CN115226251A - Dual-connection data distribution method and device - Google Patents

Dual-connection data distribution method and device Download PDF

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Publication number
CN115226251A
CN115226251A CN202110412534.5A CN202110412534A CN115226251A CN 115226251 A CN115226251 A CN 115226251A CN 202110412534 A CN202110412534 A CN 202110412534A CN 115226251 A CN115226251 A CN 115226251A
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base station
data
terminal equipment
transmitted
rsrp
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鲜柯
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Chengdu TD Tech Ltd
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Chengdu TD Tech Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H04W76/16—Involving different core network technologies, e.g. a packet-switched [PS] bearer in combination with a circuit-switched [CS] bearer
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/18—Selecting a network or a communication service
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W48/00—Access restriction; Network selection; Access point selection
    • H04W48/20—Selecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
    • H04W88/02—Terminal devices
    • H04W88/06—Terminal devices adapted for operation in multiple networks or having at least two operational modes, e.g. multi-mode terminals

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  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Computer Security & Cryptography (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

The invention provides a data distribution method and a device of double connection.A base station of an anchor point acquires distribution parameters of terminal equipment, wherein the distribution parameters comprise any one of the following parameters: the method comprises the steps that channel quality, service scheduling priority, data volume to be transmitted, service time delay or TA are achieved, the terminal equipment supports double connection, first connection is established between the terminal equipment and an LTE base station, second connection is established between the terminal equipment and an NR base station, an anchor point base station determines a target base station used by the terminal equipment for data to be transmitted according to shunting parameters, the target base station is the LTE base station and/or the NR base station, and the anchor point base station indicates the terminal equipment and the core network equipment to send data or receive the target base station used by the data. When the anchor point base station determines to distribute the data to the LTE base station or the NR base station for transmission according to the distribution parameters, the positions or the service characteristics of the channel and the terminal equipment are considered, so that the transmission performance of the distributed service data can be ensured.

Description

Dual-connection data distribution method and device
Technical Field
The present application relates to the field of communications technologies, and in particular, to a Dual Connectivity (DC) offloading method and apparatus.
Background
In a dual connectivity architecture, a terminal device (e.g., a handset) may communicate using radio resources of at least two different base stations simultaneously in a connected state. A common scenario of dual connectivity is that a terminal device connects a base station of a New Radio (NR) system and a base station of a Long Term Evolution (LTE) system at the same time, where the NR system is also referred to as a 5G system, the base station of the NR system may be referred to as a gNB, and the base station of the LTE system is referred to as an evolved NodeB (eNB).
At present, a 5G system adopts two modes, namely, an independent networking (standard, abbreviated as SA) and a Non-independent networking (Non-standard, abbreviated as NSA), NAS is a scheme for transition from an LTE system to the 5G system, and a common NAS networking mode includes: the base station is an LTE base station and a 5G base station which coexist, and the core network adopts an LTE core network, or the base station is an LTE base station and a 5G base station which coexist, and the core network adopts a 5G core network. The NAS networking and the double-connection communication are combined to form an NSA-DC mode, data distribution between two base stations is carried out by an anchor point base station under the mode, the anchor point base station refers to a base station used by a terminal device access network, and the anchor point base station provides a signaling control function of a user access network and can provide user plane data forwarding.
Currently, the 5G protocol only explicitly supports simultaneous data transmission at the LTE base station and the 5G base station, but there is no requirement on how to allocate transmission rates at the LTE base station and the 5G base station, so that the transmission performance of the Service is affected, and the transmission performance of the Service includes delay and Quality of Service (QoS) performance.
Disclosure of Invention
The application provides a dual-connection shunting method and device, which can ensure the transmission performance of service data after shunting.
In a first aspect, the present application provides a dual-connection data offloading method, including:
the method comprises the following steps that an anchor point base station acquires a shunting parameter of terminal equipment, wherein the shunting parameter comprises any one of the following parameters: the method comprises the steps that channel quality, service scheduling priority, to-be-transmitted data volume, service delay or delay advance TA are adopted, the terminal equipment supports double connection, first connection is established between the terminal equipment and a Long Term Evolution (LTE) base station, second connection is established between the terminal equipment and a new air interface (NR) base station, and the anchor base station is the LTE base station or the NR base station;
the anchor point base station determines a target base station used by data to be transmitted of the terminal equipment according to the distribution parameters, wherein the target base station is the LTE base station and/or the NR base station;
the anchor base station indicates the target base station used by the terminal equipment for sending data or receiving data, and indicates the target base station used by the core network equipment for sending data or receiving data.
Optionally, when the offloading parameter is a channel quality, the channel quality includes any one of the following parameters: a reference signal received power, RSRP, signal to interference plus noise ratio, SINR, reference signal received quality, RSRQ, or received signal strength indication, RSSI;
the anchor point base station acquires the shunting parameters of the terminal equipment, and the method comprises the following steps:
and the anchor base station receives a first RSRP, a first SINR, a first RSRQ or a first RSSI under an LTE system and a second RSRP, a second SINR, a second RSRQ or a second RSSI under an NR system, which are reported by the terminal equipment.
Optionally, when the channel quality is RSRP, the determining, by the anchor base station, a target base station used by data to be transmitted of the terminal device according to the offloading parameter includes:
when the first RSRP and the second RSRP satisfy a first condition, determining that the LTE base station is a target base station used by the terminal device for data to be transmitted, where the first condition is: the first RSRP is larger than the RSRP upper limit value of an LTE system, and the second RSRP is smaller than the RSRP lower limit value of an NR system;
when the first RSRP and the second RSRP meet a second condition, determining that the NR base station is a target base station used by data to be transmitted of the terminal equipment, wherein the second condition is that: the first RSRP is smaller than the RSRP lower limit value of an LTE system, and the second RSRP is larger than the RSRP upper limit value of an NR system;
when the first RSRP and the second RSRP do not meet the first condition and the second condition, determining that the LTE base station or the NR base station is a target base station used by the terminal equipment for data to be transmitted.
Optionally, when the offloading parameter is a scheduling priority of a service, the determining, by the anchor point base station according to the offloading parameter, a target base station used by data to be transmitted of the terminal device includes:
when the scheduling priority of a service corresponding to the data to be transmitted of the terminal equipment is greater than or equal to a priority threshold, determining that the NR base station is a target base station used by the data to be transmitted of the terminal equipment;
and when the scheduling priority of the service corresponding to the data to be transmitted of the terminal equipment is smaller than the priority threshold, determining that the LTE base station is a target base station used by the data to be transmitted of the terminal equipment.
Optionally, when the offloading parameter is a data amount to be transmitted, the anchor base station obtains the offloading parameter of the terminal device, including:
the anchor base station periodically counts the data volume to be transmitted in the downlink of the terminal equipment on a Packet Data Convergence Protocol (PDCP) layer, and periodically counts the data volume to be transmitted in the uplink of a Buffer Status Report (BSR) reported by the terminal equipment;
the anchor point base station determines a target base station used by the data to be transmitted of the terminal equipment according to the distribution parameters, and the method comprises the following steps:
when the pre-configured resources of the base station can transmit all downlink data volume to be transmitted or uplink data volume to be transmitted of the terminal equipment, determining the pre-configured base station as a target base station used by the data to be transmitted of the terminal equipment, wherein the pre-configured base station is the LTE base station or the NR base station;
when the pre-configured resources of the base station cannot transmit all downlink data volume to be transmitted or uplink data volume to be transmitted of the terminal equipment, determining that the data to be transmitted of the terminal equipment is transmitted preferentially on the pre-configured resources of the base station, and transmitting the remaining data which is not transmitted on the resources of another base station.
Optionally, when the offloading parameter is a service, delaying, and acquiring, by the anchor base station, an offloading parameter of the terminal device includes:
the anchor base station periodically counts the average time delay of a downlink Packet Data Convergence Protocol (PDCP) buffer to obtain the downlink service time delay of the terminal equipment, and receives the average time delay of an uplink PDCP buffer periodically reported by the terminal equipment to obtain the uplink service time delay of the terminal equipment;
the anchor point base station determines a target base station used by the data to be transmitted of the terminal equipment according to the distribution parameters, and the method comprises the following steps:
when the downlink service time delay and/or the uplink service time delay of the terminal equipment are/is greater than or equal to a time delay threshold value, determining that the NR base station is a target base station used by data to be transmitted of the terminal equipment;
and when the downlink service delay and the uplink service delay of the terminal equipment are both smaller than the delay threshold, determining that the LTE base station is a target base station used by the data to be transmitted of the terminal equipment.
Optionally, when the offloading parameter is a delay advance TA, the acquiring, by the anchor base station, an offloading parameter of the terminal device includes:
the anchor base station calculates TA corresponding to the NR base station according to the SRS and the DMRS;
the anchor point base station determines a target base station used by the data to be transmitted of the terminal equipment according to the distribution parameters, and the method comprises the following steps:
when the TA corresponding to the NR base station is greater than or equal to a TA threshold value, determining that the LTE base station is a target base station used by data to be transmitted of the terminal equipment;
and when the TA corresponding to the NR base station is smaller than the TA threshold value, determining that the NR base station is a target base station used by the data to be transmitted of the terminal equipment.
The second aspect of the present invention provides a dual-connection data offloading device, including:
an obtaining module, configured to obtain a splitting parameter of a terminal device, where the splitting parameter includes any one of the following parameters: the method comprises the steps that channel quality, service scheduling priority, to-be-transmitted data volume, service delay or delay advance TA are adopted, the terminal equipment supports double connection, first connection is established between the terminal equipment and a Long Term Evolution (LTE) base station, second connection is established between the terminal equipment and a new air interface (NR) base station, and the anchor base station is the LTE base station or the NR base station;
a determining module, configured to determine, according to the offloading parameter, a target base station used by data to be transmitted of the terminal device, where the target base station is the LTE base station and/or the NR base station;
a sending module, configured to instruct the terminal device to send or receive data to use the target base station, and instruct a core network device to instruct the terminal device to send or receive data to use the target base station.
In a third aspect, the present invention provides a base station, including: at least one processor and memory;
the memory stores computer-executable instructions;
the at least one processor executing the computer-executable instructions stored by the memory causes the at least one processor to perform the method according to the first aspect of the invention.
In a fourth aspect, the present invention provides a computer readable storage medium having stored thereon computer executable instructions for performing the method according to the first aspect of the present invention when executed by a processor.
In a fifth aspect, the invention provides a computer program product comprising a computer program which, when executed by a processor, performs the method according to the first aspect of the invention.
In the dual-connection shunting method and device provided by the invention, the anchor point base station acquires shunting parameters of the terminal equipment, wherein the shunting parameters comprise any one of the following parameters: the method comprises the steps that channel quality, service scheduling priority, data volume to be transmitted, service time delay or TA (timing advance), the terminal equipment supports double connection, first connection is established between the terminal equipment and an LTE (Long term evolution) base station, second connection is established between the terminal equipment and an NR (noise-and-noise) base station, an anchor point base station determines a target base station used by the data to be transmitted of the terminal equipment according to a shunting parameter, the target base station is the LTE base station and/or the NR base station, and the anchor point base station indicates the terminal equipment and the core network equipment to send the data or receive the target base station used by the data. When the anchor point base station determines to distribute the data to the LTE base station or the NR base station for transmission according to the distribution parameters, the positions or the service characteristics of the channel and the terminal equipment are considered, so that the transmission performance of the distributed service data can be ensured.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.
FIG. 1 is a schematic diagram of option 3 networking in NSA EN-DC mode;
FIG. 2 is a schematic diagram of the networking of option 3x in NSA EN-DC mode;
FIG. 3 is a schematic diagram of option 4 networking in NSA NE-DC mode;
FIG. 4 is a schematic diagram of the networking of option 4a in NSA NE-DC mode;
fig. 5 is a flowchart of a data offloading method for dual connectivity according to an embodiment of the present invention;
fig. 6 is a flowchart of a dual-connection data offloading method according to a second embodiment of the present invention;
fig. 7 is a flowchart of a data offloading method for dual connectivity according to a third embodiment of the present invention;
fig. 8 is a flowchart of a data offloading method for dual connectivity according to a fourth embodiment of the present invention;
fig. 9 is a flowchart of a data offloading method for dual connectivity according to a fifth embodiment of the present invention;
fig. 10 is a flowchart of a data offloading method for dual connectivity according to a sixth embodiment of the present invention;
fig. 11 is a schematic structural diagram of a dual-connection data offloading device according to a seventh embodiment of the present invention;
fig. 12 is a schematic structural diagram of a base station according to an eighth embodiment of the present invention.
With the above figures, there are shown specific embodiments of the present application, which will be described in more detail below. These drawings and written description are not intended to limit the scope of the inventive concepts in any manner, but rather to illustrate the inventive concepts to those skilled in the art by reference to specific embodiments.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The implementations described in the following exemplary examples do not represent all implementations consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The invention provides a double-connection data distribution method which can be applied to double-connection communication under an NAS networking, the NAS networking and the double-connection communication are combined to form an NSA-DC mode, the NSA-DC mode comprises NSA EN-DC and NSA NE-DC, an anchor point base station in the NSA EN-DC mode is an LTE base station, a core network is an LTE base station, the anchor point base station in the NSA NE-DC mode is a 5G base station, and the core network is a 5G core network.
Fig. 1 is a schematic diagram of networking option (option) 3 in NSA EN-DC mode, and fig. 2 is a schematic diagram of networking option 3x in NSA EN-DC mode. Referring to fig. 1 and 2, the anchor base station in fig. 1 and 2 is an LTE base station, and the Core network employs an LTE Core network, which is also called an Evolved Packet Core (EPC for short).
The two networking modes are different in that: the anchor base stations differ in their functionality. In option 3, the NR base station cannot directly communicate with the EPC, and both Control Plane (CP) data and User Plane (UP) data need to be forwarded through the LTE base station, so the LTE base station may be considered as an LTE-advanced base station. The user plane is used for transmitting user specific service data, and the control plane is used for managing and scheduling signaling. User plane data are transmitted between the LTE base station and the EPC through an S1-U interface, and control plane data are transmitted between the LTE base station and the EPC through an S1-C interface. The NR base station and EPC in option 3x may perform user plane data transmission over the S1-U interface, but control plane data still needs to be transmitted over the LTE base station.
Fig. 3 is a schematic diagram of networking option 4 in the NSA NE-DC mode, and fig. 4 is a schematic diagram of networking option 4a in the NSA NE-DC mode. Referring to fig. 3 and 4, the anchor base station in fig. 3 and 4 is an NR base station, and the Core network is a 5G Core (NGC).
In option 3, the LTE base station cannot directly communicate with the NGC, and both control plane data and user plane data need to be forwarded through the NR base station. User plane data are transmitted between the NR base station and the NGC through an NG-U interface, and control plane data are transmitted between the NR base station and the NGC through an NG-C interface. In option 4a, the LTE base station and the NGC can perform user plane data transmission through the NG-U interface, but the control plane data still needs to be transmitted through the NR base station.
It should be understood that fig. 1 to fig. 4 only list some common networking manners, but the dual connectivity communication is not limited to the networking manners described above, and is not listed here.
The NR base station refers to a base station in an NR system, and may include an Access Point (AP) of a WiFi network, a next generation base station (which may be collectively referred to as a new generation radio access network node (NG-RAN node), where the next generation base station includes a new air interface base station (NR node b, gNB), a new generation evolved node b (NG-eNB), a Central Unit (CU), a Distributed Unit (DU), a gNB in a separate form, and the like), a new radio controller (NR controller), a radio remote module, a micro base station, a relay (relay), a transceiver point (TRP), a Transmission Point (TP), or other nodes.
The terminal device may be a cellular phone, a cordless phone, a Session Initiation Protocol (SIP) phone, a Wireless Local Loop (WLL) station, a Personal Digital Assistant (PDA), a handheld device with wireless communication function, a computing device or other processing device connected to a wireless modem, a vehicle-mounted device or a wearable device, a Virtual Reality (VR) terminal device, an Augmented Reality (AR) terminal device, a wireless terminal in industrial control (industrial control), a wireless terminal in unmanned driving (self), a wireless terminal in remote medical (remote medical), a wireless terminal in smart grid (smart grid), a wireless terminal in transport security (transport security), a wireless terminal in city (smart), a wireless terminal in smart home (smart), etc. The embodiments of the present application are not particularly limited.
The current 5G protocol only makes clear how to support simultaneous transmission of data of the terminal device at the LTE base station and the NR base station, but there is no requirement on how to allocate transmission rates at the LTE base station and the NR base station. Meanwhile, the coverage of the LTE base station is generally farther than that of the NR base station, and if the terminal device deployed at an edge position is allocated to the NR base station for transmission, the transmission performance of the service is also affected. Therefore, the present invention provides a dual-connection data offloading method, which provides for allocating service data of a terminal device between an LTE base station and an NR base station.
Fig. 5 is a flowchart of a data offloading method for dual connectivity according to an embodiment of the present invention, and as shown in fig. 5, the method provided in this embodiment includes the following steps:
s101, the anchor point base station acquires the shunting parameters of the terminal equipment, wherein the shunting parameters comprise any one of the following parameters: the terminal equipment supports double connection, the terminal equipment establishes a first connection with an LTE base station and establishes a second connection with an NR base station, and the anchor base station is the LTE base station or the NR base station.
The process of establishing dual connectivity between the terminal device and the LTE base station and the NR base station refers to the prior art, and is not described herein again. In this embodiment, the anchor base station may be an NR base station or an LTE base station, and the selection of the anchor base station varies according to different networking modes, where in the networking in the NSA EN-DC mode, the anchor base station is the LTE base station, and in the networking in the NSA NE-DC mode, the anchor base station is the NR base station.
The offloading parameter is used by the anchor base station to determine which base station or which connection of the data to be transmitted of the terminal device is transmitted, and may be any one of the following parameters: channel quality, scheduling priority of service, amount of data to be transmitted, service delay or delay Advance (TA for short).
The channel quality may comprise any of the following parameters: reference Signal Receiving Power (RSRP), signal to Interference plus Noise Ratio (SINR), reference Signal Receiving Quality (RSRQ), or Received Signal Strength Indication (RSSI).
And S102, the anchor point base station determines a target base station used by the data to be transmitted of the terminal equipment according to the distribution parameters, wherein the target base station is an LTE base station and/or an NR base station.
And the anchor point base station determines the connection or the base station used by the data to be transmitted according to the distribution parameters, wherein the connection and the base station are in one-to-one correspondence.
S103, the anchor base station indicates a target base station used by the terminal equipment for sending data or receiving data, and indicates a target base station used by the terminal equipment for sending data or receiving data of the core network equipment.
The offloading method of this embodiment is not only applicable to uplink transmission, but also applicable to downlink transmission, where during uplink transmission, the terminal device sends data to the target base station according to the target base station selected by the anchor base station, for example, the anchor base station determines to use the NR base station to transmit data, and then the terminal device sends the uplink data to the NR base station through the second connection according to the instruction of the anchor base station, and if the anchor base station determines to use the LTE base station to transmit data, then the terminal device sends the uplink data to the LTE base station through the first connection according to the instruction of the anchor base station. And after receiving the data sent by the terminal equipment, the NR base station and the LTE base station directly send the data to a core network or forward the data to the core network through the anchor point base station according to a networking mode.
For example, in the networking shown in fig. 1, the anchor base station is an LTE base station, the LTE base station receives data sent by the terminal device and sends the data to the EPC through an S1-U interface, the NR base station receives the data sent by the terminal device and forwards the data to the LTE base station, and the LTE base station sends the data to the EPC through an S1-U interface. In the networking shown in fig. 2, the anchor base station is an LTE base station, and after receiving data sent by the terminal device, the LTE base station and the NR base station respectively send the data to the EPC through S1-U interfaces.
During downlink transmission, after the anchor base station determines the target base station, the core network sends data to the terminal device through the target base station. The core network can directly send the data of the terminal equipment to the target base station according to the networking mode, and can also send the data of the terminal equipment to the target base station through the anchor point base station.
For example, in the networking shown in fig. 3, the anchor base station is an NR base station, the NGC sends data of the terminal device to the NR base station through an NG-U interface, if the anchor base station determines that the data is transmitted through the NR base station, the NGC sends the data to the terminal device through a second connection, if the anchor base station determines that the data is transmitted through the LTE base station, the data is forwarded to the LTE base station, and the LTE base station sends the data to the terminal device through a first connection. In the networking shown in fig. 4, the anchor base station is an NR base station, and if the anchor base station determines that data is transmitted through the NR base station, the NGC directly transmits the data to the NR base station through the NG-U interface, and the NR base station transmits the data to the terminal device through the second connection. And if the anchor base station determines that the data are transmitted through the LTE base station, the data are directly transmitted to the LTE base station through the NG-U interface, and the LTE base station transmits the data to the terminal equipment through the first connection.
In the method of this embodiment, the anchor base station obtains a offloading parameter of the terminal device, where the offloading parameter includes any one of the following parameters: the method comprises the steps that channel quality, service scheduling priority, data volume to be transmitted, service time delay or TA (timing advance), the terminal equipment supports double connection, first connection is established between the terminal equipment and an LTE (Long term evolution) base station, second connection is established between the terminal equipment and an NR (noise-and-noise) base station, an anchor point base station determines a target base station used by the data to be transmitted of the terminal equipment according to a shunting parameter, the target base station is the LTE base station and/or the NR base station, and the anchor point base station indicates the terminal equipment and the core network equipment to send the data or receive the target base station used by the data. When the anchor point base station determines to distribute the data to the LTE base station or the NR base station for transmission according to the distribution parameters, the positions or the service characteristics of the channel and the terminal equipment are considered, so that the transmission performance of the distributed service data can be ensured.
On the basis of the first embodiment, the second embodiment describes the offloading method by taking an offloading parameter as an example of channel quality, fig. 6 is a flowchart of a dual-connection data offloading method provided by the second embodiment of the present invention, and as shown in fig. 6, the method provided by the present embodiment includes the following steps.
S201, an anchor base station receives a first RSRP under an LTE system and a second RSRP under an NR system reported by a terminal device.
The terminal equipment periodically measures RSRP under an LTE system and an NR system and reports the measured value to the anchor base station, and the terminal equipment can measure the RSRP based on the configuration of the anchor base station.
The first RSRP in the LTE system may be understood as an RSRP in the LTE base station or an RSRP in the first connection measured by the terminal, and the first RSRP may reflect a channel quality of the first connection, and the second RSRP in the NR system may be understood as an RSRP in the NR base station or an RSRP in the second connection measured by the terminal, and the second RSRP may reflect a channel quality of the second connection.
S202, the anchor point base station determines a target base station used by the data to be transmitted of the terminal equipment according to the first RSRP and the second RSRP.
For example, when the first RSRP and the second RSRP satisfy a condition one, it is determined that the LTE base station is a target base station used by the terminal device for data to be transmitted, where the condition one is: the first RSRP is greater than the RSRP upper limit value of the LTE system, and the second RSRP is less than the RSRP lower limit value of the NR system.
When the first RSRP and the second RSRP meet a second condition, determining that the NR base station is a target base station used by data to be transmitted of the terminal equipment, wherein the second condition is that: the first RSRP is smaller than the RSRP lower limit value of the LTE system, and the second RSRP is larger than the RSRP upper limit value of the NR system.
When the first RSRP and the second RSRP do not meet the first condition and the second condition, the LTE base station or the NR base station is determined to be a target base station used by data to be transmitted of the terminal equipment.
The lower limit value of the RSRP of the LTE system, the upper limit value of the RSRP of the LTE system, the lower limit value of the RSRP of the NR system and the upper limit value of the RSRP of the NR system can be configured by the anchor base station, and the range of the values is (-50, -130) dB. The RSRP lower limit value of the LTE system is smaller than the RSRP upper limit value of the LTE system, and the RSRP lower limit value of the NR system is smaller than the RSRP upper limit value of the NR system. Illustratively, the default value of the RSRP lower limit value of the LTE system or the RSRP lower limit value of the NR system is-100dB, and the default value of the RSRP upper limit value of the LTE system or the RSRP upper limit value of the NR system is-90 dB.
When the first RSRP and the second RSRP do not satisfy the first condition and the second condition, the anchor base station may determine, according to other offloading parameters, a target base station used by the data to be transmitted, or the anchor base station may decide, according to its own policy, the target base station used by the data to be transmitted, or the anchor base station may randomly select an LTE base station or an NR base station for transmission, or the base station may configure in advance to use the LTE base station or the NR base station for transmission.
S203, the anchor base station instructs the terminal equipment to transmit data or receive data to use the target base station, and instructs the core network equipment to transmit data or receive data to use the target base station.
In this embodiment, the anchor base station receives a first RSRP in the LTE system and a second RSRP in the NR system reported by the terminal device, and determines, according to the first RSRP and the second RSRP, a target base station used by data to be transmitted of the terminal device. The anchor base station determines a target base station used by data to be transmitted of the terminal equipment according to the channel quality of the two base stations, and preferentially selects the base station with better channel quality to transmit the data, so that the transmission performance of the service can be ensured.
It should be noted that, when the channel quality is SINR, RSRQ, or RSSI, the anchor base station may also determine a target base station used by data to be transmitted of the terminal device by using a decision rule similar to RSRP, which is not described herein again.
Based on the first embodiment, a third embodiment takes an offloading parameter as an example of a scheduling priority of a service, and fig. 7 is a flowchart of a dual-connection data offloading method provided by the third embodiment of the present invention, as shown in fig. 7, the method provided by this embodiment includes the following steps.
S301, the anchor base station calculates the dispatching priority of the service of the terminal equipment.
For example, the anchor base station may calculate the scheduling priority of the service based on the signal quality, the QoS parameter, and the buffering delay of a Packet Data Convergence Protocol (PDCP) layer. For example only, the anchor base station may calculate the scheduling priority of the service based on any algorithm that exists. Wherein the scheduling priorities of different services may be different.
S302, when the scheduling priority of a service corresponding to data to be transmitted of the terminal equipment is greater than or equal to a priority threshold, determining that the NR base station is a target base station used by the data to be transmitted of the terminal equipment, and when the scheduling priority of the service is less than the priority threshold, determining that the LTE base station is the target base station used by the data to be transmitted of the terminal equipment.
S303, the anchor base station instructs the terminal device to transmit or receive data to or from the target base station, and instructs the core network device to transmit or receive data to or from the target base station.
In this embodiment, the anchor point base station calculates the scheduling priority of the service of the terminal device, and uses the NR base station to transmit data for the service with the high scheduling priority and uses the LTE base station to transmit data for the service with the low scheduling priority as the target base station used by the to-be-transmitted data of the terminal device according to the scheduling priority of the service of the terminal device, so as to ensure the delay and QoS performance of the service with the high scheduling priority.
On the basis of the first embodiment, the fourth embodiment describes the offloading method by taking an offloading parameter as a scheduling priority of a service as an example, and fig. 8 is a flowchart of a dual-connection data offloading method provided by the fourth embodiment of the present invention, as shown in fig. 8, the method provided by the present embodiment includes the following steps.
S401, the anchor point base station periodically counts the downlink data volume to be transmitted of the terminal equipment on a PDCP layer, and periodically counts the uplink data volume to be transmitted in the BSR reported by the terminal equipment.
In this embodiment, the corresponding data volume to be transmitted is respectively counted for downlink transmission and uplink transmission, and for downlink transmission, the base station shunts data on the PDCP layer, so that the anchor point base station counts the data volume sent to the terminal device in the PDCP buffer on the PDCP layer, and obtains the data volume to be transmitted in downlink of the terminal device. For uplink transmission, before transmitting data, a terminal device may send a Buffer Status Report (BSR) request transmission resource to a base station, and the base station allocates the transmission resource to the terminal device according to the BSR, so that an anchor base station may count an uplink to-be-transmitted amount based on the BSR sent by the terminal device. It can be understood that the anchor point base station may also obtain the uplink and downlink data amount to be transmitted of the terminal device by other manners.
S402, when the pre-configured resources of the base station can transmit all the downlink or uplink to-be-transmitted data volume of the terminal equipment, determining the pre-configured base station as a target base station used by the to-be-transmitted data of the terminal equipment, and when the pre-configured resources of the base station cannot transmit all the downlink or uplink to-be-transmitted data volume of the terminal equipment, determining that the to-be-transmitted data of the terminal equipment is transmitted on the pre-configured resources of the base station preferentially, and transmitting the rest un-transmitted data on the resources of the other base station.
The pre-configured base station is an LTE base station or an NR base station, and taking the pre-configured base station as an NR base station as an example, if the current resource of the NR base station can transmit all the data volume to be transmitted in downlink or uplink of the terminal device, the NR base station is used to transmit the data of the terminal device, and if the current resource of the NR base station cannot transmit all the data volume to be transmitted in downlink or uplink of the terminal device, it is determined that the NR base station is preferentially used to transmit the data of the terminal device, and the remaining data that is not transmitted is transmitted on the LTE base station.
Optionally, in a possible implementation manner, the uplink transmission and the downlink transmission may also be independently determined, and different base stations may be configured in advance for the uplink transmission and the downlink transmission.
S403, the anchor base station indicates a target base station used by the terminal equipment for sending data or receiving data, and indicates a target base station used by the terminal equipment for sending data or receiving data of the core network equipment.
In this embodiment, the anchor base station determines, according to the amount of data to be transmitted of the terminal device, to preferentially transmit the data to be transmitted of the terminal device on the resource of the base station configured in advance, and if the current transmission resource is insufficient, transmits the remaining data that is not transmitted on the resource of another base station, so that it can be ensured that the data of the terminal device is quickly transmitted, and the data transmission delay is reduced.
Based on the first embodiment, the fifth embodiment describes the offloading method by taking an offloading parameter as an example of service delay, fig. 9 is a flowchart of a dual-connection data offloading method provided in the fifth embodiment of the present invention, and as shown in fig. 9, the method provided in the present embodiment includes the following steps.
S501, the anchor point base station periodically counts the average time delay of the downlink PDCP cache to obtain the downlink service time delay of the terminal equipment, and receives the average time delay of the uplink PDCP cache periodically reported by the terminal equipment to obtain the uplink service time delay of the terminal equipment.
And for downlink transmission, the anchor point base station counts downlink service time delay, and for uplink transmission, the terminal equipment counts average time delay of the uplink PDCP cache and reports the average time delay to the anchor point base station.
S502, when the downlink service time delay and/or the uplink service time delay of the terminal equipment are/is larger than or equal to a time delay threshold value, determining the NR base station as a target base station used by the data to be transmitted of the terminal equipment, otherwise, determining the LTE base station as the target base station used by the data to be transmitted of the terminal equipment.
And if both the downlink service delay and the uplink service delay of the terminal equipment are less than the delay threshold, the data to be transmitted of the terminal equipment is determined to be transmitted by using the LTE base station. The delay threshold may be configured on the anchor base station according to service requirements, different services may be configured separately, and delay thresholds of different services may be different.
S503, the anchor base station instructs the terminal device to transmit or receive the target base station used by the data, and instructs the core network device terminal device to transmit or receive the target base station used by the data.
In this embodiment, the anchor point base station determines a target base station used for transmission according to the downlink service delay and the uplink service delay of the terminal device, and transmits the target base station by using the NR base station for the service whose downlink service delay or uplink service delay is greater than or equal to the delay threshold, and transmits the target base station by using the LTE base station for the service whose downlink service delay and uplink service delay are less than the delay threshold, where the transmission bandwidth and the transmission rate of the NR base station are generally greater than those of the LTE base station, and transmits the service with larger delay on the NR base station, so that the transmission delay of the service with larger delay can be reduced, and the transmission performance of the service is improved.
On the basis of the first embodiment, the sixth embodiment describes the offloading method by taking an offloading parameter as an example of service delay, fig. 10 is a flowchart of a dual-connection data offloading method provided in the sixth embodiment of the present invention, and as shown in fig. 10, the method provided in the present embodiment includes the following steps.
S601, the anchor base station calculates a TA corresponding to the NR base station according to a Sounding Reference Signal (SRS) and a demodulation Reference Signal (DMRS).
In order to ensure orthogonality of uplink transmissions and avoid intra-cell interference, the base station requires that signals from different terminal devices in the same subframe but in different frequency domain resources arrive at the base station substantially aligned in time. The base station can correctly decode the uplink data as long as receiving the uplink data sent by the terminal device within a Cyclic Prefix (CP) range, so that the time for the uplink synchronization to require signals from different terminal devices in the same subframe to reach the base station falls within the CP.
In order to ensure the time synchronization of the base station (as the receiving side), an uplink timing advance mechanism is proposed, and the timing advance is essentially a negative offset between the starting time of receiving the downlink subframe and the time of transmitting the uplink subframe when viewed from the terminal device side. The base station can control the arrival time of the uplink signals from different terminal apparatuses at the base station by appropriately controlling the offset of each terminal apparatus. For a terminal far away from the base station, due to a larger transmission delay, the terminal closer to the base station is required to transmit uplink data in advance, that is, the TA of the terminal farther away from the base station is larger, and the TA of the terminal closer to the base station is smaller.
And after the base station calculates the TA according to the SRS and the DMRS, the TA is sent to the terminal equipment, and the terminal equipment sends data according to the TA.
S602, when the TA corresponding to the NR base station is larger than or equal to the TA threshold, the LTE base station is determined to be the target base station used by the data to be transmitted of the terminal equipment, and when the TA corresponding to the NR base station is smaller than the TA threshold, the NR base station is determined to be the target base station used by the data to be transmitted of the terminal equipment.
The TA corresponding to the NR base station is a TA used when the terminal device transmits data to the NR base station, and the TAs used when the terminal device transmits data to different base stations are different. The TA value range is (0, 63), and the unit is 1696s, ts = 1s/(15000 × 2048), and the TA threshold value may be 40.
In this embodiment, the anchor base station estimates the distance from the terminal device to the NR base station according to the TA value, where a larger TA value of the terminal device indicates that the terminal device is farther from the NR base station. For terminal devices located at the edge of the coverage area of the NR base station, data transmission may fail due to weak or unstable signals, and the coverage area of the LTE base station is generally larger than that of the NR base station, so that the LTE base station is preferentially selected for data transmission for terminal devices farther from the NR base station, and reliability of data transmission is ensured. For terminal equipment closer to the NR base station, the NR base station can be adopted to transmit data, and the NR base station can reduce data transmission delay due to large bandwidth and high transmission rate, so that better experience is brought to users.
S603, the anchor base station indicates a target base station used by the terminal equipment for sending data or receiving data, and indicates a target base station used by the terminal equipment for sending data or receiving data of the core network equipment.
In this embodiment, the anchor base station calculates a TA corresponding to the NR base station, determines that the LTE base station is a target base station used by data to be transmitted of the terminal device when the TA corresponding to the NR base station is greater than or equal to a TA threshold, and determines that the NR base station is a target base station used by data to be transmitted of the terminal device when the TA corresponding to the NR base station is less than the TA threshold. The TA corresponding to the NR base station is larger than the TA threshold value, which indicates that the terminal equipment is far away from the NR base station, and the LTE base station with larger coverage area is selected for the terminal equipment to transmit, so that the reliability of data transmission can be ensured.
Fig. 11 is a schematic structural diagram of a dual-connection data offloading device according to a seventh embodiment of the present invention, and as shown in fig. 11, the device 100 of the present embodiment includes the following modules.
The acquisition module 1 is configured to acquire a distribution parameter of a terminal device, where the distribution parameter includes any one of the following parameters: the method comprises the steps that channel quality, service scheduling priority, to-be-transmitted data volume, service delay or delay advance TA are adopted, the terminal equipment supports double connection, first connection is established between the terminal equipment and a Long Term Evolution (LTE) base station, second connection is established between the terminal equipment and a new air interface (NR) base station, and the anchor base station is the LTE base station or the NR base station;
a determining module 12, configured to determine, according to the offloading parameter, a target base station used by data to be transmitted of the terminal device, where the target base station is the LTE base station and/or the NR base station;
a sending module 13, configured to instruct the terminal device to send or receive data to use the target base station, and instruct a core network device to instruct the terminal device to send or receive data to use the target base station.
Optionally, when the offloading parameter is a channel quality, the channel quality includes any one of the following parameters: reference signal received power, RSRP, signal to interference plus noise ratio, SINR, reference signal received quality, RSRQ, or received signal strength indication, RSSI. The obtaining module 11 is specifically configured to: and receiving a first RSRP, a first SINR, a first RSRQ or a first RSSI under an LTE system and a second RSRP, a second SINR, a second RSRQ or a second RSSI under an NR system, wherein the first RSRP, the first SINR, the first RSRQ or the first RSSI is reported by the terminal equipment.
Optionally, when the channel quality is RSRP, the determining module 12 is specifically configured to:
when the first RSRP and the second RSRP satisfy a first condition, determining that the LTE base station is a target base station used by the terminal device for data to be transmitted, where the first condition is: the first RSRP is larger than the RSRP upper limit value of an LTE system, and the second RSRP is smaller than the RSRP lower limit value of an NR system;
when the first RSRP and the second RSRP meet a second condition, determining that the NR base station is a target base station used by data to be transmitted of the terminal equipment, wherein the second condition is that: the first RSRP is smaller than the RSRP lower limit value of an LTE system, and the second RSRP is larger than the RSRP upper limit value of an NR system;
when the first RSRP and the second RSRP do not meet the first condition and the second condition, determining that the LTE base station or the NR base station is a target base station used by the terminal equipment for data to be transmitted.
Optionally, when the offloading parameter is a scheduling priority of a service, the determining module 12 is specifically configured to:
when the scheduling priority of a service corresponding to the data to be transmitted of the terminal equipment is greater than or equal to a priority threshold, determining that the NR base station is a target base station used by the data to be transmitted of the terminal equipment;
and when the scheduling priority of the service corresponding to the data to be transmitted of the terminal equipment is smaller than the priority threshold, determining that the LTE base station is a target base station used by the data to be transmitted of the terminal equipment.
Optionally, when the shunting parameter is a data volume to be transmitted, the obtaining module 11 is specifically configured to:
periodically counting the data volume to be transmitted in the downlink of the terminal equipment on a packet data convergence protocol PDCP layer, and periodically counting the data volume to be transmitted in the uplink of a buffer status report BSR reported by the terminal equipment;
the determining module 12 is specifically configured to:
when the pre-configured resources of the base station can transmit all downlink data volume to be transmitted or uplink data volume to be transmitted of the terminal equipment, determining the pre-configured base station as a target base station used by the data to be transmitted of the terminal equipment, wherein the pre-configured base station is the LTE base station or the NR base station;
when the pre-configured resources of the base station cannot transmit all downlink data volume to be transmitted or uplink data volume to be transmitted of the terminal equipment, determining that the data to be transmitted of the terminal equipment is transmitted preferentially on the pre-configured resources of the base station, and transmitting the remaining data which is not transmitted on the resources of another base station.
Optionally, when the offloading parameter is a service, the obtaining module 11 is specifically configured to:
periodically counting the average time delay of a downlink Packet Data Convergence Protocol (PDCP) buffer to obtain the downlink service time delay of the terminal equipment, and receiving the average time delay of an uplink PDCP buffer periodically reported by the terminal equipment to obtain the uplink service time delay of the terminal equipment;
the determining module 12 is specifically configured to:
when the downlink service time delay and/or the uplink service time delay of the terminal equipment are/is greater than or equal to a time delay threshold value, determining that the NR base station is a target base station used by data to be transmitted of the terminal equipment;
and when the downlink service time delay and the uplink service time delay of the terminal equipment are both smaller than the time delay threshold, determining that the LTE base station is a target base station used by the data to be transmitted of the terminal equipment.
Optionally, when the shunting parameter is a time delay advance TA, the obtaining module 11 is specifically configured to:
calculating a TA corresponding to the NR base station according to a channel Sounding Reference Signal (SRS) and a demodulation reference signal (DMRS);
the determining module 12 is specifically configured to:
when the TA corresponding to the NR base station is greater than or equal to a TA threshold value, determining that the LTE base station is a target base station used by data to be transmitted of the terminal equipment;
and when the TA corresponding to the NR base station is smaller than the TA threshold, determining that the NR base station is a target base station used by the data to be transmitted of the terminal equipment.
The apparatus of this embodiment may be configured to perform the method according to any one of the first to sixth embodiments, and the specific implementation manner and the technical effect are similar, which are not described herein again.
Fig. 12 is a schematic structural diagram of a base station according to an eighth embodiment of the present invention, and as shown in fig. 12, the base station 200 includes: a processor 21, a memory 22, and a transceiver 23, where the memory 22 is configured to store instructions, the transceiver 23 is configured to communicate with other devices, and the processor 21 is configured to execute the instructions stored in the memory, so that the base station 200 executes the method according to any one of the first to sixth embodiments, and specific implementation and technical effects are similar, and are not described herein again.
Ninth embodiment of the present invention provides a computer-readable storage medium, where a computer executing instruction is stored in the computer-readable storage medium, and the computer executing instruction is used for implementing the method according to any one of the first to fourth embodiments when being executed by a processor, and specific implementation manners and technical effects are similar, and are not described herein again.
An embodiment tenth of the present invention provides a computer program product, including a computer program, where when the computer program is executed by a processor, the method according to any one of the first to sixth embodiments is implemented, and specific implementation manners and technical effects are similar, and are not described herein again.
Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. The invention is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice in the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.
It will be understood that the present disclosure is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims (11)

1. A dual-connection data offloading method, comprising:
the method comprises the following steps that an anchor point base station acquires a shunting parameter of terminal equipment, wherein the shunting parameter comprises any one of the following parameters: the terminal equipment supports dual connection, the terminal equipment establishes a first connection with a Long Term Evolution (LTE) base station and establishes a second connection with a new air interface (NR) base station, and the anchor base station is the LTE base station or the NR base station;
the anchor point base station determines a target base station used by data to be transmitted of the terminal equipment according to the distribution parameters, wherein the target base station is the LTE base station and/or the NR base station;
the anchor base station indicates the target base station used by the terminal equipment for sending data or receiving data, and indicates the target base station used by the core network equipment for sending data or receiving data.
2. The method according to claim 1, wherein when the offloading parameter is channel quality, the channel quality includes any one of the following parameters: a reference signal received power, RSRP, signal to interference plus noise ratio, SINR, reference signal received quality, RSRQ, or received signal strength indication, RSSI;
the anchor point base station acquires the shunting parameters of the terminal equipment, and the method comprises the following steps:
and the anchor base station receives a first RSRP, a first SINR, a first RSRQ or a first RSSI under an LTE system and a second RSRP, a second SINR, a second RSRQ or a second RSSI under an NR system, which are reported by the terminal equipment.
3. The method of claim 2, wherein when the channel quality is RSRP, the determining, by the anchor base station, a target base station to be used by the terminal device for data transmission according to the offloading parameter comprises:
when the first RSRP and the second RSRP satisfy a first condition, determining that the LTE base station is a target base station used by the terminal device for data to be transmitted, where the first condition is: the first RSRP is larger than the RSRP upper limit value of an LTE system, and the second RSRP is smaller than the RSRP lower limit value of an NR system;
when the first RSRP and the second RSRP satisfy a second condition, determining that the NR base station is a target base station used by the terminal device for data to be transmitted, where the second condition is: the first RSRP is smaller than the RSRP lower limit value of an LTE system, and the second RSRP is larger than the RSRP upper limit value of an NR system;
when the first RSRP and the second RSRP do not meet the first condition and the second condition, determining that the LTE base station or the NR base station is a target base station used by the terminal equipment for data to be transmitted.
4. The method of claim 1, wherein when the offloading parameter is a scheduling priority of a service, the determining, by the anchor base station, a target base station used by data to be transmitted of the terminal device according to the offloading parameter comprises:
when the scheduling priority of a service corresponding to the data to be transmitted of the terminal equipment is greater than or equal to a priority threshold, determining that the NR base station is a target base station used by the data to be transmitted of the terminal equipment;
and when the scheduling priority of the service corresponding to the data to be transmitted of the terminal equipment is smaller than the priority threshold, determining that the LTE base station is a target base station used by the data to be transmitted of the terminal equipment.
5. The method of claim 1, wherein when the offloading parameter is a data amount to be transmitted, the acquiring, by the anchor base station, an offloading parameter of a terminal device includes:
the anchor point base station periodically counts the data volume to be transmitted in the downlink of the terminal equipment on a Packet Data Convergence Protocol (PDCP) layer, and periodically counts the data volume to be transmitted in the uplink of a Buffer Status Report (BSR) reported by the terminal equipment;
the anchor point base station determines a target base station used by the data to be transmitted of the terminal equipment according to the distribution parameters, and the method comprises the following steps:
when the pre-configured resources of the base station can transmit all downlink data volume to be transmitted or uplink data volume to be transmitted of the terminal equipment, determining the pre-configured base station as a target base station used by the data to be transmitted of the terminal equipment, wherein the pre-configured base station is the LTE base station or the NR base station;
when the pre-configured resources of the base station cannot transmit all downlink data volume to be transmitted or uplink data volume to be transmitted of the terminal equipment, determining that the data to be transmitted of the terminal equipment is transmitted preferentially on the pre-configured resources of the base station, and transmitting the remaining data which is not transmitted on the resources of another base station.
6. The method of claim 1, wherein when the offloading parameter is a service delay, the acquiring, by the anchor base station, an offloading parameter of a terminal device includes:
the anchor base station periodically counts the average time delay of a downlink Packet Data Convergence Protocol (PDCP) buffer to obtain the downlink service time delay of the terminal equipment, and receives the average time delay of an uplink PDCP buffer periodically reported by the terminal equipment to obtain the uplink service time delay of the terminal equipment;
the anchor point base station determines a target base station used by the data to be transmitted of the terminal equipment according to the distribution parameters, and the method comprises the following steps:
when the downlink service time delay and/or the uplink service time delay of the terminal equipment are/is greater than or equal to a time delay threshold value, determining that the NR base station is a target base station used by data to be transmitted of the terminal equipment;
and when the downlink service time delay and the uplink service time delay of the terminal equipment are both smaller than the time delay threshold, determining that the LTE base station is a target base station used by the data to be transmitted of the terminal equipment.
7. The method of claim 1, wherein when the offloading parameter is a delay advance (TA), the acquiring, by the anchor base station, an offloading parameter of a terminal device includes:
the anchor base station calculates TA corresponding to the NR base station according to the SRS and the DMRS;
the anchor point base station determines a target base station used by the data to be transmitted of the terminal equipment according to the distribution parameters, and the method comprises the following steps:
when the TA corresponding to the NR base station is greater than or equal to a TA threshold value, determining that the LTE base station is a target base station used by data to be transmitted of the terminal equipment;
and when the TA corresponding to the NR base station is smaller than the TA threshold, determining that the NR base station is a target base station used by the data to be transmitted of the terminal equipment.
8. A dual-connection data offloading device, comprising:
the acquisition module is configured to acquire a shunt parameter of the terminal device, where the shunt parameter includes any one of the following parameters: the method comprises the steps that channel quality, service scheduling priority, to-be-transmitted data volume, service delay or delay advance TA are adopted, the terminal equipment supports double connection, first connection is established between the terminal equipment and a Long Term Evolution (LTE) base station, second connection is established between the terminal equipment and a new air interface (NR) base station, and the anchor base station is the LTE base station or the NR base station;
a determining module, configured to determine, according to the offloading parameter, a target base station used by data to be transmitted of the terminal device, where the target base station is the LTE base station and/or the NR base station;
a sending module, configured to instruct the terminal device to send or receive data to use the target base station, and instruct a core network device to instruct the terminal device to send or receive data to use the target base station.
9. A base station, comprising: at least one processor and a memory;
the memory stores computer-executable instructions;
execution of the computer-executable instructions stored by the memory by the at least one processor causes the at least one processor to perform the method of any one of claims 1 to 7.
10. A computer-readable storage medium having computer-executable instructions stored thereon, which when executed by a processor, are configured to implement the method of any one of claims 1 to 7.
11. A computer program product comprising a computer program, characterized in that the computer program, when executed by a processor, implements the method of any one of claims 1 to 7.
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