Re-establishing a radio resource control connection
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsVesa Lehtovirta, Prajwol Kumar Nakarmi, Monica Wifvesson
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Abstract
A method for re-establishing a Radio Resource Control (RRC) connection between a UE and a target eNB. The method is performed by the UE. The method includes the UE receiving an RRC Connection Reestablishment message from the target eNB, the RRC Connection Reestablishment message including a DL authentication token which has been generated by an MME and has had a Non Access Stratum integrity key as input. The method also includes the UE authenticating the received DL authentication token.
Claims17
A method for re-establishing a Radio Resource Control (RRC) connection between a User Equipment (UE) and a target evolved NodeB (eNB), for Control Plane Cellular Internet-of-Things optimization, the method comprising:
- the UE receiving an RRC Connection Reestablishment message transmitted by the target eNB, the RRC Connection Reestablishment message including a downlink (DL) authentication token which was calculated by a Mobility Management Entity (MME) using a set of input parameters, wherein the set of input parameters includes a Non Access Stratum (NAS) integrity key and a target cell's identity;
- and
- the UE authenticating the received DL authentication token, wherein authenticating the received DL authentication token comprises the UE comparing the received DL authentication token to a token calculated by the UE using the integrity algorithm and the set of input parameters.
A method for re-establishing a Radio Resource Control (RRC) connection between a User Equipment (UE) and a target evolved NodeB (eNB), for Control Plane Cellular Internet-of-Things optimization, the method being performed by the target eNB and comprising:
- receiving, from a Mobility Management Entity (MME), a message including a downlink (DL) authentication token that was calculated by the MME using a set of input parameters, wherein the set of input parameters includes a Non Access Stratum (NAS) integrity key and a target cell's identity;
- and
- sending an RRC Connection Reestablishment message to the UE, the RRC Connection Reestablishment message including the DL authentication token.
A User Equipment (UE) for re-establishing a Radio Resource Control (RRC) connection between the UE and a target evolved NodeB (eNB), for Control Plane Cellular Internet-of-Things optimization, the UE comprising:
- a processor;
- and
- a computer program product storing instructions that, when executed by the processor, causes the UE to:
- process an RRC Connection Reestablishment message transmitted by the target eNB and received at the UE, the RRC Connection Reestablishment message including a downlink (DL) authentication token which was calculated by a Mobility Management Entity (MME) using a set of input parameters, wherein the set of input parameters includes a Non Access Stratum (NAS) integrity key and a target cell's identity;
- and
- compare the received DL authentication token to a token calculated by the UE using the integrity algorithm and the set of input parameters to authenticate the received DL authentication.
A target evolved Node B (eNB), for re-establishing a Radio Resource Control (RRC) connection between a User Equipment (UE) and the target eNB, for Control Plane Cellular Internet-of-Things optimization, the target eNB comprising:
- a processor;
- and
- a computer program product storing instructions that, when executed by the processor, causes the target eNB to:
- process a message transmitted by a Mobility Management Entity (MME) and received at the target eNB, the message including a downlink (DL) authentication token that was calculated by the MME using an integrity algorithm and a set of input parameters, wherein the set of input parameters includes a Non Access Stratum (NAS) integrity key and a target cell's identity;
- and
- send an RRC Connection Reestablishment message to the UE, the RRC Connection Reestablishment message including the DL authentication token.
Dependencies are inferred from the claim text.