US 11,601,858 B2 · Relocation of a user equipment connection from a source radio network controller RNC to a target RNC initiated via a core network

Abstract

A method performed by a source Radio Network Controller (RNC) for handling a relocation of a User Equipment (UE) connection from the source RNC to a target RNC to serve the UE in an ongoing wireless communication is provided. An interface between the source RNC and the target RNC is available. When all radio links in the ongoing wireless communication are controlled by the target RNC and a triggering condition is fulfilled for relocation of the UE connection from the source RNC to the target RNC, the source RNC decides (202) to discontinue to use said interface. Then a core network is used for sending (204) to the target RNC, a triggering of the relocation procedure for relocating the source RNC to the target RNC to serve the UE. A Radio Resource Control (RRC) configuration defined by the target RNC to be used after the relocation to the target RNC is then obtained (205) via the core network. The RRC configuration, defined by the target RNC, is sent (206) to the UE enabling the UE to switch from an RRC configuration defined by the source RNC to the RRC configuration defined by the target RNC.

Claims13

Dependent claims

A method performed by a source Radio Network Controller (RNC) for handling a relocation of a User Equipment (UE) connection from the source RNC to a target RNC during an ongoing wireless communication, the method comprising:

when a distance between the UE and a border between the source RNC and the target RNC is below a threshold value, ordering the target RNC to establish at least one radio link to be controlled by the target RNC for the ongoing wireless communication, using an available interface between the source RNC and the target RNC;
when all radio links in the ongoing wireless communication are controlled by the target RNC and a triggering condition is fulfilled for relocation of the UE connection from the source RNC to the target RNC, deciding to discontinue use of the available interface between the source RNC and the target RNC;
sending, to the target RNC via a core network, a triggering of a relocation procedure for relocating the UE connection from the source RNC to the target RNC;
obtaining, from the target RNC via the core network, a Radio Resource Control (RRC) configuration defined by the target RNC to be used by the UE after relocation to the target RNC;
and
sending the obtained RRC configuration to the UE, thereby enabling the UE to switch from an RRC configuration defined by the source RNC to the RRC configuration defined by the target RNC.

3 more elements

A source Radio Network Controller (RNC) configured to handle relocation of a User Equipment (UE) connection from the source RNC to a target RNC during an ongoing wireless communication, wherein the source RNC comprises:

one or more processors;
and
memory storing executable instructions that, when executed by the one or more processors, configure the source RNC to:
when a distance between the UE and a border between the source RNC and the target RNC is below a threshold value, order the target RNC to establish at least one radio link to be controlled by the target RNC for the ongoing wireless communication, using an available interface between the source RNC and the target RNC;
when all radio links in the ongoing wireless communication are controlled by the target RNC and a triggering condition is fulfilled for relocation of the UE connection from the source RNC to the target RNC, decide to discontinue use of the available interface between the source RNC and the target RNC;
send, to the target RNC via a core network, a triggering of a relocation procedure for relocating the UE connection from the source RNC to the target RNC;
obtain, from the target RNC via the core network, a Radio Resource Control (RRC) configuration defined by the target RNC to be used by the UE after relocation to the target RNC;
and
send the obtained RRC configuration to the UE, thereby enabling the UE to switch from an RRC configuration defined by the source RNC to the RRC configuration defined by the target RNC.

6 more elements

Dependencies are inferred from the claim text.

Relocation of a user equipment connection from a source radio network controller RNC to a target RNC initiated via a core network

Life of this patent

Relocation of a user equipment connection from a source radio network controller RNC to a target RNC initiated via a core network

Life of this patent

Abstract

Claims13