In the past decade, the security of cellular networks has been increasingly under scrutiny,
leading to the discovery of numerous vulnerabilities that expose the network and its users to …

Smartphones have become increasingly prevalent and important in our daily lives. To meet
users' expectations about the Quality of Experience (QoE) of mobile applications (apps), it is …

VoLTE (Voice-over-LTE) is the designated voice solution to the LTE mobile network, and its
worldwide deployment is underway. It reshapes call services from the traditional circuit …

Long Term Evolution (LTE) is becoming the dominant cellular networking technology,
shifting the cellular network away from its circuit-switched legacy towards a packet-switched …

Smartphone users do not fully know what their apps do. For example, an applications'
network usage and underlying security configuration is invisible to users. In this paper we …

Control-plane protocols are complex in cellular networks. They communicate with one
another along three dimensions of cross layers, cross (circuit-switched and packet-switched) …

Recently, the performance of mobile data networks has been evaluated from many aspects,
eg, TCP/IP protocols, comparison with WiFi or even satellite communication, under different …

Exploiting multi-carrier access offers a promising direction to boost access quality in mobile
networks. However, our experiments show that, the current practice does not achieve the full …

Secure mobile data charging (MDC) is critical to cellular network operations. It must charge
the right user for the right volume that (s) he authorizes to consume (ie, requirements of …

Packet retransmission is a fundamental TCP mechanism that ensures reliable data transfer
between two end nodes. Interestingly, when it comes to cellular data accounting, TCP …