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Data transmission method and device in V2X

A technology for data information and selective transmission, which is applied in the field of communication and can solve problems such as the complexity of low SA blind detection

Inactive Publication Date: 2018-01-19
BEIJING XINWEI TELECOM TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the embodiments of the present invention is to propose a data transmission method and device in V2X, aiming to solve how to use adjacent frequency resources and have low SA blind detection when SA and data are transmitted in the same subframe complexity problem

Method used

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  • Data transmission method and device in V2X
  • Data transmission method and device in V2X

Examples

Experimental program
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Effect test

Embodiment 1

[0062] refer to figure 1 , figure 1 It is a schematic flowchart of a data transmission method in V2X provided by Embodiment 1 of the present invention.

[0063] Such as figure 1 As shown, the data transmission method in V2X includes:

[0064] Step 101, obtaining the configuration mode of the resource pool;

[0065] Specifically, the implementation subject of this embodiment is not limited to the base station or the user, and the following specific implementation manners include but are not limited to the base station or the user.

[0066] Specifically, such as figure 2 as shown, figure 2 It is a schematic diagram of a subband bandwidth division method provided by an embodiment of the present invention. The system bandwidth is divided into N subbands, where the bandwidth Bn (n=1,...N) of each subband can be the same or different, and is configured or preconfigured by the eNB.

[0067] Each subband includes two parts, respectively corresponding to an SA resource pool an...

Embodiment 2

[0077] refer to image 3 , image 3 It is a schematic flowchart of a data transmission method in V2X provided by Embodiment 2 of the present invention.

[0078] Such as image 3 As shown, the data transmission method in V2X includes:

[0079] Step 301, obtaining the configuration mode of the resource pool;

[0080] Step 302, if the bandwidth of each subband in the resource pool configured by the system is different, and the data information of the V2X message needs to occupy at least Y resource blocks in the frequency domain, then in the subframes that meet the delay requirement, according to Y's The size selects a subband with an appropriate bandwidth, and transmits control information on the resources of the control information resource pool on the selected appropriate subband, and transmits data information on the resources of the data information resource pool;

[0081] Wherein, the subbands of different bandwidths include different subbands in one subframe, or differe...

Embodiment 3

[0086] refer to Figure 5 , Figure 5 It is a schematic flowchart of a data transmission method in V2X provided by Embodiment 3 of the present invention.

[0087] Such as Figure 5 As shown, the data transmission method in V2X includes:

[0088] Step 501, obtaining the configuration mode of the resource pool;

[0089] Step 502, if the bandwidth W of each sub-band is the same, and the data information of the V2X message needs to occupy at least Y resource blocks in the frequency domain, then select M consecutive sub-bands in the sub-frame that meets the delay requirement, where M satisfies (W-X)×M≥Y;

[0090] The control information is transmitted on the resources of the control information resource pool of the M subbands, and the data information is transmitted on the resources of the data information resource pool.

[0091] Preferably, the transmission of control information on the resources of the control information resource pool of the M subbands, and the transmission...

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Abstract

The invention discloses a data transmission method and device in V2X. The method includes: obtaining a configuration mode of a resource pool; selecting a resource for transmitting a V2X message according to the acquired configuration mode of the resource pool, the size of the received V2X message and a time delay requirement. The method and device support a case that SA and data use resources withadjacent frequencies and have low SA blind detection complexity.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of communication, and in particular to a data transmission method and device in V2X. Background technique [0002] In V2X (vehicle to X) communication, a V2X message consists of SA (control information) and data (data information). The SA is used to indicate the resource location where the data is located and the transmission parameters, X resource blocks (RB) occupied in the frequency domain, and X is a fixed value. data is used to transmit V2X application data, and its data size and QoS requirements vary according to different types of services. Therefore, the number of RBs occupied in the frequency domain also varies accordingly. The SA and its associated data can be transmitted in the same subframe or in different subframes. [0003] When the SA and its associated data are transmitted in the same subframe, in order to reduce the maximum power reduction (Maximum power reduction, MP...

Claims

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Application Information

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IPC IPC(8): H04L5/00H04W28/02H04W28/26H04W40/12H04W72/00H04W72/04H04W72/06H04W72/12
Inventor 王夏男孙鹏
Owner BEIJING XINWEI TELECOM TECH
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