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A layer 2 processing method, cu and du

A processing method and technology for indicating information, applied in the field of communication, can solve problems such as no clear solution, and achieve the effect of improving user experience and system efficiency

Active Publication Date: 2021-06-18
DATANG MOBILE COMM EQUIP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, after the introduction of the CU-DU architecture, there is currently no clear solution for how to cooperate between the CU and the DU to complete important functions including bearer conversion and security key update.

Method used

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  • A layer 2 processing method, cu and du
  • A layer 2 processing method, cu and du
  • A layer 2 processing method, cu and du

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0090] Example 1 is that in a multi-connection scenario, the MN sends key replacement instruction information to the CU (or CU-CP) of the SN, or other relevant information that triggers the reset of the SN layer 2, so as to complete the corresponding layer 2 processing. Specifically, see Figure 4 As shown, the layer 2 processing includes the following steps:

[0091]Step 41: The MN sends key replacement instruction information to the CU of the SN, or other relevant information that triggers the reset of the SN layer 2.

[0092] Step 42: The CU sends layer 2 reset indication information (also referred to as synchronous reconfiguration indication information) to the DU to which it belongs.

[0093] Wherein, the layer 2 reset indication information can be sent through an indication bit in the UE context modification message, or can be sent through the UE mobility instruction message (but does not carry the RRC container).

[0094] Step 43: The DU performs a layer 2 reset opera...

example 2

[0106] Example 2 is that the CU (or CU-CP) needs to change the secret key, or decides to trigger the layer 2 reset operation of the node according to the preset rules. Specifically, see Figure 5 As shown, the layer 2 processing includes the following steps:

[0107] Step 51: The CU sends request synchronous reconfiguration indication information to the DU to which it belongs.

[0108] Wherein, the synchronous reconfiguration indication information may be sent through an indication bit in the UE context modification message.

[0109] Step 52: After receiving the request synchronous reconfiguration indication information from the CU, the DU generates a response message and sends it to the CU. Wherein, the response message carries synchronous configuration parameter information (such as RACH configuration information, etc.), and the synchronous configuration parameter information can be sent to the CU through an RRC container.

[0110] Step 53: The CU generates an RRC reconfi...

example 3

[0118] Example 3 is that in a multi-connection scenario, the MN sends bearer type conversion instruction information to the CU (or CU-CP) of the SN, or other relevant information that triggers the SN to reestablish a logical channel, so as to complete the corresponding layer 2 processing. Specifically, see Figure 6 As shown, the layer 2 processing includes the following steps:

[0119] Step 61: The MN sends bearer type conversion indication information to the CU of the SN, or other relevant information that triggers the SN to reestablish a logical channel.

[0120] Step 62: The CU sends channel reestablishment indication information to the DU to which it belongs.

[0121] Wherein, the channel re-establishment instruction information is used to indicate the bearer of the logical channel to be re-established and to instruct the DU to perform a logical channel re-establishment operation on the bearer of the logical channel to be re-established. The channel reestablishment indi...

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Abstract

The present invention provides a layer 2 processing method, CU and DU, wherein the layer 2 processing method includes: sending channel reconstruction indication information to the DU, receiving a response message sent by the DU, and generating an RRC reconfiguration message according to the response message , sending the RRC reconfiguration message to the UE, and the UE performs corresponding operations. The solution of the present invention enables the CU to control the DU to perform specific layer 2 behaviors to meet different characteristic requirements, and the DU can also perform specific behaviors according to the instructions from the CU, thus clarifying the relationship between the CU and the DU under the CU-DU architecture. How to cooperate to complete important functions including bearer conversion and security key update, improve system efficiency, and enhance user experience.

Description

technical field [0001] The present invention relates to the technical field of communication, and in particular to a layer 2 processing method, CU and DU. Background technique [0002] In the future development of mobile communication systems, in order to better meet user needs and greatly increase network capacity and throughput, more transmission nodes and greater transmission bandwidth will be introduced. In the fifth-generation mobile communication (5th-Generation, 5G for short) system, in order to have a larger bandwidth and a higher transmission rate, it will be an inevitable trend to introduce high-frequency small cells. Since the local centralized management of the high-frequency small stations will bring centralized processing gains, a Central Unit (CU for short)-Distributed Unit (DU for short) architecture is introduced. [0003] At present, in the Long Term Evolution (LTE for short) system, most of the nodes on the network side are connected by wires, that is, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W56/00
CPCH04W56/00H04W36/0055H04W92/12H04W76/25H04W80/02H04W88/085H04W76/20H04W92/04H04W92/10H04W12/037H04W12/0431
Inventor 张大钧刘爱娟孙建成
Owner DATANG MOBILE COMM EQUIP CO LTD