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A D2D discovery signal transmission method and device

A technology for discovering signals and transmission methods, applied in wireless communication, access restrictions, electrical components, etc., can solve problems such as reducing resource utilization, and achieve the effect of improving resource utilization and reducing physical resources

Active Publication Date: 2018-02-23
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] Due to radio frequency limitations, UE needs a certain transition time (20us) between sending D2D discovery signals and receiving D2D discovery signals. Therefore, when the discovered UE sends D2D discovery signals on OFDM symbol 5, the OFDM Symbol 4 and OFDM symbol 6 cannot be used to receive D2D discovery signals from other UEs, but can only be used as guard intervals for transceiving switching, thereby reducing resource utilization

Method used

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  • A D2D discovery signal transmission method and device
  • A D2D discovery signal transmission method and device
  • A D2D discovery signal transmission method and device

Examples

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Embodiment 1

[0046]Aiming at the problems existing in the prior art, Embodiment 1 of the present invention provides a method for transmitting a D2D discovery signal (that is, sending and receiving a D2D discovery signal), by using a cellular signal timing window corresponding to a physical resource (that is, a sending window and a receiving window) independent timing window, which can flexibly adjust the sending window and receiving window of the D2D discovery signal, thereby effectively reducing the physical resources occupied by the sending and receiving conversion time and improving resource utilization; Figure 4 As shown, the method includes the following steps:

[0047] Step 401, the base station device determines the physical resource occupied by the D2D discovery signal; for example, the base station device determines that the physical resource occupied by the D2D discovery signal is OFDM symbol 5.

[0048] Step 402, the base station device uses the physical resource to determine t...

Embodiment 2

[0088] Embodiment 2 of the present invention provides a method for transmitting a D2D discovery signal, using Figure 5 The illustrated schematic diagram of transmission of the D2D discovery signal is taken as an example for detailed description.

[0089] For step 401 and step 402, the base station device determines the physical resource occupied by the D2D discovery signal and the transmission window information corresponding to the D2D discovery signal; Figure 5 As shown, the D2D discovery signal occupies OFDM symbol 5, and the transmission window of the D2D discovery signal is half an OFDM symbol ahead of the cellular signal window.

[0090] For step 403, the base station equipment notifies the first UE of the physical resources used by the D2D discovery signal together with the transmission timing indication information used to determine the transmission window; the transmission timing indication information is 1-bit information, indicating that the transmission window of...

Embodiment 3

[0095] Embodiment 3 of the present invention provides a method for transmitting a D2D discovery signal, using Image 6 The illustrated schematic diagram of transmission of the D2D discovery signal is taken as an example for detailed description.

[0096] For step 401 and step 402, the base station device determines the physical resource occupied by the D2D discovery signal and the transmission window information corresponding to the D2D discovery signal; Image 6 As shown, the D2D discovery signal occupies 9 OFDM symbols, and the transmission window of the D2D discovery signal is 2 / 3 OFDM symbols ahead of the cellular signal window.

[0097] For step 403, the base station notifies the first UE of the physical resources used by the D2D discovery signal together with the transmission timing indication information used to determine the transmission window; the transmission timing indication information is 2-bit information, and is used to indicate the D2D discovery signal. The t...

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Abstract

Disclosed are a transmission method and device for a D2D discovery signal. The method comprises: a base station device determining a physical resource occupied by the D2D discovery signal; the base station device determining sending window information corresponding to the D2D discovery signal using the physical resource, wherein the sending window information is the offset of a sending window of the D2D discovery signal relative to a cellular signal window corresponding to the physical resource; the base station device sending the physical resource and the sending window information to a first UE; and the first UE sending the D2D discovery signal using the physical resource and the sending window information.

Description

technical field [0001] The present invention relates to the field of communication technology, in particular to a method and device for transmitting a D2D (Device to Device, device to device) discovery signal. Background technique [0002] In traditional cellular communication technology, the data communication process between two UEs (User Equipment, user equipment) can be as follows figure 1 As shown, services such as voice and data between two UEs need to be interacted through eNBs (that is, base station equipment) where they reside and core networks. Furthermore, D2D technology (that is, terminal direct technology) means that adjacent UEs can directly transmit data through a direct link within a short distance without forwarding through a central node (that is, eNB), such as figure 2 shown. [0003] The short-distance communication characteristics and direct communication mode of D2D technology make it have the following advantages: (1) UE short-distance direct commun...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W48/16H04W72/00
CPCH04W8/005
Inventor 陈文洪高秋彬彭莹赵锐
Owner DATANG MOBILE COMM EQUIP CO LTD
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