公开(公告)号：US09544767B2

公开(公告)日：2017-01-10

申请号：US14336976

申请日：2014-07-21

Applicant: Imagination Technologies Limited

Inventor： Chakra Parvathaneni

IPC: H04W12/04 ,  H04L29/06 ,  H04W84/12 ,  H04W92/10

CPC classification number: H04L63/0876 ,  H04L9/0891 ,  H04L9/3242 ,  H04L63/0428 ,  H04L63/061 ,  H04L63/162 ,  H04L2209/80 ,  H04W12/04 ,  H04W84/12 ,  H04W92/10

Abstract: In an aspect, a wireless communication between a transmitter and a receiver involves determining updated keys according to a key management process for MAC layer encryption. Such key is propagated to a transmitter MAC and though a receiver key management process to a receiver MAC. After a delay, transmitter MAC device begins using the updated key, instead of a prior key, for payload encryption. Receiver MAC continues to use the prior key until a packet that was accurately received fails a message integrity/authentication check. Then, the receiver MAC swaps in the updated key and continues to process received packets. The packet data that failed the message integrity check is discarded. Transmitter MAC retries the failed packet at a later time, and if the packet was accurately received and was encrypted by the transmitter MAC using the updated key, then the receiver will determine that the message is authentic and will receive it and acknowledge it.

Abstract translation: 在一方面，发射机和接收机之间的无线通信涉及根据用于MAC层加密的密钥管理过程确定更新的密钥。 这种密钥被传播到发射机MAC，并且通过接收机密钥管理过程传播到接收机MAC。 在延迟之后，发射机MAC设备开始使用更新的密钥而不是先前的密钥来进行有效负载加密。 接收者MAC继续使用先前的密钥，直到准确接收的数据包失败了消息完整性/认证检查。 然后，接收机MAC在更新的密钥中交换并继续处理接收到的分组。 丢弃消息完整性检查失败的数据包数据。 发射机MAC稍后重试失败的分组，并且如果分组被准确地接收并且由发射机MAC使用更新的密钥加密，则接收机将确定该消息是真实的并且将接收并且确认该消息。

公开(公告)号：US20160021066A1

公开(公告)日：2016-01-21

申请号：US14336976

申请日：2014-07-21

Applicant: IMAGINATION TECHNOLOGIES LIMITED

Inventor： Chakra Parvathaneni

IPC: H04L29/06

CPC classification number: H04L63/0876 ,  H04L9/0891 ,  H04L9/3242 ,  H04L63/0428 ,  H04L63/061 ,  H04L63/162 ,  H04L2209/80 ,  H04W12/04 ,  H04W84/12 ,  H04W92/10

Abstract: In an aspect, a wireless communication between a transmitter and a receiver involves determining updated keys according to a key management process for MAC layer encryption. Such key is propagated to a transmitter MAC and though a receiver key management process to a receiver MAC. After a delay, transmitter MAC device begins using the updated key, instead of a prior key, for payload encryption. Receiver MAC continues to use the prior key until a packet that was accurately received fails a message integrity/authentication check. Then, the receiver MAC swaps in the updated key and continues to process received packets. The packet data that failed the message integrity check is discarded. Transmitter MAC retries the failed packet at a later time, and if the packet was accurately received and was encrypted by the transmitter MAC using the updated key, then the receiver will determine that the message is authentic and will receive it and acknowledge it.

Abstract translation: 在一方面，发射机和接收机之间的无线通信涉及根据用于MAC层加密的密钥管理过程确定更新的密钥。 这种密钥被传播到发射机MAC，并且通过接收机密钥管理过程传播到接收机MAC。 在延迟之后，发射机MAC设备开始使用更新的密钥而不是先前的密钥来进行有效负载加密。 接收者MAC继续使用先前的密钥，直到准确接收的数据包失败了消息完整性/认证检查。 然后，接收机MAC在更新的密钥中交换并继续处理接收到的分组。 丢弃消息完整性检查失败的数据包数据。 发射机MAC稍后重试失败的分组，并且如果分组被准确地接收并且由发射机MAC使用更新的密钥加密，则接收机将确定该消息是真实的并且将接收并且确认该消息。

公开(公告)号：US09603052B2

公开(公告)日：2017-03-21

申请号：US14448120

申请日：2014-07-31

Applicant: Imagination Technologies Limited

Inventor： Chakra Parvathaneni

IPC: H04W4/00 ,  H04W28/06 ,  H04W72/04 ,  H04L1/00 ,  H04L1/18

CPC classification number: H04W28/06 ,  H04L1/00 ,  H04L1/1874 ,  H04L1/188 ,  H04W72/0406 ,  H04W72/085

Abstract: Wireless transmission is performed by storing, in a local memory, a header in association with reference(s) to memory locations in a separate, shared memory storing a payload for a given transmission. Each header can be associated with a QoS queue. When a selected payload is to be transmitted, a PHY preamble can begin, followed by a header from local memory, while a DMA transaction initiates to retrieve payload from the shared memory. Each retrieved portion of payload can include a link to a next location storing a next part of payload. A subsequent DMA is initiated for that part of the payload. A relatively fixed function circuit can initiate DMA and receive payload data; a programmable element can perform payload selection, for example. Multiple payloads can be aggregated (just before transmitting of a preamble) using header information stored in the fast local memory. Memory can be released after ACK of a corresponding payload.

公开(公告)号：US20170078290A1

公开(公告)日：2017-03-16

申请号：US15368001

申请日：2016-12-02

Applicant: Imagination Technologies Limited

Inventor： Chakra Parvathaneni

IPC: H04L29/06 ,  H04W12/04

CPC classification number: H04L63/0876 ,  H04L9/0891 ,  H04L9/3242 ,  H04L63/0428 ,  H04L63/061 ,  H04L63/162 ,  H04L2209/80 ,  H04W12/0013 ,  H04W12/04 ,  H04W84/12 ,  H04W92/10

Abstract: In an aspect, a wireless communication between a transmitter and a receiver involves determining updated keys according to a key management process for MAC layer encryption. Such key is propagated to a transmitter MAC and though a receiver key management process to a receiver MAC. After a delay, transmitter MAC device begins using the updated key, instead of a prior key, for payload encryption. Receiver MAC continues to use the prior key until a packet that was accurately received fails a message integrity/authentication check. Then, the receiver MAC swaps in the updated key and continues to process received packets. The packet data that failed the message integrity check is discarded. Transmitter MAC retries the failed packet at a later time, and if the packet was accurately received and was encrypted by the transmitter MAC using the updated key, then the receiver will determine that the message is authentic and will receive it and acknowledge it.

Abstract translation: 在一方面，发射机和接收机之间的无线通信涉及根据用于MAC层加密的密钥管理过程确定更新的密钥。 这种密钥被传播到发射机MAC，并且通过接收机密钥管理过程传播到接收机MAC。 在延迟之后，发射机MAC设备开始使用更新的密钥而不是先前的密钥来进行有效负载加密。 接收者MAC继续使用先前的密钥，直到准确接收的数据包失败了消息完整性/认证检查。 然后，接收机MAC在更新的密钥中交换并继续处理接收到的分组。 丢弃消息完整性检查失败的数据包数据。 发射机MAC稍后重试失败的分组，并且如果分组被准确地接收并且由发射机MAC使用更新的密钥加密，则接收机将确定该消息是真实的并且将接收并且确认该消息。

公开(公告)号：US20200274871A1

公开(公告)日：2020-08-27

申请号：US16819712

申请日：2020-03-16

Applicant: Imagination Technologies Limited

Inventor： Chakra Parvathaneni

IPC: H04L29/06 ,  H04L9/08 ,  H04L9/32 ,  H04W12/00 ,  H04W12/04

Abstract: In an aspect, a wireless communication between a transmitter and a receiver involves determining updated keys according to a key management process for MAC layer encryption. Such key is propagated to a transmitter MAC and though a receiver key management process to a receiver MAC. After a delay, transmitter MAC device begins using the updated key, instead of a prior key, for payload encryption. Receiver MAC continues to use the prior key until a packet that was accurately received fails a message integrity/authentication check. Then, the receiver MAC swaps in the updated key and continues to process received packets. The packet data that failed the message integrity check is discarded. Transmitter MAC retries the failed packet at a later time, and if the packet was accurately received and was encrypted by the transmitter MAC using the updated key, then the receiver will determine that the message is authentic and will receive it and acknowledge it.

公开(公告)号：US10057807B2

公开(公告)日：2018-08-21

申请号：US15424814

申请日：2017-02-04

Applicant: Imagination Technologies Limited

Inventor： Chakra Parvathaneni

IPC: H04W4/00 ,  H04W28/06 ,  H04W72/04 ,  H04W72/08

CPC classification number: H04W28/06 ,  H04L1/00 ,  H04L1/1874 ,  H04L1/188 ,  H04W72/0406 ,  H04W72/085

Abstract: Wireless transmission is performed by storing, in a local memory, a header in association with reference(s) to memory locations in a separate, shared memory storing a payload for a given transmission. Each header can be associated with a QoS queue. When a selected payload is to be transmitted, a PHY preamble can begin, followed by a header from local memory, while a DMA transaction initiates to retrieve payload from the shared memory. Each retrieved portion of payload can include a link to a next location storing a next part of payload. A subsequent DMA is initiated for that part of the payload. A relatively fixed function circuit can initiate DMA and receive payload data; a programmable element can perform payload selection, for example. Multiple payloads can be aggregated (just before transmitting of a preamble) using header information stored in the fast local memory. Memory can be released after ACK of a corresponding payload.

公开(公告)号：US20170150397A1

公开(公告)日：2017-05-25

申请号：US15424814

申请日：2017-02-04

Applicant: Imagination Technologies Limited

Inventor： Chakra Parvathaneni

IPC: H04W28/06 ,  H04W72/08 ,  H04W72/04

CPC classification number: H04W28/06 ,  H04L1/00 ,  H04L1/1874 ,  H04L1/188 ,  H04W72/0406 ,  H04W72/085

Abstract: Wireless transmission is performed by storing, in a local memory, a header in association with reference(s) to memory locations in a separate, shared memory storing a payload for a given transmission. Each header can be associated with a QoS queue. When a selected payload is to be transmitted, a PHY preamble can begin, followed by a header from local memory, while a DMA transaction initiates to retrieve payload from the shared memory. Each retrieved portion of payload can include a link to a next location storing a next part of payload. A subsequent DMA is initiated for that part of the payload. A relatively fixed function circuit can initiate DMA and receive payload data; a programmable element can perform payload selection, for example. Multiple payloads can be aggregated (just before transmitting of a preamble) using header information stored in the fast local memory. Memory can be released after ACK of a corresponding payload.

公开(公告)号：US20160037382A1

公开(公告)日：2016-02-04

申请号：US14448120

申请日：2014-07-31

Applicant: Imagination Technologies Limited

Inventor： Chakra Parvathaneni

IPC: H04W28/06 ,  H04W72/04

CPC classification number: H04W28/06 ,  H04L1/00 ,  H04L1/1874 ,  H04L1/188 ,  H04W72/0406 ,  H04W72/085

Abstract: Wireless transmission is performed by storing, in a local memory, a header in association with reference(s) to memory locations in a separate, shared memory storing a payload for a given transmission. Each header can be associated with a QoS queue. When a selected payload is to be transmitted, a PHY preamble can begin, followed by a header from local memory, while a DMA transaction initiates to retrieve payload from the shared memory. Each retrieved portion of payload can include a link to a next location storing a next part of payload. A subsequent DMA is initiated for that part of the payload. A relatively fixed function circuit can initiate DMA and receive payload data; a programmable element can perform payload selection, for example. Multiple payloads can be aggregated (just before transmitting of a preamble) using header information stored in the fast local memory. Memory can be released after ACK of a corresponding payload.

Abstract translation: 通过在本地存储器中存储与参考相关联的头部到存储用于给定传输的有效载荷的单独的共享存储器中的存储器位置来执行无线传输。 每个报头可以与QoS队列相关联。 当要发送所选择的有效载荷时，PHY前导码可以开始，随后是来自本地存储器的报头，而DMA事务开始从共享存储器检索有效负载。 有效载荷的每个检索部分可以包括到存储有效载荷的下一部分的下一个位置的链接。 为该部分有效载荷启动后续的DMA。 相对固定的功能电路可以启动DMA并接收有效载荷数据; 例如，可编程元件可以执行有效载荷选择。 可以使用存储在快速本地存储器中的标题信息来聚合多个有效载荷（恰好在发送前同步码之前）。 在相应的有效载荷的ACK之后可以释放内存。