ndication Network Address and Port Translation NAPT-PT NAPT Protocol Translation Non Access Stratum Narrow Band Notify-Answer Notify-Request Outgoing Communication Barring Online Charging System Offline Charging System Orthogonal Frequency-Division Multiplexing OFDMA Orthogonal Frequency-Division Multiple Access Originating Identification Presentation Originating Identification Restriction Optimal Media Routeing OTDOA Observed Time Difference of Arrival List of Abbreviations xxiii Physical Broadcast Channel Policy and Charging Control Paging Control Channel Policy and Charging Enforcement Function PCFICH Physical Control Format Indicator Channel Paging Channel Physical-layer Cell Identity Policy Charging and Rules Function P-CSCF Proxy-CSCF PDCCH Physical Downlink Control Channel Packet Data Convergence Protocol Packet Data Network PDSCH Physical Downlink Shared Channel PDN Gateway PHICH Physical HARQ Indicator Channel Power Headroom Report Public Land Mobile Network Physical Multicast Channel Precoding Matrix Indicator Push-Notification-Answer Push-Notification-Request Push-Profile-Answer Push-Profile-Request PRACH Physical Random Access Channel Positioning Reference Signal Packet-Switched Public Safety Answering Point Public Service Identity VoLTE and ViLTE Primary Synchronization Signal Public Switched Telephone Network PUCCH Physical Uplink Control Channel Profile-Update-Answer Profile-Update-Request PUSCH Physical Uplink Shared Channel Quadrature Amplitude Modulation QoS Class Identifier Quality of Service Quadrature Phase-Shift Keying Re-Auth-Answer Random Access Channel Random Access Response Re-Auth-Request RA-RNTI Random Access RNTI Radio Access Technology Resource Block Resource Element Release Request For Comments Rank Indicator Radio Link Control Release Complete Radio Network Controller Radio Network Temporary Identity List of Abbreviations Relative Narrowband Tx Power Robust Header Compression Radio Resource Control Reference Signal Reset-Answer Reset-Request Reference Signal Received Power Referenc