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WM Lab, Tongji Univ.
Performance Evaluation Methodology
& Key Technologies of New Generation
Broadband Wireless Access Networking
Zhiwei Gao
Broadband Wireless Communication and Multimedia Institute
School of Electronics and Information Engineering
Tongji University
http://wm.tongji.edu.cn
第（1）页
http://WM.tongji.edu.cn
WM Lab, Tongji Univ.
 Future Wireless Broadband Test Environment
Parameters of Future Wireless Broadband
Wireless Access Sketch Maps
 Platform of Wireless Access Scenarios
Simulation of Relay & Distributed Networks
Approach to Real World
 Test Methodology
Simulation Platform Associated Application Traffic Test
Combination with Wireless Test Hardware
 What Can We Test
第（2）页
http://WM.tongji.edu.cn
WM Lab, Tongji Univ.
 Future Wireless Broadband Test Environment
Parameters of Future Wireless Broadband
Wireless Access Sketch Maps
 Platform of Wireless Access Scenarios
Simulation of Relay & Distributed Networks
Approach to Real World
 Test Methodology
Simulation Platform Associated Application Traffic Test
Combination with Wireless Test Hardware
 What Can We Test
第（3）页
http://WM.tongji.edu.cn
Framework of Tongji 4G-Test Research
WM Lab, Tongji Univ.
第（4）页
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Future Wireless Broadband Test Environment
WM Lab, Tongji Univ.
Tongji BWA Lab
Platform Parameters
Parameter
Value
Carrier frequency
2.4 GHz ---- 6GHz
Channel bandwidth
2x50 MHz
Number of cells
7 (center evaluated)
Users per cell
10 (3 One-Hop, 7 2-Hop)
Inter-site deployment
800m, 1000m, 1200m
Distance BS – RN
45% of distance BS-BS
Traffic load
1-54 MBit/s
type of antennas
omni
RN /UT number of antenna
1 2 4(MIMO)
BS transmission power
46 dBm
RN transmission power
37 dBm
UT transmission power
24 dBm
Traffic model
Full buffer
Retransmissions
Yes
Mobility
Yes
Resource scheduling
Exhaustive Round Robin (ERR)
Multi-Access Method
OFDMA
IP Networks
Full IP
The parameters used in the
simulations of the baseline
deployment in wide area test
case are illustrated. The NLOS
channel model was used for BSRN links and NLOS for RN-MS
links. We designed HARQ for
packet retransmissions due to
errors. We have assumed all the
network nodes are IP-based.
Users are considered to have
mobility from BS to BS with
mip.
第（5）页
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Future Wireless Broadband Test Environment
WM Lab, Tongji Univ.
Wireless Access Sketch Maps
Relay Access:
BUS
Mobile
RS
SS
1
SS2
Fixed
RS
SS3
MS
车载宽带
无线接入
Relay网络
Backbone networks
BTS
（-433，750）
（-866，0）
（-433，-750）
（433，750）
（866，0）
（433，-750）
1. Frame Structure.
2. Cooperation and Macro-diversity between
Relay Stations.
3. Wireless Resource Management.
4. Spectrum Allocation Technology.
5. Design of ARQ/HARQ.
6. Signal Processing mode of Relay Station.
Distributed Access
1. Transmission Diversity and Receiver
Diversity
2. Smart Antenna and two-dimensional
space-time signal processing technology
3. "Virtual cell" technology
4. Distributed receiving station
分布式网络
第（6）页
http://WM.tongji.edu.cn
WM Lab, Tongji Univ.
 Future Wireless Broadband Test Environment
Parameters of Future Wireless Broadband
Wireless Access Sketch Maps
 Platform of Wireless Access Scenarios
Simulation of Relay & Distributed Networks
Approach to Real World
 Test Methodology
Simulation Platform Associated Application Traffic Test
Combination with Wireless Test Hardware
 What Can We Test
第（7）页
http://WM.tongji.edu.cn
Broadband Wireless Access Simulation Platform
WM Lab, Tongji Univ.
Simulation of Relay & Distributed Networks
In this system, mobile station which is around base
station can access base station as one hop, otherwise,
mobile station which is far from base station can
access base station through multi-hops.
Distributed Access and signal processing are one of
methods to enhance communication system capacity
and spectrum efficiency of next generation wireless
communication.
第（8）页
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Platform of Wireless Access Scenarios
WM Lab, Tongji Univ.
Approaching to Real World
Introducing relief map、
contour line and modified
propagation model when
designing scenarios.
Eventually come up with an
approaching to real world
simulation platform.
第（9）页
http://WM.tongji.edu.cn
WM Lab, Tongji Univ.
 Future Wireless Broadband Test Environment
Parameters of Future Wireless Broadband
Wireless Access Sketch Maps
 Platform of Wireless Access Scenarios
Simulation of Relay & Distributed Networks
Approach to Real World
 Test Methodology
Simulation Platform Associated Application Traffic Test
Combination with Wireless Test Hardware
 What Can We Test
第（10）页
http://WM.tongji.edu.cn
Test Methodology
WM Lab, Tongji Univ.
Simulation Platform Associated Application Traffic Test
第（11）页
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Test Methodology
WM Lab, Tongji Univ.
Simulation Platform Associated Application Traffic Test
Playing in local media server(Left)
Playing in the receiver node with packet loss and delay(Right)
From OPNET
第（12）页
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Test Methodology
WM Lab, Tongji Univ.
 Combination with Wireless Test Hardware
Cooperated with hardware test devices, using the modified propagation model
and real data collected by test hardware.
第（13）页
http://WM.tongji.edu.cn
WM Lab, Tongji Univ.
 Future Wireless Broadband Test Environment
Parameters of Future Wireless Broadband
Wireless Access Sketch Maps
 Platform of Wireless Access Scenarios
Simulation of Relay & Distributed Networks
Approach to Real World
 Test Methodology
Simulation Platform Associated Application Traffic Test
Combination with Wireless Test Hardware
 What Can We Test
第（14）页
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What Can We Test
WM Lab, Tongji Univ.
 Coverage
 Capacity
 Mobility
 Qos
第（15）页
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Coverage Test
A
WM Lab, Tongji Univ.
A
Objective：
•Validate network planning , and find the
blind spot and the empty area of network
coverage.
•Compare the coverage of the different
service channel to verify the theoretical
results.
•Through the test results of the same type
of service in different wireless
communication environment , verify the
impact of the various parameters in the
link budget.
第（16）页
B
B
http://WM.tongji.edu.cn
Capacity Test
WM Lab, Tongji Univ.
Objective：
• In the actual environment, verifying if the number of largest
access users can reach or close to theoretical value. Test
environment includes static and dynamic situations.
• In the test, every test should use the number of the largest
users which meet QoS requirements as the determining
principle of cell capacity.
第（17）页
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Capacity Test
WM Lab, Tongji Univ.
content：
• Capacity test can be considered as throughput test. It
includes throughput test of Single-user area and Multiuser area, and can be both mobile and fixed-point test.
– a single-user movement test does research on MS loading
operations when moving from BS to marginal areas(Speed:2040km/h). (radial-forward extrusion coverage)
– Multi-user movement test does research on MS in the near,
medium and far distance, with the speed of movement along the
loop. (loop coverage)
• Test environment can be divided into work and load
conditions in single area and the adjacent areas.
– Plot test of Single-user and multi-user area in the adjacent areas are
50 per cent of the loading conditions in near, medium, far plot
under C / I identify. (Near: 10 dB +; medium :5-10 dB; far :0-5 dB.)
第（18）页
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Mobility Test
WM Lab, Tongji Univ.
•
•
•
•
All IP Based Network;
Mobile IP Technology;
Multi-Cell Handover;
In a Heterogeneous Network(Next Step).
第（19）页
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Qos Test
WM Lab, Tongji Univ.
• QoS test depends on the service types of different
networks.
• KPI (Key Performance Indicators) of QoS test include
throughput , delay, jitter, BER/FER, etc.
第（20）页
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Network Performance Evaluation
WM Lab, Tongji Univ.
Qos
Mobility
Service Planning
Coverage
Capacity
Network Planning
Performance Report
第（21）页
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WM Lab, Tongji Univ.
第（22）页
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