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Cross-layer design method for downlink resources in D2D (device-to-device) technology sharing system

A shared system, cross-layer design technology, applied in wireless communication, electrical components, etc., can solve problems such as complex interference

Active Publication Date: 2015-04-29
NANJING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
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Problems solved by technology

[0004] Although the introduction of D2D terminals can bring additional gains to traditional cellular systems, it also makes interference more complicated
Existing Interference Coordination Techniques Are No Longer Applicable

Method used

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  • Cross-layer design method for downlink resources in D2D (device-to-device) technology sharing system
  • Cross-layer design method for downlink resources in D2D (device-to-device) technology sharing system
  • Cross-layer design method for downlink resources in D2D (device-to-device) technology sharing system

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Embodiment Construction

[0114] The present invention considers two system models, that is, Scenario A: Intra-cell D2D communication and cellular users multiplexing downlink resources and Scenario B: Inter-cell D2D communication and cellular users multiplexing downlink resources. Around resource allocation issues in different application scenarios.

[0115] around figure 1 For single-user scenarios, refer to image 3 , for the scenario where a single D2D communication pair and cellular users coexist in a cell, the specific implementation of the cross-layer design scheme is as follows:

[0116] In this scenario, there are mainly two types of interference, namely the interference from the BS to the D2D receiving end and the interference from the D2D sending end to the CU1. In order to control these two interferences and take into account the performance of CU1 and D2D users, the resource allocation scheme is as follows:

[0117] Step 302: First, the BS obtains location information about the cellular ...

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Abstract

The invention relates to a cross-layer design method for downlink resources in D2D (device-to-device) technology sharing system, in particular to a method and an algorithm for allocation and scheduling cross-layer resources in downlink resources of a cellular subscriber multiplexing cellular system with D2D terminals in an IMT-Advanced (international mobile telecommunications-advanced) system. A considered system model comprises an intra-cell application scenario and an inter-cell application scenario. D2D subscribers existing in a wireless cellular network system in the form of self-organization and cellular network subscribers co-exist in the form of underlay and share the same downlink radio resources (including channels, timeslot, power and space). Allocation and scheduling on the resources are discussed to solve the problems of interference coordination and suppression. The intra-cell application scenario and the inter-cell application scenario are considered respectively, common features of the different application scenarios are found, and personality factors of the different application scenarios are also considered. For characteristics of a D2D and cellular network system, the defects in existing resource allocation schemes are overcome and the resource-based cross-layer optimization, allocation and scheduling method is provided.

Description

technical field [0001] The present invention is aimed at the scenario of direct-to-device (D2D) technology sharing cellular system downlink resources, and proposes a joint physical layer, link layer, and network layer for joint scheduling and optimal allocation of frequency, time, space, and power resources. Background technique [0002] In order to overcome the limitations of the base station-centered cell service provision mode in the IMT-Advanced system in adapting to the development of local services brought about by the development of wireless multimedia services, the direct-to-device (D2D) technology is now introduced to improve the network structure and enhance coverage , Improve system capacity. [0003] The introduction of D2D technology into the cellular mobile communication system will form the coexistence of cellular communication and D2D communication. In addition to being a communication mode, D2D terminals are also used as mobile relay nodes in order to expand...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W72/04H04W72/12
Inventor 孙君朱洪波邵世祥
Owner NANJING UNIV OF POSTS & TELECOMM
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