WO2016121915A1 - ユーザ端末、無線基地局、無線通信システム及び無線通信方法 - Google Patents
ユーザ端末、無線基地局、無線通信システム及び無線通信方法 Download PDFInfo
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- WO2016121915A1 WO2016121915A1 PCT/JP2016/052620 JP2016052620W WO2016121915A1 WO 2016121915 A1 WO2016121915 A1 WO 2016121915A1 JP 2016052620 W JP2016052620 W JP 2016052620W WO 2016121915 A1 WO2016121915 A1 WO 2016121915A1
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- user terminal
- transmission
- reception quality
- base station
- cqi
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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
- H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0001—Arrangements for dividing the transmission path
- H04L5/0003—Two-dimensional division
- H04L5/0005—Time-frequency
- H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
- H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/003—Arrangements for allocating sub-channels of the transmission path
- H04L5/0053—Allocation of signaling, i.e. of overhead other than pilot signals
- H04L5/0057—Physical resource allocation for CQI
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/08—Testing, supervising or monitoring using real traffic
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W24/00—Supervisory, monitoring or testing arrangements
- H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
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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
Definitions
- the present invention relates to a user terminal, a radio base station, a radio communication system, and a radio communication method in a next generation mobile communication system.
- LTE Long Term Evolution
- Non-Patent Document 1 a LTE successor system (also referred to as LTE-A) called LTE Advanced has been studied for the purpose of further broadbanding and speeding up from LTE, and LTE Rel. It is specified as 10/11.
- LTE Rel. 1 The 10/11 system band includes at least one component carrier (CC: Component Carrier) having the system band of the LTE system as a unit.
- CC Component Carrier
- CA carrier aggregation
- MTA multiple timing advance
- LTE Rel. 12 various scenarios in which a plurality of radio base stations are used in different frequency bands (carriers) are being studied. For example, when a single radio base station forms a plurality of cells, the above-described CA using the MTA is applied, whereas when the radio base stations forming the plurality of cells are completely different, dual connectivity (DC: Dual Connectivity) is being studied.
- DC Dual Connectivity
- E-UTRA Evolved Universal Terrestrial Radio Access
- E-UTRAN Evolved Universal Terrestrial Radio Access Network
- the number of CCs that can be set per user terminal (UE: User Equipment) is limited to a maximum of five.
- LTE Rel. Is a further successor system of LTE.
- In 13 in order to realize more flexible and high-speed wireless communication, it is considered to relax the limitation on the number of CCs that can be set per user terminal and to set 6 or more CCs.
- the transmission method of the existing system (Rel. 10 to 12) as it is.
- the so-called periodic CQI (P-CQI: Periodic-Channel Quality Indicator) is an uplink control channel using a format based on 5 CC or less.
- P-CQI Periodic-Channel Quality Indicator
- PUCCH Physical Uplink Control CHannel
- the present invention has been made in view of such points, and even when the number of component carriers that can be set in the user terminal is expanded to 6 or more, the user terminal capable of appropriately reporting the channel state,
- An object is to provide a radio base station, a radio communication system, and a radio communication method.
- One aspect of the user terminal of the present invention is a user terminal capable of communicating with a radio base station using six or more component carriers, and a measurement unit that measures reception quality of a downlink channel of each component carrier, A transmission unit that periodically transmits information related to the reception quality according to a timing designated by a radio base station, wherein the transmission unit has a PUCCH format of an existing system in which the number of component carriers set is 5 or less Information on reception quality of a plurality of component carriers is transmitted in the same subframe using the PUCCH format or PUSCH having a larger capacity than the above.
- the channel state can be reported appropriately.
- FIG. 1 shows carrier aggregation (CA) in LTE successor system (LTE Rel. 12) and LTE Rel. 13 is an explanatory diagram of the CC of CA studied in FIG.
- LTE Rel. 12 a maximum of five CCs (CC # 1 to CC # 5) are set for each user terminal, whereas LTE Rel. 13, extended carrier aggregation (CA enhancement) in which six or more CCs (cells) are set is being studied.
- CA enhancement extended carrier aggregation
- the extended CA as shown in FIG. 1, it is considered to set a maximum of 32 CCs (CC # 1 to CC # 32) per user terminal. In this case, it is possible to communicate with the user terminal using a maximum bandwidth of 640 MHz.
- the number of CCs used for communication can be increased / decreased or changed, and flexible and high-speed wireless communication can be realized.
- LTE 13 operation in a license-free frequency band, that is, an unlicensed band is also considered as a target.
- the unlicensed band for example, the same 2.4 GHz or 5 GHz band as Wi-Fi is used.
- LTE Rel. 13 considers carrier aggregation (LAA: License-Assisted Access) between a license band and an unlicensed band. For example, a CA combining a license band of 100 MHz and an unlicensed band of 300 MHz is also being studied.
- LAA License-Assisted Access
- the P-CQI is transmitted on the uplink control channel (PUCCH) using a format based on 5 CC or less.
- P-CQI is calculated separately for each CC in the user terminal, and is reported to this radio base station individually (for example, by RRC or the like) at a period set by the radio base station for each CC.
- P-CQI when there is no transmission data (when there is no PUSCH), P-CQI is transmitted according to PUCCH format 2, and when there is transmission data (when there is PUSCH), P -CQI is transmitted.
- P-CQIs for a plurality of CCs cannot be transmitted in the same subframe (the same TTI (Transmission Time Interval)).
- the user terminal reports only one P-CQI according to a predetermined rule and stops (drops) transmission of other P-CQIs.
- the P-CQI for only one CC is reported in one subframe (1 TTI), so it takes time to report the P-CQI of all CCs. As a result, the P-CQI reporting period corresponding to each CC becomes longer. For example, in CA using 32 CC, even when P-CQI is transmitted in all subframes in the uplink, the shortest period is 32 ms. Normally, since it is desirable for the radio base station side to acquire the CQI of the user terminal in a timely manner, it is not desirable that the P-CQI reporting period of each CC is lengthened.
- FIG. 2 shows an example table that defines the P-CQI reporting period in the existing system. Although 2, 5, 10, and 20 are defined in the cycle Npd, these cycles cannot be adopted by a CA of 20 CC or more.
- the present inventors pay attention to such a feature of CA, and the PUCCH format (hereinafter referred to as “large-capacity PUCCH format”) having a larger capacity than the PUCCH format of the existing system in which the number of CC settings is 5 or less.
- PUCCH format (hereinafter referred to as “large-capacity PUCCH format”) having a larger capacity than the PUCCH format of the existing system in which the number of CC settings is 5 or less.
- P-CQIs of multiple CCs are transmitted in the same subframe using PUSCH.
- the number of CCs that can be set per user terminal when performing CA is 32.
- the number of CCs that can be set per user terminal is not limited to this and can be changed as appropriate.
- the large-capacity PUCCH format is used for P-CQI reporting, and P-CQIs corresponding to a plurality of CCs are transmitted in the same uplink subframe (same TTI).
- P-CQIs for 8 CCs are transmitted in one subframe using the large-capacity PUCCH format.
- the number of CCs transmitted using the large-capacity PUCCH format is not limited to this.
- the period and timing for P-CQI reporting can be set in advance.
- CCs # 1 to # 8 are transmitted in a period of 20 ms and the first uplink subframe (first subframe from the left) shown in the figure.
- Timing is set.
- CCs # 9 to # 16 a cycle of 20 ms and a timing for transmission in the second uplink subframe (second subframe from the left) shown in the figure are set.
- CCs # 17 to # 24 a period of 10 ms and a timing for transmission in the third uplink subframe (third subframe from the left) shown in the figure are set.
- CCs # 25 to # 32 a cycle of 10 ms and a timing for transmission in the fourth uplink subframe (fourth subframe from the left) shown in the figure are set.
- a plurality of P-CQIs corresponding to CCs # 1 to # 8 are transmitted in the first subframe in FIG. 3, and CCs # 9 to # 16 are supported in the second subframe.
- a plurality of P-CQIs are transmitted, and in the third subframe, a plurality of P-CQIs corresponding to CCs # 17 to # 24 are transmitted, and in a fourth subframe, CCs # 25 to # 32 are supported.
- a plurality of P-CQIs to be transmitted are transmitted. Further, since the cycle is set to 10 ms for CCs # 17 to # 24, the latest P-CQI is transmitted also in the 13th subframe of the uplink in FIG. Similarly, for CC # 25 to CC # 32, the latest P-CQI is also transmitted in the 14th subframe.
- the large-capacity PUCCH is set in the user terminal. Also, the period and timing for P-CQI reporting for each CC are set from the radio base station by RRC or the like.
- the user terminal transmits P-CQIs for a maximum of 8 CCs in the same subframe (same TTI) using the large-capacity PUCCH format according to the period and timing.
- a method of reducing orthogonal spreading block codes of PUCCH format 3 is conceivable.
- the existing PUCCH format 3 the same bit sequence is copied to five or four time symbols and multiplied by an orthogonal spreading code. By multiplying different orthogonal spreading codes for each user, they are orthogonally multiplexed with each other.
- the orthogonal code length is 1, for example, it is possible to place different information bit sequences on five or four time symbols.
- the number of users that can be multiplexed on the same PRB is reduced. For example, when the orthogonal code length is 1, the bit sequence length that can be transmitted is five times or four times that of the existing PUCCH format 3, but the number of users that can be multiplexed is one.
- PUCCH format using frequency resources of 2 PRB or more as a new format (large-capacity PUCCH format).
- the PUCCH format to be transmitted by 2PRB is defined based on the configuration of the existing PUCCH format 3, it is possible to transmit a bit sequence twice as large as that of the existing PUCCH format 3.
- Which PRB number is used and which PRB is used for transmission may be determined by the UE according to the number of bits of HARQ-ACK or CSI (CQI, etc.) multiplexed on the PUCCH. It may be designated by higher layer signaling such as RRC, or the base station may instruct each subframe with a control signal such as PDCCH.
- a PUCCH format that uses multi-level modulation of 16QAM or more as a large capacity PUCCH format.
- the PUCCH format for 16QAM modulation of uplink control information (UCI) is defined based on the configuration of the existing PUCCH format 3, it is possible to transmit twice as many bit sequences as the existing PUCCH format 3 It becomes.
- Which modulation method is used may be determined by the UE according to the number of bits of HARQ-ACK or CSI multiplexed on the PUCCH, or may be designated in advance by higher layer signaling such as RRC,
- the base station may instruct each subframe with a control signal such as PDCCH.
- the encoding method for UCI such as HARQ-ACK and CSI, the mapping order to radio resources, and the temporal symbol position of the reference signal included in PUCCH format 3 , Etc. means to reuse. It is assumed that a reference signal sequence for generating a reference signal is different from 1PRB. For example, it is conceivable to use a reference signal sequence multiplexed on 2PRB PUSCH defined in the existing LTE.
- PUSCH as a new format that can multiplex uplink control signals of 6 or more CCs.
- the user terminal transmits the uplink control signal on the PUSCH even when the PUSCH is not transmitted.
- the user terminal when UL data transmission and UCI transmission occur in the same subframe, the user terminal applies a method of multiplexing UCI in the PUSCH instructed to perform UL data transmission.
- PUSCH does not have a configuration in which different users are code-multiplexed on the same PRB, and the number of information bits that can be included per PRB is large. Therefore, even if there is no UL data, if UCI is transmitted by PUSCH, it can be regarded as a large capacity PUCCH format and UCI can be transmitted.
- PUSCH is transmitted in a specific subframe / specific PRB based on PDCCH / EPDCCH (UL grant defined as DCI format 0, DCI format 4, etc.) and higher layer signaling from the base station. For example, PUSCH transmission can be performed even when only HARQ-ACK or CSI is transmitted.
- PDCCH / EPDCCH UL grant defined as DCI format 0, DCI format 4, etc.
- the PUSCH configuration allocation PRB and MCS for transmitting UCI may be specified in advance by upper layer signaling, for example, or specified as PDCCH / EPDCCH (DCI format 1A, DCI format 2D, etc.) instructing downlink data allocation DL assignment) or PDSCH information to which downlink data is transmitted may be determined.
- PDCCH / EPDCCH DCI format 1A, DCI format 2D, etc.
- PDSCH information to which downlink data is transmitted may be determined.
- the user terminal when a PUSCH including UL data is transmitted, the user terminal receives a PHICH corresponding to the PUSCH and determines whether to perform retransmission.
- HARQ is not applied to PUCCH that transmits HARQ-ACK and CSI. Therefore, when a PUSCH used as a large-capacity PUCCH format is transmitted (that is, when only UCI is included without including UL data), the user terminal does not have to perform reception and detection of PHICH corresponding to the PUSCH. It is also good. By doing in this way, it becomes unnecessary to perform unnecessary PHICH reception by the user terminal, so that the processing burden on the user terminal can be reduced.
- the user terminal may receive and detect PHICH corresponding to the PUSCH.
- a PUSCH that does not perform code spreading requires higher reception quality (signal-to-interference noise power ratio: SINR) than PUCCH.
- SINR signal-to-interference noise power ratio
- the channel state can be appropriately reported.
- the period and timing for P-CQI reporting are set in units of CC.
- a CC group including a plurality of CCs is set in advance, and P-CQI reporting is performed in units of CC groups.
- the period and timing for CQI reporting may be set. For example, in the CC shown in FIG. 3, CC # 1 to # 8, CC # 9 to # 16, CC # 17 to # 24, CC # 25 to # 32 are classified into CC groups, and each CC group You may set a period and timing.
- the large-capacity PUCCH format is used for P-CQI reporting as in the first mode, but for each CC, in addition to the period and timing for P-CQI reporting , CCs (cells) in the uplink, for example, CCs used for P-CQI reporting can be set.
- CC # 1 in the uplink is set.
- CCs # 9 to # 16 in addition to the 20 ms period and the timing of transmission in the second uplink subframe (second subframe from the left) shown in FIG. # 1 is set.
- CCs # 17 to # 24 in addition to the 10 ms period and the timing of transmission in the first uplink subframe (first subframe from the left) shown in FIG. # 2 is set.
- CCs # 25 to # 32 in addition to the 10 ms period and the timing of transmission in the second uplink subframe (second subframe from the left) shown in FIG. # 2 is set.
- FIG. 4 shows a case where two CCs are set in the uplink
- the present invention is not limited to this.
- one of the plurality of CCs to be set can be a PCell.
- a plurality of P-CQIs corresponding to CC # 1 to # 8 are transmitted in the first subframe, and the second subframe is transmitted. Then, a plurality of P-CQIs corresponding to CCs # 9 to # 16 are transmitted. Furthermore, since a cycle of 20 ms is set for CC # 1 to # 8 and CC # 9 to # 16, CC # 1 to # 8 is used in CC # 1 in the uplink in the 21st subframe. The latest P-CQIs corresponding to CCs # 9 to # 16 are transmitted, and the latest P-CQIs corresponding to CCs # 9 to # 16 are transmitted in the 22nd subframe.
- uplink CC # 2 a plurality of P-CQIs corresponding to CC # 17 to # 24 are transmitted in the first subframe, and CCs # 25 to # 32 are transmitted in the second subframe. A corresponding plurality of P-CQIs are transmitted. Since CCs # 17 to # 24 and CCs # 25 to # 32 have a period of 10 ms, in the CC # 2 of the uplink, the CC # 2 is used in the 11th, 21st, and 31st subframes. The latest P-CQIs corresponding to 17 to # 24 are transmitted. Also, the latest P-CQIs corresponding to CCs # 25 to # 32 are transmitted in the 12th, 22nd, and 32nd subframes.
- the large-capacity PUCCH is set in the user terminal.
- the period and timing for P-CQI reporting for each CC, and the uplink CC are set from the radio base station by RRC or the like.
- the user terminal transmits P-CQI for a maximum of 8 CCs in the same subframe using the large-capacity PUCCH format according to the cycle, timing, and uplink CC.
- the user terminal in this 2nd aspect is a user terminal in which UL CA is possible.
- a user terminal to which the second aspect is applied is capable of UL CA at a specific frequency and can perform P-CQI feedback described in the second aspect at that time. Assume that you have already reported to the base station.
- the channel state can be appropriately reported even when the number of component carriers that can be set in the user terminal is expanded to 6 or more.
- P-CQI is reported using a plurality of CCs in the uplink, it is possible to avoid reporting P-CQI biased to a specific CC (for example, CC # 1 of PCell). Also, in the example shown in FIG. 4, it is possible to simultaneously transmit a maximum of 16 CC P-CQIs in 1 TTI, and the transmission amount of P-CQIs in one transmission time can be dramatically improved. Further, since the amount of P-CQI transmission in one transmission time is improved, the time required for P-CQI reporting can be shortened in the user terminal.
- the P-CQI can be reported flexibly according to the P-CQI acquisition request.
- P-CQI can be reported by multiple CCs in the uplink as in the second mode, but P-CQI is controlled to be reported by CCell CC # 1 as much as possible.
- P-CQI is reported by a plurality of CCs as in the second mode. For this reason, a period and timing for P-CQI reporting are set for each CC, and a configuration can be made in which no CC is set in the uplink.
- the user terminal determines whether or not the transmission amount of P-CQI (or the number of CCs to be transmitted) exceeds a predetermined value when transmitting the P-CQI of the CC having the same timing, and sets the predetermined value.
- P-CQI is distributed and allocated to PCell CC # 1 and SCell CC # 2 and transmitted. For example, when transmitting a plurality of P-CQIs corresponding to CCs # 1 to # 8 and CCs # 17 to # 24 set with the first subframe as a timing, P for 8 CCs that can be transmitted in a large-capacity PUCCH format -It is determined whether or not the transmission amount of CQI is exceeded.
- the number of CCs set with the first subframe as a timing is 16, it is determined that the transmission amount of P-CQI for 8 CCs is exceeded, and the P-CQI to be transmitted is CC # 1 of PCell and SCell of SCell. It is distributed and allocated to CC # 2. As a result, as shown in FIG. 5, in the first subframe, P-CQIs corresponding to CCs # 1 to # 8 are assigned to CC # 1, and CCs # 17 to # 24 are assigned to CC # 2. A P-CQI is assigned.
- the same processing as in the first subframe is performed.
- P-CQIs corresponding to CCs # 9 to # 16 are assigned to CC # 1
- CCs # 25 to # 32 are assigned to CC # 2.
- a P-CQI is assigned. Similar processing is performed in the 21st subframe and the 22nd subframe.
- uplink CC # 2 a plurality of latest P-CQIs corresponding to CC # 17 to # 24 are transmitted in the first subframe and the 21st subframe, and the second subframe 22 In the first subframe, the latest P-CQIs corresponding to CCs # 25 to # 32 are transmitted.
- the large-capacity PUCCH is set in the user terminal.
- the period and timing for P-CQI reporting for each CC are set from the radio base station by RRC or the like.
- the user terminal performs the above-described determination processing (determination of whether or not the P-CQI transmission amount for 8 CCs that can be transmitted in the large-capacity PUCCH format exceeds the transmission amount) according to the cycle and timing described above, Are allocated to PCell CC # 1 and SCell CC # 2 to secure resources and transmit P-CQI.
- the user terminal in this 3rd aspect is a user terminal in which UL CA is possible.
- a user terminal to which the third aspect is applied is capable of UL CA at a specific frequency and can perform P-CQI feedback described in the second aspect at that time. Assume that you have already reported to the base station.
- the channel state can be appropriately reported.
- the coverage of the PCell is often good, and the P-CQI is transmitted by this single CC (uplink cell) as much as possible, so that battery consumption in the user terminal can be suppressed. Also, even when all P-CQIs cannot be transmitted by CC # 1 of PCell, P-CQIs that are suspended (dropped) can be suppressed, and channel tracking performance is improved in the radio base station be able to. For each CC, the period and timing for P-CQI reporting are set, and when the CC is not set in the uplink, higher layer signaling for setting the CC compared to the second mode The overhead can be reduced.
- the PCell P-CQI may always be allocated to the PCell.
- the CQI of the PCell is important for securing the connection between the radio base station and the user terminal, it is possible to reliably receive the PCQ CQI at the radio base station by assigning it to the PCell. it can.
- assignment may be made to CCell CC # 1 in ascending order of cell index.
- information transmitted and received via a cell having a small cell index is often highly important. Therefore, it is possible to transmit a CQI of a CC that receives highly important information using a PCell with good coverage. It becomes.
- the excess P-CQI according to a predetermined condition Transmission may be canceled.
- transmission may be stopped from P-CQI related to low priority information according to a predetermined priority.
- the priority As a method of determining the priority, it can be determined that the priority is higher in order of increasing cell index. In general, information transmitted and received via a cell having a small cell index is often highly important. Therefore, it is possible to transmit a CQI of a CC that receives highly important information using a PCell with good coverage. It becomes.
- the P-CQI of the specific CC in transmitting the P-CQI for a specific CC, is transmitted using PUCCH format 2, 2a, or 2b (existing transmission format).
- the PUCCH format used for P-CQI transmission of a specific CC and P-CQI (multiple P-CQI) transmissions of other CCs is changed.
- Information on a specific CC can be set in the user terminal by higher layer signaling such as RRC.
- the fourth aspect can be applied to any of the first to third aspects.
- An example in which the method of transmitting only the P-CQI of a specific CC in the existing PUCCH format is applied to the third aspect will be described with reference to FIG.
- FIG. 6 shows a case where the specific CC is CC # 1.
- CC # 1 which is a specific CC, is set with a period of 20 ms and a timing for transmission in the third uplink subframe (third subframe from the left) shown in FIG. Therefore, the user terminal transmits the P-CQI of CC # 1 in the PUCCH format 2 in the third subframe of CC # 1.
- the P-CQI of CC # 1 is transmitted in PUCCH format 2 in the 23rd subframe.
- the difference from the third aspect described above is that, in uplink CC # 1, the latest P-frames corresponding to CC # 2 to # 8 in the first subframe and the 21st subframe. This is the point where CQI is transmitted.
- the above-described large-capacity PUCCH format and the existing PUCCH format are set in the user terminal. Also, a specific CC and a period and timing for P-CQI reporting for each CC are set from the radio base station by RRC or the like.
- the user terminal transmits a corresponding P-CQI using the existing PUCCH format for the specific CC. Further, the user terminal performs the above-described determination processing (determination of whether or not the transmission amount of P-CQI for 8 CCs that can be transmitted in the large-capacity PUCCH format is exceeded) according to the period and timing. If so, resources are secured by distributing to PCell CC # 1 and SCell CC # 2, and P-CQI is transmitted.
- the user terminal in this 4th aspect is a user terminal in which UL CA is possible.
- the fourth aspect it is possible to appropriately report the channel state even when the number of component carriers that can be set in the user terminal is expanded to 6 or more.
- the radio base station side it is desirable to acquire the CQI of the user terminal in a timely manner, and such a request can be dealt with.
- the number of CCs is controlled (set) to 5 or less by CC removal or De-activation, etc. (that is, the number of CCs is equal to or less than the CA defined in Rel.12).
- the P-CQI is transmitted in the PUCCH format 2, 2a, or 2b (existing transmission format) of the existing system.
- the timings of a plurality of CCs overlap, only the P-CQI of the CC with a low cell index is left, and the transmission of P-CQI to other CCs is stopped.
- the fifth aspect can be applied to any of the first to fourth aspects.
- FIG. 7 assumes a case where, in the third aspect, the CC is controlled to 4 (CC # 1, CC # 9, CC # 17, CC # 25) by so-called CC removal and RRC. ing. Or, in case of so-called CC De-activation, the number of CCs activated by the MAC control signal (MAC Control Element) is controlled to 4 (CC # 1, CC # 9, CC # 17, CC # 25). Assumed.
- the user terminal transmits a P-CQI report in the PUCCH format 2 of the existing system. Also, even when P-CQI is set in different uplink CCs, if the TTI is the same, the user terminal leaves only the P-CQI of the CC with a low cell index, and the P-CQI for other CCs. Transmission of CQI is stopped.
- the user terminal compares the cell index, transmits the P-CQI of CC # 1 with a low cell index in PUCCH format 2, and stops (drops) transmission of CC # 17 with a high cell index. Similar processing is performed in the 21st TTI.
- the P-CQI of CC # 9 and the P-CQI of CC # 25 overlap. For this reason, the user terminal compares the cell indexes, transmits the P-CQI of CC # 9 having a low cell index in PUCCH format 2, and stops (drops) transmission of CC # 25 having a high cell index. Similar processing is performed in the 22nd TTI.
- the P-CQI of CC # 17 is transmitted in PUCCH format 2.
- the P-CQI of CC # 25 is transmitted in the PUCCH format 2 because there is no duplication of P-CQI in the 12th TTI and the 32nd TTI.
- the large-capacity PUCCH format is used. Apply P-CQI reporting.
- the channel state can be appropriately reported. Furthermore, when the number of component carriers is set to 5 or less, the existing communication method is applied, so that backward compatibility can be obtained. When the number of component carriers that can be set in the user terminal is expanded to 6 or more, it is possible to cope with a request from a radio base station that desires to acquire the CQI of the user terminal in a timely manner.
- Modification In the above first to fifth aspects, several modifications can be considered.
- processing when P-CQI and scheduling request (SR) overlap may be considered.
- the scheduling request has priority over the P-CQI and is transmitted on the PCell PUCCH.
- the user terminal performs control so that the scheduling request is regarded as information having a higher priority than P-CQI.
- it transmits using PUCCH format 2, 2a, or 2b (existing transmission format).
- processing when P-CQI and SRS (Sounding Reference Signal) overlap on the same CC may be considered. In this case, transmission of SRS may be stopped.
- the SRS is a Periodic SRS (P-SRS) in which a cycle or resource is set by higher layer signaling
- the P-CQI is controlled to be prioritized, and the ARS of the SRS (A-SRS) triggered by the UL grant. In this case, it may be controlled to give priority to A-SRS and stop transmission of P-CQI.
- FIG. 8 is a schematic configuration diagram showing an example of a wireless communication system according to an embodiment of the present invention.
- the radio communication system 1 is in a cell formed by a plurality of radio base stations 10 (11 and 12 (12a to 12c)) and each radio base station 10, and each radio base station 10 A plurality of user terminals 20 configured to be able to communicate with each other.
- Each of the radio base stations 10 is connected to the higher station apparatus 30 and connected to the core network 40 via the higher station apparatus 30.
- the radio base station 11 is composed of, for example, a macro base station having a relatively wide coverage, and forms a macro cell C1.
- the radio base stations 12 (12a to 12c) are small base stations having local coverage and form a small cell C2.
- the number of radio base stations 11 and 12 is not limited to the number shown in FIG.
- the same frequency band may be used, or different frequency bands may be used.
- the radio base stations 11 and 12 are connected to each other via an inter-base station interface (for example, optical fiber, X2 interface).
- the macro base station 11 may be referred to as a radio base station, an eNodeB (eNB), a transmission point, or the like.
- the small base station 12 may be called a pico base station, a femto base station, a Home eNodeB (HeNB), a transmission point, an RRH (Remote Radio Head), or the like.
- the user terminal 20 is a terminal that supports various communication methods such as LTE and LTE-A, and may include not only a mobile communication terminal but also a fixed communication terminal.
- the user terminal 20 can execute communication with other user terminals 20 via the radio base station 10.
- the upper station apparatus 30 includes, for example, an access gateway apparatus, a radio network controller (RNC), a mobility management entity (MME), and the like, but is not limited thereto.
- RNC radio network controller
- MME mobility management entity
- OFDMA Orthogonal Frequency Division Multiple Access
- SC-FDMA Single Carrier Frequency Division Multiple Access
- OFDMA is a multi-carrier transmission scheme that performs communication by dividing a frequency band into a plurality of narrow frequency bands (subcarriers) and mapping data to each subcarrier.
- SC-FDMA is a single-carrier transmission scheme that reduces interference between terminals by dividing the system bandwidth into bands consisting of one or continuous resource blocks for each terminal and using a plurality of terminals with mutually different bands. is there.
- the uplink and downlink radio access methods are not limited to these combinations.
- downlink channels include a downlink shared channel (PDSCH) shared by each user terminal 20, a broadcast channel (PBCH: Physical Broadcast Channel), a downlink L1 / L2 control channel, and the like. Used. User data, higher layer control information, and predetermined SIB (System Information Block) are transmitted by PDSCH. Also, a synchronization signal, MIB (Master Information Block), etc. are transmitted by PBCH.
- PDSCH downlink shared channel
- PBCH Physical Broadcast Channel
- SIB System Information Block
- Downlink L1 / L2 control channels include PDCCH (Physical Downlink Control Channel), EPDCCH (Enhanced Physical Downlink Control Channel), PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid-ARQ Indicator Channel), and the like.
- Downlink control information (DCI: Downlink Control Information) including scheduling information of PDSCH and PUSCH is transmitted by PDCCH.
- the number of OFDM symbols used for PDCCH is transmitted by PCFICH.
- the HAICH transmission confirmation signal (ACK / NACK) for PUSCH is transmitted by PHICH.
- the EPDCCH is frequency division multiplexed with a PDSCH (downlink shared data channel) and may be used to transmit DCI or the like in the same manner as the PDCCH.
- an uplink shared channel (PUSCH: Physical Uplink Shared Channel), an uplink control channel (PUCCH: Physical Uplink Control Channel), and a random access channel (PRACH) shared by each user terminal 20 are used. Physical Random Access Channel) is used.
- User data and higher layer control information are transmitted by PUSCH.
- downlink radio quality information (CQI: Channel Quality Indicator), a delivery confirmation signal, and the like are transmitted by PUCCH.
- a random access preamble (RA preamble) for establishing a connection with the cell is transmitted by the PRACH.
- a channel quality measurement reference signal (SRS: Sounding Reference Signal) and a demodulation reference signal (DM-RS: Demodulation Reference Signal) for demodulating PUCCH and PUSCH are transmitted as uplink reference signals.
- SRS Sounding Reference Signal
- DM-RS Demodulation Reference Signal
- FIG. 9 is a diagram illustrating an example of the overall configuration of the radio base station 10 according to the present embodiment.
- the radio base station 10 (including the radio base stations 11 and 12) includes a plurality of transmission / reception antennas 101 for MIMO transmission, an amplifier unit 102, a transmission / reception unit 103, a baseband signal processing unit 104, and a call processing unit 105. And a transmission path interface 106.
- the transmission / reception unit 103 includes a transmission unit and a reception unit.
- User data transmitted from the radio base station 10 to the user terminal 20 via the downlink is input from the higher station apparatus 30 to the baseband signal processing unit 104 via the transmission path interface 106.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC Medium Access
- Retransmission control for example, HARQ (Hybrid Automatic Repeat reQuest) transmission processing
- HARQ Hybrid Automatic Repeat reQuest
- the downlink control signal is also subjected to transmission processing such as channel coding and inverse fast Fourier transform, and transferred to each transmitting / receiving unit 103.
- Each transmission / reception unit 103 converts the downlink signal output from the baseband signal processing unit 104 by precoding for each antenna into a radio frequency band signal and transmits the signal.
- the radio frequency signal frequency-converted by the transmission / reception unit 103 is amplified by the amplifier unit 102 and transmitted from the transmission / reception antenna 101.
- the transmitter / receiver 103 can apply a transmitter / receiver, a transmitter / receiver circuit, or a transmitter / receiver used in the technical field according to the present invention.
- the radio frequency signal received by each transmitting / receiving antenna 101 is amplified by the amplifier unit 102.
- Each transmitting / receiving unit 103 receives the upstream signal amplified by the amplifier unit 102.
- the transmission / reception unit 103 converts the frequency of the received signal into a baseband signal and outputs it to the baseband signal processing unit 104.
- the baseband signal processing unit 104 performs fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT: Inverse Discrete Fourier Transform) processing, and error correction on user data included in the input upstream signal.
- FFT fast Fourier transform
- IDFT inverse discrete Fourier transform
- Decoding, MAC retransmission control reception processing, RLC layer, and PDCP layer reception processing are performed and transferred to the upper station apparatus 30 via the transmission path interface 106.
- the call processing unit 105 performs call processing such as communication channel setting and release, state management of the radio base station 10, and radio resource management.
- the transmission path interface 106 transmits and receives signals to and from the higher station apparatus 30 via a predetermined interface. Further, the transmission path interface 106 may transmit / receive a signal (backhaul signaling) to / from an adjacent radio base station via an interface between base stations (for example, an optical fiber or an X2 interface).
- a signal backhaul signaling
- FIG. 10 is a main functional configuration diagram of the baseband signal processing unit 104 included in the radio base station 10 according to the present embodiment. Note that FIG. 10 mainly shows functional blocks of characteristic portions in the present embodiment, and the wireless base station 10 also has other functional blocks necessary for wireless communication.
- the radio base station 10 is configured to include at least a control unit (scheduler) 301, a transmission signal generation unit 302, and a reception processing unit 303.
- the control unit (scheduler) 301 controls scheduling of downlink data signals transmitted on the PDSCH, downlink control signals transmitted on the PDCCH and / or extended PDCCH (EPDCCH). It also controls scheduling of system information, synchronization signals, downlink reference signals such as CRS and CSI-RS. Further, scheduling of uplink reference signals, uplink data signals transmitted on PUSCH, uplink control signals transmitted on PUCCH and / or PUSCH, and the like is controlled.
- the control unit 301 can be configured with a controller, a control circuit, or a control device used in the technical field according to the present invention.
- control unit 301 can control the transmission signal generation unit 302 in order to control the CCs to be measured in the user terminal 20 connected to the radio base station 10. Specifically, the control unit 301 notifies the transmission signal generation unit 302 of the CC information included in the TAG, and performs control so as to generate a signal (for example, higher layer signaling) including the CC information (first layer signaling). Embodiment). In addition, the control unit 301 notifies the transmission signal generation unit 302 of the measurement gap configuration set for each TAG, and performs control so as to generate a signal (for example, higher layer signaling) including the measurement gap configuration (second layer signaling). Embodiment).
- the transmission signal generator 302 generates a DL signal (downlink control signal, downlink data signal, downlink reference signal, etc.) based on an instruction from the controller 301. For example, the transmission signal generation unit 302 generates a signal including the CC information based on the CC information included in the timing advance group (TAG) notified from the control unit 301 (first and second modes). In this case, the transmission signal generation unit 302 can generate a signal including the TAG CC list (first and second modes). Further, the transmission signal generation unit 302 generates a signal including the measurement gap configuration based on the measurement gap configuration set for each TAG notified from the control unit 301 (second mode).
- TAG timing advance group
- the transmission signal generation unit 302 can be configured by a signal generator or a signal generation circuit used in the technical field according to the present invention.
- the reception processing unit 303 performs reception processing (for example, demapping, demodulation, decoding, etc.) on the UL signal (uplink control signal, uplink data signal, uplink reference signal, etc.) transmitted from the user terminal 20.
- the reception processing unit 303 performs reception processing (such as measurement of received power (RSRP) and channel state) on the measurement result transmitted from the user terminal 20.
- the reception processing unit 303 performs reception processing on the measurement result for each TAG transmitted from the user terminal 20 (first mode).
- the reception process part 303 performs a reception process with respect to the measurement result for every CC transmitted from the user terminal 20 (2nd aspect). Then, the reception processing unit 303 outputs the measurement result after the reception processing to the control unit 301.
- the reception processing unit 303 can be configured by a signal processor or a signal processing circuit used in the technical field according to the present invention.
- FIG. 11 is a diagram illustrating an example of the overall configuration of the user terminal 20 according to the present embodiment.
- the user terminal 20 includes a plurality of transmission / reception antennas 201 for MIMO transmission, an amplifier unit 202, a transmission / reception unit 203, a baseband signal processing unit 204, and an application unit 205.
- the transmission / reception unit 203 may include a transmission unit and a reception unit.
- the radio frequency signals received by the plurality of transmission / reception antennas 201 are each amplified by the amplifier unit 202.
- Each transmitting / receiving unit 203 receives the downlink signal amplified by the amplifier unit 202.
- the transmission / reception unit 203 converts the frequency of the received signal into a baseband signal and outputs it to the baseband signal processing unit 204.
- the transmission / reception unit 203 can be configured by a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device used in the technical field according to the present invention.
- the baseband signal processing unit 204 performs FFT processing, error correction decoding, retransmission control reception processing, and the like on the input baseband signal.
- the downlink user data is transferred to the application unit 205.
- the application unit 205 performs processing related to layers higher than the physical layer and the MAC layer.
- broadcast information in the downlink data is also transferred to the application unit 205.
- uplink user data is input from the application unit 205 to the baseband signal processing unit 204.
- the baseband signal processing unit 204 performs retransmission control transmission processing (for example, HARQ transmission processing), channel coding, precoding, discrete Fourier transform (DFT) processing, IFFT processing, and the like.
- the data is transferred to the transmission / reception unit 203.
- the transmission / reception unit 203 converts the baseband signal output from the baseband signal processing unit 204 into a radio frequency band signal and transmits the signal.
- the radio frequency signal frequency-converted by the transmission / reception unit 203 is amplified by the amplifier unit 202 and transmitted from the transmission / reception antenna 201.
- the transmission / reception unit 203 can transmit / receive a signal to / from a radio base station that sets a TAG composed of one or more cells.
- the transmission / reception unit 203 can transmit / receive signals to / from a plurality of radio base stations that each set a cell group (CG) composed of one or more cells.
- CG cell group
- FIG. 12 is a main functional configuration diagram of the baseband signal processing unit 204 included in the user terminal 20. Note that FIG. 12 mainly shows functional blocks of characteristic portions in the present embodiment, and the user terminal 20 also has other functional blocks necessary for wireless communication.
- the user terminal 20 includes at least a reception signal processing unit 401, a measurement unit 402, a control unit 403, and a transmission signal generation unit 404.
- the reception signal processing unit 401 performs reception processing (for example, demapping, demodulation, decoding, etc.) on the DL signal (for example, downlink control signal transmitted from the radio base station, downlink data signal transmitted by PDSCH, etc.). I do.
- the reception signal processing unit 401 outputs information received from the radio base station 10 to the control unit 403. For example, the reception signal processing unit 401 outputs broadcast information, system information, paging information, RRC signaling, DCI, and the like to the control unit 403.
- the received signal processing unit 401 may be configured by a signal processor, a signal processing circuit or a signal processing device, and a measuring device, a measurement circuit or a measuring device, which are described based on common recognition in the technical field according to the present invention. it can.
- the measurement unit 402 measures received power (RSRP), reception quality (RSRQ), and channel state using the received signal, and outputs the result to the control unit 403.
- RSRP received power
- RSSQ reception quality
- channel state using the received signal
- the control unit 403 includes the measurement result of the measurement unit 402 and various information (period, timing, CC, specific CC for P-CQI report) notified from the radio base station 10 via the reception signal processing unit 401. Based on this, a P-CQI is generated. The control unit 403 further instructs the transmission signal generation unit 404 how to allocate the P-CQI to the uplink resource.
- the user terminal 20 is configured with the large-capacity PUCCH, and uses the large-capacity PUCCH format according to the period and timing, and the P-CQI for a maximum of 8 CCs is the same subframe (the same
- the control unit 403 instructs the transmission signal generation unit 404 to perform transmission using TTI).
- control unit 403 instructs the transmission signal generation unit 404 to transmit P-CQI for a maximum of 8 CCs in the same subframe using a large capacity PUCCH format according to the period, timing, and CC. To do.
- the control unit 403 instructs the transmission signal generation unit 404 to allocate resources to PCell CC # 1 and SCell CC # 2 and to transmit P-CQI.
- the control unit 403 instructs the transmission signal generation unit 404 to transmit only the P-CQI of the specific CC using the existing PUCCH format (for example, PUCCH format 2).
- the existing PUCCH format for example, PUCCH format 2.
- the control unit 403 instructs the transmission signal generation unit 404 to secure resources by distributing to PCell CC # 1 and SCell CC # 2 and to transmit P-CQI.
- the control unit 403 transmits the P-CQI report in the PUCCH format 2 of the existing system.
- the generation unit 404 is instructed. At this time, even if the CCs are different, if the P-CQI is duplicated in the same TTI, only the transmission of the P-CQI of the CC with a low cell index is instructed to the transmission signal generator 404, and the other CCs The P-CQI transmission for is stopped.
- the control unit 403 may be a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present invention.
- the transmission signal generation unit 404 generates a UL signal based on an instruction from the control unit 403, performs a mapping process, and outputs the UL signal to the transmission / reception unit 203.
- the transmission signal generation unit 404 generates an uplink control signal such as a delivery confirmation signal (HARQ-ACK) and channel state information (CSI) based on an instruction from the control unit 403.
- the transmission signal generation unit 404 generates an uplink data signal based on an instruction from the control unit 403. For example, the transmission signal generation unit 404 is instructed by the control unit 403 to generate an uplink data signal when the UL grant is included in the downlink control signal notified from the radio base station 10.
- each functional block is realized by one physically coupled device, or may be realized by two or more physically separated devices connected by wire or wirelessly and by a plurality of these devices. Good.
- radio base station 10 and the user terminal 20 are realized using hardware such as ASIC (Application Specific Integrated Circuit), PLD (Programmable Logic Device), and FPGA (Field Programmable Gate Array). May be.
- the radio base station 10 and the user terminal 20 may be realized by a computer apparatus including a processor (CPU), a communication interface for network connection, a memory, and a computer-readable storage medium holding a program. Good.
- the processor and memory are connected by a bus for communicating information.
- the computer-readable recording medium is a storage medium such as a flexible disk, a magneto-optical disk, a ROM, an EPROM, a CD-ROM, a RAM, and a hard disk.
- the program may be transmitted from a network via a telecommunication line.
- the radio base station 10 and the user terminal 20 may include an input device such as an input key and an output device such as a display.
- the functional configurations of the radio base station 10 and the user terminal 20 may be realized by the hardware described above, may be realized by a software module executed by a processor, or may be realized by a combination of both.
- the processor controls the entire user terminal by operating an operating system. Further, the processor reads programs, software modules and data from the storage medium into the memory, and executes various processes according to these.
- the program may be a program that causes a computer to execute the operations described in the above embodiments.
- the control unit 301 of the radio base station 10 may be realized by a control program stored in a memory and operated by a processor, and may be similarly realized for other functional blocks.
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Abstract
Description
第1の態様では、P-CQIの報告にあたって上記大容量PUCCHフォーマットを用い、上りリンクの同一サブフレーム(同一TTI)で複数のCCに対応するP-CQIを送信する。この態様では、大容量PUCCHフォーマットにより、8CC分のP-CQIを1サブフレームで送信する場合について説明する。なお、大容量PUCCHフォーマットを用いて送信するCC数はこれに限られない。
第2の態様では、第1の態様と同様にP-CQIの報告にあたって上記大容量PUCCHフォーマットが用いられるが、各CCに対しては、P-CQI報告のための周期とタイミングとに加えて、上りリンクにおけるCC(セル)、例えば、P-CQIの報告で使用するCCを設定することができる。
第3の態様では、第2の態様と同様に上りリンクにおいて複数CCでP-CQIを報告することができるが、P-CQIは可能な限りPCellのCC#1で報告するように制御する。ただし、同一サブフレームで報告するP-CQIの量が所定量を超える場合には、上記第2の態様と同様に複数CCでP-CQIを報告する。このため、各CCに対しては、P-CQI報告のための周期とタイミングとが設定され、上りリンクにおけるCCを設定しない構成とすることができる。
上述の第3の態様では、大容量PUCCHフォーマットで送信可能な8CC分のP-CQIの送信量を超えるか否の判断を行い、送信量を超えている場合にPCellのCC#1とSCellのCC#2とに分散してリソースを確保し、P-CQIを送信しているが、このような制御にいくつかの条件を付加してもよい。
第4の態様では、特定のCCに対するP-CQIの送信にあたっては、特定CCのP-CQIを、PUCCHフォーマット2、2a、または2b(既存の送信形式)を用いて送信する。第4の態様では、特定CCのP-CQI送信と、他のCCのP-CQI(複数P-CQIの)送信とで使用するPUCCHフォーマットを変更する。特定のCCに関する情報は、RRCなどの上位レイヤシグナリングにより、ユーザ端末に設定することができる。
第5の態様では、CC removalまたはDe-activationなどにより、CC数が5以下に制御(設定)された場合(すなわち、Rel.12で規定済のCAと同じかそれ以下のCC数になった場合)、P-CQIが、既存システムのPUCCHフォーマット2、2a、または2b(既存の送信形式)で送信される。また、複数CCのタイミングが重複した場合には、セルインデックスの低いCCのP-CQIだけ残し、他のCCに対するP-CQIの送信は中止する。第5の態様は、上記第1~第4の態様のいずれにおいても適用することができる。
以上の第1~第5の態様においていくつかの変形例も考えられる。
例えば、大容量PUCCHフォーマットにおいて、P-CQIとスケジューリングリクエスト(SR)がオーバーラップした場合の処理を考慮するようにしてもよい。具体的には、P-CQIとスケジューリングリクエストがオーバーラップした場合に、スケジューリングリクエストをP-CQIに優先し、PCellのPUCCHで送信する。この場合、ユーザ端末では、スケジューリングリクエストをP-CQIよりも優先度の高い情報とみなす制御が行われる。この他、スケジューリングリクエストがある場合には、PUCCHフォーマット2、2a、または2b(既存の送信形式)を用いて送信する。この場合には、複数CCに対するP-CQIを同一サブフレームで送信することができないため、セルインデックスなどを用いた優先度に基づいて1CCのP-CQIのみを送信し、その他のCCに対応するP-CQIの送信は中止する。
以下、本発明の一実施の形態に係る無線通信システムの構成について説明する。この無線通信システムでは、上記第1~第5の態様(変形例を含む)のいずれか又はこれらの組み合わせが適用される。
Claims (10)
- 6個以上のコンポーネントキャリアを利用して無線基地局と通信可能なユーザ端末であって、
各コンポーネントキャリアの下りチャネルの受信品質を測定する測定部と、
前記無線基地局から指定されたタイミングにしたがって、前記受信品質に関する情報を周期的に送信する送信部と、を備え、
前記送信部は、コンポーネントキャリアの設定数が5個以下となる既存システムのPUCCHフォーマットと比較して容量が大きいPUCCHフォーマット又はPUSCHを用いて、複数のコンポーネントキャリアの受信品質に関する情報を同じサブフレームで送信することを特徴とするユーザ端末。 - 前記送信部は、コンポーネントキャリアごとに設定されたタイミングと、受信品質に関する情報を送信するコンポーネントキャリアに関する情報とに基づいて、複数のコンポーネントキャリアの受信品質に関する情報を送信することを特徴とする請求項1に記載のユーザ端末。
- 前記送信部は、同じサブフレームにおいて複数のコンポーネントキャリアの受信品質に関する情報を送信する際、当該複数のコンポーネントキャリアの受信品質に関する情報量が所定値以下である場合には特定のコンポーネントキャリアで送信し、所定値を超える場合には特定のコンポーネントキャリア及び他のコンポーネントキャリアに分散して送信することを特徴とする請求項1に記載のユーザ端末。
- 前記送信部は、前記複数のコンポーネントキャリアの内、セルインデックスに基づいて設定された優先度が高いコンポーネントキャリアに対応する受信品質を示す情報を前記特定のコンポーネントキャリアで優先して送信することを特徴とする請求項3に記載のユーザ端末。
- 前記所定値が、前記特定のコンポーネントキャリアの容量と、前記他のコンポーネントキャリアの容量との合計であり、前記送信部は、所定の優先度にしたがって、前記所定値を超過した容量に対応する受信品質を示す情報の送信を中止することを特徴とする請求項3に記載のユーザ端末。
- 前記送信部は、1つのサブフレームで1つのコンポーネントキャリアの受信品質を送信する場合、既存システムのPUCCHフォーマット2、2a、または2bを用いて送信を行うことを特徴とする請求項1から請求項5のいずれかに記載のユーザ端末。
- 前記複数のコンポーネントキャリアの設定数が5以下になった場合、前記送信部は、各コンポーネントキャリアの受信品質に関する情報を、前記PUCCHフォーマット2、2a、または2bを用いて個別に送信を行うことを特徴とする請求項6に記載のユーザ端末。
- 6個以上のコンポーネントキャリアを利用するユーザ端末と通信可能な無線基地局であって、
前記ユーザ端末において測定される下りチャネルの受信品質に関する情報を周期的に送信するための送信タイミングを、前記ユーザ端末に通知する通知部と、
コンポーネントキャリアの設定数が5個以下となる既存システムのPUCCHフォーマットと比較して容量が大きいPUCCHフォーマット又はPUSCHを用いて、複数のコンポーネントキャリアの受信品質に関する情報を同じサブフレームで受信する受信部と、を備えることを特徴とする無線基地局。 - 6個以上のコンポーネントキャリアを利用するユーザ端末と、無線基地局とを具備する無線通信システムであって、
前記ユーザ端末は、
各コンポーネントキャリアの下りチャネルの受信品質を測定する測定部と、
前記無線基地局から指定されたタイミングにしたがって、前記受信品質に関する情報を周期的に送信する送信部と、を含み、
前記送信部は、コンポーネントキャリアの設定数が5個以下となる既存システムのPUCCHフォーマットと比較して容量が大きいPUCCHフォーマット又はPUSCHを用いて、複数のコンポーネントキャリアの受信品質に関する情報を同じサブフレームで送信し、
前記無線基地局は、
前記タイミングを前記ユーザ端末に通知する通知部と、
前記容量が大きいPUCCHフォーマット又はPUSCHを用いて、前記複数のコンポーネントキャリアの受信品質に関する情報を、前記サブフレームで受信する受信部と、を含むことを特徴とする無線通信システム。 - 6個以上のコンポーネントキャリアを利用して無線基地局と通信可能なユーザ端末の無線通信方法であって、
各コンポーネントキャリアの下りチャネルの受信品質を測定する工程と、
前記無線基地局から指定されたタイミングにしたがって、前記受信品質に関する情報を周期的に送信する工程とを含み、
前記送信する工程は、コンポーネントキャリアの設定数が5個以下となる既存システムのPUCCHフォーマットと比較して容量が大きいPUCCHフォーマット又はPUSCHを用いて、複数のコンポーネントキャリアの受信品質に関する情報を同じサブフレームで送信することを特徴とする無線通信方法。
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2019215898A1 (ja) * | 2018-05-10 | 2019-11-14 | 株式会社Nttドコモ | ユーザ端末及び無線通信方法 |
CN110622594A (zh) * | 2017-08-10 | 2019-12-27 | Oppo广东移动通信有限公司 | 传输数据的方法、网络设备和终端设备 |
Families Citing this family (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101997461B1 (ko) * | 2016-05-10 | 2019-07-08 | 엘지전자 주식회사 | 무선 통신 시스템에서 기지국과 단말이 데이터 신호를 송수신하는 방법 및 이를 지원하는 장치 |
US11502775B2 (en) * | 2017-10-19 | 2022-11-15 | Ntt Docomo, Inc. | User terminal and radio communication method |
EP3793283A4 (en) * | 2018-05-10 | 2022-07-20 | Ntt Docomo, Inc. | USER TERMINAL AND WIRELESS BASE STATION |
CN110999438B (zh) * | 2018-08-03 | 2022-10-04 | 苹果公司 | 新无线电未许可带中的基于设备能力且独立的寻呼 |
USD959658S1 (en) | 2020-10-12 | 2022-08-02 | Stryker Corportation | Medical waste collection unit |
Family Cites Families (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US9113325B2 (en) * | 2007-04-25 | 2015-08-18 | Texas Instruments Incorporated | Signaling of random access preamble time-frequency location in wireless networks |
KR101590010B1 (ko) * | 2009-02-27 | 2016-01-29 | 엘지전자 주식회사 | 무선 통신 시스템에서 하향링크 멀티 캐리어에 대한 채널 품질 정보를 전송하는 방법 |
KR101670513B1 (ko) * | 2009-06-01 | 2016-10-31 | 엘지전자 주식회사 | 무선 통신 시스템에서 측정 결과 보고 방법 및 장치 |
EP2908585B1 (en) * | 2009-06-19 | 2017-06-07 | Interdigital Patent Holdings, Inc. | Signaling uplink control information in lte-a |
EP2515595A4 (en) * | 2009-12-17 | 2017-01-25 | LG Electronics Inc. | Method and apparatus for transmitting channel status information efficiently in a multi-carrier wireless communication system |
CN102812658B (zh) * | 2010-01-08 | 2015-12-16 | 交互数字专利控股公司 | 针对多个载波的信道状态信息传输的方法及设备 |
US8711714B2 (en) * | 2010-03-31 | 2014-04-29 | Fujitsu Limited | Method and system for simulating wireless networks |
JP2013531431A (ja) * | 2010-06-21 | 2013-08-01 | 富士通株式会社 | 無線通信システムに用いるチャネル状態情報フィードバック方法及び設備 |
CN101908951B (zh) * | 2010-08-16 | 2016-05-11 | 中兴通讯股份有限公司 | 一种信道状态信息的报告方法及基站 |
CN101917259B (zh) * | 2010-08-16 | 2016-06-15 | 中兴通讯股份有限公司 | 非周期信道状态信息报告的触发方法及基站 |
US9369234B2 (en) | 2010-08-16 | 2016-06-14 | Qualcomm Incorported | Channel state information feedback for carrier aggregation |
US20120127869A1 (en) * | 2010-11-22 | 2012-05-24 | Sharp Laboratories Of America, Inc. | Multiple channel state information (csi) reporting on the physical uplink shared channel (pusch) with carrier aggregation |
KR101995293B1 (ko) * | 2011-02-21 | 2019-07-02 | 삼성전자 주식회사 | 반송파 집적 기술을 사용하는 시분할 무선통신시스템에서 부차반송파의 활성화 또는 비활성화 방법 및 장치 |
WO2013006593A1 (en) * | 2011-07-04 | 2013-01-10 | Dinan Esmael Hejazi | Broadcast channel in multicarrier systems |
US8797985B2 (en) * | 2011-10-03 | 2014-08-05 | Telefonaktiebolaget L M Ericsson (Publ) | Channel selection and channel-state information collision handling |
CN103107855B (zh) * | 2011-11-09 | 2016-03-02 | 华为技术有限公司 | 传输信息的方法及装置 |
EP3264660B8 (en) * | 2012-01-27 | 2019-06-26 | BlackBerry Limited | Method and apparatus for transmitting uplink control information in wireless communication system |
US10158472B2 (en) * | 2012-02-28 | 2018-12-18 | Lg Electronics Inc. | Method for transmitting channel state information report and user equipment, and method for receiving channel state information report and base station |
JP5743965B2 (ja) * | 2012-06-26 | 2015-07-01 | 株式会社Nttドコモ | ユーザ端末、無線通信システム、無線通信方法及び無線基地局 |
GB2514574B (en) * | 2013-05-29 | 2015-08-12 | Broadcom Corp | Method, apparatus and computer program for search and synchronisation |
JP6183998B2 (ja) | 2013-07-09 | 2017-08-23 | ライオン株式会社 | 液体消臭剤 |
US9980258B2 (en) * | 2013-08-06 | 2018-05-22 | Lg Electronics Inc. | Method and apparatus for wireless communication |
EP3152970B1 (en) * | 2014-06-09 | 2020-03-11 | Airvana LP | Scheduling the same resource in radio access networks |
US9935807B2 (en) * | 2014-09-26 | 2018-04-03 | Telefonaktiebolaget L M Ericsson (Publ) | Discovery signal design |
US10575205B2 (en) * | 2014-10-20 | 2020-02-25 | Qualcomm Incorporated | Transport block size determination |
-
2016
- 2016-01-29 EP EP16743518.9A patent/EP3253156B1/en active Active
- 2016-01-29 HU HUE16743518A patent/HUE050429T2/hu unknown
- 2016-01-29 ES ES18209164T patent/ES2799273T3/es active Active
- 2016-01-29 CN CN201680007735.4A patent/CN107211420B/zh active Active
- 2016-01-29 EP EP18209164.5A patent/EP3471475B1/en active Active
- 2016-01-29 HU HUE18209164A patent/HUE050689T2/hu unknown
- 2016-01-29 WO PCT/JP2016/052620 patent/WO2016121915A1/ja active Application Filing
- 2016-01-29 PL PL18209164T patent/PL3471475T3/pl unknown
- 2016-01-29 US US15/547,146 patent/US20180007682A1/en not_active Abandoned
- 2016-01-29 JP JP2016572174A patent/JP6412961B2/ja active Active
-
2018
- 2018-10-01 JP JP2018186474A patent/JP6636112B2/ja active Active
-
2019
- 2019-01-25 US US16/258,039 patent/US11337187B2/en active Active
Non-Patent Citations (3)
Title |
---|
LG ELECTRONICS: "Multi- cell Periodic CSI Transmission", 3GPP TSG RAN WG1 MEETING #69 R1-122269, 21 May 2012 (2012-05-21), XP050600532 * |
NOKIA CORPORATION ET AL.: "New SI Proposal: LTE Carrier Aggregation Enhancement Beyond 5 Carriers", 3GPP TSG RAN MEETING #65 RP-141418, 9 September 2014 (2014-09-09), XP050783751 * |
See also references of EP3253156A4 * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN110622594A (zh) * | 2017-08-10 | 2019-12-27 | Oppo广东移动通信有限公司 | 传输数据的方法、网络设备和终端设备 |
JP2020535668A (ja) * | 2017-08-10 | 2020-12-03 | オッポ広東移動通信有限公司Guangdong Oppo Mobile Telecommunications Corp., Ltd. | データを伝送する方法、ネットワーク装置及び端末装置 |
JP7178368B2 (ja) | 2017-08-10 | 2022-11-25 | オッポ広東移動通信有限公司 | データを伝送する方法、ネットワーク装置及び端末装置 |
US11570798B2 (en) | 2017-08-10 | 2023-01-31 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Data transmission method, network device and terminal device |
WO2019215898A1 (ja) * | 2018-05-10 | 2019-11-14 | 株式会社Nttドコモ | ユーザ端末及び無線通信方法 |
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EP3253156B1 (en) | 2020-08-05 |
CN107211420A (zh) | 2017-09-26 |
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