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Delayed and bundled retransmissions for low bandwidth applications

A hybrid automatic retransmission, transport block technique, applied in the process domain of the problem

Active Publication Date: 2016-05-11
APPLE INC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the power-saving benefits of C-DRX and SPS operation may be affected by superimposing HARQ retransmissions on top of it, which requires the UE to stay awake for a longer period of time to enable the UE to transmit / receive HARQ acknowledgments (ACK / NACK) message, and then process the corresponding DL or ULHARQ retransmission

Method used

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  • Delayed and bundled retransmissions for low bandwidth applications
  • Delayed and bundled retransmissions for low bandwidth applications
  • Delayed and bundled retransmissions for low bandwidth applications

Examples

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Embodiment Construction

[0033]Described within this section are methods for scheduling and implementing improved LTE downlink (DL) and LTE uplink (UL) hybrid automatic repeat request (HARQ) retransmissions for performing reduced HARQ operations in DL respectively And a representative example of performing reduced HARQ operations in UL. Additionally, various examples for performing DL and UL HARQ bundled retransmissions are described herein. These examples are provided to add context to and facilitate understanding of the disclosed subject matter. It will be apparent to one of ordinary skill in the art that the present disclosure may be practiced with or without some of the specific details described herein. In addition, various modifications and / or changes may be made to the subject matter described herein and shown in the corresponding drawings to achieve a like advantage and result without departing from the spirit and scope of the present disclosure.

[0034] This section refers to the accompany...

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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.

Description

technical field [0001] The described embodiments relate generally to wireless communications, and more specifically to procedures for mitigating problems associated with hybrid automatic repeat request (HARQ) scheduling that results in unnecessary power consumption at user equipment. Background technique [0002] Fourth-generation (4G) cellular networks using newer Radio Access Technology (RAT) systems that implement 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) and Advanced LTE (LTE-A) standard. LTE-A brings about the aggregation of multiple component carriers (CCs) to enable this wireless communication standard to meet the bandwidth requirements of multi-carrier systems that progressively achieve data rates not achievable by previous LTE releases. [0003] One mechanism common to LTE and LTE-A that allows these 4G telecom standards to reliably achieve high data rate throughput is Hybrid Automatic Repeat Request (Hybrid ARQ or HARQ). The LTE HARQ pro...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W52/02H04W28/04H04L1/18H04W88/08
CPCH04L1/1825H04W52/0222H04L1/1887H04L1/1812H04W76/28Y02D30/70H04L1/1671H04L1/1854H04L1/1864
Inventor T·塔贝特V·R·马伊吉S·A·姆塔巴C·W·马科
Owner APPLE INC
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