CN1298144C - A method for implementing WLAN piconet networking - Google Patents

A method for implementing WLAN piconet networking Download PDF

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CN1298144C
CN1298144C CN 03142532 CN03142532A CN1298144C CN 1298144 C CN1298144 C CN 1298144C CN 03142532 CN03142532 CN 03142532 CN 03142532 A CN03142532 A CN 03142532A CN 1298144 C CN1298144 C CN 1298144C
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access point
antenna
ap
piconet
built
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CN 03142532
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CN1567865A (en )
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单文英
杨胤嗣
杨学贤
郭大伟
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联想(北京)有限公司
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Abstract

本发明公开一种无线局域网微微网组网的实现方法,每一个接入点通过外置天线与多个移动终端互相通信,接入点与接入点之间通过外置天线互相通信,该方法还包括:A.在接入点中设置内置天线;B.根据无线局域网微微网的容量要求,确定该网所需接入点的数目和每个接入点覆盖的范围;C.设置接入点的输出功率,根据接入点的输出功率和覆盖范围,确定接入点的天线增益;D.判断接入点的天线增益是否大于等于预设值,如果是,接入点继续用外置天线收发信号,否则,切换接入点的天线,使接入点用内置天线收发信号。 Implementation of the present invention discloses a wireless local area networking piconet, each access point communication with each other through the external antenna with a plurality of mobile terminals communicating with each other, the access point and the access point through an external antenna, the method further comprising possibilities: a setting built-in antenna in an access point; B according to the capacity requirements of the wireless local area piconet to determine the scope and number required for each access point of the network covered by access point; C provided the access... output power point, based on the output power and the coverage of the access point, the access point determines the antenna gain; whether D determines the antenna gain access point is greater than equal to a preset value, if yes, continues with the access point external the antenna reception signals, otherwise, the access point antenna switch, so that the access point with built-in antenna receives signals. 该方法实现了无线局域网微微网的组网。 The method enables a wireless local area network piconet.

Description

一种无线局域网微微网组网的实现方法 Method for implementing a wireless local area networking piconet

技术领域 FIELD

本发明涉及一种无线局域网的组网方法,特别涉及一种无线局域网微微网组网的实现方法。 The present invention relates to a wireless local area networking method, particularly relates to a method for implementing a wireless local area network is a piconet.

背景技术 Background technique

无线局域网是一种遵循国际电气和电子工程师协会(IEEE)802.11协议、以电磁波作为传输媒介的局域网。 Wireless LAN is a follow International Institute of Electrical and Electronics Engineers (IEEE) 802.11 protocol, to electromagnetic waves as a transmission medium of the LAN. IEEE 802.11a和IEEE 802.11b的工作频段分别为2.4G和5G,支持的最高物理接口速率为11Mbps和54Mbps,IEEE802.11a和IEEE 802.11b采用相同的媒体接入控制协议(MAC)。 IEEE 802.11a and IEEE 802.11b are working frequency band 2.4G and 5G, a physical interface to support the maximum rate of 11Mbps and 54Mbps, IEEE802.11a and IEEE 802.11b use the same media access control protocol (MAC).

无线局域网主要由插入无线局域网卡的移动终端和接入点组成,移动终端和接入点在MAC的控制下,分享同一信道。 WLAN wireless LAN card is inserted mainly by the mobile terminals and access points, the access point and the mobile terminal under the control of the MAC, share the same channel. 多个移动终端可以和一个接入点组成中心点转发的基础设施(Infrastructure)模式,并通过接入点与有线网络或其他的接入点互联。 A plurality of mobile terminals and access points may infrastructure forwarding center point (Infrastructure) mode and the access point through a wired network or other network access points. 如图1所示,图1为一种Infrastructure模式的无线局域网组网图,其具体描述为:接入点(AP)通过无线连接与不同的移动终端相连,AP通过有线连接与有线网络连接。 1, FIG. 1 is a diagram of a wireless LAN Network Infrastructure mode, which is specifically described as: an access point (AP) is connected to a different mobile terminal through a wireless connection, the AP is connected to a wired network via a wired connection.

AP常常采用外置天线收发信号,由于外置天线的增益较高,因此,AP的覆盖范围较大。 AP transceiver external antenna signal is often used, due to the high gain of external antenna, therefore, larger coverage AP. 当在移动终端稀疏的时候,建立无线局域网,由于没有很多用户同时登陆无线网络,通信容量要求不高,此时,AP覆盖范围较大的特点是一个优点。 When the mobile terminal when the sparse, establish a wireless LAN, since there are not many users while landing a wireless network, communication capacity less demanding, this time, the AP coverage features is a large advantage. 但是,当在移动终端密集的时候,如:在开大型展示会时,建立无线局域网微微网,由于同时有很多用户登陆无线网络,所以要求在小范围内使用多个AP以提高通信速率,并且要求控制AP的覆盖范围来防止不同AP之间的同信道干扰问题,此时,AP覆盖范围较大的特点就是一个缺点。 However, when the mobile terminal is time-intensive, such as: large exhibition in the open, to establish a piconet wireless LAN, since there are many simultaneous users login wireless network, it requires the use of a plurality of AP in a small range to increase the communication rate, and the control range of the AP coverage required to prevent co-channel interference problems between different AP, this time, the coverage AP is characterized by a large disadvantage. 当由于AP的覆盖范围大所导致的AP之间同信道干扰严重的时候,就可能不能实现用AP建立无线局域网微微网。 Between the AP when the AP due to the large coverage area caused severe when co-channel interference, it may not be achieved with a piconet A wireless LAN AP.

由上述描述可以看出,如何控制AP的覆盖范围,使AP的覆盖范围适应不同无线局域网的组网方式,特别是适应无线局域网微微网的组网,是一个亟待解决的问题。 As can be seen from the above description, how to control the coverage of the AP, so that the coverage of the AP accommodate different wireless LAN networking, wireless local area network to adapt a particular piconet, it is a serious problem.

发明内容 SUMMARY

由鉴于此,本发明提供一种无线局域网微微网组网的实现方法,该方法实现了无线局域网微微网的组网。 In view of this, the present invention provides a method for implementing a wireless local area network is a piconet, the method is implemented a wireless local area network piconet.

根据上述目的,本发明的具体实施方案为:一种无线局域网微微网组网的实现方法,每一个接入点通过外置天线与多个移动终端互相通信,接入点与接入点之间通过外置天线互相通信,该方法还包括:A、在接入点中设置内置天线;B、根据无线局域网微微网的容量要求,确定该网所需接入点的数目和每个接入点覆盖的范围;C、设置接入点的输出功率,根据接入点的输出功率和覆盖范围,确定接入点的天线增益;D、判断接入点的天线增益是否大于等于预设值,如果是,接入点继续用外置天线收发信号,否则,切换接入点的天线,使接入点用内置天线收发信号。 According to the above-described object, the specific embodiments of the invention are: a method for implementing a wireless local area networking piconet, each access point between the external antenna and the plurality of mobile terminals communicate with each other through the access point and the access point communicate with each other through the external antenna, the method further comprises: a, built-in antenna provided in the access point; B, based on the capacity requirements of the wireless LAN piconet, the network access point to determine the required number of each access point and the coverage; C the output power, for the access point, based on the output power and the coverage of the access point, the access point determines the antenna gain; D if the antenna gain, determines the access point is greater than equal to a preset value, if , the access point continues to send and receive signals with the external antenna, otherwise, the access point antenna switch, so that the access point with built-in antenna receives signals.

在所述的接入点中设置射频插座开关,该射频插座开关对接入点中的内置天线和外置天线进行切换。 Radio-frequency switch is provided in the access point, the radio access point switching socket built-in antenna and the external antenna switch.

所述的接入点内置天线为内置微带天线。 The access point is built microstrip antenna built-in antenna.

所述的接入点内置微带天线为倒L形金属天线。 The access point built microstrip antenna is an inverted L-shaped metal antenna.

所述的预设值为接入点外置天线的最小增益。 The default value for the access point of the external antenna minimum gain.

所述的步骤B进一步包括:b1、无线局域网微微网所需接入点的数目为无线局域网微微网的容量除以接入点的容量得到的值;b2、每个接入点覆盖的范围为该无线局域网微微网覆盖范围除以接入点的数目得到的值。 Said step B further comprising: b1, the required number of wireless local area network access point is a pico-value capacity divided by the capacity of the wireless LAN access point piconet obtained; ranges b2, for each access point covers the obtained value of the number of wireless local area piconet coverage area of ​​the access point is divided.

在所述的接入点分别设置两个内置微带天线和两个外置天线,用于空间分集接收。 Microstrip antennas provided two internal and two external antennas at the access point for spatial diversity reception.

对所述接入点的内置天线配置阻抗匹配网络。 Built-in antenna of the access point impedance matching network configuration.

该方法还包括:采用分布参数匹配法、集总参数匹配法或天线形状匹配法配置阻抗匹配网络。 The method further comprising: using the distributed parameter matching method, a matching method or a lumped shape matching antenna impedance matching network configuration.

所述确定接入点天线增益进一步包括:c1、根据圆面积公式利用接入点覆盖范围计算出接入点覆盖半径;c2、20乘以以10为底接入点的工作频率的对数后加上92.4得到的值,该值再加上20乘以以10为底接入点覆盖半径的对数得到电波自由空间损耗;c3、设置接入点的输出功率,接入点天线增益为移动终端接收灵敏度减去接入点输出功率和移动终端的天线增益后,再加上电波自由空间损耗和通信衰落储备得到的值。 After c2,20 multiplied by the logarithm to the base 10 of the access point operating frequency; c1, the access point coverage radius is calculated using the access point coverage area of ​​a circle according to the formula: determining said antenna gain access point further comprises 92.4 plus the value obtained by multiplying the value 20 plus the base 10 logarithm of the access point to obtain radio coverage radius of free space loss; C3, the output power for the access point, the access point for the mobile antenna gain after receiving sensitivity of the antenna gain by subtracting the output power of the access point and the mobile terminal, add the value of the radio wave communication and free space loss fade margin obtained.

本发明提供一种无线局域网微微网组网的方法,由于建立无线局域网微微网的重要设备为AP,而AP是否能提供无线局域网微微网所需的比较小的覆盖范围成为是否能实现无线局域网微微网组网的关键,本发明在AP上采用内置微带天线和外置天线相结合的方法,当移动终端密集的时候,多个AP采用内置微带天线进行短距离的信号收发,在提高整个无线局域网容量的同时防止了AP之间同信道的干扰,实现无线局域网微微网的组网;当移动终端稀疏的时候,AP采用外置天线进行通信,提高无线局域网中AP的覆盖范围,减少了无线局域网中AP的数目,节约了成本。 The present invention provides a wireless local area networking piconet method, since important establish wireless LAN piconet an AP, while the AP it can provide a relatively small coverage desired piconet wireless LAN can be realized whether the wireless LAN pico key network construction, the method of the present invention is built using microstrip antenna and external antenna combining on AP, when the mobile terminal are dense, a plurality of microstrip antenna with built-AP signal transmitting and receiving a short distance, in the improved overall WLAN capacity while preventing interference between co-channel AP, wireless local area network implemented piconet; sparse time when the mobile terminal, AP communicate using an external antenna, to improve coverage of the wireless LAN AP, reducing the number of wireless LAN AP, the cost savings.

附图说明 BRIEF DESCRIPTION

图1为一种Infrastructure模式的无线局域网组网图。 FIG 1 is a diagram of a wireless LAN Network Infrastructure mode.

图2为本发明无线局域网微微网的组网图。 FIG Network WLAN piconet FIG. 2 of the present invention.

图3为无线局域网不重叠的三个组网信道框图。 3 is a block diagram illustrating three channel wireless LAN networking channels do not overlap.

图4为无线局域网微微网的组网实现方法流程图。 FIG 4 is a flowchart of wireless LAN networking implementation piconet.

图5为一种无线局域网微微网中AP实施例的内部框图。 5 is an internal block diagram of an embodiment AP in a wireless LAN piconet.

具体实施方式 detailed description

为了使本发明的目的、技术方案和优点更加清楚明白,以下举实施例并参照附图,对本发明进一步详细说明。 To make the objectives, technical solutions, and advantages of the present invention will become apparent from the following embodiments and with reference to the accompanying drawings, the present invention is further described in detail.

当一个地区移动终端密集的时候,也就是有多个用户同时登陆互联网,为了提高通信容量,在该地区采用无线局域网微微网的组网方式,其组网方式如图2所示,其具体描述为:该无线局域网微微网中含有多个AP,每个AP通过无线连接与不同的移动终端相连,AP与AP之间的连接方式可以为有线连接方式或者无线连接方式。 A dense area when the mobile terminal when there is a plurality of users simultaneously access the Internet, in order to improve communication capacity, the use of wireless local area networking piconet in the area, which the networking shown in Figure 2, the detailed description thereof to: the wireless LAN contains a plurality of piconet AP, each AP is connected to a different mobile terminal through a wireless connection, connection between the AP and the AP may be a wired connection or a wireless connection.

本发明以工作在2.4GHz工作频段的无线局域网微微网说明该网的组成方式:在2.4GHz工作频段无线局域网微微网有14个信道可以进行工作,可工作的14个信道的中心频率为2412MHz到2484MHz,前12个信道频率间隔为5MHz,即前12信道的频点分别为2412MHz、2417MHz、2422MHz、...,第13、14信道为日本采用的信道,频点为2472MHz、2484MHz。 The present invention is to work 2.4GHz operating band wireless LAN piconet described composition embodiment of the network: in the 2.4GHz working band wireless LAN piconet has 14 channels can work, can work 14 channel center frequency of 2412MHz to 2484 MHz, the first 12 channel spacing is 5MHz, i.e., the first 12 frequency channels are 2412MHz, 2417MHz, 2422MHz, ..., 13 and 14 of the channel is a channel used in Japan, frequency is 2472MHz, 2484MHz. 但是,无线局域网微微网采用直序扩频的调制方式,其信号带宽为22MHz,加上3MHz的频率间隔保护,避免同频干扰的实际组网频点仅有三个频点:1信道2412MHz,6信道2437MHz,11信道2462MHz,因此,当无线局域网微微网进行组网时,为了避免同频信道之间的干扰,同一地区也只能采用3个AP的3个频点进行组网,如图3所示,图3为无线局域网不重叠的三个组网信道框图。 However, using WLAN piconet direct sequence spread spectrum modulation, the signal bandwidth is 22MHz, plus the guard interval 3MHz frequency to avoid interference with the frequency of the actual network frequency has only three frequency: 1 channel 2412MHz, 6 channel 2437MHz, 11 channel 2462MHz, thus, when the wireless local area network piconet, in order to avoid interference between the co-channel, using the same area and only 3 frequency points AP in the network 3, 3 as shown in FIG. 3 is a block diagram illustrating three channel wireless LAN networking channels do not overlap.

如果采用3个AP利用3个频点进行组网,对于用户密集的无线局域网微微网,其所提供的通信容量是远远不能满足要求的;如果采用在多个AP使用同一个频点进行组网,由于AP具有一定的覆盖范围,在某个AP的覆盖范围内设置另一个同一频点的AP将导致无线局域网微微网中出现同频信道的干扰。 If AP 3 using three frequencies for networking, the user wireless LAN dense piconet, it provides a communication capacity can not meet the requirements; if using the same frequency for a plurality of groups AP network, since the AP has a certain coverage, disposed within the coverage of an AP to another AP in the same frequency will cause co-channel interference occurs in the wireless local area network piconet.

降低功率可以改变AP的覆盖范围,从而解决无线局域网微微网中出现同频信道干扰的问题。 Reducing the power range of the AP coverage may be varied in order to address co-channel interference in a wireless local area piconet problems. 但是,为了满足IEEE 802.11b协议和杂散的要求,AP的功率无法无限制地下降,目前AP最小功率可以调节到6dBmw,运用该功率可以降低AP的覆盖范围,但是对于组建无线局域网微微网,使用最小功率的AP覆盖仍然偏大,仍然会引起无线局域网微微网中的AP之间出现同频干扰。 However, to meet the requirements of the IEEE 802.11b protocol and stray, the AP can not be unlimited power decreases, the current can be adjusted to minimum power AP 6dBmw, using the power range of the AP coverage may be reduced, but for the formation of the wireless LAN piconet, AP coverage using the minimum power is still too large, still cause co-channel interference between WLAN AP in a piconet.

因此,本发明在AP中采用了内置微带天线和外置天线相结合的组合方式。 Accordingly, the present invention employs a combination microstrip antenna and external antenna built-in combination in an AP. 组建无线局域网微微网时,根据无线局域网微微网的容量要求,确定AP的数目和AP的覆盖范围,再根据AP的覆盖范围确定使用AP的微带内置天线或外置天线:当无线局域网微微网中AP需要覆盖的范围小时,采用AP的内置微带天线进行收发信号;当无线局域网微微网中AP需要覆盖的范围大时,采用AP的外置天线收发信号。 When the wireless LAN set up a piconet, according to the capacity requirements of the wireless LAN piconet, determining the number and range of the AP coverage of the AP, then the AP determines to use a microstrip antenna or the external antenna built according to the coverage range of the AP: When the WLAN piconet AP needs to cover the range of hours, with the built-AP microstrip antenna for transmitting and receiving a signal; when a large range of the wireless LAN AP piconet to be covered, the AP uses external antenna send and receive signals.

如图4所示,图4为无线局域网微微网的组网实现方法流程图,其具体实现过程为:步骤400,在AP中设置内置微带天线和可以切换AP中的微带天线和外置天线的射频插座开关;步骤401,根据通信容量的要求确定AP的数目,通信容量是以每平方公里的带宽统计的,假设每个地区有两种情况:通信容量较高时每平方公里的带宽为Vhigh Mbps,通信容量较低时每平方公里的带宽为Vlow Mbps;步骤402,根据AP的数目确定每个AP的覆盖范围;步骤403,设置AP的输出功率,根据AP的输出功率与覆盖范围,确定AP的天线增益;步骤404~406,由于AP外置天线的最小增益最小只能到2dB,所以判断AP的天线增益是否大于等于2dB,如果AP的天线增益大于等于2dB,转换射频插座开关,使AP选择外置天线收发信号;如果AP的天线增益小于2dB,转换射频插座开关,使AP选择内置微带天线收发信号; 4, a wireless local area networking 4 piconet FIG flowchart of a method implemented, the specific implementation process is as follows: Step 400, the built-in microstrip antenna disposed in the AP and the AP may switch and external microstrip antenna RF antenna switch socket; step 401, according to the requirements of the communication capacity determines the number of the AP, the communication capacity is bandwidth per square statistics, each region is assumed that there are two cases: when the bandwidth per square kilometer high communication capacity is Vhigh Mbps, the communication capacity is low bandwidth per square kilometer to Vlow Mbps; step 402, determination of the coverage of each AP according to the number of the AP; step 403, set the output power of the AP, according to the output power range of the AP coverage determining AP antenna gain; steps 404 to 406, since the external antenna AP minimum gain to a minimum only 2dB, it is determined whether the AP is greater than or equal 2dB antenna gain, the antenna gain is greater than if the AP is equal to 2dB, a radio frequency conversion switch socket the AP to select the external antenna reception signals; AP if the antenna gain is less than 2dB, RF converter outlet switch, select an AP built microstrip antenna reception signals; 步骤407,确定AP选择的天线后,确定AP最终的输出功率,完成无线局域网微微网的组网。 Step 407, after determining the selected antenna AP, AP determines the final output power, wireless local area network is completed piconet.

在AP中设置内置微带天线,该微带天线的基本结构为:在损耗和厚度都很小的介质衬底两面分别敷设金属底板和金属贴片,形成辐射体。 AP provided in microstrip antenna built into the basic structure of the microstrip antenna is: and the thickness is very small in the loss of both surfaces of the substrate and the metal base plate medium, respectively, laid metal patch radiators are formed. 贴片可以为具有规则形状的面积单元,如:矩形、圆形和圆环等,这种由面积贴片单元组成的微带天线称为微带贴片天线;贴片也可以为窄长条形的薄片振子,这种天线称为微带振子天线。 The patch may be a unit area having a regular shape, such as: rectangular, circular rings and the like, by the area of ​​such a patch microstrip antenna units is called microstrip patch antenna; patch may be a reed sheet-shaped transducer, which is called a microstrip antenna dipole antenna. 不同形状的导体贴片形成不同的辐射方向性。 Different shapes of conductor patches forming different radiation directivity.

微带天线通常采用微带传输线馈电,也可采用同轴线馈电。 Microstrip antennas are usually fed microstrip transmission lines, coaxial feed may be employed. 馈电方式与天线结构决定了辐射波的极性化方式。 And the antenna feed structure electrically determines the polarity of the radiation mode.

与AP的外置天线相比,AP的内置微带天线具有以下优点:尺寸小,重量轻,价格低和可移动性好;馈电网络、匹配网络可与天线结构一起制成,适合大批量生产;容易实现圆极化,双频段,双极化等多功能。 Compared with the AP external antenna, a microstrip antenna built-AP has the following advantages: small size, light weight, low price and good mobility; feed network, the matching network may be made with the antenna structure suitable for mass production; easy to achieve circular polarization, dual-band, dual-polarized and other multi-functional. 但是,微带天线也有缺点,导致在某种场合无法应用:辐射单元具有谐振特点,频带宽度很窄;存在导体和介质的损耗;功率容量小,只能用于小功率场合,性能受基片材料影响大。 However, the microstrip antenna has its drawbacks, resulting in some occasions can not be applied: a radiation unit having a resonance characteristic, a very narrow bandwidth; conductor loss and the presence of the media; small power capacity, can only be used for low power applications, the performance of the substrate by materials great impact.

在无线局域网微微网中AP工作在2.4GHz或5.7GHz,频带宽度为22GHz,属于窄带通信,AP可以选择内置微带天线。 In a wireless LAN AP piconet operate in the 2.4GHz or 5.7GHz, bandwidth is 22GHz, belonging to the narrow-band communications, AP can choose microstrip antenna built. 如:AP选择微带天线或倒L形金属天线。 Such as: AP selection microstrip antenna or an inverted L-shaped metal antenna.

AP有了内置微带天线,必须设置该内置微带天线的阻抗匹配网络,没有该阻抗匹配网络不仅会影响到内置微带天线的辐射效率,而且会影响发射单元的工作,降低接收灵敏度。 With the built-AP antenna, microstrip antenna built must set the impedance matching network, which does not only affect the impedance matching network built microstrip antenna radiation efficiency, but will affect the transmitting unit, the receiving sensitivity is lowered.

设置内置微带天线的阻抗匹配有多种方法:第一种方法,分布参数匹配法:一定结构的传输线具有阻抗变换特性,馈线与天线之间采用一定宽度的印制板微带线或微带线网络可获得匹配作用,由于微带线所占的印制板面积大,通常的移动设备不适用。 Built-impedance microstrip antenna disposed in a variety of methods: the first method, distributed parameter matching method: a transmission line structure having a certain characteristics impedance transforming, using a width of a microstrip line printed circuit board or between the microstrip feed line and the antenna line matching network effect obtained due to a large PCB area occupied by the microstrip line, a mobile device typically does not apply.

第二种方法,集总参数元件匹配法:史密斯阻抗圆图表明,在馈线与天线之间并联或串联一定数值的集总参数元件,可达到天线与馈线间的阻抗匹配,这种方法大大减小了印制板的面积,本发明中的AP常常采用该方法。 The second method, lumped element matching method: Smith impedance FIG show lumped element between the antenna and the feeder line in series or in parallel to a certain value, the impedance matching can be achieved between the antenna and the feeder, this method greatly reduce small area of ​​the printed circuit board, the present invention is the method often used AP.

第三种方法,天线形状匹配法,内置微带天线的特性阻抗与内置微带天线的宽度、形状有关,改变内置微带天线的宽度、形状或馈电的位置,也可以获得阻抗匹配。 The third method, matching the shape of the antenna, the characteristic impedance of microstrip antenna built related to the width of the microstrip antenna built, the shape, the width of the microstrip antenna built-changing, shape or position of feed, impedance matching can be obtained.

为了可以切换AP的内置微带天线和外置天线,本发明提供了射频插座开关,该射频插座开关为了射频传输的连续性,一般安装在阻抗匹配网络后,射频传输线的终端上。 In order to switch the AP antenna built-in and external microstrip antenna, the present invention provides a receptacle RF switch, the RF switch socket for continuity of radio frequency transmission, typically mounted in the impedance matching network, RF transmission line on the terminal. 该射频插座开关的电压驻波比小于1.8,为了保证射频插座开关的损耗低性,损耗值小于0.5dB。 The RF voltage standing wave ratio of less than 1.8 socket switch, in order to ensure low-loss radio frequency switch socket loss of less than 0.5dB.

通常AP外置天线的接口均为50欧姆标准接口,因此根据AP的覆盖范围选择外置天线时,采用一定增益的全向天线,如:通常采用增益为3dB的鞭状天线或采用增益为8dB的鞭状天线。 Typically AP interfaces are external antenna 50 ohm standard interface, in accordance with the coverage AP when external antenna selection, the use of certain omnidirectional antenna gain, such as: usually 3dB gain or using the whip antenna gain of 8dB the whip antenna.

为了达到AP空间分集接收的效果,克服电波传播的多径衰落,可以采用收发分开的两个内置微带天线和两个外置天线,其中,两个内置微带天线之间的距离选择为四分之三波长,最好为四分之五的波长。 In order to achieve space diversity reception AP effect, to overcome multipath fading radio propagation, two separate transceiver built-in microstrip antennas and two external antenna may be employed, wherein a distance between the selected two internal microstrip antennas is four three-quarters wavelength, preferably a wavelength of five quarters. 如图5所示,图5为一种无线局域网微微网中AP实施例的内部框图,其具体描述为:当发射信号时,AP需要发射的信号通过RJ45接口、以太网收发器、协议转换器、基带信号处理器、信号调制解调器、收发切换器和功率放大器传输到射频插座开关,根据该无线局域网微微网需要的输出功率大小,选择内置微带天线或外置天线,将射频插座开关切换到相应的位置,通过内置微带天线或外置天线将该信号发射到无线局域网微微网中。 5, FIG. 5 is an internal block diagram of a wireless LAN AP piconet embodiment, detailed description thereof is: when transmitting a signal, the signal needs to be transmitted through the AP RJ45 interface, an Ethernet transceiver, protocol converters , the baseband signal processor, a modem signal, switching the transceiver to transmit RF power amplifier and a switch receptacle, in accordance with the output power of the wireless local area piconet need, select the built microstrip antennas or external antennas, the RF switch to a respective socket position, transmitted to the wireless LAN through the built-piconet microstrip antenna or the external antenna signal.

当接收信号时,根据该无线局域网微微网需要的输出功率大小,选择内置微带天线或外置天线,将射频插座开关切换到相应的位置,通过内置微带天线或外置天线接收无线局域网微微网的信号,该接收的信号通过接收链路分集切换、收发切换器、信号调制解调器、基带信号处理器、协议转换器、以太网收发器和RJ45接口接入到AP,AP接收该信号。 When the reception signal, based on the output power level of the wireless LAN piconet need, select the built microstrip antennas or external antennas, a radio frequency switch socket to the appropriate location, received by the built-in wireless LAN microstrip antenna or external antenna pico signaling network, the received signal by receiving a partial handover link set, the switching transceiver, a modem signal, a baseband signal processor, protocol converters, and RJ45 Ethernet transceiver interface access to the AP, AP receives the signal.

电波传播受电磁环境、地形环境和地物环境等的影响,在建立无线局域网微微网时,通常要首先进行环境的电磁测试和了解地形地物,选择合适的电波传播模型,对接入点基站的覆盖范围进行计算与估测,最后进行实际的测试,确定无线局域网的组网。 The radio wave propagation environment affected by electromagnetic, terrain and other environmental feature, when a wireless LAN piconet, usually tested first electromagnetic environment and understanding of terrain, select the appropriate wave propagation model, access point base station coverage is calculated with the estimated last actual test, to determine the wireless LAN network.

以下举具体实例说明本发明:为了便于分析与计算,假设电波传播模型为自由空间传播,假设移动端接收灵敏度为-90dBm(1Mbps),则AP的覆盖范围半径R计算如下:Ls=92.4+201gf(GHz)+201gR(Km); (1)Rssenstivity=Papout+Gap+Gstation-Ls-Lr; (2)其中,Ls为电波自由空间损耗,Lr为通信衰落储备,此处设为15dB,f(GHz)为工作频率,此处按照2.45GHz计算,R(Km)为AP的覆盖范围半径;Rssenstivity为移动端接收灵敏度,Papout为接入点输出功率,Gap为接入点天线增益;Gstation为移动端的天线增益,移动端天线增益为0dB。 For the following specific examples illustrate the invention: In order to facilitate analysis and calculation, it is assumed propagation model of radio wave propagation is free space, it is assumed the mobile terminal receiving sensitivity of -90dBm (1Mbps), the AP coverage radius R is calculated as follows: Ls = 92.4 + 201gf (GHz) + 201gR (Km); (1) Rssenstivity = Papout + Gap + Gstation-Ls-Lr; (2) where, Ls is the free space loss wave, Lr of fade margin for the communication, here set to 15dB, f ( GHz) is the operating frequency, 2.45GHz here calculated in accordance, R (Km) of the radius of the coverage of the AP; Rssenstivity receiving sensitivity of the mobile terminal, Papout output power for the access point, Gap antenna gain access point; Gstation mobile end of the antenna gain, the antenna gain of the mobile terminal 0dB.

根据公式(1)和公式(2),已知AP的覆盖范围半径R可以计算出Ls,进一步可以计算出AP的天线增益;已知AP的天线增益,可以计算出Ls,进一步可以计算出AP的覆盖范围半径。 According to the formula (1) and formula (2), a known AP coverage radius R can be calculated Ls, further can calculate the antenna gain of the AP; AP known antenna gain, can be calculated Ls, further AP can be calculated coverage radius.

设置一个地区每平方公里要求的通信容量最低为30Mbps,最高为300Mbps,针对这两种情况进行分析。 Setting per square kilometer region requires a minimum communication capacity of 30Mbps, up to 300Mbps, analyzed for both cases.

当该地区每平方公里要求的通信容量为30Mbps,由于AP提供的最大容量为11Mbps,因此该地区需要设置3个AP。 When 30Mbps, since the maximum capacity provided by the AP to 11Mbps, and therefore the area AP 3 to set the communication capacity per square area is required. 每个AP覆盖范围为0.333平方公里,根据圆面积公式可以计算出每个AP覆盖范围的半径为316m。 Each AP coverage of 0.333 square kilometers, each AP may be calculated according to the coverage radius of the circle area formula 316m. 设置每个AP的输出功率为12.5dBm,利用公式(1)和公式(2)计算得到天线增益为2.5dB,即采用AP中的外置天线即可,如:采用辫状天线。 Each AP setting output power of 12.5dBm, using the equation (1) and (2) the antenna gain is 2.5dB calculated, i.e., the AP can use an external antenna, such as: use of braided antenna.

当该地区每平方公里要求的通信容量为300Mbps,由于AP提供的最大容量为11Mbps,因此该地区需要设置28个AP。 When 300Mbps, since the maximum capacity provided by the AP to 11Mbps, and therefore the area AP 28 to set the communication capacity per square kilometer area is required. 每个AP覆盖范围为0.0357平方公里,根据圆面积公式可以计算出每个AP覆盖范围的半径为107m。 Each AP coverage of 0.0357 square kilometers, each AP may be calculated according to the coverage radius of the circle area formula 107m. 通过减小AP的功率降低AP的覆盖范围,由于杂散和发射频谱等因素的影响,AP的功率最小可设置为6dBm,假设仍然采用增益为2.5dB的外置天线,根据公式(1)和公式(2)可以计算得出AP的覆盖范围为150m,这比实际需要的覆盖范围大了1.5倍,不能满足实际无线局域网微微网的组网需要,因此必须降低天线增益,采用内置微带天线进行信号的收发工作,通常内置微带天线增益为0dB,根据公式(1)和公式(2)计算得到AP输出功率为5.69dBmW,与AP的最低输出功率基本相等,基本满足无线局域网微微网的组网需要。 By reducing the power range of the AP coverage AP is reduced due to spurious factors such as spectrum and emission, the AP can be set to the minimum power 6dBm, still using the gain 2.5dB assuming the external antenna, according to the formula (1) and equation (2) can be calculated as the coverage of the AP 150m, which is larger than the actual coverage required by 1.5 times, can not meet the actual needs wireless local area network piconet, it is necessary to reduce the antenna gain, with built-in microstrip antenna for sending and receiving a signal, usually built microstrip antenna gain is 0dB, according to the formula (1) and (2) calculate the output power AP 5.69dBmW, substantially equal to the lowest output power of the AP, the wireless LAN basically meet the piconet networking needs.

调节AP的功率是调节覆盖范围的一种方法,设置AP的功率不同,AP的覆盖范围也不同,通常AP的功率可以设置为5个等级,因此在AP的外置天线增益一定时,AP有5种覆盖范围可选。 AP is a power adjustment method for adjusting the coverage provided different power AP, different coverage range of the AP, the AP generally power levels may be set to 5, and therefore some external antenna gain when the AP, AP have 5 kinds of optional coverage. 当AP中设置了内置微带天线,AP又增加了5种覆盖范围可以进行选择。 When the AP is set in the built-in microstrip antenna, it added five AP coverage ranges may be selected. 由此可知,本发明在AP中设置内置天线提高了AP组网的灵活性。 It can be seen, the present invention is provided built-in antenna increases the flexibility of the AP in the AP network.

本发明提供无线局域网微微网中的AP同时具有外置天线和内置微带天线,当移动终端密集时,AP采用内置微带天线进行收发信号,避免了AP之间同频信道的干扰问题;当移动终端稀疏时,AP采用外置天线进行收发信号,在固定的地区减少了AP的数量,节约了成本。 The present invention provides a wireless LAN AP piconet simultaneously with the external antenna and the built-in antenna, when the mobile terminal dense, AP microstrip antenna with built-in signal transmission and reception, to avoid the problem of co-channel interference between the AP; when when the mobile terminal sparse, AP use an external antenna for transmitting and receiving a signal, the number of AP in a fixed region, cost savings. 更进一步的,在AP中设置内置微带天线,可以防止由于在未接外置天线的情况下给AP加电导致的AP空载工作从而烧毁AP问题。 Still further, the AP is provided in the built-in antenna, the work load can be prevented in the case where AP is not connected to an external antenna, thereby resulting in power AP AP burning problem.

以上所述仅为本发明的较佳实施例而已,并不用以限制本发明,凡在本发明的精神和原则之内所做的任何修改、等同替换和改进等,均应包含在本发明的保护范围之内。 The above are only preferred embodiments of the present invention but are not intended to limit the present invention, where any modifications within the spirit and principle of the present invention, equivalent substitutions and improvements should be included in the present invention. within the scope of protection.

Claims (10)

  1. 1.一种无线局域网微微网组网的实现方法,每一个接入点通过外置天线与多个移动终端互相通信,接入点与接入点之间通过外置天线互相通信,其特征在于,该方法还包括:A、在接入点中设置内置天线;B、根据无线局域网微微网的容量要求,确定该网所需接入点的数目和每个接入点覆盖的范围;C、设置接入点的输出功率,根据接入点的输出功率和覆盖范围,确定接入点的天线增益;D、判断接入点的天线增益是否大于等于预设值,如果是,接入点继续用外置天线收发信号,否则,切换接入点的天线,使接入点用内置天线收发信号。 A wireless LAN implementation piconet network, each access point communication with each other through the external antenna, characterized in that between the external antenna through mutual communication with a plurality of mobile terminals, the access point and the access point the method further includes: a, is provided in the access point built-in antenna; B, based on the capacity requirements of the wireless local area piconet to determine the range of the required number of network access points and each access point covers; C, output power for the access point based on the output power and the coverage of the access point to determine the antenna gain access point; D if the antenna gain, determines the access point is greater than equal to a preset value, if yes, the access point continues to send and receive signals with the external antenna, otherwise, the access point of the antenna switch, so that the access point with built-in antenna receives signals.
  2. 2.如权利要求1所述的方法,其特征在于,在所述的接入点中设置射频插座开关,该射频插座开关对接入点中的内置天线和外置天线进行切换。 2. The method according to claim 1, characterized in that the outlet is provided a radio frequency switch according to the access point, the radio access point switching socket built-in antenna and the external antenna switch.
  3. 3.如权利要求1所述的方法,其特征在于,所述的接入点内置天线为内置微带天线。 The method according to claim 1, wherein said access point is built microstrip antenna built-in antenna.
  4. 4.如权利要求3所述的方法,其特征在于,所述的接入点内置微带天线为倒L形金属天线。 4. The method according to claim 3, characterized in that said access point built microstrip antenna is an inverted L-shaped metal antenna.
  5. 5.如权利要求1所述的方法,其特征在于,所述的预设值为接入点外置天线的最小增益。 5. The method according to claim 1, wherein said predetermined minimum value of the gain of the external antenna access point.
  6. 6.如权利要求1所述的方法,其特征在于,所述的步骤B进一步包括:b1、无线局域网微微网所需接入点的数目为无线局域网微微网的容量除以接入点的容量得到的值;b2、每个接入点覆盖的范围为该无线局域网微微网覆盖范围除以接入点的数目得到的值。 6. The method according to claim 1, wherein said step B further comprising: b1, desired piconet wireless LAN access point divided by the number of access points for wireless LAN capacity of the capacity of the piconet value obtained; ranges b2, covering each access point coverage value range divided by the number of access points for wireless local area obtained piconet.
  7. 7.如权利要求1所述的方法,其特征在于,在所述的接入点分别设置两个内置微带天线和两个外置天线,用于空间分集接收。 7. The method according to claim 1, wherein, in said access points are provided two internal and two external antenna microstrip antennas for space diversity reception.
  8. 8.如权利要求1所述的方法,其特征在于,对所述接入点的内置天线配置阻抗匹配网络。 8. The method according to claim 1, wherein the internal antenna of the access point impedance matching network configuration.
  9. 9.如权利要求8所述的方法,其特征在于,该方法还包括:采用分布参数匹配法、集总参数匹配法或天线形状匹配法配置阻抗匹配网络。 9. The method according to claim 8, characterized in that, the method further comprising: using the distributed parameter matching method, a matching method or a lumped shape matching antenna impedance matching network configuration.
  10. 10.如权利要求1所述的方法,其特征在于,所述确定接入点天线增益进一步包括:c1、根据圆面积公式利用接入点覆盖范围计算出接入点覆盖半径;c2、20乘以以10为底接入点的工作频率的对数后加上92.4得到的值,该值再加上20乘以以10为底接入点覆盖半径的对数得到电波自由空间损耗;c3、设置接入点的输出功率,接入点天线增益为移动终端接收灵敏度减去接入点输出功率和移动终端的天线增益后,再加上电波自由空间损耗和通信衰落储备得到的值。 10. The method according to claim 1, wherein said determining the antenna gain access point further comprises: c1, the access point coverage radius is calculated using the access point coverage area of ​​a circle according to the formula; c2,20 by after the value of the number of access points to the base 10 of the operating frequency of 92.4 obtained by adding the multiplied value plus 20 to the base 10 logarithm of the access point coverage radius of a radio wave to obtain free space loss; C3, setting the output power of the access point, the access point after receiving sensitivity of the antenna gain of the antenna gain of the output power of the access point and the mobile terminal by subtracting a mobile terminal, add the value of the radio wave communication and free space loss fade margin obtained.
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