Method and apparatus for performing inter-MeNB handover without SeNB change in wireless communication system
AssigneeLG Electronics Inc.
InventorsJian Xu, Daewook Byun
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Abstract
A method performed by a source master node (MN) in an inter-MN handover procedure is discussed. The method includes transmitting a handover request message to a target MN, wherein the handover request message includes an identifier (ID) of a secondary node (SN), receiving a handover request acknowledge message from the target MN in a response to the handover request message, wherein the handover request acknowledge message includes first information indicating that the SN is kept in the inter-MN handover procedure, and transmitting a SN release request message to the SN, wherein the SN release request message includes second information indicating that the SN is kept in the inter-MN handover procedure.
Claims6
A method performed by a source master node (MN) of an inter-MN handover procedure, the method comprising:
- establishing a dual connectivity between a wireless device and each of the source MN and a secondary node (SN);
- initiating the inter-MN handover procedure;
- transmitting a handover request message to a target MN of the inter-MN handover procedure, wherein the handover request message includes an identifier (ID) of the SN;
- receiving a handover request acknowledge message from the target MN in a response to the handover request message, wherein the handover request acknowledge message includes first information informing that a UE context for the wireless device in the SN is kept in the inter-MN handover procedure;
- and
- transmitting a SN release request message to the SN, wherein the SN release request message includes second information informing that the UE context for the wireless device in the SN is kept in the inter-MN handover procedure,
- wherein the wireless device is to be handed over to the target MN without change of the SN after transmitting the SN release request message.
A source master node (MN) of an inter-MN handover procedure, the source MN comprising:
- a memory;
- a transceiver;
- and
- a processor, operably coupled to the memory and the transceiver, wherein the source MN is configured to:
- establish a dual connectivity between a wireless device and each of the source MN and a secondary node (SN);
- initiate the inter-MN handover procedure;
- transmit a handover request message to a target MN of the inter-MN handover procedure, wherein the handover request message includes an identifier (ID) of the SN;
- receive a handover request acknowledge message from the target MN in a response to the handover request message, wherein the handover request acknowledge message includes first information informing that a UE context for the wireless device in the SN is kept in the inter-MN handover procedure;
- and
- transmit a SN release request message to the SN, wherein the SN release request message includes second information informing that the UE context for the wireless device in the SN is kept in the inter-MN handover procedure,
- wherein the wireless device is to be handed over to the target MN without change of the SN after transmitting the SN release request message.
Dependencies are inferred from the claim text.