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Frequency spectrum resource sharing method for authorized user oriented automatic repeat request in cognitive radio network

An automatic retransmission request and cognitive wireless network technology, applied in wireless communication, network planning, electrical components, etc., can solve the problems of cognitive user interference elimination, low cognitive user transmission rate, and low spectrum utilization, etc. question

Active Publication Date: 2015-09-23
XI AN JIAOTONG UNIV
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  • Application Information

AI Technical Summary

Problems solved by technology

In the existing ARQ-based spectrum sharing technology, cognitive users only transmit in retransmission time slots, and many technologies do not consider the interference cancellation of cognitive users. Therefore, the current ARQ-based spectrum sharing technology will cause spectrum The utilization rate is low, and the transmission rate of cognitive users is also relatively low

Method used

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  • Frequency spectrum resource sharing method for authorized user oriented automatic repeat request in cognitive radio network
  • Frequency spectrum resource sharing method for authorized user oriented automatic repeat request in cognitive radio network
  • Frequency spectrum resource sharing method for authorized user oriented automatic repeat request in cognitive radio network

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Embodiment Construction

[0058] The present invention will be further described in detail below in conjunction with specific embodiments, which are explanations of the present invention rather than limitations.

[0059] The present invention considers an Underlay network, such as figure 1 shown. The authorized user network consists of an authorized user sender (PT) and an authorized user receiver (PR). When an authorized user's initial transmission experiences interruption (the initial transmission link experiences severe fading or interference), PR will send an automatic retransmission request for retransmission transmission. We assume that authorized user information has only one retransmission opportunity, and the cognitive network consists of a cognitive sender (ST) and a cognitive receiver (SR). Cognitive users will listen to the automatic repeat request signal of authorized users to allocate power and share authorized channels.

[0060] Assume that the cognitive user network and the licensed ...

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Abstract

The invention discloses a frequency spectrum resource sharing method for an authorized user oriented an automatic repeat request in cognitive radio network, and belongs to the technical field of radio communication. A time division mechanism is used, and each data frame of the cognitive radio network is halved into two time slots; in the first time slot, the authorized user carries out first transmission, and a cognitive user shares a channel in the Underlay transmission manner; and in the second time slot, the authorized user carries out repeated transmission according to information of automatic repeat request, and the cognitive user shares the channel under the condition that the interruption performance of the authorized user is ensured. The problem of maximizing the average transmission speed of the cognitive user is established, and solved to obtain the power distribution scheme of the cognitive user in the repeat transmission time slot; and interference is eliminated, so that the cognitive user can obtain high transmission speed, and the ARQ information of the authorized user can be used by the cognitive user to protect transmission of the authorized user and further to reduce the interruption possibility of the authorized user.

Description

technical field [0001] The invention belongs to the technical field of wireless communication, and relates to a cognitive user spectrum access method and a power allocation scheme design, in particular to a spectrum resource sharing method for automatic retransmission requests of authorized users in a cognitive wireless network. Background technique [0002] With the increase of wireless devices and wireless transmission requirements, available wireless spectrum resources are becoming increasingly scarce. However, the traditional fixed spectrum allocation scheme does not take into account the difference in space and time spectrum usage by users, resulting in a waste of spectrum resources. Cognitive radio technology allows cognitive users without licensed spectrum to use idle or underutilized wireless spectrum resources, thereby improving spectrum utilization. [0003] In a cognitive radio network, cognitive users share spectrum resources of licensed users through Interweave...

Claims

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Application Information

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IPC IPC(8): H04W16/14H04W16/10
CPCH04W16/10H04W16/14
Inventor 任品毅王大伟王熠晨杜清河孙黎
Owner XI AN JIAOTONG UNIV
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