WO2020125508A1 - 一种均衡负荷的方法、装置、设备及存储介质 - Google Patents

一种均衡负荷的方法、装置、设备及存储介质 Download PDF

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Publication number
WO2020125508A1
WO2020125508A1 PCT/CN2019/124496 CN2019124496W WO2020125508A1 WO 2020125508 A1 WO2020125508 A1 WO 2020125508A1 CN 2019124496 W CN2019124496 W CN 2019124496W WO 2020125508 A1 WO2020125508 A1 WO 2020125508A1
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Prior art keywords
cell
inter
frequency
load
same
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PCT/CN2019/124496
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English (en)
French (fr)
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翟来国
李睿
周晓东
田飞
佟志新
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中兴通讯股份有限公司
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Priority to EP19898785.1A priority Critical patent/EP3902321A4/en
Publication of WO2020125508A1 publication Critical patent/WO2020125508A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/0284—Traffic management, e.g. flow control or congestion control detecting congestion or overload during communication
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/08—Load balancing or load distribution
    • H04W28/082—Load balancing or load distribution among bearers or channels
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L47/00—Traffic control in data switching networks
    • H04L47/10—Flow control; Congestion control
    • H04L47/12—Avoiding congestion; Recovering from congestion
    • H04L47/125—Avoiding congestion; Recovering from congestion by balancing the load, e.g. traffic engineering

Definitions

  • the present disclosure relates to the field of communication technologies, and in particular, to a load balancing method, device, equipment, and storage medium.
  • LTE Long Term Evolution
  • TDD Time Division, Duplex
  • the technical problem to be solved by the present disclosure is to provide a method, device, equipment and storage medium for balancing the load, so as to realize the dynamic load between each inter-frequency cell of the same coverage inter-frequency cell within a base station balanced.
  • a load balancing method in an embodiment of the present disclosure includes: when a user accesses or switches to a current cell in the same base station that also covers an inter-frequency cell group, determining whether the current cell is satisfied A preset serving cell with balanced load conditions; according to the determination result, the load of the same-coverage inter-frequency cell group is balanced.
  • an apparatus for balancing load in an embodiment of the present disclosure includes: a management module, configured to trigger a load evaluation module for evaluation when a user accesses or switches to a current cell of the same coverage inter-frequency cell group A load evaluation module, used to trigger the management module to evaluate whether the current cell is an expected serving cell that satisfies a preset balanced load condition; a balanced execution module, used to determine the result of the load evaluation module To balance the load of the same-coverage inter-frequency cell group.
  • a load balancing device in an embodiment of the present disclosure includes a memory and a processor, the memory stores a load balancing computer program, and the processor executes the computer program to implement the above Method steps.
  • a computer-readable storage medium in an embodiment of the present disclosure stores a load-balanced computer program, and the computer program may be executed by at least one processor to implement the steps of the method described above.
  • FIG. 1 is a schematic diagram of the effect of co-covering different frequency cells in the background technology
  • FIG. 2 is a flowchart of a load balancing method in an embodiment of the present disclosure
  • FIG. 3 is an effect diagram of a first type of load balancing scheme in an embodiment of the present disclosure
  • FIG. 4 is an effect diagram of a second type of load balancing scheme in an embodiment of the present disclosure.
  • FIG. 5 is a flowchart of a method for optionally balancing load in an embodiment of the present disclosure
  • FIG. 6 is an interaction flowchart of various modules in an apparatus for optionally balancing loads in an embodiment of the present disclosure.
  • An embodiment of the present disclosure provides a method for balancing load. As shown in FIG. 2, the method includes: S101. When a user accesses or switches to a current cell in the same base station that covers the same frequency inter-frequency cell group, determine the current Whether the cell is an expected serving cell that satisfies the preset balanced load condition; S102, according to the determination result, balance the load of the same-coverage inter-frequency cell group.
  • the current cell is a cell that the user first accesses or switches over for the first time; the method in the embodiment of the present disclosure may be used for node equipment such as a base station.
  • the load between frequency cells can prevent the cumulative risk of load at low load, and can also be dynamically balanced at high load, thus meeting the needs of dynamic balancing under various load conditions between different frequency cells. It can also achieve a reasonable distribution of load between each inter-frequency cell and a reasonable distribution of users within each inter-frequency cell.
  • multiple cells of different frequencies are configured with different reselection priorities, that is, cell reselection in the LTE air interface system broadcast message (SIB) Priority parameter (CellReselectionPriority), and then on multiple cells of different frequencies, by setting different switching parameters, to achieve the balance between different frequency cells.
  • SIB LTE air interface system broadcast message
  • CellReselectionPriority Priority parameter
  • the general principle of priority setting is to determine the coverage of each frequency, that is, to cover relatively small cells and configure a higher priority.
  • the cell with frequency 1 has the highest priority, followed by frequency 2, and the cell with frequency 3 has the lowest priority.
  • the configuration of different reselection priorities will cause users to initiate access in cells with high priority, and then configure different handover parameter thresholds (inter-frequency handover) to switch users to other inter-frequency cells.
  • the problems with this solution 1) The solution does not need to estimate the load of each cell, and only adjusts the handover parameters to allow users to move between different frequency cells; because the target cell will refuse to switch under high load, it will cause the function to fail. Therefore, it is difficult to meet the requirements of dynamic equilibrium under various load conditions. 2)
  • the switching parameters of each inter-frequency cell are statically configured. In fact, to achieve a better balance, the switching parameters need to be periodically changed according to the actual load of each cell.
  • Load balancing (load balancing), sometimes called load balancing, that is, unloading from a high-load cell to a low-load cell
  • the process is generally divided into four steps: 1) Select the balance initiating cell.
  • the cell load meets the equilibrium initiation conditions, such as exceeding the equilibrium initiation threshold (such as the number of users threshold, PRB utilization threshold, or combination threshold, etc.), and then the cell can meet the conditions for initiating equilibrium; 2) Select the balanced cell. Neighbor cells need to meet the equalized conditions, for example, below the equalized threshold, and then select the equalized cells (one or more) from these neighbor cells that meet the conditions. 3) Select the balanced user group.
  • a group of users is selected according to certain algorithms.
  • In the equalization initiating cell switch the selected group of users to the corresponding equalized cell one by one.
  • the various algorithms of load balancing mainly focus on the balanced cell selection algorithm and the balanced user group selection algorithm.
  • This load balancing scheme has the following shortcomings: 1) No control under low load, regardless of the accumulated risk; 2) There is a risk of failure under high load.
  • This kind of load balancing is often triggered when the cell load exceeds the expected threshold, which belongs to passive balancing. Since it will not initiate balancing below the threshold, and does not meet the requirements of dynamic balancing under various load conditions, there is a problem that some cells accumulate loads until the trigger threshold is reached.
  • the algorithm fails, that is, when each cell with the same coverage and different frequency does not satisfy the equalized condition, the equalized cell cannot be selected , No more equalization between cells with the same coverage and different frequencies.
  • the load balancing process is triggered when the cell load in frequency 2 exceeds the agreed threshold and the cell in frequency 3 is lower than the agreed threshold.
  • the method in the embodiments of the present disclosure can effectively solve the shortcomings in the above two solutions.
  • determining whether the current cell is an expected serving cell that satisfies a preset balanced load condition may include: determining whether the current cell is based on overall load data of the same coverage inter-frequency cell group It is an expected serving cell that meets the preset load balancing conditions.
  • a centralized load evaluation may be performed on each inter-frequency cell in the same-coverage inter-frequency cell group to obtain the overall load data of the same-coverage inter-frequency cell group.
  • the centralized load evaluation has the same meaning as the overall evaluation.
  • the centralized load assessment can be carried out regularly, or it can be dynamically updated when the user or business load changes. That is, the overall load data of the same-coverage inter-frequency cell group is updated according to a preset update condition; where the update condition is one of a preset update period, a change in user load, and a change in service load.
  • load evaluation definitions may be adopted according to different scenarios.
  • simple load definition methods include: 1) the number of users per bandwidth. Assuming that the user behavior model is the same, the number of users supported by the same bandwidth should be roughly the same. The number of users is divided by the bandwidth to obtain the number of users per bandwidth. Use this ratio as the load definition. 2) Based on PRB utilization. Take the PRB utilization of the cell as the load definition.
  • location information can be characterized by TA.
  • a load evaluation algorithm Corresponding to the load definition is a load evaluation algorithm, and embodiments of the present disclosure do not limit specific load evaluation algorithms. For example, you can use a filter to design and select appropriate smoothing parameters to avoid abnormal fluctuations in the load sampling points.
  • the A base station covering the same area and using available inter-frequency cell associations form the co-covering inter-frequency cell group.
  • the equalizing the load of the same-coverage inter-frequency cell group according to the determination result may include: if it is determined to be yes, using the current cell as the desired service Cell; if it is determined not, select an inter-frequency cell of the desired service from the same-coverage inter-frequency cell group, and switch the user from the current cell to the inter-frequency cell of the desired service.
  • the desired service cell is determined for the user.
  • the load between the same-coverage inter-frequency cells in the equalization station can prevent the cumulative risk of load at low load, and can also be dynamically balanced at high load, thus meeting various load conditions between different-frequency cells.
  • the demand for dynamic balance can also achieve a reasonable distribution of load between different frequency cells and a reasonable distribution of users within each different frequency cell.
  • the selecting an inter-frequency cell of the desired service from the co-covering inter-frequency cell group includes: prioritizing the equalized cell selected from the co-covering inter-frequency cell group Level list, select the inter-frequency cell of the desired service.
  • the user accesses a cell of the same coverage inter-frequency cell group for the first time, or switches from another neighboring cell to a cell of the same coverage inter-frequency cell group for the first time, and determines this according to the overall evaluation of the same coverage inter-frequency cell group.
  • the cell is the desired serving cell. If the cell is not the desired serving cell, select the equalized cell priority list for the user from the same-coverage inter-frequency cell group, and select the inter-frequency cell desired to be served according to the equalized cell priority list. If the cell is the desired serving cell, the load situation of the same coverage inter-frequency cell group can be dynamically updated, that is, the overall load data of the same coverage inter-frequency cell group can be updated.
  • the handover of the user from the current cell to the inter-frequency cell of the desired service includes: a target cell of the inter-frequency handover cell pair in the priority list of the balanced cell Perform inter-frequency handover; wherein, the target cell corresponding to the successful inter-frequency handover is the inter-frequency cell desired to serve.
  • the source cell and the target cell are called cell pairs, and the cells in the same-coverage inter-frequency cell group are all inter-frequency, so they are called inter-frequency handover cell pairs in the embodiments of the present disclosure.
  • inter-frequency handover can be performed according to measurement and handover strategies, that is to say, the target cell of the inter-frequency handover cell in the equalized cell priority list performs inter-frequency handover, in a
  • the embodiment includes: performing inter-frequency handover on the target cell of the inter-frequency handover cell pair according to a preset blind cut strategy according to the priority order in the equalized cell priority list; or, according to the Balance the priority order in the cell priority list, measure the target cell of the inter-frequency handover cell pair according to a preset measurement strategy, and perform inter-frequency handover on the target cell of the inter-frequency handover cell pair according to the measurement result .
  • the user after switching the user from the current cell to the selected inter-frequency cell of the desired service, optionally, the user is prohibited from performing inter-frequency handover again within a preset time.
  • corresponding measurement strategies and handover strategies may be used to perform inter-frequency handover, and the user may be switched to an inter-frequency cell desired to be served.
  • the load situation of the same-coverage inter-frequency cell group can be dynamically updated.
  • a timer can be set for the user, and a preset time can be set by the timer, that is, before the timer expires, the user is prohibited from performing handover between the same coverage and different frequency cell groups.
  • the switching strategy may include a blind-cutting switching strategy and a measurement-based switching strategy. That is to say, if there is an equalized cell with a handover strategy of blind cut (that is, an inter-frequency cell that desires to serve), blind cut is preferentially performed on the equalized cell with the highest ranking and a blind cut strategy.
  • a handover strategy of blind cut that is, an inter-frequency cell that desires to serve
  • each inter-frequency frequency measurement configuration can be delivered in sequence according to the equalized cell priority list, that is, in accordance with the priority order, the inter-frequency handover is attempted in turn until the inter-frequency The handover is successful; all the inter-frequency frequency measurement configurations in the priority list can also be delivered at once.
  • the inter-frequency priority is reflected by frequency offset (offsetFreq) or cell offset (cellIndividualOffset), so as to select the most The inter-frequency cell that meets the condition first performs inter-frequency handover.
  • this type of handover can set the trigger reason separately, just like the trigger of balanced load coverage between inter-frequency cells. In principle, the equalized cell cannot refuse this type of handover.
  • the handover strategy is mainly for each inter-frequency handover cell pair, to determine whether it is blind handover (handover that does not require measurement) or handover based on measurement.
  • the coverage of the target cell is greater than that of the source cell, the target cell can provide services for the user, and blind cut can be selected at this time.
  • factors such as location and estimated signal strength of the cell can also be considered.
  • blind cut is only used for near-midpoint users.
  • the history switching statistics can be combined to determine the blind cut.
  • a handover strategy based on measurement is selected.
  • an algorithm for switching strategy selection is not limited.
  • the measurement strategy mainly includes public measurement parameters and specific measurement parameters.
  • the common measurement parameters mainly include reporting parameters such as hysteresis amount, trigger period, reporting interval and number of times. You can select appropriate parameter values according to the load.
  • Specific measurement parameters are mainly measured object parameters such as inter-frequency handover cell-to-frequency offset or cell offset, that is, according to the relative load of inter-frequency handover cell pair, an appropriate frequency offset or cell offset is selected and executed during inter-frequency handover When the priority order is reflected.
  • the algorithm of the measurement strategy is not limited in the embodiments of the present disclosure.
  • the above embodiments can be combined into a load balancing method.
  • the method in the embodiment of the present disclosure is not only suitable for the LTE multi-frequency network, but also suitable for the multi-frequency network of the LTE subsequent evolution mobile communication system.
  • the embodiments of the present disclosure provide a method for selectively balancing the load based on the combination of the various implementation manners in the first embodiment.
  • the embodiments of the present disclosure mainly solve the problem of multiple cells of the same coverage and different frequencies inside the base station (also called intra-station)
  • the problem of dynamic load balancing The embodiments of the present disclosure define these same-coverage, different-frequency cells in the station as the same-coverage, different-frequency cell group, thereby proposing a method for collectively evaluating load and actively balancing the load of the same-coverage, different-frequency cell group.
  • Each inter-frequency cell of the cell group carries out a centralized load assessment.
  • the method includes: S201. Periodically evaluate and update the load of each inter-frequency cell of the same-coverage inter-frequency cell group to obtain the overall load data of the same-coverage inter-frequency cell group. S202. The user accesses a cell of the same coverage inter-frequency cell group for the first time or switches from another neighboring cell to a cell of the same coverage inter-frequency cell group (ie, the current cell) for the first time. S203.
  • S204 According to the centralized load evaluation result, confirm whether the current cell is a desired serving cell. If it is S208. S205. If it is not the desired serving cell, select the equalized cell priority list for the user from the same coverage inter-frequency cell group. S206. For each inter-frequency cell pair in the equalized cell priority list, determine a corresponding measurement and switching strategy according to the inter-frequency handover cell pair. S207: Perform inter-frequency handover between pairs of inter-frequency cells in the same-coverage inter-frequency cell group. S208: Dynamically update the load assessment of each inter-frequency cell of the same-covering inter-frequency cell group. S209. Start a timer. Before the timer expires, the user is prohibited from switching to the same-overlay inter-frequency cell group. S210, the process ends.
  • the embodiments of the present disclosure provide a load balancing device.
  • the inventive concept of the embodiments of the present disclosure is the same as that of the first and second embodiments. Therefore, in the implementation process, the implementation details of the first to third embodiments can refer to each other, and Have corresponding technical effects.
  • the device in the embodiment of the present disclosure may include a co-coverage inter-frequency cell group management module, a co-coverage inter-frequency cell group load evaluation module, a co-coverage inter-frequency cell group balanced cell list selection module, a co-coverage inter-frequency cell group balance execution module, and The same coverage and different frequency cell group measurement and handover strategy module.
  • a master control module of the same coverage inter-frequency cell group can also be added to coordinate the entire equalization process.
  • the above modules can be increased or decreased to obtain an optional load balancing device.
  • the load balancing device in the embodiment of the present disclosure is mainly used for the load of the same-coverage inter-frequency cell group. Therefore, in the embodiment of the present disclosure, the same-coverage inter-frequency cell group is added before the module name; however, in the embodiment of the present disclosure, the module Before adding the same coverage inter-frequency cell group and not adding the same coverage inter-frequency cell group are represented as the same module or component, for example, the management module and the same coverage inter-frequency cell group management module are the same module, and the load evaluation module and the same coverage inter-frequency cell The group load evaluation module is represented as the same module.
  • the apparatus includes: a co-coverage inter-frequency cell group management module, configured to trigger a load when a user accesses or switches to a current cell in the same base station co-covering an inter-frequency cell group
  • the evaluation module performs the evaluation;
  • the co-coverage inter-frequency cell group load evaluation module is used to evaluate whether the current cell is an expected serving cell that meets a preset balanced load condition under the trigger of the management module; for example, according to the co-coverage Overall load data of inter-frequency cell groups to determine whether the current cell is an expected serving cell that satisfies a preset balanced load condition; wherein, each inter-frequency cell in the same-coverage inter-frequency cell group can be subjected to centralized load assessment (Referred to as load assessment for short) to obtain the overall load data of the same-coverage inter-frequency cell group; the same-coverage inter-frequency cell group equalization execution module is used to balance the same-coverage inter-frequency cell according to the result determined by the load evaluation
  • the same-coverage inter-frequency cell group management module is also used to associate the available different-frequency cells covered in the same area to form the same-coverage different-frequency cell group.
  • the same-coverage inter-frequency cell group management module is used to manage all inter-frequency cells that cover the same area within the base station, and associate each inter-frequency cell available therein into a same-coverage inter-frequency cell group.
  • the same-coverage inter-frequency cell group is dynamically maintained, and the load assessment module of the same-coverage inter-frequency cell group is notified to dynamically update the load assessment of the same-coverage inter-frequency cell group.
  • this module is an optional overall control module for overall control of the overall execution of the device. If this module is not used, this process control function can be distributed to other modules.
  • the general control module of the same coverage inter-frequency cell group is activated.
  • the same-coverage different-frequency cell group master control module first obtains the same-coverage different-frequency cell group where the current cell is located from the same-coverage different-frequency cell group management module. If there are no other cells in the same-coverage different-frequency cell group, the same-coverage different-frequency cell group The cell group contains only one cell of the current cell, and the process ends.
  • the current cell is the desired serving cell, there is no need for an equalization process, and the current cell is used as the desired serving cell. If it is not the desired service cell, select the inter-frequency cell of the desired service from the same-coverage inter-frequency cell group, and switch the user from the current cell to the selected inter-frequency cell of the desired service.
  • the load assessment module of the same coverage inter-frequency cell group can be notified to update the load assessment.
  • a timer can be set for the user. Before the timer expires, the user is prohibited from performing handover of the same coverage inter-frequency cell group.
  • the apparatus may further include a balanced cell list selection module for the same-coverage inter-frequency cell group, which is used to determine, in the load evaluation module, that the current cell does not satisfy the preset balance
  • the inter-frequency cell of the desired service is selected according to the equalized cell priority list selected from the same-coverage inter-frequency cell group; for example, according to the equalized cell priority list In the priority order in, perform inter-frequency handover on the target cell of the inter-frequency handover cell pair according to a preset blind cut strategy; or, according to the priority order in the priority list of the equalized cell Measuring the target cell of the frequency-switching cell pair, and performing inter-frequency handover on the target cell of the inter-frequency switching cell pair according to the measurement result.
  • the same-coverage inter-frequency cell group master control module or the same-coverage inter-frequency cell group management module requests the same-coverage inter-frequency cell group to be balanced cell list selection module, from the same coverage difference In the frequency cell group, the equalized cell priority list is selected. Then, the same-coverage inter-frequency cell group equalization execution module is requested to perform inter-frequency handover between inter-frequency cells in the same-coverage inter-frequency cell group, and switch the user to a desired service cell (that is, an inter-frequency cell desired to be served).
  • the same-coverage inter-frequency cell group load evaluation module can be used to evaluate the load of each inter-frequency cell of the same-coverage inter-frequency cell group.
  • load assessment different load assessment definitions can be adopted according to different scenarios.
  • simple load definition methods include: 1) the number of users per bandwidth. Assuming that the user behavior model is the same, the number of users supported by the same bandwidth should be roughly the same. The number of users is divided by the bandwidth to obtain the number of users per bandwidth. Use this ratio as the load definition. 2) Based on PRB utilization. Take the PRB utilization of the cell as the load definition.
  • location information can be characterized by TA.
  • TA location information
  • the embodiments of the present disclosure do not limit the load evaluation algorithm. For example, you can use a filter to design and select appropriate smoothing parameters to avoid abnormal fluctuations in the load sampling points.
  • the same-coverage inter-frequency cell group measurement and handover strategy module provides measurement and handover strategies for the same-coverage inter-frequency cell group source and target cells.
  • the source and target cells are often called cell pairs, and the same-coverage inter-frequency cell group cells are both Inter-frequency, can be called inter-frequency handover cell pair.
  • the handover strategy mainly refers to switching the cell pair for each inter-frequency, and determining whether it is blind handover (handover that does not require measurement) or handover based on measurement.
  • the coverage of the target cell is greater than that of the source cell, the target cell can provide services for the user, and blind cut can be selected at this time.
  • factors such as location and estimated signal strength of the cell can also be considered.
  • blind cut is only used for near-midpoint users.
  • the history switching statistics can be combined to determine the blind cut.
  • a handover strategy based on measurement is selected. When selecting a measurement-based handover, you need to determine the corresponding measurement strategy.
  • the embodiments of the present disclosure do not limit the algorithm for switching strategy selection.
  • the measurement strategy mainly includes public measurement parameters and specific measurement parameters.
  • the common measurement parameters mainly include reporting parameters such as hysteresis amount, trigger period, reporting interval and number of times. You can select appropriate parameter values according to the load.
  • Specific measurement parameters are mainly measured object parameters such as inter-frequency handover cell-to-frequency offset or cell offset, that is, according to the relative load of inter-frequency handover cell pair, an appropriate frequency offset or cell offset is selected and executed during inter-frequency handover When the priority order is reflected.
  • the same-coverage inter-frequency cell group equalized cell list selection module can select and determine the equalized cell priority list from the same-coverage inter-frequency cell group, and request the same-coverage inter-frequency cell group measurement and handover strategy module to provide corresponding measurement and handover strategies .
  • the embodiments of the present disclosure do not limit the selection ranking algorithm.
  • the same coverage inter-frequency cell group measurement and handover strategy module is requested to provide the specific measurement and handover strategy for each inter-frequency handover cell pair in the list, as well as the common measurement strategy.
  • the same-coverage inter-frequency cell group equalization execution module between different-frequency cells in the same-coverage different-frequency cell group, inter-frequency handover is performed according to the equalized cell priority list and corresponding measurement and switching strategies.
  • each inter-frequency frequency measurement configuration can be delivered in sequence according to the equalized cell priority list, that is, in accordance with the priority order, the inter-frequency handover is attempted in turn until the inter-frequency The handover is successful; all the inter-frequency frequency measurement configurations in the priority list can also be delivered at once.
  • the inter-frequency priority is reflected by frequency offset (offsetFreq) or cell offset (cellIndividualOffset), so as to select the most The inter-frequency cell that meets the condition first performs inter-frequency handover.
  • this type of handover can set the trigger reason separately, just like the trigger of balanced load coverage between inter-frequency cells. In principle, the equalized cell cannot refuse this type of handover.
  • the following uses a device with load balancing of all the above modules as an example, through the interactive process of each module, to complete the process of centralized load assessment and active load balancing of the same coverage inter-frequency cell group.
  • the interaction process includes: S001, the load assessment module of the same-coverage inter-frequency cell group periodically performs load assessment. S002, the user accesses the cell of the same coverage inter-frequency cell group for the first time or switches to a certain cell of the same coverage inter-frequency cell group for the first time.
  • S003 The general control module of the same-coverage inter-frequency cell group obtains the same-coverage inter-frequency cell group where the current cell is located from the same-coverage inter-frequency cell group management module.
  • S004 The management module of the same coverage inter-frequency cell group returns a response to the general control module of the same coverage inter-frequency cell group. S005. If the general control module of the same-coverage inter-frequency cell group determines that there is no other inter-frequency cell in the same-coverage inter-frequency cell group where the cell is located, the process ends.
  • S006 The master control module of the same coverage inter-frequency cell group initiates a request to the load evaluation module of the same coverage inter-frequency cell group to confirm whether the current cell is the desired serving cell.
  • the load assessment module of the same coverage inter-frequency cell group returns a response to the master control module of the same coverage inter-frequency cell group.
  • S008 The general control module of the same-coverage inter-frequency cell group according to the response result, if the current cell is the desired serving cell, jump to S018.
  • S009 If it is not the desired serving cell, the master control module of the same coverage inter-frequency cell group initiates a request to the equalized cell list selection module of the same-cover inter-frequency cell group to obtain the balanced cell list.
  • S010 Initiate a request to the load assessment module of the same-coverage inter-frequency cell group to obtain the load of each inter-frequency cell.
  • the same-coverage inter-frequency cell group balanced cell list selection module selects the balanced cell list according to a specific algorithm and sorts them according to priority.
  • the same-coverage inter-frequency cell group is requested by the balanced cell list selection module to the same-coverage inter-frequency cell group measurement and handover strategy module to switch cell pairs according to the inter-frequency to obtain the measurement sum of each inter-frequency cell in the balanced cell list Switch strategy.
  • S013 The equalized cell list selection module of the same coverage inter-frequency cell group constructs the equalized cell priority list and corresponding measurement and handover strategies.
  • the equalized cell list selection module of the same coverage inter-frequency cell group returns the equalized cell list to the general control module of the same coverage inter-frequency cell group.
  • the master control module of the same-coverage inter-frequency cell group initiates a request to the same-coverage inter-frequency cell group equalization execution module to perform equalization.
  • S017 The equalization execution module of the same coverage inter-frequency cell group returns the execution result to the general control module of the same coverage inter-frequency cell group.
  • S018 The master control module of the same coverage inter-frequency cell group requests the load evaluation module of the same coverage inter-frequency cell group to update the load assessment.
  • S019 The master control module of the same-coverage inter-frequency cell group starts a timer for the user, and prevents the user from switching the same-coverage inter-frequency cell group before the timer expires.
  • An embodiment of the present disclosure provides a load balancing device.
  • the device includes a memory and a processor.
  • the memory stores a computer program for load balancing.
  • the processor executes the computer program to implement the first embodiment and the first embodiment. The steps of any one of the two methods.
  • An embodiment of the present disclosure provides a computer-readable storage medium, where the storage medium stores a load-balanced computer program, and the computer program can be executed by at least one processor to implement the method as described in Embodiment 1 and Embodiment 2. Any one of the steps of the method.
  • Embodiment 4 and Embodiment 5 may refer to the foregoing embodiments, and have corresponding technical effects.
  • the present disclosure effectively implements dynamic balancing of loads between different frequency cells that cover the same frequency base station in the same base station.
  • the load between different frequency cells in the same frequency coverage group can be actively equalized, so that the risk of load accumulation can be prevented when the load is low, or it can be dynamically balanced when the load is high, thus satisfying
  • it can also achieve a reasonable distribution of load between different frequency cells and a reasonable distribution of users within each different frequency cell, thereby effectively achieving the same coverage of different frequency cells
  • the dynamic balance of the load between the different frequency cells can be actively equalized, so that the risk of load accumulation can be prevented when the load is low, or it can be dynamically balanced when the load is high, thus satisfying
  • it can also achieve a reasonable distribution of load between different frequency cells and a reasonable distribution of users within each different frequency cell, thereby effectively achieving the same coverage of different frequency cells
  • the dynamic balance of the load between the different frequency cells can be actively equalized, so that the risk of load accumulation can be prevented when the load is low, or it can be dynamically balanced
  • the methods in the above embodiments can be implemented by means of software plus a necessary general hardware platform, and of course, can also be implemented by hardware, but in many cases the former is better Implementation.
  • the technical solution of the present disclosure can be embodied in the form of a software product in essence or part that contributes to the existing technology, and the computer software product is stored in a storage medium (such as ROM/RAM, magnetic disk,
  • the CD-ROM includes several instructions to enable a terminal (which may be a mobile phone, computer, server, air conditioner, or network device, etc.) to execute the methods described in various embodiments of the present disclosure.

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Abstract

本公开公开了一种均衡负荷的方法、装置、设备及存储介质，所述方法包括：在用户接入或切换到同一基站内同覆盖异频小区组的当前小区时，确定所述当前小区是否是满足预设的均衡负荷条件的期望服务小区；根据确定结果，均衡所述同覆盖异频小区组的负荷。

Description

一种均衡负荷的方法、装置、设备及存储介质
本公开要求享有2018年12月21日提交的名称为“一种均衡负荷的方法、装置、设备及存储介质”的中国专利申请CN201811573239.2的优先权，其全部内容通过引用并入本文中。
技术领域
本公开涉及通信技术领域，特别是涉及一种均衡负荷的方法、装置、设备及存储介质。
背景技术
随着用户数量和数据业务的快速增长，LTE(Long Term Evolution，长期演进)网络，尤其在高价值热点区域，逐渐变得拥塞。因此可考虑部署多个频谱(Frequency)来缓解拥塞，也就是使用不同频率的多个小区同覆盖同一个区域。这里的多个频率，可以是FDD(Frequency Division Duplexing，频分双工)制式，也可以是TDD(Time Division Duplex，时分双工)制式。其中“同覆盖”并不是完全意义的相同覆盖含义，如图1所示，由于这些同覆盖小区的频率不同，经常被称为异频小区。这些同覆盖异频小区，在覆盖半径一般会有不同，但在覆盖方向上基本一致，或者覆盖方向只有很小偏差。
当采用不同频率的多个小区同时覆盖时，需要用户或者业务在各个频率上可以相对均衡分布，这样既可以充分利用各个频率，同时用户体验也会更好，而且在各种负荷情况下都可以动态调整。
针对在不同频率的多个小区之间均衡用户或者业务，一些情况中存在不满足各种负荷情况下动态均衡要求的问题。
发明内容
为了克服上述缺陷，本公开要解决的技术问题是提供一种均衡负荷的方法、装置、设备及存储介质，用以实现一个基站内部的同覆盖异频小区的各个异频小区之间负荷的动态均衡。
为解决上述技术问题，本公开实施例中的一种均衡负荷的方法，包括：在用户接入或切换到同一基站内同覆盖异频小区组的当前小区时，确定所述当前小区是否是满足预设的均衡负荷条件的期望服务小区；根据确定结果，均衡所述同覆盖异频小区组的负荷。
为解决上述技术问题，本公开实施例中的一种均衡负荷的装置，包括：管理模块，用 于在用户接入或切换到同覆盖异频小区组的当前小区时，触发负荷评估模块进行评估；负荷评估模块，用于所述管理模块的触发下，评估确定所述当前小区是否是满足预设的均衡负荷条件的期望服务小区；均衡执行模块，用于根据所述负荷评估模块确定的结果，均衡所述同覆盖异频小区组的负荷。
为解决上述技术问题，本公开实施例中的一种均衡负荷的设备，包括存储器和处理器，所述存储器存储有均衡负荷的计算机程序，所述处理器执行所述计算机程序以实现如上所述方法的步骤。
为解决上述技术问题，本公开实施例中的一种计算机可读存储介质，存储有均衡负荷的计算机程序，所述计算机程序可被至少一个处理器执行，以实现如上所述方法的步骤。
上述说明仅是本公开技术方案的概述，为了能够更清楚了解本公开的技术手段，而可依照说明书的内容予以实施，并且为了让本公开的上述和其它目的、特征和优点能够更明显易懂，以下特举本公开的实施方式。
附图说明
通过阅读下文优选实施方式的详细描述，各种其他的优点和益处对于本领域普通技术人员将变得清楚明了。附图仅用于示出优选实施方式的目的，而并不认为是对本公开的限制。而且在整个附图中，用相同的参考符号表示相同的部件。在附图中：
图1是背景技术中同覆盖异频小区的效果示意图；
图2是本公开实施例中一种均衡负荷的方法的流程图；
图3是本公开实施例中第一类型的均衡负荷方案的效果图；
图4是本公开实施例中第二类型的均衡负荷方案的效果图；
图5是本公开实施例中一种可选地均衡负荷的方法的流程图；
图6是本公开实施例中一种可选地均衡负荷的装置中各个模块的交互流程图。
具体实施方式
下面将参照附图更详细地描述本公开的示例性实施例。虽然附图中显示了本公开的示例性实施例，然而应当理解，可以以各种形式实现本公开而不应被这里阐述的实施例所限制。相反，提供这些实施例是为了能够更透彻地理解本公开，并且能够将本公开的范围完整的传达给本领域的技术人员。
在后续的描述中，使用用于表示元件的诸如“模块”、“部件”或“单元”的后缀仅为了有利于本公开的说明，其本身没有特定的意义。因此，“模块”、“部件”或“单元”可以混合地使用。
使用用于区分元件的诸如“第一”、“第二”等前缀仅为了有利于本公开的说明，其本身没有特定的意义。
实施例一
本公开实施例提供一种均衡负荷的方法，如图2所示，所述方法包括：S101，在用户接入或切换到同一基站内同覆盖异频小区组的当前小区时，确定所述当前小区是否是满足预设的均衡负荷条件的期望服务小区；S102，根据确定结果，均衡所述同覆盖异频小区组的负荷。
其中，当前小区为用户首次接入或首次切换过来的小区；本公开实施例中方法可以用于基站等节点设备。
本公开实施例在用户首次接入或首次切换到同覆盖异频小区组的当前小区时，确定当前小区是否是期望服务小区，从而可以根据确定结果，来主动均衡同覆盖异频小区组中异频小区之间的负荷，进而既可在低负荷时预防负荷累计的风险，也可在高负荷时依然可以动态均衡，从而满足了各个异频小区间各种负荷情况下可动态均衡的需求，也可实现各个异频小区之间的负荷合理分布，以及各个异频小区内部用户的合理分布。
一些情况中，如图3所示，假设采用如下第一类型的均衡负荷方案：不同频率的多个小区，配置不同的重选优先级，即LTE空口系统广播消息(SIB)中的小区重选优先级参数(CellReselectionPriority)，然后在不同频率的多个小区上，通过设置不同的切换参数，来实现异频小区间的均衡。
优先级的设定，一般原则是按照各个频率覆盖大小来定，即覆盖相对小的小区，配置较高的优先级。图3中，频率1的小区优先级最高，其次是频率2，频率3的小区优先级最低。
由于配置不同的重选优先级，会导致用户都在优先级高的小区发起接入，然后通过再配置不同的切换参数门限(异频切换)，将用户切换到其他异频小区。
该方案存在的问题：1)该方案不需要估算各小区负荷，仅靠切换参数调整，让用户在各个异频小区间移动；由于目标小区在高负荷情况下会拒绝切换，会导致功能失效，所以也就很难满足各种负荷情况下动态均衡的要求。2)每个异频小区的切换参数为静态配置，实际上要达到较好的均衡，切换参数需要根据各小区的实际负荷定期变动。3)如图3所示，重选优先级较低的小区内，用户分布非常不均，中远点用户的体验很差，即近点用户会几乎全部集中在优先级高的小区，优先级最低的小区几乎是全部远点用户。
再如，假设采用如下第二类型的均衡负荷方案：不同频率的多个小区，配置相同的重选优先级，然后采用负荷均衡(Load balancing)来实现。
负荷均衡(Load balancing)，有时也叫负载均衡，即从高负荷小区卸载到低负荷小区， 过程一般分为四个步骤：1)选择均衡发起小区。小区负荷满足均衡发起条件，如超过均衡发起门限(如用户数门限、PRB利用率门限或者组合门限等)，此时该小区才可以具备发起均衡的条件；2)选择被均衡小区。邻区需要满足被均衡条件，比如低于被均衡门限，然后从这些满足条件的邻区中选择出被均衡小区(1个或者多个)。3)选择被均衡用户组。在均衡发起小区的现有用户中，按照某些算法选择一组用户。4)在均衡发起小区，把选择出的这组用户，逐个切换到相应的被均衡小区。负荷均衡的各种算法，主要集中在被均衡小区选择算法和被均衡用户组选择算法上。
这种负荷均衡方案有以下缺点：1)低负荷下不做控制，任凭累计风险；2)高负荷下存在失效风险。
这种负荷均衡，往往在小区负荷超过期望门限才触发，属于被动式均衡。由于低于门限是不会发起均衡的，不满足各种负荷情况下动态均衡的要求，就存在部分小区累计负荷直至达到触发门限的问题。
当各小区都无法满足被均衡条件(被均衡小区须低于被均衡门限)时，该算法失效，即当每个同覆盖异频小区都不满足被均衡条件时，则选不出被均衡小区，同覆盖异频小区之间再也无法进行均衡了。如图4所示，频率2中小区负荷超过约定门限，且频率3中小区低于约定门限，才触发负荷均衡过程。
而本公开实施例中方法可以有效解决上述两个方案中的缺点。
在本公开实施例的一些实施方式中，确定所述当前小区是否是满足预设的均衡负荷条件的期望服务小区，可以包括：根据同覆盖异频小区组整体负荷数据，确定所述当前小区是否是满足预设的均衡负荷条件的期望服务小区。
其中，可以对所述同覆盖异频小区组中的各个异频小区进行集中式负荷评估，得到所述同覆盖异频小区组整体负荷数据。本公开实施例中集中式负荷评估与整体评估意义相同。当然集中式负荷评估可以可以定期进行，也可以用户或者业务负荷等变化时动态更新。也就是说，根据预设更新条件，对所述同覆盖异频小区组整体负荷数据进行更新；其中更新条件为预设更新周期、用户负荷变化和业务负荷变化中之一。
本公开实施例中可根据不同场景采用不同的负荷评估定义。比如简单的负荷定义方法有：1)每带宽用户数。假定用户行为模型相同，相同带宽支持的用户数应大体一致，用户数除以带宽，得出每带宽用户数，用这个比例作为负荷定义。2)基于PRB利用率。把小区PRB利用率作为负荷定义。
如果要实现异频小区内部用户的合理分布，还可采用更为精细的评估，比如在每带宽用户数比例基础上考虑用户远近位置，即加上位置权重，位置信息可以使用TA来表征。还可以综合几种方式来定义负荷，比如每种方法加上一个权重，得出一个综合考虑的负荷定 义。
与负荷定义相对应的是负荷评估算法，本公开实施例不限制具体的负荷评估算法。比如可以采用滤波器的方式进行设计，选择合适的平滑参数，避免负荷采样点的异常波动。
在本公开实施例的一些实施方式中，所述根据当前的同覆盖异频小区组整体负荷数据，确定所述当前小区是否是满足预设的均衡负荷条件的期望服务小区之前，需要将被同一个基站覆盖在同一个区域且可用的异频小区关联形成所述同覆盖异频小区组。
在本公开实施例的一些实施方式中，所述根据确定结果，均衡所述同覆盖异频小区组的负荷，可以包括：在确定为是的情况下，将所述当前小区作为所述期望服务小区；在确定为不是的情况下，从所述同覆盖异频小区组中选择期望服务的异频小区，并将所述用户从所述当前小区切换到所述期望服务的异频小区。
也就是说，在一些实施方式中，在用户首次接入到或者首次切换到同覆盖异频小区组某个小区(当前小区)时，为用户确定期望服务小区，通过强制进行切换的方式，主动均衡站内同覆盖异频小区之间的负荷，这样既可在低负荷时预防负荷累计的风险，也可在高负荷时依然可以动态均衡，从而满足了各个异频小区间各种负荷情况下可动态均衡的需求，也可实现各个异频小区之间的负荷合理分布，以及各个异频小区内部用户的合理分布。
其中，所述从所述同覆盖异频小区组中选择所述期望服务的异频小区，在一个实施例中，包括：根据从所述同覆盖异频小区组中选择出的被均衡小区优先级列表，选择所述期望服务的异频小区。
也就是说，用户首次接入到同覆盖异频小区组某个小区，或者从其他邻区首次切换到同覆盖异频小区组某个小区，根据同覆盖异频小区组整体评估情况，确定该小区是否是期望的服务小区。如果该小区不是期望使用的服务小区，则从同覆盖异频小区组，为用户选择被均衡小区优先级列表，根据被均衡小区优先级列表选择期望服务的异频小区。如果该小区就是期望使用的服务小区，可动态更新同覆盖异频小区组负荷情况，即更新同覆盖异频小区组整体负荷数据。
其中，所述将所述用户从所述当前小区切换到所述期望服务的异频小区，在一个实施例中，包括：对所述被均衡小区优先级列表中异频切换小区对的目标小区进行异频切换；其中，异频切换成功所对应的目标小区为所述期望服务的异频小区。
在小区切换过程中，源小区和目标小区称为小区对，同覆盖异频小区组中的小区都是异频的，因此在本公开实施例中称之为异频切换小区对。
当然，在异频切换的过程中，可以根据测量和切换策略来进行异频切换，也就是说，所述被均衡小区优先级列表中异频切换小区对的目标小区进行异频切换，在一个实施例中，包括：根据所述被均衡小区优先级列表中的优先级顺序，按照预设的盲切策略对所述异频 切换小区对的目标小区进行异频切换；或者，根据所述被均衡小区优先级列表中的优先级顺序，按照预设的测量策略对所述异频切换小区对的目标小区进行测量，并根据测量结果对所述异频切换小区对的目标小区进行异频切换。
其中，将所述用户从所述当前小区切换到选择的所述期望服务的异频小区之后，可选地包括：在预设时间内，禁止所述用户再次进行异频切换。
在一个实施例中，在一些实施方式中可以根据被均衡小区优先级列表，使用相应的测量策略和切换策略，执行异频切换，将用户切换到期望服务的异频小区。异频切换完成后，可动态更新同覆盖异频小区组负荷情况。执行完毕后，可对该用户设置定时器，通过定时器设置预设时间，也就是说，定时器超时前，禁止该用户进行同覆盖异频小区组间切换。
其中，切换策略可以包括盲切切换策略和基于测量的切换策略。也就是说，如果存在切换策略为盲切的被均衡小区(即为期望服务的异频小区)，则优先对排序最高且为盲切策略的被均衡小区执行盲切。
如果被均衡小区都使用基于测量的切换策略，则可按照被均衡小区优先级列表，依次下发每个异频频点测量配置，也就是按照优先级顺序，依次尝试执行异频切换，直至异频切换成功；也可以一次下发优先级列表中全部异频频点测量配置，异频频点测量配置中通过频率偏置(offsetFreq)或者小区偏置(cellIndividualOffset)来体现异频间优先级，从而选择最先满足条件的异频小区执行异频切换。另外，为了与正常切换相区别，这种切换，可单独设置触发原因，如同覆盖异频小区间均衡负荷触发。被均衡小区对这种类型的切换，原则上不可拒绝。
其中，切换策略，主要为每一个异频切换小区对，确定是盲切(不需要测量的切换)还是基于测量的切换。当目标小区比源小区的覆盖大时，目标小区可为用户提供服务，此时可以选择盲切。另外，为保证盲切的准确性，除上述根据覆盖相对大小外，还可以考虑位置的因素、预估小区信号强度等，比如只对近中点用户，使用盲切。另外还可以再结合历史切换统计，来进行盲切确定。当不确定盲切可以成功时，则选择基于测量的切换策略。当选择基于测量的切换时，则需要确定相应的测量策略。在本公开实施例中不限定切换策略选择的算法。
其中，测量策略，主要包含有公共测量参数和特定测量参数。公共测量参数主要包含如迟滞量、触发周期以及上报间隔、次数等上报参数，可以根据负荷情况选择合适的参数值。特定测量参数主要如异频切换小区对频率偏置或者小区偏置等测量对象参数，即根据异频切换小区对的相对负荷，来选择合适的频率偏置或者小区偏置，在异频切换执行时体现优先级顺序。在本公开实施例中不限定测量策略的算法。
在组合逻辑正确的前提下，上述各个实施方式可以任意组合成一种均衡负荷的方法。 本公开实施例中方法不仅适合于LTE多频网络，也适合LTE后续演进移动通讯系统的多频网络。
实施例二
本公开实施例基于对实施例一中各个实施方式的组合，提供一种可选地均衡负荷的方法，本公开实施例主要是解决基站内部(也称为站内)多个同覆盖异频小区之间进行动态均衡负荷的问题。本公开实施例将站内的这些同覆盖异频小区，定义为同覆盖异频小区组，从而提出一种同覆盖异频小区组集中评估负荷、主动均衡负荷的方法，其采用对同覆盖异频小区组各个异频小区进行集中式负荷评估，在用户首次接入到或者首次切换到同覆盖异频小区组某个小区时，主动选择确定一个期望服务小区作为该用户的服务小区，既可在低负荷时预防负荷累计的风险，也可在高负荷时依然可以动态均衡。详细的，如图5所示，所述方法包括：S201，定时评估并更新同覆盖异频小区组各个异频小区的负荷，得到同覆盖异频小区组整体负荷数据。S202，用户首次接入到同覆盖异频小区组某个小区或者从其他邻区首次切换到同覆盖异频小区组某个小区(即当前小区)。S203，如果该小区所在同覆盖异频小区组不存在其他异频小区，转S210。S204，根据集中式负荷评估结果，确认当前小区是否为期望服务小区。如果是转S208。S205，如果不是期望服务小区，从同覆盖异频小区组，为用户选择被均衡小区优先级列表。S206，对于被均衡小区优先级列表中每个异频小区对，根据异频切换小区对来确定相应的测量和切换策略。S207，在同覆盖异频小区组异频小区对之间，执行异频切换。S208，动态更新同覆盖异频小区组各个异频小区的负荷评估。S209，启动定时器，定时器超时前禁止该用户同覆盖异频小区组切换。S210，流程结束。
实施例三
本公开实施例提供一种均衡负荷的装置，本公开实施例的发明构思与实施例一和实施例二相同，因此在实现过程中，实施例一至实施例三中的实施细节可以互相参考，也具有相应的技术效果。本公开实施例中装置可以包括同覆盖异频小区组管理模块、同覆盖异频小区组负荷评估模块、同覆盖异频小区组被均衡小区列表选择模块、同覆盖异频小区组均衡执行模块以及同覆盖异频小区组测量和切换策略模块。为方便整个流程控制，当然还可以增加同覆盖异频小区组总控模块来协调整个均衡过程。当然在实现时，可以将上述各个模块进行增减，以得到一个可选地均衡负荷的装置。
本公开实施例中均衡负荷的装置主要用于同覆盖异频小区组的负荷，因此在本公开实施例中在模块名称前加了同覆盖异频小区组；但是在本公开实施例中在模块前加同覆盖异频小区组与不加同覆盖异频小区组表示为同一模块或组件，例如，管理模块与同覆盖异频小区组管理模块为同一模块，负荷评估模块与同覆盖异频小区组负荷评估模块表示为同一 模块。
在本公开实施例的一些实施方式中，所述装置包括：同覆盖异频小区组管理模块，用于在用户接入或切换到同一基站内同覆盖异频小区组的当前小区时，触发负荷评估模块进行评估；同覆盖异频小区组负荷评估模块，用于所述管理模块的触发下，评估确定所述当前小区是否是满足预设的均衡负荷条件的期望服务小区；例如，根据同覆盖异频小区组整体负荷数据，确定所述当前小区是否是满足预设的均衡负荷条件的期望服务小区；其中，可以对所述同覆盖异频小区组中的各个异频小区进行集中式负荷评估(简称为负荷评估)，得到所述同覆盖异频小区组整体负荷数据；同覆盖异频小区组均衡执行模块，用于根据所述负荷评估模块确定的结果，均衡所述同覆盖异频小区组的负荷。
其中，同覆盖异频小区组管理模块还用于将被覆盖在同一个区域且可用的异频小区关联形成所述同覆盖异频小区组。
在一个实施例中，同覆盖异频小区组管理模块：用于管理基站内部覆盖同一个区域的全部异频小区，将其中可用的各个异频小区关联成一个同覆盖异频小区组。当异频小区增删和可用状态发生变化时，动态维护同覆盖异频小区组，并通知同覆盖异频小区组负荷评估模块，动态更新同覆盖异频小区组的负荷评估。
同覆盖异频小区组总控模块：这个模块是可选地总体控制模块，用于总体上控制装置的整体执行。如果不使用本模块，可将此过程控制功能分散到其他模块中。
用户首次接入到，或者首次切换到同覆盖异频小区组某个小区时，启动同覆盖异频小区组总控模块。
同覆盖异频小区组总控模块首先从同覆盖异频小区组管理模块获取当前小区所在的同覆盖异频小区组，如果该同覆盖异频小区组不存在其他小区，即该同覆盖异频小区组只包含当前小区一个小区，流程结束。
然后，请求同覆盖异频小区组负荷评估模块，确定当前小区是否为期望服务小区。
如果当前小区就是期望服务小区，则无需进行均衡过程，将所述当前小区作为所述期望服务小区。如果不是期望服务小区，从所述同覆盖异频小区组中选择期望服务的异频小区，并将所述用户从所述当前小区切换到选择的所述期望服务的异频小区。
最后，可通知同覆盖异频小区组负荷评估模块，更新负荷评估。同时可对该用户设置定时器，定时器超时前，禁止该用户进行同覆盖异频小区组切换。
在本公开实施例的一些实施方式中，所述装置还可以包括同覆盖异频小区组被均衡小区列表选择模块，其用于在所述负荷评估模块确定所述当前小区不满足预设的均衡负荷条件的期望服务小区时，根据从所述同覆盖异频小区组中选择出的被均衡小区优先级列表，选择所述期望服务的异频小区；例如，根据所述被均衡小区优先级列表中的优先级顺序， 按照预设的盲切策略对所述异频切换小区对的目标小区进行异频切换；或者，根据所述被均衡小区优先级列表中的优先级顺序，对所述异频切换小区对的目标小区进行测量，以及根据测量结果对所述异频切换小区对的目标小区进行异频切换。
也就是说，如果当前小区就不是期望服务小区，同覆盖异频小区组总控模块或者同覆盖异频小区组管理模块，请求同覆盖异频小区组被均衡小区列表选择模块，从同覆盖异频小区组中，选择出被均衡小区优先级列表。而后请求同覆盖异频小区组均衡执行模块，在同覆盖异频小区组异频小区之间，执行异频切换，将用户切换到期望的服务小区(即期望服务的异频小区)。
在一个实施例中，同覆盖异频小区组负荷评估模块：可以用于评估同覆盖异频小区组各个异频小区负荷。对于负荷评估的定义，可根据不同场景采用不同的负荷评估定义。
比如简单的负荷定义方法有：1)每带宽用户数。假定用户行为模型相同，相同带宽支持的用户数应大体一致，用户数除以带宽，得出每带宽用户数，用这个比例作为负荷定义。2)基于PRB利用率。把小区PRB利用率作为负荷定义。
如果要实现异频小区内部用户的合理分布，还可采用更为精细的评估，比如在每带宽用户数比例基础上考虑用户远近位置，即加上位置权重，位置信息可以使用TA来表征。还可以综合几种方式来定义负荷，比如每种方法加上一个权重，得出一个综合考虑的负荷定义。
与负荷定义相对应的是负荷评估算法，本公开实施例不限制负荷评估算法。比如可以采用滤波器的方式进行设计，选择合适的平滑参数，避免负荷采样点的异常波动。
同覆盖异频小区组测量和切换策略模块，提供同覆盖异频小区组源小区和目标小区的测量和切换策略，源小区和目标小区常称为小区对，同覆盖异频小区组小区都是异频，可称为异频切换小区对。
切换策略主要是指为每一个异频切换小区对，确定是盲切(不需要测量的切换)还是基于测量的切换。当目标小区比源小区的覆盖大时，目标小区可为用户提供服务，此时可以选择盲切。另外，为保证盲切的准确性，除上述根据覆盖相对大小外，还可以考虑位置的因素、预估小区信号强度等，比如只对近中点用户，使用盲切。另外还可以再结合历史切换统计，来进行盲切确定。当不确定盲切可以成功时，则选择基于测量的切换策略。当选择基于测量的切换时，则需要确定相应的测量策略。本公开实施例不限定切换策略选择的算法。
测量策略，主要包含公共测量参数和特定测量参数。公共测量参数主要包含如迟滞量、触发周期以及上报间隔、次数等上报参数，可以根据负荷情况选择合适的参数值。特定测量参数主要如异频切换小区对频率偏置或者小区偏置等测量对象参数，即根据异频切换小 区对的相对负荷，来选择合适的频率偏置或者小区偏置，在异频切换执行时体现优先级顺序。
同覆盖异频小区组被均衡小区列表选择模块可以从同覆盖异频小区组选择并确定被均衡小区优先级列表，并请求同覆盖异频小区组测量和切换策略模块提供相应的测量和切换策略。
在为用户选择被均衡小区列表时，本公开实施例不限制选择排序算法。实施时，可简单使用各个异频小区的负荷值进行排序；还可以考虑各个异频小区的相对覆盖和用户位置、预估的参考信号强度等因素，如存在多个异频小区负荷值相近的情况下，可把根据用户位置预估出参考信号强度高的异频小区优先级提高，这样可为用户提供更好的业务体验。
可以看出，通过选择合理的负荷定义和合理的被均衡小区选择算法，可以很容易在各个异频小区间均衡负荷，也容易实现每个异频小区内的用户合理分布。
在选择被均衡小区优先级列表时，请求同覆盖异频小区组测量和切换策略模块提供列表内每个异频切换小区对的特定测量和切换策略，以及公共测量策略。
同覆盖异频小区组均衡执行模块：在同覆盖异频小区组异频小区之间，按照被均衡小区优先级列表和相应的测量和切换策略，执行异频切换。
如果存在切换策略为盲切的被均衡小区(期望服务的异频小区)，则优先对排序最高且为盲切策略的被均衡小区执行盲切。
如果被均衡小区都使用基于测量的切换策略，则可按照被均衡小区优先级列表，依次下发每个异频频点测量配置，也就是按照优先级顺序，依次尝试执行异频切换，直至异频切换成功；也可以一次下发优先级列表中全部异频频点测量配置，异频频点测量配置中通过频率偏置(offsetFreq)或者小区偏置(cellIndividualOffset)来体现异频间优先级，从而选择最先满足条件的异频小区执行异频切换。另外，为了与正常切换相区别，这种切换，可单独设置触发原因，如同覆盖异频小区间均衡负荷触发。被均衡小区对这种类型的切换，原则上不可拒绝。
基于上述各个实施方式，以下以具有上述所有模块的均衡负荷的装置为例，通过各模块的交互流程，从而完成同覆盖异频小区组集中评估负荷和主动均衡负荷过程，下面结合附图6，交互流程包括：S001，同覆盖异频小区组负荷评估模块定期进行负荷评估。S002，用户首次接入到同覆盖异频小区组小区或者首次切换到同覆盖异频小区组某个小区。S003，同覆盖异频小区组总控模块向同覆盖异频小区组管理模块获取当前小区所在的同覆盖异频小区组。S004，同覆盖异频小区组管理模块向同覆盖异频小区组总控模块返回响应。S005，同覆盖异频小区组总控模块如判断该小区所在同覆盖异频小区组不存在其他异频小区，流程结束。
S006，同覆盖异频小区组总控模块向同覆盖异频小区组负荷评估模块发起请求，确认当前小区是否为期望服务小区。S007，同覆盖异频小区组负荷评估模块向同覆盖异频小区组总控模块返回响应。S008，同覆盖异频小区组总控模块根据响应结果，如果当前小区是期望服务小区，跳转到S018。S009，如果不是期望服务小区，同覆盖异频小区组总控模块向同覆盖异频小区组被均衡小区列表选择模块发起请求，获取被均衡小区列表。S010，向同覆盖异频小区组负荷评估模块发起请求，获取各个异频小区的负荷。S011，同覆盖异频小区组被均衡小区列表选择模块根据特定算法，选出被均衡小区列表并按照优先级排序。S012，同覆盖异频小区组被均衡小区列表选择模块向同覆盖异频小区组测量和切换策略模块发起请求，按照异频切换小区对，获取被均衡小区列表中每个异频小区的测量和切换策略。S013，同覆盖异频小区组被均衡小区列表选择模块构建被均衡小区优先级列表及相应的测量和切换策略。S014，同覆盖异频小区组被均衡小区列表选择模块向同覆盖异频小区组总控模块返回被均衡小区列表。S015，同覆盖异频小区组总控模块向同覆盖异频小区组均衡执行模块发起请求，执行均衡。S016，同覆盖异频小区组均衡执行模块，按照被均衡小区列表，在同覆盖异频小区组异频小区之间，执行异频切换。S017，同覆盖异频小区组均衡执行模块向给同覆盖异频小区组总控模块返回执行结果。S018，同覆盖异频小区组总控模块请求同覆盖异频小区组负荷评估模块更新负荷评估。S019，同覆盖异频小区组总控模块对该用户启动定时器，定时器超时前禁止该用户同覆盖异频小区组切换。
实施例四
本公开实施例提供一种均衡负荷的设备，所述设备包括存储器和处理器，所述存储器存储有均衡负荷的计算机程序，所述处理器执行所述计算机程序以实现如实施例一和实施例二中任意一项所述方法的步骤。
实施例五
本公开实施例提供一种计算机可读存储介质，其中，所述存储介质存储有均衡负荷的计算机程序，所述计算机程序可被至少一个处理器执行，以实现如实施例一和实施例二中任意一项所述方法的步骤。
实现过程中，实施例四和实施例五可以参阅上述各个实施例，具有相应的技术效果。
本公开有效实现同一基站内同覆盖异频小区的各个异频小区之间负荷的动态均衡。上述的各个实施例中可主动均衡同覆盖异频小区组中异频小区之间的负荷，进而既可在低负荷时预防负荷累计的风险，也可在高负荷时依然可以动态均衡，从而满足了各个异频小区间各种负荷情况下可动态均衡的需求，也可实现各个异频小区之间的负荷合理分布，以及各个异频小区内部用户的合理分布，从而有效实现同覆盖异频小区的各个异频小区之间负荷的动态均衡。
需要说明的是，在本文中，术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者装置不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者装置所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括该要素的过程、方法、物品或者装置中还存在另外的相同要素。
上述本公开实施例序号仅仅为了描述，不代表实施例的优劣。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到上述实施例方法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，本公开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(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端(可以是手机，计算机，服务器，空调器，或者网络设备等)执行本公开各个实施例所述的方法。
上面结合附图对本公开的实施例进行了描述，但是本公开并不局限于上述的实施方式，上述的实施方式仅仅是示意性的，而不是限制性的，本领域的普通技术人员在本公开的启示下，在不脱离本公开宗旨和权利要求所保护的范围情况下，还可做出很多形式，这些均属于本公开的保护之内。

Claims (10)

  1. 一种均衡负荷的方法，其中，所述方法包括：
    在用户接入或切换到同一基站内同覆盖异频小区组的当前小区时，确定所述当前小区是否是满足预设的均衡负荷条件的期望服务小区；
    根据确定结果，均衡所述同覆盖异频小区组的负荷。
  2. 如权利要求1所述的方法，其中，所述确定所述当前小区是否是满足预设的均衡负荷条件的期望服务小区，包括：
    根据同覆盖异频小区组整体负荷数据，确定所述当前小区是否是满足预设的均衡负荷条件的期望服务小区。
  3. 如权利要求2所述的方法，其中，所述根据当前的同覆盖异频小区组整体负荷数据，确定所述当前小区是否是满足预设的均衡负荷条件的期望服务小区之前，包括：
    将被同一基站内覆盖在同一个区域且可用的异频小区关联形成所述同覆盖异频小区组；
    对所述同覆盖异频小区组中的各个异频小区进行集中式负荷评估，得到所述同覆盖异频小区组整体负荷数据。
  4. 如权利要求1所述的方法，其中，所述根据确定结果，均衡所述同覆盖异频小区组的负荷，包括：
    在确定为是的情况下，将所述当前小区作为所述期望服务小区；
    在确定为不是的情况下，从所述同覆盖异频小区组中选择期望服务的异频小区，并将所述用户从所述当前小区切换到选择的所述期望服务的异频小区。
  5. 如权利要求4所述的方法，其中，所述从所述同覆盖异频小区组中选择期望服务的异频小区，包括：
    根据从所述同覆盖异频小区组中选择出的被均衡小区优先级列表，选择所述期望服务的异频小区。
  6. 如权利要求5所述的方法，其中，所述将所述用户从所述当前小区切换到选择的所述期望服务的异频小区，包括：
    对所述被均衡小区优先级列表中异频切换小区对的目标小区进行异频切换；其中，异频切换成功所对应的目标小区为所述期望服务的异频小区。
  7. 如权利要求6所述的方法，其中，所述对所述被均衡小区优先级列表中异频切换小区对的目标小区进行异频切换，包括：
    根据所述被均衡小区优先级列表中的优先级顺序，按照预设的盲切策略对所述异频切换小区对的目标小区进行异频切换；或者，
    根据所述被均衡小区优先级列表中的优先级顺序，按照预设的测量策略对所述异频切 换小区对的目标小区进行测量，以及根据测量结果对所述异频切换小区对的目标小区进行异频切换。
  8. 一种均衡负荷的装置，其中，所述装置包括：
    管理模块，用于在用户接入或切换到同一基站内同覆盖异频小区组的当前小区时，触发负荷评估模块进行评估；
    负荷评估模块，用于所述管理模块的触发下，评估确定所述当前小区是否是满足预设的均衡负荷条件的期望服务小区；
    均衡执行模块，用于根据所述负荷评估模块确定的结果，均衡所述同覆盖异频小区组的负荷。
  9. 一种均衡负荷的设备，其中，所述设备包括存储器和处理器，所述存储器存储有均衡负荷的计算机程序，所述处理器执行所述计算机程序以实现如权利要求1-7中任意一项所述方法的步骤。
  10. 一种计算机可读存储介质，其中，所述存储介质存储有均衡负荷的计算机程序，所述计算机程序可被至少一个处理器执行，以实现如权利要求1-7中任意一项所述方法的步骤。
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