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Method and apparatus for direct communication key establishment

A communication key and user equipment device technology, which is applied in the field of direct communication key establishment and equipment, and can solve problems such as complication of preconfigured shared key tasks

Inactive Publication Date: 2018-06-08
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Additionally, two ProSe-enabled UEs wishing to communicate, or a UE and a UE-to-network relay, may be served by different home PLMNs, or one or both devices may roam into a new PLMN, further making the task of pre-configuring the shared key complication
Pre-configuring a shared key in all relevant ProSe-enabled devices to enable all possible communication paths that can be expected is therefore an extremely complex process

Method used

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  • Method and apparatus for direct communication key establishment
  • Method and apparatus for direct communication key establishment
  • Method and apparatus for direct communication key establishment

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Embodiment Construction

[0140]To avoid having to pre-configure a shared key in all relevant ProSe-enabled devices to enable all possible communication paths that can be expected, as discussed in the introduction, it has been suggested in application number PCT / EP2015 / 050864 to use the generic Bootstrap Architecture (GBA) procedures to establish a shared secret. However, such procedures require a ProSe-enabled UE to be at least within E-UTRAN coverage in order to perform an initial bootstrap procedure after which the UE may move out of network coverage. If the ProSe enabled UE is not within E-UTRAN coverage, or cannot perform the bootstrap procedure while in E-UTRAN coverage, then pre-configuring the shared key is still the only option in case of the association challenges discussed above.

[0141] It is therefore an object of the present invention to provide methods, devices and computer readable media that at least partially address one or more of the challenges discussed above. Therefore, when the...

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Abstract

A method, performed by a User Equipment device (UE), for obtaining a key for direct communication with a device over an air interface, wherein the UE has previously acquired a transaction identifier received from a Bootstrapping Server Function (BSF), in a Generic Bootstrapping Architecture (GBA), procedure, is provided. The method comprises storing the transaction identifier, sending the transaction identifier to the device and requesting key generation for direct communication with the device. If the transaction identifier is invalid, the method further comprises receiving from the device adevice identifier and key generation information, deriving a session shared key from at least the key generation information, and deriving a direct communication key from at least the session shared key and the device identifier.

Description

technical field [0001] The invention relates to a method for establishing keys for direct communication between a user equipment device UE and a device. The invention also relates to a UE, a device and a direct communication element and a computer program configured to perform a method for establishing a key for a direct communication between a UE and a device. Background technique [0002] Direct communication involves establishing a radio connection between two devices without transitioning through an access network of a cellular communication network. Direct communication can be used to establish communication between two user equipment devices (UE) that may or may not be out of network coverage, or it can enable one device to act as a Access to network services for out-of-coverage devices. In the 3rd Generation Partnership Project (3GPP), direct communication can be achieved via Proximity Neighbor Service (ProSe), as stated in TS 33.303 and other standard documents. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W12/04H04W4/50
CPCH04W76/14H04W4/50H04W8/005H04W12/0431H04W12/04H04W84/047
Inventor V.莱托弗塔M.维夫韦森V.托尔维南K.普法伊费尔
Owner TELEFON AB LM ERICSSON (PUBL)
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