Abstract: A method of selectively improving the quality of calls carried by a communications network. The method comprises defining off-peak and peak call periods, and during off-peak periods, for each call carried by the network, analysing call data to determine whether or not a network based Voice Quality Enhancement function should be applied to the call and, if yes, applying the function to the call. A database is maintained containing subscriber and/or terminal identities together with respective Voice Quality Enhancement function requirements, said requirements being updated based upon determinations made during said off-peak periods. During peak periods, said network based Voice Quality Enhancement function is invoked on a per call basis in dependence upon the requirements contained in said database for the user(s) and/or terminal(s) participating in the calls.

Abstract: A method and device for compensation of received signal components at a user equipment (UE) used for receiving signal components from a radio base station (RBS). The signal components have at least a first and a second polarization orientation, respectively. The intended reception of the signal component (Yh(n)) having the first polarization deviates from the polarization orientation of the transmitted signal component (Xh(n)) having the first polarization by a first angle (?), and the intended reception of the signal component (Yv(n)) having the second polarization deviates from the polarization orientation of the transmitted signal component (xv(n)) having the second polarization by a second angle (?). The method comprises the steps: determining the correlation values (Ryvv, Ryvy, Ryyv, Ryyy) for the received signals (Yh, Yv) at a first time (k) and a second time (m); using these values to determine the deviation angles (?, ?) performing said compensation using the deviation angles (?, ?).

Abstract: A method of controlling access in a telecommunication network in which a communication medium, such as a set of frequencies, time slots, or codes, is shared among a plurality of mobile units. Transmissions from the mobile units utilize different access modes, such as a direct access mode and a scheduled access mode. Additionally, the transmissions are divided into different communication types, each having an associated priority. A mode access control unit determines for each priority, which access mode to utilize for the associated communication type. Mobile units having data to transmit access the shared communication medium utilizing the access mode determined for the priority of the communication type to which the data belongs.

Abstract: The present invention relates to a cellular communications network and in particular to the problem of identifying cells for neighbor lists, or handover candidates when the cells are identified by a limited number of non-unique identities. The present invention includes a method for a radio base station, wherein the base station receives reports from one or more terminals in neighbor cells quality and non-unique identities. The match is sought in a neighbor cell list non-unique identity with a unique cell identity. If the match cannot be made without ambiguity, the base station causes the terminal to detect the unique cell identity. If the reason for the ambiguity is the particular cell is not included in the neighbor cell list it is included when its unique identity has been established. The uniquely identified cell is used if it is determined to perform a handover.

Abstract: The present invention relates to an array antenna arrangement comprising at least two antenna sub-arrays and at least one antenna element in each antenna sub-array. The array antenna arrangement is adapted for calculation of a total covariance matrix (R) of a received signal vector (x). The array antenna arrangement further comprises at least one switch, where the number of switches corresponds to the number of antenna elements in each antenna sub-array. Each switch is connected to a respective radio chain, and is arranged to connect the antenna elements of a respective corresponding antenna sub-array to the respective radio chain cyclically. At least one full switch cycle, comprising a set of received signals for each switch configuration, is carried out for a calculation of the total covariance matrix (R). The present invention also relates to a corresponding method.

Abstract: A method and a device for initiating the bypassing of a pair of transcoding operations that are performed in series by a first transcoder arranged together with a first communication terminal on a local side of a communication network and by a second transcoder arranged together with a second communication terminal on a distant side of the communication network are described. The method includes receiving from the distant side information about an encoding format currently in use on the distant side and about encoding capabilities of the distant side and transmitting to the distant side information about an encoding format currently in use on the local side and about encoding capabilities of the local side to enable on one or on both sides a change of the encoding format currently in use prior to initiating the bypassing of the transcoding operations.

Abstract: A radio network entity in charge of outer loop power control for a communication with a mobile radio is informed about erroneous data units, requested retransmissions, and/or data units transmission attempts associated with the data units sent by the mobile radio to the radio network. Another radio network entity, which sends a transmission power control signal to the mobile radio to control the mobile's transmit power level based on a target value, detects errors in data units received from the mobile radio and requests retransmission. Information associated with the requested retransmission is used to generate a revised target value. The target value may be revised by an outer loop power controller node or by an outer loop power controller entity in the same node as an ARQ entity that generates the information about erroneous data units, requested retransmissions, and/or data units transmission attempts associated with the data units sent by the mobile radio to the radio network.

Abstract: The present invention relates to an arrangement, in a communication network system supporting communication of packet data. It comprises/has access to mobile subscriber data and comprises means for handling subscriber identity information. It further comprises service level control means (61,62;6) for allocating service level profiles, e.g. QoS profiles, to subscribers. Said services level control means (61,62;6) comprises profile configuration means, for defining network service level profiles (7) and linking subscriber identity information entities to said network service profiles defining the highest allowed service levels at least for a number of different parameters at least for groups of subscribers identified by said subscriber identity information entities.

Abstract: A signal-power related quantity is estimated by repeating a processing step, where measured values of instantaneous signal powers are processed. At each relevant part step of the processing and for each relevant matrix (99), elements (98) that are indicated to be negligibly small are changed to instead be exactly equal to zero. The computational complexity can thereby be decreased considerably. The principles are applied on determination of signal-power related quantities in wireless communications systems.

Abstract: A phase locked loop frequency synthesizer with jitter compensation having a tapped delay line for compensating the jitter prior to passing a signal subject to jitter through a non-linearity; and, a ?? modulator for generating, or a storing element for pre-generated storing, of a fractional pattern representing fractional weighting of a plurality of integer divisors, wherein the fractional pattern identifies one integer divisor, out of the plurality of integer divisors, at a time to be active.

Abstract: A method and system for enabling a mobile station (MS) to transfer from one Network Address Translation (NAT) domain to another NAT domain. Dynamic rules created in the first NAT domain are transferred to the second NAT domain via a first Media Policy Routing function. A tunnel is created between the second NAT domain and the first MPR for transferring a MS session. A new session from the MS is created outside the tunnel and once the MS session times out, the MS session, the states existing in the first MPR and the second NAT domain utilizing a new set of dynamic NAT rules created in the second NAT domain are all removed. The tunnel is then removed and communication via a second MPR and the second NAT domain is available.

Abstract: The present invention relates to balanced power amplifier network in combination with outphasing techniques such as Chireix. The object of the present invention is to provide a solution to the problem to combine balanced amplifiers like the current mode class D (CMCD) or class E/F with a LINC network. The main problem is that some power amplifiers have balanced output and the LINC network is single-ended so that a high power low loss transformer that works at several impedance levels is needed, which is hard to realize at cellular frequencies.

Abstract: The invention relates to traffic handling in multi-access communication systems (100). A network-level solution is proposed, in which the access networks (20) provide a network-based ATC server (61) with access-related information comprising measured performance parameters. The ATC server may also receive information from the multi-access terminal (10), e.g. about available access networks. The ATC server coordinates the information and uses it for adaptive traffic control calculations. This typically involves continuously executing an adaptive traffic control algorithm for reaching predetermined control objectives. The control algorithm tracks the reference values and outputs a feedback control signal that is sent back to the user devices. Based on the feedback control signal the multi-access terminals spread their traffic over the available access networks.

Abstract: Method of estimating Doppler spread comprising the steps of estimating a de-biased value according to the relation Formula (I), is a preliminary Doppler spread squared, based on measured parameters, and K2 is a constant.

Abstract: Method and apparatus for reducing phase noise from a multi-carrier modulation (MCM) system, such as an orthogonal frequency division multiplexing (OFDM) system, by transmitting known data on a sub-carrier at a power level adapted to allow for accurate estimation. Preferably, the sub-carrier is the DC sub-carrier.

Abstract: A method and apparatus for detecting a cell identification (ID) by determining the number of transmit (TX) antennas used for transmission; applying at least two codes to the reference symbols (RSs) transmitted from the TX antennas, to determine a set of de-coded RSs; in the event it is determined that there is more than one TX antenna used for transmission, grouping the de-coded RSs from the TX antennas and summing the de-coded RSs within the group; equalizing the grouped de-coded RSs; and determining the code of the at least two codes that gives the maximum correlation so as to obtain the cell ID.

Abstract: A method for closed loop link adjustment based on a Request To Send-Clear To Send (RTS-CTS) channel access scheme includes the following steps. Designating a station as an originating station. Transmitting a RTS frame with predetermined transmit power from an originating station, prior to an intended DATA transmission, sounding the channel such that reception characteristics can be evaluated at a designated receiving station. Transmitting, in response to the originating station, a CTS frame with a predetermined transmit power from the receiving station with directives of link adjustments. Transmitting a DATA frame from the originating station to the receiving station frame complying with link adjustment directives to the extent of the originating stations capabilities. And, transmitting an acknowledge (ACK) frame in response to the originating stations from the receiving station indicating result of DATA frame reception.

Abstract: The present invention relates to multicast communication systems and in particular to the implementation of a random access uplink channel, which can be used, e.g., for transmission of acknowledgement messages for received data. In order to prevent frequent collisions on said channel, the transmission of acknowledgement messages is spread at least over time or, additionally, with regard to another distinguishing channel property, e.g. a RACH sub-channel or RACH-signature.

Abstract: The present invention relates to communications. More especially it relates to communications over radio links subject to fading or otherwise intermittently unreliable. Particularly it relates to high data rate communications and combinations of conventional and opportunistic communications within a communications system.

Abstract: A simple and reliable method for dimensioning CDMA based networks is achieved by a method for evaluating or dimensioning a radio network comprising the steps of—defining a radio network model comprising at least one radio base station and a plurality of mobile terminals, —for each mobile terminal in the model, defining a path gain value for a signal path between the mobile terminal and each of the radio base stations, said method being characterized by the steps of—for each mobile terminal, selecting at least one of said path gain values, —defining a data set comprising at least one parameter based on said selected at least one path gain value for each mobile terminal, and—performing dimensioning calculations on the data set. Especially if data sets are prestored the dimensioning calculations can be carried out in very short time.