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opportunistic network coding-Assisted Cloud Offloading in Heterogeneous Fog Radio Access networks

IEEE ACCESS 2019年 7卷 56147-56162页

作者： Shnaiwer, Yousef N. Sorour, Sameh Al-Naffouri, Tareq Y. Al-Ghadhban, Samir N. King Fahd Univ Petr & Minerals Dept Elect & Comp Engn Dhahran 31261 Saudi Arabia Univ Idaho Dept Elect & Comp Engn Moscow ID 83844 USA King Abdullah Univ Sci & Technol Comp Elect & Math Sci & Engn Div Thuwal 23955 Saudi Arabia

Caching and cloud control are new technologies that were suggested to improve the performance of future wireless networks. Fog radio access networks (F-RANs) have been recently proposed to further improve the throughput of future cellular networks by exploiting these two technologies. In this paper, we study the cloud offloading gains achieved by utilizing F-RANs that admit enhanced remote radio heads (eRRHs) with heterogeneous wireless technologies, namely, LIE and WiFi. This F-RAN architecture thus allows widely proliferating smart phone devices to receive two packets simultaneously from their inbuilt LIE and WiFi interfaces. We first formulate the general cloud base station (CBS) offloading problem as an optimization problem over a dual conflict graph, which is proven to be intractable. Thus, we formulate an online version of the CBS offloading problem in heterogeneous F-RANs as a weighted graph coloring problem and show it is NP-hard. We then devise a novel opportunistic network coding (ONC)-assisted heuristic solution to this problem, which divides it into two subproblems and solves each subproblem independently. We derive lower bounds on the online and aggregate CBS offloading performances of our proposed scheme and analyze its complexity. The simulations quantify the gains achieved by our proposed heterogeneous F-RAN solution compared with the traditional homogeneous F-RAN scheme and the derived lower bounds in terms of both CBS offloading and throughput.

关键词： Fog radio access networks enhanced remote radio heads opportunistic network coding conflict graph

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Stability Region and Delay Analysis of a SWIPT-Based Two-Way Relay network With opportunistic network coding

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IEEE TRANSACTIONS ON VEHICULAR TECHNOLOGY 2020年第12期69卷 15682-15693页

作者： Moradian, Masoumeh Ashtiani, Farid Khonsari, Ahmad Inst Res Fundamental Sci IPM Sch Comp Sci Tehran *** Iran Sharif Univ Technol Dept Elect Engn Adv Commun Res Inst ACRI Tehran 111554363 Iran

In this article, we consider a buffer-aided two-way relay network in which a wireless-powered relay acts as an intermediate node for exchanging the data between two sources. The relay applies a time-switching (TS) policy to switch between data decoding (DD) and energy harvesting (EH) modes. Due to the presence of data queues at the relay, the relay is capable of employing opportunistic network coding (ONC) for transmission of the packets. Based on some realistic assumptions, we derive the stability region of such a network through designing TS and ONC policies. It is proved that the stability region is characterized by the TS policy and zero-wait ONC policy. Moreover, we derive the throughput-optimal and power-optimal policies and show that these policies provide the maximum coding opportunities. Also, we derive the average delay of an applied TS-ONC policy at the relay through modeling the data queues and energy buffer of the relay by two inter-related quasi-birth-death processes. We show that although waiting in ONC does not contribute to throughput-optimal and power-optimal policies, it can reduce the average delay. Finally, through simulation, we confirm our analytical results.

关键词： Stability analysis Delays Uplink Numerical stability Relay networks (telecommunication) network coding Delay opportunistic network coding quasi-birth-death process SWIPT throughput two-way relay network

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A one-hop opportunistic network coding algorithm for wireless mesh networks

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WIRELESS networkS 2018年第4期24卷 1007-1018页

作者： Alic, Kemal Svigelj, Ales Jozef Stefan Inst Dept Commun Syst Jamova Cesta 39 Ljubljana 1000 Slovenia

This paper proposes a Bearing opportunistic network (BON) coding procedure that operates in wireless multihop networks over multiple unicast sessions and it introduces very low overhead to the network. The BON coding is used to increase network performance in terms of a higher throughput and a lower delay. It can be seen as an independent layer in the communication stack, relying solely on information that is on the node itself. The proposed coding procedure is easy to implement and deploy. The performance evaluation of the BON coding procedure was performed in a dedicated simulation model. The comparison was made to the well-known network coding procedure COPE and the case where network coding is not used at all. Results show that BON coding increases the network goodput and decreases the delay in comparison to COPE and case where network coding is not used.

关键词： opportunistic network coding Intersession network coding Wireless multihop networks network utility optimization

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An opportunistic network coding Routing for opportunistic networks

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INTERNATIONAL JOURNAL OF PARALLEL PROGRAMMING 2017年第1期45卷 157-171页

作者： Yao, Jiansheng Ma, Chunguang Wu, Peng Du, Gang Yuan, Qi Harbin Engn Univ Coll Comp Sci & Technol Harbin 150001 Peoples R China Jilin Normal Univ Coll Comp Sci Siping 136000 Peoples R China

In opportunistic networks (OppNets), instead of assuming a complete path, messages are exchanged opportunistically when two nodes encounter. To support efficient and reliable end-to-end messaging in OppNets, a number of routing protocols based on network coding have been proposed. However, few efforts in the studies focus on opportunistic network coding (ONC). It is because the coding opportunities do not probably exist in OppNets due to nodal mobility, low density, lossy link, etc. In this paper, an ONC routing model for OppNets based on a new hybrid communication scheme was proposed. The communication scheme combines contact-based communication mode used by most routing protocols in OppNets and contact duration-based communication mode employed by few routing protocols in OppNets. We also designed an ONC routing protocol based on the ONC routing model in OppNets. Simulated results show that compared with Epidemic routing, the ONC routing can achieve higher delivery ratio and lower delay but consume fewer network cost.

关键词： opportunistic networks Delay-tolerant networks network coding opportunistic network coding

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A User Grouping Based opportunistic network coding Scheme for Multi-user Multi-relay Uplink Transmissions

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WIRELESS PERSONAL COMMUNICATIONS 2016年第3期86卷 1629-1652页

作者： Wang, Jian Xu, Youyun Xu, Kui Wang, Cong PLA Univ Sci & Technol Coll Commun Engn Nanjing 210007 Jiangsu Peoples R China

In this paper, we study a User Grouping based opportunistic network coding (UG-ONC) scheme for multi-user multi-relay uplink transmission scenario. In traditional opportunistic network coding (ONC) schemes, the use of network coding is often determined by the state of relays, i.e., buffer, packets waiting time, packets' successful decoding. However, whether the use of network coding is beneficial to the users is not considered. In our proposed UG-ONC scheme, whether network coding is adopted is not only determined by the state of relays, but also by the link quality between users and base station, that is, determined by the state of users. We consider two information-theoretic metrics, i.e., outage probability and throughput, to evaluate the validity and reliability of the UG-ONC scheme. And the approximate expressions of outage probability and throughput are derived. To further examine the performance of the scheme, we compare UG-ONC scheme with an existent network coding scheme. Monte Carlo simulations are presented to validate our analysis. The results show that our proposed UG-ONC scheme achieves considerable gains over the traditional network coding scheme. Our proposed UG-ONC scheme gives a new thought for designing opportunistic network coding.

关键词： Cooperative communication Multi-user multi-relay transmissions opportunistic network coding Outage probability Throughput

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Energy-efficient opportunistic network coding algorithms for wireless networks 24

Energy-efficient opportunistic network coding algorithms for...

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International Conference on Computer Communications and networks ICCCN

作者： Koo, Ki-sung Govindarasu, Manimaran Iowa State Univ Dept Elect & Comp Engn Ames IA 50011 USA

ISBN: (纸本)9781479999644

A Transmission Algorithm using opportunistic network coding (TAONC) searches coding opportunities that minimize the amount of radio communication energy between a sender and multiple receivers in wireless networks. It calculates the energy gain of network coding at both a sender and receivers when a TAONC reduces communication energy by encoding multiple transmission packets into one. It considers the energy overheads, which are consumed by the TAONC and a Reception Algorithm using opportunistic network coding (RAONC). We show that opportunistic network coding can effectively decrease the wireless communication energy even with consideration of the overheads. We study an appropriate algorithm complexity that optimizes the benefit of network coding with its overhead.

关键词： Wireless networks opportunistic network coding

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An amplify-and-forward based opportunistic network coding scheme for two-way wireless relaying systems

An amplify-and-forward based opportunistic network coding sc...

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6th International Conference on Wireless, Mobile and Multi-Media (ICWMMN 2015)

作者： Hao Duan Yuanyuan Gao Mingxi Guo Shengyu Nie Institute of Communications Engineering PLA University of Science and Technology 210000 Nanjing China Nanjing University of Posts and Telecommunications 210000 China

ISBN: (纸本)9781510822030

The two-way relaying system is a promising research direction, for which there are two well-known amplify-and-forward (AF)-based protocols: analog network coding (ANC) and time division broadcast (TDBC). In this paper, we first compare the outage probability performance of these two protocols under the same conditions. It can be observed that ANC performs better under the low SNR circumstance, while TDBC is superior in the high. On this basis we put forward an opportunistic network coding scheme, which can choose the better transmission strategy according to instantaneous channel state. More optimal performance can be obtained by the help of the improved scheme. Furthermore, we derive a tight lower bound of the outage probability for the opportunistic network coding scheme, which is very close to the exact value for the whole SNR range. This is proved by simulation and numerical results.

关键词： Two-way relaying Amplify-and-forward Outage probability network coding Analog network coding (ANC) Time division broadcast (TDBC) opportunistic network coding network coding Bidirectional relaying transmission strategies Acid neutralising capacity

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Research on Data Transmission Algorithm Based on Random network Theory and opportunistic network coding in WSN

Research on Data Transmission Algorithm Based on Random Netw...

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2015 International Conference on Computer Science and Environmental Engineering(CSEE 2015)

作者： X.Feng J.J.Zhang Z.Liu T.Li Y.L.Wang W.L.Yang College of Computer Science and Technology Changchun University of Science and Technology

Since wireless network link and network topology are polytropic,many problems of data transmission in WSN are drawing public *** the contrary,network coding has a certain advantage in the aspect of improving retransmission efficiency and reducing *** this paper,we analyzed the working principle of wireless network coding in depth and we researched a network coding algorithm based on random network and opportunistic network to solve the problem of wide bandwidth and low efficiency of *** specific approach was:using traditional retransmission ARQ mechanism and random network theory-during the first data package transmission,some packages are not transmitted according to random selection but these packages would be transmitted during the second transmission with retransmission *** second retransmission is made up of lost data and packets which were not transmitted during the first *** method could not only reduce the number of packets and retransmission times but also improve transmission efficiency and network throughput.

关键词： Wireless Sensor network opportunistic network coding Random network Data retransmission Throughput capacity

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Joint Transmission Rate Control and opportunistic network coding Over Wireless networks

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WIRELESS PERSONAL COMMUNICATIONS 2014年第1期78卷 119-136页

作者： Liu, Qinglong Feng, Gang Univ Elect Sci & Technol China Natl Key Lab Sci & Technol Commun Chengdu 611731 Peoples R China

Existing opportunistic network coding architectures (e.g., COPE) rely on pseudobroadcast to deliver a coded packet to multiple receivers in a single transmission. Only the primary receiver acknowledges the reception by MAC-layer acknowledgements (synchronous ACKs) and the other receivers receive the coded packet by overhearing and acknowledge the reception by asynchronous ACKs, which are usually piggybacked in outgoing data packets. In realistic wireless networks, this mechanism may cause unnecessary retransmissions if asynchronous ACKs are dropped due to packet losses or arrive late and thus compromise the throughput gain brought by network coding. In this paper, we propose a framework of joint rate control and code selection (ORC) to address this issue, aiming at improving the performance gain of opportunistic network coding in wireless networks. The framework of ORC consists of two mechanisms: (1) Rate control: the optimal transmission rate for coded packets is selected by formulating the rate control process as a Finite Horizon Markov Decision Process. (2) Code selection: based on the results of rate selection, the packet combination for forming the coded packet is determined. Numerical results show that ORC can substantially improve the performance gain of opportunistic network coding compared with COPE.

关键词： COPE opportunistic network coding Transmission rate control

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Payload-Distributed GEO Communication Satellite System and opportunistic network coding Based Cooperative Information Exchange

Payload-Distributed GEO Communication Satellite System and O...

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International Forum on Computer and Information Technology (IFCIT)

作者： Gou, Liang Zhang, Gengxin Xie, Zhidong Xu, Zhiping Long, Hongwei PLA Univ Sci & Technol Coll Commun Engn Nanjing Jiangsu Peoples R China

ISBN: (纸本)9783038350194

Fractionated Spacecraft is a concept which transforms a traditional monolithic spacecraft into a network of elements where a free-flying payload module is supported by nearby free-flying infrastructure modules. In this paper, we propose a novel concept named as Payload-Distributed GEO Communication Satellite System (PD-GEO) which divides the traditional GEO communication satellite into several modules. Those modules can be reconfigured, added, or exchanged independently from the others, and be reused over several missions. Then, for the purpose of reliable and high-efficient data transmission in this system, an opportunistic network coding based cooperative information exchange ((ONCIE)-I-2) scheme was presented. Qualitative analysis and extensive simulations demonstrate the effectiveness and efficiency of (ONCIE)-I-2.

关键词： Payload-Distributed Communication Satellite System Cooperative Information Exchange opportunistic network coding Scheduling Transmission Efficiency

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