Abstract: A radio base station suitable for performing a handover operation for a LTE-variant of a radio access network comprises a transceiver and a status report requester. The transceiver is configured to facilitate wireless transmission between the radio base station and a wireless terminal over an air interface, including transmission of a radio link bearer for the connection over a downlink from the radio base station to the wireless terminal. The status report requester is configured to determine, according to one or more pre-defined criteria, whether to request from the wireless terminal a status report for a radio bearer prior to the radio base station transferring user data for the connection to another radio base station in conjunction with a handover.

Abstract: An access node in the boundary area of a single frequency network service area transmits a boundary indication to the mobile terminals in the boundary area to notify the mobile terminals that they are approaching the boundaries of the single frequency network. The mobile terminals receiving the boundary indications may then take steps to maintain continuity of broadcast services when the mobile terminals leave the service area of the single frequency network.

Abstract: A method is provided in a base station for handling a request from a first user equipment for accessing a service in a radio communications network. The method comprises the steps of receiving a first time interval of an incoming signal comprises a first signal sent from the first user equipment and a second signal sent from the second user equipment, interpreting the first signal as being a possible service access request message preamble, and sending an acknowledgement, that the preamble is detected, to the first user equipment. The method comprises the further steps of delaying the first time interval of the incoming signal, identifying the second signal in the first time interval of the incoming signal during the delay, washing the identified second signal away from the first time interval of the incoming signal during the delay, and deciding whether the possible preamble is a real preamble or not, by analyzing the washed incoming signal.

Abstract: The invention relates to a method in a radio base station and user equipment, and comprises varying the transmitted timings of the HARQ feedback signalling such that only users with orthogonal pre-coding vectors (W) are scheduled simultaneously, to reduce multi-user interference and to ensure that said signalling is received by a transmitter before the start of the next retransmission.

Abstract: The present invention relates to methods, a user equipment and a radio base station in a communication network, in which a downlink out-of-coverage is detected based on measurements done on a common channel or on the combination of common and dedicated channels. The out-of-coverage is then reported to the network, either using resources proactively assigned to the user equipment, or by transmitting a predetermined pattern of signature sequences assigned to the user equipment.

Abstract: When a high SIR can be achieved for downlink data transmission, for example in a MIMO system, or when higher order modulation, such as 64 QAM, can be used, it is desired to measure the instantaneous downlink channel quality indicator (CQI), and report the measured CQI to the network using the same number of bits as when a lower SIR can be achieved. In order to do this, a true CQI is derived based upon at least one network controlled parameter and a measured channel quality parameter; and the true CQI value is scaled to a new CQI value such that the new CQI will fall within a specified range of CQI values; so that the new CQI achieved by scaling the derived CQI value can be reported with every CQI value over the entire reporting range requiring the same number of bits.

Abstract: The present invention relates to a link layer control protocol implementation in a communication system. To improve operative efficiency of the link layer control protocol implementation it is suggested to delay issuance of a retransmission request for a missing data unit during a retransmission delay time period. Therefore, according to the present invention a retransmission request is not issued immediately upon detection of a missing data unit. Therefore, the present invention avoids issuance of false alarm for the missing data unit when it is received during the retransmission delay period.

Abstract: A method for use in a cellular system comprising a plurality of base stations with corresponding cells, in which system the communication between users in a cell and the base station is divided into an up link period and a down link period, the method comprising letting a controlling node instruct the base stations regarding: a first point in time when the base station should start transmitting a control signal; a second point in time when the base station should start to listen for control signals from other base stations and measure their time of arrival and signal strength; a third point in time when the base station should cease listening for control signal; and a fourth point in time when the base station should transmit the measurements results to a receiving node in the system.

Abstract: Method and arrangements for scheduling transmission resources in a first node in a cell comprised within a wireless communication network. The first node is arranged to communicate over a communication channel with at least one user equipment within the cell. The communication is made by using a frame comprising uplink resources and downlink resources with a switching point between the downlink resources and the uplink resources. The method comprises the step of obtaining a parameter referring to the expected transmission quality of the communication and/or the expected coherence properties of the communication channel. The method also comprises scheduling a transmission on an uplink or downlink resource. The resource is located on a time distance from the switching point. The time distance is based on the obtained parameter.

Abstract: A device system, computer medium and method for calibrating at least one impairment of a signal transmitted from a transmitting unit to a receiving unit, the method including receiving at the receiving unit at least two signals transmitted from the transmitting unit, estimating at the receiving unit, based on the received at least two signals, at least one parameter associated with transmit chain links between the transmitting unit and corresponding antennas of the transmitting unit, collecting the at least one parameter in a measurement report at the receiving unit, and transmitting the measurement report from the receiving unit for correcting the at least one impairment based on the at least one parameter.

Abstract: The present invention relates to a method and arrangement for switching between different modes in a communications network. The network comprises a number of transmit and a number of receive antennas, said modes comprising a single user mode and a multiple user mode. The method including the steps of: transmitting reference signals or predetermined sequences corresponding to both said modes comprising respective weighting matrices for said modes during a preparation phase, which comprises of one or more transmission time intervals (TTI), transmitting on a common channel, signalling information indicating start and duration of said preparation phase to all receiving equipments in a reception area.

Abstract: The present invention relates to a method and arrangement for providing a reliability information on information bits (bk) transmitted in a communications network, said bits constituting a transmitted vector (s) comprising elements selected by a transmitter from finite alphabet (S), wherein said transmitted vector is detected from an observed vector received symbols (y) providing a log-likelihood (L). Thus, the approximation is done by defining a number of bit terms having constant size and selecting a subset of bits and marginalizing over a selected part of said subset of bits.

Abstract: A method of seeking in a rich media stream provided from a multimedia server to at least one multimedia client, wherein the method may be executed in an encoder of a multimedia server or a decoder or a multimedia client. A seeking instruction is inserted into the media stream at time instance X, comprising an offset time instance Y, in order to be used for seeking at a global time rate. A method for enabling synchronisation in a rich media stream wherein the synchronisation is based on a global timeline is also provided.

Abstract: The invention relates to methods and arrangements for an event triggered DRX cycle adjustment. A user equipment located in a serving cell of a mobile communications network monitors downlink communication at predetermined time intervals when operating in discontinuous reception mode. The user equipment also performs communication parameter measurements regarding at least one of the serving cell and one or more neighbor cells. After the occurrence of a first event, the user equipment sends at least one of measurement data and a first event report to the network. The sending is triggered by the occurrence of the first event. The monitoring is caused to be performed at shortened time intervals after the occurrence of a second event, wherein the second event is defined to indicate a higher probability of receiving a handover command than the first event.

Abstract: An entire radio transceiver can be completely integrated into one IC chip. In order to integrate the IF filters on the chip, a heterodyne architecture with a low IF is used. A single, directly modulated VCO is used for both up-conversion during transmission, and down-conversion during reception. Bond-wires are used as resonators in the oscillator tank for the VCO. A TDD scheme is used in the air interface to eliminate cross-talk or leakage. A Gaussian-shaped binary FSK modulation scheme is used to provide a number of other implementation advantages.

Abstract: Control is exercised over a tap connection made for law enforcement agency monitoring of mobile station communications in response to an inter-exchange hand-off. Where such a tap connection does not yet exist at hand-off, pre-hand-off actions taken at the target exchange trigger an analysis of whether a party to that communication is marked for monitoring followed by an establishment of the tap connection at hand-off if the party is so marked. If the tap connection is already in place, pre-hand-off actions taken at the target exchange trigger an analysis of whether law enforcement agency monitoring of that communication is lawfully authorized with respect to the target exchange followed by instructing the anchor exchange to terminate the tap connection at hand-off if monitoring is not lawfully authorized.