公开(公告)号：US20180020367A1

公开(公告)日：2018-01-18

申请号：US15648357

申请日：2017-07-12

Applicant: MEDIATEK INC.

Inventor： Chien-Fang Hsu ,  Chao-Chun Wang ,  Chih-Shi Yee ,  Gabor Bajko

IPC: H04W24/02 ,  H04W24/10 ,  H04W84/12

CPC classification number: H04W24/02 ,  H04B7/0452 ,  H04B17/373 ,  H04J11/0033 ,  H04L5/0057 ,  H04L5/0092 ,  H04W8/22 ,  H04W24/10 ,  H04W28/0247 ,  H04W36/22 ,  H04W40/244 ,  H04W48/06 ,  H04W48/10 ,  H04W48/12 ,  H04W72/1252 ,  H04W84/12 ,  H04W88/02 ,  H04W88/08 ,  H04W92/10

Abstract: Systems and methods of providing Basis Service Set (BSS) load information pertinent to multi-user (MU) communications in WLAN systems. An access point (AP) can determine the counts of MU-capable user stations (STAs) active STAs in a BSS. Each MU-capable STA is configured for Multi-User Multiple-Input Multiple-Output (MU-MIMO) communications and/or Orthogonal Frequency-Division Multiple Access (OFDMA) communications. The AP can further determine ratios of PPDU time over an observation period of MU uplink (UL) and downlink (DL) communications, respectively. The AP can further determine an underutilization level of each available frequency subband, the underutilization level integrating the actual underutilization in terms of both spatial streams and frequency subbands. The DL and UL underutilization levels can be separately determined and reported. The MU BSS load information can be included in a beacon frame as a BSS load information element and distributed to user STAs periodically.

公开(公告)号：US20170359819A1

公开(公告)日：2017-12-14

申请号：US15410232

申请日：2017-01-19

Applicant: MEDIATEK INC.

Inventor： Chao-Chun Wang ,  Chih-Shi Yee ,  I-Cheng Tsai

IPC: H04W72/04 ,  H04L5/00 ,  H04W76/02

CPC classification number: H04W72/0446 ,  H04L5/0007 ,  H04L5/0037 ,  H04W76/14

Abstract: Apparatus and methods are provided for peer-to-peer communication network and multi-channel operation over OFDMA. In novel aspect, the communication device sends a first frame to reserve a time period for one or more peer-to-peer services in a wireless communication network, establishes one or more sessions with one or more peer-to-peer communication devices in the time period reserved for a subset of the one or more peer-to-peer services, transmits a second frame allocating radio resource for a subset of communications devices of the one or more communications devices, and sends or receives one or more data frames to/from one or more peer-to-peer communication devices concurrently using OFDMA, wherein the one or more data frames are received during the reserved time period. In one embodiment, the communication device is non-AP. In another embodiment, the second frame indicates resource blocks allocated for each of the one or more peer-to-peer communication devices.

公开(公告)号：US20160149676A1

公开(公告)日：2016-05-26

申请号：US14946975

申请日：2015-11-20

Applicant: MEDIATEK INC.

Inventor： Yuh-Ren Jauh ,  Chao-Chun Wang

IPC: H04L5/00 ,  H04W52/24 ,  H04W72/04

CPC classification number: H04L5/006 ,  H04W52/242 ,  H04W72/04 ,  H04W74/0808 ,  H04W74/0816 ,  H04W84/12

Abstract: A method of sub-channel independent network allocation vector (NAV) management by a wireless station (STA) in a wideband wireless communications system is proposed. In the wideband system having multiple sub-bands, each NAV for a corresponding sub-band is independently managed. The protection duration for each NAV is independent for each sub-band and the threshold or update rule for NAV modification is also independent for each sub-band. The threshold or update rule for NAV modification may also be different when the NAV is generated or propagated by an OBSS STA. Furthermore, early termination of NAV is allowed if the NAV is set by an OBSS STA only.

Abstract translation: 提出了一种在宽带无线通信系统中由无线站（STA）进行子信道独立网络分配向量（NAV）管理的方法。 在具有多个子带的宽带系统中，用于相应子带的每个NAV被独立地管理。 每个NAV的保护持续时间对于每个子带是独立的，并且用于NAV修改的阈值或更新规则对于每个子带也是独立的。 当NAV由OBSS STA生成或传播时，NAV修改的阈值或更新规则也可能不同。 此外，如果NAV仅由OBSS STA设置，则允许提前终止NAV。

公开(公告)号：US20160014811A1

公开(公告)日：2016-01-14

申请号：US14794680

申请日：2015-07-08

Applicant: MEDIATEK INC.

Inventor： Yuh-Ren Jauh ,  Chao-Chun Wang

IPC: H04W74/00 ,  H04B7/04 ,  H04L5/00

CPC classification number: H04W74/006 ,  H04B7/0452 ,  H04L5/0007 ,  H04W84/12

Abstract: Methods are provided for concurrent communications among multiple wireless communications devices. In one novel aspect, the wireless station transmits a wideband signal to a plurality of wireless communications devices using downlink MIMO and/or OFDMA. The wireless station receives a plurality of responding frames from the plurality of wireless communications devices concurrently using OFDMA. In one embodiment, the wireless station transmits a MU indication bit and MU bandwidth assignment information in the downlink MIMO and/or OFDMA frames. In another novel aspect, the uplink responding frames from multiple wireless communications devices are sent on a corresponding narrow concurrently over more than one transmission instance. AP polling or SIFS only is used between two transmission instances. When the concurrent responding frames occupies less than a bandwidth of an available uplink OFDMA bandwidth, the unoccupied bandwidth is either left empty or occupied by one or more duplicated responding frames.

Abstract translation: 提供了用于多个无线通信设备之间并发通信的方法。 在一个新颖的方面，无线站使用下行链路MIMO和/或OFDMA向多个无线通信设备发送宽带信号。 无线站同时使用OFDMA从多个无线通信设备接收多个响应帧。 在一个实施例中，无线站在下行链路MIMO和/或OFDMA帧中发送MU指示位和MU带宽分配信息。 在另一个新颖的方面，来自多个无线通信设备的上行链路响应帧在多于一个的传输实例上同时发送在相应的窄带上。 仅在两个传输实例之间使用AP轮询或SIFS。 当并发响应帧占用小于可用上行链路OFDMA带宽的带宽时，未占用带宽将被留空或被一个或多个复制响应帧占用。

公开(公告)号：US20160014763A1

公开(公告)日：2016-01-14

申请号：US14833072

申请日：2015-08-22

Applicant: MEDIATEK INC.

Inventor： Yuh-Ren Jauh ,  Jianhan Liu ,  Chao-Chun Wang ,  James June-Ming Wang ,  Thomas Edward PARE, JR.

IPC: H04W72/04 ,  H04L5/00 ,  H04B7/04

CPC classification number: H04L5/0007 ,  H04B7/0452 ,  H04L5/0055

Abstract: Methods and apparatus are provided for burst OFDMA support MU-MIMO in the WLAN network. In one novel aspect, pluralities of user channels are configured for a downlink wideband channel, wherein each user channel is associated with a user group selecting from a SU-SISO, or a SU-MIMO or a MU-MIMO. In one embodiment, the SIG1 and SIG2 signaling fields are independent for each user channel. In another embodiment, the SIG1 fields are duplicates for all user channels carrying common information. The SIG2 fields for each user group are different from each other carrying user group specific information. In another novel aspect, an uplink OFDMA frames contains ACK packets from multiple STAs concurrently using an uplink wideband channel. In one embodiment, one ACK packet is sent for a MU-MIMO user group. In another embodiment, the uplink ACK packet assignment is based on indications in the downlink PHY SIG field.

Abstract translation: 为WLAN网络中的突发OFDMA支持MU-MIMO提供了方法和装置。 在一个新颖的方面，为下行链路宽带信道配置多个用户信道，其中每个用户信道与从SU-SISO或SU-MIMO或MU-MIMO选择的用户组相关联。 在一个实施例中，SIG1和SIG2信令字段对于每个用户信道是独立的。 在另一个实施例中，SIG1字段是携带公共信息的所有用户信道的重复。 每个用户组的SIG2字段彼此不同，承载用户组的具体信息。 在另一个新颖的方面，上行链路OFDMA帧包含使用上行链路宽带信道同时来自多个STA的ACK分组。 在一个实施例中，为MU-MIMO用户组发送一个ACK分组。 在另一个实施例中，上行链路ACK分组分配基于下行链路PHY SIG字段中的指示。

公开(公告)号：US20150181239A1

公开(公告)日：2015-06-25

申请号：US14135599

申请日：2013-12-20

Applicant: MEDIATEK INC.

Inventor： Shao-Wei Chen ,  Chao-Chun Wang ,  Tsai-Yuan Hsu ,  Shun-Yong Huang ,  Chih-Shi Yee

IPC: H04N19/66 ,  H04N19/164 ,  H04N19/172 ,  H04N19/115

CPC classification number: H04N21/43615 ,  H04N21/234381 ,  H04N21/242 ,  H04N21/4122 ,  H04N21/4126

Abstract: A method for frame rate control in a transmitter of a wireless communications system is disclosed. The method comprises generating a frame and a first information corresponding to a first expiration time of the frame by a frame generating module; handling the frame according to the first expiration time by the driver module; and informing the frame generating module an adjusting information according to a first pre-determined rule by the driver module.

Abstract translation: 公开了一种用于无线通信系统的发射机中的帧速率控制的方法。 该方法包括：通过帧产生模块生成帧和对应于帧的第一到期时间的第一信息; 由驾驶员模块根据第一期满时间处理帧; 以及根据所述驱动器模块的第一预定规则通知所述帧生成模块的调整信息。

公开(公告)号：US10091822B2

公开(公告)日：2018-10-02

申请号：US14977632

申请日：2015-12-21

Applicant: MEDIATEK INC.

Inventor： Rongsheng Huang ,  Tianyu Wu ,  Jianhan Liu ,  Chao-Chun Wang ,  Chih-Shi Yee

IPC: H04W74/08 ,  H04W72/02 ,  H04W74/02

Abstract: A method of improved allocation of uplink resources in an OFDMA network is proposed. A wireless communications station (an AP) reserves both dedicated resource and contention resource for uplink OFDMA operation for a list of communications devices (STAs). The AP can switch between random access operation and non-random access operation without the need for any special protection mechanisms. In the event of an increase in uplink OFDMA frame collisions the AP can switch from random operation to non-random operation to reduce the number of collisions. In the event of a decrease in uplink OFDMA frame collisions the AP can switch from non-random operation to random operation to reduce required AP processing. The AP can also dynamically control a STA access probability to reduce the number of collisions by reducing the number of uplink OFDMA frames each STA transmits.

公开(公告)号：US09788187B2

公开(公告)日：2017-10-10

申请号：US14826851

申请日：2015-08-14

Applicant: MEDIATEK INC.

Inventor： Chao-Chun Wang

IPC: H04K1/10 ,  H04L27/28 ,  H04W8/00 ,  H04W72/02 ,  H04W76/02 ,  H04W88/06

CPC classification number: H04W8/005 ,  H04W72/02 ,  H04W88/06

Abstract: A communication device includes a Session Management Module (SMM) that controls data that is communicated via a first communication link and the data that is communicated via a second communication link and causes the following steps to be performed: discovering a second device via a first communication link, establishing a communication session between the communication device and the second device over a first subset of the communication links (the selection of the first subset of the communication links is a function of a communication link selection rule), exchanging a first type of data over the at least one of the first subset of communication links (the at least one of the first subset of communication links is selected in accordance with a communication link data selection rule), and ending the communication session between the communication device and the second device.

公开(公告)号：US20160330753A1

公开(公告)日：2016-11-10

申请号：US15145309

申请日：2016-05-03

Applicant: MEDIATEK INC.

Inventor： Yuh-Ren Jauh ,  Ching-Hwa Yu ,  Chao-Chun Wang

IPC: H04W72/10 ,  H04L5/00 ,  H04W74/08 ,  H04W72/04

CPC classification number: H04W72/10 ,  H04L5/0007 ,  H04W28/065 ,  H04W72/044 ,  H04W74/0866 ,  H04W84/12 ,  H04W88/08

Abstract: A method of performing OFDMA transmission with aggregation from multiple access categories to improve channel utilization of a wireless channel is proposed. In one novel aspect, data from multiple access categories are allowed to be aggregated and transmitted in the same packet to utilize idle time efficiently. In downlink OFDMA, AP can send different AC data to different STAs so that AP can better arrange the transmission resource block. If the resource for one STA has long enough idle time, AP can aggregate more data that is different to the current AC for the same STA to better utilize the resource. In UL OFDMA, different STAs can send different AC data to AP. If the resource for one STA has long enough idle time, the STA can aggregate more data that is different to the current AC to better utilize the resource.

Abstract translation: 提出了一种通过来自多个接入类别的聚合来执行OFDMA传输以提高无线信道的信道利用率的方法。 在一个新颖的方面，允许来自多个接入类别的数据被聚合并在相同的分组中发送以有效地利用空闲时间。 在下行OFDMA中，AP可以向不同的STA发送不同的AC数据，使得AP能够更好地布置传输资源块。 如果一个STA的资源具有足够长的空闲时间，则AP可以聚合更多与当前AC不同的数据，以便更好地利用资源。 在UL OFDMA中，不同的STA可以向AP发送不同的AC数据。 如果一个STA的资源具有足够的空闲时间，则STA可以聚合更多与当前AC不同的数据，以更好地利用资源。

公开(公告)号：US20160183305A1

公开(公告)日：2016-06-23

申请号：US14977632

申请日：2015-12-21

Applicant: MEDIATEK INC.

Inventor： RONGSHENG HUANG ,  Tianyu Wu ,  Jianhan Liu ,  Chao-Chun Wang ,  Chih-Shi Yee

IPC: H04W74/08

CPC classification number: H04W74/0833 ,  H04W74/02

Abstract: A method of improved allocation of uplink resources in an OFDMA network is proposed. A wireless communications station (an AP) reserves both dedicated resource and contention resource for uplink OFDMA operation for a list of communications devices (STAs). The AP can switch between random access operation and non-random access operation without the need for any special protection mechanisms. In the event of an increase in uplink OFDMA frame collisions the AP can switch from random operation to non-random operation to reduce the number of collisions. In the event of a decrease in uplink OFDMA frame collisions the AP can switch from non-random operation to random operation to reduce required AP processing. The AP can also dynamically control a STA access probability to reduce the number of collisions by reducing the number of uplink OFDMA frames each STA transmits.

Abstract translation: 提出了一种改善OFDMA网络中上行链路资源分配的方法。 无线通信站（AP）为通信设备（STA）列表的上行链路OFDMA操作保留专用资源和争用资源。 AP可以在随机访问操作和非随机访问操作之间切换，而不需要任何特殊的保护机制。 在上行链路OFDMA帧冲突增加的情况下，AP可以从随机操作切换到非随机操作，以减少冲突次数。 在上行链路OFDMA帧冲突减少的情况下，AP可以从非随机操作切换到随机操作，以减少所需的AP处理。 AP还可以通过减少每个STA发送的上行链路OFDMA帧的数量来动态地控制STA接入概率以减少冲突的数量。