CN104639429A - Message notification method and device of cloud platform - Google Patents
Message notification method and device of cloud platform Download PDFInfo
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Abstract
The invention provides a message notification method and device of a cloud platform. The message notification method comprises the following steps: when creating or deleting the equipment resource by the cloud platform, transmitting a change resource notification triggered by creating or deleting the equipment resource in combination. The message notification device comprises a first combined transmission module. Under an extreme case, the message notification method and the device of the cloud platform disclosed by the invention can avoid the problem of subscription failure of an application domain server. After the equipment resource is created, when the equipment resource is updated, the generated subscription notification thereby is transmitted in combination, so that the quantity of the transmitted subscription notification can be reduced, the load of the cloud platform can be lightened and the processing capacity of the cloud platform server can be improved.
Description
Technical Field
The invention relates to the technical field of Internet of things, in particular to a message notification method and device for a cloud platform.
Background
For the procedure of subscribing a subscriber to a cloud platform server (abbreviated as cloud platform) for message notification in the internet of things, European Telecommunications Standards Institute (ETSI), the published subscription rule is: when the resources of the device served by the cloud platform are created or modified, the device is notified to a subscriber, and the subscriber is the application domain server. The subscription associates the subscriber with the cloud platform of the subscribed resource. The subscription should be represented by the resource itself. This allows subscriptions to operate in a resource-oriented manner. For example, the conditions of the subscription may be modified, and the subscriber may cancel the subscription by deleting the subscribed resource.
After the device is online, when the cloud platform creates a related resource based on the online of the device, a time difference exists between creation of a device instance of a scl (service capability layer) and creation of a related node resource of the scl, specifically, the cloud platform creates each node resource related to the scl after creating the scl first, triggers sending a scl creation notification to the subscriber once the scl is successfully created, and triggers sending a corresponding node resource creation notification to the subscriber once a certain node resource is successfully created.
In an extreme case, the application domain server receives the notification that scl is being created, and performs the node resource subscription operation based on the requirement of the subscriber, and the node resource subscription operation fails if the node resource is not created. Or, the cloud platform may also cause the node resource subscription operation to fail because the cloud platform is in a full load state at the time.
In addition, one online event of the device is converted into ten times of HTTP (HyperText Transfer Protocol) subscription notifications sent by the cloud platform to the subscriber, where the ten times of HTTP subscription notifications respectively carry multiple node resource values of the device, version numbers of programs and hardware on the device, and control commands that can be supported by the device subscription, and sending of a large number of subscription notifications reduces effective processing capacity of the cloud platform.
Disclosure of Invention
The technical problem to be solved by the present invention is to provide a method and an apparatus for notifying a message on a cloud platform, so as to avoid the situation that the node resource subscription execution operation fails under the above extreme conditions, and reduce the burden on the cloud platform.
The technical scheme adopted by the invention is that the message notification method of the cloud platform comprises the following steps:
and when the cloud platform creates or deletes the equipment resources, combining and sending the resource change notification triggered by the creation or deletion of the equipment resources.
Further, the merging and sending the notification of changing the resource triggered by creating or deleting the device resource includes:
aiming at any equipment, merging and sending all resource change notifications triggered by the creation or deletion of equipment resources of the equipment;
the device resource includes: device instances and their associated node resources.
Further, the method further comprises: when the cloud platform updates the device resources, the subscription notification triggered by the updating of the device resources is merged and sent.
Further, the merged sending of the subscription notification triggered by the updating of the device resource includes:
the method comprises the following steps that a cloud platform reads batch subscription configuration information in advance, wherein the batch subscription configuration information comprises: combining mode and sending time;
and when a sending opportunity comes, the cloud platform merges and sends the subscription notification triggered by updating the equipment resources according to the merging mode.
Further, the merging method includes:
for any equipment, filtering subscription notifications triggered by updating the equipment resources according to the set node resource type of the equipment resources, and merging the subscription notifications of the node resource type obtained after filtering;
the sending opportunity at least comprises one of the following:
1) set periodic transmission time;
2) when the number of subscription notifications triggered by updating the device resource reaches a set upper limit;
3) the first arrival is the criterion in 1) and 2).
Further, the set node resource type of the device resource at least includes one of: filling node resources of state class parameters, filling node resources of alarm class parameters and filling node resources of version class parameters;
a 2) th category of the transmission opportunities, comprising:
the number of the subscription notifications triggered by updating the device resource reaches the set number; or,
the storage space occupied by the subscription notification triggered by updating the device resource reaches a set value.
The invention also provides a message notification device of the cloud platform, which is arranged in the cloud platform and comprises:
the first merging and sending module is used for merging and sending the resource change notification triggered by the creation or deletion of the device resource when the device resource is created or deleted by the cloud platform.
Further, the first combining and sending module is configured to:
aiming at any equipment, merging and sending all resource change notifications triggered by the creation or deletion of equipment resources of the equipment;
the device resource includes: device instances and their associated node resources.
Further, the apparatus further includes:
and the second merging and sending module is used for merging and sending the subscription notification triggered by the updating of the equipment resource when the equipment resource is updated by the cloud platform.
Further, the second combining and sending module is configured to:
reading batch subscription configuration information in advance, wherein the batch subscription configuration information comprises: combining mode and sending time;
and when the sending opportunity comes, combining and sending the subscription notification triggered by updating the equipment resources according to the combination mode.
By adopting the technical scheme, the invention at least has the following advantages:
the message notification method and the message notification device for the cloud platform avoid the problem of subscription failure of the application domain server under an extreme condition. After the device resources are created, the generated subscription notifications are also merged and sent when the device resources are updated, so that the number of the subscription notifications sent can be reduced, the burden of the cloud platform is reduced, and the processing capacity of the cloud platform server is improved.
Drawings
Fig. 1 is a flowchart of a message notification method for a cloud platform when a device is online according to a first embodiment of the present invention;
fig. 2 is a flowchart of a message notification method for a cloud platform when a device is offline according to a first embodiment of the present invention;
fig. 3 is a flowchart of a message notification method of a cloud platform according to a second embodiment of the present invention;
fig. 4 is a schematic structural diagram of a message notification apparatus of a cloud platform according to a third embodiment of the present invention;
fig. 5 is a schematic structural diagram of a message notification apparatus of a cloud platform according to a fourth embodiment of the present invention;
fig. 6 is a schematic diagram illustrating a process of merging subscription notifications by a cloud platform when a device reports a device state event according to a fifth embodiment of the present invention.
Detailed Description
To further explain the technical means and effects of the present invention adopted to achieve the intended purpose, the present invention will be described in detail with reference to the accompanying drawings and preferred embodiments.
A first embodiment of the present invention provides a message notification method for a cloud platform, as shown in fig. 1, including the following specific steps:
step S101, when the device is online, sending a device online event to a cloud platform, and the cloud platform creating device resources for the device based on the device online event.
Specifically, the device resource created on the cloud platform conforms to a Key value structure set by the ETSI for managing the resource in the cloud platform, for example, the following structure is used:
/<m2m>/scls/<scl1>/containers/<container1>/
in the Key value structure, m2m is an identifier of a cloud platform, scls is a set of device instances, scl1 is a device instance under scls, contacts is a set of container node resources under device instance scl1, contacts 1 is a specific resource node, and a set of attribute parameters of the same type is filled in contacts 1, for example: when the name of container1 is set to STATUS _1, it represents a parameter set of the STATUS class; when the name of container1 is set as ALERT _1, the name represents the parameter set of the alarm class; the name container1, when set to VERSION _1, represents a collection of parameters for a VERSION class. In the Key value structure, only m2m, scl1, and container1 are variables, and the rest are constants.
The device resource of the embodiment of the invention comprises: device instances and their associated node resources. The device instance scl1 may be populated as a Media Access Control (MAC) address of the device.
Step S102, when the cloud platform creates the equipment resource, the resource change notification triggered by the creation of the equipment resource is merged and sent.
Specifically, in step S102, the merging and sending the notification of the changed resource triggered by the creation of the device resource includes:
and aiming at any equipment, merging and transmitting all the changed resource notifications triggered by the equipment resources for creating the equipment.
In the prior art, a resource creation notification message is sent to an application domain server by a cloud platform when a device instance node scl1 is successfully created, and then node resources under scl1 are created after scl1 is successfully created, which may cause failure of node resource subscription of the application domain server to the cloud platform under extreme conditions.
Accordingly, as shown in fig. 2, the above message merging concept can also be used when the cloud platform receives an offline event of the device, as follows:
step S201, when the device is off line, sending a device off line event to the cloud platform, and the cloud platform deletes the device resource created before for the device based on the device off line event.
Step S202, when the cloud platform deletes the equipment resource, the resource change notification triggered by the deletion of the equipment resource is merged and sent.
Specifically, in step S202, the merging and transmitting the notification of resource change triggered by the deletion of the device resource includes:
and aiming at any equipment sending the equipment offline event, merging and sending all the changed resource notifications triggered by deleting the equipment resources of the equipment.
A second embodiment of the present invention is a method for notifying a message of a cloud platform, and the method in this embodiment is substantially the same as the method in the first embodiment, except that as shown in fig. 3, the method in this embodiment further includes the following specific steps:
step S301, when the cloud platform receives the device state event, the device failure event, or the device firmware update event, the device resource is updated.
Specifically, when the cloud platform updates the device resources managed by the cloud platform, the update is performed according to various types of service events reported by the device to the cloud platform, and the types of the service events include: device status events, device failure events, and device firmware update events. The device state event, the device failure event, the device firmware update event in the type of the service event correspond to the three types of the node resource of the device resource one by one. For example, when the cloud platform receives a device state event sent by a device, the cloud platform updates parameter values in the node resources filling the state class parameters. The types of the service events actually include an online event and a offline event of the device, and the operations corresponding to the cloud platform are to create and delete a device resource, which has been described in the first embodiment.
Step S302, when the cloud platform updates the device resource, the cloud platform merges and sends a subscription notification triggered by the updating of the device resource.
Specifically, in step S302, the merging and sending the subscription notification triggered by updating the device resource includes:
a1: the method comprises the following steps that a cloud platform reads batch subscription configuration information in advance, wherein the batch subscription configuration information comprises: combining mode and sending time;
a2: and when a sending opportunity comes, the cloud platform merges and sends the subscription notification triggered by updating the equipment resources according to the merging mode. If the subscription notification carries the parameter values in the node resources, the updated latest numerical values of the device resources are sent by the cloud platform, and of course, the subscription notification may not carry the specific parameter values in the node resources, but only informs that the parameters have changed.
Further, the merging method includes:
and aiming at any equipment, filtering the subscription notification triggered by updating the equipment resource according to the set node resource type of the equipment resource, and combining the filtered subscription notifications of the node resource type.
The set node resource type of the device resource at least includes one of the following: filling node resources of state class parameters, filling node resources of alarm class parameters and filling node resources of version class parameters. And if the types of the equipment attribute parameters carried in the subscription notifications are different, taking a union set of the parameters related in the types to send for any determined node resource type during the merged sending. If the combination mode provides for combining the subscription notifications of more than two different node resource types, then for any determined node resource type, the union set of the parameters involved in the type is taken for sending, and the subscription notifications of each node resource type after combination are sent respectively.
The sending opportunity at least comprises one of the following:
1) set periodic transmission time;
2) when the number of subscription notifications triggered by updating the device resource reaches a set upper limit;
3) the first arrival is the criterion in 1) and 2).
A 2) th category of the transmission opportunities, comprising:
the number of the subscription notifications triggered by updating the device resource reaches the set number; or,
the storage space occupied by the subscription notification triggered by updating the device resource reaches a set value.
A third embodiment of the present invention is a message notification apparatus for a cloud platform, which is arranged in a cloud platform, and corresponds to the first embodiment, and as shown in fig. 4, the apparatus includes the following components:
the first merge sending module 100 is configured to, when a device resource is created or deleted on the cloud platform, merge and send a resource change notification triggered by the creation or deletion of the device resource.
Specifically, the first combining and sending module 100 is configured to:
aiming at any equipment, merging and sending all resource change notifications triggered by the creation or deletion of equipment resources of the equipment;
the device resource includes: device instances and their associated node resources. Wherein the device instance may be populated as the MAC address of the device. The node resources associated with the device instances are used to store various attribute parameters of the devices.
A fourth embodiment of the present invention is a message notification apparatus for a cloud platform, which corresponds to the second embodiment, and the method in this embodiment is substantially the same as the third embodiment, except that as shown in fig. 5, the apparatus in this embodiment further includes the following components:
a second merge sending module 200, configured to, when the cloud platform updates the device resource, merge and send a subscription notification triggered by the update of the device resource.
Specifically, the second combining and sending module 200 is configured to:
reading batch subscription configuration information in advance, wherein the batch subscription configuration information comprises: combining mode and sending time;
and when the sending opportunity comes, combining and sending the subscription notification triggered by updating the equipment resources according to the combination mode.
A fifth embodiment of the present invention is, on the basis of the foregoing embodiments, described in conjunction with fig. 6, an application example of the present invention, which takes as an example the merging of subscription notifications performed by a cloud platform when a device reports a device state event.
As shown in fig. 6, the process of merging subscription notifications by the cloud platform of this embodiment is as follows:
step 1, loading batch subscription configuration information when a cloud platform is started.
And 2, reporting the equipment online event to the cloud platform when the equipment is online.
Step 3, the cloud platform creates the device resource for the device, intercepts and combines the created resource notifications corresponding to the created device resources, and sends the created resource notification, i.e. the changed resource notification of the previous embodiment, to the application domain server until all the device resources of the device are successfully created.
And 4, reporting the equipment state event by the equipment.
And 5, the cloud platform verifies the subscription notifications triggered by the equipment resource update through the loaded batch subscription configuration information, specifically, the subscription notifications meeting the merging rules in the configuration information are merged and cached.
And 6, when the sending opportunity in the configuration information comes, sending the combined subscription notification to the application domain server.
The message notification method and the message notification device of the cloud platform in the embodiment of the invention are all modified on the basis of subscription rules published by ETSI, and in an extreme case, the problem of subscription failure of an application domain server is avoided. After the device resources are created, the generated subscription notifications are also merged and sent when the device resources are updated, so that the number of the subscription notifications sent can be reduced, the burden of the cloud platform is reduced, and the processing capacity of the cloud platform server is improved.
While the invention has been described in connection with specific embodiments thereof, it is to be understood that it is intended by the appended drawings and description that the invention may be embodied in other specific forms without departing from the spirit or scope of the invention.
Claims (10)
1. A message notification method of a cloud platform is characterized by comprising the following steps:
and when the cloud platform creates or deletes the equipment resources, combining and sending the resource change notification triggered by the creation or deletion of the equipment resources.
2. The message notification method of the cloud platform according to claim 1, wherein the merging and sending the notification of the changed resource triggered by the creation or deletion of the device resource includes:
aiming at any equipment, merging and sending all resource change notifications triggered by the creation or deletion of equipment resources of the equipment;
the device resource includes: device instances and their associated node resources.
3. The message notification method of the cloud platform according to claim 1 or 2, wherein the method further comprises: when the cloud platform updates the device resources, the subscription notification triggered by the updating of the device resources is merged and sent.
4. The message notification method of the cloud platform according to claim 3, wherein the merged sending of the subscription notification triggered by the updating of the device resource includes:
the method comprises the following steps that a cloud platform reads batch subscription configuration information in advance, wherein the batch subscription configuration information comprises: combining mode and sending time;
and when a sending opportunity comes, the cloud platform merges and sends the subscription notification triggered by updating the equipment resources according to the merging mode.
5. The message notification method of the cloud platform according to claim 4, wherein the merging manner includes:
for any equipment, filtering subscription notifications triggered by updating the equipment resources according to the set node resource type of the equipment resources, and merging the subscription notifications of the node resource type obtained after filtering;
the sending opportunity at least comprises one of the following:
1) set periodic transmission time;
2) when the number of subscription notifications triggered by updating the device resource reaches a set upper limit;
3) the first arrival is the criterion in 1) and 2).
6. The message notification method of the cloud platform according to claim 5, wherein the set node resource type of the device resource includes at least one of: filling node resources of state class parameters, filling node resources of alarm class parameters and filling node resources of version class parameters;
a 2) th category of the transmission opportunities, comprising:
the number of the subscription notifications triggered by updating the device resource reaches the set number; or,
the storage space occupied by the subscription notification triggered by updating the device resource reaches a set value.
7. A message notification apparatus of a cloud platform, provided in the cloud platform, the apparatus comprising:
the first merging and sending module is used for merging and sending the resource change notification triggered by the creation or deletion of the device resource when the device resource is created or deleted by the cloud platform.
8. The message notification apparatus of the cloud platform according to claim 7, wherein the first merge sending module is configured to:
aiming at any equipment, merging and sending all resource change notifications triggered by the creation or deletion of equipment resources of the equipment;
the device resource includes: device instances and their associated node resources.
9. The message notification apparatus of the cloud platform according to claim 7 or 8, wherein the apparatus further comprises:
and the second merging and sending module is used for merging and sending the subscription notification triggered by the updating of the equipment resource when the equipment resource is updated by the cloud platform.
10. The message notification apparatus of the cloud platform according to claim 9, wherein the second merge sending module is configured to:
reading batch subscription configuration information in advance, wherein the batch subscription configuration information comprises: combining mode and sending time;
and when the sending opportunity comes, combining and sending the subscription notification triggered by updating the equipment resources according to the combination mode.
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