Communication method and related product
AssigneeHuawei Technologies Co., Ltd.
InventorsJuan Deng, Chengdong He
Life of this patent
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Abstract
A communication method and a related product are provided. The communication method includes: When UE switches from a source slice to a target slice mutually exclusive with the source slice, both the UE and a target AMF serving the target slice can obtain a first AMF key Kamf_new. The first AMF key Kamf_new is different from a second AMF key Kamf, and the second AMF key Kamf is a key of a source AMF serving the source slice. According to the application communication security and effectiveness are significantly improved_in a mutually exclusive slice switching scenario.
Claims18
A communication method applied to a target access and mobility management function (AMF), the method comprising:
- in response to user equipment (UE) switching from a source slice to a target slice mutually exclusive with the source slice, receiving, by the target AMF serving the target slice, a registration request message from the UE,
- wherein the registration request message carries network slice selection assistance information (NSSAI) of the target slice requested by the UE;
- sending, by the target AMF, a key update service request to an authentication server function (AUSF),
- wherein the key update service request carries a key input parameter T1 and/or a key input parameter T2;
- receiving, by the target AMF, a response to the key update service sent to the AUSF;
- and
- obtaining, by the target AMF, a first, AMF key, Kamf_new that is different from a second AMF key, Kamf_old,
- wherein the Kamf_new is generated based on the key input parameter T1 and/or the key input parameter T2 and the response, and
- wherein the Kamf_new is a key of the target AMF, and the Kamf_old is a key of a source AMF serving the source slice.
A communication method applied to a target access and mobility management function (AMF), the method comprising:
- in response to user equipment (UE) switching from a source slice to a target slice mutually exclusive with the source slice, receiving, by the target AMF serving the target slice, a registration request message from the UE,
- wherein the registration request message carries network slice selection assistance information (NSSAI) of the target slice requested by the UE;
- sending, by the target AMF, a key update service request to a security anchor function (SEAF);
- wherein the key update service request carries a key input parameter T1 and/or a key input parameter T2;
- receiving, by the target AMF, a response from the SEAF to the key update service request,
- wherein the response carries a first AMF key, Kamf_new that is different from a second AMF key, Kamf_old,
- wherein the Kamf_new is generated based on the key input parameter T1 and/or the key input parameter T2 and the response, and
- wherein the Kamf_new is a key of the target AMF, and the Kamf_old is a key of a source AMF serving the source slice;
- and
- obtaining, by the target AMF, the Kamf_new.
A communication method applied to a target access and mobility management function (AMF), the method comprising:
- in response to user equipment (UE) switching from a source slice to a target slice mutually exclusive with the source slice, receiving, by the target AMF serving the target slice, a registration request message from the UE,
- wherein the registration request message carries network slice selection assistance information (NSSAI) of the target slice requested by the UE;
- sending, by the target AMF, to a slice authentication and authorization server (AAA-S), a message carrying a key parameter indication,
- wherein the key parameter indication indicates to the AAA-S to generate a key input parameter T5;
- receiving, by the target AMF, the key generation parameter T5 sent by the AAA-S,
- wherein the key input parameter T5 is used to obtain a first AMF key, Kamf_new that is different from a second AMF key, Kamf_old, and
- wherein the Kamf_new is a key of the target AMF, and the Kamf_old is a key of a source AMF serving the source slice;
- and
- obtaining, by the target AMF, the Kamf_new.
Dependencies are inferred from the claim text.