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Data transmission method and equipment for use in V2X (Vehicle to Vehicle/Pedestrian/Infrastructure/Network) communication

A technology for sending data and resources, applied in the field of V2X communication methods and equipment, can solve problems affecting the performance of V2X communication systems, and achieve the effect of reducing power loss and energy loss

Pending Publication Date: 2018-02-23
BEIJING SAMSUNG TELECOM R&D CENT +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the random resource selection method cannot avoid resource collision and in-band leakage interference (IBE, In-Band Emission) between different UEs. When the number of PUEs is large, it will seriously affect the performance of the V2X communication system
[0008] Through the above analysis, it can be seen that in the P2V communication scenario, a resource selection method that can reduce power consumption and avoid mutual interference between UEs is needed, but there is no such method publicly available

Method used

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  • Data transmission method and equipment for use in V2X (Vehicle to Vehicle/Pedestrian/Infrastructure/Network) communication
  • Data transmission method and equipment for use in V2X (Vehicle to Vehicle/Pedestrian/Infrastructure/Network) communication
  • Data transmission method and equipment for use in V2X (Vehicle to Vehicle/Pedestrian/Infrastructure/Network) communication

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Embodiment 1

[0060] In this embodiment, the UE takes W as the size of the channel detection window, where W≥Wm. In subframe n, the UE determines the channel selection window corresponding to the channel detection window, and then selects transmission resources in the channel selection window. According to the method of this embodiment, the UE can autonomously determine the size and position of the channel detection window, and when to adjust the channel detection window. However, the UE needs to ensure that at any point in time, there are at least Wm subframes in the resource detection window that have experienced more than one channel detection, so that the UE always has valid channel detection results as the basis for channel selection. The specific method is as follows:

[0061] Step 210: UE determines a channel detection window.

[0062] In this embodiment, the size W of the channel detection window should not be smaller than Wm, and the value of W can change during the entire channel...

Embodiment 2

[0074] In this embodiment, the UE uses Wm as the size of the channel detection window. When certain conditions are met, the UE changes the position of the channel detection window. There is overlap. The UE determines a channel selection window according to the channel detection window, and then selects transmission resources within the channel selection window. Because the UE always performs channel detection with a channel detection window whose size is Wm, the energy consumption of the UE can be reduced to the greatest extent. However, after the UE changes the channel detection window, the UE may need to perform resource selection before completing one channel detection for the new resources in the channel detection window. At this time, the new resources in the channel detection window cannot be used as a reference for channel selection. Therefore, if the UE cannot determine the channel selection window, or if there are no available resources in the channel selection windo...

Embodiment 3

[0090] In this embodiment, the UE uses Wm as the size of the channel detection window. When certain conditions are met, the UE can expand the size of the channel detection window. The expanded channel detection window must be a superset of the original channel detection window. Before the detection window I*P, the UE needs to perform channel detection on the resources in the original channel detection window and the newly introduced resources at the same time, so as to ensure that there is still effective channel detection before completing I channel detection on the new resources in the channel detection window The result serves as a reference for channel selection. After extending the channel detection window I*P ms, the UE shall reduce the channel detection window to Wm again. The specific method is as follows:

[0091] Step 410: UE determines a channel detection window.

[0092] In this embodiment, the size of the channel selection window is Wm, and the distribution of W...

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Abstract

The application provides a data transmission method for use in V2X (Vehicle to Vehicle / Pedestrian / Infrastructure / Network) communication. According to the technical scheme of the application, UE (UserEquipment) only performs channel detection in a relatively small number of subframes within each cycle, so that the power consumption of the UE can be lowered effectively. The size of a detection window of the UE for performing channel detection can be no less than a standard defined minimum value Wm, or the UE takes the Wm as the size of the channel detection window in a stable state. The UE cantemporarily enlarge the channel detection window or change the location of the channel detection window when specific conditions are satisfied, so that a valid channel detection result can be obtainedduring channel selection. The UE can preferably select transmission resources according to the channel detection result. When the channel detection result is unavailable, or resources within a detection range cannot meet the demands of the UE, a random resource selection way can be adopted to make up. Through adoption of the method provided by the application, the performance of the V2X communication can be ensured with relatively low complexity, and meanwhile the energy loss of the UE is reduced effectively.

Description

technical field [0001] The present application relates to the technical field of mobile communication, and in particular, the present application relates to a V2X (Vehicle to Vehicle / Pedestrian / Infrastructure / Network) communication method and device. Background technique [0002] At present, the device-to-device (D2D) communication technology has been accepted by the 3GPP standard due to its great potential value in the field of public safety and ordinary civilian communication, and has been implemented in 3GPP Rel-12 and Rel-13. Standardization of some functions. Currently, the 3GPP Rel-12 standard defines two modes of D2D broadcast communication, referred to as Mode 1 (Mode 1) and Mode 2 (Mode 2) for short. [0003] Mode 1 requires that the UE sending the D2D broadcast communication must be a UE under the coverage of the cellular network. The UE obtains the configuration information of the physical sidelink control channel (PSCCH, Physical Sidelink Control CHannel) resou...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W72/04H04W72/08H04W74/00H04W74/08H04W72/54
CPCH04W72/0446H04W74/0858H04W72/1263H04W74/002Y02D30/70
Inventor 张世昌李迎阳王轶
Owner BEIJING SAMSUNG TELECOM R&D CENT