WO2014094239A1 - Vmimo的干扰控制方法及基站设备 - Google Patents

Vmimo的干扰控制方法及基站设备 Download PDF

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Publication number
WO2014094239A1
WO2014094239A1 PCT/CN2012/086853 CN2012086853W WO2014094239A1 WO 2014094239 A1 WO2014094239 A1 WO 2014094239A1 CN 2012086853 W CN2012086853 W CN 2012086853W WO 2014094239 A1 WO2014094239 A1 WO 2014094239A1
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WO
WIPO (PCT)
Prior art keywords
user equipment
scheduling layer
pairing
transmit power
cell
Prior art date
Application number
PCT/CN2012/086853
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English (en)
French (fr)
Inventor
楼群芳
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201280002658.5A priority Critical patent/CN103380578B/zh
Priority to PCT/CN2012/086853 priority patent/WO2014094239A1/zh
Publication of WO2014094239A1 publication Critical patent/WO2014094239A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/18TPC being performed according to specific parameters
    • H04W52/24TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters
    • H04W52/243TPC being performed according to specific parameters using SIR [Signal to Interference Ratio] or other wireless path parameters taking into account interferences
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04BTRANSMISSION
    • H04B7/00Radio transmission systems, i.e. using radiation field
    • H04B7/02Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/0413MIMO systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/18TPC being performed according to specific parameters
    • H04W52/28TPC being performed according to specific parameters using user profile, e.g. mobile speed, priority or network state, e.g. standby, idle or non transmission
    • H04W52/283Power depending on the position of the mobile
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W52/00Power management, e.g. TPC [Transmission Power Control], power saving or power classes
    • H04W52/04TPC
    • H04W52/38TPC being performed in particular situations
    • H04W52/40TPC being performed in particular situations during macro-diversity or soft handoff

Definitions

  • Embodiments of the present invention relate to communication technologies, and in particular, to a virtual multiple input multiple output (Virtual
  • VMIMO Multiple-input Multiple-output
  • MIMO Multiple-input Multiple-output
  • VMIMO technology solves the problem of uplink MIMO well.
  • VMIMO allows two or more user devices to perform virtual binding (hereinafter referred to as pairing, so the following pairing does not involve only two user devices, but may also involve three or more user devices), using the same time-frequency Resources to transfer data.
  • pairing virtual binding
  • SIMO single-input multiple-output
  • the user equipment is interfered by neighboring cells and paired user equipment under VMIMO.
  • SINR Signal to Interference plus Noise Ratio
  • the embodiment of the invention provides a VMIMO interference control method and a base station device, which are used to solve the technical problem that the user equipment throughput has a negative gain and the performance is degraded.
  • an embodiment of the present invention provides a VMIMO interference control method, including: determining whether an edge user equipment exists in a local cell;
  • the determining, by the user, whether an edge user equipment exists includes:
  • the SINR is less than or equal to the first preset threshold, determining that the user equipment is an edge user equipment.
  • the determining, by the user, whether an edge user equipment exists includes:
  • determining that the user equipment is an edge user equipment if the difference between the RSRP of the local cell and the RSRP of the neighboring cell is less than or equal to a second preset threshold.
  • the determining, by the user, whether an edge user equipment exists includes:
  • the pairing probability or the pairing gain of the user equipment is less than the third preset threshold, determining that the user equipment is an edge user equipment.
  • the embodiment of the present invention further provides a VMIMO interference control method, including: receiving an indication message sent by a neighboring cell;
  • the neighboring cell has an edge user equipment, so that when the VMIMO pairing is performed on the user equipment of the cell, the transmit power of each paired user equipment is controlled.
  • the controlling the transmit power of each paired user equipment when performing VMIMO pairing on the user equipment of the cell includes:
  • the user equipment of the first scheduling layer and each candidate user equipment of the second scheduling layer perform VMIMO pairing.
  • the combination of transmit power including:
  • the transmit power of the SIMO is performed for the user equipment of the first scheduling layer, and P is the transmit power of the VMIMO pairing of the user equipment of the first scheduling layer, P M .
  • the determining, according to the determined transmit power of each user equipment Combining, determining a pairing increment value generated when the candidate user equipment performs VMIMO pairing with the user equipment of the first scheduling layer including:
  • transmit power of the VMIMO pairing is a spectral efficiency corresponding to the ⁇
  • the SE is the spectrum efficiency of the VMIMO pairing of the candidate user equipment
  • the SE is the first scheduling transmission power of user equipment is SIMO layer is P TM.
  • Determining an optimal candidate user equipment corresponding to a largest pairing increment value of each pairing increment value and determining an optimal transmission in a combination of the transmit power of the optimal candidate user equipment and the user equipment of the first scheduling layer Power including:
  • the transmission power rate of the VMIMO pairing of the candidate user equipment at time t is the transmission data rate corresponding to PvMM0 ' B , r A (the transmission power of the SIMO of the user equipment of the first scheduling layer at time t)
  • the transmission data rate corresponding to PsiM0 ' A where W is the average transmission data rate of the user equipment of the first scheduling layer in the time period, and is the average transmission data rate of the candidate user equipment in the time period;
  • the optimal candidate user equipment corresponding to the largest paired incremental value of the incremental value, and determining the optimal transmit power in the combination of the transmit power of the optimal candidate user equipment and the user equipment of the first scheduling layer including:
  • an embodiment of the present invention provides a base station device, including:
  • a determining module configured to determine whether an edge user equipment exists in the cell
  • a message sending module configured to send an indication message to the neighboring cell of the local cell, if the cell has an edge user, to notify the serving cell of the neighboring cell that the user equipment of the neighboring cell has an edge user equipment, so that the phase
  • the serving base station of the neighboring cell controls the transmit power of each paired user equipment when performing VMIMO pairing on the user equipment in the neighboring cell after learning that the user equipment exists in the local cell.
  • the determining module is specifically configured to acquire a signal to interference plus noise ratio (SINR) of the user equipment in the local cell, where the SINR is less than or equal to the first preset.
  • SINR signal to interference plus noise ratio
  • the determining module is specifically configured to receive, by the user equipment, the reference signal received power RSRP of the local cell and the RSRP of the neighboring cell, if the The user equipment is an edge user equipment, and the difference between the RSRP of the cell and the RSRP of the neighboring cell is less than or equal to a second preset threshold.
  • the determining module is specifically configured to obtain a pairing probability or a pairing gain of the user equipment in the local cell, if the pairing probability or the pairing gain of the user equipment is less than the third The preset threshold determines that the user equipment is an edge user equipment.
  • the embodiment of the present invention further provides a base station device, including:
  • a message receiving module configured to receive an indication message sent by a neighboring cell
  • the processing module is configured to learn, according to the indication message, that the neighboring cell has an edge user device, to control the transmit power of each paired user equipment when performing VMIMO pairing on the user equipment of the cell.
  • the processing module includes:
  • a first processing unit configured to determine a transmit power combination when the user equipment of the first scheduling layer and each candidate user equipment of the second scheduling layer perform VMIMO pairing;
  • a second processing unit configured to determine, according to the determined transmit power combination of each user equipment, a pairing increment value generated when the candidate user equipment performs VMIMO pairing with the user equipment of the first scheduling layer;
  • a third processing unit configured to determine an optimal candidate user equipment corresponding to a largest pairing increment value of each pairing increment value, and determine a combination of the transmit power of the optimal candidate user equipment and the user equipment of the first scheduling layer Optimal transmit power in ;
  • a fourth processing unit configured to perform VMIMO pairing with the user equipment of the first scheduling layer, and notify the optimal candidate user equipment and the user equipment of the first scheduling layer The optimal transmit power is transmitted.
  • the first processing unit is specifically configured to be used according to
  • the user equipment performs the transmit power of the VMIMO pairing, and i sets the user of the first scheduling layer to y pL B (i)
  • ' ⁇ is the path loss of the candidate user equipment to the neighboring cell'
  • y is the power step.
  • the second processing unit is specifically used
  • the spectrum power of the VMIMO pairing is performed for the user equipment of the first scheduling layer, and the spectrum efficiency corresponding to the VMIMO pairing of the candidate user equipment is the corresponding spectrum efficiency.
  • the SIMO of the user equipment of the first scheduling layer is performed.
  • the transmit power is P.
  • the third processing unit is configured to determine, according to a spectrum efficiency gain of each candidate user equipment and the user equipment of the first scheduling layer, each candidate user equipment and the user equipment of the first scheduling layer.
  • a maximum spectral efficiency gain and determining an optimal candidate user equipment corresponding to the maximum spectral efficiency gain, according to a combination of the transmit power of the optimal candidate user equipment and the user equipment of the first scheduling layer, and the maximum spectral efficiency Gain, determining an optimal transmit power of the optimal candidate user equipment and user equipment of the first scheduling layer.
  • the second processing unit particularly for utility gain for each candidate user device and the user device the first scheduling layer 3 ⁇ 4 (r A (t) of the calculated, wherein, W is a user equipment a first layer scheduling
  • W is a user equipment a first layer scheduling
  • the transmit power of the VMIMO pairing at time t is ⁇ .
  • the corresponding transmit data rate, ⁇ ) is the transmit power of the candidate user equipment for VMIMO pairing at time t.
  • Corresponding transmission data rate which is performed by the user equipment of the first scheduling layer at time t
  • the transmit power of SIMO is P.
  • Corresponding transmission data rate where is the average transmission data rate of the user equipment of the first scheduling layer in the time period, (the average transmission data rate of the candidate user equipment in the At time period;
  • the third processing unit is specifically configured to be used according to each candidate user equipment and the first scheduling layer. a utility gain of the user equipment, determining a maximum utility gain of each candidate user equipment and a user equipment of the first scheduling layer, and determining an optimal candidate user equipment corresponding to the maximum utility gain, according to the optimal candidate user equipment and And a maximum transmit power of the user equipment of the first scheduling layer, and determining an optimal transmit power of the user equipment of the optimal candidate user equipment and the first scheduling layer.
  • an embodiment of the present invention further provides a base station device, including: a transmitter, a receiver, a memory, and a processor respectively connected to the transmitter, the receiver, and the memory, where the memory
  • the program is stored in a set of program code, and the processor is configured to invoke the program code stored in the memory to perform any one of the foregoing methods provided by the embodiments of the present invention.
  • an embodiment of the present invention further provides a base station device, including: a transmitter, a receiver, a memory, and a processor respectively connected to the transmitter, the receiver, and the memory, where the memory
  • the program is stored in a set of program code, and the processor is configured to invoke the program code stored in the memory to perform any one of the foregoing methods provided by the embodiments of the present invention.
  • the embodiment of the present invention provides a program product, including a computer readable medium, the computer readable medium, comprising a program code, for performing any one of the foregoing methods provided by the embodiment of the present invention. method.
  • the embodiment of the present invention further provides a program product, including a computer readable medium, the computer readable medium comprising a set of program code, configured to execute any one of the foregoing methods provided by the second aspect of the present invention. Item method.
  • the VMIMO interference control method and the base station device provided by the embodiment of the present invention firstly determine whether an edge user equipment exists in the local cell, and if there is an edge user equipment, the local cell sends an indication message to the neighboring cell to notify the neighboring cell.
  • the serving base station has an edge user equipment in the cell, so that the serving base station of the neighboring cell performs the VMIMO pairing of the user equipment in the neighboring cell after performing the VMIMO pairing on the user equipment in the neighboring cell after learning that the user equipment exists in the local cell. Controlling, so that the neighboring cell keeps the interference between the neighboring cell and the cell adjacent thereto (such as the local cell) unchanged according to the indication message, that is, the user equipment is used for VMIMO pairing in the neighboring cell.
  • Embodiment 1 is a flowchart of Embodiment 1 of an interference control method for VMIMO according to the present invention
  • Embodiment 2 is a flowchart of Embodiment 2 of an interference control method for VMIMO according to the present invention
  • Embodiment 3 is a flowchart of Embodiment 3 of an interference control method for VMIMO according to the present invention
  • Embodiment 1 of a base station device according to the present invention is a schematic structural diagram of Embodiment 1 of a base station device according to the present invention.
  • FIG. 5 is a schematic structural diagram of Embodiment 2 of a base station device according to the present invention.
  • Embodiment 3 of a base station device is a schematic structural diagram of Embodiment 3 of a base station device according to the present invention.
  • Embodiment 4 of a base station device according to the present invention is a schematic structural diagram of Embodiment 4 of a base station device according to the present invention.
  • FIG. 8 is a schematic structural diagram of Embodiment 7 of a base station device according to the present invention.
  • the technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention.
  • the embodiments are a part of the embodiments of the invention, and not all of the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.
  • Embodiment 1 is a flowchart of Embodiment 1 of an interference control method for VMIMO according to the present invention. As shown in FIG. 1, the method in this embodiment may include:
  • Step 101 The base station determines whether there is an edge user equipment in the local cell. If yes, step 102 is performed, otherwise, the process ends.
  • the edge user equipment Compared with the central user equipment, the edge user equipment is far away from the base station of the local cell, and the receiving base station sends less useful signals, so the performance of the edge user equipment is poor. If the user equipment in the neighboring cell performs VMIMO pairing, the neighboring The transmit power of the cell is increased. Therefore, the user equipment at the edge of the cell is subject to greater interference from the neighboring cell, so that the performance of the edge user is further degraded. To prevent further degradation of the performance of the edge user equipment in the cell, the base station needs to determine the cell. Yes If there is an edge user equipment, the base station performs the behavior in step 102. If the edge user equipment does not exist in the cell, the base station ends the interference control behavior.
  • the determining, by the base station, whether the edge user equipment exists in the current cell may be:
  • the base station acquires the SINR of the user equipment of the local cell, and if the SINR is less than or equal to the first preset threshold, determining that the user equipment is an edge user equipment, that is, the edge user equipment exists in the local cell; otherwise, determining that the user equipment is not an edge user equipment, if the base station is It is determined that all user equipments in the cell are not edge user equipments, and there is no edge user equipment in the current cell. This is because, if the SINR is low, the user equipment receives less useful signals and has poor performance, the user equipment is an edge user equipment. If the SINR is high, the user equipment receives many useful signals and performs well. User equipment is not an edge user equipment.
  • the base station of the cell may measure the SINR of the user equipment, or directly obtain the SINR of the user equipment measured in advance; and the size of the first preset threshold is determined by the situation of each cell, and the present invention does not limit the present invention. .
  • the determining, by the base station, whether the edge user equipment exists in the local area may be:
  • the base station receives the reference signal received power (Reference Signal Received Power, RSRP for short) and the RSRP of the neighboring cell reported by the user equipment; if the difference between the RSRP of the local cell and the RSRP of the neighboring cell is less than or equal to the first If the user equipment is an edge user equipment, the user equipment is an edge user equipment; otherwise, the user equipment is not an edge user equipment. If the base station determines that all user equipments are not edge user equipments, the current cell does not exist. Edge user device.
  • RSRP Reference Signal Received Power
  • the edge user equipment is far from the neighboring cell of the local cell, so the RSRP of the local cell received by the edge user equipment is small and the RSRP of the neighboring cell is large, thereby making the edge
  • the difference between the RSRP of the local cell received by the user equipment and the RSRP of the neighboring cell is small.
  • the size of the second preset threshold is determined by the situation of each cell, and the invention is not limited.
  • the determining, by the base station, whether the edge user equipment exists in the local area may be:
  • the base station collects the pairing probability or the pairing gain of the user equipment in the cell, and if the pairing probability or the pairing gain of the user equipment is less than the third preset threshold, determining that the user equipment is an edge user equipment, that is, the edge user equipment exists in the local cell; The user equipment is not an edge user equipment. If the base station determines that all user equipments are not edge user equipments, there is no edge user equipment in the local cell. This is because, if the performance of the user equipment is good, the probability that the user equipment participates in VMIMO pairing is higher, and accordingly, the user equipment participates in VMIMO pairing so that the system obtains the gain.
  • the statistically obtaining the pairing probability or the pairing gain of the user equipment may be periodically calculated, and the periodic time period is determined by the load condition of each cell; the preset threshold corresponding to the pairing probability or the preset threshold corresponding to the pairing gain is determined by The present invention is not limited by the circumstances of each cell.
  • the foregoing pairing probability is a resource block (Resource Block, referred to as RB) obtained by the user equipment in the second scheduling layer (has been paired with other users and paired with another user again) in the periodic time period.
  • the ratio is the sum of the number of RBs obtained by the user equipment at the first scheduling layer (first participating user pairing) and at the second scheduling layer.
  • the pairing gain is the sum of the gain obtained by the user equipment in the second scheduling layer in the periodic time period compared to the gain obtained by the user in the first scheduling layer and the second scheduling layer in the system.
  • Step 102 The base station sends an indication message to the neighboring cell of the local cell, where it is used to notify the serving cell of the neighboring cell that the edge user equipment exists in the cell, so that the serving base station of the neighboring cell is aware that the edge user equipment exists in the cell, When the user equipment in the neighboring cell performs VMIMO pairing, the transmit power of each paired user equipment is controlled.
  • the base station sends an indication message to the neighboring cell, and the indication message is used to notify the serving cell of the neighboring cell that the cell has an edge.
  • the user equipment so that the serving base station of the neighboring cell controls the transmit power of each paired user equipment when performing VMIMO pairing on the user equipment in the neighboring cell after learning that the user equipment exists in the neighboring cell, so as to maintain the neighboring cell as much as possible.
  • the interference to the local cell is the same as the interference to the local cell when the user equipment does not perform VMIMO pairing.
  • the difference between the interference to the local cell when the user equipment performs the VMIMO pairing in the neighboring cell and the interference to the local cell when the user equipment does not perform the VMIMO pairing are within the tolerance range, and in the following embodiments The meaning of keeping is the same.
  • the Interference over Thermal (abbreviated as ⁇ ) may be kept unchanged when the neighboring cell performs VMIMO pairing with the user equipment and the user equipment does not perform VMIMO pairing
  • the IoT is a parameter reflecting the inter-cell interference.
  • the neighboring cell keeps the interference between the neighboring cell and the cell adjacent thereto (such as the local cell) unchanged according to the indication message, that is, the neighboring cell keeps the user equipment for VMIMO.
  • the interference to the local cell when pairing is the same as the interference to the local cell when the user equipment is not VMIMO paired, or the interference is within the tolerance range. Accordingly, since the interference of the neighboring cell is unchanged or the tolerance is within the tolerance range, the present The edge user equipment in the cell is affected by the VMIMO pairing of the user equipment in the neighboring cell. The interference reduced and affected by neighboring cells will not increase substantially, and the performance of edge user equipment will not decrease further.
  • the edge user equipment exists in the current cell, and if there is an edge user equipment, sending an indication message to the neighboring cell, for notifying the serving base station of the neighboring cell.
  • An edge user equipment exists in the cell, so that the serving base station of the neighboring cell controls the transmit power of each paired user equipment when performing VMIMO pairing on the user equipment in the neighboring cell after learning that the user equipment exists in the neighboring cell.
  • the IoT is unchanged, so that the neighboring cell keeps the interference between the neighboring cell and the cell adjacent thereto (such as the local cell) unchanged according to the indication message, that is, the neighboring cell has the user equipment performing VMIMO.
  • the interference to the cell before and after the pairing is basically the same; thereby reducing the influence of the neighboring cell on the edge users in the cell when the user equipment performs VMIMO pairing.
  • Embodiment 2 is a flowchart of Embodiment 2 of the VMIMO interference control method according to the present invention.
  • the current cell in this embodiment refers to the neighboring cell in the embodiment shown in FIG. 1.
  • the neighboring cell in this embodiment refers to FIG.
  • the present cell of the embodiment is shown.
  • the method in this embodiment may include:
  • Step 201 The base station receives an indication message sent by the neighboring cell.
  • the neighboring cell sends an indication message to the local cell adjacent to the neighboring cell, so that the edge user equipment is not affected by the VMIMO pairing of the user equipment in the cell.
  • the indication message may indicate that the local cell performs power control, so as to keep the interference between the neighboring cell and the local cell as much as possible, for example, the IoT may be kept as constant as possible.
  • Step 202 The base station learns that the neighboring cell has an edge user equipment according to the indication message, so as to control the transmit power of each paired user equipment when performing VMIMO pairing on the user equipment of the local cell.
  • the base station of the cell receives the indication message sent by the neighboring cell, and according to the indication message, it is known that the neighboring cell has an edge user equipment, and further, the neighboring cell needs to know that the neighboring cell needs to maintain the interference with the neighboring cell as much as possible.
  • the information is that the user equipment in the cell performs VMIMO pairing in order to obtain the multi-user spatial multiplexing gain, improve the average throughput of the system, but increase the transmission power, and the increase of the transmission power results in the relationship between the cell and the neighboring cell.
  • the interference increases.
  • the base station of the cell needs to control the transmit power of each paired user equipment when the VMIMO pairing is performed on the user equipment, that is, the base station of the cell selects an appropriate one.
  • User equipment performs VMIMO pairing, and each paired user equipment is combined
  • the appropriate transmit power is used to transmit data, so as to keep the interference of the neighboring cell when the user equipment performs VMIMO pairing in the cell as much as the interference to the neighboring cell when the user equipment does not perform VMIMO pairing, correspondingly,
  • the interference of the cell is basically unchanged. Therefore, the edge user equipment in the neighboring cell is less affected by the VMIMO pairing of the user equipment in the cell, and the interference of the cell does not increase substantially, and the performance of the edge user equipment is basically not Further decline.
  • the edge user equipment exists in the neighboring cell, so as to control the transmission power of each paired user equipment when performing VMIMO pairing on the user equipment of the local cell.
  • the interference between the user equipment and the neighboring cell before and after VMIMO pairing in the cell is basically the same; the effect of the user equipment in the cell on the edge user equipment of the neighboring cell is reduced.
  • Embodiment 3 is a flowchart of Embodiment 3 of the VMIMO interference control method according to the present invention.
  • the current cell in this embodiment refers to the neighboring cell in the embodiment shown in FIG. 1.
  • the neighboring cell in this embodiment refers to FIG.
  • the present cell of the embodiment is shown.
  • the VMIMO interference control method in this embodiment introduces the technical solution of the present invention in more detail on the basis of the second embodiment of the method shown in FIG. 2.
  • the method in this embodiment may specifically include:
  • Step 301 The base station receives an indication message sent by the neighboring cell.
  • Step 302 The base station determines a transmit power combination when the user equipment of the first scheduling layer and each candidate user equipment of the second scheduling layer perform VMIMO pairing.
  • the base station determines the transmit power combination according to the principle of interference invariance to neighboring cells before and after VMIMO pairing.
  • the base station determines the transmission power combination, and does not absolutely use this principle, but tries to keep the interference to neighboring cells before and after VMIMO pairing as much as possible.
  • each candidate user equipment B in the second scheduling layer has a B1, B2... Bm and other different candidate user equipments should try to keep the interference between the local cell and the ''adjacent cell' unchanged, that is, the cell needs to maintain the user equipment A of the first scheduling layer as much as possible.
  • the interference to the neighboring cell is the same as the interference to the neighboring cell before the VMIMO pairing, and the user equipment in the cell does not perform VMIMO pairing before the VMIMO pairing, that is, the user in the cell.
  • device A is a SIMO
  • the user equipment A and the second scheduling of the first scheduling layer in the local cell are used to keep the interference as constant as possible.
  • the transmit power of each candidate user equipment B of the layer for VMIMO pairing should satisfy the formula (1)
  • PsiMO A ⁇ ( ⁇ , ⁇ ⁇ A (0 + ⁇ , ⁇ ⁇ (0 where, for the first user layer A of the first scheduling layer of the U, the two SIMOs are launched)
  • the user equipment A of the scheduling layer performs the transmit power of the VMIMO pairing
  • the PniIM0 ' B is the transmit power of the VMIMO pairing of the candidate user equipment B of the second scheduling layer
  • 3 ⁇ 4 is the user equipment of the first scheduling layer and the neighboring cell i
  • the path loss, ⁇ PL B (i) is the path loss of the candidate user equipment B to the neighboring cell, which is the power step.
  • the left side of the equation (1) is the interference of the local cell to the neighboring cell when the user equipment A of the first scheduling layer performs SIMO, and the right side of the equation (1) is the user equipment A of the first scheduling layer and each candidate.
  • User B performs VMIMO pairing interference to neighboring cells.
  • LTE Long Term Evolution
  • the transmit power is decreased or increased in steps, and the value is determined by the LTE protocol.
  • the invention is not limited. It should be noted that one of ordinary skill in the art can understand that the number of values is at least one.
  • the base station can calculate, according to the formula (1) and the formula (2), the transmit power when the user equipment A of the first scheduling layer and each candidate user equipment B perform VMIMO pairing, because the number of values is at least one, so the first
  • the combination of the transmission powers of the user equipment A of the scheduling layer and the candidate user equipments for VMIMO pairing is also at least one, that is, the combination of the transmission power when the user equipment A of the first scheduling layer and the candidate user equipment B1 perform VMIMO pairing is at least
  • the transmission power combination is also at least one, and so on, the user equipment A of the first scheduling layer, the candidate user equipment Bm, performs the VMIMO pairing transmission.
  • the power combination is also at least one.
  • Step 303 The base station determines, according to the determined transmit power combination of each user equipment, a pairing increment value generated when each candidate user equipment performs VMIMO pairing with the user equipment of the first scheduling layer.
  • the base station is calculated by the user equipment A of the first scheduling layer and each candidate user equipment B1.
  • B2 Bm respectively performs at least one transmit power combination in VMIMO pairing, and respectively calculates a pairing gain value, a pairing gain value generated when each candidate user equipment B corresponding to each transmit power combination performs VMIMO pairing with the user equipment A of the first scheduling layer. To be able to indicate the amount of gain of the performance of the cell system in performing VMIMO pairing.
  • the base station calculates the at least one transmit power combination when the user equipment A of the first scheduling layer and the candidate user equipment B1 perform VMIMO pairing according to the above calculation, and respectively calculates the candidate user equipment B1 and the first scheduling layer corresponding to each transmit power combination.
  • the base station performs, according to the calculation, the at least one transmit power combination of the user equipment A of the first scheduling layer and the candidate user equipment B2, and calculates the candidate user equipment B2 corresponding to each transmit power combination and the user equipment of the first scheduling layer.
  • the base station performs, according to the calculation, the at least one transmit power combination of the user equipment A of the first scheduling layer and the candidate user equipment Bm, and calculates the candidate user equipment Bm corresponding to each transmit power combination and the user equipment of the first scheduling layer.
  • Step 304 The base station determines an optimal candidate user equipment corresponding to the largest pairing increment value of each pairing increment value, and determines an optimal transmit power in a combination of the transmit power of the optimal candidate user equipment and the user equipment of the first scheduling layer.
  • the base station of the current cell When the base station of the current cell performs the VMIMO pairing between the candidate user equipment B1 and the user equipment A of the first scheduling layer in VMIMO pairing, and the candidate user equipment B2 and the user equipment A of the first scheduling layer perform VMIMO pairing. Comparing each generated pairing gain value, and so on, and each pairing gain value generated when the candidate user equipment Bm performs VMIMO pairing with the user equipment A of the first scheduling layer, the largest of all pairing gain values can be determined.
  • Generated when device A performs VMIMO pairing The combination of the transmit powers at the maximum pairing gain value, and the combination of the transmit powers is determined as the optimal transmit power combination, wherein the transmit power of the user equipment A of the first scheduling layer in the optimal transmit power combination is the first scheduling layer.
  • the optimal transmit power of the user equipment A, and the transmit power of the optimal candidate user equipment in the optimal transmit power combination is the optimal transmit power of the optimal candidate user equipment.
  • Step 305 The base station performs the optimal candidate user equipment with the user equipment of the first scheduling layer.
  • VMIMO pairing and notifying the optimal candidate user equipment and the user equipment of the first scheduling layer to transmit data at the optimal transmission power.
  • the base station of the local cell schedules the determined optimal candidate user equipment to perform VMIMO pairing with the user equipment of the first scheduling layer, and notifies the optimal candidate user equipment and the user equipment of the first scheduling layer to determine the respective optimal transmissions.
  • the power transmission data that is, the optimal candidate user equipment and the user equipment of the first scheduling layer may transmit data on the same RB with respective optimal transmission powers.
  • the base station receives the indication message sent by the neighboring cell, and determines, according to the indication message, the optimal candidate user equipment that performs VMIMO pairing with the user equipment of the first scheduling layer, and determines the optimal candidate user equipment and the first
  • the optimal transmit power in the transmit power combination of the user equipment of the scheduling layer is then scheduled, and the optimal candidate user equipment is scheduled to perform VMIMO pairing with the user equipment of the first scheduling layer, and the data is transmitted at the respective optimal transmit power.
  • the implementation of the user equipment in the cell is as much as possible to interfere with the neighboring cell before and after VMIMO pairing; thereby reducing the impact on the user equipment of the neighboring cell when the user equipment performs VMIMO pairing in the cell, and also causing the user equipment to perform The gain of the performance of the cell system in the VMIMO pairing is increased.
  • SE SE ⁇ O, A + SE VMM0 , S - SE 0
  • the spectral efficiency gain where, .
  • the transmit power of the VMIMO pairing for the user equipment of the first scheduling layer is ⁇ « ⁇ .
  • Corresponding spectral efficiency is the corresponding spectral efficiency for the candidate user equipment to perform VMIMO pairing transmission power.
  • the transmit power of SIMO is ⁇ for the user equipment of the first scheduling layer. Corresponding spectral efficiency.
  • the foregoing step 304 may be specifically: the base station determines a maximum spectral efficiency gain of each candidate user equipment and a user equipment of the first scheduling layer according to a spectrum efficiency gain of each candidate user equipment and a user equipment of the first scheduling layer, and determines a maximum spectrum efficiency.
  • the optimal candidate user equipment corresponding to the gain; determining the optimality of the optimal candidate user equipment and the user equipment of the first scheduling layer according to the combination of the transmit power of the optimal candidate user equipment and the user equipment of the first scheduling layer and the maximum spectral efficiency gain Transmit power.
  • the user equipment ⁇ and each candidate user equipment of the first scheduling layer respectively calculated
  • Bl, B2 Bm respectively perform at least one transmit power combination in VMIMO pairing, and calculate each candidate user equipment corresponding to each transmit power combination by formula (3) ASE ⁇ SE vMMo, A + SE VMM0 ⁇ B - SE SIM0 A > 0
  • the spectral efficiency gain value generated when B performs VMIMO pairing with the user equipment A of the first scheduling layer, and the spectral efficiency gain value should be a value greater than zero.
  • the spectral efficiency gain value may represent the throughput gain of the own cell system.
  • the process of obtaining the spectrum efficiency is as follows:
  • the SINR is obtained by calculating the transmit power of the user equipment, and the mapping table of the SINR and the spectrum efficiency is obtained according to the calculated value of the SINR, and the spectrum corresponding to the transmit power can be obtained. effectiveness.
  • the base station calculates the at least one transmit power combination when the user equipment A of the first scheduling layer and the candidate user equipment B1 perform VMIMO pairing according to the above calculation, and respectively calculates the candidate user equipment B1 and the first scheduling layer corresponding to each transmit power combination.
  • the user equipment A performs a VMIMO pairing to generate a spectral efficiency gain value greater than zero.
  • the base station performs, according to the calculation, the at least one transmit power combination of the user equipment A of the first scheduling layer and the candidate user equipment B2, and calculates the candidate user equipment B1 corresponding to each transmit power combination and the user equipment of the first scheduling layer.
  • a spectral efficiency gain value greater than zero produced when VMIMO pairing is performed.
  • the base station performs, according to the calculation, the at least one transmit power combination of the user equipment A of the first scheduling layer and the candidate user equipment Bm, and calculates the candidate user equipment Bm corresponding to each transmit power combination and the user equipment of the first scheduling layer.
  • the base station compares each candidate user equipment B with a spectral efficiency gain value greater than zero generated when the user equipment A of the first scheduling layer performs VMIMO pairing, and can determine a maximum spectral efficiency gain value; and then the maximum spectral efficiency gain value Determining a candidate user equipment that generates the maximum spectral efficiency gain value when performing VMIMO pairing with the first scheduling layer user A, and determining the candidate user equipment as an optimal candidate user equipment; and finally, according to the maximum spectral efficiency gain value and When the optimal candidate user equipment performs VMIMO pairing with the user equipment A of the first scheduling layer, it can be determined that the optimal candidate user equipment and the user equipment A of the first scheduling layer perform VMIMO pairing to generate the maximum.
  • the frequency efficiency gain value of the transmit power combination, and the The combination of the transmit power is determined as the optimal transmit power combination, wherein the transmit power of the user equipment A of the first scheduling layer in the optimal transmit power combination is the optimal transmit power of the user equipment A of the first scheduling layer, and the optimal transmit power combination
  • the transmit power of the optimal candidate user equipment is the optimal transmit power of the optimal candidate user equipment.
  • the base station receives the indication message sent by the neighboring cell when the edge user equipment exists, and determines the optimal candidate user that performs VMIMO pairing with the user equipment of the first scheduling layer according to the indication message and the spectrum efficiency gain value maximization. And determining, by the device, the optimal transmit power in the combination of the transmit power of the optimal candidate user equipment and the user equipment of the first scheduling layer, and then scheduling the optimal candidate user equipment to perform VMIMO pairing with the user equipment of the first scheduling layer, and The optimal transmit power is used to transmit data.
  • the implementation of the user equipment in the cell is as much as possible to interfere with the neighboring cell before and after the VMIMO pairing; thereby reducing the impact on the user equipment of the neighboring cell when the user equipment performs VMIMO pairing in the cell, and also causing the user equipment to perform The throughput of the cell system increases when VMIMO pairing.
  • the foregoing step 303 may be specifically: the base station calculates a utility gain of each candidate user equipment and a user equipment of the first scheduling layer according to r ⁇ ;
  • the user equipment of the first scheduling layer performs the transmission data rate corresponding to the transmission power of the VMIMO pairing at time t
  • W is the transmission data corresponding to the transmission power of the VMIMO pairing by the candidate user equipment at time t.
  • the rate, W is the user equipment of the first scheduling layer
  • the transmission power of the SIMO is the corresponding transmission data rate at time t
  • W is the average transmission data rate of the user equipment of the first scheduling layer in the time period, 7 ⁇
  • the average sending data rate of the user equipment in the time slot is as follows:
  • the foregoing step 304 may be specifically: the base station determines, according to the utility gain of each candidate user equipment and the user equipment of the first scheduling layer, each candidate user equipment and the user equipment of the first scheduling layer.
  • the maximum utility gain, and determining the optimal candidate user equipment corresponding to the maximum utility gain; determining the optimal candidate user equipment and the first according to the transmit power combination and the maximum utility gain of the optimal candidate user equipment and the user equipment of the first scheduling layer The optimal transmit power of the user equipment of the scheduling layer.
  • the base station is calculated by the user equipment of the first scheduling layer and each candidate user equipment
  • Bl, B2 Bm respectively perform at least one transmit power combination in VMIMO pairing, and calculate, by formula (4), each candidate user equipment B and the first scheduling layer corresponding to each transmit power combination
  • the utility gain value generated by the user device A when performing VMIMO pairing, and the utility gain value should be a value greater than zero.
  • the utility gain value can indicate the proportional fairness of the system in the home cell.
  • the process of obtaining the transmission data rate at time t is as follows: the SINR is obtained by calculating the transmission power of the user equipment at time t, and then the mapping table of SINR and spectrum efficiency is obtained according to the calculated value of the SINR. The spectral efficiency is multiplied by the number of RBs obtained by the user equipment, that is, the transmission data rate corresponding to the transmission power.
  • the base station calculates the at least one transmit power combination when the user equipment A of the first scheduling layer and the candidate user equipment B1 perform VMIMO pairing according to the above calculation, and respectively calculates the candidate user equipment B1 and the first scheduling layer corresponding to each transmit power combination.
  • User device A performs a VMIMO pairing with a utility gain value greater than zero.
  • the base station performs, according to the calculation, the at least one transmit power combination of the user equipment A of the first scheduling layer and the candidate user equipment B2, and calculates the candidate user equipment B1 corresponding to each transmit power combination and the user equipment of the first scheduling layer.
  • the base station performs, according to the calculation, the at least one transmit power combination of the user equipment A of the first scheduling layer and the candidate user equipment Bm, and calculates the candidate user equipment Bm corresponding to each transmit power combination and the user equipment of the first scheduling layer.
  • the base station compares the candidate user equipment B with the utility gain value greater than zero generated when the user equipment A of the first scheduling layer performs VMIMO pairing, and can determine the maximum utility gain value; and then the maximum utility gain value can be determined and
  • the first scheduling layer user A performs the VMIMO pairing to generate the candidate user equipment of the maximum utility gain value, and determines the candidate user equipment as the optimal candidate user equipment; finally, according to the maximum utility gain value and the optimal candidate user
  • the combination of each transmit power may determine that the optimal candidate user equipment generates the maximum utility gain value when performing VMIMO pairing with the user equipment A of the first scheduling layer.
  • Combination of transmit power, and determining the transmit power combination as an optimal transmit power combination wherein the transmit power of the user equipment A of the first scheduling layer in the optimal transmit power combination is the optimal transmit of the user equipment A of the first scheduling layer Power, optimal candidate user equipment in optimal transmit power combination
  • the transmit power is the optimal transmit power of the optimal candidate user equipment.
  • the neighboring cell by receiving an indication message sent by the neighboring cell, and determining, according to the indication message and the utility gain value, determining an optimal candidate user equipment that performs VMIMO pairing with the user equipment of the first scheduling layer, and determining an optimal candidate.
  • the optimal transmit power in the combination of the transmit power of the user equipment and the user equipment of the first scheduling layer, and then scheduling the optimal candidate user equipment to perform VMIMO pairing with the user equipment of the first scheduling layer, and transmitting data at respective optimal transmit powers.
  • the implementation of the user equipment in the cell is as much as possible to interfere with the neighboring cell before and after VMIMO pairing; thereby reducing the impact on the user equipment of the neighboring cell when the user equipment performs VMIMO pairing in the cell, and also causing the user equipment to perform
  • the proportional fairness of the present cell system increases when VMIMO pairing.
  • the base station device in this embodiment may include: a determining module 11 and a message sending module 12, where the determining module 11 is configured to determine whether the cell exists.
  • the edge user equipment, the message sending module 12 is configured to send an indication message to the neighboring cell of the cell if the edge user exists in the cell, and is used to notify the serving cell of the neighboring cell that the edge user equipment exists in the cell, so that the service of the neighboring cell
  • the base station controls the transmit power of each paired user equipment when VMIMO pairing is performed on the user equipment in the neighboring cell.
  • the determining module 11 may be specifically configured to obtain an SINR of the user equipment in the local cell, and if the SINR is less than or equal to the first preset threshold, determine that the user equipment is an edge user equipment.
  • the determining module 11 may be specifically configured to receive the RSRP of the local cell reported by the user equipment and the RSRP of the neighboring cell, and determine if the difference between the RSRP of the local cell and the RSRP of the neighboring cell is less than or equal to a preset threshold.
  • the user equipment is an edge user equipment.
  • the determining module 11 may be specifically configured to obtain the pairing probability or the pairing gain of the user equipment in the cell. If the pairing probability or the pairing gain of the user equipment is less than the third preset threshold, determine that the user equipment is an edge user equipment.
  • the base station device of this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 1 , and the implementation principle and technical effects are similar, and details are not described herein again.
  • the above message sending module 12 may be a transmitter or a transceiver, and is implemented as a transceiver corresponding to hardware.
  • the above determining module 11 may be embedded in the hardware of the base station in hardware or may be stored in the memory of the base station in software, so that the processor invokes the operations corresponding to the above modules.
  • the processor can be a central processing unit (Central Processing Unit, referred to as CPU), microprocessor, microcontroller, etc.
  • FIG. 5 is a schematic structural diagram of Embodiment 2 of a base station device according to the present invention. As shown in FIG. 5, the base station includes a transmitter 21, a receiver 22, a memory 23, and a processor 24 coupled to the transmitter 21, the receiver 22, and the memory 23, respectively.
  • the base station may also include a common component (not shown in the embodiment), such as an antenna, a baseband processing component, a medium-frequency processing component, and an input/output device.
  • the embodiment of the present invention is not limited herein.
  • a set of program codes is stored in the memory, and the processor 24 is configured to call the program code stored in the memory 23 for performing the following operations:
  • the transmitter 21 Determining whether there is an edge user equipment in the cell; if there is an edge user in the cell, the transmitter 21 sends an indication message to the neighboring cell of the cell by the transmitter 21, and is used to notify the neighboring cell that the serving base station has an edge user equipment in the cell, so as to be adjacent.
  • the serving base station of the cell controls the transmit power of each paired user equipment when performing VMIMO pairing on the user equipment in the neighboring cell after learning that the user equipment exists in the cell.
  • determining whether the user equipment exists in the cell includes: obtaining a signal to interference plus noise ratio SINR of the user equipment in the cell, and determining that the user equipment is an edge user equipment if the SINR is less than or equal to the first preset threshold; or And receiving the reference signal received power RSRP of the local cell reported by the user equipment and the RSRP of the neighboring cell, and determining the user equipment if the difference between the RSRP of the local cell and the RSRP of the neighboring cell is less than or equal to the second preset threshold. If the user equipment's pairing probability or pairing gain is less than the third preset threshold, the user equipment is determined to be an edge user equipment.
  • the base station device of this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 1 , and the implementation principle and technical effects are similar, and details are not described herein again.
  • FIG. 6 is a schematic structural diagram of Embodiment 3 of a base station device according to the present invention.
  • the base station device in this embodiment may include: a message receiving module 31 and a processing module 32, where the message receiving module 31 is configured to receive a neighboring cell.
  • the sending instruction message is used by the processing module 32 to learn, according to the indication message, that the neighboring cell has an edge user equipment, so as to control the transmit power of each paired user equipment when performing VMIMO pairing on the user equipment of the local cell.
  • the base station device of this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 2, and the implementation principle and the technical effect are similar, and details are not described herein again.
  • FIG. 7 is a schematic structural diagram of Embodiment 4 of a base station device according to the present invention. As shown in FIG. 7, this embodiment is shown in FIG. The base station device is based on the base station device shown in FIG. 6. Further, the processing module 32 may include: a first processing unit 321, a second processing unit 322, a third processing unit 323, and a fourth processing unit 324, where a processing unit 321 is configured to determine a transmit power combination when the user equipment of the first scheduling layer and each candidate user equipment of the second scheduling layer perform VMIMO pairing; and the second processing unit 322 is configured to perform, according to the determined transmission of each user equipment The power combination is used to determine a pairing increment value generated when each candidate user equipment performs VMIMO pairing with the user equipment of the first scheduling layer.
  • a processing unit 321 is configured to determine a transmit power combination when the user equipment of the first scheduling layer and each candidate user equipment of the second scheduling layer perform VMIMO pairing
  • the second processing unit 322 is configured to perform, according to the determined transmission of each user
  • the third processing unit 323 is configured to determine a maximum pairing increment value corresponding to each pairing increment value.
  • the user equipment of the layer performs VMIMO pairing, and notifies the optimal candidate user equipment and the user equipment of the first scheduling layer to transmit data with optimal transmit power.
  • the first processing unit 321 can be used for the basis of p
  • A calculates the transmit power when the user equipment in the first scheduling layer and each candidate user equipment perform VMIMO pairing; wherein, ⁇ ⁇ . SIMO transmission power for the scheduled user equipment a first layer, ⁇ 0 ' ⁇ scheduling for a user equipment a first layer pair VMIMO transmit power, P m. , s is the transmit power of the VMIMO pairing for the candidate user equipment, 3 ⁇ 4 (0 is the path loss of the user equipment of the first scheduling layer to the neighboring cell, 3 ⁇ 4 (0 is the candidate user equipment to the adjacent cell'' path loss,
  • the base station device in this embodiment may be used to implement the technical solution of the method embodiment shown in FIG. 3, and the implementation principle and the technical effect are similar, and details are not described herein again.
  • the transmit power of the SIMO is performed for the user equipment of the first scheduling layer to be a corresponding spectral efficiency.
  • the third processing unit 323 may be specifically configured to determine a maximum spectral efficiency of each candidate user equipment and user equipment of the first scheduling layer according to a spectrum efficiency gain of each candidate user equipment and a user equipment of the first scheduling layer. Gain, and determining an optimal candidate user equipment corresponding to the maximum spectral efficiency gain, according to the optimal candidate user equipment and the transmit power group of the user equipment of the first scheduling layer Combining the maximum spectral efficiency gain, determining the optimal transmit power of the optimal candidate user equipment and the user equipment of the first scheduling layer.
  • the base station device in this embodiment may be used to perform the technical solution of the method embodiment shown in Embodiment 4 of the VMIMO interference control method of the present invention, and the implementation principle and the technical effect are similar.
  • the second processing unit 322 may be specifically configured to calculate a utility gain of each candidate user equipment and user equipment of the first scheduling layer according to (0 ⁇ B (t) A ⁇ ). ;
  • the transmit power of the VMIMO pairing of the user equipment of the first scheduling layer at time t is the transmission data rate corresponding to PvMIM0 ′ A
  • w is the transmission power of the candidate user equipment for VMIMO pairing at time t.
  • the data rate, W is the user equipment of the first scheduling layer
  • the transmission power of SIMO is P ⁇ at time t.
  • Corresponding transmission data rate, W is the average transmission data rate of the user equipment of the first scheduling layer in the time period
  • W is the average transmission data rate of the candidate user equipment in the time period.
  • the third processing unit 323 may be specifically configured to determine, according to the utility gain of each candidate user equipment and the user equipment of the first scheduling layer, a maximum utility gain of each candidate user equipment and the user equipment of the first scheduling layer. And determining an optimal candidate user equipment corresponding to the maximum utility gain, determining the optimal candidate user equipment and the user of the first scheduling layer according to the transmit power combination and the maximum utility gain of the optimal candidate user equipment and the user equipment of the first scheduling layer The optimal transmit power of the device.
  • the base station device of this embodiment may be used to perform the technical solution of the method embodiment shown in the fifth embodiment of the VMIMO interference control method of the present invention.
  • the implementation principle and technical effects are similar, and are not described herein again.
  • the above message receiving module 31 may be a receiver or a transceiver, and is implemented as a transceiver corresponding to hardware.
  • the above processing module 32 may be embedded in the hardware of the base station in hardware or may be stored in the memory of the base station in software, so that the processor invokes the operations corresponding to the above modules.
  • the processor can be a CPU, a microprocessor, a microcontroller, or the like.
  • the base station includes a transmitter 41, a receiver 42, a memory 43, and a processor connected to the transmitter 41, the receiver 42, and the memory 43, respectively. 44.
  • the base station may further include an antenna, a baseband processing component, and The radio frequency processing component, the input and output device, and the like are not shown in the embodiment of the present invention.
  • the memory 43 stores a set of program codes
  • the processor 44 is configured to call the program code stored in the memory 43 to: receive the indication message sent by the neighboring cell by the receiver 42; and according to the indication message, It is known that the edge user equipment exists in the neighboring cell to control the transmit power of each paired user equipment when VMIMO pairing is performed on the user equipment of the local cell.
  • the transmit power of each paired user equipment is controlled, including:
  • the optimal candidate user equipment is VMIMO paired with the user equipment of the first scheduling layer, and the optimal candidate user equipment and the user equipment of the first scheduling layer are notified to transmit data with optimal transmit power.
  • the transmit power of the SIMO is the transmit power of the VMIMO pairing for the user equipment of the first scheduling layer
  • the transmit power of the VMIMO pairing for the candidate user equipment is the user equipment of the first scheduling layer to the neighboring cell.
  • the path loss, ⁇ 3 ⁇ 4 (0 is the path loss of the candidate user equipment to the neighboring cell '', and y is the power down step. Further, according to the determined combination of the transmit power of each user equipment, each candidate user equipment is determined
  • the transmit power of the VMIMO pairing is the frequency efficiency of the corpse 0 ' ⁇
  • the tjsIM0 ' A is the spectrum efficiency of the SIMO transmit power of the user equipment of the first scheduling layer is PsiM0 ' A ;
  • Determining an optimal candidate user equipment corresponding to a maximum pairing increment value of each pairing increment value and determining an optimal transmit power in a combination of the transmit power of the optimal candidate user equipment and the user equipment of the first scheduling layer including: a spectrum efficiency gain of the candidate user equipment and the user equipment of the first scheduling layer, determining a maximum spectral efficiency gain of each candidate user equipment and a user equipment of the first scheduling layer, and determining an optimal candidate user equipment corresponding to the maximum spectral efficiency gain;
  • determining, according to the determined transmit power combination of each user equipment, a pairing increment value generated when each candidate user equipment performs VMIMO pairing with the user equipment of the first scheduling layer including: according to Or B B (t) r A ( t) calculating a utility gain of each candidate user equipment and user equipment of the first scheduling layer;
  • W is a user equipment a first layer is VMIMO pairing scheduling transmission power P VMMO at time t, A corresponding to the transmission data rate, W is a candidate user device at the time t
  • VMIMO pair ⁇ corresponding transmit power transmitting data rate
  • W is the transmit power of the user equipment a first layer is scheduled at time t is SIMO ⁇ ⁇ .
  • Corresponding transmission data rate, ⁇ ⁇ ( ⁇ ) is the average transmission data rate of the user equipment of the first scheduling layer in the time period, (0 is the average transmission data rate of the candidate user equipment in the time period;
  • Determining the optimal candidate user equipment corresponding to the largest pairing increment value of each pairing increment value and determining the optimal transmission power in the combination of the transmit power of the optimal candidate user equipment and the user equipment of the first scheduling layer including:
  • the base station device of this embodiment may be used to perform the technical solution shown in any one of the method embodiments of Embodiment 2 to Embodiment 5 of the VMIMO interference control method of the present invention, and the implementation principle and technical effects thereof Similar, it will not be described here.
  • the method includes the steps of the foregoing method embodiments; and the foregoing storage medium includes: a medium that can store program codes, such as a ROM, a RAM, a magnetic disk, or an optical disk.

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Abstract

本发明实施例提供一种VMIMO的干扰控制方法及基站设备,一种VMIMO的干扰控制方法,包括:确定本小区是否存在边缘用户设备;若存在,则向本小区的相邻小区发送指示消息,以便所述相邻小区的服务基站进行功率控制。本发明实施例通过确定本小区是否存在边缘用户设备,若存在边缘用户设备,则本小区向相邻小区发送指示消息,从而使得相邻小区根据该指示消息,尽量保持其和与它相邻的小区(如本小区)之间的干扰不变,即实现了尽量保持相邻小区有用户设备进行VMIMO配对前后对本小区的干扰一样;从而减少了相邻小区中有用户设备进行VMIMO配对时对本小区边缘用户的影响。

Description

VMIMO的干扰控制方法及基站设备
技术领域 本发明实施例涉及通信技术, 尤其涉及一种虚拟多输入多输出 (Virtual
Multiple-input Multiple-output, 简称为 VMIMO )的干扰控制方法及基站设备。
背景技术
在通信领域, 多输入多输出 ( Multiple-input Multiple-output , 简称为 ΜΙΜΟ )技术因其能够极大提高系统容量和频谱效率而获得了发展。 然而, 考虑到对用户设备(或移动终端)轻薄短小的要求, 在用户设备上安装多个 天线变得困难, 从而阻碍了 ΜΙΜΟ技术的优势在上行链路中的发挥。
VMIMO技术很好的解决了上行 MIMO的问题。 VMIMO允许两个或两 个以上的用户设备进行虚拟绑定(以下称之为配对, 故以下配对并非只涉及 两个用户设备, 还可能涉及三个或更多用户设备) , 使用相同的时频资源来 传输数据。 由于 VMIMO在同样的时频资源上调度了多个用户设备, 与单输 入多输出 (Single input Multiple output, 简称为 SIMO )相比, 用户设备在 VMIMO 下受到邻区干扰及配对用户设备的干扰, 导致信号与干扰加噪声比 ( Signal to Interference plus Noise Ratio , 简称为 SINR ) 降低很明显, 用户设 备吞吐量可能出现负增益, 进而用户设备性能下降。 发明内容
本发明实施例提供一种 VMIMO的干扰控制方法及基站设备, 用以解决 用户设备吞吐量出现负增益且性能下降的技术问题。
第一方面, 本发明实施例提供一种 VMIMO的干扰控制方法, 包括: 确定本小区是否存在边缘用户设备;
若存在, 向所述相邻小区发送指示消息, 用于通知所述相邻小区的服务 基站所述本小区存在边缘用户设备, 以便所述相邻小区的服务基站在获知所 述本小区存在边缘用户设备后,在对所述相邻小区内的用户设备进行 VMIMO 配对时对各配对用户设备的发射功率进行控制。
在第一方面的第一种可能的实现方式中, 所述确定本小区是否存在边缘 用户设备, 包括:
获取所述本小区中用户设备的信号与干扰加噪声比 SINR;
若所述 SINR小于或等于第一预设阈值, 则确定所述用户设备为边缘用 户设备。
在第一方面的第二种可能的实现方式中, 所述确定本小区是否存在边缘 用户设备, 包括:
接收用户设备上报的所述本小区的参考信号接收功率 RSRP和所述相邻 小区的 RSRP;
若所述本小区的 RSRP与相邻小区的 RSRP之间的差值小于或等于第二 预设阈值, 则确定所述用户设备为边缘用户设备。
在第一方面的第三种可能的实现方式中, 所述确定本小区是否存在边缘 用户设备, 包括:
统计获取所述本小区内用户设备的配对概率或配对增益;
若用户设备的配对概率或配对增益小于第三预设阈值, 则确定所述用户 设备为边缘用户设备。
第二方面, 本发明实施例还提供一种 VMIMO的干扰控制方法, 包括: 接收相邻小区发送的指示消息;
根据所述指示消息, 获知所述相邻小区存在边缘用户设备, 以在对本小 区用户设备进行 VMIMO配对时, 对各配对用户设备的发射功率进行控制。
在第二方面的第一种可能的实现方式中, 所述在对本小区用户设备进行 VMIMO配对时对各配对用户设备的发射功率进行控制, 包括:
确定第一调度层的用户设备和第二调度层的各候选用户设备进行 VMIMO配对时的发射功率组合;
根据确定的各用户设备的发射功率组合, 确定所述各候选用户设备与所 述第一调度层的用户设备进行 VMIMO配对时所产生的配对增量值;
确定各配对增量值中最大的配对增量值对应的最优候选用户设备并确定 所述最优候选用户设备与所述第一调度层的用户设备的发射功率组合中的最 优发射功率; 将所述最优候选用户设备与所述第一调度层的用户设备进行 VMIMO配 对, 并通知所述最优候选用户设备和所述第一调度层的用户设备以所述最优 发射功率发送数据。
结合第二方面的第一种可能的实现方式, 在第二方面的第二种可能的实 现方式中, 所述确定第一调度层的用户设备和第二调度层的各候选用户设备 进行 VMIMO配对时的发射功率组合, 包括:
根据 P ,A∑PLA (j、 = PVMM0,A∑ PLA (i) + PVMM0,B∑ PLB ( 和 lO lg^ = ydB计 算处于第一调度层的用户设备和各候选用户设备进行 VMIMO配对时的发射 功率;
其中, ^。^为所述第一调度层的用户设备进行 SIMO的发射功率, P 为所述第一调度层的用户设备进行 VMIMO配对的发射功率, P M。,£为候选 用户设备进行 VMIMO配对的发射功率, ¾(0为所述第一调度层的用户设 备到相邻小区 的路损, ¾(0为候选用户设备到相邻小区 的路损, y为功 率下降步长。
结合第二方面的第一种可能的实现方式或第二方面的第二种可能的实现 方式, 在第二方面的第三种可能的实现方式中, 所述根据确定的各用户设备 的发射功率组合, 确定所述各候选用户设备与所述第一调度层的用户设备进 行 VMIMO配对时所产生的配对增量值, 包括:
^ ^SE = SEVMMO i + SE > 0计算所述各候选用户设备与所述 第一调度层的用户设备的频谱效率增益, 其中, ffi MM。, 为所述第一调度层的 用户设备进行 VMIMO配对的发射功率为 ^^^对应的频谱效率, SE 为 候选用户设备进行 VMIMO配对的发射功率为 P 对应的频谱效率, SE 为所述第一调度层的用户设备进行 SIMO 的发射功率为 P™。 对应的频谱效 率;
所述确定各配对增量值中最大的配对增量值对应的最优候选用户设备并 确定所述最优候选用户设备与所述第一调度层的用户设备的发射功率组合中 的最优发射功率, 包括:
根据各候选用户设备与所述第一调度层的用户设备的频谱效率增益, 确 定各候选用户设备与所述第一调度层的用户设备的最大频谱效率增益, 并确 定所述最大频谱效率增益对应的最优候选用户设备; 根据所述最优候选用户设备与所述第一调度层的用户设备的发射功率组 合和所述最大频谱效率增益, 确定所述最优候选用户设备与所述第一调度层 的用户设备的最优发射功率。
结合第二方面的第一种可能的实现方式或第二方面的第二种可能的实现 方式, 在第二方面的第四种可能的实现方式中, 所述根据确定的各用户设备 的发射功率组合, 确定所述各候选用户设备与所述第一调度层的用户设备进 行
Figure imgf000006_0001
度层的用户设备的效用增益, 其中, 为所述第一调度层的用户设备在 t 时刻进行 VMIMO配对的发射功率为 。 对应的发送数据速率, 为候 选用户设备在 t时刻进行 VMIMO配对的发射功率为 PvMM0'B对应的发送数据速 率, rA ( 为所述第一调度层的用户设备在 t时刻进行 SIMO的发射功率为 PsiM0'A 对应的发送数据速率, W为所述第一调度层的用户设备在 时间段内的平 均发送数据速率, 为候选用户设备在 时间段内的平均发送数据速率; 所述确定各配对增量值中最大的配对增量值对应的最优候选用户设备并 确定所述最优候选用户设备与所述第一调度层的用户设备的发射功率组合中 的最优发射功率, 包括:
根据各候选用户设备与所述第一调度层的用户设备的效用增益, 确定各 候选用户设备与所述第一调度层的用户设备的最大效用增益, 并确定所述最 大效用增益对应的最优候选用户设备;
根据所述最优候选用户设备与所述第一调度层的用户设备的发射功率组 合和所述最大效用增益, 确定所述最优候选用户设备与所述第一调度层的用 户设备的最优发射功率。
第三方面, 本发明实施例提供一种基站设备, 包括:
确定模块, 用于确定本小区是否存在边缘用户设备;
消息发送模块, 用于若本小区存在边缘用户, 向所述本小区的相邻小区 发送指示消息, 用于通知所述相邻小区的服务基站所述本小区存在边缘用户 设备,以便所述相邻小区的服务基站在获知所述本小区存在边缘用户设备后, 在对所述相邻小区内的用户设备进行 VMIMO配对时对各配对用户设备的发 射功率进行控制。 在第三方面的第一种可能的实现方式中, 所述确定模块, 具体用于获取 所述本小区中用户设备的信号与干扰加噪声比 SINR, 若所述 SINR小于或等 于第一预设阈值, 则确定所述用户设备为边缘用户设备。
在第三方面的第二种可能的实现方式中, 所述确定模块, 具体用于接收 用户设备上报的所述本小区的参考信号接收功率 RSRP 和所述相邻小区的 RSRP, 若所述本小区的 RSRP与相邻小区的 RSRP之间的差值小于或等于第 二预设阈值, 则确定所述用户设备为边缘用户设备。
在第三方面的第三种可能的实现方式中, 所述确定模块, 具体用于统计 获取所述本小区内用户设备的配对概率或配对增益, 若用户设备的配对概率 或配对增益小于第三预设阈值, 则确定所述用户设备为边缘用户设备。
第四方面, 本发明实施例还提供一种基站设备, 包括:
消息接收模块, 用于接收相邻小区发送的指示消息;
处理模块, 用于根据所述指示消息, 获知所述相邻小区存在边缘用户设 备, 以在对本小区用户设备进行 VMIMO配对时, 对各配对用户设备的发射 功率进行控制。
在第四方面的第一种可能的实现方式中, 所述处理模块包括:
第一处理单元, 用于确定第一调度层的用户设备和第二调度层的各候选 用户设备进行 VMIMO配对时的发射功率组合;
第二处理单元, 用于根据确定的各用户设备的发射功率组合, 确定所述 各候选用户设备与所述第一调度层的用户设备进行 VMIMO配对时所产生的 配对增量值;
第三处理单元, 用于确定各配对增量值中最大的配对增量值对应的最优 候选用户设备并确定所述最优候选用户设备与所述第一调度层的用户设备的 发射功率组合中的最优发射功率;
第四处理单元, 用于将所述最优候选用户设备与所述第一调度层的用户 设备进行 VMIMO配对, 并通知所述最优候选用户设备和所述第一调度层的 用户设备以所述最优发射功率发送数据。
结合第四方面的第一种可能的实现方式, 在第四方面的第二种可能的实 现方式中, 所述第一处理单元, 具体用于根据
P , A∑PLA (f) = Pvmu0A X PLA (0 + Pvm X PLB ( 和 lOlg^ = ydB计算处于第 i i i VMIMO, A 一调度层的用户设备和各候选用户设备进行 VMIMO配对时的发射功率; 其中, ^。^为所述第一调度层的用户设备进行 SIMO的发射功率, P 为所述第一调度层的用户设备进行 VMIMO配对的发射功率, Pw。, 为候选
T PLA (i)
用户设备进行 VMIMO配对的发射功率, i 为所述第一调度层的用户设 y pLB (i)
备到相邻小区' '的路损, '· 为候选用户设备到相邻小区' '的路损, y为功 率下降步长。
结合第四方面的第一种可能的实现方式或第四方面的第二种可能的实现 方式, 在第四方面的第三种可能的实现方式中, 所述第二处理单元, 具体用
- £ = SEy^o,A + SE¥MMOJB -5¾/ 。 > o计算所述各候选用户设备与所述第 一调度层的用户设备的频谱效率增益, 其中, ffira^。 为所述第一调度层的用 户设备进行 VMIMO配对的发射功率为 ^ ^对应的频谱效率 为候 选用户设备进行 VMIMO配对的发射功率为 对应的频谱效率 为 所述第一调度层的用户设备进行 SIMO的发射功率为 P 。 对应的频谱效率; 所述第三处理单元, 具体用于根据各候选用户设备与所述第一调度层的 用户设备的频谱效率增益, 确定各候选用户设备与所述第一调度层的用户设 备的最大频谱效率增益, 并确定所述最大频谱效率增益对应的最优候选用户 设备, 根据所述最优候选用户设备与所述第一调度层的用户设备的发射功率 组合和所述最大频谱效率增益, 确定所述最优候选用户设备与所述第一调度 层的用户设备的最优发射功率。
结合第四方面的第一种可能的实现方式或第四方面的第二种可能的实现 方式, 在第四方面的第四种可能的实现方式中,
= + - > 0
所述第二处理单元, 具体用于根据 ¾( rA(t) 计算所述各 候选用户设备与所述第一调度层的用户设备的效用增益, 其中, W为第一 调度层的用户设备在 t时刻进行 VMIMO配对的发射功率为 ^。 对应的发送 数据速率, ^Ι^)为候选用户设备在 t时刻进行 VMIMO配对的发射功率为 。,对应的发送数据速率, 为所述第一调度层的用户设备在 t时刻进行
SIMO的发射功率为 P 。 对应的发送数据速率, ^ 为所述第一调度层的用 户设备在 时间段内的平均发送数据速率 , ( 为候选用户设备在 At时间段 内的平均发送数据速率;
所述第三处理单元, 具体用于根据各候选用户设备与所述第一调度层的 用户设备的效用增益, 确定各候选用户设备与所述第一调度层的用户设备的 最大效用增益, 并确定所述最大效用增益对应的最优候选用户设备, 根据所 述最优候选用户设备与所述第一调度层的用户设备的发射功率组合和所述最 大效用增益, 确定所述最优候选用户设备与所述第一调度层的用户设备的最 优发射功率。
第五方面, 本发明实施例还提供一种基站设备, 包括: 发射机、 接收机、 存储器以及分别与所述发射机、 所述接收机和所述存储器连接的处理器, 其 中, 所述存储器中存储一组程序代码, 且所述处理器用于调用所述存储器中 存储的程序代码, 执行第一方面本发明实施例提供的上述方法中任意一项方 法。
第六方面, 本发明实施例还提供一种基站设备, 包括: 发射机、 接收机、 存储器以及分别与所述发射机、 所述接收机和所述存储器连接的处理器, 其 中, 所述存储器中存储一组程序代码, 且所述处理器用于调用所述存储器中 存储的程序代码, 执行第二方面本发明实施例提供的上述方法中任意一项方 法。
第七方面, 本发明实施例提供一种程序产品, 包括计算机可读介质, 所 述计算机可读介质包括一组程序代码, 用于执行第一方面本发明实施例提 供的上述方法中任意一项方法。
第八方面, 本发明实施例还提供一种程序产品, 包括计算机可读介质, 所述计算机可读介质包括一组程序代码, 用于执行第二方面本发明实施例 提供的上述方法中任意一项方法。
本发明实施例提供的 VMIMO的干扰控制方法及基站设备, 首先通过确 定本小区是否存在边缘用户设备, 若存在边缘用户设备, 则本小区向相邻小 区发送指示消息, 用于通知相邻小区的服务基站本小区存在边缘用户设备, 以便相邻小区的服务基站在获知所述本小区存在边缘用户设备后, 在对相邻 小区内的用户设备进行 VMIMO配对时对各配对用户设备的发射功率进行控 制, 从而使得相邻小区根据该指示消息, 尽量保持该相邻小区和与它相邻的 小区 (如本小区)之间的干扰不变, 即实现了相邻小区存在有用户设备进行 VMIMO 配对前后对本小区的干扰基本一样; 从而减少了相邻小区中存在有 用户设备进行 VMIMO配对时对本小区边缘用户的影响。 附图说明 为了更清楚地说明本发明实施例或现有技术中的技术方案, 下面将对实 施例或现有技术描述中所需要使用的附图作一简单地介绍, 显而易见地, 下 面描述中的附图是本发明的一些实施例, 对于本领域普通技术人员来讲, 在 不付出创造性劳动性的前提下, 还可以根据这些附图获得其他的附图。
图 1为本发明 VMIMO的干扰控制方法实施例一的流程图;
图 2为本发明 VMIMO的干扰控制方法实施例二的流程图;
图 3为本发明 VMIMO的干扰控制方法实施例三的流程图;
图 4为本发明基站设备实施例一的结构示意图;
图 5为本发明基站设备实施例二的结构示意图;
图 6为本发明基站设备实施例三的结构示意图;
图 7为本发明基站设备实施例四的结构示意图;
图 8为本发明基站设备实施例七的结构示意图。 具体实施方式 为使本发明实施例的目的、技术方案和优点更加清楚, 下面将结合本发 明实施例中的附图, 对本发明实施例中的技术方案进行清楚、 完整地描述, 显然, 所描述的实施例是本发明一部分实施例, 而不是全部的实施例。 基于 本发明中的实施例, 本领域普通技术人员在没有作出创造性劳动前提下所获 得的所有其他实施例, 都属于本发明保护的范围。
图 1为本发明 VMIMO的干扰控制方法实施例一的流程图,如图 1所示, 本实施例的方法可以包括:
步骤 101、 基站确定本小区是否存在边缘用户设备, 若存在, 则执行步 骤 102, 否则结束。
边缘用户设备与中心用户设备相比, 离本小区的基站比较远, 接收基站 发出的有用信号少, 所以边缘用户设备的性能差; 若相邻小区中有用户设备 进行 VMIMO配对, 则该相邻小区的发射功率会增加, 因此本小区边缘用户 设备会受到相邻小区更大的干扰, 从而使得边缘用户的性能进一步下降, 为 了防止本小区边缘用户设备性能的进一步下降, 首先基站需要确定本小区是 否存在边缘用户设备, 若本小区存在边缘用户设备, 则基站执行步骤 102中 的行为; 若本小区不存在边缘用户设备, 则基站结束干扰控制行为。
其中, 基站确定本小区是否存在边缘用户设备具体可以为:
基站获取本小区用户设备的 SINR, 若 SINR小于或等于第一预设阈值, 则确定该用户设备为边缘用户设备, 即本小区存在边缘用户设备; 否则确定 该用户设备不是边缘用户设备, 若基站确定本小区所有用户设备都不是边缘 用户设备, 则本小区不存在边缘用户设备。 这是由于, 若 SINR低, 说明该 用户设备接收到的有用信号少, 性能差, 则该用户设备为边缘用户设备; 若 SINR高, 说明该用户设备接收到的有用信号多, 性能好, 该用户设备不是边 缘用户设备。 其中, 本小区的基站可以对用户设备的 SINR进行测量, 也可 以直接获取预先测量好的用户设备的 SINR; 同时第一预设阈值的大小由各小 区的自身情况所决定, 本发明不做限制。
或者, 基站确定本小区是否存在边缘用户设备具体可以为:
基站接收用户设备上报的本小区的参考信号接收功率 (Reference Signal Received Power, 简称为 RSRP )和相邻小区的 RSRP; 若本小区的 RSRP与 相邻小区的 RSRP之间的差值小于或等于第二预设阈值, 则确定用户设备为 边缘用户设备, 即本小区存在边缘用户设备; 否则确定该用户设备不是边缘 用户设备, 若基站确定所有用户设备均不为边缘用户设备, 即本小区不存在 边缘用户设备。 这是由于, 与中心用户设备相比, 边缘用户设备离本小区的 基站远而离相邻小区近, 因此边缘用户设备接收到的本小区的 RSRP小而相 邻小区的 RSRP大, 从而使得边缘用户设备接收到的本小区的 RSRP与相邻 小区的 RSRP的差值小。 其中, 第二预设阈值的大小由各小区的自身情况所 决定, 本发明不做限制。
或者, 基站确定本小区是否存在边缘用户设备具体可以为:
基站统计获取本小区内用户设备的配对概率或配对增益, 若用户设备的 配对概率或配对增益小于第三预设阈值, 则确定用户设备为边缘用户设备, 即本小区存在边缘用户设备; 否则确定该用户设备不是边缘用户设备, 若基 站确定所有用户设备均不为边缘用户设备, 则本小区不存在边缘用户设备。 这是由于, 若用户设备的性能好, 则该用户设备参与 VMIMO配对的概率越 高, 相应地, 该用户设备参与了 VMIMO配对使得系统获得了增益。 其中, 统计获取用户设备的配对概率或配对增益可以为周期性进行统计, 该周期性 时间段由各小区的负载情况所决定; 配对概率对应的预设阈值或配对增益对 应的预设阈值的大小均由各小区的自身情况所决定, 本发明不做限制。
其中, 上述配对概率为在周期性时间段内用户设备处于第二调度层 (已 经与其他用户有配对关系, 再次被用于与另外的用户进行配对)获得的资源 块(Resource Block, 简称为 RB )数比上该用户设备处于第一调度层(首次 参与用户配对)与处于第二调度层获得的 RB数之和。 上述配对增益为周期 性时间段内用户设备处于第二调度层使系统获得的增益比上用户设备处于第 一调度层与处于第二调度层使系统获得的增益之和。
步骤 102、 基站向本小区的相邻小区发送指示消息, 用于通知相邻小区 的服务基站本小区存在边缘用户设备, 以便相邻小区的服务基站在获知本小 区存在边缘用户设备后, 在对相邻小区内的用户设备进行 VMIMO配对时对 各配对用户设备的发射功率进行控制。
为了使边缘用户设备不受到相邻小区更大的干扰, 如果确定本小区存在 边缘用户设备, 则基站向相邻小区发送指示消息, 该指示消息用于通知相邻 小区的服务基站本小区存在边缘用户设备, 以便相邻小区的服务基站在获知 本小区存在边缘用户设备后, 在对相邻小区内的用户设备进行 VMIMO配对 时对各配对用户设备的发射功率进行控制, 以尽量保持相邻小区有用户设备 进行 VMIMO配对时对本小区的干扰与用户设备不进行 VMIMO配对时对本 小区的干扰一样。 这里所述的尽量保持是指保持相邻小区有用户设备进行 VMIMO配对时对本小区的干扰与用户设备不进行 VMIMO配对时对本小区 的干扰之间的差异在容忍范围内,且以下实施例中尽量保持的含义与之相同。 例如可以为尽量保持干扰热噪比 ( Interference over Thermal , 简称为 ΙοΤ )在 相邻小区在有用户设备进行 VMIMO配对时和用户设备不进行 VMIMO配对 时不变, IoT为反映小区间干扰的参数。相邻小区接收到此指示消息后,根据 此指示消息尽量保持该相邻小区和与它相邻的小区 (如本小区等)之间的干 扰不变, 即相邻小区保持有用户设备进行 VMIMO配对时对本小区的干扰与 用户设备不进行 VMIMO配对时对本小区的干扰一样或变化在容忍范围内, 相应的, 由于本小区受到相邻小区的干扰不变或变化在容忍范围内, 因此, 本小区中的边缘用户设备受到相邻小区有用户设备进行 VMIMO配对的影响 减少并且受到相邻小区的干扰基本不会增加, 边缘用户设备性能基本不会进 一步下降。
上述实施例中, 首先根据与用户边缘设备性能相关的参数, 确定本小区 是否存在边缘用户设备, 若存在边缘用户设备, 则向相邻小区发送指示消息, 用于通知相邻小区的服务基站本小区存在边缘用户设备, 以便相邻小区的服 务基站在获知本小区存在边缘用户设备后, 在对相邻小区内的用户设备进行 VMIMO配对时对各配对用户设备的发射功率进行控制, 以尽量保持 IoT不 变, 从而使得相邻小区根据该指示消息, 尽量保持该相邻小区和与它相邻的 小区(如本小区)之间的干扰不变,即实现了相邻小区有用户设备进行 VMIMO 配对前后对本小区的干扰基本一样; 从而减少了相邻小区有用户设备进行 VMIMO配对时对本小区中的边缘用户的影响。
图 2为本发明 VMIMO的干扰控制方法实施例二的流程图, 本实施例中 的本小区是指图 1 所示实施例的相邻小区; 本实施例中的相邻小区是指图 1 所示实施例的本小区。 如图 2所示, 本实施例的方法可以包括:
步骤 201、 基站接收相邻小区发送的指示消息。
如果相邻小区中存在边缘用户设备, 为了使该边缘用户设备不受到本小 区有用户设备进行 VMIMO配对的影响, 则该相邻小区会向与该相邻小区相 邻的本小区发送指示消息, 该指示消息可以指示本小区进行功率控制, 以尽 量保持相邻小区与本小区之间的干扰不变, 例如可以为尽量保持 IoT不变。
步骤 202、 基站根据指示消息, 获知相邻小区存在边缘用户设备, 以在 对本小区用户设备进行 VMIMO配对时, 对各配对用户设备的发射功率进行 控制。
本小区基站接收到相邻小区发送的上述指示消息, 根据此指示消息, 获 知相邻小区存在边缘用户设备, 进而可以获知相邻小区需要本小区尽量保持 与该相邻小区之间的干扰不变的信息, 由于本小区有用户设备进行 VMIMO 配对是为了获得多用户空间复用增益, 提高系统的平均吞吐量, 但是会增加 发射功率, 发射功率的增加导致了本小区与相邻小区之间的干扰增加。 因此, 为了尽量保持本小区与相邻小区之间干扰不变, 本小区的基站需要在对用户 设备进行 VMIMO配对时, 对各配对用户设备的发射功率进行控制, 即本小 区的基站选择合适的用户设备进行 VMIMO配对, 并使各配对用户设备以合 适的发射功率进行发送数据, 从而尽量保持本小区有用户设备进行 VMIMO 配对时对相邻小区的干扰与用户设备不进行 VMIMO配对时对相邻小区的干 扰一样, 相应的, 由于相邻小区受到本小区的干扰基本不变, 因此, 相邻小 区中的边缘用户设备受到本小区有用户设备进行 VMIMO配对的影响较小, 并且受到本小区的干扰基本不会增加, 边缘用户设备性能基本不会进一步下 降。
本实施例中, 通过接收相邻小区发送的指示消息, 并根据指示消息, 获 知相邻小区存在边缘用户设备,以在对本小区用户设备进行 VMIMO配对时, 对各配对用户设备的发射功率进行控制。 实现了本小区有用户设备进行 VMIMO 配对前后对相邻小区的干扰基本一样; 从而减少了本小区中有用户 设备进行 VMIMO配对时对相邻小区边缘用户设备的影响。
图 3为本发明 VMIMO的干扰控制方法实施例三的流程图, 本实施例中 的本小区是指图 1 所示实施例的相邻小区; 本实施例中的相邻小区是指图 1 所示实施例的本小区。 如图 3所示, 本实施例的 VMIMO的干扰控制方法在 图 2所示方法实施例二的基础上更加详细的介绍本发明的技术方案, 本实施 例的方法具体可以包括:
步骤 301、 基站接收相邻小区发送的指示消息。
步骤 302、 基站确定第一调度层的用户设备和第二调度层的各候选用户 设备进行 VMIMO配对时的发射功率组合。
其中, 基站根据 VMIMO配对前后对相邻小区的干扰不变原则, 确定所 述发射功率组合。 基站在确定所述发射功率组合, 并非绝对釆用此原则, 而 是尽量保持 VMIMO配对前后对相邻小区的干扰不变。
若小区的基站接收到 个相邻小区存在边缘用户设备时发送的指示消息, 而且在本小区中, 若用户设备 A处于第一调度层, 处于第二调度层的各候选 用户设备 B有 Bl、 B2...... Bm等 m个不同的候选用户设备, 要尽量保持本 小区与' '个相邻小区之间的干扰不变,即本小区需要尽量保持第一调度层的用 户设备 A 与各候选用户 B 进行 VMIMO 配对后对相邻小区的干扰与进行 VMIMO配对前对相邻小区的干扰一样, 进行 VMIMO配对前即本小区中用 户设备不进行 VMIMO配对, 也就是本小区中的用户设备 A为 SIMO时, 因 此, 为了尽量保持干扰不变, 本小区中第一调度层的用户设备 A与第二调度 层的各候选用户设备 B进行 VMIMO配对的发射功率应满足公式( 1 )
PsiMO A Σ ( = ΡγΜΙΜΟ,Α Σ A (0 + ^ΤΜΙΜΟ,Β Σ (0 其中, 。 为U第一调度层的厶用户设备 A Α进行二 SIMO的厶发射丄功《丄率, 为第一调度层的用户设备 A进行 VMIMO配对的发射功率, PniIM0'B为第二调 度层的候选用户设备 B进行 VMIMO配对的发射功率, ¾(0为第一调度 层的用户设备 Α到相邻小区 i的路损,∑PLB (i)为候选用户设备 B到相邻小区 的路损, 为功率下降步长。
公式( 1 )等号的左边为第一调度层的用户设备 A进行 SIMO时本小区 对 个相邻小区的干扰, 公式(1 )等号的右边为第一调度层的用户设备 A与 各候选用户 B进行 VMIMO配对对 个相邻小区的干扰。 其中公式( 1 ) 可以 转换为: (P P , A)∑PLA(i) = P 0,B PLB (i) , 在各小区建立好后, 则 和∑ £(0均是确定的, 并且 P 。 也是已知的, 需要确定 。 和 ρ
1 VMMO'B
由于 。 是由 PSMO,A下降得来的,为了要表示 PVMMO,A与 PSIMO,A的相对大小 关系, 可以用 IM0'APIM0'A大多少个 dB来表示 , 因此可以得公式 ( 2 ) p
10 lg : ~ - ydB
PvMM0'A , 其中, 在长期演进( Long Term Evolution, 简称为 LTE ) 通信系统中, 发射功率是以 的步长进行下降或者升高, 而且, 的取值是 由 LTE协议的规定来确定, 本发明不做限制, 需要说明的是, 本领域普通技 术人员可以理解, 的取值个数为至少一个。
因此, 基站可以根据公式(1 )和公式(2 )计算第一调度层的用户设备 A和各候选用户设备 B进行 VMIMO配对时的发射功率, 由于 的取值个数 为至少一个, 因此第一调度层的用户设备 A 与各候选用户设备分别进行 VMIMO 配对时的发射功率组合也为至少一个, 即第一调度层的用户设备 A 与候选用户设备 B1进行 VMIMO配对时的发射功率组合也为至少一个, 第 一调度层的用户设备 A与候选用户设备 B2进行 VMIMO配对时的发射功率 组合也为至少一个, 以此类推, 第一调度层的用户设备 A候选用户设备 Bm 进行 VMIMO配对时的发射功率组合也为至少一个。
步骤 303、 基站根据确定的各用户设备的发射功率组合, 确定各候选用 户设备与第一调度层的用户设备进行 VMIMO配对时所产生的配对增量值。
基站由上述计算所得的第一调度层的用户设备 A与各候选用户设备 B 1、 B2 Bm分别进行 VMIMO配对时的至少一个发射功率组合, 分别计算各 个发射功率组合对应地各候选用户设备 B与第一调度层的用户设备 A进行 VMIMO 配对时所产生的配对增益值, 配对增益值为能表示在进行 VMIMO 配对时本小区系统性能的增益量。
也就是, 基站根据上述计算所得的第一调度层的用户设备 A与候选用户 设备 B1进行 VMIMO配对时的至少一个发射功率组合, 分别计算各发射功 率组合对应的候选用户设备 B1与第一调度层的用户设备 A进行 VMIMO配 对时所产生的配对增益值。
基站根据上述计算所得的第一调度层的用户设备 A与候选用户设备 B2 进行 VMIMO配对时的至少一个发射功率组合, 分别计算各发射功率组合对 应的候选用户设备 B2与第一调度层的用户设备 A进行 VMIMO配对时所产 生的配对增益值。
以此类推;
基站根据上述计算所得的第一调度层的用户设备 A与候选用户设备 Bm 进行 VMIMO配对时的至少一个发射功率组合, 分别计算各发射功率组合对 应的候选用户设备 Bm与第一调度层的用户设备 A进行 VMIMO配对时所产 生的配对增益值。
步骤 304、 基站确定各配对增量值中最大的配对增量值对应的最优候选 用户设备并确定最优候选用户设备与第一调度层的用户设备的发射功率组合 中的最优发射功率。
本小区的基站将上述计算所得候选用户设备 B1 与第一调度层的用户设 备 A进行 VMIMO配对时所产生的各配对增益值、 候选用户设备 B2与第一 调度层的用户设备 A进行 VMIMO配对时所产生的各配对增益值、以此类推、 以及候选用户设备 Bm与第一调度层的用户设备 A进行 VMIMO配对时所产 生的各配对增益值进行比较, 可以确定所有的配对增益值中最大的配对增益 值; 然后由该最大的配对增益值可以确定与第一调度层用户 A进行 VMIMO 配对时产生该最大的配对增益值的候选用户设备, 并将该候选用户设备确定 为最优候选用户设备; 最后根据该最大的配对增益值和该最优候选用户设备 与第一调度层的用户设备 A进行 VMIMO配对时的各发射功率组合, 可以确 定该最优候选用户设备与第一调度层的用户设备 A进行 VMIMO配对时产生 该最大的配对增益值时的发射功率组合, 并将该发射功率组合确定为最优发 射功率组合, 其中最优发射功率组合中第一调度层的用户设备 A的发射功率 为第一调度层的用户设备 A的最优发射功率, 最优发射功率组合中最优候选 用户设备的发射功率为该最优候选用户设备的最优发射功率。
步骤 305、 基站将最优候选用户设备与第一调度层的用户设备进行
VMIMO 配对, 并通知最优候选用户设备和第一调度层的用户设备以最优发 射功率发送数据。
本小区的基站调度上述确定的最优候选用户设备与第一调度层的用户设 备进行 VMIMO配对, 并通知该最优候选用户设备和第一调度层的用户设备 以上述确定的各自的最优发射功率发送数据, 即该最优候选用户设备和第一 调度层的用户设备可以在相同的 RB上以各自最优发射功率发送数据。
本实施例中, 基站通过接收相邻小区发送的指示消息, 并根据指示消息, 确定与第一调度层的用户设备进行 VMIMO配对的最优候选用户设备, 以及 确定最优候选用户设备与第一调度层的用户设备的发射功率组合中的最优发 射功率, 然后调度最优候选用户设备与第一调度层的用户设备进行 VMIMO 配对, 并且以各自最优发射功率发送数据。 实现了尽量保持本小区有用户设 备进行 VMIMO配对前后对相邻小区的干扰一样; 从而减少了本小区中有用 户设备进行 VMIMO配对时对相邻小区边缘用户设备的影响, 同时还使得用 户设备进行 VMIMO配对时对本小区系统性能的增益增加。
在本发明 VMIMO的干扰控制方法实施例四中, 上述步骤 303可以具体 为:基站根据 SE = SE^O,A + SEVMM0,S - SE 0计算各候选用户设备与第一调 度层的用户设备的频谱效率增益, 其中, 。 为第一调度层的用户设备进 行 VMIMO配对的发射功率为 Ρ«^Μ。^对应的频谱效率 为候选用户设 备进行 VMIMO 配对的发射功率为 对应的频谱效率, 。 为第一调 度层的用户设备进行 SIMO 的发射功率为 ^。 对应的频谱效率。 上述步骤 304 可以具体为: 基站根据各候选用户设备与第一调度层的用户设备的频谱 效率增益, 确定各候选用户设备与第一调度层的用户设备的最大频谱效率增 益, 并确定最大频谱效率增益对应的最优候选用户设备; 根据最优候选用户 设备与第一调度层的用户设备的发射功率组合和最大频谱效率增益, 确定最 优候选用户设备与第一调度层的用户设备的最优发射功率。 具体地, 由分别计算所得的第一调度层的用户设备 Α与各候选用户设备
Bl、 B2 Bm分别进行 VMIMO配对时的至少一个发射功率组合, 通过公 式( 3 ) ASE ^ SEvMMo,A + SEVMM0^B - SESIM0 A > 0来计算各个发射功率组合对应地各 候选用户设备 B与第一调度层的用户设备 A进行 VMIMO配对时所产生的频 谱效率增益值, 并且该频谱效率增益值应为大于零的值。 频谱效率增益值可 以表示本小区系统的吞吐量增益。 其中, 本领域普通技术人员可以理解, 频 谱效率的获得过程为: 由用户设备的发射功率通过计算得到 SINR, 再根据 SINR的计算值查找 SINR与频谱效率的映射表可以获得发射功率对应下的频 谱效率。
也就是, 基站根据上述计算所得的第一调度层的用户设备 A与候选用户 设备 B1进行 VMIMO配对时的至少一个发射功率组合, 分别计算各发射功 率组合对应的候选用户设备 B1与第一调度层的用户设备 A进行 VMIMO配 对时所产生的大于零的频谱效率增益值。
基站根据上述计算所得的第一调度层的用户设备 A与候选用户设备 B2 进行 VMIMO配对时的至少一个发射功率组合, 分别计算各发射功率组合对 应的候选用户设备 B1与第一调度层的用户设备 A进行 VMIMO配对时所产 生的大于零的频谱效率增益值。
以此类推;
基站根据上述计算所得的第一调度层的用户设备 A与候选用户设备 Bm 进行 VMIMO配对时的至少一个发射功率组合, 分别计算各发射功率组合对 应的候选用户设备 Bm与第一调度层的用户设备 A进行 VMIMO配对时所产 生的大于零的频谱效率增益值。
基站将各候选用户设备 B与第一调度层的用户设备 A进行 VMIMO配对 时产生的大于零的频谱效率增益值进行比较, 可以确定最大的频谱效率增益 值; 然后由该最大的频谱效率增益值可以确定与第一调度层用户 A 进行 VMIMO 配对时产生该最大的频谱效率增益值的候选用户设备, 并将该候选 用户设备确定为最优候选用户设备; 最后根据该最大的频谱效率增益值和该 最优候选用户设备与第一调度层的用户设备 A进行 VMIMO配对时的各发射 功率组合, 可以确定该最优候选用户设备与第一调度层的用户设备 A 进行 VMIMO 配对时产成该最大的频语效率增益值时的发射功率组合, 并将该发 射功率组合确定为最优发射功率组合, 其中最优发射功率组合中第一调度层 的用户设备 A的发射功率为第一调度层的用户设备 A的最优发射功率,最优 发射功率组合中最优候选用户设备的发射功率为该最优候选用户设备的最优 发射功率。
本实施例中, 基站通过接收相邻小区存在边缘用户设备时发送的指示消 息, 并根据指示消息和频谱效率增益值最大化, 确定与第一调度层的用户设 备进行 VMIMO配对的最优候选用户设备, 以及确定最优候选用户设备与第 一调度层的用户设备的发射功率组合中的最优发射功率, 然后调度最优候选 用户设备与第一调度层的用户设备进行 VMIMO配对, 并且以各自最优发射 功率发送数据。 实现了尽量保持本小区存在有用户设备进行 VMIMO配对前 后对相邻小区的干扰一样; 从而减少了本小区有用户设备进行 VMIMO配对 时对相邻小区边缘用户设备的影响, 同时还使得用户设备进行 VMIMO配对 时本小区系统的吞吐量增加。
在本发明 VMIMO的干扰控制方法实施例五中, 上述步骤 303可以具体 为: 基站根据 ) r^ 计算各候选用户设备与第一调度层的 用户设备的效用增益;
其中, )为第一调度层的用户设备在 t时刻进行 VMIMO配对的发射 功率为 0 对应的发送数据速率, W为候选用户设备在 t 时刻进行 VMIMO配对的发射功率为 ^^^ 对应的发送数据速率, W为第一调度层的 用户设备在 t时刻进行 SIMO的发射功率为 对应的发送数据速率, W为 第一调度层的用户设备在 时间段内的平均发送数据速率, 7Β( 为候选用户 设备在 时间段内的平均发送数据速率。 上述步骤 304可以具体为: 基站根 据各候选用户设备与第一调度层的用户设备的效用增益, 确定各候选用户设 备与第一调度层的用户设备的最大效用增益, 并确定最大效用增益对应的最 优候选用户设备; 根据最优候选用户设备与第一调度层的用户设备的发射功 率组合和最大效用增益, 确定最优候选用户设备与第一调度层的用户设备的 最优发射功率。
具体地, 基站由计算所得的第一调度层的用户设备 Α与各候选用户设备
Bl、 B2 Bm分别进行 VMIMO配对时的至少一个发射功率组合, 通过公 式( 4 )来计算各个发射功率组合对应地各候选用户设备 B与第一调度层的用 户设备 A进行 VMIMO配对时所产生的效用增益值, 并且该效用增益值应为 大于零的值。 效用增益值可以表示本小区系统比例公平性。
/ + ^ - 。
其中, 上述的公式(4 )为: W ΓΑ( ;
其中, 本领域普通技术人员可以理解, t时刻的发送数据速率的获得过程 为: 由用户设备 t时刻的发射功率通过计算得到 SINR, 再根据 SINR的计算 值查找 SINR与频谱效率的映射表可以获得频谱效率, 将该频谱效率与该用 户设备获得的 RB数相乘, 即得发射功率对应下的发送数据速率。
也就是, 基站根据上述计算所得的第一调度层的用户设备 A与候选用户 设备 B1进行 VMIMO配对时的至少一个发射功率组合, 分别计算各发射功 率组合对应的候选用户设备 B1与第一调度层的用户设备 A进行 VMIMO配 对时所产生的大于零的效用增益值。
基站根据上述计算所得的第一调度层的用户设备 A与候选用户设备 B2 进行 VMIMO配对时的至少一个发射功率组合, 分别计算各发射功率组合对 应的候选用户设备 B1与第一调度层的用户设备 A进行 VMIMO配对时所产 生的大于零的效用增益值。
以此类推;
基站根据上述计算所得的第一调度层的用户设备 A与候选用户设备 Bm 进行 VMIMO配对时的至少一个发射功率组合, 分别计算各发射功率组合对 应的候选用户设备 Bm与第一调度层的用户设备 A进行 VMIMO配对时所产 生的大于零的效用增益值。
基站将各候选用户设备 B与第一调度层的用户设备 A进行 VMIMO配对 时产生的大于零的效用增益值进行比较, 可以确定最大的效用增益值; 然后 由该最大的效用增益值可以确定与第一调度层用户 A进行 VMIMO配对时产 生该最大的效用增益值的候选用户设备, 并将该候选用户设备确定为最优候 选用户设备; 最后根据该最大的效用增益值和该最优候选用户设备与第一调 度层的用户设备 A进行 VMIMO配对时的各发射功率组合, 可以确定该最优 候选用户设备与第一调度层的用户设备 A进行 VMIMO配对时产成该最大的 效用增益值时的发射功率组合, 并将该发射功率组合确定为最优发射功率组 合, 其中最优发射功率组合中第一调度层的用户设备 A的发射功率为第一调 度层的用户设备 A的最优发射功率, 最优发射功率组合中最优候选用户设备 的发射功率为该最优候选用户设备的最优发射功率。
本实施例中, 通过接收相邻小区发送的指示消息, 并根据指示消息和效 用增益值最大化, 确定与第一调度层的用户设备进行 VMIMO配对的最优候 选用户设备, 以及确定最优候选用户设备与第一调度层的用户设备的发射功 率组合中的最优发射功率, 然后调度最优候选用户设备与第一调度层的用户 设备进行 VMIMO配对, 并且以各自最优发射功率发送数据。 实现了尽量保 持本小区有用户设备进行 VMIMO配对前后对相邻小区的干扰一样; 从而减 少了本小区中有用户设备进行 VMIMO配对时对相邻小区边缘用户设备的影 响,同时还使得用户设备进行 VMIMO配对时本小区系统的比例公平性增加。
图 4为本发明基站设备实施例一的结构示意图, 如图 4所示, 本实施例 的基站设备可以包括: 确定模块 11和消息发送模块 12, 其中, 确定模块 11 用于确定本小区是否存在边缘用户设备,消息发送模块 12用于若本小区存在 边缘用户, 向本小区的相邻小区发送指示消息, 用于通知相邻小区的服务基 站本小区存在边缘用户设备, 以便相邻小区的服务基站在获知本小区存在边 缘用户设备后 , 在对相邻小区内的用户设备进行 VMIMO配对时对各配对用 户设备的发射功率进行控制。
进一步, 确定模块 11可以具体用于获取本小区中用户设备的 SINR, 若 SINR小于或等于第一预设阈值, 则确定用户设备为边缘用户设备。
或者,确定模块 11可以具体用于接收用户设备上报的本小区的 RSRP和 相邻小区的 RSRP,若本小区的 RSRP与相邻小区的 RSRP之间的差值小于或 等于预设阈值, 则确定用户设备为边缘用户设备。
或者,确定模块 11可以具体用于统计获取本小区内用户设备的配对概率 或配对增益, 若用户设备的配对概率或配对增益小于第三预设阈值, 则确定 用户设备为边缘用户设备。
本实施例的基站设备, 可以用于执行图 1所示方法实施例的技术方案, 其实现原理和技术效果类似, 此处不再赘述。
需要说明的是, 在硬件实现上, 以上消息发送模块 12可以为发射机或收 发机, 对应于硬件实现为收发机。 以上确定模块 11可以以硬件形式内嵌于或 独立于基站的处理器中, 也可以以软件形式存储于基站的存储器中, 以便于 处理器调用执行以上各个模块对应的操作。 该处理器可以为中央处理单元 ( Central Processing Unit, 简称为 CPU ) 、 微处理器、 单片机等。 图 5为本发明基站设备实施例二的结构示意图。 如图 5所示, 该基站包 括发射机 21、 接收机 22、 存储器 23以及分别与发射机 21、 接收机 22和存 储器 23连接的处理器 24。 当然, 基站还可以包括天线、 基带处理部件、 中 射频处理部件、 输入输出装置等通用部件(本实施例未示出) , 本发明实施 例在此不再任何限制。
其中, 存储器中存储一组程序代码, 且处理器 24用于调用存储器 23中 存储的程序代码, 用于执行以下操作:
确定本小区是否存在边缘用户设备; 若本小区存在边缘用户, 通过发射 机 21向本小区的相邻小区发送指示消息,用于通知相邻小区的服务基站本小 区存在边缘用户设备, 以便相邻小区的服务基站在获知本小区存在边缘用户 设备后 , 在对相邻小区内的用户设备进行 VMIMO配对时对各配对用户设备 的发射功率进行控制。
进一步地, 确定本小区是否存在边缘用户设备, 包括: 获取本小区中用 户设备的信号与干扰加噪声比 SINR, 若 SINR小于或等于第一预设阈值, 则 确定用户设备为边缘用户设备; 或者, 接收用户设备上报的本小区的参考信 号接收功率 RSRP和相邻小区的 RSRP,若本小区的 RSRP与相邻小区的 RSRP 之间的差值小于或等于第二预设阈值, 则确定用户设备为边缘用户设备; 或 者, 统计获取本小区内用户设备的配对概率或配对增益, 若用户设备的配对 概率或配对增益小于第三预设阈值, 则确定用户设备为边缘用户设备。
本实施例的基站设备, 可以用于执行图 1所示方法实施例的技术方案, 其实现原理和技术效果类似, 此处不再赘述。
图 6为本发明基站设备实施例三的结构示意图, 如图 6所示, 本实施例 的基站设备可以包括: 消息接收模块 31和处理模块 32, 其中, 消息接收模 块 31用于接收相邻小区发送的指示消息; 处理模块 32用于根据指示消息, 获知相邻小区存在边缘用户设备, 以在对本小区用户设备进行 VMIMO配对 时, 对各配对用户设备的发射功率进行控制。
本实施例的基站设备, 可以用于执行图 2所示方法实施例的技术方案, 其实现原理和技术效果类似, 此处不再赘述。
图 7为本发明基站设备实施例四的结构示意图, 如图 7所示, 本实施例 的基站设备在图 6所示基站设备的基础上,进一步地,处理模块 32可以包括: 第一处理单元 321、 第二处理单元 322、 第三处理单元 323和第四处理单元 324, 其中, 第一处理单元 321 , 用于确定第一调度层的用户设备和第二调度 层的各候选用户设备进行 VMIMO 配对时的发射功率组合; 第二处理单元 322, 用于根据确定的各用户设备的发射功率组合, 确定各候选用户设备与第 一调度层的用户设备进行 VMIMO配对时所产生的配对增量值; 第三处理单 元 323 , 用于确定各配对增量值中最大的配对增量值对应的最优候选用户设 备并确定最优候选用户设备与第一调度层的用户设备的发射功率组合中的最 优发射功率; 第四处理单元 324, 用于将最优候选用户设备与第一调度层的 用户设备进行 VMIMO配对, 并通知最优候选用户设备和第一调度层的用户 设备以最优发射功率发送数据。
其 中 , 第 一 处 理 单 元 321 , 具 体 可 以 用 于 根 据 p
PS1MO,A∑PLA (0 - PVMMO,A∑PLA (0 + PVMM0,B (0 101g^^ =
i i i 和 VMMO,A 计算处于第 一调度层的用户设备和各候选用户设备进行 VMIMO配对时的发射功率; 其中, Ρ^。 为第一调度层的用户设备进行 SIMO的发射功率, ΡηαΜ0'Α为 第一调度层的用户设备进行 VMIMO配对的发射功率, Pm。,s为候选用户设 备进行 VMIMO配对的发射功率, ¾(0为第一调度层的用户设备到相邻小 区 的路损, ¾(0为候选用户设备到相邻小区' '的路损, 为功率下降步长。 本实施例的基站设备, 可以用于执行图 3所示方法实施例的技术方案, 其实现原理和技术效果类似, 此处不再赘述。
在本发明基站设备实施例五中, 上述第二处理单元 322可以具体用于根 据 = SE 0,A + SE 0 B - SE 0计算各候选用户设备与第一调度层的用 户设备的频谱效率增益,其中, SEvMIM0'A为第一调度层的用户设备进行 VMIMO 配对的发射功率为 对应的频谱效率, 0 'B为候选用户设备进行 VMIMO配对的发射功率为 对应的频谱效率, 。 为第一调度层的用 户设备进行 SIMO的发射功率为 对应的频谱效率。
本实施例中, 上述第三处理单元 323可以具体用于根据各候选用户设备 与第一调度层的用户设备的频谱效率增益, 确定各候选用户设备与第一调度 层的用户设备的最大频谱效率增益, 并确定最大频谱效率增益对应的最优候 选用户设备, 根据最优候选用户设备与第一调度层的用户设备的发射功率组 合和最大频谱效率增益, 确定最优候选用户设备与第一调度层的用户设备的 最优发射功率。
本实施例的基站设备, 可以用于执行本发明 VMIMO的干扰控制方法实 施例四所示方法实施例的技术方案, 其实现原理和技术效果类似, 此处不再
、 、'在本发明基站设备实施例六中, 上述第二处理单元 322可以具体用于根 据 (0 ~B (t) A { ) 计算各候选用户设备与第一调度层的用户设备 的效用增益;
其中, 为第一调度层的用户设备在 t时刻进行 VMIMO配对的发射 功率为 PvMIM0'A对应的发送数据速率, w为候选用户设备在 t 时刻进行 VMIMO配对的发射功率为 ^^^对应的发送数据速率, W为第一调度层的 用户设备在 t时刻进行 SIMO的发射功率为 P^。 对应的发送数据速率, W为 第一调度层的用户设备在 时间段内的平均发送数据速率, W为候选用户 设备在 ^时间段内的平均发送数据速率。
在本实施例中, 上述第三处理单元 323可以具体用于根据各候选用户设 备与第一调度层的用户设备的效用增益, 确定各候选用户设备与第一调度层 的用户设备的最大效用增益,并确定最大效用增益对应的最优候选用户设备, 根据最优候选用户设备与第一调度层的用户设备的发射功率组合和最大效用 增益, 确定最优候选用户设备与第一调度层的用户设备的最优发射功率。
本实施例的基站设备, 可以用于执行本发明 VMIMO的干扰控制方法实 施例五所示方法实施例的技术方案, 其实现原理和技术效果类似, 此处不再 赘述。
需要说明的是, 在硬件实现上, 以上消息接收模块 31可以为接收机或收 发机, 对应于硬件实现为收发机。 以上处理模块 32可以以硬件形式内嵌于或 独立于基站的处理器中, 也可以以软件形式存储于基站的存储器中, 以便于 处理器调用执行以上各个模块对应的操作。该处理器可以为 CPU、微处理器、 单片机等。
图 8为本发明基站设备实施例七的结构示意图, 如图 8所示, 该基站包 括发射机 41、 接收机 42、 存储器 43 以及分别与发射机 41、 接收机 42和存 储器 43连接的处理器 44。 当然, 基站还可以包括天线、 基带处理部件、 中 射频处理部件、 输入输出装置等通用部件(本发明实施未示出) , 本发明实 施例在此不再任何限制。
其中, 存储器 43中存储一组程序代码, 且处理器 44用于调用存储器 43 中存储的程序代码, 用于执行以下操作: 通过接收机 42接收相邻小区发送的 指示消息; 并根据指示消息, 获知相邻小区存在边缘用户设备, 以在对本小 区用户设备进行 VMIMO配对时, 对各配对用户设备的发射功率进行控制。
进一步地, 在对本小区用户设备进行 VMIMO配对时, 对各配对用户设 备的发射功率进行控制, 包括:
确定第一调度层的用户设备和第二调度层的各候选用户设备进行 VMIMO配对时的发射功率组合;
根据确定的各用户设备的发射功率组合, 确定各候选用户设备与第一调 度层的用户设备进行 VMIMO配对时所产生的配对增量值;
确定各配对增量值中最大的配对增量值对应的最优候选用户设备并确定 最优候选用户设备与第一调度层的用户设备的发射功率组合中的最优发射功 率;
将最优候选用户设备与第一调度层的用户设备进行 VMIMO配对, 并通 知最优候选用户设备和第一调度层的用户设备以最优发射功率发送数据。
进一步地, 确定第一调度层的用户设备和第二调度层的各候选用户设备 进 行 VMIMO 配 对 时 的 发 射 功 率 组 合 , 包 括 : 根 据 P , A∑PLA (0 = PVMM0,A∑PLA (0 + Pvm∑PLB ( 和 lOlg^^ = y 计算处于第 一调度层的用户设备和各候选用户设备进行 VMIMO配对时的发射功率, 其 中, ^。,为第一调度层的用户设备进行 SIMO的发射功率, 。^为第一调 度层的用户设备进行 VMIMO配对的发射功率, ^Μΰ £为候选用户设备进行 VMIMO 配对的发射功率, 为第一调度层的用户设备到相邻小区''的 路损, ∑ ¾(0为候选用户设备到相邻小区' '的路损, y为功率下降步长。 更进一步地, 根据确定的各用户设备的发射功率组合, 确定各候选用户 设备与第一调度层的用户设备进行 VMIMO配对时所产生的配对增量值, 包 括: 根据 = ffi—。 + ^nM。,s - ffii。^ > G计算各候选用户设备与第一调度 层的用户设备的频谱效率增益, 其中, 。 为第一调度层的用户设备进行 VMIMO配对的发射功率为 P Ο,Α 的频谱效率, 为候选用户设备 进行 VMIMO配对的发射功率为尸丽0 'Β对应的频语效率, tjsIM0'A为第一调度 层的用户设备进行 SIMO的发射功率为 PsiM0'A对应的频谱效率;
确定各配对增量值中最大的配对增量值对应的最优候选用户设备并确定 最优候选用户设备与第一调度层的用户设备的发射功率组合中的最优发射功 率, 包括: 根据各候选用户设备与第一调度层的用户设备的频谱效率增益, 确定各候选用户设备与第一调度层的用户设备的最大频谱效率增益, 并确定 最大频谱效率增益对应的最优候选用户设备;
根据最优候选用户设备与第一调度层的用户设备的发射功率组合和最大 频谱效率增益, 确定最优候选用户设备与第一调度层的用户设备的最优发射 功率。
或者, 根据确定的各用户设备的发射功率组合, 确定各候选用户设备与 第一调度层的用户设备进行 VMIMO配对时所产生的配对增量值, 包括: 根 据 O rB (t) rA (t) 计算各候选用户设备与第一调度层的用户设备 的效用增益;
其中, W为第一调度层的用户设备在 t时刻进行 VMIMO配对的发射 功率为 PVMMO,A对应的发送数据速率, W为候选用户设备在 t 时刻进行
VMIMO配对的发射功率为 ^^^ 对应的发送数据速率, W为第一调度层的 用户设备在 t时刻进行 SIMO的发射功率为 Ρ^。 对应的发送数据速率, Γ Λ ({) 为第一调度层的用户设备在 时间段内的平均发送数据速率, (0为候选用 户设备在 时间段内的平均发送数据速率;
确定各配对增量值中最大的配对增量值对应的最优候选用户设备并确定 最优候选用户设备与第一调度层的用户设备的发射功率组合中的最优发射功 率, 包括:
根据各候选用户设备与第一调度层的用户设备的效用增益, 确定各候选 用户设备与第一调度层的用户设备的最大效用增益, 并确定最大效用增益对 应的最优候选用户设备;
根据最优候选用户设备与第一调度层的用户设备的发射功率组合和最大 效用增益,确定最优候选用户设备与第一调度层的用户设备的最优发射功率。
本实施例的基站设备, 可以用于执行本发明 VMIMO的干扰控制方法实 施例二至实施例五任一方法实施例所示的技术方案, 其实现原理和技术效果 类似, 此处不再赘述。
本领域普通技术人员可以理解: 实现上述方法实施例的全部或部分步骤 可以通过程序指令相关的硬件来完成, 前述的程序可以存储于一计算机可读 取存储介质中, 该程序在执行时, 执行包括上述方法实施例的步骤; 而前述 的存储介质包括: ROM, RAM, 磁碟或者光盘等各种可以存储程序代码的介 质。
最后应说明的是: 以上各实施例仅用以说明本发明的技术方案, 而非对 其限制; 尽管参照前述各实施例对本发明进行了详细的说明, 本领域的普通 技术人员应当理解:其依然可以对前述各实施例所记载的技术方案进行修改, 或者对其中部分或者全部技术特征进行等同替换; 而这些修改或者替换, 并 不使相应技术方案的本质脱离本发明各实施例技术方案的范围。

Claims

权 利 要求 书
1、一种虚拟多输入多输出 VMIMO的干扰控制方法,其特征在于, 包括: 确定本小区是否存在边缘用户设备;
若存在, 向所述本小区的相邻小区发送指示消息, 用于通知所述相邻小 区的服务基站所述本小区存在边缘用户设备, 以便所述相邻小区的服务基站 在获知所述本小区存在边缘用户设备后, 在对所述相邻小区内的用户设备进 行 VMIMO配对时对各配对用户设备的发射功率进行控制。
2、 根据权利要求 1所述的方法, 其特征在于, 所述确定本小区是否存在 边缘用户设备, 包括:
获取所述本小区中用户设备的信号与干扰加噪声比 SINR;
若所述 SINR小于或等于第一预设阈值, 则确定所述用户设备为边缘用 户设备。
3、 根据权利要求 1所述的方法, 其特征在于, 所述确定本小区是否存在 边缘用户设备, 包括:
接收用户设备上报的所述本小区的参考信号接收功率 RSRP和所述相邻 小区的 RSRP;
若所述本小区的 RSRP与相邻小区的 RSRP之间的差值小于或等于第二 预设阈值, 则确定所述用户设备为边缘用户设备。
4、 根据权利要求 1所述的方法, 其特征在于, 所述确定本小区是否存在 边缘用户设备, 包括:
统计获取所述本小区内用户设备的配对概率或配对增益;
若用户设备的配对概率或配对增益小于第三预设阈值, 则确定所述用户 设备为边缘用户设备。
5、一种虚拟多输入多输出 VMIMO的干扰控制方法,其特征在于, 包括: 接收相邻小区发送的指示消息;
根据所述指示消息, 获知所述相邻小区存在边缘用户设备, 以在对本小 区用户设备进行 VMIMO配对时, 对各配对用户设备的发射功率进行控制。
6、 根据权利要求 5所述的方法, 其特征在于, 所述在对本小区用户设备 进行 VMIMO配对时对各配对用户设备的发射功率进行控制, 包括:
确定第一调度层的用户设备和第二调度层的各候选用户设备进行 VMIMO配对时的发射功率组合;
根据确定的各用户设备的发射功率组合, 确定所述各候选用户设备与所 述第一调度层的用户设备进行 VMIMO配对时所产生的配对增量值;
确定各配对增量值中最大的配对增量值对应的最优候选用户设备并确定 所述最优候选用户设备与所述第一调度层的用户设备的发射功率组合中的最 优发射功率;
将所述最优候选用户设备与所述第一调度层的用户设备进行 VMIMO配 对, 并通知所述最优候选用户设备和所述第一调度层的用户设备以所述最优 发射功率发送数据。
7、 根据权利要求 6所述的方法, 其特征在于, 所述确定第一调度层的用 户设备和第二调度层的各候选用户设备进行 VMIMO 配对时的发射功率组 合, 包括:
根据 P , A∑PLA W = PVWM0,A∑ PLA (i) + PVWM0,B∑ PLB ( 和 lO lg^^ = ydB计 i i i VMIMO, A 算处于第一调度层的用户设备和各候选用户设备进行 VMIMO配对时的发射 功率;
其中, A/M。 为所述第一调度层的用户设备进行单输入多输出 SIMO的发 射功率, ΜΜ。, 为所述第一调度层的用户设备进行 VMIMO配对的发射功率, ^皿。, 为候选用户设备进行 VMIMO配对的发射功率,∑ ¾ (0为所述第一调 度层的用户设备到相邻小区 i的路损, ¾ (0为候选用户设备到相邻小区 i的 路损, y为功率下降步长。
8、 根据权利要求 6或 7所述的方法, 其特征在于, 所述根据确定的各用 户设备的发射功率组合, 确定所述各候选用户设备与所述第一调度层的用户 设备进行 VMIMO配对时所产生的配对增量值, 包括:
ASE - SEVUM0A + SEvm > 0计算所述各候选用户设备与所述 第一调度层的用户设备的频谱效率增益, 其中, ffi W7M( 为所述第一调度层的 用户设备进行 VMIMO配对的发射功率为 ^Μΰ,对应的频谱效率, 8£ 为 候选用户设备进行 VMIMO配对的发射功率为 P 对应的频谱效率, SE 为所述第一调度层的用户设备进行 SIMO 的发射功率为 对应的频谱效 率;
所述确定各配对增量值中最大的配对增量值对应的最优候选用户设备并 确定所述最优候选用户设备与所述第一调度层的用户设备的发射功率组合中 的最优发射功率, 包括:
根据各候选用户设备与所述第一调度层的用户设备的频谱效率增益, 确 定各候选用户设备与所述第一调度层的用户设备的最大频谱效率增益, 并确 定所述最大频谱效率增益对应的最优候选用户设备;
根据所述最优候选用户设备与所述第一调度层的用户设备的发射功率组 合和所述最大频谱效率增益, 确定所述最优候选用户设备与所述第一调度层 的用户设备的最优发射功率。
9、 根据权利要求 6或 7所述的方法, 其特征在于, 所述根据确定的各用 户设备的发射功率组合, 确定所述各候选用户设备与所述第一调度层的用户 设备进行 VMIMO配对时所产生的配对增量值, 包括:
根据 MJ 0计算所述各候选用户设备与所述第一调
Figure imgf000030_0001
度层的用户设备的效用增益, 其中, (0为所述第一调度层的用户设备在 t 时刻进行 VMIMO配对的发射功率为 P^。 对应的发送数据速率, μ(0为候 选用户设备在 t时刻进行 VMIMO配对的发射功率为 PvMIM0'B对应的发送数据速 率, rA (0为所述第一调度层的用户设备在 t时刻进行 SIMO的发射功率为 IM0'A 对应的发送数据速率, ^(0为所述第一调度层的用户设备在 ^时间段内的平 均发送数据速率, 为候选用户设备在 时间段内的平均发送数据速率; 所述确定各配对增量值中最大的配对增量值对应的最优候选用户设备并 确定所述最优候选用户设备与所述第一调度层的用户设备的发射功率组合中 的最优发射功率, 包括:
根据各候选用户设备与所述第一调度层的用户设备的效用增益, 确定各 候选用户设备与所述第一调度层的用户设备的最大效用增益, 并确定所述最 大效用增益对应的最优候选用户设备;
根据所述最优候选用户设备与所述第一调度层的用户设备的发射功率组 合和所述最大效用增益, 确定所述最优候选用户设备与所述第一调度层的用 户设备的最优发射功率。
10、 一种基站设备, 其特征在于, 包括:
确定模块, 用于确定本小区是否存在边缘用户设备;
消息发送模块, 用于若本小区存在边缘用户, 向所述本小区的相邻小区 发送指示消息, 用于通知所述相邻小区的服务基站所述本小区存在边缘用户 设备,以便所述相邻小区的服务基站在获知所述本小区存在边缘用户设备后, 在对所述相邻小区内的用户设备进行虚拟多输入多输出 VMIMO配对时, 对 各配对用户设备的发射功率进行控制。
11、 根据权利要求 10所述的基站设备, 其特征在于, 所述确定模块, 具 体用于获取所述本小区中用户设备的信号与干扰加噪声比 SINR, 若所述 SINR小于或等于第一预设阈值, 则确定所述用户设备为边缘用户设备。
12、 根据权利要求 10所述的基站设备, 其特征在于, 所述确定模块, 具 体用于接收用户设备上报的所述本小区的参考信号接收功率 RSRP和所述相 邻小区的 RSRP,若所述本小区的 RSRP与相邻小区的 RSRP之间的差值小于 或等于第二预设阈值, 则确定所述用户设备为边缘用户设备。
13、 根据权利要求 10所述的基站设备, 其特征在于, 所述确定模块, 具 体用于统计获取所述本小区内用户设备的配对概率或配对增益, 若用户设备 的配对概率或配对增益小于第三预设阈值, 则确定所述用户设备为边缘用户 设备。
14、 一种基站设备, 其特征在于, 包括:
消息接收模块, 用于接收相邻小区发送的指示消息;
处理模块, 用于根据所述指示消息, 获知所述相邻小区存在边缘用户设 备, 以在对本小区用户设备进行虚拟多输入多输出 VMIMO配对时, 对各配 对用户设备的发射功率进行控制。
15、根据权利要求 14所述的基站设备,其特征在于,所述处理模块包括: 第一处理单元, 用于确定第一调度层的用户设备和第二调度层的各候选 用户设备进行 VMIMO配对时的发射功率组合;
第二处理单元, 用于根据确定的各用户设备的发射功率组合, 确定所述 各候选用户设备与所述第一调度层的用户设备进行 VMIMO配对时所产生的 配对增量值;
第三处理单元, 用于确定各配对增量值中最大的配对增量值对应的最优 候选用户设备并确定所述最优候选用户设备与所述第一调度层的用户设备的 发射功率组合中的最优发射功率;
第四处理单元, 用于将所述最优候选用户设备与所述第一调度层的用户 设备进行 VMIMO配对, 并通知所述最优候选用户设备和所述第一调度层的 用户设备以所述最优发射功率发送数据。
16、根据权利要求 15所述的基站设备,其特征在于,所述第一处理单元, 具体用于根据 Ρ ,Α∑ PLA (0 = P M0,A∑ PLA (i) + P 0,B∑ PLB (i)和 lO lg^^- = ydB计算处于第一调度层的用户设备和各候选用户设备进行
ΡνΜΙΜΟ,Α
VMIMO配对时的发射功率; 其中, PsiM0'A为所述第一调度层的用户设备进行 单输入多输出 SIMO的发射功率, Pra^。 为所述第一调度层的用户设备进行
VMIMO配对的发射功率, Ρ|¾Ηί。,£为候选用户设备进行 VMIMO配对的发射 功率, ∑ ¾(0为所述第一调度层的用户设备到相邻小区' '的路损, ∑ ¾(0为 候选用户设备到相邻小区' '的路损, y为功率下降步长。
17、 根据权利要求 15或 16所述的基站设备, 其特征在于,
所述第二处理单元 , 具体用于根据 ASE = SE + SErm - SE 0计 算所述各候选用户设备与所述第一调度层的用户设备的频谱效率增益,其中, Μ 为所述第一调度层的用户设备进行 VMIMO配对的发射功率为 P 对应的频谱效率, 为候选用户设备进行 VMIMO配对的发射功率为 ^^M。,对应的频谱效率, ffiSiM 为所述第一调度层的用户设备进行 SIMO的 发射功率为 Ps M。 ^对应的频谱效率;
所述第三处理单元, 具体用于根据各候选用户设备与所述第一调度层的 用户设备的频谱效率增益, 确定各候选用户设备与所述第一调度层的用户设 备的最大频谱效率增益, 并确定所述最大频谱效率增益对应的最优候选用户 设备, 根据所述最优候选用户设备与所述第一调度层的用户设备的发射功率 组合和所述最大频谱效率增益, 确定所述最优候选用户设备与所述第一调度 层的用户设备的最优发射功率。
18、 根据权利要求 述第二处 理单元, 具体用于根据
Figure imgf000032_0001
户设备与 所述第一调度层的用户设备的效用增益, 其中, 为第一调度层的用户设 备在 t时刻进行 VMIMO配对的发射功率为 P 对应的发送数据速率, r (t) 为候选用户设备在 t时刻进行 VMIMO配对的发射功率为 ^Μΰ 对应的发送数 据速率, r (t)为所述第一调度层的用户设备在 t时刻进行 SIMO的发射功率为 P - SSiIMM。O,A对应的发送数据速率, 为所述第一调度层的用户设备在 时间段内 的平均发送数据速率 , 7 t)为候选用户设备在 ^时间段内的平均发送数据速 率;
所述第三处理单元, 具体用于根据各候选用户设备与所述第一调度层的 用户设备的效用增益, 确定各候选用户设备与所述第一调度层的用户设备的 最大效用增益, 并确定所述最大效用增益对应的最优候选用户设备, 根据所 述最优候选用户设备与所述第一调度层的用户设备的发射功率组合和所述最 大效用增益, 确定所述最优候选用户设备与所述第一调度层的用户设备的最 优发射功率。
19、 一种基站设备, 其特征在于, 包括: 发射机、 接收机、 存储器以及 分别与所述发射机、 所述接收机和所述存储器连接的处理器, 其中, 所述存 储器中存储一组程序代码, 且所述处理器用于调用所述存储器中存储的程序 代码, 执行如权利要求 1-4中任意一项所述的方法。
20、 一种基站设备, 其特征在于, 包括: 发射机、 接收机、 存储器以及 分别与所述发射机、 所述接收机和所述存储器连接的处理器, 其中, 所述存 储器中存储一组程序代码, 且所述处理器用于调用所述存储器中存储的程序 代码, 执行如权利要求 5-9中任意一项所述的方法。
21、 一种计算机程序产品, 其特征在于, 包括计算机可读介质, 所述 计算机可读介质包括一组程序代码, 用于执行如权利要求 1-4中任意一项 所述的方法。
22、 一种计算机程序产品, 其特征在于, 包括计算机可读介质, 所述 计算机可读介质包括一组程序代码, 用于执行如权利要求 5-9中任意一项 所述的方法。
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