This article reviews law enforcement/national security access and use of metadata, considering the privacy impact of the revised metadata retention and collection framework introduced in 2015. The review reveals that, after 2015, no comprehensive study was undertaken in the following areas: how location information is generated and exchanged in the IP-mediated LTE network, and how mobile devices are tracked and create more precise location estimates, in the legal and policy context of the exceptions and privacy safeguards introduced after 2015; the discretionary powers of the agencies to use personal and sensitive information to identify inquiries and investigations to pursue and enforce the law.

Centralized mobility management (CMM) is widely used in current mobile network technologies. One problem related to CMM is a single point of failure. In this paper, we propose a distributed mobility management (DMM) solution with handover operations for SDN-enabled mobile networks.

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