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STA initiated uplink aggregation in wireless communication systems

專利號(hào)
US10091813B2
公開日期
2018-10-02
申請(qǐng)人
MEDIATEK INC.（TW HsinChu）
發(fā)明人
James June-Ming Wang; Ching-Hwa Yu; Yuh-Ren Jauh; Chih-Shi Yee
IPC分類
H04W74/00; H04W74/08; H04W72/04; H04W56/00; H04W74/06; H04W72/12; H04W84/12
技術(shù)領(lǐng)域
txop,uplink,ap,ul,sta1,sta,ofdma,ack,stas,ppdu
地域： Hsinchu

摘要

A method of STA-initiated uplink (UL) aggregation is proposed in a wireless communication system. Under the STA-initiated UL aggregation, an STA can gain access to the medium through contention and after winning the TXOP, it passes the TXOP ownership to its AP to allow it to trigger UL MU transmission. Thus, the AP has increased chance of utilizing the medium while maintains fairness to both legacy APs and STAs. In addition, once AP takes over ownership of the TXOP, if it detects idle secondary channels, it can enable UL aggregation over the idle secondary channels, thereby fully utilizing the entire system bandwidth.

說(shuō)明書

In one embodiment, an access point (AP) receives a first uplink transmission from a first wireless station (STA) in a wideband wireless communication network. The first uplink transmission indicates handing over a reserved transmission opportunity (TXOP) ownership of at least a primary channel. The AP transmits a trigger or trigger+ACK frame to a plurality of STAs over multiple sub-bands of the wideband. The AP indicates an uplink OFDMA/MU-MIMO transmission over the multiple sub-bands for the plurality of STAs sharing the same TXOP. Each trigger frame serves as synchronizing the uplink transmission timing and packet transmit time, and for allocating uplink resources to the plurality of STAB.

Other embodiments and advantages are described in the detailed description below. This summary does not purport to define the invention. The invention is defined by the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 illustrates a wireless communications network with STA-initiated uplink aggregation in accordance with one novel aspect.

FIG. 2 is a simplified block diagram of a wireless transmitting device and a wireless receiving device in accordance with one novel aspect.

FIG. 3 illustrates one example of an uplink OFDMA transmission that is initiated by an STA. The STA only transmits over the primary channel. The AP initiates and controls UL OFDMA over detected idle secondary channels using modified ACK/BA frames.

權(quán)利要求

1
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