Abstract: The invention relates to a diversity combining method and to a receiver. In diversity combining, outputs (33) of a matched filter (25) of each branch are weighted with a quality estimate (32) which is generated in quality means (28b) in such a matter that the quality estimate (30) is proportional to the inverse of the interference strength (31) of the signal. The strength (31) of signal interference is generated in interference means (28c) e.g. in variance-like fashion from the differences between a reference signal (30) generated in reference signal means (28a) as the convolution of the estimated channel impulse response and the predetermined sequence and a signal received from the channel.

Abstract: The invention relates to a data transmission method used in a CDMA-type radio system. A base station and terminal equipments exchange data at least in a packet switched mode, and a terminal equipment transmits to the base station on a random access channel a random access signal comprising at least a preamble (100) and a data part (102) multiplied by a spreading code. A predetermined set of spreading codes and signature sequences (104) are stored in the terminal equipment, and each signature sequence (104) determines one spreading code. The terminal equipment selects one signature sequence (104) by a random process from the set of signature sequences and adds the selected signature sequence (104) to the preamble (100) of the random access signal. Further, the terminal equipment uses the spreading code corresponding to the selected signature sequence (104) in the data part (102) of the random access signal.

Abstract: The invention relates to a handover method in a mobile communication system where the serving base station measures the level and/or quality of the uplink signal of a mobile station. The base station controller commands neighboring base stations to measure the level and/or quality of the uplink signal of the mobile station, when the serving base station has measured an uplink signal level and/or quality level lower than a predetermined triggering value. The base station controller performs a handover to the neighboring base station that has measured the most suitable uplink signal level and/or quality, when the serving base station has measured an uplink signal level and/or quality below a predetermined threshold value for handover.

Abstract: A scheme for providing a notification to a Mobile Station (MS) to initiate a location update in a mobile telecommunication system, a scheme for providing update of location of the MS to a new Core Network (CN) entity via interface between the CN entities, a scheme for providing update of location of the MS to a new CN entity via interface between a CN entity and a Serving RNC (SRNC), a scheme for providing an inter Core Network (CN) handover, e.g. inter-SGSN handover, in a mobile telecommunication system, are disclosed.

Abstract: The invention relates to a method of improving the quality of a radio connection (170) in a cellular radio network. Relevant for the invention, the cellular radio network includes a base station system (126) and a subscriber terminal (150). A bidirectional radio connection (170) using a directional antenna beam (304) is provided between the base station system (126) and the subscriber terminal (150). In the method, in the base station system (126) an angle of incidence (302) of the directional antenna beam (304) is formed on the basis of a received radio signal (170A) transmitted by the subscriber terminal (150). The base station system (126) transmits a radio signal (170B) to the subscriber terminal (150) in the direction of an angle of departure (308) formed on the basis of the angle of incidence (302). In accordance with the invention, a ratio is formed for the imbalance between the downlink and uplink traffics.

Abstract: The claimed invention relates to a radio telecommunications system using channels with high penetration capacity. When a user terminal enters a shadowed area, the user terminal starts listening to a paging channel allocated for transmission of a high-penetration paging message. The subscriber thereby remains with reach of teleservices not otherwise provided for.

Abstract: A method of implementing dynamic channel allocation in a cellular radio system. The cellular radio system includes, in each cell, at least one base station communicating with subscriber terminals within its area. The system includes, in one cell, at least two subeeils, which include an anrenna unit and in which all available frequencies are dynamically used. All antenna units listen to control channels that subscriber terminals use for connection set-up and a base station measures the power level of the control channels through the antenna units, on the basis of which an antenna unit providing the strongest sigxzal is selected for conricction set-up. The base station measures through the antenna units the interference level of all available traffic channels, on the basis of which that traffic channel in an antenna unit selected for connection set-up which has the least interference is selected for communication.

Abstract: The invention relates to compressing and transmitting data on a connection between two parties in a telecommunication system comprising at least one slow transmission channel, such as the air interface Um of the radio network. The data to be transmitted are assembled into frames (F) comprising a header section (1) and a data section (2). Prior to transmission, at least the header (1) or the data section (2) of at least some of the frames (F) are compressed. The transmitting party has available at least two different compression algorithms and the receiving party has available at least two different decompression algorithms. The transmitting party compresses at least one section (1, 2) of at least some of the frames (F) with at least two different algorithms, and transmits the frame (F) compressed with the algorithm that produced the best compression ratio.

Abstract: A method for allocating a packet associated control channel to mobile stations in a packet radio system, particularly in a GPRS system. The sends a resource allocation request, to which a network responds by allocating to the mobile station a TFI identifier and a USF identifier. The network then sends data packets in blocks, at least some of which comprise a polling field (SIP), a polling state which indicates that the mobile station is to acknowledge received data packets on the control channel. To ensure that a mobile station receiving in downlink would not prevent the network from allocating one uplink mobile station to said channel, the allocation of the packet associated control channel is, in accordance with the invention, independent of a possible USF identifier.

Abstract: The invention relates to a transmission method and a radio system comprising a transmitter and a receiver that communicate with each other by means of signals they have transmitted. The signals propagate along different paths from the transmitter to the receiver, which comprises means for combining the signals that have propagated along different paths after the reception. The radio system comprises transmitting means for transmitting for each connection at least two signals that are combined in the means into one signal, and measuring means for measuring the combined signal and for estimating the optimality of the transmission. The radio system also comprises control means that adjust, on the basis of the measurement and estimation, the phase of at least the signal that is to be transmitted in the downlink direction in the signal transmission by the transmitting means in order to decrease accumulation of signals during the combining of the signals.

Abstract: The invention relates to a reception method and a receiver used in a TDMA radio system. The receiver receives signals placed in time slots allowing the receiver to establish connections. The receiver receives the signals, which are placed in time slots and vary in strength. The receiver comprises amplification means amplifying the received signals with an amplification coefficient of a particular size. The receiver is arranged to receive connection establishing signals from time slots and to form at least two sets of time slots from the time slots, and the amplification means amplify the signals in different sets of time slots with an amplification coefficient of a different size. The amplification means amplify the signals in the same set of time slots with an amplification coefficient of the same size.

Abstract: A method and apparatus for providing resource discovery using multicast scope selection is disclosed. The method includes the discoverer sending a first request message having a first selected scope to a known multicast group, setting a timer after the first request message is sent, detecting whether a confirm message is received from an endpoint before the timer expires, terminating when a confirm message is received from an endpoint prior to the expiration of the timer, determining whether a scope increase is allowed when a confirm message is not received from an endpoint before the expiration of the timer, terminating when a scope increase is not allowed, increasing the scope to the second selected scope when a scope increase is allowed, resetting the timer and sending a second request message having the second selected scope when a confirm message is not received from an endpoint in response to the first request message, the second selected scope being greater than the first selected scope.

Abstract: The invention relates to a method and an equipment of preventing the misuse of a copied subscriber identity in a mobile communication system. The use of a subscriber identity is restricted to predetermined terminals, each having an associated equipment identity in such a way that: a number of allowable equipment identities is defined for at least one subscriber identity, and a data base linking said subscriber identities and the equipment identities allowable to them is created; the terminal sends the terminal user subscriber identity and its dedicated equipment identity to the rest of the system; the rest of the system compares whether the equipment identity sent is allowable to the subscriber identity sent; as a response to the equipment identity sent being allowable to the subscriber identity sent, the use of the terminal is permitted, and otherwise the use is denied.

Abstract: A system and method for integrating a priority-based quality of service in CDMA communication systems that implement data packet transmission, in order to effectively allocate radio resources. Data packet transfers are selectively allocated over a wireless interface operating under a Code Division Multiple Access (CDMA) protocol. A nominal bit rate is established for each user desiring access to the CDMA interface. A relative packet priority is calculated for each of the data packets based on an actual bit rate at the source of the CDMA interface and the established nominal bit rate. An allowable packet priority is calculated for the CDMA interface based on a signal-to-noise ratio of the CDMA interface, and those of the data packets having a relative packet priority greater than or equal to the allowable packet priority of the CDMA interface are transmitted across the CDMA interface.

Abstract: The invention relates to a method for estimating an impulse response, and a receiver whose received signal is formed of bursts comprising a training sequence and the receiver comprising analog-to-digital converter for sampling the received signal and signal processor for measuring a DC offset in the samples. To simplify the receiver structure, the receiver comprises a calculating device for calculating the impulse response by correlating the samples taken with the training sequence before removing the DC offset, and the signal processor for removing the DC offset effect from the calculated impulse response.

Abstract: The invention relates to a method for determining the strength of co-channel signals, and a receiver utilizing the method. The training sequences of the signals to be received are classified into subsets, and a channel estimate related to the signal is formed by comparing the training sequences of the received signal to the training sequences of the subset signals. By means of the channel estimate, a strength estimate is formed for each received signal, the estimate being used to arrange the received signals according to their strength. When the signal strengths are known, it is possible to decrease the effect of the interference signals on the signal to be detected. In a diversity receiver, a correlation result can be formed of the channel estimates of the signals of each subset, excluding the signal to be detected, the result being used in interference elimination.

Abstract: A telecommunication network exchange and method of playing an announcement to a call party in a telephone exchange during connection set-up. The invention is based on the idea of totally separating the detection of the need for an announcement from playing the announcement. The need for the announcement is detected in a conventional manner at a given stage of call set-up. However, the exchange does not play the announcement immediately, but delays playing it up to a later stage of call set-up or up to a later event, if necessary. The announcement may be played, for example, not until collection of additional dialing is definitely terminated, the call is confirmed to be successful, the announcement is confirmed to be necessary/correct, and so on. As a consequence of the delayed playing of the announcement, wrong and unnecessary announcements and the failure of the call are thus avoided.

Abstract: A digital data transmission system includes a transmitting party, a receiving party, a non-transparent circuit-switched data connection between the transmitting and receiving parties, a control element for changing the data transmission capacity of the data connection, and a sliding-window data flow control protocol where the number of transmitted data frames to which the transmitting party has not received an acknowledgement from the receiving party is not allowed to exceed the size of the sliding window. The transmitting and receiving parties are arranged to change the size of the sliding window when one or both of them receive information from the control element on a change in the data transmission capacity of the data connection.

Abstract: A cellular radio system and a method for transmitting pilot channels in a cellular radio network includes, in each cell, at least one base station communicating with mobile stations located within its area. The base stations transmit a data signal in the downlink direction by using transmission directions that change in time and which transmit information about the system to the mobile stations on control channels. In order to enable the most efficient use of the pilot channels, the base stations transmit at least one first pilot channel with a predetermined radiation pattern and second pilot channels on transmission directions that change in time. The predetermined radiation pattern determines the cell coverage area.

Abstract: The invention relates to a method for controlling a receiver and to a receiver realized with the rake principle and comprising a number of correlator branches (200-204) that can be synchronized with the received signal. In order to enable the rapid operation of the receiver, the correlator branches (200-204) of the receiver according to the invention comprise means (304) for searching for advantageous signal components and means (116, 310) for guiding a branch to receive an advantageous signal component it has found.