WO2011162131A1 - 基地局装置及び通信制御方法 - Google Patents
基地局装置及び通信制御方法 Download PDFInfo
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- WO2011162131A1 WO2011162131A1 PCT/JP2011/063605 JP2011063605W WO2011162131A1 WO 2011162131 A1 WO2011162131 A1 WO 2011162131A1 JP 2011063605 W JP2011063605 W JP 2011063605W WO 2011162131 A1 WO2011162131 A1 WO 2011162131A1
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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
- H04L5/0091—Signaling for the administration of the divided path
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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
Definitions
- the present invention relates to a base station apparatus and a communication control method in a next generation mobile communication system.
- UMTS Universal Mobile Telecommunications System
- WSDPA High Speed Downlink Packet Access
- HSUPA High Speed Uplink Packet Access
- CDMA Wideband Code Division Multiple Access
- the third generation system can achieve a maximum transmission rate of about 2 Mbps on the downlink using generally a fixed bandwidth of 5 MHz.
- a maximum transmission rate of about 300 Mbps on the downlink and about 75 Mbps on the uplink can be realized using a variable band of 1.4 MHz to 20 MHz.
- LTE-A LTE Advanced
- LTE-A LTE Advanced
- the LTE system is a system in which one or two or more physical channels are shared by a plurality of mobile station apparatuses UE for both uplink and downlink.
- a channel shared by a plurality of mobile station apparatuses UE is generally called a shared channel (or may be called a data channel).
- it is a PUSCH (Physical Uplink Shared Channel) in the uplink
- the downlink PDSCH Physical Downlink Shared CHannel
- PDCCH Physical Downlink Control CHannel
- the downlink control information transmitted on this PDCCH includes, for example, Downlink Scheduling Information (Non-Patent Document 1).
- This Downlink Scheduling Information includes, for example, downlink resource block (Resource Block) allocation information, identification information of mobile station different UEs, number of streams, information on precoding vector (Precoding Vector), data size, modulation method, Contains information on HARQ (Hybrid Automatic Repeat reQuest).
- Precoding Vector precoding vector
- HARQ Hybrid Automatic Repeat reQuest
- LTE-A system LTE-A system
- a plurality of component carriers should be gathered to increase the bandwidth (carrier aggregation).
- the above-described PDCCH needs to be transmitted for each component carrier. That is, it is necessary to transmit the PDSCH and the PDCCH for demodulating the PDSCH using the same component carrier.
- radio resources allocated to the PDCCH increase and it is difficult to increase the data rate (frequency utilization efficiency).
- An object of the present invention is to provide a base station apparatus and a communication control method that can be used.
- the base station apparatus of the present invention includes a downlink control information generating unit that generates downlink control information for demodulating a data channel individually transmitted for each of a plurality of basic frequency blocks allocated to a user terminal, and the downlink A transmission unit that transmits a downlink control channel including link control information, and the downlink control information generation unit is used to demodulate a plurality of data channels allocated to two or more basic frequency blocks, and The downlink control information to which identification information capable of identifying two or more fundamental frequency blocks is added is generated.
- the base station apparatus of the present invention is used to demodulate a plurality of data channels allocated to two or more basic frequency blocks, and is provided with identification information that can identify these two or more basic frequency blocks. Since link control information is generated, there is no need to generate downlink control information for each basic frequency block and transmit a downlink control channel, so a plurality of basic frequency blocks (component carriers) are gathered together to increase the bandwidth. Even in this case, it is possible to improve the data rate by reducing the radio resources allocated to the downlink control channel (PDCCH).
- PDCH downlink control channel
- the communication control method of the present invention includes a generation step of generating downlink control information for demodulating a data channel individually transmitted for each of a plurality of basic frequency blocks allocated to a user terminal, and the downlink control information Transmitting a downlink control channel including: a plurality of basic frequency blocks used for demodulating a plurality of data channels assigned to two or more basic frequency blocks in the generating step.
- the downlink control information to which the identification information that can identify is added is generated.
- the communication control method of the present invention is used to demodulate a plurality of data channels allocated to two or more basic frequency blocks, and is provided with identification information that can identify these two or more basic frequency blocks. Since link control information is generated, there is no need to generate downlink control information for each basic frequency block and transmit a downlink control channel, so a plurality of basic frequency blocks (component carriers) are gathered together to increase the bandwidth. Even in this case, it is possible to improve the data rate by reducing the radio resources allocated to the downlink control channel (PDCCH).
- PDCH downlink control channel
- the present invention it is possible to improve the data rate by reducing the radio resources allocated to the PDCCH even when a plurality of component carriers are gathered to increase the bandwidth.
- FIG. 1 is an overall view of a mobile communication system according to an embodiment of the present invention. It is a schematic block diagram of the base station apparatus which concerns on the said embodiment. It is a schematic block diagram of the mobile station apparatus which concerns on the said embodiment. It is a functional block diagram of the transmission processing part in the baseband signal processing part of the base station apparatus which concerns on the said embodiment. It is a functional block diagram of the baseband signal processing part which the mobile station apparatus which concerns on the said embodiment has.
- FIG. 1 is a diagram showing a hierarchical bandwidth configuration defined in LTE-A.
- an LTE system that performs radio communication using a variable system band, and a basic frequency block is added or reduced using the system band (for example, the maximum system band) of the LTE system as a basic unit (basic frequency block).
- This is a hierarchical bandwidth configuration in the case where there is an LTE-A system that performs radio communication using a variable system band in which the system band can be switched.
- wireless communication is performed with a variable system bandwidth of 100 MHz or less, and in the LTE system, wireless communication is performed with a variable system bandwidth of 20 MHz or less.
- the system band of the LTE-A system is at least one basic frequency block having the system band of the LTE system as a unit.
- a basic frequency block is called a component carrier (CC).
- CC component carrier
- Such a combination of a plurality of component carriers to increase the bandwidth is called carrier aggregation.
- a mobile station apparatus UE (User Equipment) # 1 is a mobile station apparatus compatible with the LTE-A system (also compatible with the LTE system) and can support a system band up to 100 MHz.
- UE # 3 is a mobile station apparatus compatible with the LTE system (not compatible with the LTE-A system), and can support a system band up to 20 MHz (base band).
- DCI Downlink Control Information
- PDSCH / PUSCH shared data channel
- a carrier indicator field (hereinafter referred to as “CIF”) indicating which component carrier (hereinafter referred to as “CC”) is assigned to the PDSCH is designated as downlink control information (hereinafter referred to as “CIF”).
- DCI downlink control information
- a method of notifying a CC to which a PDSCH is assigned by bit information constituting this CIF is being studied.
- this is a method in which a mobile station apparatus and a base station apparatus hold a common CIF table, and a CC to which a PDSCH is assigned is specified by CIF bit information notified from the base station apparatus. It is agreed that this CIF is composed of 3 bits.
- FIG. 2 is an explanatory diagram of a method for notifying a CC to which a PDSCH is assigned by CIF.
- FIG. 2A shows a case where PDSCH and this PDCCH for demodulating PDSCH are transmitted by the same CC
- FIG. 2B shows a case where PDCCH for demodulating PDSCH is transmitted by an adjacent CC. Note that FIG. 2 shows a case where the system band is composed of two CCs.
- the mobile station apparatus can grasp the CC to which the PDSCH is assigned to the own apparatus based on the above-described CIF table.
- the present inventor has focused on the fact that the increase in data rate is hindered due to the fact that the number of PDCCHs for PDSCH demodulation is the same as that of PDSCH, and has reached the present invention.
- the DCI is used to demodulate a plurality of PDSCHs assigned to two or more CCs and to which CIF, which is identification information that can identify the two or more CCs, is added. And the PDCCH including this DCI is transmitted.
- CCs to which two or more PDSCHs are assigned by a single PDCCH can be notified to the mobile station apparatus, so that even when a plurality of CCs are gathered together to increase the bandwidth, the radio resources assigned to the PDCCHs are reduced.
- the data rate can be improved by reduction.
- FIG. 3 is an explanatory diagram of a method for notifying a CC to which a PDSCH is assigned by CIF in a base station apparatus to which the communication control method according to the present invention is applied.
- the bit information of CIF is “010”
- two PDSCHs (PDSCH1, PDSCH2) are assigned to the same CC (CC0) and adjacent CC (CC1) as the PDCCH.
- CC0 CC0
- CC1 adjacent CC
- the mobile station apparatus by decoding this CIF, it is possible to grasp two CCs to which the PDSCH is assigned to the own apparatus based on a CIF table described later.
- FIG. 4 is a diagram showing an example of the CIF table used in the communication control method according to the present invention.
- CCs to which PDSCHs are assigned are defined in association with the number of CCs that can be used for wireless communication and bit information that constitutes the CIF.
- FIG. 4 shows a CIF table when the number of CCs is 2 to 5 (CC0 to CC4).
- CC0 to CC4 the number of CCs is 2 to 5
- PDCCH is assigned to CC0.
- This CIF table is held by both the base station apparatus to which the communication control method according to the present invention is applied and the mobile station apparatus that performs radio communication with the base station apparatus.
- CIF In the case of 100, it is further determined that the CC to which the PDSCH is allocated is the four neighboring CCs.
- the bit information remaining in such a CIF table is utilized as bit information for notifying a plurality of CCs to which the PDSCH is allocated.
- PDSCHs are grouped as CCs to which PDSCHs are assigned (hereinafter PDSCHs are referred to in this way).
- the mobile station apparatus can allocate the PDSCH to the own apparatus by decoding the CIF.
- a plurality of CCs can be grasped.
- CCs to which two or more PDSCHs are assigned by a single PDCCH can be notified to the mobile station apparatus, so that even when a plurality of CCs are gathered together to increase the bandwidth, the radio resources assigned to the PDCCHs are reduced.
- the data rate can be improved by reduction.
- the base station apparatus by notifying a plurality of CCs to which the PDSCH is assigned by the CIF in this way, the radio resources assigned to the PDCCH are reduced and the data rate is increased.
- DCI downlink control information
- i) information of all fields of DCI is selectively shared, ii) information of all fields other than the RA (Resource Allocation) field of DCI is shared, iii) Sharing information of some fields other than the RA field of DCI.
- iii) information of all fields other than the RA (Resource Allocation) field of DCI is shared, iii) Sharing information of some fields other than the RA field of DCI.
- FIG. 5 is an explanatory diagram of DCI fields shared in the base station apparatus according to the present invention.
- FIG. 5A shows a case where information of all fields of DCI is shared (the above i))
- FIG. 5B shows a case where information of all fields other than the RA field of DCI is shared (the above) This is shown for ii)).
- DCI includes resource allocation information (RA) determined for each mobile station apparatus, modulation scheme / channel coding rate (MCS) information, information for HARQ, new data Includes fields that define identifiers (NDI: New Data Indicator), redundancy versions (RV: Redundancy Version), PUCCH (Physical Uplink Control Channel) transmission power control commands (TPC: Transmission Power Control), etc. .
- RA resource allocation information
- MCS modulation scheme / channel coding rate
- information of all fields included in DCI is standardized. That is, information on all fields included in DCI is shared regardless of the number of PDSCHs assigned to a plurality of CCs.
- PDSCH is allocated using CIF bit information without requiring processing such as compression on information of each field of DSI.
- a plurality of CCs can be notified to the mobile station apparatus.
- the information of each field is specified without reflecting the channel quality in a plurality of CCs, there is a situation in which the data rate is reduced as compared with the case where PDCCH for PDSCH demodulation is assigned for each CC. Can occur.
- RA field information included in DCI is individually specified for each of a plurality of PDSCHs assigned to a plurality of CCs.
- the RA field information (resource allocation information) can be allocated reflecting the channel quality of each CC.
- the RA field information is allocated reflecting the propagation path quality of a plurality of CCs, so resources corresponding to the propagation path quality of each CC are allocated. Since it can be allocated, it is possible to notify the mobile station apparatus of a plurality of CCs to which the PDSCH is allocated using the CIF bit information while suppressing the reduction of the data rate.
- information in some fields other than the DCI RA field is shared. That is, a part of information other than the RA field included in DCI is individually specified for each of a plurality of PDSCHs assigned to a plurality of CCs.
- the information of the MCS field can be specified reflecting the channel quality of each CC.
- the MCS corresponding to the channel quality of each CC is selected. Since the selection can be made, it is possible to notify a plurality of CCs to which the PDSCH is allocated using the CIF bit information while suppressing the reduction of the data rate.
- a field that is not shared that is, a field that is individually associated with the PDSCH assigned to each CC
- information on a specific field can be reduced or reduced depending on the importance.
- the TPC command specified in the TPC field when it is necessary only for the primary CC mainly used for PDSCH transmission (when it is not necessary for the CC other than the primary CC), the TPC field is changed to another field ( For example, it can be used as an individual field (NDI field).
- the number of bits allocated to the RA field can be reduced and used as an individual field for other fields (for example, HARQ field).
- mapping mode of transport blocks is not necessarily limited to this.
- the present invention can be applied to a mode in which a transport block is mapped across a plurality of CCs.
- the DCI HARQ field can be shared.
- FIG. 6 is a diagram for explaining a DCI RA field information compression method in the base station apparatus according to the present invention.
- 6A shows DCI before compression of RA field information
- FIG. 6B shows DCI after compression of RA field information.
- the compression of the RA field information is, for example, the size of a resource block group (RBG: Resource Block Group) at the time of resource allocation to the mobile station apparatus, and RBG when generating DCI (PDCCH) for each PDSCH allocated to the CC. It can be realized by making it larger than the size of.
- FIG. 6 shows a case where the RBG size is doubled when resources are allocated to the mobile station apparatus.
- RA field information resource allocation information
- the RA field information is compressed by 5 bits.
- the resource allocation information of the PDSCH of one CC is specified in the compressed 5 bits, while the resource allocation information of the PDSCH of the other CC is specified in the 5 bits newly formed by the compression. It can be specified.
- the compression method of RA field information when the DCI format is assumed to be the same (the same transmission mode and the same bandwidth) has been described, but this compression method is different when the DCI format is different. It is also possible to apply to.
- the DCI format corresponding to a plurality of CCs notified by CIF is a DCI format having a different bandwidth
- the DCI format corresponding to a plurality of CCs notified by CIF is a DCI format of a different transmission mode, it is preferable to align the DCI format with the larger DCI format (number of bits).
- the above describes a method of bundling these CCs by allocating a plurality of CCs to CIF bit information and notifying a plurality of CCs to which a PDSCH is allocated by a single PDCCH.
- the communication control method according to the present invention instead of the method of notifying the plurality of CCs to which the PDSCH is assigned in this way, or in addition to the method, two or more can be obtained by assigning a plurality of subframes to the CIF bit information. It is also possible to report a plurality of subframes to which PDSCH is assigned.
- FIG. 7 is an explanatory diagram of a method for notifying a CC and / or subframe to which a PDSCH is assigned by CIF in the base station apparatus according to the present invention.
- FIG. 7 shows radio resources for two subframes in a system band composed of two CCs.
- bundling a plurality of CCs by assigning a plurality of CCs to CIF bit information is referred to as “CC bundling”, and assigning a plurality of subframes to CIF bit information.
- Bundling a plurality of subframes is referred to as “subframe bundling”.
- subframe bundling for example, bundling the same subframe and the subsequent subframe with the same CC as the PDCCH may be considered (FIG. 7B).
- CC bundling and subframe bundling for example, the same CC as the PDCCH and the CC adjacent thereto are bundled, and subframes to which the PDCCH is allocated in these CCs and subsequent to them It is conceivable to perform bundling with the subframe to be performed (FIG. 7D).
- FIG. 7A shows a case of notifying a plurality of CCs to which a plurality of PDSCHs are assigned by a single PDCCH by CC bundling.
- FIG. 7B shows a case in which a plurality of subframes to which a plurality of PDSCHs are assigned by a single PDCCH are notified by subframe bundling.
- FIGS. 7C and 7D show a case where a plurality of CCs and a plurality of subframes to which a plurality of PDSCHs are allocated by a single PDCCH are notified by CC bundling and subframe bundling.
- PDCCH is assigned to CC0.
- two PDSCHs are assigned to the same CC (CC0) and adjacent CC (CC1) as PDCCH
- the case where one PDSCH is allocated to CC (CC1) adjacent to PDCCH is shown.
- the mobile station apparatus decodes the CIF and assigns the CC to which the PDSCH is assigned to the own apparatus for each subframe. I can grasp it.
- the PDSCH is the same CC as the PDCCH and is assigned to the same subframe (subframe 0) and the subsequent subframe (subframe 1). ing.
- the mobile station apparatus decodes the CIF to obtain a plurality of subframes to which PDSCH is assigned to the own apparatus. I can grasp it.
- the mobile station apparatus since it is possible to notify the mobile station apparatus of subframes to which two or more PDSCHs are allocated by a single PDCCH, even when a plurality of CCs are gathered together to increase the bandwidth, they can be allocated to the PDCCH. It is possible to improve the data rate by reducing radio resources.
- PDSCH is assigned to the same CC (CC0) and adjacent CC (CC1) as PDCCH, and is the same CC (CC0) as PDCCH and follows. The case where it is assigned to a subframe (subframe 1) is shown.
- CC CC1
- subframe 1 A case where CC (CC1) is assigned to the subsequent subframe (subframe 1) is shown.
- the mobile station apparatus decodes the CIF, thereby decoding a plurality of PDSCHs assigned to the own apparatus. CC and subframe can be grasped.
- the PDCCH It is possible to reduce the allocated radio resources and improve the data rate.
- the base station apparatus can retransmit the PDSCH that has not been received in response to the ACK / NACK signal from the mobile station apparatus.
- FIG. 8 is an explanatory diagram of a PDSCH retransmission method in the base station apparatus according to the present invention.
- the mobile station apparatus can appropriately receive PDSCH1 and cannot properly receive PDSCH2.
- an ACK / NACK signal is individually responded to each PDSCH from the mobile station apparatus. In this case, an ACK signal is responded to PDSCH1, and a NACK signal is responded to PDSCH2.
- the base station apparatus When receiving the response of the ACK / NACK signal individually as described above, the base station apparatus according to the present invention changes the bit information of the CIF and retransmits only the PDSCH that has not been properly received using the same CC as the previous one. .
- CIF 001 is set, and PDSCH2 is retransmitted only by CC1.
- CC1 CC1
- a NACK signal is transmitted, that is, an ACK / NACK signal is transmitted collectively to the plurality of PDSCHs.
- the base station apparatus that has received the NACK signal maintains the CIF bit information and retransmits all PDSCHs using the same CC as the previous one.
- base station a base station apparatus
- mobile station a mobile station apparatus
- FIG. 9 is a diagram for explaining a configuration of mobile communication system 1 having mobile station 10 and base station 20 according to the present embodiment.
- the mobile communication system 1 shown in FIG. 9 is a system that includes, for example, an LTE system or SUPER 3G.
- the mobile communication system 1 may be called IMT-Advanced or 4G.
- the mobile communication system 1 includes a base station 20 and a plurality of mobile stations 10 (10 1 , 10 2 , 10 3 ,...) That communicate with the base station 20.
- the base station 20 is connected to the higher station apparatus 30, and the higher station apparatus 30 is connected to the core network 40.
- the mobile station 10 communicates with the base station 20 in the cell 50.
- 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
- each mobile station (10 1 , 10 2 , 10 3 ,... 10 n ) has the same configuration and function, the following description will be given as the mobile station 10 unless otherwise noted.
- the mobile station 10 wirelessly communicates with the base station 20, but more generally user equipment (User Equipment) as a user terminal including both the mobile station and the fixed terminal device. Good.
- User Equipment User Equipment
- OFDMA is applied to the downlink and SC-FDMA or clustered DFT-spread OFDM (Clustered DFT-Spread OFDM) is applied to the uplink as the radio access scheme.
- 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 method that reduces interference between terminals by dividing a system band into bands each consisting of one or continuous resource blocks for each terminal, and a plurality of terminals using different bands. .
- Clustered DFT spread OFDM assigns non-contiguous clustered subcarrier groups (clusters) to one mobile station UE, and applies discrete Fourier transform spread OFDM to each cluster, thereby providing uplink multiples. This is a method for realizing connection.
- downlink physical channels PDSCH shared by each mobile station 10 and downlink control channels (PDCCH, PCFICH, PHICH) are used.
- the downlink control channel may be referred to as a downlink L1 / L2 control channel.
- User data including higher layer control signals, that is, normal data signals are transmitted by the PDSCH. Transmission data is included in this user data.
- PUSCH For the uplink, PUSCH that is shared and used by the mobile station 10 and PUCCH that is an uplink control channel are used. User data is transmitted by this PUSCH. Also, UL ACK / NACK, downlink radio quality information (CQI: Channel Quality Indicator), etc. are transmitted by PUCCH.
- CQI Channel Quality Indicator
- FIG. 10 is a schematic configuration diagram of the base station 20 according to the present embodiment.
- the base station 20 includes a transmission / reception antenna 201, an amplifier unit 202, a transmission / reception unit 203, a baseband signal processing unit 204, a call processing unit 205, and a transmission path interface 206. .
- User data transmitted in the downlink from the base station 20 to the mobile station 10 is input to the baseband signal processing unit 204 via the transmission path interface 206 from the higher station apparatus 30 located above the base station 20.
- PDCP layer processing such as sequence number assignment, user data division / combination, RLC (Radio Link Control) retransmission control transmission processing such as RLC (Radio Link Control) retransmission control transmission processing, MAC (Medium Access Control) ) Retransmission control, for example, HARQ transmission processing, scheduling, transmission format selection, channel coding, Inverse Fast Fourier Transform (IFFT) processing, precoding processing is performed and transferred to the transmission / reception unit 203 .
- the downlink control channel signal is also subjected to transmission processing such as channel coding and inverse fast Fourier transform, and transferred to the transmission / reception unit 203.
- the baseband signal processing unit 204 further notifies the mobile station 10 of control information for communication in the cell 50 through a broadcast channel.
- the broadcast information for communication in the cell 50 includes, for example, system bandwidth in the uplink or downlink, identification information (Root Sequence Index) of a root sequence for generating a random access preamble signal in the PRACH, and the like. It is.
- the transmission / reception unit 203 performs frequency conversion processing for converting the baseband signal output from the baseband signal processing unit 204 into a radio frequency band, and then is amplified by the amplifier unit 202 and transmitted from the transmission / reception antenna 201.
- the base station 20 receives the transmission wave transmitted from the mobile station 10 by the transmission / reception antenna 201.
- a radio frequency signal received by the transmission / reception antenna 201 is amplified by the amplifier unit 202, frequency-converted by the transmission / reception unit 203, converted into a baseband signal, and input to the baseband signal processing unit 204.
- the baseband signal processing unit 204 performs FFT processing, IDFT processing, error correction decoding, MAC retransmission control reception processing, RLC layer, and PDCP layer reception processing on user data included in the input baseband signal. Then, the data is transferred to the higher station apparatus 30 via the transmission path interface 206.
- the call processing unit 205 performs call processing such as communication channel setting and release, state management of the base station 20, and wireless resource management.
- FIG. 11 is a schematic configuration diagram of mobile station 10 according to the present embodiment. As illustrated in FIG. 11, the mobile station 10 includes a transmission / reception antenna 101, an amplifier unit 102, a transmission / reception unit 103, a baseband signal processing unit 104, and an application unit 105.
- the radio frequency signal received by the transmission / reception antenna 101 is amplified by the amplifier unit 102, converted in frequency by the transmission / reception unit 103, and converted into a baseband signal.
- the baseband signal is subjected to FFT processing, error correction decoding, retransmission control reception processing, and the like by the baseband signal processing unit 104.
- downlink user data is transferred to the application unit 105.
- the application unit 105 performs processing related to layers higher than the physical layer and the MAC layer. Also, broadcast information in the downlink data is also transferred to the application unit 105.
- uplink user data is input from the application unit 105 to the baseband signal processing unit 104.
- the baseband signal processing unit 104 transmission processing of retransmission control (HARQ (Hybrid ARQ)), channel coding, DFT processing, IFFT processing, and the like are performed and transferred to the transmission / reception unit 103.
- HARQ Hybrid ARQ
- frequency conversion processing for converting the baseband signal output from the baseband signal processing unit 104 into a radio frequency band is performed, and then amplified by the amplifier unit 102 and transmitted from the transmission / reception antenna 101.
- FIG. 12 is a functional block diagram of the baseband signal processing unit 204 and some upper layers included in the base station 20 according to the present embodiment.
- the baseband signal processing unit 204 mainly includes functional blocks of the transmission processing unit. Show.
- FIG. 12 exemplifies a base station configuration that can support a maximum of M (CC0 to CCM) component carriers (number of CCs). Transmission data for the mobile station 10 under the control of the base station 20 is transferred from the higher station apparatus 30 to the base station 20.
- M CC0 to CCM
- the control information generation unit 300 generates a higher control signal for higher layer signaling (for example, RRC signaling) for each user.
- higher layer signaling for example, RRC signaling
- the control information generation unit 300 includes higher-level control including a command that specifies the set of CCs N 1 to N 4 to be bundled A signal can be generated.
- the upper control signal including a command for designating the set of CCs N 1 to N 4 to be bundled corresponds to the block designation information in the claims, and the control information generation unit 300 includes the block designation information generation unit. Equivalent to.
- the data generation unit 301 outputs the transmission data transferred from the higher station apparatus 30 as user data for each user.
- the component carrier selection unit (CC selection unit) 302 selects a CC to be used for wireless communication with the mobile station 10 for each user. Specifically, the component carrier selection unit 302 selects one or more CCs for each user based on information from the scheduling unit 310. In accordance with CC allocation information set for each user in component carrier selection section 302, the upper control signal and transmission data are distributed to channel coding section 303 of the corresponding CC.
- the scheduling unit 310 controls CC allocation to the subordinate mobile stations 10 according to the communication quality of the entire system band. Specifically, the scheduling unit 310 determines the number of CCs and CC positions allocated to communication with the mobile station 10. A determination result regarding the number of CCs and the CC position is notified to the control information generation unit 300 and the component carrier selection unit 302.
- uplink scheduling either SC-FDMA or clustered DFT spread OFDM is dynamically controlled (for each subframe).
- CC (uplink) to which clustered DFT spread OFDM is applied the number of clusters and cluster resources are determined.
- the scheduling unit 310 controls resource allocation in each CC0 to CCM. For example, the scheduling unit 310 performs scheduling by distinguishing between LTE terminal users and LTE-A terminal users.
- the scheduling unit 310 receives the transmission data and the retransmission instruction from the higher station apparatus 30 and the channel estimation value and the CQI of the resource block from the receiving unit that measured the uplink reception signal.
- the scheduling unit 310 performs scheduling of downlink allocation information, uplink allocation information, and upper and lower shared channel signals while referring to the retransmission instruction, channel estimation value, and CQI input from the higher station apparatus 30.
- the propagation path in mobile communication varies depending on the frequency due to frequency selective fading. Therefore, when transmitting user data to the mobile station 10, a resource block with good communication quality is assigned to each mobile station 10 for each subframe (referred to as adaptive frequency scheduling). In adaptive frequency scheduling, a mobile station 10 with good channel quality is selected and assigned to each resource block. Therefore, the scheduling unit 310 allocates resource blocks expected to improve throughput using the CQI for each resource block fed back from each mobile station 10. Also, a resource block is allocated for each cluster to an uplink to which clustered DFT spread OFDM is applied. Further, an MCS (coding rate, modulation scheme) that satisfies a predetermined block error rate with the allocated resource block is determined. Parameters satisfying the MCS (coding rate, modulation scheme) determined by the scheduling unit 310 are set in the channel coding units 303, 308, 312 and the modulation units 304, 309, 313.
- MCS coding rate, modulation scheme
- the baseband signal processing unit 204 includes a channel encoding unit 303, a modulation unit 304, and a mapping unit 305 corresponding to the maximum user multiplexing number N within 1 CC.
- the channel coding unit 303 channel-codes a shared data channel (PDSCH) configured by user data (including some higher control signals) output from the data generation unit 301 for each user.
- the modulation unit 304 modulates channel-coded user data for each user.
- the mapping unit 305 maps the modulated user data to radio resources.
- the transmission system elements including the channel encoding unit 303, the modulation unit 304, and the mapping unit 305 constitute a second transmission unit that transmits a data channel including block designation information in the claims.
- the baseband signal processing unit 204 includes a downlink control information generation unit 306 that generates downlink shared data channel control information that is user-specific downlink control information, and a downlink common control channel control that is user-specific downlink control information. And a downlink common channel control information generating unit 307 that generates information.
- the downlink control information generation unit 306 constitutes a downlink control information generation unit in the claims.
- DCI downlink control information
- DCI downlink control information in which information of some or all fields in DCI is shared.
- DCI downlink control information
- some or all of the fields shared by DCI are determined based on, for example, prior settings or scheduling information from the scheduling unit 310.
- the downlink control information generation unit 306 compresses RA field information as shown in FIG.
- the downlink control information generation unit 306 performs processing such as compression of MCS field information.
- the baseband signal processing unit 204 includes a channel encoding unit 308 and a modulation unit 309 corresponding to the maximum user multiplexing number N within 1 CC.
- the channel coding unit 308 channel-codes the control information generated by the downlink control information generation unit 306 and the downlink common channel control information generation unit 307 for each user.
- Modulation section 309 modulates channel-coded downlink control information. Note that the transmission system elements including the channel coding unit 308 and the modulation unit 309 constitute a transmission unit that transmits the downlink control channel (PDCCH) in the claims.
- PDCH downlink control channel
- the baseband signal processing unit 204 includes an uplink control information generation unit 311 that generates, for each user, uplink shared data channel control information that is control information for controlling the uplink shared data channel (PUSCH), and the generated uplink A channel coding unit 312 that performs channel coding of the shared data channel control information for each user, and a modulation unit 313 that modulates the channel-coded uplink shared data channel control information for each user.
- uplink control information generation unit 311 that generates, for each user, uplink shared data channel control information that is control information for controlling the uplink shared data channel (PUSCH), and the generated uplink A channel coding unit 312 that performs channel coding of the shared data channel control information for each user, and a modulation unit 313 that modulates the channel-coded uplink shared data channel control information for each user.
- the uplink control information generation unit 311 includes uplink resource allocation information (cluster) determined for each user, MCS information and redundancy version (RV), an identifier (New data indicator) for distinguishing between new data and retransmission data, and PUSCH.
- Uplink control information is generated from a transmission power control command (TPC), a cyclic shift (CS for DMRS) of a demodulation reference signal, a CQI request, and the like.
- TPC transmission power control command
- CS for DMRS cyclic shift
- uplink allocation information of DCI format 0 is generated according to the rules defined in LTE.
- the control information modulated for each user by the modulation units 309 and 313 is multiplexed by the control channel multiplexing unit 314 and further interleaved by the interleaving unit 315.
- the control signal output from the interleaving unit 315 and the user data output from the mapping unit 305 are input to the IFFT unit 316 as downlink channel signals.
- the IFFT unit 316 converts the downlink channel signal from a frequency domain signal to a time-series signal by performing inverse fast Fourier transform.
- the cyclic prefix insertion unit 317 inserts a cyclic prefix into the time-series signal of the downlink channel signal.
- the cyclic prefix functions as a guard interval for absorbing a difference in multipath propagation delay.
- the transmission data to which the cyclic prefix is added is sent to the transmission / reception unit 203.
- FIG. 13 is a functional block diagram of the baseband signal processing unit 104 included in the mobile station 10, and shows functional blocks of an LTE-A terminal that supports LTE-A.
- the CP removal unit 401 removes the CP from the downlink signal received as received data from the base station 20.
- the downlink signal from which the CP is removed is input to the FFT unit 402.
- the FFT unit 402 performs fast Fourier transform (FFT) on the downlink signal to convert it from a time domain signal to a frequency domain signal, and inputs it to the demapping unit 403.
- the demapping unit 403 demaps the downlink signal, and extracts multiplex control information, user data, and higher control signal in which a plurality of control information is multiplexed from the downlink signal. Note that the demapping process by the demapping unit 403 is performed based on a higher control signal input from the application unit 105.
- the multiplex control information output from the demapping unit 403 is deinterleaved by the deinterleaving unit 404.
- the baseband signal processing unit 104 includes a control information demodulation unit 405 that demodulates control information, a data demodulation unit 406 that demodulates downlink shared data, and a channel estimation unit 407.
- the control information demodulator 405 is configured to control the uplink shared data channel by blindly decoding the search space from the downlink control channel and the common control channel control information demodulator 405a that demodulates the downlink common control channel control information from the downlink control channel.
- An uplink shared data channel control information demodulator 405b for demodulating information, and a downlink shared data channel control information demodulator 405c for blindly decoding the search space from the downlink control channel and demodulating the downlink shared data channel control information I have.
- the data demodulator 406 includes a downlink shared data demodulator 406a that demodulates user data and higher control signals, and a downlink shared channel data demodulator 406b that demodulates downlink shared channel data.
- the common control channel control information demodulator 405a extracts common control channel control information that is common control information for users through blind decoding processing, demodulation processing, channel decoding processing, and the like of the common search space of the downlink control channel (PDCCH). .
- the common control channel control information includes downlink channel quality information (CQI), is input to the mapping unit 115 described later, and is mapped as part of transmission data to the base station 20.
- CQI downlink channel quality information
- the uplink shared data channel control information demodulator 405b is an uplink shared data channel that is user-specific uplink allocation information by blind decoding processing, demodulation processing, channel decoding processing, etc. of the user-specific search space of the downlink control channel (PDCCH). Control information is extracted.
- the uplink allocation information is used for controlling the uplink shared data channel (PUSCH), and is input to the downlink common channel data demodulating unit 406b.
- the downlink shared data channel control information demodulator 405c is a downlink shared data channel that is user-specific downlink control information through blind decoding processing, demodulation processing, channel decoding processing, etc. of the user-specific search space of the downlink control channel (PDCCH). Control information is extracted. At this time, the downlink shared data channel control information demodulator 405c decodes the CIF added to the DCI included in the downlink control channel (PDCCH), thereby information on a plurality of CCs to which the PDSCH is assigned to the own device ( Downlink shared data channel control information) is obtained.
- the PDSCH for the own apparatus is the same and adjacent to the downlink control channel (PDCCH) It is grasped that it is assigned to CC to do.
- the downlink shared data channel control information is used to control the downlink shared data channel (PDSCH) and is input to the downlink shared data demodulation unit 406.
- the downlink shared data channel control information demodulator 405c performs a blind decoding process on the user-specific search space based on information on the PDCCH and PDSCH included in the higher control signal demodulated by the downlink shared data demodulator 406a. Do. Information related to the user-specific search space (which may include ON / OFF of activation / deactivation of PDSCH / PDCCH) is signaled by the upper control signal.
- the downlink shared data demodulator 406a acquires user data and higher control information based on the downlink shared data channel control information input from the downlink shared data channel control information demodulator 405c. Upper control information (including mode information) is output to channel estimation section 407.
- the downlink common channel data demodulator 406bc demodulates the downlink common channel data based on the uplink shared data channel control information input from the uplink shared data channel control information demodulator 405b.
- the channel estimation unit 407 performs channel estimation using the common reference signal.
- the estimated channel fluctuation is output to the common control channel control information demodulator 405a, the uplink shared data channel control information demodulator 405b, the downlink shared data channel control information demodulator 405c, and the downlink shared data demodulator 406a.
- These demodulation units demodulate the downlink allocation information using the estimated channel fluctuation and demodulation reference signal.
- the baseband signal processing unit 104 includes a data generation unit 411, a channel encoding unit 412, a modulation unit 413, a DFT unit 414, a mapping unit 415, an IFFT unit 416, and a CP insertion unit 417 as functional blocks of a transmission processing system.
- the data generation unit 411 generates transmission data from the bit data input from the application unit 105.
- the channel coding unit 412 performs channel coding processing such as error correction on the transmission data, and the modulation unit 413 modulates the channel-coded transmission data with QPSK or the like.
- the DFT unit 414 performs discrete Fourier transform on the modulated transmission data.
- Mapping section 415 maps each frequency component of the data symbol after DFT to a subcarrier position designated by the base station apparatus.
- the IFFT unit 416 performs inverse fast Fourier transform on input data corresponding to the system band to convert it into time series data, and the CP insertion unit 417 inserts a cyclic prefix into the time series data at data delimiters.
- the downlink control information generation section 306 determines a CIF to be added to the downlink control information (DCI) based on the CIF table shown in FIG.
- DCI downlink control information
- the downlink control channel (PDCCH) containing this downlink control information is transmitted to the mobile station 10 with PDSCH allocated to several CC.
- the mobile station 10 by decoding the CIF added to the DCI included in the downlink control channel (PDCCH), a plurality of CCs to which the PDSCH for the own device is assigned are grasped. Then, the transmission data from the base station 20 is reproduced by demodulating the PDSCH assigned to the plurality of CCs based on the information defined in each field included in the DCI.
- PDCH downlink control channel
- the base station 20 to which the communication control method according to the present embodiment is applied is used to demodulate a plurality of PDSCHs assigned to two or more CCs. Since the DSI to which CIF, which is identification information that can be identified, is generated and the PDCCH including this DCI is transmitted, it is not necessary to generate the DCI and transmit the PDCCH for each CC. Even in the case where a wide band is obtained by collecting together, it is possible to reduce the radio resources allocated to the PDCCH and improve the data rate.
- the present invention is used to demodulate a plurality of PDSCHs allocated to two or more CCs, and transmits a PDCCH including DCI to which a CIF that can identify the two or more CCs is added to the mobile station 10. Since the radio resources allocated to the PDCCH can be reduced, the present invention is useful for a radio communication system that performs radio communication in a system band having a wide band by gathering a plurality of CCs.
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Abstract
Description
Claims (10)
- ユーザ端末に対して割り当てられた複数の基本周波数ブロック毎に個別に送られるデータチャネルを復調するための下りリンク制御情報を生成する下り制御情報生成部と、前記下りリンク制御情報を含む下りリンク制御チャネルを送信する送信部とを具備し、
前記下り制御情報生成部は、2以上の基本周波数ブロックに割り当てられた複数のデータチャネルを復調するために用いられ、前記2以上の基本周波数ブロックを識別可能な識別情報が付加された前記下りリンク制御情報を生成することを特徴とする基地局装置。 - 前記下り制御情報生成部は、前記下りリンク制御情報に含まれる全ての情報を、前記2以上の基本周波数ブロックに割り当てられた前記複数のデータチャネルの数に関わらず共通化したことを特徴とする請求項1記載の基地局装置。
- 前記下り制御情報生成部は、前記下りリンク制御情報に含まれる一部の情報を、前記2以上の基本周波数ブロックに割り当てられた前記複数のデータチャネル毎に個別に指定したことを特徴とする請求項1記載の基地局装置。
- 前記下り制御情報生成部は、前記下りリンク制御情報に含まれるリソース割り当て情報を、前記2以上の基本周波数ブロックに割り当てられた前記複数のデータチャネル毎に個別に指定したことを特徴とする請求項3記載の基地局装置。
- 前記下り制御情報生成部は、前記リソース割り当て情報を圧縮して、前記2以上の基本周波数ブロックに割り当てられた前記複数のデータチャネル毎に個別に指定したことを特徴とする請求項4記載の基地局装置。
- 前記下り制御情報生成部は、前記ユーザ端末に対するリソース割当ての際にリソースブロックグループのサイズを、基本周波数ブロックに割り当てられたデータチャネル毎に前記下りリンク制御情報を生成する場合のリソースブロックグループのサイズよりも大きくすることで前記リソース割り当て情報を圧縮したことを特徴とする請求項5記載の基地局装置。
- 前記下り制御情報生成部は、前記複数のデータチャネルが割り当てられた前記2以上の基本周波数ブロックを識別可能な識別情報に代えて、2以上のサブフレームに割り当てられた複数のデータチャネルを復調するために用いられ、前記2以上のサブフレームを識別可能な識別情報が付加された前記下りリンク制御情報を生成することを特徴とする請求項1記載の基地局装置。
- 前記下り制御情報生成部は、前記複数のデータチャネルが割り当てられる前記2以上の基本周波数ブロックに加えて、前記複数のデータチャネルが割り当てられる2以上のサブフレームを識別可能な識別情報が付加された前記下りリンク制御情報を生成することを特徴とする請求項1記載の基地局装置。
- 前記ユーザ端末に対して割り当てられた基本周波数ブロックが一定数以上の場合に前記複数のデータチャネルが割り当てられる前記2以上の基本周波数ブロックの組合せを指定するブロック指定情報を生成するブロック指定情報生成部と、前記ブロック指定情報を含むデータチャネルを送信する第2の送信部とを更に具備することを特徴とする請求項1記載の基地局装置。
- ユーザ端末に対して割り当てられた複数の基本周波数ブロック毎に個別に送られるデータチャネルを復調するための下りリンク制御情報を生成する生成ステップと、前記下りリンク制御情報を含む下りリンク制御チャネルを送信するステップとを具備し、
前記生成ステップにて、2以上の基本周波数ブロックに割り当てられた複数のデータチャネルを復調するために用いられ、前記2以上の基本周波数ブロックを識別可能な識別情報が付加された前記下りリンク制御情報を生成することを特徴とする通信制御方法。
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Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103858398A (zh) * | 2012-08-01 | 2014-06-11 | 华为技术有限公司 | 数据解调方法与系统、以及用户设备 |
US20150139164A1 (en) * | 2012-08-10 | 2015-05-21 | Fujitsu Limited | Base station apparatus, mobile station apparatus, communication system, and communication method |
US10321386B2 (en) | 2017-01-06 | 2019-06-11 | At&T Intellectual Property I, L.P. | Facilitating an enhanced two-stage downlink control channel in a wireless communication system |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP5801694B2 (ja) * | 2011-11-09 | 2015-10-28 | 株式会社Nttドコモ | 無線通信システム、無線基地局装置、ユーザ端末及び無線通信方法 |
WO2013098984A1 (ja) * | 2011-12-28 | 2013-07-04 | 富士通株式会社 | 基地局、無線端末、無線通信システム、および無線通信方法 |
SI2816855T1 (sl) | 2012-05-09 | 2018-10-30 | Sun Patent Trust | Razporejanje med nosilci v E-PDCCH |
US9036580B2 (en) * | 2013-01-17 | 2015-05-19 | Sharp Laboratories Of America, Inc. | Systems and methods for dynamically configuring a flexible subframe |
JP6217745B2 (ja) | 2013-03-22 | 2017-10-25 | 富士通株式会社 | 無線通信システム、無線通信方法、受信装置および送信装置 |
US10356761B2 (en) | 2016-03-30 | 2019-07-16 | Qualcomm Incorporated | Techniques for configuring uplink control channel transmissions in a shared radio frequency spectrum band |
US10412627B2 (en) * | 2016-11-11 | 2019-09-10 | Qualcomm Incorporated | Signaling strategy for advanced receiver with interference cancellation and suppression |
US20190313385A1 (en) * | 2018-04-05 | 2019-10-10 | Qualcomm Incorporated | Compact dci for urllc |
US10834748B2 (en) | 2018-05-11 | 2020-11-10 | At&T Intellectual Property I, L.P. | Indication of additional information in 5G systems with legacy downlink control channel |
BR112021022295A2 (pt) * | 2019-05-09 | 2022-01-18 | Beijing Xiaomi Mobile Software Co Ltd | Método e aparelho para enviar informação de controle de enlace descendente, aparelho para informação de controle de enlace descendente, e, mídia de armazenamento legível por computador |
WO2021140677A1 (ja) * | 2020-01-10 | 2021-07-15 | 株式会社Nttドコモ | 端末及び通信方法 |
KR20210151551A (ko) * | 2020-06-05 | 2021-12-14 | 삼성전자주식회사 | 무선 통신 시스템에서 데이터 채널들을 스케줄하는 하향링크 제어 정보의 송수신 방법 및 장치 |
Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008136132A (ja) * | 2006-11-29 | 2008-06-12 | Fujitsu Ltd | 無線フレーム可変制御による最適な無線通信方法及び,これを適用する無線通信システム |
WO2009082173A2 (en) * | 2007-12-26 | 2009-07-02 | Lg Electronics Inc. | Method for transmitting and receiving signals using multi-band radio frequencies |
Family Cites Families (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DK2425669T3 (en) * | 2009-04-29 | 2018-12-10 | Koninklijke Philips Nv | PROCEDURE FOR COMMUNICATION IN A MOBILE NETWORK |
WO2011005032A2 (ko) * | 2009-07-07 | 2011-01-13 | 엘지전자 주식회사 | 다중 반송파 시스템에서 반송파 스케줄링 방법 및 장치 |
KR101641968B1 (ko) * | 2009-09-14 | 2016-07-29 | 엘지전자 주식회사 | 다중입출력 무선 통신 시스템에서 하향링크 신호 전송 방법 및 장치 |
KR101435856B1 (ko) * | 2010-02-09 | 2014-08-29 | 엘지전자 주식회사 | 무선 통신 시스템에서 상향링크 신호 송신 방법 및 이를 위한 장치 |
KR101915271B1 (ko) * | 2010-03-26 | 2018-11-06 | 삼성전자 주식회사 | 무선 통신 시스템에서 자원 할당을 위한 하향링크 제어 지시 방법 및 장치 |
SI2556617T1 (sl) * | 2010-04-08 | 2017-01-31 | Nokia Solutions And Networks Oy | Konfiguracija nosilca komponente |
-
2010
- 2010-06-21 JP JP2010141018A patent/JP5462085B2/ja not_active Expired - Fee Related
-
2011
- 2011-06-14 US US13/704,252 patent/US9591628B2/en not_active Expired - Fee Related
- 2011-06-14 WO PCT/JP2011/063605 patent/WO2011162131A1/ja active Application Filing
Patent Citations (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2008136132A (ja) * | 2006-11-29 | 2008-06-12 | Fujitsu Ltd | 無線フレーム可変制御による最適な無線通信方法及び,これを適用する無線通信システム |
WO2009082173A2 (en) * | 2007-12-26 | 2009-07-02 | Lg Electronics Inc. | Method for transmitting and receiving signals using multi-band radio frequencies |
Non-Patent Citations (1)
Title |
---|
MOTOROLA: "PDCCH Design for Cross-Carrier Operation Using CIF", 3GPP TSG RAN WG1 MEETING #59, RL-094830, November 2009 (2009-11-01) * |
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103858398A (zh) * | 2012-08-01 | 2014-06-11 | 华为技术有限公司 | 数据解调方法与系统、以及用户设备 |
EP2869519A4 (en) * | 2012-08-01 | 2015-10-07 | Huawei Tech Co Ltd | DATA MODULATION PROCESS AND SYSTEM AND USER DEVICE |
US20150139164A1 (en) * | 2012-08-10 | 2015-05-21 | Fujitsu Limited | Base station apparatus, mobile station apparatus, communication system, and communication method |
US10321386B2 (en) | 2017-01-06 | 2019-06-11 | At&T Intellectual Property I, L.P. | Facilitating an enhanced two-stage downlink control channel in a wireless communication system |
US10834664B2 (en) | 2017-01-06 | 2020-11-10 | At&T Intellectual Property I, L.P. | Facilitating an enhanced two-stage downlink control channel in a wireless communication system |
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