WO2012058999A1 - 一种切换时辅小区配置的处理方法及其装置 - Google Patents

一种切换时辅小区配置的处理方法及其装置 Download PDF

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Publication number
WO2012058999A1
WO2012058999A1 PCT/CN2011/080756 CN2011080756W WO2012058999A1 WO 2012058999 A1 WO2012058999 A1 WO 2012058999A1 CN 2011080756 W CN2011080756 W CN 2011080756W WO 2012058999 A1 WO2012058999 A1 WO 2012058999A1
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WIPO (PCT)
Prior art keywords
secondary cell
dedicated signaling
rrc dedicated
user equipment
configuration information
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PCT/CN2011/080756
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English (en)
French (fr)
Inventor
陆扬
李海涛
梁靖
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大唐移动通信设备有限公司
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Publication of WO2012058999A1 publication Critical patent/WO2012058999A1/zh

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W36/00Hand-off or reselection arrangements
    • H04W36/0005Control or signalling for completing the hand-off
    • H04W36/0055Transmission or use of information for re-establishing the radio link
    • H04W36/0072Transmission or use of information for re-establishing the radio link of resource information of target access point
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0001Arrangements for dividing the transmission path
    • H04L5/0003Two-dimensional division
    • H04L5/0005Time-frequency
    • H04L5/0007Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT
    • H04L5/001Time-frequency the frequencies being orthogonal, e.g. OFDM(A), DMT the frequencies being arranged in component carriers

Definitions

  • the present invention relates to the field of wireless communications, and in particular, to a method and a device for processing a secondary cell configuration during handover. Background technique
  • the peak rate of the system is greatly improved compared to the LTE system, requiring downlink lGbps and uplink 500 Mbps. If only one carrier with a maximum bandwidth of 20MHz is used, the peak rate requirement cannot be reached. Therefore, the LTE-A system needs to extend the bandwidth that can be used by the user equipment (UE), thereby introducing a carrier aggregation (CA) technology, which is to aggregate multiple consecutive or discontinuous carriers under the same base station. Together, serve the UE at the same time to provide the required rate. Cells (member carriers) under different base stations cannot be aggregated. In order to ensure that the UE of the LTE system can work under each aggregated carrier, each carrier does not exceed 20 MHz at the maximum.
  • CA technology of the LTE-A system is shown in Figure 2.
  • the base station of the LTE-A system shown in FIG. 2 has four carriers that can be aggregated, and the base station Data transmission with the UE can be performed on 4 carriers simultaneously to improve system throughput.
  • the UE can simultaneously aggregate multiple cells for signaling scheduling and service transmission.
  • the concept of a primary serving cell (or a primary cell) and a secondary serving cell (or a secondary cell) is defined for a plurality of cells (cells) that are aggregated by the UE, and respectively correspond to a PCC (Primary Component Carrier) that is currently aggregated by the UE. ) and SCC (Secondary Component Carrier).
  • the UE can only initiate random access on the primary cell of the target base station, and the secondary cell of the target base station provides the resources required for carrier aggregation transmission.
  • some uplink resources including CQI (Channel Quality Indicator), DSR (Dedicated Scheduling Request) and uplink HARQ (Hybrid Automatic Repeat ReQuest) feedback
  • CQI Channel Quality Indicator
  • DSR Dedicated Scheduling Request
  • uplink HARQ Hybrid Automatic Repeat ReQuest
  • the configuration of (ACK (acknowledgement) / NACK (not acknowledged) is limited to the primary cell.
  • the selection of the primary cell is UE level, that is, all UEs in the system are not required to use the same primary cell or a cell on the same carrier.
  • the uplink and downlink carriers constituting the primary carrier need to satisfy the correspondence indicated in the system information SIB2.
  • the base station may not configure the uplink resource of the secondary cell, but only configure the downlink resource.
  • some cell management and other processes need to frequently search for the aggregated cell of the UE.
  • a cell in an aggregation range can be uniquely determined by a frequency point and a PCI (Physical Cell Identity).
  • PCI Physical Cell Identity
  • the cell number parameter of the UE level is introduced, and the code is 3 bits. The number of the cell will be allocated to the UE by the network while the cell is added.
  • the cell number of the primary cell is fixed to 0, and the cell number of the secondary cell is used in the range of 1 to 7.
  • the source base station determines whether a certain UE needs to perform handover by receiving the measurement report of the UE.
  • the source base station sends a handover request message to the target base station. If the target base station allows the UE to be admitted, the target base station generates a handover command (RRC (Radio Resource Control) connection reconfiguration message), and sends the handover command to the source base station, and the source base station transparently transmits the handover command to the UE.
  • RRC Radio Resource Control
  • the UE After receiving the handover command, the UE performs related parameter configuration, re-establishing MAC (Media Access Control), RLC (Radio Link Control), and PDCP (Packet Data Convergence Protocol). , update keys, etc. to switch related operations.
  • the cells in the UE configuration set may not completely change before and after the handover in the base station.
  • the cell configuration set of the UE before the handover is the cell 1, the cell 2, and the cell 3. After the handover, the UE is configured. The set becomes cell 2, cell 3, and cell 4.
  • the LTE system is a single-carrier system, and the UE only works on the serving cell.
  • the UE When the UE performs handover, the UE retains the configuration information of the source cell, and the base station performs delta configuration on the target cell according to the configuration.
  • the UE For systems using CA technology, there is currently no solution for how the UE handles the secondary cell configuration information in the handover process. Summary of the invention
  • An object of the present invention is to provide a processing method for a secondary cell configuration at the time of handover and a device thereof to implement secondary cell configuration processing during handover.
  • the present invention adopts the following technical solutions:
  • a method for processing a secondary cell configuration during handover, which is applied to a handover process of a multi-carrier aggregation system including:
  • the base station sends a radio resource control RRC dedicated signaling to the user equipment, and passes the The RRC dedicated signaling indicates whether the user equipment deletes the configuration information of the source secondary cell in an explicit manner, or indicates that the source secondary cell that needs to delete the configuration information is indicated to the user equipment if the user equipment is required to delete the configuration information of the source secondary cell.
  • a base station device which is applied to a handover process of a multi-carrier aggregation system, includes: a sending module, configured to send a radio resource control RRC dedicated signaling to a user equipment, and use an explicit manner to indicate whether the user equipment is used by the RRC dedicated signaling Deleting the configuration information of the source secondary cell, or instructing the user equipment to delete the source secondary cell that needs to delete the configuration information, if the user equipment is required to delete the configuration information of the source secondary cell;
  • the configuration module is configured to perform corresponding configuration on the user equipment according to the target primary cell and the target secondary cell of the user equipment.
  • a method for processing a secondary cell configuration during handover, which is applied to a handover process of a multi-carrier aggregation system including:
  • the user equipment receives the RRC dedicated signaling sent by the base station by using the foregoing method, and performs secondary cell configuration according to the indication of the explicit manner of the RRC dedicated signaling.
  • a user equipment including:
  • a receiving module configured to receive RRC dedicated signaling sent by the base station by using the foregoing method
  • a configuration module configured to perform secondary cell configuration according to the indication of the explicit manner of the RRC dedicated signaling
  • the RRC-specific signaling is sent to the user equipment by the base station, and the RRC dedicated signaling is used to indicate whether the user equipment deletes the configuration information of the source secondary cell, or the user equipment is required to delete the source auxiliary.
  • the source secondary cell that needs to delete the configuration information is indicated to the user equipment, thereby implementing the secondary cell configuration processing at the time of handover.
  • FIG. 1 is a schematic diagram of carrier distribution of an LTE cell in the prior art
  • 2 is a schematic diagram of an LTE-A cell using a CA technology in the prior art
  • FIG. 3 is a schematic flowchart of a process of configuring a secondary cell at the time of handover according to Embodiment 1 of the present invention
  • FIG. 4 is a schematic diagram of a processing flow of a secondary cell configuration at the time of handover according to the second embodiment of the present invention.
  • FIG. 5 is a schematic diagram of a processing flow of a secondary cell configuration at the time of handover according to the third embodiment of the present invention.
  • FIG. 6 is a schematic diagram of an application scenario in an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a base station device according to an embodiment of the present disclosure.
  • FIG. 8 is a schematic structural diagram of a user equipment according to an embodiment of the present invention. detailed description
  • the concepts of the primary cell and the secondary cell are introduced. Since only the full configuration can be used in the process of adding the secondary cell, when the UE performs inter-base station handover, the base station cannot incrementally configure the target secondary cell based on the configuration of the source secondary cell. Then, for the handover scenario between the base stations, the configuration information of the source secondary cell may be deleted. However, for the intra-base station handover scenario, if there is a secondary cell that has not changed before and after the handover, retaining the source secondary cell configuration can save signaling overhead. Therefore, it is necessary to distinguish between the two switching scenarios or to unify the processing of the two scenarios.
  • the embodiment of the present invention proposes a processing mechanism for a secondary cell configuration at the time of handover.
  • the target base station uses the RRC dedicated signaling to indicate whether the UE deletes or deletes the configuration of the secondary cells in an explicit manner.
  • the embodiment of the present invention cites three schemes, where the scheme 1 requires the source base station to provide the cell index to the target base station, and the scheme 2 and the scheme 3 do not need the source base station to provide the auxiliary information.
  • Figure 3, Figure 4 and Figure 5 show the specific implementation flow of the above three schemes.
  • FIG. 3 it is a configuration of a secondary cell configuration at the time of handover according to the first solution of the embodiment of the present invention.
  • Schematic diagram of the process which can include:
  • Step 301 In the handover preparation process, the source base station transmits the cell index of the source secondary cell to the target base station by using a handover request message.
  • Step 302 The target base station uses an explicit manner to indicate that the secondary cell configuration information that does not need to be reserved is deleted by using the handover command.
  • Step 303 The UE deletes configuration information of the corresponding source secondary cell according to the indication in the handover command (RRC command, such as RRC reconfiguration command) of the base station.
  • RRC command such as RRC reconfiguration command
  • the auxiliary information that the source base station transmits to the target base station through the handover request message may also be other information.
  • it may include a cell ID (Cell ID), a downlink frequency point + PCI, an ECGI (E-UTRAN Cell Global Identity, a global cell identification code under an evolved global terrestrial radio access network), a UE context (UE context), and a UE. Capacity, SCell (secondary cell) configuration information, etc. One or more of them, and other auxiliary information.
  • the target base station may be instructed to switch between the base stations on the one hand, and the target base station may perform other processing according to the received auxiliary information.
  • FIG. 4 is a schematic diagram of a processing flow of a secondary cell configuration at the time of handover according to the second embodiment of the present invention.
  • an IE Information Entity, Information Element
  • a handover command such as RRC reconfiguration with MCI
  • the process can include:
  • Step 401 The base station explicitly indicates whether the handover is an inter-base station handover or an intra-base station handover by configuring or not configuring the newly defined IE in the handover command (or by configuring a special value), or indicating whether to delete all the source SCell sets;
  • Step 402 The UE determines, according to the newly defined IE in the handover command, whether all the primary sources are small.
  • the configuration information of the area is deleted, and corresponding processing is performed according to the judgment result.
  • the UE deletes all SCdl configurations according to the IE, otherwise the SCdl configuration may not be processed; if the newly defined IE is used In order to indicate whether to delete all SCdls, the UE may delete or retain the configuration of all SCdls according to the IE.
  • FIG. 5 is a schematic flowchart of a process for configuring a secondary cell at the time of handover according to Embodiment 3 of the embodiment of the present invention, where the process may include:
  • Step 501 The base station includes all secondary cells with cell indexes 1 to 7 in the secondary cell deletion list in the handover command.
  • Step 502 The UE ignores the configuration in which the error is configured according to the indication of the base station, but performs correct configuration, and deletes the secondary cell configuration information corresponding to the correct configuration. That is, the UE deletes configuration information of all source secondary cells of the user equipment according to the indication in the handover command.
  • Embodiment 1 Performing inter-base station handover by using the foregoing scheme 1
  • the UE aggregates the cell 1, the cell 2, and the cell 3 operating under the base station 1, and their cell numbers are 0, 1, and 2, respectively.
  • the cell with the cell index of 0 is the primary cell, and the cell with the cell index of 1 and 2 is the former cell.
  • the UE moves from the base station 1 to the base station 2, and the base station 1 determines that the UE performs the handover.
  • the base station 1 sends a handover request message to the base station 2 through the X2 or S1 interface, and carries the number cell index 1, 2 of all the source secondary cells of the UE in the message. Send to base station 2.
  • the base station 2 decides to accept the UE in the cell 4, the cell 5, and the cell 6, where the cell 4 is the target primary cell, and the other two cells are the target secondary cells.
  • the base station 2 then generates a handover command, which includes configuration information of the cell 4, the cell 5, and the cell 6 (where the configuration information of the cell 4 is an incremental configuration based on the cell 1, and the cell 5 and the cell 6 are fully configured), and the cell
  • the deletion list contains the number cell index 1, 2 of the source secondary cell.
  • Base station 2 The handover command (such as the RRC connection reconfiguration message) is transmitted to the base station 1, and the base station 1 transparently transmits the handover command to the UE.
  • the UE After receiving the handover command, the UE releases the configuration information of the source secondary cell corresponding to the cell index 1 and 2 according to the indication of the cell deletion list (ie, releases the configuration information of the cell 2 and the cell 3), and retains the configuration information of the source primary cell ( That is, the configuration information of the cell 1 is based on the configuration information of the cell 1, and the parameters of the target primary cell are incrementally configured according to the incremental configuration information of the target primary cell carried in the handover command, and are carried according to the handover command.
  • the complete configuration information of the target secondary cell is completely configured for the parameters of the target secondary cell.
  • the full configuration means that the base station sends the complete configuration information to the UE through dedicated signaling.
  • the UE directly uses the configuration.
  • Incremental configuration means that both the UE and the base station keep the same old configuration, and then the base station will be different from the old one.
  • the parameters are sent to the UE through dedicated signaling.
  • the UE directly uses the new configuration sent by the base station. At the same time, for those parameters that are not present in the signaling, the old configuration or the old configuration (and corresponding function) is used.
  • the incremental configuration scheme can reduce the size of dedicated signaling and reduce signaling overhead.
  • the secondary cell related parameters may include, but are not limited to, a PDSCH (Physical Downlink Shared Channel) related parameter, such as a PDSCH dedicated configuration; a PUSCH (Physical Uplink Shared Channel) related parameter, such as PUSCH dedicated configuration; SRS (Sounding Reference Signal) related parameters, such as SRS dedicated configuration; antenna related parameters, such as antenna dedicated configuration; some parameters in system information, upper/downstream bandwidth, PDSCH common configuration, SRS common configuration Etc; deactivate the timer; and other parameters, not listed here.
  • a PDSCH Physical Downlink Shared Channel
  • PUSCH Physical Uplink Shared Channel
  • SRS Sounding Reference Signal
  • antenna related parameters such as antenna dedicated configuration
  • the above process can be used to detect that the target base station indicates that the user equipment deletes the configuration of the source secondary cell by transmitting the cell index of the source secondary cell to the target base station. Information.
  • Embodiment 2 Performing inter-base station handover by using the foregoing solution 2
  • This embodiment defines a new IE in the handover command to specifically indicate the handover type, i.e., whether it is an inter-base station handover or an intra-base station handover.
  • the name of the IE is defined as handoverType-rlO, and the type is defined as bool (bool). If the handoverType-rlO parameter is "false”, it indicates that the handover type is intra-base station handover; if the handoverType-rlO parameter is "true”, it indicates that the handover type is inter-base station handover (you can also use "true” to indicate that the handover type is intra-base station handover.
  • the IE may be located in the MobilityControlInfo (Mobility Control Information) in the RRC Connection Reconfiguration message, and the reconfiguration message format is as follows:
  • MobilityControlInfo SEQUENCE ⁇
  • the UE aggregates the cell 1, the cell 2, and the cell 3 operating under the base station 1.
  • the UE moves from the base station 1 to the base station 2, and the base station 1 decides that the UE performs handover, and the base station 1 transmits a handover request message to the base station 2 through the X2 or S1 interface.
  • the base station 2 decides to accept the UE in the cell 4, the cell 5, and the cell 6, where the cell 4 is the target primary cell, and the other two cells are the target secondary cells.
  • the base station 2 generates a handover command, which includes configuration information of the cell 4, the cell 5, and the cell 6 (where the configuration information of the cell 4 is an incremental configuration based on the cell 1, and the cell 5 and the cell 6 are completely configured), and the handoverType is included.
  • the -rlO parameter the value of the parameter is 'true', indicating that the handover type is inter-base station handover.
  • the configuration information of all source secondary cells needs to be deleted.
  • the base station 2 transmits a handover command (such as an RRC connection reconfiguration message) to the base station 1, and the base station 1 transparently transmits the handover command to the UE.
  • the UE After receiving the handover command, the UE determines that the handover type is inter-base station handover according to the handoverType-rlO parameter being 'true', and it is not necessary to retain the configuration information of the source secondary cell. Therefore, the UE deletes the configuration information of all the source secondary cells that it currently saves (ie, releases the configuration information of the cell 2 and the cell 3), and only retains the configuration information of the source primary cell (ie, the configuration information of the cell 1), and uses the cell 1 Based on the configuration information, the parameter of the target primary cell is incrementally configured according to the incremental configuration information of the target primary cell carried in the handover command, and the target secondary cell is configured according to the complete configuration information of the target secondary cell carried in the handover command. The parameters are fully configured.
  • the foregoing embodiment adds an IE to the handover command to indicate the handover type to the UE in an explicit manner.
  • the UE needs to delete the configuration of all the source secondary cells.
  • the information correspondingly, the base station sends the complete configuration information of the target secondary cell to the UE, so that the UE completely configures the target secondary cell.
  • the base station may also notify the UE of the secondary cell that needs to delete the configuration information, and send the complete configuration information of the target secondary cell to be configured to the UE, so that The UE can delete the corresponding source secondary cell according to the indication.
  • Configuration information and fully configure the target secondary cell.
  • the configuration information of the secondary cell may not be deleted, and the configuration information of the secondary cell may not be transmitted to the secondary cell that is the same as the source secondary cell.
  • Embodiment 3 Performing intra-base station handover by using scheme 2
  • the handover type is indicated in a manner of configuring or not configuring the IE. If the IE field is described as: the IE is present, indicating that the handover type is inter-base station handover; if the IE is not present, it indicates that the handover type is intra-base station handover (may also appear through the IE, indicating that the handover type is intra-base station handover; The IE does not appear to indicate inter-base station handover, depending on the meaning of the newly defined IE.
  • OPTIONAL can be noted after the IE, which means: The IE can appear or not appear in the signaling. If the IE appears in the signaling, the UE may use the configuration value of the IE; if the IE does not appear in the signaling, the behavior of the UE needs to refer to the Need code (required code) indicated in the OPTIONAL and the protocol. Corresponding text description.
  • Need code There are three types of Need code:
  • the meaning is that if the IE does not appear in the signaling, the UE performs the behavior specified in the protocol process, or performs the behavior specified in the IE "domain description";
  • the UE does not perform any operation, that is, does not configure the IE, or continues to use the original value of the IE;
  • the UE deletes or stops using the current value of the IE.
  • the Need code corresponding to the OPTIONAL may be defined to indicate an operation performed when the UE does not find the handoverType-rlO in the handover command.
  • the UE aggregates the cell 1, the cell 2, and the cell 3 under the base station 1, wherein the cell 1 is the primary cell, the cell 2 and the cell 3 are the secondary cells, and the cell indexes are 0, 1, and 2, respectively.
  • the base station 1 decides to switch the UE to the cell 4, the cell 5, and the cell 3 by using the measurement result reported by the UE, where the cell 4 is the primary cell, and the cell 5 and the cell 3 are the secondary cells.
  • the base station 1 generates a handover command, which includes configuration information of the cell 4 and the cell 5 (where the configuration information of the cell 4 is an incremental configuration based on the cell 1 and the cell 5 is fully configured), and the handoverType-rlO is not included.
  • the cell deletion list includes the cell index 1 (because the cell 3 is both the source secondary cell and the target secondary cell, the configuration information of the secondary cell can be retained, and only the configuration information of the cell 2 is deleted), and then the base station 1 will switch the command ( The RRC connection reconfiguration message is transmitted to the UE.
  • the UE After receiving the handover command, the UE does not find the handoverType-rlO parameter in the signaling, and determines that the handover type is intra-base station handover, and the UE retains its current source secondary cell configuration information (that is, retains the configuration information of the cell 2 and the cell 3). And configuration information of the source primary cell (ie, configuration information of the cell 1). Then, the UE deletes the cell (cell 2) configuration information with the cell index 1 according to the indication of the cell deletion list in the RRC connection reconfiguration message, and based on the configuration information of the source primary cell (cell 1), according to the handover command.
  • the incremental configuration information of the target primary cell is carried, and the parameters of the target primary cell are configured in an incremental manner, and the parameters of the target secondary cell are completely configured according to the complete configuration information of the target secondary cell carried in the handover command. After switching, continue to use the configuration of cell 3.
  • the foregoing embodiment adds an optional IE to the handover command to indicate the handover type to the UE in an explicit manner.
  • the handover command carries the IE
  • the UE needs to delete all the source secondary cells.
  • Configuration information correspondingly, the base station will target the small The complete configuration information of the area is sent to the UE, so that the UE completely configures the target secondary cell.
  • the base station may also notify the UE of the secondary cell that needs to delete the configuration information, and send the complete configuration information of the target secondary cell to be configured to the UE, so that the UE can delete according to the indication.
  • the configuration information of the corresponding source secondary cell is completely configured for the target secondary cell.
  • the configuration information of the secondary cell may not be deleted, and the configuration information of the secondary cell may not be deleted to the UE.
  • Embodiment 4 Performing inter-base station handover by using scheme 3
  • the UE aggregates the cell 1, the cell 2, and the cell 3 operating under the base station 1, and their cell numbers are 0, 1, and 2, respectively.
  • the cell with the cell index of 0 is the primary cell, and the cell with the cell index of 1 and 2 is the former cell.
  • the UE moves from the base station 1 to the base station 2, and the base station 1 decides that the UE performs handover, and the base station 1 transmits a handover request message to the base station 2 through the X2 or S1 interface.
  • the base station 2 decides to accept the UE in the cell 4, the cell 5, and the cell 6, wherein the cell 4 is the target primary cell, and the other two cells are the target secondary cells.
  • the base station 2 generates a handover command, which includes configuration information of the cell 4, the cell 5, and the cell 6 (where the configuration information of the cell 4 is an incremental configuration based on the cell 1, and the cell 5 and the cell 6 are completely configured), and is deleted in the cell.
  • the list contains the secondary cell number with cell index 1 ⁇ 7.
  • the base station 2 then transmits a handover command (e.g., an RRC connection reconfiguration message) to the base station 1, and the base station 1 transparently transmits the handover command to the UE.
  • a handover command e.g., an RRC connection reconfiguration message
  • the UE After receiving the handover command, the UE releases the configuration information of the source secondary cell corresponding to the cell index 1 to 7 according to the indication of the cell deletion list, but retains the configuration information of the source primary cell (that is, the configuration information of the cell 1). For the cell index of the source secondary cell that is not included in the cell deletion list, the UE automatically ignores the cell index, and does not consider the RRC connection reconfiguration message to be incorrect, that is, for the embodiment, the UE Cell deletion
  • the indication of the list releases the cell index from 1 to 7, and only releases the configuration information of the cell index 1, 2 (ie, cells 2, 3) owned by the cell index.
  • the UE is configured to incrementally configure the parameters of the target primary cell according to the configuration information of the cell 1 according to the configuration information of the target primary cell carried in the handover command, and according to the complete configuration information of the target secondary cell carried in the handover command, Fully configure the parameters of the target secondary cell.
  • the implementation of the fourth embodiment can also be applied to a scenario of handover in a base station.
  • the specific implementation method is similar to that in this embodiment, and is not described here.
  • the foregoing embodiment is configured to carry the cell index 1 ⁇ 7 in the handover command to explicitly indicate that the UE deletes the source secondary cell configuration information of the UE, and correspondingly, the base station completely configures the target secondary cell.
  • the information is sent to the UE, so that the UE fully configures the target secondary cell.
  • an embodiment of the present invention further provides a base station device and a user device.
  • FIG. 7 is a schematic structural diagram of a base station device according to an embodiment of the present invention.
  • the sending module 701 is configured to send the radio resource control RRC dedicated signaling to the user equipment, and use the RRC dedicated signaling to indicate, in an explicit manner, whether the user equipment deletes the configuration information of the source secondary cell, or the user equipment is required to delete the source auxiliary In the case of the configuration information of the cell, the source secondary cell that needs to delete the configuration information is indicated to the user equipment;
  • the configuration module 702 is configured to perform corresponding configuration on the user equipment according to the target primary cell and the target secondary cell of the user equipment.
  • the sending module 701 may receive a handover request message sent by the source base station, where the auxiliary information is carried; and, according to the auxiliary information, send the RRC dedicated signaling,
  • the RRC dedicated signaling carries the identifier of the source secondary cell that needs to delete the configuration information, and is used to instruct the user equipment to delete the corresponding source.
  • the auxiliary information sent by the sending module 701 may include a source secondary cell identifier.
  • the RRC dedicated signaling may also carry complete configuration information of the target secondary cell.
  • the sending module 701 is specifically configured to: send RRC dedicated signaling, where the specific indication information is carried, where the specific indication information is mandatory information, and is used to indicate that the user equipment deletes configuration information of all the source secondary cells; Or sending the RRC dedicated signaling, where the identifier of the source secondary cell that needs to delete the configuration information, and the specific indication information, where the specific indication information is mandatory information, is used to indicate that the user equipment is carried according to the RRC dedicated signaling.
  • the identifier of the source secondary cell deletes the configuration information of the corresponding source secondary cell.
  • the RRC dedicated signaling sent by the sending module 701 further includes the complete configuration information of the target secondary cell, where the specific indication information is used to indicate that the user equipment is based on the source carried in the RRC dedicated signaling.
  • the identifier of the secondary cell deletes the configuration information of the source secondary cell, the target secondary cell to which the complete configuration information belongs does not include the same cell as the source secondary cell.
  • the sending module 701 is specifically configured to: send RRC dedicated signaling, if the RRC dedicated signaling carries specific indication information, the RRC dedicated signaling indicates that the user equipment deletes configurations of all source secondary cells. If the RRC dedicated signaling does not carry the specific indication information, the RRC dedicated signaling further carries an identifier of the source secondary cell that needs to delete the configuration information, where the RRC dedicated signaling indicates the user equipment.
  • RRC dedicated signaling indicates that the user equipment deletes the configuration information of the corresponding source secondary cell according to the identifier of the source secondary cell carried in the signaling.
  • send The handover command sent by the module 701 further includes the complete configuration information of the target secondary cell, where the RRC dedicated signaling indicates that the user equipment deletes the corresponding source auxiliary according to the identifier of the source secondary cell carried in the RRC dedicated signaling.
  • the target secondary cell to which the complete configuration information belongs does not include the same cell as the source secondary cell.
  • the sending module 701 is specifically configured to: send RRC dedicated signaling, where the RRC dedicated signaling carries all identifiers for identifying the secondary cell, and is used to indicate that the user equipment deletes all source secondary cells of the user equipment. Configuration information.
  • the handover command sent by the sending module 701 further carries the complete configuration information of the target secondary cell.
  • FIG. 8 is a schematic structural diagram of a user equipment according to an embodiment of the present invention.
  • the receiving module 801 is configured to receive an RRC dedicated signaling sent by the base station by using the foregoing method.
  • the configuration module 802 is configured to perform secondary cell configuration according to the indication of the explicit manner of the RRC dedicated signaling.
  • the configuration module 802 may delete the configuration information of the corresponding secondary cell saved by the user equipment according to the secondary cell identifier carried in the RRC dedicated signaling.
  • the configuration module 802 is further configured to: when the user equipment does not save the configuration information of the secondary cell corresponding to the secondary cell identifier carried in the RRC dedicated signaling, the secondary cell identifier in the RRC dedicated signaling is ignored.
  • the target base station uses the RRC dedicated signaling in an explicit manner to indicate whether the UE deletes or deletes the configuration information of the secondary cells.
  • the method further includes two cases where the source base station is required to provide auxiliary information and the source base station is not required to provide auxiliary information.
  • the auxiliary information is that the source base station can send the cell index of the source secondary cell to the target base station, and the target base station uses the information to delete the secondary cell configuration information of the UE. If the auxiliary information is not provided, the target base station sends a handover type indication to the UE, or performs blind deletion on the source secondary cell of the UE.
  • modules in the apparatus in the embodiments may be distributed in the apparatus of the embodiment according to the description of the embodiments, or the corresponding changes may be located in one or more apparatuses different from the embodiment.
  • the modules of the above embodiments may be combined into one module, or may be further split into multiple sub-modules.
  • the present invention can be implemented by means of software plus a necessary general hardware platform, and of course, can also be through hardware, but in many cases, the former is a better implementation. the way.
  • the form of the software product is embodied, the computer software product being stored in a storage medium, including a plurality of instructions for causing a terminal device (which may be a mobile phone, a personal computer, a server, or a network device) to execute the present
  • a terminal device which may be a mobile phone, a personal computer, a server, or a network device

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Description

一种切换时辅小区配置的处理方法及其装置
本申请要求以下中国专利申请的优先权:
于 2010年 11月 5日提交中国专利局,申请号为 201010537661.X, 发明名称为 "一种切换时辅小区配置的处理方法及其装置"的中国专 利申请。 技术领域
本发明涉及无线通信领域,尤其涉及一种切换时辅小区配置的处 理方法及其装置。 背景技术
在 LTE ( Long Term Evolution, 长期演进) 系统及以前的无线通 信系统中, 一个基站下只有一个载波, 在 LTE 系统中最大带宽为 20MHz, 如图 1所示。
在 LTE Advanced ( LTE-A, 高级长期演进 )系统中, 系统的峰值 速率比 LTE系统有巨大的提高,要求达到下行 lGbps ,上行 500Mbps。 如果只使用一个最大带宽为 20MHz的载波是无法达到峰值速率要求 的。 因此, LTE-A系统需要扩展 UE ( User Equipment, 用户设备 )可 以使用的带宽, 由此引入了 CA ( Carrier Aggregation, 载波聚合)技 术, 即将同一个基站下的多个连续或不连续的载波聚合在一起, 同时 为 UE服务, 以提供所需的速率。 不同基站下的小区 (成员载波)不 能聚合。 为了保证 LTE系统的 UE能在每一个聚合的载波下工作,每 一个载波最大不超过 20MHz。 LTE-A系统的 CA技术如图 2。
图 2所示的 LTE-A系统的基站下有 4个可以聚合的载波, 基站 可以同时在 4个载波上和 UE进行数据传输, 以提高系统吞吐量。 在 LTE-A系统中, UE可同时聚合多个小区进行信令调度和业务 传输。 目前针对 UE聚合的多个小区 (cell )定义了主服务小区 (或 称主小区)和辅服务小区 (或称辅小区) 的概念, 分别对应了 UE当 前聚合的 PCC( Primary Component Carrier,主载波 )和 SCC( Secondary Component Carrier, 辅载波)。 在切换过程中, UE只能在目标基站的 主小区上发起随机接入,而目标基站的辅小区则提供载波聚合传输时 所需要的资源。 从资源分配的角度上, 目前一些上行资源(包括 CQI ( Channel Quality Indicator , 信道质量反馈)、 DSR ( Dedicated Scheduling Request, 专用调度请求)和上行 HARQ ( Hybrid Automatic Repeat reQuest, 混合自动重传请求 )反馈 ( ACK (确认) /NACK (不 确认)))的配置被限制在主小区上。 主小区的选取是 UE级别的, 即 不要求系统中所有 UE —定使用相同的主小区或者相同载波上的小 区。 另外, 构成主载波的上下行载波需要满足系统信息 SIB2中指示 的对应关系。基站可以不配置辅小区的上行资源, 而仅为其配置下行 资源。
在 CA系统中, 一些小区管理等过程(例如删除一个辅小区、 重 配一个辅小区、 激活 /去激活一个辅小区、 服务小区的信号质量上报 等)需要经常对 UE的聚合小区进行检索。 一个聚合范围内的小区可 以被频点和 PCI ( Physical Cell Identity , 物理小区标识 )唯一确定。 从信令开销的角度出发, 可以通过引入小区编号参数(cell index )来 避免大量重复使用载波频率和 PCI这两个参数。 目前引入 UE级别的 小区编号参数, 编码为 3bit, —个小区的编号将会在新增该小区的同 时由网络分配给 UE。 主小区的小区编号固定为 0, 辅小区的小区标 号使用范围为 1~7。 在切换时, 源基站通过接收 UE的测量上报来判决某个 UE是否 需要进行切换, 当源基站判决该 UE需要进行切换时, 源基站会向目 标基站发送切换请求消息。 如果目标基站允许接纳该 UE, 目标基站 将生成切换命令 ( RRC ( Radio Resource Control, 无线资源控制)连 接重配消息), 发送给源基站, 源基站再将该切换命令透传给 UE。 UE在收到切换命令之后, 执行相关参数配置、 重建 MAC ( Media Access Control, 媒体接入控制)、 RLC ( Radio Link Control, 无线链 路控制)、 PDCP( Packet Data Convergence Protocol,组数据集中协议)、 更新密钥等切换相关操作。
切换可以分为基站间切换和基站内切换。 在 CA系统中, 基站内 切换前后, UE配置集合内的小区可能不会完全发生变化, 例如, UE 在切换前的小区配置集合为小区 1、 小区 2和小区 3, 切换后, 该 UE 的配置集合变为了小区 2、 小区 3和小区 4。
LTE系统是单载波系统, UE只工作在服务小区上, 当 UE进行 切换时, UE保留源小区的配置信息, 基站根据该配置对目标小区进 行增量(delta )配置。 然而, 对于采用 CA技术的系统而言, 目前还 没有针对 UE如何处理切换过程中的辅小区配置信息这一问题的解决 方案。 发明内容
本发明的目的在于提供一种切换时辅小区配置的处理方法及其 装置, 以实现切换时的辅小区配置处理, 为此, 本发明采用如下技术 方案:
一种切换时辅小区配置的处理方法,应用于多载波聚合系统的切 换过程, 包括:
基站向用户设备发送无线资源控制 RRC专用信令, 并通过所述 RRC 专用信令采用显式方式指示用户设备是否删除源辅小区的配置 信息, 或者在要求用户设备删除源辅小区的配置信息的情况下, 向用 户设备指示出需要删除配置信息的源辅小区。
一种基站设备, 应用于多载波聚合系统的切换过程, 包括: 发送模块, 用于向用户设备发送无线资源控制 RRC专用信令, 并通过所述 RRC专用信令采用显式方式指示用户设备是否删除源辅 小区的配置信息,或者在要求用户设备删除源辅小区的配置信息的情 况下, 向用户设备指示出需要删除配置信息的源辅小区;
配置模块, 用于根据用户设备的目标主小区和目标辅小区, 为所 述用户设备进行相应配置。
一种切换时辅小区配置的处理方法,应用于多载波聚合系统的切 换过程, 包括:
用户设备接收基站使用上述方法发送的 RRC专用信令, 并根据 所述 RRC专用信令的显式方式的指示, 进行辅小区配置。
一种用户设备, 包括:
接收模块, 用于接收基站使用上述方法发送的 RRC专用信令; 配置模块, 用于根据所述 RRC专用信令的显式方式的指示, 进 行辅小区配置。
本发明的上述实施例,通过基站向用户设备发送 RRC专用信令, 并通过所述 RRC专用信令采用显式方式指示用户设备是否删除源辅 小区的配置信息,或者在要求用户设备删除源辅小区的配置信息的情 况下, 向用户设备指示出需要删除配置信息的源辅小区, 从而实现了 切换时的辅小区配置处理。 附图说明
图 1为现有技术中 LTE小区的载波分布示意图; 图 2为现有技术中采用 CA技术的 LTE-A小区示意图; 图 3 为本发明实施例方案一提供的切换时辅小区配置的处理流 程示意图;
图 4 为本发明实施例方案二提供的切换时辅小区配置的处理流 程示意图;
图 5 为本发明实施例方案三提供的切换时辅小区配置的处理流 程示意图;
图 6为本发明实施例中的应用场景示意图;
图 7为本发明实施例提供的基站设备的结构示意图;
图 8为本发明实施例提供的用户设备的结构示意图。 具体实施方式
在 LTE-A系统的 CA技术中, 引入了主小区和辅小区的概念。 由 于在添加辅小区的过程中只能使用完全配置, 因此, 当 UE进行基站 间切换时, 基站不能基于源辅小区的配置对目标辅小区进行增量配 置。 那么, 对于基站间切换场景, 源辅小区的配置信息可以删除。 然 而,对于基站内切换场景,如果在切换前后存在未发生变化的辅小区, 则保留源辅小区配置可以节约信令开销。 因此, 有必要区分这两种切 换场景, 或者统一两种场景的处理方式。 为此, 本发明实施例提出了 一种切换时辅小区配置的处理机制。 本发明实施例在切换过程中, 目 标基站利用显式方式通过 RRC专用信令来指示 UE是否删除或者删 除哪些辅小区的配置。
本发明实施例列举了三种方案,其中方案一需要源基站向目标基 站提供辅助信息 (cell index ), 方案二和方案三不需要源基站提供辅 助信息。图 3、图 4和图 5分别示出了上述三种方案的具体实现流程。
参见图 3, 为本发明实施例方案一提供的切换时辅小区配置的处 理流程示意图, 该流程可包括:
步骤 301 , 在切换准备过程中, 源基站通过切换请求消息将源辅 小区的 cell index传递给目标基站;
步骤 302, 目标基站通过切换命令采用显式方式指示对不需要保 留的辅小区配置信息进行删除;
步骤 303, UE根据基站的切换命令 ( RRC命令, 如 RRC重配命 令 ) 中的指示来删除相应源辅小区的配置信息。
需要说明的是,源基站通过切换请求消息传递给目标基站的辅助 信息还可以是其他信息。如,可包括小区 ID( Cell ID )、下行频点 +PCI、 ECGI ( E-UTRAN Cell Global Identity , 演进的全球陆地无线接入网络 下的全球小区识别码), UE context ( UE上下文)、 UE 能力, SCell (辅小区) 配置信息等其中的一种或多种, 还可以是其他辅助信息。 通过传递辅助信息给目标基站,可以一方面指示目标基站本次切换是 基站间切换, 还可以使目标基站根据接收到的辅助信息进行其他处 理。
参见图 4, 为本发明实施例方案二提供的切换时辅小区配置的处 理流程示意图。 本方案中, 在切换命令 (如 RRC reconfiguration with MCI ( Mobility Control Infomation, 移动性控制信息 ) ) 中新定义一个 IE ( Information Entity, 信息单元) 来指示切换类型, 用于区分基站 间切换和基站内切换, 或者新定义一个 IE来指示 UE是否删除全部 源辅小区的配置信息。 该流程可包括:
步骤 401 , 基站通过在切换命令中配置或不配置该新定义 IE (或 通过配置特殊值 ) 来显式指示本次切换是基站间切换还是基站内切 换, 或指示是否删除全部源 SCell集合;
步骤 402, UE根据切换命令中新定义 IE判断是否将全部源辅小 区的配置信息删除, 并根据判断结果进行相应处理。 具体的, 如果新 定义 IE是用于指示切换类型的, 则当切换类型为基站间切换时, UE 才艮据该 IE删除所有 SCdl配置, 否则可不对 SCdl配置^处理; 如果 新定义 IE是用于指示是否删除全部 SCdl的, 则 UE可根据该 IE删 除或保留所有 SCdl的配置。
参见图 5, 为本发明实施例方案三提供的切换时辅小区配置的处 理流程示意图, 该流程可包括:
步骤 501 ,基站在切换命令中的辅小区删除列表中包含 cell index 为 1~7的所有辅小区;
步骤 502, UE根据基站的指示, 忽略其中错误的配置, 但是执 行正确配置, 删除这些正确配置所对应的辅小区配置信息。 即, UE 根据切换命令中的指示删除该用户设备的所有源辅小区的配置信息。
下面结合具体应用场景, 对本发明实施例进行详细描述。
实施例一: 采用上述方案一执行基站间切换
如图 6所示,UE聚合工作在基站 1下的小区 1、小区 2和小区 3, 它们的小区编号分别 0, 1 , 2。 其中 cell index为 0的小区为主小区, cell index为 1和 2的小区为前小区。
UE从基站 1向基站 2移动, 基站 1判决 UE进行切换, 基站 1 通过 X2或者 S1接口向基站 2发送切换请求消息,同时将 UE所有源 辅小区的编号 cell index 1、 2携带于该消息中发送给基站 2。
基站 2决定在小区 4、 小区 5和小区 6接纳 UE, 其中小区 4为 目标主小区,其他两个小区为目标辅小区。然后基站 2生成切换命令, 其中包含小区 4、 小区 5和小区 6的配置信息(其中小区 4的配置信 息为基于小区 1的增量配置, 而小区 5和小区 6为完全配置), 并且 在小区删除列表中包含源辅小区的编号 cell index 1、 2。 然后基站 2 将切换命令(如 RRC连接重配消息)传给基站 1 , 基站 1将该切换 命令透传给 UE。
UE收到切换命令之后, 根据其中小区删除列表的指示释放 cell index为 1和 2对应的源辅小区的配置信息 (即释放小区 2和小区 3 的配置信息), 保留源主小区的配置信息(即小区 1的配置信息), 并 以小区 1的配置信息为基础,按照切换命令中携带的目标主小区的增 量配置信息, 对目标主小区的参数进行增量配置, 并且根据切换命令 中携带的目标辅小区的完全配置信息对目标辅小区的参数进行完全 配置。
其中,完全配置是指基站将完整的配置信息通过专用信令方式发 给 UE, UE直接使用该配置; 增量配置是指 UE和基站内部均保存同 一套旧配置,然后基站将与旧配置不同的参数通过专用信令方式发给 UE, UE直接使用基站发送的新配置, 同时, 对于那些没有在信令中 出现的参数, 则沿用旧配置或释放旧配置(及相应功能)。 采用增量 配置方案, 可以降低专用信令的大小, 降低信令开销。
辅小区相关参数可包括但不限于: PDSCH ( Physical Downlink Shared Channel, 物理下行链路共享信道)相关参数, 如 PDSCH专用 配置; PUSCH ( Physical Uplink Shared Channel, 物理上行链路共享 信道)相关参数, 如 PUSCH 专用配置; SRS ( Sounding Reference Signal, 探测参考信号 )相关参数, 如 SRS专用配置; 天线相关参数, 如天线专用配置; 系统信息中的部分参数, 如上 /下行带宽、 PDSCH 公共配置、 SRS公共配置等; 去激活计时器; 以及其它参数, 在此不 再列举。
通过以上流程可以看出, 本实施例通过将源辅小区的 cell index 传递给目标基站,可以使目标基站指示用户设备删除源辅小区的配置 信息。
实施例二: 采用上述方案二执行基站间切换
此实施例在切换命令中定义了一个新 IE, 用来专门指示切换类 型, 即, 是基站间切换还是基站内切换。 本实施例中, 将该 IE的名 称定义为 handoverType-rlO , 类型定义为布尔 ( bool )。 如果 handoverType-rlO参数为 "false" , 表示切换类型为基站内切换; 如果 handoverType-rlO参数为 "true" , 表示切换类型为基站间切换(也可 以使用 "true" 表示切换类型为基站内切换, 使用 "false" 表示切换 类型为基站间切换, 视新定义 IE的含义而定)。 该 IE可位于 RRC连 接重配消息中的 MobilityControlInfo (移动性控制信息) 中, 重配消 息格式示意如下所示:
MobilityControlInfo:: = SEQUENCE {
targetPhysCelld PhysCelld,
carrierFreq CarrierFreqEUTRA OPTIONAL, -- Cond HO-toEUTRA
carrierBandwidth CarrierB andwidthEUTR A OPTIONAL,
Cond HO-toEUTRA
additionalSpectrumEmission AdditionalSpectrumEmission OPTIONAL, Cond HO-toEUTRA
1304 ENUMERATED {
ms50, mslOO, msl50, ms200, ms500, mslOOO, ms2000, sparel },
newUE-Identity C-RNTI,
radioResourceConfigi RadioResourceConfigCommon,
rach-ConfigDedicated RACH-ConfigDedicated OPTIONAL,
Need OP
handoverType-rlO BOOLEAN OPTIONAL.
Need OP 如图 6所示,UE聚合工作在基站 1下的小区 1、小区 2和小区 3。 UE从基站 1向基站 2移动, 基站 1判决 UE进行切换, 基站 1通过 X2或者 S1接口向基站 2发送切换请求消息。 基站 2决定在小区 4、 小区 5和小区 6接纳 UE, 其中小区 4为目标主小区, 其他两个小区 为目标辅小区。 然后基站 2生成切换命令, 其中包含小区 4、 小区 5 和小区 6的配置信息(其中小区 4的配置信息为基于小区 1的增量配 置, 而小区 5和小区 6为完全配置), 并包含 handoverType-rlO参数, 该参数的值为 'true' , 表示切换类型为基站间切换, 针对该种切换类 型需要删除所有源辅小区的配置信息。 然后基站 2将切换命令(如 RRC连接重配消息 )传给基站 1 , 基站 1将该切换命令透传给 UE。
UE收到切换命令之后, 根据 handoverType-rlO参数为 'true' , 判断切换类型为基站间切换, 没有必要保留源辅小区的配置信息。 因 此, UE将其当前保存的全部源辅小区的配置信息删除(即释放小区 2和小区 3的配置信息), 仅保留源主小区的配置信息(即小区 1的 配置信息), 并以小区 1的配置信息为基础, 根据切换命令中携带的 目标主小区的增量配置信息, 对目标主小区的参数进行增量配置, 根 据切换命令中携带的目标辅小区的完全配置信息,对目标辅小区的参 数进行完全配置。
通过以上流程可以看出, 本实施例通过在切换命令中新增 IE, 以显式方式为 UE指示出切换类型, 当切换类型为在基站间切换时, UE需要删除其所有源辅小区的配置信息, 相应的, 基站将目标辅小 区的完全配置信息发送给 UE, 以使 UE对目标辅小区进行完全配置。 同理, 当该 IE所指示的切换类型为在基站内切换时, 基站还可将需 要删除配置信息的辅小区通知 UE, 并将需要配置的目标辅小区的完 全配置信息发送给 UE, 从而使 UE能够根据指示删除相应源辅小区 的配置信息, 并对目标辅小区进行完全配置。 其中, 为了节省信令开 销, 对于目标辅小区与源辅小区相同的辅小区, 则可以保留该辅小区 的配置信息不删除, 相应的, 基站可不将该辅小区的配置信息传递给
UE。
实施例三: 采用方案二执行基站内切换
基于实施例二中新定义的 IE, 在本实施例中, 以配置或不配置 该 IE的方式来指示切换类型。 如果该 IE的域描述为: 该 IE出现, 表示切换类型为基站间切换; 如果该 IE未出现, 则表示切换类型为 基站内切换(也可以通过该 IE出现, 表示切换类型为基站内切换; 该 IE不出现表示基站间切换, 视新定义 IE的含义而定)。
根据现有标准 ASN.1 , 可在 IE的后面注明 OPTIONAL, 其含义 是: 该 IE可以在信令中出现或者不出现。 如果该 IE在信令中出现, 则 UE可使用该 IE的配置值; 如果该 IE在信令中没有出现, 则 UE 的行为需要参考 OPTIONAL后面注明的 Need code (所需代码 )以及 协议中的相应文字描述。
目前, Need code有三种:
( 1 ) Need OP
含义是如果该 IE在信令中没有出现, 则 UE执行协议过程中规 定的行为, 或执行该 IE "域描述" 中规定的行为;
( 2 ) Need ON
如果该 IE在信令中没有出现, 则 UE不执行任何操作, 即, 不 配置该 IE, 或者继续使用该 IE的原有值;
( 3 ) Need OR
如果该 IE在信令中没有出现, 则 UE删除或停止使用该 IE的当 前值。 本实施例根据以上规定, 可定义 OPTIONAL对应的 Need code, 以指示 UE未在切换命令中发现 handoverType-rlO时所执行的操作。
如图 6所示,UE聚合工作在基站 1下的小区 1、小区 2和小区 3, 其中小区 1为主小区,小区 2和小区 3为辅小区, cell index分别为 0, 1和 2。 此时,基站 1通过 UE上报的测量结果, 决定将该 UE切换到 小区 4、 小区 5和小区 3上, 其中小区 4为主小区, 小区 5和小区 3 为辅小区。
根据以上场景, 基站 1生成切换命令, 其中包含小区 4和小区 5 的配置信息(其中小区 4的配置信息为基于小区 1的增量配置, 而小 区 5为完全配置), 并且未包含 handoverType-rlO参数, 小区删除列 表中包含 cell index 1 (由于小区 3既是源辅小区也是目标辅小区, 因 此可保留该辅小区的配置信息, 而仅删除小区 2的配置信息), 然后 基站 1将切换命令 (如 RRC连接重配消息 )传给 UE。
UE收到切换命令之后, 在该信令中没有发现 handoverType-rlO 这个参数, 判断切换类型为基站内切换, 则 UE保留其当前的源辅小 区配置信息(即保留小区 2和小区 3的配置信息 )和源主小区的配置 信息 (即小区 1的配置信息)。 然后, UE根据 RRC连接重配消息中 的小区删除列表的指示, 删除 cell index为 1的小区(小区 2 )配置信 息, 并以源主小区 (小区 1 ) 的配置信息为基础, 根据切换命令中携 带的目标主小区的增量配置信息, 对目标主小区的参数进行增量配 置, 根据切换命令中携带的目标辅小区的完全配置信息, 对目标辅小 区的参数进行完全配置。 切换后, 继续使用小区 3的配置。
通过以上流程可以看出,本实施例通过在切换命令中新增可选的 IE, 以显式方式为 UE指示出切换类型, 当切换命令中携带该 IE时, UE需要删除其所有源辅小区的配置信息, 相应的, 基站将目标辅小 区的完全配置信息发送给 UE, 以使 UE对目标辅小区进行完全配置。 同理, 当切换命令中不携带该 IE时, 基站还可将需要删除配置信息 的辅小区通知 UE, 并将需要配置的目标辅小区的完全配置信息发送 给 UE, 从而使 UE能够根据指示删除相应源辅小区的配置信息, 并 对目标辅小区进行完全配置。 其中, 为了节省信令开销, 对于目标辅 小区与源辅小区相同的辅小区,则可以保留该辅小区的配置信息不删 除, 相应的, 基站可不将该辅小区的配置信息传递给 UE。
实施例四: 采用方案三执行基站间切换
如图 6所示,UE聚合工作在基站 1下的小区 1、小区 2和小区 3, 它们的小区编号分别 0, 1 , 2。 其中 cell index为 0的小区为主小区, cell index为 1和 2的小区为前小区。
UE从基站 1向基站 2移动, 基站 1判决 UE进行切换, 基站 1 通过 X2或者 S1接口向基站 2发送切换请求消息。 基站 2决定在小 区 4、 小区 5和小区 6接纳 UE, 其中小区 4为目标主小区, 其他两 个小区为目标辅小区。
基站 2生成切换命令, 其中包含小区 4、 小区 5和小区 6的配置 信息(其中小区 4的配置信息为基于小区 1的增量配置, 而小区 5和 小区 6为完全配置 ),并且在小区删除列表中包含 cell index为 1~7的 辅小区编号。 然后基站 2将切换命令 (如 RRC连接重配消息 )传给 基站 1 , 基站 1将该切换命令透传给 UE。
UE收到切换命令之后, 根据其中小区删除列表的指示释放 cell index为 1~7对应的源辅小区的配置信息, 但保留源主小区的配置信 息(即小区 1的配置信息)。 其中, 对于小区删除列表中包含, 但 UE 上所没有的源辅小区的 cell index, UE自动忽略该 cell index, 而不认 为该 RRC连接重配消息有误, 即, 对于本实施例, UE根据小区删除 列表的指示释放 cell index为 1~7, 仅释放其所拥有的 cell index 1、 2 (即小区 2、 3 )的配置信息。 UE以小区 1的配置信息为基础, 根据 切换命令中携带的目标主小区的增量配置信息,对目标主小区的参数 进行增量配置, 根据切换命令中携带的目标辅小区的完全配置信息, 对目标辅小区的参数进行完全配置。
需要说明的是,实施例四的实现方案也可以应用于基站内切换的 场景。 对于基站内切换场景, 具体实施方法与本实施例类似, 在此不 再赘述。
通过以上流程可以看出, 本实施例通过在切换命令中携带 cell indexl~7, 以显式方式指示 UE删除该 UE所具有的源辅小区配置信 息, 相应的,基站将目标辅小区的完全配置信息发送给 UE, 以使 UE 对目标辅小区进行完全配置。
基于相同的技术构思,本发明实施例还提供了一种基站设备和用 户设备。
参见图 7, 为本发明实施例提供的基站设备的结构示意图。
发送模块 701 , 用于向用户设备发送无线资源控制 RRC专用信 令, 并通过所述 RRC专用信令采用显式方式指示用户设备是否删除 源辅小区的配置信息,或者在要求用户设备删除源辅小区的配置信息 的情况下, 向用户设备指示出需要删除配置信息的源辅小区;
配置模块 702, 用于根据用户设备的目标主小区和目标辅小区, 为所述用户设备进行相应配置。
上述基站设备中, 当用户设备在基站间切换时, 发送模块 701可 接收源基站发送的切换请求消息, 其中携带有辅助信息; 以及, 根据 所述辅助信息发送所述 RRC专用信令,所述 RRC专用信令中携带有 需要删除配置信息的源辅小区的标识,用于指示用户设备删除相应源 辅小区的配置信息。发送模块 701发送的辅助信息可包括源辅小区标 识。 所述 RRC专用信令中还可携带有目标辅小区的完全配置信息。
上述基站设备中, 发送模块 701可具体用于: 发送 RRC专用信 令, 其中携带有特定指示信息, 所述特定指示信息为必选信息, 用于 指示用户设备删除所有源辅小区的配置信息; 或者, 发送 RRC专用 信令,其中携带有需要删除配置信息的源辅小区的标识以及特定指示 信息, 所述特定指示信息为必选信息, 用于指示用户设备根据所述 RRC 专用信令中携带的源辅小区的标识删除相应源辅小区的配置信 息。 具体的, 发送模块 701发送的所述 RRC专用信令中还携带有目 标辅小区的完全配置信息; 其中, 当所述特定指示信息用于指示用户 设备根据所述 RRC专用信令中携带的源辅小区的标识删除相应源辅 小区的配置信息时,所述完全配置信息所属的目标辅小区中不包括与 源辅小区相同的小区。
上述基站设备中, 发送模块 701可具体用于: 发送 RRC专用信 令, 如果所述 RRC专用信令中携带有特定指示信息, 则所述 RRC专 用信令指示用户设备删除所有源辅小区的配置信息; 如果所述 RRC 专用信令中未携带有所述特定指示信息, 则所述 RRC专用信令中还 携带有需要删除配置信息的源辅小区的标识, 所述 RRC专用信令指 示用户设备根据该信令中携带的源辅小区的标识删除相应源辅小区 的配置信息; 或者, 发送 RRC专用信令, 如果所述 RRC专用信令 中未携带有特定指示信息, 则所述 RRC专用信令指示用户设备删除 所有源辅小区的配置信息; 如果所述 RRC专用信令中携带有所述特 定指示信息, 则所述 RRC专用信令中还携带有需要删除配置信息的 源辅小区的标识, 所述 RRC专用信令指示用户设备根据该信令中携 带的源辅小区的标识删除相应源辅小区的配置信息。 进一步的, 发送 模块 701 发送的所述切换命令中还携带有目标辅小区的完全配置信 息; 其中, 所述 RRC专用信令指示用户设备根据所述 RRC专用信令 中携带的源辅小区的标识删除相应源辅小区的配置信息时,所述完全 配置信息所属的目标辅小区中不包括与源辅小区相同的小区。
上述基站设备中, 发送模块 701可具体用于: 发送 RRC专用信 令, 所述 RRC专用信令中携带有用于标识辅小区的所有标识, 用于 指示用户设备删除该用户设备的所有源辅小区的配置信息。发送模块 701发送的所述切换命令中还携带有目标辅小区的完全配置信息。
参见图 8, 为本发明实施例提供的用户设备的结构示意图。
接收模块 801 , 用于接收基站使用前述方法发送的 RRC专用信 令;
配置模块 802, 用于根据所述 RRC专用信令的显式方式的指示, 进行辅小区配置。
上述用户设备中, 配置模块 802可根据所述 RRC专用信令中携 带的辅小区标识, 删除该用户设备保存的相应辅小区的配置信息。 该 配置模块 802还可用于, 所述用户设备未保存有所述 RRC专用信令 中携带的辅小区标识对应的辅小区的配置信息时, 忽略所述 RRC专 用信令中的该辅小区标识。
综上所述, 本发明实施例在切换过程中, 目标基站利用显式方式 通过 RRC专用信令来指示 UE是否删除或者删除哪些辅小区的配置 信息。该方式又包括需要源基站提供辅助信息和不需要源基站提供辅 助信息两个情况。提供辅助信息是指, 源基站可以向目标基站发送源 辅小区的 cell index, 目标基站利用该信息对 UE的辅小区配置信息进 行删除。 不提供辅助信息是指, 目标基站向 UE发送切换类型指示, 或者对 UE的源辅小区进行盲删除。 本领域技术人员可以理解实施例中的装置中的模块可以按照实 施例描述进行分布于实施例的装置中,也可以进行相应变化位于不同 于本实施例的一个或多个装置中。上述实施例的模块可以合并为一个 模块, 也可以进一步拆分成多个子模块。
通过以上的实施方式的描述,本领域的技术人员可以清楚地了解 到本发明可借助软件加必需的通用硬件平台的方式来实现, 当然也可 以通过硬件,但很多情况下前者是更佳的实施方式。基于这样的理解, 软件产品的形式体现出来, 该计算机软件产品存储在一个存储介质 中, 包括若干指令用以使得一台终端设备(可以是手机,个人计算机, 服务器, 或者网络设备等)执行本发明各个实施例所述的方法。
以上所述仅是本发明的优选实施方式, 应当指出, 对于本技术领 域的普通技术人员来说, 在不脱离本发明原理的前提下, 还可以做出 若干改进和润饰, 这些改进和润饰也应视本发明的保护范围。

Claims

权利要求
1、 一种切换时辅小区配置的处理方法, 应用于多载波聚合系统 的切换过程, 其特征在于, 包括:
基站向用户设备发送无线资源控制 RRC专用信令, 并通过所述 RRC 专用信令采用显式方式指示用户设备是否删除源辅小区的配置 信息, 或者在要求用户设备删除源辅小区的配置信息的情况下, 向用 户设备指示出需要删除配置信息的源辅小区。
2、 如权利要求 1所述的方法, 其特征在于, 当用户设备在基站 间切换时, 基站向用户设备发送 RRC专用信令, 并通过所述 RRC专 用信令进行所述显式方式指示的过程, 包括:
目标基站接收源基站发送的切换请求消息, 其中携带有辅助信 息;
目标基站根据所述辅助信息发送所述 RRC专用信令, 所述 RRC 专用信令中携带有需要删除配置信息的源辅小区的标识,用于指示用 户设备删除相应源辅小区的配置信息。
3、 如权利要求 2所述的方法, 其特征在于, 所述辅助信息包括 源辅小区标识。
4、 如权利要求 2所述的方法, 其特征在于, 所述 RRC专用信令 中还携带有目标辅小区的完全配置信息。
5、 如权利要求 1所述的方法, 其特征在于, 所述基站向用户设 备发送 RRC专用信令,并通过所述 RRC专用信令进行所述显式方式 指示的过程, 包括:
基站发送 RRC专用信令, 其中携带有特定指示信息, 所述特定 指示信息为必选信息,用于指示用户设备删除所有源辅小区的配置信 息;
或者, 基站发送 RRC专用信令, 其中携带有需要删除配置信息 的源辅小区的标识以及特定指示信息, 所述特定指示信息为必选信 息, 用于指示用户设备根据所述 RRC专用信令中携带的源辅小区的 标识删除相应源辅小区的配置信息。
6、 如权利要求 5所述的方法, 其特征在于, 所述 RRC专用信令 中还携带有目标辅小区的完全配置信息。
7、 如权利要求 6所述的方法, 其特征在于, 当所述特定指示信 息用于指示用户设备根据所述 RRC专用信令中携带的源辅小区的标 识删除相应源辅小区的配置信息时,所述完全配置信息所属的目标辅 小区中不包括与源辅小区相同的小区。
8、 如权利要求 5所述的方法, 其特征在于, 所述特定指示信息 为用于表示切换类型的指示信息,所述切换类型包括基站间切换和基 站内切换; 其中, 表示基站间切换的特定指示信息用于指示用户设备 删除所有源辅小区的配置信息,表示基站内切换的特定指示信息用于 指示用户设备根据所述 RRC专用信令中携带的源辅小区的标识删除 相应源辅小区的配置信息。
9、 如权利要求 1所述的方法, 其特征在于, 基站向用户设备发 送 RRC专用信令,并通过所述 RRC专用信令进行所述显式方式指示 的过程, 包括:
基站发送 RRC专用信令, 如果所述 RRC专用信令中携带有特 定指示信息, 则所述 RRC专用信令指示用户设备删除所有源辅小区 的配置信息;如果所述 RRC专用信令中未携带有所述特定指示信息, 则所述 RRC专用信令中还携带有需要删除配置信息的源辅小区的标 识, 所述 RRC专用信令指示用户设备根据该信令中携带的源辅小区 的标识删除相应源辅小区的配置信息;
或者, 基站发送 RRC专用信令, 如果所述 RRC专用信令中未 携带有特定指示信息, 则所述 RRC专用信令指示用户设备删除所有 源辅小区的配置信息; 如果所述 RRC专用信令中携带有所述特定指 示信息, 则所述 RRC专用信令中还携带有需要删除配置信息的源辅 小区的标识, 所述 RRC专用信令指示用户设备根据该信令中携带的 源辅小区的标识删除相应源辅小区的配置信息。
10、 如权利要求 9所述的方法, 其特征在于, 所述 RRC专用信 令中还携带有目标辅小区的完全配置信息。
11、 如权利要求 10所述的方法, 其特征在于, 所述 RRC专用信 令指示用户设备根据所述 RRC专用信令中携带的源辅小区的标识删 除相应源辅小区的配置信息时,所述完全配置信息所属的目标辅小区 中不包括与源辅小区相同的小区。
12、 如权利要求 1所述的方法, 其特征在于, 所述基站向用户设 备发送 RRC专用信令,并通过所述 RRC专用信令进行所述显式方式 指示的过程, 包括: 基站发送 RRC专用信令,所述 RRC专用信令中携带有用于标识 辅小区的所有标识,用于指示用户设备删除该用户设备的所有源辅小 区的配置信息。
13、 如权利要求 12所述的方法, 其特征在于, 所述 RRC专用信 令中还携带有目标辅小区的完全配置信息。
14、 如权利要求 1至 13任一项所述的方法, 其特征在于, 所述 RRC专用信令为切换命令。
15、 一种基站设备, 应用于多载波聚合系统的切换过程, 其特征 在于, 包括:
发送模块, 用于向用户设备发送无线资源控制 RRC专用信令, 并通过所述 RRC专用信令采用显式方式指示用户设备是否删除源辅 小区的配置信息,或者在要求用户设备删除源辅小区的配置信息的情 况下, 向用户设备指示出需要删除配置信息的源辅小区;
配置模块, 用于根据用户设备的目标主小区和目标辅小区, 为所 述用户设备进行相应配置。
16、 如权利要求 15所述的基站设备, 其特征在于, 当用户设备 在基站间切换时, 所述发送模块具体用于: 接收源基站发送的切换请 求消息, 其中携带有辅助信息; 以及, 根据所述辅助信息发送所述 RRC专用信令, 所述 RRC专用信令中携带有需要删除配置信息的源 辅小区的标识, 用于指示用户设备删除相应源辅小区的配置信息。
17、 如权利要求 16所述的基站设备, 其特征在于, 所述发送模 块发送的辅助信息包括源辅小区标识。
18、 如权利要求 16所述的基站设备, 其特征在于, 所述发送模 块发送的所述 RRC 专用信令中还携带有目标辅小区的完全配置信
19、 如权利要求 15所述的基站设备, 其特征在于, 所述发送模 块具体用于: 发送 RRC专用信令, 其中携带有特定指示信息, 所述 特定指示信息为必选信息,用于指示用户设备删除所有源辅小区的配 置信息; 或者, 发送 RRC专用信令, 其中携带有需要删除配置信息 的源辅小区的标识以及特定指示信息, 所述特定指示信息为必选信 息, 用于指示用户设备根据所述 RRC专用信令中携带的源辅小区的 标识删除相应源辅小区的配置信息。
20、 如权利要求 19所述的基站设备, 其特征在于, 所述发送模 块发送的所述 RRC 专用信令中还携带有目标辅小区的完全配置信
21、 如权利要求 20所述的基站设备, 其特征在于, 当所述特定 指示信息用于指示用户设备根据所述 RRC专用信令中携带的源辅小 区的标识删除相应源辅小区的配置信息时,所述完全配置信息所属的 目标辅小区中不包括与源辅小区相同的小区。
22、 如权利要求 15所述的基站设备, 其特征在于, 所述发送模 块具体用于: 发送 RRC专用信令, 如果所述 RRC专用信令中携带 有特定指示信息, 则所述 RRC专用信令指示用户设备删除所有源辅 小区的配置信息; 如果所述 RRC专用信令中未携带有所述特定指示 信息, 则所述 RRC专用信令中还携带有需要删除配置信息的源辅小 区的标识, 所述 RRC专用信令指示用户设备根据该信令中携带的源 辅小区的标识删除相应源辅小区的配置信息;
或者, 发送 RRC专用信令, 如果所述 RRC专用信令中未携带 有特定指示信息, 则所述 RRC专用信令指示用户设备删除所有源辅 小区的配置信息; 如果所述 RRC专用信令中携带有所述特定指示信 息, 则所述 RRC专用信令中还携带有需要删除配置信息的源辅小区 的标识, 所述 RRC专用信令指示用户设备根据该信令中携带的源辅 小区的标识删除相应源辅小区的配置信息。
23、 如权利要求 22所述的基站设备, 其特征在于, 所述发送模 块发送的所述 RRC 专用信令中还携带有目标辅小区的完全配置信
24、 如权利要求 23所述的基站设备, 其特征在于, 所述 RRC专 用信令指示用户设备根据所述 RRC专用信令中携带的源辅小区的标 识删除相应源辅小区的配置信息时,所述完全配置信息所属的目标辅 小区中不包括与源辅小区相同的小区。
25、 如权利要求 15所述的基站设备, 其特征在于, 所述发送模 块具体用于: 发送 RRC专用信令, 所述 RRC专用信令中携带有用于 标识辅小区的所有标识,用于指示用户设备删除该用户设备的所有源 辅小区的配置信息。
26、 如权利要求 25所述的基站设备, 其特征在于, 所述发送模 块发送的所述 RRC 专用信令中还携带有目标辅小区的完全配置信
27、一种切换时辅小区配置的处理方法, 应用于多载波聚合系统 的切换过程, 其特征在于, 包括:
用户设备接收基站使用如权利要求 1至 14任一项所述的方法发 送的 RRC专用信令, 并根据所述 RRC专用信令的显式方式的指示, 进行辅小区配置。
28、 如权利要求 27所述的方法, 其特征在于, 所述用户设备根 据所述 RRC专用信令的显式方式的指示, 进行辅小区配置, 包括: 所述用户设备根据所述 RRC专用信令中携带的辅小区标识, 删 除该用户设备保存的相应辅小区的配置信息。
29、 如权利要求 28所述的方法, 其特征在于, 该方法还包括: 所述用户设备未保存有所述 RRC专用信令中携带的辅小区标识 对应的辅小区的配置信息时, 所述用户设备忽略所述 RRC专用信令 中的该辅小区标识。
30、 一种用户设备, 其特征在于, 包括:
接收模块, 用于接收基站使用如权利要求 1至 14任一项所述的 方法发送的 RRC专用信令;
配置模块, 用于根据所述 RRC专用信令的显式方式的指示, 进 行辅小区配置。
31、 如权利要求 30所述的用户设备, 其特征在于, 所述配置模 块具体用于, 根据所述 RRC专用信令中携带的辅小区标识, 删除该 用户设备保存的相应辅小区的配置信息。
32、 如权利要求 31所述的用户设备, 其特征在于, 所述配置模 块还用于, 所述用户设备未保存有所述 RRC专用信令中携带的辅小 区标识对应的辅小区的配置信息时, 忽略所述 RRC专用信令中的该 辅小区标识。
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