Patent ID: 9628588
Date: 2017-04-18
CPC Classifications: H04L,H04W

Claim:
1. A method in a radio network controller for transmitting data to a user equipment in a wireless communication system, which radio network controller is communicating over a Radio Link Control layer with the user equipment, said method comprising: assigning an extended sequence number to a packet data unit to be transmitted to the user equipment, said extended sequence number having an extended number space and comprising a first number of bits representing a sequence number in a smaller number space, and further comprising a second number of bits representing a sequence number extension that extends the sequence number into the extended number space; generating the packet data unit comprising a header with a first field of bits conveying the sequence number of the packet data unit, a third field of bits comprising the sequence number extension, and a second field of one or more bits indicating that a third field of the header comprises the sequence number extension; and transmitting the packet data unit to the user equipment.