Sierra Wireless intros Apex 880 USB HSUPA modem

Sierra Wireless sure doesn't seem to be skimping when it comes to USB HSUPA modems, with it now following up its recently-released 880U and 881U models with its new and somewhat improved Apex 880 modem. About the biggest addition here is an always useful microSD card slot, which should let you ditch at least one USB thumb drive from your bag. The modem itself is also slightly smaller than the previous models, measuring just 85mm x 37.5mm x 15mm. Otherwise, you'll get the same peak data speeds of 7.2 Mbps on the downlink and 2.0 Mpbs on the uplink as before, and support for tri-band UMTS and quad-band GSM/ EDGE networks to keep you connected at all times. No word on a price just yet, but it'll apparently be available in January.

[Via Electronista]

modem hsupa promate ego5

Promate eGo5 is a HSUPA USB modem / WCDMA that provides internet connection speed HSPA network up to 3.75 G. A wireless data card 3G/3.5G/3.75G reply with a sophisticated multi-access mode that ensures a new level of speed, stability and reliability. Dual-mode system to ensure compliance as a flash data storage store and retrieve documents with ease. T-flash card reader provides enhanced unlimited storage and USB form makes it easy to connect to each computer
Specifications:

1.Akses high speed internet is 3.75G HSUPA
2. HSUPA up to 5.7Mbps uplink, downlink up to 7.2 Mbps
3. EDGE MS Class 12 (up to 4 Tx 4 Rx 5 Total)
4. WCDMA, HSUPA, EDGE, GPRS, UMTS, and GSM Circuit Switched Data
5. Dual Band WCDMA / HSPA (850MHz/2100MHz)
6. Quad Band EDGE 850/GPRS 900/GSM 1800/GSM 1900 + PCS
7. Meet the standard GSM and WCDMA Release 99
8. Solution for suitability Basecom OS
9. Microsoft Windows 2000/XP/Vista/MAC 10.4 and above

Telstra Boosts Next G’s Uplink Speed To 5.8Mbps

By Nick Broughall

You’ve got to give it to Telstra: Even though you pay for it dearly, their Next G network keeps advancing leaps and bounds beyond what any of the other networks have to offer. First there was the speed bump to 21Mbps download speeds, and now they’ve bumped up the upload speeds to 5.8Mbps.

Like the 21Mbps figure, the 5.8Mbps is only a theoretical maximum – in the real world you’re more likely to get speeds of 300Kbps to 3Mbps in capital cities, or up to 1Mbps everywhere else. For comparison, Optus’s HSPA network has a theoretical maximum of 2Mbps uplink, with real world speeds in metro areas varying between 150Kbps and 1.5Mbps (or 1.1Mbps in regional areas). Telstra reckon that this speed boost makes uploading stuff about 3 times faster than before.

The uplink speed boost will work with the Telco’s 21Mbps HSPA modem straight away with a firmware upgrade available from Sierra Wireless’ website, while other NextG and BigPond customers will have the update made available in the coming weeks.

[Telstra]

Fundamental difference between HSDPA and HSUPA

It has been long time since HSDPA and HSUPA came into existence. Untill now we have read and implemented many features related to HSDPA and HSUPA. However following are the basic difference between HSDPA and HSUPA:

• In the downlink, the shared resource is transmission power and the code space, both of which are located in one central node, the NodeB. In the uplink, the shared resource is the amount of allowed uplink interference, which depends on the transmission power of multiple distributed nodes, the UEs.
• The scheduler and the transmission buffers are located in the same node in the downlink, while in the uplink the scheduler is located in the NodeB while the data buffers are distributed in the UEs. Hence, the UEs need to signal buffer status information to the scheduler.
• The WCDMA uplink, also with Enhanced Uplink, is inherently non-orthogonal, and subject to interference between uplink transmissions within the same cell. This is in contrast to the downlink, where different transmitted channels are orthogonal. Fast power control is therefore essential for the uplink to handle the near-far problem. The E-DCH is transmitted with a power offset relative to the power-controlled uplink control channel and by adjusting the maximum allowed power offset, the scheduler can control the E-DCH data rate. This is in contrast to HSDPA, where a (more or less) constant transmission power with rate adaptation is used.
• Soft handover is supported by the E-DCH. Receiving data from a terminal in multiple cells is fundamentally beneficial as it provides diversity, while transmission from multiple cells in case of HSDPA is cumbersome and with questionable benefits as discussed in the previous chapter. Soft handover also implies power control by multiple cells, which is necessary to limit the amount of interference generated in neighbouring cells and to maintain backward compatibility and coexistence with UE not using the E-DCH for data transmission.
• In the downlink, higher-order modulation, which trades power efficiency for bandwidth efficiency, is useful to provide high data rates in some situations, for example when the scheduler has assigned a small number of channelization codes for a transmission but the amount of available transmission power is relatively high. The situation in the uplink is different; there is no need to share channelization codes between users and the channel coding rates are therefore typically lower than for the downlink. Hence, unlike the downlink, higher order modulation is less useful in the uplink macro-cells and therefore not part of the first release of enhanced uplink.

http://3g4g.blogspot.com/search/label/HSPA%20Technical

Huawei E510 USB HSDPA modem & digital TV receiver

by Chris Davies

Huawei, who supply Vodafone UK with their 3G modems, have announced a combination HSDPA/HSUPA USB modem and digital TV receiver. The E510 promises download speeds of up to 7.2Mbps and upload speeds of up to 2Mbps, network depending.

No details about the mobile TV standard Huawei have built into the E510 were discussed, but with such a strong European user-base some are assuming it will at least include DVB-H, which is common in the region.

Neither price nor availability were announced.

[via Everything USB]