3 results about "Cognitive network" patented technology

The invention discloses a method for accessing and exiting frequency spectrum of a hybrid cognitive network by adopting the conventional wireless communication technology. Wireless communication adopts a multi-band mode and comprises an authorization network and a cognitive network; a special node is included in a cognitive user; centralized frequency spectrum perception and channel allocation and management are performed by using a public control channel and the special node when the cognitive user is accessed; and the method for exiting of the cognitive user adopts a distributed mode after a channel is re-occupied by the authorization network. By adopting centralized access allocation, distributed perception exiting, and a point-to-point communication method, and the functions of accessing and exiting are separated to ensure the cognitive working efficiency and the complexity of a cognitive network system. Moreover, each node shares same hardware resources, so the special node can be arbitrarily selected or replaced, and the comprehensive reliability of the system can be also improved.

This disclosure provides systems, methods and apparatus, including computer programs encoded on computer storage media, for wireless communication in a neighbor aware network (NAN). In one aspect, a first device of a wireless network (such as a NAN), in response to detecting a low power condition, may transmit a beacon including a power indicator. Other devices of the NAN may process the beacon and determine whether to assume a role of master or non-master sync in the NAN based on the power indicator. For example, a second device of the NAN may determine, based on power information of the second device, to assume the role of master or non-master sync in the NAN. To assume the role of master (or non-master sync), the second device may transmit a second beacon that includes a modified rank value.

The invention discloses a non-awareness network bridging method based on a wireless network card. The non-awareness network bridging method comprises the steps of: installing a driven network protocol corresponding to a promiscuous mode on the wireless network card of a windows system where a virtual machine is located; monitoring whether the virtual machine has data to be sent to the wireless network card or whether the wireless network card end receives the data to be sent to the virtual machine by using the driver; if monitoring that the virtual machine or the wireless network card has data to be sent through the driver, converting a source address of a sender and a network protocol according to a set condition, then sending the data to a receiver, establishing non-awareness network bridging through the protocol driver based on the wireless network card in the windows kernel, when the virtual machine carries out network transmission through the wireless network card of the host machine, not influencing the normal internet surfing function of the host machine, and achieving non-perception network data connection of the virtual machine.