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Transfer strategy realization method based on interruption performance improvement in cellular D2D communication system

A technology of communication system and transmission strategy, which is applied in the field of communication to achieve the effect of improving interrupt performance, reducing the impact of harmful interference, and increasing throughput

Active Publication Date: 2015-08-12
NANJING UNIV OF POSTS & TELECOMM
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  • Claims
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Problems solved by technology

However, these protocols have certain limitations in the improvement of system interrupt performance.

Method used

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  • Transfer strategy realization method based on interruption performance improvement in cellular D2D communication system
  • Transfer strategy realization method based on interruption performance improvement in cellular D2D communication system
  • Transfer strategy realization method based on interruption performance improvement in cellular D2D communication system

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Embodiment Construction

[0022] The invention will be further described in detail below in conjunction with the accompanying drawings of the description.

[0023] Such as figure 1 As shown, the cellular D2D communication system of the present invention includes a pair of D2D users, a cellular user, and a base station as an AF relay, respectively using D2D 1 ,D2D 2 , CU, R said. Assuming a single cell scenario, the channel condition is a Rayleigh fading channel, all nodes work in half-duplex mode, equipped with a single antenna, the uplink and downlink channels are reciprocally unchanged, and in the case of high SNR, from The interference of cellular users to the D2D link is far greater than the noise power.

[0024] with P i To represent the transmit power of node i, where i∈{1,2,R,C}. For a Rayleigh fading channel, use h ij To represent the channel coefficient between node i and node j, where i, j∈{1,2,R,C}, i≠j. Since the channel is reciprocally invariant, there is h ij =h ji . Noise n of ...

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Abstract

The invention discloses a transfer strategy realization method based on interruption performance improvement in a cellular D2D communication system. According to the method, a base station is taken as a bidirectional amplify-forward (AF) relay in the D2D system, and the base station performs normal communication with other cellular users. The concrete steps comprise that in a first time slot, a D2D user 1 sends signals to a D2D user 2 and the relay (base station) via a direct link and a relay link respectively, and the base station also receives uplink signals from the other cellular users; in a second time slot, the D2D user 2 sends signals to the D2D user 1 and the relay (base station) via the direct link and the relay link respectively, and the base station sends downlink signals to the other cellular users; and in a third time slot, the relay (base station) amplifies mixed signals received in the previous time slots and forwards the processed signals to the two D2D users. Compared with the traditional D2D communication, D2D communication provided by the invention is advantaged in that interference from the cellular users is inhibited, and the interruption performance of the system is greatly improved.

Description

technical field [0001] The invention relates to a method for implementing a transmission strategy based on interruption performance improvement in a cellular D2D communication system, and belongs to the technical field of communication. Background technique [0002] With the rapid development of modern communication technology, the base of mobile users is getting larger and larger, but spectrum resources are limited, which poses a severe challenge to the utilization of spectrum resources. To solve this problem, the field of D2D communication based on cellular network has attracted more and more attention. D2D communication based on cellular network can not only improve the utilization rate of spectrum resources and cell throughput, but also realize reliable transmission of information within a short distance with low transmission power. [0003] Despite the significant advantages of D2D communication, there are still issues of security and harmful interference. Therefore, ...

Claims

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Application Information

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IPC IPC(8): H04W4/00H04W16/14H04W52/34
CPCH04W4/70H04W16/14H04W52/346
Inventor 赵夙程腾飞
Owner NANJING UNIV OF POSTS & TELECOMM
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