Apparatus and method for maximum power saving in sleep mode
AssigneeSamsung Electronics Co., Ltd.
InventorBaowei Ji
Life of this patent
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Abstract
An apparatus and method for an improved sleep mode in a mobile terminal are provided. The apparatus includes a transceiver for communicating with a base station, a modem for modulating and demodulating signals for transmission via the transceiver or received via the transceiver, and a controller for controlling a sleep cycle of the mobile terminal, the sleep cycle including a listening window and a sleep window. The controller controls the sleep cycle based on an Advanced Mobile Station (AMS) timer, a Hybrid Repeat Request (HARQ) Downlink (DL) Retransmission timer, a HARQ DL Gap timer, and a HARQ Uplink (UL) Gap timer.
Claims16
A method for managing a sleep cycle in a mobile terminal, and the method comprising:
- entering, by the mobile terminal, a listening window of the sleep cycle;
- remaining in the listening window while an Advanced Mobile Station (AMS) timer maintained by the mobile terminal has not expired, while a Hybrid Automatic Repeat Request (HARQ) Downlink (DL) Retransmission timer has not expired, while a maximum number of Uplink (UL) retransmissions has not been reached, while UL traffic from the mobile station is pending for transmission, or while a default listening window has not expired and no negative traffic indication has been received from a base station;
- and
- transitioning, by the mobile terminal, from the listening window to a sleep window of the sleep cycle when the mobile terminal receives a negative traffic indication from the base station or when the AMS timer, the HARQ DL Retransmission timer, a HARQ DL Gap timer, and a HARQ UL Gap timer have all expired,
- wherein the mobile terminal does not transmit or receive data to or from the base station while operating in the sleep window.
A method for managing a sleep cycle of a mobile terminal in a base station, the method comprising:
- determining that the mobile terminal is still in a listening window of the sleep cycle when the listening window has not been expressly terminated by the base station, an Advanced Base Station (ABS) timer managed by the base station has not expired, a Hybrid Automatic Repeat Request (HARQ) Downlink (DL) Retransmission timer managed by the base station has not expired, a number of retransmissions of a DL HARQ burst is not equal to a maximum number of DL HARQ burst retransmissions, and a default listening window period has not ended and a negative traffic indicator has not been sent to the mobile terminal;
- and
- determining that the mobile terminal has entered a sleep window of the sleep cycle when a negative traffic indicator is transmitted to the mobile terminal from the base station, and the ABS timer, the HARQ DL Retransmission timer, a HARQ DL Gap timer managed by the base station, and a HARQ Uplink (UL) Gap timer managed by the base station have all expired.
A mobile terminal, comprising:
- a transceiver for communicating with a base station;
- a modem for modulating and demodulating signals for transmission via the transceiver or received via the transceiver;
- and
- a controller for controlling a sleep cycle of the mobile terminal, the sleep cycle including a listening window and a sleep window,
- wherein the controller controls the sleep cycle based on an Advanced Mobile Station (AMS) timer, a Hybrid Repeat Request (HARQ) Downlink (DL) Retransmission timer, a HARQ DL Gap timer, and a HARQ Uplink (UL) Gap timer.
Dependencies are inferred from the claim text.