A Comparative study on Handoff Algorithms for GSM and CDMA Cellular Networks

Abstract

The GSM, CDMA cellular systems are most trendy 2G and 3G digital cellular telecommunications systems, which is widely used throughout the world. These systems have many advantages such as high security, higher quality of call transmission over the long distances, low transmitted power, and enhanced capacity with more efficient utilization of the frequency spectrum. With these advantages these cellular systems have attracted more subscribers with more attention in the field of mobile communications. One of the most attractive features of cellular system is handoff which is a continuation of an active call when the mobile is moving from one cell to another without disconnecting the call. Usually, continuous service is achieved by efficiently designed handoff algorithms. So, efficient handoff algorithms are necessary for enhancing the capacity and QoS of cellular system. In this paper, the handoff analysis for GSM, CDMA cellular networks are done under various propagation models. Various handoff algorithms of GSM are described and also a novel received signal strength (R SS ) based GSM handoff algorithm with adaptive hysteresis is analyzed. CDMA Soft handoff algorithm is analyzed and effective soft handoff parameters are estimated for better performance. The Comparison of handoff algorithms is studied based on results. Keyword:CDMA GSM Hard handoff R SS Soft handoff

Authentication Comparison of Telecommunications Technology Using A3, A8, A5 and Rijndael Algorithms

“…Telekomunikasi adalah teknik pengiriman atau penyampaian informasi dari suatu tempat ke tempat lain, sedangkan sebuah sistem telekomunikasi selular adalah komunikasi antar pesawat di mana salah satu pesawat bergerak atau berpindah lokasi dengan menggunakan sistem komunikasi tanpa kabel (wireless) [1] [2] [3] [4]. Teknologi telekomunikasi merupakan salah satu teknologi yang berkembang dengan sangat cepat, dimulai dengan layanan 1G sampai dengan 4G seperti yang ditunjukkan pada gambar 1. dan tabel 1 [3] [4] [5].…”

“…Fasilitas kordinasi seluruh frekuensi melalui base-station base station. Sistem CDMA menyediakan soft hand-off dari satu base-station ke base-station lainnya sebagai sebuah roaming telepon bergrak dari sel ke sel, melakukan soft handoff dikarenakan semua sistem menggunakan frekuensi yang sama [1]. Fungsi spread-spectrum dan kekuatan kendali yang memperbesar kapasitas panggil CDMA mengakibatkan bandwith yang cukup untuk bermacam-macam layanan data multimedia, dan skema soft hand-off menjamin: Tidak hilangnya data, meningkatkan kualitas suara, memperbaiki karakteristik cakupan yang dapat menurunkan jumlah sel, meningkatkan privacy dan security, menyederhanakan perencanaan sistem, memerlukan daya pancar yang lebih rendah, sehingga waktu bicara ponsel dapat lebih lama, mengurangi interferensi pada sistem lain, lebih tahan terhadap multipath, dapat dioperasikan bersamaan dengan teknologi lain (misal AMPS (Advanced Mobile Phone Service)).…”

A comparitive study on handover probability analysis for future HetNets

“…In the literature, most of the handoff algorithms are designed between similar networks which are based on Received Signal Strength (RSS) e.g GSM to GSM or CDMA to CDMA [4,5]. Various vertical handoff algorithms are observed and designed based on area of application and user requirements [6].…”

Novel Technique for Comprehensive Noise Identification and Cancellation in GSM Signal

“…Ruippo et al [28] have presented a study that emphasize on developing an oscillator that is controlled by voltage with highly less amount of phase noises operating at critical frequencies of GSM signals. Neeraja and Rao [29] have presented the comparative research for CDMA and GSM cellular networks over Handoff algorithm and the research is found helpful in improving cellular service. In Xie et al [30] explained the data transmission mechanism based on the measurement acquired from railway based GSM, i.e., GSM-R and concluded that this work could be considered for theoretical researches.…”