System and method for allocating transmission time slots based on qos emergency communication in smart grid
An emergency communication and transmission time slot technology, applied in the field of communication, can solve the problems of large number of devices, inaccessibility of devices, waste of resources, etc., and achieve the effect of avoiding data congestion and ensuring QoS
Active Publication Date: 2017-02-22
SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI +2
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Problems solved by technology
[0006] The purpose of the present invention is to provide a system and method for allocating time slots for emergency communication transmission based on quality of service in the smart grid, so as to solve the problem of the prior art when an emergency occurs due to the large number of devices required to be connected, and the devices are always delayed. Unable to access, resulting in a great waste of resources
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Embodiment 1
[0047] In this embodiment, 10 smart terminals and 2 bits in a small slot are taken as an example, that is, N=10 and M=2. Table 1 shows the actual situation corresponding to the information state of each intelligent terminal and the required information transmission space. M=2, then there are 4 information states.
[0048]
[0049]
[0050] Table 1
[0051] As shown in Table 1, three types of information need to be transmitted. 00 means that the smart terminal has no information data to send at this time; 01 means that the smart terminal sends periodic information data (data type III) at this time, with low delay requirements and large data volume; 10 means that at this time, the smart terminal sends Information data type II has low delay requirements and a small amount of data; 11 indicates that emergency situations are sent at this time, and the smart terminal needs urgent data (data type I), which has high delay requirements and a small amount of data. Once an emerg...
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The invention provides a system and method for emergency communication transmission time slot allocation based on QoS in a smart power grid. The system and method are applied to the smart power grid. The method comprises the steps that N intelligent terminals apply to a data center for data time slots through an uplink frame control portion and the data time slots are used for transmitting an uplink data portion, wherein N is a positive integer; the length of a downlink frame control response portion is modified by the data center according to the uplink frame control portion and after modification, a downlink data portion is fed back to each intelligent terminal; the downlink frame control response portion is read by each intelligent terminal and the uplink data portion is transmitted according to the downlink frame control response portion. Each intelligent terminal can request sending space from the data center through an uplink frame and a request is responded and managed by the data center through a downlink frame. Under emergency circumstances, each intelligent terminal can give an alarm to the data center through a frame header control portion so that occurrence of an emergency condition can be indicated. According to self-features of the smart power grid, transmission of part repeated data can be cancelled by the data center and data congestion caused by access of a larger number of intelligent terminals is avoided.
Description
technical field [0001] The invention relates to the field of communication technology, in particular to a QoS (Quality of Service) emergency communication transmission time slot allocation system and method in a smart grid. Background technique [0002] As a modern power grid infrastructure, the smart grid can improve transmission efficiency, improve the reliability and security of the transmission network, and integrate renewable energy and alternative energy through automatic control and modern communication technology. In the smart grid, the online status monitoring, diagnosis and protection of the power system can be realized by means of reliable and timely communication, so as to alleviate the limitation of the grid capacity to a large extent and avoid equipment failure, natural accidents and disasters. Intelligent and low-cost grid monitoring technology has become an indispensable condition for maintaining the security, reliability, high efficiency and normal operation...
Claims
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IPC IPC(8): H04W72/04H04W48/06H04W48/10
Inventor 谭冲吴亦衎俞凯马林郭经红卜智勇
Owner SHANGHAI INST OF MICROSYSTEM & INFORMATION TECH CHINESE ACAD OF SCI