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A resource allocating method based on terminal direct communication

A terminal direct communication and resource allocation technology, applied in wireless communication, machine-to-machine/machine-type communication services, electrical components, etc., can solve problems affecting normal communication of cellular users, reducing system performance, interference between cellular users and base stations, etc.

Inactive Publication Date: 2015-07-15
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
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  • Application Information

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Problems solved by technology

However, since D2D users reuse the resources of cellular users, it will inevitably cause interference to cellular users and base stations. If this interference is not controlled, it will directly affect the normal communication of cellular users and even reduce system performance.

Method used

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  • A resource allocating method based on terminal direct communication
  • A resource allocating method based on terminal direct communication
  • A resource allocating method based on terminal direct communication

Examples

Experimental program
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Embodiment 1

[0039] Such as figure 1 As shown, the present invention provides a resource allocation method based on terminal direct communication, the method includes the following steps:

[0040] Step 1: Find all feasible multiplexing combinations;

[0041] The multiplexing combination refers to a collection of cellular users and D2D users that multiplex the same resource.

[0042] Step 2: The number of D2D logarithms included in the multiplexing combination is N;

[0043] The multiplexing combination whose initial value of N is the maximum D2D logarithm included in the multiplexing combination enters the candidate set, and the throughput gain of all the multiplexing combinations in the candidate set is calculated.

[0044] Step 3: Find out the multiplexing combination with the largest throughput gain in the candidate set and enter the active set.

[0045] Step 4: Delete all multiplexing combinations that conflict with the active set to ensure that D2D users and cellular users do not g...

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Abstract

The present invention discloses a resource allocating method based on terminal direct communication, which includes: using exhaustive search to find all feasible reuse combinations, wherein the feasibility thereof is mainly determined according to a channel state and a communication demand of a user; screening the reuse combinations meeting the condition to entering a candidate set, and calculating a throughput gain of all of the reuse combinations in the set; finding the reuse combination with the greatest throughput gain to enter an effective set, and allocating a resource for the same; deleting all reuse combinations conflicted with that in the effective set, to ensure the D2D user and the cellular user will not obtain a repeated resource; repeating the selection until the reuse combinations only contains a pair of D2D users and one cellular user; and using a Kuhn-Munkres algorithm, to find the optimal reuse combination to enter the effective set. Each reuse combination in the effective set has a resource, and the D2D user reuses the resource of the cellular user in the same combination.

Description

technical field [0001] The invention relates to the technical field of mobile communication, and provides a resource allocation method based on direct-to-device (D2D) communication under an LTE-Advanced cellular system. Background technique [0002] D2D (Device-to-Device) communication technology is an end-to-end communication technology in a cellular system. Two users establish a direct link for communication without base station forwarding. D2D communication can reduce the forwarding data burden of the base station, improve the spectrum utilization rate of the cellular system, and increase the throughput of the system. However, because D2D users reuse the resources of cellular users, it will inevitably cause interference to cellular users and base stations. If this interference is not controlled, it will directly affect the normal communication of cellular users and even degrade system performance. Therefore, a reasonable resource allocation method is the key to improving...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04
CPCH04W72/0473H04W4/70
Inventor 孙君寇帅华邵世祥
Owner NANJING UNIV OF POSTS & TELECOMM
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