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Titolo:
Modeling of static and dynamic guard channel schemes for mobile transactions
Autore:
Chen, GC; Lee, SY;
Titolo Testata:
IEICE TRANSACTIONS ON INFORMATION AND SYSTEMS
fascicolo: 1, volume: E84D, anno: 2001,
pagine: 87 - 99
SICI:
0916-8532(200101)E84D:1<87:MOSADG>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
RADIO TELEPHONE SYSTEMS; PERFORMANCE ANALYSIS; NETWORKS; LOCKING;
Keywords:
mobile transactions; guard-channel schemes; forced termination;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Engineering, Computing & Technology
Citazioni:
18
Recensione:
Indirizzi per estratti:
Citazione:
G.C. Chen e S.Y. Lee, "Modeling of static and dynamic guard channel schemes for mobile transactions", IEICE T INF, E84D(1), 2001, pp. 87-99

Abstract

There are more and more information services provided on the wireless networks. Due to long network delay of wireless links, transactions will be long-lived transactions. In such a situation, the occurrence of handoff is inevitable, and thus a wireless link is held by a mobile unit crossing cell boundaries might be forced to terminate. It is undesirable that an active transaction is forced to terminate. A queueing scheme has been proposed to solve the problem of forced termination of transactions in our previous research. However, when 2PL protocol is employed, suspending an active transaction will elongate the lock holding time and thus degrade the system performance. In this paper, we propose two guard channel schemes (GCS), static and dynamic, to reduce the probability of forced termination of transactions. Indynamic GCS, the number of channels reserved in a base station is dynamically assigned according to the number of transaction calls which may handoffto this cell while the number of guard channels is fixed in static GCS. Ananalytic model based on Markov chain is derived to evaluate the system performance. The correctness of this model is verified by simulation. The experimental results show that a significant improvement is achieved by using the dynamic GCS.

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Documento generato il 04/04/20 alle ore 21:32:51