JP-7856147-B2 - Control device, control method, and program

Inventors

• 小野 孝太郎
• 徳永 和宏
• 桑原 健

Assignees

• ＮＴＴ株式会社

Dates

Publication Date

20260511

Application Date

20220620

Claims (5)

1. A control device connected via a communication network to a mobile terminal equipped with at least a GNSS receiver, A control unit is configured to determine in real time the reception status of the GNSS signal in the GNSS receiver of the mobile terminal, and if it is determined that the GNSS receiver cannot receive the GNSS signal, to change the network path used by the mobile terminal to a network path with better network quality, and to control the activation of sensor equipment including the imaging device of the mobile terminal. A control device having
2. A receiving unit configured to receive at least one of the GNSS signal received by the GNSS receiver of the mobile terminal and sensor information acquired by the sensor equipment of the mobile terminal, The system includes a positioning unit configured to determine the location information of the mobile terminal using at least one of the GNSS signal and the sensor information, The control unit, The control device according to claim 1, configured such that the positioning unit determines whether or not the position information was determined from the GNSS signal, and whether or not the GNSS receiver in the mobile terminal was able to receive the GNSS signal.
3. The control device according to claim 1 or 2 , wherein the network quality includes at least one of the bandwidth and priority of the network path used by the mobile terminal.
4. A control device connected via a communication network to a mobile terminal equipped with at least a GNSS receiver, A control procedure that determines in real time the reception status of the GNSS signal in the GNSS receiver of the mobile terminal, and if it is determined that the GNSS receiver cannot receive the GNSS signal, changes the network path used by the mobile terminal to a network path with better network quality, and controls the activation of sensor equipment including the imaging device of the mobile terminal. A control method for executing this.
5. A control device connected via a communication network to a mobile terminal equipped with at least a GNSS receiver, A control procedure that determines in real time the reception status of the GNSS signal in the GNSS receiver of the mobile terminal, and if it is determined that the GNSS receiver cannot receive the GNSS signal, changes the network path used by the mobile terminal to a network path with better network quality, and controls the activation of sensor equipment including the imaging device of the mobile terminal. A program that executes the command.

Description

This disclosure relates to a control device, a control method, and a program. In recent years, methods for acquiring location information have become more diverse and sophisticated, and there is a growing demand for location information that suits the environment and requirements. For example, in addition to positioning calculation methods using GNSS (Global Navigation Satellite System) signals, there are various positioning calculation methods that do not use GNSS signals, such as dead reckoning and image positioning. Furthermore, even among positioning calculation methods that use GNSS signals, there are not only relatively low-precision methods such as code positioning, but also advanced and high-precision methods such as RTK (Real Time Kinematic) positioning. Regarding location information positioning, an architecture has been proposed (cloud GNSS positioning architecture) in which positioning calculations are performed on the edge/cloud rather than on the mobile terminal receiving the GNSS signal (Non-Patent Document 1). In this cloud GNSS positioning architecture, the mobile terminal transmits observation data of the GNSS signal to the edge/cloud, and the position information of the mobile terminal is calculated on the edge/cloud from this observation data. On the other hand, given the diversification of methods for acquiring location information, it is expected that the architecture proposed in Non-Patent Document 1 will also perform location calculations on the edge/cloud using not only a positioning calculation method that uses GNSS signals, but also a positioning calculation method that does not use GNSS signals. Furthermore, even when performing location calculations using a positioning calculation method that uses GNSS signals, it is also expected that sensor information such as images acquired by the mobile terminal will be used as a supplementary or additional tool for more accurate positioning. Makoto Yoshida, Takato Kirihara, Shunichi Tsuboi, Tsuyoshi Toyono, Ken Kuwahara, "High-Value Location Information Service through GNSS and Network Integration", NTT Technical Journal, 2019.4 This figure shows an example of the overall configuration of the communication control system according to this embodiment.This figure shows an example of the functional configuration of a mobile terminal according to this embodiment.This figure shows an example of the functional configuration of the control server according to this embodiment.This flowchart shows an example of location information data storage processing according to this embodiment.This is a flowchart (part 1) showing an example of the network control process according to this embodiment.This is a flowchart (part 2) showing an example of the network control process according to this embodiment. The following describes one embodiment of the present invention. In the following description, we primarily assume communication resources such as communication bandwidth, and describe a communication control system 1 that optimizes the use of communication resources associated with acquiring location information. However, this is merely an example, and the resources associated with acquiring location information are not limited to communication resources. For example, the embodiments described below can also be applied to edge/cloud server resources in a cloud GNSS architecture (e.g., various hardware resources such as CPU (Central Processing Unit) resources, GPU (Graphics Processing Unit) resources, and memory resources). In the following, positioning calculations using GNSS signals will be referred to as GNSS positioning. Examples of GNSS positioning include code positioning and RTK positioning. Code positioning is classified as single positioning, while RTK positioning is classified as relative positioning. Relative positioning determines position information from the relative positional relationship between two points, and therefore requires the existence of a reference station whose position information is known. On the other hand, positioning calculations that do not use GNSS signals will be referred to as non-GNSS positioning. Examples of non-GNSS positioning include dead reckoning and image positioning. In addition to these, auxiliary or additional processing to improve the accuracy of GNSS positioning (e.g., matching with high-resolution maps, estimation of position information using 3D or 4D spatial information) will also be referred to as non-GNSS positioning. <Example of overall configuration of communication control system 1> Figure 1 shows an example of the overall configuration of the communication control system 1 according to this embodiment. As shown in Figure 1, the communication control system 1 according to this embodiment includes a plurality of mobile terminals 10, a control server 20, a location information database 30, and an NW information database 40. Each mobile terminal 10 and the control server 20 are connected to each other