Unlock instant, AI-driven research and patent intelligence for your innovation.

Hybrid automatic repeat request (h-arq) for a wireless local area network

A retransmission and wireless device technology, applied in the field of hybrid automatic retransmission request mechanism, can solve the problem of not being able to get confirmation

Active Publication Date: 2017-01-04
APPLE INC
View PDF5 Cites 20 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The currently proposed 802.11ax Wi-Fi packet structure includes a field for the packet that identifies the receiving station the packet is intended to be addressed to but does not indicate the address of the sending station where the packet originated. Instead, the sending address and receiving address and retransmission bits are included in the Medium Access Control (MAC) header, which cannot be acknowledged until the MAC header and payload are decoded and the Frame Check Sequence (FCS) accompanying the MAC header and payload combination is checked

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Hybrid automatic repeat request (h-arq) for a wireless local area network
  • Hybrid automatic repeat request (h-arq) for a wireless local area network
  • Hybrid automatic repeat request (h-arq) for a wireless local area network

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] Representative applications of systems, methods, apparatus, and computer program products according to the present disclosure are described in this section. These examples are provided only to add context and to aid understanding of the described embodiments. It will thus be apparent to those skilled in the art that the described embodiments can be practiced without some or all of these specific details. In other instances, well known process steps have not been described in detail to avoid unnecessarily obscuring the described embodiments. Other applications are possible such that the following examples should not be construed as limiting.

[0023] In the following detailed description, reference is made to the accompanying drawings, which form a part hereof and in which are shown by way of illustration certain embodiments in accordance with the described embodiments. While these embodiments are described in sufficient detail to enable those skilled in the art to pra...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

Apparatus and methods for a hybrid automatic repeat request (H-ARQ) mechanism for wireless communication devices of a wireless local area network (WLAN) are disclosed. Methods and apparatus to determine whether a packet is an original, first transmission or a retransmission of a previously transmitted packet without decoding the payload of the packet are disclosed. Medium access control (MAC) addresses of a transmitter, such as an access point (AP), and a receiver, such as a station (STA), of a WLAN are encoded separately with a retransmission bit to indicate whether the packet is retransmitted. For an aggregated MAC protocol data unit (A-MPDU), a sequence number is included to determine which MAC protocol data units (MPDUs) of the A-MPDU are retransmitted. When retransmission is indicated, the receiver of the STA performs a hybrid automatic repeat request (H-ARQ) process to combine the retransmitted packet with previously received packets.

Description

technical field [0001] The described embodiments relate generally to wireless communications, including methods and apparatus for a hybrid automatic repeat request (H-ARQ) mechanism for devices on a wireless local area network (WLAN). Background technique [0002] A station (STA) on a WLAN shares an operating channel used by an access point (AP) of the WLAN with other stations. In current WLANs, packets are not identified as retransmitted packets, and retransmitted packets contain aggregated packets that can include a mix of the original first-sent packet and the retransmitted packet aggregated together inside. In order to determine that a data packet is addressed to a particular station and not another station sharing the same WLAN, the particular station must decode the payload of the data packet. The currently proposed 802.11ax Wi-Fi packet structure includes a field for the packet that identifies the receiving station the packet is intended to be addressed to but does ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/18H04L45/74
CPCH04L1/1812H04L1/0061H04L1/1819H04L1/1845H04L1/0083H04L1/1816H04L45/74H04W84/12
Inventor J·金姆金柳哲S·A·姆塔巴
Owner APPLE INC