microcells - Maxwell

More documents

Recommendations

Info

• Each cell has several radio transceivers (one per channel); usually one wideband power amplifier is used to provide the transmit power for all channels in a site (or sector, for sectorized system). • The site`s radio equipment is operated by a base station controller (BSC). • The base station controller takes care of the air interface: assigning channels and power levels, transmitting signaling tones, and so on. • The mobile switching centers (MSCs), also called mobile telephone switching offices (MTSOs), route calls along a private copper, fiber optic, or microwave network operated by the cellular service provider.
Traffic and Cell Splitting • The optimum size of a cell depends on the amount of traffic. • If all channels in a cell are busy, it is impossible for anyone to place a call to or from that cell. The user has to hang up and try again later. This situation is called call blocking and is obviously undesirable. • A more unpleasant situation occurs when a mobile phone moves into a cell that has all its channels busy. The attempt by the system to hand off the call to the new cell is frustrated by the lack of free channels, and the cell must be terminated, or dropped.
Page 1 and 2: 3.6. Cell-Site Equipment • Traffi
Page 3 and 4: Fig. 3. 7 Cellular base station [1]
Page 5: • Fig. 3.8 Cellular radio system
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 and 40: TDMA Control Channels • The IS-13
Page 41 and 42: Privacy and Security in Digital Cel
Page 43 and 44: Data Communication with Digital Cel
Page 45: References • [1] R. Blake, "wirel

microcells - Maxwell

Create successful ePaper yourself

Delete template?

Save as template?