Node and method for enabling a wireless terminal to be served by multiple cells in a communications network
AssigneeTelefonaktiebolaget LM Ericsson (publ)
InventorsOumer Teyeb, Angelo Centonza, Fredrik Gunnarsson, Niklas Johansson, Stefan Wager, Pontus Wallentin
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Abstract
Example embodiments presented herein are directed towards a wireless terminal and base station, and corresponding methods therein, for providing a handover for a subset of bearers associated with the wireless terminal. The subset of bearers is less than a total number of bearers associated with the wireless terminal. Thus, upon the completion of the handover procedure, at least one bearer will stay connected with a source base station.
Claims9
A method performed by a wireless terminal that is connected to a source radio base station via a plurality of radio bearers, the method comprising:
- receiving a message from a source base station or a target base station, indicating a selective handover of the wireless terminal from the source base station to the target base station;
- and
- performing the selective handover towards the target base station, in which fewer than all radio bearers in the plurality of radio bearers are handed over for connecting the wireless terminal to the target base station and connectivity between the wireless terminal and the source base station is maintained using one or more of the radio bearers not handed over to the target base station;
- wherein the message indicates that no radio bearers from the plurality of radio bearers are being handed over, and wherein performing the selective handover towards the target base station correspondingly comprises acquiring time alignment and synchronization with the target base station in preparation for a transfer of a later indicated subset of the radio bearers in the plurality of radio bearers to the target base station.
A wireless terminal comprising:
- radio circuitry configured for communicating with base stations of a wireless communication network;
- and
- processing circuitry operatively associated with the radio circuitry and configured to:
- receive a message from a source base station or a target base station, indicating a selective handover of the wireless terminal from the source base station to the target base station;
- and
- perform the selective handover towards the target base station, in which fewer than all radio bearers in the plurality of radio bearers are handed over for connecting the wireless terminal to the target base station and connectivity between the wireless terminal and the source base station is maintained using one or more of the radio bearers not handed over to the target base station;
- wherein the message indicates that no radio bearers from the plurality of radio bearers are being handed over, and wherein the processing circuitry is configured to respond by acquiring time alignment and synchronization with the target base station in preparation for a transfer of a later indicated subset of the radio bearers in the plurality of radio bearers to the target base station.
Dependencies are inferred from the claim text.