iDEN PACKET DATA RECONNECTION AND LAPi
Original Publication Date: 1998-Mar-01
Included in the Prior Art Database: 2002-Jun-28
iDEN Packet Data has defined the Link Access Protocol-iDEN (LAPi) for reliable wireless data transmissions. Also, a MS can change cells during data tranimission or reception due to poor RF conditions. If the MS is in the middle of trans- mitting data to the system when it changes cells, LAPi requires the MS to wait until the system informs the MS what pieces of the data it did not receive from the MS before the MS can transmit the remaining data. This is inefficient as (I) the MS knows where it left off transmitting data to the system; (2) the acknowledgment is likely to be sent to the old cell and the MS will have to wait even longer to timeout and resend the entire PDU; and (3) retry PDUs are sent at a lower modulation rate to increase the likelihood of reception.