Mobile communication system, base station, mobile station, and power-saving transmission and reception method used in them

A communication method for a mobile station which communicates with a base station using a radio channel, the method comprising:

• switching between a packet reception period, during which packet reception can be executed, and a packet reception halt period, during which packet reception is halted;
• transmitting to the base station, a result of receiving a downlink packet sent from the base station, as a reception result notification signal according to a Hybrid Automatic Request (HARQ) process;
• and
• extending the packet reception period if a packet reception fault is determined,
• wherein the packet reception period is capable of being extended to a next packet reception period.

A mobile station configured to communicate with a base station using a radio channel, the mobile station comprising:

• at least one processor configured to execute:
• a switching unit configured to switch between a packet reception period, during which packet reception can be executed, and a packet reception halt period, during which packet reception is halted;
• a transmission unit configured to transmit, to the base station, a result of receiving a downlink packet sent from the base station, as a reception result notification signal according to a Hybrid Automatic Request (HARQ) process;
• and
• a reception period determination unit configured to increase the packet reception period if a packet reception fault is determined,
• wherein the packet reception halt period after the packet reception period is shortened if the packet reception period is increased.

A communication method for a mobile station which communicates with a base station using a radio channel, the method comprising:

• switching, by the mobile station, between a packet reception period, during which packet reception can be executed, and a packet reception halt period, during which packet reception is halted;
• transmitting to the base station, a result of receiving a downlink packet sent from the base station, as a reception result notification signal according to a Hybrid Automatic Request (HARQ) process;
• and
• increasing the packet reception period if a packet reception fault is determined,
• wherein the packet reception halt period after the packet reception period is shortened if the packet reception period is increased.