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 Mainly focus on Test methodologies and Networking technologies

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 Here is the outline First is Second is The third one The last one is showing what we can test within our platform

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

Framework of Tongji 4G-Test Research The upper interface in the yellow part is combining with application layer, which generate real application data. The lower interface is cooperating with phy layer devices such as signal generator and signal analyzer.

Future Wireless Broadband Test Environment 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 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 BS-RN 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. Here is the NGWN parameter we work for several years, and conclude these parameters in many years hard work.

Future Wireless Broadband Test Environment Wireless Access Sketch Maps Relay Access: 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 Mainly is relay and distributed network as mentioned by my supervisor this afternoon. The relay network we researched is fixed relay access and a mobile relay access scenarios. And the distributed network is different from traditional distribution antenna, it’s a distributed cell by using a technology named virtual cell. We simulate it in our platform.

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 Now it’s our platform.

Simulation of Relay & Distributed Networks Broadband Wireless Access Simulation Platform 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. the upper picture shows many two-hops nodes, which can connect with each other by relay node. The router shown here is a access to ip back bone network. The lower picture shows a virtual cell conception, as we can see , one ms can be served by one or more different BSs simultaneously as the ms go around the center cell. We shown the handover by different color.

Approaching to Real World Platform of Wireless Access Scenarios 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. We get the propagation model/path loss function by testing in real environment, and get the result by computing the data. And we can have a simulation platform which approaching to real world.

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

Test Methodology Simulation Platform Associated Application Traffic Test The sender generate real data in a designed traffic model into our platform, the server get the real data and transform it to the ms by the different access technologies, and the ms can move along the white line with a VA speed model. The ms receive the data and transform it to the test receiver. So we can get the result generated by simulation platform and by analyzing the rel data.

Test Methodology Simulation Platform Associated Application Traffic Test Playing in local media server(Left) Playing in the receiver node with packet loss and delay(Right) Here is a vivid result, which comparison the original data and the result. The right picture is shown with packet loss and time delay. From OPNET

Test Methodology Combination with Wireless Test Hardware Cooperated with hardware test devices, using the modified propagation model and real data collected by test hardware.

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 Now, let’s have a look what can we test in our platform.

What Can We Test Coverage Capacity Mobility Qos

Coverage Test 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.

Objective： Capacity Test 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.

content： Capacity Test Capacity test can be considered as throughput test. It includes throughput test of Single-user area and Multi-user 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:20-40km/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.)

Mobility Test All IP Based Network; Mobile IP Technology; Multi-Cell Handover; In a Heterogeneous Network(Next Step).

Qos Test QoS test depends on the service types of different networks. KPI (Key Performance Indicators) of QoS test include throughput , delay, jitter, BER/FER, etc.

Network Performance Evaluation Qos Mobility Coverage Capacity Service Planning Network Planning Performance Report

Thank you