[Galaxy S II Android Development] drdoulittle:
HSDPA and HSUPA is only ne extension of UMTS, like that as it GPRS and EDGE for GSM are, the frequency remain the same, otherwise man would have to each time buy n new mobile phone, gives still enough the n old GSM and with GPRS or EDGE nothing to finally begin not to have been able or hear. And nevertheless more river used thereby the modem this receipt to keep stable can is used the river mainly with the constant change from 3G to H or H+. And from there it is important which one a modem has which to stable the frequency hold can in addition, then a higher consumption of Enegrie is to be noticed, but not as extremely as with constant change a bad modem constantly the frequency loses there and again to also constantly connect must. The Rootbox did not have a possibility HSDPA/HSUPA to receive there two important files to be missing and in v1.8 follow now (Look OP bajee in the first Side). Besides the H+ icon is missing which 4G is the fact that one must only exchange, the files uses and then receives also the AOKP Rootbox H+ and makes bajee11 straight for the v1.8 then comes.

Frequencies for UMTS/HSPA

Here the excerpt:

UPLINK DOWLINK BOUND

I 1920 - 1980 MHz 2110 - 2170 MHz

II 1850 - 1910 MHz 1930 - 1990 MHz

III 1710 -1785 MHz 1805 - 1880 MHz

IV 1710 -1755MHz 2110 - 2155MHz

V 824 - 849MHz 869 - 894MHz

VI 830 - 840 MHz 875 - 885 MHz

VII 2500 - 2570 MHz 2620 - 2690 MHz

VIII 880 - 915 MHz 925 - 960 MHz

IX 1749,9 - 1784,9 MHz 1844,9 - 1879,9 MHz

X 1710 - 1770 MHz 2110 - 2170 MHz

XI 1427,9 - 1452,9 MHz 1475,9 - 1500,9 MHz

XII 698 - 716 MHz 728 - 746 MHz

XIII 777 - 787 MHz 746 - 756 MHz

XIV 788 - 798 MHz 758 - 768 MHz

In Europe we transmit I. in volume.

HSPA

In UMTS nets the designation HSPA (High speed pack ACCESS) is located as generic term for fast surfing in the UMTS net. Owing to the new technology of the HSDPA a importantly more faster mobile Internet is possible. Surf in the Internet or the treatment of enamels with speeds of up to 7,2 MBit/s, are possible depending upon offered stage of development. This also technology in the UMTS net, called 3G, is not surface covering offered to the offerers however yet.

HSPA+

The term HSPA+ designates a new further stage of development of the HSPA. With this stage are download speeds of up to 28 MBit/s and also substantially higher upload speeds to be possible. A further increase the download speeds on up to 42 MBit/s should be still possible according to Mobilkom. Thus then the end would be reached with of UMTS possible transmission capacities.

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LTE

As LTE as a possible successor of UMTS is regarded of the standard. The designation LTE means „Long term evolution “. In a completely new mobile telephony generation, which calls itself then NGMN, then still higher transmission rates would be possible. First tests with T-Mobile Austria reached a speed of 130 MBit/s in the Downstream according to information of T-Mobile for the first time world-wide. With this test devices were inserted by Huawei. T-Mobile already suggested that starting from 2010 on an introduction of this standard can be counted.

Why the LTE is all the many faster technology in relation to UMTS the standards HSDPA and HSUPA, lies in the technology justified, which is used with the LTE technology.

On the one hand there are new procedures for the coding with the LTE technology. That is with the download of the OFDMA (orthogonal frequency division multiple ACCESS) and with upload SC-FDMA the case. SC-FDMA is similar to the OFDMA and is used, in order to reduce the power absorption from the LTE technology supporting devices to. The use of the OFDMA technology leads among other things also to the fact that the LTE technology is called also HSOPA (High speed OFDM pack ACCESS).

The two techniques OFDMA and SC-FDMA are inserted, in order to divide the existing range into many small narrow-band carriers, the so-called Subcarrier. Since OFDMA for the multi-user enterprise was developed, appropriate range can be assigned so to the users only your requirements.

By splitting up the entire range this with the LTE technology used standard becomes among other things also less susceptible to disturbances. Further a higher range is available by this splitting up in other place, which can be claimed by users, who need at this time a higher range. A small disadvantage of the LTE technology participates that for coding and decoding the subcarriers a increased current consumption develops.

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HSUPA

With the HSUPA UMTS clearly higher Uplink speeds can standard be obtained compared with standard. The contraction HSUPA meant „High speed Uplink pack ACCESS “. With suitable maps and the suitable net cover for the HSDPA standard for the mobile Internet standards Upstream speeds up to 1,45 MBit/s can be reached owing to the HSUPA.

UMTS

With UMTS a mobile telephony standard is marked, which offers faster data transfer than into in the cellular radio systems the past GSM nets. UMTS (Universal Mobile Telecommunications System) is suitable from there not only for telephony, but also for the different data and multimedia of services. There for example applications would be like mobile Internet, video telephony or also Videostreaming. Since UMTS is available at present in different stages of development, also different tariffs for this service are offered.

GSM

GSM is the standard most established at present in the range of the mobile telephony technologies. The term GSM stands for mobile Communications for „Global System for “. With this transfer technology telephony, short reports and packet-switched data transfer are operated. The basic idea to GSM was to be made available European-wide a technology for mobility. This net standard was already inserted 1992 in the Federal Republic. For this time the use of mobile phones in the Federal Republic rose enormously.

GPRS

GPRS is an package-oriented transmission service in the mobile telephony range, which makes the transmission of MMS or WAP for sides possible. With GPRS data under package orientation, which were changed before with the sender into individual packets transported to the receiver, become. These packets are again built up here, with the receiver. Due to the fact that with the GPRS connection no constant contact exists to the receiver, but only for the short time of the data transfer, in this service the furnished achievements are accounted for after the transferred data set.

Good Night