Edge

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EDGE Trial
All Rights Reserved © Alcatel-Lucent 2008
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AGENDA
EDGE overview
Hardware support
EDGE radio features
EDGE Transmission
Field Trial
Conclusion
All Rights Reserved © Alcatel-Lucent 2008
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EDGE :
Enhanced Data rates for GSM Evolution
GSM
VOICE DATA
Circuit
Circuit Packet
9.6
14.4
HSCSD
ECSD
GPRS
EGPRS
EDGE =
Q
I
010
011
100
101
111
110
001
000
Q
I
GMSK GMSK GMSK 8PSK 8PSK 8PSK
EDGE = E-GPRS + E-CSD
only E-GPRS to be considered
Same frequency spectrum as GSM/GPRS
850, 900, 1800, 1900 MHz
Same protocol architecture as for GPRS
New Modulation for higher bit rates
8-PSK (8-Phase Shift Keying)
– Above the 22.8kbps of GMSK
Very interesting E-GPRS technology
supported by Alcatel in late 90’s
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CS = Coding Scheme
MCS = Modulation & Coding Scheme
Data rate per radio TS (RLC payload) in kb/s
Note : GMSK means Gaussian Minimum Shift Keying
Scheme Modulation Rate [kbps]
MCS-9 8PSK 59.2
MCS-8 8PSK 54.4
MCS-7 8PSK 44.8
MCS-6 8PSK 29.6
MCS-5 8PSK 22.4
MCS-4 GMSK 17.6
MCS-3 GMSK 14.8
MCS-2 GMSK 11.2
MCS-1 GMSK 8.8
Used MCS for EDSE with
SMSk & ß-PSk
CS-4 20
CS-3 14,4
CS-2 12
CS-1 8
Used CS for SPRS
with SMSk,,,
EDGE Modulation & Coding Schemes
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Main EDGE services
A need for high throughput in DL …and UL !
Audio/Video
Streaming
Short Videos
MP3
Video Portal
Video
Messaging
1. Receive
2. Open Video
3. Playback
Interactive
Gaming
PLAYER 1
PLAYER 4
Game
Server
Emails
& Attachments
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EDGE feature in B9
EDGE overview
Hardware support
EDGE radio features
EDGE Transmission
Field Trial
Conclusion
All Rights Reserved © Alcatel-Lucent 2008
Page 7
Alcatel is leading the EDGE infrastructure race
Introducing by software upgrade only
BTS
BSC
BTS
BTS
Mobile Radio
MSC/VLR
HLR
PSTN
TC
GPRS
Box
(PCU)
GGSN
SGSN
IP
backbone
Internet /
Intranet
Mobile Core
How can Alcatel help you deploy EDGE?
Why we are different ...
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Optimize your EDGE network investment
Alcatel BSS Hardware support
BTS :
Support of EDGE in all A9100 Evolium
TM
BTS
on all Evolium
TM
Evolution step 2 TRX (TRA)
Micro-BTS :
support of EDGE on A9110 Evolium
TM
- Evolution
PCU :
Support of EDGE in A9135 MFS
BSC :
Support of EDGE in A9120 BSC
No need for specific EDGE TRX
1998: All Evolium
TM
BTS are EDGE-ready
2001: All Evolium
TM
TRX are EDGE capable
All Rights Reserved © Alcatel-Lucent 2008
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EDGE feature in B9
EDGE overview
Hardware support
EDGE radio features
EDGE Transmission
Field Trial
Conclusion
All Rights Reserved © Alcatel-Lucent 2008
Page 10
EDGE Radio Features
Features supported by default with EDGE package :
Support of all MCS in Downlink & Uplink
Support of Link Adaptation in Downlink & Uplink
Support of Incremental Redundancy in Downlink & Uplink
Incremental Redundancy
Combines information from successive transmissions of the same
blocks
Link Adaptation
Adapts to local radio propagation conditions
Enables automatic adaptation to
most appropriate Modulation&Coding Schemes (MCSs)
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Radio Resource Management
Optimised radio resource allocation algorithm:
EDGE capable TRX are not dedicated to EDGE traffic only
They can be used for voice
GPRS and EDGE share the same radio resources
No need to reserve radio TS or parameter to tune for EDGE or GPRS
Common pool of radio resources shared by CS, GPRS and EDGE users
Although CS users need dedicated resources (blocking if none available), PS users accept
sharing resources with others
EDGE MS preferably on high capacity TRX for maximum throughput
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EDGE feature in B9
EDGE overview
Hardware support
EDGE radio features
EDGE Transmission
Field Trial
Conclusion
All Rights Reserved © Alcatel-Lucent 2008
Page 13
Dynamic Abis performed at BTS level
Pool of extra TS reserved for data on Abis and
defined by the operator
Benefit ...
A-bis Dynamic Allocation
Principle …
BTS (N Cells)
Cell 1
Cell 2
Cell N
Optimal usage of All Abis TS for EDGE (including Signalling TS)
Dynamic allocation to a TRX, depending on
the Packet traffic
Abis
TRXs
TRXs
TRXs
A
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Im
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Less A-bis consumption ... to minimize your investments !
All Rights Reserved © Alcatel-Lucent 2008
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Terminology for B9 Release
“Basic” nibbles
Result from fixed mapping of radio timeslots (e.g.TCH) on the A-bis interface
Carry the CS (and part of the PS) traffic
“Extra” nibbles
Additional A-bis timeslots
Their number is Their number is defined by the operator: Full flexibility ! defined by the operator: Full flexibility !
“Bonus” nibbles
Basic Nibbles corresponding to BCCH or SDCCH
Up to B9, free unless used to transport TRX & O&M signalling links (RSL +OML)
A-bis
Radio
TCH
BCCH
BCCH
SD
SD
SD
SD
cell A
cell B
extra nibbles
basic nibbles
cell B
basic nibbles
cell A
bonus
nibbles
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Dynamic A-bis Feature
Distributes a number transmission resources (nibbles) to each
TRX of the A-bis link
Extra and bonus nibbles are shared at BTS level
Basic nibbles are shared at cell level
This number is based on the actual packet demand in the TRX
An equity mechanismensures that all TRX of the BTS are served
with fairness
Played at each TBF establishment & on a regular basis
Extra/Bonus-nibbles are distributed with fairness to all TRX which require
A-bis resource
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In B9 :
All coding scheme are allowed
Dynamic allocation of A-bis resources to the TRX
Statistical multiplexing for PS
One single “packet pipe” per TRX, for PS traffic
TCH/F
idle
PDCH
n (variable)
x 16 kbit/s
PDCH
PDCH
PDCH
PDCH
1
0
3
2
5
4
7
6
1 x 16 kbit/s
speech
1 x 16 kbit/s
speech
Unused TS: no A-bis resource required
.
.
.
.
.
.
Single
Packet pipe
=
M-EGCH
TRX
Depends on the required aggregated bit rate of all the PDCH currently active in this
TRX
TCH/F
Dimensioning of your BTS with EDGE
Benefits of Abis dynamic allocation
Increase of downlink throughput
up to 59.2kb/s with minimum
impact on Abis transmission
resources
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Without Abis Packet multiplexing:
1 PDCH = 2 GCH*
Total occupation : 8 GCH*
Aggregation of all data traffic of each TRX as
one single “big pipe”
Example: one GPRS session with 4 PDCHs in CS-3
With Abis Packet Multiplexing,
no round up : no wasted bandwidth
With Abis Packet multiplexing:
1 PDCH = 1.22 GCH*
Total occupation : 4.88 GCH*
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!
* GCH = GPRS channel on Abis & Ater
0 1 6 3 2 4 8 6 4 8 0
C S- 2
C S- 3
C S- 4
M C S- 1
M C S- 2
M C S- 3
M C S- 4
M C S- 5
M C S- 6
M C S- 7
M C S- 8
M C S- 9
0 1 6 3 2 4 8 6 4 8 0
C S- 2
C S- 3
C S- 4
M C S- 1
M C S- 2
M C S- 3
M C S- 4
M C S- 5
M C S- 6
M C S- 7
M C S- 8
M C S- 9

throughput (kbit/ s)
header
EDGE data
GPRS data
header
EDGE data
GPRS data
Throughput (kb/s)
Dimensioning of your BTS with EDGE
Benefit of Abis Packet Multiplexing
All Rights Reserved © Alcatel-Lucent 2008
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Release B9 answers the gradual evolution of end users requests for premium
services:
Availability of downlink throughput up to 59.2kb/s with minimum impact on Abis
transmission resources:
Abis dynamic allocation : principle is to Underdimension terrestrial transmission resources,
compared to full speed on Air interface on all TRX
> Few simultaneous users are using High EDGE traffic in a BTS:
> All TRXs don’t perform “Full Speed packet” simultaneously
Abis packet multiplexing : principle is no fragmentation of Abis: no wasted Timeslot
Dimensioning of your BTS with EDGE
Follow packet traffic growth without hardware addition
All Rights Reserved © Alcatel-Lucent 2008
Page 19
EDGE feature in B9
EDGE overview
Hardware support
EDGE radio features
EDGE Transmission
Field Trial
Conclusion
All Rights Reserved © Alcatel-Lucent 2008
Page 20
Main outcomes of past field trials
In good radio conditions, the maximum
theoretical throughputs can be achieved :
~220kbps
Typical application-level throughputs:
130-150kbps
In bad radio conditions, average throughputs:
100-130kbps
Incremental Redundancy brings
significant improvements (up to 50% gains)
EDGE brings most gains for large file transfers
or streaming …
reduced gains for short transfers or Web
Frequency Hopping degrades EDGE throughputs
but EDGE possible with FH
All Rights Reserved © Alcatel-Lucent 2008
Globacom Nigeria field trial
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Trial BSC : BSC LAG1_1 (configuration 5 and 11 TSU)
Site number : 16 sites in two LACs (LAG999 a business solution).
TSU2 completely utilized while 4 TSUs (TSU1,4,9,10,11) are highly
loaded .
TSU3,6,7,8 are not loaded.
Split between site LAG110_1 and LAG110_2 to avoid Multidrop
1. Coding Scheme MCS6 (29.6 Kbit/s) on all cells:
1 extra Abis link for site LAG129_1
1/16 (around 6%) of the sites needs extra Abis link.
2. Coding Scheme MCS9 (59.2 Kbit/s) on all cells:
1 extra Abis link for site LAG129_1 , LAG131_1, LAG054,
LAG211_1, LAG600, LAG241_1 and LAG112_1.
7/16 (around 44%) of the sites needs extra Abis link.
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Trial Schedule
Step Action Details
Timeline
1
Collection of Data & Global
checking
FTP local server availability W845
Identification of EDGE TRX impacted by Quality Alert (QA06R04) W845
Current network load (BSC, Transmission) W846
Ressources identification (RNE ) W846
Tool availability W846
BO Architecture Study
Delivery of the required inputs for the PS Architecture study to BO(files, list of cells
and BSC for the trial) W846
Delivery of the EDGE Architecture and strategy W847
Tool acquisition
Temporarily acquisition of a Mobile compatible EDGE from Benin W847
Acquisition of a new drive-test tool with Mobile compatible EDGE W851
2 Implementation
Implementation strategy definition W847
BSS & Transmission ressources assignment (TSU, link capacity) W848
Work orders release W848
Drive test W848
Implementation (on OMC-R and on site) W848
3 Radio netwotk optimization
Drive test W848
QoS monitoring on RNO W849
Radio fine tuning W850
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Let’s summarize
EDGE : Generate revenue from 2G cash cow
Target new markets
Offer ~3G innovative services
over existing GSM network
Differentiate from the competition
Maximize 2G investment
Offer today High-Speed mobile data services
high data rates : 150 kb/s typical values
at least three times higher than GPRS
EDGE is both ...
A natural evolution from GSM/GPRS & complementary solution to
UMTS
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Questions ?