Used method, main base station and user equipment in dual-connectivity system

A technology of user equipment and primary base station, which is applied in connection management, electrical components, wireless communication, etc., and can solve problems such as the inability to restore the connection of secondary base stations autonomously

Active Publication Date: 2015-11-25
ALCATEL LUCENT SHANGHAI BELL CO LTD +1
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Problems solved by technology

[0009] 4. The UE cannot restore the connection to the secondary base station autonomously, but

Method used

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  • Used method, main base station and user equipment in dual-connectivity system
  • Used method, main base station and user equipment in dual-connectivity system
  • Used method, main base station and user equipment in dual-connectivity system

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Embodiment Construction

[0047] Hereinafter, the principle and spirit of the present invention will be described with reference to several exemplary embodiments shown in the accompanying drawings. It should be understood that these embodiments are described only to enable those skilled in the art to better understand and implement the present invention, but not to limit the scope of the present invention in any way.

[0048] In a conventional single connection system, when RLF is detected, a re-establishment procedure and cell reselection are performed. In the dual connectivity system, although S-RLF does not need to be re-established, because there is still a connection with the primary base station, the primary base station is responsible for deciding the operation when receiving the S-RLF indication from the UE.

[0049] figure 1 An example method 100 for a primary base station in a dual connectivity system according to an embodiment of the present invention is shown.

[0050] In step 101, when a...

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Abstract

The invention provides a method for a main base station in a dual-connectivity system. The method comprises the following steps of receiving an indication to an S-RLF, a trigger reason and a measuring report of the S-RLF from user equipment UE in case of a radio link failure of a supplementary base station (the S-RLF); determining operations on the supplementary base station on the basis of the indication, the trigger reason and the measuring report; and informing the UE of the determined operations on the supplementary base station. The invention further provides a method for the user equipment in the dual-connectivity system, the related main base station and user equipment. The invention further provides an optimized solution scheme for a UE operation process in the dual-connectivity system when the S-RLF is detected. The scheme includes a process of MAC/RLC/PDCP layers, signals between the UE and the main base station and signals between the main base station and the supplementary base station. In this way, the UE behavior is clearly defined and optimized. The dual-connectivity system is thus enabled to work with higher efficiency in case of an S-RLF condition.

Description

technical field [0001] Embodiments of the present invention generally relate to a dual connectivity system, and more particularly relate to a method used when a radio link failure of a SeNB occurs in a dual connectivity system, and a MeNB and UE performing the method. Background technique [0002] In a dual connectivity (Dual Connectivity) system, a user equipment (UE) can have two connections with both a primary base station (MeNB) and a secondary base station (SeNB), and can be served by both base stations simultaneously. Therefore, it is possible to encounter radio link failure (RLF) in the two service links respectively. In 3GPP, there have been discussions and agreements on RLF (S-RLF) in the secondary base station. Despite some agreements, there are still some open issues and the behavior of the UE is not clearly defined. [0003] In a traditional single connection system, UE has only one serving base station and only needs to handle RLF for one base station, even in...

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Application Information

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IPC IPC(8): H04W24/02H04W24/10H04W68/00H04W76/02
Inventor 温萍萍钱德瑞卡·沃拉尔
Owner ALCATEL LUCENT SHANGHAI BELL CO LTD
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