摘要：【中文】本发明公开了一种天地一体化空间信息网络匿名接入认证方法及系统，该方法由终端设备和卫星分别向地面管理中心进行注册，终端设备向卫星发送首次接入认证请求，卫星转发终端设备的接入认证请求以及身份认证消息，地面管理中心回复卫星首次接入认证第一响应，终端设备接收并验证卫星发送的首次接入认证第二响应,完成首次接入认证过程，终端设备向卫星发送再次接入认证请求，接收卫星的再次接入认证响应,完成再次接入认证过程，本方法可以有效地对终端设备的合法性进行判断，保护了终端设备的隐私，大大降低了接入认证的复杂度。 【EN】The invention discloses a space-ground integrated space information network anonymous access authentication method and a system, wherein terminal equipment and a satellite register with a ground management center respectively, the terminal equipment sends a first access authentication request to the satellite, the satellite forwards the access authentication request and an identity authentication message of the terminal equipment, the ground management center replies a first response of the first access authentication of the satellite, the terminal equipment receives and verifies a second response of the first access authentication sent by the satellite, the first access authentication process is completed, the terminal equipment sends a second access authentication request to the satellite, receives the second access authentication response of the satellite, and the second access authentication process is completed.

摘要：【中文】本发明涉及卫星通信领域，具体涉及一种天地一体化网络SDN控制器按需动态放置方法，包括：根据应急任务需求构建应急卫星子网，确定低轨道卫星LEO卫星子网S₀；确定卫星对地最大覆盖时间窗口和卫星对终端覆盖的时间窗口值，计算卫星节点的覆盖冗余值N；根据N确定满足冗余覆盖的卫星子网S_r；建立基于网络时延的优化模型；利用近似算法对优化模型进行求解，确定S_r控制器放置的位置。本发明以卫星对任务终端的覆盖窗口为基础设置卫星节点覆盖冗余度，可以保障任务区域的有效覆盖；此外，对网络时延进行分析建模，利用近似算法对模型进行求解，能够在满足网络覆盖需求的同时优化网络时延。 【EN】The invention relates to the field of satellite communication, in particular to a method for dynamically placing a space-ground integrated network SDN controller as required, which comprises the following steps: an emergency satellite subnet is constructed according to the emergency task requirement, and a low orbit satellite LEO satellite subnet S is determined₀(ii) a Determining a maximum satellite-to-ground coverage time window and a time window value covered by a satellite-to-terminal, and calculating a coverage redundancy value N of a satellite node; determining satellite subnet S meeting redundancy coverage according to N_r(ii) a Establishing an optimization model based on network time delay; solving the optimization model by using an approximate algorithm to determine S_rThe location where the controller is placed. According to the invention, the coverage redundancy of the satellite nodes is set on the basis of the coverage window of the satellite to the task terminal, so that the effective coverage of the task area can be ensured; in addition, the network delay is analyzed and modeled, and the model is solved by using an approximate algorithm, so that the network delay can be optimized while the network coverage requirement is met.