公开(公告)号：US09432251B2

公开(公告)日：2016-08-30

申请号：US13790631

申请日：2013-03-08

Applicant: QUALCOMM Incorporated

Inventor： Richard Newman ,  Purva R. Rajkotia

IPC: H04L12/26 ,  H04L12/24 ,  H04L1/18 ,  H04L1/22 ,  H04L1/00

CPC classification number: H04L41/0659 ,  H04L1/1809 ,  H04L1/1864 ,  H04L1/1877 ,  H04L1/22 ,  H04L2001/0096

Abstract: Protocol data units (PDUs) associated with a packet stream are transmitted with sequence numbers to support reordering and selective acknowledgement. A selective acknowledgement (SACK) message may be used to indicate at least one sequence number of a lost or corrupted PDU which was not properly received by the receiving device. Responsive to the SACK message, the lost or corrupted PDU is retransmitted via a different path of the network, different from the path used to transmit the original PDU. Lost or corrupted PDUs may not be retransmitted if the estimated retransmission delay is greater than a delay tolerance associated with the quality of service requirements of the application. Instead, a control message (i.e. “cut losses” message) may be transmitted to indicate that PDUs earlier than a particular sequence number will not be transmitted.

Abstract translation: 与分组流相关联的协议数据单元（PDU）以序列号发送以支持重新排序和选择性确认。 可以使用选择性确认（SACK）消息来指示由接收设备未正确接收的丢失或损坏的PDU的至少一个序列号。 响应于SACK消息，丢失或损坏的PDU经由网络的不同路径重传，不同于用于发送原始PDU的路径。 如果估计的重传延迟大于与应用程序的服务质量要求相关联的延迟容限，丢失或损坏的PDU可能不会被重新发送。 相反，可以发送控制消息（即“切断丢失”消息）以指示不会发送早于特定序列号的PDU。

公开(公告)号：US09008159B2

公开(公告)日：2015-04-14

申请号：US13738583

申请日：2013-01-10

Applicant: QUALCOMM Incorporated

Inventor： Hassan Afkhami ,  Purva R. Rajkotia ,  Manjunath Anandarama Krishnam

IPC: H04B1/38 ,  H04B3/46 ,  H04B3/54 ,  H04L27/26

CPC classification number: H04B3/46 ,  H04B3/542 ,  H04L27/2607 ,  H04L27/2646

Abstract: In some embodiments, a method includes receiving, at a receiver of a first device via a channel of a communication medium, multiple data transmissions. Each data transmission of the multiple data transmissions has a guard interval of multiple guard intervals, wherein the multiple guard intervals have different lengths. The method includes determining, based on signal characteristics of the multiple data transmissions, the data transmission from among the multiple data transmissions having a preferred physical data rate. The method includes setting a length of an adjusted guard interval for the channel for data communication from a transmitter of a second device to the receiver of the first device via the communication medium, to a length of the guard interval for the data transmission having the preferred physical data rate.

Abstract translation: 在一些实施例中，一种方法包括经由通信介质的信道在第一设备的接收机处接收多个数据传输。 多个数据传输的每个数据传输具有多个保护间隔的保护间隔，其中多个保护间隔具有不同的长度。 该方法包括基于多个数据传输的信号特性确定具有优选物理数据速率的多个数据传输中的数据传输。 该方法包括将用于数据通信的信道的经调整的保护间隔的长度从第二设备的发射机经由通信介质设置到第一设备的接收机到具有优选的数据传输的保护间隔的长度 物理数据速率。

公开(公告)号：US20140254649A1

公开(公告)日：2014-09-11

申请号：US13788811

申请日：2013-03-07

Applicant: QUALCOMM INCORPORATED

Inventor： Hassan Afkhami ,  Purva R. Rajkotia ,  Manjunath Anandarama Krishnam

IPC: H04L1/00

CPC classification number: H04L1/0002 ,  H04L1/0026 ,  H04L1/203 ,  H04L5/0007

Abstract: Rate adaptation in network communications can be determined, at least in part, by bit error rates through network communication channels. Bit error rates can provide an indication of channel conditions and can guide selection of data rate settings by network devices. Relatively good channel conditions can support relatively higher data rates while communication channels with relatively more noise and/or interference can support relatively lower data rates. Transmitted data can be coded with Forward Error Correction codes that can allow determination of bit error rates resulting from transmission. In one embodiment, bit error rates can guide carrier selection when data is transmitted with groups of two or more carriers such as with orthogonal frequency division multiplexing modulation.

Abstract translation: 可以至少部分地通过网络通信信道的比特错误率来确定网络通信中的速率适配。 位错误率可以提供信道条件的指示，并可以指导网络设备对数据速率设置的选择。 相对较好的信道条件可以支持相对较高的数据速率，而具有相对较多噪声和/或干扰的通信信道可以支持相对较低的数据速率。 传输的数据可以使用可以允许确定由传输产生的误码率的前向纠错码进行编码。 在一个实施例中，当使用诸如使用正交频分复用调制的两个或多个载波的组发送数据时，比特错误率可以指导载波选择。

公开(公告)号：US20140226676A1

公开(公告)日：2014-08-14

申请号：US13767712

申请日：2013-02-14

Applicant: QUALCOMM INCORPORATED

Inventor： Hassan Kaywan Afkhami ,  Purva R. Rajkotia

IPC: H04L12/56

CPC classification number: H04L47/6215 ,  H04L47/626

Abstract: Systems, methods and computer-readable media proportionally schedule packet transmission on a network. A node maintains a plurality of buffers configured to store packets to be transmitted by the node on a network. Each of the buffers may have a buffer priority and a buffer length. The node receives one or more channel access parameters. The channel access parameters may be determined in accordance with a link quality between the transmitting node and one or more receiving nodes. The node selects packet to be transmitted from a buffer based on the channel access parameters, the buffer priority of the buffer, the buffer length of the buffer and a deprivation factor associated with the packet.

Abstract translation: 系统，方法和计算机可读介质按比例在网络上调度分组传输。 节点维护多个缓冲器，其被配置为存储要由网络上的节点发送的分组。 每个缓冲器可以具有缓冲器优先级和缓冲器长度。 节点接收一个或多个信道接入参数。 可以根据发送节点和一个或多个接收节点之间的链路质量来确定信道接入参数。 该节点根据信道访问参数，缓冲器的缓冲区优先级，缓冲区的缓冲区长度以及与该数据包相关联的剥夺因素来选择要从缓冲器发送的数据包。

公开(公告)号：US20140192846A1

公开(公告)日：2014-07-10

申请号：US13738583

申请日：2013-01-10

Applicant: QUALCOMM INCORPORATED

Inventor： Hassan Afkhami ,  Purva R. Rajkotia ,  Manjunath Anandarama Krishnam

IPC: H04B3/46 ,  H04B1/38 ,  H04B3/54 ,  H04L27/26

CPC classification number: H04B3/46 ,  H04B3/542 ,  H04L27/2607 ,  H04L27/2646

Abstract: In some embodiments, a method includes receiving, at a receiver of a first device via a channel of a communication medium, multiple data transmissions. Each data transmission of the multiple data transmissions has a guard interval of multiple guard intervals, wherein the multiple guard intervals have different lengths. The method includes determining, based on signal characteristics of the multiple data transmissions, the data transmission from among the multiple data transmissions having a preferred physical data rate. The method includes setting a length of an adjusted guard interval for the channel for data communication from a transmitter of a second device to the receiver of the first device via the communication medium, to a length of the guard interval for the data transmission having the preferred physical data rate.

Abstract translation: 在一些实施例中，一种方法包括经由通信介质的信道在第一设备的接收机处接收多个数据传输。 多个数据传输的每个数据传输具有多个保护间隔的保护间隔，其中多个保护间隔具有不同的长度。 该方法包括基于多个数据传输的信号特性来确定具有优选物理数据速率的多个数据传输中的数据传输。 该方法包括将用于数据通信的信道的经调整的保护间隔的长度从第二设备的发射机经由通信介质设置到第一设备的接收机到具有优选的数据传输的保护间隔的长度 物理数据速率。