Method and system for determining radio frequency transmitting power by acquiring geographic information

Abstract

The invention discloses a method and a system for determining radio frequency transmitting power by acquiring geographic information. The method comprises the following steps of: reading a geographic information packet of a global positioning system (GPS) module and storing geographic information in a specified buffer area; searching a format data section from the geographic information packet, reading longitude, latitude, attitude and universal time coordinated (UTC) time and storing the longitude, the latitude, the attitude and the UTC time in a structure; judging whether the geographic information packet is needed to be spliced or not; if the geographic information packet is needed to be spliced, splicing the geographic information packet with data in the current buffer area; if the geographic information packet is not needed to be spliced, not performing operation; and acquiring spliced data in the GPS module and extracting the geographic information. By the method and the system, positioning and time service can be used by a satellite mobile terminal at an (L / S) wave band directly through a unified module, and an approximate distance from a terminal to a satellite can be calculated by using the acquired geographic information so as to determine the transmitting power used by the terminal.

Description

technical field [0001] The present invention relates to the field of communication technology, and more specifically, relates to a method and system for determining radio frequency transmission power through acquisition of geographic information. Background technique [0002] At present, when using the voice, short message and digital broadcasting functions of (L, S) band satellite mobile communication system terminals, it is necessary to use a dedicated signaling system to interact with the ground station, and the ground station is required to carry in the request signaling The geographic location of the current terminal, so that the ground station can do corresponding processing. Therefore, the terminal needs to obtain relevant geographical information from the GPS module, such as longitude, latitude and altitude. And because the data packet obtained from the GPS module already contains geographical information such as longitude, latitude and altitude, and also has UTC ti...

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Problems solved by technology

[0004] In view of this, the present invention provides a method and system for determining radio frequency transmission power through the acquisition of geographical information, to overcome the problem in the prior art that the terminal cannot be well compatible with (L, S) band satellites. Positioning and timing are independent modules that cannot be directly used by satellite mobile terminals in the (L, S) bands, and cannot use the collected geographic information to calculate the approximate distance from the terminal to the satellite to determine the terminal that the terminal should use. transmit power problem

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