Cellular Digital Packet Data (CDPD) - Bnrg.cs.berkeley.edu ...

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Radio Resource Management• CDPD transmission is frequency agile, mobileacross adjacent cells (“cell transfers”)• In-band control, unlike AMPS cellular• Function provided include:– Allocating RF channel pair to CDPD service– Hopping to new RF channel pair, because of analog voicedemand or for CDPD channel load balancing– Controlling M-ES’s transmit power– Configuration information exchange» Cell ID, channel stream, service provider, home area» RF channels for CDPD use, channels to hop to» This information is periodically broadcast from BS– Admission control to channel stream18
M-ES Channel Hopping• Initiation Phase– Conditions for channel hopping are met» Detection of new color code» Loss of sync» Weak forward channel signal» Excessive block errors» OR “directed hop” message from the BS• Execution Phase– Uses information from previous configuration messages– E.g., “in-use” RF channels, “allocated” RF channels, “inuse”and “allocated” RF channels of adjacent cells• Termination Phase19
Page 1 and 2: CS 294-7: Cellular Digital PacketDa
Page 3 and 4: Cellular Digital Packet DataISInter
Page 5 and 6: CDPD Network ArchitectureColor Code
Page 7 and 8: CDPD Entities• Fixed End Systems
Page 9 and 10: CDPD Entities• Mobile Data Base S
Page 11 and 12: CDPD ProtocolsNetwork Layer DataNet
Page 13 and 14: CDPD Protocols• MAC Layer- Arbitr
Page 15 and 16: CDPD Protocols• Mobile Data Link
Page 17: Mobile Network RegistrationProtocol
Page 21 and 22: Network Layer Mobility:CDPD vs. Mob
Page 23 and 24: Network Layer Mobility:CDPD vs Mobi

Cellular Digital Packet Data (CDPD) - Bnrg.cs.berkeley.edu ...

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