WO2012174714A1 - Wireless access point and radio-frequency emission power adjustment method thereof - Google Patents

Wireless access point and radio-frequency emission power adjustment method thereof Download PDF

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Publication number
WO2012174714A1
WO2012174714A1 PCT/CN2011/076071 CN2011076071W WO2012174714A1 WO 2012174714 A1 WO2012174714 A1 WO 2012174714A1 CN 2011076071 W CN2011076071 W CN 2011076071W WO 2012174714 A1 WO2012174714 A1 WO 2012174714A1
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Prior art keywords
access point
wireless access
threshold
radio frequency
packet loss
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PCT/CN2011/076071
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French (fr)
Chinese (zh)
Inventor
孙旺强
彭永超
李迎新
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中兴通讯股份有限公司
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Priority to PCT/CN2011/076071 priority Critical patent/WO2012174714A1/en
Publication of WO2012174714A1 publication Critical patent/WO2012174714A1/en

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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
    • H04W52/18—TPC being performed according to specific parameters
    • H04W52/26—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service]
    • H04W52/267—TPC being performed according to specific parameters using transmission rate or quality of service QoS [Quality of Service] taking into account the information rate

Definitions

  • the determining module 20 is configured to determine whether the packet loss rate currently detected by the first monitoring module 10 is less than a first threshold, and if so, the triggering adjustment module 30 gradually reduces the radio frequency transmit power of the wireless access point;
  • the module 30 is configured to adjust the radio frequency transmit power of the wireless access point according to the trigger of the determining module 20.
  • the method mainly increases the Beacon Interval, simply reduces the RF transmission power, or stops part of the PA operation to reduce the energy consumption of the wireless AP. These methods either cause the user to discover that the network process is slow, or cause radio frequency coverage. Smaller makes users unable to access the network in certain locations.

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  • Engineering & Computer Science (AREA)
  • Quality & Reliability (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

A wireless access point and a radio-frequency emission power adjustment method thereof are provided in the present invention. Wherein the method includes: the wireless access point continuously monitors the packet loss rate of a workstation which is connected with the wireless access point; and when the packet loss rate is less than a first threshold value, the wireless access point reduces its radio-frequency emission power gradually. By the present invention, on condition that the data communication between the wireless access point and the workstation is ensured to be not affected, the radio-frequency emission power is reduced as much as possible and the whole energy consumption of the wireless access point is reduced effectively.

Description

无线接入点及其射频发射功率的调整方法 技术领域 本发明涉及通信领域， 具体而言， 涉及一种无线接入点及其射频发射功率 的调整方法。 背景技术 无线局 i或网 （ Wireless Local , 简称为 WLAN )作为一种网络接入方式， 具 备接入速度高， 布线简易等优点， 越来越被广泛地应用于家庭网络。 研究表明 WLAN的能耗主要集中在无线接入点（ Access Point, 简称为 AP )的基带（ base band, 简称为 BB ) 和射频 （Radio )模块， 在接收模式下 Radio模块的耗能占 50%左右， BB模块约占 20%; 而在发送模式下 Radio模块耗能约占 91%, BB 模块约占 3%。 因此， 无论在发送模式还是接收模式， 射频模块的耗能都占很 大的比例。 为了降低射频模块的耗能， 目前釆用的方法主要包括： 增加引导信号 ( Beacon ) 间隔 （Interval ) 以减少主动发包、 降氐射频发射功率、 停止部分功 率放大器 （ Power Amplify , 简称为 PA ) 工作等。 虽然这些方法可以在一定程 度上减小了射频模块的能耗，但这些方法都影响了用户体验。例如，增加 Beacon Interval可能导致用户发现网络过程变' 1"曼；而简单地降氐射频发射功率和停止部 分 PA工作将导致射频覆盖范围变小， 从而导致用户在使用无线网络时， 在某 些位置可能无法接入网络， 进而降氐用户体 -险。 发明内容 本发明的主要目的在于提供一种无线接入点及其射频发射功率的调整方 法， 以至少解决上述问题之一。 根据本发明的一个方面， 提供了一种无线接入点的射频发射功率的调整方 法， 包括： 无线接入点持续监测关联到其上的工作站的丢包率； 在丢包率小于 第一阈值的情况下， 无线接入点逐级地降氏无线接入点的射频发射功率。 优选地， 上述方法还包括： 无线接入点确定当前监测到的丢包率大于或等 于第一阈值； 无线接入点逐级调高射频发射功率， 直至当前监测到的丢包率小 于第一阈值或射频发射功率达到无线接入点的最大射频发射功率。 优选地， 在无线接入点每次降氏射频发射功率之前， 上述方法还包括： 无 线接入点确定对工作站的接收信号强度大于第二阈值。 优选地， 如果无线接入点确定对工作站的接收信号强度小于或等于第二阈 值， 上述方法还包括： 无线接入点逐级地调高射频发射功率， 直至接收信号强 度大于第二阈值且丢包率小于第一阈值， 或射频发射功率达到无线接入点的最 大射频发射功率。 优选地， 关联到无线接入点的工作站为多个； 无线接入点确定对各个工作 站的接收信号强度均大于第二阈值， 且各个工作站的丢包率均小于第一阈值 时， 执行降低射频发射功率的操作， 确定对各个工作站之一的接收信号强度不 大于第二阈值或各个工作站之一的丢包率不小于第一阈值时， 执行调高射频发 射功率的操作。 优选地， 关联到无线接入点的工作站为多个； 在满足各个工作站的丢包率 均小于第一阈值的情况下， 无线接入点执行降低射频发射功率的操作， 在各个 工作站之一的丢包率不小于第一阈值的情况下， 无线接入点执行调高射频发射 功率的操作。 优选地， 无线接入点监测工作站的丢包率包括： 无线接入点向工作站发送 4艮文； 无线接入点接收工作站返回的响应； 无线接入点通过统计单位时间内发 送报文的数量与接收到的响应的数量确定丢包率。 根据本发明的另一方面， 提供了一种无线接入点， 包括： 第一监测模块， 设置为持续监测关联到无线接入点的工作站的丢包率； 判断模块， 设置为判断 第一监测模块当前监测到的丢包率是否小于第一阈值， 如果是， 则触发调整模 块逐级地降低无线接入点的射频发射功率； 调整模块， 设置为按照判断模块的 触发调整无线接入点的射频发射功率。 优选地， 判断模块还设置为在丢包率不小于第一阈值时， 触发调整模块逐 级地调高无线接入点的射频发射功率。 优选地， 上述无线接入点还包括： 第二监测模块， 设置为持续监测无线接 入点对工作站的接收信号强度； 判断模块还设置为在判断丢包率小于第一阈值 且接收信号强度大于第二阈值时， 触发调整模块逐级地降低无线接入点的射频 发射功率， 在判断丢包率不小于第一阈值或接收信号强度不大于第二阈值时， 触发调整模块逐级地调高无线接入点的射频发射功率。 通过本发明， 无线接入点 居工作站的丢包率， 逐级调整无线接入点的射 频发射功率， 从而可以在保证无线接入点与工作站之间的数据通过不受影响的 情况下， 尽量的降低射频发射功率， 有效地降低无线接入点的整体能耗。 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是根据本发明实施例一的无线接入点的结构示意图； 图 2是根据本发明实施例一的优选无线接入点的结构示意图； 图 3是 居本发明实施例一的射频发射功率的调整方法的流程图； 图 4是 居本发明实施例一的优选射频发射功率的调整方法的流程图； 图 5是本发明实施例二的应用场景示意图； 图 6是 居本发明实施例二的射频发射功率的调整方法的流程图； 图 7是本发明实施例三的应用场景示意图； 图 8是 居本发明实施例三的射频发射功率的调整方法的流程图。 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。 实施例一 图 1为根据本发明实施例一的无线接入点的结构示意图， 该无线接入点包 括：第一监测模块 10,设置为持续监测关联到该无线接入点的工作站的丢包率； 判断模块 20 , 设置为判断第一监测模块 10当前监测到的丢包率是否小于第一 阈值， 如果是， 则触发调整模块 30逐级地降低该无线接入点的射频发射功率； 调整模块 30 , 设置为按照判断模块 20的触发调整该无线接入点的射频发射功 率。 在相关技术中主要是釆用增加 Beacon Interval、 简单地减氐射频发射功率 或停止部分 PA工作等方法来降低无线 AP的能耗， 这些方法要么导致用户发 现网络过程变慢， 要么导致射频覆盖范围变小使用户在某些位置无法接入网 络。 而本发明实施例提供的上述无线接入点， 根据工作站的丢包率来调整无线 接入点的射频发射功率， 在丢包率较小的情况下逐级降低射频发射功率， 而不 是简单地降低射频发射功率， 从而可以在保证无线 AP与工作站之间的数据通 信不受影响的情况下， 尽可能的降低射频发射功率， 有效的降低了无线 AP的 整体能耗。 优选地， 判断模块 20还可以在丢包率不小于第一阈值时， 触发调整模块 30逐级地调高无线接入点的射频发射功率， 直至第一监测模块 10当前监测到 丢包率小于第一阈值或射频发射功率达到无线接入点的最大射频发射功率， 从 而可以进一步工作站与无线接入点之间的数据通信正常。 图 2为根据本发明实施例一的优选无线接入点的结构示意图， 该无线接入 点还可以包括： 第二监测模块 40, 设置为持续监测无线接入点对工作站的接收 信号强度； 判断模块 20 在判断丢包率小于第一阈值且该接收信号强度大于第 二阈值时， 触发调整模块 30 逐级地降低无线接入点的射频发射功率， 在判断 丢包率不小于第一阈值或接收信号强度不大于第二阈值时， 触发调整模块 30 逐级地调高无线接入点的射频发射功率， 直至第一监测模块 10 当前监测到丢 包率小于第一阈值且第二监测模块 40 当前监测到的接收信号强度大于第二阈 值， 或射频发射功率达到无线接入点的最大射频发射功率。 这样， 通过设置第 二阈值， 可以保证无线接入点的射频发射功率不至于太氏， 以至于影响到无线 接入点的其他通信质量。 在实际应用中， 上述第一阈值和第二阈值可以通过评测确定。 在实际应用中， 关联到无线接入点的工作站可能为多个， 则第一监测模块 10设置为持续监测所有工作站的丢包率， 第二监测模块 40设置为持续监测对 所有工作站的接收信号强度， 在所有工作站的丢包率均小于上述第一阈值或者 所有工作站的丢包率均小于上述第一阈值且所有工作站的接收信号强度均大 于第二阈值的情况下， 判断模块 20触发调整模块 30逐级降低无线接入点的射 频发射功率； 在其中一个工作站的丢包率不小于第一阈值或接收信号强度不大 于第二阈值时， 触发调整模块 30逐级调高无线接入点的射频发射功率。 图 3为根据本发明实施例一的无线接入点的射频发射功率的调整方法的流 程图， 该方法主要包括以下步骤 (步骤 S302 -步骤 S308 ): 步骤 S302, 无线接入点的第一监测模块 10监测关联到其上的工作站当前 的丢包率； 例如， 第一监测模块 10 可以通过向工作站持续发送 4艮文， 并接收工作站 返回的响应 （例如， ACK响应）， 然后通过统计单位时间内接收到的响应的数 量与发送报文的数量的比例来确定该工作站的丢包率。 步骤 S304,判断模块 20判断第一监测模块 10当前监测到的丢包率是否小 于第一阈值， 如果是， 则执行步骤 S306, 否则， 执行步骤 S308; 例如， 第一阈值可以在实际应用中进行评测确定。 步骤 S306,判断模块 20触发调整模块 30将无线接入点的射频发射功率降 氐一个等级， 返回执行步 4聚 S302; 例如， 可以根据无线接入点的最大射频发射功率， 将射频发射功率分为多 个等级， 每个等级之间的差值可以相同也可以不同， 比如， 当射频发射功率较 大时， 每个等级之间的差值可以增大， 这样使得无线接入点可以快速的调整到 比较合适的射频发射功率； 当射频发射功率降低到比较小时， 每个等级之间的 差值可以缩小， 这样可以使得无线接入点最终使用的射频发射功率最接近合适 的值。 步骤 S308, 不调整无线接入点的射频发射功率， 返回执行步骤 S302。 或者， 如图 4所示， 在步骤 S308' 中， 判断模块 20也可以触发调整模块 30将无线接入点的射频发射功率调高一个等级， 再返回执行步骤 S302, 这样 可以进一步保证无线接入点与工作站之间的数据通信。 在相关技术中主要是釆用增加 Beacon Interval、 简单地减氐射频发射功率 或停止部分 PA工作等方法来降低无线 AP的能耗， 这些方法要么导致用户发 现网络过程变慢， 要么导致射频覆盖范围变小使用户在某些位置无法接入网 络。 而本发明实施例提供的无线接入点的射频发射功率的调整方法中， 无线接 入点根据工作站的丢包率来调整无线接入点的射频发射功率， 在丢包率较小的 情况下逐级降氏射频发射功率， 而不是简单地降氏射频发射功率， 从而可以在 保证无线 AP与工作站之间的数据通信不受影响的情况下， 尽可能的降低射频 发射功率， 有效的降低了无线 AP的整体能耗。 优选地， 在上述步骤 S304 中， 在确定丢包率小于第一阈值时， 判断模块 20 还可以进一步判断无线接入点对该工作站的接收信号强度是否大于第二阈 值， 如果是， 则执行步骤 S306, 否则， 执行步骤 S308, 将射频发射功率调高 一个等级， 并返回步 4聚 S302。 这样可以避免无线接入点的射频发射功率调整过 低而影响无线接入点的其它通信质量。 优选地， 在步骤 S308 中， 如果射频发射功率已经达到无线接入点的最大 射频发射功率， 则调整模块 30 不再调高无线接入点的射频发射功率， 直接返 回执行步 4聚 S302。 在实际应用中， 关联到无线接入点的工作站可以为多个， 在这种情况下， 在上述方法中， 无线接入点确定对各个工作站的接收信号强度均大于第二阈 值，且各个工作站的丢包率均小于第一阈值时，执行降低射频发射功率的操作， 确定对各个工作站之一的接收信号强度不大于第二阈值或各个工作站之一的 丢包率不小于第一阈值时， 执行调高所述射频发射功率的操作。 或者， 如果不 考虑接收信号强度， 则在满足各个工作站的丢包率均小于第一阈值的情况下， 无线接入点执行降低射频发射功率的操作， 在各个工作站之一的丢包率不小于 第一阈值的情况下， 无线接入点执行调高射频发射功率的操作。 这样可以保证 各个工作站都能正常地与无线接入点通信。 在上述方法中， 各个工作站的丢包率可通过无线 AP发送 4艮文之后工作站 响应的 ACK来确认， 如果没有 ACK则认为发生了丢包， 通过统计单位时间内 的丢包数量与发送报文的数量即可确定丢包率。 实施例二 图 5为根据本发明实施例二的应用场景示意图， 在本实施例中， 与无线接 入点关联的工作站 （STA ) 只有一个， 当 STA从位置 1移动到位置 2, 再移动 到位置 3时， 当 STA向无线 AP靠近时， 无线 AP 居接收信号强度和统计的 丢包率情况， 降氐射频发射功率。 当 STA远离无线 AP时， 无线 AP监测到接 收信号强度变差， 统计丢包率增加且超过了阈值， 则调高射频发射功率， 直到 丢包率回复正常， 或进入满功率状态。 图 6为才艮据本发明实施例二的无线 AP的射频发射功率的调整方法的流程 图， 该方法主要包括以下步骤： 步骤 S601 , 无线 AP启动进入满功率运行状态， 即无线 AP当前的射频发 射功率为其最大射频发射功率； 步骤 S602, —个 STA关联到无线 AP上， 无线 AP统计与该 STA之间的 丢包率， 并且获得当前对该 STA的接收信号强度； 步骤 S603 , 无线 AP判断丢包率是否小于第一阈值， 如果是， 则执行步骤 S604, 否则， 执行步骤 S605; 步骤 S604, 无线 AP判断接收信号强度是否大于第二阈值， 即判断接收信 号强度是否变好或很好， 如果， 则执行步骤 S606, 否则， 执行步骤 S605; 步骤 S605 , 无线 AP将射频发射功率调高一个等级， 返回步骤 S602; 如果当前的射频发射功率为最大射频发射功率， 则不调高当前的射频发射 功率， 直接返回步 4聚 S602; 步骤 S606, 无线 AP 将其当前的射频发射功率降低一个等级， 返回步骤 S602。 在上述流程中， 在步骤 S605 调高功率之后， 再次监测通讯过程中的丢包 率， 如果 STA的丢包率都恢复到以前正常状态， 则停止调高发射功率， 如果接 收信号信号强度没有变化且丢包率都正常， 则可以稳定在当前的射频发射功 率。 通过本发明实施例， 在无线接入点只关联一个 STA的情况下， 可以 -据与 该 STA之间的丢包率和对该 STA的接收信号强度调整无线接入点的射频发射 功率， 从而可以在不影响用户体验的情况下， 有效的降低无线接入点的能耗。 实施例三 图 7为根据本发明实施例二的应用场景示意图， 在本实施例中， 与无线接 入点关联的 STA包括： STA1、 STA2和 STA3。 图 8为 居本发明实施例三的无线 AP的射频发射功率的调整方法的流程 图， 该方法主要包括以下步骤： 步骤 S801 , 无线 AP启动进入满功率运行状态， 即无线 AP当前的射频发 射功率为其最大射频发射功率； 步骤 S802, STA1、 STA2和 STA3关联到无线 AP上， 无线 AP统计与各 个 STA之间的丢包率， 并且获得当前对各个 STA的接收信号强度； 步骤 S803 , 无线 AP判断与各个 STA之间的丢包率是否均小于第一阈值， 如果是， 则执行步骤 S804, 否则， 执行步骤 S805; 步骤 S804, 无线 AP判断对各个 STA的接收信号强度是否均大于第一阈 值， 如果， 则执行步骤 S 806, 否则， 执行步骤 S 805; 步骤 S805 , 无线 AP将射频发射功率调高一个等级， 返回步骤 S802; 如果当前的射频发射功率为最大射频发射功率， 则不调高当前的射频发射 功率， 直接返回步 4聚 S802; 步骤 S806, 无线 AP 将其当前的射频发射功率降低一个等级， 返回步骤 S802。 在上述流程中，在步骤 S805调高功率之后，再次监测通讯过程中各个 STA 的丢包率， 如果各个 STA的丢包率都恢复到以前正常状态， 则停止调高发射功 率， 如果对各个 STA的接收信号信号强度没有变化且丢包率都正常， 则可以稳 定在当前的射频发射功率。 通过本发明实施例， 在无线接入点关联多个 STA的情况下， 可以根据与各 个 STA之间的丢包率和对各个 STA的接收信号强度调整无线接入点的射频发 射功率，从而可以在不影响用户体验的情况下，有效的降低无线接入点的能耗。 从以上的描述中， 可以看出， 在本发明实施例中， 无线接入点能够根据与TECHNICAL FIELD The present invention relates to the field of communications, and in particular to a method for adjusting a wireless access point and its radio frequency transmit power. BACKGROUND OF THE INVENTION Wireless Local Office (WLAN), as a network access method, has the advantages of high access speed and simple wiring, and is widely used in home networks. Research shows that the energy consumption of WLAN is mainly concentrated in the baseband (BB) and radio (Radio) modules of the access point (AP). In the receiving mode, the energy consumption of the Radio module accounts for 50%. Left and right, the BB module accounts for about 20%; while in the transmit mode, the Radio module consumes about 91% of the energy, and the BB module accounts for about 3%. Therefore, the energy consumption of the RF module accounts for a large proportion in both the transmit mode and the receive mode. In order to reduce the energy consumption of the RF module, the current methods mainly include: adding a Beacon interval (Interval) to reduce active packet transmission, lowering the RF transmit power, and stopping part of the power amplifier (Power Amplify, referred to as PA). Wait. Although these methods can reduce the energy consumption of the RF module to a certain extent, these methods all affect the user experience. For example, adding a Beacon Interval may cause the user to discover that the network process becomes '1'MAN; and simply lowering the RF transmit power and stopping part of the PA work will result in a smaller RF coverage, resulting in the user using the wireless network, in some The main purpose of the present invention is to provide a wireless access point and a method for adjusting the radio frequency transmission power thereof to solve at least one of the above problems. An aspect of the present invention provides a method for adjusting radio frequency transmit power of a wireless access point, including: the wireless access point continuously monitors a packet loss rate of a workstation associated with the wireless access point; and if the packet loss rate is less than the first threshold The wireless access point gradually increases the radio frequency transmit power of the wireless access point. Preferably, the method further includes: determining, by the wireless access point, that the currently detected packet loss rate is greater than or equal to the first threshold; the wireless access point increases the radio frequency transmit power step by step until the currently detected packet loss rate is less than the first The threshold or RF transmit power reaches the maximum RF transmit power of the wireless access point. Preferably, before the wireless access point lowers the radio frequency transmit power, the method further includes: the wireless access point determining that the received signal strength of the workstation is greater than a second threshold. Preferably, if the wireless access point determines that the received signal strength of the workstation is less than or equal to the second threshold, the method further includes: the wireless access point gradually increasing the radio frequency transmit power until the received signal strength is greater than the second threshold and is lost. The packet rate is less than the first threshold, or the radio frequency transmit power reaches the maximum radio frequency transmit power of the wireless access point. Preferably, the number of workstations associated with the wireless access point is multiple; when the wireless access point determines that the received signal strengths of the respective workstations are greater than the second threshold, and the packet loss rate of each workstation is less than the first threshold, performing the radio frequency reduction The operation of transmitting power determines to perform an operation of increasing the radio frequency transmission power when the received signal strength of one of the stations is not greater than the second threshold or the packet loss rate of one of the stations is not less than the first threshold. Preferably, the number of workstations associated with the wireless access point is multiple; in the case that the packet loss rate of each workstation is less than the first threshold, the wireless access point performs the operation of reducing the radio frequency transmit power, at one of the workstations. When the packet loss rate is not less than the first threshold, the wireless access point performs an operation of increasing the radio frequency transmit power. Preferably, the wireless access point monitoring station has a packet loss rate, including: the wireless access point sends the message to the workstation; the wireless access point receives the response returned by the workstation; and the number of the message sent by the wireless access point by the statistical unit time The packet loss rate is determined by the number of responses received. According to another aspect of the present invention, a wireless access point is provided, including: a first monitoring module configured to continuously monitor a packet loss rate of a workstation associated with a wireless access point; and a determining module configured to determine the first monitoring Whether the packet loss rate currently detected by the module is less than the first threshold, if yes, the trigger adjustment module gradually reduces the radio transmission power of the wireless access point; the adjustment module is set to adjust the wireless access point according to the trigger of the determination module. RF transmit power. Preferably, the determining module is further configured to: when the packet loss rate is not less than the first threshold, trigger the adjustment module to gradually increase the radio frequency transmit power of the wireless access point. Preferably, the wireless access point further includes: a second monitoring module, configured to continuously monitor the received signal strength of the wireless access point to the workstation; the determining module is further configured to determine that the packet loss rate is less than the first threshold and the received signal strength is greater than When the second threshold is used, the trigger adjustment module gradually reduces the radio frequency transmission power of the wireless access point. When the packet loss rate is not less than the first threshold or the received signal strength is not greater than the second threshold, the trigger adjustment module is stepped up. RF transmit power of the wireless access point. Through the invention, the wireless access point has a packet loss rate of the workstation, and the radio frequency transmission power of the wireless access point is adjusted step by step, thereby ensuring that the data passing between the wireless access point and the workstation is not affected, Reduce the RF transmit power and effectively reduce the overall energy consumption of the wireless access point. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a schematic structural diagram of a wireless access point according to a first embodiment of the present invention; FIG. 2 is a schematic structural diagram of a preferred wireless access point according to a first embodiment of the present invention; FIG. 4 is a flowchart of a method for adjusting a preferred radio frequency transmission power according to Embodiment 1 of the present invention; FIG. 5 is a schematic diagram of an application scenario of Embodiment 2 of the present invention; FIG. 7 is a schematic diagram of an application scenario of the third embodiment of the present invention; FIG. 8 is a flowchart of a method for adjusting radio frequency transmit power according to Embodiment 3 of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. 1 is a schematic structural diagram of a wireless access point according to a first embodiment of the present invention. The wireless access point includes: a first monitoring module 10 configured to continuously monitor a packet loss of a workstation associated with the wireless access point. The determining module 20 is configured to determine whether the packet loss rate currently detected by the first monitoring module 10 is less than a first threshold, and if so, the triggering adjustment module 30 gradually reduces the radio frequency transmit power of the wireless access point; The module 30 is configured to adjust the radio frequency transmit power of the wireless access point according to the trigger of the determining module 20. In the related art, the method mainly increases the Beacon Interval, simply reduces the RF transmission power, or stops part of the PA operation to reduce the energy consumption of the wireless AP. These methods either cause the user to discover that the network process is slow, or cause radio frequency coverage. Smaller makes users unable to access the network in certain locations. The wireless access point provided by the embodiment of the present invention adjusts the radio frequency transmit power of the wireless access point according to the packet loss rate of the workstation, and reduces the radio frequency transmit power step by step when the packet loss rate is small, instead of simply By reducing the radio frequency transmit power, the radio frequency transmit power can be reduced as much as possible while ensuring that the data communication between the wireless AP and the workstation is not affected, thereby effectively reducing the overall energy consumption of the wireless AP. Preferably, the determining module 20 may further trigger the adjustment module 30 to increase the radio frequency transmit power of the wireless access point step by step until the packet loss rate is less than the first threshold, until the first monitoring module 10 currently detects that the packet loss rate is less than The first threshold or the radio frequency transmit power reaches the maximum radio frequency transmit power of the wireless access point, so that the data communication between the workstation and the wireless access point can be further normal. 2 is a schematic structural diagram of a preferred wireless access point according to the first embodiment of the present invention. The wireless access point may further include: a second monitoring module 40 configured to continuously monitor the received signal strength of the wireless access point to the workstation; When the module 20 determines that the packet loss rate is less than the first threshold and the received signal strength is greater than the second threshold, the trigger adjustment module 30 gradually reduces the radio frequency transmit power of the wireless access point, and determines that the packet loss rate is not less than the first threshold or When the received signal strength is not greater than the second threshold, the triggering adjustment module 30 increases the radio frequency transmit power of the wireless access point step by step until the first monitoring module 10 detects that the packet loss rate is less than the first threshold and the second monitoring module 40 The currently received received signal strength is greater than a second threshold, or the RF transmit power reaches a maximum RF transmit power of the wireless access point. In this way, by setting the second threshold, it can be ensured that the radio frequency transmission power of the wireless access point is not too high, so as to affect other communication quality of the wireless access point. In practical applications, the first threshold and the second threshold may be determined by evaluation. In practical applications, there may be multiple workstations associated with the wireless access point, the first monitoring module 10 is configured to continuously monitor the packet loss rate of all workstations, and the second monitoring module 40 is configured to continuously monitor the received signals for all workstations. The determination module 20 triggers the adjustment module if the packet loss rate of all workstations is less than the first threshold or the packet loss rate of all workstations is less than the first threshold and the received signal strength of all workstations is greater than the second threshold. 30. The radio frequency transmission power of the wireless access point is gradually reduced. When the packet loss rate of one of the workstations is not less than the first threshold or the received signal strength is not greater than the second threshold, the trigger adjustment module 30 increases the wireless access point step by step. RF transmit power. 3 is a flowchart of a method for adjusting radio frequency transmission power of a wireless access point according to a first embodiment of the present invention. The method mainly includes the following steps (step S302 - step S308): Step S302, first monitoring of a wireless access point The module 10 monitors the current packet loss rate of the workstation associated with it; for example, the first monitoring module 10 can continuously send a message to the workstation and receive a response (eg, an ACK response) returned by the workstation, and then pass the statistical unit time. The ratio of the number of responses received within the packet to the number of sent messages determines the packet loss rate of the workstation. In step S304, the determining module 20 determines whether the packet loss rate currently detected by the first monitoring module 10 is less than the first threshold. If yes, step S306 is performed; otherwise, step S308 is performed; for example, the first threshold may be performed in an actual application. Evaluation is ok. Step S306, the determining module 20 triggers the adjustment module 30 to reduce the radio frequency transmission power of the wireless access point by one level, and returns to the execution step 4 S302; for example, the radio frequency transmission power can be divided according to the maximum radio frequency transmission power of the wireless access point. For multiple levels, the difference between each level can be the same or different. For example, when the RF transmit power is large, the difference between each level can be increased, so that the wireless access point can be fast. Adjust to the appropriate RF transmit power; When the RF transmit power is reduced to a relatively small time, the difference between each level can be reduced, so that the RF transmit power finally used by the wireless access point is closest to the appropriate value. Step S308, the radio frequency transmission power of the wireless access point is not adjusted, and the process returns to step S302. Alternatively, as shown in FIG. 4, in step S308', the determining module 20 may also trigger the adjustment module 30 to increase the radio frequency transmission power of the wireless access point by one level, and then return to step S302 to further ensure wireless access. Data communication between the point and the workstation. In the related art, the method mainly increases the Beacon Interval, simply reduces the RF transmission power, or stops part of the PA operation to reduce the energy consumption of the wireless AP. These methods either cause the user to discover that the network process is slow, or cause radio frequency coverage. Smaller makes users unable to access the network in certain locations. In the method for adjusting the radio frequency transmission power of the wireless access point provided by the embodiment of the present invention, the wireless access point adjusts the radio frequency transmission power of the wireless access point according to the packet loss rate of the workstation, and the packet loss rate is small. Gradually lowering the RF transmit power, instead of simply lowering the RF transmit power, it can reduce the RF transmit power as much as possible while ensuring that the data communication between the wireless AP and the workstation is not affected, effectively reducing the RF transmit power. The overall energy consumption of the wireless AP. Preferably, in the foregoing step S304, when determining that the packet loss rate is less than the first threshold, the determining module 20 may further determine whether the received signal strength of the wireless access point to the workstation is greater than a second threshold, and if yes, performing the step S306. Otherwise, step S308 is performed to increase the radio frequency transmission power by one level, and return to step 4 to gather S302. This can avoid the radio transmission power adjustment of the wireless access point is too low and affect the other communication quality of the wireless access point. Preferably, in step S308, if the radio frequency transmission power has reached the maximum radio frequency transmission power of the radio access point, the adjustment module 30 no longer increases the radio frequency transmission power of the radio access point, and directly returns to the execution step 4 S302. In practical applications, there may be multiple workstations associated with the wireless access point. In this case, in the above method, the wireless access point determines that the received signal strengths of the respective workstations are greater than a second threshold, and each workstation When the packet loss rate is less than the first threshold, performing an operation of reducing the radio frequency transmit power, determining that the received signal strength of one of the workstations is not greater than the second threshold or the packet loss rate of one of the workstations is not less than the first threshold, Performing an operation of increasing the radio frequency transmit power. Or, if the received signal strength is not considered, if the packet loss rate of each workstation is less than the first threshold, the wireless access point performs the operation of reducing the radio frequency transmit power, and the packet loss rate of one of the workstations is not less than In the case of the first threshold, the wireless access point performs an operation of increasing the radio frequency transmit power. This ensures that each workstation can communicate properly with the wireless access point. In the above method, the packet loss rate of each workstation can be confirmed by the ACK of the workstation response after the wireless AP sends the message, and if there is no ACK, the packet loss is considered to occur, and the number of lost packets and the packet are counted in the unit time. The number of packets can determine the packet loss rate. Embodiment 2 FIG. 5 is a schematic diagram of an application scenario according to Embodiment 2 of the present invention. In this embodiment, only one workstation (STA) associated with a wireless access point moves, and when the STA moves from location 1 to location 2, When the location is 3, when the STA approaches the wireless AP, the wireless AP receives the signal strength and the statistical packet loss rate, and reduces the radio frequency transmission power. When the STA is far away from the wireless AP, the wireless AP detects that the received signal strength is worse. If the statistical packet loss rate increases and exceeds the threshold, the RF transmit power is increased until the packet loss rate returns to normal or enters the full power state. 6 is a flowchart of a method for adjusting radio frequency transmission power of a wireless AP according to Embodiment 2 of the present invention. The method mainly includes the following steps: Step S601: A wireless AP starts to enter a full power running state, that is, a current radio frequency of a wireless AP. The transmitting power is the maximum radio frequency transmitting power. Step S602, the STAs are associated with the wireless AP, and the wireless AP collects the packet loss rate between the STA and the STA, and obtains the current received signal strength of the STA. Step S603, the wireless AP Determining whether the packet loss rate is less than the first threshold, if yes, executing step S604, otherwise, performing step S605; step S604, the wireless AP determining whether the received signal strength is greater than a second threshold, that is, determining whether the received signal strength is good or good If yes, go to step S606, otherwise, go to step S605; Step S605, the wireless AP raises the radio frequency transmit power by one level, and returns to step S602; if the current radio frequency transmit power is the maximum radio frequency transmit power, the current one is not turned up. RF transmit power, directly returning to step 4 S602; step S606, the wireless AP reduces its current radio transmit power by one Level, returns to step S602. In the above process, after the power is increased in step S605, the packet loss rate in the communication process is monitored again. If the packet loss rate of the STA returns to the previous normal state, the transmission power is stopped to be increased, if the received signal strength does not change. If the packet loss rate is normal, the current RF transmit power can be stabilized. According to the embodiment of the present invention, when only one STA is associated with the wireless access point, the radio transmission power of the wireless access point may be adjusted according to the packet loss rate between the STA and the received signal strength of the STA. It can effectively reduce the energy consumption of wireless access points without affecting the user experience. Embodiment 3 FIG. 7 is a schematic diagram of an application scenario according to Embodiment 2 of the present invention. In this embodiment, STAs associated with a wireless access point include: STA1, STA2, and STA3. 8 is a flowchart of a method for adjusting radio frequency transmit power of a wireless AP according to Embodiment 3 of the present invention. The method mainly includes the following steps: Step S801: A wireless AP starts to enter a full power running state, that is, a current radio frequency transmit power of a wireless AP. For the maximum radio frequency transmit power; in step S802, the STA1, the STA2, and the STA3 are associated with the radio AP, and the radio AP collects the packet loss rate between the STAs and the received signal strength of each STA. Step S803, the wireless AP Determining whether the packet loss rate with each STA is less than the first threshold, if yes, executing step S804, otherwise, performing step S805; step S804, the wireless AP determines whether the received signal strengths of the respective STAs are greater than the first threshold. If yes, go to step S 806, otherwise, go to step S 805; step S805, the wireless AP raises the radio frequency transmit power by one level, and returns to step S802; if the current radio frequency transmit power is the maximum radio frequency transmit power, it does not increase The current RF transmit power is directly returned to step 4 S802; in step S806, the wireless AP reduces its current RF transmit power by one. Level, return to step S802. In the above process, after the power is increased in step S805, the packet loss rate of each STA in the communication process is monitored again. If the packet loss rate of each STA is restored to the previous normal state, the transmission power is stopped. If the received signal strength does not change and the packet loss rate is normal, the current RF transmit power can be stabilized. According to the embodiment of the present invention, when the wireless access point is associated with multiple STAs, the radio frequency transmission power of the wireless access point may be adjusted according to the packet loss rate between each STA and the received signal strength of each STA, so that Effectively reduce the energy consumption of the wireless access point without affecting the user experience. From the above description, it can be seen that in the embodiment of the present invention, the wireless access point can be based on
STA之间的丢包率和对 STA的接收信号强度自动调整自身的射频发射功率，从 而能够在不影响用户体验的情况下降低无线接入点的能耗。 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。 The packet loss rate between STAs and the received signal strength of the STA automatically adjust its own radio frequency transmission power, thereby reducing the energy consumption of the wireless access point without affecting the user experience. Obviously, those skilled in the art should understand that the above 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. Thus, 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.

Claims

权 利 要 求 书 Claim
1. 一种无线接入点的射频发射功率的调整方法， 包括： A method for adjusting radio frequency transmit power of a wireless access point, comprising:
无线接入点持续监测关联到其上的工作站的丢包率；  The wireless access point continuously monitors the packet loss rate of the workstations associated with it;
在所述丢包率小于第一阈值的情况下， 所述无线接入点逐级地降低 所述无线接入点的射频发射功率。  And in the case that the packet loss rate is less than the first threshold, the wireless access point gradually reduces the radio frequency transmission power of the wireless access point.
2. 根据权利要求 1所述的方法， 其中， 所述方法还包括： 2. The method according to claim 1, wherein the method further comprises:
所述无线接入点确定当前监测到的所述丢包率大于或等于所述第一 阈值；  Determining, by the wireless access point, that the currently detected packet loss rate is greater than or equal to the first threshold;
所述无线接入点逐级调高所述射频发射功率， 直至当前监测到的所 述丢包率小于所述第一阈值或所述射频发射功率达到所述无线接入点的 最大射频发射功率。  The wireless access point increases the radio frequency transmit power step by step until the currently detected packet loss rate is less than the first threshold or the radio frequency transmit power reaches a maximum radio frequency transmit power of the wireless access point. .
3. 根据权利要求 1或 2所述的方法， 其中， 在所述无线接入点每次降低所 述射频发射功率之前， 所述方法还包括： 所述无线接入点确定对所述工 作站的接收信号强度大于第二阈值。 The method according to claim 1 or 2, wherein before the wireless access point reduces the radio frequency transmission power, the method further comprises: determining, by the wireless access point, the workstation The received signal strength is greater than the second threshold.
4. 根据权利要求 3所述的方法， 其中， 如果所述无线接入点确定对所述工 作站的接收信号强度小于或等于所述第二阈值， 所述方法还包括： 所述 无线接入点逐级地调高所述射频发射功率， 直至所述接收信号强度大于 所述第二阈值且所述丢包率小于所述第一阈值， 或所述射频发射功率达 到所述无线接入点的最大射频发射功率。 4. The method according to claim 3, wherein: if the wireless access point determines that a received signal strength to the workstation is less than or equal to the second threshold, the method further comprises: the wireless access point Upgrading the radio frequency transmit power step by step until the received signal strength is greater than the second threshold and the packet loss rate is less than the first threshold, or the radio frequency transmit power reaches the wireless access point Maximum RF transmit power.
5. 根据权利要求 4所述的方法， 其中， 关联到所述无线接入点的工作站为 多个； 所述无线接入点确定对各个所述工作站的接收信号强度均大于所 述第二阈值， 且各个所述工作站的丢包率均小于所述第一阈值时， 执行 降低所述射频发射功率的操作， 确定对各个所述工作站之一的接收信号 强度不大于所述第二阈值或各个所述工作站之一的丢包率不小于所述第 一阈值时， 执行调高所述射频发射功率的操作。 5. The method according to claim 4, wherein: a plurality of workstations associated with the wireless access point; the wireless access point determines that received signal strengths for each of the workstations are greater than the second threshold And performing an operation of reducing the radio frequency transmit power when the packet loss rate of each of the workstations is less than the first threshold, determining that the received signal strength of one of the workstations is not greater than the second threshold or each When the packet loss rate of one of the workstations is not less than the first threshold, performing an operation of increasing the radio frequency transmit power.
6. 根据权利要求 1或 2所述的方法， 其中， 关联到所述无线接入点的工作 站为多个； 在满足各个所述工作站的丢包率均小于所述第一阈值的情况 下， 所述无线接入点执行降低所述射频发射功率的操作， 在各个所述工 作站之一的丢包率不小于所述第一阈值的情况下， 所述无线接入点执行 调高所述射频发射功率的操作。 The method according to claim 1 or 2, wherein a plurality of workstations associated with the wireless access point are multiple; if the packet loss rate of each of the workstations is less than the first threshold, The wireless access point performs an operation of reducing the radio frequency transmit power, in each of the workers In a case where the packet loss rate of one of the stations is not less than the first threshold, the wireless access point performs an operation of increasing the radio frequency transmission power.
7. 根据权利要求 1或 2所述的方法， 其中， 所述无线接入点监测所述工作 站的丢包率包括： The method according to claim 1 or 2, wherein the monitoring, by the wireless access point, the packet loss rate of the workstation comprises:
所述无线接入点向所述工作站发送报文；  Sending, by the wireless access point, a message to the workstation;
所述无线接入点接收所述工作站返回的响应；  Receiving, by the wireless access point, a response returned by the workstation;
所述无线接入点通过统计单位时间内发送 4艮文的数量与接收到的响 应的数量确定所述丢包率。  The wireless access point determines the packet loss rate by counting the number of messages transmitted in a unit time and the number of responses received.
8. —种无线接入点， 包括： 8. A type of wireless access point, including:
第一监测模块， 设置为持续监测关联到所述无线接入点的工作站的 丢包率；  a first monitoring module, configured to continuously monitor a packet loss rate of a workstation associated with the wireless access point;
判断模块， 设置为判断所述第一监测模块当前监测到的所述丢包率 是否小于第一阈值， 如果是， 则触发调整模块逐级地降低所述无线接入 点的射频发射功率；  The determining module is configured to determine whether the packet loss rate currently detected by the first monitoring module is less than a first threshold, and if yes, triggering the adjustment module to decrease the radio frequency transmit power of the wireless access point step by step;
所述调整模块， 设置为按照所述判断模块的触发调整所述无线接入 点的射频发射功率。  The adjusting module is configured to adjust a radio frequency transmit power of the wireless access point according to a trigger of the determining module.
9. 根据权利要求 8所述的无线接入点， 其中， 所述判断模块还设置为在所 述丢包率不小于所述第一阈值时， 触发所述调整模块逐级地调高所述无 线接入点的射频发射功率。 The wireless access point according to claim 8, wherein the determining module is further configured to trigger the adjusting module to increase the level by step when the packet loss rate is not less than the first threshold. RF transmit power of the wireless access point.
10. 根据权利要求 8或 9所述的无线接入点， 其中， 还包括： 10. The wireless access point according to claim 8 or 9, further comprising:
第二监测模块， 设置为持续监测所述无线接入点对所述工作站的接 收信号强度；  a second monitoring module, configured to continuously monitor the received signal strength of the wireless access point to the workstation;
所述判断模块还设置为在判断所述丢包率小于所述第一阈值且所述 接收信号强度大于第二阈值时， 触发所述调整模块逐级地降低所述无线 接入点的射频发射功率， 在判断所述丢包率不小于所述第一阈值或所述 接收信号强度不大于第二阈值时， 触发所述调整模块逐级地调高所述无 线接入点的射频发射功率。  The determining module is further configured to: when determining that the packet loss rate is less than the first threshold and the received signal strength is greater than a second threshold, triggering the adjusting module to gradually reduce radio frequency transmission of the wireless access point The determining, when the packet loss rate is not less than the first threshold, or the received signal strength is not greater than the second threshold, triggering the adjusting module to increase the radio frequency transmit power of the wireless access point step by step.
PCT/CN2011/076071 2011-06-21 2011-06-21 Wireless access point and radio-frequency emission power adjustment method thereof WO2012174714A1 (en)

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CN101854710A (en) * 2010-06-01 2010-10-06 中兴通讯股份有限公司 Wireless access point and radio-frequency emission power regulation method thereof

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Publication number Priority date Publication date Assignee Title
CN106879059A (en) * 2017-02-22 2017-06-20 新华三技术有限公司 A kind of transmission power adjustment method and device
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