9. NEED FOR SPEED SHIFT £3.99 With 20 supercars and 18 tricky tracks to master, this title, currently reduced, is a winner.
Monday 18 January 2010
Top 10 paid iPhone apps
9. NEED FOR SPEED SHIFT £3.99 With 20 supercars and 18 tricky tracks to master, this title, currently reduced, is a winner.
Sunday 17 January 2010
Mobile Phones transforming Africa
The mobile phone is turning into Africa's silver bullet. Bone-rattling roads, inaccessible internet, unavailable banks, unaffordable teachers, unmet medical need – applications designed to bridge one or more of these gaps are beginning to transform the lives of millions of Africans, and Asians, often in a way that, rather than relying on international aid, promotes small-scale entrepreneurship.
While access to a fixed landline has remained static for a decade, access to a mobile phone in Africa has soared fivefold in the past five years. Here, in one of the poorest parts of the globe, nearly one in three people can make or receive a phone call. In Uganda, almost one in four has their own handset and far more can reach a "village phone", an early and successful microfinance initiative supported by the Grameen foundation.
One recent piece of research revealed how phone sharing, and the facility for phone charging, has been an engine of this small-business revolution. Particularly in rural areas, a small investment in a phone can first create a business opportunity, then maximise its reach by overcoming the possible limitations of real or technological illiteracy – because the phone operator can make sure the call gets through, and can cut off the call at exactly the right moment to avoid wasting any part of a unit. And what a difference a phone call can make.
Often the mere fact of being able to speak to someone too far away to meet with easily can be a transforming experience. For fishermen deciding which market is best for their catch, or what the market wants them to fish for, a phone call makes the difference between a good return on the right catch or having to throw away the profit, and the fish, from a wrong catch. For smallholders trying to decide when or where to sell, a single phone call can be an equally profitable experience.
But establishing market conditions is just the start. Uganda has pioneered cash transfers by phone through the innovative Me2U airtime sharing service, which allows a client to pay in cash where they are and transmit it by phone to family or a business associate hundreds of miles away. They receive a unique code that they can take to a local payment outlet to turn into cash.
But the market leaders are M-PESA, a mobile money system set up by Safaricom, in its turn an affiliate of Vodafone, in Kenya (although it operates in Uganda now too). Less than three years old, it has 7 million customers and, according to some sources, processes as much as 10% of Kenya's GDP.
At a recent International Telecommunications Union session, Nokia's Teppo Paavola pointed out that there are 4 billion mobile phone users and only 1.6 billion bank accounts. The huge scope for providing financial services through mobile phones represented by that differential is a tempting prospect for the big players.
But, as one British contender, Masabi, has discovered, it is one thing to develop a secure mobile payment system like their Street Vendor - which works on old handsets and in most scripts – and quite another to get a deal with the international financial regulators that police cross-border cash flows.
Masabi has worked with another UK company, Kiwanja.net, that aims to help NGOs and other not-for-profit organisations use mobile technology.
Ken Banks, founder of Kiwanja.net (Kiwanja means "earth" in Swahili) has pioneered a two-way texting system called FrontlineSMS that allows mass texting from a single computer-based source to which individual subscribers can reply.
So for example, health workers attached to a hospital in Malawi can "talk" to their base to seek advice, pass on news of patients' progress or ask for drug supplies. The data can be centrally collected and managed. All that's needed is a mobile signal – far more available than an internet connection.
FrontlineSMS is a free download: the aim is not to tell users what to do, but to help them work out how to apply the technology to their own problem.
The only barrier to even greater mobile use, apart from international financial regulations, are the taxes levied by national governments that can make the cost prohibitive. According to one recent report, despite exponential growth in countries like Uganda there is growing evidence that what for millions is a life-changing technology risks leaving out the poorest.
Saturday 16 January 2010
Mobile Trends in 2020
Friday 15 January 2010
2.6 GHz LTE Spectrum Band Report
The licensing of the 2.6 GHz band will be critical to unlocking the benefits of global scale economies in the Mobile Broadband market, according to a new report* by US-based research firm Global View Partners in partnership with the GSMA. The research found that the 2.6 GHz spectrum, which has been identified globally by the ITU as the ‘3G extension band’, will be vital in satisfying the demand for greater capacity for Mobile Broadband and launching next-generation networks such as LTE, which will start to be deployed commercially around the world this year.
“There is clear evidence that the volume of data flowing over mobile networks is growing rapidly and is being accelerated by the popularity of smart phones and the growth in music and video downloads,” said Tom Phillips, Chief Regulatory Affairs Officer at the GSMA. “The report highlights that the 2.6 GHz band will allow operators to address rapidly increasing traffic volumes in an efficient and harmonised way. Recent licensing of this band in Hong Kong, Norway, Finland and Sweden, for example, has highlighted that there is more demand for paired (FDD) than unpaired spectrum (TDD) and that the ITU’s recommended Option 1** plan is the best structure to stimulate market growth in a technology-neutral and competitive environment.”
In Europe, measurable progress has been achieved towards the allocation of the 2.6 GHz frequency, as specified in the ITU Option 1 plan. There is widespread agreement at the member state and European Union level that this objective will best be fulfilled in a manner that is harmonised and coordinated across all countries in the region. The research suggests that leaving the band unstructured for auctions or with a diverse mix of non-harmonised FDD and TDD allocations should be avoided. Potential challenges include interference management, resulting reductions in usable bandwidth and loss of coverage in border regions, as well as higher costs and delayed equipment availability.
The research also points out that in many cases, the 2.6 GHz frequency will be the first opportunity for mobile operators to acquire 2x20 MHz of contiguous spectrum, enabling them to operate high-speed LTE services at optimum performance. LTE is the next-generation Mobile Broadband technology for both GSM and CDMA operators, and will leverage new and wider bandwidths to significantly increase data capacity in high demand zones such as dense urban areas. The 2.6 GHz spectrum is the ideal complement to the 700 MHz spectrum, also known as ‘digital dividend’, and will enable the most cost-effective nationwide coverage of Mobile Broadband across both rural and urban environments.
Governments in most Western European countries as well as in Brazil, Chile, Colombia, and South Africa are planning to award 2.6 GHz frequencies within the next two years.
The Report is available HERE.
Thursday 14 January 2010
Temporary Identities in LTE/SAE - 2: RNTI's
RNTI or Radio Network Temporary Identifier(s) are used primarily by eNB Physical Layer for scrambling the coded bits in each of the code words to be transmitted on the physical channel. This scrambling process in PHY happens before modulation. There is a sequence followed for scrambling, calculation of which depends on the RNTI(UE specific for channels like PDSCH,PUSCH) and cell specific (for broadcast channels like PBCH). Details could be found in [2].
The following table lists different kinds of RNTI's:
Lets look at some of these in slightly more detail:
P-RNTI (Paging RNTI): To receive paging messages from E-UTRAN, UEs in idle mode monitor the PDCCH channel for P-RNTI value used to indicate paging. If the terminal detects a group identity used for paging (the P-RNTI) when it wakes up, it will process the corresponding downlink paging message transmitted on the PCH.
SI-RNTI (System Information RNTI): The presence of system information on DL-SCH in a subframe is indicated by the transmission of a corresponding PDCCH marked with a special System Information RNTI (SI-RNTI). Similar to the PDCCH providing the scheduling assignment for ‘ normal ’ DL-SCH transmission, this PDCCH also indicates the transport format and physical resource (set of resource blocks) used for the system-information transmission.
M-RNTI (MBMS RNTI): Used in Rel-9 for MCCH Information change notification.
RA-RNTI (Random Access RNTI): The RA-RNTI is used on the PDCCH when Random Access Response (RAR) messages are transmitted. It unambiguously identifies which time-frequency resource was utilized by the UE to transmit the Random Access preamble. If multiple UEs had collided by selecting the same signature in the same preamble time-frequency resource, they would each receive the RAR.
C-RNTI (Cell RNTI): The C-RNTI to be used by a given UE while it is in a particular cell. C-RNTI allocation and details are too complex to explain in the blog so please refer to Nomor newsletter here.
TC-RNTI: When the UE does not have allocated C-RNTI then Temporaru C-RNTI is used. A temporary identity, the TC-RNTI, used for further communication between the terminal and the network. If the communication is successful then TC-RNTI is promoted eventually to C-RNTI in the case of UE not having a C-RNTI.
SPS-C-RNTI (Semi-Persistent Scheduling C-RNTI): For the configuration or reconfiguration of a persistent schedule, RRC signalling indicates the resource allocation interval at which the radio resources are periodically assigned. Specific transmission resource allocations in the frequency domain, and transmission attributes such as the modulation and coding scheme, are signalled using the PDCCH. The actual transmission timing of the PDCCH messages is used as the reference timing to which the resource allocation interval applies. When the PDCCH is used to configure or reconfigure a persistent schedule, it is necessary to distinguish the scheduling messages which apply to a persistent schedule from those used for dynamic scheduling. For this purpose, a special identity is used, known as the Semi-Persistent Scheduling C-RNTI (SPS-C-RNTI), which for each UE is different from C-RNTI used for dynamic scheduling messages. - Source: LTE, The UMTS Long Term Evolution: From Theory to Practice By Stefania Sesia, Issam Toufik, Matthew Baker
TPC-PUCCH-RNTI (Transmit Power Control-Physical Uplink Control Channel-RNTI) and TPC-PUSCH-RNTI (Transmit Power Control-Physical Uplink Shared Channel-RNTI): The power-control message is directed to a group of terminals using an RNTI specific for that group. Each terminal can be allocated two power-control RNTIs, one for PUCCH power control and the other for PUSCH power control. Although the power control RNTIs are common to a group of terminals, each terminal is informed through RRC signaling which bit(s) in the DCI message it should follow.
The following table lists the values that are assigned to different RNTI's in MAC:
[1] 3GPP TS 36.321 - Evolved Universal Terrestrial Radio Access (E-UTRA) Medium Access Control (MAC) protocol specification
[2] 3GPP TS 36.211 - Evolved Universal Terrestrial Radio Access (E-UTRA); Physical Channels and Modulation
Wednesday 13 January 2010
Takehiro Nakamura on LTE Radio Aspects
Release 9 - an enhanced version of Release 8 and additional features;
Release 10 (LTE-Advanced) - proposed as an IMT-Advanced and is expected to be approved by December 2010; major differences between LTE and LTE-Advanced
Tuesday 12 January 2010
Google may be the new hate figure in mobile industry
Link: http://www.theregister.co.uk/2010/01/08/google_nexus_partner_friendly/
Monday 11 January 2010
Technologies and Standards for TD-SCDMA Evolutions to IMT-Advanced
Thursday 7 January 2010
Morgan Stanley's 'The Mobile Internet Report'
But it does discuss SMS to some degree, and briefly mentions MMS and 'non 3G' internet such as in China (ie WAP). It is also very good making analysis of Japan's mobile internet (including i-Mode before 3G). Totally worth downloading and reading.
Now a few key highlights. The total mobile data industry for 2009 worth... 284 Billion dollars. Wow. Morgan Stanley says it grew 20% this year (while the global economy shrunk 5%). For those who were looking for regional splits of phone market shares or smartphone market shares - this report has them. It says that the modern smartphone is equivalent to a desktop PC 8 years ago in performance. Haha, fave topic of mine - they also say that for internet content consumption - the mobile is 'better' in at least four areas (but not in every case). These 4 are email, VoIP, news and social networking. And they tell us that the value of paid digital content on mobile phones is 4x as big as the value of paid digital content on the PC internet.
And yes, hundreds of more data points, stats and tons of good graphs to help explain. Totally worth downloading, reading and quoting. Enjoy
Wednesday 6 January 2010
3.9G (LTE) to 4G
Tuesday 5 January 2010
3GPP IMT-Advanced Workshop in Beijing
- LTE technologies (Takehiro Nakamura: TSG-RAN Chair, NTT DOCOMO)
- Physical layer aspects (Matthew Baker: RAN WG1 Chair, Alcatel-Lucent)
- Layer 2 and 3 aspects (Magnus Lindström: RAN WG2, Ericsson)
- RAN architecture aspects (Dino Flore: RAN WG3 Chair, Qualcomm)
- RF aspects (Takaharu Nakamura: RAN WG4 Chair, Fujitsu)
- 3GPP Self evaluation methodology and results (Tetsushi Abe: RAN WG1 Vice-Chair, NTT DOCOMO)
Monday 4 January 2010
LTE Release-8 UE Categories table
Sunday 3 January 2010
Interesting Presentation on Mobile Social Networking in Japan
3G4G Stats
- At the peak (Oct.), the combined page views for both of them reached around 100,000
- In the quietest month (Dec.), the combined page views were around 75,000
- The 3G4G blog has page views from 22,000 (Dec) to 35,000 (Oct).
- The popular pages of the Website are FAQ, LTE and LTE-Advanced.
- The popular pages of the blog are HSPA+ vs LTE, OFDM/OFDMA Difference and F-DPCH.
Thursday 17 December 2009
Happy Holidays and Happy New Year 2010
WiMAX gaining foothold in Japan
The current state of the mobile network environment such as public wireless LAN and the cellular phone lines and those problems were considered last time. This time, the focus is applied to “Mobility WiMAX” of the new service that solves these problems, and it introduces the difference with an existing mobile network. The 2nd explains the point of the IEEE standard by which the specification of mobile WiMAX has been decided.
Mobile WiMAX that the business service started in July, 2009 is a new mobile network that did “Cousin removing” of public wireless LAN and the cellular phone line. It becomes “Communication method of the world standard using the micro wave (frequency band of 3GHz-30GHz)” with WiMAX if it translates literally by the one that “World Interoperability for Microwave Access” was abbreviated.
It is a word “Communication (Access)” the hope of you attention here. “Line from the telephone office to the terminal” is indicated if it is said, “Access line” in the world on the network. In a word, WiMAX is a method to achieve the same role as the accomplishment of “[Furettsu] light” of ADSL and NTT on a wireless network.
Actually, there is details of having started WiMAX as a network for not the mobile network but fixed wireless telecommunications (FWA: Fixed Wireless Access). FWA is a method to send and receive data to the antenna set up in the rooftop in the communication tower and the building between terminals. FWA up to maximum transmission speed 156Mbps is an opening in Japan in December, 1998.
WiMAX is wireless MAN(Metropolitan Area Network) standard to achieve this FWA. Institute of Electrical and Electronic Engineers (IEEE) has approved WiMAX as “IEEE 802.16″ in December, 2001.
The bandwidth of 2GHz-11GHz was added back though WiMAX used the bandwidth of improving named 10GHz-66GHz at first. And, the specification named maximum transmission speed 134.4Mbps (occupation bandwidth 28MHz time) or 74.81Mbps (occupation bandwidth 20MHz time) was fixed by the maximum in “IEEE 802.16-2004″ that had been approved in June, 2004 communication distance 48km.
It has corresponded to the handover at 120km per hour.
It reaches up to 4.8km at the speed of 40Mbps or less.
Mobile WiMAX equipped in mobile PC is a wireless network method settled on as derivation standard “IEEE 802.16e” of IEEE 802.16.
Mobility WiMAX is that the maximum difference point of fixation WiMAX of IEEE 802.16 and mobile WiMAX corresponds to the handover (succession) that assumes the movable body of 120km per hour.
In a word, mobile WiMAX is to be able to use it in the train and the car running just like the cellular phone because a surrounding base station communicates one after another in “Hand over” according to the communication situation. There is especially no inconvenience if it thinks the communication distance of the cellular phone is several km though the maximum communication distance of mobile WiMAX is 4.8km and fixation WiMAX 1/10.
It differs according to the occupation bandwidth, and if it is 32Mbps, and it is 20MHz if it is 15Mbps, and 10MHz if the occupation bandwidth is 5MHz, the maximum transmission speed of mobile WiMAX is 75Mbps. In UQ communications that develop mobile WiMAX service domestically, it is sung, “It is 40Mbps or less, and is up-loading, and it is download and 10Mbps or less”. It may be expected that the same degree of the speed as wireless LAN in the office will be obtained as long as the condition is avoided.
Another difference between fixation WiMAX and mobile WiMAX is in the size of the terminal side transmitter-receiver. In fixation WiMAX where long distance/high speed has been achieved by a big transmission output, a considerably big as for terminal side device is needed. On the other hand, the transmitter-receiver of mobile WiMAX is being put in several LSI chips small. An external type is the same degree of the size as USB thumb drive.
Moreover, note PC with built-in controller for mobile WiMAX has been released by each vender since the summer of 2009. The “Let’snote S8/N8″ series of Panasonic especially supports WiMAX by the standard in the consumer model (A corporate model is for subject).
Another strong point is a base station. Wide, mobile WiMAX covers the range where the electric wave reaches and even if the number of base stations is not increased too much, can cover the large range at the cellular phone level. Because it is possible to communicate while it moves by in the train and car, it will be able to be said that it will be a very profitable network for the business user who frequently uses the Web application.
The maintenance of the base station is advanced in domestic various places with steady steps now. I hear that it became possible to use in the government-designated major city and major cities across the country at the end of fiscal year 2009 according to UQ communications.
Note, this is machine translation so ignore the errors.