Scell radio link monitoring and radio link failure handling

A secondary serving cell and radio link technology, applied in the field of RLM and RLF processing, can solve problems such as spurious, wrong UL timing, inter-symbol interference, etc.

Active Publication Date: 2013-01-09
HFI INNOVATION INC
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Problems solved by technology

RLF detection when a physical layer problem occurs is only used for PCELL, and cannot prevent SCELL from interfering with other users when it is out-of-sync
For example, if a radio link problem occurs in the DL SCELL used as a timing reference cell, it will cause wrong UL timing, causing inter symbol interferen...

Method used

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  • Scell radio link monitoring and radio link failure handling
  • Scell radio link monitoring and radio link failure handling
  • Scell radio link monitoring and radio link failure handling

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Embodiment Construction

[0026] Reference will be made in detail to various embodiments of the invention, and the accompanying drawings are made to illustrate embodiments of the invention.

[0027] In a 3GPP LTE network, there may be multiple carrier aggregation deployment scenarios, such as inter-entity carrier aggregation, inter-eNB / intra-RAT carrier aggregation, and inter-eNB / inter-RAT carrier aggregation. In the above carrier aggregation deployment scenario, the UL timing advance value and DL path loss estimation of UL power control are different according to different paths, entities, frequency bands and / or RATs. In this way, the aggregated component carriers of the UE are divided into several groups of CCs. CCs in the same CC group share the same timing advance value and / or share the same path loss value. In each group of CCs, one CC is selected as the path loss reference CC, where the UL transmit power can be calculated based on the DL path loss estimated by the path loss reference CC. Simila...

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Abstract

A method of radio link monitoring (RLM) and radio link failure (RLF) handling over a secondary serving cell (SCELL) is proposed. In a wireless network, a user equipment (UE) establishes a radio resource control (RRC) connection with a base station (eNB). The UE applies carrier aggregation for multiple component carriers (CCs) configured as multiple serving cells. The UE performs radio link monitoring over a primary serving cell (PCELL). The UE also performs radio link monitoring over a secondary serving cell (SCELL). The SCELL belongs to a CC group of one or more CCs, and used as a reference cell for the CC group. When SCELL performance is below pre-defined criteria, the UE and the eNB apply certain actions over the SCELL or all CCs in the CC group. The proposed SCELL RLM/RLF handling prevents spurious and uncontrollable uplink SCELL transmission and interference to other UEs.

Description

[0001] cross reference [0002] The claims of this application are based on 35 U.S.C. §119 requiring priority of U.S. Provisional Application No. 61 / 481,850, filed May 3, 2011, titled "Secondary Serving Cell Radio Link Monitoring and Radio Link Failure Handling" right, and this application is incorporated by reference. technical field [0003] The present invention relates to Radio Link Monitoring (RLM) and Radio Link Failure (RLF) handling, and in particular to Secondary Serving Cell with Carrier Aggregation (CA) , RLM and RLF processing in SCELL). Background technique [0004] In the third generation mobile communication cooperation plan (3 rd In the Long Term Evolution (LTE) network of Generation Partnership Project, 3GPP), the Evolved Universal Terrestrial Radio Access Network (Evolved Universal Terrestrial Radio Access Network, E-UTRAN) may include multiple base stations, for example, to communicate with multiple mobile An evolved base station (evolved Node-B, eNB)...

Claims

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Application Information

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IPC IPC(8): H04W24/00H04W74/08H04L5/00
CPCH04W36/30H04W36/0083H04W76/18H04W76/15H04W36/0085H04W36/305H04W76/19H04L5/001H04W72/542H04J11/005H04L5/006H04W24/02
Inventor 林香君波·乔·麦可·康森恩陈义升
Owner HFI INNOVATION INC
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