WO2020062530A1 - 一种基于无中心应用软件的通信方法及装置 - Google Patents

一种基于无中心应用软件的通信方法及装置 Download PDF

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WO2020062530A1
WO2020062530A1 PCT/CN2018/117468 CN2018117468W WO2020062530A1 WO 2020062530 A1 WO2020062530 A1 WO 2020062530A1 CN 2018117468 W CN2018117468 W CN 2018117468W WO 2020062530 A1 WO2020062530 A1 WO 2020062530A1
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user terminal
communication
broadcast message
app
permission level
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PCT/CN2018/117468
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English (en)
French (fr)
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李志华
刘坤
张元刚
刘愿
刘博�
孙厚清
冯健
王军
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北斗天地股份有限公司
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Priority to AU2018443385A priority Critical patent/AU2018443385B2/en
Publication of WO2020062530A1 publication Critical patent/WO2020062530A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/1066—Session management
    • H04L65/1101—Session protocols
    • H04L65/1104—Session initiation protocol [SIP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/61—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio
    • H04L65/611—Network streaming of media packets for supporting one-way streaming services, e.g. Internet radio for multicast or broadcast
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/65—Network streaming protocols, e.g. real-time transport protocol [RTP] or real-time control protocol [RTCP]
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/70—Media network packetisation
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L65/00—Network arrangements, protocols or services for supporting real-time applications in data packet communication
    • H04L65/60—Network streaming of media packets
    • H04L65/75—Media network packet handling
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/104—Peer-to-peer [P2P] networks
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L67/00—Network arrangements or protocols for supporting network services or applications
    • H04L67/01—Protocols
    • H04L67/10—Protocols in which an application is distributed across nodes in the network
    • H04L67/1095—Replication or mirroring of data, e.g. scheduling or transport for data synchronisation between network nodes
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W4/00—Services specially adapted for wireless communication networks; Facilities therefor
    • H04W4/06—Selective distribution of broadcast services, e.g. multimedia broadcast multicast service [MBMS]; Services to user groups; One-way selective calling services
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/18—Self-organising networks, e.g. ad-hoc networks or sensor networks

Definitions

  • the present disclosure relates to the field of mobile communications, and in particular, to a communication method and device based on a centerless application software.
  • a widely used mobile communication cellular network is to establish a communication link between a mobile terminal and a fixed base station.
  • the mobile terminal does not have a routing function.
  • the base station is responsible for routing and switching functions. That is, the base station acts as a gateway to access the wired network.
  • This feature also determines the limited scope of the cellular mobile network, which cannot be applied in special environments, temporary networking, emergency response, field exploration, and military battlefields.
  • the interaction between new application requirements and the evolution of existing technologies has promoted the development and maturity of new mobile ad hoc network communication technologies, overcoming the shortcomings of existing mobile cellular networks, and serving complex networking communication application scenarios and flexible network applications. Provided new technical support.
  • Mobile ad hoc networks are a special type of wireless network. Its formation does not depend on pre-existing network infrastructure, such as base stations or access points, but consists of several mobile nodes with wireless transceivers. Different from traditional wireless local area network, mobile ad hoc network is a non-center, multi-hop, self-organized peer-to-peer wireless communication network. Each node plays two roles at the same time, which is both the terminal host and the relay router. Since ad hoc networks have the characteristics of mobility, rapid establishment, autonomy, and peer-to-peer, they have a very broad application prospect.
  • the mobile application software APP developed based on the smart phone terminal has formed a good support for the development of the mobile Internet at the content level, but the existing traditional APP is a core server-based app.
  • the existence of the core server causes the server to be broken for some reason. After opening the link, the entire APP network will be paralyzed and unable to operate. This can not meet the basic requirements for running in an ad hoc network, it is too bloated and complicated, and it is insufficient in the flexibility of the networking.
  • the embodiments of the present disclosure provide a communication method and device based on a non-center application software, which can solve the problem of insufficient communication of the ad hoc network system.
  • the technical solution is as follows:
  • a communication method based on a centerless application software includes:
  • the first user terminal determines its own permission level
  • communication when performing a simplex voice intercom, communication may be performed in a private signaling broadcast manner, and media may be used in a multicast communication manner.
  • multiple audio media when performing point-to-multipoint communication, multiple audio media may be mixed at the temporary server and then forwarded to multiple user terminals.
  • messages and / or signaling can be sent and received based on the standard SIP protocol MESSAGE.
  • the user terminal integrates multiple map formats through a centerless APP, uses satellite positioning and / or indoor positioning to perform positioning, and broadcasts and synchronizes position information between user devices through a standard SIP protocol.
  • the new temporary server when the state of the temporary server changes, the new temporary server is re-determined and the data is synchronized.
  • a communication device including: a determination module, a transceiver module, a second determination module, and a communication processing module; the first communication module is configured to determine a permission level of a first user terminal
  • the transceiver module is configured to send a first broadcast message, and the first broadcast message carries the permission level information of the first user terminal; the transceiver module is further configured to receive a second broadcast sent by at least one second user terminal Message; the second broadcast message carries permission level information of the second user terminal; the second determining module is configured to determine a user terminal serving as the APP temporary server; and the communication processing module is configured to perform peer-to-peer
  • the call is negotiated based on the standard SIP protocol, RTP / RTCP is used for media transmission, and the MediaCodec hard codec scheme architecture is used for video encoding and decoding.
  • the above-mentioned communication processing module is further configured to: when performing voice simplex intercom, use a private signaling broadcast to communicate, and the media use multicast to communicate; and / or
  • multiple audio media are mixed to the temporary server and then forwarded to multiple user terminals; and / or
  • the above device further includes a positioning module, where the positioning module is configured to perform positioning using satellite positioning and / or indoor positioning.
  • the second determining module is further configured to re-determine a new temporary server and synchronize data when the state of the temporary server changes.
  • the communication method or device based on the non-center application software provided by the embodiment of the present disclosure is free from the shackles of the core server and matches the ad hoc network without the central node. The change of the status of each node will not cause a large impact on the entire network.
  • FIG. 1 is a schematic diagram of an application scenario according to an embodiment of the present disclosure
  • FIG. 2 is a flowchart of a communication method based on a centerless application software according to an embodiment of the present disclosure
  • FIG. 3 is a structural block diagram of a communication device according to an embodiment of the present disclosure.
  • FIG. 1 is a schematic diagram of an application scenario according to an embodiment of the present disclosure.
  • the communication system 100 is a complete mobile ad hoc network ecosystem.
  • a mobile ad hoc network is formed by a plurality of user terminals 101.
  • the centerless APP software 102 designed and developed by the embodiment of the present disclosure is installed on each user terminal 101.
  • When a user terminal starts and runs the APP software it will form a distributed mobile ad hoc network with other user terminals that start and run the same APP software within a certain range.
  • the user terminal 101 may be a mobile phone, a tablet computer, or other portable user equipment, and may also be referred to as a network node; the user terminal 101 may use an Android smart terminal as the centerless APP software platform of the communication system, It has human-computer interaction and user interface display functions.
  • each user terminal 101 in the communication system 100 can serve as both a server and a client. In a certain period of time, the system selects a user terminal as a temporary server based on certain conditions.
  • the multimedia communication in the communication system 100 is mainly divided into four modes: voice single call, video single call, voice intercom and voice conference; among which, voice single call and video single call are full-duplex point-to-point communication, and voice intercom is simplex point-to-point Communication, voice conference is full-duplex point-to-multipoint communication.
  • FIG. 2 is a flowchart of a communication method based on a centerless application software according to an embodiment of the present disclosure. As shown in FIG. 2, in combination with FIG. 1, the communication method includes the following steps;
  • the first user terminal determines its own permission level.
  • the user terminal 101 After the user terminal 101 is powered on, it automatically starts or starts the centerless APP 102 according to the user's instructions. It determines whether the user terminal belongs to a legitimate user of the communication system 100 according to the network IP of the user terminal 101. The login can be determined by logging in to the account of the centerless APP102. User terminal permissions. In some embodiments, a permission table is pre-stored in the user terminal 101, and the permission table records the correspondence between the account logged in to the centerless APP 102 and the permission level. The centerless APP102 software system can choose to activate the corresponding function point according to different permissions.
  • the first user terminal sends a first broadcast message, where the first broadcast message carries permission level information of the first user terminal;
  • the first broadcast message and the second broadcast message can be sent across the entire network through SIP signaling; user terminals in the ad hoc network system can send broadcast messages to broadcast their own information through broadcast messages, including when not limited to Privilege level information. At the same time, each user terminal can also receive broadcast messages sent by other user terminals.
  • Each user terminal in the communication system 100 may send a broadcast message to broadcast its own permission level information through the SIP signaling in the entire network, and determines that the user terminal with the highest authority is the temporary server. If there are multiple user terminals with the highest permission level and the same permission level, it can be determined that the first or last user terminal that sends out a broadcast message is a temporary server; in some embodiments, the temporary server can also be determined according to other rules.
  • point-to-point multimedia communication can include voice single call, video single call, etc .
  • SIP is a multimedia communication protocol developed by IETF (Internet Engineering Task Force), which is a text-based application layer control protocol. Used to create, modify, and release sessions for one or more participants. It is widely used in CS (Circuit Switched, Circuit Switched), NGN (Next Generation Network, Next Generation Network) and IMS (IP Multimedia Subsystem, IP Multimedia Subsystem) networks, which can support and apply to multimedia such as voice, video, data, etc. Services can also be applied to featured services such as presence (presence) and instant messaging (instant messaging).
  • RTP is a transmission protocol for multimedia data streams on the Ethernet (Internet).
  • RTP is defined to work in one-to-one or one-to-many transmission situations, and its purpose is to provide time information and achieve stream synchronization.
  • RTP usually uses UDP to transmit data, but RTP can also work on top of other protocols such as TCP or ATM.
  • TCP Transmission Control Protocol
  • RTCP Real-time transmission control protocol
  • each participant transmits RTCP packets periodically.
  • the RTCP packet contains statistical data such as the number of sent data packets and the number of lost data packets. Therefore, the server can use this information to dynamically change the transmission rate and even the payload type.
  • RTP and RTCP are used together. They can optimize the transmission efficiency with effective feedback and minimal overhead, so they are especially suitable for transmitting real-time data on the Internet.
  • the video part is implemented using the MediaCodec hard codec scheme architecture.
  • the MediaCodec class can be used to access Android's underlying multimedia codecs, such as encoder / decoder components. It is part of Android's underlying multimedia support infrastructure. Voice single call and video single call are full-duplex, point-to-point communication. Both parties can communicate in real time without affecting other nodes.
  • the communication method based on the non-center application software may further include: when performing voice simplex intercom, using a private signaling broadcast mode for communication, and the media using a multicast mode for communication.
  • Voice intercom is a simplex mode multimedia communication performed in the communication system 100.
  • the communication method based on the centerless application software may further include: when performing point-to-multipoint communication, a plurality of audio media is mixed with the temporary server and then forwarded to a plurality of user terminals.
  • point-to-multipoint communication can include voice conferences.
  • negotiation calls can also be based on the standard SIP protocol; RTP / RTCP is used for media transmission, and multiple audio media are mixed on the temporary server. .
  • the mixing can use the multi-point control unit (MCU) mode.
  • the N audio streams are first decoded according to their respective coding standards.
  • the decoded audio is preprocessed by noise reduction and then encoded.
  • the compilation is combined into an audio stream and sent to each other user terminal. Multiple audio media can be remixed on the temporary server and then forwarded.
  • the messages and signaling in the communication system 100 can be sent and received based on standard SIP protocol messages (MESSAGE), and the group sending function is implemented by multiple point-to-point single sending.
  • MESSAGE standard SIP protocol messages
  • the user terminal in the communication system 100 can integrate multiple map formats through a centerless APP, and can use the Beidou positioning method to synchronize the location information of other devices through a standard SIP protocol broadcast method.
  • GPS positioning or a combination of satellite positioning and indoor positioning can also be used for positioning.
  • the system compares the permissions table with all login accounts to determine that the highest permission is the new temporary server. At the same time, the relevant data will be synchronized through the ad hoc network. To the new server database.
  • the shackles of the core server is eliminated, and the ad hoc network without the center node is matched to form a flexible, stable, and reliable command communication scheduling APP system platform.
  • the following is a device embodiment of the present disclosure, which can be used to execute the method embodiment of the present disclosure.
  • the communication device 30 includes a first determination module 301, a transceiver module 302, a second determination module 303, and a communication processing module 304. among them:
  • the first communication module 301 is configured to determine the permission level of the first user terminal; the transceiver module 302 is configured to send a first broadcast message, and the first broadcast message carries the permission level information of the first user terminal; the transceiver module 302 is further configured to receive A second broadcast message sent by at least one second user terminal; the second broadcast message carries permission level information of the second user terminal; a second determining module 303 is configured to determine a user terminal serving as the APP temporary server; a communication processing module 304 is used for point-to-point multimedia communications, based on the standard SIP protocol for negotiation calls, RTP / RTCP for media transmission, and MediaCodec hard codec scheme architecture for video codec.
  • the communication processing module 304 is further configured to: when performing voice simplex intercom, use a private signaling broadcast to communicate, and the media communicate in a multicast manner; and / or
  • multiple audio media are mixed to the temporary server and then forwarded to multiple user terminals; and / or
  • the communication device 30 further includes a positioning module 305.
  • the positioning module 305 is configured to perform positioning using satellite positioning and / or indoor positioning.
  • the second determining module is further configured to re-determine a new temporary server and synchronize data when the state of the temporary server changes.
  • an embodiment of the present disclosure further provides a computer-readable storage medium, for example, a non-transitory computer-readable storage medium may be a read-only memory (English: Read Only Memory, ROM), Random Access Memory (English: Random Access Memory, RAM), CD-ROM, magnetic tape, floppy disk, and optical data storage device.
  • Computer instructions are stored on the storage medium, and are used to execute the communication method based on the non-center application software described in the embodiment corresponding to FIG. 2, which will not be repeated here.

Abstract

本公开提供一种基于无中心应用APP软件的通信方法及装置，涉及移动通信技术领域，能够解决自组织网络通信不灵活的问题。具体技术方案为：该方法包括：第一用户终端确定自身的权限级别；第一用户终端发送第一广播消息，第一广播消息携带第一用户终端的权限级别信息；接收至少一个第二用户终端发送的第二广播消息；第二广播消息携带第二用户终端的权限级别信息；确定作为APP临时服务端的用户终端；第一用户终端和第二用户终端作为APP的客户端在进行点对点的多媒体通信时，基于标准SIP协议进行协商呼叫，采用RTP/RTCP进行媒体传输，采用MediaCodec硬编解码方案架构进行视频编解码。本公开还提供种通信装置。

Description

一种基于无中心应用软件的通信方法及装置
本申请要求于2018年09月28日提交中国专利局、申请号为201811140718.5、申请名称为“一种基于无中心应用软件的通信方法及装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本公开涉及移动通信领域，尤其涉及一种基于无中心应用软件的通信方法及装置。
背景技术
目前广泛使用的移动通信蜂窝网络是移动终端和固定基站之间建立通信链路，移动终端不具备路由功能，基站负责路由和交换功能，即基站充当接入有线网络的网关。这一特点也决定了蜂窝移动网络的适用范围有限，它在特殊环境、临时组网、应急响应、野外探险、军事战场中无法得到应用。新的应用需求与现有技术演化相互作用，促使新的移动自组网通信技术的发展和成熟，克服现有移动蜂窝网络的缺陷，为复杂的组网通信应用场景和灵活的网络应用服务，提供了全新的技术支撑。
移动自组网是一种特殊的无线网络，它的组建不依赖于预先存在的网络基础设施，如基站或接入点，而是由若干个带有无线收发器的移动节点构成。与传统的无线局域网不同，移动自组网是一个无中心、多跳、自组织的对等式无线通信网络，每个节点同时充当两种角色，既是终端主机又是中继路由器。由于自组网具有移动性、快速搭建性、自治性和对等性等特点，因而具有非常广泛的应用前景。
基于智能手机终端开发的移动应用软件APP在内容层面对移动互联网的发展形成了良好的支撑，但现有的传统APP是基于核心服务器的APP，核心服务器的存在导致当服务器因某种原因而断开链接后，整个APP网络就会陷入瘫痪状态从而无法运行。这就无法满足在自组网中运行的基本要求，显得过于臃肿和复杂，且在组网的灵活性方面表现不足。
发明内容
本公开实施例提供一种基于无中心应用软件的通信方法及装置，能够解决自组网系统通信不够灵活的问题。所述技术方案如下：
根据本公开实施例的第一方面，提供一种基于无中心应用软件的通信方法，该方法包括：
第一用户终端确定自身的权限级别；
第一用户终端发送第一广播消息，所述第一广播消息携带所述第一用户终端的权限级别信息；
接收至少一个第二用户终端发送的第二广播消息；所述第二广播消息携带所述第二用户终端的权限级别信息；
确定作为所述APP临时服务端的用户终端；
在进行点对点的多媒体通信时，基于标准SIP协议进行协商呼叫，采用RTP/RTCP进行媒体传输，采用MediaCodec硬编解码方案架构进行视频编解码。
在一些实施例中，进行语音单工对讲时，可以采用私有信令广播的方式进行通信，媒体采用组播方式进行通信。
在一些实施例中，进行点对多点通信时，可以多个音频媒体在所述临时服务端进行混音处理后再转发至多个用户终端。
在一些实施例中，可以基于标准SIP协议MESSAGE进行消息和/或信令的收发。
在一些实施例中，所述用户终端通过无中心APP集成多种地图格式，采用卫星定位和/或室内定位的方式进行定位，通过标准SIP协议广播同步用户设备之间的位置信息。
在一些实施例中，当所述临时服务端发生状态的变更时，重新确定新的临时服务端并同步数据。
根据本公开实施例的第二方面，提供一种通信装置，包括：一确定模块、收发模块、第二确定模块和通信处理模块；所述第一通信模块用于确定第一用户终端的权限级别；所述收发模块用于发送第一广播消息，所述第一广播消息携带所述第一用户终端的权限级别信息；所述收发模块还用 于接收至少一个第二用户终端发送的第二广播消息；所述第二广播消息携带所述第二用户终端的权限级别信息；所述第二确定模块用于确定作为所述APP临时服务端的用户终端；所述通信处理模块用于，在进行点对点的多媒体通信时，基于标准SIP协议进行协商呼叫，采用RTP/RTCP进行媒体传输，采用MediaCodec硬编解码方案架构进行视频编解码。
在一些实施例中，上述通信处理模块还用于：在进行语音单工对讲时，采用私有信令广播的方式进行通信，媒体采用组播方式进行通信；和/或
在进行点对多点通信时，多个音频媒体在所述临时服务端进行混音处理后再转发至多个用户终端；和/或
基于标准SIP协议MESSAGE进行消息和/或信令的收发。
在一些实施例中，上述装置还包括定位模块，所述定位模块用于采用卫星定位和/或室内定位的方式进行定位。
在一些实施例中，上述第二确定模块还用于当所述临时服务端发生状态的变更时，重新确定新的临时服务端并同步数据。
通过本公开实施例提供的基于无中心应用软件的通信方法或装置，摆脱了核心服务器的束缚，匹配了无中心节点的自组网，各个节点的状态改变不会对整个网络造成大的影响形成一个灵活多变，稳定可靠的指挥通信调度APP系统平台。
应当理解的是，以上的一般描述和后文的细节描述仅是示例性和解释性的，并不能限制本公开。
附图说明
此处的附图被并入说明书中并构成本说明书的一部分，示出了符合本公开的实施例，并与说明书一起用于解释本公开的原理。
图1是本公开实施例的应用场景示意图；
图2是本公开实施例提供的一种基于无中心应用软件的通信方法流程图；
图3是本公开实施例提供的一种通信装置的结构框图。
具体实施方式
这里将详细地对示例性实施例进行说明，其示例表示在附图中。下面的描述涉及附图时，除非另有表示，不同附图中的相同数字表示相同或相似的要素。以下示例性实施例中所描述的实施方式并不代表与本公开相一致的所有实施方式。相反，它们仅是与如所附权利要求书中所详述的、本公开的一些方面相一致的装置和方法的例子。
图1为本公开实施例的应用场景示意图。如图1所示，通信系统100是一个完整的移动自组织网络生态系统，通过多部用户终端101组成了移动自组织网络。每部用户终端101上都安装了本公开实施例设计开发的无中心APP软件102。当一个用户终端启动并运行该APP软件后，会和周围一定范围内其它启动并运行了相同APP软件的用户终端组成分布式的移动自组织网络。在一些实施例中，用户终端101可以是手机、平板电脑或其他便携式用户设备，也可称为网络节点；用户终端101可以用安卓(Android)智能终端作为本通信系统的无中心APP软件平台，其具有人机交互和用户界面显示功能。
本公开实例设计开发的无中心APP平台系统软件，脱离了传统的APP需要核心服务器的模式，将客户端和服务端的功能进行整合处理。因此通信系统100中的各个用户终端101既可以作为服务端，也可以作为客户端。在某一时间段内，系统根据一定的条件选择一个用户终端作为临时服务端。
通信系统100中多媒体通信主要分为语音单呼、视频单呼、语音对讲和语音会议四种模式；其中语音单呼和视频单呼是全双工的点对点通信，语音对讲是单工点对点通信，语音会议是全双工的点对多点通信。
图2是本公开实施例提供的基于无中心应用软件的通信方法流程图。如图2所示，结合图1，该通信方法包括以下步骤；
201、第一用户终端确定自身的权限级别；
用户终端101上电后，自动启动或根据用户的指令启动无中心APP102，根据用户终端101的网络IP来甄别该用户终端是否属于通信系统100的合法用户，通过登录无中心APP102的账号可以确定该用户终端的权限。在一些实施例中，用户终端101中预存了权限表，该权限表中记 录了登录无中心APP102的账号与权限级别的对应关系。无中心APP102软件系统可以根据不同的权限来选择启动对应的功能点。
202、第一用户终端发送第一广播消息，所述第一广播消息携带所述第一用户终端的权限级别信息；
203、接收至少一个第二用户终端发送的第二广播消息；所述第二广播消息携带所述第二用户终端的权限级别信息；
其中，第一广播消息和第二广播消息都可以通过SIP信令在整个网络中发送；自组网系统中的用户终端都可以发送广播消息，通过广播消息来广播自己的信息，包括当不限于权限级别信息。同时，各用户终端也可以接收其他用户终端发送的广播消息。
204、确定作为所述APP临时服务端的用户终端
通信系统100中的各个用户终端可以通过SIP信令在整个网络中发送广播消息广播自己的权限级别信息，确定权限最高的用户终端为临时服务端。如果权限级别最高且权限级别相同用户终端有多个，则可以确定第一个或最后一个发出广播消息的用户终端为临时服务端；在一些实施例中也可以按照其他规则确定临时服务端。
205、在进行点对点的多媒体通信时，基于标准SIP(Session Initiation Protocol，会话初始协议)协议进行协商呼叫，采用RTP/RTCP进行媒体传输，采用MediaCodec硬编解码方案架构进行视频编解码；
其中，点对点的多媒体通信可以包括在语音单呼、视频单呼等；SIP是由IETF(Internet Engineering Task Force，因特网工程任务组)制定的多媒体通信协议，是一个基于文本的应用层控制协议，用于创建、修改和释放一个或多个参与者的会话。广泛应用于CS(Circuit Switched，电路交换)、NGN(Next Generation Network，下一代网络)以及IMS(IP Multimedia Subsystem，IP多媒体子系统)的网络中，可以支持并应用于语音、视频、数据等多媒体业务，同时也可以应用于Presence(呈现)、Instant Message(即时消息)等特色业务。RTP是用于以太网(Internet)上针对多媒体数据流的一种传输协议。RTP被定义为在一对一或一对多的传输情况下工作，其目的是提供时间信息和实现流同步。RTP通常使用UDP来传送数据，但RTP也可以在TCP或ATM等其他协议之上工作。当应用程序开始一个RTP 会话时将使用两个端口：一个给RTP，一个给RTCP。RTP本身并不能为按顺序传送数据包提供可靠的传送机制，也不提供流量控制或拥塞控制，它依靠RTCP提供这些服务。通常RTP算法并不作为一个独立的网络层来实现，而是作为应用程序代码的一部分实时传输控制协议RTCP。RTCP和RTP一起提供流量控制和拥塞控制服务。在RTP会话期间，各参与者周期性地传送RTCP包。RTCP包中含有已发送的数据包的数量、丢失的数据包的数量等统计资料，因此，服务器可以利用这些信息动态地改变传输速率，甚至改变有效载荷类型。RTP和RTCP配合使用，它们能以有效的反馈和最小的开销使传输效率最佳化，因而特别适合传送网上的实时数据。视频部分采用MediaCodec硬编解码方案架构实现。MediaCodec类可用于访问Android底层的多媒体编解码器，例如，编码器/解码器组件。它是Android底层多媒体支持基础架构的一部分。语音单呼和视频单呼是全双工、点对点的通信，双方可以实时交流，且不会对其他节点造成影响。
在一些实施例中，基于无中心应用软件的通信方法还可以包括：在进行语音单工对讲时，采用私有信令广播的方式进行通信，媒体采用组播方式进行通信。语音对讲是在通信系统100内进行的一种单工模式的多媒体通信。
在一些实施例中，基于无中心应用软件的通信方法还可以包括：在进行点对多点通信时，多个音频媒体在所述临时服务端进行混音处理后再转发至多个用户终端。
其中，点对多点通信可以包括语音会议，点对多点的通信中，也可以基于标准SIP协议进行协商呼叫；采用RTP/RTCP方式进行媒体传输，多个音频媒体在临时服务端进行混音。混音可以采用多点控制单元(multi-point controlling unit,简称MCU)模式，N路音频流首先按照各自的编码标准进行相应的解码，解码后的音频经过降噪等预处理后，再进行编码整编合并成一个音频流发送给其他各个用户终端。多个音频媒体可以在临时服务端进行混音处理后再转发。
在一些实施例中，通信系统100中消息与信令可以基于标准SIP协议消息(MESSAGE)进行收发，群发功能从实现上是多次的点对点单发来完成。
在一些实施例中，通信系统100中的用户终端通过无中心APP可以集 成多种地图格式，可以采用北斗定位的方式，通过标准SIP协议广播的方法同步其他设备的位置信息。在一些实施例中也可以采用GPS定位的方式，或者卫星定位和室内定位(如UWB基站定位等)相结合的方式进行定位。
在一些实施例中，如果临时服务端发生状态的变更时，系统会根据权限表与所有登陆账号对比，确定权限最高的为新的临时服务端，与此同时，相关数据会通过自组网同步到新的服务端的数据库中。
通过本公开实施例提供的基于无中心应用软件的通信方法；摆脱了核心服务器的束缚，匹配了无中心节点的自组网，形成一个灵活多变，稳定可靠的指挥通信调度APP系统平台。
基于上述图2对应的实施例中所描述的基于无中心应用软件的通信方法，下述为本公开装置实施例，可以用于执行本公开方法实施例。
本公开实施例提供一种基于无中心应用软件的通信装置，如图3所示，该通信装置30包括：第一确定模块301、收发模块302、第二确定模块303和通信处理模块304。其中：
第一通信模块301用于确定第一用户终端的权限级别；收发模块302用于发送第一广播消息，第一广播消息携带所述第一用户终端的权限级别信息；收发模块302还用于接收至少一个第二用户终端发送的第二广播消息；第二广播消息携带所述第二用户终端的权限级别信息；第二确定模块303用于确定作为所述APP临时服务端的用户终端；通信处理模块304用于在进行点对点的多媒体通信时，基于标准SIP协议进行协商呼叫，采用RTP/RTCP进行媒体传输，采用MediaCodec硬编解码方案架构进行视频编解码。
在一些实施例中，通信处理模块304还用于：在进行语音单工对讲时，采用私有信令广播的方式进行通信，媒体采用组播方式进行通信；和/或
在进行点对多点通信时，多个音频媒体在所述临时服务端进行混音处理后再转发至多个用户终端；和/或
基于标准SIP协议MESSAGE进行消息和/或信令的收发。
在一些实施例中通信装置30还包括定位模块305，定位模块305用于采用卫星定位和/或室内定位的方式进行定位。
在一些实施例中，第二确定模块还用于当所述临时服务端发生状态的变更时，重新确定新的临时服务端并同步数据。
基于上述图2对应的实施例中所描述的基于无中心应用软件的通信方法，本公开实施例还提供一种计算机可读存储介质，例如，非临时性计算机可读存储介质可以是只读存储器(英文：Read Only Memory，ROM)、随机存取存储器(英文：Random Access Memory，RAM)、CD-ROM、磁带、软盘和光数据存储装置等。该存储介质上存储有计算机指令，用于执行上述图2对应的实施例中所描述的基于无中心应用软件的通信方法，此处不再赘述。
本领域技术人员在考虑说明书及实践这里公开的公开后，将容易想到本公开的其它实施方案。例如：如使用C/C++和其他语言手段的基于自组网的PC端的无中心软件平台。这些平台在理念上与本申请实例一致，都是摆脱了传统的需要核心服务器进行转发处理的模式，从而将客户端和服务端进行融合处理，来达到无中心化。本申请旨在涵盖本公开的任何变型、用途或者适应性变化，这些变型、用途或者适应性变化遵循本公开的一般性原理并包括本公开未公开的本技术领域中的公知常识或惯用技术手段。说明书和实施例仅被视为示例性的，本公开的真正范围和精神由下面的权利要求指出。

Claims (10)

  1. 一种基于无中心应用APP软件的通信方法，其特征在于，所述方法包括：
    第一用户终端确定自身的权限级别；
    所述第一用户终端发送第一广播消息，所述第一广播消息携带所述第一用户终端的权限级别信息；
    接收至少一个第二用户终端发送的第二广播消息；所述第二广播消息携带所述第二用户终端的权限级别信息；
    确定作为所述APP临时服务端的用户终端；
    所述第一用户终端和所述第二用户终端作为所述APP的客户端在进行点对点的多媒体通信时，基于标准SIP协议进行协商呼叫，采用RTP/RTCP进行媒体传输，采用MediaCodec硬编解码方案架构进行视频编解码。
  2. 根据权利要求1所述的方法，其特征在于，所述方法还包括，在进行语音单工对讲时，采用私有信令广播的方式进行通信，媒体采用组播方式进行通信。
  3. 根据权利要求1所述的方法，其特征在于，所述方法还包括，在进行点对多点通信时，多个音频媒体在所述临时服务端进行混音处理后再转发至多个用户终端。
  4. 根据权利要求1所述的方法，所述方法还包括，基于标准SIP协议MESSAGE进行消息和/或信令的收发。
  5. 根据权利要求1所述的方法，所述方法还包括，所述用户终端通过无中心APP集成多种地图格式，采用卫星定位和/或室内定位的方式进行定位，通过标准SIP协议广播同步用户设备之间的位置信息。
  6. 根据权利要求1-5任一项所述的方法，其特征在于，当所述临时服务端发生状态的变更时，重新确定新的临时服务端并同步数据。
  7. 一种通信装置，其特征在于，包括：第一确定模块、收发模块、第二确定模块和通信处理模块；所述第一通信模块用于确定第一用户终端的权限级别；所述收发模块用于发送第一广播消息，所述第一广播消息携带所述第一用户终端的权限级别信息；所述收发模块还用于接收至少一个第 二用户终端发送的第二广播消息；所述第二广播消息携带所述第二用户终端的权限级别信息；所述第二确定模块用于确定作为所述APP临时服务端的用户终端；所述通信处理模块用于，在进行点对点的多媒体通信时，基于标准SIP协议进行协商呼叫，采用RTP/RTCP进行媒体传输，采用MediaCodec硬编解码方案架构进行视频编解码。
  8. 根据权利要求7所述的装置，其特征在于，所述通信处理模块还用于：在进行语音单工对讲时，采用私有信令广播的方式进行通信，媒体采用组播方式进行通信；和/或
    在进行点对多点通信时，多个音频媒体在所述临时服务端进行混音处理后再转发至多个用户终端；和/或
    基于标准SIP协议MESSAGE进行消息和/或信令的收发。
  9. 根据权利要求7所述的装置，其特征在于，所述装置还包括定位模块，所述定位模块用于采用卫星定位和/或室内定位的方式进行定位。
  10. 根据权利要求7-9任一项所述的装置，其特征在于，所述第二确定模块还用于当所述临时服务端发生状态的变更时，重新确定新的临时服务端并同步数据。
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