Abstract: A test method in an RF communication system. In the communication system, at least one RF communication channel lies about a known carrier frequency in an RF communication band. According to the method, a diagnostic signal is introduced into a circuit to be tested, such as a linear power amplifier, the diagnostic signal having an RF diagnostic frequency lying within the communication band. The diagnostic signal is down converted to an intermediate frequency for diagnostic purposes so that DSP is simplified. The diagnostic frequency is selected based on the known carrier frequency of the communication channel so that the communication channel is not down converted as an image band with the diagnostic signal.

Abstract: The invention relates to a synchronization method in a telecommunication system that includes a transmitting unit, a receiving unit and a transmission link between these two. The information to be transmitted in the telecommunication system is transferred from the transmitting unit to the receiving unit in a data frame that includes an information section and a synchronization section. The bits of the synchronization section are in each consecutive data frame always in the same state as in the previous data frame, and the synchronization section consists of at least one synchronization bit in a selected logical state. In the method, the transmitting and receiving units of the data frame are mutually synchronized with synchronization bits.

Abstract: The invention relates to an arrangement for radio frequency signals particularly in a duplex filter summing part comprising a conductive housing and at least one common transmission line for at least two different signals. In order to reduce intermodulation distortion of signals, which arises in the summing part, the housing of the summing part is arranged to function as a ground plane for the transmission line without the ground plane of a printed board or a ground plane otherwise connected to the transmission line.

Abstract: A method of directional radio communication in a mobile communication network between a first station and a second mobile station includes the following steps. Signals transmitted by the second station are received at the first station. A parameter representative of the distance between the second station and the first station is monitored. A signal beam is transmitted from the first station to the second station, the angular spread of the signal beam transmitted by the first station being dependent on the distance between the first and second stations.

Abstract: A method of directional radio communication in a mobile communication network between a first station (4) and a second mobile station (MS) comprises the following steps. Communication data transmitted by a second station (MS) is received at the first station (4). The communication data can travel via one or more of a plurality of signal paths and is received as a set of signals from one or more of a plurality of different beam directions. A first beam direction corresponding to the beam direction from which a first one of the signals is received by the first station representing a shortest one of the signal paths is determined as is a second beam direction corresponding to the beam direction from which one of the signals having the greatest signal strength is received. Where the first and second beam directions are different, communication data is transmitted from the first station (4) to the second station (MS) in both the first and second beam directions.

Abstract: A method and an arrangement for detecting the misuse of the call forwarding service in a mobile communication system. In the invention, call forwarding is activated for routing a call addressed to a mobile subscriber to a forwarding number supplied by the mobile subscriber; the forwarding number is modified by registering call forwarding to another number; the number of call forwarding registrations is counted subscriber-specifically; and an alarm is generated when the number of call forwarding registrations exceeds a predetermined maximum value during a predetermined period of time.

Abstract: A method of combining signals to a base station and combining signals in a radio network. The base station including an antenna, a modulating mechanism for generating and modulating carrier waves, and transmitters for generating signals that are modulated by the generated carrier waves. The signals are transmitted using an antenna. The modulating mechanism modulates two or more signals per generated carrier wave. The base station includes an amplification mechanism for amplifying the signals modulated by the carrier waves, and a mechanism configured to passively combine the signals modulated by the carrier waves to the same antenna after amplification.

Abstract: The invention relates to a method for creating a synchronization network in a telecommunications network, comprising several nodes (D . . . M) interconnected with links and sending synchronization status messages indicating the quality level of the corresponding signal relative to the synchronization. At least one master clock (PRC) is used as a synchronization source for the network nodes, and the synchronization network is established by selecting, in accordance with a topology defined by the links, synchronization chains formed by successive nodes, through which chains the signal of at least said main clock is distributed to the nodes in the chain, and by defining for the different nodes in the chain a node-specific priority list including node interfaces at different priority levels, determining the synchronization source to be selected by the node when signals of equal quality levels are received on the node connections.

Abstract: A signal processing system is provided which describes a method and apparatus to determine the absolute time of arrival of a transmitted signal and to determine the location of a transmitting device by determining the relative difference in time that a transmitted signal is received at three or more receivers which are spaced apart with respect to each other. The method and apparatus is applicable to all systems which transmit discrete signals or signals which comprise composite components. The system comprises a ramp detection component to track the arrival of the signal and to determine, to a high time resolution, the arrival of a signal by identifying a particular feature of the transmitted signal. The time-of-arrival of the signal is determined with reference to a timing circuit.

Abstract: The invention relates to a method of handling the event recordings in a service database system. The database comprises measurement tables (MT) which include consecutive rows (Ri). A single row comprises data about a single measurement object. In order to be able to share the processor load evenly (a) the counters on the measurement table row have been duplicated, and in every recording interval the counter values of a given counter group on said row are incremented, and the counter values of another counter group on the same row are recorded according to a predefined rotation principle, and (b) the recording and zeroing process of the counters is started during each recording interval repeatedly at short intervals, and during each startup the processing is performed on a limited portion of the measurement objects included in the measurement group.

Abstract: A method for controlling a base station (100, 200), used in a cellular radio system employing a TDMA multiple access method and having terminals (41-45), sectors (51-55) and at least one base station (100, 200) which transmits one or more carriers, and which has a number of baseband parts (16, 25), and at least one transmitter/receiver unit (12, 22), and which is connected to the rest of the system by a digital transmission line (70) in which information is transmitted in timeslots. The timeslots are allocated as required to different carriers, the baseband parts (16, 25) are allocated as required to different sectors (51-55) and the timeslots are allocated to different carriers so that one carrier will have no more than 16 timeslots.

Abstract: The invention relates to a method for load control and a radio system. In the invention a load result describing the load is cell-specifically formed. The load result is formed either by comparing a signal strength of desired signals (23) and a combined total strength of interferences (13) and the desired signals (23) or by weighting a signal-to-interference ration with a bandwidth or a data transmission rate. The load result is compared with a threshold value of the highest load level allowed of a cell (1). The data transmission rate in the cell (1) is increased if the load result is smaller than the threshold value. The data transmission rate in the cell (1) is reduced and the establishment of new connections is avoided if the load result exceeds the threshold value. In heavy load situations a signal-to-interference objective is also changed in order to balance the load result.

Abstract: A traffic source requesting connection states about itself in accordance with the ATM specification the PCR (Peak Cell Rate), the SCR (Sustainable Cell Rate,) the BT (Burst Tolerance) and the desired probability of cell loss PLOSS. The CAC function uses these parameters for computing certain parameter ratios. These computed parameters or corresponding parameters closest to these are sought from a pre-formed table and the same table is studied to find out the equivalent capacity corresponding to the parameters. This capacity is named as the equivalent capacity of the source requesting connection and the source is allowed access and permission to send, if there is free link capacity. Otherwise the request is dismissed. The equivalent capacities of the table are defined by using large deviation approximation which is known as such and which has been developed for a bufferless queue and for homogenous traffic.

Abstract: The invention relates to a method for producing application-specific computer-controlled services. An application-specific program code is generated automatically and an application-specific computer program for providing said service is formed. In order to perform changes more easily than before, the computer program is divided into three groups. The first group (A) is formed only of such a code that remains the same regardless of the application, and the second and the third group are provided with a code produced by means of said generation in such a way that (a) the second group (B) only includes a code produced by means of said generation and (b) the third group (C) contains a code produced with said generation that is to be changed by the designer after the generation. The generating means (11) are informed of whether the code to be generated is produced for the second or for the third group.

Abstract: A method and system for monitoring traffic in a mobile communication network are disclosed which identify geographically regions of high traffic concentration or “hot spots”. This is done to allow the traffic distribution within a given area to be analysed so that network operators can retrieve information concerning the places where more capacity is needed. The hot spots are located by analysing reports from the mobile stations to identify the most often occurring cell patterns. These cell patterns can be associated with geographical locations which can then be visually displayed to identify the hot spots.

Abstract: The invention relates to a method of handling the event recordings in a service database system. The database contains stored measurement tables (MT) which include consecutive rows (Ri). So that the activation values of individual objects can be changed or individual objects can be added/deleted at any time causing as little interference as possible to the measurement, the value of the activation parameter of the measurement object is stored on the row and the zeroing of the counter groups of the measurement object is performed during the recording and zeroing phase of the counters so that for each counter group of the measurement object the first processing after the activation of the measurement object in question is forced to be such that the recording of the counter group is blocked, but the zeroing of the counter group is allowed.

Abstract: Conference call set-up is conventionally controlled with special keys # and * of a telephone set. Today these functions are performed by means of intelligent network technology. A problem with standard CS-1 and CS-2 intelligent network architectures is that they do not allow merging of call segments initiated by a Service Control Point (SCP). According to the invention: in response to the messages from the service control function (SCF), the service switching point (SSP) creates a separate call segment for each B subscriber; in response to the creation of a call segment (CS1-CS3), the service switching point (SSP) sends a message about this to the service control function (SCF); in response to a message confirming the creation of at least two call segments (CS1-CS3), the service control function (SCF) orders the service switching point (SSP) to merge the call segments created.

Abstract: In cellular radio systems re-paging of a mobile station (MS) loads the mobile communications network very much, especially the limited radio path resources of the network. The present invention concerns a paging method in a cellular radio system including several cells (C1-C10). In the method a first paging of the mobile station (MS) is performed in all cells (C1-C10) of the area according to the stored location information. According to the invention, the paging method is characterized in that in the method the area according to the location information is divided according to the cell division into at least two sub-areas, each one of which is formed of at least one cell, limitation values for the number of pagings are defined for the cells on a sub-area basis and re-paging of the mobile station is limited in each cell of the area based on the said limitation values for the number of pagings.

Abstract: The present invention relates to a procedure for transmitting information to a predetermined subscriber line or predetermined subscriber lines in a telephone network. In the procedure of the invention for transmitting information to a predetermined subscriber line in a telephone network, which comprises a telephone exchange (1), a number of subscriber lines (2) connected to it and a terminal device (3) connected to the subscriber line, the subscriber number of the subscriber line acting as source of information is stored in the telephone network; the subscriber numbers of the predetermined subscriber lines to which the information is to be transmitted are stored in the telephone network; the information to be transmitted is stored in the telephone network and/or in a peripheral connected to it; and, using a link without actual connection, the predetermined information is transmitted of the predetermined subscriber lines.

Abstract: A temperature compensated variable attenuator comprising a variable attenuator having at least one diode with temperature variations across the at least one diode producing a temperature offset signal. A bias source coupled to the variable attenuator supplies a biasing signal to the at least one diode through a temperature compensation source. The temperature compensation source is coupled between the bias source and the variable attenuator with the temperature compensation source comprising at least one diode capable of producing a temperature offset signal approximately equivalent to the temperature offset signal produced by the first at least one diode. The approximate temperature offset signal subtracted from the biasing signal produces a temperature compensated bias signal that is supplied to the variable attenuator.