Nokia Corporation

Nokia Telecommunications Oy

Nokia Networks Oy

Riku P Pirhonen

Antti Anton Toskala

Harri Holma

Pekka A Ranta

Jyri Suvanen

Thomas Aloysuis Sexton

Heikki Paivike

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 &#xbd; 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.

Data transmission method

A radio system and a channel allocation method in a radio system are provided. The radio system and method have at least one base station communicating with terminals within a coverage area thereof. Air interface resources are allocated to different terminals with a combined time and code multiple access method such that the signal of one or more terminals is transmitted in each time slot. Terminal signals are grouped into different time slots based on connection characteristics of each terminal.

Channel allocation method and radio system using a combination of TDMA and CDMA

In mobile communications systems of the CDMA type in particular detection of individual signals from the received common signal with known methods requires much processing capacity of the mobile communications system. The present invention concerns a method of reducing radio inter-ference in a mobile communications system including at least one base station (BS) and several mobile stations (MS). The mobile communications system uses several traffic channels for communications between the base station (BS) and the mobile stations (MS). The method according to the invention is characterized in that signals received at the same reception point are classified therein into at least two classes according to the interference tolerance of the signal or according to the interference caused by the signal to other signals and/or according to the complexity of decoding of the signal, a special way of functioning is defined for each class, whereby the total interference caused by received signals to one another is reduced by complying with these ways of functioning, and the individual signals of each class are processed at the point of reception in the way of functioning defined for the class in question.

Reducing interference in a mobile communications system

Apparatus, and an associated method, for a UWC-136 HS communication system is provided. A synchronization signal generated by the network infrastructure, constructed generally corresponding to the existing IS-136/136&plus; standard is received by a mobile station operable, generally, pursuant to the timing scheme defined in a GSM system. A relative timing offset between the timing schemes of the respective communication system schemes is determined and thereafter utilized for purposes of synchronization.

Multi-mode mobile apparatus and method for calculating frame/time slot offsets, and allowing mobiles to synchronize with different mobile protocols/schemes

A method, and associated apparatus, predicts the likelihood of successful effectuation of handover in a cellular communication system. Handover is permitted only if the predicted likelihood is at least as great as a minimum threshold. If the predicted likelihood is less than the minimum threshold, a request is made to increase the coding rate of control signals used pursuant to the handover procedure. Handover is permitted only when the likelihood of success is predicted to be high. Thereby, the possibility of loss of communications during handover procedures is reduced.

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Coppell, TX, United States of America

Riku P Pirhonen