LG VX5400, Service Manual

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Forward Traffic Channel. A code channel used to transport user and signaling traffic from the base station to the
mobile station.
A basic timing interval in the system. For the Access Channel, Paging Channel, and Traffic Channel, a frame is 20
ms long. For the Sync Channel, a frame is 26.666…ms long.
Frame Category. A classification of a received Traffic Channel frame based upon transmission data rate, the Frame
contents (primary traffic, secondary traffic, or signaling traffic), and whether there are detected error in the frame.
Frame Offset . A time skewing of Traffic Channel frames from System Time in integer multiples of 1.25 ms. The
maximum frame offset is 18..75 ms..
Frame Quality Indicator. The CRC check applied to 9600 bps and 4800 bps Traffic Channel frames.
Global Positioning System (GPS). A US government satellite system that provides location and time Information to
users. See Navstar GPS Space segment / Navigation User interfaces ICD-GPS-200 for Specifications.
Half Frame. A 10 ms interval on the paging Channel. Two half frames comprise a frame, the first half frame begins
at the same time as the frame.
Handoff. The of transferring communication with a station mobile station from one base station to another.
Hard Handoff. A handoff characterized by a temporary disconnection of the Traffic Channel. Hard handoffs Occur
when the mobile station is transferred between disjoint Active Sets, the CDMA frequency assignment changes, the
frame offset changes, or the mobile station is directed from a CDMA Traffic Channel to an analog voice channel, See
also Soft Handoff.
Hash Function. A function used by the mobile station to select one out of N available resource. The hash function
distributes the available resources uniformly among a random sample of mobile stations.
HLR. See Home Location Register.
Home Location Register (HLR). The location register to which a MIN is assigned for record purposes such as
subscriber information.
Home System. The Cellular system in which the mobile station subscribes for service.
Idle Handoff . The act of transferring reception of the Paging Channel from one bass station to another, when the
mobile station is in the Mobile Station Idle State.
Implicit Registration. A registration achieved by a successful transmission of an origination or page response on the
Access Channel.
Interleaving. The process of permuting a sequence of symbols.
kHz . Kilohertz (103 Hertz).
ksps. Kilo-symbols per second (103 symbols per second).
Layer 1 . See Physical Layer.
Layer 2 . Layer 2 provides for the correct transmission and reception of signaling messages, including partial
duplicate detection. See also Layering and Layer 3.
Layer 3 . Layer 3 provides the control of the Cellular telephone systems. Signaling messages originate and terminate
at layer 3. See also Layering and Layer 2.
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