113 results about "Neighbour discovery" patented technology

Neighbour discovery in communications networks is made possible by a node sending beacon packets which include information regarding the node. The beacon packets are sent at pseudo-random time and on pseudo-random frequencies.

Methods and systems for reliable neighbor discovery in wireless ad hoc networks are provided herein. In one aspect, embodiments of the present invention provide methods and systems for analyzing the quality of a communication link. In embodiments, several factors affecting link quality may be incorporated in the analysis, and basic and / or complex statistical and / or probabilistic analysis may be used. In another aspect, embodiments of the present invention provide methods and systems for neighbor node discovery that adapt to network and / or node operating conditions and that dynamically maintain a neighbor node set at a given node according to these conditions. In a further aspect, embodiments of the present invention extend the utility of neighbor node discovery beyond the customary role of data routing support into the problem of deploying an ad hoc network by providing a display module for displaying node connectivity information.

In one embodiment, a method includes receiving a neighbor discovery message and a border routing message through an interface at a particular router. The interface communicates with a border network segment between first nodes routing with IPv6 using a first routing protocol and different second nodes routing using a different routing protocol. The messages are received from an alien router. The border routing message includes foreign routing data that indicates a route among the second nodes. If the alien router's interface on the border segment does not have a global IPv6 address, then a fictive IPv6 address is generated, which includes a global prefix of an IPv6 address for the particular router and an interface identifier associated with the alien router. The fictive IPv6 address and the foreign routing data are inserted into a domain scope external advertisement message that is sent to the first nodes.

The invention discloses an inter-mobile node communication system with position prediction based on a directional antenna. The system comprises a neighbor discovery module (1), an address analysis module (2), an address storage module (3), a position prediction module (4), a parameter setting module (5), a communication sending module (6), a communication receiving module (7) and a position correction module (8). Each mobile node in the system obtains position information of neighbor nodes through neighbor discovery operation. The node can perform position detection on surrounding neighbor nodes at regular intervals t and then communicate with predicted areas, and geographical position information of both parties are exchanged when the communication is successful; otherwise the node can automatically adopt a position prediction correction method for correction to perform the re-communication. In the system, a field angle of the directional antenna is used to perform regional definition to effectively reduce a radiofrequency coverage region during the communication of the nodes so as to reduce the energy consumption during the inter-mobile node communication, improve space usage rate, and increase the safety during the communication.

A content router, comprising a plurality of physical links to other nodes in an information centric network, a receiver coupled to the plurality of physical links configured to receive messages, a transmitter coupled to the plurality of physical links configured to transmit messages, and a service publishing and discovery (SPD) module comprising a processor and memory device coupled to the receiver and to the transmitter, wherein the SPD is configured to store status updates of the physical links, wherein the SPD is configured to determine a next hop and a number of hops to forward a received message based on a prefix in a name-based service discovery protocol name of a received message.

The invention discloses a method and a system for realizing a neighbor discovery proxy based on duplicate address detection (DAD). The method comprises the following steps that: an access layer switchboard detects a DAD process of a host machine node, establishes and stores address information, and uploads the address information to a convergence layer switchboard; the convergence layer switchboard stores the address information into an address information table; the host machine node sends a neighbor solicitation message to the convergence layer switchboard; the convergence layer switchboard inquires the address information table; and when the address information table comprises a target Internet protocol (IP) address of the neighbor solicitation message, the convergence layer switchboard sends a neighbor advertisement message to the host machine node. According to the technical scheme, neighbor discovery proxy equipment can judge whether the IP address is actually used, so that whether the IP address can be reached is determined, and communication between a request host machine node and a target host machine node is guaranteed.

The invention is directed to providing NDP mediation over an IP interworking VLL. ICMPv6 Neighbor Discovery and Inverse Neighbor Discovery messages are intercepted by provider edge (PE) devices to learn both IPv6 interface addresses and link-layer addresses of customer edge (CE) devices before forwarding the messages to the CE devices, and in some cases after altering the messages to make them more meaningful to the receiving CE devices. In this manner, the CE device interface addresses do not need to be communicated over the LDP control link, as in IPv4 ARP Mediation.

The invention discloses a simplified protocol stack routing and neighbor discovery method applied to a space-ground integrated network, which comprises the following steps: a protocol stack communication address is an identifier with the length of 16 bits, a routing table maintained by a routing subsystem is a three-level hash chain table, and a data packet routing mode is host routing, so that the routing efficiency is further improved. A data packet passes through a routing subsystem to obtain a next-hop node identifier and exit equipment, then the data packet is transmitted to a neighbor subsystem, a corresponding next-hop node Mac address is obtained in the neighbor subsystem according to the next-hop node identifier, maintenance and management are carried out on the neighbor subsystemthrough an identifier neighbor analysis protocol, and the whole network state is monitored. The method effectively solves the main challenges faced by the space-ground integrated network, such as topology dynamic change, node capability limitation, transmission time delay and the like, can improve the security of the backbone network and reduce the bandwidth resource and power consumption of thenetwork, and is suitable for a satellite network environment.

Many internet of things (IoT) are "sleepy" and thus occasionally go into a sleep mode. As described herein, nodes in a connected network of nodes may determine that other nodes in the network are sleepy. Further, nodes, such as endpoint devices and routers for example, may process packets in the network based on a reachability state of their neighboring nodes.

Methods and systems for discovery of a set of nodes (20, 30) in a network (165). The method comprisesselecting (S11) a node (20) amongst nodes in a group of nodes to be processed; andinstructing (S12) to implement a discovery procedure for the selected node. The procedure comprisesbroadcasting (S22) a neighbor discovery request from a node (20) currently selected on a shared transmission medium (1) of the network; andreceiving (S23) at the node (20) currently selected replies sent (S34) by neighbor nodes on the shared transmission medium and adding (S13) the neighbor nodes to the group of nodes to be processed; andrepeating (S14) the steps of selecting and instructing for other nodes (30) in the group of nodes to be processed, until all nodes of the set are discovered.

The invention discloses an intelligent neighbor discovery method and device for a directional antenna self-organizing network, and the method comprises the steps: constructing a reinforcement learning model through employing a receiving and transmitting mode and a scanning mode of a directional antenna; according to a Q value table in the reinforcement learning model, adopting an belonging-greedy algorithm to select a transmitting-receiving mode and a scanning direction of a node in the directional antenna self-organizing network; sending or intercepting a handshake packet according to the transceiving mode of the node, and carrying out three-step handshake interaction based on the handshake packet; detecting the conflict of handshake packets in the interaction process through the nodes, and determining a reward value in the reinforcement learning model according to conflict information and a receiving and transmitting mode; and updating a Q value table in the reinforcement learning model according to the reward value and a preset learning algorithm. According to the embodiment of the invention, the scanning strategy of the antenna is continuously adjusted through a learning mode, the conflict in the scanning process can be adaptively avoided, the link discovery can be accelerated when no conflict occurs in the handshake process, and the method is a fast and efficient neighbor discovery method in a directional antenna self-organizing network. Good application prospects are realized.

An automated neighbor discovery by a base station with the assistance of an access terminal are disclosed. An exemplary method includes receiving a first message from an access terminal based on detecting an identification signal by the access terminal from the first base station in a communication system. Determination whether the first base station is a known base station is then made. If the first base station is not known, a second message is transmitted to the access terminal requesting a network identification of the first base station. A third message from the access terminal is received in response to the second message including the requested network identification. A request for identification data is sent by the second base station to the first base station via a network link based on the network identification. Corresponding apparatus and other exemplary methods are also disclosed.