WO2009119477A1 - Système de communication, dispositif de station de base et dispositif de station mobile - Google Patents

Système de communication, dispositif de station de base et dispositif de station mobile Download PDF

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Publication number
WO2009119477A1
WO2009119477A1 PCT/JP2009/055595 JP2009055595W WO2009119477A1 WO 2009119477 A1 WO2009119477 A1 WO 2009119477A1 JP 2009055595 W JP2009055595 W JP 2009055595W WO 2009119477 A1 WO2009119477 A1 WO 2009119477A1
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WIPO (PCT)
Prior art keywords
period
mbms service
intermittent reception
mbms
overlap
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PCT/JP2009/055595
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English (en)
Japanese (ja)
Inventor
平川功
山田昇平
中嶋大一郎
鈴木翔一
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シャープ株式会社
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Publication of WO2009119477A1 publication Critical patent/WO2009119477A1/fr

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    • 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
    • H04W72/00—Local resource management
    • H04W72/30—Resource management for broadcast services
    • 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 present invention relates to a communication system, a base station apparatus, and a mobile station apparatus, and more particularly to a communication technique that performs an MBMS service in a mixed cell and performs an intermittent reception method on the mobile station apparatus side.
  • EUTRA evolved third generation radio access
  • EUTRA evolved third generation radio access
  • Evolved Universal Terrestrial Radio Access evolved third generation radio access network
  • EUTRA evolved third generation radio access network
  • FIG. 14 is a diagram illustrating a channel configuration example in EUTRA.
  • the EUTRA downlink (communication from the base station to the mobile station) includes a downlink multicast channel (PMCH: Physical Multichannel), a downlink shared channel (PDSCH: Physical Downlink Shared Channel), and a downlink control channel (PDCCH: It consists of a Physical Downlink Control Channel) and a downlink broadcast channel (PBCH: Physical Boradcast Channel).
  • PMCH Physical Multichannel
  • PDSCH Physical Downlink Shared Channel
  • PDCCH downlink control channel
  • PBCH Physical Boradcast Channel
  • the uplink of EUTRA (communication from a mobile station to a base station) includes a random access channel (RACH: Random Access Channel), an uplink shared channel (PUSCH: Physical Uplink Shared Channel), and an uplink control channel (PUCCH: Physical). Uplink Control Channel) (for example, see Non-Patent Document 1 below).
  • RACH Random Access Channel
  • PUSCH Physical Uplink Shared Channel
  • PUCCH Physical Uplink Control Channel
  • FIG. 15 is a diagram illustrating an example of a frame configuration in the downlink in EUTRA (see Non-Patent Document 2 below). Data transmission to the mobile station apparatus is performed in units of subframes (1 ms each from # 0 to # 9). Ten subframes are collectively referred to as a radio frame. In the figure, radio frames F11 and F12 (10 ms units) are shown.
  • the MBMS service is a service that provides a broadcast service over a plurality of cells at the same time and at the same frequency.
  • a cell that provides an MBMS service a cell (MBMS) that specializes in MBMS transmission using a frequency different from the frequency used for unicast transmission (transmission from a single cell to individual receivers).
  • MBMS Multimedia Boradcast Multicast Service
  • FIG. 16 is a diagram illustrating an arrangement example of mixed cells. As shown in FIG. 16, it is determined which subframe is used for the MBMS service in one radio frame composed of 10 MBMS subframes, and what interval is used for the radio frame including the MBMS service. It is decided whether or not to repeat. This arrangement information is called an MBMS subframe allocation pattern (MBSAP), and this pattern is notified from the base station apparatus to the mobile station apparatus in advance.
  • MMSAP MBMS subframe allocation pattern
  • the mobile station apparatus can know in which subframe the MBMS service is implemented.
  • a subframe that is set as an MBMS service may be provided by this MBMS subframe arrangement pattern is called an MBMS subframe.
  • data may be transmitted to individual receiving terminals.
  • “1”, “2”, “4”, “6”, “7”, “8”, “9” are MBMS subframes (subframes indicated by hatching). ).
  • FIG. 17 is a diagram showing an outline of the DRX control technology.
  • the mobile station apparatus repeats an on-duration and a DRX opportunity (opportunity for DRX) at DRX cycle (repetition period) intervals.
  • DRX cycle repetition period
  • the on period is a period composed of one subframe or a plurality of subframes in which the mobile station apparatus is determined to monitor the PDCCH.
  • the base station apparatus transmits a PDCCH in order to start uplink or downlink resource allocation in the on period.
  • the mobile station apparatus that has received the PDCCH (indicated by a white arrow) indicating the scheduling of uplink or downlink initial transmission data (new data) monitors the PDCCH for a certain period exceeding the on period. (Monitoring period after receiving PDCCH).
  • the mobile station apparatus monitors the PDCCH regardless of whether it is an on period.
  • a period in which the mobile station apparatus activates the reception unit and the reception unit is awake is referred to as an active period (Active Time).
  • the base station device transmits data while the mobile station device is active. From the base station apparatus to the mobile station apparatus, the repetition period and ON period of the DRX cycle are notified in advance, and the mobile station apparatus periodically repeats power-on in advance based on the information, and the reception status of PDCCH, The power is turned on according to the data retransmission status (see Non-Patent Document 3).
  • 3GPP TS Technical Specification 36.300 V8.3.0 (2007-12), Evolved Universal Terrestrial Radio Access (EUTRA) and Evolved Universal Terrestrial Radio Access Network (EUTRAN); Overall description; Stage2 (Release 8) 3GPP TSG-RAN WG2 # 60bis R2-080198 Signaling of MBSFN Subframe Allocations Severa, January 14-18, 2008 3GPP TS 36.321 V8.0.0 (2007-12) Technical Specification 3rd Generation Partnership Project; Technical Specification Group Radio Access Network; Evolved Universal Terrestrial Radio Access (E-UTRA) Medium Access Control (MAC) protocol specification (Release 8 )
  • DRX When performing DRX control, it is necessary to match the data transmission timing of the base station apparatus with the activity period of the mobile station apparatus. Time information such as the DRX cycle and the ON period is notified in advance from the base station apparatus, and the mobile station apparatus flexibly controls the activity period and the DRX opportunity according to the information and the reception status of the PDCCH. In EUTRA, DRX is enabled by notifying such minimum information.
  • the base station apparatus transmits only the MBMS service when the period during which the MBMS service is performed overlaps with the active period in the DRX control of the mobile station apparatus. Data cannot be transmitted to the station device. Therefore, normally, the transmission period of the MBMS subframe and the DRX cycle are synchronized so that the active period in the DRX control does not overlap with the MBMS subframe.
  • FIG. 18 is a diagram showing this relationship. As shown in FIG. 18, the MBMS service is performed in a cycle of 4 radio frames (40 ms) such that F1 follows F5. In the radio frames F1, F5, F9,. 6 and 7 are assigned to the MBMS subframe.
  • the DRX cycle is 20 ms, and it is assumed that there are two subframes in 20 ms and an ON period in DRX control.
  • both can be compatible without overlapping.
  • the radio frame in which the MBMS subframe exists is arranged such that the ON period in the DRX control comes like the mobile station apparatus B, the on period in the DRX control is set in the subframe in which the MBMS subframe does not exist.
  • the subframe in which the MBMS subframe exists and the ON period in the DRX control overlap. Accordingly, data cannot be transmitted in a subframe in which an MBMS subframe exists, and data cannot be transmitted. That is, when assigning the ON period in the DRX control to the receiver, the degree of freedom of assignment is limited.
  • the radio frame in which the MBMS subframe exists is set to 40 ms, which is twice the activity cycle (20 ms) in the DRX control, has been described, but even when the frequency of the MBMS service is low and 160 ms is set.
  • the degree of freedom to which the ON period in DRX control is assigned does not change. That is, there is a problem that inefficiency occurs when the frequency of MBMS service is low.
  • the arrangement like the mobile station apparatus C becomes a problem when the arrangement pattern for performing the MBMS service is rearranged.
  • subframes allocated to the MBMS service may be rearranged for effective use of radio resources.
  • MBMS is provided with services using the same subframe arrangement pattern in a plurality of cells. Therefore, the number of receiving terminals that perform DRX control included in these cells is considerable.
  • MBMS subframes are increased and rearranged, it is very difficult to secure subframes that are not used by all the receiving terminals.
  • the present invention has an object to provide a communication technique that allows data transmission and reception by a mobile station apparatus even when the intermittent reception period and the MBMS service period overlap.
  • the scheduling means includes an MBMS service. If the MBMS service period and the data transmission period to the receiver overlap, the data transmission period to the receiver is moved outside the MBMS service period.
  • a mobile station apparatus having a function of performing transmission and performing intermittent reception has a function of performing reception by expanding the intermittent reception period when the intermittent reception period and the MBMS service period overlap.
  • the scheduling means has a function of performing transmission by moving the data transmission period to the subsequent receiver outside the MBMS service period when the MBMS service period and the data transmission period to the receiver overlap.
  • the mobile station apparatus that performs reception has a function of performing reception by expanding the subsequent intermittent reception period when the intermittent reception period and the MBMS service period overlap.
  • the base station apparatus uses a predetermined period as an extension period or a movement period that extends or moves the intermittent reception period from the overlap period. Or, by notifying, it is avoided to notify the mobile station apparatus of the extension period again when overlapping.
  • FIG. 3 shows another example in which the states of the timer are shown together.
  • FIG. 3 shows the 1st example which makes an extension period the period which does not contain a MBMS sub-frame.
  • the 2nd example which makes an extended period the period which does not contain a MBMS sub-frame.
  • FIG. 1 is a functional block diagram showing a configuration example of a base station apparatus according to an embodiment of the present invention.
  • the base station apparatus 100 includes a data control unit 101, an OFDM modulation unit 102, a radio unit 103, a scheduling unit 104, and an upper layer 105.
  • the data control unit 101 receives input of control data, user data, and MBMS data from the scheduling unit 104, and transmits control data to a downlink control channel and a downlink broadcast channel based on scheduling information input from the scheduling unit 104. And mapped to the downlink shared channel. Further, user data for the mobile station apparatus is mapped to a downlink shared channel (PDSCH). The MBMS data is mapped to the downlink multicast channel. Each mapped data is output to OFDM modulation section 102.
  • PDSCH downlink shared channel
  • the information regarding the MBMS subframe arrangement pattern and DRX is mapped to the downlink shared channel and transmitted to the mobile station apparatus.
  • the OFDM modulation unit 102 performs data modulation, serial / parallel conversion of input signals, IFFT (Inverse Fast Fourier Transform) processing, CP (Cyclic Prefix) insertion on the data input from the data control unit 101
  • OFDM signal processing such as filtering is performed to generate an OFDM signal and output it to the radio section 103.
  • Radio section 103 up-converts the modulation data input from OFDM modulation section 102 to a radio frequency to generate a radio signal, and transmits the radio signal to a mobile station apparatus via an antenna (not shown).
  • the scheduling unit 104 performs transmission signal scheduling.
  • a schedule for MBMS data transmission is instructed by the upper layer 105.
  • the user data and control data for the mobile station apparatus are adjusted with the user data for other mobile station apparatuses in consideration of the amount of user data transmitted from the upper layer 105 and the availability of radio resources. Schedule.
  • the scheduling information is output to the data control unit 101.
  • the mobile station apparatus repeats an on-duration and a DRX opportunity (opportunity for DRX) at DRX cycle (repetition period) intervals.
  • DRX cycle repetition period
  • the ON period and the DRX cycle are specified, the DRX opportunity is uniquely determined.
  • This ON period is a period composed of one subframe or a plurality of subframes that are determined so that the mobile station apparatus monitors the PDCCH.
  • the base station apparatus transmits the PDCCH to start uplink or downlink resource allocation in the on period.
  • an On-duration Timer (on period timer) is activated, and the PDCCH is monitored until an expiration value (expire value) is reached.
  • the mobile station apparatus that has received the PDCCH indicating scheduling of uplink or downlink initial transmission data (new data) monitors the PDCCH for a certain period exceeding the on period.
  • DRX Inactivity Timer intermittent reception inactivity timer is used for this fixed period of computation.
  • the mobile station apparatus that has received the PDCCH indicating scheduling of uplink or downlink initial transmission data (new data) in the ON period activates DRX Inactivity Timer and the expiration value of DRX Inactivity Timer specified by the base station device PDCCH is monitored until
  • the mobile station apparatus monitors the PDCCH regardless of the on period.
  • HARQ RTT Timer hybrid automatic retransmission request round trip time timer
  • DRX Retransmission Timer intermittent reception retransmission timer
  • the mobile station apparatus activates the receiving unit, and the period in which the mobile station apparatus is awake is called an active period (Active (Time).
  • DRX InactivityrTimer or DRX Retransmission Timer or On-duration Timer keeps timing.
  • the base station device transmits data while the mobile station device is active.
  • the base station apparatus notifies the mobile station apparatus in advance of the repetition period and ON period of the DRX cycle, and the mobile station apparatus periodically repeats power-on in advance based on the information and the reception status of the PDCCH and data Power on according to the retransmission status.
  • the method of extending the activity period includes a method of extending the on period or the activity period when the MBMS subframe and the on period collide, and a method of extending the activity period when the MBMS subframe and the activity period collide. There is.
  • control is performed depending on whether the On-duration Timer, DRX Inactivity Timer, and DRX Retransmission Timer are counted up.
  • the extension period there are a method of handling the MBMS subframe as a DRX opportunity and a method of continuously monitoring the MBMS subframe.
  • FIG. 2 is a timing chart when the active period in the DRX control is extended when the ON period and the MBMS transmission subframe overlap.
  • the mobile station apparatus is notified in advance of the DRX cycle and the length of the on period from the base station apparatus.
  • an MBMS subframe arrangement pattern (MSAP) indicating the arrangement of subframes (MBMS subframes) set as the MBMS service may be provided is also notified.
  • the extension amount when the MBMS service and the ON period in the DRX control overlap is notified.
  • the DRX cycle of the mobile station apparatus is 20 subframes (20 ms)
  • the ON period is 2 subframes (2 ms)
  • the extension amount (indicated by arrow AR1) when overlapping is 3 subframes (3 ms).
  • the base station apparatus transmits data in subframe 1 every other radio frame accordingly. Although normal data is transmitted in one subframe, the ON period is usually set longer than this in consideration of the return accuracy during intermittent reception of the mobile station apparatus.
  • the subframe at this time Since the data (D1) for the mobile station apparatus to be transmitted in the frame 1 cannot be transmitted because the MBMS service is provided, the data is transmitted in the subframe 4 which is a subframe not provided for the next MBMS service ( D2).
  • the mobile station apparatus performs DRX and receives data based on the DRX cycle and on-period information notified from the base station apparatus, but the MBMS subframe arrangement pattern is notified. Therefore, it knows in which subframe the DRX and the MBMS service overlap. At this timing, the mobile station apparatus extends the on time based on the extension amount of the on time in the DRX control notified from the base station apparatus or the number of subframes in which the MBMS subframe overlaps with the on time (reference AR1). ) Perform DRX. Thereby, even the data transmitted by the base station apparatus out of the original time can be received.
  • the data transmission is shifted backward to extend the ON period in the DRX control.
  • the transmission is moved to a subframe in which the previous MBMS service is not performed, and the DRX control is turned on.
  • the period may be extended before.
  • the ON period in DRX control may be extended back and forth.
  • FIG. 3 An example in which the on-time is extended back and forth (arrows AR2, 3) is shown in FIG.
  • data transmission can be performed by moving the data from D1 to D4 to the front side.
  • the extension amount of the activity period in the DRX control may be calculated as a period including the MBMS subframe in the extended period, or may be calculated as a period not including the MBMS subframe.
  • the ON period timer (On-duration Timer) counts up even in the MBMS subframe, and expires when the on period is the MBMS subframe.
  • the value increases for example, the number of subframes in which the ON period and the MBMS subframe overlap each other is added to the set expiration value, or a predetermined value (set in the specification or set from the base station apparatus) is added. Added to the expiration value).
  • the on-time is extended when the on-period is an MBMS subframe.
  • the extension of the on period (AR4) is also an extension of the activity period.
  • the activity period here refers to a period during which the DRX Inactivity Timer, the DRX Retransmission Timer, or the On-duration Timer is counting.
  • FIG. 4 is a diagram showing the states of these timers together.
  • the on-time timer of the timer is extended for the time period counted by the addition of the expiration value.
  • the time measurement means counting the number of subframes in units of subframes.
  • Another method is to prepare MBMS Extend ⁇ Timer (MBMS extension timer) separately from On-duration Timer and set the number of sub-frames in which the ON period and MBMS sub-frames overlap or a predetermined number (set or set in the specification).
  • the value set from the base station apparatus is set as the expiration value of MBMSMBExtend Timer.
  • the On-duration Timer encounters an MBMS subframe
  • the MBMS Extend Timer is started immediately after the On-duration Timer expires, and the mobile station device continues to use the PDCCH while the MBMS Extend Timer is timing. Monitor.
  • the On-duration Timer and MBMS Extend Timer also count up in MBMS subframes.
  • the activity period refers to a period in which the DRX Inactivity Timer, DRX Retransmission Timer, On-duration Timer, or MBMS Extend Timer is timing.
  • FIG. 5 shows the states of these timers together.
  • the mobile station apparatus only has to extend the activity period in the DRX control only during the period determined as the extension amount, and there is an advantage that the processing becomes simple.
  • the On-duration Timer is not counted up in the MBMS subframe.
  • the subframe reaching the expiration value is postponed (AR6), and the on-time is extended.
  • the transmission timing is also changed from D1 to D5.
  • AR6 the extension of the on period is also the extension of the activity period.
  • the activity period here refers to a period during which the DRX Inactivity Timer, the DRX Retransmission Timer, or the On-duration Timer is counting.
  • FIG. 6A shows the states of these timers together.
  • an MBMS Extend Timer (MBMS extension timer) is prepared separately from the On-duration Timer, and the number of sub-frames where the ON period and the MBMS sub-frame overlap each other or predetermined
  • the value (set by specification or set from the base station device) is set as the expiration value of MBMS Extend Timer.
  • An MBMS subframe is encountered while the On-duration Timer is running, and the MBMS Extend Timer is started immediately after the On-duration Timer expires, and the mobile station device monitors the PDCCH while the MBMS Extend Timer is running. To do.
  • On-durationrTimer is also counted up in the MBMS subframe, but MBMS Extend Extension Timer is not counted up in the MBMS subframe (indicated by a dotted line). Accordingly, when the ON period overlaps with the MBMS subframe, the active time is extended (AR7).
  • the activity period refers to a period in which the DRX Inactivity Timer, DRX Retransmission Timer, On-duration Timer, or MBMS Extend Timer is timing.
  • the actual extension period varies depending on the number of MBMS subframes included in the period indicated as the extension period, but the mobile station apparatus knows in advance when and when the MBMS subframe exists. So there is no inconvenience.
  • the base station apparatus since the base station apparatus actually transmits data to be sent in a period overlapping with the MBMS subframe after the subframe that is not the next MBMS subframe, the base station apparatus overlaps regardless of the number of consecutive MBMS subframes. There is an advantage that the receiving side can receive data of a certain period.
  • FIG. 7 shows these examples again.
  • the extension amount of MBMS MBExtend Timer is 3 subframes.
  • the upper diagram showing the state of DRX is an example in which the extended period (AR8) is a period including MBMS subframes (in this case, three subframes).
  • the extended period (AR8) is a period including MBMS subframes (in this case, three subframes).
  • data to be transmitted in D1 is transmitted in 4 which is the next subframe excluding MBMS subframes 1 to 3 (D7).
  • the activity period is always extended by 3 subframes regardless of the arrangement of MBMS subframes.
  • the lower diagram is a diagram illustrating an example in which the extended period is a period not including the MBMS subframe.
  • the active period in the DRX control is extended so that a period not including the MBMS subframe is always included in the extended active period (AR9).
  • the position indicated by D8 is the data transmission position.
  • FIG. 8 is a diagram showing such an example.
  • the ON period overlaps with the MBMS transmission subframe
  • the DRX period is extended by 3 subframes without including the MBMS transmission subframe (AR10), and the transmitting side transmits the overlapped data between them.
  • data is originally transmitted in subframe 1 (D1), which overlaps with the MBMS subframe, and therefore within 3 subframes that are not subsequent MBMS subframes, that is, 3, 5, It is assumed that transmission is performed in 9 subframes.
  • the activity period is extended to 9 subframes. Since it is continuous, the active period in DRX control becomes long and the power consumption increases. Therefore, when MBMS subframes continue for a certain period or longer (here, MBMS subframes from 6 to 8), power consumption can be suppressed by stopping the extension of the active period in DRX control during that period. Thereafter, in 9 subframes, the mobile station apparatus again becomes an active period in the DRX control.
  • MBMS DRX Timer (MBMS DRX timer) is prepared.
  • the MBMS DRX timer measures time to temporarily suspend the active period during the period when MBMS subframes during the active period overlap.
  • the MBMS Extend Timer is started immediately after the On-duration Timer expires.
  • the mobile station apparatus also checks the number of consecutive MBMS subframes and the position thereof from the received MSAP information, and the number of consecutive frames is determined in advance (set in the specification or set from the base station apparatus.
  • the MBMS DRX Timer is started from the continuous position of the MBMS subframe with the continuous number as the expiration value.
  • the mobile station device monitors the PDCCH while the MBMS Extend Timer is counting, but when the MBMS DRX Timer is operating, it temporarily suspends the activity period even when the MBMS Extend Timer is operating (non-count-up unit, that is, dotted line) Part reference). Thereafter, when the MBMS DRX Timer expires, the mobile station apparatus returns to the active period (“9” subframe).
  • On-duration Timer and MBMS DRX Timer are also counted up in the MBMS subframe, but MBMS Extend Timer is not counted up in the MBMS subframe.
  • the activity period here refers to the period during which the DRX Inactivity Timer, DRX Retransmission Timer, On-duration Timer, or MBMS Extend Timer is running and the MBMS DRX Timer is not running.
  • FIG. 10 is a diagram illustrating an example of another method.
  • an On-duration Timer and an MBMS Extension Timer (MBMS extension timer)
  • MBMS extension limit timer MBMS Extension Limit Timer
  • the MBMS Extend Timer and MBMS Extend Limit Timer are started.
  • the mobile station apparatus monitors the PDCCH while the MBMS Extend Timer is timing.
  • the MBMS Extend Timer is stopped (extension abort) when the MBMS Extend Limit Timer expires (the end point of the arrow of AR14).
  • DRX is also extended to the same time as indicated by AR13.
  • the transmission data that was supposed to be transmitted in D1 is transmitted in 4 subframes as shown in D10.
  • the MBMS Extend Limit Timer is stopped when the MBMS Extend Timer expires (extension abort). That is, the expiration value of MBMS Extend Limit Timer is set as a limit value that limits the activity period so that it does not become too long.
  • the On-duration Timer and MBMS Extend Limit Timer are counted up in the MBMS subframe, but the MBMS Extend Timer is not counted up in the MBMS subframe as shown by the broken line.
  • the activity period refers to a period in which the DRX Inactivity Timer, DRX Retransmission Timer, On-duration Timer, or MBMS Extend Timer is timing. In the example shown in FIG. 8, only 9 subframes are in the active period in DRX control again. However, in consideration of the accuracy at the time of intermittent reception by the mobile station apparatus, an extra subframe active period is taken. May be.
  • FIG. 11 is a diagram illustrating an example of a communication technique according to another embodiment of the present invention.
  • the activity period in DRX control is shifted.
  • the upper DRX state is an example when the shift is not performed, and the lower DRX state is an example when the shift is performed. That is, when it overlaps with the MBMS subframe at the beginning of the DRX cycle, the On-duration Timer is not started, but waits for the next subframe not for MBMS (unicast subframe) (AR15), and the On-duration Timer Start up.
  • the data that should have been transmitted in D1 can be transmitted in the first subframe (D11) of the moved DRX period.
  • control is performed without extending the DRX period, so that an increase in power consumption of the mobile station apparatus can be suppressed.
  • the shift amount of the active period in the DRX control may be considered as a period including the MBMS subframe, or may be considered as a period not including the MBMS subframe, as in the case of extending. Furthermore, when the period in which MBMS subframes are continuous is short and includes an MBMS subframe, the MBMS subframe period may be temporarily inactive.
  • FIG. 12 is a diagram showing an example of a communication technique according to another embodiment of the present invention, and controls the active period in the DRX control so that it is always performed at the position after the shift.
  • control is performed so that the DRX time is shifted only when it overlaps the MBMS subframe.
  • transmission is performed in the shifted time even in the subframes after overlapping, and the active time in the DRX control is also performed in the shifted time.
  • the MBMS subframe arrangement pattern may be changed by changing the MBMS service.
  • FIG. 12 shows an example in which the MBMS service is performed every 4 radio frames (40 ms), and the MBMS arrangement pattern in the MBMS subframe changes in the middle.
  • the active period in DRX control is initially set to subframes 0 and 1 every two radio frames (20 ms) in synchronization with the cycle of the MBMS subframe arrangement pattern.
  • the active period in the DRX control is matched with a subframe without an MBMS subframe.
  • the arrangement pattern of the MBMS subframe is reset, so that it overlaps with the DRX period. .
  • the activity period in the DRX control is shifted, but this is repeated every 4 radio frames (40 ms) thereafter.
  • shifting is performed so as not to overlap with the MBMS subframe, and thereafter, the timing (subframes 4 and 5 in FIG. 12) is set as the active period in the DRX control. It is possible to avoid overlapping the subframe.
  • the mobile station apparatus since the timing for rearranging the MBMS subframe and information for the rearrangement are normally transmitted to the mobile station apparatus in advance, the mobile station apparatus determines the start timing of the shift of the active period in the DRX control. This can be performed in accordance with the timing of frame rearrangement.
  • the active period in the DRX control is extended when the ON period overlaps with the MBMS transmission subframe has been described.
  • the active period and the MBMS transmission subframe include A case where the activity period in the DRX control is extended in the case of overlapping will be described.
  • DRX is performed based on the DRX cycle and on-period information notified from the base station device, and data is received. Since the mobile station apparatus side is notified of the MBMS subframe arrangement pattern, it knows in which subframe the DRX and the MBMS service overlap. At this timing, the activity period is extended and DRX is performed. As a result, it is possible to receive even data transmitted by the base station apparatus out of the original time. That is, On-duration Timer, DRX Inactivity Timer, and DRX Retransmission Timer are not counted up in the MBMS subframe. This postpones the subframe that reaches the expiration value and prolongs the activity time.
  • FIG. 13 is a diagram illustrating an example of extending the activity period when MBMS subframes overlap during the operation of DRX Inactivity Timer.
  • the mobile station device After receiving the PDCCH, the mobile station device starts DRX Inactivity Timer and monitors the PDCCH until the expiration value of DRX Inactivity Timer designated by the base station device is exceeded.
  • DRX Inactivity Timer 3 subframes are designated as the expiration value of DRX Inactivity Timer will be described as an example. If MBMS transmission subframes overlap during this period (D1), the DRX Inactivity Timer is not counted up (start of the non-counting period indicated by the broken line: AR19), thereby extending the monitoring period after receiving the PDCCH. (AR17).
  • the base station apparatus performs data transmission during this extended period.
  • the PDCCH needs to be received during the on-period or activity period (that is, on-duration timer, DRX Inactivity Timer, DRX Retransmission Timer timing).
  • the on-period timer defines an on-period. In the embodiment shown in FIG. 13, the period is a fixed value regardless of the presence / absence of an MBMS subframe and the presence / absence of a PDCCH. Start and end at time. DRX Inactivity Timer and DRX Retransmission Timer are involved in extending the activity period. If the PDCCH is received in the meantime, the DRX Inactivity Timer is reset again to start counting up from the beginning, and as a result, the monitoring period (activity period) is extended.
  • the activity period can be extended even when it overlaps with the MBMS transmission subframe.
  • the activity period is set by, for example, introducing MBMS Extend Timer in the same manner as described for extending the activity period in DRX control. It may be extended.
  • the on period, the amount of extension of the activity period, the expiration value of the MBMS Extended Timer, the increase value of the expiration value, the presence / absence of counting up of each timer when overlapping with the subframe of MBMS transmission, etc. It may be a predetermined value or may be notified from the base station apparatus to the mobile station apparatus, but may be determined according to the arrangement pattern of the MBMS service period. For example, when the arrangement density of the MBMS service period is large, by increasing the increase value of the expiration value of the on period and the activity period, the data is set so that many unicast subframes are included in the extended activity period. Transmission and reception opportunities can be increased. At this time, by determining the method for deriving these values in common between the transmission device and the reception device, even when the MBMS service period arrangement pattern is changed, the base station device can notify the mobile station device. It can be omitted.
  • the present invention can be used for communication devices.

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

Abstract

L'invention porte sur un dispositif de station de base comprenant des moyens de planification pour planifier une période de transmission de données conformément à la période de réception intermittente d'un récepteur. Les moyens de planification ont des fonctions pour attribuer une période de service MBMS et une période d'action du récepteur d'une manière chevauchante et pour effectuer la transmission, lorsque la période de service MBMS et une période de transmission de données vers le récepteur se chevauchent, par déplacement de la période de transmission de données vers le récepteur, hors de la période de service MBMS. L'invention porte également sur un dispositif de station mobile pour des réceptions intermittentes, qui a une fonction permettant d’effectuer des réceptions, lorsque la période de réception intermittente et la période de service MBMS se chevauchent, par agrandissement de la période de réception intermittente. Selon une variante, les moyens de planification ont une fonction permettant d’effectuer la transmission, lorsque la période de service MBMS et une période de transmission de données vers le récepteur se chevauchent, par déplacement de la période de transmission de données suivante vers le récepteur, hors de la période de service MBMS. Le dispositif de station mobile pour réception intermittente a une fonction permettant d’effectuer des réceptions, lorsque la période de réception intermittente et la période de service MBMS se chevauchent, par agrandissement de la période de réception intermittente suivante. L'invention porte en outre sur un système pour effectuer le service MBMS avec une cellule mixte, qui peut éviter que les données ne puissent pas être transmises pour la période d'action dans une commande de réception discontinue (DRX) du dispositif de station mobile lorsque la période du service MBMS et la période d'action pour la commande DRX se chevauchent.
PCT/JP2009/055595 2008-03-24 2009-03-23 Système de communication, dispositif de station de base et dispositif de station mobile WO2009119477A1 (fr)

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EP2605555A3 (fr) * 2011-12-12 2013-09-11 Broadcom Corporation Fonctionnement en mode discontinu amélioré avec des ressources de fréquence radio partagées
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WO2015198105A1 (fr) * 2014-06-27 2015-12-30 Telefonaktiebolaget L M Ericsson (Publ) Système et procédé de prise en charge de services sensibles au temps dans un réseau de communication
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JP2013085309A (ja) * 2010-04-02 2013-05-09 Acer Inc コンポーネントキャリア（ｃｃ）のアクティベーションおよびディアクティベーションをハンドリングする方法、およびそのような方法を用いる通信機器
US9363059B2 (en) 2010-04-02 2016-06-07 Acer Incorporated Method of handling component carrier activation and deactivation and communication device thereof
US8908604B2 (en) 2010-04-28 2014-12-09 Panasonic Intellectual Property Corporation Of America Wireless communication apparatus and wireless communication method
WO2011135796A1 (fr) * 2010-04-28 2011-11-03 パナソニック株式会社 Appareil de communication sans fil et procédé de communication sans fil
JP5793137B2 (ja) * 2010-04-28 2015-10-14 パナソニック インテレクチュアル プロパティ コーポレーション オブアメリカＰａｎａｓｏｎｉｃ Ｉｎｔｅｌｌｅｃｔｕａｌ Ｐｒｏｐｅｒｔｙ Ｃｏｒｐｏｒａｔｉｏｎ ｏｆ Ａｍｅｒｉｃａ 無線通信装置及び無線通信方法
WO2012081093A1 (fr) * 2010-12-15 2012-06-21 富士通株式会社 Dispositif de communication sans fil
EP2654348A1 (fr) * 2010-12-15 2013-10-23 Fujitsu Limited Dispositif de communication sans fil
EP2654348A4 (fr) * 2010-12-15 2014-01-08 Fujitsu Ltd Dispositif de communication sans fil
JP5609990B2 (ja) * 2010-12-15 2014-10-22 富士通株式会社 無線通信装置
US8615227B2 (en) 2011-12-12 2013-12-24 Broadcom Corporation Enhanced discontinuous mode operation with shared radio frequency resources
US8774789B2 (en) 2011-12-12 2014-07-08 Broadcom Corporation Enhanced discontinuous mode operation with shared radio frequency resources
EP2605555A3 (fr) * 2011-12-12 2013-09-11 Broadcom Corporation Fonctionnement en mode discontinu amélioré avec des ressources de fréquence radio partagées
EP2989727A4 (fr) * 2013-04-24 2016-12-21 ERICSSON TELEFON AB L M (publ) Procédé drx à limitation tdm et équipement utilisateur l'utilisant
US9723556B2 (en) 2013-04-24 2017-08-01 Telefonaktiebolaget Lm Ericsson (Publ) DRX method with TDM limitation and user equipment using the same
WO2015198106A1 (fr) * 2014-06-25 2015-12-30 Telefonaktiebolaget L M Ericsson (Publ) Systèmes et procédés pour permettant la coexistence de services mbms et voip
US9681441B2 (en) 2014-06-25 2017-06-13 Telefonaktiebolaget L M Ericsson (Publ) Systems and methods for coexistence of MBMS and VoIP services
US9883483B2 (en) 2014-06-25 2018-01-30 Telefonaktiebolaget L M Ericsson (Publ) Systems and methods for coexistence of MBMS and VoIP services
WO2015198105A1 (fr) * 2014-06-27 2015-12-30 Telefonaktiebolaget L M Ericsson (Publ) Système et procédé de prise en charge de services sensibles au temps dans un réseau de communication
US10159109B2 (en) 2014-06-27 2018-12-18 Telefonaktiebolaget Lm Ericsson (Publ) System and method for supporting time-sensitive services in a communication network
EP3148270A1 (fr) * 2015-09-24 2017-03-29 Alcatel Lucent Transmission multipoint

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