Telefonaktiebolaget Lm Ericsson (publ)

Guangdong Oppo Mobile Telecommunications Corp., Ltd.

David Hammarwall

George Jöngren

Svante Bergman

David Astely

Xinghua Song

Daniel Chen Larsson

Niklas Wernersson

Magnus Lundevall

Jianfeng Wang

Yang Hu

Robert Baldemair

Erik Bengt Dahlman

Stefano Sorrentino

Meng Wang

George Jongren

Bo Göransson

Dirk Gerstenberger

Imadur Rahman

Stefan Parkvall

Bengt Lindoff

Jung-Fu Cheng

Mattias Frenne

Havish Koorapaty

Eliane Semaan

Leif Wilhelmsson

Erik A Eriksson

Joakim Axmon

Yu Yang

Shaohua Li

Jonas Fröberg Olsson

Muhammad Imadur Rahman

Ali Behravan

Patrick Svedman

Per Magnus Lundevall

Daniel Larsson

Stefano Sorrention

George JÖNGREN

A method and radio node for enabling higher-order modulation in a radio communication with a first UE. A first table configuration comprises at least one of a first Modulation and Coding Scheme, MCS, table and a first Channel Quality Indicator, CQI, table which tables support a certain maximum modulation order. When the radio node detects that a modulation order higher than the maximum modulation order of the first table configuration is potentially possible to use in the radio communication, the radio node instructs the first UE to apply a second table configuration which comprises at least one of a second MCS table and a second CQI table which second tables support the higher modulation order. At least one entry for at least one modulation order in the tables of the first table configuration is maintained in the tables of the second table configuration as a fall-back in case it is desirable to use the at least one modulation order of the first table configuration when the second table configuration is applied. Thereby, a higher data rate can be achieved in the radio communication.

Method and radio node for enabling use of high order modulation in a radio communication with a user equipment

A system and method to instruct a user equipment (UE) how Uplink Control Information (UCI) on a Physical Uplink Shared Channel (PUSCH) should be transmitted with carrier aggregation. A semi-static signaling of a UCI mapping bit (via a Radio Resource Control (RRC) parameter) is used by a base station such as an eNodeB to require the UE to transmit UCI using one of two pre-determined UCI transmission modes. The bit can be decided by the base station, considering, for example, the available bandwidth or quality of different Uplink Component Carriers (UL CCs) associated with the UE. This network-based solution allows the network to either configure a general rule of UCI transmission by the UE or to enforce the UCI transmission on the Uplink Primary cell (UL Pcell). Because of the rules governing abstracts, this abstract should not be used to construe the claims.

Uplink control information (UCI) mapping indicator for long term evolution (LTE) carrier aggregation

A method in a wireless device for reporting Channel State Information (CSI). The wireless device is comprised in a wireless communications system. The method includes receiving a CSI process configuration and a request for CSI information from a network node. The method further includes reporting CSI for one or more CSI processes. The CSI reflects the state of the channel for a CSI reference resource. According to the method, the CSI reference resource is determined based on the number of configured CSI processes. Related devices are also disclosed.

Methods and arrangements for CSI reporting

The teachings herein present a method and apparatus that implement and use a factorized precoder structure that is advantageous in terms of performance and efficiency. In particular, the teachings presented herein disclose an underlying precoder structure that allows for certain codebook reuse across different transmission scenarios, including for transmission from a single Uniform Linear Array (ULA) of transmit antennas and transmission from cross-polarized subgroups of such antennas. According to this structure, an overall precoder is constructed from a conversion precoder and a tuning precoder. The conversion precoder includes antenna-subgroup precoders of size N/2, where Nrepresents the number of overall antenna ports considered. Correspondingly, the tuning precoder controls the offset of beam phases between the antenna-subgroup precoders, allowing the conversion precoder to be used with cross-polarized arrays of N/2 antenna elements and with co-polarized arrays of Nantenna elements.

Precoder structure for MIMO precoding

A UE and a method performed by the UE for power control of uplink transmissions, when the UE is connected in dual connectivity mode to at least a first network node and a second network node are provided. The method includes determining to perform a first uplink transmission to the first network node and a second uplink transmission to the second network node, the uplink transmissions to be performed simultaneously. The method also includes determining a respective first and second uplink transmission power for the first and second uplink transmission; and transmitting the first and the second uplink transmissions at the first and the second uplink transmission power respectively when the sum of the first and second uplink transmission power is below a maximum transmission power.

User equipment and a method for power control of uplink transmissions

Some embodiments provide a method in a wireless device for reporting channel state information, CSI, for a CSI process. The CSI process corresponds to a reference signal resource and an interference measurement resource. According to the method, the wireless device obtains an adjustment value associated with the CSI process. The wireless device estimates an effective channel based on one or more reference signals received in the reference signal resource, and applies the adjustment value to the estimated effective channel, thereby obtaining an adjusted effective channel. Furthermore, the wireless device determines channel state information based on the adjusted effective channel, and on interference estimated based on the interference measurement resource. Finally, the channel state information is transmitted to a network node.

A unified, rank independent mapping between antenna ports and group/code pairs. Each antenna port is uniquely associated with one code division multiplexing (CDM) group and one orthogonal cover code (OCC). The mapping between antenna ports and group/code pairs is chosen such that, for a given antenna port, the CDM group and OCC will be the same for every transmission rank.

Antenna port mapping for demodulation reference signals

A network node in a wireless communication network communicates an enhanced Physical Downlink Control Channel (ePDCCH) to a user equipment (UE). This begins with the transmission, to the UE, of a configuration message that indicates the mappings of ePDCCH onto resource elements for both a first ePDCCH set and a second ePDCCH set. The mapping for the first ePDCCH set avoids the use of resource elements already in use by a first type of signal (e.g., a Cell-Specific Reference Signal or CRS), whereas the mapping for the second ePDCCH set avoids the use of resource elements in use by a second type of signal. The choice of an ePDCCH set for transmitting data to a UE may then be dynamically made in order to avoid interference caused by the first or second types of signal.

Methods, network nodes and user equipments in a wireless network for communicating an EPDCCH

A system and method for providing an eNodeB with the flexibility to configure a Channel State Information (CSI) report to match a specific Coordinated Multipoint (CoMP) transmission hypothesis, which is a candidate for a downlink transmission to a User Equipment (UE) is disclosed. A UE receives, from the eNodeB, a configuration message that specifies a CSI report. The CSI report is specified by a particular interference hypothesis and a particular desired signal hypothesis corresponding to data transmission over at least one effective channel characterized by a specific reference signal. The UE estimates interference according to the interference hypothesis, and/or estimates at least one effective channel by performing measurements on the specific reference signal, and determines a CSI report based on the interference estimation and on the estimated effective channel. The UE also transmits the CSI report to the eNodeB.

Configuration of coordinated multipoint transmission hypotheses for channel state information reporting

Method and apparatus for enabling accurate link quality estimation of a wireless link between a sending node and a receiving node. When the sending node receives link state reports from the receiving node, it estimates the current state of the wireless link. The sending node also determines a measurement adjusting parameter if the link state reports are deemed inaccurate in relation to the estimated link state, based on a deviation between the received link state reports and the estimated actual link state. The sending node then sends the determined measurement adjusting parameter to the receiving node, and the receiving node provides a link state report based on signal measurements adjusted by the measurement adjusting parameter. The adjusted link state report can then be used for link adaptation of the wireless link and/or for packet scheduling decisions.

Link quality estimation and apparatus in a telecommunication system

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Vallentuna, Sweden

David Hammarwall