Method for performing handover procedure and creating data
AssigneeLG Electronics Inc.
InventorYoon Jung Cho
Life of this patent
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Abstract
A method and device for performing handover by a mobile terminal from a source base station to a target base station, the mobile terminal having a RRC layer, a RLC layer and an PDCP layer. The method includes receiving a handover initiation message; and performing handover from the source base station to the target base station, including reassembling RLC SDUs from at least one PDU when possible and delivering the reassembled RLC SDUs from the RLC layer to an upper layer.
Claims18
A method of performing handover by a mobile terminal from a source base station to a target base station, the mobile terminal having a Radio Resource Control (RRC) layer and a Radio Link Control (RLC) layer, the method comprising:
- receiving, at the RRC layer of the mobile terminal, a handover command from the source base station;
- transmitting, by the RRC layer of the mobile terminal to the RLC layer of the mobile terminal, an indication associated with the handover command;
- upon receiving the indication, reassembling, at the RLC layer of the mobile terminal, at least one RLC service data unit (SDU) from at least one protocol data unit (PDU) having a sequence number that is less than a variable, wherein the variable indicates a sequence number following a highest sequence number among at least one PDU received out of sequence by the RLC layer of the mobile terminal;
- and
- delivering the reassembled at least one RLC SDU from the RLC layer of the mobile terminal to an upper layer of the mobile terminal.
A mobile terminal configured to perform handover from a source base station to a target base station, the mobile terminal having a Radio Resource Control (RRC) layer and a Radio Link Control (RLC) layer, the mobile terminal comprising:
- a radio frequency (RF) unit configured to receive and transmit a signal;
- and
- a processor coupled to the RF unit and configured to:
- receive, at the RRC layer of the mobile terminal, a handover command from the source base station;
- transmit, by the RRC layer of the mobile terminal to the RLC layer of the mobile terminal, an indication associated with the handover command;
- upon receiving the indication, reassemble, at the RLC layer of the mobile terminal, at least one RLC service data unit (SDU) from at least one protocol data unit (PDU) having a sequence number that is less than a variable, wherein the variable indicates a sequence number following a highest sequence number among at least one PDU received out of sequence by the RLC layer of the mobile terminal;
- and
- deliver the reassembled at least one RLC SDU from the RLC layer of the mobile terminal to an upper layer of the mobile terminal.
A mobile terminal configured to perform handover from a source base station to a target base station, the mobile terminal having a Radio Resource Control (RRC) layer and a Radio Link Control (RLC) layer, the mobile terminal comprising:
- a radio frequency (RF) unit configured to receive and transmit a signal;
- and
- a processor coupled to the RF unit and configured to:
- receive, at the RRC layer of the mobile terminal, a handover command from the source base station;
- transmit, by the RRC layer of the mobile terminal to the RLC layer of the mobile terminal, an indication associated with the handover command;
- upon receiving the indication, reassemble, at the RLC layer of the mobile terminal, at least one RLC service data unit (SDU) from at least one protocol data unit (PDU) having a sequence number that is less than a variable, wherein the variable indicates a sequence number following a highest sequence number among at least one PDU received out of sequence by the RLC layer of the mobile terminal;
- deliver, at the RLC layer of the mobile terminal, the reassembled at least one RLC SDU to an upper layer of the mobile terminal;
- and
- reorder, at the upper layer of the mobile terminal, the reassembled at least one RLC SDU.
Dependencies are inferred from the claim text.