Optical/IP Networks

HSDPA to the Rescue?

The global rollout of 3G networks may be experiencing severe delays and concern over long-term potential for revenue success, but such troubles haven’t affected analysts' desire to tout the virtues of so-called “3.5G” technology [ed. note: 3.5G? Oh purlease].

In separate reports released today, both the ARC Group and Analysys stake a claim for High-Speed Downlink Packet Access (HSDPA) technology, a wireless standard designed to act as an upgrade to third-generation networks.

HSDPA is a packet-based data service evolved from -- and backwards compatible with -- earlier Wideband-Code Division Multiple Access (W-CDMA) air interface standards, which offer maximum [ed. translation: once in a blue moon, then] data transfer rates of 2 Mbit/s.

Used with existing W-CDMA networks, HSDPA-compliant handsets and base stations could increase transfer rates to a maximum of 10 Mbit/s, at least in theory. HSPDA is a standardized feature in the 3GPP’s Release 5 specification, introduced in August 2002 (see Release 5 to the 3G Rescue).

Despite limited interest in the technology -- only Japan’s NTT DoCoMo Inc. (NYSE: DCM) has so far publicly admitted to testing HPSDA services (see DoCoMo Cranks Up 3G) -- the fortune tellers over at Arc Group forecast that such 3.5G technologies will reach 9.1 million subscribers by 2008.

“HSDPA is expected to become the most popular of 3.5G technologies due to its support from major vendors like Nokia” (see Nokia Shows Enhanced 3G), the analyst group claims in its latest report -- Life After 3G: New Network Technologies Drive Mobile Growth.

Analysys also adopts a similar viewpoint. Dr. Mark Heath, co-author of The Role and Impact of Emerging Wireless Technologies, believes that HSDPA will provide W-CDMA operators with the capability to rival fixed broadband services. “HSDPA allows W-CDMA to deliver a true wireless broadband experience at a cost-per-megabyte one ninth that of GPRS. This will allow operators to cut prices dramatically.”

Exactly what type of services actually require these high data rates remains unclear, of course.

— Justin Sgrinpham, Senior Editor, Europe, Unstrung

hsdpadude 12/4/2012 | 11:09:54 PM
re: HSDPA to the Rescue? WCDMA delivers 384kb max but downlink power constraints will limit the coverage area. Each 'channel' or bearer is not shared by multiple users.

Using WCDMA, HSDPA concatenates multiple WCDMA channels and allows multiple users to share these channels (maybe GPRS on top of GSM is a good analogy). HSDPA will suffer the same coverage limitations as 802.11 but (when its working in 2006 or 2007) allow the wireless company to offer 802.11 services.
Bugwart 12/4/2012 | 11:09:57 PM
re: HSDPA to the Rescue? Based on the hyberbole surrounding wCDMA (promised 2 mbps, delivers 0.35 mbps) should we expect the hype about HSDPA to be any more accurate?

Since the "D" in HSDPA means downlink, will this technology be asymetrical like GPRS and EDGE?
El Rupester 12/4/2012 | 11:14:06 PM
re: HSDPA to the Rescue? I think its fair to say all the operators are very serious about HSDPA.

DoCoMo are committed to a 2H05 launch, and the Europeans will be fairly soon after.

I know at least one who'll be doing field trials next year.

The economics are not just about faster transfers (although that seems a good enough motivation for .11g, or ADSL2, or any other comms advance, so I'm not sure why Justin is surprised), but about capacity.

A faster link means you can serve more users with more data, and "more users" is the driver.
lrmobile_castro 12/4/2012 | 11:14:11 PM
re: HSDPA to the Rescue? docomo is going to do it sooner as opposed to later don't know about the european carriers. I'd love to hear other views on the matter.
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