نتایج جستجو برای: handoff
تعداد نتایج: 2490 فیلتر نتایج به سال:
In Wireless Mobile Cellular Networks, users usually move between heterogeneous networks. In this type of environment, handoff procedure algorithm, handoff decision and its management is very important issue. Wireless Mobile Cellular Network supports the handoff process for users between various wireless technologies such as WLAN, CDMA and modern 3G networks. Heterogeneous networks are integrate...
The next generation Wireless network (NGWNs) allows the mobile node to access in different wireless network for a high rate of services. Therefore, In future there will be a need to have decision algorithm to decide, which is the best network for a specific application that the user needs . In this paper we propose a vertical handoff decision algorithm to decide the “best network” interface and...
Due to rapid growth in IEEE 802.11 based Wireless Local Area Networks (WLAN), handoff has become a burning issue. A mobile station (MS) requires handoff when it travels out of the coverage area of its current access point (AP) and tries to associate with another AP. But handoff delays provide a serious barrier for such services to be made available to mobile platforms. Throughout the last few y...
The Handoff delay is one of the major problems in Wireless Network (WLN) that needs to be solved in order to allow time-critical and real-time applications run continuously during handoff. We have developed a fast handoff scheme called NodeScan (or MobileScan) to provide a novel use of channel scanning latency by employing open system authentication. This scheme comprises two steps: firstly a c...
In cellular networks, quantities such as number of handoff probability and handoff rate are very important parameters in the cellular system performance analysis. In previous literature, several techniques were introduced to evaluate these parameters; however, there are some limitations in the introduced techniques. In this paper, we approximate number of handoff probability and handoff rate in...
Handoff decisions are usually signal strength based because of simplicity and effectiveness. Apart from the conventional techniques, such as threshold and hysteresis based schemes, recently many artificial intelligent techniques such as Fuzzy Logic, Artificial Neural Network (ANN) etc. are also used for taking handoff decision. In this paper, an Artificial Neural Network based handoff algorithm...
In this paper, we apply fuzzy analytic hierarchy process (FAHP) method in the decision process of Cognitive Radio Networks (CRN) spectrum handoff. Based on the pre-determined target spectrum list model, considering the multiple indicators which influence the handoff performance, we designed a spectrum handoff method based on spectrum reservation strategy. Simulation results show that the algori...
The fiber-optic radio system was proposed to solve the cost problem of micro/picocell system. In this system, all channel elements in a system can be dynamically assigned when the SDS is used. In this paper, we analyzed the performance of soft handoff used as intergroup handoff in the CDMA based fiber-optic cellular system with SDS. Performance is evaluated in view of blocking and handoff refus...
This paper analyses the effects of training on the performance of neural network handoff algorithm in a micro-cellular environment. We first describe the neural network handoff decision algorithm as it is applied to the handoff scenario. Then we introduce the effects and performance of the number of training points used for the chosen algorithm. The performance criterion is the number and locat...
This work presents a multivariable adaptive spectrum handoff model for cognitive radio networks that allows improving secondary user's spectrum mobility from the intelligent selection of spectrum opportunities called MAPMFF. Four algorithms for decision making during a spectrum handoff, were developed with different approaches, fuzzy, feedback statistics, predictive and multichannel, which make...
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