CPC H04W 36/0022 (2013.01) [H04W 8/08 (2013.01); H04W 36/0011 (2013.01); H04W 36/0079 (2018.08); H04W 36/08 (2013.01); H04W 36/30 (2013.01); H04W 76/27 (2018.02); H04W 76/30 (2018.02); H04W 80/10 (2013.01)] | 17 Claims |
1. A communications method, comprising:
receiving, by a target access network device, a handover request from a source access network device, wherein the handover request comprises identifiers of sessions requested to be handed over;
performing, by the target access network device, an admission control based on the handover request;
sending, by the target access network device, a path switch request to a core network device, wherein the path switch request comprises an identifier of an accepted session that is accepted by the target access network device, an identifier of a rejected session that is rejected by the target access network device and cause information indicating a rejection reason for rejecting the rejected session, wherein the identifier of the rejected session informs the core network device the rejected session that is rejected by the target access network device, wherein the cause information comprises that the target access network device does not support a network slice corresponding to the rejected session, or a resource is not available for the network slice corresponding to the rejected session and the network slice is supported by the target access network device; and
receiving, by the target access network device, a path switch request response message from the core network device, wherein the path switch request response message comprises an identifier of a session for which path switch has been successfully completed.
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