Scheduling for orthogonal frequency division multiple access (OFDMA) transmissions in a wireless local area network (WLAN)

An orthogonal frequency division multiple access, wireless local area network technology, applied in the field of network communication

Inactive Publication Date: 2016-08-10
STMICROELECTRONICS SRL
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, extending OFDMA to WLAN is a challenge because WLAN is a well-established and regulated technology (see for example the standardized implementation in IEEE802.11)

Method used

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  • Scheduling for orthogonal frequency division multiple access (OFDMA) transmissions in a wireless local area network (WLAN)
  • Scheduling for orthogonal frequency division multiple access (OFDMA) transmissions in a wireless local area network (WLAN)
  • Scheduling for orthogonal frequency division multiple access (OFDMA) transmissions in a wireless local area network (WLAN)

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Embodiment Construction

[0019] The making and using of the embodiments are discussed in detail below. It should be appreciated, however, that the present disclosure provides many applicable inventive concepts that can be embodied in a wide variety of specific contexts. The specific embodiments discussed are merely illustrative of specific ways to make and use the invention, and do not limit the scope of the invention.

[0020] now refer to figure 1 , figure 1 A wireless local area network (WLAN) basic service set (BSS) including an access point (AP) and a plurality of client stations (STAs) is illustrated. An AP is a communication device that allows STAs to access and communicate using a WLAN. Examples of STAs include, but are not limited to, smartphones, computers, laptops, e-readers, watches, sensors, or other wireless devices.

[0021] APs and STAs communicate with each other through multiple sub-channels, where each sub-channel is formed by a set of sub-carriers. The total number of suppor...

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Abstract

The application relates to scheduling for orthogonal frequency division multiple access (OFDMA) transmissions in a wireless local area network (WLAN). An access point (AP) contends for a medium during a contention period in order to obtain exclusive control of the medium for a certain time period that may include one or more transmission opportunities. The AP and client stations (STAs) communicate during the time period using orthogonal frequency division multiple access (OFDMA) techniques with scheduled use (i.e., allocation) of sub-channels of the medium. The AP controls this scheduling for down-link and up-link communications by sending control signaling to inform the STAs of the resource allocation schedule which specifies STAs involved in the OFDMA communications along with the sub-channel identification bandwidth allocated to each STA. The control signaling may be a combination of physical layer (PHY) and medium access control layer (MAC) communicated information.

Description

[0001] Cross References to Related Applications [0002] This application claims priority to US Provisional Patent Application No. 62 / 111,177, filed February 3, 2015, the disclosure of which is incorporated by reference. technical field [0003] The present invention relates generally to network communications, and in particular to methods and apparatus for communicating in wireless local area networks (WLANs) using Orthogonal Frequency Division Multiple Access (OFDMA) techniques. Background technique [0004] Those skilled in the art will appreciate that wireless local area networks (WLANs) typically use Orthogonal Frequency Division Multiple Access (OFDMA) for communications between an access point (AP) and one or more client stations (STAs). OFDM is a transmission format in which all transmission resources are allocated to a single STA at a time. An AP or STA wins access to the medium using contention access techniques such as Carrier Sense Multiple Access with Collisio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L5/00H04W72/04H04W72/12
CPCH04L5/0007H04L5/003H04W72/044H04W72/12H04W72/121H04W74/0816H04W84/12H04L5/0037H04L1/1854H04L1/1607H04W72/23H04L1/16H04W72/04
Inventor 楮立文G·A·弗兰蒂斯
Owner STMICROELECTRONICS SRL
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