Seamless switching method between indoor wireless location and outdoor wireless location based on cost function
A cost function and wireless positioning technology, applied in wireless communication, electrical components, etc., can solve the problem of seamless switching between indoor wireless positioning and outdoor wireless positioning, and achieve the effect of seamless switching
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specific Embodiment approach 1
[0038] Embodiment 1: Combining image 3 Describing this embodiment, the specific steps of the seamless handover method for indoor wireless positioning and outdoor wireless positioning based on a cost function in this embodiment are:
[0039] Step 1. Set the overlap area
[0040] (1) Spatial setting of the overlapping area: The setting of the overlapping area is specifically as follows: to ensure that the user can receive the signal broadcast by the positioning system when entering the signal coverage area of the positioning system, and the typical user's movement speed The time required to pass through the overlapping area is greater than the time required to download the information required for positioning, so that the user has completely downloaded the data required for positioning when entering the target positioning system;
[0041] (2) Establishment of positioning in the overlapping area: the user should be able to obtain the location information provided by the two p...
Embodiment
[0075] combine Figure 3-Figure 4 To further illustrate the present invention, Figure 4 The schematic diagram of indoor and outdoor handover area obtained by software simulation through the handover method based on cost function is given. The indoor positioning uses a WLAN-based fingerprint positioning system, and the outdoor GPS system is used. In the experiment, an open indoor environment and its surrounding outdoor environment are simulated. Four APs (wireless access points) are evenly arranged in the room. The transmit power of each AP is -17dBm, and the signal overlap area extends 10m outside the wall. In the simulation, the classical logarithmic model is used to simulate the fading of the WLAN signal, and the floor attenuation factor model is used to simulate the attenuation of the WLAN signal after passing through the wall. image 3 Medium black squares represent room walls, and white circles represent AP locations. The dark part represents the area using indoor posi...
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