WO2013189130A1

WO2013189130A1 - Communication system and communication method based on ad hoc network

Info

Publication number: WO2013189130A1
Application number: PCT/CN2012/081318
Authority: WO
Inventors: 席春艳; 宋波; 程晓峰
Original assignee: 中兴通讯股份有限公司
Priority date: 2012-06-18
Filing date: 2012-09-13
Publication date: 2013-12-27
Also published as: CN102752883A; CN102752883B

Abstract

A communication system and a communication method using an Ad Hoc network relate to the technical field of the Ad Hoc network. Each cluster head device in the system is configured to: exchange user information with other cluster head devices, broadcast the user information to a terminal device, receive a communication request initiated by the terminal device, determine a cluster head device corresponding to the communication request, establish a communication link with the determined cluster head device, so as to realize communication between the terminal device and a peer terminal device. The terminal device receives all user information broadcasted, selects a user for communication, sends to a cluster head device a communication request for communicating with the selected user, and communicates with the selected user according to an instruction of the cluster head device. Also disclosed is a communication method in a communication system based on an Ad Hoc network. The technical solution of the present application saves telephone service fees for a user, and is easy to operate.

Description

Communication system and communication method based on point-to-point network

Technical field

The present invention relates to the field of Ad Hoc (point-to-point) network technologies, and in particular, to a system and a communication method for communicating using an Ad Hoc network. Background technique

An Ad Hoc network is a multi-hop, centerless, self-organizing wireless network, also known as a multi-hop network, an infrastructure-free network, or an ad hoc network. The entire network has no fixed infrastructure, each node is mobile and can dynamically maintain contact with other nodes in any way. In such a network, due to the limited range of the wireless coverage of the terminal, two user terminals that cannot communicate directly can perform packet forwarding by means of other nodes. Each node is also a router that performs discovery and maintains routing to other nodes.

The Ad Hoc network is a special wireless mobile network. All nodes in the network have equal status and there is no need to set up any central control nodes. Nodes in the network not only have the functions required by ordinary mobile terminals, but also have packet forwarding capabilities. Compared with ordinary mobile networks and fixed networks, it has the following characteristics:

1) Network independence

The biggest difference between Ad Hoc networks and conventional communication networks is that they can quickly build a mobile communication network without any support from hardware infrastructure at any time and any place. Its establishment does not depend on existing network communication facilities and has certain independence.

2) Dynamically changing network topology

In an Ad Hoc network, the mobile host can move around the network at will. The movement of the host causes the link between the hosts to increase or disappear, and the relationship between the hosts constantly changes. In an ad hoc network, the host may also be a router at the same time. Therefore, the movement will cause the network topology to change constantly, and the way and speed of change are unpredictable.

3) Distributed characteristics of the network

There is no central control node in the Ad Hoc network, and the hosts are interconnected through a distributed protocol. Once the net Some or some of the nodes in the network have failed, and the remaining nodes are still working properly.

Ad Hoc networks generally have two structures: a planar structure and a hierarchical structure. In a planar structure, all nodes have equal status, so they can also be called a peer-to-peer structure. In the hierarchical structure, the network is divided into clusters. Each cluster consists of a cluster head and a number of cluster node members that form a higher level network. In a higher-level network, clusters can be clustered to form a higher-level network again, up to the highest level.

The uniqueness of the Ad Hoc network itself has made it an important place in the military field and its role in the civilian sector has gradually expanded. However, as a new type of network, there are still many problems, and new applications continue to pose new challenges to its research and development. With the deepening of research, Ad Hoc networks will have a broader prospect in the field of wireless communications.

Summary of the invention

The technical problem to be solved by the present invention is to provide a communication system and communication method based on a point-to-point network to reduce the high cost of the current telephone service.

In order to solve the above technical problem, the present invention discloses a communication system based on a point-to-point network, which includes two or more hierarchical point-to-point networks, and each hierarchical point-to-point network includes at least one cluster head device and a plurality of terminal devices, wherein:

The cluster head device in each hierarchical point-to-point network is configured to: perform user information interaction with the cluster head device in other hierarchical point-to-point networks, and perform user information under the cluster head device and other cluster head devices obtained by interaction. The user information is broadcasted to the terminal device under the cluster head device, and the communication request initiated by the terminal device in the hierarchical peer-to-peer network is received, the user information of the peer terminal device of the communication request is queried, and the corresponding cluster head is determined according to the user information. The device sends the communication request to the determined cluster head device, and establishes a communication link with the cluster head device to implement communication between the terminal device and the opposite terminal device in the hierarchical point-to-point network;

The terminal device is configured to: receive all user information broadcast by the cluster head device in the hierarchical peer-to-peer network, select a communication user from the received user information, and send and select the selected one to the cluster head device in the hierarchical point-to-point network. The communication request made by the user, and the command of the cluster head device in the hierarchical peer-to-peer network communicate with the selected user. Preferably, in the above system, the cluster head device is a server.

Preferably, in the above system, the user information includes at least terminal device identification information.

Preferably, in the above system, the cluster head device in each hierarchical point-to-point network is further configured to: when the user information under the cluster head device is updated, send the updated user information to other cluster head devices in real time, and When receiving updated user information sent by other cluster head devices, the updated user information is broadcasted to the terminal device under the cluster head device in real time. Change (PS) domain and circuit switched (CS) domain. The invention also discloses a communication method of a communication system based on a point-to-point network, comprising: performing user information interaction between cluster head devices in each hierarchical point-to-point network in a point-to-point network-based communication system, and each cluster head device will be the cluster head The user information under the device and the user information under other cluster head devices obtained by the interaction are broadcasted to the terminal device under the cluster head device;

After receiving the user information broadcasted by the cluster head device in the hierarchical point-to-point network, the first terminal device in the point-to-point network-based communication system selects the second terminal device to be communicated from the received user information to the hierarchical peer-to-peer network. The cluster head device sends a communication request with the selected second terminal device;

The cluster head device in the hierarchical peer-to-peer network in the communication system based on the peer-to-peer network receives the communication request initiated by the terminal device in the hierarchical point-to-point network, queries the user information of the second terminal device of the communication request, and determines the corresponding information according to the user information. a cluster head device, sending the communication request to the determined cluster head device, and establishing a communication link with the cluster head device;

The first terminal device communicates with the second terminal device.

Preferably, in the above method, the cluster head device is a server.

Preferably, in the above method, the user information includes at least terminal device identification information.

Preferably, in the above method, when the user information under a certain cluster head device is updated, the cluster head device sends the updated user information to other cluster head devices in real time;

When the other cluster head device receives the updated user information, the updated user information is broadcasted to the terminal device under the cluster head device in real time. Preferably, in the foregoing method, the communication between the first terminal device and the second terminal device includes a packet switched (PS) domain and a circuit switched (CS) domain.

A cluster head device in a peer-to-peer network is applied to two or more hierarchical point-to-point networks, and each hierarchical point-to-point network includes at least one cluster head device and a plurality of terminal devices.

The cluster head device in the peer network is configured to: perform user information interaction with the cluster head device in the hierarchical point-to-point network, and the cluster head device in the other hierarchical point-to-point network, and the user under the cluster head device User information of other cluster head devices obtained by information and interaction is broadcasted to the terminal device under the cluster head device, and a communication request initiated by the terminal device in the hierarchical peer-to-peer network is received, and the user of the peer terminal device that queries the communication request is queried. And determining, according to the user information, the corresponding cluster head device, sending the communication request to the determined cluster head device, and establishing communication with the cluster head device. Preferably, the cluster head device is a server.

Preferably, the cluster head device in the peer-to-peer network is further configured to: when the user information under the cluster head device is updated, send the updated user information to other cluster head devices in real time, and receive other clusters. When the updated user information is sent by the head device, the updated user information is broadcasted to the terminal device under the cluster head device in real time.

The technical solution of the present application provides a communication scheme based on the Ad Hoc network, which saves the user the cost of the telephone service, and the operation is simple and easy. BRIEF abstract

FIG. 1 is a schematic structural diagram of a communication system based on an Ad Hoc network according to an embodiment of the present invention; FIG. 2 is a specific flowchart of a client-to-server interaction according to an embodiment of the present invention. Preferred embodiment of the invention

The technical solution of the present invention will be further described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments of the present application may be combined with each other arbitrarily. Example 1

The applicant found that the current telephone service costs are high, and if the data phone for the PS service is used, it can save a lot of money. However, the current domestic 3G network is very imperfect, and frequent 2G-3G switching is likely to cause data phone instability. There are also mobile phones that use peer-to-peer communication with computer servers via Ad Hoc technology. However, this kind of communication transmits data services, not call services, and usually the two parties set up a fixed IP to communicate, which is troublesome to set up. Especially when the PC's server IP is constantly updated dynamically. More importantly, this type of communication cannot meet peer-to-peer communication between servers. In this hierarchical structure, if the same PC accesses multiple mobile terminals, it is easy to cause conflict between the two parties because the IP address is preset.

Based on the above findings, the applicant proposed a dynamic IP allocation, communication system based on Ad Hoc network. The system includes more than two hierarchical point-to-point networks, and each hierarchical point-to-point network includes at least one cluster head device and a plurality of terminal devices.

The cluster head device in each hierarchical point-to-point network exchanges user information with the cluster head device in other hierarchical point-to-point networks, and the user information under the cluster head device and the users under other cluster head devices obtained through interaction The information is broadcasted to the terminal device under the cluster head device, and the communication request initiated by the terminal device in the hierarchical peer-to-peer network is received, the user information of the peer terminal device of the communication request is queried, and the corresponding cluster head device is determined according to the user information. Sending the communication request to the determined cluster head device, and establishing a communication link with the cluster head device to implement communication between the terminal device and the opposite terminal device in the hierarchical point-to-point network;

The terminal device receives all the user information broadcasted by the cluster head device in the hierarchical peer-to-peer network, selects the user information of the peer terminal device of the communication from the received user information, and sends the information to the cluster head device in the hierarchical point-to-point network. The selected terminal device performs a communication request and communicates with the selected user according to the instructions of the cluster head device in the hierarchical peer-to-peer network.

The above cluster head device can generally be an Ad Hoc server. The user information includes at least terminal device identification information.

In addition, in the actual application process, the users in each hierarchical Ad Hoc network are dynamically updated. Therefore, the cluster head device in each hierarchical point-to-point network in the above system will also update the user information under the cluster head device. The updated user information is sent to other cluster head devices in real time, and the updated user information is broadcasted in real time when receiving updated user information sent by other cluster head devices. Give the terminal device under the cluster head device.

It should also be noted that the communication between the terminal device and the opposite terminal device in the above system includes a packet switching (PS) domain and a circuit switched (CS) domain.

The communication system composed of two hierarchical Ad Hoc networks is taken as an example to explain the working principle of the communication system in detail. Specifically, the communication system architecture provided by this embodiment is shown in FIG. 1. The entire network architecture is a simple network structure, using a hierarchical network. Server A and Server B are two servers of the Ad Hoc network. These two servers are equal in status and can be used as cluster head devices.

For example, an Ad Hoc server is set up between the two companies. The actual application is not limited to two servers, and there are many, and connections can be established directly according to business needs. Mobile phone A1 (ie terminal device A1), mobile phone A2... mobile phone AN is the peer node under server A, forming a hierarchical Ad Hoc network. Mobile B1 (ie terminal device B2), mobile phone B2... mobile phone BN is the peer node under server B. It forms another hierarchical Ad Hoc network. If the mobile phone A1 wants to contact A2, it can be forwarded to A2 through server A. The mobile phone A1 should contact B1 to forward it to server B through server A, and then forward it to mobile phone Bl through server B.

Server A and Server B function as cluster head devices and include the following functions:

The broadcast and resource allocation functions, that is, sending broadcast messages, notify the terminal device (such as a mobile phone) under the server to exist, allocate relevant IP resources, and function as a DHCP server. After the user is successfully established, the user is allocated resources related to the communication, and user information (such as terminal device identification information).

The authentication function is to configure user information when the user attempts to access, and to authenticate the user and allow access.

The communication function mainly refers to information data that interacts with users of terminal devices (such as mobile phones), including voice data, signaling messages, and the like.

The routing function mainly forwards user information to other peer ad hoc servers and functions as a route. It is also routed to the peer Ad Hoc server to obtain the relevant user information under the peer Ad Hoc server.

The database function mainly includes two aspects, an authentication database, which is mainly responsible for the legality of the authentication user, and user rights. The user database is mainly responsible for storing the user who passes the authentication, and the data may be from the user data of the group class (ie, the Ad Hoc server) and other group classes (ie, The data of other Ad Hoc servers, where the data of other groups comes from the routing interaction information between the Ad Hoc servers. When the user database in other servers changes, the Ad Hoc server can be notified in time to update, and after the user data of the server changes, the terminal device connected with him is also notified regularly, so that the Ad Hoc service and the mobile phone are You can get the latest online mobile phone user information, and connected mobile phone users can communicate with other users.

The terminal equipment is mainly responsible for the following services:

An access processing mainly refers to Ad Hoc server search, Ad Hoc server authentication, and Ad Hoc server login function.

The second interface display, mainly the interface display of the upper APP application, displays some characteristic information of the Ad Hoc server, such as server name, group name, personal information, QOS, contactable user group (ie, the Ad Hoc server broadcasts to the terminal device) All user information) and so on.

The communication process is mainly the function of the client (ie, the terminal device) to make calls with other clients (ie other terminal devices) via the Ad Hoc server and the basic communication process of the server. There are other IM softwares on the market, such as Mi Chat on the mobile phone, WeChat, but all are PS (Packet Switch) domains. The communication process of the technical solution of the present application includes a CS (Circuit Switch) domain. Among them, the communication process referred to in this paper includes dynamically receiving the broadcast message of the server, updating its own UI state information, and sending relevant messages to the server when the user status changes.

Example 2

This embodiment introduces a communication method of a communication system based on a point-to-point network, including: performing user information interaction between cluster head devices in each hierarchical point-to-point network in a point-to-point network-based communication system, and each cluster head device will use the cluster head device The user information under the other cluster head device obtained by the user information and the interaction is broadcasted to the terminal device under the cluster head device;

The cluster head device in the hierarchical point-to-point network in the communication system based on the peer-to-peer network receives this rating a communication request initiated by the terminal device in the peer-to-peer network, querying the user information of the second terminal device of the communication request, determining a corresponding cluster head device according to the user information, and transmitting the communication request to the determined cluster head device, and the The cluster head device establishes a communication link;

The first terminal device communicates with the second terminal device.

The cluster head device is a server. The user information includes at least terminal device identification information.

In addition, when the user information under a certain cluster head device is updated, the cluster head device also sends the updated user information to other cluster head devices in real time;

When the other cluster head device receives the updated user information, the updated user information is broadcasted to the terminal device under the cluster head device in real time.

It should be noted that the communication between the first terminal device and the second terminal device includes a packet switching (PS) domain and a circuit switched (CS) domain.

The main process of implementing the interaction between the client (ie, the terminal device) and the server (ie, the cluster head device) in the application is described below with reference to FIG. 2:

Step 1: The client searches for the Ad Hoc server.

The client searches for available Ad Hoc servers according to certain conditions. These conditions can be distance, hop count, name, etc. The setting of the condition can be set by the user, and the terminal device (for example, mobile phone terminal) interface processing module is implemented. . For the searched server, the list is displayed to the user for use by the user.

Step 2: The client logs in to the Ad Hoc server.

The user selects one of the searched Ad Hoc servers to log in. During the login process, the server authenticates the mobile phone user. The client identifies if the server is a valid server available. The server authenticates whether the client is a valid client. The authentication method can be based on the agreement between the mobile phone and the server. It can be the account obtained by the user from the operator, directly registered according to the account information, or any other authentication method.

Step 3: The client obtains an online user contact;

In this process, the mobile phone user sends a request to the server to obtain an online user contact. After receiving the request, the server sends the information of the mobile phone user who is online at this time to the mobile phone. After receiving the mobile phone, the mobile phone is processed by the interface processing module and displayed on the interface. User use. At the same time, the server will put some configuration letters of the user. The message is sent to the terminal device.

Step 4: The client communicates with the peer client.

The mobile phone selects an online user to make a call according to the requirement. After receiving the call request, the server forwards and finds the called party. At this time, if the called user is also directly transferred to the called party under the network to which the same Ad Hoc server belongs. After the call is called, the called party can respond to the normal call process. Otherwise, it needs to be routed to the Ad Hoc server to which the called party belongs, and the called party will be called by the Ad Hoc server to which the called party belongs.

One of ordinary skill in the art will appreciate that all or a portion of the above steps may be accomplished by a program instructing the associated hardware, such as a read-only memory, a magnetic disk, or an optical disk. Alternatively, all or part of the steps of the above embodiments may also be implemented using one or more integrated circuits. Correspondingly, each module/unit in the above embodiment may be implemented in the form of hardware or in the form of a software function module. This application is not limited to any specific form of combination of hardware and software.

The above description is only a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Industrial applicability

The technical solution of the present application provides a communication scheme based on the Ad Hoc network, which saves the user the cost of the telephone service, and the operation is simple and easy.

Claims

Claim

A communication system based on a point-to-point network, the system comprising two or more hierarchical point-to-point networks, each hierarchical point-to-point network comprising at least one cluster head device and a plurality of terminal devices, wherein: cluster heads in each hierarchical point-to-point network The device is configured to: perform user information interaction with the cluster head device in the other hierarchical peer-to-peer network, and broadcast the user information under the cluster head device and the user information under other cluster head devices obtained by the interaction to the cluster head device. The terminal device, and the communication request initiated by the terminal device in the hierarchical peer-to-peer network, querying the user information of the peer terminal device of the communication request, determining the corresponding cluster head device according to the user information, and sending the communication request to the Determining a cluster head device, and establishing a communication link with the cluster head device to implement communication between the terminal device and the peer terminal device in the hierarchical point-to-point network;

The terminal device is configured to: receive all user information broadcast by the cluster head device in the hierarchical peer-to-peer network, select a communication user from the received user information, and send and select the selected one to the cluster head device in the hierarchical point-to-point network. The communication request made by the user, and the command of the cluster head device in the hierarchical peer-to-peer network communicate with the selected user.

2. The system of claim 1 wherein

The cluster head device is a server.

3. The system of claim 1 wherein

The user information includes at least terminal device identification information.

4. The system according to any one of claims 1 to 3, wherein

The cluster head device in each hierarchical point-to-point network is further configured to: when the user information under the cluster head device is updated, the updated user information is sent to other cluster head devices in real time, and is sent by other cluster head devices. When the updated user information is updated, the updated user information is broadcasted to the terminal device under the cluster head device in real time.

5. The system of claim 4, wherein

Communication between the terminal device and the peer terminal device includes packet switching (PS) domain and circuit switching

(CS) domain.

6. A communication method for a communication system based on a point-to-point network, the method comprising: performing user information interaction between cluster head devices in each hierarchical point-to-point network in a point-to-point network-based communication system, and each cluster head device will use the cluster head device The user information under the other cluster head device obtained by the user information and the interaction is broadcasted to the terminal device under the cluster head device;

The first terminal device communicates with the second terminal device.

7. The method of claim 6, wherein

The cluster head device is a server.

8. The method of claim 6, wherein

The method according to any one of claims 6 to 8, wherein the method further comprises: when the user information under a cluster head device is updated, the cluster head device sends the updated user information to the real-time information in real time. Other cluster head equipment;

10. The method of claim 9, wherein

The communication between the first terminal device and the second terminal device includes a packet switched (PS) domain and a circuit switched (CS) domain.

11. A cluster head device in a peer-to-peer network, comprising two or more hierarchical point-to-point networks, each hierarchical point-to-point network including at least one cluster head device and a plurality of terminal devices,

The cluster head device in the peer network is configured to: perform user information interaction with the cluster head device in the hierarchical point-to-point network, and the cluster head device in the other hierarchical point-to-point network, and the user under the cluster head device User information of other cluster head devices obtained by information and interaction is broadcasted to the terminal device under the cluster head device, and a communication request initiated by the terminal device in the hierarchical peer-to-peer network is received, and the user of the peer terminal device that queries the communication request is queried. Information, determining a corresponding cluster head device according to the user information, sending the communication request to the determined cluster head device, and establishing communication with the cluster head device

12. The cluster head device in a peer-to-peer network according to claim 11, wherein the cluster head device is a server.

13. The cluster head device in a peer-to-peer network according to claim 11, wherein

The cluster head device in the peer-to-peer network is further configured to: when the user information under the cluster head device is updated, send the updated user information to other cluster head devices in real time, and send the other cluster head devices after receiving the information. When the updated user information is updated, the updated user information is broadcasted to the terminal device under the cluster head device in real time.