With the rapid development of satellite constellations and mobile devices, multimedia-content transfer in space–air–terrestrial networks (SATNs) has become increasingly popular. Governed by the current internet protocol-based architecture and the distance between the space and the ground, real-time transmissions of multimedia encounter an enormous challenge. Recently, named data networking has been considered to be a promising approach for solving this problem in SATN scenarios. However, a new issue, producer and consumer mobility management, arises in this approach. In this paper, we propose a location prediction-based scheme to reduce the round-trip time during the handover process and further enhance the system throughput, as well as to enable the producer and consumer to simultaneously move from an old access point (AP) to a new AP. Moreover, the proposed scheme can be applied in two kinds of SATN scenarios. Finally, the effectiveness of the proposed scheme is verified by simulations.

随着卫星星座和移动设备的快速发展，天-空-地网络（SATN）中的多媒体内容传输变得越来越流行。在当前基于互联网协议的架构和空间与地面之间的距离的制约下，多媒体的实时传输遇到了巨大的挑战。最近，命名数据网络被认为是解决SATN场景中这个问题的一种很有前途的方法。然而，在这种方法中出现了一个新问题，即生产者和消费者移动性管理。在本文中，我们提出了一种基于位置预测的方案，以减少切换过程中的往返时间并进一步提高系统吞吐量，并使生产者和消费者能够同时从旧接入点 (AP) 移动到一个新的 AP。而且，所提出的方案可以应用于两种SATN场景。最后，通过仿真验证了所提出方案的有效性。