Slice control method and apparatus
A slice control method and apparatus are provided. The method includes: a policy control network element receives, from a slice access control network element, slice access status information of a network slice, the slice access status information comprises information indicating a network slice traffic bandwidth of the network slice; determines, based on the current slice access status information of the network slice, that the network slice traffic bandwidth exceeds a corresponding maximum value allowed by configuration; generates, in response to the determination, first session policy control information for a first session in the network slice; and sends the first session policy control information to a session management network element corresponding to the first session, the first session policy control information being for policy control on the first session.
1 . A slice control method, the method comprising:
subscribing to a slice access control network element, by a policy control network element, for slice access status information of a network slice;
receiving, by the policy control network element from the slice access control network element, the slice access status information of the network slice;
determining, by the policy control network element based on the slice access status information of the network slice, that a network slice traffic bandwidth utilized by the network slice exceeds a corresponding bandwidth maximum value allowed by configuration;
generating, by the policy control network element in response to the determining, first session policy control information for a first session in the network slice; and
sending, by the policy control network element, the first session policy control information to a session management network element corresponding to the first session, the first session policy control information being for policy control on the first session.
2 . The method according to claim 1 , further comprising:
receiving, by the policy control network element from the session management network element, a first request message, wherein the first request message comprises an identifier of the network slice.
3 . The method according to claim 2 , wherein the first request message requests the first session policy control information associated with the first session.
4 . The method according to claim 2 , wherein the first request message is a session management policy association establishment request message.
5 . The method according to claim 2 , wherein the first request message further comprises an identifier of a terminal device.
6 . The method according to claim 2 , wherein the first request message further comprises an identifier of the first session.
7 . The method according to claim 1 , further comprising:
receiving, by the session management network element, the first session policy control information from the policy control network element; and
performing, by the session management network element, the policy control on the first session based on the first session policy control information.
8 . A communications apparatus, comprising:
a transceiver configured to receive, from a slice access control network element, slice access status information of a network slice;
a processor configured to:
subscribe to the slice access control network element for the slice access status information of the network slice;
determine, based on the slice access status information of the network slice, that a network slice traffic bandwidth utilized by the network slice exceeds a corresponding maximum bandwidth value allowed by configuration; and
generate, in response to the determination, first session policy control information for a first session in the network slice; and
the transceiver is further configured to send the first session policy control information to a session management network element corresponding to the first session, the first session policy control information being for policy control on the first session.
9 . The communications apparatus according to claim 8 , wherein the transceiver is further configured to receive, from the session management network element, a first request message, wherein the first request message comprises an identifier of the network slice.
10 . The communications apparatus according to claim 9 , wherein the first request message requests the first session policy control information associated with the first session.
11 . The communications apparatus according to claim 9 , wherein the first request message is a session management policy association establishment request message.
12 . The communications apparatus according to claim 9 , wherein the first request message further comprises an identifier of a terminal device.
13 . The communications apparatus according to claim 9 , wherein the first request message further comprises an identifier of the first session.
14 . A communications system, comprising:
a policy control network element configured to:
subscribe to a slice access control network element, by a policy control network element, for slice access status information of a network slice;
receive, from the slice access control network, the slice access status information of the network slice;
determine, based on the slice access status information of the network slice, that a network slice traffic bandwidth utilized by the network slice exceeds a corresponding maximum bandwidth value allowed by configuration;
generate, in response to the determination, first session policy control information for a first session in the network slice;
send the first session policy control information; and
a session management network element corresponding to the first session, the session management network element being configured to:
receive the first session policy control information from the policy control network element; and
perform policy control on the first session based on the first session policy control information.
15 . The communications system according to claim 14 , wherein the transceiver is further configured to receive, from the session management network element, a first request message, wherein the first request message comprises an identifier of the network slice.
16 . The communications system according to claim 15 , wherein the first request message is a session management policy association establishment request message.
17 . The communications system according to claim 15 , wherein the first request message further comprises an identifier of a terminal device and an identifier of the first session.