HSDPA UMTS Training Group Version 3.0
HSDPA速率(阿卡)
Li Yong 2009-2
目录
概述 关键技术 吞吐量计算 保定HSPA测试结果
目录
概述 关键技术
吞吐量计算
保定HSPA测试结果
认识HSDPA
HSDPA （High Speed Downlink Packet Access）
一种旨在增强下行链路数据传送速率的的无线技术
快速调度（Fast Scheduling) （1/3）
快速调度工作在时域： “多用户分集”
给用户分配2ms的传输时 隙Transmission Time Interval (TTI) 传送基于:
–
Scheduled user
User 1 Es/No
User 2 Es/No
–
–
信道质量，负载 话务优先级 UE 反馈 (ACK/NACK)
适配不同的SIR 在理想的无线环境中，提供较高的峰值数据速率
适于更高的吞吐量和适配link budget的改变
自适应调制编码Adaptive Modulation and Coding(2/5)
自适应调制编码Adaptive Modulation and Coding(3/5)
自适应调制编码Adaptive Modulation and Coding(4/5)
In the following, only HSDPA phase 1 is considered
HSDPA: 新的物理信道
HS-Physical Downlink Shared CHannel (HS-PDSCH) 下行 User data on the
HS-PDSCH (DL) & Signalling on the HS-SCCH (DL)
WCDMA_HSDPA_HSUPA_HSPA_LTE
6
© Rohde & Schwarz 中国培训中心 – xxxxxx基本原理和测量
讲师名称：
3GPP2发展路线
3GPP2
IS-95 (cdmaOne) cdma2000 1X
1XEV-DV Rev C/D 1XEV-DO Rev 0
OFDM + MIMO
1XEV-DO Rev A 1XEV-DO Rev B
1/T s = Data Rate 1/T c = Chip Rate
Direct sequence CDMA transmitter & receiver
Bt = Transmission bandwidth Bi = Information bandwidth
CDMA_PRI_10.VSD
20
© Rohde & Schwarz 中国培训中心 – xxxxxx基本原理和测量
The The
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© Rohde & Schwarz 中国培训中心 – xxxxxx基本原理和测量
讲师名称：
Multiple Access
CDMA
Thank you very much
The sun shines nicely today (kyou haii tenki desu ne)
CDMA
Channel 15 ksps
3.84 Mcps
Despreading
Processing gain
256
Processing gain increases with the spreading factor
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© Rohde & Schwarz 中国培训中心 – xxxxxx基本原理和测量
HSDPA解决方案
HSDPA解决方案HSDPA（High-Speed Downlink Packet Access）是一种高速下行分组接入技术，用于移动通信系统中的数据传输。
它是3G网络中的一种演进技术，旨在提供更高的数据传输速率和更好的用户体验。
HSDPA解决方案是指为实现HSDPA技术而采取的一系列措施和技术方案。
HSDPA解决方案的核心目标是提供更快的数据传输速率和更高的网络容量。
为了实现这一目标，HSDPA解决方案采用了以下关键技术：1. 增加调制方式：HSDPA引入了新的调制方式，如16QAM和64QAM，用于提高数据传输速率。
这些调制方式可以在相同的频谱资源下传输更多的数据，从而提高网络容量。
2. 使用多径补偿技术：移动通信信号在传播过程中会受到多径效应的影响，导致信号衰减和干扰。
HSDPA解决方案采用了多径补偿技术，通过接收端的算法来抵消多径效应，提高信号质量和传输速率。
3. 频谱分配和调度优化：HSDPA解决方案通过优化频谱资源的分配和调度，实现对不同用户和应用的灵活支持。
它可以根据用户的需求和网络负载情况，动态分配和调度频谱资源，以提供更好的用户体验。
4. 增强的调制解调器：HSDPA解决方案中使用了更先进的调制解调器，以支持高速数据传输。
这些调制解调器具有更高的计算能力和更快的信号处理速度，可以实现更高的数据传输速率。
5. 支持快速重传和混合自动重传请求：HSDPA解决方案支持快速重传和混合自动重传请求，以提高数据传输的可靠性。
当数据包丢失或出错时，系统可以快速进行重传，减少传输延迟和数据丢失率。
6. 引入调度算法：HSDPA解决方案引入了新的调度算法，以实现对不同用户和应用的智能调度。
这些调度算法可以根据用户的需求和网络负载情况，动态调整传输优先级，提高网络资源的利用效率。
通过采用上述技术和措施，HSDPA解决方案可以实现更高的数据传输速率和更好的用户体验。
它可以支持更丰富的移动应用，如高清视频流媒体、在线游戏和实时语音通话等。
UMTS基本原理及演进过程(蓝光教材)
最终扩频速率和比特速率的比 在WCDMA系统中，根据提供业务的不同，处理增益是 可变的
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文档密级：内部公开
UMTS技术特点 WCDMA的信道编码
信道编码的作用：增加比特间的相关性，以便在受到干扰的情况
下恢复信号
编码类型及编码率
语音业务：卷积码（1/2、1/3），约束长度为9，加8个尾比特
信源 解码
解扰
解调
射频 接收
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文档密级：内部公开
UMTS技术特点 常用术语
比特（Bit），符号(Symbol)
，码片 (Chip)
经过信源编码的含有信息的数据称为“比特”
经过信道编码和交织后的数据称为“符号”
经过最终扩频得到的数据称为“码片”
处理增益
UMTS技术特点 WCDMA的发射分集
前向链路容量是当前CDMA蜂窝系统容量的瓶颈，WCDMA 标准在发射分集上的应用上进行了深入பைடு நூலகம்研究，提出了新的 发射分集方案，提高前向链路容量；
开环发射分集
基于时空块编码的发射天线分集（STTD） SCH上的时间切换传输分集（TSTD）
闭环发射分集，FBI 域
UMTS技术特点
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文档密级：内部公开
UMTS技术特点
多址技术和双工技术
CDMA基本原理 WCDMA 关键技术
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文档密级：内部公开
UMTS技术特点
双工技术：
时分双工：TDD 频分双工：FDD
多址技术：
TD-SCDMA无线通信系统的HSDPA业务优化
是为 了满足 高速 下行数据 业务 而设计
的 ，它 在 原 有 网 络 结 构 的 基 础 上 增 加
的功率调 整进行 了测试和相关 规律 的
总 结 ，可 作 为 网 络 侧 功 率 参 数 设 置 的
显。
了自 适应编码Ａ Ｃ 动混合重传 依据。 Ｍ 和自 测试场 景分为高 业务量区域、 低
ｉ１ 行 ， ， 巾 于 使 刚 Ｈ 载 波 做 卞 ｑ． ｑ ＇ Ｊ ｌ ，
和 Ｒ ４频 点 分 配 、 Ｉ Ａ 频 点 和 ＨＳ） Ｐ Ｒ ４频 ，－ ｃ７ 合川 作 丰载 波 的频 率 规 划 原 Ｖｌ ？ ： ０ ， 到 ＿良好 的效 ． ｛收 『 Ｊ ｒ ．
洒 过 蘩 ． ｔ 刚 对 比 Ｈ载 频做
化；Ｍ管侧统 ｊ可 以 厅… Ｈ做 载频 ｌ
对ＢＥ Ｌ Ｒ改善不 明显 ， 测试结果受忙 闲 时 间段的影响 比较大 ； 高话务 量 区域 ， 载频 Ｈ —ＤＣ 单码道功率参数越 Ｓ Ｐ ＳＨ 大， Ｈ业 务下载速 率会 略有改善 ， 是 但
１ 个载频 的 ＨＳ Ｐ Ｄ Ａ功能 ，每载频 配置
３ Ｈ —ＤＣ 个 Ｓ Ｐ Ｓ Ｈ时隙。 频率的规划和优 化 Ｔ Ｄ系统 目前可使用 的频率资源有 限 ， 可 以 作 为 主 载 波 的 频 点 只 有
诳 好 露 憋
震
点 袋爨予 Ｈ Ｄ Ａ承 Ｓ Ｐ
的缎 缝 努 此 阁
～ Ｃ ＭＡ 蠢 缓 络 优 他 王 谁 也 必 矮 坚 持 以 市场 需 蕊 为黪 渤 Ｓ Ｄ Ｈ Ｄ Ａ 犍 务 能 优 能 是 秘黼 Ｓ Ｐ
是 照 努 震 需 ；以 鬣 为 禳 心 ，
Ｔ — Ｃ ＭＡ阏络优 傀的主 鬟工作 蠢淘 Ｄ Ｓ Ｄ
TD-HSDPA基本原理
流媒体
HS-DSCH 高；需要 保证比特 速率
较低时延
互动类
背景类
低
无要求
低时延
很长时延
高
很高
较少
有空闲 资源即 可 较多
实时话音 DCH
很低
低时延
低
课程内容
HSDPA概述 HSDPA基本原理 HSDPA信道
HSDPA信道
HSDPA引入了一条新的传输信道，即高速下行链路共享信道HSDSCH，以承载高速下行数据业务，其对应的物理信道为HSPDSCH、HS-SCCH和HS-SICH。 另外，HSDPA使用原R4 DCH传输信令，其信道为伴随DPCH。
HSDPA技术优势介绍3
优点：提高了传输的可靠性 缺点：信道条件好时，信道 利用率不高 优点：误码率不高时作用明显 缺点：误码率高时，效率低
发送
数据包A
F E C
A R Q
H A R Q
结合FEC和ARQ，在发送的每 个数据包中含有纠错和检错的 校验比特 发送
数据 包A
接收
保留
错误数据 包A
接收
丢弃
HS-DSCH FP协议
新增物理信道
HSDPA新增子层、物理信道和协议
引入HSDPA后的架构变化
RNC
MAC-d MAC-sh HSDPA 的分组调度从 RNC移到了Node-B
Iub
Node-B MAC-hs
CQI,Ack/Nack,TPC CQI,Ack/Nack,TPC
CQI,Ack/Nack,TPC
S类业务为IPTV、视频点播等流媒体业务； I类业务为网络教育、手机银行、在线游戏、位臵服务等， 为用户请求—服务器响应模式业务； B类业务为数据下载、E-mail、SMS等时延不敏感、差错 敏感业务。
PRODUCT
PRODUCTEee Pad，变形!华硕Eee Pad Transformer 关注华硕Eee Pad家族的朋友们注意了，华硕Eee Pad Transformer平板已经上市销售。
在配置上，Eee Pad Transformer和传统的平板并无太大差别，采用的是10.1英寸屏幕，搭载Android 3.0操作系统，配置Tegra 2芯片，采用1G8 DDR2内存。
值得一提的是，这款平板并非类似于iPad那样的产品，实际上是由两部分组成，屏幕部分相当于一款类似iPad的平板，连接底座(Docklng)后可以当作笔记本电脑来使用。
该底座不仅带有键盘和触控板，还提供了US8接口和SD读卡器，电池续航时间也增加了一倍，很适合而务人士。
操作系统：Android 3.0 网络制式：HSDPA ／UMTS／GPRS 本机容量：16GB 屏幕：10.1英寸、1280×800、TFT屏摄像头：500万像素／120万像素无线连接：Wi-Fi／蓝牙2.1 待机时间：8小时尺寸：271mm×177mm×13mm 重量：690g(含电池) 参考价格：未定价首款Tegra 2手机LG Optimus 2x 在今年CES展会上大出风头的LG Optimas 2X智能手机，继韩国和欧洲上市后，如今已正式登陆中国市场。
作为首款采用NVIDIA Tegra2芯片的正式产品，根据Quadrant Advanced Edition的测试结果，Optimus 2x的总成绩达到了2637，几乎是DroidX以及Galaxy S的两倍以上，其性能着实令人刮目相看。
不仅如此，它还拥有4英寸IPS显示屏、支持多点触控、分辨率为480×800，支持1080p拍摄、miniHDMI输出以及首款支持7.1多声道虚拟环绕声的移动设备等光环，非常值得近期打算购买高端Android智能手机的每一位用户关注。
操作系统：Android 2.2 网络制式：HSDPA／UMTS／EDGE／GPRS／GSM 本机容量：8GB 屏幕：4英寸480×800、IPS 屏摄像头：800万像素无线连接：Wi-Fi／蓝牙2.1 待机时间：440小时(3G) 诵话时间：6小时(3G) 尺寸：63.2mm×123.9mm×10.9mm 重量：139g(含电池) 参考价格：未定价平板也玩跨界蓝魔音悦汇T20 双系统在平板产品中屡见不鲜，其中大多是“Andreid+Windows”组合。
华为HUAWEI数据卡常见问题解答说明书
Huawei Data Card FAQQ：Which OS can the Data Card support?A: Now the Data Card can support Windows 2000, Windows XP, Windows Vista，Windows 7, Mac OS.Q: When HUAWEI Data Card connected to computer, how can I confirm the HUAWEI Data Card has been identified?A: Use the device-manager can confirm that:1.Open control panel, select capability and maintenance.2.Select system3.Open the hardware, select device-manager4.Unfold the Modem and ports. Confirm that if there are HUAWEI MobileConnect 3G Modem and 3G PC UI Interface. These devices show that whether the HUAWEI Data Card has been identified.Q: The computer cannot find any new hardware when the HUAWEI Data Card connected to PC. So how can I do?A:1.Change another USB port.2.If you changed another USB port, but the computer still cannot find any newhardware. Please contact local Operator or agent to change your theHUAWEI Data Card.Q: When the HUAWEI Data Card connected PC, the system identified the virtual CD-ROM and installed the dashboard, but the computer cannot find any new hardware. How can I do?A:1. First check that the device-manager has identified USB Mass Storage but noother Modem device.2. Use the devsetup.exe which you can find in the Drivers folder to mapping the modem a port.Q: When the HUAWEI Data Card connected to the computer, the system identified the virtual CD-ROM and installed the dashboard, and the computer find the new hardware, but if you choose to auto search drivers, the computer cannot install the drivers. How can I do?A:1.Re-plug the HUAWEI Data Card, when the computer find the new hardware,selects the right path in manual to install. The folder is the Drivers folder which you can get it in the dashboard folder.2.And also you can use the driverUninstall.exe to uninstall the drivers and thenuse driversetup.exe to install the drivers.Q: When I uninstalled the dashboard in Windows Vista, then re-plugged the HUAWEI Data Card, and the system find the new hardware, but I cannot install the drivers. How can I do?A: The system can identify Huawei Mobile device, and you cannot install drives. Firs you should go to the path system dir to find the INFCACHE.1 file. And if the INFCACHE.1 file is less than 6K, that means the INFCACHE.1 file of Vista has been destroyed when you uninstalled the HUAWEI Data Card dashboard. To solve this problem, Microsoft will release a patch. You can get help from the Local Service of Microsoft.Q: When THE HUAWEI Data Card was plugged into the computer, thesystem would be dead or run slowly or cannot open the virtual the HUAWEI Data Card CD-ROM. SO how can I do?A: For these questions, maybe some other software or services which have been installed are conflicted with the HUAWEI Data Card.To get the cause:1.Run the msconfig in the star-menu to open System configuration Utility.2.Choose Services in System configuration Utility, and then select Hide All Microsoft Services and Disable All. At last choose apply and reboot system.3.Re-plug the HUAWEI Data Card into the computer, if the system run ok, that means some software or service conflict with THE HUAWEI Data Card. You can start the service one by one to find which conflict with the HUAWEI Data Card. And then you can solve the problem by uninstalling the software.4.If you disable all service, but the problem is still on. Please contact the localOperator or agent for helps.Q: When the HUAWEI Data Card connected with the computer, the system installed the dashboard, but there are some ports conflicted. So how can I do?A: Check the ports in the device-manager, that the data-card shared the same port with another device made the data-card cannot connect to internet.For this problem, you can solve it by changing the port which the device used as follows:1.Open the device-manager, right-click the conflicted device, choose theproperties.2.Open the ports-setting in the property dialog-box, select advanced.3.Then select the pull-down list, select another unused port. And then clickOK.Q: What¡s the meaning of the HUAWEI Data Card LED flashed at every mode?A:1. Power On----Green, blinking twice every 3s2. GPRS（GSM/GPRS/EDGE）Registered----Green, blinking once every 3s3. UMTS（WCDMA/HSDPA/HSUPA）Registered----Blue, blinking once every 3s4. GPRS/EDGE Connected----Green, always on5. WCDMA Connected----Blue light steady6. HSDPA Connected----Cyan light steady7. USB hardware removed----LED offQ: How could I inquire the version of the dashboard and the firmware? A:1.Open the dashboard, select Help→About, you can get the version of thedashboard2.Select Tools → Diagnostics, you can get the version of the firmwareQ: When I connect the HUAWEI Data Card with computer, why the dashboard cannot start automatic?A:During the Windows XP and Windows 2000, Click the Start Run, and enter the gpedit.msc to open the Group policy. Please check whether the Turn off Autoplay was disabled. You can set the Turn off Autoplay enabled or not configured in the properties.Q: After my computer weak up from stand by, why the HUAWEI Data Card cannot be recognized by system?A:Yes. The HUAWEI Data Card can be recognized after restart the computer.Q: HUAWEI Data Card will not create the CD-drive correctly or will continually pickup and drop the modem hardware on a HP Pavilion laptop?A:On XP, Disable qpservice from the services list (Start - control panel - Admin tools - services)On Vista, Disable HP Quick play service from the services listThis Service controls the Quick play buttons situated above the keyboard on the laptop and allow the user to starting quickly, stop and control media files.Disabling this service stops these keys from functioning however it does allow the EHUAWEI Data Card to function perfectly.This has resolved 100% of cases seen on HP Pavilion laptops! (Vista & XP)Q: HUAWEI Data Card will not create the CD-drive correctly or will continually pickup and drop the modem hardware on a computer running Windows XP Media Centre Edition?A:Disable the Media Centre Extender Service.We are currently investigating the functions of this service but believe it to be very similar to the HP service mentioned in the previous issueDisabling this service has resolved the large majority of issues with XP Media Centre Edition.Q: HUAWEI Data Card will not create the CD-drive correctly or will continually pickup and drop the modem hardware on a Windows XP & Vista laptopA:Option 1 (XP & Vista)Stop all Non Microsoft services and all startup items using MS config, then reboot the laptopAfter reboot the Device is then found correctly and the modem then installs.This fix only works in about 5% of the cases.Option 2 (Vista Only)Download a copy of the EHUAWEI Data Card software from our Web server (/3ie)Unzip and install on the customers laptopPlug in the modemIn Device manager: Manually update the Mass storage device to a USB Composite deviceQ: HUAWEI Data Card cannot be recognized by Vista and cannot automatically runA:Option 1(vista only)Check the size of the file \** \windows\inf\infcache.1,if the size of it is only a few KB. Please install the patches of Windows Vista:Windows6.0-KB937187-x86.msuWindows6.0-KB937187-x64.msu.Reboot your PC.And you can get the patches from us--------------------Option 2(vista only)Check if the file \**\windows\inf\usbstor.inf existes, if NOT, find the unrecognized device mostly showed as Huawei mobile and manually update the driver:Select the device in device manager andClick the right button of your mouse-update driver and then manually select the driver in folder \mass storage you get from us.Reboot you computer.If the modem still cannot auto running, then manually install the driver in the folder \CDROM then reboot. You can get the driver from us.Q: Click the connection from the website, there appears a blank website which can not be shutdown.A:Cause by the operator¡s network.Use the same data card to login the website via different networks.Use different data cards to login the website via the same network.Q: When users dialup the internet via the datacard, the speedrate is slow. Caused by the background software.Use the original dialup software from Windows, and make a speedrate comparison with the data card,Modify the background software.Q: The data card of Hong Kong customer has no signal in Macao, but the SIM card can search network in handsetA:The SIM card set the network which forbids it to configure into the list of forbidden automatically.When the SIM card can be configured after renovating the network, we must get the network out of the list of forbidden manuallyQ: When I want to do dial-up, what is the mean of fail code 619?1) Weak SignalMake a comparison test at the Strong Signal section.2) Configuration failure of the APNCheck the configuration of the APN in the Dashboard，make sure that there is no add-configuration which has been set.Set the APN correctly, disable the add-configurationQ: How about the temperature limit during HUAWEI Data Card operating? A:The HUAWEI Data Card can be used between ¨10℃to +45℃Storage: ¨20℃to +70℃.Q: It takes a long time to install the dashboard in windows XP, May I know what the reason is?A：Your computer may be doing a through driver search during installation. Therefore, please do not choose the option¡ search driver on networks¡ during installation or abandon the net service.Q: What shall I do if I cannot access internet?A：Please check the configuration as follows:●Make sure that E220 is in the service area and the network signal is normal.●Make sure you have subscribed to the wireless access service. For details, consultyour service provider.●If you have subscribed to the wireless access service, refer to ¡internet service¡ toconfigure the network settings.●If it shows screens as below, please try to connect again and again, because thenet is busy now.●If it fails again, please re-install the TCP/IP protocol and have a try.Q: Data card can not be recognized by Vista or can not automatically install after uninstall.A：The problem shows picture as below1)Vista only:●Check the size of the file \** \windows\inf\infcache.1.●If the size of it is only a few KB. Please install the patches of WindowsVista:Windows6.0-KB937187-x86.msuWindows6.0-KB937187-x64.msu.Reboot your PC.And you can get the patches from us2)Vista only:●Check if the file \**\windows\inf\usbstor.inf exists, if NOT, find theunrecognized device mostly showed as ¡Huawei mobile¡ and manually update the driver.●Select the device in device manager and Click the right button of yourmouse-update driver and then manually select the driver in folder \mass storage you get from us.●Reboot you computer.●If the modem still cannot auto-run, then manually install the driver in the folder\CD-ROM, then reboot.You can get the driver from us.Q: will the information of messages, contacts, etc. be lost after dashboard uninstalled.A：No, SMS, contacts information is stored in the file named vWTP.MDB, so, please do not delete this file, the information can be read out when you install the dashboard again.Q: HUAWEI Data Card installs OK and customer SIM card has signal however the connect button shows grey out?A:This issue has been seen on a number of laptops running Norton internet security. Exact versions of this are not yet known and the only known solution is to disable Norton however this has not worked in 100% of cases。
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Hybrid ARQ (HARQ)
• • • • • ARQ = Automatic Repeat Request – uses error detection to determine if a PDU is received in error Hybrid ARQ uses forward error correction as well as error detection resulting in improved performance over ARQ. Employed between the UE and the Node B UE transmits ACK/NACK to indicate the successful / unsuccessful reception of a PDU. HARQ round trip time is longer (approx. 12ms) than a TTI period and as such multiple HARQ processes are used to prevent waiting for ACK/NACK before sending the next PDU Retransmissions are combined with original transmissions using soft combining (called chase combining) to improve error correction.
New terminal functions:
• 16 QAM demodulation
• HARQ decoding and Retransmissions Handling • Buffering & Soft combining • Fast Uplink Feedback Generation & encoding
HSDPA High Speed Downlink Packet Access
UMTS Training Group Version 3.0
Proprietary and Confidential
Introduction
• • • HSDPA – High Speed Downlink Packet Access Part of release 5 3GPP specifications HSxPA can also be referred to as 3.5G as it is an adaptation of the 3G standards HSDPA increases air interface data rates from 384kbps to 14Mbps
• A-DCH – Associated Dedicated Channel
– – – – One A-DCH is required per HSDPA user Carries signaling and uplink data Typically has a downlink rate of 0 Uplink rate can vary, minimum is 64kbps up to 384kbps and peak HSDPA rates will require EUL – Uplink data rate usually 5-6% of downlink rate (higher layer signaling).
Proprietary and Confidential
Slide 3
HSDPA Channels - New
• HS-PDSCH – High Speed Physical Downlink Shared Channel
– – – – Carries user data 1 – 15 codes per channel Always SF16 QPSK or 16QAM
New NodeB HSDPA Functionality
RNC Packets Flow Control Node B Terminal
Scheduler & Buffer
HARQ & Coding
ACK/NACK & Feedback Decoding
• Scheduler & Buffer: Buffering of data, Terminal scheduling, Coding & Modulation selection – QPSK is still used and a new modulation type 16QAM introduced • HARQ, Retransmission Handling and coding • Uplink Feedback Decoding • Flow Control towards the SRNC
0111
QPSK 2 bits / symbol 480 kbit/s/HS-PDSCH max. 7.2 Mbit/s
16QAM 4 bits / symbol 960 kbit/s/HSPDSCH max. 14.4 Mbit/s
Proprietary and Confidential
Slide 11
Proprietary and Confidential
Slide 8Leabharlann UE Categories
•
•
12 Categories of UE have been specified
UE category is sent in the UE Capability message transmitted to RNC during call setup
Proprietary and Confidential
Slide 9
UE Categories
HSDPA Category 11 12 1/2 3/4 5/6 7/8 9 10 Modulation QPSK only QPSK only QPSK/16QAM QPSK/16QAM QPSK/16QAM QPSK/16QAM QPSK/16QAM QPSK/16QAM Transport Inter-TTI (MS) Block size (bits) 2 1 3 2 1 1 1 1 3630 3630 7298 7298 7298 14411 20251 27952 5 Codes 0.9 Mbps 1.8 Mbps 1.2 Mbps 1.8 Mbps 3.6 Mbps 10 Codes 7.2 Mbps 15 Codes -
•
Proprietary and Confidential
Slide 13
Hybrid ARQ and Soft Combining
NodeB
1-15 x HS-PDSCH
Associated DPCH
1- 4 x HS-SCCH
UE
Proprietary and Confidential
Slide 5
HS-DPCCH
HSDPA Protocol Stack
Proprietary and Confidential
Slide 6
•
Fast HARQ with soft combining
– Instead of handling all retransmissions at the RNC, a new HARQ process is introduced at the Node B to realize rapid retransmission of erroneous data
•
HS-DPCCH – High Speed Dedicated Control Channel
– – – ACK/NACK CQI report SF256
UE
Proprietary and Confidential
Slide 4
HS-DPCCH
HSDPA Channels - Existing
•
Fast Channel Dependent Scheduling
– Scheduler is implemented at the Node B as opposed to the RNC to allow for fast scheduling to accommodate the user environment.
• • • •
SF16 codes assigned to HS-PDSCH, 5, 10 or 15 (3GPP) SF128 assigned to the HS-SCCH (3GPP) (up to 4) Maximum of 15 codes in Ericsson and Nokia HS-PDSCH code resources are assigned to one user at a time
Proprietary and Confidential
Slide 7
New Terminal HSDPA Functionality
RNC Packets Node B
Terminal
16QAM demodulation HARQ decoding
Flow Control
ACK/NACK & Feedback generation Soft buffer & combining
Downlink HSDPA Code Allocations
SF=1 SF=2 SF=4 SF=8 SF=16 HS-PDSCH SF=32 S-CCPCH SF=64 S-CCPCH SF=128 SF=256 CPICH P-CCPCH HS-SCCH