OMF000001 Um Interface and Radio Channels ISSUE2.1 EMERSON EDUARDO RODRIGUES.ppt
EMERSONEDUARDORODRIG6
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Aug 29, 2024
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About This Presentation
EMERSON EDUARDO RODRIGUES
EMERSON EDUARDO RODRIGUES
EMERSON EDUARDO RODRIGUES
EMERSON EDUARDO RODRIGUES
EMERSON EDUARDO RODRIGUES
EMERSON EDUARDO RODRIGUES
EMERSON EDUARDO RODRIGUES
EMERSON EDUARDO RODRIGUES
EMERSON EDUARDO RODRIGUES
EMERSON EDUARDO RODRIGUES
EMERSON EDUARDO RODRIG...
Slide Content
www.huawei.com
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Um Interface and
Radio Channels
Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Um Interface and
Radio Channels
Page2Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Contents
1.Overview
2.Processing of Voice Signal
3.Radio Channel
Contents
1.Overview
2.Processing of Voice Signal
3.Radio Channel
Page3Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Radio Interface
Another MSC
HLR/AUC
SMC
PSTN
ISDN
OMC
MS
Um
MS
A-bis
BSC
A
BTS
MSC/VLR
Radio Interface
Another MSC
HLR/AUC
SMC
PSTN
ISDN
OMC
MS
Um
MS
A-bis
BSC
A
BTS
MSC/VLR
Page4Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Communication management (CM)
Radio resources management (RR)
Mobility and security management
(MM)
Integrated management
TCH0 TCH1 TCH2 。。SACCH 。。TCH23 IDL
Multiframe
Physical link layer (L1)
Data link layer (L2)
Network application layer (L3)
Hierarchical Structure of Um
Interface
RACH BCCH AGCH/PCH SDCCH SACCH TCH FACCH
Communication management (CM)
Radio resources management (RR)
Mobility and security management
(MM)
Integrated management
TCH0 TCH1 TCH2 。。SACCH 。。TCH23 IDL
Multiframe
Physical link layer (L1)
Data link layer (L2)
Network application layer (L3)
Hierarchical Structure of Um
Interface
RACH BCCH AGCH/PCH SDCCH SACCH TCH FACCH
Page5Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Radio Access Technology
Frequency
T
i
m
e
Power
Frequency
T
i
m
e
Power
Frequency
T
i
m
e
Power
FDMAFDMA
TDMATDMA
CDMACDMA
U
s
e
r
U
s
e
r
U
s
e
r
U
s
e
r
U
s
e
r
U
s
e
r
U
s
e
r
U
s
e
r
Time
FDMA
Frequency
TDMA
Time
Frequency
CDMA
Frequency
Time
Code
Radio Access Technology
Frequency
T
i
m
e
Power
Frequency
T
i
m
e
Power
Frequency
T
i
m
e
Power
FDMAFDMA
TDMATDMA
CDMACDMA
U
s
e
r
U
s
e
r
U
s
e
r
U
s
e
r
U
s
e
r
U
s
e
r
U
s
e
r
U
s
e
r
Time
FDMA
Frequency
TDMA
Time
Frequency
CDMA
Frequency
Time
Code
Page7Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Contents
1.Overview
2.Processing of Voice Signal
3.Radio Channel
Contents
1.Overview
2.Processing of Voice Signal
3.Radio Channel
Page8Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Voice Signal Processing
((A/DA/D))
2020 msms
22.8kbit/s22.8kbit/s
13kbit/s13kbit/s8KHz,13bi8KHz,13bi
tt
33.8kbit/s33.8kbit/s
SegmentationSegmentation Speech codingSpeech coding Channel codingChannel coding
InterleavingInterleaving EncryptionEncryption)) Burst formatting ModulationModulation
Transmission
Voice
Voice Signal Processing
((A/DA/D))
2020 msms
22.8kbit/s22.8kbit/s
13kbit/s13kbit/s8KHz,13bi8KHz,13bi
tt
33.8kbit/s33.8kbit/s
SegmentationSegmentation Speech codingSpeech coding Channel codingChannel coding
InterleavingInterleaving EncryptionEncryption)) Burst formatting ModulationModulation
Transmission
Voice
Page9Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Analog-Digital Conversion
Analog-Digital Conversion
Page10Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Speech Coding
The Enhance Enhance Full RateFull Rate coding mode is called CELP CELP (Code Excited Linear PredictiCode Excited Linear Predicti
ve Codingve Coding)
The Full RateFull Rate coding mode is called RPE-LTPRPE-LTP (Regular Pulse Excited-Long Term Regular Pulse Excited-Long Term
Prediction). Prediction).
The HalfHalf Rate Rate coding mode is called VCELPVCELP ( (Vector-Sum Excited Linear PredictionVector-Sum Excited Linear Prediction))
13kbit/s13kbit/s260 bits(FR)260 bits(FR)
112 bits(HR)112 bits(HR)
244 bits(EFR)244 bits(EFR) 12.2kbit/s12.2kbit/s
5.6kbit/s5.6kbit/s
((A/DA/D))
2020 msms
8KHz,13bi8KHz,13bi
tt
SegmentationSegmentation Speech codingSpeech coding
Voice
Speech Coding
The Enhance Enhance Full RateFull Rate coding mode is called CELP CELP (Code Excited Linear PredictiCode Excited Linear Predicti
ve Codingve Coding)
The Full RateFull Rate coding mode is called RPE-LTPRPE-LTP (Regular Pulse Excited-Long Term Regular Pulse Excited-Long Term
Prediction). Prediction).
The HalfHalf Rate Rate coding mode is called VCELPVCELP ( (Vector-Sum Excited Linear PredictionVector-Sum Excited Linear Prediction))
13kbit/s13kbit/s260 bits(FR)260 bits(FR)
112 bits(HR)112 bits(HR)
244 bits(EFR)244 bits(EFR) 12.2kbit/s12.2kbit/s
5.6kbit/s5.6kbit/s
((A/DA/D))
2020 msms
8KHz,13bi8KHz,13bi
tt
SegmentationSegmentation Speech codingSpeech coding
Voice
Page11Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Channel Coding
13kbit/s13kbit/s260 bits(FR)260 bits(FR)
112 bits(HR)112 bits(HR)
244 bits(EFR)244 bits(EFR) 12.2kbit/s12.2kbit/s
5.6kbit/s5.6kbit/s
((A/DA/D))
2020 msms
8KHz,13bi8KHz,13bi
tt
SegmentationSegmentation Speech codingSpeech coding
Voice
Channel codingChannel coding
22.8kbit/s22.8kbit/s456bits(FR/EFR)456bits(FR/EFR)
228bits(HR)228bits(HR) 11.4kbit/s11.4kbit/s
Block
Coder
1:2
Convolutional
Coder
Channel Coding
13kbit/s13kbit/s260 bits(FR)260 bits(FR)
112 bits(HR)112 bits(HR)
244 bits(EFR)244 bits(EFR) 12.2kbit/s12.2kbit/s
5.6kbit/s5.6kbit/s
((A/DA/D))
2020 msms
8KHz,13bi8KHz,13bi
tt
SegmentationSegmentation Speech codingSpeech coding
Voice
Channel codingChannel coding
22.8kbit/s22.8kbit/s456bits(FR/EFR)456bits(FR/EFR)
228bits(HR)228bits(HR) 11.4kbit/s11.4kbit/s
Block
Coder
1:2
Convolutional
Coder
Page12Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
1 2 3 4 5 6 7 8 ... ... 452 453 454 455 456
B
8
16
.
.
.
456
2
10
.
.
.
450
6
14
.
.
.
454
1
9
.
.
.
449
4
12
.
.
.
452
7
15
.
.
.
455
3
11
.
.
.
451
5
13
.
.
.
453
.... ....
B0 B1 B2 B3 B4 B5 B6 B7
{A4,B0} {A5,B1} {A6,B2} {A7,B3} {B4,C0} {B5,C1} {B6,C2} {B7,C3}
First interleaving:
Second interleaving:
Interleaving
1 2 3 4 5 6 7 8 ... ... 452 453 454 455 456
B
8
16
.
.
.
456
2
10
.
.
.
450
6
14
.
.
.
454
1
9
.
.
.
449
4
12
.
.
.
452
7
15
.
.
.
455
3
11
.
.
.
451
5
13
.
.
.
453
.... ....
B0 B1 B2 B3 B4 B5 B6 B7
{A4,B0} {A5,B1} {A6,B2} {A7,B3} {B4,C0} {B5,C1} {B6,C2} {B7,C3}
First interleaving:
Second interleaving:
Interleaving
Page14Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Voice Burst
Tail Tail
bitbit
Tail Tail
bitbit
Guard Guard
periodperiodDatDat
aa
DataData Training sequenceTraining sequence
57 encrypted bits57 encrypted bits
33
bitsbits
8.25 bits8.25 bits26 bits26 bits1
33
bitsbits
57 encrypted bits57 encrypted bits 1
((A/DA/D))
2020 msms
22.8kbit/s22.8kbit/s
13kbit/13kbit/
ss8KHz,13bit8KHz,13bit
33.8kbit/33.8kbit/
ss
SegmentationSegmentationSpeech codingSpeech coding Channel codingChannel coding
InterleavingInterleavingEncryptionEncryption)) Burst formatting ModulationModulation
Transmission
Voice
Voice Burst
Tail Tail
bitbit
Tail Tail
bitbit
Guard Guard
periodperiodDatDat
aa
DataData Training sequenceTraining sequence
57 encrypted bits57 encrypted bits
33
bitsbits
8.25 bits8.25 bits26 bits26 bits1
33
bitsbits
57 encrypted bits57 encrypted bits 1
((A/DA/D))
2020 msms
22.8kbit/s22.8kbit/s
13kbit/13kbit/
ss8KHz,13bit8KHz,13bit
33.8kbit/33.8kbit/
ss
SegmentationSegmentationSpeech codingSpeech coding Channel codingChannel coding
InterleavingInterleavingEncryptionEncryption)) Burst formatting ModulationModulation
Transmission
Voice
Page15Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Voice Signal Processing
33.8 kbit/s
22.8 kbit/s
13 kbit/s
8 kHz
13 bits
Transmitting part
Receiving part
Speaker
Receiver
Demodulator
Adaptive
Equalization
De-ciphering
De-interleaving
Channel decoding
Speech decoding
D/A-conversion
Transmitter
Modulator
Burst formatting
Ciphering
Interleaving
Channel coding
Speech coding
Segmentation
A/D-conversion
Microphone
13 kbit/s
Transmitting part
Receiving part
Transmitter
Modulator
Burst formatting
Ciphering
Interleaving
Channel coding
D/D-conversion
8 kHz
8 bits
64 kbit/s PCM
Receiver
Demodulator
Adaptive
Equalization
De-ciphering
De-interleaving
Channel Decoding
GSM Network
Mobile equipment
Voice Signal Processing
33.8 kbit/s
22.8 kbit/s
13 kbit/s
8 kHz
13 bits
Transmitting part
Receiving part
Speaker
Receiver
Demodulator
Adaptive
Equalization
De-ciphering
De-interleaving
Channel decoding
Speech decoding
D/A-conversion
Transmitter
Modulator
Burst formatting
Ciphering
Interleaving
Channel coding
Speech coding
Segmentation
A/D-conversion
Microphone
13 kbit/s
Transmitting part
Receiving part
Transmitter
Modulator
Burst formatting
Ciphering
Interleaving
Channel coding
D/D-conversion
8 kHz
8 bits
64 kbit/s PCM
Receiver
Demodulator
Adaptive
Equalization
De-ciphering
De-interleaving
Channel Decoding
GSM Network
Mobile equipment
Page16Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Transmission delay t
Transmission delay t
TA
The mobile phone should
send the signal in advance!!
Timing Advance (TA)
Transmission delay t
Transmission delay t
TA
The mobile phone should
send the signal in advance!!
Timing Advance (TA)
Page18Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Frequency Hopping
Frequency
f 0
Frame
f 1
f 2
f 3
f 4
Time
Frequency Hopping
Frequency
f 0
Frame
f 1
f 2
f 3
f 4
Time
Page20Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Prolong battery life and
reduce interference
DTX
DTX: Discontinuous Transmission
Shut off the transmission at voice intervals;
Only transmit SID frames’
The transcoder at the RX terminal produces comfortable noise.
VAD: Voice Activity Detection
Implemented by the transcoder.
Prolong battery life and
reduce interference
DTX
DTX: Discontinuous Transmission
Shut off the transmission at voice intervals;
Only transmit SID frames’
The transcoder at the RX terminal produces comfortable noise.
VAD: Voice Activity Detection
Implemented by the transcoder.
Page22Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Power Control
Prolong battery life
Reduce network interference
Include both uplink power control and downlink power control
Level and quality are taken into account
BSC or BTS is the final adjudicator
BCCH Carrier is not
involved in power control.
Time
Signal level
Target level value:
e.g. -85 dm
Power Control
Prolong battery life
Reduce network interference
Include both uplink power control and downlink power control
Level and quality are taken into account
BSC or BTS is the final adjudicator
BCCH Carrier is not
involved in power control.
Time
Signal level
Target level value:
e.g. -85 dm
Page23Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Contents
1.Overview
2.Processing of Voice Signal
3.Radio Channel
Contents
1.Overview
2.Processing of Voice Signal
3.Radio Channel
Page24Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Frequency
200kHz
15/26ms
BP
Slit
Time
Frame and Channel
Frequency
200kHz
15/26ms
BP
Slit
Time
Frame and Channel
Page25Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
32107654321
Physical Channel of Logical Channel
0
different
message
types
Logical channel
Physical
Channel
Logical channel
Logical channel
Logical channel
Logical channel
TDMA FRAME
200K
577 s
32107654321
Physical Channel of Logical Channel
0
different
message
types
Logical channel
Physical
Channel
Logical channel
Logical channel
Logical channel
Logical channel
TDMA FRAME
200K
577 s
Page26Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
8bit
41 synchronous
bits
36 encrypted
bits
3bit 68.25bit
Tail bit Tail bit Guard intervalData
Guard interval
3bit 142bit 3bit8.25bit
Tail bit Tail bitData
3bit
39 encrypted
bits
39 encrypted
bits
3bit8.25bit
Tail bit Tail bitGuard intervalDataData
Burst
64 synchronous bits
•Access burst (AB): Used in MS initial access
•Frequency correction burst (FB): Used in frequency synchronization between
MS and BTS
•Synchronous burst (SB): Used in timing synchronization between MS and
BTS
8bit
41 synchronous
bits
36 encrypted
bits
3bit 68.25bit
Tail bit Tail bit Guard intervalData
Guard interval
3bit 142bit 3bit8.25bit
Tail bit Tail bitData
3bit
39 encrypted
bits
39 encrypted
bits
3bit8.25bit
Tail bit Tail bitGuard intervalDataData
Burst
64 synchronous bits
•Access burst (AB): Used in MS initial access
•Frequency correction burst (FB): Used in frequency synchronization between
MS and BTS
•Synchronous burst (SB): Used in timing synchronization between MS and
BTS
Page27Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
3bit
142 modulation bits 3bit8.25bit
Tail bit Tail bitGuard interval
Burst
3bit 57 encrypted bits 57 encrypted bits 3bit8.25bit
Tail bit Tail bitGuard intervalDataData
26bit1 1
Training sequence
Frame stealing flag
Normal burst (NB)
Used to carry the information of the traffic channel and the control
channel except for RACH
Dummy burst (DB)
Used in transmission of filling frames by BTS at timeslots when there is no information delivered
3bit
142 modulation bits 3bit8.25bit
Tail bit Tail bitGuard interval
Burst
3bit 57 encrypted bits 57 encrypted bits 3bit8.25bit
Tail bit Tail bitGuard intervalDataData
26bit1 1
Training sequence
Frame stealing flag
Normal burst (NB)
Used to carry the information of the traffic channel and the control
channel except for RACH
Dummy burst (DB)
Used in transmission of filling frames by BTS at timeslots when there is no information delivered
Page28Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Broadcast control channel
(BCH)
Control channelCommon control channel
(CCCH)
Voice channel
(TCH)
FCCHSCH BCCH TCH/FAGCH RACH
SDCCH
FACCH
SACCH
TCH/H
PCH
Common channel
(CCH)
Dedicated channel
(DCH)
Logical channel
Logical Channel Type
GSM900 and DCS1800 have the same logical channel category
(system information)
Broadcast control channel
(BCH)
Control channelCommon control channel
(CCCH)
Voice channel
(TCH)
FCCHSCH BCCH TCH/FAGCH RACH
SDCCH
FACCH
SACCH
TCH/H
PCH
Common channel
(CCH)
Dedicated channel
(DCH)
Logical channel
Logical Channel Type
GSM900 and DCS1800 have the same logical channel category
(system information)
Page29Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
FCCH
SCH
BCCH
PCH
AGCH
BCCH
CCCH
Common
Channel
SDCCH
SACCH
FACCH
TCH/F
TCH/H
DCCH
TCH
Dedicated
Channel
Downlink Logical Channel
FCCH
SCH
BCCH
PCH
AGCH
BCCH
CCCH
Common
Channel
SDCCH
SACCH
FACCH
TCH/F
TCH/H
DCCH
TCH
Dedicated
Channel
Downlink Logical Channel
Page31Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
RACH CCCH
Common
channel
SDCCH
SACCH
FACCH
TCH/F
TCH/H
DCCH
TCH
Dedicated
channel
Uplink Logical Channel
RACH CCCH
Common
channel
SDCCH
SACCH
FACCH
TCH/F
TCH/H
DCCH
TCH
Dedicated
channel
Uplink Logical Channel
Page33Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Use of Logical Channels
FCCH
Allocate signaling channel
Power-on Search for frequency correction burst
Search for synchronous burst
Listen to the system information
Monitor paging message
Send access burst
Set up the call
Allocate voice channel
Conversation
Release the call
Idle mode
SCH
BCCH
PCH
RACH
AGCH
SDCCH
SDCCH
TCH
FACCH
Dedicated mode
Idle mode
Use of Logical Channels
FCCH
Allocate signaling channel
Power-on Search for frequency correction burst
Search for synchronous burst
Listen to the system information
Monitor paging message
Send access burst
Set up the call
Allocate voice channel
Conversation
Release the call
Idle mode
SCH
BCCH
PCH
RACH
AGCH
SDCCH
SDCCH
TCH
FACCH
Dedicated mode
Idle mode
Page34Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
26-frame multi-frame
TCH/F+FACCH/F+SACCH/F (full-rate TCH)
TCH/H+FACCH/H+SACCH/H (half-rate TCH)
51-frames multi-frame
FCCH+SCH+BCCH+CCCH (main BCCH)
FCCH+SCH+BCCH+CCCH+SDCCH/4+SACCH/4 (combined BCCH)
BCCH+CCCH (extended BCCH)
SDCCH/8+SACCH/8 (main SDCCH)
Physical Combination of Logical
Channel
26-frame multi-frame
TCH/F+FACCH/F+SACCH/F (full-rate TCH)
TCH/H+FACCH/H+SACCH/H (half-rate TCH)
51-frames multi-frame
FCCH+SCH+BCCH+CCCH (main BCCH)
FCCH+SCH+BCCH+CCCH+SDCCH/4+SACCH/4 (combined BCCH)
BCCH+CCCH (extended BCCH)
SDCCH/8+SACCH/8 (main SDCCH)
Physical Combination of Logical
Channel
Page35Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Structure of Main BCCH
1 multi-frame (51TDMA Frames) 235.38ms Downlink
Group Group1 Group2
Group3,4
(same
as
Group2)
Grpup5
Channel FSBX4 CX4 F SCX4 CX4 …… FS CX4 CX4 I
Frame
Number
01 2-5 6-9101112-1516-19 20-39 404142-45
46-
49
50
1 multi-frame (51TDMA Frames) 235.38ms Uplink
ChannelRRRRRRRRRRRRRR……R RRRR
Frame
Number
0123456789101112 13-46 47484950
F:FCCH; S:SCH; B:BCCH; C:CCCH; R:RACH; I:IDLE
Structure of Main BCCH
1 multi-frame (51TDMA Frames) 235.38ms Downlink
Group Group1 Group2
Group3,4
(same
as
Group2)
Grpup5
Channel FSBX4 CX4 F SCX4 CX4 …… FS CX4 CX4 I
Frame
Number
01 2-5 6-9101112-1516-19 20-39 404142-45
46-
49
50
1 multi-frame (51TDMA Frames) 235.38ms Uplink
ChannelRRRRRRRRRRRRRR……R RRRR
Frame
Number
0123456789101112 13-46 47484950
F:FCCH; S:SCH; B:BCCH; C:CCCH; R:RACH; I:IDLE
Page36Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Structure of Combined BCCH
1 multi-frame (51TDMA Frames) 235.38ms Downlink
Group Group1 Group2 Group3 Group4 Grpup5
Channel F S
B×
4
C×
4
F S
C×
4
C×
4
F S
D0
×4
D1
×4
F S
D2
×4
D3
×4
F S
A0
×4
A1
×4
I
Channel F S
B×
4
C×
4
F S
C×
4
C×
4
F S
D0
×4
D1
×4
F S
D2
×4
D3
×4
F S
A2
×4
A3
×4
I
Frame
Number
0 12-56-91011
12-
15
16-
19
2021
22-
25
26-
29
3031
32-
35
36-
39
4041
42-
45
46-
49
50
1 multi-frame (51TDMA Frames) 235.38ms Uplink
Channel D3×4 R R A2×4 A3×4 R……R D0×4 D1×4 R R D2×4
Channel D0×4 R R A0×4 A1×4 R……R D0×4 D1×4 R R D2×4
Frame
Number
0-3 4 5 6-9 10-13 14-36 37-40 41-44 45 46 47-50
F:FCCH; S:SCH; B:BCCH; C:CCCH; D:SDCCH ;A:SACCH; R:RACH; I:IDLE
Structure of Combined BCCH
1 multi-frame (51TDMA Frames) 235.38ms Downlink
Group Group1 Group2 Group3 Group4 Grpup5
Channel F S
B×
4
C×
4
F S
C×
4
C×
4
F S
D0
×4
D1
×4
F S
D2
×4
D3
×4
F S
A0
×4
A1
×4
I
Channel F S
B×
4
C×
4
F S
C×
4
C×
4
F S
D0
×4
D1
×4
F S
D2
×4
D3
×4
F S
A2
×4
A3
×4
I
Frame
Number
0 12-56-91011
12-
15
16-
19
2021
22-
25
26-
29
3031
32-
35
36-
39
4041
42-
45
46-
49
50
1 multi-frame (51TDMA Frames) 235.38ms Uplink
Channel D3×4 R R A2×4 A3×4 R……R D0×4 D1×4 R R D2×4
Channel D0×4 R R A0×4 A1×4 R……R D0×4 D1×4 R R D2×4
Frame
Number
0-3 4 5 6-9 10-13 14-36 37-40 41-44 45 46 47-50
F:FCCH; S:SCH; B:BCCH; C:CCCH; D:SDCCH ;A:SACCH; R:RACH; I:IDLE
Page37Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Structure of Logical Channel
Combination Frame-Main SDCCH
1 multi-frame (51TDMA Frames) 235.38ms Downlink
Channel
D0×
4
D1×
4
D2×
4
D3×
4
D4×
4
D5×
4
D6×
4
D7×
4
A0×
4
A1×
4
A2×
4
A3×
4
III
Channel
D0×
4
D1×
4
D2×
4
D3×
4
D4×
4
D5×
4
D6×
4
D7×
4
A4×
4
A5×
4
A6×
4
A7×
4
III
Frame
Number
0-34-78-11
12-
15
16-
19
20-
23
24-
27
28-
31
32-
35
36-
39
40-
43
44-
47
484950
1 multi-frame (51TDMA Frames) 235.38ms Uplink
Channel
A5×
4
A6×
4
A7×
4
I I I
D0×
4
D1
×4
D2×
4
D3×
4
D4×
4
D5×
4
D6×
4
D7×
4
A0×
4
Channel
A1×
4
A2×
4
A3×
4
I I I
D0×
4
D1
×4
D2×
4
D3×
4
D4×
4
D5×
4
D6×
4
D7×
4
A4×
4
Frame
Number
0-34-78-1112 13 14
15-
18
19-
22
23-
26
27-
30
31-
34
35-
38
39-
42
43-
46
47-
50
D:SDCCH; A:SACCH; I:IDLE
Structure of Logical Channel
Combination Frame-Main SDCCH
1 multi-frame (51TDMA Frames) 235.38ms Downlink
Channel
D0×
4
D1×
4
D2×
4
D3×
4
D4×
4
D5×
4
D6×
4
D7×
4
A0×
4
A1×
4
A2×
4
A3×
4
III
Channel
D0×
4
D1×
4
D2×
4
D3×
4
D4×
4
D5×
4
D6×
4
D7×
4
A4×
4
A5×
4
A6×
4
A7×
4
III
Frame
Number
0-34-78-11
12-
15
16-
19
20-
23
24-
27
28-
31
32-
35
36-
39
40-
43
44-
47
484950
1 multi-frame (51TDMA Frames) 235.38ms Uplink
Channel
A5×
4
A6×
4
A7×
4
I I I
D0×
4
D1
×4
D2×
4
D3×
4
D4×
4
D5×
4
D6×
4
D7×
4
A0×
4
Channel
A1×
4
A2×
4
A3×
4
I I I
D0×
4
D1
×4
D2×
4
D3×
4
D4×
4
D5×
4
D6×
4
D7×
4
A4×
4
Frame
Number
0-34-78-1112 13 14
15-
18
19-
22
23-
26
27-
30
31-
34
35-
38
39-
42
43-
46
47-
50
D:SDCCH; A:SACCH; I:IDLE
Page38Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Structure of Logical Channel
Combination Frame-TCH
T:TCH;A:SACCH; I:IDLE
1 multi-frame (26TDMA Frames) 120ms
Channel TT T T T T T…T A T,,,TT T T T T T I
Frame
Number
01 2 3 4 56…11 1213…18 19 20 2122 23 2425
1 multi-frame (26TDMA Frames) 120ms
Channel T t T t T t T…t A T,,,tT t T t T t a
Frame
Number
01 2 3 4 56…11 1213…18 19 20 2122 23 2425
Case of one full rate TCH
Case of two half rate TCHs
Structure of Logical Channel
Combination Frame-TCH
T:TCH;A:SACCH; I:IDLE
1 multi-frame (26TDMA Frames) 120ms
Channel TT T T T T T…T A T,,,TT T T T T T I
Frame
Number
01 2 3 4 56…11 1213…18 19 20 2122 23 2425
1 multi-frame (26TDMA Frames) 120ms
Channel T t T t T t T…t A T,,,tT t T t T t a
Frame
Number
01 2 3 4 56…11 1213…18 19 20 2122 23 2425
Case of one full rate TCH
Case of two half rate TCHs
Page39Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
0 1 2 3 2044204520462047
0 1 2 3 48 49 5047
0 1 24 25
0 1 24 25 1 49 500
0 1 4 5 762 3
TB
3
TB
3
GP
8.25
TB: Tail bitTB
3
TB
3
GP
8.25
GP: Guard period
TB
3
TB
3
GP
8.25
TB
3
TB
3
GP 68.25
58 information bits
26 training
sequences
58 information bits
Constant bit 142
Information bit 39Extended training sequence 64Information bit 39
Synchronous sequence 41Information bit 36
Normal burst (NB)
Frequency correction burst (FB)
Synchronous burst (SB)
Access burst (AB)
1 hyper frame=2048 super-frames=2715648TDMA frames (3 hours, 28 minutes, 53 seconds and 760 milliseconds)
1 super-frame=1326TDMA frames (6.12 seconds)
1 multiframe=26TDMA frames (120ms) 1 multiframe=51TDMA frames (3060/13ms)
1TDMA frame=8 timeslots (120/26=4.615ms)
1 timeslot=156.25 bit duration (15/26=0.577ms)
(1 bit duration: 48/13=3.68us)
BCCH
CCCH
SDCCH
TCH
SACCH/T
FACCH
Frame
0 1 2 3 2044204520462047
0 1 2 3 48 49 5047
0 1 24 25
0 1 24 25 1 49 500
0 1 4 5 762 3
TB
3
TB
3
GP
8.25
TB: Tail bitTB
3
TB
3
GP
8.25
GP: Guard period
TB
3
TB
3
GP
8.25
TB
3
TB
3
GP 68.25
58 information bits
26 training
sequences
58 information bits
Constant bit 142
Information bit 39Extended training sequence 64Information bit 39
Synchronous sequence 41Information bit 36
Normal burst (NB)
Frequency correction burst (FB)
Synchronous burst (SB)
Access burst (AB)
1 hyper frame=2048 super-frames=2715648TDMA frames (3 hours, 28 minutes, 53 seconds and 760 milliseconds)
1 super-frame=1326TDMA frames (6.12 seconds)
1 multiframe=26TDMA frames (120ms) 1 multiframe=51TDMA frames (3060/13ms)
1TDMA frame=8 timeslots (120/26=4.615ms)
1 timeslot=156.25 bit duration (15/26=0.577ms)
(1 bit duration: 48/13=3.68us)
BCCH
CCCH
SDCCH
TCH
SACCH/T
FACCH
Frame
Page41Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
PCH RACHAGCH
Downlink CCCH Uplink CCCH
How to determine the total CCCH resources of the cell? How to
allocate AGCH and PCH reasonably?
Configuration of Common Control Channel
PCH RACHAGCH
Downlink CCCH Uplink CCCH
How to determine the total CCCH resources of the cell? How to
allocate AGCH and PCH reasonably?
Configuration of Common Control Channel
Page42Copyright © 2008 Huawei Technologies Co., Ltd. All rights reserved.
Summary
In this course, we have learned:
Processing of Voice Signal
Radio Channel in Um Interface
Key Technical in Um Interface
Summary
In this course, we have learned:
Processing of Voice Signal
Radio Channel in Um Interface
Key Technical in Um Interface
Thank you
www.huawei.com
www.huawei.com
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