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Quick recovery method and system for failure of multiple connection nodes in communication system

A communication system and rapid recovery technology, applied in connection management, wireless communication, electrical components, etc., can solve problems such as the time of large service interruption, and achieve the effect of improving robustness, reducing service interruption time, and improving user experience.

Active Publication Date: 2021-04-06
上海微波技术研究所(中国电子科技集团公司第五十研究所)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Similarly, at this time, the UE can only initiate the network search and access process at the SN or other nodes again, and there is a large time for service interruption

Method used

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  • Quick recovery method and system for failure of multiple connection nodes in communication system
  • Quick recovery method and system for failure of multiple connection nodes in communication system
  • Quick recovery method and system for failure of multiple connection nodes in communication system

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Embodiment 1

[0047] According to the present invention, a fast recovery method is proposed when a multi-connection node fails. When the MN initiates a secondary node addition request to the SN, that is, the handover preparation information for subsequent possible handover to the SN is pre-carried to the SN in advance. , and request the SN to establish SRB3 to provide a part of the control plane guarantee in advance for subsequent node failures.

[0048] For node failure detection, there are two detection methods as follows:

[0049] 1. SCTP status detection: The SCTP link status detection is used between the MN node and the SN node. Since the heartbeat detection time of the SCTP link is usually slow, the transmission confirmation detection mechanism of the data packet is mainly used here. The detection timer parameters are configured by the MN or SN as required.

[0050] 2. RLF detection: The UE performs RLF detection on the node's wireless link failure, which mainly relies on the out-of-...

Embodiment 2

[0065] Such as figure 2 , according to the fast recovery method when the multi-connection node in the communication system provided by the present invention fails, comprising:

[0066] Step 0a. The UE accesses the primary node cell, and establishes a radio bearer to transmit user service data;

[0067] Step 0b. The UE reports that the signal quality of the SN cell meets the requirement of dual connectivity.

[0068] Step 1. The MN initiates a secondary node addition request to the SN, requesting the SN to establish SRB3 and DRB, and carrying handover preparation related information. Handover preparation related information includes the UE identity from the MN to the core network, the AS security key allocated by the MN to the SN, and the RRC related configuration of the MN.

[0069] Step 2a. SN establishes SRB3 and DRB.

[0070] Step 2b. Maintain handover preparation related information carried by the MN.

[0071] Step 3. The SN encapsulates the dual connectivity indicati...

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Abstract

The invention provides a quick recovery method and system for failure of multiple connection nodes in a communication system. The method comprises the following steps of: 1, requesting an auxiliary node base station to establish a signaling radio bearer SRB3 for a terminal, packaging switching preparation information and sending the switching preparation information to an auxiliary node; 2, performing link state detection between the main node and the auxiliary node through a flow control transmission protocol SCTP; 3, enabling the terminal to perform wireless link failure detection on the main node according to an out-of-step detection mechanism of a main node physical layer; 4, when detecting that the main node fails, starting switching for the auxiliary node, and enabling the auxiliary node base station to carry switching preparation information and a packaging switching instruction on the SRB3 and send the switching preparation information and the packaging switching instruction to the terminal; and 5, after the terminal receives the packaging switching instruction, changing the auxiliary node into the main node. According to the invention, when a certain base station node fails, the terminal can quickly switch the control plane and the user plane to the non-failed nodes, so that the robustness of the system is improved, the service interruption time of a user is reduced, and the user experience is improved.

Description

technical field [0001] The present invention relates to the technical field of mobile communication, in particular to a fast recovery method and system when a multi-connection node fails in a communication system. Background technique [0002] In a mobile communication system, dual connectivity (DC, Dual-Connectivity) is an important technology introduced by 3GPP Release-12. Through the dual connection technology, the packet data services of multiple base station nodes can use the existing non-ideal backhaul (non-ideal backhaul) X2 or Xn interface to realize the aggregation and distribution of user service data at the packet data convergence (PDCP) layer , providing higher throughput for the terminal (UE), bringing higher resource utilization, lower system switching delay, and better robustness of the wireless link to the network. [0003] However, the existing dual-connection architecture also has certain defects in the robustness of the control plane and the user plane. F...

Claims

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Application Information

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IPC IPC(8): H04W76/18
CPCH04W76/18
Inventor 陈瑞欣李雷敏刘为周晓玲俞春祥
Owner 上海微波技术研究所(中国电子科技集团公司第五十研究所)
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