Random access method in smart power grid communication

A smart grid communication and random access technology, applied in wireless communication, electrical components, etc., can solve the problems affecting the random access of voice and data communication and increase the probability of collision, so as to reduce the probability of random access collision and avoid impact , The effect of saving signaling resources

Inactive Publication Date: 2014-06-04
UNIV OF SCI & TECH OF CHINA +2
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AI Technical Summary

Problems solved by technology

Due to the large number of meters and the frequent and periodic reporting of data, the probability of multiple meters selecting the same preamble is high, resu

Method used

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  • Random access method in smart power grid communication
  • Random access method in smart power grid communication
  • Random access method in smart power grid communication

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Embodiment Construction

[0032] For example, there are multiple common users and smart meters within the coverage of an LTE base station, and a contention-based random access process is performed when communication services are needed. Assume that in a time slot, 2 common users and 20 smart meters simultaneously initiate contention-based random access. In the conventional random access method, there are 64 preambles in total. Assuming that there are 40 contention-based preambles, the probability of successful access of a user / smart meter is:

[0033] P 1 = ( 1 - 1 40 ) 22 - 1 = 0.587

[0034] If the random access method of the present invention is adopted, that is, two ordinary users use the original 40 preambles based on contention, and th...

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Abstract

The invention provides a random access method in smart power grid communication. Under the condition of not increasing additional signaling overheads, the random access collision probability is lowered, and system performance is improved. Due to the fact that multiple smart power grid devices exist and carry out data reporting frequently, the random access collision probability is greatly improved, and the random access process of a common user can be influenced. The random access process for the smart power grid scene is provided. Two different leader sequence sets are generated and used for the common user and a smart power grid respectively. One of MAC RARs is used for reserving bits for marking whether random access is from the common user or the smart power grid. Therefore, under the condition that no additional signaling overhead exists, the random access collision probability of the smart power grid can be reduced, and the random access of the common user cannot be influenced.

Description

technical field [0001] The invention relates to a random access process in smart grid wireless communication, which reduces the probability of random access collisions. Background technique [0002] Smart grid is a modern grid system that combines communication network and grid system. Through the real-time collection and analysis of data in the power grid, the purpose of power load control and demand response can be achieved, energy utilization efficiency can be improved, and safe, reliable and high-quality power supply can be ensured. In the smart grid, there are a large number of advanced sensing and measurement technologies and equipment in the links of power generation, power transmission, power distribution, and power consumption, which require the support of network communication technology. However, communication in the smart grid is different from traditional data or voice services, and has specific characteristics and requirements. For example, there are many ter...

Claims

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Application Information

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IPC IPC(8): H04W74/08
Inventor 杨坚司鹏郭经红张浩
Owner UNIV OF SCI & TECH OF CHINA
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