RRC连接重建拒绝的原因有哪些？

截止到R11版本，RRCConnectionReestablishmentReject重建消息都不会给出原因值

RRCConnectionReestablishmentReject ::= SEQUENCE {
criticalExtensions CHOICE {
rrcConnectionReestablishmentReject-r8
RRCConnectionReestablishmentReject-r8-IEs,
criticalExtensionsFuture SEQUENCE {}
}
}
RRCConnectionReestablishmentReject-r8-IEs ::= SEQUENCE {
nonCriticalExtension RRCConnectionReestablishmentReject-v8a0-IEs OPTIONAL
}
RRCConnectionReestablishmentReject-v8a0-IEs ::= SEQUENCE {
lateNonCriticalExtension OCTET STRING OPTIONAL,
nonCriticalExtension SEQUENCE {} OPTIONAL
}