Bandwidth allocation method of UWB (Ultrawideband) wireless network

Abstract

The invention discloses a bandwidth allocation method of a UWB (Ultrawideband) wireless network used for allocating a plurality of bandwidths of the UWB wireless network to a plurality of terminal devices. The bandwidth allocation method of the UWB wireless network comprises the following steps of: firstly, measuring power needed by each terminal device for transferring a signal in the plurality of bandwidths; and allocating at least one of the plurality of bandwidths to each terminal device according to a channel model, a bandwidth allocation algorithm and a power measuring value corresponding to each terminal device, wherein the channel model has the characteristic that the average bandwidth gain decreases along with frequency increase. In an embodiment, the channel model comprises an SV (Stochastic Volatility) model and a path attenuation model, the bandwidth allocation method is an algorithm with the computational complexity O (KS), K is the number of the plurality of terminal devices, and S is the number of the plurality of bandwidths.

Description

【Technical field】 [0001] The present invention relates to a frequency band allocation method, in particular to a method for allocating several frequency bands of an ultra-broadband wireless network to several terminal devices. 【Background technique】 [0002] Ultra-wideband (UWB) radio systems use a frequency bandwidth between 3.1 GHz and 10.6 GHz, providing more than 100 frequency bands within this frequency range for terminal devices to transmit wireless signals. Since the UWB radio system has the advantages of achieving high-capacity transmission with extremely low transmission power and using a very wide frequency band, it has become a major research and development project in the field of wireless networks. Among them, how to make the UWB radio system maintain a high data transmission rate and low power consumption in the case of an increase in the number of end users is one of the key points of research and development. When a new user intends to use a new terminal dev...

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Problems solved by technology

[0005] Although the above prior art can allow terminal devices to use a better frequency band to reduce the power of the UWB radio system, if K terminal devices are allowed to allocate frequency bands from S frequency bands, the computational complexity of the frequency band allocation method in the prior art is O(K 2 S), which means that when the number of terminal devices increases, the calculation amount required by the frequency band allocation method will increase at the square level of the number of terminal devices, resulting in a slow response of the UWB radio system

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