Long-term evolutional cellular network based D2D (Device to Device) communication establishing device and method

A cellular network, long-term evolution technology, applied in wireless communication, connection management, electrical components, etc., can solve the problems of high signaling overhead of equipment, increasing interaction between eNodeB and D2D equipment, increasing UE energy consumption, etc.

Inactive Publication Date: 2015-12-02
XIAMEN UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that a large number of resources need to be reserved in advance. In areas with few users, resources will be wasted in large quantities. In areas with dense users, if the reserved resources are not enough, multiplexing will occur, causing interference between users, and at the same time reducing user interference. access rate
[0005] The patent "A Spectrum Access Method for D2D Users in a Hybrid Cellular and D2D Communication System" needs to know the interference situation of all UEs in the current cell and then issue resources. This requires frequent reporting of measurement volumes, resulting in huge equipment signaling overhead and occupying a large amount of memory; The patent "Embedded D2D Implementation Method for Subsequent Evolution Based on the IMT-A Standard" needs to obtain the location information of the UE, which uses GPS and updates frequently, which greatly increases the energy consumption of the UE; the patent "D2D Terminal Connection Establishment Method, Device and System" requires The eNodeB paging the target user to send resources, which increases the interaction between the eNodeB and the D2D device and brings additional signaling overhead
Moreover, there is currently a lack of a complete establishment mechanism and resource recovery mechanism for D2D connections.

Method used

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  • Long-term evolutional cellular network based D2D (Device to Device) communication establishing device and method
  • Long-term evolutional cellular network based D2D (Device to Device) communication establishing device and method
  • Long-term evolutional cellular network based D2D (Device to Device) communication establishing device and method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0090] This embodiment provides a method for transparently establishing a D2D connection such as figure 2 ,Proceed as follows:

[0091] (1) Since the LTE core network gateway (ServingGateway) processes the IP header of each data, when it finds that the source and destination of a data packet are within the same eNodeB range, or within the adjacent eNodeB range, they can be considered as It is a potential D2D data flow, and then initiates a connection request to the eNodeB. The request includes the ID information of both devices and the service type, that is, transparently establishes a D2D connection. Here, the transparent establishment of the D2D connection is only for the newly established D2D pair network.

[0092] (2) After receiving the request, the eNodeB analyzes the request information and sends the establishment of D2D policy information table to one of the users (hereinafter referred to as the first user) according to the network conditions, as shown in Table 11. At ...

Embodiment 2

[0105] This embodiment provides a method for actively establishing a D2D connection such as image 3 ,Proceed as follows:

[0106] (1) The user sends the device identifier, D2D enabled status and service type, and detects other D2D device information as shown in Table 14, and actively initiates the user to select other devices and initiates a D2D connection request as shown in Table 15.

[0107] Table 14 Device Discovery Parameter Information Table

[0108] parameter name length / bit Equipment Identity 10010101…00111000(48bit) D2D state 1 business type 01

[0109] Table 15 D2D connection request information table

[0110]

[0111] (2) After receiving the request, the eNodeB analyzes the request information and obtains the uplink synchronization timing advance value TA according to the random access process initiated by the user, and then determines the distance from the user to the center of the cell. If the distance is greater than a cer...

Embodiment 3

[0125] This embodiment provides a method for joining a D2D cluster connection such as Figure 4 ,Proceed as follows:

[0126] (1) The user sends the device identification, D2D open status and service type. After receiving the user information, the eNodeB will send the currently existing D2D pair / cluster information within the response time window, providing the possibility of joining the established D2D cluster. The initiating user selects a certain cluster and initiates a D2D connection request as shown in Table 19.

[0127] Table 19 D2D connection request information table to join the cluster

[0128]

[0129] (2) The eNodeB analyzes the request information after receiving the request, and inquires whether the cluster can accommodate new members and whether the service type matches. If yes, send the configured resources to the user, including the channel resource number and power as shown in Table 20; otherwise, reject the user access.

[0130] Table 20 Configuration r...

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Abstract

The invention discloses a long-term evolutional cellular network based D2D (Device to Device) communication establishing device and method. The communication establishing device is provided with a user equipment device and an eNode B device; the user equipment device is provided with an equipment message sending device, a receiving device, a measuring device and a buffer; and the eNode B device is provided with a receiving device, a sending device, a control device and a buffer. The communication establishing method comprises: a user sends a message, detects other D2D equipment messages and actively initiates a D2D connection request; the eNode B sends a strategy table; the user side carries out channel measurement so as to generate a feedback information table and sends the table to the eNode B; the eNode B selects a mode and sends a resource distribution message; the actively initiating user sends a training sequence among the other selected users for link measurement, communicates with the selected users and sends a confirmation message; the eNode B establishes a D2D maintenance table and periodically collects measurement information updating tables of a D2D pair / cluster, and deletes the messages of the D2D pair or cluster if a link release message is received.

Description

technical field [0001] The present invention relates to a long-term evolution cellular network, in particular to a device-to-device communication establishment device and method based on a long-term evolution cellular network. Background technique [0002] In recent years, with the development of mobile multimedia communication technology and the popularization of smart terminals, wireless communication has higher and higher requirements for transmission rate, which has brought great pressure to base stations with very limited spectrum resources. The implementation of device-to-device (Device to Device Communication, D2D) communication technology in the LTE cellular network can effectively reduce the burden of the cellular network, increase the spectrum efficiency of the cellular communication system, increase the data transmission rate, and reduce the battery power consumption of the mobile terminal. [0003] The D2D communication technology can efficiently and energy-savin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W76/02H04W72/04
CPCH04W72/0453H04W76/11H04W72/52
Inventor 黄联芬杜亮林志坚林思晨张远见李馨李俊
Owner XIAMEN UNIV
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