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Communication method and communication system from device to device and user devices

A technology for user equipment and communication methods, which is applied to wireless communication, electrical components, synchronization devices, etc., and can solve problems such as inability to transmit service data.

Inactive Publication Date: 2013-05-15
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention provides a device-to-device communication method and system, and a user equipment, to at least solve the problem that the traditional cellular communication method cannot be used to realize the direct transmission of service data between UEs in the D2D communication process in the prior art question

Method used

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  • Communication method and communication system from device to device and user devices
  • Communication method and communication system from device to device and user devices
  • Communication method and communication system from device to device and user devices

Examples

Experimental program
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Effect test

Embodiment 1

[0049] The present invention provides a preferred device-to-device communication system 300, such as image 3 As shown, the system includes: a first user equipment 302 , a second user equipment 304 and a network node 306 .

[0050] Wherein, the second user equipment 304 includes: a second sending unit 3042, configured to send the second reference signal to the first user equipment 302; the first user equipment 302 includes: a first detecting unit 3022, configured to detect the second sending unit 3042 The sent second reference signal; the first sending unit 3024, configured to send the first synchronization parameter according to the detection result.

[0051] The second user equipment 304 further includes: a first receiving unit 3044, configured to receive the first synchronization parameter sent by the first sending unit 3024; a determining unit 3046, configured to determine the device-to-device synchronization with the first user equipment according to the first synchroniza...

Embodiment 2

[0064] based on Figure 3-7 As shown in the device-to-device communication system, the present invention also provides a preferred device-to-device communication method, such as Figure 8 As shown, the specific steps include:

[0065] S802: The first user equipment detects the second reference signal sent by the second user equipment;

[0066] S804: The first user equipment sends a synchronization parameter according to the detection result;

[0067] S806: The second user equipment determines, according to the synchronization parameter, the timing of data transmission when performing device-to-device D2D communication with the first user equipment. Data transmission timing when a device performs device-to-device D2D communication.

[0068] In the above preferred embodiment, the first user equipment detects the reference signal sent by the second user equipment and generates a synchronization parameter according to the reference signal, and the second user equipment determin...

Embodiment 3

[0079] The present invention provides a preferred embodiment to further explain the present invention, but it should be noted that the preferred embodiment is only for better describing the present invention and does not constitute an improper limitation of the present invention.

[0080] In each of the preferred embodiments of the present invention, the 3GPP (3rd Generation Partnership Project) Long Term Evolution (Long Term Evolution, referred to as LTE) / LTE-A (LTE-Advanced) system is introduced as a background, but it does not constitute an introduction to the present invention. improper qualification. The downlink of LTE / LTE-A system is based on Orthogonal Frequency Division Multiplexing (OFDM) technology, and the uplink adopts SC-FDMA (Single carrier-Frequency Division Multiplexing Access) multiple access mode . In OFDM / SC-FDMA systems, communication resources are in the form of time-frequency two dimensions. For example, for LTE / LTE-A system, if Figure 9 As shown, th...

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Abstract

The invention discloses a communication method and a communication system from a device to a device and user devices. The method includes that a first user device detects a second reference signal sent by a second user device; the first user device sends a synchronization parameter according to a detected result; and according to the synchronization parameter, the second user device confirms a data transmission timing when the second user device carries out device-to-device (D2D) communication with the first user device. The method solves the technical problem that during the communication process in the prior art, a tradition cellular communication mode cannot be continuously used for achieving that service data are directly transmitted between user experience (UE), the purpose that under the situation that synchronization is successful, the D2D data sending timing is confirmed between the user devices is achieved, and therefore the technical effect of achieving the D2D communication in a cellular is achieved under the situation that complexity of the user devices is not remarkably increased.

Description

technical field [0001] The present invention relates to the communication field, in particular, to a device-to-device communication method and system, and user equipment. Background technique [0002] Because the cellular communication system realizes the multiplexing of limited spectrum resources, the wireless communication technology has been developed vigorously. In a cellular system, when there is a service to be transmitted between two user equipments (UE1), the service data from user equipment 1 (UE1) to user equipment 2 (UE2) will first be transmitted to the base station through the air interface 1. Base station 1 transmits the user data to base station 2 through the core network, and base station 2 then transmits the above service data to UE2 through the air interface. The service data from UE2 to UE1 is transmitted using a similar processing flow. like figure 1 As shown, when UE1 and UE2 are located in the same cell, although base station 1 and base station 2 are...

Claims

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Application Information

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IPC IPC(8): H04W56/00
Inventor 吴栓栓梁枫戴博李儒岳袁弋非毕峰杨瑾袁明
Owner ZTE CORP
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