WO2021159862A1

WO2021159862A1 - Method for adding secondary cell group, and access network device and terminal device

Info

Publication number: WO2021159862A1
Application number: PCT/CN2020/138625
Authority: WO
Inventors: 王洲; 王键; 刘海义; 金乐
Original assignee: 华为技术有限公司
Priority date: 2020-02-14
Filing date: 2020-12-23
Publication date: 2021-08-19
Also published as: CN113271685A; CN113271685B

Abstract

Provided are a method for adding a secondary cell group (SCG), and an access network device and a terminal device. The method comprises: an access network device determining, from alternative secondary cell groups, a cell group to be added which supports dual connectivity (DC) with a cell in which a terminal device is currently located, wherein the cell group to be added comprises at least one cell, and in the cell group to be added, when it is determined that the cell group to be added is in dual connectivity with the cell in which the terminal device is currently located, a cell of the terminal device that supports carrier aggregation (CA) and/or supports multiple-input multiple-output (MIMO) capability is a target secondary cell group (SCG); and sending a first configuration message to the terminal device, wherein the first configuration message is used for indicating that the terminal device measures the target SCG in the cell in which the terminal device is currently located. Therefore, an access network device ensures that a terminal device supports dual connectivity capability when an SCG is added, noGAP measurement can be used, and backoff redundancy is not caused.

Description

Method for adding auxiliary cell group, access network equipment and terminal equipment

This application requires the priority of a Chinese patent application filed with the Chinese Patent Office on February 14, 2020, the application number is 202010093894.9, and the application name is "a method for adding a secondary cell group, access network equipment, and terminal equipment". The entire content is incorporated into this application by reference.

Technical field

This application relates to the field of communications, and more specifically, to a method for adding a secondary cell group, an access network device, and a terminal device.

Background technique

In the Long Term Evolution (LTE) system, the Dual Connectivity (DC) function is introduced. The DC includes two cell groups: a master cell group (Master Cell Group, MCG) and a secondary cell group (Secondary Cell Group, SCG), in the New Radio (NR, New Radio) system, MCG and SCG also exist. The access network equipment that manages the MCG can add SCGs to the terminal equipment according to the capabilities of the terminal equipment and the service of the terminal equipment. At the same time, the access network equipment that manages the MCG can also add a secondary component carrier (SCC) to the terminal equipment in the MCG, and the access network equipment can also configure the multiple-input multiple-output (Multiple-Input Multiple-Output) of the terminal equipment. , MIMO) capability.

The access network device can randomly add SCG or SCC to the terminal device and configure the MIMO capability of the terminal device. When the access network device adds SCG to the terminal device, the terminal device has already added SCC or configured with higher MIMO capability. Under the current carrier aggregation (CA) combination or higher MIMO capability, the terminal device may not Supports dual connections, and gap measurement is required. SCG signals may not be detected. If you want to continue adding SCG, you must fall back to CA or MIMO, which not only causes fallback redundancy, but also brings loss of transmission rate and performance, and reduces users Experience.

Summary of the invention

This application provides a method for adding a secondary cell group, access network equipment and terminal equipment. In this method, the equipment on the access network prioritizes the SCG addition before the SCC addition and the MIMO capability configuration, so as to ensure the smooth addition of the SCG for the terminal equipment and avoid the CA and MIMO capability rollback caused by the inability to add the SCG.

In a first aspect, a method for adding a secondary cell group SCG is provided, which includes: an access network device determines, from a candidate secondary cell group, a cell group to be added that supports dual-connection DC in the cell where the terminal device is currently located, and The cell group to be added includes at least one cell; in the cell group to be added, when the access network device determines that it is dual-connected to the cell where the terminal device is currently located, the terminal device supports carrier aggregation CA and/or supports multiple entry The cell with MIMO capability is the target secondary cell group SCG; the access network device sends a first configuration message to the terminal device, and the first configuration message is used to instruct the terminal device to measure the target SCG in the cell where it is currently located.

In this application, the access network equipment preferentially adds SCG to the terminal equipment, and the access network equipment determines from the candidate secondary cell group the cell group to be added that supports the dual-connection DC in the cell where the terminal equipment is currently located. In the added cell group, when it is determined that the terminal device is dual-connected to the cell where the terminal device is currently located, the cell that supports carrier aggregation CA and/or supports multiple input multiple output MIMO capabilities is the added SCG. Therefore, the access network equipment ensures that the terminal equipment has the ability to support dual connections when adding SCG, and can use noGAP measurement, and the access network equipment prioritizes SCG addition before adding SCC and MIMO capability configuration to ensure the smoothness of the terminal equipment Perform SCG addition to avoid the CA and MIMO capability rollback caused by the inability to add SCG.

With reference to the first aspect, in some implementations of the first aspect, in the cell group to be added, when it is determined that the terminal device is dual-connected to the cell where the terminal device is currently located, the terminal device supports carrier aggregation CA and/or supports The multiple-input multiple-output MIMO capable cell is the target SCG, including: determining the cell as the target SCG when the CA supported by the terminal device is greater than the first threshold and/or when the number of MIMO supported by the terminal device is greater than the second threshold.

With reference to the first aspect, in some implementations of the first aspect, the cell group to be added that supports dual connectivity DC is determined from the candidate secondary cell group and the cell in which the terminal device is currently located, the cell to be added Before the group includes at least one cell, the method further includes: when the cell where the terminal device is currently located has performed carrier aggregation CA and/or configured with MIMO, and the candidate secondary cell group does not support dual When connecting to a DC cell, send an unlimited resource control RCC message to the terminal device, where the RRC message is used to instruct the terminal device to back off the carrier aggregation and/or the MIMO quantity.

With reference to the first aspect, in some implementations of the first aspect, the cell group to be added that supports dual connectivity DC is determined from the candidate secondary cell group and the cell in which the terminal device is currently located, the cell to be added Before the group includes at least one cell, the method further includes: receiving a feedback message sent by the terminal device, the feedback message including the cell where the terminal device is currently located and the number of MIMO, wherein the terminal device configured with the number of MIMO currently There is a cell group supporting dual-connection DC in the cell and the candidate secondary cell group.

With reference to the first aspect, in some implementations of the first aspect, when the cell where the terminal device is currently located has already performed carrier aggregation CA and/or configured MIMO, and the candidate secondary cell group exists and the terminal device The current cell supports a dual-connected DC cell, and the method further includes: determining, from the candidate secondary cell group, the target SCG that supports dual-connected DC with the cell where the terminal device is currently located; and sending the first target SCG to the terminal device A configuration message.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: receiving a first report sent by the terminal device, where the first report includes a measurement result of the secondary cell SCG.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: sending a second configuration message to the terminal device, where the second configuration message is used to instruct the terminal device to pair the component in the cell where it is currently located. Carrier SCC is measured; a second report sent by the terminal device is received, and the second report includes the measurement result of the SCC.

With reference to the first aspect, in some implementations of the first aspect, the method further includes: sending a third configuration message to the terminal device, where the third configuration message is used to instruct the terminal device to configure MIMO in the current cell. Quantity; receiving a third report sent by the terminal device, the third report including the number of MIMO configured by the terminal device in the cell where it is currently located.

With reference to the first aspect, in some implementations of the first aspect, the DC includes a 4G connected ENDC with a 5G core network as the access network device or a 5G connected NEDC with a 4G core network as the access network device.

In a second aspect, a method for adding a secondary cell group is provided, which includes: when the cell where the terminal device is currently located has already performed carrier aggregation CA and/or configured MIMO quantity, the terminal device measures GAP according to the measurement GAP configured by the access network device. When the secondary cell SCG is not available, the terminal device backs off the component carrier SCC and/or reduces the number of MIMO, where the current cell and the alternate secondary cell of the terminal device after backing off the component carrier SCC and/or reducing the number of MIMO There is a cell group supporting dual connectivity DC; the terminal device sends a feedback message to the access network device, and the feedback message includes the current component carrier SCC quantity and MIMO quantity of the terminal equipment.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: receiving a first configuration message sent by the access network device, where the first configuration message is used to indicate that the terminal device is in the cell where it is currently located. Measure the target SCG; measure the target SCG according to the first configuration message; send a first report to the access network device, the first report including the measurement result of the target SCG.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: receiving a second configuration message sent by the access network device, where the second configuration message is used to indicate that the terminal device is in the current cell Measure the SCC in the next step; measure the SCC according to the second configuration message; send a second report to the access network device, the second report including the measurement result of the SCC.

With reference to the second aspect, in some implementations of the second aspect, the method further includes: after adding the SCC, receiving a third configuration message sent by the access network device, where the third configuration message is used to instruct the terminal device Configure the number of MIMO in the current cell; configure the number of MIMO according to the third configuration message; send a third report to the access network device, the third report includes the number of MIMO configured by the terminal device in the current cell .

In a third aspect, an access network device is provided, including: a processing unit, configured to determine, from a group of candidate secondary cells, a cell group to be added that supports dual connectivity DC with the cell where the terminal device is currently located. The cell group includes at least one cell; the processing unit is also used to determine that the terminal device supports carrier aggregation CA and/or supports multiple input multiple The cell with MIMO capability is the target secondary cell group SCG; the transceiver unit is used to send a first configuration message to the terminal device, the first configuration message is used to instruct the terminal device to measure the target SCG in the cell where it is currently located .

With reference to the third aspect, in some implementations of the third aspect, in the cell group to be added, when it is determined that the terminal device is dual-connected to the cell where the terminal device is currently located, the terminal device supports carrier aggregation CA and/or supports The multiple-input multiple-output MIMO-capable cell is the target secondary cell SCG, including: when the CA supported by the terminal device is greater than the first threshold and/or when the number of MIMO supported by the terminal device is greater than the second threshold, determining that the cell is the target secondary Cell SCG.

With reference to the third aspect, in some implementations of the third aspect, the transceiver unit is further configured to: when the cell where the terminal device is currently located has already performed carrier aggregation CA and/or configured with MIMO, and the candidate secondary cell group When there is no cell that supports dual-connection DC with the cell where the terminal device is currently located, an unlimited resource control RCC message is sent to the terminal device. The RRC message is used to instruct the terminal device to roll back the carrier aggregation and/or the MIMO quantity.

With reference to the third aspect, in some implementations of the third aspect, the transceiver unit is configured to receive a feedback message sent by the terminal device, and the feedback message includes the cell in which the terminal device is currently located and the number of MIMO, where the configuration A cell group supporting dual-connection DC exists in the cell where the terminal device is currently located and the candidate secondary cell group with the number of MIMO.

With reference to the third aspect, in some implementations of the third aspect, when the cell where the terminal device is currently located has already performed carrier aggregation CA and/or configured MIMO, and the candidate secondary cell group exists and the terminal device The cell where the current cell supports dual-connection DC, and the access network device further includes: determining from the candidate secondary cell group the target SCG that supports the dual-connection DC in the cell where the terminal device is currently located; Send the first configuration message.

With reference to the third aspect, in some implementations of the third aspect, the transceiver unit is configured to receive a first report sent by the terminal device, where the first report includes a measurement result of the secondary cell SCG.

With reference to the third aspect, in some implementations of the third aspect, the transceiving unit is configured to send a second measurement configuration message to the terminal device, and the second configuration message is used to instruct the terminal device to perform a connection in the cell where it is currently located. The component carrier SCC is measured; the transceiver unit is configured to receive a second report sent by the terminal device, and the second report includes the measurement result of the SCC.

With reference to the third aspect, in some implementations of the third aspect, the transceiver unit is used to send a third configuration message to the terminal device, and the third configuration message is used to instruct the terminal device to configure MIMO in the cell where it is currently located. Quantity; the transceiver unit is used to receive a third report sent by the terminal device, the third report including the number of MIMO configured by the terminal device in the cell where it is currently located.

With reference to the third aspect, in some implementations of the third aspect, the DC includes a 4G connection ENDC with a 5G core network as the access network equipment or a 5G connection NEDC with a 4G core network as the access network equipment.

In a fourth aspect, a terminal device is provided, including: a processing unit configured to perform carrier aggregation CA and/or configure MIMO quantity in the cell where the terminal device is currently located, and the terminal device is configured according to the access network device configuration When the secondary cell SCG cannot be detected by the measurement GAP, the terminal device backs off the component carrier SCC and/or reduces the number of MIMO. Among them, the current cell and backup of the terminal device after backing off the component carrier SCC and/or reducing the number of MIMO The selected secondary cell group includes a cell group supporting dual connectivity DC; the transceiver unit is used to send a feedback message to the access network device, the feedback message includes the current component carrier SCC quantity and MIMO quantity of the terminal equipment.

With reference to the fourth aspect, in some implementations of the fourth aspect, the transceiver unit is configured to receive a first configuration message sent by an access network device, and the first configuration message is used to indicate that the terminal device is in the cell where it is currently located. Measure the target SCG; the processing unit is used to measure the target SCG according to the first configuration message; the transceiver unit is used to send a first report to the access network device, the first report including the target SCG The result of the measurement.

With reference to the fourth aspect, in some implementations of the fourth aspect, the transceiver unit is configured to receive a second configuration message sent by the access network device, and the second configuration message is used to indicate that the terminal device is in the cell where the terminal device is currently located. Measure the SCC in the next step; the processing unit is configured to measure the SCC according to the second configuration message;

The transceiver unit is configured to send a second report to the access network device, where the second report includes the measurement result of the SCC.

With reference to the fourth aspect, in some implementations of the fourth aspect, the transceiver unit is configured to receive a third configuration message sent by the access network device after the SCC is added, and the third configuration message is used to instruct the terminal device Configure the number of MIMO in the current cell; the processing unit is used to configure the number of MIMO according to the third configuration message; the transceiver unit is used to send a third report to the access network device, the third report including the terminal device The number of MIMO configured in the current cell.

In a fifth aspect, an access network device is provided. The device includes at least one processor and a memory, the memory is used to store instructions, the processor is used to execute the instructions stored in the memory, and when the processor executes the memory to store The at least one processor is configured to execute the above first aspect or the method in any possible implementation manner of the first aspect.

In a sixth aspect, a terminal device is provided. The device includes at least one processor and a memory, the memory is used to store instructions, the processor is used to execute the instructions stored in the memory, and when the processor executes the instructions stored in the memory At this time, the at least one processor is configured to execute the foregoing second aspect or any possible implementation manner of the second aspect.

In a seventh aspect, an access network device is provided. The device includes at least one processor and an interface circuit, and the at least one processor is configured to execute the above first aspect or the method in any possible implementation manner of the first aspect.

In an eighth aspect, a terminal device is provided. The device includes at least one processor and an interface circuit, and the at least one processor is configured to execute the above second aspect or any possible implementation method of the second aspect.

In a ninth aspect, a computer program product is provided. The computer program product includes instructions. When the instructions run on a computer, the computer executes the method in the first aspect or any possible implementation of the first aspect, or executes The second aspect or any possible implementation of the second aspect.

In a tenth aspect, a computer-readable storage medium is provided. The computer-readable storage medium stores a computer program. When the computer program is executed, it is used to execute the first aspect or any possible implementation of the first aspect , Or execute the method in the second aspect or any possible implementation of the second aspect.

In an eleventh aspect, a chip is provided, including a processor and a communication interface, the processor is used to call and run instructions from the communication interface, and when the processor executes the instructions, the first aspect or the first aspect is implemented The method in any possible implementation manner, or the second aspect or the method in any possible implementation manner of the second aspect.

Optionally, the chip may further include a memory in which instructions are stored, and the processor is configured to execute instructions stored in the memory or instructions derived from other sources. When the instruction is executed, the processor is used to implement the method in any possible implementation manner of the first aspect or the first aspect, or the method in any possible implementation manner of the second aspect or the second aspect.

In a twelfth aspect, a communication system is provided. The communication system includes a device capable of implementing the methods and various possible design functions of the above-mentioned first aspect, and the foregoing method and various possibilities of implementing the above-mentioned second aspect. Designed functional device.

Description of the drawings

Figure 1a is a schematic diagram showing an application scenario of the present application;

Figure 1b is a schematic diagram showing an application scenario of the present application;

Figure 2a shows a schematic diagram of one of the application scenarios under the ENDC architecture;

Figure 2b shows a schematic diagram of one of the application scenarios under the NEDC architecture;

FIG. 3 is a schematic flowchart of a method for adding a secondary cell group according to the present application;

FIG. 4 is a schematic flowchart of a method for adding a secondary cell group according to the present application;

Figure 5 is a schematic diagram of measuring GAP configuration parameters;

FIG. 6 is a schematic flowchart of a method for adding a secondary cell group according to the present application;

Figure 7 is a schematic block diagram of adding SCG;

FIG. 8 is a schematic flowchart of another method for adding a secondary cell group according to the present application;

FIG. 9 shows a schematic block diagram of a communication device according to an embodiment of the present application;

FIG. 10 is a schematic structural diagram of a terminal device provided by this application;

FIG. 11 is a schematic structural diagram of an access network device provided by an embodiment of this application.

Detailed ways

The technical solution in this application will be described below in conjunction with the accompanying drawings.

The technical solutions of the embodiments of this application can be applied to various communication systems, such as: global system for mobile communications (GSM) system, code division multiple access (CDMA) system, broadband code division Multiple access (wideband code division multiple access, WCDMA) system, general packet radio service (GPRS), long term evolution (LTE) system, LTE frequency division duplex (FDD) system , LTE time division duplex (TDD), universal mobile telecommunication system (UMTS), worldwide interoperability for microwave access (WiMAX) communication system, fifth generation (5th generation, 5G) system or new radio (NR), as well as subsequent evolutionary communication systems, etc.

The terminal equipment in the embodiments of this application may also be referred to as: user equipment (UE), mobile station (MS), mobile terminal (MT), access terminal, user unit, user station, Mobile station, mobile station, remote station, remote terminal, mobile device, user terminal, terminal, wireless communication device, user agent or user device, etc.

The terminal device may be a device that provides voice/data connectivity to the user, for example, a handheld device with a wireless connection function, a vehicle-mounted device, and so on. At present, some examples of terminals are: mobile phones (mobile phones), tablet computers, notebook computers, handheld computers, mobile internet devices (MID), wearable devices, virtual reality (VR) devices, and augmented reality. (augmented reality, AR) equipment, wireless terminals in industrial control, wireless terminals in self-driving, wireless terminals in remote medical surgery, and smart grids Wireless terminals, wireless terminals in transportation safety, wireless terminals in smart cities, wireless terminals in smart homes, cellular phones, cordless phones, session initiation protocols , SIP) phone, wireless local loop (wireless local loop, WLL) station, personal digital assistant (personal digital assistant, PDA), handheld device with wireless communication function, computing device or other processing device connected to wireless modem, vehicle Devices, wearable devices, terminal devices in a 5G network, or terminal devices in a public land mobile network (PLMN) that will evolve in the future, etc., which are not limited in the embodiment of the present application.

As an example and not a limitation, in the embodiments of the present application, wearable devices can also be referred to as wearable smart devices. It is a general term for using wearable technology to intelligently design daily wear and develop wearable devices, such as glasses, Gloves, watches, clothing and shoes, etc. A wearable device is a portable device that is directly worn on the body or integrated into the user's clothes or accessories. Wearable devices are not only a kind of hardware device, but also realize powerful functions through software support, data interaction, and cloud interaction. In a broad sense, wearable smart devices include full-featured, large-sized, complete or partial functions that can be achieved without relying on smart phones, such as smart watches or smart glasses, and only focus on a certain type of application function, and need to cooperate with other devices such as smart phones. Use, such as all kinds of smart bracelets and smart jewelry for physical sign monitoring.

In addition, in the embodiments of the present application, the terminal device may also be a terminal device in the Internet of Things (IoT) system. IoT is an important part of the development of information technology in the future. Its main technical feature is to pass items through communication technology. Connect with the network to realize the intelligent network of human-machine interconnection and interconnection of things.

The various terminal devices described above, if they are located on the vehicle (for example, placed in the vehicle or installed in the vehicle), can be regarded as vehicle-mounted terminal equipment, for example, the vehicle-mounted terminal equipment is also called on-board unit (OBU). ).

In the embodiment of the present application, the terminal device may also include a relay. Or it can be understood that everything that can communicate with the base station can be regarded as a terminal device.

The access network device in the embodiment of the present application may be a device used to communicate with terminal devices. The access network device may also be called an access device or a wireless access network device, and may be an evolved base station in an LTE system ( evolved NodeB, eNB or eNodeB), it can also be a wireless controller in the cloud radio access network (CRAN) scenario, or the access device can be a relay station, an access point, a vehicle-mounted device, or a wearable device And the access equipment in the 5G network or the access network equipment in the future evolved PLMN network, etc., which can be the access point (AP) in the WLAN, or the new radio system (NR) system The gNB embodiment of this application is not limited.

In addition, in the embodiment of the present application, the access network device is a device in the RAN, or in other words, a RAN node that connects the terminal device to the wireless network. For example, as an example and not a limitation, as an access network device, it can include: gNB, transmission reception point (TRP), evolved Node B (eNB), radio network controller (radio network controller) , RNC), Node B (Node B, NB), base station controller (BSC), base transceiver station (base transceiver station, BTS), home base station (for example, home evolved NodeB, or home Node B, HNB) ), baseband unit (BBU), or wireless fidelity (Wifi) access point (AP), etc. In a network structure, the access network device may include a centralized unit (CU) node, or a distributed unit (DU) node, or a RAN device including a CU node and a DU node, or a control plane CU node (CU-CP node), user plane CU node (CU-UP node) and RAN equipment of DU node.

The access network equipment provides services for the cell, and the terminal equipment communicates with the access network equipment through the transmission resources (for example, frequency domain resources, or spectrum resources) used by the cell. The cell may be an access network equipment (for example, a base station). ) Corresponding cell. The cell can belong to a macro base station or a base station corresponding to a small cell. The small cell here can include: metro cell, micro cell, pico cell ), femto cells, etc. These small cells have the characteristics of small coverage and low transmit power, and are suitable for providing high-rate data transmission services.

Fig. 1 shows a schematic diagram of an application scenario 100 of the present application. In FIG. 1a, an access network device 110 and a terminal device 120 are included. Among them, the access network device 110, for example, works in an evolved UMTS terrestrial radio access (E-UTRA) system, or works in an NR system, or works in a next-generation communication system or other systems. In the communication system, the access network device 110 and the terminal device 120 can communicate through a Uu interface. In the embodiment of the present application, one access network device can serve multiple terminal devices. FIG. 1a only takes one terminal device as an example.

The access network device in FIG. 1a is, for example, a base station. Among them, the access network equipment corresponds to different equipment in different systems. For example, in a 4G system, it can correspond to an eNB, and in a 5G system, it corresponds to an access network equipment in 5G, such as gNB. The technical solutions provided by the embodiments of the present application can also be applied to future mobile communication systems. Therefore, the access network device in FIG. 1a can also correspond to the access network device in the future mobile communication system. Figure 1a takes the access network device as a base station as an example. In fact, referring to the previous introduction, the access network device may also be a device such as an RSU.

It should be understood that the communication system shown in FIG. 1a may also include more network nodes, such as other terminal equipment or access network equipment, and the access network equipment or terminal equipment included in the communication system shown in FIG. 1a may be the aforementioned Various forms of access network equipment or terminal equipment. The embodiments of the present application are not shown one by one in the figure.

In the process of moving, the terminal equipment can transfer from the coverage of one cell to the coverage of another cell. The terminal equipment will perform cell reselection or cell handover to obtain continuous service of the wireless network. As shown in Figure 1b. According to the difference of the RRC connection state between the terminal device and the access network device, the terminal device can be in: RRC connected state (connected state), RRC idle state (idle state) and inactive state (inactive state).

Among them, RRC connected state (or, can also be referred to as connected state for short. In this article, "connected state" and "RRC connected state" are the same concept, and the two terms can be interchanged): the terminal device establishes an RRC connection with the network , Data transmission can be carried out.

RRC idle state (or, can also be referred to as idle state for short. In this article, "idle state" and "RRC idle state" are the same concept, and the two terms can be interchanged): the terminal device does not establish an RRC connection with the network, and the base station The context of the terminal device is not stored. If the terminal device needs to enter the RRC connected state from the idle state, it needs to initiate an RRC connection establishment process.

In the inactive state, the terminal device enters the RRC connected state before, and then the base station releases the RRC connection, but the base station saves the context of the terminal device. If the terminal device needs to enter the RRC connected state again from the inactive state, it needs to initiate the RRC connection recovery process (or called the RRC connection re-establishment process). Compared with the RRC establishment process, the RRC recovery process has shorter time delay and lower signaling overhead. However, the base station needs to save the context of the terminal device, which will occupy the storage overhead of the base station.

The cell reselection (Reselection) is mainly realized by the terminal device itself. The terminal device uses Radio Resource Management (RRM) measurement to determine whether it is within the coverage of the cell, and receives reference signals from multiple cell base stations, and calculates The power of the signal, and compare and select. After satisfying certain trigger conditions and access criteria, the terminal device completes cell reselection. In the RRC_IDLE state and RRC_INACTIVE state, there is no RRC link between the terminal device and the access network device. When the signal quality of the serving cell where the terminal resides is lower than a certain threshold, the terminal device measures the information of the neighboring cells of the serving cell and the neighboring cell according to the same frequency, different frequency and/or different system neighboring cell information configured by the access network equipment in the system message. Signal quality, to determine whether the signal quality meets the reselection conditions. If it is satisfied, reselect the neighboring cell and stay in the neighboring cell.

Cell handover (Handover) requires the access network equipment to use a series of RRM measurement configurations and configure the terminal equipment according to the feedback of the terminal equipment. If the RRM measurement result meets certain conditions, the measurement report will be triggered. After receiving the measurement report of the terminal device, the network device can send a handover command to the terminal device to instruct the terminal device to switch from one cell to another. In the RRC_CONNECTED state, there is an RRC connection between the terminal equipment and the access network equipment, and the access network equipment configures the terminal to perform intra-frequency, inter-frequency, and/or different system neighbor cell measurements through RRC signaling. The terminal equipment reports the measurement results of the serving cell and neighboring cells to the access network equipment through RRC signaling, and the access network equipment then switches the terminal to a cell with better signal quality according to the measurement results.

This application relates to dual connectivity (Dual Connectivity, DC) technology, and DC is briefly introduced below. Dual connectivity includes two cell groups: the primary cell group MCG and the secondary cell group SCG. The MCG includes one PCell or additionally includes one or more SCells, and the SCG includes one primary secondary cell (Primary Secondary Cell, PSCell) or additionally includes one or more secondary cells (Secondary Cell, Scell). The base station that manages the MCG is called a master base station (Master eNB, MeNB), and the base station that manages the SCG is called a secondary base station (Secondary eNB, SeNB). For a UE in dual connectivity mode, the control plane bearer only has a connection between the MeNB and the core network element. Each eNodeB can independently manage the radio resources in the UE and its own cell. The resource coordination between the MeNB and the SeNB is transmitted via signaling messages on the X2 interface.

In dual connectivity, the data plane radio bearer can be independently served by the MeNB or SeNB, or simultaneously served by the MeNB and SeNB. When served by MeNB only, it is called MCG bearer (MCG: serving cell group controlled by MeNB), when served only by SeNB, it is called SCG bearer, and when served by MeNB and SeNB at the same time, it is called separate bearer.

In the independent bearer mode, the same data bearer (uplink and downlink) is allocated to the MeNB or SeNB under the control of the core network. After the data stream is divided in the core network, it is independently transmitted via the MeNB and the seNB, and the SeNB plays a role of load sharing. In the separated bearer mode, all downlink data streams are first transmitted to the MeNB, and then divided by the MeNB according to a certain algorithm and ratio, and part of the data is sent to the SeNB through the X2 interface, and finally the data is sent to the UE at the same time on the MeNB and the SeNB.

The deployment of 5G networks is a gradual process. In the early days, 5G hotspots can be deployed on the basis of the existing LTE network, that is, the 5G wireless system can be connected to the existing LTE core network through the non-stand alone (NSA) network architecture to achieve the rapid speed of the 5G system Deployment and program verification. After the completion of the 5G core network, the 5G system can realize independent networking. In this case, although 5G can provide higher-speed data services and higher service quality, in some areas with insufficient coverage, the LTE system can still be used. Provide better coverage.

The NSA network includes E-UTRA NR Dual Connectivity (ENDC) architecture, NR E-UTRA Dual Connectivity (NR E-UTRA Dual Connectivity, NEDC) architecture, and E-UTRA NR under the 5g core network The dual connectivity (Next Generation E-UTRA NR Dual Connectivity, NGENDC) architecture. Among them, the ENDC architecture uses the eNB as the main base station, and all control plane signaling is forwarded via the eNB. LTE eNB and NR gNB provide users with high data rate services in the form of dual connectivity to increase the throughput rate of the system capacity. Figure 2a is a schematic diagram of one of the application scenarios under the ENDC architecture. In this scenario, all control plane signaling is forwarded via the eNB, and the eNB offloads the data to the gNB.

The NEDC architecture is based on gNB as the main base station, and LTE eNB and NR gNB use dual connectivity to provide users with high data rate services. Figure 2b is a schematic diagram of one of the application scenarios under the NEDC architecture. In this scenario, all control plane signaling is forwarded through the gNB, and the gNB offloads the data to the eNB.

All control plane signaling in the NGENDC architecture is forwarded by the eNB, and the LTE eNB and NR gNB provide users with high data rate services in the form of dual connectivity.

A variety of possible LTE/5G dual connectivity modes are defined in 3GPP Release: 3/3a/3x, 4/4a and 7/7a/7x. Here is only an exemplary description of the dual connection mode, and does not impose any limitation on the structure of the dual connection, and there may be other modes of the dual connection.

In the prior art, when a terminal device is in a connected state or a deactivated state, SCG can be added according to the configuration of the access network device, or a component carrier can be added and MIMO capability can be optimized. The access network equipment randomly initiates adding SCG or SCC to the terminal equipment and optimizing the MIMO capability. When the access network device adds SCG to the terminal device, and the terminal device does not support dual connectivity under the current Carrier Aggregation (CA) combination or MIMO capability, if you need to continue adding SCG, you must roll back CA or MIMO, which not only causes Redundancy is rolled back, and the loss of transmission rate and performance reduces the user experience.

In view of this, this application proposes a method for adding a secondary cell group. In this method, the access network device determines from the candidate secondary cell group that the cell in which the terminal device is currently located supports dual connectivity DC to be added. Cell group, the cell group to be added includes at least one cell; in the cell group to be added, when it is determined that the terminal device is dual-connected to the cell where the terminal device is currently located, the terminal device supports carrier aggregation CA and/or supports multiple input multiple output MIMO capabilities The cell is the target secondary cell SCG. Therefore, the access network equipment ensures that the terminal equipment supports dual connectivity when adding SCG, can use noGAP measurement, and will not cause fallback redundancy.

The following describes in detail a method for adding a secondary cell group provided by the present application with reference to FIG. 3. FIG. 3 is a schematic flowchart of a method 200 for adding a secondary cell group according to an embodiment of the present application. The method 200 may be applied to FIG. In the scenario shown in 1, of course, it can also be applied in other communication scenarios, and the embodiment of the present application does not limit it here.

It should also be understood that, in the embodiment of the present application, the terminal device and the access network device are taken as an example of the execution subject of the execution method to describe the method. As an example and not a limitation, the execution body of the execution method may also be a chip, a chip system, or a processor applied to a terminal device and an access network device.

As shown in FIG. 3, the method 200 shown in FIG. 3 may include S201 to S210. The steps in the method 200 will be described in detail below in conjunction with FIG. 3.

S201: The access network device initially selects an added SCG cell.

S202: The access network device determines whether the SCG cell added by the preliminary selection and the cell in which the current terminal device works meet the DC combination.

S203: If the added SCG cell of the primary selection and the cell in which the current terminal device works do not meet the DC combination, adjustment is made, and the added SCG cell is reselected.

S204: If the SCG cell to be added in the primary selection and the cell in which the current terminal device works meet the DC combination, the access network device selects to add the component carrier SCC under the current combination.

S205: The access network device determines whether the cell in which the added SCC and the current terminal device work meets the CA combination under the current combination.

S206: If the added SCC and the cell in which the current terminal device works meet the CA combination, under the current combination, the access network device improves the MIMO capability.

S207: If the added SCC and the cell in which the current terminal device works do not satisfy the CA combination, the access network device adjusts and selects the added SCC again.

S208: The access network device determines whether the improved MIMO capability is satisfied under the current combination.

S209: If the improved MIMO capability is satisfied under the current combination, the access network device adds the initially selected SCG.

S210: If the improved MIMO capability is not satisfied under the current combination, the access network device adjusts and reconfigures the MIMO capability.

Generally speaking, terminal equipment with low MIMO capability and non-CA support DC combinations are the most. In this application, the access network equipment preferentially adds SCG to the terminal equipment, and the access network equipment selects the alternative secondary cell group. Determine the cell group to be added that supports dual-connection DC with the cell where the terminal device is currently located. In the cell group to be added, when it is determined that the terminal device is dual-connected to the cell where the terminal device is currently located, the terminal device supports carrier aggregation CA and/or supports The cell with multiple input multiple output MIMO capability is an added SCG. Therefore, the access network equipment ensures that the terminal equipment has the ability to support dual connections when adding SCG, and can use noGAP measurement, and the access network equipment prioritizes SCG addition before adding SCC and MIMO capability configuration to ensure the smoothness of the terminal equipment Perform SCG addition to avoid the CA and MIMO capability rollback caused by the inability to add SCG.

In step S201, the access network device preliminarily selects the added SCG cell from the candidate secondary cell group, and may select one SCG cell or multiple SCG cells. For example, the terminal device is currently accessing cell 1, and the access network device can learn that the candidate secondary cells are cell 2, cell 3, and cell 4. The access network device can initially select cell 2 as the added SCG cell, and then proceed to the steps In the judgment of S202, the access network device may also initially select cell 2, and cell 3 and cell 4 are added SCG cells, and then perform the judgment of step S202 for cell 2, cell 3, and cell 4.

In step S204, if the initially selected added SCG cell meets the DC combination of the cell in which the current terminal device works, then under the connection combination of the initially selected added SCG cell and the current terminal device working cell, the access network device selects to add a component Carrier SCC. For example, in the above step S202, the access network equipment has been judged that cell 2, cell 3, and cell 4 can all be dual-connected to cell 1. Then, in step S204, the access network equipment can be dual-connected to cell 1 and cell 2. When connected, add component carrier SCC to the terminal equipment; when the access network equipment is dual-connected to cell 1 and cell 3, add the component carrier SCC to the terminal equipment; The terminal equipment adds the component carrier SCC.

It should be understood that in step S204, in the initial selection of the connection combination of the added SCG cell and the cell in which the current terminal device works, the access network device may choose to add multiple component carrier SCCs. For example, the access network device may be in cell 1. When dual-connected to cell 2, add component carriers SCC1, SCC2, and SCC3 to the terminal equipment.

In step S205, the access network device determines whether the added SCC and the cell in which the current terminal device works under the current combination satisfy the CA combination. For example, the access network equipment judges whether the component carrier SCC added by the terminal equipment meets the CA combination when the cell 1 and cell 2 are dual-connected; the access network equipment judges whether the cell 1 and cell 3 are dual-connected , Whether the component carrier SCC added to the terminal equipment and the cell in which the current terminal equipment works meets the CA combination; the access network equipment judges that the component carrier SCC added to the terminal equipment works with the current terminal equipment when the cell 1 and cell 4 are dual-connected Whether the cell satisfies the CA combination.

It should be understood that if in step S204, if the access network device chooses to add multiple component carrier SCCs to the current terminal device under the connection combination of the SCG cell added and the cell in which the current terminal device works, then in step S205 , Respectively determine whether the current terminal equipment adds multiple component carrier SCCs and the cell in which the current terminal equipment works satisfies the CA combination.

In step S206, the access network device determines to improve the MIMO capability under the current combination. Before step S206, the access network device has selected the added SCG cell and the cell in which the current terminal device works to satisfy the DC combination, and when adding the SCG cell, the cell in which the current terminal device works can also add the component carrier SCC. At this time, The access network equipment can improve the MIMO capability of the terminal equipment. For example, the access network equipment can add the component carrier SCC1 to the terminal equipment when the cell 1 and cell 2 are dually connected. SCC1 can work with the cell CA of the current terminal equipment. In this case, the access network equipment can improve the MIMO capability , Such as setting the MIMO capability to 4.

In step S208, the access network device determines that the added SCG cell and the cell in which the current terminal device works meets the DC combination, and when adding the SCG cell, the current terminal device also adds the component carrier SCC to the situation where the component carrier SCC is added. Does the MIMO capability satisfy this combination? For example, the access network device can add the component carrier SCC1 to the terminal device when the cell 1 and cell 2 are dually connected. SCC1 can work with the cell CA of the current terminal device. The access network device sets the MIMO capability to 4, and the terminal device When the MIMO capability of is 4, whether the current access network equipment can connect in cell 1 and cell 2, and add the component carrier SCC1 to the terminal equipment.

In step S209, the access network device determines that the current combination satisfies the improved MIMO capability, and the access network device can add the initially selected SCG cell to the terminal device at this time. The access network device may send a measurement configuration message to the terminal device, and the measurement configuration message is used to instruct the terminal device to measure the initially selected SCG cell in the cell where it is currently located.

It should be understood that in step S201, the access network device preliminarily selects the added SCG cell from the candidate secondary cell group, and may select one SCG cell or multiple SCG cells. When selecting an SCG cell, when the access network device performs the judgments in step S202, step S205, and step S208, if the current SCG cell does not meet any of the above judgment conditions, the access network device needs to reselect an SCG cell. Make judgments. When multiple SCG cells are selected, when the access network device performs the judgment of step S202, step S205, and step S209, if there are SCG cells that do not meet any of the judgment conditions among the multiple SCG cells, the SCG that does not meet the judgment conditions can be discarded. Cell, reserve the SCG cell that meets the judgment condition. For example, when the terminal device currently accesses cell 1, the access network device can learn that the candidate secondary cells are cell 2, cell 3, cell 4, and cell 5. The access network device initially selects cell 2, cell 3, cell 4, and cell 5 Perform subsequent judgments for the added SCG cell. In step S202, the access network equipment determines that cell 1 and cell 2 can be dual-connected, cell 1 and cell 3 can be dual-connected, cell 1 and cell 4 can be dual-connected, and cell 1 and cell 5 cannot be dual-connected . Therefore, the access network equipment discards cell 5, and judges when cell 2, cell 3, and cell 4 are connected to cell 1, respectively; in step S205, when cell 1 and cell 2 are dual-connected, cell 1 adds SCC1 and SCC2, where SCC1 and SCC2 can perform CA with the cell where the current terminal equipment works. When cell 1 and cell 3 are dual-connected, cell 1 adds SCC1, and SCC1 and the cell where the current terminal equipment works can perform CA. When cell 4 is dual-connected, cell 1 adds SCC1, and the cell where SCC1 works with the current terminal device can perform CA. In this case, the access network device discards cell 4, and cell 2 and cell 3 can be selected first Cell 2, because when cell 2 is connected to cell 1, more CA combinations are supported. In step S208, when cell 1 and cell 2 are dual-connected, the access network device increases the MIMO capability to 4. When cell 1 and cell 2 are dual-connected, and cell 1 adds SCC1 and SCC2, the current terminal device can support MIMO The capability is 4. At this time, the access network device can add cell 1 to the terminal device as an SCG.

In step S201, the access network device preliminarily selects the added SCG cells from the candidate secondary cell group to be multiple SCG cells, and the access network device may preset the threshold when making the judgment in step S202, step S205, and step S208. In step S205, the access network device determines whether the cell in which the added SCC and the current terminal device work under the current combination meets that the number of CA combinations is greater than the first threshold. If the first threshold is 2, when the terminal device is currently accessing cell 1, the access network device judges that cell 1 and cell 2 can be dual-connected, cell 1 and cell 3 can be dual-connected, and cell 1 and cell 4 can be dual-connected When cell 1 and cell 2 are dual-connected, cell 1 adds SCC1 and SCC2. Among them, SCC1 and SCC2 can perform CA with the cell where the current terminal equipment works. The number of CA is 3. When cell 1 and cell 3 are dual-connected, SCC1 is added to cell 1, and the cell where SCC1 works with the current terminal equipment can perform CA. The number of CAs is 2. When cell 1 and cell 4 are dually connected, SCC1, SCC2 and SCC3 are added to cell 1, and the number of CAs is 4, cell 1. The number of CAs for dual connection with cell 2 is 3, and the number of CAs for dual connection with cell 1 and cell 4 is 4, which are both greater than the first threshold 2. Cell 1 and cell 2 are selected as SCG cells to be added, and the judgment is continued.

In step S208, the access network device determines whether the number of MIMO supported by the terminal device under the current combination is greater than or equal to a second threshold. For example, the second threshold is 4, when the terminal device is currently connected to cell 1, the number of CA is 3 when cell 1 and cell 2 are dual-connected, and the number of MIMO supported by the terminal device is 2; when cell 1 and cell 4 are dual-connected, CA The number is 4, the number of MIMO that the terminal device can support is 4. When cell 1 and cell 4 are dual-connected, the number of MIMO that the terminal device can support is 4, which meets the preset condition of the second threshold, so select cell 4 as the target SCG To add.

It should be understood that in step S208, multiple cells may be dual-connected to cell 1, and multiple component carrier CAs may be connected to cell 1. At this time, the access network device can select a cell with high MIMO capability as the addition SCG. For example, when cell 1 and cell 2 are dual-connected, cell 1 can be connected to SCC1 and SCC2CA, at this time, the MIMO capability supported by the terminal device is 4; when cell 1 and cell 3 are dual-connected, cell 1 can be connected to SCC2 and SCC2CA, At this time, the MIMO capability supported by the terminal device is 2, and the access network device selects a combination with high MIMO capability as the SCG to be added, that is, the access network device selects cell 2 as the SCG to be added.

It should also be understood that when the access network equipment may be dual-connected to multiple cells and cell 1, and the cell 1 can be connected to multiple component carrier CAs, and the terminal device can be connected to multiple component carrier CAs in cell 1. If the number of supported MIMO is the same, the access network device can arbitrarily determine a cell as the target SCG to add. For example, when the terminal device is currently connected to cell 1, the number of CAs is 4 when cell 1 and cell 2 are dual-connected, and the number of MIMO that the terminal device can support is 4; when cell 1 and cell 4 are dual-connected, the number of CA is 4, and the terminal The number of MIMO supported by the device is 4, and the access network device can select cell 2 or cell 4 as the target SCG to add.

The above method mainly describes how the access network device selects the target SCG to be added. After the access network device determines the target SCG, the access network device sends a first configuration message to the terminal device. The first configuration message is used to instruct the terminal device to The primary selected SCG cell is measured under the cell where it is located, and the first configuration message may be sent through RRC signaling. The specific flow chart is shown in FIG. 4. FIG. 4 is a schematic flow chart of a method 300 for adding a secondary cell group according to the present application. The method 300 can be applied in the scenario shown in FIG. In the communication scenario, the embodiment of the present application does not limit it here.

As shown in FIG. 4, the method 300 shown in FIG. 4 may include S310 to S330. Hereinafter, each step in the method 300 will be described in detail with reference to FIG. 4.

S310: The access network device determines, from the candidate secondary cell group, a cell group to be added that supports dual connectivity DC with the cell where the terminal device is currently located, and the cell group to be added includes at least one cell;

S320: In the cell group to be added, when the access network device determines that it is dual-connected to the cell where the terminal device is currently located, the terminal device supports carrier aggregation CA and/or supports multiple input multiple output MIMO capabilities as the target secondary cell. Group SCG;

S330: The access network device sends a first configuration message to the terminal device, where the first configuration message is used to instruct the terminal device to measure the target SCG in the cell where it is currently located.

After receiving the first configuration message, the terminal device can use noGAP measurement to measure the parameter of the SCG to be added, and the parameter can be the signal power of the SCG to be added.

The noGAP measurement mentioned in this application is a way for terminal equipment to measure inter-frequency or inter-system cells. In communication scenarios such as cell reselection, cell handover, adding secondary cell groups, and adding component carriers, the terminal equipment needs to measure cells of different frequencies or systems. Common measurement methods include measurement that requires GAP or measurement that does not require GAP.

For RRC idle or inactive inter-frequency/inter-system measurement, since the terminal device is idle most of the time and does not need to send and receive data on the serving cell, these idle times can be used for inter-frequency/inter-system measurement, so do not configure Measure the gap GAP.

For the inter-frequency/inter-system measurement in the RRC connection state, according to the capabilities of the terminal device, the measurement that requires GAP or the measurement that does not require GAP can be used. If the terminal device has multiple sets of radio frequency channels and can support receiving signals on different frequencies/different system neighboring cells at the same time when transmitting and receiving signals on the serving cell, the terminal device supports the measurement method that does not require GAP; otherwise, it needs to adopt the measurement that requires GAP In the GAP, stop the signal transmission and reception on the serving cell, adjust the radio frequency path to the different frequency/different system frequency point, and receive the different frequency/different system adjacent cell signal. GAP measurement will affect the communication between the terminal equipment and the current serving cell.

The measurement GAP is configured by the access network equipment. In the GAP, the access network equipment does not schedule the downlink reception and uplink transmission of the terminal on the serving cell. Therefore, the uplink and downlink error codes will not be caused in the GAP. The configuration of the measurement GAP is shown in Figure 5. Figure 5 shows the configuration parameters of the measurement GAP. The measurement GAP is mainly composed of three parameters: MGRP (Measurement Gap Repetition Period, measurement time slot repetition period) configures the measurement GAP period; MGL (Measurement Gap) Length, measurement time slot length) configures the length of the measurement GAP; gapOffset configures the starting position of the measurement gap. According to these three parameters, it can be determined that the measurement GAP starts on SFN (System Frame Number) and subframe (subframe) that meet the following conditions:

SFN mod T=FLOOR(gapOffset/10);

subframe=gapOffset mod 10;

T=MGRP/10;

The above SFN and subframe are the SFN and subframe of PCell (Primary Cell). The maximum MGL is 6ms.

GAP configuration includes period, offset and length. Once the GAP is configured through the RRC message, it will periodically appear at a fixed offset position until it is configured through the RRC message again.

The NR protocol requires that for LTE and NR that belong to the same FR (frequency range) band, when LTE measures NR, EN-DC measures LTE inter-frequency, EN-DC measures NR inter-frequency, independent networking (Standalone, SA) measures NR difference It is necessary to configure measurement GAP to assist in measurement in scenarios such as measuring frequency, SA measurement in LTE heterogeneous systems.

Under the same FR, all frequency points of NR measurement GAP are uniformly configured. For the case of not supporting FR1 and FR2 to configure GAP independently, UE-level unified GAP needs to be configured during measurement; for the case of supporting FR1 and FR2 independent configuration of GAP, all frequency bands of FR1 or all frequency bands of FR2 are independently configured with a measurement GAP, the same The GAP configuration on the FR is the same.

The specific definitions of the parameters in the NR GAP configuration message are as follows:

gapFR1: Indicates the measurement GAP configuration only applicable to FR1. In EN-DC, gapFR1 cannot be set by NR RRC (only RRC of LTE can configure FR1 gap). gapFR1 cannot be configured with gapUE. For specific configuration, see TS 38.133 Table 9.1.2-2.

gapFR2: Indicates the measurement GAP configuration only applicable to FR2. gapFR2 cannot be configured with gapUE. For specific configuration, see TS 38.133 Table 9.1.2-1 and Table 9.1.2-2.

gapUE: indicates the measurement GAP configuration applicable to all frequencies (FR1 and FR2). In the case of EN-DC, gapUE cannot be set by NR RRC (that is, only LTE RRC can configure GAP for each UE). If gapUE is configured, neither gapFR 1 nor gapFR2 can be configured. For specific configuration, see TS 38.133 Table 9.1.2-2.

gapOffset: gapOffset is the GAP offset indicated in the mgrp field. The value range should be from 0 to mgrp-1.

Mgl: measurement gap length, the unit is ms. For specific configuration, see TS 38.133 Table 9.1.2-1 and Table 9.1.2-2.

Mgrp: measurement gap repetition period, the unit is ms. For specific configuration, see TS 38.133 Table 9.1.2-1&9.1.2-2. Mgta: measurement gap timing advance, the unit is ms. If the UE is configured with this parameter, the UE will start measurement mgta ms ahead of the GAP subframe. Refer to section 9.1.2 of TS38.133 for the use of this parameter.

The measurement of the NR neighboring cell can be based on the synchronization signal block (Synchronization Signal Block, SSB), but due to the particularity of the SSB signal design, if the measurement method that requires gap (inter-frequency/inter-system measurement in the RRC_CONNECTED state) is used, the base station needs to be configured Accurate gap position to include the SSB of the neighboring cell.

For accurate gap position, the time domain position of the gap needs to be measured with reference to the PCell timing, while the time domain position of the neighboring cell SSB is sent at the timing of the neighboring cell. In order to configure the correct gap position, the base station needs to know the difference between the PCell and the NR neighboring cell. Therefore, it is determined that the SFN and subframe number of the SSB of the adjacent cell of the NR correspond to the SFN and subframe number of the PCell. This can be achieved by measuring the terminal system frame number and frame timing difference (SFN and frame timing difference, SFTD) to obtain the timing offset of the two cells and reporting it to the base station. SFTD measurement results include SFN deviation and frame boundary timing deviation. The current protocol supports EUTRA-NR Dual Connectivity (EUTRA-NR Dual Connectivity, EN-DC) between LTE PCell and NR PSCell, and NR-EUTRA Dual Connectivity (NR-EUTRA Dual Connectivity, NE-DC) under NR PCell and LTE SFTD measurement between PSCells, between NR PCell and NR PSCell under NR dual connectivity (NR-Dual Connectivity, NR-DC), and between LTE PCell and NR neighboring cells under non-dual connectivity DC.

During SFTD measurement, the terminal needs to receive a signal from another cell under test other than the PCell to obtain the timing information of the cell. In DC, because the terminal can support simultaneous work on PCell and PSCell, know the timing information of PCell and PSCell at any time, so there will be no difficulty in SFTD measurement; SFTD measurement between LTE PCell and NR neighbor cell under non-DC, if The radio frequency channel of the terminal does not support receiving and sending signals on the PCell while receiving signals on the NR neighboring cell. There are certain difficulties in SFTD measurement. The current protocol supports the following two methods: SFTD measurement that requires gap and connected discontinuous reception (CONNECTED Discontinuous Reception, CDRX) SFTD measurement in the inactive period.

In the measurement GAP, the terminal device first detects the synchronization signals of other cells, uses the synchronization signals of other cells to synchronize with other cells, and then performs related measurements on the reference signals sent by other cells to complete the measurement of other cells. Interrupting the receiving and sending of data in the original service area within the measurement GAP will have a greater impact on throughput.

At present, LTE terminals can support CA combinations in many different frequency bands, have multiple receiving channels, and have the ability to directly measure different frequencies/systems without the need to configure GAP. In this way, the data transmission in the original service area is not interrupted, and the service in the original service area of the terminal is not affected.

However, LTE supports many frequency bands and CA combinations, and there are many different frequency/different system frequency bands that need to be measured. Based on cost considerations, terminals usually only support a limited number of frequency band combinations, and cannot support all frequency band combinations without GAP measurement. Frequency/different system.

The current agreement stipulates that LTE can report which measurement frequency band combinations need to measure GAP through interFreqNeedForGaps/interRAT-NeedForGaps cells in a capability message, and which measurement frequency band combinations do not need to measure GAP.

interFreqNeedForGaps:

Indicates needed for measurement gaps when operating on the E-UTRA band given by the entry in bandListEUTRA or on the E-UTRA band combination given by the entry in bandCombinationListEUTRA and measuring in the E-UTRA and measuring in the E-UTRA and inter

Operate on the E-UTRA frequency band given by the entry in bandListEUTRA, or on the E-UTRA frequency band combination given by the entry in bandCombinationList E-UTRA, and on the E-UTRA frequency band given by the entry in interFreqBandList Need to measure the gap when measuring.

interRAT-NeedForGaps:

Indicates needed for DL measurement gaps when operating on the E-UTRA band given by the entry in bandListEUTRA or on the E-UTRA band combination given by the entry-based RAT and inter-RAT-measuring BandList.

Operate on the E-UTRA band given by the entry in bandListEUTRA, or on the E-UTRA combined band given by the entry in bandCombinationList E-UTRA, and on the inter-RAT band given by the entry in interRAT-BandList When measuring on the frequency band, a downlink measurement gap is required.

The service area band is indicated by bandListEUTRA (supported single band) or bandCombinationListEUTRA (supported CA); the target measurement inter-frequency band is indicated by interFreqBandList, and the target measurement inter-system band is indicated by interRAT-BandList. Use 1 bit False or True to indicate the service area frequency band/CA combination to measure whether GAP needs to be measured in the inter-frequency band or the inter-frequency band. True means that it is required, and False means that it is not required.

As shown in Table 1 below, the access network equipment determines whether to configure GAP during measurement according to the capabilities of the terminal equipment.

Table 1 Whether the GAP measurement capability reported by the terminal equipment is required

In the prior art, the message of the measurement capability is reported, and the message has a large number of bits and a large amount of information, and the reporting is difficult and easy to fail. Assuming that N is the number of frequency bands supported by the terminal, M is the number of different system frequency bands supported, and L is the number of supported LTE CA combinations, the number of information bits that need to be reported is (N+L)*(N+M). At present, the UE can typically support 500 CA combinations, 20 inter-frequency band measurements, and 10 inter-system measurements. The amount of messages that need to be reported is 15,600 bits. The amount of messages is large, which is prone to errors and difficult to report.

Currently, the report does not support 5G NR measurement noGAP capability reporting. 5G NR supports more frequency bands and supports more frequency band combinations such as EN-DC/NE-DC and NR CA. Need to measure NR different frequency, LTE different system, also need to measure 23G different system under NSA, need to measure more different frequency, different system. 5G NR allocation measurement GAP measurement of different frequencies and different systems will also have a greater impact on the throughput of LTE&NR under NSA/SA. NR also needs to be reported as whether each measurement frequency band combination needs to measure GAP for measurement.

Compared with LTE, there are more frequency band combinations supported by NR and the frequency band combinations that need to be measured. It is more difficult for UEs to support all frequency band combinations without GAP measurement inter-frequency and inter-frequency systems. It needs to be similar to LTE sub-band reporting whether the ability to measure GAP needs to be configured. Compared with LTE, NR adds more frequency bands, CA, EN-DC, NE-DC, and other combinations. If the measurement capability of LTE continues to be used to report messages, the volume of messages will be larger and reporting will be more difficult.

Therefore, under this application, the access network device selects the secondary cell that supports the current cell DC of the terminal device to add. In this case, the terminal device can use noGAP measurement to measure the to-be-added after receiving the measurement configuration message The parameters of the SCG do not need to use GAP to measure, so there is no need for the terminal equipment to report the measurement capability, which saves communication resources and does not affect the normal communication data between the terminal equipment and the current cell.

In step S210, the access network device determines to add the primary selected SCG. At this time, the access network device sends a first configuration message to the terminal device, where the first configuration message is used to instruct the terminal device to measure the initially selected SCG in the cell where it is currently located. The form of the first configuration message may be as follows:

Wherein, the target Object in the first configuration message indicates that the first configuration message is a measurement configuration message for adding SCG.

It should be understood that the first configuration message is only for example, and this application does not limit the specific form of the first configuration message in any way.

The terminal device sends a first report to the access network device through noGAP measurement, and the first report includes the measurement result of the SCG of the secondary cell. The form of the first report can be as follows:

Wherein, the measID in the first report indicates that the first report is the first report for adding SCG.

It should be understood that the first report is only used as an example, and this application does not limit the specific form of the first report in any way.

Optionally, in the method 200, steps S211 to S221 of adding SCC and optimizing MIMO may also be included. The details are shown in Figure 6. Figure 6 shows a method of adding SCG. For S201 to S210, reference may be made to the description of FIG. 3, which will not be repeated here. The steps S211 to S221 are described below.

S211: The access network device sends a first configuration message to the terminal device, where the first configuration message is used to instruct the terminal device to measure the target SCG in the cell where it is currently located.

S212: The terminal device receives the first configuration message, and uses noGAP to measure the signal power of the target SCG.

S213: The terminal device sends a first report to the access network device, where the first report includes the measurement result of the target SCG.

S214: The access network device receives the first report, and determines to add the SCG according to the first report.

S215: The access network device sends a second configuration message to the terminal device, where the second configuration message is used to instruct the terminal device to measure the component carrier SCC in the cell where it is currently located.

S216: The terminal device receives the second configuration message, and measures the signal power of the component carrier SCC.

S217: The terminal device sends a second report to the access network device, where the second report includes the measurement result of the SCC.

S218: The access network device receives the second report, and determines to add an SCC according to the second report.

S219: The access network device sends a third configuration message to the terminal device, where the third configuration message is used to instruct the terminal device to optimize the MIMO capability in the cell where it is currently located.

S220: The terminal device receives the third configuration message and optimizes the MIMO capability.

S221: The terminal device sends a third report to the access network device, where the third report includes the result of MIMO optimization by the terminal device.

In this application, the access network equipment guarantees that the terminal equipment will add SCC and MIMO capability configuration after adding SCG to ensure the smooth addition of SCG to the terminal equipment, and there will be no CA and MIMO caused by the failure of SCG addition. Ability to fall back.

Among them, the component carrier SCC may also be referred to as a secondary carrier (sencondary carrier component, SCC). The carriers of terminal equipment in the same cell can be divided into primary carrier component (PCC) and SCC. The primary carrier component (PCC) is the cell where the terminal equipment establishes the initial connection, and generally corresponds to the PCC. The secondary cell Scell is a cell added through RRC reconfiguration. Additional frequency band resources generally correspond to SCC; PCC is always active, while SCC can be activated or deactivated through signaling (RRC connection reconfiguration); terminal equipment configured with CA is connected to 1 Pcell and up to 4 Scells at the same time .

It should be understood that in step S215, the access network device receives the second report. If the second report indicates that the signal of the added SCC cannot be detected, the access network device may resend the second configuration message to the terminal device. The message is used to instruct the terminal device to measure the SCC of another component carrier in the cell where it is currently located.

For the specific forms of the second configuration message, the third configuration message, the second report, and the third report, please refer to the first configuration message and the first report, which will not be repeated here.

It should be understood that the access network device preferentially adds SCG to the terminal device, and then performs SCC addition and MIMO capability configuration. Therefore, from the perspective of the interaction process between the access network device and the terminal device, the first configuration message, the second configuration message, and the second The third configuration message has a sequence between the first report, the second report, and the third report.

It should also be understood that the access network equipment ensures that after adding SCG to the terminal equipment, it can first add SCC and then perform MIMO capability configuration, or it can perform MIMO capability configuration first and then perform SCC addition.

In the method 200, when the access network device performs SCG addition, SCC addition, and MIMO capability configuration, it should be added according to the preferential selection of the DC combination, taking the intersection of the CA combination and the MIMO capability. Specifically, when the DC combination is satisfied, the combination that satisfies more CA combinations and has stronger MIMO capability is selected for SCG addition, and then SCC addition and MIMO capability configuration are performed. As shown in FIG. 7, FIG. 7 shows a schematic block diagram of adding SCG. In Figure 7, the SCG area that can be added as a primary selection is the outer rectangular area. The rectangle included in the outer rectangular area is the cell that supports DC combination. For a circular area that supports higher MIMO capability, the access network equipment selects the intersecting part of the circular area that supports CA combination and the circular area that represents higher MIMO capability in the internal test rectangular area as the SCG to be added.

In the existing mechanism for adding access network equipment, SCG addition, SCC addition, and MIMO capability configuration are independently initiated by the access network equipment, and the priority order is determined by the access network equipment. If the access network device is performing SCG addition, it is found that the terminal device has already added SCC or/and configured MIMO capability. At this time, the access network device needs to determine whether the terminal device currently added with SCC or/and configured with MIMO capability can form a dual connection with the alternative SCG cell, and add SCG when supporting DC. In the following, another method for adding a secondary cell group provided by the present application will be described in detail with reference to FIG. 8. FIG. 8 is a schematic flowchart of another method 400 for adding a secondary cell group according to the present application. The method 400 can be applied to the method 400 in FIG. In the illustrated scenario, it can of course also be applied to other communication scenarios, and the embodiment of the present application does not limit it here.

As shown in FIG. 8, the method 400 shown in FIG. 8 may include S401 to S413. Each step in the method 400 will be described in detail below in conjunction with FIG. 8.

S401: The access network device needs to determine whether the terminal device currently added with the SCC or/and configured with the MIMO capability can form a dual connection with the candidate SCG cell.

S402: When a terminal device with added SCC or/and configured MIMO capability can form a dual connection with an alternative SCG cell, send a first configuration message to the terminal device.

S403: When a terminal device that has added SCC or/and configured MIMO capabilities cannot form a dual connection with an alternative SCG cell, send an unlimited resource control RCC message to the terminal device. The RRC message is used to instruct the terminal device to fall back to carrier aggregation and / Or the number of MIMO.

S404: The access network device preliminarily selects the added SCG cell.

S405: The access network device determines whether the SCG cell added by the preliminary selection and the cell in which the current terminal device works meet the DC combination.

S406: If the added SCG cell of the primary selection and the cell in which the current terminal device works do not satisfy the DC combination, adjustment is made, and the added SCG cell is reselected.

S407: If the initially selected SCG cell and the cell in which the current terminal device works meet the DC combination, under the current combination, the access network device selects to add the component carrier SCC.

S408: The access network device determines whether the cell in which the added SCC and the current terminal device work meets the CA combination under the current combination.

S409: If the added SCC and the cell in which the current terminal device works satisfies the CA combination, under the current combination, the access network device improves the MIMO capability.

S410: If the added SCC and the cell in which the current terminal device works do not satisfy the CA combination, the access network device adjusts and selects the added SCC again.

S411: The access network device determines whether the improved MIMO capability is satisfied under the current combination.

S412: If the improved MIMO capability is satisfied under the current combination, the access network device adds the initially selected SCG.

S413: If the improved MIMO capability is not satisfied under the current combination, the access network device adjusts and reconfigures the MIMO quantity.

Under this method, it is possible to determine whether the currently added SCC and/or the configured MIMO number of terminal equipment supports dual connection with other cells in the current cell under the existing addition mechanism, and if not, perform SCC and/or MIMO fallback, re-add SCG to achieve priority to configure lossless nogap measurement for terminal equipment; at the same time, avoid the problem that GAP measurement cannot be detected or cannot be added when SCG is added; avoid SCC fallback and MIMO capability fallback, and by The data transmission loss caused by this.

The above describes that when a terminal device with added SCC or/and configured MIMO capability cannot form a dual connection with an alternative SCG cell, the access network device sends an unlimited resource control RCC message to the terminal device, and the RRC message is used to instruct the terminal device The number of back-off carrier aggregation and/or MIMO, and the number of back-off carrier aggregation and/or MIMO of the terminal device are initiated by the access network device.

The terminal device can also actively roll back the number of carrier aggregation and/or MIMO. When the current cell of the terminal device has performed carrier aggregation CA and/or configured MIMO quantity, and the terminal device cannot detect the secondary cell SCG according to the measurement GAP configured by the access network device, the terminal device actively rolls back the component carrier SCC and/or reduces MIMO quantity, where the current cell and candidate secondary cell group where the terminal device is currently located after backing off the component carrier SCC and/or reducing the MIMO quantity includes a cell group supporting dual-connection DC; The network device sends a feedback message, and the feedback message includes the current SCC quantity and MIMO quantity of the terminal equipment. The access network device receives the feedback message sent by the terminal device, and re-adds the SCG.

The method for measuring the communication parameters of the multi-card terminal device of the embodiment of the present application has been described in detail above in conjunction with FIG. 1 to FIG. 8. Hereinafter, the communication device according to the embodiment of the present application will be described in detail with reference to FIG. 9 to FIG. 11.

FIG. 9 shows a schematic block diagram of a communication device 500 according to an embodiment of the present application.

In some embodiments, the apparatus 500 may be a terminal device, or a chip or circuit, for example, a chip or circuit that can be provided in a terminal device.

In some embodiments, the apparatus 500 may be an access network device, or a chip or circuit, for example, a chip or circuit that can be provided in an access network device.

In a possible manner, the apparatus 500 may include a processing unit 510 (that is, an example of a processor) and a transceiver unit 530. In some possible implementation manners, the processing unit 510 may also be referred to as a determining unit. In some possible implementations, the transceiver unit 530 may include a receiving unit and a sending unit.

Optionally, the transceiver unit 530 may be implemented by a transceiver or a transceiver-related circuit or interface circuit.

Optionally, the device may further include a storage unit 520. In a possible manner, the storage unit 520 is used to store instructions. Optionally, the storage unit may also be used to store data or information. The storage unit 520 may be implemented by a memory.

In some possible designs, the processing unit 510 is configured to execute the instructions stored in the storage unit 520, so that the apparatus 500 implements the steps performed by the terminal device in the foregoing method. Alternatively, the processing unit 510 may be used to call the data of the storage unit 520, so that the apparatus 500 implements the steps performed by the terminal device in the foregoing method.

In some possible designs, the processing unit 510 is configured to execute the instructions stored in the storage unit 520, so that the apparatus 500 implements the steps performed by the access network device in the foregoing method. Alternatively, the processing unit 510 may be used to call the data of the storage unit 520, so that the apparatus 500 implements the steps performed by the access network device in the foregoing method.

For example, the processing unit 510, the storage unit 520, and the transceiving unit 530 can communicate with each other through an internal connection path to transfer control and/or data signals. For example, the storage unit 520 is used to store a computer program, and the processing unit 510 can be used to call and run the calculation program from the storage unit 520 to control the transceiver unit 530 to receive and/or send signals to complete the above method. Steps for terminal equipment or access network equipment. The storage unit 520 may be integrated in the processing unit 510, or may be provided separately from the processing unit 510.

Optionally, if the apparatus 500 is a communication device (for example, a terminal device or an access network device), the transceiver unit 530 includes a receiver and a transmitter. Among them, the receiver and the transmitter may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceivers.

Optionally, if the device 500 is a chip or a circuit, the transceiver unit 530 includes an input interface and an output interface.

As an implementation manner, the function of the transceiving unit 530 may be implemented by a transceiving circuit or a dedicated chip for transceiving. The processing unit 510 may be implemented by a dedicated processing chip, a processing circuit, a processing unit, or a general-purpose chip.

As another implementation manner, a general-purpose computer may be considered to implement the communication device (such as a terminal device or an access network device) provided in the embodiment of the present application. That is to say, the program code for realizing the functions of the processing unit 510 and the transceiving unit 530 is stored in the storage unit 520, and the general processing unit implements the functions of the processing unit 510 and the transceiving unit 530 by executing the code in the storage unit 520.

In some embodiments, the apparatus 500 may be a terminal device, or a chip or circuit provided in the terminal device.

When the device 500 is a terminal device, or a chip or circuit provided in the terminal device, the processing unit 510 is configured to determine, from among the candidate secondary cell groups, the cell group in which the terminal device is currently located supports dual-connection DC to be added. The cell group to be added includes at least one cell; the processing unit 510 is further configured to determine that the terminal device supports carrier aggregation CA and/or when the terminal device is dual-connected to the cell where the terminal device is currently located in the cell group to be added The cell that supports multiple input multiple output MIMO capabilities is the target secondary cell SCG; the transceiver unit 530 is configured to send a first configuration message to the terminal device, where the first configuration message is used to instruct the terminal device to perform the The target SCG is measured.

Optionally, the processing unit 510 determines that the supported CA is greater than the first threshold and/or when the number of MIMO supported by the terminal device is greater than the second threshold, determines that the cell is the target secondary cell SCG.

Optionally, the transceiving unit 530 is further configured to: when the cell where the terminal device is currently located has already performed carrier aggregation CA and/or configured with MIMO, and the candidate secondary cell group does not support dual When connecting to a DC cell, send an unlimited resource control RCC message to the terminal device, where the RRC message is used to instruct the terminal device to back off the carrier aggregation and/or the MIMO quantity.

Optionally, the transceiving unit 530 is configured to receive a feedback message sent by the terminal device, the feedback message including the cell where the terminal device is currently located and the number of MIMO, where the terminal device configured with the number of MIMO is currently located There is a cell group supporting dual-connection DC in the cell and the candidate secondary cell group.

Optionally, when the cell where the terminal device is currently located has performed carrier aggregation CA and/or MIMO configured, and there is a cell that supports dual-connection DC with the cell where the terminal device is currently located in the candidate secondary cell group, the The processing unit 510 determines from the candidate secondary cell group that the cell where the terminal device is currently located supports the target SCG of the dual-connectivity DC; the transceiver unit 530 sends the first configuration message to the terminal device.

Optionally, the transceiving unit 530 is configured to receive a first report sent by the terminal device, where the first report includes a measurement result of the SCG of the secondary cell.

Optionally, the transceiver unit 530 is configured to send a second configuration message to the terminal device, where the second configuration message is used to instruct the terminal device to measure the component carrier SCC in the cell where it is currently located; the transceiver unit 530 is configured to Receive a second report sent by the terminal device, where the second report includes the measurement result of the SCC.

Optionally, the transceiver unit 530 is configured to send a third configuration message to the terminal device, where the third configuration message is used to instruct the terminal device to configure the number of MIMO in the current cell; the transceiver unit 530 is configured to receive the terminal device The third report sent by the device, where the third report includes the number of MIMO configured by the terminal device in the cell where it is currently located.

Optionally, the DC includes a 5G connection ENDC whose access network device is a 5G core network or a 5G connection NEDC whose access network device is a 5G core network.

When the device 500 is configured in or is a terminal device, each module or unit in the device 500 can be used to perform various actions or processing procedures performed by the terminal device in the foregoing method. Here, in order to avoid redundant description, detailed descriptions are omitted.

In some embodiments, the apparatus 500 may be an access network device, or a chip or circuit provided in the access network device. When the apparatus 500 is an access network device, or a chip or a circuit provided in the access network device, 23. A terminal device, characterized in that it comprises: a processing unit 510, which is used for the terminal The cell where the device is currently located has performed carrier aggregation CA and/or configured with MIMO quantity. When the processing unit cannot detect the secondary cell SCG according to the measurement GAP configured by the access network device, the processing unit 510 backs off the component carrier SCC and/or reduces MIMO quantity, where the current cell and candidate secondary cell group where the terminal device is currently located after backing off the component carrier SCC and/or reducing the MIMO quantity includes a cell group supporting dual-connection DC; the transceiver unit 530 is used to connect to the The network access device sends a feedback message, the feedback message includes the current component carrier SCC quantity and MIMO quantity of the terminal equipment.

Optionally, the transceiving unit 530 is configured to receive a first configuration message sent by an access network device, where the first configuration message is used to instruct the terminal device to measure the target SCG in the cell where it is currently located; the processing unit 510 It is used to measure the target SCG according to the first configuration message; the transceiving unit 530 is used to send a first report to the access network device, and the first report includes the measurement result of the target SCG.

Optionally, the transceiver unit 530 is configured to receive a second measurement configuration message sent by the access network device, where the second configuration message is used to instruct the terminal device to measure the SCC in the cell where it is currently located; the processing unit 510 It is used to measure the SCC according to the second configuration message; the transceiving unit 530 is used to send a second report to the access network device, and the second report includes the measurement result of the SCC.

Optionally, the transceiver unit 530 is configured to receive a third configuration message sent by the access network device after the SCC is added, and the third configuration message is used to instruct the terminal device to configure the number of MIMO in the cell where it is currently located; The processing unit 510 is configured to configure the MIMO quantity according to the third configuration message; the transceiving unit 530 is configured to send a third report to the access network device, and the third report includes the configuration of the terminal device in the current cell. The number of MIMO.

When the device 500 is configured in or is an access network device, each module or unit in the device 500 can be used to perform various actions or processing procedures performed by the access network device in the foregoing method. Here, in order to avoid redundant description, it is omitted. Its detailed description.

For the concepts related to the technical solutions provided in the embodiments of the present application involved in the device 500, for explanations, detailed descriptions, and other steps, please refer to the descriptions of these contents in the foregoing method or other embodiments, which will not be repeated here.

FIG. 10 is a schematic structural diagram of a terminal device 600 provided by this application. The terminal device 600 can execute the actions performed by the terminal device in the foregoing method embodiments.

For ease of description, FIG. 10 only shows the main components of the terminal device. As shown in Fig. 10, the terminal device 600 includes a processor, a memory, a control circuit, an antenna, and an input and output device.

The processor is mainly used to process the communication protocol and communication data, and to control the entire terminal device, execute the software program, and process the data of the software program. For example, it is used to support the terminal device to execute the above-mentioned transmission precoding matrix instruction method embodiment. The described actions. The memory is mainly used to store software programs and data, for example, the codebook described in the above embodiments. The control circuit is mainly used for the conversion of baseband signals and radio frequency signals and the processing of radio frequency signals. The control circuit and the antenna together can also be called a transceiver, which is mainly used to send and receive radio frequency signals in the form of electromagnetic waves. Input and output devices, such as touch screens, display screens, keyboards, etc., are mainly used to receive data input by users and output data to users.

When the terminal device is turned on, the processor can read the software program in the storage unit, interpret and execute the instructions of the software program, and process the data of the software program. When data needs to be sent wirelessly, the processor performs baseband processing on the data to be sent, and outputs the baseband signal to the radio frequency circuit. The radio frequency circuit performs radio frequency processing on the baseband signal and sends the radio frequency signal to the outside in the form of electromagnetic waves through the antenna. When data is sent to the terminal device, the radio frequency circuit receives the radio frequency signal through the antenna, converts the radio frequency signal into a baseband signal, and outputs the baseband signal to the processor, and the processor converts the baseband signal into data and processes the data.

Those skilled in the art can understand that, for ease of description, FIG. 10 only shows a memory and a processor. In an actual terminal device, there may be multiple processors and memories. The memory may also be referred to as a storage medium or a storage device, etc., which is not limited in the embodiment of the present application.

For example, the processor may include a baseband processor and a central processing unit. The baseband processor is mainly used to process communication protocols and communication data. The central processing unit is mainly used to control the entire terminal device, execute software programs, and process software programs. data. The processor in FIG. 10 integrates the functions of the baseband processor and the central processing unit. Those skilled in the art can understand that the baseband processor and the central processing unit may also be independent processors and are interconnected by technologies such as a bus. Those skilled in the art can understand that the terminal device may include multiple baseband processors to adapt to different network standards, the terminal device may include multiple central processors to enhance its processing capabilities, and the various components of the terminal device may be connected through various buses. The baseband processor may also be expressed as a baseband processing circuit or a baseband processing chip. The central processing unit can also be expressed as a central processing circuit or a central processing chip. The function of processing the communication protocol and the communication data can be built in the processor, or can be stored in the storage unit in the form of a software program, and the processor executes the software program to realize the baseband processing function.

Exemplarily, in the embodiment of the present application, the antenna and the control circuit with the transceiving function can be regarded as the transceiving unit 610 of the terminal device 600, and the processor with the processing function can be regarded as the processing unit 620 of the terminal device 600. As shown in FIG. 10, the terminal device 600 includes a transceiving unit 610 and a processing unit 620. The transceiving unit may also be referred to as a transceiver, a transceiver, a transceiving device, and so on. Optionally, the device for implementing the receiving function in the transceiving unit 610 can be regarded as the receiving unit, and the device for implementing the sending function in the transceiving unit 610 can be regarded as the sending unit, that is, the transceiving unit includes a receiving unit and a sending unit. Exemplarily, the receiving unit may also be called a receiver, a receiver, a receiving circuit, etc., and the sending unit may be called a transmitter, a transmitter, or a transmitting circuit, etc.

FIG. 11 is a schematic structural diagram of an access network device 700 provided by an embodiment of this application, which can be used to implement the access device (for example, the first access network device, the second access network device, or the third access network device) in the above method. Access network equipment) function. The access network equipment 700 includes one or more radio frequency units, such as a remote radio unit (RRU) 710 and one or more baseband units (BBU) (also referred to as digital units, digital units, DU)720. The RRU 710 may be called a transceiver unit, a transceiver, a transceiver circuit, or a transceiver, etc., and it may include at least one antenna 711 and a radio frequency unit 712. The RRU 710 part is mainly used for sending and receiving of radio frequency signals and conversion of radio frequency signals and baseband signals, for example, for sending the signaling messages described in the foregoing embodiments to terminal equipment. The BBU720 part is mainly used to perform baseband processing, control the base station, and so on. The RRU 710 and the BBU 720 may be physically set together, or may be physically separated, that is, a distributed base station.

The BBU 720 is the control center of the base station, and may also be called a processing unit, which is mainly used to complete baseband processing functions, such as channel coding, multiplexing, modulation, and spreading. For example, the BBU (processing unit) 720 may be used to control the base station 40 to execute the operation procedure of the access network device in the foregoing method embodiment.

In an example, the BBU720 may be composed of one or more single boards, and multiple single boards may jointly support a radio access network of a single access standard (such as an LTE system or a 5G system), and may also support different access networks respectively. Enter the standard wireless access network. The BBU 720 further includes a memory 721 and a processor 722. The memory 721 is used to store necessary instructions and data. For example, the memory 721 stores the codebook and the like in the foregoing embodiment. The processor 722 is configured to control the base station to perform necessary actions, for example, to control the base station to execute the operation procedure of the access network device in the foregoing method embodiment. The memory 721 and the processor 722 may serve one or more single boards. In other words, the memory and the processor can be set separately on each board. It can also be that multiple boards share the same memory and processor. In addition, necessary circuits can be provided on each board.

In a possible implementation manner, with the development of system-on-chip (SoC) technology, all or part of the functions of part 720 and part 710 can be implemented by SoC technology, for example, a base station function chip Realization, the base station function chip integrates a processor, a memory, an antenna interface and other devices, the program of the base station related functions is stored in the memory, and the processor executes the program to realize the relevant functions of the base station. Optionally, the base station function chip can also read a memory external to the chip to implement related functions of the base station.

It should be understood that the structure of the access network device illustrated in FIG. 11 is only a possible form, and should not constitute any limitation in the embodiment of the present application. This application does not exclude the possibility of other types of base station structures that may appear in the future.

It should be understood that, in this embodiment of the application, the processor may be a central processing unit (central processing unit, CPU), and the processor may also be other general-purpose processors, digital signal processors (digital signal processors, DSP), and dedicated integration Circuit (application specific integrated circuit, ASIC), ready-made programmable gate array (field programmable gate array, FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components, etc. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor or the like.

It should also be understood that the memory in the embodiments of the present application may be volatile memory or non-volatile memory, or may include both volatile and non-volatile memory. Among them, the non-volatile memory can be read-only memory (ROM), programmable read-only memory (programmable ROM, PROM), erasable programmable read-only memory (erasable PROM, EPROM), and electrically available Erase programmable read-only memory (electrically EPROM, EEPROM) or flash memory. The volatile memory may be random access memory (RAM), which is used as an external cache. By way of exemplary but not restrictive description, many forms of random access memory (RAM) are available, such as static random access memory (static RAM, SRAM), dynamic random access memory (DRAM), and synchronous dynamic random access memory (DRAM). Access memory (synchronous DRAM, SDRAM), double data rate synchronous dynamic random access memory (double data rate SDRAM, DDR SDRAM), enhanced synchronous dynamic random access memory (enhanced SDRAM, ESDRAM), synchronous connection dynamic random access memory Take memory (synchlink DRAM, SLDRAM) and direct memory bus random access memory (direct rambus RAM, DR RAM).

The above-mentioned embodiments may be implemented in whole or in part by software, hardware, firmware or any other combination. When implemented by software, the above-mentioned embodiments may be implemented in the form of a computer program product in whole or in part. The computer program product includes one or more computer instructions or computer programs. When the computer instructions or computer programs are loaded or executed on the computer, the processes or functions described in the embodiments of the present application are generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website, computer, server, or data center. Transmission to another website, computer, server or data center via wired (such as infrared, wireless, microwave, etc.). The computer-readable storage medium may be any available medium that can be accessed by a computer or a data storage device such as a server or a data center that includes one or more sets of available media. The usable medium may be a magnetic medium (for example, a floppy disk, a hard disk, and a magnetic tape), an optical medium (for example, a DVD), or a semiconductor medium. The semiconductor medium may be a solid state drive.

The embodiments of the present application also provide a computer-readable medium on which a computer program is stored. When the computer program is executed by a computer, the steps performed by the terminal device in any of the above embodiments or the steps performed by the access network device are implemented. .

The embodiments of the present application also provide a computer program product, which, when executed by a computer, implements the steps performed by the terminal device in any of the foregoing embodiments or the steps performed by the access network device.

An embodiment of the present application also provides a system chip, which includes: a communication unit and a processing unit. The processing unit may be a processor, for example. The communication unit may be, for example, a communication interface, an input/output interface, a pin or a circuit, or the like. The processing unit can execute computer instructions, so that the chip in the communication device executes the steps executed by the terminal device provided in the embodiment of the present application or the steps executed by the access network device.

Optionally, the computer instructions are stored in a storage unit.

According to the method provided in the embodiment of the present application, the embodiment of the present application also provides a communication system, which includes the aforementioned access network device and terminal device.

The various embodiments in this application can be used independently or in combination, which is not limited here.

In addition, various aspects or features of the present application can be implemented as methods, devices, or products using standard programming and/or engineering techniques. The term "article of manufacture" used in this application encompasses a computer program accessible from any computer-readable device, carrier, or medium. For example, computer-readable media may include, but are not limited to: magnetic storage devices (for example, hard disks, floppy disks, or tapes, etc.), optical disks (for example, compact discs (CD), digital versatile discs (DVD)) Etc.), smart cards and flash memory devices (for example, erasable programmable read-only memory (EPROM), cards, sticks or key drives, etc.). In addition, various storage media described herein may represent one or more devices and/or other machine-readable media for storing information. The term "machine-readable medium" may include, but is not limited to, wireless channels and various other media capable of storing, containing, and/or carrying instructions and/or data.

It should be understood that "and/or" describes the association relationship of the associated objects, which means that there can be three kinds of relationships, for example, A and/or B, which can mean: A alone exists, A and B exist at the same time, and B alone exists. Condition. The character "/" generally indicates that the associated objects before and after are in an "or" relationship. "At least one" refers to one or more than one; "At least one of A and B", similar to "A and/or B", describes the association relationship of associated objects, indicating that there can be three relationships, for example, A and B At least one of them can mean: A alone exists, A and B exist at the same time, and B exists alone.

A person of ordinary skill in the art may realize that the units and algorithm steps of the examples described in combination with the embodiments disclosed herein can be implemented by electronic hardware or a combination of computer software and electronic hardware. Whether these functions are executed by hardware or software depends on the specific application and design constraint conditions of the technical solution. Professionals and technicians can use different methods for each specific application to implement the described functions, but such implementation should not be considered beyond the scope of this application.

Those skilled in the art can clearly understand that, for the convenience and conciseness of description, the specific working process of the system, device and unit described above can refer to the corresponding process in the foregoing method embodiment, which will not be repeated here.

In the several embodiments provided in this application, it should be understood that the disclosed system, device, and method can be implemented in other ways. For example, the device embodiments described above are merely illustrative, for example, the division of the units is only a logical function division, and there may be other divisions in actual implementation, for example, multiple units or components may be combined or It can be integrated into another system, or some features can be ignored or not implemented. In addition, the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, and may be in electrical, mechanical or other forms.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objectives of the solutions of the embodiments.

In addition, the functional units in the various embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units may be integrated into one unit.

If the function is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer readable storage medium. Based on this understanding, the technical solution of the present application essentially or the part that contributes to the existing technology or the part of the technical solution can be embodied in the form of a software product, and the computer software product is stored in a storage medium, including Several instructions are used to make a computer device (which may be a personal computer, a server, or an access network device, etc.) execute all or part of the steps of the methods described in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (Read-Only Memory, ROM), random access memory (Random Access Memory, RAM), magnetic disk or optical disk and other media that can store program code .

The above are only specific implementations of this application, but the protection scope of this application is not limited to this. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed in this application. Should be covered within the scope of protection of this application. Therefore, the protection scope of this application should be subject to the protection scope of the claims.

Claims

A method for adding a secondary cell group SCG, characterized in that it includes:

Determine, from the candidate secondary cell groups, a cell group to be added that supports dual connectivity DC with the cell where the terminal device is currently located, where the cell group to be added includes at least one cell;

In the cell group to be added, when it is determined that the terminal device is dual-connected to the cell where the terminal device is currently located, the terminal device supports carrier aggregation CA and/or supports multiple input multiple output MIMO capabilities as the target secondary cell group SCG ；

Send a first configuration message to the terminal device, where the first configuration message is used to instruct the terminal device to measure the target SCG in the cell where it is currently located.
The method according to claim 1, wherein in the cell group to be added, when it is determined that the terminal device is dual-connected to the cell where the terminal device is currently located, the terminal device supports carrier aggregation CA and/or The target SCG is the cell that supports multiple input multiple output MIMO capability, including:

When the CA supported by the terminal device is greater than the first threshold and/or when the number of MIMO supported by the terminal device is greater than the second threshold, it is determined that the cell is the target SCG.
The method according to claim 1 or 2, characterized in that, in the secondary cell group that is determined from the candidate secondary cell group, the cell group to be added that supports dual connectivity DC with the cell in which the terminal device is currently located is determined, and the to-be-added cell group is Before the cell group includes at least one cell, the method further includes:

When the cell where the terminal device is currently located has performed carrier aggregation CA and/or configured with MIMO, and the candidate secondary cell group does not have a cell that supports dual-connection DC with the cell where the terminal device is currently located, report to the The terminal device sends an unlimited resource control RCC message, where the RRC message is used to instruct the terminal device to back off the carrier aggregation and/or the number of MIMO.
The method according to claim 1 or 2, characterized in that, in the secondary cell group that is determined from the candidate secondary cell group, the cell group to be added that supports dual connectivity DC with the cell in which the terminal device is currently located is determined, and the to-be-added cell group is Before the cell group includes at least one cell, the method further includes:

Receive a feedback message sent by the terminal device, where the feedback message includes the cell where the terminal device is currently located and the number of MIMO, where the cell where the terminal device is configured with the number of MIMO is currently located and the alternative There is a cell group that supports dual-connection DC in the secondary cell group.
The method according to claim 1 or 2, characterized in that, when the cell where the terminal device is currently located has already performed carrier aggregation CA and/or configured MIMO, and the candidate secondary cell group exists and the The cell where the terminal device is currently located supports a dual-connected DC cell, and the method further includes:

Determining, from the candidate secondary cell group, the target SCG that supports the dual-connectivity DC with the cell where the terminal device is currently located;

Sending the first configuration message to the terminal device.
The method according to any one of claims 1 to 5, wherein the method further comprises:

Receiving a first report sent by the terminal device, where the first report includes a measurement result of the secondary cell SCG.
The method according to claim 6, wherein the method further comprises:

Sending a second configuration message to the terminal device, where the second configuration message is used to instruct the terminal device to measure the component carrier SCC in the cell where it is currently located;

Receiving a second report sent by the terminal device, where the second report includes a measurement result of the SCC.
The method according to claim 6 or 7, wherein the method further comprises:

Sending a third configuration message to the terminal device, where the third configuration message is used to instruct the terminal device to configure the number of MIMO in the cell where it is currently located;

Receive a third report sent by the terminal device, where the third report includes the number of MIMO configured by the terminal device in the cell where the terminal device is currently located.
The method according to any one of claims 1 to 8, wherein the DC comprises an access network device that is a 5G core network that is a 4G connection ENDC or an access network device that is a 4G core network that is a 5G connection NEDC .
A method for adding a secondary cell group, characterized in that it includes:

When the cell where the terminal device is currently located has already performed carrier aggregation CA and/or configured MIMO quantity, and the terminal device cannot detect the secondary cell SCG according to the measurement GAP configured by the access network device, the terminal device rolls back the component carrier SCC and/or reducing the number of MIMO, where the current cell and the candidate secondary cell group where the terminal device is currently located after backing off the component carrier SCC and/or reducing the number of MIMO include a cell group supporting dual connectivity DC;

Send a feedback message to the access network device, where the feedback message includes the current number of component carriers SCC and MIMO of the terminal device.
The method according to claim 10, wherein the method further comprises:

Receiving a first configuration message sent by an access network device, where the first configuration message is used to instruct the terminal device to measure the target SCG in the cell where it is currently located;

Measure the target SCG according to the first configuration message;

Send a first report to the access network device, where the first report includes a measurement result of the target SCG.
The method according to claim 11, wherein the method further comprises:

Receiving a second configuration message sent by the access network device, where the second configuration message is used to instruct the terminal device to measure the SCC in the cell where it is currently located;

Measure the SCC according to the second configuration message;

Send a second report to the access network device, where the second report includes the measurement result of the SCC.
The method according to claim 11 or 12, wherein the method further comprises:

After adding the SCC, receiving a third configuration message sent by the access network device, where the third configuration message is used to instruct the terminal device to configure the number of MIMO in the cell where it is currently located;

Configure the number of MIMO according to the third configuration message;

A third report is sent to the access network device, where the third report includes the number of MIMO configured by the terminal device in the cell where it is currently located.
An access network equipment, characterized in that it comprises:

A processing unit, configured to determine, from the candidate secondary cell group, a cell group to be added that supports dual connectivity DC with the cell where the terminal device is currently located, and the cell group to be added includes at least one cell;

The processing unit is further configured to determine that the terminal device supports carrier aggregation CA and/or supports multiple-input multiple-output MIMO capability when it is determined that the terminal device is dual-connected to the cell where the terminal device is currently located in the group of cells to be added. The cell is the target secondary cell group SCG;

The transceiver unit is configured to send a first configuration message to the terminal device, where the first configuration message is used to instruct the terminal device to measure the target SCG in the cell where it is currently located.
The access network device according to claim 14, wherein, in the cell group to be added, when it is determined that the terminal device is dual-connected to the cell where the terminal device is currently located, the terminal device supports carrier aggregation CA And/or the cell that supports multiple input multiple output MIMO capability is the target secondary cell SCG, including:

When the CA supported by the terminal device is greater than the first threshold and/or when the number of MIMO supported by the terminal device is greater than the second threshold, it is determined that the cell is the target secondary cell SCG.
The access network device according to claim 14 or 15, wherein the transceiver unit is further configured to:

When the cell where the terminal device is currently located has performed carrier aggregation CA and/or configured with MIMO, and the candidate secondary cell group does not have a cell that supports dual-connection DC with the cell where the terminal device is currently located, report to the The terminal device sends an unlimited resource control RCC message, where the RRC message is used to instruct the terminal device to back off the carrier aggregation and/or the number of MIMO.
The access network device according to claim 14 or 15, wherein the transceiving unit is configured to receive a feedback message sent by the terminal device, and the feedback message includes the cell in which the terminal device is currently located and the MIMO There is a cell group supporting dual-connection DC in the cell where the terminal device is currently located and the candidate secondary cell group configured with the MIMO quantity.
The access network device according to claim 14 or 15, wherein when the cell where the terminal device is currently located has already performed carrier aggregation CA and/or configured MIMO, and the candidate secondary cell group exists And a cell that supports dual-connection DC with the cell where the terminal device is currently located, the access network device further includes:

Determining, from the candidate secondary cell group, the target SCG that supports the dual-connectivity DC with the cell where the terminal device is currently located;

Sending the first configuration message to the terminal device.
The access network device according to any one of claims 14 to 18, wherein the transceiving unit is configured to receive a first report sent by the terminal device, and the first report includes reporting to the secondary cell The result of the measurement performed by the SCG.
The access network device according to claim 19, wherein the transceiving unit is configured to send a second measurement configuration message to the terminal device, and the second configuration message is used to indicate that the terminal device is currently located. Measure the component carrier SCC under the cell of

The transceiver unit is configured to receive a second report sent by the terminal device, where the second report includes a measurement result of the SCC.
The access network device according to claim 19 or 20, wherein the transceiver unit is configured to send a third configuration message to the terminal device, and the third configuration message is used to indicate that the terminal device is currently Configure the number of MIMO in the cell where it is located;

The transceiving unit is configured to receive a third report sent by the terminal device, where the third report includes the number of MIMO configured by the terminal device in the cell where it is currently located.
The access network device according to any one of claims 14 to 21, wherein the DC includes a connection ENDC where the access network device is 5G, the core network is 4G, or the access network device is 4G, and the core network is 5G. Connect NEDC.
A communication device, characterized in that the device includes at least one processor, and the at least one processor is coupled with at least one memory:

The at least one processor is configured to execute a computer program or instruction stored in the at least one memory, so that the device executes the method according to any one of claims 1 to 9, or any one of 10 to 13 The method described in one item.
A computer-readable storage medium, characterized in that a computer program or instruction is stored in the computer-readable storage medium, and when the computer reads and executes the computer program or instruction, the computer is caused to execute as claimed in claims 1 to 9. The method of any one of, or the method of any one of 10-13.
A chip, characterized by comprising: a processor, configured to call and run a computer program from a memory, so that a communication device installed with the chip executes the method according to any one of claims 1 to 9, or The method of any one of 10-13.