公开(公告)号：US09055459B2

公开(公告)日：2015-06-09

申请号：US13762342

申请日：2013-02-07

Applicant: QUALCOMM Incorporated

Inventor： Shu Du ,  Zhanfeng Jia ,  Ning Zhang ,  James S. Cho ,  Qinghai Gao ,  Rahul Tandra

IPC: H04W24/02 ,  H04B7/04 ,  H04L1/00

CPC classification number: H04W24/02 ,  H04B7/0452 ,  H04L1/0002 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0015 ,  H04L1/0019 ,  H04L1/0033 ,  H04L1/06 ,  Y02D50/10

Abstract: A method of performing dual-mode rate control for an access point in a wireless communication system includes a single-user mode of operation and a multi-user mode of operation. In the single-user mode, a basic rate for a station is determined based on channel conditions. In the multi-user mode, a rate for a plurality of stations is determined using tracking. The tracking includes performing a sounding for the plurality of stations. An initial multi-user current rate is then set equal to a function of a number of users and the basic rate. A transmission is sent to the plurality of stations using the current rate. A packet error rate (PER) is detected during transmission to the plurality of stations. The current rate is adjusted based on the PER. After rate adjustment, either sounding is triggered or the method returns to sending a transmission using the current rate.

Abstract translation: 对无线通信系统中的接入点进行双模速率控制的方法包括单用户操作模式和多用户操作模式。 在单用户模式中，基于信道条件确定站的基本速率。 在多用户模式中，使用跟踪确定多个站的速率。 跟踪包括对多个站执行探测。 然后将初始多用户当前速率设置为等于用户数和基本速率的函数。 使用当前速率向多个站发送传输。 在传输到多个站期间检测到分组错误率（PER）。 当前费率根据PER进行调整。 速率调整后，触发声音或方法返回使用当前速率发送传输。

公开(公告)号：US20150092639A1

公开(公告)日：2015-04-02

申请号：US14041209

申请日：2013-09-30

Applicant: QUALCOMM Incorporated

Inventor： Zhanfeng Jia ,  Shu Du

IPC: H04W52/02

CPC classification number: H04W52/02 ,  H04W52/0212 ,  H04W72/1263 ,  H04W84/12 ,  Y02D70/00 ,  Y02D70/142 ,  Y02D70/144 ,  Y02D70/146 ,  Y02D70/162 ,  Y02D70/22

Abstract: An access point may transmit, to a first wireless device, a message indicating a busy period of the access point. The busy period is a time during which the access point will perform wireless operations with at least a second wireless device different from the first wireless device. During the busy period, the access point may refrain from transmitting from the access point to the first wireless device. The message indicating the busy period may include a duration of the busy period. The message indicating the busy period may be included in a portion of a data transmission to the first wireless device. The first wireless device may enter a low power mode (e.g., sleep operating state) responsive to the busy period.

Abstract translation: 接入点可以向第一无线设备发送指示接入点的繁忙时段的消息。 繁忙时段是接入点将与不同于第一无线设备的至少第二无线设备执行无线操作的时间。 在繁忙期间，接入点可以避免从接入点向第一无线设备发送。 指示繁忙时段的消息可以包括繁忙时段的持续时间。 指示繁忙时段的消息可以被包括在向第一无线设备的数据传输的一部分中。 响应于繁忙时段，第一无线设备可以进入低功率模式（例如，睡眠操作状态）。

公开(公告)号：US08929474B2

公开(公告)日：2015-01-06

申请号：US13830177

申请日：2013-03-14

Applicant: QUALCOMM Incorporated

Inventor： Qinghai Gao ,  Balaji Srinivasan Babu ,  Shu Du

IPC: H04B7/02 ,  H04L1/02 ,  H04L1/00

CPC classification number: H04L1/0027 ,  H04L25/0224

Abstract: Systems and methods are disclosed for optimizing the sounding interval in a MIMO communications system. Following a channel sounding protocol, net throughput may be estimated over time. The sounding interval may correspond to the period of time between the end of the sounding protocol and a time when the estimated net throughput is maximized. Estimating net throughput may involve estimating the number of bits that may be successfully transmitted divided by the time required to transmit. The number of bits that may be successfully transmitted may be estimated from a statistical channel profile including goodput.

Abstract translation: 公开了用于优化MIMO通信系统中的探测间隔的系统和方法。 根据频道侦听协议，可以估计随时间的净吞吐量。 探测间隔可以对应于探测协议结束与估计净吞吐量最大化的时间之间的时间段。 估计净吞吐量可以包括估计可以成功发送的比特数除以发送所需的时间。 可以从包括有效输出的统计信道简档估计可以成功发送的比特数。

公开(公告)号：US20140269377A1

公开(公告)日：2014-09-18

申请号：US13924377

申请日：2013-06-21

Applicant: QUALCOMM Incorporated

Inventor： Zhanfeng Jia ,  Shu Du ,  Ning Zhang

IPC: H04W24/00

CPC classification number: H04L1/00 ,  H04L1/0025 ,  H04L1/0026 ,  H04L1/1671 ,  H04L1/20

Abstract: A method of providing feedback on channel observations to a transmitter includes observing a channel at a receiver based on received signals from the transmitter and determining whether a packet error rate (PER) is rising based on the observing. The receiver determines whether a rising PER is caused by channel noise or interference, and transmits a message to the transmitter indicating the cause of the rising PER. The cause may be encoded in reserved bits of a block acknowledgement (BA) frame or an Acknowledge (ACK) frame, or in a modulation coding scheme (MCS) used to transmit the message. The cause may be detected in response to SNR/RSSI level of received signals, or a number of receiver restarts. The transmitter may change the transmit rate adaptation algorithm to use a lower MCS if channel noise causes the rising PER, and a higher MCS if interference causes the rising PER.

Abstract translation: 向发射机提供信道观测的反馈的方法包括基于来自发射机的接收信号观察接收机处的信道，并基于观测确定分组差错率（PER）是否正在上升。 接收机确定上升的PER是由信道噪声还是干扰引起的，并且向发射机发送指示引起增加的PER的原因的消息。 原因可以在块确认（BA）帧或应答（ACK）帧的保留位或者用于发送消息的调制编码方案（MCS）中编码。 可以响应于接收到的信号的SNR / RSSI电平或者接收机重启的次数来检测原因。 如果信道噪声导致上升的PER，则发射机可以改变发射速率自适应算法以使用较低的MCS，如果干扰导致上升的PER，则发射机可以改变较高的MCS。

公开(公告)号：US20140133303A1

公开(公告)日：2014-05-15

申请号：US13677251

申请日：2012-11-14

Applicant: QUALCOMM INCORPORATED

Inventor： Zhanfeng Jia ,  Shu Du ,  Ning Zhang

IPC: H04W28/02 ,  H04L12/18 ,  H04W4/06

CPC classification number: H04W28/0236 ,  H04L1/0002 ,  H04L1/0019 ,  H04L1/0027 ,  H04L1/0033 ,  H04L1/1685 ,  H04L12/189 ,  H04L2001/0093 ,  H04W4/06

Abstract: A method of providing multicast rate control in a wireless communication device can include transmitting data frames to a plurality of stations in a multicast group with a first data rate. Acknowledgements (ACKs) can then be requested from a first subset of the plurality of stations. Frame losses can be determined using the ACKs from the first subset. A second data rate can be determined based on the frame losses with the first subset. A second subset of the plurality of stations can be selected based on the frame losses with the first subset. Data frames can be transmitted to the plurality of stations with the second data rate. Notably, ACKs only from the second subset of the plurality of stations are requested. Frame losses for the second subset can be determined using those ACKs. A current data rate can be adjusted based on the frame losses for the subset and at least one predetermined threshold. Data frames can be transmitted to the plurality of stations using the adjusted data rate.

Abstract translation: 一种在无线通信设备中提供组播速率控制的方法可以包括以多个第一数据速率向组播组中的多个站发送数据帧。 然后可以从多个站的第一子集请求致谢（ACK）。 可以使用来自第一子集的ACK来确定帧丢失。 可以基于第一子集的帧丢失来确定第二数据速率。 可以基于与第一子集的帧丢失来选择多个站的第二子集。 可以以第二数据速率将数据帧发送到多个站。 值得注意的是，请求仅来自多个站的第二子集的ACK。 可以使用这些ACK来确定第二子集的帧丢失。 可以基于子集的帧丢失和至少一个预定阈值来调整当前数据速率。 可以使用经调整的数据速率将数据帧发送到多个站。

公开(公告)号：US09363686B2

公开(公告)日：2016-06-07

申请号：US13707511

申请日：2012-12-06

Applicant: QUALCOMM Incorporated

Inventor： Shu Du ,  Zhanfeng Jia ,  Ning Zhang ,  Guido R. Frederiks ,  Vincent K. Jones ,  Qinghai Gao

IPC: H04W72/06 ,  H04W24/02 ,  H04J9/00 ,  H04B7/04 ,  H04B7/06 ,  H04L1/00 ,  H04L1/06 ,  H04L1/20

CPC classification number: H04W24/02 ,  H04B7/0452 ,  H04B7/0617 ,  H04B7/0626 ,  H04J9/00 ,  H04L1/0003 ,  H04L1/0009 ,  H04L1/0019 ,  H04L1/0026 ,  H04L1/06 ,  H04L1/203 ,  H04W28/06 ,  Y02D50/10

Abstract: A method of providing rate adaptation in a multi-user wireless communication system including single-user beamforming (SU-BF) and multi-user multiple-input multiple-output (MU-MIMO) is described. In this method, a master rate, which is a modulation and coding scheme (MCS) for the SU-BF, is determined. An MCS for each transmit mode is derived from the master rate using a rate mapping. Using the results from the mapping, the master rate, instead of the MCS for each transmit mode, is tracked. In one embodiment, a mapping calibration is periodically performed.

Abstract translation: 描述了在包括单用户波束成形（SU-BF）和多用户多输入多输出（MU-MIMO）的多用户无线通信系统中提供速率适配的方法。 在该方法中，确定作为SU-BF的调制和编码方案（MCS）的主速率。 使用速率映射从主速率导出每个发送模式的MCS。 使用映射的结果，跟踪每个传输模式的主速率而不是MCS。 在一个实施例中，定期执行映射校准。

公开(公告)号：US20150282005A1

公开(公告)日：2015-10-01

申请号：US14229571

申请日：2014-03-28

Applicant: QUALCOMM Incorporated

Inventor： Shu Du ,  Srinivasa Kumar Duvvuri ,  James Simon Cho ,  Vipin Kumar Mehta ,  Guido Robert Frederiks ,  Arunkumar Jayaraman ,  Matthew Daniel Smith

IPC: H04W28/06 ,  H04W28/14

CPC classification number: H04W28/14 ,  H04L45/245 ,  H04W28/06 ,  H04W28/065 ,  H04W84/12 ,  H04W92/10

Abstract: Methods, systems, and devices are described for establishing a virtual communication link including at least a first and second physical link between two devices. A single virtual packet queue of a device may receive one or more data packets to be transmitted via the virtual communication link. The single virtual packet queue may attach a virtual sequence number to each of the one or more data packets and send the one or more data packets to one or more of the first or the second physical link according to the assigned virtual sequence numbers. The one or more packets may then be communicated via the first and/or second physical links according to link specific sequence numbers, such as medium access control (MAC) sequence numbers, assigned to the one or more data packets by the first and/or second physical links.

Abstract translation: 描述了用于建立包括两个设备之间的至少第一和第二物理链路的虚拟通信链路的方法，系统和设备。 设备的单个虚拟分组队列可以接收经由虚拟通信链路发送的一个或多个数据分组。 单个虚拟分组队列可以将虚拟序列号附加到一个或多个数据分组中的每一个，并且根据所分配的虚拟序列号将一个或多个数据分组发送到第一或第二物理链路中的一个或多个。 然后可以经由第一和/或第二物理链路根据链路特定序列号来传送一个或多个分组，例如通过第一和/或第二物理链路分配给一个或多个数据分组的媒体访问控制（MAC）序列号， 第二物理链接。

公开(公告)号：US09130614B2

公开(公告)日：2015-09-08

申请号：US13830881

申请日：2013-03-14

Applicant: QUALCOMM Incorporated

Inventor： Qinghai Gao ,  Balaji Srinivasan Babu ,  Guido R. Frederiks ,  James S. Cho ,  Shu Du

IPC: H04W72/12 ,  H04W28/02 ,  H04B7/04 ,  H04L1/00

CPC classification number: H04B7/0413 ,  H04B7/0452 ,  H04L1/00 ,  H04L1/0026 ,  H04L1/06 ,  H04L1/1614 ,  H04L1/1628 ,  H04L1/1887 ,  H04W28/0231 ,  H04W72/1226 ,  H04W72/1231 ,  H04W72/1263

Abstract: Systems and methods are disclosed for scheduling SU and MU traffic in a MIMO communications system. Net goodput may be estimated for a station using a plurality of MIMO modes and a transmission to the station may be scheduled using one of the MIMO modes based, at least in part, on the estimated net goodput. Estimating net goodput may include determining a number of bits that may be successfully transmitted to the station using the MIMO mode divided by a time required to transmit the number of bits plus the sounding time. Further, the number of bits that may be successfully transmitted to the station may be based on the number of packets that may be delivered over the upcoming sounding interval and statistically determined goodput for each MIMO mode.

Abstract translation: 公开了用于在MIMO通信系统中调度SU和MU业务的系统和方法。 可以针对使用多个MIMO模式的站估计净有效吞吐量，并且可以至少部分地基于估计的净功率输出，使用MIMO模式之一来调度到站的传输。 估计净有效吞吐量可以包括使用MIMO模式除以传送比特数加上探测时间所需的时间来确定可以成功发送到站的比特数。 此外，可以成功发送到站的比特数可以基于可以通过即将到来的探测间隔递送的分组的数量，以及针对每个MIMO模式的统计确定的输出。

公开(公告)号：US20150245360A1

公开(公告)日：2015-08-27

申请号：US14707450

申请日：2015-05-08

Applicant: QUALCOMM Incorporated

Inventor： Qinghai Gao ,  Balaji Srinivasan Babu ,  Guido Robert Frederiks ,  James Simon Cho ,  Shu Du

IPC: H04W72/08 ,  H04B7/04

CPC classification number: H04B7/0452 ,  H04L1/00 ,  H04L47/25 ,  H04W28/0231 ,  H04W72/121 ,  H04W72/1231

Abstract: A method of performing MIMO wireless communication includes identifying a first wireless device that qualifies for inclusion in a multi-user (MU) group and identifying a set of one or more candidate wireless devices, distinct from the first wireless device, that qualify for inclusion in the MU group. The set includes a second wireless device. A determination is made that an estimated MU-mode net goodput for the first and second wireless devices is greater than an estimated average single-user-mode net goodput for the first and second wireless devices. The first and second wireless devices are included in the MU group based at least in part on the determination. A transmission is sent to the MU group. Net goodput corresponds to a number of bits that may be successfully transmitted divided by a sum of a time to transmit the number of bits and a time associated with network overhead.

Abstract translation: 执行MIMO无线通信的方法包括识别符合包括在多用户（MU）组中的第一无线设备，并且识别与第一无线设备不同的一个或多个候选无线设备的集合，其符合包含在 MU组。 该组包括第二无线设备。 确定第一和第二无线设备的估计的MU模式净功率输出大于第一和第二无线设备的估计的平均单用户模式净用户输入。 第一和第二无线设备至少部分地基于确定被包括在MU组中。 发送到MU组。 净功率对应于可以被成功发送的一些比特除以发送比特数的时间和与网络开销相关联的时间的和。

公开(公告)号：US09055458B2

公开(公告)日：2015-06-09

申请号：US13762338

申请日：2013-02-07

Applicant: QUALCOMM Incorporated

Inventor： Shu Du ,  Zhanfeng Jia ,  Ning Zhang ,  Chin-Hung Chen ,  James S. Cho ,  Rahul Tandra ,  Qinghai Gao

IPC: H04W24/02 ,  H04W28/00 ,  H04L1/00 ,  H04B7/04

CPC classification number: H04W24/02 ,  H04B7/0452 ,  H04L1/0007

Abstract: A method of providing aggregated MAC protocol data unit (AMPDU) duration control in a wireless communication device includes setting an AMPDU duration. Pass/fail statistics are collected for each MPDU of an AMPDU in a time window, W. A packet error rate (PER) difference is calculated between first and last sets of MPDUs for each AMPDU in the window. An average PER difference is calculated across all AMPDUs in the window. When the average PER difference is greater than a first threshold, then the AMPDU duration is decreased. When the difference is less than a second threshold, then the AMPDU duration is increased. When the difference is within the first and the second thresholds, then the method returns to the step of collecting for a next time window. The AMPDU duration can also be adjusted based on detected Doppler and line-of-sight transmissions.

Abstract translation: 在无线通信设备中提供聚合MAC协议数据单元（AMPDU）持续时间控制的方法包括设置AMPDU持续时间。 在时间窗口W中收集AMPDU的每个MPDU的通过/失败统计信息。在窗口中的每个AMPDU的第一组和最后一组MPDU之间计算分组错误率（PER）差异。 在窗口中的所有AMPDU之间计算平均PER差异。 当平均PER差大于第一阈值时，AMPDU持续时间减小。 当差值小于第二阈值时，AMPDU持续时间增加。 当差异在第一和第二阈值内时，该方法返回到下一个时间窗口的收集步骤。 AMPDU持续时间也可以根据检测到的多普勒和视线传输进行调整。