TDHSDPA IN CHINA DTmobile COMMUNICATIONS EQUIPMENTS CO LTD

TD-HSDPA IN CHINA DTmobile COMMUNICATIONS EQUIPMENTS CO. LTD April, 2006

CONTENTS DTmobile Overview； TD-HSDPA Complete Solutions and Products； DTmobile TD-HSDPA Milestones; TD-HSDPA in China

Overview of DTmobile ● About DTmobile TD-SCDMA system equipment supplier Network establishment service provider TD-SCDMA total solution provider TD-SCDMA international standard pioneer TD-SCDMA test handset provider TD-SCDMA terminals solutions provider Taking advantage of its excellent innovation and long-term accumulation, DTmobile is dedicated to the research and development of TD-SCDMA. On the basis of its self-owned core intellectual property right and complete series of products, DTmobile is committed to providing total solutions to customers wherever they are.

TD-SCDMA Milestones In China 8 Year Development Path （1998~2006） Market Application Phase Product Development Phase Products network tests were completed in H 1 05, and all will be ready for market in 2006. The research of technology migration path has already started. Kicked off with the establishment of DTmobile on Feb. 2002. The process lasted until the end of 2004. Technology Two phases of MTNet tests, including indoor and field Testification Phase tests, were completed from 1999 to 2002. Standard TD-SCDMA standard was proposed in July 1998 and accepted by Development Phase ITU and 3 GPP respectively by the end of 2001. China Academy of Telecommunications and Technology (CATT) submitted TD-SCDMA proposal to the ITU on behalf of the Chinese government in June 1998. DTmobile, as the sub company of CATT, is involved in TD-SCDMA R&D, industrialization and commercialization in China and throughout the world.

TD-SCDMA Industry Chain DT Mobile: Key force of the TD value chain T 3 G, Commit, Jiazai CN providers Chipset makers Joint lab Investment Technology Manufacturing Total Solutions DTmobile Operators, etc. Technology RAN manufacturers Joint R&D TD-SCDMA testing instrument suppliers Alcatel Solutions UE and chipset makers

Industry Accomplishment Tests & Trials MTNet Tests 2002 -2004 To verify the basic functions Industrialization Special Test 1 H, 2005 To evaluate the overall performance of the network Pre-commercial Trial ongoing Large scale, with full coverage and real users; expected to be the last step before commercial rollout

CONTENTS DTmobile Overview； TD-HSDPA Complete Solutions and Products； DTmobile TD-HSDPA Milestones; TD-HSDPA in China

Why to Choose TD-HSDPA? • • Optimally enhance the performance of TD-SCDMA system Maximally guarantee backward compatibility and the scalability of system Provide flexibility to guarantee the most efficient use of resources ONLY need software upgrade to smoothly migrate from TD-SCDMA R 4 to TD-HSDPA • • • The peak rate of TD-HSDPA may reach N* 2. 8 Mbps (N=number of carriers) when UL/DL timeslot ratio is 1: 5. The peak rate 16. 8 Mbps, already higher than the 14. 4 Mbps of WCDMA-based HSDPA, can be reached on 10 MHz bandwidth. As to WCDMA based HSDPA, if on 10 MHz, requires continuous 5 MHz timeslots on UL and DL respectively, while TD-HSDPA may take use of 6 separated carriers (1. 28 MHz each). Considering the limited frequency resource, this is an obvious advantage of TD-SCDMA over WCDMA. Regarding the deployment of both R 4 and HSDPA networks, the narrow bandwidth based TD-HSDPA has many advantages on the efficiency of resource allocation and the simplicity and flexibility of configuration over WCDMA HSDPA.

What is HSUPA? – The targets are, • to greatly enhance UL transmission bit rate • to better support interactive, background and streaming services • to reduce time latency on interaction – Key technologies adopted for enhanced UL performance include: • • • Adaptive modulation and coding (AMC), Hybrid ARQ, NB control and scheduling, Fast allocation of dedicated/shared resource, and The relevant support mechanism of physical-layer and high-layer signaling

TD-SCDMA Total Solution

TD-SCDMA RAN Products Micro NB Indoor Macro NB Outdoor Macro NB RNC

DTmobile UE Equipment 6 4 5 2 1 3 1 Test UE Hummer V 1 2 Test UE Sparrow V 1 3 Commercial PC card Hummer V 2 4 Pecker V 1, provided to system suppliers and operators for test use 5 Low-end commercial handset Swallow V 1 6 High-end commercial handset Culver V 1

Network O&M i. NOMS (Intelligent Network Operation & Maintenance Solution) NETWORK OPTIMIZING TOOL ROAD TEST TOOL NETWORK PLANNING TOOL

CONTENTS DTmobile Overview； TD-HSDPA Complete Solutions and Products； DTmobile TD-HSDPA Milestones; TD-HSDPA in China

TD-SCDMA HSDPA&LTE Roadmap DTmobile TD-HSDPA Roadmap TD-HSDPA Singe Carrier Demo 2005/4 Q Singe Carrier Release 2006/1 Q TD-SCDMA Multi-carrier HSDPA Release 2006/3 Q TD-SCDMA LTE

CONTENTS DTmobile Overview； TD-HSDPA Complete Solutions and Products； DTmobile TD-HSDPA Milestones; TD-HSDPA in China

DTmobile Support Boosts TD-HSDPA TD-SCDMA HSDPA Singe carrier HSDPA Muti-carrier HSDPA - Theoretical peak rate of 2. 8 Mbps on 1. 6 MHz bandwidth (DL 5 timeslots) - TD-SCDMA multi-carrier technology is featured by the flexible configuration of resources, the backward compatibility with the current TD-SCDMA network, and the solution to effectively meet the requirement on largecapacity and high-speed data transmission. TD-SCDMA LTE Two proposals submitted by DTmobile to 3 GPP for evaluation • TD-SCDMA multi-carrier solution, as a short-term goal, emphasizes smooth migration and provides enhanced TDSCDMA system performance. • TDD-OFDM solution is a long term TD-SCDMA evolution plan which aims at a total performance enhancement.