Method for reconfiguring data radio bearer and user equipment

A method performed by a base station (eNB), comprising:

• transmitting an RRCConnectionReconfiguration message which contains an indication to reconfigure a first data radio bearer (DRB) to a second DRB and a drb-ToAddModList parameter that contains a list of DRBs needed to be added;
• reconfiguring a PDCP entity in accordance with a pdcp-Config parameter, if the pdcp-Config parameter included in the drb-ToAddModList parameter, wherein the pdcp-Config parameter is used to set configurable PDCP parameters for configuring the first DRB to the second DRB;
• and
• reconfiguring an RLC entity and/or a DTCH logical channel in accordance with an rlc-Config parameter and a logicalChannelConfig parameter, if the rlc-Config parameter and the logicalChannelConfig parameter are included in the drb-ToAddModList parameter, wherein the rlc-Config parameter is used to specify RLC configuration for configuring the first DRB to the second DRB, and the logicalChannelConfig parameter is used to configure logical channel parameters, wherein
• the first DRB is a bearer whose radio protocols are located in the eNB and are not located in a WLAN to use eNB radio resources among the eNB radio resources and WLAN resources, and
• the second DRB is a bearer whose radio protocols are located in both the eNB and the WLAN to use both the eNB radio resources and the WLAN resources.

A user equipment (UE) comprising:

• receiving circuitry configured to receive an RRCConnectionReconfiguration message which contains an indication to reconfigure a first data radio bearer (DRB) to a second DRB and a drb-ToAddModList parameter that contains a list of DRBs needed to be added;
• and
• reconfiguring circuitry configured to reconfigure a PDCP entity in accordance with a pdcp-Config parameter, if the pdcp-Config parameter included in the drb-ToAddModList parameter, wherein the pdcp-Config parameter is used to set configurable PDCP parameters for configuring the first DRB to the second DRB, wherein
• the reconfiguring circuitry is further configured to reconfigure an RLC entity and/or a DTCH logical channel in accordance with an rlc-Config parameter and a logicalChannelConfig parameter, if the rlc-Config parameter and the logicalChannelConfig parameter are included in the drb-ToAddModList parameter, wherein
• the rlc-Config parameter is used to specify RLC configuration for configuring the first DRB to the second DRB, and the logicalChannelConfig parameter is used to configure logical channel parameters,
• the first DRB is a bearer whose radio protocols are located in a base station (eNB) and are not located in a WLAN to use eNB radio resources among the eNB radio resources and WLAN resources, and
• the second DRB is a bearer whose radio protocols are located in both the eNB and the WLAN to use both the eNB radio resources and the WLAN resources.

A base station (eNB) comprising:

• transmitting circuitry configured to transmit an RRCConnectionReconfiguration message which contains an indication to reconfigure a first data radio bearer (DRB) to a second DRB and a drb-ToAddModList parameter that contains a list of DRBs needed to be added;
• and
• reconfiguring circuitry configured to reconfigure a PDCP entity in accordance with a pdcp-Config parameter, if the pdcp-Config parameter included in the drb-ToAddModList parameter, wherein the pdcp-Config parameter is used to set configurable PDCP parameters for configuring the first DRB to the second DRB;
• wherein
• the reconfiguring circuitry is further configured to reconfigure an RLC entity and/or a DTCH logical channel in accordance with an rlc-Config parameter and a logicalChannelConfig parameter, if the rlc-Config parameter and the logicalChannelConfig parameter are included in the drb-ToAddModList parameter, wherein
• the rlc-Config parameter is used to specify RLC configuration for configuring the first DRB to the second DRB, and the logicalChannelConfig parameter is used to configure logical channel parameters,
• the first DRB is a bearer whose radio protocols are located in the eNB and are not located in a WLAN to use eNB radio resources among the eNB radio resources and WLAN resources, and
• the second DRB is a bearer whose radio protocols are located in both the eNB and the WLAN to use both the eNB radio resources and the WLAN resources.