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Communication method and related product

A communication method and technology for describing information, applied in the field of communication, to achieve the effect of reducing the risk of key leakage, resisting the risk of key leakage, and improving communication security

Active Publication Date: 2020-07-24
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 product

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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 embodiment of the invention discloses a communication method and a related product. The communication method comprises the following steps: receiving, by the AMF of a first network, a registrationrequest for requesting registration of UE to the first network, the registration request being generated in a registration process in which the UE accesses the first network through a second network,the first network being a PLMN and the second network being an NPN, or the first network being an NPN and the second network being a PLMN; and after the AMF of the first network obtains a corresponding AMF key Kamf through a process of registering the UE to the first network, deducing a first key Kn3iwf based on the Kamf and the key input parameter T1, wherein the first secret key Kn3iwf is different from the second secret key Kn3iwf, and the second secret key Kn3iwf is generated in the process that the UE accesses the second network through the non-3GPP access network of the second network.According to the scheme, the Kn3iwf key isolation in a cross-network access scene can be improved, and the communication security is further improved.

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 Applications(China)
IPC IPC(8): H04W60/00H04W12/02H04W12/06H04W48/16
CPCH04W12/02H04W12/06H04W48/16H04W60/00
Inventor 李飞张博
Owner HUAWEI TECH CO LTD
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