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This paper presents a routing protocol called Load Distributed Mesh Routing (LDMR) that is developed for Wireless Mesh Network (WMN) with IEEE 802.11 standard. The LDMR protocol decides on the potential next hop nodes based on a quadrant and distance information. Then, the Next Hop Forwarding (NHF) decision is used to select the best next hop nodes based on Packet Success Rate (PSR) and maximum velocity...
Recent technology advance in wireless sensor networks (WSNs) has enabled the growth of various applications that can assist or enhance existing systems. For instance, the technology provided by IEEE 802.15.4 protocol that operates in 2.4GHz ISM band is suitable to be used in many applications since it is a low cost and low power wireless communication. In this paper, we present a performance study...
A wireless sensor network is made up of battery operated devices that have sensing, processing and transmitting capabilities. The design constraint of a wireless sensor network is its network lifetime. In order to prolong the network lifetime, the sensor nodes must be able to use the minimal energy to transmit data to the base station. Hence, an efficient protocol is needed. One method to reduce the...
This paper presents a method of collaborative beamforming (CB) of organizing sensor node location in linear array for wireless sensor network (WSN). Appropriate Appropriate selection of active CB nodes and cluster are needed each time to perform CB in WSNs. The nodes are modeled in linear array organization in order to perform as a perform as a linear antenna array (LAA). This newly proposed proposed...
Cognitive radio-based wireless sensor network is the new paradigm in sensor network technology. It is a combination of the traditional sensor network and cognitive radio technology. Apparent challenge to this new sensor network outlook is the problem of energy efficiency. In this paper, we present the energy-efficient channel decision using reinforcement learning-based algorithm. The proposed algorithm...
Wireless mesh networks (WMNs) have gain attention from researchers in telecommunication engineering field due to its potential to provide low cost internet broadband access, wireless local area network coverage and network connectivity for stationary or mobile host. This network consists of multiple wireless routers that are used to relay each other's packet in multi-hop fashion. Hence, routing protocol...
Cognitive radio-based wireless sensor network is a new paradigm in sensor networks research. It is considered to revolutionize next generation sensor networks. Therefore, it is of paramount importance to develop an efficient channel access technique suitable for cognitive radio-based wireless sensor network. In this paper we have proposed a channel access framework for cognitive radio-based wireless...
In this paper, we present the end-to-end interference aware concept of Cognitive wireless mesh network (CWMN). CWMN is the leading upcoming technology with the advantage of cognitive radio (CR). We demonstrate that the end-to-end interference model has the ability to perform better from SINR base model. To enhance the utilization of the unused spectrum the channel selection strategy should have some...
The paper introduces proactive integrated handoff management (IHM) scheme in cognitive radio mobile ad hoc networks (CR-MANETs) through an established route. This scheme considers the primary user (PU) activity, secondary user (SU) mobility and channel heterogeneity in the spectrum handoff decision. To reduce the handoff delay, handoff thresholds are used. When the spectrum handoff cannot be done...
The current trend and demand of wireless services requires more efficient spectrum usage. With Cognitive Radio (CR) technology, spectrum efficiency will be increased by exploiting unused licensed or primary users spectrum. Spectrum sensing mechanism is one of the main cores in CR system. To combat the problems of shadowing, multipath fading, and hidden nodes, cooperative spectrum sensing has been...
In cognitive radio (CR), CR users or also known as secondary users (SUs) are considered as “visitors” to the licensed spectrum. During the case when the primary user (PU) claims the band of the spectrum that is occupied by the SU, the SU's ongoing call must be transferred to another unused spectrum band. The variation in spectrum band is called spectrum mobility. Spectrum mobility leads to a new handoff...
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