Wireless: HSPA+ Multiflow from NSN

HSPA+ Multiflow enables simultaneous transmission of two data streams from base stations in two adjacent cells to a single user device instead of one data stream from one base station as is the case with HSPA+ today. Overall, this can up to double throughput (data speeds) for users at cell edge. (from NSN press release)

http://www.engadget.com/2012/02/20/nokia-siemens-hspa-multiflow/

http://www.nokiasiemensnetworks.com/news-events/press-room/press-releases/nokia-siemens-networks-delivers-faster-more-flexible-4g-hspa-mwc12

Mobile: 가트너 Q4 2011 모바일폰 통계 발표

Source: http://www.gartner.com/it/page.jsp?id=1924314

스마트폰 운영체제의 경우 안드로이드가 시장의 절반을 차지하며 1위. 그러나, Apple 혼자 파는 iOS는 23.8%나 차지하면서  기존 시장 1위 Symbian을 제치고 말았다. 작년과 비교해보면 격세지감. RIM은 꾸준히 하락 중이고 MS도 힘 못받는 상태. 역시 시장은 안드로이드와 iOS로 양분되고 있는 상태. 과연 MS의 Windows Phone이 삼국지의 형세를 만들 수 있을 것인가?

모바일 폰 전체 판매량은 여전히 노키아가 1위. 하지만 계속 감소되는 추세이며 스마트폰에서 힘을 받지 못하고 있어 수익률은 악화되고 있는 현실. 삼성은 안드로이드에서 잘 하고 있어 시장 2위를 가뿐하게 차지하고 있으며 Apple은 계속 승승장구하여 끝내 3위 자리를 차지하고 말았다. 기존 3위인 LGE는 ZTE에게도 밀리며 5위권으로 주저앉은 모습이다. 국내 신문들 기사를 보면 LGE 주식을 사라고 부추키는 기사들이 많던데 무슨 근거로? LTE 폰 잘 팔린다고는 하지만 아직 시장은 3G가 대세... Apple도 언제가는 LTE 폰이 나올 것이고. 그럼 LTE 분야에서도 판세가 바뀔 듯.

Company	4Q11 Units	4Q11 Market Share (%)	4Q10 Units	4Q10 Market Share (%)
Nokia	111,699.4	23.4	122,278.1	27.1
Samsung	92,682.3	19.4	79,168.7	17.5
Apple	35,456.0	7.4	16,011.1	3.5
ZTE	18,915.1	4.0	9,033.9	2.0
LG Electronics	16,938.3	3.6	30,119.1	6.7
Huawei	13,966.2	2.9	7,824.0	1.7
Research In Motion	13,184.5	2.8	14,762.0	3.3
HTC	10,837.4	2.3	8,907.0	2.0
Motorola	10,075.3	2.1	10,908.4	2.4
Alcatel	9,004.7	1.9	7,997.9	1.8
Others	143,795.8	30.2	145,026.3	32.1
Total	476,554.9	100.0	452,036.5	100.0

Source: Gartner (February 2012)

참고: 
http://www.stacktistics.com/의 통계를 보면 iOS보다 Android 관련하여 어플 개발자들의 관심이 더 높은 것으로 보인다. Windows Phone의 경우도 꽤나 높은 (9.8%)의 성장세를 보이고 있어 관심이 높아지고는 있는 것으로 보인다. 특히, 20.7%의 가파른 성장세(?)를 보이는 phoneGap의 경우 개발사인 Nitobi를 Adobe가 인수하여 관심이 급속히 늘고 있는 것 같다.

Position	Platform	Questions 2012-02-15	Questions 2012-01-15	Delta	%
1	android	144685	133667	11018	8.2
2	iphone	120756	116327	4429	3.8
3	windows-phone-7	8417	7668	749	9.8
4	blackberry	5679	5408	271	5.0
5	java-me	4029	3845	184	4.8
6	phonegap	2938	2435	503	20.7
7	symbian	804	795	9	1.1
8	webos	234	227	7	3.1

Linux: Enable Wi-Fi for Ubuntu on Mac Mini

http://www.ubuntubuzz.com/2011/10/macbook-pro-wireless-broadcom-bcm4331.html

This link provides instruction to enable Wi-Fi for Ubuntu on Mac Mini (or MacBook) with BCM4331 Broadcom.

But, one modification needed from the article. You should use the '01-Feb-2012' version of compat wireless 2.6 release from "http://wireless.kernel.org/download/compat-wireless-2.6/" link. If not, Wi-Fi connection speed is limited in 802.11b as I tested.

Good luck!

Linux: some VIM tips for your programming

Tips for VIM which can be useful for programming jobs

- Open file at a location that was last viewed
==> http://superuser.com/questions/111016/vim-open-file-at-location-that-was-last-viewed

- Code completion (you can see how it works from the below screen shot)
==> http://amix.dk/blog/post/19021

- See manual at cursor
==> 'K' on function name

- Do not use space as tab for Makefile
==> 'autocmd FileType make setlocal noexpandtab' from VIMRC

- Edit your own VIMRC
==> e $MYVIMRC

- How to use gcc compiler with make?
==> 'compiler gcc' from VIMRC. Type 'make' from VIM command input.

- Ctags usage
==> http://stackoverflow.com/questions/563616/vim-and-ctags-tips-and-tricks

- Find string and open file
==> Ctrl-W, I

- TODO: Need to check later
==> https://github.com/Rip-Rip/clang_complete/

Linux: FUSE and thread termination

These days, I'm trying to write a file system via FUSE. During the debugging, I found that if I want to use threads with pthread, I need to create my own thread from init function of fuse operations.

If I create thread from main function before I call fuse_main, my thread will be terminated soon after fuse_main function calling.

I saw the FAQ of FUSE and it mentioned all thread should be created from init because when the FUSE process goes to background the threads which was started before fuse_main will be exited. Please see the below references.

References:

• How should threads be started?: http://sourceforge.net/apps/mediawiki/fuse/index.php?title=FAQ#How_should_threads_be_started.3F
• http://fuse.sourceforge.net/

Linux: How to kill specific process with it's name?

If you want to find a process named "testapp" and kill it, how can you do this?


ps -ef | grep testapp | head -n 1 | fmt -u | cut -d ' ' -f 2 | xargs kill -9

But, this is too complex solution for simple issue. I just can use 'killall'. Such as 'killall testapp'.
It's still interesting to learn Linux tools to manipulate text data. (such as head, cut, fmt ...)

References:

• Learning GNU text utilities
• Text manipulation tools

Wireless: LTE phones in Korea

LTE mobile phones in Korea market today (26-Jan-2012)

• Samsung Galaxy S2 LTE  (SK Telecom)
• Samsung Galaxy S2 HD LTE  (SK Telecom, LGU+, KT)
• Samsung Galaxy Note  (SK Telecom, LGU+, KT )
• LG Optimus LTE  (SK Telecom, LGU+)
• Pantech Vega LTE  (SK Telecom)
• Pantech Vega LTE M  (SK Telecom, KT)
• Pantech Vega LTE EX  (LGU+)
• HTC Raider 4G  (SK Telecom)