Abstract: The present invention relates to a method and a system for initiating bi-directional communication in a time-division duplex (TDD) communication system between a customer premises equipment (CPE) modem, such as a DSL modem, and an operator modem, such as a DSLAM. The invention is characterized in that the transmission of the CPE modem is aligned with the time-division duplex timing structure present in received crosstalk noise when transmitting initiation signals, so-called handshake tones.

Abstract: The present invention relates to a small-cell antenna arrangement. The antenna arrangement comprises an antenna mounting unit and an active antenna element. The antenna mounting unit is arranged with fastening means from which the active antenna element is detachable. Further, the antenna mounting unit is arranged with a signalling interface via which signals are arranged to be transferred between the active antenna element and a remotely located base station with which the antenna arrangement communicates. Moreover, the antenna mounting unit is arranged with an interface via which the active antenna element is powered.

Abstract: Disclosed is a method performed by a base station (200) in a wireless communication system for controlling communication resources to a plurality of antenna sites (231, 232, 233, 234) of the base station, the base station providing communication resources as a number of antenna carriers providing IQ data flows (IQ1, IQ2, IQ3) to the plurality of antenna sites. The method comprises: estimating (302) traffic load on individual of the plurality of antenna sites (231, 232, 233, 234), and distributing (312) the number of antenna carriers to the plurality of antenna sites based on the estimated traffic load on individual of the plurality of antenna sites.

Abstract: Method and transmitting node for adjusting transmission over xDSL lines connected to the transmitting node. The method involves transmitting (1006) a first signal A1 on a first line (304), and transmitting (1008) a second signal A2 on a second line (306), the second signal A2 being related to the first signal A1. The method further involves adjusting (1010) the transmission of the second signal A2 on the second line (306), such that a contribution from the second signal A2 interferes constructively with a signal A1? at the second end (304:2) of the first line (304), where the signal A1? represents the signal A1 having propagated through the first line.

Abstract: Transceiver node and method therein for enabling dynamic bandwidth assignment in bi-directional Time Division Duplexing (TDD) multicarrier communication over wire lines. The transceiver node is operable to be coupled to a plurality of loops, wherein each loop is terminated by a respective network terminal (NT). The method comprises collecting traffic reports from local and remote queues associated with uplink and downlink traffic on the plurality of loops, and determining an actual demand for upstream and downstream bandwidth, respectively, for each of the plurality of loops, based on the collected traffic reports. The method further comprises deriving an Upstream/Downstream (US/DS) frame partitioning based on the determined actual demand for upstream and downstream bandwidth, and providing an indication of the derived US/DS frame partitioning to the NTs. NTs are then scheduled in accordance with the derived partitioning.

Abstract: There is provided mitigation of disconnect events in a vectoring based digital subscriber line, DSL, system. A method performed by a digital subscriber line access multiplexer,DSLAM, comprises detecting a loss of signal or disconnect event of a line in a vectored group of DSL lines,the loss of signal or disconnect event causing a negative impact on the DSL system. The method further comprises detecting a change in at least one downstream, DS, crosstalk coefficient of at least one line in said vectored group of DSL lines. The method further comprises determining a magnitude of said change. The method further comprises determining where the loss of signal or disconnect event has occurred by processing precoding coefficients of the vectored group of DSL lines. The method further comprises determining,on basis of the determined magnitude and where the loss of signal or disconnect event has occurred, an action to be performed by the DSLAM so as to mitigate for said negative impact.

Abstract: Presented are methods and arrangements for adapting the load in a cell based on information on upcoming events related to a backhaul link. The upcoming events related to the backhaul link may be delayed in order to give enough time for an RBS to complete activities related to the load adaptation. Thus, UEs may be handed over to neighboring cells proactively, before the cell becomes overloaded due to events related to the backhaul link.

Abstract: When data retransmission is used to handle errors caused by impulse noise, buffer memory requirements may be reduced and/or data rate increased by detecting impulse noise at the transmitting equipment and initiating retransmission in response to such detection rather than waiting for a retransmission indication from the receiving end. The decision to retransmit may be made dependent on the strength or other properties of the detected noise burst. The decision criterion may be made adaptive by correlating noise burst properties with received retransmission indications or the absence thereof.

Abstract: It is presented a method for assisting the determining of a position of a wireless device, the method being performed in a network node connected to a plurality of remote radio head devices via a combiner. The method comprises the steps of: receiving an uplink signal via the combiner; comparing a carrier frequency of the uplink signal with a set of manipulation schemes for a carrier frequency of uplink signals, wherein the manipulation schemes are different for at least some of the plurality of remote radio head devices; and providing a proximity indication that the position of the wireless device is in the vicinity of a remote radio head device the frequency manipulation scheme of which best matches the uplink signal. A corresponding network node, computer program, and computer program product are also presented.

Abstract: A method is provided performed by an access point for handling uplink communication in a communication system comprising the access point and a wire line network node connected via wire line to the access point. The method comprises receiving an encrypted and/or integrity protected packet data unit, PDU, from a user equipment (UE) wirelessly connected to the access point and detecting type of the received PDU, the type of PDU being any of a signaling radio bearer type or a data radio bearer type. The method further comprises encapsulating the received PDU by setting a header to the PDU, which header comprises an identity indicating the detected type of PDU and an identity indicating a source address and/or a destination address of the PDU, and sending the encapsulated PDU to the wire line network node. Provided is also a corresponding method performed in the wire line network node.

Abstract: Method and arrangement in a Vectoring Control Entity, VCE, for handling disorderly events in a Digital Subscriber Line, DSL, system. The method involves a number of actions, to be performed when a disorderly event occurs on line m in a vectored group of DSL lines, and the transmission on line m is continued. The method comprises obtaining error samples from Customer Premises Equipments, CPEs, connected to other lines in the vectored group of DSL lines. The method further comprises—calculating an estimate of the channel coefficients changed due to the disorderly event, based on the error samples, thus providing a partial channel estimate. Further, the method comprises—modifying a downstream precoder, at least partly based on the partial channel estimate, such that retraining the other lines in the vectored group due to the disorderly event is avoided. The arrangement is adapted to enable the performance of the above described method.

Abstract: Method and arrangement in a Vectoring Control Entity, VCE, for handling disorderly events in a Digital Subscriber Line, DSL, system. The method involves a number of actions, to be performed when a disorderly event occurs on a line m in a vectored group of DSL lines, and the transmission on line m is continued. The method comprises obtaining error samples from Customer Premises Equipments, CPEs, connected to other lines in the vectored group of DSL lines. The method further comprises—calculating an estimate of the channel coefficients changed due to the disorderly event, based on the error samples, thus providing a partial channel estimate. Further, the method comprises—modifying a downstream precoder, at least partly based on the partial channel estimate, such that retraining of the other lines in the vectored group due to the disorderly event is avoided. The arrangement is adapted to enable the performance of the above described method.

Abstract: A method and arrangement are disclosed in a Vector Control Entity for enabling a fair bit rate distribution among lines of similar priority in a vectoring group, when applying partial vectoring in a DSL communication system. The method comprises calculating a rate balancing metric, RBM, for each line i within a priority group A, indicative of the ratio between the bit rate of a line i with a current vectoring resource allocation, and the estimated bit rate of line i assuming approximately no crosstalk within the vectoring group. The method further comprises allocating partial-vectoring resources to the line/s within the group A, based on the calculated RBMs, such as to reduce the difference in RBM between the lines. The method further comprises calculating an updated RBM for any line within the group A subjected to changes in vectoring resource allocation. The method may be iterated until certain criteria are fulfilled. The arrangement is adapted to enable the performance of the above described method.

Abstract: The present disclosure relates to a Time Duplex Division (TDD) modem and a method in such a modem for making Single Ended Line Test (SELT) measurements. The device comprises a transmitter and a receiver and it has a normal mode of TDD communication. In these devices, Time Domain Reflectometry (TDR) is used as line measurement. It has a number of drawbacks, and for overcoming said drawbacks, Frequency Domain Reflectometry (FDR) measurement techniques adapted for TDD devices are suggested.

Abstract: The present invention relates to a method and a system for initiating bi-directional communication in a time-division duplex (TDD) communication system between a customer premises equipment (CPE) modem, such as a DSL modem, and an operator modem, such as a DSLAM. The invention is characterized in that the transmission of the CPE modem is aligned with the time-division duplex timing structure present in received crosstalk noise when transmitting initiation signals, so-called handshake tones.

Abstract: The present invention relates to a small-cell antenna arrangement. The antenna arrangement comprises an antenna mounting unit and an active antenna element. The antenna mounting unit is arranged with fastening means from which the active antenna element is detachable. Further, the antenna mounting unit is arranged with a signalling interface via which signals are arranged to be transferred between the active antenna element and a remotely located base station with which the antenna arrangement communicates. Moreover, the antenna mounting unit is arranged with an interface via which the active antenna element is powered.

Abstract: A device for limiting crosstalk between vectoring modems connected to a group of communication lines comprises a subgroup determining element that obtains information of the division into subgroups, each subgroup being made up of lines experiencing cross-talk from each other, and assigns operational pilot sequences to the group according to the division, an operational sequence transmission control element that transmits the operational sequences on the lines to the modems, which sequences are mutually orthogonal to each other and each communication line receives a corresponding sequence, and a corrective action determining element that obtains cross-talk measurements related to the transmitted operational pilot sequences and determines, for each subgroup, cross-talk and corrective action based on measurements made for a number of sequence symbols, which number corresponds to the minimum number required for obtaining mutually orthogonal pilot sequences within the subgroup.

Abstract: Method and transmitting node for adjusting transmission over xDSL lines connected to the transmitting node. The method involves transmitting (1006) a first signal A1 on a first line (304), and transmitting (1008) a second signal A2 on a second line (306), the second signal A2 being related to the first signal A1. The method further involves adjusting (1010) the transmission of the second signal A2 on the second line (306), such that a contribution from the second signal A2 interferes constructively with a signal A1? at the second end (304:2) of the first line (304), where the signal A1? represents the signal A1 having propagated through the first line.

Abstract: In a vectoring-capable DSL system, power can be saved by a low power mode wherein data transmission is reduced or halted, but synch symbols continue to be transmitted, so that estimation of crosstalk coefficients may continue during the low power mode. When crosstalk coefficient estimates are up to date, a line may exit low power mode without causing problematic changes of crosstalk noise in other lines, since the vectoring functionality will eliminate or reduce the crosstalk.

Abstract: Method and arrangement in a Vectoring Control Entity, VCE, for handling disorderly events in a Digital Subscriber Line, DSL, system. The method involves a number of actions, to be performed when a disorderly event occurs on a line m in a vectored group of DSL lines, and the transmission on line m is continued. The method comprises obtaining error samples from Customer Premises Equipments, CPEs, connected to other lines in the vectored group of DSL lines. The method further comprises—calculating an estimate of the channel coefficients changed due to the disorderly event, based on the error samples, thus providing a partial channel estimate. Further, the method comprises—modifying a downstream precoder, at least partly based on the partial channel estimate, such that retraining of the other lines in the vectored group due to the disorderly event is avoided. The arrangement is adapted to enable the performance of the above described method.