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1. (WO2015048361) DELAYED AND BUNDLED RETRANSMISSIONS FOR LOW BANDWIDTH APPLICATIONS

Pub. No.:    WO/2015/048361    International Application No.:    PCT/US2014/057567
Publication Date: Fri Apr 03 01:59:59 CEST 2015 International Filing Date: Sat Sep 27 01:59:59 CEST 2014
IPC: H04W 52/02
H04W 28/04
H04L 1/18
H04W 88/08
Applicants: APPLE INC.
Inventors: TABET, Tarik
MAJJIGI, Vinay R.
MUJTABA, Syed A.
MUCKE, Christian W.
Title: DELAYED AND BUNDLED RETRANSMISSIONS FOR LOW BANDWIDTH APPLICATIONS
Abstract:
Apparatus and methods are disclosed for performing delayed hybrid automatic repeat request (HARQ) communications in the downlink (DL) to reduce power consumption for a user equipment (UE) during a connected mode discontinuous reception (C-DRX) cycle. An enhanced NodeB can be configured to monitor a physical uplink control channel (PUCCH) for DL HARQ information to determine when the PUCCH contains a negative acknowledgement (NACK) message, and in response to determining that the PUCCH contains a NACK message, the eNodeB can wait until a next C DRX ON duration to transmit a HARQ DL retransmission. The eNodeB can also determine whether or not to bundle the HARQ DL retransmission in consecutive transmission time intervals, based on a signal to interference plus noise ratio (SINR) associated with the UE.