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US 8,787,317 B2Granted
Wireless handover optimization
AssigneeTelefonaktiebolaget L M Ericsson (publ)
InventorsStefan Johansson, Daniel Larsson, Peter Ostrup
Life of this patent
Estimating the term…
Abstract
Aspects of the present invention relate to improved systems and methods for handing over a UE from a source node to a target node. In some embodiments, the target node receives UL and DL count information directly from the UE being handed over, rather than from the source node or from a core network node.
Claims22
A method for handing over a user equipment (UE) from a source node to a target node, comprising:
- transmitting from a source node to another node a first handover message, wherein the first handover message requests handover of a connection associated with a UE;
- receiving at the source node a second handover message, wherein the second handover message acknowledges receipt of the first handover message;
- in response to receiving the second handover message, transmitting from the source node a reconfiguration message to the UE;
- after transmitting the reconfiguration message from the source node to the UE, continuing to schedule at the source node transmissions for the connection of the UE until the source node receives a message of a first message type for the connection;
- and
- upon receiving at the source node the message of the first message type for the connection, ceasing to schedule at the source node transmissions for the connection.
3 more elements
A method performed by a user equipment (UE), comprising:
- establishing a connection with a source node;
- transmitting data units to and receiving data units from the source node using the connection;
- after establishing the connection, receiving from the source node a reconfiguration message identifying a target node;
- and
- after receiving the reconfiguration message, transmitting to the target node a message comprising a downlink (DL) count value and an uplink (UL) count value for the connection.
2 more elements
A method for handing over a user equipment (UE) from a source node to a target node, comprising:
- receiving at a target node a first handover message transmitted from another node, the first handover message indicating a handover has been requested for a connection associated with a UE;
- transmitting to the another node a second handover message, wherein the second handover message acknowledges receipt of the first handover message;
- after transmitting the second handover message and before scheduling the UE in the target node, receiving at the target node a message transmitted from the UE comprising a DL count value and a UL count value for the connection;
- and
- after receiving the message from the UE, using the DL count value or the UL count value in transmitting data to the UE or in receiving data from the UE.
2 more elements
An access point, comprising:
- a first receiver configured to receive data from a user equipment (UE);
- a first transmitter configured to transmit data to the UE;
- a second transmitter configured to transmit data to a node;
- a second receiver configured to transmit data to the node;
- and
- a data processing system configured to:
- transmit to the node a first handover message, wherein the first handover message requests a handover of a connection associated with a UE;
- receive a second handover message, wherein the second handover message acknowledges receipt of the first handover message;
- in response to receiving the second handover message, transmit a reconfiguration message to the UE;
- after transmitting the reconfiguration message to the UE, continue to schedule transmissions for the connection of the UE until the source node receives a message of a first message type for the connection;
- and
- upon receiving the message of the first message type for the connection, ceasing to schedule transmissions for the connection.
9 more elements
A user equipment (UE), comprising:
- a transmitter configured to transmit data;
- a receiver configured to receive data;
- and
- a data processing system configured to:
- establish a connection with a source node;
- transmit data units to and receive data units from the source node using the connection;
- after establishing the connection, receive from the source node a reconfiguration message identifying a target node;
- and
- transmit to the target node a message comprising a downlink (DL) count value and an uplink (UL) count value in response to receiving the reconfiguration message.
6 more elements
An access point, comprising:
- a first receiver configured to receive data from a user equipment (UE);
- a first transmitter configured to transmit data to the UE;
- a second transmitter configured to transmit data to a node;
- a second receiver configured to transmit data to the node;
- and
- a data processing system configured to:
- receive a first handover message transmitted from the node, the first handover message indicating a handover has been requested for a connection associated with the UE;
- transmit to the node a second handover message, wherein the second handover message acknowledges receipt of the first handover message;
- after transmitting the second handover message and before scheduling the UE, receive a message transmitted from the UE comprising a DL count value and a UL count value for the connection;
- and
- after receiving the message from the UE, using the DL count value or the UL count value in transmitting data to the UE or in receiving data from the UE.
8 more elements
Dependencies are inferred from the claim text.