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S:\HP83206A\USRGUIDE\MANUAL\is136bas.fm
Chapter 10, TIA/EIA-136 Basics
Basic Functions of the DCCH in TIA/EIA-136
The basic steps in initialization are described below.
DCCH
Initialization Tasks
DCCH Scanning and Locking
When checking control channels for the strongest one, a mobile may scan all
channels. However, in the TIA/EIA-136 system, the DCCHs are scanned in
blocks. This is done to shorten the time required to find a control channel.
The entire set of channels for a system is divided into 16 blocks, called probability
blocks. Each block is assigned a relative probability for the likelihood of
providing DCCH support. Service providers assign these probability blocks.
The mobile station will typically store the prioritized list of probability blocks for
its home system. The mobile will search each block’s channels in ascending order.
After communication has been established with a service provider, a ‘neighbor
list’ may be provided. This list contains information about the DCCHs that are
available in neighboring cells. This list is used by the mobile when searching
probability blocks for a new DCCH.
The candidate DCCH is selected in this step.
Power On
Select preferred system (A or B)
Mobile chooses whether to search for a DCCH or an ACC
DCCH ACC
DCCH Scanning and Locking Start Initialization Task
Select Digital Control Channel Scan Primary Set of Dedicated
Control Channels
Determine Signal Strength
Aspects
Update Digital Overhead
Information
Determine Service Aspects Primary Paging Channel
Selection
Verify Overhead Channel
Information
Enter DCCH Camping state Enter Idle state