US 9,882,700 B2 · Systems and methods for backoff procedures for licensed-assisted access

Abstract

An evolved NodeB (eNB) is described. The eNB includes a processor and memory in electronic communication with the processor. Instructions stored in the memory are executable to maintain a contention window size. The instructions are also executable to increase the contention window size according to hybrid automatic request acknowledgement/negative acknowledgment (HARQ-ACK) value(s) corresponding to physical downlink shared channel (PDSCH) transmission(s) in a first subframe. The first subframe is a starting subframe of a previous downlink transmission burst on a licensed-assisted access (LAA) carrier for which HARQ-ACK has been fed back.

Claims6

Dependent claims

An evolved NodeB (eNB), comprising:

a processor;
and
a memory in electronic communication with the processor, wherein instructions stored in the memory are executable to:
maintain a contention window size;
and
increase the contention window size according to hybrid automatic request acknowledgement/negative acknowledgment (HARQ-ACK) value(s) corresponding to physical downlink shared channel (PDSCH) transmission(s) in a first subframe, wherein the contention
window size is increased if an amount of the HARQ-ACK value(s) determined as negative acknowledgment (NACK) is greater than or equal to a pre-determined percentage, and wherein
the first subframe is a starting subframe of a previous downlink transmission burst on a licensed-assisted access (LAA) carrier for which HARQ-ACK has been fed back.

5 more elements

Dependencies are inferred from the claim text.

Facts

Application

15/195,855Filed 28 Jun 2016 · us provisional application

Priority

30 Jun 2015

Published

US 2017/0005768 A15 Jan 2017

Granted

30 Jan 2018

Term ends

Not estimatedThe source records don’t support an estimate.

Classification12 codes

H04L 5/0055
Allocation of signalling, i.e. of overhead other than pilot signals: physical resource allocation for ACK/NACK
H04L 1/1825
Automatic repetition systems, e.g. Van Duuren systems: adaptation of specific ARQ protocol parameters according to transmission conditions
H04L 1/1867
Automatic repetition systems, e.g. Van Duuren systems: arrangements specially adapted for the transmitter end
H04L 47/27
Flow control; Congestion control: evaluation or update of window size, e.g. using information derived from acknowledged [ACK] packets

Systems and methods for backoff procedures for licensed-assisted access

Life of this patent

Systems and methods for backoff procedures for licensed-assisted access

Life of this patent

Abstract

Claims6