| Patent application number | Description | Published |
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| 20080214197 | Technique for Radio Resource Management - A radio resource management technique in a cellular telecommunication system is disclosed. The telecommunication system comprises at least one radio network controlling component and one or more base station components operable to implement an uplink scheduling scheme in relation to one or more user terminals. A method embodiment comprises the steps of receiving, by one of the base station components from the at least one radio network controlling component, at least one interference control parameter, of generating one or more scheduling grants taking into account the at least one interference control parameter, and of issuing the one or more scheduling grants to one or more user terminals. | 09-04-2008 |
| 20080279121 | Signal to interference ratio error as a load instability indicator for load control in cellular systems - An uplink signal-to-interference ratio for each of multiple mobile radio terminal connections supported in a cell in a cellular communications system is estimated. A signal-to-interference ratio error is determined for selected ones of the estimated uplink signal-to-interference ratios. One or more signal-to-interference ratio errors are identified that exceed a signal-to-interference ratio error threshold. An instability indicator associated with the cell is determined based on the one or more identified signal-to-interference ratio errors. A load control decision and/or a decision for scheduling one or more uplink mobile radio transmissions in the cell may then be made based on the instability indicator, e.g., to prevent a transmission power rush in the uplink in the cell and/or to efficiently use available resources for uplink transmissions. | 11-13-2008 |
| 20090047955 | AUTOMATED AND SEAMLESS CHANGE OF REPORTING CELL IDENTITY - The technology described here allows a cell to change a cell identity without disrupting ongoing communication in that cell. In one non-limiting example embodiment, a cell identity change message is sent by a base station to one or more UEs being served in that base station. That message includes at least a new cell identifier and preferably also includes information indicating when that new cell identifier becomes active. In another non-limiting example embodiment, a cell identity change message is sent by a base station changing its cell identity to one or more neighboring base stations. | 02-19-2009 |
| 20090047956 | CELL IDENTIFIER CONFLICT RESOLUTION - The technology described automatically resolves cell identity collisions/conflicts in a cellular radio communications network. A detecting node determines that a first cell identifier associated with a first conflicting cell is the same as a second cell identifier associated with a second conflicting cell. One of the first and second conflicting cells is selected to change its cell identifier. A different cell identifier is determined for the selected cell. The different cell identifier is then provided to other cells and preferably to user equipment (UE) terminals without disrupting ongoing UE communications. | 02-19-2009 |
| 20090047960 | Closed subscriber group cell handover - A radio terminal connection may be handed over from a serving base station associated with a serving cell to a closed subscriber group (CSG) cell served by a CSG base station in which only radio terminals belonging to the CSG are permitted to access and receive service from the CSG cell. Radio terminals in the serving cell are generally informed not to report to the serving base station signal quality measurements of signals transmitted by CSG base stations. But if a radio terminal in the serving cell is authorized to access and receive service from the CSG cell, then that radio terminal is instructed to report to the serving base station signal quality measurements of signals transmitted by the CSG base station. Based on that report, the connection may be handed over to the CSG base station. A central node provides a CSG authorization list identifying CSG authorized radio terminals to the serving base station when a listed CSG cell is a neighboring cell which the radio terminal is authorized to access. | 02-19-2009 |
| 20090047968 | NEIGHBOR CELL RELATION LIST INITIALIZATION - Neighbor cell relation lists are initialized and managed in various ways that are especially beneficial to closed subscriber group (CSG) cells served by CSG base stations. Typically, only a radio terminal belonging to the CSG is permitted to access and receive service from the CSG cell. As a result, information is provided to radio terminals in the cells neighboring the CSG cell that generally indicates that radio terminals are not to report to a respective serving base station signal quality measurements of a signal received from the CSG base station unless the radio terminal is a member of the closed subscriber group for the CSG cell. When a CSG cell is powered-up, it is determined whether the CSG cell has previously been powered-on in the same environment. If so, the neighbor cell relation information for the CSG cell is updated with other network node(s). If not, neighbor cell relations of the CSG cell are initialized. In one example, when a new neighbor cell relation has been added to its neighbor cell relation list, the CSG base station inherits neighbor cell relation list entries from the newly-added neighbor cell. | 02-19-2009 |
| 20090059861 | BLIND HANDOVER USING LOAD COMPENSATED MEASUREMENTS - A method of initiating handover in a cellular radio system with CDMA access technology. A mobile station is present in a serving cell and handover should be made from a serving cell to a target cell. Before the handover is made the signal quality from the target cell is estimated. The mobile measures the signal quality, preferably Ec/Io of the pilot tone, from the serving cell. An RNC node calculates the estimated signal quality as a function of the measured signal quality, a load dependent quantity at the serving and target cells and decides to initiate the handover when the estimated signal quality at the target cell is better than a predefined minimum value or is better than the measured signal quality. As load dependent quantity the total output transmission powers P | 03-05-2009 |
| 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 |
| 20090186617 | Best-Effort Macro Diversity - The present invention relates to a network node and a method for providing macro diversity in a radio telecommunications network comprising a radio base station providing a radio link to a mobile terminal, the radio base station comprises communication resources for supporting the radio link to the mobile terminal and for supporting transmission of data between the mobile terminal and a network node. The invention comprises:—receiving a signal from the mobile terminal; estimating a signal quality parameter for the received signal; sending a first message to the mobile terminal instructing the mobile terminal to adjust at least a first transmission parameter if the signal quality parameter is below a quality target; and if the signal quality parameter is above the quality target, and if lack of the resources prevents the radio base station to relay data between the mobile terminal and the network node, sending the first message to the mobile terminal instructing the mobile terminal to adjust the at least one transmission parameter | 07-23-2009 |
| 20090191862 | INTER-RAT/ FREQUENCY AUTOMATIC NEIGHBOR RELATION LIST MANAGEMENT - In one of its aspects the technology concerns a method of operating a telecommunications system comprising a serving radio base station and a candidate radio base station. The serving radio base station comprises a radio base station to which a wireless mobile station provides measurement reports. The serving radio base station and the candidate radio base station are different with respect to at least one of frequency and radio access technology. The method comprises the serving radio base station allowing the mobile station to obtain information broadcasted by the candidate radio base station. The information is either information for locating Cell Global Identity (CGI) of the candidate radio base station or the Cell Global Identity (CGI) itself of the radio base station. The mobile station obtains the information from the candidate radio base station during at least one reading gap. The reading gap is a time period in which the mobile station does not receive information from the serving radio base station. | 07-30-2009 |
| 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 |
| 20100002813 | Soft Scaling Method and Apparatus - A received signal of interest is processed by determining timing of interference spikes in the received signal of interest. Receivers can determine when certain types of interference spikes are expected to occur, e.g., based on when different users are scheduled to transmit data during an overlapping portion of the same transmission time interval. The interference timing information is used by the receiver to soft scale signal values recovered from the received signal of interest that coincide with the interference spikes separately from remaining ones of the signal values. This way, fast changing interference power can be accurately tracked during periods of known interference spikes while also accurately tracking slower changing interference power during other periods. | 01-07-2010 |
| 20100087154 | Adjustments of IUB Load Measurements - A method may include determining whether a discrepancy exists between scheduling headroom computable by a first device and scheduling headroom computable by a second device, determining one or more load measurements that the second device bases its computation of the scheduling headroom if it is determined that the discrepancy exists, modifying the one or more load measurements, and calculating the scheduling headroom based on the modified one or more load measurements. | 04-08-2010 |
| 20100159838 | UPLINK MULTI-CELL SIGNAL PROCESSING FOR INTERFERENCE SUPPRESSION - A node (e.g., base station, signal processing unit) is described herein that includes a symbol detector and a method which are capable of suppressing interference caused by one user device (which may be in softer handoff mode) to reduce performance degradation to other intra-cell user devices and/or other inter-cell user devices (which may not be in softer handoff mode). | 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 |
| 20100178912 | Automatic Detection and Correction of Physical Cell Identity Conflicts - A PCID conflict resolution procedure is implemented with the aid of a user terminal that is capable of detecting and reporting PCID conflicts between two neighboring neighbor cells. A base station in a serving cell configures measurement reporting by user terminals within the cell capable of reporting PCID conflicts. Once measurement reporting by one or more user terminals is configured, the base station will receive measurement reports from the capable user terminals. If a capable user terminal detects a PCID conflict, the user terminal will include an indication of the PCID conflict in the measurement report. When the base station receives a measurement report with an indication of a PCID conflict, the base station implements an autonomous PCID conflict resolution to resolve the PCID conflict. | 07-15-2010 |
| 20100210255 | RANDOM ACCESS CHANNEL (RACH) RECONFIGURATION FOR TEMPORARILY EXTENDED CELL COVERAGE - A device obtains a service change associated with a cell in a radio network, and identifies helper cells in the radio network that need new random access channel (RACH) parameters due to the service change. The device also determines a RACH parameters configuration for the helper cells, and configures the helper cells with the determined RACH parameters configuration. | 08-19-2010 |
| 20100216456 | METHOD OF DETERMINING THE ACTIVE SET IN A CELLULAR RADIO SYSTEM - In a method and a device for determining an active set for a mobile station cell individual offsets (CIO) is determined for a number of cells. The offsets are signaling to the mobile station, which adds corrections to the reference signal measurements based on the cell individual offsets (CIO), thereby forming a corrected reference signal measurement and the active set based on the corrected reference signal measurement. | 08-26-2010 |
| 20100235704 | METHODS AND ARRANGEMENTS IN A WIRELESS COMMUNICATION SYSTEM - The present invention relates to methods and arrangements in a wireless communication system, and in particular to uplink outer loop power control. A Node B identifies if a UE from which the Node B receives data is in a predetermined set of power challenged situations. The Node B transmits to the RNC an indication to hold the SIR target of the UE if the UE has been identified to be in a power challenged situation. As a consequence, the uplink outer loop power control (OLPC) procedure in the RNC will not change the SIR target of the UE. This implies that the output power level of the UE remains unchanged as long as the UE remains in the power challenged situation. Thus, user and network performance are improved in the wireless communication system. | 09-16-2010 |
| 20100238832 | UPLINK TRANSMIT POWER CONTROL - Control of uplink transmit power for a first mobile station operating with scheduled uplink data transmissions. A change in uplink scheduled status for the first mobile station is detected ( | 09-23-2010 |
| 20100273487 | AUTOMATIC HANDOVER OSCILLATION CONTROL - A method and apparatus are provided for use in a cellular radio communication system for adjusting a handover parameter. Information is collected regarding actual handovers that have occurred between one or more pairs of cells as well as handover failures. The collected handover information is processed to determine a handover oscillation rate or a handover cost associated with the cell pair. If the handover performance is determined to be acceptable, the determined handover oscillation rate or the determined handover cost is compared with a predetermined target handover oscillation rate or a predetermined target handover cost, respectively. One or more handover parameters associated with at least one of the cells in the cell pair is adjusted based on the comparison. | 10-28-2010 |
| 20100290381 | METHOD AND ARRANGEMENT FOR SAVING RADIO RESOURCES BY DETERMINING POWER OFFSET VALUES IN THE USER EQUIPMENT - The present invention relates to an arrangement and a method in a user equipment of saving radio resources in a communication network system comprising a communication network node ( | 11-18-2010 |
| 20100317393 | METHOD OF UPLINK POWER CONTROL IN A WIRELESS COMMUNICATION SYSTEM - A method, a mobile station and a computer program for controlling uplink transmit power of a mobile station capable of operating with scheduled uplink data transmissions. Uplink transmit power level for the mobile station is updated ( | 12-16-2010 |
| 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 |
| 20110026492 | Method and Arrangement for Handling Handover Related Parameters in a Mobile Communications Network - The invention relates to methods and arrangements for handling handover-related parameters. A radio base station of a mobile communications network is arranged to serve at least a first cell, and to make handover decisions based on handover-related parameters. The radio base station comprises means for receiving handover related feedback from a radio base station serving a second cell after handover of a UE from said first cell to said second cell; means for using the handover related feedback received from the base station serving said second cell to adjust the handover-related parameters; and further by means for sending handover related feedback to a radio base station serving a second or another cell after handover of a UE to said first cell from said second or another cell. | 02-03-2011 |
| 20110065438 | METHOD AND ARRANGEMENT FOR SUPPORTING FAST CARRIER RESELECTION - In order to utilize uplink multi-carrier communication more efficiently and to support fast inter-frequency handovers and other types of carrier reallocations, carrier reallocation decisions are performed by the serving base station. Various non-limiting example embodiments are described for executing the base station carrier reallocation decision. | 03-17-2011 |
| 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 |
| 20110098035 | METHOD AND ARRANGEMENT FOR AUTOMATIC TUNING OF THE RACH CONFIGURATION IN A WIRELESS COMMUNICATION NETWORK - The present invention relates to a method and a communication network node for automatically tuning a PRACH configuration parameter in a communication network system comprising radio base stations each serving at least one cell and with which user equipments are communicating on uplink and downlink channels. The PRACH configuration parameter is used for defining the division of uplink resource blocks between PRACH and PUSCH. Load statistics on RACH and PUSCH are collected used for determining a number of RACH opportunities required per time unit. Then a new PRACH configuration parameter having said required number of RACH opportunities per time unit is selected which is replacing the old PRACH configuration parameter. | 04-28-2011 |
| 20110098045 | METHOD AND ARRANGEMENT IN A COMMUNICATION NETWORK SYSTEM - A method of signalling a set cell identities in a cellular radio system from a transmitter to a receiver is provided. The method includes coding of a sequence of cell identities using a range indicator. The coded sequence is then signalling using the coded sequence. The range indicator can be an range indicator or an explicit range indicator. | 04-28-2011 |
| 20110158104 | Determining Preamble Sequences For Random Access - The present invention relates to a method and a communication network node for enabling auto-tuning of preamble sequences used during random access procedures when user equipments ( | 06-30-2011 |
| 20110159901 | Method and Arrangement, Cell ID Collision Detection - The present invention relates to methods, a communication network node and a user equipment for detecting collision of physical cell identities in a communication network system comprising radio base stations each serving at least one cell through which user equipments are moving. Reference signals comprising reference symbols corresponding to a physical cell identity are sent from said radio base stations to said user equipments over a radio interface. Transmission gaps of reference symbols are inserted in the reference signal in order to perform a physical cell identity collision test. The user equipments are arranged to detect if any other radio base station is sending reference symbols corresponding to the same physical cell identity during the transmission gaps. Thereby a physical cell identity collision is detected. The reference symbol transmission gaps are fractionally distributed within said reference signal such that at least some of said reference symbols are unaffected by said reference symbol transmission gaps. | 06-30-2011 |
| 20110165874 | METHOD AND ARRANGEMENT IN A COMMUNICATION NETWORK SYSTEM - A method and a communication network node for satisfying detection miss probability and false detection probability requirements in a random access channel used by mobile stations (MS) for accessing a communication network system comprising radio base stations (BS) each serving at least one cell ( | 07-07-2011 |
