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Efficient detection of general paging messages in poor signal to noise environments
| Details |
Inventors: Bayley, Gwain;
Assignee: Qualcomm Incorporated (San Diego, CA)
Primary Examiner: Le; Thanh Cong
Assistant Examiner: Corsaro; Nick
Attorney, Agent or Firm: Wadsworth; Philip, Brown; Charles D., Seo; Howard
A method of and an apparatus for reducing the average power consumption in a remote unit in a wireless communication system. When a remote unit in a slotted mode communication system enters an active state, it receives a sequence of messages. One element of this sequence is a general paging message that command the remote unit to return to the inactive state immediately, thus conserving battery power. The general paging message is followed by several additional elements in the sequence. When the remote unit operates in a poor signal-to-noise ratio environment, for example, it may not receive the general paging message and may, thus, unnecessarily remain in the active state until the end of its assigned slot, wasting battery power. The invention determines whether the element received by the remote unit is a general paging message. If so, the remote unit enters the inactive mode. If not, the invention determines whether the element occurs after a general paging message in the sequence of messages. If so, the remote unit enters the inactive mode without waiting for the end of the assigned slot. |
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DETAILED DESCRIPTION The invention is directed to methods of and an apparatus for detecting general paging messages.
In an aspect of the present invention, the invention can be used for reducing the average power consumption of a remote unit even in a poor signal-to-noise ratio environment.
In a slotted mode communication system, a remote unit will alternate between active and inactive states.
When the remote unit is in its active state it monitors the wireless channel and receives messages from a base station.
At the completion of its active state, either when commanded by the base station or reaching the end of its assigned slot, the remote unit enters an inactive state.
During the inactive state the remote unit reduces power consumption by removing power from selected circuitry, such as, for example, circuitry used to monitor the wireless channel.
A method of processing base station signals by a remote unit according to one aspect of the present invention includes transmitting a sequence of messages from a base station; receiving an element of the sequence by the remote unit; determining whether the element is a general paging message; and, if the element is not a general paging message, further determining whether the element occurs after a general paging message in the sequence.
According to another aspect of the invention, the method further includes transitioning the remote unit to an inactive mode when the element is a general paging message.
According to yet another aspect of the invention, the method further includes transitioning the remote unit to an inactive mode when the element occurs after a general paging message in the sequence.
A remote unit according to an aspect of the invention includes a receiver configured to receive an element of a sequence of messages transmitted by a base station; and a controller configured to determine whether the element is a general paging message and further configured to determine, when the element is not a general paging message, whether the element occurs after a general paging message in the sequence
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