The invention discloses a power line carrier communication system. The system can adaptively approach to an optimal frame length of an IPv6 packet slice in finite times, the complexity is low, the convergence can be carried out quickly to obtain the optimal frame length, and the IPv6 is efficiently supported; the system can generate a key according to personal information of a user, so that the key is unique and complex; and in a digital signal encryption and decryption process, bit operation is carried out on a plaintext digital signal, a user key and a first random digital signal to obtain a first ciphertext digital signal, meanwhile, the bit operation is carried out on the user key and the first random digital signal to obtain a second random digital signal, the bit operation is carried out on the obtained second random digital signal and the first ciphertext digital signal to obtain a second ciphertext digital signal, and finally reverse bit operation is carried out on the second ciphertext digital signal to obtain the original plaintext digital signal. The problem of poor confidentiality and security of the digital signal is solved, and the breaking difficulty is greatly increased.

Power line carrier communication system

The invention discloses an encrypted transmitting method for power carrier data. The method can be in finite approximation to an optimal frame length of an IPv6 packet segment self-adaptively, has relatively low complexity, can be converged quickly to obtain the optimal frame length and efficiently supports IPv6. A system can generate a key according to personal information of a user, so that the key has the uniqueness and the complexity; and in digital signal encryption and decryption processes, by performing a bit operation on a plaintext digital signal, a user key and a first random digital signal to obtain a first ciphertext digital signal, simultaneously performing the bit operation on the user key and the first random digital signal to obtain a second random digital signal and performing the bit operation on the second random digital signal and the first ciphertext digital signal to obtain a second ciphertext digital signal, and at last, performing a reverse bit operation on the second ciphertext digital signal to obtain an original plaintext digital signal, the problems of confidentiality and poor security of the digital signal are solved, and the cracking difficulty is increased greatly.

Encrypted transmitting method for power carrier data

A communication apparatus comprises: a frame coupling unit (13), a frame transmission unit (11) and a communication unit (12) that constitute a transmission means for executing a coupling process in which a plurality of fixed-cycle frames having the same transmission cycle are coupled to generate one or more communication frames and for transmitting the communication frames to a network; and a frame error rate calculation unit (20) that is an error counting means for counting communication errors occurring in the communication frames. When the count value of communication errors counted by the error counting means reaches a threshold value, the transmission means increases the number of communication frames to be generated in the coupling process.

Communication apparatus and frame transmission method

The present invention discloses a method for communicating with a power line. According to the method, the optimal frame length of IPv6 packet fragment is achieved adaptively in limited times, the method is less complex, the acquired optimal frame length can be rapidly shortened, and the method supports IPv6 efficiently. The system can generate a secret key according to personal information of a user, so that the secret key is unique and complex, and the digital signal has high confidentiality and security and is fairly hard to crack.

Method for communicating with power line

The present invention relates to an adaptive frame length method based on block acknowledgment in a wireless network. The adaptive frame length technology based on block acknowledgment is introduced into an ultra-high-speed wireless LAN, the current channel state is judged instantly through the information in the block acknowledgment, the frame length is adjusted adaptively to an optimal size, on the basis of the existing frame aggregation and block acknowledgment technology, the throughput and channel utilization efficiency are further improved, the adaptive module complexity is reduced, thus the channel has high flexibility and adaptivity, and thus the overall transmission performance of a wireless LAN is improved. The method has high flexibility and scalability and can be widely applied to various wireless communication systems.

Kang Guixia

Papers

Adaptive frame length method based on block acknowledgment in a wireless network