A long life cycle broadcast tree establishment method based on android WI-FI DIRECT mode

Abstract

The invention discloses an Android WI-FI (Wireless Fidelity) direct mode based long-life-cycle broadcast tree establishment method. The Android WI-FI direct mode based long-life-cycle broadcast tree establishment method comprises setting a broadcast threshold value T and enabling a system only to be added to a broadcast tree and not to participate in selecting broadcast tree forwarding nodes when the node power P is smaller than T; trying to establishing the WI-FI direct connection with a neighbor of every node through the node when P is not less than T; serving mutually interacted Go intent values as remaining power values P, enabling the high remaining power value to serve as a GO (Group Owner) and enabling the other remaining power values to serve as GCs (Group Client); recording the numbers of nodes through the GO and establishing a tree with the GO as the root and the other GCs as leaves, wherein the GO is responsible for the numbers of the nodes; continuing to try to establishing the new WI-FI direct with neighbor nodes which are not on the tree through the GO; broadcasting a message to the intermediate nodes and the leaves through the root node, wherein the message indicates that the root node is the root of the broadcast tree, the broadcast information can be forwarded through the root node, and then the broadcast information of the integral network can be sent to the root node first and then forwarded through the root node hop by hop according to the broadcast tree until the broadcast information arrives at all of the nodes. According to the Android WI-FI direct mode based long-life-cycle broadcast tree establishment method, the life circle of the established broadcast tree can be as long as possible.

Description

technical field

[0001] The invention relates to a Wi-Fi Direct mode based on the Andriod operating system, which is applicable to a method for establishing a long-life-cycle broadcast tree for mobile phones running an operating system above Andriod 4.0; The time when any node of the broadcast tree is disconnected due to battery exhaustion. Background technique

[0002] In recent years, smartphones have gained widespread popularity. There are mainly two mainstream operating systems on smart phones: Android operating system and IOS operating system. Among them, the IOS operating system is developed by Apple and is mainly used for Iphone series mobile phones, while the Android operating system is developed by Google. The running operating system covers Samsung and most domestic mobile phones such as Huawei and ZTE, as well as a large number of smart home systems such as TV etc. Most of these mobile phones are integrated with Wi-Fi chipsets, which can realize wireless data tr...

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