caa a22 4500 477088945 CHVBK 20180405111511.0 cr unu---uuuuu 170330e19960101xx s 000 0 eng 10.1007/BF02106661 doi (NATIONALLICENCE)springer-10.1007/BF02106661 Giner Vicente Departamento de Matemática Aplicada y Telemática, UPC, Campus Nord, Módulo C3, UPC Gran Capitán S/N, 08034, Barcelona, Spain aut An approximate analysis of TDMA out-of-slot random access protocols for microcellular mobile communications [Elektronische Daten] [Vicente Giner] In this paper, out-of-slot random access protocols for voice services that operate in microcellular environment are studied and simulated. The bearer service is assumed to be structured as time division multiple access/frequency division multiple access/frequency division duplex (TDMA/ FDMA/FDD). According to a stratification of information flow ascall, talkspurt, andpacket, the protocols are implemented at the talkspurt level. During a call, talkspurts generate a stream of packets. Each talkspurt has to reserve a voice time slot with a special control packet sent in a dedicate control slot (out of slot signaling). After a successful access, a voice slot is assigned for the duration of the talkspurt. This work concentrates on the out of slot random access method. When a transition from the idle state to the active state occurs, a voice terminal starts generating a talkspurt. Access for a voice slotV is then initiated via a dedicated control slotC. The time spent in gaining aV slot depends on the kind of random access protocol used in theC slots. Once the access reservation phase is successful, the talkspurt starts the second phase of information transmission in a freeV slot. If allV slots are occupied by other talkspurts, the new talkspurt is queued until aV slot becomes free. If the sum of the access and queueing times exceeds a thresh-old, a portion of the talkspurt is clipped. In our work we define an analytical model to evaluate the percentage of clipped voice packets. Simulations validate the analytical model. Plenum Publishing Corporation, 1996 Out-of-slot nationallicence wireless nationallicence contention nationallicence random access nationallicence International Journal of Wireless Information Networks Kluwer Academic Publishers-Plenum Publishers 3/1(1996-01-01), 41-53 1068-9605 3:1<41 1996 3 10776 https://doi.org/10.1007/BF02106661 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02106661 text/html Onlinezugriff via DOI NATIONALLICENCE 100 1- Giner Vicente Departamento de Matemática Aplicada y Telemática, UPC, Campus Nord, Módulo C3, UPC Gran Capitán S/N, 08034, Barcelona, Spain aut NATIONALLICENCE 773 0- International Journal of Wireless Information Networks Kluwer Academic Publishers-Plenum Publishers 3/1(1996-01-01), 41-53 1068-9605 3:1<41 1996 3 10776 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer