Improved control channel in high-speed packet access system

FIELD: information technology.

SUBSTANCE: invention relates to behaviour of random access procedure in wireless communication network, a method for conveying information from a node to user equipment, UE, in a high speed packet access (HSPA) system. Method comprises steps of obtaining rank information and modulation information related to a four-branch multiple input multiple output, MIMO, system, combining (S2) rank information and modulation information related to said four-branch MIMO system, into a bit pattern and transmitting combined rank information and modulation information related to said four-branch MIMO system as said bit pattern in a control channel.

EFFECT: providing energy-efficient solution for conveying information associated with four-branch MIMO system, in a control channel from node to UE in a HSPA system.

26 cl, 24 dwg

 



 

Same patents:

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

FIELD: communication systems with distributed transmission, in particular, method and device for non-zero complex weighing and space-time encoding of signals for transmission by multiple antennas.

SUBSTANCE: method and device provide for expansion of space-time block code N×N' to space-time block code M×M', where M>N, with utilization of leap-like alternation of symbols phase in space-time block code N×N', to make it possible to transfer space-time block code from distributed antennas in amount, exceeding N'.

EFFECT: distribution of transmission from more than two antennas.

2 cl, 16 dwg

FIELD: automatic adaptive high frequency packet radio communications.

SUBSTANCE: each high frequency ground station contains at least one additional high frequency receiver for "surface to surface" communication and at least one additional "surface to surface" demodulator of one-tone multi-positional phase-manipulated signal, output of which is connected to additional information input of high frequency controller of ground station, and input is connected to output of additional high frequency "surface to surface" receiver, information input of which is connected to common high frequency receiving antenna, while control input is connected to additional control output of high frequency controller of ground station.

EFFECT: prevented disconnection from "air to surface" data exchange system of technically operable high frequency ground stations which became inaccessible for ground communications sub-system for due to various reasons, and also provision of possible connection to high frequency "air to surface" data exchange system of high frequency ground stations, having no access to ground communication network due to absence of ground communication infrastructure at remote locations, where these high frequency ground stations are positioned.

2 cl, 12 dwg, 2 tbl

FIELD: radio engineering, in particular, signal transfer method (variants) and device for realization thereof (variants), possible use, for example, in cellular radio communication systems during transmission of information signal in direct communication channel from backbone station to mobile station.

SUBSTANCE: technical result is achieved due to correction of spectrum of copies of information signal being transferred, transferring copies of information signal from each adaptive antenna array in each effective transmission direction, estimating transfer functions of direction transmission channels on basis of pilot signals transferred from each antenna element, on basis of pilot signals for distributed transmission, sent from each adaptive antenna array in each one of effective transmission directions, and also combining two given estimates.

EFFECT: increased efficiency of transmission of information signal in direct communication channel, and, therefore, maximized quality of receipt of information signal at mobile station.

5 cl, 10 dwg

FIELD: wireless communication receivers-transmitters and, in particular, wireless communication receivers-transmitters which use a multi-beam antenna system.

SUBSTANCE: when controlling a multi-beam antenna system for a downstream line of wireless communications, generation of polar pattern and signaling of distribution during transmission in closed contour are combined, each beam signal is adjusted at transmitter on basis of check connection from wireless communication mobile station in such a way, that signals received by wireless communication mobile station may be coherently combined.

EFFECT: increased traffic capacity and productivity of the system, improved power consumption, cell coverage and communication line quality characteristics.

2 cl, 5 dwg

FIELD: method for estimating a channel in straight direction in radio communication systems.

SUBSTANCE: in accordance to the method, in straight direction, beam is created by a set of antennas, and at least one vector is created for beam generation, subject to application for connection of at least one base station to at least one mobile station, is defined by at least one client station and from at least one client station to at least one base station information is transmitted, which contains information about aforementioned at least one beam generation vector. In accordance to the invention, at least one base station transmits information about beam generation vector used for connection of at least one base station to at least one client station, to at least one client station, on basis of which at least one client station estimates the channel.

EFFECT: transmission of information about beam generation vector due to selection and transmission of pilot-signal series.

2 cl, 2 dwg

FIELD: physics, communications.

SUBSTANCE: invention concerns data transfer, particularly frequency-time-space block coding in a transmitter with three transmitting Tx antennae. Input symbol sequence is transferred by three Tx antennae according to permutation method via selected transmission matrix.

EFFECT: increased data transfer speed.

28 cl, 10 dwg

FIELD: physics; communications.

SUBSTANCE: present invention pertains to communication techniques. The transmitting object carries out spatial processing using control matrices, so that data transmission is held in a set of "effective" channels, formed on the real channel used for transmitting data, and control matrices, used for PRTS. Control matrices can be formed by sampling a base matrix, which can be a Walsh or Fourier matrix. Different combinations of scalars are then chosen, each combination of which consists of at least one scalar, of at least row of the base matrix. Each scalar can be a real or complex value. Different control matrices are formed by multiplying the base matrix by each of the different combinations of scalars. Control matrices are different transpositions of the base matrix.

EFFECT: generation and use of control matrices for pseudorandom transmission control (PRTS).

55 cl, 3 dwg, 1 tbl

FIELD: physics.

SUBSTANCE: invention is related to device and method for beams shaping in telecommunication system of mobile communication CDMA with application of intellectual antennas technology, using specified device and method, multiple fixed beams are shaped in sector, and multiple fixed beams are used to shape traffic channel with narrow beams and common channel with sector beams in one and the same intellectual antenna system, and problem of phases discrepancy is solved in appropriate channels due to differences in time and temperature oscillations without application of complicated correcting technology. Since fixed beams in some area correlate and interact with each other, or considerably weaken due to correlative summation of space vectors of every fixed beam in process of common channels transfer in CDMA system with multiple antennas, then appropriate ratio is established between power of pilot channel and traffic channel in coverage area, and signal-noise ratio is increased for signals received by mobile communication station. As a result of addition of optical transceivers system between system of the main frequency band and system of radio frequency transceivers (TRX), the main frequency band system services more sectors. Radio frequency unit is located in close proximity to antennas, and consumed power is reduced accordingly.

EFFECT: increased throughput capacity and efficiency of CDMA system with multiple antennas.

15 cl, 6 dwg

FIELD: information technologies.

SUBSTANCE: separation of transmitting antennas with feedback is applied to special channel of downstream communications line, and separation of transmitting antennas without feedback is applied to control channel of downstream communications line in accordance with high-efficiency method of transmission over upstream communications line. The objective of present invention is to determine how the station with separation during transmission which implements advanced upstream communications line (EUL) should apply separation of transmitting antennas to level 1 confirmation information transmission channels (E-HICH), relative transmission rate channels (E-RGCH) and absolute transmission rate channels (E-AGCH).

EFFECT: providing communications system stability and reliability.

9 cl, 15 dwg

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