WO2010037320A1 - 小区负荷均衡方法、小区负荷测量方法及装置 - Google Patents

小区负荷均衡方法、小区负荷测量方法及装置 Download PDF

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Publication number
WO2010037320A1
WO2010037320A1 PCT/CN2009/074062 CN2009074062W WO2010037320A1 WO 2010037320 A1 WO2010037320 A1 WO 2010037320A1 CN 2009074062 W CN2009074062 W CN 2009074062W WO 2010037320 A1 WO2010037320 A1 WO 2010037320A1
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WIPO (PCT)
Prior art keywords
cell
load
resource
load information
information
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PCT/CN2009/074062
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English (en)
French (fr)
Inventor
牛卫国
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华为技术有限公司
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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 ES09817234T priority Critical patent/ES2706074T3/es
Priority to EP09817234.9A priority patent/EP2337395B1/en
Priority to EP18188588.0A priority patent/EP3419336B1/en
Publication of WO2010037320A1 publication Critical patent/WO2010037320A1/zh
Priority to US13/069,802 priority patent/US8676186B2/en
Priority to US14/159,622 priority patent/US8958812B2/en

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W28/00Network traffic management; Network resource management
    • H04W28/02Traffic management, e.g. flow control or congestion control
    • H04W28/08Load balancing or load distribution
    • H04W28/086Load balancing or load distribution among access entities
    • H04W28/0861Load balancing or load distribution among access entities between base stations
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00Arrangements for monitoring or testing data switching networks
    • H04L43/08Monitoring or testing based on specific metrics, e.g. QoS, energy consumption or environmental parameters
    • H04L43/0876Network utilisation, e.g. volume of load or congestion level
    • H04L43/0882Utilisation of link capacity
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L43/00Arrangements for monitoring or testing data switching networks
    • H04L43/16Threshold monitoring
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00Traffic control in data switching networks
    • H04L47/10Flow control; Congestion control
    • H04L47/12Avoiding congestion; Recovering from congestion
    • H04L47/125Avoiding congestion; Recovering from congestion by balancing the load, e.g. traffic engineering
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/16Performing reselection for specific purposes
    • H04W36/22Performing reselection for specific purposes for handling the traffic

Definitions

  • the present invention relates to the field of mobile communications technologies, and in particular, to a cell load balancing method, a cell load measuring method and apparatus. Background technique
  • LTE Long Term Evolution
  • LTE is an evolution of 3G (Third Generation Mobile Telecommunications) technology. It improves and enhances 3G air access technology. With the deployment of LTE networks, the future network operation environment becomes more and more complex, reducing the price of network construction. Key factors are increased spectrum utilization, simplified network architecture, lower cost wireless base stations, and enhanced maintainability features.
  • SON Self-organizing Network
  • LB Load Balancing
  • the invention provides a cell load balancing method, a cell load measuring method and a device, so as to ensure a balanced distribution of service load, thereby improving communication quality of the network.
  • the following technical solutions are used in the embodiments of the present invention.
  • a cell load balancing method comprising:
  • a cell load measurement method includes:
  • the priority of the QCI is determined according to the resource usage of the cell, or the remaining resources of the air interface of the cell, or the quality of service level of the service type supported by the cell, or the performance parameter of the cell acquires the resource load of the cell.
  • a device for cell load balancing comprising:
  • a load information obtaining unit configured to acquire load information of the local cell and the neighboring cell
  • a sending unit configured to send a parameter modification request to the neighboring cell when it is determined that the mobility parameter needs to be modified according to the load information of the local cell acquired by the load information unit and the load information of the neighboring cell;
  • an equalizing unit configured to perform a corresponding operation according to the received information of whether the parameters of the neighboring cell feedback are successfully modified.
  • a cell load measuring device includes:
  • the usage status obtaining unit is configured to identify the priority of the QCI according to the resource usage of the cell, or the remaining resources of the air interface of the cell, or the quality of service level of the service type supported by the cell, or obtain the resource load of the cell by using the performance parameter of the cell. .
  • a system for cell load balancing comprising: a first cell node, a second cell node, and a cell load balancing device; wherein, the first cell node and the second cell node are respectively located in two adjacent cells The first cell node and the cell load balancing device are located in the same cell; the cell load balancing device is configured to acquire load information of the current cell from the first cell node, and acquire the load information from the second cell node.
  • the load information of the neighboring cell when determining that the mobility parameter needs to be modified according to the acquired load information of the local cell and the load information of the neighboring cell, sending a parameter modification request to the second cell node;
  • the second cell node according to the parameter modification request sent by the cell load balancing device, modifies the mobility parameter of the local cell, and feeds back information about whether the parameter modification is successful to the cell load balancing device;
  • the cell load balancing device is configured to modify the mobility parameter of the local cell according to the information of whether the parameter fed back by the second cell node is modified.
  • the defects of the current standard can be compensated, the process of load information interaction and the process of parameter modification can be improved, so that the LB solution can be better implemented in the network, and then the communication quality of the network can be improved.
  • FIG. 1 is a schematic flowchart of a method for cell load balancing according to an embodiment of the present invention
  • FIG. 2 is a schematic flowchart of a method for calculating a cell air interface load according to a PRB usage rate according to another embodiment of the present invention
  • FIG. 3 is a schematic flowchart of a method for calculating a cell air interface load according to a minimum number of service units according to another embodiment of the present invention
  • FIG. 4 is a schematic flowchart of a method for calculating a cell air interface load according to a QCI priority of a service according to another embodiment of the present invention
  • FIG. 5 is a schematic flowchart of a method for calculating a cell air interface load according to a cell performance parameter according to another embodiment of the present invention
  • FIG. 6 is a schematic flowchart of carrying out load information interaction by using an event triggering manner according to another embodiment of the present invention.
  • FIG. 7 is a schematic flowchart of carrying out load information interaction in a manner of using a cycle and an event triggering set according to another embodiment of the present invention.
  • FIG. 8 is a schematic flowchart of load information exchange by an MME according to another embodiment of the present invention.
  • FIG. 9 is a schematic flowchart of load information exchange by other network nodes according to another embodiment of the present invention.
  • FIG. 10 is a schematic flowchart of a method for modifying related mobility parameters in a load information interaction process according to another embodiment of the present invention
  • FIG. FIG. 11 is a schematic structural diagram of a cell load balancing apparatus according to another embodiment of the present invention
  • FIG. 12 is a schematic structural diagram of a cell load measuring apparatus according to another embodiment of the present invention.
  • FIG. 1 is a schematic flowchart of a method for cell load balancing according to an embodiment of the present invention, which may include the following steps.
  • S101 Acquire load information of the neighboring cell.
  • the load information of the neighboring cell is obtained by a cell load balancing device, and the device may be a functional entity located inside an evolved Node B (eNB), or may be an eNB itself, or may be an entity independent of the eNB.
  • the cell load balancing device may acquire load information of the neighboring cell from the eNB of the neighboring cell.
  • S102 Determine, according to the load information of the local cell and the load information of the neighboring cell, that the mobility parameter needs to be modified, and send a parameter modification request message to the neighboring cell.
  • the mobility parameters therein include, but are not limited to, cell handover parameters and/or cell reselection parameters.
  • the cell load balancing device acquires the resource usage status of the current cell at any time, for example, before, after or at the same time, acquiring the load information of the neighboring cell; The usage status calculates the load of the own cell.
  • the LB solution in the SON network can be implemented by using the method provided by the embodiment of the present invention, which can improve the capacity of the network, improve the success rate of user access, and reduce the access delay.
  • the resource usage status includes usage status of air interface resources, transmission resources, and hardware resources.
  • the usage of the air interface resource may be represented by a PRB (Physical Resource Unit) usage rate or a minimum number of service units.
  • PRB Physical Resource Unit
  • Over-bandwidth usage or transmission resource usage state is represented; hardware resource usage can be represented by hardware resource processing capability usage or hardware resource usage state.
  • the cell load is calculated by a cell load measurement device, which may be a functional entity located inside the eNB, or may be the eNB itself, or may be an entity independent of the eNB.
  • a cell load measurement device which may be a functional entity located inside the eNB, or may be the eNB itself, or may be an entity independent of the eNB.
  • the following describes the calculation of the air interface resource load based on the air interface resource usage.
  • the estimation of the cell load can be divided into the following four parts:
  • the rate is relatively fixed, and the PRB occupied by it is relatively fixed. Therefore, when calculating the cell load, for these services, the PRB can be directly used. Usage is used to describe its contribution to system load.
  • the rate is variable and can be reduced to zero at some point. Therefore, when calculating the cell load, the PRB usage rate cannot be directly used to describe its contribution to the system load. The PRB usage of non-GBR services needs to be processed before it can be used to describe its contribution to the system load.
  • the load of the cell includes the PRB usage rate of the processed non-GBR service, the PRB usage rate of the GBR service, the PRB usage rate of the signaling bearer, and the PRB usage rate of the common channel.
  • FIG. 2 is a schematic flowchart of a method for calculating a cell air interface load according to a PRB usage rate according to another embodiment of the present invention.
  • S201 Obtain a PRB usage rate of the GBR service, the non-GBR service, the signaling bearer, and the common channel respectively;
  • the cell load balancing device when the cell load balancing device is an eNB-independent entity, the cell load balancing device can obtain the above information from the eNB of the own cell.
  • S202 Process PRB usage of non-GBR services
  • the processing of PRB usage of non-GBR services can be done in one of the following three ways. get on.
  • the load of the cell can be calculated by the following formula:
  • Cell load GBR service PRB usage rate + Signaling bearer PRB usage rate + Common channel PRB usage rate (1)
  • a minimum guaranteed rate is defined according to different QCI (QoS Class Identifier) priorities, where the minimum guaranteed rate is the minimum rate of QoE (Quality of Experience).
  • QCI QoS Class Identifier
  • the corresponding QCI is different.
  • the minimum guaranteed rate of the QCI-compliant service can be defined by referring to the requirements of each QCI service QoS. For example, the minimum guaranteed rate for a non-GBR service with a QCI of 5 is 20K, the minimum guaranteed rate for a non-GBR service with a QCI of 6 is 15K, and the minimum guaranteed rate for a non-GBR service with a QCI of 7 is 10K, and the QCI is 8.
  • the minimum guaranteed rate for non-GBR services is 5K, and the minimum guaranteed rate for non-GBR services with QCI of 9 is 2K.
  • Load scale factor for non-GBR service minimum guaranteed rate / average rate ( 2 )
  • the PRB usage rate for non-GBR services is calculated by the following formula to obtain the load of non-GBR services:
  • Load of non-GBR service PRB usage rate of non-GBR service * Load scale factor of non-GBR service (3)
  • the minimum guaranteed rate and average rate in this method may be the minimum guaranteed rate and average rate of different QCI services in non-GBR services. Or the minimum guaranteed rate and average rate of non-GBR services.
  • the load of the cell can be obtained:
  • Cell load GBR service PRB usage rate + signaling bearer PRB usage rate + common channel PRB usage rate + (PRB usage rate of QCIx service * load ratio factor of QCIx) (4)
  • the load of the non-GBR service the minimum guaranteed rate of the non-GBR service, the PRB usage rate of the non-GBR service (6)
  • the minimum guaranteed rate is the minimum guaranteed rate of different QCI services
  • the preset coefficient is the number of services of each QCI service
  • the processing of the PRB usage rate of the non-GBR service is calculated by the following formula to obtain the load of the non-GBR service:
  • Cell load GBR service PRB usage rate + Signaling bearer PRB usage rate + Common channel PRB usage rate + Non-GBR service minimum guaranteed rate service PRB usage rate * Non-GBR service number of services
  • the calculation of the cell can also be obtained by another calculation as follows:
  • Cell load 081 service PRB usage rate + signaling bearer PRB usage rate + common channel PRB usage rate + (PRB usage rate of QCIx non-GBR service minimum guaranteed rate service * QCIx non-GBR service business number ( 5 (9 In another embodiment of the invention, the minimum guaranteed rate here may also be the same for different QCIs.
  • the priority bit rate PBR is defined for the uplink rate control of the non-GBR service, and the UE determines the priority of each RB (Radio Bearer, Radio Bearer) scheduling resource according to the PBR.
  • the load calculation of the non-GBR service may be performed according to the PBR.
  • a downlink PBR is also defined.
  • the same calculation as the minimum guaranteed rate may be used. The method only needs to replace the minimum guaranteed rate of the different QCI services with the PBR rate corresponding to the QCI service, and the specific calculation method is not described here.
  • FIG. 3 is a schematic flowchart of a method for determining resource usage and calculating a cell load by using a minimum number of service units according to another embodiment of the present invention.
  • a minimum service unit is defined.
  • a VOIP (Voice Over IP) service can be defined as a minimum service unit, or a signaling can be defined as a minimum service unit.
  • S302 Determine a load of a total number of minimum service units equal to all services in the cell as the cell load.
  • the ratio of the resources required for this type of service to the resources occupied by the minimum service unit is stored.
  • the number of minimum service units of the cell service is used. Calculation. For example, if the QCI 5 service is equated to the 5 minimum service units, then the load of a QCI 5 system is the load of the 5 smallest business units. Then the load of the cell is equal to the load of the total number of minimum service units equivalent to all services in the cell.
  • the actual occupied resources are basically the same as the resources occupied by the total number of minimum service units defined in the service attributes; for non-GBR services, the corresponding minimum number of service units is the minimum number of QoSs.
  • the method of using the minimum service unit can be used not only for the calculation of the air interface load, but also for the calculation of the hardware resource consumption of the eNB (evolved base station).
  • a scheme for calculating a cell load by using a minimum number of service units can improve a computing cell. The accuracy of the load.
  • the load of the system is measured in accordance with the resource (remaining capability) information that the cell can allocate.
  • the remaining capacity of the cell is the state of the new user resource that the cell can allocate.
  • the cell air interface load is calculated according to the QCI priority of the service type supported by the cell. Referring to FIG. 4, a flow chart of a method for calculating a cell load according to a QCI priority of a service according to another embodiment of the present invention is shown.
  • S401 Obtain information about service types supported by the cell.
  • the cell load balancing device may obtain the service type information supported by the cell from the eNB of the local cell.
  • S402 Calculate the load of the cell according to the QCI priority of the service type supported by the cell. Different services have different QCI levels, and different QCI levels have different priorities. When allocating resources, the network prioritizes services with higher priority QCI levels, that is, prioritizing resources for these services. When the resources of the cell are limited, the priority of the QCI level of the service that the cell can support is different, that is, the priority of the QCI level of the service that the cell can support reflects the resource status of the cell. Therefore, the load of the cell can be calculated according to the priority of the QCI level supported by the cell.
  • FIG. 5 is a schematic flowchart of a method for calculating a cell air interface load according to a cell performance parameter according to another embodiment of the present invention.
  • the cell load balancing device may The performance parameter of the current cell is obtained from the eNB of the local cell.
  • S502 Calculate load information of the local cell according to performance parameters of the current cell.
  • the load condition of the system will eventually be reflected in the performance of the system, so the load of the cell can be calculated based on the performance data of the cell.
  • the performance data that can be used here can include but is not limited to: QoS (Quality of Service) related data, such as: delay and BLER ( Block Error)
  • Ratio, block error rate, etc. performance statistics related data, such as: access success rate, dropped call rate, and handover success rate. For example, the QoS performance of the cell A is worse than that of the cell B, or when the access success rate of the cell A is lower than the cell B, the load of the cell A is higher than that of the cell 8.
  • the resource usage ratio can be used to indicate the load.
  • a transmission resource its resource usage can be described in terms of the ratio of bandwidth used to total bandwidth.
  • hardware resources it can be described according to the ratio of the hardware resource processing capability used to the total hardware resource processing capability of the system.
  • the state of a resource can include an overload state, a non-overload state.
  • the overload state can be expressed as: the resource load is heavy, for example, the resource load of the cell exceeds a preset threshold, and the cell cannot share the services of other cells at this time.
  • the non-overload state can be expressed as:
  • the resource load is light or normal.
  • the resource load of the cell is lower than the preset threshold. At this time, the cell can share the load of other cells.
  • the state of the resource may further include an overload state, a normal state, and a light load state.
  • the overload state can be expressed as: the resource load is heavy, for example, the resource load of the cell exceeds a preset threshold, for example, exceeds the highest value of the preset threshold, and the cell cannot share the traffic of any other cell at this time.
  • the normal state can be expressed as follows:
  • the resource load is normal.
  • the resource load of the cell is in a preset threshold interval, and the cell can share the services of other overloaded cells.
  • the light load state can be expressed as: the resource load is light, for example, the resource load of the cell is lower than a preset threshold, for example, the lowest value lower than the preset threshold, and the cell can share the services of any other cell.
  • the state of the resource may further include an overload state, a overload state, Normal state, light load state.
  • the overload state can be expressed as: the resource load is heavy, for example, the resource load of the cell exceeds a preset threshold, for example, exceeds the highest value of the preset threshold, and the shared service needs to be requested from other cells.
  • the reload status can be expressed as:
  • the resource load is heavy.
  • the resource load of the cell is in the preset threshold interval, and the services of any other cell cannot be shared.
  • the normal state can be expressed as follows:
  • the resource load is normal.
  • the resource load of the cell is in the preset threshold interval, but the services of any other cell, such as other overloaded and reloaded cells, can be shared.
  • the light load state can be expressed as: the resource load is light, for example, the resource load of the cell is lower than a preset threshold, for example, the lowest value lower than the preset threshold, and the services of any other cell can be shared.
  • each resource calculates its contribution to the integrated load according to a certain proportional coefficient, for example,
  • the combined load of the cell can be calculated by the following formula:
  • a method for exchanging information between eNBs is described to reduce traffic of information interaction and improve efficiency of information interaction.
  • the source eNB When the source cell load reaches a preset threshold, the source eNB (S_eNB) needs to know the load of the target eNB (T-eNB), and the preset threshold can be set by the OAM or set in the initial configuration, and the S-eNB The T-eNB sends a resource status request message, indicating in the message the manner and condition of the load shedding information on the target cell.
  • the interaction of the load information may be triggered when the integrated load of the cell reaches a preset threshold.
  • FIG. 6 is a schematic flowchart of a load information exchange process performed by an event triggering method according to another embodiment of the present invention.
  • the S-eNB sends a resource status request message to the T-eNB, where the message indicates that the T-eNB
  • the event triggering method reports the load information and indicates the event threshold
  • the T-eNB reports the load information to the S-eNB when the load change reaches the event trigger condition.
  • the S-eNB of the source cell when the S-eNB of the source cell sends a resource status request message, it indicates that the event is triggered in the upper mode and indicates the event threshold. After receiving the message, the T-eNB first reports the current load status information of the relevant cell. Then, according to the indicated event threshold, when the load change of the relevant cell meets the trigger condition of the event, the new load information of the relevant cell is reported. Give S-eNB.
  • FIG. 7 a flow chart of performing load information interaction in a combination of a use cycle and an event trigger is provided according to another embodiment of the present invention.
  • the S-eNB sends a resource status request message to the T-eNB, where the message indicates that the T-eNB reports the load information in a combination of a period and an event trigger, and indicates an event threshold.
  • the T-eNB reports the load information to the S-eNB when determining that the load change reaches the event trigger condition when the reporting period arrives.
  • the load information may include load information of the air interface, load information of the transmission resource, and load information of the hardware resource, or integrated load information.
  • the event triggering includes: when the load of the target cell changes exceeds a certain threshold, the trigger event is reported. .
  • the S-eNB of the source cell when the S-eNB of the source cell sends a resource status request message, it indicates that the period and the event are combined in the upper mode, and the event threshold is indicated. After receiving the message, the T-eNB first reports the current load status information of the relevant cell; when the next period comes, compares the current load status with the condition set by the event report, and if the condition is met, reports the load information to the source cell. Otherwise, it will not be reported.
  • the existing resource status request message needs to be modified as follows:
  • the Report Mode option is added to indicate the reporting mode of the T-eNB.
  • the Report Mode can include the combination of periodic reporting, event reporting, period, and event reporting.
  • FIG. 8 is a schematic flowchart of performing load information interaction without an X2 interface or an X2 interface being unavailable according to another embodiment of the present invention.
  • S801 The S_eNB sends a Resource status request message to the MME, and the MME forwards the resource status request message to the T-eNB.
  • the T_eNB sends a Resource status Rsp message to the MME, and the MME sends the resource status response message to the S-eNB.
  • the T_eNB sends a Resource status update message to the MME.
  • the MME sends this resource status update message to the S-eNB.
  • the S-eNB of the source cell when there is no X2 interface between the S-eNB and the T-eNB, or the X2 interface is unavailable, the S-eNB of the source cell sends the resource status request information to the connected MME through the S1 interface.
  • the resource status request information may be in the following two manners.
  • the MME transparently transmits the resource status request message to the T-eNB;
  • the MME learns the identifier of the T-eNB according to the Global Cell ID information in the resource status request message, and forwards the resource status request message to the T-eNB according to the T-eNB identifier.
  • the MME may forward the resource status request message to the T-eNB in the following situations. 1) If the T-eNB and the MME have an S1 connection, the MME directly forwards the resource status request message to the T-eNB in the following situations. 1) If the T-eNB and the MME have an S1 connection, the MME directly forwards the resource status request message to the T-eNB in the following situations. 1) If the T-eNB and the MME have an S1 connection, the MME directly forwards the resource status request message to the T-eNB in the following situations. 1) If the T-eNB and the MME have an S1 connection, the MME directly forwards the resource status request message to the T-eNB in the following situations. 1) If the T-eNB and the MME have an S1 connection, the MME directly forwards the resource status request message to the T-eNB in the following situations. 1) If the T-eNB and the MME have an S1 connection, the MME directly forwards the resource status request message to the T-eNB in the following situations
  • the MME searches for the MME to which the T-eNB is connected according to the T-eNB identity, and forwards the resource status request message to the T-eNB through the S3 interface between the MMEs.
  • the MME forwards the resource status request message to the T-eNB by the target MME.
  • the S-eNB of the source cell when the S-eNB is to acquire the load information of the different system cell, the S-eNB of the source cell sends the resource status request information to the connected MME through the S1 interface. Adding a target node identifier in the resource status request message, where the target node identifier includes an RNC (Radio Network Controller) and a BSC (Base Station Controller) identifier or a target cell identifier, and the MME sends the resource status after receiving the resource status request message.
  • the request message is forwarded to the heterogeneous system core network node, for example, the core network node includes an SGSN (Serving GPRS Support Node) and the like.
  • the core network node of the target system searches for the corresponding target node according to the target node identifier in the resource status request message, and the target node sends the S-eNB interaction load information according to the condition in the resource status request message.
  • the process may be as shown in FIG. 9. Shown.
  • a core network node is passed between different wireless nodes according to another embodiment of the present invention.
  • the resource status request message sent by the S-eNB passes through the MME, and the first core network node to which the target node belongs reaches the target node;
  • the resource status response message sent by the target node passes through the first core network node and the MME to the S-eNB;
  • the source network node when the source network node is to acquire the load information of the neighboring node cell, the source network node sends the resource status query message of the neighboring node cell to the EMS (the element management system) to which the node belongs.
  • the EMS queries the target network node in the network node managed by the EMS according to the identifier information of the target network node; or queries the EMS to which the target network node belongs through the horizontal interface between the EMSs; or
  • the NMS Network Management System
  • the source EMS, the target EMS, or the NMS returns the load information of the target network node cell to the source network node after receiving the resource status query message.
  • the process of load balancing decision making in a small interval can be as follows.
  • the S-eNB in the source cell After obtaining the load information of the neighboring cell, the S-eNB in the source cell makes a decision according to the following principles:
  • the selection of the load balancing object ie, the neighboring cell:
  • the S-eNB in the source cell obtains the load balancing object by collecting the performance parameters of the source cell and the neighboring cell, that is, the candidate target cell set, where the performance parameters include the source cell and the target cell.
  • the load balancing means that the load-lighter cell shares the service of the partially-loaded heavy cell by the preset measures, and the preset measures include the handover caused by modifying the mobility parameter and the handover triggered by the network. For example, when the difference between the load of the local cell and the load of the candidate target cell exceeds a preset threshold, the candidate target cell is confirmed as the target cell for performing mobility parameter modification.
  • the process of modifying the mobility parameters in the small interval can be as follows.
  • FIG. 10 a flow chart of a mobility parameter modification between cells is shown in another embodiment of the present invention.
  • the S-eNB sends a parameter modification request message to the target node according to the result of the load balancing policy.
  • the path of the parameter tampering request message may be an X2 interface or an S1 interface in the LTE, or may be different. The interface between the systems.
  • the target node After receiving the parameter modification request message, the target node locally determines whether local parameter modification can be performed according to the content in the request message.
  • the S-eNB receives the parameter modification response message returned by the target node, and if it is a parameter modification response that is successfully modified, the local parameter is also modified according to the content of the request; if the parameter modification response fails to be modified, the current modification is abandoned, or according to Returns the reason value to initiate a new parameter modification request.
  • Another embodiment of the present invention further provides a cell load balancing apparatus, which may be a functional entity located inside an eNB, or may be an eNB itself, or may be a functional entity independent of an eNB, and may be implemented by software, hardware, or software. Hardware combination is implemented.
  • a cell load balancing apparatus which may be a functional entity located inside an eNB, or may be an eNB itself, or may be a functional entity independent of an eNB, and may be implemented by software, hardware, or software. Hardware combination is implemented.
  • the cell load balancing device may include:
  • the load information obtaining unit 1101 is configured to acquire load information of the local cell, and acquire load information of the neighboring cell according to the load information of the current cell.
  • the sending unit 1102 is configured to determine, according to the load information of the local cell acquired by the load information acquiring unit 1101 and the load information of the neighboring cell, whether the mobility parameter needs to be modified, and when determining that the mobility parameter needs to be modified, to the neighboring cell Send a parameter modification request message.
  • the equalizing unit 1103 is configured to perform a corresponding operation on the information that the parameter modification of the neighboring cell feedback received by the root root is successful. For example, if the equalization unit 1103 receives the parameter modification response that the modification succeeds, the local parameter is also modified according to the request content; if the equalization unit 1103 receives the parameter modification response that fails to be modified, the current modification is abandoned, or according to the reason of the return The value initiates a new parameter modification request.
  • the load information acquiring unit 1101 is configured to acquire load information of the local cell, where the load information of the local cell includes an air interface resource, a hardware resource, and a transmission resource.
  • the load information acquisition unit 1101 is configured to acquire load information of the neighboring cell when the air interface resource, or the hardware resource, or the load of the transmission resource exceeds the first preset threshold.
  • the load information acquiring unit 1101 is configured to acquire load information of the neighboring cell according to the integrated load of the cell, for example, a product for calculating a load of the cell equal to a load of the air interface resource and an air interface resource coefficient, and a transmission resource load and a transmission resource coefficient.
  • the product, and the sum of the product of the hardware resource load and the hardware resource coefficient, when the load of the cell exceeds the second preset threshold acquires load information of the neighboring cell.
  • the sending unit 1102 is further configured to send, to the neighboring cell, a resource status request message that includes an indication parameter, where the indication parameter is used to indicate that the neighboring cell reports the load information in an event trigger manner, or indicates that the neighboring cell triggers the combination by a period and an event.
  • the method reports the load information.
  • the sending unit 1102 directly sends a resource status request message to the node to which the neighboring cell belongs, and if there is no interface or the interface is unavailable, the core network belongs to the cell to which the cell belongs.
  • the node or the EMS or the NMS sends a resource status request message, and the core network node or the EMS or the NMS forwards the resource status request message to the node to which the neighboring cell belongs.
  • Another embodiment of the present invention further provides a cell load measurement apparatus, which may be a functional entity located inside an eNB, or may be an eNB itself, or a functional entity independent of the eNB, and may be implemented by software, hardware, or hardware and software. Combined way to achieve.
  • a cell load measurement apparatus which may be a functional entity located inside an eNB, or may be an eNB itself, or a functional entity independent of the eNB, and may be implemented by software, hardware, or hardware and software. Combined way to achieve.
  • the cell load measuring device may include:
  • the usage status obtaining unit 1201 is configured to identify the priority of the QCI according to the resource usage of the cell, or the remaining resources of the air interface of the cell, or the quality of service level of the service type supported by the cell, or obtain the resource of the cell by using the performance parameter of the cell. load.
  • the usage status obtaining unit 1201 includes a PRB usage rate calculation unit 12011 for performing physical resource unit PRB usage rate of the non-guaranteed bit rate GBR service. Processing, and calculating a resource load of the cell, for example, a resource load of the cell, where the resource load of the cell is a PRB usage rate of the processed non-GBR service, a PRB usage rate of the GBR service, a PRB usage rate of the signaling bearer, and a public The sum of the PRB usage of the channel.
  • the usage status obtaining unit 1201 includes a minimum service unit calculating unit 12012, configured to set a minimum service unit, and calculate a resource load of the cell, such as a resource load of the local cell, where the cell
  • the resource load is the total number of minimum service units equivalent to all services in the cell.
  • the minimum service unit calculation unit 12012 is configured to determine that the priority bit rate that satisfies the service quality QoE is the minimum guaranteed rate, and determine that the uplink priority bit rate PBR of the UE uplink rate control process is the PBR of the different quality of service level identification QCI, and The minimum guaranteed rate or PBR processes the PRB usage rate of the non-GBR service.
  • the embodiment of the present invention further provides a system for cell load balancing, including: a first cell node, a second cell node, and a cell load balancing device; wherein, the first cell node and the second cell node are respectively located Two cells adjacent to each other, the first cell node and the cell load balancing device are located in the same cell;
  • the cell load balancing device is configured to acquire load information of the current cell from the first cell node, and acquire load information of the neighboring cell from the second cell node; according to the acquired load information of the local cell and the neighboring cell When the load information determines that the mobility parameter needs to be modified, sending a parameter modification request to the second cell node;
  • the second cell node modifies the mobility parameter of the local cell, and feeds back to the cell load balancing device whether the parameter modification is successful;
  • the cell load balancing device is configured to modify the mobility parameter of the local cell according to the information of whether the parameter fed back by the second cell node is modified.
  • the cell load balancing device is further configured to acquire, from the first cell node, an air interface resource load of the local cell, or a hardware resource load, or a transmission resource load, according to an air interface resource load of the current cell, or a hardware resource load, or a transmission resource. Load, obtain information of neighboring cells; or, The cell load balancing device is further configured to acquire a comprehensive load of the current cell from the first cell node, and obtain load information of the neighboring cell according to the integrated load of the current cell, where the integrated load of the local cell is based on the air interface of the local cell. Resource load, as well as hardware resource load, and transmission resource load acquisition.
  • the cell load balancing apparatus is further configured to: acquire a set of candidate target cells according to a handover-related performance parameter between the local cell and the neighboring cell, and confirm, when the difference between the candidate target cell load and the local cell load exceeds a preset threshold,
  • the candidate target cell is a target cell that needs to modify the mobility parameter, and sends a parameter modification request message to the second cell node.
  • the load information acquiring unit is further configured to send a resource status request message to the second cell node, and is further configured to receive load information sent by the second cell node;
  • the resource status message carries an indication parameter, where the indication parameter is used to indicate that the neighboring cell reports the load information when the event threshold is met, or is used to indicate that the neighboring cell reports the load information when the reporting period arrives and the event threshold is met.
  • the solution provided by the embodiment of the present invention can make up for the defects of the current standard, calculate the load of the cell more accurately, improve the process of the load information interaction and the process of parameter modification, so that the LB solution can be better implemented in the network, and then It can increase the capacity of the network, improve the success rate of user access, and reduce the access delay.
  • the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium, including a plurality of instructions for causing a A computer device (which may be a personal computer, server, or network device, etc.) performs all or part of the steps of the methods described in various embodiments of the present invention.
  • the foregoing storage medium includes: a medium that can store program codes, such as a USB flash drive, a removable hard disk, a read only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk.
  • the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, ie may be located A place, or it can be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the objectives of the solution of the embodiment. Those of ordinary skill in the art can understand and implement without any creative effort.
  • the described systems, apparatus, and methods, and the schematic diagrams of various embodiments may be combined or integrated with other systems, modules, techniques or methods without departing from the scope of the present application.
  • the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be electrical, mechanical or otherwise.

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Description

小区负荷均衡方法、 小区负荷测量方法及装置 本申请要求于 2008 年 9 月 24 日提交中国专利局、 申请号为 200810161540.2、 发明名称为"小区负荷均衡方法、 小区负荷评估方法及装置" 的中国专利申请的优先权, 其全部内容通过引用结合在本申请中。 技术领域
本发明涉及移动通信技术领域, 尤其涉及一种小区负荷均衡方法、 小区负 荷测量方法及装置。 背景技术
随着无线通信技术的发展, 用户对于无线业务的需求越来越高, 为了满足 业务传输速率更快、 时延更短、 频带更宽的需求, LTE ( Long Term Evolution, 长期演进)技术应运而生。
LTE作为 3G ( Third Generation, 第三代移动通信)技术的演进, 它改进 并增强了 3G的空中接入技术, 随着 LTE网络的布置, 未来的网络运营环境越 来越复杂, 降低建网价格关键因素是提高频谱利用率、 简化网络结构、 提供更 低成本的无线基站以及增强可维护性功能等。
SON ( Self-organizing Network, 自组织网络)作为一种能够提高网络自动 化水平和系统效率, 减少运营成本的技术, 具有以下特点: 高度智能化、 网络 具有良好的重构性、 可伸缩性、 自组织性, 用以满足不同环境、 不同客户的通 信需求, 是一个高度自治、 自适应的网络。
LB ( Load Balancing, 负荷均衡)作为 SON网络的一个重要特征, 要求 做到业务负荷在不同网络之间的均衡分布, 进而提高网络的容量, 提高用户接 入的成功率, 减少接入时延。 发明内容
本发明要提供一种小区负荷均衡方法、 小区负荷测量方法及装置, 以保证 业务负荷的均衡分布, 进而提高网络的通信质量。 为此, 本发明实施例釆用如下技术方案。
一种小区负荷均衡方法, 该方法包括:
获取本小区以及邻接小区的负荷信息;
根据本小区的负荷信息以及所述邻接小区的负荷信息确定需要修改移动 性参数的目标小区;
向确定的目标小区发送参数修改请求;
根据所述邻接小区反馈的参数修改是否成功的信息执行相应操作。
一种小区负荷测量方法, 包括:
根据小区的资源使用量, 或者, 小区的空口剩余资源, 或者, 小区支持的 业务类型的服务质量级别标识 QCI的优先级, 或者, 小区的性能参数获取小 区的资源负荷。
一种用于小区负荷均衡的装置, 包括:
负荷信息获取单元, 用于获取本小区以及邻接小区的负荷信息;
发送单元,用于当根据所述负荷信息单元获取的本小区的负荷信息以及邻 接小区的负荷信息确定需要修改移动性参数时,向所述邻接小区发送参数修改 请求;
均衡单元,用于根据接收到的所述邻接小区反馈的参数修改是否成功的信 息执行相应操作。
一种小区负荷测量装置, 包括:
使用状况获取单元, 用于根据小区的资源使用量, 或者, 小区的空口剩余 资源, 或者, 小区支持的业务类型的服务质量级别标识 QCI的优先级, 或者, 小区的性能参数获取小区的资源负荷。
一种用于小区负荷均衡的系统, 包括: 第一小区节点、 第二小区节点和小 区负荷均衡装置; 其中, 所述第一小区节点与所述第二小区节点分别位于相互 邻接的两个小区, 所述第一小区节点与所述小区负荷均衡装置位于相同小区; 所述小区负荷均衡装置, 用于从所述第一小区节点获取本小区的负荷信 息, 以及从所述第二小区节点获取邻接小区的负荷信息; 根据所获取的本小区 的负荷信息以及邻接小区的负荷信息确定需要修改移动性参数时,向所述第二 小区节点发送参数修改请求; 所述第二小区节点,根据所述小区负荷均衡装置发送的参数修改请求,对 本地小区的移动性参数进行修改,并向所述小区负荷均衡装置反馈参数修改是 否成功的信息;
所述小区负荷均衡装置,用于根据所述第二小区节点反馈的参数修改是否 成功的信息, 对本地小区的移动性参数进行修改。
釆用本发明实施例, 可弥补目前标准的缺陷, 完善负荷信息交互的流程和 参数修改的流程, 从而可更好地在网络中实现 LB方案, 继而可以提高网络的 通信质量。 附图说明
图 1为本发明一实施例的一种小区负荷均衡的方法流程示意图; 图 2为本发明另一实施例的一种根据 PRB使用率计算小区空口负荷的方 法流程示意图;
图 3 为本发明另一实施例的一种根据最小业务单元数量计算小区空口负 荷的方法流程示意图;
图 4为本发明另一实施例的一种根据业务的 QCI优先级计算小区空口负 荷的方法流程示意图;
图 5 为本发明另一实施例的一种根据小区性能参数计算小区空口负荷的 方法流程示意图;
图 6 为本发明另一实施例的一种釆用事件触发方式进行负荷信息交互的 流程示意图;
图 7 为本发明另一实施例的一种釆用周期和事件触发集合的方式进行负 荷信息交互的流程示意图;
图 8为本发明另一实施例的一种通过 MME进行负荷信息交互的流程示意 图;
图 9 为本发明另一实施例的一种通过其他网络节点进行负荷信息交互的 流程示意图;
图 10为本发明另一实施例的一种在负荷信息交互过程中修改相关移动性 参数的方法流程示意图; 图 11为本发明另一实施例的一种小区负荷均衡装置结构示意图; 图 12为本发明另一实施例的一种小区负荷测量装置结构示意图。 具体实施方式
参见图 1 , 为本发明一实施例的一种小区负荷均衡的方法流程示意图, 可 以包括如下步骤。
S101 : 获取邻接小区的负荷信息。
例如, 由一种小区负荷均衡装置获取邻接小区的负荷信息, 该装置可以是 位于 eNB ( evolved Node B, 演进型基站) 内部的功能实体, 也可以是 eNB本 身,也可以是独立于 eNB的实体。该小区负荷均衡装置可以从邻接小区的 eNB 中获取邻接小区的负荷信息。
S102: 根据本小区的负荷信息以及所述邻接小区的负荷信息,确定需要修 改移动性参数, 向所述邻接小区发送参数修改请求消息;
S103: 根据所述邻接小区针对所述参数修改请求反馈的信息执行相应操 作。
其中的移动性参数包括但不限于小区切换参数和 /或小区重选参数。
在本发明的另一实施例中,所述小区负荷均衡装置在获取邻接小区的负荷 信息的任意时刻, 例如之前, 之后或同时, 还获取本小区的资源使用状况; 根 据所述本小区的资源使用状况计算本小区的负荷。
釆用本发明实施例提供的方法, 可实现 SON网络中的 LB方案, 继而可 以提高网络的容量, 提高用户接入的成功率, 减少接入时延。
下面从负荷计算、负荷信息交互以及移动性参数修改三部分对本发明实施 例进行详细介绍。 小区负荷计算
在本发明实施例中, 资源使用状况包括空口资源、传输资源和硬件资源等 的使用状况。 其中, 空口资源使用状况可以通过 PRB ( Physical resource block, 物理资源单元)使用率或最小业务单元数量来表示; 传输资源使用状况可以通 过带宽使用率或者传输资源使用状态来表示;硬件资源使用状况可以通过硬件 资源处理能力使用率或者硬件资源使用状态来表示。
例如, 由一种小区负荷测量装置对小区负荷进行计算, 该装置可以是位于 eNB内部的功能实体, 也可以是 eNB本身, 也可以是独立于 eNB的实体。
如下介绍根据空口资源使用量计算小区空口资源负荷的几种情况。
第一, 按照 PRB使用率计算小区空口负荷
小区负荷的估算, 可以分为如下四个部分:
1 ) GBR ( Guaranteed Bit Rate, 保证比特率)业务的负荷;
2 ) 非 GBR业务的负荷;
3 ) 信令承载的负荷;
4 ) 公共信道的负荷。
由于 GBR业务、信令承载和公共信道必须满足保证速率,其速率是相对固 定的, 其所占的 PRB也是相对固定的, 因此, 在计算小区负荷时, 对于这些业 务来说, 可以直接用 PRB使用率来描述其对于系统负荷的贡献。
对于非 GBR业务, 其速率是变化的, 并且在某些时刻是可以降为 0的, 因 此在计算小区负荷时, 不能直接用 PRB使用率来描述其对于系统负荷的贡献。 需要对非 GBR业务的 PRB使用率进行处理后才能用于描述其对系统负荷的贡 献。
因此, 小区的负荷包括经过处理的非 GBR业务的 PRB使用率、 GBR业 务的 PRB使用率、 信令承载的 PRB使用率、 公共信道的 PRB使用率。
参见图 2, 为本发明另一实施例的一种根据 PRB使用率计算小区空口负 荷的方法流程示意图。
S201 : 分别获取 GBR业务、非 GBR业务、信令承载以及公共信道的 PRB 使用率;
例如, 当小区负荷均衡装置为独立于 eNB的实体时, 小区负荷均衡装置 可以从本小区的 eNB获取上述信息。
S202: 对非 GBR业务的 PRB使用率进行处理;
S203: 确定小区的负荷。
例如, 对非 GBR业务的 PRB使用率的处理, 可以按照下面三种方法之一来 进行。
1、 不计算非 GBR业务对系统负荷的影响
由于非 GBR业务的速率是可变的, 也就是说, 在系统资源紧张的情况下, 非 GBR所占用的资源是可以分配给其他高优先级业务的, 在某些情况下, 非 GBR业务所占用的 PRB资源可以为 0, 此时, 小区的负荷可以通过如下公式计 算:
小区的负荷 = GBR业务 PRB使用率 +信令承载 PRB使用率 +公共信道 PRB使用率 ( 1 )
2、 按照最小保证速率来计算非 GBR业务的负荷
对非 GBR业务,按照不同的 QCI ( QoS Class Identifier,服务质量级别标识) 优先级分别定义一个最小保证速率,这里的最小保证速率为满足业务质量 QoE (Quality of Experience)的最小速率。对于不同的非 GBR业务来说,其对应的 QCI 是不同的, 可以参照每个 QCI业务 QoS的要求来定义该 QCI对应业务的最小保 证速率。 比如, 可以定义 QCI为 5的非 GBR业务的最小保证速率为 20K, QCI为 6的非 GBR业务的最小保证速率为 15K, QCI为 7的非 GBR业务的最小保证速率 为 10K, QCI为 8的非 GBR业务的最小保证速率为 5K, QCI为 9的非 GBR业务的 最小保证速率为 2K。
1 )非 GBR业务的负荷比例因子可以通过如下公式计算:
非 GBR业务的负荷比例因子 =最小保证速率 /平均速率 ( 2 ) 此时对于非 GBR业务的 PRB使用率的处理为, 通过如下公式进行计算, 得 到非 GBR业务的负荷:
非 GBR业务的负荷 =非 GBR业务的 PRB使用率 *非 GBR业务的负荷比例因 子 (3 ) 该方法中的最小保证速率和平均速率可以是非 GBR业务中不同 QCI业务 的最小保证速率和平均速率, 或者是非 GBR业务的最小保证速率和平均速率。
那么, 通过如下公式进行计算, 可以得到小区的负荷:
小区的负荷 = GBR业务 PRB使用率 +信令承载 PRB使用率 +公共信道 PRB使用率 + (QCIx业务的 PRB使用率 *QCIx的负荷比例因子) ( 4 ) 在本发明 另一实施例中, 小区的负荷还可以通过另一公式得到: 小区的负荷= GBR业务 PRB使用率 +信令承载 PRB使用率 +公共信道 PRB 使用率 +非 GBR业务 PRB使用率 *负荷比例因子 ( 5 )
2 ) 利用非 GBR业务中最小保证速率的业务的 PRB使用率来计算非 GBR业 务对小区负荷的贡献,该最小保证速率可以是非 GBR业务的最小保证速率,则 此时对于非 GBR业务的 PRB使用率的处理为, 通过如下公式进行计算, 得到非 GBR业务的负荷:
非 GBR业务的负荷 =非 GBR业务的最小保证速率业务的 PRB使用率 *非 GBR业务的业务数 ( 6 ) 在本发明的另一实施例中, 最小保证速率是不同 QCI业务的最小保证速 率, 则预置系数是各 QCI业务的业务数, 则对于非 GBR业务的 PRB使用率的处 理为, 通过如下公式进行计算, 得到非 GBR业务的负荷:
非 GBR业务的负荷 = ( QCIx的非 GBR业务的最小保证速率业务的 PRB使用率 *QCIx的非 GBR业务的业务数 Γ ( 7 ) 那么, 通过如下公式进行计算, 可以得到小区的负荷:
小区负荷 = GBR业务 PRB使用率 +信令承载 PRB使用率 +公共信道 PRB 使用率 +非 GBR业务的最小保证速率业务的 PRB使用率 *非 GBR业务的业务数
( 8 ) 在本发明的另一实施例中,还可以通过如下另一公式进行计算,得到小区 的负荷:
小区负荷=081业务 PRB使用率 +信令承载 PRB使用率 +公共信道 PRB使 用率 + ( QCIx的非 GBR业务的最小保证速率业务的 PRB使用率 *QCIx的非 GBR业务的 业务数 Γ5 ( 9 ) 在本发明的另一实施例中, 对于不同的 QCI, 这里的最小保证速率也可以 相同。
3、 参照 PBR ( prioritized bit rate, 优先比特速率)来计算非 GBR业务的负 荷
在目前的 3GPP协议中, 针对于非 GBR业务的上行速率控制, 定义了优先 比特速率 PBR, UE根据 PBR来确定对各个 RB ( Radio Bearer, 无线承载)调度 资源的优先级。 本发明实施例中, 可以根据 PBR对非 GBR业务进行负荷计算, 参照上行 PBR的定义, 同样定义一个下行的 PBR, 在计算非 GBR业务的负荷时, 可以使 用同上述根据最小保证速率计算类似的方法, 仅需将不同 QCI业务的最小保证 速率替换为该 QCI业务对应的 PBR速率进行计算即可, 具体的计算方法在此不 再赘述。
本发明实施例提供的各种根据 PRB使用率计算小区负荷的方案, 其中最 为重要的是对非 GBR业务的 PRB使用率提供一个合理的计算,从而保证获取 合理的总 PRB使用率, 最终准确计算小区负荷。 第二, 按照最小业务单元数量计算小区空口负荷
参见图 3 , 为本发明另一实施例的一种通过最小业务单元数量确定资源使 用量、 计算小区负荷的方法流程示意图。
S301 : 设定最小业务单元;
在系统中, 定义一个最小业务单元, 比如, 在 LTE中可以定义一个 VOIP ( Voice Over IP, IP上的语音)业务为一个最小业务单元, 或者可以定义一个 信令为最小业务单元。
S302:将小区内所有业务所等同的最小业务单元的总数的负荷确定为所述 小区负荷。
例如, 对于不同的业务类型, 在其业务属性中, 保存有此类型业务所需 资源与最小业务单元所占用的资源的比例关系,在计算小区负荷时,按照小区 业务的最小业务单元数来进行计算。 比如将 QCI为 5的业务等同于 5个最小业务 单元, 则一个 QCI为 5的业务对系统的负荷为 5个最小业务单元的负荷。 那么小 区的负荷等于小区内所有业务所等同的最小业务单元的总数的负荷。
对于 GBR业务, 其实际所占资源与业务属性中所定义的最小业务单元总 数所占用的资源基本一致;对于非 GBR业务,所对应的最小业务单元数目为满 足 QoS的最小数目。
本实施例中, 釆用最小业务单元的方法, 不仅仅可以用于空口负荷的计 算, 还可以用于 eNB (演进型基站)硬件资源消耗的计算。
本实施例通过最小业务单元数量计算小区负荷的方案, 可提高计算小区 负荷的准确度。
在本发明的另一实施例中, 按照小区可分配的资源(剩余能力)信息测量 系统的负荷。
不同的小区具有不同的容量,仅仅以资源占用情况, 不能反映小区的剩余 能力, 即小区还可以提供的资源状况。 因此在新用户接入时, 还需要考虑小区 的剩余能力信息。 小区的剩余能力即小区可以分配的给新用户资源状况。
由于非 GBR业务的速率是可变的, 也就是说其所占的资源在某些情况下 可以分配给其他业务, 因此对于小区剩余能力的计算, 是以小区空闲资源, 加 上已分配给非 GBR业务的资源中,在满足当前业务 QoE的情况下可以用来分 配给其他用户的资源。 这里的 QoE的可以参照前面所属的最小保证速率来描 述。 第三, 根据小区所支持的业务类型的 QCI优先级计算小区空口负荷 参见图 4,为本发明另一实施例的一种根据业务的 QCI优先级计算小区负 荷的方法流程示意图。
S401 : 获取本小区所支持的业务类型信息;
例如, 当小区负荷均衡装置为独立于 eNB的实体时, 小区负荷均衡装置 可以从本小区的 eNB获取本小区所支持的业务类型信息。
S402: 根据本小区所支持的业务类型的 QCI优先级计算小区的负荷。 不同的业务具有不同的 QCI等级, 不同的 QCI等级具有不同的优先级。 网 络在分配资源时, 优先考虑具有较高优先级的 QCI等级的业务, 即优先分配资 源给这些业务。 当小区的资源受限时, 小区所能支持的业务的 QCI等级的优先 级是不同的, 也就是说, 小区所能支持的业务的 QCI等级的优先级反映了该小 区的资源状况。 因此, 可以按照小区所支持的 QCI等级的优先级来计算小区的 负荷。
参见图 5 , 为本发明另一实施例的一种根据小区性能参数计算小区空口负 荷的方法流程示意图。
S501 : 获取本小区的性能参数;
例如, 当小区负荷均衡装置为独立于 eNB的实体时, 小区负荷均衡装置可 以从本小区的 eNB获取本小区的性能参数。
S502: 才艮据本小区的性能参数计算本小区的负荷信息。
系统的负荷状况, 最终将反映到系统的性能上, 因此可以基于小区的性能 数据来计算小区的负荷。 这里可使用的性能数据可以包括但不限于: QoS ( Quality of Service, 服务质量)相关数据, 比如: 时延和 BLER ( Block Error
Ratio, 误块率)等; 性能统计相关数据, 比如: 接入成功率、 掉话率和切换 成功率等。 例如小区 A的 QoS性能比小区 B差, 或者当小区 A的接入成功率低于 小区 B时, 则小区 A的负荷高于小区8。
对于传输资源和硬件资源来说, 负荷的描述可以通过如下两种方法。
1 )对于硬件资源和传输资源, 可以分别利用其资源使用比例来指示负荷。 例如,对于传输资源, 可以根据所使用的带宽占总带宽的比例来描述其资 源使用情况。对于硬件资源, 可以根据所使用的硬件资源处理能力占系统总的 硬件资源处理能力的比例来描述。
2 )对于传输资源和硬件资源, 由于其一般不是系统性能的瓶颈, 因此可 以仅考虑这两种资源的状态。
例如, 资源的状态可以包括过载状态、 非过载状态。
过载状态可以表示为:资源负荷较重,例如小区的资源负荷超过预置门限, 此时小区不能分担其他小区的业务。
非过载状态可以表示为: 资源负荷较轻或者正常, 例如小区的资源负荷低 于预置门限, 此时小区可以分担其他小区的负荷。
在本发明的另一实施例中, 资源的状态还可以包括过载状态、 正常状态、 轻载状态。
过载状态可以表示为:资源负荷很重,例如小区的资源负荷超过预置门限, 例如超过预置门限的最高值, 此时小区不能分担其他任何小区的业务。
正常状态可以表示为: 资源负荷正常, 例如小区的资源负荷位于预置门限 区间内, 小区可以分担其他过载小区的业务。
轻载状态可以表示为:资源负荷较轻,例如小区的资源负荷低于预置门限, 例如低于预置门限的最低值, 小区可以分担其他任何小区的业务。
在本发明的另一实施例中, 资源的状态还可以包括过载状态、 重载状态、 正常状态、 轻载状态。
过载状态可以表示为:资源负荷很重,例如小区的资源负荷超过预置门限, 例如超过预置门限的最高值, 需要向其他小区请求分担业务。
重载状态可以表示为: 资源负荷较重, 例如小区的资源负荷位于预置门限 区间内, 不能分担其他任何小区的业务。
正常状态可以表示为: 资源负荷正常, 例如小区的资源负荷位于预置门限 区间内, 但可以分担其他任何小区的业务, 例如其他过载和重载小区的业务。
轻载状态可以表示为:资源负荷较轻,例如小区的资源负荷低于预置门限, 例如低于预置门限的最低值, 可以分担其他任何小区的业务。
综上所述, 对于三种资源的负荷的考虑: 分别考虑小区的空口资源、 传输 资源、 硬件资源的负荷状况。 将小区的空口资源、 传输资源、 硬件资源等负荷 作为一个整体, 考虑小区的综合负荷, 在计算小区的综合负荷时, 每一种资源 根据一定的比例系数计算其对综合负荷的贡献, 例如, 可以通过如下公式计算 小区的综合负荷:
小区的综合负荷 =空口资源的负荷 *空口资源系数 +传输资源负荷 *传输 资源系数 +硬件资源负荷 *硬件资源系数 ( 10 ) 小区间负荷信息交互
在本发明的另一实施例中, 描述了一种 eNB之间交互信息的方法, 以减少 信息交互的流量, 提高信息交互的效率。
当源小区负荷达到预设阔值时,源 eNB( S_eNB )需要知道目标 eNB(T— eNB) 的负荷,该预设阔值可以由 OAM下发或者在初始配置时设定, S— eNB向 T— eNB 发送 resource status request (资源状态请求 )消息, 在消息中指示目标小区上才艮 负荷信息的方式和条件。 这里可以是当任何一种资源的负荷达到预设阔值时, 也可以是小区的综合负荷达到预设阔值时, 触发负荷信息的交互。
1 )基于事件的上报
参见图 6 , 为本发明另一实施例的一种釆用事件触发方式进行负荷信息交 互过程的流程示意图。
S601 : S— eNB向 T— eNB发送资源状态请求消息, 所述消息中指示 T— eNB以 事件触发方式上报负荷信息, 并指示事件门限;
S602: 所述 T— eNB在负荷变化达到事件触发条件时, 向 S— eNB上报负荷信 息。
例如, 源小区的 S— eNB在发送资源状态请求消息时, 在上 模式中指示以 事件触发方式进行上报, 并指示事件门限。 T— eNB在收到此消息之后, 首先报 告相关小区的当前负荷状态信息; 然后才艮据所指示的事件门限, 当相关小区的 负荷变化满足事件的触发条件时, 上报相关小区新的负荷信息给 S— eNB。
2 )基于周期和事件结合的上报
参见图 7 , 为本发明另一实施例的一种釆用周期和事件触发结合的方式进 行负荷信息交互的流程示意图。
S701 : 所述 S— eNB向 T— eNB发送资源状态请求消息, 所述消息中指示 T— eNB以周期和事件触发结合的方式上报负荷信息, 并指示事件门限;
S702: 所述 T— eNB在上报周期到达时, 在确定负荷变化达到事件触发条件 时, 向 S— eNB上报负荷信息。
例如, 所述负荷信息可以包括空口的负荷信息,传输资源的负荷信息以及 硬件资源的负荷信息, 或者综合负荷信息; 所述的事件触发包括当目标小区的 负荷变化超过一定门限时, 触发事件上报。
例如, 源小区的 S— eNB在发送资源状态请求消息时, 在上 模式中指示以 周期和事件结合的方式进行上报,并指示事件门限。 T— eNB在收到此消息之后, 首先报告相关小区的当前负荷状态信息; 在下一个周期到来时, 比较当前负荷 状态与事件报告所设置的条件, 如果满足条件, 则将负荷信息报告给源小区, 否则不报告。
根据上面的方法, 对于现有的资源状态请求消息需要作如下的修改:
①增加 Report Mode(报告模式)选项,用以指示 T— eNB的上报方式, Report Mode可以包括周期上报、 事件上报、 周期和事件结合上报的方式。
②可选的, 增加 Event Threshold (事件门限), 当 Report Mode为事件上报 或者周期和事件结合上报时, 该值有效, 该值缺省值可以为 0。
参见图 8 ,为本发明另一实施例的一种在没有 X2接口或者 X2接口不可用的 情况下, 进行负荷信息交互的流程示意图。 S801 : S_eNB向 MME发送 Resource status request (资源状态请求) 消息, MME将此资源状态请求消息转发给 T— eNB;
S802: T_eNB将 Resource status Rsp (资源状态响应) 消息发送给 MME, MME将此资源状态响应消息发送给 S— eNB;
S803: T_eNB将 Resource status update (资源状态更新)消息发送给 MME,
MME将此资源状态更新消息发送给 S— eNB。
本实施例中, 当 S— eNB与 T— eNB之间没有 X2接口或者 X2接口不可用时, 源小区的 S— eNB通过 S1接口向所连接的 MME发送上述资源状态请求信息。
其中, 资源状态请求信息可以有如下两种方式。
1) 例如, 在资源状态请求消息中增加 T— eNB标识, MME在接收到此资 源状态请求消息之后, 将该资源状态请求消息透传给 T— eNB;
2) 例如, MME根据资源状态请求消息中的 Global Cell ID信息, 获知 T— eNB的标识, 根据 T— eNB标识转发此资源状态请求消息给 T— eNB。
例如, MME转发此资源状态请求消息给 T— eNB可以有如下几种情况。 1) T— eNB与 MME有 S1连接, 则 MME直接转发该资源状态请求消息给
T— eNB;
2) T— eNB与 MME没有 SI连接, 则该 MME根据 T— eNB标识, 查找 T— eNB所 连接的 MME, 通过 MME之间的 S3接口, 将此资源状态请求消息转发给 T— eNB 所连接的 MME, 由目标 MME将此资源状态请求消息转发给 T— eNB。
在本发明的另一实施例中, 当 S— eNB要获取异系统小区的负荷信息时, 源 小区的 S— eNB通过 S1接口向所连接的 MME发送资源状态请求信息。 在资源状 态请求消息中增加目标节点标识, 目标节点标识包括 RNC (无线网络控制器) 和 BSC (基站控制器)标识或者目标小区标识, MME在接收到此资源状态请 求消息之后,将此资源状态请求消息转发给与其连接异系统核心网节点,例如, 核心网节点包括 SGSN (服务 GPRS支持节点 )等。 目标系统的核心网节点根据 资源状态请求消息中的目标节点标识查找对应的目标节点,目标节点根据资源 状态请求消息中的条件, 发给 S— eNB交互负荷信息, 例如, 其过程可以如图 9 所示。
参见图 9 , 为本发明另一实施例的一种异系统无线节点之间通过核心网节 点进行负荷信息交互的流程示意图。
S901 : S— eNB发出的资源状态请求消息经过 MME、 目标节点所属的第一 核心网节点到达目标节点;
S902: 目标节点发出的资源状态响应消息经过第一核心网节点和 MME到 达 S— eNB;
S903: 目标节点发出的资源状态更新消息经过第一核心网节点和 MME到 达 S— e鳳
在本发明的另一实施例中,当源网络节点要获取相邻节点小区的负荷信息 时, 源网络节点向本节点所属的 EMS (网元管理系统)发送相邻节点小区的资 源状态查询消息, EMS在接收到此查询消息之后,根据目标网络节点的标识信 息在本 EMS所管理的网络节点中查询目标网络节点;或者通过 EMS之间的水平 接口向目标网络节点所属的 EMS进行查询;或者通过北向接口 Itf-N向 NMS (网 络管理系统)进行查询。 源 EMS, 目标 EMS, 或者 NMS在收到资源状态查询 消息之后 , 向源网络节点返回目标网络节点小区的负荷信息。
小区间进行负荷均衡决策的过程, 可以如下所述。
源小区中的 S— eNB在获得相邻小区的负荷信息之后,根据如下的原则进行 决策:
负荷均衡对象 (即邻小区)的选取: 源小区中的 S— eNB通过统计源小区与 邻小区的性能参数获取负荷均衡对象, 即候选目标小区集, 这里的性能参数包 括源小区与目标小区之间的切换次数, 切换成功率等。
对于源小区和邻小区的负荷的考虑, 可以有以下两种方式:
1 )对于源小区和邻小区的空口资源、 传输资源、 硬件资源的负荷状况分 别考虑, 当有任何一种资源处于过载状态时, 首先考虑基于过载的资源的负荷 均衡; 当没有资源处于过载状态时, 只考虑空口资源的负荷均衡。
2 )只考虑小区的综合负荷, 根据源小区与邻小区的综合负荷进行负荷均 衡决策。
例如,该负荷均衡是指通过预置的措施使得负荷较轻小区分担部分负荷较 重小区的业务,该预置的措施包括通过修改移动性参数引起的切换和由网络触 发的切换。 例如, 当本小区负荷和候选目标小区的负荷的差值超过预置的门限时, 确 认候选目标小区为进行移动性参数修改的目标小区。 小区间进行移动性参数修改的过程, 可以如下所述。
参见图 10,为本发明另一实施例的一种小区间进行移动性参数修改流程示 意图。
S1001 : S— eNB根据负荷均衡策略的结果, 向目标节点发送参数修改请求 (Parameter modification request)消息, 该参数爹改请求消息发送的路径可以是 LTE内的 X2接口、 S1接口, 也可以是异系统之间的接口。
S1002: 目标节点在收到此参数修改请求消息之后, 根据请求消息中的内 容, 在本地判决是否可以进行本地参数修改。
如果可以修改, 则返回表明成功修改的参数修改响应 ( Parameter modification response )消息, 并修改本地参数; 如果目标节点本地策略不能按 照请求消息中的内容进行修改, 则返回参数修改响应消息, 表明修改失败, 并 携带相应的原因值和可修改的参数范围。
S1003 : S— eNB接收目标节点返回的参数修改响应消息, 如果是修改成功 的参数修改响应, 则按照请求内容也修改本地参数; 如果是修改失败的参数修 改响应, 则放弃本次修改, 或者根据返回原因值发起新的参数修改请求。
通过上述实施例的描述可知,在获知本小区和邻小区负荷信息后, 釆取对 小区间进行移动性参数修改的过程, 实现小区负荷信息的均衡。
本发明另一实施例还提供一种小区负荷均衡装置,该装置可以是位于 eNB 内部的功能实体, 也可以是 eNB本身, 也可以是独立于 eNB的一个功能实体, 可以通过软件、 硬件或软硬件结合方式实现。
参见图 11 , 该小区负荷均衡装置可以包括:
负荷信息获取单元 1101 , 用于获取本小区的负荷信息, 才艮据本小区的负 荷信息获取邻小区的负荷信息。
发送单元 1102 , 用于当根据所述负荷信息获取单元 1101获取的本小区的 负荷信息以及邻接小区的负荷信息确定是否需要修改移动性参数,当确定需要 修改移动性参数时, 向所述邻接小区发送参数修改请求消息。 均衡单元 1103 , 用于根根接收到的所述邻接小区反馈的参数修改是否成 功的信息执行相应操作。 例如, 具体地, 如果均衡单元 1103接收到修改成功 的参数修改响应, 则按照请求内容也修改本地参数; 如果均衡单元 1103接收 到修改失败的参数修改响应, 则放弃本次修改, 或者根据返回原因值发起新的 参数修改请求。
可选地, 所述负荷信息获取单元 1101用于获取本小区的负荷信息, 其中, 所述本小区的负荷信息包括空口资源、硬件资源以及传输资源。 负荷信息获取 单元 1101用于当空口资源, 或者硬件资源, 或者传输资源的负荷超过第一预 设门限时, 获取邻接小区的负荷信息。 或者, 负荷信息获取单元 1101用于根 据小区的综合负荷获取邻接小区的负荷信息, 例如, 用于计算小区的负荷等于 空口资源的负荷与空口资源系数的乘积,以及传输资源负荷与传输资源系数的 乘积, 以及硬件资源负荷与硬件资源系数的乘积的总和, 当小区的负荷超过第 二预设门限时, 获取邻接小区的负荷信息。
发送单元 1102, 还用于向所述邻接小区发送包含指示参数的资源状态请 求消息, 该指示参数用于指示邻接小区以事件触发方式上报负荷信息, 或者, 指示邻接小区以周期和事件触发结合的方式上报负荷信息。其中, 当本小区所 属节点与邻接小区所属节点之间有接口时, 则发送单元 1102直接向邻接小区 所属的节点发送资源状态请求消息,如果没有接口或接口不可用时, 向本小区 所属的核心网节点或者 EMS或者 NMS发送资源状态请求消息, 再由该核心 网节点或者 EMS或者 NMS向邻接小区所属的节点转发该资源状态请求消息。
本发明另一实施例还提供一种小区负荷测量装置,该装置可以是位于 eNB 内部的功能实体, 也可以是 eNB本身, 或独立于所述 eNB的功能实体, 可以 通过软件、 硬件或软硬件结合方式实现。
参见图 12, 该小区负荷测量装置可以包括:
使用状况获取单元 1201 , 用于根据小区的资源使用量, 或者, 小区的空 口剩余资源, 或者, 小区支持的业务类型的服务质量级别标识 QCI的优先级, 或者, 小区的性能参数获取小区的资源负荷。
在本发明的另一实施例中,使用状况获取单元 1201包括 PRB使用率计算 单元 12011 , 用于对非保证比特率 GBR业务的物理资源单元 PRB使用率进行 处理, 并计算小区的资源负荷, 例如本小区的资源负荷, 所述小区的资源负荷 为经过处理的非 GBR业务的 PRB使用率、 GBR业务的 PRB使用率、 信令承 载的 PRB使用率以及公共信道的 PRB使用率的总和。
在本发明的另一实施例中, 所述使用状况获取单元 1201包括最小业务单 元计算单元 12012, 用于设定最小业务单元, 并计算小区的资源负荷, 例如本 小区的资源负荷,所述小区的资源负荷为小区内所有业务所等同的最小业务单 元的总数。 例如, 最小业务单元计算单元 12012, 用于确定满足业务质量 QoE 的优先比特速率为最小保证速率,确定 UE上行速率控制过程的上行优先比特 速率 PBR为不同服务质量级别标识 QCI的 PBR, 并根据所述最小保证速率或 PBR处理所述非 GBR业务的 PRB使用率。
具体地, 计算本小区负荷的方法在上述具体方法实施例中已经详细描述, 在此不再赘述。
本发明实施例还提供一种用于小区负荷均衡的系统,包括:第一小区节点、 第二小区节点和小区负荷均衡装置; 其中, 所述第一小区节点与所述第二小区 节点分别位于相互邻接的两个小区,所述第一小区节点与所述小区负荷均衡装 置位于相同小区;
所述小区负荷均衡装置, 用于从所述第一小区节点获取本小区的负荷信 息, 以及从所述第二小区节点获取邻接小区的负荷信息; 根据所获取的本小区 的负荷信息以及邻接小区的负荷信息确定需要修改移动性参数时,向所述第二 小区节点发送参数修改请求;
所述第二小区节点,根据所述小区负荷均衡装置发送的参数修改请求,对 本地小区的移动性参数进行修改,并向所述小区负荷均衡装置反馈参数修改是 否成功的信息;
所述小区负荷均衡装置,用于根据所述第二小区节点反馈的参数修改是否 成功的信息, 对本地小区的移动性参数进行修改。
在本发明的另一实施例中,
所述小区负荷均衡装置还用于从所述第一小区节点获取本小区的空口资 源负荷,或者硬件资源负荷,或者传输资源负荷,根据本小区的空口资源负荷, 或者硬件资源负荷, 或者传输资源负荷, 获取邻接小区的信息; 或者, 所述小区负荷均衡装置还用于从所述第一小区节点获取本小区的综合负 荷,根据本小区的综合负荷获取邻接小区的负荷信息, 所述本小区的综合负荷 根据所述本小区的空口资源负荷,以及硬件资源负荷,以及传输资源负荷获取。
在本发明的另一实施例中,
所述小区负荷均衡装置还用于根据本小区与邻接小区之间的与切换相关 的性能参数获取候选目标小区的集合,当候选目标小区负荷与本小区负荷的差 值超过预置门限时, 确认该候选目标小区为需要修改移动性参数的目标小区, 向所述第二小区节点发送参数修改请求消息。
在本发明的另一实施例中,
所述负荷信息获取单元还用于向所述第二小区节点发送资源状态请求消 息, 还用于接收所述第二小区节点发送的负荷信息;
其中, 所述资源状态消息携带指示参数, 所述指示参数用于指示邻接小区 当满足事件门限时上报负荷信息, 或者, 用于指示邻接小区当上报周期到达并 且满足事件门限时上报负荷信息。
釆用本发明实施例提供的方案, 可弥补目前标准的缺陷,较准确的计算小 区的负荷, 完善负荷信息交互的流程和参数修改的流程,从而可更好地在网络 中实现 LB方案, 继而可以提高网络的容量, 提高用户接入的成功率, 减少接 入时延。
通过以上的实施例的描述,所属领域的技术人员可以清楚地了解到本发明 可借助软件加必需的通用硬件平台的方式来实现, 当然也可以通过硬件,但很 多情况下前者是更佳的实施方式。基于这样的理解, 本发明的技术方案本质上 或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来,该计算机 软件产品存储在一个存储介质中, 包括若干指令用以使得一台计算机设备 (可 以是个人计算机, 服务器, 或者网络设备等)执行本发明各个实施例所述方法 的全部或部分步骤。 而前述的存储介质包括: U盘、 移动硬盘、 只读存储器 ( ROM ) 、 随机存取存储器 (RAM ) 、 磁碟或者光盘等各种可以存储程序代 码的介质。
在本申请所提供的几个实施例中, 应该理解到, 所揭露的系统, 装置和方 法, 在没有超过本申请的精神和范围内, 可以通过其他的方式实现。 当前的实 施例只是一种示范性的例子, 不应该作为限制, 所给出的具体内容不应该限制 本申请的目的。 例如, 所述单元的划分, 仅仅为一种逻辑功能划分, 实际实现 时可以有另外的划分方式,例如多个单元或组件可以结合或者可以集成到另一 个系统, 或一些特征可以忽略, 或不执行。
以上所描述的装置实施例仅仅是示意性的,其中所述作为分离部件说明的 单元可以是或者也可以不是物理上分开的,作为单元显示的部件可以是或者也 可以不是物理单元,即可以位于一个地方,或者也可以分布到多个网络单元上。 可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目 的。 本领域普通技术人员在不付出创造性劳动的情况下, 即可以理解并实施。
另外, 所描述系统, 装置和方法以及不同实施例的示意图, 在不超出本申 请的范围内, 可以与其它系统, 模块, 技术或方法结合或集成。 另一点, 所显 示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口,装置 或单元的间接耦合或通信连接, 可以是电性, 机械或其它的形式。
以上所述仅是本发明的优选实施方式,应当指出,对于本技术领域的普通 技术人员来说, 在不脱离本发明原理的前提下, 还可以做出若干改进和润饰, 这些改进和润饰也应视为本发明的保护范围。

Claims

权 利 要 求
1、 一种小区负荷均衡方法, 其特征在于, 包括:
获取本小区以及邻接小区的负荷信息;
根据本小区的负荷信息以及所述邻接小区的负荷信息确定需要修改移动 性参数的目标小区;
向确定的目标小区发送参数修改请求;
根据所述邻接小区反馈的参数修改是否成功的信息执行相应操作。
2、 如权利要求 1所述的方法, 其特征在于, 所述获取邻接小区的负荷信 息, 包括:
根据本小区的空口资源负荷, 或者硬件资源负荷, 或者传输资源负荷获取 邻接小区的负荷信息; 或者,
根据本小区的空口资源负荷、硬件资源负荷以及传输资源负荷获取本小区 的综合负荷, 根据所述本小区的综合负荷获取邻接小区的负荷信息。
3、 如权利要求 2所述的方法, 其特征在于, 所述根据本小区的空口资源 负荷, 或者硬件资源负荷, 或者传输资源负荷获取邻接小区的负荷信息, 具体 为:
当本小区的已使用的空口资源占总空口资源的比例达到第一预置门限时, 与邻接小区进行负荷信息交互, 获取邻接小区的负荷信息; 或者,
当本小区已使用的硬件资源负荷占总硬件资源的比例达到第二预置门限 时, 与邻接小区进行负荷信息交互, 获取邻接小区的负荷信息; 或者,
当传输资源占总传输资源的比例达到第三预置门限时,与邻接小区进行负 荷信息交互, 获取邻接小区的负荷信息。
4、 如权利要求 2所述的方法, 其特征在于, 所述根据本小区的空口资源 负荷, 或者硬件资源负荷, 或者传输资源负荷, 获取邻接小区的负荷信息, 具 体为:
当本小区的空口资源负荷, 或者硬件资源负荷, 或者传输资源负荷处于过 载状态时, 与邻接小区进行负荷信息交互, 获取邻接小区的负荷信息。
5、 如权利要求 2所述的方法, 其特征在于, 所述小区的综合负荷具体为: 空口资源负荷与第一预置系数的乘积,以及硬件资源负荷与第二预置系数的乘 积, 以及传输资源负荷与第三预置系数的乘积的总和。
6、 如权利要求 1-5中任意一项权利要求所述的方法, 其特征在于, 所述 根据本小区的负荷信息以及所述邻接小区的负荷信息确定需要修改移动性参 数的目标小区, 包括:
根据本小区与邻接小区之间的与切换相关的性能参数,获取候选目标小区 的集合;
当候选目标小区负荷与本小区负荷的差值超过预置门限时,确认该候选目 标小区为需要修改移动性参数的目标小区。
7、 如权利要求 1-5中任意权利要求所述的方法, 其特征在于, 所述获取 邻接小区的负荷信息包括:
向邻接小区发送资源状态请求消息, 该资源状态消息携带指示参数; 其中, 所述指示参数用于指示邻接小区当满足事件门限时上报负荷信息, 或者, 用于指示邻接小区当上报周期到达并且满足事件门限时上报负荷信息; 接收所述邻接小区发送的负荷信息。
8、 如权利要求 7所述的方法, 其特征在于, 所述事件门限具体为: 小区 负荷的变化满足预置门限值。
9、 如权利要求 7所述的方法, 其特征在于, 所述向邻接小区发送资源状 态请求消息包括:
通过与邻接小区所属节点的接口发送资源状态请求消息; 或者, 通过本小区所属的移动管理实体 MME转发或透传所述资源状态请求消 息; 或者,
通过本小区所属的 MME以及所述邻接小区所属的核心网实体转发所述 资源状态请求消息; 或者,
通过网元管理节点 EMS或网络管理系统 NMS转发所述资源状态请求消 息。
10、 一种小区负荷测量方法, 其特征在于, 包括: 根据小区的资源使用量, 或者, 小区的空口剩余资源, 或者, 小区支持的 业务类型的服务质量级别标识 QCI的优先级, 或者, 小区的性能参数获取小 区的资源负荷。
11、 如权利要求 10所述方法, 其特征在于, 所述根据小区的资源使用量 获取小区的空口负荷信息包括:
对非保证比特率 GBR业务的物理资源单元 PRB使用率进行处理,所述小 区的空口负荷为经过处理的非 GBR业务的 PRB使用率、 GBR业务的 PRB使 用率、 信令承载的 PRB使用率以及公共信道的 PRB使用率的总和; 或者, 设定最小业务单元,所述小区的空口负荷为该小区内所有业务所等同的最 小业务单元的总数。
12、如权利要求 11所述的方法, 其特征在于, 所述对非 GBR业务的 PRB 使用率的处理包括:
确定满足业务质量 QoE的优先比特速率为最小保证速率; 或, 确定用户 设备 UE上行速率控制过程的上行优先比特速率为不同服务质量级别标识 QCI 的优先比特速率;
根据所述最小保证速率或优先比特速率,处理所述非 GBR业务的 PRB使 用率。
13、 如权利要求 12所述的方法, 其特征在于, 所述根据最小保证速率或 者优先比特速率处理所述非 GBR业务的 PRB使用率包括:
根据所述最小保证速率与非 GBR业务的平均速率的比值获取所述非 GBR 业务的 PRB使用率的系数, 所述经过处理的非 GBR业务的 PRB使用率具体 为: 非 GBR业务的 PRB使用率与此系数的乘积; 或者,
根据不同 QCI等级的非 GBR业务的最小保证速率与各 QCI等级的非 GBR 业务的平均速率的比值、或者所述优先比特速率与不同 QCI的非 GBR业务的 平均速率的比值, 获取不同 QCI等级的非 GBR业务的 PRB使用率的系数, 所述经过处理的非保证比特率 GBR业务的 PRB使用率具体为: 各 QCI等级 的非 GBR业务的 PRB使用率与对应系数的乘积之和。
14、 如权利要求 10所述的方法, 其特征在于, 所述空口剩余资源包括小区的空闲资源, 以及已分配给非 GBR业务的资 源中能够分配给其他业务的资源。
15、 一种用于小区负荷均衡的装置, 其特征在于, 包括:
负荷信息获取单元, 用于获取本小区以及邻接小区的负荷信息;
发送单元,用于当根据所述负荷信息单元获取的本小区的负荷信息以及邻 接小区的负荷信息确定需要修改移动性参数时,向所述邻接小区发送参数修改 请求;
均衡单元,用于根据接收到的所述邻接小区反馈的参数修改是否成功的信 息执行相应操作。
16、 如权利要求 15所述的装置, 其特征在于,
所述负荷信息获取单元还用于根据本小区的空口资源负荷,或者硬件资源 负荷, 或者传输资源负荷获取邻接小区的信息; 或者,
所述负荷信息获取单元还用于根据本小区的综合负荷获取邻接小区的负 荷信息, 所述本小区的综合负荷根据所述本小区的空口资源负荷, 以及硬件资 源负荷, 以及传输资源负荷获取。
17、 如权利要求 15所述的装置, 其特征在于, 所述发送单元还用于根据 本小区与邻接小区之间的与切换相关的性能参数获取候选目标小区的集合,当 候选目标小区负荷与本小区负荷的差值超过预置门限时,确认该候选目标小区 为需要修改移动性参数的目标小区, 向所述邻接小区发送参数修改请求消息。
18、 如权利要求 15-17中任意权利要求所述的装置, 其特征在于, 所述负 荷信息获取单元还用于向邻接小区发送资源状态请求消息,还用于接收所述邻 接小区发送的负荷信息;
其中, 所述资源状态消息携带指示参数, 所述指示参数用于指示邻接小区 当满足事件门限时上报负荷信息, 或者, 用于指示邻接小区当上报周期到达并 且满足事件门限时上报负荷信息。
19、 一种小区负荷测量装置, 其特征在于, 包括:
使用状况获取单元, 用于根据小区的资源使用量, 或者, 小区的空口剩余 资源, 或者, 小区支持的业务类型的服务质量级别标识 QCI的优先级, 或者, 小区的性能参数获取小区的资源负荷。
20、 如权利要求 19所述的装置, 其特征在于, 所述使用状况获取单元还 包括 PRB使用率计算单元, 用于对非保证比特率 GBR业务的物理资源单元 PRB使用率进行处理, 并计算小区的负荷, 所述小区的空口负荷为经过处理 的非 GBR业务的 PRB使用率、 GBR业务的 PRB使用率、信令承载的 PRB使 用率以及公共信道的 PRB使用率的总和; 或者,
所述使用状况获取单元还包括最小业务单元计算单元,用于设定最小业务 单元, 并计算小区的负荷, 所述小区的负荷为该小区内所有业务所等同的最小 业务单元的总数。
21、 如权利要求 20所述的装置, 其特征在于, 所述 PRB使用率计算单元 还用于确定满足业务质量 QoE的优先比特速率为最小保证速率, 确定 UE上 行速率控制过程的上行优先比特速率为不同服务质量级别标识 QCI的优先比 特速率, 并根据所述最小保证速率或优先比特速率处理所述非 GBR 业务的 PRB使用率。
22、 一种用于小区负荷均衡的系统, 其特征在于, 包括: 第一小区节点、 第二小区节点和小区负荷均衡装置; 其中, 所述第一小区节点与所述第二小区 节点分别位于相互邻接的两个小区,所述第一小区节点与所述小区负荷均衡装 置位于相同小区;
所述小区负荷均衡装置, 用于从所述第一小区节点获取本小区的负荷信 息, 以及从所述第二小区节点获取邻接小区的负荷信息; 根据所获取的本小区 的负荷信息以及邻接小区的负荷信息确定需要修改移动性参数时,向所述第二 小区节点发送参数修改请求;
所述第二小区节点,根据所述小区负荷均衡装置发送的参数修改请求,对 本地小区的移动性参数进行修改,并向所述小区负荷均衡装置反馈参数修改是 否成功的信息;
所述小区负荷均衡装置,用于根据所述第二小区节点反馈的参数修改是否 成功的信息, 对本地小区的移动性参数进行修改。
23、 如权利要求 22所述的系统, 其特征在于, 所述小区负荷均衡装置还用于从所述第一小区节点获取本小区的空口资 源负荷,或者硬件资源负荷,或者传输资源负荷,根据本小区的空口资源负荷, 或者硬件资源负荷, 或者传输资源负荷, 获取邻接小区的信息; 或者,
所述小区负荷均衡装置还用于从所述第一小区节点获取本小区的综合负 荷,根据本小区的综合负荷获取邻接小区的负荷信息, 所述本小区的综合负荷 根据所述本小区的空口资源负荷,以及硬件资源负荷,以及传输资源负荷获取。
24、 如权利要求 22所述的系统, 其特征在于,
所述小区负荷均衡装置还用于根据本小区与邻接小区之间的与切换相关 的性能参数获取候选目标小区的集合,当候选目标小区负荷与本小区负荷的差 值超过预置门限时, 确认该候选目标小区为需要修改移动性参数的目标小区, 向所述第二小区节点发送参数修改请求消息。
25、 如权利要求 22-24中任意权利要求所述的系统, 其特征在于, 所述负荷信息获取单元还用于向所述第二小区节点发送资源状态请求消 息, 还用于接收所述第二小区节点发送的负荷信息;
其中, 所述资源状态消息携带指示参数, 所述指示参数用于指示邻接小区 当满足事件门限时上报负荷信息, 或者, 用于指示邻接小区当上报周期到达并 且满足事件门限时上报负荷信息。
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US20140135031A1 (en) 2014-05-15
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US8958812B2 (en) 2015-02-17
US20110171952A1 (en) 2011-07-14
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