Control device, communication method and integrated circuit

Abstract

To give an appropriate notification of a data area.SOLUTION: In a base station 100, a DCI generation unit 102 selects one pattern (mode) to be used when allocating data from among a plurality of patterns (modes) of a resource area to which the data (PDSCH) is allocated. A transmitting unit 106 notifies setting information about the plurality of patterns (modes) by upper layer signaling. The transmitting unit 106 also notifies the one pattern (mode) selected from the plurality of patterns by a downlink control signal (DCI).SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to a control device, a communication method, and an integrated circuit. [Background technology]

[0002] A communication system called the fifth-generation mobile communication system (5G) is currently under consideration. For 5G, consideration is being given to flexibly providing functions for each use case that requires increased communication traffic, an increased number of connected devices, high reliability, and low latency. Three representative use cases are enhanced mobile broadband (eMBB), massive machine-type communications (mMTC), and ultra-reliable and low-latency communications (URLLC). The 3rd Generation Partnership Project (3GPP), an international standardization organization, is considering the advancement of communication systems from both the perspectives of LTE system advancements and New RAT (Radio Access Technology) (see, for example, Non-Patent Document 1). [Prior art documents] [Non-patent literature]

[0003] [Non-Patent Document 1] RP-161596, "Revision of SI: Study on New Radio Access Technology", NTT DOCOMO, September 2016 Summary of the Invention [Problem to be solved by the invention]

[0004] In the new RAT, it is necessary to consider how to notify data areas (e.g., symbol positions).

[0005] One aspect of the present disclosure contributes to providing a control device, a terminal, and a communication method that can appropriately notify a data area. [Means for solving the problem]

[0006] A base station according to one embodiment of the present disclosure includes a circuit for selecting one pattern to be used for data allocation from among a plurality of patterns of resource regions for allocating data, and a transmitter for notifying configuration information regarding the plurality of patterns by higher layer signaling and notifying the selected one pattern by a downlink control signal (DCI).

[0007] A terminal according to one embodiment of the present disclosure includes a receiver that receives upper layer signaling including configuration information regarding multiple patterns of resource regions to which data is to be allocated, and receives a downlink control signal (DCI) that indicates one pattern to be used for data allocation from the multiple patterns, and a circuit that identifies resources to which the data is to be allocated based on the configuration information and the downlink control signal.

[0008] A communication method according to one embodiment of the present disclosure selects one pattern to be used for data allocation from among multiple patterns of resource regions to which data is allocated, notifies configuration information regarding the multiple patterns by higher layer signaling, and notifies the selected one pattern by a downlink control signal (DCI).

[0009] A communication method according to one embodiment of the present disclosure receives upper layer signaling including configuration information regarding multiple patterns of resource regions to which data is to be allocated, receives downlink control signal (DCI) indicating one pattern to be used for data allocation from the multiple patterns, and determines resources to which the data is to be allocated based on the configuration information and the downlink control signal.

[0010] These comprehensive or specific aspects may be realized as a system, an apparatus, a method, an integrated circuit, a computer program, or a recording medium, or may be realized as any combination of a system, an apparatus, a method, an integrated circuit, a computer program, and a recording medium. [Effects of the Invention]

[0011] According to one aspect of the present disclosure, the data area can be appropriately notified.

[0012] Further advantages and benefits of certain aspects of the present disclosure will become apparent from the specification and drawings. Such advantages and / or benefits may be provided by some of the embodiments and features described in the specification and drawings, respectively, but not necessarily all of them may be provided to obtain one or more identical features. [Brief explanation of the drawings]

[0013] [Figure 1] FIG. 1 shows a partial configuration of a base station according to the first embodiment. [Figure 2] FIG. 2 shows a partial configuration of the terminal according to the first embodiment. [Figure 3] FIG. 3 shows the configuration of a base station according to the first embodiment. [Figure 4] FIG. 4 shows the configuration of a terminal according to the first embodiment. [Figure 5] FIG. 5 shows an example of the operation of the base station and the terminal according to the first embodiment. [Figure 6A] FIG. 6A shows an example of data allocation according to the first operation example of the first embodiment. [Figure 6B] FIG. 6B shows an example of data allocation according to the first operation example of the first embodiment. [Figure 7] FIG. 7 shows an example of data allocation according to the second operation example of the first embodiment. [Figure 8] FIG. 8 shows an example of a slot configuration according to the second embodiment. [Figure 9A] FIG. 9A shows an example of data allocation according to the third embodiment. [Figure 9B] FIG. 9B shows an example of data allocation according to the third embodiment. [Figure 10] FIG. 10 shows an example of data allocation according to the fourth embodiment. DETAILED DESCRIPTION OF THE INVENTION

[0014] Hereinafter, embodiments of the present disclosure will be described in detail with reference to the drawings.

[0015] In LTE, a base station dynamically notifies the number of symbols in a PDCCH (Physical Downlink Shared Channel) region using a PCFICH (Physical Control Format Indicator channel), and data is transmitted from the next symbol in the PDCCH region. Also, in LTE, when the start symbol of data is changed to apply CoMP (Coordinated Multiple Point) or for interference control, it is also possible to notify the start symbol of data by higher layer signaling.

[0016] On the other hand, for the New RAT, it is being considered to notify the start symbol of data in a slot using a Downlink Control Indicator (DCI). Two types of DCI are being considered: a "group common PDCCH" that is intended for simultaneous reception by multiple terminals (UE: User Equipment), and a "UE specific DCI" that is intended for individual reception by each terminal.

[0017] However, in the New RAT, it is being considered to allocate a "group common control resource set" or a "UE specific control resource set," which is a region (control resource set) in which control signals such as DCI are allocated, to a portion of the frequency band of the system band, rather than to the entire frequency band. Therefore, the data region (the number of symbols that can be used for data) differs between the region in which the control resource set is allocated and the region in which the control resource set is not allocated.

[0018] A terminal (user) can recognize the area of ​​the UE specific control resource set allocated to itself or the area of ​​the group common control resource set of the group to which it belongs, but cannot recognize the area of ​​the UE specific control resource set allocated to other terminals or the area used for other purposes (e.g., Sidelink, URLLC, mMTC, etc.). For example, a base station can notify a terminal of resource areas not to be allocated using higher layer signaling and perform data allocation avoiding those resource areas, but notification of resource areas using higher layer signaling results in semi-static allocation. In the New RAT, different slots can be used for different purposes, which poses a problem in that resources cannot be flexibly allocated only by notification from higher layers.

[0019] Therefore, the following describes a method for appropriately notifying a data area and flexibly allocating resources, taking into consideration the area where the control resource set is located.

[0020] [Communication System Overview] A communication system according to each embodiment of the present disclosure includes a base station 100 and a terminal 200.

[0021] Fig. 1 is a block diagram showing a partial configuration of a base station 100 according to an embodiment of the present disclosure. In the base station 100 shown in Fig. 1, a DCI generation unit 102 selects one pattern to be used for data allocation from among multiple patterns (modes) of a resource region to which data is allocated. A transmission unit 106 notifies configuration information regarding the multiple patterns by upper layer signaling, and notifies the selected one pattern by a downlink control signal (DCI).

[0022] Fig. 2 is a block diagram showing a partial configuration of terminal 200 according to an embodiment of the present disclosure. In terminal 200 shown in Fig. 2, receiver 201 receives higher layer signaling including configuration information related to multiple patterns (modes) of resource regions to which data is allocated, and receives downlink control information (DCI) indicating one pattern to be used for data allocation from the multiple patterns. Signal separator 202 identifies resources to which data is allocated based on the configuration information and the downlink control signal.

[0023] (Embodiment 1) [Base station configuration] Fig. 3 is a block diagram showing the configuration of base station 100 according to this embodiment. In Fig. 3, base station 100 includes setting section 101, DCI generation section 102, error correction coding section 103, modulation section 104, signal allocation section 105, transmission section 106, reception section 107, signal separation section 108, demodulation section 109, and error correction decoding section 110.

[0024] Configuration section 101 configures a plurality of patterns of resource regions to which data is allocated (hereinafter referred to as "modes"), and parameters related to the resource regions to which data is allocated in the plurality of modes. For example, configuration section 101 configures the frequency domain (e.g., PRB (Physical Resource Block)) and time domain (e.g., symbol) of resource candidates to be excluded from data allocation. Configuration section 101 then generates higher layer signaling (SIB (System Information Block) or dedicated RRC (Radio Resource Control)) including configuration information related to the plurality of modes (e.g., parameters indicating the frequency domain and time domain). Configuration section 101 outputs the higher layer signaling to error correction coding section 103, and outputs the configuration information to DCI generation section 102, signal allocation section 105, and signal separation section 108.

[0025] The DCI generating unit 102 selects (determines) one mode to be used for data allocation to the terminal 200 from among the multiple modes set by the setting unit 101 based on information (not shown), such as the amount of control signals or data per slot, and generates bit information corresponding to the selected mode.

[0026] DCI generation section 102 generates a downlink control signal (DCI) including resource allocation information (DL allocation information or UL allocation information) for a DL (Downlink) data signal or a UL (Uplink) data signal, and bit information corresponding to the selected Mode, and outputs the DCI to signal allocation section 105. Furthermore, DCI generation section 102 outputs the DL allocation information of the generated DCI to signal allocation section 105, and outputs UL allocation information to signal separation section 108.

[0027] Error correction coding section 103 performs error correction coding on the transmission data signal (DL data signal) and the upper layer signaling (configuration information) inputted from configuration section 101, and outputs the coded signal to modulation section 104.

[0028] 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 .

[0029] Based on the DL allocation information input from DCI generating section 102, signal allocating section 105 allocates the DL data signal received from modulating section 104, configuration information, or DCI, which is a control signal received from DCI generating section 102, to downlink resources. Specifically, signal allocating section 105 allocates the DL data signal to resources other than those excluded from data allocation in accordance with the mode indicated by the DCI input from DCI generating section 102 (the mode selected by DCI generating section 102) out of multiple modes set by setting section 101. A transmission signal is formed in this manner. The formed transmission signal is output to transmitting section 106.

[0030] Transmitting section 106 performs radio transmission processing such as up-conversion on the transmission signal input from signal allocating section 105, and transmits the signal to terminal 200 via an antenna.

[0031] Receiving section 107 receives a signal transmitted from terminal 200 via an antenna, performs radio reception processing such as down-conversion on the received signal, and outputs the signal to signal separating section .

[0032] Signal separating section 108 separates the UL data signal from the received signal received from receiving section 107, based on the information input from DCI generating section 102 (bit information corresponding to the Mode and UL allocation information) and the setting information input from setting section 101. Specifically, signal separating section 108 identifies resources excluded from the allocation of UL data signals in accordance with the Mode indicated by the DCI input from DCI generating section 102 (the Mode selected by DCI generating section 102) from among the multiple Modes set by setting section 101, and separates the signals allocated to the resources other than the resources excluded from the data allocation, and outputs the separated signals to demodulating section 109.

[0033] Demodulation section 109 performs demodulation processing on the signal input from signal separation section 108 and outputs the resulting signal to error correction decoding section 110 .

[0034] Error correction decoding section 110 decodes the signal input from demodulation section 109 and obtains a received data signal (UL data signal) from terminal 200.

[0035] [Device configuration] Fig. 4 is a block diagram showing the configuration of terminal 200 according to the present embodiment. In Fig. 4, terminal 200 includes receiving section 201, signal separating section 202, DCI receiving section 203, demodulating section 204, error correction decoding section 205, setting information receiving section 206, error correction coding section 207, modulating section 208, signal allocating section 209, and transmitting section 210.

[0036] The receiving unit 201 receives a received signal via an antenna, performs reception processing such as down-conversion on the received signal, and then outputs the received signal to the signal separating unit 202. The received signal includes, for example, upper layer signaling (including configuration information) or DCI (including bit information corresponding to the mode selected by the base station 100).

[0037] Signal separating section 202 separates signals allocated to resources to which DCI may be allocated from the received signal received from receiving section 201, and outputs the separated signals to DCI receiving section 203. Furthermore, signal separating section 202 identifies resources excluded from allocation of DL data signals and identifies resources to which DL data signals are allocated, based on information input from DCI receiving section 203 (bit information corresponding to the Mode selected by base station 100 and DL allocation information) and information input from setting information receiving section 206. Then, signal separating section 202 separates DL data signals or higher layer signaling from the received signal, and outputs the separated signals to demodulating section 204.

[0038] DCI receiver 203 detects (receives) DCI by attempting to decode a signal of a resource to which DCI may be allocated, which is input from signal separator 202. DCI receiver 203 outputs UL allocation information indicated in the received DCI to signal allocation section 209, and outputs DL allocation information to signal separator 202. DCI receiver 203 also outputs bit information corresponding to the Mode included in the DCI (Mode selected by base station 100) to signal separator 202.

[0039] Demodulation section 204 demodulates the signal input from signal separation section 202 and outputs the demodulated signal to error correction decoding section 205 .

[0040] The error correction decoding unit 205 decodes the demodulated signal received from the demodulation unit 204 , outputs the obtained received data signal, and outputs the obtained upper layer signaling to the setting information receiving unit 206 .

[0041] The setting information receiving unit 206 identifies parameters indicating the frequency domain and time domain of candidate resources to be excluded from data allocation in a plurality of modes related to data allocation, based on the setting information included in the higher layer signaling output from the error correction decoding unit 205. Then, the setting information receiving unit 206 outputs the parameters related to the plurality of modes to the signal separating unit 202 and the signal allocating unit 209.

[0042] Error correction coding section 207 performs error correction coding on the transmission data signal (UL data signal) and outputs the coded data signal to modulation section 208.

[0043] 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 .

[0044] Signal allocating section 209 identifies resources to be excluded from the allocation of UL data and identifies resources to which the UL data is to be allocated, based on the UL allocation information input from DCI receiving section 203, bit information corresponding to the Mode (Mode selected by base station 100), and information (parameters related to multiple Modes) input from setting information receiving section 206. Then, signal allocating section 209 allocates the data signal input from modulating section 209 to the identified resources, and outputs the data signal to transmitting section 210.

[0045] The transmitter 210 performs transmission processing such as up-conversion on the signal input from the signal allocation unit 209 and transmits the signal via an antenna.

[0046] [Operations of Base Station 100 and Terminal 200] The operations of base station 100 and terminal 200 having the above configuration will now be described in detail.

[0047] FIG. 5 is a sequence diagram showing the operations of base station 100 and terminal 200. As shown in FIG.

[0048] Base station 100 sets data allocation, that is, sets multiple modes (patterns) of the frequency domain or the time domain related to data allocation (ST101). The frequency domain or the time domain in each mode indicates, for example, the frequency domain and the time domain of resource candidates to be excluded from data allocation.

[0049] Base station 100 transmits configuration information (parameters indicating the frequency domain or the time domain) related to the multiple configured modes to terminal 200 using higher layer signaling (SIB or dedicated RRC) (ST102).

[0050] Next, when allocating data, base station 100 selects one mode from the multiple modes set in ST101, and identifies a resource region available for data allocation based on the selected mode (ST103). For example, base station 100 may identify a resource region available for data allocation for each PRB.

[0051] Then, base station 100 transmits data (DL data signal or UL data signal) allocation information and DCI including the selected mode to terminal 200 (ST104).

[0052] Meanwhile, terminal 200 identifies resource regions available for data allocation based on the configuration information (frequency domain and time domain) included in the higher layer signaling received in ST102 and the DCI received in ST104 (ST105). For example, terminal 200 may identify resource regions available for data allocation for each PRB. Specifically, terminal 200 selects one mode notified by DCI from among multiple modes, and identifies resource regions to be excluded from data allocation, i.e., resource regions available for data allocation, using configuration information related to the selected mode.

[0053] Then, base station 100 and terminal 200 transmit and receive data (DL data signal or UL data signal) using the identified resource (ST106).

[0054] As described above, in the present embodiment, when reporting data allocation information, base station 100 reports configuration information (parameters indicating the frequency domain or the time domain) related to multiple data allocation modes (patterns) by higher layer signaling, and reports one mode (pattern) to be used for actual data allocation by DCI. That is, data allocation is reported using both higher layer signaling and DCI.

[0055] As a result, base station 100 only needs to notify one Mode (bit information) by DCI when allocating data, and does not need to notify setting information related to the frequency domain or the time domain every time data is allocated, so it is possible to reduce the signaling overhead of DCI and exclude areas used for purposes other than data from the data area.Furthermore, base station 100 can dynamically change the Mode to be used for data allocation from multiple Modes by DCI, thereby enabling flexible data allocation.

[0056] Next, operation examples 1 and 2 according to this embodiment will be described.

[0057] <Example 1> Base station 100 sets, for example, "Mode 1" shown in FIG. 6A and "Mode 2" shown in FIG. 6B as the data allocation mode. Furthermore, base station 100 notifies, using higher layer signaling, the frequency domain "X0" and start symbols "A0," "A1," and "A2," which are symbols at which data allocation starts, as setting information related to Mode 1 and Mode 2. Here, as will be described later, A0 is a parameter related to Mode 1, and X0, A1, and A2 are parameters related to Mode 2. The frequency domain X0 may be represented by, for example, a PRB number or an RBG number.

[0058] Furthermore, base station 100 uses one bit included in DCI to notify terminal 200 of Mode 1 or Mode 2 as the mode to be used for data allocation.

[0059] Terminal 200 identifies a resource region to which data is allocated based on information corresponding to the Mode indicated in the DCI, out of configuration information related to Mode 1 and Mode 2 notified by higher layer signaling.

[0060] Here, in each mode, for example, data is assigned as follows: Mode 1: Data is allocated starting from symbol A0. Mode 2: In the frequency domain X0, data is allocated starting from symbol A1, and in frequency domains other than X0, data is allocated starting from symbol A2.

[0061] Furthermore, {X0, A0, A1, A2}, which is notified as configuration information by upper layer signaling, may be set as follows: Frequency domain X0: Same frequency domain as UE specific control resource set A0: Group the symbol after the symbol where the common control resource set is placed A1: The symbol after the symbol where the UE specific control resource set is placed A2: Symbol #0

[0062] That is, for Mode 1, A0 indicates the start position (start symbol) of the time domain to which the DL data signal is allocated.

[0063] Furthermore, with regard to Mode 2, X0 indicates the frequency domain to which DL control signals (e.g., UE-specific DCI, etc.) are allocated, A1 indicates the start position of the time domain to which DL data signals are allocated in the frequency domain X0, and A2 indicates the start position of the time domain to which DL data signals are allocated in a frequency domain other than the frequency domain X0.

[0064] That is, in Mode 1, terminal 200 specifies the start position of the symbol to which data (PDSCH) is allocated based on the start symbol (A0) notified by higher layer signaling, regardless of the data resource to which data (PDSCH) is allocated (resource indicated in DL allocation information), as shown in Fig. 6A. That is, in Mode 1, data is allocated starting from symbol A0 across the entire band of the data resource.

[0065] Therefore, even if both the UE specific control resource set and the Group common control resource set overlap with the data resources in the frequency domain, or even if the UE specific control resource set for another terminal overlaps with the data resources in the frequency domain, it is possible to arrange data for terminal 200 while avoiding these control signal regions.

[0066] Mode 1 is also effective when it is desired to reduce interference with the first half of symbols (for example, symbols before symbol A0) in ICIC (Inter Cell Interference Coordination).

[0067] On the other hand, in Mode 2, terminal 200 identifies resources to which data (PDSCH) is allocated based on the frequency domain (X0) and start symbols (A1, A2) notified by higher layer signaling, as shown in Fig. 6B. That is, in Mode 2, the start positions of symbols to which data is allocated differ between frequency domain X0 and areas other than frequency domain X0.

[0068] Therefore, Mode 2 is effective when, for example, data resources and frequency domain X0 (UE specific control resource set) overlap, as shown in Fig. 6B. Specifically, among data resources for terminal 200, data can be allocated in frequency domain X0, avoiding the UE specific control resource set, and data can be allocated from symbol #0 (A2) in areas other than frequency domain X0. This allows resources to be used efficiently.

[0069] In the above example, the case where the frequency domain X0 is the same as the UE specific control resource set has been described, but the frequency domain X0 may be the same as the group common control resource set, or may be a frequency domain that combines the UE specific control resource set and the group common control resource set. If the frequency domain X0 is the same as the UE specific control resource set or the group common control resource set, it is possible to reduce signaling in higher layers.

[0070] Furthermore, frequency domain X0 may be notified in PRB units or RBG (Resource Block Group) units. By notifying frequency domain X0 in PRB units or RBG units, base station 100 can more flexibly instruct resources to terminal 200, and can therefore avoid areas of control resource sets allocated to other terminals or areas used for other purposes.

[0071] Furthermore, the start symbol A0 is not limited to the group common control resource set, and may be, for example, the symbol following the symbol located at the rearmost position in the control signal channel. Furthermore, the start symbols A0, A1, and A2 may be the symbols following the symbol where the group common control resource set or group common control resource is located, and may indicate the symbol number. Furthermore, A0 and A2 may be the same value, or A1 and A2 may be the same value.

[0072] <Example 2> In operation example 1, a case has been described in which two modes (Mode 1 and Mode 2) are prepared using higher layer signaling, and one bit included in DCI is used to switch between Mode 1 and Mode 2. In contrast, in operation example 2, a case has been described in which four modes (Mode 1, Mode 2, Mode 3, and Mode 4) are prepared using higher layer signaling, and two bits included in DCI are used to switch between Mode 1, Mode 2, Mode 3, and Mode 4.

[0073] FIG. 7 shows examples of Mode 1, Mode 2, Mode 3, and Mode 4 according to the second operation example.

[0074] Specifically, base station 100 sets, for example, Mode 1 to Mode 4 shown in FIG. 7 as the data allocation mode. Furthermore, base station 100 notifies, using higher layer signaling, frequency domains "X0" and "X1" and data start symbols "A0", "A1", "A2", "A3", "A4", and "A5" as configuration information related to Mode 1 to Mode 4. Here, as will be described later, 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, and X1, A4, and A5 are parameters related to Mode 4. The frequency domains X0 and X1 may be represented by, for example, a PRB number or an RBG number.

[0075] Furthermore, base station 100 uses two bits included in DCI to notify terminal 200 of one of Mode 1, Mode 2, Mode 3, or Mode 4 as the mode to be used for data allocation.

[0076] Terminal 200 identifies a resource region to which data is allocated based on information corresponding to the mode indicated in the DCI, out of the configuration information related to Modes 1 to 4 notified by higher layer signaling.

[0077] Here, in each mode, for example, data is assigned as follows: Mode 1: Data is allocated starting from symbol A0. Mode 2: Data is allocated starting from symbol A1. Mode 3: In the frequency domain X0, data is allocated starting from symbol A2, and in frequency domains other than X0, data is allocated starting from symbol A3. Mode 4: In the frequency domain X1, data is allocated from symbol A4, and in frequency domains other than X1, data is allocated from symbol A5.

[0078] Furthermore, {X0, X1, A0, A1, A2, A3, A4, A5}, which is notified as configuration information by upper layer signaling, may be set as follows: Frequency domain X0: Same frequency domain as UE specific control resource set Frequency domain X1: Frequency domain combining UE specific control resource set and Group common control resource set A0: Group the symbol after the symbol where the common control resource set is placed A1: Symbol #0 A2: The symbol after the symbol where the UE specific control resource set is placed A3: Symbol #0 A4: Symbol following the symbol where the Group common control resource set or UE specific control resource set is located A5: Symbol #0

[0079] That is, for Mode 1, A0 indicates the start position (start symbol) of the time domain to which the DL data signal is allocated.

[0080] Furthermore, for Mode 2, A1 indicates the start position (start symbol) of the time domain to which the DL data signal is allocated.

[0081] Furthermore, with regard to Mode 3, X0 indicates the frequency domain to which DL control signals (e.g., UE-specific DCI, etc.) are allocated, A2 indicates the start position of the time domain to which DL data signals are allocated in the frequency domain X0, and A3 indicates the start position of the time domain to which DL data signals are allocated in a frequency domain other than the frequency domain X0.

[0082] Furthermore, for Mode 4, X1 indicates the frequency domain to which a DL control signal (e.g., UE specific DCI or group common PDCCH, etc.) is allocated, A4 indicates the start position of the time domain to which a DL data signal is allocated in frequency domain X1, and A5 indicates the start position of the time domain to which a DL data signal is allocated in a frequency domain other than frequency domain X1.

[0083] Mode 1 in FIG. 7 is the same operation as Mode 1 (FIG. 6A) in operation example 1. That is, in Mode 1, terminal 200, as shown in FIG. 7, specifies the start position of the symbol to which data (PDSCH) is allocated based on the start symbol (A0) notified by higher layer signaling, regardless of the data resource to which data (PDSCH) is allocated (resource indicated in DL allocation information). That is, in Mode 1, data is synchronized across the entire band of the data resource.

[0084] In Mode 2, data allocation starts from a different symbol (symbol #0 in FIG. 7) than in Mode 1. That is, in Mode 2, data (PDSCH) is allocated starting from symbol #0 regardless of the data resource, as shown in FIG. 7. In this way, in Mode 2, data is allocated starting from symbol #0, and therefore Mode 2 is effective, for example, when data is allocated to terminal 200 in a frequency domain that does not overlap with the control resource set.

[0085] In Mode 3, similar to Mode 2 (FIG. 6B) of operation example 1, the start symbols to which data is allocated are different between frequency domain X0 and the areas other than frequency domain X0. In Mode 3, data for terminal 200 can be allocated in frequency domain X0, avoiding the UE specific control resource set, and data can be allocated from symbol #0 in the areas other than frequency domain X0. This allows for efficient use of resources. In this way, Mode 3 in FIG. 7 is effective when data is allocated to a frequency domain that overlaps with frequency domain X0 (UE specific control resource set).

[0086] In Mode 4, as in Mode 3, the start symbols to which data is allocated differ between frequency domain X1 and the regions other than frequency domain X1. In Mode 4, data for terminal 200 can be allocated in frequency domain X1, avoiding control signals, and data for terminal 200 can be allocated from symbol #0 in the regions other than frequency domain X1. This allows for efficient use of resources. In this way, Mode 4 in FIG. 7 is effective when data is allocated to a frequency region that overlaps with frequency domain X1 (UE specific control resource set and group common control resource set). However, if the number of symbols in the UE specific control resource set and the group common control resource set differ, A4 must be set to match the one with the longer number of symbols.

[0087] The frequency regions X0 and X1 may be the same frequency region as the UE specific control resource set, the same region as the group common control resource set, or a frequency region combining the UE specific control resource set and the group common control resource set. Using the frequency regions X0 and X1 as the UE specific control resource set or the group common control resource set can reduce signaling in higher layers.

[0088] Furthermore, the frequency domains X0 and X1 may be specified in PRB units or RBG units. Specifying the frequency domains X0 and X1 in PRB units or RBG units allows base station 100 to specify resources more flexibly to terminal 200, thereby making it possible to avoid frequency domains of control resource sets allocated to other mobile stations or domains used for other purposes.

[0089] Furthermore, the start symbol A0 is not limited to the group common control resource set, and may be, for example, the symbol following the symbol located at the rearmost position in the control signal channel. Also, A0, A1, A2, A3, A3, and A5 may be symbols following the symbol where the group common control resource set or group common control resource is located, and symbol numbers may be notified. Also, A0, A1, A3, and A5 may be symbol #0. Alternatively, A0, A2, and A4 may have the same value, and A1, A3, and A5 may have the same value.

[0090] The above describes operation examples 1 and 2. For example, the base station 100 may select one mode suitable for the allocation resources of DL data from among a plurality of modes based on the relationship (e.g., whether there is overlap, etc.) between the allocation resources (data resources) of the DL data signal (PDSCH) and the allocation resources (control resource set) of the control signal.

[0091] In this manner, in the present embodiment, base station 100 notifies, by higher layer signaling, configuration information (for example, X0, X1, A0, A1, A2, A3, A4, A5, etc.) related to multiple modes of a resource region to which data is allocated. Base station 100 also selects one mode to use for data allocation from the multiple modes and notifies, by DCI, the selected one pattern. Terminal 200 identifies resources from the configuration information already notified by higher layer signaling, using parameters corresponding to the mode notified by DCI.

[0092] As a result, base station 100 can perform dynamic resource allocation that takes into account different uses for each slot by notifying terminal 200 of the Mode by DCI. Furthermore, when changing resource allocation, base station 100 only needs to notify the Mode by using DCI, and does not need to notify resources (for example, symbol start positions of data for each frequency domain) every time resource allocation is changed, thereby reducing the signaling overhead of DCI.

[0093] Furthermore, base station 100 can perform flexible data allocation that avoids resource regions that are not allocated to terminal 200 in each slot by selecting a mode according to resources (control resource set) in which a control signal channel is allocated.

[0094] Therefore, according to this embodiment, the data area (start position of data) is appropriately notified in consideration of the area where the control resource set is arranged, and resources can be flexibly allocated.

[0095] In addition, when the area of ​​the group common control resource set or the UE specific control resource set is dynamically changed by a control signal that indicates the configuration of a slot called the group common PDCCH, the frequency areas such as X0 and X1 may follow the area indicated by the group common PDCCH.

[0096] Furthermore, the frequency domains such as X0 and X1 and the time domains such as A2 and A4 may be variable depending on the PDCCH detected by terminal 200. For example, X0 may be the same frequency domain as the PDCCH (DL allocation or UL allocation, or both) detected in the UE specific control resource set by terminal 200, and A2 may be the time domain of the PDCCH detected by terminal 200. In this way, only resources used for PDCCH transmission in the UE specific control resource set are excluded from data allocation, and resources not used for PDCCH transmission can be used for data allocation. In this case, X1 may be the entire Common control resource set, the entire UE specific control resource set, or the entire domain of both, and it is also possible to switch between Mode 3 and Mode 4 so that part of the UE specific control resource set can be used for data, or the entire UE specific control resource set cannot be used for data.

[0097] In the above operation example, a case has been described in which half of the modes are modes that use the frequency domain X0 or X1 (Mode 3, Mode 4) and half are modes that do not use X0 or X1 (Mode 1, Mode 2), but the present invention is not limited to this. Base station 100 may set all modes to modes that use the frequency domain X0 or X1, or may set all modes to modes that do not use the frequency domain X0 or X1. When all modes are modes that use the frequency domain, flexibility in data allocation is improved, and when all modes are modes that do not use the frequency domain, operation is simplified, which is particularly suitable when ICIC or CoMP is assumed.

[0098] (Embodiment 2) In embodiment 1, the case where the start position (start symbol) of data is notified in the time domain is described, whereas in this embodiment, the case where a symbol (e.g., symbol number) or frequency band (e.g., PRB) used as a data region in the time domain or frequency domain is notified is described.

[0099] Note that the base station and terminal according to this embodiment have the same basic configuration as base station 100 and terminal 200 according to embodiment 1, and therefore will be described with reference to FIGS.

[0100] In the following, as an example, one slot consists of seven symbols. Also, assume that each symbol has three states (types): DL symbol, UL symbol, and symbol for other uses. In this case, to notify all state patterns for the seven symbols in one slot, a number of bits is required to notify 3 to the power of 7 (2187) different patterns. Therefore, there is a problem that notifying all information by DCI results in a large overhead.

[0101] Therefore, in this embodiment, base station 100 first uses higher layer signaling (SIB or dedicated RRC) to notify terminal 200 of configuration information indicating multiple patterns of symbol configurations or frequency band configurations within slots configured with DL symbols, UL symbols, or symbols used for other purposes. Then, base station 100 selects one pattern from the multiple patterns and identifies a resource region (for example, in units of symbols or PRBs) that can be used for data allocation based on the selected pattern. Furthermore, the base station notifies terminal 200 of the selected pattern by DCI.

[0102] Meanwhile, terminal 200 receives multiple patterns indicating the symbol configuration or frequency band configuration within a slot through higher layer signaling. Terminal 200 then selects one pattern notified by DCI from the multiple patterns and identifies a resource region (e.g., symbol or PRB unit) available for data allocation.

[0103] As a result, base station 100 only needs to notify one pattern indicating a symbol configuration or frequency band by DCI when allocating data, and does not need to notify resources used as a data region in the time domain or frequency domain every time data is allocated, thereby reducing the signaling overhead of DCI. Furthermore, base station 100 can dynamically change the resource configuration within a slot by DCI, allowing for flexible data allocation.

[0104] Next, operation examples 1 and 2 according to this embodiment will be described.

[0105] <Example 1> In operation example 1, an operation for notifying a symbol in a slot will be described.

[0106] The base station 100 uses higher layer signaling to notify the configuration of DL symbols, UL symbols, and symbols used for other purposes within one slot or multiple slots. In the following, the number of symbols within a slot is assumed to be 7. As an example of higher layer signaling, the base station 100 selects four patterns from the following patterns (a) to (g).

[0107] Notifications per slot: (a) All 7 symbols are DL symbols (b) 6 symbols are DL symbols and 1 symbol is UL symbol (Mainly used for DL ​​data transmission, UL for control signal transmission) (c) 5 symbols are DL symbols and 2 symbols are UL symbols (Mainly used for DL ​​data transmission, UL for control signal transmission) (d) 2 symbols are DL symbols, 5 symbols are UL symbols (Mainly used for UL data transmission, DL for control signal transmission) (e) 1 symbol is a DL symbol, 6 symbols are UL symbols (Mainly used for UL data transmission, DL for control signal transmission) (f) 4 symbols are DL symbols and 3 symbols are symbols used for other purposes (The first half is used for DL ​​data transmission, and the second half is used for minislot or sidelink) (g) 1 symbol is a DL symbol and 6 symbols are symbols used for other purposes (Mainly used to transmit other data, DL is used to transmit control signals)

[0108] Multi-slot notifications: Base station 100 may notify a combination of multiple slot patterns from the above patterns (a) to (g) for each slot.

[0109] For example, when base station 100 notifies two slots' worth of patterns at once, in the case of pattern (a)(a), all 14 symbols in the two slots are DL symbols. Also, when notifying every two slots, terminal 200 may monitor DCI every two slots.

[0110] Furthermore, in the case of notification every multiple slots, the base station 100 may select four patterns from among patterns (a) to (i) by adding the following patterns (h) and (i) within one slot. (h) All 7 symbols are UL symbols (i) All seven symbols are used for other purposes

[0111] A pattern with a longer period may be notified using higher layer signaling. The longer period may include, for example, notification equivalent to DL, UL, and special subframes in subframe (1 msec) units that were notified as DL / UL configuration in LTE. Notification equivalent to LTE has the effect of reducing the impact of interference on other cells when a New RAT base station and an LTE base station are present in the same frequency band.

[0112] When four symbol configuration patterns are specified from the above (a) to (g) (or (a) to (i)) using higher layer signaling, base station 100 uses two bits included in DCI to notify terminal 200 of the pattern to be used for actual data allocation for each slot or for each set of slots. DCI including the selected pattern may be transmitted, for example, by group common PDCCH or UE specific DCI.

[0113] For example, if base station 100 notifies terminal 200 using DCI that four slots worth of patterns are patterns (a), (c), (e), and (f) for each slot, the allocation for each slot will be as shown in Figure 8.

[0114] Terminal 200 identifies DL symbols, UL symbols, and symbols used for other purposes within a slot based on the pattern notified by DCI. Terminal 200 can then determine, based on the positions (configuration) of the identified DL symbols, which symbols should be used to transmit DL data, control signals, and reference signals (CSI-RS (Channel State Information Reference signal), DMRS (Demodulation reference signal), CRS (cell specific Reference signal), and PT-RS (Phase Tracking Reference Signal)). Terminal 200 can also determine, based on the positions of the identified UL symbols, which symbols should be used to transmit UL data, UL control signals (ACK / NACK, CSI (Channel State Information), SR (Scheduling Request)), and reference signals (DMRS, SRS (Sounding Reference Signal)).

[0115] Although the above description has been given of the case where the symbol for each slot is either DL, UL, or a symbol used for other purposes, the DCI and higher layer signaling may be individually configured to notify only DL symbols, notify only UL symbols, or notify only symbols for other purposes.

[0116] Furthermore, the symbol configuration within a slot is not limited to the above patterns (a) to (i), and the number of patterns notified by higher layer signaling is not limited to four, but may be any number other than four.

[0117] <Example 2> In the second operation example, an operation for notifying the frequency domain within a slot will be described.

[0118] Base station 100 transmits, by using higher layer signaling, configuration information regarding multiple patterns (modes) of the DL and UL frequency domain configurations within one slot or multiple slots. The frequency domain may be represented by, for example, a PRB number or an RBG number.

[0119] For example, when DCI is 2 bits, base station 100 notifies DL frequency domains X0, X1, X2, and X3 and UL frequency domains Y0, Y1, Y2, and Y3 corresponding to Modes 1 to 4, respectively, using higher layer signaling. 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

[0120] Then, base station 100 uses 2-bit DCI to notify terminal 200 of one of Modes 1 to 4 as the Mode to be used for data allocation.

[0121] Terminal 200 receives higher layer signaling and recognizes DL frequency domains X0, X1, X2, and X3 and UL frequency domains Y0, Y1, Y2, and Y3 of Modes 1 to 4. Terminal 200 then receives DCI and identifies the frequency domains within one slot or multiple slots.

[0122] By identifying the frequency domain, terminal 200 knows the arrangement of CSI-RS in DL or the arrangement of RS to be measured for mobility, and can therefore use RS in an area where no data is allocated. Furthermore, terminal 200 knows the frequency band in which to transmit ACK / NACK, CSI, and SR or the band in which to transmit SRS in UL.

[0123] Depending on the frequency bandwidth used, the granularity of allocation of DL data or UL data, RBG (PRB unit, 2PRB unit, 3PRB unit, 4PRB unit) may be changed.

[0124] In the above example, the DL frequency band and the UL frequency band are notified separately, but a band common to both DL and UL may be notified.Furthermore, in addition to the DL frequency band and the UL frequency band, frequency bands for other uses may also be notified.

[0125] Operation examples 1 and 2 according to this embodiment have been described above.

[0126] Note that the first and second operation examples may be combined to notify the symbols and frequency domains within one slot or multiple slots by signaling in a higher layer.

[0127] As described above, in the present embodiment, base station 100 notifies, by higher layer signaling, configuration information relating to a plurality of patterns (Modes) indicating the configuration of a resource region within a slot (for example, some of the above (a) to (i), or X0, X1, X2, X3, Y0, Y1, Y2, Y3, etc.). Furthermore, base station 100 selects one pattern (Mode) to be used for data allocation from the plurality of patterns (Modes), and notifies, by DCI, the selected pattern. Terminal 200 identifies resources from the configuration information already notified by higher layer signaling, using parameters corresponding to the pattern (Mode) notified by DCI.

[0128] As a result, base station 100 can perform dynamic resource allocation that takes into account different uses for each slot by notifying terminal 200 of the pattern (Mode) by DCI. Furthermore, when changing the configuration within a slot, base station 100 only needs to notify the pattern (Mode) by using DCI, and does not need to notify resources (for example, symbol positions or frequency bands of data within a slot) every time resource allocation is changed, thereby reducing the signaling overhead of DCI.

[0129] Therefore, according to this embodiment, the data region (data symbols or frequency bands) can be appropriately notified, and resources can be flexibly allocated.

[0130] (Embodiment 3) A base station and a terminal according to this embodiment have the same basic configuration as base station 100 and terminal 200 according to the first embodiment, and therefore will be described with reference to FIGS.

[0131] In the first embodiment, a control resource set placed at the beginning of a slot is assumed as an area to which data is not allocated, whereas in the present embodiment, a case is described in which a signal (e.g., a URLCC signal) is assumed to be inserted in the middle of a slot.

[0132] It is assumed that URLLC signals are transmitted and received in minislots, which consist of fewer symbols than the slots in which other signals are transmitted and received. That is, minislots use a portion of a slot. Therefore, the area not used for minislots can be used for transmitting and receiving other signals. Therefore, it is conceivable to notify the area used for minislots for each slot.

[0133] In this embodiment, a method will be described in which, in order to increase the flexibility of data allocation, higher layer signaling and DCI are used in combination to notify the area used in the minislot.

[0134] An example of operation according to this embodiment will be described below.

[0135] The base station 100 uses higher layer signaling to notify the terminal 200 to which resources are allocated in slot units of the frequency domain X0 and symbol number Y0 that the minislot may occupy. The frequency domain is represented by, for example, a PRB number or an RBG number.

[0136] Furthermore, base station 100 uses one bit included in DCI to notify Mode 1 or Mode 2, which will be described later, as the mode used for data allocation.

[0137] Terminal 200 identifies a resource region to which data is allocated based on configuration information (X0, Y0) notified by higher layer signaling and Mode 1 or Mode 2 indicated in DCI.

[0138] Here, in each mode, for example, data is assigned as follows: Mode 1: Data is arranged in an area allocated to terminal 200 in slot units (see, for example, FIG. 9A). Mode 2: Of the regions in which data is allocated to terminal 200 in slot units, no data is allocated to symbol number Y0 in frequency region X0 (see, for example, FIG. 9B).

[0139] Furthermore, {X0, Y0} notified by higher layer signaling may be set as follows: Frequency domain X0:PRB#2~PRB#5 Time domain Y0: Symbols #3, #4, #5

[0140] The frequency domain X0 and time domain Y0 included in the configuration information notified by higher layer signaling indicate a portion of the resource region that the slot may occupy within the slot. The modes notified by DCI include Mode 1, in which data is not allocated to a portion of the resource region corresponding to the minislot, and Mode 2, in which data is allocated to a portion of the resource region corresponding to the minislot.

[0141] Base station 100 selects a mode for terminal 200 depending on the resource allocation status of terminal 200, to which resources are allocated in slot units, and other terminals, to which resources are allocated in minislot units, and notifies the selected mode by DCI.

[0142] As a result, in Mode 1, terminal 200 can recognize that there are no other terminals using the minislot, and therefore can use all of the resources allocated to terminal 200.

[0143] Furthermore, in Mode 2, there is a possibility that other terminals may use the minislot, so data for terminal 200 can be allocated in a manner that avoids areas that may be used in the minislot.

[0144] As described above, in this embodiment, base station 100 transmits configuration information (for example, the above-mentioned X0, Y0, etc.) related to a portion of a resource region within a slot (a region that may be occupied by a minislot) by higher layer signaling. Base station 100 also selects one Mode to be used for data allocation from among multiple Modes, and transmits the selected pattern by DCI. Terminal 200 identifies resources to be allocated to terminal 200 based on the configuration information that has already been transmitted by higher layer signaling and the Mode transmitted by DCI.

[0145] As a result, base station 100 can perform dynamic resource allocation that takes into account different uses for each slot by notifying terminal 200 of the Mode by means of DCI. Furthermore, when changing the allocation of the data region in a slot, base station 100 only needs to notify the Mode by means of DCI, and does not need to notify resources (e.g., resources occupied by a minislot) every time the resource allocation is changed, thereby reducing the signaling overhead of DCI.

[0146] Therefore, according to this embodiment, the data area can be appropriately notified and resources can be flexibly allocated.

[0147] The number of modes is not limited to two, but may be three or more. In this case, it is possible to notify multiple resources to be used as minislots, and it is also possible to change the size of the minislot area.

[0148] Furthermore, the frequency domain X0 and time domain Y0 that specify resources that may be used as minislots are not limited to contiguous domains, and non-contiguous domains may be specified.

[0149] Furthermore, although the signals inserted into the slots are assumed to be URLLC signals, they may be signals for other purposes. For example, the signals may be signals for inserting reference signals such as CSI-RS, Sidelink signals used for D2D, or signals for interference suppression.

[0150] (Fourth embodiment) In the first embodiment, allocation of DL data (PDSCH) is mainly assumed, whereas in the present embodiment, a case will be described in which allocation of UL data (PUSCH: Physical Uplink Shared Channel) is assumed.

[0151] A terminal can recognize the ACK / NACK, CSI, SR, and SRS regions allocated to itself, but cannot recognize regions allocated to other terminals or regions used for other purposes (e.g., Sidelink, URLLC, mMTC). As described above, a base station can notify a terminal of resource regions not to be allocated using higher layer signaling and perform data allocation avoiding these resource regions. However, notification of resource regions using higher layer signaling results in semi-static allocation. In the New RAT, different slots may be used for different purposes, which poses a problem of low flexibility in resource allocation when only notification by higher layers is used.

[0152] Therefore, in the present embodiment, similarly to the first embodiment, the area available for UL data is notified by combining higher layer signaling and DCI.

[0153] A base station and a terminal according to this embodiment have the same basic configuration as base station 100 and terminal 200 according to the first embodiment, and therefore will be described with reference to FIGS.

[0154] Specifically, base station 100 sets a plurality of modes (patterns) in the frequency domain or the time domain related to data allocation. Furthermore, base station 100 transmits configuration information (parameters indicating the frequency domain or the time domain) related to the set plurality of modes to terminal 200 using higher layer signaling (SIB or dedicated RRC).

[0155] Furthermore, when allocating data, base station 100 selects one mode from among multiple modes and specifies a resource region available for UL data allocation, for example, for each PRB, based on the selected mode. Then, base station 100 transmits DCI including data allocation information and the selected mode to terminal 200.

[0156] Meanwhile, terminal 200 identifies a resource region (for example, in units of PRB) available for allocation of UL data based on the configuration information and DCI included in the received higher layer signaling.

[0157] As described above, in this embodiment, when base station 100 notifies UL data allocation information, it notifies configuration information related to multiple UL data allocation modes by higher layer signaling, and notifies one mode to be used for actual UL data allocation by DCI. That is, UL data allocation is notified using both higher layer signaling and DCI.

[0158] As a result, similar to the first embodiment (downlink allocation), base station 100 only needs to notify one mode by DCI at the time of data allocation, and does not need to notify setting information related to the frequency domain or the time domain every time data is allocated, so that it is possible to eliminate areas used for purposes other than data from the data area while reducing the signaling overhead of DCI.Furthermore, base station 100 can dynamically change the mode used for data allocation from multiple modes by DCI, thereby enabling flexible data allocation.

[0159] An example of operation according to this embodiment will be described below.

[0160] In the following, as in operation example 2 of embodiment 1, a case will be described in which four modes (Mode 1, Mode 2, Mode 3, and Mode 4) are provided in higher layer signaling, and switching between Mode 1, Mode 2, Mode 3, and Mode 4 is performed using two bits included in DCI.

[0161] FIG. 10 shows examples of Mode 1, Mode 2, Mode 3, and Mode 4 according to this operation example.

[0162] Specifically, base station 100 sets, for example, Mode 1 to Mode 4 shown in Fig. 10 as the data allocation mode. Furthermore, base station 100 notifies, using higher layer signaling, frequency domains "X0" and "X1" and data end symbols "A0", "A1", "A2", "A3", "A4", and "A5" as configuration information related to Mode 1 to Mode 4. Here, as will be described later, 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, and X1, A4, and A5 are parameters related to Mode 4. The frequency domains X0 and X1 may be represented by, for example, a PRB number or an RBG number.

[0163] Furthermore, base station 100 uses two bits included in DCI to notify terminal 200 of one of Mode 1, Mode 2, Mode 3, or Mode 4 as the mode to be used for data allocation.

[0164] Terminal 200 identifies a resource region to which data is allocated based on information corresponding to the mode indicated in the DCI, out of the configuration information related to Modes 1 to 4 notified by higher layer signaling.

[0165] Here, in each mode, for example, data is assigned as follows: Mode 1: Data is allocated up to symbol A0. Mode 2: Data is allocated up to symbol A1. Mode 3: In the frequency domain X0, data is allocated up to symbol A2, and in frequency domains other than X0, data is allocated up to symbol A3. Mode 4: In the frequency domain X1, data is allocated up to symbol A4, and in frequency domains other than X1, data is allocated up to symbol A5.

[0166] Furthermore, {X0, X1, A0, A1, A2, A3, A4, A5}, which is notified as configuration information by upper layer signaling, may be set as follows: Frequency domain X0: Same frequency domain as ACK / NACK Frequency domain X1: Frequency domain combining ACK / NACK and CSI A0: Symbol before the symbol where ACK / NACK, CSI, and SRS are placed A1: Final symbol of the slot A2: The symbol before the symbol where ACK / NACK is placed A3: Final symbol of the slot A4: Symbol before ACK / NACK or CSI A5: Final symbol of the slot

[0167] That is, for Mode 1, A0 indicates the end position of the time domain to which the UL data signal is allocated.

[0168] Also, for Mode 2, A1 indicates the end position of the time domain to which the UL data signal is allocated.

[0169] Furthermore, for Mode 3, X0 indicates the frequency domain to which UL control signals (e.g., ACK / NACK, etc.) are allocated, A2 indicates the end position of the time domain to which UL data signals are allocated in the frequency domain X0, and A3 indicates the end position of the time domain to which UL data signals are allocated in a frequency domain other than the frequency domain X0.

[0170] Furthermore, for Mode 4, X1 indicates the frequency domain to which UL control signals (e.g., ACK / NACK, CSI, etc.) are allocated, A4 indicates the end position of the time domain to which UL data signals are allocated in frequency domain X1, and A5 indicates the end position of the time domain to which UL data signals are allocated in frequency domains other than frequency domain X1.

[0171] That is, in Mode 1, terminal 200 specifies the end position of symbols to which data (PUSCH) is allocated based on the end symbol (A0) notified by higher layer signaling, regardless of the data resource to which data (PUSCH) is allocated (resource indicated in UL allocation information), as shown in Fig. 10. That is, in Mode 1, data is allocated up to symbol A0 in the entire band of the data resource.

[0172] In Mode 2, data is allocated up to symbols (the last symbol of the slot in FIG. 10) differently from Mode 1. That is, in Mode 2, data (PUSCH) is allocated up to the last symbol of the slot, regardless of the data resource, as shown in FIG. 10. In this way, since data is allocated up to the last symbol of the slot in Mode 2, Mode 2 is effective, for example, when data is allocated to terminal 200 in a frequency domain that does not overlap with a UL control signal or a reference signal.

[0173] In Mode 3, the end symbol to which data is allocated differs between frequency domain X0 and the domain outside frequency domain X0. In Mode 3, terminal 200 can allocate data in frequency domain X0 while avoiding ACK / NACK (the last symbol of the slot), and can allocate data up to the last symbol of the slot in the domain outside frequency domain X0. This allows for efficient use of resources. In this way, Mode 3 is effective when data is allocated to a frequency domain that overlaps with frequency domain X0 (ACK / NACK).

[0174] In Mode 4, similar to Mode 3, the end symbol to which data is allocated differs between frequency domain X1 and the domain other than frequency domain X1. In Mode 4, terminal 200 can allocate data in frequency domain X1 while avoiding control signals (ACK / NACK and CSI), and can allocate data up to the last symbol of the slot in the domain other than frequency domain X1. This allows for efficient use of resources. In this way, Mode 4 is effective when data is allocated to a frequency domain that overlaps with frequency domain X1 (ACK / NACK and CSI). However, if the number of symbols for ACK / NACK and CSI differs, A4 must be set according to the longer number of symbols.

[0175] For example, base station 100 may select one Mode suitable for the allocation resources of UL data from among multiple Modes based on the relationship (e.g., whether there is overlap, etc.) between the allocation resources (data resources) of UL data signals (PUSCH) and the allocation resources of control signals (ACK / NACK, CSI, etc.).

[0176] The frequency domains X0 and X1 may be the same frequency domain as that of ACK / NACK, CSI, SRS, or SR, or may be a frequency domain that combines these.

[0177] Furthermore, the frequency domains X0 and X1 may be specified in PRB units or RBG units. Specifying the frequency domains X0 and X1 in PRB units or RBG units allows base station 100 to specify resources to terminal 200 more flexibly, thereby making it possible to avoid frequency domains for control signals, reference signals, or data allocated to other mobile stations, or to avoid domains used for other purposes.

[0178] Also, A0, A1, A2, A3, A4, and A5 may be symbols preceding the symbol where ACK / NACK, CSI, SRS, or SR is placed, and may indicate the symbol number. Also, A0, A1, A3, and A5 may be the last symbol of a slot or subframe. Alternatively, A0, A2, and A4 may be the same value, and A1, A3, and A5 may be the same value.

[0179] In this manner, in the present embodiment, base station 100 notifies, by higher layer signaling, configuration information (for example, X0, X1, A0, A1, A2, A3, A4, A5, etc.) related to multiple modes of a resource region to which data is allocated. Base station 100 also selects one mode to use for data allocation from the multiple modes and notifies, by DCI, the selected one pattern. Terminal 200 identifies resources from the configuration information already notified by higher layer signaling, using parameters corresponding to the mode notified by DCI.

[0180] As a result, base station 100 can perform dynamic resource allocation that takes into account different uses for each slot by notifying terminal 200 of the Mode by DCI. Furthermore, when changing resource allocation, base station 100 only needs to notify the Mode by using DCI, and does not need to notify resources (for example, symbol start positions of data for each frequency domain) every time resource allocation is changed, thereby reducing the signaling overhead of DCI.

[0181] Furthermore, base station 100 can perform flexible data allocation that avoids resource regions that are not allocated to terminal 200 in each slot by selecting a mode according to resources (control resource set) in which a control signal channel is allocated.

[0182] Therefore, according to this embodiment, the data area (start position of data) can be appropriately notified in consideration of the area where the UL control signal is arranged, and resources can be flexibly allocated.

[0183] The embodiments of the present disclosure have been described above.

[0184] In the above embodiment, the case where the Mode is notified using one or two bits included in the DCI has been described, but the present invention is not limited to this, and the Mode may be notified using more than two bits included in the DCI. Furthermore, the number of Modes is not limited to two or four, and may be any other number.

[0185] In the above embodiment, physical mapping of the frequency domain (PRB#) has been described as an example, but logical mapping can also be applied. In the case of 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 arranged at physically separated positions, thereby obtaining a frequency diversity effect.

[0186] Furthermore, the DCI may be transmitted on a group common PDCCH, a PDCCH (UE-specific DCI) transmitted when data is allocated to terminal 200 (UE), or another PDCCH transmitted on a group common control resource set. When DCI is transmitted on a group common PDCCH, multiple terminals receive the same setting, thereby reducing overhead. When DCI is transmitted on an individual PDCCH, it can be individually configured for each terminal. Furthermore, DCI may be transmitted on other resources, not limited to the group common resource set and the UE specific control resource set.

[0187] The group common PDCCH may also be defined by a different name, such as a physical control format indicator channel (PCFICH), a physical slot format indicator channel (PSFICH), or a PDCCH type 0.

[0188] The group common control resource set may also be called a common control resource set, a group common search space, or a common search space. The control resource set may also be called a CORESET.

[0189] Furthermore, the higher layer signaling may be replaced with MAC signaling, which allows the frequency of changing the mode set for the UE to be increased compared to RRC signaling.

[0190] The present disclosure can be realized by software, hardware, or software in conjunction with hardware. Each functional block described in the above embodiments may be partially or entirely realized as an LSI, which is an integrated circuit. Each process described in the above embodiments may be partially or entirely controlled by a single LSI or a combination of LSIs. An LSI may be composed of individual chips, or a single chip containing some or all of the functional blocks. An LSI may have data inputs and outputs. Depending on the level of integration, an LSI may be referred to as an IC, system LSI, super LSI, or ultra LSI. The integration method is not limited to LSIs; it may also be realized by dedicated circuits, general-purpose processors, or dedicated processors. Furthermore, a field programmable gate array (FPGA), which can be programmed after LSI fabrication, or a reconfigurable processor, which allows the connections and settings of circuit cells within an LSI to be reconfigured, may also be used. The present disclosure may be realized as digital or analog processing. Furthermore, if an integrated circuit technology that can replace LSI emerges due to advances in semiconductor technology or other derivative technologies, it is natural that such technology can be used to integrate functional blocks. The application of biotechnology is also a possibility.

[0191] The base station of the present disclosure includes a circuit that selects one pattern to be used for data allocation from multiple patterns of resource regions to which data is allocated, and a transmitter that notifies configuration information regarding the multiple patterns by higher layer signaling and notifies the selected one pattern by a downlink control signal (DCI).

[0192] In the base station of the present disclosure, the configuration information indicates the start position of a time domain to which the downlink data is allocated.

[0193] In the base station of the present disclosure, the configuration information indicates a frequency domain to which a downlink control signal is assigned, a start position of a time domain to which the downlink data is assigned in the frequency domain, and a start position of a time domain to which the downlink data is assigned in a frequency domain other than the frequency domain.

[0194] In the base station of the present disclosure, the configuration information indicates a plurality of patterns of symbol configurations within a slot that is configured by downlink symbols, uplink symbols, or symbols used for other purposes.

[0195] In the base station of the present disclosure, the configuration information indicates multiple patterns of configurations of frequency bands used for the downlink, the uplink, or other uses within a slot.

[0196] In the base station of the present disclosure, the configuration information indicates a portion of a resource region within a slot, and the multiple patterns include a pattern in which the data is allocated to the portion of the resource region and a pattern in which the data is not allocated to the portion of the resource region.

[0197] In the base station of the present disclosure, the configuration information indicates the end position of a time domain to which the uplink data is allocated.

[0198] In the base station of the present disclosure, the configuration information indicates a frequency domain to which an uplink control signal is allocated, an end position of a time domain to which the uplink data is allocated in the frequency domain, and an end position of a time domain to which the uplink data is allocated in a frequency domain other than the frequency domain.

[0199] The terminal of the present disclosure includes a receiver that receives upper layer signaling including configuration information regarding multiple patterns of resource regions to which data is to be allocated, and receives a downlink control signal (DCI) that indicates one pattern to be used for data allocation from the multiple patterns, and a circuit that identifies the resource to which the data is to be allocated based on the configuration information and the downlink control signal.

[0200] The communication method disclosed herein selects one pattern to be used for data allocation from multiple patterns of resource regions to which data is allocated, notifies configuration information regarding the multiple patterns by higher layer signaling, and notifies the selected one pattern by a downlink control signal (DCI).

[0201] The communication method of the present disclosure receives upper layer signaling including configuration information regarding multiple patterns of resource regions to which data is to be allocated, receives downlink control signal (DCI) indicating one pattern to be used for data allocation from the multiple patterns, and determines the resources to which the data is to be allocated based on the configuration information and the downlink control signal. [Industrial Applicability]

[0202] One aspect of the present disclosure is useful in mobile communication systems. [Explanation of symbols]

[0203] 100 base stations 101 Setting section 102 DCI generation section 103,207 Error correction coding section 104,208 Modulation section 105,209 Signal allocation section 106,210 Transmitter 107,201 Receiver 108,202 Signal separation section 109,204 Demodulation section 110,205 Error correction decoding unit 200 devices 203 DCI receiver 206 Setting information receiving unit

Claims

1. a configuration unit configured to output higher layer signaling indicating four resource patterns for downlink data, each of the four resource patterns being indicated by a physical resource block and a symbol within a slot; a DCI generation unit that outputs a DCI including 2-bit information indicating a resource pattern selected from the four resource patterns; a transmitter that transmits the DCI in a control resource set allocated to a part of a frequency band; At least one of the four resource patterns for the downlink data indicates resources in the slot that are to be excluded from downlink data allocation. Control device.

2. outputting higher layer signaling indicating four resource patterns for downlink data, each of the four resource patterns being indicated by physical resource blocks and symbols within a slot; outputting a DCI including 2-bit information indicating a resource pattern selected from the four resource patterns; Transmitting the DCI in a control resource set allocated to a part of a frequency band; At least one of the four resource patterns for the downlink data indicates resources in the slot that are to be excluded from downlink data allocation. Communication method.

3. outputting higher layer signaling indicating four resource patterns for downlink data, each of the four resource patterns being indicated by a physical resource block and a symbol within a slot; outputting a DCI including 2-bit information indicating a resource pattern selected from the four resource patterns; transmitting the DCI in a control resource set allocated to a portion of a frequency band; At least one of the four resource patterns for the downlink data indicates resources in the slot that are to be excluded from downlink data allocation. Integrated circuit.

Images