CN108012331B - Resource allocation method and base station in LTE uplink multi-user virtual MIMO system - Google Patents
Resource allocation method and base station in LTE uplink multi-user virtual MIMO system Download PDFInfo
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- CN108012331B CN108012331B CN201610932496.5A CN201610932496A CN108012331B CN 108012331 B CN108012331 B CN 108012331B CN 201610932496 A CN201610932496 A CN 201610932496A CN 108012331 B CN108012331 B CN 108012331B
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- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/04—Wireless resource allocation
- H04W72/044—Wireless resource allocation based on the type of the allocated resource
- H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B7/00—Radio transmission systems, i.e. using radiation field
- H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
- H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
- H04B7/0413—MIMO systems
- H04B7/0452—Multi-user MIMO systems
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
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- H04W72/50—Allocation or scheduling criteria for wireless resources
- H04W72/53—Allocation or scheduling criteria for wireless resources based on regulatory allocation policies
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Abstract
The invention provides a resource allocation method and a base station in an LTE uplink multi-user virtual MIMO system. The method comprises the following steps: judging whether the current utilization rate of an uplink physical resource block of a cell accessed to new user equipment is in a preset range; if so, estimating a first uplink rate obtained after the UE is allocated with the residual physical resource blocks of the cell according to the TBS index of the UE and the number of the residual physical resource blocks of the cell; estimating each uplink rate of the UE and each user equipment after using the same physical resource block according to the TBS index of the UE and each user equipment of the scheduled physical resource block of the cell after using the same physical resource block and the number of the residual physical resource blocks of the cell; selecting user equipment paired with the UE according to the uplink rates and the physical resource block occupancy rates of the UE and the user equipment when the UE and the user equipment use the same physical resource block; and allocating a physical resource block for the UE to carry out data transmission according to the comparison result of the uplink rate corresponding to the user equipment and the first uplink rate.
Description
Technical Field
The invention relates to the technical field of wireless communication, in particular to a resource allocation method and a base station in an LTE uplink multi-user virtual MIMO system.
Background
The existing multi-user virtual MIMO (Multiple-Input Multiple-Output) technology refers to that a base station performs weighting and combining operations with different weights on signals on receiving antennas through the receiving antennas to obtain Multiple estimated values of signals of different user equipment, and performs multi-user detection on user equipment multiplexing the same time-frequency resource, thereby achieving the effect that the Multiple user equipment transmits data in the same time-frequency resource. The multi-user virtual MIMO obtains diversity gain and array gain as well as multiplexing gain brought by the same time-frequency resources used by multi-user equipment.
The existing multi-user virtual MIMO technical scheme does not fully consider efficient utilization of a limited air interface Physical Resource Block (PRB) when multiplexing the same time-frequency Resource, so that the multi-user virtual MIMO technical scheme has a limited application effect in an uplink air interface-limited TD-LTE network.
The inventor of the present application finds that, when multiplexing time-frequency resources, the multi-user virtual MIMO technical scheme may allow a user equipment to use a physical resource block allocated to other user equipments, and may also allow the user equipment to use a remaining unallocated physical resource block of a cell. Therefore, how to ensure that the user equipment in the multi-user virtual MIMO technical scheme can allocate the physical resource block with better conditions, so that the utilization rate of the air interface physical resource block of the cell is improved, and the uplink throughput of the cell can also be improved. Therefore, an allocation scheme of physical resource blocks can be designed.
Disclosure of Invention
The invention aims to provide a resource allocation method and a base station in an LTE uplink multi-user virtual MIMO system. The method solves the technical problems that: how to ensure that user equipment in a multi-user virtual MIMO system can allocate physical resource blocks with better conditions, so that the utilization rate of air interface physical resource blocks of a cell can be improved, and meanwhile, the uplink throughput of the cell can also be improved.
In order to achieve the above object, the present invention provides a resource allocation method in an LTE uplink multi-user virtual MIMO system. The method comprises the following steps:
when User Equipment (UE) of data to be transmitted accesses a cell, judging whether the current utilization rate of an uplink physical resource block of the cell is within a preset range;
under the condition that the current utilization rate of the uplink physical resource block of the cell is judged to be within a preset range, estimating a first uplink rate obtained after the UE is allocated to the remaining uplink physical resource block of the cell according to the Transmission Block Size (TBS) index of the UE and the number of the remaining uplink physical resource blocks which can be allocated to the cell;
estimating second uplink rates of the UE and the user equipment after using the same physical resource block according to the TBS index of the UE and the user equipment of the cell scheduled uplink physical resource block after using the same physical resource block and the number of the residual uplink physical resource blocks which can be allocated in the cell;
selecting first user equipment paired with the UE according to the second uplink rates and the physical resource block occupancy rates of the UE and the user equipment when the UE and the user equipment use the same physical resource block respectively;
and allocating a physical resource block for the UE to perform uplink data transmission according to a comparison result of a second uplink rate corresponding to the first user equipment and the first uplink rate.
Optionally, the lower limit value of the preset range is a preset threshold value, and the method further includes:
and under the condition that the current utilization rate of the uplink physical resource blocks of the cell is judged to be less than or equal to the preset threshold value, distributing the residual uplink physical resource blocks which can be distributed in the cell to the UE.
Optionally, the upper limit value of the preset range is 100%, and the method further includes:
under the condition that the current utilization rate of the uplink physical resource block of the cell is judged to be 100%, judging whether the user equipment of the scheduled uplink physical resource block of the cell has second paired user equipment;
under the condition that it is judged that the user equipment of the cell scheduled uplink physical resource block does not have the paired second user equipment, estimating third uplink rates of the UE and the user equipment of the second user equipment which does not have the paired second user equipment after using the same physical resource block according to TBS indexes of the UE and the user equipment of the second user equipment which does not have the paired second user equipment after using the same physical resource block;
and selecting third user equipment matched with the UE according to the third uplink rates and the physical resource block occupancy rates of the UE and the user equipment without the matched second user equipment when the UE uses the same physical resource block, and allocating the physical resource block used by the third user equipment to the UE for uplink data transmission.
Optionally, the selecting, according to the second uplink rates and the physical resource block occupancy rates of the UE and the user equipments respectively when using the same physical resource block, a first user equipment paired with the UE includes:
judging the maximum value in each second uplink rate and the number of the same maximum values;
and under the condition that the number of the same maximum values is judged to be larger than 1, selecting the fourth user equipment with the minimum physical resource block occupancy rate from the fourth user equipment corresponding to the maximum values as the first user equipment paired with the UE.
Optionally, the allocating, according to a comparison result between a second uplink rate corresponding to the first user equipment and the first uplink rate, a physical resource block to the UE for uplink data transmission includes:
under the condition that the second uplink rate is greater than the first uplink rate, allocating a physical resource block used by the first user equipment to the UE for uplink data transmission;
under the condition that the second uplink rate is less than the first uplink rate, allocating the remaining allocable uplink physical resource blocks of the cell to the UE for uplink data transmission;
and under the condition that the second uplink rate is equal to the first uplink rate, allocating the remaining allocable uplink physical resource blocks of the cell to the UE for uplink data transmission or allocating the physical resource blocks used by the first user equipment to the UE for uplink data transmission.
Correspondingly, the invention also provides a base station. The base station includes:
the device comprises a judging unit and a processing unit, wherein the judging unit is used for judging whether the current utilization rate of an uplink physical resource block of a cell is in a preset range when User Equipment (UE) of data to be transmitted accesses the cell;
a first pre-estimating unit, configured to, when it is determined that the current usage rate of the uplink physical resource block of the cell is within a preset range, pre-estimate a first uplink rate obtained after the UE allocates the remaining uplink physical resource blocks of the cell according to a transport block size TBS index of the UE and the number of remaining uplink physical resource blocks that can be allocated in the cell;
a second pre-estimating unit, configured to pre-estimate, according to the TBS index of each user equipment using the same physical resource block and the number of remaining uplink physical resource blocks that can be allocated in the cell, that the UE and each user equipment have scheduled uplink physical resource blocks in the cell use the same physical resource block, second uplink rates of the UE and each user equipment using the same physical resource block;
a selecting unit, configured to select a first user equipment paired with the UE according to the second uplink rates and the physical resource block occupancy rates of the UE and the user equipments when the UE and the user equipments use the same physical resource block;
and the allocating unit is used for allocating a physical resource block for the UE to perform uplink data transmission according to a comparison result of a second uplink rate corresponding to the first user equipment and the first uplink rate.
Optionally, the lower limit value of the preset range is a preset threshold value, and the base station further includes:
and a first allocation unit, configured to allocate, to the UE, the remaining uplink physical resource blocks that can be allocated to the cell when it is determined that the current usage rate of the uplink physical resource blocks of the cell is less than or equal to the preset threshold value.
Optionally, the upper limit of the preset range is 100%, and the base station further includes:
the second allocating unit is configured to, when it is determined that the current usage rate of the uplink physical resource block of the cell is 100%, determine whether each user equipment of the scheduled uplink physical resource block of the cell has a paired second user equipment; under the condition that it is judged that the user equipment of the cell scheduled uplink physical resource block does not have the paired second user equipment, estimating third uplink rates of the UE and the user equipment of the second user equipment which does not have the paired second user equipment after using the same physical resource block according to TBS indexes of the UE and the user equipment of the second user equipment which does not have the paired second user equipment after using the same physical resource block; and selecting third user equipment matched with the UE according to the third uplink rates and the physical resource block occupancy rates of the UE and the user equipment without the matched second user equipment when the UE uses the same physical resource block, and allocating the physical resource block used by the third user equipment to the UE for uplink data transmission.
Optionally, the selecting unit is specifically configured to:
judging the maximum value in each second uplink rate and the number of the same maximum values;
and under the condition that the number of the same maximum values is judged to be larger than 1, selecting the fourth user equipment with the minimum physical resource block occupancy rate from the fourth user equipment corresponding to the maximum values as the first user equipment paired with the UE.
Optionally, the allocation unit is specifically configured to:
under the condition that the second uplink rate is greater than the first uplink rate, allocating a physical resource block used by the first user equipment to the UE for uplink data transmission;
under the condition that the second uplink rate is less than the first uplink rate, allocating the remaining allocable uplink physical resource blocks of the cell to the UE for uplink data transmission;
and under the condition that the second uplink rate is equal to the first uplink rate, allocating the remaining allocable uplink physical resource blocks of the cell to the UE for uplink data transmission or allocating the physical resource blocks used by the first user equipment to the UE for uplink data transmission.
According to the technical scheme, when User Equipment (UE) of data to be transmitted accesses a cell, whether the current utilization rate of an uplink physical resource block of the cell is within a preset range is judged; if so, estimating a first uplink rate obtained after the UE is allocated with the residual uplink physical resource blocks of the cell according to the TBS index of the UE and the number of the residual uplink physical resource blocks which can be allocated in the cell; estimating second uplink rates of the UE and each user equipment after using the same physical resource block according to TBS indexes of the UE and each user equipment of the scheduled uplink physical resource block of the cell after using the same physical resource block and the number of the residual uplink physical resource blocks which can be allocated in the cell; selecting first user equipment matched with the UE according to the second uplink rates and the physical resource block occupancy rates of the UE and the user equipment when the UE and the user equipment use the same physical resource block respectively; and then, allocating a physical resource block to the UE for uplink data transmission according to a comparison result of a second uplink rate corresponding to the first user equipment and the first uplink rate, so that the user equipment in the multi-user virtual MIMO system can be guaranteed to be allocated with the physical resource block with better conditions, and the utilization rate of an air interface physical resource block of a cell can be improved while the uplink throughput of the cell can be improved.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from these without inventive effort.
Fig. 1 is a flowchart of a resource allocation method in an LTE uplink multi-user virtual MIMO system according to an embodiment of the present invention;
fig. 2 is a flowchart of a resource allocation method in an LTE uplink multi-user virtual MIMO system according to another embodiment of the present invention;
fig. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a base station according to another embodiment of the present invention;
fig. 5 is a schematic structural diagram of a base station according to another embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Some words mentioned in the examples of the present invention are exemplified below.
User Equipment (UE) mentioned in the embodiments of the present invention is a device such as a mobile terminal or a Personal Computer (PC). Such as a smart phone, a Personal Digital Assistant (PDA), a tablet computer, a laptop computer, a car computer (carputer), a handheld game console, smart glasses, a smart watch, a wearable device, a virtual display device or a display enhancement device (e.g., Google Glass, Oculus Rift, Hololens, Gear VR), etc.
The basic unit of LTE air interface resource allocation is a Physical Resource Block (PRB). One physical resource block PRB includes 12 consecutive subcarriers in the frequency domain and 7 consecutive regular OFDM symbol periods in the time domain. One physical resource block PRB of LTE corresponds to a radio resource with a bandwidth of 180kHz and a duration of 0.5 ms. The subcarrier spacing for LTE is 15kHz, and thus the width of a PRB in the frequency domain is 12 × 15 — 180 kHz. The time length of 7 consecutive OFDM symbol periods is 0.5ms, and each conventional OFDM symbol period is 71.4 μ s.
Fig. 1 is a flowchart of a resource allocation method in an LTE uplink multi-user virtual MIMO system according to an embodiment of the present invention. As shown in fig. 1, a method for allocating resources in an LTE uplink multi-user virtual MIMO system according to an embodiment of the present invention includes:
in step S101, when a UE to transmit data accesses a cell, it is determined whether a current usage rate of an uplink physical resource block of the cell is within a preset range.
When the UE of the data to be transmitted accesses the cell, the base station judges whether the current utilization rate of the uplink physical resource block of the cell is within a preset range, the lower limit value of the preset range is a preset threshold value, and the upper limit value of the preset range is 100%. Specifically, the preset threshold is a utilization threshold of an uplink physical resource block of the cell, and the preset threshold may be configured according to the load of the cell and the requirement of the virtual MIMO, and the value range of the preset threshold is [ 50%, 100% ]. Through the configuration of the preset threshold value, compromise balance can be carried out between the optimal uplink performance of the cell and the processing capacity of the cell.
Next, in step S102, under the condition that the current usage rate of the uplink physical resource block of the cell is determined to be within the preset range, according to the transport block size TBS index of the UE and the number of remaining uplink physical resource blocks that can be allocated to the cell, a first uplink rate obtained after the UE performs allocation of the remaining uplink physical resource blocks of the cell is estimated.
Specifically, the base station selects an MCS (Modulation and Coding Scheme, Modulation and Coding strategy) index according to an uplink signal-to-noise ratio of the UE accessing the cell, further queries a TBS (Transmission Block Size) index corresponding to the MCS index according to an 36.2138.6.1 protocol in the 3GPP protocol, queries a 3GPP protocol 36.2137.1.7.2.1 according to the number of remaining uplink PRBs that can be allocated in the cell, and estimates an uplink rate V1 that can be obtained by resource allocation of the UE to be transmitted in the remaining uplink PRBs in the cell.
More specifically, the method further comprises: and under the condition that the current utilization rate of the uplink physical resource blocks of the cell is judged to be less than or equal to the preset threshold value, distributing the residual uplink physical resource blocks which can be distributed in the cell to the UE.
More specifically, the method further comprises: under the condition that the current utilization rate of the uplink physical resource block of the cell is judged to be 100%, judging whether the user equipment of the scheduled uplink physical resource block of the cell has second paired user equipment; under the condition that it is judged that the user equipment of the cell scheduled uplink physical resource block does not have the paired second user equipment, estimating third uplink rates of the UE and the user equipment of the second user equipment which does not have the paired second user equipment after using the same physical resource block according to TBS indexes of the UE and the user equipment of the second user equipment which does not have the paired second user equipment after using the same physical resource block; and selecting third user equipment matched with the UE according to the third uplink rates and the physical resource block occupancy rates of the UE and the user equipment without the matched second user equipment when the UE uses the same physical resource block, and allocating the physical resource block used by the third user equipment to the UE for uplink data transmission.
And when the base station judges that the current utilization rate of the uplink physical resource blocks of the cell is 100%, the number of the remaining available allocated uplink physical resource blocks of the cell is zero. That is to say, under the condition that the base station knows that the number of the remaining currently allocable uplink physical resource blocks of the cell is zero, according to the TBS indexes of the UE and the user equipments without the paired second user equipments after using the same physical resource block, the third uplink rates of the UE and the user equipments without the paired second user equipments after using the same physical resource block can be estimated. In addition, the UE is allocated with the physical resource block used by the third user equipment, that is, the UE and the third user equipment use the same physical resource block.
Next, in step S103, according to the TBS index of each UE using the same physical resource block with each scheduled uplink physical resource block in the cell and the number of remaining uplink physical resource blocks that can be allocated in the cell, each second uplink rate of each UE using the same physical resource block with each UE is estimated.
The base station selects MCS indexes after the UE performs virtual MIMO resource allocation with each user equipment of the scheduled uplink physical resource block of the cell according to the uplink signal-to-noise ratio of the user equipment accessing the cell, further inquires TBS indexes corresponding to the MCS indexes according to 36.2138.6.1 protocols in 3GPP protocols, inquires 3GPP protocols 36.2137.1.7.2.1 according to the number of the remaining allocable uplink PRBs of the cell, and estimates each uplink rate V21 and V22. It should be noted that, the UE performs virtual MIMO resource allocation with each user equipment of the cell scheduled uplink physical resource block, that is, the UE uses the same physical resource block with each user equipment of the cell scheduled uplink physical resource block.
Then, in step S104, a first user equipment paired with the UE is selected according to the second uplink rates and the physical resource block occupancy rates of the UE and the user equipments when using the same physical resource block.
Specifically, the steps include: judging the maximum value in each second uplink rate and the number of the same maximum values; and under the condition that the number of the same maximum values is judged to be larger than 1, selecting the fourth user equipment with the minimum physical resource block occupancy rate from the fourth user equipment corresponding to the maximum values as the first user equipment paired with the UE.
In a specific embodiment, if the number of the same maximum values in the second uplink rates is 1, the fourth user equipment corresponding to the maximum value is regarded as the first user equipment paired with the UE without considering an occupancy of a physical resource block of the fourth user equipment corresponding to the maximum value. And if the fourth user equipment with the same physical resource block occupancy rate exists in the fourth user equipment corresponding to the maximum value, sequencing the fourth user equipment with the same physical resource block occupancy rate according to the sequence of the numbers of the physical resource blocks from low to high, and confirming the user equipment which finally performs virtual MIMO resource allocation according to a formula m-Mod (PCI, n). Wherein, m is the number of the physical resource block, Mod (,) represents the modulo operation, PCI represents the primary scrambling code of the cell (cell identifier), and n represents the number of the fourth user equipments with the same physical resource block occupancy. If this process is described in terms of a formula notation, then: selecting user equipment with Min { PRB occupancy } in Max { V21, V22 … } user equipment as optimal MIMO matching user equipment, and obtaining the uplink rate V2 which is obtained by the user equipment of the data to be transmitted and the user equipment performing virtual MIMO resource allocation. For n (n >1) users satisfying the Min { PRB occupancy } condition in Max { V21, V22 … } user equipment, sorting the user equipment satisfying the condition according to the sequence of PRB numbers from low to high to obtain U1 and U2 … Un, and confirming the user equipment Um finally performing virtual MIMO according to m ═ Mod (PCI, n).
Finally, in step S105, a physical resource block is allocated to the UE for uplink data transmission according to a comparison result between the second uplink rate corresponding to the first user equipment and the first uplink rate.
Specifically, the steps include: under the condition that the second uplink rate is greater than the first uplink rate, allocating a physical resource block used by the first user equipment to the UE for uplink data transmission; under the condition that the second uplink rate is less than the first uplink rate, allocating the remaining allocable uplink physical resource blocks of the cell to the UE for uplink data transmission; and under the condition that the second uplink rate is equal to the first uplink rate, allocating the remaining allocable uplink physical resource blocks of the cell to the UE for uplink data transmission or allocating the physical resource blocks used by the first user equipment to the UE for uplink data transmission.
More specifically, if the rate V2 is greater than V1, the user equipment to be transmitted and the user equipment with the scheduled physical resource block perform virtual MIMO resource allocation, that is, the user equipment to be transmitted and the user equipment with the scheduled physical resource block use the same PRB for uplink data transmission. And if the speed V2 is less than V1, allocating the remaining uplink PRBs of the cell to the user equipment waiting for data transmission.
In this embodiment, when a UE to transmit data accesses a cell, it is determined whether a current usage rate of an uplink physical resource block of the cell is within a preset range; if so, estimating a first uplink rate obtained after the UE is allocated with the residual uplink physical resource blocks of the cell according to the TBS index of the UE and the number of the residual uplink physical resource blocks which can be allocated in the cell; estimating second uplink rates of the UE and each user equipment after using the same physical resource block according to TBS indexes of the UE and each user equipment of the scheduled uplink physical resource block of the cell after using the same physical resource block and the number of the residual uplink physical resource blocks which can be allocated in the cell; selecting first user equipment matched with the UE according to the second uplink rates and the physical resource block occupancy rates of the UE and the user equipment when the UE and the user equipment use the same physical resource block respectively; and then, allocating a physical resource block to the UE for uplink data transmission according to a comparison result of a second uplink rate corresponding to the first user equipment and the first uplink rate, so that the user equipment in the multi-user virtual MIMO system can be guaranteed to be allocated with the physical resource block with better conditions, and the utilization rate of an air interface physical resource block of a cell can be improved while the uplink throughput of the cell can be improved.
Fig. 2 is a flowchart of a resource allocation method in an LTE uplink multi-user virtual MIMO system according to another embodiment of the present invention. As shown in fig. 2, when there is a need to allocate an uplink physical resource block for a user equipment that wants to transmit data in a cell, it is determined whether the usage rate of the uplink physical resource block in the cell exceeds a threshold. And if the user equipment of the data to be transmitted does not exist in the cell and the uplink physical resource block needs to be allocated, ending the allocation of the physical resource block. If the current uplink PRB utilization rate of the cell is larger than the threshold value, whether the uplink physical resource block allocation of the cell is full needs to be judged. And if the uplink physical resource block allocation of the cell is full, judging whether the virtual MIMO resource pairing is full. And if the virtual MIMO resource pairing is judged to be full, finishing the PRB allocation. And if the virtual MIMO resource pairing is judged to be not full, rates T21 and T22 … which can be obtained by virtual MIMO resource allocation of the user equipment to be transmitted and the user equipment with the scheduled physical resource block are estimated, the optimal pairing user equipment and the related pairing rate T2 are selected, and the user equipment to be transmitted and the selected optimal pairing user equipment perform virtual MIMO resource allocation. If the distribution of the uplink physical resource blocks of the cell is not full, estimating the rate V1 which can be obtained by the user equipment of the data to be transmitted in the distribution of the remaining uplink physical resource blocks of the cell, estimating the rates V21 and V22 which can be obtained by the user equipment of the data to be transmitted and the user equipment of the scheduled physical resource blocks of the cell for virtual MIMO resource distribution, selecting the optimal matched user equipment and the related matched rate V2, and if V2 is greater than V1, performing virtual MIMO resource distribution on the user equipment of the data to be transmitted and the selected optimal matched user equipment. And if the V2 is smaller than the V1, allocating the remaining physical resource blocks in the cell to the user equipment waiting for transmitting data. And if the current uplink PRB utilization rate of the cell is less than or equal to the threshold value, allocating the remaining physical resource blocks in the cell to the user equipment to be transmitted with data. And the subsequent user equipment to be transmitted carries out a new round of physical resource block allocation on the basis, and the iteration is repeated until the physical resource block and the virtual MIMO resource are allocated completely.
For simplicity of explanation, the method embodiments are described as a series of acts or combinations, but those skilled in the art will appreciate that the embodiments are not limited by the order of acts described, as some steps may occur in other orders or concurrently with other steps in accordance with the embodiments of the invention. Further, those skilled in the art will appreciate that the embodiments described in the specification are presently preferred and that no particular act is required to implement the invention.
Fig. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention. As shown in fig. 3, a base station according to an embodiment of the present invention includes a determining unit 201, a first estimating unit 202, a second estimating unit 203, a selecting unit 204, and a distributing unit 205, where:
a determining unit 201, configured to determine, when a UE to transmit data accesses a cell, whether a current usage rate of an uplink physical resource block of the cell is within a preset range;
a first estimating unit 202, configured to estimate, when it is determined that the current usage rate of the uplink physical resource block of the cell is within a preset range, a first uplink rate obtained after the UE allocates the remaining uplink physical resource blocks of the cell according to the transport block size TBS index of the UE and the number of remaining uplink physical resource blocks that can be allocated in the cell;
a second estimating unit 203, configured to estimate, according to the TBS index of each UE using the same physical resource block and the number of remaining uplink physical resource blocks that can be allocated in the cell, the second uplink rates of each UE using the same physical resource block and each UE using the same physical resource block;
a selecting unit 204, configured to select, according to the second uplink rates and the physical resource block occupancy rates of the UE and the user equipments when the UE and the user equipments use the same physical resource block, a first user equipment paired with the UE;
an allocating unit 205, configured to allocate a physical resource block for the UE to perform uplink data transmission according to a comparison result between a second uplink rate corresponding to the first user equipment and the first uplink rate.
The base station provided in this embodiment is suitable for the resource allocation method in the LTE uplink multi-user virtual MIMO system corresponding to the above embodiment, and is not described herein again.
In the base station provided in this embodiment, when a user equipment UE to transmit data accesses a cell, a determining unit 201 determines whether a current usage rate of an uplink physical resource block of the cell is within a preset range, and when the determining unit 201 determines that the current usage rate of the uplink physical resource block of the cell is within the preset range, a first estimating unit 202 estimates a first uplink rate obtained after the UE allocates remaining uplink physical resource blocks of the cell according to a TBS index of the UE and the number of the remaining allocable uplink physical resource blocks of the cell; then, the second estimating unit 203 estimates each second uplink rate of the UE and each user equipment using the same physical resource block according to the TBS index of each user equipment using the same physical resource block and the number of the remaining uplink physical resource blocks that can be allocated in the cell; thirdly, the selecting unit 204 selects the first user equipment paired with the UE according to the second uplink rates and the physical resource block occupancy rates of the UE and the user equipments when using the same physical resource block; finally, the allocating unit 205 allocates a physical resource block to the UE for uplink data transmission according to a comparison result between the second uplink rate and the first uplink rate corresponding to the first user equipment, which can ensure that the user equipment in the multi-user virtual MIMO system is allocated with a physical resource block with a better condition, so that the utilization rate of an air interface physical resource block of the cell can be improved, and the uplink throughput of the cell can also be improved.
Fig. 4 is a schematic structural diagram of a base station according to another embodiment of the present invention. As shown in fig. 4, the determining unit 301, the first estimating unit 302, the second estimating unit 303, the selecting unit 304, and the allocating unit 305 included in the base station of the present embodiment are respectively the same as the determining unit 201, the first estimating unit 202, the second estimating unit 203, the selecting unit 204, and the allocating unit 205 in the foregoing embodiment, except that the present embodiment further includes a first allocating unit 306 and a second allocating unit 307, where:
a first allocating unit 306, configured to allocate, to the UE, the remaining uplink physical resource blocks that can be allocated to the cell when it is determined that the current usage rate of the uplink physical resource blocks of the cell is less than or equal to the preset threshold;
a second allocating unit 307, configured to determine whether each ue of the scheduled uplink physical resource block of the cell has a paired second ue when it is determined that the current usage rate of the uplink physical resource block of the cell is 100%; under the condition that it is judged that the user equipment of the cell scheduled uplink physical resource block does not have the paired second user equipment, estimating third uplink rates of the UE and the user equipment of the second user equipment which does not have the paired second user equipment after using the same physical resource block according to TBS indexes of the UE and the user equipment of the second user equipment which does not have the paired second user equipment after using the same physical resource block; and selecting third user equipment matched with the UE according to the third uplink rates and the physical resource block occupancy rates of the UE and the user equipment without the matched second user equipment when the UE uses the same physical resource block, and allocating the physical resource block used by the third user equipment to the UE for uplink data transmission.
Further, in an optional embodiment of the disclosure, the selecting unit 304 is specifically configured to:
judging the maximum value in each second uplink rate and the number of the same maximum values;
and under the condition that the number of the same maximum values is judged to be larger than 1, selecting the fourth user equipment with the minimum physical resource block occupancy rate from the fourth user equipment corresponding to the maximum values as the first user equipment paired with the UE.
Further, in an optional embodiment of the disclosure, the allocating unit 305 is specifically configured to:
under the condition that the second uplink rate is greater than the first uplink rate, allocating a physical resource block used by the first user equipment to the UE for uplink data transmission;
under the condition that the second uplink rate is less than the first uplink rate, allocating the remaining allocable uplink physical resource blocks of the cell to the UE for uplink data transmission;
and under the condition that the second uplink rate is equal to the first uplink rate, allocating the remaining allocable uplink physical resource blocks of the cell to the UE for uplink data transmission or allocating the physical resource blocks used by the first user equipment to the UE for uplink data transmission.
By adopting the base station provided by the embodiment, the user equipment in the multi-user virtual MIMO system can be allocated to obtain the physical resource block with better conditions, so that the utilization rate of the air interface physical resource block of the cell is improved, and meanwhile, the uplink throughput of the cell can also be improved.
The principle and technical effect of the base station provided by the above embodiments are the same as those of the corresponding method embodiments, and are not described herein again.
Fig. 5 is a schematic structural diagram of a base station according to another embodiment of the present invention. As shown in fig. 5, the base station includes: a processor (processor)401, a memory (memory)402, a communication Interface (Communications Interface)403, and a communication bus 404;
the processor 401, the memory 402 and the communication interface 403 complete mutual communication through the communication bus 404;
the communication interface 403 is used for information transmission between the base station and the UE;
the processor 401 is configured to call the program instructions in the memory 402 to execute the methods provided by the above-mentioned method embodiments, for example, including: when User Equipment (UE) of data to be transmitted accesses a cell, judging whether the current utilization rate of an uplink physical resource block of the cell is within a preset range; under the condition that the current utilization rate of the uplink physical resource block of the cell is judged to be in a preset range, estimating a first uplink rate obtained after the UE is allocated to the remaining uplink physical resource block of the cell according to the Transmission Block Size (TBS) index of the UE and the number of the remaining uplink physical resource blocks which can be allocated to the cell; estimating second uplink rates of the UE and the user equipment after using the same physical resource block according to the TBS index of the UE and the user equipment of the cell scheduled uplink physical resource block after using the same physical resource block and the number of the residual uplink physical resource blocks which can be allocated in the cell; selecting first user equipment matched with the UE according to the second uplink rates and the physical resource block occupancy rates of the UE and the user equipment when the UE and the user equipment use the same physical resource block respectively; and allocating a physical resource block for the UE to perform uplink data transmission according to a comparison result of a second uplink rate corresponding to the first user equipment and the first uplink rate.
The present embodiment discloses a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the method provided by the above-mentioned method embodiments, for example, comprising: when User Equipment (UE) of data to be transmitted accesses a cell, judging whether the current utilization rate of an uplink physical resource block of the cell is within a preset range; under the condition that the current utilization rate of the uplink physical resource block of the cell is judged to be in a preset range, estimating a first uplink rate obtained after the UE is allocated to the remaining uplink physical resource block of the cell according to the Transmission Block Size (TBS) index of the UE and the number of the remaining uplink physical resource blocks which can be allocated to the cell; estimating second uplink rates of the UE and the user equipment after using the same physical resource block according to the TBS index of the UE and the user equipment of the cell scheduled uplink physical resource block after using the same physical resource block and the number of the residual uplink physical resource blocks which can be allocated in the cell; selecting first user equipment matched with the UE according to the second uplink rates and the physical resource block occupancy rates of the UE and the user equipment when the UE and the user equipment use the same physical resource block respectively; and allocating a physical resource block for the UE to perform uplink data transmission according to a comparison result of a second uplink rate corresponding to the first user equipment and the first uplink rate.
The present embodiments provide a non-transitory computer-readable storage medium storing computer instructions that cause the computer to perform the methods provided by the above method embodiments, for example, including: when User Equipment (UE) of data to be transmitted accesses a cell, judging whether the current utilization rate of an uplink physical resource block of the cell is within a preset range; under the condition that the current utilization rate of the uplink physical resource block of the cell is judged to be in a preset range, estimating a first uplink rate obtained after the UE is allocated to the remaining uplink physical resource block of the cell according to the Transmission Block Size (TBS) index of the UE and the number of the remaining uplink physical resource blocks which can be allocated to the cell; estimating second uplink rates of the UE and the user equipment after using the same physical resource block according to the TBS index of the UE and the user equipment of the cell scheduled uplink physical resource block after using the same physical resource block and the number of the residual uplink physical resource blocks which can be allocated in the cell; selecting first user equipment matched with the UE according to the second uplink rates and the physical resource block occupancy rates of the UE and the user equipment when the UE and the user equipment use the same physical resource block respectively; and allocating a physical resource block for the UE to perform uplink data transmission according to a comparison result of a second uplink rate corresponding to the first user equipment and the first uplink rate.
Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.
The above-described embodiments of the base station and the like are merely illustrative, where the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may also be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present invention, and are not limited thereto; although embodiments of the present invention have been described in detail with reference to the foregoing embodiments, those skilled in the art will understand that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (8)
1. A resource allocation method in an LTE uplink multi-user virtual MIMO system is characterized by comprising the following steps:
when User Equipment (UE) of data to be transmitted accesses a cell, judging whether the current utilization rate of an uplink physical resource block of the cell is within a preset range;
under the condition that the current utilization rate of the uplink physical resource block of the cell is judged to be within a preset range, estimating a first uplink rate obtained after the UE is allocated to the remaining uplink physical resource block of the cell according to the Transmission Block Size (TBS) index of the UE and the number of the remaining uplink physical resource blocks which can be allocated to the cell;
estimating second uplink rates of the UE and the user equipment after using the same physical resource block according to the TBS index of the UE and the user equipment of the cell scheduled uplink physical resource block after using the same physical resource block and the number of the residual uplink physical resource blocks which can be allocated in the cell;
selecting first user equipment paired with the UE according to the second uplink rates and the physical resource block occupancy rates of the UE and the user equipment when the UE and the user equipment use the same physical resource block respectively;
allocating a physical resource block for the UE to perform uplink data transmission according to a comparison result of a second uplink rate corresponding to the first user equipment and the first uplink rate;
the allocating a physical resource block to the UE for uplink data transmission according to a comparison result between a second uplink rate corresponding to the first user equipment and the first uplink rate includes:
under the condition that the second uplink rate is greater than the first uplink rate, allocating a physical resource block used by the first user equipment to the UE for uplink data transmission;
under the condition that the second uplink rate is less than the first uplink rate, allocating the remaining allocable uplink physical resource blocks of the cell to the UE for uplink data transmission;
and under the condition that the second uplink rate is equal to the first uplink rate, allocating the remaining allocable uplink physical resource blocks of the cell to the UE for uplink data transmission or allocating the physical resource blocks used by the first user equipment to the UE for uplink data transmission.
2. The method for allocating resources in an LTE uplink multi-user virtual MIMO system according to claim 1, wherein a lower limit value of the preset range is a preset threshold value, and the method further comprises:
and under the condition that the current utilization rate of the uplink physical resource blocks of the cell is judged to be less than or equal to the preset threshold value, distributing the residual uplink physical resource blocks which can be distributed in the cell to the UE.
3. The method for resource allocation in an LTE uplink multiuser virtual MIMO system according to claim 1, wherein the upper limit value of the preset range is 100%, the method further comprising:
under the condition that the current utilization rate of the uplink physical resource block of the cell is judged to be 100%, judging whether the user equipment of the scheduled uplink physical resource block of the cell has second paired user equipment;
under the condition that it is judged that the user equipment of the cell scheduled uplink physical resource block does not have the paired second user equipment, estimating third uplink rates of the UE and the user equipment of the second user equipment which does not have the paired second user equipment after using the same physical resource block according to TBS indexes of the UE and the user equipment of the second user equipment which does not have the paired second user equipment after using the same physical resource block;
and selecting third user equipment matched with the UE according to the third uplink rates and the physical resource block occupancy rates of the UE and the user equipment without the matched second user equipment when the UE uses the same physical resource block, and allocating the physical resource block used by the third user equipment to the UE for uplink data transmission.
4. The method of claim 1, wherein the selecting the first UE paired with the UE according to the second uplink rates and the physical resource block occupancy rates of the UE and the UE when using the same physical resource blocks respectively comprises:
judging the maximum value in each second uplink rate and the number of the same maximum values;
and under the condition that the number of the same maximum values is judged to be larger than 1, selecting the fourth user equipment with the minimum physical resource block occupancy rate from the fourth user equipment corresponding to the maximum values as the first user equipment paired with the UE.
5. A base station, characterized in that the base station comprises:
the device comprises a judging unit and a processing unit, wherein the judging unit is used for judging whether the current utilization rate of an uplink physical resource block of a cell is in a preset range when User Equipment (UE) of data to be transmitted accesses the cell;
a first pre-estimating unit, configured to, when it is determined that the current usage rate of the uplink physical resource block of the cell is within a preset range, pre-estimate a first uplink rate obtained after the UE allocates the remaining uplink physical resource blocks of the cell according to a transport block size TBS index of the UE and the number of remaining uplink physical resource blocks that can be allocated in the cell;
a second pre-estimating unit, configured to pre-estimate, according to the TBS index of each user equipment using the same physical resource block and the number of remaining uplink physical resource blocks that can be allocated in the cell, that the UE and each user equipment have scheduled uplink physical resource blocks in the cell use the same physical resource block, second uplink rates of the UE and each user equipment using the same physical resource block;
a selecting unit, configured to select a first user equipment paired with the UE according to the second uplink rates and the physical resource block occupancy rates of the UE and the user equipments when the UE and the user equipments use the same physical resource block;
a allocating unit, configured to allocate a physical resource block for the UE to perform uplink data transmission according to a comparison result between a second uplink rate corresponding to the first user equipment and the first uplink rate;
the allocation unit is specifically configured to:
under the condition that the second uplink rate is greater than the first uplink rate, allocating a physical resource block used by the first user equipment to the UE for uplink data transmission;
under the condition that the second uplink rate is less than the first uplink rate, allocating the remaining allocable uplink physical resource blocks of the cell to the UE for uplink data transmission;
and under the condition that the second uplink rate is equal to the first uplink rate, allocating the remaining allocable uplink physical resource blocks of the cell to the UE for uplink data transmission or allocating the physical resource blocks used by the first user equipment to the UE for uplink data transmission.
6. The base station of claim 5, wherein the lower limit of the preset range is a preset threshold, and the base station further comprises:
and a first allocation unit, configured to allocate, to the UE, the remaining uplink physical resource blocks that can be allocated to the cell when it is determined that the current usage rate of the uplink physical resource blocks of the cell is less than or equal to the preset threshold value.
7. The base station of claim 5, wherein the upper limit of the preset range is 100%, and the base station further comprises:
the second allocating unit is configured to, when it is determined that the current usage rate of the uplink physical resource block of the cell is 100%, determine whether each user equipment of the scheduled uplink physical resource block of the cell has a paired second user equipment; under the condition that it is judged that the user equipment of the cell scheduled uplink physical resource block does not have the paired second user equipment, estimating third uplink rates of the UE and the user equipment of the second user equipment which does not have the paired second user equipment after using the same physical resource block according to TBS indexes of the UE and the user equipment of the second user equipment which does not have the paired second user equipment after using the same physical resource block; and selecting third user equipment matched with the UE according to the third uplink rates and the physical resource block occupancy rates of the UE and the user equipment without the matched second user equipment when the UE uses the same physical resource block, and allocating the physical resource block used by the third user equipment to the UE for uplink data transmission.
8. The base station of claim 5, wherein the selecting unit is specifically configured to:
judging the maximum value in each second uplink rate and the number of the same maximum values;
and under the condition that the number of the same maximum values is judged to be larger than 1, selecting the fourth user equipment with the minimum physical resource block occupancy rate from the fourth user equipment corresponding to the maximum values as the first user equipment paired with the UE.
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| CN113286373B (en) * | 2020-02-19 | 2022-11-04 | 大唐移动通信设备有限公司 | Uplink multi-user-multi-input multi-output scheduling method and device |
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