WO2018168189A1 - 基地局、端末及び通信方法 - Google Patents
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- WO2018168189A1 WO2018168189A1 PCT/JP2018/001516 JP2018001516W WO2018168189A1 WO 2018168189 A1 WO2018168189 A1 WO 2018168189A1 JP 2018001516 W JP2018001516 W JP 2018001516W WO 2018168189 A1 WO2018168189 A1 WO 2018168189A1
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- 238000000034 method Methods 0.000 title claims description 16
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- 230000008859 change Effects 0.000 description 4
- 238000006243 chemical reaction Methods 0.000 description 4
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- 101150071746 Pbsn gene Proteins 0.000 description 2
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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
- H04L5/0094—Indication of how sub-channels of the path are allocated
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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
- H04L5/0044—Arrangements for allocating sub-channels of the transmission path allocation of payload
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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
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0446—Resources in time domain, e.g. slots or frames
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
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- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- 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
- H04W72/232—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal the control data signalling from the physical layer, e.g. DCI signalling
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
Definitions
- the present disclosure relates to a base station, a terminal, and a communication method.
- a communication system called a 5th generation mobile communication system is being studied.
- 5G 5th generation mobile communication system
- 5G it is considered to provide functions flexibly for each use case that requires increased communication traffic, increased number of connected terminals, high reliability, and low delay.
- Typical use cases include enhanced mobile broadband (eMBB: enhanced Mobile Broadband), large-scale communication / multiple connections (mMTC: massive Type Communications), ultra-reliable and low-latency communication (URLLC: Ultra Reliable and Low Latency Communicant).
- eMBB enhanced Mobile Broadband
- mMTC massive Type Communications
- URLLC Ultra Reliable and Low Latency Communicant
- 3GPP 3rd Generation Partnership Project
- an international standardization organization is studying advanced communication systems from both the LTE system advancement and New RAT (Radio Access Technology) (see Non-Patent Document 1, for example). ing.
- New RAT it is necessary to consider a method for notifying the data area (for example, symbol position).
- One aspect of the present disclosure contributes to provision of a base station, a terminal, and a communication method that can appropriately notify a data area.
- a base station reports a circuit for selecting one pattern to be used for data allocation from among a plurality of patterns in a resource area to which data is allocated, and notifies setting information regarding the plurality of patterns by higher layer signaling And a transmitter for notifying the selected pattern by a downlink control signal (DCI).
- DCI downlink control signal
- a terminal receives upper layer signaling including setting information related to a plurality of patterns of a resource area to which data is allocated, and performs downlink control indicating one pattern used for data allocation from the plurality of patterns
- a receiver that receives a signal (DCI); and a circuit that identifies a resource to which the data is allocated based on the setting information and the downlink control signal.
- DCI signal
- a communication method selects one pattern to be used for data allocation from a plurality of patterns of resource areas to which data is allocated, and notifies setting information regarding the plurality of patterns by higher layer signaling, The selected one pattern is notified by a downlink control signal (DCI).
- DCI downlink control signal
- a communication method receives an upper layer signaling including setting information related to a plurality of patterns of resource areas to which data is allocated, and a downlink indicating one pattern used for data allocation among the plurality of patterns.
- a control signal DCI is received, and a resource to which the data is allocated is determined based on the setting information and the downlink control signal.
- FIG. 1 shows a partial configuration of a base station according to Embodiment 1.
- FIG. 2 shows a partial configuration of the terminal according to the first embodiment.
- FIG. 3 shows the configuration of the base station according to Embodiment 1.
- FIG. 4 shows the configuration of the terminal according to Embodiment 1.
- FIG. 5 shows an operation example of the base station and terminal according to Embodiment 1.
- FIG. 6A shows an example of data allocation according to operation example 1 of the first embodiment.
- FIG. 6B shows an example of data allocation according to operation example 1 of the first exemplary embodiment.
- FIG. 7 shows an example of data allocation according to the operation example 2 of the first embodiment.
- FIG. 8 shows a configuration example of the slot according to the second embodiment.
- FIG. 9A shows an example of data allocation according to the third embodiment.
- FIG. 9B shows an example of data allocation according to Embodiment 3.
- FIG. 10 shows an example of data allocation according to the fourth embodiment.
- the base station dynamically notifies the number of symbols in the PDCCH (Physical Downlink Shared Channel) area using PCFICH (Physical Control Format Indicator Channel), and data is transmitted from the next symbol in the PDCCH area.
- PCFICH Physical Control Format Indicator Channel
- the base station when changing the data start symbol in order to apply CoMP (CoordinatedordinateMultiple Point) or for interference control, it is also possible to notify the data start symbol by higher layer signaling. .
- DCI Downlink control indicator
- group common PDCCH that is assumed to be received simultaneously by a plurality of terminals (UE: User Equipment), and “UE specific DCI” that is assumed to be received individually by each terminal. It is being considered.
- the “group common control resource set” or the “UE specific control resource set”, which is an area (control resource set) where control signals such as DCI are arranged, is not the entire frequency band of the system band. Allocation to some frequency bands is under consideration. Therefore, the data area (the number of symbols that can be used for data) differs between the area where the control resource set is arranged and the area where the control resource set is not arranged.
- the terminal can recognize the UE-specific-control resource-set assigned to the own device or the group-common control-resource resource set of the group to which the own device belongs
- the UE assigned to another terminal Cannot recognize the area of specific control resource set or the region used for other purposes (for example, Sidelink, URLLC, mMTC, etc.).
- the base station can notify a resource area not to be allocated to the terminal using higher layer signaling and can perform data allocation while avoiding the resource area, but the resource area using higher layer signaling This notification will result in a semi-static assignment. Since New RAT can be used for different purposes for each slot, there is a problem that resources cannot be flexibly allocated only by notification from higher layers.
- the communication system includes a base station 100 and a terminal 200.
- FIG. 1 is a block diagram illustrating a partial configuration of the base station 100 according to the embodiment of the present disclosure.
- the DCI generating unit 102 selects one pattern to be used for data allocation from among a plurality of patterns (Modes) of the resource area to which data is allocated.
- the transmitting unit 106 notifies setting information regarding a plurality of patterns by higher layer signaling, and notifies one selected pattern by a downlink control signal (DCI).
- DCI downlink control signal
- FIG. 2 is a block diagram illustrating a partial configuration of the terminal 200 according to the embodiment of the present disclosure.
- receiving section 201 receives higher layer signaling including setting information related to a plurality of patterns (Modes) of a resource area to which data is allocated, and is used for data allocation from among the plurality of patterns.
- Downlink control information (DCI) indicating one pattern is received.
- the signal separation unit 202 identifies a resource to which data is allocated based on the setting information and the downlink control signal.
- FIG. 3 is a block diagram showing a configuration of base station 100 according to the present embodiment.
- the base station 100 includes a setting unit 101, a DCI generation unit 102, an error correction coding unit 103, a modulation unit 104, a signal allocation unit 105, a transmission unit 106, a reception unit 107, and a signal. It has a separation unit 108, a demodulation unit 109, and an error correction decoding unit 110.
- the setting unit 101 sets a plurality of patterns of resource areas to which data is allocated (hereinafter referred to as “Mode”) and parameters related to the resource areas to which data is allocated in the plurality of modes. For example, the setting unit 101 sets a frequency region (for example, PRB (Physical Resource Block)) and a time region (for example, a symbol) of resource candidates to be excluded from data allocation. Then, the setting unit 101 generates higher layer signaling (SIB (System Information Block) or dedicated Resource RRC (Radio Resource Control)) including setting information related to a plurality of modes (for example, parameters indicating the frequency domain and the time domain). To do.
- Setting section 101 outputs higher layer signaling to error correction coding section 103, and outputs setting information to DCI generation section 102, signal allocation section 105, and signal separation section 108.
- SIB System Information Block
- RRC Radio Resource Control
- the DCI generation unit 102 allocates data for the terminal 200 from a plurality of Modes set by the setting unit 101 based on information (not shown) such as a control signal amount or data amount per slot.
- information such as a control signal amount or data amount per slot.
- One Mode to be used is selected (determined), and bit information corresponding to the selected Mode is generated.
- the DCI generating unit 102 includes a DL control signal (DCI) including DL (Downlink) data signal or UL (Uplink) data signal resource allocation information (DL allocation information or UL allocation information) and bit information corresponding to the selected Mode. ) And outputs the DCI to the signal allocation unit 105. Also, the DCI generation unit 102 outputs DL allocation information to the signal allocation unit 105 in the generated DCI, and outputs UL allocation information to the signal separation unit 108.
- DCI DL control signal
- Error correction coding section 103 performs error correction coding on the transmission data signal (DL data signal) and higher layer signaling (setting information) input from setting section 101 and outputs the encoded signal to modulating section 104. To do.
- Modulation section 104 performs modulation processing on the signal received from error correction coding section 103 and outputs the modulated signal to signal allocation section 105.
- the signal allocation unit 105 Based on the DL allocation information input from the DCI generation unit 102, the signal allocation unit 105 converts the DL data signal received from the modulation unit 104, the setting information, or the DCI that is the control signal received from the DCI generation unit 102 into the downlink resource. Assign to. Specifically, the signal allocating unit 105, according to the Mode indicated by the DCI input from the DCI generating unit 102 (Mode selected by the DCI generating unit 102) among the plurality of Modes set by the setting unit 101. Allocate DL data signals to resources other than those excluded from data allocation. In this way, a transmission signal is formed. The formed transmission signal is output to transmission section 106.
- the transmission unit 106 performs radio transmission processing such as up-conversion on the transmission signal input from the signal allocation unit 105 and transmits the transmission signal to the terminal 200 via the antenna.
- the receiving unit 107 receives a signal transmitted from the terminal 200 via an antenna, performs radio reception processing such as down-conversion on the received signal, and outputs the signal to the signal separation unit 108.
- the signal separation unit 108 receives from the reception unit 107 based on the information (bit information corresponding to Mode and UL allocation information) input from the DCI generation unit 102 and the setting information input from the setting unit 101. Separate the UL data signal from the signal. Specifically, the signal separation unit 108, according to the Mode indicated by the DCI input from the DCI generation unit 102 (Mode selected by the DCI generation unit 102) among the plurality of Modes set by the setting unit 101, The resource excluded from the UL data signal allocation is identified, and the signal arranged in the resource other than the resource excluded from the data allocation is separated and output to the demodulation unit 109.
- the demodulation unit 109 performs demodulation processing on the signal input from the signal separation unit 108 and outputs the obtained signal to the error correction decoding unit 110.
- the error correction decoding unit 110 decodes the signal input from the demodulation unit 109 and obtains a reception data signal (UL data signal) from the terminal 200.
- FIG. 4 is a block diagram showing a configuration of terminal 200 according to the present embodiment.
- a terminal 200 includes a receiving unit 201, a signal separating unit 202, a DCI receiving unit 203, a demodulating unit 204, an error correction decoding unit 205, a setting information receiving unit 206, and an error correction coding unit 207.
- the reception unit 201 receives a reception signal via an antenna, performs reception processing such as down-conversion on the reception signal, and outputs the received signal to the signal separation unit 202.
- the received signal includes, for example, higher layer signaling (including setting information) or DCI (including bit information corresponding to the mode selected by the base station 100).
- the signal separation unit 202 separates a signal arranged in a resource to which a DCI may be assigned from the reception signal received from the reception unit 201, and outputs the signal to the DCI reception unit 203. Further, the signal separation unit 202 receives the information input from the DCI receiving unit 203 (bit information corresponding to the Mode selected by the base station 100 and DL allocation information) and the information input from the setting information receiving unit 206. Based on this, the resource excluded from the allocation of the DL data signal is identified, and the resource to which the DL data signal is allocated is identified. Then, the signal separation unit 202 separates the DL data signal or higher layer signaling from the received signal, and outputs the result to the demodulation unit 204.
- the DCI receiving unit 203 detects (receives) the DCI by trying to decode the signal of the resource to which the DCI input from the signal separating unit 202 may be assigned.
- DCI receiving section 203 outputs UL allocation information indicated by the received DCI to signal allocation section 209 and outputs DL allocation information to signal separation section 202.
- DCI receiving section 203 outputs bit information (Mode selected by base station 100) corresponding to the mode included in DCI to signal separating section 202.
- the demodulator 204 demodulates the signal input from the signal separator 202 and outputs the demodulated signal to the error correction decoder 205.
- the error correction decoding unit 205 decodes the demodulated signal received from the demodulating unit 204, outputs the obtained received data signal, and outputs the obtained higher layer signaling to the setting information receiving unit 206.
- the setting information receiving unit 206 based on the setting information included in the higher-layer signal output from the error correction decoding unit 205, the frequency domain and time domain of candidate resources to be excluded from data allocation in a plurality of modes related to data allocation The parameter indicating is specified. Then, the setting information reception unit 206 outputs a plurality of parameters related to Mode to the signal separation unit 202 and the signal allocation unit 209.
- the error correction coding unit 207 performs error correction coding on the transmission data signal (UL data signal), and outputs the encoded data signal to the modulation unit 208.
- Modulation section 208 modulates the data signal input from error correction coding section 207 and outputs the modulated data signal to signal allocation section 209.
- the signal allocation unit 209 includes UL allocation information input from the DCI reception unit 203, bit information corresponding to Mode (Mode selected by the base station 100), and information input from the setting information reception unit 206 (multiple information) Identify resources that are excluded from UL data allocation based on the mode parameters), and identify resources to which UL data is allocated. Then, the signal allocation unit 209 allocates the data signal input from the modulation unit 209 to the identified resource, and outputs it to the transmission unit 210.
- the transmission unit 210 performs transmission processing such as up-conversion on the signal input from the signal allocation unit 209, and transmits the signal through the antenna.
- FIG. 5 is a sequence diagram showing operations of the base station 100 and the terminal 200.
- the base station 100 sets data allocation, that is, sets a plurality of modes (patterns) in the frequency domain or time domain regarding data allocation (ST101).
- the frequency domain or time domain in each mode indicates, for example, the frequency domain and time domain of resource candidates to be excluded from data allocation.
- the base station 100 transmits setting information (parameters indicating a frequency domain or a time domain) related to the set plural modes to the terminal 200 using higher layer signaling (SIB or dedicated RRC) (ST102).
- setting information parameters indicating a frequency domain or a time domain
- SIB or dedicated RRC higher layer signaling
- base station 100 selects one Mode from the plurality of Modes set in ST101 at the time of data allocation, and identifies a resource area that can be used for data allocation based on the selected Mode (ST103). .
- the base station 100 may specify a resource area that can be used for data allocation for each PRB.
- base station 100 transmits data (DL data signal or UL data signal) allocation information and DCI including selected Mode to terminal 200 (ST104).
- data DL data signal or UL data signal
- terminal 200 identifies a resource area that can be used for data allocation based on the setting information (frequency domain and time domain) included in the higher layer signaling received in ST102 and the DCI received in ST104. (ST105). For example, the terminal 200 may specify a resource area that can be used for data allocation for each PRB. Specifically, terminal 200 selects one Mode notified by DCI from a plurality of Modes, and uses the setting information related to the selected Mode to exclude a resource area, that is, data allocation, from data allocation. Identify resource areas available for use.
- base station 100 and terminal 200 transmit and receive data (DL data signal or UL data signal) using the identified resource (ST106).
- the base station 100 when notifying the data allocation information, transmits the setting information (parameters indicating the frequency domain or the time domain) regarding a plurality of modes (patterns) of data allocation to the upper layer signaling. And one mode (pattern) used for actual data allocation is notified by DCI. That is, notification of data allocation is performed using both upper layer signaling and DCI.
- the base station 100 only needs to notify one mode (bit information) by DCI at the time of data allocation, and it is not necessary to notify the setting information regarding the frequency domain or the time domain at every data allocation. While reducing the overhead of DCI signaling, it is possible to exclude an area used other than data from the data area. Further, since the base station 100 can dynamically change the mode used for data allocation from among a plurality of modes by DCI, data can be flexibly allocated.
- the base station 100 sets, for example, “Mode 1” shown in FIG. 6A and “Mode 2” shown in FIG. 6B as the mode of data allocation. Further, the base station 100 uses, as upper layer signaling, as setting information related to Mode 1 and Mode 2, the frequency domain “X0” and start symbols “A0”, “A1”, which are symbols for starting data allocation, Notify “A2”.
- A0 is a parameter related to Mode 1
- X0, A1, and A2 are parameters related to Mode 2.
- the frequency domain X0 may be represented by a PRB number or an RBG number, for example.
- the base station 100 notifies the terminal 200 of Mode 1 or Mode 2 as the Mode used for data allocation using one bit included in the DCI.
- the terminal 200 identifies a resource area to which data is allocated based on information corresponding to the Mode indicated in the DCI among the setting information related to Mode 1 and Mode 2 notified by higher layer signaling.
- Mode 1 Data is assigned from symbol A0.
- Mode 2 In the frequency domain X0, data is allocated from the symbol A1, and in the frequency domain other than X0, data is allocated from the symbol A2.
- ⁇ X0, A0, A1, A2 ⁇ notified by the higher layer signaling as setting information may be set as follows.
- Frequency domain X0 Same frequency domain as UE specific control resource set A0: Symbol after symbol where Group common control resource set is allocated A1: Symbol after symbol where UE specific control resource set is allocated A2: Symbol # 0
- A0 indicates the start position (start symbol) in the time domain to which the DL data signal is assigned.
- X0 indicates a frequency domain to which a DL control signal (for example, UE specific DCI or the like) is allocated
- A1 indicates a start position of a time domain to which a DL data signal is allocated in the frequency domain X0
- A2 Indicates the start position in the time domain to which the DL data signal is allocated in the frequency domain other than the frequency domain X0.
- terminal 200 does not depend on the data resource to which data (PDSCH) is allocated (the resource indicated in the DL allocation information), and the start symbol (notified by higher layer signaling) Based on A0), the start position of the symbol to which data (PDSCH) is allocated is specified. That is, in Mode 1, data is allocated from symbol A0 in the entire band of the data resource.
- Mode 1 is effective when it is desired to reduce interference with the first half symbol (for example, symbol before symbol A0) in ICIC (Inter Cell Interference Coordination).
- terminal 200 is a resource to which data (PDSCH) is allocated based on the frequency domain (X0) and start symbol (A1, A2) notified by higher layer signaling. Is identified. That is, in Mode 2, the start positions of symbols to which data can be assigned differ between the frequency domain X0 and the areas other than the frequency domain X0.
- Mode 2 is effective when, for example, the data resource and the frequency domain X0 (UE specific control resource set) overlap as shown in FIG. 6B.
- data can be arranged avoiding UE specific control resource set, and in areas other than frequency domain X0, data can be arranged from symbol # 0 (A2). . Thereby, resources can be used effectively.
- the frequency domain X0 is the same frequency area as the UE specific control resource set, but the frequency domain X0 may be the same as the group common control resource set, and the UE specific control resource set. And the frequency domain combining group common control resource set.
- the frequency domain X0 is the same area as the UE-specific control-resource set or group common control-resource set, higher layer signaling can be reduced.
- the frequency domain X0 may be notified in units of PRB or RBG (Resource Block Group). If the frequency domain X0 is notified in PRB units or RBG units, the base station 100 can more flexibly instruct resources to the terminal 200. Therefore, avoid the control resource allocation area allocated to other terminals, You can avoid the area used for.
- RBG Resource Block Group
- start symbol A0 is not limited to the group common control resource set, and may be, for example, the symbol behind the most rearwardly arranged symbol in the control signal channel. Further, the start symbols A0, A1, and A2 may be symbols after the symbol in which Group common control resource set or group common control resource is arranged, and the symbol number may be notified. A0 and A2 may be the same value, and A1 and A2 may be the same value.
- two modes (Mode 1 and Mode 2) are prepared using higher layer signaling, and the mode 1 and Mode 2 are switched using one bit included in the DCI.
- four modes (Mode 1, Mode 2, Mode 3, Mode 4) are prepared by higher layer signaling, and Mode 1, Mode 2, A case where Mode 3 and Mode 4 are switched will be described.
- FIG. 7 shows an example of Mode 1, Mode 2, Mode 3, and Mode 4 according to Operation Example 2.
- the base station 100 sets, for example, Mode 1 to Mode 4 shown in FIG. Also, the base station 100 uses the higher layer signaling to set the frequency domain “X0”, “X1” and the data start symbols “A0”, “A1”, “ “A2”, “A3”, “A4”, “A5” are notified.
- A0 is a parameter related to Mode 1
- A1 is a parameter related to Mode 2
- X0, A2, and A3 are parameters related to Mode ⁇ 3
- X1, A4, and A5 are parameters related to Mode 4. is there.
- the frequency regions X0 and X1 may be represented by PRB numbers or RBG numbers, for example.
- the base station 100 notifies the terminal 200 of any one of Mode 1, Mode 2, Mode 3, or Mode 4 as the Mode used for data allocation using 2 bits included in the DCI.
- the terminal 200 identifies a resource area to which data is allocated based on information corresponding to the Mode indicated in the DCI among the setting information related to Mode 1 to Mode 4 notified by higher layer signaling.
- Mode 1 Data is assigned from symbol A0.
- Mode 2 Data is assigned from symbol A1.
- Mode 3 Data is assigned from the symbol A2 in the frequency domain X0, and data is assigned from the symbol A3 in the frequency domain other than X0.
- Mode 4 Data is assigned from the symbol A4 in the frequency domain X1, and data is assigned from the symbol A5 in the frequency domain other than X1.
- ⁇ X0, X1, A0, A1, A2, A3, A4, A5 ⁇ notified as setting information by higher layer signaling may be set as follows.
- A2 Symbol after the symbol where UE specific control resource set is placed
- A4 Symbol after symbol where Group common control resource set or UE specific control resource set is placed
- A0 indicates the start position (start symbol) in the time domain to which the DL data signal is assigned.
- A1 indicates the start position (start symbol) in the time domain to which the DL data signal is allocated.
- X0 indicates a frequency domain to which a DL control signal (for example, UE specific DCI) is allocated
- A2 indicates a start position of a time domain to which a DL data signal is allocated in the frequency domain X0
- A3 Indicates the start position in the time domain to which the DL data signal is allocated in the frequency domain other than the frequency domain X0.
- X1 indicates a frequency region to which a DL control signal (for example, UE specific DCI or group common 3 PDCCH or the like) is allocated
- A4 indicates a start position of a time region to which a DL data signal is allocated in the frequency region X1
- A5 indicates the start position in the time domain to which the DL data signal is allocated in the frequency domain other than the frequency domain X1.
- Mode 1 in FIG. 7 is the same operation as Mode 1 in Operation Example 1 (FIG. 6A). That is, in Mode 1, as shown in FIG. 7, terminal 200 does not depend on the data resource to which data (PDSCH) is allocated (the resource indicated in the DL allocation information), and the start symbol (notified by higher layer signaling) Based on A0), the start position of the symbol to which data (PDSCH) is allocated is specified. That is, in Mode 1, data is allocated from symbol A0 in the entire band of the data resource.
- Mode 2 data allocation starts from a different symbol from that of Mode 1 (symbol # 0 in FIG. 7). That is, in Mode 2, as shown in FIG. 7, data (PDSCH) is assigned from symbol # 0 regardless of data resources. Thus, since data is assigned from symbol # 0 in Mode 2, Mode 2 is effective when, for example, data is assigned to the terminal 200 in a frequency region that does not overlap control resource set.
- Mode 3 the start symbol to which data is assigned is different between the frequency domain X0 and the area other than the frequency domain X0, as in Mode 2 (FIG. 6B) of the operation example 1.
- data for terminal 200 can be arranged avoiding UE specific control resource set in frequency domain X 0, and data can be arranged from symbol # 0 in areas other than frequency domain X 0. Thereby, resources can be used effectively.
- Mode 3 in FIG. 7 is effective when data is allocated to the frequency domain overlapping with the frequency domain X0 (UE specific control resource set).
- Mode IV4 as in Mode IV3, the start symbol to which data is assigned is different in the frequency domain X1 and the area other than frequency domain X1.
- data for terminal 200 can be arranged avoiding control signals in the frequency domain X1, and data for terminal 200 can be arranged from symbol # 0 in areas other than frequency domain X1. Thereby, resources can be used effectively.
- Mode 4 in FIG. 7 is effective when data is allocated to the frequency domain overlapping with the frequency domain X1 (UE specific control resource set and group common control resource set). However, if the number of symbols in UE-specific control-resource set and group common control-resource set is different, A4 must be set according to the longer number of symbols.
- the frequency domain X0, X1 may be the same frequency area as the UE specific control resource set, or the same as the group common control resource set, and the combined frequency range of the UE specific control group and common control resource set It is good. If the frequency regions X0 and X1 are the same region as the UE-specific control-resource set or group-common control-resource set, it is possible to reduce higher layer signaling.
- the frequency domain X0, X1 may be indicated in PRB units or RBG units.
- the base station 100 can instruct resources more flexibly to the terminal 200, so avoid the frequency region of control resource set that is allocated to other mobile stations. Or avoid areas used for other purposes.
- start symbol A0 is not limited to the group common control resource set, and may be, for example, the symbol behind the most rearwardly arranged symbol in the control signal channel.
- A0, A1, A2, A3, A3, and A5 may be symbols after the symbol in which Group common control resource set or group common control resource is arranged, and may notify the symbol number.
- A0, A1, A3, and A5 may be symbol # 0.
- A0, A2, and A4 may be the same value
- A1, A3, and A5 may be the same value.
- the base station 100 uses a plurality of DL data signal (PDSCH) allocation resources (data resources) and a control signal allocation resource (control resource set) based on a relationship (for example, whether or not there is an overlap).
- PDSCH DL data signal
- control resource set a control signal allocation resource
- One mode suitable for the DL data allocation resource may be selected from the modes.
- base station 100 displays setting information (for example, X0, X1, A0, A1, A2, A3, A4, A5, etc.) related to a plurality of modes of resource areas to which data is allocated. Notification is made by layer signaling.
- the base station 100 selects one Mode to be used for data allocation from a plurality of Modes, and notifies the selected one pattern by DCI.
- the terminal 200 identifies a resource using the parameter corresponding to the Mode notified by the DCI from the setting information already notified by the higher layer signaling.
- the base station 100 can perform dynamic resource allocation in consideration of the use of different uses for each slot by notifying the terminal 200 of the mode by DCI.
- the base station 100 may notify the Mode using DCI, and notifies the resource (for example, the symbol start position of the data for each frequency domain) each time the resource allocation is changed. Since there is no need, the DCI signaling overhead can be reduced.
- the base station 100 performs flexible data allocation avoiding resource areas that are not allocated to the terminal 200 in each slot by selecting a Mode according to the resource (control resource set) in which the control signal channel is allocated. Can do.
- the group common control resource set or the UE specific ⁇ control resource set area is dynamically changed by a control signal instructing the slot configuration called group common PDCCH, the frequency domain of X0, X1, etc.
- the indicated area may be followed.
- the frequency domain such as X0 and X1 and the time domain such as A2 and A4 may be variable depending on the PDCCH detected by the terminal 200.
- X0 is the same frequency domain as the PDCCH (DL allocation or UL allocation, or both) detected by the terminal 200 in the UE-specific control-resource set
- A2 is also the time domain of the PDCCH detected by the terminal 200 Good. If it does in this way, only the resource used for PDCCH transmission will be excluded from data allocation within UE specific control control resource set, and the resource which is not used for PDCCH transmission can be used for data allocation.
- X1 is the entire Common control control resource set or the entire UE specific control control resource set, or the entire area of both, and by switching Mode 3 or Mode 4 a part of the UE specific control resource set can be used for data. You can also switch between using it for the whole and data.
- Mode Mode 3, Mode 4
- Mode Mode 1, Mode 2
- the base station 100 may set all the modes to a mode that uses the frequency domain X0 or X1, or may set all the modes to a mode that does not use the frequency domains X0 and X1.
- all modes are modes that use the frequency domain, the flexibility of data allocation is improved, and when all modes are modes that do not use the frequency domain, the operation becomes simple, especially when ICIC or CoMP is used. Suitable for assumptions.
- base station and terminal according to the present embodiment have the same basic configuration as base station 100 and terminal 200 according to Embodiment 1, and will be described with reference to FIGS.
- one slot is composed of 7 symbols. Further, it is assumed that there are three states of DL symbols, UL symbols, and symbols for other purposes as states (types) of each symbol. In this case, in order to notify all the patterns of 7 symbols in one slot, the number of bits for notifying 3 7 (2187) ways is required, and if all the information is notified by DCI, the overhead increases. There is a problem.
- base station 100 uses upper layer signaling (SIB or dedicated RRC), and in a slot configured by DL symbols, UL symbols, or symbols used for other purposes.
- SIB upper layer signaling
- the setting information indicating a plurality of patterns of the symbol configuration or the frequency band configuration is notified.
- the base station 100 selects one pattern from a plurality of patterns, and identifies a resource region (for example, symbol, PRB unit) that can be used for data allocation based on the selected pattern. Also, the base station notifies the terminal 200 of the selected pattern by DCI.
- SIB upper layer signaling
- terminal 200 receives a plurality of patterns indicating a symbol configuration or a frequency band configuration in a slot by higher layer signaling. Then, terminal 200 selects one pattern notified by DCI from among a plurality of patterns, and identifies a resource area (for example, symbol or PRB unit) that can be used for data allocation.
- a resource area for example, symbol or PRB unit
- the base station 100 may notify one pattern indicating a symbol configuration or a frequency band by DCI at the time of data allocation, and a resource used as a data domain in the time domain or the frequency domain every time data allocation is performed. Therefore, DCI signaling overhead can be reduced. Further, since the base station 100 can dynamically change the resource configuration in the slot by DCI, data can be flexibly allocated.
- the base station 100 notifies the configuration of DL symbols, UL symbols, and symbols used for other purposes in one slot or in a plurality of slots using higher layer signaling. In the following, the number of symbols in the slot is 7.
- the base station 100 selects four patterns from the following patterns (a) to (g) as an example of higher layer signaling.
- Notification per slot (A) All 7 symbols are DL symbols (b) 6 symbols are DL symbols, 1 symbol is UL symbol (mainly used for DL data transmission, UL is used for control signal transmission) (C) 5 symbols are DL symbols, 2 symbols are UL symbols (mainly used for DL data transmission, UL is used for control signal transmission) (D) 2 symbols are DL symbols, 5 symbols are UL symbols (Mainly used for UL data transmission, DL is used for control signal transmission) (E) 1 symbol is a DL symbol, 6 symbols are UL symbols (mainly used for UL data transmission, DL is used for control signal transmission) (F) 4 symbols are DL symbols, 3 symbols are symbols used for other purposes (the first half is used for DL data transmission, the second half is a minislot or Sidelink) (G) 1 symbol is a DL symbol, 6 symbols are used for other purposes (mainly used for other data transmission, DL is used for control signal transmission)
- the base station 100 may notify a combination of a plurality of patterns (a) to (g) for each slot as a pattern of a plurality of slots.
- the terminal 200 may monitor the DCI every two slots.
- the base station 100 selects four patterns from the patterns (a) to (i). May be.
- All 7 symbols are UL symbols
- All 7 symbols are symbols used for other purposes
- a pattern with a longer cycle may be notified using higher layer signaling.
- the long cycle may include, for example, a notification equivalent to DL, UL, and special subframe in subframe (1 msec) units notified as LTE / DL configuration.
- the notification equivalent to LTE has an effect of reducing the influence of interference on other cells when a New RAT base station and an LTE base station exist in the same frequency band.
- base station 100 uses two bits included in DCI.
- a pattern to be used for actual data allocation is notified to terminal 200 for each slot or for each of a plurality of slots.
- the DCI including the selected pattern may be transmitted using, for example, group common PDCCH or UE specific DCI.
- the base station 100 notifies the terminal 200 of patterns for 4 slots using the DCI as patterns (a), (c), (e), and (f) for each slot,
- the assignment is as shown in FIG.
- the terminal 200 identifies DL symbols, UL symbols, and symbols used for other purposes in the slot based on the pattern notified by DCI. Then, the terminal 200 determines DL data, a control signal, a reference signal (CSI-RS (Channel Information Reference signal), (DMRS (Demodulation reference signal), CRS (cell specific Reference)) depending on the position (configuration) of the identified DL symbol. signal), PT-RS (Phase Tracking Reference Reference Signal)) can be recognized, and the terminal 200 determines the UL data, UL control signal (ACK / NACK, CSI) according to the position of the specified UL symbol. (Channel ⁇ State Information), SR (Scheduling Request)), and a reference signal (DMRS, SRS (Sounding Signal Signal))) can be recognized by which symbol.
- CSI-RS Channel Information Reference signal
- DMRS Demodulation reference signal
- CRS cell specific Reference
- PT-RS Phase Tracking Reference Reference Signal
- the symbol configuration in the slot is not limited to the patterns (a) to (i) described above, and the number of patterns notified by higher layer signaling is not limited to four, and may be other than four.
- the base station 100 notifies setting information related to a plurality of patterns (Modes) of the DL and UL frequency domain configurations in one slot or in a plurality of slots, using higher layer signaling.
- the frequency domain may be represented by a PRB number or an RBG number, for example.
- the base station 100 uses the higher layer signaling to transmit the DL frequency regions X0, X1, X2, X3 and UL frequency regions Y0, Notify Y1, Y2, Y3.
- Mode 1 DL frequency band X0, UL frequency band Y0
- Mode 2 DL frequency band X1, UL frequency band Y1
- Mode 3 DL frequency band X2, UL frequency band Y2
- Mode 4 DL frequency band X3, UL frequency band Y3
- the base station 100 notifies the terminal 200 of any one of Modes 1 to 4 as the Mode used for data allocation using the 2-bit DCI.
- the terminal 200 receives the higher layer signaling and recognizes the DL frequency regions X0, X1, X2, X3 and the UL frequency regions Y0, Y1, Y2, Y3 of Mode 1-4.
- Terminal 200 receives the DCI and identifies a frequency region in one slot or a plurality of slots.
- the terminal 200 can know the arrangement of the DL CSI-RS or the RS to be measured for mobility, and can use the RS in the area where no data is allocated. In addition, terminal 200 knows in UL the frequency band for transmitting ACK / NACK, CSI, SR or the band for transmitting SRS.
- the RBG (PRB unit, 2PRB unit, 3PRB unit, 4PRB unit), which is the granularity of DL data or UL data allocation, may be changed depending on the frequency bandwidth used.
- the DL frequency band and the UL frequency band are separately notified.
- the DL and UL may be notified of a common band.
- other frequency bands may be additionally notified.
- operation example 1 and the operation example 2 may be combined to notify the symbols and frequency regions in one slot or in a plurality of slots by signaling of higher layers.
- the base station 100 configures the setting information (for example, part of the above (a) to (i), a plurality of patterns (Mode) indicating the configuration of the resource area in the slot, Alternatively, X0, X1, X2, X3, Y0, Y1, Y2, Y3, etc.) are notified by higher layer signaling. Also, the base station 100 selects one pattern (Mode) used for data allocation from among a plurality of patterns (Mode), and notifies the selected one pattern by DCI. The terminal 200 specifies a resource by using a parameter corresponding to a pattern (Mode) notified by DCI from the setting information already notified by higher layer signaling.
- the base station 100 can perform dynamic resource allocation in consideration of the use of different applications for each slot by notifying the terminal 200 of the pattern (Mode) by DCI. Further, when changing the configuration in the slot, the base station 100 may notify the pattern (Mode) using DCI, and the resource (for example, the symbol position or frequency of the data in the slot) every time the resource allocation is changed. DCI signaling overhead can be reduced.
- the base station and terminal according to the present embodiment have the same basic configuration as base station 100 and terminal 200 according to Embodiment 1, and will be described with reference to FIGS.
- a control resource set set at the beginning of a slot is assumed as an area to which data is not allocated, whereas in this embodiment, a signal (for example, URLCC) inserted in the slot is assumed. Signal) is assumed.
- the URLLC signal is transmitted / received in a mini-slot composed of fewer symbols than the symbols composing the slot in which other signals are transmitted / received. That is, the minislot uses a part of the slot. Therefore, the area not used for the minislot can be used for transmission / reception of other signals. Therefore, it is conceivable to notify the area used for the minislot for each slot.
- the base station 100 notifies the terminal 200 to which resources are allocated in slot units, using the higher layer signaling, the frequency region X0 and the symbol number Y0 that may be occupied by the minislot.
- the frequency domain is represented by, for example, a PRB number or an RBG number.
- the base station 100 notifies Mode 1 or Mode 2, which will be described later, as a Mode used for data allocation using one bit included in the DCI.
- the terminal 200 identifies a resource area to which data is assigned based on the setting information (X0, Y0) notified by higher layer signaling and the Mode 1 or Mode 2 indicated in the DCI.
- Mode 1 Data is arranged in an area where data is assigned to terminal 200 assigned in slot units (see, for example, FIG. 9A).
- Mode 2 No data is arranged in the symbol number Y0 of the frequency domain X0 among the areas where data is allocated to the terminal 200 allocated in slot units (see, for example, FIG. 9B).
- ⁇ X0, Y0 ⁇ notified by higher layer signaling may be set as follows. Frequency domain X0: PRB # 2 to PRB # 5 Time domain Y0: Symbol # 3, # 4, # 5
- the frequency domain X0 and the time domain Y0 included in the setting information notified by higher layer signaling indicate some resource areas that the slot may occupy in the slot.
- the Mode notified by the DCI includes Mode 1 that does not allocate data to some resource areas corresponding to the mini-slot, and Mode 2 that assigns data to some resource areas corresponding to the mini-slot. included.
- the base station 100 selects the mode for the terminal 200 according to the resource allocation status of the terminal 200 to which resources are allocated in slot units and other terminals to which resources are allocated in mini-slot units, and is selected by DCI. Notify the changed mode.
- Mode 2 there may be other terminals that use the minislot, so that it is possible to arrange data for the terminal 200 while avoiding the area that may be used for the minislot. it can.
- the base station 100 displays the setting information (for example, the above-described X0, Y0, etc.) related to a part of the resource area in the slot (area that may be occupied by the minislot). Notification is made by layer signaling.
- the base station 100 selects one Mode to be used for data allocation from a plurality of Modes, and notifies the selected one pattern by DCI.
- the terminal 200 identifies the resource allocated to the terminal 200 based on the setting information already notified by higher layer signaling and the Mode notified by DCI.
- the base station 100 can perform dynamic resource allocation in consideration of the use of different uses for each slot by notifying the terminal 200 of the mode by DCI. Further, when changing the allocation of the data area in the slot, the base station 100 may notify the Mode using the DCI, and the resource (for example, a resource occupied by the minislot) every time the resource allocation is changed. Therefore, DCI signaling overhead can be reduced.
- the number of modes is not limited to two, and may be three or more modes.
- a plurality of resources used as minislots can be notified, and the size of the minislot area can be changed.
- the frequency region X0 and the time region Y0 that specify resources that may be used as minislots are not limited to continuous regions, and non-contiguous regions may be specified.
- the signal inserted into the slot is assumed to be a URLLC signal, but it may be a signal for other purposes.
- it may be used for insertion of reference signals such as CSI-RS or Sidelink used for D2D, or for avoiding transmission for the purpose of interference control.
- the terminal can recognize the ACK / NACK, CSI, SR, and SRS areas assigned to itself, while the area assigned to other terminals or other uses (for example, Sidelink, Cannot recognize the area used for (URLLC, mMTC).
- the base station can notify the resource area that is not allocated to the terminal using higher layer signaling and can perform data allocation while avoiding the resource area, but the higher layer signaling is used. In the notification of the resource area, it becomes a semi-static allocation. Since New RAT can be used for different purposes for each slot, there is a problem that the flexibility of resource allocation is low only by notification from higher layers.
- an area that can be used for UL data is notified by combining upper layer signaling and DCI.
- the base station and the terminal according to the present embodiment have the same basic configuration as the base station 100 and the terminal 200 according to the first embodiment, description will be made with reference to FIGS.
- the base station 100 sets a plurality of modes (patterns) in the frequency domain or time domain regarding data allocation. Also, the base station 100 transmits setting information (parameters indicating frequency domain or time domain) related to the set plural modes to the terminal 200 using higher layer signaling (SIB or dedicated RRC).
- SIB higher layer signaling
- the base station 100 selects one Mode from a plurality of Modes, and identifies a resource area that can be used for UL data allocation based on the selected Mode, for example, for each PRB. Base station 100 then transmits DCI including data allocation information and the selected Mode to terminal 200.
- the terminal 200 identifies a resource area (for example, a PRB unit) that can be used for UL data allocation based on the received setting information included in higher layer signaling and DCI.
- a resource area for example, a PRB unit
- base station 100 when notifying UL data allocation information, notifies setting information related to a plurality of modes of UL data allocation by higher layer signaling and uses it for actual UL data allocation.
- One mode is notified by DCI. That is, UL data allocation is notified by using upper layer signaling and DCI together.
- Embodiment 1 (DL allocation)
- base station 100 only needs to notify one mode by DCI at the time of data allocation, and the setting information related to the frequency domain or the time domain is provided for each data allocation. Since there is no need to notify, it is possible to eliminate an area used other than data from the data area while reducing the overhead of DCI signaling. Further, since the base station 100 can dynamically change the mode used for data allocation from among a plurality of modes by DCI, data can be flexibly allocated.
- Mode 1, Mode 2, Mode 3, Mode 4 are prepared by higher layer signaling, and using the two bits included in the DCI, the Mode is used. A case of switching between 1, Mode 2, Mode 3, and Mode 4 will be described.
- FIG. 10 shows an example of Mode 1, Mode 2, Mode 3, and Mode 4 according to this operation example.
- the base station 100 sets, for example, Mode 1 to Mode 4 shown in FIG. Further, the base station 100 uses the higher layer signaling as the setting information related to Mode 1 to Mode 4 and the frequency domain “X0”, “X1” and the data end symbols “A0”, “A1”, “ “A2”, “A3”, “A4”, “A5” are notified.
- A0 is a parameter related to Mode 1
- A1 is a parameter related to Mode 2
- X0, A2, and A3 are parameters related to Mode ⁇ 3
- X1, A4, and A5 are parameters related to Mode 4. is there.
- the frequency regions X0 and X1 may be represented by PRB numbers or RBG numbers, for example.
- the base station 100 notifies the terminal 200 of any one of Mode 1, Mode 2, Mode 3, or Mode 4 as the Mode used for data allocation using 2 bits included in the DCI.
- the terminal 200 identifies a resource area to which data is allocated based on information corresponding to the Mode indicated in the DCI among the setting information related to Mode 1 to Mode 4 notified by higher layer signaling.
- Mode 1 Data is assigned up to symbol A0.
- Mode 2 Data is assigned up to symbol A1.
- Mode 3 Data is assigned up to symbol A2 in the frequency domain X0, and data is assigned up to symbol A3 in the frequency domain other than X0.
- Mode 4 Data is assigned up to symbol A4 in the frequency domain X1, and data is assigned up to symbol A5 in the frequency domain other than X1.
- ⁇ X0, X1, A0, A1, A2, A3, A4, A5 ⁇ notified as setting information by higher layer signaling may be set as follows.
- A2 Symbol before the symbol where ACK / NACK is placed
- A4 Symbol before ACK / NACK or CSI
- A0 indicates the end position of the time domain to which the UL data signal is assigned.
- Mode IV2 indicates the end position of the time domain to which the UL data signal is assigned.
- X0 indicates a frequency domain to which a UL control signal (eg, ACK / NACK) is allocated
- A2 indicates a time domain end position to which a UL data signal is allocated in frequency domain X0
- A3 Indicates the end position of the time domain to which the UL data signal is allocated in the frequency domain other than the frequency domain X0.
- X1 indicates a frequency domain to which a UL control signal (for example, ACK / NACK, CSI, etc.) is allocated
- A4 indicates a time domain end position to which a UL data signal is allocated in the frequency domain X1.
- A5 indicates the end position of the time domain to which the UL data signal is allocated in the frequency domain other than the frequency domain X1.
- terminal 200 does not depend on the data resource to which data (PUSCH) is allocated (the resource indicated in the UL allocation information), and the end symbol (notified by higher layer signaling) ( Based on A0), the end position of the symbol to which the data (PUSCH) is allocated is specified. That is, in Mode 1, data is assigned up to symbol A0 in the entire band of the data resource.
- Mode 2 data is allocated up to symbols different from Mode 1 (the last symbol in the slot in FIG. 10). That is, in Mode 2, as shown in FIG. 10, data (PUSCH) is allocated up to the last symbol of the slot regardless of the data resource.
- Mode 2 is used when, for example, data is allocated to the terminal 200 in a frequency region that does not overlap with the UL control signal or the reference signal. It is valid.
- Mode IV3 the end symbol to which data is assigned is different between the frequency domain X0 and the areas other than the frequency domain X0.
- terminal 200 can arrange data avoiding ACK / NACK (final symbol of slot) in frequency domain X0, and can arrange data up to the final symbol of slot in areas other than frequency domain X0. Thereby, resources can be used effectively.
- Mode 3 is effective when data is assigned to the frequency domain overlapping with the frequency domain X0 (ACK / NACK).
- Mode IV4 as in Mode IV3, the end symbol to which data is assigned differs between the frequency domain X1 and the area other than the frequency domain X1.
- terminal 200 can arrange data avoiding control signals (ACK / NACK and CSI) in frequency domain X1, and can arrange data up to the last symbol of the slot in areas other than frequency domain X1. Thereby, resources can be used effectively.
- Mode 4 is effective when data is allocated to the frequency domain overlapping with the frequency domain X1 (ACK / NACK and CSI). However, if the number of ACK / NACK and CSI symbols is different, A4 needs to be set according to the longer number of symbols.
- the base station 100 is based on the relationship (for example, the presence or absence of overlap) between the allocation resource (data resource) of the UL data signal (PUSCH) and the allocation resource of the control signal (ACK / NACK, CSI, etc.).
- One mode suitable for the UL data allocation resource may be selected from a plurality of modes.
- the frequency regions X0 and X1 may be the same frequency region as ACK / NACK, CSI, SRS, or SR, or a combined frequency region.
- the frequency domain X0, X1 may be indicated in PRB units or RBG units.
- the base station 100 can instruct resources more flexibly to the terminal 200, so that control signals, reference signals or data assigned to other mobile stations can be indicated.
- the frequency domain can be avoided, and the area used for other purposes can be avoided.
- A0, A1, A2, A3, A3, and A5 may be symbols before the symbol in which ACK / NACK, CSI, SRS, or SR is arranged, and may report a symbol number.
- A0, A1, A3, and A5 may be the final symbols of slots or subframes.
- A0, A2, and A4 may be the same value, and A1, A3, and A5 may be the same value.
- base station 100 displays setting information (for example, X0, X1, A0, A1, A2, A3, A4, A5, etc.) related to a plurality of modes of resource areas to which data is allocated. Notification is made by layer signaling.
- the base station 100 selects one Mode to be used for data allocation from a plurality of Modes, and notifies the selected one pattern by DCI.
- the terminal 200 identifies a resource using the parameter corresponding to the Mode notified by the DCI from the setting information already notified by the higher layer signaling.
- the base station 100 can perform dynamic resource allocation in consideration of the use of different uses for each slot by notifying the terminal 200 of the mode by DCI.
- the base station 100 may notify the Mode using DCI, and notifies the resource (for example, the symbol start position of the data for each frequency domain) each time the resource allocation is changed. Since there is no need, the DCI signaling overhead can be reduced.
- the base station 100 performs flexible data allocation avoiding resource areas that are not allocated to the terminal 200 in each slot by selecting a Mode according to the resource (control resource set) in which the control signal channel is allocated. Can do.
- Mode is notified using 1 bit or 2 bits included in DCI.
- the present invention is not limited to this, and more bits than 2 bits included in DCI are used. Mode may be notified. Further, the number of Modes is not limited to 2 or 4, but may be other numbers.
- the physical mapping has been described as an example for the frequency domain (PRB #), but it can also be applied to logical mapping.
- PRB # frequency domain
- logical mapping since the logical mapping is changed to the physical mapping, even if the frequency domain is continuous in the logical mapping, it is physically located at a distant position. A frequency diversity effect can be obtained.
- the DCI may be transmitted on a group-common-PDCCH, a PDCCH (UE-specific DCI) transmitted at the time of data allocation of the terminal 200 (UE), or another PDCCH transmitted on a group-common-control-resource-set.
- a group-common-PDCCH a PDCCH (UE-specific DCI) transmitted at the time of data allocation of the terminal 200 (UE), or another PDCCH transmitted on a group-common-control-resource-set.
- the overhead can be reduced because multiple terminals receive the same setting.
- DCI when DCI is transmitted on an individual PDCCH, it can be set individually for each terminal.
- the DCI is not limited to group common resource set and UE specific control resource set, but may be transmitted by other resources.
- group common PDCCH may be defined with a different name such as PCFICH (Physical Control Format Indicator Channel), PSFICH (Physical Slot Format Indicator Channel), or PDCCH type 0.
- PCFICH Physical Control Format Indicator Channel
- PSFICH Physical Slot Format Indicator Channel
- PDCCH type PDCCH type 0.
- group common control resource set may be called common control resource set, group common search space, or common search space.
- control resource set is sometimes called CORESET.
- higher layer signaling may be replaced with MAC signaling.
- MAC signaling the mode change frequency set in the UE can be increased compared to RRC signaling.
- Each functional block used in the description of the above embodiment is partially or entirely realized as an LSI that is an integrated circuit, and each process described in the above embodiment may be partially or entirely performed. It may be controlled by one LSI or a combination of LSIs.
- the LSI may be composed of individual chips, or may be composed of one chip so as to include a part or all of the functional blocks.
- the LSI may include data input and output.
- An LSI may be referred to as an IC, a system LSI, a super LSI, or an ultra LSI depending on the degree of integration.
- the method of circuit integration is not limited to LSI, and may be realized by a dedicated circuit, a general-purpose processor, or a dedicated processor.
- an FPGA Field Programmable Gate Array
- a reconfigurable processor that can reconfigure the connection and setting of circuit cells inside the LSI may be used.
- the present disclosure may be implemented as digital processing or analog processing.
- integrated circuit technology comes out to replace LSI's as a result of the advancement of semiconductor technology or a derivative other technology, it is naturally also possible to carry out function block integration using this technology. Biotechnology can be applied.
- the base station reports a circuit for selecting one pattern to be used for data allocation from among a plurality of patterns of resource areas to which data is allocated, and notification of setting information regarding the plurality of patterns by upper layer signaling, and the selection And a transmitter for notifying one of these patterns by a downlink control signal (DCI).
- DCI downlink control signal
- the setting information indicates a start position in the time domain to which the downlink data is allocated.
- the setting information includes a frequency domain to which a downlink control signal is allocated, a start position in a time domain to which the downlink data is allocated in the frequency domain, and a frequency domain other than the frequency domain. Indicates the start position of the time domain to which the downlink data is allocated.
- the setting information indicates a plurality of patterns of symbol configurations in slots configured by downlink symbols, uplink symbols, or symbols used for other purposes.
- the setting information indicates a plurality of patterns of frequency band configurations used for downlink, uplink, or other applications in the slot.
- the setting information indicates a part of a resource area in a slot
- the plurality of patterns include a pattern for assigning the data to the part of the resource area, and the part of the resource area. Includes a pattern that does not allocate the data.
- the setting information indicates an end position in the time domain to which the uplink data is allocated.
- the setting information includes a frequency domain to which an uplink control signal is allocated, a time domain end position to which the uplink data is allocated in the frequency domain, and a frequency domain other than the frequency domain. 2 indicates the end position of the time domain to which the uplink data is allocated.
- the terminal of the present disclosure receives upper layer signaling including setting information regarding a plurality of patterns of resource areas to which data is allocated, and a downlink control signal (DCI) indicating one pattern used for data allocation among the plurality of patterns And a circuit for specifying a resource to which the data is allocated based on the setting information and the downlink control signal.
- DCI downlink control signal
- the communication method of the present disclosure selects one pattern to be used for data allocation from among a plurality of patterns of resource areas to which data is allocated, notifies setting information regarding the plurality of patterns by higher layer signaling, and selects the selected One pattern is notified by a downlink control signal (DCI).
- DCI downlink control signal
- the communication method of the present disclosure receives higher layer signaling including setting information related to a plurality of patterns of resource areas to which data is allocated, and a downlink control signal (DCI) indicating one pattern used for data allocation among the plurality of patterns. ) And resources to which the data is allocated are determined based on the setting information and the downlink control signal.
- DCI downlink control signal
- One embodiment of the present disclosure is useful for a mobile communication system.
- DESCRIPTION OF SYMBOLS 100 Base station 101 Setting part 102 DCI production
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Abstract
Description
本開示の各実施の形態に係る通信システムは、基地局100及び端末200を備える。
[基地局の構成]
図3は、本実施の形態に係る基地局100の構成を示すブロック図である。図3において、基地局100は、設定部101と、DCI生成部102と、誤り訂正符号化部103と、変調部104と、信号割当部105と、送信部106と、受信部107と、信号分離部108と、復調部109と、誤り訂正復号部110とを有する。
図4は、本実施の形態に係る端末200の構成を示すブロック図である。図4において、端末200は、受信部201と、信号分離部202と、DCI受信部203と、復調部204と、誤り訂正復号部205と、設定情報受信部206と、誤り訂正符号化部207と、変調部208と、信号割当部209と、送信部210と、を有する。
以上の構成を有する基地局100及び端末200における動作について詳細に説明する。
基地局100は、データ割当のModeとして、例えば、図6Aに示す「Mode 1」及び図6Bに示す「Mode 2」を設定する。また、基地局100は、上位レイヤのシグナリングを用いて、Mode 1及びMode 2に関する設定情報として、周波数領域「X0」及びデータの割り当てを開始するシンボルであるスタートシンボル「A0」、「A1」、「A2」を通知する。ここで、後述するように、A0はMode 1に関するパラメータであり、X0、A1、A2はMode 2に関するパラメータである。周波数領域X0は、例えば、PRB番号又はRBG番号で表されてもよい。
Mode 1:データはシンボルA0から割り当てられる。
Mode 2:周波数領域X0では、データはシンボルA1から割り当てられ、X0以外の周波数領域では、データはシンボルA2から割り当てられる。
周波数領域X0:UE specific control resource setと同一周波数領域
A0:Group common control resource setが配置されるシンボルの後ろのシンボル
A1:UE specific control resource setが配置されるシンボルの後ろのシンボル
A2:シンボル#0
動作例1では、上位レイヤのシグナリングを用いて2つのMode(Mode 1とMode 2)を用意し、DCIに含まれる1ビットを用いてMode 1とMode 2とを切り替える場合について説明した。これに対して、動作例2では、上位レイヤのシグナリングで4つのMode(Mode 1、Mode 2、Mode 3、Mode 4)を用意し、DCIに含まれる2ビットを用いてMode 1、Mode 2、Mode 3、Mode 4を切り替える場合について説明する。
Mode 1:データはシンボルA0から割り当てられる。
Mode 2:データはシンボルA1から割り当てられる。
Mode 3:周波数領域X0では、データはシンボルA2から割り当てられ、X0以外の周波数領域では、データはシンボルA3から割り当てられる。
Mode 4:周波数領域X1では、データはシンボルA4から割り当てられ、X1以外の周波数領域では、データはシンボルA5から割り当てられる。
周波数領域X0:UE specific control resource setと同一周波数領域
周波数領域X1:UE specific control resource setとGroup common control resource setとを合わせた周波数領域
A0:Group common control resource setが配置されるシンボルの後ろのシンボル
A1:シンボル#0
A2:UE specific control resource setが配置されるシンボルの後ろのシンボル
A3:シンボル#0
A4:Group common control resource set又はUE specific control resource setが配置されるシンボルの後ろのシンボル
A5:シンボル#0
実施の形態1では、時間領域においてデータの開始位置(スタートシンボル)を通知する場合について説明したのに対して、本実施の形態では、時間領域又は周波数領域においてデータ領域として使用されるシンボル(例えば、シンボル番号)又は周波数帯域(例えば、PRB)を通知する場合について説明する。
動作例1ではスロット内のシンボルを通知する動作について説明する。
(a)7シンボル全てがDLシンボル
(b)6シンボルがDLシンボル、1シンボルがULシンボル
(主にDLのデータ送信に使用、ULは制御信号の送信に使用)
(c)5シンボルがDLシンボル、2シンボルがULシンボル
(主にDLのデータ送信に使用、ULは制御信号の送信に使用)
(d)2シンボルがDLシンボル、5シンボルがULシンボル
(主にULのデータ送信に使用、DLは制御信号の送信に使用)
(e)1シンボルがDLシンボル、6シンボルがULシンボル
(主にULのデータ送信に使用、DLは制御信号の送信に使用)
(f)4シンボルがDLシンボル、3シンボルがその他の用途に使用されるシンボル
(前半をDLのデータ送信に使用、後半をミニスロット又はSidelink)
(g)1シンボルがDLシンボル、6シンボルがその他の用途に使用されるシンボル
(主にその他のデータの送信に使用、DLは制御信号の送信に使用)
基地局100は、複数のスロットのパターンとして、上記1スロット毎のパターン(a)~(g)を複数個組み合わせて通知してもよい。
(h)7シンボル全てがULシンボル
(i)7シンボル全てがその他の用途に使用されるシンボル
動作例2ではスロット内の周波数領域を通知する動作について説明する。
Mode 1: DL 周波数帯 X0, UL周波数帯Y0
Mode 2: DL 周波数帯 X1, UL周波数帯Y1
Mode 3: DL 周波数帯 X2, UL周波数帯Y2
Mode 4: DL 周波数帯 X3, UL周波数帯Y3
本実施の形態に係る基地局及び端末は、実施の形態1に係る基地局100及び端末200と基本構成が共通するので、図3及び図4を援用して説明する。
Mode 1:スロット単位で割り当てられた端末200に対してデータを割り当てられた領域にデータが配置される(例えば、図9Aを参照)。
Mode 2:スロット単位で割り当てられた端末200に対してデータを割り当てられた領域のうち、周波数領域X0のシンボル番号Y0には、データが配置されない(例えば、図9Bを参照)。
周波数領域X0:PRB#2~PRB#5
時間領域Y0:シンボル#3,#4,#5
実施の形態1では、主にDLのデータ(PDSCH)の割り当てを想定したのに対して、本実施の形態ではULのデータ(PUSCH:Physical Uplink Shared Channel)の割り当てを想定する場合について説明する。
Mode 1:データはシンボルA0まで割り当てられる。
Mode 2:データはシンボルA1まで割り当てられる。
Mode 3:周波数領域X0では、データはシンボルA2まで割り当てられ、X0以外の周波数領域では、データはシンボルA3まで割り当てられる。
Mode 4:周波数領域X1では、データはシンボルA4まで割り当てられ、X1以外の周波数領域では、データはシンボルA5まで割り当てられる。
周波数領域X0:ACK/NACKと同一周波数領域
周波数領域X1:ACK/NACKとCSIとを合わせた周波数領域
A0:ACK/NACK、CSI、SRSが配置されるシンボルの前のシンボル
A1:スロットの最終シンボル
A2:ACK/NACKが配置されるシンボルの前のシンボル
A3:スロットの最終シンボル
A4:ACK/NACK又はCSIの前のシンボル
A5:スロットの最終シンボル
101 設定部
102 DCI生成部
103,207 誤り訂正符号化部
104,208 変調部
105,209 信号割当部
106,210 送信部
107,201 受信部
108,202 信号分離部
109,204 復調部
110,205 誤り訂正復号部
200 端末
203 DCI受信部
206 設定情報受信部
Claims (11)
- データを割り当てるリソース領域の複数のパターンの中からデータ割当に使用する1つのパターンを選択する回路と、
前記複数のパターンに関する設定情報を上位レイヤシグナリングによって通知し、前記選択された1つのパターンを下り制御信号(DCI)によって通知する送信機と、
を具備する基地局。 - 前記設定情報は、下りリンクの前記データが割り当てられる時間領域の開始位置を示す、
請求項1に記載の基地局。 - 前記設定情報は、下りリンクの制御信号が割り当てられる周波数領域、当該周波数領域において下りリンクの前記データが割り当てられる時間領域の開始位置、及び、当該周波数領域以外の周波数領域において下りリンクの前記データが割り当てられる時間領域の開始位置を示す、
請求項1に記載の基地局。 - 前記設定情報は、下りリンクシンボル、上りリンクシンボル又は他の用途に使用されるシンボルによって構成されるスロット内のシンボル構成の複数のパターンを示す、
請求項1に記載の基地局。 - 前記設定情報は、スロット内における、下りリンク、上りリンク又は他の用途に使用される周波数帯の構成の複数のパターンを示す、
請求項1に記載の基地局。 - 前記設定情報は、スロット内の一部のリソース領域を示し、
前記複数のパターンは、前記一部のリソース領域に前記データを割り当てるパターン、及び、前記一部のリソース領域に前記データを割り当てないパターンを含む、
請求項1に記載の基地局。 - 前記設定情報は、上りリンクの前記データが割り当てられる時間領域の終了位置を示す、
請求項1に記載の基地局。 - 前記設定情報は、上りリンクの制御信号が割り当てられる周波数領域、当該周波数領域において上りリンクの前記データが割り当てられる時間領域の終了位置、及び、当該周波数領域以外の周波数領域において上りリンクの前記データが割り当てられる時間領域の終了位置を示す、
請求項1に記載の基地局。 - データを割り当てるリソース領域の複数のパターンに関する設定情報を含む上位レイヤシグナリングを受信し、前記複数のパターンの中からデータ割当に使用する1つのパターンを示す下り制御信号(DCI)を受信する受信機と、
前記設定情報及び前記下り制御信号に基づいて、前記データが割り当てられるリソースを特定する回路と、
を具備する端末。 - データを割り当てるリソース領域の複数のパターンの中からデータ割当に使用する1つのパターンを選択し、
前記複数のパターンに関する設定情報を上位レイヤシグナリングによって通知し、前記選択された1つのパターンを下り制御信号(DCI)によって通知する、
通信方法。 - データを割り当てるリソース領域の複数のパターンに関する設定情報を含む上位レイヤシグナリングを受信し、前記複数のパターンの中からデータ割当に使用する1つのパターンを示す下り制御信号(DCI)を受信し、
前記設定情報及び前記下り制御信号に基づいて、前記データが割り当てられるリソースを決定する、
通信方法。
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