Patent ID: 8811617
Filing Date: 2014-08-19
Classification: H04W

Abstract:
1. A method for transmitting a signal by a transmitter to a receiver over a radio frequency (RF) channel, the method comprising: multiplexing, by the transmitter, a plurality of service data units (SDUs) to form a unit signal, the plurality of SDUs having a same priority and being mapped to a radio bearer (RB), wherein the plurality of SDUs are user data; ciphering, by the transmitter, the unit signal using a mask to generate a ciphered unit signal, the mask generated by a first parameter combination that includes a plurality of ciphering parameters, the plurality of ciphering parameters including a ciphering key (CK), a count value, a radio bearer identifier (RB ID) corresponding to the multiplexed SDU, and a length of the mask; and transmitting, by the transmitter, the ciphered unit signal to the receiver over the RF channel.