Abstract: A base station determination method includes: acquiring differential positioning information of at least one base station; according to a received satellite positioning signal and at least one group of differential positioning information, respectively calculating a calculation position of a roadside device corresponding to the at least one group of differential positioning information; and determining a target base station from the at least one base station according to the calculation position of the roadside device and the actual position of the roadside device. The target base station is a base station that corresponds to differential positioning information corresponding to a calculation position, the distance between which and the actual position is the least.

Abstract: An information sending method includes: obtaining first information for positioning a terminal device, the first information comprising differential positioning information, or the first information comprising at least one of environmental information or a satellite positioning signal, and differential positioning information; and when the first information satisfies a preset condition, sending the differential positioning information to the terminal device. The method can effectively reduce the sending of unnecessary differential positioning information, thereby avoiding unnecessary energy consumption waste of a roadside device and the terminal device, saving the time of the terminal device to calculate position information, and improving the high-precision positioning efficiency of the system.

Abstract: The present invention provides an alarm information transmission method, a sensor node device and a gateway node device so as to solve the problem in the prior art that alarm information generated by a sensor node cannot be transmitted in time. The method comprises: receiving, by a gateway node, indication information indicating that alarm information is desired to be sent from a sensor node that is ready to send the alarm information; determining corresponding emergency communication resource information from predetermined indication information and emergency communication resource information for transmitting the alarm information in accordance with the indication information; and broadcasting, by the gateway node, the determined emergency communication resource information and instructing the sensor node that receives the emergency communication resource information to transmit the alarm information in accordance with the emergency communication resource information.

Abstract: A method, device and system for determining position information are used to avoid the defects which result from the way of determining the position information of a wireless sensor node in the prior art. The method for determining the position information provided by the present invention is applied to a wireless sensor network, and includes the following steps: the current position information of a communication network node in the network is acquired; the acquired position information is determined to be the current position information of a wireless sensor node which provides service data to the communication network node.