問(wèn)題已開啟
(普通問(wèn)題)
• HS-PDSCH配置15條碼道,HS-SCCH配置1條碼道,那么在這種情況下夠接入()個(gè)HSDPA用戶 2017-04-17
• HSDPA的SF 2017-04-12
• 華為WCDMA同站下小區(qū)HSDPA速率不一致 2016-05-26
• 華為WCDMA中同一個(gè)基站下的小區(qū)HSDPA速率不一樣 2016-05-26
• WCDMA DC-HSDPA開局指導(dǎo)書。 2015-08-22
• WCDMAHSDPA提速方案 2015-05-07
• 在LTE中,CQI是4bit,而在HSDPA情況下,CQI是5bit,為什么呢 2015-04-01
• 在LTE中,CQI是4bit,而在HSDPA情況下,CQI是5bit 2015-04-01
• HSDPA的SF 2017-04-12
• 華為WCDMA同站下小區(qū)HSDPA速率不一致 2016-05-26
• 華為WCDMA中同一個(gè)基站下的小區(qū)HSDPA速率不一樣 2016-05-26
• WCDMA DC-HSDPA開局指導(dǎo)書。 2015-08-22
• WCDMAHSDPA提速方案 2015-05-07
• 在LTE中,CQI是4bit,而在HSDPA情況下,CQI是5bit,為什么呢 2015-04-01
• 在LTE中,CQI是4bit,而在HSDPA情況下,CQI是5bit 2015-04-01
問(wèn)題答案
( 6 )
回答者:
qwerrazxs
回答時(shí)間:2012-08-28 00:19


1、
HSDPA(High Speed Downlink Packet Access)高速下行分組接入,是一種移動(dòng)通信協(xié)議,亦稱為3.5G(3½G)。該協(xié)議在WCDMA下行鏈路中提供分組數(shù)據(jù)業(yè)務(wù),在一個(gè)5MHz載波上的傳輸速率可達(dá)8-10 Mbit/s(如采用MIMO技術(shù),則可達(dá)20 Mbit/s)。在具體實(shí)現(xiàn)中,采用了自適應(yīng)調(diào)制和編碼(AMC)、多輸入多輸出(MIMO)、混合自動(dòng)重傳請(qǐng)求(HARQ)、快速調(diào)度、快速小區(qū)選擇等技術(shù)。
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- )HSDPA is the natural evolution of HSPA by means of carrier aggregation in the downlink[1]. UMTS licenses are often issued as 10 or 15 MHz paired spectrum allocations. The basic idea of the multicarrier feature is to achieve better resource utilization and spectrum efficiency by means of joint resource allocation and load balancing across the downlink carriers.
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.
【中文介紹http://gg1fic3.cn/bbs/thread-264251-1-1.html】
HSDPA(High Speed Downlink Packet Access)高速下行分組接入,是一種移動(dòng)通信協(xié)議,亦稱為3.5G(3½G)。該協(xié)議在WCDMA下行鏈路中提供分組數(shù)據(jù)業(yè)務(wù),在一個(gè)5MHz載波上的傳輸速率可達(dá)8-10 Mbit/s(如采用MIMO技術(shù),則可達(dá)20 Mbit/s)。在具體實(shí)現(xiàn)中,采用了自適應(yīng)調(diào)制和編碼(AMC)、多輸入多輸出(MIMO)、混合自動(dòng)重傳請(qǐng)求(HARQ)、快速調(diào)度、快速小區(qū)選擇等技術(shù)。
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.
【中文介紹http://gg1fic3.cn/bbs/thread-264251-1-1.html】

HSDPA就是普通的R5/R6版本的數(shù)據(jù)業(yè)務(wù)。用單載波的HS-DSCH信道承載數(shù)據(jù)業(yè)務(wù)。
DC-HSDPA就是用2個(gè)載波的HS-DSCH信道承載數(shù)據(jù),要求是這兩個(gè)載波的帶寬間隔是相鄰的,也就是5Mhz,配置主輔載波,一般低載頻的配為住載頻,高載頻的配為輔載頻。福載波只有業(yè)務(wù)信道沒有公共信道。一般速率能提高1倍,最高能達(dá)到43Mbps。
DC-HSDPA就是用2個(gè)載波的HS-DSCH信道承載數(shù)據(jù),要求是這兩個(gè)載波的帶寬間隔是相鄰的,也就是5Mhz,配置主輔載波,一般低載頻的配為住載頻,高載頻的配為輔載頻。福載波只有業(yè)務(wù)信道沒有公共信道。一般速率能提高1倍,最高能達(dá)到43Mbps。
回答者:
Richer
回答時(shí)間:2012-08-28 00:51


目前有哪些設(shè)備廠家支持該技術(shù)?

那些踩的人,好歹說(shuō)出你踩的理由啊,除了最高速率有點(diǎn)出入以外我覺得沒什么問(wèn)題,應(yīng)該是42Mbps
pleasesister 2014-01-08 14:34
學(xué)習(xí)了 牛逼的功能
回答者:
darius
回答時(shí)間:2012-08-28 08:21


又長(zhǎng)知識(shí)了!。。。。。。。!
回答者:
shengmingguoke
回答時(shí)間:2012-08-28 08:26


又學(xué)習(xí)了。。
回答者:
yanghuiyou
回答時(shí)間:2012-08-28 08:37


就是一個(gè)stangbyread?
回答者:
夜々風(fēng)殤
回答時(shí)間:2012-08-30 13:25


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