| Patent application number | Description | Published |
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| 20080242308 | Selection of an uplink carrier frequency corresponding to one of co-sited cells having different coverage areas and supporting different uplink data rates - Random access coverage is assured while at the same supporting high uplink data rates in a same service area served by a base station. The service area includes first and second co-sited cells. The first co-sited cell is associated with a first uplink frequency, and the second co-sited cell is associated with a second uplink frequency. The first cell allows a lower uplink load and provides a greater coverage than the second cell. The second cell allows a higher rise over thermal (RoT) value than the first cell. Random access channel requests are initially directed to the first cell using the first uplink frequency. One of the co-sited cells is selected for supporting the connection depending on one or more factors. Example factors include a priority associated with the mobile terminal, a capability associated with the mobile terminal, a load situation in the second cell, or radio channel conditions associated with the mobile radio terminal. | 10-02-2008 |
| 20090098874 | NARROW BEAM HANDOVER - Handover is a main function that is used to support mobility in the network. In a cellular communication network having adaptive antennas for enabling narrow beam operation, a network control unit sends a radio link setup request to a selected cell-serving network unit for configuration of a new serving radio link. Before responding to the radio link setup request the cell-serving network unit performs uplink measurements with respect to the mobile unit, and a narrow target beam is selected within a cell served by the cell-serving network unit based on these measurements. The cell-serving network unit then configures the new serving radio link for the considered mobile unit directly with the selected narrow target beam. Consequently the system can perform the handover procedure using narrow beams only, without first establishing the radio link with a cell-wide beam and then reconfiguring the radio link onto a narrow beam. | 04-16-2009 |
| 20090149134 | POWER CONTROL FOR A RADIO TRANSCEIVER THAT USES INTERFERENCE CANCELLATION - A signal power associated with a signal received in a current time period is determined. The determined signal power is combined with a predicted effective interference to form a predicted signal-to-interference indicator. The predicted signal-to-interference indicator is compared to a target signal-to-interference indicator. One or more transmit power control commands are generated based on the comparison. In one example embodiment, the predicted effective interference is based on an effective interference estimated for a previous time period. In another example embodiment, the predicted effective interference is based on interference contributions estimated in a current time period and a predicted interference cancellation efficiency. The predicted interference cancellation efficiency is based on the estimated interference cancellation efficiency for a previous time period. The technology is particularly useful in receivers that use interference cancellation and achieves excellent transmit power control performance both in terms of accuracy and speed. | 06-11-2009 |
| 20090168906 | Methods and arrangements in a mobile telecommunication network - The present invention relates to a first unit adapted to be used in a base station in a mobile telecommunication network adapted to use an identity for identifying a mobile terminal or for identifying a channel in the uplink. The first unit comprises means for managing information of at least one additional identity of a mobile terminal or a channel, belonging to at least a second base station, it should be aware of for interference mitigation purposes, preferably means for detecting whether the mobile terminal or channel identified by said additional identity is active and means for mitigating cell-interference caused by an active mobile terminal or a channel identified by the additional identity. The invention also relates to a second unit comprising means for reserving at least one identity for identifying a mobile terminal or for identifying a channel in order to make the at least one identity identifiable to at least a second base station. | 07-02-2009 |
| 20090258654 | RESOURCE SCHEDULING IN WIRELESS COMMUNICATION SYSTEMS USING BEAM FORMING - A basic idea of the invention is to provide multi-user resource scheduling and distribution based on balancing the power resources used for the different narrow beams in order to smooth the interference levels over the whole cell, area and to reduce interference fluctuations. The resource scheduling principle according to the invention is especially useful when the available resources are not fully utilized. The idea is to select, for each antenna beam of at least a subset of the antenna beams, at least two mobile users for service using the respective antenna beam during a transmission time interval, and to distribute power resources to the antenna beams for use during the transmission time interval based on the guideline of balancing the power resources among different antenna. | 10-15-2009 |
| 20090298502 | ADVANCED HANDOVER FOR ADAPTIVE ANTENNAS - Handover is a main function that is used to support mobility in the network. In a cellular communication network having adaptive antennas for enabling narrow beam operation, it is assumed that a mobile unit is served by an active cell set (S | 12-03-2009 |
| 20090305636 | METHOD AND ARRANGEMENT FOR INTERFERENCE MITIGATION - In a method of interference mitigation in a multi user detection capable radio base station in a communication system, which radio base station comprises a set confined detection modules, at least one of which is capable of handling multiple user connections, first and at least a second subset of detection modules are formed from said set, wherein the second set comprises at least one interference mitigation capable detection module. Interference information from the first subset is communicated to the second subset, interference originating in user connections of the first subset are then mitigated from the user connections of the second subset. Subsequently, interference is mutually mitigated between the connections within the interference mitigation capable detection module. | 12-10-2009 |
| 20100061344 | METHOD AND ARRANGEMENTS FOR LOAD BALANCING OF POWER AMPLIFIERS - The present invention relates to a transmit unit, a control unit and a method in a transmit unit comprising at least two antennas for transmitting signals relating to a plurality of radio channels. The transmit unit transmit signals relating to a first subset of channels from the first antenna and pilot signals from the first antenna for use a reference for the first subset of channels. The transmit unit is further arranged to transmit signals relating to a second subset of channels from the second antenna using single antenna transmission. The transmit unit also transmits pilot signals on a second type of pilot channel such as the S-CPICH, different from the first type of pilot channel, from the second antenna for use as a reference for the second subset of channels, wherein the first and second type of pilot channels are substantially covering the same area. | 03-11-2010 |
| 20100112952 | BASE STATION AND METHOD FOR IMPROVING COVERAGE IN A WIRELESS COMMUNICATION SYSTEM USING ANTENNA BEAM-JITTER AND CQI CORRECTION - A base station and method are described herein that improves the coverage in a fixed-beam wireless communication system by using antenna beam-jitter and Channel Quality Information (CQI) correction. In one embodiment, the method includes the steps of: (a) modifying a beam by introducing a beam-jitter in a beam-forming pattern; (b) receiving an estimated channel quality information, CQI, from a user terminal; (c) accounting for effects of the beam-jitter on the estimated CQI to obtain a jitter-adjusted CQI estimate; (d) and using the jitter-adjusted CQI estimate during user scheduling for a future transmission to the user terminal. | 05-06-2010 |
| 20100159930 | BASE STATION AND METHOD FOR VERTICAL TILT ANTENNA BEAM SWEEPING - A base station and method are described herein that vertically sweeps an antenna beam within a cell to improve the signal quality at scheduled times for a user terminal located within a coverage area of the cell. In one embodiment, the method improves a signal quality for a user terminal by: (a) vertically sweeping a beam within a cell coverage area to vary a signal quality at scheduled times for the user terminal located within the cell coverage area; and (b) performing one or more scheduling functions while taking into account variations in the vertical sweep of the antenna beam. For instance, the scheduling function(s) can include a link adaptation function, a resource allocation function, a user admittance/dropping function, a handover function, and/or a hybrid automatic repeat request function. | 06-24-2010 |
| 20100159970 | Method for Fast Acknowledgement and Identification of a Service Access Request Message or a Preamble Thereof - 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. | 06-24-2010 |
| 20100222066 | METHOD OF MANAGING RADIO RESOURCES IN A CELLULAR RADIO SYSTEM - In a method and a system for managing resources within a cellular radio system servicing a geographical area, the serviced area is divided into at least two types and additional radio resources is provided to mobile stations located within one of the areas being deemed to be more sensitive for interference compared to mobile stations located within the other area. | 09-02-2010 |
| 20100238869 | RADIO COVERAGE ENHANCEMENT - The invention provides an increase in the radio coverage area ( | 09-23-2010 |
| 20110021223 | Method for Determining a Subsequent Time Interval Relationship, for Service Request Messages, from a User Equipment - The invention relates to a method in a base station for handling a request from a user equipment for accessing a service in a radio communications network, the method comprising the steps of receiving a first wide time interval ( | 01-27-2011 |
| 20110075636 | RANDOM ACCESS WITH FULL COVERAGE ON SELECTED RESOURCES - Random access coverage is assured while at the same time supporting high uplink data rates in a same service area served by a base station. A set of radio resources are shared by multiple mobile terminals for transmitting uplink to the base station including requests for access to service from the base station and transmissions for active connections with the base station. A first repeating time period and a second different repeating time period are defined. Uplink transmission grants are scheduled for active connections that permit use of a greater amount of the radio resources during the first repeating time period. Uplink transmission grants are also scheduled for active connections that permit use of a smaller amount of those resources during the second repeating time period. At least some random access requests to the base station are controlled to occur only during the second repeating time period. | 03-31-2011 |
| 20110090981 | Method and Apparatus For Communication Site Planning - The present invention relates to a solution for determining wireless communication cell characteristics related to wireless MIMO transmission mode and dynamically selecting suitable communication transmission mode for certain parts of the wireless communication cell. The solution uses a flatness spectrum analysis of received impulse response from a plurality of measurement points in the cell using a plurality of antennas in a wireless network access gateway, e.g. a base station. | 04-21-2011 |
| 20110105166 | Method and Arrangement in a Telecommunication System - In a method of radio link handling in a radio base station (RBS) in a telecommunication system, said radio base station (RBS) supporting a plurality of mobile user equipment (UE) and comprising a plurality of antenna arrangements each associated with a respective determined cell coverage area. Performing the steps of actively determining ( | 05-05-2011 |
| 20110150118 | ANTENNA ARRANGEMENT FOR INTERFERENCE REDUCTION AND MIMO COMMUNICATION - The present invention relates to an antenna arrangement for use in a wireless communication system, where the arrangement comprises at least two single-polarized antenna functions. Each antenna function is adapted for radiating an antenna radiation lobe pattern having a horizontal extension in an azimuth plane, and a vertical extension in an elevation plane, perpendicular to the azimuth plane. The antenna functions both have a first polarization in a first direction. In a second direction separated from the first direction, the second antenna function has a second polarization and the first antenna function has a third polarization, the second polarization and the third polarization being orthogonal to each other. | 06-23-2011 |
