Sense switchover method under co-frequency coverage

A switching process and vehicle head technology, applied in electrical components, wireless communication, network planning, etc., can solve problems such as waste of wireless frequency resources, and achieve the effect of solving waste, avoiding wireless interference, and achieving stability and reliability.

Inactive Publication Date: 2013-02-27
上海寰创通信科技股份有限公司
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  • Abstract
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  • Claims
  • Application Information

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Problems solved by technology

But this method has obvious disadvantages: because the probability of two vehicles meeting is much smaller than the chance of staggering each other, it is a serious waste of radio frequency resources to use an additional frequency point for a short meeting

Method used

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  • Sense switchover method under co-frequency coverage
  • Sense switchover method under co-frequency coverage
  • Sense switchover method under co-frequency coverage

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Embodiment Construction

[0029] Such as figure 1 , figure 2 , image 3 As shown, the present invention includes a mobile node (that is, a vehicle station), a base station (BS), a base station controller, and the like. The main functions of the above-mentioned system components are: the vehicle-mounted station provides wireless access to the ground for other equipment in the train; the base station is responsible for wireless communication with the vehicle-mounted station, and connects ground wired communication equipment such as the base station controller. Other devices are not directly related to the present invention and will not be described here. Two on-board stations need to be installed on the train, one at the front and one at the rear; the base station antenna needs to cover both sides along the line (for example, use two directional antennas facing different directions).

[0030] In the train-to-ground wireless communication in the linear track environment, in order to prevent the mutual...

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Abstract

The invention relates to a sense switchover method under co-frequency coverage, which comprises the following steps: adjacent train noses with an overclose distance are sensed by utilizing a broadcast message sent among nodes; after the overclose train noses are detected, a switchover process of the train noses and train tails are initiated, and a train tail in a longer distance is used for communicating with a base station; a transmission channel of the train noses and the train tails, which is established in advance is utilized to transmit data to the train tails and return a service data message sent from a train nose base station from the train tail; and after the distance of the train noses is detected and guarantees that mutual interferences are eliminated, a switchover process from the train tail to the train nose is initiated so as to recover using the train nose for communicating with the base station. Compared with the prior art, the method effectively avoids the waste of wireless frequency resources of double-frequency and multi-frequency networking and also avoids the wireless interferences between two trains during single-frequency networking. In addition, the method has simple algorithm and stable and reliable realization.

Description

technical field [0001] The invention relates to the problem of serious interference between two groups of wireless communication nodes due to too close distance in the same-frequency networking situation, and particularly relates to a method for inductive switching under the same-frequency coverage. Background technique [0002] At present, in the environment with linear tracks such as subways, light rails, and intercity railways, in order to provide high-bandwidth real-time communication between trains and ground, a certain wireless communication system needs to be installed. The communication base station is installed on the side of the line, and the vehicle-mounted station is installed on the top of the train car or in the cab. Since the train line is usually double-track, trains traveling in both directions need to communicate, so communication base stations are required on both sides of the line, and trains in different directions communicate with the base station on th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W16/14H04W36/00H04W36/30
Inventor 尚涛吴亮
Owner 上海寰创通信科技股份有限公司
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