WO2014162576A1 - 通信システム、通信端末、及び基地局 - Google Patents
通信システム、通信端末、及び基地局 Download PDFInfo
- Publication number
- WO2014162576A1 WO2014162576A1 PCT/JP2013/060398 JP2013060398W WO2014162576A1 WO 2014162576 A1 WO2014162576 A1 WO 2014162576A1 JP 2013060398 W JP2013060398 W JP 2013060398W WO 2014162576 A1 WO2014162576 A1 WO 2014162576A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- communication terminal
- unit
- path loss
- base station
- information
- Prior art date
Links
Images
Classifications
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/242—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account path loss
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/70—Services for machine-to-machine communication [M2M] or machine type communication [MTC]
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/06—TPC algorithms
- H04W52/14—Separate analysis of uplink or downlink
- H04W52/146—Uplink power control
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/18—TPC being performed according to specific parameters
- H04W52/24—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
- H04W52/247—TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters where the output power of a terminal is based on a path parameter sent by another terminal
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
- H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
- H04W4/08—User group management
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/383—TPC being performed in particular situations power control in peer-to-peer links
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/38—TPC being performed in particular situations
- H04W52/50—TPC being performed in particular situations at the moment of starting communication in a multiple access environment
Definitions
- the present invention relates to a communication system, a communication terminal, and a base station.
- Machine communication Machine to Machine Communication
- MTC Machine Type Communication
- RP-111112 “Proposed SID: Provision of low-cost MTC UEs based on LTE”, Vodafone Group, 3GPP TSG RAN plenary # 53. R1-112912, “Overview on low-cost MTC UEs based on LTE”, Huawei, HiSilicon, CMCC, 3GPP RAN1 # 66bis. R1-112917, “Considerations on approaches for low-cost MTC UEs”, Sony Corporation / Sony Europe Ltd, 3GPP RAN1 # 66bis. R1-112929, “Standards aspects impacting UE costs”, Ericsson, ST-Ericsson, 3GPP RAN1 # 66bis. 3GPP TR 36.888, “Study on provision of low-cost MTC UEs based on LTE”.
- the disclosed technology has been made in view of the above, and an object of the present invention is to provide a communication system, a communication terminal, and a base station that can realize efficient processing in the system.
- the communication terminal determines the transmission power of the communication terminal based on information on the path loss between the first communication terminal other than the communication terminal and the base station in the group to which the communication terminal belongs.
- the efficiency of processing in the system can be realized.
- FIG. 1 is a diagram illustrating an example of a communication system according to the first embodiment.
- FIG. 2 is a block diagram illustrating an example of a communication terminal according to the first embodiment.
- FIG. 3 is a block diagram illustrating an example of the base station according to the first embodiment.
- FIG. 4 is a sequence diagram illustrating an example of a processing operation of the communication system according to the first embodiment.
- FIG. 5 is a diagram illustrating a hardware configuration of the communication terminal.
- FIG. 6 is a diagram illustrating a hardware configuration of the base station.
- FIG. 1 is a diagram illustrating an example of a communication system according to the first embodiment.
- the communication system 1 includes communication terminals 10-1 to 10-6 and a base station 50.
- the communication terminals 10-1 to 10-6 are located in the cell C50 of the base station 50.
- six communication terminals 10-1 to 10-6 and one base station 50 are shown, but the number of these is not limited to this.
- the communication terminals 10-1 to 10-6 are MTC terminals such as vending machines and gas meters, for example.
- the communication terminals 10-1 to 10-6 may be collectively referred to simply as the communication terminal 10 unless particularly distinguished.
- the communication terminals 10-1 to 10-6 are divided into two groups.
- the first group includes the communication terminals 10-1 to 10-3, and the second group includes the communication terminal 10-4. ⁇ 6 are included.
- the representative communication terminal of the first group is the communication terminal 10-1, and the representative communication terminal of the second group is the communication terminal 10-4.
- These groups and representative communication terminals are determined by the base station 50.
- the base station 50 groups a plurality of communication terminals 10 having a similar channel state with itself.
- the communication terminal 10 has a sleep mode and a work mode (operation mode). In the sleep mode, the communication terminal 10 activates the communication function unit only at the timing when the control signal is transmitted from the base station 50, and stops the communication function unit at other timings. On the other hand, in the work mode, the communication terminal 10 activates the communication function unit as needed.
- the representative communication terminals 10-1 and 4 are set to the work mode. Further, the communication terminals 10-2, 3, 5, and 6, which are non-representative communication terminals, are normally set to the sleep mode, and when the wake-up message is received from the base station 50, the mode is changed from the sleep mode to the work mode. Switch to. Thereby, the power consumption in a non-representative communication terminal can be reduced.
- the wake-up message is a control signal for switching the mode of the non-representative communication terminal 10 from the sleep mode to the work mode.
- Each of the representative communication terminals 10-1 and 10-4 estimates a path loss (PL) between itself and the base station 50, and transmits (reports) information on the estimated path loss to the base station 50.
- PL path loss
- the base station 50 transmits (notifies) information on the path loss received from the representative communication terminal 10 to the non-representative communication terminals 10 in the same group as the representative communication terminal 10. That is, the base station 50 transmits (notifies) information on the path loss received from the representative communication terminal 10-1 to the non-representative communication terminals 10-2 and 3 in the same group as the representative communication terminal 10-1. Further, the base station 50 transmits (notifies) information on the path loss received from the representative communication terminal 10-4 to the non-representative communication terminals 10-5 and 6 in the same group as the representative communication terminal 10-4.
- the base station 50 may transmit (notify) information on path loss together with the wakeup message.
- the non-representative communication terminal 10 determines its own transmission power using the information regarding the path loss received from the base station 50. For example, the non-representative communication terminal 10 determines its own transmission power using the following equation (1).
- P TxMax is the maximum transmission power value of the target communication terminal 10.
- PL is a path loss value between the target communication terminal 10 and the base station 50.
- M is the number of resource blocks assigned to the target communication terminal 10.
- ⁇ is a path loss compensation factor, which can take a value from zero to one.
- P 0 is a nominal transmit power value (nominal transmit power) defined in one resource block.
- the non-representative communication terminal 10 determines its own transmission power with the path loss measured by the representative communication terminal 10 of the group to which it belongs as its own path loss. Therefore, since the path loss measurement process in the non-representative communication terminal 10 can be eliminated, the process in the transmission power control can be reduced. That is, it is possible to increase the efficiency of processing in the system.
- FIG. 2 is a block diagram illustrating an example of a communication terminal according to the first embodiment.
- the communication terminal 10 includes a wireless unit 11, a transmission unit 12, a reception unit 13, a control unit 14, and a GPS processing unit 36.
- the radio unit 11 includes a transmission radio unit 15 and a reception radio unit 16.
- the transmission unit 12 includes encoding units 17 and 18, modulation units 19 and 20, a multiplexing unit 21, an IFFT (Inverse Fast Fourier Transform) unit 22, and a CP (Cyclic Prefix) addition unit 23.
- the reception unit 13 includes a CP removal unit 24, an FFT (Fast Fourier Transform) unit 25, a separation unit 26, a demodulation unit 27, and a decoding unit 28.
- the control unit 14 includes a switching control unit 29, a switch 30, a path loss estimation unit 31, a path loss transmission control unit 32, a transmission power determination unit 33, a control signal generation unit 34, and a reference signal generation unit 35. .
- the transmission radio unit 15 performs a predetermined transmission radio process on the OFDM (Orthogonal Frequency Division Multiplexing) signal received from the transmission unit 12, that is, digital-analog conversion, up-conversion, amplification, and the like to form a radio signal, and the formed radio Transmit the signal through the antenna.
- the transmission radio unit 15 amplifies the OFDM signal to a transmission power value received from the control unit 14.
- the reception radio unit 16 performs predetermined reception radio processing, that is, down-conversion, analog-digital conversion, and the like on the reception signal received via the antenna, and outputs the reception signal after the reception radio processing to the reception unit 13.
- the encoding unit 17 performs an encoding process on transmission data addressed to the communication terminal 10, that is, user data, and outputs the encoded transmission data to the modulation unit 19.
- the modulation unit 19 modulates the transmission data after the encoding process received from the encoding unit 17 and outputs the modulated transmission data to the multiplexing unit 21.
- the encoding unit 18 performs an encoding process on the control signal received from the control unit 14 and outputs the control signal after the encoding process to the modulation unit 20.
- the modulation unit 20 modulates the control signal after the encoding process received from the encoding unit 18 and outputs the control signal after the modulation to the multiplexing unit 21.
- the multiplexing unit 21 maps and multiplexes the input signal to a predetermined resource, and outputs the multiplexed signal to the IFFT unit 22.
- the multiplexing unit 21 maps the control signal received from the modulation unit 20 to a resource area assigned to a downlink control channel (for example, PDCCH: Physical Downlink Control Channel).
- a downlink control channel for example, PDCCH: Physical Downlink Control Channel
- the multiplexing unit 21 maps the transmission data received from the modulation unit 19 to the downlink allocated resource allocated to the destination communication terminal 10.
- the multiplexing unit 21 maps the reference signal received from the control unit 14 to a predetermined resource.
- the IFFT unit 22 performs an inverse fast Fourier transform process on the multiplexed signal received from the multiplexing unit 21 to form an OFDM signal, and outputs the formed OFDM signal to the CP adding unit 23.
- the CP adding unit 23 adds a CP for each symbol to the OFDM signal received from the IFFT unit 22, and outputs the OFDM signal to which the CP has been added to the radio unit 11.
- the CP removal unit 24 removes the CP from the reception signal received from the wireless unit 11 and outputs the reception signal after the CP removal to the FFT unit 25.
- the FFT unit 25 performs a fast Fourier transform process on the received signal received from the CP removing unit 24 and outputs the received signal after the fast Fourier transform process to the separating unit 26.
- the separating unit 26 extracts a control signal and a reference signal from the received signal received from the FFT unit 25, outputs the extracted control signal to the demodulating unit 27, and outputs the extracted reference signal to the path loss estimating unit 31.
- the demodulator 27 demodulates the control signal received from the separator 26 and outputs the demodulated control signal to the decoder 28.
- the decoding unit 28 decodes the control signal received from the demodulation unit 27. Then, the decoding unit 28 outputs the terminal type information addressed to itself contained in the control signal after decoding to the switching control unit 29, and outputs information related to the path loss addressed to itself or a group to which the decoding unit 28 belongs to the switch 30.
- the switching control unit 29 switches the switch 30 based on the terminal type information addressed to itself. Specifically, the switching control unit 29 switches so that information regarding the path loss output from the decoding unit 28 is input to the transmission power determination unit 33 when the terminal type information indicates a non-representative communication terminal. 30 is switched. On the other hand, when the terminal type information indicates the representative communication terminal, the switching control unit 29 switches the switch 30 so that the path loss estimated value output from the path loss estimating unit 31 is input to the transmission power determining unit 33. .
- the path loss transmission control unit 32 When the path loss transmission control unit 32 is a representative communication terminal, the path loss transmission control unit 32 outputs information on the path loss value estimated by the path loss estimation unit 31 to the control signal generation unit 34.
- the transmission power determination unit 33 When the transmission power determination unit 33 is a representative communication terminal, the transmission power determination unit 33 receives the path loss value estimated by the path loss estimation unit 31 and determines its transmission power based on the path loss value. On the other hand, when the transmission power determination unit 33 is a non-representative communication terminal, the transmission power determination unit 33 determines its transmission power based on the information about the path loss output from the decoding unit 28, that is, the path loss value estimated by the representative communication terminal. To do. The transmission power determination unit 33 outputs the determined transmission power value to the transmission radio unit 15.
- the GPS processing unit 36 measures the position of the communication terminal 10 using GPS, and outputs information on the measured position to the control signal generation unit 34.
- the control signal generation unit 34 generates a control signal including information on the path loss received from the path loss transmission control unit 32, and outputs the generated control signal to the encoding unit 18. Further, the control signal generation unit 34 generates a control signal including position information received from the GPS processing unit 36 and outputs the generated control signal to the encoding unit 18.
- the reference signal generation unit 35 generates a reference signal and outputs the generated reference signal to the multiplexing unit 21.
- FIG. 3 is a block diagram illustrating an example of the base station according to the first embodiment.
- the base station 50 includes a radio unit 51, a reception unit 52, a transmission unit 53, and a control unit 54.
- the radio unit 51 includes a reception radio unit 55 and a transmission radio unit 56.
- the reception unit 52 includes a CP removal unit 57, an FFT unit 58, a separation unit 59, demodulation units 60 and 61, and decoding units 62 and 63.
- the transmission unit 53 includes an encoding unit 64, a modulation unit 65, a multiplexing unit 66, an IFFT unit 67, and a CP adding unit 68.
- the control unit 54 includes a path loss information extraction unit 69, a channel estimation unit 70, a determination unit 71, a wakeup message generation unit 72, a control signal generation unit 73, and a reference signal generation unit 74.
- the reception radio unit 55 performs predetermined reception radio processing, that is, down-conversion, analog-digital conversion, and the like on the reception signal received via the antenna, and outputs the reception signal after the reception radio processing to the reception unit 52.
- the transmission radio unit 56 performs predetermined transmission radio processing on the OFDM signal received from the transmission unit 53, that is, digital-analog conversion, up-conversion, amplification, and the like to form a radio signal, and the formed radio signal is transmitted via an antenna. Send.
- the CP removal unit 57 removes the CP from the reception signal received from the wireless unit 51 and outputs the reception signal after the CP removal to the FFT unit 58.
- the FFT unit 58 performs a fast Fourier transform process on the received signal received from the CP removing unit 57 and outputs the received signal after the fast Fourier transform process to the separation unit 59.
- Separation unit 59 extracts a data signal, a control signal, and a reference signal from the received signal received from FFT unit 58, outputs the extracted data signal to demodulation unit 60, and outputs the extracted control signal to demodulation unit 61.
- the extracted reference signal is output to the channel estimation unit 70.
- the demodulator 60 demodulates the data signal received from the separator 59 and outputs the demodulated data signal to the decoder 62.
- the decoding unit 62 decodes the data signal received from the demodulation unit 60 and outputs the obtained decoded data to the subsequent functional unit.
- the demodulator 61 demodulates the control signal received from the separator 59 and outputs the demodulated control signal to the decoder 63.
- the decoding unit 63 decodes the control signal received from the demodulation unit 61, and outputs the decoded control signal to the determination unit 71 and the path loss information extraction unit 69.
- the path loss information extraction unit 69 extracts information on the path loss estimated by the representative communication terminal 10 of each group from the control signal received from the decoding unit 63, and outputs the information to the control signal generation unit 73.
- the channel estimation unit 70 estimates the channel state between each communication terminal 10 and itself based on the reference signal transmitted from each communication terminal 10.
- the determination unit 71 extracts the position information of each communication terminal 10 transmitted from each communication terminal 10 from the control signal received from the decoding unit 63, and groups a plurality of communication terminals 10 based on the extracted position information. . Specifically, it can be estimated that the plurality of communication terminals 10 whose separation distances are not more than a predetermined value are similar to each other in channel state. Therefore, the determination unit 71 groups a plurality of communication terminals 10 whose separation distances are equal to or smaller than a predetermined value into one group. Note that the determination unit 71 may group a plurality of communication terminals 10 based on the channel state estimated by the channel estimation unit 70 instead of the position information.
- the communication terminals 10 belonging to different groups can be combined into one group, so that the number of non-representative communication terminals 10 can be increased. Therefore, since the number of communication terminals 10 that can reduce the processing can be increased, the processing in the system can be made more efficient.
- the determination unit 71 selects one representative communication terminal 10 from the communication terminals 10 belonging to each group. For example, the determination unit 71 selects the communication terminal 10 having the largest communication opportunity among the communication terminals 10 belonging to each group as the representative communication terminal 10.
- the wake-up message generation unit 72 generates a wake-up message addressed to each non-representative communication terminal 10 at the timing of switching the mode of each non-representative communication terminal 10 from the sleep mode to the work mode, and outputs the wake-up message to the control signal generation unit 73.
- the control signal generation unit 73 generates a control signal including information on the group and the representative communication terminal 10 of the group determined by the determination unit 71 and identification information of the group or destination information of the communication terminal 10 belonging to the group, The generated control signal is output to the encoding unit 64.
- control signal generation unit 73 includes a control signal including information on the path loss extracted by the path loss information extraction unit 69 and identification information of the group corresponding to the information or destination information of the non-representative communication terminal 10 of the group. And the generated control signal is output to the encoding unit 64. In addition, the control signal generation unit 73 generates a control signal including a path loss reporting period for each representative communication terminal 10 and outputs the generated control signal to the encoding unit 64.
- control signal generation unit 73 generates a control signal including the wakeup message generated by the wakeup message generation unit 72, and outputs the generated control signal to the encoding unit 64.
- control signal generation unit 73 uses the wake-up message to receive the information related to the path loss extracted by the path loss information extraction unit 69 and the group identification information corresponding to the information or the destination information of the non-representative communication terminal 10 of the group.
- a control signal included together with the signal may be generated. That is, the transmission unit 53 may transmit the wakeup message and the information related to the path loss at the same timing. Thereby, the amount of signaling between the base station 50 and the non-representative communication terminal 10 can be reduced.
- each piece of information included in the control signal and transmitted by the control signal generation unit 73 is transmitted, for example, by a physical downlink control channel (PDCCH). Or each said information may be transmitted by the channel of an upper layer. Or each said information may be input into the encoding part 17, and may be transmitted with a data channel. Further, the channel through which each piece of information is transmitted may be an individual channel or a shared channel.
- a physical downlink control channel PDCCH
- each said information may be transmitted by the channel of an upper layer.
- each said information may be input into the encoding part 17, and may be transmitted with a data channel.
- the channel through which each piece of information is transmitted may be an individual channel or a shared channel.
- FIG. 4 is a sequence diagram illustrating an example of a processing operation of the communication system according to the first embodiment.
- the first group shown in FIG. 1 will be described as an example.
- the communication terminals 10-1 to 10-3 each transmit a control signal including its own location information to the base station 50 (step S101).
- the base station 50 determines the group and the representative communication terminal 10 of each group by the determination unit 71 (step S102). Specifically, the determination unit 71 extracts position information from the control signal, and groups a plurality of communication terminals 10 whose separation distances are equal to or smaller than a predetermined value based on the extracted position information.
- the base station 50 has the communication terminals 10-1 to 10-3 in the same group. Then, the base station 50 selects, for example, the communication terminal 10 having the largest communication opportunity in each group as the representative communication terminal 10 of each group.
- the base station 50 has selected the communication terminal 10-1 as the representative communication terminal 10 of the first group.
- the base station 50 transmits to each communication terminal 10 identification information of the group to which each communication terminal 10 belongs and information related to the representative communication terminal 10 in the group (step S103). For this transmission, for example, a physical downlink control channel (PDCCH) can be used.
- PDCH physical downlink control channel
- the base station 50 notifies the representative communication terminal 10, here the communication terminal 10-1, of information related to the reporting cycle by upper layer signaling (step S 104).
- the base station 50 transmits a reference signal (step S105).
- the communication terminal 10-1 which is the representative communication terminal 10, estimates the path loss between itself and the base station 50 based on the reference signal transmitted from the base station 50 (step S106), and obtains information on the estimated path loss. Transmit (report) to the base station 50 (step S107).
- the base station 50 transmits a wake-up message to the non-representative communication terminal 10, here the communication terminals 10-2 and 3 at the timing of switching the non-representative communication terminal 10 of the first group to the work mode (step S108). .
- the base station 50 transmits information on the path loss reported from the representative communication terminal 10 to the non-representative communication terminal 10 together with the wake-up message.
- Each communication terminal 10 determines its own transmission power using the acquired path loss (step S109). Specifically, the communication terminal 10-1 as the representative communication terminal 10 determines its own transmission power using the path loss value estimated by itself. On the other hand, the communication terminals 10-2 and 3 which are non-representative communication terminals 10 determine their own transmission power using the path loss value estimated by the communication terminal 10-1 received via the base station 50. Here, since the communication terminals 10-2 and 3 receive the information on the path loss together with the wake-up message, the transmission terminals 10-2 and 3 can calculate their own transmission power as soon as their own mode is switched to the work mode.
- the base station 50 performs scheduling for each of the communication terminals 10-1 to 10, and transmits information on the allocated resource block to each of the communication terminals 10-1 to 10-3 (step S110).
- Each of the communication terminals 10-1 to 10-3 transmits data using the resource block assigned to itself (step S111). For this transmission, for example, a physical uplink shared channel (PUSCH) is used.
- PUSCH physical uplink shared channel
- the receiving unit 13 is transmitted from the base station 50 and communicates with the communication terminal 10 that is the representative communication terminal in the group to which the receiver 13 belongs. Information on path loss with the station 50 is received. Then, the transmission power determination unit 33 determines its own transmission power based on the information regarding the path loss received by the reception unit 13.
- the path loss estimated by the communication terminal 10 that is the representative communication terminal is not estimated without estimating the path loss between itself and the base station 50. It can be used to determine transmission power. Thereby, since the path loss measurement process in the communication terminal 10 which is a non-representative communication terminal can be excluded, the process in the transmission power control can be reduced. That is, it is possible to increase the efficiency of processing in the system.
- the non-representative communication terminal 10 is normally set to the sleep mode, and switches the mode from the sleep mode to the work mode by receiving the wake-up message from the base station 50. Thereby, the power consumption in a non-representative communication terminal can be reduced.
- the non-representative communication terminal 10 receives information on the path loss together with the wake-up message. Thereby, the transmission power of the non-representative communication terminal 10 can be determined as soon as the own mode is switched to the work mode.
- the receiving unit 52 receives information related to the path loss between the representative communication terminal 10 and itself, transmitted from the representative communication terminal 10. Then, the transmission unit 53 transmits information on the path loss received by the reception unit 52 to the non-representative communication terminal 10 belonging to the group of the representative communication terminal 10.
- the configuration of the base station 50 can eliminate the path loss measurement process in the non-representative communication terminal 10, the process in the transmission power control can be reduced. That is, it is possible to increase the efficiency of processing in the system.
- the transmission unit 53 transmits information on path loss together with the wake-up message. Thereby, the amount of signaling between the base station 50 and the non-representative communication terminal 10 can be reduced.
- each component of each part illustrated in the first embodiment does not necessarily need to be physically configured as illustrated.
- the specific form of distribution / integration of each unit is not limited to the one shown in the figure, and all or a part thereof may be functionally or physically distributed / integrated in arbitrary units according to various loads and usage conditions. Can be configured.
- each device is all or any part of it on a CPU (Central Processing Unit) (or a micro computer such as MPU (Micro Processing Unit) or MCU (Micro Controller Unit)). You may make it perform.
- CPU Central Processing Unit
- MPU Micro Processing Unit
- MCU Micro Controller Unit
- Various processing functions may be executed entirely or arbitrarily on a program that is analyzed and executed by a CPU (or a microcomputer such as an MPU or MCU) or hardware based on wired logic. .
- the communication terminal and the base station according to the first embodiment can be realized by, for example, the following hardware configuration.
- FIG. 5 is a diagram illustrating a hardware configuration example of the communication terminal.
- the communication terminal 100 includes an RF (Radio Frequency) circuit 101, a GPS circuit 102, a processor 103, and a memory 104.
- RF Radio Frequency
- Examples of the processor 103 include a CPU (Central Processing Unit), a DSP (Digital Signal Processor), an FPGA (Field Programmable Gate Array), and the like.
- Examples of the memory 104 include a RAM (Random Access Memory) such as SDRAM (Synchronous Dynamic Random Access Memory), a ROM (Read Only Memory), a flash memory, and the like.
- the various processing functions performed by the communication terminal according to the first embodiment may be realized by executing a program stored in various memories such as a nonvolatile storage medium by a processor included in the amplification device. That is, a program corresponding to each process executed by the transmission unit 12, the reception unit 13, and the control unit 14 may be recorded in the memory 104, and each program may be executed by the processor 103. In addition, each process executed by the transmission unit 12, the reception unit 13, and the control unit 14 may be shared and executed by a plurality of processors such as a baseband CPU and an application CPU.
- the wireless unit 11 is realized by the RF circuit 101.
- the GPS processing unit 36 is realized by the GPS circuit 102.
- FIG. 6 is a diagram illustrating a hardware configuration example of the base station.
- the base station 200 includes an RF circuit 201, a processor 202, a memory 203, and a network IF (Inter Face) 204.
- the processor 202 include a CPU, a DSP, and an FPGA.
- the memory 203 include RAM such as SDRAM, ROM, flash memory, and the like.
- the various processing functions performed in the base station according to the first embodiment may be realized by executing a program stored in various memories such as a nonvolatile storage medium by a processor included in the amplification device. That is, a program corresponding to each process executed by the reception unit 52, the transmission unit 53, and the control unit 54 may be recorded in the memory 203, and each program may be executed by the processor 202.
Landscapes
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Mobile Radio Communication Systems (AREA)
- Multimedia (AREA)
Abstract
Description
[通信システムの概要]
図1は、実施例1の通信システムの一例を示す図である。図1において通信システム1は、通信端末10-1~6と、基地局50とを有する。通信端末10-1~6は、基地局50のセルC50内に在圏している。なお、ここでは、6つの通信端末10-1~6と1つの基地局50とを示しているが、これらの数はこれに限定されるものではない。通信端末10-1~6は、例えば、自動販売機やガスメータ等のMTC端末である。以下では、通信端末10-1~6を特に区別しない場合には、総称して、単に通信端末10と呼ぶことがある。
図2は、実施例1の通信端末の一例を示すブロック図である。図2において、通信端末10は、無線部11と、送信部12と、受信部13と、制御部14と、GPS処理部36とを有する。無線部11は、送信無線部15と、受信無線部16とを有する。送信部12は、符号化部17,18と、変調部19,20と、多重部21と、IFFT(Inverse Fast Fourier Transform)部22と、CP(Cyclic Prefix)付加部23とを有する。受信部13は、CP除去部24と、FFT(Fast Fourier Transform)部25と、分離部26と、復調部27と、復号部28とを有する。制御部14は、切り替え制御部29と、スイッチ30と、パスロス推定部31と、パスロス送信制御部32と、送信電力決定部33と、制御信号生成部34と、参照信号生成部35とを有する。
図3は、実施例1の基地局の一例を示すブロック図である。図3において、基地局50は、無線部51と、受信部52と、送信部53と、制御部54とを有する。無線部51は、受信無線部55と、送信無線部56とを有する。受信部52は、CP除去部57と、FFT部58と、分離部59と、復調部60,61と、復号部62,63とを有する。送信部53は、符号化部64と、変調部65と、多重部66と、IFFT部67と、CP付加部68とを有する。制御部54は、パスロス情報抽出部69と、チャネル推定部70と、決定部71と、ウェイクアップメッセージ生成部72と、制御信号生成部73と、参照信号生成部74とを有する。
以上の構成を有する通信システム1の処理動作について説明する。図4は、実施例1の通信システムの処理動作の一例を示すシーケンス図である。ここでは、図1で示した第1のグループを例にとって説明する。
実施例1で図示した各部の各構成要素は、必ずしも物理的に図示の如く構成されていることを要しない。すなわち、各部の分散・統合の具体的形態は図示のものに限られず、その全部又は一部を、各種の負荷や使用状況等に応じて、任意の単位で機能的又は物理的に分散・統合して構成することができる。
10 通信端末
11,51 無線部
12,53 送信部
13,52 受信部
14,54 制御部
15,56 送信無線部
16,55 受信無線部
17,18,64 符号化部
19,20,65 変調部
21,66 多重部
22,67 IFFT部
23,68 CP付加部
24,57 CP除去部
25,58 FFT部
26,59 分離部
27,60,61 復調部
28,62,63 復号部
29 切り替え制御部
30 スイッチ
31 パスロス推定部
32 パスロス送信制御部
33 送信電力決定部
34,73 制御信号生成部
35,74 参照信号生成部
36 GPS処理部
50 基地局
69 パスロス情報抽出部
70 チャネル推定部
71 決定部
72 ウェイクアップメッセージ生成部
Claims (9)
- 複数の通信端末を含むグループと、基地局とを具備し、
前記グループの内の第1通信端末は、
前記第1通信端末と前記基地局との間のパスロスを推定する推定部と、
前記推定したパスロスに関する情報を前記基地局へ送信する送信部と、
を具備し、
前記基地局は、
前記第1通信端末から送信された前記パスロスに関する情報を受信する受信部と、
前記受信したパスロスに関する情報を、前記グループにおける前記第1通信端末以外の第2通信端末へ送信する送信部と、
を具備し、
前記第2通信端末は、
前記基地局から送信された前記パスロスに関する情報を受信する受信部と、
前記受信したパスロスに関する情報に基づいて、前記第2通信端末の送信電力を決定する決定部と、
を具備する、
ことを特徴とする通信システム。 - 前記第2通信端末は、動作モードとスリープモードとを有し、
前記基地局の前記送信部は、前記スリープモードである前記第2通信端末に対して、動作モードに切り替える制御信号と共に前記パスロスに関する情報を送信する、
ことを特徴とする請求項1に記載の通信システム。 - 前記基地局の前記送信部は、前記動作モードに切り替える制御信号と前記パスロスに関する情報を、前記第2通信端末への個別メッセージで送信する、
ことを特徴とする請求項2に記載の通信システム。 - 第1のグループに含まれる各第2通信端末と前記第1のグループの前記第1通信端末との距離は、第2のグループに含まれる各通信端末と前記第1グループの前記第1通信端末との距離よりも短い、
ことを特徴とする請求項1に記載の通信システム。 - 基地局から送信された、自身が属するグループにおける自身以外の第1通信端末と前記基地局との間のパスロスに関する情報を受信する受信部と、
前記受信したパスロスに関する情報に基づいて、自身の送信電力を決定する決定部と、
を具備することを特徴とする通信端末。 - 前記通信端末は、動作モードとスリープモードとを有し、
前記受信部は、前記パスロスに関する情報を、前記スリープモードから前記動作モードに切り替える制御信号と共に受信する、
ことを特徴とする請求項5に記載の通信端末。 - 複数の通信端末を含むグループの内の第1の通信端末から送信された、前記第1通信端末と自身との間のパスロスに関する情報を受信する受信部と、
前記受信したパスロスに関する情報を、前記グループにおける前記第1通信端末以外の第2通信端末へ送信する送信部と、
を具備することを特徴とする基地局。 - 前記送信部は、スリープモードである前記第2通信端末に対して、前記スリープモードから動作モードに切り替える制御信号と共に前記パスロスに関する情報を送信する、
ことを特徴とする請求項7に記載の基地局。 - 前記送信部は、前記制御信号と前記パスロスに関する情報を、前記第2通信端末への個別メッセージで送信する、
ことを特徴とする請求項8に記載の基地局。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020157026407A KR101696569B1 (ko) | 2013-04-04 | 2013-04-04 | 통신 시스템, 통신 단말기 및 기지국 |
PCT/JP2013/060398 WO2014162576A1 (ja) | 2013-04-04 | 2013-04-04 | 通信システム、通信端末、及び基地局 |
CN201380075170.XA CN105075320B (zh) | 2013-04-04 | 2013-04-04 | 通信系统、通信终端以及基站 |
JP2015509824A JP6288077B2 (ja) | 2013-04-04 | 2013-04-04 | 通信システム |
EP13881034.6A EP2983396B1 (en) | 2013-04-04 | 2013-04-04 | Communication system, communication terminal, and base station |
US14/869,255 US10425904B2 (en) | 2013-04-04 | 2015-09-29 | Communication system, communication terminal, and base station |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/JP2013/060398 WO2014162576A1 (ja) | 2013-04-04 | 2013-04-04 | 通信システム、通信端末、及び基地局 |
Related Child Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US14/869,255 Continuation US10425904B2 (en) | 2013-04-04 | 2015-09-29 | Communication system, communication terminal, and base station |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014162576A1 true WO2014162576A1 (ja) | 2014-10-09 |
Family
ID=51657904
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP2013/060398 WO2014162576A1 (ja) | 2013-04-04 | 2013-04-04 | 通信システム、通信端末、及び基地局 |
Country Status (6)
Country | Link |
---|---|
US (1) | US10425904B2 (ja) |
EP (1) | EP2983396B1 (ja) |
JP (1) | JP6288077B2 (ja) |
KR (1) | KR101696569B1 (ja) |
CN (1) | CN105075320B (ja) |
WO (1) | WO2014162576A1 (ja) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016076911A (ja) * | 2014-10-09 | 2016-05-12 | トヨタ自動車株式会社 | 無線通信装置および通信方法 |
WO2017037845A1 (ja) * | 2015-08-31 | 2017-03-09 | 日本電気株式会社 | ネットワークノードとネットワークシステムと端末、ネットワーク制御方法並びにプログラム |
JP2018506878A (ja) * | 2014-12-15 | 2018-03-08 | クゥアルコム・インコーポレイテッドQualcomm Incorporated | 適応型エネルギー検出を使用する無線アクセス技術の共存 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN106961721B (zh) * | 2016-01-11 | 2020-05-15 | 中兴通讯股份有限公司 | 一种实现上行功率控制的方法及终端 |
CN108632973B (zh) * | 2017-03-24 | 2021-08-31 | 上海诺基亚贝尔股份有限公司 | 用于在通信系统中控制功率的方法和设备 |
US11463963B2 (en) * | 2019-01-10 | 2022-10-04 | Qualcomm Incorporated | Path loss estimation |
US11432247B2 (en) | 2019-04-22 | 2022-08-30 | Cypress Semiconductor Corporation | Methods, systems and devices for varying wireless transmit power based on path loss information |
CN112449383A (zh) * | 2019-08-28 | 2021-03-05 | 索尼公司 | 用于无线通信系统的设备、方法和存储介质 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012085011A (ja) * | 2010-10-07 | 2012-04-26 | Sony Corp | 基地局、無線通信方法、および無線通信システム |
Family Cites Families (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101196670B1 (ko) * | 2005-09-16 | 2012-11-06 | 코닌클리케 필립스 일렉트로닉스 엔.브이. | 무선 통신 네트워크에서 디바이스를 클러스터링하는 방법 |
US20080188260A1 (en) * | 2007-02-02 | 2008-08-07 | Motorola, Inc. | Method and apparatus for uplink power control in a communication system |
US9072060B2 (en) * | 2008-06-03 | 2015-06-30 | Nokia Technologies Oy | Method, apparatus and computer program for power control to mitigate interference |
JP5573173B2 (ja) * | 2010-01-12 | 2014-08-20 | 住友電気工業株式会社 | 基地局装置 |
JP2013080986A (ja) * | 2010-02-12 | 2013-05-02 | Mitsubishi Electric Corp | 移動体通信システム |
JP5165709B2 (ja) * | 2010-02-25 | 2013-03-21 | 株式会社エヌ・ティ・ティ・ドコモ | 無線基地局装置及びスケジューリング方法 |
WO2011123755A1 (en) * | 2010-04-02 | 2011-10-06 | Interdigital Patent Holdings, Inc. | Group procedures for machine type communications devices |
JP2011250092A (ja) | 2010-05-26 | 2011-12-08 | Sony Corp | 無線通信装置、基地局、無線通信方法、および無線通信システム |
JP5569322B2 (ja) | 2010-10-07 | 2014-08-13 | ソニー株式会社 | 無線端末、無線通信方法、および無線通信システム |
EP2695450A4 (en) * | 2011-04-01 | 2014-09-10 | Intel Corp | UPLINK POWER CONTROL METHOD FOR RRH SYSTEMS DISTRIBUTED WITH THE SAME CELL ID |
-
2013
- 2013-04-04 CN CN201380075170.XA patent/CN105075320B/zh not_active Expired - Fee Related
- 2013-04-04 EP EP13881034.6A patent/EP2983396B1/en not_active Not-in-force
- 2013-04-04 KR KR1020157026407A patent/KR101696569B1/ko active IP Right Grant
- 2013-04-04 JP JP2015509824A patent/JP6288077B2/ja not_active Expired - Fee Related
- 2013-04-04 WO PCT/JP2013/060398 patent/WO2014162576A1/ja active Application Filing
-
2015
- 2015-09-29 US US14/869,255 patent/US10425904B2/en not_active Expired - Fee Related
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2012085011A (ja) * | 2010-10-07 | 2012-04-26 | Sony Corp | 基地局、無線通信方法、および無線通信システム |
Non-Patent Citations (11)
Title |
---|
"3GPP RAN1#66bis", article "Standards aspects impacting UE costs" |
"3GPP RAN1#66bisRl-112929", article "Standards aspects impacting UE costs" |
"Considerations on approaches for low-cost MTC UEs", 3GPP RAN1#66BIS |
"Considerations on approaches for low-cost MTC UEs", 3GPP RAN1#66BIS RL-112917 |
"Overview on low-cost MTC UEs based on LTE", 3GPP RAN1#66BIS |
"Overview on low-cost MTC UEs based on LTE", 3GPP RAN1#66BISR1-112912 |
"Proposed SID: Provision of low-cost MTC UEs based on LTE", 3GPP TSG RAN PLENARY # 53 |
"Proposed SID: Provision of low-cost MTC UEs based on LTE", 3GPP TSG RAN PLENARY # 53 RP-111112 |
"Study on provision of low-cost MTC UEs based on LTE", 3GPP TR 36.888 |
See also references of EP2983396A4 |
SHINKICHI IKEDA ET AL.: "Standardization activity on cellular-based Machine-to-Machine Communication", PANASONIC TECHNICAL JOURNAL, vol. 57, no. 1, 15 April 2011 (2011-04-15), pages 60 - 62, XP055228541 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2016076911A (ja) * | 2014-10-09 | 2016-05-12 | トヨタ自動車株式会社 | 無線通信装置および通信方法 |
JP2018506878A (ja) * | 2014-12-15 | 2018-03-08 | クゥアルコム・インコーポレイテッドQualcomm Incorporated | 適応型エネルギー検出を使用する無線アクセス技術の共存 |
WO2017037845A1 (ja) * | 2015-08-31 | 2017-03-09 | 日本電気株式会社 | ネットワークノードとネットワークシステムと端末、ネットワーク制御方法並びにプログラム |
JPWO2017037845A1 (ja) * | 2015-08-31 | 2018-06-14 | 日本電気株式会社 | ネットワークノードとネットワークシステムと端末、ネットワーク制御方法並びにプログラム |
Also Published As
Publication number | Publication date |
---|---|
KR20150121183A (ko) | 2015-10-28 |
EP2983396A4 (en) | 2016-02-10 |
JPWO2014162576A1 (ja) | 2017-02-16 |
JP6288077B2 (ja) | 2018-03-07 |
EP2983396A1 (en) | 2016-02-10 |
KR101696569B1 (ko) | 2017-01-23 |
EP2983396B1 (en) | 2017-05-24 |
US10425904B2 (en) | 2019-09-24 |
US20160021620A1 (en) | 2016-01-21 |
CN105075320A (zh) | 2015-11-18 |
CN105075320B (zh) | 2019-03-22 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP6288077B2 (ja) | 通信システム | |
JP2023062107A (ja) | ネットワークによって開始されるオンデマンドのゼロエネルギーページング方法および装置 | |
US20200367194A1 (en) | Combined wake-up signal for multiple paging occasions | |
CN107197521B (zh) | 物理共享信道参数的确定机制以及基站和用户设备 | |
US20230345392A1 (en) | Method and Apparatus for using Indication Information of Time Domain Resource Allocation | |
US20190159179A1 (en) | Base station, user equipment, and related method | |
AU2013297445B2 (en) | Terminal, base station, communication method and integrated circuit | |
US9998986B2 (en) | Method for transmitting communication signals in a wireless communication system | |
WO2019070187A1 (en) | METHOD, APPARATUS, AND COMPUTER-READABLE MEDIUM FOR ENHANCED DECODING OF NARROWBAND MASTER INFORMATION BLOCKS (MIB-NB) | |
EP2982186A1 (en) | Method for controlling network access points | |
CN113316236B (zh) | 寻呼处理方法、装置、设备及存储介质 | |
EP3925323A1 (en) | Methods to configure neighbor cell resynchronization signal (rss) parameters | |
KR20220108042A (ko) | 단말 장치, 기지국 장치 및 통신 방법 | |
WO2020229547A1 (en) | Wus signal design | |
CN111919480B (zh) | 资源调度方法、数据发送方法及其装置、通信系统 | |
WO2023051677A1 (zh) | 由用户设备执行的方法以及用户设备 | |
EP3120618A1 (en) | Network node, wireless device and method performed therein | |
CN103326964B (zh) | 一种实现数据解调的方法、装置和系统 | |
WO2014155638A1 (ja) | 通信端末及び基地局 | |
JP6090432B2 (ja) | 通信システム、移動局、基地局、及びセル検出方法 | |
KR20170055929A (ko) | 무선통신 시스템에서의 신호 송수신 방법 및 장치 |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
WWE | Wipo information: entry into national phase |
Ref document number: 201380075170.X Country of ref document: CN |
|
121 | Ep: the epo has been informed by wipo that ep was designated in this application |
Ref document number: 13881034 Country of ref document: EP Kind code of ref document: A1 |
|
ENP | Entry into the national phase |
Ref document number: 2015509824 Country of ref document: JP Kind code of ref document: A |
|
ENP | Entry into the national phase |
Ref document number: 20157026407 Country of ref document: KR Kind code of ref document: A |
|
REEP | Request for entry into the european phase |
Ref document number: 2013881034 Country of ref document: EP |
|
WWE | Wipo information: entry into national phase |
Ref document number: 2013881034 Country of ref document: EP |
|
NENP | Non-entry into the national phase |
Ref country code: DE |