Mode transition method for wireless data service in a mobile station
First Claim
1. A method for determining, by a mobile station, whether a base station has data to transmit during a data service, where the mobile station is in a control hold mode in a data non-transmission period, and returns to an active mode in a data transmission period, the method comprising the steps of:
- receiving a control message designating at least one time slot on a forward wake-up channel, assigned to the mobile station in the control hold mode, from the base station during call setup for the data service, wherein the control message includes an information field for indicating the forward wake-up channel among a plurality of forward channels and an information field for indicating a position of the assigned slot on the forward wake-up channel,detecting at least one predetermined indicator bit over the time slot on the forward wake-up channel;
monitoring a control channel from the base station in order to determine whether to transit to the active mode if the at least one indicator bit indicates that the base station has data to transmit; and
returning to the active mode in order to receive data from the base station if a unique ID (Identification) of the mobile station is detected from the monitored control channel.
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Accused Products
Abstract
A mobile station in a control hold mode wakes up at a time slot on a wake-up channel received from a base station, assigned thereto, and detects at least one predetermined indicator bit. If the detected indicator bit indicates that the base station has data to transmit, the mobile station starts monitoring a forward packet data control channel from the base station, in order to determine whether to make a transition to an active mode. Otherwise, if the detected indicator bit indicates that the base station has no data to transmit, the mobile station maintains the control hold mode, thus preventing unnecessary power consumption.
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Citations
12 Claims
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1. A method for determining, by a mobile station, whether a base station has data to transmit during a data service, where the mobile station is in a control hold mode in a data non-transmission period, and returns to an active mode in a data transmission period, the method comprising the steps of:
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receiving a control message designating at least one time slot on a forward wake-up channel, assigned to the mobile station in the control hold mode, from the base station during call setup for the data service, wherein the control message includes an information field for indicating the forward wake-up channel among a plurality of forward channels and an information field for indicating a position of the assigned slot on the forward wake-up channel, detecting at least one predetermined indicator bit over the time slot on the forward wake-up channel; monitoring a control channel from the base station in order to determine whether to transit to the active mode if the at least one indicator bit indicates that the base station has data to transmit; and returning to the active mode in order to receive data from the base station if a unique ID (Identification) of the mobile station is detected from the monitored control channel. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for returning to an active mode to resume data transmission, by a base station in a control hold mode in a data non-transmission period where the base station transmits no data to a mobile station during a data service, the method comprising the steps of:
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transmitting a control message designating at least one time slot on a forward wake-up channel, assigned to the mobile station in the control hold mode, to the mobile station during call setup for the data service, wherein the control message includes an information field for indicating the forward wake-up channel among a plurality of forward channels and an information field for indicating a position of the assigned slot on the forward wake-up channel, setting at least one indicator bit on the forward wake-up channel, transmitted over the time slot, to a value indicating that the base station has data to transmit if there is data to transmit to the mobile station; and transmitting the indicator bit indicating that the base station has data to transmit, and then transmitting a unique ID (Identification) of the mobile station over a forward packet data control channel to the mobile station. - View Dependent Claims (9, 10, 11, 12)
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Specification