WO2022120524A1

WO2022120524A1 - Handover method, apparatus, and system for non-standalone network and standalone network

Info

Publication number: WO2022120524A1
Application number: PCT/CN2020/134281
Authority: WO
Inventors: 李靖; 卢哲军
Original assignee: 华为技术有限公司
Priority date: 2020-12-07
Filing date: 2020-12-07
Publication date: 2022-06-16
Also published as: CN114916250A

Abstract

Embodiments of the present application provide a handover method, apparatus, and system for a non-standalone (NSA) network and a standalone (SA) network, being used for solving the problem of a low communication rate caused by unsynchronized time between a 4G base station and a 5G base station, and ensuring the smooth handover of a terminal between the NSA network and the SA network. The method mainly comprises: for a terminal in an evolved universal terrestrial radio access (E-UTRA) and new radio (NR) dual connectivity (EN-DC) state, receiving, from an E-UTRA cell, an instruction of measuring a first NR cell, and from an NR cell, an indication of measuring a second cell; and when the time of the E-UTRA cell and the time of the first NR cell are not synchronized, according to a measurement result of a second NR cell, reporting a measurement report message of the first NR cell, wherein the first NR cell and the second NR cell are the same cell.

Description

Method, device and system for switching between non-independent networking and independent networking

technical field

The present application relates to the field of communications, and in particular, to a method, device and system for switching between non-independent networking and independent networking.

Background technique

During the discussion of the 5th generation (5G) communication technology in the 3rd generation partnership project (3GPP) technical specification, based on factors such as deployment cost, time, and service experience, a proposal including stand-alone (stand- Alone, SA) networking and non-standalone (non-stand alone, NSA) networking and other 5G and fourth generation (4th generation, 4G) communication interoperability solutions. Among them, the SA networking solution is that the 5G new radio (NR) directly accesses the 5G core network, the control signaling is completely independent of the 4G network, and the collaboration between the 5G network and the 4G network is achieved through core network interoperability. NSA networking supports dual connectivity features such as evolved universal terrestrial radio access (E-UTRA) and new wireless dual connectivity (E-UTRA NR dual connectivity, EN-DC). Specifically, NSA The networking solution is to anchor the 5G control signaling on the 4G base station, and access the evolved packet core (EPC) or the next generation core (NGC) of the 5G communication system through the 4G base station. . In the operator's 5G network construction, the NSA network and the SA network are mainly used in the hybrid network, and there are many overlapping areas where the NSA network and the SA network are deployed. It is necessary to switch between NSA networking and SA networking.

For frequency division duplex (FDD) long term evolution (LTE) base stations, the carrier aggregation and uplink cooperation between stations can be performed normally without the need for global positioning system (GPS) signal synchronization time. For 4G regular services other than coordinated multipoint communication, some operators have abandoned the deployment of GPS receivers in 4G base stations, that is, some base stations in the existing 4G network lack GPS signal synchronization, which causes some LTE base stations and NR base stations to be out of time synchronization. In this case, 5G-enabled terminals may not be able to switch from NSA networking to SA networking, affecting user experience.

Therefore, it is worth studying how to perform smooth handover between NSA networking and SA networking when the base station time is not synchronized.

SUMMARY OF THE INVENTION

The present application provides a method, device and system for switching between NSA networking and SA networking in combination with various embodiments, which are used to ensure smooth switching of terminals between NSA networking and SA networking, as well as communication services for terminals quality.

It should be understood that the methods in the embodiments of the present application may be executed by a wireless communication device, and the wireless communication device may be the entire computer of the computing device, or may be part of the device in the computing device, such as a chip related to a wireless communication function, such as a system chip, communication chip. Among them, the system-on-a-chip is also called a system-on-chip, or a SoC chip. Specifically, the wireless communication device may be a terminal such as a smart phone, or may be a system chip or a communication chip that can be provided in the terminal. The communication chip may include one or more of a radio frequency processing chip and a baseband processing chip. Baseband processing chips are also sometimes called modems or baseband processors. In physical implementation, the communication chip may be integrated inside the SoC chip or not integrated with the SoC chip. For example, the baseband processing chip is integrated in the SoC chip, and the radio frequency processing chip is not integrated with the SoC chip.

In a first aspect, an embodiment of the present application provides a communication method, including:

Receive a first measurement indication message from the first cell, where the first measurement indication message is used to instruct the user equipment UE to measure the first new wireless NR cell; receive a second measurement indication message from the second cell, the second measurement indication message It is used to instruct the UE to measure the second NR cell, where the first NR cell and the second NR cell are the same cell; when the time of the first cell and the first NR cell is not synchronized, according to the measurement of the second NR cell As a result, a measurement report message for the first NR cell is sent.

It should be understood that, when the UE resides in the first cell and the second cell, when the time of the first cell and the first NR cell is not synchronized, since the measurement interval cannot be aligned with the synchronization signal block of the first NR cell, generally the terminal does not measure with high probability. Even with the measurement result of the first NR cell, the terminal cannot report the measurement report of the first NR cell and switch to the first NR cell. The measurement report message of the first NR cell is reported according to the measurement result of the second NR cell measured in response to the second measurement instruction message of the second cell. Communication quality and communication continuity of the UE.

In a possible implementation manner, the method further includes: receiving a second RRC connection reconfiguration message, where the second RRC connection reconfiguration is used to instruct the UE to release the secondary cell group; release the secondary cell group; receive a handover message, The handover message is used to instruct the UE to handover to the first NR cell.

In a possible implementation manner, the method further includes: the UE camping on the first NR cell.

It should be understood that after receiving the above-mentioned RRC release message and the second RRC reconfiguration message, the terminal can switch from the dual-connection state of camping on the first cell and the second cell to the single-connection state camping on the first NR cell, that is, from the NSA The networking is switched to SA networking.

In a possible implementation manner, the first measurement indication message is an RRC connection reconfiguration message, and the second test indication message is an RRC reconfiguration message.

In a possible implementation manner, the first measurement indication message is further used to indicate that the reporting configuration of the first NR cell is a B1 event or a B2 event.

In a possible implementation manner, the second measurement indication message is further used to indicate that the reporting configuration of the second NR cell is one of an A1 event, an A2 event, an A3 event, an A4 event and an A5 event.

In a possible implementation manner, the first cell is an evolved universal terrestrial radio access E-UTRA cell, and the second cell is an NR cell.

It should be understood that, for a terminal in the EN-DC state, from the NSA networking environment to the SA networking environment, the above method can ensure that the terminal can report the measurement of the NR cell to be switched in time when the LTE base station and the NR base station are out of sync. The report ensures the smooth switching between the NSA networking and the SA networking, and avoids staying in the NSA networking for a long time and eventually returning to the LTE single-connection state.

In a second aspect, an embodiment of the present application provides a wireless communication device, including: a receiving unit and a sending unit;

The receiving unit is configured to receive a first measurement instruction message from the first cell, where the first measurement instruction message is used to instruct the user equipment UE to measure the first new wireless NR cell; the receiving unit is further configured to receive the first measurement instruction message from the second cell The second measurement indication message, the second measurement indication message is used to instruct the UE to measure the second NR cell, wherein the first NR cell and the second NR cell are the same cell; the sending unit is used for the first cell and the second NR cell. When the time of the first NR cell is not synchronized, a measurement report message of the first NR cell is sent according to the measurement result of the second NR cell.

In a possible implementation manner, the communication apparatus further includes a processing unit, and the receiving unit is further configured to receive a second RRC connection reconfiguration message, where the second RRC connection reconfiguration is used to instruct the UE to release the secondary cell group; the The processing unit is further configured to release the secondary cell group; the receiving unit is further configured to receive a handover message, where the handover message is used to instruct the UE to switch to the first NR cell.

In a third aspect, an embodiment of the present application provides a computer-readable storage medium, where program codes are stored in the computer-readable storage medium, and when the program codes are executed by a terminal or a processor in the terminal, to implement the steps from the first aspect to the Any aspect of the second aspect or any possible implementation of the method in any aspect.

In a fourth aspect, an embodiment of the present application provides a computer program product, when program codes included in the computer program product are executed by a processor in a terminal, to implement any one of the first aspect to the second aspect or any one of any aspect. A possible implementation of this method.

In a fifth aspect, an embodiment of the present application provides a communication system, including: a wireless network device, and a wireless communication apparatus including the third aspect or any possible implementation manner of the third aspect.

The wireless network device may be a wireless network device of an E-UTRA cell.

It should be understood that, for the technical solution details and technical effects involved in any possible implementation of the second aspect to the fifth aspect or any aspect, reference may be made to the technology of the first aspect or any possible implementation of the first aspect The details and technical effects will not be repeated here.

Description of drawings

FIG. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application;

FIG. 2 is a schematic structural diagram of a non-independent networking according to an embodiment of the present application;

3 is a schematic flowchart of switching from a non-independent networking to an independent networking according to an embodiment of the present application;

3 is a schematic diagram of a terminal measurement configuration when a long-term evolution base station and a new radio base station are time synchronized according to an embodiment of the present application;

4 is a schematic diagram of a terminal measurement configuration when a long-term evolution base station and a new radio base station are not time-synchronized according to an embodiment of the present application;

FIG. 5 is a schematic flowchart of a communication method provided by an embodiment of the present application;

6 is a schematic flowchart of a communication method for switching between a non-independent networking and an independent networking according to an embodiment of the present application;

FIG. 7 is a schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a communication device according to an embodiment of the present application;

FIG. 9 is a schematic structural diagram of a wireless communication apparatus according to an embodiment of the present application.

It should be understood that, in the above structural schematic diagram, the size and shape of each block diagram are for reference only, and should not constitute an exclusive interpretation of the embodiments of the present application. The relative positions and inclusion relationships among the block diagrams presented in the structural schematic diagram only schematically represent the structural associations between the block diagrams, and do not limit the physical connection manners of the embodiments of the present application.

Detailed ways

The technical solutions provided by the present application are further described below with reference to the accompanying drawings and examples. It should be understood that the system structure and service scenarios provided in the embodiments of the present application are mainly to illustrate possible implementations of the technical solutions of the present application, and should not be construed as the only limitations on the technical solutions of the present application. Those of ordinary skill in the art know that with the evolution of the system structure and the emergence of new service scenarios, the technical solutions provided in this application are also applicable to similar technical problems.

It should be understood that the embodiments of the present application provide a method, device and system for switching between non-independent networking and independent networking, so as to ensure the quality of service of terminal communication under NSA networking and SA networking.

Since the principles for solving problems of these technical solutions are the same or similar, in the introduction of the following specific embodiments, some repetitive parts may not be repeated, but it should be considered that these specific embodiments have been referenced to each other and can be combined with each other.

FIG. 1 is a schematic structural diagram of a communication system according to an embodiment of the present application. Referring to FIG. 1, in a communication system 00, there are one or more terminals 01 in communication with a radio access network (RAN). The RAN includes one or more network devices 02 . It should be understood that, for the sake of clarity, only one network device and one terminal are shown in FIG. 1 . Optionally, the communication system may further include a core network (core network) that can communicate with the RAN, where the core network may be the EPC of the 4G communication system or the NGC of the 5G communication system. Further optionally, the communication system may also include one or more external networks interconnected with the core network. For example, Internet, public switched telephone network, etc.

It should be understood that the communication system can be used as an example of a mobile communication system based on 3GPP technical specifications, and can also cover wireless communication systems based on other wireless communication standards, such as 802 of the Institute of Electrical and Electronics Engineers (IEEE). Series, such as 802.11, 802.15, 802.20 and other wireless communication standards.

The terminal 01 may also be called a user equipment (user equipment, UE), a mobile station (mobile station, MS) or a subscriber unit (subscriber unit, SU). In the description of the embodiments of this application, no distinction is made between a terminal and a UE. . The terminal can specifically be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, a wearable device (smart watch, smart bracelet, smart helmet, smart glasses, etc.), and other devices with wireless connectivity. Connected communication devices, such as various IoT devices, including smart home devices (smart meters, smart home appliances, etc.), smart vehicles, etc. The network device 02 is a computing device with a wireless communication function. It should be understood that the network device 02 may be a wireless access network device such as a base station. The base station may specifically be an evolved Node B (evolved Node B, eNB or eNodeB) of a 4G communication system, or a next generation Node B (gNodeB or gNB) of a 5G communication system, or other possible wireless access technologies. base station. The physical form and transmit power of the base station can also be various, such as a macro base station (macro base station) or a micro base station (micro base station).

FIG. 2 is a schematic structural diagram of a non-independent networking according to an embodiment of the present application. Referring to Figure 2, in the NSA networking, both the Long Term Evolution (LTE) Evolved Node B (LTE eNB) and the Next Generation Node B (gNB) are connected to the Evolved Packet Core (EPC), the core network of the 4G communication system. Here, the LTE eNB acts as the master node and is connected to the EPC in the control plane, and the gNB acts as the secondary node. In other words, the control plane signaling is anchored on the LTE eNB, and the user plane can be served by the LTE eNB or the gNB independently, or by the LTE eNB and the gNB simultaneously. The serving cell associated with the master node is called a master cell group (MCG), and the serving cell associated with the secondary node is called a secondary cell group (SCG). Typically, the network configures the terminal with an MCG, and zero or one SCG. After the terminal accesses the LTE network, the LTE eNB configures a measurement event for the terminal to trigger the terminal to measure the NR neighbor cell. According to the measurement result reported by the terminal, the LTE eNB selects the NR neighbor cell that meets the conditions and adds it to the SCG.

It should be understood that the network device can configure the terminal to perform different types of measurements, such as NR measurement, E-UTRA frequency inter-radio access technology (Inter-RAT) measurement (also called inter-system measurement), refer to 3GPP technology Specification (such as 3GPP TS38.133 V16.5.0), for UE in synchronous (intra-band) EN-DC state, when E-UTRA primary cell (primary cell, PCell) and secondary primary cell (primary When the secondary cell, PSCell) configures the UE to monitor the same NR carrier frequency layer, as long as the system frame number (SFN) is aligned with the slot boundary, the NR carrier frequency layer shall only be included in the effective NR. The total number of carrier frequency layers once, unless the NR carrier frequency layer to listen to for this configuration has:

(1) Different received signal strength indicator (RSSI) measurement resources; or

(2) Different derived synchronization signal block (SSB) (deriveSSB-IndexFromCell) indications from cells; or

(3) Different SSB measurement timing configurations (SSB measurement timing configuration, SMTC); or

(4) Different common SSB locations quasi-colocation (QCL) (eg, ssb-PositionQCL-Common-r16) indication or SSB on the NR carrier frequency layer with contiguous carrier aggregation (CCA) a list of cells for the location QCL (ssb-PositionQCL); or

(5) RSSI measurement timing configuration (RMTC) configuration (rmtc-Config) indication of different NR carrier frequency layers with CCA.

That is, for the UE under the NSA networking, if the E-UTRA base station and the NR base station are configured to perform the same NR frequency measurement, the measurement combination can be performed only when the following conditions are met:

(1) The carrier frequency of LTE and the carrier frequency of NR belong to the same frequency band;

(2) The LTE side and the NR side are time synchronized;

(3) The RSSI measurement resources are the same;

(4) The derived SSB (deriveSSB-IndexFromCell) from the cell indicates the same;

(5) SMTC is the same;

(6) The common SSB position QCL indication is the same as the cell list of the SSB position QCL (ssb-PositionQCL) on the NR carrier frequency layer with CCA

(7) The RMTC configuration indication of the NR carrier frequency layer with CCA is the same.

If the above conditions are not met, the measurement combination cannot be performed, and the NR measurement and the inter-system measurement of the E-UTRA frequency need to be configured for two measurements respectively. The network device can configure the UE to perform SSB-based measurements and report the measurement results.

FIG. 3 is a schematic diagram of UE measurement when a long-term evolution base station and a new radio base station are time synchronized according to an embodiment of the present application. Referring to Figure 3, for a UE residing in an NSA network, the figure shows a Long Term Evolution (LTE) measurement gap (measure gap), a synchronization signal block measurement timing configuration (SMTC), a new radio (NR) ) distribution of parameters in the time domain, such as the synchronization signal block (SSB) of the neighbor cell group (SCG) cell, and the synchronization signal block of the new wireless neighbor cell. Among them, the LTE base station and the NR base station are time synchronized, and the SSB of the NR SCG cell of the UE is synchronized with the SSB of the NR neighboring cell, and the time is the same. The LTE measurement interval is 40 milliseconds (ms) and the measurement duration is 6ms, and the SMTC period is 20ms and the measurement duration is 5ms. It can be seen from the figure that the LTE measurement overlaps the SSB of the NR SCG cell in the time domain, and the SMTC measurement overlaps the SSB of the NR adjacent cell in the time domain. The UE can measure the SSB of the NR adjacent cell, and then can Switch from NSA networking to SA networking.

FIG. 4 is a schematic diagram of UE measurement when a long-term evolution base station and a new radio base station are not time synchronized according to an embodiment of the present application. Similar to Fig. 3, for the UE residing in the NSA network, Fig. 4 shows another long-term evolution measurement interval, synchronization signal block measurement timing configuration, new radio synchronization signal block of neighboring cell group cells, neighboring cells. The distribution of parameters such as new radio synchronization signal blocks in the time domain. Among them, the LTE base station and the NR base station are not time synchronized, and the SSB of the NR SCG cell of the UE is not synchronized with the SSB of the NR neighboring cell, and the distribution is staggered in the time domain. The LTE measurement interval is 40 milliseconds (ms) and the measurement duration is 6ms, and the SMTC period is 20ms and the measurement duration is 5ms. It can be seen from the figure that the LTE measurement is staggered from the SSB of the NR SCG cell in the time domain, and the SMTC measurement is staggered from the SSB of the NR neighbor in the time domain. For UEs that do not support extended gap, the NR neighbor cannot be measured normally Area.

For the UE residing on the NSA network, as it moves from the NSA network environment to the SA network environment, the signal quality of the serving cell, the NR SCG cell, and the NR neighbor cell gradually changes. However, the UE may not be able to measure the NR neighbor cells normally and the SCG signal is continuously weakened, the communication rate of the UE will continue to decrease, and the user communication experience will be seriously affected. If the UE releases the SCG cell, the UE needs to disconnect the EN-DC and return to the LTE single mode. At this time, the UE needs to receive the B1 event measurement configuration sent by the network device, and can trigger the handover to the SA networking by extending the measurement interval and reporting the B1 event. However, the network device will not deliver the B1 event measurement configuration in every measurement configuration message. The UE may have to wait for a long time to receive the B1 event measurement configuration, which will cause the user to return to the SA network area after a period of time 5G SA networking.

To this end, an embodiment of the present application provides a communication method for switching between NSA networking and SA networking, so as to solve the above problem.

FIG. 5 is a schematic flowchart of a communication method provided by an embodiment of the present application. The communication method may be performed by a wireless communication device, and the wireless communication device may be an entire computer (for example, a terminal) of the computing device, or may be a part of the device in the computing device (for example, a communication chip or a system chip inside the terminal), The following is an introduction by taking a terminal (such as a user equipment) executing the communication method as an example. Referring to Figure 5, the method 500 includes:

S501: The user equipment receives a first measurement indication message from the first cell, where the first measurement indication message is used to instruct the user equipment to measure the first new radio cell.

S502: The user equipment receives a second measurement indication message from the second cell, where the second measurement indication message is used to instruct the user equipment to measure a second new radio cell, where the first new radio cell and the second new radio cell are the same community.

It should be understood that, when the UE resides in the first cell and the second cell, the network device may instruct the UE to measure the signal quality of neighboring cells through an air interface message, and specify the cell to be measured in the air interface message. The fact that the first NR cell and the second NR cell are the same cell can also be understood that the frequency of the first NR cell and the frequency of the second NR cell are located on the same frequency band.

S503: When the time of the first cell and the first new radio cell is not synchronized, the user equipment sends a measurement report message of the first new radio cell according to the measurement result of the second new radio cell.

It should be understood that when the time of the first cell and the first NR cell is not synchronized, the UE generally cannot obtain the SSB of the first NR cell by measuring the measurement interval of the LTE. The UE may configure the reporting of the measurement report as an event-triggered (event-triggered) report or a periodic (periodical) report according to the configuration of the network device. If the measurement on the first NR cell is configured as event-triggered reporting, the UE cannot measure the SSB of the first NR cell within a period of time, and the UE cannot report the measurement result of the first NR cell. The network device cannot acquire the signal quality of the first NR cell, nor instruct the UE to switch from the first cell to the first NR cell. However, since the first NR cell and the second NR cell are the same cell, and the corresponding measurement is the same frequency measurement, the UE can obtain the measurement result of the first NR cell through SMTC measurement, and will judge the first NR cell according to the measurement result of the second NR cell. Whether the measurement result of the NR cell meets the reporting event requirement, when the reporting event requirement is met, a measurement report message of the first NR cell may be sent.

Optionally, the method 500 further includes: one or more steps of S504, S505, and S506.

S504: Receive a second RRC connection reconfiguration message, where the second RRC reconfiguration message is used to instruct the UE to release the secondary cell group.

S505: In response to the second RRC connection reconfiguration message, release the secondary cell group;

S506: Receive a handover message, where the third RRC reconfiguration message is used to instruct the UE to handover to the first NR cell.

It should be understood that, after receiving the measurement report of the first NR cell, the network device may instruct the UE to switch from the first cell to the first NR cell when the measurement result of the first NR cell satisfies the handover condition.

It should be understood that, for the UE camped on the first cell and the second cell, when the network environment of the first cell and the second cell gradually moves to the first NR cell, it can be guaranteed that the UE camps on the first cell to the camp on the first NR cell. Smoothness of handover of the first NR cell.

To help understanding, a more detailed example is given below.

FIG. 6 is a schematic flowchart of a communication method for switching between a non-independent networking and an independent networking according to an embodiment of the present application. The communication method may be performed by a wireless communication device, and the wireless communication device may be an entire computer (for example, a terminal) of the computing device, or may be a part of the device in the computing device (for example, a communication chip or a system chip inside the terminal), The following is an introduction by taking the terminal executing the communication method as an example. Referring to Figure 6, the method 600 includes:

S601: The user equipment receives a first RRC connection reconfiguration message from a first cell, where the first RRC connection reconfiguration message is used to instruct the user equipment to measure the first new radio cell and report conditions according to the first event Report, the first event is B1 event or B2 event.

It should be understood that for a UE in EN-DC state, it is possible to camp on the first cell and the second cell. Here, it is exemplified that the first cell is an E-UTRA cell and the second cell is an NR cell. The network device of the first cell (eg, an LTE eNB) may configure a measurement event for the UE to trigger the measurement of the NR neighboring cell (eg, the first NR cell) by the terminal.

Specifically, the LTE eNB sends a first radio resource control (radio resource control, RRC) connection reconfiguration (RRCConnectionReconfiguration) message to the terminal, where the first RRC connection reconfiguration message includes a measurement configuration (measConfig) information element and a report configuration (ReportConfig) message ) cell, the measurement configuration cell carries a measurement object (MeasObjectNR) field, and the report configuration cell carries a report type (reportType) field and an event identification (event identification, eventID) field. The network device may specify the first NR cell to be measured specifically through the measurement object information. In addition, the UE can configure the reporting of the measurement report as an event-triggered report or a periodic report according to the configuration of the network device. The type of the event-triggered report can refer to 3GPP technical specifications (such as 3GPP TS38.331 V16.2.0), table 1 shows some examples of types of event-triggered reporting. Here, the reporting type corresponding to the first RRC connection reconfiguration message is event-triggered, and the event identifier is event B1 NR (eventB1-NR) and/or event B2 NR (eventB2-NR).

Table 1 Example of measurement event reporting

It should be understood that the UE determines the measurement object according to the measurement configuration in the first RRC connection reconfiguration message, and in the measurement result obtained by the terminal, if the corresponding measurement result meets the reporting standard, the measurement report of the corresponding NR cell will be reported. Wherein, optionally, the signal quality of the NR cell in this application can be based on reference signal receiving power (reference signal receiving power, RSRP), RSSI, reference signal receiving quality (reference signal receiving quality, RSRQ), signal-to-interference-noise ratio (signal-to-interference-noise ratio). to interference plus noise ratio, SINR) to determine one or more parameters.

S602: The user equipment receives a radio resource control reconfiguration message from the second cell, where the radio resource control reconfiguration message is used to instruct the user equipment to measure the second new radio cell, wherein the first new radio cell and the second NR The cell is the same cell.

It should be understood that, for the UE in the EN-DC state, the network device of the second cell (eg, the NR gNB) can configure a measurement event for the UE to trigger the measurement of the NR neighboring cell (eg, the second NR cell) by the terminal. The first NR cell and the second NR cell are the same cell, that is, the frequency points of the first NR cell and the second NR cell are in the same frequency band.

Specifically, the NR gNB sends an RRC reconfiguration (RRCReconfiguration) message to the UE, where the RRC reconfiguration message includes a measurement configuration (measConfig) information element and a reporting configuration (ReportConfig) information element, and the measurement configuration information element carries a measurement object (MeasObjectNR) field, the report configuration information element carries a report type (reportType) field and an event identification (event identification, eventID) field. The network device may specify the second NR cell to be measured specifically through the measurement object information. Here, the reporting type corresponding to the RRC reconfiguration message is event-triggered, and the event identity is identified as event A1 (eventA1), event A2 (eventA2), event A3 (eventA3), event A4 (eventA4), and event A5 (eventA5). one or more.

S603: When the time of the first cell and the first new radio cell are not synchronized, the user equipment sends a measurement report message of the first new radio cell according to the measurement result of the second new radio cell.

It should be understood that when the time of the first cell and the first NR cell are not synchronized, the UE cannot obtain the SSB of the first NR cell by measuring the LTE measurement interval, and the UE cannot report the measurement result of the first NR cell. The network device cannot acquire the signal quality of the first NR cell, nor instruct the UE to switch from the first cell to the first NR cell. However, since the first NR cell and the second NR cell are the same cell, and the corresponding measurement is intra-frequency measurement, the UE can obtain the measurement result of the second NR cell through SMTC measurement. The first NR cell and the second NR cell are the same cell, but the measurement method is different. The signal quality of the second NR cell is measured through SMTC by using the measurement command of the second cell, and the obtained measurement result can be used to evaluate the first NR cell. Signal quality of an NR cell. It is determined whether the measurement result of the first NR cell meets the event reporting requirement according to the measurement result of the second NR cell, and when the event reporting requirement is met, a measurement report message of the first NR cell may be sent.

S604: The user equipment receives a second radio resource control connection reconfiguration message, where the radio resource control connection reconfiguration message is used to instruct the user equipment to release the secondary cell group.

It should be understood that the NR configuration (nr-Config) information element in the second RRC connection reconfiguration message is set to indicate the release of the NR connection. For example, if the NR configuration information element is set to carry EN-DC release information, it is considered that the UE is instructed to release the SCG.

S605: The user equipment releases the secondary cell group in response to the second RRC connection reconfiguration message.

It should be understood that the UE releases the SCG and enters the LTE single connection state.

S606: The user equipment receives a handover message, where the handover message is used to instruct the user equipment to hand over to the first new radio cell.

It should be understood that, upon receiving the handover message, the UE switches from camping on the E-UTRA cell to camping on the first NR cell. The handover message may be an E-UTRA mobility command (MobilityFromE-UTRACommand) message, which may indicate that the cell to be camped on is the first NR cell. For example, indicated by the target radio access technology type (targetRAT-Type) information element

S607: The user equipment camps on the first new wireless cell.

It should be understood that the steps from S601 to S607 are optional, and may be all performed or partially performed.

It should be understood that when the LTE base station of the UE is not synchronized with the NR base station, the SSB of the second NR cell cannot be obtained by measuring the measurement interval indicated by the network device, and the measurement interval cannot be extended based on the time limit. In the SSB of the first NR cell, the UE will not report the measurement report information, and then the UE signal from the NSA networking environment to the SA networking environment will become worse and worse, or even disconnected from the network. In the networking environment, switch from the NSA networking to the SA networking as soon as possible to improve the communication rate and ensure smooth handover and user experience.

FIG. 7 is a schematic structural diagram of a wireless communication apparatus provided by an embodiment of the present application. The wireless communication apparatus may be a whole computer (for example, a terminal) of a computing device, or may be a part of a device in the computing device (for example, an internal terminal of a terminal) communication chip, system chip), the wireless communication device can be used for the communication device can be used to perform the communication method for switching between the non-independent networking and the independent networking provided by the embodiment of the present application, such as the communication related to FIG. 5 to FIG. 6 . The technical details and technical effects of the method 500 and the communication method 600, as well as various optional embodiments, may be described with reference to FIG. 5 to FIG. 6 . The wireless communication device 70 includes: a receiving unit 710 , a processing unit 720 and a sending unit 730 .

The receiving unit 710 is configured to receive a first measurement indication message from the first cell, where the first measurement indication message is used to instruct the user equipment UE to measure the first new wireless NR cell, and to receive the first measurement indication message from the second cell. Two measurement indication messages, where the second measurement indication message is used to instruct the UE to measure a second NR cell, where the first NR cell and the second NR cell are the same cell. The sending unit 730 is configured to send a measurement report message of the first NR cell according to the measurement result of the second NR cell when the time of the first cell and the first NR cell is not synchronized.

The receiving unit 710 is further configured to receive a second radio resource control connection reconfiguration message, where the radio resource control connection reconfiguration message is used to instruct the user equipment to release the secondary cell group. The processing unit 720 is configured to release the secondary cell group.

The receiving unit 710 is further configured to receive a handover message, where the handover message is used to instruct the user equipment to hand over to the first new radio cell. The processing unit 720 is configured to camp on the first NR cell.

It should be understood that the wireless communication device in this embodiment of the present application may be implemented by software, for example, a computer program or instruction having the above-mentioned functions, and the corresponding computer program or instruction may be stored in a memory inside the terminal, and read by a processor. The above-mentioned functions are realized by fetching the corresponding computer programs or instructions inside the memory. Alternatively, the wireless communication apparatus in the embodiments of the present application may also be implemented by hardware. The receiving unit 710 is a receiver, the processing unit 720 is a processor, and the sending unit 730 is a transmitter. The above-mentioned sending unit 730 and the receiving unit 710 of the terminal may be the same or different physical entities. When they are the same physical entity, they can be collectively referred to as transceiver units or transceivers. Alternatively, the wireless communication apparatus in this embodiment of the present application may also be implemented by a combination of a processor and a software module.

FIG. 8 is a schematic structural diagram of a wireless communication apparatus according to an embodiment of the present application. The wireless communication device may be a wireless communication device or a terminal in this embodiment of the present application, and may implement the wireless communication method shown in FIG. 3 or FIG. 8 and the above-mentioned optional embodiments. As shown in FIG. 8 , the wireless communication apparatus 80 includes: a processor 801 , and a memory 802 coupled with the processor 801 . It should be understood that although only one processor and one memory are shown in Figure 8 . Wireless communication device 801 may include other numbers of processors and memories.

The memory 802 is used for storing computer programs or computer instructions. These computer programs or instructions can be divided into two categories based on function. When one type of computer program or instruction is executed by the processor 801 , the wireless communication apparatus 80 implements the steps of the terminal in the wireless communication method of the embodiment of the present invention. Such computer programs or instructions may be referred to as terminal function programs. For example, the terminal function program may include program codes for implementing the wireless communication method shown in FIG. 3 .

In addition, the wireless communication device 80 may further include a connecting line 800, a transmitting circuit 803, a receiving circuit 804, an antenna 805, an input/output (I/O) interface 806, and the like. Among them, the transmitting circuit and the receiving circuit can be coupled to the antenna to wirelessly connect with other communication devices. The transmitting circuit and the receiving circuit can also be integrated into a transceiver, and the antenna can be a radio frequency antenna supporting multiple frequencies. The I/O interface provides the possibility to interact with other communication devices or users. For example, for a base station, the I/O interface may be a common public radio interface (common public radio interface, CPRI) interface, an Ethernet interface, a USB interface, and the like. For a terminal, the I/O interface can be a screen, a keyboard, a microphone, a speaker, a USB interface, and the like. Various components inside the wireless communication device 80 can be coupled together through various connecting lines (eg, a bus system), wherein the bus system can include a power bus, a control bus, a status signal bus, and the like in addition to a data bus. However, for the sake of clarity, the various buses are collectively referred to as bus systems in this document.

It can be understood that the above-mentioned processor 801 and memory 802 may be implemented by a processing unit and a storage unit instead, wherein the processing unit and the storage unit may be implemented by codes having corresponding functions. The storage unit is used to store program instructions; the processing unit is used to execute the program instructions in the storage unit, so as to implement the related wireless communication method shown in any of FIG. 5 to FIG. 6 and the above-mentioned optional embodiments.

FIG. 9 is a schematic structural diagram of a wireless communication apparatus according to an embodiment of the present application. The wireless communication device may be a wireless communication device or a terminal in this embodiment of the present application, and may implement the wireless communication method shown in FIG. 3 or FIG. 8 and the above-mentioned optional embodiments. As shown in FIG. 9 , the wireless communication apparatus 90 includes: a processor 901 , and an interface circuit 902 coupled with the processor 801 . It should be understood that although only one processor and one interface circuit are shown in FIG. 9 . Wireless communication apparatus 801 may include other numbers of processors and interface circuits.

Among them, the interface circuit 902 is used to communicate with other components of the terminal, such as memory or other processors. The processor 901 is used for signal interaction with other components through the interface circuit 902 . The interface circuit 902 may be an input/output interface of the processor 901 .

For example, the processor 901 reads computer programs or instructions in a memory coupled thereto through the interface circuit 902, and decodes and executes the computer programs or instructions. It should be understood that these computer programs or instructions may include the above-mentioned terminal function program, and may also include the above-mentioned function program applied to the wireless communication device in the terminal. When the corresponding functional program is decoded and executed by the processor 901, the terminal or the wireless communication device in the terminal can be made to implement the solution in the wireless communication method provided by the embodiments of this application.

Optionally, these terminal function programs are stored in a memory outside the wireless communication device 90 . When the above-mentioned terminal function program is decoded and executed by the processor 901, part or all of the above-mentioned terminal function program is temporarily stored in the memory.

Optionally, these terminal function programs are stored in a memory inside the wireless communication device 90 . When the terminal function program is stored in the memory inside the wireless communication device 90, the wireless communication device 90 can be provided in the terminal of the wireless communication system of the embodiment of the present invention.

Optionally, parts of the terminal function programs are stored in a memory outside the wireless communication device 90 , and other parts of the terminal function programs are stored in a memory inside the wireless communication device 90 .

It should be understood that the wireless communication apparatuses shown in any one of FIGS. 7 to 9 may be combined with each other, and the wireless communication apparatuses shown in any one of FIGS. 7 to 9 and the relevant design details of each optional embodiment may refer to each other, and may also refer to FIG. 5 or any of the wireless communication methods shown in FIG. 6 and related design details of each optional embodiment. It will not be repeated here.

The terms "first", "second", "third", "fourth" and the like in the embodiments and the accompanying drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence. Furthermore, the terms "comprising" and "having", and any variations thereof, are intended to mean non-exclusive inclusion, eg, the inclusion of a series of steps or elements. A method, system, product or device is not necessarily limited to those steps or elements literally listed, but may include other steps or elements not literally listed or inherent to the process, method, product or device.

It should be understood that, in this application, "at least one" refers to one or more, and "a plurality" refers to two or more. "And/or" is used to describe the relationship between related objects, indicating that there can be three kinds of relationships, for example, "A and/or B" can mean: only A, only B, and both A and B exist , where A and B can be singular or plural. The character "/" generally indicates that the associated objects are an "or" relationship. "At least one item(s) below" or similar expressions thereof refer to any combination of these items, including any combination of single item(s) or plural items(s). For example, at least one (a) of a, b or c, can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c" ", where a, b, c can be single or multiple.

It should be understood that, in this application, the size of the sequence numbers of the above-mentioned processes does not mean the sequence of execution, and the execution sequence of each process should be determined by its function and internal logic, and should not constitute any implementation process of the embodiments of the present application. limited. The word "coupling" mentioned in this application is used to express the intercommunication or interaction between different components, which may include direct connection or indirect connection through other components.

The above-mentioned embodiments of the present application may be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented in software, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, all or part of the processes or functions according to the embodiments of the present application are generated. The computer may be a general purpose computer, a special purpose computer, a computer network, or other programmable device. The computer instructions may be stored on or transmitted from one computer readable storage medium to another computer readable storage medium, for example, the computer instructions may be transmitted over a wire from a website site, computer, server or data center (eg coaxial cable, optical fiber, etc.) or wireless (eg infrared, radio, microwave, etc.) means to another website site, computer, server or data center. The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device such as a server, data center, etc. that includes one or more available media integrated. The available medium may be a magnetic medium, such as a floppy disk, a hard disk, and a magnetic tape; an optical medium, such as a DVD; or a semiconductor medium, such as a solid state disk (Solid State Disk, SSD), and the like.

In the embodiments of the present application, the memory refers to a device or circuit with data or information storage capability, and can provide instructions and data to the processor. Memory includes read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), non-volatile random access memory (NVRAM), programmable read-only memory or electrically erasable programmable memory, registers, etc.

The above are only specific embodiments of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art who is familiar with the technical scope disclosed in the present application can easily think of changes or substitutions. Covered within the scope of protection of this application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

A communication method, comprising:

receiving a first radio resource control RRC connection reconfiguration message from the first cell, where the first RRC connection reconfiguration message is used to instruct the user equipment UE to measure the first new radio NR cell;

receiving an RRC reconfiguration message from a second cell, where the RRC reconfiguration message is used to instruct the UE to measure a second NR cell, where the first NR cell and the second NR cell are the same cell;

When the time of the first cell and the first NR cell are not synchronized, a measurement report message of the first NR cell is sent according to the measurement result of the second NR cell.
The method of claim 1, further comprising:

receiving a second RRC connection reconfiguration message, where the second RRC connection reconfiguration is used to instruct the UE to release the secondary cell group;

release the secondary cell group;

A handover message is received, where the handover message is used to instruct the UE to hand over to the first NR cell.
The communication method according to claim 1 or 2, wherein the first RRC connection configuration message is further used to indicate that the reporting configuration of the first NR cell is a B1 event or a B2 event.
According to the communication method of claim 1 or 2, the first RRC connection reconfiguration message includes a measurement configuration information element and a reporting configuration information element, the measurement configuration information element carries measurement object information, and the measurement object information is the first NR cell , the reporting configuration information element carries event identification information, and the event identification information is a B1 event or a B2 event.
The communication method according to any one of claims 1 to 4, wherein the RRC reconfiguration message is used to instruct the UE to measure the reporting configuration of the second NR cell as A1 event, A2 event, A3 event, A4 event and A5 event one of the.
The communication method according to any one of claims 1 to 5, wherein the RRC reconfiguration message includes a measurement configuration information element and a reporting configuration information element, the measurement configuration information element carries measurement object information, and the measurement object information is the second NR cell, the reporting configuration information element carries event identification information, and the event identification information is one of A1 event, A2 event, A3 event, A4 event and A5 event.
The communication method according to any one of claims 1 to 6, wherein the first cell is an Evolved Universal Terrestrial Radio Access (E-UTRA) cell, and the second cell is an NR cell.
A communication device, comprising:

receiving unit and sending unit;

The receiving unit is configured to receive a first RRC connection reconfiguration message from the first cell, where the first RRC connection reconfiguration message is used to instruct the user equipment UE to measure the first new wireless NR cell;

The receiving unit is further configured to receive an RRC reconfiguration message from a second cell, where the RRC reconfiguration message is used to instruct the UE to measure a second NR cell, where the first NR cell and the second NR cell are the same cell ;

The sending unit is configured to send a measurement report message of the first NR cell according to the measurement result of the second NR cell when the time of the first cell and the first NR cell are not synchronized.
The communication device according to claim 8, wherein the method further comprises a processing unit;

The receiving unit is further configured to receive a second RRC connection reconfiguration message, where the second RRC connection reconfiguration is used to instruct the UE to release the secondary cell group;

the processing unit is configured to process the secondary cell group;

The receiving unit is further configured to receive a handover message, where the handover message is used to instruct the UE to handover to the first NR cell.
The communication device according to claim 7 or 8, wherein the first RRC connection configuration message is further used to indicate that the reporting configuration of the first NR cell is a B1 event or a B2 event.
According to the communication device according to claim 7 or 8, the first RRC connection reconfiguration message includes a measurement configuration information element and a reporting configuration information element, the measurement configuration information element carries measurement object information, and the measurement object information is the first NR cell , the reporting configuration information element carries event identification information, and the event identification information is a B1 event or a B2 event.
The communication device according to any one of claims 7 to 11, wherein the RRC reconfiguration message is used to instruct the UE to measure the reporting configuration of the second NR cell as A1 event, A2 event, A3 event, A4 event and A5 one of the events.
The communication method according to any one of claims 7 to 11, wherein the RRC reconfiguration message includes a measurement configuration information element and a reporting configuration information element, the measurement configuration information element carries measurement object information, and the measurement object information is the second NR cell, the reporting configuration information element carries event identification information, and the event identification information is one of A1 event, A2 event, A3 event, A4 event and A5 event.
The communication method according to any one of claims 7 to 13, wherein the first cell is an Evolved Universal Terrestrial Radio Access (E-UTRA) cell, and the second cell is an NR cell.
A computer-readable storage medium, characterized in that:

The computer-readable storage medium stores program codes, which, when executed by the terminal or a processor in the terminal, implement the method according to any one of claims 1 to 7 .
A computer program product, characterized in that:

When the program code contained in the computer program product is executed by the processor in the terminal, the method according to any one of claims 1 to 7 is implemented.
A communication system, comprising: a wireless network device, and a terminal including the wireless communication device according to any one of claims 8 to 14.
A terminal, characterized by comprising the wireless communication device according to any one of claims 8 to 14.