a*****s
发帖数: 6260 | 1 我得意思就是建立一个dummy得注册机制, 手机以为自己在跟基站联系, 其实
只是跟这个femto cell. 别人以为打的是个普通IP电话, 其实femto把电话转
到手机上了. |
|
a*****s
发帖数: 6260 | 2 看来是木人理会, 我自己介绍一下.
femto phone就是自己家里放的迷你手机基站. 一头接DSL/CABLE连到电话公司,
另外一头是无线. 对手机来说根本没区别, 只是在家可以保证信号而已.
我觉得这个东西如果被破了一定很厉害, 想象一下把它装上IP电话的功能, 在
家就自动切换成IP电话, 在家打多少分钟也无所谓. |
|
p******h
发帖数: 1783 | 3 费劲把femto cell破了 不如直接用个支持wifi的手机，直接用voip |
|
g*****e
发帖数: 87 | 4 Femto Cell is for indoor coverage and capacity increase. It doesn't support
mobility management and it is basically an access point solution from telcos
with the air interface is standardized. |
|
p****n
发帖数: 69 | 5 femto很难说会不会大规模流行，先不说技术上面的问题，比如如果你在家用femto，那
么一般要求有cable or DSL的 internet access，但是一旦有了这些，你也许就用wifi
了，我觉得非技术层面的最大问题是：femto cell希望把celluar network嫁接在
internet access network上面，但是一般来说这2种network的carrier存在利益冲突。
（北美貌似就只有verizon 2种service都提供吧）
另外一个femto cell技术层面最大的问题就是： how to manage intra-cell
interference。 |
|
g*****e
发帖数: 87 | 6 Just name one! Please.
I see Starent promoted Femto solution and guess Cisco has Starent Femto
solution now. How come Cisco still goes all the way to England to OEM iP.
access Femto solution? I don't event want to comment the performance in the
real network.
How come Cisco has to reply on Siemens to sell its GGSN? Because Cisco doesn
't have the expertise to support it in telecom network.
Ericsson has around 40% of the total SGSN market around the world several
years ago. Huawei is quickly catch |
|
p****n
发帖数: 69 | 7 为什么femto不和笔记本，电脑抢资源？femto是通过DSL或者cable介入Internet的，如
果femto用无线介入basestation，那么这点和用手机直接介入basestation就没有本质
区别了。 |
|
c**i
发帖数: 6973 | 8 (1) Transistors | Plugging the Leaks; As physical limits bite, electronic
engineers must build ever cleverer transistors. Economist, Aug 20, 2011.
http://www.economist.com/node/21526322
Note:
(a) Jack Kilby
http://en.wikipedia.org/wiki/Jack_Kilby
(1923-2005; American; Nobel Prize laureate in physics in 2000 for his part
in the invention of the integrated circuit [also known as microchip] in 1958
while working at Texas Instruments)
(b) "Off the cuff 'extemporaneously' is 1938 Amer.Eng. colloquial... 阅读全帖 |
|
s******y
发帖数: 28562 | 9 Supersignal ELISA Femto
or Supersignal West FEMTO
both from Pierce Chemical (now under Fisher) |
|
b*******H
发帖数: 830 | 10 THERMO 的Femto 可比普通的ECL灵敏1000倍，平常曝白片的膜换上FEMTO经常是肉眼下
熠熠发光啊，但对有些抗体不行，背景太高。
另外就是世纪太贵。
from
beads
吗？ |
|
A******y
发帖数: 2041 | 11 Almost all the modern western blot imaging system is better than films (
assuming you are using femto level substrate), I like the top of the line
alpha-innotech imager (do not get the red or blue one they try to sell; they
are horrible in my opinion). Bio-rad imager is very common but I think
their tech is the oldest. GE one is very nice. Do not get Kodak one if it
is still on the market (horrible).
Bio-rad recently join the ECL reagent market, their femto-ECL (Clarity) is a
lot cheaper than... 阅读全帖 |
|
A******y
发帖数: 2041 | 12 Almost all the modern western blot imaging system is better than films (
assuming you are using femto level substrate), I like the top of the line
alpha-innotech imager (do not get the red or blue one they try to sell; they
are horrible in my opinion). Bio-rad imager is very common but I think
their tech is the oldest. GE one is very nice. Do not get Kodak one if it
is still on the market (horrible).
Bio-rad recently join the ECL reagent market, their femto-ECL (Clarity) is a
lot cheaper than... 阅读全帖 |
|
g****g
发帖数: 8 | 13 Position for
Ph.D graduate student for
• Optical super resolution nanoscopy,
• Micro/nanofluidics,
• Bioimaging
Highly motivated applicants with strong experimental background in optics
and bioimagings or micro/nanofluidics are invited to apply for Ph.D student
position for experimental research in Biomedical Engineering. We have
developed a large multifunctional far-field optical nanoscopic system using
two tunable femto lasers for the super resolution imaging,
nanop... 阅读全帖 |
|
g****g
发帖数: 8 | 14 Position for
Ph.D graduate student for
• Optical super resolution nanoscopy,
• Micro/nanofluidics,
• Bioimaging
Highly motivated applicants with strong experimental background in optics
and bioimagings or micro/nanofluidics are invited to apply for Ph.D student
position for experimental research in Biomedical Engineering. We have
developed a large multifunctional far-field optical nanoscopic system using
two tunable femto lasers for the super resolution imaging,
nanop... 阅读全帖 |
|
A**T
发帖数: 362 | 15 还有Airvana,做femto好像做的不错。如果femto的市场象预计这么大的话，应该还是有
前途的。 |
|
p****n
发帖数: 69 | 16 I think intra-cell interference would be a much bigger problem for femto
cell than inter-cell interference. The reason is usually adjacent cells use
different frequency. But for users in the same cell, they may use the same
range of frequency. Usually if both users connect to the same base station,
a central controller can manage the intra-cell interference by assigning
different OFDM sub-band or using orthogonal codes in a CDMA fashion, etc.
Now femto and base station probably would act indepen |
|
g****g
发帖数: 8 | 17 Positions for
Ph.D graduate students on
Optical nanoscopy for micro/nanofluidics, cellular imaging and
nanofabrication
Highly motivated applicants with strong experimental background in optics
are invited to apply for two Ph.D graduate student positions for
experimental research. We are developing a novel multifunctional far-field
optical nanoscopic system using two tunable femto lasers for the high
resolution measurement of flow velocity (for research of slip flow and micro
electrokinetic t... 阅读全帖 |
|
发帖数: 1 | 18 Highly motivated applicants with strong experimental background in optics
and bioimagings or micro/nanofluidics are invited to apply for Ph.D student
position for experimental research in Biomedical Engineering. We have
developed a large multifunctional far-field optical nanoscopic system using
two tunable femto lasers for the super resolution imaging,
nanophotolithography and measurement. The system will be explored in
multidisciplinary research in biochip and Lab-on-a-Chip devices, cellular
bi... 阅读全帖 |
|
g****g
发帖数: 8 | 19 Position for
Ph.D graduate student for
• Optical super resolution nanoscopy,
• Micro/nanofluidics,
• Bioimaging
Highly motivated applicants with strong experimental background in optics
and bioimagings or micro/nanofluidics are invited to apply for Ph.D student
position for experimental research in Biomedical Engineering. We have
developed a large multifunctional far-field optical nanoscopic system using
two tunable femto lasers for the super resolution imaging,
nanop... 阅读全帖 |
|
g****g
发帖数: 8 | 20 Positions for
Ph.D graduate students on
Optical nanoscopy for micro/nanofluidics, cellular imaging and
nanofabrication
Highly motivated applicants with strong experimental background in optics
are invited to apply for two Ph.D graduate student positions for
experimental research. We are developing a novel multifunctional far-field
optical nanoscopic system using two tunable femto lasers for the high
resolution measurement of flow velocity (for research of slip flow and micro
electrokinetic t... 阅读全帖 |
|
g****g
发帖数: 8 | 21 Position for
Ph.D graduate student for
• Optical super resolution nanoscopy,
• Micro/nanofluidics,
• Bioimaging
Highly motivated applicants with strong experimental background in optics
and bioimagings or micro/nanofluidics are invited to apply for Ph.D student
position for experimental research in Biomedical Engineering. We have
developed a large multifunctional far-field optical nanoscopic system using
two tunable femto lasers for the super resolution imaging,
nanop... 阅读全帖 |
|
g****g
发帖数: 8 | 22 Positions for
Ph.D graduate students on
Optical nanoscopy for micro/nanofluidics, cellular imaging and
nanofabrication
Highly motivated applicants with strong experimental background in optics
are invited to apply for two Ph.D graduate student positions for
experimental research. We are developing a novel multifunctional far-field
optical nanoscopic system using two tunable femto lasers for the high
resolution measurement of flow velocity (for research of slip flow and micro
electrokinetic t... 阅读全帖 |
|
g****g
发帖数: 8 | 23 Position for
Ph.D graduate student for
• Optical super resolution nanoscopy,
• Micro/nanofluidics,
• Bioimaging
Highly motivated applicants with strong experimental background in optics
and bioimagings or micro/nanofluidics are invited to apply for Ph.D student
position for experimental research in Biomedical Engineering. We have
developed a large multifunctional far-field optical nanoscopic system using
two tunable femto lasers for the super resolution imaging,
nanop... 阅读全帖 |
|
t*****9
发帖数: 10416 | 24 4G LTE Femto / Pico Cell ~~~~~~~~~~~~~~~lol |
|
b*****d
发帖数: 61690 | 25 石墨烯电池示意图
随着中国国家主席习近平抵达英国开启为期4天的国事访问，华为也将和英国曼彻
斯特大学国家石墨烯研究所签署石墨烯研究项目。虽然英国科学家最早成功制备石墨烯
，曼切斯特大学可说是石墨烯的故乡，但中国石墨烯制造已处于世界领先地位，那为何
华为还要去和英国人合作呢？
这要从华为在英国已经取得的成功说起。
华为在英国
自2001年华为在英国设立了第一个办事机构以来，华为就与英国公司和研究机构开
展了广泛的合作：与沃达丰集团成为合作伙伴，并于唐宁街10号签署战略合作伙伴关系
的协议；与英国移动通信运营商EE成为战略合作伙伴；与英国情报机关“政府通信总部
”合作，在牛津郡设立了网络安全设施，确保华为在英国出售的电子设备安全可靠；与
英国萨里大学达成第五代移动通信系统技术科研合作，在萨里大学创建5G创新中心。
在投资方面华为也堪称大手笔——华为在雷丁绿园橡树南路300号设立英国分公司
总部，在布里斯托尔开设新的科研中心，先后收购了集成光子中心、Neil等科技公司，
并加大对这些公司的资金输入力度，扩大公司的规模，进而使华为在英国的科研投入从
2012年的3060万英镑扩大至2014年的... 阅读全帖 |
|
发帖数: 1 | 26 无线通信产业已经发展了四代，目前正处于5G产业化前夕，是当下到一个最热的话题，
5G如何发展，前景如何，是各个方面包括学术界、产业界、投资界以及政府都非常关心
的。另外，中国已经启动6G研究的消息也见诸报端，未来无线通信产业如何发展，是不
是会继续有6、7、8、9G，也引起了大家的关切。为了回答这些问题，我们首先简单地
回顾一下无线通信产业发展的历史。
无线通信产业是由需求和技术两个轮子驱动前进的。早在1947年，贝尔实验室的科学家
就提出了蜂窝通信的概念，其中的核心技术是频率复用和切换。基于这一概念，贝尔实
验室于1978年研制出先进移动电话系统（Advanced Mobile Phone Service，AMPS），
这就是第一代移动通信系统。AMPS是一个模拟通信系统，采用频分多址（FDMA）的复用
技术，主要技术手段是滤波器，容易受噪声的干扰，语音质量较差。
随着集成电路技术的发展，第二代移动通信系统采用了数字技术，并采用TDMA和信道编
码技术，使得通信系统向宽带化发展，语音质量得到了较大的改善。 其中欧洲制定的
GSM系统非常成功，至今仍在广泛使用。
20世纪9... 阅读全帖 |
|
M******8
发帖数: 10589 | 27 https://www.iyiou.com/p/93766.html
产业综合
塬上草
杨学志
[ 亿欧导读 ] 5G是无线通信的下一代技术，也是当前最热的话题。不过，对于5G的价
值也有一些质疑之声。
【编者按】5G是无线通信的下一代技术，也是当前最热的话题。不过，对于5G的价值也
有一些质疑之声。近日，《通信之道》作者、技术大牛杨学志在通信人家园发文，从技
术角度论证5G是“失败的技术”。内容比较新颖，还请读者自行评判。
文章来源塬上草，作者，杨学志，经亿欧编辑发布，供业内人士参考。
各工作岗位将被AI取代的概率
无线通信产业已经发展了四代，目前正处于5G产业化前夕，是当下到一个最热的话题，
5G如何发展，前景如何，是各个方面包括学术界、产业界、投资界以及政府都非常关心
的。另外，中国已经启动6G研究的消息也见诸报端，未来无线通信产业如何发展，是不
是会继续有6、7、8、9G，也引起了大家的关切。为了回答这些问题，我们首先简单地
回顾一下无线通信产业发展的历史。
无线通信产业是由需求和技术两个轮子驱动前进的。早在1947年，贝尔实验室的科学家
就提出了蜂窝通信的概念，其中的核心技... 阅读全帖 |
|
l******4
发帖数: 207 | 28 please contact l******[email protected]
The JD as follows:
Responsiblity:
1. Attend telecomm.indury(Femto Forum) meeting;
2. HomeNB related reserach;
Requirement:
1. Active, good at communication with others;
2. Excellent Oral,writting English;
3. Telecomm. Computer, Electronic related edulation background.
Candicates please contact l******[email protected] |
|
l******4
发帖数: 207 | 29 please contact l******[email protected]
The JD as follows:
Responsiblity:
1. Attend telecomm.indury(Femto Forum) meeting;
2. HomeNB related reserach;
Requirement:
1. Active, good at communication with others;
2. Excellent Oral,writting English;
3. Telecomm. Computer, Electronic related edulation background.
Candicates please contact l******[email protected] |
|
w*****n
发帖数: 61 | 30 Positions for Ph.D graduate student and postdoctoral fellow on
Optical nanoscopy for micro/nanofluidics, cellular imaging and
nanofabrication
Highly motivated applicants with strong background in optics are invited to
apply for a Ph.D graduate student position for experimental research. We are
the only lab in micro/nanofluidics and fluid dynamics community in the
world, that are developing a novel multifunctional far-field optical
nanoscopic system using two tunable femto lasers for the high res... 阅读全帖 |
|
i*******d
发帖数: 1430 | 31 call them and get a femto-cell. |
|
g********3
发帖数: 1281 | 32 what is femto-cell? I don't get any signal in my office building either. |
|
m***y
发帖数: 14763 | 33 To be specific, 实验室手机没信号 :)
But don't worry, Femto is coming. LZ will have a cell wherever he'd like. |
|
y******n
发帖数: 1077 | 34 Keywords: Femto-Cloud; Green Mobile Network
PM me |
|
s*6
发帖数: 3972 | 35 国内96年能做的医院还不多，你挺时髦啊。那时候应该还是prk多，现在都是lasik或者
ek，femto laser。
but |
|
a***a
发帖数: 8941 | 36 从nano变成pico了
下面可以搞femto了 |
|
|
l*****o
发帖数: 19653 | 38 没那么严重，femto laser可以很大瞬时功率。。。。 |
|
b*s
发帖数: 82482 | 39 他说了脉冲了么？
没那么严重，femto laser可以很大瞬时功率。。。。 |
|
b*s
发帖数: 82482 | 40 他说了激光了么？
没那么严重，femto laser可以很大瞬时功率。。。。 |
|
b*s
发帖数: 82482 | 41 pico笑？
下面就是femto笑了……
微微笑 |
|
h******g
发帖数: 11250 | 42 nano不好意思混了
pico
femto
atto |
|
|
f****i
发帖数: 20252 | 44 ATT有个服务femto cell的服务叫 micro cell：www.att.com/standalone/3gmicrocell/ |
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J**********y
发帖数: 95 | 45 蜂窝移动通信系统是从话音业务开始的，拥有专门的核心网解决切换漫游等移动性
管理和认证计费等用户管理。到第二代移动通信系统GSM实现了数字化，仍然是以话音
为主，开始有短信和GPRS等低速数据业务。本世纪初面市的第三代蜂窝移动通信早期仍
然是基于ATM的面向连接的系统（B-ISDN）, 随后面对接入互联网的强大需求继固网之
后蜂窝移动通信也开始了IP化的进程。一方面是发展HSPA实现空口IP化，另外一方面是
核心网的IP化和扁平化。4G延续了这一进程。扁平化的蜂窝移动通信网络成为一个扁平
的IP专网，通过网关连接公共互联网。移动性管理和用户管理全部在蜂窝移动网上完成
，公共互联网仍然保持固定互联网的原有形态，用户使用移动运营商提供的临时IP地址
，不需要移动性管理。通过网关隔离，蜂窝移动通信网络和公共互联网可以各自独立发
展。面对移动宽带业务的快速，蜂窝移动通信开始大规模部署4G , 进一步研发5G移动
通信系统。与此同时，公共互联网也在不断演进，如发展CDN以重叠网的方式应对内容
分发的需求。目前正在从连接业务为主，向以内容/信息为主的未来互联网演进。
通过网关隔离，蜂窝移动通信... 阅读全帖 |
|
|
z**r
发帖数: 17771 | 47 这么一说好像听说过。不过市场应该不会很大吧？感觉像是面向广大rural用户的。破
解估计没那么简单，手机要想打电话，不是光有信号就可以的，还要注册什么的。破解
成普通IP电话后，没地方注册了 |
|
a*****s
发帖数: 6260 | 48 还要切换到wifi啊, 比较麻烦. 这个东西什么手机都直接用了. |
|
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d****i
发帖数: 1038 | 50 this reminds me of Xiao Ling Tong in China... hehe |
|
