Beam switching method and beam switching device
A beam switching and beam technology, applied in the field of satellite communications, can solve problems such as increasing the dwell time of communication terminals, and achieve the effects of increasing beam dwell time and reducing the number of handovers
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Embodiment 1
[0035] Embodiment 1 of the present invention provides a beam switching method, see figure 1 The shown beam switching method flow chart, the method includes the following steps:
[0036] The beam switching method designed in the embodiment of the present invention mainly considers the relative motion relationship between satellites and communication terminals, and can be applied to non-stationary orbit satellite systems using fixed multi-beam antennas, and fixed multi-beam geostationary systems that provide services for high-speed moving communication terminals satellite communication system. This strategy has no special requirements on the shape and beam arrangement of satellite beams, and is applicable to various beam arrangements.
[0037] Step S102, when the communication terminal is located within the coverage of multiple beams, respectively determine the first relative positional relationship between the multiple beams and the satellite, and the second relative positiona...
Embodiment 2
[0076] Embodiment 2 of the present invention provides a beam switching method, see Figure 5 The shown schematic diagram of an example of earth station beam switching, the specific implementation steps of the method are as follows:
[0077] The constellation orbit parameters of the non-geostationary orbit satellite communication system are: a total of 8 satellites, the semi-major axis is 26561.78km, the orbital period is 1 / 2 sidereal day, the inclination is 53.13°, the eccentricity is 0, and the right ascension interval of the ascending node is 45°, and the mean anomaly angle difference is 90°; 642 earth stations are evenly distributed in the world by equal-area division method, the minimum working elevation angle of the earth station is 10°, and each earth station always chooses the one with the best elevation angle One beam access in the satellite, each satellite has 121 circular fixed spot beams.
[0078] Select the time of one orbital cycle as the simulation total duratio...
Embodiment 3
[0092] Embodiment 3 of the present invention provides a beam switching device, see Figure 6 The schematic block diagram of the structure of the beam switching device shown, the device includes the following modules:
[0093]The positional relationship module 61 is used to determine the first relative positional relationship between the multiple beams and the satellite and the second relative positional relationship between the communication terminal and the satellite when the communication terminal is located within the coverage of multiple beams; the relative positional relationship vector module 62, for calculating the relative positional relationship vectors between the communication terminal and a plurality of beams respectively according to the first relative positional relationship and the second relative positional relationship; the tangential velocity vector module 63, for determining the tangential position of the communication terminal relative to the satellite The ...
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