Dynamic spectrum access method with network cognition ability

A technology of dynamic spectrum access and network awareness, applied in the field of dynamic spectrum access

Inactive Publication Date: 2011-11-23
NORTHEASTERN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0008] Aiming at the shortcomings of the existing technology, and comprehensively solving the problem of dynamic spectrum access, the present invention proposes a dynamic spectrum access method with network cognitive ability

Method used

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  • Dynamic spectrum access method with network cognition ability
  • Dynamic spectrum access method with network cognition ability
  • Dynamic spectrum access method with network cognition ability

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Experimental program
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Embodiment

[0266] The network coverage is 1000*1000m, 10 primary users are randomly distributed in the network, and the number of secondary users increases from 1 to 10, and there are 10 independent channels in total. Such as figure 2 As shown; this embodiment adopts a dynamic spectrum access method with network cognitive capabilities, such as figure 1 As shown, the steps are as follows:

[0267] Step 1: Channel switching

[0268] Build a network model, arbitrarily generate the positions of slave users and master users, and arbitrarily allocate channels used by master users. The available spectrum is divided into a series of frequency bands, which vary in bandwidth and transmission range, and these frequency bands are called channels. Each channel is completely orthogonal, allowing users to use multiple channels. When several users use the same channel within a certain range at the same time, conflicts and interference will occur. All users' locations are fixed.

[0269] Step A: A...

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Abstract

The invention relates to a dynamic spectrum access method with a network cognition ability, belonging to the technical field of wireless communication. The dynamic spectrum access method comprises the following steps of: (1) channel allocation: available spectra are segmented into a series of frequency bands, the frequency bands are different in bandwidth and transmitting ranges, and the frequency bands are channels; each channel is completely orthogonal, and a secondary user can use multiple channels at the same time; when several users use the same channel at the same time within a certain range, conflicts and interference occur; and the positions of all users are permanent; (2) channel access: in a cognitive wireless network, the secondary users fully utilize channels not used by primary users, i.e. the secondary users take full advantage of idle time slots of channels allocated to the primary users; and the primary users using the channels do not take the existence of the secondary users into account by using a second-order Markov Model; and (3) channel switching.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and in particular relates to a dynamic frequency spectrum access method with network cognitive capability. Background technique [0002] With the successful application of 3G communication technology, various wireless users and wireless services increase rapidly, and corresponding protocols and standards are continuously proposed, but these protocols and standards require users to work in a specific spectrum range. That is to say, the current spectrum allocation strategy is static spectrum allocation, that is, once the spectrum is allocated to a certain user, other users cannot use the spectrum. Therefore, for newly added wireless users, the spectrum available will become less and less. This static allocation strategy seriously reduces the spectrum utilization and hinders the further development of wireless communication. Therefore, an intelligent and dynamic spectrum allocation ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/10H04W74/00
Inventor 蒋定德韩洋许争争
Owner NORTHEASTERN UNIV
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