WO2011157082A1 - 功率过载控制方法及基站 - Google Patents
功率过载控制方法及基站 Download PDFInfo
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- WO2011157082A1 WO2011157082A1 PCT/CN2011/073472 CN2011073472W WO2011157082A1 WO 2011157082 A1 WO2011157082 A1 WO 2011157082A1 CN 2011073472 W CN2011073472 W CN 2011073472W WO 2011157082 A1 WO2011157082 A1 WO 2011157082A1
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- base station
- threshold
- time interval
- power
- overload
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W52/00—Power management, e.g. TPC [Transmission Power Control], power saving or power classes
- H04W52/04—TPC
- H04W52/30—TPC using constraints in the total amount of available transmission power
- H04W52/34—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading
- H04W52/343—TPC management, i.e. sharing limited amount of power among users or channels or data types, e.g. cell loading taking into account loading or congestion level
Definitions
- the present invention relates to the field of communications, and in particular to a power overload control method and a base station.
- the forward transmit power of a base station in a mobile system is fixed, and all mobile communication users share power resources.
- the base station allocates corresponding power resources to users in the process of mobile user communication to meet the requirements of the forward link.
- the user can receive the information of the base station.
- the base station When the wireless environment in which the user is located is poor, in order to offset the strong interference and fading caused by the forward wireless environment, the base station correspondingly increases the power allocated to the user, and vice versa.
- the forward signal is less disturbed and the fading is small, and the power allocated by the base station to the user is reduced. Therefore, the use of the forward power of the base station is greatly related to the wireless environment of the user.
- the power resources are shared among users, the more power the user consumes, the larger the power resources. It can be seen that, under the premise that the radio frequency power of the base station is fixed, the user's wireless environment and the number of users are important factors affecting the power usage rate, and the total transmit power of the base station depends on the configuration of the power amplifier. When the power amplifier is configured, the transmit power is basically It is fixed, usually called rated power.
- the total forward transmit power of the base station increases.
- the system equipment is operated in a non-optimal state or even an abnormal state, such as a power amplifier shutdown.
- the system is unable to communicate, and the forward transmit power is too large, and the interference to adjacent frequency bands is also increased, which affects the voice quality.
- a variety of power control methods are provided in the related art. In the same cycle, access and handover are restricted according to different overload levels, which reduces the capacity of the system; according to the overload level, the service call is directly removed to quickly converge power.
- a primary object of the present invention is to provide a power overload control method and a base station to solve at least the above problems.
- a power overload control method is provided.
- the power overload control method includes: the base station adjusts an upper limit of the user power of the base station at a first time interval, a forward power of the base station, and a threshold of the first time interval; the base station uses the second time interval to The forward power of the base station and the threshold of the second time interval are used to remove the data service under the base station; the base station performs the admission control on the service under the base station according to the forward power of the base station and the threshold of the third time interval at the third time interval.
- the first time interval ⁇ the second time interval ⁇ the third time interval, and the threshold of the second time interval is less than the threshold of the third time interval.
- the base station adjusts the upper limit of the user power of the base station according to the forward power of the base station and the threshold of the first time interval at the first time interval, including: setting the overload threshold of the one or more first time intervals and the corresponding decrease of the overload threshold Step; if the forward power is greater than the minimum value of the overload threshold, determine the overload threshold closest to the forward power, and reduce the upper limit of the user power under the base station, and the falling amplitude is the falling step corresponding to the closest overload threshold; If the power is less than all overload thresholds, the upper limit of the user power under the base station is restored to the initial value set by the system.
- the method further includes: setting an idle threshold and an ascending step corresponding to the idle threshold, where the idle threshold is less than a minimum value of the overload threshold; if the forward power is less than the idle threshold, adjusting the user power of the base station to an initial setting of the system The sum of the value and the rising step size.
- the base station removes the data service under the base station according to the forward power of the base station and the threshold of the second time interval at the second time interval, including: if the forward power of the base station is greater than the threshold of the second time interval, determining the data under the base station Whether the total power of the service exceeds the amount of resources allocated by the system; if the judgment result is yes, the channel of the user who occupies the largest resource in the data service under the base station is removed.
- the receiving control of the service under the base station by the base station at the third time interval according to the forward power of the base station and the threshold of the third time interval includes: determining whether the forward power of the base station is greater than a threshold of the third time interval; If yes, the access or handover of the user under the base station is restricted.
- a base station is provided.
- the base station includes: an adjustment module, configured to adjust an upper limit of user power of the base station according to a forward power of the base station and a threshold of the first time interval at a first time interval; and the module is removed, and is set to be at a second time interval, Deleting the data service under the base station according to the forward power of the base station and the threshold of the second time interval; the admission control module is set to be at a third time interval, according to the forward power of the base station and the threshold of the third time interval The service under the base station performs admission control, where the first time interval ⁇ the second time interval ⁇ the third time interval, and the threshold of the second time interval is less than the threshold of the third time interval.
- the adjustment module comprises: a first setting module, configured to set one or more overload thresholds of the first time interval and a falling step corresponding to the overload threshold; and the determining module is set to a minimum value of the forward power greater than the overload threshold, before determining The power-to-power overload threshold; the step-down module is set to reduce the upper limit of the user power under the base station, and the drop is the falling step corresponding to the closest overload threshold; the recovery module is set to forward power less than all overload thresholds Then, the upper limit of the user power under the base station is restored to the initial value set by the system.
- the adjustment module further includes: a second setting module, configured to set an idle threshold and an ascending step corresponding to the idle threshold, wherein the idle threshold is less than a minimum value of the overload threshold; and the step increasing module is set to forward power less than an idle threshold, Then, the user power under the base station is adjusted to the sum of the initial value set by the system and the rising step.
- the removal module includes: a first determining module, configured to determine whether the total power of the data service under the base station exceeds the resource allocated by the system when the forward power of the base station is greater than the threshold of the second time interval; the channel removal module is set to the first judgment When the judgment result of the module is YES, the channel of the user who occupies the largest resource in the data service under the base station is removed.
- the admission control module includes: a second determining module, configured to determine whether the forward power of the base station is greater than a threshold of the third time interval; and the limiting module, when the determining result of the second determining module is yes, restricting access of the user under the base station Or switch.
- the base station adjusts the upper limit of the user power of the base station according to the forward power of the base station and the threshold of the first time interval at the first time interval; the base station uses the forward power of the base station at the second time interval.
- the threshold of the second time interval is used to remove the data service under the base station; the base station performs the admission control of the service under the base station according to the forward power of the base station and the threshold of the third time interval at the third time interval, and solves the present In the technology, the power overload control has a great influence on the stability of the system, and the overload control is effectively realized.
- FIG. 1 is a flow chart of a power overload control method according to an embodiment of the present invention
- FIG. 2 is a flow chart 1 of a power overload control method according to a preferred embodiment of the present invention
- FIG. 3 is a preferred embodiment of the present invention.
- FIG. 4 is a block diagram showing the structure of a base station according to an embodiment of the present invention.
- FIG. 1 is a flowchart of a power overload control method according to an embodiment of the present invention. As shown in FIG. 1, the method includes: Step S102: The base station uses a first time interval according to a base station.
- Step 4 gathers S 104, and the base station uses the threshold of the forward power and the second time interval of the base station to the base station at the second time interval.
- the data service is removed;
- the step 4 is S 106, and the base station performs admission control on the service under the base station according to the forward power of the base station and the threshold of the third time interval at a third time interval, where the first time interval is The second time interval ⁇ the third time interval, the threshold of the second time interval is smaller than the threshold of the third time interval.
- a plurality of power control methods in the related art limit access and handover according to different overload levels in the same cycle, which reduces the capacity of the system; according to the overload level, the service call is directly removed to quickly converge power, but Affects the call drop rate, especially for voice service users, the user feels poor; the user's power is limited to different thresholds according to the overload level, when the system power is maintained between two overload levels for a long time, the system The overload state can not be alleviated for a long time.
- the upper limit adjustment of the user power, the data service teardown and the admission control are respectively performed in different periods, and the carrier power control is effectively guaranteed.
- step S102 includes: setting an overload threshold of one or more first periods and a falling step corresponding to an overload threshold; if the forward power is greater than a minimum value of the overload threshold, determining an overload threshold closest to the forward power, And reducing the upper limit of the user power under the base station, the falling range is the falling step corresponding to the closest overload threshold; if the forward power is less than the all overload threshold, the upper limit of the user power under the base station is restored to the initial value set by the system. .
- the power of the fan is greater than the overload threshold N1
- the corresponding step is taken according to the corresponding overload threshold.
- the larger the serious step the higher the upper limit of the power of the fan is dynamically adjusted.
- the power usage of the carrier fan is adaptively determined to dynamically drop and restore the upper limit of the user power, so that when the number of system users is large, the power utilization rate is maintained at a high level, and the number of system users is small.
- the power can be allocated to the users in need, thereby improving the power utilization of the system as a whole.
- the power limit is gradually adjusted by the step size, so that the power variation is relatively stable.
- the user who sacrifices the power by lowering the threshold guarantees the rest.
- the quality of the call for most users is controlled by overload within a short period of time. For example, in 20ms, it can respond to the change of forward power in real time, realize overload control in time and effectively, and avoid overload control delay.
- the step S102 further includes: setting an idle threshold and a rising step corresponding to the idle threshold, where the idle threshold is smaller than a minimum value of the overload threshold; if the forward power is smaller than the idle threshold,
- the user power under the base station is adjusted to be the sum of the initial value set by the system and the rising step size.
- the carrier fan has an idle threshold T1 (T N1 ) corresponding to the rising step si. When the power of the fan is less than the idle threshold T1, the upper threshold of the user power is raised to the user in need.
- the user power threshold is dynamically increased by adaptively determining the power usage of the carrier fan, so that when the number of system users is small, the power can be allocated to the user in need, thereby improving the power utilization of the system as a whole.
- the upper limit is adjusted in a continuous period, but if the upper limit after multiple adjustments is smaller than the given upper limit protection value, it is not adjusted.
- the step S104 includes: if the forward power of the base station is greater than the threshold of the second period, determining whether the total power of the data service under the base station exceeds the resource allocated by the system; if the determination result is yes, the data service under the base station is removed. The channel of the user who occupies the most resources.
- the power of the fan in the period Y is filtered to determine whether the power reaches the overload threshold M1.
- the threshold it is determined whether the resource occupied by the data service user exceeds the pre-allocated resource total Ps. If yes, remove the data user with the highest power, and vice versa.
- the data user is periodically removed, so that the power can be rapidly decreased, and the user's power can not be alleviated in a short period due to more users, and the data user is taken into consideration when the data user is removed. It is fair to the voice and data users in the system. It does not sacrifice data users, and reserves the resources of the data users.
- the step S106 includes: determining whether the forward power of the base station is greater than a threshold of the third period; if the determination result is yes, limiting access or handover of the user under the base station.
- the admission control of the service is implemented. When the user frequently causes frequent power overload, the admission control is started, and the access and handover are gradually restricted, thereby ensuring that the overload degree of the system is not further introduced by introducing a new user. Deterioration, as far as possible to ensure system performance, try to maintain the call of existing system users.
- the overload control period is X, and there are two overload control thresholds, N1, N2 and 0 ⁇ N1 ⁇ N2, corresponding descending step sizes dl, d2 JL 0 ⁇ dl ⁇ d2, Idle threshold Tl, JL TKN1, corresponding rising step size sl.
- 2 is a flowchart 1 of a power overload control method according to a preferred embodiment of the present invention. As shown in FIG. 2, the method includes the following steps: Step S202: Acquire a base station forward total power by using a period X. For example, each period X reads the base station forward power to Ptotal. In step S204, it is determined whether the forward total power of the base station is greater than the overload threshold.
- step 4 is performed, and if the result of the determination is no, step S208 is performed.
- step S206 the corresponding step size is found according to the overload threshold, and the user power threshold is lowered. For example, if Ptotal>N2, the descending step is d2, and the descending step is dl. Step S208, restoring the user power upper limit to the initial value set by the system.
- Step S210 determining whether the total power is less than idle Threshold, if the result of the determination is yes, step S212 is performed, and if the result of the determination is no, step S202 is performed. Step S212, increasing the upper threshold of the user power, and the lifting range is a rising step.
- Step 4 S214, determining whether the user power threshold is less than a given upper limit protection value. If the determination result is yes, step S216 is performed, and if the determination result is no, step S202 is performed.
- the adjustment user power threshold (upper limit) is equal to the upper limit protection value.
- the supplementary channel removal period is Y
- the supplementary channel removal threshold is M1
- the admission control period is Z
- the admission control overload threshold is M2, M3, and M1 ⁇ M2 ⁇ M3, data service reservation
- the resource is Ps
- the access is controlled when the overload reaches the threshold M2, and the switch is restricted when the M3 is reached.
- FIG. 3 is a second flowchart of a power overload control method according to a preferred embodiment of the present invention. As shown in FIG.
- Step S302 Acquire a base station forward power by using a period X.
- Step 4 gathers S304, and cycle Y acquires the filtered forward power in period Y. For example, each period ⁇ , filtering the power of Y/X cycles, and the filtering mode can be selected at will, for example, the simplest averaging power of Y/X cycles is Paverage_l.
- step S306 it is determined whether the total power is greater than the data service demolition threshold. If the determination result is yes, the process proceeds to step 4, S308. If the determination result is no, the process proceeds to step S302. For example: Paverage_l>Ml, go to step S308, if the judgment result is no, enter the step
- Step S302 it is determined whether the total power occupied by the data user is greater than the reserved resource. If the determination result is yes, the process proceeds to step S310.
- Step S310 the supplementary channel of the data user occupying the most resources among the data users is removed. For example: If the total data user power Pdatauser>Ps, select one of the data users with the highest power consumption, and remove the supplementary channel of the user.
- Step S312 the period Z acquires the filtered forward power in the period Z. For example: For each period Z, filter the power of Z/X cycles. For example, the filtering method is averaging, and the filtered power is Paverage_2. In step S314, it is determined whether the total power is greater than the admission control threshold.
- step 4 the process proceeds to step 4 to gather S316. If the determination result is negative, the process proceeds to step 4 to gather S312. For example: Paverage_2>M2, indicating that it is greater than the admission control threshold, and proceeds to step 4 to S316. If the result of the determination is no, the process proceeds to step S312. Step S316, extracting corresponding control measures according to the admission control threshold, and controlling access and control switching. For example: M2 ⁇ Paverage_2 ⁇ M3, which restricts access for new users; Paverage_2>M3 restricts access between new users and users.
- 4 is a structural block diagram of a base station according to an embodiment of the present invention. As shown in FIG.
- the method includes: an adjustment module 42, a removal module 44, and a admission control module 46.
- an adjustment module 42 is set to Adjusting, by the first time interval, the forward power of the base station and the threshold of the first time interval to adjust an upper limit of the user power of the base station;
- the removal module 44 is connected to the adjustment module 42 and configured to remove the data service under the base station according to the forward power of the base station and the threshold of the second time interval at a second time interval;
- the admission control module 46 is connected to the removal module 44.
- FIG. 5 is a block diagram of a preferred structure of a base station according to an embodiment of the present invention.
- the adjustment module 42 includes: a first setting module 422, a determining module 424, a step down module 426, a recovery module 427, and a second setting.
- the module 428, the step-up module 429, and the removal module 44 include: a first determining module 442 and a channel removing module 444.
- the receiving control module 46 includes: a second determining module 462 and a limiting module 464.
- the adjustment module 42 includes: a first setting module 422, configured to set an overload threshold of the one or more first time intervals and a falling step corresponding to the overload threshold; the determining module 424 is connected to the first setting module 422, and is set to the front The power threshold is greater than the minimum value of the overload threshold set by the first setting module 422, and the overload threshold closest to the forward power is determined; the step-down module 426 is connected to the determining module 424, and is set to lower the upper limit of the user power under the base station.
- the determining module 424 determines the step size corresponding to the closest overload threshold; the recovery module 427 is connected to the first setting module 422, and is set to set the forward power to be less than the first setting module 422 to set all overload thresholds, and then the user power under the base station The upper limit is restored to the initial value set by the system.
- the second setting module 428 is configured to set an ascending step and an ascending step corresponding to the idle threshold, where the idle threshold is less than a minimum value of the overload threshold;
- the step increasing module 429 is connected to the second setting module 428, and is set to forward When the power is less than the idle threshold set by the second setting module 428, the user power under the base station is adjusted to the sum of the initial value set by the system and the rising step.
- the removal module 44 includes: The first determining module 442 is configured to determine whether the total power of the data service under the base station exceeds the resource allocated by the system when the forward power of the base station is greater than the threshold of the second time interval.
- the channel removal module 444 is connected to the first determining module 442. When the determination result of the first judging module 442 is YES, the channel of the user who occupies the largest resource in the data service under the base station is removed.
- the admission control module 46 includes: a second determining module 462, configured to determine whether the forward power of the base station is greater than a threshold of the third time interval; the limiting module 464, connected to the second determining module 462, configured to determine the second determining module 462 When the result is YES, the access or handover of the user under the base station is restricted.
- the base station described in the device embodiment corresponds to the foregoing method embodiment, and the specific implementation process has been described in detail in the method embodiment, and details are not described herein again.
- overload power control operations are respectively performed in three different time intervals, power utilization is improved, overload control is flexibly implemented, and resources are realized when the service call is removed. Fairness between business type users.
- modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
- the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps are fabricated as a single integrated circuit module.
- the invention is not limited to any specific combination of hardware and software.
- the above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the scope of the present invention are intended to be included within the scope of the present invention.
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Abstract
本发明公开了一种功率过载控制方法及基站,该方法包括:基站以第一时间间隔,根据基站的前向功率和第一时间间隔的门限调整基站下用户功率的上限;基站以第二时间间隔,根据基站的前向功率和第二时间间隔的门限对基站下的数据业务进行拆除;基站以第三时间间隔,根据基站的前向功率和第三时间间隔的门限对基站下的业务进行接纳控制,其中,第一时间间隔<第二时间间隔<第三时间间隔,第二时间间隔的门限小于第三时间间隔的门限。通过本发明,解决了进行功率过载控制对系统稳定性造成较大影响的问题,进而有效实现了过载控制。
Description
功率过载控制方法 ^^站 技术领域 本发明涉及通信领域, 具体而言, 涉及一种功率过载控制方法及基站。 背景技术 移动系统中基站的前向发射功率是固定的, 所有移动通信用户是共享功 率资源的, 基站在移动用户通信过程中会分配相应的功率资源给用户, 以满 足前向链路的需求, 使得用户能够接收到基站的信息, 当用户所处的无线环 境较差时, 为了抵消前向无线环境对信号造成的较强千扰及衰落, 基站就会 相应的提升分配给用户的功率, 反之, 当用户所处的无线环境较好时, 前向 信号千扰及衰落较小, 则基站分配给用户的功率就会降低。 所以基站前向功 率的使用情况与用户的无线环境有很大关系, 此外, 由于功率资源在用户之 间是共享的, 因此用户越多消耗的功率资源越大。 可以看出, 基站的射频功 率固定的前提下, 用户的无线环境及用户数是影响功率使用率的重要因素, 而基站的发射总功率取决于功放的配置, 当功放配置完成后, 发射功率基本 就固定下来了, 通常称为额定功率。 随着移动通信系统用户数的增多, 基站前向总发射功率增大, 当总发射 功率超过额定功率值时, 就会使系统设备在非最佳状态甚至非正常状态下工 作, 比如功放关断, 造成系统无法进行通信, 又比如前向发射功率过大, 对 相邻频段的千扰也会增大, 影响语音质量。 这就提出了系统的发射功率过载 控制要求, 过载控制愈显重要。 相关技术中提供了多种功率控制方法, 在相同周期内, 根据不同的过载 等级限制接入和切换, 这种方式会降低系统的容量; 根据过载等级, 直接拆 除业务呼叫来迅速收敛功率, 这种方式影响了掉话率, 尤其是对语音业务用 户, 用户感受很差; 根据过载等级把用户的功率限制在不同的门限值, 当系 统功率长期维持在某两个过载等级之间时, 系统的过载状态实际长期不能得 到緩解。
发明内容 本发明的主要目的在于提供一种功率过载控制方法及基站, 以至少解决 上述的问题。 为了实现上述目的, 根据本发明的一个方面, 提供了一种功率过载控制 方法。 才艮据本发明的功率过载控制方法包括: 基站以第一时间间隔, 居基站 的前向功率和第一时间间隔的门限调整基站下用户功率的上限; 基站以第二 时间间隔, 才艮据基站的前向功率和第二时间间隔的门限对基站下的数据业务 进行拆除; 基站以第三时间间隔, 根据基站的前向功率和第三时间间隔的门 限对基站下的业务进行接纳控制, 其中, 第一时间间隔 <第二时间间隔 <第三 时间间隔, 第二时间间隔的门限小于第三时间间隔的门限。 基站以第一时间间隔, 才艮据基站的前向功率和第一时间间隔的门限调整 基站下用户功率的上限包括: 设定一个或多个第一时间间隔的过载门限及过 载门限对应的下降步长; 如果前向功率大于过载门限的最小值, 确定前向功 率最接近的过载门限, 并降低基站下的用户功率的上限, 下降幅度为最接近 的过载门限对应的下降步长; 如果前向功率小于所有过载门限, 则将基站下 的用户功率的上限恢复为系统设定的初始值。 上述方法还包括: 设定空闲门限及空闲门限对应的上升步长, 其中, 空 闲门限小于过载门限的最小值; 如果前向功率小于空闲门限, 则将基站下用 户功率调整为系统设定的初始值与上升步长之和。 基站以第二时间间隔, 才艮据基站的前向功率和第二时间间隔的门限对基 站下的数据业务进行拆除包括: 如果基站的前向功率大于第二时间间隔的门 限, 判断基站下数据业务的总功率是否超过系统分配的资源量; 如果判断结 果为是, 则拆除基站下数据业务中占用资源最大的用户的信道。 基站以第三时间间隔, 才艮据基站的前向功率和第三时间间隔的门限对基 站下的业务进行接纳控制包括: 判断基站的前向功率是否大于第三时间间隔 的门限; 如果判断结果为是, 则限制基站下用户的接入或切换。 为了实现上述目的, 根据本发明的另一个方面, 提供了一种基站。
根据本发明的基站包括: 调整模块, 设置为以第一时间间隔, 根据基站 的前向功率和第一时间间隔的门限调整基站下用户功率的上限; 拆除模块, 设置为以第二时间间隔, 才艮据基站的前向功率和第二时间间隔的门限对基站 下的数据业务进行拆除; 接纳控制模块, 设置为以第三时间间隔, 根据基站 的前向功率和第三时间间隔的门限对基站下的业务进行接纳控制, 其中, 第 一时间间隔<第二时间间隔<第三时间间隔, 第二时间间隔的门限小于第三时 间间隔的门限。 调整模块包括: 第一设置模块, 设置为设定一个或多个第一时间间隔的 过载门限及过载门限对应的下降步长; 确定模块, 设置为前向功率大于过载 门限的最小值, 确定前向功率最接近的过载门限; 步长下降模块, 设置为降 低基站下的用户功率的上限,下降幅度为最接近的过载门限对应的下降步长; 恢复模块, 设置为前向功率小于所有过载门限, 则将基站下的用户功率的上 限恢复为系统设定的初始值。 调整模块还包括: 第二设置模块, 设置为设定空闲门限及空闲门限对应 的上升步长, 其中, 空闲门限小于过载门限的最小值; 步长上升模块, 设置 为前向功率小于空闲门限, 则将基站下用户功率调整为系统设定的初始值与 上升步长之和。 拆除模块包括: 第一判断模块, 设置为基站的前向功率大于第二时间间 隔的门限时, 判断基站下数据业务的总功率是否超过系统分配的资源量; 信 道拆除模块, 设置为第一判断模块的判断结果为是时, 拆除基站下数据业务 中占用资源最大的用户的信道。 接纳控制模块包括: 第二判断模块, 设置为判断基站的前向功率是否大 于第三时间间隔的门限; 限制模块,设置为第二判断模块的判断结果为是时, 限制基站下用户的接入或切换。 通过本发明, 釆用基站以第一时间间隔, 才艮据基站的前向功率和第一时 间间隔的门限调整基站下用户功率的上限; 基站以第二时间间隔, 艮据基站 的前向功率和第二时间间隔的门限对基站下的数据业务进行拆除; 基站以第 三时间间隔, 才艮据基站的前向功率和第三时间间隔的门限对基站下的业务进 行接纳控制, 解决了现有技术中进行功率过载控制对系统稳定性造成较大影 响的问题, 进而有效实现了过载控制。
附图说明 此处所说明的附图用来提供对本发明的进一步理解, 构成本申请的一部 分, 本发明的示意性实施例及其说明用于解释本发明, 并不构成对本发明的 不当限定。 在附图中: 图 1是 居本发明实施例的功率过载控制方法的流程图; 图 2是 居本发明优选实施例的功率过载控制方法的流程图一; 图 3是 居本发明优选实施例的功率过载控制方法的流程图二; 图 4是 居本发明实施例的基站的结构框图; 以及 图 5是根据本发明实施例的基站的优选的结构框图。 具体实施方式 下文中将参考附图并结合实施例来详细说明本发明。 需要说明的是, 在 不冲突的情况下, 本申请中的实施例及实施例中的特征可以相互组合。 本发明提供了一种功率过载控制方法, 图 1是根据本发明实施例的功率 过载控制方法的流程图, 如图 1所示, 包括: 步骤 S 102 , 基站以第一时间间隔, 根据基站的前向功率和第一时间间隔 的门限调整基站下用户功率的上限; 步 4聚 S 104 , 基站以第二时间间隔, 才艮据基站的前向功率和第二时间间隔 的门限对基站下的数据业务进行拆除; 步 4聚 S 106 , 基站以第三时间间隔, 才艮据基站的前向功率和第三时间间隔 的门限对基站下的业务进行接纳控制, 其中, 第一时间间隔 <第二时间间隔 < 第三时间间隔, 第二时间间隔的门限小于第三时间间隔的门限。 相关技术中的多种功率控制方法, 在相同周期内, 根据不同的过载等级 限制接入和切换, 这种方式会降低系统的容量; 根据过载等级, 直接拆除业 务呼叫来迅速收敛功率, 但是却影响了掉话率, 尤其是对语音业务用户, 用 户感受很差; 根据过载等级把用户的功率限制在不同的门限值, 当系统功率 长期维持在某两个过载等级之间时,系统的过载状态实际长期不能得到緩解,
通过本发明实施例, 分别在不同的周期执行用户功率的上限调整、 数据业务 拆除和接纳控制, 有效保证了载波功率控制。 优选地, 步骤 S 102 包括: 设定一个或多个第一周期的过载门限及过载 门限对应的下降步长; 如果前向功率大于过载门限的最小值, 确定前向功率 最接近的过载门限, 并降低基站下的用户功率的上限, 下降幅度为最接近的 过载门限对应的下降步长; 如果前向功率小于所有过载门限, 则将基站下的 用户功率的上限恢复为系统设定的初始值。 例如: 以周期 X读取载扇功率, 根据获取的功率进行过载判断及控制, 设置过载门限 I个(1>=1 ), 比如 Nl、 N2... Ni(i<=I), 每个过载门限对应一个 下降步长 0<dl<d2<... <di(i<=I), 当载扇功率大于过载门限 N1时, 根据相应 的过载门限釆取相应的下降步长, 过载越严重步长越大, 动态的调整载扇功 率的上限; 当载扇功率小于过载门限时, 立刻恢复功率上限到初始值。 通过本优选实施例,通过自适应的判断载扇的功率使用情况来动态下降、 恢复用户功率的上限, 使得系统用户数较多时, 功率利用率维持在一个较高 的水平, 系统用户数较少时功率又能分配给有需要的用户, 以此整体提高系 统的功率利用率,此外通过步长逐步调整功率上限,使得功率的变化较平稳; 另外通过下调门限牺牲功率较大的用户保证了其余大部分用户的通话质量, 通过较短周期内的过载控制。 比如 20ms一次可以实时地响应前向功率的变 化, 及时有效地实现过载控制, 避免出现过载控制延迟。 步骤 S 102 还包括: 设定空闲门限及所述空闲门限对应的上升步长, 其 中, 所述空闲门限小于所述过载门限的最小值; 如果所述前向功率小于所述 空闲门限, 则将上述基站下用户功率调整为系统设定的初始值与上述上升步 长之和。 例如: 设置载扇有空闲门限 Tl ( T N1 ), 对应上升步长 si , 当载扇功 率小于空闲门限 T1时, 上调用户功率上门限给有需要的用户。 通过本优选实施例, 通过自适应地判断载扇的功率使用情况来动态提升 用户功率门限, 使得系统用户数较少时功率又能分配给有需要的用户, 以此 整体提高系统的功率利用率。 需要说明的是, 在连续周期内调整上限, 但是如果多次调整后的上限小 于给定的上限保护值, 则不再调整。
优选地, 步骤 S 104 包括: 如果基站的前向功率大于第二周期的门限, 判断基站下数据业务的总功率是否超过系统分配的资源量; 如果判断结果为 是, 则拆除基站下数据业务中占用资源最大的用户的信道。 例如: 在周期 Y ( Y大于 X ), 对周期 Y内的载扇功率通过滤波后判断 功率是否达到过载门限 Ml , 达到门限则判断数据业务用户占用的资源是否 超过了预先分配的资源总量 Ps, 若是则拆除功率最大的数据用户, 反之不拆 除。 通过该优选实施例, 通过周期拆除数据用户, 使得功率能够迅速下降, 弥补由于用户较多, 短周期内调整用户功率不能緩解过载的情况, 并且在拆 除数据用户的时候, 考虑到了数据用户的权益, 对系统中对于语音、 数据用 户都是公平的, 没有只牺牲数据用户, 对数据用户的资源进行了预留, 当系 统中数据用户占用的资源超过了为其预留的资源时才会牺牲数据用户尽量保 住语音用户。 优选地, 步骤 S 106 包括: 判断所述基站的前向功率是否大于所述第三 周期的门限; 如果判断结果为是, 则限制上述基站下用户的接入或切换。 通过该优选实施例, 实行了业务的接纳控制, 当用户较多导致功率频繁 过载时, 启动接纳控制, 逐渐的限制接入、 切换, 确保了系统的过载程度不 会由于引入新的用户而进一步恶化, 在保证系统性能的前提下, 尽量维持现 有系统用户的通话。 优选实施例一 在本实施例中, 设定过载控制周期是 X, 有两个过载控制门限, Nl、 N2 且 0<N1<N2, 对应的下降步长 dl、 d2 JL 0<dl<d2, 空闲门限 Tl , JL TKN1 , 对应的上升步长 sl。 图 2是 居本发明优选实施例的功率过载控制方法的流程图一, 如图 2 所示, 包括: 步骤 S202 , 以周期 X获取基站前向总功率。 例如, 每个周期 X读取基站前向功率为 Ptotal。
步骤 S204,判断基站前向总功率是否大于过载门限,如果判断结果为是, 执行步 4聚 S206, 如果判断结果为否, 执行步 4聚 S208。 例如: 当 Ptotal>N 1时, 说明前向功率过载, 执行步骤 S206。 步骤 S206, 才艮据过载门限找到相应的下降步长, 下调用户功率门限。 例如, 若 Ptotal>N2, 则下降步长为 d2, 反之下降步长为 dl。 步骤 S208, 恢复用户功率上限至系统设定的初始值。 例如: 当 Ptota Nl 时, 说明载扇不过载, 令 Pdynamic=Pinitial, 其中 Pdynamic为当前前向业务信道的功率上限值, Pinitial为系统设置的初始功率 上限; 步骤 S210, 判断总功率是否小于空闲门限, 如果判断结果为是, 执行步 骤 S212, 如果判断结果为否, 执行步骤 S202。 步骤 S212, 提升用户功率上门限, 提升幅度为上升步长。 当 Ptota Tl 时, 说明载扇功率利用很低, 载扇处于空闲状态, 抬升功 率上限, Pdynamic= Pinitial+ s 1。 步 4聚 S214, 判断用户功率门限是否小于给定的上限保护值, 如果判断结 果为是, 执行步骤 S216, 如果判断结果为否, 执行步骤 S202。 步骤 S216, 调整用户功率门限 (上限) 等于上限保护值。 优选实施例二 在本实施例中, 设置补充信道拆除周期是 Y, 补充信道拆除门限是 Ml , 接纳控制周期是 Z, 接纳控制过载门限是 M2、 M3且 M1<M2<M3 , 数据业 务预留资源是 Ps, 过载达到门限 M2时控制接入, 到达 M3时限制切换。 图 3是 居本发明优选实施例的功率过载控制方法的流程图二, 如图 3 所示, 包括: 步骤 S302 , 以周期 X获取基站前向功率。 步 4聚 S304, 周期 Y获取周期 Y内的滤波后前向功率。
例如, 每个周期 γ, 对 Y/X个周期的功率进行滤波, 滤波方式可以随意 选择, 比如最简单的对 Y/X个周期的功率进行求平均后功率为 Paverage_l。 步骤 S306,判断总功率是否大于数据业务拆除门限,如果判断结果为是, 进入步 4聚 S308, 如果判断结果为否, 进入步 4聚 S302。 例如: Paverage_l>Ml , 进入步骤 S308, 如果判断结果为否, 进入步骤
S302。 步骤 S308, 判断数据用户占用总功率是否大于预留资源, 如果判断结果 为是, 进入步骤 S310。 步骤 S310, 拆除数据用户中占用资源最多的数据用户的补充信道。 例如: 若数据用户总功率 Pdatauser>Ps, 则在所有的数据用户中选择一 个占用功率最大的数据用户, 拆除掉该用户的补充信道。 步骤 S312, 周期 Z获取周期 Z内的滤波后前向功率。 例如: 每个周期 Z, 对 Z/X个周期的功率做滤波, 比如滤波方式就是求 平均, 滤波后的功率是 Paverage_2。 步骤 S314, 判断总功率是否大于接纳控制门限, 如果判断结果为是, 进 入步 4聚 S316, 如果判断结果为否, 进入到步 4聚 S312。 例如: Paverage_2>M2, 说明大于接纳控制门限, 进入步 4聚 S316, 如果 判断结果为否, 进入到步骤 S312。 步骤 S316, 根据接纳控制门限釆取相应的控制措施, 控制接入、 控制切 换。 例如: M2<Paverage_2<M3 , 则限制新用户的接入; Paverage_2>M3 同 时限制新用户的接入和用户间的切换。 图 4是根据本发明实施例的基站的结构框图, 如图 4所示, 包括: 调整 模块 42、 拆除模块 44和接纳控制模块 46 , 下面对上述结构进行详细描述: 调整模块 42 , 设置为以第一时间间隔, 居基站的前向功率和第一时间 间隔的门限调整基站下用户功率的上限;
拆除模块 44 , 连接至调整模块 42 , 设置为以第二时间间隔, 根据基站 的前向功率和第二时间间隔的门限对基站下的数据业务进行拆除; 接纳控制模块 46 , 连接至拆除模块 44 , 设置为以第三时间间隔, 根据 基站的前向功率和第三时间间隔的门限对基站下的业务进行接纳控制,其中, 第一时间间隔<第二时间间隔<第三时间间隔, 第二时间间隔的门限小于第三 时间间隔的门限。 图 5是根据本发明实施例的基站的优选的结构框图, 如图 5所示, 调整 模块 42包括: 第一设置模块 422、 确定模块 424、 步长下降模块 426、 恢复 模块 427、 第二设置模块 428、 步长上升模块 429 , 拆除模块 44包括: 第一 判断模块 442和信道拆除模块 444 , 接纳控制模块 46 包括: 第二判断模块 462和限制模块 464 , 下面对上述结构进行详细描述。 调整模块 42包括: 第一设置模块 422 , 设置为设定一个或多个第一时间间隔的过载门限及 过载门限对应的下降步长; 确定模块 424 , 连接至第一设置模块 422 , 设置 为前向功率大于第一设置模块 422设置的过载门限的最小值, 确定前向功率 最接近的过载门限; 步长下降模块 426 , 连接至确定模块 424 , 设置为将基站下的用户功率 的上限下降与确定模块 424确定最接近的过载门限对应的步长; 恢复模块 427 , 连接至第一设置模块 422 , 设置为前向功率小于第一设 置模块 422设置所有过载门限, 则将基站下的用户功率的上限恢复为系统设 定的初始值。 第二设置模块 428 , 设置为设定空闲门限及空闲门限对应的上升步长, 其中, 空闲门限小于过载门限的最小值; 步长上升模块 429 , 连接至第二设置模块 428 , 设置为前向功率小于第 二设置模块 428设置的空闲门限时, 将基站下用户功率调整为系统设定的初 始值与上升步长之和。 拆除模块 44包括:
第一判断模块 442 ,设置为基站的前向功率大于第二时间间隔的门限时, 判断基站下数据业务的总功率是否超过系统分配的资源量; 信道拆除模块 444 , 连接至第一判断模块 442 , 设置为第一判断模块 442的判断结果为是的 情况下, 拆除基站下数据业务中占用资源最大的用户的信道。 接纳控制模块 46包括: 第二判断模块 462 , 设置为判断基站的前向功率是否大于第三时间间隔 的门限; 限制模块 464 , 连接至第二判断模块 462 , 设置为第二判断模块 462 的判断结果为是时, 限制基站下用户的接入或切换。 需要说明的是, 装置实施例中描述的基站对应于上述的方法实施例, 其 具体地实现过程在方法实施例中已经进行过详细描述, 在此不再赘述。 综上所述, 通过本发明, 在三个不同的时间间隔内分别进行过载功率控 制的操作, 提高功率利用率, 灵活地实现了过载的控制, 且在拆除业务呼叫 时, 实现了资源在不同业务类型用户间的公平性。 显然, 本领域的技术人员应该明白, 上述的本发明的各模块或各步骤可 以用通用的计算装置来实现, 它们可以集中在单个的计算装置上, 或者分布 在多个计算装置所组成的网络上, 可选地, 它们可以用计算装置可执行的程 序代码来实现, 从而, 可以将它们存储在存储装置中由计算装置来执行, 并 且在某些情况下, 可以以不同于此处的顺序执行所示出或描述的步骤, 或者 将它们分别制作成各个集成电路模块, 或者将它们中的多个模块或步骤制作 成单个集成电路模块来实现。 这样, 本发明不限制于任何特定的硬件和软件 结合。 以上所述仅为本发明的优选实施例而已, 并不用于限制本发明, 对于本 领域的技术人员来说, 本发明可以有各种更改和变化。 凡在本发明的 ^"神和 原则之内, 所作的任何修改、 等同替换、 改进等, 均应包含在本发明的保护 范围之内。
Claims
1. 一种功率过载控制方法, 包括:
基站以第一时间间隔, 据所述基站的前向功率和所述第一时间 间隔的门限调整所述基站下用户功率的上限;
所述基站以第二时间间隔, 才艮据所述基站的前向功率和所述第二 时间间隔的门限对所述基站下的数据业务进行拆除;
所述基站以第三时间间隔, 才艮据所述基站的前向功率和所述第三 时间间隔的门限对所述基站下的业务进行接纳控制, 其中, 第一时间 间隔<第二时间间隔<第三时间间隔, 所述第二时间间隔的门限小于所 述第三时间间隔的门限。
2. 根据权利要求 1所述的方法, 其中, 基站以第一时间间隔, 根据所述 基站的前向功率和所述第一时间间隔的门限调整所述基站下用户功率 的上限包括:
设定一个或多个所述第一时间间隔的过载门限及所述过载门限对 应的下降步长;
如果所述前向功率大于所述过载门限的最小值, 确定所述前向功 率最接近的过载门限, 并降氏所述基站下的用户功率的上限, 下降幅 度为所述最接近的过载门限对应的下降步长;
如果所述前向功率小于所有所述过载门限, 则将所述基站下的用 户功率的上限恢复为系统设定的初始值。
3. 根据权利要求 2所述的方法, 其中, 还包括:
设定空闲门限及所述空闲门限对应的上升步长, 其中, 所述空闲 门限小于所述过载门限的最小值;
如果所述前向功率小于所述空闲门限, 则将所述基站下用户功率 调整为系统设定的初始值与所述上升步长之和。
4. 根据权利要求 1所述的方法, 其中, 所述基站以第二时间间隔, 根据 所述基站的前向功率和所述第二时间间隔的门限对所述基站下的数据 业务进行拆除包括: 如果所述基站的前向功率大于所述第二时间间隔的门限, 判断所 述基站下数据业务的总功率是否超过系统分配的资源量;
如果判断结果为是, 则拆除所述基站下数据业务中占用资源最大 的用户的信道。
5. 根据权利要求 1所述的方法, 其中, 所述基站以第三时间间隔, 根据 所述基站的前向功率和所述第三时间间隔的门限对所述基站下的业务 进行接纳控制包括:
判断所述基站的前向功率是否大于所述第三时间间隔的门限; 如果判断结果为是, 则限制所述基站下用户的接入或切换。
6. 一种基站, 包括:
调整模块, 设置为以第一时间间隔, 才艮据所述基站的前向功率和 所述第一时间间隔的门限调整所述基站下用户功率的上限;
拆除模块, 设置为以第二时间间隔, 根据所述基站的前向功率和 所述第二时间间隔的门限对所述基站下的数据业务进行拆除;
接纳控制模块, 设置为以第三时间间隔, 根据所述基站的前向功 率和所述第三时间间隔的门限对所述基站下的业务进行接纳控制, 其 中, 第一时间间隔<第二时间间隔<第三时间间隔, 所述第二时间间隔 的门限小于所述第三时间间隔的门限。
7. 根据权利要求 6所述的基站, 其中, 所述调整模块包括:
第一设置模块, 设置为设定一个或多个所述第一时间间隔的过载 门限及所述过载门限对应的下降步长;
确定模块, 设置为所述前向功率大于所述过载门限的最小值, 确 定所述前向功率最接近的过载门限;
步长下降模块, 设置为降低所述基站下的用户功率的上限, 下降 幅度为所述最接近的所述过载门限对应的下降步长;
恢复模块, 设置为所述前向功率小于所有所述过载门限时, 将所 述基站下的用户功率的上限恢复为系统设定的初始值。
8. 根据权利要求 7所述的基站, 其中, 所述调整模块还包括: 第二设置模块, 设置为设定空闲门限及所述空闲门限对应的上升 步长, 其中, 所述空闲门限小于所述过载门限的最小值;
步长上升模块, 设置为所述前向功率小于所述空闲门限时, 将所 述基站下用户功率调整为系统设定的初始值与所述上升步长之和。
9. 根据权利要求 6所述的基站, 其中, 所述拆除模块包括:
第一判断模块, 设置为所述基站的前向功率大于所述第二时间间 隔的门限时, 判断所述基站下数据业务的总功率是否超过系统分配的 资源量;
信道拆除模块, 设置为所述第一判断模块的判断结果为是时, 拆 除所述基站下数据业务中占用资源最大的用户的信道。
10. 根据权利要求 6所述的基站, 其中, 所述接纳控制模块包括:
第二判断模块, 设置为判断所述基站的前向功率是否大于所述第 三时间间隔的门限;
限制模块, 设置为所述第二判断模块的判断结果为是时, 限制所 述基站下用户的接入或切换。
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