By Samuel C. Yang
CDMA2000 is of serious curiosity to instant communications pros simply because this 3G (third new release) ordinary presents for quicker information premiums, always-on info provider, and more desirable voice community ability. Breaking down complicated know-how into easy-to-understand suggestions, this hands-on, system-level source deals RF (radio frequency) and instant process engineers professional tips in designing, optimizing, and working a CDMA2000 instant community.
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Extra resources for 3G CDMA2000 Wireless System Engineering
1 shows the categorization of these forward link channels, both signaling and user. 1 is a list of physical channels used by the physical layer. Both forward link and reverse link channels and their descriptions are shown for completeness. Also, for each forward link physical channel, its counterparts on the reverse link are shown in the same row for correspondence. Asterisked channel designations show those channels that also exist in IS-95 systems. Note that (forward and reverse) fundamental channels are equivalent to the IS-95 traffic channels.
3 shows in more detail how the F-QPCH works in conjunction with the F-PCH. As one can see in the figure, a paging channel slot and a quick paging channel slot both last 80 ms, and quick paging channel slots are offset from (ahead of) paging channel slots by 20 ms. Each quick paging channel is divided into four 20-ms portions. In this case, let’s assume that a mobile’s assigned paging channel slot is slot Y. 3 Channel format: F-QPCH. As an example, the figure shows two paging indicators located in the second and fourth 20-ms portions of the quick paging channel slot (y).
If the paging indicators show that there is a mobile-specific page coming in, then the mobile wakes up and monitors its assigned paging channel slot. Note that in this regard, the F-QPCH works with a paging channel operating in slotted mode. In addition, the F-QPCH can also work with a forward common control channel operating in slotted mode. 3 shows in more detail how the F-QPCH works in conjunction with the F-PCH. As one can see in the figure, a paging channel slot and a quick paging channel slot both last 80 ms, and quick paging channel slots are offset from (ahead of) paging channel slots by 20 ms.