WO2010110283A1 - 無線基地局及び移動通信方法 - Google Patents
無線基地局及び移動通信方法 Download PDFInfo
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- WO2010110283A1 WO2010110283A1 PCT/JP2010/055018 JP2010055018W WO2010110283A1 WO 2010110283 A1 WO2010110283 A1 WO 2010110283A1 JP 2010055018 W JP2010055018 W JP 2010055018W WO 2010110283 A1 WO2010110283 A1 WO 2010110283A1
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J13/00—Code division multiplex systems
- H04J13/16—Code allocation
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0026—Transmission of channel quality indication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/0001—Systems modifying transmission characteristics according to link quality, e.g. power backoff
- H04L1/0023—Systems modifying transmission characteristics according to link quality, e.g. power backoff characterised by the signalling
- H04L1/0027—Scheduling of signalling, e.g. occurrence thereof
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0072—Error control for data other than payload data, e.g. control data
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0075—Transmission of coding parameters to receiver
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/54—Allocation or scheduling criteria for wireless resources based on quality criteria
- H04W72/542—Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
Definitions
- the present invention relates to a radio base station and a mobile communication method.
- each mobile station UE is connected to a radio base station eNB via a PUCCH (Physical Uplink Control Channel, physical uplink control channel). It is configured to transmit a CQI (Channel Quality Indicator) corresponding to the reception quality in the downlink transmitted in the cell under the radio base station eNB.
- PUCCH Physical Uplink Control Channel, physical uplink control channel
- the present invention has been made in view of the above-described problems, and an object thereof is to provide a radio base station and a mobile communication method that can appropriately allocate resources for CQI transmission.
- a first feature of the present invention is a radio base station, which assigns to each mobile station a time direction resource and a frequency direction resource that are allocated as reception quality notification resources to be used for notifying reception quality in the downlink.
- a resource allocation unit configured to determine a code direction resource, wherein the resource allocation unit determines a resource block to be allocated as the reception quality notification resource, and then allocates the resource as the reception quality notification resource.
- the code direction resource is configured to be determined, and the resource block is configured by a predetermined number of time direction resources and a predetermined number of frequency resources.
- a second feature of the present invention is a mobile communication method, in which a time direction resource and a frequency direction resource allocated as reception quality notification resources to be used for notifying reception quality in a downlink to each mobile station, A step A for determining a code direction resource, and a step B for notifying each mobile station of the time direction resource, the frequency direction resource, and the code direction resource allocated as the reception quality notification resource. And determining, in the step A, a resource block to be allocated as the reception quality notification resource, determining a code direction resource to be allocated as the reception quality notification resource, and the resource block includes a predetermined number of time direction resources And a predetermined number of frequency resources. .
- FIG. 1 is an overall configuration diagram of a mobile communication system according to a first embodiment of the present invention.
- FIG. 2 is a functional block diagram of the radio base station according to the first embodiment of the present invention.
- FIG. 3 is a diagram for explaining a method of designating a subframe for transmitting a CQI allocated by the radio base station according to the first embodiment of the present invention.
- FIG. 4 is a diagram for explaining a PUCCH resource allocation method by the radio base station according to the first embodiment of the present invention.
- FIG. 5 is a diagram for explaining resource blocks in a PUCCH resource allocated by the radio base station according to the first embodiment of the present invention.
- FIG. 6 is a diagram for explaining a method of allocating resource blocks in PUCCH resources for transmitting CQI, ACK / NACK, and Scheduling Request by the radio base station according to the first embodiment of the present invention. is there.
- FIG. 7 is a diagram for explaining resource blocks allocated for dedicated transmission of CQI among resource blocks in a PUCCH resource by the radio base station according to the first embodiment of the present invention.
- FIG. 8 shows resource blocks allocated for transmitting CQI, ACK / NACK and Scheduling Request in a mixed manner among resource blocks in the PUCCH resource by the radio base station according to the first embodiment of the present invention. It is a figure for demonstrating.
- FIG. 7 is a diagram for explaining resource blocks allocated for dedicated transmission of CQI among resource blocks in a PUCCH resource by the radio base station according to the first embodiment of the present invention.
- FIG. 8 shows resource blocks allocated for transmitting CQI, ACK / NACK and Scheduling Request in a mixed manner among resource blocks in the P
- FIG. 9 is a diagram for explaining an index to be assigned to a resource block in a PUCCH resource allocated by the radio base station according to the first embodiment of the present invention.
- FIG. 10 is a diagram for explaining a method of allocating resource blocks in PUCCH resources for transmitting CQI by the radio base station according to the first embodiment of the present invention.
- FIG. 11 is a diagram for explaining a problem that occurs at both ends of the system bandwidth of the mobile communication system according to the first embodiment of the present invention.
- FIG. 12 is a diagram for explaining a method of allocating resource blocks in PUCCH resources for transmitting CQI by the radio base station according to the first embodiment of the present invention.
- FIG. 10 is a diagram for explaining a method of allocating resource blocks in PUCCH resources for transmitting CQI by the radio base station according to the first embodiment of the present invention.
- FIG. 13 is a diagram for explaining a method of allocating resource blocks in PUCCH resources for transmitting CQI by the radio base station according to the first embodiment of the present invention.
- FIG. 14 is a diagram for explaining a method of allocating code direction resources in PUCCH resources in order to transmit CQI by the radio base station according to the first embodiment of the present invention.
- FIG. 15 is a diagram for explaining a method of allocating resource blocks in PUCCH resources for transmitting CQI by the radio base station according to the first embodiment of the present invention.
- FIG. 16 is a flowchart showing a method for assigning resources for transmitting CQI by the radio base station according to the first embodiment of the present invention.
- FIG. 17 is a flowchart showing a method for allocating resources for transmitting CQI by the radio base station according to the first embodiment of the present invention.
- FIG. 18 is a flowchart showing a method for allocating resources for transmitting CQI by the radio base station according to the first embodiment of the present invention.
- FIG. 19 is a flowchart showing a method of assigning resources for transmitting CQI by the radio base station according to the first embodiment of the present invention.
- the mobile communication system according to the present embodiment is an LTE mobile communication system.
- the mobile station UE transmits a radio base station via the PUCCH.
- the eNB is configured to transmit CQI, ACK / NACK (hereinafter, A / N) for downlink data, Scheduling Request (hereinafter, SR) for requesting scheduling for uplink data transmission, and the like. Yes.
- the radio base station eNB includes a resource allocation unit 11, a notification unit 12, and a path loss acquisition unit 13.
- the resource allocation unit 11 is configured to allocate a predetermined physical channel resource in each cell under the radio base station eNB.
- the resource allocation unit 11 is configured to allocate a PUCCH resource, a PUSCH (Physical Uplink Shared Channel, physical uplink shared channel) resource, or the like as an uplink physical channel resource in each cell under the radio base station eNB. Has been.
- a PUCCH resource Physical Uplink Shared Channel, physical uplink shared channel
- PUSCH Physical Uplink Shared Channel, physical uplink shared channel
- the resource allocating unit 11 uses PDCCH (Physical Downlink Control Channel) resources, PDSCH (Physical Downlink Shared Channel, Physical Downlink) as downlink physical channel resources in each cell under the radio base station eNB. Shared channel) resources and the like are allocated.
- PDCCH Physical Downlink Control Channel
- PDSCH Physical Downlink Shared Channel, Physical Downlink
- the resource allocation unit 11 selects a CQI transmission resource (a reception quality notification resource to be used for notifying the reception quality in the downlink), an A / N transmission resource, and an SR transmission resource from among the PUCCH resources. Configured to allocate resources.
- the mobile station UE is configured to measure downlink reception quality (for example, SIR) using Downlink Reference Signal (RS) and calculate CQI corresponding to the measured reception quality.
- SIR downlink reception quality
- RS Downlink Reference Signal
- WB CQI Wideband CQI
- Subband CQI measured over the entire system bandwidth
- the notification unit 12 is configured to notify the resource allocated by the resource allocation unit 11 in each cell under the radio base station eNB.
- the notification unit 12 is configured to notify each mobile station UE of a CQI transmission resource, an A / N transmission resource, and an SR transmission resource with an RRC message.
- WB CQI transmission resource (i.e., sub-frame), the report cycle N P and offset N OFFSET, since identified by the CQI, the notification unit 12 shown in FIG. 3 (a) "I CQI / PMI By transmitting “(cqi-pmi-ConfigIndex)”, the resource for the “WB CQI” transmission (ie, subframe) allocated by the resource allocation unit 11 may be notified.
- the path loss acquisition unit 13 is configured to acquire a propagation loss (path loss) in the uplink.
- the path loss acquisition unit 13 may be configured to calculate an uplink propagation loss (path loss) based on “Power Headroom” notified from the mobile station UE.
- Path loss is information indicating how much transmission power is available in the mobile station UE.
- the resource allocation unit 11 allocates resource blocks for PUCCH in order from resource blocks at both ends in the system bandwidth, and sets resource blocks inside the resource blocks allocated as PUCCH resource blocks. , And is configured to be allocated as a PUSCH resource block.
- each PUCCH resource block is configured to perform code multiplexing. Therefore, the resource allocation unit 11 is configured to allocate time direction resources, frequency direction resources, and code direction resources as PUCCH resources.
- the time direction resource is a subframe
- the frequency direction resource is a resource block configured by 7 OFDM symbols and 12 subcarriers.
- the code direction resource has a “Cyclic Shift” relationship and is configured by a plurality of sequences (Cyclic Sequences, hereinafter referred to as CS) that are orthogonal to each other.
- the resource allocation unit 11 allocates PUCCH resources between the first half part (slot) and the second half part (slot) in one subframe by “Intra-subframe frequency hopping” as shown in FIG. It is configured as follows.
- resource block numbers are assigned to resource blocks that can be PUCCH resource blocks in order from both ends of the system bandwidth.
- N RB UL is the number of resource blocks that can be allocated as resource blocks for uplink channels (for example, PUCCH and PUSCH).
- the resource allocation unit 11 is configured to allocate two resource blocks to which the same resource block number is assigned as the same PUCCH resource block.
- the resource allocation unit 11 allocates CQI transmission resource blocks in order from the resource block number assigned as the PUCCH resource block to which the young resource block number is assigned.
- Resource blocks are configured to be assigned as A / N transmission resource blocks and SR transmission resource blocks.
- push-HoppingOffset is the number of resource blocks that can be allocated as PUCCH resource blocks
- N RB (2) is the number of resource blocks that can be allocated as CQI transmission resource blocks.
- CQI, A / N are CQI transmission resource blocks, A / N transmission resource blocks, and SR transmission resource blocks.
- N and SR mixed resource blocks may exist.
- the notification unit 12 may be configured to notify “push-HoppingOffset” and “N RB (2) ” as common values in each cell under the radio base station eNB.
- the resource allocator 11 assigns to each mobile station UE a frequency direction resource (resource block) and code direction resource (resource block) allocated as CQI transmission resources from among the resource blocks allocated as PUCCH resource blocks. CS).
- a resource index is assigned to a code direction resource (CS) that can be allocated as a CQI transmission resource in one subframe.
- CS code direction resource
- Such a resource index is configured to be continuously assigned across a plurality of resource blocks within one subframe.
- the notification unit 12 notifies each mobile station UE of a resource index, and each mobile station UE transmits a CQI using a CQI transmission resource (PUCCH) specified by the notified resource index. It is configured.
- twelve code direction resources (CS) can be multiplexed within one frequency direction resource (resource block).
- resource block # 1 the resource index assigned to the CQI transmission resource starts from “12”.
- CS code direction resource
- a / N and SR mixed resource block #N RB (2) , as shown in FIG. 8, a code direction resource (CS) that can be allocated as a CQI transmission resource, an A / N transmission resource, and There are code direction resources (CS) that can be allocated as SR transmission resources.
- N CS (1) is the number of code direction resources (CS) that can be allocated as A / N transmission resources and SR transmission resources in the CQI, A / N, and SR mixed resource blocks, It is a multiple of ⁇ shift .
- the resource index assigned to the CQI transmission resource and the resource index assigned to the A / N transmission resource and the SR transmission resource are different.
- code direction resources can be multiplexed within one frequency direction resource (resource block) as an A / N transmission resource and an SR transmission resource, and one Within the code direction resource (CS), three OCs (orthogonal codes) can be multiplexed.
- a guard code direction resource is provided. Further, the guard code direction resource (CS) may be provided between code direction resources (CS) that can be allocated as CQI transmission resources.
- the resource allocation unit 11 determines the time direction resource (subframe) and the frequency direction resource (resource block) to be allocated as the CQI transmission resource, and then finally sets the code direction resource (CS) to be allocated as the CQI transmission resource.
- the allocation of CQI transmission resources within the same frequency direction resource (resource block) can be reduced, and the increase in interference can be suppressed as much as possible.
- the resource allocation unit 11 determines a frequency direction resource (resource block) to be allocated as a CQI transmission resource based on the usage status of the code direction resource (CS) in each frequency direction resource (resource block). It may be configured.
- the resource allocation unit 11 allocates the CQI transmission resources in order from the frequency direction resource (resource block) in which the number of code direction resources (CS) in use is small in each time direction resource (subframe). It may be configured.
- the resource allocation unit 11 allocates the CQI transmission resources in order from the frequency direction resource (resource block) having the largest number of usable code direction resources (CS) in each time direction resource (subframe). It may be configured.
- the resource allocation unit 11 is configured to allocate the CQI transmission resource in order from the frequency direction resource (resource block) in which the usage rate of the code direction resource (CS) is small within each time direction resource (subframe). It may be.
- the usage rate of the code direction resource (CS) is the ratio of the number of code direction resources (CS) in use to the number of code direction resources (CS) for CQI transmission in each frequency direction resource (resource block). is there.
- the resource allocation unit 11 monitors a period that has elapsed since the code direction resource (CS) in each frequency direction resource (resource block) is released by the timer, and in each frequency direction resource (resource block), A code direction resource (CS) that has passed a certain period of time after being released may be configured to be a usable code direction resource (CS).
- the resource allocation unit 11 is configured to allocate indexes to frequency direction resources (resource blocks) that can be allocated as CQI transmission resources in the order of time direction and frequency direction as shown in FIG. Yes.
- the resource allocation unit 11 has a small number of code direction resources (CS) in use (or a large number of usable code direction resources (CS)) in each time direction resource (subframe), or
- the code direction resource (CS) is used in the order of the frequency direction resource (resource block) in order from the low frequency direction resource (CS), but is used in a plurality of frequency direction resources (resource blocks). If the number of code direction resources (CS) of the same (or the number of usable code direction resources or the usage rate of code direction resources (CS)) is the same, the frequency direction resource (resource block) having the smallest index Are assigned as CQI transmission resources.
- the resource allocation unit 11 may be configured to allocate resources as CQI transmission resources in order from frequency direction resources (resource blocks) belonging to the inner frequency band within the system bandwidth. .
- the frequency band of the system is the 2 GHz band, but as shown in FIG.
- the frequency band is 800 MHz, there is a possibility that the transmission signal from the mobile station UE is distorted due to the influence of the transmission filter of the mobile station UE, and sufficient quality cannot be obtained at the radio base station eNB.
- the resource allocation unit 11 divides frequency direction resources (resource blocks) into inner band resource blocks (resource blocks # 0 to # 19) belonging to the inner frequency band within the system bandwidth, It is classified into outer band resource blocks (resource blocks # 20 to # 39) belonging to the outer frequency band within the system bandwidth, and either an inner band resource block or an outer band resource block is allocated as a CQI transmission resource. It may be configured.
- the resource allocation unit 11 prioritizes the code direction resource in the inner band resource block as the CQI transmission resource until there is no code direction resource (CS) that can be allocated as the CQI transmission resource in the inner band resource block. May be configured to allocate the code direction resources in the outer band resource block.
- CS code direction resource
- the resource allocation unit 11 is configured to allocate the above-described indexes in order from a frequency direction resource (resource block) including subcarriers belonging to the inner frequency band.
- the inner band resource block is used preferentially, it is possible to improve characteristic degradation due to signal distortion in both end bands of the transmission filter of the mobile station UE.
- the resource allocation unit 11 is configured to allocate either the inner band resource block or the outer band resource block as the CQI transmission resource based on the propagation loss in the uplink. Also good.
- the resource allocation unit 11 allocates an inner band resource block as a CQI transmission resource when the uplink propagation loss is larger than a predetermined value, and the uplink propagation loss is smaller than the predetermined value.
- an outer band resource block may be allocated as a CQI transmission resource.
- the resource allocation unit 11 is configured to adjust “N RB GUARD ” that is the number of outer band resource blocks that can be multiplexed in the frequency direction according to the frequency band used in the transmission filter of the mobile station UE. It may be.
- the resource allocation unit 11 sets the number of outer band resource blocks to “0”. It is good also as.
- the resource allocation unit 11 may be configured to intermittently allocate the code direction resource (CS) in each frequency direction resource (resource block).
- the resource allocation unit 11 is configured to thin out and allocate code direction resources (CS) allocated as CQI transmission resources as far as possible in each frequency direction resource (resource block). Yes.
- CS code direction resources
- the resource allocation unit 11 assigns code direction resources (CS) to be allocated as CQI transmission resources to CS # 1 ⁇ CS # 2 ⁇ CS # 3 ⁇ CS # 4 ⁇ CS #. It is configured to be assigned in a round robin order in the order of 5, that is, in the order of indexes assigned to code direction resources (CS).
- CS code direction resources
- the resource allocation part 11 may be comprised so that the above-mentioned code direction resource (CS) for guards may be provided between each code direction resource (CS).
- the resource allocation unit 11 shifts the allocation position of the code direction resource (CS) to which the specific index is assigned from the allocation position of the code direction resource (CS) to which the specific index is assigned in another cell. It may be configured.
- FIG. 15 shows an example of a code direction resource (CS) allocation method in a CQI, A / N, and SR mixed resource block.
- N CS (1) is a code direction resource that can be allocated as an A / N transmission resource and an SR transmission resource within one frequency direction resource (CQI, A / N, SR mixed resource block). Indicates the number of (CS).
- step S101 the radio base station eNB determines whether there is a free resource that can be allocated as a CQI transmission resource in the PUCCH resource.
- the radio base station eNB proceeds to the process of step S102, and when it is determined that such a free resource does not exist, the radio base station eNB fails to allocate a CQI transmission resource. To do.
- step S102 the radio base station eNB obtains the minimum value N min of the code direction resource (CS) in use in the frequency direction resource (resource block) including free resources that can be allocated as CQI transmission resources.
- “n (k)” is a resource usage amount in the resource block #k.
- the radio base station eNB increments “k” by one in step S105 and returns to the operation in step S104.
- the radio base station eNB allocates the resource block #k as a CQI transmission resource in step S106, and assigns “n (k)”.
- m CS (k) is an index in the resource block of the code direction resource (CS) allocated last time in resource block #k
- N CS is one frequency direction resource (resource block). The maximum number of code direction resources (CS) that can be used in
- step S108 the radio base station eNB determines whether or not a code direction resource (CS) whose index in the resource block is “m CS (k)” is free.
- CS code direction resource
- the radio base station eNB repeats the operation of step S108.
- the code direction resource (CS) is allocated as a CQI transmission resource.
- step S201 the radio base station eNB determines whether there is a free resource that can be allocated as a CQI transmission resource in the PUCCH resource.
- the radio base station eNB proceeds to the process of step S202.
- the radio base station eNB fails to allocate a CQI transmission resource. To do.
- step S202 the radio base station eNB obtains the maximum value N max of the code direction resource (CS) that can be used in the frequency direction resource (resource block) including the free resource that can be allocated as the CQI transmission resource.
- CS code direction resource
- “n e (k)” is the resource usage in the resource block #k.
- the radio base station eNB when "n e (k) ⁇ N max" is determined to be established, in step S205, increments only one "k”, and returns to the operation of step S104.
- m CS (k) is an index in the resource block of the code direction resource (CS) allocated last time in resource block #k
- N CS is one frequency direction resource (resource block). The maximum number of code direction resources (CS) that can be used in
- step S208 the radio base station eNB determines whether or not a code direction resource (CS) whose index in the resource block is “m CS (k)” is free.
- CS code direction resource
- the radio base station eNB repeats the operation of step S208.
- the code direction resource (CS) is allocated as a CQI transmission resource.
- step S301 the radio base station eNB determines whether there is a free resource that can be allocated as a CQI transmission resource in the PUCCH resource.
- the radio base station eNB proceeds to the process of step S302, and when it is determined that such a free resource does not exist, the radio base station eNB fails to allocate a CQI transmission resource. To do.
- step S302 the radio base station eNB determines whether there is an available code direction resource (CS) in the inner band resource block.
- CS code direction resource
- the radio base station eNB proceeds to the process of step S303, and when it is determined that there is no usable code direction resource (CS), the process of step S307 Proceed to
- step S303 the radio base station eNB obtains the minimum value N min of the code direction resource (CS) in use in the inner band resource block.
- n (k) is the resource usage in resource block #k
- N F is a frequency direction resource (resource block) that can be multiplexed in the time direction within one time direction resource (subframe).
- N RB GUARD is the number of outer band resource blocks that can be multiplexed in the frequency direction.
- the radio base station eNB increments “k” by one in step S306 and returns to the operation in step S305.
- the radio base station eNB determines that “n (k)> N min ” is not established, the resource block #k is assigned as a CQI transmission resource in step S311, and “n (k)” is assigned. Increment by one.
- step S307 the radio base station eNB obtains the minimum value N min of the code direction resource (CS) in use in the outer band resource block.
- the radio base station eNB increments “k” by one in step S310 and returns to the operation in step S309.
- the radio base station eNB determines that “n (k)> N min ” is not established, the resource block #k is assigned as a CQI transmission resource in step S311, and “n (k)” is assigned. Increment by one.
- m CS (k) is an index in the resource block of the code direction resource (CS) allocated last time in resource block #k, and “N CS ” can be used in one resource block. This is the maximum number of CSs.
- step S313 the radio base station eNB determines whether or not a code direction resource (CS) whose index in the resource block is “m CS (k)” is free.
- CS code direction resource
- the radio base station eNB repeats the operation of step S312 and when it is determined that the code direction resource (CS) is free, in step S314,
- the code direction resource (CS) is allocated as a CQI transmission resource.
- step S401 the radio base station eNB determines whether there is a free resource that can be allocated as a CQI transmission resource in the PUCCH resource.
- the radio base station eNB proceeds to the process of step S402.
- the radio base station eNB fails to allocate a resource for CQI transmission. To do.
- step S402 the radio base station eNB determines whether or not the propagation loss in the uplink is larger than the threshold value.
- the operation proceeds to the process of step S403. In other cases, the operation proceeds to the process of step S408. move on.
- step S403 the radio base station eNB determines whether there is a usable code direction resource (CS) in the inner band resource block.
- CS usable code direction resource
- the radio base station eNB determines that there is a usable code direction resource (CS) in the inner band resource block, the radio base station eNB proceeds to the process of step S404 and determines that there is no usable code direction resource (CS). If so, the process proceeds to step S409.
- CS usable code direction resource
- step S408 the radio base station eNB determines whether there is a usable code direction resource (CS) in the outer band resource block.
- CS usable code direction resource
- the radio base station eNB When it is determined that there is a usable code direction resource (CS) in the outer band resource block, the radio base station eNB proceeds to the process of step S409 and determines that there is no usable code direction resource (CS). If so, the process proceeds to step S404.
- CS usable code direction resource
- steps S404 to S407 is the same as the processing of steps S303 to S306 shown in FIG. 18, the processing of steps S409 to S412 is the same as the processing of steps S307 to S310 shown in FIG. 18, and step S413.
- steps S416 are the same as steps S311 to S314 shown in FIG.
- the resource allocation unit 11 of the radio base station eNB allocates time direction resources (subframes) and frequency direction resources (resource blocks) to be allocated as CQI transmission resources. Since the code direction resource (CS) to be allocated as the CQI transmission resource is determined last after the determination, the allocation of the CQI transmission resource in the same frequency direction resource (resource block) is reduced, and interference is caused. Can be suppressed as much as possible.
- the inner band resource block is used preferentially, the characteristic degradation due to signal distortion in the both end bands of the transmission filter of the mobile station UE is improved. Can do.
- the inner band resource block is preferentially used or the outer band resource block is preferentially used according to the propagation loss in the uplink. Since it is possible to switch whether to use, in a specific frequency direction resource (resource block), it is possible to avoid a situation where the allocation of CQI transmission resources is concentrated, and to suppress an increase in interference as much as possible, and It is possible to improve characteristic deterioration due to signal distortion in both end bands of the transmission filter of the mobile station UE.
- a first feature of the present embodiment is a radio base station eNB, which is a time direction resource allocated as a CQI transmission resource (reception quality notification resource) to be used for transmitting a CQI to each mobile station UE
- a resource allocation unit 11 configured to determine (subframe), a frequency direction resource (resource block), and a code direction resource (CS), and the resource allocation unit 11 allocates time as a CQI transmission resource
- the gist is that the code direction resource (CS) to be allocated as the CQI transmission resource is determined after the direction resource (subframe) and the frequency direction resource (resource block) are determined.
- the resource allocation unit 11 allocates a frequency direction resource (resource block) as a CQI transmission resource based on the usage status of the code direction resource (CS) in each frequency direction resource (resource block). ) May be determined.
- the resource allocation unit 11 sequentially starts with frequency direction resources (resource blocks) having a small number of code direction resources (CS) in use in each time direction resource (subframe). You may be comprised so that it may allocate as a resource for CQI transmission.
- frequency direction resources resource blocks
- CS code direction resources
- the resource allocation unit 11 sequentially starts from a frequency direction resource (resource block) having a larger number of usable code direction resources (CS) in each time direction resource (subframe). You may be comprised so that it may allocate as a resource for CQI transmission.
- the resource allocation unit 11 transmits CQI transmissions in order from a frequency direction resource (resource block) with a smaller code direction resource (CS) usage rate in each time direction resource (subframe). It may be configured to allocate as a trusted resource.
- CS code direction resource
- the resource allocation unit 11 uses, in each frequency direction resource (resource block), a code direction resource (CS) that has been released for a certain period of time after being released, ).
- CS code direction resource
- the resource allocation unit 11 may be configured to allocate the CQI transmission resource in order from the frequency direction resource (resource block) belonging to the inner frequency band within the system bandwidth. Good.
- the resource allocation unit 11 divides resource blocks into inner band frequency direction resources (inner band resource blocks) belonging to the inner frequency band in the system bandwidth and outer areas in the system bandwidth. Is classified into an outer band frequency direction resource (outer band resource block) belonging to the frequency band of, and based on the propagation loss in the uplink, as a CQI transmission resource, an inner band frequency direction resource (inner band resource block) or an outer band It may be configured to allocate any of the frequency direction resources (outer band resource blocks).
- the resource allocation unit 11 may be configured to intermittently allocate the code direction resource (CS) in each frequency direction resource (resource block).
- the resource allocation unit 11 assigns the allocation position of the code direction resource (CS) to which the specific index is assigned, to the code direction resource (CS) to which the specific index is assigned in another cell. ) May be shifted from the assigned position.
- a second feature of the present embodiment is a mobile communication method, in which time direction resources (subframes) and frequency direction resources to be allocated as CQI transmission resources to be used for transmitting CQIs to each mobile station UE Step A for determining (resource block) and code direction resource (CS), time direction resource (subframe), frequency direction resource (resource block), and code direction resource (CS) allocated as CQI transmission resources
- step A after determining a time direction resource (subframe) and a frequency direction resource (resource block) to be allocated as CQI transmission resources, for CQI transmission Determining code direction resources (CS) to allocate as resources The gist.
- radio base station eNB and the mobile station UE described above may be implemented by hardware, may be implemented by a software module executed by a processor, or may be implemented by a combination of both. .
- Software modules include RAM (Random Access Memory), flash memory, ROM (Read Only Memory), EPROM (Erasable Programmable ROM), EEPROM (Electronically Erasable and Programmable, Removable ROM, and Hard Disk). Alternatively, it may be provided in a storage medium of an arbitrary format such as a CD-ROM.
- the storage medium is connected to the processor so that the processor can read and write information from and to the storage medium. Further, such a storage medium may be integrated in the processor. Further, such a storage medium and a processor may be provided in the ASIC. Such an ASIC may be provided in the radio base station eNB or the mobile station UE. Further, the storage medium and the processor may be provided as a discrete component in the radio base station eNB or the mobile station UE.
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- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Signal Processing (AREA)
- Quality & Reliability (AREA)
- Mobile Radio Communication Systems (AREA)
- Time-Division Multiplex Systems (AREA)
Abstract
Description
図1乃至図15を参照して、本発明の第1の実施形態に係る移動通信システムの構成について説明する。
以下、図16乃至図19を参照して、本実施形態に係る移動通信システムの動作について、具体的には、本実施形態に係る無線基地局eNBによるCQI送信用リソースの割り当て動作について説明する。
本発明の第1の実施形態に係る移動通信システムによれば、無線基地局eNBのリソース割当部11が、CQI送信用リソースとして割り当てる時間方向リソース(サブフレーム)及び周波数方向リソース(リソースブロック)を決定した後、CQI送信用リソースとして割り当てるコード方向リソース(CS)を最後に決定するように構成されているため、同一の周波数方向リソース(リソースブロック)内におけるCQI送信用リソースの割り当てを減らし、干渉の増大を極力少なく抑えることができる。
Claims (11)
- 各移動局に対して、下りリンクにおける受信品質を通知するために用いるべき受信品質通知用リソースとして割り当てる時間方向リソースと周波数方向リソースとコード方向リソースとを決定するように構成されているリソース割当部を具備し、
前記リソース割当部は、前記受信品質通知用リソースとして割り当てる時間方向リソース及び周波数方向リソースを決定した後、該受信品質通知用リソースとして割り当てるコード方向リソースを決定するように構成されていることを特徴とする無線基地局。 - 前記リソース割当部は、各周波数方向リソースにおけるコード方向リソースの使用状況に基づいて、前記受信品質通知用リソースとして割り当てる周波数方向リソースを決定するように構成されていることを特徴とする請求項1に記載の無線基地局。
- 前記リソース割当部は、各時間方向リソース内において、使用中のコード方向リソースの数が少ない周波数方向リソースから順に、前記受信品質通知用リソースとして割り当てるように構成されていることを特徴とする請求項2に記載の無線基地局。
- 前記リソース割当部は、各時間方向リソース内において、使用可能なコード方向リソースの数が多い周波数方向リソースから順に、前記受信品質通知用リソースとして割り当てるように構成されていることを特徴とする請求項2に記載の無線基地局。
- 前記リソース割当部は、各時間方向リソース内において、コード方向リソースの使用率が小さい周波数方向リソースから順に、前記受信品質通知用リソースとして割り当てるように構成されていることを特徴とする請求項2に記載の無線基地局。
- 前記リソース割当部は、各周波数方向リソースにおいて、解放された後に一定期間経過したコード方向リソースを、前記使用可能なコード方向リソースとするように構成されていることを特徴とする請求項3に記載の無線基地局。
- 前記リソース割当部は、システム帯域幅内における内側の周波数帯域に属する周波数方向リソースから順に、前記受信品質通知用リソースとして割り当てるように構成されていることを特徴とする請求項1に記載の無線基地局。
- 前記リソース割当部は、周波数方向リソースを、システム帯域幅内における内側の周波数帯域に属する内側帯域周波数方向リソースと、該システム帯域幅内における外側の周波数帯域に属する外側帯域周波数方向リソースとに分類し、前記上りリンクにおける伝搬損失に基づいて、前記受信品質通知用リソースとして、該内側帯域周波数方向リソース又は該外側帯域周波数方向リソースのいずれかを割り当てるように構成されていることを特徴とする請求項1に記載の無線基地局。
- 前記リソース割当部は、各周波数方向リソースにおけるコード方向リソースを、間欠的に割り当てるように構成されていることを特徴とする請求項1に記載の無線基地局。
- 前記リソース割当部は、特定インデックスが付与されているコード方向リソースの割り当て位置を、他セルにおける該特定インデックスが付与されているコード方向リソースの割り当て位置からずらすように構成されていることを特徴とする請求項1に記載の無線基地局。
- 各移動局に対して、下りリンクにおける受信品質を通知するために用いるべき受信品質通知用リソースとして割り当てる時間方向リソースと周波数方向リソースとコード方向リソースとを決定する工程Aと、
前記受信品質通知用リソースとして割り当てられた前記時間方向リソースと前記周波数方向リソースと前記コード方向リソースとを、各移動局に対して通知する工程Bとを有し、
前記工程Aにおいて、前記受信品質通知用リソースとして割り当てる時間方向リソース及び周波数方向リソースを決定した後、該受信品質通知用リソースとして割り当てるコード方向リソースを決定することを特徴とする移動通信方法。
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EP20100756079 EP2413652A1 (en) | 2009-03-25 | 2010-03-24 | Radio base station and mobile communication method |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140092859A1 (en) * | 2011-09-01 | 2014-04-03 | Sony Corporation | Communication device, communication method, communication system, and base station |
CN103763779A (zh) * | 2012-01-18 | 2014-04-30 | 中兴通讯股份有限公司 | 一种长期演进系统中分配资源块组的方法及装置 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN102448175B (zh) * | 2012-01-18 | 2015-08-12 | 中兴通讯股份有限公司 | 一种长期演进系统中分配资源块组的方法及装置 |
EP2986070B1 (en) * | 2014-06-09 | 2018-03-07 | Huawei Technologies Co., Ltd. | Signal transmission method and user equipment |
US9680620B2 (en) | 2014-06-09 | 2017-06-13 | Huawei Technologies Co., Ltd. | Signal transmission method and user equipment |
WO2017034238A1 (ko) * | 2015-08-21 | 2017-03-02 | 엘지전자 주식회사 | 무선 통신 시스템에서 채널 상태 정보를 송수신하는 방법 및 이를 위한 장치 |
JP6724960B2 (ja) * | 2018-09-14 | 2020-07-15 | 株式会社安川電機 | リソース監視システム、リソース監視方法、及びプログラム |
WO2020165999A1 (ja) * | 2019-02-14 | 2020-08-20 | 株式会社Nttドコモ | ユーザ端末 |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007148583A1 (ja) * | 2006-06-19 | 2007-12-27 | Ntt Docomo, Inc. | 移動通信システムで使用される基地局、ユーザ装置及び方法 |
WO2009022566A1 (ja) * | 2007-08-10 | 2009-02-19 | Nec Corporation | 無線通信方法、無線通信システム、基地局、移動局、及びプログラム |
WO2009022464A1 (ja) * | 2007-08-13 | 2009-02-19 | Panasonic Corporation | 無線送信装置及び無線送信方法 |
WO2009022704A1 (ja) * | 2007-08-14 | 2009-02-19 | Ntt Docomo, Inc. | ユーザ装置、基地局及び上りリンク制御チャネル構成方法 |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0978958B1 (en) * | 1997-04-24 | 2010-07-21 | Ntt Mobile Communications Network Inc. | Mobile communication method and mobile communication system |
CN101218770B (zh) * | 2005-07-08 | 2015-07-15 | 富士通株式会社 | 无线资源分配方法、通信装置 |
KR101457685B1 (ko) * | 2007-08-10 | 2014-11-03 | 삼성전자주식회사 | 셀룰러 무선 통신 시스템에서 애크/내크의 송수신 방법 및 장치 |
US20090201871A1 (en) * | 2008-02-12 | 2009-08-13 | Qualcomm, Incorporated | Efficient utilization of channel resources in wireless communication |
US8315217B2 (en) * | 2008-09-23 | 2012-11-20 | Qualcomm Incorporated | Method and apparatus for controlling UE emission in a wireless communication system |
-
2009
- 2009-03-25 JP JP2009075215A patent/JP5222765B2/ja active Active
-
2010
- 2010-03-24 US US13/258,982 patent/US20120057563A1/en not_active Abandoned
- 2010-03-24 CN CN2010800135189A patent/CN102365893A/zh active Pending
- 2010-03-24 WO PCT/JP2010/055018 patent/WO2010110283A1/ja active Application Filing
- 2010-03-24 EP EP20100756079 patent/EP2413652A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2007148583A1 (ja) * | 2006-06-19 | 2007-12-27 | Ntt Docomo, Inc. | 移動通信システムで使用される基地局、ユーザ装置及び方法 |
WO2009022566A1 (ja) * | 2007-08-10 | 2009-02-19 | Nec Corporation | 無線通信方法、無線通信システム、基地局、移動局、及びプログラム |
WO2009022464A1 (ja) * | 2007-08-13 | 2009-02-19 | Panasonic Corporation | 無線送信装置及び無線送信方法 |
WO2009022704A1 (ja) * | 2007-08-14 | 2009-02-19 | Ntt Docomo, Inc. | ユーザ装置、基地局及び上りリンク制御チャネル構成方法 |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20140092859A1 (en) * | 2011-09-01 | 2014-04-03 | Sony Corporation | Communication device, communication method, communication system, and base station |
US9450740B2 (en) * | 2011-09-01 | 2016-09-20 | Sony Corporation | Communication device to arrange an extension control area in a subframe according to a periodic mapping pattern |
US9853798B2 (en) | 2011-09-01 | 2017-12-26 | Sony Corporation | Communication device, communication method, communication system, and base station for counting a number of frames |
CN103763779A (zh) * | 2012-01-18 | 2014-04-30 | 中兴通讯股份有限公司 | 一种长期演进系统中分配资源块组的方法及装置 |
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