Abstract: In order to effect link adaptation in a mobile communication network employing the parallel transmission of a plurality of transport channels, transport format combination commands and link quality reports are carried in transport channels which may be dedicated to these functions.

Abstract: The invention relates to a method, a system and a computer program product for bit swapping, wherein periodically I successive bits of a data packet that comprises K bits are mapped onto interleaved bit positions in I different bursts, respectively, according to a predefined interleaving scheme and a selected interleaving depth I, comprising the step of swapping the value of at least one bit that is associated with a respective first bit position m in the data packet with the value of a bit that is associated with a respective second bit position n in the data packet, wherein the respective second bit position n is selected such that n>m holds and that the difference n?m is divisible by I.

Abstract: A method is presented for enhancing pre-synchronization reliability in a cellular radio system. At least one base station in the cellular radio system is arranged to transmit at least two such transmissions (350, 351; 360, 361; 370, 371; 380, 381) that are usable for mobile stations in pre-synchronization. Said two transmissions are relatively close to each other in succession and they are timed to occur approximately at a time when there is a temporary idle period in an active communication connection between a mobile station and a base station.

Abstract: The invention relates to a method, a system and a computer program product for bit swapping, wherein periodically I successive bits of a data packet that comprises K bits are mapped onto interleaved bit positions in I different bursts, respectively, according to a predefined interleaving scheme and a selected interleaving depth I, comprising the step of swapping the value of at least one bit that is associated with a respective first bit position m in the data packet with the value of a bit that is associated with a respective second bit position n in the data packet, wherein the respective second bit position n is selected such that n>m holds and that the difference n−m is divisible by I.

Abstract: The present invention relates to the transference of signaling frames on GERAN (GSM/EDGE radio Access Network) half rate channels utilizing a modulation scheme carrying n bits in one symbol. In order to be able to utilize the existing channel coding developed for channels with different modulations and to avoid high rate convolutional and block codes, the AMR signaling frame to be transferred is coded using a coding procedure defined for a GSM half rate channel utilizing a GMSK modulation scheme, the coding procedure outputting a coded output stream. In response to said coding, each bit of the coded output stream is repeated n times, whereby a repeated bit stream is obtained, and symbols to be transmitted are formed from the repeated bit stream.

Abstract: In the LAPDm a short message service is implemented by pre-emption of every second signalling message when there is a short mesa sage to be sent. Same pre-emption mechanism is also needed when the RLC/MAC protocol is used on the data link layer instead of the LAPDm. The mechanism is provided by defining at least two different identities to be used with frames transmitted on the signalling channel; and pre-empting frames on the MAC at least on the basis of the identity relating to a frame. The identities are preferably identified on the basis of the signalling radio bearer of the frame.

Abstract: A communications system comprising a first station capable of communication with a second station over a wireless channel, data being carried over the wireless channel in superframes, each superframe comprising a plurality of frames and each frame comprising a plurality of timeslots; the system having: a first mode of operation in which a full rate data channel for circuit switched communications is defined by the allocation to that data channel of corresponding time slots in each frame; a second mode of operation in which two half rate data channels for circuit switched communications are defined by the allocation to each of those data channels of an equal number of corresponding time slots of frames in each superframe; and a third mode of operation in which four quarter rate data channels for circuit switched communications are defined by the allocation to each of those data channels of an equal number of corresponding time slots of frames in each superframe.

Abstract: The invention relates to a method for improving the quality of control signalling based on signalling messages controlling speech or data transmission over an air interface between at least two radio terminals of a radio communications system, said speech or data being transmitted in at least one traffic channel of said radio communications system, and said signalling messages being transmitted in control channels associated with said at least one traffic channel. In order to allow for an improved performance of SACCH and FACCH, it is proposed that a first and a second signalling message with identical content are transmitted in two separate associated control channels. Alternatively, it is proposed that a signalling message included in a single ACCH is coded with a stronger coding. The invention relates equally to corresponding radio terminals and modules for such units.

Abstract: A method for rate matching in equipment used as part of, or in communication with, a radio access network implementing FLO (Flexible Layer One) so as to provide retransmission with incremental redundancy, the method using a rate-matching algorithm based on determining a starting parameter eini, the method characterized by: a step (21) of providing a retransmission parameter R controlled by the RLC protocol layer and having typically a value of one for a first retransmission and a next higher value for each subsequent transmission; a step (24) of determining a characteristic distance D related to the average distance between either punctured bits or between transmitted bits, depending on the value of the average distance between punctured bits; and a step (25) of determining a new value of eini based on a cycling term having a value depending on R but modulated by D so as to never exceed D−1.

Abstract: A method is disclosed for operating a wireless TDMA communications system. The method includes steps of monitoring a propagation delay of a mobile station; and when the propagation delay exceeds a predetermined limit, changing by a time slot unit a value of one or both of Tta1 and Ttb1, wherein Tta1 is a minimum number of time slots allowed between the end of a last, previous receive time slot and a first, next transmit time slot, when a channel measurement is to be performed in between, and wherein Ttb1 is a minimum number of time slots allowed between the end of a last, previous receive time slot and a first, next transmit time slot.

Abstract: In a mobile communication system employing heterogeneous interleaving schemes, rate matching is employed to reduce the radio block data payload demands of data blocks to accommodate diagonal interleaving of preceding data blocks.

Abstract: In a mobile communication system employing the concept of transport channels in a medium access control layer, the transport channels are combined and then subject to an interleaving process

Abstract: A method and apparatus are provided for transmitting packets across a radio access network. This may include identifying a first part of a packet and a second part of the packet and classifying one of the first part and the second part as being more important than the other part. This may further include transmitting the more important part of the packet differently than the less important part of the packet.

Abstract: A method (800) for transmitting certain first data and certain second data, which method comprises the steps of: channel coding the first data resulting in coded first data, interleaving a first part of each piece of coded first data over a certain first part of certain first radio bursts and a second part of each piece of coded first data over a certain second part of certain second radio bursts, where the first part is different from the second part, transmitting the first part of the first piece of coded first data using certain third radio bursts, which are the first radio bursts related to the first piece of coded first data, transmitting the second part of the last piece of coded first data using the second part of certain fourth radio bursts, which are the second radio bursts related to the last piece of coded first data.

Abstract: A method of transmitting inband signaling messages in a mobile telecommunications network using SACCH burst. In order to avoid puncturing a fixed amount of bits out of every SACCH burst for inband signaling, the 40-bit FIRE code of the SACCH is replaced with a shorter CRC code, thereby creating unused bits for carrying the messages. After the SACCH block is shortened, a plurality of dummy bits are inserted into the shortened block prior to applying a ½ convolutional code to obtain the coded block. The coded block is further interleaved, reordered and mapped into 4 SACCH bursts. The dummy bits in each SACCH block are then replaced by the inband signaling for transmission.