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| AP-4000 « Back to the product page The AP-4000 was the first in the AP series of products. This WCDMA Air Protocol Analyzer began as an immediate success among UE and BTS vendors in Japan and Europe. It is currently being used globally by developers, network operators and equipment manufacturers that don’t require the HSDPA and GSM/WCDMA InterRAT capabilities of its successor, the AP-6000 The AP-4000 is the ideal tool to tests the air interface between User Equipment (UE) and Base Transceiver Stations (BTS) in 3GPP networks. The AP-4000 allows developers, researchers and inter operability test engineers to perform in-depth analysis of all three layers of the Uu protocol stack with a completely reliable vendor independent tool. Hardware and software development time can be greatly reduced by using the AP-4000. The AP-4000 can also assist in reducing the release time to market of new products. In addition, the analysis and location of problems during Inter Operability Testing (IOT) is made easier. Key Features
Vendor Independent A powerful, universal validation tool The APA monitors and records the UU air interface with its own internal RF units. This has the advantage of not requiring a wired connection to the UE, BTS or any element of the UMTS/WCDMA network to be tested. As a result, it is a valuable and independent tool to test any piece of equipment that complies with the 3GPP’s Uu specifications. Inter-Operability Testing An easy way to troubleshoot Today different vendors of UE and Node B equipment coexist in most networks around the world. Performing comprehensive IOT is critical for these scenarios especially when combining the various types of equipment. This ensures a smooth operation and system performance. The powerful analysis capabilities of the APA makes it an excellent tool for troubleshooting problems during UE registrations, paging, handovers, etc. Main Functions
Display of Information - User friendly interface and detailed data The APA provides real time information of channel activity and RRC messages as well as detailed off-line information from Layer 1 to Layer 3 allowing the engineer to concentrate on the desired area of interest and thoroughly analyze the obtained data. Real Time Display During a Take, the APA displays the current data being received on each physical channel and RRC messages. Also, it shows the SCH profile and BTSs status. In this view it is easy to see at a glance the activity of the different channels. The engineer can look for the correct sequence of PRACH, AICH and RRCs during a call setup, the status of CRCs, Hand Over sequences and more. Off-line Display After a Take is finished, the APA provides all the required information for a deep analysis on 8 tabbed windows:
Layer 1 Graphic View Captured physical channel data is displayed in a time line. Transport Channel data and Physical Layer are shown. Layer 1 Data Dump The received data is displayed by channel along with its timestamp. It is possible to filter the different channels. BCH Analysis The System Information Block (SIB) transmitted over the Broadcast Channel (BCH) is displayed and shown also in Abstract Syntax Notation (ASN.1) for a easier reading. C-Plane RRC/NAS Analysis In this screen the following information about the Control Plane can be found:
U-Plane Analysis In this screen the following information about the User plane can be found:
Online Message All RRC messages are shown with its timestamp, direction (UL or DL), Sequence Frame number (SFN) C-Plane & U-Plane Analysis windows These windows are used to analyze the Layer 2 RLC. Each one shows the sent data packets, its ACK, NACK, the delay time, retransmitted messages and estimation on the possible cause for the retransmission. Also, statistical information is shown on the following values, both in the UL and DL:
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