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Transportation means and roadside device communication method and communication system

A technology of a vehicle and a communication method, which is applied in the field of communication methods and communication systems for vehicles and roadside equipment, to achieve the effects of optimizing the communication method and communication system and facilitating the establishment of communication connections

Inactive Publication Date: 2012-12-19
SIEMENS AG
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  • Abstract
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Problems solved by technology

Although this method will bring some program delay, but this delay is tolerable, because the time interval between two consecutive stations is usually only a few minutes

Method used

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  • Transportation means and roadside device communication method and communication system
  • Transportation means and roadside device communication method and communication system
  • Transportation means and roadside device communication method and communication system

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Embodiment Construction

[0049] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and examples.

[0050]In actual use, it is found that the existing applications start to establish the wireless link and perform data transmission after the vehicle (such as a train) stops, and the data transmission time during the stop is relatively short, which brings great challenges to wireless transmission. The embodiment of the present invention increases the available data transmission time between the vehicle and the roadside equipment by accelerating the connection establishment process when the train enters the platform, thereby optimizing the data exchange between the train and the platform. Specifically, the embodiment of the present invention proposes a mechanism based on media access control (MAC, Media Access Control) address bundling, so as to shorten th...

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Abstract

The invention discloses a transportation means and roadside device communication method and communication system. Specifically, the method comprises the following steps: assigning a same first media access control MAC (Media Access Control) address for a plurality of first communication units of the roadside device; when the transportation means drives to a place close to the roadside device, triggering a plurality of second communication units arranged on the transportation means to monitor beacon signals transmitted by the first communication units; and when the intensity of the beacon signal monitored by any second communication unit is larger than a preset threshold value, sending a request to the first MAC address by the second communication unit and connecting communication connection between the transportation means and the roadside device.

Description

technical field [0001] The invention relates to the communication field, in particular to a communication method and a communication system for vehicles and roadside equipment. Background technique [0002] With the process of urbanization, more and more people choose public transportation system to travel, which means that people will have more time to spend in transportation, such as the subway system. On the other hand, with the improvement of multimedia technology, multimedia content such as high-definition video is becoming more and more popular. Therefore, there will be a greater demand for high-capacity multimedia services, such as high-definition video on subway systems. That is, it is necessary to perform large-capacity multimedia broadcasting in a passenger information system (PIS, Passenger Information System). [0003] Considering that the wireless local area network (WLAN) technology has been widely used in the PIS of the subway system, it is a great challenge...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W76/02H04L29/12H04B17/00
CPCH04W76/02H04W36/22H04W36/08H04W84/12H04W76/10H04W36/083
Inventor 田继锋马蒂亚斯·兰珀
Owner SIEMENS AG
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