534 Chapter 5—Mobile IPv6
unsolicited Mobile Prefix Advertisement message. When the last condition occurs, a home
agent may send the message. A mobile node updates its prefix information and home
addresses derived from updated prefixes when it receives this unsolicited Mobile Prefix
Advertisement.
When sending an advertisement message, a home agent must follow the following schedul-
ing algorithm to avoid network congestion:
• If a mobile node sends a solicitation message, a home agent sends an advertisement
message immediately.
• Otherwise, a home agent schedules the next transmission time as follows:
MaxScheduleDelay = MIN(MaxMobPfxAdvInterval, preferred lifetime)
RandomDelay = MinMobPfxAdvInterval
+(RANDOM() %
ABS(MaxScheduleDelay − MinMobPfxAdvInterval ...