WO2011032497A1 - 一种聚合小区的重配置方法、设备和系统 - Google Patents

一种聚合小区的重配置方法、设备和系统 Download PDF

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Publication number
WO2011032497A1
WO2011032497A1 PCT/CN2010/076948 CN2010076948W WO2011032497A1 WO 2011032497 A1 WO2011032497 A1 WO 2011032497A1 CN 2010076948 W CN2010076948 W CN 2010076948W WO 2011032497 A1 WO2011032497 A1 WO 2011032497A1
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WIPO (PCT)
Prior art keywords
cell
aggregated
rrc connection
information
connection reconfiguration
Prior art date
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PCT/CN2010/076948
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English (en)
French (fr)
Inventor
赵毅
梁靖
刘佳敏
许芳丽
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Datang Mobile Communications Equipment Co Ltd
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Datang Mobile Communications Equipment Co Ltd
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Priority to EP10816701.6A priority Critical patent/EP2480025B1/en
Priority to US13/390,105 priority patent/US9603075B2/en
Publication of WO2011032497A1 publication Critical patent/WO2011032497A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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) or DMT
    • H04L5/001Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT the frequencies being arranged in component carriers
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0096Indication of changes in allocation
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/0091Signalling for the administration of the divided path, e.g. signalling of configuration information
    • H04L5/0096Indication of changes in allocation
    • H04L5/0098Signalling of the activation or deactivation of component carriers, subcarriers or frequency bands
    • 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
    • H04W36/0069Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
    • H04W36/00692Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink using simultaneous multiple data streams, e.g. cooperative multipoint [CoMP], carrier aggregation [CA] or multiple input multiple output [MIMO]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04LTRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00Arrangements affording multiple use of the transmission path
    • H04L5/003Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053Allocation of signalling, i.e. of overhead other than pilot signals
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04WWIRELESS COMMUNICATION NETWORKS
    • H04W72/00Local resource management
    • H04W72/02Selection of wireless resources by user or terminal

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method, a device, and a system for reconfiguring an aggregated cell. Background technique
  • LTE Long Term Evolution
  • 3G 3rd Generation
  • LTE Long Term Evolution
  • OFDM Orthogonal Frequency Division Multiplexing
  • MIMO Multiple Input Multiple Output
  • LTE can provide peak rates of downlink 100Mbit/s and uplink 50Mbit/s, improve the performance of cell edge users, and improve cell capacity and system delay.
  • the technical characteristics of LTE include high data rate, packet transmission, low delay, wide area coverage and backward compatibility.
  • the UE User Equipment
  • the UE User Equipment
  • the UE can work only on one carrier at a time, and one LTE cell has only one carrier, and each LTE cell is identified by a unique number in the network.
  • LTE-Advanced LTE-Advanced
  • the carrier aggregation technology is introduced to provide more bandwidth for the end user, thereby realizing the requirement of increasing the peak rate that the terminal user can use.
  • the security of the LTE system is composed of integrity protection of RRC (Radio Resource Control) signaling, encryption protection of RRC signaling, and encryption protection of user data;
  • the RRC signaling is SRB (Signaling Radio Bearer), including SRB0, SRB1, and SRB2; the user data is DRB (Data Radio Bearer).
  • SRB1 and SRB2 are the same; the encryption algorithm is the same for all bearers (for example, SRB1, SRB2, and DRB); and for SRB0, neither integrity protection is required. No encryption is required.
  • the configurable parameters used by the encryption algorithm include an encryption algorithm and an encryption key; the configurable parameters used for integrity protection include an integrity protection algorithm and an integrity protection key.
  • the network architecture of an LTE system is composed of an MME (Mobile Management Entity), an S-GW (Serving Gateway), and an eNB (enhanced Node B
  • MME Mobile Management Entity
  • S-GW Serving Gateway
  • eNB enhanced Node B
  • the interface between the eNB and the eNB is an X2 interface
  • the interface between the MME/S-GW and the eNB is an S1 interface.
  • Each eNB may further include multiple cells, and each cell may be determined by a PCI (Physical Layer ID) of the cell and a corresponding downlink carrier frequency.
  • PCI Physical Layer ID
  • the following uses ⁇ PCI, downlink carrier. Frequency ⁇ to determine different cells.
  • the ⁇ PCI, downlink carrier frequency ⁇ is uniquely identified within a certain area.
  • the UE because the single-layer cell coverage is adopted, when the UE detects another cell corresponding to the ⁇ PCI, downlink carrier frequency ⁇ , and the signal of the cell is better than the cell signal being served by the UE, it is considered The UE moves to the edge of the serving cell (cell with good signal). At this time, in order to make the ongoing service uninterrupted, handover is required, that is, the UE needs to move from one cell to another.
  • the above encryption algorithm and integrity algorithm will change; that is, an encryption key of RRC signaling, an encryption key of user data, and RRC signaling.
  • the integrity protection key needs to be changed each time it is switched.
  • each cell in the LTE system there is only one (or a pair) of carriers, and the UE can only perform data transmission and reception in one cell at a time; in order to support a wider transmission bandwidth to provide a higher transmission rate, LTE
  • the carrier aggregation technology is adopted in the -A system.
  • Each cell includes at least one (or a pair) of carriers that can be independently transmitted.
  • the aggregated multiple cells can use the same PCI, but the carrier frequencies are different between cells; the UE can simultaneously receive and transmit data on multiple (pair) carriers in multiple aggregated cell sets, thereby improving data transmission rate. .
  • the UE When the UE detects a PCI or a cell with a different frequency, it considers that a cell with a different geographical location appears. When the signal of the cell of the serving cell and the cell of the other ⁇ PCI, downlink carrier frequency ⁇ meet the handover relationship, the handover process is started. Recalculating the AS key, re-establishing entities such as PDCP, RLC, and MAC; thus, excessive data transmission interruption and data loss caused by handover; and the prior art does not deal with changes in the aggregated cell. mechanism. Summary of the invention
  • the present invention provides a method, device, and apparatus for reconfiguring an aggregated cell under carrier aggregation
  • the system in the carrier aggregation system, reconfigures the aggregated cell when the aggregated cell (carrier) of the UE changes between carriers corresponding to the aggregated cell set.
  • an embodiment of the present invention provides a method for reconfiguring an aggregated cell, including:
  • the network side device determines whether it is required to change the aggregated cell of the UE in the aggregatable cell set
  • the network side device sends an RRC connection reconfiguration message to the UE, where the RRC connection reconfiguration message carries the change information of the aggregated cell of the UE;
  • the UE receives the RRC connection reconfiguration message, and reconfigures the aggregated cell according to the RRC connection reconfiguration message.
  • the embodiment of the invention provides a network side device, including:
  • a determining module configured to determine whether the aggregated cell of the UE needs to be changed in the aggregatable cell set
  • a sending module configured to: when the determining result of the determining module is that the aggregated cell of the UE needs to be changed in the aggregatable cell set, send an RRC connection reconfiguration message to the UE, where the RRC connection reconfiguration message is carried The change information of the aggregated cell of the UE; the UE reconfigures the aggregated cell according to the RRC connection reconfiguration message.
  • An embodiment of the present invention provides a user equipment UE, including:
  • a receiving module configured to: when the network side device determines that the aggregated cell of the UE needs to be changed in the aggregatable cell set, receive an RRC connection reconfiguration message from the network side device; the RRC connection reconfiguration message carries the The change information of the aggregated cell of the UE;
  • a processing module configured to reconfigure the aggregated cell according to the RRC connection reconfiguration message received by the receiving module.
  • the embodiment of the present invention provides a reconfiguration system of an aggregated cell, including: a network side device, configured to determine whether an aggregated cell of the UE needs to be changed in an aggregated cell set; and when the judgment result is changed, the Said UE sends RRC a reconfiguration message, where the RRC connection reconfiguration message carries change information of the aggregated cell of the UE;
  • the UE is configured to receive the RRC connection reconfiguration message, and reconfigure the aggregated cell according to the RRC connection reconfiguration message.
  • the embodiment of the invention has at least the following advantages:
  • the aggregated cell of the UE may be reconfigured by using the RRC that does not carry the indication related information;
  • the same AS key performs data security processing, thereby avoiding problems such as data transmission interruption and data loss caused by frequent handover when the aggregated cell (carrier) of the UE changes within the same aggregatable cell set. Guaranteed uninterrupted transmission of data.
  • FIG. 1 is a schematic diagram of a network architecture of an LTE system in the prior art
  • FIG. 2 is a schematic flowchart of a method for reconfiguring an aggregated cell according to Embodiment 1 of the present invention
  • FIG. 3 is a schematic diagram of a relationship between keys according to an embodiment of the present invention
  • FIG. 4 is a schematic flowchart of a method for reconfiguring an aggregated cell according to Embodiment 2 of the present invention
  • FIG. 5 is a schematic diagram of an aggregated cell set used in an embodiment of the present invention
  • FIG. 6 is a schematic flowchart of a method for reconfiguring an aggregated cell according to Embodiment 3 of the present invention
  • FIG. 7 is a schematic flowchart of a method for reconfiguring an aggregated cell according to Embodiment 4 of the present invention.
  • FIG. 8 is a schematic flowchart of a method for reconfiguring an aggregated cell according to Embodiment 5 of the present invention.
  • FIG. 9 is a schematic flowchart of a method for reconfiguring an aggregated cell according to Embodiment 6 of the present invention.
  • FIG. 10 is a schematic structural diagram of a network side device according to Embodiment 7 of the present invention
  • FIG. 11 is a schematic structural diagram of a user equipment according to Embodiment 8 of the present invention.
  • a UE is proposed in the carrier aggregation system.
  • the method for reconfiguring an aggregated cell when the aggregated cell changes within the set of aggregatable cell (carrier), by using the reconfiguration method of the aggregated cell, the process of recalculating the AS key may not be performed, thereby enabling the carrier aggregation system
  • the uninterrupted transmission of data is ensured when the aggregated cell of the UE changes.
  • the aggregated cell of the UE in the present invention refers to a cell that provides services for the UE while performing aggregation in the carrier aggregation system.
  • the aggregatable cell can be understood by two types: 1. A cell that can perform carrier aggregation from the network side; 2. A cell that can perform carrier aggregation from the perspective of UE capabilities.
  • the second case is: The number of carriers that can be aggregated on the network side is five, 1-4 is one band, and 5 is one band. Since the UE can only aggregate carriers in one band, in this case, from the perspective of UE capabilities.
  • the set of polymerizable cells (carriers) is 1-4.
  • each cell includes at least one (or a pair) of carriers that can be independently transmitted. Therefore, the method for reconfiguring the aggregated cell proposed by the present invention may also be called The method of configuring the aggregate carrier.
  • the aggregated cell of the UE may be described by using an aggregated carrier of the UE, and the aggregatable cell may be described by using an aggregatable carrier. Since the process is similar, in the following implementation process, only the concept of an aggregated cell is used for description, and the aggregated carrier is not repeatedly described.
  • the first embodiment of the present invention provides a method for reconfiguring an aggregated cell, including the following steps:
  • Step 201 The network side device determines whether it is required to change the aggregated cell of the UE in the aggregatable cell set.
  • whether the aggregated cell of the UE changes within the set of the aggregatable cell includes one or more of the following: the primary serving cell of the UE changes within the set of the aggregatable cell; the service of the UE The cell changes within the set of aggregatable cells; the anchor member cells of the UE are changed within the set of aggregatable cells; all or a part of the aggregated cells of the UE are changed within the set of aggregatable cells.
  • the change of all or a part of the aggregated cells of the UE in the set of the aggregatable cells includes one or more of the following: adding a new cell on the basis of the aggregated cell of the UE; The cell is deleted on the basis of the aggregated cell; the configuration information of all or part of the cells included in the aggregated cell of the UE is changed.
  • the determining, by the network side device, whether the aggregation cell of the UE needs to be changed in the aggregatable cell set includes: determining, by the network side device, whether the aggregated cell of the UE needs to be in the aggregatable cell set according to the measurement report of the UE The network side device determines whether it is necessary to change the aggregated cell of the UE in the aggregatable cell set according to the load of each cell in the aggregatable cell set; or, the network side device determines according to the service requirement of the UE. Whether the aggregated cell of the UE needs to be changed within the set of aggregatable cells.
  • the network side device and the UE may continue to use the security algorithm and key (ie, AS key) being used for data.
  • Security processing when the aggregated cell (carrier) of the UE changes within the same set of aggregated cells, the key may not be replaced, so there is no need to rebuild entities such as PDCP and RLC, and the key replacement, PDCP, RLC, etc. are avoided.
  • the data transmission interruption time caused by the entity can also avoid data loss caused by rebuilding the above PDCP and RLC entities.
  • the network side can also aggregate 5 cells (carriers), but the network side only configures 3 aggregated cells (carriers) for the UE due to service requirements and the like;
  • the UE If the aggregation cell (carrier) needs to be changed, and the range of the change is within the above five cells (carriers), the carrier reconfiguration process may be adopted.
  • the key In the carrier reconfiguration process, the key may not be replaced, and the PDCP and the RLC are not reconstructed. Such entities ensure the uninterrupted transmission of data.
  • the primary serving cell when there are multiple serving cells in the aggregated cell of the UE, there is a concept of a primary serving cell, and the primary serving cell is for the serving cell.
  • the serving cell may have one or more of the following characteristics: 1. Listening system information; 2. Listening to Paging; 3. For KeNB* calculation; 4. Measuring reference cell; 5. Delta signaling configuration reference cell; 6. Providing NAS mobile sexual parameters (PLMN ID, TAC, ECGI); 7. Radio link failure reference cell.
  • the primary serving cell When there is a primary serving cell, the primary serving cell may have some or all of the features of the above services. When the primary serving cell has the characteristics of the above-mentioned serving cell, the corresponding feature may no longer be available to the ordinary serving cell. When there is only one serving cell in the aggregated cell of the UE, the serving cell will likely have some or all of the features of the above-mentioned serving cell.
  • the AS key can be calculated using the PCI of the primary serving cell and the downlink carrier frequency of the primary serving cell.
  • the anchor component carrier refers to a reference carrier when the system message broadcast configuration; when other carriers transmit system information, the system message configuration of the anchor component carrier needs to be referred to; the same content as the system message of the anchor component carrier can be given only The instructions are not repeated, and will not be described here.
  • the foregoing AS key includes: an encryption key of RRC signaling (indicated by KRRCenc in the embodiment of the present invention), and user data.
  • the encryption key (indicated by KUPenc in the embodiment of the present invention) and the integrity protection key of RRC signaling (indicated by KRRCint in the embodiment of the present invention) and the like.
  • the above three AS keys are all obtained by the key KeNB through a key derivation function (KDF).
  • the key KeNB is the KeNB generated by the UE and the network side device based on the primary dynamic key KASME when the UE enters the ECM-CONNECTED state, and the KASME is processed by the upper layer, because the embodiment of the present invention is directed to the foregoing three
  • the processing of the KASME and KeNB will not be described in detail. It can be seen that when the KeNB changes, the three security keys of the AS are also re-inferred and changed.
  • the target cell and the UE need to obtain a new KeNB, and calculate new KRRCenc, KUPenc and KRRCint according to the new KeNB, so that after the UE accesses the target cell, normal encryption protection can be continued.
  • the PCI and the downlink carrier frequency of the target cell are the two input parameters required for calculating the KeNB* (in addition, other input parameters are needed when calculating the KeNB*, and details are not described herein again); and the target cell and the UE can be calculated according to the calculation.
  • the obtained KeNB* obtains the KeNB, and calculates KRRCenc, KUPenc and KRRCint according to the new KeNB to perform security protection for communication with each other.
  • Step 202 When the determination result is that the change is required, the network side device sends an RRC connection reconfiguration message to the UE, where the RRC connection reconfiguration message carries the change information of the aggregated cell of the UE.
  • the change information of the aggregated cell of the UE includes one or more of the following: a frequency point information or a frequency point information index corresponding to the changed aggregated cell; a carrier configuration information corresponding to the changed aggregated cell; The frequency allocation information corresponding to the aggregated cell; the system information corresponding to the changed aggregated cell; the component carrier identifier corresponding to the changed aggregated cell; the cell identifier corresponding to the changed aggregated cell; the changed serving cell and/or Identification information of the primary serving cell.
  • the cell identifier corresponding to the changed aggregated cell may be: a physical layer cell ID corresponding to the aggregated cell; and/or a cell global ID (ECGI) corresponding to the aggregated cell; and/or a cell corresponding to the aggregated cell ID.
  • ECGI can uniquely identify a small area on a global scale. The local area ID can only uniquely identify a cell within a PLMN (Public Land Mobile-communication Network).
  • the change information of the aggregated cell of the UE further includes: MAC layer reconfiguration information and/or physical layer reconfiguration information corresponding to the changed aggregated cell, and the information may be referred to as carrier configuration information corresponding to the aggregated cell.
  • the UE when the change information of the aggregated cell of the UE carries the MAC layer reconfiguration information and/or the physical layer reconfiguration information corresponding to the changed aggregated cell, when the UE receives After the RRC connection reconfiguration message, the UE reconfigures the MAC layer entity and/or the physical layer entity according to the MAC layer reconfiguration information and/or the physical layer reconfiguration information in the RRC connection reconfiguration message.
  • the sending, by the network side device, the RRC connection reconfiguration message to the UE further includes: the network side device sending the change information of the aggregated cell carrying the UE to the UE but not carrying the mobility control information and the security configuration The RRC connection reconfiguration message of the information.
  • the network side device sends an RRC connection reconfiguration message carrying the change information of the aggregated cell of the UE but does not carry the mobility control information and the security configuration information to the UE, the UE adopts receiving the RRC connection weight.
  • the AS key used before the configuration of the message is processed securely, and a reconfiguration complete message is sent to the network side device to ensure uninterrupted data transmission.
  • the security processing performed by the UE by using the AS key used before receiving the RRC connection reconfiguration message includes one or more of the following: before the UE receives the RRC connection reconfiguration message Encrypting and decrypting data of the KUPenc key in the used AS key; the integrity of the RRC signaling by the UE using the KRRCint key in the AS key used before receiving the RRC connection reconfiguration message Protection and verification; the UE encrypts and decrypts the RRC signaling by using the KRRCenc key in the AS key used before receiving the RRC connection reconfiguration message.
  • Step 203 The UE receives the RRC connection reconfiguration message, and performs reconfiguration on the aggregated cell according to the RRC connection reconfiguration message.
  • the method further includes: determining, by the UE, whether a random access procedure is performed; and performing a random access procedure when the determination result is yes; When the judgment result is no, the random access procedure is omitted.
  • the network side device may also acquire whether the UE needs to perform a random access procedure, and deliver the acquisition result to the UE.
  • the network side device determines whether the UE needs to perform a random access procedure, and sends the random access indication information to the UE.
  • RRC connection reconfiguration message the random connection The incoming indication information is used to indicate whether the UE performs a random access procedure.
  • the network side device allocates the preamble used by the UE for random access, and carries the identifier information of the preamle in the RRC connection reconfiguration message and sends the identifier to the UE. .
  • the UE determines whether to perform the random access procedure, and further includes: determining, by the UE, whether the random access procedure is started according to whether the RRC connection reconfiguration message carries the random access indication information.
  • reconfiguring the aggregated cell according to the RRC connection reconfiguration message includes one or more of the following: the UE configures a MAC layer entity and/or a physical layer entity corresponding to the newly added aggregated cell; Deleting or resetting the MAC layer entity and/or the physical layer entity corresponding to the cell deleted from the original aggregated cell; the UE is to the MAC layer entity corresponding to the cell in the original aggregated cell still used and/or The physical layer entity is reconfigured.
  • the aggregated cell of the UE can be reconfigured;
  • the same AS key performs data security processing, thereby avoiding problems such as data transmission interruption and data loss caused by frequent handover when the aggregated cell (carrier) of the UE changes within the same aggregatable cell set. Guaranteed uninterrupted transmission of data.
  • the second embodiment of the present invention provides a method for reconfiguring an aggregated cell in a carrier aggregation system.
  • the reason for the reconfiguration of the aggregated cell is whether the aggregated cell of the UE is available. Changes occur within the aggregated cell set.
  • carrier 1, carrier 2, carrier 3, carrier 4, and carrier 5 constitute an aggregated carrier, where the carrier is corresponding to a cell, that is, may be referred to as cell 1, cell 2, cell 3, cell 4, and
  • the cell 5 is composed of the aggregated cell and the carrier index is the same as the corresponding cell index.
  • the cell that is currently serving the UE is the cell 1, the cell 2, and the cell 3 as an example.
  • the aggregated cell set in the embodiment of the present invention is a set of cells that can be aggregated to provide carrier aggregation transmission for the UE on the network side; and from the UE side, the UE is the UE.
  • a set of cells that can be aggregated together for carrier aggregation transmission for example, in FIG.
  • the number of cells that can be aggregated for the UE by the network side is five (cell 1, Cell 2, cell 3, cell 4, and cell 5); and the number of cells that the UE can aggregate together for carrier aggregation transmission is three (select cell 1, cell 2, and cell 3); further, in the embodiment of the present invention
  • the aggregated cell of the LTE-A UE is configured for the UE on the network side, and the cell that enables the UE to perform carrier aggregation transmission may include only one cell (for example, when the LTE-A UE just accesses the network, there may be only one cell) Then, the cell is also referred to as an aggregated cell of the UE; and may also include multiple cells, and details are not described herein again.
  • the method for reconfiguring the generated aggregate cell includes the following steps:
  • Step 401 The network side device determines whether it is required to change the aggregated cell of the UE in the aggregatable cell set.
  • the manner in which the network side device determines whether the aggregated cell of the UE needs to be changed in the aggregatable cell set includes: determining, by the network side device, whether the aggregated cell of the UE needs to be changed in the aggregated cell set according to the measurement report of the UE For example, when the UE measurement report indicates that the signal quality of a cell is higher than the signal quality of the current serving cell, it is determined that a change needs to be made to the UE serving cell.
  • the set condition is met (eg, the signal quality of the cell A is higher than the signal quality of the current serving cell B exceeds the set domain).
  • the value is
  • the network side device determines whether the aggregation cell of the UE needs to be changed in the aggregatable cell set, and the determining process is performed by the network side device according to the load of each cell in the aggregatable cell set, for example, when the network side device learns When there are fewer UEs in a certain cell and more UEs in the cell serving the UE1, the network side device may change the (primary) serving cell of the UE1 from a cell with more UEs to a cell with fewer UEs.
  • the network side device may notify the UE1 to set the cell 2 to be set to Its service cell will not be described here.
  • the network side determines, according to the service requirement of the UE, whether the aggregated cell of the UE needs to be changed in the set of the aggregatable cell, for example, the UE 2 starts to use two aggregated cells to send and receive two services, and then the UE2 adds another The new service is sent and received. In this case, to meet the service requirements of the UE, the network side needs to add another aggregation cell to the UE.
  • the network side device includes, but is not limited to, an RNC (Radio Network Controller), an NB (Node B, a Node B), an eNB, a relay, a base station, and the like.
  • RNC Radio Network Controller
  • NB Node B, a Node B
  • eNB eNode B
  • a base station eNode B
  • the device is not limited to the above devices, and all devices that can send RRC connection reconfiguration to the UE on the network side are within the protection scope of the present invention.
  • Step 402 When the aggregated cell of the UE needs to be changed in the aggregatable cell set, the network side device sends an RRC connection reconfiguration message including the UE aggregated cell change information to the UE.
  • the RRC connection reconfiguration message may carry related information for indicating handover, or may not carry related information for indicating handover. Further, when the RRC connection reconfiguration message carries the related information for indicating the handover, the UE needs to perform the corresponding handover procedure; and when the RRC connection reconfiguration message is not carried in the related information indicating the handover, the UE does not need to Perform the corresponding switching process. It can be seen that, in the embodiment of the present invention, the RRC connection reconfiguration message can be flexibly configured, and the RRC connection reconfiguration message not carrying the related information indicating the handover can be set (ie, the handover procedure is not performed), thereby ensuring uninterrupted transmission of data.
  • related information for indicating handover includes mobility control information and security control information; and other information carried in the RRC connection reconfiguration message includes radio resource configuration information (for example, physical layer The configuration information, the MAC configuration information, and the like, the measurement configuration information, and the like; and the foregoing information, that is, the change information of the UE aggregated cell carried in the RRC connection reconfiguration message, including but not limited to: the frequency information corresponding to the changed aggregated cell or Frequency point information index; carrier configuration information corresponding to the changed aggregated cell; frequency point configuration information corresponding to the changed aggregated cell (for example, bandwidth information corresponding to the frequency point, etc.); system information corresponding to the changed aggregated cell; The component carrier identifier corresponding to the subsequent aggregated cell; the cell identifier corresponding to the changed aggregated cell; and the identification information of the changed serving cell and/or the primary serving cell.
  • radio resource configuration information for example, physical layer The configuration information, the MAC configuration information, and the like, the measurement configuration information, and the like
  • the foregoing information
  • the cell identifier corresponding to the changed aggregated cell may be: a physical layer cell ID corresponding to the aggregated cell; and/or an aggregated cell Corresponding cell global ID (ECGI); and/or cell ID corresponding to the aggregated cell.
  • the change information of the UE aggregated cell may further include: MAC layer reconfiguration information and/or physical layer reconfiguration information corresponding to the changed aggregated cell.
  • the RRC connection reconfiguration message carries the MAC layer reconfiguration information and/or the physical layer reconfiguration information corresponding to the changed aggregated cell
  • the UE needs to reconfigure the MAC layer according to the RRC connection reconfiguration message.
  • physical layer reconfiguration information reconfiguring MAC layer entities and/or physical layer entities.
  • Step 403 The UE reconfigures its own aggregated cell according to the received RRC connection reconfiguration message.
  • the UE configures related configuration information for handover; and when the RRC connection reconfiguration message does not carry related information for indicating handover
  • the UE does not need to perform handover, that is, the UE does not update the KeNB, and does not need to recalculate KRRCenc, KUPenc and KRRCint, thereby ensuring uninterrupted transmission of data.
  • the reconfiguration of the aggregated cell of the UE according to the received RRC connection reconfiguration message includes: the UE reconfigures according to the change information of the UE aggregated cell carried in the RRC connection reconfiguration message, where Let me repeat.
  • Step 404 The UE sends a reconfiguration complete message to the network side device after the reconfiguration is completed.
  • the UE sends the reconfiguration completion message to the network side device by using the existing AS key. For example, when the UE learns that its (primary) serving cell is changed from cell 1 to cell 2 (obtained from the RRC connection reconfiguration message), the existing cell-based AS key is used to send the reconfiguration complete to the network side device.
  • the message does not need to recalculate the AS key by using the PCI and/or the downlink carrier frequency of the cell 2, so that it is not necessary to reconstruct the entities such as the PDCP and the RLC, and the uninterrupted transmission of the data is ensured, that is, the (primary) serving cell changes and The changed (primary) serving cell is still in the current aggregated cell (carrier) of the UE, and the uninterrupted transmission of data is guaranteed.
  • step 403 and step 404 it may be determined according to actual needs whether the random access procedure needs to be started. For example, if the aggregated cell of the UE changes within the set of aggregatable cells, the random access procedure is not required according to the channel condition judgment or the specification that the random access procedure may not be performed. If the aggregated cell of the UE changes within the set of aggregatable cells, according to the channel condition judgment or the specification requires that random access is required, it is required to perform a random access procedure.
  • the network side device may also acquire whether the UE needs to perform a random access procedure, and deliver the acquisition result to the UE.
  • the network side device needs to determine whether the UE needs to perform a random access procedure, and sends an RRC connection reconfiguration message carrying the random access indication information to the UE; the random access indication information is used to indicate Whether the UE performs a random access procedure.
  • the network side device allocates the preamble used by the UE for random access, and carries the identifier information of the preamle in the RRC connection reconfiguration message and sends the identifier to the UE.
  • the UE determines whether to start the random access procedure according to whether the random access indication information is carried in the RRC connection reconfiguration message.
  • the aggregated cell of the UE can be reconfigured;
  • the same AS key performs data security processing, thereby avoiding problems such as data transmission interruption and data loss caused by frequent handover when the aggregated cell (carrier) of the UE changes within the same aggregatable cell set. Guaranteed uninterrupted transmission of data.
  • the third embodiment of the present invention provides a method for performing reconfiguration of an aggregated cell.
  • a description is made by taking an example in which a serving cell changes within an aggregated cell set and does not initiate a handover process.
  • the cell in the aggregated cell set of the current network side device includes the cell 1, the cell 2, the cell 3, the cell 4, and the cell 5, and the cell that the current UE can aggregate together for carrier aggregation transmission is Cell 1, cell 2, and cell 3 (assuming the carrier index is the same as the corresponding cell index) and the serving cell Is 1.
  • the currently used security key (AS key) is calculated based on the ⁇ PCI, downlink carrier frequency ⁇ of cell 1.
  • the method for reconfiguring the aggregating cell includes the following steps:
  • Step 601 The network side device determines, according to the report information of the UE, the network side determines that the aggregated cell of the UE changes in the aggregated cell set, or the load information of each cell in the aggregatable cell set. Changes are made within the set of aggregatable cells. It is known that the serving cell of the UE needs to be changed within the set of cells that can be aggregated. In the embodiment of the present invention, the aggregation cell of the UE needs to be changed from 1, 2, 3 to 2, 3, 4, and the serving cell is changed to the cell 3 by taking the cell 1 as an example.
  • Step 602 The network side device sends an RRC connection reconfiguration message to the UE.
  • the content carried in the RRC connection reconfiguration message includes but is not limited to: (1) frequency point information (or frequency point index) and/or frequency point configuration information of the cell 2, cell 3, and cell 4 (eg, frequency point) Corresponding bandwidth); (2) reconfiguration information of the MAC layer and/or the physical layer entity corresponding to the cell 2, the cell 3, and the cell 4 (or may be referred to as configuration update information); (3) indication information of the serving cell, that is, The cell 3 needs to be notified as the serving cell (the notification process can be implemented by setting the serving cell indication bit.
  • the serving cell indication bit in a certain cell configuration information is 1, the cell is set as the serving cell, otherwise the corresponding cell is not (4)
  • the cell identifier corresponding to the changed aggregated cell may be: a physical layer cell ID corresponding to the aggregated cell; and/or a cell global ID (ECGI) corresponding to the aggregated cell; and/or a cell corresponding to the aggregated cell ID; (7) Carrier configuration information corresponding to the changed aggregated cell.
  • ECGI cell global ID
  • the indication information of the (primary) serving cell may be in the form of setting the serving cell indication bit, and may also adopt other forms, for example, through the monthly service community.
  • the configuration information carries configuration content not included in other cell configuration information to determine which cell is the (primary) serving cell.
  • Step 603 After receiving the RRC connection reconfiguration message, the UE will aggregate the cell. From 1, 2, 3, to 2, 3, 4, the serving cell 1 becomes the cell 3; the MAC layer and/or the physical layer entity corresponding to each cell is configured or updated; and according to the system information related to each cell Corresponding configuration.
  • the configuration parameters of the PDCP and/or the RLC entity are included in the RRC connection reconfiguration message, the corresponding parameters of the PDCP and/or the RLC are configured according to the indication, and details are not described herein.
  • the information indicating that the handover is not included is taken as an example, that is, the information such as the AS key is not recalculated in this step, and the PDCP and the RLC entity are not reconstructed.
  • Step 604 The UE sends a reconfiguration complete message to the network side by using the AS key calculated according to the ⁇ PCI, downlink carrier frequency ⁇ of the cell 1.
  • the RRC connection reconfiguration message may not include the cell. 2.
  • the cell 3 related entity reconfiguration information and only carries the MAC layer and/or physical layer entity reconfiguration information of the cell 1.
  • the system information and other information of the cell 2 and the cell 3 may not be carried in the RRC connection reconfiguration message, and details are not described herein.
  • the frequency information of the cell 2, the cell 3, and the cell 4 may also be indicated in the form of a bitmap if the UE knows the specific frequency.
  • the aggregationable cell set includes five aggregatable cells, and the frequency information corresponding to the UE's known aggregatable cell is: 850 MHz for cell 1, 900 MHz for cell 2, 900 MHz for cell 3, and 950 MHz for cell 4.
  • the network side device sends a bitmap of 01110 to the UE, and the UE can know that the aggregated cell is the cell 2, the cell 3, and the cell 4, and the corresponding frequency information is 900 MHz, 900 MHz, and 950 MHz, respectively.
  • the frequency point configuration information corresponding to the frequency point is also bound to the cell and the UE is known, the frequency point configuration information may not be transmitted, and the UE may know the frequency point information of the corresponding cell after knowing the aggregated cell, This will not be repeated here.
  • the fourth embodiment of the present invention provides a method for performing reconfiguration of an aggregated cell.
  • a description is made by taking an example in which a serving cell changes within an aggregated cell set and starts a handover process. It can be seen that, unlike the third embodiment, when the serving cell changes within the aggregated cell set in this embodiment, the handover process needs to be started.
  • the cells in the aggregated cell set of the current network side device are the cell 1, the cell 2, the cell 3, the cell 4, and the cell 5.
  • the carrier corresponding to the current UE is the cell 1, the cell 2, and the cell. 3, and the serving cell is cell 1.
  • the currently used AS key is calculated based on the ⁇ PCI, downlink carrier frequency ⁇ of cell 1.
  • the method for reconfiguring the aggregating cell includes the following steps:
  • Step 701 The network side device learns, according to the report information of the UE or the load information of each cell in the aggregatable cell set, that the serving cell of the UE changes within the set of the aggregated cells.
  • the aggregation cell of the UE needs to be changed from 1, 2, 3 to 2, 3, 4, and the serving cell is changed to the cell 3 by taking the cell 1 as an example.
  • Step 702 The network side device sends an RRC connection reconfiguration message to the UE (which may also be referred to as a handover command in this embodiment).
  • the content carried in the RRC connection reconfiguration message includes but is not limited to: handover indication information (eg, mobility control information, security configuration information, etc.); frequency information (or frequency) of the cell 2, the cell 3, and the cell 4. Point index) and/or frequency point configuration information; indication information of the serving cell; system information related to the cells 2, 3, 4; configuration information of the MAC layer and the physical layer entity corresponding to the cells 2, 3, 4; PDCP and RLC entities
  • the cell identifier corresponding to the changed aggregated cell may be: a physical layer cell ID corresponding to the aggregated cell; and/or a cell global ID (ECGI) corresponding to the aggregated cell; and/or a cell corresponding to the aggregated cell ID.
  • ECGI cell global ID
  • Step 703 After receiving the RRC connection reconfiguration message, the UE re-instructs and/or transforms the ⁇ PCI, downlink carrier frequency ⁇ of the serving cell according to the security configuration information. Calculating the AS key, and changing the aggregated cell from 1, 2, 3 to 2, 3, 4, serving cell 1 to cell 3; configuring or updating the MAC layer and/or the physical layer entity corresponding to each cell; And corresponding configuration according to the system information related to each cell.
  • the corresponding PDCP entity, the RLC entity, and the like need to be reconstructed because the AS key needs to be updated.
  • the recalculating AS key is specifically recalculated according to the ⁇ PCI, downlink carrier frequency ⁇ of the cell 3, and the process is not described in detail.
  • Step 704 The UE sends a reconfiguration complete message (also referred to as a handover completion message in this embodiment) to the network side by using the AS key calculated according to the ⁇ PCI, downlink carrier frequency ⁇ of the cell 3.
  • a reconfiguration complete message also referred to as a handover completion message in this embodiment
  • the RRC connection reconfiguration message may not include the cell. 2.
  • the cell 3 related entity reconfiguration information and only carries the MAC layer and/or physical layer entity reconfiguration information of the cell 1.
  • the system information and other information of the cell 2 and the cell 3 may not be carried in the RRC connection reconfiguration message, and details are not described herein.
  • the aggregated cell of the UE can be reconfigured;
  • the same AS key performs data security processing, thereby avoiding problems such as data transmission interruption and data loss caused by frequent handover when the aggregated cell (carrier) of the UE changes within the same aggregatable cell set. Guaranteed uninterrupted transmission of data.
  • the fifth embodiment of the present invention provides a method for performing reconfiguration of an aggregated cell.
  • other cells outside the serving cell are changed in the set of aggregated cells, and the handover process is not started.
  • the cell in the aggregated cell set of the current network side device includes the cell 1, the cell 2, the cell 3, the cell 4, and the cell 5, and the cell corresponding to the carrier that the current UE has aggregated is the cell 1, the cell. 2 and cell 3 and the serving cell is cell 1.
  • the currently used AS key ⁇ ⁇ is calculated at ⁇ PCI, downlink carrier frequency ⁇ of cell 1.
  • the reconfiguration method packet of the generated aggregated cell Including the following steps:
  • Step 801 The network side device learns that the aggregated cell of the UE needs to be changed from 1, 2, 3 to 1, 3, and 4, where the serving cell remains unchanged.
  • Step 802 The network side device sends an RRC connection reconfiguration message to the UE.
  • the content carried in the RRC connection reconfiguration message includes, but is not limited to, frequency point information (or frequency point index) of the cell 1, cell 3, and cell 4, and/or frequency point configuration information (eg, bandwidth corresponding to the frequency point). ; carrier configuration information of cell 1, cell 3, cell 4; reconfiguration information of the MAC layer and/or physical layer entity corresponding to cell 1, cell 3, cell 4; indication information of the serving cell; cell 1, cell 3, 4 cell-related system information; further comprising: a reconfiguration parameter that does not require the PDCP or the RLC entity to perform reconstruction; a component carrier identifier corresponding to the changed aggregated cell; and a cell identifier corresponding to the changed aggregated cell.
  • the cell identifier corresponding to the changed aggregated cell may be: a physical layer cell ID corresponding to the aggregated cell; and/or a cell global ID (ECGI) corresponding to the aggregated cell; and/or a cell corresponding to the aggregated cell ID.
  • ECGI cell global ID
  • Step 803 After receiving the RRC connection reconfiguration message, the UE changes the aggregated cell from cell 1, cell 2, and cell 3 to cell 1, cell 3, and cell 4; and corresponding to the MAC layer and/or physical of each cell. Layer entities are configured or updated; and configured according to system information related to each cell. In addition, if the configuration parameters of the PDCP and/or RLC entity are included in the RRC connection reconfiguration message, the corresponding parameters of the PDCP and/or RLC need to be configured according to the indication.
  • Step 804 The UE sends a reconfiguration complete message to the network side by using the AS key calculated according to the ⁇ PCI, downlink carrier frequency ⁇ of the cell 1.
  • the RRC connection reconfiguration message may not include the cell. 1.
  • the cell 3 related entity reconfiguration information and only carries the MAC layer and/or physical layer entity reconfiguration information of the cell 2.
  • the system information and other information of the cell 1 and the cell 3 may not be carried in the RRC connection reconfiguration message, and details are not described herein.
  • the aggregated cell of the UE can be reconfigured;
  • the same AS key performs data security processing, thereby avoiding problems such as data transmission interruption and data loss caused by frequent handover when the aggregated cell (carrier) of the UE changes within the same aggregatable cell set. Guaranteed uninterrupted transmission of data.
  • the sixth embodiment of the present invention provides a method for reconfiguring an aggregated cell.
  • the UE aggregated cell changes in the aggregated cell of the UE, and the handover process is not started.
  • the UE aggregated cell changes in the aggregated cell of the UE including but not limited to: (1) the UE transforms the monthly good service cell; (2) deletes or reconfigures some of the aggregated cells; (3) simultaneously deletes or changes the serving cell Reconfigure certain aggregated cells, etc.
  • the cell in the aggregated cell set of the current network side device includes the cell 1, the cell 2, the cell 3, the cell 4, and the cell 5, and the cell corresponding to the carrier that the current UE has aggregated is the cell 1, the cell. 2 and cell 3 and the serving cell is 1.
  • the currently used AS key is calculated based on cell 1's ⁇ PCI, downlink carrier frequency ⁇ .
  • the reconfiguration method of the aggregating cell includes the following steps:
  • Step 901 The network side device learns that the aggregated cell of the UE needs to be changed from 1, 2, 3 to 1, 3, wherein the serving cell remains unchanged.
  • Step 902 The network side device sends an RRC connection reconfiguration message to the UE.
  • the content carried in the RRC connection reconfiguration message includes but is not limited to: frequency information (or frequency point index) and/or frequency point configuration information of the cell 1 and the cell 3; MAC layer corresponding to the cell 1, the cell 3, and And/or reconfiguration information of the physical layer entity; indication information of the serving cell; system information related to the cell 1, the cell 3; and reconfiguration parameters that do not need to trigger the PDCP or the RLC entity to perform reconstruction; Member carrier identifier; a cell identifier corresponding to the changed aggregated cell.
  • the cell identifier corresponding to the changed aggregated cell may be: a physical layer cell ID corresponding to the aggregated cell; and/or a cell global ID (ECGI) corresponding to the aggregated cell; and/or a cell corresponding to the aggregated cell ID.
  • ECGI cell global ID
  • Step 903 After receiving the RRC connection reconfiguration message, the UE will aggregate the cell. From cell 1, cell 2, cell 3, to cell 1, cell 3.
  • Step 904 The UE sends a reconfiguration complete message to the network side by using the AS key calculated according to the ⁇ PCI, downlink carrier frequency ⁇ of the cell 1.
  • the RRC connection reconfiguration message may not include the cell. 1.
  • Cell 3 related entity reconfiguration information when the system information and other information of the cell 1 and the cell 3 are not required to be carried, the system information and other information of the cell 1 and the cell 3 may not be carried in the RRC connection reconfiguration message, and details are not described herein.
  • the aggregated cell of the UE can be reconfigured;
  • the same AS key performs data security processing, thereby avoiding problems such as data transmission interruption and data loss caused by frequent handover when the aggregated cell (carrier) of the UE changes within the same aggregatable cell set. Guaranteed uninterrupted transmission of data.
  • the seventh embodiment of the present invention provides a network side device, as shown in FIG. 10, including: a determining module 1001, configured to determine whether an aggregated cell of the UE needs to be changed in an aggregated cell set; wherein, the aggregation of the UE
  • the change of the cell in the set of the aggregatable cell includes one or more of the following: the primary serving cell of the UE changes within the set of the aggregatable cell; the serving cell of the UE changes within the set of the aggregatable cell
  • the anchor member cell of the UE changes within the set of aggregatable cells; all or part of the aggregated cells of the UE are changed within the set of aggregatable cells.
  • all or a part of the aggregated cells of the UE are changed in the set of aggregatable cells, including one or more of the following: adding a new cell on the basis of the aggregated cell of the UE; The UE deletes the cell based on the aggregated cell; and changes configuration information of all or part of the cells included in the aggregated cell of the UE.
  • the determining module 1001 is specifically configured to: determine, according to the measurement report of the UE, whether the aggregated cell of the UE needs to be changed in the aggregated cell set; or, according to the load of each cell in the aggregatable cell set, determine whether the The aggregated cell of the UE is gatherable The intra-cell set changes; or, according to the service requirement of the UE, it is determined whether the aggregated cell of the UE needs to be changed in the aggregated cell set.
  • the sending module 1002 is configured to: when the determining result of the determining module 1001 is that the aggregated cell of the UE needs to be changed in the aggregatable cell set, send an RRC connection reconfiguration message to the UE, where the RRC connection reconfiguration message is sent. Transmitting information of the aggregated cell of the UE; performing, by the UE, reconfiguring the aggregated cell according to the RRC connection reconfiguration message.
  • the change information of the aggregated cell of the UE includes one or more of the following: frequency point information or frequency point information index corresponding to the changed aggregated cell; carrier configuration information corresponding to the changed aggregated cell; The frequency allocation information corresponding to the aggregated cell; the system information corresponding to the changed aggregated cell; the component carrier identifier corresponding to the changed aggregated cell; the cell identifier corresponding to the changed aggregated cell; the changed serving cell and/or Identification information of the primary serving cell.
  • the cell identifier corresponding to the changed aggregated cell includes one or more of the following: a physical layer cell ID corresponding to the aggregation cell; a cell global ID corresponding to the aggregated cell; and a cell ID corresponding to the aggregated cell.
  • the sending module 1002 is further configured to: send, to the UE, an RRC connection reconfiguration message that carries MAC layer reconfiguration information and/or physical layer reconfiguration information corresponding to the changed aggregated cell, where the UE is configured according to the UE.
  • MAC layer reconfiguration information and/or physical layer reconfiguration information in the RRC connection reconfiguration message reconfiguring the MAC layer entity and/or the physical layer entity.
  • the sending module 1002 is further configured to: send, to the UE, an RRC connection reconfiguration message that carries change information of an aggregated cell of the UE but does not carry mobility control information and security configuration information; and the UE adopts the RRC to receive the RRC.
  • the AS key used before the reconfiguration message is connected for security processing.
  • the determining module 1001 is further configured to determine whether the UE needs to perform a random access process
  • the sending module 1002 is further configured to: send, by the UE, random access An RRC connection reconfiguration message indicating information; the random access indication information is used to indicate whether the UE performs a random access procedure.
  • the sending module 1002 is further configured to: determine a judgment result of the module If yes, the preamble used by the UE for random access is allocated, and the identifier information of the preamle is carried in the RRC connection reconfiguration message and sent to the UE.
  • modules of the device of the present invention may be integrated or integrated.
  • the above modules can be combined into one module, or can be further split into multiple sub-modules.
  • the embodiment of the present invention provides a user equipment (UE), as shown in FIG. 11, the method includes: a receiving module 1101, configured to receive, when the network side device determines that the aggregated cell of the UE needs to be changed in the aggregatable cell set, An RRC connection reconfiguration message of the network side device, where the RRC connection reconfiguration message carries the change information of the aggregated cell of the UE, where the change of the aggregated cell of the UE in the set of the aggregated cell includes one of the following contents: Or a plurality of: the primary serving cell of the UE changes within an aggregated cell set; the serving cell of the UE changes within an aggregated cell set; and the anchor member cell of the UE is in an aggregateable cell set A change occurs; all or a portion of the aggregated cells of the UE change within the set of aggregatable cells.
  • a receiving module 1101 configured to receive, when the network side device determines that the aggregated cell of the UE needs to be changed in the aggregatable cell set, An RRC connection reconfiguration message
  • all or a part of the aggregated cells of the UE are changed in the set of aggregatable cells, including one or more of the following: adding a new cell on the basis of the aggregated cell of the UE; The UE deletes the cell based on the aggregated cell; and changes configuration information of all or part of the cells included in the aggregated cell of the UE.
  • the change information of the aggregated cell of the UE includes one or more of the following: a frequency point information or a frequency point information index corresponding to the changed aggregated cell; a carrier configuration information corresponding to the changed aggregated cell; The frequency allocation information corresponding to the aggregated cell; the system information corresponding to the changed aggregated cell; the component carrier identifier corresponding to the changed aggregated cell; the cell identifier corresponding to the changed aggregated cell; the changed serving cell and/or Identification information of the primary serving cell.
  • the cell identifier corresponding to the changed aggregated cell includes one or more of the following: a physical layer cell ID corresponding to the aggregated cell; a global ID of the cell corresponding to the aggregated cell; and a cell ID corresponding to the aggregated cell.
  • the processing module 1102 is configured to reconfigure the aggregated cell according to the RRC connection reconfiguration message received by the receiving module 1101.
  • the change information of the aggregated cell of the UE further includes: MAC layer reconfiguration information and/or physical layer reconfiguration information corresponding to the changed aggregated cell; and when the UE is aggregated
  • the processing module 1102 is further configured to: according to the MAC address in the RRC connection reconfiguration message. Layer reconfiguration information and/or physical layer reconfiguration information, reconfiguring MAC layer entities and/or physical layer entities.
  • the processing module 1102 is further configured to receive The AS key used before the RRC connection reconfiguration message is securely processed, and a reconfiguration complete message is sent to the network side device to ensure uninterrupted data transmission.
  • the processing module 1102 is specifically configured to: encrypt and decrypt data by using a KUPenc key in an AS key used before receiving the RRC connection reconfiguration message; and before using the RRC connection reconfiguration message.
  • the integrity of the RRC signaling is protected and verified by the KRRCint key in the AS key; the RRC signaling is encrypted and decrypted by using the KRRCenc key in the AS key used before receiving the RRC connection reconfiguration message.
  • the processing module 1102 is specifically configured to perform one or more of the following: configuring a MAC layer entity and/or a physical layer entity corresponding to the newly added aggregated cell; and deleting the cell deleted from the original aggregated cell.
  • the corresponding MAC layer entity and/or physical layer entity is deleted or reset; the MAC layer entity and/or the physical layer entity corresponding to the cell in the original aggregated cell still being used are reconfigured.
  • the determining module 1103 is configured to determine whether to start the random access process before the processing module 1102 sends the reconfiguration complete message to the network side device, and start random access when the determination result is yes; Otherwise, random access is omitted. In addition, the determining module 1103 is further configured to determine whether to start the random access procedure according to whether the random access indication information is carried in the RRC connection reconfiguration message.
  • modules of the device of the present invention may be integrated or integrated.
  • the above modules can be combined into one module, or can be further split into multiple sub-modules.
  • the embodiment of the present invention further provides a reconfiguration system of an aggregated cell, including: a network side device, configured to determine whether an aggregated cell of the UE needs to be in an aggregatable cell And performing an RRC connection reconfiguration message to the UE, where the RRC connection reconfiguration message carries the change information of the aggregated cell of the UE, where the UE performs
  • the change of the aggregated cell in the set of the aggregatable cell includes one or more of the following: the primary serving cell of the UE changes within the set of the aggregatable cell; the serving cell of the UE is performed in the set of the aggregatable cell The change; the anchor member cell of the UE changes within the set of aggregatable cells; all or part of the aggregated cells of the UE change within the set of aggregatable cells.
  • all or a part of the aggregated cells of the UE are changed in the set of aggregatable cells, including one or more of the following: adding a new cell on the basis of the aggregated cell of the UE; The UE deletes the cell based on the aggregated cell; and changes configuration information of all or part of the cells included in the aggregated cell of the UE.
  • the UE is configured to receive the RRC connection reconfiguration message, and reconfigure the aggregated cell according to the RRC connection reconfiguration message.
  • the aggregated cell of the UE can be reconfigured;
  • the same AS key can be used for data security processing, thereby avoiding problems such as data transmission interruption and data loss caused by frequent handover when the cell (carrier) of the UE changes within the same aggregatable cell set. , to ensure the uninterrupted transmission of data.
  • modules in the device in the embodiment can be implemented according to the actual The embodiment description is carried out in a device distributed in the embodiment, and the corresponding change can also be made in one or more devices 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.

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Description

一种聚合小区的重配置方法、 设备和系统 本申请要求于 2009 年 9 月 18 日提交中国专利局, 申请号为 200910092584.9, 发明名称为 "一种聚合小区的重配置方法、 设备和 系统"的中国专利申请的优先权, 其全部内容通过引用结合在本申请 中。 技术领域
本发明涉及通信技术领域, 尤其涉及一种聚合小区的重配置方 法、 设备和系统。 背景技术
LTE ( Long Term Evolution, 长期演进)是 3G ( 3rd Generation, 第三代数字通信) 的演进, LTE改进并增强了 3G的空中接入技术, 采用 OFDM ( Orthogonal Frequency Division Multiplexing , 正交频分 复用)和 MIMO ( Multiple Input Multiple Output, 多输入多输出)作 为该 LTE无线网络演进的唯一标准。 在 20MHz频谱带宽下, LTE能 够提供下行 100Mbit/s与上行 50Mbit/s的峰值速率, 改善小区边缘用 户的性能, 并提高小区容量和降低系统延迟。 其中, LTE的技术特征 包括高数据速率、 分组传送、 低延迟、 广域覆盖和向下兼容。 在 LTE 系统中, UE ( User Equipment, 用户设备) 同时只能在一个载波下工 作, 而一个 LTE小区只有一个载波, 每个 LTE小区由一个在网络中 唯一的号码来标识。
此外, 随着移动终端用户数量的迅速增长, 终端用户的业务容量 呈指数增长, 为了满足持续增加的终端用户的业务需求, 需要提供更 大的带宽来满足终端用户的业务和应用所需要的更高峰值速率。而在 LTE-A ( LTE- Advanced, 高级 LTE ) 系统中, 通过引入载波聚合技术 来为终端用户提供更大的带宽,从而实现提高终端用户可使用峰值速 率的要求。 对于 LTE系统 AS ( Access Stratum, 接入层 )的安全性, 由 RRC ( Radio Resource Control, 无线资源控制)信令的完整性保护、 RRC 信令的加密保护以及用户数据的加密保护所构成; 该 RRC 信令为 SRB ( Signaling Radio Bearer, 信令无线 载), 包括 SRB0、 SRB1和 SRB2; 该用户数据为 DRB ( Data Radio Bearer, 数据无线 载)。 对 于 RRC信令的完整性保护算法, SRB1和 SRB2是相同的; 加密算法 对于所有的承载(例如, SRB1、 SRB2和 DRB ) 来说都是相同的; 而对于 SRB0, 既不需要完整性保护, 也不需要加密操作。 进一步的, 加密算法所使用的可配参数包括加密算法和加密密钥;完整性保护所 使用的可配参数包括完整性保护算法和完整性保护密钥。
如图 1所示的一种 LTE系统的网络架构, 该 LTE系统的网络侧 实体由 MME ( Mobile Management Entity, 移动管理实体) /S-GW ( Serving Gateway, 服务网关)、 eNB ( enhanced Node B, 增强型节 点 B )等组成, 而 eNB与 eNB之间的接口为 X2接口, MME/S-GW 与 eNB之间的接口为 S1接口。 每个 eNB下又可以包含多个小区, 每个小区都可以通过小区的 PCI ( Physical Layer ID, 物理层标识 )和 对应的下行载波频率确定, 为了方便描述, 下文中均以 {PCI, 下行载 波频率 }来确定不同的小区。 该 {PCI, 下行载波频率 }在一定区域内是 唯一标识的。
进一步的,在 LTE系统中由于采用单层小区覆盖, 当 UE检测到 另一个 {PCI, 下行载波频率 }所对应的小区, 且该小区的信号比正在 为 UE服务的小区信号好时, 则认为该 UE移动到了服务小区 (信号 好的小区)的边缘, 此时, 为了使正在发生的业务不中断, 需要进行 切换, 即 UE需要从一个小区移动到另一个小区。
在 LTE系统中, 当 UE从一个小区切换到了另一个小区时, 上述 的加密算法和完整性算法将会发生改变; 即 RRC信令的加密密钥、 用户数据的加密密钥以及 RRC信令的完整性保护密钥在每次切换时 都需要进行改变。
但是在现有技术中, UE从一个小区进入另一个小区时, 由于 AS 密钥 (上述的 RRC信令的加密密钥、 用户数据的加密密钥以及 RRC 信令的完整性保护密钥 )发生变化, 因此需要重建 PDCP ( Packet Data Convergence Protocol, 分组数据汇聚协议) 实体、 RLC ( Radio Link Control, 无线链路控制 ) 实体、 MAC ( Media Access Control, 媒体 访问控制) 实体等, 在重建上述实体的过程中, 网络侧和 UE之间不 能进行数据的收发操作, 从而会产生数据传输过程的中断, 并造成数 据的丢失。
另夕卜, 针对 LTE系统中每个小区只有一个(或一对)载波, UE 同一时刻只能在一个小区中进行数据收发过程;为了支持更宽的传输 带宽以提供更高的传输速率, LTE-A系统中采用了载波聚合技术,在 同一地理位置上同时存在多个使 UE通过载波聚合技术同时进行接收 的小区, 每个小区中至少包含一个(或一对)可以独立发送的载波; 可聚合的多个小区可以使用相同的 PCI, 只是各小区间的载波频率不 同; UE能够在多个可聚合小区集中的多个(对)载波上同时进行数 据的接收和发送, 从而提高数据传输速率。
可以看出, 在现有技术中并没有针对 LTE-A 系统中的载波聚合 技术中 UE所对应的聚合小区的变化进行考虑, 即当 UE所对应的聚 合小区发生变化时, 并没有对应的处理机制。
综上可以看出, 现有技术中至少存在以下缺点:
当 UE检测到 PCI或频率不同的小区时, 则认为出现了地理位置 不同的小区, 当服务小区的信号与其他 {PCI, 下行载波频率 }不同的 小区的信号满足切换关系时,将启动切换过程,并重新计算 AS密钥, 重建 PDCP、 RLC, MAC等实体; 从而形成过多的因切换而导致的 数据传输中断和数据丢失等问题;而且现有技术中并没有针对聚合小 区发生变化的处理机制。 发明内容
本发明提供一种载波聚合下发生聚合小区的重配置方法、设备和 系统, 以在载波聚合系统中, 当 UE的聚合小区 (载波)在可聚合小 区集中对应的载波间进行变化时, 对聚合小区进行重配置。
为了达到上述目的,本发明实施例提出一种聚合小区的重配置方 法, 包括:
网络侧设备判断是否需要对 UE的聚合小区在可聚合小区集内进 行变化;
当判断结果为需要进行变化时, 所述网络侧设备向所述 UE发送 RRC连接重配置消息, 所述 RRC连接重配置消息中携带所述 UE的 聚合小区的变化信息;
所述 UE接收所述 RRC连接重配置消息, 并根据所述 RRC连接 重配置消息对聚合小区进行重配置。
本发明实施例提出一种网络侧设备, 包括:
判断模块, 用于判断是否需要对 UE的聚合小区在可聚合小区集 内进行变 4匕;
发送模块, 用于当所述判断模块的判断结果为需要对 UE的聚合 小区在可聚合小区集内进行变化时, 向所述 UE发送 RRC连接重配 置消息, 所述 RRC连接重配置消息中携带所述 UE的聚合小区的变 化信息; 由所述 UE根据所述 RRC连接重配置消息对聚合小区进行 重配置。
本发明实施例提出一种用户设备 UE, 包括:
接收模块, 用于当网络侧设备判断需要对 UE的聚合小区在可聚 合小区集内进行变化时, 接收来自所述网络侧设备的 RRC连接重配 置消息; 所述 RRC连接重配置消息中携带所述 UE的聚合小区的变 化信息;
处理模块, 用于根据所述接收模块接收的 RRC连接重配置消息 对聚合小区进行重配置。
本发明实施例提出一种聚合小区的重配置系统, 包括: 网络侧设备, 用于判断是否需要对 UE的聚合小区在可聚合小区 集内进行变化; 并在判断结果为发生变化时, 向所述 UE发送 RRC 连接重配置消息, 所述 RRC连接重配置消息中携带所述 UE的聚合 小区的变化信息;
UE, 用于接收所述 RRC连接重配置消息, 并根据所述 RRC连 接重配置消息对聚合小区进行重配置。
与现有技术相比, 本发明实施例至少具有以下优点:
对于 LTE-A系统,当支持载波聚合 UE的聚合小区在同一个可聚 合小区集内发生变化时, 可以通过采用不携带指示切换相关信息的 RRC对 UE的聚合小区进行重配置; 而且还可以使用相同的 AS密钥 进行数据的安全性处理过程, 从而避免了当 UE的聚合小区 (载波) 在同一个可聚合小区集内进行变化时,频繁切换所造成的数据传输中 断以及数据丢失等问题, 保证了数据的不间断传输。 附图说明
图 1是现有技术中 LTE系统的网络架构示意图;
图 2是本发明实施例一提供的一种聚合小区的重配置方法流程 示意图;
图 3是本发明实施例中所提出的密钥之间的关系示意图; 图 4是本发明实施例二提供的一种聚合小区的重配置方法流程 示意图;
图 5是本发明实施例中所使用的可聚合小区集的示意图; 图 6是本发明实施例三提供的一种聚合小区的重配置方法流程 示意图;
图 7 是本发明实施例四提供的一种聚合小区的重配置方法流程 示意图;
图 8 是本发明实施例五提供的一种聚合小区的重配置方法流程 示意图;
图 9是本发明实施例六提供的一种聚合小区的重配置方法流程 示意图;
图 10是本发明实施例七提供的一种网络侧设备结构示意图; 图 11是本发明实施例八提供的一种用户设备结构示意图。
具体实施方式
如背景技术所述, 针对现有技术中 UE启动切换过程便需要重新 计算 AS密钥, 从而导致数据传输中断和数据丢失的问题, 本发明实 施例中提出一种在载波聚合系统中, 当 UE的聚合小区在可聚合小区 (载波)集内发生变化时的聚合小区的重配置方法, 通过使用该聚合 小区的重配置方法, 可以不进行重新计算 AS密钥的过程, 从而使得 在载波聚合系统中 UE 的聚合小区发生变化时保证数据不间断的传 输。 需要说明的是, 本发明中所述的 UE的聚合小区是指在载波聚合 系统中进行聚合的同时为 UE提供服务的小区。 可聚合小区可以有两 种理解: 1 , 从网络侧角度, 可以进行载波聚合的小区; 2, 从 UE能 力角度, 可以进行载波聚合的小区。 第二种情况是指: 设网络侧可聚 合的载波为 5个, 1-4为一个 band, 5为一个 band, 由于 UE只能聚 合一个 band内的载波, 因此这种情况下从 UE能力角度可聚合小区 (载波) 集就为 1-4。
本发明中所述方法针对这两种可聚合小区的理解都适用。 另夕卜, 如背景技术中所述,在载波聚合系统中,每个小区中至少包含一个(或 一对)可以独立发送的载波, 因此本发明所提出的聚合小区的重配置 方法也可称为聚合载波的配置方法。 相应地, UE的聚合小区可采用 UE的聚合载波进行描述, 可聚合小区可采用可聚合载波进行描述。 由于过程类似, 因此在以下实施过程中, 只采用聚合小区的概念进行 描述, 对聚合载波不再进行重复描述。
下面将结合本发明中的附图, 对本发明中的技术方案进行清楚、 完整地描述, 显然, 所描述的实施例仅仅是本发明的一部分实施例, 而不是全部的实施例。基于本发明中的实施例, 本领域普通技术人员 在没有做出创造性劳动前提下所获得的所有其他实施例,都属于本发 明保护的范围。 如图 2所示, 本发明实施例一提供一种聚合小区的重配置方法, 包括以下步骤:
步骤 201 , 网络侧设备判断是否需要对 UE的聚合小区在可聚合 小区集内进行变化。
具体的, 所述 UE的聚合小区是否在可聚合小区集内发生变化包 括以下内容中的一种或几种: 所述 UE的主服务小区在可聚合小区集 内进行变化; 所述 UE的服务小区在可聚合小区集内进行变化; 所述 UE的锚点成员小区在可聚合小区集内进行变化; 所述 UE的所有或 部分已聚合小区在可聚合小区集内进行变化。 其中, 所述 UE的所有 或部分已聚合小区在可聚合小区集内发生变化包括以下内容中的一 种或几种: 在所述 UE 已聚合小区的基础上添加新的小区; 在所述 UE已聚合小区的基础上删除小区; 改变所述 UE已聚合小区中所包 含的所有或部分小区的配置信息。
进一步的, 所述网络侧设备判断是否需要对 UE的聚合小区在可 聚合小区集内进行变化包括: 所述网络侧设备根据 UE的测量上报判 断是否需要对 UE的聚合小区在可聚合小区集内进行变化; 或, 所述 网络侧设备根据可聚合小区集内各小区的负荷判断是否需要对 UE的 聚合小区在可聚合小区集内进行变化; 或, 所述网络侧设备根据 UE 的业务需求判断是否需要对 UE的聚合小区在可聚合小区集内进行变 化。
需要说明的是, 当 UE的聚合小区 (载波)在同一个可聚合小区 集内进行变化时, 网络侧设备和 UE可以继续使用正在使用的安全算 法和密钥(即 AS密钥 )进行数据的安全性处理, UE的聚合小区(载 波)在同一个可聚合小区集内进行变化时, 可以不更换密钥, 因此不 需要重建 PDCP、 RLC等实体, 避免了更换密钥、 重建 PDCP、 RLC 等实体时所造成的数据传输中断时间, 也可以避免重建上述 PDCP、 RLC实体时所造成的数据丢失。 例如, 当 UE支持 5个小区 (载波 ) 的聚合, 网络侧也可以聚合 5个小区 (载波), 但网络侧由于业务需 求等因素只为该 UE配置了 3个聚合小区 (载波) 时; 如果该 UE的 聚合小区(载波)需要发生变化, 且该变化范围在上述 5个小区(载 波)之内时, 可以采用载波重配置过程, 该载波重配置过程中, 可以 不更换密钥,不重建 PDCP、 RLC等实体,保证了数据的不间断传输。
本发明实施例中, 当 UE的聚合小区中存在多个服务小区时, 将 会存在主服务小区的概念, 该主服务小区是针对该服务小区而言的。 服务小区可能具有以下一个或多个特征: 1、 监听系统信息; 2、 监听 Paging; 3、 用于 KeNB*计算; 4、 测量参考小区; 5、 Delta信令配置 参考小区; 6、 提供 NAS移动性参数(PLMN ID、 TAC、 ECGI ); 7、 无线链路失败参考小区等。
当存在主服务小区时,主服务小区可能具有上述服务所具有的部 分或全部特征。 当主服务小区具有上述服务小区具有的特征时, 相应 的特征对于普通的服务小区可以不再具有。 当 UE的聚合小区中只存 在一个服务小区时,该服务小区将可能具有上述服务小区所具有的部 分或所有特征。 在发生切换时 AS密钥可以采用主服务小区的 PCI和 主服务小区的下行载波频率进行计算。
进一步的, 在载波聚合时, 由于各载波上需要广播的系统消息存 在很多重复的内容, 为了解决该重复问题, 可能引入锚点 (anchor ) 成员载波的概念。该锚点成员载波是指系统消息广播配置时的参考载 波; 当其他载波发送系统信息时需要参考该锚点成员载波的系统消息 配置; 与该锚点成员载波的系统消息相同的内容可以只给出指示, 不 进行重复发送, 在此不再赘述。
具体的, 如图 3所示, 为密钥间的关系示意图; 可以看出, 上述 的 AS密钥包括: RRC信令的加密密钥(本发明实施例中以 KRRCenc 来表示)、 用户数据的加密密钥(本发明实施例中以 KUPenc来表示) 以及 RRC信令的完整性保护密钥(本发明实施例中以 KRRCint来表 示)等。 其中, 上述 3个 AS密钥都是密钥 KeNB通过密钥推导函数 ( KDF )得出的。 该密钥 KeNB 是 UE进入到 ECM-CONNECTED 状态时, UE和网络侧设备基于主动态密钥 KASME所生成的 KeNB , 而该 KASME由高层处理得到,由于本发明实施例是针对上述的 3个 AS密钥的, 不再详加赘述该 KASME和 KeNB的处理过程。 可以看 出, 当 KeNB变化时, AS的三个安全密钥也要重新进行推导并发生 变化。 而对于现有的切换过程, 目标小区和 UE需要获得新的 KeNB, 并根据该新的 KeNB计算新的 KRRCenc, KUPenc和 KRRCint, 以便 使 UE接入到目标小区之后, 可以继续进行正常的加密保护和完整性 保护。 而目标小区的 PCI和下行载波频率是计算 KeNB*时所需的两 个输入参数(此外, 计算 KeNB*时还需要其他的输入参数, 在此不 再赘述);而目标小区和 UE可以根据计算得到的 KeNB* 获得 KeNB, 并根据新的 KeNB计算 KRRCenc, KUPenc和 KRRCint来进行彼此 通信的安全性保护。
步骤 202, 当判断结果为需要进行变化时, 所述网络侧设备向所 述 UE发送 RRC连接重配置消息, 所述 RRC连接重配置消息中携带 所述 UE的聚合小区的变化信息。 其中, 所述 UE的聚合小区的变化 信息包括以下内容中的一种或几种: 变化后的聚合小区对应的频点信 息或频点信息索引; 变化后的聚合小区对应的载波配置信息; 变化后 的聚合小区对应的频点配置信息; 变化后的聚合小区对应的系统信 息; 变化后的聚合小区对应的成员载波标识; 变化后的聚合小区对应 的小区标识; 变化后的服务小区和 /或主服务小区的标识信息。 需要 说明的是变化后的聚合小区对应的小区标识, 可以为: 聚合小区对应 的物理层小区 ID; 和 /或, 聚合小区对应的小区全球 ID ( ECGI ); 和 /或,聚合小区对应的小区 ID。 ECGI可以在全球范围内唯一标识一个 小 区 , 本地小 区 ID 只 可以在一个 PLMN ( Public Land Mobile-communication Network, 公众陆地移动通信网) 内部唯一标 识一个小区。
进一步的, 所述 UE的聚合小区的变化信息还包括: 变化后的聚 合小区对应的 MAC层重配置信息和 /或物理层重配置信息,这些信息 又可称为聚合小区对应的载波配置信息。
而所述 UE的聚合小区的变化信息中携带所述变化后的聚合小区 对应的 MAC层重配置信息和 /或物理层重配置信息时, 当 UE接收到 所述 RRC连接重配置消息之后, 所述 UE根据所述 RRC连接重配置 消息中的 MAC层重配置信息和 /或物理层重配置信息, 重配置 MAC 层实体和 /或物理层实体。
进一步的, 所述网络侧设备向所述 UE发送 RRC连接重配置消 息还包括: 所述网络侧设备向所述 UE发送携带 UE的聚合小区的变 化信息但不携带移动性控制信息和安全性配置信息的 RRC连接重配 置消息。 而当所述网络侧设备向所述 UE发送携带 UE的聚合小区的 变化信息但不携带移动性控制信息和安全性配置信息的 RRC连接重 配置消息时, 所述 UE采用接收所述 RRC连接重配置消息前所使用 的 AS密钥进行安全处理,并向所述网络侧设备发送重配置完成消息, 以保证数据不间断传输。
具体的, 所述 UE采用接收所述 RRC连接重配置消息前所使用 的 AS密钥进行安全处理包括以下内容中的一种或几种: 所述 UE采 用接收所述 RRC连接重配置消息前所使用的 AS密钥中的 KUPenc 密钥的对数据进行加解密; 所述 UE采用接收所述 RRC连接重配置 消息前所使用的 AS密钥中的 KRRCint密钥的对 RRC信令的完整性 进行保护和验证; 所述 UE采用接收所述 RRC连接重配置消息前所 使用的 AS密钥中的 KRRCenc密钥对 RRC信令进行加解密。
步骤 203 , 所述 UE接收所述 RRC连接重配置消息, 并根据所述 RRC连接重配置消息对聚合小区进行重配置。
本发明实施例中, 根据所述 RRC连接重配置消息对聚合小区进 行重配置之后, 还包括: 所述 UE判断是否进行随机接入过程; 并在 判断结果为是时, 进行随机接入过程; 在判断结果为否时, 省略随机 接入过程。
需要说明的是, 对于该 UE的随机接入过程, 还可以由网络侧设 备获取 UE是否需要进行随机接入过程, 并将获取结果下发给该 UE。 此时, 在所述网络侧设备向所述 UE发送 RRC连接重配置消息之前, 所述网络侧设备判断所述 UE是否需要进行随机接入过程, 并向所述 UE发送携带随机接入指示信息的 RRC连接重配置消息;所述随机接 入指示信息用于指示 UE是否进行随机接入过程。 进一步的, 在判断 结果为是时, 所述网络侧设备分配所述 UE用于随机接入时使用的 preamble,并将 preamle的标识信息携带在所述 RRC连接重配置消息 中发送给所述 UE。 在 UE侧, 所述 UE判断是否进行随机接入过程, 还包括: 所述 UE根据所述 RRC连接重配置消息中是否携带随机接 入指示信息来判断是否启动随机接入过程。
进一步的, 根据所述 RRC连接重配置消息对聚合小区进行重配 置包括以下内容中的一种或几种: 所述 UE对新增加聚合小区对应的 MAC层实体和 /或物理层实体进行配置; 所述 UE对从原聚合小区中 删除的小区对应的 MAC层实体和 /或物理层实体进行删除或重置;所 述 UE对仍然使用的原聚合小区中的小区对应的 MAC层实体和 /或物 理层实体进行重配置。
可见, 通过使用本发明提供的方法, 对于 LTE-A 系统, 当支持 载波聚合 UE的聚合小区在同一个可聚合小区集内发生变化时, 可以 对 UE的聚合小区进行重配置; 而且还可以使用相同的 AS密钥进行 数据的安全性处理过程, 从而避免了当 UE的聚合小区 (载波)在同 一个可聚合小区集内进行变化时,频繁切换所造成的数据传输中断以 及数据丢失等问题, 保证了数据的不间断传输。
如图 4所示, 本发明实施例二提供一种在载波聚合系统中, 进行 聚合小区的重配置方法, 本实施例中, 需要进行聚合小区的重配置的 原因是 UE的聚合小区是否在可聚合小区集内发生变化。如图 5所示, 载波 1、 载波 2、 载波 3、 载波 4和载波 5组成聚合载波, 其中, 载 波是与小区相对应的, 即可以称为小区 1、 小区 2、 小区 3、 小区 4 和小区 5组成聚合小区 叚设载波索引与所对应的小区索引相同); 以当前为 UE提供服务的小区为小区 1、 小区 2和小区 3为例进行说 明。需要说明的是,本说明实施例中的可聚合小区集,从网络侧来说, 是该网络侧能够聚合在一起为 UE提供载波聚合传输的小区集合; 而 从 UE侧来说, 是该 UE能够聚合在一起进行载波聚合传输的小区集 合; 例如, 图 5中, 网络侧能够为该 UE聚合的小区为 5个(小区 1、 小区 2、 小区 3、 小区 4和小区 5 ); 而该 UE所能够聚合在一起进行 载波聚合传输的小区数目为 3个(选择小区 1、 小区 2和小区 3 ); 此 外, 在本发明实施例中, LTE-A UE的聚合小区为网络侧为 UE配置, 使该 UE能够进行载波聚合传输的小区,可能只包含一个小区(例如, 在 LTE-A UE刚接入网络时, 可能只有一个小区, 那么该小区也称为 UE的聚合小区); 也可能包含多个小区, 在此不再赘述。
具体的, 该发生聚合小区的重配置方法包括以下步骤:
步骤 401 , 网络侧设备判断是否需要对 UE的聚合小区在可聚合 小区集内进行变化。 其中, 该网络侧设备判断是否需要对 UE的聚合 小区在可聚合小区集内进行变化的方式包括: 网络侧设备根据 UE的 测量上报判断是否需要对 UE 的聚合小区在可聚合小区集内进行变 化; 例如, 当 UE测量上报指示某小区的信号质量高于当前服务小区 的信号质量, 则确定需要对 UE服务小区发生变化。 举例说明为: 当 UE测量上报指示小区 A的信号质量高于当前服务小区 B的信号质 量, 在满足设定条件(如: 小区 A的信号质量高于当前服务小区 B 的信号质量超过设定域值时), 则确定需要将 UE的服务小区变为小 区 。 或, 网络侧设备判断是否需要对 UE的聚合小区在可聚合小区 集内进行变化,该判断过程为网络侧设备根据可聚合小区集内各小区 的负荷进行判断的,例如,当网络侧设备获知某个小区下的 UE较少, 而为 UE1提供服务的小区下 UE较多时, 网络侧设备可以将 UE1的 (主)服务小区从 UE较多的小区变更为 UE较少的小区。 举例说明 为: 当网络侧设备获知小区 1 ( UE1当前的服务小区) 同时为 100个 UE提供服务, 而小区 2同时为 10个 UE提供服务时, 该网络侧设备 可以通知 UE1将小区 2设为它的服务小区, 在此不再赘述。 或, 网 络侧根据 UE的业务需求判断是否需要对 UE的聚合小区在可聚合小 区集内进行变化, 例如: UE2开始时使用 2个聚合小区进行 2个业务 的收发,后来 UE2又增加了一种新业务的收发,这时为满足 UE的业 务需求, 网络侧判断需要再给 UE增加一个聚合小区。 举例说明为: UE2开始使用小区 1和小区 2进行数据收发, 当 UE的业务需求增加 时, 网络侧判断给 UE2在增加小区 3进行数据收发, 该网络侧将增 加小区 3后的聚合小区信息和其它相关的配置信息通知给 UE, 在此 不再赘述。本发明实施例中,该网络侧设备包括但不限于 RNC( Radio Network Controller, 无线网络控制器)、 NB ( Node B, 节点 B )、 eNB、 Relay、 基站等, 需要说明的是, 该网络侧设备并不局限于上述设备, 所有位于网络侧可以向 UE发送 RRC连接重配置的设备均在本发明 保护范围之内。
步骤 402, 当需要对 UE的聚合小区在可聚合小区集内进行变化 时,网络侧设备向 UE发送包含 UE聚合小区变化信息的 RRC连接重 配置消息。
需要说明的是, 在本发明实施例中, 该 RRC连接重配置消息中 可以携带用于指示切换的相关信息,也可以不携带用于指示切换的相 关信息。 进一步的, 当 RRC连接重配置消息中携带了用于指示切换 的相关信息时, UE需要执行对应的切换过程; 而当 RRC连接重配置 消息中没有携带于指示切换的相关信息时, UE不需要执行对应的切 换过程。 可见, 本发明实施例中, 可以灵活配置 RRC连接重配置消 息, 可以通过设置不携带于指示切换的相关信息的 RRC连接重配置 消息(即不进行切换流程), 从而保证数据的不间断传输。 此外, 在 本发明实施例中,用于指示切换的相关信息包括移动性控制信息和安 全性控制信息; 而该 RRC连接重配置消息中携带的其他信息, 包括 无线资源配置信息(例如, 物理层配置信息、 MAC配置信息等), 测 量配置信息等; 而上述信息即该 RRC连接重配置消息中携带的 UE 聚合小区的变化信息, 包括但不限于: 变化后的聚合小区对应的频点 信息或频点信息索引; 变化后的聚合小区对应的载波配置信息; 变化 后的聚合小区对应的频点配置信息(例如, 频点对应的带宽信息等); 变化后的聚合小区对应的系统信息;变化后的聚合小区对应的成员载 波标识; 变化后的聚合小区对应的小区标识; 变化后的服务小区和 / 或主服务小区的标识信息。需要说明的是变化后的聚合小区对应的小 区标识, 可以为: 聚合小区对应的物理层小区 ID; 和 /或, 聚合小区 对应的小区全球 ID ( ECGI ); 和 /或, 聚合小区对应的小区 ID。 进一 步的, UE聚合小区的变化信息还可以包括: 变化后的聚合小区对应 的 MAC层重配置信息和 /或物理层重配置信息。 而当该 RRC连接重 配置消息中携带了变化后的聚合小区对应的 MAC层重配置信息和 / 或物理层重配置信息时, UE需要根据所述 RRC连接重配置消息中的 MAC层重配置信息和 /或物理层重配置信息, 重配置 MAC层实体和 / 或物理层实体。
步骤 403, UE根据接收到的 RRC连接重配置消息对自身的聚合 小区进行重配置。 其中, 当该 RRC连接重配置消息中携带了用于指 示切换的相关信息时, 该 UE配置用于切换的相关配置信息; 而当该 RRC连接重配置消息中没有携带用于指示切换的相关信息时, 该 UE 不需要进行切换, 即 UE 不会更新 KeNB , 继而不需要重新计算 KRRCenc, KUPenc和 KRRCint, 从而保证数据的不间断传输。 本发 明实施例中, UE根据接收到的 RRC连接重配置消息对自身的聚合小 区进行重配置具体包括: UE根据 RRC连接重配置消息中携带的 UE 聚合小区的变化信息进行重配置, 在此不再赘述。
步骤 404, UE在重配置完成后向网络侧设备发送重配置完成消 息。 其中, 当该 RRC连接重配置消息中没有携带用于指示切换的相 关信息时, 该 UE将使用现有的 AS密钥向网络侧设备发送重配置完 成消息。 例如, 当 UE获知自身的 (主)服务小区由小区 1变更为小 区 2 (从 RRC连接重配置消息中获得) 时, 使用现有的基于小区 1 的 AS密钥向网络侧设备发送重配置完成消息, 而不需要使用小区 2 的 PCI和 /或下行载波频率重新计算 AS密钥,从而不需要重建 PDCP、 RLC 等实体, 保证了数据的不间断传输, 即在(主)服务小区发生 变化且变化后的 (主)服务小区仍在 UE当前的聚合小区 (载波) 内 时, 保证了数据的不间断传输。
需要说明的是, 在本发明实施例中, 聚合小区的概念和聚合载波 的概念是相同的,其原因是现有企业中有采用聚合载波概念进行描述 的, 也有采用聚合小区进行描述的, 在此不再赘述。 进一步需要说明的是, 在本发明实施例中, 在步骤 403 和步骤 404之间, 还可以根据实际需要判断是否需要启动随机接入过程。 例 如, 如果 UE的聚合小区在可聚合小区集内变化时, 根据信道状况判 断或在规范中约定可以不进行随机接入过程,则不需要进行随机接入 过程。 如果 UE的聚合小区在可聚合小区集内变化时, 根据信道状况 判断或在规范中约定需要进行随机接入,则规定需要进行随机接入过 程。
此外, 对于该 UE 的随机接入过程, 还可以由网络侧设备获取 UE是否需要进行随机接入过程, 并将获取结果下发给该 UE。 此时, 所述网络侧设备需要判断所述 UE是否需要进行随机接入过程, 并向 所述 UE发送携带随机接入指示信息的 RRC连接重配置消息; 所述 随机接入指示信息用于指示 UE是否进行随机接入过程。 进一步的, 在判断结果为是时, 所述网络侧设备分配所述 UE用于随机接入时使 用的 preamble, 并将 preamle的标识信息携带在所述 RRC连接重配 置消息中发送给所述 UE。 在 UE侧, 所述 UE根据所述 RRC连接重 配置消息中是否携带随机接入指示信息来判断是否启动随机接入过 程。
可见, 通过使用本发明提供的方法, 对于 LTE-A 系统, 当支持 载波聚合 UE的聚合小区在同一个可聚合小区集内发生变化时, 可以 对 UE的聚合小区进行重配置; 而且还可以使用相同的 AS密钥进行 数据的安全性处理过程, 从而避免了当 UE的聚合小区 (载波)在同 一个可聚合小区集内进行变化时,频繁切换所造成的数据传输中断以 及数据丢失等问题, 保证了数据的不间断传输。
如图 6所示,本发明实施例三提供一种进行聚合小区的重配置方 法, 本实施例中, 以服务小区在可聚合的小区集内发生变化, 且不启 动切换过程为例进行说明。 继续以图 5为例, 当前网络侧设备的可聚 合小区集中的小区包括小区 1、 小区 2、 小区 3、 小区 4、 和小区 5, 而当前 UE所能够聚合在一起进行载波聚合传输的小区为小区 1、 小 区 2和小区 3 (假设载波索引与所对应的小区索引相同)且服务小区 为 1。 当前所使用的安全性密钥 (AS密钥)是基于小区 1的 {PCI, 下行载波频率 }进行计算的。 该发生聚合小区的重配置方法包括以下 步骤:
步骤 601 , 网络侧设备根据 UE的上报信息 (网络侧判断 UE的 聚合小区在可聚合小区集内进行变化 ), 或可聚合小区集内各小区的 负荷信息(网络侧设备判断 UE的聚合小区在可聚合小区集内进行变 化)获知 UE的服务小区需要在可聚合的小区集内进行变化。 其中, 本发明实施例中以需要将 UE的聚合小区由 1、 2、 3, 变为 2、 3、 4, 服务小区由于小区 1变为小区 3为例进行说明。
步骤 602, 网络侧设备向 UE发送 RRC连接重配置消息。 其中, 该 RRC连接重配置消息中携带的内容包括但不限于: (1 ) 小区 2、 小区 3、 小区 4的频点信息 (或频点索引)和 /或频点配置信息 (如: 频点对应的带宽); (2 ) 小区 2、 小区 3、 小区 4对应的 MAC层和 / 或物理层实体的重配置信息 (或可称为配置更新信息); ( 3 )服务小 区的指示信息, 即需要通知 UE小区 3为服务小区(该通知过程可以 通过设置服务小区指示 bit实现, 例如, 当某个小区配置信息中的服 务小区指示 bit为 1时, 该小区设为服务小区, 否则对应小区不是服 务小区); (4 ) 小区 2、 3、 4相关的系统信息; 此外, 还可以包括不 需要引发 PDCP或 RLC实体进行重建的重配置参数, 例如: 定时器 的配置值; (5 )变化后的聚合小区对应的成员载波标识; (6 )变化后 的聚合小区对应的小区标识。需要说明的是变化后的聚合小区对应的 小区标识, 可以为: 聚合小区对应的物理层小区 ID; 和 /或, 聚合小 区对应的小区全球 ID ( ECGI ); 和 /或, 聚合小区对应的小区 ID; ( 7 ) 变化后的聚合小区对应的载波配置信息。
需要说明的是, (主)服务小区的指示信息 (或称(主)服务小 区的标识信息)可以采用上述设置服务小区指示 bit的形式, 还可以 采用其它形式, 例如, 通过月良务小区的配置信息中携带其它小区配置 信息中没有的配置内容, 来判断哪个小区为 (主)服务小区。
步骤 603, UE在接收到该 RRC连接重配置消息后, 将聚合小区 由 1、 2、 3, 变为 2、 3、 4, 服务小区 1变为小区 3; 对各小区对应 的 MAC层和 /或物理层实体进行配置或更新;并根据各小区相关的系 统信息进行相应配置。 此外, 如果 RRC 连接重配置消息中包含了 PDCP和 /或 RLC实体的配置参数时, 则需要根据指示对 PDCP和 /或 RLC相应参数进行配置, 在此不再赘述。 由于本发明实施例中以不 包含指示切换的信息为例进行说明, 即本步骤中不重新计算 AS密钥 等信息, 也不重建 PDCP、 RLC实体。
步骤 604, UE利用基于小区 1的 {PCI, 下行载波频率 }计算得到 的 AS密钥向网络侧发送重配置完成消息。
需要说明的是, 本发明实施例中, 当不需要对小区 2、 小区 3的 相关实体(MAC层和 /或物理层实体)进行重配置时, 该 RRC连接 重配置消息中也可以不包含小区 2、 小区 3相关的实体重配置信息, 而只携带小区 1的 MAC层和 /或物理层实体重配置信息。 类似的, 当 不需要携带小区 2、 小区 3的系统信息和其它信息时, 该 RRC连接 重配置消息中也可以不携带小区 2、 小区 3的系统信息和其它信息, 在此不再赘述。
另外, 小区 2、 小区 3、 小区 4的频点信息在 UE已知具体频点 的情况下还可以通过 bitmap 的形式指示。 例如, 设可聚合小区集中 包含了 5个可聚合小区, 而 UE已知可聚合小区所对应的频点信息分 别为: 小区 1为 850MHz, 小区 2为 900MHz, 小区 3为 900MHz, 小区 4为 950MHz, 小区 5为 1000MHz时, 该网络侧设备向 UE发 送 01110的 bitmap, UE便可以知道聚合小区为小区 2、 小区 3、 小区 4, 而对应的频点信息分别为: 900MHz, 900MHz和 950MHz。 此外, 如果频点对应的频点配置信息也和小区进行绑定且 UE已知时, 则频 点配置信息也可以不发送, UE在知道聚合小区后便可以知道对应小 区的频点信息, 在此不再赘述。
可见, 通过使用本发明提供的方法, 对于 LTE-A 系统, 当支持 载波聚合 UE的聚合小区在同一个可聚合小区集内发生变化时, 可以 对 UE的聚合小区进行重配置; 而且还可以使用相同的 AS密钥进行 数据的安全性处理过程, 从而避免了当 UE的聚合小区 (载波)在同 一个可聚合小区集内进行变化时,频繁切换所造成的数据传输中断以 及数据丢失等问题, 保证了数据的不间断传输。
如图 7所示,本发明实施例四提供一种进行聚合小区的重配置方 法, 本实施例中, 以服务小区在可聚合的小区集内发生变化, 且启动 切换过程为例进行说明。 可以看出, 与实施例三不同的是, 本实施例 中当服务小区在可聚合的小区集内发生变化时, 需要启动切换过程。 继续以图 5为例,当前网络侧设备的可聚合小区集中的小区为小区 1、 小区 2、 小区 3、 小区 4、 小区 5, 当前 UE已聚合的载波对应小区为 小区 1、 小区 2、 小区 3, 且服务小区为小区 1。 当前使用的 AS密钥 基于小区 1的 {PCI, 下行载波频率 }进行计算的。 该发生聚合小区的 重配置方法包括以下步骤:
步骤 701 , 网络侧设备根据 UE的上报信息或可聚合小区集内各 小区的负荷信息获知 UE的服务小区在可聚合的小区集内进行变化。 其中, 本发明实施例中以需要将 UE的聚合小区由 1、 2、 3, 变为 2、 3、 4, 服务小区由于小区 1变为小区 3为例进行说明。
步骤 702, 网络侧设备向 UE发送 RRC连接重配置消息(本实施 例中还可以称为切换命令)。 其中, 该 RRC连接重配置消息中携带的 内容包括但不限于: 切换指示信息(例如: 移动性控制信息、 安全性 配置信息等); 小区 2、 小区 3、 小区 4的频点信息(或频点索引 )和 /或频点配置信息; 服务小区的指示信息; 小区 2、 3、 4相关的系统 信息; 小区 2、 3、 4对应的 MAC层和物理层实体的配置信息; PDCP 和 RLC实体进行重建时的重配置参数; 变化后的聚合小区对应的成 员载波标识; 变化后的聚合小区对应的小区标识。 需要说明的是变化 后的聚合小区对应的小区标识, 可以为: 聚合小区对应的物理层小区 ID; 和 /或, 聚合小区对应的小区全球 ID ( ECGI ); 和 /或, 聚合小区 对应的小区 ID。
步骤 703, UE在接收到上述 RRC连接重配置消息后, 根据安全 性配置信息指示和 /或变换后的服务小区的 {PCI, 下行载波频率 }重新 计算 AS密钥, 并将聚合小区由 1、 2、 3, 变为 2、 3、 4, 服务小区 1 变为小区 3; 对各小区对应的 MAC层和 /或物理层实体进行配置或更 新; 并根据各小区相关的系统信息进行相应配置。 本发明实施例中, 由于需要更新 AS密钥,即需要重建对应的 PDCP实体、 RLC实体等。 其中,该重新计算 AS密钥具体为根据小区 3的 {PCI,下行载波频率 } 进行重新计算, 该过程不再详细赘述。
步骤 704, UE利用基于小区 3的 {PCI, 下行载波频率 }计算得到 的 AS密钥向网络侧发送重配置完成消息(本实施例中又称为切换完 成消息)。
需要说明的是, 本发明实施例中, 当不需要对小区 2、 小区 3的 相关实体(MAC层和 /或物理层实体)进行重配置时, 该 RRC连接 重配置消息中也可以不包含小区 2、 小区 3相关的实体重配置信息, 而只携带小区 1的 MAC层和 /或物理层实体重配置信息。 类似的, 当 不需要携带小区 2、 小区 3的系统信息和其它信息时, 该 RRC连接 重配置消息中也可以不携带小区 2、 小区 3的系统信息和其它信息, 在此不再赘述。
可见, 通过使用本发明提供的方法, 对于 LTE-A 系统, 当支持 载波聚合 UE的聚合小区在同一个可聚合小区集内发生变化时, 可以 对 UE的聚合小区进行重配置; 而且还可以使用相同的 AS密钥进行 数据的安全性处理过程, 从而避免了当 UE的聚合小区 (载波)在同 一个可聚合小区集内进行变化时,频繁切换所造成的数据传输中断以 及数据丢失等问题, 保证了数据的不间断传输。
如图 8所示,本发明实施例五提供一种进行聚合小区的重配置方 法, 本实施例中, 以服务小区外的其他小区在可聚合的小区集内发生 变化, 且不启动切换过程为例进行说明。 继续以图 5为例, 当前网络 侧设备的可聚合小区集中的小区包括小区 1、小区 2、小区 3、小区 4、 和小区 5, 而当前 UE已聚合的载波对应的小区为小区 1、 小区 2和 小区 3且服务小区为小区 1。 当前所使用的 AS密钥^ ^于小区 1的 {PCI, 下行载波频率 }进行计算的。 该发生聚合小区的重配置方法包 括以下步骤:
步骤 801 , 网络侧设备获知需要将 UE的聚合小区由 1、 2、 3, 变为 1、 3、 4, 其中, 该服务小区保持不变。
步骤 802, 网络侧设备向 UE发送 RRC连接重配置消息。 其中, 该 RRC连接重配置消息中携带的内容包括但不限于:小区 1、小区 3、 小区 4 的频点信息(或频点索引)和 /或频点配置信息(如: 频点对 应的带宽); 小区 1、 小区 3、 小区 4的载波配置信息; 小区 1、 小区 3、 小区 4对应的 MAC层和 /或物理层实体的重配置信息; 服务小区 的指示信息; 小区 1、 小区 3、 4小区相关的系统信息; 此外, 还可 以包括不需要引发 PDCP或 RLC实体进行重建的重配置参数; 变化 后的聚合小区对应的成员载波标识;变化后的聚合小区对应的小区标 识。 需要说明的是变化后的聚合小区对应的小区标识, 可以为: 聚合 小区对应的物理层小区 ID; 和 /或, 聚合小区对应的小区全球 ID ( ECGI ); 和 /或, 聚合小区对应的小区 ID。
步骤 803, UE在接收到该 RRC连接重配置消息后, 将聚合小区 由小区 1、 小区 2、 小区 3, 变为小区 1、 小区 3、 小区 4; 对各小区 对应的 MAC层和 /或物理层实体进行配置或更新;并根据各小区相关 的系统信息进行相应配置。 此外, 如果 RRC连接重配置消息中包含 了 PDCP和 /或 RLC实体的配置参数时, 则需要根据指示对 PDCP和 /或 RLC相应参数进行配置。
步骤 804, UE利用基于小区 1的 {PCI, 下行载波频率 }计算得到 的 AS密钥向网络侧发送重配置完成消息。
需要说明的是, 本发明实施例中, 当不需要对小区 1、 小区 3的 相关实体(MAC层和 /或物理层实体)进行重配置时, 该 RRC连接 重配置消息中也可以不包含小区 1、 小区 3相关的实体重配置信息, 而只携带小区 2的 MAC层和 /或物理层实体重配置信息。 类似的, 当 不需要携带小区 1、 小区 3的系统信息和其它信息时, 该 RRC连接 重配置消息中也可以不携带小区 1、 小区 3的系统信息和其它信息, 在此不再赘述。 可见, 通过使用本发明提供的方法, 对于 LTE-A 系统, 当支持 载波聚合 UE的聚合小区在同一个可聚合小区集内发生变化时, 可以 对 UE的聚合小区进行重配置; 而且还可以使用相同的 AS密钥进行 数据的安全性处理过程, 从而避免了当 UE的聚合小区 (载波)在同 一个可聚合小区集内进行变化时,频繁切换所造成的数据传输中断以 及数据丢失等问题, 保证了数据的不间断传输。
如图 9所示,本发明实施例六提供一种进行聚合小区的重配置方 法, 本实施例中, 以 UE聚合小区在 UE已聚合小区内发生变化, 且 不启动切换过程为例进行说明。 其中, UE聚合小区在 UE已聚合小 区内发生变化包括但不限于: (1 ) UE变换月良务小区; (2 )删除或重 配某些聚合小区; ( 3 )服务小区改变的同时删除或重配某些聚合小区 等。 继续以图 5为例, 当前网络侧设备的可聚合小区集中的小区包括 小区 1、 小区 2、 小区 3、 小区 4、 和小区 5, 而当前 UE已聚合的载 波对应的小区为小区 1、 小区 2和小区 3且服务小区为 1。 当前所使 用的 AS密钥是基于小区 1的 {PCI, 下行载波频率 }进行计算的。 该 发生聚合小区的重配置方法包括以下步骤:
步骤 901 , 网络侧设备获知需要将 UE的聚合小区由 1、 2、 3, 变为 1、 3, 其中, 该服务小区保持不变。
步骤 902, 网络侧设备向 UE发送 RRC连接重配置消息。 其中, 该 RRC连接重配置消息中携带的内容包括但不限于: 小区 1、 小区 3 的频点信息(或频点索引)和 /或频点配置信息; 小区 1、 小区 3对应 的 MAC层和 /或物理层实体的重配置信息; 服务小区的指示信息; 小 区 1、 小区 3相关的系统信息; 还可以包括不需引发 PDCP或 RLC 实体进行重建的重配置参数; 变化后的聚合小区对应的成员载波标 识; 变化后的聚合小区对应的小区标识。 需要说明的是变化后的聚合 小区对应的小区标识, 可以为: 聚合小区对应的物理层小区 ID; 和 / 或, 聚合小区对应的小区全球 ID ( ECGI ); 和 /或, 聚合小区对应的 小区 ID。
步骤 903, UE在接收到该 RRC连接重配置消息后, 将聚合小区 由小区 1、 小区 2、 小区 3, 变为小区 1、 小区 3。
步骤 904, UE利用基于小区 1的 {PCI, 下行载波频率 }计算得 到的 AS密钥向网络侧发送重配置完成消息。
需要说明的是, 本发明实施例中, 当不需要对小区 1、 小区 3的 相关实体(MAC层和 /或物理层实体)进行重配置时, 该 RRC连接 重配置消息中也可以不包含小区 1、 小区 3相关的实体重配置信息。 类似的, 当不需要携带小区 1、 小区 3的系统信息和其它信息时, 该 RRC连接重配置消息中也可以不携带小区 1、小区 3的系统信息和其 它信息, 在此不再赘述。
可见, 通过使用本发明提供的方法, 对于 LTE-A 系统, 当支持 载波聚合 UE的聚合小区在同一个可聚合小区集内发生变化时, 可以 对 UE的聚合小区进行重配置; 而且还可以使用相同的 AS密钥进行 数据的安全性处理过程, 从而避免了当 UE的聚合小区 (载波)在同 一个可聚合小区集内进行变化时,频繁切换所造成的数据传输中断以 及数据丢失等问题, 保证了数据的不间断传输。
本发明实施例七提供一种网络侧设备, 如图 10所示, 包括: 判断模块 1001 ,用于判断是否需要对 UE的聚合小区在可聚合小 区集内进行变化; 其中, 所述 UE的聚合小区在可聚合小区集内进行 变化包括以下内容中的一种或几种: 所述 UE的主服务小区在可聚合 小区集内进行变化;所述 UE的服务小区在可聚合小区集内进行变化; 所述 UE的锚点成员小区在可聚合小区集内进行变化; 所述 UE的所 有或部分已聚合小区在可聚合小区集内进行变化。 进一步的, 所述 UE的所有或部分已聚合小区在可聚合小区集内发生变化包括以下内 容中的一种或几种: 在所述 UE已聚合小区的基础上添加新的小区; 在所述 UE已聚合小区的基础上删除小区; 改变所述 UE已聚合小区 中所包含的所有或部分小区的配置信息。
具体的, 所述判断模块 1001具体用于, 根据 UE的测量上报判 断是否需要对 UE的聚合小区在可聚合小区集内进行变化; 或, 根据 可聚合小区集内各小区的负荷判断是否需要对 UE的聚合小区在可聚 合小区集内进行变化; 或, 根据 UE的业务需求判断是否需要对 UE 的聚合小区在可聚合小区集内进行变化。
发送模块 1002, 用于当所述判断模块 1001的判断结果为需要对 UE的聚合小区在可聚合小区集内进行变化时, 向所述 UE发送 RRC 连接重配置消息, 所述 RRC连接重配置消息中携带所述 UE的聚合 小区的变化信息; 由所述 UE根据所述 RRC连接重配置消息对聚合 小区进行重配置。 其中, 所述 UE的聚合小区的变化信息包括以下内 容中的一种或几种:变化后的聚合小区对应的频点信息或频点信息索 引; 变化后的聚合小区对应的载波配置信息; 变化后的聚合小区对应 的频点配置信息; 变化后的聚合小区对应的系统信息; 变化后的聚合 小区对应的成员载波标识; 变化后的聚合小区对应的小区标识; 变化 后的服务小区和 /或主服务小区的标识信息。 进一步的, 所述变化后 的聚合小区对应的小区标识, 包括以下内容中的一种或几种: 聚合小 区对应的物理层小区 ID; 聚合小区对应的小区全球 ID; 聚合小区对 应的小区 ID。
其中, 所述发送模块 1002还用于, 将携带变化后的聚合小区对 应的 MAC层重配置信息和 /或物理层重配置信息的 RRC连接重配置 消息发送给所述 UE, 由所述 UE根据所述 RRC连接重配置消息中的 MAC层重配置信息和 /或物理层重配置信息, 重配置 MAC层实体和 / 或物理层实体。
所述发送模块 1002还用于,向所述 UE发送携带 UE的聚合小区 的变化信息但不携带移动性控制信息和安全性配置信息的 RRC连接 重配置消息; 由所述 UE采用接收所述 RRC连接重配置消息前所使 用的 AS密钥进行安全处理。
此外, 本发明所提供的网络侧设备中, 所述判断模块 1001还用 于判断所述 UE是否需要进行随机接入过程; 所述发送模块 1002还 用于, 向所述 UE发送携带随机接入指示信息的 RRC连接重配置消 息; 所述随机接入指示信息用于指示 UE是否进行随机接入过程。
进一步的, 所述发送模块 1002还用于, 在判断模块的判断结果 为是时,分配所述 UE用于随机接入时使用的 preamble,并将 preamle 的标识信息携带在所述 RRC连接重配置消息中发送给所述 UE。
其中,本发明装置的各个模块可以集成于一体,也可以分离部署。 上述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。
本发明实施例八提供一种用户设备 UE, 如图 11所示, 包括: 接收模块 1101 ,用于当网络侧设备判断需要对 UE的聚合小区在 可聚合小区集内进行变化时, 接收来自所述网络侧设备的 RRC连接 重配置消息; 所述 RRC连接重配置消息中携带所述 UE的聚合小区 的变化信息; 其中, UE的聚合小区在可聚合小区集内进行变化包括 以下内容中的一种或几种: 所述 UE的主服务小区在可聚合小区集内 发生变化; 所述 UE 的服务小区在可聚合小区集内发生变化; 所述 UE的锚点成员小区在可聚合小区集内发生变化; 所述 UE的所有或 部分已聚合小区在可聚合小区集内发生变化。 进一步的, 所述 UE的 所有或部分已聚合小区在可聚合小区集内发生变化包括以下内容中 的一种或几种: 在所述 UE已聚合小区的基础上添加新的小区; 在所 述 UE已聚合小区的基础上删除小区; 改变所述 UE已聚合小区中所 包含的所有或部分小区的配置信息。
此外, 所述 UE的聚合小区的变化信息包括以下内容中的一种或 几种: 变化后的聚合小区对应的频点信息或频点信息索引; 变化后的 聚合小区对应的载波配置信息;变化后的聚合小区对应的频点配置信 息; 变化后的聚合小区对应的系统信息; 变化后的聚合小区对应的成 员载波标识; 变化后的聚合小区对应的小区标识; 变化后的服务小区 和 /或主服务小区的标识信息。 进一步的, 所述变化后的聚合小区对 应的小区标识, 包括以下内容中的一种或几种: 聚合小区对应的物理 层小区 ID; 聚合小区对应的小区全球 ID; 聚合小区对应的小区 ID。
处理模块 1102,用于根据所述接收模块 1101接收的 RRC连接重 配置消息对聚合小区进行重配置。
所述 UE的聚合小区的变化信息还包括: 变化后的聚合小区对应 的 MAC层重配置信息和 /或物理层重配置信息; 而当所述 UE的聚合 小区的变化信息中携带所述变化后的聚合小区对应的 MAC层重配置 信息和 /或物理层重配置信息时, 所述处理模块 1102还用于, 根据所 述 RRC连接重配置消息中的 MAC层重配置信息和 /或物理层重配置 信息, 重配置 MAC层实体和 /或物理层实体。
当所述网络侧设备向所述 UE发送携带 UE的聚合小区的变化信 息但不携带移动性控制信息和安全性配置信息的 RRC连接重配置消 息时, 所述处理模块 1102还用于, 采用接收所述 RRC连接重配置消 息前所使用的 AS密钥进行安全处理, 并向所述网络侧设备发送重配 置完成消息, 以保证数据不间断传输。
所述处理模块 1102具体用于,采用接收所述 RRC连接重配置消 息前所使用的 AS密钥中的 KUPenc密钥的对数据进行加解密; 采用 接收所述 RRC连接重配置消息前所使用的 AS密钥中的 KRRCint密 钥的对 RRC信令的完整性进行保护和验证;采用接收所述 RRC连接 重配置消息前所使用的 AS密钥中的 KRRCenc密钥对 RRC信令进行 加解密。
具体的, 所述处理模块 1102具体用于执行以下内容中的一种或 几种:对新增加聚合小区对应的 MAC层实体和 /或物理层实体进行配 置;对从原聚合小区中删除的小区对应的 MAC层实体和 /或物理层实 体进行删除或重置; 对仍然使用的原聚合小区中的小区对应的 MAC 层实体和 /或物理层实体进行重配置。
判断模块 1103, 用于在所述处理模块 1102向所述网络侧设备发 送重配置完成消息之前, 判断是否启动随机接入过程; 并在判断结果 为是时, 启动随机接入; 在判断结果为否时, 省略随机接入。 此外, 所述判断模块 1103还用于根据所述 RRC连接重配置消息中是否携带 随机接入指示信息来判断是否启动随机接入过程。
其中,本发明装置的各个模块可以集成于一体,也可以分离部署。 上述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。
本发明实施例还提供一种聚合小区的重配置系统, 包括: 网络侧设备, 用于判断是否需要对 UE的聚合小区在可聚合小区 集内进行变化; 并在判断结果为发生变化时, 向所述 UE发送 RRC 连接重配置消息, 所述 RRC连接重配置消息中携带所述 UE的聚合 小区的变化信息; 其中, 所述 UE的聚合小区在可聚合小区集内进行 变化包括以下内容中的一种或几种: 所述 UE的主服务小区在可聚合 小区集内进行变化;所述 UE的服务小区在可聚合小区集内进行变化; 所述 UE的锚点成员小区在可聚合小区集内进行变化; 所述 UE的所 有或部分已聚合小区在可聚合小区集内进行变化。 进一步的, 所述 UE的所有或部分已聚合小区在可聚合小区集内发生变化包括以下内 容中的一种或几种: 在所述 UE已聚合小区的基础上添加新的小区; 在所述 UE已聚合小区的基础上删除小区; 改变所述 UE已聚合小区 中所包含的所有或部分小区的配置信息。
UE, 用于接收所述 RRC连接重配置消息, 并根据所述 RRC连 接重配置消息对聚合小区进行重配置。
可见, 通过采用本发明提供的设备和系统, 对于 LTE-A 系统, 当支持载波聚合 UE 的聚合小区在同一个可聚合小区集内发生变化 时, 可以对 UE的聚合小区进行重配置; 而且还可以使用相同的 AS 密钥进行数据的安全性处理过程, 从而避免了当 UE的小区 (载波) 在同一个可聚合小区集内进行变化时,频繁切换所造成的数据传输中 断以及数据丢失等问题, 保证了数据的不间断传输。
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计算机设备(可以是个人计算机, 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。
本领域技术人员可以理解附图只是一个优选实施例的示意图,附 图中的模块或流程并不一定是实施本发明所必须的。
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。
上述本发明实施例序号仅仅为了描述, 不代表实施例的优劣。 以上公开的仅为本发明的几个具体实施例, 但是, 本发明并非局 限于此,任何本领域的技术人员能思之的变化都应落入本发明的保护 范围。

Claims

权利要求
1、 一种聚合小区的重配置方法, 其特征在于, 包括:
网络侧设备判断是否需要对 UE的聚合小区在可聚合小区集内进 行变化;
当判断结果为需要进行变化时, 所述网络侧设备向所述 UE发送 RRC连接重配置消息, 所述 RRC连接重配置消息中携带所述 UE的 聚合小区的变化信息;
所述 UE接收所述 RRC连接重配置消息, 并根据所述 RRC连接 重配置消息对聚合小区进行重配置。
2、 如权利要求 1所述的方法, 其特征在于, 所述 UE的聚合小 区在可聚合小区集内进行变化包括以下内容中的一种或几种:
所述 UE的主服务小区在可聚合小区集内进行变化; 所述 UE的 服务小区在可聚合小区集内进行变化; 所述 UE的锚点成员小区在可 聚合小区集内进行变化; 所述 UE的所有或部分已聚合小区在可聚合 小区集内进行变化。
3、 如权利要求 2所述的方法, 其特征在于, 所述 UE的所有或 部分已聚合小区在可聚合小区集内发生变化包括以下内容中的一种 或几种:
在所述 UE已聚合小区的基础上添加新的小区; 在所述 UE已聚 合小区的基础上删除小区; 改变所述 UE已聚合小区中所包含的所有 或部分小区的配置信息。
4、 如权利要求 1或 2所述的方法, 其特征在于, 所述网络侧设 备判断是否需要对 UE的聚合小区在可聚合小区集内进行变化包括: 所述网络侧设备根据 UE的测量上报判断是否需要对 UE的聚合 小区在可聚合小区集内进行变化; 或,
所述网络侧设备根据可聚合小区集内各小区的负荷判断是否需 要对 UE的聚合小区在可聚合小区集内进行变化; 或,
所述网络侧设备根据 UE的业务需求判断是否需要对 UE的聚合 小区在可聚合小区集内进行变化。
5、 如权利要求 1所述的方法, 其特征在于, 所述 UE的聚合小 区的变化信息包括以下内容中的一种或几种:
变化后的聚合小区对应的频点信息或频点信息索引;变化后的聚 合小区对应的载波配置信息; 变化后的聚合小区对应的频点配置信 息; 变化后的聚合小区对应的系统信息; 变化后的聚合小区对应的成 员载波标识; 变化后的聚合小区对应的小区标识; 变化后的服务小区 和 /或主服务小区的标识信息。
6、 如权利要求 5所述的方法, 其特征在于, 所述变化后的聚合 小区对应的小区标识, 包括以下内容中的一种或几种:
聚合小区对应的物理层小区 ID; 聚合小区对应的小区全球 ID; 聚合小区对应的小区 ID。
7、 如权利要求 1所述的方法, 其特征在于, 所述 UE的聚合小 区的变化信息还包括:
变化后的聚合小区对应的 MAC层重配置信息和 /或物理层重配 置信息。
8、 如权利要求 7所述的方法, 其特征在于, 当所述 UE的聚合 小区的变化信息中携带所述变化后的聚合小区对应的 MAC层重配置 信息和 /或物理层重配置信息时,
所述网络侧设备向所述 UE发送 RRC连接重配置消息之后, 还 包括:
所述 UE根据所述 RRC连接重配置消息中的 MAC层重配置信息 和 /或物理层重配置信息, 重配置 MAC层实体和 /或物理层实体。
9、 如权利要求 1所述的方法, 其特征在于, 所述网络侧设备向 所述 UE发送 RRC连接重配置消息还包括:
所述网络侧设备向所述 UE发送携带 UE的聚合小区的变化信息 但不携带移动性控制信息和安全性配置信息的 RRC 连接重配置消
10、 如权利要求 9所述的方法, 其特征在于, 所述网络侧设备向 所述 UE发送携带 UE的聚合小区的变化信息但不携带移动性控制信 息和安全性配置信息的 RRC连接重配置消息之后, 还包括:
所述 UE采用接收所述 RRC连接重配置消息前所使用的 AS密钥 进行安全处理, 并向所述网络侧设备发送重配置完成消息, 以保证数 据不间断传输。
11、 如权利要求 10所述的方法, 其特征在于, 所述 UE采用接 收所述 RRC连接重配置消息前所使用的 AS密钥进行安全处理包括 以下内容中的一种或几种:
所述 UE采用接收所述 RRC连接重配置消息前所使用的 AS密钥 中的 KUPenc密钥的对数据进行加解密;
所述 UE采用接收所述 RRC连接重配置消息前所使用的 AS密钥 中的 KRRCint密钥的对 RRC信令的完整性进行保护和验证;
所述 UE采用接收所述 RRC连接重配置消息前所使用的 AS密钥 中的 KRRCenc密钥对 RRC信令进行加解密。
12、 如权利要求 1所述的方法, 其特征在于, 根据所述 RRC连 接重配置消息对聚合小区进行重配置之后, 还包括:
所述 UE判断是否进行随机接入过程; 并在判断结果为是时, 进 行随机接入过程; 在判断结果为否时, 省略随机接入过程。
13、 如权利要求 12所述的方法, 其特征在于, 所述网络侧设备 向所述 UE发送 RRC连接重配置消息之前, 还包括:
所述网络侧设备判断所述 UE是否需要进行随机接入过程, 并向 所述 UE发送携带随机接入指示信息的 RRC连接重配置消息; 所述 随机接入指示信息用于指示 UE是否进行随机接入过程。
14、 如权利要求 13所述的方法, 其特征在于, 所述网络侧设备 判断所述 UE是否需要进行随机接入过程之后, 还包括:
在判断结果为是时, 所述网络侧设备分配所述 UE用于随机接入 时使用的 preamble, 并将 preamle的标识信息携带在所述 RRC连接 重配置消息中发送给所述 UE。
15 、 如权利要求 13或 14所述的方法, 其特征在于, 所述 UE 判断是否进行随机接入过程, 还包括:
所述 UE根据所述 RRC连接重配置消息中是否携带随机接入指 示信息来判断是否启动随机接入过程。
16、 如权利要求 1所述的方法, 其特征在于, 根据所述 RRC连 接重配置消息对聚合小区进行重配置包括以下内容中的一种或几种: 所述 UE对新增加聚合小区对应的 MAC层实体和 /或物理层实体 进行配置;
所述 UE对从原聚合小区中删除的小区对应的 MAC层实体和 / 或物理层实体进行删除或重置;
所述 UE对仍然使用的原聚合小区中的小区对应的 MAC层实体 和 /或物理层实体进行重配置。
17、 一种网络侧设备, 其特征在于, 包括:
判断模块, 用于判断是否需要对 UE的聚合小区在可聚合小区集 内进行变 4匕;
发送模块, 用于当所述判断模块的判断结果为需要对 UE的聚合 小区在可聚合小区集内进行变化时, 向所述 UE发送 RRC连接重配 置消息, 所述 RRC连接重配置消息中携带所述 UE的聚合小区的变 化信息; 由所述 UE根据所述 RRC连接重配置消息对聚合小区进行 重配置。
18、 如权利要求 17所述的网络侧设备, 其特征在于,
所述判断模块具体用于, 根据 UE 的测量上报判断是否需要对 UE的聚合小区在可聚合小区集内进行变化; 或,
根据可聚合小区集内各小区的负荷判断是否需要对 UE的聚合小 区在可聚合小区集内进行变化; 或,
根据 UE的业务需求判断是否需要对 UE的聚合小区在可聚合小 区集内进行变化。
19、 如权利要求 17所述的网络侧设备, 其特征在于,
所述发送模块还用于, 将携带变化后的聚合小区对应的 MAC层 重配置信息和 /或物理层重配置信息的 RRC连接重配置消息发送给所 述 UE, 由所述 UE根据所述 RRC连接重配置消息中的 MAC层重配 置信息和 /或物理层重配置信息, 重配置 MAC层实体和 /或物理层实 体。
20、 如权利要求 17所述的网络侧设备, 其特征在于,
所述发送模块还用于, 向所述 UE发送携带 UE的聚合小区的变 化信息但不携带移动性控制信息和安全性配置信息的 RRC连接重配 置消息; 由所述 UE采用接收所述 RRC连接重配置消息前所使用的 AS密钥进行安全处理。
21、 如权利要求 17所述的网络侧设备, 其特征在于,
所述判断模块还用于,判断所述 UE是否需要进行随机接入过程; 所述发送模块还用于, 向所述 UE发送携带随机接入指示信息的
RRC连接重配置消息;所述随机接入指示信息用于指示 UE是否进行 随机接入过程。
22、 如权利要求 21所述的网络侧设备, 其特征在于,
所述发送模块还用于, 在判断模块的判断结果为是时, 分配所述 UE用于随机接入时使用的 preamble, 并将 preamle的标识信息携带 在所述 RRC连接重配置消息中发送给所述 UE。
23、 一种用户设备 UE, 其特征在于, 包括:
接收模块, 用于当网络侧设备判断需要对 UE的聚合小区在可聚 合小区集内进行变化时, 接收来自所述网络侧设备的 RRC连接重配 置消息; 所述 RRC连接重配置消息中携带所述 UE的聚合小区的变 化信息;
处理模块, 用于根据所述接收模块接收的 RRC连接重配置消息 对聚合小区进行重配置。
24、 如权利要求 23所述的 UE, 其特征在于, 所述 UE的聚合小 区的变化信息包括: 变化后的聚合小区对应的 MAC层重配置信息和 /或物理层重配置信息; 当所述 UE的聚合小区的变化信息中携带所述变化后的聚合小区 对应的 MAC层重配置信息和 /或物理层重配置信息时,
所述处理模块还用于,根据所述 RRC连接重配置消息中的 MAC 层重配置信息和 /或物理层重配置信息, 重配置 MAC层实体和 /或物 理层实体。
25、 如权利要求 23所述的 UE, 其特征在于, 当所述网络侧设备 向所述 UE发送携带 UE的聚合小区的变化信息但不携带移动性控制 信息和安全性配置信息的 RRC连接重配置消息时,
所述处理模块还用于, 采用接收所述 RRC连接重配置消息前所 使用的 AS密钥进行安全处理, 并向所述网络侧设备发送重配置完成 消息, 以保证数据不间断传输;
并具体用于,采用接收所述 RRC连接重配置消息前所使用的 AS 密钥中的 KUPenc密钥的对数据进行加解密;
采用接收所述 RRC 连接重配置消息前所使用的 AS 密钥中的 KRRCint密钥的对 RRC信令的完整性进行保护和险证;
采用接收所述 RRC 连接重配置消息前所使用的 AS 密钥中的 KRRCenc密钥对 RRC信令进行加解密。
26、 如权利要 23所述的 UE, 其特征在于, 还包括:
判断模块, 用于判断是否启动随机接入过程; 并在判断结果为是 时, 启动随机接入; 在判断结果为否时, 省略随机接入。
并根据所述 RRC连接重配置消息中是否携带随机接入指示信息 来判断是否启动随机接入过程。
27、 如权利要 23所述的 UE, 其特征在于,
所述处理模块具体用于执行以下内容中的一种或几种: 对新增加聚合小区对应的 MAC层实体和 /或物理层实体进行配 置;
对从原聚合小区中删除的小区对应的 MAC层实体和 /或物理层 实体进行删除或重置;
对仍然使用的原聚合小区中的小区对应的 MAC层实体和 /或物 理层实体进行重配置。
28、 一种聚合小区的重配置系统, 其特征在于, 包括: 网络侧设备, 用于判断是否需要对 UE的聚合小区在可聚合小区 集内进行变化; 并在判断结果为发生变化时, 向所述 UE发送 RRC 连接重配置消息, 所述 RRC连接重配置消息中携带所述 UE的聚合 小区的变化信息;
UE, 用于接收所述 RRC连接重配置消息, 并根据所述 RRC连 接重配置消息对聚合小区进行重配置。
PCT/CN2010/076948 2009-09-18 2010-09-15 一种聚合小区的重配置方法、设备和系统 Ceased WO2011032497A1 (zh)

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