Patent application number | Description | Published |
20110185249 | Spatial Multiplexing Communication System With Enhanced Codeword Mapping With Flexible Rate Selection On Each Spatial Layer And With Single HARQ Process - A method of data transmission includes encoding an information block according to a predetermined retransmission protocol to generate, for a single hybrid automatic repeat request (HARQ) instance, a transport block having information bits and error detection bits and channel coding different parts of said transport block using different modulation and coding schemes to generate one or more codewords for transmission to a receiving station. | 07-28-2011 |
20110200135 | Signaling of Precoder Related Information in a MIMO System - Techniques are disclosed for signaling a pattern of cyclic shifts and orthogonal cover codes for use by a wireless device in multi-layer transmissions. In one example method, a signal includes B bits for identifying a reference signal is received, wherein each of several available reference signals is defined by a cyclic shift and an orthogonal cover code. The B bits are used to identify the cyclic shift and orthogonal cover code according to pre-determined tables that map each value of the B bits to a pattern of cyclic shift and orthogonal cover code combinations for a multi-layer transmission scheme. The patterns for the multi-layer transmission scheme include first and second patterns based on the same cyclic shifts, but where some, but not all, of the cyclic shifts in the first pattern are associated with the same corresponding orthogonal cover codes in the second pattern. | 08-18-2011 |
20110222624 | Methods and Apparatuses for Multiple Access in a Wireless Communication Network using DCT-OFDM - The present invention provides an advantageous transmitter apparatus and associated method, for generating a Single-Carrier Discrete Cosine Transform (SC-DCT) OFDM signal for transmission. These transmit-side innovations include circuit configuration and signal processing methods for mapping K | 09-15-2011 |
20110249632 | Scheduling Retransmissions for Contention-Based Access - A base station supports a contention-based channel and a schedule-based channel. If too many mobile terminals simultaneously transmit on the contention-based channel, the base station schedules retransmissions to those terminals on the schedule-based channel. Supporting this, a terminal transmits a user transmission on the contention-based channel that includes both a data transmission and a reference signal. The terminal derives this reference signal by selecting one of a plurality of cyclic shifts (CSs). Correspondingly, the base station receives the user transmission and can determine the selected CS even if it is unable to demodulate the data transmission. The base station then determines a retransmission identifier (RTI) mapped to that CS, according to a mapping between CSs and RTIs, and sends scheduling information for any needed retransmission to the terminal by addressing that information to the RTI. Meanwhile, the terminal knows this mapping and monitors for scheduling information addressed to that RTI. | 10-13-2011 |
20110317596 | OPTIMIZED SIGNALING OF DEMODULATION REFERENCE SIGNAL PATTERNS - Orthogonality in cyclic shift (CS) and orthogonal cover code (OCC) selection for DMRS in MIMO is improved by new n | 12-29-2011 |
20120099666 | Method and Arrangement for Adapting a Signal in a Wireless Communications Network - According to an aspect of the present invention, the power efficiency of a precoded OFDM signal is improved by a method in a network node | 04-26-2012 |
20120170525 | EFFICIENT INFORMATION MAPPING FOR TRANSMISSION GRANTS - Methods and apparatus for signaling an implicit signaling bit in a scheduling grant message are disclosed, including the implicit signaling of parameters related to the configuration of sounding reference signals. In various embodiments, implicit signaling is achieved by observing that certain codepoints in downlink control information formats are unused for certain scheduling assignments. The information content of certain information fields in the DCI format are redesigned to exploit this unused bandwidth, allowing the implicit signaling of one or more bits that can be used to extend the number of SRS configurations that can be specified in the DCI. In alternative embodiments, the implicit signaling concept is exploited in order to reduce the signaling payload while maintaining flexibility in dynamically assigning different SRS configurations by way of scheduling grant messages. | 07-05-2012 |
20120182944 | METHODS AND ARRANGEMENTS FOR SIGNALING CHANNEL STATE INFORMATION - Particular embodiments provide a method in a network node ( | 07-19-2012 |
20120275393 | Resource Allocation of Reference Signals in Multi-Carrier Systems - Downlink control information, DCI, messages used for signaling downlink resource grants are employed for triggering sounding reference signal transmission in the uplink. An index of the uplink component carrier that should be used for the transmission is derived from SIB-2 linking between the downlink component carrier targeted by the downlink DCI message and one of the uplink component carriers configured for the mobile station, when the linking is available. In some cases the downlink component carrier targeted by the downlink DCI message is identified by a carrier identification field in the downlink DCI. Variants of the disclosed techniques involve a default uplink component carrier, which is used in the event that the SIB-2 based allocation is not possible or desired. The default uplink component carrier can be statically defined or semi-statically signaled by Radio Resource Control, RRC, signaling. | 11-01-2012 |
20120320956 | Channel Estimation in a Wireless Communication System - An estimator ( | 12-20-2012 |
20120329503 | Systems and Methods For Controlling The Power at Which a Communication Device Transmits an Uplink Signal - According to some embodiments, there is provided a base station system configured to, among other things, (a) detect whether a particular UE is using too much power to transmit uplink data and (b) in response, transmit a message to the UE instructing the UE to detect a power control RS (PCRS) that is intended only for the particular UE. In some embodiments, the PCRS is transmitted such that the power (actual or nominal) of the PCRS as received by the UE is higher than the power of the previous CRS detected by the UE, thereby leading the UE to calculate a lower PL value, which can lead to the UE lowering its output power. | 12-27-2012 |
20130039285 | Methods and Apparatuses for Handling Reference Signals in a Cellular Network - Methods and apparatuses for enabling a configured demodulation reference signal to be transmitted from a User Equipment, UE, ( | 02-14-2013 |
20130040675 | CLOSED LOOP POWER CONTROL IN A HETEROGENEOUS NETWORK BY SELECTING AMONG SETS OF ACCUMULATIVE POWER STEP VALUES - A method is provided in a wireless device for controlling output transmission power from the wireless device. A set is selected among a plurality of sets of power step values, which reside in a memory of the wireless device, responsive to criteria defined in the wireless device. A power control command is received from a radio network node. One of the power step values of the selected set is selected responsive to the power control command. The output transmission power from the wireless device is controlled responsive to the selected power step value. Related methods in radio network nodes and apparatuses are disclosed. | 02-14-2013 |
20130072241 | Method and Device for Handling Base Sequences in a Communications Network - The embodiments herein relate to a method in a network node ( | 03-21-2013 |
20130100926 | METHODS AND DVEICES FOR HANDLING REFERENCE SIGNALS IN A COMMUNICATIONS NETWORK - Methods in a first user equipment are provided for handling reference signals in a communications network. The user equipment is configured to receive a signal from a base station. The signal comprises a first slot and a second slot. The first slot comprises a first reference signal and the second slot comprises a second reference signal. The user equipment receives, from the base station, information that the first reference signal should be assigned to the second slot and that the second reference signal should be assigned to the first slot. The user equipment assigns the first reference signal to the second slot and the second reference signal to the first slot. The first user equipment processes the first reference signal assigned to the second slot and the second reference signal assigned to the first slot. | 04-25-2013 |
20130170441 | Sequence Derivation for Reference Signal Patterns - A reference signal, RS, is generated in a wireless communication system based on a starting position, in the frequency domain, of the RS and a transmission channel bandwidth of the RS. At least one of the starting position of the RS and the bandwidth allocated to a transmission channel for the RS is/are ascertained. A base sequence index, BSI, is then derived by mapping at least one ascertained of the RS starting position and transmission channel bandwidth ( | 07-04-2013 |
20130201840 | METHODS AND ARRANGEMENTS FOR CHANNEL ESTIMATION - Some embodiments provide a method for channel estimation in a wireless device. According to the method, the wireless device obtains an indication that a set of antenna ports, or antenna port types, share at least one channel property. The wireless device then estimates one or more of the shared channel properties based at least on a first reference signal received from a first antenna port included in the set, or having a type corresponding to one of the types in the set. Furthermore, the wireless device performs channel estimation based on a second reference signal received from a second antenna port included in the set, or having a type corresponding to one of the types in the set, wherein the channel estimation is performed using at least the estimated channel properties. | 08-08-2013 |
20130259098 | Signaling of Sequence Generator Initialization Parameters for Uplink Reference Signal Generation - A base station initializes pseudo-random sequence generators on which wireless devices base generation of uplink reference signals. The base station determines a first sequence from a first subset of possible initialization sequences for a sequence generator of a first device, and determines a second sequence from a second subset of possible initialization sequences for a sequence generator of a second device. The range of this second subset spans at least the range of the first subset. The base station further encodes the first sequence as a first set of two or more parameters, and encodes the second sequence as a second set of one or more parameters. This second set includes at least one parameter not included in the first set, and comprises fewer bits than the first set. The base station initializes the sequence generators by transmitting the first and second sets of parameters to the devices. | 10-03-2013 |
20130301571 | SELECTION OF UPLINK CONTROL TRANSMISSION FORMAT PARAMETERS BASED ON CONTENT OF THE UPLINK CONTROL TRANSMISSION - Systems and methods for transmitting uplink control signals in a cellular communications network are disclosed. In one embodiment, a wireless device configured to operate in a cellular communications network includes a radio subsystem and a processing subsystem. The processing subsystem selects a value for at least one parameter for an uplink control channel format based on content to be transmitted in an uplink control channel transmission according to the uplink control channel format. The processing subsystem then transmits, via the radio subsystem, the content in an uplink control channel transmission according to the uplink control channel format and the value for the at least one parameter for the uplink control channel format selected based on the content. | 11-14-2013 |
20130308588 | OPTIMIZED SIGNALING OF DEMODULATION REFERENCE SIGNAL PATTERNS - Orthogonality in cyclic shift (CS) and orthogonal cover code (OCC) selection for DMRS in MIMO is improved by new n | 11-21-2013 |
20130310059 | Soft Cell Inter-Layer Interference Handling - In a heterogeneous cell deployment a mobile terminal may need to receive control data transmissions from a macro node at the same time as a pico node is transmitting user data for the mobile terminal, using the same frequency or set of frequencies. This can result in a problematic interference situation. According to several embodiments of the present invention, at least one of two general approaches is used to mitigate the interference situation described above. In a first approach, the pico node's transmission power is reduced in some time intervals, thereby reducing the interference to a level where reception from the macro node is possible. In a second approach, which may be combined with the first approach in some cases, the data transmitted from the macro node is provided by the pico node, either alone or in combination with the macro node. | 11-21-2013 |
20130315212 | METHODS, SYSTEMS AND DEVICES FOR DECOUPLED INTERFERENCE RANDOMIZATION FOR UPLINK REFERENCE SIGNALS - Interference between reference signals from user equipments in a wireless network, the method may be reduced by using a received time shift value from a node in the wireless network. An interference randomization technique may be applied to a reference signal and a sequence may be generated based on the reference signal to which the interference randomization technique has been applied. A processed reference signal may be derived by applying a time shift based on the time shift value to the sequence. The processed reference signal may be transmitted to the node. Related systems, methods, nodes and wireless devices are also described. | 11-28-2013 |
20140036800 | QUASI CO-LOCATED ANTENNA PORTS FOR CHANNEL ESTIMATION - Systems and methods are disclosed for estimating one or more channel properties of a downlink from a cellular communications network based on quasi co-located antenna ports with respect to the one or more channel properties. In one embodiment, a wireless device receives a downlink subframe including a downlink control channel from the cellular communications network. The wireless device estimates one or more large-scale channel properties for an antenna port of interest in the downlink control channel based on a subset of reference signals that correspond to antenna ports in the cellular communications network that are quasi co-located with the antenna port of interest with respect to the one or more large-scale channel properties. As a result of using the quasi co-located antenna ports, estimation of the one or more large-scale channel properties is substantially improved. | 02-06-2014 |
20140071902 | Method and Apparatus for Uplink Power Control in a Wireless Communication Network - According to the teachings herein, an LTE or other wireless communication network provides for independent control of SRS transmissions by a UE or other wireless device. The network advantageously sends DCI messages for SRS power control using a modified format 3/3A, where the message length conforms to that used for conventional format 3/3A messages but where the message is masked using a distinct RNTI. Correspondingly, the wireless device is configured to recognize from the distinct RNTI that the received TPC commands are targeted to controlling the uplink transmit power used by the wireless device for SRS transmissions. | 03-13-2014 |
20140071903 | Closed Loop Power Control Commands for SRS - According to one aspect of the teachings herein, a set of rules for transmitting Downlink Control Information (DCI) messages containing Transmit Power Control (TPC) commands is known to a wireless communication network ( | 03-13-2014 |
20140078972 | Method and Apparatus for Signaling Demodulation Reference Signals - The teachings herein disclose device-side and network-side methods ( | 03-20-2014 |
20140092827 | USER EQUIPMENT, RADIO NETWORK NODE AND METHODS THEREIN - Embodiments herein relate to a method in a user equipment ( | 04-03-2014 |
20140105042 | Methods and Arrangements for Reference Signal Measurements - Embodiments are disclosed which improve the accuracy of measurement quantities obtained based on filtered measurements, by enabling filter memory reset events triggered by specific configuration and/or reconfiguration commands. According to some embodiments, a method for obtaining a measurement quantity is provided. The measurement quantity is based on a filtered reference signal (RS) measurement value. The method is executed in a wireless device, e.g. a user equipment (UE). According to the method, the wireless device receives ( | 04-17-2014 |
20140112260 | Reference Signals in Wireless Communication - A method in a wireless device ( | 04-24-2014 |
20140113677 | USER EQUIPMENT AND A METHOD THEREIN FOR TRANSMISSION POWER CONTROL OF UPLINK TRANSMISSIONS - A UE and a method therein for transmission power control of uplink transmissions are provided. The method comprises receiving, through signalling a configuration indicating at least one reference signal, RS, and a reference transmission power level for each indicated RS. The method further comprises measuring received power of the indicated at least one RS, and for each measured received power, determining a pathloss, PL, based on the measured received power and the reference transmission power level for each measured received power. The method further comprises determining an uplink transmission power based on at least one determined PL. | 04-24-2014 |
20140153545 | HANDOVER IN A SOFT CELL NETWORK - Devices and methods for making a determination whether or not to handover a user equipment (UE) from a serving cell to a target cell are disclosed. The decision is based on a comparison that includes both control plane and data plane link quality considerations. The disclosed devices and methods may be applied to handover determinations in heterogeneous networks that implement a soft cell configuration. | 06-05-2014 |
20140185702 | METHODS AND APPARATUSES FOR MULTIPLE ACCESS IN A WIRELESS COMMUNICATION NETWORK USING DCT-OFDM - The present invention provides an advantageous transmitter apparatus and associated method, for generating a Single-Carrier Discrete Cosine Transform (SC-DCT) OFDM signal for transmission. These transmit-side innovations include circuit configuration and signal processing methods for mapping K | 07-03-2014 |
20140192756 | REFERENCE SIGNAL GENERATION TECHNIQUE - A technique for generating a reference signal for use in a communication system in which for reference signal generation multiple base sequences are defined is presented. A method implementation of the technique comprises generating a first reference signal sequence from a first base sequence and a second reference signal sequence from a second base sequence. A reference signal is generated that comprises the first reference signal sequence and the second reference signal sequence. The first reference signal sequence occupies a first spectral fragment of the reference signal, and the second reference signal sequence occupies a second spectral fragment of the reference signal. The second spectral fragment and the first spectral fragment do not overlap. | 07-10-2014 |
20140198763 | Method and Apparatus for Reference Signal Transmission and Reception - In one aspect, the teachings herein disclose methods and apparatuses for improved reference signal reception in a wireless device configured for operation in a wireless communication network. In one embodiment, the network provides assistance information that indicates a received timing or frequency offset of a second reference signal relative to a first reference signal that is transmitted from a first antenna port. The second reference signal is transmitted by the wireless communication network from a second antenna port that is quasi co-located with the first antenna port with respect to timing, frequency and/or delay spread, and the wireless device is configured to use the assistance information to configure its receiver timing and/or frequency offset for reception of the second reference signal. Such operation reduces the “search” space in time and/or frequency needed at the wireless device, thereby improving and simplifying reception of the second reference signal. | 07-17-2014 |
20140211835 | Signaling of Sequence Generator Initialization Parameters for Uplink Reference Signal Generation - A base station initializes pseudo-random sequence generators on which wireless devices base generation of uplink reference signals. The base station determines a first sequence from a first subset of possible initialization sequences for a sequence generator of a first device, and determines a second sequence from a second subset of possible initialization sequences for a sequence generator of a second device. The range of this second subset spans at least the range of the first subset. The base station further encodes the first sequence as a first set of two or more parameters, and encodes the second sequence as a second set of one or more parameters. This second set includes at least one parameter not included in the first set, and comprises fewer bits than the first set. The base station initializes the sequence generators by transmitting the first and second sets of parameters to the devices. | 07-31-2014 |
20140211885 | Signaling of Sequence Generator Initialization Parameters for Uplink Reference Signal Generation - A base station initializes pseudo-random sequence generators on which wireless devices base generation of uplink reference signals. The base station determines a first sequence from a first subset of possible initialization sequences for a sequence generator of a first device, and determines a second sequence from a second subset of possible initialization sequences for a sequence generator of a second device. The range of this second subset spans at least the range of the first subset. The base station further encodes the first sequence as a first set of two or more parameters, and encodes the second sequence as a second set of one or more parameters. This second set includes at least one parameter not included in the first set, and comprises fewer bits than the first set. The base station initializes the sequence generators by transmitting the first and second sets of parameters to the devices. | 07-31-2014 |
20140219152 | Method and an Apparatus in a User Equipment for Controlling Transmission Power of the User Equipment - Disclosed are methods and apparatuses in user equipments ( | 08-07-2014 |
20140233494 | Methods and Apparatuses for Handling Reference Signals in a Cellular Network - Methods and apparatuses for enabling a configured demodulation reference signal to be transmitted from a User Equipment, UE, ( | 08-21-2014 |
20140233539 | Soft Cell Inter-Layer Interference Handling - In a heterogeneous cell deployment a mobile terminal may need to receive control data transmissions from a macro node at the same time as a pico node is transmitting user data for the mobile terminal, using the same frequency or set of frequencies. This can result in a problematic interference situation. According to several embodiments of the present invention, at least one of two general approaches is used to mitigate the interference situation described above. In a first approach, the pico node's transmission power is reduced in some time intervals, thereby reducing the interference to a level where reception from the macro node is possible. In a second approach, which may be combined with the first approach in some cases, the data transmitted from the macro node is provided by the pico node, either alone or in combination with the macro node. | 08-21-2014 |
20140301316 | SIGNALING OF PRECODER-RELATED IFNORMATION IN A MIMO SYSTEM - Techniques are disclosed for signaling a pattern of cyclic shifts and orthogonal cover codes for use by a wireless device in multi-layer transmissions. In one example method, a signal includes B bits for identifying a reference signal is received, wherein each of several available reference signals is defined by a cyclic shift and an orthogonal cover code. The B bits are used to identify the cyclic shift and orthogonal cover code according to pre-determined tables that map each value of the B bits to a pattern of cyclic shift and orthogonal cover code combinations for a multi-layer transmission scheme. The patterns for the multi-layer transmission scheme include first and second patterns based on the same cyclic shifts, but where some, but not all, of the cyclic shifts in the first pattern are associated with the same corresponding orthogonal cover codes in the second pattern. | 10-09-2014 |
20140307642 | Method and Wireless Device for Managing Resources for D2D Communication - A method and a wireless device ( | 10-16-2014 |
20140307643 | Wireless Device and Method for Selecting Uplink Transmission Parameters - The present invention relates to a method for selecting a set of uplink transmission parameters. The method is performed in a wireless device of a radio communications system. The method comprises obtaining information mapping resources of a physical downlink control channel region to at least two sets of uplink transmission parameters. The method also comprises receiving a downlink control message on a resource of the physical downlink control channel region, and selecting a set among the at least two sets of uplink transmission parameters. The selection of set is based on the resource of the physical downlink control channel region on which the downlink control message is received, and on the obtained information mapping resources of the physical downlink control channel region to the at least two sets of uplink transmission parameters. | 10-16-2014 |
20140307699 | USER EQUIPMENT, A RADIO BASE STATION, RBS, AND METHODS THEREIN FOR TRANSMITTING A SUBFRAME COMPRISING AT LEAST TWO REFERENCE SIGNALS, RSS, TO THE RBS - A method in a UE comprises: receiving, from an RBS, information regarding a base sequence and a first phase rotation speed of the base sequence; determining an order, L, of the IFDMA, indicating a spacing between subcarriers over which the base sequence is to be mapped in the frequency domain; generating an RS-specific second phase rotation speed of the base sequence based on a CS pseudo random offset; increasing at least the second phase rotation speed based on L; combining the first and the increased second phase rotation speeds to obtain a third phase rotation speed, and performing phase rotation of the base sequence based on the third phase rotation speed; and mapping the phase rotated base sequence to every L:th subcarrier of the RSs, and transmitting the RSs. | 10-16-2014 |
20150056982 | Methods and Network Nodes for Management of Resources - A wireless device ( | 02-26-2015 |
20150092756 | METHODS, APPARATUSES, AND COMPUTER PROGRAM PRODUCTS FOR GENERATING FRACTIONAL GUARD PERIODS - A method, system, and computer program product is provided for transmitting output symbols in sub-slots that each have a pre-determined length. A UE generates a first output symbol having a first symbol length, and transmits the first output symbol with a guard period having a guard period length. During the guard period, no transmission is made by the UE. The sum of the first symbol length and the guard period length is less than or equal to the predetermined length. Further, the UE generates a plurality of other output symbols that each have the predetermined length. Then, immediately following the transmission of the first output symbol, the UE transmits the plurality of other output symbols. | 04-02-2015 |
20150111568 | Methods and Arrangements for Channel Estimation - Some embodiments provide a method for channel estimation in a wireless device. According to the method, the wireless device obtains ( | 04-23-2015 |
20150111586 | METHOD AND WIRELESS DEVICE FOR PROVIDING DEVICE-TO-DEVICE COMMUNICATION - The present disclosure relates to methods and to a wireless device, | 04-23-2015 |
20150133102 | TRIGGERING OF DIRECT DISCOVERY SIGNALS - Embodiments of systems and methods enabling Device-to-Device (D2D) discovery in a cellular network assisted D2D communication system are disclosed. In some embodiments, a method of operation of a wireless device comprises receiving at least one trigger for D2D discovery from a controlling node of the wireless device in a cellular communications network. The method of operation of the wireless device further comprises transmitting multiple transmission instances of a discovery signal of the wireless device for a D2D discovery event in response to the at least one trigger using resources selected from a group consisting of: different time resources, different frequency resources, different code resources, different time and frequency resources, different time and code resources, different frequency and code resources, and different time, frequency, and code resources. In this manner, detection of the discovery signal by other proximate wireless devices is substantially improved. | 05-14-2015 |
20150181570 | NETWORK NODE AND A METHOD THEREIN FOR SCHEDULING A DOWNLINK DATA TRANSMISSION TO A UE, AND A UE AND A METHOD THEREIN FOR RECEIVING A DOWNLINK DATA TRANSMISSION - A network node, a UE and respective methods therein are provided for enabling transmission of data using a resource element reserved for CRS. The method in the network node for scheduling a downlink data transmission to the UE currently connected to the network node, comprises determining to schedule data transmission to the UE using at least one resource element reserved for transmitting CRSs during at least one subframe; and transmitting data to the UE using the at least one resource element reserved for transmitting the at least one CRS during the at least one subframe. | 06-25-2015 |
20150207605 | OPTIMIZED SIGNALING OF DEMODULATION REFERENCE SIGNAL PATTERNS - Orthogonality in cyclic shift (CS) and orthogonal cover code (OCC) selection for DMRS in MIMO is improved by new n | 07-23-2015 |
20150215833 | RAT SELECTION FOR DEVICES CAPABLE OF DEVICE-TO-DEVICE (D2D) COMMUNICATION - Systems and methods for Radio Access Technology (RAT) selection for devices capable of Device-to-Device (D2D) communication are disclosed. In some embodiments, a method of operation of a wireless device in a cellular communications network is provided. The method includes camping on a first cell on a first carrier, where the first cell does not support D2D communication. The method also includes, during a first time interval when the first cell satisfies one or more criteria for the wireless device to remain camped on the first cell, monitoring at least one second carrier on a set of pre-configured radio resources for at least one of the group consisting of: a second cell that supports D2D communication, a signal from a second wireless device that supports D2D communication, and D2D communication. | 07-30-2015 |
20150215881 | USER EQUIPMENT, A NETWORK NODE AND METHODS THEREIN FOR PERFORMING AND ENABLING DEVICE-TO-DEVICE (D2D) COMMUNICATION IN A RADIO COMMUNICATIONS NETWORK - A method performed by a first user equipment for performing Device-to-Device, D2D, communications with a second user equipment is provided. The first user equipment determines that a valid timing reference is not present in the first user equipment. Also, the first user equipment determines whether a preconfigured timing advance can be used in the D2D communication. Then, when determined that the preconfigured timing advance can be used, the first user equipment transmits a D2D signal to the second user equipment with a timing using the preconfigured timing advance to perform D2D communication. | 07-30-2015 |
20150223111 | Method and Apparatus for Device-to-Device Transmissions - This disclosure presents a method and apparatus for mitigating interference arising from Device-to-Device, D2D, communications, in cases where the frequency band used for D2D transmissions is adjacent to an active cellular carrier or other frequency band carrying critical communications. Among the several mitigation techniques disclosed herein, a wireless device may reduce possible out-of-band interference arising from its D2D transmissions by adjusting transmit power and/or time/frequency resource allocations when it is determined that there is an interference risk. Such mitigations provide improved performance for the D2D transmissions and for the communications in the critical frequency band. | 08-06-2015 |
20150244507 | Reference Signal Mapping - An example method of mapping a set of reference signal samples to subcarriers is disclosed. First and second subsets of samples having contiguous index values are determined. The second subset of samples are mapped to a first subset of subcarriers, such that a first sample of the second subset of samples having a lowest index value of the second subset of samples is mapped to a first subcarrier at a first end of a bandwidth. The first subset of samples are mapped to a second subset of subcarriers of the bandwidth, such that a last sample of the first subset of samples having a highest index value of the first subset of samples is mapped to a last subcarrier at an opposite second end of the bandwidth. A complementary method of demapping subcarriers is also disclosed. | 08-27-2015 |
20150289264 | Transmission and Reception of Reference Signals in Wireless Networks - The enclosed embodiments relate to transmission and reception of reference signals on sub-carriers of a time frequency grid in a wireless network. Resource configuration for transmission of reference signals is obtained by a wireless device. A reference signal received power, RSRP, reference signal, RSRP-RS, is transmitted by the wireless device according to the resource configuration. The RSRP-RS is mapped to every J:th sub-carrier, where J>2. The RSRP-RS is received by a network node. | 10-08-2015 |
20150304834 | Methods and Arrangements for Device Discovery - The present disclosure relates to methods and devices for transmission of discovery signal signals and detection of discovery signal signals for device-to-device communication. According to some aspects, the disclosure relates to a method executed in a second wireless terminal for discovering a first wireless terminal, wherein the second wireless terminal | 10-22-2015 |
20150312908 | METHODS, SYSTEMS AND DEVICES FOR DECOUPLED INTERFERENCE RANDOMIZATION FOR UPLINK REFERENCE SIGNALS - Interference between reference signals from user equipments in a wireless network, the method may be reduced by using a received time shift value from a node in the wireless network. An interference randomization technique may be applied to a reference signal and a sequence may be generated based on the reference signal to which the interference randomization technique has been applied. A processed reference signal may be derived by applying a time shift based on the time shift value to the sequence. The processed reference signal may be transmitted to the node. Related systems, methods, nodes and wireless devices are also described. | 10-29-2015 |
20150341934 | Methods and Apparatuses for Radio Resource Management - A radio resource allocation method in a communication node is disclosed. The method comprises determining ( | 11-26-2015 |
20150349855 | Autonomous Quasi Co-Location Status Redefinition by Receiver in Coordinated Multipoint Downlink - User Equipment, UE ( | 12-03-2015 |
20150350930 | METHOD AND DEVICE FOR HANDLING BASE SEQUENCES IN A COMMUNICATIONS NETWORK - A method in a network node, a network node, a method in a user equipment and a user equipment handle base sequences in a communications network. The network node is configured to communicate with a user equipment. The network node, which has information about a default base sequence and an alternative base sequence, determines that the alternative base sequence should replace the default base sequence for the user equipment. The network node then sends information about the alternative base sequence to the user equipment. | 12-03-2015 |
20150358920 | HANDLING UPLINK TRANSMIT POWER REPORTING - Methods and arrangements for handling uplink transmit power reporting in a radio access network of a cellular radio system. A wireless terminal provides a respective transmit power report for at least one of multiple uplink reference signal transmission configurations comprised in the wireless terminal. Each configuration caused the wireless terminal to configure a transmission of an uplink reference signal that is to be received by the network node. The respective transmit power report provides information about a transmit power used by the wireless terminal for transmitting the uplink reference signal. The wireless terminal sends the respective transmit power report to a network node of the cellular radio system. | 12-10-2015 |
20150382315 | Direct Control Signaling in a Wireless Communication System - A first wireless communication device ( | 12-31-2015 |
20160050702 | A METHOD AND WIRELESS DEVICE FOR PROVIDING DEVICE-TO-DEVICE COMMUNICATION - The present disclosure relates to methods and to wireless devices for device-to-device communication. One of the methods includes configuring direct control messages and reference signals, based on capability and state of the wireless device with regards to device to device communication. The method further includes associating, in the wireless device, at least one direct control message to a synchronisation reference signal, configuring the at least one direct control message and/or the synchronisation reference signal, such that a recipient can identify the association between the at least one direct control message and the synchronisation reference signal, using the configuration of the direct control message and/or the synchronisation reference signal. The at least one direct control message is then transmitted. | 02-18-2016 |
20160057718 | Methods and Wireless Devices for Enabling Synchronization in D2D Communications - A first and a second wireless device and a respective method performed thereby for enabling D2D communication there between are provided. The method performed by the first wireless device comprises obtaining ( | 02-25-2016 |
20160088596 | QUASI CO-LOCATED ANTENNA PORTS FOR CHANNEL ESTIMATION - Systems and methods are disclosed for estimating one or more channel properties of a downlink from a cellular communications network based on quasi co-located antenna ports with respect to the one or more channel properties. In one embodiment, a wireless device receives a downlink subframe including a downlink control channel from the cellular communications network. The wireless device estimates one or more large-scale channel properties for an antenna port of interest in the downlink control channel based on a subset of reference signals that correspond to antenna ports in the cellular communications network that are quasi co-located with the antenna port of interest with respect to the one or more large-scale channel properties. As a result of using the quasi co-located antenna ports, estimation of the one or more large-scale channel properties is substantially improved. | 03-24-2016 |
20160088607 | DEVICES AND METHODS FOR D2D SYNCHRONIZATION SIGNALLING - Embodiments herein relate to a receiver device; a method therein; a transmitter device and a method therein. The transmitter device is configured to transmit to the receiver device a device-to-device synchronization signal during a time window preceding the start of a resource pool. The transmitter device is further configured to transmit a discovery message during the resource pool. The discovery message includes the identity of the transmitter device for enabling the transmitter device and the receiver device to synchronize to each other. | 03-24-2016 |
20160100345 | Activation and Deactivation of a Secondary Cell for Device-to-Device User Equipment - According to some embodiments, a wireless communication device ( | 04-07-2016 |