Verizon says LTE outages are IMS related

Recent multiple outages on the new Verizon Long Term Evolution network were caused by software bugs in the IMS core, according to Verizon Wireless VP of network engineering Mike Haberman. Verizon says IMS is culprit behind LTE outages

All three outages were caused by problems in Verizon’s service delivery core, the IP Multimedia Subsystem (IMS) which is used for signaling on the LTE network.

While IMS has been around for some time, Verizon’s is the first implementation in an LTE network and it has continued to be a problem spot ever since April 2011, when a software bug originating deep within the IMS core led to a complete failure, kicking LTE customers off both Verizon’s 3G and 4G networks nationwide.