MOBILE STATION AND RADIO BASE STATION

• US 20150117404A1
• Filed: 04/18/2013
• Published: 04/30/2015
• Est. Priority Date: 05/10/2012
• Status: Abandoned Application

• Current Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Original Assignee: NTT Docomo Incorporated (Nippon Telegraph and Telephone Corporation)
• Inventors: Uchino, Tooru, Takahashi, Hideaki, Yagyu, Kengo, Sagae, Yuta, Kiyoshima, Kohei, Takiguchi, Takahiro
• Application Number:
  US14/373,649
• Publication Number:
  US 20150117404A1
• Time in Patent Office: Days
• US Class Current: 370/331
• CPC Class Codes: H04L 5/0078 Timing of allocation
• CPC Class Codes: H04W 36/0069 in case of dual connectivity, e.g. decoupled uplink/downlink
• CPC Class Codes: H04W 36/00692 using simultaneous multiple data streams, e.g. cooperative multipoint [CoMP], carrier aggregation [CA] or multiple input multiple output [MIMO] allocation of physical resources in CoMP or in CA H04L5/0035
• CPC Class Codes: H04W 36/06 Reselecting a communication resource in the serving access point
• CPC Class Codes: H04W 56/0045 compensating for timing error by altering transmission time

Abstract

A mobile station (UE) according to the present invention includes a control unit (12) configured to deactivate Scell #2 when the mobile station (UE) is instructed to modify a TAG, to which the Scell #2 belongs, from TAG #2 to TAG #1.

Claims

1. A mobile station, which is configured to be capable of performing carrier aggregation using a primary cell and a secondary cell, the mobile station comprising:

a control unit configured to deactivate a target secondary cell when it is instructed to modify a timing advance group, to which the target secondary cell belongs, from a first timing advance group to a second timing advance group.

2. A mobile station, which is configured to be capable of performing carrier aggregation using a primary cell and a secondary cell, the mobile station comprising:

a transmission unit configured such that an uplink signal is not transmitted in a secondary cell belonging to a timing advance group in which a time alignment timer is stopped; and

a control unit configured to stop a time alignment timer of at least one of a first timing advance group and a second timing advance group when it is instructed to modify a timing advance group, to which a target secondary cell belongs, from the first timing advance group to the second timing advance group.

3. A radio base station, which is used in a mobile communication system configured such that a mobile station is capable of performing carrier aggregation using a primary cell and a secondary cell, the radio base station comprising:

a control unit configured to deactivate a target secondary cell before instructing the mobile station to modify a timing advance group, to which the target secondary cell belongs, from a first timing advance group to a second timing advance group.

4. A radio base station, which is used in a mobile communication system configured such that a mobile station is capable of performing carrier aggregation using a primary cell and a secondary cell, the radio base station comprising:

a control unit configured to instruct the mobile station to perform handover when instructing the mobile station to modify a timing advance group, to which a target secondary cell belongs, from a first timing advance group to a second timing advance group.

5. A radio base station, which is used in a mobile communication system configured such that a mobile station is capable of performing carrier aggregation using a primary cell and a secondary cell, the radio base station comprising:

a control unit configured to stop scheduling in a target secondary cell when instructing the mobile station to modify a timing advance group, to which the target secondary cell belongs, from a first timing advance group to a second timing advance group.

6. The radio base station according to claim 5, wherein the control unit is configured to deconfigure SRS transmitted by the mobile station prior to the instruction.

7. (canceled)