Abstract: A method includes obtaining, by a first network device comprising a processor, characteristic information from an encrypted packet received from a second network device based on a determination that the first network device cannot decrypt the encrypted packet. The first network device is free from having an internet protocol security (IPsec) security association (SA), and the second network device has the IPsec SA. The method also includes generating, by the first network device, generating an informational exchange packet when the first network device obtains, based on the characteristic information, an internet key exchange (IKE) SA corresponding to the characteristic information. The informational exchange packet instructs the second network device to delete the IPsec SA on the second network device. The method further includes sending, by the first network device, the informational exchange packet to the second network device.

Abstract: A method includes obtaining, by a first network device comprising a processor, characteristic information from an encrypted packet received from a second network device based on a determination that the first network device cannot decrypt the encrypted packet. The first network device is free from having an internet protocol security (IPsec) security association (SA), and the second network device has the IPsec SA. The method also includes generating, by the first network device, generating an informational exchange packet when the first network device obtains, based on the characteristic information, an internet key exchange (IKE) SA corresponding to the characteristic information. The informational exchange packet instructs the second network device to delete the IPsec SA on the second network device. The method further includes sending, by the first network device, the informational exchange packet to the second network device.

Abstract: A mutual awakening system and method thereof between a handheld device and a wireless communication module are disclosed. The system and method are applicable to the case that the wireless communication module is inserted and electrically coupled to the handheld device. The system includes a communication control line and a host control line which are used for electrically coupling the handheld device and the wireless communication module. When the handheld device is to transmit data, a second voltage signal of the communication control line is raised in value, which triggers a communication interrupt routine of the wireless communication module to awaken the wireless communication module from a sleep state. When the wireless communication module is to transmit data, a first voltage signal of the host control line is raised in value, which triggers a host interrupt routine of the handheld device to awaken the handheld device from a sleep state.

Abstract: A mutual awakening system and method thereof between a handheld device and a wireless communication module are disclosed. The system and method are applicable to the case that the wireless communication module is inserted and electrically coupled to the handheld device. The system includes a communication control line and a host control line which are used for electrically coupling the handheld device and the wireless communication module. When the handheld device is to transmit data, a second voltage signal of the communication control line is raised in value, which triggers a communication interrupt routine of the wireless communication module to awaken the wireless communication module from a sleep state. When the wireless communication module is to transmit data, a first voltage signal of the host control line is raised in value, which triggers a host interrupt routine of the handheld device to awaken the handheld device from a sleep state.