公开(公告)号：US10128921B2

公开(公告)日：2018-11-13

申请号：US15499730

申请日：2017-04-27

Applicant: MEDIATEK INC.

Inventor： James June-Ming Wang ,  Jianhan Liu

IPC: H04B7/0452 ,  H04B7/06

Abstract: System and method of Multi-User Multiple-Input Multiple-Output (MU-MIMO) Beamforming communication. An MU-MIMO BF training session is used to train all the responders in a user group in relation to an initiator having multiple antenna arrays. Accordingly, suitable TX-RX sector pairs are selected based on the training results, and the user group is arranged into subsets such that the initiator can transmit data to the responders in one subset simultaneously by using mutually orthogonal BF waveforms. Prior to the MU-MIMO BF training session, the initiator can select TX sectors of the TX antennas and responders for the training session based on results from a prior or preliminary SISO BF training.

公开(公告)号：US10051588B2

公开(公告)日：2018-08-14

申请号：US14952966

申请日：2015-11-26

Applicant: MEDIATEK INC.

Inventor： James June-Ming Wang ,  Yuh-Ren Jauh ,  Ching-Hwa Yu ,  Chih-Shi Yee ,  Yasantha N. Rajakarunanayake ,  Tianyu Wu

IPC: H04W56/00 ,  H04W72/04 ,  H04W72/08 ,  H04W84/12

Abstract: A method of mitigating inter-BSS interference via synchronized inter-BSS operation is proposed. By aligning the transmission of UL and DL transmission in two overlapping OBSSs, the inter-BSS STA-to-STA and inter-BSS AP-to-AP types of interference can be eliminated. Furthermore, based on the BSS overlapping geometry and the STA location, different interference mitigation schemes can be applied to mitigate inter-BSS AP-to-STA and inter-BSS STA-to-AP types of interference.

公开(公告)号：US09749967B2

公开(公告)日：2017-08-29

申请号：US15257074

申请日：2016-09-06

Applicant: MEDIATEK INC.

Inventor： James June-Ming Wang ,  Jianhan Liu ,  Chao-Chun Wang ,  YungPing Hsu

IPC: H04W52/24 ,  H04W52/50 ,  H04B17/345 ,  H04W16/02 ,  H04W74/08 ,  H04W52/14 ,  H04W84/12

CPC classification number: H04W52/243 ,  H04B17/345 ,  H04W16/02 ,  H04W52/146 ,  H04W52/241 ,  H04W52/242 ,  H04W52/245 ,  H04W52/247 ,  H04W52/50 ,  H04W74/0816 ,  H04W84/12

Abstract: A method of spatial reuse with opportunistic transmit power control (TPC) and clear channel assessment (CCA) is proposed. In the opportunistic TPC and CCA, a spatial reuse station (SR-STA) gains enough knowledge in certain situation for more aggressive spatial reuse such that its transmit power may be adjusted to meet the spatial reuse conditions based on the received OBSS PPDU and the corresponding spatial reuse parameter (SRP). Both Type 1 SRP and Type 2 SRP are defined. In one example, the Type 1 or Type 2 SRP is a 5-bit parameter carried in the HE-SIG-A field of the OBSS PPDU, which can be a trigger frame, a response frame, a request-to-send (RTS)/clear-to-send (CTS) frame, and a data frame.

公开(公告)号：US09565516B2

公开(公告)日：2017-02-07

申请号：US14848108

申请日：2015-09-08

Applicant: MEDIATEK INC.

Inventor： James June-Ming Wang ,  Kai-Chun Chou ,  Li-Chun Ko ,  Ching-Hwa Yu ,  YungPing Hsu ,  Chih-Shi Yee

IPC: H04W4/00 ,  H04W28/22 ,  H04W28/02 ,  H04L12/825

CPC classification number: H04W4/008 ,  H04L47/26 ,  H04W4/80 ,  H04W28/0236 ,  H04W28/22

Abstract: A method of fast link adaptation for Bluetooth long-range wireless networks is provided. A novel rate indication (RI) field is incorporated in a data packet to enable auto detection of rate adaptation at the receiver side. The data packet comprises a preamble, a first packet portion including the RI field, and a second packet portion including the PDU. The first packet portion is encoded with a first rate while the second packet portion is encoded with a second rate indicated by the RI field. The transmitting device raise/lower the encoding rate when the link quality is good/poor. The receiving device can provide recommended rate or link quality feedback information via an LMP message to help the transmitting device making rate adaptation decision. The transmitter can unilaterally decide the data rate for the second packet portion without receiver recommendation.

Abstract translation: 提供了一种用于蓝牙远程无线网络的快速链路适配方法。 新的速率指示（RI）字段被并入数据分组中，以便能够在接收机侧自动检测速率自适应。 数据分组包括前导码，包括RI字段的第一分组部分和包括该PDU的第二分组部分。 第一分组部分以第一速率编码，而第二分组部分由RI字段指示的第二速率编码。 当链路质量好/差时，发送设备提高/降低编码率。 接收设备可以通过LMP消息提供推荐的速率或链路质量反馈信息，以帮助发送设备进行速率适配决策。 发射机可以在没有接收机推荐的情况下单方面地决定第二分组部分的数据速率。

公开(公告)号：US20160157266A1

公开(公告)日：2016-06-02

申请号：US14955241

申请日：2015-12-01

Applicant: MEDIATEK INC.

Inventor： James June-Ming Wang ,  Ching-Hwa Yu ,  Yuh-Ren Jauh ,  Chih-Shi Yee

IPC: H04W74/00 ,  H04W72/04 ,  H04W56/00 ,  H04W74/08

CPC classification number: H04W74/004 ,  H04W56/0005 ,  H04W72/042 ,  H04W72/121 ,  H04W74/00 ,  H04W74/06 ,  H04W74/0833 ,  H04W84/12

Abstract: 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.

Abstract translation: 在无线通信系统中提出了STA发起的上行链路（UL）聚合的方法。 在STA发起的UL聚合下，STA可以通过竞争获得对媒体的访问，并且在获得TXOP之后，它将TXOP所有权传递给其AP，以允许其触发UL MU传输。 因此，AP在传统AP和STA保持公平的同时增加了利用介质的机会。 此外，一旦AP接管TXOP的所有权，如果它检测到空闲次要信道，则它可以在空闲次信道上启用UL聚合，从而充分利用整个系统带宽。

公开(公告)号：US20160157195A1

公开(公告)日：2016-06-02

申请号：US14952966

申请日：2015-11-26

Applicant: MEDIATEK INC.

Inventor： James June-Ming Wang ,  Yuh-Ren Jauh ,  Ching-Hwa Yu ,  Chih-Shi Yee ,  Yasantha N. Rajakarunanayake ,  Tianyu Wu

IPC: H04W56/00 ,  H04W72/04 ,  H04W72/08

CPC classification number: H04W56/001 ,  H04W56/0015 ,  H04W72/046 ,  H04W72/082 ,  H04W84/12

Abstract: A method of mitigating inter-BSS interference via synchronized inter-BSS operation is proposed. By aligning the transmission of UL and DL transmission in two overlapping OBSSs, the inter-BSS STA-to-STA and inter-BSS AP-to-AP types of interference can be eliminated. Furthermore, based on the BSS overlapping geometry and the STA location, different interference mitigation schemes can be applied to mitigate inter-BSS AP-to-STA and inter-BSS STA-to-AP types of interference.

Abstract translation: 提出了一种通过同步的BSS间操作来减轻BSS间干扰的方法。 通过在两个重叠的OBSS中对齐UL和DL传输的传输，可以消除BSS间STA到STA和BSS间AP到AP的干扰类型。 此外，基于BSS重叠几何和STA位置，可以应用不同的干扰减轻方案来减轻BSS间AP到STA和BSS间STA到AP的干扰类型。

公开(公告)号：US20160066257A1

公开(公告)日：2016-03-03

申请号：US14838366

申请日：2015-08-28

Applicant: MEDIATEK INC.

Inventor： Jianhan Liu ,  Tianyu Wu ,  Rongsheng Huang ,  James June-Ming Wang

IPC: H04W48/16 ,  H04L5/00 ,  H04W72/08

CPC classification number: H04L5/006 ,  H04L1/0003 ,  H04W28/06 ,  H04W28/18 ,  H04W48/16 ,  H04W74/00 ,  H04W74/0808 ,  H04W84/12 ,  Y02D70/00 ,  Y02D70/142

Abstract: A spatial reuse prioritized channel access scheme is proposed to enhance the average throughput per station in a wireless network by optimizing spatial reuse. Spatial reuse capability (SRC) is defined as a monotonically decreasing function of co-channel interference signal strength from OBSSs. Higher spatial reuse capability can be transformed into higher data rate or less usage of airtime by using higher MCS or less interferences to OBSSs by reducing TX power. By allowing the stations that have larger spatial reuse capability to have higher probability to win channel access contention, the overall network throughput is enhanced.

Abstract translation: 提出了空间重用优先级信道接入方案，通过优化空间重用来提高无线网络中每个站的平均吞吐量。 空间复用能力（SRC）被定义为来自OBSS的同信道干扰信号强度的单调递减函数。 通过降低TX功率，可以通过使用更高的MCS或更少的OBSS干扰来将更高的空间重用能力转换为更高的数据速率或更少的通话时间的使用。 通过允许具有较大空间重用能力的站点具有较高的赢得频道接入争用的概率，增强了整体网络吞吐量。