GPRS for Mobile Internet

L

Layer-two tunneling protocol (L2TP), 386

Linearity, 165 “67

defined, 165

IP3, 166 “67

See also RF receivers

Link adaptation, 114 “15, 265 “68

algorithm, 267 “68

downlink, 267

initial coding scheme determination and, 268

metrics, 266

uplink, 267

Link integrity verification, 284 “85

example, 285

purpose, 284

Link management interface (LMI) protocol, 281

LLC, 66

BSSGP and, 292

discarded procedure, 300

format frame description, 358 “60

frames , 314, 315, 316, 360

layer operation control, 336 “38

service access point identifier (LLC SAPI), 339

user procedures between RELAY SAPs and, 292 “95

LLC layer, 356 “80

acknowledgment window mechanism, 360 “62

ciphering function, 358

data multiplexing, 362 “63

general description, 356

operations, 358

to SNDCP layer (buffer usage), 375 “80

SNDCP layer to (buffer usage), 372 “75

structure, 357

transmission mode support, 357

XID negotiation, 363

LLC PDUs

reassembly, from RLC data blocks, 239 “40

segmentation into RLC data blocks, 238 “39

transfer, in downlink, 292 “94

transfer, in uplink, 295

Load sharing, 290 “91

Location area code (LAC), 88

Location areas (LAs), 7, 88 “89

Location-management procedures, 351, 353

Location procedures, 327 “32

cell update, 328

combined RA and LA update, 330 “32

initiation, 327

normal RA update, 329 “30

RA update, 328 “29

updating, 98 “99

Logical channels, 16 “18

AGCH, 17

BCCH, 17, 44 “45, 182 “85

CBCH, 18

CCCH, 17 “18, 213 “16, 229 “31, 235 “37

combinations, summary, 25

dedicated control channels, 18

FACCH, 18, 22, 30

FCCH, 17

list of, 19

mapping, on 52- multiframe , 108 “11

mapping, onto physical channels, 18 “25

PCH, 17

purpose of, 19

RACH, 17

SACCH, 18, 21 “22

SCH, 17

SDCCH, 18, 22 “23

Logical link control. See LLC; LLC layer; LLC PDUs

Logical link entity (LLE), 362 “63