WO2018205501A1 - 一种移动性参数的调整方法及装置和计算机存储介质 - Google Patents

一种移动性参数的调整方法及装置和计算机存储介质 Download PDF

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WO2018205501A1
WO2018205501A1 PCT/CN2017/106874 CN2017106874W WO2018205501A1 WO 2018205501 A1 WO2018205501 A1 WO 2018205501A1 CN 2017106874 W CN2017106874 W CN 2017106874W WO 2018205501 A1 WO2018205501 A1 WO 2018205501A1
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Prior art keywords
load
load balancing
current cell
cell
mobility parameter
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PCT/CN2017/106874
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English (en)
French (fr)
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刘明
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上海中兴软件有限责任公司
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Priority to US16/612,392 priority Critical patent/US10869240B2/en
Priority to EP17909486.7A priority patent/EP3624489A4/en
Publication of WO2018205501A1 publication Critical patent/WO2018205501A1/zh

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/08Reselecting an access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W24/00Supervisory, monitoring or testing arrangements
    • H04W24/02Arrangements for optimising operational condition
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0083Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H04W36/00837Determination of triggering parameters for hand-off
    • 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
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/16Performing reselection for specific purposes
    • 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
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/24Reselection being triggered by specific parameters
    • H04W36/30Reselection being triggered by specific parameters by measured or perceived connection quality data
    • H04W36/302Reselection being triggered by specific parameters by measured or perceived connection quality data due to low signal strength
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/24Reselection being triggered by specific parameters
    • H04W36/32Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/24Reselection being triggered by specific parameters
    • H04W36/32Reselection being triggered by specific parameters by location or mobility data, e.g. speed data
    • H04W36/324Reselection being triggered by specific parameters by location or mobility data, e.g. speed data by mobility data, e.g. speed data
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W48/00Access restriction; Network selection; Access point selection
    • H04W48/20Selecting an access point
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02DCLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D30/00Reducing energy consumption in communication networks
    • Y02D30/70Reducing energy consumption in communication networks in wireless communication networks

Definitions

  • the present disclosure relates to the field of communications technologies, and in particular, to a method and apparatus for adjusting mobility parameters and a computer storage medium.
  • Load balancing means that the cell operating traffic is reasonably deployed according to the serving cell and its neighboring load state, balancing the load between cells, inter-frequency and other radio access technologies in the system, so that system resources can be effectively used to improve user perception and System stability.
  • the load balancing function includes two parts: load balance (LB) and camp load balance (CLB).
  • Connection state load balancing is mainly performed for connected users and is performed by switching.
  • the resident state load balancing is mainly performed for the user who is connected to the idle state and is reselected (changing the reselection priority).
  • Figure 1 is a schematic diagram of the LB technology, as shown in Figure 1.
  • the cell and the neighboring cell of the commercial real network macro station do not necessarily have good overlapping coverage.
  • the external field generally adopts a load balancing function based on measurement.
  • the A4 measurement needs to be sent first, and the signal coverage of the neighboring cell is measured. After the user reports the A4 measurement report of the target cell, the switch is initiated.
  • the load balancing mechanism Due to the load balancing mechanism, after the user is balanced to the low-load target cell, the user needs to prevent the user from triggering the coverage-based handover and then switch back to the high-load cell. On the other hand, it is also necessary to prevent the user from re-selecting after the target cell is released. High load cell. Therefore, the switching/reselection parameters of the current cell and the target cell need to be properly configured.
  • the ping-pong phenomenon may occur between load balancing and coverage-based switching/reselection. It is necessary to suppress the ping-pong phenomenon by reasonable parameter configuration, otherwise the effect of load balancing will be affected.
  • the target cell sets the ping-pong switch protection timer for the hand-in user.
  • the user is not allowed to cut in the user before the timer expires, including the hand-over based on the coverage and the load, and the coverage-based handover is performed to return to the source cell.
  • the target cell configures the A2Hys offset value for the ping-pong in the first A2 event measurement reconfiguration, and starts the ping-pong A2 event timer to prevent the timer from being timed out before the timer expires. It is difficult for the UE to switch to enter the A2 event.
  • the configured load balancing A4 measurement threshold is higher than the switched A2 threshold to prevent ping-pong caused by parameter configuration.
  • the configured load balancing A4 measurement threshold is higher than the detection threshold of the inter-frequency reselection to prevent parameter configuration. Ping pong.
  • the above measures require manual configuration of timers or thresholds based on the parameter settings of the base station. The timer expires and expires. Manually configuring each threshold according to the parameters of the base station will add redundant workload to the load balancing function.
  • the load balancing function of the connected state uses the handover mode to migrate the UE from the high-load cell to the low-load cell, so that the UE switches back to the high-load cell after the handover based on the coverage or after the release. Re-selection to the high-load cell situation, resulting in load balancing effects can not be maintained and a large number of meaningless switching and re-election, affecting network stability.
  • the present invention is to solve the above actual network problem.
  • a method and apparatus for adjusting mobility parameters solves the problem of ping-pong switching and reselection after the load balancing function is turned on.
  • the mobility parameter of the target neighboring area is adjusted.
  • the selecting a target neighboring area for load balancing according to a load condition of a current cell includes:
  • the neighboring area whose load is lower than the current cell load is selected from the same coverage neighboring area as the target neighboring area for load balancing.
  • comparing the mobility parameter of the target neighboring cell with a load balancing threshold of a current cell, and obtaining a comparison result includes:
  • the difference between the mobility parameter of the target neighboring cell and the load balancing threshold of the current cell is determined by comparing a mobility parameter of the target neighboring cell with a load balancing threshold of the current cell.
  • the adjusting the mobility parameter of the target neighbor according to the comparison result includes:
  • the automatic adjustment step is continuously adjusted.
  • the mobility parameter of the target neighboring area is not smaller than the preset threshold by the difference between the mobility parameter of the adjusted target neighboring cell and the load balancing threshold of the current cell.
  • the method further includes:
  • the load of the current cell when the preset cycle time arrives is higher than the load balancing start threshold, the load is applied
  • the mobility parameter of the target neighboring cell of the current cell is restored, otherwise the mobility parameters of all selected target neighboring cells for load balancing are restored.
  • a storage medium stores a program for implementing an adjustment method of the mobility parameter.
  • a screening module configured to select a target neighboring area for load balancing according to a load condition of the current cell
  • a comparison module configured to compare a mobility parameter of the target neighboring cell with a load balancing threshold of a current cell, to obtain a comparison result
  • an adjustment module configured to adjust a mobility parameter of the target neighboring area according to the comparison result.
  • the screening module is configured to compare the load of the current cell with a load balancing start threshold, and if the load of the current cell is higher than the load balancing start threshold, A neighboring area with a load lower than the current cell load is selected as a target neighboring area for load balancing.
  • the comparing module is configured to determine a mobility parameter of the target neighboring cell and a current cell by comparing a mobility parameter of the target neighboring cell with a load balancing threshold of the current cell. The difference between the load balancing thresholds.
  • the adjusting module is configured to: when the difference between the mobility parameter of the target neighboring cell and the load balancing threshold of the current cell is greater than or equal to a preset threshold, not less than a mobility parameter is lowest Under the condition of the limit value, the mobility parameter of the target neighboring area is continuously adjusted according to the automatic adjustment step, until the difference between the adjusted mobility parameter of the target neighboring cell and the load balancing threshold of the current cell is smaller than the pre-predetermined Set the threshold.
  • the adjusting device of the mobility parameter further includes:
  • a recovery module configured to compare a load of the current cell's preset cycle time with a load balancing start threshold after adjusting the mobility parameter of the target neighbor according to the comparison result, and if If the load of the current cell's preset cycle time is higher than the load balancing start threshold, the mobility parameter of the target neighboring cell with the load higher than the current cell is restored, otherwise all selected loads are used for the load. The mobility parameters of the balanced target neighborhood are restored.
  • the present invention also provides a computer storage medium having stored therein one or more programs executable by a computer, the one or more programs being executed by the computer to cause the computer to perform the mobility described above The method of adjusting the parameters.
  • the present invention can eliminate the risk of ping-pong switching or re-selection generated after the load balancing function is turned on in the commercial network, thereby stabilizing the equalization effect, and the mobility of the network is eliminated due to elimination of a large number of ping-pong switching and re-selection.
  • the indicator has been stabilized.
  • Figure 1 is a schematic diagram of the LB technology
  • FIG. 2 is a block diagram of a method for adjusting mobility parameters according to an embodiment of the present invention
  • FIG. 3 is a block diagram of an apparatus for adjusting mobility parameters according to an embodiment of the present invention.
  • FIG. 4 is a flow chart of adjusting mobility parameters in a load balancing scenario.
  • FIG. 2 is a block diagram of a method for adjusting mobility parameters according to an embodiment of the present invention. As shown in FIG. 2, the steps include:
  • Step S101 Select a target neighboring area for load balancing according to the load condition of the current cell.
  • Step S101 includes: comparing the load of the current cell with a load balancing start threshold, and if the load of the current cell is higher than the load balancing start threshold, filtering the load from the same coverage neighboring area is lower than the current
  • the neighboring cell of the cell load, as the target neighboring zone for load balancing may have one or more target neighboring zones, and the selected target neighboring zone is put into the set N.
  • Step S102 Compare the mobility parameter of the target neighboring cell with the load balancing threshold of the current cell to obtain a comparison result.
  • Step S102 includes: determining a difference between a mobility parameter of the target neighboring cell and a load balancing threshold of the current cell by comparing a mobility parameter of the target neighboring cell with a load balancing threshold of the current cell.
  • the mobility parameter of the target neighbor includes S NONINTRASEACH and A2
  • the load balancing threshold of the current cell refers to a load balancing A4 threshold. That is to say, the mobility parameters S NONINTRASEACH and A2 of the target neighboring area need to be compared with the load balancing A4 threshold of the current cell, respectively.
  • Step S103 Adjust the mobility parameter of the target neighboring area according to the comparison result, and specifically, adjust the mobility parameter of the target neighboring area to be constrained.
  • Step S103 includes: when the difference between the mobility parameter of the target neighboring cell and the load balancing threshold of the current cell is greater than or equal to a preset threshold, and automatically adjusting according to a condition that is not less than a minimum limit value of the mobility parameter.
  • the step size continuously adjusts the mobility parameter of the target neighboring area until the difference between the adjusted mobility parameter of the target neighboring cell and the load balancing threshold of the current cell is less than the preset threshold.
  • the optional range of the preset threshold is [-10, -1], for example, optionally -3, -4, -5, -6, etc., preferably -3.
  • the automatic adjustment step size ⁇ is continuously adjusted under the condition of not less than the minimum limiting value ⁇ of A2.
  • the mobility parameter A2 of the target neighboring cell is less than -3 until the difference between the mobility parameter A2 of the adjusted target neighboring cell and the load balancing threshold A4 of the current cell.
  • the load of the current cell's preset cycle time is compared with the load balancing start threshold. If the load of the current cell's preset cycle time is higher than the load balancing start threshold, The mobility parameter of the target neighboring area of the current cell is restored, and the mobility parameters of all selected target neighboring areas for load balancing are restored.
  • the embodiment of the present invention may further provide a computer readable storage medium, where the computer program is stored, and when the program is executed by the processor, the foregoing steps S101 to S103 are implemented. Further, the recovery processing step after the above step S103 can also be implemented when the program or the instruction is executed by the processor.
  • the storage medium may be a ROM/RAM, a magnetic disk, an optical disk, a USB flash drive or the like.
  • FIG. 3 is a block diagram of an apparatus for adjusting mobility parameters according to an embodiment of the present invention. As shown in FIG. 3, FIG. 3 includes:
  • the screening module is configured to select a target neighboring area for load balancing according to the load condition of the current cell.
  • the module is used to compare the load of the current cell with the load balancing start threshold. If the load of the current cell is higher than the load balancing start threshold, the load is filtered from the same coverage neighboring area to be lower than the current cell.
  • One or more neighbors of the load act as target neighbors for load balancing.
  • a comparison module configured to compare the mobility parameter of the target neighboring cell with a load balancing threshold of the current cell, to obtain a comparison result.
  • the module is configured to compare the mobility parameters S NONINTRASEACH and A2 of the target neighboring cell with the load balancing A4 threshold of the current cell, respectively, and determine the mobility parameters S NONINTRASEACH and A2 of the target neighboring cell and the The difference of the load balancing A4 threshold of the current cell.
  • an adjustment module configured to adjust a mobility parameter of the target neighboring area according to the comparison result, specifically, to perform constraint adjustment on the mobility parameter of the target neighboring area.
  • the module is configured to: when the difference between the mobility parameter of the target neighboring cell and the load balancing threshold of the current cell is greater than or equal to a preset threshold (eg, -3), a condition that is not less than a minimum limit value of the mobility parameter.
  • the mobility parameter of the target neighboring area is continuously adjusted according to the automatic adjustment step, until the difference between the adjusted mobility parameter of the target neighboring cell and the load balancing threshold of the current cell is less than the preset threshold.
  • the lowest limit value of the mobility parameter S NONINTRASEACH of the target neighboring zone is ⁇
  • the lowest limit value of the mobility parameter A2 of the target neighboring zone is ⁇
  • the adjusted mobility parameter should be smaller than the corresponding minimum limit value.
  • the device further includes:
  • a recovery module configured to compare a load of the current cell's preset cycle time with a load balancing start threshold after adjusting the mobility parameter of the target neighbor according to the comparison result, and if If the load of the current cell's preset cycle time is higher than the load balancing start threshold, the mobility parameter of the target neighboring cell with the load higher than the current cell is restored, otherwise all selected loads are used for the load. The mobility parameters of the balanced target neighborhood are restored.
  • RRM Radio Resource Management
  • BBU base station baseband processing unit
  • the method and the device of the present invention can filter out the low-load cells in the same coverage neighboring area of the high-load cell, that is, the load-balanced target cell, when the load of the current cell is higher than a certain threshold.
  • the reference of the mobility parameter (A2, S NONINTRASEACH ) threshold of the target cell is compared with the (A4) threshold of the current cell load balancing.
  • the mobility parameter that produces ping-pong with equalization switching is then automatically adjusted under a security restriction, eliminating the risk of ping-pong switching and re-selection.
  • the present invention can eliminate User Equipment (UE) based on load and mobility ping-pong switching and reselection between cells.
  • UE User Equipment
  • the method can be used to maintain and optimize the effect generated by the load balancing function in the current commercial network, and avoid Unnecessary switching and reselection, which stabilizes indicators, networks, and user perception, is suitable for Long Term Evolution (LTE) systems.
  • LTE Long Term Evolution
  • FIG. 4 is a flowchart of adjusting mobility parameters in a load balancing scenario, which can prevent ping-pong switching and reselection based on load balancing and mobility. As shown in FIG. 4, specific implementation steps include:
  • Step (1) It is determined whether the load of the cell (that is, the current cell or the current cell) is higher than the start threshold of the equalization function (ie, the load balancing start threshold), that is, whether the load balancing function is started. If yes, go to step (2), otherwise go to step (15).
  • the start threshold of the equalization function ie, the load balancing start threshold
  • Step (2) screening the same coverage neighboring cell of the cell (ie, the current cell or the current cell), placing the same coverage neighboring cell whose load is lower than the local cell into the set N, and then performing step (3).
  • the above N is defined as a set of neighboring cells, and the same coverage neighboring cell with a lower load than the current cell joins the set, and another layer of the meaning is a target cell with load balancing.
  • Step (3) Determine the number of neighboring cells in the set N. If it is greater than or equal to 1, perform step (4), otherwise perform step (15).
  • Step (4) Acquire the mobility parameters SNONINTRASEACH and A2 values of the neighboring cells in the set N, and then perform step (5) and step (6) in parallel.
  • step (7) is performed.
  • T The value range of the above T is [-10, -1], for example, -1, -3, -7, -8, -9, -10, etc., and the embodiment takes -3 as an example.
  • is the minimum limit for automatically adjusting the value of S NONINTRASEACH .
  • a minimum value needs to be defined, which may be determined by the operator according to the actual situation. .
  • step (8) is performed.
  • is the minimum limit for automatically adjusting the value of A2. Below this value, the risk that the terminal does not switch in the weak field may occur. Therefore, it is necessary to define a minimum value, which may be determined by the operator according to the actual situation.
  • Step (7) the neighboring region S NONINTRASEACH - ⁇ satisfying the condition, and then performing step (9).
  • the difference between the mobility parameter S NONINTRASEACH of the neighboring cell and ⁇ is taken as the new mobility parameter S NONINTRASEACH of the neighboring cell .
  • Step (8) the neighboring area A2- ⁇ satisfying the condition, and then performing the step (10).
  • the difference between the mobility parameter A2 of the neighboring cell and ⁇ is taken as the new mobility parameter A2 of the neighboring cell.
  • Step (9) It is judged whether the step neighboring area S NONINTRASEACH - A4 is ⁇ T, if yes, step (11) is performed, otherwise step (5) is performed.
  • Step (10) Determine whether the neighboring area A2-A4 is ⁇ T, and if yes, perform step (11), otherwise perform step (6).
  • is the gain adjustment step, that is, the step size of the threshold is automatically adjusted each time, and the value is (1 to 10), and the default is 5 dB.
  • Step (11) The time period ⁇ ends, and step (12) is performed.
  • is the function operation cycle time, and the timing is started from the start of this function. After the cycle time arrives, the cell load level will be judged again to confirm whether it is necessary to roll back the mobility parameter of the neighboring cell. Usually set to 1 hour.
  • a load balancing start threshold ie, an equalization function start threshold
  • Step (13) Maintain the neighboring cells in the set N.
  • the neighboring area with the load lower than the current cell remains in the set N, the modified mobility parameter does not fall back; the neighboring area with the load higher than the current cell moves out of the set N, and the mobility parameter of the neighboring area modified before is rolled back Before the modification, then perform step (15).
  • Step (14) All neighboring cells are removed from the set N, and the previously modified mobility parameters of the neighboring cells are all restored to before the modification, and then step (15) is performed.
  • the S NONINTRASEACH is a signal threshold value defined in the TS 36.304 protocol. This parameter indicates the measurement trigger threshold of the inter-frequency/extra system of the cell reselection. If the UE currently receives a signal strength greater than S_nonintrasearch, measurements of other systems or carrier frequencies with priority equal to or lower than the current carrier priority are not performed, otherwise other systems with priority equal to or lower than the current carrier priority are performed or Carrier frequency measurement.
  • the A2 represents a signal threshold for triggering an A2 event, and the A2 event indicates that the UE receives the current cell signal quality below a certain threshold, and starts the inter-frequency/differential system measurement.
  • the A4 represents a signal threshold value for triggering the A4 event.
  • the A4 event indicates that the signal quality of the inter-frequency neighboring cell received by the UE is higher than a certain threshold, and is used to trigger the start of the inter-frequency handover request to the inter-frequency neighboring cell.
  • the invention considers the risk of ping-pong switching or re-selection generated after the load balancing function is turned on in the commercial network, constrains and automatically adjusts the key thresholds and mobility parameters of the load balancing function, consolidates the effect of the load balancing function, and avoids ping-pong switching and re-selection. Keep the indicators stable.
  • the technical solutions provided by the embodiments of the present invention can be applied to the field of communications technologies.
  • the technical solution provided by the embodiment of the present invention can eliminate the risk of ping-pong switching or re-selection generated after the load balancing function is enabled in the commercial network, thereby stabilizing the equalization effect, and the mobility of the network is eliminated due to elimination of a large number of ping-pong switching and re-selection.
  • the indicator has been stabilized.

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Abstract

本公开涉及一种移动性参数的调整方法及装置和计算机存储介质,涉及通信技术领域,所述方法包括:根据当前小区的负荷情况,选出用于负荷均衡的目标邻区;将所述目标邻区的移动性参数和当前小区的负载均衡门限进行比较,得到比较结果;根据比较结果,对所述目标邻区的移动性参数进行调整。本公开提供的技术方案能消除商用网络中负荷均衡功能开启后产生的乒乓切换或者重选的风险,从而稳定均衡效果,并且由于消除了大量的乒乓切换和重选,网络的移动性指标得以稳定。

Description

一种移动性参数的调整方法及装置和计算机存储介质 技术领域
本公开涉及通信技术领域,特别涉及一种移动性参数的调整方法及装置和计算机存储介质。
背景技术
负荷均衡指根据服务小区和其邻区负荷状态合理部署小区运行流量,平衡系统内小区间、频率间以及其它无线接入技术之间的负荷,从而可以有效地使用系统资源,以提高用户感知和系统的稳定性。
负荷均衡功能包括连接态负荷均衡(Load Balance,LB)及驻留态负荷均衡(Camp Load Balance,CLB)两部分。连接态负荷均衡主要针对连接态用户,通过切换的方式执行。驻留态负荷均衡主要针对连接态转空闲态的用户,通过重选(改变重选优先级)的方式执行。
图1是LB技术示意图,如图1所示。
商用现网宏站的小区与邻区并不一定有良好的重叠覆盖,考虑到均衡切换的成功率,外场一般采用基于测量的负荷均衡功能。将用户从高负荷小区切换到低负荷小区时,首先需要下发A4测量,测量邻区的信号覆盖情况,待用户上报目标小区的A4测量报告后,再发起切换。
由于负荷均衡的切换机制,用户均衡到低负荷目标小区后,需要防止该用户触发基于覆盖的切换再切回高负荷小区,另一方面,也需要避免该用户在目标小区释放后再重选回高负荷小区。所以当前小区和目标小区的切换/重选参数需要合理配置。负荷均衡和基于覆盖的切换/重选之间可能会出现乒乓现象,需要通过参数合理配置来进行抑制乒乓现象,否则将影响负荷均衡的效果。
目前,现网防止负荷均衡和基于覆盖的切换/重选之间出现乒乓的措施有以下4种:
1.基于乒乓切换保护定时器的切换抑制。目标小区针对切入用户设置乒乓切换保护定时器,定时器超时前不允许切入用户,包括基于覆盖及负荷的切入用户,执行基于覆盖的切换,回到源小区。
2.基于特殊A2事件的切换抑制。对于负荷均衡迁入的用户,目标小区在第一次A2事件测量重配中,给UE配置防止乒乓的A2Hys偏移值,同时启动防止乒乓A2事件定时器,使得定时器未超时前该由于负荷原因切换进入的UE较难满足A2事件。
3.配置的负荷均衡A4测量门限比切换的A2门限高,防止参数配置引起的乒乓。
4.配置的负荷均衡A4测量门限比异频重选的起测门限高,防止参数配置引起的 乒乓。
上述措施需要人工根据基站的参数设置来配置定时器或者门限。定时器超时则失效。而人工根据基站参数进行各门限配置,将给负荷均衡功能额外增加冗余的工作量。
也就是说,在目前的商用网络中,连接态的负荷均衡功能采用切换的方式将UE从高负荷小区迁移到低负荷小区内,这样存在UE基于覆盖的切换再切回高负荷小区或者释放后再重选回高负荷小区的情况,导致负荷均衡效果不能保持且产生大量无意义的切换和重选,影响网络稳定。本发明就是为了解决上述实际网络问题。
发明内容
根据本发明实施例提供的一种移动性参数的调整方法及装置,解决负荷均衡功能开启后的乒乓切换和重选问题。
根据本发明实施例提供的一种移动性参数的调整方法,包括:
根据当前小区的负荷情况,选出用于负荷均衡的目标邻区;
将所述目标邻区的移动性参数和当前小区的负荷均衡门限进行比较,得到比较结果;
根据比较结果,对所述目标邻区的移动性参数进行调整。
根据一个示例性实施例,所述的根据当前小区的负荷情况,选出用于负荷均衡的目标邻区包括:
将所述当前小区的负荷与负荷均衡启动门限进行比较;
若所述当前小区的负荷高于所述负荷均衡启动门限,则从同覆盖邻区中筛选出负荷低于所述当前小区负荷的邻区作为用于负荷均衡的目标邻区。
根据一个示例性实施例,所述的将所述目标邻区的移动性参数和当前小区的负荷均衡门限进行比较,得到比较结果包括:
通过比较所述目标邻区的移动性参数与所述当前小区的负荷均衡门限,确定所述目标邻区的移动性参数与所述当前小区的负荷均衡门限的差值。
根据一个示例性实施例,所述的根据比较结果,对所述目标邻区的移动性参数进行调整包括:
当所述目标邻区的移动性参数与所述当前小区的负荷均衡门限的差值大于或等于预设阈值时,在不小于移动性参数最低限制值的条件下,按照自动调整步长不断调整所述目标邻区的移动性参数,直至调整后的目标邻区的移动性参数与所述当前小区的负荷均衡门限的差值小于所述预设阈值。
根据一个示例性实施例,在所述的根据比较结果,对所述目标邻区的移动性参数进行调整之后,所述方法进一步包括:
将所述当前小区的预设周期时间到达时的负荷与负荷均衡启动门限进行比较;
若所述当前小区的预设周期时间到达时的负荷高于负荷均衡启动门限,则将负荷 高于所述当前小区的目标邻区的移动性参数进行恢复处理,否则将所有选出的用于负荷均衡的目标邻区的移动性参数进行恢复处理。
根据本发明实施例提供的存储介质,其存储用于实现上述移动性参数的调整方法的程序。
根据本发明实施例提供的一种移动性参数的调整装置,包括:
筛选模块,用于根据当前小区的负荷情况,选出用于负荷均衡的目标邻区;
比较模块,用于将所述目标邻区的移动性参数和当前小区的负荷均衡门限进行比较,得到比较结果;
调整模块,用于根据比较结果,对所述目标邻区的移动性参数进行调整。
根据一个示例性实施例,所述筛选模块用于将所述当前小区的负荷与负荷均衡启动门限进行比较,若所述当前小区的负荷高于所述负荷均衡启动门限,则从同覆盖邻区中筛选出负荷低于所述当前小区负荷的邻区作为用于负荷均衡的目标邻区。
根据一个示例性实施例,所述比较模块用于通过比较所述目标邻区的移动性参数与所述当前小区的负荷均衡门限,确定所述目标邻区的移动性参数与所述当前小区的负荷均衡门限的差值。
根据一个示例性实施例,所述调整模块用于在所述目标邻区的移动性参数与所述当前小区的负荷均衡门限的差值大于或等于预设阈值时,在不小于移动性参数最低限制值的条件下,按照自动调整步长不断调整所述目标邻区的移动性参数,直至调整后的目标邻区的移动性参数与所述当前小区的负荷均衡门限的差值小于所述预设阈值。
根据一个示例性实施例,所述移动性参数的调整装置进一步包括:
恢复模块,用于在所述的根据比较结果,对所述目标邻区的移动性参数进行调整之后,将所述当前小区的预设周期时间到达时的负荷与负荷均衡启动门限进行比较,若所述当前小区的预设周期时间到达时的负荷高于负荷均衡启动门限,则将负荷高于所述当前小区的目标邻区的移动性参数进行恢复处理,否则将所有选出的用于负荷均衡的目标邻区的移动性参数进行恢复处理。
本发明还提供一种计算机存储介质,所述计算机存储介质中存储有计算机可执行的一个或多个程序,所述一个或多个程序被所述计算机执行时使所述计算机执行上述的移动性参数的调整方法。
本发明实施例提供的技术方案具有如下有益效果:
与现有技术相比,本发明能够消除商用网络中负荷均衡功能开启后产生的乒乓切换或者重选的风险,从而稳定均衡效果,并且由于消除了大量的乒乓切换和重选,网络的移动性指标得以稳定。
附图说明
图1是LB技术示意图;
图2是本发明实施例提供的移动性参数的调整方法框图;
图3是本发明实施例提供的移动性参数的调整装置框图;
图4是负荷均衡场景下移动性参数的调整流程图。
具体实施方式
以下结合附图对本发明的优选实施例进行详细说明,应当理解,以下所说明的优选实施例仅用于说明和解释本发明,并不用于限定本发明。
图2是本发明实施例提供的移动性参数的调整方法框图,如图2所示,步骤包括:
步骤S101:根据当前小区的负荷情况,选出用于负荷均衡的目标邻区。
步骤S101包括:将所述当前小区的负荷与负荷均衡启动门限进行比较,若所述当前小区的负荷高于所述负荷均衡启动门限,则从同覆盖邻区中筛选出负荷低于所述当前小区负荷的邻区,作为用于负荷均衡的目标邻区,目标邻区可以有一个或多个,所选出的目标邻区放入集合N中。
步骤S102:将所述目标邻区的移动性参数和当前小区的负荷均衡门限进行比较,得到比较结果。
步骤S102包括:通过比较所述目标邻区的移动性参数与所述当前小区的负荷均衡门限,确定所述目标邻区的移动性参数与所述当前小区的负荷均衡门限的差值。其中,所述目标邻区的移动性参数包括SNONINTRASEACH和A2,所述当前小区的负荷均衡门限指负荷均衡A4门限。也就是说,需要将目标邻区的移动性参数SNONINTRASEACH和A2分别与当前小区的负荷均衡A4门限进行比较。
步骤S103:根据比较结果,对所述目标邻区的移动性参数进行调整,具体地说,对所述目标邻区的移动性参数进行有约束性的调整。
步骤S103包括:当所述目标邻区的移动性参数与所述当前小区的负荷均衡门限的差值大于或等于预设阈值时,在不小于移动性参数最低限制值的条件下,按照自动调整步长不断调整所述目标邻区的移动性参数,直至调整后的目标邻区的移动性参数与所述当前小区的负荷均衡门限的差值小于所述预设阈值。其中,所述预设阈值的可选范围为[-10,-1],例如可选-3、-4、-5、-6等,优选-3。以预设阈值选取-3为例,当目标邻区的移动性参数SNONINTRASEACH与当前小区的负荷均衡A4门限的差值大于或等于-3时,在不小于SNONINTRASEACH最低限制值α的条件下,按照自动调整步长Δ不断调整所述目标邻区的移动性参数SNONINTRASEACH,直至调整后的目标邻区的移动性参数SNONINTRASEACH与所述当前小区的负荷均衡门限A4的差值小于-3。同样地,当目标邻区的移动性参数A2与当前小区的负荷均衡A4门限的差值大于或等于-3时,在不小于A2最低限制值β的条件下,按照自动调整步长Δ不断调整所述目标邻区的移动性参数A2,直至调整后的目标邻区的移动性参数A2与所述当前小区的负荷均衡门限A4的差值小于-3。
在步骤S103之后,将所述当前小区的预设周期时间到达时的负荷与负荷均衡启动门限进行比较,若所述当前小区的预设周期时间到达时的负荷高于负荷均衡启动门限,则将负荷高于所述当前小区的目标邻区的移动性参数进行恢复处理,否则将所有选出的用于负荷均衡的目标邻区的移动性参数进行恢复处理。
本领域普通技术人员可以理解,实现上述实施例方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成,所述的程序可以存储于计算机可读取存储介质中。也就是说,本发明实施例还可以提供一种计算机可读存储介质,其上存储有计算机程序,该程序被处理器执行时实现上述步骤S101至步骤S103。进一步地,该程序或指令被处理器执行时还可以实现上述步骤S103之后的恢复处理步骤。其中,所述的存储介质可以为ROM/RAM、磁盘、光盘、U盘等。
图3是本发明实施例提供的移动性参数的调整装置框图,如图3所示,包括:
筛选模块,用于根据当前小区的负荷情况,选出用于负荷均衡的目标邻区。该模块用于所述当前小区的负荷与负荷均衡启动门限进行比较,若所述当前小区的负荷高于所述负荷均衡启动门限,则从同覆盖邻区中筛选出负荷低于所述当前小区负荷的一个或多个邻区作为用于负荷均衡的目标邻区。
比较模块,用于将所述目标邻区的移动性参数和当前小区的负荷均衡门限进行比较,得到比较结果。该模块用于将所述目标邻区的移动性参数SNONINTRASEACH和A2分别与所述当前小区的负荷均衡A4门限进行比较,并确定所述目标邻区的移动性参数SNONINTRASEACH和A2与所述当前小区的负荷均衡A4门限的差值。
调整模块,用于根据比较结果,对所述目标邻区的移动性参数进行调整,具体地说,对所述目标邻区的移动性参数进行约束性调整。该模块用于在所述目标邻区的移动性参数与所述当前小区的负荷均衡门限的差值大于或等于预设阈值(例如-3)时,在不小于移动性参数最低限制值的条件下,按照自动调整步长不断调整所述目标邻区的移动性参数,直至调整后的目标邻区的移动性参数与所述当前小区的负荷均衡门限的差值小于所述预设阈值。其中,目标邻区的移动性参数SNONINTRASEACH的最低限制值为α,目标邻区的移动性参数A2的最低限制值为β,调整后的移动性参数应小于相应的最低限制值。
所述装置进一步包括:
恢复模块,用于在所述的根据比较结果,对所述目标邻区的移动性参数进行调整之后,将所述当前小区的预设周期时间到达时的负荷与负荷均衡启动门限进行比较,若所述当前小区的预设周期时间到达时的负荷高于负荷均衡启动门限,则将负荷高于所述当前小区的目标邻区的移动性参数进行恢复处理,否则将所有选出的用于负荷均衡的目标邻区的移动性参数进行恢复处理。
上述装置均由基站基带处理单元(BBU)的无线资源管理(Radio Resource Management,RRM)模块实现。
本发明的方法及装置能够在当前小区的负荷高于某个门限的时,筛选出高负荷小区的同覆盖邻区中的低负荷小区,即负荷均衡的目标小区。将目标小区的移动性参数(A2、SNONINTRASEACH)门限与当前小区负荷均衡的(A4)门限进行比较参照。然后将与均衡切换产生乒乓的移动性参数在一个安全限制下进行自动调整,消除乒乓切换和重选的风险。本发明能够消除用户设备(User Equipment,UE)在小区间基于负荷和移动性乒乓切换和重选,具体地说,该方法可用于保持和优化目前商用网络中负荷均衡功能产生的效果,并且避免不必要的切换和重选,进而稳定指标、网络,以及用户感知度,适用于长期演进(Long Term Evolution,LTE)系统。
图4是负荷均衡场景下移动性参数的调整流程图,能够防止基于负荷均衡和移动性的乒乓切换及重选的,如附图4所示,具体实施步骤包括:
步骤(1):判断小区(即本小区或当前小区)的负荷是否高于均衡功能启动门限(即负荷均衡启动门限),即是否启动负荷均衡功能。是则执行步骤(2),否则执行步骤(15)。
步骤(2):筛选小区(即本小区或当前小区)的同覆盖邻区,将其中负荷低于本小区的同覆盖邻区放入集合N,然后执行步骤(3)。
上述N定义为邻区的集合,负荷低于当前小区的同覆盖邻区加入这个集合,它的另外一层含义是负荷均衡的目标小区。
步骤(3):判断集合N中的邻区数目,若大于或者等于1则执行步骤(4),否则执行步骤(15)。
步骤(4):获取集合N中邻小区的移动性参数SNONINTRASEACH和A2值,然后并行执行步骤(5)和步骤(6)。
步骤(5):判断邻区的移动性参数SNONINTRASEACH减去当前小区的负荷均衡A4门限值是否>=预设阈值T,并且判断邻区的移动性参数SNONINTRASEACH的值是否>α+Δ。若两个条件同时满足则执行步骤(7),否则执行步骤(15)。
也就是说,同时满足SNONINTRASEACH-A4>=T和SNONINTRASEACH>α+Δ时,执行步骤(7)。
上述T的取值范围为[-10,-1],例如可选-1、-3、-7、-8、-9、-10等,本实施例以-3为例。
上述α是自动调整SNONINTRASEACH取值的最低限制,低于此值可能会产生终端在弱场驻留却不重选的风险,所以需要限定一个最小值,具体可根据实际情况由运营商定值。
步骤(6):判断邻区的移动性参数A2门限值减去本小区的负荷均衡A4门限值是否>=T,并且判断邻区的A2的值是否>β+Δ。若两个条件同时满足则执行步骤(8),否则执行步骤(15)。
也就是说,同时满足A2-A4>=T和A2>β+Δ时,执行步骤(8)。
上述β是自动调整A2取值的最低限制,低于此值可能会产生终端在弱场不切换的风险,所以需要限定一个最小值,具体可根据实际情况由运营商定值。
步骤(7):满足条件的邻区SNONINTRASEACH-Δ,然后执行步骤(9)。
也就是说,将邻区的移动性参数SNONINTRASEACH与Δ的差作为邻区的新的移动性参数SNONINTRASEACH
步骤(8):满足条件的邻区A2-Δ,然后执行步骤(10)。
也就是说,将邻区的移动性参数A2与Δ的差作为邻区的新的移动性参数A2。
步骤(9):判断步骤邻区SNONINTRASEACH-A4是否<T,若是则执行步骤(11),否则执行步骤(5)。
步骤(10):判断邻区A2-A4是否<T,若是,则执行步骤(11),否则执行步骤(6)。
上述Δ是增益调整步长,即门限每次自动调整的步长,取值为(1~10),默认为5dB。
步骤(11):时间周期λ结束,执行步骤(12)。
上述λ是功能运行周期时间,从本功能启动开始计时。周期时间到达后,将再次判断小区负荷的高低,以便确认是否需要回退邻区的移动性参数。一般设置为1小时。
步骤(12):判断小区的负荷是否高于负荷均衡启动门限(即均衡功能启动门限),若是,则执行步骤(13),否则执行步骤(14)。
步骤(13):对集合N中的邻区进行维护。负荷低于当前小区的邻区保留在集合N中,修改的移动性参数不回退;负荷高于当前小区的邻区移出集合N,并将在前修改的该邻区的移动性参数回退到修改前,然后执行步骤(15)。
步骤(14):所有邻区都从集合N中移出,并且将邻区的在前修改的移动性参数全部还原到修改前,然后执行步骤(15)。
步骤(15):流程结束。
其中,所述SNONINTRASEACH为TS 36.304协议中定义的一个信号门限值。该参数指示了小区重选的异频/异系统的测量触发门限。如果UE当前收到信号强度大于S_nonintrasearch,则不执行优先级等于或低于当前载频优先级的其它系统或载频的测量,否则进行优先级等于或低于当前载频优先级的其它系统或载频的测量。
其中,所述A2代表触发A2事件的信号门限值,所述A2事件表示UE收到当前小区信号质量低于一定门限,启动异频/异系统测量。
其中,所述A4代表触发A4事件的信号门限值。所述A4事件表示UE收到的异频邻区信号质量高于一定门限,用于触发向异频邻区启动异频切换请求。
综上所述,本发明的实施例具有以下技术效果:
本发明考虑商用网络中负荷均衡功能开启后产生的乒乓切换或者重选的风险,对负荷均衡功能关键门限和移动性参数进行约束并且自动调整,巩固负荷均衡功能的效果,避免乒乓切换和重选,保持指标稳定。
尽管上文对本发明进行了详细说明,但是本发明不限于此,本技术领域技术人员可以根据本发明的原理进行各种修改。因此,凡按照本发明原理所作的修改,都应当理解为落入本发明的保护范围。
工业使用性
本发明实施例提供的技术方案可以应用于通信技术领域。采用本发明实施例提供的技术方案能够消除商用网络中负荷均衡功能开启后产生的乒乓切换或者重选的风险,从而稳定均衡效果,并且由于消除了大量的乒乓切换和重选,网络的移动性指标得以稳定。

Claims (11)

  1. 一种移动性参数的调整方法,包括:
    根据当前小区的负荷情况,选出用于负荷均衡的目标邻区;
    将所述目标邻区的移动性参数和当前小区的负荷均衡门限进行比较,得到比较结果;
    根据比较结果,对所述目标邻区的移动性参数进行调整。
  2. 根据权利要求1所述的方法,其中,所述的根据当前小区的负荷情况,选出用于负荷均衡的目标邻区包括:
    将所述当前小区的负荷与负荷均衡启动门限进行比较;
    若所述当前小区的负荷高于所述负荷均衡启动门限,则从同覆盖邻区中筛选出负荷低于所述当前小区负荷的邻区作为用于负荷均衡的目标邻区。
  3. 根据权利要求2所述的方法,其中,所述的将所述目标邻区的移动性参数和当前小区的负荷均衡门限进行比较,得到比较结果包括:
    通过比较所述目标邻区的移动性参数与所述当前小区的负荷均衡门限,确定所述目标邻区的移动性参数与所述当前小区的负荷均衡门限的差值。
  4. 根据权利要求3所述的方法,其中,所述的根据比较结果,对所述目标邻区的移动性参数进行调整包括:
    当所述目标邻区的移动性参数与所述当前小区的负荷均衡门限的差值大于或等于预设阈值时,在不小于移动性参数最低限制值的条件下,按照自动调整步长不断调整所述目标邻区的移动性参数,直至调整后的目标邻区的移动性参数与所述当前小区的负荷均衡门限的差值小于所述预设阈值。
  5. 根据权利要求2-4任意一项所述的方法,在所述的根据比较结果,对所述目标邻区的移动性参数进行调整之后,所述方法进一步包括:
    将所述当前小区的预设周期时间到达时的负荷与负荷均衡启动门限进行比较;
    若所述当前小区的预设周期时间到达时的负荷高于负荷均衡启动门限,则将负荷高于所述当前小区的目标邻区的移动性参数进行恢复处理,否则将所有选出的用于负荷均衡的目标邻区的移动性参数进行恢复处理。
  6. 一种移动性参数的调整装置,包括:
    筛选模块,设置为根据当前小区的负荷情况,选出用于负荷均衡的目标邻区;
    比较模块,设置为将所述目标邻区的移动性参数和当前小区的负荷均衡门限进行比较,得到比较结果;
    调整模块,设置为根据比较结果,对所述目标邻区的移动性参数进行调整。
  7. 根据权利要求6所述的装置,其中,所述筛选模块设置为将所述当前小区的负荷与负荷均衡启动门限进行比较,若所述当前小区的负荷高于所述负荷均衡启动门限,则从同覆盖邻区中筛选出负荷低于所述当前小区负荷的邻区作为用于负荷均 衡的目标邻区。
  8. 根据权利要求7所述的装置,其中,所述比较模块设置为通过比较所述目标邻区的移动性参数与所述当前小区的负荷均衡门限,确定所述目标邻区的移动性参数与所述当前小区的负荷均衡门限的差值。
  9. 根据权利要求8所述的装置,其中,所述调整模块设置为在所述目标邻区的移动性参数与所述当前小区的负荷均衡门限的差值大于或等于预设阈值时,在不小于移动性参数最低限制值的条件下,按照自动调整步长不断调整所述目标邻区的移动性参数,直至调整后的目标邻区的移动性参数与所述当前小区的负荷均衡门限的差值小于所述预设阈值。
  10. 根据权利要求7-9任意一项所述的装置,进一步包括:
    恢复模块,设置为在所述的根据比较结果,对所述目标邻区的移动性参数进行调整之后,将所述当前小区的预设周期时间到达时的负荷与负荷均衡启动门限进行比较,若所述当前小区的预设周期时间到达时的负荷高于负荷均衡启动门限,则将负荷高于所述当前小区的目标邻区的移动性参数进行恢复处理,否则将所有选出的用于负荷均衡的目标邻区的移动性参数进行恢复处理。
  11. 一种计算机存储介质,所述计算机存储介质中存储有计算机可执行的一个或多个程序,所述一个或多个程序被所述计算机执行时使所述计算机执行如根据权利要求1-5中任一项所述的移动性参数的调整方法。
PCT/CN2017/106874 2017-05-11 2017-10-19 一种移动性参数的调整方法及装置和计算机存储介质 WO2018205501A1 (zh)

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