WO2018030418A1 - ユーザ端末及び無線通信方法 - Google Patents
ユーザ端末及び無線通信方法 Download PDFInfo
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- WO2018030418A1 WO2018030418A1 PCT/JP2017/028802 JP2017028802W WO2018030418A1 WO 2018030418 A1 WO2018030418 A1 WO 2018030418A1 JP 2017028802 W JP2017028802 W JP 2017028802W WO 2018030418 A1 WO2018030418 A1 WO 2018030418A1
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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
- H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/0091—Signaling for the administration of the divided path
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L5/00—Arrangements affording multiple use of the transmission path
- H04L5/14—Two-way operation using the same type of signal, i.e. duplex
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
- H04W88/02—Terminal devices
Definitions
- the present invention relates to a user terminal and a wireless communication method in a next generation mobile communication system.
- LTE Long Term Evolution
- LTE-A also referred to as LTE Advanced, LTE Rel. 10, 11 or 12
- LTE has been specified for the purpose of further widening and speeding up from LTE (also referred to as LTE Rel. 8 or 9), and LTE.
- Successor systems for example, FRA (Future Radio Access), 5G (5th generation mobile communication system), NR (New Radio), NX (New radio access), FX (Future generation radio access), LTE Rel. 13, 14 or Also referred to as after 15).
- CA Carrier Aggregation
- CC Component Carrier
- UE User Equipment
- DC dual connectivity
- CG Cell Group
- CC cell
- Inter-eNB CA inter-base station CA
- LTE Rel. frequency division duplex (FDD) in which downlink (DL) transmission and uplink (UL: Uplink) transmission are performed in different frequency bands, and downlink transmission and uplink transmission are in the same frequency band.
- Time Division Duplex (TDD) which is performed by switching over time, is introduced.
- E-UTRA Evolved Universal Terrestrial Radio Access
- E-UTRAN Evolved Universal Terrestrial Radio Access Network
- Future wireless communication systems for example, 5G, NR are expected to realize various wireless communication services to meet different requirements (for example, ultra-high speed, large capacity, ultra-low delay, etc.) Yes.
- M2M may be referred to as D2D (Device To Device), V2V (Vehicle To Vehicle), or the like depending on a device to communicate.
- New RAT Radio Access Technology
- the present invention has been made in view of this point, and an object of the present invention is to provide a user terminal and a wireless communication method capable of suitably performing resource allocation even in broadband communication.
- a user terminal includes: a receiving unit that receives specific information for specifying a frequency offset of a radio resource with respect to a reference resource and / or an allocated resource amount of the radio resource; and And a control unit that determines assignment of radio resources.
- resource allocation can be suitably performed even in broadband communication.
- FIG. 5A and FIG. 5B are diagrams showing specific examples of allocation numbers that specify the frequency offset from the reference resource and the allocation resource amount.
- 6A and 6B are specific examples showing the relationship between an allocation number and an allocatable resource. It is a figure which shows an example of the decision rule of an allocation number. It is a table
- FIG. 9A is a diagram illustrating an allocation number determination rule according to one aspect
- FIG. 9B is a diagram illustrating an allocation number determination rule according to another example
- FIG. 10A is a diagram illustrating an example of an allocation number notification
- FIG. 10B is a table illustrating an example of a correspondence relationship between an allocation number and a bit sequence
- FIG. 11A is a diagram illustrating an example of an allocation number notified from a radio base station
- FIG. 11B is a diagram illustrating an example in which a user terminal identifies an allocation resource from the allocation number
- 12A is a diagram illustrating an example in which the resource allocation method illustrated in FIG. 10 is applied to a resource group (RG) in which a plurality of resources are bundled
- FIG. RG resource group
- FIG. 12B is an example of a correspondence relationship between RG numbers and bit sequences.
- FIG. 12C is a diagram illustrating an example of an RG number notified from the radio base station.
- FIG. 13A is a diagram illustrating an example in which an allocation number is notified without using a reserved bit sequence
- FIG. 13B is a table illustrating an example of a correspondence relationship between the allocation number and a bit sequence. It is a figure which shows an example of the resource allocation method which concerns on 2nd Embodiment.
- FIG. 15A and FIG. 15B are diagrams illustrating an example of a resource allocation method when allocation resources are limited.
- 16A is a table showing an example of the correspondence between the relative coordinates and the bit sequence in FIG. 15, and FIG.
- FIG. 16B is a table showing an example of the correspondence between the allocated resource amount and the bit sequence in FIG.
- FIG. 17A is a diagram illustrating an example of an allocation number notified from a radio base station when allocation resources are limited
- FIG. 17B is a diagram illustrating an example in which a user terminal identifies an allocation resource from the allocation number.
- FIG. 18A is a diagram illustrating another example of a resource allocation method when allocation resources are limited
- FIG. 18B is a table illustrating an example of a correspondence relationship between allocation numbers and bit sequences. It is a figure which shows an example which notifies the zone
- 3rd Embodiment selection method of a reference
- FIG. 21A is a diagram illustrating another example of the reference resource selection method
- FIG. 21B is a table illustrating an example of a correspondence relationship between resource numbers of candidate reference resources and notification information. It is a figure which shows an example of the resource allocation method which concerns on 4th Embodiment. It is a figure which shows another example of the resource allocation method which concerns on 4th Embodiment. It is a figure which shows the other specific example of FIG.
- FIG. 25A shows a diagram before rearranging resources
- FIG. 25B shows an example of rearrangement of resource numbers
- FIG. 25C shows a diagram after rearranging resources. It is a figure which shows an example which applied this invention to expansion of the system bandwidth. It is a figure which shows the other example of FIG.
- the number of bits of an allocation field for allocating radio resources used for signal transmission / reception included in downlink control information is expressed as a function of the system bandwidth.
- DCI downlink control information
- P indicates the size of the resource block group
- NRB indicates the system bandwidth.
- the present inventors have conceived that resource allocation is notified with a smaller amount of information compared to the existing notification method depending on the system bandwidth.
- FIG. 1 is a diagram showing an outline of a resource allocation method according to an aspect of the present invention.
- the radio base station selects a predetermined reference resource within the system band.
- the radio base station as specific information for specifying the radio resource to be allocated, the relative coordinates in the frequency direction from the reference resource to the radio resource to be allocated (+4 in FIG. 1) and the allocated resource amount (in FIG. 1). 3) to the user terminal.
- the relative coordinates in the frequency direction of the radio resource with respect to the reference resource may be referred to as an allocation resource start position, a frequency offset, or the like.
- a user terminal determines radio resource allocation based on specific information for specifying a relative coordinate in a frequency direction of a radio resource with respect to a reference resource and / or an allocation resource amount of the radio resource. To do.
- the number of bits of resource allocation control information can be determined regardless of the system bandwidth. Therefore, even in broadband communication such as 5G, an increase in the number of bits of control information can be suppressed, and resource allocation can be suitably performed without reducing the throughput.
- the wireless communication method according to each embodiment may be applied independently or in combination.
- the specific information may be included in downlink control information (DCI), or may be other information that is dynamically notified.
- DCI downlink control information
- FIG. 2 is a diagram illustrating an example of a resource allocation method according to the first embodiment.
- the entire system band is set to a band in which resources can be dynamically allocated without limiting the allocated resources.
- the first embodiment can be further divided roughly according to the contents of the specific information and the notification method described above (embodiments 1.1-1.2).
- FIG. 3 is a diagram illustrating relative coordinates from the reference resource.
- the user terminal is notified of the relative coordinates in the frequency direction of the radio resource with respect to the reference resource (hereinafter simply referred to as relative coordinates) and the allocated resource amount. That is, in the embodiment 1.1, the relative coordinate information and the allocated resource amount information are specific information.
- relative coordinates will be described. For example, as shown in FIG. 3, a case is considered where the total resource block number NRB is 15 in the system band and the central radio resource in the system band is selected as the reference resource.
- the relative coordinates and the allocated resource amount are expressed in resource block (RB) units, the present invention is not limited thereto.
- the relative coordinate mentioned above shall show the same meaning also in other embodiment.
- the radio base station since the user terminal can specify all radio resources in the system band using the relative coordinates and the allocated resource amount, the radio base station transmits all radio resources in the system band to the user terminal. Can be assigned dynamically.
- Embodiment 1.1 by performing resource allocation based on the specific information described above, it is possible to perform resource allocation with a smaller amount of information than existing notification methods depending on the system bandwidth.
- the user terminal may not be notified of both the relative coordinates and the allocated resource amount as the specific information.
- the allocated resource amount includes upper layer signaling (for example, RRC (Radio Resource Control) signaling, broadcast information (master information block (MIB), system information block, etc.)), MAC (Medium Access Control) signaling), or may be determined in advance by specifications.
- RRC Radio Resource Control
- MIB master information block
- MAC Medium Access Control
- Embodiment 1.2 Next, Embodiment 1.2 will be described.
- the allocation number determined (numbered or assigned) according to a predetermined rule is notified to the user terminal as specific information for specifying the relative coordinates from the reference resource and the allocated resource amount.
- FIG. 4 is a diagram illustrating an example of an allocation number that specifies relative coordinates from the reference resource and an allocated resource amount.
- the allocation number determination rule will be described later.
- FIG. 5A and FIG. 5B are diagrams showing specific examples of allocation numbers that specify the frequency offset from the reference resource and the allocation resource amount.
- allocation numbers 0 to 14 are determined starting from the reference resource.
- the user terminal is notified of the allocation number with 3 bits (“100”).
- the position of the resource corresponding to the allocation number 0 that descends from the position of the allocation number 4 to the bottom in the lower left direction is the relative coordinate. That is, the relative coordinate of allocation number 4 is “0”.
- the user terminal is notified of the allocation number with 4 bits (“1110”).
- the position of allocation number 6 that descends from the position of allocation number 14 in the lower left direction to the bottom is the relative coordinate. That is, the relative coordinate of the allocation number 4 is “ ⁇ 2”.
- the total number of allocation numbers arranged at triangular lattice points as described in FIG. 5 is represented by X (X + 1) / 2 where X is the range of allocatable resources.
- X is the range of allocatable resources.
- 6A and 6B are specific examples showing the relationship between an allocation number and an allocatable resource.
- the range of the allocatable resource amount is “3”. Therefore, the total number of allocation numbers is 6, and allocation resources can be specified by allocating allocation numbers 0 to 5 starting from the reference resource. In this case, a triangular lattice having an allocation number having the allocation number 5 as a vertex is formed.
- the range of the allocatable resource amount is “5”. Therefore, the total number of allocation numbers is 15, and allocation resources can be specified by allocating allocation numbers 0 to 14 starting from the reference resource. In this case, a triangular lattice having an allocation number having the allocation number 14 as a vertex is formed. As described above, a larger number of allocation numbers is required as the range of resources that can be allocated is expanded.
- FIG. 7 is a diagram illustrating an example of an assignment number determination rule.
- FIG. 8 is a table showing an example of allocation numbers for each Tier.
- FIG. 9A is a diagram illustrating an allocation number determination rule according to one aspect
- FIG. 9B is a diagram illustrating an allocation number determination rule according to another example.
- allocation numbers from 0 to 27 are determined starting from the reference resource.
- a triangular lattice having a plurality of radio resources arranged in the frequency direction as one side is formed by the assignment numbers 0 to 27.
- This triangular lattice is formed symmetrically in the frequency direction with the allocation number 27 as a vertex and the line connecting the allocation numbers 0 and 27 as an axis.
- this triangular lattice has a hierarchical structure centered on the allocation number 0. Specifically, on the basis of the table shown in FIG. 8, a plurality of mountain-shaped layers (Tiers) are formed as they are separated from the reference resource in the frequency direction.
- Tiers mountain-shaped layers
- the allocation numbers 0 to 27 are determined by dividing them into a total of four layers. Specifically, the allocation number 0 belongs to the 0th Tier, the allocation numbers 1 to 5 belong to the 1st Tier, the allocation numbers 6 to 14 belong to the 2nd Tier, and the allocation numbers 15 to 27 belong to the 3rd Tier.
- FIG. 9 the allocation number determination rule in the second tier of FIG. 7 will be described.
- the lowest point at the lower left of the triangular lattice is the starting point n of the allocation number, and the opposing position across the center (reference resource) of the allocation number is incremented to n + 1.
- n + 1 the position immediately above n opposite to the center of the assigned number is incremented to n + 2. This is repeated toward the apex of the triangular lattice to determine the allocation number.
- FIG. 9A allocation numbers n to n + 8 are determined.
- the lowest point of the triangular lattice is the starting point n of the allocation number
- the allocation number is incremented toward the vertex (n to n + 4)
- the center of the allocation number is determined from the vertex position.
- the allocation number is determined by incrementing the allocation number (n + 5 to n + 8) toward the lowest point of the triangular lattice facing each other.
- allocation numbers n to n + 8 are determined. Note that the allocation number determination rule shown in FIG. 9 is merely an example, and the allocation number determination rule is not limited thereto.
- FIG. 10A is a diagram showing an example of notification of allocation numbers
- FIG. 10B is a table showing the correspondence between allocation numbers and bit sequences.
- FIG. 11A is a diagram illustrating an example of an allocation number notified from a radio base station
- FIG. 11B is a diagram illustrating an example in which a user terminal identifies an allocation resource from the allocation number.
- the allocation number is transmitted to the user terminal with a bit number that is an integer multiple of a specific number, and a specific bit sequence is transmitted after the allocation number. That is, the user terminal receives a bit sequence including a specific bit sequence at the end.
- the specific bit sequence means that the bit sequence transmitted immediately before the specific bit sequence is a bit sequence corresponding to the allocation number (a bit sequence other than the specific bit sequence is the allocation number). This is a bit sequence for causing a user terminal to make a determination.
- the specific bit sequence may be referred to as a reserved bit sequence.
- the bit sequence corresponding to the allocation number is composed of an integer multiple (2 times) of 4 bits.
- the reserved bit sequence is composed of 4 bits.
- a reserved bit sequence (Reserved) can be represented by “1111”. Note that the reserved bit series is not “1111” but may be other bit series.
- the allocation number is 0 to 14
- the allocation number is 15 to 29, it is possible to notify the user terminal of resource allocation with a total of 12 bits of the bit sequence (8 bits) + reserved bit sequence (4 bits) corresponding to the allocation number. . Even if the allocation number is a larger value, notification can be made in the same manner.
- the user terminal determines that the bit sequence “1110” immediately before the reserved bit sequence is the radio resource allocation number. Can do. That is, it can be determined that the allocation number is “14”.
- the user terminal can determine that the relative coordinate in the frequency direction of the allocation resource with respect to the reference resource is “ ⁇ 2” and the allocation resource amount is “5”. .
- the specific bit sequence is transmitted after the bit sequence of the allocation number, so that the user terminal can determine the allocation number even if the number of notification bits is variable according to the size of the allocation number.
- the above-mentioned “specific number” and “specific bit sequence” may be determined by the specification, or notified to the user terminal by upper layer signaling, physical layer signaling (for example, DCI) or a combination thereof. Also good.
- the embodiment 1.2 it is possible to notify specific information (allocation number) related to radio resource allocation with the number of bits of the allocation number independent of the system bandwidth.
- FIG. 12A is a diagram illustrating an example in which the resource allocation method illustrated in FIG. 10 is applied to a resource group (RG: Resource Group) in which a plurality of resources are bundled.
- FIG. 12B is a table showing an example of a correspondence relationship between RG numbers and bit sequences
- FIG. 12C is a diagram showing an example of RG numbers notified from a radio base station.
- FIG. 12 shows an example in which the allocation number in the embodiment 1.2 is replaced with a resource group number (RG number). That is, in FIG. 12, the RG number is the specific information.
- the resource group may be the same as a resource block group (RBG) defined in the existing LTE system, or may be a group of different units.
- RBG resource block group
- RG resource groups in which five radio resources are bundled are arranged side by side in the frequency direction.
- the central RG in the frequency direction is RG # 0
- RGs larger in the frequency direction than RG # 0 are RG # + 1 and RG # + 2 in order from the smallest.
- RGs smaller in the frequency direction than RG # 0 are set to RG # -2 and RG # -1 in order from the smallest.
- the central radio resource of RG # 0 is selected as the reference resource.
- the RG number can be composed of at least 2 bits.
- the reserved bit sequence can be represented by “11”. Note that the bit sequence indicating the RG number is not limited to 2 bits, and can be appropriately changed according to the number of RGs.
- a predetermined bit sequence “0111” is notified from the radio base station to the user terminal.
- the user terminal can determine the bit sequence “01” immediately before the received reserved bit sequence “11” as the RG number based on the correspondence relationship in FIG. 12B.
- the user terminal can determine the RG number and resource allocation. Note that as the allocated radio resource is closer to the reference resource (the smaller the RG number), the information (RG number) related to the allocation of the radio resource can be notified with a smaller number of bits.
- the user terminal may estimate the bit sequence specifying the allocation number or RG number by measuring the received power without using the reserved bit sequence.
- FIG. 13A is a diagram showing an example in which an allocation number is notified without using a reserved bit sequence
- FIG. 13B is a table showing an example of a correspondence relationship between the allocation number and a bit sequence.
- a case is considered in which nothing is transmitted after the bit sequence corresponding to the allocation number. 10 and 11, the reserved bit sequence is represented by “1111”.
- the allocation number 15 can be represented by “1111” instead. (See FIG. 13B).
- “1110” is transmitted from the radio base station to the user terminal as a bit sequence corresponding to the assigned number, and nothing is transmitted thereafter.
- the user terminal measures the received power and observes that there is a section in which nothing is transmitted.
- the user terminal can determine the bit sequence immediately before the interval in which nothing is transmitted as the allocation number. That is, it can be determined that the allocation number is “14”. In this way, redundant bits for causing the user terminal to determine the allocation number are not necessary, and communication efficiency can be improved.
- FIG. 13 illustrates the case where the user terminal receives the allocation number as information for specifying the relative coordinates of the radio resource and the allocated resource amount, but is not limited thereto.
- the present invention is also applicable when the user terminal receives an RG number as information for specifying the relative coordinates of the radio resource and the allocated resource amount.
- FIG. 14 is a diagram illustrating an example of a resource allocation method according to the second embodiment.
- the entire system band is dynamically allocated without limiting the allocated resources.
- the radio base station can dynamically allocate a specific radio resource in the system band to the user terminal.
- the second embodiment can be further broadly classified according to the content of the specific information and the notification method described above (embodiment 2.1-2.3).
- FIG. 15A and FIG. 15B are diagrams illustrating an example of a resource allocation method when allocation resources are limited.
- 16A is a table showing an example of the correspondence between the relative coordinates and the bit sequence in FIG. 15, and
- FIG. 16B is a table showing an example of the correspondence between the allocated resource amount and the bit sequence in FIG.
- the number of bits of specific information (relative coordinates of radio resources and / or information of allocated resource amount) related to resource allocation is set in advance in the user terminal by higher layer signaling (eg, RRC signaling, system information, etc.). Be notified.
- the user terminal receives and decodes physical layer control information (for example, DCI) using the notified number of bits. That is, the user terminal can acquire information on relative coordinates and / or information on the allocated resource amount included in the physical layer control information based on the notified number of bits.
- the relative coordinates are notified in 2 bits, and the allocated resource amount is notified in 2 bits.
- the relative coordinates are represented by four patterns of “0”, “+1”, “ ⁇ 1”, and “+2”.
- the allocated resource amount is represented by four patterns 1 to 4 as shown in FIG. 16B.
- the user terminal can determine that the relative coordinates from the reference lease are “+2” and the allocated resource amount is “3”.
- the user terminal When the relative coordinates are notified by the bit sequence “10” and the allocated resource amount is notified by the bit sequence “10”, the user terminal indicates that the relative coordinates from the reference lease is “ ⁇ 1” as shown in FIG. 15B. It can be determined that the allocated resource amount is “3”.
- the correspondence shown in FIGS. 16A and 16B is an example, and is not limited thereto.
- information on the correspondence between the relative coordinates and the bit sequence, the correspondence between the allocated resource amount and the bit sequence, and the like may be notified to the UE by, for example, higher layer signaling.
- the UE may update the correspondence relationship based on the notified information.
- the number of bits to be notified in advance is not limited to 2 bits, and can be changed as appropriate.
- FIG. 17A is a diagram illustrating an example of an allocation number notified from a radio base station when allocation resources are limited
- FIG. 17B is a diagram illustrating an example in which a user terminal identifies an allocation resource from the allocation number.
- FIG. 18A is a diagram illustrating another example of a resource allocation method when allocation resources are limited
- FIG. 18B is a table illustrating an example of a correspondence relationship between allocation numbers and bit sequences.
- the number of bits of the specific information is notified in advance by higher layer signaling (for example, RRC signaling, system information, etc.), and the relative coordinates of the radio resource and the assigned resource amount are determined by the bits.
- the assigned number to be identified is notified to the user terminal.
- the user terminal is notified in advance that the number of bits of the allocation number is 4 bits.
- the user terminal knows that the allocation number is transmitted with 4 bits.
- the bit sequence “1110” can be determined as a radio resource allocation number. That is, it can be determined that the allocation number is “14”.
- the user terminal can determine that the relative coordinate in the frequency direction of the allocated resource with respect to the reference resource is “ ⁇ 2” and the allocated resource amount is “5”. .
- the allocation number it is possible to appropriately determine the allocation number by notifying the user terminal of the number of bits of the allocation number in advance.
- the allocation number may be determined based on the correspondence relationship including the reserved bit sequence as shown in FIG. 10B, or it is assumed that there is no reserved bit sequence as shown in FIG. You may judge.
- the reserved bit sequence is not used, and therefore the allocation number 15 is represented by “1111” as in FIG. 13B (see FIG. 18B).
- the bit sequence “1101” can be determined as a radio resource allocation number. That is, it can be determined that the allocation number is “13”.
- the user terminal can determine that the relative coordinate in the frequency direction of the allocation resource with respect to the reference resource is “ ⁇ 1” and the allocation resource amount is “4”. . In this case, the overhead of reserved bits is eliminated, so that communication efficiency can be improved.
- FIG. 19 is a diagram illustrating an example of notifying a band in which resources can be allocated.
- a band to which resources can be allocated is notified by higher layer signaling (for example, RRC signaling, system information, etc.).
- the user terminal can estimate the number of bits of the specific information notified by the physical layer control information using the notified bandwidth information.
- N left a predetermined number of resources that is small in the frequency direction with respect to the reference resource
- N right a predetermined number of resources that is large in the frequency direction with respect to the reference resource
- the radio base station may notify the user terminal of the N all calculated by the above equation (3) when notifying the band (N all ) in which resources can be allocated.
- N left and N right may be set independently to notify the user terminal of each information.
- N all corresponds to N RB in Equation (1) or Equation (2).
- FIG. 20 is a diagram illustrating an example of a reference resource selection method (third embodiment).
- the reference resource is selected according to a predetermined rule.
- the reference resource is selected according to at least one of the following three rules.
- the user terminal sets a radio resource that receives a predetermined signal such as a synchronization signal (SS) as a reference resource.
- a predetermined signal such as a synchronization signal (SS)
- SS synchronization signal
- the user terminal sets a radio resource that has received a predetermined signal such as SS according to the rule (1) as a reference resource.
- a predetermined signal such as SS according to the rule (1)
- the user terminal transmits a radio resource having a relative coordinate of “10”. To the new reference resource.
- the user terminal sets a radio resource with relative coordinates “5” as a new reference resource.
- a radio resource that receives a predetermined signal may be a radio resource (PRB: Physical RB) including a DC-SC (Direct Current Sub-Carrier).
- PRB Physical RB
- DC-SC Direct Current Sub-Carrier
- FIG. 21A is a diagram illustrating another example of the reference resource selection method
- FIG. 21B is a table illustrating an example of a correspondence relationship between resource numbers of candidate reference resources and notification information.
- a reference resource is selected by selecting a radio resource specified by predetermined notification information from a plurality of limited reference resource candidates.
- the reference resource candidates may be set in an upper layer, or may be set in accordance with a predetermined rule.
- the notification information may be notified by physical layer signaling (for example, DCI) or may be notified by higher layer signaling.
- reference resource candidates are set at predetermined resource number intervals (coordinate intervals) with reference to a radio resource that receives a predetermined signal.
- reference resource candidates are set at intervals of four resource numbers.
- the correspondence between the resource number of the reference resource candidate and the notification information (candidate number) is as shown in FIG. 21B.
- the radio resource with the resource number “4” is associated with “1” as notification information.
- the user terminal sets the radio resource having the resource number “8” among the reference resource candidates as the reference resource.
- the predetermined resource number interval may be determined by specifications, or may be notified from the radio base station to the user terminal by higher layer signaling (for example, RRC signaling, system information, etc.).
- the downlink is described as an example, but the present invention can also be applied to the uplink.
- the user terminal may select (1) a radio resource (PRB) including the center frequency of the system band as a reference resource, and (2) a random access channel (PRACH: Physical Random Access Channel)
- PRB radio resource
- PRACH Physical Random Access Channel
- a transmission resource central resource (PRB) may be selected, or (3) a resource (PRB) having the same resource number as a DL reference resource may be selected.
- the PRACH resource can be recognized by broadcast information or the like.
- the user terminal may select a reference resource according to a predetermined rule, or may select a resource designated by a radio base station.
- the user terminal can transmit data, control information, and the like using the allocated radio resource.
- Embodiment 4.1 is described with reference to FIG. It is a figure which shows an example of the resource allocation method which concerns on 4th Embodiment.
- Embodiment 4.1 resource allocation using radio resources arranged at intervals, that is, interlaced resource allocation will be described.
- a total of five interlace allocation resources are set for every four resource number intervals (with an interlace interval of 3).
- the radio base station notifies the user terminal of the relative coordinates and the interlace bandwidth, and the user terminal determines the allocation resource based on the relative coordinates and the interlace bandwidth.
- (1) the relative coordinates (“7” in FIG. 22) of the interlace allocation resource closest to the reference resource can be notified to the user terminal.
- (2) relative coordinates (“15” in FIG. 22) of the interlace allocated resource located at the center in the interlace band may be notified to the user terminal.
- either the relative coordinate (1) or the relative coordinate (2) may be notified, or both (1) and (2) may be notified.
- (1) the total number of radio resources included in the interlace bandwidth (“17” in FIG. 22) can be notified to the user terminal.
- (2) the total number of interlace allocation resources included in the interlace bandwidth (“5” in FIG. 22) may be notified to the user terminal. In this case, either one of (1) and (2) may be notified, or both (1) and (2) may be notified.
- the allocation resource based on the relative coordinates and the interlace bandwidth.
- the user terminal performs reception and decoding processing on the assumption that data is transmitted using the assigned radio resource.
- the relative coordinates from the reference resource and the interlace bandwidth may be set according to a predetermined rule, may be notified by an upper layer, or may be notified from a plurality of candidates by physical layer control information. May be instructed.
- the user terminal may assume that the number of transmission bits differs depending on the notified value.
- FIG. 23 is a diagram illustrating another example of the resource allocation method according to the fourth embodiment.
- FIG. 24 is a diagram showing another specific example of FIG.
- an interlace interval (may be referred to as a cluster interval), a cluster size, and a cluster number are notified.
- a plurality of interlace allocation resources having a predetermined cluster size are set at a predetermined interlace interval (cluster interval).
- a plurality of consecutive interlace allocation resources are collectively referred to as “cluster (interlace cluster)”.
- the cluster size is 2 (that is, the number of consecutive interlace allocation resources is 2)
- the interlace interval is 2 (that is, the cluster interval is 1)
- the total number of interlace allocation resources is 10 (that is, the interlace cluster).
- the number is set to 5).
- two adjacent interlace allocation resources are set as cluster number # 1
- two adjacent radio resources constituting the interlace interval are set as cluster number # 2.
- the cluster size is set to 2 and the interlace interval is set to 4 (that is, the cluster interval is 2).
- two adjacent interlace allocation resources are set as cluster number # 1.
- the interlace bandwidth can be specified.
- the total number of radio resources included in the interlace bandwidth (“20” in FIG. 22) can be notified to the user terminal.
- (2) the total number of interlace allocation resources included in the interlace band (“10” in FIG. 23) may be notified to the user terminal.
- (3) the total number of interlace clusters included in the interlace band (“5” in FIG. 23) may be notified to the user terminal.
- any one of (1)-(3) may be notified, two of (1)-(3), or all of (1)-(3) may be notified.
- the cluster size (“2” in FIG. 23), the cluster number (“# 1” or “# 2” in FIG. 23), and the like may be further notified.
- the allocation resource based on the relative coordinates and the interlace bandwidth.
- the relative coordinates and the interlace bandwidth from the reference resource may be set according to a predetermined rule, may be notified by an upper layer, or may be indicated by physical layer control information from a plurality of candidates, as in the embodiment 4.1. May be.
- the interlace interval and the cluster size may be notified by system information such as broadcast information.
- the cluster number may also be notified in the same manner as in Embodiment 4.1.
- the cluster number may be notified to the user terminal by one value, and the user terminal is notified by a bitmap (0 or 1) whether to allocate to a plurality of resource candidates previously notified by the upper layer. May be.
- a bitmap a plurality of cluster numbers can be assigned to user terminals.
- cluster number may be read as “interlace number” for specifying an interlace.
- the interlaced allocation method described in the fourth embodiment and the allocation method described in the first and second embodiments may be used as the upper layer control information. It is possible to switch based on
- the user terminal may report capability information (Capability) on whether to support interlaced allocation to the radio base station. Further, when the user terminal does not receive the upper layer control information, the user terminal can determine that the local type assignment is set.
- Capability capability information
- the user terminal can determine that the local type assignment is set.
- the user terminal determines the radio resource allocation based on the relative coordinates in the frequency direction of the radio resource with respect to the reference resource and the allocated resource amount of the radio resource, so that the user terminal is independent of the system bandwidth.
- the number of bits of resource allocation control information can be determined.
- resource allocation can be suitably performed even in broadband communication as assumed in 5G.
- FIG. 25A shows a diagram before rearranging resources
- FIG. 25B shows an example of rearrangement of resource numbers
- FIG. 25C shows a diagram after rearranging resources.
- allocation resource or “resource number (relative coordinates)” may be allocated to an actual resource, or may differ from the actual depending on rearrangement processing (interleaving, hopping, virtual allocation, etc.) You may allocate to a radio
- FIG. 25A an example in which the relative coordinate is “3” and the allocated resource amount is “3” with respect to the reference resource is taken as an example.
- the allocated resources can be rearranged (distributed and allocated) as shown in FIG. 25C.
- virtual resource numbers arranged in ascending order from 0 to 15 are 0, 4, 1, 5, 2, 6, 3, 7, 8, 12, 9, 13, 10, 14, 11, It is rearranged in the order of 15.
- the frequency diversity effect can be obtained by applying the resource rearrangement.
- FIG. 26 is a diagram showing an example in which the present invention is applied to expansion of the system bandwidth.
- FIG. 27 is a diagram illustrating another example of FIG.
- the bandwidth that can be notified of resource allocation is defined as the dynamic system bandwidth with reference to the reference resource.
- the system bandwidth is dynamically expanded as the number of bits of notification becomes larger (for example, 4 bits or 8 bits) than the system bandwidth in the case where resource allocation is notified by 2 bits.
- the reference resource may be located at the center of the dynamic system bandwidth, or may be offset by a predetermined amount from the center of the dynamic system bandwidth as shown in FIG. In this case, it is conceivable that the relative coordinates (frequency offset) from the reference resource to the center of the dynamic system bandwidth are notified by higher layer signaling or determined in advance by specifications.
- the reference resource may be located outside the dynamic system bandwidth (outside the minimum end (left end) or the maximum end (right end) in the frequency direction of the dynamic system bandwidth).
- the relative coordinates (frequency offset) from the reference resource to the end (left end or right end) of the dynamic system bandwidth may be notified by higher layer signaling or may be determined in advance by specifications.
- wireless communication system Wireless communication system
- communication is performed using any one or a combination of the wireless communication methods according to the above embodiments of the present invention.
- FIG. 28 is a diagram illustrating an example of a schematic configuration of a wireless communication system according to an embodiment of the present invention.
- carrier aggregation (CA) and / or dual connectivity (DC) in which a plurality of basic frequency blocks (component carriers) each having a system bandwidth (for example, 20 MHz) of the LTE system as one unit are applied. can do.
- DC dual connectivity
- the wireless communication system 1 includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced 4G (4th generation mobile communication system), 5G. (5th generation mobile communication system), FRA (Future Radio Access), New-RAT (Radio Access Technology), etc., or a system that realizes these.
- LTE Long Term Evolution
- LTE-A Long Term Evolution-Advanced
- LTE-B LTE-Beyond
- SUPER 3G IMT-Advanced 4G (4th generation mobile communication system)
- 5G. 5th generation mobile communication system
- FRA Full Radio Access
- New-RAT Radio Access Technology
- the radio communication system 1 includes a radio base station 11 that forms a macro cell C1 having a relatively wide coverage, and a radio base station 12 (12a-12c) that is arranged in the macro cell C1 and forms a small cell C2 that is narrower than the macro cell C1. It is equipped with. Moreover, the user terminal 20 is arrange
- the user terminal 20 can be connected to both the radio base station 11 and the radio base station 12. It is assumed that the user terminal 20 uses the macro cell C1 and the small cell C2 simultaneously by CA or DC. Moreover, the user terminal 20 may apply CA or DC using a plurality of cells (CC) (for example, 5 or less CCs, 6 or more CCs).
- CC cells
- Communication between the user terminal 20 and the radio base station 11 can be performed using a carrier having a relatively low frequency band (for example, 2 GHz) and a narrow bandwidth (also referred to as an existing carrier or a legacy carrier).
- a carrier having a relatively high frequency band for example, 3.5 GHz, 5 GHz, etc.
- the same carrier may be used.
- the configuration of the frequency band used by each radio base station is not limited to this.
- a wired connection for example, an optical fiber compliant with CPRI (Common Public Radio Interface), an X2 interface, etc.
- a wireless connection It can be set as the structure to do.
- the radio base station 11 and each radio base station 12 are connected to the higher station apparatus 30 and connected to the core network 40 via the higher station apparatus 30.
- the upper station device 30 includes, for example, an access gateway device, a radio network controller (RNC), a mobility management entity (MME), and the like, but is not limited thereto.
- RNC radio network controller
- MME mobility management entity
- Each radio base station 12 may be connected to the higher station apparatus 30 via the radio base station 11.
- the radio base station 11 is a radio base station having a relatively wide coverage, and may be called a macro base station, an aggregation node, an eNB (eNodeB), a transmission / reception point, or the like.
- the radio base station 12 is a radio base station having local coverage, and includes a small base station, a micro base station, a pico base station, a femto base station, a HeNB (Home eNodeB), an RRH (Remote Radio Head), and transmission / reception. It may be called a point.
- the radio base stations 11 and 12 are not distinguished, they are collectively referred to as a radio base station 10.
- Each user terminal 20 is a terminal that supports various communication schemes such as LTE and LTE-A, and may include not only a mobile communication terminal (mobile station) but also a fixed communication terminal (fixed station).
- orthogonal frequency division multiple access (OFDMA) is applied to the downlink, and single carrier-frequency division multiple access (SC-FDMA) is used for the uplink.
- SC-FDMA single carrier-frequency division multiple access
- OFDMA is a multi-carrier transmission scheme that performs communication by dividing a frequency band into a plurality of narrow frequency bands (subcarriers) and mapping data to each subcarrier.
- SC-FDMA is a single-carrier transmission scheme that reduces interference between terminals by dividing the system bandwidth into bands consisting of one or continuous resource blocks for each terminal and using a plurality of terminals with mutually different bands. is there.
- the uplink and downlink radio access schemes are not limited to these combinations, and other radio access schemes may be used.
- downlink channels include a downlink shared channel (PDSCH) shared by each user terminal 20, a broadcast channel (PBCH: Physical Broadcast Channel), a downlink L1 / L2 control channel, and the like. Used. User data, higher layer control information, SIB (System Information Block), etc. are transmitted by PDSCH. Also, MIB (Master Information Block) is transmitted by PBCH.
- PDSCH downlink shared channel
- PBCH Physical Broadcast Channel
- SIB System Information Block
- MIB Master Information Block
- Downlink L1 / L2 control channels include PDCCH (Physical Downlink Control Channel), EPDCCH (Enhanced Physical Downlink Control Channel), PCFICH (Physical Control Format Indicator Channel), PHICH (Physical Hybrid-ARQ Indicator Channel), and the like.
- Downlink control information (DCI: Downlink Control Information) including scheduling information of PDSCH and PUSCH is transmitted by PDCCH.
- the number of OFDM symbols used for PDCCH is transmitted by PCFICH.
- the PHICH transmits HARQ (Hybrid Automatic Repeat reQuest) acknowledgment information (for example, retransmission control information, HARQ-ACK, ACK / NACK, etc.) to the PUSCH.
- HARQ Hybrid Automatic Repeat reQuest
- EPDCCH is frequency-division multiplexed with PDSCH (downlink shared data channel), and is used for transmission of DCI and the like in the same manner as PDCCH.
- an uplink shared channel (PUSCH) shared by each user terminal 20
- an uplink control channel (PUCCH: Physical Uplink Control Channel)
- a random access channel (PRACH: Physical Random Access Channel)
- User data, higher layer control information, etc. are transmitted by PUSCH.
- downlink radio quality information (CQI: Channel Quality Indicator), delivery confirmation information, and the like are transmitted by PUCCH.
- CQI Channel Quality Indicator
- delivery confirmation information and the like are transmitted by PUCCH.
- a random access preamble for establishing connection with a cell is transmitted by the PRACH.
- a cell-specific reference signal CRS
- CSI-RS channel state information reference signal
- DMRS demodulation reference signal
- PRS Positioning Reference Signal
- a measurement reference signal SRS: Sounding Reference Signal
- a demodulation reference signal DMRS
- the DMRS may be referred to as a user terminal specific reference signal (UE-specific Reference Signal). Further, the transmitted reference signal is not limited to these.
- FIG. 29 is a diagram illustrating an example of an overall configuration of a radio base station according to an embodiment of the present invention.
- the radio base station 10 includes a plurality of transmission / reception antennas 101, an amplifier unit 102, a transmission / reception unit 103, a baseband signal processing unit 104, a call processing unit 105, and a transmission path interface 106.
- the transmission / reception antenna 101, the amplifier unit 102, and the transmission / reception unit 103 may each be configured to include one or more.
- User data transmitted from the radio base station 10 to the user terminal 20 via the downlink is input from the higher station apparatus 30 to the baseband signal processing unit 104 via the transmission path interface 106.
- PDCP Packet Data Convergence Protocol
- RLC Radio Link Control
- MAC Medium Access
- Retransmission control for example, HARQ transmission processing
- scheduling transmission format selection, channel coding, Inverse Fast Fourier Transform (IFFT) processing, precoding processing, and other transmission processing
- IFFT Inverse Fast Fourier Transform
- precoding processing precoding processing, and other transmission processing
- the downlink control signal is also subjected to transmission processing such as channel coding and inverse fast Fourier transform, and is transferred to the transmission / reception unit 103.
- the transmission / reception unit 103 converts the baseband signal output by precoding for each antenna from the baseband signal processing unit 104 to a radio frequency band and transmits the converted signal.
- the radio frequency signal frequency-converted by the transmission / reception unit 103 is amplified by the amplifier unit 102 and transmitted from the transmission / reception antenna 101.
- the transmission / reception unit 103 can be configured by a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device, which is described based on common recognition in the technical field according to the present invention.
- the transmission / reception part 103 may be comprised as an integral transmission / reception part, and may be comprised from a transmission part and a receiving part.
- the radio frequency signal received by the transmission / reception antenna 101 is amplified by the amplifier unit 102.
- the transmission / reception unit 103 receives the uplink signal amplified by the amplifier unit 102.
- the transmission / reception unit 103 converts the frequency of the received signal into a baseband signal and outputs it to the baseband signal processing unit 104.
- the baseband signal processing unit 104 performs fast Fourier transform (FFT) processing, inverse discrete Fourier transform (IDFT: Inverse Discrete Fourier Transform) processing, and error correction on user data included in the input upstream signal.
- FFT fast Fourier transform
- IDFT inverse discrete Fourier transform
- Decoding, MAC retransmission control reception processing, RLC layer and PDCP layer reception processing are performed and transferred to the upper station apparatus 30 via the transmission path interface 106.
- the call processor 105 performs communication channel call processing (setting, release, etc.), status management of the radio base station 10, radio resource management, and the like.
- the transmission path interface 106 transmits and receives signals to and from the higher station apparatus 30 via a predetermined interface.
- the transmission path interface 106 transmits / receives signals (backhaul signaling) to / from other radio base stations 10 via an interface between base stations (for example, an optical fiber compliant with CPRI (Common Public Radio Interface), X2 interface). May be.
- CPRI Common Public Radio Interface
- X2 interface May be.
- the transmission / reception unit 103 may further include an analog beam forming unit that performs analog beam forming.
- the analog beam forming unit includes an analog beam forming circuit (for example, phase shifter, phase shift circuit) or an analog beam forming apparatus (for example, phase shifter) described based on common recognition in the technical field according to the present invention. can do.
- the transmission / reception antenna 101 can be configured by an array antenna, for example.
- the transmission / reception unit 103 transmits specific information to the user terminal 20. Further, the transmission / reception unit 103 may transmit an allocation number determined by a predetermined rule as specific information to the user terminal 20. Further, the transmission / reception unit 103 may transmit a bit sequence including a specific bit sequence (reserved bit sequence) at the end to the user terminal 20.
- the transmission / reception unit 103 may transmit information regarding the number of bits of the specific information to the user terminal 20 in advance. In addition, the transmission / reception unit 103 may transmit notification information for specifying the reference resource to the user terminal 20 using downlink control information. In addition, the transmission / reception unit 103 transmits, to the user terminal 20, information for specifying the relative coordinates of interlace allocation resources arranged at intervals and / or the interlace bandwidth of the interlace allocation resources as specific information. May be.
- FIG. 30 is a diagram illustrating an example of a functional configuration of a radio base station according to an embodiment of the present invention.
- the functional block of the characteristic part in this embodiment is mainly shown, and the wireless base station 10 shall also have another functional block required for radio
- the baseband signal processing unit 104 includes at least a control unit (scheduler) 301, a transmission signal generation unit 302, a mapping unit 303, a reception signal processing unit 304, and a measurement unit 305. These configurations may be included in the radio base station 10, and a part or all of the configurations may not be included in the baseband signal processing unit 104.
- the control unit (scheduler) 301 controls the entire radio base station 10.
- the control part 301 can be comprised from the controller, the control circuit, or control apparatus demonstrated based on the common recognition in the technical field which concerns on this invention.
- the control unit 301 controls, for example, signal generation by the transmission signal generation unit 302, signal allocation by the mapping unit 303, and the like.
- the control unit 301 also controls signal reception processing by the reception signal processing unit 304, signal measurement by the measurement unit 305, and the like.
- the control unit 301 controls scheduling (for example, resource allocation) of system information, a downlink data signal transmitted on the PDSCH, and a downlink control signal transmitted on the PDCCH and / or EPDCCH. Further, the control unit 301 controls generation of a downlink control signal (for example, delivery confirmation information), a downlink data signal, and the like based on a result of determining whether or not retransmission control is required for the uplink data signal. Further, the control unit 301 controls scheduling of synchronization signals (for example, PSS (Primary Synchronization Signal) / SSS (Secondary Synchronization Signal)), downlink reference signals (for example, CRS, CSI-RS, DMRS) and the like.
- PSS Primary Synchronization Signal
- SSS Secondary Synchronization Signal
- control unit 301 includes an uplink data signal transmitted on the PUSCH, an uplink control signal transmitted on the PUCCH and / or PUSCH (for example, delivery confirmation information), a random access preamble transmitted on the PRACH, an uplink reference signal, etc. Control scheduling.
- the control unit 301 uses the digital BF (for example, precoding) by the baseband signal processing unit 104 and / or the analog BF (for example, phase rotation) by the transmission / reception unit 103 to form a transmission beam and / or a reception beam. To control.
- digital BF for example, precoding
- analog BF for example, phase rotation
- control unit 301 may control the user terminal 20 to transmit specific information.
- the control unit 301 may control the user terminal 20 to transmit an allocation number determined by a predetermined rule as specific information.
- the control unit 301 may control the user terminal 20 to transmit a bit sequence including a specific bit sequence (reserved bit sequence) at the end.
- control unit 301 may control the user terminal 20 to transmit information related to the number of bits of the specific information in advance.
- the control unit 301 may control the user terminal 20 so as to transmit notification information for specifying a reference resource using downlink control information.
- the control unit 301 transmits information for specifying the relative coordinates of the interlace allocation resources arranged at intervals and / or the interlace bandwidth of the interlace allocation resources to the user terminal 20 as specific information. You may control as follows.
- the transmission signal generation unit 302 generates a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) based on an instruction from the control unit 301, and outputs it to the mapping unit 303.
- the transmission signal generation unit 302 can be configured by a signal generator, a signal generation circuit, or a signal generation device described based on common recognition in the technical field according to the present invention.
- the transmission signal generation unit 302 generates, for example, a DL assignment that notifies downlink signal allocation information and a UL grant that notifies uplink signal allocation information based on an instruction from the control unit 301.
- the downlink data signal is subjected to coding processing and modulation processing according to a coding rate, a modulation scheme, and the like determined based on channel state information (CSI: Channel State Information) from each user terminal 20.
- CSI Channel State Information
- the mapping unit 303 maps the downlink signal generated by the transmission signal generation unit 302 to a predetermined radio resource based on an instruction from the control unit 301, and outputs it to the transmission / reception unit 103.
- the mapping unit 303 can be configured by a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present invention.
- the reception signal processing unit 304 performs reception processing (for example, demapping, demodulation, decoding, etc.) on the reception signal input from the transmission / reception unit 103.
- the received signal is, for example, an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) transmitted from the user terminal 20.
- the reception signal processing unit 304 can be configured by a signal processor, a signal processing circuit, or a signal processing device described based on common recognition in the technical field according to the present invention.
- the reception signal processing unit 304 outputs the information decoded by the reception processing to the control unit 301. For example, when receiving PUCCH including HARQ-ACK, HARQ-ACK is output to control section 301.
- the reception signal processing unit 304 outputs the reception signal and / or the signal after reception processing to the measurement unit 305.
- the measurement unit 305 performs measurement on the received signal.
- the measurement part 305 can be comprised from the measuring device, measurement circuit, or measurement apparatus demonstrated based on common recognition in the technical field which concerns on this invention.
- the measurement unit 305 for example, received power of a received signal (for example, RSRP (Reference Signal Received Power)), reception quality (for example, RSRQ (Reference Signal Received Quality), SINR (Signal to Interference plus Noise Ratio)), uplink You may measure about propagation path information (for example, CSI) etc.
- RSRP Reference Signal Received Power
- reception quality for example, RSRQ (Reference Signal Received Quality)
- SINR Signal to Interference plus Noise Ratio
- uplink You may measure about propagation path information (for example, CSI) etc.
- the measurement result may be output to the control unit 301.
- FIG. 31 is a diagram illustrating an example of the overall configuration of a user terminal according to an embodiment of the present invention.
- the user terminal 20 includes a plurality of transmission / reception antennas 201, an amplifier unit 202, a transmission / reception unit 203, a baseband signal processing unit 204, and an application unit 205.
- the transmission / reception antenna 201, the amplifier unit 202, and the transmission / reception unit 203 may each be configured to include one or more.
- the radio frequency signal received by the transmission / reception antenna 201 is amplified by the amplifier unit 202.
- the transmission / reception unit 203 receives the downlink signal amplified by the amplifier unit 202.
- the transmission / reception unit 203 converts the frequency of the received signal into a baseband signal and outputs it to the baseband signal processing unit 204.
- the transmission / reception unit 203 can be configured by a transmitter / receiver, a transmission / reception circuit, or a transmission / reception device described based on common recognition in the technical field according to the present invention.
- the transmission / reception unit 203 may be configured as an integral transmission / reception unit, or may be configured from a transmission unit and a reception unit.
- the baseband signal processing unit 204 performs FFT processing, error correction decoding, retransmission control reception processing, and the like on the input baseband signal.
- the downlink user data is transferred to the application unit 205.
- the application unit 205 performs processing related to layers higher than the physical layer and the MAC layer. Also, broadcast information of downlink data may be transferred to the application unit 205.
- uplink user data is input from the application unit 205 to the baseband signal processing unit 204.
- the baseband signal processing unit 204 performs transmission / reception units for retransmission control (for example, HARQ transmission processing), channel coding, precoding, discrete Fourier transform (DFT) processing, IFFT processing, and the like.
- the transmission / reception unit 203 converts the baseband signal output from the baseband signal processing unit 204 into a radio frequency band and transmits it.
- the radio frequency signal frequency-converted by the transmission / reception unit 203 is amplified by the amplifier unit 202 and transmitted from the transmission / reception antenna 201.
- the transmission / reception unit 203 may further include an analog beam forming unit that performs analog beam forming.
- the analog beam forming unit includes an analog beam forming circuit (for example, phase shifter, phase shift circuit) or an analog beam forming apparatus (for example, phase shifter) described based on common recognition in the technical field according to the present invention. can do.
- the transmission / reception antenna 201 can be configured by, for example, an array antenna.
- the transmission / reception unit 203 receives specific information from the radio base station 10.
- the transmission / reception unit 203 may receive an allocation number determined by a predetermined rule as specific information from the radio base station 10.
- the transmission / reception unit 203 may receive a bit sequence including a specific bit sequence (reserved bit sequence) at the end from the radio base station 10.
- the transmission / reception unit 203 may receive information related to the number of bits of the specific information from the radio base station 10 in advance. Further, the transmission / reception unit 203 may receive notification information identifying the reference resource from the radio base station 10 using downlink control information. Further, the transmitting / receiving unit 203 receives, from the radio base station 10, information for specifying the relative coordinates of the interlace allocation resources and / or the interlace bandwidth of the interlace allocation resources that are arranged at intervals. Also good.
- FIG. 32 is a diagram illustrating an example of a functional configuration of a user terminal according to an embodiment of the present invention.
- the functional blocks of the characteristic part in the present embodiment are mainly shown, and the user terminal 20 also has other functional blocks necessary for wireless communication.
- the baseband signal processing unit 204 included in the user terminal 20 includes at least a control unit 401, a transmission signal generation unit 402, a mapping unit 403, a reception signal processing unit 404, and a measurement unit 405. Note that these configurations may be included in the user terminal 20, and some or all of the configurations may not be included in the baseband signal processing unit 204.
- the control unit 401 controls the entire user terminal 20.
- the control unit 401 can be composed of a controller, a control circuit, or a control device described based on common recognition in the technical field according to the present invention.
- the control unit 401 controls, for example, signal generation by the transmission signal generation unit 402, signal allocation by the mapping unit 403, and the like.
- the control unit 401 also controls signal reception processing by the reception signal processing unit 404, signal measurement by the measurement unit 405, and the like.
- the control unit 401 obtains, from the received signal processing unit 404, a downlink control signal (a signal transmitted by PDCCH / EPDCCH) and a downlink data signal (a signal transmitted by PDSCH) transmitted from the radio base station 10.
- the control unit 401 controls generation of an uplink control signal (eg, delivery confirmation information) and / or an uplink data signal based on a result of determining whether or not retransmission control is required for the downlink control signal and / or downlink data signal. To do.
- the control unit 401 uses the digital BF (for example, precoding) by the baseband signal processing unit 204 and / or the analog BF (for example, phase rotation) by the transmission / reception unit 203 to form a transmission beam and / or a reception beam. To control.
- digital BF for example, precoding
- analog BF for example, phase rotation
- control unit 401 determines allocation of radio resources used for signal transmission or reception based on the specific information acquired from the reception signal processing unit 404. Further, the control unit 401 may specify the frequency offset and the allocated resource amount based on the allocation number. Further, the control unit 401 may determine that a bit sequence other than the specific bit sequence is the specific information. Further, the control unit 401 may determine the number of bits of the specific information based on the number of bits of the specific information notified in advance.
- control unit 401 may select a reference resource from a plurality of reference resource candidates based on notification information for specifying the reference resource.
- control unit 401 may determine the allocation of the interlace allocation resource based on the specific information that specifies the relative coordinates of the interlace allocation resources arranged at intervals and the interlace bandwidth of the interlace allocation resource.
- control unit 401 may update parameters used for control based on the information.
- the transmission signal generation unit 402 generates an uplink signal (uplink control signal, uplink data signal, uplink reference signal, etc.) based on an instruction from the control unit 401 and outputs the uplink signal to the mapping unit 403.
- the transmission signal generation unit 402 can be configured by a signal generator, a signal generation circuit, or a signal generation device described based on common recognition in the technical field according to the present invention.
- the transmission signal generation unit 402 generates an uplink control signal related to delivery confirmation information, channel state information (CSI), and the like based on an instruction from the control unit 401, for example. In addition, the transmission signal generation unit 402 generates an uplink data signal based on an instruction from the control unit 401. For example, the transmission signal generation unit 402 is instructed by the control unit 401 to generate an uplink data signal when the UL grant is included in the downlink control signal notified from the radio base station 10.
- CSI channel state information
- the mapping unit 403 maps the uplink signal generated by the transmission signal generation unit 402 to a radio resource based on an instruction from the control unit 401, and outputs the radio signal to the transmission / reception unit 203.
- the mapping unit 403 can be configured by a mapper, a mapping circuit, or a mapping device described based on common recognition in the technical field according to the present invention.
- the reception signal processing unit 404 performs reception processing (for example, demapping, demodulation, decoding, etc.) on the reception signal input from the transmission / reception unit 203.
- the received signal is, for example, a downlink signal (downlink control signal, downlink data signal, downlink reference signal, etc.) transmitted from the radio base station 10.
- the reception signal processing unit 404 can be configured by a signal processor, a signal processing circuit, or a signal processing device described based on common recognition in the technical field according to the present invention. Further, the reception signal processing unit 404 can constitute a reception unit according to the present invention.
- the reception signal processing unit 404 outputs the information decoded by the reception processing to the control unit 401.
- the reception signal processing unit 404 outputs, for example, broadcast information, system information, RRC signaling, DCI, and the like to the control unit 401.
- the reception signal processing unit 404 outputs the reception signal and / or the signal after reception processing to the measurement unit 405.
- the measurement unit 405 performs measurement on the received signal.
- the measurement unit 405 performs measurement using the downlink reference signal transmitted from the radio base station 10.
- the measurement part 405 can be comprised from the measuring device, measurement circuit, or measurement apparatus demonstrated based on common recognition in the technical field which concerns on this invention.
- the measurement unit 405 may measure, for example, reception power (for example, RSRP), reception quality (for example, RSRQ, reception SINR), downlink channel information (for example, CSI), and the like of the received signal.
- the measurement result may be output to the control unit 401.
- each functional block may be realized by one device physically and / or logically coupled, and two or more devices physically and / or logically separated may be directly and / or indirectly. (For example, wired and / or wireless) and may be realized by these plural devices.
- a radio base station, a user terminal, etc. in an embodiment of the present invention may function as a computer that performs processing of the radio communication method of the present invention.
- FIG. 33 is a diagram illustrating an example of a hardware configuration of a radio base station and a user terminal according to an embodiment of the present invention.
- the wireless base station 10 and the user terminal 20 described above may be physically configured as a computer device including a processor 1001, a memory 1002, a storage 1003, a communication device 1004, an input device 1005, an output device 1006, a bus 1007, and the like. Good.
- the term “apparatus” can be read as a circuit, a device, a unit, or the like.
- the hardware configurations of the radio base station 10 and the user terminal 20 may be configured to include one or a plurality of each device illustrated in the figure, or may be configured not to include some devices.
- processor 1001 may be implemented by one or more chips.
- each function in the radio base station 10 and the user terminal 20 reads predetermined software (program) on hardware such as the processor 1001 and the memory 1002, so that the processor 1001 performs computation and communication by the communication device 1004. It is realized by controlling the reading and / or writing of data in the memory 1002 and the storage 1003.
- the processor 1001 controls the entire computer by operating an operating system, for example.
- the processor 1001 may be configured by a central processing unit (CPU) including an interface with peripheral devices, a control device, an arithmetic device, a register, and the like.
- CPU central processing unit
- the baseband signal processing unit 104 (204) and the call processing unit 105 described above may be realized by the processor 1001.
- the processor 1001 reads programs (program codes), software modules, data, and the like from the storage 1003 and / or the communication device 1004 to the memory 1002, and executes various processes according to these.
- programs program codes
- software modules software modules
- data data
- the like data
- the control unit 401 of the user terminal 20 may be realized by a control program stored in the memory 1002 and operated by the processor 1001, and may be realized similarly for other functional blocks.
- the memory 1002 is a computer-readable recording medium such as a ROM (Read Only Memory), an EPROM (Erasable Programmable ROM), an EEPROM (Electrically EPROM), a RAM (Random Access Memory), or any other suitable storage medium. It may be configured by one.
- the memory 1002 may be called a register, a cache, a main memory (main storage device), or the like.
- the memory 1002 can store programs (program codes), software modules, and the like that can be executed to implement the wireless communication method according to an embodiment of the present invention.
- the storage 1003 is a computer-readable recording medium such as a flexible disk, a floppy (registered trademark) disk, a magneto-optical disk (for example, a compact disk (CD-ROM (Compact Disc ROM)), a digital versatile disk, Blu-ray® disk), removable disk, hard disk drive, smart card, flash memory device (eg, card, stick, key drive), magnetic stripe, database, server, or other suitable storage medium It may be constituted by.
- the storage 1003 may be referred to as an auxiliary storage device.
- the communication device 1004 is hardware (transmission / reception device) for performing communication between computers via a wired and / or wireless network, and is also referred to as a network device, a network controller, a network card, a communication module, or the like.
- the communication device 1004 includes, for example, a high-frequency switch, a duplexer, a filter, a frequency synthesizer, etc., in order to realize frequency division duplex (FDD) and / or time division duplex (TDD). It may be configured.
- FDD frequency division duplex
- TDD time division duplex
- the transmission / reception antenna 101 (201), the amplifier unit 102 (202), the transmission / reception unit 103 (203), the transmission path interface 106, and the like described above may be realized by the communication device 1004.
- the input device 1005 is an input device (for example, a keyboard, a mouse, a microphone, a switch, a button, a sensor, etc.) that accepts an input from the outside.
- the output device 1006 is an output device (for example, a display, a speaker, an LED (Light Emitting Diode) lamp, etc.) that performs output to the outside.
- the input device 1005 and the output device 1006 may have an integrated configuration (for example, a touch panel).
- each device such as the processor 1001 and the memory 1002 is connected by a bus 1007 for communicating information.
- the bus 1007 may be configured with a single bus or may be configured with different buses between apparatuses.
- the radio base station 10 and the user terminal 20 include a microprocessor, a digital signal processor (DSP), an ASIC (Application Specific Integrated Circuit), a PLD (Programmable Logic Device), an FPGA (Field Programmable Gate Array), and the like. It may be configured including hardware, and a part or all of each functional block may be realized by the hardware. For example, the processor 1001 may be implemented by at least one of these hardware.
- DSP digital signal processor
- ASIC Application Specific Integrated Circuit
- PLD Programmable Logic Device
- FPGA Field Programmable Gate Array
- the channel and / or symbol may be a signal (signaling).
- the signal may be a message.
- the reference signal may be abbreviated as RS (Reference Signal), and may be referred to as a pilot, a pilot signal, or the like depending on an applied standard.
- a component carrier CC: Component Carrier
- CC Component Carrier
- the radio frame may be configured with one or a plurality of periods (frames) in the time domain.
- Each of the one or more periods (frames) constituting the radio frame may be referred to as a subframe.
- a subframe may be composed of one or more slots in the time domain.
- the slot may be configured with one or a plurality of symbols (OFDM (Orthogonal Frequency Division Multiplexing) symbol, SC-FDMA (Single Carrier Frequency Division Multiple Access) symbol, etc.) in the time domain).
- OFDM Orthogonal Frequency Division Multiplexing
- SC-FDMA Single Carrier Frequency Division Multiple Access
- the radio frame, subframe, slot, and symbol all represent a time unit when transmitting a signal.
- Different names may be used for the radio frame, the subframe, the slot, and the symbol.
- one subframe may be referred to as a transmission time interval (TTI)
- TTI transmission time interval
- a plurality of consecutive subframes may be referred to as a TTI
- one slot may be referred to as a TTI.
- the subframe and / or TTI may be a subframe (1 ms) in the existing LTE, a period shorter than 1 ms (eg, 1-13 symbols), or a period longer than 1 ms. There may be.
- TTI means, for example, a minimum time unit for scheduling in wireless communication.
- a radio base station performs scheduling for assigning radio resources (frequency bandwidth, transmission power, etc. that can be used in each user terminal) to each user terminal in units of TTI.
- the definition of TTI is not limited to this.
- the TTI may be a transmission time unit of a channel-encoded data packet (transport block), or may be a processing unit such as scheduling or link adaptation.
- a TTI having a time length of 1 ms may be called a normal TTI (TTI in LTE Rel. 8-12), a normal TTI, a long TTI, a normal subframe, a normal subframe, or a long subframe.
- TTI shorter than a normal TTI may be called a shortened TTI, a short TTI, a shortened subframe, a short subframe, or the like.
- a resource block is a resource allocation unit in the time domain and the frequency domain, and may include one or a plurality of continuous subcarriers (subcarriers) in the frequency domain. Further, the RB may include one or a plurality of symbols in the time domain, and may have a length of one slot, one subframe, or 1 TTI. One TTI and one subframe may each be composed of one or a plurality of resource blocks.
- the RB may be called a physical resource block (PRB: Physical RB), a PRB pair, an RB pair, or the like.
- the resource block may be composed of one or a plurality of resource elements (RE: Resource Element).
- RE Resource Element
- 1RE may be a radio resource region of 1 subcarrier and 1 symbol.
- the structure of the above-described radio frame, subframe, slot, symbol, and the like is merely an example.
- the configuration such as the cyclic prefix (CP) length can be changed in various ways.
- information, parameters, and the like described in this specification may be represented by absolute values, may be represented by relative values from a predetermined value, or may be represented by other corresponding information.
- the radio resource may be indicated by a predetermined index.
- mathematical formulas and the like using these parameters may differ from those explicitly disclosed herein.
- PUCCH Physical Uplink Control Channel
- PDCCH Physical Downlink Control Channel
- information elements can be identified by any suitable name, so the various channels and information elements assigned to them.
- the name is not limiting in any way.
- information, signals, etc. can be output from the upper layer to the lower layer and / or from the lower layer to the upper layer.
- Information, signals, and the like may be input / output via a plurality of network nodes.
- the input / output information, signals, etc. may be stored in a specific location (for example, a memory), or may be managed by a management table. Input / output information, signals, and the like can be overwritten, updated, or added. The output information, signals, etc. may be deleted. Input information, signals, and the like may be transmitted to other devices.
- information notification includes physical layer signaling (eg, downlink control information (DCI), uplink control information (UCI)), upper layer signaling (eg, RRC (Radio Resource Control) signaling), It may be implemented by broadcast information (Master Information Block (MIB), System Information Block (SIB), etc.), MAC (Medium Access Control) signaling), other signals, or a combination thereof.
- DCI downlink control information
- UCI uplink control information
- RRC Radio Resource Control
- MIB Master Information Block
- SIB System Information Block
- MAC Medium Access Control
- the physical layer signaling may be referred to as L1 / L2 (Layer 1 / Layer 2) control information (L1 / L2 control signal), L1 control information (L1 control signal), or the like.
- the RRC signaling may be referred to as an RRC message, and may be, for example, an RRC connection setup (RRCConnectionSetup) message, an RRC connection reconfiguration (RRCConnectionReconfiguration) message, or the like.
- the MAC signaling may be notified by, for example, a MAC control element (MAC CE (Control Element)).
- notification of predetermined information is not limited to explicitly performed, but implicitly (for example, by not performing notification of the predetermined information or another (By notification of information).
- the determination may be performed by a value represented by 1 bit (0 or 1), or may be performed by a boolean value represented by true or false.
- the comparison may be performed by numerical comparison (for example, comparison with a predetermined value).
- software, instructions, information, etc. may be sent and received via a transmission medium.
- software can use websites, servers using wired technology (coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), etc.) and / or wireless technology (infrared, microwave, etc.) , Or other remote sources, these wired and / or wireless technologies are included within the definition of transmission media.
- system and “network” used in this specification are used interchangeably.
- base station BS
- radio base station eNB
- cell e.g., a fixed station
- eNodeB eNodeB
- cell group e.g., a cell
- carrier femtocell
- component carrier e.g., a fixed station, NodeB, eNodeB (eNB), access point, transmission point, reception point, femtocell, and small cell.
- the base station can accommodate one or a plurality of (for example, three) cells (also called sectors). If the base station accommodates multiple cells, the entire coverage area of the base station can be partitioned into multiple smaller areas, each smaller area being a base station subsystem (eg, an indoor small base station (RRH: The term “cell” or “sector” refers to part or all of the coverage area of a base station and / or base station subsystem that provides communication service in this coverage. Point to.
- RRH indoor small base station
- MS mobile station
- UE user equipment
- terminal may be used interchangeably.
- a base station may also be called in terms such as a fixed station, NodeB, eNodeB (eNB), access point, transmission point, reception point, femtocell, and small cell.
- NodeB NodeB
- eNodeB eNodeB
- access point transmission point
- reception point femtocell
- small cell small cell
- a mobile station is defined by those skilled in the art as a subscriber station, mobile unit, subscriber unit, wireless unit, remote unit, mobile device, wireless device, wireless communication device, remote device, mobile subscriber station, access terminal, mobile terminal, wireless It may also be called terminal, remote terminal, handset, user agent, mobile client, client or some other suitable terminology.
- the radio base station in this specification may be read by the user terminal.
- each aspect / embodiment of the present invention may be applied to a configuration in which communication between a radio base station and a user terminal is replaced with communication between a plurality of user terminals (D2D: Device-to-Device).
- the user terminal 20 may have a function that the wireless base station 10 has.
- words such as “up” and “down” may be read as “side”.
- the uplink channel may be read as a side channel.
- a user terminal in this specification may be read by a radio base station.
- the wireless base station 10 may have a function that the user terminal 20 has.
- the specific operation assumed to be performed by the base station may be performed by the upper node in some cases.
- various operations performed for communication with a terminal may be performed by one or more network nodes other than the base station and the base station (for example, It is obvious that this can be done by MME (Mobility Management Entity), S-GW (Serving-Gateway), etc., but not limited thereto) or a combination thereof.
- MME Mobility Management Entity
- S-GW Serving-Gateway
- each aspect / embodiment described in this specification may be used alone, in combination, or may be switched according to execution.
- the order of the processing procedures, sequences, flowcharts, and the like of each aspect / embodiment described in this specification may be changed as long as there is no contradiction.
- the methods described herein present the elements of the various steps in an exemplary order and are not limited to the specific order presented.
- Each aspect / embodiment described herein includes LTE (Long Term Evolution), LTE-A (LTE-Advanced), LTE-B (LTE-Beyond), SUPER 3G, IMT-Advanced, 4G (4th generation mobile). communication system), 5G (5th generation mobile communication system), FRA (Future Radio Access), New-RAT (Radio Access Technology), NR (New Radio), NX (New radio access), FX (Future generation radio access), GSM (registered trademark) (Global System for Mobile communications), CDMA2000, UMB (Ultra Mobile Broadband), IEEE 802.11 (Wi-Fi (registered trademark)), IEEE 802.16 (WiMAX (registered trademark)), IEEE 802 .20, UWB (Ultra-WideBand), Bluetooth (registered trademark), The present invention may be applied to a system using other appropriate wireless communication methods and / or a next generation system extended based on these.
- the phrase “based on” does not mean “based only on”, unless expressly specified otherwise. In other words, the phrase “based on” means both “based only on” and “based at least on.”
- any reference to elements using designations such as “first”, “second”, etc. as used herein does not generally limit the amount or order of those elements. These designations can be used herein as a convenient way to distinguish between two or more elements. Thus, reference to the first and second elements does not mean that only two elements can be employed or that the first element must precede the second element in some way.
- determining may encompass a wide variety of actions. For example, “determination” means calculating, computing, processing, deriving, investigating, looking up (eg, table, database or other data). It may be considered to “judge” (search in structure), ascertaining, etc.
- “determination (decision)” includes receiving (for example, receiving information), transmitting (for example, transmitting information), input (input), output (output), access ( accessing) (e.g., accessing data in memory), etc. may be considered to be “determining”. Also, “determination” is considered to be “determination (resolving)”, “selecting”, “choosing”, “establishing”, “comparing”, etc. Also good. That is, “determination (determination)” may be regarded as “determination (determination)” of some operation.
- connection refers to any direct or indirect connection between two or more elements or By coupling, it can include the presence of one or more intermediate elements between two elements that are “connected” or “coupled” to each other.
- the coupling or connection between the elements may be physical, logical, or a combination thereof.
- connection may be read as “access”.
- the two elements are radio frequency by using one or more wires, cables and / or printed electrical connections, and as some non-limiting and non-inclusive examples It can be considered to be “connected” or “coupled” to each other, such as by using electromagnetic energy having wavelengths in the region, microwave region, and / or light (both visible and invisible) region.
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Abstract
Description
<第1の実施形態>
図2は、第1の実施形態に係るリソース割り当て方法の一例を示す図である。第1の実施形態では、図2に示すように、割当リソースを制限せずに、システム帯域全体を、動的にリソース割り当て可能な帯域とする。第1の実施形態は、上述した特定情報の内容、通知の方法などにより、さらに大別することができる(実施形態1.1-1.2)。
図2及び図3を参照して、実施形態1.1について説明する。図3は、基準リソースからの相対座標を示す図である。
次に、実施形態1.2について説明する。実施形態1.2では、基準リソースからの相対座標と割当リソース量を特定する特定情報として、所定の規則で決定(ナンバリング又は付与)される割当番号がユーザ端末に通知される。図4は、基準リソースからの相対座標及び割当リソース量を特定する割当番号の一例を示す図である。
次に、図12を参照して、実施形態1.2の他の例について説明する。図12Aは、図10に示すリソース割り当て方法を、複数のリソースを束ねたリソースグループ(RG:Resource Group)に適用した例を示す図である。図12Bは、RG番号とビット系列との対応関係の一例を示す表であり、図12Cは、無線基地局から通知されるRG番号の一例を示す図である。
次に、第2の実施形態について説明する。図14は、第2の実施形態に係るリソース割り当て方法の一例を示す図である。第1の実施形態では、割当リソースを制限せずに、システム帯域全体を動的にリソース割り当て可能な帯域としたが、第2の実施形態では、図14に示すように、システム帯域に対してリソース割り当て可能な帯域を制限し、準静的に全ての無線リソースをユーザ端末に割り当てることを想定している。第2の実施形態では、無線基地局がシステム帯域内の特定の無線リソースを動的にユーザ端末に割り当てることが可能である。なお、第2の実施形態は、上述した特定情報の内容、通知の方法などにより、さらに大別することができる(実施形態2.1-2.3)。
図15及び図16を参照して、実施形態2.1について説明する。図15A及び図15Bは、割当リソースを制限した場合のリソース割り当て方法の一例を示す図である。図16Aは、図15における相対座標とビット系列との対応関係の一例を示す表であり、図16Bは、図15における割当リソース量とビット系列との対応関係の一例を示す表である。
次に、図17及び図18を参照して、実施形態2.2について説明する。図17Aは、割当リソースを制限した場合に無線基地局から通知される割当番号の一例を示す図であり、図17Bは、ユーザ端末が割当番号から割当リソースを特定する一例を示す図である。図18Aは割当リソースを制限した場合のリソース割り当て方法の他の一例を示す図であり、図18Bは割当番号とビット系列との対応関係の一例を示す表である。
次に、図19を参照して、実施形態2.3について説明する。図19は、リソース割り当て可能な帯域を通知する一例を示す図である。
(3)
Nall=Nleft+Nright+1
次に、第3の実施形態について説明する。第3の実施形態では、基準リソースの選択方法について説明する。なお、第3の実施形態は、基準リソースの選択方法により、さらに大別することができる(実施形態3.1-3.2)。
図20を参照して、実施形態3.1について説明する。図20は、基準リソースの選択方法(第3の実施形態)の一例を示す図である。実施形態3.1では、予め定められた所定のルールに従って基準リソースが選択されるものとする。具体的には、以下の3つのルールの少なくとも1つに従って基準リソースが選択される。
(2)ユーザ端末は、ブロードキャスト情報などのシステム情報で基準リソースの変更が通知された場合は、通知された無線リソースを基準リソースに設定する。
(3)ユーザ端末は、上位レイヤシグナリングなどで個別に基準リソースが通知された場合は、通知された無線リソースを基準リソースに設定する。
次に、図21を参照して、実施形態3.2について説明する。図21Aは、基準リソースの選択方法の他の一例を示す図であり、図21Bは、基準リソース候補のリソース番号と通知情報との対応関係の一例を示す表である。
次に、第4の実施形態について説明する。第4の実施形態では、本発明に係るリソース割り当て方法をインターレース型の割り当て方法に適用した例について説明する。なお、第4の実施形態は、通知される情報により、さらに大別することができる(実施形態4.1-4.2)。
図22を参照して、実施形態4.1について説明する。第4の実施形態に係るリソース割り当て方法の一例を示す図である。実施形態4.1では、間隔を空けて配置された無線リソースを用いるリソース割り当て、すなわちインターレース型のリソース割り当てについて説明する。
次に、図23及び図24を参照して、実施形態4.2について説明する。図23は、第4の実施形態に係るリソース割り当て方法の他の一例を示す図である。図24は、図23の他の具体例を示す図である。
以下、図25を参照して、本発明に係るリソース割り当て方法において、リソースの並べ替えを適用した例について説明する。図25Aは、リソースを並べ替える前の図を示し、図25Bは、リソース番号の並べ替えの一例を示し、図25Cは、リソースを並べ替えた後の図を示している。
以下、本発明の一実施形態に係る無線通信システムの構成について説明する。この無線通信システムでは、本発明の上記各実施形態に係る無線通信方法のいずれか又はこれらの組み合わせを用いて通信が行われる。
図29は、本発明の一実施形態に係る無線基地局の全体構成の一例を示す図である。無線基地局10は、複数の送受信アンテナ101と、アンプ部102と、送受信部103と、ベースバンド信号処理部104と、呼処理部105と、伝送路インターフェース106と、を備えている。なお、送受信アンテナ101、アンプ部102、送受信部103は、それぞれ1つ以上を含むように構成されればよい。
図31は、本発明の一実施形態に係るユーザ端末の全体構成の一例を示す図である。ユーザ端末20は、複数の送受信アンテナ201と、アンプ部202と、送受信部203と、ベースバンド信号処理部204と、アプリケーション部205と、を備えている。なお、送受信アンテナ201、アンプ部202、送受信部203は、それぞれ1つ以上を含むように構成されればよい。
なお、上記実施形態の説明に用いたブロック図は、機能単位のブロックを示している。これらの機能ブロック(構成部)は、ハードウェア及び/又はソフトウェアの任意の組み合わせによって実現される。また、各機能ブロックの実現手段は特に限定されない。すなわち、各機能ブロックは、物理的及び/又は論理的に結合した1つの装置により実現されてもよいし、物理的及び/又は論理的に分離した2つ以上の装置を直接的及び/又は間接的に(例えば、有線及び/又は無線)で接続し、これら複数の装置により実現されてもよい。
なお、本明細書で説明した用語及び/又は本明細書の理解に必要な用語については、同一の又は類似する意味を有する用語と置き換えてもよい。例えば、チャネル及び/又はシンボルは信号(シグナリング)であってもよい。また、信号はメッセージであってもよい。参照信号は、RS(Reference Signal)と略称することもでき、適用される標準によってパイロット(Pilot)、パイロット信号などと呼ばれてもよい。また、コンポーネントキャリア(CC:Component Carrier)は、セル、周波数キャリア、キャリア周波数などと呼ばれてもよい。
Claims (7)
- 基準リソースに対する無線リソースの周波数オフセット及び/又は前記無線リソースの割当リソース量を特定するための特定情報を受信する受信部と、
前記特定情報に基づいて前記無線リソースの割り当てを判断する制御部と、を有することを特徴とするユーザ端末。 - 前記受信部は、前記特定情報として、所定の規則で決定される割当番号を受信し、
前記制御部は、前記割当番号に基づいて前記周波数オフセット及び前記割当リソース量を特定することを特徴とする請求項1に記載のユーザ端末。 - 前記受信部は、特定のビット系列を末尾に含むビット系列を受信し、
前記制御部は、前記特定のビット系列以外の前記ビット系列が前記特定情報であると判断することを特徴とする請求項1に記載のユーザ端末。 - 前記受信部は、前記特定情報のビット数に関する情報を受信し、
前記制御部は、前記ビット数に関する情報に基づいて前記特定情報のビット数を判断することを特徴とする請求項1に記載のユーザ端末。 - 前記受信部は、前記基準リソースを特定する通知情報を下り制御情報により受信し、
前記制御部は、前記通知情報に基づいて、複数の基準リソースの候補から前記基準リソースを選択することを特徴とする請求項1に記載のユーザ端末。 - 前記受信部は、前記特定情報として、間隔を空けて配置されるインターレース割当リソースの周波数オフセット及び/又は前記インターレース割当リソースのインターレース帯域幅を特定するための情報を受信し、
前記制御部は、前記特定情報に基づいて前記インターレース割当リソースの割り当てを判断することを特徴とする請求項1に記載のユーザ端末。 - 基準リソースに対する無線リソースの周波数オフセット及び/又は前記無線リソースの割当リソース量を特定するための特定情報を受信する工程と、
前記特定情報に基づいて前記無線リソースの割り当てを判断する工程と、を有することを特徴とする無線通信方法。
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
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US16/324,244 US10827478B2 (en) | 2016-08-10 | 2017-08-08 | User terminal and radio communication method |
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AU2017310731A AU2017310731B2 (en) | 2016-08-10 | 2017-08-08 | User equipment and radio communication method |
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EP17839488.8A EP3496487B1 (en) | 2016-08-10 | 2017-08-08 | User equipment and radio communication method |
JP2018533510A JP7034918B2 (ja) | 2016-08-10 | 2017-08-08 | 端末、無線通信方法、及びシステム |
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JP2021536150A (ja) * | 2018-06-29 | 2021-12-23 | パナソニック インテレクチュアル プロパティ コーポレーション オブ アメリカPanasonic Intellectual Property Corporation of America | 送信装置、受信装置、送信方法及び受信方法 |
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CN117527173A (zh) * | 2020-11-16 | 2024-02-06 | 上海朗帛通信技术有限公司 | 一种被用于无线通信的节点中的方法和装置 |
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EP3496487A1 (en) | 2019-06-12 |
US10827478B2 (en) | 2020-11-03 |
CN109792730B (zh) | 2023-05-16 |
AU2017310731A1 (en) | 2019-03-28 |
AU2017310731B2 (en) | 2021-10-07 |
US20190174473A1 (en) | 2019-06-06 |
JP7034918B2 (ja) | 2022-03-14 |
EP3496487B1 (en) | 2022-01-19 |
ES2905481T3 (es) | 2022-04-08 |
EP3496487A4 (en) | 2019-08-14 |
CN109792730A (zh) | 2019-05-21 |
JPWO2018030418A1 (ja) | 2019-06-20 |
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