Abstract: The invention relates to a solution for determining an allowable round trip time for a communication between a base station and a terminal device served by the base station in an asynchronous communication system, At least some aspects of the solution relate to a method performed by a controller, the method comprises: determining round trip times of terminal devices served by the base station; selecting a maximum round trip time among the determined round trip times of the terminal devices served by the base station as the allowable round trip time; and delivering the selected allowable round trip time to the base station. The solution also relates to applying the determined round trip time by a base station and a terminal device as well as to a system comprising the mentioned entities and to computer program products.

Abstract: The invention relates to a solution for determining an allowable round trip time for a communication between a base station and a terminal device served by the base station in an asynchronous communication system, At least some aspects of the solution relate to a method performed by a controller, the method comprises: determining round trip times of terminal devices served by the base station; selecting a maximum round trip time among the determined round trip times of the terminal devices served by the base station as the allowable round trip time; and delivering the selected allowable round trip time to the base station. The solution also relates to applying the determined round trip time by a base station and a terminal device as well as to a system comprising the mentioned entities and to computer program products.

Abstract: The invention relates to a solution for determining an allowable round trip time for a communication between a base station and a terminal device served by the base station in an asynchronous communication system, At least some aspects of the solution relate to a method performed by a controller, the method comprises: determining round trip times of terminal devices served by the base station; selecting a maximum round trip time among the determined round trip times of the terminal devices served by the base station as the allowable round trip time; and delivering the selected allowable round trip time to the base station. The solution also relates to applying the determined round trip time by a base station and a terminal device as well as to a system comprising the mentioned entities and to computer program products.

Abstract: The invention relates to a solution for determining an allowable round trip time for a communication between a base station and a terminal device served by the base station in an asynchronous communication system, At least some aspects of the solution relate to a method performed by a controller, the method comprises: determining round trip times of terminal devices served by the base station; selecting a maximum round trip time among the determined round trip times of the terminal devices served by the base station as the allowable round trip time; and delivering the selected allowable round trip time to the base station. The solution also relates to applying the determined round trip time by a base station and a terminal device as well as to a system comprising the mentioned entities and to computer program products.

Abstract: Disclosed is a base station including at least one baseband processing unit, a front-haul network and at least one remote radio unit. The base station further includes an adaptation unit configured to control transmission data packets between the baseband processing unit and at least one remote radio unit. The adaptation unit includes a buffer module and a communication module that is configured to determine if the buffer module includes at least one data packet to be transmitted at a scheduled instant of time, and in response to a detection that the at least one data packet is missing the communication module inserts padding data to the buffer module. The invention also relates to a method thereto.

Abstract: Disclosed is a base station including at least one baseband processing unit, a front-haul network and at least one remote radio unit. The base station further includes an adaptation unit configured to control transmission data packets between the baseband processing unit and at least one remote radio unit. The adaptation unit includes a buffer module and a communication module that is configured to determine if the buffer module includes at least one data packet to be transmitted at a scheduled instant of time, and in response to a detection that the at least one data packet is missing the communication module inserts padding data to the buffer module. The invention also relates to a method thereto.

Abstract: A method for controlling the aggregate interference of a secondary system (10) in a cognitive radio network comprises the steps of computing the power density (Pd,i), footprint (Afoot,i) and service area (Ai) for each of the cells (100) of the secondary system (10) that satisfy the interference constraint at a given point (P) in a primary system (50); summing the power densities (Pd,i) for all cells (100) for the point (P); and using the sum of the power density at the point (P) to decide which power level a new secondary system (10) user is allowed to use in a given cell (100). A system for performing such a method is also disclosed.

Abstract: A method for controlling the aggregate interference of a secondary system (10) in a cognitive radio network comprises the steps of computing the power density (Pd,i), footprint (Afoot,i) and service area (Ai) for each of the cells (100) of the secondary system (10) that satisfy the interference constraint at a given point (P) in a primary system (50); summing the power densities (Pd,i) for all cells (100) for the point (P); and using the sum of the power density at the point (P) to decide which power level a new secondary system (10) user is allowed to use in a given cell (100). A system for performing such a method is also disclosed.

Abstract: In connection with the determination the transmit power of a beginning transmission there is also determined, in the method according to the invention, suitable output powers for other transmissions, so that the entity formed by all controlled transmissions is as close to the optimum as possible already at the beginning of a new frame. The method according to the invention takes into consideration the effect of a beginning transmission on other transmissions. The method according to the invention further takes into consideration changes in the conditions during the previous frame by including the control history of the fast power control as initial information of the calculation made during the re-determination of the output powers, for instance as a suitable statistical quantity of the transmission history of each transmission, for instance as an average over a certain period.