System and method for realizing long polling control of intelligent terminal to vehicle
An intelligent terminal and control system technology, applied in transmission systems, digital transmission systems, data exchange networks, etc., can solve problems such as communication interruption, and achieve the effect of reliable command issuance
Active Publication Date: 2019-03-19
SICHUAN CHANGHONG ELECTRIC CO LTD
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Problems solved by technology
As soon as one of the routers reclaims its port, the entire communication is lost
Method used
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[0039] HTTP is a typical example of a requestresponse pattern, that is, the client sends a request message to the server, and the server responds to the message. In older HTTP versions, each request would create a new client->server connection, send the request on this connection, and then receive the request. A great advantage of this mode is that it is very simple, easy to understand and program; it also has a big disadvantage that it is very inefficient, so Keep-Alive is proposed to solve the problem of low efficiency. The Keep-Alive (keep connection) function keeps the connection from the client to the server continuously effective. When there is a subsequent request to the server, the Keep-Alive function avoids establishing or re-establishing the connection.
[0040] This example is aimed at the http keep-alive mechanism, so that the server can send commands to the client in a timely and reliable manner.
[0041] System structure such as figure 1 As shown, it includes a...
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The invention relates to Internet of Vehicles and provides a system capable of achieving intelligent terminal's long-polling control to vehicles. The system is characterized in that an intelligent terminal transmits a remote control command to an intelligent terminal server, the intelligent terminal server forwards the remote control command to the vehicle end communication server, and the vehicle end communication server builds long connection with the vehicles and maintains one command queue for each vehicle; a new remote control command is added into each command queue during command receiving, and the remote control command is removed from the command queue during command transmitting; the vehicle end communication server constantly inquires whether the command queues are empty or not, if so, the long connection between the vehicle end communication server and the vehicles is maintained, and if not, command transmitting is performed; the vehicle end communication server sets long connection keeping time for a http request, the connection is not released when the time is in a time threshold, and the connection is released when the time exceeds the time threshold; one vehicle transmits the request again, and the vehicle end communication server performs overtime return on a vehicle end at the interval of a time period A when the vehicle end communication server receives the request. The system is suitable for the intelligent terminal's long-polling control to the vehicles.
Description
technical field [0001] The invention relates to the development of the Internet, the Internet of Vehicles, a service platform and a mobile terminal, in particular to a method for issuing timely and reliable commands to the vehicle-machine terminal under the environment of the mobile Internet. Background technique [0002] The network environment of Internet and mobile Internet in the prior art is as follows: [0003] After more than ten years of long-term development, the network infrastructure of the Internet has become relatively stable and mature, and the capabilities of PC terminals and operating systems have also reached a relatively high level. [0004] As for the mobile Internet, due to the continuous development of wireless telephone network base stations, 2G, 3G and 4G technologies, although its stability, bandwidth, resource allocation and other aspects are becoming more and more perfect, there are still many problems. In addition, due to the "mobile" nature of th...
Claims
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IPC IPC(8): H04L29/08H04L12/423
CPCH04L12/423H04L67/025H04L67/141H04L67/142H04L67/145
Inventor 魏劲超肖金华程思行江涛
Owner SICHUAN CHANGHONG ELECTRIC CO LTD