CN112118605B - Uplink carrier configuration method, device and system - Google Patents

Uplink carrier configuration method, device and system Download PDF

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Publication number
CN112118605B
CN112118605B CN201910530405.9A CN201910530405A CN112118605B CN 112118605 B CN112118605 B CN 112118605B CN 201910530405 A CN201910530405 A CN 201910530405A CN 112118605 B CN112118605 B CN 112118605B
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base station
uplink
carrier
target
configuration
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CN112118605A (en
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许森
赵晔
刘桂清
何志强
祁峰
孙震强
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China Telecom Corp Ltd
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China Telecom Corp Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0083—Determination of parameters used for hand-off, e.g. generation or modification of neighbour cell lists
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/04—Wireless resource allocation
    • H04W72/044—Wireless resource allocation based on the type of the allocated resource
    • H04W72/0453—Resources in frequency domain, e.g. a carrier in FDMA
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network

Abstract

The invention discloses an uplink carrier configuration method, device and system. The uplink carrier configuration method comprises the following steps: a source base station acquires configuration information of a plurality of target side uplink supplementary carriers; the source base station sends measurement configuration to the terminal and obtains the measurement result of the terminal; under the condition that the source base station and the target base station support NR air interfaces, the source base station sends the measurement result to the target base station through the switching request message, so that the target base station determines the uplink carrier applicable to the terminal according to the measurement result; under the condition that a source base station and a target base station support an LTE air interface and a target auxiliary node base station supports an NR air interface, the source base station sends a measurement result to the target base station through a switching request message so that the target base station sends the measurement result to the target auxiliary node base station and the target auxiliary node base station determines an uplink carrier applicable to a terminal; and the source base station acquires the configuration information of the uplink carrier wave suitable for the terminal and sends the configuration information to the terminal so that the terminal can access the uplink supplementary carrier wave of the target side according to the configuration information.

Description

Uplink carrier configuration method, device and system
Technical Field
The present invention relates to the field of wireless communications, and in particular, to a method, an apparatus, and a system for configuring an uplink carrier.
Background
The 5G is used as a main technology of a next-generation wireless network and has the technical characteristics of supporting ultra wide band, large connection and the like. Aiming at the problem of insufficient coverage of the 5G Uplink, the Rel-15 standard introduces the concept of an Uplink Supplement (SUL) carrier, and the main idea is to use a carrier of a low frequency band as a supplement carrier of an NR high frequency band to solve the problem of insufficient coverage of the NR Uplink.
Disclosure of Invention
The inventor has recognized after analysis that the design mechanism of Rel-15 assumes the premise of co-coverage of LTE and NR. However, in practical deployments, the coverage and networking scenarios are relatively complex. When the handover is performed for the cell crossing the base station, the uplink coverage and the uplink use experience in the handover process can be effectively improved by synchronously selecting a proper uplink supplementary carrier. The following problems may result if a cross base station handover scheme of multiplexing SULs in Rel-15 is considered.
1) The configuration information of a plurality of SUL carriers of the target cell is lacked among the base stations. According to the current TS36.423/413 and TS38.413, 423 protocols, no SUL configuration information is transmitted during the X2/Xn setup and configuration update. Therefore, the source base station cannot know whether the target cell is configured with the uplink supplemental carrier, and cannot instruct the terminal to perform measurement.
2) The uplink and downlink of the target cell may not be in the same TAG (Timing Advance Group). After the terminal is switched, the uplink sending time cannot be deduced according to the downlink timing. Since there may be a case where a TA (Timing advance) difference is large, uplink transmission based on downlink estimation may cause interference to other uplink signals.
3) The configuration of only one uplink carrier is carried in X2/Xn. In addition, in the current switching process of the NSA (Non-stand alone networking) and SA (stand alone networking) scenarios, only one uplink supplementary carrier configuration and measurement result is supported by the base station, which cannot be applied to multiple uplink carrier scenarios.
To this end, the present invention provides a scheme for supporting multiple SUL carriers for uplink coverage enhancement.
According to a first aspect of some embodiments of the present invention, there is provided an uplink carrier configuration method, including: the method comprises the steps that a source base station acquires configuration information of a plurality of target side uplink supplementary carriers, wherein the uplink supplementary carriers adopt the frequency of LTE carriers; under the condition that the source base station and the target base station support NR air interfaces, the target base station supports uplink supplementary carriers; under the condition that the source base station and the target base station support an LTE air interface and the target auxiliary node base station supports an NR air interface, the target auxiliary node base station supports an uplink supplementary carrier at the target side; the source base station sends measurement configuration to the terminal according to the configuration information so that the terminal can measure the downlink carrier corresponding to the uplink supplementary carrier of the target side according to the measurement configuration; a source base station acquires a measurement result of a terminal; under the condition that the source base station and the target base station support NR air interfaces, the source base station sends a measurement result to the target base station through a switching request message so that the target base station can determine an uplink carrier suitable for the terminal according to the measurement result; under the condition that the source base station and the target base station support an LTE air interface and the target auxiliary node base station supports an NR air interface, the source base station sends the measurement result to the target base station through the switching request message so that the target base station sends the measurement result to the target auxiliary node base station and the target auxiliary node base station determines an uplink carrier applicable to the terminal; the source base station acquires the configuration information of the uplink carrier wave which is sent by the target base station through the switching response message and is suitable for the terminal; and the source base station sends the configuration information of the uplink carrier suitable for the terminal to the terminal so that the terminal can access the uplink supplementary carrier of the target side according to the configuration information.
In some embodiments, the source base station and the target base station support only SA, or both SA and NSA, and support NR air interface; the source base station acquires configuration information of a plurality of target side uplink supplementary carriers supported by the target base station.
In some embodiments, when a direct interface exists between a source base station and a target base station, the source base station obtains configuration information of a plurality of target side uplink supplementary carriers supported by the target base station, which is sent by the target base station, through an Xn setting request or a gNB configuration update message, so that the source base station sends configuration information of a plurality of source side uplink supplementary carriers supported by the source base station to the target base station through an Xn setting confirmation or a gNB configuration update confirmation message; when no direct interface exists between the source base station and the target base station, the source base station configures the transmission message through the radio access network relayed by the AMF, and acquires the configuration information of the plurality of uplink supplementary carriers supported by the target base station, so that the source base station configures the transmission message through the radio access network relayed by the AMF, and transmits the configuration information of the plurality of source side uplink supplementary carriers supported by the source base station to the target base station.
In some embodiments, the measurement configuration further includes a measurement configuration of a preset downlink carrier, and the measurement result further includes a measurement result of the terminal on the preset downlink carrier, where the preset downlink carrier supports the frequency of the NR carrier; the uplink carrier configuration method further comprises the following steps: under the condition that the measurement result of the downlink preset carrier is higher than a preset threshold, the target base station determines the uplink preset carrier adopting the frequency of the NR carrier as the uplink carrier suitable for the terminal; under the condition that the measurement result of the downlink preset carrier is not higher than a preset threshold, if the measurement result comprises the measurement result of the downlink carrier corresponding to the uplink supplementary carrier, the target base station determines the uplink supplementary carrier with the optimal measurement result as the uplink carrier suitable for the terminal; and if the measurement result does not include the measurement result of the downlink carrier corresponding to the uplink supplementary carrier, the target base station determines the uplink supplementary carrier currently used by the terminal as the uplink carrier applicable to the terminal.
In some embodiments, the source base station and the target base station are base stations supporting LTE air interfaces; the target secondary node base station supports an NR air interface and only supports NSA or supports SA and NSA at the same time; and the source base station acquires the configuration information of a plurality of target side uplink supplementary carriers supported by the target auxiliary node base station through the target base station.
In some embodiments, when there is a direct interface between the source base station and the target base station, the source base station sets, through X2, a request or eNB configuration update message, and acquires configuration information of multiple uplink supplementary carriers supported by the target secondary node base station, which is sent by the target base station, so that the source base station sets, through X2, an acknowledgement or eNB configuration update confirmation message, and sends, to the target base station, configuration information of multiple source-side uplink supplementary carriers supported by a 5G neighboring cell of the source base station; when no direct interface exists between the source base station and the target base station, the source base station configures a transmission message through a radio access network uplink relayed by the MME, and acquires configuration information of a plurality of uplink supplementary carriers supported by the target auxiliary node base station, which is sent by the target base station, so that the source base station configures the transmission message through the radio access network downlink relayed by the MME, and sends configuration information of a plurality of source side uplink supplementary carriers supported by a 5G neighbor cell of the source base station to the target base station.
In some embodiments, the uplink carrier configuration method further includes: and the target auxiliary node base station sends the configuration information of the plurality of uplink supplementary carriers supported by the target auxiliary node base station to the target base station through an EN-DC X2 setting request or an EN-DC gNB configuration updating message.
In some embodiments, the uplink carrier configuration method further includes: and the target auxiliary node base station acquires the configuration information of the plurality of uplink supplementary carriers supported by the adjacent cell of the target base station sent by the target base station through an EN-DC X2 setting request confirmation or an EN-DC gNB configuration updating confirmation message.
In some embodiments, the measurement configuration further includes a measurement configuration of a preset downlink carrier, and the measurement result further includes a measurement result of the terminal on the preset downlink carrier, where the preset downlink carrier supports the frequency of the NR carrier; the uplink carrier configuration method further comprises the following steps: the target auxiliary node base station acquires a measurement result sent by the target base station through the SgNB addition request; under the condition that the measurement result of the downlink preset carrier is higher than a preset threshold, the target auxiliary node base station determines the uplink preset carrier adopting the frequency of the NR carrier as the uplink carrier suitable for the terminal; under the condition that the measurement result of the downlink preset carrier is not higher than a preset threshold, if the measurement result comprises the measurement result of the downlink carrier corresponding to the uplink supplementary carrier, the target auxiliary node base station determines the uplink supplementary carrier with the optimal measurement result as the uplink carrier applicable to the terminal; if the measurement result does not include the measurement result of the downlink carrier corresponding to the uplink supplementary carrier, the target auxiliary node base station determines the uplink supplementary carrier currently used by the terminal as the uplink carrier applicable to the terminal; and the target auxiliary node base station sends the configuration information of the uplink carrier wave suitable for the terminal to the target base station through the SgNB addition response message.
In some embodiments, the sending, by the source base station, the measurement configuration to the terminal according to the configuration information includes: the source base station determines a set of uplink supplementary carriers available for the terminal as a set of alternative uplink carriers according to the configuration information and the PLMN supported by the terminal; the source base station generates measurement configuration of each uplink supplementary carrier in the alternative uplink carrier set; and the source base station sends the measurement configuration to the terminal so that the terminal can measure the uplink supplementary carrier waves of the target side according to the measurement configuration.
In some embodiments, the source base station determines the measurement configuration according to the system of the downlink carrier corresponding to each uplink supplementary carrier in the candidate uplink carrier set.
In some embodiments, the source base station sends the measurement configuration to the terminal through an RRC connection reconfiguration message according to the configuration information.
In some embodiments, the source base station sends the configuration information of the uplink carrier to which the terminal is applicable to the terminal through an RRC connection reconfiguration message.
In some embodiments, the uplink carrier configuration method further includes: the terminal acquires the configuration information of the uplink carrier wave which is sent by the source base station and is suitable for the terminal through the RRC connection reconfiguration message; the terminal deletes the HARQ cache and stops the uplink timer used by the terminal currently; and the terminal is accessed to the target base station or the auxiliary node base station of the target base station.
In some embodiments, the measurement configuration includes at least one of a measurement identifier, a measured downlink frequency point, a measurement event, a measurement report reporting manner, a measurement event parameter configuration set, and a measurement PCI set.
In some embodiments, the configuration information of the uplink carrier to which the terminal is applicable includes at least one of frequency point information of the uplink carrier, a subcarrier interval of the uplink carrier, an identifier of the uplink carrier, RACH configuration information of the uplink carrier, configuration information of an uplink PUSCH, configuration information of an uplink PUCCH, configuration information of an uplink SRS, and a TA offset.
According to a second aspect of the embodiments, an uplink carrier configuration apparatus is provided, which is located at a source base station, and includes: the carrier information interaction module is configured to acquire configuration information of a plurality of target side uplink supplementary carriers, wherein the uplink supplementary carriers adopt the frequency of LTE carriers; under the condition that the source base station and the target base station support NR air interfaces, the target base station supports uplink supplementary carriers; under the condition that the source base station and the target base station support an LTE air interface and the target auxiliary node base station supports an NR air interface, the target auxiliary node base station supports a target side uplink supplementary carrier; the measurement configuration module is configured to send measurement configuration to the terminal according to the configuration information so that the terminal can measure a downlink carrier corresponding to the uplink supplementary carrier of the target side according to the measurement configuration; a measurement result acquisition module configured to acquire a measurement result of the terminal; the measurement result sending module is configured to send the measurement result to the target base station through the handover request message under the condition that the source base station and the target base station support the NR air interface, so that the target base station determines the uplink carrier applicable to the terminal according to the measurement result; or, under the condition that the source base station and the target base station support an LTE air interface and the target auxiliary node base station supports an NR air interface, sending the measurement result to the target base station through the handover request message, so that the target base station sends the measurement result to the target auxiliary node base station and the target auxiliary node base station determines an uplink carrier applicable to the terminal; the configuration information acquisition module is configured to acquire the configuration information of the uplink carrier wave which is sent by the target base station through the switching response message and is applicable to the terminal; and the configuration information sending module is configured to send the configuration information of the uplink carrier suitable for the terminal to the terminal so that the terminal can access the uplink supplementary carrier of the target side according to the configuration information.
In some embodiments, the source base station and the target base station support only SA, or both SA and NSA, and support NR air interface; the carrier information interaction module is further configured to acquire configuration information of a plurality of target side uplink supplementary carriers supported by the target base station.
In some embodiments, the carrier information interaction module is further configured to: when a direct interface exists between a source base station and a target base station, acquiring configuration information of a plurality of target side uplink supplementary carriers supported by the target base station, which is sent by the target base station, through an Xn setting request or a gNB configuration update message; setting confirmation or gNB configuration update confirmation information through Xn, and sending configuration information of a plurality of source side uplink supplementary carriers supported by a source base station to a target base station; when a direct interface does not exist between a source base station and a target base station, acquiring configuration information of a plurality of uplink supplementary carriers supported by the target base station, which is sent by the target base station, through an uplink configuration transmission message of a wireless access network transferred by an AMF; and transmitting configuration information of a plurality of source side uplink supplementary carriers supported by the source base station to the target base station through the radio access network downlink configuration transmission message relayed by the AMF.
In some embodiments, the source base station and the target base station are base stations supporting LTE air interfaces; the target auxiliary node base station supports an NR air interface and only supports NSA or simultaneously supports SA and NSA; the carrier information interaction module is further configured to acquire, through the target base station, configuration information of a plurality of target side uplink supplementary carriers supported by the target secondary node base station.
In some embodiments, the carrier information interaction module is further configured to: when a direct interface exists between a source base station and a target base station, setting a request or an eNB configuration updating message through X2, and acquiring configuration information of a plurality of uplink supplementary carriers supported by a target auxiliary node base station, wherein the configuration information is sent by the target base station; setting confirmation or eNB configuration updating confirmation information through the X2, and sending configuration information of a plurality of source side uplink supplementary carriers supported by the 5G adjacent cell of the source base station to the target base station; when a direct interface does not exist between a source base station and a target base station, acquiring configuration information of a plurality of uplink supplementary carriers supported by a target auxiliary node base station, which is sent by the target base station, through a wireless access network uplink configuration transmission message transferred by an MME; and sending configuration information of a plurality of source side uplink supplementary carriers supported by the 5G neighboring area of the source base station to the target base station through the radio access network downlink configuration transmission message transferred by the MME.
In some embodiments, the measurement configuration module is further configured to determine, according to the configuration information and PLMNs supported by the terminal, a set of uplink supplemental carriers available to the terminal as an alternative set of uplink carriers; generating measurement configuration of each uplink supplementary carrier in the alternative uplink carrier set; and sending the measurement configuration to the terminal so that the terminal can measure the uplink supplementary carrier waves of the target side according to the measurement configuration.
In some embodiments, the measurement configuration module is further configured to determine the measurement configuration according to a system of a downlink carrier corresponding to each uplink supplementary carrier in the candidate uplink carrier set.
In some embodiments, the measurement configuration module is further configured to send the measurement configuration to the terminal through an RRC connection reconfiguration message according to the configuration information.
In some embodiments, the configuration information sending module is further configured to send the configuration information of the uplink carrier to which the terminal is applicable to the terminal through an RRC connection reconfiguration message.
In some embodiments, the measurement configuration includes at least one of a measurement identifier, a measured downlink frequency point, a measurement event, a measurement report reporting manner, a measurement event parameter configuration set, and a measurement PCI set.
In some embodiments, the configuration information of the uplink carrier to which the terminal is applicable includes at least one of frequency point information of the uplink carrier, a subcarrier interval of the uplink carrier, an identifier of the uplink carrier, RACH configuration information of the uplink carrier, configuration information of an uplink PUSCH, configuration information of an uplink PUCCH, configuration information of an uplink SRS, and a TA offset.
According to a third aspect of some embodiments of the present invention, there is provided an uplink carrier configuration system, including: the source base station comprises any one of the uplink carrier configuration devices; the target base station is configured to determine an uplink carrier applicable to the terminal according to a measurement result sent by the source base station under the condition of supporting an NR air interface; or, in the case of supporting an LTE air interface, the ue is configured to send the measurement result sent by the source base station to the target secondary node base station supporting an NR air interface, so that the target secondary node base station determines, according to the measurement result, the uplink carrier applicable to the terminal.
In some embodiments, the measurement configuration further includes a measurement configuration of a preset downlink carrier, and the measurement result further includes a measurement result of the terminal on the preset downlink carrier, where the preset downlink carrier supports the frequency of the NR carrier; in the case that the source base station and the target base station support only SA or both SA and NSA and support an NR air interface, the target base station is further configured to: determining the uplink preset carrier wave adopting the frequency of the NR carrier wave as the uplink carrier wave applicable to the terminal under the condition that the measurement result of the downlink preset carrier wave is higher than a preset threshold; under the condition that the measurement result of the downlink preset carrier is not higher than a preset threshold, if the measurement result comprises the measurement result of the downlink carrier corresponding to the uplink supplementary carrier, determining the uplink supplementary carrier with the optimal measurement result as the uplink carrier suitable for the terminal; and if the measurement result does not include the measurement result of the downlink carrier corresponding to the uplink supplementary carrier, determining the uplink supplementary carrier currently used by the terminal as the uplink carrier applicable to the terminal.
In some embodiments, the source base station and the target base station are base stations supporting LTE air interfaces; the target secondary node base station supports an NR air interface and only supports NSA or supports SA and NSA at the same time; the uplink carrier configuration system further comprises: the target secondary node base station is configured to send configuration information of a plurality of uplink supplementary carriers supported by the target secondary node base station to the target base station through an EN-DC X2 setting request or an EN-DC gNB configuration updating message; and acquiring configuration information of a plurality of uplink supplementary carriers supported by the neighboring cell of the target base station, which is sent by the target base station, through an EN-DC X2 setting request confirmation or an EN-DC gNB configuration updating confirmation message.
In some embodiments, the measurement configuration further includes a measurement configuration of a preset downlink carrier, and the measurement result further includes a measurement result of the terminal on the preset downlink carrier, where the preset downlink carrier supports the frequency of the NR carrier; the target secondary node base station is further configured to: obtaining a measurement result sent by a target base station through an SgNB addition request; determining the uplink preset carrier wave adopting the frequency of the NR carrier wave as the uplink carrier wave suitable for the terminal under the condition that the measurement result of the downlink preset carrier wave is higher than a preset threshold; under the condition that the measurement result of the downlink preset carrier is not higher than a preset threshold, if the measurement result comprises the measurement result of the downlink carrier corresponding to the uplink supplementary carrier, determining the uplink supplementary carrier with the optimal measurement result as the uplink carrier suitable for the terminal; if the measurement result does not include the measurement result of the downlink carrier corresponding to the uplink supplementary carrier, determining the uplink supplementary carrier currently used by the terminal as the uplink carrier suitable for the terminal; and sending the configuration information of the uplink carrier wave suitable for the terminal to the target base station through the switching response message.
Some embodiments of the above invention have the following advantages or benefits: the embodiment of the invention can ensure that the terminal can be effectively accessed to the uplink supplementary carrier wave of the target side in the switching process when a plurality of LTE carrier waves exist in one NR coverage area. Therefore, a non-co-sited deployment scenario can also support multiple uplink supplementary carriers. The embodiment has small influence on the terminal, has good backward compatibility and deployment possibility, and is enhanced based on the existing protocol, so the method is easy to implement.
Other features of the present invention and advantages thereof will become apparent from the following detailed description of exemplary embodiments thereof, which proceeds with reference to the accompanying drawings.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a flowchart illustrating an uplink carrier configuration method according to some embodiments of the present invention.
Fig. 2 is a flowchart illustrating an uplink carrier configuration method in an SA scenario according to some embodiments of the present invention.
Fig. 3 is a signaling flow diagram in an SA scenario according to some embodiments of the invention.
Fig. 4 is a flowchart illustrating an uplink carrier configuration method in an NSA scenario according to some embodiments of the present invention.
Fig. 5 is a signaling flow diagram in an NSA scenario, according to some embodiments of the invention.
Fig. 6 is a schematic structural diagram of an uplink carrier configuration apparatus according to some embodiments of the present invention.
Fig. 7 is a schematic structural diagram of an uplink carrier configuration system according to some embodiments of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The relative arrangement of the components and steps, the numerical expressions and numerical values set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.
Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description.
Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate.
In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.
Fig. 1 is a flowchart illustrating an uplink carrier configuration method according to some embodiments of the present invention. As shown in fig. 1, the uplink carrier configuration method of this embodiment includes steps S102 to S112.
In step S102, the source base station obtains configuration information of a plurality of target-side uplink supplementary carriers, where the uplink supplementary carriers adopt frequencies of LTE carriers.
And the NR base station at the target side supports the uplink supplementary carrier at the target side. In an SA scene, a source base station and a target base station support an NR air interface, and the target base station supports an uplink supplementary carrier; in an NSA scene, a source base station and a target base station support an LTE air interface, a target auxiliary node base station supports an NR air interface, and the target auxiliary node base station supports a target side uplink supplementary carrier.
In step S104, the source base station sends a measurement configuration to the terminal according to the configuration information, so that the terminal measures a downlink carrier corresponding to the target side uplink supplemental carrier according to the measurement configuration.
The measurement configuration includes measurement configuration of a downlink carrier corresponding to the target side uplink supplementary carrier, and may further include measurement configuration of a preset downlink carrier. And presetting the frequency of the NR carrier adopted by the downlink carrier.
In some embodiments, the measurement configuration includes at least one of a measurement Identifier, a measured downlink frequency point, a measurement event, a measurement report reporting manner, a measurement event parameter configuration set, and a measurement PCI (Physical Cell Identifier) set. The measurement PCI set includes a PCI list of downlink carriers to be measured, and the terminal may report a measurement result corresponding to one or more PCIs in the PCI list.
In step S106, the source base station acquires a measurement result of the terminal.
In some embodiments, the measurement result includes a measurement result of a downlink carrier corresponding to the target side uplink supplementary carrier, and may further include a measurement result of a preset downlink carrier.
In step S108, the source base station sends the measurement result to the target base station through the handover request message, so that the target base station or the target secondary node base station determines the uplink carrier applicable to the terminal according to the measurement result.
Under the condition that the source base station and the target base station support NR air interfaces, the source base station sends the measurement result to the target base station through the switching request message, so that the target base station determines the uplink carrier applicable to the terminal according to the measurement result;
under the condition that the source base station and the target base station support an LTE air interface and the target auxiliary node base station supports an NR air interface, the source base station sends the measurement result to the target base station through the switching request message so that the target base station sends the measurement result to the target auxiliary node base station and the target auxiliary node base station determines an uplink carrier wave applicable to the terminal;
in step S110, the source base station acquires configuration information of an uplink carrier to which the terminal is applicable, which is transmitted by the target base station.
In some embodiments, the configuration information of the Uplink carrier applicable to the terminal includes at least one of frequency point information of the Uplink carrier, a subcarrier interval of the Uplink carrier, an identifier of the Uplink carrier, RACH (Random Access Channel) configuration information of the Uplink carrier, configuration information of an Uplink PUSCH (Physical Uplink Shared Channel), configuration information of an Uplink PUCCH (Physical Uplink Control Channel), configuration information of an Uplink SRS (Sounding Reference Signal), and a TA offset. When the TA offset is not included in the configuration information, the terminal determines that the timing advance information of the uplink transmission can be estimated based on the downlink information of the access side.
In step S112, the source base station sends the configuration information of the uplink carrier to which the terminal is applicable to the terminal, so that the terminal accesses the uplink supplemental carrier of the target side according to the configuration information.
In some embodiments, the terminal may obtain, through an RRC connection reconfiguration message, configuration information of an uplink carrier applicable to the terminal, where the configuration information is sent by the source base station, and delete a Hybrid Automatic Repeat reQuest (HARQ) buffer and stop an uplink timer currently used by the terminal. Then, a Preamble code sending advance mode and a time-frequency position can be determined according to the TA information and the resource configuration of the RACH, so as to access to a base station supporting an NR air interface. When the target base station is a base station supporting an NR air interface, the terminal is accessed to the target base station; and when the target base station is a base station supporting an NR air interface and the target auxiliary node base station is a base station supporting an NR air interface, the terminal is accessed to the target auxiliary node base station.
By the method of the embodiment, when a plurality of LTE carriers exist in one NR coverage area, the terminal can effectively access the uplink supplementary carrier of the target side in the switching process. Thus, a non co-sited deployment scenario can also support multiple uplink supplemental carriers. The embodiment has small influence on the terminal, has good backward compatibility and deployment possibility, and is enhanced based on the existing protocol, so the embodiment is easy to realize.
An embodiment of the uplink carrier configuration method in the SA scenario of the present invention is described below with reference to fig. 2.
Fig. 2 is a flowchart illustrating an uplink carrier configuration method in an SA scenario according to some embodiments of the present invention. In this embodiment, the source base station and the target base station support only SA, or support both SA and NSA and support an NR air interface, and are respectively referred to as a source NR base station and a target NR base station in this embodiment. The target NR base station supports multiple uplink supplemental carriers, which may be referred to as target side uplink supplemental carriers. As shown in fig. 2, the uplink carrier configuration method of this embodiment includes steps S202 to S220.
In step S202, the source NR base station and the target NR base station exchange configuration information of a plurality of target side uplink supplemental carriers.
In some embodiments, when there is a direct interface between the source NR base station and the target NR base station, the source NR base station obtains configuration information of multiple uplink supplementary carriers supported by the target base station, which is sent by the target NR base station, through an Xn Setup Request (Xn Setup Request) or a gNB Config Update (gNB configuration Update) message, so that the source NR base station sends, to the target NR base station, the configuration information of the multiple source-side uplink supplementary carriers supported by the source NR base station through an Xn Setup Request ACK (Xn Setup acknowledgement) or a gNB Config Update ACK (gNB configuration Update acknowledgement) message; when no direct interface exists between the source NR base station and the target NR base station, the source NR base station obtains CONFIGURATION information of a plurality of UPLINK supplemental carriers supported by the target NR base station, which is sent by the target NR base station, through an UPLINK RAN CONFIGURATION transmission message transferred by an AMF (Access and Mobility Management Function), so that the source NR base station sends the CONFIGURATION information of the plurality of source side UPLINK supplemental carriers supported by the source NR base station through a DOWNLINK RAN CONFIGURATION transmission message transferred by the AMF.
In step S204, the source NR base station determines a set of uplink supplemental carriers available to the terminal as an alternative uplink carrier set according to the configuration information and a PLMN (Public Land Mobile Network) supported by the terminal, and generates a measurement configuration for each uplink supplemental carrier in the alternative uplink carrier set.
In some embodiments, the source NR base station determines whether to adopt a measurement configuration of the same NR system or a measurement configuration of a different NR system according to a system of a downlink carrier corresponding to each uplink supplementary carrier in the candidate uplink carrier set.
In step S206, the source NR base station transmits the measurement configuration to the terminal through an RRC connection reconfiguration message.
In step S208, the terminal measures the downlink carrier corresponding to the target side uplink supplemental carrier and the preset downlink carrier according to the measurement configuration.
In step S210, the source NR base station acquires a measurement result of the terminal.
In step S212, the source NR base station transmits the measurement result to the target NR base station through a handover request message.
In step S214, the target NR base station determines an uplink carrier to which the terminal is applied according to the measurement result.
In some embodiments, when the measurement result of the downlink preset carrier is higher than a preset threshold, the target NR base station determines the uplink preset carrier using the frequency of the NR carrier as an uplink carrier applicable to the terminal; under the condition that the measurement result of the downlink preset carrier is not higher than a preset threshold, if the measurement result comprises the measurement result of the downlink carrier corresponding to the uplink supplementary carrier, the target NR base station determines the uplink supplementary carrier with the optimal measurement result as the uplink carrier suitable for the terminal; and if the measurement result does not include the measurement result of the downlink carrier corresponding to the uplink supplementary carrier, the target NR base station determines the uplink supplementary carrier currently used by the terminal as the uplink carrier suitable for the terminal.
In step S216, the source NR base station acquires the configuration information of the uplink carrier applicable to the terminal, which is sent by the target NR base station through the handover response message.
In step S218, the source NR base station transmits configuration information of an uplink carrier to which the terminal is applicable to the terminal through an RRC connection reconfiguration message.
In step S220, the terminal accesses the target NR base station and the uplink supplemental carrier of the target side according to the configuration information.
By the method of the embodiment, the terminal can be effectively accessed to the uplink supplementary carrier of the target side in the switching process in the SA scene supporting a plurality of uplink supplementary carriers.
Fig. 3 is a signaling flow diagram in an SA scenario according to some embodiments of the invention. As shown in fig. 3, the flow of this embodiment includes steps S302 to S318.
In step S302, the target gNB sends an Xn Setup Request to the source gNB, which includes configuration information of multiple uplink supplemental carriers supported by the target gNB.
In step S304, the source gNB sends an Xn Setup Response to the target gNB, which includes configuration information of a plurality of uplink supplemental carriers supported by the source gNB.
In step S306, the source gNB sends an rrcconnectionreconfiguration message to the UE, including information of downlink carriers corresponding to the preset downlink carrier and the multiple uplink supplementary carriers supported by the target gNB.
In step S308, the UE sends a Measurement Report to the source gNB, where the Measurement Report includes Measurement results of downlink carriers corresponding to a plurality of uplink supplementary carriers supported by the target gNB and a preset downlink carrier.
In step S310, the source gNB sends HO reqrest (Handover Request) including the measurement result to the target gNB.
In step S312, the target gNB performs a selection procedure of uplink carriers to determine uplink carriers applicable to the terminal.
In step S314, the target gNB transmits a HO reqrest ACK (handover response) to the source gNB, which includes the configuration information of the uplink carrier applicable to the terminal.
In step S316, the source gNB sends an rrcconnectionreconf message to the UE, which includes configuration information of uplink carriers applicable by the terminal.
In step S318, the UE performs RACH Procedure in order to access the target gNB.
An application example of the uplink carrier configuration method in the SA scenario is described below with reference to a specific example. It is assumed that two co-frequency carriers using the frequency of the LTE carrier exist in the coverage area of the target NR base station, the frequency point of the NR carrier is 3.5GHz, a TDD mode is used, and the downlink frequency points of both the LTE carriers are F1, and the PCIs are PCI1 and PCI2, respectively. When the terminal moves from the coverage of the source NR base station to the coverage of the uplink supplemental carrier corresponding to the PCI2 in the target NR base station, the network side needs to perform reconfiguration.
The target NR base station notifies the source NR base station of configuration information of two uplink supplemental carriers supported by the target NR base station through a gbnb Config Update message. The configuration information of each uplink supplemental carrier corresponding to the PCI1 may exemplarily include:
uplink supplementary carrier identification: 001
F1 frequency point of downlink carrier wave corresponding to uplink supplementary carrier wave
The system of downlink carriers: 0
Measuring the number of ports: 2
PCI information of downlink carrier: PCI1
And after receiving the configuration of the uplink supplementary carrier wave sent by the target NR base station, the source NR base station stores corresponding configuration information. Since the source NR base station does not support additional uplink supplemental carriers, no information of any uplink supplemental carriers is carried in the feedback message gNB Config Update ACK message.
And the source NR base station determines an uplink carrier set which can be used by the terminal and generates corresponding measurement configuration according to whether the corresponding cell of the target NR base station supports the uplink supplementary carrier and PLMN application information of the uplink supplementary carrier. Since the uplink supplementary carrier adopts the LTE scheme, measurement configuration of the heterogeneous system is generated, and an example of the measurement configuration information is:
measuring mark
Measuring downlink frequency points
Measuring an event: b1 measurement
The reporting mode of the measurement report is as follows: periodic triggering
Measurement event parameter configuration set
Measuring a PCI set: PCI1 and PCI2
And the source NR base station additionally configures the measurement of the downlink carrier corresponding to the uplink supplementary carrier for the terminal in the coverage range of the source NR base station through the RRC connection reconfiguration message. And after receiving the measurement configuration information of the source NR base station, the terminal performs corresponding measurement according to the measurement configuration and reports the measurement result to the source NR base station.
And the source NR base station sends the measurement result reported by the terminal to the target base station through the switching request message. The measurement result included in the handover request message may include, for example: the measurement results of preset downlink carriers supported by the target NR base station, and the measurement results of downlink carriers corresponding to PCI1 and PCI 2. The measurement result set received by the target NR base station includes the measurement results of two carriers, where the measurement result corresponding to PCI1 is-105 dBm and the measurement result corresponding to PCI2 is-90 dBm. And the target NR base station selects the supplementary uplink carrier corresponding to the PCI2 and determines the supplementary uplink carrier as the uplink supplementary carrier suitable for the terminal.
And the target NR base station sends the configuration information of the uplink supplementary carrier suitable for the terminal to the source NR base station in a packaging mode through the switching response message. The configuration information of the uplink supplemental carrier may exemplarily include:
frequency point information of uplink carrier
Subcarrier spacing for uplink carriers
Identification of uplink carrier: 010
RACH configuration information of uplink carrier
Configuration information of uplink PUSCH
Configuration information of uplink PUCCH
Configuration information of uplink SRS
And after receiving the switching response, the source NR base station sends the configuration information of the supplementary uplink carrier wave suitable for the terminal at the target side to the terminal through the RRC reconfiguration message. After receiving the RRC reconfiguration message, the terminal stores configuration information therein, deletes all HARQ buffers, and stops uplink related MAC (Media Access Control), RLC (Radio Link Control), PDCP (Packet Data Convergence Protocol) timers. And after accessing the target NR base station, determining a Preamble code sending advance mode and a time frequency position according to the timing relation of the downlink carrier and the resource configuration of the RACH.
An embodiment of the uplink carrier configuration method in the NSA scenario of the present invention is described below with reference to fig. 4.
Fig. 4 is a flowchart illustrating an uplink carrier configuration method in an NSA scenario according to some embodiments of the present invention. In this embodiment, the source base station and the target base station support LTE air interfaces, which are referred to as a source LTE base station and a target LTE base station, respectively; the target secondary node base station is a base station supporting an NR air interface, and the target secondary node base station supports only NSA or supports both SA and NSA, and is referred to as a target NR base station in this embodiment. The target NR base station supports multiple uplink supplemental carriers, which may be referred to as target side uplink supplemental carriers. As shown in fig. 4, the uplink carrier configuration method of this embodiment includes steps S402 to S426.
In step S402, the target NR base station and the target LTE base station exchange configuration information of a plurality of target side uplink supplemental carriers.
In some embodiments, the target NR base station sends configuration information of a plurality of uplink supplemental carriers supported by the target secondary node base station to the target LTE base station through an EN-DC X2 setting request or an EN-DC gbb configuration update message; the target NR base station acquires the configuration information of a plurality of uplink supplementary carriers supported by the adjacent cell of the target LTE base station, which is sent by the target LTE base station, through an EN-DC X2 setting request confirmation or an EN-DC gNB configuration updating confirmation message. EN-DC denotes dual connectivity of a 4G radio access network with a 5G NR.
In step S404, the source LTE base station and the target LTE base station exchange configuration information of multiple target-side uplink supplemental carriers.
In some embodiments, when there is a direct interface between the source LTE base station and the target LTE base station, the source LTE base station acquires, through an X2Setup Request (X2 set Request) or an eNB Config Update (eNB configuration Update) message, configuration information of a plurality of uplink supplemental carriers supported by the target NR base station, which is sent by the target LTE base station, so that the source LTE base station sends, through an X2Setup Request ACK (X2 set acknowledgement) or an eNB Config Update ACK (eNB configuration Update acknowledgement) message, configuration information of a plurality of source-side uplink supplemental carriers supported by a 5G neighbor of the source LTE base station to the target LTE base station; when no direct interface exists between the source LTE base station and the target LTE base station, the source LTE base station obtains CONFIGURATION information of a plurality of UPLINK supplemental carriers supported by the target NR base station, which is sent by the target LTE base station, through an UPLINK RAN CONFIGURATION TRANSFER message transferred by an MME (Mobility Management Entity), so that the source LTE base station sends the CONFIGURATION information of the plurality of source side UPLINK supplemental carriers supported by the 5G neighbor of the source LTE base station to the target LTE base station through the UPLINK RAN CONFIGURATION TRANSFER message transferred by the MME.
In step S406, the source LTE base station determines, according to the configuration information and the PLMNs supported by the terminal, a set of uplink supplemental carriers available to the terminal, and uses the set as a candidate uplink carrier set, and generates a measurement configuration of each uplink supplemental carrier in the candidate uplink carrier set.
In some embodiments, the source LTE base station determines to adopt measurement configuration of the same NR system or measurement configuration of a different NR system according to a system of a downlink carrier corresponding to each uplink supplementary carrier in the candidate uplink carrier set.
In step S408, the source LTE base station transmits the measurement configuration to the terminal through an RRC connection reconfiguration message.
In step S410, the terminal measures a downlink carrier corresponding to the target side uplink supplemental carrier and a preset downlink carrier according to the measurement configuration.
In step S412, the source LTE base station acquires a measurement result of the terminal.
In step S414, the source LTE base station transmits the measurement result to the target LTE base station through the handover request message.
In step S416, the target NR base station acquires the measurement result transmitted by the target LTE base station through the SgNB addition Request (SgNB addition Request). SgNB denotes auxiliary gbb.
In step S418, the target NR base station determines an uplink carrier to which the terminal is applicable according to the measurement result.
In some embodiments, when the measurement result of the downlink preset carrier is higher than a preset threshold, the target NR base station determines the uplink preset carrier using the frequency of the NR carrier as an uplink carrier to which the terminal is applicable; under the condition that the measurement result of the downlink preset carrier is not higher than a preset threshold, if the measurement result comprises the measurement result of the downlink carrier corresponding to the uplink supplementary carrier, the target NR base station determines the uplink supplementary carrier with the optimal measurement result as the uplink carrier suitable for the terminal; and if the measurement result does not include the measurement result of the downlink carrier corresponding to the uplink supplementary carrier, the target NR base station determines the uplink supplementary carrier currently used by the terminal as the uplink carrier suitable for the terminal.
In step S420, the target NR base station transmits configuration information of an uplink carrier to which the terminal is applicable to the target LTE base station through a SgNB addition Response (SgNB addition Response) message.
In step S422, the source LTE base station acquires the configuration information of the uplink carrier applicable to the terminal, which is sent by the target LTE base station through the handover response message.
In step S424, the source LTE base station transmits configuration information of an uplink carrier to which the terminal is applicable to the terminal through an RRC connection reconfiguration message.
In step S426, the terminal accesses the target NR base station and the uplink supplemental carrier of the target side according to the configuration information.
By the method of the embodiment, in an NSA scenario supporting multiple uplink supplementary carriers, a terminal can be effectively accessed to an uplink supplementary carrier on a target side in a handover process.
Fig. 5 is a signaling flow diagram in an NSA scenario, according to some embodiments of the invention. As shown in fig. 5, the flow of this embodiment includes steps S502 to S526.
In step S502, the target EN-gNB sends an EN-DC X2Setup Request to the target eNB, which includes configuration information of multiple uplink supplemental carriers supported by the EN-gNB.
In step S504, the target eNB sends EN-DC X2Setup Response to the target EN-gNB, which includes configuration information of multiple uplink supplementary carriers supported by other neighboring cells of the target eNB.
In step S506, the target eNB sends an eNB Config Update Request to the source eNB, where the eNB Config Update Request includes configuration information of multiple uplink supplemental carriers supported by the 5G neighbor of the target eNB, that is, configuration information of the target-side uplink supplemental carrier.
In step S508, the source eNB sends an eNB Config Update ACK to the target eNB, where the eNB Config Update ACK includes configuration information of a plurality of uplink supplemental carriers supported by the 5G neighboring cell of the source eNB, that is, configuration information of the source-side uplink supplemental carrier.
In step S510, the source eNB sends an rrcconnectionreconf message to the UE, where the rrcconnectionreconf message includes information of downlink carriers corresponding to the preset downlink carrier and the target-side uplink supplemental carrier.
In step S512, the UE sends a Measurement Report to the source eNB, where the Measurement Report includes Measurement results of downlink carriers corresponding to a preset downlink carrier and a target uplink supplemental carrier.
In step S514, the source eNB sends HO Requrest, including the measurement results, to the target eNB.
In step S516, the target eNB sends SgNB addition Request including measurement result to the target en-gNB.
In step S518, the target en-gNB performs a selection procedure of uplink carriers to determine uplink carriers applicable to the terminal.
In step S520, the target en-gNB sends SgNB addition Response to the target eNB, which includes the configuration information of the uplink carrier applicable to the terminal.
In step S522, the target eNB transmits HO Requrest ACK including configuration information of the uplink carrier to which the terminal is applicable to the source eNB.
In step S524, the source eNB sends an RRCConnectionReconfig message to the UE, including configuration information of an uplink carrier to which the terminal is applicable.
In step S526, the UE performs RACH Procedure in order to access the target en-gNB.
An application example of the uplink carrier configuration method in the NSA scenario is described below with reference to a specific example. The target LTE base station is covered by adopting 800MHz carrier waves, and the coverage range of the target LTE base station is larger than the coverage range of NR 3.5 GHz. In addition, two co-frequency carriers of 2.1GHz LTE FDD are arranged in the NR coverage area, the downlink frequency points of the two LTE carriers are both F1, and the PCIs are PCI1 and PCI2 respectively. The terminal moves from the coverage of the source LTE base station to the coverage of the target LTE base station and moves to the coverage of the uplink supplementary carrier corresponding to the PCI 2. And an X2 interface is arranged between the source LTE base station and the target LTE base station.
The target NR base station informs the target LTE base station of the configuration information of the 2 uplink supplementary carriers supported by the target NR base station through an EN-DC gNB Config Update message, and the target LTE base station stores the information.
The target LTE base station informs the source LTE base station of the configuration information of 2 uplink supplementary carriers supported by the target NR base station through an eNB Config Update message, and the source LTE base station stores the corresponding configuration information.
And the source LTE base station determines an uplink carrier set which can be used by the terminal and generates corresponding measurement configuration according to whether the corresponding cell of the target LTE base station supports the uplink supplementary carrier and the PLMN application information of the uplink supplementary carrier.
And the source LTE base station additionally configures the measurement of the downlink carrier corresponding to the uplink supplementary carrier for the terminal in the coverage range of the source LTE base station through the RRC connection reconfiguration message. And after receiving the measurement configuration information of the source LTE base station, the terminal performs corresponding measurement according to the measurement configuration and reports the measurement result to the source LTE base station.
And the source LTE base station sends the measurement result reported by the terminal to the target LTE base station through the switching request message. And the target LTE base station sends the measurement result related to the target NR base station through the SgNB Addition Request. The measurement result set received by the target NR base station includes the measurement results of two carriers, where the measurement result corresponding to PCI1 is-105 dBm and the measurement result corresponding to PCI2 is-90 dBm. And the target NR base station selects the supplementary uplink carrier corresponding to the PCI2 and determines the supplementary uplink carrier as the uplink supplementary carrier suitable for the terminal.
And the target NR base station sends the configuration information of the uplink supplementary carrier suitable for the terminal to the target LTE base station in a packaging mode through the SgNB Addition Response message. The configuration information of the uplink supplemental carrier may exemplarily include:
frequency point information of uplink carrier
Subcarrier spacing for uplink carriers
Identification of uplink carrier: 3 bits
RACH configuration information of uplink carrier
Configuration information of uplink PUSCH
Configuration information of uplink PUCCH
Configuration information of uplink SRS
And after receiving the configuration, the target LTE base station places the configuration into a switching response message and sends the switching response message to the source LTE base station. And after receiving the switching response, the source LTE base station sends the configuration information of the supplementary uplink carrier suitable for the terminal at the target side to the terminal through the RRC reconfiguration message. After receiving the RRC reconfiguration message, the terminal acquires and maintains the configuration information of the uplink supplementary carrier, deletes all HARQ buffers and stops the uplink related MAC, RLC and PDCP timers. And after accessing to the target LTE base station, determining a sending advance mode and a time-frequency position of a Preamble code according to the downlink timing relationship and the resource configuration of the RACH so as to access to the target NR base station.
An embodiment of the uplink carrier configuration apparatus of the present invention is described below with reference to fig. 6.
Fig. 6 is a schematic structural diagram of an uplink carrier configuration apparatus according to some embodiments of the present invention. As shown in fig. 6, the uplink carrier configuration apparatus 600 of this embodiment is located at a source base station, and includes: a carrier information interaction module 6100 configured to obtain configuration information of a plurality of target side uplink supplementary carriers, wherein the uplink supplementary carriers employ frequencies of LTE carriers; under the condition that the source base station and the target base station support NR air interfaces, the target base station supports uplink supplementary carriers; under the condition that the source base station and the target base station support an LTE air interface and the target auxiliary node base station supports an NR air interface, the target auxiliary node base station supports an uplink supplementary carrier at the target side; a measurement configuration module 6200, configured to send measurement configuration to the terminal according to the configuration information, so that the terminal measures a downlink carrier corresponding to the target side uplink supplemental carrier according to the measurement configuration; a measurement result acquisition module 6300 configured to acquire a measurement result of the terminal; a measurement result sending module 6400, configured to send the measurement result to the target base station through the handover request message under the condition that the source base station and the target base station support the NR air interface, so that the target base station determines, according to the measurement result, an uplink carrier applicable to the terminal; or, under the condition that the source base station and the target base station support an LTE air interface and the target auxiliary node base station supports an NR air interface, sending the measurement result to the target base station through the handover request message, so that the target base station sends the measurement result to the target auxiliary node base station and the target auxiliary node base station determines an uplink carrier applicable to the terminal; a configuration information obtaining module 6500, configured to obtain the configuration information of the uplink carrier applicable to the terminal, which is sent by the target base station through the handover response message; the configuration information sending module 6600 is configured to send the configuration information of the uplink carrier that the terminal is adapted to, to the terminal, so that the terminal accesses the uplink supplemental carrier of the target side according to the configuration information.
In some embodiments, the source base station and the target base station support only SA, or both SA and NSA, and support NR air interface; the carrier information interworking module 6100 is further configured to obtain configuration information of a plurality of target side uplink supplemental carriers supported by the target base station.
In some embodiments, the carrier information interaction module 6100 is further configured to: when a direct interface exists between a source base station and a target base station, configuring an update message through an Xn setting request or a gNB, and acquiring configuration information of a plurality of target side uplink supplementary carriers supported by the target base station, wherein the configuration information is sent by the target base station; setting confirmation or gNB configuration update confirmation information through Xn, and sending configuration information of a plurality of source side uplink supplementary carriers supported by a source base station to a target base station; when a direct interface does not exist between a source base station and a target base station, acquiring configuration information of a plurality of uplink supplementary carriers supported by the target base station, which is sent by the target base station, through an uplink configuration transmission message of a wireless access network transferred by the AMF; and transmitting configuration information of a plurality of source side uplink supplementary carriers supported by the source base station to the target base station through the radio access network downlink configuration transmission message relayed by the AMF.
In some embodiments, the source base station and the target base station are base stations supporting LTE air interfaces; the target auxiliary node base station supports an NR air interface and only supports NSA or simultaneously supports SA and NSA; the carrier information interaction module 6100 is further configured to obtain, through the target base station, configuration information of a plurality of target side uplink supplemental carriers supported by the target secondary node base station.
In some embodiments, the carrier information interaction module 6100 is further configured to: when a direct interface exists between a source base station and a target base station, setting a request or an eNB configuration updating message through X2, and acquiring configuration information of a plurality of uplink supplementary carriers supported by a target auxiliary node base station, wherein the configuration information is sent by the target base station; setting confirmation or eNB configuration updating confirmation information through X2, and sending configuration information of a plurality of source side uplink supplementary carriers supported by a 5G adjacent region of a source base station to a target base station; when a direct interface does not exist between a source base station and a target base station, acquiring configuration information of a plurality of uplink supplementary carriers supported by a target auxiliary node base station, which is sent by the target base station, through a wireless access network uplink configuration transmission message transferred by an MME; and sending configuration information of a plurality of source side uplink supplementary carriers supported by the 5G neighboring area of the source base station to the target base station through the radio access network downlink configuration transmission message transferred by the MME.
In some embodiments, the measurement configuration module 6200 is further configured to determine, according to the configuration information and PLMNs supported by the terminal, a set of uplink supplemental carriers available to the terminal as an alternative set of uplink carriers; generating measurement configuration of each uplink supplementary carrier in the alternative uplink carrier set; and sending the measurement configuration to the terminal so that the terminal can measure the uplink supplementary carrier waves of the target side according to the measurement configuration.
In some embodiments, the measurement configuration module 6200 is further configured to determine the measurement configuration according to a format of a downlink carrier corresponding to each uplink supplemental carrier in the alternative uplink carrier set.
In some embodiments, the measurement configuration module 6200 is further configured to send the measurement configuration to the terminal via an RRC connection reconfiguration message according to the configuration information.
In some embodiments, the configuration information sending module 6600 is further configured to send the configuration information of the uplink carrier to which the terminal is applicable to the terminal through an RRC connection reconfiguration message.
In some embodiments, the measurement configuration includes at least one of a measurement identifier, a measured downlink frequency point, a measurement event, a measurement report reporting mode, a measurement event parameter configuration set, and a measurement PCI set.
In some embodiments, the configuration information of the uplink carrier to which the terminal is applicable includes at least one of frequency point information of the uplink carrier, a subcarrier interval of the uplink carrier, an identifier of the uplink carrier, RACH configuration information of the uplink carrier, configuration information of an uplink PUSCH, configuration information of an uplink PUCCH, configuration information of an uplink SRS, and a TA offset.
An embodiment of the uplink carrier configuration system of the present invention is described below with reference to fig. 7.
Fig. 7 is a schematic structural diagram of an uplink carrier configuration system according to some embodiments of the present invention. As shown in fig. 7, the uplink carrier configuration system 70 of this embodiment includes: a source base station 710, including any one of the foregoing uplink carrier configuration apparatuses; and the target base station 720, in the case of supporting an NR air interface, is configured to determine, according to the measurement result sent by the source base station 710, an uplink carrier applicable to the terminal; or, in the case of supporting an LTE air interface, the ue is configured to send the measurement result sent by the source base station 710 to a target secondary node base station supporting an NR air interface, so that the target secondary node base station determines, according to the measurement result, an uplink carrier applicable to the terminal.
In some embodiments, the measurement configuration further includes a measurement configuration of a preset downlink carrier, and the measurement result further includes a measurement result of the terminal on the preset downlink carrier, where the preset downlink carrier supports a frequency of an NR carrier; in the case that the source base station 710 and the target base station 720 support only SA or both SA and NSA, and support NR air interface, the target base station 720 is further configured to: determining the uplink preset carrier wave adopting the frequency of the NR carrier wave as the uplink carrier wave applicable to the terminal under the condition that the measurement result of the downlink preset carrier wave is higher than a preset threshold; under the condition that the measurement result of the downlink preset carrier is not higher than a preset threshold, if the measurement result comprises the measurement result of the downlink carrier corresponding to the uplink supplementary carrier, determining the uplink supplementary carrier with the optimal measurement result as the uplink carrier suitable for the terminal; and if the measurement result does not comprise the measurement result of the downlink carrier corresponding to the uplink supplementary carrier, determining the uplink supplementary carrier currently used by the terminal as the uplink carrier suitable for the terminal.
In some embodiments, the source base station 710 and the target base station 720 are base stations supporting LTE air interfaces; the target secondary node base station supports an NR air interface and only supports NSA or supports SA and NSA at the same time; the uplink carrier configuration system 70 further includes: a target secondary node base station 730 configured to send, to the target base station 720, configuration information of a plurality of uplink supplementary carriers supported by the target secondary node base station through an EN-DC X2 setting request or an EN-DC gbb configuration update message; and acquiring configuration information of a plurality of uplink supplementary carriers supported by the neighboring cell of the target base station 720, which is sent by the target base station 720, through an EN-DC X2 setting request acknowledgement or an EN-DC gNB configuration update acknowledgement message.
In some embodiments, the measurement configuration further includes a measurement configuration of a preset downlink carrier, and the measurement result further includes a measurement result of the terminal on the preset downlink carrier, where the preset downlink carrier supports the frequency of the NR carrier; the target secondary node base station 730 is further configured to: obtaining a measurement result sent by the target base station 720 through the SgNB addition request; determining the uplink preset carrier wave adopting the frequency of the NR carrier wave as the uplink carrier wave applicable to the terminal under the condition that the measurement result of the downlink preset carrier wave is higher than a preset threshold; under the condition that the measurement result of the downlink preset carrier is not higher than a preset threshold, if the measurement result comprises the measurement result of the downlink carrier corresponding to the uplink supplementary carrier, determining the uplink supplementary carrier with the optimal measurement result as the uplink carrier suitable for the terminal; if the measurement result does not include the measurement result of the downlink carrier corresponding to the uplink supplementary carrier, determining the uplink supplementary carrier currently used by the terminal as the uplink carrier suitable for the terminal; and sending the configuration information of the uplink carrier wave suitable for the terminal to the target base station through the switching response message.
An embodiment of the present invention further provides a computer-readable storage medium, on which a computer program is stored, where the computer program is executed by a processor to implement any one of the foregoing uplink carrier configuration methods.
As will be appreciated by one skilled in the art, embodiments of the present invention may be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable non-transitory storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein.
The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be stored in a computer-readable memory that can direct a computer or other programmable data processing apparatus to function in a particular manner, such that the instructions stored in the computer-readable memory produce an article of manufacture including instruction means which implement the function specified in the flowchart flow or flows and/or block diagram block or blocks.
These computer program instructions may also be loaded onto a computer or other programmable data processing apparatus to cause a series of operational steps to be performed on the computer or other programmable apparatus to produce a computer implemented process such that the instructions which execute on the computer or other programmable apparatus provide steps for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (31)

1. An uplink carrier configuration method includes:
a source base station acquires configuration information of a plurality of target side uplink supplementary carriers, wherein the uplink supplementary carriers adopt the frequency of LTE carriers; under the condition that the source base station and the target base station support NR air interfaces, the target base station supports the uplink supplementary carrier; under the condition that the source base station and the target base station support an LTE air interface and the target auxiliary node base station supports an NR air interface, the target auxiliary node base station supports the target side uplink supplementary carrier;
the source base station sends measurement configuration to the terminal according to the configuration information so that the terminal can measure the downlink carrier corresponding to the uplink supplementary carrier at the target side according to the measurement configuration;
a source base station acquires a measurement result of a terminal;
under the condition that the source base station and the target base station support NR air interfaces, the source base station sends the measurement result to the target base station through a switching request message so that the target base station determines an uplink carrier applicable to the terminal according to the measurement result;
under the condition that the source base station and the target base station support an LTE air interface and the target auxiliary node base station supports an NR air interface, the source base station sends the measurement result to the target base station through a switching request message so that the target base station sends the measurement result to the target auxiliary node base station and the target auxiliary node base station determines an uplink carrier applicable to the terminal;
the source base station acquires the configuration information of the uplink carrier wave which is sent by the target base station through the switching response message and is suitable for the terminal;
and the source base station sends the configuration information of the uplink carrier wave suitable for the terminal to the terminal so that the terminal can access the uplink supplementary carrier wave of the target side according to the configuration information.
2. The uplink carrier configuration method according to claim 1, wherein the source base station and the target base station support only SA, or support both SA and NSA, and support an NR air interface;
the source base station acquires configuration information of a plurality of target side uplink supplementary carriers supported by the target base station.
3. The uplink carrier configuration method of claim 2,
when a direct interface exists between a source base station and a target base station, the source base station acquires configuration information of a plurality of target side uplink supplementary carriers supported by the target base station, which is sent by the target base station, through an Xn setting request or a gNB configuration updating message, so that the source base station sends configuration information of a plurality of source side uplink supplementary carriers supported by the source base station to the target base station through an Xn setting confirmation or a gNB configuration updating confirmation message;
when no direct interface exists between the source base station and the target base station, the source base station configures transmission information through the wireless access network uplink transferred by the access and mobility management function AMF, and acquires configuration information of a plurality of uplink supplementary carriers supported by the target base station, so that the source base station configures the transmission information through the wireless access network downlink transferred by the AMF, and transmits the configuration information of a plurality of source side uplink supplementary carriers supported by the source base station to the target base station.
4. The uplink carrier configuration method according to claim 2, wherein the measurement configuration further includes a measurement configuration of a preset downlink carrier, and the measurement result further includes a measurement result of the terminal on the preset downlink carrier, and the preset downlink carrier supports a frequency of an NR carrier;
the uplink carrier configuration method further comprises:
under the condition that the measurement result of the downlink preset carrier is higher than a preset threshold, the target base station determines the uplink preset carrier adopting the frequency of the NR carrier as the uplink carrier suitable for the terminal;
under the condition that the measurement result of the downlink preset carrier is not higher than a preset threshold, if the measurement result comprises the measurement result of the downlink carrier corresponding to the uplink supplementary carrier, the target base station determines the uplink supplementary carrier with the optimal measurement result as the uplink carrier applicable to the terminal; and if the measurement result does not include the measurement result of the downlink carrier corresponding to the uplink supplementary carrier, the target base station determines the uplink supplementary carrier currently used by the terminal as the uplink carrier applicable to the terminal.
5. The uplink carrier configuration method according to claim 1, wherein the source base station and the target base station are base stations supporting an LTE air interface; the target auxiliary node base station supports an NR air interface and only supports NSA or simultaneously supports SA and NSA;
and the source base station acquires the configuration information of a plurality of target side uplink supplementary carriers supported by the target auxiliary node base station through the target base station.
6. The uplink carrier configuration method according to claim 5, wherein,
when a direct interface exists between a source base station and a target base station, the source base station sets a request or an eNB configuration update message through X2, and acquires configuration information of a plurality of uplink supplementary carriers supported by a target auxiliary node base station, which is sent by the target base station, so that the source base station sets confirmation or the eNB configuration update confirmation message through X2, and sends configuration information of a plurality of source side uplink supplementary carriers supported by a 5G adjacent cell of the source base station to the target base station;
when no direct interface exists between the source base station and the target base station, the source base station acquires configuration information of a plurality of uplink supplementary carriers supported by the target auxiliary node base station, which is sent by the target base station, through a radio access network uplink configuration transmission message transferred by a Mobile Management Entity (MME), so that the source base station transmits the configuration information of a plurality of source side uplink supplementary carriers supported by a 5G neighbor cell of the source base station to the target base station through the radio access network downlink configuration transmission message transferred by the MME.
7. The uplink carrier configuration method of claim 6, further comprising:
and the target auxiliary node base station sends the configuration information of the plurality of uplink supplementary carriers supported by the target auxiliary node base station to the target base station through an EN-DC X2 setting request or an EN-DC gNB configuration updating message.
8. The uplink carrier configuration method of claim 7, further comprising:
and the target auxiliary node base station acquires the configuration information of the plurality of uplink supplementary carriers supported by the adjacent cell of the target base station sent by the target base station through an EN-DC X2 setting request confirmation or an EN-DC gNB configuration updating confirmation message.
9. The uplink carrier configuration method according to claim 5, wherein the measurement configuration further includes a measurement configuration of a preset downlink carrier, and the measurement result further includes a measurement result of a terminal on the preset downlink carrier, and the preset downlink carrier supports a frequency of an NR carrier;
the uplink carrier configuration method further comprises:
the target auxiliary node base station acquires a measurement result sent by the target base station through the SgNB addition request;
under the condition that the measurement result of the downlink preset carrier is higher than a preset threshold, the target auxiliary node base station determines the uplink preset carrier adopting the frequency of the NR carrier as the uplink carrier suitable for the terminal;
under the condition that the measurement result of the downlink preset carrier is not higher than a preset threshold, if the measurement result comprises the measurement result of the downlink carrier corresponding to the uplink supplementary carrier, the target auxiliary node base station determines the uplink supplementary carrier with the optimal measurement result as the uplink carrier suitable for the terminal; if the measurement result does not include the measurement result of the downlink carrier corresponding to the uplink supplementary carrier, the target auxiliary node base station determines the uplink supplementary carrier currently used by the terminal as the uplink carrier applicable to the terminal;
and the target auxiliary node base station sends the configuration information of the uplink carrier wave suitable for the terminal to the target base station through the SgNB addition response message.
10. The uplink carrier configuration method according to any one of claims 1 to 9, wherein the sending, by the source base station, the measurement configuration to the terminal according to the configuration information includes:
the source base station determines a set of uplink supplementary carriers available for the terminal as a set of alternative uplink carriers according to the configuration information and a Public Land Mobile Network (PLMN) supported by the terminal;
the source base station generates measurement configuration of each uplink supplementary carrier in the alternative uplink carrier set;
and the source base station sends the measurement configuration to the terminal so that the terminal can measure the uplink supplementary carrier waves of the target side according to the measurement configuration.
11. The uplink carrier configuration method according to claim 10, wherein the source base station determines the measurement configuration according to a system of a downlink carrier corresponding to each uplink supplemental carrier in the candidate uplink carrier set.
12. The uplink carrier configuration method according to any one of claims 1 to 9, wherein the source base station sends the measurement configuration to the terminal through an RRC connection reconfiguration message according to the configuration information.
13. The uplink carrier configuration method according to any one of claims 1 to 9, wherein the source base station sends the configuration information of the uplink carrier to which the terminal is adapted to the terminal through an RRC connection reconfiguration message.
14. The uplink carrier configuration method of claim 13, further comprising:
the terminal acquires the configuration information of the uplink carrier wave which is sent by the source base station and is suitable for the terminal through the RRC connection reconfiguration message;
the terminal deletes the HARQ cache and stops the uplink timer used by the terminal currently;
and the terminal is accessed to the target base station or the auxiliary node base station of the target base station.
15. The uplink carrier configuration method according to any one of claims 1 to 9, wherein the measurement configuration includes at least one of a measurement identifier, a measured downlink frequency point, a measurement event, a measurement report reporting mode, a measurement event parameter configuration set, and a measurement PCI set.
16. The uplink carrier configuration method according to any one of claims 1 to 9, wherein the configuration information of the uplink carrier to which the terminal is applied includes at least one of frequency point information of the uplink carrier, a subcarrier interval of the uplink carrier, an identifier of the uplink carrier, RACH configuration information of the uplink carrier, configuration information of an uplink PUSCH, configuration information of an uplink PUCCH, configuration information of an uplink SRS, and a TA offset.
17. An uplink carrier configuration device, located at a source base station, includes:
the system comprises a carrier information interaction module, a carrier information interaction module and a control module, wherein the carrier information interaction module is configured to acquire configuration information of a plurality of target side uplink supplementary carriers, and the uplink supplementary carriers adopt the frequency of LTE carriers; under the condition that the source base station and the target base station support NR air interfaces, the target base station supports the uplink supplementary carrier; under the condition that a source base station and a target base station support an LTE air interface and a target auxiliary node base station supports an NR air interface, the target auxiliary node base station supports the target side uplink supplementary carrier;
the measurement configuration module is configured to send measurement configuration to the terminal according to the configuration information so that the terminal can measure a downlink carrier corresponding to the uplink supplementary carrier of the target side according to the measurement configuration;
a measurement result acquisition module configured to acquire a measurement result of the terminal;
the measurement result sending module is configured to send the measurement result to the target base station through a handover request message under the condition that the source base station and the target base station support the NR air interface, so that the target base station determines the uplink carrier applicable to the terminal according to the measurement result; or, under the condition that the source base station and the target base station support an LTE air interface and the target auxiliary node base station supports an NR air interface, sending the measurement result to the target base station through a handover request message, so that the target base station sends the measurement result to the target auxiliary node base station and the target auxiliary node base station determines an uplink carrier applicable to the terminal;
a configuration information acquisition module configured to acquire configuration information of an uplink carrier applicable to the terminal, which is sent by a target base station through a handover response message;
and the configuration information sending module is configured to send the configuration information of the uplink carrier suitable for the terminal to the terminal so that the terminal can access the uplink supplementary carrier of the target side according to the configuration information.
18. The uplink carrier configuration device according to claim 17, wherein the source base station and the target base station support only SA, or support both SA and NSA, and support an NR air interface;
the carrier information interaction module is further configured to acquire configuration information of a plurality of target side uplink supplementary carriers supported by a target base station.
19. The uplink carrier configuration device of claim 18, wherein the carrier information interaction module is further configured to:
when a direct interface exists between a source base station and a target base station, acquiring configuration information of a plurality of target side uplink supplementary carriers supported by the target base station, which is sent by the target base station, through an Xn setting request or a gNB configuration update message; setting confirmation or gNB configuration update confirmation information through Xn, and sending configuration information of a plurality of source side uplink supplementary carriers supported by a source base station to a target base station;
when a direct interface does not exist between a source base station and a target base station, acquiring configuration information of a plurality of uplink supplementary carriers supported by the target base station, which is sent by the target base station, through an uplink configuration transmission message of a wireless access network transferred by the AMF; and transmitting configuration information of a plurality of source side uplink supplementary carriers supported by the source base station to the target base station through the radio access network downlink configuration transmission message relayed by the AMF.
20. The uplink carrier configuration device according to claim 17, wherein the source base station and the target base station are base stations supporting an LTE air interface; the target auxiliary node base station supports an NR air interface and only supports NSA or simultaneously supports SA and NSA;
the carrier information interaction module is further configured to acquire, through the target base station, configuration information of a plurality of target side uplink supplementary carriers supported by the target secondary node base station.
21. The uplink carrier configuration device of claim 20, wherein the carrier information interaction module is further configured to:
when a direct interface exists between a source base station and a target base station, setting a request or eNB configuration update message through X2, and acquiring configuration information of a plurality of uplink supplementary carriers supported by a target auxiliary node base station, wherein the configuration information is sent by the target base station; setting confirmation or eNB configuration updating confirmation information through the X2, and sending configuration information of a plurality of source side uplink supplementary carriers supported by the 5G adjacent cell of the source base station to the target base station;
when a direct interface does not exist between a source base station and a target base station, acquiring configuration information of a plurality of uplink supplementary carriers supported by a target auxiliary node base station, which is sent by the target base station, through a wireless access network uplink configuration transmission message transferred by an MME; and transmitting configuration information of a plurality of source side uplink supplementary carriers supported by a 5G adjacent region of the source base station to the target base station through the radio access network downlink configuration transmission message transferred by the MME.
22. The uplink carrier configuration device according to any one of claims 17 to 21, wherein the measurement configuration module is further configured to determine, according to the configuration information and PLMNs supported by the terminal, a set of uplink supplementary carriers available to the terminal as the alternative uplink carrier set; generating measurement configuration of each uplink supplementary carrier in the alternative uplink carrier set; and sending the measurement configuration to a terminal so that the terminal can measure the uplink supplementary carrier waves of the target side according to the measurement configuration.
23. The apparatus according to claim 22, wherein the measurement configuration module is further configured to determine the measurement configuration according to a system of a downlink carrier corresponding to each uplink supplemental carrier in the candidate uplink carrier set.
24. The uplink carrier configuration device according to any of claims 17 to 21, wherein the measurement configuration module is further configured to send a measurement configuration to the terminal through an RRC connection reconfiguration message according to the configuration information.
25. The uplink carrier configuration device according to any one of claims 17 to 21, wherein the configuration information sending module is further configured to send the configuration information of the uplink carrier to which the terminal is applicable to the terminal through an RRC connection reconfiguration message.
26. The uplink carrier configuration device according to any one of claims 17 to 21, wherein the measurement configuration includes at least one of a measurement identifier, a measured downlink frequency point, a measurement event, a measurement report reporting manner, a measurement event parameter configuration set, and a measurement PCI set.
27. The uplink carrier configuration device according to any one of claims 17 to 21, wherein the configuration information of the uplink carrier to which the terminal is applied includes at least one of frequency point information of the uplink carrier, a subcarrier interval of the uplink carrier, an identifier of the uplink carrier, RACH configuration information of the uplink carrier, configuration information of an uplink PUSCH, configuration information of an uplink PUCCH, configuration information of an uplink SRS, and a TA offset.
28. An uplink carrier configuration system, comprising:
a source base station, comprising the uplink carrier configuration device of any one of claims 17 to 27; and (c) a second step of,
the target base station is configured to determine an uplink carrier applicable to the terminal according to a measurement result sent by the source base station under the condition of supporting an NR air interface; or, in the case of supporting an LTE air interface, the ue is configured to send the measurement result sent by the source base station to the target secondary node base station supporting an NR air interface, so that the target secondary node base station determines, according to the measurement result, the uplink carrier applicable to the terminal.
29. The uplink carrier configuration system of claim 28, wherein the measurement configuration further includes a measurement configuration of a preset downlink carrier, and the measurement result further includes a measurement result of a terminal on the preset downlink carrier, and the preset downlink carrier supports a frequency of an NR carrier;
in a case where the source base station and the target base station support only SA or both SA and NSA and support an NR air interface, the target base station is further configured to: determining the uplink preset carrier wave adopting the frequency of the NR carrier wave as the uplink carrier wave applicable to the terminal under the condition that the measurement result of the downlink preset carrier wave is higher than a preset threshold; under the condition that the measurement result of the downlink preset carrier is not higher than a preset threshold, if the measurement result comprises the measurement result of the downlink carrier corresponding to the uplink supplementary carrier, determining the uplink supplementary carrier with the optimal measurement result as the uplink carrier suitable for the terminal; and if the measurement result does not comprise the measurement result of the downlink carrier corresponding to the uplink supplementary carrier, determining the uplink supplementary carrier currently used by the terminal as the uplink carrier suitable for the terminal.
30. The uplink carrier configuration system according to claim 28, wherein the source base station and the target base station are base stations supporting an LTE air interface; the target secondary node base station supports an NR air interface and only supports NSA or supports SA and NSA at the same time;
the uplink carrier configuration system further comprises:
the target secondary node base station is configured to send configuration information of a plurality of uplink supplementary carriers supported by the target secondary node base station to the target base station through an EN-DC X2 setting request or an EN-DC gNB configuration updating message; and acquiring the configuration information of a plurality of uplink supplementary carriers supported by the adjacent cell of the target base station, which is sent by the target base station, through an EN-DC X2 setting request confirmation or an EN-DC gNB configuration updating confirmation message.
31. The uplink carrier configuration system of claim 30, wherein the measurement configuration further includes a measurement configuration of a preset downlink carrier, and the measurement result further includes a measurement result of a terminal on the preset downlink carrier, and the preset downlink carrier supports a frequency of an NR carrier;
the target secondary node base station is further configured to: obtaining a measurement result sent by a target base station through an SgNB addition request; determining the uplink preset carrier wave adopting the frequency of the NR carrier wave as the uplink carrier wave suitable for the terminal under the condition that the measurement result of the downlink preset carrier wave is higher than a preset threshold; under the condition that the measurement result of the downlink preset carrier is not higher than a preset threshold, if the measurement result comprises the measurement result of the downlink carrier corresponding to the uplink supplementary carrier, determining the uplink supplementary carrier with the optimal measurement result as the uplink carrier suitable for the terminal; if the measurement result does not include the measurement result of the downlink carrier corresponding to the uplink supplementary carrier, determining the uplink supplementary carrier currently used by the terminal as the uplink carrier applicable to the terminal; and sending the configuration information of the uplink carrier wave suitable for the terminal to the target base station through the switching response message.
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