From HSPA+ to LTE
Christian Daigneault, CTO
Agenda
• CSL Technology vision and challenges
• The Solution- Step 1: NEXT G HSPA+ Network
• Step 2: Next G LTE
• Initial Findings from CSL’s LTE trial in Hong Kong
CSL Company Profile
• Established in 1983, CSL was Hong Kong’s first mobile operator.
• Subsidiary of Telstra, Australia’s leading operator
• Largest GSM/UMTS mobile operator by subscribers and revenues
• Multi-Brand strategy: 1010, one2free, New World Mobility
• Awarded a 4G FD-LTE 2.6GHz License in January 2009
• First to launch ALL IP 21 Mbps network in March 2009
• Started LTE Trial in September 2009 in Hong Kong
Network Challenges in Hong Kong
• Expensive site rental costs
• Expectation of in-building
coverage
• Very dense urban
environment
• Expensive legacy
backhaul
• Explosion in data demand
Very high operating cost, cannot support future data growth
is the Solution
1st Full IP Commercial
HSPA+ (21Mbps) Network
SDR Based
Commercial Network
Integrated Multi-mode
Quad-band Network
4G LTE Ready
…building on ‘s award winning Next G network
to deliver the fastest wireless network in Hong Kong
21 Mbps Support all over Hong Kong
RAN, CORE, Backhaul, and VAS were all replaced
to support evolution
OSS BSC MSC OTA
RNC SGSN Prepaid
Fiber Node B GGSN WAP
Microwave Repeaters HLR MPS
Leveraging Next G’s SDR Advantage
900M 1800M 2100M 2600M
(GSM/UMTS) (PCS) (UMTS) (LTE)
Old Use 2G Only 2G Only 3G Only Not Applicable
Today !
New Next 2G and 3G 2G and 4G 3G 4G
G Use
Coverage Advantage: Better Coverage Indoors and Outdoors
Benefits Capacity, Speed and Cost (Less Sites) Advantage
Spectrum re-farming flexibility (Long Term)
The roll-out of UMTS/HSPA+ in the 900 MHz band already
illustrates the benefits of Next G’s SDR technology
8
Performance Benchmarking in Hong Kong
Third Party measurements show that 3G coverage is better
than 2G; 64 QAM modulation is possible more than 50% of
the time
From HSPA+ to LTE, Why?
• Result= spectrum and network capacity to easily
upgrade to LTE ensuring customer service for
years
• Mid-long term CSL invests in LTE > ensure customer
experience
• Short-mid term CSL invests in HSPA+ > customer
experience
• LTE allows greater bandwidth to cope with demand
• New data devices are driving demand at exponetial levels
• NextG is All-IP: Ready for LTE
• Data traffic is now greater than voice traffic
• Voice will also be provided by VoIP
• Mobile data is best served with IP
Relative Data Usage
0
5
10
15
20
25
Jul-08
Aug-08
Sep-08
Oct-08
Legacy
Nov-08
Dec-08
Jan-09
Feb-09
Mar-09
Apr-09
Launch
May-09
Jun-09
Jul-09
Aug-09
Sep-09
Oct-09
Nov-09
Dec-09
Jan-10
Feb-10
Mar-10
Next G Data Traffic – 23X Increase Since Launch
Chinese
New Year
Next G Traffic Profile – Typical Internet
Peer to Peer
Other 21%
30%
Multi-Media
19%
HTTP, UDP,
FTP
30%
January 2010 Usage Profile
Broadband Technology Roadmap: LTE Convergence
2008 2009 2010 2015+
HSPA HSPA+ HSPA+ (DC)
DL: 14.4 Mbps DL: 21 Mbps DL: 42 Mbps
UL: 2 Mbps UL: 5.8 Mbps UL: 11.5 Mbps
3
G (5 MHz) (5 MHz) (2 x 5 MHz) LTE LTE
P DL: 100 Mbps
P TD-
TD-SCDMA
TD-SCDMA
(HSPA+)
Advanced
DL: 2.8 Mbps UL: 50 Mbps
DL: 4.2 Mbps DL: 300+ Mbps
(1.6 MHz TDD) (20 MHz 2*2 MIMO)
(1.6 MHz TDD) (100 MHz)
Features: OFDMA, Features: Relays,
3 EV-DO Rev A MIMO, Flat All IP Scalable Bandwidth,
G DL: 3.1 Mbps Architecture Advanced MIMO
P
P UL: 1.8 Mbps
2 (1.25 MHz)
I WiMax Mobile
E DL: 75 Mbps WiMax
E UL: 16 Mbps (802.16m)
E (20 MHz 2*2 MIMO)
Reduced Cost per Bit with LTE
1.2
Relative Cost per bit
1.0 HSPA+
0.8
LTE
0.6
0.4
LTE-A
0.2
0.0
2009 2011 2014
LTE Will Reduce Cost per Bit – Needed for Exploding Traffic Demand
CSL’s LTE Technology Centre: Promoting Earlier LTE
Development
1. Next G Powered – Today!
2. LTE Ready Office with Dual Antennas (MIMO)
3. Network Laboratory for 3G and 4G Technologies
4. First LTE Live Cell Site and Centre of LTE Trial Clusters
5. LTE Experience and Demo Room
15
LTE Commercial Trial in Hong Kong - Scope
• Prove LTE performance, capacity, and
functionality
• Benchmark versus HSPA+
• Develop guidelines for large-scale rollout
• Several clusters of eNodeBs rolled out in various
environments
Initial Trial Results – Kowloon Bay, Hong Kong
100 Mbps Reached
over-the-air
LTE Drive Test Route - Category 3 UE, 2.6 GHz
FDD, 20 MHz Channel
Initial Trial Results – Kowloon Bay, Hong Kong
Large Percentage Slow throughput
of High Throughput due to handover
Areas (optimizing now)
< 5Mbps
> 50 Mbps
23.5%
26.6%
40-50 Mbps 5-10 Mbps
11.3% 20.7%
30-40 Mbps 10-15 Mbps
7.0% 2.7%
20-30 Mbps
15-20 Mbps
6.2%
2.1%
Initial Trial Findings/Progress Report
• LTE performance is promising
• High LTE transmit speeds are exposing
other (non-RAN) bottlenecks
• USB dongle IOT completed
• Peak 100 Mbps throughput demonstrated
• Full stack including UDP, FTP, Video Streaming
• 2*2 MIMO including Tx Diversity and Spatial
Multiplexing
• High-speed mobility
In Closing
1. HSPA+/LTE are both required to reduce cost per bit
2. First Step to LTE: an all IP HSPA+ network
3. CSL is at the forefront of LTE development to meet
our customer needs
Let’s see a short video clip of LTE measurements in HK
Thank You
