Cdma PRL和ERI

ERI Extended Roaming Indicators
PRL Preferred Roaming List

PRL is a set of RF channels on which to search for service and the description of systems that can be found on those channels.
Or
PRL is a list of mobile network systems that a mobile device is allowed to access and the frequencies on which they can be found.

With PRL, the operator is able to specify whether a “Roam” condition is to be indicated on mobile’s display.
With ERI, a richer set of indicators can be selected for display.

The TIA/EIA Spread Spectrum Standards support the concept of Ehanced Roaming Indicator(ERI) on the
control channels. Enhanced Roaming Indicator allows the network to indicate to the subscriber the roaming
condition of the mobile station. Each Enhanced Roaming Indicator is identified by a unique roaming display
number to facilitate proper processing within the network and mobile stations. Please refer to C.R1001 for
the number assignments of the Enhanced Roaming Indicator(ERI)

copy it from C.R1001

Roaming Display Number(Binary)     Enhanced Roaming Indicator

00000000                                   Roaming Indicator On
00000001                                   Roaming Indicator Off
00000010                                   Roaming Indicator Flashing
00000011                                   Out of Neighborhood
00000100                                   Out of Building
00000101                                   Roaming - Preferred System
00000110                                   Roaming - Available System
00000111                                   Roaming - Alliance Partner
00001000                                   Roaming - Premium Partner
00001001                                   Roaming - Full Service Functionality
00001010                                   Roaming - Partial Service Functionality
00001011                                   Roaming Banner On
00001100                                   Roaming Banner Off
00001101
through
00111111                                  Reserved for Standard Enhanced Roaming Indicator Numbers
01000000
through
01111111                                  Reserved for Non-Standard Enhanced Roaming Indicator Numbers
10000000
through
11111111                                  Reserved

PRL是指优先选择的一个漫游列表，是一个信道列表；
ERI只是漫游时的一个图标指示吧，只一个UI上的显示，和PRL应该没什么大关系。。