Frequency hopping device and method on reconstructable channel set
A channel and frequency hopping technology, applied in the field of physical layer frequency hopping and high-reliability frequency hopping, it can solve the problems of frequency band break, frequency hopping transmission problem, and affecting the design of frequency hopping sequence.
Inactive Publication Date: 2013-02-27
UNIV OF SCI & TECH BEIJING
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Problems solved by technology
On a frequency band, there is a fixed interference with an uncertain location, which causes the frequency band to break and affects the design of the frequency hopping sequence
For example, China has opened the 470MHz-510MHz frequency band for smart meters, but in this frequency band, regional wireless TV streaming media broadcasts occupy part of the frequency band, and the frequency bands in various regions are inconsistent, which leads to the discontinuity of the 470MHz-510MHz channel. Causes problems for frequency hopping transmissions
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[0027] The implementation of the present invention will be described in detail below in conjunction with the accompanying drawings and examples.
[0028] figure 1 is a schematic diagram of frequency band interference. On the same frequency band, interference may appear in different positions, Li and Hi represent the start and end positions of a certain interference frequency band respectively, and the interference length is ∑(H i -L i ). Taking 470-510MHz as an example, wireless multimedia streaming data services in different regions occupy different bandwidths and locations, so the number of effective channels is also different. Each channel of 470-510Mhz has a bandwidth of 200KHz, so the total number of effective channels is: (510-470- ∑(H i -L i ))MHz / 200KHz.
[0029] figure 2 It represents the structure of the frequency hopping device on the reconfigurable frequency channel set of the present invention. The frequency hopping generation device on the reconfigurable...
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The invention discloses a frequency hopping device and a frequency hopping method on a reconstructable channel set. In available radio frequency ranges regulated by the Radio Management Committee, because a part of the frequency ranges are interference by streaming media communication and the like to cause discontinuous actual available channels, the number of the actual available channels and the channel positions are different together with different environments. The frequency hopping method comprises the following steps of: adopting Li and Hi to represent an initial position and an end position of a group of interfering frequency ranges respectively, mapping m discontinuous actual available channels in n specific channels into m continuous logical channels, and generating a frequency hopping sequence through the m continuous logical channels; inversely mapping the frequency hopping sequence composed of the m continuous logical channels on the m discontinuous actual available channels in the n specific channels through a mapping device so as to form an actual frequency hopping sequence; and executing frequency hopping operation on a physical layer according to the frequency hopping sequence. The interfering frequency ranges under different environments can be adapted through the arrangement of the Li and Hi, and influence is not generated on the frequency hopping device.
Description
technical field [0001] The present invention relates to physical layer frequency hopping technology in the field of wireless network technology, and mainly aims at the frequency hopping problem in the case of discontinuous available frequency bands caused by wireless networks under specific interference, and realizes it under interference conditions of frequency bands in different environments and regions through interference boundary reconstruction High reliability frequency hopping. Background technique [0002] Wireless network technology is applied to information collection and control in the physical world, and penetrates into various industries such as electric power and logistics with its intelligent and networked features. It is an important direction for the innovation and development of the IT industry in the future. This technology is at the forefront of the computer network research field, reflecting the prospect of huge industrial development. Wireless communic...
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IPC IPC(8): H04B1/7136H04B1/715
Inventor 万亚东曾鹏王沁
Owner UNIV OF SCI & TECH BEIJING