Data routing method for mobile opportunistic network based on delivery rate constraint

Abstract

The disclosure relates to a data routing method for a mobile opportunistic network based on delivery rate constraint. The data routing method for the mobile opportunistic network based on the deliveryrate constraint ensures the delivery rate requirements of a data packet through cooperation of a plurality of nodes; data broadcast is carried out only when the surrounding neighbor nodes can complete the certain data delivery rate requirements; otherwise, a better neighbor node met in the future is waited to reduce the times of the data broadcast, thereby prolonging the network lifetime. Throughsetting that only one node has the ability to forward the data again after each time of the data broadcast, the number of packet copies is effectively limited, and the energy consumption is saved; meanwhile, the influence of wireless channel quality on data reception rate is considered after each time of the data broadcast; the next hop forwarding node is selected from the neighbor nodes that successfully receive the packet, therefore, the number of data retransmission times can be effectively reduced; and the advantage of improving the delivery rate brought by all the nodes that receive thepackets is fully used to prolong the lifetime of the network.

Description

technical field [0001] The present disclosure relates to the fields of opportunistic networks and mobile opportunistic networks, in particular, a routing method for transmitting data to a specific geographical area in a mobile-oriented opportunistic network under the condition of satisfying delivery rate constraints. Background technique [0002] At present, there are many challenges to realize the efficient data transmission mechanism of mobile opportunistic networks, mainly including: (for simplicity, users, nodes and mobile smart devices will be used interchangeably in the following) First, the energy of nodes (that is, the battery power of devices) is often limited , and it needs to consume a certain amount of energy when sending and receiving data, which limits its data transmission capability and affects the lifetime of the entire network. Secondly, the way a device node transmits data is wireless broadcasting, which often faces changing wireless channel quality, which...

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Problems solved by technology

Among them, the data routing method based on optimization first evaluates the surrounding neighbor nodes and selects the optimal relay node according to a certain standard and transmits the data to the node. The optimization standard of this method often has certain limitations, and because The mobility of nodes can easily lead to the shortcomings of local optimality and global poorness; the method based on energy balance often only considers the remaining energy of the current node and surrounding neighbor nodes, and generally selects the node with more remaining energy in the neighbor nodes, while Without considering the mobility of nodes and the instability of wireless channels, it is easy to cause the data routing method to fall into local optimum and shorten the network lifetime; while the data routing method based on social perception is based on the social measurement of nodes, and the nodes are directed to social A node with a high metric value forwards in order to meet the target node as soon as possible, but the energy consumption of a node with a high social metric value is often relatively large, which limits the practicability of the method

It can be seen that the current data routing methods for mobile opportunistic networks have disadvantages such as unbalanced energy consumption, no guarantee of data delivery rate, and short network lifetime.

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