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Resolve ambiguity regarding source cell for obtaining wireless device context for successful rrc connection re-establishment to target cell

A wireless device and connection reconstruction technology, applied in connection management, wireless communication, electrical components, etc., can solve problems such as long service interruption time and call drop

Inactive Publication Date: 2021-05-11
TELEFON AB LM ERICSSON (PUBL)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this comes at a cost in terms of signaling (e.g. S1 Application Protocol (S1AP) context release, Evolved Packet System (EPS) bearer update, RRC connection establishment, etc.) and a longer service interruption time
In the case of Voice over Long Term Evolution (VoLTE) calls, this can lead to dropped calls

Method used

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  • Resolve ambiguity regarding source cell for obtaining wireless device context for successful rrc connection re-establishment to target cell
  • Resolve ambiguity regarding source cell for obtaining wireless device context for successful rrc connection re-establishment to target cell
  • Resolve ambiguity regarding source cell for obtaining wireless device context for successful rrc connection re-establishment to target cell

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Embodiment Construction

[0064] The embodiments set forth below present information to enable those skilled in the art to practice the embodiments and illustrate the best mode of practicing the embodiments. After reading the following description in light of the accompanying drawing figures, those skilled in the art will understand the concepts of the disclosure and will recognize applications of these concepts not specifically addressed herein. It is to be understood that these concepts and applications fall within the scope of the disclosure and the appended claims.

[0065] Systems and methods are disclosed for providing an improved success rate for connection re-establishment in a cellular communication system. Before describing embodiments of the present disclosure, however, it is instructive to discuss certain situations in which radio resource control (RRC) connection re-establishment failures may occur. It is worth noting that although the description herein focuses on 3rd Generation Partners...

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Abstract

Systems and methods are disclosed for providing an improved success rate for connection re-establishment in a cellular communication system. Embodiments of a radio access node in a cellular communication system are disclosed which enable connection re-establishment of a wireless device to a target cell controlled by the radio access node. In some embodiments, the radio access node is operative to: (a) perform acquisition of the wireless device from two or more candidate source cells for the wireless device in response to a connection re-establishment request from the wireless device wireless device context acquisition of context, and (b) receiving wireless device context from at least one candidate source cell of the two or more candidate source cells for the wireless device in response to performing the wireless device context acquisition. By performing multiple context acquisitions, the radio access node alleviates the problem of physical cell identifier ambiguity.

Description

[0001] related application [0002] This application claims priority to US Patent Application Serial No. 14 / 565,544, filed December 10, 2014, the disclosure of which is incorporated herein by reference in its entirety. technical field [0003] The present disclosure relates to cellular communication systems, and more particularly to radio resource control (RRC) connection re-establishment procedures for cellular communication systems. Background technique [0004] In radio access networks, if the connection between a user equipment (UE) and the radio access network is lost, it is common for the UE to re-establish a connection to a server (eg a radio access node). Loss of connection is usually due to poor radio conditions, such as low signal strength, high interference, or both. In 3rd Generation Partnership Project (3GPP) Long Term Evolution (LTE) systems, one such procedure is defined in Section 5.3.7 of 3GPP Technical Specification (TS) 36.331 Version 11.9.0 (Release 11) ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04W36/00H04W88/08
CPCH04W36/0033H04W88/08H04W36/0079H04W76/19H04W76/20
Inventor 史蒂芬·格兰特塔尔莫·库宁加斯
Owner TELEFON AB LM ERICSSON (PUBL)
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