摘要:
Method and arrangement in a user equipment for adjusting signals transmitted in uplink to a network node, based on a feedback value received from the network node. The method comprises transmitting a signal, to be received by the network node. Further, the method comprises receiving a feedback signal from the network node, providing feedback on the transmitted signal. In addition, the method comprises obtaining a value of a time delay of the received feedback signal. Furthermore, the method comprises adjusting signals transmitted in the uplink according to the received feedback signal, wherein compensation is made for the obtained time delay value of the received feedback signal.
摘要:
A method, an apparatus and a system for uplink rank adaptation are provided in the present invention, wherein the method comprises: estimating the maximum supportable data rate and channel information of a user equipment in uplink transmission; comparing the maximum supportable data rate with one or more predetermined thresholds, wherein the predetermined thresholds are associated with corresponding ranks; and determining a rank used by the user equipment in the uplink transmission based on a result of the comparison and the estimated channel information. With the present invention, a base station can quickly determine a rank for uplink MIMO transmission, decrease the rank estimating error, and lower the computation complexity for estimating the rank and the subsequent pre-coding vector.
摘要:
In a network comprising a signal forwarding node, a pre-coding code book generating method, wherein the method comprises: generating a pre-coding code book, wherein the pre-coding code book comprises at least one pre-coding code word corresponding to the signal forwarding node, and the pre-coding code word comprises one or more antenna beamforming weights; and communicating the pre-coding code book to a user equipment.
摘要:
A method and arrangement in a network entity of delay calibration for an Orthogonal Frequency-Division Multiplexing (OFDM) system in a mobile communication system. The delay calibration technique as disclosed includes estimating a time delay difference according to a phase difference between two adjacent sub-carriers, dividing the estimated time delay difference into a coarse time delay and a fine time delay, and compensating the coarse time delay in time domain and the fine time delay in frequency domain respectively.
摘要:
Methods and arrangements in a control node, a base station and a UE, for achieving a UE up link transmit diversity mode adaptation, which is coordinated between a base station and a control node. The methods and arrangements involve the control node indicating a set of allowed up link transmit diversity modes to the base station. Further, an up link transmit diversity mode for the mobile terminal is selected in the base station, from amongst the currently allowed up link transmit diversity modes; where the selection is based on information concerning the mobile terminal which is available in the base station. The base station then indicates the selected up link transmit diversity mode to the mobile terminal, which changes to the up link transmit diversity mode indicated by the base station. The methods and arrangements enable a faster and more flexible UE up link transmit diversity mode adaptation.
摘要:
A method is performed by an intermediate device in a wireless network. The method includes estimating a first hop channel state based on a transmission originating from a first device. The method further includes estimating an end-to-end signal-to-noise ratio base on a transmission associated with a second device. The method also includes adapting a filter or an amplifier of the intermediate device based on the first hop channel state and the end-to-end signal-to-noise ratio.
摘要:
It is presented a method for selecting downlink mode for a UE. The method is executed in a radio network controller, RNC, and comprises the steps of: estimating geometry for the UE; selecting a mode for the UE based on the estimated geometry, the mode being either a multi cell switching mode or a multi cell aggregation mode; and configuring the selected mode for the UE. By using the geometry of the UE for selecting mode, the most appropriate mode in terms of performance, such as capacity. Corresponding methods for an RBS, a UE, along with corresponding RNC, RBS and UE are also presented.
摘要:
A radio network system employing a method with dynamic adjustment of the power offset that provides a “per-UE”-NACK to ACK power offset calculation method instead of using a fixed offset for all users in the cell is disclosed. Also for each UE, the power offset can adjusted dynamically. The adjustment is based on the error event of NACK to ACK. When an error event of NACK to ACK happens, the offset is increased, otherwise the offset is decreased. Hence, the offset can be controlled for each User Equipment for the duration of a call starting from some standard configured value is calculated and used rather than a fixed offset.
摘要:
In a transmission scheme for transmitting data over a connection connecting a transmitting Main Unit and a receiving Radio Unit of a cellular radio system, where the transmitted data corresponds to user-plane data in the form of digital baseband data for different antenna-carriers, the digital signal is transmitted over the connection, e.g. a fiber, before spreading and combining is provided. The power and weight factor is transmitted separately with a few additional bits. Hereby, the Digital signal before spreading and combining is transmitted in the fiber instead of the combined multi-code signal.
摘要:
The present invention related to a method and an arrangement for selecting an enhanced transport format combination used for maximizing power utilization efficiency and power limitation avoidance in a communication network system comprising a communication network entity communicating with a plurality of user equipments on uplink and downlink channels over a radio interface. A power consumption for an acknowledgement/negative acknowledgement transmission and a channel quality indicator transmission is determined on an uplink channel during an enhanced dedicated channel transmission. Thereby, a transport format combination is selected based on said determined power consumption.