Terminal switching method for satellite-ground convergence network
A converged network and terminal handover technology, applied in the field of terrestrial 5G cellular network and satellite communication, can solve problems such as difficulty in taking into account handover performance, method practicability, inadaptability to satellite-ground integrated network, etc.
Active Publication Date: 2021-04-23
CHONGQING UNIV OF POSTS & TELECOMM
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However, the existing inter-satellite handover strategies are often difficult to take into account the optimization of handover performance and the practicability of the method, and are not suitable for the development of the future trend of satellite-ground fusion network.
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[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.
[0020] figure 1 It is a diagram of the inter-satellite handover network architecture, which is mainly composed of ground terminals U1, U2, gateway stations and LEO satellite groups S1, S2, and S3; during the entire handover process, the ground terminal U1 located on the serving satellite S1 needs to be handed over to its neighbor satellite Under S2, the ground terminal U2 located under the serving satellite S3 needs to be switched to its neighbor satellite S2....
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The invention relates to the technical field of ground 5G cellular networks and satellite communication, and relates to a terminal switching method for a satellite-ground convergence network. The switching method comprises the following steps that: a ground terminal performs pre-bearing switching signaling judgment according to switching measurement information; after receiving the pre-bearing switching signaling, the service satellite selects an optimal target satellite from a neighbor satellite list by adopting a multi-attribute decision; the service satellite sends a switching application to a target satellite, and the target satellite allocates required resources to a ground terminal; switching is triggered when the ground terminal meets the switching judgment event, and target satellite resources are issued to the ground terminal by the service satellite; the ground terminal is connected with a target satellite through a random access process to complete inter-satellite switching; according to the pre-bearing switching method provided by the invention, the inter-satellite switching time delay can be reduced, and the switching success rate is improved; A traditional satellite target selection mode is improved, switching indexes such as signal strength and visual time can be met, and the influence of frequent switching of the ground terminal on the switching rate is also overcome.
Description
technical field [0001] The invention relates to the technical field of terrestrial 5G cellular network and satellite communication, in particular to a terminal switching method for a satellite-ground fusion network. Background technique [0002] With the continuous development of mobile communication technology, the data transmission rate of the 5th Generation mobile network (5th Generation mobile networks, 5G) far exceeds the previous cellular network, up to 10Gbit / s, providing low network delay, low in 1 millisecond. Although the technology used in the terrestrial cellular communication system is getting newer, more and more services can be provided, and the communication rate is getting faster and faster, but it is still unable to achieve seamless coverage on a global scale. In this case, the integration of satellite and terrestrial networks can be the cornerstone to realize a heterogeneous global system. Due to their inherently large coverage, satellites can effectivel...
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IPC IPC(8): H04W36/00H04W36/08H04W84/06H04B7/185
CPCH04W36/00835H04W36/08H04W84/06H04B7/18513Y02D30/70
Inventor 徐川余乐赵国锋韩珍珍孙南彬刘恩慧刘坤
Owner CHONGQING UNIV OF POSTS & TELECOMM