Dynamic spectrum distribution method based on covering frequency in heterogeneous wireless network

A heterogeneous wireless network and dynamic spectrum technology, applied in the field of dynamic spectrum allocation, can solve the problems that the user's SINR performance cannot be guaranteed, and the actual channel fading characteristics are not considered.

Inactive Publication Date: 2013-02-13
XIDIAN UNIV
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Problems solved by technology

In addition, these dynamic spectrum allocation algorithms only consider the path loss of channel propagation when analyzing interference, and do not consider the fading characteristics of the actual channel, which will cause the allocation results to fail to guarantee the user's SINR performance in the actual channel environment

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  • Dynamic spectrum distribution method based on covering frequency in heterogeneous wireless network
  • Dynamic spectrum distribution method based on covering frequency in heterogeneous wireless network
  • Dynamic spectrum distribution method based on covering frequency in heterogeneous wireless network

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Embodiment Construction

[0047] Referring to the above-mentioned accompanying drawings, the specific implementation manners of the present invention will be described in further detail.

[0048] see figure 1 , a heterogeneous wireless network (HWN) scenario and a dynamic spectrum allocation DSA system model, in which multiple wireless networks coexist and form a HWN by sharing a core network. The network reconfiguration management module (Network Reconfiguration Manager, NRM) of the core network is responsible for managing the spectrum resources of the HWN, and periodically and dynamically allocates the spectrum to each cell base station according to the change of the cell service load. At the same time, NRM needs to control the interference between BSs to ensure that the BSs cover the user services of the cell.

[0049] Assuming that the thermal noise at the receiving end of the user is negligible, the signal-to-interference ratio (SIR) of the user is

[0050] SIR ...

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Abstract

The invention relates to a dynamic spectrum distribution method based on covering frequency in a heterogeneous wireless network. The method is characterized by comprising total frequency spectrum benefit maximization and interference control, wherein the interference control is based on a coverage probability threshold, and the interference control model is p[n,m](A)>=beta n (1); and based on the interference control model, modeling of a covering frequency based dynamic spectrum distribution algorithm (CP-DSA) is defined in the description in the interference control model based on coverage probability, user signal interference noise ratio and base station coverage performance requirement are considered at the same time, starting from the purpose of ensuring the base station coverage probability requirement, to achieve the purpose of ensuring user service quality requirement in a cell; and by adopting the dynamic spectrum allocation algorithm CP-DSA based on covering frequency, the total frequency spectrum benefit can be improved, interference between base stations is effectively controlled, and under the condition of an actual shadow fading channel, the user SIR (signal interference noise ratio) requirement is met.

Description

【Technical field】 [0001] The invention relates to a dynamic spectrum allocation method based on coverage frequency in a heterogeneous wireless network. 【Background technique】 [0002] With the rapid development of wireless communication technology and wireless services, heterogeneous wireless networks with multiple access networks coexisting have become the development trend of wireless communication networks, and their spectrum requirements are also increasing rapidly. The fixed spectrum allocation policy allocates available frequency bands to specific For wireless technology, there are very few frequency bands reserved for new systems and new technologies, and the shortage of spectrum resources is becoming increasingly serious. On the other hand, some of the allocated frequency bands are under-utilized. These situations urgently require an effective dynamic spectrum allocation method. [0003] In the study of dynamic spectrum allocation, interference control technology i...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W16/10H04W16/14
Inventor 李钊石华王琳李建东赵林靖刘勤马英红
Owner XIDIAN UNIV
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