WO2013161084A1 - Base station device, mobile station device, and communication method - Google Patents

Base station device, mobile station device, and communication method Download PDF

Info

Publication number
WO2013161084A1
WO2013161084A1 PCT/JP2012/061457 JP2012061457W WO2013161084A1 WO 2013161084 A1 WO2013161084 A1 WO 2013161084A1 JP 2012061457 W JP2012061457 W JP 2012061457W WO 2013161084 A1 WO2013161084 A1 WO 2013161084A1
Authority
WO
WIPO (PCT)
Prior art keywords
communication
period
mobile station
base station
station apparatus
Prior art date
Application number
PCT/JP2012/061457
Other languages
French (fr)
Japanese (ja)
Inventor
田島　喜晴
田中　良紀
好明 太田
勝正 杉山
Original Assignee
富士通株式会社
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 富士通株式会社 filed Critical 富士通株式会社
Priority to PCT/JP2012/061457 priority Critical patent/WO2013161084A1/en
Publication of WO2013161084A1 publication Critical patent/WO2013161084A1/en

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
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0212—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave
    • H04W52/0216—Power saving arrangements in terminal devices managed by the network, e.g. network or access point is master and terminal is slave using a pre-established activity schedule, e.g. traffic indication frame
    • 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
    • H04W52/02—Power saving arrangements
    • H04W52/0209—Power saving arrangements in terminal devices
    • H04W52/0225—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal
    • H04W52/0245—Power saving arrangements in terminal devices using monitoring of external events, e.g. the presence of a signal according to signal strength
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00—Reducing energy consumption in communication networks
    • Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the embodiments discussed herein relate to intermittent communication in mobile communications.
  • a technique related to intermittent communication in wireless communication it is known to determine a section in which intermittent operation is performed by hierarchically combining a plurality of DRX (discontinuous reception) periods having different lengths.
  • the upper DRX of the hierarchy has a longer period than the lower DRX.
  • the section using the latest lower DRX period is determined.
  • the intermittent operation of the communication processing unit is controlled based on the information regarding the DRX cycle.
  • a method and an apparatus for performing measurement by a terminal in a mobile communication system are provided.
  • the terminal has a discontinuous reception mode (DRX) and a continuous reception mode.
  • the mobile communication system includes a serving cell in which a terminal is located and an adjacent cell located adjacent to the serving cell.
  • the signal strength of the serving cell is measured according to the DRX mode period. If the measured signal strength of the serving cell is less than or equal to a certain threshold, the signal strength measurement is performed continuously. On the other hand, if the measured signal strength of the serving cell is greater than the specific threshold, the continuous signal strength measurement is stopped, and the signal strength of the serving cell is measured according to the period of the DRX mode.
  • intermittent communication When intermittent communication is performed in mobile communication, if the intermittent cycle is made longer, the period for supplying power to the communication circuit of the mobile station apparatus can be reduced, so that power consumption can be further reduced. However, if the intermittent period is longer, the communication possible period per unit time is reduced, thereby reducing the throughput.
  • An object of the apparatus and method disclosed in this specification is to alleviate a decrease in throughput due to a decrease in a communicable period in intermittent communication.
  • a base station device includes a communication unit that performs wireless communication with the mobile station device, and a communication control unit.
  • the communication control unit is configured such that the communication unit performs discontinuous communication with the mobile station device in the first intermittent cycle, and is shorter than the first intermittent cycle for each repetition cycle determined separately from the first intermittent cycle.
  • the communication timing with the mobile station apparatus is controlled so as to perform discontinuous communication with the mobile station apparatus at intermittent intervals.
  • a mobile station device includes a communication unit that performs wireless communication with the base station device, and a communication control unit.
  • the communication control unit is configured such that the communication unit performs discontinuous communication with the base station device in the first intermittent cycle and is shorter than the first intermittent cycle for each repetition cycle determined separately from the first intermittent cycle.
  • the communication timing with the base station apparatus is controlled so as to perform discontinuous communication with the base station apparatus at intermittent intervals.
  • a radio communication system having a base station apparatus and a mobile station apparatus communicating with the base station apparatus.
  • the base station device includes a first communication unit that performs wireless communication with the mobile station device, and a communication control unit.
  • the communication control unit is configured such that the communication unit performs discontinuous communication with the mobile station device in the first intermittent cycle, and is shorter than the first intermittent cycle for each repetition cycle determined separately from the first intermittent cycle.
  • the communication timing with the mobile station apparatus is controlled so as to perform discontinuous communication with the mobile station apparatus at intermittent intervals.
  • the mobile station apparatus includes a second communication unit that performs wireless communication with the base station apparatus in the first intermittent period and the second intermittent period.
  • a communication method performs discontinuous communication with a first intermittent cycle and performs discontinuous communication with a second intermittent cycle shorter than the first intermittent cycle for each repetition cycle determined independently of the first intermittent cycle. As described above, it includes setting a communication permission period between the base station apparatus and the mobile station apparatus. The communication method includes causing the base station apparatus and the mobile station apparatus to perform wireless communication in the set communication permission period.
  • a communication method used in a radio communication system having a base station apparatus and a mobile station apparatus communicating with the base station apparatus.
  • the base station apparatus performs discontinuous communication with the mobile station apparatus at the first intermittent period, and moves at a second intermittent period shorter than the first intermittent period at every repetition period determined separately from the first intermittent period.
  • the communication timing with the mobile station apparatus is controlled so as to perform discontinuous communication with the station apparatus, and the mobile station apparatus performs wireless communication with the base station apparatus in the first intermittent period and the second intermittent period.
  • a decrease in throughput due to a decrease in a communicable period in intermittent communication is mitigated.
  • Example of intermittent communication> In the following description, an example in which the base station apparatus performs discontinuous transmission and the mobile station apparatus performs discontinuous reception may be used. However, a similar intermittent communication period may be set when the mobile station apparatus performs discontinuous transmission and the base station apparatus performs discontinuous reception.
  • the mobile station apparatus and the base station apparatus may be simply referred to as “mobile station” and “base station”.
  • the mobile station is allowed to perform reception operations in the periods indicated by reference numerals 1a to 1c and the periods indicated by reference numerals 2a to 2p, and discontinuous reception operations by stopping reception operations in other periods. That is, intermittent reception is performed.
  • the base station is allowed to perform a transmission operation in a period denoted by reference numerals 1a to 1c and a period denoted by reference numerals 2a to 2p, and discontinuous transmission by stopping transmission operations in other periods. Transmission operation, that is, intermittent transmission is performed.
  • a period given reference numerals 1a to 1c is referred to as a “first communication period”.
  • the first communication period is intermittently repeated at the first intermittent period T1.
  • a period given reference numerals 2a to 2p is referred to as a “second communication period”.
  • the second communication period occurs during the repetitive communication period that repeatedly arrives at the repetitive cycle Tr, and does not occur in the remaining period of the gap between the repetitive communication periods.
  • the second communication period is intermittently repeated at a second intermittent period T2 shorter than the first intermittent period T1 in the repeated communication period.
  • the base station sets the length of the repetition period Tr regardless of the length of the first intermittent period T1, which is the generation period of the first communication period. For this reason, the difference between the first communication period and the second communication period changes with time, and the second communication period occurs at any time in the gap between the first communication periods.
  • a period ⁇ 1 from the first communication period 1a to the second communication period 2a following this is different from a period ⁇ 3 from the first communication period 1b to the subsequent second communication period 2i.
  • a period ⁇ 2 until the first communication period 1b and the second communication period 2h immediately before it is different from a period ⁇ 4 until the first communication period 1c and the second communication period 2o immediately before it.
  • the first intermittent period T1 is lengthened by providing a second communication period that repeats at a relatively short second intermittent period T2 in the gap between the first communication periods that repeat at the first intermittent period T1, the first communication periods Can be transmitted earlier than the arrival time of the next first communication period. For this reason, even if the first intermittent period T1 becomes longer and the communicable period per unit time is reduced, it is possible to mitigate a decrease in throughput due to a traffic transmission delay.
  • FIG. 2 shows an example of a communication period when the difference between the first communication period and the second communication period does not change with time.
  • the period from the first communication period to the subsequent second communication period is always the same period ⁇ 1.
  • the period from the first communication period to the second communication period immediately before is always the same period ⁇ 3.
  • traffic is not transmitted in the second communication period, so there is a possibility that the transmission delay is always longer than in other periods.
  • the time period during which no traffic is constantly transmitted in the second communication period is fixed in the gap of the first communication period. Can be prevented. As a result, it is possible to prevent the occurrence of a time zone in which the transmission delay is always longer than the others in the gap between the first communication periods.
  • FIG. 3 is a diagram illustrating an example of the overall configuration of the communication system.
  • the communication system 10 includes an access network 11, base stations 12a to 12c, a mobile station 13, an access gateway device 14, and a core network 15.
  • the communication system 10 may be, for example, an LTE (Long Term Evolution) mobile communication system studied by 3GPP (Third Generation Partnership Project).
  • the apparatus and method disclosed in this specification can be applied to other mobile communication systems as long as they are cellular mobile communication systems that support intermittent transmission / reception operations such as DRX and DTX (discontinuous transmission). It is.
  • the access gateway device may be referred to as “AGW”.
  • the base stations 12a to 12c may be collectively referred to as “base station 12”.
  • the base station 12 forms the access network 11 and relays communication between the mobile station 13 of the user who receives the mobile communication service and the wired communication network on the ground side in accordance with a predetermined wireless communication standard.
  • the core network 15 is connected to a public network such as a telephone network or the Internet, and connection processing and data transfer between the mobile station 13 and these public networks are performed in the core network 15.
  • the base station 12 and the access network 11 are connected to the core network 15 via the AGW 14.
  • the base station 12 includes a processor 20, a storage device 21, a baseband processing circuit 22, a radio frequency signal processing circuit 23, and a network interface circuit 24.
  • the baseband, the radio frequency, and the network interface may be expressed as “BB”, “RF”, and “NIF”, respectively.
  • the processor 20 performs user management processing other than the processing performed by the following BB processing circuit 22 and operation control of the base station 3.
  • the storage device 21 stores a control program for information processing by the processor 20. Each data and temporary data used during the execution of these programs are also stored in the storage device 21.
  • the BB processing circuit 22 performs processing of BB signals related to encoding and modulation of signals transmitted and received between the mobile station 13 and the base station 12, demodulation and decoding, communication protocol processing, and scheduling.
  • the BB processing circuit 22 may include a processor for signal processing and a memory for storing programs and data used for the operation of the processor.
  • the processor may be, for example, a DSP (digital signal processor) or a CPU (Central processing unit).
  • the BB processing circuit 22 may include logic circuits such as LSI (large scale integration), ASIC (Application Specific Integrated Circuit), and FPGA (Field-Programming Gate Array) for signal processing.
  • the RF signal processing circuit 23 performs digital-analog conversion, analog-digital conversion, frequency conversion, signal amplification, and filtering of a radio signal transmitted / received between the mobile station 13 and the base station 12.
  • the NIF circuit 24 performs signal processing for transmission and reception of signals with other base stations and the AGW 14 via the access network 11.
  • the mobile station 13 includes a processor 30, a storage device 31, a BB processing circuit 32, and an RF signal processing circuit 33.
  • the processor 30 executes operation control of the mobile station 13 other than the following processing performed by the BB processing circuit 32 and an application program for processing user data.
  • the storage device 31 stores an application program for information processing by the processor 30. Each data and temporary data used during the execution of these programs are also stored in the storage device 31.
  • the BB processing circuit 32 performs processing of BB signals related to encoding and modulation of signals transmitted and received between the mobile station 13 and the base station 12, demodulation and decoding, communication protocol processing, and scheduling.
  • the BB processing circuit 32 may include a processor for signal processing and a memory for storing programs and data used for the operation of the processor.
  • the processor may be a DSP or a CPU, for example.
  • the BB processing circuit 32 may include a logic circuit such as an LSI, ASIC, or FPGA for signal processing.
  • the RF signal processing circuit 33 performs signal processing such as digital-analog conversion, analog-digital conversion, frequency conversion, signal amplification, and filtering of radio signals transmitted and received between the mobile station 13 and the base station 12.
  • signal processing such as digital-analog conversion, analog-digital conversion, frequency conversion, signal amplification, and filtering of radio signals transmitted and received between the mobile station 13 and the base station 12.
  • FIGS. 4 and 5 are merely examples for explaining the embodiments. As long as the operation described below is executed, the communication system described in this specification may adopt any other hardware configuration.
  • FIG. 6 is a diagram illustrating a first example of a functional configuration of the base station 12.
  • the base station 12 includes a wireless communication unit 40, a network communication unit 41, a data processing unit 42, and a control unit 43.
  • the wireless communication unit 40 performs transmission / reception processing, encoding processing, decoding processing, modulation processing, and demodulation processing of control signals and user traffic wireless signals transmitted and received between the base station 12 and the mobile station 13.
  • the network communication unit 41 is an interface between the base station 12 and the access network 11, and transmits / receives packets to / from the access network 11.
  • the data processing unit 42 processes communication data transmitted / received between the base station 12 and the mobile station 13, that is, user traffic.
  • the control unit 43 controls the mobile station 13 such as radio resource control (RRC: “Radio Resource Control”), communication protocol processing, scheduling processing, call control processing, user management processing, and control of intermittent communication performed with the mobile station 13.
  • RRC radio resource control
  • Control of wireless communication with The control unit 43 includes an intermittent operation control unit 50 and a control signal transmission unit 51.
  • radio resource control may be referred to as “RRC”.
  • the intermittent operation control unit 50 controls the intermittent communication operation performed with the mobile station 13.
  • the intermittent operation control unit 50 includes a first timer 52, a second timer 53, a communication timing setting unit 54, and a transmission timing control unit 55.
  • the first timer 52 detects the start and end of the first communication period.
  • the second timer 53 detects the start and end of the second communication period.
  • the first timer 52 and the second timer 53 notify the transmission timing control unit 55 of the start and end of the first communication period and the second communication period.
  • the communication time setting unit 54 sets, in the first timer 52, information on the first intermittent period T1 and the start time of the intermittent communication operation that are used to detect the start and end of the first communication period. Further, the communication timing setting unit 54 sets, in the second timer 53, information on the second intermittent period T2, the repetition period Tr, and the start time of the intermittent communication operation that are used to detect the start and end of the second communication period. .
  • the transmission timing control unit 55 inquires of the data processing unit 42 whether there is downlink data to be transmitted to the mobile station 13. When there is downlink data, the transmission timing control unit 55 notifies that the downlink data is transmitted via the PDCCH (Physical Downlink Control Channel) during either the first communication period or the second communication period. Is transmitted to the mobile station 13. The transmission timing control unit 55 instructs the data processing unit 42 to output downlink data during either the first communication period or the second communication period, and transmits the downlink data to the mobile station 13.
  • PDCCH Physical Downlink Control Channel
  • the control signal transmission unit 51 transmits information about the first intermittent cycle T1, the second intermittent cycle T2, the repetition cycle Tr, and the start time of the intermittent communication operation to the mobile station 13 through the RRC signal link.
  • information on the first intermittent cycle T1, the second intermittent cycle T2, the repetition cycle Tr, and the start time of the intermittent communication operation may be referred to as “setting information”.
  • the above-described operation of the wireless communication unit 40 is executed by the cooperation of the processor 20, the BB processing circuit 22, and the RF signal processing circuit 23 shown in FIG.
  • the above operation of the network communication unit 41 is executed by the NIF circuit 24.
  • the operations of the data processing unit 42 and the intermittent operation control unit 50 are executed by the processor 20.
  • the operation of the control signal transmission unit 51 is executed by the processor 20 and the BB processing circuit 22.
  • FIG. 7 is a diagram illustrating an example of a functional configuration of the mobile station 13.
  • the mobile station 13 includes a wireless communication unit 60, a data processing unit 61, and a control unit 62.
  • the wireless communication unit 60 performs transmission / reception processing, encoding processing, decoding processing, modulation processing, and demodulation processing of control signals and user traffic wireless signals transmitted and received between the base station 12 and the mobile station 13.
  • the data processing unit 61 processes communication data transmitted / received between the base station 12 and the mobile station 13.
  • the control unit 62 controls wireless communication with the base station 12 such as wireless resource control, communication protocol processing, call processing control, and intermittent communication control performed by the mobile station 13.
  • the control unit 62 includes an intermittent operation control unit 70 and a control signal receiving unit 71.
  • the intermittent operation control unit 70 controls the intermittent communication operation performed by the mobile station 13.
  • the control signal receiving unit 71 receives setting information transmitted from the base station 12 through the RRC signal link.
  • the intermittent operation control unit 70 includes a first timer 72, a second timer 73, a communication time setting unit 74, and a communication time control unit 75.
  • the first timer 72 detects the start and end of the first communication period.
  • the second timer 73 detects the start and end of the second communication period.
  • the first timer 72 and the second timer 73 notify the communication timing control unit 75 of the start and end of the first communication period and the second communication period.
  • the communication time setting unit 74 acquires setting information from the control signal receiving unit 71.
  • the communication timing setting unit 74 sets information on the first intermittent cycle T1 and the start time of the intermittent communication operation in the first timer 72.
  • the communication timing setting unit 74 sets information on the second intermittent period T2, the repetition period Tr, and the start time of the intermittent communication operation in the second timer 73.
  • the communication timing control unit 75 operates the reception function and the transmission function of the wireless communication unit 60 during the first communication period and the second communication period.
  • the radio communication unit 60 determines whether there is downlink data to be transmitted to the mobile station 13 by receiving the PDCCH, and if there is downlink data, receives it.
  • the communication timing control unit 75 inquires of the data processing unit 61 whether there is uplink data scheduled to be transmitted to the base station 12.
  • the control unit 62 transmits a scheduling request to the base station 12 via PUCCH (Physical-Uplink-Control-Channel) during either the first communication period or the second communication period.
  • PUCCH Physical-Uplink-Control-Channel
  • the transmission timing control unit 55 instructs the data processing unit 61 to output uplink data during either the first communication period or the second communication period. Then, uplink data is transmitted to the base station 12.
  • the operation of the wireless communication unit 60 is executed by the cooperation of the processor 30, the BB processing circuit 32, and the RF signal processing circuit 33 shown in FIG.
  • the operations of the data processing unit 61 and the intermittent operation control unit 70 are executed by the processor 30.
  • the operation of the control signal receiving unit 71 is executed by the processor 30 and the BB processing circuit 32.
  • FIGS. 6 and 7 mainly illustrate configurations related to the functions of the base station 12 and the mobile station 13 described in this specification.
  • the base station 12 and the mobile station 13 may include other components than the illustrated components. The same applies to FIGS. 10 and 12.
  • FIG. 8 is a diagram illustrating a first example of the operation of the base station 12.
  • a series of operations described with reference to FIG. 8 may be interpreted as a method including a plurality of procedures. In this case, “operation” may be read as “step”.
  • the operations shown in FIGS. 9, 11 and 13 are the same.
  • control unit 43 establishes an RRC connection with the mobile station 13.
  • the communication timing setting unit 54 sets the second communication period by setting the second intermittent period T2 and the repetition period Tr in the second timer 53.
  • control signal transmission unit 51 transmits the setting information to the mobile station 13.
  • the transmission timing control unit 55 determines whether the current communication period is the first communication period. When the current time is the first communication period (operation AD: Y), the operation proceeds to operation AF. If the current time is not the first communication period (operation AD: N), the operation proceeds to operation AE. In operation AE, the transmission timing control unit 55 determines whether or not the present time is the second communication period. When the current time is the second communication period (operation AE: Y), the operation proceeds to operation AF. If the current time is not the second communication period (operation AE: N), the operation proceeds to operation AG.
  • the transmission timing control unit 55 determines whether there is downlink data to be transmitted to the mobile station 13. When there is downlink data, the transmission timing control unit 55 transmits PDCCH and downlink data.
  • the radio communication unit 40 receives uplink data from the mobile station 13.
  • the control unit 43 determines whether the RRC connection with the mobile station 13 is disconnected or whether the mobile station 13 enters a standby state. The operation ends when the RRC connection is disconnected or the mobile station 13 enters a standby state (operation AG: Y). When the RRC connection is maintained and the mobile station 13 does not enter the standby state (operation AG: N), the operation returns to operation AD.
  • FIG. 9 is a diagram illustrating an example of the operation of the mobile station 13.
  • the control unit 62 establishes an RRC connection with the mobile station 13.
  • the control signal receiving unit 71 receives setting information transmitted from the base station 12.
  • the communication time setting unit 74 sets the setting information in the first timer 72 and the second timer 73.
  • operation BC the communication timing control unit 75 determines whether the current communication period is the first communication period. If the current time is the first communication period (operation BC: Y), the operation proceeds to operation BE. If the current time is not the first communication period (operation BC: N), the operation proceeds to operation BD. In operation BD, the communication timing control unit 75 determines whether or not the current time is the second communication period. If the current time is the second communication period (operation BD: Y), the operation proceeds to operation BE. If the current time is not the second communication period (operation BD: N), the operation proceeds to operation BJ.
  • operation BE the reception function and transmission function of the wireless communication unit 60 are activated.
  • the radio communication unit 60 receives the PDCCH.
  • operation BF the radio communication unit 60 determines whether there is downlink data to be transmitted to the mobile station 13. If there is downlink data (operation BF: Y), the operation proceeds to operation BG. If there is no downlink data (operation BF: N), the operation proceeds to operation BH.
  • operation BG the wireless communication unit 60 receives downlink data.
  • operation BH the communication timing control unit 75 determines whether there is uplink data scheduled to be transmitted to the base station 12. When there is uplink data (operation BH: Y), the operation proceeds to operation BI. If there is no uplink data (operation BH: N), the operation proceeds to operation BJ.
  • control unit 62 transmits a scheduling request to the base station 12.
  • the transmission timing control unit 55 transmits downlink data.
  • the control unit 62 determines whether the RRC connection with the base station 12 is disconnected or whether the mobile station 13 enters a standby state. When the RRC connection is disconnected or the mobile station 13 enters a standby state, the operation ends. If the RRC connection is maintained and the mobile station 13 does not enter the standby state, the operation returns to operation BC.
  • the repetition period Tr is set independently of the first intermittent period T1
  • the difference between the first communication period and the second communication period changes with time.
  • the base station 12 performs both transmission and reception to the mobile station 13 in the same period.
  • the mobile station 13 performed both transmission and reception in the same period.
  • transmission and reception may occur in separate periods.
  • the timing for performing intermittent reception and the timing for performing intermittent transmission may be controlled independently of each other.
  • the base station 12 of this embodiment determines the repetition period Tr according to the mode of wireless communication between the base station 12 and the mobile station 13. For example, the base station 12 determines according to the generation period of communication between the base station 12 and the mobile station 13. For example, the repetition period Tr is determined according to the generation period of communication by the application program used in the mobile station 13.
  • the incoming e-mail confirmation is set, for example, every 5 minutes or every 10 minutes. In this embodiment, the repetition period Tr is set in accordance with the setting of such an application program.
  • FIG. 10 is a diagram illustrating a second example of the functional configuration of the base station 12. Components similar to those shown in FIG. 6 are given the same reference numerals as those used in FIG. 6, and descriptions of the same functions are omitted.
  • the intermittent operation control unit 50 includes a history acquisition unit 56.
  • the history acquisition unit 56 acquires an occurrence history of communication between the base station 12 and the mobile station 13. For example, the history acquisition unit 56 acquires transmission history of downlink data flowing on the PDCCH, transmission history such as uplink scheduling grant. The history acquisition unit 56 calculates the generation cycle of communication between the base station 12 and the mobile station 13 based on the communication history of these signals. The communication time setting unit 54 determines the repetition cycle Tr based on the communication generation cycle calculated by the history acquisition unit 56.
  • FIG. 11 is a diagram illustrating a second example of the operation of the base station 12.
  • the control unit 43 establishes an RRC connection with the mobile station 13.
  • the history acquisition unit 56 collects the occurrence history of communication between the base station 12 and the mobile station 13.
  • the history acquisition unit 56 calculates the occurrence period of communication between the base station 12 and the mobile station 13 based on the occurrence history of communication.
  • the communication time setting unit 54 determines the repetition cycle Tr based on the communication occurrence cycle calculated by the history acquisition unit 56.
  • the communication time setting unit 54 sets the second communication period by setting the second intermittent period T2 and the repetition period Tr in the second timer 53.
  • the operations CD to CH are the same as the operations AC to AG in FIG.
  • the repetition period Tr is determined based on the occurrence history of communication between the base station 12 and the mobile station 13, so that the occurrence time of the second communication period is determined between the base station 12 and the mobile station 13. It becomes possible to match with the time of occurrence of communication during the period. As a result, communication data between the base station 12 and the mobile station 13 can be transmitted quickly, and transmission delay is reduced. For this reason, it is possible to mitigate a decrease in throughput due to the extension of the intermittent period T1 of the first communication period.
  • the second communication period by repeating the second communication period at the second intermittent period T2 shorter than the first intermittent period T1, even if the communication data generation time is delayed from the second communication period, the data is transmitted in the subsequent second communication period. It can be sent promptly. For this reason, even if there are fluctuations in the generation period of communication data and errors in calculating the repetition period Tr, it is possible to reduce the chance that transmission in the second communication period fails and transmission is delayed until the next first communication period.
  • the communication period in the application program may be arbitrarily set by the user every 5 minutes or every 10 minutes, but the setting value of the repetition period of the intermittent operation should be determined using a power of 2 value. There is. For this reason, a difference may occur between the actual communication data generation period and the set value of the repetition period Tr. According to the present embodiment, it can be expected that communication data is transmitted in any of the plurality of second communication periods even if there is such an error in the value of the repetition period Tr.
  • the setting of the generation cycle of communication by this program is received from an application program in which communication data is transmitted by wireless communication between the base station 12 and the mobile station 13.
  • the base station 12 inquires about the setting of the communication cycle by the program from the application program that operates in the mobile station 13 or the application program that operates in the server device that communicates with the mobile station 13.
  • FIG. 12 is a diagram illustrating a third example of the functional configuration of the base station 12. Components similar to those shown in FIG. 6 are given the same reference numerals as those used in FIG. 6, and descriptions of the same functions are omitted.
  • the intermittent operation control unit 50 includes a period information acquisition unit 57.
  • the period information acquisition unit 57 inquires of an application program that operates on the mobile station 13, for example, an e-mail application program, for the communication period setting.
  • the cycle information acquisition unit 57 inquires the application program operating on the server device about the communication cycle setting. To do.
  • the communication time setting unit 54 determines the repetition cycle Tr based on the application program settings acquired by the cycle information acquisition unit 57.
  • FIG. 13 is a diagram illustrating a third example of the operation of the base station 12.
  • the control unit 43 establishes an RRC connection with the mobile station 13.
  • the control signal transmission unit 51 transmits setting information including information on the first intermittent period T1 and the start time of the intermittent communication operation to the mobile station 13.
  • the transmission timing control unit 55 determines whether the current communication period is the first communication period. When the current communication period is the first communication period (operation DC: Y), the operation proceeds to operation DF. If the current time is not the first communication period (operation DC: N), the operation proceeds to operation DD.
  • the transmission timing control unit 55 determines whether or not the second communication period for the second timer 53 has been set. When the setting of the second communication period is completed (operation DE: Y), the operation proceeds to operation DE. If the setting of the second communication period has not been completed (operation DE: N), the operation proceeds to operation DG.
  • operation DE the transmission timing control unit 55 determines whether the current communication period is the second communication period. If the current communication period is the second communication period (operation DE: Y), the operation proceeds to operation DF. If the current time is not the second communication period (operation DE: N), the operation proceeds to operation DJ.
  • operation DF the transmission timing control unit 55 transmits the PDCCH and the downlink data when there is downlink data to be transmitted to the mobile station 13. The radio communication unit 40 receives uplink data from the mobile station 13. Thereafter, the operation proceeds to operation DJ.
  • the period information acquisition unit 57 inquires the application program in which communication data is transmitted between the base station 12 and the mobile station 13 about the setting of the communication generation period.
  • the communication time setting unit 54 determines the repetition cycle Tr based on the setting of the application program acquired by the cycle information acquisition unit 57.
  • the communication time setting unit 54 sets the second communication period by setting the second intermittent period T2 and the repetition period Tr in the second timer 53.
  • the control signal transmission unit 51 transmits setting information including information on the second intermittent period T2, the repetition period Tr, and the start time of the intermittent communication operation to the mobile station 13.
  • operation DJ it is determined whether the RRC connection with the mobile station 13 is disconnected or whether the mobile station 13 is in a standby state. The operation ends when the RRC connection is disconnected or the mobile station 13 enters a standby state (operation DJ: Y). When the RRC connection is maintained and the mobile station 13 does not enter the standby state (operation DJ: N), the operation returns to operation DC.
  • the present embodiment it is possible to match the generation time of the second communication period with the generation time of communication between the base station 12 and the mobile station 13. As a result, the transmission delay of the communication data between the base station 12 and the mobile station 13 is reduced, and it is possible to mitigate the decrease in throughput due to the extension of the intermittent period T1 in the first communication period.
  • the said period information acquisition part 57 acquired the setting of the communication period from the application program in which communication data are transmitted between the base station 12 and the mobile station 13.
  • the period information acquisition unit 57 may specify an application program in which communication data is transmitted between the base station 12 and the mobile station 13.
  • the period information acquisition unit 57 specifies an application that transmits this packet from the header information of the packet transmitted between the base station 12 and the mobile station 13.
  • the cycle information acquisition unit 57 may acquire the communication cycle of the identified application from a database that stores a typical communication cycle for each application.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A base station device (12) is provided with: a communication unit (40) for communicating wirelessly with a mobile station device (13); and a communication controller (50) for controlling the time period of communication with the mobile station device (13) such that the communication unit (40) discontinuously communicates with the mobile station device (13) in accordance with a first intermission cycle, and, for each successive cycle determined separately from the first intermission cycle, discontinuously communicates with the mobile station device (13) in accordance with a second intermission cycle which is shorter than the first intermission cycle.

Description

基地局装置、移動局装置及び通信方法Base station apparatus, mobile station apparatus and communication method
　本明細書で論じられる実施態様は、移動体通信における間欠通信に関する。 The embodiments discussed herein relate to intermittent communication in mobile communications.
　無線通信における間欠通信に関する技術として、長さの異なる複数のＤＲＸ（discontinuous reception）の周期を階層的に組み合わせて間欠動作する区間を決定することが知られている。階層の上位のＤＲＸは、下位のＤＲＸよりも長い周期を持つ。上位のＤＲＸの周期に関する情報に基づいて、直近下位のＤＲＸの周期を用いる区間が決定される。また、最も下位のＤＲＸの周期に関する情報を用いる区間では、当該ＤＲＸの周期に関する情報に基づいて、通信処理部の間欠動作が制御される。 As a technique related to intermittent communication in wireless communication, it is known to determine a section in which intermittent operation is performed by hierarchically combining a plurality of DRX (discontinuous reception) periods having different lengths. The upper DRX of the hierarchy has a longer period than the lower DRX. Based on the information on the period of the upper DRX, the section using the latest lower DRX period is determined. Further, in the section using the information regarding the lowest DRX cycle, the intermittent operation of the communication processing unit is controlled based on the information regarding the DRX cycle.
　関連する他の技術として、移動通信システムにおける端末機が測定を実行する方法及び装置が提供されている。端末機は、不連続受信モード（ＤＲＸ）と連続受信モードとを有する。また、移動通信システムは、端末機が位置したサービングセルと上記サービングセルと隣接して位置した隣接セルとを有する。上記サービングセルの信号強度は、ＤＲＸモードの周期に従って測定される。上記測定されたサービングセルの信号強度が特定の閾値より小さいか又は同一である場合、上記信号強度測定は、連続的に実行される。他方、上記測定されたサービングセルの信号強度が上記特定の閾値より大きい場合、上記連続的な信号強度測定は中止され、上記サービングセルの信号強度は、上記ＤＲＸモードの周期に従って測定される。 As another related technique, a method and an apparatus for performing measurement by a terminal in a mobile communication system are provided. The terminal has a discontinuous reception mode (DRX) and a continuous reception mode. In addition, the mobile communication system includes a serving cell in which a terminal is located and an adjacent cell located adjacent to the serving cell. The signal strength of the serving cell is measured according to the DRX mode period. If the measured signal strength of the serving cell is less than or equal to a certain threshold, the signal strength measurement is performed continuously. On the other hand, if the measured signal strength of the serving cell is greater than the specific threshold, the continuous signal strength measurement is stopped, and the signal strength of the serving cell is measured according to the period of the DRX mode.
特開２０１２－０１０２０２号公報JP 2012-010202 A 特表２０１０－５１２０９８号公報Special table 2010-512098
　移動体通信において間欠通信を行う場合、間欠周期をより長くすれば移動局装置の通信回路に電源を供給する期間を低減できるため、消費電力をより低減することが可能である。しかし、間欠周期がより長くなれば単位時間あたりの通信可能期間が減少することによりスループットが低下する。 When intermittent communication is performed in mobile communication, if the intermittent cycle is made longer, the period for supplying power to the communication circuit of the mobile station apparatus can be reduced, so that power consumption can be further reduced. However, if the intermittent period is longer, the communication possible period per unit time is reduced, thereby reducing the throughput.
　本明細書に開示される装置及び方法は、間欠通信における通信可能期間の減少に伴うスループット低下を緩和することを目的とする。 An object of the apparatus and method disclosed in this specification is to alleviate a decrease in throughput due to a decrease in a communicable period in intermittent communication.
　装置の一観点によれば、基地局装置が与えられる。基地局装置は、移動局装置との無線通信を行う通信部と、通信制御部を備える。通信制御部は、通信部が、第１間欠周期で移動局装置と不連続な通信を行い、かつ第１間欠周期とは別に定められた繰り返し周期毎に、第１間欠周期よりも短い第２間欠周期で移動局装置と不連続な通信を行うように、移動局装置との通信時期を制御する。 According to one aspect of the device, a base station device is provided. The base station device includes a communication unit that performs wireless communication with the mobile station device, and a communication control unit. The communication control unit is configured such that the communication unit performs discontinuous communication with the mobile station device in the first intermittent cycle, and is shorter than the first intermittent cycle for each repetition cycle determined separately from the first intermittent cycle. The communication timing with the mobile station apparatus is controlled so as to perform discontinuous communication with the mobile station apparatus at intermittent intervals.
　装置の他の一観点によれば、移動局装置が与えられる。移動局装置は、基地局装置との無線通信を行う通信部と、通信制御部を備える。通信制御部は、通信部が、第１間欠周期で基地局装置と不連続な通信を行い、かつ第１間欠周期とは別に定められた繰り返し周期毎に、第１間欠周期よりも短い第２間欠周期で基地局装置と不連続な通信を行うように、基地局装置との通信時期を制御する。 According to another aspect of the device, a mobile station device is provided. The mobile station device includes a communication unit that performs wireless communication with the base station device, and a communication control unit. The communication control unit is configured such that the communication unit performs discontinuous communication with the base station device in the first intermittent cycle and is shorter than the first intermittent cycle for each repetition cycle determined separately from the first intermittent cycle. The communication timing with the base station apparatus is controlled so as to perform discontinuous communication with the base station apparatus at intermittent intervals.
　装置の他の一観点によれば、基地局装置と、基地局装置と通信する移動局装置を有する無線通信システムが与えられる。基地局装置は、移動局装置との無線通信を行う第１通信部と、通信制御部を備える。通信制御部は、通信部が、第１間欠周期で移動局装置と不連続な通信を行い、かつ第１間欠周期とは別に定められた繰り返し周期毎に、第１間欠周期よりも短い第２間欠周期で移動局装置と不連続な通信を行うように、移動局装置との通信時期を制御する。移動局装置は、第１間欠周期および第２間欠周期において、基地局装置との無線通信を行う第２通信部を備える。 According to another aspect of the apparatus, a radio communication system having a base station apparatus and a mobile station apparatus communicating with the base station apparatus is provided. The base station device includes a first communication unit that performs wireless communication with the mobile station device, and a communication control unit. The communication control unit is configured such that the communication unit performs discontinuous communication with the mobile station device in the first intermittent cycle, and is shorter than the first intermittent cycle for each repetition cycle determined separately from the first intermittent cycle. The communication timing with the mobile station apparatus is controlled so as to perform discontinuous communication with the mobile station apparatus at intermittent intervals. The mobile station apparatus includes a second communication unit that performs wireless communication with the base station apparatus in the first intermittent period and the second intermittent period.
　方法の一観点によれば、通信方法が与えられる。通信方法は、第１間欠周期で不連続な通信を行い、かつ第１間欠周期と無関係に定められた繰り返し周期毎に、第１間欠周期よりも短い第２間欠周期で不連続な通信を行うように、基地局装置と移動局装置との間の通信許可期間を設定することを含む。通信方法は、設定された通信許可期間において、基地局装置と移動局装置とに無線通信を実行させることを含む。 According to one aspect of the method, a communication method is provided. The communication method performs discontinuous communication with a first intermittent cycle and performs discontinuous communication with a second intermittent cycle shorter than the first intermittent cycle for each repetition cycle determined independently of the first intermittent cycle. As described above, it includes setting a communication permission period between the base station apparatus and the mobile station apparatus. The communication method includes causing the base station apparatus and the mobile station apparatus to perform wireless communication in the set communication permission period.
　方法の他の一観点によれば、基地局装置と基地局装置と通信する移動局装置を有する無線通信システムに用いられる通信方法が与えられる。基地局装置は、第１間欠周期で移動局装置と不連続な通信を行い、かつ第１間欠周期とは別に定められた繰り返し周期毎に、第１間欠周期よりも短い第２間欠周期で移動局装置と不連続な通信を行うように、移動局装置との通信時期を制御し、移動局装置は、第１間欠周期および第２間欠周期において、基地局装置との無線通信を行う。 According to another aspect of the method, there is provided a communication method used in a radio communication system having a base station apparatus and a mobile station apparatus communicating with the base station apparatus. The base station apparatus performs discontinuous communication with the mobile station apparatus at the first intermittent period, and moves at a second intermittent period shorter than the first intermittent period at every repetition period determined separately from the first intermittent period. The communication timing with the mobile station apparatus is controlled so as to perform discontinuous communication with the station apparatus, and the mobile station apparatus performs wireless communication with the base station apparatus in the first intermittent period and the second intermittent period.
　本明細書に開示される装置又は方法によれば、間欠通信における通信可能期間の減少に伴うスループット低下が緩和される。 According to the apparatus or method disclosed in the present specification, a decrease in throughput due to a decrease in a communicable period in intermittent communication is mitigated.
　本発明の目的及び利点は、特許請求の範囲に示した要素及びその組合せを用いて具現化され達成される。前述の一般的な記述及び以下の詳細な記述の両方は、単なる例示及び説明であり、特許請求の範囲のように本発明を限定するものでないと解するべきである。 The objects and advantages of the invention will be realized and attained by means of the elements and combinations shown in the claims. It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the invention as claimed.
間欠的な通信期間の設定例の説明図である。It is explanatory drawing of the example of a setting of an intermittent communication period. 間欠的な通信期間の他の例の説明図である。It is explanatory drawing of the other example of an intermittent communication period. 通信システムの全体構成例を示す図である。It is a figure which shows the example of whole structure of a communication system. 基地局装置のハードウエア構成の一例を示す図である。It is a figure which shows an example of the hardware constitutions of a base station apparatus. 移動局装置のハードウエア構成の一例を示す図である。It is a figure which shows an example of the hardware constitutions of a mobile station apparatus. 基地局装置の機能構成の第１例を示す図である。It is a figure which shows the 1st example of a function structure of a base station apparatus. 移動局装置の機能構成の一例を示す図である。It is a figure which shows an example of a function structure of a mobile station apparatus. 基地局装置の動作の第１例を示す図である。It is a figure which shows the 1st example of operation | movement of a base station apparatus. 移動局装置の動作の一例を示す図である。It is a figure which shows an example of operation | movement of a mobile station apparatus. 基地局装置の機能構成の第２例を示す図である。It is a figure which shows the 2nd example of a function structure of a base station apparatus. 基地局装置の動作の第２例を示す図である。It is a figure which shows the 2nd example of operation | movement of a base station apparatus. 基地局装置の機能構成の第３例を示す図である。It is a figure which shows the 3rd example of a function structure of a base station apparatus. 基地局装置の動作の第３例を示す図である。It is a figure which shows the 3rd example of operation | movement of a base station apparatus.
　＜１．間欠通信の例＞
　以下、添付される図面を参照して好ましい実施例について説明する。始めに図１を参照して、本明細書に開示される移動局装置及び基地局装置が不連続な受信又は送信を行う間欠的な通信期間の例について説明する。なお、以下の説明において、基地局装置が不連続な送信を行い移動局装置が不連続な受信を行う場合の例示を使用することがある。しかし、移動局装置が不連続な送信を行い基地局装置が不連続な受信を行う場合にも、同様の間欠的な通信期間を設定してもよい。なお、添付する図面及び以下の説明において移動局装置及び基地局装置を単に「移動局」及び「基地局」と表記することがある。 <1. Example of intermittent communication>
Hereinafter, preferred embodiments will be described with reference to the accompanying drawings. First, an example of an intermittent communication period in which the mobile station apparatus and the base station apparatus disclosed in this specification perform discontinuous reception or transmission will be described with reference to FIG. In the following description, an example in which the base station apparatus performs discontinuous transmission and the mobile station apparatus performs discontinuous reception may be used. However, a similar intermittent communication period may be set when the mobile station apparatus performs discontinuous transmission and the base station apparatus performs discontinuous reception. In the accompanying drawings and the following description, the mobile station apparatus and the base station apparatus may be simply referred to as “mobile station” and “base station”.
　移動局は、参照符号１ａ～１ｃが付けられた期間及び参照符号２ａ～２ｐが付けられた期間において受信動作が許可され、その他の期間での受信動作を停止することにより、不連続な受信動作、すなわち間欠受信を行う。同様に基地局は、参照符号１ａ～１ｃが付けられた期間及び参照符号２ａ～２ｐが付けられた期間において送信動作が許可され、その他の期間での送信動作を停止することにより、不連続な送信動作、すなわち間欠送信を行う。 The mobile station is allowed to perform reception operations in the periods indicated by reference numerals 1a to 1c and the periods indicated by reference numerals 2a to 2p, and discontinuous reception operations by stopping reception operations in other periods. That is, intermittent reception is performed. Similarly, the base station is allowed to perform a transmission operation in a period denoted by reference numerals 1a to 1c and a period denoted by reference numerals 2a to 2p, and discontinuous transmission by stopping transmission operations in other periods. Transmission operation, that is, intermittent transmission is performed.
　本明細書において、参照符号１ａ～１ｃが付けられた期間を「第１通信期間」と表記する。第１通信期間は、第１間欠周期Ｔ１で間欠的に繰り返される。本明細書において、参照符号２ａ～２ｐが付けられた期間を「第２通信期間」と表記する。第２通信期間は、繰り返し周期Ｔｒで繰り返し到来する反復通信期間中に発生し、反復通信期間同士の間隙の残余期間では発生しない。第２通信期間は、反復通信期間において第１間欠周期Ｔ１よりも短い第２間欠周期Ｔ２で間欠的に繰り返される。 In this specification, a period given reference numerals 1a to 1c is referred to as a “first communication period”. The first communication period is intermittently repeated at the first intermittent period T1. In the present specification, a period given reference numerals 2a to 2p is referred to as a “second communication period”. The second communication period occurs during the repetitive communication period that repeatedly arrives at the repetitive cycle Tr, and does not occur in the remaining period of the gap between the repetitive communication periods. The second communication period is intermittently repeated at a second intermittent period T2 shorter than the first intermittent period T1 in the repeated communication period.
　基地局は、第１通信期間の発生周期である第１間欠周期Ｔ１の長さとは無関係に繰り返し周期Ｔｒの長さを設定する。このため、第１通信期間と第２通信期間とのずれは経時的に変化し、第１通信期間同士の間隙中のいずれかの時刻で第２通信期間が発生する。図１の例を参照すると、第１通信期間１ａからこれに続く第２通信期間２ａまでの期間Δ１と、第１通信期間１ｂからこれに続く第２通信期間２ｉまでの期間Δ３とが異なる。また、第１通信期間１ｂとその直前の第２通信期間２ｈまでの期間Δ２と、第１通信期間１ｃとその直前の第２通信期間２ｏまでの期間Δ４とが異なる。 The base station sets the length of the repetition period Tr regardless of the length of the first intermittent period T1, which is the generation period of the first communication period. For this reason, the difference between the first communication period and the second communication period changes with time, and the second communication period occurs at any time in the gap between the first communication periods. Referring to the example of FIG. 1, a period Δ1 from the first communication period 1a to the second communication period 2a following this is different from a period Δ3 from the first communication period 1b to the subsequent second communication period 2i. Further, a period Δ2 until the first communication period 1b and the second communication period 2h immediately before it is different from a period Δ4 until the first communication period 1c and the second communication period 2o immediately before it.
　第１間欠周期Ｔ１で繰り返す第１通信期間同士の間隙に、比較的短い第２間欠周期Ｔ２で繰り返す第２通信期間が設けることにより、第１間欠周期Ｔ１を長くしても第１通信期間同士の間隙で発生したトラヒックを次の第１通信期間の到来時期よりも早く送信できる。このため、第１間欠周期Ｔ１がより長くなり単位時間あたりの通信可能期間が減少しても、トラヒックの伝送遅れによるスループット低下を緩和することができる。 Even if the first intermittent period T1 is lengthened by providing a second communication period that repeats at a relatively short second intermittent period T2 in the gap between the first communication periods that repeat at the first intermittent period T1, the first communication periods Can be transmitted earlier than the arrival time of the next first communication period. For this reason, even if the first intermittent period T1 becomes longer and the communicable period per unit time is reduced, it is possible to mitigate a decrease in throughput due to a traffic transmission delay.
　また、第１通信期間と第２通信期間とのずれを経時的に変化させることにより、第１通信期間同士の間隙中における第２通信期間の位置の偏りを低減することができる。これに対して第１通信期間と第２通信期間とのずれが経時的に変化しないと、第１通信期間同士の間隙中に、第２通信期間によりトラヒックが送信できる期間とそうでない期間の不均衡が定常的に発生する。 In addition, by changing the shift between the first communication period and the second communication period with time, it is possible to reduce the deviation of the position of the second communication period in the gap between the first communication periods. On the other hand, if the difference between the first communication period and the second communication period does not change with time, there is no difference between the period during which traffic can be transmitted by the second communication period and the period during which the traffic is not transmitted in the gap between the first communication periods. Equilibrium occurs constantly.
　図２に、第１通信期間と第２通信期間とのずれが経時的に変化しない場合の通信期間の例を示す。図２の例では、第１間欠周期Ｔ１と繰り返し周期Ｔｒとが等しいため、第１通信期間からこれに続く第２通信期間までの期間は常に同じ期間Δ１となる。また、第１通信期間とその直前の第２通信期間までの期間は常に同じ期間Δ３となる。これらの期間Δ１及びΔ３では、第２通信期間でトラヒックが送信されることがないため、他の期間に比べて送信遅延が常に長くなるおそれがある。 FIG. 2 shows an example of a communication period when the difference between the first communication period and the second communication period does not change with time. In the example of FIG. 2, since the first intermittent period T1 and the repetition period Tr are equal, the period from the first communication period to the subsequent second communication period is always the same period Δ1. Further, the period from the first communication period to the second communication period immediately before is always the same period Δ3. In these periods Δ1 and Δ3, traffic is not transmitted in the second communication period, so there is a possibility that the transmission delay is always longer than in other periods.
　第１通信期間と第２通信期間とのずれを経時的に変化させることにより、第１通信期間の間隙中に、定常的に第２通信期間でトラヒックが送信されない時間帯が固定化することを防ことができる。これにより、第１通信期間同士の間隙中に常に他よりも送信遅延が長い時間帯が発生することを防止できる。 By changing the difference between the first communication period and the second communication period over time, the time period during which no traffic is constantly transmitted in the second communication period is fixed in the gap of the first communication period. Can be prevented. As a result, it is possible to prevent the occurrence of a time zone in which the transmission delay is always longer than the others in the gap between the first communication periods.
　＜２．ハードウエア構成＞
　続いて、上記の間欠的な通信が実施される通信システムの例を説明する。図３は、通信システムの全体構成例を示す図である。通信システム１０は、アクセスネットワーク１１、基地局１２ａ～１２ｃ、移動局１３、アクセスゲートウエイ装置１４及びコアネットワーク１５を備える。通信システム１０は、例えば、３ＧＰＰ（Third Generation Partnership Project）で検討されるＬＴＥ(Long Term Evolution)方式の移動通信システムであってよい。 <2. Hardware configuration>
Subsequently, an example of a communication system in which the above intermittent communication is performed will be described. FIG. 3 is a diagram illustrating an example of the overall configuration of the communication system. The communication system 10 includes an access network 11, base stations 12a to 12c, a mobile station 13, an access gateway device 14, and a core network 15. The communication system 10 may be, for example, an LTE (Long Term Evolution) mobile communication system studied by 3GPP (Third Generation Partnership Project).
　以下の説明では、ＬＴＥ方式の移動通信システムにおける実施形態の例を示す。但し、本明細書に開示される装置及び方法は、ＤＲＸやＤＴＸ（discontinuous transmission）などの間欠的な送受信動作をサポートするセルラー方式の移動通信システムであれば他の方式の移動通信システムでも適用可能である。なお、添付する図面及び以下の説明においてアクセスゲートウエイ装置を「ＡＧＷ」と表記することがある。また、基地局１２ａ～１２ｃを総称して「基地局１２」と表記することがある。 In the following description, an example of an embodiment in an LTE mobile communication system is shown. However, the apparatus and method disclosed in this specification can be applied to other mobile communication systems as long as they are cellular mobile communication systems that support intermittent transmission / reception operations such as DRX and DTX (discontinuous transmission). It is. In the accompanying drawings and the following description, the access gateway device may be referred to as “AGW”. Further, the base stations 12a to 12c may be collectively referred to as “base station 12”.
　基地局１２は、アクセスネットワーク１１を形成し、移動通信サービスを受けるユーザの移動局１３と地上側の有線通信網との間の通信を所定の無線通信規格に従って中継する。コアネットワーク１５は、電話網やインターネットなどの公衆網に接続され、移動局１３とこれら公衆網との接続処理やデータ転送がコアネットワーク１５で行われる。基地局１２及びアクセスネットワーク１１は、ＡＧＷ１４を介してコアネットワーク１５に接続される。 The base station 12 forms the access network 11 and relays communication between the mobile station 13 of the user who receives the mobile communication service and the wired communication network on the ground side in accordance with a predetermined wireless communication standard. The core network 15 is connected to a public network such as a telephone network or the Internet, and connection processing and data transfer between the mobile station 13 and these public networks are performed in the core network 15. The base station 12 and the access network 11 are connected to the core network 15 via the AGW 14.
　＜２．１．基地局のハードウエア構成＞
　次に、図４を参照して、基地局１２のハードウエア構成について説明する。基地局１２は、プロセッサ２０と、記憶装置２１と、ベースバンド処理回路２２と、無線周波数信号処理回路２３と、ネットワークインタフェース回路２４を備える。なお、以下の説明及び添付図面において、ベースバンド、無線周波数及びネットワークインタフェースを、それぞれ「ＢＢ」、「ＲＦ」及び「ＮＩＦ」と表記することがある。 <2.1. Base station hardware configuration>
Next, the hardware configuration of the base station 12 will be described with reference to FIG. The base station 12 includes a processor 20, a storage device 21, a baseband processing circuit 22, a radio frequency signal processing circuit 23, and a network interface circuit 24. In the following description and accompanying drawings, the baseband, the radio frequency, and the network interface may be expressed as “BB”, “RF”, and “NIF”, respectively.
　プロセッサ２０は、下記のＢＢ処理回路２２が行う処理以外のユーザ管理処理や基地局３の動作制御を行う。記憶装置２１には、プロセッサ２０による情報処理のための制御プログラムが格納される。またこれらのプログラムの実行中に使用される各データ及び一時データも記憶装置２１に格納される。 The processor 20 performs user management processing other than the processing performed by the following BB processing circuit 22 and operation control of the base station 3. The storage device 21 stores a control program for information processing by the processor 20. Each data and temporary data used during the execution of these programs are also stored in the storage device 21.
　ＢＢ処理回路２２は、移動局１３と基地局１２との間で送受信される信号の符号化及び変調、並びに復調及び復号化、通信プロトコル処理、スケジューリングに関するＢＢ信号の処理を実施する。ＢＢ処理回路２２は、信号処理のためのプロセッサや、プロセッサの動作に使用されるプログラム及びデータを格納するためのメモリを備えていてもよい。プロセッサは、例えばDSP(digital signal processor)やCPU(Central Processing Unit: 中央処理ユニット)であってよい。またＢＢ処理回路２２は、信号処理のためのLSI（large scale integration）やASIC（Application Specific Integrated Circuit）、FPGA（Field-Programming Gate Array）等の論理回路を備えていてもよい。 The BB processing circuit 22 performs processing of BB signals related to encoding and modulation of signals transmitted and received between the mobile station 13 and the base station 12, demodulation and decoding, communication protocol processing, and scheduling. The BB processing circuit 22 may include a processor for signal processing and a memory for storing programs and data used for the operation of the processor. The processor may be, for example, a DSP (digital signal processor) or a CPU (Central processing unit). The BB processing circuit 22 may include logic circuits such as LSI (large scale integration), ASIC (Application Specific Integrated Circuit), and FPGA (Field-Programming Gate Array) for signal processing.
　ＲＦ信号処理回路２３は、移動局１３と基地局１２との間で送受信される無線信号のデジタルアナログ変換、アナログデジタル変換、周波数変換、信号増幅及びフィルタリングを行う。ＮＩＦ回路２４は、アクセスネットワーク１１を経由した他の基地局やＡＧＷ１４との信号の送受信のための信号処理を行う。 The RF signal processing circuit 23 performs digital-analog conversion, analog-digital conversion, frequency conversion, signal amplification, and filtering of a radio signal transmitted / received between the mobile station 13 and the base station 12. The NIF circuit 24 performs signal processing for transmission and reception of signals with other base stations and the AGW 14 via the access network 11.
　＜２．２．移動局のハードウエア構成＞
　次に、図５を参照して、移動局１３のハードウエア構成について説明する。移動局１３はプロセッサ３０と、記憶装置３１と、ＢＢ処理回路３２と、ＲＦ信号処理回路３３を備える。プロセッサ３０は、ＢＢ処理回路３２が行う下記の処理以外の移動局１３の動作制御と、ユーザデータを処理するアプリケーションプログラムを実行する。記憶装置３１には、プロセッサ３０による情報処理のためのアプリケーションプログラムが格納される。またこれらのプログラムの実行中に使用される各データ及び一時データも記憶装置３１に格納される。 <2.2. Mobile station hardware configuration>
Next, the hardware configuration of the mobile station 13 will be described with reference to FIG. The mobile station 13 includes a processor 30, a storage device 31, a BB processing circuit 32, and an RF signal processing circuit 33. The processor 30 executes operation control of the mobile station 13 other than the following processing performed by the BB processing circuit 32 and an application program for processing user data. The storage device 31 stores an application program for information processing by the processor 30. Each data and temporary data used during the execution of these programs are also stored in the storage device 31.
　ＢＢ処理回路３２は、移動局１３と基地局１２との間で送受信される信号の符号化及び変調、並びに復調及び復号化、通信プロトコル処理、スケジューリングに関するＢＢ信号の処理を実施する。ＢＢ処理回路３２は、信号処理のためのプロセッサや、プロセッサの動作に使用されるプログラム及びデータを格納するためのメモリを備えていてもよい。プロセッサは、例えばDSPやCPUであってよい。またＢＢ処理回路３２は、信号処理のためのLSIやASIC、FPGA等の論理回路を備えていてもよい。 The BB processing circuit 32 performs processing of BB signals related to encoding and modulation of signals transmitted and received between the mobile station 13 and the base station 12, demodulation and decoding, communication protocol processing, and scheduling. The BB processing circuit 32 may include a processor for signal processing and a memory for storing programs and data used for the operation of the processor. The processor may be a DSP or a CPU, for example. The BB processing circuit 32 may include a logic circuit such as an LSI, ASIC, or FPGA for signal processing.
　ＲＦ信号処理回路３３は、移動局１３と基地局１２との間で送受信される無線信号のデジタルアナログ変換、アナログデジタル変換、周波数変換、信号増幅及びフィルタリング等の信号処理を行う。なお、図４及び図５に示すハードウエア構成は実施例の説明のための例示にすぎない。以下に記載される動作を実行するものであれば、本明細書に記載される通信システムは、他のどのようなハードウエア構成を採用してもよい。 The RF signal processing circuit 33 performs signal processing such as digital-analog conversion, analog-digital conversion, frequency conversion, signal amplification, and filtering of radio signals transmitted and received between the mobile station 13 and the base station 12. Note that the hardware configurations shown in FIGS. 4 and 5 are merely examples for explaining the embodiments. As long as the operation described below is executed, the communication system described in this specification may adopt any other hardware configuration.
　＜３．第１実施例＞
　＜３．１．基地局の機能構成＞
　続いて、上記ハードウエア構成によって実現される機能について説明する。図６は、基地局１２の機能構成の第１例を示す図である。基地局１２は、無線通信部４０と、ネットワーク通信部４１と、データ処理部４２と、制御部４３を備える。 <3. First Example>
<3.1. Functional configuration of base station>
Next, functions realized by the hardware configuration will be described. FIG. 6 is a diagram illustrating a first example of a functional configuration of the base station 12. The base station 12 includes a wireless communication unit 40, a network communication unit 41, a data processing unit 42, and a control unit 43.
　無線通信部４０は、基地局１２と移動局１３との間で送受信される制御信号及びユーザトラフィックの無線信号の送受信処理、符号化処理、復号化処理、変調処理及び復調処理を行う。ネットワーク通信部４１は、基地局１２と、アクセスネットワーク１１との間のインタフェースであり、アクセスネットワーク１１との間でパケットの送受信を行う。 The wireless communication unit 40 performs transmission / reception processing, encoding processing, decoding processing, modulation processing, and demodulation processing of control signals and user traffic wireless signals transmitted and received between the base station 12 and the mobile station 13. The network communication unit 41 is an interface between the base station 12 and the access network 11, and transmits / receives packets to / from the access network 11.
　データ処理部４２は、基地局１２と移動局１３との間で送受信される通信データすなわちユーザトラヒックを処理する。制御部４３は、無線リソース制御（RRC: Radio Resource Control）、通信プロトコル処理、スケジューリング処理、呼制御処理、ユーザ管理処理及び移動局１３との間で実施する間欠通信の制御等の、移動局１３との間の無線通信の制御を実施する。制御部４３は、間欠動作制御部５０と、制御信号送信部５１を備える。なお、添付する図面又は以下の説明において、無線リソース制御を「ＲＲＣ」と表記することがある。 The data processing unit 42 processes communication data transmitted / received between the base station 12 and the mobile station 13, that is, user traffic. The control unit 43 controls the mobile station 13 such as radio resource control (RRC: “Radio Resource Control”), communication protocol processing, scheduling processing, call control processing, user management processing, and control of intermittent communication performed with the mobile station 13. Control of wireless communication with The control unit 43 includes an intermittent operation control unit 50 and a control signal transmission unit 51. In the accompanying drawings or the following description, radio resource control may be referred to as “RRC”.
　間欠動作制御部５０は、移動局１３との間で実施する間欠通信動作を制御する。間欠動作制御部５０は、第１タイマ５２と、第２タイマ５３と、通信時期設定部５４と、送信時期制御部５５を備える。第１タイマ５２は、第１通信期間の開始と終了を検出する。第２タイマ５３は、第２通信期間の開始と終了を検出する。第１タイマ５２及び第２タイマ５３は、第１通信期間及び第２通信期間の開始と終了を送信時期制御部５５に通知する。 The intermittent operation control unit 50 controls the intermittent communication operation performed with the mobile station 13. The intermittent operation control unit 50 includes a first timer 52, a second timer 53, a communication timing setting unit 54, and a transmission timing control unit 55. The first timer 52 detects the start and end of the first communication period. The second timer 53 detects the start and end of the second communication period. The first timer 52 and the second timer 53 notify the transmission timing control unit 55 of the start and end of the first communication period and the second communication period.
　通信時期設定部５４は、第１通信期間の開始と終了の検出に使用される第１間欠周期Ｔ１及び間欠通信動作の開始時刻の情報を第１タイマ５２に設定する。また、通信時期設定部５４は、第２通信期間の開始と終了の検出に使用される第２間欠周期Ｔ２、繰り返し周期Ｔｒ、及び間欠通信動作の開始時刻の情報を第２タイマ５３に設定する。 The communication time setting unit 54 sets, in the first timer 52, information on the first intermittent period T1 and the start time of the intermittent communication operation that are used to detect the start and end of the first communication period. Further, the communication timing setting unit 54 sets, in the second timer 53, information on the second intermittent period T2, the repetition period Tr, and the start time of the intermittent communication operation that are used to detect the start and end of the second communication period. .
　送信時期制御部５５は、移動局１３へ送信する予定の下りリンクデータがあるか否かをデータ処理部４２に照会する。下りリンクデータがある場合に送信時期制御部５５は、第１通信期間及び第２通信期間のいずれかの間に、ＰＤＣＣＨ（Physical Downlink Control Channel）を経由して下りリンクデータを送信する旨の通知を移動局１３へ送信する。送信時期制御部５５は、第１通信期間及び第２通信期間のいずれかの間に下りリンクデータの出力をデータ処理部４２に指示し、移動局１３に下りリンクデータを送信する。 The transmission timing control unit 55 inquires of the data processing unit 42 whether there is downlink data to be transmitted to the mobile station 13. When there is downlink data, the transmission timing control unit 55 notifies that the downlink data is transmitted via the PDCCH (Physical Downlink Control Channel) during either the first communication period or the second communication period. Is transmitted to the mobile station 13. The transmission timing control unit 55 instructs the data processing unit 42 to output downlink data during either the first communication period or the second communication period, and transmits the downlink data to the mobile station 13.
　制御信号送信部５１は、第１間欠周期Ｔ１、第２間欠周期Ｔ２、繰り返し周期Ｔｒ、及び間欠通信動作の開始時刻の情報を、ＲＲＣシグナリンクによって移動局１３に送信する。以下の説明及び添付図面において、第１間欠周期Ｔ１、第２間欠周期Ｔ２及び繰り返し周期Ｔｒ、及び間欠通信動作の開始時刻の情報を「設定情報」と表記することがある。 The control signal transmission unit 51 transmits information about the first intermittent cycle T1, the second intermittent cycle T2, the repetition cycle Tr, and the start time of the intermittent communication operation to the mobile station 13 through the RRC signal link. In the following description and the accompanying drawings, information on the first intermittent cycle T1, the second intermittent cycle T2, the repetition cycle Tr, and the start time of the intermittent communication operation may be referred to as “setting information”.
　なお、無線通信部４０の上記動作は、図４に示すプロセッサ２０、ＢＢ処理回路２２及びＲＦ信号処理回路２３が協働することによって実行される。ネットワーク通信部４１の上記動作は、ＮＩＦ回路２４によって実行される。データ処理部４２及び間欠動作制御部５０の動作は、プロセッサ２０によって実行される。制御信号送信部５１の動作は、プロセッサ２０及びＢＢ処理回路２２によって実行される。 The above-described operation of the wireless communication unit 40 is executed by the cooperation of the processor 20, the BB processing circuit 22, and the RF signal processing circuit 23 shown in FIG. The above operation of the network communication unit 41 is executed by the NIF circuit 24. The operations of the data processing unit 42 and the intermittent operation control unit 50 are executed by the processor 20. The operation of the control signal transmission unit 51 is executed by the processor 20 and the BB processing circuit 22.
　＜３．２．移動局の機能構成＞
　続いて、図７を参照して移動局１３の機能を説明する。図７は、移動局１３の機能構成の一例を示す図である。移動局１３は、無線通信部６０、データ処理部６１と、制御部６２を備える。無線通信部６０は、基地局１２と移動局１３との間で送受信される制御信号及びユーザトラフィックの無線信号の送受信処理、符号化処理、復号化処理、変調処理及び復調処理を行う。 <3.2. Functional configuration of mobile station>
Next, the function of the mobile station 13 will be described with reference to FIG. FIG. 7 is a diagram illustrating an example of a functional configuration of the mobile station 13. The mobile station 13 includes a wireless communication unit 60, a data processing unit 61, and a control unit 62. The wireless communication unit 60 performs transmission / reception processing, encoding processing, decoding processing, modulation processing, and demodulation processing of control signals and user traffic wireless signals transmitted and received between the base station 12 and the mobile station 13.
　データ処理部６１は、基地局１２と移動局１３との間で送受信される通信データを処理する。制御部６２は、無線リソース制御、通信プロトコル処理、呼処理制御及び移動局１３により実施する間欠通信の制御等の、基地局１２との間の無線通信の制御を実施する。制御部６２は、間欠動作制御部７０と、制御信号受信部７１を備える。 The data processing unit 61 processes communication data transmitted / received between the base station 12 and the mobile station 13. The control unit 62 controls wireless communication with the base station 12 such as wireless resource control, communication protocol processing, call processing control, and intermittent communication control performed by the mobile station 13. The control unit 62 includes an intermittent operation control unit 70 and a control signal receiving unit 71.
　間欠動作制御部７０は、移動局１３により実施する間欠通信動作を制御する。制御信号受信部７１は、ＲＲＣシグナリンクによって基地局１２から送信される設定情報を受信する。 The intermittent operation control unit 70 controls the intermittent communication operation performed by the mobile station 13. The control signal receiving unit 71 receives setting information transmitted from the base station 12 through the RRC signal link.
　間欠動作制御部７０は、第１タイマ７２と、第２タイマ７３と、通信時期設定部７４と、通信時期制御部７５を備える。第１タイマ７２は、第１通信期間の開始と終了を検出する。第２タイマ７３は、第２通信期間の開始と終了を検出する。第１タイマ７２及び第２タイマ７３は、第１通信期間及び第２通信期間の開始と終了を通信時期制御部７５に通知する。 The intermittent operation control unit 70 includes a first timer 72, a second timer 73, a communication time setting unit 74, and a communication time control unit 75. The first timer 72 detects the start and end of the first communication period. The second timer 73 detects the start and end of the second communication period. The first timer 72 and the second timer 73 notify the communication timing control unit 75 of the start and end of the first communication period and the second communication period.
　通信時期設定部７４は、制御信号受信部７１から設定情報を取得する。通信時期設定部７４は、第１間欠周期Ｔ１及び間欠通信動作の開始時刻の情報を第１タイマ７２に設定する。また、通信時期設定部７４は、第２間欠周期Ｔ２、繰り返し周期Ｔｒ、及び間欠通信動作の開始時刻の情報を第２タイマ７３に設定する。 The communication time setting unit 74 acquires setting information from the control signal receiving unit 71. The communication timing setting unit 74 sets information on the first intermittent cycle T1 and the start time of the intermittent communication operation in the first timer 72. In addition, the communication timing setting unit 74 sets information on the second intermittent period T2, the repetition period Tr, and the start time of the intermittent communication operation in the second timer 73.
　通信時期制御部７５は、第１通信期間及び第２通信期間に無線通信部６０の受信機能及び送信機能を作動させる。無線通信部６０は、ＰＤＣＣＨを受信することによって移動局１３へ送信される下りリンクデータがあるか否かを判断し、もし下りリンクデータがある場合には受信する。 The communication timing control unit 75 operates the reception function and the transmission function of the wireless communication unit 60 during the first communication period and the second communication period. The radio communication unit 60 determines whether there is downlink data to be transmitted to the mobile station 13 by receiving the PDCCH, and if there is downlink data, receives it.
　通信時期制御部７５は、基地局１２へ送信する予定の上りリンクデータがあるか否かをデータ処理部６１に照会する。上りリンクデータがある場合に制御部６２は、第１通信期間及び第２通信期間のいずれかの間に、ＰＵＣＣＨ（Physical Uplink Control Channel）を経由してスケジューリングリクエストを基地局１２へ送信する。ＰＤＣＣＨを経由して上りリンクスケジューリンググラントが受信された場合に、送信時期制御部５５は、第１通信期間及び第２通信期間のいずれかの間に上りリンクデータの出力をデータ処理部６１に指示し、基地局１２に上りリンクデータを送信する。 The communication timing control unit 75 inquires of the data processing unit 61 whether there is uplink data scheduled to be transmitted to the base station 12. When there is uplink data, the control unit 62 transmits a scheduling request to the base station 12 via PUCCH (Physical-Uplink-Control-Channel) during either the first communication period or the second communication period. When the uplink scheduling grant is received via the PDCCH, the transmission timing control unit 55 instructs the data processing unit 61 to output uplink data during either the first communication period or the second communication period. Then, uplink data is transmitted to the base station 12.
　なお、無線通信部６０の上記動作は、図５に示すプロセッサ３０、ＢＢ処理回路３２及びＲＦ信号処理回路３３が協働することによって実行される。データ処理部６１及び間欠動作制御部７０の動作は、プロセッサ３０によって実行される。制御信号受信部７１の動作は、プロセッサ３０及びＢＢ処理回路３２によって実行される。 Note that the operation of the wireless communication unit 60 is executed by the cooperation of the processor 30, the BB processing circuit 32, and the RF signal processing circuit 33 shown in FIG. The operations of the data processing unit 61 and the intermittent operation control unit 70 are executed by the processor 30. The operation of the control signal receiving unit 71 is executed by the processor 30 and the BB processing circuit 32.
　なお、図６及び図７の機能構成図は、本明細書において説明される基地局１２及び移動局１３の機能に関係する構成を中心に示している。基地局１２及び移動局１３は、図示の構成要素以外の他の構成要素を含んでいてよい。図１０及び図１２でも同様である。 Note that the functional configuration diagrams of FIGS. 6 and 7 mainly illustrate configurations related to the functions of the base station 12 and the mobile station 13 described in this specification. The base station 12 and the mobile station 13 may include other components than the illustrated components. The same applies to FIGS. 10 and 12.
　＜３．３．動作説明＞
　図８は、基地局１２の動作の第１例を示す図である。図８を参照して説明する一連の動作は複数の手順を含む方法と解釈してもよい。この場合に「オペレーション」を「ステップ」と読み替えてもよい。図９、図１１及び図１３に示す動作も同様である。 <3.3. Operation explanation>
FIG. 8 is a diagram illustrating a first example of the operation of the base station 12. A series of operations described with reference to FIG. 8 may be interpreted as a method including a plurality of procedures. In this case, “operation” may be read as “step”. The operations shown in FIGS. 9, 11 and 13 are the same.
　オペレーションＡＡにおいて制御部４３は、移動局１３との間のＲＲＣ接続を確立する。オペレーションＡＢにおいて通信時期設定部５４は、第２間欠周期Ｔ２と、繰り返し周期Ｔｒと、を第２タイマ５３に設定することにより第２通信期間の設定を行う。オペレーションＡＣにおいて制御信号送信部５１は、設定情報を移動局１３へ送信する。 In operation AA, the control unit 43 establishes an RRC connection with the mobile station 13. In operation AB, the communication timing setting unit 54 sets the second communication period by setting the second intermittent period T2 and the repetition period Tr in the second timer 53. In operation AC, the control signal transmission unit 51 transmits the setting information to the mobile station 13.
　オペレーションＡＤにおいて送信時期制御部５５は、現在が第１通信期間であるか否かを判断する。現在が第１通信期間である場合（オペレーションＡＤ：Ｙ）に動作はオペレーションＡＦへ進む。現在が第１通信期間でない場合（オペレーションＡＤ：Ｎ）に動作はオペレーションＡＥへ進む。オペレーションＡＥにおいて送信時期制御部５５は、現在が第２通信期間であるか否かを判断する。現在が第２通信期間である場合（オペレーションＡＥ：Ｙ）に動作はオペレーションＡＦへ進む。現在が第２通信期間でない場合（オペレーションＡＥ：Ｎ）に動作はオペレーションＡＧへ進む。 In operation AD, the transmission timing control unit 55 determines whether the current communication period is the first communication period. When the current time is the first communication period (operation AD: Y), the operation proceeds to operation AF. If the current time is not the first communication period (operation AD: N), the operation proceeds to operation AE. In operation AE, the transmission timing control unit 55 determines whether or not the present time is the second communication period. When the current time is the second communication period (operation AE: Y), the operation proceeds to operation AF. If the current time is not the second communication period (operation AE: N), the operation proceeds to operation AG.
　オペレーションＡＦにおいて送信時期制御部５５は、移動局１３へ送信される下りリンクデータがあるか否かを判断する。下りリンクデータがある場合に送信時期制御部５５は、ＰＤＣＣＨ及び下りリンクデータを送信する。無線通信部４０は、移動局１３からの上りリンクデータを受信する。オペレーションＡＧにおいて制御部４３は、移動局１３との間のＲＲＣ接続が切断されるか、若しくは移動局１３が待ち受け状態になるか否かを判断する。ＲＲＣ接続が切断されるか、移動局１３が待ち受け状態になる場合（オペレーションＡＧ：Ｙ）に動作が終了する。ＲＲＣ接続が維持され且つ移動局１３が待ち受け状態にならない場合（オペレーションＡＧ：Ｎ）に動作はオペレーションＡＤへ戻る。 In operation AF, the transmission timing control unit 55 determines whether there is downlink data to be transmitted to the mobile station 13. When there is downlink data, the transmission timing control unit 55 transmits PDCCH and downlink data. The radio communication unit 40 receives uplink data from the mobile station 13. In operation AG, the control unit 43 determines whether the RRC connection with the mobile station 13 is disconnected or whether the mobile station 13 enters a standby state. The operation ends when the RRC connection is disconnected or the mobile station 13 enters a standby state (operation AG: Y). When the RRC connection is maintained and the mobile station 13 does not enter the standby state (operation AG: N), the operation returns to operation AD.
　図９は、移動局１３の動作の一例を示す図である。オペレーションＢＡにおいて制御部６２は、移動局１３との間のＲＲＣ接続を確立する。オペレーションＢＢにおいて制御信号受信部７１は、基地局１２から送信される設定情報を受信する。通信時期設定部７４は、設定情報を第１タイマ７２及び第２タイマ７３に設定する。 FIG. 9 is a diagram illustrating an example of the operation of the mobile station 13. In operation BA, the control unit 62 establishes an RRC connection with the mobile station 13. In operation BB, the control signal receiving unit 71 receives setting information transmitted from the base station 12. The communication time setting unit 74 sets the setting information in the first timer 72 and the second timer 73.
　オペレーションＢＣにおいて通信時期制御部７５は、現在が第１通信期間であるか否かを判断する。現在が第１通信期間である場合（オペレーションＢＣ：Ｙ）に動作はオペレーションＢＥへ進む。現在が第１通信期間でない場合（オペレーションＢＣ：Ｎ）に動作はオペレーションＢＤへ進む。オペレーションＢＤにおいて通信時期制御部７５は、現在が第２通信期間であるか否かを判断する。現在が第２通信期間である場合（オペレーションＢＤ：Ｙ）に動作はオペレーションＢＥへ進む。現在が第２通信期間でない場合（オペレーションＢＤ：Ｎ）に動作はオペレーションＢＪへ進む。 In operation BC, the communication timing control unit 75 determines whether the current communication period is the first communication period. If the current time is the first communication period (operation BC: Y), the operation proceeds to operation BE. If the current time is not the first communication period (operation BC: N), the operation proceeds to operation BD. In operation BD, the communication timing control unit 75 determines whether or not the current time is the second communication period. If the current time is the second communication period (operation BD: Y), the operation proceeds to operation BE. If the current time is not the second communication period (operation BD: N), the operation proceeds to operation BJ.
　オペレーションＢＥにおいて無線通信部６０の受信機能及び送信機能を作動させる。無線通信部６０は、ＰＤＣＣＨを受信する。オペレーションＢＦにおいて無線通信部６０は、移動局１３へ送信される下りリンクデータがあるか否かを判断する。下りリンクデータがある場合（オペレーションＢＦ：Ｙ）に動作はオペレーションＢＧへ進む。下りリンクデータがない場合（オペレーションＢＦ：Ｎ）に動作はオペレーションＢＨへ進む。オペレーションＢＧにおいて無線通信部６０は下りリンクデータを受信する。 In operation BE, the reception function and transmission function of the wireless communication unit 60 are activated. The radio communication unit 60 receives the PDCCH. In operation BF, the radio communication unit 60 determines whether there is downlink data to be transmitted to the mobile station 13. If there is downlink data (operation BF: Y), the operation proceeds to operation BG. If there is no downlink data (operation BF: N), the operation proceeds to operation BH. In operation BG, the wireless communication unit 60 receives downlink data.
　オペレーションＢＨにおいて通信時期制御部７５は、基地局１２へ送信する予定の上りリンクデータがあるか否かを判断する。上りリンクデータがある場合（オペレーションＢＨ：Ｙ）に動作はオペレーションＢＩへ進む。上りリンクデータがない場合（オペレーションＢＨ：Ｎ）に動作はオペレーションＢＪへ進む。 In operation BH, the communication timing control unit 75 determines whether there is uplink data scheduled to be transmitted to the base station 12. When there is uplink data (operation BH: Y), the operation proceeds to operation BI. If there is no uplink data (operation BH: N), the operation proceeds to operation BJ.
　オペレーションＢＩにおいて制御部６２は、スケジューリングリクエストを基地局１２へ送信する。上りリンクスケジューリンググラントが受信された場合に、送信時期制御部５５は下りリンクデータを送信する。オペレーションＢＪにおいて制御部６２は、基地局１２との間のＲＲＣ接続が切断されるか、若しくは移動局１３が待ち受け状態になるか否かを判断する。ＲＲＣ接続が切断されるか、移動局１３が待ち受け状態になる場合には動作が終了する。ＲＲＣ接続が維持され且つ移動局１３が待ち受け状態にならない場合に、動作はオペレーションＢＣへ戻る。 In operation BI, the control unit 62 transmits a scheduling request to the base station 12. When the uplink scheduling grant is received, the transmission timing control unit 55 transmits downlink data. In operation BJ, the control unit 62 determines whether the RRC connection with the base station 12 is disconnected or whether the mobile station 13 enters a standby state. When the RRC connection is disconnected or the mobile station 13 enters a standby state, the operation ends. If the RRC connection is maintained and the mobile station 13 does not enter the standby state, the operation returns to operation BC.
　＜３．４．効果＞
　本実施例によれば、所定の第１間欠周期Ｔ１で間欠的に繰り返される第１通信期間だけでなく、第１通信期間同士の間隙中でも第２通信期間において通信を行うことが可能になる。これにより、第１通信期間の間欠周期Ｔ１をより長くなることで単位時間あたりの通信可能期間が減少しても、トラヒックの伝送遅れによるスループット低下を緩和することができる。 <3.4. Effect>
According to the present embodiment, it is possible to perform communication in the second communication period not only in the first communication period that is intermittently repeated at the predetermined first intermittent period T1, but also in the gap between the first communication periods. Thereby, even if the intermittent period T1 of the first communication period becomes longer and the communicable period per unit time decreases, it is possible to mitigate the decrease in throughput due to traffic transmission delay.
　繰り返し周期Ｔｒが、第１間欠周期Ｔ１と無関係に設定されることにより、第１通信期間と第２通信期間とのずれが経時的に変化する。これにより、第１通信期間の間隙中に、定常的にトラヒックが送信されない時間帯が固定化することを防ことができる。これにより、第１通信期間同士の間隙中に常に他よりも送信遅延が長い時間帯が発生することを防止できる。 Since the repetition period Tr is set independently of the first intermittent period T1, the difference between the first communication period and the second communication period changes with time. As a result, it is possible to prevent the time zone during which traffic is not constantly transmitted from being fixed in the gap of the first communication period. As a result, it is possible to prevent the occurrence of a time zone in which the transmission delay is always longer than others in the gap between the first communication periods.
　＜３．５．変形例＞
　上記の説明において、基地局１２は移動局１３への送信と受信の両方を同じ期間に行った。同様に移動局１３も送信と受信の両方を同じ期間に行った。他の実施例では、送信と受信とを別々の期間に行ってよい。間欠受信を行うタイミングと、間欠送信を行うタイミングは、それぞれ独立に制御されてもよい。 <3.5. Modification>
In the above description, the base station 12 performs both transmission and reception to the mobile station 13 in the same period. Similarly, the mobile station 13 performed both transmission and reception in the same period. In other embodiments, transmission and reception may occur in separate periods. The timing for performing intermittent reception and the timing for performing intermittent transmission may be controlled independently of each other.
　＜４．第２実施例＞
　続いて、基地局１２の他の実施例について説明する。本実施例の基地局１２は、繰り返し周期Ｔｒを、基地局１２と移動局１３との無線通信の態様に応じて決定する。例えば、基地局１２は、基地局１２と移動局１３との通信の発生周期に応じて決定する。例えば、繰り返し周期Ｔｒは、移動局１３で使用されているアプリケーションプログラムによる通信の発生周期に応じて決定される。電子メールの着信確認は、例えば５分ごと１０分ごと等に設定されるが、本実施例ではこのようなアプリケーションプログラムの設定に応じて繰り返し周期Ｔｒ設定する。 <4. Second Embodiment>
Next, another embodiment of the base station 12 will be described. The base station 12 of this embodiment determines the repetition period Tr according to the mode of wireless communication between the base station 12 and the mobile station 13. For example, the base station 12 determines according to the generation period of communication between the base station 12 and the mobile station 13. For example, the repetition period Tr is determined according to the generation period of communication by the application program used in the mobile station 13. The incoming e-mail confirmation is set, for example, every 5 minutes or every 10 minutes. In this embodiment, the repetition period Tr is set in accordance with the setting of such an application program.
　図１０は、基地局１２の機能構成の第２例を示す図である。図６に示す構成要素と同様の構成要素には図６で使用した参照符号と同じ参照符号を付し、同一の機能については説明を省略する。間欠動作制御部５０は履歴取得部５６を備える。 FIG. 10 is a diagram illustrating a second example of the functional configuration of the base station 12. Components similar to those shown in FIG. 6 are given the same reference numerals as those used in FIG. 6, and descriptions of the same functions are omitted. The intermittent operation control unit 50 includes a history acquisition unit 56.
　履歴取得部５６は、基地局１２と移動局１３との間の通信の発生履歴を取得する。例えば、履歴取得部５６は、ＰＤＣＣＨ上を流れる下りリンクデータの送信通知や、上りリンクスケジューリンググラント等の送信履歴を取得する。履歴取得部５６は、これらの信号の通信履歴に基づいて、基地局１２と移動局１３との通信の発生周期を算出する。通信時期設定部５４は、履歴取得部５６が算出した通信発生周期に基づいて繰り返し周期Ｔｒを決定する。 The history acquisition unit 56 acquires an occurrence history of communication between the base station 12 and the mobile station 13. For example, the history acquisition unit 56 acquires transmission history of downlink data flowing on the PDCCH, transmission history such as uplink scheduling grant. The history acquisition unit 56 calculates the generation cycle of communication between the base station 12 and the mobile station 13 based on the communication history of these signals. The communication time setting unit 54 determines the repetition cycle Tr based on the communication generation cycle calculated by the history acquisition unit 56.
　図１１は、基地局１２の動作の第２例を示す図である。オペレーションＣＡにおいて制御部４３は、移動局１３との間のＲＲＣ接続を確立する。オペレーションＣＢにおいて履歴取得部５６は、基地局１２と移動局１３との間の通信の発生履歴を収集する。オペレーションＣＣにおいて履歴取得部５６は、通信の発生履歴に基づいて基地局１２と移動局１３との通信の発生周期を算出する。 FIG. 11 is a diagram illustrating a second example of the operation of the base station 12. In operation CA, the control unit 43 establishes an RRC connection with the mobile station 13. In operation CB, the history acquisition unit 56 collects the occurrence history of communication between the base station 12 and the mobile station 13. In operation CC, the history acquisition unit 56 calculates the occurrence period of communication between the base station 12 and the mobile station 13 based on the occurrence history of communication.
　通信時期設定部５４は、履歴取得部５６が算出した通信発生周期に基づいて、繰り返し周期Ｔｒを決定する。通信時期設定部５４は、第２間欠周期Ｔ２と、繰り返し周期Ｔｒと、を第２タイマ５３に設定することにより第２通信期間の設定を行う。オペレーションＣＤ～ＣＨの動作は、図８のオペレーションＡＣ～ＡＧと同様である。 The communication time setting unit 54 determines the repetition cycle Tr based on the communication occurrence cycle calculated by the history acquisition unit 56. The communication time setting unit 54 sets the second communication period by setting the second intermittent period T2 and the repetition period Tr in the second timer 53. The operations CD to CH are the same as the operations AC to AG in FIG.
　本実施例によれば基地局１２と移動局１３との間の通信の発生履歴に基づいて繰り返し周期Ｔｒを決定することにより、第２通信期間の発生時期を、基地局１２と移動局１３との間の通信の発生時期に合わせることが可能になる。この結果、基地局１２と移動局１３との間の通信データを迅速に送信することができ、伝送遅延が低減される。このため、第１通信期間の間欠周期Ｔ１の長期化に伴うスループット低下を緩和することができる。 According to this embodiment, the repetition period Tr is determined based on the occurrence history of communication between the base station 12 and the mobile station 13, so that the occurrence time of the second communication period is determined between the base station 12 and the mobile station 13. It becomes possible to match with the time of occurrence of communication during the period. As a result, communication data between the base station 12 and the mobile station 13 can be transmitted quickly, and transmission delay is reduced. For this reason, it is possible to mitigate a decrease in throughput due to the extension of the intermittent period T1 of the first communication period.
　また、第１間欠周期Ｔ１より短い第２間欠周期Ｔ２で第２通信期間を繰り返すことにより、通信データの発生時刻がある第２通信期間に遅れても、後続の第２通信期間でこのデータを速やかに送信することができる。このため、通信データの発生周期の揺らぎや、繰り返し周期Ｔｒの算出誤差があっても、第２通信期間による送信に失敗して次の第１通信期間まで伝送が遅れる機会を低減できる。 In addition, by repeating the second communication period at the second intermittent period T2 shorter than the first intermittent period T1, even if the communication data generation time is delayed from the second communication period, the data is transmitted in the subsequent second communication period. It can be sent promptly. For this reason, even if there are fluctuations in the generation period of communication data and errors in calculating the repetition period Tr, it is possible to reduce the chance that transmission in the second communication period fails and transmission is delayed until the next first communication period.
　例えば、アプリケーションプログラムにおける通信周期は５分ごとや１０分ごとのようにユーザが任意に設定することがあるが、間欠動作の反復周期の設定値は２のべき乗の値を使用して定められることがある。このため、実際の通信データの発生周期と繰り返し周期Ｔｒの設定値の間に差が生じることがある。本実施例によれば、このような繰り返し周期Ｔｒの値の誤差があっても複数の第２通信期間のいずれかによって通信データが送信されることを期待できる。 For example, the communication period in the application program may be arbitrarily set by the user every 5 minutes or every 10 minutes, but the setting value of the repetition period of the intermittent operation should be determined using a power of 2 value. There is. For this reason, a difference may occur between the actual communication data generation period and the set value of the repetition period Tr. According to the present embodiment, it can be expected that communication data is transmitted in any of the plurality of second communication periods even if there is such an error in the value of the repetition period Tr.
　＜４．第３実施例＞
　続いて、基地局１２の他の実施例について説明する。本実施例では、基地局１２と移動局１３との無線通信により通信データが伝送されるアプリケーションプログラムから、このプログラムによる通信の発生周期の設定を受信する。例えば基地局１２は、移動局１３で動作するアプリケーションプログラムや移動局１３との通信を行うサーバ装置で動作するアプリケーションプログラムから、プログラムによる通信周期の設定を照会する。 <4. Third Example>
Next, another embodiment of the base station 12 will be described. In the present embodiment, the setting of the generation cycle of communication by this program is received from an application program in which communication data is transmitted by wireless communication between the base station 12 and the mobile station 13. For example, the base station 12 inquires about the setting of the communication cycle by the program from the application program that operates in the mobile station 13 or the application program that operates in the server device that communicates with the mobile station 13.
　図１２は、基地局１２の機能構成の第３例を示す図である。図６に示す構成要素と同様の構成要素には図６で使用した参照符号と同じ参照符号を付し、同一の機能については説明を省略する。間欠動作制御部５０は、周期情報取得部５７を備える。周期情報取得部５７は、移動局１３で動作するアプリケーションプログラム、例えば電子メールアプリケーションプログラム等に通信周期の設定を照会する。 FIG. 12 is a diagram illustrating a third example of the functional configuration of the base station 12. Components similar to those shown in FIG. 6 are given the same reference numerals as those used in FIG. 6, and descriptions of the same functions are omitted. The intermittent operation control unit 50 includes a period information acquisition unit 57. The period information acquisition unit 57 inquires of an application program that operates on the mobile station 13, for example, an e-mail application program, for the communication period setting.
　また、例えば移動局１３がアクセスネットワーク１１やコアネットワーク１５を介してサーバ装置と通信を行っている場合には、周期情報取得部５７は、サーバ装置で動作するアプリケーションプログラムに通信周期の設定を照会する。通信時期設定部５４は、周期情報取得部５７が取得したアプリケーションプログラムの設定に基づいて繰り返し周期Ｔｒを決定する。 For example, when the mobile station 13 communicates with the server device via the access network 11 or the core network 15, the cycle information acquisition unit 57 inquires the application program operating on the server device about the communication cycle setting. To do. The communication time setting unit 54 determines the repetition cycle Tr based on the application program settings acquired by the cycle information acquisition unit 57.
　図１３は、基地局１２の動作の第３例を示す図である。オペレーションＤＡにおいて制御部４３は、移動局１３との間のＲＲＣ接続を確立する。オペレーションＤＢにおいて制御信号送信部５１は、第１間欠周期Ｔ１及び間欠通信動作の開始時刻の情報を含んだ設定情報を移動局１３へ送信する。 FIG. 13 is a diagram illustrating a third example of the operation of the base station 12. In operation DA, the control unit 43 establishes an RRC connection with the mobile station 13. In the operation DB, the control signal transmission unit 51 transmits setting information including information on the first intermittent period T1 and the start time of the intermittent communication operation to the mobile station 13.
　オペレーションＤＣにおいて送信時期制御部５５は、現在が第１通信期間であるか否かを判断する。現在が第１通信期間である場合（オペレーションＤＣ：Ｙ）に動作はオペレーションＤＦへ進む。現在が第１通信期間でない場合（オペレーションＤＣ：Ｎ）に動作はオペレーションＤＤへ進む。 In operation DC, the transmission timing control unit 55 determines whether the current communication period is the first communication period. When the current communication period is the first communication period (operation DC: Y), the operation proceeds to operation DF. If the current time is not the first communication period (operation DC: N), the operation proceeds to operation DD.
　オペレーションＤＤにおいて送信時期制御部５５は、第２タイマ５３のための第２通信期間の設定が行われているか否かを判断する。第２通信期間の設定が完了している場合（オペレーションＤＥ：Ｙ）に動作はオペレーションＤＥへ進む。まだ第２通信期間の設定が完了していない場合（オペレーションＤＥ：Ｎ）に動作はオペレーションＤＧへ進む。 In operation DD, the transmission timing control unit 55 determines whether or not the second communication period for the second timer 53 has been set. When the setting of the second communication period is completed (operation DE: Y), the operation proceeds to operation DE. If the setting of the second communication period has not been completed (operation DE: N), the operation proceeds to operation DG.
　オペレーションＤＥにおいて送信時期制御部５５は、現在が第２通信期間であるか否かを判断する。現在が第２通信期間である場合（オペレーションＤＥ：Ｙ）に動作はオペレーションＤＦへ進む。現在が第２通信期間でない場合（オペレーションＤＥ：Ｎ）に動作はオペレーションＤＪへ進む。オペレーションＤＦにおいて送信時期制御部５５は、移動局１３へ送信される下りリンクデータがある場合に、ＰＤＣＣＨ及び下りリンクデータを送信する。無線通信部４０は、移動局１３からの上りリンクデータを受信する。その後に動作はオペレーションＤＪへ進む。 In operation DE, the transmission timing control unit 55 determines whether the current communication period is the second communication period. If the current communication period is the second communication period (operation DE: Y), the operation proceeds to operation DF. If the current time is not the second communication period (operation DE: N), the operation proceeds to operation DJ. In operation DF, the transmission timing control unit 55 transmits the PDCCH and the downlink data when there is downlink data to be transmitted to the mobile station 13. The radio communication unit 40 receives uplink data from the mobile station 13. Thereafter, the operation proceeds to operation DJ.
　オペレーションＤＧにおいて周期情報取得部５７は、基地局１２と移動局１３の間で通信データが伝送されるアプリケーションプログラムに通信の発生周期の設定を照会する。オペレーションＤＨにおいて通信時期設定部５４は、周期情報取得部５７が取得したアプリケーションプログラムの設定に基づいて繰り返し周期Ｔｒを決定する。通信時期設定部５４は、第２間欠周期Ｔ２と繰り返し周期Ｔｒを第２タイマ５３に設定することにより第２通信期間の設定を行う。 In operation DG, the period information acquisition unit 57 inquires the application program in which communication data is transmitted between the base station 12 and the mobile station 13 about the setting of the communication generation period. In operation DH, the communication time setting unit 54 determines the repetition cycle Tr based on the setting of the application program acquired by the cycle information acquisition unit 57. The communication time setting unit 54 sets the second communication period by setting the second intermittent period T2 and the repetition period Tr in the second timer 53.
　オペレーションＤＩにおいて制御信号送信部５１は、第２間欠周期Ｔ２、繰り返し周期Ｔｒ及び間欠通信動作の開始時刻の情報を含んだ設定情報を移動局１３へ送信する。オペレーションＤＪにおいて移動局１３との間のＲＲＣ接続が切断されるか、若しくは移動局１３が待ち受け状態になるか否かを判断する。ＲＲＣ接続が切断されるか、移動局１３が待ち受け状態になる場合（オペレーションＤＪ：Ｙ）に動作が終了する。ＲＲＣ接続が維持され且つ移動局１３が待ち受け状態にならない場合（オペレーションＤＪ：Ｎ）に動作はオペレーションＤＣへ戻る。 In operation DI, the control signal transmission unit 51 transmits setting information including information on the second intermittent period T2, the repetition period Tr, and the start time of the intermittent communication operation to the mobile station 13. In operation DJ, it is determined whether the RRC connection with the mobile station 13 is disconnected or whether the mobile station 13 is in a standby state. The operation ends when the RRC connection is disconnected or the mobile station 13 enters a standby state (operation DJ: Y). When the RRC connection is maintained and the mobile station 13 does not enter the standby state (operation DJ: N), the operation returns to operation DC.
　本実施例においても第２通信期間の発生時期を、基地局１２と移動局１３との間の通信の発生時期に合わせることが可能になる。この結果、基地局１２と移動局１３との間の通信データの伝送遅延が低減され、第１通信期間の間欠周期Ｔ１の長期化に伴うスループット低下を緩和することができる。 Also in the present embodiment, it is possible to match the generation time of the second communication period with the generation time of communication between the base station 12 and the mobile station 13. As a result, the transmission delay of the communication data between the base station 12 and the mobile station 13 is reduced, and it is possible to mitigate the decrease in throughput due to the extension of the intermittent period T1 in the first communication period.
　なお、上記実施の周期情報取得部５７は、基地局１２と移動局１３の間で通信データが伝送されるアプリケーションプログラムから、その通信周期の設定を取得した。これに加えてこれに代えて、周期情報取得部５７は、基地局１２と移動局１３の間で通信データが伝送されるアプリケーションプログラムを特定してよい。 In addition, the said period information acquisition part 57 acquired the setting of the communication period from the application program in which communication data are transmitted between the base station 12 and the mobile station 13. FIG. In addition to this, the period information acquisition unit 57 may specify an application program in which communication data is transmitted between the base station 12 and the mobile station 13.
　例えば、周期情報取得部５７は、基地局１２と移動局１３の間で伝送されるパケットのヘッダ情報等から、このパケットを送信するアプリケーションを特定する。周期情報取得部５７は、各アプリケーションについて典型的な通信周期を記憶したデータベースから、特定したアプリケーションの通信周期を取得してもよい。 For example, the period information acquisition unit 57 specifies an application that transmits this packet from the header information of the packet transmitted between the base station 12 and the mobile station 13. The cycle information acquisition unit 57 may acquire the communication cycle of the identified application from a database that stores a typical communication cycle for each application.
　ここに記載されている全ての例及び条件的な用語は、読者が、本発明と技術の進展のために発明者により与えられる概念とを理解する際の助けとなるように、教育的な目的を意図したものであり、具体的に記載されている上記の例及び条件、並びに本発明の優位性及び劣等性を示すことに関する本明細書における例の構成に限定されることなく解釈されるべきものである。本発明の実施例は詳細に説明されているが、本発明の精神及び範囲から外れることなく、様々な変更、置換及び修正をこれに加えることが可能であると解すべきである。 All examples and conditional terms contained herein are intended for educational purposes only to assist the reader in understanding the present invention and the concepts provided by the inventor for the advancement of technology. And should not be construed as being limited to the examples and conditions set forth above, as well as the configuration of the examples herein with respect to showing the superiority and inferiority of the present invention. Is. While embodiments of the present invention have been described in detail, it should be understood that various changes, substitutions and modifications can be made thereto without departing from the spirit and scope of the present invention.
　１０　　通信システム
　１２、１２ａ～１２ｃ　　基地局装置
　１３　　移動局装置
　４０、６０　　無線通信部
　５０、７０　　間欠動作制御部
　５６　　履歴取得部
　５７　　周期情報取得部 DESCRIPTION OF SYMBOLS 10 Communication system 12, 12a-12c Base station apparatus 13 Mobile station apparatus 40, 60 Wireless communication part 50, 70 Intermittent operation control part 56 History acquisition part 57 Period information acquisition part

Claims (10)

  1. 　移動局装置との無線通信を行う通信部と、
    　前記通信部が、第１間欠周期で前記移動局装置と不連続な通信を行い、かつ前記第１間欠周期とは別に定められた繰り返し周期毎に、前記第１間欠周期よりも短い第２間欠周期で前記移動局装置と不連続な通信を行うように、前記移動局装置との通信時期を制御する通信制御部と、
    　を備えることを特徴とする基地局装置。     A communication unit that performs wireless communication with the mobile station device;
    The communication unit performs discontinuous communication with the mobile station apparatus at a first intermittent period, and is a second intermittent period shorter than the first intermittent period at every repetition period determined separately from the first intermittent period. A communication control unit for controlling a communication timing with the mobile station apparatus so as to perform discontinuous communication with the mobile station apparatus at a cycle;
    A base station apparatus comprising:
  2. 　前記移動局装置との無線通信の態様に応じて前記繰り返し周期を決定する周期決定部を備える請求項１に記載の基地局装置。 The base station apparatus according to claim 1, further comprising a period determining unit that determines the repetition period according to a mode of wireless communication with the mobile station apparatus.
  3. 　前記周期決定部は、前記移動局装置との無線通信の発生履歴に応じて前記繰り返し周期を決定することを特徴とする請求項２に記載の基地局装置。 The base station apparatus according to claim 2, wherein the period determining unit determines the repetition period according to a history of occurrence of wireless communication with the mobile station apparatus.
  4. 　前記周期決定部は、前記基地局装置と前記移動局装置との無線通信により通信データが伝送されるアプリケーションプログラムから前記繰り返し周期の指定情報を受信することを特徴とする請求項２に記載の基地局装置。 3. The base according to claim 2, wherein the period determining unit receives the designation information of the repetition period from an application program in which communication data is transmitted by wireless communication between the base station apparatus and the mobile station apparatus. Station equipment.
  5. 　前記周期決定部は、前記基地局装置と前記移動局装置との無線通信により通信データが伝送されるアプリケーションプログラムを検出する検出部を備え、前記アプリケーションプログラムに応じて前記繰り返し周期を決定することを特徴とする請求項２に記載の基地局装置。 The cycle determination unit includes a detection unit that detects an application program in which communication data is transmitted by wireless communication between the base station device and the mobile station device, and determines the repetition cycle according to the application program. The base station apparatus according to claim 2, wherein:
  6. 　前記周期決定部は、前記第１間欠周期とは無関係に前記繰り返し周期を決定する請求項２に記載の基地局装置。 The base station apparatus according to claim 2, wherein the period determining unit determines the repetition period regardless of the first intermittent period.
  7. 　基地局装置との無線通信を行う通信部と、
    　前記通信部が、第１間欠周期で前記基地局装置と不連続な通信を行い、かつ前記第１間欠周期とは別に定められた繰り返し周期毎に、前記第１間欠周期よりも短い第２間欠周期で前記基地局装置と不連続な通信を行うように、前記基地局装置との通信時期を制御する通信制御部と、
    　を備えることを特徴とする移動局装置。     A communication unit that performs wireless communication with the base station device;
    The communication unit performs discontinuous communication with the base station apparatus at a first intermittent period, and is a second intermittent period shorter than the first intermittent period at each repetition period determined separately from the first intermittent period. A communication control unit for controlling a communication timing with the base station apparatus so as to perform discontinuous communication with the base station apparatus in a cycle;
    A mobile station apparatus comprising:
  8. 　第１間欠周期で不連続な通信を行い、かつ前記第１間欠周期とは別に定められた繰り返し周期毎に、前記第１間欠周期よりも短い第２間欠周期で不連続な通信を行うように、基地局装置と移動局装置との間の通信許可期間を設定し、
    　設定された前記通信許可期間において、前記基地局装置と前記移動局装置とに無線通信を実行させる、ことを特徴とする通信方法。     Discontinuous communication is performed in the first intermittent period, and discontinuous communication is performed in the second intermittent period shorter than the first intermittent period for each repetition period determined separately from the first intermittent period. , Set a communication permission period between the base station device and the mobile station device,
    A communication method characterized by causing the base station apparatus and the mobile station apparatus to perform wireless communication in the set communication permission period.
  9. 　基地局装置と前記基地局装置と通信する移動局装置を有する無線通信システムにおいて、
    　前記基地局装置は、
    　移動局装置との無線通信を行う第１通信部と、
    　前記通信部が、第１間欠周期で前記移動局装置と不連続な通信を行い、かつ前記第１間欠周期とは別に定められた繰り返し周期毎に、前記第１間欠周期よりも短い第２間欠周期で前記移動局装置と不連続な通信を行うように、前記移動局装置との通信時期を制御する通信制御部と、を備え、
    　前記移動局装置は、
    　前記第１間欠周期および前記第２間欠周期において、基地局装置との無線通信を行う第２通信部を備えた、
    　ことを特徴とする無線通信システム。     In a radio communication system having a base station apparatus and a mobile station apparatus communicating with the base station apparatus,
    The base station device
    A first communication unit that performs wireless communication with the mobile station device;
    The communication unit performs discontinuous communication with the mobile station apparatus at a first intermittent period, and is a second intermittent period shorter than the first intermittent period at every repetition period determined separately from the first intermittent period. A communication control unit for controlling a communication timing with the mobile station device so as to perform discontinuous communication with the mobile station device at a period,
    The mobile station device
    In the first intermittent cycle and the second intermittent cycle, comprising a second communication unit for performing wireless communication with a base station device,
    A wireless communication system.
  10. 　基地局装置と前記基地局装置と通信する移動局装置を有する無線通信システムに用いられる通信方法において、
    　前記基地局装置は、第１間欠周期で前記移動局装置と不連続な通信を行い、かつ前記第１間欠周期とは別に定められた繰り返し周期毎に、前記第１間欠周期よりも短い第２間欠周期で前記移動局装置と不連続な通信を行うように、前記移動局装置との通信時期を制御し、
    　前記移動局装置は、前記第１間欠周期および前記第２間欠周期において、基地局装置との無線通信を行う、
    　ことを特徴とする通信方法。     In a communication method used in a radio communication system having a base station apparatus and a mobile station apparatus communicating with the base station apparatus,
    The base station apparatus performs discontinuous communication with the mobile station apparatus at a first intermittent period, and has a second period shorter than the first intermittent period at every repetition period determined separately from the first intermittent period. Control the communication time with the mobile station device so as to perform discontinuous communication with the mobile station device in an intermittent cycle,
    The mobile station apparatus performs wireless communication with a base station apparatus in the first intermittent period and the second intermittent period.
    A communication method characterized by the above.
PCT/JP2012/061457 2012-04-27 2012-04-27 Base station device, mobile station device, and communication method WO2013161084A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/JP2012/061457 WO2013161084A1 (en) 2012-04-27 2012-04-27 Base station device, mobile station device, and communication method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2012/061457 WO2013161084A1 (en) 2012-04-27 2012-04-27 Base station device, mobile station device, and communication method

Publications (1)

Publication Number Publication Date
WO2013161084A1 true WO2013161084A1 (en) 2013-10-31

Family

ID=49482449

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/JP2012/061457 WO2013161084A1 (en) 2012-04-27 2012-04-27 Base station device, mobile station device, and communication method

Country Status (1)

Country Link
WO (1) WO2013161084A1 (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110677902A (en) * 2019-09-30 2020-01-10 重庆智慧水务有限公司 Method for wireless gateway to cover and call wireless network node and computer readable storage medium

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008155910A1 (en) * 2007-06-19 2008-12-24 Panasonic Corporation Radio transmitting/receiving method and radio communication terminal
JP2011114394A (en) * 2009-11-24 2011-06-09 Panasonic Electric Works Co Ltd Radio communication system
JP2012010202A (en) * 2010-06-25 2012-01-12 Sony Corp Communication apparatus and communication method, and communication system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2008155910A1 (en) * 2007-06-19 2008-12-24 Panasonic Corporation Radio transmitting/receiving method and radio communication terminal
JP2011114394A (en) * 2009-11-24 2011-06-09 Panasonic Electric Works Co Ltd Radio communication system
JP2012010202A (en) * 2010-06-25 2012-01-12 Sony Corp Communication apparatus and communication method, and communication system

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN110677902A (en) * 2019-09-30 2020-01-10 重庆智慧水务有限公司 Method for wireless gateway to cover and call wireless network node and computer readable storage medium

Similar Documents

Publication Publication Date Title
RU2453072C2 (en) Method of transmitting data using mobile station during intermittent reception
CN102651908B (en) Method and equipment for transmitting data
JP5673448B2 (en) COMMUNICATION DEVICE, COMMUNICATION METHOD, COMMUNICATION SYSTEM, AND BASE STATION
EP2832179A1 (en) Controlling a radio resource control connection between a base station and a user equipment
US11490400B2 (en) End node, relay node, and methods performed therein for handling transmission of information
CN112312589B (en) Energy-saving signal transmission method, base station and terminal equipment
JP6513222B2 (en) Method and apparatus for transmitting device to device (D2D) synchronization signal
US20170078963A1 (en) Terminal device, base station, wireless telecommunications system and methods for transitioning between two modes of operation
KR20150128493A (en) Method and apparatus of synchronization in a device to device communication system
JP6295964B2 (en) Wireless communication method, wireless communication system, and wireless base station
CN111629404B (en) Communication method and device
CN114342461A (en) Method and communication device for transmitting data
JP2013055393A (en) Communication device, communication method, communication system, and base station
US20150124639A1 (en) Wireless communication method, wireless communication system, base station, and wireless terminal
US20230171014A1 (en) Technique for determining radio device residence time and scheduling
CN110351871B (en) Method, apparatus and storage medium for indicating minimum scheduling delay
CN111770582B (en) Method and device for determining resources
US20140113642A1 (en) Base station, terminal, and cell assignment method
US20190182772A1 (en) A first communications device and a method therein for handling of active mode operation
WO2013161084A1 (en) Base station device, mobile station device, and communication method
JP6949004B2 (en) Terminal, base station, system, and system information acquisition method
CN113303002B (en) Communication method and device
US9729302B2 (en) Apparatus and method for controlling resources in a core network
JP5733423B2 (en) Base station, wireless terminal, wireless communication system, and wireless communication method
KR101691561B1 (en) Method for transmitting and receiving signal in heterogeneous transmission power based wireless communication system

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 12875361

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 12875361

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: JP