A D2D communication resource allocation method based on cellular network

Abstract

The invention discloses a D2D communication resource allocation algorithm based on a cellular network. First, the parameters in the system are confirmed, such as the number of communication resource blocks K, the number of cellular users M, the number of D2D users N, the interference threshold of D2D users, etc., and the interference matrix is ​​calculated. I N×M and I M×N , and then loop through the interference matrix I N×M , find the minimum interference value of the matrix, select resource block k for cellular user CUm and user pair D2Dn, and remove resource block k from set K. Interference Matrix I N×M The interference values ​​of the nth row and the mth column in are all set to ∞, if the cellular users who have not allocated communication resources are not 0, the resource blocks in the set K are allocated to these cellular users until the communication set K is an empty set , to end the loop. The present invention discards D2D users that cause greater interference to cellular users, allows the largest number of D2D logarithms to access the communication system, and significantly reduces the interference caused by D2D users to cellular users.

Description

technical field [0001] The invention belongs to the technical field of wireless network communication, and in particular relates to a D2D communication resource allocation method based on a cellular network. Background technique [0002] With the rapid development of mobile multimedia applications and related services, spectrum resources are becoming increasingly scarce. Today, as media services such as high-definition video are becoming more and more popular, their high-traffic characteristics bring enormous pressure to operators' core networks and spectrum resources. The local media service based on D2D (device-to-device, device-to-device) technology utilizes the characteristics of short-distance communication of D2D communication, which can realize the effective use of spectrum resources and obtain the gain of resource space division multiplexing. D2D technology directly realizes data exchange and service provision without base station switching, which can effectively re...

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Problems solved by technology

[0004] However, the deficiency of the above literature is that it does not take into account that in actual application scenarios, it is impossible for a cell to have only one D2D user pair, but several pairs of D2D users are randomly distributed. Therefore, under the premise of ensuring communication quality, how to reasonably Allocating communication resources, allowing the number of D2D pairs to communicate as much as possible, and controlling D2D to minimize user-to-cellular user interference is a problem that needs further research

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