEEE/ACM Transactions on Networking is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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DbLabel: Engineering Source
An: 85487971
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  Data: On Downlink Capacity of Cellular Data Networks With WLAN/WPAN Relays.
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  Data: <searchLink fieldCode="JN" term="%22IEEE%2FACM+Transactions+on+Networking%22">IEEE/ACM Transactions on Networking</searchLink>. Feb2013, Vol. 21 Issue 1, p286-296. 11p.
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  Data: <searchLink fieldCode="DE" term="%22Mobile+communication+systems%22">Mobile communication systems</searchLink><br /><searchLink fieldCode="DE" term="%22Wireless+LANs%22">Wireless LANs</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+scheduling%22">Computer scheduling</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+simulation%22">Computer simulation</searchLink><br /><searchLink fieldCode="DE" term="%22Radio+relay+systems%22">Radio relay systems</searchLink><br /><searchLink fieldCode="DE" term="%22Computer+network+protocols%22">Computer network protocols</searchLink>
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  Data: We consider the downlink of a cellular network supporting data traffic in which each user is equipped with the same type of IEEE 802.11-like WLAN or WPAN interface used to relay packets to further users. We are interested in the design guidelines for such networks and how much capacity improvements the additional relay layer can bring. A first objective is to provide a scheduling/relay strategy that maximizes the network capacity. Using theoretical analysis, numerical evaluation, and simulations, we find that when the number of active users is large, the capacity-achieving strategy divides the cell into two areas: one closer to the base station where the relay layer is always saturated and some nodes receive traffic through both direct and relay links, and the farther one where the relay is never saturated and the direct traffic is almost nonexistent. We also show that it is approximately optimal to use fixed relay link lengths, and we derive this length. We show that the obtained capacity is independent of the cell size (unlike in traditional cellular networks). Based on our findings, we propose simple decentralized routing and scheduling protocols. We show that in a fully saturated network our optimized protocol substantially improves performance over the protocols that use naive relay-only or direct-only policies. [ABSTRACT FROM AUTHOR]
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  Data: <i>Copyright of IEEE/ACM Transactions on Networking is the property of IEEE and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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        Value: 10.1109/TNET.2012.2198072
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        Text: English
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        PageCount: 11
        StartPage: 286
    Subjects:
      – SubjectFull: Mobile communication systems
        Type: general
      – SubjectFull: Wireless LANs
        Type: general
      – SubjectFull: Computer scheduling
        Type: general
      – SubjectFull: Computer simulation
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      – SubjectFull: Radio relay systems
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      – SubjectFull: Computer network protocols
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      – TitleFull: On Downlink Capacity of Cellular Data Networks With WLAN/WPAN Relays.
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              Text: Feb2013
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