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NR data reestablishment method

A method for establishing a request and a technology for re-establishing a request, applied in the field of NR data re-establishment, can solve the problems of discarding uplink data, excessive downlink data interruption, abnormal security processing, etc., so as to shorten the data interruption delay, eliminate the message flow, and improve the user experience. The effect of experience

Active Publication Date: 2022-05-13
四川创智联恒科技有限公司
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AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to overcome the deficiencies of the prior art, solve the problems of too long downlink data interruption, uplink data discarding and abnormal security processing when the control plane indicates PDCP and RLC re-establishment, and provide a method for NR data re-establishment to coordinate CU and DU Re-establish timing to ensure normal and reliable data transmission

Method used

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Examples

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Embodiment 1

[0029] Example 1, such as figure 2 Shown, a kind of NR data reconstruction method comprises the following steps:

[0030] Step 1: When the PDCP entity receives the re-establishment request sent by the control plane, it saves the re-establishment parameters, such as security parameters, robust message compression parameters, and the length of the PDCP sequence number; at this time, the re-establishment is not performed immediately, but only reallocated F1-U TEID, normally handle downlink and uplink services;

[0031] Step 2: When the RLC entity receives the re-establishment request sent by the control plane, it immediately performs downlink re-establishment, the uplink remains unchanged, and uses the original F1-U TEID to send uplink data or downlink data to submit a status report; at the same time, through the original F1-U TEID F1-U TEID sends the downlink data submission status report carrying the last frame indication to the PDCP entity;

[0032] Step 3: When the PDCP en...

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Abstract

The invention discloses an NR data reestablishment method. A CU and DU collaborative reestablishment mechanism is adopted. When the control plane instructs the PDCP entity to reestablish, the PDCP entity stores the reestablishment parameter and does not immediately perform reestablishment; and when the control plane instructs the RLC entity to reestablish, downlink reestablishment is carried out, and a GTPU message carrying a downlink data delivery status report indicated by the last frame is sent to the PDCP entity. And after the PDCP entity receives the last frame indication sent by all the corresponding RLC entities, downlink reestablishment is carried out. When the UE successfully accesses the target cell, the MAC entity notifies the RLC entity to perform uplink reestablishment; and the RLC entity changes the uplink F1-U TEID. And meanwhile, when the PDCP entity receives the first message transmitted through the redistributed F1-U TEID in the uplink direction, uplink reestablishment is carried out. Therefore, the reestablishment states of the CU and the DU as well as the base station and the terminal are kept synchronous, and abnormal data processing in the reestablishment process is avoided.

Description

technical field [0001] The invention relates to the technical field of wireless communication, in particular to a method for re-establishing NR data. Background technique [0002] In order to enhance the flexibility of network deployment and meet different requirements in different application scenarios, the 5G wireless access network adopts a networking architecture in which the Centralized Unit (CU) and the Distributed Unit (DU) are deployed independently, such as figure 1 shown. Among them, the uplink / downlink user data is transmitted between the CU and the DU through the F1 User Plane Interface (F1 UserPlane Interface, F1-U). [0003] In the CU-DU independent deployment scenario, there is still no clear solution on how to cooperate between the CU and the DU to complete some specific functions (such as data bearer re-establishment). If the re-establishment timing coordination of CU and DU deviates, some new problems will be introduced. [0004] When the control plane i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W76/19H04W76/11H04W76/12
CPCH04W76/19H04W76/11H04W76/12
Inventor 吕磊
Owner 四川创智联恒科技有限公司
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