Abstract: A method performed by a network node for enabling Interference Alignment, IA, of transmissions to user equipments is provided. The network node receives signal strength values associated with more than one network node for the user equipments, wherein each signal strength value is associated with one network node. Then, the network node schedules a first group of the user equipments on radio transmission resources that are orthogonal to radio transmission resources of at least one other group of the user equipments when an IA gain value for each user equipment in the first group passes a threshold level. The IA gain value is determined by the network node based on the received signal strength values. The network node may then enable IA of transmissions to the scheduled first group of user equipments from at least two network nodes capable of performing IA of transmissions.

Abstract: A method is disclosed for use in a heterogeneous telecommunications system of the kind comprising a macro base station and a low-power base station, the low-power base station having a coverage which is extendible by range expansion, RE, to serve a user equipment which would otherwise have been served by the macro base station. According to the method, which is performed in either of the macro base station or the low-power base station, information about radio conditions of the user equipment at least with respect to the macro base station is obtained (310). Based on the obtained information, it is determined (320) whether a criterion for conditional range expansion is satisfied, said criterion being related to the uplink transmission power of the user equipment to the macro base station. Accordingly, range expansion is applied (330) for the user equipment only when the criterion is satisfied. A corresponding base station, telecommunications system and computer readable storage medium are also disclosed.

Abstract: A network node and a method performed by a network node for adjusting antenna parameters of one or more antennas in a wireless telecommunications network is provided. First, the network node obtains signal strength values associated with the antennas for a number of user equipments in the wireless telecommunications network. Then, the network node determines an amount of user equipments of the number of user equipments having a signal strength value difference from two antennas that passes a determined threshold for the signal strength value difference, and adjusts at least one antenna parameter of at least one of the two antennas when the determined amount of user equipments passes a determined threshold for the amount of user equipments.

Abstract: A method for uplink power control at a mobile station which is served by a base station of a communications network comprising a plurality of base stations is provided where the power spectrum density of the mobile station is adaptable based on the bandwidth scheduled to the mobile station. The suggested power spectrum adaptation is obtained by providing for a switch to an alternative power control mode which enables for transmit power boosting at the mobile station. The decision whether to apply the suggested power spectrum adaptation can be made at the base station which is serving the mobile station, or at a selected mobile station.

Abstract: A method in a network node for determining a measure of a downlink interference in a wireless communications network. The downlink interference comprises a first interference in one or more first user equipments in a first cell served by a first base station. The respective interference originates from a second base station when the second base station communicates with one or more second user equipments in a second cell. The network node obtains a first metric representing a count of the second cell as the strongest interfering cell for the one or more first user equipments in the first cell based on a respective information from the one or more first user equipments. The respective information indicates a strongest interfering cell for the respective first user equipment. The network node determines a measure of the downlink interference, based on the first metric.

Abstract: A method for cell selection comprises obtaining of user equipment specific information for a user equipment that is present in a first cell of a first base station. The user equipment specific information comprises information of a prevailing radio situation and information of a present decoding performance. A present capability of the user equipment for handling increased interference and a measure of a cell selection offset required to cover the user equipment by a second cell is estimated from the user equipment specific information. It is decided on modifying a cell selection offset for handover between the first cell and the second cell, in dependence on the estimated present capability of the user equipment for handling increased interference and the cell selection offset required to cover the user equipment by the second cell.

Abstract: A method in a user equipment for obtaining a Modulation and Coding Scheme, MCS is provided. The MCS is to be used for a transmission between the user equipment and any one or more out of the network node or a second network node. The user equipment has knowledge about a modulation and coding index table. The user equipment receives (201) one or more offset values from the network node. The user equipment obtains (205) an MCS indicator related to said transmission. The user equipment then obtains (206) the MCS from the modulation and coding index table based on the MCS indicator and the one or more offset values.

Abstract: In a multi-access system, an access selection principle is achieved by selecting a signal strength threshold level (130-133) based on a determined load level (ULOCAL) in a first access network. A new user in an area commonly covered by more than one access network attempts to allocate to the first access network if an experienced signal strength exceeds the signal strength threshold level (130-133). Communication utility can preferably be maximized or at least be taken into account by using suitable load level dependencies. By increasing the threshold when the load level approaches the capacity limit, a completely filled first access network is avoided. This gives an opportunity to let particularly well-suited users still have access to the first access network. At the same time, since the preferred access is decided before the actual access attempt, control signalling can be significantly reduced, even at very high traffic loads.

Abstract: A method in a base station for calculating a power relating to a first radio access is provided. The power is to be shared with a second radio access within the base station. The base station communicates with a number of user equipments using the first radio access. When the base station has estimated a statistic power distribution of transmit power to said user equipments during a time interval, it calculates a margin of power not to be shared with the second radio access, based on the estimated statistic power distribution. The base station further calculates a power to be shared with the second radio access, based on said margin of power.

Abstract: The present invention relates to the field of coordinated multipoint transmission and reception (CoMP) in wireless communication networks, in particular methods, an apparatus, and a network node for use in performing coordinated data transmissions in a wireless communication network. A method for use in a network node for coordinating data transmission to user equipments in a wireless communication network, wherein the wireless communication network comprising at least two access nodes each access node having one or more antennas and being arranged to perform coordinated data transmissions to user equipments is provided.

Abstract: A User Equipment, UE, operable to be used in a wireless communication network and a method performed by the UE for transmitting Sounding Reference Signals, SRSs are provided. The method comprises receiving (110) at least one transmission from at least one network node, and measuring (120) at least one radio quality indicator based on the received at least one transmission. The method further comprises comparing (130) the at least one measured radio quality indicator to at least a first threshold value; and transmitting, or refraining from transmitting, (140) SRSs based on a result of the comparison.

Abstract: A technique for assigning transceiver devices to transmission resources for inter-cell interference coordination in a heterogeneous cellular communication network is described. The network comprises a first cell layer having a first cell associated with a first transmission resource and a second cell layer having a second cell associated with a second transmission resource disjunctive from the first transmission resource.

Abstract: A method in network node for selecting a downlink modulation and coding scheme is provided. The network node obtains information comprising a first uplink signal strength of a transmission from the terminal in the first cell. The network node further obtains information comprising a second uplink signal strength of a transmission from the terminal in the second cell. The network node also obtains scheduled downlink transmission information for the respective first cell and second cell. The network node then selects a downlink modulation and coding scheme for transmission from one or more of the access point serving the first cell and the access point serving the second cell to the terminal. The selection is based on the obtained information comprising the first uplink signal strength, the obtained information comprising the second uplink signal strength, and the obtained scheduled downlink transmission information for the respective first cell and second cell.

Abstract: The present invention relates to the field of coordinated multipoint transmission and reception (CoMP) in wireless communication networks, in particular to methods, an apparatus, and a network node for use in performing coordinated data transmissions in a wireless communication network. A method for use in a network node for coordinating data transmission to user equipments in a wireless communication network, wherein the wireless communication network comprising at least two access nodes each access node having one or more antennas and being arranged to perform coordinated data transmissions to user equipments is provided.

Abstract: A network node for selecting transmission mode towards a wireless device in a wireless communications network is provided. The wireless communications network comprises a first cell and a second cell. The wireless device is connected to the first cell, which first cell is served by the network node. The network node obtains (301) information about respective downlink signal strength from the first cell to the wireless device, and the second cell to the wireless device. The network node selects (302) transmission mode towards the wireless device based on absolute signal strength and a difference in signal strength between the first cell and the second cell. The difference is calculated based on the obtained information. Publ.

Abstract: A UE and a method therein for transmission power control of uplink transmissions are provided. The method comprises receiving, through signalling a configuration indicating at least one reference signal, RS, and a reference transmission power level for each indicated RS. The method further comprises measuring received power of the indicated at least one RS, and for each measured received power, determining a pathloss, PL, based on the measured received power and the reference transmission power level for each measured received power. The method further comprises determining an uplink transmission power based on at least one determined PL.

Abstract: A user equipment is provided for a telecommunications system comprising at least a first radio base station. The user equipment controls its transmission power to a first value for a first set of one or more signals sent over a physical channel between the user equipment and the first radio base station, and to a second value for a second set of one or more signals sent over the physical channel between the user equipment and the first radio base station. The first value and said second value are different. In alternative embodiments, the second set of signals are transmitted taking into account information from the serving cell and a neighboring cell, while the first set of signals are transmitted taking into account information from the serving cell only.

Abstract: Embodiments herein relate to a method in a first communication node (201) for estimating pre-coding weights for transmission on a radio channel (205) between the first node (201) and a second communication node (203) in a communication network (200). The first node (201) comprises at least two transmit antennas. Each transmit antenna is configured to transmit on each of at least two sub-bands. The first node (201) obtains at least two pre-coding reports. Each pre-coding report is for a different time instance. Each pre-coding report comprises pre-coding weights or indications to pre-coding weights. The pre-coding weights are associated with each transmit antenna and with each sub-band. For each transmit antenna, the first node (201) estimates pre-coding weights for at least one of the sub-bands based on the pre-coding weights in the obtained pre-coding reports. The estimated pre-coding weights are different from a most resent of the obtained pre-coding reports.

Abstract: A method and arrangement for enabling communication of data between a UE and a first base station in a cellular communication network further comprising the second base station, and the second base station is connected to the first base station via a communication interface. A scheduling request is received from the first base station. The scheduling request is based on a suggested scheduling which is determined by the first base station, and the suggested scheduling concerns the communication of data. Scheduling information is determined based on the scheduling request, and the scheduling information is transmitted to the UE. By determining a suggested scheduling in a micro base station, but transmitting scheduling information from an overlaying macro base station, local awareness of communication conditions may be applied, and interferences from neighboring micro base stations may be decreased.

Abstract: The present invention relates to a method and a transceiver device in a wireless communication system that enable tuning of the polarization generated by a cross-polarized transmitting antenna configuration of an eNB. This is addressed by a solution where the polarization is adjusted (320) based on a quality indicator e.g. received (310) from one or more UEs. The quality indicator indicates the quality of the communication between the eNB and the UEs, and is used to determine if the adjustment of the antenna configuration is improving the quality of the communication or not. The tuning is thus an iteration (330) of the steps of adjusting (320) the polarization and of receiving (310) the quality indicator, and when the quality indicator has reached a pre-determined value, the iteration is stopped.