High-Speed Uplink Packet Access

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High-Speed Uplink Packet Access (HSUPA) is a 3G mobile telephony protocol in the HSPA family with up-link speeds up to 5.76 Mbit/s.

The specifications for HSUPA are included in Universal Mobile Telecommunications System Release 6 standard published by 3GPP.

Contents

[edit] Technology

HSUPA is expected to use an uplink enhanced dedicated channel (E-DCH) on which it will employ link adaptation methods similar to those employed by HSDPA, namely:

Similarly to HSDPA, HSUPA uses a packet scheduler, but it operates on a request-grant principle where the UEs request a permission to send data and the scheduler decides when and how many UEs will be allowed to do so. A request for transmission contains data about the state of the transmission buffer and the queue at the UE and its available power margin.

In addition to this scheduled mode of transmission the standards also allows a self-initiated transmission mode from the UEs, denoted non-scheduled. The non-scheduled mode can, for example, be used for VoIP services for which even the reduced TTI and the Node-B based scheduler will not be able to provide the very short delay time and constant bandwidth required.

Each MAC-d flow (i.e. QoS flow) is configured to use either scheduled or non-scheduled modes; the UE adjusts the data rate for scheduled and non-scheduled flows independently. The maximum data rate of each non-scheduled flow is configured at call setup, and typically not changed frequently. The power used by the scheduled flows is controlled dynamically by the Node-B through absolute grant (consisting of an actual value) and relative grant (consisting of a single up/down bit) messages.

[edit] Versions

The following table gives uplink speeds for the different categories of HSUPA

HSUPA Category Max Uplink Speed
Category 1 0.73 Mbps
Category 2 1.46 Mbps
Category 3 1.46 Mbps
Category 4 2.93 Mbps
Category 5 2.00 Mbps
Category 6 5.76 Mbps

[edit] Roadmap

After HSUPA the 3GPP is working on further advancing transfer rates. The HSOPA will provide up to 100 Mbit/s for downlink and 50 Mbit/s for uplink.

[edit] Deployment

Australia

  • Telstra is going to introduce HSUPA in the first half of 2007. It will initially operate at 2.0Mbit upload speed.[1]

Austria

Italy

Israel

  • Pelephone is planning to introduce HSUPA in 2008.
  • cellcom has introduced Hsupa from the 7.3.07 to 80% coverage of the country and in the next six month the coverage will grow to 92%.

Slovenia

South Africa

  • Vodacom is planning to introduce HSUPA in 2007.
  • MTN is planning to introduce HSUPA in 2007.

South Korea

  • KTF is planning to introduce HSUPA in 2007.

Switzerland

United States

[edit] Devices

Some triband (850/1900/2100 MHz) HSUPA devices are already available:

[edit] References

This article or section does not adequately cite its references or sources.
Please help improve this article by adding citations to reliable sources. (help, get involved!)
Any material not supported by sources may be challenged and removed at any time. This article has been tagged since September 2006.
HSDPA/HSUPA for UMTS: High Speed Radio Access for Mobile Communications 
By Harri Holma and Antti Toskala
ISBN: 0470018844

[edit] See also

[edit] External links

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