1176 results about "Resource element" patented technology

A control channel configuration method and apparatus is provided for supporting Inter-Cell Interference Coordination (ICIC) in an OFDM-based communication system. The control channel configuration method includes determining a Resource Block (RB) to be used for configuring control channels; configuring the control channels by mapping the control channels in a data channel region within the RB; and transmitting the configured control channels, wherein configuring the control channels includes mapping the control channels in units of Resource Element Groups (REGs) formed by binding one or more Resource Elements (REs) in a time domain-preferred allocation manner within the same RB.

Techniques for transmitting signals on shared resources in a manner to detect and / or combat collision are described. In an aspect, a terminal may transmit a signal on a subset of resource elements in a resource block, and at least one null resource element with no signal may be used to detect for collision of the signal. In another aspect, different terminals may simultaneously transmit their signals on different subsets of resource elements in a resource block. These different subsets of resource elements may be pseudo-randomly selected to randomize interference. In one design, a terminal may determine a resource block to use for transmission of a signal, select a subset of the resource elements in the resource block, and transmit the signal on the selected resource elements, e.g., to at least one other terminal for peer-to-peer communication. The signal may be a peer discovery signal, a paging signal, etc.

A base station for use in a wireless network capable of communicating with a plurality of mobile stations. The base station transmits to a first mobile station downlink subframes of OFDM symbols. Each downlink subframe comprises a plurality of resource blocks and is associated with a subframe (SF) type that is determined according to whether or not a PDSCH region of a resource block in a downlink subframe includes at least one of: 1) a cell-specific reference signal (CRS) resource element and 2) a channel-state-information reference signal (CSI-RS) resource element. The base station receives from the first mobile station at least one of COI, PMI, modulation scheme, and transport block size and interprets the received at least one of COI, PMI, modulation scheme, and transport block size according to a default SF type used by the first mobile station to determine the at least one of COI, PMI, modulation scheme, and transport block size.

A wireless communication system includes a number of base stations capable of communicating with a plurality of subscriber stations. The base station coordinates transmission of resource blocks with a transmission of resource blocks from a second base station. The resource blocks include at least one reference signal (RS) patterns. In addition, base station punctures a plurality of resource elements in the resource blocks that might overlap with one of the CRS patterns in another resource block transmitted by the second base station such that no data is transmitted in the plurality of punctured resource elements. The subscriber station receives the resource blocks from at least two base stations and can avoid reading data from the resource elements that might overlap.

A method is provided for allocating resources of a control channel in a mobile communication system using Orthogonal Frequency Division Multiplexing (OFDM). The method includes, when a time index and a frequency index of available Resource Elements (REs) are defined as l and k, respectively, dividing the available REs in a two-dimensional structure of (k, l); and time-first-allocating each RE to a plurality of RE groups while increasing the time index l for each frequency index k from an initial value up to a predetermined range.

A method for transmitting a demodulation reference signal (DMRS) for down-link multi-user MIMO transmission according to an embodiment of the present invention comprises the steps of: mapping a DMRS for a first layer on a down-link physical resource block according to a first DMRS pattern; mapping a DMRS for a second layer on the down-link physical resource block according to a second DMRS pattern; and transmitting the down-link physical resource block. In the down-link physical resource block, a resource element corresponding to the second DMRS pattern can be punctured on the first layer and a resource element corresponding to the first DMRS pattern can be punctured on the first layer and a resource element corresponding to the first DMRS pattern can be punctured on the second layer.

A method for mapping a physical hybrid automatic repeat request indicator channel (PHICH) is described. The method for mapping a PHICH includes determining an index of a resource element group transmitting a repetitive pattern of the PHICH, according to a ratio of the number of available resource element groups in a symbol in which the PHICH is transmitted and the number of available resource element groups in a first or second OFDM symbol, and mapping the PHICH to the symbol according to the determined index. In transmitting the PHICH, since efficient mapping is performed considering available resource elements varying with OFDM symbols, repetition of the PHICH does not generate interference between neighbor cell IDs and performance is improved.

The invention relates to a new structure of a control channel region within a sub-frame of a 3GPP-based based communication system using OFDM in the downlink. This new structure of a control channel region is inter alia particularly suitable for conveying physical downlink control channel information from a donor eNodeB to a relay node. The control channel region is divided in CCEs that have equal size irrespective of the presence of further cell-specific and / or UE-specific reference signals within the control channel region. This is achieved by dividing the control channel region in plural sub-CCEs that are combined to CCEs all having equal size (in terms of resource elements that can be used for the signaling of control information). The control channel region is divided in the frequency domain and / or time domain in a FDM respectively TDM fashion in order to obtain the sub-CCEs

There is proposed a mechanism by means of which resources for a data transmission between a user equipment and a base transceiver station are set. For this purpose, a resource dedicated to the user equipment (like an SR resource) is combined with at least one contention based resource allocated to a contention based transmission by the user equipment (like a CB-PUSCH resource). The at least one contention based resource to be combined is selected by executing a mapping according to a predetermined rule and based on an information indicating a specific resource element dedicated to the user equipment to at least one set of available contention based resources, and by determining an information identifying at least one resource element of the at least one contention based resource.

The invention discloses a method for transmitting downlink control signaling of a LTE-Advanced system and aims to effectively reduce the frequency of a UE blind test. The method comprises the following steps: carrying out first cascade connection of CRC check codes of special DCI and the downlink control signaling; masking the CRC check codes by using RNTI of the UE to obtain a cascade connection mask sequence; coding indication information of the special DCI to obtain a special DCI indication information coding sequence; carrying out coding and speed matching of the cascade connection mask sequence to obtain a cascade connection mask coding sequence; carrying out second cascade connection and reordering of the special DCI indication information coding sequence and the cascade connection mask coding sequence to obtain an information block corresponding to a PDCCH of the UE; and processing and mapping the information blocks of a plurality of PDCCHs of a subframe to resource elements for transmitting. The technical proposal reduces the frequency of the UE blind test, the implementation complexity of UE and the probability of CRC false detection.

A method and an apparatus for transmitting a reference signal in a wireless communication system are provided. A first base station maps a first reference signal to a resource region and transmits the first reference signal to a user equipment. A second base station maps a second reference signal to said resource region and transmits the second reference signal to said user equipment. The resource elements, to which the first reference signal and the second reference signal are mapped in the resource region, are determined in accordance with the index on a Latin square matrix occupied by two different elements, respectively, from among N elements constituting the Latin square matrix with a size of N×N.

A method is described, which includes controlling a coordinated transmission between network control elements and terminals on resource elements, detecting whether a resource element includes a specific element, and selecting a resource element for the coordinated transmission, when it is detected that the resource element does not include a specific element. The application also describes some further aspects to improve a coordinated transmission such as a coordinated multipoint transmission is improved.

A method of allocating resource elements in an orthogonal frequency division multiplexing (OFDM) system for transmission of a channel state information reference signal (CSI-RS) is disclosed. The method includes converting resource elements to a two-dimensional frequency-time domain. The converted resource elements can then be partitioned to units of a physical resource block (PRB), which can be one subframe, for example. It can be determined whether a portion of a PRB is being used by another signal; and if the portion of the PRB is not being used, it can be allocated for transmission of the CSI-RS. The CSI-RS can be transmitted at resource element locations determined by the resource elements available to the CSI-RS in a regular or a frequency-division duplexing (FDD) downlink subframe, for example. The CSI-RS can be transmitted in a downlink subframe configured as a Multi-Media Broadcast over a Single Frequency Network (MBSFN) or a non-MBSFN subframe.

Systems and methods of reducing power consumption associated with paging or cDRX mode are described. A wake-up receiver (WUR) wakes up from an idle mode or cDRX state. Whether a wake-up signal (WUS) has been received by the WUR is determined. The WUS is a low-complexity signal that is less complicated than a PDCCH or PDSCH and is repeated multiple times at resource elements as indicated in a configuration from an eNB. If received, a baseband transceiver wakes up for reception of a PDCCH for the UE in a PO when the UE is in the idle mode or a PDSCH for the UE when the UE is in the cDRX state.

An infrastructure and a set of steps are disclosed for evaluating performance of computer systems. The infrastructure and method provide a flexible platform for carrying out analysis of various computer systems under various workload conditions. The flexible platform is achieved by allowing / supporting independent designation / incorporation of a workload specification and a system upon which the workload is executed. The analytical framework disclosed and claimed herein facilitates flexible / dynamic integration of various hardware models and workload specifications into a system performance analysis, and potentially streamlines development of customized computer software / system specific analyses.The disclosed performance technology infrastructure includes a workload specification interface facilitating designation of a particular computing instruction workload. The workload comprises a list of resource usage requests. The performance technology infrastructure also includes a hardware model interface facilitating designation of a particular computing environment (e.g., hardware configuration and / or network / multiprocessing load). A disclosed hardware model comprises a specification of delays associated with particular resource uses. A disclosed hardware specification further specifies a hardware configuration describing actual resource elements (e.g., hardware devices) and their interconnections in the system of interest. The performance technology infrastructure further comprises an evaluation engine for performing a system performance analysis in accordance with a specified workload and hardware model incorporated via the workload specification and hardware model interfaces.

Disclosed are a method and apparatus for transmitting a reference signal. In a base station apparatus for transmitting a reference signal in a wireless communication system, a processor generates the same scrambling sequence for resource elements (REs) allocated to each layer for reference signal transmission, and spreads or covers Walsh codes such that scrambling sequences generated for the resource elements can be orthogonal to each other on a time axis, in order to generate a reference signal sequence. Here, the Walsh code spreading or covering by the processor is applied on a frequency axis on the basis of a plurality of resource blocks (RBs) or on the basis of a pair of resource blocks, such that mutually different sequences having mutually different sequence values can be mapped between resource blocks or between pairs of resource blocks. A transmission module transmits the reference signal, to which the thus-generated reference signal sequence is applied, to user equipment via each layer.

Methods and apparatuses are described for a User Equipment (UE) to receive enhanced Control CHannels (eCCHs), including enhanced Physical Downlink Control CHannels (ePDCCHs), transmitted in a set of Resource Blocks (RBs) over a Transmission Time Interval (TTI). A method includes transmitting a first control signal to a first UE over a first number of Resource Elements (Res) in a subset of the RBs and over a first number of the transmission symbols in the TTI; transmitting a second control signal to a second UE over a second number of the REs in the subset of the RBs and over a second number of the transmission symbols in the TTI; and transmitting a reference signal of the first type over a third number of the REs in the subset of the RBs and over a third number of the transmission symbols in the TTI.

Disclosed is a method for transmitting channel state information (CSI) in a wireless access system supporting carrier aggregation / multiple cells and a terminal therefor. Specifically, the method comprises the steps of: if a collision occurs between starting points of periodic CSI reports for first and second cells, calculating the number of resource elements using the biggest bit size among CSI bit sizes for first and second cells; adjusting the bit of the CSI with the highest priority among the CSIs of the first and second cells to match the biggest bit size; transmitting, to the base station, the adjusted bits of the CSI with the highest priority, which have been mapped to the calculated resource element.

A system and method for dynamically changing the quality of service (QoS) for a subscriber of a cellular radio system. Bandwidth-on-Demand (BoD) enables the subscriber to dynamically switch to higher bandwidth and to enable a higher throughput. This may be for a limited time or amount of data, for example. The initiation may be by the subscriber, carrier, sponsor, or automatically by an application. The QoS increase may be dynamically priced in a kind of auction. The wireless device may contact the policy servers of a multiple network operator (MNO), which in turn contacts the Authentication, Authorization and Accounting (AAA) server in the MNO's core network. The policy server contacts the scheduler on the serving basestation which then determines whether to allocate more resources (i.e. bandwidth in the form of subcarriers, resource blocks, resource elements, timeslots) to the subscriber. The initiation may start a timer or data counter.

Systems and methods for the configuration of channel state information reference signals (CSI-RS) are disclosed. The systems and methods include providing user equipment with the locations of CSI-RS reuse information. Several encoding patterns and exemplary methodology for both the identification of the CSI-RS resource element locations are provided in exemplary embodiments. In addition, exemplary embodiments provide muting methods and systems for a physical downlink shared channel resource elements.

The present invention relates to a method and an apparatus for transmitting a reference signal by a base station in a wireless communication system. The base station generates a channel state information (CSI) reference signal (RS) for each of a plurality of layers, performs mapping the plurality of CSI-RSs to a resource element set constituted by a plurality of resource elements(REs) in a subframe and transmits the subframe with the plurality of mapped CSI-RSs. The plurality of resource elements constituting the resource element set are resource elements that are arranged with constant subcarrier spacing in two neighboring orthogonal frequency division multiplexing (OFDM) symbols, and the subframe has an extended cyclic prefix (CP) structure including 12 OFDM symbols.

The invention discloses a transmitting method and device for a downlink control channel. The method comprises the steps of: sending a first signalling to user equipment (UE) by a base station, and informing the UE of whether to remove partial resource elements (REs) in a control domain; and when the first signalling indicates to remove the partial REs in the control domain, mapping the downlink control channel to a physical resource by the base station according to the control domain in which the partial REs are removed, and sending to the UE. According to the invention, the demodulating performance of the UE to the downlink control channel can be increased.

Disclosed herein are a method and apparatus for transmitting uplink data in a wireless communication system. More specifically, a method of transmitting uplink data in a wireless communication system may include mapping, by user equipment (UE), uplink data to a Segmented Physical Resource Block (SPRB), mapping, by the UE, a Demodulation Reference Signal (DMRS) related to the SPRB to a Physical Resource Block (PRB) to which the SPRB belongs, and transmitting, by the UE, the uplink data and the DMRS to a eNB. The SPRB may be defined as a set of resource elements segmented from a pair of the PRBs in a time domain, and the DMRS may be generated using a cyclic shift value predetermined corresponding to the SPRB.

An embodiment of the invention provides a control channel transmission and receiving method, a base station and user equipment, and relates to the field of communication. The control channel transmission and receiving method, the base station and the user equipment can resolve the transmission problem of changeable usable transmission resources led in by an extended-physical downlink control channel (E-PDCCH). A control channel resource configuration method includes the steps that the base station determines resource elements (REs) contained by extended-control channel elements (E-CCEs) according to system configuration and / or user configuration; the E-PDCCH is sent to the user equipment, and the E-PDCCH is borne by the E-CCEs; the user equipment receives the E-PDCCH and obtains the REs contained in the E-CCEs, and the E-PDCCH sent by the base station is received on the REs contained in the E-CCEs. The control channel transmission and receiving method, the base station and the user equipment are used for resource configuration and detection of the control channel.

An apparatus and a method for transmitting / receiving downlink data channel signal transmission information in a cellular radio communication system using a Cooperative Multi-Point (COMP) scheme are provided. In the downlink data channel signal transmission information transmission method, a Base Station (BS) transmits downlink data channel signal transmission information including information related to Resource Elements (REs) scheduled for a downlink data channel signal transmission to a User Equipment (UE), and transmits downlink data channel signal non-transmission information including information related to REs through which a downlink data channel signal is not transmitted among the REs scheduled for the downlink data channel signal transmission to the UE.

A method for mapping a Physical Downlink Control Channel (PDCCH) to resources and an apparatus for transmitting / receiving the mapped PDCCH in a wireless communication system are provided, in which if at least one PDCCH is scheduled to be transmitted in a subframe according to a predetermined scheduling scheme, the PDCCHs are concatenated, interleaved, and mapped to at least one Resource Element (RE).

The invention discloses a measuring method and a base station based on a channel-state information-reference signal (CSI-RS), user equipment (UE) and a CSI-RS resource sharing method of a cell. The measuring method comprises the steps that a first base station sends information of at least one CSI-RS configuration collection to the UE, the first base station receives measuring results, on sub-collections or universal collections of corresponding measuring resources of the CSI-RS configuration collection, of the UE, and the CSI-RS configuration collection comprises at least two kinds of CSI-RS configuration. Through the technical scheme about measurement, the fact the CSI-RS is measured on a plurality of CSI-RS configuration is achieved, the problem that resource elements (RE) of the CSI-RS are sparse is solved, and measuring precision of the UE is improved.