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First commercial HSUPA tester?

Posted: 18 Nov 2005     Print Version  Bookmark and Share

Test equipment maker Aeroflex announced that it has developed the world's first commercially available test system for high speed uplink packet access (HSUPA). Aeroflex's new product is claimed to provide full support for 3GPP Release 6 HSUPA wireless. The HSUPA capability is an enhancement to Aeroflex's existing TM500 Test Mobile system. Aeroflex claims its TM500 delivers HSUPA/HSDPA (high speed downlink packet access) functions long before commercial handsets become available.

Why is this significant? Well, HSUPA presents numerous challenges to infrastructure developers. In addition to supporting new features to enable efficient reception and decoding of uplink data, the Node B is responsible for managing the spectral resource.

A scheduling algorithm

The Node B controls the uplink loading by means of a scheduling algorithm that allocates grants to each mobile terminal, indicating the amount of data that it is permitted to transmit at any time. The addition of soft handover support in HSUPA serves to improve uplink efficiency but increases scheduling complexity. That's where the HSUPA capability comes in.

Aeroflex has already achieved HSUPA calls between the TM500 and 3G infrastructure equipment at data rates in excess of 700kbps, and the company has demonstrated rates up to 5.76Mbps using commercial test equipment. HSDPA is already providing a major improvement to the downlink capacity of the latest 3G networks.

Uplink test

For its part, HSUPA is expected to deliver a similarly important enhancement to the uplink through the introduction of higher throughputs, reduced latency and higher spectral efficiency. By offering data rates up to 5.76Mbps and reduced packet latency in the uplink, HSUPA paves the way for a range of wireless broadband data services including video, gaming, VoIP (voice over Internet Protocol) and instant messaging.

The TM500 HSUPA test system implementation also delivers full support of 3GPP Enhanced Uplink technology, enabling detailed operation, testing and analysis of complex packet-based services and applications.

Uplink and downlink data services can be configured and run simultaneously on the TM500 at the maximum HSUPA and HSDPA rates of 5.76Mbps and 13.97Mbps, respectively.

Structured development

In addition, structured development and test programs are essential for the verification, validation and optimization of HSUPA infrastructure. The TM500 HSUPA addresses these problems by means of test modes and logging options. These include scripted configuration, test sequences and measurement capture. According to the company, these features permit a detailed and incremental analysis of functions at Layer 1, Layer 2 and higher layers. Test procedures can also be automated for use in regression testing.

Additional test features can also assist in Node B and RNC (radio network controller) development and regression test. These include Aeroflex's new Data Service Generator tool. It supports the creation of realistic usage profiles of packet-based services, including voice, Web browsing and gaming applications.

The TM500 HSUPA Layer 1/Layer 2 option is available for immediate delivery as a software upgrade. The 3GPP Release 6 Higher Layer option will be available in the first quarter of 2006.

- Alex Mendelsohn


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