GPRS for Mobile Internet

D

Data link connection identifier (DLCI), 272 “73

Data terminal equipment (DTE), 384

DEACTIVATE PDP CONTEXT message, 345

Deactivation procedure, 345 “47

initiated by GGSN, 346 “47

initiated by MS, 345

initiated by SGSN, 345 “46

See also PDP context

Delay class, 52

DELETE PDP CONTEXT REQUEST message, 346

Demodulation algorithm, 162 “63

Differential encoding, 29 “30

Discard eligibility (DE), 274

Discontinuous reception . See DRX mode

Discrete memoryless channel (DMC), 142, 149

DL-UNITDATA message, 294

Downlink

adaptation, 267

multiplexing, 259 “60

scheduler, 260

signaling failure, 207 “8

Downlink power control, 119 “23

for block addressed to different mobiles, 120

BSS and, 119

mode A, 120 “21

mode B, 121 “22

operations, 119

parameters, 123

power reduction, 120, 122

See also Power control

Downlink signaling failure counter (DSC), 207, 208

Downlink TBF, 78, 208

ACK/NACK request period, 262 “64

established, uplink TBF establishment and, 224 “25

modification, 235

release, 247 “48

RLC data block transfer during, 243 “44

Downlink TBF establishment, 229 “35

on CCCH, 229 “31

with initial TA computation, 232

initial TA problem, 230 “31

on PCCCH, 231 “33

with uplink already established, 233 “35

Downlink transfer procedure, 311 “13

bucket leak rate, 313

bucket size , 312

cell reselection during, 313 “16

illustrated , 312

interruption, 315

LLC frames during, 314

DRX mode, 44, 200 “206

battery lifetime and, 200

PAGING_GROUP definition, 202 “6

(P)CCCH_GROUP definition, 200 “202

Dynamic allocation, 80 “81

extended, 81 “82

of PBCCH/PCCCH, 256 “57

principle, 80

See also Allocation

Dynamic link adaptation, 265 “68

algorithm, 267 “68

downlink, 267

initial coding scheme determination, 268

metrics, 266

uplink, 267