基于WI-FI热点技术的即时P2P语音通信系统的研究与设计

发布时间：2018-10-17 14:02

【摘要】：互联网在发展的过程中,从大众门户到个人客户端的演变,众多日益竞争的互联网客户端中,最让用户认可的是即时通信功能客户端。用户对即时通信的狂热激情加上商业刺激,使得互联网行业力捧各类即时通信软件,故即时通信已成为互联网行业研究和发展的热点领域。目前,随着Android智能手机的普及和移动网络传输速率的加快,使得国内的即时通信软件越来越受到用户的青睐。但是,当下的即时通信软件有一个共性,就是必须在服务器提供服务的条件下,才能正常工作。但在一些偏远地区,有可能没有通信网络的覆盖,特别是在突发的自然灾害情况下,有可能通信网络被破坏,此时,如何利用人们的智能手机,快速组建区域通信网络,在无需服务器为通信提供服务的条件下,仅依靠移动终端来实现通信,成为研究的热点问题之一。本文基于WiF、 Android等相关技术的探讨和分析,主要目的是实现WiFi热点的创建、搜索、连接,从而达到设备的组网,同时通过Android手机在多线程的管理下实现语音的采集、传输、播放,最终达到即时P2P语音通信,在此基础上,进一步实现多点语音通信。主要完成的工作如下； (1)设备的组网。在Android开发平台上实现WiFi热点的创建、节点搜索以及连接,实现了网络组建。 (2)即时语音通信的实现。实现了语音的采集、传输以及播放,把模拟语音信号转换成PCM数据流,通过UDP协议来完成数据发送与接收。 (3)多线程管理。为了保证语音通信的即时性,将语音的采集和发送与语音的接收和播放分别用独立线程来管理,让语音的采集、传输、播放能够有序的进行。 (4)多点入网。在实现即时P2P语音通信的基础上,在创建一个WiFi热点的条件下,实现多部移动终端连接同一个热点,组建一对多的网络,以此完成多点的短距离即时语音通信。
[Abstract]:In the process of the development of the Internet, the evolution from the public portal to the personal client, among the many increasingly competitive Internet clients, the instant messaging function client is the most recognized by the users. Users' enthusiasm for instant messaging and commercial stimulation make the Internet industry hold all kinds of instant messaging software, so instant messaging has become a hot area in the research and development of the Internet industry. At present, with the popularity of Android smart phones and the acceleration of mobile network transmission rate, the domestic instant messaging software is becoming more and more popular. However, the current instant messaging software has one thing in common, that is, the server must provide services to work properly. But in some remote areas, there may be no communication network coverage, especially in the case of sudden natural disasters, the communication network may be destroyed, at this time, how to use people's smartphones to quickly set up a regional communications network, Under the condition that no server is required to provide service for communication, it has become one of the hot issues to rely on mobile terminals to realize communication. Based on the discussion and analysis of WiF, Android and other related technologies, the main purpose of this paper is to realize the creation, search and connection of WiFi hot spots, so as to achieve the networking of the equipment, and at the same time to realize the acquisition, transmission and playback of voice through the Android mobile phone under the management of multi-thread. Finally, instant P2P voice communication is achieved, and on this basis, multipoint voice communication is further realized. The main work accomplished is as follows: (1) networking of equipment. The creation of WiFi hot spots, node search and connection are realized on Android development platform. (2) the realization of instant voice communication. The acquisition, transmission and playback of voice are realized. The analog speech signal is converted into PCM data stream, and the data is transmitted and received by UDP protocol. (3) Multi-thread management. In order to ensure the immediacy of voice communication, the acquisition and transmission of voice and the reception and play of voice are managed by independent threads respectively, so that the acquisition, transmission and playback of voice can be carried out in an orderly manner. (4) multipoint access to the network. Based on the realization of instant P2P voice communication, under the condition of creating a WiFi hot spot, it is realized that many mobile terminals connect the same hot spot and build a one-to-many network, so as to complete the multi-point short-range instant voice communication.
【学位授予单位】：华中师范大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN92

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