A cross-layer framework for symbiotic relaying in cognitive radio networks

Nadkar, Taskeen; Thumar, Vinay; Shenoy, Gautam; Mehta, Amit; Desai, U.B.; Merchant, S. N.

doi:10.1109/dyspan.2011.5936240

Cited by 26 publications

(25 citation statements)

References 15 publications

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“…The UPS architecture (combining both primary and secondary networks) allows to offer much richer services and applications than those services that were studied in [5], [6], [8], [9], [12], [13], [15]. Although the two networks are combined, the service and applications offered to users in each network can still be supported by implementing certain traffic engineering policies.…”

Section: B Ups: An Overviewmentioning

confidence: 97%

“…The primary transmitter leases the second time slot to the secondary node (relay node) so that the secondary node can use the time slot to help relay the primary node's traffic while transmitting its own data. In [9], Nadkar et al considered how to offer incentive (in terms of time and frequency) to a secondary network to help transmit primary user's traffic. They studied a cross-layer optimization problem that maximizes the transmission opportunities for the secondary users while offering a guaranteed throughput to the primary users.…”

Section: The Case Of Ups a State Of The Artmentioning

confidence: 99%

“…These research were motivated by the fact that given that the secondary network is co-located with the primary network in the same geographical region, the primary network may take advantage of the secondary network, at the node level, to help forward its data. To date, efforts along this direction (see, e.g., [5], [6], [8], [9], [12], [13], [15]) have been limited to only having secondary nodes help relaying primary users' traffic. There is no consideration of the converse (i.e., primary helping the secondary), or a broader vision of a policy-base cooperation between the two networks.…”

Section: Introductionmentioning

confidence: 99%

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UPS: A United Cooperative Paradigm for Primary and Secondary Networks

Yuan

Shi

Hou

et al. 2013

2013 IEEE 10th International Conference on Mobile Ad-Hoc and Sensor Systems

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The dominant spectrum sharing paradigm of today is the interweave paradigm. This paper advocates a new and alternative paradigm called United network of Primary and Secondary networks (UPS). UPS allows a complete cooperation between primary and secondary networks at the node level to relay each other's traffic, in addition to existing dynamic spectrum access (DSA) in time, space, and frequency domains. Such cooperation allows the primary and secondary networks to access a much richer network resources from the combined network. As a case study, we consider a problem with the goal of supporting the rate requirement of the primary network traffic while maximizing the minimum throughput of the secondary sessions. For this problem, we develop an optimization model and formulate a combinatorial optimization problem. Although this problem is in the form of mixed integer linear program (MILP), we can use CPLEX to solve it efficiently. Simulation results show that the UPS paradigm offers much better throughput performance than the interweave DSA paradigm.

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Section: B Ups: An Overviewmentioning

confidence: 97%

Section: The Case Of Ups a State Of The Artmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

UPS: A United Cooperative Paradigm for Primary and Secondary Networks

Yuan

Shi

Hou

et al. 2013

2013 IEEE 10th International Conference on Mobile Ad-Hoc and Sensor Systems

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“…All of the aforementioned works in literature have considered either a single relay node or single channel CR networks. The authors have also contributed significantly towards SCR paradigms for multi-channel multihop networks [7][8][9][10][11], the details of which are provided in (1) section.…”

Section: Scr For Crmentioning

confidence: 99%

“…The SUs can achieve their communication in the time incentive without the need for spectrum sensing. The authors have previously formulated a cross-layer design to enable the SCR scheme called cognitive relaying with time incentive (CRTI), for an orthogonal frequency division multiplexing (OFDM)-based multi-hop CR network [8]. The authors have also proposed that it is possible to reward the SUs with incentive frequency bands, i.e., cognitive relaying with frequency incentive [7,9].…”

Section: Introductionmentioning

confidence: 99%

Distributed execution of cognitive relaying with time incentive: multiple PU scenario

Nadkar

Thumar

Desai

et al. 2012

J Wireless Com Network

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The prime focus of this study is in developing distributed algorithms for cognitive relaying with time incentive for multiple primary users (CRTI-M). CRTI-M is a symbiotic paradigm in which the incumbent primary users (PUs) of the spectrum, with weak transmission links, seek cooperation from the cognitive secondary user (SU) nodes in their vicinity, and in return reward them with an incentive time for the latter's own communication. When relaying through the SU network, each PU can either use its own spectrum or that of the other PUs. Cross-layer optimization problems are formulated to enable both these possibilities in a multi-hop multi-channel cognitive radio network with the objective of maximizing the cumulative time incentive for the SUs. Corresponding distributed algorithms are developed, which face the challenge of meeting the constraints of the formulated problems with only local information and the lack of a centralized controller. Further, to make the CRTI-M schemes practically realizable, a MAC scheduling protocol is suggested, which gives emphasis to the distributed implementation and provides a unified framework for the PUs and SUs. Simulation results are furnished to demonstrate the effectiveness of the proposed algorithms.

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