Nokia Technologies Oy

Nokia Corporation

Honglei Miao

Pekka Janis

Mika P Rinne

Sassan Iraji

Pekka Jänis

Lili Zhang

Disclosed is a method and an apparatus providing antenna port sharing and a demodulation reference signals (DMRS) based precoding scheme for a distributed enhanced physical downlink control channel (E-PDCCH) using, for example, spatial frequency block codes (SFBC)/frequency selective transmit diversity (FSTD) transmit diversity. The method exhibits the same performance as SFBC/FSTD transmit diversity using un-precoded DMRS while not prohibiting another UEs' localized E-PDCCH to be potentially multiplexed in a same physical resource block (PRB) pair. The SFBC/FSTD transmission is facilitated by mapping a subset of layers to DMRS ports used by other UEs for localized and beamformed transmission, while the precoders for the remaining layers arc selected to be orthogonal to the other UEs precoders thereby providing good performance wide minimizing DMRS port usage. Specifically, no additional DMRS ports are needed for spatial diversity transmission.

Transmit diversity on a control channel without additional reference signals

A method comprises controlling a mobile device comprising one or more wireless interfaces, one or more applications that require the mobile device to communicate wirelessly, and a database, to perform measuring power consumption during wireless communication in each of a plurality of circumstances in which one or more conditions are present for plural combinations of the one or more applications, and the one or more wireless interfaces and/or available access points, for each measurement of power consumption, recording in the database the measured power consumption () along with: information on the associated one or more conditions, and indicators identifying the one of the one or more applications and the one of the one or more wireless interfaces and/or access points (), detecting a requirement of a first one of the one or more applications for wireless communication (), utilizing the database and information on current conditions to identify the wireless interface and/or access point that might be expected to cause the lowest power consumption (), and using the identified interface and/or access point to allow the first application to communicate wirelessly ().

Controlling a mobile device

Communication systems may benefit from signaling for resource mapping. For example, third generation partnership project (3GPP) long term evolution advanced (LTE-Advanced) may benefit from signaling for enhanced downlink control channel (ePDCCH) resource mapping in support of coordinated multipoint (CoMP) transmission.

Signaling for ePDCCH resource mapping in the support of CoMP

The specification and drawings present a new method, apparatus and software related product (e.g., a computer readable memory) for aggregation of a new carrier type by configuring PCC (for PCell) and SCC (for SCell) bandwidths to be overlapped or at least partially overlapped and by control signaling, e.g., using PDCCH and/or E-PDCCH, for scheduling of data resources on SCC thus simultaneously serving legacy and non-legacy UEs, e.g., in LTE-A systems.

Aggregation for a new carrier type

Communication systems may benefit from an HSPA MIMO receiver configured for receipt of an imbalanced transmit signal, as well as a method for operating the receiver. According to certain embodiments, a method can include receiving a multiple-input multiple-output system communication signal comprising at least one primary signal at a first power level from a first antenna and a secondary signal at a second power level different from the first power level from a second antenna. The method can also include estimating at least one parameter of the communication signal. The method can further include applying the at least one parameter as estimated to calculate linear minimum mean square error coefficients. The method can additionally include applying the linear minimum mean square error coefficients to process the communication signal.

Methods and devices for receipt of imbalanced transmission signal

A user equipment UE reports its UE-specific channel quality to the network. The network uses this to narrow a search space in which the UE looks for its downlink control signaling. In one embodiment the search space is defined by downlink signaling the network sends. The width of the search space may also select between types of downlink control signaling (for example, between PDCCH and E-PDCCH). In the specific examples described the poorest channel qualities result in the whole-bandwidth PDCCH being used while better channel qualities result in progressively narrower search spaces to look for an E-PDCCH.

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Espoo, Finland

Honglei Miao