Wireless communication system, terminal apparatus, base station apparatus, wireless communication method, and integrated circuit
In a wireless communication system, a terminal apparatus is capable of reporting, to a base station apparatus, information indicating a mobility state of the terminal apparatus. In a case where the terminal apparatus reports information (history information) to the base station apparatus as mobility state indicating information, the terminal apparatus notifies the base station apparatus of a radio resource control connection setup complete message containing information indicating the presence of the history information that is notified as the mobility state indicating information. The history information contains an identifier of a cell that the terminal apparatus visited and the duration of stay in the cell. The base station apparatus notifies the terminal apparatus of information as to whether to report the mobility state indicating information. In a case where the terminal apparatus reports the mobility state indicating information on the basis of the information notified by the base station apparatus, the terminal apparatus reports the history information to the base station apparatus using a radio resource control message different from the radio resource control connection setup complete message.
1. A terminal apparatus which communicates with a base station apparatus, the terminal apparatus comprising:
a storage that stores history information which contains first information which concerns a cell which the terminal apparatus visited; and
radio resource control circuitry that
includes second information in a radio resource control connection setup complete message, the second information indicating a presence of the history information, the radio resource control connection setup complete message not including the history information, the inclusion of the second information being performed in a case that the history information is present in the storage; wherein
the radio resource control circuitry notifies the base station apparatus of the radio resource control connection setup complete message; and
the history information contains:
an identifier of the cell which the terminal apparatus visited and
a duration of stay in the cell.
2. The terminal apparatus according to claim 1 , wherein
in a case that third information is notified from the base station apparatus, the third information is to request the history information,
the terminal apparatus reports the history information to the base station apparatus, the report being performed by using a radio resource control message, the radio resource control message being different from the radio resource control connection setup complete message.
3. A base station apparatus which communicates with a terminal apparatus, the base station apparatus comprising:
radio resource control circuitry that receives, from the terminal apparatus, which includes a storage that stores history information which contains first information which concerns a cell which the terminal apparatus visited, a radio resource control connection setup complete message, the radio resource control connection setup complete message including second information, the second information indicating a presence of the history information, wherein
the radio resource control connection setup complete message does not include the history information,
the reception is performed in a case that the history information is present in the storage; and
the history information contains:
an identifier of the cell which the terminal apparatus visited and
a duration of stay in the cell.
4. The base station apparatus according to claim 3 , wherein
the radio resource control circuitry receives the history information from the terminal apparatus, the history information being reported by using a radio resource control message, and the radio resource control message being different from the radio resource control connection setup complete message.
5. A wireless communication method performed by a terminal apparatus which communicates with a base station apparatus, the wireless communication method comprising:
including second information in a radio resource control connection setup complete message, the second information indicating a presence of history information which contains first information which concerns a cell which the terminal apparatus visited is present, the radio resource control connection setup complete message not including the history information, the including being performed in a case that the history information is present in a storage of the terminal apparatus, the storage storing the history information; and
notifying the base station apparatus of the radio resource control connection setup complete message; wherein
the history information contains:
an identifier of the cell which the terminal apparatus visited and
a duration of stay in the cell.
6. A wireless communication method performed by a base station apparatus which communicates with a terminal apparatus, the wireless communication method comprising:
receiving, from the terminal apparatus which includes a storage that stores history information which contains first information which concerns a cell which the terminal apparatus visited, a radio resource control connection setup complete message, the radio resource control connection setup complete message including second information, wherein
the second information indicates a presence of the history information, the radio resource control connection setup complete message not including the history information,
the receiving being performed in a case that the history information is present in the storage; and
the history information contains:
an identifier of the cell which the terminal apparatus visited and
a duration of stay in the cell.