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Rohde & Schwarz unveils universal communication tester

Posted: 27 Mar 2006     Print Version  Bookmark and Share

Keywords:R&S CMU300  universal communication tester  HSDPA  high-speed downlink packet access  Rohde & Schwarz 

Rohde & Schwarz introduced the R&S CMU300 universal communication tester, which checks settings for high-speed downlink packet access (HSDPA) at Node Bs (UMTS base stations) and performs measurements on the physical HSDPA channels. The R&S CMU-K72 HSDPA monitoring option allows you to measure data throughput. The measurements serve as a basis for analyzing and optimizing algorithms for resource assignment.

According to Rohde & Schwarz, the introduction of HSDPA confronts network operators with the challenge of providing complete availability of services by means of intelligent network planning. They must decide which parts of the existing UMTS network to upgrade first with HSDPA because future HSDPA users will share resources with other UMTS users and must be adequately covered. To be able to selectively assign a particular network capacity to HSDPA subscribers, network operators must adapt the HSDPA parameters on the air interface as necessary.

With the R&S CMU-K72 HSDPA monitoring option, analyzing the data flow is said to be possible on the high speed shared control channel (HS-SCCH). Node B uses this signalling channel in the downlink to tell the UMTS mobile phone (i.e. the user equipment) when the next data packet will be assigned. In the uplink, the UE sends a return signal indicating whether all of the data arrived.

The product is said to decrypt the complete data traffic—including the messages as to when, and in which quantity data was transmitted and correctly received. This allows the user to see which volume of useful data was actually received by the subscriber. On the basis of these data throughput measurements, network operators can, for example, set up selected user groups to be granted priority with respect to the assignment of resources.

Equipped with the R&S CMU-K72 option, the R&S CMU300 can simultaneously analyse four HS-SCCHs with up to 128 UEs altogether, said the company. In addition, the option features a UE-ID scan function. The network dynamically assigns an ID to mobile phones. Before the actual HS-SCCH analysis starts, the scan function locates the active UEs. Besides the functions, the R&S CMU300 also acts as a platform for scenario and system tests, allowing physical HSDPA transmission parameters to be checked.

The new R&S CMU-K72 option is now available from Rohde & Schwarz.

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