Invented by Rui Wang, Mingzeng Dai, Hongzhuo ZHANG, Xudong Yang, Qinghai Zeng, Huawei Technologies Co Ltd
The Huawei Technologies Co Ltd invention works as followsExamples of communication apparatus and methods are described.” In one example, a network node will receive first configuration information via a second node. The first configuration includes a cell set configured to serve a terminal device and indicates the status of a second cell. “The first network node transmits first configuration information, first indication information, and at least one second cell to the terminal device. The first indication includes information about the status of at lease one secondary cell and the secondary cell is part of the serving cell set.
Background for Radio Access Network System, Communication Method, and Network Node
To increase the transmission bandwidth of long-term evolution advanced (LTE A) system, carrier aggregation technology (CA) is introduced. The main idea of carrier aggregation involves combining a number of component carriers (CC), into one carrier that has a larger bandwidth to support high-speed transmission of data. “In the prior art, the base station can configure carrier aggregation and determine the active/inactive status of a second cell. It may also notify the terminal device by signaling the active/inactive status of the secondary cells.
However the development of 5G communications networks changes network architecture. The concepts of a centralized (CU) unit and a divided unit (DU), which are separated from each other, are introduced. A radio access network (for instance, a base-station) is divided into two parts, the CU and the DU. In the CU as well as the DU, different protocol layers are used. In the CU for example, a layer called radio resource control is used. The DU uses a layer of media access control, a layer of physical (PHY), and other layers. In the 5G network another example is a technology that has been developed for a relay node. In the relay node for example, only a protocol layer architecture consisting of a layer 2 (for instance, a radio-link control (RLC), layer and a MAC, layer) as well as a Layer 1 (for instance, including the PHY layer) are deployed. A protocol stack above layer 2, like an RRC, is not deployed. The relay node must forward data or signals generated by the host base station to a terminal.
The original carrier aggregation method is not applicable to the new architecture. “How to configure carrier-aggregation in the new network is a problem that must be resolved urgently.
This application provides a method of communication, a node network, and a system for radio access networks, allowing a terminal to be configured with carrier aggregation in a new architecture.
A communication method is described in a first aspect. The method applies to a radio-access network system that includes a network node with a communication interface and another network node.
The first network node receives first configuration data from the second node. This first configuration data includes a set of serving cells configured for a device terminal, which includes at least one second cell. It also indicates a secondary cell’s status, whether it is in an active or an unactive state.
sending the first configuration information from the first node of the network to the terminal device
sending by the network node to the terminal device first indication data, which includes information about the status of at lease one secondary cell. The at least secondary cell is part of the serving cell set.
The at the least one second cell included in first indication information can be a subset from the serving cell group in the initial configuration information or it may be all the secondary cells of the serving-cell set. This is not limited to this application.
In one possible design, first indication information could include all secondary cells within the serving cell set and be used to indicate the status of each secondary. In another design, first indication information could include some secondary cell in the serving set and be used to show the status of those secondary cells. In another design, first indication information can include secondary cells within the serving cell set. The secondary cells may be determined by either the first or second network node, and they are then set to active or inactive states.
The first network node creates first indications at the second protocol level and sends them to the terminal to inform it of at least one secondary cell which is in an active/inactive status. This allows the terminal to update the status of at least one secondary cell upon receiving the information. In a new network, the terminal device is configured with carrier aggregation, which increases the transmission bandwidth.
In this embodiment, the first or second network node may determine the at least first secondary cell of the serving cell set.
Optionally, if the second network node determines that at least one primary secondary cell is in a state of “nodal status”, the method may include:
Receiving by the first node of the network, second indication data sent by the other node of the network, where the second information information includes at least one second secondary cell or includes at least the one second secondary cell and its status.
In other words after determining at least one primary cell, the network node transmits second indication to inform the first node about the at most one secondary cell. The first node then generates first indication based on second indication to notify terminal device the active/inactive status of at least one secondary cell.
Optionally, the method may include: “If the first node of the network determines the status at least one secondary cell, then the method includes:
determining by the first node of the network the status of at least one secondary cell of the serving cell set, based on the measurement result”, where the measurement results include at least one of:
A first measurement result from the terminal device of the first protocol layer;
a second result of measurement from a third protocol layer on the terminal device
a third measurement of an uplink that is obtained by measuring by the first node on the basis of a signal sent from the terminal device.
The first node of the network determines the state of at least one secondary cell in the serving cell set. This allows the first indication to be generated directly based on the result of the determining. It is a simple and convenient method.Click here to view the patent on Google Patents.