下行速率

在此基础上，具体分析了BT算法的下载流程，针对ADSL上下行速率所固有的不匹配问题，提出了一种基于多用户自适应聚合下载的方法。

Then , the article analyse the BT transmission process , aim at the speed of down and up of ADSL is not matching , advance a multiuser self-adapt download mechanism .

xDSL是目前流行的宽带铜线接入技术，其中ADSL具有上行和下行速率不对称的传输特点。

As a copper-based board band access technology , xDSL is prevalent . As a branch of xDSL , ADSL features a different up and down asymmetrical speed .

我发现它的屏幕画面生动悦目，通话清晰稳定，在Verizon和AT&T网络环境下的下行速率为每秒12兆。

I found the screen vivid and pleasing , calls clear and reliable , and downstream data speeds on Verizon and AT & T averaged about 12 megabits per second .

阐述了ADSL的接入方式，传输方式，并且给出了ADSL下行速率与传输距离之间的关系，对ADSL网络常见的故障做了分析

The paper introduces the connecting and transmitting ways of ADSL and the relation between downstream rate and transmitting distance under the condition of ADSL , and makes an analysis of common breakdowns on ADSL network

由于普通用户上网时主要是下载数据，所以ADSL根据这种现实情况提出下行速率大于上行速率的方式来提供用户上网，此即不对称数字用户线的由来。

Because the average users use the net mainly to download data , ADSL proposes the way of making the rate of downstream bigger than the upstream according to the realistic situation . As a result Asymmetric Digital Subscriber Line came out .

非对称业务的上下行速率不同，因而其上下行负载也不同。

The uplink and downlink loads are different because the rates of uplink and downlink asymmetric services are different .

本文改进的调度算法对于像网页浏览，电子邮件收发、上传数据和视频点播这样的对上、下行速率要求很高的实时业务在时延上有很大改善。

The improved algorithm to make better for high rate of business in delay web browsing , sending E-mail and video on demand .

HSDPA是WCDMA的数据增强型技术，可极大提升网络的下行数据速率及系统容量。

HSDPA is an enhanced data technology in WCDMA application and can upgrade the downlink data speed and system capacity of the wireless network .

和「对称数位用户回路」（SDSL）的资料流是对称的，也就是说上行和下行的速率相同。

In HDSL ( High bit-rate DSL ) and SDSL ( Symmetric DSL ) the data stream is symmetric ; that is , the upstream and downstream rates are the same .

3GPP长期演进（LTE）作为第三代无线通信系统的演进，相比于3G系统LTE支持的系统带宽更大、带宽配置更灵活、上下行峰值速率更高、网络结构更扁平、接入时延更小。

As the evolution of the third generation wireless communication system , 3GPP Long Term Evolution ( LTE ) supports a greater system bandwidth , more flexible bandwidth configuration , higher peak data rate of the uplink and downlink , more flat the network structure and less access delay .

基于效用函数的CDMA系统下行联合功率速率分配

Joint Power and Data Rate Allocation for the Downlink in CDMA Systems Based on Utility Function

研究了码分多址（CDMA）系统中下行联合功率速率分配问题。

The joint power and data rate allocation in code division multiple access ( CDMA ) systems was studied .

高速下行分组接入（HSDPA）作为WCDMA的增强技术，大大提高了下行数据速率。

As an enhanced technology of WCDMA , HSDPA has greatly increased the transmission rate of downstream data .

作为主要的第三代移动通信系统标准之一的WCDMA标准，在Release5中采用了高速下行分组接入技术（HSDPA），可以提供高达10Mb／s的下行分组传输速率。

WCDMA is one of the 3rd mobile telecommunication systems criteria . It adopts High Speed Downlink Packet Access ( HSDPA ) in Release 5 which can transmit downlink packets at the rate of 10Mb / s.