CAJ | 학술논문

4G LTE网络具有高达100 Mbps的无线传输、优化的网络架构、灵活的频谱利用和优良的服务质量（ QoS）保证等优点，卫星通信系统可覆盖海域、空域及偏远地域等广大区域。基于LTE的星地融合宽带网络兼有两者的优点，可在广阔地域为用户提供更高速率的业务。在参考地面LTE网络架构及其协议栈的基础上，提出一种基于LTE网络的星地融合宽带网络的网元功能和相应协议栈设计方案，给出地面网关中演进分组核心网EPC的3种实现方案，并比较3种方案的特征。可为构建基于LTE网络的星地融合宽带网络、进一步研究网元功能分配及其协议栈优化和优选的EPC实现方案以满足不同要求等方面，提供参考与借鉴。
4G LTE망락구유고체100 Mbps적무선전수、우화적망락가구、령활적빈보이용화우량적복무질량（ QoS）보증등우점，위성통신계통가복개해역、공역급편원지역등엄대구역。기우LTE적성지융합관대망락겸유량자적우점，가재엄활지역위용호제공경고속솔적업무。재삼고지면LTE망락가구급기협의잔적기출상，제출일충기우LTE망락적성지융합관대망락적망원공능화상응협의잔설계방안，급출지면망관중연진분조핵심망EPC적3충실현방안，병비교3충방안적특정。가위구건기우LTE망락적성지융합관대망락、진일보연구망원공능분배급기협의잔우화화우선적EPC실현방안이만족불동요구등방면，제공삼고여차감。
The communication networks based on long term evolution ( LTE ) in fourth generation of mobile communication systems have the advantages such as high-speed wireless data transmission up to 100Mbps, optimized network architecture, flexible usage in spectrum and good quality of service ( QoS) guarantee. The satellite communication systems can cover large areas including marine,space and suburban fields.Therefore,the converged satellite-terrestrial broadband networks could combine the advantages of both networks together,and provide the services to the customers with wider fields and higher rate.On the basis of the terrestrial LTE network architecture and its protocols stack,the functionality of network elements and relevant protocols stack scheme for LTE-based satellite and terrestrial broadband networks are proposed.We also present the three implementation schemes of the evolved packet core (EPC) network in a terrestrial gateway,and compare the characteristics of three ones. These efforts could offer useful reference for LTE-based satellite and terrestrial broadband networks construction,further study on function assignment of each network elements,optimization of network protocols stack,and optimal EPC implementation schemes with different requirements.