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名词解释题
RSSI
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考题
WhichstatementbestdescribestheCisco2700LocationAppliancecollectionoflocation informationforwirelessdevices?()
A.allWi-FidevicesontheWLANsenddirectlyreceivedsignalstrengthindication(RSSI)informationtotheCiscoWirelessLocationAppliancethroughSNMPB.anAPcollectsRSSIinformationwhichisforwardedtowirelesscontrollersthroughLWAPP.WirelesscontrollersforwardaggregatedRSSItothelocationappliancethroughSNMPC.theAPscollectreceivedsignalstrengthindication(RSSI)informationfromallWi-FidevicesandforwardtheinformationtotheCiscoWirelessLocationAppliancethroughtheLWAPPD.theCiscoWLANcontrollersbypassthereceivedsignalstrengthindication(RSSI)informationfromallWi-FidevicestotheCiscoWirelessLocationAppliancethroughtheLWAPP
考题
下列关于RSSI描述,正确的是()。
A.RSSI是基站1.2288M频带内的反向接收场强B.RSSI的大小直接可以反应网络当前的反向负荷以及反向干扰水平C.主,分集RSSI的差值不超过10为正常D.RSSI的正常值范围为(-110~-95dB.
考题
无线设备显示的信号强度MeanRSSI可以直接体现出链路的质量,但实际由于底噪和环境、干扰相关,会时时变化;而SNR相对稳定(对于一个固定的环境和发射功率),可以认为和发射功率、设备使用的天线、设备距离、空间衰减等相关,但是当设备安装完成以后,SNR往往相对比较固定。下列关于底噪与RSSI的关系,描述正确的是()。A、在固定的网络中,如果底噪降低,则RSSI会降低;反之如果底噪提高,则RSSI会提高B、在固定的网络中,如果底噪增高,则RSSI会提高;反之如果底噪降低,则RSSI会降低C、在固定的网络中,如果底噪增高,则RSSI会降低;反之如果底噪降低,则RSSI会提高
考题
LTE系统下行功率对系统上行接收产生干扰,此干扰的一个明显特征是基站扇区主集上行RSSI功率值高于分集上行RSSI功率值,关闭功放后,主分集上行RSSI恢复正常;对于用户表现为有信号不能正常接入。
考题
BSC端对4个宏基站作TESTPOWER测试,其中()基站是正常的.A、基站A:RSSI(DBm)_A-89.3;RSSI(DBm)_B-109.3B、基站B:RSSI(DBm)_A-109;RSSI(DBm)_B-103.8C、基站C://RSSI(DBm)_A-85.5;RSSI(DBm)_B-86.8D、基站D://RSSI(DBm)_A-71.1;RSSI(DBm)_B-109.8
考题
Which statement best describes the Cisco 2700 Location Appliance collection of location information for wireless devices?()A、all Wi-Fi devices on the WLAN send directly received signal strength indication (RSSI) information to the Cisco Wireless Location Appliance through SNMPB、an AP collects RSSI information which is forwarded to wireless controllers through LWAPP. Wireless controllers forward aggregated RSSI to the location appliance through SNMPC、the APs collect received signal strength indication (RSSI) information from all Wi-Fi devices and forward the information to the Cisco Wireless Location Appliance through the LWAPPD、the Cisco WLAN controllers bypass the received signal strength indication (RSSI) information from all Wi-Fi devices to the Cisco Wireless Location Appliance through the LWAPP
考题
多选题下列关于RSSI描述,正确的是()。ARSSI是基站1.2288M频带内的反向接收场强BRSSI的大小直接可以反应网络当前的反向负荷以及反向干扰水平C主,分集RSSI的差值不超过10为正常DD.RSSI的正常值范围为(-110~-95d
考题
单选题BSC端对4个宏基站作TESTPOWER测试,其中()基站是正常的.A
基站A:RSSI(DBm)_A-89.3;RSSI(DBm)_B-109.3B
基站B:RSSI(DBm)_A-109;RSSI(DBm)_B-103.8C
基站C://RSSI(DBm)_A-85.5;RSSI(DBm)_B-86.8D
基站D://RSSI(DBm)_A-71.1;RSSI(DBm)_B-109.8
考题
判断题RSSI强度与用户数直接相关,话务忙时RSSI值低于话务闲时。A
对B
错
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