FI118713B - Arrangement, procedure and computer program for determining the quality of a packet switched cellular radio network - Google Patents

Description

118713 An Arrangement, Method, and Computer Program for Determining Quality of Service in a Packet Switched Cellular Radio Network

Area

The invention relates to an arrangement for determining the quality of service of a packet switched cellular radio network, a method of determining the quality of service of a packet switched cellular radio network, and a computer program encoding computer program instructions for executing a computer process determining the quality of service of a packet switched cellular radio network.

BACKGROUND 10 The quality of service (QoS) mechanisms of a cellular radio network are designed to ensure that the user obtains the quality of service (QoS) he / she expects and maximizes network resources (radio interface, transmission devices, network elements).

Expectations of service quality are different in different applications. With a voice connection, the quality of the service must be such that there is no excessive delay in the transmission of speech and no parts of the speech are lost during transmission. The quality expectations for a text message are different, it is enough that the whole message arrives within a reasonable time.

On the other hand, the operator wants to ensure that the network resources are: * · *: 20 utilized to the maximum. This could be done in such a way that all- ···. the structure would be buffered and sent to the network when resources were available.

This is not possible, as the quality of some services could be reduced.

For these different service quality expectations, packet switched • · ... service quality mechanisms have been developed for locked radio networks to ensure maximum utilization of network resources without compromising service quality. A different service class is used for different applications, which determines what kind of quality and latency the application has. Delay classes include: • ·: *** conference (audio and / or video), audio and / or video streaming,: ... · interactive (eg web browsing or online games) and background running (eg background files).

However, a packet switched cellular radio network is so complex. There are many reasons why quality of service may decline. There are various measuring instruments for measuring quality of service, but none of them provide a complete solution for measuring the quality of service and the causes of quality degradation.

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US 6,218,544 describes a method and arrangement for determining the quality of a radio network. The method measures the quality of the radio signal received by the telephone and locates the telephone with the satellite positioning system and transmits the information to the network management system for connection to the radio signal measured by the telephone 5 of the network to thereby determine the quality of the radio network.

US 2003,000,745 discloses a method and apparatus for measuring the actual quality of a call over an IP (Internet Protocol) network.

WO 02/39673 discloses a method for measuring quality of service on a network. It describes how to measure actual quality.

EP 1 267 584 describes a method for testing a packet switched cellular radio network. The method monitors intra-cellular traffic in the cellular network and draws conclusions on the quality of service based on a comparison between agreed and measured quality of service. However, the publication does not describe how to measure service quality. Given the complexity of the structure of cellular radio networks and the coexistence of different technologies and generations within the same cellular radio network, this is no trivial task.

It is an object of the invention to provide an improved arrangement, method and computer program for determining the quality of service in a packet switched cellular radio network.

One aspect of the invention provides an arrangement for determining the quality of service of a packet switched 25 cellular radio network comprising: • at least one measurement means connected to a cellular radio network, such as a measurement - * "* sensor configured to capture intracellular traffic and data transducers. such as the analyzer ϊ * configured to separate the intercepted cellular network traffic from the service provided to the subscriber terminal, both the requested service level and the agreed service level, the analyzer is further configured to separate the intercepted cellular radio network traffic from more than one cellular network, service messages and configuration messages used by the service to implement cellular radio communications within the cellular network. further configured to determine the actual service level of the service by examining correlations and / or mapping between service parameters contained in the messages separated from the various interfaces of the cellular radio network, and determining the quality of service by comparing the implemented service level to the requested and agreed service level.

One aspect of the invention provides a method for determining the quality of service in a packet switched cellular radio network, the method comprising: capturing intra-cellular radio network traffic; distinguishing between the captured cellular radio network traffic and the requested service level and the agreed service level of the service provided to the subscriber terminal; and separating from the intercepted cellular radio network internal traffic, more than one internal cellular radio network interface, both service-executing service messages and configuration-utilizing cellular radio communication configuration messages used by the service. The method further comprises: determining the actual service level of the service by examining correlations and / or mapping between service parameters contained in messages separated from different interfaces of the cellular radio network; and determining the quality of service by comparing the actual service level with the requested and agreed service level.

In one aspect of the invention, there is provided a computer program for determining the quality of service in a packet-switched 20 cellular cellular radio network which encodes computer program instructions for executing a packet-switched cellular network quality service computer process, the computer process running on a computer. internal traffic; separating from the hijacked cellular intranet *: * ·: 25 the service provided to the subscriber terminal, both the requested service ** and the service level and the agreed service level; and extracting the hijacked cellular network • ·. ***. internal traffic, from more than one internal interface of the cellular radio network, both service messages executing the service and configuration messages implementing the internal communication links of the cellular network • · * ... 30. The computer process further comprises: determining the actual service level of the service by examining correlations and / or mapping between the service parameters contained in the message *: * · segregated from different interfaces of the cellular radio network; and determining the quality of service by comparing what has been achieved. service level to the requested and agreed service level.

The invention provides several advantages. By determining the agreed and accomplished quality of service, conclusions can be drawn about the performance of the cellular radio network and the adequacy of its capacity. Thus, the invention provides reliable information about the actual operation of the network. The quality of service the user receives can be optimized as expected. The operator can also optimize the amount of network resources so that they are in maximum use, i.e. there are not too many resources but not too few. A common problem with the aforementioned publications is that they do not describe how agreed, promised and realized quality of service in a packet switched cellular radio network should be measured, how radio network quality measurement should be combined with quality of service measurement, and they do not describe the use of transaction times. Also, the prior art cannot measure the quality of the Transport network end-to-end and examine where the critical points can be found. The invention also provides improvements to these problems.

List of figures

The invention will now be described in greater detail in connection with preferred embodiments, with reference to the accompanying drawings, in which Figures 1A and 1B are simplified block diagrams illustrating an arrangement for determining the quality of service in a packet switched cellular radio network; Figure 2 shows an embodiment of the arrangement of Figure 1A; Figure 3 shows the structure of the analyzer; Figure 4 illustrates a network interface structure for an analyzer; Fig. 5 shows an embodiment of the arrangement of Fig. 1B; Fig. 6 shows the structure of a test terminal; Figure 7 illustrates a representation of the quality of service; ····· Figure 8 illustrates the representation of service classes; FIG. 9 is a signal sequence diagram illustrating a service wide range. dun agreement and implementation of the service; and FIG. 10 is a flowchart illustrating a method for determining the quality of service in a packet switched cellular radio network.

• # • ··

DESCRIPTION OF EMBODIMENTS Referring to Figure 1A, an arrangement for determining the quality of service of a packet switched cellular radio network 100 is described. Cellular radio network 100 includes various network elements 102, 104, 106. Modern cellular radio networks are generally based on open standards, so that a single cellular radio network may include network elements designed and manufactured by more than one manufacturer. An interface 114 can then be defined between the network elements: an interface 114 is defined between the network elements 102, 104 and the interface 116 is defined between the network elements 104, 106. The standard subscriber terminals 110 may be in radio communication with the cellular radio network 100.

The arrangement includes a measuring sensor 122, 124 coupled to a cellular radio network 100 configured to capture internal traffic in the cellular radio network 100. The arrangement further comprises an analyzer 120 coupled to a measuring sensor 122,124 configured to distinguish from the captured cellular network 100 traffic the balloon provision provided to the subscriber terminal 110, both the requested service level and the agreed service level.

The analyzer 120 is further configured to distinguish between the captured cellular radio network 100's internal traffic, more than one internal cellular network 100's interface 114,116, both service-executing service messages and service-used cellular radio-network communication configuration messages 15. Analyzer 120 is configured to determine the actual service level of the service by examining correlations and / or mapping between service parameters contained in messages separated from different interfaces 114, 116 of cellular radio network 100. Further, the analyzer 120 is configured to determine the quality of service by comparing the actual service level with the requested and agreed service level.

Figure 1B illustrates an alternative embodiment of the arrangement of Figure 1A. In the embodiment of Fig. 1B, only one measurement sensor 122 is required instead of two, since the connections between the network elements 102, 104, 106 are *: **: 25 implemented by the communication network 130. The communication network 130 may then have a point, e.g. -fiber, or data transfer;; ***; a network device, such as a switch, bridge, or router, that transmits all traffic that you want to capture. In this case, it is sufficient that one measuring sensor 122: · is connected to the respective point of the communication network 130. Thus, the measuring transducer 122 may, at a particular location in the cellular radio network 100, intercept its internal traffic * ·; ** by capturing only one internal interface traffic at that location, or by capturing more than one internal interface at that location: · *: In addition, it should be noted that the same interface can pass through a single point on several different tracks, either by different users or by the same user.

• · 6 118713 The arrangement can be used to measure the quality of service in various packet switched cellular networks. For example, in the 2.5 generation mobile network system and the third generation mobile network system. One example of a 2.5 generation system is 5 GPRS (General Packet Radio Service) or EGPRS (Enhanced GPRS) and a third generation UMTS (Universal Mobile Telecommunications System).

Figure 2 illustrates how the arrangement can be used to determine the quality of service in a third generation packet switched cellular radio network. Figure 2 is a simplified block diagram illustrating only the most important network elements. The structure and function of the network elements are not described as they are generally known. Further information on cellular radio networks can be found in the literature, for example, Harri Holma, Antti Toskala, which is incorporated herein by reference: WCDMA for UMTS, John Wiley & Sons, ISBN: 15 0470844671.

The packet switched connection 112 to the cellular radio network 100 may be established by the user equipment 110. The connection 112 may also be established by using the user equipment 110 as a modem to which a computer (e.g. a laptop) is connected as a terminal. In this application, the terms space-20 terminal and user terminal are used interchangeably with each other. For example, the UMTS standard defines a User Equipment (UE) as: • consisting of a Mobile Equipment (ME) and a UMTS Subscriber Identity Module (USIM): .v The User Equipment 110 connects to a cellular radio base station 100 * : * ·: 25 (Base Station / Base Transceiver Station / Node B) 202 on radio 112.

The base station 202 switches the incoming traffic over the lub communication interface 220 to radio link 112 and participates in radio communication management. From base station 202 onwards, traffic generally passes through a wired connection. From the base station 202 packet connection ·. ys passes to the Radio Network Controller (RNC) 204. The Radio Network Controller 204 retrieves radio resources and serves as a Service Access Point **; · * towards the Core Network (CN) for all Radio Ac- * "'· cess Network (RAN) services.

*: · *: According to the UMTS standard, a cellular radio network is made up of a backbone, · '. network and radio access network. The radio access network consists of radio network subsystems (RNS), which in turn consist of radio network controllers and base stations.

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From the radio network controller 204, the packet connection passes through the luPS interface 222 to the Serving GPRS Support Node (SGSN) 206. The operating node 206 manages the subscriber identity and mobility management and participates in the quality control of the packet connection.

From the operating node 206, the packet connection passes through the Gn interface 224 to the Gateway GPRS Support Node (GGSN) 208, which routes the connection to other networks, such as the Internet. In the embodiment of Figure 2, gateway node 208 communicates with server 210 through Gi interface 226. Server 210 implements the service desired by user 10 of user device 126. Server 210 can be, for example, a WWW (World Wide Web) server or an FTP (File Transfer Protocol) server. The gateway node 208 participates in managing the quality of packet connection and manages subscriber IP (Internet Protocol) addresses. The Home Location Register (HLR, not depicted) maintains subscriber information and a subscriber's service quality profile.

15 When initiating a packet switched connection, the user equipment 110 requests a service level from the network 100. The network 100 processes the request and authorizes a service level user. During the connection, there is a service level that may be different from what was promised. The arrangement described can measure the service level requested, promised and realized, and thus view the operation of the network 100. In some embodiments, it also provides measured information about radio network operation, network congestion, and user equipment features. Using this information, the ϊ · * operator can optimize network performance. Some of these measurements may be performed «« «by a custom-built user equipment (test terminal) described below.

*: **: 25 Measuring transducers 122, 124, 212, 214 provide additional information about the connections: ***: operation in different parts of the network 100 and can also perform measurements in the network: ***. 100 different parts, so any malfunctioning part can be localized. Conclusions can be automated by combining thresholds with measurements based on agreed quality of service. In addition, by combining the measurement results of all connections, the arrangement can, for example, in a huge way, in Figure 7: **: * ', on a single user interface screen 700, determine whether the quality of service *** "is okay. as described below, and screen 700 indicates that transaction 1 is associated with an IP address ·]; 10.10.10.1 and the quality of service in question is not correct. From this screen 700 · ·· '35 users can advance 7, when examining the cause of the degradation of service.

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Figure 2 illustrated how the embodiment of Figure 1A can be applied to a third generation cellular radio network. Similarly, Figure 5 illustrates how the embodiment of Figure 1B can be applied to a third generation cellular radio network. The connections between the network elements 202, 204, 206, 208, 210 are implemented over a communication network 500, for example an intranet. In this case, it is not necessary to have more than one measuring sensor 122 connected to the intranet 500. However, in the example of Figure 5, another measuring sensor 124 is also used which is connected to the Internet 502 which connects the gateway node 208 and the server 210.

The purpose of QoS mechanisms is to ensure that the user receives the service he or she subscribes to, but also to ensure optimum use of the equipment of the operator providing the services. The operation of the QoS mechanisms is illustrated in Figure 9.

At the beginning of the application connection, the service level is requested by the PDP Context Request message 900. Different applications may have different needs, whereby the subscriber-15 terminal may open more PDP contexts with different QoS attributes. The PDP Context Request message 900 goes to the operating node, which, together with the home location register and the gateway node, handles the processing of QoS parameters. This discussion utilizes the concept of "QoS Policy" 902, defined by 3GPP (3rd Generation Partnership Project), which defines how service-level Transport-level 920, 922 parameters are set based on QoS attributes. QoS Policy Implementation and their Trans- *. : The port parameters are device-specific.

The RAB Assignment Request / Response messages 904, 910 set: Y: Radio Access Transport parameters 918 for the connection between the radio network controller and the operating network. The RB Setup / Acknowledge messages 906, 908 set the Radio Access Transport parameters 916 to the radio network controller and to the ···. to the kiosk connection. In one embodiment, the analyzer 120 is configured to • distinguish from the Radio Bearer settings of the extracted messages the parameters determining the quality of the internal communication links, e.g., from the 904, 906, 908, 910 messages described above.

The IP-Transport connections 920, 922 can use the DiffServ standard as a QoS mechanism to handle the prioritization between different connections. Diff- ·: ··; In the Serv standard, prioritization is based on the Diff / in the frame of the IP message. Serv Code Point (DSCP) field. Another QoS standard related to IP Transport ** * i 35 is MPLS, where packet priority routing is based on the MPLS ID that is added / removed at the beginning of the message before the IP frame 9 118713 on the edge nodes of the MPLS routing network. The third QoS standard associated with an IP-Transport connection is RSVP, in which packet priority-based routing is based on a resource allocation protocol before the connection is opened. There are many transport-level QoS mechanisms and they are constantly evolving. What they have in common is that they are accompanied by protocol messages, which can be measured by measuring the quality of operation of the mechanisms.

Once the Transport parameters have been set, a PDP Context Accept message 912 is sent to the terminal and the actual transfer of user information, Actual User Plane IP 914, can begin. According to the terminology used previously, the requested service level can be extracted from the message 900 and the agreed service level can be extracted from the message 912. According to the terminology used previously, messages 904, 906, 908, 910, 916, 918, 920, 922 are configuration messages and message 914 is a service message.

In one embodiment, the analyzer 120 is configured to distinguish between a PDP (Packet Data Procotol Context) extracted message quality of service message, e.g., from message 912, and parameters determining the IP (Internet Protocol) quality of service messages implementing the service, e.g., from messages 914, 916, 918, 920, 922. In one embodiment, the quality of service profile comprises at least one of the following attributes: Delay Class, Reliability Class, Peak Throughput, Precedence Class, φ · · : V Mean Meanput, Traffic Class, Delivery Order, Distribution of Invalid Service Data Units: Y: (Delivery of Erroneous Service Data Unit), Maximum Service Data Size ·: ··· 25 (Maximum Service Data) Unit Size), the Maximum Bit Rate for Uplink ), the maximum bit rate for the downlink (Maxi [·· *, mum Bit Rate for Downlink), Residual Bit Error Rate, • «Service Data Unit Error Ratio, Transfer Delay, Traffic Processing Priority (Traffic Handling Priority), guaranteed · · 30 bit rate for uplink (Guaranteed Bit Rate for Uplink), guaranteed bit rate for uplink (Guaranteed Bit Rate for Downlink). 3GPP ·: ··: TS 24.008 specifies a QoS information element containing said attributes.

, *. In one embodiment, the parameters defining the quality of the IP traffic of the service messages (Internet) are at least one of: DiffServ (Differentiated Service), IntServ (Integrated Service), RSVP (Reservation Protocol), MPLS (Multi-Protocol Label Switching), VOMPLS (Voice Over MPLS). For more information on RSVP, MPLS, and VOMPLS, see, for example, IETF (The Internet Engineering Task Force) specifications: - Braden et al., "Resource Reservation Protocol (RSVP)", RFC 5 2205, September 1997, - Blake et ali: "Architecture for Differentiated Services", RFC 2475, December 1998, - Rosen et al: "MPLS Architecture", RFC 3031, January 2001, - A. Kankkunen et al: "VoIP over MPLS Framework", IETF Internet 10 draft ( work in progress: draft-Kankkunen-vompls-fw-01 .txt), January 2000.

In one embodiment, the analyzer 120 is further configured to perform correlation of messages separated from different interfaces 114, 116 of cellular radio network 100 based on the addresses contained in the separated messages. In one embodiment, the address comprises an IP (Internet Protocol) -15 address. Based on the IP address of the terminal, three things can be combined: active PDP (Packet Data Protocol) contexts and QoS parameters agreed upon therein, Transport allocations and their parameters allocated to the connections, and the actual end-user IP connections and traffic. When these three things are measured simultaneously, it becomes clear what kind of 20 service the terminal has agreed on, how the Transport mechanisms of the network work to accomplish this, and how the service is actually implemented at the user traffic level. This information can be used to measure how two of Qo $'s main goals are: [] *: Fulfillment: the user gets the service they subscribe to and the service provider: V: The devices are optimally used.

In the arrangement, measuring sensors 122, 124, 212, 214 are connected to different points in the cellular radio network 100, in the embodiment of Fig. 2, different network elements [·. *. en 202, 204, 206, 208, 210 interfaces 220, 222, 224, 226, generally • · * "at least two different interfaces on the same network 100. Between the network elements" 202, 204, 206, 208, 210, are used in different interfaces 220, 222, 224, 226 • · 30 different connection modes, the lub and lu interfaces can be physically, for example! ...: ATM / STM1 (Asynchronous Transfer Mode / Synchronous Transport Module 1) - ·; ··· fiber optic (multi-mode or monofilament fiber) or ATM / E1 (European Digital ....: Signal 1) coaxial cables The Gn and Gi interfaces can be, for example, Ethernet / LAN (Local Area Network) interfaces.

: · * · 35 When connecting the probe 122 to the fiber optic, the fiber optic input to the network element 202/204 can be connected to a splitter (e.g. Smart Light 11 118713

Technology ™ SFC2 Single Mode Fiber Coupler) to the network element 202/204 and the measurement sensor 122. The splitter divides the incoming signal into two branches, for example 90% of the incoming signal power and the second branch, for example 10% of the incoming signal power. The 5 10% branch is then connected to the measuring sensor 122 and the 90% branch to the network element 202/204.

By connecting the measurement transducer 124 to the physical E1 interface, the coaxial cable to the network element 204/206 can be connected via a branch to both the network element 204/206 and the 10 impedance input transducer 124.

The measurement transducer 212 can be connected to the Ethemet interface, generally through a repeater, to provide the transducer 212 with the same traffic as the local network between network elements 206, 208. When the switch is used for connection, the measuring sensor 212 can be connected to the switch monitoring port 15 where all traffic to the switch is copied.

Capturing traffic within cellular radio network 100 may also be accomplished by network elements 102,104,106 intercepting messages, timestamping them and transmitting them to the analyzer 120 via the transmission network. For example, the management network 20 of the network elements 102, 104, 106 or the network 100 to be analyzed may be used as the transmission network.

Next, with reference to Fig. 3, the construction of analyzer 120 will be described. Analyzer 120 may also be referred to as a protocol analyzer.

Analyzer 120 may be a personal computer with a Windows® operating system: V: a personal computer connected to network interfaces 114, 116 via network cards 318, 318 and measuring sensors *: * ··· 25 den 122, 124. For example, an Ethernet network interface card may be used. 3Com®: OfficeConnect® 10/100 NIC-. ···. network card. The architecture and implementation of an Ethernet network interface card are disclosed, for example, in U.S. Patent No. 6,393,457. ATM -: s can be used with NetHawk ™ Plc N3 or D3 network card. E1- *.,] * 30 can be used with NetHawk ™ Plc's N2 or N AP network interface card.

'··· * Network card 316, 318 connects via device driver 314 to analyzer *: ··: 120 to kernel 302, which manages network card 316, 318 and captures custom traffic: · · · · · · · · · · · . segregation and control of message processing. After receiving a message from the network card 316, 318, the device driver 314 timestamps it and stores it in the history buffer 312. The history buffer 312 organizes the messages with the time stamps 12 118713 and stores them in a ring buffer for retrieval by the core 302. The history buffer 312 also provides for the storage of messages in the file if desired. It is also possible to save the contents of the history buffer 312 to a file, for example, to store messages related to abnormal behavior. History buffer 312 may be stored in central memory for rapid processing.

The core 302 decodes the captured messages with the protocol-based decoding components 306. The decoding prints the messages for display in the user interface 300. The decoding also provides the decoded messages to the components 304, 308, 310 of interest.

Radio network connections are often encrypted. In the third generation cellular radio network, the Kasumi f8 algorithm can be used for encryption. The hardware required for kazumi f8 encryption is described in US 2002,0,181,709, which is incorporated herein by reference. The analyzer 120 may include a decryption component 154 304 which captures the encryption settings and encryption keys from the lub and lu interfaces and thereby decrypts them before decoding.

The user interface 300 displays the analysis results and controls the user interface for the analyzer 120. Through the user interface 300, the storage of the captured and extracted messages on the storage medium can be set up. The messages can later be read from the memory medium and the quality of service measurement performed again as if the analyzer 120 is connected to the correct network · [[[100] 100] The service quality measurement results can also be provided through the user interface 300: V: stored on the storage medium for later review. · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · · ·

The user interface 300 may also include a hash interface through which! ·· 'measurement results can be read to other software and measurement can be controlled.

For the implementation of hashing, a commonly known hashing model can be used, for example, CORBA (Common Object Request Broker Architecture) • ·: (> 7 30 or COM (Component Object Model)). U.S. Patent No. 6,233,731.

·: ··· Block 308 maintains a table of active calls and manages the connection of ··· .: calls to calls. Block 308 may also measure call-specific. *, Transaction measurements based on time stamps. Results can be displayed in * · * · 35 user interfaces 300.

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Block 310 performs quality of service measurement, the results can be displayed in user interface 300.

Any personal computer or desktop computer, such as the Fujitsu-Siemens® Life-5 book E series, can be used as a personal computer. The network interface card 316, 318 can be connected to a PCI (Peripheral Component Interface Connect) slot or PC card slot on a personal computer, depending on the type of network interface card 316, 318. Analyzer 120 may thus be a personal computer with customized Windows® software comprising the modules 300, 302, 304, 306, 308, 310, 1031, 314, 316, 318 described. Some of the modules may be implemented as software, e.g. modules 302, 304, 306, 308, 310. Some modules, on the other hand, are software and hardware assemblies, for example, modules 300, 312, 314, 316, 318.

Analyzer 120 may run a computer program encoding computer program instructions 15 to perform a computer process determining the quality of service in a packet switched cellular radio network. This computer process comprises: separating from the intercepted cellular radio network internal traffic, more than one cellular radio network internal interface, both service-executing service messages and service-used configuration cellular-internal data communication configuration messages; determining the actual service level of the service by examining the correlations and / or mapping between the service parameters contained in the messages separated from the various interfaces i V of the cellular radio network; and determining the quality of service by comparing • 'V ·' with the actual service level to the requested and agreed service level. Data ·: ··· 25 machine programs can be stored on a computer program distribution medium. Computer · * · *; The program distribution tool can be read by the analyzer and encoded by the computer software. jel ma commands for performing a computer process determining the quality of service in a packet switched cellular radio network. The distribution medium may be any known means for distributing a computer program from the manufacturer / vendor to the end user. The distribution means may be, for example, analyzer 120 readable media, oh **: ** program storage media, storage media, analyzer 120 readable memory, analyzer 120 readable software distribution kit, analyzer 120 ·: ·: read signal, analyzer 120 read communication signal, and analyzer. a companion software package readable by a screw 120.

* *; The broader measurement system may be composed of a plurality of analyzers 120, one of which analyzer 120 controls the assembly. Analyzers 120 14 118713 can be connected to one another via a local network. For the implementation of the hash, one can use a well-known hash model (for example, CORBA or COM). In this case, only the controlling analyzer 120 has a user interface 300 and all functions are controlled through it. The controlling analyzer 120 receives the measurement-5 results from the sub-analyzers and aggregates them together. In one embodiment, the analyzer 120 includes a www (World-Wide Web) server through which the analyzer 120 can be controlled and measurement results read through a browser interface. This allows analyzer 120 to be used on any browser-containing device.

Figure 4 illustrates an embodiment of network cards 316, 318. It should be noted that Figure 4 only illustrates examples. Different interfaces can be used for different interfaces available from many different manufacturers. The NetHawk ™ N3 / D3 illustrated in Figure 4 is an ATM / STM1 network interface card. The N3 has two 155Mbit / s ATM interfaces on one PC Card-15 compliant interface card. The D3 has two 155Mbit / s ATM interfaces in one PCI compliant expansion card. Figure 4 shows the coarse-level structure of the card 316.

In normal operation, the card 316 is directed to receive some ATM VPI / VCI (Virtual Path Identifier / Virtual Channel Identifier) addresses from selected line interfaces 400, 402 from which received ATM cells are copied to computer memory for further processing by device driver 314. Cells can be copied to ϊ V computer memory using DMA (Direct Memory Access) transfer. The card 316 can operate in the bus control mode.

· *. · '. · * Device driver 314 calculates, based on the cell's time stamp and time, the reception time of 25: 25 cells used for cell sorting and analysis. Kellonai-

· '· * Can be taken either from the computer's real-time clock or from a more accurate GPS

• ·. · * ·. (Global Positioning System) watch. The device driver 314 controls the operation of the card 316 through the registers of the MAC circuit 408.

The line adapter 400, 402 can be, for example, a Hewlett Packard®, 730 HFCT-5905E, which has a 155 megabits / second data rate and a 1300 * ·; · * nanometer wavelength single mode optical signal receiver and transmits *: · *. The line adapter 400, 402 converts the optical signal into electrical form.

·; ··: The ATM signal can be switched from the receiver to the ATM-PHY circuit 404, 406. via the transmitter, whereupon the card 316 acts as an amplifier. Another possibility '* "35 is to split the ATM line with a branch to N3 / D3 and the network element to be monitored.

15 118713 The ATM-PHY circuit may be of the Rockwell® RS8250 type. It is capable of receiving and transmitting ATM cells at 155 megabits / second. It can generate a Header Error Control (HEC) for transmitted ATM cells and check the HEC for incoming ATM cells. The receiver can be programmed to receive only a specific ATM address range. This can be used to filter the traffic to be captured to reduce the load.

The network card 316 comprises a MAC circuit 408 that processes the received cells from the line and sends the cells to the line. MAC circuit 408 can be implemented with an FPGA circuit (e.g., Altera ™ EPF10K100). The memory 410 (e.g., PROM (Programmable Read-Only Memo) type memory) coupled to the MAC chip 10 408 contains a program of the MAC chip 408 which is read at startup. The network card 316 also comprises a bus adapter 416 which fits the card into the PC card bus or PCI bus of the computer. The bus adapter 416 can be implemented with an FPGA circuit (e.g. Altera ™ Flex EPF10K30). The memory 420 (e.g., Programmable Read-Only Memo-type memory) connected to the bus adapter 15 416 contains a program of the bus adapter 416 which is read to the circuit at startup.

All received cells may be re-routed to the transmitter by MAC circuit 408 and / or copied to the computer memory. The VPI / VCI address of the copied and re-routed cells can be changed. The MAC circuit 408 may use the Static Random Access Memory (SRAM) circuit 414 (e.g., ISSI ™ V IS62LV12816L-55T) to store working data.

The network card 316 may comprise a clock 412 which provides a clock signal sV * to the transceiver circuit and the MAC circuit 408. The transmitters may also be synchronized to a more accurate external clock if necessary:: * ·: 25. The MAC circuit 408 has a 30 bit f ··. a counter operating at 972 kHz (19.44 MHz / 20). This counter is used • ·. ···. to provide a timestamp to the received cells. Each received cell is associated with a 30-bit timestamp and a two-bit input port pointer, which is transferred to the computer memory for processing by the device driver 314 when the cell is being transferred.

When transmitting ATM cells from the network card 316 to its measurable interface *: ** 114, 116, the device driver directs the MAC circuit 408 to read the ATM cells to the computer memory: · · · by DMA transfer. The MAC circuit 408 writes the cells for transmission to the ATM. To the PHY circuit 404, 406, which transmits the cells through the line adapter 400,402 to the optical * 35 L ATM line. The ATM-PHY circuit 404, 406 calculates and appends a HEC byte to the cell to be transmitted and generates idle and unassigned ATM cells. Other simple tasks can also be programmed on MAC circuit 408, such as combining ATM cells into a higher-level ATM protocol, for example AAL2 or AAL5, adding an ai-tag to the transmitted traffic to measure quality of service, ATM cell-specific and error counters, received ATMs. 5 bit errors in the cells.

In one embodiment, the analyzer 120 is further configured to identify from the extracted messages the subscriber using the service and / or the packet switched connection on the subscriber. The analyzer 120 registers subscriber identity information (such as International Mobile Subscriber Identity IMSI, Temporary 10 Mobile Subscriber Identity TMSI, Packet Temporary Mobile Subscriber Identity P-TMSI) upon registration to the network (e.g., as described in 3GPP Specification TS 24.008) and subsequently registers packet switched connections. Block 308 of analyzer 120 may provide for monitoring of registrations and for the structured signaling 15. From the connection set-up signaling, the analyzer 120 finds the requested service level (for example, as described in 3GPP specification TS 23.107) and, accordingly, the service level that the network 100 has promised to connect to.

In one embodiment, the analyzer 120 is further configured to divide the subscribers using the service into different service classes based on the requested service level and / or the agreed service level and / or implemented service level. When: V Analyzer 120 measures the connection parameters during the connection, M * compares them with the parameters of the promised service class and determines which service class the subscriber enjoys, these *: **: 25 parameters may be displayed on a subscriber basis, e.g. ; In the example of Figure 8, two subscribers UE1, UE2 ♦ ·. ··· are shown. service categories requested, promised, and received. In addition, the distribution (e.g., as a percentage) of all measured connections (e.g., service class ^) may be displayed: the number of subscribers requesting the service class, the number of subscribers * 30], and the number of subscribers receiving the service class.

In one embodiment, the analyzer 120 is further configured to: · **: identify the internal interface. Thus, for example, in Figure 2, the interfaces 220, ·: · *: 222, 224, 226 to which the measurement sensors 122, 124, 212, 214 are connected. Analyzer. ri 120 can automatically detect the interface being analyzed ** *; 35 and implement a suitable protocol stack decoding component 306 for the interface. Another possibility is to allow the user to select 17 118713 suitable protocol stacks for lines and connections. Authentication can be accomplished by decoding the captured and extracted messages with the protocol stack decoders of the various interfaces and selecting the protocol stack decoding component 306 which gives the most accurate result. In addition, it is possible to identify the direction of traffic through the interface: i.e., whether the traffic is in the direction of the uplink or the downlink by identifying messages that are only moving through the uplink or downlink interface.

In one embodiment, the analyzer 120 is further configured as part of determining the actual service level to determine the internal interface throughput 114, 116. The throughput 114, 116 can be individually determined by adding together the packet sizes of different data packets addressed to and / or transmitted by the subscriber. The overall throughput at interface 114, 116 is obtained by summing the throughput of different subscribers. By measuring the subscriber-specific throughput, it can be verified that the 15 subscribers receive the throughput according to the agreed quality of service. By measuring overall throughput, network congestion can be monitored.

In one embodiment, the analyzer 120 is further configured as part of determining the actual service level to determine the delay 118 between the two internal interfaces 114,116. The delay 118 may be measured, for example, by first analyzing by the analyzer 120 the time at which the single packet bypasses the first interface 114 and retains the identifier of that V packet. The analyzer 120 then registers with the measuring sensor 124

«M

the time at which this packet bypasses the second interface 116. The delay 118: V: can now be calculated in the analyzer 120 by performing a subtraction between the times registered at the various interface surfaces 114, 116. The measurement is performed and the result: '· * · is presented on a per-connection basis to each subscriber. The general delay is shown by • ». * ··. delays seen by individual subscribers on the same time axis without distinguishing between them. Different service latencies have been set for different service classes. By measuring the subscriber-specific delay, it can be verified that the delay does not exceed the service class 30 delay. By measuring the overall delay, network congestion can be monitored.

*: **: In one embodiment, the analyzer 120 is further configured ·: ·· {as part of determining the realized service level to determine the delay 118 step *. communication between two internal interfaces 114, 116. The delay variation (both connection ** *; 35 points and general) can be calculated by subtracting from the individual delay value ····· • · 18 118713 the average of the delay calculated from the previously measured delay values. Variation of the delay indicates the ability of the network to maintain good quality of service.

The critical points of the cellular radio network 100 may be identified based on delay or delay variation. For example, a total delay of 5 ve can be measured, and the distribution of the delay between the various measurement points can be used to determine at which interval the delay is greatest. The interval with the highest delay may be a critical point of the cellular radio network 100, for example, in terms of its data transfer capacity.

In one embodiment, the analyzer 120 is further configured as part of determining the realized service level to identify transactions among the separated Salomands and to determine at least one of the following transactions: total number of transactions, total number of successful transactions, total number of failed transactions, successful and failed transactions. Analyzer 120 may register subscriber-specific and / or connection-specific, e.g., lub and lu-PS interfaces 220, 222, for transactions such as network registration, subscriber identification, connection establishment, connection modification, and connection termination. Transactions can be categorized according to whether they were successful or not, and the time taken to complete the transaction can be measured by the time stamps of the messages. Analyzer 120 can calculate transaction success rates and average lead times for the 20 most measured subscribers and connections, which indicate the network's ability to maintain: V good quality of service. Measured quantities are call success rate, call rate, call set-up time, subscriber terminal movement, Y: data interruption due to imaging, probability of call loss:: ··: 25. Default values can be set for these quantities to which the results • V · can be compared and alarms can be given if necessary.

t ·. * ··. In one embodiment, the analyzer 120 is further configured as part of determining the actual service level to extract the extracted words from the radio parameters of the cellular radio network. Analyzer 120 detects parameters of the radio interface (subscriber access point) 220 at 30 lub interfaces 220 to measure the quality of service (QoS) seen by the end user. Analyzer 120 can determine the most important parameters a) cell-specific, reported by the base station ·: · *: to the base station controller, b) mobile-specific. parameters measured by lime and reported to its base station controller, and c) ** * | 35 connection-specific parameters reported to it by the base station and the base station controller. The parameters are distributed as follows: 19 118713 a) - Total received bandwidth power [dBm] - Transmitted carrier power [%] 5 b) - CPICH RSCP (Common Pilot Channel Received Signal Code Power), provides information cell coverage [dBm] - CPICH Ec / NO, Received energy per chip divided by bandwidth (dB) - LITRA carrier RSSI (Received Signal Strength Indicator), Received wide band power (dB) - GSM carrier signaling strength (GSM), required for inter-system handover (dB) [dB] - Block Error (Transport Channel BLER)

Rate) [%] - UE transmitted power (UE transmitted power), Output power of a mobile station [dBm] 20 - Path loss [dB] c) ·· * 'ΐ V - UL SIR target (Uplink Target for Signal to Interference Ratio) [dB] - SIR Value, Received Signal to Interference Value [dB]! A:. SIR Error Value, (= SIR Value - SIR Target) [dB] 25 - Transmitted code power value [dB] · '· *: - Round Trip Time [chip]. · **. - BLER (Block Error Rate) [%] - BER (Bit Error Rate) [%]; * a By examining the measured values, it will be seen whether the radio network is causing a • • «30 level decrease. For service classes, limit values can be set for different quantities.

• · **: ** For example, as the bit error rate rises, the service class decreases.

*: **: In one embodiment, the arrangement further comprises a test to be connected to a packet-switched ·: · * cellular radio network 100 over data link 218. a terminal 216 configured to generate traffic to the communication link 218 and measure the measurement results from the communication link 218.

• I

20 118713

In one embodiment, the test terminal 216 is further configured to place its measurement results in the traffic it generates, and the analyzer 120 is further configured to extract the measurement results from the captured generated traffic and utilize the measurement results to determine the actual service level of the service.

In one embodiment, the test terminal 216 is further configured to apply a timestamp and a measured total delay to the traffic it generates, and the analyzer 120 is further configured to extract a timestamp and a measured total delay from the hijacked generated traffic and utilize 10 timestamps and measured total delays.

In one embodiment, the test terminal 216 is further configured to provide location information to the traffic it generates, and the analyzer 120 is further configured to extract location information from the hijacked traffic 15 and utilize location information to determine the quality of service on a location-specific basis.

Figure 6 illustrates a possible structure of the test terminal 216. Test terminal 216 includes a computer 602 and a user equipment 600, which includes modem capabilities and is connected to computer 602, for example, by Blue-20 tooth ™, IrDA (The Infrared Data Association) or other known wired or wireless communications technology. The testiter: V terminal 216 further includes software 604 running on the computer 602 and a network interface card 606 through which the user equipment 600 can be controlled via the local: V: network and through which the measurement results can be forwarded to the handheld:::>: 25. The control and measurement results can also be transmitted to the user equipment 216 · * · '; using a cellular radio network.

• ·. * ··. Alternatively, the test terminal 216 may be implemented without a computer 602, whereby the test program is executed by the user equipment 600. There are numerous Java ™ programmable user equipment suitable for this purpose on the market. Alternatively, the transceiver 100 of the cellular radio network • m * ··· '100 may be integrated into the computer 602, whereby the user equipment 600 is not required.

·: * ·: Test terminal 216 may also include a satellite positioning device 608, such as a GPS receiver capable of positioning test terminal 216. *. define. The positioning information of the test terminal 216 may also be determined by other known means i · i * · * j 35, for example using a network positioning service.

• · 21 118713

The user terminal 600 of the test terminal 216 can test the operation of different service classes. If service classes are tied to a UE, testing can be performed on different UEs with a different service class.

In the load test, software 604, using different service classes and data rates, opens connections to either the test server or other suitable server 210 to which data can be sent and received at the test rate.

The analyzer 120 coupled to the network 100 and its measuring sensors 122, 124 identifies the test terminal 216 on the basis of the data 10 transmitted by the user equipment 600, which may be e.g. The transmitted data may be time-stamped at the time of transmission, allowing the analyzer 120 to compute various time-dependent factors from different network interfaces, such as delay and delay variation. The timestamp can be taken from a synchronized clock, such as a GPS clock, so that all measuring points that receive the same clock signal can calculate time reliably.

By performing multiple measurements under different load conditions and different service classes of the network 100, a comprehensive view of the operation of the network 100 is obtained. This can be automated so that the analyzer 120 connected to the network 100 controls the user terminal 600 of the test terminal 216, in which case the measurements can be made automatically, for example, during a Busy Hour.

Test terminal 216 can perform radio network quality measurements, and test terminal 216 can transmit the measured radio network quality parameters and position information to the analyzer 120. This method can combine service quality measurements with radio network quality measurements and obtain a more comprehensive result. ....: 25 In one embodiment, the analyzer 120 is further configured to display the capability of the subscriber terminals transmitting the intercepted messages.

• · \. \ M The features of the subscriber terminal can be retrieved from the database based on the device identifier of the subscriber terminal contained in the ***** captured message. The International Mobile Equipment Identity (IMEI) is a 15-digit numeric code that identifies a subscriber terminal. The device identifier consists of a Type Approval Code (TAC), a Final Assembly .... {Code (FAC), and a Serial Number (SNR). Type Approval Code ....: is the first six digits of the device identifier and identifies the country where the / # type approval has been applied for and the approval number. The type approval code *. **: 35 identifies the make and model of the user equipment. By storing the subscriber terminal characteristics and type approval code in the database, the properties can be retrieved from the database using the device identifier. For example, the subscriber terminal capability can store in the database whether: / or the subscriber terminal requesting the service. Analyzer 120 can store the subscriber terminal device-10 ID and subscriber identity (IMS!) Measurement results. The measurement results are compared with the capabilities of the subscriber terminal on a device-by-device basis, thus providing an indication of what types of devices users are actually using. By retrieving, for example, user equipment that supports multimedia messages but has not been sent by a user from a measurement results database, 15 marketing of multimedia messages can be effectively targeted.

In one embodiment, the arrangement further comprises a management system 108 for managing the packet switched cellular radio network, and the analyzer 120 is further configured to transfer data generated in determining the quality of service to the management system 108, and the management system 108 is configured to automatically configure . In one embodiment, management system 108 is further configured to perform automatic configuration by defining queuing parameters for each service level. Analyzer 120 may send any of the known transport protocols (delay, throughput, delay variation) to service management system 108 based on these known transport protocols. la adjusts the internal parameters of the network elements that it manages to maintain each service class. The internal parameter may be packet queuing parameters associated with the service class when packets have to wait for • · 30 countries to be processed by their own service class queue. Queuing Parameters • · * ··· * are the length of the queue and the order of the priorities between the queues. This can be used to change the load caused by different service classes on the basis of measurement results and thus optimize the network 100 activity.

. ·. Next, with reference to Figure 10, a method for determining the quality of service in a packet switched cellular radio network is described. The method starts at 1000. Initially, 1002 captures intracellular traffic within the cellular border. Then, 1004 distinguishes between the captured cellular radio network traffic and the requested service level and the agreed service level for the service provided to the subscriber terminal. Then, 1006 distinguishes between hijacked cellular network internal traffic, more than one 5 cellular radio network internal interface, both service serving messages and configuration messages implementing cellular radio network internal communication links, and 1008 determines the realized service level / or mapping between service-10 permission parameters. Finally, 1010 determines the quality of service by comparing the actual service level with the requested and agreed service level. The method is terminated at 1012. The method is a practically continuous process, i.e. 1002, 1004, 1006, 1008, and 1010 can be repeated as long as the quality of service is desired. The Basic-15 method determines the quality of service of a single user, but it is clear that the method can be used to determine the quality of service of multiple subscribers / connections sequentially and in parallel to form an overall picture of the quality of service provided by the entire cellular network.

The above described devices may be used to implement the method, but other suitable devices may also be suitable for carrying out the method.

* · ·: V The method may be supplemented by the embodiments described above.

In one embodiment, the para- *: · *: 25 meters that determine the quality of the internal communication links are separated from the Radio: Y: Bearer settings of the extracted messages. In one embodiment, the quality of service profile and the parameters defining the quality of service traffic (Internet Protocol) of the sent messages are separated from the PDP (Packet Data Procotol Context) of the extracted messages.

In one embodiment, correlation of messages separated from different interfaces of a cellular radio network is performed based on addresses contained in mutually separated messages 30. This address can be, for example, an IP (Internet Protocol) address:: ··: In one embodiment, the following messages are recognized: •: ··; a subscriber using the VEL and / or a packet switched connection on the subscriber.

. In one embodiment, subscribers using the service are distributed to different * * · * · *; 35 service categories based on the requested service level and / or the agreed service level and / or realized service level.

24 118713

In one embodiment, an internal interface is identified. In one embodiment, as part of determining the actual service level 1006, the throughput of the internal interface is determined. In one embodiment, as part of determining the actual service level 1006, a delay is determined between two internal interfaces. In one embodiment, as part of determining the realized service level 1006, the delay variation between the two internal interfaces is determined.

In one embodiment, as part of determining the realized service level 1006, transactions are identified from a set of extracted messages, and at least one of the following transactions is identified: total number of transactions, total number of successful transactions, total number of failed transactions, ratio of successful to failed transactions.

In one embodiment, as part of determining the actual service level 1006, the radio parameters of the cellular radio network are extracted from the extracted messages.

In one embodiment, traffic to the data link is generated and measurement results are measured from the data link. In one embodiment, the measurement results are applied to the generated traffic, the measurement results are extracted from the traffic generated from the ka-20, and the measurement results are utilized to determine the actual service level of the service. In one embodiment, a V form is applied to the generated traffic by timestamping and measuring the total delay ··· ve, separating the timestamp and the measured total delay from the captured generated traffic, and utilizing the timestamp and measured total delay water to determine the implemented service level: . In one embodiment, the device: provides location information for traffic generated from 1 · 1, separates location information from captured traffic, and utilizes location information to determine the quality of service on a location-specific basis.

While the invention has been described above with reference to the example of the accompanying drawings, it is understood that the invention is not limited thereto, but that **: ** may be modified in many ways within the scope of the appended claims.

• · • 1 · m · • · ti • · ·

Claims (49)

An arrangement for determining the quality of a service in a packet switching cellular radio network, which arrangement comprises at least a pair of interconnectable measuring devices connected to the cellular radio network (100) as well as a measuring transducer (122) configured to capture internal traffic in the cellular radio network (100), and coupled data processing means to the measuring transducer (122) such as an analyzer (120) configured to distinguish from trapped internal traffic in the cellular radio network (100) a service offered to a subscriber terminal (110) and a requested service level and an agreed service level, the analyzer (120) is additionally configured to separate from interconnected traffic in the cellular radio network (100) from more than one internal interface (114,116) in the cellular radio network (100) a service message and configuring a service message. realizing the service used intimate data transfer links cellular radio network features, characterized in that the analyzer (120) is further configured to determine the actual service level of the service by examining correlations between service parameters contained in the messages distinct from different interfaces 20 (114, 116) of the cellular radio network. (110) and / or mappings between service: **]: parameters and determine the quality of service by comparing the pre-made service level with the requested and agreed service level. 2. Arrangement according to claim 1, characterized in that the analyzer (120) is further configured to locate the poorly functioning parts of the cellular radio network (100) on the basis of measurements made between •. e the different parts of the cellular radio network (100) and the quality of the particular service. Arrangement according to claim 1, characterized in that the "analyzer" (120) is configured to distinguish from particular messages. 30 Radio Bearer settings parameters that determine the quality of intimate data transfer connections. ..., in 4. Arrangement according to any of the preceding claims, characterized in that the analyzer (120) is configured to distinguish from V * s the particular message's PDP context (Packet Data Protocol Context) a quality profile for the service and parameters which determines the quality of the Internet protocol's IP traffic (Internet Protocol). Arrangement according to claim 3, characterized by the quality profile of the service comprising at least one of the following attributes: delay class, reliability class, peak performance effect, priority order class, average performance, traffic class, distribution order, distribution of incorrect data units for the service, maximum size of the service data , uplink maximum bit rate, downlink maximum bit rate, residual bit error ratio, service data unit error delay, transmission delay, traffic processing priority, uplink guaranteed bit rate, downlink guaranteed bit rate. Arrangement according to claim 3, characterized in that the parameters that determine the quality of the service messages IP traffic (Internet Protocol) include at least one of the following: DiffServ (Differentiated Service), IntServ (Integrated Service), RSVP (Resource Reservation Protocol) ) MPLS (Multi-Protocol Label Switching), VOMPLS (Voice Over MPLS). Arrangement according to any of the preceding claims, characterized in that the analyzer (120) is further configured to perform mutual correlation of messages separate from the different interfaces (114, 116) of the cellular radio network (100) based on addresses. which is included in the separate messages. Arrangement according to claim 7, characterized in that the address comprises an IP (Internet Protocol) address. : * · ** 9. Arrangement according to any of the preceding claims, characterized in that the analyzer (120) is additionally configured to: Y: be identified from the messages that are specially a subscriber using the service *: ··: 25 and / or the subscriber's switched packet switching connection. Arrangement according to claim 9, characterized in that · · · ·· *. The analyzer (120) is further configured to divide subscribers using the service into different service classes on the basis of the requested service level: and / or the agreed service level and / or the realized service level. • · * ·; · * 11. Arrangement according to any of the preceding claims, *: * ·: characterized in that the analyzer (120) is further configured to *: * ·: identify the internal interface (114,116). . 12. Arrangement according to any of the preceding claims, ** * | Characterized in that the analyzer (120) is further configured to determine, as part of the determination of the level of service realized, the permeability of the internal interface (114,116). Arrangement according to any of the preceding claims, characterized by the analyzer (120) further being configured to determine as part of the determination of the service level realized a delay between two internal interfaces (114,116). Arrangement according to any of the preceding claims, characterized in that the analyzer (120) is further configured to determine as part of the determination of the level of service realized the delay variation between two intimate interfaces (114,116). Arrangement according to any of the preceding claims, characterized in that the analyzer (120) is further configured to identify, as part of the determination of the realized service level, transactions among the messages which are separate, and to determine from the identified transactions at least one of the following: total number of transactions, total number of successful transactions, total number of failed transactions, ratio of successful and failed transactions, length of transactions. Arrangement according to any of the preceding claims, characterized in that the analyzer (120) is further configured to separate the radio parameters of the cellular radio network from the messages which have been separated as part of the determination of the actual service level. Arrangement according to any of the preceding claims, characterized in that the arrangement further comprises test devices which are to be connected to the packet switching radio network (100) with a data transmission connection (218) as well as a test terminal (216), which is configured to · · ··: generate traffic to a data transfer connection (218) and measure measurement results • '· *: from the data transfer connection (218). • ·. ·· *. Arrangement according to claim 17, characterized in that the test terminal (216) is additionally configured to set its measurement results in the traffic it generated, and the analyzer (120) is further configured to distinguish from the captured generated traffic measurement results. and utilize the measurement results when determining the actual service level of the service. "· *: 19. Arrangement according to claim 17, characterized in that the *: ··: test terminal (216) is additionally configured to put into service as the ge- /. generated a timestamp and a measured total delay, and the analyzer (120) ** * | 35 is additionally configured to distinguish from the generated traffic a timestamp and measured total delay and utilize the timestamp and the estimated total delay in determining the actual service level for the service. 20. Arrangement according to claim 17, characterized in that the test terminal (216) is further configured to put in the traffic as the generated location information, and the analyzer (120) is further configured to distinguish from the captured generated traffic localization information and utilize the localization information. determining the quality of service location-specific information. Arrangement according to any of the preceding claims, characterized in that the analyzer (120) is additionally configured to show the capability of the subscriber terminals which sent messages that are separated. Arrangement according to claim 21, characterized in that the analyzer (120) is further configured to retrieve the subscriber terminal 15's ability from a database on the basis of a subscriber terminal device identifier contained in the message as separate. Arrangement according to any of the preceding claims, characterized in that the analyzer (120) is additionally configured to comply with the characteristics used by the subscriber terminals requesting the service, and to report on the used and / or unused properties for the operation. the operator of the packet switching cellular radio network and / or the subscriber terminal requesting the service. • · Arrangement according to any of the preceding claims, characterized in that the arrangement further comprises an administration system (108) which administers the packet switching cellular radio network ·; (100), and an analyzer (120) is additionally configured to transmit data as • ·. · * ·. arising in connection with the determination of the quality of service of the administration system (108), and the management system (108) configured to automatically configure the parcel-based cellular radio network (100) parameter base on the data obtained from the analyzer (120 ). 25. An arrangement according to claim 24, characterized in that the *: * ·: management system (108) is additionally configured to perform an automatic configuration so that for each service level is determined the driving function saving *. meters. «I · * · *; A method for determining the quality of a service in a packet-switching cellular radio network, which method comprises: 37 1 1 871 3 capturing (1002) the intimate traffic of the cellular radio network; distinguishing (1004) from the trapped intimate traffic of the cellular radio network by both the requested service level and the agreed service level of the service to be offered to the subscriber terminal; and distinguishing (1006) from the trapped internal traffic of the cellular radio network from several of one of the cellular radio network's intimate interfaces of the service message realizing the service and using the service configuration messages that realize the cellular radio network's internal data transmission; Characterized by the downtime process further comprising: determining (1008) the service level realized for the service by examining correlations between service parameters contained in the messages distinct from the different interfaces of the cellular radio network and / or mappings between the service parameters; and determining (1010) the quality of service by comparing the realized level of service with the requested and agreed service level. The method of claim 26, characterized in that the poorly functioning parts of the cellular radio network are located on the basis of measurements made between the different parts of the cellular radio network and the quality of the service provided. 28. A method according to claim 26, characterized in that: V The radio message settings of the particular messages are distinguished parameters ··· which determine the quality of the internal data transmission connections. : V; Process according to any of the preceding claims 26-28, characterized in that from the PDP context of the particular messages: ***; (Packet Data Protocol Context), the service's quality profile and parameter- • ·. · ** are distinguished. which determines the quality of the service messages IP traffic (Internet Pro tocol). ... 30. A method according to any of the preceding claims 26-29, *.,! Characterized in that the method further comprises: executing interrelated correlation of messages separate from the cellular radio network's oil interface on the basis of the addresses contained in the messages as separate. The method according to claim 30, characterized in that /. the address includes an IP (Internet Protocol) address. A method according to any of the preceding claims 26-31, characterized in that the method further comprises: identifying from the particular messages of a subscriber using the service and / or the subscriber's switched packet switching connection. 33. The method of claim 32, further characterized by: classifying the subscribers using the service into different service classes on the basis of the requested service level and / or agreed service level and / or realized service level. The method according to any of the preceding claims 26-33, characterized in that the method further comprises: Identifying an intimate interface. 35. A method according to any of the preceding claims 26-34, characterized in that the method further comprises as part of determining the level of service realized: determination of the permeability of the intimate interface. The method according to any of the preceding claims 26-35, characterized in that the method further comprises as part of determining the service level realized: determining a delay between two intimate interfaces. 37. A method according to any of the preceding claims 26-36, characterized in that the method further comprises as part of determining the level of service realized: determining the variation of the delay between two internal interfaces. ! *: 38. A method according to any of the preceding claims 26-37, ··· characterized in that the method further comprises as part of the determination of the level of service realized: identification of transactions *: **: 25 among the special messages; and determination from the identified transactions: * · *: the actions of at least one of the following: total amount of transactions, total amount of successful transactions, total amount of failed transactions, ratio of successful and failed transactions; the length of the transactions. ·. 39. A method according to any of the preceding claims 26-38, 30, characterized in that the method further comprises as part of the affirmation of the level of service realized: distinct from the specific messages: Method according to any of the preceding claims 26-39, characterized in that the method further comprises: generating traffic to a data transmission connection and measuring measurement results from the data transfer connection 1187. 39 41. A method according to claim 40, characterized in that the method further comprises: setting the measurement results in generated traffic; distinct from the trapped generated traffic of measurement results; and utilization of measurement results in determining the actual service level of the service. 42. The method of claim 40, characterized in that the method further comprises: setting a timestamp and measured total delay in generated traffic; distinguishing the timestamp and the measured total delay from the trapped generated traffic; and utilizing the timestamp and the measured total delay in determining the service level realized for the service. 43. A method according to claim 40, characterized in that the method further comprises: putting location information in generated traffic; distinguishing location information from the captured traffic generated; and utilizing location information in determining the quality of service location-specific. 44. Computer programs for determining the quality of a service in a packet switching cellular radio network, which computer program encodes the computer program commands to execute a computer process which determines the quality of the service in the packet switching cellular radio network, which computer process run in the computer comprises: catching (1002) of the intimate traffic of the cellular radio network; : V distinctive (1004) from the trapped intimate of the cellular radio network «M traffic of both the requested service level and the agreed service level: V: of the service to be offered to the subscriber terminal; and *: · *: distinguishing (1006) from the trapped intimate traffic of the cellular radio network from more than one of the cellular radio network's intimate interface of bed. service message realizing the service and using the service configuring messages realizing the cellular radio network's intimate data transmission connections; Characterized in that the method further comprises: * determining the (1008) realization of service level of service *: **: by examining correlations between service parameters contained in the ·: ··: messages distinct from the different cellular radio networks interface y. and / or mappings between the service parameters; and determining the quality of the service (1010) by comparing the * * realized service level with the requested and agreed service level. 118713 40 45. Computer programs according to claim 44, characterized in that the poorly functioning parts of the cellular radio network are located on the basis of measurements made between the different parts of the cellular radio network and the quality of the service provided. 46. Computer programs according to claim 44, characterized from the special message radio bearer settings of parameters which determine the quality of the intimate data transmission connections. 47. Computer program according to any of the preceding claims 44-46, characterized in that from the specific messages PDP context 10 (Packet Data Protocol Context) the service's quality profile and parameters that determine the quality of the service messages IP traffic (Internet Protocol) are distinguished. ). 48. Computer programs according to any of the preceding claims 44-47, characterized in that the computer process further comprises: executing a mutual correlation of messages which are separate from the different interfaces of the cellular radio network on the basis of addresses contained in the particular messages. 49. Computer program according to claim 48, characterized in that the address comprises an IP (Internet Protocol) address. ·· 1 • · 1 • · • · ··· * · • 1 ·· «* 1 i · · • 1 1 • · • · ·· 1 • · · • · · · · 1 · • · • · · ·· ·· • · • ·· * · • · ·· 1 «1 • · • · • · · •« t