RAN procedures for extended discontinuous reception (DRX)

A method for discontinuous reception (DRX) operation at a user equipment (UE) in a wireless communication system, comprising:

• computing a frame index of a frame cycle utilized by legacy user equipments (UEs) for a first DRX mode;
• receiving a hyper frame index of a hyper frame cycle;
• determining a plurality of frames of an extended frame cycle based on the frame index and the hyper frame index, the extended frame cycle associated with an extended DRX cycle of a second DRX mode, wherein the extended DRX cycle is greater than a maximum DRX cycle available for the first DRX mode;
• determining a system information modification period based at least in part on the frame index;
• receiving a message indicating an update in system information, the message comprising an indication of a time period, different from the system information modification period, in which the UE is to acquire the updated system information, wherein the message is received before the indicated time period;
• and
• receiving the updated system information based at least in part on the indication.

An apparatus for discontinuous reception (DRX) operation in a wireless communication system, comprising:

• a processor;
• and
• a memory in electronic communication with the processor and instructions stored in the memory, the instructions being executable by the processor to:
• broadcast a frame index of a frame cycle utilized for a first DRX mode by at least one legacy user equipment (UE);
• broadcast a hyper frame index of a hyper frame cycle associated with an extended DRX cycle, each hyper frame cycle comprising a plurality of frame cycles and utilized for a second DRX mode by at least one non-legacy UE;
• determine a system information modification period based at least in part on the frame index;
• transmit a message indicating an update in system information, the message comprising an indication of a time period, different from the system information modification period, in which the at least one non-legacy UE is to acquire the updated system information, wherein the message is transmitted before the indicated time period;
• and
• transmit the updated system information based at least in part on the indication.

An apparatus for discontinuous reception (DRX) operation at a user equipment (UE) in a wireless communication system, comprising:

• a processor;
• and
• a memory in electronic communication with the processor and instructions stored in the memory, the instructions being executable by the processor to:
• compute a frame index of a frame cycle utilized by legacy user equipments (UEs) for a first DRX mode;
• receive a hyper frame index of a hyper frame cycle;
• determine a system information modification period based at least in part on the frame index;
• receive a message indicating an update in system information, the message comprising an indication of a time period, different from the system information modification period, in which the UE is to acquire the updated system information, wherein the message is received before the indicated time period;
• and
• receive the updated system information based at least in part on the indication.