Communication method and related products

A communication method and mobile communication network technology, applied in the field of communication methods and related products, to achieve the effects of resisting the risk of key leakage, improving communication security, and reducing the risk of key leakage

Active Publication Date: 2021-11-09
HUAWEI TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

For example, if the UE accesses the NPN through the NPN non-3gpp access network, and at the same time accesses the NPN through the PLMN, then security issues need to be considered

Method used

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  • Communication method and related products
  • Communication method and related products
  • Communication method and related products

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Experimental program
Comparison scheme
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Embodiment Construction

[0042] Embodiments of the present application are described below with reference to the drawings in the embodiments of the present application.

[0043] see Figure 1-A , Figure 1-A It is a schematic diagram of a 5G network architecture as an example of the embodiment of this application. Among them, the 5G network splits certain functional network elements (such as Mobility Management Entity (MME, Mobility Management Entity), etc.) of the 4G network to a certain extent, and defines a service-based architecture. exist Figure 1-A In the shown network architecture, functions similar to MME in 4G network are split into access and mobility management function (AMF, Access and Mobility Management Function) and session management function (SMF, Session Management Function) and so on.

[0044] Some other related network elements / entities are introduced below.

[0045] A user terminal (UE, User Equipment) accesses a data network (DN, DataNetwork) etc. by accessing the operator's ne...

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Abstract

The communication method and related products of the embodiment of the present application, a communication method includes: the AMF of the first network receives a registration request for requesting to register the UE to the first network, and the registration request is when the UE accesses the first network through the second network The registration process is generated, the first network is PLMN and the second network is NPN, or the first network is NPN and the second network is PLMN; the AMF of the first network obtains the corresponding AMF through the process of UE registration to the first network After the key Kamf, the first key Kn3iwf is derived based on Kamf and the key input parameter T1; the first key Kn3iwf is different from the second key Kn3iwf, and the second key Kn3iwf is accessed by the UE through the second network through non-3GPP Generated during the process of network access to the second network. The above scheme is beneficial to improve the Kn3iwf key isolation in the cross-network access scenario, thereby improving communication security.

Description

technical field [0001] This application relates to the technical field of communication, in particular to a communication method and related products. Background technique [0002] The 3rd Generation Partnership Project (3GPP, 3rd Generation Partnership Project) proposes a group communication method in the 5G LAN research project: using a non-public network (NPN, Non-Public Network) to form a network. The public mobile communication network (PLMN, Public Land Mobile Network) is basically the same, and has its own independent access network part (including 3gpp access and non-3gpp access) and core network part. The NPN User Equipment (UE, User Equipment) also has the same key system as the PLMN UE. [0003] In order to ensure the network continuity of the UE, the UE can access the NPN through the NPN's own access network, of course, it can also access the NPN through the PLMN, and vice versa. For example, if the UE accesses the NPN through the NPN non-3gpp access network an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W60/00H04W12/04H04W12/08H04W48/16
CPCH04W12/02H04W12/06H04W48/16H04W60/00
Inventor 李飞张博
Owner HUAWEI TECH CO LTD
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