microcells - Maxwell

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Fig. 3.16 TDMA digital control channel [1] • As with the voice channels, separate forward and reverse channels are needed. Normally there is one DCCH pair per cell, or per sector in a sectorized system. See Figure 3.16. • The total bit rate for a DCCH is one-third of the RF channel bit rate, or 44.6/3 =14.9 kb/s, compared with 10 kb/s for an ACCH.
Privacy and Security in Digital Cellular Radio Cellular Radio • Privacy is considerably improved in digital cellular radio compared to the analog system. • Even decoding it from digital to analog is not straightforward, due to the need for a vocoder. • However, obviously vocodeers are present in all digital cell phones, so a modified cell phone could do the job. • There is some encryption of the authorization information in the TDMA system, enough to make cell phone cloning and impersonation difficult.
Page 1 and 2: 3.6. Cell-Site Equipment • Traffi
Page 3 and 4: Fig. 3. 7 Cellular base station [1]
Page 5 and 6: • Fig. 3.8 Cellular radio system
Page 7 and 8: Traffic and Cell Splitting • The
Page 9 and 10: • Phone traffic is defined in erl
Page 11 and 12: Microcells, Picocelles and Repeater
Page 13 and 14: Fig. 3.9 Microcell site [1]
Page 15 and 16: • A microcell is often under the
Page 17 and 18: • The main cell site up-converts
Page 19 and 20: • Sometimes the problem is not ex
Page 21 and 22: 3.7. Fax and Data Communication Usi
Page 23 and 24: • The greater robustness results
Page 25 and 26: Cellular Digital Packet Data (CDPD)
Page 27 and 28: • When overhead is taken into acc
Page 29 and 30: • Recent advances in data compres
Page 31 and 32: • They lend themselves to time-an
Page 33 and 34: • In the last two lines of Table
Page 35 and 36: Fig. 10.14 TDMA frame [1] • Each
Page 37 and 38: • The data rate available for eac
Page 39: TDMA Control Channels • The IS-13
Page 43 and 44: Data Communication with Digital Cel
Page 45: References • [1] R. Blake, "wirel

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