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WO2015154295A1 - 一种下行调度的方法及设备 - Google Patents

一种下行调度的方法及设备 Download PDF

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Publication number
WO2015154295A1
WO2015154295A1 PCT/CN2014/075133 CN2014075133W WO2015154295A1 WO 2015154295 A1 WO2015154295 A1 WO 2015154295A1 CN 2014075133 W CN2014075133 W CN 2014075133W WO 2015154295 A1 WO2015154295 A1 WO 2015154295A1
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WO
WIPO (PCT)
Prior art keywords
node
edge user
service node
cooperative
cqi
Prior art date
Application number
PCT/CN2014/075133
Other languages
English (en)
French (fr)
Inventor
史寅科
汪力波
邱玲
王宗杰
张鹏
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 CN201480000436.9A priority Critical patent/CN105191167B/zh
Priority to EP14888902.5A priority patent/EP3116141A4/en
Priority to PCT/CN2014/075133 priority patent/WO2015154295A1/zh
Publication of WO2015154295A1 publication Critical patent/WO2015154295A1/zh
Priority to US15/288,803 priority patent/US20170026984A1/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/12Wireless traffic scheduling
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/50Allocation or scheduling criteria for wireless resources
    • H04W72/54Allocation or scheduling criteria for wireless resources based on quality criteria
    • H04W72/542Allocation or scheduling criteria for wireless resources based on quality criteria using measured or perceived quality
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W84/00Network topologies
    • H04W84/02Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/04Large scale networks; Deep hierarchical networks
    • H04W84/042Public Land Mobile systems, e.g. cellular systems
    • H04W84/045Public Land Mobile systems, e.g. cellular systems using private Base Stations, e.g. femto Base Stations, home Node B

Definitions

  • the present invention relates to the field of communications, and in particular, to a method and device for downlink scheduling. Background technique
  • a macro cell In a traditional cellular soft cell, also called a homogeneous network, a macro cell needs to cover a large area. Due to the path loss and small-scale fading of the wireless channel, the user performance of the cell edge cannot be obtained. Guaranteed, and the user access distance is large, and the user terminal consumes relatively large energy.
  • the concept of heterogeneous network emerges as the times require. Its main idea is to use cell splitting to increase system capacity and improve energy efficiency by reducing the access distance.
  • the heterogeneous network is generated on the basis of the isomorphic network.
  • the specific network deployment method is to arrange several low power nodes (LPNs) according to certain rules within the coverage of the macro cell in the isomorphic network. The area covered by these LPNs is a Picocell.
  • Microcell and Picocell generally use co-channel deployment. Although this co-channel arrangement can improve the overall capacity of the cell, it also brings many problems, such as the change of cell coverage. Frequent switching problems caused by small, small interval interference problems, etc.
  • LPN refers to the macro station (Base Station) as the transmission node T.
  • the area covered is called S .
  • the soft cell there is and.
  • the same cell ID As can be seen from the introduction of the soft cell, since the same cell ID is used by the Microcell and the Picocell in the soft cell, the user does not need to perform frequent handover during the mobile cell movement, and only needs to select an appropriate transmission node to access. Just fine.
  • HSDPA High Speed Downlink Packet Access
  • the reduction of the cell coverage increases the frequency of user switching.
  • serious problems such as dropped calls and dropped calls of the user are caused.
  • the soft cell placement scenario described above can avoid handover in the soft cell, since the transmission node in the soft cell uses the same scrambling code, the cell edge user is used. Severe interference with the same code channel, which seriously reduces the performance of edge users.
  • the macro cell and the LPN can use the Single Frequency Network (SFN) transmission mode for data transmission.
  • SFN Single Frequency Network
  • the LPN and the BS are connected to the CCU through the optical fiber link, and the CCU is concentrated. Control data transmission between LPN and BS. That is, all transport nodes serve a user on the same code channel resource at the same time. The user is not only an edge user but also a non-edge user.
  • the SFN transmission mode can effectively improve the performance of edge users, since LPN and BS need to serve one user simultaneously on the same code channel, the waste of code channel resources is more serious. It can be seen that the SFN transmission scheme is a method to obtain edge user performance improvement at the expense of total throughput, which runs counter to the original intention of proposing heterogeneous network technology.
  • SRM Spatial Reuse Mode
  • the Central Control Unit the Central Control Unit
  • the scheduler does not consider interference results in the transmission node ⁇ ⁇ edge user may bring in the scheduling process, which results in that the user would be enormous edge interfering transmissions of node ⁇ ⁇
  • the co-channel interference is particularly large, which causes the edge user CQI to decrease and the communication rate to decrease.
  • the SRM scheme can utilize the remaining resources of other transport nodes to serve edge users, for hotspot distribution scenarios, this scheme can not only improve edge user performance, but increases the complexity of protocol implementation. Therefore, how to improve the performance of edge users under the condition of improving the utilization of code channel resources is a problem to be solved. Summary of the invention
  • the embodiments of the present invention provide a method and a device for downlink scheduling, which are to solve the problem of how to improve the performance of edge users while obtaining the average throughput rate of SRM.
  • a first aspect a method for downlink scheduling, where the method includes:
  • the macro cell acquires the information of the service node of the edge user and the information of the cooperation node, where the service node refers to the node whose power intensity of the reference signal received by the edge user from all nodes in the soft cell is the first strength, the collaboration A node is a node whose power intensity of a reference signal received by the edge user from all nodes in the soft cell is a second strength, and the edge user refers to the reference signal power. a user whose difference between the first intensity and the second intensity is within a preset threshold;
  • the macro cell performs cooperative scheduling on the edge user according to the information of the service node and the information of the cooperation node;
  • the macro cell informs the serving node and the coordinating node to allocate the same code channel resource to send data to the edge user.
  • the determining, by the macro cell, whether the serving node and the collaboration node can simultaneously schedule the edge user includes:
  • the edge user receives the cooperative scheduling of the serving node and the cooperation node in the current subframe, and calculates, according to the cooperatively-scheduled signal to interference and noise ratio CQI_edge3, the PF priority corresponding to the edge user of the service node.
  • the collaboration node serves a proportional fair PF priority corresponding to the edge user;
  • the service node and the collaboration node respectively serve PF priorities corresponding to other users; if the service node serves the edge user, the PF priority corresponding to the edge service is higher than the PF priority corresponding to other users of the service node service, Then the service node can schedule the edge user;
  • the cooperative node can schedule the edge user.
  • the method further includes:
  • the service node separately schedules the edge user
  • the determining whether the service node can schedule the edge user includes:
  • the edge user receives the individual scheduling of the serving node, calculating, according to the signal to interference and noise ratio CQI_edgel separately scheduled by the service node, the serving node serving the edge user corresponding to
  • the method further includes:
  • the service node and the collaboration node fail to schedule the edge user at the same time, and the service node fails to schedule the edge user, determine whether the collaboration node can schedule the edge user; if yes, The cooperative node separately schedules the edge user;
  • the determining whether the collaboration node can schedule the edge user includes:
  • the cooperative node can separately schedule the edge user.
  • the method further includes:
  • the macro cell receives the CQI information fed back by the edge user by using a differential feedback method; the differential feedback manner is: feeding back a difference between CQI_edgel, CQI_edge2, and CQI_edgel, a difference between CQI_edge3 and CQI_edgel;
  • the threshold values X and Y are set in advance, and if CQI_edge2 is higher than CQI_edgel by X or more, feedback X; if CQI_edge3 is higher than CQI_edgel by Y or more, Y is fed back.
  • the method further includes: if the service node and the collaboration node fail to simultaneously schedule the edge user, and the service node fails to be separate The edge user is scheduled, and the coordinated node fails to separately schedule the edge user, and the macro cell does not schedule the edge user.
  • the method further includes:
  • the central user refers to the reference signal function
  • the difference between the first intensity and the second intensity of the rate is greater than the user within the preset threshold.
  • a second aspect a downlink scheduling device, where the device includes:
  • An acquiring unit configured to acquire information of a service node of the edge user and information of the cooperation node, where the service node refers to a node whose power intensity of the reference signal received by the edge user from all nodes in the soft cell is the first strength,
  • the cooperative node is a node whose power intensity of the reference signal received by the edge user from all nodes in the soft cell is the second strength, and the edge user refers to the first strength and the second strength of the reference signal power. The user whose difference is within the preset threshold;
  • a cooperative scheduling unit configured to perform cooperative scheduling on the edge users according to information of the service node and information of the collaboration node;
  • a determining unit configured to determine whether the service node and the collaboration node can simultaneously schedule the edge user
  • a notification unit configured to notify the service node and the cooperative node to allocate the same code resource to send data to the edge user.
  • the determining unit is specifically configured to:
  • the edge user receives the cooperative scheduling of the serving node and the cooperation node in the current subframe, and calculates a proportional fair PF priority corresponding to the edge user by the serving node according to the signal to interference and noise ratio CQI_edge3 of the cooperative scheduling.
  • Level and the collaboration node serve the PF priority corresponding to the edge user;
  • the service node and the collaboration node respectively serve PF priorities corresponding to other users; if the service node serves the edge user, the PF priority corresponding to the edge service is higher than the PF priority corresponding to other users of the service node service, Then the service node can schedule the edge user;
  • the cooperative node can schedule the edge user.
  • the determining unit is further configured to:
  • the service node separately schedules the edge user
  • the determining whether the service node can schedule the edge user includes: And calculating, in the case that the edge user receives the individual scheduling of the service node, the PF priority corresponding to the edge user by the service node according to the signal to interference and noise ratio CQI_edgel that is separately scheduled by the service node;
  • the service node can separately schedule the edge user.
  • the determining unit is further configured to:
  • the service node and the collaboration node fail to schedule the edge user at the same time, and the service node fails to schedule the edge user, determine whether the collaboration node can schedule the edge user; if yes, The cooperative node separately schedules the edge user;
  • the determining whether the collaboration node can schedule the edge user includes:
  • the edge user receives the individual scheduling of the cooperation node, calculating, according to the signal to interference and noise ratio CQI_edge2 separately scheduled by the collaboration node, the collaboration node serving the edge user corresponding to the
  • the cooperative node can separately schedule the edge user.
  • the device further includes: a receiving unit, where the receiving unit is specifically configured to:
  • the differential feedback is performed by: feeding back the difference between CQI_edgel, CQI_edge2, and CQI_edgel,
  • the threshold values X and Y are set in advance, and if CQI_edge2 is higher than CQI_edgel by X or more, feedback X; if CQI_edge3 is higher than CQI_edgel by Y or more, Y is fed back.
  • the device further includes a processing unit, where the processing unit is specifically configured to:
  • the service node and the collaboration node fail to schedule the edge user at the same time, and the service The node fails to separately schedule the edge user, and the collaboration node fails to separately schedule the edge user, and the edge user is not scheduled.
  • the device further includes a scheduling unit, where the scheduling unit is specifically configured to:: SRM according to a spatial reuse mode
  • the center user is a user in which the difference between the first strength and the second strength of the reference signal power is greater than a preset threshold.
  • the invention obtains the information of the service node of the edge user and the information of the cooperation node, performs cooperative scheduling on the edge user according to the information of the service node and the information of the cooperation node, and determines the service node and the collaboration node. Whether the edge user can be scheduled at the same time, and if yes, informing the service node and the cooperative node to allocate the same code channel resource to send data to the edge user, so that on the basis of code channel multiplexing, the beam is used
  • the cooperative transmission mode serves the edge users and improves the signal-to-noise ratio of the edge users.
  • FIG. 1 is a system architecture diagram of a soft cell provided by the prior art
  • FIG. 2 is a flowchart of a method for downlink scheduling according to an embodiment of the present invention
  • FIG. 3 is a structural diagram of a system for downlink scheduling according to an embodiment of the present invention.
  • FIG. 4 is a graph showing a cumulative probability density function CDF of deita ⁇ Q 1 and deita ⁇ Q 1 according to an embodiment of the present invention
  • FIG. 5 is a schematic diagram of a method for downlink scheduling according to an embodiment of the present disclosure.
  • FIG. 6 is a structural diagram of a device for downlink scheduling according to an embodiment of the present invention.
  • Figure ⁇ is a structural diagram of another downlink scheduling device according to an embodiment of the present invention.
  • FIG. 2 is a flowchart of a method for downlink scheduling according to an embodiment of the present invention. As shown in Figure 2, the method includes the following steps:
  • Step 201 Obtain information of a service node of the edge user and information of the cooperation node, where the service node refers to a node whose power strength of the reference signal received by the edge user from all nodes in the soft cell is the first strength.
  • the cooperative node refers to a node whose power intensity of the reference signal received by the edge user from all nodes in the soft cell is the second strength, and the edge user refers to the first strength and the second strength of the reference signal power. a user who is within a pre-set threshold;
  • the serving node is a node whose power intensity of the reference signal received by the edge user from all the nodes in the soft cell is the first strength, and the coordinated node refers to all the nodes in the soft cell where the edge user is located.
  • the definition of the soft cell edge user is as follows:
  • the transmitting node that causes the greatest interference to the user is the same as the serving node of the user.
  • the user is referred to as a soft cell edge user, and the transmission node that causes the user the greatest interference is recorded as a cooperative node of the user.
  • the definition of the soft cell center user is as follows:
  • FIG. 3 is a structural diagram of a system for downlink scheduling according to an embodiment of the present invention.
  • this embodiment uses a UMTS cellular system with 7 sites and 21 cells.
  • FIG. 3 only shows a schematic diagram of 7 cells, and other cells are generated according to a wrap-around manner, and each of the six sides in the figure
  • the shaped cell represents a soft cell, and four LPNs are placed in each soft cell.
  • the LPN uses the edge fixed distribution scenario as shown in FIG. 3, where ISD represents the distance between the two nearest BSs.
  • each soft cell There are 16 users in each soft cell, users ⁇ The scenes distributed by hotspots, that is, 75% of users are distributed in the LPN coverage area. Two antennas are configured for the LPN, the user, and the base station (corresponding to a certain sector).
  • Softcell O as an example to illustrate the cooperative transmission scheme of the joint beamforming of the present invention. First, each user determines its own service node according to the long-term detection signal broadcast by the transmission node in the soft cell, and determines whether it belongs to the edge user or the center user.
  • the specific criterion is: when the difference between the signal strength of the service node received by the user and the signal strength of the transmission node that receives the most interference is less than 6 dB, and the transmission node that causes the greatest interference to the user is in the same soft cell as the user. When the user is an edge user, the transmission node that causes the user the greatest interference is recorded as the collaboration node of the user. If the user does not satisfy the above criteria, the user is the center user.
  • the method further includes:
  • CQI Channel Quality Indicatio
  • the differential feedback is: feedback CQI_edgel, CQI_edge2 and CQI_edgel difference, CQI_edge3 and CQI_edgel difference;
  • the threshold values X and Y are set in advance, and if CQI_edge2 is higher than CQI_edgel by X or more, feedback X is obtained; if CQI_edge3 is higher than CQI_edgel by Y or more, Y is fed back.
  • PCI e arg max( H- (I £ ®w H ) 2 ) , and find the optimal weC
  • PCI corresponding CQI CQI t .
  • 1 £ is the identity matrix of ⁇
  • L is the multipath number
  • 0 is the 011 ⁇ 2 ⁇ 3 ⁇ 4 product
  • 2 is the second-order norm of the matrix/vector V
  • is the conjugate transpose.
  • the central user uses the 2-bit feedback PCI C and the 5-bit feedback CQI C to the CCU.
  • PCI 3 , PCI 4 ⁇ arg max ⁇ H! -(l L ®w H ) +
  • FIG. 4 is a cumulative probability density function of ddt ⁇ CQ 1 and ddt ⁇ CQ 1 according to an embodiment of the present invention (Cumulative Distribution Function) , CDF) graph.
  • the embodiment of the present invention uses 3-bit feedback ddt ⁇ CQ 1 and de ⁇ 20 ⁇
  • Specific differential feedback strategy Edge users use 7-bit full feedback ⁇ ⁇ ⁇ , CQI i ⁇ , use 5-bit feedback ⁇ PCI 2, deltalCQI ⁇ , use 7- bit feedback ⁇ Pd 3 , PCI 4 , del ta 2CQI ⁇
  • the edge user can acquire CQI 2 and CQI 3 according to CQI i, delta lCQI, delta2CQI.
  • This differential feedback method can reduce the feedback amount of 4 bits compared with the full feedback mode, and the subsequent simulation results show that the differential feedback mode and the full feedback mode The performance gains obtained are comparable.
  • Step 202 Perform cooperative scheduling on the edge user according to the information of the service node and the information of the collaboration node.
  • Step 203 Determine whether the service node and the collaboration node can simultaneously schedule the edge user.
  • the determining whether the serving node and the collaboration node can simultaneously schedule the edge Users including:
  • the edge user receives the cooperative scheduling of the serving node and the cooperative node at the same time in the current subframe, and calculates a proportion fairness of the edge service corresponding to the service node according to the signal to interference and noise ratio CQI_edge3 of the cooperative scheduling (Proportional Fairness, PF) priority and the cooperation node to serve the PF priority corresponding to the edge user;
  • the service node and the collaboration node respectively serve PF priorities corresponding to other users; if the service node serves the edge user, the PF priority corresponding to the edge service is higher than the PF priority corresponding to other users of the service node service, Then the service node can schedule the edge user;
  • the cooperative node can schedule the edge user.
  • Step 204 if yes, informing the serving node and the coordinating node to allocate the same code channel resource to send data to the edge user.
  • the method further includes:
  • the service node separately schedules the edge user
  • the determining whether the service node can schedule the edge user includes:
  • the edge user receives the individual scheduling of the serving node, calculating, according to the signal to interference and noise ratio CQI_edgel separately scheduled by the service node, the serving node serving the edge user corresponding to
  • the service node can separately schedule the edge user.
  • the method further includes:
  • the service node and the collaboration node fail to schedule the edge user at the same time, and the service node fails to schedule the edge user, determine whether the collaboration node can schedule the edge user; if yes, The cooperative node separately schedules the edge user; The determining whether the collaboration node can schedule the edge user includes:
  • the cooperative node can separately schedule the edge user.
  • the method further includes:
  • the method further includes:
  • the central user is invoked according to a Spatial Reuse Mode (SRM), where the central user refers to a user whose difference between the first strength and the second strength of the reference signal power is greater than a preset threshold.
  • SRM Spatial Reuse Mode
  • the CCU first performs grouping according to the service node and the cooperative node serial number information fed back by the user.
  • the service node there are five transmission nodes in one soft cell, so the users are divided into five groups, and each transmission node is responsible for using the node as The data transmission of the service node, the CCU performs independent PF scheduling for each group of users.
  • the following takes the BS as the user group of the service node as an example to illustrate the cooperative scheduling scheme proposed by the present invention.
  • the scheduling process of the users under other transit nodes is the same.
  • the group has P central users, and the edge users, and the set of coordinated nodes that assist the user of the packet edge transmission is the CQI set fed back by the central user.
  • the service node and the cooperative node cooperate with the beamforming CQI collection at the time of transmission.
  • FIG. 5 is a schematic diagram of a method for downlink scheduling according to an embodiment of the present invention.
  • the BS follows ⁇ C ( 3 ⁇ 4 ⁇ , scheduling the central users belonging to the BS group and the edge users, while The cooperating node set C is notified to schedule edge users belonging to the BS group according to ⁇ ° 3 ⁇ 4 ⁇ .
  • the CCU If the BS and the coordinating node are simultaneously scheduled to the same edge user, the CCU notifies the BS and the coordinating node to allocate the same code channel resource to schedule the edge user; if the BS schedules to the edge user, but the coordinating node does not dispatch to the same edge user, Then, the BS reschedules the central users belonging to the BS group and the edge users according to ⁇ °3 ⁇ 4 ⁇ , ⁇ CQ , and if the edge users are scheduled, allocate corresponding resources to schedule the edge users; if neither the BS nor the coordinated nodes are scheduled to the edge users The CCU queries whether the cooperating node has resource remaining.
  • the cooperating node distributes the corresponding resources according to the scheduling edge user, and then the coordinating node allocates corresponding resources to the edge user; if neither the BS nor the coordinating node dispatches to the edge user, And the cooperating node has no remaining resources, and no edge users are scheduled.
  • the invention mainly aims at the problem of waste of spectrum resources in the existing SFN transmission mode in the soft cell and the poor performance of the edge user in the SRM transmission mode, and proposes a cooperative scheduling scheme of joint beamforming.
  • the scheme uses the beam-shaped cooperative transmission mode to serve the edge users, and improves the edge-to-user receiving signal-to-noise ratio.
  • the central user needs to feed back the CQI under the service of the service node
  • the edge user needs to feed back the CQI under the service of the service node, the CQI under the separate service of the cooperative node, the service node and the cooperative node.
  • CQI CQI.
  • the central user does not perform coordinated transmission at all times. Only the edge users can perform coordinated transmission, and the central user schedules according to the PF algorithm.
  • the service node performs scheduling according to the CQI of the cooperative transmission.
  • the cooperative node needs to treat the edge user of the service node as its own user, and also schedules the edge users under the service node according to the CQI of the cooperative transmission, only when the service node and the cooperation node
  • the CCU will notify the service node and the cooperative node to use the beamforming for cooperative transmission; if the service node is scheduled to the edge user, the coordinated node is not scheduled, and the service node is served separately according to the service node.
  • the CQI performs secondary scheduling on the edge user. If scheduled, the CCU allocates resources to the service node for data transmission. If the service node and the cooperative node are not scheduled to the edge user, but the cooperative node has the remaining code channel resources, the coordinated node follows. The CQI scheduling edge user under the separate service of the collaboration node.
  • the SRM scheduling scheme, the cooperative scheduling scheme of the full feedback mode of the present invention, and the cooperative scheduling scheme of the differential feedback mode of the present invention are given in the cell throughput rate, the cell 50% user throughput rate, and the cell worst 5%.
  • User throughput rate is a method of independent PF scheduling transmissions between nodes t
  • the cooperative beamforming cooperative scheduling scheme proposed by the present invention is better than the existing SRM scheme in terms of average throughput, 50% user throughput rate and worst 5% user throughput performance, especially Edge user performance has been greatly improved.
  • the cooperative scheduling scheme of differential feedback has a performance loss compared with the cooperative feedback scheme of full feedback, the performance loss is not very large, especially the edge user performance, which still has a performance gain of 39.23% compared with the SRM scheme.
  • the invention obtains the information of the service node of the edge user and the information of the cooperation node, performs cooperative scheduling on the edge user according to the information of the service node and the information of the cooperation node, and determines the service node and the collaboration node. Whether the edge user can be scheduled at the same time, and if yes, informing the service node and the cooperative node to allocate the same code channel resource to send data to the edge user, so that on the basis of code channel multiplexing, the beam is used
  • the cooperative transmission mode serves the edge users and improves the signal-to-noise ratio of the edge users.
  • FIG. 6 is a structural diagram of a device for downlink scheduling according to an embodiment of the present invention. As shown in FIG. 6, the device includes:
  • the obtaining unit 601 is configured to acquire information about a serving node of the edge user and information of the cooperative node, where the serving node is a node whose reference signal power intensity is the first strength received by the edge user from all nodes in the soft cell.
  • the cooperative node refers to a node whose power intensity of the reference signal received by the edge user from all nodes in the soft cell is the second strength, and the edge user refers to the parameter.
  • the user of the difference between the first strength and the second strength of the signal power is within a preset threshold; wherein, the soft cell edge user is defined as follows:
  • the transmitting node that causes the greatest interference to the user is the same as the serving node of the user.
  • the user is referred to as a soft cell edge user, and the transmission node that causes the user the greatest interference is recorded as a cooperative node of the user.
  • the definition of the soft cell center user is as follows:
  • the device further includes a receiving unit, where the receiving unit is specifically configured to:
  • the differential feedback is performed by: feeding back the difference between CQI_edgel, CQI_edge2, and CQI_edgel,
  • the threshold values X and Y are set in advance, and if CQI_edge2 is higher than CQI_edgel by X or more, feedback X; if CQI_edge3 is higher than CQI_edgel by Y or more, Y is fed back.
  • the cooperation scheduling unit 602 is configured to perform cooperative scheduling on the edge user according to the information of the service node and the information of the collaboration node.
  • the determining unit 603 is configured to determine whether the service node and the collaboration node can simultaneously schedule the edge user;
  • the determining unit 603 is specifically configured to:
  • the edge user receives the cooperative scheduling of the serving node and the cooperation node in the current subframe, and calculates a proportional fair PF priority corresponding to the edge user by the serving node according to the signal to interference and noise ratio CQI_edge3 of the cooperative scheduling.
  • Level and the collaboration node serve the PF priority corresponding to the edge user;
  • the service node and the collaboration node respectively serve PF priorities corresponding to other users; if the service node serves the edge user, the PF priority corresponding to the edge service is higher than the PF priority corresponding to other users of the service node service, Then the service node can schedule the edge user;
  • the notification unit 604 is configured to: if yes, notify the serving node and the cooperative node to allocate the same code channel resource to send data to the edge user.
  • the determining unit 603 is further configured to:
  • the service node separately schedules the edge user
  • the determining whether the service node can schedule the edge user includes:
  • the edge user receives the individual scheduling of the serving node, calculating, according to the signal to interference and noise ratio CQI_edgel separately scheduled by the service node, the serving node serving the edge user corresponding to
  • the service node can separately schedule the edge user.
  • the determining unit 603 is further configured to:
  • the service node and the collaboration node fail to schedule the edge user at the same time, and the service node fails to schedule the edge user, determine whether the collaboration node can schedule the edge user; if yes, The cooperative node separately schedules the edge user;
  • the determining whether the collaboration node can schedule the edge user includes:
  • the cooperative node can separately schedule the edge user.
  • the device further includes a processing unit, where the processing unit is specifically configured to:
  • the service node and the collaboration node fail to schedule the edge user at the same time, and the service The node fails to separately schedule the edge user, and the collaboration node fails to separately schedule the edge user, and the edge user is not scheduled.
  • the device further includes a scheduling unit, where the scheduling unit is specifically configured to:
  • the central user refers to a user whose difference between the first intensity and the second intensity of the reference signal power is greater than a preset threshold.
  • the CCU first groups according to the service node and the cooperative node serial number information fed back by the user.
  • there are five transmission nodes in one soft cell so the users are divided into five groups, and each transmission node is responsible for using the node as The data transmission of the service node, the CCU performs independent PF scheduling for each group of users.
  • the packet has P central users, edge users, and the set of cooperative nodes that assist the packet edge users to transmit is C.
  • the CQI set fed back by the central user is ⁇ °3 ⁇ 4 ⁇
  • the CQI set under the service of the service node fed back by the edge user is ⁇ CQ
  • the CQI set under the separate service of the cooperative node is ⁇ CQI 2 ⁇
  • the service node and the cooperative node use the beam
  • the invention obtains the information of the service node of the edge user and the information of the cooperation node, performs cooperative scheduling on the edge user according to the information of the service node and the information of the cooperation node, and determines the service node and the collaboration node. Whether the edge user can be scheduled at the same time, and if yes, informing the service node and the cooperative node to allocate the same code channel resource to send data to the edge user, so that on the basis of code channel multiplexing, the beam is used
  • the cooperative transmission mode serves the edge users and improves the signal-to-noise ratio of the edge users.
  • FIG. 7 is a structural diagram of another device for downlink scheduling according to an embodiment of the present invention.
  • FIG. 7 is a device 700 according to an embodiment of the present invention.
  • the specific embodiment of the present invention does not limit the specific implementation of the device.
  • the device 700 includes:
  • the processor 701, the communication interface 702, and the memory 703 complete communication with each other via the bus 704.
  • the processor 701 is configured to execute a program.
  • the program can include program code, the program code including computer operating instructions.
  • the processor 701 may be a central processing unit (CPU), or an Application Specific Integrated Circuit (ASIC), or one or more integrated circuits configured to implement embodiments of the present invention.
  • the memory 703 is configured to store a program.
  • the memory 703 may be a volatile memory, such as a random-access memory (RAM), or a non-volatile memory, and a non-volatile memory.
  • RAM random-access memory
  • ROM Read-only memory
  • flash memory flash memory
  • HDD hard disk drive
  • SSD solid-state drive
  • the processor 701 performs the following method according to the program instructions stored in the memory 703: acquiring information of the service node of the edge user and information of the cooperation node, where the service node refers to the reference received by the edge user from all nodes in the soft cell.
  • the node whose signal power strength is the first strength refers to the node whose power intensity of the reference signal received by the edge user from all nodes in the soft cell is the second strength, and the edge user refers to the reference. a user whose difference between the first intensity and the second intensity of the signal power is within a preset threshold;
  • Determining whether the service node and the collaboration node can simultaneously schedule the edge user including:
  • the edge user receives the cooperative scheduling of the serving node and the cooperation node in the current subframe, and calculates a proportional fair PF priority corresponding to the edge user by the serving node according to the signal to interference and noise ratio CQI_edge3 of the cooperative scheduling.
  • Level and the collaboration node serve the PF priority corresponding to the edge user; Comparing that the service node and the collaboration node respectively serve PF priorities corresponding to other users; if the service node serves the edge user, the PF priority corresponding to the edge service is higher than the PF priority corresponding to other users of the service node service, Then the service node can schedule the edge user;
  • the cooperative node can schedule the edge user.
  • the method further includes:
  • the service node separately schedules the edge user
  • the determining whether the service node can schedule the edge user includes:
  • the edge user receives the individual scheduling of the serving node, calculating, according to the signal to interference and noise ratio CQI_edgel separately scheduled by the service node, the serving node serving the edge user corresponding to
  • the service node can separately schedule the edge user.
  • the method further includes:
  • the service node and the collaboration node fail to schedule the edge user at the same time, and the service node fails to schedule the edge user, determine whether the collaboration node can schedule the edge user; if yes, The cooperative node separately schedules the edge user;
  • the determining whether the collaboration node can schedule the edge user includes:
  • the cooperative node can separately schedule the edge user.
  • the method further includes:
  • the differential feedback is performed by: feeding back a difference between CQI_edgel, CQI_edge2, and CQI_edgel, and a difference between CQI_edge3 and CQI_edgel;
  • the threshold values X and Y are set in advance, and if CQI_edge2 is higher than CQI_edgel by X or more, feedback X; if CQI_edge3 is higher than CQI_edgel by Y or more, Y is fed back.
  • the method further includes:
  • the method further includes:
  • the central user refers to a user whose difference between the first intensity and the second intensity of the reference signal power is greater than a preset threshold.
  • the present invention provides a method and a device for downlink scheduling.
  • the method obtains information of a service node of an edge user and information of a collaboration node, and performs information on the edge user according to information of the service node and information of the collaboration node.
  • Cooperating scheduling determining whether the service node and the cooperation node can simultaneously schedule the edge user, and if yes, informing the service node and the cooperation node to allocate the same code channel resource to send data to the edge user, thereby
  • the beam-shaped cooperative transmission mode is used to serve edge users, and the edge user receiving signal-to-noise ratio is improved.

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Abstract

一种下行调度的方法及设备,所述方法通过获取边缘用户的服务节点的信息和协作节点的信息,根据所述服务节点的信息和所述协作节点的信息对所述边缘用户进行协作调度,判断所述服务节点和所述协作节点是否能同时调度所述边缘用户,若是,则通知所述服务节点和所述协作节点分配相同的码道资源向所述边缘用户发送数据,从而在码道复用的基础上,采用波束赋形的协作传输方式服务边缘用户,提高了边缘用户接收信噪比。

Description

一种下行调度的方法及设备 技术领域
本发明涉及通信领域, 尤其涉及到一种下行调度的方法及设备。 背景技术
在传统的蜂窝软小区, 也称为同构网中, 宏小区 (Microcell)需要覆盖很大范 围的区域, 由于无线信道的路损、 小尺度衰落等影响, 导致小区边缘的用户性 能得不到保证, 并且用户接入距离较大, 用户终端能耗也相对较大。 为了进一 步提高蜂窝软小区系统的性能, 异构网的概念应运而生, 它的主要思想是利用 小区分裂提高系统容量, 并通过减小接入距离提高能量效率。 异构网是在同构 网的基础上生成的, 具体布网方式是, 在同构网中宏小区覆盖的范围内按照一 定规则布置几个低功率节点(Low Power Node, LPN ), 我们称这些 LPN覆盖的 区域为敖小区 (Picocell )。
在异构网中, Microcell 和 Picocell —般釆用共信道布置 (co-channel Deployment ), 虽然这种共信道布置结构能提高小区整体容量, 但也带来了许多 问题, 如由于小区覆盖范围变小带来的频繁切换问题、 小区间干扰问题等。
为了解决上述问题, 爱立信提出了联合小区布置 ( Combined Cell Deployment )的场景, 这种布置场景也成为软小区 (Softcell )。 软小区与共信道 布置场景相同, 即也是在 Microcell中布置多个 LPN, 区别是: 由 LPN覆盖的 Picocell与 Microcell具有相同的小区 ID。 如图 1所示, 图 1是现有技术提供的 软小区的系统架构图。 4叚设 Microcell中布置了 W(= 2)个低功率节点( Low Power
Node, LPN ), 将宏小区 ( Base Station )称为传输节点 T。, 覆盖的区域称为 S。, LPN称为传输节点7 ^ ( = 1, ,W ), ^覆盖的区域称为 。 根据软小区的定义, 具有与 。相同的小区 ID。从对软小区的介绍可以看出,由于软小区内的 Microcell 和 Picocell釆用相同的小区 ID, 因此用户在软小区内移动过程中不需要进行频 繁的切换, 只需要选择合适的传输节点接入即可。
对于高速下行分组接入 ( High Speed Downlink Packet Access, HSDPA )异 构网, 釆用共信道布置场景时, 小区覆盖范围的减小增加了用户切换的频率, 从而导致用户掉话、 视频掉线等严重的问题; 虽然釆用上述介绍的软小区布置 场景可以避免软小区内的切换, 但由于软小区内传输节点釆用相同的扰码, 使 小区边缘用户受到严重的同码道干扰, 从而严重降低了边缘用户的性能。
为了提高用户接收信号的质量,宏小区与 LPN可以釆用单频点网络( Single Frequency Network, SFN )传输模式进行数据传输, 在软小区中, LPN与 BS通 过光纤链路与 CCU连接, CCU集中控制 LPN与 BS的数据传输。 即所有传输 节点同时在相同的码道资源上服务一个用户, 该用户不仅仅是边缘用户, 也指 非边缘用户。 虽然 SFN传输模式能有效提高边缘用户的性能, 但由于 LPN与 BS需要在相同码道上同时服务一个用户, 导致码道资源浪费比较严重。 由此可 见, SFN传输方案是一种以牺牲总吞吐量为代价而获得边缘用户性能提升的方 法, 这种方案与提出异构网技术的初衷背道而驰。
为了提高软小区的吞吐量, 各个传输节点的覆盖范围内的用户需要进行码 道复用, 然后釆用空间重用模式( Spatial Reuse Mode, SRM )传输数据。在 SRM 传输模式方案中, 中央控制单元(Central Control Unit, CCU )对 Τ。、 Τι传输节 点下的用户进行独立的调度,在调度过程中没有考虑到传输节点 Τι下调度结果对 边缘用户可能带来的干扰, 这导致该边缘用户会受到传输节点 Τι的巨大干扰, 特 别是在软小区中, 由于传输节点间釆用相同的扰码, 这种共信道干扰尤为巨大, 致使边缘用户 CQI降低、通信速率也随之降低。 虽然 SRM方案可以利用其它传 输节点剩余的资源服务边缘用户, 但对于热点分布场景, 这种方案不仅不能提 高边缘用户性能, 反而增加了协议实现的复杂性。 因此, 如何提高码道资源利 用率的情况下提高边缘用户的性能是有待解决的问题。 发明内容
本发明实施例提供了一种下行调度的方法及设备, 旨在解决如何在获取 SRM相当的平均吞吐率的同时提高边缘用户的性能。
第一方面, 一种下行调度的方法, 所述方法包括:
宏小区获取边缘用户的服务节点的信息和协作节点的信息, 所述服务节点 是指所述边缘用户从所在软小区内所有节点中接收的参考信号功率强度为第一 强度的节点, 所述协作节点是指所述边缘用户从所在软小区内所有节点中接收 的参考信号功率强度为第二强度的节点, 所述边缘用户是指所述参考信号功率 的第一强度和第二强度之差在预先设置的阔值内的用户;
所述宏小区根据所述服务节点的信息和所述协作节点的信息对所述边缘用 户进行协作调度;
所述宏小区判断所述服务节点和所述协作节点是否能同时调度所述边缘用 户;
若是, 则所述宏小区通知所述服务节点和所述协作节点分配相同的码道资 源向所述边缘用户发送数据。
结合第一方面, 在第一方面的第一种可能的实现方式中, 所述宏小区判断 所述服务节点和所述协作节点是否能同时调度所述边缘用户, 包括:
所述边缘用户在当前子帧同时接收所述服务节点和所述协作节点的协作调 度, 根据所述协作调度的信干噪比 CQI_edge3计算所述服务节点服务所述边缘 用户对应的 PF优先级和所述协作节点服务所述边缘用户对应的比例公平 PF优 先级;
比较所述服务节点和所述协作节点分别服务其他用户对应的 PF优先级; 若所述服务节点服务所述边缘用户对应的 PF优先级高于所述服务节点服务 其他用户对应的 PF优先级, 则所述服务节点能调度所述边缘用户;
若所述协作节点服务所述边缘用户对应的 PF优先级高于所述协作节点服务 其他用户对应的 PF优先级, 则所述协作节点能调度所述边缘用户。
结合第一方面或者第一方面的第一种可能的实现方式, 在第一方面的第二 种可能的实现方式中, 所述方法还包括:
若所述服务节点和所述协作节点未能同时调度所述边缘用户, 则判断所述 服务节点是否能调度所述边缘用户;
若是, 则所述服务节点单独调度所述边缘用户;
所述判断所述服务节点是否能调度所述边缘用户, 包括:
在所述边缘用户接收所述服务节点的单独调度的情况下, 根据所述服务节 点单独调度的信干噪比 CQI_edgel计算所述服务节点服务所述边缘用户对应的
PF优先级;
比较所述服务节点服务其他用户对应的 PF优先级;
若所述服务节点服务所述边缘用户对应的 PF优先级高于所述服务节点服务 其他用户对应的 PF优先级, 则所述服务节点能单独调度所述边缘用户。 结合第一方面的第二种可能的实现方式, 在第一方面的第三种可能的实现 方式中, 所述方法还包括:
若所述服务节点和所述协作节点未能同时调度所述边缘用户, 且所述服务 节点未能调度所述边缘用户, 则判断所述协作节点是否能调度所述边缘用户; 若是, 则所述协作节点单独调度所述边缘用户;
所述判断所述协作节点是否能调度所述边缘用户, 包括:
在所述边缘用户接收所述协作节点的单独调度的情况下, 根据所述协作节 点单独调度的信干噪比 CQI_edge2计算所述协作节点服务所述边缘用户对应的 PF优先级;
比较所述协作节点服务其他用户对应的 PF优先级;
若所述协作节点服务所述边缘用户对应的 PF优先级高于所述协作节点服务 其他用户对应的 PF优先级, 则所述协作节点能单独调度所述边缘用户。
结合第一方面的第三种可能的实现方式, 在第一方面的第四种可能的实现 方式中, 所述方法还包括:
所述宏小区接收所述边缘用户釆用差分反馈的方法反馈的 CQI信息; 所述差分反馈的方式为:反馈 CQI_edgel、 CQI_edge2和 CQI_edgel的差值、 CQI_edge3和 CQI_edgel的差值;
或者, 预先设置门限值 X、 Y, 若 CQI_edge2比 CQI_edgel高 X以上, 则 反馈 X; 若 CQI_edge3比 CQI_edgel高 Y以上, 则反馈 Y。
结合第一方面或者第一方面的第一种可能的实现方式或者第一方面的第二 种可能的实现方式或者第一方面的第三种可能的实现方式或者第一方面的第四 种可能的实现方式, 在第一方面的第五种可能的实现方式中, 所述方法还包括: 若所述服务节点和所述协作节点未能同时调度所述边缘用户, 且所述服务 节点未能单独调度所述边缘用户, 所述协作节点未能单独调度所述边缘用户, 则所述宏小区不调度所述边缘用户。
结合第一方面或者第一方面的第一种可能的实现方式或者第一方面的第二 种可能的实现方式或者第一方面的第三种可能的实现方式或者第一方面的第四 种可能的实现方式或者第一方面的第五种可能的实现方式, 在第一方面的第六 种可能的实现方式中, 所述方法还包括:
根据空间重用模式 SRM调度中心用户, 所述中心用户是指所述参考信号功 率的第一强度和第二强度之差大于预先设置的阔值内的用户。
第二方面, 一种下行调度的设备, 所述设备包括:
获取单元, 用于获取边缘用户的服务节点的信息和协作节点的信息, 所述 服务节点是指所述边缘用户从所在软小区内所有节点中接收的参考信号功率强 度为第一强度的节点, 所述协作节点是指所述边缘用户从所在软小区内所有节 点中接收的参考信号功率强度为第二强度的节点, 所述边缘用户是指所述参考 信号功率的第一强度和第二强度之差在预先设置的阔值内的用户;
协作调度单元, 用于根据所述服务节点的信息和所述协作节点的信息对所 述边缘用户进行协作调度;
判断单元, 用于判断所述服务节点和所述协作节点是否能同时调度所述边 缘用户;
通知单元, 用于若是, 则通知所述服务节点和所述协作节点分配相同的码 道资源向所述边缘用户发送数据。
结合第二方面, 在第二方面的第一种可能的实现方式中, 所述判断单元, 具体用于:
所述边缘用户在当前子帧同时接收所述服务节点和所述协作节点的协作调 度, 根据所述协作调度的信干噪比 CQI_edge3计算所述服务节点服务所述边缘 用户对应的比例公平 PF优先级和所述协作节点服务所述边缘用户对应的 PF优 先级;
比较所述服务节点和所述协作节点分别服务其他用户对应的 PF优先级; 若所述服务节点服务所述边缘用户对应的 PF优先级高于所述服务节点服务 其他用户对应的 PF优先级, 则所述服务节点能调度所述边缘用户;
若所述协作节点服务所述边缘用户对应的 PF优先级高于所述协作节点服务 其他用户对应的 PF优先级, 则所述协作节点能调度所述边缘用户。
结合第二方面或者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, 所述判断单元还用于:
若所述服务节点和所述协作节点未能同时调度所述边缘用户, 则判断所述 服务节点是否能调度所述边缘用户;
若是, 则所述服务节点单独调度所述边缘用户;
所述判断所述服务节点是否能调度所述边缘用户, 包括: 在所述边缘用户接收所述服务节点的单独调度的情况下, 根据所述服务节 点单独调度的信干噪比 CQI_edgel计算所述服务节点服务所述边缘用户对应的 PF优先级;
比较所述服务节点服务其他用户对应的 PF优先级;
若所述服务节点服务所述边缘用户对应的 PF优先级高于所述服务节点服务 其他用户对应的 PF优先级, 则所述服务节点能单独调度所述边缘用户。
结合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, 所述判断单元还用于:
若所述服务节点和所述协作节点未能同时调度所述边缘用户, 且所述服务 节点未能调度所述边缘用户, 则判断所述协作节点是否能调度所述边缘用户; 若是, 则所述协作节点单独调度所述边缘用户;
所述判断所述协作节点是否能调度所述边缘用户, 包括:
在所述边缘用户接收所述协作节点的单独调度的情况下, 根据所述协作节 点单独调度的信干噪比 CQI_edge2计算所述协作节点服务所述边缘用户对应的
PF优先级;
比较所述协作节点服务其他用户对应的 PF优先级;
若所述协作节点服务所述边缘用户对应的 PF优先级高于所述协作节点服务 其他用户对应的 PF优先级, 则所述协作节点能单独调度所述边缘用户。
结合第二方面的第三种可能的实现方式, 在第二方面的第四种可能的实现 方式中, 所述设备还包括接收单元, 所述接收单元具体用于:
接收所述边缘用户釆用差分反馈的方法反馈的 CQI信息;
所述差分反馈的方式为:反馈 CQI_edgel、 CQI_edge2和 CQI_edgel的差值、
CQI_edge3和 CQI_edgel的差值;
或者, 预先设置门限值 X、 Y, 若 CQI_edge2比 CQI_edgel高 X以上, 则 反馈 X; 若 CQI_edge3比 CQI_edgel高 Y以上, 则反馈 Y。
结合第二方面或者第二方面的第一种可能的实现方式或者第二方面的第二 种可能的实现方式或者第二方面的第三种可能的实现方式或者第二方面的第四 种可能的实现方式, 在第二方面的第五种可能的实现方式中, 所述设备还包括 处理单元, 所述处理单元具体用于:
若所述服务节点和所述协作节点未能同时调度所述边缘用户, 且所述服务 节点未能单独调度所述边缘用户, 所述协作节点未能单独调度所述边缘用户, 则不调度所述边缘用户。
结合第二方面或者第二方面的第一种可能的实现方式或者第二方面的第二 种可能的实现方式或者第二方面的第三种可能的实现方式或者第二方面的第四 种可能的实现方式或者第二方面的第五种可能的实现方式, 在第二方面的第六 种可能的实现方式中, 所述设备还包括调度单元, 所述调度单元具体用于: 根据空间重用模式 SRM调度中心用户, 所述中心用户是指所述参考信号功 率的第一强度和第二强度之差大于预先设置的阔值内的用户。
本发明通过获取边缘用户的服务节点的信息和协作节点的信息, 根据所述 服务节点的信息和所述协作节点的信息对所述边缘用户进行协作调度, 判断所 述服务节点和所述协作节点是否能同时调度所述边缘用户, 若是, 则通知所述 服务节点和所述协作节点分配相同的码道资源向所述边缘用户发送数据, 从而 在码道复用的基础上, 釆用波束赋形的协作传输方式服务边缘用户, 提高了边 缘用户接收信噪比。 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简单地介绍, 显而易见地, 下面描述 中的附图仅仅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 出创造性劳动的前提下, 还可以根据这些附图获得其他的附图。
图 1是现有技术提供的软小区的系统架构图;
图 2是本发明实施例提供的一种下行调度的方法流程图;
图 3是本发明实施例提供的一种下行调度的系统结构图;
图 4 是本发明实施例提供的一种 deita^Q1和 deita^Q1的累积概率密度函数 CDF曲线图;
图 5是本发明实施例提供的一种下行调度的方法示意图;
图 6是本发明实施例提供的一种下行调度的设备结构图;
图 Ί是本发明实施例提供的另一种下行调度的设备结构图。
具体实施方式
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, 所描述的实施例仅仅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。
参考图 2, 图 2是本发明实施例提供的一种下行调度的方法流程图。 如图 2所 示, 所述方法包括以下步骤:
步骤 201, 获取边缘用户的服务节点的信息和协作节点的信息, , 所述服务 节点是指所述边缘用户从所在软小区内所有节点中接收的参考信号功率强度为 第一强度的节点, 所述协作节点是指所述边缘用户从所在软小区内所有节点中 接收的参考信号功率强度为第二强度的节点, 所述边缘用户是指所述参考信号 功率的第一强度和第二强度之差在预先设置的阔值内的用户;
其中, 所述服务节点是指所述边缘用户从所在软小区内所有节点中接收的 参考信号功率强度为第一强度的节点, 所述协作节点是指所述边缘用户从所在 软小区内所有节点中接收的参考信号功率强度为第二强度的节点, 所述服务节 点的信息包括但不限于所述服务节点的标识(Indentity, ID ), 所述协作节点的 信息包括但不限于所述协作节点的标识 ID。
其中, 软小区边缘用户的定义如下:
当用户到其服务节点的信号强度与其到给该用户带来干扰最大的传输节点 的信号强度之差小于 " dB,且给该用户带来干扰最大的传输节点与该用户的服务 节点在同一个软小区内时, 该用户被称为软小区边缘用户, 同时给该用户带来 最大干扰的传输节点记为该用户的协作节点。
软小区中心用户的定义如下:
对于一个用户如果不满足软小区边缘用户的定义, 则为软小区中心用户。 具体的, 参考图 3, 图 3是本发明实施例提供的一种下行调度的系统结构图。 如图 3所示, 本实施例釆用 7个站点 21个小区的 UMTS蜂窝系统, 图 3仅给出了 7 个小区的示意图, 其他小区按照 wrap-around的方式生成, 图中每个六边形小区 代表一个软小区,每个软小区中放置 4个 LPN, LPN釆用如图 3所示的边缘固定分 布场景, 其中 ISD表示最近的两 BS间的距离。 每个软小区内有 16个用户, 用户釆 用热点分布的场景, 即 75%的用户分布于 LPN覆盖区域。 LPN、 用户、 基站(对 应某个扇区)都配置两根天线。 本实施例以 Softcell O为例, 说明本发明联合波束 赋形的协作传输方案。 首先每个用户根据软小区内传输节点广播的长时探测信 号确定自身的服务节点, 并确定自身是属于边缘用户还是中心用户。 具体判断 准则是: 当用户接收到的服务节点的信号强度与其接收到干扰最大的传输节点 的信号强度之差小于 6dB,且给该用户带来干扰最大的传输节点与该用户在同一 个软小区时, 该用户即为边缘用户, 同时给该用户带来最大干扰的传输节点记 为该用户的协作节点。 如果用户不满足上述判断准则, 则该用户为中心用户。
优选的, 所述方法还包括:
接收所述边缘用户釆用差分反馈的方法反馈的信道质量指示 ( Channel Quality Indicatio CQI )信息;
所述差分反馈的方式为: 反馈 CQI_edgel、 CQI_edge2和 CQI_edgel的差值、 CQI_edge3和 CQI_edgel的差值;
或者, 预先设置门限值 X、 Y, 若 CQI_edge2比 CQI_edgel高 X以上, 则反馈 X; 若 CQI_edge3比 CQI_edgel高 Y以上, 则反馈 Y。
具体的, 对于软小区中心用户, 其通过信道估计获得自身到服务节点的信 道 Η后, 首先从表1列出的预编码码本集合 = {^,^,^,^}中, 选择一个能够最 大化自身接收信号功率的码本作为其预编码矢量, 记为预编码控制指示
( Precoding Control Indicator, PCI ) : PCIe = arg max( H- (I£ ®wH) 2) , 并求出最优 weC
PCI对应的 CQI: CQIt。 其中 1£为 ^ 的单位矩阵, L为多径数, 0为 01½^¾ 积, |v|2为矩阵 /矢量 V的二阶范数, ^为 的共轭转置。 中心用户利用 2比特反 馈 PCIC, 5比特反馈 CQIC给 CCU。
Figure imgf000011_0001
对于软小区边缘用户, 需要反馈三组 {PCI, CQI}。 边缘用户首先通过信道 估计获得其到服务节点以及协作节点的信道 H,、 H2, 然后根据最大化接收信号 功率准则分别获取服务节点单独服务下的 PCI: , 协
Figure imgf000012_0001
作节点单独服务下的 PCI: PCI2=argmax( H2 -(1£ ®wH) ') , 服务节点和协作节点釆 用波束赋形进行协作传输时的 PCI:
{ PCI3 , PCI4 } = arg max^H! -(lL®wH) + ||H2 -(lL®wH) ); 并才艮据最优的 PCI分别求出月良 务节点单独服务下的 CQI: C(¾、 协作节点单独服务下的 CQI: CQI2、 服务节点 和协作节点协作传输下的 CQI: CQI3。 记 iMtoC(¾ =C(¾ _CQI2、 ^/toCQI2=CQI3-CQI 边缘用户全反馈 PCI'、 PCI2、 PCI3、 PCI4、 C(¾, 釆用差 分反馈的方式反馈 CQI2、 CQI3。
记 deltalCQ^CQI'-CQI^ delta 2CQI = CQI3 _C(¾。 参考图 4, 图 4是本发明实施 例提供的一种 ddt^CQ1和 ddt^CQ1的累积概率密度函数( Cumulative Distribution Function, CDF) 曲线图。 从该曲线可以看出, deltalCQI、 delt^CQI的值基本都 小于 14, 因此本发明实施例都釆用 3比特反馈 ddt^CQ1和 de^20^ 下面给出边 缘用户具体的差分反馈策略: 边缘用户釆用 7比特全反馈 { Ραι, CQIi }, 釆用 5 比特反馈 { PCI2, deltalCQI }, 釆用 7比特反馈 { Pd3, PCI4, delta2CQI}。 边缘用户 能根据 CQIi、 deltalCQI、 delta2CQI获取 CQI2和 CQI3。 这种差分反馈方式能比全反 馈方式减少 4比特的反馈量, 并且后面的仿真结果显示, 差分反馈方式与全反馈 方式获得的性能增益相当。
步骤 202,根据所述服务节点的信息和所述协作节点的信息对所述边缘用户 进行协作调度;
步骤 203, 判断所述服务节点和所述协作节点是否能同时调度所述边缘用 户;
可选地, 所述判断所述服务节点和所述协作节点是否能同时调度所述边缘 用户, 包括:
所述边缘用户在当前子帧同时接收所述服务节点和所述协作节点的协作调 度, 根据所述协作调度的信干噪比 CQI_edge3计算所述服务节点服务所述边缘 用户对应的比例公平( Proportional Fairness, PF )优先级和所述协作节点服务所 述边缘用户对应的 PF优先级;
比较所述服务节点和所述协作节点分别服务其他用户对应的 PF优先级; 若所述服务节点服务所述边缘用户对应的 PF优先级高于所述服务节点服务 其他用户对应的 PF优先级, 则所述服务节点能调度所述边缘用户;
若所述协作节点服务所述边缘用户对应的 PF优先级高于所述协作节点服务 其他用户对应的 PF优先级, 则所述协作节点能调度所述边缘用户。
步骤 204, 若是, 则通知所述服务节点和所述协作节点分配相同的码道资源 向所述边缘用户发送数据。
可选地, 所述方法还包括:
若所述服务节点和所述协作节点未能同时调度所述边缘用户, 则判断所述 服务节点是否能调度所述边缘用户;
若是, 则所述服务节点单独调度所述边缘用户;
所述判断所述服务节点是否能调度所述边缘用户, 包括:
在所述边缘用户接收所述服务节点的单独调度的情况下, 根据所述服务节 点单独调度的信干噪比 CQI_edgel计算所述服务节点服务所述边缘用户对应的
PF优先级;
比较所述服务节点服务其他用户对应的 PF优先级;
若所述服务节点服务所述边缘用户对应的 PF优先级高于所述服务节点服务 其他用户对应的 PF优先级, 则所述服务节点能单独调度所述边缘用户。
可选地, 所述方法还包括:
若所述服务节点和所述协作节点未能同时调度所述边缘用户, 且所述服务 节点未能调度所述边缘用户, 则判断所述协作节点是否能调度所述边缘用户; 若是, 则所述协作节点单独调度所述边缘用户; 所述判断所述协作节点是否能调度所述边缘用户, 包括:
在所述边缘用户接收所述协作节点的单独调度的情况下, 根据所述协作节 点单独调度的信干噪比 CQI_edge2计算所述协作节点服务所述边缘用户对应的 PF优先级;
比较所述协作节点服务其他用户对应的 PF优先级;
若所述协作节点服务所述边缘用户对应的 PF优先级高于所述协作节点服务 其他用户对应的 PF优先级, 则所述协作节点能单独调度所述边缘用户。
可选地, 所述方法还包括:
若所述服务节点和所述协作节点未能同时调度所述边缘用户, 且所述服务 节点未能单独调度所述边缘用户, 所述协作节点未能单独调度所述边缘用户, 则不调度所述边缘用户。
可选地, 所述方法还包括:
根据空间重用模式( Spatial Reuse Mode, SRM )调用中心用户, 所述中心 用户是指所述参考信号功率的第一强度和第二强度之差大于预先设置的阔值内 的用户。
具体的, CCU首先根据用户反馈的服务节点、 协作节点序号信息进行分组, 本实施例在一个软小区内有 5个传输节点, 因此用户被分为 5组, 每个传输节点 负责以该节点为服务节点的数据传输, CCU对每个分组的用户进行独立的 PF调 度。 下面以 BS为服务节点的用户分组为例, 说明本发明提出的协作调度方案, 其他传输节点下用户的调度过程相同。 假设该分组有 P个中心用户, 个边缘用 户, 协助该分组边缘用户传输的协作节点集合为 中心用户反馈的 CQI集合为
{ C(¾ }, 边缘用户反馈的服务节点单独服务下的 CQI集合为 { °¾ }、 协作节点单 独服务下的 CQI集合为 { °¾ }、服务节点和协作节点釆用波束赋形进行协作传输 时的 CQI集合 。
参考图 5, 图 5是本发明实施例提供的一种下行调度的方法示意图。 如图 5所 示, BS按照 { C(¾ }、 调度属于 BS分组的中心用户以及边缘用户, 同时 通知协作节点集合 C按照 { °¾ }调度属于 BS分组的边缘用户。 如果 BS和协作节 点同时调度到同一个边缘用户, 则 CCU通知 BS和该协作节点分配相同的码道资 源调度该边缘用户; 如果 BS调度到边缘用户, 但协作节点没有调度到同一个边 缘用户, 则 BS按照 { °¾ }、 {CQ 重新调度属于 BS分组的中心用户以及边缘用 户, 如果调度到该边缘用户, 则分配相应的资源调度该边缘用户; 如果 BS和协 作节点都没调度到边缘用户, CCU会查询协作节点是否有资源剩余, 如果有资 源剩余, 则协作节点按照 调度边缘用户, 然后协作节点分配相应的资源 给边缘用户进行数据传输; 如果 BS和协作节点都没有调度到边缘用户, 并且协 作节点也没有剩余资源, 则不调度边缘用户。
本发明主要针对软小区中已有的 SFN传输模式频谱资源浪费问题、 SRM传 输模式边缘用户性能较差问题, 提出一种联合波束赋形的协作调度方案。
该方案在码道复用的基础上, 釆用波束赋形的协作传输方式服务边缘用户, 提高了边缘用户接收信噪比。 在反馈时, 中心用户需要反馈服务节点单独服务 下的 CQI, 边缘用户需要反馈服务节点单独服务下的 CQI、 协作节点单独服务下 的 CQI、 服务节点和协作节点釆用波束赋形进行协作传输时的 CQI。 在调度时, 中心用户始终不进行协作传输, 只有边缘用户才可能进行协作传输, 中心用户 按照 PF算法调度。 对于边缘用户, 服务节点按照协作传输的 CQI进行调度, 协作 节点需要将服务节点的边缘用户当成自身的用户, 并同样按照协作传输的 CQI 调度服务节点下的边缘用户, 只有当服务节点和协作节点同时调度到同一个边 缘用户时, CCU才会通知服务节点和协作节点釆用波束赋形进行协作传输; 如 果服务节点调度到边缘用户, 协作节点没调度到, 服务节点按照服务节点单独 服务下的 CQI对边缘用户进行二级调度, 如果调度到, 则 CCU分配资源给服务节 点进行数据传输; 如果服务节点和协作节点都没调度到边缘用户, 但协作节点 有剩余码道资源, 则协作节点按照协作节点单独服务下的 CQI调度边缘用户。
下面给出 SRM调度方案、 本发明全反馈方式的协作调度方案以及本发明差 分反馈方式的协作调度方案在小区吞吐率、 小区 50%用户吞吐率、 小区最差 5% 用户吞吐率。其中 SRM调度方案釆用的是传输节点之间独立进行 PF调度的方法 t
Figure imgf000016_0001
表 2
从表 2可以看出, 本发明提出的联合波束赋形的协作调度方案在平均吞 吐量、 50%用户吞吐率以及最差 5%用户吞吐率性能上都要好于现有的 SRM方案, 特别是边缘用户性能得到了巨大提升。 虽然差分反馈的协作调度方案与全反馈 的协作调度方案比性能有所损失, 但性能损失并不是很大, 特别是边缘用户性 能, 与 SRM方案相比仍有 39.23%的性能增益。
本发明通过获取边缘用户的服务节点的信息和协作节点的信息, 根据所述 服务节点的信息和所述协作节点的信息对所述边缘用户进行协作调度, 判断所 述服务节点和所述协作节点是否能同时调度所述边缘用户, 若是, 则通知所述 服务节点和所述协作节点分配相同的码道资源向所述边缘用户发送数据, 从而 在码道复用的基础上, 釆用波束赋形的协作传输方式服务边缘用户, 提高了边 缘用户接收信噪比。
参考图 6, 图 6是本发明实施例提供的一种下行调度的设备结构图。 如图 6所 示, 所述设备包括:
获取单元 601, 用于获取边缘用户的服务节点的信息和协作节点的信息, 所 述服务节点是指所述边缘用户从所在软小区内所有节点中接收的参考信号功率 强度为第一强度的节点, 所述协作节点是指所述边缘用户从所在软小区内所有 节点中接收的参考信号功率强度为第二强度的节点, 所述边缘用户是指所述参 考信号功率的第一强度和第二强度之差在预先设置的阔值内的用户; 其中, 软小区边缘用户的定义如下:
当用户到其服务节点的信号强度与其到给该用户带来干扰最大的传输节点 的信号强度之差小于 " dB,且给该用户带来干扰最大的传输节点与该用户的服务 节点在同一个软小区内时, 该用户被称为软小区边缘用户, 同时给该用户带来 最大干扰的传输节点记为该用户的协作节点。
软小区中心用户的定义如下:
对于一个用户如果不满足软小区边缘用户的定义, 则为软小区中心用户。 优选的, 所述设备还包括接收单元, 所述接收单元具体用于:
接收所述边缘用户釆用差分反馈的方法反馈的 CQI信息;
所述差分反馈的方式为:反馈 CQI_edgel、 CQI_edge2和 CQI_edgel的差值、
CQI_edge3和 CQI_edgel的差值;
或者, 预先设置门限值 X、 Y, 若 CQI_edge2比 CQI_edgel高 X以上, 则 反馈 X; 若 CQI_edge3比 CQI_edgel高 Y以上, 则反馈 Y。
协作调度单元 602,用于根据所述服务节点的信息和所述协作节点的信息对 所述边缘用户进行协作调度;
判断单元 603,用于判断所述服务节点和所述协作节点是否能同时调度所述 边缘用户;
可选地, 所述判断单元 603, 具体用于:
所述边缘用户在当前子帧同时接收所述服务节点和所述协作节点的协作调 度, 根据所述协作调度的信干噪比 CQI_edge3计算所述服务节点服务所述边缘 用户对应的比例公平 PF优先级和所述协作节点服务所述边缘用户对应的 PF优 先级;
比较所述服务节点和所述协作节点分别服务其他用户对应的 PF优先级; 若所述服务节点服务所述边缘用户对应的 PF优先级高于所述服务节点服务 其他用户对应的 PF优先级, 则所述服务节点能调度所述边缘用户;
若所述协作节点服务所述边缘用户对应的 PF优先级高于所述协作节点服务 其他用户对应的 PF优先级, 则所述协作节点能调度所述边缘用户。 通知单元 604, 用于若是, 则通知所述服务节点和所述协作节点分配相同的 码道资源向所述边缘用户发送数据。
可选地, 所述判断单元 603还用于:
若所述服务节点和所述协作节点未能同时调度所述边缘用户, 则判断所述 服务节点是否能调度所述边缘用户;
若是, 则所述服务节点单独调度所述边缘用户;
所述判断所述服务节点是否能调度所述边缘用户, 包括:
在所述边缘用户接收所述服务节点的单独调度的情况下, 根据所述服务节 点单独调度的信干噪比 CQI_edgel计算所述服务节点服务所述边缘用户对应的
PF优先级;
比较所述服务节点服务其他用户对应的 PF优先级;
若所述服务节点服务所述边缘用户对应的 PF优先级高于所述服务节点服务 其他用户对应的 PF优先级, 则所述服务节点能单独调度所述边缘用户。
可选地, 所述判断单元 603还用于:
若所述服务节点和所述协作节点未能同时调度所述边缘用户, 且所述服务 节点未能调度所述边缘用户, 则判断所述协作节点是否能调度所述边缘用户; 若是, 则所述协作节点单独调度所述边缘用户;
所述判断所述协作节点是否能调度所述边缘用户, 包括:
在所述边缘用户接收所述协作节点的单独调度的情况下, 根据所述协作节 点单独调度的信干噪比 CQI_edge2计算所述协作节点服务所述边缘用户对应的 PF优先级;
比较所述协作节点服务其他用户对应的 PF优先级;
若所述协作节点服务所述边缘用户对应的 PF优先级高于所述协作节点服务 其他用户对应的 PF优先级, 则所述协作节点能单独调度所述边缘用户。
可选地, 所述设备还包括处理单元, 所述处理单元具体用于:
若所述服务节点和所述协作节点未能同时调度所述边缘用户, 且所述服务 节点未能单独调度所述边缘用户, 所述协作节点未能单独调度所述边缘用户, 则不调度所述边缘用户。
可选地, 所述设备还包括调度单元, 所述调度单元具体用于:
根据空间重用模式 SRM调度中心用户, 所述中心用户是指所述参考信号功 率的第一强度和第二强度之差大于预先设置的阔值内的用户。
具体的, CCU首先根据用户反馈的服务节点、协作节点序号信息进行分组, 本实施例在一个软小区内有 5个传输节点, 因此用户被分为 5组, 每个传输节 点负责以该节点为服务节点的数据传输, CCU对每个分组的用户进行独立的 PF 调度。下面以 BS为服务节点的用户分组为例,说明本发明提出的协作调度方案, 其他传输节点下用户的调度过程相同。 假设该分组有 P个中心用户, 个边缘用 户, 协助该分组边缘用户传输的协作节点集合为 C。 中心用户反馈的 CQI集合 为 { °¾ }, 边缘用户反馈的服务节点单独服务下的 CQI集合为 {CQ 、 协作节 点单独服务下的 CQI集合为 { CQI2 }、 服务节点和协作节点釆用波束赋形进行协 作传输时的 CQI集合 { CQI3 }。
本发明通过获取边缘用户的服务节点的信息和协作节点的信息, 根据所述 服务节点的信息和所述协作节点的信息对所述边缘用户进行协作调度, 判断所 述服务节点和所述协作节点是否能同时调度所述边缘用户, 若是, 则通知所述 服务节点和所述协作节点分配相同的码道资源向所述边缘用户发送数据, 从而 在码道复用的基础上, 釆用波束赋形的协作传输方式服务边缘用户, 提高了边 缘用户接收信噪比。
图 7是本发明实施例提供的另一种下行调度的设备结构图。 参考图 7, 图 7 是本发明实施例提供的一种设备 700,本发明具体实施例并不对所述设备的具体 实现做限定。 所述设备 700包括:
处理器(processor)701, 通信接口(Communications Interface)702, 存者器 (memory)703 , 总线 704。
处理器 701, 通信接口 702, 存储器 703通过总线 704完成相互间的通信。 通信接口 702, 用于与路由处理服务器进行通信;
处理器 701, 用于执行程序。
具体地, 程序可以包括程序代码, 所述程序代码包括计算机操作指令。 处理器 701可能是一个中央处理器 (central processing unit, CPU ), 或者 是特定集成电路 ASIC ( Application Specific Integrated Circuit ), 或者是被配置成 实施本发明实施例的一个或多个集成电路。
存储器 703, 用于存储程序。 存储器 703 可以是易失性存储器 (volatile memory ), 例如随机存取存储器 ( random-access memory, RAM ), 或者非易失 ')·生存诸器 ( non-volatile memory ), 例 口只读存 4诸器 ( read-only memory, ROM ), 快闪存储器( flash memory ),硬盘( hard disk drive, HDD )或固态硬盘( solid-state drive, SSD )。 处理器 701根据存储器 703存储的程序指令, 执行以下方法: 获取边缘用户的服务节点的信息和协作节点的信息, 所述服务节点是指所 述边缘用户从所在软小区内所有节点中接收的参考信号功率强度为第一强度的 节点, 所述协作节点是指所述边缘用户从所在软小区内所有节点中接收的参考 信号功率强度为第二强度的节点, 所述边缘用户是指所述参考信号功率的第一 强度和第二强度之差在预先设置的阔值内的用户;
根据所述服务节点的信息和所述协作节点的信息对所述边缘用户进行协作 调度;
判断所述服务节点和所述协作节点是否能同时调度所述边缘用户; 若是, 则通知所述服务节点和所述协作节点分配相同的码道资源向所述边 缘用户发送数据。
所述判断所述服务节点和所述协作节点是否能同时调度所述边缘用户, 包 括:
所述边缘用户在当前子帧同时接收所述服务节点和所述协作节点的协作调 度, 根据所述协作调度的信干噪比 CQI_edge3计算所述服务节点服务所述边缘 用户对应的比例公平 PF优先级和所述协作节点服务所述边缘用户对应的 PF优 先级; 比较所述服务节点和所述协作节点分别服务其他用户对应的 PF优先级; 若所述服务节点服务所述边缘用户对应的 PF优先级高于所述服务节点服务 其他用户对应的 PF优先级, 则所述服务节点能调度所述边缘用户;
若所述协作节点服务所述边缘用户对应的 PF优先级高于所述协作节点服务 其他用户对应的 PF优先级, 则所述协作节点能调度所述边缘用户。
所述方法还包括:
若所述服务节点和所述协作节点未能同时调度所述边缘用户, 则判断所述 服务节点是否能调度所述边缘用户;
若是, 则所述服务节点单独调度所述边缘用户;
所述判断所述服务节点是否能调度所述边缘用户, 包括:
在所述边缘用户接收所述服务节点的单独调度的情况下, 根据所述服务节 点单独调度的信干噪比 CQI_edgel计算所述服务节点服务所述边缘用户对应的
PF优先级;
比较所述服务节点服务其他用户对应的 PF优先级;
若所述服务节点服务所述边缘用户对应的 PF优先级高于所述服务节点服务 其他用户对应的 PF优先级, 则所述服务节点能单独调度所述边缘用户。
所述方法还包括:
若所述服务节点和所述协作节点未能同时调度所述边缘用户, 且所述服务 节点未能调度所述边缘用户, 则判断所述协作节点是否能调度所述边缘用户; 若是, 则所述协作节点单独调度所述边缘用户;
所述判断所述协作节点是否能调度所述边缘用户, 包括:
在所述边缘用户接收所述协作节点的单独调度的情况下, 根据所述协作节 点单独调度的信干噪比 CQI_edge2计算所述协作节点服务所述边缘用户对应的 PF优先级;
比较所述协作节点服务其他用户对应的 PF优先级;
若所述协作节点服务所述边缘用户对应的 PF优先级高于所述协作节点服务 其他用户对应的 PF优先级, 则所述协作节点能单独调度所述边缘用户。 所述方法还包括:
接收所述边缘用户釆用差分反馈的方法反馈的 CQI信息;
所述差分反馈的方式为:反馈 CQI_edgel、 CQI_edge2和 CQI_edgel的差值、 CQI_edge3和 CQI_edgel的差值;
或者, 预先设置门限值 X、 Y, 若 CQI_edge2比 CQI_edgel高 X以上, 则 反馈 X; 若 CQI_edge3比 CQI_edgel高 Y以上, 则反馈 Y。
所述方法还包括:
若所述服务节点和所述协作节点未能同时调度所述边缘用户, 且所述服务 节点未能单独调度所述边缘用户, 所述协作节点未能单独调度所述边缘用户, 则不调度所述边缘用户。
所述方法还包括:
根据空间重用模式 SRM调度中心用户, 所述中心用户是指所述参考信号功 率的第一强度和第二强度之差大于预先设置的阔值内的用户。
本发明提供一种下行调度的方法及设备, 所述方法通过获取边缘用户的服 务节点的信息和协作节点的信息, 根据所述服务节点的信息和所述协作节点的 信息对所述边缘用户进行协作调度, 判断所述服务节点和所述协作节点是否能 同时调度所述边缘用户, 若是, 则通知所述服务节点和所述协作节点分配相同 的码道资源向所述边缘用户发送数据, 从而在码道复用的基础上, 釆用波束赋 形的协作传输方式服务边缘用户, 提高了边缘用户接收信噪比。
以上所述, 仅为本发明较佳的具体实施方式, 但本发明的保护范围并不局 限于此, 任何熟悉本技术领域的技术人员在本发明揭露的技术范围内, 可轻易 想到的变化或替换, 都应涵盖在本发明的保护范围之内。 因此, 本发明的保护 范围应该以权利要求的保护范围为准。

Claims

权 利 要 求 书
1、 一种下行调度的方法, 其特征在于, 所述方法包括:
获取边缘用户的服务节点的信息和协作节点的信息, 所述服务节点是指所 述边缘用户从所在软小区内所有节点中接收的参考信号功率强度为第一强度的 节点, 所述协作节点是指所述边缘用户从所在软小区内所有节点中接收的参考 信号功率强度为第二强度的节点, 所述边缘用户是指所述参考信号功率的第一 强度和第二强度之差在预先设置的阔值内的用户;
根据所述服务节点的信息和所述协作节点的信息对所述边缘用户进行调 度;
判断所述服务节点和所述协作节点是否能同时调度所述边缘用户; 若是, 则通知所述服务节点和所述协作节点分配相同的码道资源向所述边 缘用户发送数据。
2、 根据权利要求 1所述的方法, 其特征在于, 所述判断所述服务节点和所 述协作节点是否能同时调度所述边缘用户, 包括:
所述边缘用户在当前子帧同时接收所述服务节点和所述协作节点的协作调 度, 根据所述协作调度的信干噪比 CQI_edge3计算所述服务节点服务所述边缘 用户对应的比例公平 PF优先级和所述协作节点服务所述边缘用户对应的 PF优 先级;
比较所述服务节点和所述协作节点分别服务其他用户对应的 PF优先级; 若所述服务节点服务所述边缘用户对应的 PF优先级高于所述服务节点服务 其他用户对应的 PF优先级, 则所述服务节点能调度所述边缘用户;
若所述协作节点服务所述边缘用户对应的 PF优先级高于所述协作节点服务 其他用户对应的 PF优先级, 则所述协作节点能调度所述边缘用户。
3、 根据权利要求 1或 2所述的方法, 其特征在于, 所述方法还包括: 若所述服务节点和所述协作节点未能同时调度所述边缘用户, 则判断所述 服务节点是否能调度所述边缘用户;
若是, 则所述服务节点单独调度所述边缘用户;
所述判断所述服务节点是否能调度所述边缘用户, 包括:
在所述边缘用户接收所述服务节点的单独调度的情况下, 根据所述服务节 点单独调度的信干噪比 CQI_edgel计算所述服务节点服务所述边缘用户对应的 PF优先级;
比较所述服务节点服务其他用户对应的 PF优先级;
若所述服务节点服务所述边缘用户对应的 PF优先级高于所述服务节点服务 其他用户对应的 PF优先级, 则所述服务节点能单独调度所述边缘用户。
4、 根据权利要求 3所述的方法, 其特征在于, 所述方法还包括:
若所述服务节点和所述协作节点未能同时调度所述边缘用户, 且所述服务 节点未能调度所述边缘用户, 则判断所述协作节点是否能调度所述边缘用户; 若是, 则所述协作节点单独调度所述边缘用户;
所述判断所述协作节点是否能调度所述边缘用户, 包括:
在所述边缘用户接收所述协作节点的单独调度的情况下, 根据所述协作节 点单独调度的信干噪比 CQI_edge2计算所述协作节点服务所述边缘用户对应的 PF优先级;
比较所述协作节点服务其他用户对应的 PF优先级;
若所述协作节点服务所述边缘用户对应的 PF优先级高于所述协作节点服务 其他用户对应的 PF优先级, 则所述协作节点能单独调度所述边缘用户。
5、 根据权利要求 4所述的方法, 其特征在于, 所述方法还包括: 接收所述边缘用户釆用差分反馈的方法反馈的 CQI信息;
所述差分反馈的方式为:反馈 CQI_edgel、 CQI_edge2和 CQI_edgel的差值、 CQI_edge3和 CQI_edgel的差值;
或者, 预先设置门限值 X、 Y, 若 CQI_edge2比 CQI_edgel高 X以上, 则 反馈 X; 若 CQI_edge3比 CQI_edgel高 Y以上, 则反馈 Y。
6、根据权利要求 1-5任意一项所述的方法, 其特征在于,所述方法还包括: 若所述服务节点和所述协作节点未能同时调度所述边缘用户, 且所述服务 节点未能单独调度所述边缘用户, 所述协作节点未能单独调度所述边缘用户, 则不调度所述边缘用户。
7、 根据权利要求 1-6任意一项所述的方法, 其特征在于, 所述方法还包括: 根据空间重用模式 SRM调度中心用户, 所述中心用户是指所述参考信号功 率的第一强度和第二强度之差大于预先设置的阔值内的用户。
8、 一种下行调度的设备, 其特征在于, 所述设备包括:
获取单元, 用于获取边缘用户的服务节点的信息和协作节点的信息, 所述 服务节点是指所述边缘用户从所在软小区内所有节点中接收的参考信号功率强 度为第一强度的节点, 所述协作节点是指所述边缘用户从所在软小区内所有节 点中接收的参考信号功率强度为第二强度的节点, 所述边缘用户是指所述参考 信号功率的第一强度和第二强度之差在预先设置的阔值内的用户;
协作调度单元, 用于根据所述服务节点的信息和所述协作节点的信息对所 述边缘用户进行协作调度;
判断单元, 用于判断所述服务节点和所述协作节点是否能同时调度所述边 缘用户;
通知单元, 用于若是, 则通知所述服务节点和所述协作节点分配相同的码 道资源向所述边缘用户发送数据。
9、 根据权利要求 8所述的设备, 其特征在于, 所述判断单元, 具体用于: 所述边缘用户在当前子帧同时接收所述服务节点和所述协作节点的协作调 度, 根据所述协作调度的信干噪比 CQI_edge3计算所述服务节点服务所述边缘 用户对应的比例公平 PF优先级和所述协作节点服务所述边缘用户对应的 PF优 先级;
比较所述服务节点和所述协作节点分别服务其他用户对应的 PF优先级; 若所述服务节点服务所述边缘用户对应的 PF优先级高于所述服务节点服务 其他用户对应的 PF优先级, 则所述服务节点能调度所述边缘用户;
若所述协作节点服务所述边缘用户对应的 PF优先级高于所述协作节点服务 其他用户对应的 PF优先级, 则所述协作节点能调度所述边缘用户。
10、根据权利要求 8或 9所述的设备, 其特征在于, 所述判断单元还用于: 若所述服务节点和所述协作节点未能同时调度所述边缘用户, 则判断所述 服务节点是否能调度所述边缘用户;
若是, 则所述服务节点单独调度所述边缘用户;
所述判断所述服务节点是否能调度所述边缘用户, 包括:
在所述边缘用户接收所述服务节点的单独调度的情况下, 根据所述服务节 点单独调度的信干噪比 CQI_edgel计算所述服务节点服务所述边缘用户对应的
PF优先级;
比较所述服务节点服务其他用户对应的 PF优先级;
若所述服务节点服务所述边缘用户对应的 PF优先级高于所述服务节点服务 其他用户对应的 PF优先级, 则所述服务节点能单独调度所述边缘用户。
11、 根据权利要求 10所述的设备, 其特征在于, 所述判断单元还用于: 若所述服务节点和所述协作节点未能同时调度所述边缘用户, 且所述服务 节点未能调度所述边缘用户, 则判断所述协作节点是否能调度所述边缘用户; 若是, 则所述协作节点单独调度所述边缘用户;
所述判断所述协作节点是否能调度所述边缘用户, 包括:
在所述边缘用户接收所述协作节点的单独调度的情况下, 根据所述协作节 点单独调度的信干噪比 CQI_edge2计算所述协作节点服务所述边缘用户对应的
PF优先级;
比较所述协作节点服务其他用户对应的 PF优先级;
若所述协作节点服务所述边缘用户对应的 PF优先级高于所述协作节点服务 其他用户对应的 PF优先级, 则所述协作节点能单独调度所述边缘用户。
12、根据权利要求 11所述的设备, 其特征在于, 所述设备还包括接收单元, 所述接收单元具体用于:
接收所述边缘用户釆用差分反馈的方法反馈的 CQI信息;
所述差分反馈的方式为:反馈 CQI_edgel、 CQI_edge2和 CQI_edgel的差值、
CQI_edge3和 CQI_edgel的差值;
或者, 预先设置门限值 X、 Y, 若 CQI_edge2比 CQI_edgel高 X以上, 则 反馈 X; 若 CQI_edge3比 CQI_edgel高 Y以上, 则反馈 Y。
13、 根据权利要求 8-12任意一项所述的设备, 其特征在于, 所述设备还包 括处理单元, 所述处理单元具体用于:
若所述服务节点和所述协作节点未能同时调度所述边缘用户, 且所述服务 节点未能单独调度所述边缘用户, 所述协作节点未能单独调度所述边缘用户, 则不调度所述边缘用户。
14、 根据权利要求 8-13任意一项所述的设备, 其特征在于, 所述设备还包 括调度单元, 所述调度单元具体用于:
根据空间重用模式 SRM调度中心用户, 所述中心用户是指所述参考信号功 率的第一强度和第二强度之差大于预先设置的阔值内的用户。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018170863A1 (zh) * 2017-03-23 2018-09-27 华为技术有限公司 一种波束避让方法及基站

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101019452A (zh) * 2004-07-09 2007-08-15 上海睿智通无线技术有限公司 一种分层软小区无线网络及其接入控制方法
CN101686080A (zh) * 2008-09-24 2010-03-31 中兴通讯股份有限公司 一种多点协作传输方法
CN102130748A (zh) * 2010-01-18 2011-07-20 华为技术有限公司 预编码处理方法以及用户设备和基站
CN102611487A (zh) * 2011-01-24 2012-07-25 中兴通讯股份有限公司 一种多点协作传输下的反馈压缩方法及装置
CN103001678A (zh) * 2011-09-10 2013-03-27 华为技术有限公司 多节点协作传输的方法和装置
WO2013139350A1 (en) * 2012-03-21 2013-09-26 Telefonaktiebolaget L M Ericsson (Publ) Technique for operating a network node in a heterogeneously deployed network

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101778479B (zh) * 2009-01-14 2015-06-17 电信科学技术研究院 一种资源调度方法及装置
CN103155622A (zh) * 2010-10-07 2013-06-12 日本电气株式会社 用于协作多点发送/接收的调度方法和系统
CN103281770B (zh) * 2013-06-27 2015-06-10 电子科技大学 一种实现协作式多点传输调度与功率分配的方法

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101019452A (zh) * 2004-07-09 2007-08-15 上海睿智通无线技术有限公司 一种分层软小区无线网络及其接入控制方法
CN101686080A (zh) * 2008-09-24 2010-03-31 中兴通讯股份有限公司 一种多点协作传输方法
CN102130748A (zh) * 2010-01-18 2011-07-20 华为技术有限公司 预编码处理方法以及用户设备和基站
CN102611487A (zh) * 2011-01-24 2012-07-25 中兴通讯股份有限公司 一种多点协作传输下的反馈压缩方法及装置
CN103001678A (zh) * 2011-09-10 2013-03-27 华为技术有限公司 多节点协作传输的方法和装置
WO2013139350A1 (en) * 2012-03-21 2013-09-26 Telefonaktiebolaget L M Ericsson (Publ) Technique for operating a network node in a heterogeneously deployed network

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See also references of EP3116141A4 *

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2018170863A1 (zh) * 2017-03-23 2018-09-27 华为技术有限公司 一种波束避让方法及基站
US11102695B2 (en) 2017-03-23 2021-08-24 Huawei Technologies Co., Ltd. Beam avoidance method and base station

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