519 results about "Transmission point" patented technology

A wireless communication includes a base station that configures a set of non-zero power reference signals corresponding to multiple potential transmission points to one or more users equipment UEs and configures at least one zero-power reference signal, with zero transmission power from one or more of the multiple transmission points. The base station transmits configuration information to at least one UE of the one more UEs, wherein the configuration information corresponds to a set of resource elements that are associated with a set of channel state information reference signals and wherein the set of channel state information reference signals include the set of nonzero-power reference signals and the at least one zero-power reference signal. The UE then performs a channel measurement based on one or more non-zero-power reference signals of the set of non-zero-power reference signals and performs an interference measurement based on the at least one zero-power reference signal.

Methods for a User Equipment (UE) to transmit Channel Quality Index (CQI) feedback information, and an indicator in feedback information, to an evolved Node B (eNB) in a wireless communication system, and apparatuses therefore, are provided. A method for a UE to transmit CQI feedback information to eNB in a wireless communication system, includes obtaining one or more Transmission Points Configurations for Coordinated MultiPoint (CoMP) (TPCCs), each TPCC including a unique combination of one or more cells in a CoMP measurement set, estimating a channel for one or more cells in the CoMP measurement set, computing a CQI for each of at least one of the one or more TPCCs, each CQI being computed using one or more estimated channels that correspond to the combination of one or more cells included in a corresponding TPCC, generating CQI feedback information based on the one or more CQIs, and transmitting the CQI feedback information.

Methods in a wireless terminal are described for supporting co-ordinated multipoint transmissions including joint transmissions from two or more transmission points, specifically the method of receiving indication of two or more CSI reference signal configurations, each CSI reference signal configuration representing one or more antenna ports comprising a set of antenna ports; determining a first set of transmission parameters corresponding to a first set of antenna ports corresponding to a first CSI reference signal configuration and a second set of transmission parameters corresponding to a second set of antenna ports corresponding to a second CSI reference signal configuration; the first set and second set of transmission parameters determined to maximize the sum data rate for simultaneous transmission from the first set and the second set of antenna ports; conveying, to the base station, information pertaining to the first set of transmission parameters and the second set of transmission parameters.

Methods, systems, and storage media for providing multi-cell, multi-point single user (SU) multiple input and multiple output (MIMO) operations are described. In embodiments, an apparatus may receive and process a first set of one or more independent data streams received in a downlink channel from a first transmission point. The apparatus may receive and process a second set of one or more independent data streams received in a downlink channel from a second transmission point. The apparatus may process control information received from the first transmission point or the second transmission point. The control information may include an indication of a quasi co-location assumption to be used for estimating channel characteristics for reception of the first set of one or more independent data streams or the second set of one or more independent data streams. Other embodiments may be described and/or claimed.

The embodiment of the invention discloses a method and equipment for reporting multi-point channel state information. By adoption of the technical scheme provided by the embodiment of the invention, corresponding report modes can be configured for reference signal resource pairs which respectively consist of channel measurement reference signal resources and interference measurement reference signal resources and are allocated to terminal equipment, or a plurality of channel state information report configurations which comprise the corresponding report modes can be configured for the terminal equipment, a reference signal resource pair which consists of the channel measurement reference signal resources and the interference measurement reference signal resources is allocated to each channel state information report configuration, and the terminal equipment reports the channel state information of the corresponding reference signal resource pairs according to the corresponding report modes, so the terminal equipment can report the channel state information under one or more hypotheses to one or more transmission points.

A method and system is provided that is capable of controlling transmit power to achieve a desired OSNR at a receive endpoint. The system utilizes the fact that the aggregate power for a plurality of channels is controllable between a transmission point and a receive point in the network, and uses this characteristic to coarsely adjust transmission powers in the network to achieve desired OSNR results.

Method of scrambling signals, transmission point device and user equipment using the method are provided. The method is for scrambling signals assigned on predetermined radio resources of at least one layer of resource blocks with the same time and frequency resources, and comprises the steps of: sending an ID table to a user equipment through higher layer signaling, the ID table being a subset of the whole ID space and containing available IDs for the user equipment; notifying the user equipment an ID in the ID table to be used through physical layer signaling or UE specific higher layer signaling; generating a random seed based on the notified ID; initializing a scrambling sequence by the random seed; and scrambling the signals with the initialized scrambling sequence. The method of the disclosure, by combining physical layer signaling and higher layer signaling, may notify the used group ID and the blind detection space to a UE, the blind detection for the UE is enabled and the signaling overhead is reduced.

The invention discloses a pilot frequency transmission method for downlink shared multicast transmission, which is used in a long term evolution advance (LTE-A) system. The system is allocated with a plurality of sets of pilot frequencies for downlink multicast transmission and multiplexing modes thereof; and each transmission point involved in downlink share transmits one of the pilot frequencies in a resource block carrying user data, the same set of pilot frequency occupies the same time and frequency sites in the resource block, and the different sets of pilot frequencies are discriminated via frequency division, time division or code division in the resource block. The inventive method needs not a receiving terminal to discriminate channels corresponding to the transmission points which are involved in the share and only needs to allocate one set or a plurality of sets of logic pilot frequencies for multicast transmission, thereby resulting in low cost of pilot frequencies, simple terminal reception and less downlink control signaling.

A method for uplink synchronization in a distributed antenna system is provided. A user equipment determines a transmission offset based on a transmission point for uplink synchronization, allocates uplink synchronization signal to a second communication channel based on the transmission offset, and transmits the uplink transmission signal to the transmission point for uplink synchronization through the second communication channel.

The invention relates to the field of communication and discloses an indication and confirmation method and device for a time-frequency resource. The method includes the steps that a base station selects a target bandwidth for a terminal, allocates the time-frequency resource to the terminal according to the target bandwidth and carries out time-frequency resource indication in a downlink signal based on the target bandwidth; the terminal analyzes the received downlink signal based on the acquired target bandwidth according to a notice of the base station so as to confirm the time-frequency resource distributed by the base station side. Thus, under the condition that system bandwidths of all transmission points in a cooperation set possibly differ from one another, agreed indication of the time-frequency resource is achieved in CoMP transmission; therefore, UE can receive data effectively based on the acquired time-frequency resource, procedures of system processing in CoMP transmission are improved, and system performance is improved.

Disclosed in the present invention are a non-periodic channel state information (CSI) feedback method and device thereof, the method comprises: a user equipment receives measurement set configuration information from a network side equipment; said user equipment receives non-periodic CSI feedback trigger instruction from the network side equipment; said user equipment performs non-periodic CSI feedback on the measurement set corresponding to the sub-frame which receives said trigger instruction. The embodiments of the present invention enable the measurement and feedback of sub-frame in the sub-frame set, thus solving the problem that different sub-frame sets requires different transmission points while simultaneously utilizing coordinate multipoint transmission/reception (CoMP) and enhanced inter cell interference coordination (eICIC).

An interference measurement method and apparatus for use in a Distributed Antenna System (DAS) is provided. The method for transmitting channel state information based on interference measurement of a terminal in a Distributed Antenna System (DAS) according to the present disclosure includes receiving configuration of Interference Measurement Resource (IMR) for measuring interferences caused by plural Transmission Points (TPs), receiving control information including scheduling information on Physical Downlink Shared Channel (PDSCH), determining whether IMR-based interference measurement and PDSCH reception occur at a same subframe, and transmitting the channel state information generated according to a result of the determination. The interference measurement method and apparatus of the present disclosure is capable of measuring interference for efficient communication in the distributed antenna system.

A method for operating a transmission point with reduced interference includes determining a beamformed signal configuration specified in accordance with configuration information of neighboring TPs, wherein the beamformed signal configuration indicates multiplexed beamformed signals in a spatial domain and at least one of a time domain and a frequency domain, and transmitting beamformed signals in accordance with the beamformed signal configuration, wherein the beamformed signals comprises at least one of beamformed reference signals and beamformed control signals.

A method and an apparatus for transmitting and receiving System Information (SI) of a femto base station in a wireless communication system are provided. In the method, an SI transmission point is determined using unique identification information of a femto base station itself and unique identification information of a macro base station with which the femto base station is associated. Each of user equipment and the macro base station generate a measurement gap pattern representing an SI reception point using the unique identification information of the femto base station and the unique identification information of the macro base station. SI is received from the femto base station according to the generated measurement gap pattern.

Embodiments contemplate methods and systems for determining and communicating channel state information (CSI) for one or more transmission points (or CSI reference signal resources). Embodiments further contemplate determining transmission states may include applying at least one CSI process for channel state information (CSI) reporting. Embodiments also contemplate aperiodic and/or periodic reporting of one or more report types (e.g., rank indicator (RI)) of CSI, perhaps based on one or more reporting modes that may be configured for each of the one or more CSI process.

A method for validating positional data in vehicle surveillance applications wherein vehicles transmit positional data indicating their own position to surrounding vehicles using a data link over which a transmission is initiated at a given transmission point in time that is known by all users of the data link. A signal transmitted from a radio source over the data link is received at a receiving unit. The signal carries positional data indicating an alleged position of a vehicle. The distance between the receiving unit and the radio source is estimated based on the time of flight and the propagation velocity of the received signal. The time of flight is determined based on the time elapsed from the transmission point in time of the signal to the time of reception of at least a first part of the signal. A deviation value is determined. The deviation value indicates the difference between the distance to the position of a vehicle according to the received positional data and the estimated distance to the radio source.

A method for operating a centralized controller in a communications network with a plurality of transmission points includes generating a plurality of overlays for the communications network in accordance with first mutual intercell interference levels for transmission point pairs in the communications network, wherein each overlay of the plurality of overlays comprises virtual transmission points, and selecting a first overlay of the plurality of overlays in accordance with a merit measure derived from first user equipments (UEs) operating in the communications network tentatively scheduled to each overlay of the plurality of overlays. The method also includes scheduling a first subset of the first UEs operating in the communications network during a first resource unit in accordance with the selected first overlay.

A data transmission method and an apparatus in a network supporting coordinated multipoint transmission are provided. The method includes transmitting candidate sets of initial state information used to generate Demodulation Reference Signal (DMRS) scrambling sequences for the transmission points to the UE, and transmitting an indication corresponding to at least one candidate set of initial state information respectively associated with at least one transmission point to the UE, wherein the initial state information is used by the UE to generate DMRS scrambling sequences.

System and method embodiments are provided for transmission and reception scheduling for wireless devices in a multi-user full duplex transmission environment. The embodiments enable interference avoidance between neighboring wireless devices. The system and method also enable channel sounding. In an embodiment, a method for scheduling transmissions in a multi-user wireless system includes determining, by a transmission point, neighboring wireless devices for each of a plurality of wireless devices located within a coverage area of the transmission point and determining, by the transmission point, a transmission schedules for respective ones of the plurality of wireless devices according to the neighboring information of the devices such that each respective wireless device is scheduled to transmit data over different time-frequency resources than those in which neighboring wireless devices of the respective wireless device are scheduled to receive data.

The present invention relates to a wireless communication system, and more specifically to a method and an apparatus for inter-cell interference coordination for a transmission point group. The method for carrying out an interference coordination in a wireless communication system according to one embodiment of the present invention comprises a step for exchanging interference coordination messages between transmission point groups, wherein one transmission group comprises a plurality of transmission points, and the interference coordination message can comprises interference coordination information about each individual transmission point unit within the one transmission point group, and interference coordination information about the overall transmission point unit within the one transmission point group.

The embodiment of the invention discloses a channel state information feedback method, channel state information feedback equipment, a channel state information receiving method and channel state information receiving equipment. By the technical scheme provided by the embodiment of the invention, user equipment feeds channel state information back to network side equipment in a periodic reporting mode supporting coordinated multiple point (CoMP) transmission, wherein a corresponding periodic reporting mode comprises a reporting type used for feeding the rank indication (RI) of a main transmission point back, a reporting type used for feeding a channel quality indicator (CQI) and a precoding matrix indicator (PMI) of the main transmission point back, and/or a reporting type used for feeding the CQI and PMI of a non-main transmission point back, and/or a reporting type used for feeding the CQI and PMI, based on the hypothesis of RI=1, of the main transmission point back. Therefore, various CoMP transmission schemes can be supported.