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01 HSDPA Principles Page 1 Page 1 HUAWEI TECHNOLOGIES Co , Ltd Huawei Confidential The Overview of HSDPA (High Speed Downlink Packet Access) Page 2 Page 2 HUAWEI TECHNOLOGIES Co , Ltd Huawei Confident.
The Overview of HSDPA (High Speed Downlink Packet Access) HUAWEI TECHNOLOGIES Co., Ltd Huawei Confidential Page Page Outline Introduction HSDPA New Techniques Transport and Physical Channels Spreading, Modulation and Coding Protocol Architecture Terminal Capabilities HUAWEI TECHNOLOGIES Co., Ltd Huawei Confidential Page Page HSDPA Bit Rate Advantage Typical average bit rate for different technologies in a medium loaded Macro cell 2000 1800 1.5 Mbps 1600 1400 1200 kbps 1000 700 kbps 800 400 kbps 600 350 kbps 400 200 150 kbps 30 kbps GPRS HUAWEI TECHNOLOGIES Co., Ltd EDGE WCDMA EV-DO Huawei Confidential EV-DV HSDPA Page Page HSDPA Latency Advantage Typical average round trip time for different technologies Smaller round trip times would benefit interactive applications 700 650 ms 600 500 ms 400 300 200 ms 200 100 ms 100 GPRS/EDGE R99 HUAWEI TECHNOLOGIES Co., Ltd WCDMA R99 Huawei Confidential HSDPA R5 Page Page HSDPA Considerations The same carrier can be shared between WCDMA and HSPDA It’s the DL power which should be intelligently divided between two services Unlike 3GPP2 standards, EV-DO and IS-95/1xRTT, which can not share a carrier An evolutionary rather than a revolutionary philosophy WCDMA networks can be upgraded with HSDPA hardware/software on Node-B by Node-B basis Even HSDPA features can be added gradually, if required Priority to urban environments and indoor deployments Support full mobility but should be optimized for low and medium speed users Focus on streaming, interactive and background services HSDPA new features should show significant incremental gains over existing R’99 performance Consider value added to the user, cost to the operators, increased revenue for operators, etc., in adding any new feature HUAWEI TECHNOLOGIES Co., Ltd Huawei Confidential Page Page Outline Introduction HSDPA New Techniques Transport and Physical Channels Spreading, Modulation and Coding Protocol Architecture Terminal Capabilities HUAWEI TECHNOLOGIES Co., Ltd Huawei Confidential Page Page Power Utilization in HSDPA Efficient use of power: the unused power by dedicated/common channels is exploited by HS-DSCH with use of dynamic power allocation HUAWEI TECHNOLOGIES Co., Ltd Huawei Confidential Page Page Channel Sharing in HSDPA Efficient use of time: several packet data streams are time multiplexed and sent over High Speed Downlink Shared Channel (HS-DSCH) HUAWEI TECHNOLOGIES Co., Ltd Huawei Confidential Page Page Major New Techniques Fast Scheduling Fast Hybrid ARQ Fast Link Adaptation HUAWEI TECHNOLOGIES Co., Ltd Huawei Confidential Page Page Fast Scheduling HUAWEI TECHNOLOGIES Co., Ltd Huawei Confidential Page 10 Page 10