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Thread: What is Quick Paging Channel?

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    What is Quick Paging Channel?

    Can anyone explain What is Quick Paging Channel?

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    Mobile monitors incoming calls on paging channel. The mobile station continuously monitors the Paging Channel on both slotted and non slotted mode. The mobile station can “sleep” or reduce power consumption (for the power conservation) during non-active states (during the slots when the paging channel is not being monitored).
    Since battery consumption is high in paging channel mode so QPCH channel (quick paging channel) is introduce to save battery of mobile. Mobile monitors QPCH to determine if there is a paging forthcoming on paging channel in its slot (looks at 1-bit paging indicator). If no flag, then mobile continues to sleep; if have flag, the mobile monitor appropriate slot and decodes general page message
    Without QPCH, mobile must monitor regular paging channel slot and decode several fields to determine whether page is for it or not; this drains mobile batteries quickly.


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    The Quick Paging Channel (QPCH) is one of the new forward link common channels introduced in the IS-2000 standard. The QPCH improves slotted mode operation of the mobile station, thus increasing standby time. In an IS-95 system, a mobile station operating in the slotted mode wakes up for an entire slot cycle during its assigned slot. With the use of QPCH, a mobile station only needs to wake up long enough to demodulate one or two QPCH bits, which indicates whether a page is present in the following slot cycle. This minimizes the time the RF components are kept active, thus improving the battery life of the mobile station.


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