US20120327876A1 - Radio communication system, base station apparatus, mobile station apparatus and radio communication method - Google Patents

Radio communication system, base station apparatus, mobile station apparatus and radio communication method Download PDF

Info

Publication number
US20120327876A1
US20120327876A1 US13/576,962 US201113576962A US2012327876A1 US 20120327876 A1 US20120327876 A1 US 20120327876A1 US 201113576962 A US201113576962 A US 201113576962A US 2012327876 A1 US2012327876 A1 US 2012327876A1
Authority
US
United States
Prior art keywords
station apparatus
mobile station
transmission
base station
reference signal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US13/576,962
Other languages
English (en)
Inventor
Wataru Ouchi
Tatsushi Aiba
Shoichi Suzuki
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sharp Corp
Original Assignee
Sharp Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Sharp Corp filed Critical Sharp Corp
Assigned to SHARP KABUSHIKI KAISHA reassignment SHARP KABUSHIKI KAISHA ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: AIBA, TATSUSHI, OUCHI, WATARU, SUZUKI, SHOICHI
Publication of US20120327876A1 publication Critical patent/US20120327876A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B1/00—Details of transmission systems, not covered by a single one of groups H04B3/00 - H04B13/00; Details of transmission systems not characterised by the medium used for transmission
    • H04B1/69—Spread spectrum techniques
    • H04B1/713—Spread spectrum techniques using frequency hopping
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04J—MULTIPLEX COMMUNICATION
    • H04J11/00—Orthogonal multiplex systems, e.g. using WALSH codes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0091—Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/004—Transmission of channel access control information in the uplink, i.e. towards network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W74/00—Wireless channel access
    • H04W74/002—Transmission of channel access control information
    • H04W74/006—Transmission of channel access control information in the downlink, i.e. towards the terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/20—Manipulation of established connections
    • H04W76/27—Transitions between radio resource control [RRC] states
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H04L5/0012—Hopping in multicarrier systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0014—Three-dimensional division
    • H04L5/0023—Time-frequency-space
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/08—Access point devices

Definitions

  • the present invention relates to a radio communication system including a mobile station apparatus and a base station apparatus, and in particular, to a transmission control method of a reference signal for channel estimation for the mobile station apparatus.
  • LTE-A Long Term Evolution-Advanced
  • A-EUTRA Advanced Evolved Universal Terrestrial Radio Access
  • A-SRS Aperiodic Sounding Reference Signal
  • P-SRS Periodic Sounding Reference Signal
  • Non-patent document 1 “Channel sounding enhancements for LTE-Advanced”, R1-094653, 3GPP TSG-RAN1 Meeting #59, Jeju, Korea, Nov. 9-13, 2009
  • the base station apparatus cannot obtain adequate channel estimate accuracy for an uplink. Further, the mobile station apparatus transmits the reference signal that cannot provide adequate channel estimate accuracy, resulting in that a resource of an uplink signal is wasted, and efficient frequency selective scheduling cannot be performed also in the base station apparatus.
  • the present invention has been made in view of the above-mentioned problems and has an object to provide a radio communication system, a base station apparatus, a mobile station apparatus and a radio communication method that can efficiently transmit the reference signal for channel estimation when the transmission request is notified from the base station apparatus, thereby improving the channel estimate accuracy of the uplink.
  • a radio communication system of an embodiment of the present invention is a radio communication system including a base station apparatus and a mobile station apparatus, wherein the base station apparatus transmits, to the mobile station apparatus, a radio resource control signal (RRC signaling: Radio Resource Control Signaling) including information indicating a number of times of transmission of a reference signal for channel estimation (Repetition number), and transmits, to the mobile station apparatus, a physical downlink control channel including information indicating transmission of the reference signal, and the mobile station apparatus transmits the reference signal to the base station apparatus until a number of times of transmission reaches the number of times of transmission, according to the information indicating the number of times of transmission, which is included in the radio resource control signal, when the information indicating transmission of the reference signal is included in the physical downlink control channel.
  • RRC signaling Radio Resource Control Signaling
  • the base station apparatus can instruct the mobile station apparatus to transmit the A-SRS the predetermined number of times according to one transmission request, improving the uplink channel estimate accuracy.
  • a radio communication system of an embodiment of the present invention is a radio communication system including a base station apparatus and a mobile station apparatus, wherein the base station apparatus transmits, to the mobile station apparatus, a radio resource control signal including information indicating a number of times of transmission of a reference signal for channel estimation, transmits, to the mobile station apparatus, a radio resource control signal including information indicating whether or not to perform frequency hopping of the reference signal, and transmits, to the mobile station apparatus, a physical downlink control channel including information indicating transmission of the reference signal, and the mobile station apparatus transmits, to the base station apparatus, the reference signal while performing frequency hopping until a number of times of transmission reaches the number of times of transmission, according to the information indicating the number of times of transmission and the information indicating frequency hopping, which are included in the radio resource control signals, when the information indicating transmission of the reference signal is included in the physical downlink control channel
  • the base station apparatus achieves efficient frequency selective scheduling, improving the uplink channel estimate accuracy.
  • a radio communication system of an embodiment of the present invention is a radio communication system including a base station apparatus and a mobile station apparatus, wherein the base station apparatus transmits, to the mobile station apparatus, a radio resource control signal including information indicating a number of times of transmission of a reference signal for channel estimation, transmits, to the mobile station apparatus, a radio resource control signal including information indicating whether or not the mobile station apparatus performs antenna selection and transmits, to the mobile station apparatus, a physical downlink control channel including information indicating transmission of the reference signal, and the mobile station apparatus transmits the reference signal to the base station apparatus while performing antenna selection until a number of times of transmission reaches the number of times of transmission, according to the information indicating the number of times of transmission and the information indicating antenna selection, which are included in the radio resource control signals, when the information indicating transmission of the reference signal is included in the physical downlink control channel.
  • the base station apparatus can instruct the mobile station apparatus to perform communication using the antenna having a better communication quality.
  • channel estimation of the plurality of antennas can be performed, switching to MIMO (Multiple Input Multiple Output) communication can be efficiently achieved.
  • a subframe transmitting the reference signal is set for each cell.
  • a subframe transmitting the reference signal is set for each mobile station apparatus.
  • a subframe transmitting the reference signal includes a subframe set for each cell and a subframe set for each mobile station apparatus.
  • the mobile station apparatus can achieve more flexible A-SRS transmission.
  • Abase station apparatus of an embodiment of the present invention is a base station apparatus that communicates with a mobile station apparatus, the base station apparatus including a transmitter for transmitting, to the mobile station apparatus, a radio resource control signal including information indicating a number of times of transmission of a reference signal for channel estimation, and a transmitter for transmitting, to the mobile station apparatus, a physical downlink control channel including information indicating transmission of the reference signal.
  • the base station apparatus of the present invention can instruct the mobile station apparatus to transmit the A-SRS the predetermined number of times with one transmission request.
  • Abase station apparatus of an embodiment of the present invention is a base station apparatus that communicates with a mobile station apparatus, the base station apparatus including a transmitter for transmitting, to the mobile station apparatus, a radio resource control signal including information indicating a number of times of transmission of a reference signal for channel estimation, a transmitter for transmitting, to the mobile station apparatus, a radio resource control signal including information indicating whether or not to perform frequency hopping of the reference signal, and a transmitter for transmitting, to the mobile station apparatus, a physical downlink control channel including information indicating transmission of the reference signal.
  • the base station apparatus of the present invention can instruct the mobile station apparatus to transmit the A-SRS the predetermined number of times while performing frequency hopping with one transmission request.
  • Abase station apparatus of an embodiment of the present invention is a base station apparatus that communicates with a mobile station apparatus, the base station apparatus including a transmitter for transmitting, to the mobile station apparatus, a radio resource control signal including information indicating a number of times of transmission of a reference signal for channel estimation, a transmitter for transmitting, to the mobile station apparatus, a radio resource control signal including information indicating whether or not the mobile station apparatus performs antenna selection, and a transmitter for transmitting; to the mobile station apparatus; a physical downlink control channel including information indicating transmission of the reference signal.
  • the base station apparatus of the present invention can instruct the mobile station apparatus to transmit the A-SRS the predetermined number of times while performing antenna selection (switching) with one transmission request.
  • a mobile station apparatus of an embodiment of the present invention is a mobile station apparatus that communicates with a base station apparatus, the mobile station apparatus including a transmitter for transmitting, to the base station apparatus, a reference signal until a number of times of transmission reaches the number of times of transmission, according to information indicating a number of times of transmission, which is included in a radio resource control signal, when the information indicating transmission of the reference signal is included in a physical downlink control channel.
  • the mobile station apparatus of the present invention can transmit the A-SRS the predetermined number of times with one transmission request from the base station apparatus.
  • a mobile station apparatus of an embodiment of the present invention is a mobile station apparatus that communicates with a base station apparatus, the mobile station apparatus including a transmitter for transmitting, to the base station apparatus, a reference signal while performing frequency hopping until a number of times of transmission reaches the number of times of transmission, according to information indicating the number of times of transmission and information indicating frequency hopping, which are included in a radio resource control signal, when the information indicating transmission of the reference signal is included in a physical downlink control channel.
  • the mobile station apparatus of the present invention can transmit the A-SRS the predetermined number of times while performing frequency hopping with one transmission request.
  • a mobile station apparatus of an embodiment of the present invention is a mobile station apparatus that communicates with a base station apparatus, the mobile station apparatus including a transmitter for transmitting, to the base station apparatus, a reference signal while performing antenna selection until a number of times of transmission reaches the number of times of transmission, according to information indicating the number of times of transmission and information indicating antenna selection, which are included in the radio resource control signals, when information indicating transmission of the reference signal is included in a physical downlink control channel.
  • the mobile station apparatus of the present invention can transmit the A-SRS the predetermined number of times while performing antenna selection (switching) with one transmission request.
  • a radio communication method of an embodiment of the present invention is a radio communication method of a radio communication system including a base station apparatus and a mobile station apparatus, the method at least including the steps of: in the base station apparatus, transmitting, to the mobile station apparatus, a radio resource control signal including information indicating a number of times of transmission of a reference signal for channel estimation; and transmitting, to the mobile station apparatus, a physical downlink control channel including information indicating transmission of the reference signal, and in the mobile station apparatus, transmitting, to the base station apparatus, the reference signal until a number of times of transmission reaches the number of times of transmission, according to the information indicating the number of times of transmission, which is included in the radio resource control signal, when the information indicating transmission of the reference signal is included in the physical downlink control channel.
  • the mobile station apparatus can transmit the A-SRS the predetermined number of times with one transmission request from the base station apparatus.
  • a radio communication method of an embodiment of the present invention is a radio communication method of a radio communication system including a base station apparatus and a mobile station apparatus, the method at least including the steps of: in the base station apparatus, transmitting, to the mobile station apparatus, a radio resource control signal including information indicating a number of times of transmission of a reference signal for channel estimation, transmitting, to the mobile station apparatus, a radio resource control signal including information indicating whether or not to perform frequency hopping of the reference signal, and transmitting, to the mobile station apparatus, a physical downlink control channel including information indicating transmission of the reference signal, and in the mobile station apparatus, transmitting, to the base station apparatus, the reference signal while performing frequency hopping until a number of times of transmission reaches the number of times of transmission, according to the information indicating the number of times of transmission and the information indicating the frequency hopping, which are included in the radio resource control signals, when the information indicating transmission of the reference signal is included in the physical downlink control channel.
  • the mobile station apparatus can transmit the A-SRS the predetermined number of times while performing frequency hopping with one transmission request from the base station apparatus.
  • a radio communication method of an embodiment of the present invention is a radio communication method of a radio communication system including a base station apparatus and a mobile station apparatus, the method at least including the steps of: in the base station apparatus, transmitting, to the mobile station apparatus, a radio resource control signal including information indicating a number of times of transmission of a reference signal for channel estimation, transmitting, to the mobile station apparatus, a radio resource control signal including information indicating whether or not the mobile station apparatus performs antenna selection, and transmitting, to the mobile station apparatus, a physical downlink control channel including information indicating transmission of the reference signal, and in the mobile station apparatus, transmitting, to the base station apparatus, the reference signal while performing antenna selection until a number of times of transmission reaches the number of times of transmission, according to the information indicating the number of times of transmission and the information indicating antenna selection, which are included in the radio resource control signal, when the information indicating transmission of the reference signal is included in the physical downlink control channel.
  • the mobile station apparatus can transmit the A-SRS while performing antenna selection (switching) the predetermined number of times with one transmission request from the base station apparatus.
  • the mobile station apparatus it is possible to provide the mobile station apparatus, the base station apparatus, the radio communication system and the radio communication method that can efficiently transmit the reference signal for channel estimation when the transmission request is notified from the base station apparatus, thereby improving the channel estimate accuracy of the uplink.
  • FIG. 1 is a block diagram schematically showing a functional structure of a base station apparatus 1 of the present invention.
  • FIG. 2 is a block diagram schematically showing a functional structure of a mobile station apparatus 3 of the present invention.
  • FIG. 3 is a view showing one example of signaling for A-SRS transmission in accordance with First embodiment of the present invention.
  • FIG. 4 is a view showing one example of signaling for A-SRS transmission in accordance with Second embodiment of the present invention.
  • FIG. 5 is a view showing one example of signaling for A-SRS transmission in accordance with Third embodiment of the present invention.
  • FIG. 6 is a view schematically showing a configuration of SRS resource allocation and frequency hopping (FH) according to the present invention.
  • Physical channels used in the present invention include a physical broadcast channel, physical downlink shared channel, a physical downlink control channel, a downlink reference signal, a physical uplink shared channel, a physical uplink control channel, a physical random access channel and an uplink reference signal. Even when a different type of physical channel is added to the above-mentioned physical channel, each of below-mentioned embodiments of the present invention can be applied.
  • the physical broadcast channel is transmitted to provide notification of a control parameter (broadcast information) commonly used by the mobile station apparatus in a cell.
  • a cell global ID indicating a cell-specific ID (Identity) is notified.
  • a broadcast channel (BCH) is mapped at intervals of 40 milliseconds. The timing of 40 milliseconds is blind-detected in the mobile station apparatus. That is, due to the timing presentation of the physical broadcast channel, an explicit signaling is not transmitted to the mobile station apparatus.
  • a subframe including the physical broadcast channel (PBCH) is self-decodable.
  • the physical downlink control channel is a downlink channel transmitted from the base station apparatus to the mobile station apparatus, which is a channel used to notify the mobile station apparatus of resource allocation of the physical downlink shared channel (PDSCH), hybrid automatic repeat request (HARQ) information for downlink data (DL-SCH: Downlink-Shared Channel) and uplink transmission grant (uplink grant) as resource allocation of the physical uplink shared channel (PUSCH).
  • PDSCH physical downlink shared channel
  • HARQ hybrid automatic repeat request
  • uplink grant uplink transmission grant
  • the physical downlink shared channel is a channel used to transmit downlink data (DL-SCH: Downlink-Shared Channel) or paging information.
  • DL-SCH Downlink-Shared Channel
  • the downlink reference signal (DL-RS: Downlink Reference Signal or Cell-specific Reference Signal) is transmitted using a downlink from the base station apparatus to the mobile station apparatus.
  • the mobile station apparatus measures the downlink reference signal to determine the reception quality of the downlink.
  • the reception quality is notified to the base station apparatus by use of the physical uplink control channel (PUCCH) or the physical uplink shared channel (PUSCH) as CQI (Channel Quality Indicator), which is quality information indicator.
  • PUCCH physical uplink control channel
  • PUSCH Physical uplink shared channel
  • CQI Channel Quality Indicator
  • reception quality examples include SIR (Signal-to-Interference Ratio), SINR (Signal-to-Interference plus Noise Ratio), SNR (Signal-to-Noise Ratio), CIR (Carrier-to-Interference Ratio), BLER (Block Error Rate) and path loss.
  • SIR Signal-to-Interference Ratio
  • SINR Signal-to-Interference plus Noise Ratio
  • SNR Signal-to-Noise Ratio
  • CIR Carrier-to-Interference Ratio
  • BLER Block Error Rate
  • the physical uplink shared channel is a channel used to transmit mainly uplink data (UL-SCH: Uplink Shared Channel).
  • UL-SCH Uplink Shared Channel
  • channel status information downlink channel quality indicator (CQI)
  • PMI precoding matrix indicator
  • RI rank indicator
  • ACK acknowledgement response
  • NACK Negative Acknowledgement
  • HARQ hybrid automatic repeat request
  • the uplink data indicates, for example, transmission of user data
  • the UL-SCH is a transport channel.
  • the HARQ and dynamic adaptive radio link control is supported, and beam forming is available.
  • dynamic resource allocation and quasi-static resource allocation are supported.
  • the physical uplink control channel is a channel used to transmit control data.
  • control data include channel status information (CQI, PMI, RI) transmitted (fed back) from the mobile station apparatus to the base station apparatus, scheduling request (SR) to request resource allocation for transmission of the uplink data by the mobile station apparatus (to request transmission in the UL-SCH) and ACK/NACK to the HARQ for the downlink transmission.
  • CQI, PMI, RI channel status information
  • SR scheduling request
  • ACK/NACK ACK/NACK to the HARQ for the downlink transmission.
  • the uplink reference signal (UL-RS) is transmitted from the mobile station apparatus to the base station apparatus.
  • the UL-RS is classified into a sounding reference signal (SRS) and a demodulation reference signal (DM-RS).
  • the sounding reference signal as a reference signal for channel estimation is measured by the base station apparatus to determine the reception quality of an uplink radio transmission signal of the mobile station apparatus, and is used to adjust uplink scheduling and uplink timing synchronization on the basis of the reception quality.
  • the demodulation reference signal is transmitted together with the physical uplink shared channel, and is used as the reference signal for calculating amplitude, phase and frequency change of a signal of the physical uplink shared channel and demodulating the signal transmitted by use of the physical uplink shared channel.
  • a transmission frequency band of the DM-RS matches a transmission frequency band of the PUSCH, while a transmission frequency band of the SRS is set independently of the transmission frequency band of the DM-RS. That is, the transmission frequency band of the SRS does not necessarily match the transmission frequency band of the PUSCH and is previously set by the base station apparatus.
  • Frequency hopping is applied to the SRS in a time axis direction. By using the frequency hopping, the SRS can obtain a frequency diversity effect and an interference averaging effect.
  • a first reference signal (A-SRS: Aperiodic SRS) for channel estimation is a reference signal for channel estimation transmitted upon request from the base station apparatus, and a subframe transmitting the first reference signal may be set by use of the physical downlink control channel by the base station apparatus, or may be set by use of a radio resource control signal (RRC signaling).
  • RRC signaling radio resource control signal
  • a second reference signal (P-SRS: Periodic SRS) for channel estimation is a reference signal for channel estimation transmitted according to a transmission periodicity previously set by the base station apparatus, a subframe transmitting the second reference signal may be set by use of the radio resource control signal by the base station apparatus, or may be set by use of the broadcast channel.
  • Configuration information on SRS parameters such as the transmission periodicity and the transmission frequency band of each of the first reference signal and the second reference signal may be previously set by the base station apparatus and then, the radio resource control signal including the configuration information may be transmitted to the mobile station apparatus.
  • the subframe transmitting the reference signal for channel estimation may be set for each cell, set for each mobile station apparatus or set for each component carrier, or the subframe transmitting the first reference signal and the subframe transmitting the second reference signal may be the same as each other or different from each other.
  • the base station apparatus may set the subframe transmitting the first reference signal for each mobile station apparatus, and set the subframe transmitting the second reference signal for each cell.
  • the physical random access channel is a physical channel used to transmit a random access preamble, and has guard time.
  • the PRACH has a main object to allow the mobile station apparatus to synchronize with the base station apparatus, and is also used for initial access, handover, reconnection request and scheduling request.
  • the scheduling request is information that the mobile station apparatus requests resource allocation of the physical uplink shared channel to the base station apparatus.
  • the mobile station apparatus When the mobile station apparatus accumulates information data to be transmitted in its buffer and requests resource allocation of the physical uplink shared channel, the mobile station apparatus transmits the scheduling request. Using the physical uplink control channel previously allocated by the base station apparatus, the mobile station apparatus also transmits the scheduling request to the base station apparatus.
  • the base station apparatus allocates a periodic resource for arrangement of the scheduling request by the mobile station apparatus.
  • FIG. 6 is a view schematically showing a configuration of SRS resource allocation and frequency hopping (FH).
  • a horizontal axis represents time and a vertical axis represents frequency.
  • a left side shows one example of SRS resource allocation.
  • 14 symbols are aligned in the time axis direction. Seven symbols correspond to 1 slot, and a length of 1 slot is 0.5 milliseconds (ms).
  • the 14 symbols correspond to 2 slots
  • correspond to 1 subframe correspond to 1 subframe, and a length of 1 subframe is 1 millisecond.
  • the SRS is allocated to the 14 th symbol.
  • the resource (bandwidth in the frequency direction) of the SRS allocated to the 14 th symbol is set according to an uplink system bandwidth and transmit power of the mobile station apparatus.
  • the PRACH can change bandwidth and time symbol length according to the type and format of a message to be transmitted and allocate them.
  • the frequency hopping changing frequency position at each transmission is applied in the time axis direction.
  • a right side in this figure shows one example of SRS frequency hopping.
  • the SRS is transmitted every transmission periodicity T, and as shown in the figure, hopping is performed in the frequency direction every periodicity T (that is, in each transmission).
  • a base station apparatus 1 transmits the radio resource control signal including information indicating the number of times of transmission of a reference signal for channel estimation to a mobile station apparatus 3 , and transmits a physical downlink control channel including information indicating transmission of the reference signal to the mobile station apparatus 3 .
  • the mobile station apparatus 3 sets the number of times of transmission of the reference signal according to the information indicating the number of times of transmission, which is included in the radio resource control signal, and when the information indicating transmission of the reference signal is included in the physical downlink control channel, the mobile station apparatus 3 transmits the reference signal to the base station apparatus 1 .
  • the mobile station apparatus 3 can transmit the A-SRS the predetermined number of times.
  • FIG. 1 is a block diagram schematically showing a functional structure of the base station apparatus 1 according to the present invention.
  • the base station apparatus 1 includes a transmitting part 101 , a receiving part 103 , a scheduling part 105 , a higher layer 107 and an antenna 109 .
  • the transmitting part 101 includes a data control part 1011 , a modulating part 1013 and a radio transmitting part 1015 .
  • the receiving part 103 includes a radio receiving part 1031 , a demodulating part 1033 and a data extracting part 1035 .
  • the data control part 1011 receives inputs of user data and control data, and according to an instruction from the scheduling part 105 , arranges the control data in the PDCCH and arranges transmit data to each mobile station apparatus 3 and the control data in the PDSCH.
  • the modulating part 1013 executes signal processing such as data modulation, serial/parallel conversion of an input signal, IFFT, CP insertion and filtering, and generates a transmission signal.
  • the radio transmitting part 1015 upconverts modulated data to a radio frequency and then, transmits it to the mobile station apparatus 3 via the antenna 109 .
  • the radio receiving part 1031 receives an uplink signal from the mobile station apparatus 3 , down converts it to a baseband signal and outputs received data to the demodulating part 1033 .
  • the data extracting part 1035 confirms whether or not the received data is correct, and notifies a confirmation result to the scheduling part 105 .
  • the data extracting part 1035 divides the received data into the user data and the control data.
  • the data extracting part 1035 outputs control data of the second layer in the control data, such as downlink channel quality instruction information and acknowledgment/negative acknowledgment (ACK/NACK) of downlink data, to the scheduling part 105 , and outputs the control data of the third layer and the user data to the higher layer 107 .
  • the data extracting part 1035 stores the received data for synthesis with retransmission data, and when receiving the retransmission data, executes synthesis processing.
  • the scheduling part 105 performs scheduling for arranging the user data and the control data in the PDSCH and the PDCCH.
  • the higher layer 107 executes processing of a medium access control (MAC) layer, a radio link control (RLC) layer, a packet data convergence protocol (PDCP) layer and a radio resource control (RRC) layer.
  • MAC medium access control
  • RLC radio link control
  • PDCP packet data convergence protocol
  • RRC radio resource control
  • the higher layer 107 also uses a radio resource control part 1071 (also referred to as a control part).
  • the radio resource control part 1071 performs management of various configuration information, management of system information, paging control, management of a communication status of each mobile station apparatus 3 , mobility management such as handover, management of a buffer status of each mobile station apparatus 3 , management of connection configuration of unicast and multicast bearers and management of a mobile station identifier (UEID).
  • the higher layer 107 exchanges information with another base station apparatus 1 and an upper node.
  • FIG. 2 is a block diagram schematically showing a functional structure of the mobile station apparatus 3 according to the present invention.
  • the mobile station apparatus 3 includes a transmitting part 201 , a receiving part 203 , a scheduling part 205 , a higher layer 207 and an antenna 209 .
  • the transmitting part 201 includes a data control part 2011 , a modulating part 2013 and a radio transmitting part 2015 .
  • the receiving part 203 includes a radio receiving part 2031 , a demodulating part 2033 and a data extracting part 2035 .
  • the user data and the control data are input from the higher layer 207 to the data control part 2011 .
  • the data control part 2011 arranges input data in the PUSCH and the PUCCH.
  • the modulating part 2013 modulates the data in the PUSCH and the PUCCH and outputs modulated data to the radio transmitting part 2015 .
  • the radio transmitting part 2015 applies signal processing, such as discrete Fourier transform (DFT), subcarrier mapping, inverse fast Fourier transform (IFFT), CP (Cyclic Prefix) insertion and filtering, to the modulated data and an uplink reference signal to generate a transmission signal, upconverts it to radio frequency and then, transmits it to the base station apparatus 1 via the antenna 209 .
  • DFT discrete Fourier transform
  • IFFT inverse fast Fourier transform
  • CP Cyclic Prefix
  • the radio receiving part 2031 receives a downlink signal from the base station apparatus 1 , downconverts the signal to a baseband signal and outputs the received signal to the demodulating part 2033 .
  • the demodulating part 2033 demodulates received data.
  • the data extracting part 2035 divides the received data into the user data and the control data.
  • the data extracting part 2035 outputs the control data about scheduling information, random access response message and intermittent reception control, and other control data of the second layer to the control data scheduling part 205 , and outputs the user data to the higher layer 207 .
  • the scheduling part 205 analyzes the control data input from the data extracting part 2035 and generates uplink scheduling information, and based on the scheduling information, instructs the data control part 2011 to allocate the user data and the control data to the PUSCH and the PUCCH.
  • the scheduling part 205 further includes a reference signal control part 2051 .
  • the reference signal control part 2051 extracts SRS configuration information on the basis of the scheduling information transmitted from the base station apparatus 1 .
  • Various parameters of the first reference signal (A-SRS) and the second reference signal (P-SRS) are set based on the SRS configuration information. Transmission control in the case where the first reference signal and the second reference signal for channel estimation, and the physical uplink control channel occur in the same timing is performed to generate SRS transmission control information.
  • the reference signal control part 2051 outputs the SRS configuration information and the SRS transmission control information to a reference signal generating part 206 .
  • the reference signal generating part 206 Based on the SRS configuration information and the SRS transmission control information, which are input from the reference signal control part 2051 , the reference signal generating part 206 generates the first reference signal and/or the second reference signal and outputs the generated signal to the radio transmitting part 2015 .
  • the higher layer 207 executes processing of the medium access control (MAC) layer, the radio link control (RLC) layer, the packet data convergence protocol (PDCP) layer and the radio resource control (RRC) layer.
  • An interface (not shown) between the higher layer 207 , and the scheduling part 205 , the antenna 209 , the transmitting part 201 , the receiving part 203 exists such that the higher layer 207 controls the processing parts of the lower layer together.
  • the higher layer 207 has a radio resource control part 2071 (hereinafter referred to as a control part).
  • the radio resource control part 2071 performs management of various configuration information, management of system information, paging control, management of a communication status of a local station, mobility management such as handover, management of a buffer status, management of connection configuration of unicast and multicast bearers and management of a mobile station identifier (UEID).
  • UEID mobile station identifier
  • FIG. 3 is a view showing one example of signaling for A-SRS transmission in accordance with First embodiment of the present invention.
  • the base station apparatus 1 transmits the radio resource control signal including the A-SRS configuration information to the mobile station apparatus 3 (Step S 101 ).
  • the base station apparatus 1 transmits the radio resource control signal including information indicating the number of times of A-SRS transmission (for example, the number of times of transmission is five) to the mobile station apparatus 3 (Step S 102 ).
  • the mobile station apparatus 3 sets various parameters of the A-SRS (including the number of times of transmission).
  • Step S 103 When the PDCCH including information indicating A-SRS transmission from the base station apparatus 1 is transmitted to the mobile station apparatus 3 (Step S 103 ), the mobile station apparatus 3 transmits the A-SRS to the base station apparatus 1 until the number of times of transmission reaches the predetermined number of times (Step S 104 ).
  • the PDCCH includes a TPC (Transmit Power Control) command for A-SRS transmission. That is, according to the TPC command included in the PDCCH, the mobile station apparatus 3 transmits the A-SRS to the base station apparatus 1 .
  • the information indicating the number of times of A-SRS transmission may be included in the A-SRS configuration information.
  • the parameters set by the SRS configuration information are the transmission frequency band and the transmission periodicity for A-SRS transmission and the transmission frequency band and the transmission periodicity for P-SRS transmission.
  • the mobile station apparatus 3 may simultaneously transmit the A-SRS via the plurality of antennas.
  • the mobile station apparatus 3 may ignore the information included in the new received PDCCH and transmit the A-SRS until the number of times of transmission of the reference signal reaches the predetermined number of times, or may stop transmission of A-SRS being transmitted, resets the number of times the mobile station apparatus 3 transmits the A-SRS, and transmit the new A-SRS requested from the base station apparatus 1 to the base station apparatus 1 until the number of times of transmission reaches the predetermined number of times.
  • the mobile station apparatus 3 drops (does not transmit) the P-SRS and transmits the A-SRS to the base station apparatus 1 .
  • that the A-SRS and the P-SRS are allocated in the same timing means that, describing with reference to the left side in FIG. 6 , one mobile station apparatus 3 simultaneously arranges and transmits the A-SRS and the P-SRS to the 14 th symbol (shadow area) to which the A-SRS and the P-SRS are transmitted according to an instruction of the base station apparatus 1 , and the transmission timing matches in units of symbol.
  • the mobile station apparatus 3 can determine whether or not the A-SRS and the P-SRS are allocated in the 14 th symbol in the same timing.
  • the base station apparatus 1 may set the subframe transmitting the A-SRS for each cell or for each mobile station apparatus 3 .
  • the subframe transmitting the A-SRS may include the subframe set for each cell and the subframe set for each mobile station apparatus 3 .
  • the base station apparatus 1 may set the subframe transmitting the A-SRS for each component carrier.
  • the base station apparatus 1 may set the subframe transmitting the A-SRS for each antenna.
  • the mobile station apparatus 3 transmits the A-SRS by using the same uplink component carrier as the uplink component carrier transmitting the PUSCH. That is, when receiving the radio resource control signal including the A-SRS configuration information and the number of times of A-SRS transmission from the base station apparatus 1 , the mobile station apparatus 3 transmits the A-SRS by using the same uplink component carrier as the uplink component carrier transmitting the PUSCH until the number of times of transmission reaches the predetermined number of times of transmission.
  • parameters for the A-SRS transmission are parameters set for the same uplink component carrier as the uplink component carrier transmitting the PUSCH.
  • the TPC command included in the PDCCH is applied to PUSCH transmission and A-SRS transmission of the uplink component carrier indicated by the PDCCH.
  • the component carrier may be allocated in the contiguous frequency bands or non-contiguous frequency bands, and the base station apparatus 1 and the mobile station apparatus 3 can aggregate a plurality of component carriers as the contiguous and/or non-contiguous frequency bands to configure a wide system band (frequency band), and use the plurality component carriers in a composite manner, realizing high-speed data communication (information transmission/reception).
  • the downlink frequency band and the uplink frequency band which are each configured of the component carrier, do not necessarily have the same bandwidth, and the base station apparatus 1 and the mobile station apparatus 3 can perform communication by using the downlink frequency band and the uplink frequency band that are composed of the component carriers and have different bandwidths (asymmetric frequency band aggregation: asymmetric carrier aggregation).
  • the mobile station apparatus 3 when the information indicating A-SRS transmission is included in the PDCCH, the mobile station apparatus 3 can transmit the A-SRS the predetermined number of times.
  • the predetermined number of times means the number of times of A-SRS transmission, which is previously set by the base station apparatus 1 .
  • the uplink channel estimate accuracy can be improved by transmitting the A-SRS with the predetermined number of times. Further, since the A-SRS can be transmitted plural times with one notification, signaling for the A-SRS transmission request can be reduced, realizing efficient A-SRS transmission.
  • the base station apparatus 1 transmits the radio resource control signal including information indicating the number of times of A-SRS transmission to the mobile station apparatus 3 , transmits the radio resource control signal including information indicating whether or not to perform frequency hopping of the A-SRS to the mobile station apparatus 3 , and transmits the physical downlink control channel including information indicating A-SRS transmission to the mobile station apparatus 3 .
  • the mobile station apparatus 3 sets the number of times of A-SRS transmission according to the information indicating the number of times of A-SRS transmission, which is included in the radio resource control signal, sets whether or not to perform frequency hopping according to the information indicating whether or not to perform frequency hopping of the A-SRS, which is included in the radio resource control signal, and transmits the A-SRS to the base station apparatus 1 when the information indicating A-SRS transmission is included in the physical downlink control channel.
  • the channel estimate accuracy can be improved by transmitting the A-SRS plural times while performing frequency hopping.
  • Use of frequency hopping can decrease the transmission frequency band of the SRS transmitted at one time.
  • transmit power per subcarrier can be increased and the frequency diversity effect and the interference averaging effect of frequency hopping can be obtained, the channel estimate accuracy can be improved.
  • FIG. 4 is a view showing one example of signaling for A-SRS transmission in accordance with Second embodiment of the present invention.
  • the base station apparatus 1 transmits the radio resource control signal including the A-SRS configuration information to the mobile station apparatus 3 (Step S 201 ).
  • the base station apparatus 1 transmits the radio resource control signal including the information indicating the number of times of A-SRS transmission (for example, the number of times of transmission is 5) to the mobile station apparatus 3 (Step S 202 ).
  • the base station apparatus 1 transmits the radio resource control signal including information indicating whether or not frequency hopping is possible to the mobile station apparatus 3 (Step S 203 ).
  • the mobile station apparatus 3 sets various parameters of the A-SRS (including the number of times of transmission and whether or not frequency hopping is possible). Further, when the base station apparatus 1 transmits the PDCCH including the information indicating A-SRS transmission to the mobile station apparatus 3 (Step S 204 ), the mobile station apparatus 3 transmits the A-SRS to the base station apparatus 1 until the number of times of transmission of the reference signal reaches the predetermined number of times of transmission (Step S 205 ).
  • the mobile station apparatus 3 transmits the A-SRS to the base station apparatus 1 while performing frequency hopping of the A-SRS until the number of times of transmission reaches the predetermined number of times.
  • that frequency hopping of the A-SRS is possible means that the base station apparatus 1 sets the transmission frequency band of the A-SRS to be smaller than the bandwidth for frequency hopping, and the mobile station apparatus 3 compare the transmission frequency band of the A-SRS with the bandwidth for frequency hopping to determine whether or not frequency hopping is performed.
  • the information indicating the number of times of A-SRS transmission and the information indicating whether or not frequency hopping is possible may be included in the A-SRS configuration information.
  • the parameters set by the SRS configuration information are the transmission frequency band and the transmission periodicity for A-SRS transmission and the transmission frequency band and the transmission periodicity for P-SRS transmission.
  • a frequency domain (resource domain) in which the A-SRS can be allocated is divided into f1 and f2
  • the mobile station apparatus 3 transmits the A-SRS to the base station apparatus 1 while switching the frequency domain in which the A-SRS is allocated between f1 and f2.
  • the A-SRS in the case where the information indicating A-SRS transmission is indicated in the PDCCH, the A-SRS can be transmitted the predetermined number of times while performing frequency hopping.
  • the mobile station apparatus 3 can set frequency hopping with only one SRS transmission request and thus, can achieve efficient SRS transmission and frequency hopping. Due to the effect of frequency hopping, the base station apparatus 1 can improve the channel estimate accuracy and perform efficient frequency selection scheduling.
  • the base station apparatus 1 transmits the radio resource control signal including the information indicating the number of times of A-SRS transmission to the mobile station apparatus 3 , transmits the radio resource control signal including information indicating whether or not antenna selection is made to the mobile station apparatus 3 , and transmits the physical downlink control channel including the information indicating A-SRS transmission to the mobile station apparatus 3 .
  • the mobile station apparatus 3 sets the number of times of A-SRS transmission according to the information indicating the number of times of A-SRS transmission, which is included in the radio resource control signal, sets whether or not antenna selection is made according to the information indicating whether or not antenna selection is made, which is included in the radio resource control signal, and transmits the A-SRS to the base station apparatus 1 when the information indicating A-SRS transmission is included in the physical downlink control channel.
  • antenna selection means that, in the case where a plurality of transmitting antennas are set for the mobile station apparatus 3 , the base station apparatus 1 can previously designate the antenna transmitting the uplink signal to the mobile station apparatus 3 or instruct switching of the transmitting antenna and transmission.
  • FIG. 5 is a view showing one example of signaling for A-SRS transmission in accordance with Third embodiment of the present invention.
  • the base station apparatus 1 transmits the radio resource control signal including the A-SRS configuration information to the mobile station apparatus 3 (Step S 301 ).
  • the base station apparatus 1 transmits the radio resource control signal including information indicating the number of times of A-SRS transmission (for example, the number of times of transmission is 5) to the mobile station apparatus 3 (Step S 302 ).
  • the base station apparatus 1 transmits the radio resource control signal including the information indicating whether or not antenna selection is possible to the mobile station apparatus 3 (Step S 303 ).
  • the mobile station apparatus 3 sets various parameters of the A-SRS (including the number of times of transmission and whether or not antenna selection is possible).
  • the base station apparatus 1 transmits the PDCCH including the information indicating A-SRS transmission to the mobile station apparatus 3 (Step S 304 )
  • the mobile station apparatus 3 transmits the A-SRS to the base station apparatus 1 until the number of times of transmission reaches the predetermined number of times (Step S 305 ).
  • the mobile station apparatus 3 transmits the A-SRS to the base station apparatus 1 while performing antenna selection until the number of times of transmission of the reference signal reaches the predetermined number of times.
  • the information indicating the number of times of A-SRS transmission and the information indicating whether or not antenna selection is possible may be included in the A-SRS configuration information.
  • the parameters set by the SRS configuration information are the transmission frequency band and the transmission periodicity.
  • the mobile station apparatus 3 transmits the A-SRS to the base station apparatus 1 while switching between ant#1 and ant#2.
  • the mobile station apparatus 3 in the case where the information indicating A-SRS transmission is indicated in the PDCCH, the mobile station apparatus 3 can transmit the A-SRS the predetermined number of times while selecting (switching) the antenna.
  • the mobile station apparatus 3 can transmit the A-SRS via the plurality of antennas through antenna selection, and the base station apparatus 1 can use the received A-SRS to estimate channel for each antenna, efficient channel estimation using the plurality of antennas can be achieved. Further, the base station apparatus 1 can select the transmitting antenna having a better communication status with the mobile station apparatus 3 , or can switch communication to MIMO (Multiple Input Multiple Output) communication requiring transmission using a plurality of antennas.
  • MIMO Multiple Input Multiple Output
  • some of functions of the base station apparatus 1 and the mobile station apparatus 3 in the above-mentioned embodiments may be implemented by a computer. This may be achieved by recording a program for implementing the control functions in a computer-readable recording medium, reading the program recorded in the recording medium and executing the program.
  • the “computer system” includes OS and hardware such as peripheral devices.
  • the “computer-readable recording medium” refers to portable media such as a flexible disc, a magneto-optical disc, a ROM and a CD-ROM, and memories such as a hard disc built in the computer system.
  • the “computer-readable recording medium” may include one that dynamically holds a program for a short time, such as a communication line in the case where the program is transmitted via a network such as Internet or the communication line such as a phone line, and one that holds the program for a certain time, such as a nonvolatile memory in the computer system as a server or a client.
  • the program may perform a part of the above-mentioned function, or may perform the above-mentioned function by combination with a program previously recorded in the computer system.
  • a part or all of the mobile station apparatus 3 and the base station apparatus 1 in the above-mentioned embodiments may be implemented as an LSI (Large Scale Integration) typically as an integrated circuit.
  • the functional blocks of the mobile station apparatus 3 and the base station apparatus 1 may be individually formed into a chip, or a part or all of them may be integrated and formed into a chip.
  • the integrated circuit is not limited to the LSI and may be realized by a dedicated circuit or a general-purpose processor. With the emergence of a new technology for circuit integration in place of the LSI through progress of the semiconductor technology, the integrated circuit according to the technology can be used.

Landscapes

  • Engineering & Computer Science (AREA)
  • Signal Processing (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)
US13/576,962 2010-02-04 2011-01-14 Radio communication system, base station apparatus, mobile station apparatus and radio communication method Abandoned US20120327876A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2010-022794 2010-02-04
JP2010022794A JP5538930B2 (ja) 2010-02-04 2010-02-04 移動局装置、基地局装置、無線通信システムおよび無線通信方法
PCT/JP2011/050571 WO2011096261A1 (ja) 2010-02-04 2011-01-14 無線通信システム、基地局装置、移動局装置および無線通信方法

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2011/050571 A-371-Of-International WO2011096261A1 (ja) 2010-02-04 2011-01-14 無線通信システム、基地局装置、移動局装置および無線通信方法

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US15/073,462 Division US10080228B2 (en) 2010-02-04 2016-03-17 Radio communication system, base station apparatus, mobile station apparatus and radio communication method

Publications (1)

Publication Number Publication Date
US20120327876A1 true US20120327876A1 (en) 2012-12-27

Family

ID=44355270

Family Applications (2)

Application Number Title Priority Date Filing Date
US13/576,962 Abandoned US20120327876A1 (en) 2010-02-04 2011-01-14 Radio communication system, base station apparatus, mobile station apparatus and radio communication method
US15/073,462 Active 2031-01-21 US10080228B2 (en) 2010-02-04 2016-03-17 Radio communication system, base station apparatus, mobile station apparatus and radio communication method

Family Applications After (1)

Application Number Title Priority Date Filing Date
US15/073,462 Active 2031-01-21 US10080228B2 (en) 2010-02-04 2016-03-17 Radio communication system, base station apparatus, mobile station apparatus and radio communication method

Country Status (5)

Country Link
US (2) US20120327876A1 (enExample)
EP (1) EP2533590B1 (enExample)
JP (1) JP5538930B2 (enExample)
CN (1) CN102742343B (enExample)
WO (1) WO2011096261A1 (enExample)

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20110199944A1 (en) * 2010-02-10 2011-08-18 Qualcomm Incorporated Aperiodic sounding reference signal transmission method and apparatus
US20140219199A1 (en) * 2013-02-06 2014-08-07 Samsung Electronics Co., Ltd. Method and apparatus for transmitting channel sounding reference signal in wireless communication system
US20150326360A1 (en) * 2014-05-07 2015-11-12 Qualcomm Incorporated Non-orthogonal multiple access and interference cancellation
US20160142190A1 (en) * 2010-08-16 2016-05-19 Nokia Solutions and Network OY Transmission of Reference Signals
US20160173258A1 (en) * 2009-06-16 2016-06-16 Sharp Kabushiki Kaisha Transmitter apparatus, receiver apparatus, communication system, and communication method
CN107079307A (zh) * 2014-09-25 2017-08-18 株式会社Ntt都科摩 基站和用户装置
US9853781B2 (en) * 2011-07-05 2017-12-26 Nokia Solutions And Networks Oy Method and apparatus for resource aggregation in wireless communications
US9936491B2 (en) 2012-01-21 2018-04-03 Huawei Technologies Co., Ltd. Data sending method, data receiving method, base station and user equipment
US10050762B2 (en) 2012-09-24 2018-08-14 Interdigital Patent Holdings, Inc. Channel quality measurement and transmit power allocation in a dynamic spectrum management system
US20190158164A1 (en) * 2014-02-07 2019-05-23 Ntt Docomo, Inc. User apparatus, base station, and communication method
US10397888B2 (en) * 2017-04-18 2019-08-27 Qualcomm Incorporated Precoded CSI-RS for phase synchronization for reciprocity-based CoMP joint transmission
US10405299B2 (en) * 2016-09-14 2019-09-03 Qualcomm Incorporated Reference signal transmission based on received signal quality
US10979193B2 (en) 2017-01-06 2021-04-13 Huawei Technologies Co., Ltd. Signal transmission method, network device, and terminal device
US20210314128A1 (en) * 2018-08-09 2021-10-07 Zte Corporation Antenna group operations for wireless systems
US11337234B2 (en) * 2019-06-10 2022-05-17 At&T Intellectual Property I, L.P. Facilitating frequency selective scheduling in advanced networks

Families Citing this family (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103024908B (zh) * 2011-09-23 2015-07-22 普天信息技术研究院有限公司 一种自适应调整pdcch占用符号数的方法
US8971906B2 (en) * 2013-01-17 2015-03-03 Qualcomm Incorporated Hybrid interference alignment for mixed macro-FEMTO base station downlink
US9998267B2 (en) * 2013-09-25 2018-06-12 Nec (China) Co., Ltd. Method and apparatus for uplink data transmission in a wireless communication system
EP3051871B1 (en) * 2013-09-26 2017-10-25 Fujitsu Limited Base station, mobile station, wireless communication system, and wireless communication method
US10827491B2 (en) 2014-10-07 2020-11-03 Qualcomm Incorporated Techniques for transmitting a sounding reference signal or scheduling request over an unlicensed radio frequency spectrum band
JP2017092511A (ja) 2015-11-02 2017-05-25 富士通株式会社 基地局装置
US10484976B2 (en) * 2017-01-06 2019-11-19 Sharp Kabushiki Kaisha Signaling, procedures, user equipment and base stations for uplink ultra reliable low latency communications
US10735072B2 (en) * 2017-03-23 2020-08-04 Samsung Electronics Co., Ltd Method and apparatus for transmitting data in wireless communication system
KR102294661B1 (ko) * 2017-03-23 2021-08-30 삼성전자 주식회사 이동 통신 시스템에서의 데이터 전송 방법 및 장치
CN115021879B (zh) * 2017-08-21 2025-02-25 中兴通讯股份有限公司 参考信号传输方法及装置、终端、基站和存储介质
US11490363B2 (en) * 2018-04-18 2022-11-01 Google Llc User device-initiated bandwidth request
CN109889230B (zh) * 2019-04-03 2020-10-27 成都中科微信息技术研究院有限公司 一种电力无线专网的抗干扰跳频方法
CN110928043A (zh) 2019-11-26 2020-03-27 深圳市华星光电半导体显示技术有限公司 透明显示面板和电子设备

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080014892A1 (en) * 2006-07-17 2008-01-17 Carlos Aldana Method and system for antenna selection algorithm at the transmitter
US20090042615A1 (en) * 2007-08-06 2009-02-12 Koon Hoo Teo Method for Selecting Antennas in a Wireless Networks
US20100009707A1 (en) * 2008-07-08 2010-01-14 Nextwave Broadband Inc. Signal transmission parameter control using channel sounding
US20100111215A1 (en) * 2008-11-05 2010-05-06 Broadcom Corporation Beamforming protocol for wireless communications
US20100195532A1 (en) * 2007-04-30 2010-08-05 Nokia Siemens Networks Oy Signalling within a communication system
US20110098054A1 (en) * 2009-04-23 2011-04-28 Qualcomm Incorporated Sounding reference signal for coordinated multi-point operation
US20130107840A1 (en) * 2008-06-20 2013-05-02 Samsung Electronics Co., Ltd. Apparatus and method for transmission of sounding reference signal in uplink wireless communication systems with multiple antennas and sounding reference signal hopping

Family Cites Families (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8824420B2 (en) * 2007-03-22 2014-09-02 Mitsubishi Electric Research Laboratories, Inc. Method and system for generating antenna selection signals in OFDM tranceivers with fewer RF chains than antennas in MIMO wireless networks
US8599819B2 (en) * 2007-06-19 2013-12-03 Lg Electronics Inc. Method of transmitting sounding reference signal
CN101378290B (zh) * 2008-09-23 2013-02-27 中兴通讯股份有限公司 信号发送控制方法和装置
JP5555763B2 (ja) * 2009-03-17 2014-07-23 インターデイジタル パテント ホールディングス インコーポレイテッド サウンディング参照信号（ｓｒｓ）送信の電力制御のための方法および機器
CN102362441B (zh) 2009-03-22 2016-12-21 Lg电子株式会社 使用多个天线的信道探测方法以及用于其的装置
US8830931B2 (en) 2009-03-22 2014-09-09 Lg Electronics Inc. Method for transmitting sounding reference signals in a wireless communication system, and apparatus for same
KR101128817B1 (ko) 2009-05-15 2012-03-23 엘지전자 주식회사 무선 통신 시스템에서 사운딩 참조 신호 송신 방법 및 이를 위한 장치
KR101741397B1 (ko) 2009-05-15 2017-06-08 엘지전자 주식회사 무선 통신 시스템에서 사운딩 참조 신호 송신 방법 및 이를 위한 장치
KR101641971B1 (ko) 2009-05-15 2016-07-22 엘지전자 주식회사 무선 통신 시스템에서 사운딩 참조 신호 송신 방법 및 이를 위한 장치
KR101294815B1 (ko) * 2009-05-15 2013-08-08 엘지전자 주식회사 무선 통신 시스템에서 사운딩 참조 신호 송신 방법 및 이를 위한 장치
US9048976B2 (en) 2009-06-22 2015-06-02 Lg Electronics Inc. Apparatus and method for transmitting reference signals in wireless communication system
JP5364849B2 (ja) 2009-09-21 2013-12-11 エルジー エレクトロニクス インコーポレイティド 無線通信システムにおいてサウンディング参照信号の転送方法及びそのための装置
CN102577522B (zh) 2009-09-21 2015-12-09 Lg电子株式会社 在无线通信系统中发送探测参考信号的方法和装置
EP2337413A1 (en) * 2009-12-18 2011-06-22 Panasonic Corporation Implicit component carrier determination for aperiodic channel quality reports
WO2011090259A2 (ko) 2010-01-19 2011-07-28 엘지전자 주식회사 무선 통신 시스템에서 사운딩 참조 신호 송신 방법 및 이를 위한 장치
KR101807875B1 (ko) 2010-03-05 2017-12-12 엘지전자 주식회사 무선 통신 시스템에서 비주기적 사운딩 참조 신호 전송 방법 및 장치
KR101807874B1 (ko) 2010-03-05 2017-12-12 엘지전자 주식회사 무선 통신 시스템에서 비주기적 사운딩 참조 신호 전송 방법 및 장치

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080014892A1 (en) * 2006-07-17 2008-01-17 Carlos Aldana Method and system for antenna selection algorithm at the transmitter
US20100195532A1 (en) * 2007-04-30 2010-08-05 Nokia Siemens Networks Oy Signalling within a communication system
US20090042615A1 (en) * 2007-08-06 2009-02-12 Koon Hoo Teo Method for Selecting Antennas in a Wireless Networks
US20130107840A1 (en) * 2008-06-20 2013-05-02 Samsung Electronics Co., Ltd. Apparatus and method for transmission of sounding reference signal in uplink wireless communication systems with multiple antennas and sounding reference signal hopping
US20100009707A1 (en) * 2008-07-08 2010-01-14 Nextwave Broadband Inc. Signal transmission parameter control using channel sounding
US20100111215A1 (en) * 2008-11-05 2010-05-06 Broadcom Corporation Beamforming protocol for wireless communications
US20110098054A1 (en) * 2009-04-23 2011-04-28 Qualcomm Incorporated Sounding reference signal for coordinated multi-point operation

Cited By (25)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US10148398B2 (en) * 2009-06-16 2018-12-04 Sharp Kabushiki Kaisha Apparatus, device and method that enable efficient reference signal placement and acquires feedback information
US20160173258A1 (en) * 2009-06-16 2016-06-16 Sharp Kabushiki Kaisha Transmitter apparatus, receiver apparatus, communication system, and communication method
US20110199944A1 (en) * 2010-02-10 2011-08-18 Qualcomm Incorporated Aperiodic sounding reference signal transmission method and apparatus
US8848520B2 (en) * 2010-02-10 2014-09-30 Qualcomm Incorporated Aperiodic sounding reference signal transmission method and apparatus
US10313073B2 (en) * 2010-08-16 2019-06-04 Nokia Solutions And Networks Oy Transmission of reference signals
US20160142190A1 (en) * 2010-08-16 2016-05-19 Nokia Solutions and Network OY Transmission of Reference Signals
US10218476B2 (en) 2010-08-16 2019-02-26 Nokia Solutions And Networks Oy Transmission of reference signals
US10680768B2 (en) 2011-07-05 2020-06-09 Hmd Global Oy Method and apparatus for resource aggregation in wireless communications
US9853781B2 (en) * 2011-07-05 2017-12-26 Nokia Solutions And Networks Oy Method and apparatus for resource aggregation in wireless communications
US9936491B2 (en) 2012-01-21 2018-04-03 Huawei Technologies Co., Ltd. Data sending method, data receiving method, base station and user equipment
US10687320B2 (en) 2012-01-21 2020-06-16 Huawei Technologies Co., Ltd. Data sending method, data receiving method, base station and user equipment
US10050762B2 (en) 2012-09-24 2018-08-14 Interdigital Patent Holdings, Inc. Channel quality measurement and transmit power allocation in a dynamic spectrum management system
US9871629B2 (en) * 2013-02-06 2018-01-16 Samsung Electronics Co., Ltd. Method and apparatus for transmitting channel sounding reference signal in wireless communication system
US20140219199A1 (en) * 2013-02-06 2014-08-07 Samsung Electronics Co., Ltd. Method and apparatus for transmitting channel sounding reference signal in wireless communication system
US20190158164A1 (en) * 2014-02-07 2019-05-23 Ntt Docomo, Inc. User apparatus, base station, and communication method
US10998952B2 (en) * 2014-02-07 2021-05-04 Ntt Docomo, Inc. User apparatus and signal transmission method for mapping sounding reference signals
US9942013B2 (en) * 2014-05-07 2018-04-10 Qualcomm Incorporated Non-orthogonal multiple access and interference cancellation
US20150326360A1 (en) * 2014-05-07 2015-11-12 Qualcomm Incorporated Non-orthogonal multiple access and interference cancellation
CN107079307A (zh) * 2014-09-25 2017-08-18 株式会社Ntt都科摩 基站和用户装置
US10405299B2 (en) * 2016-09-14 2019-09-03 Qualcomm Incorporated Reference signal transmission based on received signal quality
US10979193B2 (en) 2017-01-06 2021-04-13 Huawei Technologies Co., Ltd. Signal transmission method, network device, and terminal device
US10397888B2 (en) * 2017-04-18 2019-08-27 Qualcomm Incorporated Precoded CSI-RS for phase synchronization for reciprocity-based CoMP joint transmission
US20210314128A1 (en) * 2018-08-09 2021-10-07 Zte Corporation Antenna group operations for wireless systems
US11968152B2 (en) * 2018-08-09 2024-04-23 Zte Corporation Antenna group operations for wireless systems
US11337234B2 (en) * 2019-06-10 2022-05-17 At&T Intellectual Property I, L.P. Facilitating frequency selective scheduling in advanced networks

Also Published As

Publication number Publication date
JP2011160376A (ja) 2011-08-18
EP2533590A4 (en) 2017-01-25
EP2533590B1 (en) 2019-08-28
US20160205687A1 (en) 2016-07-14
WO2011096261A1 (ja) 2011-08-11
US10080228B2 (en) 2018-09-18
CN102742343A (zh) 2012-10-17
EP2533590A1 (en) 2012-12-12
JP5538930B2 (ja) 2014-07-02
CN102742343B (zh) 2016-11-16

Similar Documents

Publication Publication Date Title
US10080228B2 (en) Radio communication system, base station apparatus, mobile station apparatus and radio communication method
US9876617B2 (en) Wireless communication system, base station apparatus, mobile station apparatus, wireless communication method and integrated circuit
CN113169779B (zh) 终端装置以及通信方法
AU2012369247B2 (en) User equipment, network node and methods therein for determining a transport block size in downlink transmissions in a telecommunications system
CA2834556C (en) Method and system for transmission and reception of signals and related method of signaling
WO2019111619A1 (ja) 端末装置、基地局装置および通信方法
JP2020010072A (ja) 基地局装置、端末装置および通信方法
JP2019140512A (ja) 端末装置、基地局装置および通信方法
US20130194951A1 (en) Method and apparatus for providing data service using broadcasting signal
WO2019065189A1 (ja) 基地局装置、端末装置および通信方法
JP2019216295A (ja) 基地局装置、端末装置および通信方法
JP2019054305A (ja) 基地局装置、端末装置および通信方法
WO2019065191A1 (ja) 基地局装置、端末装置および通信方法
JP2018201253A (ja) ユーザ端末及び無線通信方法
JP2012080328A (ja) 移動局装置、無線通信システムおよび無線通信方法
JP6128692B2 (ja) 移動局装置、基地局装置および通信方法
JP2011249984A (ja) 移動局装置、基地局装置、無線通信システム、無線通信方法および集積回路
JP2011171972A (ja) 移動局装置、基地局装置、無線通信システムおよび無線通信方法
WO2011122478A1 (ja) 無線通信システム、基地局装置、移動局装置、無線通信方法および集積回路
JP5756546B2 (ja) 移動局装置、基地局装置および通信方法
JP2019054304A (ja) 基地局装置、端末装置および通信方法
US20240114510A1 (en) Pscch and pssch transmission on contiguous rb sets in sl-u
WO2021145409A1 (ja) 通信装置および通信方法
JP2019149759A (ja) 通信装置および通信方法

Legal Events

Date Code Title Description
AS Assignment

Owner name: SHARP KABUSHIKI KAISHA, JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:OUCHI, WATARU;AIBA, TATSUSHI;SUZUKI, SHOICHI;REEL/FRAME:028894/0707

Effective date: 20120806

STCB Information on status: application discontinuation

Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION