US20100208603A1 - Receiving apparatus and data obtaining method - Google Patents

Receiving apparatus and data obtaining method Download PDF

Info

Publication number
US20100208603A1
US20100208603A1 US12/672,439 US67243908A US2010208603A1 US 20100208603 A1 US20100208603 A1 US 20100208603A1 US 67243908 A US67243908 A US 67243908A US 2010208603 A1 US2010208603 A1 US 2010208603A1
Authority
US
United States
Prior art keywords
downlink
signal
estimated
power level
uplink
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
US12/672,439
Other languages
English (en)
Inventor
Hiroyuki Ishii
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.)
NTT Docomo Inc
Original Assignee
NTT Docomo Inc
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 NTT Docomo Inc filed Critical NTT Docomo Inc
Assigned to NTT DOCOMO, INC. reassignment NTT DOCOMO, INC. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: ISHII, HIROYUKI
Publication of US20100208603A1 publication Critical patent/US20100208603A1/en
Abandoned legal-status Critical Current

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/26—Systems using multi-frequency codes
    • H04L27/2601—Multicarrier modulation systems
    • H04L27/2602—Signal structure
    • H04L27/2605—Symbol extensions, e.g. Zero Tail, Unique Word [UW]
    • 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
    • H04B1/707—Spread spectrum techniques using direct sequence modulation
    • H04B1/7097—Interference-related aspects
    • H04B1/711—Interference-related aspects the interference being multi-path interference
    • H04B1/7113—Determination of path profile
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/364—Delay profiles
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413—MIMO systems
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0212—Channel estimation of impulse response
    • H04L25/0216—Channel estimation of impulse response with estimation of channel length
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L25/00—Baseband systems
    • H04L25/02—Details ; arrangements for supplying electrical power along data transmission lines
    • H04L25/0202—Channel estimation
    • H04L25/0224—Channel estimation using sounding signals
    • H04L25/0228—Channel estimation using sounding signals with direct estimation from sounding signals
    • H04L25/023—Channel estimation using sounding signals with direct estimation from sounding signals with extension to other symbols
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/318—Received signal strength
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H04B17/336—Signal-to-interference ratio [SIR] or carrier-to-interference ratio [CIR]

Definitions

  • the present invention generally relates to a receiving apparatus. More particularly, the present invention relates to a receiving apparatus and a data obtaining method for obtaining information regarding a mobile communication system.
  • communication quality in radio communications greatly influences transmission characteristics and quality of service.
  • network operators evaluate communication quality in their communication areas and try to improve the communication quality by adjusting various parameters.
  • “communication quality” is represented, for example, by a delay profile or a received signal-to-interference ratio (SIR).
  • Japanese Patent Application Publication No. 11-193699 discloses a service area evaluation system and a method and an apparatus for obtaining service area evaluation data used for evaluation of communication quality in a communication area.
  • CDMA generally, dedicated channels are used for communications and transmission power control is used for link adaptation, a technology for adapting to fluctuations in reception levels such as Rayleigh fading and shadow fading.
  • LTE Long Term Evolution
  • SC-FDMA single-carrier frequency division multiple access
  • OFDM is a multi-carrier transmission method where a frequency band is divided into multiple narrow frequency bands (subcarriers) and data are transmitted on the subcarriers.
  • the subcarriers are densely arranged along the frequency axis such that they partly overlap each other but do not interfere with each other. This method enables high-speed transmission and improves frequency efficiency.
  • SC-FDMA is a single-carrier transmission method where a frequency band is divided into multiple frequency bands and the frequency bands are allocated to different terminals for transmission in order to reduce interference between the terminals. Also, SC-FDMA reduces variation of the transmission power and therefore makes it possible to reduce power consumption of terminals and to achieve wide coverage.
  • shared channels are used for both uplink and downlink, and adaptive modulation and coding (AMC) is used for link adaptation.
  • AMC adaptive modulation and coding
  • a mobile communication system based on LTE uses OFDM and SC-FDMA that are different from communication methods used in a CDMA-based mobile communication system.
  • a CDMA-based mobile communication system uses transmission power control for link adaptation and dedicated channels for communications
  • a mobile communication system based on LTE uses adaptive modulation and coding for link adaptation and shared channels for communications. Therefore, for a mobile communication system based on LTE, it is not possible to use, without change, a receiving method and a receiving apparatus for service (communication) area evaluation as disclosed in Japanese Patent Application Publication No. 11-193699
  • One object of the present invention is to provide a receiving apparatus and a data obtaining method that make it possible to evaluate communication quality in a communication area of a mobile communication system employing OFDM and SC-FDMA, adaptive modulation and coding, and/or shared channels.
  • a receiving apparatus includes a receiving unit configured to receive a first signal transmitted from a base station; a delay profile calculation unit configured to calculate a downlink delay profile based on the first signal; an estimated value calculation unit configured to calculate an estimated propagation path delay or an estimated cyclic prefix length based on the calculated downlink delay profile; and an outputting unit configured to output the estimated propagation path delay or the estimated cyclic prefix length.
  • a receiving apparatus includes a receiving unit configured to receive a first signal transmitted from a base station; an estimated value calculation unit configured to obtain downlink quality information based on the first signal and to calculate an estimated downlink throughput based on the downlink quality information; and an outputting unit configured to output the estimated downlink throughput.
  • a receiving apparatus includes a receiving unit configured to receive a first signal transmitted from multiple base stations that perform downlink transmission in synchronization with each other; an estimated value calculation unit configured to obtain downlink quality information based on the first signal and to calculate an estimated downlink throughput based on the downlink quality information; and an outputting unit configured to output the estimated downlink throughput.
  • a receiving apparatus includes a communication unit configured to communicate with a base station; a receiving unit configured to receive a second signal transmitted from the base station; an estimated value calculation unit configured to calculate an estimated downlink throughput based on information in the second signal; and an outputting unit configured to output the estimated downlink throughput.
  • a receiving apparatus includes a receiving unit configured to receive a first signal transmitted from a base station; a first calculation unit configured to calculate, based on the first signal, a received power level of the first signal, a downlink received power level, a value obtained by dividing the received power level of the first signal by the downlink received power level, and a path loss for an entire frequency band of a mobile communication system; a second calculation unit configured to calculate, based on the first signal, the received power level of the first signal, the downlink received power level, the value obtained by dividing the received power level of the first signal by the downlink received power level, and the path loss for a part of the entire frequency band of the mobile communication system; and an outputting unit configured to output the received power level of the first signal, the downlink received power level, the value obtained by dividing the received power level of the first signal by the downlink received power level, and the path loss.
  • a receiving apparatus includes a receiving unit configured to receive a first signal transmitted from a base station; a path loss calculation unit configured to calculate a path loss based on the first signal; an uplink quality calculation unit configured to calculate, based on the path loss, an estimated uplink transmission power level of a fourth signal, an estimated uplink SIR, an estimated uplink throughput, and UE power headroom; and an outputting unit configured to output the estimated uplink transmission power level of the fourth signal, the estimated uplink SIR, the estimated uplink throughput, and the UE power headroom.
  • a receiving apparatus includes a communication unit configured to communicate with a base station; a receiving unit configured to receive a third signal transmitted from the base station; an uplink quality calculation unit configured to calculate an estimated uplink transmission power level of a fourth signal, an estimated uplink throughput, and UE power headroom; and an outputting unit configured to output the estimated uplink transmission power level of the fourth signal, the estimated uplink throughput, and the UE power headroom.
  • a receiving apparatus includes a receiving unit configured to receive a fifth signal transmitted from a base station; an error rate calculation unit configured to calculate an error rate of the fifth signal; and an outputting unit configured to output the error rate of the fifth signal.
  • a data obtaining method includes a receiving step of receiving a first signal transmitted from a base station; a delay profile calculation step of calculating a downlink delay profile based on the first signal; an estimated value calculation step of calculating an estimated propagation path delay or an estimated cyclic prefix length based on the calculated downlink delay profile; and an outputting step of outputting the estimated propagation path delay or the estimated cyclic prefix length.
  • a data obtaining method includes a receiving step of receiving a first signal transmitted from a base station; a quality information obtaining step of obtaining downlink quality information based on the first signal; an estimated value calculation step of calculating an estimated downlink throughput based on the downlink quality information; and an outputting step of outputting the estimated downlink throughput.
  • a data obtaining method includes a receiving step of receiving a first signal transmitted from multiple base stations that perform downlink transmission in synchronization with each other; a quality information obtaining step of obtaining downlink quality information based on the first signal; an estimated value calculation step of calculating an estimated downlink throughput based on the downlink quality information; and an outputting step of outputting the estimated downlink throughput.
  • a data obtaining method includes a receiving step of receiving a second signal transmitted from a base station; an estimated value calculation step of calculating an estimated downlink throughput based on information in the second signal; and an outputting step of outputting the estimated downlink throughput.
  • a data obtaining method includes a receiving step of receiving a first signal transmitted from a base station; a first calculation step of calculating, based on the first signal, a received power level of the first signal, a downlink received power level, a value obtained by dividing the received power level of the first signal by the downlink received power level, and a path loss for an entire frequency band of a mobile communication system; a second calculation step of calculating, based on the first signal, the received power level of the first signal, the downlink received power level, the value obtained by dividing the received power level of the first signal by the downlink received power level, and the path loss for a part of the entire frequency band of the mobile communication system; and an output step of outputting the received power level of the first signal, the downlink received power level, the value obtained by dividing the received power level of the first signal by the downlink received power level, and the path loss.
  • a data obtaining method includes a receiving step of receiving a first signal transmitted from a base station; a path loss calculation step of calculating a path loss based on the first signal; an uplink quality calculation step of calculating, based on the path loss, an estimated uplink transmission power level of a fourth signal, an estimated uplink SIR, an estimated uplink throughput, and UE power headroom; and an outputting step of outputting the estimated uplink transmission power level of the fourth signal, the estimated uplink SIR, the estimated uplink throughput, and the UE power headroom.
  • a data obtaining method includes a receiving step of receiving a third signal transmitted from a base station; an uplink quality calculation step of calculating an estimated uplink transmission power level of a fourth signal, an estimated uplink throughput, and UE power headroom; and an outputting step of outputting the estimated uplink transmission power level of the fourth signal, the estimated uplink throughput, and the UE power headroom.
  • An aspect of the present invention provides a receiving apparatus and a data obtaining method that make it possible to evaluate communication quality in a communication area of a mobile communication system employing OFDM and SC-FDMA, adaptive modulation and coding, and/or shared channels.
  • FIG. 1 is a drawing illustrating a configuration of a radio communication system according to an embodiment of the present invention
  • FIG. 2 is a drawing illustrating exemplary mapping of a downlink reference signal to physical resources
  • FIG. 3 is a block diagram of a base station according to an embodiment of the present invention.
  • FIG. 4 is a block diagram of a baseband signal processing unit of a base station according to an embodiment of the present invention.
  • FIG. 5 is a block diagram of a receiving apparatus according to an embodiment of the present invention.
  • FIG. 6 is a block diagram illustrating a receiving unit of a baseband signal processing unit of a receiving apparatus according to an embodiment of the present invention
  • FIG. 7 is a drawing used to describe an exemplary method of calculating CQIs
  • FIG. 8 is a drawing used to describe an exemplary method of calculating CQIs
  • FIG. 9 is a block diagram illustrating a receiving unit of a baseband signal processing unit of a receiving apparatus according to an embodiment of the present invention.
  • FIG. 10 is a graph used to describe an average delay profile calculation process at a baseband signal processing unit of a receiving apparatus according to an embodiment of the present invention.
  • FIG. 11 is a graph used to describe an average delay profile calculation process at a baseband signal processing unit of a receiving apparatus according to an embodiment of the present invention.
  • FIG. 12 is a flowchart showing a data obtaining process performed by a receiving apparatus according to an embodiment of the present invention.
  • FIG. 13 is a flowchart showing a data obtaining process performed by a receiving apparatus according to an embodiment of the present invention.
  • FIG. 14 is a flowchart showing a data obtaining process performed by a receiving apparatus according to an embodiment of the present invention.
  • FIG. 15 is a flowchart showing a data obtaining process performed by a receiving apparatus according to an embodiment of the present invention.
  • FIG. 16 is a drawing illustrating a configuration of a radio communication system according to an embodiment of the present invention.
  • FIG. 17 is a block diagram illustrating a receiving unit of a baseband signal processing unit of a receiving apparatus according to an embodiment of the present invention.
  • FIG. 18 is a block diagram of a receiving apparatus according to an embodiment of the present invention.
  • FIG. 19 is a block diagram illustrating a receiving unit of a baseband signal processing unit of a receiving apparatus according to an embodiment of the present invention.
  • a receiving apparatus 600 of this embodiment is used to evaluate communication quality in a communication area.
  • the receiving apparatus 600 receives a downlink signal transmitted from a base station, calculates downlink communication quality and uplink communication quality based on the received signal, and outputs the calculated quality. Accordingly, in this embodiment, a receiving unit for receiving a reference signal, a calculation unit for calculating downlink and uplink communication quality, and an output unit for outputting the calculated communication quality included in the receiving apparatus 600 are mainly described.
  • a radio communication system 1000 including the receiving apparatus 600 and a base station 200 of this embodiment is described below with reference to FIG. 1 .
  • the radio communication system 1000 is based on, for example, Evolved UTRA and UTRAN (also called Long Term Evolution (LTE) or Super 3G).
  • the radio communication system 1000 includes the base station (eNode B: eNB) 200 , mobile stations 100 n ( 100 1 , 100 2 , 100 3 . . . 100 n , where n is an integer greater than 0), and the receiving apparatus 600 located in a cell 50 that is an area where a mobile communication service is provided by the base station 200 .
  • the base station 200 is connected to an upper node such as an access gateway 300 and the access gateway 300 is connected to a core network 400 .
  • the access gateway 300 may also be called a mobility management entity/serving gateway (MME/SGW).
  • MME/SGW mobility management entity/serving gateway
  • the base station 200 may have two or more sectors.
  • the receiving apparatus 600 may or may not be communicating with the base station 200 based on Evolved UTRA and UTRAN.
  • the receiving apparatus 600 communicates with the base station 200 based on Evolved UTRA and UTRAN, communication processing similar to that performed between the mobile stations 100 n and the base station 200 is performed between the receiving apparatus 600 and the base station 200 .
  • the mobile stations 100 n ( 100 1 , 100 2 , 100 3 , . . . , 100 n ) have the same configuration and functions and are therefore called the mobile station 100 n or the mobile stations 100 n in the descriptions below unless otherwise mentioned.
  • mobile stations are used as examples of user equipment (UE) communicating with a base station in the descriptions below, user equipment communicating with a base station may also include fixed terminals.
  • orthogonal frequency division multiplexing (OFDM) is used as the downlink radio access method and single-carrier frequency division multiple access (SC-FDMA) is used as the uplink radio access method.
  • OFDM orthogonal frequency division multiplexing
  • SC-FDMA single-carrier frequency division multiple access
  • OFDM orthogonal frequency division multiplexing
  • a frequency band is divided into narrow frequency bands (subcarriers) and data are transmitted on the subcarriers.
  • SC-FDMA a frequency band is divided into multiple frequency bands and the frequency bands are allocated to different terminals for transmission in order to reduce interference between the terminals.
  • a physical downlink shared channel (PDSCH) shared by the mobile stations 100 n and a physical downlink control channel (PDCCH), which is a downlink control channel for LTE are used.
  • the physical downlink control channel is used to report: downlink scheduling information including information on users to be mapped to the physical downlink shared channel and transport format information for the physical downlink shared channel; an uplink scheduling grant including information on users to be mapped to a physical uplink shared channel and transport format information for the physical uplink shared channel; and acknowledgement information for an uplink shared channel.
  • the physical downlink shared channel is used to transmit packet data.
  • a transport channel for the packet data is a downlink shared channel (DL SCH).
  • the downlink scheduling information may also be called downlink assignment information or a downlink scheduling grant.
  • the downlink scheduling information and the uplink scheduling grant may be collectively called downlink control information.
  • a downlink reference signal is transmitted as a pilot signal.
  • the downlink reference signal is a two-dimensional sequence composed of a two-dimensional orthogonal sequence and a two-dimensional pseudo random sequence (see, for example, 3GPP TS 36.211 (V1.0.0), “Physical Channels and Modulation,” March 2007).
  • the downlink reference signal may be composed of a two-dimensional pseudo random sequence only.
  • FIG. 2 shows exemplary mapping of the downlink reference signal to physical resources.
  • a physical uplink shared channel (PUSCH) shared by the mobile stations 100 n and an LTE uplink control channel are used.
  • the uplink control channel to be frequency-division-multiplexed with the physical uplink shared channel is called a physical uplink control channel (PUCCH).
  • a control signal mapped to the uplink control channel to be time-division-multiplexed with the physical uplink shared channel may be transmitted as a part of the physical uplink shared channel.
  • the LTE physical uplink control channel is used to report downlink quality information (channel quality indicator: CQI) used for scheduling and adaptive modulation and coding (AMC) of a downlink shared channel and to transmit acknowledgement information (HARQ ACK information) for a downlink shared channel.
  • CQI channel quality indicator
  • AMC adaptive modulation and coding
  • HARQ ACK information acknowledgement information
  • the physical uplink shared channel is used to transmit packet data.
  • a transport channel for the packet data is an uplink shared channel (UL-SCH).
  • packet data examples include IP packets in Web browsing, FTP, and VoIP, and a control signal for radio resource control (RRC).
  • packet data may also be called user data.
  • Corresponding transport channels for the packet data (user data) are the DL-SCH and the UL-SCH, and corresponding logical channels for the packet data (user data) are a dedicated traffic channel (DTCH) and a dedicated control channel (DCCH).
  • DTCH dedicated traffic channel
  • DCCH dedicated control channel
  • the base station 200 of this embodiment is described below with reference to FIG. 3 .
  • the base station 200 of this embodiment includes a transceiver antenna 202 , an amplifier 204 , a transceiver unit 206 , a baseband signal processing unit 208 , a call processing unit 210 , and a transmission path interface 212 .
  • Downlink packet data (user data) to be transmitted from the base station 200 to the mobile station 100 n are sent from an upper node such as the access gateway 300 to the base station 200 and input to the baseband signal processing unit 208 via the transmission path interface 212 .
  • the baseband signal processing unit 208 performs, for the downlink packet data, PDCP layer transmission processing; segmentation/concatenation; RLC layer transmission processing such as transmission processing in RLC (radio link control) retransmission control; MAC (medium access control) retransmission control such as transmission processing in hybrid automatic repeat request (HARQ); scheduling; selection of transport formats; channel coding; and IFFT (inverse fast Fourier transform) processing. Then, the baseband signal processing unit 208 inputs the processed packet data to the transceiver unit 206 .
  • the baseband signal processing unit 208 also performs transmission processing such as channel coding and IFFT processing on a physical downlink control channel signal (downlink control channel for LTE) and a broadcast channel signal, and inputs the processed signals to the transceiver unit 206 . Further, the baseband signal processing unit 208 generates a downlink reference signal (downlink pilot signal). The baseband signal processing unit 208 multiplexes the downlink reference signal, the packet data, the physical downlink control channel signal, and the broadcast channel signal, and inputs the multiplexed signal (baseband signal) to the transceiver unit 206 .
  • transmission processing such as channel coding and IFFT processing on a physical downlink control channel signal (downlink control channel for LTE) and a broadcast channel signal
  • the baseband signal processing unit 208 generates a downlink reference signal (downlink pilot signal).
  • the baseband signal processing unit 208 multiplexes the downlink reference signal, the packet data, the physical downlink control channel signal, and the broadcast channel signal, and inputs the
  • the transceiver unit 206 performs frequency conversion to convert the baseband signal output from the baseband signal processing unit 208 into a radio frequency signal.
  • the radio frequency signal is amplified by the amplifier 204 and transmitted from the transceiver antenna 202 .
  • the radio frequency signal is received by the transceiver antenna 202 , amplified by the amplifier 204 , and frequency-converted by the transceiver unit 206 into a baseband signal. Then, the transceiver unit 206 inputs the baseband signal to the baseband signal processing unit 208 .
  • the baseband signal processing unit 208 For the packet data in the input baseband signal, the baseband signal processing unit 208 performs FFT processing, IDFT processing, error correction decoding, reception processing in MAC retransmission control, RLC layer reception processing, PDCP layer reception processing, and so on. The processed packet data are transferred via the transmission path interface 212 to the access gateway 300 . The baseband signal processing unit 208 also performs FFT processing and error correction decoding on acknowledgement information for a downlink shared channel and downlink quality information transmitted from the mobile station 100 n and included in the baseband signal.
  • the call processing unit 210 performs call processing such as establishment and release of communication channels, status management of the base station 200 , and management of radio resources.
  • the baseband signal processing unit 208 includes a layer 1 processing unit 2081 , a MAC (medium access control) processing unit 2082 , and an RLC processing unit 2083 .
  • the layer 1 processing unit 2081 includes a transmission processing unit 20811 , a reception processing unit 20812 , a control channel signal generating unit 20813 , a data channel signal generating unit 20814 , a broadcast channel signal generating unit 20815 , a reference signal generating unit 20816 , and an uplink demodulation unit 20817 .
  • the layer 1 processing unit 2081 , the MAC processing unit 2082 , and the RLC processing unit 2083 of the baseband signal processing unit 208 and the call processing unit 210 are connected to each other.
  • the control channel signal generating unit 20813 , the data channel signal generating unit 20814 , the broadcast channel signal generating unit 20815 , and the uplink demodulation unit 20817 of the layer 1 processing unit 2081 and the MAC processing unit 2082 are connected to each other.
  • the layer 1 processing unit 2081 performs channel coding and IFFT processing on downlink transmission signals, and performs channel decoding and FFT processing on uplink transmission signals.
  • the control channel signal generating unit 20813 performs encoding, such as turbo coding and/or convolutional coding, and interleaving on a physical downlink control channel (PDCCH) to generate a PDCCH signal, and inputs the PDCCH signal to the transmission processing unit 20811 .
  • the data channel signal generating unit 20814 performs encoding, such as turbo coding and/or convolutional coding, and interleaving on a downlink shared channel (DL-SCH) (corresponding to a physical downlink shared channel (PDSCH)) to generate a DL-SCH signal, and inputs the DL-SCH signal to the transmission processing unit 20811 .
  • DL-SCH downlink shared channel
  • PDSCH physical downlink shared channel
  • the broadcast channel signal generating unit 20815 performs encoding, such as turbo coding and/or convolutional coding, and interleaving on a broadcast channel (BCH) (corresponding to a physical broadcast channel (P-BCH) or a dynamic broadcast channel (D-BCH)) to generate a BCH signal, and inputs the BCH signal to the transmission processing unit 20811 .
  • BCH broadcast channel
  • the dynamic broadcast channel is also called a broadcast channel transmitted via the physical downlink shared channel (BCH on PDSCH).
  • the reference signal generating unit 20816 generates a downlink reference signal and inputs the downlink reference signal to the transmission processing unit 20811 .
  • the transmission processing unit 20811 multiplexes the input signals, performs IFFT processing on the multiplexed signal, adds CPs to the IFFT-processed signal, and inputs the resulting signal to the transceiver unit 206 .
  • the transceiver unit 206 converts the signal into a baseband signal and inputs the baseband signal to the reception processing unit 20812 .
  • the reception processing unit 20812 performs CP removal, FFT processing, frequency equalization, and inverse discrete Fourier transform (IDFT) processing on the baseband signal, and inputs the processed signal to the uplink demodulation unit 20817 .
  • the uplink demodulation unit 20817 decodes the (convolutional-coded and/or turbo-coded) signal, and inputs the decoded signal to the MAC processing unit 2082 .
  • the MAC processing unit 2082 receives, from the uplink demodulation unit 20817 of the layer 1 processing unit 2081 , the decoded signal including the downlink quality information, the acknowledgement information for a downlink shared channel, and the uplink shared channel.
  • the MAC processing unit 2082 performs MAC retransmission control such as transmission processing in HARQ, scheduling, selection of transport formats, allocation of frequency resources, and so on for downlink packet data.
  • scheduling indicates a process of selecting mobile stations allowed to receive the downlink packet data using a downlink shared channel in a given subframe.
  • selection of transport formats indicates a process of determining modulation schemes, coding rates, and data sizes of the downlink packet data to be received by the mobile stations selected in the scheduling. The modulation schemes, coding rates, and data sizes are determined, for example, based on CQIs reported via uplink by the mobile stations.
  • “Allocation of frequency resources” indicates a process of allocating resource blocks to the downlink packet data to be received by the mobile stations selected in the scheduling.
  • the resource blocks are allocated, for example, based on CQIs reported via uplink by the mobile stations.
  • the CQIs reported by the mobile stations are input from the layer 1 processing unit 2081 to the MAC processing unit 2082 .
  • the MAC processing unit 2082 generates downlink scheduling information including IDs of users (mobile stations) allowed to communicate using the physical downlink shared channel and transport format information for downlink packet data to be transmitted via the physical downlink shared channel.
  • the downlink scheduling information is determined through the scheduling, the selection of transport formats, and the allocation of frequency resources described above.
  • the MAC processing unit 2082 inputs the downlink scheduling information to the layer 1 processing unit 2081 .
  • the MAC processing unit 2082 also inputs the downlink packet data to be transmitted to the mobile stations to the layer 1 processing unit 2081 .
  • the MAC processing unit 2082 performs reception processing in MAC retransmission control, scheduling, selection of transport formats, allocation of frequency resources, and so on for uplink packet data.
  • scheduling indicates a process of selecting mobile stations allowed to transmit the uplink packet data using an uplink shared channel in a given subframe.
  • selection of transmission formats indicates a process of determining modulation schemes, coding rates, and data sizes of the uplink packet data to be transmitted by the mobile stations selected in the scheduling. The modulation schemes, coding rates, and data sizes are determined, for example, based on SIRs of sounding reference signals (SRS) transmitted from the mobile stations via uplink and/or path losses between the base station and the mobile stations.
  • SRS sounding reference signals
  • “Allocation of frequency resources” indicates a process of allocating resource blocks to the uplink packet data to be transmitted by the mobile stations selected in the scheduling.
  • the resource blocks are allocated, for example, based on SIRs of sounding reference signals (SRS) transmitted from the mobile stations via uplink.
  • the MAC processing unit 2082 generates an uplink scheduling grant(s) including IDs of users (mobile stations) allowed to communicate using the physical uplink shared channel and transport format information for uplink packet data to be transmitted via the physical uplink shared channel.
  • the uplink scheduling grant is determined through the scheduling, the selection of transport formats, and the allocation of frequency resources described above.
  • the MAC processing unit 2082 inputs the uplink scheduling grant to the layer 1 processing unit 2081 .
  • the MAC processing unit 2082 also generates acknowledgement information for the uplink shared channel (UL-SCH) based on its demodulation result, and inputs the acknowledgement information to the layer 1 processing unit 2081 .
  • UL-SCH acknowledgement information for the uplink shared channel
  • the RLC processing unit 2083 performs, for downlink packet data, RLC layer transmission processing such as segmentation/concatenation and transmission processing in RLC retransmission control; and performs, for uplink packet data, RLC layer reception processing for uplink packet data such as segmentation/concatenation and reception processing in RLC retransmission control.
  • the RLC processing unit 2083 may be configured to perform PDCP layer processing in addition to the RLC layer processing described above.
  • the receiving apparatus 600 receives a downlink signal transmitted from the base station 200 , calculates downlink communication quality and uplink communication quality based on the received signal, and outputs the calculated quality. Components relevant to these functions of the receiving apparatus 600 are mainly described below.
  • the receiving apparatus 600 includes an antenna 602 , an amplifier 604 , a transceiver unit 606 , a baseband signal processing unit 608 , and an external input/output unit 610 .
  • a downlink radio frequency signal transmitted from the base station 200 is received by the antenna 602 and input to the amplifier 604 .
  • the amplifier 604 amplifies the radio frequency signal and inputs the amplified radio frequency signal to the transceiver unit 606 .
  • the transceiver unit 606 frequency-converts the amplified radio frequency signal into a baseband signal and inputs the baseband signal to the baseband signal processing unit 608 .
  • the baseband signal processing unit 608 performs reception processing for the baseband signal such as FFT processing and error correction decoding.
  • the baseband signal processing unit 608 performs an expected (estimated) CP length calculation process of calculating a delay profile and outputting an estimated propagation path delay or an expected (estimated) cyclic prefix (CP) length; a downlink quality calculation process of calculating downlink quality and/or an expected (estimated) downlink throughput; an uplink quality calculation process of calculating an expected (estimated) uplink transmission power level and/or an expected (estimated) uplink throughput; and a measuring process of calculating a reception level of the reference signal and/or a downlink reception level.
  • the term “expected” may be replaced with “estimated”.
  • the baseband signal processing unit 608 includes an analog-to-digital conversion unit (A/D) 6080 , a CP removing unit 6081 , an FFT 6082 , a DeMUX 6083 , a data signal decoding unit 6084 , a downlink reference signal receiving unit 6085 , an uplink quality measuring'unit 6086 , a downlink quality measuring unit 6087 , a delay profile measuring unit 6088 , a reference signal measuring unit 6089 , and an error rate obtaining unit 6090 .
  • A/D analog-to-digital conversion unit
  • the analog-to-digital conversion unit (A/D) 6080 converts an analog baseband signal input from the transceiver unit 606 into a digital signal and inputs the digital signal to the CP removing unit 6081 .
  • the CP removing unit 6081 removes CPs from received symbols and inputs remaining effective symbols to the FFT 6082 .
  • the fast Fourier transform unit (FFT) 6082 fast-Fourier-transforms the input signal and thereby OFDM-demodulates the signal, and inputs the demodulated signal to the DeMUX 6083 .
  • the demultiplexing unit (DeMUX) 6083 separates a downlink reference signal and a common channel signal from the demodulated signal, inputs the downlink reference signal to the downlink reference signal receiving unit 6085 , and inputs the common channel signal to the data signal decoding unit 6084 .
  • the downlink reference signal receiving unit 6085 performs channel estimation based on the downlink reference signal and determines channel compensation to be applied to a received data signal. In other words, the downlink reference signal receiving unit 6085 calculates a channel estimate.
  • the downlink reference signal receiving unit 6085 inputs the calculated channel estimate to the data signal decoding unit 6084 .
  • the downlink reference signal receiving unit 6085 also inputs the downlink reference signal and the channel estimate to the uplink quality measuring unit 6086 , the downlink quality measuring unit 6087 , the delay profile measuring unit 6088 , the reference signal measuring unit 6089 , and the error rate obtaining unit 6090 .
  • the data signal decoding unit 6084 receives the channel estimate from the downlink reference signal receiving unit 6085 , and applies channel compensation based on the channel estimate to the downlink data signal received from the base station 200 to decode the downlink data signal.
  • the data signal indicates the common channel signal transmitted from the base station 200 .
  • the common channel signal includes common channels such as a physical broadcast channel (P-BCH), a dynamic broadcast channel (D-BCH), downlink scheduling information for the D-BCH, a paging channel (PCH), and/or a paging indicator (PI) (downlink scheduling information for the PCH).
  • P-BCH physical broadcast channel
  • D-BCH dynamic broadcast channel
  • PCH paging channel
  • PI paging indicator
  • the data signal decoding unit 6084 reports the decoding results to the error rate obtaining unit 6090 .
  • Logical channels corresponding to the common channels are, for example, a broadcast control channel (BCCH) and a paging control channel (PCCH).
  • BCCH broadcast control channel
  • the data signal decoding unit 6084 obtains information from the P-BCH and the D-BCH, and inputs the obtained information to relevant components of the receiving apparatus 600 as needed. For example, the data signal decoding unit 6084 may obtain information regarding the transmission power level of the downlink reference signal from the P-BCH or the D-BCH, and input the obtained information to the uplink quality measuring unit 6086 and the reference signal measuring unit 6089 . Also, the data signal decoding unit 6084 may obtain information (P 0 ) regarding uplink transmission power control from the P-BCH or the D-BCH, and input the obtained information to the uplink quality measuring unit 6086 .
  • the uplink quality measuring unit 6086 receives the channel estimate and the downlink reference signal from the downlink reference signal receiving unit 6085 . Based on the downlink reference signal, the uplink quality measuring unit 6086 calculates a path loss; and calculates an expected (estimated) uplink transmission power level, an expected (estimated) uplink SIR, an expected (estimated) uplink throughput, and UE power headroom based on the calculated path loss.
  • a received power level of the downlink reference signal (reference signal received power (RSRP)) is calculated based on the channel estimate and the downlink reference signal (see, 3GPP TS36.214, v 1.0.0, 2007-05, for a definition of the reference signal received power (RSRP)).
  • RSRP reference signal received power
  • a path loss is calculated based on the received power level of the downlink reference signal and a transmission power level of the downlink reference signal at the base station 200 as follows:
  • Path loss (transmission power level of downlink reference signal) ⁇ (received power level of downlink reference signal)
  • the path loss is represented in dB.
  • the transmission power level of the downlink reference signal may be provided as a parameter in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 . Also, the transmission power level of the downlink reference signal may be determined based on the information regarding the transmission power level of the downlink reference signal obtained from the P-BCH or the D-BCH. The information regarding the transmission power level of the downlink reference signal obtained from the P-BCH or the D-BCH is input from the data signal decoding unit 6084 .
  • the received power level of the downlink reference signal and a downlink received carrier power level may be measured in one of the following three methods:
  • the three methods may be provided as parameters in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • the uplink quality measuring unit 6086 calculates an expected (estimated) transmission power level of an uplink transmission signal, an expected (estimated) uplink throughput, and UE power headroom.
  • the uplink quality measuring unit 6086 calculates an expected transmission power level of a physical uplink shared channel using the following formula:
  • Expected transmission power level min( P max, 10*log M+P 0 +a 1 *PL+delta — mcs+f (delta — i ))
  • Pmax the maximum transmission power level of mobile station (e.g., 24 dBm)
  • delta_mcs ( ⁇ TF (i)): a value reported via an RRC message * “i” in ⁇ TF (i) indicates an index indicating a time unit such as a subframe number.
  • delta_i a correction parameter, may be simply called “i”
  • Pmax, M, P 0 , a1, delta_mcs, delta_i, and f(*) may be provided as parameters in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • P 0 may be determined based on the information regarding uplink transmission power control obtained from the P-BCH or the D-BCH.
  • the information (P 0 ) regarding uplink transmission power control is input from the data signal decoding unit 6084 .
  • an expected transmission power level of the physical uplink shared channel is obtained using a formula.
  • an expected transmission power level of a sounding reference signal, an uplink control channel, or a random access channel may be calculated using a similar formula.
  • an expected transmission power level of a sounding reference signal, an uplink control channel, or a random access channel may be calculated by offsetting the expected transmission power level of the physical uplink shared channel.
  • An expected UE power headroom may be calculated based on the expected transmission power level of the physical uplink shared channel using the following formula:
  • expected UPHs regarding the sounding reference signal, the uplink control channel, and the random access channel may be calculated based on their expected transmission power levels as follows:
  • the expected transmission power levels and the expected UPHs described above may be represented by averages in the frequency domain and/or the time domain.
  • An average in the time domain may be calculated over an averaging period defined as a parameter. For example, an average may be calculated over an averaging period of 1 ms. Also, the average calculated over 1 ms may be filtered using the following formula to obtain a value F n :
  • the averaging period and the filtering factor “a” may be provided as parameters in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • calculated values may be averaged based on positional information of the receiving apparatus 600 .
  • the expected transmission power levels and the expected UPHs described above may be averaged over an averaging interval of 100 m, i.e., every 100-m movement of the receiving apparatus 600 .
  • a two-dimensional parameter such as 100 m 2 may be specified for the averaging interval instead of a one-dimensional parameter such as 100 m.
  • the positional information is input via the external input/output unit 110 .
  • the averaging interval based on the positional information may be provided as a parameter in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • An average in the frequency domain may be calculated, as shown in FIG. 7 , over the entire system frequency band, or over a center frequency band of 1.08 MHz located in the center of the system frequency band, i.e., including the center frequency of the system frequency band.
  • the center frequency band is composed of six resource blocks and includes the center frequency of the system frequency band.
  • the horizontal axis in FIG. 7 indicates frequency.
  • the center frequency band of 1.08 MHz is used to transmit a synchronization channel (SCH) (or a synchronization signal).
  • SCH synchronization channel
  • An average may instead be calculated over each resource block, or more flexibly, over any frequency band specified in the system frequency band. Further, as shown in FIG. 8 , an average may be calculated over each resource block group including multiple resource blocks.
  • one resource block group includes five resource blocks.
  • the horizontal axis in FIG. 8 indicates frequency.
  • the averaging interval (or range) in the frequency domain may be provided as a parameter in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • expected uplink transmission power levels or expected UPHs may be calculated for M (where M>0) resource blocks or resource block groups selected in ascending order of the path loss.
  • the value M may be provided as a parameter in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • An expected uplink throughput may be calculated as described below based on the expected uplink transmission power level, the path loss, and an interference level.
  • an expected uplink SIR at the base station 200 is calculated as follows:
  • Expected uplink SIR (expected uplink transmission power level) ⁇ (path loss) ⁇ (interference level)
  • the interference level may be provided as a parameter in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 . In either case, the interference level is a value that is normalized with respect to a bandwidth of a frequency band for which the expected uplink transmission power level is calculated.
  • an expected uplink throughput is calculated based on a look-up table as exemplified by table 1 and the expected uplink SIR.
  • Table 1 shows the correspondence between expected SIRs [dB] and throughputs [Mbps] per resource block.
  • Table 1 is used to identify a throughput per resource block.
  • a look-up table for identifying a throughput of the entire system frequency band or a throughput of a given frequency band in the system frequency band may be used.
  • the expected uplink transmission power level may be represented by an average in the time domain and/or the frequency domain.
  • the expected uplink SIR and the expected uplink throughput may be represented by averages in the time domain and/or the frequency domain.
  • the expected uplink throughput may be obtained by averaging calculated values in the time domain over the averaging period and filtering the averaged value based on the filtering factor “a”.
  • calculated values may be averaged based on positional information of the receiving apparatus 600 .
  • the expected uplink SIR and the expected uplink throughput may be obtained by averaging calculated values over an averaging interval of 100 m, i.e., every 100-m movement of the receiving apparatus 600 .
  • a two-dimensional parameter such as 100 m 2 may be specified for the averaging interval instead of a one-dimensional parameter such as 100 m.
  • the positional information is input via the external input/output unit 610 .
  • the averaging interval based on the positional information may be provided as a parameter in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • An average in the frequency domain of the expected uplink throughput may be calculated over the entire system frequency band, over a center frequency band of 1.08 MHz located in the center of the system frequency band, i.e., including the center frequency of the system frequency band, over a given frequency band in the system frequency band, over each resource block, or over each resource block group. If the expected throughput is to be calculated for each resource block or resource block group, the highest M expected throughputs of resource blocks or resource block groups may be selected.
  • the averaging period in the time domain, the filtering factor “a”, the averaging interval (or range) in the frequency domain, and the value M may be provided as parameters in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • look-up table of table 1 is just an example, and any appropriate look-up table containing different values may be used for the calculations described above.
  • the expected uplink transmission power level, the expected uplink SIR, the expected uplink throughput, and the expected UPH based on the downlink reference signal transmitted from the base station 200 may also be calculated based on a downlink reference signal transmitted from a neighboring base station. Also, if each base station covers multiple sectors, the above expected values may be calculated based on downlink reference signals transmitted from all sectors of the base station 200 and the neighboring base station. Further, the uplink quality measuring unit 6086 may be configured to calculate the expected uplink transmission power level, the expected uplink SIR, the expected uplink throughput, and the expected UPH based on reference signals from all base stations (or sectors) that the receiving apparatus 600 can receive.
  • the uplink quality measuring unit 6086 inputs the expected uplink transmission power level, the expected uplink SIR, the expected uplink throughput, and the expected UPH to the external input/output unit 610 .
  • the expected uplink transmission power level, the expected uplink SIR, the expected uplink throughput, and the expected UPH input to the external input/output unit 610 are output, for example, as graphs or numerical data to the outside (e.g., a monitor screen or a storage medium) as described later. Also, the expected uplink transmission power level, the expected uplink SIR, the expected uplink throughput, and the expected UPH may be output, for example, as graphs or numerical data to the outside (e.g., a monitor screen or a storage medium) together with the positional information of the receiving apparatus 600 .
  • the expected uplink transmission power level, the expected uplink SIR, the expected uplink throughput, and the expected UPH are output to the outside and thereby made available to a network operator (or a user, a device, or so on).
  • the receiving apparatus 600 calculates the expected uplink transmission power level, the expected uplink SIR, the expected uplink throughput, and the expected UPH based on a downlink reference signal transmitted from the base station 200 , and thereby makes it possible to evaluate uplink transmission efficiency, radio capacity, and cell coverage of the radio communication system 1000 .
  • the downlink quality measuring unit 6087 receives the channel estimate and the downlink reference signal from the downlink reference signal receiving unit 6085 . Based on the channel estimate and the downlink reference signal, the downlink quality measuring unit 6087 calculates downlink quality information (channel quality indicator) and an expected downlink throughput.
  • downlink quality information channel quality indicator
  • the downlink quality information is obtained by referring to a look-up table as shown by table 2 based on an SIR of the downlink reference signal.
  • Table 2 shows the correspondence between CQIs and SIRs [dB].
  • the SIR itself may be used as the downlink quality information.
  • the downlink quality information may be obtained by referring to a look-up table as shown by table 3.
  • Table 3 shows the correspondence between CQIs, the numbers of resource blocks (No. RB), modulation schemes, and payload sizes.
  • a CQI of a received signal having an error rate less than or equal to a predetermined value and having the largest payload size may be used as the downlink quality information.
  • the SIR described above may be represented by an average in the frequency domain and the time domain.
  • An average in the time domain may be calculated over an averaging period defined as a parameter. For example, an average may be calculated over an averaging period of 1 ms. Also, the average calculated over 1 ms may be filtered using the following formula to obtain a value F n :
  • the averaging period and the filtering factor “a” may be provided as parameters in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • calculated values may be averaged based on positional information of the receiving apparatus 600 .
  • the SIR may be obtained by averaging SIRs over an averaging interval of 100 m, i.e., every 100-m movement of the receiving apparatus 600 .
  • a two-dimensional parameter such as 100 m 2 may be specified for the averaging interval instead of a one-dimensional parameter such as 100 m.
  • the positional information is input via the external input/output unit 610 .
  • the averaging interval based on the positional information may be provided as a parameter in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • An average in the frequency domain may be calculated, as shown in FIG. 7 , over the entire system frequency band, or over a center frequency band of 1.08 MHz located in the center of the system frequency band, i.e., including the center frequency of the system frequency band.
  • the center frequency band of 1.08 MHz is used to transmit a synchronization channel (SCH).
  • An average may instead be calculated over each resource block, or more flexibly, over any frequency band specified in the system frequency band.
  • an average may be calculated over each resource block group including multiple resource blocks. In the example of FIG. 8 , one resource block group includes five resource blocks.
  • the averaging interval (or range) in the frequency domain may be provided as a parameter in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • the highest M SIRs of resource blocks or resource block groups may be selected.
  • the value M may be provided as a parameter in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • An expected downlink throughput may be calculated as described below based on the downlink quality information (channel quality indicator) calculated as described above.
  • an expected downlink throughput is calculated based on a look-up table as shown by table 4 and the downlink quality information.
  • Table 4 shows the correspondence between CQIs and throughputs [Mbps] per resource block. Table 4 is used to identify a throughput per resource block.
  • a look-up table for identifying a throughput of the entire system frequency band or a throughput of a given frequency band in the system frequency band may be used.
  • the downlink quality information may be represented by an average in the time domain and/or the frequency domain.
  • the expected downlink throughput may be represented by an average in the time domain and/or the frequency domain.
  • the expected downlink throughput may be obtained by averaging throughputs in the time domain over the averaging period and filtering the averaged throughput based on the filtering factor “a”.
  • throughputs may be averaged based on positional information of the receiving apparatus 600 .
  • the expected downlink throughput may be obtained by averaging throughputs over an averaging interval of 100 m, i.e., every 100-m movement of the receiving apparatus 600 .
  • a two-dimensional parameter such as 100 m 2 may be specified for the averaging interval instead of a one-dimensional parameter such as 100 m.
  • the positional information is input via the external input/output unit 610 .
  • the averaging interval based on the positional information may be provided as a parameter in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • An average in the frequency domain of the expected downlink throughput may be calculated over the entire system frequency band, over a center frequency band of 1.08 MHz located in the center of the system frequency band, i.e., including the center frequency of the system frequency band, over a given frequency band in the system frequency band, over each resource block, or over each resource block group. If the expected throughput is to be calculated for each resource block or resource block group, the highest M expected throughputs of resource blocks or resource block groups may be selected.
  • the averaging period in the time domain, the filtering factor “a”, the averaging interval (or range) in the frequency domain, and the value M may be provided as parameters in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • look-up tables of tables 2, 3, and 4 are just examples, and any appropriate look-up tables containing different values may be used for the calculations described above.
  • a method of calculating downlink quality information (channel quality indicator) and a downlink throughput in a case where multiple input multiple output (MIMO) is employed for downlink is described below.
  • the number of streams to be transmitted varies depending on the radio quality of the propagation environment. For example, one stream is transmitted, for example, at the edge of a cell where the radio quality is poor; and two streams are transmitted, for example, at the center of the cell where the radio quality is good.
  • the mobile station calculates an SIR or downlink quality information (channel quality indicator) and an expected throughput based on a downlink reference signal for each of the numbers of streams one and two, and reports the number of streams that provides the highest expected throughput to the base station 200 .
  • the base station 200 controls the number of streams for downlink based on the number of streams reported from the mobile station.
  • the mobile station may report, in addition to the number of streams, an optimum precoding matrix to the base station 200 .
  • the number of streams is one or two when the number of transmitting antennas and the number of receiving antennas are two. Meanwhile, the number of streams is one, two, three, or four when the number of transmitting antennas and the number of receiving antennas are four.
  • the downlink quality measuring unit 6087 may be configured to calculate the number of streams (rank) in addition to downlink quality information and an expected throughput. That is, when MIMO is employed, the downlink quality measuring unit 6087 may be configured to calculate downlink quality information, an expected throughput, and the number of streams (rank).
  • the downlink quality measuring unit 6087 may be configured to calculate the downlink quality information (channel quality indicator), the expected downlink throughput, and the number of streams (when MIMO is employed) based on reference signals from all base stations (or sectors) that the receiving apparatus 600 can receive.
  • the downlink quality measuring unit 6087 inputs the downlink quality information (channel quality indicator), the expected downlink throughput, and the number of streams (when MIMO is employed) to the external input/output unit 610 .
  • the downlink quality information (channel quality indicator), the expected downlink throughput, and the number of streams (when MIMO is employed) input to the external input/output unit 610 are output, for example, as graphs or numerical data to the outside (e.g., a monitor screen or a storage medium) as described later.
  • the downlink quality information (channel quality indicator), the expected downlink throughput, and the number of streams (when MIMO is employed) may be output, for example, as graphs or numerical data to the outside (e.g., a monitor screen or a storage medium) together with the positional information of the receiving apparatus 600 .
  • the downlink quality information (channel quality indicator) (i.e., radio quality of a downlink reference signal in a cell), the expected downlink throughput (i.e., expected throughput of a downlink shared channel), and the number of streams (when MIMO is employed) are output to the outside and thereby made available to a network operator (or a user, a device, or so on).
  • the receiving apparatus 600 calculates the downlink quality information (channel quality indicator), the expected downlink throughput, and the number of streams (when MIMO is employed) based on a downlink reference signal transmitted from the base station 200 , and thereby makes it possible to evaluate downlink transmission efficiency and radio capacity of the radio communication system 1000 .
  • the delay profile measuring unit 6088 receives the channel estimate and the downlink reference signal from the downlink reference signal receiving unit 6085 .
  • the delay profile measuring unit 6088 calculates a downlink delay profile based on the received downlink reference signal. For example, the delay profile measuring unit 6088 calculates a delay profile by performing IFFT processing on an FFT-processed reference signal (channel estimate).
  • the delay profile measuring unit 6088 may be configured to calculate a delay profile based on time correlation between a downlink received signal before FFT processing and an IFFT-processed transmission sequence of a known reference signal.
  • a copy of a downlink received signal (before FFT processing) is input from the analog-to-digital conversion unit (A/D) 6080 to the delay profile measuring unit 6088 .
  • the delay profile may be represented by an average calculated over an averaging period.
  • the averaging period may be provided as a parameter in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • delay profiles may be averaged based on positional information of the receiving apparatus 600 .
  • delay profiles may be averaged over an averaging interval of 100 m, i.e., every 100-m movement of the receiving apparatus 600 .
  • a two-dimensional parameter such as 100 m 2 may be specified for the averaging interval instead of a one-dimensional parameter such as 100 m.
  • the positional information is input via the external input/output unit 610 .
  • the averaging interval based on the positional information may be provided as a parameter in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • the delay profile measuring unit 6088 calculates an expected (estimated) CP length.
  • the delay profile measuring unit 6088 selects paths with reception levels greater than or equal to a predetermined threshold from the paths constituting the delay profile, and calculates an expected CP length based on the time difference between the earliest-arriving path and the latest-arriving path in the selected paths.
  • CP short cyclic prefix
  • CP long cyclic prefix
  • the delay profile measuring unit 6088 determines that the long CP is optimum if the time difference between the earliest-arriving path and the latest-arriving path is greater than or equal to 4.6875 ⁇ s, and determines that the short CP is optimum if the time difference is less than 4.6875 ⁇ s.
  • the delay profile measuring unit 6088 may be configured to output the time difference between the earliest-arriving path and the latest-arriving path as an estimated propagation path delay.
  • a user of a communication area evaluation tool according to an embodiment of the present invention can easily determine whether the short CP or the long CP is optimum based on the estimated propagation path delay.
  • the delay profile measuring unit 6088 may be configured to define an FFT timing with respect to a path with the highest reception level and to calculate an expected CP length based on a ratio of the reception level in a window defined by the FFT timing and the short CP length to the reception level outside of the window. For example, the delay profile measuring unit 6088 may determine that the short CP is optimum if the ratio of the reception level in the window to the reception level outside of the window is greater than or equal to 10, and determines that the long CP is optimum if the ratio is less than 10.
  • the threshold for selecting paths and the ratio of the reception level in the window to the reception level outside of the window for determining the CP length may be provided as parameters in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • the threshold may be represented by an absolute value or a relative value.
  • the relative value may be indicated by a ratio of the received to the highest reception level.
  • the expected CP length or the estimated propagation path delay input to the external input/output unit 610 are output, for example, as graphs or numerical data to the outside (e.g., a monitor screen or a storage medium) as described later. Also, the expected CP length or the estimated propagation path delay may be output, for example, as graphs or numerical data to the outside (e.g., a monitor screen or a storage medium) together with the positional information of the receiving apparatus 600 . Thus, the expected CP length or the estimated propagation path delay is output to the outside to allow a network operator (or a user, a device, or so on) to determine whether the CP length in the cell is appropriately set and to optimize parameters related to common channels such as the CP length for the cell 50 .
  • a network operator or a user, a device, or so on
  • the reference signal measuring unit 6089 receives the channel estimate and the downlink reference signal from the downlink reference signal receiving unit 6085 . Based on the channel estimate and the downlink reference signal, the reference signal measuring unit 6089 calculates a received power level of the downlink reference signal (reference signal received power (RSRP)), a downlink received carrier power level (E-UTRA carrier received signal strength indicator (RSSI)) (may also be called downlink received power level), a value obtained by dividing the received power level of the downlink reference signal by the downlink received carrier power level (RSRP/RSSI), and a path loss. The value RSRP/RSSI may also be called reference signal received quality (RSRQ).
  • RSRP reference signal received power
  • the downlink received carrier power level is a sum of received power levels of all signals from the serving cell, i.e., the base station 200 , received power levels of signals from all base stations in neighboring cells, received power levels of interference signals from neighboring frequencies, a thermal noise power level, and so on. See, for example, 3GPP TS36.214, v 1.0.0, 2007-05, for definitions of the reference signal received power (RSRP) and the E-UTRA carrier received signal strength indicator (RSSI).
  • RSRP reference signal received power
  • RSSI E-UTRA carrier received signal strength indicator
  • the path loss is calculated based on the received power level of the downlink reference signal and the transmission power level of the downlink reference signal at the base station 200 as follows:
  • Path loss [dB] (transmission power level of downlink reference signal) ⁇ (received power level of downlink reference signal)
  • the transmission power level of the downlink reference signal may be provided as a parameter in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 . Also, the transmission power level of the downlink reference signal may be determined based on the information regarding the transmission power level of the downlink reference signal obtained from the P-BCH or the D-BCH. The information regarding the transmission power level of the downlink reference signal obtained from the P-BCH or the D-BCH is input from the data signal decoding unit 6084 .
  • the reception power level of the downlink reference signal and the downlink received carrier power level may be measured in one of the following three methods:
  • the same method or different methods may be used for measuring the reception power level of the downlink reference signal and the downlink received carrier power level.
  • the value RSRP/RSSI is obtained by dividing the received power level of the downlink reference signal by the downlink received carrier power level measured in one of the above three methods.
  • the path loss is calculated based on the received power level of the downlink reference signal calculated in one of the above three methods.
  • the three methods may be provided as parameters in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • the received power level of the downlink reference signal, the downlink received carrier power level, the value RSRP/RSSI, and the path loss may be represented by averages in the frequency domain and/or the time domain.
  • An average in the time domain may be calculated over an averaging period defined as a parameter. For example, an average may be calculated over an averaging period of 200 ms. Also, the average calculated over 200 ms may be filtered using the following formula to obtain a value F n :
  • the averaging period and the filtering factor “a” may be provided as parameters in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • calculated values may be averaged based on positional information of the receiving apparatus 600 .
  • the received power level of the downlink reference signal, the downlink received carrier power level, the value RSRP/RSSI, and the path loss may be obtained by averaging calculated values over an averaging interval of 100 m, i.e., every 100-m movement of the receiving apparatus 600 .
  • a two-dimensional parameter such as 100 m 2 may be specified for the averaging interval instead of a one-dimensional parameter such as 100 m.
  • the positional information is input via the external input/output unit 610 .
  • the averaging interval based on the positional information may be provided as a parameter in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • An average in the frequency domain may be calculated, as shown in FIG. 7 , over the entire system frequency band, or over a center frequency band of 1.08 MHz located in the center of the system frequency band, i.e., including the center frequency of the system frequency band.
  • the center frequency band of 1.08 MHz is used to transmit a synchronization channel (SCH).
  • An average may instead be calculated over each resource block, or more flexibly, over any frequency band specified in the system frequency band.
  • an average may be calculated over each resource block group including multiple resource blocks. In the example of FIG. 8 , one resource block group includes five resource blocks. Also, instead of an average, a sum of calculated values in a frequency domain may be used.
  • the averaging interval (or range) in the frequency domain may be provided as a parameter in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 . Also, a parameter indicating whether to use an average or a sum may be provided in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • the reference signal measuring unit 6089 may be configured to calculate the received power level of the downlink reference signal, the downlink received carrier power level, the value RSRP/RSSI, and the path loss based on reference signals from all base stations (or sectors) that the receiving apparatus 600 can receive.
  • the reference signal measuring unit 6089 inputs the received power level of the downlink reference signal, the downlink received carrier power level, the value RSRP/RSSI, and the path loss to the external input/output unit 610 .
  • the received power level of the downlink reference signal, the downlink received carrier power level, the value RSRP/RSSI, and the path loss input to the external input/output unit 610 are output, for example, as graphs or numerical data to the outside (e.g., a monitor screen or a storage medium) as described later. Also, the received power level of the downlink reference signal, the downlink received carrier power level, the value RSRP/RSSI, and the path loss may be output, for example, as graphs or numerical data to the outside (e.g., a monitor screen or a storage medium) together with the positional information of the receiving apparatus 600 .
  • the received power level of the downlink reference signal, the downlink received carrier power level, the value RSRP/RSSI, and the path loss are output to the outside to allow a network operator (or a user, a device, or so on) to determine the radio quality of a downlink reference signal in a cell.
  • the received power level of the downlink reference signal, the downlink received carrier power level, the value RSRP/RSSI, and the path loss are used for mobile control such as handover and cell reselection.
  • the receiving apparatus 600 calculates the received power level of the downlink reference signal, the downlink received carrier power level, the value RSRP/RSSI, and the path loss for all base stations from which the receiving apparatus 600 can receive signals, and thereby makes it possible to evaluate mobile control characteristics of the radio communication system 1000 .
  • the error rate obtaining unit 6090 receives the decoding results of the P-BCH, the D-BCH, the downlink scheduling information for the D-BCH, the PI, and the PCH from the data signal decoding unit 6084 , and calculates their error rates.
  • a measuring period for calculating the error rates is received from the external input/output unit 610 . For example, if the measuring period received from the external input/output unit 610 indicates one second, the error rate obtaining unit 6090 calculates error rates of the P-BCH, the D-BCH, the downlink scheduling information for the D-BCH, the PI, and the PCH every one second. After calculations, the error rate obtaining unit 6090 inputs the error rates of the P-BCH, the D-BCH, the downlink scheduling information for the D-BCH, the PI, and the PCH to the external input/output unit 610 .
  • error rates may be calculated every measuring interval based on positional information of the receiving apparatus 600 .
  • the error rates of the P-BCH, the D-BCH, the downlink scheduling information for the D-BCH, the PI, and the PCH may be calculated every measuring interval of 100 m, i.e., every 100-m movement of the receiving apparatus 600 .
  • a two-dimensional parameter such as 100 m 2 may be specified for the measuring interval instead of a one-dimensional parameter such as 100 m.
  • the positional information is input via the external input/output unit 110 .
  • the measuring interval based on the positional information may be provided as a parameter in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • the error rates of the P-BCH, the D-BCH, the downlink scheduling information for the D-BCH, the PI, and the PCH input to the external input/output unit 610 are output, for example, as graphs or numerical data to the outside (e.g., a monitor screen or a storage medium) as described later. Also, the error rates of the P-BCH, the D-BCH, the downlink scheduling information for the D-BCH, the PI, and the PCH may be output, for example, as graphs or numerical data to the outside (e.g., a monitor screen or a storage medium) together with the positional information of the receiving apparatus 600 .
  • the error rates of the P-BCH, the D-BCH, the downlink scheduling information for the D-BCH, the PI, and the PCH are output to the outside to allow a network operator (or a user, a device, or so on) to determine whether the quality of the common channels is appropriately maintained and to optimize parameters related to the common channels such as the transmission power and the number of resource elements allocated to the common channels.
  • a network operator or a user, a device, or so on
  • parameters related to the common channels such as the transmission power and the number of resource elements allocated to the common channels.
  • the number of resource elements the number of resource blocks, the number of subcarriers, or the number of OFDM symbols may be optimized based on the error rates.
  • reception processing of a downlink signal transmitted from the base station 200 is mainly discussed.
  • the receiving apparatus 600 can also perform similar reception processing for a downlink signal transmitted from a neighboring base station.
  • the external input/output unit 610 outputs calculated (measured) values received from the uplink quality measuring unit 6086 , the downlink quality measuring unit 6087 , the delay profile measuring unit 6088 , the reference signal measuring unit 6089 , and the error rate obtaining unit 6090 of the baseband signal processing unit 608 to external interfaces.
  • the external input/output unit 610 displays the calculated values as numerical data and/or graphs on a monitor screen or stores the calculated values as numerical data in a storage medium such as a memory or a hard disk.
  • the external input/output unit 610 may obtain positional information of the receiving apparatus 600 and output calculated (measured) values received from the uplink quality measuring unit 6086 , the downlink quality measuring unit 6087 , the delay profile measuring unit 6088 , the reference signal measuring unit 6089 , and the error rate obtaining unit 6090 to an external interface (e.g., a monitor screen or a storage medium) together with the positional information.
  • the positional information may be obtained, for example, from a positional information obtaining device such as a GPS 700 connected to the external input/output unit 610 .
  • the calculated values from the uplink quality measuring unit 6086 , the downlink quality measuring unit 6087 , the delay profile measuring unit 6088 , the reference signal measuring unit 6089 , and the error rate obtaining unit 6090 may be represented by averages in the time domain or averages calculated based on the positional information.
  • the positional information is obtained by the GPS 700 and input via the external input/output unit 610 to the respective units.
  • the external input/output unit 610 may also be configured to store parameters used by the uplink quality measuring unit 6086 , the downlink quality measuring unit 6087 , the delay profile measuring unit 6088 , the reference signal measuring unit 6089 , and the error rate obtaining unit 6090 , and to input the parameters to the corresponding units.
  • the parameters may be stored as internal parameters of the receiving apparatus 600 or may be input from an external interface. Details of the parameters are given in the above descriptions.
  • FIGS. 12 and 13 data obtaining processes (methods) performed by the receiving apparatus 600 of this embodiment are described with reference to FIGS. 12 and 13 .
  • a data obtaining process is described with reference to FIG. 12 and another data obtaining process where calculated values are averaged based on positional information is described with reference to FIG. 13 .
  • the receiving apparatus 600 receives a downlink reference signal transmitted from the base station 200 (step S 1202 ).
  • the receiving apparatus 600 calculates at least one of uplink quality, downlink quality, a delay profile, a reference signal measurement, and an error rate (step S 1204 ).
  • the uplink quality measuring unit 6086 , the downlink quality measuring unit 6087 , the delay profile measuring unit 6088 , the reference signal measuring unit 6089 , and the error rate obtaining unit 6090 of the baseband signal processing unit 608 may retain parameters and calculate expected values based on the parameters and the downlink reference signal.
  • the receiving apparatus 600 outputs at least one of the uplink quality, the downlink quality, the delay profile, the reference signal measurement, and the error rate calculated in step S 1204 to an external interface such as a monitor screen or a storage medium (step S 1206 ).
  • the expected values may be represented by averages in the time domain.
  • a data obtaining process where calculated values are averaged based on positional information is described below with reference to FIG. 13 .
  • the receiving apparatus 600 receives a downlink reference signal transmitted from the base station 200 (step S 1302 ).
  • the receiving apparatus 600 calculates at least one of uplink quality, downlink quality, a delay profile, a reference signal measurement, and an error rate (step S 1304 ).
  • the uplink quality measuring unit 6086 , the downlink quality measuring unit 6087 , the delay profile measuring unit 6088 , the reference signal measuring unit 6089 , and the error rate obtaining unit 6090 of the baseband signal processing unit 608 may retain parameters and calculate expected values based on the parameters and the downlink reference signal.
  • Positional information obtained by the GPS 700 is input via the external input/output unit 610 to the uplink quality measuring unit 6086 , the downlink quality measuring unit 6087 , the delay profile measuring unit 6088 , the reference signal measuring unit 6089 , and the error rate obtaining unit 6090 .
  • the uplink quality measuring unit 6086 , the downlink quality measuring unit 6087 , the delay profile measuring unit 6088 , the reference signal measuring unit 6089 , and/or the error rate obtaining unit 6090 output the calculated values together with the positional information (step S 1306 ).
  • the receiving apparatus 600 outputs at least one of the uplink quality, the downlink quality, the delay profile, the reference signal measurement, and the error rate calculated in step S 1304 together with the positional information to an external interface such as a monitor screen or a storage medium (step S 1308 ).
  • FIGS. 14 and 15 Other data obtaining processes (methods) performed by the receiving apparatus 600 of this embodiment are described with reference to FIGS. 14 and 15 .
  • the receiving apparatus 600 communicates with the base station 200 and measures a throughput based on downlink scheduling information or an uplink scheduling grant.
  • a data obtaining process is described with reference to FIG. 14
  • another data obtaining process where calculated values are averaged based on positional information is described with reference to FIG. 15 .
  • the receiving apparatus 600 communicates with the base station 200 (step S 1402 ).
  • the receiving apparatus 600 receives downlink scheduling information or an uplink scheduling grant transmitted from the base station 200 (step S 1404 ).
  • the receiving apparatus 600 calculates at least one of a downlink throughput and an uplink throughput (step S 1406 ).
  • the receiving apparatus 600 outputs at least one of the downlink throughput and the uplink throughput calculated in step S 1406 to an external interface such as a monitor screen or a storage medium (step S 1408 ).
  • the downlink throughput and the uplink throughput may be represented by averages in the time domain.
  • a data obtaining process where calculated values are averaged based on positional information is described below with reference to FIG. 15 .
  • the receiving apparatus 600 communicates with the base station 200 (step S 1502 ).
  • the receiving apparatus 600 receives downlink scheduling information or an uplink scheduling grant transmitted from the base station 200 (step S 1504 ).
  • the receiving apparatus 600 calculates at least one of a downlink throughput and an uplink throughput (step S 1506 ).
  • Positional information obtained by the GPS 700 is input via the external input/output unit 610 to the uplink quality measuring unit 6086 , the downlink quality measuring unit 6087 , the delay profile measuring unit 6088 , the reference signal measuring unit 6089 , and the error rate obtaining unit 6090 .
  • the uplink quality measuring unit 6086 , the downlink quality measuring unit 6087 , the delay profile measuring unit 6088 , the reference signal measuring unit 6089 , and/or the error rate obtaining unit 6090 output calculated values together with the positional information (step S 1508 ).
  • the receiving apparatus 600 outputs at least one of the downlink throughput and the uplink throughput calculated in step S 1506 together with the positional information to an external interface such as a monitor screen or a storage medium (step S 1510 ).
  • This embodiment makes it possible to obtain values such as an expected downlink throughput and an expected uplink throughput to be used by a network operator for cell design, and thereby makes it possible to construct a high-quality, highly-efficient network.
  • a receiving apparatus for communication area evaluation according to another embodiment of the present invention is described below.
  • a network where multiple base stations perform downlink transmission in synchronization with each other (hereafter, such base stations may be called “downlink-transmission-synchronized base stations”) is called a single frequency network (SFN) or a multicast/broadcast over single frequency network (MBSFN).
  • SFN single frequency network
  • MBSFN multicast/broadcast over single frequency network
  • the mobile station when, for example, the same signal is transmitted from multiple downlink-transmission-synchronized base stations, the mobile station can comparatively easily combine multiple instances of the signal transmitted from the base stations. This in turn makes it possible to improve the transmission efficiency and the transmission rate.
  • This technology is particularly effective in multicast and broadcast transmission where a common signal is transmitted from base stations to an unspecified number of mobile stations.
  • a radio communication system 1000 including a receiving apparatus 600 and base stations 200 of this embodiment is described below with reference to FIG. 16 .
  • the radio communication system 1000 is based on, for example, Evolved UTRA and UTRAN.
  • the radio communication system 1000 includes the base stations 200 m ( 200 1 , 200 2 , 200 3 , 200 4 , 200 5 , 200 6 , 200 7 , . . . , 200 m ; where m is an integer greater than 0), mobile stations 100 n (100 1 , 100 2 , 100 3 . . . 100 n ; where n is an integer greater than 0), and the receiving apparatus 600 located in one of cells 50 1 ( 50 1 , 50 2 , 50 3 , . . . , 50 1 ; where 1 is an integer greater than 0) that are areas where mobile communication services are provided by the base stations 200 m .
  • each of the base stations 200 m may have two or more sectors.
  • the receiving apparatus 600 may or may not be communicating with the base stations 200 m based on Evolved UTRA and UTRAN.
  • the receiving apparatus 600 communicates with the base stations 200 m based on Evolved UTRA and UTRAN, communication processing similar to that performed between the mobile stations 100 n and the base stations 200 m is performed between the receiving apparatus 600 and the base stations 200 m .
  • the receiving apparatus 600 of this embodiment has substantially the same configuration as that of the first embodiment except the configuration of the baseband signal processing unit 108 . Therefore, the baseband signal processing unit 108 of this embodiment is mainly described below.
  • the baseband signal processing unit 108 of the receiving apparatus 600 of this embodiment includes an analog-to-digital conversion unit (A/D) 6080 , a CP removing unit 6081 , a fast Fourier transform unit (FFT) 6082 , a demultiplexing unit (DeMUX) 6083 , a data signal decoding unit 6084 , a downlink reference signal receiving unit 6085 , a downlink quality measuring unit 6087 , a delay profile measuring unit 6088 , a reference signal measuring unit 6089 , and an error rate obtaining unit 6090 .
  • A/D analog-to-digital conversion unit
  • FFT fast Fourier transform unit
  • DeMUX demultiplexing unit
  • A/D analog-to-digital conversion unit
  • CP removing unit 6081 the fast Fourier transform unit
  • DeMUX demultiplexing unit
  • the second embodiment unlike the first embodiment where a downlink signal transmitted from one base station is input from the transceiver unit 606 , a downlink signal input from the transceiver unit 606 includes signals transmitted from multiple downlink-transmission-synchronized base stations.
  • the receiving apparatus 600 cannot identify base stations transmitting signals included in the downlink signal.
  • the data signal decoding unit 6084 receives a channel estimate from the downlink reference signal receiving unit 6085 , and applies channel compensation based on the channel estimate to a downlink data signal transmitted from multiple downlink-transmission-synchronized base stations to decode the data signal.
  • the data signal indicates a common channel signal transmitted from the downlink-transmission-synchronized base stations.
  • the common channel signal for example, includes common channels such as a P-BCH, a D-BCH, a broadcast channel, and a multicast channel.
  • the data signal decoding unit 6084 reports the decoding results to the error rate obtaining unit 6090 .
  • the data signal decoding unit 6084 obtains information in the P-BCH and the D-BCH, and inputs the obtained information to relevant components of the receiving apparatus 600 as needed. For example, the data signal decoding unit 6084 obtains information regarding the transmission power level of a downlink reference signal from the P-BCH or the D-BCH, and inputs the obtained information to the reference signal measuring unit 6089 .
  • the downlink reference signal receiving unit 6085 performs channel estimation based on the downlink reference signal and determines channel compensation to be applied to the received data signal. In other words, the downlink reference signal receiving unit 6085 calculates a channel estimate.
  • the downlink reference signal receiving unit 6085 inputs the calculated channel estimate to the data signal decoding unit 6084 .
  • the downlink reference signal receiving unit 6085 also inputs the downlink reference signal and the channel estimate to the downlink quality measuring unit 6087 , the delay profile measuring unit 6088 , the reference signal measuring unit 6089 , and the error rate obtaining unit 6090 .
  • the downlink reference signal is transmitted from the multiple downlink-transmission-synchronized base stations.
  • the functions of the downlink quality measuring unit 6087 , the delay profile measuring unit 6088 , and the reference signal measuring unit 6089 are substantially the same as those of the first embodiment, and therefore descriptions of those functions are omitted here.
  • the downlink reference signal input from the downlink reference signal receiving unit 6085 is transmitted from multiple downlink-transmission-synchronized base stations.
  • the error rate obtaining unit 6090 receives decoding results of the P-BCH, the D-BCH, the multicast channel, and the broadcast channel from the data signal decoding unit 6084 , and calculates their error rates.
  • a measuring period for calculating the error rates is received from the external input/output unit 610 . For example, if the measuring period received from the external input/output unit 610 indicates one second, the error rate obtaining unit 6090 calculates error rates of the P-BCH, the D-BCH, the multicast channel, and the broadcast channel every one second. After calculations, the error rate obtaining unit 6090 inputs the error rates of the P-BCH, the D-BCH, the multicast channel, and the broadcast channel to the external input/output unit 610 .
  • error rates may be calculated every measuring interval based on positional information of the receiving apparatus 600 .
  • the error rates of the P-BCH, the D-BCH, the multicast channel, and the broadcast channel may be calculated every measuring interval of 100 m, i.e., every 100-m movement of the receiving apparatus 600 .
  • a two-dimensional parameter such as 100 m 2 may be specified for the measuring interval instead of a one-dimensional parameter such as 100 m.
  • the positional information is input via the external input/output unit 610 .
  • the measuring interval based on the positional information may be provided as a parameter in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • the error rates of the P-BCH, the D-BCH, the multicast channel, and the broadcast channel input to the external input/output unit 610 are output, for example, as graphs or numerical data to the outside (e.g., a monitor screen or a storage medium). Also, the error rates of the P-BCH, the D-BCH, the multicast channel, and the broadcast channel may be output, for example, as graphs or numerical data to the outside (e.g., a monitor screen or a storage medium) together with the positional information of the receiving apparatus 600 .
  • the error rates of the P-BCH, the D-BCH, the multicast channel, and the broadcast channel are output to the outside to allow a network operator (or a user, a device, or so on) to determine whether the quality of the common channels is appropriately maintained and to optimize parameters related to the common channels such as the transmission power and the number of resource elements allocated to the common channels.
  • a network operator or a user, a device, or so on
  • parameters related to the common channels such as the transmission power and the number of resource elements allocated to the common channels.
  • the number of resource elements the number of resource blocks, the number of subcarriers, or the number of OFDM symbols may be optimized based on the error rates.
  • the receiving apparatus 600 receives a downlink reference signal, performs various measurements and calculations, and outputs the results to an external interface.
  • the receiving apparatus 600 of the first embodiment it is difficult to accurately calculate the received SIR of an uplink signal at the base station 200 and therefore it is difficult to accurately calculate an expected uplink throughput. Also, since the receiving apparatus 600 of the first embodiment is not informed of the operations of a scheduler (MAC processing unit) of the base station 200 , the expected downlink throughput calculated by the receiving apparatus 600 may not always match the actual downlink throughput.
  • MAC processing unit MAC processing unit
  • the receiving apparatus 600 establishes a connection with the base station 200 and performs uplink and downlink communications with the base station 200 .
  • This configuration makes it possible to accurately calculate an expected uplink throughput and an expected downlink throughput. More particularly, the receiving apparatus 600 of this embodiment receives the uplink scheduling grant and the downlink scheduling information from the base station 200 and calculates an expected uplink throughput and an expected downlink throughput based on the received uplink scheduling grant and downlink scheduling information.
  • the uplink scheduling grant for example, includes information regarding an uplink shared channel such as uplink resource allocation information, a UE ID(s), a data size(s), a modulation scheme(s), uplink transmission power information, and information regarding a demodulation reference signal used in uplink MIMO.
  • Receiving the uplink scheduling grant makes it possible to calculate an expected uplink throughput based on the uplink resource allocation information and the data size.
  • the downlink scheduling information includes information regarding a downlink shared channel such as downlink resource block allocation information, a UE ID(s), the number of streams, information regarding a precoding vector(s), a data size(s), a modulation scheme(s), and information regarding hybrid automatic repeat request (HARQ).
  • a downlink shared channel such as downlink resource block allocation information, a UE ID(s), the number of streams, information regarding a precoding vector(s), a data size(s), a modulation scheme(s), and information regarding hybrid automatic repeat request (HARQ).
  • HARQ hybrid automatic repeat request
  • the base station 200 of this embodiment has substantially the same configuration as that of the first embodiment, and therefore its descriptions are omitted here.
  • a receiving apparatus 600 of this embodiment is described below with reference to FIG. 18 .
  • the receiving apparatus 600 of this embodiment establishes a connection and communicates with the base station 200 , and thereby calculates and outputs uplink and downlink communication quality. This feature of the receiving apparatus 600 is mainly discussed below.
  • the receiving apparatus 600 of this embodiment includes an antenna 602 , an amplifier 604 , a transceiver unit 606 , a baseband signal processing unit 608 , an external input/output unit 610 , a call processing unit 612 , and an application unit 614 .
  • the antenna 602 , the amplifier 604 , and the transceiver unit 606 of this embodiment have substantially the same configurations and functions as those of the first embodiment, and therefore their descriptions are omitted here.
  • a configuration of the baseband signal processing unit 608 of this embodiment is described below with reference to FIG. 19 .
  • the baseband signal processing unit 608 includes an analog-to-digital conversion unit (A/D) 6080 , a CP removing unit 6081 , an FFT 6082 , a DeMUX 6083 , a data signal decoding unit 6084 , a downlink reference signal receiving unit 6085 , an uplink quality measuring unit 6086 , a downlink quality measuring unit 6087 , a reference signal measuring unit 6089 , a MAC processing unit 6091 , an RLC processing unit 6092 , a signal generating unit 6093 , and a transmission processing unit 6094 .
  • A/D analog-to-digital conversion unit
  • the analog-to-digital conversion unit (A/D) 6080 converts an analog baseband signal input from the transceiver unit 606 into a digital signal and inputs the digital signal to the CP removing unit 6081 .
  • the CP removing unit 6081 removes CPs from received symbols and inputs remaining effective symbols to the FFT 6082 .
  • the fast Fourier transform unit (FFT) 6082 fast-Fourier-transforms the input signal and thereby OFDM-demodulates the signal, and inputs the demodulated signal to the DeMUX 6083 .
  • the demultiplexing unit (DeMUX) 6083 separates a downlink reference signal, a broadcast channel signal, a downlink control channel signal, and a downlink shared channel signal from the demodulated signal, inputs the downlink reference signal to the downlink reference signal receiving unit 6085 , and inputs the broadcast channel signal, the downlink control channel signal, and the downlink shared channel signal to the data signal decoding unit 6084 .
  • the downlink reference signal receiving unit 6085 performs channel estimation based on the downlink reference signal and determines channel compensation to be applied to a received downlink data signal. In other words, the downlink reference signal receiving unit 6085 calculates a channel estimate.
  • the downlink reference signal receiving unit 6085 inputs the calculated channel estimate to the data signal decoding unit 6084 .
  • the downlink reference signal receiving unit 6085 also inputs the downlink reference signal and the channel estimate to the uplink quality measuring unit 6086 , the downlink quality measuring unit 6087 , and the reference signal measuring unit 6089 .
  • the data signal decoding unit 6084 receives the channel estimate from the downlink reference signal receiving unit 6085 , and applies channel compensation based on the channel estimate to the downlink data signal received from the base station 200 to decode the downlink data signal.
  • the data signal includes the broadcast channel signal, the downlink control channel signal, and the downlink shared channel signal transmitted from the base station 200 .
  • the broadcast channel signal includes broadcast channels such as the P-BCH and the D-BCH.
  • the downlink control channel signal includes downlink control channels such as the downlink scheduling information, the uplink scheduling grant, and acknowledgement information for an uplink shared channel.
  • the data signal decoding unit 6084 reports the decoding results to the uplink quality measuring unit 6086 , the downlink quality measuring unit 6087 , and the MAC processing unit 6091 .
  • the data signal decoding unit 6084 obtains information from the P-BCH and the D-BCH, and inputs the obtained information to relevant components of the receiving apparatus 600 as needed.
  • the data signal decoding unit 6084 may obtain information regarding the transmission power level of the downlink reference signal from the P-BCH or the D-BCH, and input the obtained information to the uplink quality measuring unit 6086 and the reference signal measuring unit 6089 .
  • the data signal decoding unit 6084 may obtain information (P 0 ) regarding uplink transmission power control from the P-BCH or the D-BCH, and input the obtained information to the uplink quality measuring unit 6086 .
  • the uplink quality measuring unit 6086 receives the channel estimate and the downlink reference signal from the downlink reference signal receiving unit 6085 , and receives the decoding results of the downlink data signal from the data signal decoding unit 6084 .
  • the uplink quality measuring unit 6086 calculates an expected uplink throughput based on the uplink resource allocation information and the data size obtained from the uplink scheduling grant in the data signal.
  • the uplink resource allocation information indicates frequency resource allocation information.
  • the uplink quality measuring unit 6086 calculates an expected throughput per resource block as follows:
  • the expected uplink throughput may be represented by an average in the time domain and/or the frequency domain. Also, the expected uplink throughput may be represented by an average calculated based on positional information.
  • an expected throughput may be calculated based on resource allocation information in the frequency domain and/or the time domain. For example, an expected throughput may be calculated based on the frequency (or the rate) at which the uplink scheduling grant is actually transmitted and an actually-allocated transmission band, or based on an assumption that all frequency and time resources are allocated to the receiving apparatus 600 . Further, an expected throughput may be calculated based on hypothetical frequency and time resources (allocation frequency) input from the outside via the external input/output unit 610 .
  • the receiving apparatus 600 is in communication with the base station 200 . Therefore, the uplink quality measuring unit 6086 may set “delta_mcs” in the above formula for calculating the expected uplink transmission power level at a value reported via an RRC message. Also in the formula, “delta_i” may be set at a value reported via the uplink scheduling grant.
  • the downlink quality measuring unit 6087 receives the channel estimate and the downlink reference signal from the downlink reference signal receiving unit 6085 , and receives the decoding results of the downlink data signal from the data signal decoding unit 6084 .
  • the downlink quality measuring unit 6087 calculates an expected downlink throughput based on the downlink resource block allocation information, the data size, and the number of streams obtained from the downlink scheduling information in the data signal. For example, the downlink quality measuring unit 6087 calculates an expected throughput per resource block as follows:
  • the expected downlink throughput may be represented by an average in the time domain and/or the frequency domain. Also, the expected downlink throughput may be represented by an average calculated based on positional information.
  • an expected throughput may be calculated based on resource allocation information in the frequency domain and/or the time domain. For example, an expected throughput may be calculated based on the frequency (or the rate) at which the downlink scheduling information is actually transmitted and an actually-allocated transmission band, or based on an assumption that all frequency and time resources are allocated to the receiving apparatus 600 . Further, an expected throughput may be calculated based on hypothetical frequency and time resources (allocation frequency) input from the outside via the external input/output unit 610 .
  • the reference signal measuring unit 6089 of this embodiment is substantially the same as that of the first embodiment except the difference as described below.
  • the reference signal measuring unit 6089 calculates a received power level of the downlink reference signal (reference signal received power (RSRP)), a downlink received carrier power level (E-UTRA carrier received signal strength indicator (RSSI)), a value obtained by dividing the received power level of the downlink reference signal by the downlink received carrier power level (RSRP/RSSI), and a path loss, and inputs the calculated values to the call processing unit 612 .
  • RSRP reference signal received power
  • RSRP/RSSI downlink received carrier power level
  • the MAC processing unit 6091 receives the downlink scheduling information, the uplink scheduling grant, the acknowledgement information for an uplink shared channel, and the downlink shared channel from the data signal decoding unit 6084 .
  • the MAC processing unit 6091 based on the uplink scheduling grant, performs transmission processing such as transport format determination and MAC-layer retransmission control (HARQ) for the uplink user data. Specifically, if transmission using an uplink shared channel is requested by the uplink scheduling grant received from the base station 200 via the data signal decoding unit 6084 , the MAC processing unit 6091 performs transmission processing such as transport format determination and retransmission control (HARQ) for packet data in a data buffer of the receiving apparatus 600 , and inputs the packet data to the signal generating unit 6093 .
  • HARQ transport format determination and retransmission control
  • the MAC processing unit 6091 performs, for example, reception processing in MAC-layer retransmission control for downlink packet data based on the downlink scheduling information from the data signal decoding unit 6084 .
  • the MAC processing unit 6091 may be configured to measure uplink and downlink MAC layer throughputs and to input the measured throughputs to the external input/output unit 610 .
  • the MAC layer throughputs may be represented by averages in the time domain.
  • An average in the time domain may be calculated over an averaging period defined as a parameter. For example, an average may be calculated over an averaging period of 1 s. Also, the average calculated over 1 s may be filtered using the following formula to obtain a value F n :
  • the averaging period and the filtering factor “a” may be provided as parameters in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • throughputs may be averaged based on positional information of the receiving apparatus 600 .
  • MAC layer throughputs may be averaged over an averaging interval of 100 m, i.e., every 100-m movement of the receiving apparatus 600 .
  • a two-dimensional parameter such as 100 m 2 may be specified for the averaging interval instead of a one-dimensional parameter such as 100 m.
  • the positional information is input via the external input/output unit 610 .
  • the averaging interval based on the positional information may be provided as a parameter in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • the MAC processing unit 6091 may be configured to calculate a MAC layer throughput based on resource allocation information in the frequency domain and/or the time domain. That is, the MAC processing unit 6091 may calculate an actual MAC layer throughput or calculate a MAC layer throughput based on an assumption that all frequency and time resources are allocated to the receiving apparatus 600 . Also, the MAC processing unit 6091 may calculate a MAC layer throughput based on hypothetical frequency and time resources (allocation frequency) input from the outside via the external input/output unit 610 .
  • the MAC processing unit 6091 After calculations, the MAC processing unit 6091 inputs the calculated MAC layer throughputs to the external input/output unit 610 .
  • the RLC (radio link control) processing unit 6092 performs, for uplink, RLC layer transmission processing such as segmentation/concatenation of packet data and transmission processing in RLC retransmission control, and performs, for downlink, RLC layer reception processing such as segmentation/concatenation of packet data and reception processing in RLC retransmission control.
  • the RLC processing unit 6092 may be configured to perform PDCP layer processing in addition to the RLC layer processing described above.
  • the RLC processing unit 6092 may be configured to measure uplink and downlink RLC layer throughputs and to input the measured throughputs to the external input/output unit 610 .
  • the RLC layer throughputs may be represented by averages in the time domain.
  • An average in the time domain may be calculated over an averaging period defined as a parameter. For example, an average may be calculated over an averaging period of 1 s. Also, the average calculated over 1 s may be filtered using the following formula to obtain a value F n :
  • the averaging period and the filtering factor “a” may be provided as parameters in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • throughputs may be averaged based on positional information of the receiving apparatus 600 .
  • RLC layer throughputs may be averaged over an averaging interval of 100 m, i.e., every 100-m movement of the receiving apparatus 600 .
  • a two-dimensional parameter such as 100 m 2 may be specified for the averaging interval instead of a one-dimensional parameter such as 100 m.
  • the positional information is input via the external input/output unit 610 .
  • the averaging interval based on the positional information may be provided as a parameter in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • the RLC processing unit 6092 may be configured to calculate an RLC layer throughput based on resource allocation information in the frequency domain and/or the time domain. That is, the RLC processing unit 6091 may calculate an actual RLC layer throughput or calculate an RLC layer throughput based on an assumption that all frequency and time resources are allocated to the receiving apparatus 600 . Also, the RLC processing unit 6092 may calculate an RLC layer throughput based on hypothetical frequency and time resources (allocation frequency) input from the outside via the external input/output unit 610 .
  • the RLC processing unit 6092 inputs the calculated RLC layer throughputs to the external input/output unit 610 .
  • the signal generating unit 6093 encodes and data-modulates an uplink shared channel, a sounding reference signal, and/or an uplink control channel such as downlink quality information and acknowledgement information for a downlink shared channel, and thereby generates an uplink transmission signal.
  • the transmission processing unit 6094 performs transmission processing such as DFT processing, IFFT processing, and CP addition.
  • the external input/output unit 610 outputs calculated (measured) values from the uplink quality measuring unit 6086 , the downlink quality measuring unit 6087 , the reference signal measuring unit 6089 , the MAC processing unit 6091 , and the RLC processing unit 6092 of the baseband signal processing unit 608 , the call processing unit 612 , and the application unit 614 to external interfaces.
  • the external input/output unit 610 displays the calculated values as numerical data and/or graphs on a monitor screen or stores the calculated values as numerical data in a storage medium such as a memory or a hard disk.
  • the external input/output unit 610 also receives information regarding a serving cell at a given timing from the call processing unit 612 .
  • the external input/output unit 610 may output the calculated values to an external interface (e.g., a monitor screen or a storage medium) together with the information regarding the serving cell.
  • an external interface e.g., a monitor screen or a storage medium
  • the external input/output unit 610 may obtain positional information of the receiving apparatus 600 and output calculated (measured) values from the uplink quality measuring unit 6086 , the downlink quality measuring unit 6087 , and the reference signal measuring unit 6089 to an external interface (e.g., a monitor screen or a storage medium) together with the positional information.
  • the positional information may be obtained, for example, from a positional information obtaining device such as the GPS 700 connected to the external input/output unit 610 .
  • the calculated (measured) values from the uplink quality measuring unit 6086 , the downlink quality measuring unit 6087 , the reference signal measuring unit 6089 , the MAC processing unit 6091 , the RLC processing unit 6092 , and the application unit 614 may be represented by averages in the time domain or averages calculated based on the positional information.
  • the positional information obtained from the GPS 700 is input via the external input/output unit 610 to the corresponding units.
  • the external input/output unit 610 may also be configured to store parameters used by the uplink quality measuring unit 6086 , the downlink quality measuring unit 6087 , the reference signal measuring unit 6089 , the MAC processing unit 6091 , and the RLC processing unit 6092 of the baseband signal processing unit 608 and the application unit 614 , and to input the parameters to the corresponding units.
  • the parameters may be stored as internal parameters of the receiving apparatus 600 or may be input from an external interface.
  • the call processing unit 612 performs call processing such as establishment, handover, and release of communication channels, and status management of the receiving apparatus 600 .
  • the call processing unit 612 also receives calculated (measured) values regarding a downlink reference signal transmitted from the serving cell, i.e., the base station 200 , and a neighboring base station from the reference signal measuring unit 6089 of the baseband signal processing unit 608 , generates a measurement report based on the downlink reference signal, and transmits the measurement report via the baseband signal processing unit 608 , the transceiver unit 606 , the amplifier 604 , and the antenna 602 to the base station 200 .
  • the call processing unit 612 also outputs the contents of the measurement report to the external input/output unit 610 .
  • the contents of the measurement report input to the external input/output unit 610 are output, for example, as graphs or numerical data to the outside (e.g., a monitor screen or a storage medium) as described later. Also, contents of the measurement report may be output as graphs or numerical data to the outside (e.g., a monitor screen or a storage medium) together with the positional information of the receiving apparatus 600 .
  • the contents of the measurement report are output to the outside to allow a network operator (or a user, a device, or so on) to determine whether the quality of handover is appropriately maintained and to optimize parameters related to handover such as handover hysteresis and “time to trigger”.
  • the call processing unit 612 reports, for example, information on the current serving cell to the components of the baseband signal processing unit 608 and the external input/output unit 610 .
  • the application unit 614 performs processing regarding upper layers higher than the physical layer, the MAC layer, and the RLC layer.
  • the application unit 614 uploads and downloads files to and from a server to enable the receiving apparatus 600 to continue communications with the base station 200 .
  • the application unit 614 may also be configured to measure uplink and downlink TCP layer throughputs and to input the measured throughputs to the external input/output unit 610 .
  • the TCP layer throughputs may be represented by averages in the time domain.
  • An average in the time domain may be calculated over an averaging period defined as a parameter. For example, an average may be calculated over an averaging period of 1 s. Also, the average calculated over 1 s may be filtered using the following formula to obtain a value F n :
  • the averaging period and the filtering factor “a” may be provided as parameters in the receiving apparatus 600 or may be input from the outside via the external input/output unit 110 .
  • throughputs may be averaged based on positional information of the receiving apparatus 600 .
  • TCP layer throughputs may be averaged over an averaging interval of 100 m, i.e., every 100-m movement of the receiving apparatus 600 .
  • a two-dimensional parameter such as 100 m 2 may be specified for the averaging interval instead of a one-dimensional parameter such as 100 m.
  • the positional information is input via the external input/output unit 610 .
  • the averaging interval based on the positional information may be provided as a parameter in the receiving apparatus 600 or may be input from the outside via the external input/output unit 610 .
  • the application unit 614 may be configured to calculate a TCP layer throughput based on resource allocation information in the frequency domain and/or the time domain. That is, the application unit 614 may calculate an actual TCP layer throughput or calculate a TCP layer throughput based on an assumption that all frequency and time resources are allocated to the receiving apparatus 600 . Also, the application unit 614 may calculate a TCP layer throughput based on hypothetical frequency and time resources (allocation frequency) input from the outside via the external input/output unit 610 .
  • the application unit 614 may be configured to obtain dump data of the TCP layer and to obtain data regarding temporal change in the TCP sequence number, duplicate ACK, and TCP retransmission from the dump data.
  • the application unit 614 inputs the uplink and downlink TCP layer throughputs and the obtained data regarding temporal change in the TCP sequence number, duplicate ACK, and TCP retransmission to the external input/output unit 610 .
  • a receiving apparatus 600 for communication area evaluation according to a fourth embodiment of the present invention is different from the receiving apparatuses of the above embodiments in that it includes multiple receiving units having different receiving capabilities.
  • “receiving capability” is defined, for example, by the number of receiving antennas, a distance between multiple receiving antennas, a difference in antenna gain between multiple receiving antennas, a receiving algorithm, and/or a signal separation algorithm in MIMO.
  • the receiving apparatus 600 of this embodiment has a configuration similar to that shown in FIG. 5 or FIG. 18 , but includes multiple baseband signal processing units having different receiving capabilities.
  • Each of the baseband signal processing units includes an uplink quality measuring unit 6086 , a downlink quality measuring unit 6087 , a delay profile measuring unit 6088 , a reference signal measuring unit 6089 , and an error rate obtaining unit 6090 ; and calculates and outputs uplink quality, downlink quality, a delay profile, a reference signal measurement, and an error rate corresponding to its receiving capability.
  • the baseband signal processing units output multiple sets of calculation results.
  • each of the baseband signal processing units may be configured to obtain positional information of the receiving apparatus 600 and to output uplink quality, downlink quality, a delay profile, a reference signal measurement, and an error rate in association with the positional information.
  • a receiving apparatus including multiple baseband signal processing units with different receiving capabilities makes it possible to simultaneously evaluate communication qualities for different receiving capabilities and thereby makes it possible to determine effective differences between the receiving capabilities. Also, it is possible to provide a highly-efficient communication system by designing a service (or communication) area based on such evaluation results.
  • the radio communication system 1000 is based on Evolved UTRA and UTRAN (also called Long Term Evolution or Super 3G).
  • Evolved UTRA and UTRAN also called Long Term Evolution or Super 3G
  • a mobile station, a base station, a mobile communication system, and a communication control method according to aspects of the present invention may be used for any system using shared channels for communications.
  • the present invention may also be applied to W-CDMA and HSDPA in 3GPP and 1xEV-DO and UMB in 3GPP2.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Power Engineering (AREA)
  • Quality & Reliability (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Radio Transmission System (AREA)
US12/672,439 2007-08-14 2008-08-06 Receiving apparatus and data obtaining method Abandoned US20100208603A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
JP2007-211590 2007-08-14
JP2007211590 2007-08-14
PCT/JP2008/064112 WO2009022599A1 (ja) 2007-08-14 2008-08-06 受信装置及びデータ取得方法

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2008/064112 A-371-Of-International WO2009022599A1 (ja) 2007-08-14 2008-08-06 受信装置及びデータ取得方法

Related Child Applications (2)

Application Number Title Priority Date Filing Date
US13/674,588 Division US8964587B2 (en) 2007-08-14 2012-11-12 Receiving apparatus and data obtaining method
US13/674,610 Division US8750216B2 (en) 2007-08-14 2012-11-12 Receiving apparatus and data obtaining method

Publications (1)

Publication Number Publication Date
US20100208603A1 true US20100208603A1 (en) 2010-08-19

Family

ID=40350653

Family Applications (3)

Application Number Title Priority Date Filing Date
US12/672,439 Abandoned US20100208603A1 (en) 2007-08-14 2008-08-06 Receiving apparatus and data obtaining method
US13/674,610 Expired - Fee Related US8750216B2 (en) 2007-08-14 2012-11-12 Receiving apparatus and data obtaining method
US13/674,588 Expired - Fee Related US8964587B2 (en) 2007-08-14 2012-11-12 Receiving apparatus and data obtaining method

Family Applications After (2)

Application Number Title Priority Date Filing Date
US13/674,610 Expired - Fee Related US8750216B2 (en) 2007-08-14 2012-11-12 Receiving apparatus and data obtaining method
US13/674,588 Expired - Fee Related US8964587B2 (en) 2007-08-14 2012-11-12 Receiving apparatus and data obtaining method

Country Status (6)

Country Link
US (3) US20100208603A1 (zh)
EP (1) EP2180620A4 (zh)
JP (2) JPWO2009022599A1 (zh)
KR (1) KR101590414B1 (zh)
CN (3) CN102739602B (zh)
WO (1) WO2009022599A1 (zh)

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20100214938A1 (en) * 2009-02-24 2010-08-26 Qualcomm Incorporated Flexible data and control multiplexing
US20100255867A1 (en) * 2007-10-30 2010-10-07 Ntt Docomo, Inc. Base station apparatus, mobile station, and communications control method
CN102468912A (zh) * 2010-11-11 2012-05-23 中兴通讯股份有限公司 上行控制信道的解码方法和装置
US20120213109A1 (en) * 2011-02-22 2012-08-23 Qualcomm Incorporated Discovery reference signal design for coordinated multipoint operations in heterogeneous networks
US20120281551A1 (en) * 2011-05-02 2012-11-08 Renesas Mobile Corporation method for setting a mobile node specific cyclic prefix in a mobile communication
US20130176874A1 (en) * 2011-12-09 2013-07-11 Qualcomm Incorporated Uplink power/rate shaping for enhanced interference coordination and cancellation
US20130196603A1 (en) * 2012-01-30 2013-08-01 Qualcomm Incorporated Flexible radio resource management (rrm) measurements for wireless networks
US20130281148A1 (en) * 2010-12-28 2013-10-24 Fujitsu Limited Wireless communication system, mobile station, base station and wireless communication method
US20130301411A1 (en) * 2011-01-28 2013-11-14 Nec Corporation Throughput estimation device
US20140003288A1 (en) * 2010-12-02 2014-01-02 Xueming Pan Method, system, and device for confirming uplink-downlink configuration
WO2014025157A1 (en) * 2012-08-05 2014-02-13 Lg Electronics Inc. Method of configuring cyclic prefix for small cell in wireless communication system and apparatus therefor
US20140185464A1 (en) * 2012-12-27 2014-07-03 Lei Yang Systems and Methods for Reducing Variations in Received Signal Strength Indicator (RSSI) Measurements for Location Sensing
US20140307662A1 (en) * 2011-12-02 2014-10-16 Huawei Technologies Co., Ltd. Method and apparatus for processing receive/transmit transition time of user equipment
US20140313969A1 (en) * 2011-11-15 2014-10-23 Kyocera Corporation Handover management using a broadcast channel in a network having synchronized base stations
US20150036583A1 (en) * 2009-04-29 2015-02-05 Alcatel-Lucent Method, base station, and broadcast multicast service center for creating, updating, and releasing synchronization entities
US20150156664A1 (en) * 2012-07-20 2015-06-04 Sony Corporation Wireless communication device, information processing device, communication system, and communication quality calculation method and program
US20150215184A1 (en) * 2014-01-30 2015-07-30 Qualcomm Incorporated Determination of end-to-end transport quality
US9282531B1 (en) * 2015-03-02 2016-03-08 Mitsubishi Electric Research Laboratories, Inc. Method and system for localization of a device in an enclosed environment based on received signal strength levels
US9363704B2 (en) * 2014-06-20 2016-06-07 Apple Inc. Selecting a physical data channel based on application traffic pattern
US20160205611A1 (en) * 2015-01-13 2016-07-14 Fujitsu Limited Control apparatus and method of base station
US9451571B2 (en) * 2014-09-22 2016-09-20 Alcatel Lucent Determining uplink and downlink delays between a baseband unit and a remote radio head
US20170070961A1 (en) * 2015-09-03 2017-03-09 Qualcomm Incorporated Power control in wireless networks
US20180097918A1 (en) * 2016-09-30 2018-04-05 Mediatek Inc. Segmentation and Concatenation for New Radio Systems
USRE48280E1 (en) * 2012-06-26 2020-10-20 Huawei Technologies Co., Ltd. Method and system for dynamic cell configuration
US11159198B2 (en) * 2019-06-12 2021-10-26 Nec Corporation Radio communication apparatus, radio communication system, radio communication method, and program
US11160097B2 (en) * 2014-04-25 2021-10-26 Hewlett Packard Enterprise Development Lp Enforcing station fairness with MU-MIMO deployments
US20220094420A1 (en) * 2017-06-02 2022-03-24 Apple Inc. Beamformed Measurement for New Radio (NR)

Families Citing this family (16)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP5478094B2 (ja) * 2009-03-09 2014-04-23 株式会社Ｎｔｔドコモ 無線基地局
US8014311B2 (en) * 2009-06-08 2011-09-06 Telefonaktiebolaget L M Ericsson (Publ) Signal measurements based on sync signals
CN101931599B (zh) * 2009-06-23 2013-08-07 中兴通讯股份有限公司 单频多播网络子帧及用户数据信道的发送装置及方法
WO2011013962A2 (ko) 2009-07-26 2011-02-03 엘지전자 주식회사 중계기를 위한 제어 정보 및 시스템 정보를 송수신하는 장치 및 그 방법
US20110080838A1 (en) * 2009-10-02 2011-04-07 Telefonaktiebolaget Lm Ericsson (Publ) Methods and Arrangements in a Mobile Telecommunication Network
WO2011102289A1 (ja) * 2010-02-16 2011-08-25 日本電気株式会社 受信機および信号受信電力推定方法
JP5630898B2 (ja) * 2010-04-15 2014-11-26 シャープ株式会社 基地局装置、端末装置、および無線通信システム
US9003022B2 (en) * 2010-06-17 2015-04-07 Zettics, Inc. Determining an average effective data through-put as corresponds to a network-served end user
US9681401B2 (en) 2011-03-17 2017-06-13 Google Technology Holdings LLC Enhanced power headroom reporting in wireless communication networks
US8982849B1 (en) * 2011-12-15 2015-03-17 Marvell International Ltd. Coexistence mechanism for 802.11AC compliant 80 MHz WLAN receivers
JP2013219507A (ja) * 2012-04-06 2013-10-24 Ntt Docomo Inc 無線通信方法、ローカルエリア基地局装置、移動端末装置及び無線通信システム
US9179355B2 (en) * 2014-01-09 2015-11-03 Apple Inc. Cell utilization estimation by a wireless device
US9949257B2 (en) * 2014-07-18 2018-04-17 Qualcomm Incorporated Resource management for UEs under coverage enhancement
US20160128045A1 (en) * 2014-10-31 2016-05-05 Qualcomm Incorporated Reliable transmission of information on control channels
JP6792267B2 (ja) * 2017-04-04 2020-11-25 日本電信電話株式会社 無線基地局制御方法および無線基地局制御装置
US11330451B2 (en) * 2020-07-20 2022-05-10 Vmware, Inc. Service aware closed loop uplink power control optimization

Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20030053413A1 (en) * 2001-08-30 2003-03-20 Ntt Docomo, Inc. Radio transmission system and method, and transmitter apparatus and receiver apparatus used in the radio transmission system
US20030147358A1 (en) * 2001-05-16 2003-08-07 Katsuhiko Hiramatsu Radio base station apparatus and communication terminal
US20040091026A1 (en) * 2002-10-31 2004-05-13 Takashi Nakayama Circuit for detecting a shifted frequency, a method for detecting a shifted frequency and portable communication apparatus
US20040105382A1 (en) * 2000-05-25 2004-06-03 Kenichi Miyoshi Radio reception apparatus
US20050255819A1 (en) * 2004-05-13 2005-11-17 Ntt Docomo, Inc. Path searcher and path searching method
US20060007890A1 (en) * 2004-06-15 2006-01-12 Hitoshi Yokoyama Method and apparatus for performing adaptive control of beam forming
US20060067384A1 (en) * 2004-09-30 2006-03-30 Yan Zhang Path search method for CDMA communication systems
US20060172704A1 (en) * 2003-08-12 2006-08-03 Akihiko Nishio Radio communication apparatus and pilot symbol transmission method
US20060258303A1 (en) * 2003-04-21 2006-11-16 Mitsubishi Denki Kabushiki Kaisha Radio communication apparatus, transmitter apparatus, receiver apparatus and radio communication system
US20080253300A1 (en) * 2005-04-20 2008-10-16 Mitsubishi Electric Corporation Communication Quality Judgment Method, Mobile Station, Base Station, and Communications System
US8249514B2 (en) * 2006-04-27 2012-08-21 Kyocera Corporation Radio communication method, device and system for equalizing a signal
US8270514B2 (en) * 2005-01-17 2012-09-18 Sharp Kabushiki Kaisha Communication device

Family Cites Families (41)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP3380455B2 (ja) 1997-12-26 2003-02-24 清水建設株式会社 セグメント搬送台車
JP2000261370A (ja) * 1999-03-11 2000-09-22 Kokusai Electric Co Ltd 移動局
JP2001024577A (ja) 1999-07-07 2001-01-26 Ntt Docomo Inc サービスエリア評価用データ取得方法および装置ならびにサービスエリア評価システム
US6522888B1 (en) 1999-08-31 2003-02-18 Lucent Technologies Inc. System for determining wireless coverage using location information for a wireless unit
DE60134716D1 (de) * 2000-01-20 2008-08-21 Nortel Networks Ltd Adaptive rahmenstrukturen für hybride cdma / tdma systeme
JP2001274773A (ja) * 2000-03-28 2001-10-05 Hitachi Kokusai Electric Inc 通信システム及びビット誤り率測定方法
JP3424659B2 (ja) * 2000-06-02 2003-07-07 日本電気株式会社 マルチビーム受信装置
JP2003298510A (ja) * 2000-06-26 2003-10-17 Matsushita Electric Ind Co Ltd 送信パワ制御方法
JP4790924B2 (ja) * 2001-03-30 2011-10-12 京セラ株式会社 携帯通信端末
US7280504B2 (en) * 2001-09-28 2007-10-09 Kabushiki Kaisha Toshiba OFDM transmitting and receiving apparatus
JP2004165979A (ja) * 2002-11-13 2004-06-10 Matsushita Electric Ind Co Ltd 移動通信端末装置および移動通信方法
JP4197482B2 (ja) 2002-11-13 2008-12-17 パナソニック株式会社 基地局の送信方法、基地局の送信装置及び通信端末
JP4152817B2 (ja) * 2003-06-30 2008-09-17 京セラ株式会社 無線通信システム、無線通信装置、無線通信端末
JP3943062B2 (ja) 2003-08-25 2007-07-11 シャープ株式会社 Ｃｄｍａ受信装置、ｃｄｍａ受信方法、ｃｄｍａ受信プログラム、及び、プログラム記録媒体
JP4088243B2 (ja) * 2003-11-20 2008-05-21 松下電器産業株式会社 無線通信装置及び伝送レート予測方法
ES2290530T3 (es) * 2003-12-22 2008-02-16 Telefonaktiebolaget Lm Ericsson (Publ) Metodo de medicion para programacion espacial.
JP2006023267A (ja) * 2004-06-09 2006-01-26 Ntt Docomo Inc マルチパス遅延成分を用いた位置測定装置および位置測定方法
WO2006051587A1 (ja) * 2004-11-10 2006-05-18 Fujitsu Limited セル選択装置及びセル選択方法
CN102170329B (zh) * 2004-11-16 2014-09-10 高通股份有限公司 Mimo通信系统的闭环速率控制
CN101099310B (zh) * 2005-01-12 2012-05-02 日本电气株式会社 用户吞吐量地理分布估计系统和用户吞吐量地理分布估计方法
WO2006075732A1 (ja) * 2005-01-17 2006-07-20 Sharp Kabushiki Kaisha 無線通信装置
KR100957314B1 (ko) * 2005-02-16 2010-05-12 삼성전자주식회사 셀룰라 무선 이동 통신 시스템에서 역방향 트래픽 로드 제어 시스템 및 방법
US20060199544A1 (en) 2005-03-02 2006-09-07 Lucent Technologies Inc. Method for exploiting the diversity across frequency bands of a multi-carrier cellular system
US7872981B2 (en) * 2005-05-12 2011-01-18 Qualcomm Incorporated Rate selection for eigensteering in a MIMO communication system
US8599945B2 (en) * 2005-06-16 2013-12-03 Qualcomm Incorporated Robust rank prediction for a MIMO system
US20070071147A1 (en) * 2005-06-16 2007-03-29 Hemanth Sampath Pseudo eigen-beamforming with dynamic beam selection
US8358714B2 (en) * 2005-06-16 2013-01-22 Qualcomm Incorporated Coding and modulation for multiple data streams in a communication system
JP4564430B2 (ja) * 2005-09-05 2010-10-20 シャープ株式会社 通信装置、通信方法、無線通信システムおよび無線通信方法
JP4229936B2 (ja) * 2005-09-26 2009-02-25 京セラ株式会社 無線通信方法及び無線通信装置
JP4151981B2 (ja) * 2005-10-24 2008-09-17 京セラコミュニケーションシステム株式会社 スループット測定システムおよびその方法
JP2007116637A (ja) * 2005-10-24 2007-05-10 Fujitsu Ltd 無線通信方法及び無線通信システム並びに受信装置及び送信装置
US8054894B2 (en) * 2005-10-31 2011-11-08 Motorola Mobility, Inc. Method and apparatus for providing channel quality feedback in an orthogonal frequency division multiplexing communication system
JP4050295B2 (ja) * 2005-11-10 2008-02-20 株式会社東芝 通信システム、移動通信端末装置及び制御局
EP2439861B1 (en) * 2005-12-20 2013-10-02 Huawei Technologies Co., Ltd. Transmitter apparatus for communications system using multiple antennas
WO2007072828A1 (ja) * 2005-12-20 2007-06-28 Sharp Kabushiki Kaisha 通信システムおよびそれに用いる基地局および端末
US8885744B2 (en) * 2006-11-10 2014-11-11 Qualcomm Incorporated Providing antenna diversity in a wireless communication system
WO2008085838A1 (en) * 2007-01-04 2008-07-17 Interdigital Technology Corporation Method and apparatus for handover using a candidate set
US7649831B2 (en) * 2007-05-30 2010-01-19 Samsung Electronics Co., Ltd. Multi-user MIMO feedback and transmission in a wireless communication system
GB2464427B (en) * 2007-08-10 2012-04-04 Lg Electronics Inc Method of reporting measurement result in wireless communication system
WO2009045078A2 (en) * 2007-10-05 2009-04-09 Lg Electronics Inc. Method of performing cell reselection in wireless communication system
US8503400B2 (en) 2008-09-18 2013-08-06 Sharp Laboratories Of America, Inc. Systems and methods for closed subscriber group cell reselection

Patent Citations (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20040105382A1 (en) * 2000-05-25 2004-06-03 Kenichi Miyoshi Radio reception apparatus
US7298692B2 (en) * 2001-05-16 2007-11-20 Matsushita Electric Industrial Co., Ltd. Radio base station apparatus and communication terminal
US20030147358A1 (en) * 2001-05-16 2003-08-07 Katsuhiko Hiramatsu Radio base station apparatus and communication terminal
US20030053413A1 (en) * 2001-08-30 2003-03-20 Ntt Docomo, Inc. Radio transmission system and method, and transmitter apparatus and receiver apparatus used in the radio transmission system
US20040091026A1 (en) * 2002-10-31 2004-05-13 Takashi Nakayama Circuit for detecting a shifted frequency, a method for detecting a shifted frequency and portable communication apparatus
US20060258303A1 (en) * 2003-04-21 2006-11-16 Mitsubishi Denki Kabushiki Kaisha Radio communication apparatus, transmitter apparatus, receiver apparatus and radio communication system
US20060172704A1 (en) * 2003-08-12 2006-08-03 Akihiko Nishio Radio communication apparatus and pilot symbol transmission method
US20050255819A1 (en) * 2004-05-13 2005-11-17 Ntt Docomo, Inc. Path searcher and path searching method
US20060007890A1 (en) * 2004-06-15 2006-01-12 Hitoshi Yokoyama Method and apparatus for performing adaptive control of beam forming
US20060067384A1 (en) * 2004-09-30 2006-03-30 Yan Zhang Path search method for CDMA communication systems
US8270514B2 (en) * 2005-01-17 2012-09-18 Sharp Kabushiki Kaisha Communication device
US20080253300A1 (en) * 2005-04-20 2008-10-16 Mitsubishi Electric Corporation Communication Quality Judgment Method, Mobile Station, Base Station, and Communications System
US8249514B2 (en) * 2006-04-27 2012-08-21 Kyocera Corporation Radio communication method, device and system for equalizing a signal

Cited By (55)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US8583152B2 (en) * 2007-10-30 2013-11-12 Ntt Docomo, Inc. Base station apparatus, mobile station, and communications control method
US20100255867A1 (en) * 2007-10-30 2010-10-07 Ntt Docomo, Inc. Base station apparatus, mobile station, and communications control method
US20100214938A1 (en) * 2009-02-24 2010-08-26 Qualcomm Incorporated Flexible data and control multiplexing
US9609611B2 (en) * 2009-04-29 2017-03-28 Alcatel Lucent Method, base station, and broadcast multicast service center for creating, updating, and releasing synchronization entities
US20150036583A1 (en) * 2009-04-29 2015-02-05 Alcatel-Lucent Method, base station, and broadcast multicast service center for creating, updating, and releasing synchronization entities
CN102468912A (zh) * 2010-11-11 2012-05-23 中兴通讯股份有限公司 上行控制信道的解码方法和装置
US20140003288A1 (en) * 2010-12-02 2014-01-02 Xueming Pan Method, system, and device for confirming uplink-downlink configuration
US9554288B2 (en) * 2010-12-02 2017-01-24 Datang Mobile Communications Equipment Co., Ltd Method, system, and device for confirming uplink-downlink configuration
US20130281148A1 (en) * 2010-12-28 2013-10-24 Fujitsu Limited Wireless communication system, mobile station, base station and wireless communication method
US9560606B2 (en) * 2010-12-28 2017-01-31 Fujitsu Limited Wireless communication system, mobile station, base station and wireless communication method
US20130301411A1 (en) * 2011-01-28 2013-11-14 Nec Corporation Throughput estimation device
US9271186B2 (en) * 2011-01-28 2016-02-23 Nec Corporation Throughput estimation device
EP2670185A4 (en) * 2011-01-28 2017-05-17 Nec Corporation Throughput estimation device
US20120213109A1 (en) * 2011-02-22 2012-08-23 Qualcomm Incorporated Discovery reference signal design for coordinated multipoint operations in heterogeneous networks
US9635624B2 (en) * 2011-02-22 2017-04-25 Qualcomm Incorporated Discovery reference signal design for coordinated multipoint operations in heterogeneous networks
US8792369B2 (en) * 2011-05-02 2014-07-29 Broadcom Corporation Method for setting a mobile node specific cyclic prefix in a mobile communication
US20120281551A1 (en) * 2011-05-02 2012-11-08 Renesas Mobile Corporation method for setting a mobile node specific cyclic prefix in a mobile communication
US20140313969A1 (en) * 2011-11-15 2014-10-23 Kyocera Corporation Handover management using a broadcast channel in a network having synchronized base stations
US9706369B2 (en) * 2011-11-15 2017-07-11 Kyocera Corporation Handover management using a broadcast channel in a network having synchronized base stations
US20140307662A1 (en) * 2011-12-02 2014-10-16 Huawei Technologies Co., Ltd. Method and apparatus for processing receive/transmit transition time of user equipment
US9615372B2 (en) * 2011-12-02 2017-04-04 Huawei Technologies Co., Ltd. Method and apparatus for processing receive/transmit transition time of user equipment
US20130176874A1 (en) * 2011-12-09 2013-07-11 Qualcomm Incorporated Uplink power/rate shaping for enhanced interference coordination and cancellation
US10972920B2 (en) * 2012-01-30 2021-04-06 Qualcomm Incorporated Flexible radio resource management (RRM) measurements for wireless networks
US20130196603A1 (en) * 2012-01-30 2013-08-01 Qualcomm Incorporated Flexible radio resource management (rrm) measurements for wireless networks
USRE49020E1 (en) 2012-06-26 2022-04-05 Huawei Technologies Co., Ltd. Method and system for dynamic cell configuration
USRE48529E1 (en) 2012-06-26 2021-04-20 Huawei Technologies Co., Ltd. Method and system for dynamic cell configuration
USRE48530E1 (en) 2012-06-26 2021-04-20 Huawei Technologies Co., Ltd. Method and system for dynamic cell configuration
USRE48648E1 (en) 2012-06-26 2021-07-13 Huawei Technologies Co., Ltd. Method and system for dynamic cell configuration
USRE48543E1 (en) 2012-06-26 2021-04-27 Huawei Technologies Co., Ltd. Method and system for dynamic cell configuration
USRE48634E1 (en) 2012-06-26 2021-07-06 Huawei Technologies Co., Ltd. Method and system for dynamic cell configuration
USRE48396E1 (en) 2012-06-26 2021-01-12 Huawei Technologies Co., Ltd. Method and system for dynamic cell configuration
USRE48281E1 (en) 2012-06-26 2020-10-20 Huawei Technologies Co., Ltd. Method and system for dynamic cell configuration
USRE48280E1 (en) * 2012-06-26 2020-10-20 Huawei Technologies Co., Ltd. Method and system for dynamic cell configuration
US20150156664A1 (en) * 2012-07-20 2015-06-04 Sony Corporation Wireless communication device, information processing device, communication system, and communication quality calculation method and program
US10616794B2 (en) * 2012-07-20 2020-04-07 Sony Corporation Wireless communication device, information processing device, communication system, and communication quality calculation method and program
WO2014025157A1 (en) * 2012-08-05 2014-02-13 Lg Electronics Inc. Method of configuring cyclic prefix for small cell in wireless communication system and apparatus therefor
US9843434B2 (en) 2012-08-05 2017-12-12 Lg Electronics Inc. Method of configuring cyclic prefix for small cell in wireless communication system and apparatus therefor
US20140185464A1 (en) * 2012-12-27 2014-07-03 Lei Yang Systems and Methods for Reducing Variations in Received Signal Strength Indicator (RSSI) Measurements for Location Sensing
US9310465B2 (en) * 2012-12-27 2016-04-12 Intel Corporation Systems and methods for reducing variations in received signal strength indicator (RSSI) measurements for location sensing
US10142202B2 (en) * 2014-01-30 2018-11-27 Qualcomm Incorporated Determination of end-to-end transport quality
TWI643505B (zh) * 2014-01-30 2018-12-01 美商高通公司 端至端傳輸品質之決定
US20150215184A1 (en) * 2014-01-30 2015-07-30 Qualcomm Incorporated Determination of end-to-end transport quality
US11160097B2 (en) * 2014-04-25 2021-10-26 Hewlett Packard Enterprise Development Lp Enforcing station fairness with MU-MIMO deployments
US9363704B2 (en) * 2014-06-20 2016-06-07 Apple Inc. Selecting a physical data channel based on application traffic pattern
US9451571B2 (en) * 2014-09-22 2016-09-20 Alcatel Lucent Determining uplink and downlink delays between a baseband unit and a remote radio head
US20160205611A1 (en) * 2015-01-13 2016-07-14 Fujitsu Limited Control apparatus and method of base station
US9282531B1 (en) * 2015-03-02 2016-03-08 Mitsubishi Electric Research Laboratories, Inc. Method and system for localization of a device in an enclosed environment based on received signal strength levels
US20170070961A1 (en) * 2015-09-03 2017-03-09 Qualcomm Incorporated Power control in wireless networks
US11032780B2 (en) * 2015-09-03 2021-06-08 Qualcomm Incorporated Power control in wireless networks
US11743837B2 (en) * 2015-09-03 2023-08-29 Qualcomm Incorporated Power control in wireless networks
US20180097918A1 (en) * 2016-09-30 2018-04-05 Mediatek Inc. Segmentation and Concatenation for New Radio Systems
US20220094420A1 (en) * 2017-06-02 2022-03-24 Apple Inc. Beamformed Measurement for New Radio (NR)
US11646781B2 (en) * 2017-06-02 2023-05-09 Apple Inc. Beamformed measurement for new radio (NR)
US20230261726A1 (en) * 2017-06-02 2023-08-17 Apple Inc. Beamformed Measurement for New Radio (NR)
US11159198B2 (en) * 2019-06-12 2021-10-26 Nec Corporation Radio communication apparatus, radio communication system, radio communication method, and program

Also Published As

Publication number Publication date
CN102739602B (zh) 2016-03-16
EP2180620A1 (en) 2010-04-28
US8964587B2 (en) 2015-02-24
JP5528510B2 (ja) 2014-06-25
KR20100042638A (ko) 2010-04-26
CN102761514B (zh) 2015-07-15
JPWO2009022599A1 (ja) 2010-11-11
US8750216B2 (en) 2014-06-10
CN102739602A (zh) 2012-10-17
US20130064126A1 (en) 2013-03-14
WO2009022599A1 (ja) 2009-02-19
EP2180620A4 (en) 2015-06-03
CN102761514A (zh) 2012-10-31
KR101590414B1 (ko) 2016-02-01
US20130064184A1 (en) 2013-03-14
CN101779428A (zh) 2010-07-14
JP2012257263A (ja) 2012-12-27

Similar Documents

Publication Publication Date Title
US8964587B2 (en) Receiving apparatus and data obtaining method
US9538439B2 (en) Method and apparatus for estimating an achievable link throughput based on assistance information
KR101363009B1 (ko) 조정된 멀티-포인트 송신을 위한 자원 블록 재사용
US8660600B2 (en) Over-the-air overload indicator
EP2271031B1 (en) Channel quality indicator for time, frequency and spatial channel in terrestrial radio access network
US20110103367A1 (en) User apparatus, base station apparatus, and transmission control method
US9301161B2 (en) Method and apparatus for available bandwidth estimation by a user equipment in idle and/or connected mode
WO2015029729A1 (ja) 無線基地局、ユーザ端末及び送信電力制御方法
US20130109384A1 (en) Base station apparatus, mobile terminal apparatus and communication control method
US20100034174A1 (en) Base station apparatus and communication control method
JP6022775B2 (ja) 無線通信システム、基地局装置、端末装置及び無線通信制御方法
US20110273997A1 (en) Radio communication system, scheduling method, radio base station device, and radio terminal
US8976729B2 (en) Maximum power spectral density reporting in response to overload indications
GB2525690A (en) Arrangement for choosing transceiver nodes in a mobile telecommunications network
US8983485B2 (en) Base station apparatus, mobile terminal apparatus and scheduling method
JP6609357B2 (ja) 無線基地局及びユーザ端末
Toskala et al. UTRAN Long‐Term Evolution
CN116614866A (zh) 一种被用于无线通信的节点中的方法和装置

Legal Events

Date Code Title Description
AS Assignment

Owner name: NTT DOCOMO, INC., JAPAN

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:ISHII, HIROYUKI;REEL/FRAME:024146/0333

Effective date: 20100115

STCB Information on status: application discontinuation

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