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Method and device for sending data packet

A data packet and data technology, applied in the field of communication, can solve the problems of difficult to meet the usecase requirements of the Internet of Vehicles, there is no mechanism to provide information on packet delay requirements, and it is difficult to ensure that data is sent to the peer end.

Active Publication Date: 2017-03-08
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Then, even if TTI (Transmission Time Interval, transmission time interval) is subsequently reduced to half of the current one, and all cycles are reduced to half, considering factors such as transmission delay and scheduling timing, it is difficult to guarantee that data will be sent to the peer within 20ms. end
[0004] Therefore, the disadvantage of the existing technology is that if the D2D technology is used to transmit related data, it is difficult to meet the various use case requirements of the Internet of Vehicles in the case of a low delay of 20ms.
[0005] Furthermore, there is currently no mechanism to provide information on the delay requirements of data packets

Method used

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  • Method and device for sending data packet
  • Method and device for sending data packet

Examples

Experimental program
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Embodiment 1

[0105] When a vehicle finds that it will inevitably collide with another vehicle, that is, the use case of pre-crash sensing warning, a related warning message will be generated at this time. The application layer attaches the delay indication information to the alarm message and sends it to the lower layer. After the MAC (Media Access Control, Media Access Control) layer receives the data packet and the delay indication information, it checks whether there is currently an authorized dedicated transmission resource. The transmission resource may be requested for other data. If it exists , then the terminal uses the sending resource to preferentially schedule the data packet of the warning message, and can continuously retransmit it multiple times. If there is currently no authorized dedicated sending resource, an adjacent sending resource is selected from the broadcast or pre-configured resource pool to send the message, which can be sent multiple times in a row. If there are...

Embodiment 2

[0107] The low-latency indication information can be carried through inter-layer primitives. For example, when the application layer sends the data to PDCP, it separately indicates the low-latency indication information. PDCP sends the data to RLC (Radio Link Control, radio link control), and RLC sends the data to MAC. The indication information is all transmitted through interlayer primitives. Forward. After the MAC is received, the resource selection and sending process in Embodiment 1 is executed according to the indication information.

Embodiment 3

[0109] In this example, the transmission indication can indicate the delay requirement through priority information.

[0110] The indication information may be bound with priority information. For example, the priority indication of data packet transmission is now 3 bits. When the 3 bits are all 1, it means that the minimum delay is sent. Then when the MAC receives this information, it executes the resource selection and resource selection in Embodiment 1. sending process.

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Abstract

The invention discloses a method and a device for sending data packet. The method comprises steps of: when an application layer generates a data packet, determining a time delay requirement when the data packet is sent according to a data packet generation reason; carrying a sending indication when the data packet is sent to an access layer, wherein the sending instruction is determined according to the time delay requirement; determining a sending resource for sending the data packet on the access layer according to the sending instruction and the current resource conditions; and sending the data packet on the sending resource. According to the invention, all kinds of time delay data transmission requirements can be met, so various time delay data packets can be transmitted to an opposite end according to corresponding time delay requirements. The invention also provides a low-time delay resource distribution scheme when the time delay requirement of sending of the data packet is determined. Furthermore, the invention also provides a scheme ensuring sending reliability of the data packet.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method and device for sending data packets. Background technique [0002] For various use cases (use cases) of the Internet of Vehicles, some use cases require a data transmission delay of 20ms, and some require a data transmission delay of 100ms or 160ms. [0003] Since the sending period provided by D2D discovery (D2D discovery) in the D2D (Device to Device, device-to-device) technology is 320ms, the scheduling period of D2D communication is 40ms. Then, even if TTI (Transmission Time Interval, transmission time interval) is subsequently reduced to half of the current one, and all cycles are reduced to half, considering factors such as transmission delay and scheduling timing, it is difficult to guarantee that data will be sent to the peer within 20ms. end. [0004] Therefore, the disadvantage of the existing technology is that if the D2D technology is used for the tr...

Claims

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Application Information

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IPC IPC(8): H04W4/00H04W72/04
CPCH04W72/20H04L65/00
Inventor 全海洋赵亚利张惠英
Owner DATANG MOBILE COMM EQUIP CO LTD
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