Abstract: A power controller is presented, arranged to control transmission power of at least one mobile communication terminal of a cell of a mobile communication network. The power controller comprises: a candidate maximum signal to interference ratio, SIR, calculator, arranged to calculate a candidate maximum SIR based on a current headroom value, the headroom value being an indicator of how much the transmission power of the at least one mobile communication terminal is allowed to increase in the cell; and a SIR determiner arranged to determine a maximum SIR for the at least one mobile communication terminal based on the candidate maximum SIR.

Abstract: There is provided a method of operating a mobile device in a heterogeneous communications network, the heterogeneous communications network comprising first and second base stations, the first base station having a lower transmission power than the second base station and being within the coverage area of the second base station, the method comprising obtaining measurements of the quality of signals transmitted between the first base station and the mobile device and/or the second base station and the mobile device; and analyzing the measurements of the quality to determine whether the mobile device is located in an imbalanced region or part of an imbalanced region between the first and second base stations.

Abstract: A new set of random-access preamble signatures are introduced to differentiate new-release UEs from UEs compliant only with earlier releases. Additional new features of a random-access procedure are also disclosed, including an ability to deploy multiple transmission-time-intervals TTIs) in a given area. An example mobile terminal, according to some embodiments of the present invention, selects a TTI from two or more possible TTIs. The mobile terminal then selects a preamble signature from a group of one or more preamble signatures associated with enhanced-uplink resources and associated with the selected TTI, and transmits a random-access channel (RACH) preamble, using the selected preamble signature. In some embodiments, the mobile terminal selects between a 2-millisecond TTI and a 10-millisecond TTI.

Abstract: A wireless terminal comprises a communications interface and a congestion controller. The communications interface communicates over a radio interface with a base station. The congestion controller, upon occurrence of a congestion indication, reduces uplink transmission power of the wireless terminal by lowering a transport format combination for use by the wireless terminal for transmitting an enhanced dedicated uplink channel (E-DCH) over the radio interface to the base station. In an example embodiment and mode, the congestion controller performs an expedited transport format combination reduction procedure which is distinct from Dedicated Physical Control Channel (DPCCH) power reduction based on a command received in a closed loop power control procedure, e.g., on a Fractional-DPCH (F-DPCH) channel.

Abstract: In MU-MIMO scenarios, a target terminal can be exposed to data streams intended for other terminals. If the target terminal is capable of interference cancellation, then a network node, such as a base station or RNC, can provide the target terminal with interference information so that the target terminal can efficiently cancel interferences due to these interfering data streams. The interference information may include one or more interfering configuration, each of which characterizes a related interfering data stream. The interference information can also include the identity of the other terminal that is the intended recipient of the interfering stream. The network node may determine whether the target terminal can benefit from the interference information. If so, the network node can provide the interference information to the target terminal.

Abstract: In a radio system methods and devices for setting a timer for releasing a common Enhanced Dedicated Channel resource is provided. The methods and devices sets a variable expiration time for the timer so that the expiration time is set in response to a current system load and or in response to the traffic type generated and transmitted in the radio network.

Abstract: Embodiments of the disclosure provide a method, an apparatus, a wireless network node, a user equipment and a computer program product for random access in a wireless network. According to the method, a RoT level may be selected from a plurality of RoT levels according to a predetermined policy, and a time period with the selected RoT level may be determined for initiating a random access request.

Abstract: There is provided a method of operating a first base station in a mobile communications network, the network comprising a mobile device, a second base station and a node that controls the first and second base stations, the mobile device having an active connection with the second base station, the mobile device not having an active connection with the first base station, the method comprising receiving a data transmission sent from the mobile device to the second base station; attempting to decode the data transmission; and in the event that the data transmission is successfully decoded, transmitting the decoded data to the node or the second base station. Methods of operating second base stations and nodes that control the operation of the first and second base stations are also provided.

Abstract: There is provided a method for determining an offset to be used to extend the range of a first base station in a mobile communication network, the method comprising determining one or more characteristics of a mobile device; and determining offset to be used to extend the range of the first base station from the one or more characteristics.

Abstract: There is provided a method of operating a mobile device in a heterogeneous communications network, the heterogeneous communications network comprising first and second base stations, the first base station having a lower transmission power than the second base station and being within the coverage area of the second base station, the method comprising obtaining measurements of the quality of signals transmitted between the first base station and the mobile device and/or the second base station and the mobile device; and analysing the measurements of the quality to determine whether the mobile device is located in an imbalanced region or part of an imbalanced region between the first and second base stations.

Abstract: Embodiments herein relate to a method in a network node (12,14) for signalling Hybrid Automatic Repeat Request, HARQ, configuration for a common enhanced dedicated channel configuration in a radio communications network (1). The network node (12,14) is comprised in the radio communications network (1) and serves a user equipment (10). The network node (12,14) determines a state of a HARQ process of a transmission time interval out of a number of HARQ processes for a common enhanced dedicated channel configuration. The state is defining whether the HARQ process is active or inactive. The network node (12,14) signals the HARQ configuration for the common enhanced dedicated channel configuration by broadcasting a value representing the state of the HARQ process.

Abstract: In one of its aspects the technology disclosed herein concerns a wireless terminal (30) which is configured to communicate over a radio interface (32) with a radio access network. The wireless terminal (30) comprises a timer (52) and a timer controller (54). The timer (52) is configured to determine when to release an Enhanced Dedicated Channel (E-DCH) resource utilized on an uplink from the wireless terminal (30) to the network. The timer controller (54) is configured to initialize or adjust the timer with a timer value received from the network, the timer value being for a mode in which the network has commanded the wireless terminal to request a common E-DCH resource.

Abstract: A new set of random-access preamble signatures are introduced to differentiate new-release UEs from UEs compliant only with earlier releases. Additional new features of a random-access procedure are also disclosed, including an ability to deploy multiple transmission-time-intervals TTIs) in a given area. An example mobile terminal, according to some embodiments of the present invention, selects a TTI from two or more possible TTIs. The mobile terminal then selects a preamble signature from a group of one or more preamble signatures associated with enhanced-uplink resources and associated with the selected TTI, and transmits a random-access channel (RACH) preamble, using the selected preamble signature. In some embodiments, the mobile terminal selects between a 2-millisecond TTI and a 10-millisecond TTI.

Abstract: In MU-MIMO scenarios, a target mobile terminal can be exposed to data streams intended for other mobile terminals. If the target mobile terminal is capable of interference cancellation, then a serving base station can provide the target mobile terminal with interference information so that the target mobile terminal can efficiently cancel interferences due to these interfering data streams. The interference information includes one or more configuration information, each of which characterizes a related interfering data stream. The serving base station provides the interference information over one or more radio resources that are exclusive allocated to the target mobile terminal or are allocated for common listening. The serving base station exchanges configuration information with neighboring base stations over inter-BS links. The inter-BS links use resources that are different from the radio resources used between the base stations and the mobile terminals.

Abstract: There is provided a method of operating a node in a mobile communication network, the network comprising a mobile device, a first base station and a second base station, the first base station having a lower transmission power than the second base station and being within the coverage area of the second base station, the method in the node comprising determining (101; 111) whether the mobile device is in an imbalanced region or a part of an imbalanced region between the first base station and the second base station; and determining (103; 113-121) whether to switch the mobile device between a first connection state and a second connection state based on whether the mobile device is located in the imbalanced region or the part of the imbalanced region.

Abstract: A new set of random-access preamble signatures are introduced to differentiate new-release UEs from UEs compliant only with earlier releases. Additional new features of a random-access procedure are also disclosed, including an ability to deploy multiple transmission-time-intervals TTIs) in a given area. An example mobile terminal, according to some embodiments of the present invention, selects a TTI from two or more possible TTIs. The mobile terminal then selects a preamble signature from a group of one or more preamble signatures associated with enhanced-uplink resources and associated with the selected TTI, and transmits a random-access channel (RACH) preamble, using the selected preamble signature. In some embodiments, the mobile terminal selects between a 2-millisecond TTI and a 10-millisecond TTI.

Abstract: The invention provides a method for transmitting a serving grant to a base station. In some embodiments the method includes: storing a serving grant in a storage unit, generating a layer two protocol data unit (L2 PDU); and transmitting the L2 PDU to the base station, wherein the step of generating the L2 PDU comprises adding the serving grant to the L2 PDU.

Abstract: It is presented a power controller arranged to control transmission power of at least one mobile communication terminal of a cell of a mobile communication network. The power controller comprises: a candidate maximum signal to interference ratio, SIR, calculator, arranged to calculate a candidate maximum SIR based on a current headroom value, the headroom value being an indicator of how much the transmission power of the at least one mobile communication terminal is allowed to increase in the cell; and a SIR determiner arranged to determine a maximum SIR for the at least one mobile communication terminal based on the candidate maximum SIR.

Abstract: There is provided a method of operating a network node in a communication network, the communication network comprising a mobile device, a first base station and a second base station, the first base station having a lower transmission power than the second base station and being located within the coverage area of the second base station, the mobile device being located within an imbalanced region between the first base station and the second base station and being served by the first base station, the method in the network node comprising configuring the mobile device, the first base station and the second base station such that the mobile device transmits uplink data to the first base station, and the mobile device receives downlink data only from the second base station. Corresponding methods are provided for operating a mobile device and a second base station. A network node, mobile device and second base station are also provided that are configured to perform the respective operating methods.

Abstract: In a method and a device for selecting transport format in a User Equipment transmitting data in a cellular radio system using an Enhanced Uplink (EUL) with Discontinuous Reception (DRX) the determination of whether or not to transmit data in the next Transmission Time Interval (TTI) is based on the amount of data in the User Equipment transmission buffer.