A --------------------------------------------------------------------------------------
Access Channel
A Reverse CDMA Channel usedby mobile stations for communicating to the base station. The
Access Channel is used for short signaling message exchanges, such as call originations,
responses to pages, and registrations. The Access Channel is a slotted random access channel.
Access Channel Preamble
The preamble of an access probe consisting of a sequence of
all-zero frames that is sent at the 4800 bps rate.
Access Probe
One Access Channel transmission consisting of a preamble and a message.
The transmission is an integer number of frames in length and transmits one Access .
Access Probe Sequence
A sequence of one or more access probes on the Access Channel.
Additional Preamble
Pilot Channel prior to transmitting on the Enhanced Access Channel or the Reverse Common Control Channel.
AWGN
Additive White Gaussian Noise Auxiliary Pilot Channel. An unmodulated, direct-sequence spread spectrum signal 18 transmitted continuously by a CDMA base station. An auxiliary pilot channel is required for forward link spot beam and antenna beam forming applications, and provides a phase reference for coherent demodulation of those forward link CDMA channels associated with
the auxiliary pilot.
Auxiliary Transmit Diversity Pilot Channel
A transmit diversity pilot channel associated with an auxiliary pilot channel. The auxiliary pilot channel and the auxiliary transmit diversity pilot channel provide phase references for coherent demodulation of those forward link CDMA channels associated with the auxiliary pilot and that employ transmit diversity.
B ---------------------------------------------------------------------------------------
Bad Frame
A frame classified with insufficient frame quality, or, for Radio Configuration
a 9600 bps primary traffic only frame with bit errors. See also Good Frame
Band Class.
Base Station
A fixed station used for communicating with mobile stations. Upon the context, the term base station may refer to a cell, a sector within a cell, or other part of the wireless system.
Basic Access Mode
A mode used on the Enhanced Access Channel where a mobile station transmits an Enhanced Access Channel preamble and Enhanced Access data in a method similar to that used on the Access Channel.
Broadcast Control Channel
A code channel in a Forward CDMA Channel used for 1 transmission of control information and pages from a base station to a mobile station.
C ---------------------------------------------------------------------------------------
Candidate Frequency
The frequency for which the base station specifies a search set, when searching on other frequencies while performing mobile-assisted handoffs.
CDMA Cellular System
The entire system supporting Domestic Public Cellular Service operation.
CDMA Channel
The set of channels transmitted between the base station and the mobile
stations within a given CDMA frequency assignment. See also Forward CDMA Channel and Reverse CDMA Channel.
CDMA Channel Number
An 11-bit number corresponding to the center of the CDMA frequency assignment.
CDMA Frequency Assignment
A 1.23 or 3.69 MHz segment of spectrum. The center of a CDMA frequency assignment is given by a CDMA Channel Number.
CDMA PCS System
The entire system supporting Personal Communications Services as
embraced by this Standard.
CDMA Preferred Set
The set of CDMA channel numbers in a CDMA system corresponding to frequency assignments that a mobile station will normally search to acquire a CDMA Pilot Channel. For CDMA cellular systems, the primary and secondary channels comprise the CDMA Preferred Set.
Chip Rate
Equivalent to the spreading rate of the channel. It is either 1.2288 Mcps or 3.6864 Mcps.
Code Channel
A subchannel of a Forward CDMA Channel or Reverse CDMA Channel.
Each subchannel uses an orthogonal Walsh function or quasi-orthogonal function.
Code Division Multiple Access (CDMA)
A technique for spread-spectrum multiple-access digital communications that creates channels through the use of unique code sequences.
Code Symbol
The output of an error-correcting encoder. Information bits are input to the
encoder and code symbols are output from the encoder.
Common Assignment Channel
A forward common channel used by the base station to acknowledge a mobile station accessing the Enhanced Access Channel, and in the case of
Reservation Access Mode, to transmit the address of a Reverse Common Control Channel and associated Common Power Control Subchannel.
Common Power Control Channel
A forward common channel which transmits power control bits (i.e., common power control subchannels) to multiple mobile stations. The Common Power Control Channel is used by mobile stations operating in the Power Controlled Access Mode, when operating in the Reservation Access Mode, or when
operating in the Designated Access Mode.
Common Power Control Group
A 1.25, 2.5, or 5 ms interval on the Common Power Control Channel which carries power control information for multiple mobile stations.
Common Power Control Subchannel
A subchannel on the Common Power Control Channel used by the base station to control the power of a mobile station when operating in the Power Controlled Access Mode on the Enhanced Access Channel or when operating in the Reservation Access Mode or the Designated Access Mode on the Reverse Common.
Convolutional Code
A type of error-correcting code. A code symbol can be considered as
the convolution of the input data sequence with the impulse response of a generator function.
Cyclic Redundancy Code (CRC)
A class of linear error detecting codes which generate parity check bits by finding the remainder of a polynomial division. See also Frame Quality Indicator.
D ---------------------------------------------------------------------------------------
Data Burst Randomizer
The function that determines which power control groups within
a frame are transmitted on the Reverse Fundamental Channel with Radio Configurations and when the data rate is lower than the maximum rate for the radio configuration. The data burst randomizer determines, for each mobile station, the pseudorandom position of the transmitted power control groups in the frame while guaranteeing that every modulation symbol is transmitted exactly once.
dBm
A measure of power expressed in terms of its ratio (in dB) to one milliwatt.
dBm/Hz
A measure of power spectral density. The ratio, dBm/Hz, is the power in one Hertz of bandwidth, where power is expressed in units of dBm.
Deinterleaving
The process of unpermuting the symbols that were permuted by the
interleaver. Deinterleaving is performed on received symbols prior to decoding.
Designated Access Mode
A mode of operation on the Reverse Common Control Channel where the mobile station responds to requests received on the Forward Common Control Channel.
Direct Spread
A CDMA mode in the International Telecommunications Union IMT-2000
family of standards.
Discontinuous Transmission (DTX)
A mode of operation in which a base station or a mobile station switches its transmitter or a particular code channel on and off autonomously. For the case of DTX operation on the Forward Dedicated Control Channel, the Forward Power Control Subchannel is still transmitted.
E ---------------------------------------------------------------------------------------
E b /N t
The ratio in dB of the combined received energy per bit to the effective noise power spectral density.
E c /I 0
The ratio in dB between the pilot energy accumulated over one PN chip period (Ec) to the total power spectral density (I0) in the received bandwidth.
Effective Isotropically Radiated Power (EIRP)
The product of the power supplied to the antenna and the antenna gain in a direction relative to an isotropic antenna.
Effective Radiated Power (ERP)
The product of the power supplied to the antenna and its gain relative to a half-wave dipole in a given direction.
Electronic Serial Number (ESN)
A 32-bit number assigned by the mobile station manufacturer, uniquely identifying the mobile station equipment.
Encoder Tail Bits
A fixed sequence of bits added to the end of a block of data to reset the convolutional encoder to a known state.
Enhanced Access Channel
A reverse channel used by the mobile for communicating to the base station. The Enhanced Access Channel operates in the Basic Access Mode, Power
Controlled Access Mode, and Reservation Access Mode. It is used for transmission of short messages, such as signaling, MAC messages, response to pages, and call originations. It can also be used to transmit moderate-sized data packets.
Enhanced Access Channel Preamble
A non-data bearing portion of the Enhanced Access probe sent by the mobile station to assist the base station in initial acquisition and channel estimation.
Enhanced Access Data
The data transmitted while in the Basic Access Mode or Power Controlled Access Mode on the Enhanced Access Channel or while in the Reservation
Access Mode on a Reverse Common Control Channel.
Enhanced Access Header
A frame containing access origination information transmitted immediately after the Enhanced Access Channel preamble while in the Power Controlled
Access Mode or Reservation Access Mode.
Enhanced Access Probe
One Enhanced Access Channel transmission consisting of an Enhanced Access Channel preamble, optionally an Enhanced Access header, and optionally
Enhanced Access data.
Enhanced Access Probe Sequence
A sequence of one or more Enhanced Access probes on the Enhanced Access Channel. See also Enhanced Access Probe.
F ---------------------------------------------------------------------------------------
Forward CDMA Channel
A CDMA Channel from a base station to mobile stations. The Forward CDMA Channel contains one or more code channels that are transmitted on a
CDMA frequency assignment using a particular pilot PN offset.
Forward Common Control Channel
A control channel used for the transmission of digital control information from a base station to one or more mobile stations.
Forward Error Correction
A process whereby data is encoded with convolutional or turbo codes to assist in error correction of the link.
Forward Fundamental Channel
A portion of a Forward Traffic Channel which carries a combination of higher-level data and power control information.
Forward Pilot Channel
An unmodulated, direct-sequence spread spectrum signal transmitted continuously by each CDMA base station. The Pilot Channel allows a mobile
station to acquire the timing of the Forward CDMA Channel, provides a phase reference for coherent demodulation, and provides means for signal strength comparisons between base stations for determining when to handoff.
Forward Power Control Subchannel
A subchannel on the Forward Fundamental Channel or Forward Dedicated Control Channel used by the base station to control the power of a
mobile station when operating on the Reverse Traffic Channel.
Forward Supplemental Channel
Traffic Channel which operates in conjunction with a Forward Fundamental Channel or a Forward Dedicated Control Channel in that Forward Traffic Channel to provide higher data rate services, and on which higher-level data is transmitted.
Forward Traffic Channel
One or more code channels used to transport user and signaling traffic from the base station to the mobile station. See Forward Fundamental Channel,
Forward Dedicated Control Channel, Forward Supplemental Channel, and Forward Supplemental Code Channel.
Fractional Preamble
A preamble in a sequence sent on the Reverse Pilot Channel prior to
transmitting on the Enhanced Access Channel or the Reverse Common Control Channel.
Frame
A basic timing interval in the system. For the Sync Channel, a frame is 26.666...
ms long. For the Access Channel, the Paging Channel, the Broadcast Control Channel, the Forward Supplemental Code Channel, and the Reverse Supplemental Code Channel, frame is 20 ms long. For the Forward Supplemental Channel and the Reverse Supplemental Channel, a frame is 20, 40, or 80 ms long. For the Enhanced Access Channel, the Forward Common Control Channel, and the Reverse Common Control Channel, a frame is 5, 10, or 620 ms long. For the Forward Fundamental Channel, Forward Dedicated Control Channel, Reverse Fundamental Channel, and Reverse Dedicated Control Channel, a frame is 5 or 20 8ms long. For the Common Assignment Channel, a frame is 5 ms long. Frame Offset. A time skewing of Forward Traffic Channel or Reverse Traffic Channel as a bad frame.
H ---------------------------------------------------------------------------------------
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.
L ---------------------------------------------------------------------------------------
Long Code Mask
A 42-bit binary number that creates the unique identity of the long code.
M ---------------------------------------------------------------------------------------
MAC Layer
Medium Access Control Layer.
Maximal Length Sequence (m-Sequence)
A binary sequence of period 2 n - 1, n being a positive integer, with no internal periodicities. A maximal length sequence can be generated by a tapped n-bit shift register with linear feedback.
MC
See Multi-Carrier.
Mcps
Megachips per second (10 6 chips per second).
Mean Input Power
The total received calorimetric power measured in a specified bandwidth at the antenna connector, including all internal and external signal and noise sources.
Mean Output Power
The total transmitted calorimetric power measured in a specified
bandwidth at the antenna connector when the transmitter is active. MHz. Megahertz (10 6 Hertz).
Mobile Station
A station that communicates with the base station.
Mobile Station Class
Mobile station classes define mobile station characteristics such as slotted operation and transmission power.
Mobile Switching Center (MSC)
A configuration of equipment that provides cellular radiotelephone service.
Modulation Symbol
The input to the signal point mapping block and the output of the interleaver or the sequence repetition block, if present.
Multi-Carrier
A CDMA mode in the International Telecommunications Union IMT-2000 family of standards. The mode uses N (N ! 1) adjacent 1.2288 Mcps direct-sequence spread RF carriers on the Forward CDMA Channel and a single direct-sequence spread RF carrier
on the Reverse CDMA Channel.
ms
Millisecond (10 -3 second).
MSB
Most significant bit.
N ---------------------------------------------------------------------------------------
ns
Nanosecond (10 -9 second).
O ---------------------------------------------------------------------------------------
Orthogonal Transmit Diversity (OTD)
A forward link transmission method which distributes forward link channel symbols among multiple antennas and spreads the symbols with a unique Walsh or quasi-orthogonal function associated with each antenna. OTD. See orthogonal transmit diversity.
P ---------------------------------------------------------------------------------------
Paging Channel
A code channel in a Forward CDMA Channel used for transmission of
control information and pages from a base station to a mobile station.
Paging Channel Slot
An 80 ms interval on the Paging Channel. Mobile stations operating in the slotted mode are assigned specific slots in which they monitor messages from the base station.
PCS System
Personal Communications Services System.
Personal Communications Services System
A configuration of equipment that provides PCS radiotelephone services.
Personal Communications Services (PCS)
A family of mobile and portable radio communications services for individuals and businesses that may be integrated with a variety of competing networks. Broadcasting is prohibited and fixed operations are to be ancillary to mobile operations.
Physical Layer
The part of the communication protocol between the mobile station and the base station that is responsible for the transmission and reception of data. The physical layer in the transmitting station is presented a frame and transforms it into an over-the-air waveform. The physical layer in the receiving station transforms the waveform back into a frame.
Pilot Channel
An unmodulated, direct-sequence spread spectrum signal transmitted by a
CDMA base station or mobile station. A pilot channel provides a phase reference for coherent demodulation and may provide a means for signal strength comparisons between base stations for determining when to handoff.
Pilot PN Sequence
A pair of modified maximal length PN sequences used to spread the Forward CDMA Channel and the Reverse CDMA Channel. Different base stations are identified by different pilot PN sequence offsets.
Pilot PN Sequence Offset Index
The PN offset in units of 64 PN chips of a pilot, relative to the zero offset pilot PN sequence.
Pseudonoise Sequence
A periodic binary sequence. Power Control Bit. A bit sent on the Forward Power Control Subchannel, Reverse Power Control Subchannel, or Common Power Control Subchannel to signal the mobile station or base station to increase or decrease its transmit power.
Power Control Group
A 1.25 ms interval on the Forward Traffic Channel, the Reverse.
Power Up Function
A method by which the mobile station increases its output power to 37
support location services.
Primary CDMA Channel
A pre-assigned channel in a CDMA Cellular System for
Spreading Rate 1 used by the mobile station for initial acquisition.
Primary Paging Channel
The default code channel (code channel 1) assigned for paging on a CDMA Channel.
Primary Reverse Power Control Subchannel
A Reverse Power Control Subchannel used to control the Forward Dedicated Control Channel or Forward Fundamental Channel. Private Long Code. The long code characterized by the private long code mask. See also Long Code.
Private Long Code Mask
The long code mask used to form the private long code.
Public Long Code
The long code characterized by the public long code mask.
Public Long Code Mask
The long code mask used to form the public long code. The mask
contains a permutation of the bits of the mobile station's ESN, the TMSI, or the particular mask specified by the base station. The mask also includes the channel number when used for a Supplemental Code Channel. See also Private Long Code Mask and Long Code.
Punctured Code
An error-correcting code generated from another error-correcting code by
deleting (i.e., puncturing) code symbols from the encoder output.
Q ---------------------------------------------------------------------------------------
QPSK
Quadrature phase shift keying.
Quasi-Orthogonal Function
A function created by applying a quasi-orthogonal masking function to an orthogonal Walsh function.
Quick Paging Channel
An uncoded, spread, and On-Off-Keying (OOK) modulated spread spectrum signal sent by a base station to inform mobile stations operating in the slotted
mode during the idle state whether to receive the Forward Common Control Channel or the Paging Channel starting in the next Forward Common Control Channel or Paging Channel frame.
R ---------------------------------------------------------------------------------------
Radio Configuration
A set of Forward Traffic Channel and Reverse Traffic Channel transmission formats that are characterized by physical layer parameters such as data rates, modulation characteristics, and spreading rate.
Reservation Access Mode
A mode used on the Enhanced Access Channel and Reverse Common Control Channel where a mobile station transmits an Enhanced Access preamble and an Enhanced Access header in the Enhanced Access probe. The Enhanced Access data is transmitted on a Reverse Common Control Channel using closed loop power control.
Reverse CDMA Channel
The CDMA Channel from the mobile station to the base station. From the base station's perspective, the Reverse CDMA Channel is the sum of all mobile station transmissions on a CDMA frequency assignment.
Reverse Common Control Channel
A portion of a Reverse CDMA Channel used for the transmission of digital control information from one or more mobile stations to a base station. The Reverse Common Control Channel can operate in a Reservation Access Mode
or Designated Access Mode. It can be power controlled in the Reservation Access Mode or Designated Access Mode, and may support soft handoff in the
Reservation Access Mode.
Reverse Common Control Channel Preamble
A non-data bearing portion of the Reverse Common Control Channel sent by the mobile station to assist the base station in initial acquisition and channel estimation.
Reverse Dedicated Control Channel
A portion of a Radio Reverse Traffic Channel used for the transmission of higher-level data and control information from a mobile station to a base station.
Reverse Fundamental Channel
A portion of a Reverse Traffic Channel which carries higher-level data and control information from a mobile station to a base station.
Reverse Pilot Channel
An unmodulated, direct-sequence spread spectrum signal transmitted continuously by a CDMA mobile station. A reverse pilot channel provides a
phase reference for coherent demodulation and may provide a means for signal strength measurement.
Reverse Power Control Subchannel
A subchannel on the Reverse Pilot Channel used by the mobile station to control the power of a base station when operating on the Forward Traffic Channel.
Reverse Supplemental Channel
A portion of a Radio Configuration 3 through 6 Reverse Traffic Channel which operates in conjunction with the Reverse Fundamental Channel or the Reverse Dedicated Control Channel in that Reverse Traffic Channel to provide higher data rate services, and on which higher-level data is transmitted.
Reverse Traffic Channel Preamble
A non-data bearing portion of the Reverse Pilot Channel sent by the mobile station to aid the base station in initial acquisition and channel estimation for the Reverse Dedicated Control Channel and Reverse Fundamental Channel. RF Carrier. A direct-sequence spread RF channel. For the Forward CDMA Channel, the number of RF carriers is equal to the Spreading Rate; for the Reverse CDMA Channel, there is one RF carrier.
S ---------------------------------------------------------------------------------------
Secondary CDMA Channel
A pre-assigned channel in a CDMA Cellular System for Spreading Rate 1 used by the mobile station for initial acquisition. See also Primary CDMA Channel.
Secondary Reverse Power Control Subchannel
A Reverse Power Control Subchannel used to control a Forward Supplemental Channel. Serving Frequency. The CDMA frequency on which a mobile station is currently communicating with one or more base stations.
Slotted Mode
An operation mode of the mobile station in which the mobile station monitors only selected slots on the Paging Channel.
Sync Channel
A code channel in the Forward CDMA Channel which transports the synchronization message to the mobile station.
Sync Channel Superframe
An 80 ms interval consisting of three Sync Channel frames (each 26.666 ms in length).
System Time
System Time is synchronous to UTC time (except for leap seconds) and uses the same time origin as GPS time. All base stations use the same System Time (within a small error tolerance). Mobile stations use the same System Time, offset by the propagation delay from the base station to the mobile station.
T ---------------------------------------------------------------------------------------
TD
Transmit Diversity schemes, including OTD and STS. Time Reference. A reference established by the mobile station that is synchronous with the earliest arriving multipath component used for demodulation. Transmit Diversity Pilot Channel. An unmodulated, direct-sequence spread spectrum signal transmitted continuously by a CDMA base station to support forward link transmit diversity. The pilot channel and the transmit diversity pilot channel provide phase references for coherent demodulation of forward link CDMA channels which employ transmit diversity.
Traffic Channel, and the Reverse Pilot Channel
See also Power Control Bit. Power Controlled Access Mode. A mode used on the Enhanced Access Channel where a mobile station transmits an Enhanced Access preamble, an Enhanced Access header, and Enhanced Access data in the Enhanced Access probe using closed loop power control.
Turbo Code
A type of error-correcting code. A code symbol is based on the outputs of the
two recursive convolutional codes (constituent codes) of the Turbo code.
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., WWV, WWVH, LORAN-C.
V ---------------------------------------------------------------------------------------
Variable Data Rates
The operation of a Traffic Channel where the transmitter can change the data rate among a set of possible choices on a frame-by-frame basis.
Variable-rate Supplemental Channel
The operation of the Forward Supplemental Channel and the Reverse Supplemental Channel where the transmitter can change the data rate among a set of possible choices on a frame-by-frame basis.
W ---------------------------------------------------------------------------------------
Walsh Chip
The shortest identifiable component of a Walsh or quasi-orthogonal function.
There are N Walsh chips in one Walsh function where N is the order of the Walsh function.
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