CN109168179B - System dual-connection scheduling method and device - Google Patents
System dual-connection scheduling method and device Download PDFInfo
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Abstract
The embodiment of the application provides a system dual-connection scheduling strategy and device, relates to the field of communication, and can effectively improve the spectrum utilization rate of a system on the premise of not influencing terminal experience for a terminal which does not support the LTE-NR dual-transmission function under partial frequency bands. The method comprises the following steps: when the first base station determines that the terminal does not have the function of supporting LTE-NR dual transmission, receiving a measurement report containing cell signal quality of an LTE cell and an NR cell reported by the terminal, wherein the LTE cell and the NR cell are cells under the coverage of the first base station and the second base station respectively, judging whether the signal quality of the LTE cell and the NR cell meets a preset condition or not by the first base station, if so, sending a first RRC reconfiguration message and first configuration information to the terminal and the second base station by the first base station respectively, and enabling the second base station to establish SRB3 and DRB2 for the terminal according to the first configuration information; if not, the first base station establishes a DRB1 for the terminal. The embodiment of the application is used for improving the frequency spectrum utilization rate of the system on the premise of not influencing terminal experience.
Description
Technical Field
The present application relates to the field of communications, and in particular, to a system dual-connection scheduling policy and apparatus.
Background
Dual connectivity is an important solution of a fifth Generation mobile communication technology (5th-Generation mobile communication technology, 5G) system, and includes Long Term Evolution-New air interface (LTE-NR) dual connectivity and New air interface-New air interface (NR-NR) dual connectivity. Wherein, the LTE-NR dual connectivity function is a mandatory function of a 5G NR dependent deployment scenario. The LTE-NR dual connectivity may use LTE as a cover layer and NR as a capacity layer, and a 5G terminal operating in the dual connectivity mode may experience performance gains brought by both LTE and NR systems. However, for the frequency band combination of partial LTE-NR dual connectivity, when the 5G terminal performs two system pilot frequency simultaneous transmissions, self-interference may be generated, and when the receiver falls locally within the receiving frequency band of a certain link, demodulation of the receiver may be directly affected. Therefore, for such frequency band combinations with severe interference, the 5G terminal is usually configured in uplink single-shot mode to avoid severe interference problems.
However, such a solution does not consider optimizing the performance of the 5G terminal operating in the uplink single-shot mode, so that the uplink rate and the downlink rate of the 5G terminal are affected, and the performance of the 5G terminal is deteriorated.
Disclosure of Invention
The embodiment of the application provides a system dual-connection scheduling strategy and device, and for a terminal which does not support an LTE-NR dual-transmission function under a partial frequency band, the overall spectrum utilization rate of the system can be effectively improved on the premise of not influencing terminal experience.
In a first aspect, a system dual-connection scheduling policy is provided, including: when the first base station determines that the terminal does not have the function of supporting LTE-NR dual transmission, receiving a measurement report reported by the terminal, wherein the measurement report comprises the cell signal quality of an LTE cell and the cell signal quality of an NR cell, the LTE cell is a cell under the coverage of the first base station, and the NR cell is a cell under the coverage of a second base station; the first base station judges whether the cell signal quality of an LTE cell and the cell signal quality of an NR cell meet preset conditions or not; if the preset condition is met, the first base station issues a first Radio Resource Control (RRC) reconfiguration message to the terminal, and sends first configuration information to the second base station, where the first configuration information is used to instruct the second base station to establish a Signaling Radio Bearer (SRB) 3 and a Data Radio Bearer (DRB) 2 for the terminal, and the first RRC reconfiguration message is used to enable the terminal to know that the first base station configures an NR Cell as a Secondary Cell (PSCell) of the first base station; if the preset condition is not met, the first base station establishes a DRB1 for the terminal. For a terminal which does not have the function of supporting LTE-NR dual transmission, the design can realize that when the preset condition is met, the NR cell bears the relevant data information of the terminal, and when the preset condition is not met, the relevant information of the terminal falls back to the LTE cell for transmission, so that the overall spectrum utilization rate of the system can be effectively improved on the premise of not influencing the terminal experience.
In one possible design, the Cell Signal quality is Reference Signal Receiving Power (RSRP), RSRP of an LTE Cell is obtained by a terminal measuring a Cell Reference Signal (CRS), and RSRP of an NR Cell is obtained by a terminal measuring a Secondary Synchronization Signal (SSS); the preset conditions are as follows: RSRP1+ offset > RSRP2, where offset is an offset value, RSRP1 is the RSRP of the NR cell, and RSRP2 is the RSRP of the LTE cell. By setting a proper offset value in a preset condition, the threshold of the data carried by the NR cell can be effectively controlled, so that the effect that the number of the carrying terminals of the NR cell can be controlled and matched is achieved.
In one possible design, if the terminal is in an RRC idle state, the first base station establishes a default SRB0 for the terminal; if the terminal is in an RRC connected state, the first base station establishes an SRB1 for the terminal when a preset condition is satisfied, and if the preset condition is not satisfied, the first base station provides an SRB2 for the terminal if the first base station detects Non-access stratum (NAS) message transmission, and if the NAS message transmission is not detected, the first base station establishes an SRB1 for the terminal. By the design, the first base station provides corresponding bearing for the terminals in different states, and the working performance of the terminal can be ensured on the premise that the terminal does not have the function of supporting LTE-NR dual transmission.
In a possible design, after the measurement report is updated, if the cell signal quality of the LTE cell and the cell signal quality of the NR cell do not satisfy the preset condition, the first base station sends a second RRC reconfiguration message to the terminal, and sends second configuration information to the second base station, where the second configuration information is used to instruct the second base station to release RRC connection between the second base station and the terminal, and the second RRC reconfiguration message is used to enable the terminal to know that the first base station establishes the DRB1 for the terminal. Therefore, the updated information of the measurement report is substituted into the preset condition for judgment, when the preset condition is not met, the second base station does not meet the requirement of providing service bearing for the terminal, the second base station releases RRC connection between the second base station and the terminal, and the first base station establishes DRB for the terminal, so that the terminal experience is not influenced.
In a second aspect, a system dual-connection scheduling policy is provided, including: the second base station receives first configuration information sent by the first base station, wherein the first configuration information is used for indicating the second base station to establish SRB3 and DRB2 for the terminal, and the second base station establishes SRB3 and DRB2 for the terminal according to the first configuration information. The design can enable the second base station to provide service for the terminal according to the configuration information sent by the first base station.
In one possible design, the system dual-connection scheduling policy further includes: and the second base station receives second configuration information sent by the first base station, wherein the second configuration information is used for indicating the second base station to release the RRC connection between the second base station and the terminal, and the second base station releases the RRC connection between the second base station and the terminal according to the second configuration information. Therefore, the second base station can release the RRC connection between the second base station and the terminal according to the second configuration information sent by the first base station.
In a third aspect, a system dual-connection scheduling apparatus is provided, which is disposed in a first base station, and includes: the terminal comprises a determining unit, a judging unit and a judging unit, wherein the determining unit is used for determining that the terminal does not have the function of supporting LTE-NR dual transmission; the terminal comprises a receiving unit and a processing unit, wherein the receiving unit is used for receiving a measurement report reported by the terminal, and the measurement report comprises the cell signal quality of an LTE cell and the cell signal quality of an NR cell, wherein the LTE cell is a cell under the coverage of a first base station, and the NR cell is a cell under the coverage of a second base station; the judging unit is used for judging whether the cell signal quality of the LTE cell and the cell signal quality of the NR cell meet preset conditions or not; a sending unit, configured to send a first RRC reconfiguration message to the terminal when a preset condition is met, and send first configuration information to the second base station, where the first configuration information is used to indicate the second base station to establish SRB3 and DRB2 for the terminal, and the first RRC reconfiguration message is used to enable the terminal to know that the first base station configures an NR cell as a secondary cell PSCell of the first base station; and the processing unit is used for establishing a DRB1 for the terminal when the preset condition is not met.
In one possible design, the cell signal quality is RSRP, RSRP of an LTE cell is obtained by a terminal measuring CRS, and RSRP of an NR cell is obtained by a terminal measuring SSS; the preset conditions are as follows: RSRP1+ offset > RSRP2, where offset is an offset value, RSRP1 is the RSRP of the NR cell, and RSRP2 is the RSRP of the LTE cell.
In one possible design, if the terminal is in an RRC idle state, the processing unit establishes a default SRB0 for the terminal; if the terminal is in an RRC connected state, the processing unit establishes an SRB1 for the terminal when a preset condition is satisfied, if the preset condition is not satisfied, the processing unit establishes an SRB2 for the terminal when the device detects NAS message transmission, and if the NAS message transmission is not detected, the device establishes an SRB1 for the terminal.
In a possible design, after the measurement report is updated, if the cell signal quality of the LTE cell and the cell signal quality of the NR cell do not satisfy the preset condition, the sending unit is further configured to send a second RRC reconfiguration message to the terminal, and send second configuration information to the second base station, where the second configuration information is used to instruct the second base station to release RRC connection between the second base station and the terminal, and the second RRC reconfiguration message is used to enable the terminal to know that the first base station establishes the DRB1 for the terminal.
In a fourth aspect, a system dual-connection scheduling apparatus is provided, which is disposed in a second base station, and includes: a receiving unit, configured to receive first configuration information sent by a first base station, where the first configuration information is used to instruct a second base station to establish an SRB3 and a DRB2 for a terminal; and the processing unit is used for establishing the SRB3 and the DRB2 for the terminal according to the first configuration information.
In a possible design, the receiving unit is further configured to receive second configuration information sent by the first base station, where the second configuration information is used to instruct the second base station to release an RRC connection between the second base station and the terminal; and the processing unit is further used for releasing the RRC connection between the second base station and the terminal according to the second configuration information.
The embodiment of the application provides a system dual-connection scheduling strategy and a device, when a first base station determines that a terminal does not have the function of supporting LTE-NR dual transmission, the first base station receives a measurement report reported by the terminal, wherein the measurement report includes cell signal quality of the LTE cell and cell signal quality of the NR cell, and the LTE cell and the NR cell are respectively the cells under the coverage of the first base station and the second base station, the first base station judges whether the cell signal quality of the LTE cell and the cell signal quality of the NR cell meet the preset conditions or not, if the preset conditions are met, the first base station issues a first Radio Resource Control (RRC) reconfiguration message to the terminal, and sends first configuration information to the second base station, wherein the first configuration information is used for indicating the second base station to establish a radio resource control (SRB) 3 and a radio resource control (DRB) 2 for the terminal, and the first RRC reconfiguration message is used for enabling the terminal to know that the first base station configures the NR cell as the PSCell of the first base station; if the preset condition is not met, the first base station establishes a DRB1 for the terminal. According to the scheme provided by the application, when the preset condition is met for the terminal which does not have the function of supporting LTE-NR double-transmission, the relevant data information of the terminal is borne by the NR cell, and when the preset condition is not met, the relevant information of the terminal falls back to the LTE cell for transmission, and meanwhile, an operator can effectively control the threshold for bearing the terminal data by the NR cell by setting a proper offset value, so that the overall spectrum utilization rate of the system is improved in a controllable and configurable mode on the premise of not influencing terminal experience.
Drawings
Fig. 1 is a schematic diagram of an LTE-NR dual connectivity scenario provided in an embodiment of the present application;
fig. 2 is a schematic flow chart of a system dual-connection scheduling policy according to an embodiment of the present application;
fig. 3 is a schematic flow chart of a system dual-connection scheduling policy according to an embodiment of the present application;
fig. 4 is a schematic view of a bearer mapping relationship between a wireless side and a terminal and a core network according to an embodiment of the present application;
fig. 5 is a schematic structural diagram of a system dual-connection scheduling apparatus according to an embodiment of the present application;
fig. 6 is a schematic structural diagram of a system dual-connection scheduling apparatus according to an embodiment of the present application;
fig. 7 is a schematic structural diagram of a system dual-connection scheduling apparatus according to an embodiment of the present application;
fig. 8 is a schematic structural diagram of a system dual-connection scheduling apparatus according to an embodiment of the present application;
fig. 9 is a schematic structural diagram of a system dual-connection scheduling apparatus according to an embodiment of the present application;
fig. 10 is a schematic structural diagram of a system dual-connection scheduling apparatus according to an embodiment of the present application.
Detailed Description
In the embodiments of the present application, words such as "optionally" or "for example" are used to mean serving as examples, illustrations or explanations. Any embodiment or design described as "optional" or "for example" in embodiments of the invention is not to be construed as preferred or advantageous over other embodiments or designs. Rather, use of the word "optionally" or "such as" is intended to present related concepts in a concrete fashion.
The method and the device can be applied to an LTE-NR dual-connection scene, as shown in fig. 1, the LTE base station and the NR base station are deployed at the same site, wherein the NR base station is not deployed independently, the LTE-NR dual-connection mode is adopted to provide services for the 5G terminal, and the LTE base station and the NR base station can be used as an outdoor macro base station so as to provide the coverage range as large as possible at the initial stage of 5G commercial use. Since the deployment frequency band of the NR base station is higher than that of the LTE base station, path loss of a wireless signal is large in a transmission process, and therefore, the coverage area of the NR cell is smaller than that of the LTE cell.
With reference to fig. 1, an embodiment of the present application provides a system dual-connection scheduling policy, as shown in fig. 2, including:
201. and when the first base station determines that the terminal does not have the function of supporting LTE-NR dual transmission, the first base station receives a measurement report reported by the terminal.
In this embodiment of the application, the first base station may be an LTE base station in fig. 1, a cell within a coverage area of the first base station is an LTE cell, the second base station may be an NR base station in fig. 1, and a cell within a coverage area of the second base station is an NR cell. When the terminal does not have a hardware link supporting the LTE-NR dual transmission function, or the terminal supports the LTE-NR dual transmission function but the performance of the terminal does not meet the requirement, the first base station determines that the terminal does not have the function supporting the LTE-NR dual transmission.
The first base station receives a measurement report reported by the terminal, and the measurement report may include cell signal quality of an LTE cell and cell signal quality of an NR cell.
202. The first base station judges whether the cell signal quality of the LTE cell and the cell signal quality of the NR cell meet preset conditions. If the preset condition is met, executing step 203; if the preset condition is not satisfied, step 204 is executed.
Alternatively, the cell Signal Quality may be RSRP, Reference Signal Receiving Quality (RSRQ), or other parameters known to those skilled in the art, and the present application is not limited thereto.
In the embodiment of the present application, the preset condition may be that the sum of the cell signal quality of the NR cell and the offset value is greater than the cell signal quality of the LTE cell.
203. The first base station sends a first RRC reconfiguration message to the terminal and sends the first configuration message to the second base station.
When the cell signal quality of the LTE cell and the cell signal quality of the NR cell satisfy a preset condition, it indicates that the NR cell can provide a data service bearer for the terminal as a capacity layer. Therefore, the first base station sequentially sends first configuration information and first RRC reconfiguration messages to the second base station and the terminal, respectively, where the first RRC reconfiguration message is used for enabling the terminal to know that the first base station configures the NR cell under the second base station as the secondary cell PSCell of the first base station, and the first configuration information indicates that the second base station establishes SRB3 and DRB2 for the terminal, where SRB3 is a control plane signaling radio bearer established by the second base station, and DRB2 is a user plane data service bearer established by the second base station.
204. The first base station establishes a DRB1 for the terminal.
When the cell signal quality of the LTE cell and the cell signal quality of the NR cell do not satisfy the preset condition, indicating that the NR cell does not meet the requirements of providing the SRB3 and the DRB2 for the terminal, the first base station provides the DRB1 for the terminal.
The embodiment of the application provides a system dual-connection scheduling strategy, when a first base station determines that a terminal does not have a function of supporting LTE-NR dual transmission, the first base station receives a measurement report reported by the terminal, wherein the measurement report includes cell signal quality of the LTE cell and cell signal quality of the NR cell, and the LTE cell and the NR cell are respectively the cells under the coverage of the first base station and the second base station, the first base station judges whether the cell signal quality of the LTE cell and the cell signal quality of the NR cell meet the preset conditions or not, if the preset conditions are met, the first base station issues a first RRC reconfiguration message to the terminal, and sends a first configuration message to the second base station, where the first configuration message is used to instruct the second base station to establish SRB3 and DRB2 for the terminal, and the first RRC reconfiguration message is used to enable the terminal to know that the first base station configures the NR cell as the secondary cell PSCell of the first base station; if the preset condition is not met, the first base station establishes a DRB1 for the terminal. According to the scheme provided by the application, when the preset condition is met for the terminal which does not have the function of supporting LTE-NR double-transmission, the relevant data information of the terminal is borne by the NR cell, and when the preset condition is not met, the relevant information of the terminal falls back to the LTE cell for transmission, and meanwhile, an operator can effectively control the threshold for bearing the terminal data by the NR cell by setting a proper offset value, so that the overall spectrum utilization rate of the system is improved in a controllable and configurable mode on the premise of not influencing terminal experience.
On the basis of fig. 2, an embodiment of the present application provides a system dual-connection scheduling policy, and as shown in fig. 3, a specific scheduling policy initiated from terminal access to a single-shot terminal may include:
301. and the terminal completes the initial access process and reports the capacity.
The terminal in the embodiment of the application may be a 5G terminal, and after the terminal completes an initial access process, the first base station notifies the terminal to perform capability reporting, where the capability of the terminal includes a baseband capability and a capability of whether the terminal supports LTE-NR dual-transmission and other frequency band correlation.
302. The first base station judges whether the terminal has the function of supporting LTE-NR dual-transmission. If the terminal does not support the LTE-NR dual-transmission function, step 303 is executed; and if the terminal supports the LTE-NR dual-transmission function, adopting an LTE-NR dual-transmission scheduling strategy.
After receiving the capability reported by the terminal, the first base station determines whether the terminal has a function of supporting LTE-NR dual-transmission on a specific frequency band combination (e.g., a combination of an LTE frequency band and an NR frequency band in which a 5G network operates).
303. And the terminal determines to adopt a single-shot scheduling strategy.
When the first base station judges that the terminal does not have the function of supporting LTE-NR dual transmission, the terminal determines to adopt a single-transmission scheduling strategy, and the single-transmission scheduling strategy is as shown in the following steps: when the information contained in the measurement report reported by the terminal meets the preset condition, if the terminal is in an RRC idle state, a first base station establishes a default bearer for the terminal; if the terminal is in the RRC connection state, the second base station establishes a data service bearer for the terminal, and the first base station is responsible for the mobility of the terminal and the relevant functions of cell configuration. And when the measurement report information reported by the terminal does not accord with the preset condition, the first base station establishes a control plane signaling bearer for the terminal no matter the terminal is in an RRC idle state or an RRC connected state.
304. The first base station establishes a default SRB0 for the terminal.
After the terminal completes the initial access process and the processes of security, authentication, capability reporting and the like, if no service is transmitted within a period of time, the first base station releases the RRC connection between the first base station and the terminal, and the terminal enters an RRC idle state. The terminal needs to attach to an LTE cell in an RRC idle state, and at this time, the first base station establishes a default signaling radio bearer SRB0 for the terminal, where the SRB0 is used to enable the terminal to send an RRC message to the first base station through a Common Control Channel (CCCH) logical Channel.
305. When the terminal has a service request, the terminal initiates an RRC connection establishment process to the first base station.
When the terminal has a service request, for example, a voice service or a data service, the terminal initiates an RRC connection establishment request to the first base station to establish a dedicated bearer. The RRC connection establishment request initiated by the terminal carries an initial NAS identifier of the terminal, an establishment cause, and the like, where the establishment cause may include dialing an emergency number, accessing with a high priority, accessing by a called party, sending a signaling, sending data, and the like.
306. The first base station establishes an SRB1 bearer to the terminal.
After receiving the RRC connection establishment request sent by the terminal, the first base station sends an RRC connection establishment message carrying complete configuration information of SRB1 to the terminal, and then receives an RRC connection establishment completion message carrying an NAS sent by the terminal. After the RRC connection is established, the first base station establishes an SRB1 bearer for the terminal, so as to be responsible for related functions such as mobility of the terminal and cell configuration.
307. And the terminal reports the measurement report to the first base station in the RRC connection state.
After entering an RRC connection state, the terminal reports a measurement report to the first base station, wherein the measurement report comprises the cell signal quality of an LTE cell in the coverage area of the first base station and the cell signal quality of an NR cell in the coverage area of the second base station. The NR cell configuration information is sent in a system message of the LTE cell, and the terminal performs measurement based on the configuration information and includes a measurement result in a measurement report.
308. The first base station judges whether the cell signal quality of the LTE cell and the cell signal quality of the NR cell meet preset conditions. If the preset condition is satisfied, go to step 309; if the preset condition is not satisfied, step 311 is executed.
In the embodiment of the present application, the cell signal quality may be RSRP. Optionally, an embodiment of the present application provides a preset condition that: RSRP1+ offset > RSRP2, where RSRP1 represents RSRP of an NR cell, RSRP2 represents RSRP of an LTE cell, and a terminal obtains corresponding RSRP1 and RSRP2 by measuring CRS and SSS sent in a system message of the LTE cell, and offset is an offset value. By configuring a proper offset, a threshold for using the NR cell to carry user data can be controlled, and a specific offset value can be adjusted by an operator according to an actual situation and configured by an Operation Administration and Maintenance (OAM) system.
For example, when the terminal measures that RSRP of the NR cell is better than RSRP of the LTE cell when configured to have offset of 0, the first base station selects to carry user data through the NR cell; when configured with offset of 3dB, the terminal measures half the RSRP of the NR cell as that of the LTE cell, and the first base station still chooses to carry user data through the NR cell. That is, the larger the value of offset, the more likely the preset condition is satisfied, so that more user data can be carried through the NR cell.
309. The first base station sends a first RRC reconfiguration message to the terminal and sends the first configuration message to the second base station.
When the cell signal quality of the LTE cell and the cell signal quality of the NR cell satisfy preset conditions, which indicate that the NR cell may provide a relevant data service bearer for the terminal, the first base station sequentially sends first configuration information and a first RRC reconfiguration message to the second base station and the terminal, respectively, where the first configuration information is used to instruct the second base station to establish a SRB3 and a DRB2 for the terminal, the first RRC reconfiguration message is used to enable the terminal to know that the first base station configures the NR cell under the second base station as a secondary cell PSCell of the first base station, and the first RRC reconfiguration message includes a cell Identifier (Identifier, ID) of the NR cell.
310. The second base station establishes SRBs 3 and DRBs 2 for the terminal.
The second base station receives first configuration information sent by the first base station through the scheduler, and when a new service request is initiated on the terminal (for example, a PDU session is initiated or a new DRB is established), the second base station establishes an SRB3 and a DRB2 for the terminal according to the first configuration information, where the SRB3 is mainly used for management, measurement configuration, physical layer configuration, and reconfiguration of a Packet Data Convergence Protocol (PDCP) and the like of the second base station.
311. The first base station establishes a DRB1 for the terminal.
When the cell signal quality of the LTE cell and the cell signal quality of the NR cell do not satisfy the preset condition, indicating that the NR cell does not comply with the requirement of providing the SRB3 and the DRB2 for the terminal, the first base station establishes a DRB1 for the terminal.
Further, if the first base station detects NAS message transmission, the first base station establishes an SRB2 for the terminal, and conversely, if the first base station does not detect NAS message transmission, the first base station establishes an SRB1 for the terminal.
In the embodiment of the present application, the first base station and the second base station serve as a radio side, and a bearer correspondence relationship between the radio side and a terminal and a core network is shown in fig. 4, where there is no substantial difference between DRB1 and DRB2, and the radio side and the DRB are only used as data service bearers provided for the terminal by the LTE cell and the NR cell, respectively.
312. The terminal periodically detects the cell signal quality of the LTE cell and the cell signal quality of the NR cell.
When the terminal moves or the wireless signal changes due to factors such as environmental shielding, the terminal can recognize the change of the channel condition in time by periodically detecting the cell signal quality of the LTE cell and the cell signal quality of the NR cell, update the content of the measurement report and send the measurement report to the first base station.
Optionally, in the reporting process of the measurement report, the terminal may report the measurement report to the first base station periodically, or may report to the first base station in an event-triggered manner (for example, channel condition change, etc.), which is not limited in this application.
313. And if the cell signal quality of the LTE cell and the cell signal quality of the NR cell do not meet the preset conditions, the first base station sends a second RRC reconfiguration message to the terminal and sends second configuration information to the second base station.
If the first base station determines that the cell signal quality of the LTE cell and the cell signal quality of the NR cell in the measurement report reported by the terminal do not satisfy the preset condition, that is, RSRP1+ offset < RSRP2 indicates that the NR cell does not satisfy the requirement for providing a data service bearer for the terminal, the first base station sequentially sends second configuration information and a second RRC reconfiguration message to the second base station and the terminal, respectively, where the second configuration information is used to instruct the second base station to release an RRC connection between the second base station and the terminal, and the second RRC reconfiguration message is used to enable the terminal to know that the first base station will establish DRB1 for the terminal.
314. And the second base station receives the second configuration information sent by the first base station.
The second configuration information is used for instructing the second base station to release the RRC connection between the second base station and the terminal.
315. And the second base station releases the RRC connection between the second base station and the terminal according to the second configuration information.
And the second base station receives the second configuration information sent by the first base station and releases the RRC connection between the second base station and the terminal according to the second configuration information.
The embodiment of the application provides a system dual-connection scheduling strategy, when a first base station determines that a terminal does not have a function of supporting LTE-NR dual transmission, the first base station receives a measurement report reported by the terminal, wherein the measurement report includes cell signal quality of the LTE cell and cell signal quality of the NR cell, and the LTE cell and the NR cell are respectively the cells under the coverage of the first base station and the second base station, the first base station judges whether the cell signal quality of the LTE cell and the cell signal quality of the NR cell meet the preset conditions or not, if the preset conditions are met, the first base station issues a radio resource control, RRC1, reconfiguration message to the terminal, and sends the first configuration information to the second base station, the first configuration information is used for indicating the second base station to establish SRBs 3 and DRBs 2 for the terminal, and the first RRC reconfiguration message is used for enabling the terminal to know that the first base station configures the NR cell as the PSCell of the first base station; if the preset condition is not met, the first base station establishes a DRB1 for the terminal. According to the scheme provided by the application, when the preset condition is met for the terminal which does not have the function of supporting LTE-NR double-transmission, the relevant data information of the terminal is borne by the NR cell, and when the preset condition is not met, the relevant information of the terminal falls back to the LTE cell for transmission, and meanwhile, an operator can effectively control the threshold for bearing the terminal data by the NR cell by setting a proper offset value, so that the overall spectrum utilization rate of the system is improved in a controllable and configurable mode on the premise of not influencing terminal experience.
The above-mentioned scheme provided by the embodiment of the present application is introduced mainly from the perspective of interaction between network elements. It is to be understood that each network element, for example, the first base station, the second base station, etc., includes a corresponding hardware structure and/or software module for performing each function in order to implement the above functions. Those of skill in the art would readily appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as hardware or combinations of hardware and computer software. Whether a function is performed as hardware or computer software drives hardware depends upon the particular application and design constraints imposed on the solution. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiment of the present application, the first base station and the like may be divided into functional modules according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.
In the case of dividing the functional modules according to the respective functions, fig. 5 shows a possible structural diagram of the first base station according to the foregoing embodiment, and the first base station 50 includes: determining section 501, receiving section 502, judging section 503, transmitting section 504, and processing section 505. The determining unit 501 is configured to support the first base station to perform the process 201 in fig. 2, the process 303 in fig. 3; the receiving unit 502 is configured to support the first base station to perform the process 201 in fig. 2, 301, 305, 307 in fig. 3; the determining unit 503 is configured to support the first base station to perform the process 202 in fig. 2, the processes 302 and 308 in fig. 3; the sending unit 504 is configured to support the first base station to perform the process 203 in fig. 2, the processes 309 and 313 in fig. 3; the processing unit 505 is configured to support the first base station to perform the process 204 in fig. 2, and the processes 304, 306, 310, 311 in fig. 3. All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.
In case of an integrated unit, fig. 6 shows a possible schematic structure of the first base station involved in the above embodiments. For example, processing module 601 is used to support the first base station in performing processes 201, 202, and 204 in fig. 2, processes 302, 303, 304, 306, 308, 311 in fig. 3, and/or other processes for the techniques described herein. The communication module 602 is configured to support the first base station to perform the processes 201 and 203 in fig. 2, and the processes 305, 307, 309 and 313 in fig. 3, and the first base station communicates with other network entities, for example, the functional modules or the network entities shown in fig. 1, fig. 8 and fig. 9. The storage module 603 is used to store program codes and data of the first base station.
The Processing module 601 may be a Processor or a controller, and may be, for example, a Central Processing Unit (CPU), a general-purpose Processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The communication module 602 may be a transceiver, a transceiving circuit or a communication interface, etc.
Referring to fig. 7, the first base station 70 includes: a transceiver 701, a processor 702, a memory 703, and a bus 704. The transceiver 701, the processor 702 and the memory 703 are connected to each other by a bus 704; the bus 704 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 7, but this is not intended to represent only one bus or type of bus.
In the embodiment of the present application, the second base station and the like may be divided into functional modules according to the above method example, for example, each functional module may be divided corresponding to each function, or two or more functions may be integrated into one processing module. The integrated module can be realized in a hardware mode, and can also be realized in a software functional module mode. It should be noted that, in the embodiment of the present application, the division of the module is schematic, and is only one logic function division, and there may be another division manner in actual implementation.
In the case of dividing the functional modules according to the respective functions, fig. 8 shows a possible structural diagram of the second base station in the above embodiment, and the second base station 80 includes: a receiving unit 801 and a processing unit 802. The receiving unit 801 is configured to support the second base station to perform the processes 309 and 314 in fig. 3; the processing unit 802 is configured to support the second base station to perform the procedures 310, 315 in fig. 3. All relevant contents of each step related to the above method embodiment may be referred to the functional description of the corresponding functional module, and are not described herein again.
In case of using integrated units, fig. 9 shows a possible schematic structure of the second base station involved in the above embodiments. For example, processing module 901 is used to enable the second base station to perform processes 310, 315 of fig. 3, and/or other processes for the techniques described herein. The communication module 902 is configured to support the second base station to perform the processes 309 and 314 in fig. 3, and the second base station communicates with other network entities, for example, the functional modules or network entities shown in fig. 1, fig. 5, and fig. 6. The storage module 903 is used to store program codes and data of the second base station.
The Processing module 901 may be a Processor or a controller, such as a Central Processing Unit (CPU), a general-purpose Processor, a Digital Signal Processor (DSP), an Application-Specific Integrated Circuit (ASIC), a Field Programmable Gate Array (FPGA) or other Programmable logic device, a transistor logic device, a hardware component, or any combination thereof. Which may implement or perform the various illustrative logical blocks, modules, and circuits described in connection with the disclosure. The processor may also be a combination of computing functions, e.g., comprising one or more microprocessors, DSPs, and microprocessors, among others. The communication module 902 may be a transceiver, a transceiving circuit or a communication interface, etc.
Referring to fig. 10, the second base station 100 includes: a transceiver 1001, a processor 1002, a memory 1003, and a bus 1004. Wherein, the transceiver 1001, the processor 1002 and the memory 1003 are connected to each other by a bus 1004; the bus 1004 may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown in FIG. 10, but this is not intended to represent only one bus or type of bus.
The steps of a method or algorithm described in connection with the disclosure herein may be embodied in hardware or in software instructions executed by a processor. The software instructions may be comprised of corresponding software modules, which may be stored in random access memory
(Random Access Memory, RAM), flash Memory, Read Only Memory (ROM), Erasable Programmable Read Only Memory (EPROM), Electrically Erasable Programmable Read Only Memory (EEPROM), registers, a hard disk, a removable hard disk, a compact disc Read Only Memory (CD-ROM), or any other form of storage medium known in the art. An exemplary storage medium is coupled to the processor such the processor can read information from, and write information to, the storage medium. Of course, the storage medium may also be integral to the processor. The processor and the storage medium may reside in an ASIC. Additionally, the ASIC may reside in a core network interface device. Of course, the processor and the storage medium may reside as discrete components in a core network interface device.
Those skilled in the art will recognize that in one or more of the examples described above, the functions described herein may be implemented in hardware, software, firmware, or any combination thereof. When implemented in software, the functions may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a general purpose or special purpose computer.
The above description is only an embodiment of the present application, but the scope of the present application is not limited thereto, and any changes or substitutions within the technical scope of the present disclosure should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (8)
1. A system dual-connection scheduling method is characterized by comprising the following steps:
when a first base station determines that a terminal does not have a function of supporting long term evolution technology-new air interface LTE-NR dual transmission, receiving a measurement report reported by the terminal, wherein the measurement report comprises cell signal quality of an LTE cell and cell signal quality of an NR cell, the LTE cell is a cell under the coverage of the first base station, and the NR cell is a cell under the coverage of a second base station;
the first base station judges whether the cell signal quality of the LTE cell and the cell signal quality of the NR cell meet preset conditions or not;
if the preset condition is met, the first base station issues a first Radio Resource Control (RRC) reconfiguration message to the terminal, and sends first configuration information to the second base station, wherein the first configuration information is used for indicating the second base station to establish a signaling radio bearer (SRB 3) and a data radio bearer (DRB 2) for the terminal, and the first RRC reconfiguration message is used for enabling the terminal to know that the NR cell is configured as a secondary cell (PSCell) of the first base station by the first base station;
and if the preset condition is not met, the first base station establishes a DRB1 for the terminal.
2. The system dual-connection scheduling method of claim 1, wherein the cell signal quality is Reference Signal Received Power (RSRP), the RSRP of the LTE cell is obtained by the terminal measuring Cell Reference Signal (CRS), and the RSRP of the NR cell is obtained by the terminal measuring Secondary Synchronization Signal (SSS);
the preset conditions are as follows: RSRP1+ offset > RSRP2, wherein the offset is an offset value, the RSRP1 is the RSRP of the NR cell, and the RSRP2 is the RSRP of the LTE cell.
3. The system dual connectivity scheduling method of claim 1 or 2, wherein the method further comprises:
if the terminal is in an RRC idle state, the first base station establishes a default SRB0 for the terminal;
if the terminal is in an RRC connected state, the first base station establishes an SRB1 for the terminal when the preset condition is satisfied, if the preset condition is not satisfied, the first base station detects non-access stratum NAS message transmission, the first base station establishes an SRB2 for the terminal, and if the NAS message transmission is not detected, the first base station establishes an SRB1 for the terminal.
4. The system dual connection scheduling method of claim 1, wherein the method further comprises:
after the measurement report is updated, if the cell signal quality of the LTE cell and the cell signal quality of the NR cell do not satisfy the preset condition, the first base station sends a second RRC reconfiguration message to the terminal, and sends second configuration information to the second base station, where the second configuration information is used to instruct the second base station to release RRC connection between the second base station and the terminal, and the second RRC reconfiguration message is used to enable the terminal to know that the first base station establishes DRB1 for the terminal.
5. A system dual connectivity scheduling apparatus disposed in a first base station, comprising:
the determining unit is used for determining that the terminal does not have the function of supporting long term evolution technology-new air interface LTE-NR dual transmission;
a receiving unit, configured to receive a measurement report reported by the terminal, where the measurement report includes cell signal quality of an LTE cell and cell signal quality of an NR cell, where the LTE cell is a cell under a coverage of the first base station, and the NR cell is a cell under a coverage of a second base station;
a judging unit, configured to judge whether cell signal quality of the LTE cell and cell signal quality of the NR cell satisfy a preset condition;
a sending unit, configured to issue a first radio resource control, RRC, reconfiguration message to the terminal when the preset condition is met, and send first configuration information to the second base station, where the first configuration information is used to instruct the second base station to establish a signaling radio bearer SRB3 and a data radio bearer DRB2 for the terminal, and the first RRC reconfiguration message is used to enable the terminal to know that the first base station configures the NR cell as a secondary cell PSCell of the first base station;
and the processing unit is used for establishing a DRB1 for the terminal when the preset condition is not met.
6. The system dual-connection scheduling device of claim 5, wherein the cell signal quality is Reference Signal Received Power (RSRP), the RSRP of the LTE cell is obtained by the terminal measuring Cell Reference Signal (CRS), and the RSRP of the NR cell is obtained by the terminal measuring Secondary Synchronization Signal (SSS);
the preset conditions are as follows: RSRP1+ offset > RSRP2, wherein the offset is an offset value, the RSRP1 is the RSRP of the NR cell, and the RSRP2 is the RSRP of the LTE cell.
7. The system dual connection scheduling apparatus of claim 5 or 6,
if the terminal is in an RRC idle state, the processing unit establishes a default SRB0 for the terminal; if the terminal is in an RRC connected state, the processing unit establishes an SRB1 for the terminal when the preset condition is satisfied, if the preset condition is not satisfied, the processing unit establishes an SRB2 for the terminal when the apparatus detects non-access stratum NAS message transmission, and if the NAS message transmission is not detected, the apparatus establishes an SRB1 for the terminal.
8. The system dual connection scheduler of claim 5,
after the measurement report is updated, if the cell signal quality of the LTE cell and the cell signal quality of the NR cell do not satisfy the preset condition, the sending unit is further configured to send a second RRC reconfiguration message to the terminal, and send second configuration information to the second base station, where the second configuration information is used to instruct the second base station to release RRC connection between the second base station and the terminal, and the second RRC reconfiguration message is used to enable the terminal to know that the first base station establishes DRB1 for the terminal.
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