TD-SCDMA系统中HSDPA技术的实现

The Realization of the HSDPA Technology in the TD-SCDMA System

HSDPA是一些无线增强技术的集合,利用HSDPA技术可以在现有技术的基础上使下行数据峰值速率有很大的提高。HSDPA主要是通过引入高速下行共享信道(HS-DSCH)增强空中接口,并在UTPAN中增加相应的功能实体来完成的;引入自适应调制编码(AMC)和HARQ(混合ARQ)技术来增加数据吞吐量;增强NodeB的处理功能,在NodeB的MAC层中引入一个新的MAC-hs实体,专门完成HS-DSCHR的相关参数和HARQ协议等相关处理,在高层和接口加入相关操作信令。

HSDPA is the integration of some wireless enhanced technology and the use of the HSDPA technology can increase the rate of the downlink data maximum based on the present technology. This paper introduces that HSDPA can be completed through the introduction of HS-DSCH to enhance the space interface and the relevant functions in UTPAN. From the underlying layer, it is completed through the introduction of the technology of AMC and HARQ （combined ARQ） to increase the data handling capacity. From the whole framework, HSDPA can mainly enhance the handling function of Node B, introduce a new MA C-hs entity in the MAC layer of Node B, and complete the handling of the relevant parameters of HS-DSCHR and the negotiation of HARQ to insert the relevant operation signal in the high layer and interface.