Multi-user handover method based on evolutionary game in software-defined satellite network system
A satellite network, software-defined technology, applied in network topology, electrical components, wireless communication, etc., can solve the problems of not well reflecting satellite load conditions, characterization of unuser resource competition process, user handover failure, etc., to reduce handovers. The effect of failure rate, error reduction, and network load balancing
Active Publication Date: 2022-04-05
CHONGQING UNIV OF POSTS & TELECOMM
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Problems solved by technology
However, there are disadvantages in using the number of idle channels of the satellite to reflect the load status of the satellite: in the actual communication process, all users in the satellite coverage area will receive the information of the number of idle channels of the satellite at the same time, and all users in the area will display Selecting the satellite with the lightest load for access based on the principle of the greatest self-interest may lead to the problem of overloading the satellite
Therefore, the number of satellite idle channels cannot reflect the load status of satellites well, and other indicators are needed to judge the load status of satellites
In addition, the traditional satellite handover strategy is based on signal strength, so users may fail to handover; and the traditional satellite handover strategy does not describe the dynamic resource competition process between users
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[0023] 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.
[0024] The present invention provides a multi-user switching method based on evolutionary game in a software-defined satellite network system, such as figure 1 As shown, the method includes:
[0025] S1. All users calculate the elevation angle information and remaining coverage time of satellites respectively according to the acquired information;
[0026] In one embodiment, considering that there is a nonlinear relationship between the satellite elevation an...
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The invention belongs to the technical field of mobile communication, and relates to a multi-user switching method based on evolutionary game in a software-defined satellite network system; The three basic factors of capacity, elevation angle and remaining coverage time calculate the income; the controller calculates the average income of the users in the area, and broadcasts to the users; judges whether the income of all users is higher than the average income, and if it is higher, it ends Multi-user switching; otherwise, the user chooses other switching satellites with higher income; the user constantly repeats this dynamic strategy adjustment process until reaching an equilibrium state; the present invention models the multi-user switching problem as an evolutionary game problem, and takes the evolutionary equilibrium as the equilibrium of the game Solution, find the optimal policy ratio, and ensure that all users can get the best service after switching, thus ensuring the fairness of users.
Description
technical field [0001] The invention belongs to the technical field of mobile communication, and relates to a multi-user switching method based on evolutionary game in a software-defined satellite network system. Background technique [0002] Due to limited coverage, terrestrial cellular networks cannot provide mobile services in remote mountainous areas, oceans, plateaus and other areas. Satellite communication forms a satellite constellation through joint networking of multiple satellites. It has the characteristics of wide coverage and is not restricted by regions and airspaces, which has attracted people's attention. The integration of satellite communication network and ground mobile communication network will become an important development direction of mobile communication. Among them, the low-orbit satellite system has attracted widespread attention due to its characteristics of low delay, small path loss, and wide coverage. The coverage time of the network is limi...
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IPC IPC(8): H04W36/08H04W84/06
CPCH04W36/08H04W84/06H04W48/12H04W36/324H04W36/322
Inventor 李云刘梦梦吴广富
Owner CHONGQING UNIV OF POSTS & TELECOMM