Granted Patent
B2
US 12,231,966 · App. 18/397,296 · Granted Feb 18, 2025
Radio access network node, radio terminal, and method therefor
Assignee:
NEC CORPORATION
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Abstract
A target RAN node ( 3 ) receives, from a core network ( 5 ), a message requesting a handover of a radio terminal ( 1 ) from a bearer-based network to a bearer-less network. This handover request message includes flow information related to at least one session to be established in the bearer-less network in order to transfer at least one packet flow of the radio terminal ( 1 ). The target RAN node ( 3 ) transmits, to the core network ( 5 ), a handover acknowledge response message containing a transparent container that includes a radio resource configuration information derived from the flow information and is to be forwarded to a source RAN node associated ( 2 ) through the core network ( 5 ). It is thus, for example, possible to appropriately configuring an AS layer of a target RAT in an inter-RAT handover.
Claims (12)
1. A method of a target radio access network (RAN) node, the method comprising:
receiving a Handover Request message from a core network during a handover of a radio terminal from a source RAN node to the target RAN node, the Handover Request message including information related to at least one Protocol Data Unit (PDU) session, the information including a flow indicator, a flow QoS parameter and priority indicator, the priority indicator indicating a relative importance of a flow compared to other flows; and
transmitting to the core network, in response to the Handover Request message, a Handover Request Acknowledge message including a Target to Source Transparent Container, the Target to Source Transparent Container including radio resource configuration information,
wherein the PDU session includes at least one flow, and
wherein a QoS is handled on a per-flow basis.
2. The method according to claim 1 , wherein the radio resource configuration information is transferred from the core network to the source RAN node.
3. A method of a core network, the method comprising:
transmitting a Handover Request message to a target radio access network (RAN) node during a handover of a radio terminal from a source RAN node to the target RAN node, the Handover Request message including information related to at least one Protocol Data Unit (PDU) session, the information including a flow indicator, a flow QoS parameter and priority indicator, the priority indicator indicating a relative importance of a flow compared to other flows; and
receiving a Handover Request Acknowledge message from the target RAN node in response to the Handover Request message, the Handover Request Acknowledge message including a Target to Source Transparent Container, the Target to Source Transparent Container including radio resource configuration information,
wherein the PDU session includes at least one flow, and
wherein a QoS is handled on a per-flow basis.
4. The method according to claim 3 , wherein the radio resource configuration information is transferred from the core network to the source RAN node.
Continuity (4)
Continuation
16321877
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