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Showing posts with label XGP. Show all posts
Showing posts with label XGP. Show all posts

Tuesday, 21 February 2012

Softbank Japan's Ultra Wifi 4G (a.k.a AXGP)


In Japan, they love to re-brand the standard technologies into something more interesting to attract people's attention. In a way they are right as they want to offer a service rather than a technology. Couple of years back NTT Docomo launched its Crossy service, that was offering LTE with upto 75Mbps dl speeds. Yesterday, I read about Softbank launching their 4G service that is based on AXGP format.

I did blog about XGP many years back but AGXP, which stands for Advanced XGP may not be very well related to XGP. According to ZTE Technologies magazine:

In November 2011, Japan’s third largest mobile operator, Softbank, made AXGP commercially available. AXGP is similar to TD-LTE, and has been deployed in Japan in conjunction with ZTE and Huawei. Two thousand base stations were built in the fi rst phase, and there will be up to 10,000 base stations built in the second phase. Ninety-nine percent of the Japanese population will be covered by 2012. So far, the Softbank network is the largest commercial TD-LTE network in the world. Wang Jianzhou, chairman of China Mobile, said, “If in the past the TD-LTE network was just a stratagem on paper, now it has turned into a reality.”

The following are some more details edited from a Japanese website (translation via Chrome):


High-speed data communication service Wireless City Planning of the SOFTBANK Group (Wireless City Planning, WCP) will be scheduled after February 2012, adopted a new communication method AXGP is, in excess of up to 100Mbps downlink high-speed communication is a feature . It was an opportunity to use the test machine prior to the start of service for general users, to report a sense of its use. 


 "AXGP" was developed inherit the "PHS" next generation of Willcom

 "AXGP" high-speed data transmission technology WCP employs a technology that was originally planned to use the 2.5GHz band has been assigned from the Ministry of Internal Affairs and Communications Willcom to deploy as "PHS" next generation. Had to expand the limited service area and some intended for users under the name of "WILLCOM CORE XGP" PHS is then the next generation, business is XGP is "Wireless City Planning" of Softbank subsidiary company under the reorganization proceedings of Willcom inheritance. Provide the service as "AXGP" form of communication is an evolved version of XGP in WCP.


 AXGP, in addition to the XGP also hand while inheriting the "micro cell" was characteristic of PHS, PHS has been developed as the next generation, that have become compatible with the method of TD-LTE. Including China and India, that are compatible with the TD-LTE system is expected to expand in many parts of the world, the benefits can be expected that international expansion is expected. 

 Service is initially started up to 76Mbps. The first bullet is the mobile router products

 AXGP is at present, but services have been provided for users in a small part had been using the service test XGP Willcom old, since the February 2012 service "SoftBank 4G for general users as MVNO Softbank Mobile plans to start ". The communication speed up to 110Mbps downstream and 15Mbps and maximum upstream and downstream speeds in excess of 100Mbps for speed has become a feature.


 At the start of service, the mobile router will "101SI" made of (SII) will be released at the same time Seiko Instruments. However, 101SI has become a maximum 76Mbps to 110Mbps falling down is the theoretical value of the service, at the start of the service is not provided in the full spec. Terminal is planned to also provide support AXGP Then, in the year 2012 is also powered smartphone will be compatible with AXGP. In addition, "101SI" to support (42Mbps maximum downlink, 5.7Mbps uplink maximum) "ULTRASPEED" Softbank mobile. 




Ultra-high speed in the area. Hope to plan area at the time of service and rates

 Although a measurement with the outdoor area was limited, with respect to communication speed was very good results with the results fit. Most favorable conditions and even the user does not exist before the start of the service say that already provide services as high-speed data communication, "Xi" of NTT DoCoMo, Inc., or UQ Communications 37.5Mbps, which is the maximum theoretical value of outdoor (Kurosshi~i) It was also a number greater than the maximum 40Mbps "UQ WiMAX" of is very encouraging.


 However, the decisive factor in mobile data communications is not only communication speed, three elements of the communication charge is important and easy-to-use, deployment area, including "ease of connection." In the area at the moment of some are very fast and are limited in the Yamanote Line, but is a matter of course in order before the service, ease of connection of the fact there are many parts of the still unknown. Also, I'd be anxious and services are provided in the fee structure what.


 SoftBank is to introduce a flat-rate voice among their users ahead of any other mobile phone operators so far, campaigns expand the iPhone however any inexpensive flat-rate packet. Further has a track record of just made me started to increase subscribers by the "straight-line with anyone" WILLCOM has also continued to decline in subscribers. Softbank Mobile also be deployed as a MVNO, at the time of release of the service that you want to use the AXGP expect a bold expansion of unique services and Softbank WCP, which is the same group Softbank.


Softbank's website is billing this as 'Ultra Wifi 4G' and will be launched to public this Friday, just in time for MWC12.

Wednesday, 10 September 2008

Japan to trial its own 4G Technology

While we were focussing on the battle between LTE and WiMAX having already forgotten about UMB, Japan has been working on its Next G of PHS called the XGP.


The news came to light in ITU Telecom Asia, which concluded recently.


PHS was popular in Japan earlier on because it was very cheap and easy to deploy in the old days when other technologies were expensive. The main drawback it has is that it is not easy to perform handovers so the calls may drop while in the subway.

PHS operator WillCom has won, one of the spectrum block in 2.5GHz band and is going to start trials next April in Tokyo, Nagoya and Osaka and offer 20Mbps of symmetrical data speeds using a 10MHz spectrum block. A full commercial service is scheduled for August 2009.
The service will be known as WILLCOM CORE (Communication Of Revolution and Evolution)
The technology behind is based on the PHS architecture of numerous microcells offering limited coverage, but will incorporate a new air radio interface based on OFDMA/TDMA/TDD methodologies. Kyocera and UTStarcom will manufacture the radio access equipment for XGP while NEC Infrontia and NetIndex are developing the data card modules for the service. Canada’s Wavesat and Israel’s Altair is supplying the baseband chips for XGP. Like LTE and WiMAX, XGP will support viable spectrum blocks.

But while LTE and WiMAX are based on increments of 1.6MHz for its carrier size, XGP has aligned itself with CDMA and supports increments of 1.25MHz carriers.

With a basic 10MHz carrier system, XGP will offer data speeds of 20Mbps, but future systems incorporating MIMO and SDMA (space division multiple access) will be capable of supporting maximum symmetrical data speeds of 100Mbps. At the same time, the technical description for XGP will support handoffs between base stations for users travelling at up to 300 km/h.

A good presentation from Willcom on XGP is available here.

PHS = Personal Handyphone System