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Communication method under wireless base station separation architecture, functional entity and wireless base station

A separate architecture and wireless base station technology, applied in wireless communication, connection management, network traffic/resource management, etc., can solve problems such as the impact of UE control plane processing delay

Active Publication Date: 2018-09-14
ZTE CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The speed of light on single-mode fiber is about 200,000 km / s. Assuming that the distance between CU and DU is 100 km, the theoretical value of each signaling delay is about 0.5 ms. With so many network interaction steps between CU and DU, the UE control plane Processing latency has a big impact

Method used

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  • Communication method under wireless base station separation architecture, functional entity and wireless base station
  • Communication method under wireless base station separation architecture, functional entity and wireless base station
  • Communication method under wireless base station separation architecture, functional entity and wireless base station

Examples

Experimental program
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Embodiment 1

[0074] In related technologies, the CU is mainly responsible for processing high-level protocols, DU is responsible for processing low-level protocols, and there are multiple DUs under one CU. Such as figure 2 As shown, usually the CU control plane has a UE control management module and a radio resource management module, which are used to complete UE identification allocation and UE instance state management, UE context management, maintenance of the relationship between the UE instance and the base station external interface, UE process control, and radio resource management , CU and DU transmission tunnel application, protocol stack configuration (including all protocol stacks on CU and DU), mobility management, security algorithm selection and configuration and other functions. The DU control plane transparently transmits the signaling between the base station and the UE through the protocol stack, performs DU transmission tunnel configuration, and cooperates with the CU to...

Embodiment 2

[0128] The RRC connection establishment method of this embodiment is as follows Figure 8 As shown, it includes: step 310, the DU receives the RRC connection request message sent by the UE; step 320, the DU allocates the DU-side UE identity to the UE, creates a UE instance, and performs the admission processing of the first signaling radio bearer SRB1 After successful acceptance, send an RRC connection establishment message to the UE; step 330, after receiving the RRC connection establishment complete message sent by the UE, the DU sets the status of the UE to connected. It should be noted that the meaning of the above "RRC connection request message" should be understood as "RRC message for requesting the establishment of an RRC connection", and should not be understood mechanically as the name of the RRC message must be "RRC connection request message". The name of the RRC message may change in different systems, but as long as it is used to request the establishment of an RRC...

Embodiment 3

[0139] This embodiment also provides a UE initial context establishment method, which is applied to the DU side, such as Picture 9 As shown, it includes: step 410, the DU receives the UE context establishment request message sent by the CU, performs radio resource admission and tunnel establishment processing according to the UE context information, and completes the radio resource configuration of the protocol stack; step 420, the DU According to the successfully admitted radio resources, after interacting with the UE to complete the RRC connection reconfiguration, send a UE context establishment response message to the CU.

[0140] In this embodiment,

[0141] The DU performs radio resource admission and tunnel establishment processing according to the context information, and completes the radio resource configuration of the protocol stack, including: the DU performs the second signaling radio bearer SRB2 and data according to the evolved radio access bearer ERAB establishment l...

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Abstract

The invention discloses a communication method under a wireless base station separation architecture, a functional entity and a wireless base station, and the method comprises the following steps: a distributed unit DU with all control panel protocol stacks of an air interface side receives a radio resource control RRC message sent by UE; the DU decodes and identifies the RRC message, and terminates the RRC protocol on the DU; the DU executes RRC connection control if the DU identifies that the message sent by the UE is the RRC message requesting for building a RRC connection, and the DU interacts with the UE to complete a RRC connection building flow. The invention also provides a corresponding functional entity and a wireless base station. With the method, the functional entity and the wireless base station, processing delay of a control plane flow can be reduced.

Description

Technical field [0001] The present invention relates to the field of wireless communication, and in particular to a communication method, functional entities and wireless base stations under a wireless base station separation architecture. Background technique [0002] In the 3GPP standard, GNB (5G base station) can be divided into two functional entities: CU (Centralized Unit, centralized unit) and DU (Distributed Unit, distributed unit). figure 1 It is an exemplary split method of the protocol stack of related technologies between CU and DU. figure 1 The RRC (Radio Resource Control, radio resource control) is the radio resource control protocol stack of the air interface; the PDCP (Packet Data Convergence Protocol) layer is the data aggregation protocol stack; RLC (Radio Link Control, radio link control) ) Is the wireless link control layer; high MAC (High MAC) and low MAC (Low MAC) are obtained by segmenting the MAC (Medium Access Control, media access control protocol) protoco...

Claims

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Application Information

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IPC IPC(8): H04W36/00
CPCH04W36/0033H04W36/087H04W28/16H04W88/085H04W76/10H04W76/12H04W36/06H04W76/25H04W76/11H04W76/27H04W36/0038
Inventor 吴国栋周强
Owner ZTE CORP
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