Telefonaktiebolaget Lm Ericsson (Publ)

St-Ericsson Sa

Chester Park

Havish Koorapaty

Kumar Balachandran

Lars Sundström

Jim Svensson

Yi-Pin Eric Wang

Konstantinos Dimou

Muhammad Ali Kazmi

Jung-Fu Cheng

Leif Wilhelmsson

Ali S Khayrallah

Ali Behravan

Bengt Lindoff

Henrik Sahlin

Dennis Hui

Stephen J Grant

Niklas Andgart

George Jongren

Ulf Axel Lindgren

Thomas Olsson

Peter Nauclér

Bjorn Anders Gustavsson

Lars Sundstroem

George JÖNGREN

Lars SUNDSTRÖM

Systems and methods are disclosed for measuring received signal power at a mobile terminal in a cellular communications network in such a manner as to efficiently provide highly accurate received signal power measurements in the presence of strong inter-cell interference. In one embodiment, in order to measure received signal power for a measured cell, a mobile terminal selects weighting parameters for a number of time-frequency samples of a reference signal of the measured cell based, at least in part, on inter-cell interference from one or more synchronized interfering cells and inter-cell interference from one or more non-synchronized interfering cells. The mobile terminal applies the time-frequency samples of the reference signal of the measured cell and the corresponding weighting parameters to corresponding time-frequency samples of a received signal from the measured cell in order to obtain a measurement of the received power for the measured cell.

Weighted RSRP measurement

A radio network node (), a user equipment () and methods therein for managing a transmission from the user equipment () to the radio network node () are disclosed. The radio network node () adapts () a transport format relating to the transmission based on information indicating at least one mode switching point of a radio transmitter (). The radio transmitter () is comprised in the user equipment (). The user equipment () adapts () the transmission based on the information indicating at least one mode switching point of the radio transmitter () comprised in the user equipment ().

Radio node, a user equipment and methods for managing a transmission

Systems and methods for mitigating self-interference at a wireless device in a cellular communications network are disclosed. In one embodiment, a network node obtains one or more self-interference parameters for self-interference at the wireless device within a downlink frequency band utilized by the wireless device. In one embodiment, the one or more self-interference parameters include a frequency location of the self-interference, a strength of the self-interference, or both the frequency location and the strength of the self-interference. The network node then controls uplink transmission by the wireless device, downlink reception by the wireless device, and/or downlink transmission to the wireless device in such a manner that the self-interference at the wireless device is mitigated.

Systems and methods for mitigating self-interference

A radio network node, a user equipment and methods therein for managing a transmission from the user equipment to the radio network node are disclosed. In one embodiment, the radio network node adapts a transport format relating to the transmission based on information indicating at least one mode switching point of a radio transmitter. The radio transmitter is comprised in the user equipment. In another embodiment, the user equipment adapts the transmission based on the information indicating at least one mode switching point of the radio transmitter comprised in the user equipment.

A UE communication device is provided having a transmitter architecture that transmits SRS transmissions and PUSCH transmissions. A reference mode chosen from a LPM, an MPM and an HPM is selected based on a present power mode of the SRS transmission or based on a predicted power mode that the PUSCH transmission following the present SRS transmission will likely operate in. The transmitter architecture has an exemplary extended switching point structure allowing the RPD between the SRS transmission used for pre-quarter selection and the subsequent PUSCH transmission applying the pre-quarter to be minimized.

Method of setting UE mode switching for RPD reduction

An access node is configured to adapt uplink power control procedures based on the device attributes of a wireless device. The device attributes may, for example be the mobility, energy profile, or characteristic traffic pattern of the wireless device. The adaptive uplink power control procedure may be used to minimize or reduce power consumption, to improve resource utilization efficiency, or to reduce interference levels.

Uplink power control for machine type communication devices

Systems and methods according to these exemplary embodiments provide for using demodulation reference signals (DM-RSs) to obtain channel state information (CSI) for precoder selection. A method includes: receiving a DM-RS in at least one subframe, determining the CSI from the DM-RS; and using the CSI to perform at least one function.

Methods and systems for precoder selection assisted by demodulation reference signals (DM-RS)

Devices and methods for adjusting resource management procedures based on machine device capability information are disclosed. In one aspect, a method for adjusting resource management procedures in a machine device communicating with a node operating in a communication network includes receiving a first message from the machine device, the first message including machine device capability information, processing the received machine device capability information to determine an adjustment to a resource management procedure, and transmitting a second message to the machine device, the second message including the determined resource management procedure adjustment. The first and second messages may be radio resource control (RRC) messages, such as RRC connection request and setup messages.

Methods and devices for adjusting resource management procedures based on machine device capability information

Embodiments of user equipment and methods for determining IQ imbalance parameters are described. In some embodiments, a method for determining in-phase (I) and Quadrature (Q) imbalance (IQ imbalance) parameters based on a known signal in a dual-carrier receiver using at least one controllable frequency offset includes receiving a known signal modulated onto a first radio frequency (RF) carrier frequency and a second RF carrier frequency different than the first RF carrier frequency. The known signal is downconverted to a baseband signal for the carriers by conversion from the respective RF carrier frequencies to an intermediate frequency (IF) using a common RF local oscillator (LO) and by further conversion from IF to baseband using carrier specific IF LOs, where a controllable frequency offset is used. Any controllable frequency offset is removed from the baseband signal for the first and second carriers to produce representations of the received signals.

Controllable frequency offset for inphase and quadrature (IQ) imbalance estimation

Devices and methods for adjusting resource management procedures in a User Equipment (UE) machine device communicating with one or more nodes in a communication network. In one embodiment, a method includes determining, during a first time period, the number of handovers, N, for the UE from a serving node to a different node. The method further includes comparing the value, N, to a threshold, wherein if the value, N, is greater than the threshold, mobility pattern information for the UE includes an indication of high mobility, and if the value, N, is less than or equal to the threshold, the mobility pattern information includes an indication of low mobility. The method also includes transmitting machine device capability information, including the indicated mobility pattern information, to be used for determining an adjustment to a resource management procedure for the UE.

A first communication node communicates by multiple-input-multiple-output (MIMO) wireless communications with a second communication node of a wireless communication system. The method includes receiving a Sounding Reference Signal (SRS) over a plurality of subcarriers transmitted by the second communication node for MIMO communications. Channel quality is measured responsive to the sounding reference signal to output a first channel quality value. A demodulation reference signal is received over a plurality of subcarriers transmitted by the second communication node for MIMO communications. Channel quality is measured responsive to the demodulation reference signal to output a second channel quality value. Reliability of the measurements of the first channel quality value and the second channel quality value is determined. The first and second channel quality values are combined while compensating for the determined reliability difference between the measurements to generate a combined channel quality value. Related communication nodes are disclosed.

Combining channel quality measurements based on sounding reference signals and demodulation reference signals

Methods may be provided to transmit data from a wireless terminal operating in a radio access network. For example, sampling rate conversion may be performed on a serial stream of modulation symbols to generate sampling rate converted symbols, and the sampling rate converted symbols may be transmitted over a wireless channel to a node of the radio access network. Related terminals are also discussed.

Methods of transmitting using filtering in the time domain and related devices

Methods and apparatus are disclosed for improving a precoder selection process in a wireless communications system. In a normal precoder selection process, a precoder is selected from a codebook based on channel state information estimated from received reference signals. In between two received reference signals, a subset of precoders is cycled through and each precoder in the subset is iteratively selected for use by a transmitter to precode transmit signals. The subset of precoders may be adaptively modified based on predefined criteria.

Adaptive precoder cycling

A method and a serving NodeB for adjusting transmit power of a User Equipment (UE) having multiple transmitter chains to reduce relative phase discontinuity (RPD) between a Sounding Reference Signal (SRS) and a Physical Uplink Shared Channel (PUSCH). The NodeB receives from the UE, an RP characteristic of the UE and, based on the RP characteristic, selects an SRS or PUSCH transmit power level for the UE so as to reduce the RPD. The NodeB instructs the UE to set the SRS or PUSCH transmit power level to the level selected by the NodeB.

Transmit power adjustment to reduce a relative phase discontinuity

Devices and methods for iteratively sampling a wideband signal in order to recover one or more narrowband signals are disclosed. In one aspect, a wideband signal is received and the signal is sampled using a sampling device, which includes an amplifier with an initial gain level, to produce a plurality of sampled signals. A first set of narrowband signals may be recovered from the plurality of sampled signals. Then, the wideband signal is re-sampled to produce a second plurality of sampled signals. The re-sampling includes increasing the gain of the amplifier to a second level and suppressing a component of the wideband signal. A second set of narrowband signals may then be recovered from the second set of sampled signals.

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San Jose, CA, United States of America

Chester Park