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A method of rebuilding nr data

An establishment method and a technique for re-establishing requests, which are applied in the field of NR data re-establishment, can solve problems such as uplink data discarding, downlink data interruption is too long, and security processing exceptions, so as to shorten data interruption delay, eliminate message flow, and improve user experience. The effect of experience

Active Publication Date: 2022-07-12
四川创智联恒科技有限公司
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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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  • A method of rebuilding nr data
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  • A method of rebuilding nr data

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Embodiment 1

[0029] Example 1, as figure 2 As shown, a method for re-establishing NR data includes 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 packet compression parameters, PDCP sequence number length, etc.; at this time, the re-establishment is not performed immediately, but only re-assignment is performed. F1-U TEID, normally handles 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 the uplink data or downlink data submission status report; The F1-U TEID sends a downlink data submission status report carrying the last frame indication to the PDCP entity;

[0032] Step 3: When the PDCP entity receives the downlink data submission ...

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Abstract

The invention discloses an NR data re-establishment method, which adopts a CU and DU cooperative re-establishment mechanism; when the control plane instructs the PDCP entity to re-establish, the PDCP entity saves the re-establishment parameters and does not perform the re-establishment immediately; when the control plane instructs the RLC entity to re-establish the The downlink is re-established, and a GTPU message carrying the downlink data submission status report indicated by the last frame is sent to the PDCP entity. After the PDCP entity has received all the last frame indications sent by the corresponding RLC entities, it performs downlink re-establishment. After the UE successfully accesses the target cell, the MAC entity notifies the RLC entity to perform uplink re-establishment; the RLC entity changes the uplink F1-U TEID. At the same time, when the PDCP entity receives the first packet transmitted through the reassigned F1-U TEID in the uplink direction, it performs uplink re-establishment. In this way, the re-establishment states of the CU and DU, the base station and the terminal are kept synchronized, and abnormal data processing is avoided during the re-establishment process.

Description

technical field [0001] The present invention relates to the technical field of wireless communication, and 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 independently deployed, such as figure 1 shown. The uplink / downlink user data is transmitted between the CU and the DU through an F1 UserPlane Interface (F1 UserPlane Interface, F1-U). [0003] In the scenario of independent CU-DU deployment, there is still no clear solution for how the CU and DU cooperate 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 instructs the...

Claims

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Application Information

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Patent Type & Authority Patents(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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