摘要:
Apparatus and method for encoding and transmitting feedback information from a first network node to a second network node in a multi-carrier wireless telecommunications network. The first network node is operable to receive signals from the second network node on two or more reception carriers and transmit data to the second network node on one or more transmission carriers. Each reception carrier being transmitted within an associated a radio band. The method comprises the steps of: (i) monitoring for a signal on at least two of the reception carriers; (ii) generating feedback information for at least two of the reception carriers based upon received signals; (iii) grouping the feedback information for reception carriers being transmitted within the same radio band; and encoding said grouped feedback information for two or more reception carriers being transmitted within the same radio band; and iv) transmitting the encoded feedback information to the second network node on one or more transmission carriers.
摘要:
A radio communication system comprises a first radio station (100) and one or more second radio stations (200). When transmitting a signal, the second radio station (200) employs power ramping to increase its transmit power up to a maximum value in a sequence of power steps. The first radio station (100) is able to control the maximum transmit power and rate of increase of transmit power of the second station (200) by transmitting indications of these parameters to the second station (200).
摘要:
In a method for receiving control information, a transceiver decodes at least one set of decoding candidates, and then detects whether control information is present on the control channel based on the decoded at least one set of decoding candidates. In a method for transmitting control information, a transceiver selects a decoding candidate from a set of decoding candidates for transmitting control information on a control channel; and transmits to another transceiver, control information using at least one time-frequency control channel resource element corresponding to the selected decoding candidate.
摘要:
A communication system comprises a downlink indicator channel (DL1) for the transmission of a indicator signal (302) indicating that a data packet (202) is scheduled to be transmitted on a downlink data channel (DLz) from a primary station to a secondary station. In operation, on detection of the indicator signal, the secondary station transmits a status signal, for example a negative acknowledgement signal (204), on an uplink channel (UL) to the primary station immediately before transmission of a positive (206) or negative acknowledgement signal to indicate the status of the received data packet. By providing the primary station with two chances to detect the case where the secondary station fails to detect the indicator signal, peak power requirements of the uplink channel can be reduced, thereby reducing system interference levels.
摘要:
Apparatus and method for encoding and transmitting feedback information from a first network node to a second network node in a multi-carrier wireless telecommunications network. The first network node is operable to receive signals from the second network node on two or more reception carriers and transmit data to the second network node on one or more transmission carriers. Each reception carrier being transmitted within an associated a radio band. The method comprises the steps of: (i) monitoring for a signal on at least two of the reception carriers; (ii) generating feedback information for at least two of the reception carriers based upon received signals; (iii) grouping the feedback information for reception carriers being transmitted within the same radio band; and encoding said grouped feedback information for two or more reception carriers being transmitted within the same radio band; and iv) transmitting the encoded feedback information to the second network node on one or more transmission carriers.
摘要:
The present invention provides a method of transforming pre-coded signals for transmission over an air interface in a MIMO wireless communication system. Embodiments of the method may include applying, at a transmitter, a transform matrix and a pre-coding matrix to a signal prior to transmitting the signal using a plurality of antennas deployed in a first antenna configuration. The pre-coding matrix is selected from a codebook defined for a second antenna configuration deployed in a non-scattering environment. The transform matrix is defined based on the first antenna configuration and a scattering environment associated with the transmitter.
摘要:
A radio terminal adjusts its data transmit power in response to received power control commands which specify a maximum transmit power level. The commands may be addressed to an individual radio terminal by means of a first address, or addressed to a group of radio terminals by means of a second address. In order that the data transmit power of an individual radio terminal is not disrupted by the commands addressed to a group, the radio terminal operates in two states. In the first state the radio terminal responds to commands comprising the first address and does not respond to commands comprising the second address. In the second state the radio terminal responds to commands comprising the second address. The radio terminal transfers from the first state to the second state in response to receiving a command comprising the first address and a predetermined value. On entering the second state the transmit power is set in accordance with the last-received command comprising the second address, thereby avoiding the need for transmission of a further command comprising the second address before transmission in the second state can proceed. Alternatively, or additionally, transmission rate may be controlled in the same manner.
摘要:
An apparatus and method for feeding back channel state information are disclosed. The method of providing channel state information for a wireless communications channel provided between a first network node having at least one transmission antenna and a second network node having at least one reception antenna comprises the steps of: estimating a current value of at least a first type of channel state information for at least one sub-channel within the channel from signals received by the at least one reception antenna over the channel from the at least one transmission antenna; determining whether the current value of the first type of channel state information varies from previously-transmitted value for the first type of channel state information by at least a predetermined amount; and if so, transmitting an indicator indicative of the current value for the first type of channel state information to the first network node.
摘要:
The present application describes embodiments of methods for network assisted interference cancellation. Some embodiments of the method include broadcasting control information from a first cell over a common control channel. The control information is associated with a data channel transmitted by the first cell and the control information is usable by user equipment served by a second cell to mitigate interference caused by the data channel at the user equipment.
摘要:
The present invention relates to a method for communicating from a primary station to a plurality of secondary station, comprising the step of at the primary station allocating a resource to the secondary stations over the time on the basis of a hash function, wherein the hash function is such that the probability that two secondary stations are allocated common resources in two sub frames substantially equals the product of the probability that the two secondary stations are allocated a common resource in the first subframe and the probability that the two secondary stations are allocated a common resource in the second subframe.