Device-to-device sending method, receiving method, scheduling method and corresponding devices

A receiving method and equipment technology, applied in the direction of connection management, transmission path sub-channel allocation, digital transmission system, etc., can solve problems such as not being optimal

Inactive Publication Date: 2016-10-05
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The characteristic of D2D broadcast communication is that there is no HARQ ACK feedback, and for unicast communication, this method is obviously not optimal

Method used

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  • Device-to-device sending method, receiving method, scheduling method and corresponding devices
  • Device-to-device sending method, receiving method, scheduling method and corresponding devices
  • Device-to-device sending method, receiving method, scheduling method and corresponding devices

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0068] This embodiment provides a device-to-device data packet receiving method, such as image 3 shown, including the following steps:

[0069] Step 110, the first UE receives the D2D data packet sent by the second UE;

[0070] The first UE may determine a resource for receiving the D2D data packet according to an indication in the control signaling sent by the network side device or the second UE, and receive the D2D data packet sent by the second UE in the resource. The control signaling sent by the network side device or the second UE carries a parameter for instructing to receive the D2D data packet. The parameter used to indicate the reception of the D2D data packet may be a bitmap (bitmap), which indicates the position of the subframe for receiving the D2D data packet.

[0071] Step 120, the first UE checks the received D2D data packet and sends feedback information indicating the check result, the feedback information is an acknowledgment (ACK for short) or a negativ...

Embodiment 2

[0117] This embodiment provides a method for sending D2D data packets, such as Figure 4 shown, including the following steps:

[0118] Step 210, the second UE transmits a D2D data packet to the first UE;

[0119] The second UE may transmit the D2D data packet to the first UE according to the scheduling of the base station.

[0120] Step 220, when the second UE receives the feedback information indicating the verification result sent by the first UE and the feedback information is NACK, or receives the authorization information sent by the network side device for indicating the retransmission of the D2D data packet , retransmit the D2D data packet to the first UE.

[0121] This embodiment is a sending method corresponding to the receiving method in Embodiment 1, and the two methods have correlations. For various implementation modes of the method in this embodiment, refer to the description and examples in Embodiment 1.

[0122] The subframe in which the first UE sends feed...

Embodiment 3

[0140] This embodiment provides a D2D communication scheduling method, such as Figure 5 shown, including:

[0141] Step 310, the network side device sends first authorization information to the second UE, and the first authorization information is used to schedule the second UE to send a D2D data packet to the first UE;

[0142] Step 320, receiving feedback information sent by the first UE for indicating the D2D data packet verification result, the feedback information being ACK or NACK;

[0143] Step 330, if the received feedback information is NACK, send second grant information to the second UE, where the second grant information is used to schedule the second UE to retransmit the D2D data packet.

[0144] In the above step 320, the network side device determines that the subframe with the fifth preset interval between the subframe sending the D2D data packet is the feedback subframe for the first UE to send feedback information, and the fifth preset interval is The fixe...

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Abstract

The invention discloses a device-to-device (D2D) sending method, a device-to-device (D2D) receiving method, a device-to-device (D2D) scheduling method and corresponding devices. The objective of the invention is to improve the transmission efficiency of device-to-device (D2D) communication. The receiving method includes the following steps that: UE1 receives a D2D data packet sent by UE2; and the UE1 checks the D2D data packet and sends feedback information indicating a check result, wherein the feedback information is an ACK or an NACK, if the feedback information is an NACK, the retransmission of the D2D data packet is received. The sending method includes the following steps that: the UE2 transmits the D2D data packet to the UE1; and when the feedback information which is sent by the UE1 and received by the UE2 is an NACK, or the UE2 receives authorization information sent by network side equipment, the UE2 re-transmits the D2D data packet to the UE1. The scheduling method includes the following steps that: the network side equipment sends first authorization information to the UE2 and schedules the UE2 to send the D2D data packet to the UE1; and if the feedback information which is sent by the UE1 and received by the network side equipment is an NACK, the network side equipment sends second authorization information to the UE2 and schedules the UE2 to re-transmit the D2D data packet.

Description

technical field [0001] The present invention relates to the field of wireless communication, in particular to a device-to-device sending, receiving and scheduling method and a corresponding device. Background technique [0002] With the diversification of mobile communication services, for example, the popularization of applications such as social networking and electronic payment in wireless communication systems, the demand for service transmission between users in close proximity is increasing. Therefore, a device-to-device (Device-to-Device, D2D for short) communication mode has increasingly received widespread attention. D2D means that service data is directly transmitted from the source user equipment (User Equipment, referred to as UE) to the target user equipment through the air interface without being forwarded by the base station and the core network. It can also be called Proximity Service (Proximity Service, referred to as ProSe). For short-distance communicatio...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L1/16H04L1/18
CPCH04L1/1819H04L1/1854H04L1/1861H04L1/1896H04L5/0055H04W76/14
Inventor 吴栓栓戴博陈琳郁光辉贺海港黄莹
Owner ZTE CORP
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