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Method and device for obtaining layer 2 data packet delay

An acquisition method and data packet technology, applied in digital transmission systems, using return channels for error prevention/detection, electrical components, etc., can solve problems such as low accuracy and poor versatility, and achieve poor versatility and low accuracy , Improve the effect of user experience

Inactive Publication Date: 2018-02-02
宁夏恒信捷通信息技术服务有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the problems of low accuracy and poor versatility of the calculation method of layer 2 data packet time delay in the related art, the present invention provides a method and equipment for obtaining layer 2 data packet time delay to at least solve the above problems

Method used

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  • Method and device for obtaining layer 2 data packet delay
  • Method and device for obtaining layer 2 data packet delay
  • Method and device for obtaining layer 2 data packet delay

Examples

Experimental program
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Embodiment 1

[0083] In this embodiment, when the current bandwidth is small, the RLC layer selects the method of splitting data packets as an example for illustration. After receiving the downlink data, the PDCP layer sends it to the RLC layer. According to the size of the current bandwidth, the RLC layer It is decided to send the data packet by splitting the data packet or combining the data packet. Figure 7 It is a flow chart of a method for obtaining layer 2 data packet delay in a splitting manner according to an embodiment of the present invention, as shown in Figure 7 As shown, the method includes the following steps (S702-S712):

[0084] Step S702, the PDCP layer of the local end receives a data packet whose serial number is SN in the PDCP layer, for example, setting SN=x, the PDCP layer calculates the current time, stamps the data packet with a time stamp T1, and sends the data packet to the local end RLC layer.

[0085] Step S704, after receiving the data packet of the PDCP lay...

Embodiment 2

[0092] In this embodiment, when the current bandwidth is relatively large, the RLC layer selects a combination mode to send data packets as an example for illustration. Figure 8 It is a flowchart of a method for obtaining layer 2 data packet delay in a combined manner according to an embodiment of the present invention, such as Figure 8 As shown, the method includes the following steps (S802-S812):

[0093] Step S802, the PDCP layer at the local end receives downlink data, that is, a data packet whose sequence number is SN at the PDCP layer, for example, setting SN=1, 2,...n, the PDCP layer calculates the current time respectively, and prints each data packet separately After the time stamp T1, T2...Tn, send the data packet and the time stamp to the local RLC layer;

[0094] In step S804, after receiving the data packet of the local PDCP layer, the local RLC layer splices n PDCP data packets into one RLC data packet according to the current bandwidth. And send all PDCP SN ...

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Abstract

Disclosed are a method and a device for acquiring the delay of data packet in the second layer. The method comprises: the MAC layer acquiring and storing the receiving time of a data packet received by the PDCP layer, and sending the data packet to a correspondent terminal; after a response from the correspondent terminal is received, the MAC layer determines that the reception of the response to the data packet is complete, and acquires the response time for the data packet; and the MAC layer obtains the delay of the data packet in the second layer by subtracting the receiving time from the response time. By using the present invention, the MAC acquires and stores the receiving time of the data packet received by the PDCP layer, acquires the response time for the data packet after it determines the reception of the response for the data packet is complete, and then subtracts the receiving time from the response time to obtain the delay of the data packet in the second layer, thereby solving the problems of low accuracy and poor versatility of the method for calculating the delay of data packet in the second layer in the art.

Description

technical field [0001] The present invention relates to the field of communications, in particular to a method and device for acquiring the time delay of a layer-2 data packet. Background technique [0002] figure 1 It is a flowchart of downlink data of the user plane according to the long-term evolution (Long Term Evolution, referred to as LTE) of related technologies, such as figure 1 As shown, in the protocol stack of the evolved terrestrial radio access network node (E-URTANNodeB, referred to as eNB) and user equipment (User Equipment, referred to as UE), from the upper layer to the lower layer includes: GPRS Tunneling Protocol User Plane (GPRS Tunneling Protocol User Plane (GTPU for short) layer, Packet Data Convergence Protocol (PDCP for short) layer, Radio Link Control (RLC for short) layer, Medium Access Control (MAC for short) layer ) layer, the downlink data arrives at the eNB, is processed by the GTPU layer, PDCP layer, RLC layer, and MAC layer, and finally reac...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L1/00H04L1/16
CPCH04L43/0858H04L43/0864
Inventor 张为兴
Owner 宁夏恒信捷通信息技术服务有限公司