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In order to achieve the improved blocking performance of wavelength routed WDM networks, wavelength conversion can be implemented at nodes. The paper evaluates the performance of the network in terms of blocking probability with and without wavelength conversion. The analysis and comparison for wavelength conversion and without wavelength conversion has been undertaken for static and dynamic traffic...
Cell phones and pocket PCs have burst-mode type integrated circuits, which for the majority of the time are in an idle state. For such circuits, it is acceptable to have leakage during the active mode. However, during the idle state it is extremely wasteful to have leakage, as power is unnecessarily consumed with no useful work being done. In this paper, we proposed a novel leakage reduction technique...
A Multi-bit output Linear Feedback Shift Register (MBO LFSR) based kernel (computational object) is proposed. This paper describes the results of a study on the required hardware components in the MBO LFSR kernel. The kernel provides an advantage of required programmability in computing hardware of a Software Defined Radio (SDR) along with the low power implementation in processing of digital wireless...
To overpass the speed gap between processor and main memory; cache memory is used. Cache memory is having hierarchical structure, including level 1 cache (L1), level 2 cache (L2) etc. Effective page replacement algorithm will result in effectual utilization of cache. L1 is having rich temporal locality while L2 is having poor temporal locality, thus same replacement algorithms for both the levels...
Access to the Internet and WWW is growing extensively, which results in heavy network traffic. To reduce the network traffic proxy server is used. Proxy server reduces the load of server. If the cache replacement algorithm of proxy server's cache is efficient then proxy server will be helpful to reduce the network traffic in more efficient manner. In this paper we are considering proxy server cache...
The Performance of IEEE 802.11 distributed coordination function (DCF), under ideal channel conditions degrades mainly due to packet collisions at MAC layer. However, studies reveal that MAC layer performance significantly reduces when wireless networks encounter channel fading at physical layer. Since fading results in burst errors, in addition to errors caused by collisions at MAC layer. In this...
Access to the internet and WWW is growing extensively, which results in heavy network traffic. To reduce the network traffic proxy server is used. Proxy server reduces the load of server. If the cache replacement algorithm of proxy server's cache is efficient then proxy server will be helpful to reduce the network traffic in more efficient manner. In this paper we are considering proxy server cache...
Soft handoff in CDMA cellular system increases system capacity as compared to hard handoff as interference is reduced by transmitting signals as lower power level. A CDMA cellular system involving integrated voice and data calls is considered in this paper. The developed model is based on priority reservation for handoff voice and data calls along with call queuing scheme for handoff data calls. Upper...
Processors speed is much faster than memory; to bridge this gap cache memory is used. This paper proposes a preeminent pair of replacement algorithms for Level 1 cache (L1) and Level 2 cache (L2) respectively for the matrix multiplication (MM) application. The access patterns of L1 and L2 are different, when CPU not gets the desired data in L1 then it goes to L2. Thus the replacement algorithm which...
The GPRS network has been well integrated in global system for mobile (GSM) network, the most dominant cellular standard, to accomplish efficient spectrum utilization for data traffic. It has become a popular service which carries critical business and social information of many subscribers. The issue of survivability for a GPRS network requires more investigation. This work introduces a new measure...
In CDMA cellular system, the coverage area of the cell is greatly influenced by soft handoff process. The variation in soft handoff coverage area can be taken as the parameter influencing the performance parameters of the CDMA cellular system. In this paper, an analytical model is developed and analyzed for the concerned target cell in CDMA cellular network. The model proposed in this paper is based...
In CDMA cellular networks the variation in soft handoff coverage area can be taken as the parameter influencing the performance of the system. In this paper, an analytical model is developed and analyzed for the concerned target cell in CDMA cellular network. The model proposed in this paper is for integrated data and voice services. It is based on reservation for handoff voice and data calls along...
In CDMA cellular system, the coverage area and cell capacity is greatly influenced by soft handoff process. The variation in soft handoff coverage area can be taken as the parameter influencing the performance parameters of the CDMA cellular system. In this paper, an analytical model is developed and analyzed for the concerned target cell in CDMA cellular network. The model proposed in this paper...
Wireless sensor network (WSN) is a distributed system which possesses time varying wireless connectivity without any infrastructural backbone. Scarce energy and computation power of individual nodes, unattended and harsh operation environment, self configuration after random deployment etc complexities are known characteristic features of a WSN. Despite aforesaid constraints WSN has been evolved as...
Survivability is one of many words which were coined as a measure of degree to which a system is able to provide critical services. Many definitions have been proposed but the precise definition of survivability is still being debated. Especially the available measures of survivability for cellular networks do not cover many inherent features simultaneously. Many measures has been used to describe...
The concept of performability takes into accounts both availability and performance of a system [1][2] and survivability is broadly defined as the degree to which a system is able to provide critical services [3]. The ideal survivability goal is to make a network failure imperceptible to the users by providing service continuity and minimizing network congestion. This paper addresses above issues...
The cellular mobile technology has been emerged astonishingly over the last decade. Global system for mobile (GSM) is most dominant among various cellular standard. It was developed in Europe and deployed in many parts of world. Now a day it carries critical business and social information of many subscribers thus proper quantification of quality of service must be done. In this work, survivability...
In order to accomplish efficient spectrum utilization for data traffic enhanced data rate over GSM evolution (EDGE) has been developed. It has been well integrated in GSM networks. The concept of incremental redundancy (IR) is used in EDGE for ARQ. It has 9 different data formats, called modulation and coding schemes (MCS), one of them is used depending upon IR. The data packets are sent via base...
The data traffic is burstier and has longer connection time as compared to voice traffic. Global System for Mobile (GSM) was developed to carry the voice traffic and it is not suitable for carrying data traffic. General packet radio service (GPRS) has been well integrated in the GSM networks to accomplish efficient spectrum utilization for data traffic. In uplink, users are required to reserve the...
The data traffic is burstier and has longer connection time as compared to voice traffic. Global system for mobile (GSM) was developed to carry the voice traffic and it is not suitable for carrying data traffic. General packet radio service (GPRS) has been well integrated in the GSM networks to accomplish efficient spectrum utilization for data traffic. Serving GPRS support node (SGSN) is the main...
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