index_B

B

Background class, 53

Base station controllers (BSCs), 12

defined, 12

PCU at, 85, 88

Base station subsystem (BSS), 10, 12

addressing, 279

architecture, 83-88

downlink power control and, 119

elements, 12

functions, 12

GPRS, 64, 83-88

MSC communication, 13

packet flow context, 100-101, 306-7

PCU, 83-86

signaling plane, 86-88

transmission plane, 86

Base transceiver stations (BTSs), 4

beacon channel, 8

identity code (BSIC), 41

PCU at, 84-85, 86, 87

performances , 35

power control mode, 120

transceiver (TRX), 34, 35

types of, 12

Beacon channel, 8

Bearer channel (BC), 275

Bearer services, 8-9

categories, 8-9

defined, 8

See also GSM

Block check sequence (BCS), 111, 176

Block error rate (BLER)

defined, 130-31

performance, 162-63, 165

Blocking

BVC procedure, 304-5

characteristics, 135

example procedure, 288

of NS-VC, 288

procedure, 288-89

procedure initiated by, 288

unblocking and, 289, 304-5

Broadcast channels (BCHs)

list of, 19

mapping, 23

transmission, 16

Broadcast control channel (BCCH), 17

allocation (BA) list, 44

carrier frequency, 45

information monitoring, 184-85

SI messages, 182-84

use of, 184

Broadcast information management, 182-89

broadcast information acquisition, 184-87

frequency parameters, 187-89

SI message scheduling, 182-84

BSS GPRS protocol (BSSGP), 65, 102-3, 291-316

defined, 291

flow control procedure, 300-303

GMM and, 292

LLC and, 292

PDU summary, 307-9

position, 103

principle, 102-3

service model, 292

virtual connections (BVCs), 278

See also Base station subsystem (BSS)

BSSGP virtual connections (BVCs), 278

blocking/unblocking procedure, 304-5

bucket parameter, 314, 315

defined, 304

management, 304-6

reset procedure, 305-6

state transition, 304

See also BVC establishment

BSS packet flow context, 306-7

creation, 306-7

defined, 100-101

deletion, 307

modification, 307

modification/deletion procedure illustration, 308

See also Base station subsystem (BSS)

Buffer management, 371-80

buffer usage examples (LLC layer to SNDCP layer), 375-80

buffer usage examples (SNDCP layer to LLC layer), 372-75

from LLC layer to SNDCP layer, 378, 379

strategy, 372

Burst formats, 28-29, 32-33

access bursts (ABs), 32, 33

frequency correction bursts (FBs), 32, 33

normal bursts (NBs), 28-29, 32

synchronization bursts (SBs), 32, 33

BVC establishment, 309-11

illustrated , 310

procedure, 309-11

See also BSSGP virtual connections (BVCs)

BVC-UNBLOCK-ACK message, 305