WO2009096305A1 - 通信装置、通信方法 - Google Patents
通信装置、通信方法 Download PDFInfo
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- WO2009096305A1 WO2009096305A1 PCT/JP2009/050956 JP2009050956W WO2009096305A1 WO 2009096305 A1 WO2009096305 A1 WO 2009096305A1 JP 2009050956 W JP2009050956 W JP 2009050956W WO 2009096305 A1 WO2009096305 A1 WO 2009096305A1
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- mobile station
- station apparatus
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- request
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/30—Resource management for broadcast services
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W76/00—Connection management
- H04W76/20—Manipulation of established connections
- H04W76/27—Transitions between radio resource control [RRC] states
Definitions
- the present invention relates to communication technology, and in particular, to a mobile station device, a base station device, a communication system, a communication method, and a program.
- 3GPP 3rd Generation Partnership Project, 3rd Generation Partnership Project
- W-CDMA Wideband Code Division Multiple Access
- HSDPA High Speed Downlink Packet Access
- EUTRA Evolution of Third Generation wireless access
- an OFDM (Orthogonal-Frequency-Division-Multiplexing) scheme has been proposed.
- an adaptive modulation / demodulation and error correction scheme (AMCS) based on adaptive radio link control (link adaptation, link adaptation) such as channel coding is applied to the OFDM scheme.
- the AMCS method is an error correction method, an error correction coding rate, a data modulation multi-value number (MCS: Modulation and Coding) according to the channel conditions of each mobile station.
- MCS Modulation and Coding
- Scheme a method of switching wireless transmission parameters such as time-frequency axis code spreading factor (SF) and multi-code multiplexing number.
- FIG. 1 is a diagram showing a channel configuration in EUTRA.
- the downlink of EUTRA includes downlink pilot channel (DPiCH: Downlink Pilot Channel), downlink synchronization channel (PSCH: Physical Downlink Synchronization Channel), downlink shared channel (PDSCH: Physical Downlink Shared Channel), and downlink control. It consists of a channel (PDCCH: Physical Downlink Control Channel) and a downlink broadcast channel (PBCH: Physical Broadcast Channel).
- DCICH Downlink Pilot Channel
- PSCH Physical Downlink Synchronization Channel
- PDSCH Physical Downlink Shared Channel
- PBCH Physical Broadcast Channel
- EUTRA uplink includes uplink pilot channel (UPiCH: Uplink Pilot Channel), random access channel (RACH: Random Access Channel), uplink shared channel (PUSCH: Physical Uplink Shared Channel), and uplink control.
- UPiCH Uplink Pilot Channel
- RACH Random Access Channel
- PUSCH Physical Uplink Shared Channel
- uplink control uplink control.
- PUCCH Physical Uplink Control Channel
- MBMS Multimedia Broadcast Multicast Service
- MBMSMBdedicated cell a cell that specializes in MBMS transmission using a frequency different from the frequency used for unicast transmission (MBMS service dedicated frequency) and unicast transmission
- MBMS / Unicast-mixed cells two types of cells that perform both MBMS transmission and unicast transmission using the frequency used for communication (frequency not dedicated to MBMS service).
- a transmission method of the MBMS service there are a method in which only one base station transmits, and a method in which a plurality of base stations synchronized in time and frequency simultaneously transmit.
- the former is called SCPTM (Single-Cell-Point-to-Multipoint) transmission
- MBSFN Multimedia Broadcast multicast service Single Frequency Network
- SCPTM Single-Cell-Point-to-Multipoint
- MBSFN Multimedia Broadcast multicast service Single Frequency Network
- MBSFN transmission the same MBMS transmission signal is simultaneously transmitted from a plurality of base stations, and the mobile station can combine the signals so that they appear as one MBMS transmission signal.
- SCPTM Single-Cell-Point-to-Multipoint
- MBSFN Multimedia Broadcast multicast service Single Frequency Network
- FIG. 2 is a diagram illustrating a schematic configuration example of the MBMS service in the SCPTM transmission.
- the same AMCS as unicast transmission is applied to the MBMS transmission signal in the SCPTM transmission.
- FIG. 2 consider a state in which a plurality of mobile stations 20c, 20d, etc. are receiving an MBMS service in a cell 23 that provides an MBMS service by SCPTM transmission. It is assumed that the base station 10c provides the MBMS service by the SCPTM transmission and the two mobile stations 20c and 20d, and the mobile stations 20c and 20d receive the MBMS service.
- Non-Patent Document 1 Based on the current specification described in Non-Patent Document 1 below, a mobile station in an idle state that wishes to receive an MBMS service through SCPTM transmission transitions from an idle state to a connected state when specified by the base station 10c. It is assumed that uplink feedback resources are allocated and feedback is performed periodically. A mobile station in the connected state to which feedback resources for MBMS are allocated performs feedback to the base station using the feedback resource specified by the base station.
- This feedback information includes a channel quality identifier (CQI: Channel Quality Indicator, also called downlink channel quality information, CQI feedback information) indicating downlink channel quality for each frequency domain, and HARQ (Hybrid Automatic) for MBMS service data.
- CQI Channel Quality Indicator
- CQI feedback information Hybrid Automatic
- ACK Positive Acknowledgment
- NACK Negative Acknowledgment
- the mobile station 20 c with poor downlink channel quality performs feedback.
- an MCS value (a combination of the modulation multi-level number and coding rate in AMCS) so that all the mobile stations 20c and 20d can receive the MBMS service ( For example, 16QAM modulation, 2/3 coding rate) is determined and applied to the transmission data of the MBMS service, and then SCPTM transmission is performed.
- the mobile station 20c performing feedback is in a connected state
- the mobile station 20d not performing feedback is in an idle state or a connected state.
- 3GPP TS (Technical Specification) 36.300 V8.2.0 (2007-09), Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage2 (Release 8).
- 3GPP TS (Technical Specification) 36.304 V8.0.0 (2007-12), Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) procedure in idle mode (Release 8).
- FIG. 3 shows a cell reselection (Cell) in this cell 23 in addition to the base station 10c providing the MBMS service by the SCPTM transmission shown in FIG. 2 and the mobile stations 20c and 20d receiving the MBMS service.
- Cell cell reselection
- a mobile station 20e that has been (reselected) is shown. At this time, the mobile station 20e is in an idle state.
- the base station 10c allocates feedback resources to the mobile station 20c having a poor downlink channel quality. That is, the mobile station 20c is in a connected state.
- the downlink channel state (or quality) of the mobile station 20d is better than the downlink channel state (or quality) of the mobile station 20c.
- the base station 10c transmits the MBMS service with an MCS value that matches the bad downlink channel quality, but the mobile station 20d with good downlink channel quality that has not performed feedback can receive the MBMS service. Therefore, in this case, there is no problem even if the base station 10c determines the MCS value without considering the mobile station 20d that is not performing feedback.
- the mobile station 20e in the downlink channel state (or quality) that is worse than the downlink channel state (or quality) of the mobile station 20c that is performing feedback and in the idle state causes the cell 23 to
- the uplink feedback resource is not allocated, so the MBMS service is not provided with the optimum MCS value for the mobile station 20e.
- the base station 10c since the base station 10c is not aware of the presence of the mobile station 20e, the MCS value is determined without considering the mobile station 20e.
- the mobile station 20d when the mobile station 20d receives an MBMS service in an idle state, the downlink channel state (or quality) of the mobile station 20d deteriorates, and the downlink channel state (or quality) of the mobile station 20c deteriorates.
- the uplink feedback resource is not allocated, there is a problem that the MBMS service cannot be provided with the optimum MCS value for the mobile station 20d.
- the base station 10c since the base station 10c is not aware of the change in the downlink channel state (or quality) of the mobile station 20d, the MCS value is determined without considering the mobile station 20d.
- the base station 10c allocates an individual uplink feedback resource to each mobile station using the conventional technique, the uplink feedback resource is increased. Further, there is a problem that the base station 10c cannot efficiently select a mobile station according to the downlink channel state (or quality) of the mobile station.
- FIG. 11 describes a cell 23 in which the base station 10b provides an MBMS service through SCPTM transmission, and mobile stations 20c and 20f.
- the mobile station 20c represents the connected mobile station that has received the MBMS service and transmitted uplink feedback information to the base station 10b, and the mobile station 20f has received the MBMS service.
- the mobile station 20f when the mobile station 20f receives the MBMS service in the connected state, the downlink channel state (or quality) of the mobile station 20f deteriorates, and the downlink channel state (or quality) of the mobile station 20c However, since the uplink feedback resource is not allocated, the MBMS service is not provided with the optimum MCS value for the mobile station 20f. On the other hand, since the base station 10b does not know the change of the downlink channel state (or quality) of the mobile station 20f, the MCS value is determined without considering the mobile station 20f.
- the base station 10b assigns an individual uplink feedback resource to each mobile station using a general technique, there arises a problem that the uplink feedback resource increases. Further, there is a problem that the base station 10b cannot efficiently select a mobile station according to the downlink channel state (or quality) of the mobile station.
- An object of the present invention is to solve the above-described problems, and is a communication technique for efficiently providing an MBMS service by SCPTM transmission to a mobile station, in particular, a mobile station apparatus, a base station apparatus, a mobile station A communication system and a communication method are provided.
- a mobile station apparatus that communicates with a base station apparatus that provides an MBMS service, and transmits an MBMS request to the base station apparatus when a condition for performing an MBMS request is met.
- a mobile station apparatus is provided.
- the MBMS request is preferably an MBMS service feedback resource request.
- the MBMS request is preferably performed when the downlink control channel (PDCCH) used when transmitting the MBMS service cannot be received / demodulated / decoded for a certain period.
- the MBMS request is made when the downlink control channel (PDCCH) can be received / demodulated / decoded, but the downlink shared channel (PDSCH) cannot be received / demodulated / decoded for a certain period.
- the condition for performing the MBMS request may be a case where the downlink channel state (or quality) of the own station is equal to or less than (or less than) a threshold value broadcast from the base station apparatus.
- the MBMS request can be received, demodulated and decoded in the downlink control channel (PDCCH), but demodulated and decoded in the downlink shared channel (PDSCH) specified in the downlink control channel (PDCCH).
- the transmission form (MCS value, etc.) for doing so may not match the downlink channel state (or quality) of the own station.
- a mobile station apparatus that communicates with a base station apparatus that provides an MBMS service, and the MBMS measurement report is transmitted to the base station when a condition for performing an MBMS measurement report is met.
- a mobile station apparatus characterized by transmitting to the apparatus may be used.
- the MBMS measurement report is preferably an MBMS service feedback resource request report.
- the condition for performing the MBMS measurement report may be a case where the downlink control channel (PDCCH) used when transmitting the MBMS service cannot be received / demodulated / decoded for a certain period.
- PDCCH downlink control channel
- the conditions for performing the MBMS measurement report were that the downlink control channel (PDCCH) could be received, demodulated, and decoded, but the downlink shared channel (PDSCH) could not be received, demodulated, and decoded for a certain period of time. It may be the case.
- the condition for performing the MBMS measurement report may be a case where the downlink channel state (or quality) of the own station is equal to or less than (or less than) a threshold value broadcast from the base station apparatus.
- the conditions for performing the MBMS measurement report were that the downlink control channel (PDCCH) could be received, demodulated and decoded, but the downlink shared channel (PDSCH) specified in the downlink control channel (PDCCH) was demodulated / demodulated.
- the transmission form for decoding MCS value or the like
- a base station apparatus that provides an MBMS service to a mobile station apparatus, the MBMS request trigger standard and / or the MBMS measurement report trigger standard is notified to the mobile station apparatus.
- a featured base station apparatus is provided.
- an MBMS service feedback request is received from the mobile station apparatus, it is preferable to allocate a feedback resource to the mobile station apparatus.
- an MBMS service transmission request is received from the mobile station apparatus, it is preferable to provide the MBMS service specified by the MBMS service transmission request.
- a communication system including a mobile station apparatus and a base station apparatus that provides an MBMS service, and the mobile station apparatus performs the MBMS when a condition for performing an MBMS request is met.
- the base station device transmits a request to the base station device, the base station device allocates feedback resources to the mobile station device based on the MBMS request received from the mobile station device, and the mobile station device Using the feedback resource specified by the base station apparatus, feedback information is transmitted to the base station apparatus, and the base station apparatus performs the MBMS service based on the feedback information received from the mobile station apparatus.
- a communication system characterized by changing a transmission form is provided.
- the communication system includes a mobile station apparatus and a base station apparatus that provides an MBMS service, and the mobile station apparatus transmits the MBMS measurement report to the base station apparatus when a condition for performing an MBMS measurement report is met.
- the base station apparatus changes the transmission mode of the MBMS service based on the MBMS measurement report received from the mobile station apparatus.
- the MBMS service can be efficiently provided to the mobile station by SCPTM transmission.
- PUSCH uplink shared channel
- PUCCH uplink control channel
- RACH random access channel
- the vertical axis is frequency and the horizontal axis is time.
- FIG. It is a figure which shows the example of 1 structure of the communication system using the communication technique by this Embodiment. Knowing that the mobile station is providing the MBMS service by SCPTM transmission at the base station, requesting the feedback resource from the base station, and using the feedback resource designated by the base station 10b, FIG. It is a figure which shows the flowchart of a state transition until it will be in a connection state from an idle state through the procedure of FIG. It is a figure for demonstrating the structure of one radio frame (10 milliseconds) in a downlink, and the example of a radio channel mapping.
- FIG. 2 is a diagram illustrating a mobile station in a connected state that does not transmit uplink feedback information.
- a communication technique according to a second embodiment of the present invention wherein a base station receives an MBMS service in a cell providing an MBMS service by SCPTM transmission, but is in a connected state with respect to the base station 10b. It is a sequence diagram showing a procedure until the stations 20c and 20f transmit an MBMS measurement report to the base station 10b. It is a flowchart figure which shows the process sequence until the mobile station in a connection state makes a MBMS measurement report through the procedure of FIG.
- base station apparatus 101 data control section 102 OFDM modulation section 103 radio section 104 scheduling section 105 channel estimation section 106 DFT-S-OFDM demodulation section 107 data extraction section 109 upper layer 109a radio resource control section 200 mobile station apparatus 201 data control section 202 DFT-S-OFDM modulation section 203 Radio section 204 Scheduling section 205 Channel estimation section 206 OFDM demodulation section 207 Data extraction section 208 MBMS request section 209 Upper layer 209a Radio resource control section
- the communication technique according to the present embodiment includes a base station apparatus (hereinafter referred to as “base station”) 100 and a mobile station apparatus (hereinafter referred to as “mobile station”) 200.
- base station a base station apparatus
- mobile station a mobile station apparatus
- FIG. 4 is a functional block diagram showing a configuration example of a base station apparatus used in the communication technique according to the present embodiment.
- the configuration example of the base station apparatus shown in FIG. 4 can be applied not only to the first embodiment but also to a second embodiment to be described later.
- the base station apparatus 100 includes a data control unit 101, an OFDM modulation unit 102, a radio unit 103, a scheduling unit 104, a channel estimation unit 105, a DFT-Spread-OFDM demodulation unit (DFT). -S-OFDM demodulation unit) 106, data extraction unit 107, and upper layer 109.
- DFT DFT-Spread-OFDM demodulation unit
- the data control unit 101 receives control data, user data, and an MBMS service (also referred to as MBMS transmission data) from the scheduling unit 104, and transmits control data based on the scheduling information input from the scheduling unit 104. It maps to a link pilot channel (DPiCH), a downlink synchronization channel (PSCH), a downlink shared channel (PDSCH), a downlink control channel (PDCCH), and a downlink broadcast channel (PBCH). Also, user data for each mobile station is mapped to a downlink shared channel (PDSCH). Each mapped data is output to OFDM modulation section 102.
- DPiCH link pilot channel
- PSCH downlink synchronization channel
- PDSCH downlink shared channel
- PDCCH downlink control channel
- PBCH downlink broadcast channel
- PDSCH downlink shared channel
- Each mapped data is output to OFDM modulation section 102.
- the RRC (Radio Resource Control) message and the MAC (Medium Access Control) control Element are mapped to the downlink shared channel (PDSCH) and transmitted to the mobile station.
- PDSCH downlink shared channel
- the MBMS transmission data is mapped to the downlink shared channel (PDSCH), and the group identifier MBMS-RNTI (MBMS-Radio Network Temporary Identity) is assigned to the downlink control channel (PDCCH).
- PDSCH downlink shared channel
- MBMS-RNTI MBMS-Radio Network Temporary Identity
- MBMS related information is included in the logical channel BCCH (Broadcast Control Channel) or MCCH (Multicast Control Channel) and is mapped to the downlink shared channel (PDSCH).
- BCCH Broadcast Control Channel
- MCCH Multicast Control Channel
- RS Reference Signal
- DPiCH downlink pilot channel
- the OFDM modulation unit 102 receives scheduling information (downlink resource block PRB (Physical Resource Block) allocation information (for example, frequency, time) from the scheduling unit 104). Resource block location information) and MCS values corresponding to each PRB (including 16QAM modulation, 2/3 coding rate, etc.), encoding, data modulation, serial / parallel conversion of input signal, IFFT
- An OFDM signal is generated by performing (Inverse Fast Fourier Transform), CP (Cyclic Prefix) insertion, filtering, and the like, and an OFDM signal is generated and output to the radio section 103.
- the radio unit 103 up-converts the modulation data input from the OFDM modulation unit 102 to a radio frequency to generate a radio signal, and transmits the radio signal to the mobile station 200 via an antenna (not shown).
- Radio section 103 receives an uplink radio signal from mobile station 200 via an antenna (not shown), down-converts it to a baseband signal, and converts the received data to channel estimation section 105 and DFT- The data is output to the S-OFDM demodulator 106.
- the scheduling unit 104 performs downlink scheduling and uplink scheduling.
- uplink feedback information received from mobile station apparatus 200 downlink channel quality information (CQI feedback information), ACK / NACK feedback information for downlink user data or MBMS transmission data, etc.
- CQI feedback information downlink channel quality information
- ACK / NACK feedback information for downlink user data or MBMS transmission data etc.
- the buffer status Based on the PRB information that can be used by each mobile station apparatus, the buffer status, the scheduling information input from the upper layer 109, the downlink control data, user data, and MBMS transmission data input from the upper layer 109
- a scheduling process for mapping to a channel and a calculation process of a downlink transmission form (MCS value, etc.) for modulating each data are performed.
- the scheduling information is output to the data control unit 101.
- the uplink transmission form (MCS value etc.) is calculated.
- the uplink scheduling information is output to the data control unit 101.
- the scheduling unit 104 outputs downlink control data, user data, and MBMS transmission data input from the upper layer 109 to the data control unit 101. Also, the scheduling unit 104 outputs user data to the upper layer 109 among the uplink control data and user data input from the data extraction unit 107, and after processing the control data as necessary, Output to upper layer 109.
- the scheduling unit 104 generates a MAC control Element and exchanges the MAC control Element with the mobile station device 200.
- the channel estimation unit 105 estimates the uplink channel state from the demodulation pilot (DRS: Demodulation Reference Signal) of the uplink pilot channel (UPiCH) and demodulates the estimation result for DFT-S. Output to OFDM demodulator 106. Further, in order to perform uplink scheduling, an uplink channel state is estimated from an uplink pilot channel (UPiCH) scheduling pilot (SRS: Sounding Reference Signal), and the estimation result is output to the scheduling section 104.
- the uplink communication scheme is assumed to be a single carrier scheme such as DFT-S-OFDM, but a multicarrier scheme such as the OFDM scheme may be used.
- the DFT-S-OFDM demodulation unit 106 performs DFT conversion, subcarrier mapping, IFFT conversion on the modulation data input from the radio unit 103 based on the uplink channel state estimation result input from the channel estimation unit 105. Then, DFT-S-OFDM signal processing such as filtering is performed, demodulation processing is performed, and the result is output to the data extraction unit 107.
- the data extraction unit 107 confirms the correctness of the data input from the DFT-S-OFDM demodulation unit 106 and outputs a confirmation result (ACK / NACK) to the scheduling unit 104.
- the data extraction unit 107 separates the data input from the DFT-S-OFDM demodulation unit 106 into user data and control data, and outputs the user data and control data to the scheduling unit 104.
- the separated control data includes uplink feedback information (downlink channel quality information, downlink user data, or ACK / NACK feedback information for MBMS transmission data) notified from the mobile station 200.
- the upper layer 109 processes user data and control data.
- the upper layer 109 has a radio resource control unit 109a.
- the radio resource control unit 109a generates RRC messages and exchanges RRC messages with the radio resource control unit 209a of the mobile station apparatus 200. Further, the radio resource control unit 109a also manages the state of the mobile station device 200. Further, when receiving an MBMS request from a mobile station, the upper layer 109 generates feedback resource allocation information for the mobile station 200 based on downlink channel quality information included in the MBMS request. Also, the radio resource control unit 109a generates measurement setting information and notifies the mobile station apparatus.
- FIG. 10 is a diagram for explaining a configuration of one radio frame (10 milliseconds) in a downlink and a mapping example of a radio channel.
- the downlink radio frame is composed of a plurality of two-dimensional PRBs having a frequency bandwidth (Bch) and a time-base subframe (SF: Sub-frame).
- the PRB frequency bandwidth (Bch) is 180 kHz
- the subcarrier frequency bandwidth (Bsc) is 15 kHz
- one radio frame is 10 milliseconds
- the subframe (SF) is 1 millisecond.
- 10 PRBs in the time direction and 110 PRBs in the frequency direction are included.
- 12 PRBs are included in one PRB
- 1320 subcarriers are included in the entire system.
- Ts represents the OFDM symbol length.
- the downlink pilot channel (including DPiCH and RS) is mapped to the head of each subframe (SF). Further, one downlink broadcast channel (PBCH) and one downlink synchronization channel (PSCH) are mapped at the head of each radio frame and / or a plurality of radio frames. The remaining part of each PRB is used as a downlink shared channel (PDSCH), and is distributed to each mobile station using AMCS.
- PBCH downlink broadcast channel
- PSCH downlink synchronization channel
- FIG. 5 is a functional block diagram showing a configuration example of the mobile station apparatus according to the present embodiment.
- the mobile station apparatus configuration shown in FIG. 5 is similarly applied not only to the first embodiment but also to the second embodiment.
- mobile station apparatus 200 includes data control section 201, DFT-S-OFDM modulation section 202, radio section 203, scheduling section 204, channel estimation section 205, OFDM demodulation section 206, The data extraction unit 207 and the upper layer 209 are included.
- the data control unit 201 receives input of control data and user data from the scheduling unit 204, and based on the scheduling information input from the scheduling unit 204, the data control unit 201 and the uplink shared channel (PUSCH) Mapping to the control channel (PUCCH). Further, the demodulation pilot (DRS) and the scheduling pilot (SRS) are mapped to the uplink pilot channel (UPiCH). In addition, during preamble transmission in random access (contention based random access and non-contention random access), the preamble is mapped to a random access channel (RACH).
- RACH random access channel
- the feedback information (CQI feedback information and / or ACK / NACK feedback information) is mapped to the uplink shared channel (PUSCH).
- the feedback information (CQI feedback information and / or ACK / NACK feedback information) is mapped to the uplink control channel (PUCCH).
- Each data mapped in this way is output to the DFT-S-OFDM modulation unit 202.
- FIG. 6 shows a configuration example of one radio frame (10 milliseconds) in the uplink, and this uplink radio frame is divided into a plurality of radio resource blocks PRB.
- the vertical axis represents frequency and the horizontal axis represents time.
- One PRB radio resource is configured with an area of 180 kHz in the frequency direction and 1 millisecond in the time direction as a unit, and the uplink shared channel (PUSCH), uplink control channel (PUCCH), and random access channel (RACH) are mapped. Is done.
- uplink pilot channels including UPiCH, DRS, and SRS
- PUSCH uplink shared channel
- PUCCH uplink control channel
- RACH random access channel
- the DFT-S-OFDM modulation unit 202 performs data modulation, DFT (Discrete Fourier Transform) processing, subcarrier mapping, IFFT (Inverse Fast Fourier Transform) processing, CP insertion, filtering on the data input from the data control unit 201.
- DFT-S-OFDM signal processing such as the above is performed to generate a DFT-S-OFDM signal and output it to the radio section 203.
- the uplink communication scheme is assumed to be a single carrier scheme such as DFT-S-OFDM, but a multicarrier scheme such as the OFDM scheme may be used instead.
- Radio section 203 up-converts the modulation data input from DFT-S-OFDM modulation section 202 to a radio frequency, generates a radio signal, and transmits the radio signal to base station 100 via an antenna (not shown).
- Radio section 203 receives a radio signal modulated with downlink data from base station 100 via an antenna (not shown), down-converts it to a baseband signal, and converts the received data into channel It outputs to the estimation part 205 and the OFDM demodulation part 206.
- the scheduling unit 204 is configured to estimate the downlink channel state (radio channel state) input from the channel estimation unit 205, uplink scheduling information from the base station 100 input from the data extraction unit 207, and Based on scheduling information input from the upper layer 209, scheduling processing for mapping uplink user data and control data input from the upper layer 209 to each channel is performed. For uplink MCS, the MCS value notified from the base station 100 is used. The scheduling information is output to the data control unit 201. The scheduling unit 204 generates a MAC control Element and exchanges the MAC control Element with the base station apparatus 100.
- the scheduling unit 204 outputs the uplink control data and user data input from the higher layer 209 to the data control unit 201.
- the MBMS request input from the MBMS request unit 208 is output to the data extraction unit 201.
- the scheduling unit 204 also outputs downlink channel quality information (CQI feedback information) input from the channel estimation unit 205 and ACK / NACK feedback information input from the data extraction unit 207 to the data control unit 201. To do.
- the scheduling unit 204 outputs the user data to the upper layer 209 among the downlink control data and user data input from the data extraction unit 207, and after processing the control data as necessary, Output to the upper layer 209.
- the channel estimation unit 205 estimates the downlink channel state from the reference signal (RS) of the downlink pilot channel (DPiCH), and outputs the estimation result to the OFDM demodulation unit 206 in order to demodulate the downlink data. Further, the channel estimation unit 205 converts the estimation result into downlink channel quality information (CQI feedback information) and outputs the result to the scheduling unit 204 in order to notify the base station 100 of the downlink channel state estimation result. To do.
- RS reference signal
- DPiCH downlink pilot channel
- OFDM demodulation section 206 Based on the downlink channel state estimation result input from channel estimation section 205, OFDM demodulation section 206 performs OFDM demodulation processing on the modulated data input from radio section 203 and outputs the result to data extraction section 207. To do.
- the data extraction unit 207 confirms the correctness of the data input from the OFDM demodulation unit 206 and outputs a confirmation result (ACK / NACK feedback information) to the scheduling unit 204.
- the data extraction unit 207 separates the data input from the OFDM demodulation unit 206 into user data and control data, and outputs the user data and control data to the scheduling unit 204.
- the upper layer 209 processes user data and control data.
- the upper layer 209 has a radio resource control unit 209a.
- the radio resource control unit 209a generates an RRC message and exchanges the RRC message with the radio resource control unit 109a of the base station apparatus 100.
- the radio resource control unit 209a holds the RRC message from the base station apparatus 100 and sets parameters in the related function unit.
- the radio resource control unit 209a also performs state management of the own station.
- the radio resource control unit 209a has an MBMS request unit 208, and when the MBMS service is not transmitted based on the data input from the scheduling unit 204, the MBMS request including the MBMS service transmission request Is output to the scheduling unit 204.
- the MBMS request including the MBMS service transmission request is generated, and the scheduling unit 204 Output.
- the radio resource control unit 209a sets the measurement setting information received from the base station apparatus, performs measurement on the measurement item specified by the base station, and meets the conditions for performing the MBMS measurement report. To the base station.
- FIG. 7, FIG. 8, and FIG. 9 are diagrams for explaining the mechanism of the communication technology according to the present embodiment.
- FIG. 7 shows a mobile station 20b (procedure 1) receiving the MBMS service in a cell in which the base station 10b provides the MBMS service by SCPTM transmission, and the mobile station 20a After moving to this cell (cell reselection) using the cell reselection method (procedure 2)), procedures (procedure 3), 4), 5)) from receiving the MBMS service from the base station 10b
- the base station 10b may be a cell that supports both MBSFN transmission and SCPTM transmission.
- FIG. 8 shows that the mobile station 20a provides an MBMS service by SCPTM transmission in the base station 10b, requests the feedback resource from the base station 10b, and uses the feedback resource specified by the base station 10b.
- FIG. 6 is a sequence diagram showing a procedure until uplink feedback information is transmitted.
- FIG. 9 is a diagram showing a flow chart of state transition until the mobile station 20a changes from the idle state to the connected state through the procedure of FIG.
- the mobile station 20b represents a mobile station that is transmitting uplink feedback information among mobile stations that are receiving MBMS service by SCPTM transmission in the base station 10b. ing. That is, the mobile station 20b is in a connected state. Further, the base station 10a and the base station 10b are base stations that are a source and a destination when the mobile station 20a reselects a cell, respectively.
- the idle mobile station 20a receives, demodulates and decodes the downlink synchronization channel (PSCH) and downlink broadcast channel (PBCH) for the base station 10b. Further, the mobile station 20a knows that the base station 10b is providing the MBMS service by SCPTM transmission. This knowledge is acquired from the MBMS related information broadcast from the base station 10b (Procedure 1 in FIG. 8, FIG. 7—Procedure 3).
- the MBMS related information is included in BCCH (Broadcast Control Channel) or MCCH (Multicast Control Channel) which is a logical channel, and is mapped to the downlink shared channel (PDSCH).
- the MBMS related information includes an MBMS request trigger criterion (described later) in addition to the advertisement information indicating that the base station 10b provides the MBMS service by SCPTM transmission.
- this knowledge may be acquired through advertisement information broadcast by an adjacent base station (in this case, the base station 10a) before the mobile station 20a moves to this cell.
- the mobile station 20a confirms whether or not the MBMS service is actually being transmitted in this cell, and determines whether or not to make an MBMS request (FIG. 8—Procedure 2). This determination is made by the MBMS request unit 208. This MBMS request signaling is transmitted using contention based random access.
- MBMS requests There are two types of MBMS requests. One is an “MBMS service transmission request” that is transmitted when an MBMS service to be received is not transmitted. The other is an “MBMS service feedback request” that is transmitted when the transmission mode (MCS value or the like) of the MBMS service being transmitted is changed or when an uplink feedback resource is requested.
- MCS value transmission mode
- uplink feedback resource is requested.
- the mobile station 20a sends a message 1 (Msg.) Described later to the base station 10b in order to send an MBMS request (MBMS service transmission request message) when the MBMS service to be received is not transmitted. 1) is transmitted (FIG. 8—Procedure 3).
- the MBMS service to be received is transmitted, if the following conditions (MBMS request transmission conditions) are met, the base station 10b is transmitted in order to transmit an MBMS request (MBMS service feedback request message). Then, a message 1 described later is transmitted (FIG. 8—Procedure 3).
- the downlink control channel (PDCCH) can be received, demodulated, and decoded, but the downlink shared channel (PDSCH) cannot be received, demodulated, and decoded for a certain period. That is, when the cyclic redundancy check CRC (Cyclic Redundancy Check) added to the downlink shared channel (PDSCH) has not succeeded for a certain period of time.
- CRC Cyclic Redundancy Check
- the mobile station 20a measures the downlink synchronization channel (PSCH) and the downlink pilot channel (DPiCH) for the base station 10b through cell selection / reselection (procedure 2 in FIG. 7). That is, a) Correlation value of a synchronization code included in a downlink synchronization channel (PSCH) corresponding to the base station 10b, or correlation value of a reference signal (RS) code included in a downlink pilot channel (DPiCH) corresponding to the base station 10b (For example, dB value, mV value).
- PSCH downlink synchronization channel
- DPiCH downlink pilot channel
- the mobile station 20a uses one or more of these measurement results to compare with the threshold value broadcast from the base station 10b, and determines the downlink channel state (or quality). When the mobile station 20a is below (or below) a predetermined threshold value, the mobile station 20a transmits a message 1 described later to the base station 10b in order to transmit an MBMS request (MBMS service feedback request message).
- MBMS service feedback request message MBMS service feedback request message
- Condition 1 is thresholds related to the MBMS reception status
- Condition 3 is a threshold related to the channel state.
- the mobile station that has detected that any of the above conditions 1) to 4) is met immediately transmits an MBMS request (MBMS service feedback request) through a contention-type random access procedure.
- a mobile station that has detected that transmission of an MBMS service to be received has not been performed immediately transmits an MBMS request (MBMS service transmission request message) through a contention type random access procedure.
- the base station 10b notifies information (MBMS request trigger criteria: MBMS Trigger Criteria) for controlling the occurrence frequency of the MBMS request as described below, so that the mobile station controls the occurrence frequency of the MBMS request. Is possible.
- MBMS request trigger criteria MBMS Trigger Criteria
- Criterion 1 Prohibition of MBMS request Criterion 2) Presence / absence of MBMS service transmission Criterion 3) Threshold value of downlink control channel (PDCCH) reception failure determination period used for MBMS service transmission Criterion 4) Used for MBMS service transmission Threshold value for determination period for reception failure of downlink shared channel (PDSCH) to be performed Criterion 5) Threshold value for downlink channel state for MBMS service feedback request Criterion 6) Downlink shared channel (PDSCH) used for MBMS service transmission When using the threshold 1 of the non-conformity determination period of the transmission form (MCS value or the like), the mobile station that has not received the “MBMS request prohibition” from the base station receives an MBMS request (MBMS service transmission request, or (MBMS service feedback request) can be transmitted.
- MCS value the threshold 1 of the non-conformity determination period of the transmission form
- an MBMS request (MBMS service feedback request) and / or an MBMS request (MBMS Service transmission request) is not transmitted.
- the presence / absence of transmission of the MBMS service in the above standard 2) indicates whether the provision of the MBMS service has been advertised but actual data transmission has started.
- the mobile station receives an “MBMS service transmission presence / absence” from the base station, and only when it detects that the MBMS service is not transmitted, the MBMS request (MBMS service) Send request).
- the mobile station determines whether an MBMS request (MBMS service feedback request) should be transmitted according to a period during which the downlink control channel (PDCCH) cannot be received, demodulated, or decoded. That is, only the mobile station exceeding the threshold (or above) transmits an MBMS request (MBMS service feedback request).
- this threshold value may be a value common to all cells that perform the MBMS service using SCPTM transmission.
- the above criterion 4 when the above criterion 4) is used, it is used for MBMS service transmission by receiving from the base station the “threshold of the downlink shared channel (PDSCH) reception determination impossible period used for MBMS service transmission”.
- the mobile station determines whether to transmit an MBMS request (MBMS service feedback request) according to a period during which the downlink shared channel (PDSCH) cannot be received / demodulated / decoded. That is, only the mobile station exceeding the threshold (or above) transmits an MBMS request (MBMS service feedback request).
- This threshold value may also be a value common to all cells that perform the MBMS service using SCPTM transmission.
- the downlink channel state of the local station is set to the threshold (the above condition 3) by receiving the “threshold for downlink channel state for MBMS service feedback request” from the base station. It is determined that only the mobile station that is equal to or less than (or less than the described threshold) transmits an MBMS request (MBMS service feedback request).
- This threshold value may also be a value common to all cells that perform the MBMS service using SCPTM transmission.
- the transmission of the MBMS service is performed by receiving the “threshold of the nonconformity determination period of the transmission form of the downlink shared channel (PDSCH) used for transmitting the MBMS service” from the base station.
- the mobile station determines whether an MBMS request (MBMS service feedback request) should be transmitted according to a period in which the transmission form (MCS value or the like) of the downlink shared channel (PDSCH) used for the mobile station is inappropriate. That is, only the mobile station exceeding the threshold (or above) transmits an MBMS request (MBMS service feedback request).
- This threshold value may also be a value common to all cells that perform the MBMS service using SCPTM transmission.
- MBMS request trigger criteria are not limited to this. Further, the operation may be performed not only when a single criterion is met but also when a plurality of criteria are met.
- contention based random access Contention based Random Access
- Non-contention based Random Access Random Access
- the former is random access that may collide between mobile stations
- the latter is random access that does not cause collision between mobile stations.
- the former procedure will be described here.
- Contention-based random access starts when the mobile station 20a transmits a preamble (message 1).
- the preamble includes a preamble ID that is a signal pattern representing information.
- 6 bits ie, 64 types
- 6-bit information is assigned information such as 5 bits for random ID and the remaining 1 bit for downlink path loss / CQI.
- the mobile station 20a selects the preamble ID based on the random ID, the downlink path loss / CQI, and the like, and transmits the preamble through the random access channel (RACH) (FIG. 8-Procedure 3).
- the message 1 also has a meaning of requesting an uplink resource for transmitting the message 3 (described later).
- the base station 10b When the base station 10b receives the preamble from the mobile station 20a, the RA-RNTI (Random Access) indicating a response addressed to the mobile station 20a that has transmitted the preamble using the random access channel (RACH) to the downlink control channel (PDCCH).
- -Radio Network Temporary Identity indicating a response addressed to the mobile station 20a that has transmitted the preamble using the random access channel (RACH) to the downlink control channel (PDCCH).
- -Radio Network Temporary Identity Downlink shared channel (PDSCH), synchronization timing shift information, scheduling information of message 3 (described later), Temporary C-RNTI (Temporary Cell-Radio Network Temporary Identity), and
- a random access response (message 2) including the preamble ID of the received preamble is transmitted (FIG. 8-Procedure 4).
- the mobile station 20a Upon confirming that the downlink control channel (PDCCH) has RA-RNTI, the mobile station 20a confirms the content of the random access response arranged in the downlink shared channel (PDSCH), and transmits the preamble transmitted by the mobile station 20a. It is detected whether or not the preamble ID is included.
- the downlink control channel (PDCCH) has RA-RNTI
- the mobile station 20a continues to wait for a random access response from the base station 10b for a certain period, and when it does not receive the random access response including the transmitted preamble ID, leaves the procedure and transmits the preamble again (see FIG. 8-Procedure 3).
- the mobile station 20a When detecting the preamble ID transmitted by the mobile station 20a, the mobile station 20a transmits the message 3 in the scheduled radio resource (FIG. 8—Procedure 5).
- the message 3 includes an RRC connection request (Radio Resource Control Control Connection Request), an MBMS request, and channel quality information (CQI feedback information).
- the RRC connection request is information used when a mobile station in an idle state transitions to a connected state.
- the mobile station has a NAS-ID (Non-Access-Stratum-Identity) (for example, IMSI (International Mobile Subscriber Identity) or TMSI). (Temporary Mobile Subscriber Identity)) and the selected PLMN ID (Public Land Mobile Network Identity) are included and transmitted as an RRC message.
- NAS-ID Non-Access-Stratum-Identity
- IMSI International Mobile Subscriber Identity
- TMSI Temporal Mobile Subscriber Identity
- PLMN ID Public Land Mobile Network Identity
- An MBMS request is transmitted together with this RRC connection request. That is, the MBMS request is transmitted as L3 (Layer 3) level control information called an RRC message, and includes an MBMS service feedback request message or an MBMS service transmission request message. Each message includes an MBMS service ID for identifying which MBMS service the request is for.
- the MBMS request may be transmitted by being included in the RRC connection request, but may be transmitted as a separate message. When sent as a separate message, it is included in the RRC signal from the mobile station after RRC connection setup.
- the channel quality information is further included in the MBMS request.
- the channel quality information may be transmitted as L2 (Layer 2) level control information called MAC control Element, or may be included in the RRC message.
- L2 Layer 2
- MAC control Element L2 level control information
- information indicating the detailed MBMS service reception status different from the channel quality information may be transmitted. This facilitates determination of feedback resource allocation at the base station.
- the base station 10b When receiving the RRC connection request (message 3) from the mobile station 20a, the base station 10b transmits a message 4 including an RRC connection setup (Radio Resource Control Control Connection) to the mobile station 20a (FIG. 8-Procedure 7).
- This RRC connection setup also includes a contention resolution message for the mobile station 20a to determine whether it is an RRC connection setup addressed to itself by including the NAS ID detected by the base station 10b in message 3. ing.
- the mobile station 20a receives the RRC connection setup including the NAS ID of its own station, the RRC connection between the mobile station 20a and the base station 10b is established, and this contention based random access procedure ends.
- the base station 10b When the MBMS request included in the message 3 is an MBMS service transmission request, the base station 10b starts transmission of the MBMS service and, based on the channel quality information (CQI feedback information) acquired in the message 3, It is determined whether or not an uplink feedback resource is assigned to 20a (FIG. 8-Procedure 6). Also, if the MBMS request is an MBMS service feedback request, the base station 10b determines whether to allocate uplink feedback resources to the mobile station 20a based on the channel quality information (CQI feedback information) acquired in the message 3 (FIG. 8-Procedure 6).
- CQI feedback information channel quality information
- uplink feedback resources are provided to the mobile station that has received an MBMS request (MBMS service transmission request or MBMS service feedback request) from a plurality of mobile stations and has transmitted the worst channel quality information (CQI feedback information). Assign. That is, depending on the situation (when it is not the mobile station that transmitted the worst channel quality information), the base station 10b may not allocate uplink feedback resources in this RRC connection setup, or may use RRC instead of RRC connection setup. A connection reject (a message rejecting the RRC connection request received in message 3) may be transmitted. With this scheduling method, it is possible to reduce the overhead of uplink feedback resources.
- MBMS request MBMS service transmission request or MBMS service feedback request
- CQI feedback information worst channel quality information
- the feedback resource allocation information is transmitted as the message 4 together with the RRC connection setup.
- the feedback resource allocation information is composed of uplink control channel (PUCCH) or uplink shared channel (PUSCH) resource allocation, transmission period, feedback information (channel quality information and / or ACK / NACK feedback information) format, and the like.
- the feedback resource allocation information may be included in the RRC connection setup or may be sent as a separate message. When sent as a separate message, it is included in the RRC signal from the base station after RRC connection setup.
- the base station 10b allocates feedback resources to the mobile station 20a.
- the mobile station 20a that has received the RRC connection setup including the NAS ID of the local station thereafter (FIG. 8—procedure 8 and later), the resource specified in the feedback resource allocation information (uplink control channel (PUCCH))
- uplink control channel (PUCCH) uplink control channel
- channel quality information (CQI feedback information) and / or ACK / NACK is transmitted using an uplink shared channel (PUSCH).
- the base station has worse channel quality information (CQI feedback information) when the number of mobile stations transmitting uplink feedback information reaches a certain number.
- CQI feedback information channel quality information
- the base station When a mobile station that returns is appeared, scheduling is performed so that uplink feedback resources are allocated to the mobile station and uplink feedback resources of other mobile stations are released.
- the base station returns a mobile station that returns worse channel quality information (CQI feedback information). Even if uplink feedback resources are allocated to a station, it is not always necessary to release uplink feedback resources of other mobile stations (however, they may be released).
- the base station may perform scheduling so as to release the allocation of uplink feedback resources to the mobile station.
- CQI feedback information channel quality information
- FIG. 9 will be described with reference to FIG.
- the mobile station periodically performs cell reselection processing in the idle state (RRC_IDLE) (FIG. 9—step S1).
- the MBMS related information includes advertisement information indicating that the base station 10b is providing the MBMS service through the SCPTM transmission, the above-described MBMS request trigger criteria, and the like (FIG. 9—Step S2). Since the mobile station 20a that receives MBMS can receive the MBMS service while in the idle state, the mobile station 20a also receives notification information for the connection state. As a result, both the mobile stations in the idle state and the connected state can receive MBMS related information and measurement configuration (Measurement Configuration) information (described later).
- Measurement Configuration Measurement Configuration
- the mobile station 20a When the mobile station 20a matches the conditions for making an MBMS request (MBMS request transmission conditions based on the trigger criteria) in the MBMS service that it wants to receive (FIG. 9—YES in step S3), the mobile station 20a enter. On the other hand, if the condition is not met (NO in FIG. 9-step S3), the process returns to FIG. 9-step S1.
- Step S4 is processing corresponding to FIG. 8—Procedure 3 to Procedure 5. That is, the mobile station 20a transmits a preamble to the base station 10b, receives a random access response including scheduling information for message 3 transmission from the base station 10b, and sends an RRC connection request ( The message 3 including the NAS ID of the own station), the MBMS request, and the channel quality information (CQI feedback information) is transmitted.
- RRC connection request The message 3 including the NAS ID of the own station
- the MBMS request the channel quality information (CQI feedback information) is transmitted.
- CQI feedback information channel quality information
- step S5 when the message 4 including the RRC connection setup including the NAS ID addressed to the own station and the uplink feedback resource allocation information is received from the base station 10b (FIG. 9—YES in step S5), the mobile station 20a Transits to the connected state (RRC_CONNECTED) and transmits feedback information (CQI feedback information and / or ACK / NACK feedback information) to the base station using the designated uplink feedback resource (FIG. 9—step S6). . In other cases (FIG. 9-NO in step S5), the process returns to FIG. 9-step S1 without changing to the connected state and in the idle state. Also, when an RRC connection reject is received from the base station 10b (in the case of NO in FIG. 9-step S5), the process returns to FIG. 9-step S1 without changing to the connected state and in the idle state.
- the base station returns a worse channel state and MBMS reception status when the number of mobile stations transmitting uplink feedback information reaches a certain number.
- uplink feedback resources are allocated to the mobile station, and scheduling is performed so as to release uplink feedback resources of other mobile stations.
- the base station On the other hand, even if uplink feedback resources are allocated, it is not always necessary to release uplink feedback resources of other mobile stations (however, they may be released).
- the base station may perform scheduling so as to release allocation of uplink feedback resources to the mobile station.
- the mobile station transmits an MBMS request to the base station when it meets the conditions for making an MBMS request.
- the base station can efficiently provide an MBMS service by SCPTM transmission to the mobile station.
- FIG. 11 is a diagram for explaining a mechanism of communication technology according to the second embodiment of the present invention.
- FIG. 11 describes a cell 23 in which the base station 10b provides an MBMS service through SCPTM transmission, and mobile stations 20c and 20f.
- the mobile station 20c represents the connected mobile station that has received the MBMS service from the base station 10b and is transmitting uplink feedback information
- the mobile station 20f has received the MBMS service.
- FIG. 12 shows that the mobile stations 20c and 20f connected to the base station 10b receive the MBMS service in the cell 23 where the base station 10b provides the MBMS service by SCPTM transmission. It is a sequence diagram which shows the procedure until it transmits a MBMS measurement report with respect to 10b.
- the mobile stations 20c and 20f that have already received the MBMS service but are connected to the base station 10b are connected to the downlink synchronization channel (PSCH) and the downlink broadcast channel for the base station 10b. (PBCH) is received, demodulated, and decoded.
- PSCH downlink synchronization channel
- PBCH downlink broadcast channel for the base station 10b.
- the mobile stations 20c and 20f already know that the base station 10b provides the MBMS service by SCPTM transmission.
- the MBMS related information is included in the logical channel BCCH or MCCH and mapped to the downlink shared channel (PDSCH).
- the MBMS-related information includes, in addition to advertisement information indicating that the base station 10b is providing the MBMS service by SCPTM transmission, an MBMS measurement report trigger criterion described later.
- Measurement setting information includes measurement report (Measurement Report) criteria (Periodic Reporting, Event Triggered Reporting, Event Triggered Periodic Report (Event Triggered Periodic Reporting)), measurement, etc. Items (reference signal received power (RSRP: Reference Signal Received Power), carrier received signal strength (RSSI), or reference signal received quality (RSRQ: Reference Signal Received Quality), etc.), measurement item threshold, measurement ID (Measurement Identity) ), Measurement command (Measurement Command), and measurement report format.
- RSRP Reference Signal Received Power
- RSSI carrier received signal strength
- RSSQ Reference Signal Received Quality
- the measurement report standard is information that defines at what timing the result of measurement by the mobile station is transmitted to the base station.
- the measurement item represents which signal is to be measured among signals transmitted from the base station.
- the measurement ID is a signal from a base station of EUTRAN (EUTRA Network) having the same carrier frequency, a signal from a base station in EUTRA having a different carrier frequency, or other than EUTRAN This is used to specify whether the signal is from a base station (that is, UTRAN (Universal Terrestrial Radio Access Network) and GERAN).
- EUTRAN EUTRA Network
- UTRAN Universal Terrestrial Radio Access Network
- GERAN Universal Terrestrial Radio Access Network
- the measurement command is used when the base station notifies the mobile station of a measurement start / stop command and measurement setting information update. That is, the start and stop of measurement in the mobile station are specified by the base station.
- the measurement setting information is transmitted as an RRC message (mobile station specific information or cell specific information).
- the mobile station specific information is transmitted as an RRC signal, and the cell specific information is transmitted as a broadcast signal.
- the MBMS measurement report standard is added to the measurement report standard at the time of event occurrence (Event (Triggered Reporting) used for normal handover or the like.
- MBMS measurement reports There are two types of MBMS measurement reports.
- One of the MBMS measurement reports is an “MBMS service transmission request report” that is transmitted when the MBMS service to be received is not transmitted.
- Another of the MBMS measurement reports is “MBMS service feedback request” triggered when the transmission mode (MCS value, etc.) of the MBMS service being transmitted is changed or when an uplink feedback resource is requested. Report ".
- the mobile stations 20c and 20f determine whether or not to actually transmit an MBMS measurement report in this cell (FIG. 12—Procedure 13). This determination is performed by the radio resource control unit 209.
- the mobile stations 20c and 20f transmit an MBMS measurement report (MBMS service transmission request report message) when the MBMS service to be received is not transmitted (procedure 14 in FIG. 12).
- MBMS measurement report conditions MBMS service feedback request report message
- the MBMS measurement report condition the same MBMS request transmission condition as described in the first embodiment can be used. The conditions are shown below.
- the downlink control channel (PDCCH) can be received, demodulated, and decoded, but the downlink shared channel (PDSCH) cannot be received, demodulated, and decoded for a certain period. That is, when the cyclic redundancy check CRC (Cyclic Redundancy Check) added to the downlink shared channel (PDSCH) has not succeeded for a certain period of time.
- CRC Cyclic Redundancy Check
- Condition 1 is a threshold related to the MBMS reception status
- Condition 3 is a threshold related to the channel state.
- the mobile station that has detected that any of the above conditions 1) to 4) is met transmits an MBMS measurement report (MBMS service feedback request report message) on the uplink.
- the mobile station that has detected that the MBMS service that it wants to receive has not been transmitted immediately transmits an MBMS measurement report (MBMS service transmission request report message).
- the base station 10b notifies the following information (MBMS measurement report trigger criteria: MBMS Trigger Criteria) for controlling the occurrence frequency of the MBMS measurement report, so that the mobile station generates the MBMS request occurrence frequency. Can be controlled.
- MBMS measurement report trigger criteria MBMS Trigger Criteria
- Criteria 1 Prohibition of MBMS measurement report Criteria 2) Presence / absence of MBMS service transmission Criteria 3) Threshold value for determination of reception failure of downlink control channel (PDCCH) used for transmission of MBMS service Criteria 4) Transmission of MBMS service Threshold value for determination of reception failure of downlink shared channel (PDSCH) used Criteria 5) Threshold value for downlink channel state for MBMS service feedback request report Criteria 6) Downlink shared channel (PDSCH) used for transmission of MBMS service ) Transmission type (MCS value, etc.) of non-conformity determination period of the above-mentioned criteria 1), the mobile station that has not received “MBMS measurement report prohibition” from the base station receives an MBMS measurement report (MBMS service).
- PDCCH downlink control channel
- Transmission request report or MBMS service feedback request report The judges. On the other hand, even if the mobile station receiving “MBMS measurement report prohibition” satisfies any of the above conditions 1) to 4), the MBMS measurement report (MBMS service feedback request report) and / or MBMS The measurement report (MBMS service transmission request report) is not transmitted.
- the presence / absence of transmission of the MBMS service in the above standard 2) indicates whether the provision of the MBMS service has been advertised but actual data transmission has started.
- the mobile station receives an “MBMS service transmission presence / absence” from the base station, and only detects that the MBMS service is not transmitted. (MBMS service transmission request report) is transmitted.
- the MBMS service can be transmitted.
- the mobile station determines whether to transmit an MBMS measurement report (MBMS service feedback request report) according to a period during which the downlink control channel (PDCCH) to be used cannot be received / demodulated / decoded. That is, only the mobile station exceeding (or exceeding) the threshold value transmits the MBMS measurement report (MBMS service feedback request report).
- this threshold value may be a value common to all cells that perform the MBMS service using SCPTM transmission.
- the mobile station determines whether to transmit an MBMS measurement report (MBMS service feedback request report) according to a period during which the downlink shared channel (PDSCH) to be used cannot be received / demodulated / decoded. That is, only the mobile station exceeding (or exceeding) the threshold value transmits the MBMS measurement report (MBMS service feedback request report).
- This threshold value may also be a value common to all cells that perform the MBMS service using SCPTM transmission.
- the downlink channel state of the own station is set to the threshold value (the above condition 3) by receiving “the threshold value of the downlink channel state for MBMS service feedback request report” from the base station. Only the mobile station that is equal to or less than (or less than) the threshold value described in (1)) determines that an MBMS measurement report (MBMS service feedback request report) is transmitted.
- This threshold value may also be a value common to all cells that perform the MBMS service using SCPTM transmission.
- the MBMS service is received by receiving from the base station the “threshold for the nonconformity determination period of the transmission format of the downlink shared channel (PDSCH) used for transmitting the MBMS service”.
- Whether the mobile station should transmit an MBMS measurement report (MBMS service feedback request report) according to a period in which the transmission form (MCS value, etc.) of the downlink shared channel (PDSCH) used for transmission of the mobile station is inappropriate Determine whether. That is, only the mobile station exceeding (or exceeding) the threshold value transmits the MBMS measurement report (MBMS service feedback request report).
- This threshold value may also be a value common to all cells that perform the MBMS service using SCPTM transmission.
- the base station 10b can change the transmission mode of the MBMS service based on the MBMS measurement report from the mobile station 20f.
- the above criteria are not limited to this. Further, the operation may be performed not only when a single criterion is met but also when a plurality of criteria are met.
- a reverse threshold that is, an upper threshold can be provided for the mobile station 20c performing feedback. That is, the mobile station 20c having a channel state equal to or exceeding a certain upper threshold and the MBMS reception status transmits an MBMS measurement report so that the base station 10b can release feedback resources.
- FIG. 13 will be described with reference to FIG.
- the mobile station 20f will be described, but the mobile station 20c performs the same processing.
- the mobile station 20f in the connected state receives, demodulates and decodes the downlink synchronization channel (PSCH) and the downlink broadcast channel (PBCH) from the base station 10b, and is shared by the downlink.
- MBMS related information broadcast on the channel (PDSCH) or the like is acquired (FIG. 13—step S12).
- the MBMS related information includes advertisement information indicating that the base station 10b is providing an MBMS service through SCPTM transmission, the above-described MBMS measurement report trigger criteria, and the like.
- the base station 10b instructs the mobile station 20f to start measurement.
- the mobile station 20f that is designated to start measurement starts measurement in accordance with the MBMS measurement report standard from the base station 10b (FIG. 13—step S13).
- the mobile station 20f matches the conditions for performing an MBMS measurement report (MBMS measurement report conditions based on the trigger criteria) in the MBMS service to be received (FIG. 13—YES in step S13), the mobile station 20f performs the MBMS measurement report transmission process. Enter (FIG. 13—Step S14). On the other hand, if the condition is not met (NO in FIG. 13-step S13), the process returns to FIG. 13-step S11.
- This MBMS measurement report includes information indicating that the MBMS measurement report standard has been reached or the measurement value itself.
- This measurement report is transmitted as L3 (Layer 3) level control information called an RRC message, and includes an MBMS service feedback request report message or an MBMS service transmission report message.
- Each message includes an MBMS service ID for identifying which MBMS service the request is for.
- the base station returns a worse channel state and MBMS reception status when the number of mobile stations transmitting uplink feedback information reaches a certain number.
- uplink feedback resources are allocated to the mobile station, and scheduling is performed so as to release uplink feedback resources of other mobile stations.
- the base station On the other hand, even if uplink feedback resources are allocated, it is not always necessary to release uplink feedback resources of other mobile stations (however, they may be released).
- the base station may perform scheduling so as to release allocation of uplink feedback resources to the mobile station.
- the base station 10b can change the transmission mode of the MBMS service based on the MBMS measurement report from the mobile station 20f.
- the mobile station transmits the MBMS measurement report to the base station when it meets the conditions for performing the MBMS measurement report.
- the base station has an advantage that the mobile station can efficiently provide the MBMS service by the SCPTM transmission.
- the same MBMS request transmission condition described in the first embodiment and the MBMS measurement report condition described in the second embodiment are used, and the MBMS request trigger described in the first embodiment is further used. If the same standard is used for the criterion and the trigger criterion for the MBMS measurement report described in the second embodiment, the measurement complexity at the mobile station can be reduced. Also, the MBMS measurement report, the MBMS service request report, and the MBMS service feedback request report used in the second embodiment are respectively the same messages as the MBMS measurement request, the MBMS service request, and the MBMS service feedback request of the first embodiment. You may comprise so that it may be used. This can reduce the design complexity of the mobile station.
- a program for realizing the functions described in the present embodiment is recorded on a computer-readable recording medium, and the program recorded on the recording medium is read into a computer system and executed to execute processing of each unit. May be performed.
- the “computer system” here includes an OS and hardware such as peripheral devices.
- the “computer system” includes a homepage providing environment (or display environment) if a WWW system is used.
- the “computer-readable recording medium” means a storage device such as a flexible disk, a magneto-optical disk, a portable medium such as a ROM and a CD-ROM, and a hard disk incorporated in a computer system. Furthermore, the “computer-readable recording medium” dynamically holds a program for a short time like a communication line when transmitting a program via a network such as the Internet or a communication line such as a telephone line. In this case, a volatile memory in a computer system serving as a server or a client in that case, and a program that holds a program for a certain period of time are also included.
- the program may be a program for realizing a part of the functions described above, and may be a program capable of realizing the functions described above in combination with a program already recorded in a computer system. Also, a communication method may be used.
- the type of wireless access means is not limited to existing means such as W-CDMA, cdma2000, wireless LAN, and PHS, but the present invention can also be applied to communication means that will be put into practical use in the future.
- the present invention can be used in a mobile communication system that provides an MBMS service.
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Abstract
Description
3GPP TS (Technical Specification) 36.300 V8.2.0 (2007-09), Evolved Universal Terrestrial Radio Access (E-UTRA) and Evolved Universal Terrestrial Radio Access Network (E-UTRAN); Overall description; Stage2 (Release 8). 3GPP TS (Technical Specification) 36.304 V8.0.0 (2007-12), Evolved Universal Terrestrial Radio Access (E-UTRA); User Equipment (UE) procedure in idle mode (Release 8).
101 データ制御部
102 OFDM変調部
103 無線部
104 スケジューリング部
105 チャネル推定部
106 DFT-S-OFDM復調部
107 データ抽出部
109 上位層
109a 無線リソース制御部
200 移動局装置
201 データ制御部
202 DFT-S-OFDM変調部
203 無線部
204 スケジューリング部
205 チャネル推定部
206 OFDM復調部
207 データ抽出部
208 MBMS要求部
209 上位層
209a 無線リソース制御部
以下、本発明の第1の実施の形態による通信技術について図面を参照しながら説明する。
a)基地局10bに対応した下りリンク同期チャネル(PSCH)に含まれる同期符号の相関値や、基地局10bに対応した下りリンクパイロットチャネル(DPiCH)に含まれる参照信号(RS)符号の相関値(例えばdB値、mV値)。
d)下りリンクOFDM信号から検出した搬送波受信信号強度(RSSI:EUTRA carrier Received Signal Strength Indicator、例えばdBm値、mW値)
などである。
基準2)MBMSサービスの送信の有無
基準3)MBMSサービスの送信に使用される下りリンク制御チャネル(PDCCH)の受信不能判定期間の閾値
基準4)MBMSサービスの送信に使用される下りリンク共用チャネル(PDSCH)の受信不能判定期間の閾値
基準5)MBMSサービスフィードバック要求用の下りリンクチャネル状態の閾値
基準6)MBMSサービスの送信に使用される下りリンク共用チャネル(PDSCH)の送信形態(MCS値など)の不適合判定期間の閾値
上記基準1)を利用する場合、基地局から「MBMS要求の禁止」を受信していない移動局は、MBMS要求(MBMSサービス送信要求、または、MBMSサービスフィードバック要求)の送信が可能であることを判断する。一方、「MBMS要求の禁止」を受信している移動局は、上記条件1)から4)のいずれかを満たす場合であっても、MBMS要求(MBMSサービスフィードバック要求)および/またはMBMS要求(MBMSサービス送信要求)の送信はしない。
上記第1の実施の形態では、アイドル状態の移動局が、SCPTM送信でMBMSサービスを提供するセルへセル再選択をした場合を例にとって説明を行った。しかしながら、例えば、もともとそのセルにおいて、上りリンクのフィードバックリソースが割り当てられておらず、MBMSサービスを受信しているアイドル状態の移動局の下りリンクのチャネル状態(または品質)やMBMS受信状況が劣化した場合に対しても、図8や図9に記載のシーケンス図、フローチャートを適用することができる。
次に、本発明の第2の実施の形態による通信技術について図面を参照しながら説明を行う。図11は、本発明の第2の実施の形態による通信技術の仕組みを説明するための図である。図11には、基地局10bがSCPTM送信でMBMSサービスを提供するセル23と、移動局20cと20fが記述されている。ここでは、移動局20cは基地局10bからMBMSサービスを受信し、上りリンクのフィードバック情報を送信している接続状態の移動局を表しており、移動局20fはMBMSサービスを受信しているが、基地局10bに対して上りリンクのフィードバック情報を送信していない接続状態の移動局を表している。また、基地局10bの構成や、移動局20cと20fの構成は、第1の実施形態に記載の構成を利用する。また、図12は、基地局10bがSCPTM送信でMBMSサービスを提供するセル23において、MBMSサービスを受信しているが、基地局10bに対して接続状態にある移動局20cおよび20fが、基地局10bに対してMBMS測定報告を送信するまでの手順を示すシーケンス図である。
基準2)MBMSサービスの送信の有無
基準3)MBMSサービスの送信に使用される下りリンク制御チャネル(PDCCH)の受信不能判定期間の閾値
基準4)MBMSサービスの送信に使用される下りリンク共用チャネル(PDSCH)の受信不能判定期間の閾値
基準5)MBMSサービスフィードバック要求報告用の下りリンクチャネル状態の閾値
基準6)MBMSサービスの送信に使用される下りリンク共用チャネル(PDSCH)の送信形態(MCS値など)の不適合判定期間の閾値
上記基準1)を利用する場合に、基地局から「MBMS測定報告の禁止」を受信していない移動局は、MBMS測定報告(MBMSサービス送信要求報告、または、MBMSサービスフィードバック要求報告)の送信が可能であることを判断する。一方、「MBMS測定報告の禁止」を受信している移動局は、上記条件1)から4)のいずれかを満たす場合であっても、MBMS測定報告(MBMSサービスフィードバック要求報告)および/またはMBMS測定報告(MBMSサービス送信要求報告)の送信はしない。
尚、本発明は、上記に記載の実施の形態で示した例に限定されず、種々の変更を行うことが可能である。上記の各実施の形態において、添付図面に図示されている構成等については、これらに限定されるものではなく、本発明の効果を発揮する範囲内で適宜変更することが可能である。その他、本発明の目的の範囲を逸脱しない限りにおいて適宜変更して実施することが可能である。
Claims (18)
- MBMSサービスを提供する基地局装置と通信を行う移動局装置であって、
MBMS要求を行う条件に合致した場合に、前記MBMS要求を前記基地局装置に送信することを特徴とする移動局装置。 - 前記MBMS要求は、MBMSサービスフィードバックリソース要求であることを特徴とする請求項1に記載の移動局装置。
- 前記MBMS要求を行う条件は、MBMSサービスの送信時に使用される下りリンク制御チャネル(PDCCH)を一定期間受信・復調・復号をすることができない場合であることを特徴とする請求項1又は2に記載の移動局装置。
- 前記MBMS要求を行う条件は、下りリンク制御チャネル(PDCCH)を受信・復調・復号することはできたが、下りリンク共用チャネル(PDSCH)の受信・復調・復号が一定期間できなかった場合であることを特徴とする請求項1又は2に記載の移動局装置。
- 前記MBMS要求を行う条件は、自局の下りリンクのチャネル状態又は品質が、前記基地局装置から報知される閾値以下の場合であることを特徴とする請求項1又は2に記載の移動局装置。
- 前記MBMS要求を行う条件は、下りリンク制御チャネル(PDCCH)を受信・復調・復号することはできたが、下りリンク制御チャネル(PDCCH)において指定される下りリンク共用チャネル(PDSCH)を復調・復号するための送信形態が、自局の下りリンクのチャネル状態又は品質と合わない場合であることを特徴とする請求項1又は2に記載の移動局装置。
- 前記MBMS要求を送信するために、競合型ランダムアクセスを行うことを特徴とする請求項1から6までのいずれか1項に記載の移動局装置。
- MBMSサービスを提供する基地局装置と通信する移動局装置であって、
MBMS測定報告を行う条件に合致した場合に、前記MBMS測定報告を前記基地局装置に送信することを特徴とする移動局装置。 - 前記MBMS測定報告は、MBMSサービスフィードバックリソース要求報告であることを特徴とする請求項8に記載の移動局装置。
- 前記MBMS測定報告を行う条件は、MBMSサービスの送信時に使用される下りリンク制御チャネル(PDCCH)を一定期間受信・復調・復号することができない場合であることを特徴とする請求項8に記載の移動局装置。
- 前記MBMS測定報告を行う条件は、下りリンク制御チャネル(PDCCH)を受信・復調・復号することはできたが、下りリンク共用チャネル(PDSCH)の受信・復調・復号が一定期間できなかった場合であることを特徴とする請求項8に記載の移動局装置。
- 前記MBMS測定報告を行う条件は、自局の下りリンクのチャネル状態又は品質が、前記基地局装置から報知される閾値以下である場合であることを特徴とする請求項8に記載の移動局装置。
- 前記MBMS測定報告を行う条件は、下りリンク制御チャネル(PDCCH)を受信・復調・復号することはできたが、下りリンク制御チャネル(PDCCH)において指定される下りリンク共用チャネル(PDSCH)を復調・復号するための送信形態が、自局の下りリンクのチャネル状態又は品質と合わない場合であることを特徴とする請求項8に記載の移動局装置。
- 移動局装置へMBMSサービスを提供する基地局装置であって、
MBMS要求のトリガー基準および/またはMBMS測定報告のトリガー基準を前記移動局装置へ通知することを特徴とする基地局装置。 - 前記移動局装置からMBMSサービスフィードバック要求を受信した場合、前記移動局装置に対してフィードバックリソースを割当てることを特徴とする請求項14に記載の基地局装置。
- 前記移動局装置からMBMSサービス送信要求を受信した場合に、前記MBMSサービス送信要求で指定されたMBMSサービスを提供することを特徴とする請求項15に記載の基地局装置。
- 移動局装置とMBMSサービスを提供する基地局装置とを備える通信システムであって、
前記移動局装置は、MBMS要求を行う条件に合致した場合に、前記MBMS要求を前記基地局装置に対して送信し、
前記基地局装置は、前記移動局装置から受信した前記MBMS要求に基づいて、前記移動局装置に対してフィードバックリソースを割当て、
前記移動局装置は、前記基地局装置から指定されたフィードバックリソースを用いて、フィードバック情報を前記基地局装置に対して送信し、
前記基地局装置は、前記移動局装置から受信したフィードバック情報に基づいて、前記MBMSサービスの送信形態を変更することを特徴とする通信システム。 - 移動局装置とMBMSサービスを提供する基地局装置とを備える通信システムであって、
前記移動局装置は、MBMS測定報告を行う条件に合致した場合に、前記MBMS測定報告を前記基地局装置に対して送信し、
前記基地局装置は、前記移動局装置から受信したMBMS測定報告に基づいて、前記MBMSサービスの送信形態を変更することを特徴とする通信システム。
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Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2011020384A1 (zh) * | 2009-08-18 | 2011-02-24 | 中兴通讯股份有限公司 | 一种多媒体广播组播业务的调度和传输方法及其系统 |
US20110230179A1 (en) * | 2010-03-19 | 2011-09-22 | Lg Electronics Inc. | Wireless/wired backhaul-aware cell selection mechanism |
WO2011136279A1 (ja) * | 2010-04-30 | 2011-11-03 | 株式会社 エヌ・ティ・ティ・ドコモ | 移動通信システムにおけるユーザ装置及び方法 |
WO2011147246A1 (zh) * | 2010-05-28 | 2011-12-01 | 中兴通讯股份有限公司 | 多媒体广播组播上行资源分配及反馈方法与系统 |
JP2012157005A (ja) * | 2011-01-25 | 2012-08-16 | Ntt Docomo Inc | データ再送方法およびその装置 |
CN103069862A (zh) * | 2010-08-06 | 2013-04-24 | 京瓷株式会社 | 无线基站和无线通信方法 |
CN103687043A (zh) * | 2012-09-11 | 2014-03-26 | 普天信息技术研究院有限公司 | 一种建立无线资源控制协议连接的方法 |
JP2014513489A (ja) * | 2011-05-02 | 2014-05-29 | アルカテル−ルーセント | Mbmsサービス受信ステータス報告を開始するための方法および装置 |
EP2373069A3 (en) * | 2010-03-29 | 2014-09-17 | Fujitsu Limited | Base station apparatus and method for delivering multicast signal |
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JP2015527828A (ja) * | 2012-07-23 | 2015-09-17 | アップル インコーポレイテッド | 協調マルチポイント送信クラスタのアンカ付き絞り込みを行うための方法及びシステム |
WO2016121567A1 (ja) * | 2015-01-28 | 2016-08-04 | 京セラ株式会社 | ユーザ端末及び基地局 |
WO2016121787A1 (ja) * | 2015-01-30 | 2016-08-04 | 京セラ株式会社 | 基地局、プロセッサ及びユーザ端末 |
CN107251588A (zh) * | 2015-01-30 | 2017-10-13 | 高通股份有限公司 | 用于点对多点传输的ue反馈 |
JP2019527953A (ja) * | 2016-07-27 | 2019-10-03 | グァンドン オッポ モバイル テレコミュニケーションズ コーポレーション リミテッドGuangdong Oppo Mobile Telecommunications Corp., Ltd. | フィードバック情報を伝送する方法、端末機器、および基地局 |
Families Citing this family (45)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5158194B2 (ja) * | 2008-05-02 | 2013-03-06 | 富士通株式会社 | 基地局、移動機並びに方法 |
GB2464994A (en) * | 2008-11-04 | 2010-05-05 | Nec Corp | Communication system in which access control is dependent on mode of base station |
CN101841771B (zh) * | 2009-03-18 | 2013-05-22 | 电信科学技术研究院 | 实现单小区多媒体广播组播业务传输的方法及装置 |
CN102362441B (zh) * | 2009-03-22 | 2016-12-21 | Lg电子株式会社 | 使用多个天线的信道探测方法以及用于其的装置 |
US20110143675A1 (en) * | 2009-06-09 | 2011-06-16 | Qualcomm Incorporated | Method and apparatus for facilitating radio link monitoring and recovery |
US8441976B2 (en) * | 2009-06-29 | 2013-05-14 | Htc Corporation | Method of managing multimedia broadcast multicast service reception and related communication device |
BR112012032622B1 (pt) * | 2010-06-21 | 2022-04-12 | Alcatel Lucent | Métodos de e aparelho para a transmissão de estado de recepção de serviço de multidifusão de radiodifusão multimídia |
CN102378112B (zh) * | 2010-08-12 | 2016-06-15 | 中兴通讯股份有限公司 | 多媒体广播多播业务中统计用户设备信息的方法和系统 |
GB2485237A (en) | 2010-11-08 | 2012-05-09 | Nec Corp | MBMS provided by unicast or broadcast/multicast in dependence on the number of interested users. |
CN103314609B (zh) * | 2011-01-12 | 2017-02-08 | 诺基亚通信公司 | 用于在蜂窝通信网络中分配无线电资源的方法和其装置 |
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EP2953411B1 (en) * | 2011-10-31 | 2017-08-16 | Samsung Electronics Co., Ltd | Feedback method, user equipment, and network device for cooperative multi-point communication in communication system |
US9473967B2 (en) * | 2011-11-17 | 2016-10-18 | Qualcomm Incorporated | Method and apparatus for physical layer measurements in multicast broadcast multimedia service systems |
CN104025484B (zh) * | 2011-12-22 | 2017-05-17 | Lg电子株式会社 | 在无线接入系统中测量无线通信状态的方法及其设备 |
CN103260251B (zh) * | 2012-02-17 | 2016-06-15 | 华为技术有限公司 | 数据传输方法、基站及用户设备 |
SG11201407264WA (en) * | 2012-05-10 | 2014-12-30 | Nokia Solutions & Networks Oy | Service performance feedback in a radio access network |
US9516653B2 (en) | 2012-06-22 | 2016-12-06 | Lg Electronics Inc. | Scheduling method for device-to-device communication and apparatus for same |
US9363827B2 (en) | 2012-07-23 | 2016-06-07 | Broadcom Corporation | Vehicle gateway access in cellular network for vehicle communications |
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US9509469B2 (en) | 2013-04-04 | 2016-11-29 | Futurewei Technologies, Inc. | Device, network, and method for utilizing a downlink discovery reference signal |
US9900872B2 (en) * | 2013-04-17 | 2018-02-20 | Futurewei Technologies, Inc. | Systems and methods for adaptive transmissions in wireless network |
GB2513870A (en) * | 2013-05-07 | 2014-11-12 | Nec Corp | Communication system |
US9585134B2 (en) * | 2013-12-13 | 2017-02-28 | Sharp Kabushiki Kaisha | Systems and methods for multi-connectivity operation |
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US10638272B2 (en) * | 2015-01-09 | 2020-04-28 | Lg Electronics Inc. | Method and apparatus for controlling reception of SCPTM service using SCPTM-RNTI |
EP3244687B1 (en) * | 2015-01-09 | 2020-05-20 | LG Electronics Inc. | Method and device for establishing rrc connection for scptm reception |
JP6334005B2 (ja) * | 2015-01-28 | 2018-05-30 | 京セラ株式会社 | 基地局、ユーザ端末、及び通信制御方法 |
US9756483B2 (en) * | 2015-01-29 | 2017-09-05 | Acer Incorporated | Method of single-cell point-to-multipoint transmission |
WO2016163837A1 (en) * | 2015-04-09 | 2016-10-13 | Lg Electronics Inc. | Method and apparatus for handling l2 entity in continuity between sc-ptm transmission and mbsfn transmission in wireless communication system |
US10231165B2 (en) | 2015-05-13 | 2019-03-12 | Qualcomm Incorporated | RRM measurement and reporting for license assisted access |
EP3346767B1 (en) | 2015-08-30 | 2022-01-26 | LG Electronics Inc. | Method and device for performing cell reselection |
WO2017153628A1 (en) * | 2016-03-11 | 2017-09-14 | Nokia Technologies Oy | Feedback signaling management |
CN108023708B (zh) * | 2016-11-03 | 2022-09-13 | 中兴通讯股份有限公司 | 一种信息发送方法、装置、系统及相关设备 |
ES2895368T3 (es) * | 2017-05-04 | 2022-02-21 | Samsung Electronics Co Ltd | Procedimiento y aparato para transmitir información del margen de potencia en un sistema de comunicación |
CN109600833B (zh) * | 2017-09-30 | 2023-08-01 | 中国移动通信有限公司研究院 | 一种确定传输资源的方法及设备 |
CN113543179A (zh) * | 2017-11-16 | 2021-10-22 | 维沃移动通信有限公司 | 非连接态测量方法、终端及基站 |
EP3777301A1 (en) * | 2018-04-06 | 2021-02-17 | Nokia Technologies Oy | Optimized user equipment measurements for fast cell access |
CN110972078A (zh) * | 2018-09-30 | 2020-04-07 | 华为技术有限公司 | 多播/广播业务传输的方法、核心网网元和终端设备 |
BR112021006758A8 (pt) * | 2018-10-10 | 2021-08-03 | Huawei Tech Co Ltd | método e dispositivo de comunicação |
US11265879B2 (en) * | 2019-07-05 | 2022-03-01 | Qualcomm Incorporated | Group component carrier based updates |
US11438836B2 (en) * | 2019-08-16 | 2022-09-06 | Samsung Electronics Co., Ltd. | Methods and systems for managing SCPTM services |
CN115190437A (zh) * | 2019-12-10 | 2022-10-14 | Oppo广东移动通信有限公司 | 用于实施反馈辅助多播的方法、用户设备及基站 |
CN113225695B (zh) * | 2020-01-21 | 2022-12-20 | 大唐移动通信设备有限公司 | 一种多媒体广播组播服务业务接收及指示方法、设备、介质 |
CN115190432A (zh) * | 2021-04-01 | 2022-10-14 | 华为技术有限公司 | 一种通信方法及装置 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006515496A (ja) * | 2003-04-03 | 2006-05-25 | エルジー エレクトロニクス インコーポレイティド | 無線通信システムにおけるネットワーク接続制御装置及び方法 |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101369135B1 (ko) * | 2006-06-21 | 2014-03-05 | 엘지전자 주식회사 | 이동통신 시스템에서의 멀티미디어 및 방송서비스의 품질보장 방법 및 그 단말 |
US8369860B2 (en) * | 2006-08-18 | 2013-02-05 | Interdigital Technology Corporation | Sending and reducing uplink feedback signaling for transmission of MBMS data |
US8139524B2 (en) * | 2007-06-18 | 2012-03-20 | Lg Electronics Inc. | Control channel reception method for receiving broadcast or multicast service |
KR20120093455A (ko) * | 2008-08-29 | 2012-08-22 | 인터디지탈 패튼 홀딩스, 인크 | 다운링크 공유 서비스에 대한 피드백 신호를 전송하고 무선 송수신 유닛의 갯수를 추정하기 위한 방법 및 장치 |
-
2009
- 2009-01-22 US US12/864,962 patent/US8477644B2/en active Active
- 2009-01-22 CN CN2009801115160A patent/CN101981953A/zh active Pending
- 2009-01-22 WO PCT/JP2009/050956 patent/WO2009096305A1/ja active Application Filing
- 2009-01-22 JP JP2009551484A patent/JP4759088B2/ja not_active Expired - Fee Related
- 2009-01-22 EP EP09706956A patent/EP2239968A1/en not_active Withdrawn
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2006515496A (ja) * | 2003-04-03 | 2006-05-25 | エルジー エレクトロニクス インコーポレイティド | 無線通信システムにおけるネットワーク接続制御装置及び方法 |
Non-Patent Citations (4)
Title |
---|
"E-UTRAN; Overall description", 3GPP TS 36.300 V0.1.0 (2006-10), 2006, pages 38 - 39, XP008138954, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/Specs/archive/36_series/36.300/36300-010.zip> [retrieved on 20090407] * |
MOTOROLA: "Uplink Feedback for E-MBMS", 3GPP TSG RAN1 #49-BIS, JUNE 2007, R1-072710, XP008138930, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG1_RL1/TSGR1_49b/Docs/R1-072710.zip> [retrieved on 20090407] * |
MOTOROLA: "Uplink Feedback for E-MBMS", 3GPP TSG RAN2#57, February 2007 (2007-02-01), XP008138935, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG2_RL2/TSGR2_57/Documents/R2-070726.zip> [retrieved on 20090407] * |
PANASONIC: "Uplink feedback for eMBMS MBSFN operations", 3GPP TSG-RAN WG2 MEETING #58, R2-071777, May 2007 (2007-05-01), XP008138934, Retrieved from the Internet <URL:http://www.3gpp.org/ftp/tsg_ran/WG2_RL2/TSGR2_58/Documents/R2-071777.zip>> * |
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US20110230179A1 (en) * | 2010-03-19 | 2011-09-22 | Lg Electronics Inc. | Wireless/wired backhaul-aware cell selection mechanism |
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US9491643B2 (en) | 2010-04-30 | 2016-11-08 | Ntt Docomo, Inc. | User apparatus and method in mobile communication system |
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Also Published As
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CN101981953A (zh) | 2011-02-23 |
JP4759088B2 (ja) | 2011-08-31 |
EP2239968A1 (en) | 2010-10-13 |
US8477644B2 (en) | 2013-07-02 |
JPWO2009096305A1 (ja) | 2011-05-26 |
US20100309836A1 (en) | 2010-12-09 |
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