A quick paging channel (QPCH) is used to receive paging indicators that indicate that a wireless communication device (WCD) has a message on a paging channel relating to, for example, an incoming call to the WCD. When the condition of the quick paging channel is too low to receive paging indicators reliably,...http://www.google.fr/patents/US6650912?utm_source=gb-gplus-shareBrevet US6650912 - Selecting paging channel mode
