Abstract: Method and system for automatically configuring supervision and performing supervision in a supervision system comprising a supervision center; and a supervision block which contains processes performing supervision tasks. The supervision system is preferably a telephone switching system. In the method, the supervision block performing supervision functions is monitored and/or controlled via the supervision center. Furthermore, the objects monitored by a supervision block process performing supervision tasks are automatically registered in the supervision center as the supervision block processes become ready for operation, and information about the supervision block processes and/or about the services produced by them and/or about the objects being monitored is stored in the supervision center.
Abstract: The invention relates to a cellular radio network and a method for increasing traffic carrying capacity in a cellular network. The operating frequency spectrum of the cellular network has been divided in such a way that typically both regular frequencies and super-reuse frequencies are employed in each cell. The regular frequencies use a conventional frequency reuse pattern to provide seamless overall coverage. A very tight frequency reuse pattern is used for the super-reuse frequencies to provide additional capacity.
Abstract: The invention relates to a data transfer method in a digital cellular radio network, the method comprising channel coding the information to be transferred for transmission. In order to implement a data rate of 14.4 kbit/s in GSM type of cellular radio systems by employing one time slot only for data transmission, the channel coding according to the method of the invention comprises grouping bits to be transmitted in blocks having the minimum size of 288 bits, carrying out convolutional coding for the blocks with a code rate of ½ by using GSM convolutional coding polynomes, and puncturing the bits obtained by deleting bits from each block so that blocks containing no more than 456 bits will be obtained.
October 31, 1996
Date of Patent:
November 29, 2005
Nokia Telecommunications Oy
Riku Pirhonen, Pekka Ranta, Jyri Suvanen
Abstract: An interference cancellation method and a receiver operating according to the method, in which multiple access interference cancellation of a received signal is performed and a confidence coefficient for estimates obtained from the received signal is calculated. In order to effect a reliable interference cancellation, the receiver utilizes the calculated confidence coefficients to control the multiple access interference cancellation.
Abstract: A method and arrangement for forming an address for use in signal predistortion. The arrangement is used to form a corrector table address employed in the signal predistortion to compensate for signal distortions. The signal distortions are compensated for using corrector coefficients that are placed in the corrector table and retrieved from the table on the basis of the address. The arrangement includes calculation means that, on the basis of the received signal, calculate a result corresponding to the squaring of a received signal. The arrangement further comprises summing means that, if required, sum up the results corresponding to the squaring, the sum forming a base address. The arrangement further comprises error correction means that correct the calculated base address by means of an address correction value.
Abstract: A method for duplex telecommunication connection in radio connections is based on a frame-structured interactive communication and a radio system where the frame-structured interactive communication is performed in the radio connections. A means is provided for improving the use of channel resources in implementation of interactive telecommunication connection by providing an FDD connection with one or more TDD dimensions. A full-duplex frequency band is time-duplexed into two or more sub-bands in which interactive communication takes place substantially independently. Transmissions in different transmission directions in each sub-band occur at different times, but simultaneous transmission can occur in different sub-bands in different transmission directions. The message is received entirely in one transmission direction before it needs to be responded to in another transmission direction in a particular sub-band.
Abstract: Speech is transmitted between a base station (BTS) and a TRAU by converting a speech signal into a parameter group which is inserted in a traffic frame which is transmitted as a packet comprising a header and a payload. In accordance with the invention, the payload is formed of the contents of several traffic frames until the payload is essentially full, and a packet is sent to the destination via the transmission network. At the destination the traffic frames are separated from the payload of the received packets and they are passed to a speech decoder. The packing of packets full can be started about a second after the beginning of the connection and after pauses, in which case the ending of a pause is transmitted to the listener as fast as possible.
April 30, 1999
Date of Patent:
May 18, 2004
Nokia Telecommunications Oy
Mikko Olkkonen, Mauri Tikka, Kristian Rauhala
Abstract: The invention relates to a method for transmitting data in a telecommunication system that comprises at least one packet-switched transmission network, in which data is transmitted in data packets of a standard length, the number of such standard lengths being determined in advance. To transfer information in as compact form as possible, a unique length code (L) is maintained for each standard length, and to each packet is added a length code (L) corresponding to the header of the packet to be transferred to indicate the length (3) of the packet. The invention further relates to a telecommunication system in which the method of the invention can be utilized.
Abstract: Method measures imperfections in the digital quadrature demodulator from the amplitude of the output signal of the demodulator quadrature mixer, i.e. from the amplitude of a vector formed by the I and Q channels, are taken, at a rate based on a symbol clock of the demodulator, numerous momentary samples; a direction angle of the demodulator output signal vector corresponding to the samples is divided, on the basis of the voltages of the I and Q channels, into different direction angle sectors; and direction angle sectors or from a nominal value are calculated the magnitudes of the distortions in the demodulator operation. The method advantageously also includes a step wherein the measurement results of the imperfections in the demodulator operation are used for adjusting the operation of the demodulator by generating feedback loops, which correct all the imperfections simultaneously in an iterative manner.
Abstract: A method of compensating delay in an linearization loop of a power amplifier and a linearization arrangement of a power amplifier, which arrangement includes an I/Q modulator, one or more power amplifiers to be linearized and generating delay, and a feedback loop including an I/Q demodulator when the I/Q modulator and the I/Q demodulator derive an oscillator frequency from the same local oscillator. In accordance with the invention, the delay generated the power amplifier in the feedback is compensated by delaying a local oscillator signal applied to the I/Q demodulator. The delay of the local oscillator signal applied to the I/Q demodulator is generated by an amplifier optimized to have a great delay, preferably by a small-signal amplifier.
Abstract: The invention relates to high speed data transmission in digital mobile communication systems. In multichannel data transmission, a single data connection is allocated a plurality of parallel traffic channels (Ch1, Ch2, Ch3) via which the data units (1, 2, . . . , n) are transferred. At the transmitter (Tx), the data units are provided with a numbering by means of which the receiver (Rx) is able to restore the transmission sequence of the data units received via the different traffic channels. If the length of the data units varies to a great extent or is small in relation to the transmission delay tolerance of the traffic channels, the number space of the data units must be large for the receiver to be able to restore the data unit sequence. An increase in the number of numbering bits signifies a lower efficiency for the transfer. In at least embodiment of the invention, short data units are concatenated in data blocks (I and II) each of which is transmitted as an entity via the traffic channel.
Abstract: The invention relates to a synchronous data transmission when the maximum data rate of the traffic channel equals one of the user data rates at the terminal interface. Such a situation may occur for example when a satellite system is connected as a base station system to a mobile system. A mobile station (MS) inserts the terminal interface status information (STATUS) in the redundant parts (REDUNDANT) of the protocol data units (PDU) of the transmission protocol used at the terminal interface and transmits the protocol units through a satellite traffic channel to a land earth station (LES). The land earth station (LES) is arranged to extract said status information from the protocol data units and to restore the original redundancy to the protocol data units.
Abstract: The invention relates to a cellular packet radio. network and to a method for updating a routing area in a packet radio network. Packet radio support nodes (SGSN) are connected to a digital cellular radio network (BSS), which provides a radio interface for the support nodes for packet-switched data transmission between the support nodes and mobile stations. There is a logical link between a mobile station (MS) and a serving packet radio support node (SGSN). The packet radio network utilizes logical routing areas, each of which comprises one or more cells. Each cell broadcasts information on the routing area to which it belongs. The mobile station sends a routing area update request to the packet radio network when it roams to a new cell which belongs to a different routing area than the old cell. The update request includes the identifiers of the old and new routing area.
Abstract: The present invention generally relates to data transmission services in mobile communication systems. A mobile subscriber may typically be entitled to different kinds of tele and bearer services. Presently, each user data rate is an independent bearer service. This means that there is a vast number of bearer services, which causes problems for both the network operators and the mobile subscribers. According to the invention, the number of bearer services is reduced by defining the bearer service to cover several data rates, and by negotiating, at the call set-up stage, the data rate to be used by the data call in the bearer service between the mobile station (MS) and the mobile communication network (MSC). The next step is to negotiate the data rate between the mobile communication network (MSC) and the fixed network, such as PSTN or ISDN. Then, if required, the data rate of the mobile communication network and the radio channel resources are adapted to the data rate used towards the fixed network.
Abstract: A method of directional radio communication between a first station (6) and a second station, comprising the steps of defining at the first station (6) a plurality of beam directions (b1-b8) for transmitting signals to said second station, each of said beam directions being selectable. A plurality of beam directions are selected at said first station in which a signal is to be transmitted form said first station to said second station. Said signal i transmitted in said plurality of beam directions, whereby the power level of the signal transmitted in each of said selected plurality of beam directions is individually selectable.
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).
March 17, 1999
Date of Patent:
October 28, 2003
Nokia Telecommunications Oy
Marko Silventoinen, Harri Posti, Harri Jokinen, Jari Ryynänen
Abstract: A method and a transmitter (100) and a receiver (102) for transmitting messages (114) in a digital telecommunications system. The information (104) to be sent is encoded in an information encoder (106) of the transmitter (100) into frames that are transmitted via a transmission path (108) to the receiver (102). A good state and a bad state have been defined for the frames, and a bit pattern corresponding to each message (114) has been defined. The messages(114) are encoded with a message encoder (116) of the transmitter (100) and transmitted to the receiver (102). The messages (114) are transmitted together with the information (104) via a common transmission path (108), inserting the bit pattern corresponding to the message (114) in the frame, forming the frame corresponding to the time of transmitting the message (114) as bad, and in short sequences, preferably only one frame at a time.
Abstract: A method and arrangement for calculating correlation between a first and second code sequence, which comprise a number of samples and have a finite length is disclosed. The arrangement comprises an assembly for estimating the delay between the code sequences and an assembly for setting the codes to a desired phase with respect to each other on the basis of the delay between the code sequences by rotating the first sequence. To allow correlation to be calculated quickly and simply, the arrangement includes an assembly for comparing the sequences with each other in parallel mode sample by sample and an assembly for adding the results of the sample-specific comparisons together.
Abstract: In a mobile communication system, signals which are transmitted from mobile stations moving relative to a base station are subject to a Doppler effect. A technique is described for compensating for that Doppler effect by using estimated bit decisions for received bits which are sufficiently close to a zero phase offset point so as not to have been corrupted by the Doppler effect. The Doppler shift measured using these estimated bits can then be applied to bits of the signal which are further away from the zero phase offset point.
Abstract: In a digital mobile communication system, a packet radio system has been implemented by employing the radio interface of the mobile communication network. The packet radio system comprises packet radio support nodes (SGSN) connected to the mobile communication network, as well as gateway support nodes for providing an inter-connection to an external packet data network (15). The support nodes (SGSN, GGSN) are connected to an intra-operator packet switched backbone network (13). The serving support nodes and the gateway support nodes collect charging information on usage of the radio interface and the data network (15), respectively. The system is further provided with a billing gateway support node (BGGSN) connected to the internal backbone network (BGGSN) to receive user-specific charging information collected by the other support nodes, and to forward the charging information to a charging system.