DATA COLLECTION SYSTEM
An object of the present disclosure is to enable a plurality of sensor terminals to cooperate when an event occurs. The present disclosure is a data collection system that collects sensing data detected by a sub-sensor terminal and a main sensor terminal having different sensing targets in the management node, in which the sub-sensor terminal transmits an event occurrence notification using an extension area of a layer 2 communication protocol when sensing a sensing target of the own apparatus, the management node transmits an instruction according to the event occurrence notification to the main sensor terminal when receiving the event occurrence notification from the sub-sensor terminal, and the main sensor terminal executes an operation defined by the instruction in response to reception of the instruction from the management node.
1 . A management node included in a data collection system that collects sensing data detected by a sub-sensor terminal and a main sensor terminal having different sensing targets in the management node,
wherein the management node is further configured to:
when receiving an event occurrence notification indicating that a sensing target is sensed by the sub-sensor terminal using an extension area of a layer 2 communication protocol, gives an instruction according to the event occurrence notification to the main sensor terminal.
2 . The management node according to claim 1 , wherein an operation defined by the instruction is start of sensing by the main sensor terminal.
3 . The management node according to claim 1 , wherein
the main sensor terminal is a camera terminal that captures an image of the sensing target, and
an operation defined by the instruction is attachment of a marker to captured video data.
4 . A data collection system comprising:
a sub-sensor terminal that transmits an event occurrence notification using an extension area of a layer 2 communication protocol when sensing a sensing target of an own apparatus;
a management node that receives the event occurrence notification from the sub-sensor terminal; and
a main sensor terminal that executes an operation defined by an instruction from the management node.
5 . The data collection system according to claim 4 , wherein the main sensor terminal is activated from a sleep state when receiving an instruction from the management node.
6 . The data collection system according to claim 4 , wherein the sub-sensor terminal senses that an object including a person or a thing approaches a vicinity of the own apparatus.
7 . A method executed by a management node included in a data collection system that collects sensing data detected by a sub-sensor terminal and a main sensor terminal having different sensing targets in the management node,
wherein the management node if further configured to:
when receiving an event occurrence notification indicating that a sensing target is sensed by the sub-sensor terminal using an extension area of a layer 2 communication protocol, gives an instruction according to the event occurrence notification to the main sensor terminal.
8 . The method executed by the management node according to claim 7 , wherein an operation defined by the instruction is start of sensing by the main sensor terminal.
9 . The method executed by the management node according to claim 7 , wherein
the main sensor terminal is a camera terminal that captures an image of the sensing target, and
an operation defined by the instruction is attachment of a marker to captured video data.
10 . The management node according to claim 1 , wherein the sensing data detected by the sensor device is stored in a region different from a region storing meta data in a frame.
11 . The management node according to claim 10 , wherein the sensing data is processed before storing into the frame by converting into a shortened code or into a plurality of multiple frames.
12 . The management node according to claim 10 , wherein the sensing data is stored at an arbitrarily timing.
13 . The management node according to claim 12 , wherein the sensing data is stored at a certain period of time after being accumulated.
14 . The management node according to claim 1 , wherein a frame transmission period is dynamically changed based on a decision made by the sub-sensor terminal and the main sensor terminal or based on an instruction from the management node.
15 . The management node according to claim 1 , wherein the management node is characterized by having a function of storing combinations of two or more pieces of collected information in an information storage.
16 . The method executed by the management node according to claim 7 , wherein the sensing data is stored in a region different from a region storing meta data in a frame.
17 . The method executed by the management node according to claim 16 , wherein the sensing data is processed before storing into the frame by converting into a shortened code or into a plurality of multiple frames.
18 . The method executed by the management node according to claim 16 , wherein the sensing data is stored at an arbitrarily timing.
19 . The management node according to claim 16 , wherein the sensing data is stored at a certain period of time after being accumulated.
20 . The management node according to claim 7 , wherein a frame transmission period is dynamically changed based on a decision made by the sub-sensor terminal and the main sensor terminal or based on an instruction from the management node.