Internet of things service routing method

1. A method implemented by an Internet of things (IoT) platform and comprising:

receiving a service message from an application;

determining, based on a first service feature of the service message, a target network slice corresponding to the first service feature, including:

obtaining, from the application, the first service feature and a service requirement corresponding to the first service feature;

obtaining, from an underlying network, first information about a target network slice corresponding to the first service feature;

determining that no network slice that meets the service requirement exists in the underlying network; and

requesting, the underlying network to create the target network slice; and

sending, the service message to a terminal device through the target network slice.

2. The method of claim 1 , wherein the service requirement comprises a first description parameter of the service requirement, and wherein the method further comprises:

obtaining a second description parameter of the target network slice by converting or mapping the first description parameter; and

sending a message comprising the second description parameter and requesting the underlying network to create the target network slice.

3. The method of claim 1 , wherein after obtaining the first service feature and the first information, the method further comprises:

determining, based on the first service feature and the first information, a second service feature of an uplink service message from the terminal device and corresponding to the first service feature and second information about the target network slice corresponding to the second service feature; and

sending, to the terminal device, the second service feature of the uplink service message and the second information.

4. The method of claim 1 , wherein after obtaining the first service feature and the first information, the method further comprises sending the first information to the terminal device.

5. The method of claim 1 , further comprising:

receiving, from the terminal device, a registration request comprising addressing information of the terminal device in the target network slice; and

determining the addressing information; and

further sending the service message based on the addressing information.

6. The method of claim 5 , wherein receiving the registration request comprises:

receiving a first registration request from the terminal device through a first network slice that is different from the target network slice;

instructing the terminal device to access the target network slice; and

receiving a second registration request from the terminal device through the target network slice, wherein the second registration request comprises the addressing information.

7. The method of claim 5 , wherein receiving the registration request comprises:

receiving a first registration request from the terminal device through a first network slice in the target network slice;

instructing the terminal device to access the target network slice, wherein the target network slice comprises another network slice other than the first network slice; and

receiving a second registration request from the terminal device through any network slice in the target network slice,

wherein the second registration request comprises the addressing information.

8. The method of claim 6 , further comprising sending, to the terminal device, the first service feature and information about the target network slice corresponding to the first service feature to instruct the terminal device to access the target network slice and register with the IoT platform through the target network slice.

9. The method of claim 1 , wherein the first information comprises one of an identifier or a name of the target network slice, a type of the target network slice, an identifier or a name of an operator to which the target network slice belongs, or an address of a network element in the target network slice.

10. The method of claim 1 , wherein the first service feature comprises at least any one of a source application identifier or type, a destination application identifier or type, a source service middleware identifier or type, a destination service middleware identifier or type, a service resource identifier or type, a service message type, an operation method, or a message priority.

11. A method implemented by a terminal device and comprising:

registering with an internet of things (IoT) platform through a first network slice;

receiving a message from the TOT platform through the first network slice, wherein the message comprises a service feature and information about a target network slice corresponding to the service feature;

registering, with the IoT platform through the target network slice; and

sending an uplink service message to the IoT platform through the target network slice or receiving a downlink service message from the IoT platform through the target network slice,

wherein the uplink service message and the downlink service message meet the service feature.

12. The method of claim 11 , further comprising sending a registration request for registering with the IoT platform through the target network slice, wherein the registration request comprises addressing information of the terminal device in the target network slice.