Title :
Capacity of digital cellular TDMA systems
Author :
Raith, Krister ; Uddenfeldt, Jan
Author_Institution :
Ericsson GE Mobile Commun. Inc., Research Triangle Park, NC, USA
fDate :
5/1/1991 12:00:00 AM
Abstract :
The capacity of digital TDMA (time-division multiple-access) systems is addressed. It is projected that capacity improvement will be of the order of 5-10 times that of analog FM without adding any cell sites. For example, the North American TIA (Telecommunication Industry Association) standard offers around 50 Erlang/km2 with a 3-km site-to-site distance. In addition, the TDMA principle allows a faster handoff mechanism (mobile assisted handoff), which makes it easier to introduce microcells with a cell radius of about 200 m. This gives substantial additional capacity gain beyond the 5-10 factor given above. TDMA makes it possible to introduce adaptive channel allocation (ACA) methods. ACA is a mechanism that provides efficient microcellular capacity. ACA also eliminates the need to plan frequencies for cells. It is concluded that the air-interface of digital TDMA cellular may be used to build personal communication networks
Keywords :
cellular radio; channel capacity; digital radio systems; radiotelephony; standards; time division multiple access; Telecommunication Industry Association; adaptive channel allocation; cell radius; cellular radio; digital TDMA standards; digital cellular TDMA; microcellular capacity; mobile assisted handoff; mobile radio capacity; personal communication networks; radiotelephony; time-division multiple-access; Channel allocation; Communication standards; Europe; GSM; Land mobile radio cellular systems; North America; Standardization; Telecommunication standards; Telephony; Time division multiple access;
Journal_Title :
Vehicular Technology, IEEE Transactions on
