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DC-HSDPA与HSDPA区别
DC-HSDPA与HSDPA区别
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问题答案
回答者：qwerrazxs 回答时间：2012-08-28 00:19
58
491、
HSDPA（High Speed Downlink Packet Access)高速下行分组接入，是一种移动通信协议，亦称为3.5G(3½G)。该协议在WCDMA下行链路中提供分组数据业务，在一个5MHz载波上的传输速率可达8-10 Mbit/s（如采用MIMO技术，则可达20 Mbit/s）。在具体实现中，采用了自适应调制和编码（AMC）、多输入多输出（MIMO）、混合自动重传请求（HARQ）、快速调度、快速小区选择等技术。
2、 Dual-Cell HSDPA (also known as: Dual-Carrier HSPA or Dual-Cell HSPA) is a wireless broadband standard based on HSPA that is defined in 3GPP UMTS release 8.
Dual Cell (DC-
An advanced HSPA network can theoretically support up to 28 Mbit/s and 42 Mbit/s with a single 5 MHz carrier for Rel7 (MIMO with 16QAM) and Rel8 (64-QAM + MIMO), in good channel condition with low correlation between transmit antennas. An alternative method to double the data rates is to double the bandwidth, i.e. 10 MHz by using DC-HSDPA. Additionally, some diversity and joint scheduling gains can also be expected [2] with improved QoS for end users in poor environment conditions where existing techniques such as MIMO spatial multiplexing cannot be used to increase data rates. In 3GPP a study item was completed in June 2008. The outcome can be found in a technical report [3]. New HSDPA UE categories 21-24 have been introduced that support DC-HSDPA. DC-HSDPA can support up to 42Mbit/s, but unlike HSPA, it does not need to rely on MIMO transmission.
From Release 9 onwards it will be possible to use DC-HSDPA in combination with MIMO used on both carrier[4]. The support of MIMO in combination with DC-HSDPA will allow operators deploying Release 7 MIMO to benefit from the DC-HSDPA functionality as defined in Release 8. While in Release 8 DC-HSPDA can only operate on adjacent carriers, Release 9 allow that the paired cells can operate on two different frequency bands.
【中文介绍http://www.mscbsc.com/bbs/thread-264251-1-1.html】
HSDPA（High Speed Downlink Packet Access)高速下行分组接入，是一种移动通信协议，亦称为3.5G(3½G)。该协议在WCDMA下行链路中提供分组数据业务，在一个5MHz载波上的传输速率可达8-10 Mbit/s（如采用MIMO技术，则可达20 Mbit/s）。在具体实现中，采用了自适应调制和编码（AMC）、多输入多输出（MIMO）、混合自动重传请求（HARQ）、快速调度、快速小区选择等技术。
2、 Dual-Cell HSDPA (also known as: Dual-Carrier HSPA or Dual-Cell HSPA) is a wireless broadband standard based on HSPA that is defined in 3GPP UMTS release 8.
Dual Cell (
An advanced HSPA network can theoretically support up to 28 Mbit/s and 42 Mbit/s with a single 5 MHz carrier for Rel7 (MIMO with 16QAM) and Rel8 (64-QAM + MIMO), in good channel condition with low correlation between transmit antennas. An alternative method to double the data rates is to double the bandwidth, i.e. 10 MHz by using DC-HSDPA. Additionally, some diversity and joint scheduling gains can also be expected [2] with improved QoS for end users in poor environment conditions where existing techniques such as MIMO spatial multiplexing cannot be used to increase data rates. In 3GPP a study item was completed in June 2008. The outcome can be found in a technical report [3]. New HSDPA UE categories 21-24 have been introduced that support DC-HSDPA. DC-HSDPA can support up to 42Mbit/s, but unlike HSPA, it does not need to rely on MIMO transmission.
From Release 9 onwards it will be possible to use DC-HSDPA in combination with MIMO used on both carrier[4]. The support of MIMO in combination with DC-HSDPA will allow operators deploying Release 7 MIMO to benefit from the DC-HSDPA functionality as defined in Release 8. While in Release 8 DC-HSPDA can only operate on adjacent carriers, Release 9 allow that the paired cells can operate on two different frequency bands.
【中文介绍http://www.mscbsc.com/bbs/thread-264251-1-1.html】
HSDPA就是普通的R5/R6版本的数据业务。用单载波的HS-DSCH信道承载数据业务。
DC-HSDPA就是用2个载波的HS-DSCH信道承载数据，要求是这两个载波的带宽间隔是相邻的，也就是5Mhz，配置主辅载波，一般低载频的配为住载频，高载频的配为辅载频。福载波只有业务信道没有公共信道。一般速率能提高1倍，最高能达到43Mbps。
DC-HSDPA就是用2个载波的HS-DSCH信道承载数据，要求是这两个载波的带宽间隔是相邻的，也就是5Mhz，配置主辅载波，一般低载频的配为住载频，高载频的配为辅载频。福载波只有业务信道没有公共信道。一般速率能提高1倍，最高能达到43Mbps。
回答者：Richer 回答时间：2012-08-28 00:51
目前有哪些设备厂家支持该技术？
那些踩的人，好歹说出你踩的理由啊，除了最高速率有点出入以外我觉得没什么问题，应该是42Mbps
