f****g 发帖数: 44 | 1 【 以下文字转载自 Linux 讨论区,原文如下 】
发信人: fakong (fakong), 信区: Linux
标 题: Help, What is .umt file?
发信站: Unknown Space - 未名空间 (Sat Apr 2 15:32:14 2005) WWW-POST
How to deal with it?
Thanks |
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N****o 发帖数: 232 | 2 是Timing Advance. TA 吧。GSM 的描述见下,
http://www.gsmfordummies.com/timing/timing.shtml
也可以看看3GPP TS 45.010
如果是UMTS,RACH 信道采用CDMA 码相关计算方式确定延迟时间,BS再确定TA量。 原
理和GSM是一样的。
Timing Advance
信号在空间传输是有延迟的,如移动台在呼叫期间向远离基站的方向移动,则从基
站发出的信号将“越来越迟”的到达移动台,与此同时,移动台的信号也会“越来越迟
”的到达基站,延迟过长会导致基站收到的某移动台在本时隙上的信号与基站收下一个
其它移动台信号的时隙相互重叠,引起码间干扰,因此,在呼叫进行期间,移动台发给
基站的测量报告头上携带有移动台测量的时延值,而基站必须监视呼叫到达的时间,并
在下行信道上以480ms一次的频率向移动台发送指令,指示移动台提前发送的时间,这
个时间就是TA(时间提前量),TA的值域是0~63(0~233μs),它被GSM定时提前的编
码0~63bit所限,使一般GSM基站的覆盖距离为35km,计算如下:
1/2*3.7... 阅读全帖 |
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发帖数: 1 | 4 奥巴马的国防部负责的学校貌似和中国军队有瓜葛
Fox News investigation: DoD-funded school at center of federal probes over
suspected Chinese military ties
Catherine Herridge By Catherine Herridge, Pamela K. Browne, Cyd Upson
Published February 24, 2017 FoxNews.com
Facebook Twitter livefyre Email Print
Undated photo: UMT academic dean J. Davidson Frame, right, salutes his wife,
left, UMT president Yanping Chen Frame.
Undated photo: UMT academic dean J. Davidson Frame, right, salutes his wife,
left, UMT president Yan... 阅读全帖 |
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c*********i 发帖数: 2749 | 5 【 以下文字转载自 Prepaid 俱乐部 】
发信人: chenhongzhi (达), 信区: Prepaid
标 题: [大更新]XT1526 Moto E神机指北,R+与自由泡自由切换
发信站: BBS 未名空间站 (Wed Apr 13 22:48:57 2016, 美东)
备用机首选!Moto E神机和自由泡国际GSM 流量卡让你免费畅游att tmobile Sprint三
大网络,CDMA GSM WCDMA LTE 统统拿下。
[更新]XT1526 Moto E神机指北:R+和FP兼得
说明:由于Sprint网络严格执行了S网不同MVNO品牌prepaid手机不能串户注册,2016/4
/16之后,购买的未曾激活的Sprint/Boost/Virgin的 Moto E已经不能注册到R+。
Workaround: 可以考虑购买FP自由泡的30刀的翻新Moto E,机型应该也是XT1526,自
带2GB免费终生套餐,也可以用FP GSM SIM卡。
--------------------------------------
----------------------... 阅读全帖 |
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c****r 发帖数: 420 | 6 今天翻东西翻到这篇指北的帖子,觉得有收藏价值,转过来了。
【 以下文字转载自 PDA 讨论区 】
发信人: chenhongzhi (达), 信区: PDA
标 题: [更新]XT1526 Moto E神机指北
发信站: BBS 未名空间站 (Wed Apr 13 22:57:53 2016, 美东)
[更新]XT1526 Moto E神机指北:R+和FP兼得
说明:由于Sprint网络严格执行了S网不同MVNO品牌prepaid手机不能串户注册,2016/4
/16之后,购买的未曾激活的Sprint/Boost/Virgin的 Moto E已经不能注册到R+。
Workaround: 可以考虑购买FP自由泡的30刀的翻新Moto E,机型应该也是XT1526,自
带2GB免费终生套餐,也可以用FP GSM SIM卡。
--------------------------------------
--------------------------
以下讨论,适用于 XT1526 Moto E 第二代 LTE版本 安卓5.1 系统版本号25.11.25,
Sprint 和Boost版... 阅读全帖 |
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j******u 发帖数: 41683 | 7 ☆─────────────────────────────────────☆
cdlqin (cdlqin) 于 (Thu Jan 16 09:54:23 2014, 美东) 提到:
很多mm都不停的问能不能拿rebate
反复说了哈,别老问了,如果不用它家的服务就洗洗睡了啊,别纠结了!我推荐的都是
20刀rebate的手机(不推荐nokia521,解不了啊!),所以价格应该都能接收,不能接
收rebate价格前的价格就别下单了啊。
今天看到已经上SD了就怕秒gone啊,等几天怕来不及了,所以赶紧的把deal贡献出来,
话说我的手机还没有到,晕死,不过有一款我有,虽然不是它家是tmobile的,但是
unlock了所以还是有一点发言权的
sd link:
http://slickdeals.net/f/6632386-alcatel-one-touch-evolve-29-00-
Alcatel One Touch Evolve $29.00 FS; Alcatel One Touch Fierce $49 FS; LG
Optimus F6 $99 FS; Hauwei ... 阅读全帖 |
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k*****k 发帖数: 500 | 8 关于新的ipad
可不可以买vz的型号,然后再换成 ATT的plan,从规格上看, 应该是可以的,但不知
道会不会有什么问题,会不会VZ的型号把umts的功能给锁死了?
Wi-Fi + 4G for AT&T model: LTE (700, 2100 MHz)3; UMTS/HSPA/HSPA+/DC-HSDPA (
850, 900, 1900, 2100 MHz); GSM/EDGE (850, 900, 1800, 1900 MHz)
Wi-Fi + 4G for Verizon model: LTE (700 MHz)3; CDMA EV-DO Rev. A (800, 1900
MHz); UMTS/HSPA/HSPA+/DC-HSDPA (850, 900, 1900, 2100 MHz); GSM/EDGE (850,
900, 1800, 1900 MHz)
---------------------------------
做个对比,ipad2 的规格是
Wi-Fi + 3G model: UMTS/HSDPA/HSUPA (850, 900, 1900, 2100... 阅读全帖 |
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c****s 发帖数: 66 | 9 有兴趣的站内联系
Title: Engineer
Location: San Ramon, CA
Duration: 12 Months
Project Name:
UMTS/LTE Data Mediation
Project Description:
· This project is developing UMTS and LTE data mediation platforms
that will provide data to drive multiple downstream applications.
· The supported application areas include performance monitoring,
troubleshooting, self organizing network (SON), RAN optimization, and
location-based services.
Job Description:
· Assist with the development of UMTS... 阅读全帖 |
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c****n 发帖数: 15245 | 10 赶紧上各个手机的参数
Alcatel One Touch Evolve:
3G
Android 4.1
4.0 inches 480 x 800 pixels (233 ppi) TFT
Single Core ARM Cortex A-9
4GB RAM
GSM 850, 900, 1800, 1900 MHz
UMTS 850, 1700/2100, 1900, 2100 MHz
HSDPA 7.2 Mbit/s, HSUPA 5.76 Mbit/s, EDGE, GPRS
GPS, A-GPS
Turn-by-turn navigation
Alcatel One Touch Fierce:
4G
Andriod 4.2.2
4.5 inch screen, 540 x 960 pixels (245 ppi) LCD
Quad core, 1200 MHz, ARM Cortex-A7
4GB RAM
GSM: 850, 900, 1800, 1900 MHz
UMTS: 850, 1700/2100, 1900 MHz
HSDPA+ (4G) 21.1 Mbit/s, HSU... 阅读全帖 |
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c****n 发帖数: 15245 | 11 赶紧上各个手机的参数
Alcatel One Touch Evolve:
3G
Android 4.1
4.0 inches 480 x 800 pixels (233 ppi) TFT
Single Core ARM Cortex A-9
4GB RAM
GSM 850, 900, 1800, 1900 MHz
UMTS 850, 1700/2100, 1900, 2100 MHz
HSDPA 7.2 Mbit/s, HSUPA 5.76 Mbit/s, EDGE, GPRS
GPS, A-GPS
Turn-by-turn navigation
Alcatel One Touch Fierce:
4G
Andriod 4.2.2
4.5 inch screen, 540 x 960 pixels (245 ppi) LCD
Quad core, 1200 MHz, ARM Cortex-A7
4GB RAM
GSM: 850, 900, 1800, 1900 MHz
UMTS: 850, 1700/2100, 1900 MHz
HSDPA+ (4G) 21.1 Mbit/s, HSU... 阅读全帖 |
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f*******9 发帖数: 95 | 12 华盛顿有UMT(University of Management and Technology)这个大学吗?同学收到这
个学校的录取通知,有点担心是不是骗子,问我我也不是很清楚,知道的朋友告诉我一
声吧,多谢了!
以下是同学收到的该大学的中文介绍的一部分:
“美国管理技术大学(University of Management and Technology, 简称UMT,www.
umtweb.edu) 位于美国首都华盛顿地区,坐落在繁华的罗斯林商业区,畔临着美丽阔静
的波多马克河,与古老悠久的乔治城隔河相望。UMT是一所现代城市型大学,在世界顶
级项目管理专家J.D.弗雷姆博士学术校长带领下,以现代项目管理的世界领先学府著称
。该大学设有各类准学士,学士,硕士和博士学位教育。同时,还开设各类专业证书教
育培训项目,是美国联邦政府和军方及各著名大企业培养项目管理和采购管理的著名学
府。到目前为止,UMT教育培养学生已达35000多人,许多毕业生已成为美国政府军界商
界的要人和主力军。
美国管理技术大学是美国弗吉尼亚州高等教育委员会(SCHEV,www.schev.edu)正式授权
进行高 |
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j******3 发帖数: 18319 | 13 根据苹果的描述:
http://www.apple.com/iphone/specs.html
GSM model A1428 supports:
UMTS/HSPA+/DC-HSDPA(850,900,1900,2100 MHz)
GSM/EDGE (850,900,1800,1900 MHz)
LTE (Bands 4 and 17)
GSM model A1429 supports:
UMTS/HSPA+/DC-HSDPA(850,900,1900,2100 MHz)
GSM/EDGE (850,900,1800,1900 MHz)
LTE (Bands 1,3,5)
CDMA model A1429 supports:
UMTS/HSPA+/DC-HSDPA(850,900,1900,2100 MHz)
GSM/EDGE (850,900,1800,1900 MHz)
LTE (Bands 1,3,5,13,25)
CDMA EV-DO Rev.A and Rev.B (800,1900,2100 MHz)
看得出来,这3个model都支持UMTS/HSPA+/DC-HSDPA... 阅读全帖 |
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j*******o 发帖数: 178 | 14 目前,有3种型号:
Model A1428 (GSM model)
Model A1429 (CDMA model)
Model A1429 (GSM model)
——————————————————————————————
更新:
Model A1428
这一版iPhone 5是美国和加拿大会用到的GSM版本。所支持的网络制式包括:GSM(850/
900/1800/1900Mhz)、UMTS(850/900/1900/2100Mhz)、HSPA+。另外,苹果表示
iPhone 5支持LTE频段band class 17(lower 700Mhz without A block),band class
4(AWS-1,1.7Ghz/2.1Ghz)。美国通信委员会表示,iPhone 5也支持LTE band class
2(PCS,1.9Ghz)以及LTE band class 5(Cellular 850,850Mhz)。所以A1428版的
iPhone 5支持四个频段的LTE。
这串乱七八糟的数据意味着这个版本的iPhone 5不支持美国运营商T-Mobile的AWS HSPA
... 阅读全帖 |
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z**r 发帖数: 17771 | 15 【 以下文字转载自 EmergingNetworking 讨论区 】
发信人: zher (民工.铜豌豆), 信区: EmergingNetworking
标 题: Mobile Packet Core position
发信站: BBS 未名空间站 (Tue Mar 20 00:40:01 2012, 美东)
if you are interested, please send your resume over.
Position Name: Packet Core Tester (SGSN,GGSN)
Location: Seattle, WA
Contract lenght: 6 months to 1 year, renewable
SKILL LEVEL:Senior YRS OF EXPER: 5+
DEGREE:Bachelor of Science MAJOR: Computer Science,
Engineering
OVERTIME:No ... 阅读全帖 |
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u*******m 发帖数: 3395 | 16 Hi ,
Greeting from Avion Systems,
We have job openings POSITION TITLE: RF Engineers with our client Alcatel-
Lucent.
If you are interested reply me with the following information with your
updated resume to
mail id – j***********[email protected].
Otherwise I request to refer your friends by forwarding this mail to them.
Details needed:
Kindly Mention the Order #:……. For which job description you are
matching.
Last Position:
Expected Rate:
Duration to Join:
... 阅读全帖 |
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u*******m 发帖数: 3395 | 17 Hi ,
Greeting from Avion Systems,
We have job openings POSITION TITLE: RF Engineers with our client Alcatel-
Lucent.
If you are interested reply me with the following information with your
updated resume to
mail id – j***********[email protected].
Otherwise I request to refer your friends by forwarding this mail to them.
Details needed:
Kindly Mention the Order #:……. For which job description you are
matching.
Last Position:
Expected Rate:
Duration to Join:
... 阅读全帖 |
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z**r 发帖数: 17771 | 18 【 以下文字转载自 EmergingNetworking 讨论区 】
发信人: zher (民工.铜豌豆), 信区: EmergingNetworking
标 题: Mobile Packet Core position
发信站: BBS 未名空间站 (Tue Mar 20 00:40:01 2012, 美东)
if you are interested, please send your resume over.
Position Name: Packet Core Tester (SGSN,GGSN)
Location: Seattle, WA
Contract lenght: 6 months to 1 year, renewable
SKILL LEVEL:Senior YRS OF EXPER: 5+
DEGREE:Bachelor of Science MAJOR: Computer Science,
Engineering
OVERTIME:No ... 阅读全帖 |
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k**0 发帖数: 19737 | 19 The specific frequency bands originally defined by the UMTS standard are 1885–2025 MHz for the mobile-to-base (uplink) and 2110–2200 MHz for the base-to-mobile (downlink). In the US, 1710–1755 MHz and 2110–2155 MHz will be used instead, as the 1900 MHz band was already utilized.[6] While UMTS2100 is the most widely-deployed UMTS band, some countries' UMTS operators use the 850 MHz and/or 1900 MHz bands (independently, meaning uplink and downlink are within the same band), notably in the US by AT |
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d*********g 发帖数: 2906 | 20 我们比的本来就不是GSM和3GSM/UMTS。我们说的是运行在AT&T GSM (2G)/UMTS (3G)下
的iPhone和运行在Verizon
CDMA (2G)/CDMA2000 (3G)下的iPhone的不同通话质量问题。
在3G下,无论UMTS还是CDMA 2000,基本技术都很类似,都是CDMA的。
但这个不是决定手机通话质量的唯一因素,AT&T和Verizon塔台的backhaul的容量在现
在有很大不同,AT&T在现阶段还
落后于Verizon,这个是两个网络质量最大区别之一。 |
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d***a 发帖数: 13752 | 21 我猜测小二说的是对的。这三种不同的型号,可能只是配置上的不同。硬件上大概是同一
种型号,器件通用。4S就是这种情况,AT&T和Verizon的4S硬件上是一样的,但出厂的
时候,AT&T的4S上的CDMA功能被关闭掉了。
如果Apple真做三种不同iphone 5硬件型号,只会增加自己的成本,不合情理。
当然这也只是我的猜测。也许不同型号的LTE天线有一些不同?
GSM model A1428*: UMTS/HSPA+/DC-HSDPA (850, 900, 1900, 2100 MHz);
GSM/EDGE (850, 900, 1800, 1900 MHz); LTE (Bands 4 and 17)
CDMA model A1429*: CDMA EV-DO Rev. A and Rev. B (800, 1900, 2100 MHz);
UMTS/HSPA+/DC-HSDPA (850, 900, 1900, 2100 MHz); GSM/EDGE (850, 900,
1800, 1900 MHz); LTE (Bands 1, 3, 5, 13, 25)... 阅读全帖 |
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w******t 发帖数: 16937 | 22 GSM model A1428*: UMTS/HSPA+/DC-HSDPA (850, 900, 1900, 2100 MHz); GSM/EDGE (
850, 900, 1800, 1900 MHz); LTE (Bands 4 and 17)
CDMA model A1429*: CDMA EV-DO Rev. A and Rev. B (800, 1900, 2100 MHz); UMTS/
HSPA+/DC-HSDPA (850, 900, 1900, 2100 MHz); GSM/EDGE (850, 900, 1800, 1900
MHz); LTE (Bands 1, 3, 5, 13, 25)
GSM model A1429*: UMTS/HSPA+/DC-HSDPA (850, 900, 1900, 2100 MHz); GSM/EDGE (
850, 900, 1800, 1900 MHz); LTE (Bands 1, 3, 5) |
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b***z 发帖数: 2723 | 23 Cellular and Wireless
Model A1549 (GSM)*
Model A1522 (GSM)*
UMTS/HSPA+/DC-HSDPA (850, 900, 1700/2100, 1900, 2100 MHz)
GSM/EDGE (850, 900, 1800, 1900 MHz)
LTE (Bands 1, 2, 3, 4, 5, 7, 8, 13, 17, 18, 19, 20, 25, 26, 28, 29)
.
Model A1549 (CDMA)*
Model A1522 (CDMA)*
CDMA EV-DO Rev. A and Rev. B (800, 1700/2100, 1900, 2100 MHz)
UMTS/HSPA+/DC-HSDPA (850, 900, 1700/2100, 1900, 2100 MHz)
GSM/EDGE (850, 900, 1800, 1900 MHz)
LTE (Bands 1, 2, 3, 4, 5, 7, 8, 13, 17, 18, 19, 20, 25, 26, 28, 29)
.
Model A158... 阅读全帖 |
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s*******e 发帖数: 207 | 24 很多朋友都想在美国买Iphone 6 或者 Iphone6 Plus 然后在国内用。但是不知道哪一
款可以在国内使用。网上也是众说纷纭。有的人说官方解锁版都可以用,有的说不行,
只能用到中国移动等等。经过几天的研究。我们为你找到官方的最终答案。
http://www.apple.com/iphone/LTE/
其实官方网站上写的很清楚。你去搜一下“china”, 你会看到。
国内三家运营商4G网络制式分别如下:
联通4G:TD-LTE、FDD-LTE
电信4G:TD-LTE、FDD-LTE
移动4G:TD-LTE
可以看到。联通跟电信都是采用双4G网络制式。 只有移动只使用了TD-LTE
Sprint的解锁版是可以用到国内的移动,联通,电信。都可以的。
iPhone 6
Model A1586 (GSM)
Model A1586 (CDMA)
iPhone 6 Plus
Model A1524 (GSM)
Model A1524 (CDMA)
[size=1em]这两款包括GSM 和CDMA,以及其他的频段。它包含FEE-LTE 和 TD-LTE,所以
支持国内运行商的4G. 这款是通... 阅读全帖 |
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t********i 发帖数: 7856 | 25 http://www.apple.com/iphone/LTE/
已更新。加入了 6s / 6s+ 的内容。
S,T,V都是A1688/A1687。A是A1633/A1634。中国版有专门的型号:A1700/A1699。
6s/6s+ 的网页上说:
Model A1633/A1634
LTE (Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 27, 28, 29,
30)
TD-LTE (Bands 38, 39, 40, 41)
TD-SCDMA 1900 (F), 2000 (A)
UMTS/HSPA+/DC-HSDPA (850, 900, 1700/2100, 1900, 2100 MHz)
GSM/EDGE (850, 900, 1800, 1900 MHz)
Model A1688/A1687
LTE (Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 27, 28, 29)
TD-LTE (Bands 38, 39, 40, 41)
T... 阅读全帖 |
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t********i 发帖数: 7856 | 26 http://www.apple.com/iphone/LTE/
已更新。加入了 6s / 6s+ 的内容。
S,T,V都是A1688/A1687。A是A1633/A1634。中国版(移动联通电信)是A1700/A1699。
6s/6sp 的网页上说:
http://www.apple.com/iphone-6s/specs/
Model A1633*
Model A1634*
LTE (Bands 1, 2, 3, 4, 5, 7, 8, 12, 13, 17, 18, 19, 20, 25, 26, 27, 28, 29,
30)
TD-LTE (Bands 38, 39, 40, 41)
TD-SCDMA 1900 (F), 2000 (A)
UMTS/HSPA+/DC-HSDPA (850, 900, 1700/2100, 1900, 2100 MHz)
CDMA EV-DO Rev. A (800, 1700/2100, 1900, 2100 MHz)
GSM/EDGE (850, 900, 1800, 1900 MHz)
Model A1688*
Model A1687*
... 阅读全帖 |
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g*******u 发帖数: 3948 | 27 这些信息够吗? thanks
Product Identifiers
Brand Apple
Network Unlocked
Family Line Apple iPhone
Model 5
Type Smartphone
Key Features
Storage Capacity 16GB
Color White & Silver
Network Generation 2G, 3G, 4G
Network Technology GSM / EDGE / CDMA EV-DO Rev. A and Rev. B / UMTS /
HSPA+ / DC-HSDPA / LTE, GSM / EDGE / UMTS / HSPA+ / DC-HSDPA / LTE
Band GSM/EDGE 850/900/1800/1900 UMTS/HSPA+ / DC-HSDPA 850/900/1900/2100
LTE 4/17
Style Bar
Camera Resolution 8.0MP
Connectivity ... 阅读全帖 |
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z**r 发帖数: 17771 | 28 if you are interested, please send your resume over.
Position Name: Packet Core Tester (SGSN,GGSN)
Location: Seattle, WA
Contract lenght: 6 months to 1 year, renewable
SKILL LEVEL:Senior YRS OF EXPER: 5+
DEGREE:Bachelor of Science MAJOR: Computer Science,
Engineering
OVERTIME:No
% TRAVEL:0
WORK STATUS:Authorized to work in US
... 阅读全帖 |
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