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Prohibiting failure indications for secondary cell group failure

A fault indication, secondary cell technology, applied in connection management, wireless communication, electrical components, etc., can solve problems such as waste of radio resources

Active Publication Date: 2017-08-18
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Too many UE failure indications may waste radio resources and load MeNB unnecessarily

Method used

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  • Prohibiting failure indications for secondary cell group failure
  • Prohibiting failure indications for secondary cell group failure
  • Prohibiting failure indications for secondary cell group failure

Examples

Experimental program
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Embodiment Construction

[0029] In the case of LTE dual connectivity, the UE failure indication when the SCG fails may be sent multiple times. This is because the evaluation of SCG PHY, SCG RACH, and SCG RLC failure detection runs in parallel and independently of each other. In LTE traditional behavior, if the T311 timer is running, the concurrent SCG PHY, RACH, and RLC failure detection is handled by avoiding subsequent triggers of re-establishment.

[0030] The embodiments described herein provide a solution for controlling multiple SCG failure trigger events in LTE dual connectivity.

[0031] Prohibited state

[0032] image 3 The UE barred state is used to minimize unnecessary UE failure indications. Once the UE triggers an SCG failure (block 302) and sends a UE failure indication message to the MeNB (block 306), the UE considers itself to be in an SCG failure state (block 304). For example, the SCG failure state may be triggered due to detection of the expiration of the SCG change failure timer, the ...

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PUM

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Abstract

In an aspect, a UE operating in a network that supports dual connectivity operation is configured to minimize the transmission of unnecessary UE failure indications. The UE detects secondary cell group (SCG)failure for the UE, in response to detecting one of a plurality of SCG failure-triggering events. The UE sends a UE failure indication message, in response to the detecting SCG failure, and refrains from sending further UE failure indication messages in response to SCG failure-triggering events, until the sending of further UE failure indication messages is reenabled. In some cases, the UE sets a state of the UE to a UE prohibit state to prohibit sending further UE failure indication messages while in the UE prohibit state. In other cases, the UE starts a prohibit timer to prohibit sending further UE failure indication messages during the prohibit timer.

Description

Technical field [0001] The present invention relates generally to wireless communication networks, and in particular, to fault detection and notification. Background technique [0002] The Third Generation Partnership Project (3GPP) is specifying an Evolved Universal Terrestrial Radio Access Network (E-UTRAN) consisting of Long Term Evolution (LTE) and System Architecture Evolution (SAE) concepts. The architecture of the LTE system is as figure 1 Shown. [0003] LTE dual connectivity is a feature defined from the perspective of user equipment (UE), where the UE can simultaneously receive data from and send data to two different eNBs. This feature is part of 3GPP Rel-12. These two different eNBs are usually denoted as primary eNodeB (MeNB) and secondary eNodeB (SeNB). MeNB and SeNB work at different frequencies, and provide separate cell groups for UE, primary cell group (MCG) and secondary cell group (SCG). [0004] Such as figure 2 As shown, the protocol architecture of the 3GP...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04W76/02
CPCH04W76/15H04W76/18H04W76/27H04W76/25H04W88/06
Inventor 里卡·苏斯泰瓦尔托尔斯滕·杜达
Owner TELEFON AB LM ERICSSON (PUBL)