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AssigneeNEC Corporation
InventorsHisashi Futaki, Sadafuku Hayashi
Estimating the term…
A second RAN node (2) associated with a second RAT sends a radio resource configuration of the second RAT to a radio terminal (3) via a first RAN node (1) associated with a first RAT. The radio resource configuration explicitly or implicitly indicates at least one numerology that is included in multiple numerologies supported by the second RAT and is different from a reference numerology. It is thus, for example, possible to allow a radio terminal to be configured with a numerology of a cell served by a secondary gNB or a target gNB in Inter-RAT Dual Connectivity between E-UTRA and NR and in a handover from E-UTRA to NR.
A second radio access network (RAN) node to be used in a radio communication system configured to support a first radio access technology (RAT) and a second RAT, the second RAN node being associated with the second RAT, the second RAN node comprising:
A first radio access network (RAN) node to be used in a radio communication system configured to support a first radio access technology (RAT) and a second RAT, the first RAN node being associated with the first RAT, the first RAN node comprising:
A radio terminal to be used in a radio communication system configured to support a first radio access technology (RAT) and a second RAT, the radio terminal comprising:
A method for a second radio access network (RAN) node to be used in a radio communication system configured to support a first radio access technology (RAT) and a second RAT, the second RAN node being associated with the second RAT, the method comprising:
A method for a first radio access network (RAN) node to be used in a radio communication system configured to support a first radio access technology (RAT) and a second RAT, the first RAN node being associated with the first RAT, the method comprising:
A method for a radio terminal to be used in a radio communication system configured to support a first radio access technology (RAT) and a second RAT, the method comprising:
Dependencies are inferred from the claim text.
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The frequencies being orthogonal, e.g. OFDM or DMT: the frequencies being arranged in component carriers
Control channels or signalling for resource management: in the downlink direction of a wireless link, i.e. towards a terminal
Arrangements affording multiple use of the transmission path: signalling for the administration of the divided path, e.g. signalling of…
Modulated-carrier systems: systems using multi-frequency codes
About 12 years 8 months of term left · ends 28 Jun 2039 (estimated)
The present disclosure relates to a radio communication system and, in particular, to communication in which a radio terminal simultaneously uses multiple cells of different Radio Access Technologies (RATs) operated by different radio stations.
The 3rd Generation Partnership Project (3GPP) has started in 2016 the standardization for the fifth generation mobile communication system (5G), i.e., 3GPP Release 14, to make it a commercial reality in 2020 or later. 5G is expected to be realized by continuous enhancement/evolution of LTE and LTE-Advanced and an innovative enhancement/evolution by an introduction of a new 5G air interface (i.e., a new Radio Access Technology (RAT)). The new RAT supports, for example, frequency bands higher than the frequency bands (e.g., 6 GHz or lower) supported by LTE/LTE-Advanced and its continuous evolution. For example, the new RAT supports centimeter-wave bands (10 GHz or higher) and millimeter-wave bands (30 GHz or higher).
In this specification, the fifth generation mobile communication system is referred to as a 5G System or a Next Generation (NextGen) System (NG System). The new RAT for the 5G System is referred to as a New Radio (NR), a 5G RAT, or a NG RAT. A new Radio Access Network (RAN) for the 5G System is referred to as a 5G-RAN or a NextGen RAN (NG RAN). A new base station in the NG-RAN is referred to as a NR NodeB (NR NB) or a gNodeB (gNB). A new core network for the 5G System is referred to as a 5G Core Network (5G-CN) or a NextGen Core (NG Core). A radio terminal (i.e., User Equipment (UE)) capable of being connected to the 5G System is referred to as 5G UE or NextGen UE (NG UE), or simply referred to as UE. The official names of the RAT, UE, radio access network, core network, network entities (nodes), protocol layers and the like for the NG System will be determined in the future as standardization work progresses.
FIG. 1 is a diagram showing basic architecture of the 5G System according to the Background Art;
FIG. 2 is a diagram showing Architecture Option 3 for Dual Connectivity where E-UTRA (LTE eNB) and NR (gNB) are connected to EPC, according to the Background Art;
FIG. 3 is a diagram showing Architecture Option 3A for Dual Connectivity where E-UTRA (LTE eNB) and NR (gNB) are connected to EPC, according to the Background Art;
Specific embodiments will be described hereinafter in detail with reference to the drawings. The same or corresponding elements are denoted by the same symbols throughout the drawings, and duplicated explanations are omitted as necessary for the sake of clarity.
Each of the embodiments described below may be used individually, or two or more of the embodiments may be appropriately combined with one another. These embodiments include novel features different from each other. Accordingly, these embodiments contribute to attaining objects or solving problems different from one another and contribute to obtaining advantages different from one another.
The following descriptions on the embodiments mainly focus on DC architecture where E-UTRA and NR are connected to EPC. However, these embodiments may be applied to other radio communication systems supporting DC architecture where different RATs using different QoS frameworks are connected to a common core network.