CN107770795B - Method and device for deactivating secondary cell in cross-base-station carrier aggregation system - Google Patents
Method and device for deactivating secondary cell in cross-base-station carrier aggregation system Download PDFInfo
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- CN107770795B CN107770795B CN201610676883.7A CN201610676883A CN107770795B CN 107770795 B CN107770795 B CN 107770795B CN 201610676883 A CN201610676883 A CN 201610676883A CN 107770795 B CN107770795 B CN 107770795B
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Abstract
The invention discloses a method and a device for deactivating an auxiliary cell in a cross-base-station carrier aggregation system. In the invention, a main cell in cross-base station carrier aggregation determines an auxiliary cell needing to be deactivated, and a main service base station where the main cell is located sends an auxiliary cell deactivation indication to an auxiliary service base station where the auxiliary cell is located so as to indicate the auxiliary cell to deactivate. In another embodiment, a secondary cell in cross-base-station carrier aggregation determines to deactivate, and a secondary serving base station where the secondary cell is located sends a secondary cell deactivation indication to a base station where a primary cell in cross-base-station carrier aggregation is located, so as to indicate that a carrier aggregation state of the secondary cell is set to a deactivation state, and the secondary cell deactivates. The invention realizes the secondary cell deactivation process triggered by the primary cell or the secondary cell in the cross-base station carrier aggregation.
Description
Technical Field
The present invention relates to the field of communications technologies, and in particular, to a method and an apparatus for deactivating a secondary cell in a cross-base-station carrier aggregation system.
Background
With the popularization of intelligent terminals, the service requirements of a mobile communication network increase in a geometric level, while spectrum resources are limited and non-renewable resources, the spectrum resources of a Long Term Evolution (LTE) system are relatively discrete and lack large-bandwidth resources, continuous or discrete carriers can be aggregated together by a carrier aggregation technology, the large-bandwidth requirements of the LTE system are met, and the peak rate of a terminal (UE) can be greatly increased.
The 3GPP LTE-a defines a protocol standard related to intra-site carrier aggregation, but in an actual networking scenario, the UE may be located in an overlapping coverage range of two base stations, instead of an overlapping coverage range of multiple carriers of one base station, which makes the UE unable to utilize an intra-site carrier aggregation technology to increase the rate, but needs the UE to aggregate resources of the two base stations, and increases the rate by adopting a cross-base-station carrier aggregation method. The cross-base-station carrier aggregation technology means that a cell which performs data transmission for the same UE at the same time can belong to different base stations, so that the working bandwidth of the UE can still be increased by the carrier aggregation technology in a network environment overlapped and covered by different base stations.
There is no corresponding method in the existing LTE-Advanced protocol to describe how to interact with the deactivation indication of the secondary cell in the cross-base station carrier aggregation system.
Disclosure of Invention
The embodiment of the invention provides a method and a device for deactivating an auxiliary cell in a cross-base-station carrier aggregation system, which are used for deactivating the auxiliary cell in the cross-base-station carrier aggregation system.
The method for deactivating the auxiliary cell in the cross-base-station carrier aggregation system provided by the embodiment of the invention is applied to the cross-base-station carrier aggregation system comprising a main service base station and an auxiliary service base station, and comprises the following steps:
determining a secondary cell needing to be deactivated by a primary cell in cross-base station carrier aggregation; and the main service base station where the main cell is located sends a secondary cell deactivation indication to the secondary service base station where the secondary cell is located, wherein the secondary cell deactivation indication is used for indicating the secondary cell to deactivate.
Optionally, determining a secondary cell that needs to be deactivated by a primary cell in cross-base station carrier aggregation includes: and the primary cell in the cross-base-station carrier aggregation determines the auxiliary cell needing to be deactivated according to the interface time delay between the primary service base station where the primary cell is located and the auxiliary service base station where the auxiliary cell is located or the carrier aggregation gain between the primary cell and the auxiliary cell.
Further, the determining, by the primary cell in the cross-base-station carrier aggregation, the secondary cell to be deactivated according to an interface delay between the primary serving base station where the primary cell is located and the secondary serving base station where the secondary cell is located includes: and periodically detecting the interface delay between the main service base station where the main cell is located and the auxiliary service base station where the auxiliary cell is located by the main cell in the cross-base-station carrier aggregation, and determining the detected auxiliary cell as the auxiliary cell needing to be deactivated when the detected interface delay is greater than a set threshold.
Optionally, the determining, by the primary cell in the cross-base station carrier aggregation, the secondary cell that needs to be deactivated according to a carrier aggregation gain between the primary cell and the secondary cell includes: and periodically detecting the carrier aggregation gain between the primary cell and the secondary cell in the cross-base-station carrier aggregation, and determining the detected secondary cell as the secondary cell needing to be deactivated when the detected carrier aggregation gain between the primary cell and the secondary cell is lower than a set threshold.
Optionally, the secondary cell deactivation indication includes a user identifier and a cell identifier of the secondary cell. Further, the secondary cell deactivation indication further includes a deactivation reason.
The base station provided by the embodiment of the invention is applied to a cross-base-station carrier aggregation system comprising a main service base station and an auxiliary service base station, wherein the base station is the main service base station and comprises:
a determining module, configured to determine a secondary cell that needs to be deactivated;
an indication module, configured to send a secondary cell deactivation indication to a secondary serving base station where the secondary cell is located, where the secondary cell deactivation indication is used to indicate that the secondary cell is deactivated.
Optionally, the determining module is specifically configured to: and determining the auxiliary cell to be deactivated according to the interface time delay between the main service base station where the main cell is located and the auxiliary service base station where the auxiliary cell is located or the carrier aggregation gain between the main cell and the auxiliary cell.
Further, the determining module is specifically configured to: and periodically detecting the interface delay between the main service base station where the main cell is located and the auxiliary service base station where the auxiliary cell is located, and determining the detected auxiliary cell as the auxiliary cell needing to be deactivated when the detected interface delay is greater than a set threshold.
Optionally, the determining module is specifically configured to: and periodically detecting the carrier aggregation gain between the detected secondary cell and the secondary cell, and determining the detected secondary cell as the secondary cell needing to be deactivated when the detected carrier aggregation gain between the detected secondary cell and the secondary cell is lower than a set threshold.
The embodiment of the invention provides a device for communication, which comprises: a transceiver, a processor, and a memory;
the memory to store computer program instructions;
the processor, coupled to the memory, is configured to read the computer program instructions stored in the memory and execute the method described above.
In the above embodiment of the present invention, the primary cell in the cross-base-station carrier aggregation determines the secondary cell that needs to be deactivated, and the primary serving base station where the primary cell is located sends the secondary cell deactivation indication to the secondary serving base station where the secondary cell is located, so as to indicate the secondary cell to deactivate, thereby implementing the secondary cell deactivation process triggered by the primary cell in the cross-base-station carrier aggregation.
The invention further provides a method and a device for deactivating the secondary cell in the cross-base-station carrier aggregation system, which are used for deactivating the secondary cell in the cross-base-station carrier aggregation system.
Another embodiment of the present invention provides a method for deactivating an auxiliary cell in a cross-base-station carrier aggregation system, which is applied to a cross-base-station carrier aggregation system including a primary serving base station and an auxiliary serving base station, and includes:
determining deactivation of a secondary cell in cross-base station carrier aggregation;
the auxiliary serving base station of the auxiliary cell sends an auxiliary cell deactivation indication to the base station of the main cell in the cross-base-station carrier aggregation, wherein the auxiliary cell deactivation indication is used for indicating that the carrier aggregation state of the auxiliary cell is set to be a deactivation state;
and the secondary cell is deactivated.
Optionally, the secondary cell in the cross-base station carrier aggregation determines whether deactivation is required according to whether an implicit deactivation condition is met or according to a cell load.
Further, after the secondary serving base station where the secondary cell is located sends the secondary cell deactivation indication, the method further includes: receiving a secondary cell deactivation confirmation sent by a primary service base station where the primary cell is located;
the secondary cell is deactivated, including: and the secondary cell deactivates after receiving the deactivation confirmation of the secondary cell.
Optionally, the secondary cell deactivation confirmation is sent when the primary serving base station where the primary cell is located confirms that the deactivation reason of the secondary cell is not satisfied with an implicit deactivation condition.
Optionally, the secondary cell deactivation indication includes a user identifier and a cell identifier of the secondary cell.
Optionally, the secondary cell deactivation indication further includes a deactivation reason.
Another embodiment of the present invention provides a base station, which is applied to a cross-base-station carrier aggregation system including a main serving base station and an auxiliary serving base station, where the base station is the auxiliary serving base station, and the base station includes:
a determination module to determine deactivation;
an indication module, configured to send a secondary cell deactivation indication to a base station where a primary cell in the cross-base station carrier aggregation is located, where the secondary cell deactivation indication is used to indicate that the secondary cell is deactivated;
and the deactivation module is used for carrying out deactivation.
Optionally, the determining module is specifically configured to: and determining whether to need deactivation according to whether an implicit deactivation condition is met or not or according to the cell load.
Optionally, the deactivation module is specifically configured to: and deactivating after receiving a secondary cell deactivation confirmation sent by the main service base station where the main cell is located according to the cell activation indication.
Optionally, the secondary cell deactivation confirmation is sent when the primary serving base station where the primary cell is located confirms that the deactivation reason of the secondary cell is not satisfied with an implicit deactivation condition.
Another embodiment of the present invention provides an apparatus for communication, including: a transceiver, a processor, and a memory;
the memory to store computer program instructions;
the processor, coupled to the memory, is configured to read the computer program instructions stored in the memory and execute the method described above.
In the above embodiment of the present invention, after determining to deactivate the secondary cell in the cross-base-station carrier aggregation, on one hand, the secondary serving base station where the secondary cell is located sends a secondary cell deactivation instruction to the base station where the primary cell in the cross-base-station carrier aggregation is located, so as to instruct to set the secondary cell to be deactivated, and on the other hand, the secondary cell deactivates, thereby implementing a secondary cell deactivation process triggered by the secondary cell in the cross-base-station carrier aggregation.
Drawings
Fig. 1 is a block diagram of a secondary cell deactivation triggered by a primary cell according to an embodiment of the present invention;
fig. 2 and fig. 3 are diagrams of deactivation signaling based on the secondary cell of fig. 1, respectively;
fig. 4 is a block diagram of secondary cell deactivation triggered by a secondary cell according to an embodiment of the present invention;
fig. 5 and fig. 6 are diagrams of the secondary cell deactivation signaling based on fig. 4, respectively;
fig. 7, fig. 8, fig. 9, and fig. 10 are schematic structural diagrams of a base station according to an embodiment of the present invention.
Detailed Description
The embodiment of the invention provides a method for deactivating an auxiliary cell in a cross-base-station carrier aggregation system, wherein the deactivation process of the auxiliary cell can be triggered by a main cell and can also be triggered by the auxiliary cell.
In the embodiment of the present invention, cross base station (eNB) carrier aggregation configured for a terminal includes a primary cell (PCell) and one or more secondary cells (scells), where an eNB in which the PCell is located is denoted as a PCell eNB (primary serving base station) and an eNB in which the SCell is located is denoted as an SCell eNB (secondary serving base station).
Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.
Referring to fig. 1, a block diagram of SCell deactivation triggered by a PCell in cross base station carrier aggregation is provided in an embodiment of the present invention. The flow describes a process in which the PCell eNB indicates SCell deactivation to the SCell eNB, which may include the following steps:
step 101: the PCell determines the SCell that needs to be deactivated.
Wherein, the PCell and SCell in this step are primary cell and secondary cell in cross base station carrier aggregation.
The PCell may determine the secondary cell that needs to be deactivated according to an X2 interface delay between a PCell eNB where the PCell is located and an SCell eNB where the SCell is located or an inter-station carrier aggregation gain between the PCell and the SCell. The X2 interface refers to an interface for information interaction between two enbs.
Further, after the PCell determines the SCell that needs to be deactivated, the SCell that needs to be deactivated is set to a deactivated state.
Step 102: and the PCell eNB where the PCell is located sends a secondary cell deactivation indication to the SCell eNB where the SCell needing to be deactivated is located, wherein the secondary cell deactivation indication is used for indicating the SCell needing to be deactivated.
The secondary cell deactivation indication may be sent over an X2 interface.
The secondary cell deactivation indication sent by the PCell may include a UE identity, a cell identity of an SCell that needs to be deactivated, and further may include information such as a reason for SCell deactivation. Reasons for SCell deactivation may include, but are not limited to: the time delay of the X2 interface is larger than a set threshold, or the carrier aggregation gain between stations is lower than the set threshold.
Step 103: and after the SCell receives the deactivation indication of the secondary cell, removing relevant information of Radio Bearer (RB for short) of corresponding UE on the SCell.
The flow shown in fig. 1 is described in detail below with reference to fig. 2 and 3, respectively. Fig. 2 exemplarily shows a signaling interaction diagram of triggering an SCell deactivation process by a PCell according to an X2 interface latency, and fig. 2 exemplarily shows a signaling interaction diagram of triggering an SCell deactivation process by a PCell according to an inter-station carrier aggregation gain.
As shown in fig. 2, the process of triggering SCell deactivation by PCell according to X2 interface latency may include the following steps:
step 201: the PCell configures an SCell (i.e., inter-station SCell) in cross base station carrier aggregation for the UE and activates the SCell. The PCell and the SCell in the process are primary cells and secondary cells in cross-base-station carrier aggregation configured for the UE, and a PCell eNB where the PCell is located and an SCell eNB where the SCell is located are different base stations.
Step 202: the PCell periodically detects the X2 interface delay between PCell eNB and SCell eNB. When the X2 interface delay between the PCell eNB and the SCell eNB is larger than a set threshold, the PCell judges that the SCell needs to be deactivated.
Step 203: the PCell eNB sets the SCell in a deactivated state, and transmits a control element (MAC CE) of a medium access control layer to inform the UE to deactivate the SCell.
Step 204: the PCell eNB sends a PCell-triggered SCell deactivation indication to the SCell eNB over the X2 interface to indicate deactivation of the SCell. The UE identity, the SCell identity, and the SCell deactivation reason are carried in the indication because the X2 interface latency is large.
Step 205: and after the SCell eNB receives the SCell deactivation indication, clearing the related information of all RBs of the UE on the SCell.
As shown in fig. 3, the process of triggering SCell deactivation by PCell according to inter-station carrier aggregation gain may include the following steps:
step 301: the PCell configures an SCell in cross base station carrier aggregation for the UE and activates the SCell. The PCell and the SCell in the process are primary cells and secondary cells in cross-base-station carrier aggregation configured for the UE, and a PCell eNB where the PCell is located and an SCell eNB where the SCell is located are different base stations.
Step 302: the PCell periodically detects a carrier aggregation gain between the PCell eNB and the SCell eNB. And when the carrier aggregation gain between the PCell eNB and the SCell eNB is lower than a set threshold, the PCell judges that the SCell needs to be deactivated.
Step 303: and the PCell eNB sets the SCell to be in a deactivation state, and sends the MAC CE to inform the UE to deactivate the SCell.
Step 304: and the PCell eNB sends a PCell triggered SCell deactivation indication to the SCell eNB through an X2 interface to indicate that the SCell is deactivated, wherein the indication carries the UE identification, the SCell identification and the SCell deactivation reason because the carrier aggregation gain is low.
Step 305: and after the SCell eNB receives the SCell deactivation indication, clearing the related information of all RBs of the UE on the SCell so as to save the space of the SCell eNB.
As can be seen from the above description, the PCell eNB may determine that it is no longer suitable for the SCell to transmit data due to factors such as a large interaction delay of the X2 interface or a low carrier aggregation gain, so as to deactivate the SCell, thereby implementing a secondary cell deactivation process triggered by a primary cell in cross-base station carrier aggregation. By adopting the embodiment, when the service is not finished, the SCell deactivation information can be interacted between the PCell eNB and the SCell eNB in the cross-base station carrier aggregation system.
Referring to fig. 4, a block diagram of SCell deactivation triggered by SCell in cross base station carrier aggregation is provided for further embodiments of the present invention. The flow describes a procedure where the SCell eNB requests SCell deactivation from the PCell eNB. The PCell and SCell in this flow are primary and secondary cells in cross base station carrier aggregation. The route may include the steps of:
step 401: the SCell determines deactivation.
In this step, the SCell may determine that the SCell needs to be deactivated according to whether an implicit deactivation condition is met or according to the cell load.
Step 403: and the SCell eNB in which the SCell is located sends a secondary cell deactivation indication to the PCell eNB so as to indicate the PCell to set the carrier aggregation state of the SCell to be a deactivation state.
The secondary cell deactivation indication may be sent over an X2 interface. The X2 interface refers to an interface for information interaction between two enbs.
The secondary cell deactivation indication sent by the SCell may include a UE identity, a cell identity of the SCell that needs to be deactivated, and further, may also include information such as a reason for SCell deactivation. Reasons for SCell deactivation may include, but are not limited to: and the implicit deactivation condition is met or the cell load is greater than a set threshold.
Step 405: the SCell is deactivated.
In this step, the SCell clears the relevant information of the RB on the SCell for the corresponding UE.
Further, in step 401, when the SCell determines that its load is high (for example, higher than a set threshold), the intra-station secondary cell using the SCell as the primary cell may be activated first, so as to perform load balancing. If the Scell is still loaded with a larger load after the above processing, in step 403, the Scell eNB where the Scell is located sends a secondary cell deactivation indication to the PCell eNB.
Further, after step 403, the following steps may also be included:
step 404: and after receiving the secondary cell deactivation indication sent by the SCell eNB, the PCell eNB sends a secondary cell deactivation confirmation to the SCell eNB.
The secondary cell activation acknowledgement may include a UE identity and a cell identity of the SCell.
Accordingly, in step 404, after receiving the secondary cell deactivation acknowledgement, the SCell eNB performs deactivation processing.
Optionally, in step 403, after receiving the secondary cell deactivation indication sent by the SCell eNB, the PCell eNB sends a secondary cell deactivation acknowledgement when it is determined that the deactivation reason is not the deactivation reason that satisfies the implicit deactivation condition according to the deactivation reason carried in the secondary cell deactivation indication, otherwise the secondary cell deactivation acknowledgement may not be sent.
The flow shown in fig. 4 will be described in detail below with reference to fig. 5 and 6, respectively. Fig. 5 exemplarily shows a signaling interaction diagram of an SCell triggering an SCell deactivation process according to a deactivation implicit decision bar, and fig. 6 exemplarily shows a signaling interaction diagram of an SCell triggering an SCell deactivation process according to a cell load.
As shown in fig. 5, triggering the SCell deactivation process according to the deactivation implicit decision bar by the SCell may include the following steps:
step 501: the PCell configures an SCell in cross base station carrier aggregation for the UE and activates the SCell. The PCell and the SCell in the process are primary cells and secondary cells in cross-base-station carrier aggregation configured for the UE, and a PCell eNB where the PCell is located and an SCell eNB where the SCell is located are different base stations.
Step 502: and the SCell makes an implicit deactivation decision of the SCell.
The SCell home base station may maintain a deactivation timer (referred to as sCellDeactivationTimer) for each UE that uses the station as an SCell, start or restart the SCell corresponding SCell deactivationtimer when the SCell is activated, and restart the corresponding SCell deactivationtimer when a scheduling grant Physical Downlink Control Channel (PDCCH) on the SCell is allocated to the SCell home UE.
When the SCell de activationtimer configured for one UE times out, it is determined that the SCell deactivation needs to be performed for the UE.
Step 503: and the SCell eNB in which the SCell is located sends an SCell deactivation indication triggered by the SCell to the PCell eNB through an X2 interface so as to request to deactivate the SCell (namely, request the PCell to set the carrier aggregation state of the SCell to be in a deactivation state), wherein the indication carries the UE identification, the SCell identification and the SCell deactivation reason, and is implicitly deactivated by the SCell.
Step 504: and after receiving the SCell deactivation indication, the PCell sets the SCell to be in a deactivation state. Because the SCell deactivation reason is implicit deactivation, the PCell may not need to send a MAC CE to inform the UE to deactivate the SCell.
Step 505: and the PCell eNB sends a secondary cell deactivation confirmation through an X2 interface, wherein the message carries the UE identification, the SCell identification and the like.
Step 506: and after the SCell eNB receives the secondary cell deactivation confirmation, clearing the related information of all RBs of the UE on the SCell.
As can be seen from the above description, when the UE is not scheduled for a long time, the UE deactivates the SCell based on the SCell deactivation timer, and the UE does not monitor the SCell after the SCell is deactivated. At this time, the SCell determines whether the UE has deactivated the SCell. If the UE is judged to be deactivated, the SCell synchronously deactivates the SCell, and data of the UE cannot be continuously transmitted on the SCell. After the SCell eNB determines that the UE has deactivated the SCell, the PCell eNB needs to be notified in time, and then the PCell eNB no longer transmits data on the SCell.
As shown in fig. 6, the process of triggering SCell deactivation by SCell according to cell load may include the following steps:
step 601: the PCell configures an SCell in cross base station carrier aggregation for the UE and activates the SCell. The PCell and the SCell in the process are primary cells and secondary cells in cross-base-station carrier aggregation configured for the UE, and a PCell eNB where the PCell is located and an SCell eNB where the SCell is located are different base stations.
Step 602: the SCell makes load balancing decisions periodically. And when the load of the cell is higher than a set threshold, determining that the cell needs to trigger load balancing.
Step 603: the Scell determines load balancing target users, executes an activation process of the SCell in the station aiming at the load balancing target users, and realizes load balancing by activating the SCell in the station of the UE to share the load of the cell. Wherein, the SCell may select a load balancing target user according to the following conditions: and taking the SCell as a PCell of carrier aggregation, and configuring the UE which does not activate the SCell in the station.
For example, cell 1 is at eNB1, and cell 2 and cell 3 belong to the same base station eNB 2. The UEa in the cell 1 configures cross base station carrier aggregation, wherein the cell 1 is a PCell in the cross base station carrier aggregation, and the cell 2 is an SCell in the cross base station carrier aggregation. UEb in cell 2 configures intra-station carrier aggregation, where cell 2 is a PCell in the intra-station carrier aggregation, and cell 3 is an SCell in the intra-station carrier aggregation and has not yet been activated. The cell 2 is used as an SCell in cross-base station carrier aggregation to carry out cell load detection, and when the cell load is detected to be greater than a set load balancing threshold, the following selection process of a load balancing target user is executed:
and if so, selecting the UE as a load balancing target user. Such as UEb in this example, is selected as the load balancing target user.
Further, if the target users with balanced load are selected by adopting the above method and after the intra-station scells are activated for the users, the load of the cell is less than or equal to the set threshold, and then the load balancing process is ended; if the load of the cell is still greater than the set threshold after the target users with balanced load are selected and the intra-station SCell is activated for these users in the above manner, step 604 is executed.
Further, if the number of load balancing target users selected in the above manner is 0, step 604 is executed.
Step 604: and the SCell selects the UE with the local cell as the SCell in cross-base station carrier aggregation as a load balancing target user.
Step 605: and the SCell sends an SCell deactivation indication to the PCell home eNB of the load balancing target users through an X2 interface, and requests that the cell is not used as an inter-station SCell any more. The indication message carries the UE identity, the SCell identity, and the SCell deactivation reason for load balancing.
Step 606: and after receiving the secondary cell deactivation indication, the PCell sets the SCell in the cross-base station carrier aggregation of the corresponding UE to be in a deactivation state, and sends the MAC CE to inform the corresponding UE to deactivate the SCell.
Step 607: and the PCell eNB sends a secondary cell deactivation confirmation through an X2 interface, wherein the confirmation message carries the UE identification, the SCell identification and the like.
Step 608: and after the SCell eNB receives the secondary cell deactivation confirmation, clearing the related information of all RBs of the UE on the SCell.
As can be seen from the above description, in order to implement cross-base station carrier aggregation, an X2 interface control plane and an X2 interface user plane need to exchange much information/data, carrier aggregation across enbs needs to pay a large cost, and if the load of an SCell is already high, an SCell eNB may request deactivation of the SCell from a PCell eNB in order to reduce the load.
In the above embodiment of the present invention, after determining to deactivate the secondary cell in the cross-base-station carrier aggregation, on one hand, the secondary serving base station where the secondary cell is located sends a secondary cell deactivation instruction to the base station where the primary cell in the cross-base-station carrier aggregation is located, so as to instruct to set the secondary cell to be deactivated, and on the other hand, the secondary cell deactivates, thereby implementing a secondary cell deactivation process triggered by the secondary cell in the cross-base-station carrier aggregation.
Based on the same technical concept, the embodiment of the invention also provides a base station, and the base station can realize the process shown in fig. 1.
As shown in fig. 7, the base station is applied to a cross-base-station carrier aggregation system including a primary serving base station and a secondary serving base station, and the base station as the primary serving base station may include: a determining module 701 and an indicating module 702, wherein:
a determining module 701, configured to determine a secondary cell that needs to be deactivated;
an indicating module 702, configured to send a secondary cell deactivation indication to a secondary serving base station where the secondary cell is located, where the secondary cell deactivation indication is used to indicate that the secondary cell is deactivated.
Optionally, the determining module 701 may be specifically configured to: and determining the auxiliary cell to be deactivated according to the interface time delay between the main service base station where the main cell is located and the auxiliary service base station where the auxiliary cell is located or the carrier aggregation gain between the main cell and the auxiliary cell.
Further, the determining module 701 may be specifically configured to: and periodically detecting the interface delay between the main service base station where the main cell is located and the auxiliary service base station where the auxiliary cell is located, and determining the detected auxiliary cell as the auxiliary cell needing to be deactivated when the detected interface delay is greater than a set threshold.
Optionally, the determining module 701 may be specifically configured to: and periodically detecting the carrier aggregation gain between the main cell and the auxiliary cell for carrying out cross-base station carrier aggregation, and determining the detected auxiliary cell as the auxiliary cell needing to be deactivated when the detected carrier aggregation gain is lower than a set threshold.
Based on the same technical concept, the embodiment of the present invention further provides a base station, and the base station may implement the flow shown in fig. 4.
As shown in fig. 8, the base station is applied to a cross-base-station carrier aggregation system including a primary serving base station and a secondary serving base station, and the base station as the secondary serving base station may include: a determination module 801, an indication module 802, and a deactivation module 803, wherein:
a determining module 801 for determining deactivation;
an indicating module 802, configured to send a secondary cell deactivation indication to a base station where a primary cell in the cross-base station carrier aggregation is located, where the secondary cell deactivation indication is used to indicate that the secondary cell is deactivated;
a deactivation module 803, configured to perform deactivation.
Optionally, the determining module 801 may be specifically configured to: and determining whether to need deactivation according to whether an implicit deactivation condition is met or not or according to the cell load.
Optionally, the deactivation module 803 may be specifically configured to: and deactivating after receiving a secondary cell deactivation confirmation sent by the main service base station where the main cell is located according to the cell activation indication.
Optionally, the secondary cell deactivation confirmation is sent when the primary serving base station where the primary cell is located confirms that the deactivation reason of the secondary cell is not satisfied with an implicit deactivation condition.
Based on the same technical concept, the embodiment of the present invention further provides an apparatus for communication, which may implement the process illustrated in fig. 1.
As shown in fig. 9, the apparatus may be applied to a cross-base-station carrier aggregation system including a primary serving base station and a secondary serving base station, and implements the function of the primary serving base station. The apparatus may include: a processor 901, a memory 902, a transceiver 903, and a bus interface. The processor 901 is responsible for managing a bus architecture and general processing, and the memory 902 may store data used by the processor 901 in performing operations. The transceiver 903 is used for receiving and transmitting data under the control of the processor 901.
The bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by processor 901, and various circuits, represented by memory 902, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 901 is responsible for managing a bus architecture and general processing, and the memory 902 may store data used by the processor 901 in performing operations.
The process disclosed in the embodiment of the present invention may be applied to the processor 901, or implemented by the processor 901. In implementation, the steps of the signal processing flow may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 901. The processor 901 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or any combination thereof that may implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 902, and the processor 901 reads the information in the memory 902, and completes the steps of the signal processing flow in combination with the hardware thereof.
Specifically, the processor 901, configured to read the program in the memory 902, executes the following processes: determining a secondary cell needing to be deactivated, and sending a secondary cell deactivation indication to a secondary serving base station where the secondary cell is located, wherein the secondary cell deactivation indication is used for indicating the secondary cell to be deactivated.
For a specific implementation process of the secondary cell deactivation procedure in the cross-base station carrier aggregation system, reference may be made to the foregoing embodiments, and details are not described here.
Based on the same technical concept, the embodiment of the present invention further provides an apparatus for communication, which may implement the flow illustrated in fig. 4.
As shown in fig. 10, the apparatus may be applied to a cross-base-station carrier aggregation system including a primary serving base station and a secondary serving base station, and implement the function of the secondary serving base station. The apparatus may include:
a processor 1001, a memory 1002, a transceiver 1003, and a bus interface. The processor 1001 is responsible for managing the bus architecture and general processing, and the memory 1002 may store data used by the processor 1001 in performing operations. The transceiver 1003 is used for receiving and transmitting data under the control of the processor 1001.
The bus architecture may include any number of interconnected buses and bridges, with one or more processors, represented by the processor 1001, and various circuits, represented by the memory 1002, being linked together. The bus architecture may also link together various other circuits such as peripherals, voltage regulators, power management circuits, and the like, which are well known in the art, and therefore, will not be described any further herein. The bus interface provides an interface. The processor 1001 is responsible for managing the bus architecture and general processing, and the memory 1002 may store data used by the processor 1001 in performing operations.
The process disclosed in the embodiment of the present invention may be applied to the processor 1001, or implemented by the processor 1001. In implementation, the steps of the signal processing flow may be implemented by integrated logic circuits of hardware or instructions in the form of software in the processor 1001. The processor 1001 may be a general purpose processor, a digital signal processor, an application specific integrated circuit, a field programmable gate array or other programmable logic device, discrete gate or transistor logic, discrete hardware components, or the like that implement or perform the methods, steps, and logic blocks disclosed in embodiments of the present invention. A general purpose processor may be a microprocessor or any conventional processor or the like. The steps of a method disclosed in connection with the embodiments of the present invention may be directly implemented by a hardware processor, or may be implemented by a combination of hardware and software modules in the processor. The software module may be located in ram, flash memory, rom, prom, or eprom, registers, etc. storage media as is well known in the art. The storage medium is located in the memory 1002, and the processor 1001 reads the information in the memory 1002 and completes the steps of the signal processing flow in combination with the hardware thereof.
Specifically, the processor 1001, configured to read a program in the memory 1002, executes the following processes:
determining to deactivate, deactivating, and sending a secondary cell deactivation indication to a base station where a primary cell in the cross-base station carrier aggregation is located, where the secondary cell deactivation indication is used to indicate that a carrier aggregation state of the secondary cell is set to a deactivation state.
For a specific implementation process of the secondary cell deactivation procedure in the cross-base station carrier aggregation system, reference may be made to the foregoing embodiments, and details are not described here.
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.
While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (15)
1. A method for deactivating an auxiliary cell in a cross-base-station carrier aggregation system is applied to the cross-base-station carrier aggregation system comprising a main service base station and an auxiliary service base station, and is characterized by comprising the following steps:
the method comprises the steps that carrier aggregation gains between a primary cell and an auxiliary cell in cross-base station carrier aggregation are periodically detected, and when the detected carrier aggregation gains between the primary cell and the auxiliary cell are lower than a set threshold, the detected auxiliary cell is determined as the auxiliary cell needing to be deactivated;
and the main service base station where the main cell is located sends a secondary cell deactivation indication to the secondary service base station where the secondary cell is located, wherein the secondary cell deactivation indication is used for indicating the secondary cell to deactivate.
2. The method of claim 1, wherein the secondary cell deactivation indication comprises a user identity and a cell identity of the secondary cell.
3. The method of claim 2, wherein the secondary cell deactivation indication further includes a deactivation cause.
4. A method for deactivating an auxiliary cell in a cross-base-station carrier aggregation system is applied to the cross-base-station carrier aggregation system comprising a main service base station and an auxiliary service base station, and is characterized by comprising the following steps:
determining whether deactivation is needed by an auxiliary cell in cross-base station carrier aggregation according to cell load; if the auxiliary cell determines that the load of the auxiliary cell is higher than a set threshold, activating an intra-station auxiliary cell taking the auxiliary cell as a main cell, and performing load balancing, and if the load of the auxiliary cell is still higher than the threshold after the load balancing, determining that the auxiliary cell needs to be deactivated;
if the deactivation is determined, the secondary serving base station where the secondary cell is located sends a secondary cell deactivation indication to the base station where the primary cell in the cross-base-station carrier aggregation is located, where the secondary cell deactivation indication is used to indicate that the carrier aggregation state of the secondary cell is set to a deactivation state;
and the secondary cell is deactivated.
5. The method of claim 4, wherein after the secondary serving base station where the secondary cell is located sends the secondary cell deactivation indication, the method further comprises:
receiving a secondary cell deactivation confirmation sent by a primary service base station where the primary cell is located;
the secondary cell is deactivated, including:
and the secondary cell deactivates after receiving the deactivation confirmation of the secondary cell.
6. The method of claim 5, wherein the secondary cell deactivation acknowledgement is sent when a primary serving base station where the primary cell is located acknowledges that a deactivation reason for the secondary cell is not an implicit deactivation condition.
7. The method of claim 5, wherein the secondary cell deactivation acknowledgement comprises a user identity and a cell identity of the secondary cell.
8. The method of any of claims 4 to 7, wherein the secondary cell deactivation indication comprises a user identity and a cell identity of the secondary cell.
9. The method of claim 8, wherein the secondary cell deactivation indication further includes a deactivation cause.
10. A base station, applied to a cross-base-station carrier aggregation system including a primary serving base station and a secondary serving base station, the base station being the primary serving base station, comprising:
the determining module is used for detecting the carrier aggregation gain between the primary cell and the secondary cell according to the period of the primary cell, and determining the detected secondary cell as the secondary cell needing to be deactivated when the detected carrier aggregation gain between the primary cell and the secondary cell is lower than a set threshold;
an indication module, configured to send a secondary cell deactivation indication to a secondary serving base station where the secondary cell is located, where the secondary cell deactivation indication is used to indicate that the secondary cell is deactivated.
11. A base station is applied to a cross-base-station carrier aggregation system comprising a main service base station and an auxiliary service base station, wherein the base station is the auxiliary service base station, and the base station is characterized by comprising the following steps:
a determining module, configured to determine whether deactivation is required to be determined according to a cell load; if the load of the auxiliary cell is determined to be higher than a set threshold, activating an intra-station auxiliary cell taking the auxiliary cell as a main cell, carrying out load balancing, and if the load of the auxiliary cell is still higher than the threshold after the load balancing, determining that the auxiliary cell needs to be deactivated by the auxiliary cell;
an indication module, configured to send a secondary cell deactivation indication to a base station where a primary cell in the cross-base-station carrier aggregation is located when the determination module determines to deactivate, where the secondary cell deactivation indication is used to indicate to deactivate the secondary cell;
and the deactivation module is used for carrying out deactivation.
12. The base station of claim 11, wherein the deactivation module is specifically configured to:
and deactivating after receiving a secondary cell deactivation confirmation sent by the main service base station where the main cell is located according to the cell activation indication.
13. The base station of claim 12, wherein the secondary cell deactivation acknowledgement is sent when a primary serving base station where the primary cell is located acknowledges that a reason for deactivation of the secondary cell is not an implicit deactivation condition.
14. An apparatus for communication, comprising: a transceiver, a processor, and a memory;
the memory to store computer program instructions;
the processor, coupled to the memory, to read the computer program instructions stored by the memory and perform the method of any of claims 1-3.
15. An apparatus for communication, comprising: a transceiver, a processor, and a memory;
the memory to store computer program instructions;
the processor, coupled to the memory, to read the computer program instructions stored by the memory and perform the method of any of claims 4-9.
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| WO2020090201A1 (en) * | 2018-11-02 | 2020-05-07 | 日本電気株式会社 | Distributed unit, central unit, and methods therefor |
| CN112751655B (en) * | 2019-10-30 | 2023-05-02 | 中国电信股份有限公司 | Uplink carrier aggregation method, device, system and storage medium |
| CN111147072B (en) * | 2020-01-14 | 2023-03-24 | 长春理工大学 | High-precision frequency and phase discrimination method and system in homodyne coherent detection unit |
| CN111277399B (en) * | 2020-01-21 | 2023-02-03 | 展讯通信（上海）有限公司 | Control method, system, medium and electronic device for PDCCH monitoring |
| CN114760714A (en) * | 2021-01-08 | 2022-07-15 | 大唐移动通信设备有限公司 | SCG deactivation configuration method and device for auxiliary cell group and access network equipment |
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| CN105103589A (en) * | 2013-04-05 | 2015-11-25 | Lg电子株式会社 | Method for user equipment managing connection with small cell in heterogeneous cell environment |
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