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Terminal D2D (device-to-device) communication method based on multiple-input multiple-output cooperation relay

A technology of terminal direct communication and cooperative relay, which is applied in the field of terminal direct communication based on multi-input and multi-output cooperative relay, and can solve the problem that the D2D communication rate or interruption rate cannot meet the requirements, and the channel link quality cannot meet the requirements, etc. problems, to achieve the effect of reducing the probability of interruption, improving the utilization rate of spectrum resources, and increasing the rate

Active Publication Date: 2014-03-26
NANJING UNIV OF POSTS & TELECOMM
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] However, when the distance between D2D users exceeds the effective distance of D2D communication, or the channel link quality between them cannot meet the requirements, the rate or interruption rate of D2D communication cannot meet the requirements.

Method used

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  • Terminal D2D (device-to-device) communication method based on multiple-input multiple-output cooperation relay
  • Terminal D2D (device-to-device) communication method based on multiple-input multiple-output cooperation relay
  • Terminal D2D (device-to-device) communication method based on multiple-input multiple-output cooperation relay

Examples

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Embodiment 1

[0025] Such as image 3 As shown, the D2D communication system of the MIMO cooperative relay of the present invention is in a cellular cell, and the system includes a base station, a cellular user, a pair of users to perform D2D mode communication and a relay, wherein the D2D user and the cellular The number of antennas of the user is M, the number of antennas of the relay is N, and the number of antennas of the base station is I. image 3 The interference situation when D2D users and relays multiplex uplink resources of cellular users is described in . image 3 D1 and D2 are the sending end and receiving end of the D2D user respectively, R represents the relay node, and C represents the cellular user. D1 represents the source node S among the three relay nodes, and D2 represents the destination node D among the three relay nodes. Assuming that the cellular user is always working, the cellular user will interfere with the relay node and D2. The relay works in time-division h...

Embodiment 2

[0102] like figure 1 As shown, in the broadband cellular mobile communication system (IMT-Advanced) of the present invention, a pair of cellular users want to perform terminal direct communication, but because the distance between them exceeds the effective distance of D2D communication, or the channel link quality between them If the requirements are not met, because there are a large number of idle UE users in the cell, idle mobile terminals are used as relays to assist a pair of cellular users in D2D communication. The sending end of a pair of terminal direct-to-cellular users is marked as D1, the receiving end is marked as D2, and the relay is marked as R. When D1 and R communicate, D1 multiplexes the frequency resources of cellular users and base stations in the cell. At this time, D1 and R form a pair of D2D communication; when R and D2 communicate, R also multiplexes cellular users and base stations. The frequency resource for base station communication (the same as th...

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Abstract

The invention discloses a terminal D2D (device-to-device) communication method based on a multiple-input multiple-output cooperation relay. In the method, multiple antennas and a relay technology are introduced to a D2D system, so that the rate and interruption probability of the D2D system are improved; in an IMT-Advanced (international mobile telecommunications-advanced) system, if a pair of cellular users need terminal D2D communication, but the distance between them exceeds an effective distance of D2D communication, or the quality of a channel link between them cannot reach requirements, in case that a large number of idle UE users exist in a district, by taking an idle mobile terminal as a relay, the pair of cellular users are assisted in D2D communication; a starting end of a pair of terminal D2D communication cellular users is marked as D1, a receiving end is marked as D2, and the relay is marked as R; when the D1 communicates with the Rs, the D1 reuses frequency resources of communication between the cellular users in the district and base stations, and at the moment, the D1 and the R form a pair of D2D communication.

Description

technical field [0001] The present invention relates to the technical field of computer wireless communication, in particular to a terminal direct communication method based on multi-input multi-output cooperative relay. Background technique [0002] Cellular mobile communication terminal direct technology (D2D, Device-to-Device) is an emerging research topic in the field of mobile communication in recent years. In a traditional cellular mobile communication system, the communication between two mobile terminals must be scheduled by the base station, and the scheduler at the base station allocates spectrum resources and channels for communication. After the introduction of D2D technology, if two mobile terminals in the system want to communicate, they may not communicate through base station forwarding. D2D technology is a terminal-to-device direct communication method. It is proposed to be used as an auxiliary communication method for the LTE system. That is, in the future...

Claims

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Application Information

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IPC IPC(8): H04W4/00H04B7/04H04B7/14
Inventor 邵世祥魏良武孙君
Owner NANJING UNIV OF POSTS & TELECOMM
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