Abstract: A method of improving connection quality and system capacity in a cellular radio system is disclosed. Each cell in the cellular radio system has at least one base station (BS) communicating with subscriber terminals (MS) in its area. The method is characterized in that the subscriber terminal transmits in two time slots and receives in two time slots during one frame, and that the subscriber terminal employs the time slots of the frame following the frame used for transmission and reception for measuring neighboring base stations. Owing to the method and cellular radio system, methods developed for improving connection quality and system capacity in a cellular radio system, such as frequency hopping, discontinuous transmission and power control, can be used on the traffic channels of the base station BCCH carrier wave frequency.

Abstract: The invention relates to a method of facilitating measurement of a transmission level, and a base station. The base station moves its broadcast (BCCH) from one time slot (10 to 17) to another so that the broadcast (BCCH) is sent in different time slots (10 to 17) of successive frames. In the long run, the broadcast (BCCH) is preferably sent in all the time slots (10 to 17).

Abstract: There are proposed a method for determining timing differences between a plurality of radio transmitters (BTS) and a radio network incorporating the method. Timing information of signals received by measuring means from said plurality of radio transmitters (BTS) is determined. The timing differences between said plurality of radio transmitters (BTS) are determined on the basis of said timing information determined by said measuring means and the respective distance differences between said plurality of radio transmitters (BTS) and said measuring means. This method can be advantageously applied to locating mobile stations in a mobile radio network.

Abstract: A method for monitoring with discontinuous BCCH carriers in GSM, in which a mobile station can monitor a neighboring base station in each frame, or one in each frame. i.e. once in 4.615 ms, even where the base stations do not transmit continuously on a beacon carrier. Control information is intermittently transmitted from one or more base stations to one or more mobile stations. Traffic information is transmitted between the base station and the mobile station. The base station using n (n less than 8) time slots of a TDMA frame. The base station is monitored by the mobile station within a predetermined time slot of the TDMA frame during which the base station transmits additional information that is neither control information nor traffic information. The monitoring by the mobile station during the predetermined time slot (TS) is synchronized with the monitoring of further provided mobile stations.

Abstract: A method of transmitting messages with text-mode contents in a telecommunication system, and a telecommunication system comprising means for transmitting messages with text-mode contents from a sender to a receiver, a database containing at least one first character string containing at least one character, and at least one corresponding second character string containing at least one character, and message-editing means adapted to replace each second character string according to the database in the textual contents of the message with a corresponding first character string before the message is delivered to the receiver.

Abstract: Method and an apparatus for determining the pathloss between a base transceiver station (BTS) and a mobile station (MS) in a mobile radio network. In detail, a signal carrier (BCCH) having a transmitting power (PTXAV) is transmitted by a first base transceiver station (BTS-1). Thereafter, said signal carrier (BCCH) transmitted by said first base transceiver station (BTS-1) is received by a mobile station (MS) spatially separated from said first base transceiver station (BTS-1), and the signal level (PTXAV) of the received signal carrier (BCCH) is detected by said mobile station (MS). Furthermore, the detected signal level (PTXAV) of said received signal carrier (BCCH) is transmitted to a second base transceiver station (BTS-2) of a neighboring cell. In addition, the detected signal level (PTXAV) of said signal carrier (BCCH) received by said mobile station (MS) is compared with the transmitting power (PTXAV) of said signal carrier (BCCH) transmitted by said first base transceiver station (BTS-1).

Abstract: The invention relates to a frequency hopping method and a radio system. Frequency hopping is implemented downlink to the frequency of the broadcast control channel. The radio system comprises a network part (100), a subscriber terminal (102) and a radio connection (104) as the transmission path. The novelty is that the broadcast control channel does not usually perform frequency hopping. The simplest implementation of the system is a software modification in the network part (100) and the subscriber terminal (102). The invention can be applied to all radio systems using frequency hopping, particularly to the GSM/DCS 1800 systems and the UMTS system.

Abstract: The invention relates to a method for estimating the interference level in a cellular radio system comprising in each cell a base station (100) in each cell, and a number of subscriber terminals (108 to 112) communicating with the base station. The terminals measure power levels from those frequencies which are on the list that is maintained by the terminal and comprised those base stations and frequencies to which the terminal can perform a handover. In the solution of the invention the list also comprises frequencies whose power level information is used for the frequency planning of the system. Frequency planning can thus be implemented without any separate means.

Abstract: A private base station (231) provides communication directly between a cellular mobile telephone (201) operable within a cellular network and a public switched terrestrial network (116). The base station is configurable to establish communication to a mobile telephone while minimizing interference with similar base stations. The base stations may transmit on similar frequencies but within different time division multiplexed time slots.

Abstract: A private base station (231) provides communication directly between a cellular mobile telephone (201) operable within a cellular network and a public switched terrestrial network (116). The base station is configurable to establish communication to a mobile telephone while minimizing interference with similar base stations. The base stations may transmit on similar frequencies but within different time division multiplexed time slots.

Abstract: A method and a system in a digital radio system for signalling between a base station and a subscriber terminal. The signals transmitted over the radio connection between the base station and the subscriber terminal comprise bursts consisting of symbols. The bursts comprise a known training sequence. According to the invention, the training sequence is used for signalling. By the invention, it is possible to implement signalling related to power control of the base station or the subscriber terminal, or in packet transfer, the numbering of bursts, packets or other data blocks.

Abstract: The invention relates to a method for the determination of neighbours of a sub-cell (122C) in a cellular radio network base station (100) applying dynamic channel allocation, and to a base station (100) implementing the method. The base station (100) comprises at least two sub-cells (122A, 122B, 122C). Each sub-cell (122A, 122B, 122C) comprises an antenna unit (118A, 118B, 118C) with a fixed connection to the base station (100). A transceiver (TRX1-TRX2-TRXN) is used for transmitting a signal through an antenna unit (118A, 118B, 118C). A measurement unit (124) measures through the antenna unit (118A, 118B, 118C) the reception power of the received signal. The invention is characterized in that a transceiver (TRX1) is used for transmitting a test signal (200) through the antenna unit of the sub-cell (122C) under examination. The test signal (200) is received though the antenna units (118A, 118B) of the of the sub-cells (122A, 122B).

Abstract: The invention relates to a method of implementing a handover in a cellular radio system. The cellular radio system has at least on cell (Cd) which comprises at least two subcells and in which all available frequencies are dynamically used. The cellular radio system comprises in each cell (C, Cd) at least one base station (BTS) which communicates with subscriber terminals (MS) located within its area. A handover from an old cell to a new cell (Cd) applying dynamic channel allocation is characterized in that only BCCH carrier frequency time slots comprising control channels are transmitted all the time in all subcells of the cell(Cd). The method allows traffic channels of a BCCH carrier frequency to be dynamically reused in subcells of the cell (Cd), providing the improved system capacity.

Abstract: The invention relates to a method for determining the position of a mobile station, a positioning system and a mobile station. According to the invention, a mobile station (21) receives signals from at least two base stations (22, 23, 24) and determines time differences of the clocks of the received signals. The mobile station (21) sends information about the time differences to a positioning service center (26) of the mobile communication system which calculates the position of the mobile station (21) on the basis of the time difference information and base station coordinates and clock information. With the method it is possible to measure signals the strengths of which remain below the minimum decoding level. According to the invention, it is also possible to measure bursts containing short training sequencies to improve timing measurement accuracy and measuring speed.