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1. 发明授权

US12004191B2 Method and apparatus for coordinated multi-access point channel access in a wireless network 有权
公开(公告)号：US12004191B2
公开(公告)日：2024-06-04
申请号：US17978862
申请日：2022-11-01
申请人： MediaTek Singapore Pte. Ltd.
发明人： Yongho Seok , Jianhan Liu , James Chih-Shi Yee , James June-Ming Wang , Thomas Edward Pare, Jr. , Shihchieh Lee
IPC分类号： H04W28/20 , H04W52/36 , H04W72/04 , H04W72/23
CPC分类号： H04W72/23 , H04W52/367 , H04W72/04
摘要： Embodiments of the present invention provide a method and apparatus for coordinated multi-AP channel access in a wireless network. A wireless AP that obtains a transmission opportunity (TXOP) (a “coordinator AP”) can grant one or more STAs or APs under control of the coordinator AP the use of some of the bandwidth granted by the TXOP. The STAs or APs that are granted the use of the bandwidth are referred to as “coordinated APs.” Thereafter, a coordinator AP or a coordinated AP can create a new basic service set (BSS) of devices for coordinating data transmissions. For example, the coordinated AP may serve as a relay, where the coordinated AP services devices in a new BSS by sending and receiving data with a coordinator AP in a different BSS.

2. 发明授权

US09992797B2 Wide bandwidth favored channel access methods in wireless local area networks 有权
公开(公告)号：US09992797B2
公开(公告)日：2018-06-05
申请号：US14995560
申请日：2016-01-14
申请人： MEDIATEK Singapore Pte. Ltd.
发明人： Jianhan Liu , James June-Ming Wang
IPC分类号： H04W84/12 , H04W74/08
CPC分类号： H04W74/08 , H04W74/0808 , H04W84/12
摘要： A method to improve channel access opportunity for wide bandwidth transmission in wireless local area networks is proposed. The method allows different clear channel assessment (CCA) thresholds for different transmission channel bandwidth. During a primary channel CCA process, a low CCA threshold level is applied for an intended narrow transmission channel bandwidth, while a high CCA threshold level is applied for an indented wide transmission channel bandwidth. In addition to the “all bandwidth transmission branch” that is based on the low CCA level, the “wide bandwidth transmission branch” is based on the high CCA level, which increases the opportunity for channel access by raising the CCA levels based on intended transmission channel bandwidths. As a result, the likelihood of wide channel transmission is increased.

3. 发明授权

US09775007B2 Group based location service in wireless local area networks 有权
公开(公告)号：US09775007B2
公开(公告)日：2017-09-26
申请号：US14510039
申请日：2014-10-08
申请人： MEDIATEK Singapore Pte. Ltd.
发明人： Chao-Chun Wang , Chih-Shi Yee , Ching-Hwa Yu , James June-Ming Wang
IPC分类号： H04W4/00 , H04W4/08 , H04W4/02 , H04W64/00 , G01S5/00 , G01S5/02 , G01S5/14 , H04W84/12
CPC分类号： H04W4/08 , G01S5/0027 , G01S5/0289 , G01S5/14 , H04W4/02 , H04W64/00 , H04W84/12
摘要： A method of group-based location service is proposed. A wireless station initiates a ranging process with a plurality of wireless communications devices in a wireless local area network. The station belongs to a group of wireless stations. The station exchanges measurement frames with the plurality of wireless communications devices during the ranging process. The station then computes a plurality of distances to each of the plurality of wireless communications devices and thereby determining an absolute location of the station. Finally, the station informs the absolute location to a group owner of the group of wireless stations.

4. 发明公开

US20230269592A1 Multi-Access Point Coordinated Spatial Reuse Protocol And Algorithm 审中-公开
公开(公告)号：US20230269592A1
公开(公告)日：2023-08-24
申请号：US18138047
申请日：2023-04-22
申请人： MediaTek Singapore Pte. Ltd.
发明人： James June-Ming Wang , Chung-Ta Ku , Gabor Bajko , Gary A. Anwyl , Shuling Feng , Jianhan Liu , Yongho Seok , Po-Yuen Cheng , James Chih-Shi Yee , Thomas Edward Pare, JR.
IPC分类号： H04W16/02 , H04W24/08 , H04W48/20 , H04W52/04
CPC分类号： H04W16/02 , H04W24/08 , H04W48/20 , H04W52/04
摘要： An apparatus implemented in a master access point (AP) selects at least one basic service set (BSS) from one or more neighbor BSSs to form a spatial reuse group (SRG). The apparatus then performs coordinated spatial reuse (CSR) in the SRG with a set of overlapping basic service set (OBSS) power detection (PD) parameters.

5. 发明授权

US11152977B2 Integrity and quality monitoring and signaling for sounding and reduced feedback 有权
公开(公告)号：US11152977B2
公开(公告)日：2021-10-19
申请号：US16798695
申请日：2020-02-24
申请人： MediaTek Singapore Pte. Ltd.
发明人： James June-Ming Wang , Jianhan Liu , Vishakan Ponnampalam , Chao-Chun Wang , Huanchun Ye
IPC分类号： H04B7/0452 , H04B7/0417 , H04B7/06 , H04L1/00 , H04L25/02
摘要： A method of sounding and feedback with channel quality information and reduced overhead is provided. A receiving station receives a sounding signal transmitted from an access point over multiple sub-channels of a wide channel in a wireless network. The receiving station detects channel quality based on the received sounding signal for each sub-channel. The receiving station then performs channel estimation based on the received sounding signal and thereby determining feedback information. Finally, the receiving station transmits a feedback message to the access point, the feedback message contains NULL feedback information, reduced feedback information, or channel integrity/quality indicators based on the channel quality information for each sub-channel. Based on the feedback message, the access point may repeat the sounding process, narrow the transmission bandwidth, or select only stations who have indicated uncorrupted channel sounding for MU-MMO transmission.

6. 发明授权

US10973052B2 Transmission between basic service sets in wireless networks considering spatial reuse 有权
公开(公告)号：US10973052B2
公开(公告)日：2021-04-06
申请号：US16179196
申请日：2018-11-02
申请人： MediaTek Singapore Pte. Ltd.
发明人： Yongho Seok , James June-Ming Wang , Chao-Chun Wang , Chih-Shi Yee
IPC分类号： H04W74/08 , H04W72/04 , H04W84/12 , H04W80/02 , H04W80/08
摘要： A data unit (e.g., a physical layer convergence procedure (PLCP) protocol data unit (PPDU)) is detected at a first wireless device that is a member of a basic service set (BSS). The data unit was sent on a channel from a second wireless device that is a member of an overlapping basic service set (OBSS). When the first wireless device ignores the data unit and obtains a transmit opportunity for the channel according to a spatial reuse procedure, then the first wireless device is prohibited from transmitting a frame to a device that is a member of the OBSS during the time interval associated with the transmit opportunity.

7. 发明授权

US10178686B2 Increased network throughput with CCA level enhancement 有权
公开(公告)号：US10178686B2
公开(公告)日：2019-01-08
申请号：US14998126
申请日：2015-12-24
申请人： MEDIATEK Singapore Pte. Ltd.
发明人： James June-Ming Wang , Jianhan Liu , YungPing Hsu
IPC分类号： H04W72/12 , H04W74/08
摘要： A method of channel contention procedure with CCA level enhancement is proposed. A wireless device initiates an EDCA channel contention procedure to gain access to the wireless medium. The device determines an intended TX channel width and performs primary channel CCA using a set of CCA levels based on the intended TX channel width for determining channel idle or busy condition in the EDCA procedure. Upon gaining access, the device performs secondary channel CCA and thereby determining a final TX channel width. The device transmits radio signals using the final TX channel width and a TX spectral power density, which is adjusted to be corresponding to the intended TX channel width. By raising CCA levels to be based on the intended transmission channel width, the likelihood of wide channel width transmission is increased. As a result, significant network throughput increase can be accomplished in dense deployment scenarios.

8. 发明授权

US09401738B2 Method for simplified closed-loop antenna tuning 有权
标题翻译：简化闭环天线调谐方法
公开(公告)号：US09401738B2
公开(公告)日：2016-07-26
申请号：US14799413
申请日：2015-07-14
申请人： MEDIATEK Singapore Pte. Ltd.
发明人： James June-Ming Wang , Qiang Zhou , YungPing Hsu , Bernard Mark Tenbroek
IPC分类号： H04B1/40 , H01Q1/50 , H01Q5/335
CPC分类号： H04B1/40 , H01Q5/335 , H03H7/38 , H03H7/40 , H04B1/0458 , H04B1/18
摘要： A method of closed-loop antenna tuning (CLAT) search strategy based on maximum Relative Transducer Gain (RTG) is proposed. A search region that account for TX input mismatch and forward voltage gain is pre-computed. The search region that is independent of antenna load can be pre-computed to reduce the computation complexity. The Maximum RTG is searched by estimating antenna S-parameters corresponding to a good load match. The search is conducted between the peak forward voltage gain and the best load match. Global optimal with reasonable RTG can be found with limited number of iterations. The transmitter search region can further be constrained by the receiver path mismatching.
摘要翻译：提出了一种基于最大相对传感器增益（RTG）的闭环天线调谐（CLAT）搜索策略。预先计算了考虑到TX输入失配和正向电压增益的搜索区域。可以预先计算独立于天线负载的搜索区域，以减少计算复杂度。通过估计对应于良好负载匹配的天线S参数来搜索最大RTG。搜索在峰值正向电压增益和最佳负载匹配之间进行。可以用有限的迭代次数找到具有合理RTG的全局最优化。发射机搜索区域可以进一步受到接收机路径不匹配的约束。

9. 发明申请

US20160157264A1 Increased network throughput with CCA level enhancement 审中-公开
标题翻译：提高CCA级别的网络吞吐量
公开(公告)号：US20160157264A1
公开(公告)日：2016-06-02
申请号：US14998126
申请日：2015-12-24
申请人： MEDIATEK Singapore Pte. Ltd.
发明人： James June-Ming Wang , Jianhan Liu , YungPing Hsu
IPC分类号： H04W72/12
CPC分类号： H04W72/1257 , H04W74/0808
摘要： A method of channel contention procedure with CCA level enhancement is proposed. A wireless device initiates an EDCA channel contention procedure to gain access to the wireless medium. The device determines an intended TX channel width and performs primary channel CCA using a set of CCA levels based on the intended TX channel width for determining channel idle or busy condition in the EDCA procedure. Upon gaining access, the device performs secondary channel CCA and thereby determining a final TX channel width. The device transmits radio signals using the final TX channel width and a TX spectral power density, which is adjusted to be corresponding to the intended TX channel width. By raising CCA levels to be based on the intended transmission channel width, the likelihood of wide channel width transmission is increased. As a result, significant network throughput increase can be accomplished in dense deployment scenarios.
摘要翻译：提出了一种具有CCA级别增强的信道争用过程的方法。无线设备发起EDCA信道争用过程以访问无线介质。设备确定预期的TX信道宽度，并且使用基于预期TX信道宽度的一组CCA级别来执行主信道CCA，以在EDCA过程中确定信道空闲或繁忙状态。在获得访问时，设备执行辅助信道CCA，从而确定最终的TX信道宽度。设备使用最终TX信道宽度和TX频谱功率密度来发射无线电信号，该频谱功率密度被调整为对应于预期的TX信道宽度。通过提高基于预期传输信道宽度的CCA级别，增加宽信道宽度传输的可能性。因此，在密集部署情况下可以实现显着的网络吞吐量增加。

10. 发明授权

US09344165B2 Method and apparatus of beam training for MIMO operation and multiple antenna beamforming operation 有权
公开(公告)号：US09344165B2
公开(公告)日：2016-05-17
申请号：US14960690
申请日：2015-12-07
申请人： MEDIATEK Singapore Pte. Ltd.
发明人： James June-Ming Wang
IPC分类号： H04B7/02 , H04B7/04 , H04B7/06 , H04B7/08
CPC分类号： H04B7/043 , H04B7/0417 , H04B7/063 , H04B7/0695 , H04B7/0697 , H04B7/088 , H04J11/0063
摘要： The disclosed invention provides an efficient method for MIMO beam training for multiple antennas to enable spatial multiplexing MIMO operation and spatial combining in a wireless network. The invention discloses a simple and efficient beam-training algorithm and protocol for MIMO operation that operates in high SNR condition for reliable MIMO operation. In one novel aspect, the best MIMO beam combinations are determined after TX sector sweeping and RX sector sweeping. The best MIMO beam combinations are determined in such a way that no any selected TX/RX sectors come from the same TX/RX antenna/beamformer. The selection criteria includes not only signal quality, but also considers mutual interference and leakage among multiple MIMO spatial streams to improve overall MIMO performance. Simultaneous RX or TX training are also supported to reduce training time.

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