me, each entry in the ADP An a in the list represents list defines the maximum time delay before an UE probability in percentages and a b can access the random access channel with a specific represents the delay in ms. success percentage. If ADPx's a is larger than that of This target is suitable for RACH Optimization (RO) ADPy, then ADPx's b also has to be larger than the b of ADPy. (continued) CHAPTER 2 SELF-ORGANIZING NETWORKS IN LTE DEPLOYMENT Table 2-1. (continued) Target Name Definition Legal Values RachOptAccess This defines the list of Access Probability (APn) that is APn's are listed as a pair (a, n). Probability acceptable. An a in the list represents Each instance of APn of the list is the probability that probability in percentages and the UE gets access on the RACH within n number of n represents the number of attempts over an unspecified sampling period. attempts. For a sampling period, each entry in the APn list If APx's a is larger than that of APy, defines the probability of an UE to be able to access the then APx's n has to be also larger RACH within n attempts. than n of APy. This target is suitable for RO. roSwitch Indicates if the RACH optimization feature is activated On, off or deactivated. The parameters presented in Table 2-2 are broadcasted by a base station under SIB2 that corresponds to the PRACH characteristics. Table 2-2. PRACH Configuration Elements ASN1START PRACH-ConfigSIB ::= SEOUENCE { rootSequenceIndex INTEGER (0..837), prach-ConfigInfo PRACH-CinfigInfo PRACH-Config ::= SEQUENCE { OPTIONAL Need ON rootSequenceIndex INTEGER (0..837), prach-ConfigInfo PRACH-CinfigInfo PRACH-ConfigInfo := SEQUENCE { prach-ConfigIndex INTEGER (0..63) highSpeedFlag BOOLEAN, zeroCorrelationZoneConfig INTEGER (0..15) prach-FreqOffset INTEGER (0..94) Prach-Configlndex The parameter Prach-ConfigIndex provides the information about random access opportunities that are available in a particular sector of the UE. There are 64 possible values that a Prach-ConfigIndex can assume, and each value provides info