Uplink transmission apparatus and method for mobile communication system supporting uplink mimo

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to an uplink transmission apparatus and method for a mobile communication system. A base station comprises transmit path circuitry configured to transmit an uplink grant to a subscriber station, the uplink grant indicating a first modulation and coding scheme (MCS) value for a first codeword transmission and a second MCS value for a second codeword transmission; and receive path circuitry configured to receive a multiple-input multiple-output (MIMO) uplink subframe, the MIMO uplink subframe having a first subset of layers used for the first codeword transmission and a second subset of layers used for the second codeword transmission, wherein ACK/NACK information and rank indication (RI) information is repeated on both the first and the second subsets of layers, wherein if the first MCS value is different from the second MCS value, the channel quality information (CQI) is spatially multiplexed onto the subset of layers having a higher MCS value, and wherein if the first MCS value is the same as the second MCS value, the CQI is spatially multiplexed onto the first subset of layers.

EFFECT: transmitting control information uniformly distributed on multiple transmission layers.

20 cl, 12 dwg, 18 tbl

 



 

Same patents:

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to a method and a system for transmitting uplink control information and feedback for carrier aggregation systems. A user equipment device may be configured to transmit uplink control information and other feedback for several downlink component carriers using one or more uplink component carriers. The user equipment device may be configured to transmit such data using a physical uplink control channel rather than a physical uplink shared channel, and to determine the uplink control information and feedback data to be transmitted, the physical uplink control channel resources to be used to transmit the uplink control information and feedback data, and how the uplink control information and feedback data may be transmitted over the physical uplink control channel.

EFFECT: easy access to a communication network.

30 cl, 30 dwg, 24 tbl

FIELD: information technology.

SUBSTANCE: method includes receiving a component carrier, where the component carrier includes a downlink subframe; generating acknowledgement information bits corresponding to the component carrier according to the received component carrier; dividing the acknowledgement information bits into two groups so that each group includes at least one acknowledgement information bit, where the at least one acknowledgement information bit corresponds to physical downlink shared channel (PDSCH) transmission, and/or downlink control information (DCI), where the DCI is used for indicating downlink semi-persistent scheduling (SPS) release; encoding the two divided groups of acknowledgement information bits to obtain two groups of codeword bits, respectively, and generating, from the two groups of codeword bits obtained by the encoding, total codeword bits to be transmitted.

EFFECT: preventing wastage of transmission power and loss of performance of user equipment.

12 cl, 7 dwg, 39 tbl

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to a method of operating a wireless communication terminal. The method includes receiving one or more downlink control messages, each containing scheduling information, which schedules a wireless terminal to receive a downlink transmission on either a primary carrier or a secondary carrier. The method also includes determining, for each of the downlink control messages, whether that message includes scheduling information for the primary carrier or for the secondary carrier. Additionally, the method includes selecting a format for an uplink control message based on whether any of the downlink control messages includes scheduling information for the secondary carrier, generating an uplink control message based on the selected format and transmitting the uplink control message to the base station.

EFFECT: finding an efficient scheme for transmitting information on component carrier scheduling to improve throughput in networks which support carrier aggregation.

38 cl, 15 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication. During channel selection, a control unit (208) selects a resource used in sending a response signal from among specific PUCCH resources notified in advance from a base station (100) and PUCCH resources mapped to a CCE, and controls the transmission of the response signal. A response signal generating unit (212) supports implicit signalling with respect to any given response signal, and at the same time as supporting LTE recovery from 2CC, uses a mapping method which, through bits, levels the amount of PUCCH resources which can determine ACK/NACK simply by determining the PUCCH resource regarding which the response signal was transmitted.

EFFECT: capacity of a terminal device to improve the characteristics of a response signal having poor transmission characteristics when ARQ is used in communication using an uplink unit band and a plurality of downlink unit bands associated with the uplink unit band.

20 cl, 52 dwg

FIELD: physics, computer engineering.

SUBSTANCE: invention relates to methods of managing acknowledgement messages from multiple destinations for multi-user multiple-input multiple-output (MU-MIMO) transmissions. Certain aspects of the present invention relate to an apparatus and methods for managing acknowledgement messages from multiple destinations for MU-MIMO transmissions. According to certain aspects, a polled block acknowledgement (BA) mechanism can be considered mandatory to an acknowledgement protocol, and a sequential (or other type of scheduled/deterministic) mechanism can be considered optional.

EFFECT: higher throughput.

67 cl, 9 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to a terminal and a base station. The terminal comprises: a control information detection section configured to detect downlink allocation information indicating a downlink data resource allocated for each downlink component carrier frequency; a decoding section configured to decode downlink data transmitted in said resource, indicated by the detected downlink allocation information, and a transmission control section configured to transmit a response signal for the decoded downlink data.

EFFECT: maintaining quality of downlink data transmitted in each downlink component frequency band, while reducing downlink allocation control information overhead.

34 cl, 21 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to wireless communication. A plurality of wireless communication devices, each transmitting an acknowledgement of the same wide-band channel transmission transmit their acknowledgements simultaneously over different narrow-band channels that make up the wide-band channel, thereby allowing older devices that cannot decode wide-band channel signals to determine when the acknowledgement is transmitted.

EFFECT: high overall throughput of the communication network.

24 cl, 6 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to wireless communication. Methods of generating beacons include establishing a delay time based at least on a directional beacon transmission characteristic of a wireless communication device. The methods of generating beacons also include determining whether a beacon transmission is received from a remote device during a certain time period, the time period beginning at the start of a beacon interval in a distributed wireless communication network and having the duration of the time delay. When a beacon transmission is not received from a remote device during the time period, one or more directional beacon transmissions can be transmitted upon completion of the time period.

EFFECT: high accuracy during directional beacon transmission.

14 cl, 8 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication and particularly to a radio base station and a mobile station for sending and receiving information indicating a downlink data error detection result. The technical result is achieved due to that an error-detection encoding processing section of a radio base station performs an error-detection encoding process on data which include both first control data necessary for receiving a downlink signal and second control data necessary for sending an uplink signal as a unit. A sending section sends data on which the error-detection encoding process was performed by the error-detection encoding processing section to a mobile station.

EFFECT: designing a radio base station and a mobile station through which the radio base station can receive uplink data properly.

32 dwg

FIELD: radio engineering, communication.

SUBSTANCE: method includes parallel reception of N-bit redundant binary information over two parallel channels in two receiving registers, wherein an information message longer than N bits is broken into N-bit parts which are received successively, and n-bit redundant information where n<N is determined by the used encoding law at a transmitting point of each transmitted information part; after receiving information in two receiving registers, performing parallel decoding on two independent decoders of N-bit codes and simultaneous comparison of said codes, as a result of which the right code is written into the output register from the corresponding receiving register; further, similarly receiving the next N-bit code, wherein for cases of one-time distortion of the received N-bit code, performing an attempt at restoring said code in a restoration code by analysing a mismatch register and requesting retransmission of the current N-bit code and if the code is successfully restored, the code is forwarded from the restoration register to the output register, otherwise the entire receive/transmit system along with communication channels is declared faulty.

EFFECT: higher noise-immunity of receiving information over two parallel communication channels by restoring information with single-bit distortions.

1 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to a wireless communication system comprising a base station and terminal using a generated codebook. The device and method of generating a codebook in a wireless communication system with multiple antenna arrays use said codebook for communication. The method comprises steps of: providing a basic codebook which contains multiple pre-coding matrices; and assigning phase offsets to certain pre-coding matrices in the basic codebook to form a codebook with phase offset. The feedback overhead from a client to a base station side is reduced and a good accuracy of feedback for a multielement antenna array is maintained.

EFFECT: high accuracy of feedback for a multielement antenna array.

20 cl, 1 tbl, 13 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to wireless communication. Described is a method of transmitting or retransmitting data in a multiple input-multiple output (MIMO) wireless communication system using space-time block codes, wherein a mapping table is used, the mapping table mapping a plurality of symbols to antennae and to transmission resources, which can be time intervals or portions of OFDM bandwidth. The mapping table comprises embedded primary segments of Alamouti codes, specifically Alamouti encoding at the symbol level, within secondary segments, which may include Alamouti encoding of primary segments.

EFFECT: improved method for retransmission in MIMO system.

10 cl, 22 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to wireless communication. The reporting order used for reporting multiple channel quality information (CQI) values is chosen to eliminate under-reporting and over-reporting errors arising from the use of differential reporting formats for one or more of the reported CQI values. The selection between single-rank or multi-rank CQI reporting is based on determining which one corresponds to the highest channel capacity, in view of the differential reporting constraints.

EFFECT: increasing communication throughput by controlling the order or method with which CQI values are transmitted in a multi-rank CQI report, which limits one or more such values according to the reporting order.

16 cl, 7 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to a wireless communication system which employs a multiple input multiple output (MIMO) mode. The invention relates to a method of operating a communication system on a network, wherein the system comprises a primary station and at least one secondary station, the primary station comprising a plurality of transmitting antennae and the secondary station comprising a plurality of receiving antennae, wherein the method comprises steps of: selecting, at the primary station, a first communication scheme from a plurality of communication schemes, computing, at the primary station, a transmission vector based on the first communication scheme and computing, at the secondary station, a reception vector based on a second communication scheme, wherein the secondary station selects the second communication scheme from the plurality of communication schemes, based on that the primary station uses the predetermined communication scheme.

EFFECT: improved communication system.

16 cl, 1 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication engineering and can be used in wireless communication systems. The system comprises a plurality of primary stations, each primary station comprising: a transceiver for communicating with a secondary station, said transceiver having two antennae, wherein the method comprises a first one of the plurality of primary stations which transmits to the secondary station for a given spatial channel a first set of reference symbols, and said first one of the plurality of primary stations or second one of said plurality of primary stations transmits to the secondary station for said spatial channel a second set of reference symbols, wherein said at least one second set of reference symbols is orthogonal to said first set of reference symbols, wherein the first and second primary stations receive from the secondary station feedback about the phase difference between the phase of the first set of reference symbols and the phase of the second set of reference symbols received by said at least one secondary station.

EFFECT: high quality of transmitting information.

15 cl, 5 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to network communication, such as mobile communication. The invention particularly discloses a method for communication over a network, which comprises a first cell and a second cell respectively including a first primary station having a first antenna array dedicated to the first cell and a second primary station having a second antenna array dedicated to the second cell, for communicating with a plurality of secondary stations, the method comprising a step of providing cooperative beamforming transmission from the first and second primary stations to at least one first secondary station, the step including: first secondary station signalling at least one channel matrix to at least one of the first and second primary stations, and the first and second primary stations applying a precoding matrix to both the first antenna array and the second antenna array, and wherein the precoding matrix comprises a first vector for the first cell and a second vector for the second cell, the precoding matrix being based on the at least one channel matrix.

EFFECT: providing codebooks which can be used for beamforming.

14 cl, 2 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to communication engineering and can be used in mobile communication systems. The method includes determining a transmission rank for downlink transmission to a user terminal; determining one or more reference signal antenna ports for said downlink transmission based on said transmission rank, wherein each port is defined by an group/code pair comprising a code division multiplexing group and orthogonal security code; mapping reference signal antenna ports to group/code pairs for each transmission rank such that the code division multiplexing group and code orthogonal security code are the same for a given antenna port for every transmission rank; and transmitting downlink check symbols through said reference signal antenna ports according to the transmission rank.

EFFECT: high reliability of transmitting information using antenna port mapping for demodulating reference signals.

16 cl, 1 tbl, 7 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to transmitting and receiving data using multiple frequencies. Measurement of communication quality using a broadband signal and transmission and reception of data using a predetermined frequency band is carried out at approximately the same time. The transmitting device (1) is capable of transmitting data at a first frequency and a second frequency to a receiving device (2). The transmitter (1a) of the transmitting device (1) transmits a predetermined broadband signal in a first period of time in a frequency band which does not include the first frequency, and in a second period of time in a frequency band which does not include the second frequency. The quality measuring unit (2a) of the receiving device (2) measures quality of communication with the transmitting device (1) based on the broadband signal received in the first and second periods of time.

EFFECT: preventing quality degradation when transmitting and receiving data.

21 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to transmitting and receiving data using multiple frequencies. Measurement of communication quality using a broadband signal and transmission and reception of data using a predetermined frequency band are carried out at approximately the same time. The transmitting device (1) is capable of transmitting data at a first frequency and a second frequency to a receiving device (2). The transmitter (1a) of the transmitting device (1) transmits a predetermined broadband signal in a first period of time in a frequency band which does not include the first frequency, and in a second period of time in a frequency band which does not include the second frequency. The quality measuring unit (2a) of the receiving device (2) measures quality of communication with the transmitting device (1) based on the broadband signal received in the first and second periods of time.

EFFECT: preventing quality degradation when transmitting and receiving data.

3 cl, 21 dwg

FIELD: radio engineering, communication.

SUBSTANCE: invention relates to wireless communication and more specifically to sounding feedback transmission in very high throughput (VHT) wireless systems. Sounding feedback may be transmitted from a user station (STA), wherein the feedback may comprise a certain number of beam-forming matrices and a certain number of singular values of a wireless channel associated with the STA. Further, the sounding feedback may comprise a bit for indicating whether said feedback represents a single-user (SU) feedback or a multi-user (MU) feedback.

EFFECT: improved communication.

35 cl, 10 dwg

FIELD: mobile communications.

SUBSTANCE: proposed distributed system of intelligent antennas has N antennas, N radio-frequency transceivers, main frequency band digital signal processor in base station of wireless communication system, feeders, and data bus; N antennas and N radio-frequency transceivers are grouped to obtain a number of radio-frequency transceiver groups disposed at different consistent-reception locations of base station, including different buildings or different floors of one building.

EFFECT: improved consistency of reception.

12 cl, 4 dwg

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