Table of Contents
Advertisement
KG70C
Unique Challenge-Response Procedure. An exchange of information between a mobile station
and a base station for the purpose of confirming the mobile station's identity. The procedure is initiated
by the base station and is characterized by the use of a challenge-specific random number(i.e.,
RANDU) instead of the random variable broadcast globally(RAND).
Unique Random Variable(RANDU). A 24-bit random number generated by the base station in
support of the Unique Challenge-Response procedure.
Universal Coordinated Time(UTC). An internationally agreed-upon time scale maintained by the
Bureau International de l'Heure(BIH) used as the time reference by nearly all commonly available time
and frequency distribution systems i.e., WWW, WWVH, LORAN-C, Transit, Omega, and GPS.
UTC. Universal Temps Coordine. See Universal Coordinated Time.
Voice Channel. See Analog Voice Channel.
Voice Mobile Attenuation Code(VMAC). A 3-bit field in the Extended Address Word commanding
the initial mobile power level when assigning a mobile station to an analog voice channel.
Voice Privacy. The process by which user voice transmitted over a CDMA Traffic Channel is a
afforded a modest degree of protection against eavesdropping over the air.
N
Walsh Chip. The shortest identifiable component of a Walsh function. There are 2
Walsh chips
in one Walsh function where N is the order of the Walsh function. On the Forward CDMA channel one
Walsh chip equals 1/1.2288MHz, or 813.802...ns. On the Reverse CDMA Channel, one Walsh chip
equals 4/1.2288MHz, or 3.255...㎲.
N
Walsh Function. One of 2
time orthogonal binary functions (note that the functions are orthogonal
after mapping '0' to 1 and '1' to –1).
Zone-Based Registration. An autonomous registration method in which the mobile station registers
whenever it enters a zone that is not in the mobile station's zone list.
㎲. Microsecond
68
Advertisement
Table of Contents
