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A Survey on Communication Protocols for Wireless Sensor Networks
Jang, Ingook,Pyeon, Dohoo,Kim, Sunwoo,Yoon, Hyunsoo Korean Institute of Information Scientists and Eng 2013 Journal of Computing Science and Engineering Vol.7 No.4
Improvements in wireless sensor network (WSN) technology have resulted in a large number of applications. WSNs have been mainly used for monitoring applications, but they are also applicable to target tracking, health care, and monitoring with multimedia data. Nodes are generally deployed in environments where the exhausted batteries of sensor nodes are difficult to charge or replace. The primary goal of communication protocols in WSNs is to maximize energy efficiency in order to prolong network lifetime. In this paper, various medium access control (MAC) protocols for synchronous/asynchronous and single/multi-channel WSNs are investigated. Single-channel MAC protocols are categorized into synchronous and asynchronous approaches, and the advantages and disadvantages of each protocol are presented. The different features required in multi-channel WSNs compared to single-channel WSNs are also investigated, and surveys on multi-channel MAC protocols proposed for WSNs are provided. Then, existing broadcast schemes in such MAC protocols and efficient multi-hop broadcast protocols proposed for WSNs are provided. The limitations and challenges in many communication protocols according to this survey are pointed out, which will help future researches on the design of communication protocols for WSNs.
A Survey on Communication Protocols for Wireless Sensor Networks
Ingook Jang,Dohoo Pyeon,Sunwoo Kim,Hyunsoo Yoon 한국정보과학회 2013 Journal of Computing Science and Engineering Vol.7 No.4
Improvements in wireless sensor network (WSN) technology have resulted in a large number of applications. WSNs have been mainly used for monitoring applications, but they are also applicable to target tracking, health care, and monitoring with multimedia data. Nodes are generally deployed in environments where the exhausted batteries of sensor nodes are difficult to charge or replace. The primary goal of communication protocols in WSNs is to maximize energy efficiency in order to prolong network lifetime. In this paper, various medium access control (MAC) protocols for synchronous/asynchronous and single/multi-channel WSNs are investigated. Single-channel MAC protocols are categorized into synchronous and asynchronous approaches, and the advantages and disadvantages of each protocol are presented. The different features required in multi-channel WSNs compared to single-channel WSNs are also investigated, and surveys on multi-channel MAC protocols proposed for WSNs are provided. Then, existing broadcast schemes in such MAC protocols and efficient multi-hop broadcast protocols proposed for WSNs are provided. The limitations and challenges in many communication protocols according to this survey are pointed out, which will help future researches on the design of communication protocols for WSNs.
EMBA: An Efficient Multihop Broadcast Protocol for Asynchronous Duty-Cycled Wireless Sensor Networks
Ingook Jang,Suho Yang,Hyunsoo Yoon,Dongwook Kim IEEE 2013 IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS Vol.12 No.4
<P>In this paper, we propose an efficient multihop broadcast protocol for asynchronous duty-cycled wireless sensor networks (EMBA) where each node independently wakes up according to its own schedule. EMBA adopts two techniques of the forwarder's guidance and the overhearing of broadcast messages and ACKs. A node transmits broadcast messages with guidance to neighbor nodes. The guidance presents how the node forwards the broadcast message to neighbor nodes by using unicast transmissions. This technique significantly reduces redundant transmissions and collisions. The overhearing of broadcast messages and ACKs helps to reduce the number of transmissions, thus it minimizes the active time of nodes. We implement EMBA and conventional protocols of ADB and RIMAC broadcast in ns-2 simulator to compare their performance. The simulation results show that EMBA outperforms ADB and RI-MAC broadcast in both sparse and dense networks. EMBA achieves lower message cost than the conventional protocols and significantly improves the energy efficiency in terms of both duty cycle and energy consumption.</P>
협업 작업 다중 에이전트 심층강화학습을 위한 Fairness 기반 시연 데이터 획득에 관한 연구
장인국(Ingook Jang),김성현(Seonghyun Kim),김현석(Hyunseok Kim),박찬원(Chan-Won Park),박준희(Jun Hee Park) 한국통신학회 2021 한국통신학회 학술대회논문집 Vol.2021 No.11
본 논문은 시연 데이터를 활용한 다중 에이전트 심층강화학습 수행 시 양질의 시연 데이터를 확보하기 위한 새로운 방법을 제안한다. 다중 에이전트 환경에서는 에이전트 간 이해충돌을 최소화하고 협업 작업의 보상을 최대화 하기 위해 에이전트 간 fairness를 고려할 필요가 있다. 제안 방법은 에이전트 간 fairness를 고려하여 협업 작업의 시연 데이터를 확보하고 이를 다중 에이전트 심층강화학습에 활용한다.
Jaeyoung Hong,Ingook Jang,Hanjin Lee,Suho Yang,Hyunsoo Yoon IEEE 2010 IEEE communications letters Vol.14 No.7
<P>This letter proposes a novel medium reservation MAC protocol that reduces both end-to-end delay and energy consumption for wireless sensor networks. MRMAC reduces end-to-end delay by informing the intended receiver of NPAT (next packet arrival time) and MRI (medium reservation information) to reserve the medium in advance. Through this medium reservation phase, following packets can be delivered with reduced delay in multihop streaming phase. A simulation shows that the result of the proposed protocol outperforms previous works.</P>
A novel routing protocol for cognitive radio networks with cooperation process
( Sunwoo Kim ),( Dohoo Pyeon ),( Ingook Jang ),( Hyunsoo Yoon ) 한국인터넷정보학회 2014 KSII Transactions on Internet and Information Syst Vol.8 No.11
Cognitive radio networks (CRNs) are composed of mobile users who can use multiple spectrum bands for communication. CRNs allow unlicensed users (called cognitive users) to efficiently utilize unused licensed spectrums without interfering with communications of licensed users (called primary users). The main goals of CRNs are to mitigate spectrum saturation and to improve spectrum utilization. This paper introduces state-of- the-art routing protocols for CRNs and addresses some limitations of these protocols. To resolve the limitations, we suggest a new research direction for routing protocols in CRNs. We implement our protocol to compare with the existing routing protocols for multi-hop CRNs. Our protocol shows good performance compared to the existing routing protocols in terms of network performance and PU protection.