随着社会的发展和移动互联网的普及,更低的传输延时、更高的无线接入速率和高速移动环境下更平滑的切换等需求对无线通信网络提出了更高的要求。仅仅通过传统同构网络中宏小区的部署已经很难满足数据容量增大,覆盖的范围更大等要求。而且基站的位置选择和施工的难度都在加大,架设基站的成本也明显增加。在这种背景下,引入更易部署的小小区的LTE异构网开始出现并迅速发展普及。本文介绍了LTE异构网的概念、关键技术并对组网方案和部署策略提出了建议。 With the development of society and the popularization of mobile Internet, lower transmission delay, higher wireless access rate and smoother switching in high-speed mobile environment put forward higher requirements on wireless communication networks. Only through the deployment of macro cells in the traditional isomorphic network has been difficult to meet the data capacity increases, covering a larger range of requirements. Moreover, the location of the base station and the difficulty of construction are all increasing, and the cost of setting up a base station also increases obviously. In this context, the LTE heterogeneous network introduced into a more easily deployable small cell begins to emerge and is rapidly gaining popularity. This paper introduces the concept and key technologies of LTE heterogeneous network, and puts forward suggestions on the networking scheme and deployment strategy.