文档介绍：EDGE培训交流
内容
EDGE概念
GPRS/EGPRS的相关功能
EDGE/EGPRS的升级
PCU与Gb口的配置
EDGE概念
EDGE = Enhanced Data rates for Global Evolution
EDGE + GPRS=EGPRS
EDGE +GSM=ECSD
EDGE + GSM phase2+ = HSCSD
GPRS and EGPRS Modulations
I
Q
(0,1,1)
(1,1,0)
(1,0,1)
(0,0,0)
(0,0,1)
(1,1,1)
(1,0,0)
(0,1,0)
I
Q
“1”
“0”
GPRSGMSK Modulation
EDGE GPRS (EGPRS):8PSK Modulation
“1 bit per symbol”
“3 bits per symbol”
10
20
30
40
50
60
0
MCS1
MCS2
MCS3
MCS4
MCS5
MCS6
MCS7
MCS8
MCS9
CS1
CS2
CS3
CS4
GMSK 调制
8PSK 调制

kbps
GPRS
EGPRS
Standardized improvement I - EDGE 解码机制
I
MCS-1
MCS-2
MCS-3
MCS-4
MCS-5
MCS-6
MCS-7
MCS-8
MCS-9
22oct
28oct
37oct
44oct
56oct
74oct
2x56oct
2x68oct
2x74oct
C
B
A
C
B
A
B
A
A
GMSK
GMSK
GMSK
GMSK
8-PSK
8-PSK
8-PSK
8-PSK
8-PSK
EGPRS RLC Data Size
MCS-1
MCS-4
22oct
44oct
C
C
GMSK
GMSK
MCS-2
MCS-5
MCS-7
28oct
56oct
2x56oct
B
B
B
GMSK
8-PSK
8-PSK
MCS-3
MCS-6
MCS-8
MCS-9
37oct
74oct
2x68oct
2x74oct
A
A
A
A
GMSK
8-PSK
8-PSK
8-PSK
MCS-2
MCS-5
MCS-7
28oct
56oct
2x56oct
B
B
B
GMSK
8-PSK
8-PSK
MCS-3
MCS-6
MCS-8
MCS-9
37oct
74oct
2x68oct
2x74oct
A
A
A
A
GMSK
8-PSK
8-PSK
8-PSK
(22×8)×50×1
1000
GPRS/EGPRS无线网络功能
Link Quality Control Algorithm (LQC)
Quality of Service (QOS)
Network Assisted Cell Change ()
LQC EGPRS
Link Quality Control: Achieve highest throughput!
Link adaptation
- Estimate quality
- Choose coding scheme
- Re-segmentation is possible
- Use very little coding at first
- Send more coding if necessary
- Receiver uses bining
Incremental redundancy
Two ways to do it ...
LQC Further description
Link Adaptation
Incremental Redundancy
Receiver stores essfully decoded RLC data blocks
transmitter uses same MCS but distinct Puncturing Scheme
receiver uses old and new versions of RLC data units to perform decoding
adapting made easy by family grouping str