SCELL RADIO LINK MONITORING AND RADIO LINK FAILURE HANDLING
First Claim
1. A method, comprising:
- establishing a radio resource control (RRC) connection by a user equipment (UE) with a base station, where the UE applies carrier aggregation for multiple component carriers (CCs);
performing radio link monitoring by the UE over a primary serving cell (PCELL);
performing radio link monitoring by the UE over a secondary serving cell (SCELL), wherein the SCELL belongs to a group of one or more CCs; and
applying an action when SCELL performance is below pre-defined criteria, wherein the action is applied over the SCELL or all CCs in the group.
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Accused Products
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.
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Citations
21 Claims
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1. A method, comprising:
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establishing a radio resource control (RRC) connection by a user equipment (UE) with a base station, where the UE applies carrier aggregation for multiple component carriers (CCs); performing radio link monitoring by the UE over a primary serving cell (PCELL); performing radio link monitoring by the UE over a secondary serving cell (SCELL), wherein the SCELL belongs to a group of one or more CCs; and applying an action when SCELL performance is below pre-defined criteria, wherein the action is applied over the SCELL or all CCs in the group. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8)
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9. A user equipment (UE), comprising:
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a radio resource control (RRC) connection management module that establishes an RRC connection with a base station, where the RRC connection is established over multiple component carriers (CCs); a radio link monitoring module that performs radio link monitoring over a primary serving cell (PCELL) and over a secondary serving cell (SCELL), wherein the SCELL belongs to a group of one or more CCs; and an SCELL configuration module that applies an action when SCELL performance is below a pre-defined criteria, wherein the action is applied over the SCELL or all CCs in the group. - View Dependent Claims (10, 11, 12, 13, 14, 15, 16)
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17. A method, comprising:
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establishing a radio resource control (RRC) connection with a user equipment (UE), where the RRC connection is established over multiple component carriers (CCs); configuring one or more CCs as a CC group for the UE, wherein the group includes one secondary serving cell (SCELL); receiving a notification from the UE, wherein the notification contains at least one of a detected radio link failure of the SCELL, a deactivation of the SCELL, availability of problem event information gathered for the SCELL, and the problem event information gathered for the SCELL; and applying an action based on the received notification, wherein the action is applied over the SCELL and/or all CCs in the group. - View Dependent Claims (18, 19, 20, 21)
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Specification