Data transmission method and device of D2D system

A technology of data transmission and data control, applied in the field of mobile communication, can solve the problems of signal and transmission signal scrambling, and achieve the effect of reducing the complexity of detection

Inactive Publication Date: 2015-07-29
BEIJING SAMSUNG TELECOM R&D CENT +1
View PDF0 Cites 43 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there is currently no method for scrambling D2D discovery signals and transmi

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Data transmission method and device of D2D system
  • Data transmission method and device of D2D system
  • Data transmission method and device of D2D system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0114] This embodiment discusses the specific realization of the data transmission method in the second D2D system.

[0115] Step 301: D2D UE performs synchronization detection, and acquires cluster ID and other information.

[0116] Wherein, the cluster ID information can be obtained through intra-cluster synchronization signal or cluster head broadcast.

[0117] Step 302: Determine the parameters of the sequence for transmitting D2D signals and the initial value of the scrambling code according to the cluster ID, and generate the sequence, DMRS sequence and initial value of the scrambling code c init , and send the corresponding signal.

[0118] Wherein, the manner of generating the initial value of the scrambling code sequence according to the cluster ID may be:

[0119]

[0120] or,

[0121] c init = c · 2 9 + N ID ...

Embodiment 2

[0133] This embodiment discusses the specific implementation of the data transmission method in the first D2D system. Figure 4 It is a schematic flow chart of the method in this embodiment, and the method includes the following steps:

[0134] Step 401: Obtain the ID of the synchronization source after the UE synchronizes with the synchronization source and other information.

[0135] Wherein, when the UE synchronizes with the synchronization source, it may be synchronized with the base station, or may be synchronized upon receiving a synchronization sequence forwarded by other UEs.

[0136] Step 402: The D2D UE generates D2D sequence, DMRS sequence and parameters corresponding to the initial value of D2D signal scrambling code according to the synchronization source ID and other information determined in step 401, and sends corresponding signals.

[0137] For example, the cyclic shift set by the high layer, the cyclic shift set by the physical layer, and the sequence grou...

Embodiment 3

[0143] This embodiment discusses the specific realization of the data transmission method in the second D2D system. Wherein, the ID in the SA is used as the cluster ID. Figure 5 Schematic diagram of the corresponding method flow chart, such as Figure 5 shown, including:

[0144] Step 501: D2D UE performs synchronization detection, receives SA, and obtains information such as SA ID.

[0145] Step 502: Generate the parameters of the DMRS sequence in the D2D data transmission signal according to the SA ID, and generate the sequence.

[0146] Step 503: The D2D UE receives the DMRS at a specific location according to the SA indication, and performs operations such as channel estimation according to the parameters determined in step 502 and the received DMRS.

[0147] The third method of data transmission in the D2D system in this application is introduced below.

[0148] This method proposes a method for generating the parameters of the D2D signal sequence, the DMRS sequence ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention discloses a data transmission method of a D2D system. The method comprises that synchronous detection is carried out on D2D UE; according to synchronous source information detected by the D2D UE, parameters of sequence and/or scrambling code initial value employed in subsequent D2D signal transmission are obtained, and D2D signals are sent correspondingly; and the D2D UE determines parameters of D2D signal sequence and/or D2D signal scrambling code initial value according to the synchronous source information detected by the D2D UE, and further detects D2D signals sent by other D2D UE. According to the method of the invention, interference of D2D transmission among D2D UE is randomized, the range of D2D UE of mutual discovery is ensured, and the detection complexity is reduced.

Description

technical field [0001] The present application relates to the technical field of mobile communication, in particular, the present application relates to a method for generating a sequence of a D2D signal in a D2D system and an initial value of a scrambling code, and a user equipment. Background technique [0002] In the Long Term Evolution (LTE, Long Term Evolution) system, DMRS (DeModulation Reference Signal) is used as a reference signal for demodulation. In LTE uplink, the DMRS of each UE is sent within the UE's transmission bandwidth. The DMRS sequence generation of each UE is related to the cell ID, and the DMRS signals of different cells have low cross-correlation, thereby reducing the interference from RSs sent by other cells on the same resource. The generation of the DMRS sequence is also related to the sequence number of the time slot for sending the DMRS and the cyclic shift parameter. The cyclic shift parameter is reasonably allocated to make the DMRS orthogonal ...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): H04W56/00H04L1/00
CPCH04W56/0015H04W4/70
Inventor 赵铮李迎阳张世昌
Owner BEIJING SAMSUNG TELECOM R&D CENT
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap