In a wireless communication system, a method includes monitoring an error condition on an active communication channel, establishing a simultaneous communication channel, and searching the simultaneous communications channel while continuing to monitor the active communication channel. A pixel of an image sensor includes: a photodiode for generating and collecting a photo generated charge; a floating diffusion region for serving as a photo generated charge sensing node; a transfer gate for controlling a charge transfer from the photodiode to the floating diffusion region by a control signal; and a potential well incorporated under the transfer gate. An MTUfragmentation size adopted in the wireless transmission channel is set and dynamically adjusted according to the current transmission status of the wireless transmission channel. The second-type connector pin is coupled to impedance matching circuits included in an load circuit.