正确答案: B
4G
题目:2013年末,我国电信运营商获发TD-LTE牌照,开始正式发展( )业务。
解析:B
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举一反三的答案和解析:
[多选题]在实际的规划中,要根据仿真覆盖预测效果是否满足预期目标,对天线下倾角进行调整。通常调整的理由是:()
在人口密集区域满足容量要求
在人口稀疏区域满足覆盖要求
出现过覆盖或者欠覆盖现象
发生严重干扰的区域
解析:A, B, C, D
[单选题]【In the forthcoming years,Beyond-3G(B3G) environments will undoubtedly be deployed in most parts around the globe, permitting a world class solution for network interconnection, A B3G context enables the efficient cooperation of existing wireless technologies, including cellular-based(e.g. 2G/3G), broadcast-oriented(e.g. DVB)-in specific DVB-H, and Internet-based(WLAN/WMAN)networks, all relying on enhanced IP as the unifying layer. Hence, in this particular and yet to be deployed environment, mobile, systems and platforms will permit to provide enhanced services to all applications across heterogeneous access networks. This will effectively enlarge the scope of service deployment, availability and accessibility to the users】 Based on the paragraph above, it is shown that (98) will be used as the higher layer protocol to unify cellular networks ,broadcast networks and (99) networks, which is enabled by the context of (100).
enhanced IP
[单选题]下列选项中, ( )操作可能会感染病毒。
以上操作均可能
[单选题]在LTE下,EPC主要由()和PDNGW,ServingGW,HSS组成
MME
[多选题]常见的程控交换机技术指标有()、容量和扩容能力等。
话务量
呼叫处理能力
阻塞率
可靠性指标
解析:ABCD
[单选题]下列属于系统软件的是()。
数据库管理软件
[单选题]地处中雷区以上的通信局站,内部信号线长度超过50m的,应在其一侧终端设备入口处安装( )。
SPD
[多选题]会议电话业务根据不同的通话范围和服务对象,可分为()。
省级交互式会议电话
市级交互式会议电话
解析:BC
[单选题]下列设备中,( )不属于传输设备。[1分]
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