1992_EJRNL_PP_J_-P_M_G__Linnartz_1.pdf
Terbatas Irwan Sofiyan
» ITB
Terbatas Irwan Sofiyan
» ITB
An analytical method for investigating
slotted ALOHA land-mobile networks is presented.
The probability of successful reception and
throughput is assessed for a single base station,
taking account of contending transmissions and
receiver noise. Receiver capture is assumed to
occur if the received signal power exceeds the joint
interference power by a certain margin, called the
receiver threshold. Rayleigh fading and UHF
groundwave propagation are considered. Results
are extended for a cellular network considering
the interference from packet transmissions in
other (co-channel) cells. It is seen that in packetswitched
cellular nets, frequency re-use distances
may be substantially smaller than in circuitswitched
(CW) telephony networks, where each
cell has to be safeguarded continuously from cochannel
interference. Moreover, a technique to
assess the throughput of ALOHA networks with
multiple, geographically-separated base stations is
presented and numerical results are given for
uniform Poisson-distributed packet transmissions
in the service area.