WO2014040259A1 - 一种rrc连接重建方法、设备和网络系统 - Google Patents

一种rrc连接重建方法、设备和网络系统 Download PDF

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Publication number
WO2014040259A1
WO2014040259A1 PCT/CN2012/081349 CN2012081349W WO2014040259A1 WO 2014040259 A1 WO2014040259 A1 WO 2014040259A1 CN 2012081349 W CN2012081349 W CN 2012081349W WO 2014040259 A1 WO2014040259 A1 WO 2014040259A1
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WO
WIPO (PCT)
Prior art keywords
base station
message
terminal
primary
secondary base
Prior art date
Application number
PCT/CN2012/081349
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English (en)
French (fr)
Inventor
张宏平
曾清海
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to CN201280011751.2A priority Critical patent/CN103858485A/zh
Priority to PCT/CN2012/081349 priority patent/WO2014040259A1/zh
Publication of WO2014040259A1 publication Critical patent/WO2014040259A1/zh

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Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/18—Management of setup rejection or failure

Definitions

  • the present invention relates to the field of mobile communications, and in particular, to a radio resource control protocol RRC connection re-establishment method, device, and network system.
  • LTE-A Long Term Evolution-Advanced
  • Carrier Aggregation means that User Equipment (UE) can use multiple Component Carriers (CCs) for uplink and downlink communication at the same time.
  • UE User Equipment
  • CCs Component Carriers
  • the UE communicates with the network on multiple cells at the same time. Each cell uses one. Different carriers) to support high speed data transmission.
  • base stations one of them is a primary cell (primary base station), and the other is a secondary cell (secondary base station).
  • the carrier aggregation of the LTE system can be divided into intra-base station cell aggregation and inter-base station cell aggregation.
  • the cell aggregation in the base station means that the serving cells (secondary base stations) aggregated by the UE belong to the same primary base station. Since it is controlled by only one primary base station, it is relatively simple.
  • the Release-10 version of 3GPP supports aggregation between cells within a base station.
  • inter-base-station cell aggregation may be introduced. In this case, the aggregated cells may belong to different base stations, thereby providing a better user experience for the user.
  • the data and signaling need to be encrypted, and the key is not transmitted in the air interface, but the UE and the base station respectively derive the same key according to the same parameters.
  • the re-establishment process is initiated.
  • the UE In order to verify the UE, the UE carries a 16-bit short MAC-I (short integrity message authentication code) value in the re-establishment request message.
  • the short MAC-I is generated by using the key before re-establishment.
  • the purpose is to verify the UE and avoid malicious attacks by sending re-establishment.
  • the re-establishment process updates to generate a new key.
  • the UE selects a cell to initiate re-establishment, and only the base station of the cell has the context of the UE to be re-established successfully.
  • the inventors have found that at least the following problems exist in the prior art: for cell aggregation between base stations, when the primary base station fails to generate a radio link, the secondary base station may initiate a heavy Establish a problem that cannot be successful, which will affect the success rate of re-establishment and affect the user experience. Summary of the invention
  • Embodiments of the present invention provide a radio resource control protocol RRC connection re-establishment method, device, and network system, which can improve a radio link re-establishment success rate between a terminal and a base station.
  • the embodiment of the present invention adopts the following technical solutions:
  • an RRC connection reestablishment method including:
  • the first message is used to add a secondary base station to the terminal and carry the reconstruction preparation information
  • the reconstruction preparation information includes the following one or any combination of any items: a primary cell identifier corresponding to the primary base station ID, a temporary identifier of the radio network on the primary cell, a key corresponding to one or more cells of the secondary base station, and a short integrity message authentication code and bearer information;
  • the reconstruction preparation information is saved and a first message response message is returned to the primary base station.
  • the method further includes: receiving and saving the second message sent by the primary base station, where the second message is used to update the reconstruction preparation information.
  • the method further includes: receiving an RRC connection reestablishment request message sent by the terminal;
  • the terminal After the authentication is passed, the terminal is selected to initiate the RRC connection reestablishment request message.
  • a key corresponding to the corresponding cell identifier ID under the base station is used as a key for communication with the terminal.
  • the method further includes: sending, to the primary base station, a third message, where the third message is used to request the primary base station to forward data;
  • the third message response message includes: carrying an uplink and downlink PDCP sequence number and a super frame number HFN state Information
  • an RRC connection reestablishment method including: receiving an RRC connection reestablishment request message sent by a terminal; sending a third message to the primary eNodeB, where the third message is used to request the primary base station to forward data;
  • the third message response message includes: carrying an uplink and downlink PDCP sequence number and a super frame number HFN state Information
  • the third aspect provides an RRC connection re-establishment method, including: sending a first message to a secondary base station, where the first message is used to add a secondary base station to the terminal and carry the reconstruction preparation information, where the reconstruction preparation information includes the following item or Combination of any item: a primary cell identifier ID corresponding to the primary base station, a temporary identifier of the wireless network of the terminal on the primary cell, a key corresponding to one or more cells of the secondary base station, and a short integrity message authentication code, and a bearer Information
  • the method further includes: sending, to the secondary base station, a second message, where the second message is used to update the reconfiguration preparation Information.
  • a secondary base station including:
  • the first request receiving unit is configured to receive a first message sent by the primary base station, where the first message is used to add a secondary base station to the terminal and carry the reconstruction preparation information, where the reconstruction preparation information includes the following one or any combination of any items: a primary cell identifier ID corresponding to the primary base station, a temporary identifier of the wireless network of the terminal on the primary cell, a key corresponding to one or more cells of the secondary base station, and a short integrity message authentication code and bearer information; And a sending unit, configured to save the reconstruction preparation information and return a first message response message to the primary base station.
  • the secondary base station further includes: an update message receiving unit, configured to receive and save the second message sent by the primary base station, where the second message is used for updating The reconstruction preparation letter.
  • the secondary base station further includes: a first message sending unit, configured to receive an RRC connection reestablishment request message sent by the terminal;
  • a first message processing unit configured to authenticate the terminal according to the RRC connection reestablishment request message and a cell identifier ID of the terminal initiating the RRC connection reestablishment request message;
  • a first authentication management unit configured to: after the authentication is passed, select a key corresponding to the cell identifier ID corresponding to the secondary base station of the RRC connection reestablishment request message The key of the terminal communication.
  • the secondary base station further includes: a first request sending unit, configured to send a third message to the primary base station, where the third message is used by Requesting the primary base station to forward data;
  • a first response receiving unit configured to receive a third message response message sent by the primary base station, and save a packet data convergence protocol PDCP data packet that is forwarded by the primary base station, where the third message response message includes: carrying uplink and downlink PDCP sequence number and superframe number HFN status information;
  • a secondary base station including:
  • a second message sending unit configured to receive an RRC connection reestablishment request message sent by the terminal, where the second request sending unit is configured to send a third message to the primary base station, where the third message is used to request the primary base station to forward data;
  • a second response receiving unit configured to receive a third message response message sent by the primary base station, and save a packet data convergence protocol PDCP data packet that is forwarded by the primary base station, where the third message response message includes: carrying uplink and downlink And a second response sending unit, configured to send an RRC connection reestablishment message to the terminal, where the RRC connection reestablishment message is used to respond to the RRC connection reestablishment request message.
  • a primary base station including:
  • the third request sending unit is configured to send the first message to the secondary base station, where the first message is used to add the secondary base station to the terminal and carry the reconstruction preparation information, where the reconstruction preparation information includes the following one or a combination of any items: a primary cell identifier ID corresponding to the base station, a temporary identifier of the wireless network of the terminal on the primary cell, a key corresponding to one or more cells of the secondary base station, a short integrity message authentication code, and bearer information;
  • a third response receiving unit configured to receive a first message response message sent by the secondary base station.
  • the primary base station further includes: And an update message sending unit, configured to send a second message to the secondary base station, where the second message is used to update the reconstruction preparation letter.
  • the primary base station further includes:
  • a third request receiving unit configured to receive a third message sent by the secondary base station, where the third message is used to request the primary base station to forward data
  • a third response sending unit configured to send a third message response message and a packet data convergence protocol (PDCP) data packet to the secondary base station according to the third message, where the third message response message includes: carrying an uplink and downlink PDCP sequence number and Super frame number HFN status information.
  • PDCP packet data convergence protocol
  • a secondary base station including a first memory and a first processor connected to the first memory through a data bus, and at least one connected to the first memory and the first processor respectively The first ingress segment and the at least one first egress end; the first processor is configured to receive, by using the at least one first ingress end, a first message sent by the primary eNodeB, where the first message is used to add a secondary base station to the terminal And carrying the reconstruction preparation information, where the reconstruction preparation information includes the following one or a combination of any items: a primary cell identifier ID corresponding to the primary base station, a temporary identifier of the wireless network of the terminal on the primary cell, and a secondary or multiple secondary base station The key corresponding to the cell and the short integrity message authentication code and bearer information;
  • the first memory is configured to save the reconstruction preparation information and return a first message response message to the primary base station through the at least one first egress end.
  • the first processor is further configured to receive, by using the at least one first ingress end, a second message sent by the primary base station and pass the first memory. The second message is used to update the reconstruction preparation information.
  • the first processor is further configured to receive, by using the at least one first ingress end, an RRC connection reestablishment sent by the terminal a request message; authenticating the terminal in the first memory according to the RRC connection reestablishment request message and a cell identifier ID of the terminal initiating the RRC connection reestablishment request message; the first processor further After the authentication is passed, the key corresponding to the cell identifier ID corresponding to the secondary base station that initiates the RRC connection reestablishment request message is selected as the The key of the terminal communication.
  • the first processor is specifically configured to send, by using the at least one first egress end, a third message to the primary eNodeB, where The third message is used to request the primary base station to forward data; the third message response message sent by the primary base station is received by the at least one first ingress end, and the packet data convergence protocol forwarded by the primary base station is saved by using the first memory.
  • the third message response message includes: carrying an uplink and downlink PDCP sequence number and a super frame number HFN state information; and sending, by the at least one second egress end, an RRC connection reestablishment message to the terminal, where the RRC connection is The reconstruct message is used to respond to the RRC Connection Reestablishment Request message.
  • a secondary base station including a second memory and a second processor connected to the second memory through a data bus, and at least one connected to the second memory and the second processor respectively a second ingress terminal and at least one second egress end, where: the second processor is configured to receive, by using the at least one second ingress end, an RRC connection reestablishment request message sent by the terminal;
  • the second processor is further configured to send, by using the at least one second egress, a third message to the primary eNodeB, where the third message is used to request the primary eNodeB to forward data, and the at least one second entry is
  • the terminal receives the third message response message sent by the primary base station, and saves the packet data convergence protocol PDCP data packet forwarded by the primary base station by using the second memory, where the third message response message includes: carrying the uplink and downlink PDCP Sequence number and superframe number HFN status information; transmitting, by the at least one second egress end, an RRC connection reestablishment message to the terminal, the RRC connection reestablishment message being used to respond to the RRC connection reestablishment request message.
  • a primary base station including a third memory and a third processor connected to the third memory through a data bus, and at least one connected to the third memory and the third processor respectively a third inlet end and at least one third outlet end,
  • the third processor is configured to send a first message to the secondary base station by using the at least one third egress, where the first message is used to add a secondary base station to the terminal and carry the reconfiguration preparation information, where the reconfiguration preparation information includes the following Combination of items or any items: a primary cell identifier ID corresponding to the primary base station, a temporary identifier of the wireless network of the terminal on the primary cell, a key corresponding to one or more cells of the secondary base station, and a short integrity message authentication code And carrying, by the at least one third ingress end, the first message response message sent by the secondary base station.
  • the third processor is further configured to send, by using the at least one third egress end, a second message to the secondary eNodeB, where the second message is used The reconstruction preparation information is updated.
  • the third processor is further configured to receive, by using the at least one third ingress end, the third sent by the secondary base station a message, the third message is used to request the primary base station to forward data, and the third message response message and the packet in the third memory are sent to the secondary base station by using the at least one third egress end according to the third message.
  • the tenth aspect provides a network system, including: a primary base station, a secondary base station, and a terminal, where the primary base station is the primary base station, and the secondary base station is the secondary base station according to the fourth aspect and the fifth aspect. ;
  • the primary base station is the primary base station according to the ninth aspect
  • the secondary base station is the secondary base station according to the seventh aspect and the eighth aspect.
  • the terminal in combination with the tenth aspect, is configured to initiate an RRC connection reestablishment request message to a frequency band in which the serving cell is located or a secondary base station corresponding to the serving cell.
  • the RRC connection re-establishment method, device, and network system provided by the embodiment of the present invention can implement the RRC connection reestablishment between the re-establishment preparation information and the secondary base station according to the reconfiguration preparation information acquired by the secondary base station, and solve the problem that when the primary base station fails to generate a radio link, the secondary base station is implemented.
  • the problem of wireless link re-establishment improves the success rate of connection reconstruction between the terminal and the base station.
  • FIG. 3 is a schematic flowchart of an RRC connection reestablishment method according to another embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of another RRC connection reestablishment method according to another embodiment of the present invention.
  • FIG. 5 is a schematic structural diagram of a secondary base station according to an embodiment of the present invention
  • FIG. 6 is a schematic structural diagram of another secondary base station according to an embodiment of the present invention
  • FIG. 7 is a schematic structural diagram of a secondary base station according to another embodiment of the present invention
  • FIG. 8 is a schematic structural diagram of a primary base station according to an embodiment of the present invention
  • FIG. 9 is a schematic structural diagram of another primary base station according to an embodiment of the present invention.
  • FIG. 10 is a schematic structural diagram of another secondary base station according to another embodiment of the present invention.
  • FIG. 12 is a schematic structural diagram of a primary base station according to another embodiment of the present invention.
  • FIG. 13 is a schematic structural diagram of a network system according to an embodiment of the present invention.
  • An embodiment of the present invention provides an RRC connection re-establishment method. On the secondary base station side, as shown in FIG. 1, the following steps are included:
  • the secondary base station receives a first message sent by the primary base station, where the first message is used to add a secondary base station to the terminal.
  • the first message carries the reconstruction preparation information, and the reconstruction preparation information includes: the following one or a combination of any items: a primary cell identifier ID corresponding to the primary base station, a temporary identifier of the wireless network of the terminal on the primary cell, or a secondary base station next or Key and short integrity message corresponding to multiple cells Authentication code, bearer information.
  • RRC radio resource control
  • the ID, the primary base station wireless network temporary identifier to identify the terminal, and the terminal is authenticated by the identifier ID and the short integrity message authentication code of the reconstructed cell under the secondary base station.
  • the cell corresponding to the reconstructed cell under the secondary base station is used.
  • the key encrypts and integrity protects the transmitted data, and carries the recovery of the bearer by carrying the information.
  • the key corresponding to one or more cells of the secondary base station and the short integrity message authentication code specifically refer to a key and a short integrity message authentication code that are derived by using the ID of the cell as a parameter.
  • the secondary base station saves the reconstruction preparation information and returns a first message response message to the primary base station.
  • the method further includes: the secondary base station receiving and saving the second message sent by the primary base station, where the second message is used to update the reconfiguration preparation information, and the updated reconfiguration preparation information includes Combination of one or any of the following: a primary cell identifier ID corresponding to the primary base station, a temporary identifier of the wireless network of the terminal on the primary cell, a key corresponding to the next one or more cells of the updated secondary base station, and a short integrity message
  • the weight code list and the updated bearer information are used to ensure the success probability of the terminal initiating the connection re-establishment process.
  • the secondary base station is a base station within the control range of the primary base station, and the cell corresponding to the secondary base station is a cell in the primary base station.
  • the reconstruction preparation information may change when the bearer and the key change after adding the cell under the secondary base station, for example, when the mobile control entity requests the base station to increase the bearer or the terminal switches, the corresponding key on the primary base station is re-derived. The reconstruction preparation information is updated.
  • the RRC connection re-establishment method provided by the embodiment of the present invention can implement the RRC connection reestablishment by the terminal and the secondary base station according to the reconfiguration preparation information acquired by the secondary base station at the primary base station, and solve the problem that when the primary base station fails the radio link, the secondary base station radio chain
  • the problem of road weight establishment improves the success rate of connection reconstruction between the terminal and the base station.
  • An embodiment of the present invention provides an RRC connection reestablishment method. On the primary base station side, as shown in FIG. 2, the following steps are included:
  • the primary base station sends a first message to the secondary base station, where the first message is used to add a secondary base station to the terminal.
  • the first message carries the reconstruction preparation information, and the reconstruction preparation information includes the following one or a combination of any items: a primary cell identifier corresponding to the primary base station, and a wireless terminal on the primary cell.
  • RRC radio resource control
  • the ID, the primary base station wireless network temporary identifier to identify the terminal, and the terminal is authenticated by the identifier ID and the short integrity message authentication code of the reconstructed cell under the secondary base station.
  • the cell corresponding to the reconstructed cell under the secondary base station is used.
  • the key encrypts and integrity protects the transmitted data, and carries the recovery of the bearer by carrying the information.
  • the key corresponding to one or more cells of the secondary base station and the short integrity message authentication code specifically refer to a key and a short integrity message authentication code that are derived by using the ID of the cell as a parameter.
  • the primary base station receives a first message response message sent by the secondary base station.
  • the method further includes: the primary base station sending a second message to the secondary eNodeB, where the second message is used to update the reconfiguration preparation information,
  • the updated reconstruction preparation information includes the following one or a combination of any items: a primary cell identifier ID corresponding to the primary base station, a wireless network temporary identifier of the terminal on the primary cell, and an updated secondary base station corresponding to one or more cells. Key and short integrity message authentication code, updated bearer information. Therefore, the success probability of the connection re-establishment process is initiated by the terminal.
  • the connection re-establishment process may be a connection re-establishment process of Radio Resource Control (RRC).
  • RRC Radio Resource Control
  • the reconstruction preparation information may change when the bearer and the key change after adding the cell under the secondary base station, for example, when the mobile control entity requests the base station to increase the bearer or the terminal switches, the corresponding key on the primary base station is re-derived.
  • the reconstruction preparation information is updated.
  • the RRC connection re-establishment method provided by the embodiment of the present invention can implement the RRC connection reestablishment by the terminal and the secondary base station according to the reconfiguration preparation information acquired by the secondary base station at the primary base station, and solve the problem that when the primary base station fails the radio link, the secondary base station radio chain
  • the problem of road weight establishment improves the success rate of connection reconstruction between the terminal and the base station.
  • the RRC connection re-establishment method is provided in the embodiment of the present invention.
  • FIG. 3 only the keyword pool in each step is shown.
  • the description including:
  • the primary base station sends a first message to the secondary base station, where the first message is used to add to the terminal.
  • Secondary base station sends a first message to the secondary base station, where the first message is used to add to the terminal.
  • the secondary base station receives the first message sent by the primary base station.
  • the first message carries the reconfiguration preparation information
  • the reconfiguration preparation information includes the following one or a combination of any items: a primary cell identifier ID corresponding to the primary base station, a temporary identifier of the wireless network of the terminal on the primary cell, and a secondary or multiple secondary base station
  • RRC radio resource control
  • the ID, the primary base station wireless network temporary identifier to identify the terminal, and the terminal is authenticated by the identifier ID and the short integrity message authentication code of the reconstructed cell under the secondary base station.
  • the cell corresponding to the reconstructed cell under the secondary base station is used.
  • the key encrypts and integrity protects the transmitted data, and carries the recovery of the bearer by carrying the information.
  • the key corresponding to one or more cells of the secondary base station and the short integrity message authentication code specifically refer to a key and a short integrity message authentication code that are derived by using the ID of the cell as a parameter.
  • the secondary base station saves the reconstruction preparation information and returns a first message response message to the primary base station.
  • the primary base station receives the first message response message sent by the secondary base station.
  • the reconfiguration preparation information may change when the bearer and the key change after the cell under the secondary base station is added, for example, when the mobile control entity requests the base station to increase the bearer or the terminal has a corresponding key when the handover occurs.
  • the key generation is derivatized to update the reconstruction preparation information, and the method further includes:
  • the primary base station sends a second message to the secondary base station, where the second message is used to update the reconstruction preparation information.
  • the updated reconstruction preparation information includes one or a combination of any one of the following: a primary cell identifier ID corresponding to the primary base station, a temporary identifier of the wireless network of the terminal on the primary cell, and a secret corresponding to one or more cells of the updated secondary base station. Key and short integrity message authentication code, updated bearer information. In this way, the probability of success of the connection re-establishment process is ensured by the real-time update reconstruction preparation information.
  • the secondary base station receives the second message sent by the primary base station and saves the second message.
  • the RRC connection reestablishment method provided by the embodiment of the present invention solves when the primary base station occurs When the radio link fails, the re-establishment initiated by the secondary and secondary base stations may not be successful, and the success rate of re-establishment between the secondary base stations is improved.
  • the method provided by the embodiment of the present invention further includes the following steps:
  • the secondary base station receives an RRC connection reestablishment request message sent by the terminal.
  • the terminal may send an RRC connection reestablishment request message to the frequency band in which the serving cell is located or the secondary base station corresponding to the serving cell.
  • the secondary base station authenticates the terminal according to the RRC connection reestablishment request message and the cell identifier ID of the RRC connection reestablishment request message initiated by the terminal.
  • the authentication code corresponding to the re-established access cell identifier ID of the terminal saved in the secondary base station is the same as the authentication code in the re-establishment request, the authentication is passed, otherwise, the cell is saved.
  • the authentication code corresponding to the identifier ID may be sent to the secondary base station by using a message (such as the reconstruction preparation information), or may be reserved in the previous communication relationship between the primary base station and the secondary base station.
  • the secondary base station sends a third message to the primary base station, where the third message is used to request the primary base station to forward data.
  • the primary base station receives the third message sent by the secondary base station.
  • the primary base station sends a third message response message and a packet data convergence protocol PDCP data packet to the secondary base station according to the third message, where the third message response message includes: carrying the uplink and downlink PDCP sequence number and the super frame number HFN state information.
  • the secondary base station receives the third message response message sent by the primary base station, and saves the packet data convergence protocol PDCP data packet forwarded by the primary base station.
  • the uplink and downlink PDCP sequence number and the superframe number HFN state information are used to notify the secondary base station of the current terminal of the air interface data transmission and reception information, which is used to indicate which data packets are received, and which data packets have not been received, so that the secondary base station can determine the subsequent data transmission and reception. Then, the primary base station forwards the data to the secondary base station, so that the data can be sent to the terminal through the secondary base station to avoid loss of user data. 314.
  • the secondary base station sends an RRC connection reestablishment message to the terminal, where the RRC connection reestablishment message is used to respond to the RRC connection reestablishment request message.
  • the steps 310-313 may also occur after the step 314, that is, after the step 314, the terminal sends an RRC connection reestablishment complete message to the secondary base station, and after the secondary base station receives the RRC connection reestablishment complete message, the triggering step 310- 313.
  • the secondary base station notifies the primary base station that the re-establishment process occurs, and requests data forwarding, and the primary base station forwards the data to the secondary base station, thereby avoiding the loss of user data caused by the re-establishment process between the base stations.
  • the terminal performs a cell selection process to find a suitable cell camping before the terminal initiates the re-establishment process (the suitable cell refers to the signal strength exceeding the preset).
  • the terminal preferably searches for the frequency band in which the serving cell is located or the serving base station (the primary base station and the secondary base station), so that the terminal can initiate the re-establishment process under the base station with the terminal context as much as possible, and improve the re-establishment. The success rate of the process.
  • the RRC connection re-establishment method provided by the embodiment of the present invention can implement the RRC connection reestablishment by the terminal and the secondary base station according to the reconfiguration preparation information acquired by the secondary base station at the primary base station, and solve the problem that when the primary base station fails the radio link, the secondary base station radio chain
  • the problem of road weight establishment improves the success rate of connection reconstruction between the terminal and the base station; in addition, data loss of the terminal used by the user can be avoided.
  • An embodiment of the present invention provides an RRC connection re-establishment method. Referring to FIG. 4, the method includes the following steps:
  • the secondary base station receives an RRC connection reestablishment request message sent by the terminal.
  • the secondary base station sends a third message to the primary base station, where the third message is used to request the primary base station to forward data.
  • the primary base station receives the third message sent by the secondary base station.
  • the primary base station sends a third message response message and a packet data convergence protocol PDCP data packet to the secondary base station according to the third message, where the third message response message includes: carrying the uplink and downlink PDCP sequence number and the super frame number HFN state information.
  • the secondary base station receives the third message response message sent by the primary base station, and saves the primary base station.
  • the uplink and downlink PDCP sequence number and the superframe number HFN state information are used to notify the secondary base station of the current terminal of the air interface data transmission and reception information, which is used to indicate which data packets are received, and which data packets have not been received, so that the secondary base station can determine the subsequent data transmission and reception.
  • the primary base station forwards the data to the secondary base station, so that the data can be sent to the terminal through the secondary base station to avoid loss of user data.
  • the secondary base station sends an RRC connection reestablishment message to the terminal, where the RRC connection reestablishment message is used to respond to the RRC connection reestablishment request message. It is to be noted that the steps 402-405 may also occur after the step 406, that is, after the step 406, the terminal sends an RRC connection reestablishment complete message to the secondary base station, and after the secondary base station receives the RRC connection reestablishment complete message, the step 402- 405.
  • the secondary base station notifies the primary base station that the re-establishment process occurs, and requests data forwarding, and the primary base station forwards the data to the secondary base station, thereby avoiding the loss of user data caused by the re-establishment process between the base stations.
  • the terminal performs a cell selection process to find a suitable cell camp before the terminal initiates the re-establishment process.
  • the terminal preferably searches for the frequency band or the serving base station (the primary base station and the secondary base station) where the serving cell is located, so that the terminal can initiate the re-establishment process under the base station with the terminal context as much as possible, thereby improving Re-establish the success rate of the process.
  • the RRC connection re-establishment method provided by the embodiment of the present invention can implement the RRC connection reestablishment by the terminal according to the reconfiguration preparation information acquired by the secondary base station and the secondary base station, and solves the problem that the secondary base station re-establishes the radio link when the primary base station fails the radio link.
  • the problem is that the success rate of connection reconstruction between the terminal and the base station is improved; in addition, the loss of data of the terminal used by the user can be avoided.
  • the embodiment of the present invention provides a secondary base station 5, as shown in FIG. 5, including a first request receiving unit 51 and a first response sending unit 52, where: the first request receiving unit 51 is configured to receive the first sending by the primary base station. a message, the first message is used to add a secondary base station to the terminal and carry the reconstruction preparation information, where the reconstruction preparation information includes the following one or a combination of any items: a primary cell identifier ID corresponding to the primary base station, and the terminal is in the primary cell The temporary identifier of the wireless network, the key corresponding to one or more cells of the secondary base station, the short integrity message authentication code, and the bearer information.
  • the first response sending unit 52 is configured to save the reconstruction preparation information and return the first message response message to the primary base station.
  • the secondary base station provided by the embodiment of the present invention can implement the RRC connection reestablishment between the secondary base station and the secondary base station according to the reconstruction preparation information acquired by the secondary base station at the primary base station, and solves the problem that when the primary base station fails the wireless link, the secondary base station wireless link is heavy. The established problem improves the success rate of connection reconstruction between the terminal and the base station. Further, optionally, referring to FIG. 5, the secondary base station 5 further includes:
  • the update message receiving unit 53 is configured to receive and save the second message sent by the primary base station, where the second message is used to update the reconstruction preparation information, and the updated reconstruction preparation information includes a combination of one or any one of the following: Corresponding primary cell identifier ID, a radio network temporary identifier of the terminal on the primary cell, a key corresponding to one or more cells under the updated secondary base station, a short integrity message authentication code, and updated bearer information.
  • the secondary base station 5 further includes:
  • the first message sending unit 54 is configured to receive an RRC connection reestablishment request message sent by the terminal.
  • the first authentication unit 55 is configured to start, according to the RRC connection, a request message, and the terminal initiates
  • the primary cell identifier ID of the RRC connection reestablishment request message is used to authenticate the terminal;
  • the first authentication management unit 56 is configured to: after the authentication is passed, select a key corresponding to the cell identifier ID corresponding to the secondary base station of the RRC connection reestablishment request message by the terminal as the key for communicating with the terminal.
  • the secondary base station 5 further includes:
  • the first request sending unit 57 is configured to send a third message to the primary base station, where the third message is used to request the primary base station to forward data.
  • the first response receiving unit 58 is configured to receive a third message response message sent by the primary base station and The packet data convergence protocol PDCP data packet forwarded by the primary base station is saved, where the third message response message includes: carrying the uplink and downlink PDCP sequence number and the super frame number HFN state information.
  • the first response sending unit 52 is further configured to send an RRC connection reestablishment message to the terminal, where the RRC connection reestablishment message is used to respond to the RRC connection reestablishment request message.
  • the uplink and downlink PDCP sequence number and the superframe number HFN state information are used to notify the air traffic data of the current terminal of the secondary base station, which is used to indicate which data packets are received, and which data packets have not been received, so that the secondary base station can determine the subsequent data. Send and receive. Then, the primary base station forwards the data to the secondary base station, so that the data can be sent to the terminal through the secondary base station to avoid loss of user data.
  • the secondary base station provided by the embodiment of the present invention can implement the RRC connection reestablishment between the secondary base station and the secondary base station according to the reconstruction preparation information acquired by the secondary base station at the primary base station, and solves the problem that when the primary base station fails the wireless link, the secondary base station wireless link is heavy.
  • the established problem improves the success rate of connection reconstruction between the terminal and the base station; in addition, the loss of data of the terminal used by the user can be avoided.
  • the embodiment of the present invention provides a secondary base station 6, as shown in FIG. 7, including: a second message sending unit 61, a second request sending unit 62, a second response receiving unit 63, and a second response sending unit 64, where:
  • the second message sending unit 61 is configured to receive an RRC connection reestablishment request message sent by the terminal.
  • the second request sending unit 62 is configured to send a third message to the primary base station, where the third message is used to request the primary base station to forward data.
  • the second response receiving unit 63 is configured to receive the third message response message sent by the primary base station, and save the packet data convergence protocol PDCP data packet forwarded by the primary base station, where the third message response message includes: carrying the uplink and downlink PDCP sequence number and the super frame Number HFN status information.
  • the HFN state information is used to notify the secondary base station of the air traffic data transmission and reception information of the current terminal, which is used to indicate which data packets are received, and which data packets have not been received, so that the secondary base station can determine the subsequent data transmission and reception.
  • the primary base station then forwards the data to the secondary base station, so that the data can be sent to the terminal through the secondary base station to avoid loss of user data.
  • a second response sending unit 64 configured to send an RRC connection reestablishment message to the terminal, where the RRC The connection reestablishment message is used to respond to the RRC Connection Reestablishment Request message.
  • the secondary base station provided by the embodiment of the present invention can implement the RRC connection reestablishment between the secondary base station and the secondary base station according to the reconstruction preparation information acquired by the secondary base station, and solves the problem that the secondary base station wireless link is re-established when the primary base station fails to generate a wireless link, and the problem is improved.
  • the success rate of the connection reestablishment between the terminal and the base station in addition, the loss of data of the terminal used by the user can be avoided.
  • An embodiment of the present invention provides a primary base station 7, as shown in FIG. 8, including: a third request sending unit 71 and a third response receiving unit 72, wherein: a third request sending unit 71 is configured to send a first message to a secondary base station, the first message is used to add a secondary base station to the terminal and carry the reconstruction preparation information, where the reconstruction preparation information includes the following one or a combination of any items: a primary cell identifier ID corresponding to the primary base station, and a terminal on the primary cell
  • the key corresponding to one or more cells of the secondary base station and the short integrity message authentication code specifically refer to a key derived by using the ID of the cell as a parameter and a short integrity message authentication code.
  • the third response receiving unit 72 is configured to receive a first message response message sent by the secondary base station.
  • the primary base station provided by the embodiment of the present invention can implement the RRC connection reestablishment between the secondary base station and the secondary base station according to the reconstruction preparation information acquired by the secondary base station at the primary base station, and solves the problem that the secondary base station wireless link is re-established when the primary base station fails to generate a wireless link. The problem is to improve the success rate of connection reconstruction between the terminal and the base station.
  • the primary base station 7 further includes: an update message sending unit 73, configured to send a second message to the secondary base station, where the second message is used to update the reconstruction preparation information, and the updated reconstruction preparation information is updated.
  • an update message sending unit 73 configured to send a second message to the secondary base station, where the second message is used to update the reconstruction preparation information, and the updated reconstruction preparation information is updated.
  • the connection re-establishment process may be a connection re-establishment process of Radio Resource Control (RRC).
  • RRC Radio Resource Control
  • the primary base station 7 further includes: a third request receiving unit 74 and a third response sending unit 75, where: The third request receiving unit 74 is configured to receive, by the secondary base station, a third message, where the third message is used to request the primary base station to forward data.
  • the third response sending unit 75 is configured to send a third message response message and a packet data convergence protocol PDCP data packet to the secondary base station according to the data forwarding request, where the third message response message includes: carrying the uplink and downlink PDCP sequence number and the super frame number HFN state information.
  • the primary base station provided by the embodiment of the present invention can implement the RRC connection reestablishment between the secondary base station and the secondary base station according to the reconstruction preparation information acquired by the secondary base station at the primary base station, and solves the problem that the secondary base station wireless link is re-established when the primary base station fails to generate a wireless link.
  • the problem is that the success rate of connection reconstruction between the terminal and the base station is improved; in addition, the loss of data of the terminal used by the user can be avoided.
  • An embodiment of the present invention provides a secondary base station 8, as shown in FIG. 10, including a first memory 81 and a first processor 82 connected to the first memory through a data bus, and a first memory 81 and a first process, respectively. At least one first inlet end 83 and at least one first outlet end 84 connected to the device 82, wherein:
  • the first processor 82 is configured to receive, by using the at least one first ingress terminal 83, a first message sent by the primary base station, where the first message is used to add a secondary base station to the terminal and carry the reconstruction preparation information, where the reconstruction preparation information includes the following item or The combination of any item: the primary cell identifier ID corresponding to the primary base station, the temporary identifier of the wireless network of the terminal on the primary cell, the key corresponding to the next or multiple cells of the secondary base station, the short integrity message authentication code, and the bearer information.
  • the key and the short integrity message authentication code corresponding to the next one or more cells of the secondary base station specifically refer to a key derived by using the ID of the cell as a parameter and a short integrity message authentication code.
  • the first memory 81 is configured to save the reconstruction preparation information and return the first message response message to the primary base station via the at least one first exit terminal 84.
  • the secondary base station provided by the embodiment of the present invention can implement the RRC connection reestablishment between the secondary base station and the secondary base station according to the reconstruction preparation information acquired by the secondary base station at the primary base station, and solve the problem that the secondary base station wireless link is re-established when the primary base station fails to generate a wireless link.
  • the problem is that the success rate of connection reconstruction between the terminal and the base station is improved.
  • the first processor 82 is further configured to receive, by the at least one first ingress terminal 83, the primary base station to send the second message and save the information by using the first memory 81, where the second message is used to update the reconstruction preparation information, and the updated Rebuild preparation information includes one or any of the following groups
  • the second message corresponding to the primary base station is used to update the reconstruction preparation information
  • the updated reconstruction preparation information includes the following one or a combination of any items: a primary cell identifier ID, a temporary identifier of the wireless network of the terminal on the primary cell, The key and short integrity message authentication code corresponding to one or more cells under the updated secondary base station, and the updated bearer information.
  • the first processor 82 is further configured to receive, by using the at least one first ingress end 83, an RRC connection reestablishment request message sent by the terminal, according to the RRC connection reestablishment request message, and the primary cell identifier ID of the terminal initiates the RRC connection reestablishment request message.
  • the terminal is authenticated.
  • the first processor 82 is further configured to: after the authentication is passed, select a key corresponding to the corresponding cell identifier ID of the secondary base station that initiates the RRC connection reestablishment request message by the terminal as a key for communicating with the terminal.
  • the specific first processor 82 is configured to send a third message to the primary base station by using the at least one first egress end 84; receive the third message response message sent by the primary base station by using the at least one first ingress end 83, and pass the first memory 81. And storing the packet data convergence protocol PDCP data packet forwarded by the primary base station, where the third message response message includes: carrying the uplink and downlink PDCP sequence number and the super frame number HFN state information; and sending the RRC connection reestablishment message to the terminal by using the at least one first egress terminal The RRC Connection Reestablishment message is used to respond to the RRC Connection Reestablishment Request message.
  • the secondary base station provided by the embodiment of the present invention can implement the RRC connection reestablishment between the secondary base station and the secondary base station according to the reconstruction preparation information acquired by the secondary base station at the primary base station, and solves the problem that the secondary base station wireless link is re-established when the primary base station fails to generate a wireless link.
  • the problem is that the success rate of connection reconstruction between the terminal and the base station is improved; in addition, the data loss of the terminal used by the user can be avoided.
  • An embodiment of the present invention provides a secondary base station 9, which includes a second memory 91 and a second processor 92 connected to the second memory through a data bus, and a second memory 91 and a second, respectively, as shown in FIG.
  • At least one second ingress end 93 and at least one second egress end 94 are connected to the processor 92, wherein: the second processor 92 is configured to receive, by using the at least one second ingress end 93, an RRC connection reestablishment request message sent by the terminal;
  • the second processor 92 is further configured to send, by using the at least one second egress end 94, a third message to the primary base station, where the third message is used to request the primary base station to forward data; and the primary base station sends the received by the at least one second ingress end 93.
  • the RRC connection reestablishment message is sent to the terminal by the at least one second egress end 94, and the RRC connection reestablishment message is used to respond to the RRC connection reestablishment request message.
  • the secondary base station provided by the embodiment of the present invention can implement the RRC connection reestablishment between the secondary base station and the secondary base station according to the reconstruction preparation information acquired by the secondary base station, and solves the problem that the secondary base station wireless link is re-established when the primary base station fails to generate a wireless link, and the problem is improved.
  • the success rate of the connection reestablishment between the terminal and the base station; in addition, the loss of data of the terminal used by the user can be avoided.
  • An embodiment of the present invention provides a primary base station 10, as shown in FIG. 12, including a third memory 1001 and a third processor 1002 connected to the third memory through a data bus, and a third memory and a third processor, respectively.
  • the third processor 1002 is configured to send the first message to the secondary base station by using the at least one third egress end 1004, where the first message is used
  • the reconstruction preparation information includes the following one or a combination of any items: a primary cell identifier ID corresponding to the primary base station, a temporary identifier of the wireless network of the terminal on the primary cell, and a secondary base station next Or a key and a short integrity message authentication code and bearer information corresponding to the multiple cells; and receiving, by the at least one third ingress end 1003, the first message response message sent by the secondary base station.
  • the key corresponding to one or more cells of the secondary base station and the short integrity message authentication code specifically refer to a key derived by using the ID of the cell as a parameter and a short integrity message authentication code.
  • the primary base station provided by the embodiment of the present invention can implement the RRC connection reestablishment between the secondary base station and the secondary base station according to the reconstruction preparation information acquired by the secondary base station at the primary base station, and solve the problem that the secondary base station wireless link is re-established when the primary base station fails the wireless link.
  • the problem is that the success rate of connection reconstruction between the terminal and the base station is improved.
  • the third processor 1002 is further configured to send, by using the at least one third egress end 1004, a second message to the secondary eNodeB, where the second message is used to update the reconfiguration preparation information, and the updated reconfiguration preparation information includes the following item: Or a combination of any items: a primary cell ID corresponding to the primary base station, a temporary identifier of the wireless network of the terminal on the primary cell, a key corresponding to one or more cells under the updated secondary base station, and a short integrity message authentication code, update Bearer information.
  • the third processor 1002 is further configured to connect through the at least one third ingress end 1003. Receiving a third message sent by the secondary base station, where the third message is used to request the primary base station to forward data; according to the third message, the third message response message and the packet data convergence protocol PDCP data are sent to the secondary base station through the at least one third egress terminal 1004.
  • the packet, where the third message response message includes: carrying the uplink and downlink PDCP sequence number and the super frame number HFN state information.
  • the primary base station provided by the embodiment of the present invention can implement the RRC connection reestablishment between the secondary base station and the secondary base station according to the reconstruction preparation information acquired by the secondary base station at the primary base station, and solves the problem that the secondary base station wireless link is re-established when the primary base station fails to generate a wireless link.
  • the problem is that the success rate of connection reconstruction between the terminal and the base station is improved; in addition, the loss of data of the terminal used by the user can be avoided.
  • the embodiment of the present invention provides a network system 1 1 , as shown in FIG.
  • the terminal 3 provided by the embodiment of the present invention is configured to initiate an RRC connection reestablishment request message to a frequency band in which the serving cell is located or a secondary base station corresponding to the serving cell.
  • the network system provided by the embodiment of the present invention can implement the RRC connection reestablishment between the secondary base station and the secondary base station according to the reconfiguration preparation information acquired by the secondary base station at the primary base station, and solves the problem that the secondary base station wireless link is re-established when the primary base station fails to generate a radio link.
  • the problem is that the success rate of connection reconstruction between the terminal and the base station is improved; in addition, the loss of data of the terminal used by the user can be avoided.

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Abstract

本发明实施例公开了一种RRC连接重建方法、设备和网络系统，涉及移动通信领域，解决了基站间的小区聚合中，当主基站发生了无线链路建立失败时辅基站无线链路重建立的问题，提高了终端与基站间连接重建的成功率。该方法具体包括接收主基站发送的第一消息，所述第一消息用于给终端增加辅基站并且携带重建准备信息，所述重建准备信息包括下面一项或任意项的组合：主基站对应的主小区标识符ID、终端在所述主小区上的无线网络临时标识、辅基站下一个或多个小区对应的密钥和短完整性消息鉴权码、承载信息；保存所述重建准备信息并返回第一消息响应消息至所述主基站。本发明用以终端与基站间的连接重建。

Description

一种 RRC连接重建方法、 设备和网络系统 技术领域 本发明涉及移动通信领域， 尤其涉及一种无线资源控制协议 RRC 连接重建方法、 设备和网络系统。
背景技术
随着移动通信系统的发展， 系统能够提供的服务质量越来越高。 为 保持第三代合作伙伴计戈 ( The Third Generation Partner ship Project,简 称 3GPP ) 的长期竟争优势， 长期演进系统的继续演进 （ Long Term Evolution-Advanced,简称 LTE-A)的标准制定工作正在进行。 为了进一步 的提高系统的频-潜效率和用户吞吐量， 载波聚合 （ Carrier Aggregation, 简称 CA )作为一种技术被引入到 LTE-A中。 载波聚合的意思是用户设 备（ User Equipment, 简称 UE )可以同时使用多个成员载波（ Component Carrier, 简称 CC ) 进行上下行通信 （ UE同时在多个小区上和网络进行 通信， 每个小区使用一个不同的载波） ， 从而支持高速数据传输。 这些 聚合的小区 （基站） 中， 其中一个是主小区 （主基站） ， 其他是辅小区 (辅基站） 。
LTE 系统的载波聚合可以分为基站内部小区聚合和基站间小区聚 合等。 基站内部的小区聚合是指 UE聚合的服务小区 （辅基站） 都属于 同一个主基站， 由于只受一个主基站控制， 相对来说比较简单。 3GPP 的 Release- 10版本支持基站内部的小区之间聚合。 在将来的版本可能会 引入基站间小区聚合， 此时， 聚合的小区可以属于不同的基站， 从而给 用户带来更好的用户体验。
为了保护空口的传输安全， 数据和信令需要进行加密， 密钥不在空 口传递，而是 UE和基站分别根据相同的参数进行衍生得到相同的密钥。 当 UE发生无线链路失败时， 会发起重建立过程， 为了验证 UE , 在重建 立请求消息里， UE会携带一个 16比特的 short MAC-I (短完整性消息 鉴权码）值，， 该 short MAC-I是使用重建立之前的密钥生成的， 目的是 为了验证 UE , 避免恶意的通过发送重建立来进行攻击， 在验证 UE后， 重建立过程会更新产生一个新的密钥。 此外， 根据当前标准的结论， UE 选择一个小区发起重建立， 只有这个小区的基站存在 UE的上下文才会 重建立成功。
在实现上述基站间载波聚合的重建立过程中， 发明人发现现有技术 中至少存在如下问题:对于基站间的小区聚合，当主基站发生了无线链路 失败时， 可能会出现辅基站发起的重建立不能成功的问题， 这会影响重 建立的成功率， 影响用户体验效果。 发明内容
本发明的实施例提供一种无线资源控制协议 RRC 连接重建方法、 设备和网络系统， 能够提高终端与基站间无线链路重建立成功率。 为达到上述目的， 本发明的实施例采用如下技术方案： 第一方面， 提供一种 RRC连接重建方法， 包括：
接收主基站发送的第一消息， 所述第一消息用于给终端增加辅基站 并且携带重建准备信息， 所述重建准备信息包括下面一项或任意项的组 合： 主基站对应的主小区标识符 ID、 终端在所述主小区上的无线网络临 时标识、 辅基站下一个或多个小区对应的密钥和短完整性消息鉴权码、 承载信息；
保存所述重建准备信息并返回第一消息响应消息至所述主基站。 在第一种可能的实现方式中， 结合第一方面， 该方法还包括： 接收所述主基站发送的第二消息并保存， 所述第二消息用于更新所 述重建准备信息。
在第二种可能的实现方式中， 结合第一方面或第一种可能的实现方 式， 该方法还包括： 接收所述终端发送的 RRC连接重建请求消息；
根据所述 RRC连接重建请求消息以及所述终端发起所述 RRC连接 重建请求消息的小区标识符 ID对所述终端进行鉴权；
鉴权通过后， 选择所述终端发起所述 RRC 连接重建请求消息的辅 基站下对应的小区标识符 ID对应的密钥作为与所述终端通信的密钥。 在第三种可能的实现方式中， 结合第二种可能的实现方式， 该方法 还包括： 向所述主基站发送第三消息， 所述第三消息用于请求所述主基站转 发数据；
接收所述主基站发送的第三消息响应消息并保存所述主基站转发 来的包数据汇聚协议 PDCP数据包， 其中所述第三消息响应消息包括： 携带上下行 PDCP序号和超帧数 HFN状态信息；
向所述终端发送 RRC连接重建消息， 所述 RRC连接重建消息用于 响应所述 RRC连接重建请求消息。
第二方面， 提供一种 RRC连接重建方法， 包括： 接收终端发送的 RRC连接重建请求消息； 向主基站发送第三消息， 所述第三消息用于请求所述主基站转发数 据；
接收所述主基站发送的第三消息响应消息并保存所述主基站转发 来的包数据汇聚协议 PDCP数据包， 其中所述第三消息响应消息包括： 携带上下行 PDCP序号和超帧数 HFN状态信息；
向所述终端发送 RRC连接重建消息， 所述 RRC连接重建消息用于 响应所述 RRC连接重建请求消息。
第三方面， 提供一种 RRC连接重建方法， 包括： 发送第一消息至辅基站， 所述第一消息用于给终端增加辅基站并且 携带重建准备信息， 所述重建准备信息包括下面一项或任意项的组合： 主基站对应的主小区标识符 ID、终端在所述主小区上的无线网络临时标 识、 辅基站下一个或多个小区对应的密钥和短完整性消息鉴权码、 承载 信息；
接收所述辅基站发送的第一消息响应消 , ¾。
在第一种可能的实现方式中， 结合第三方面， 该方法还包括： 向所述辅基站发送第二消息， 所述第二消息用于更新所述重建准备 信息。
在第二种可能的实现方式中， 结合第一种可能的实现方式， 具体的 实现为：
接收所述辅基站发送的第三消息， 所述第三消息用于请求主基站转 发数据；
根据所述第三消息向所述辅基站发送第三消息响应消息及包数据 汇聚协议 PDCP数据包， 其中所述第三消息响应消息包括： 携带上下行 PDCP序号和超帧数 HFN状态信息。 第四方面， 提供一种辅基站， 包括：
第一请求接收单元， 用于接收主基站发送的第一消息， 所述第一消 息用于给终端增加辅基站并且携带重建准备信息， 所述重建准备信息包 括下面一项或任意项的组合： 主基站对应的主小区标识符 ID、 终端在所 述主小区上的无线网络临时标识、 辅基站下一个或多个小区对应的密钥 和短完整性消息鉴权码、 承载信息； 第一响应发送单元， 用于保存所述重建准备信息并返回第一消息响 应消息至所述主基站。
在第一种可能的实现方式中， 结合第四方面， 所述辅基站还包括： 更新消息接收单元， 用于接收所述主基站发送的第二消息并保存， 所述第二消息用于更新所述重建准备信。
在第二种可能的实现方式中， 结合第四方面或第一种可能的实现方 式， 所述辅基站还包括： 第一消息发送单元， 用于接收所述终端发送的 RRC连接重建请求 消息；
第一消息处理单元， 用于根据所述 RRC连接重建请求消息以及所 述终端发起所述 RRC连接重建请求消息的小区标识符 ID对所述终端进 行鉴权；
第一鉴权管理单元， 用于鉴权通过后， 选择所述终端发起所述 RRC 连接重建请求消息的辅基站下对应的小区标识符 ID对应的密钥作为与 所述终端通信的密钥。
在第三种可能的实现方式中， 结合第二种可能的实现方式， 所述辅 基站还包括： 第一请求发送单元， 用于向所述主基站发送第三消息， 所述第三消 息用于请求所述主基站转发数据；
第一响应接收单元， 用于接收所述主基站发送的第三消息响应消息 并保存所述主基站转发来的包数据汇聚协议 PDCP数据包， 其中所述第 三消息响应消息包括： 携带上下行 PDCP序号和超帧数 HFN状态信息；
所述 RRC连接重建消息用于响应所述 RRC连接重建请求消息。 第五方面， 提供一种辅基站， 包括：
第二消息发送单元， 用于接收终端发送的 RRC连接重建请求消息； 第二请求发送单元， 用于向主基站发送第三消息， 所述第三消息用 于请求所述主基站转发数据；
第二响应接收单元， 用于接收所述主基站发送的第三消息响应消息 并保存所述主基站转发来的包数据汇聚协议 PDCP数据包， 其中所述第 三消息响应消息包括： 携带上下行 PDCP序号和超帧数 HFN状态信息； 第二响应发送单元， 用于向所述终端发送 RRC 连接重建消息， 所 述 RRC连接重建消息用于响应所述 RRC连接重建请求消息。 第六方面， 提供一种主基站， 包括：
第三请求发送单元， 用于发送第一消息至辅基站， 所述第一消息用 于给终端增加辅基站并且携带重建准备信息， 所述重建准备信息包括下 面一项或任意项的组合： 主基站对应的主小区标识符 ID、 终端在所述主 小区上的无线网络临时标识、 辅基站下一个或多个小区对应的密钥和短 完整性消息鉴权码、 承载信息；
第三响应接收单元， 用于接收所述辅基站发送的第一消息响应消 息。
在第一种可能的实现方式中， 结合第六方面， 所述主基站还包括： 更新消息发送单元， 用于向辅基站发送第二消息， 所述第二消息息 用于更新所述重建准备信。
在第二种可能的实现方式中， 结合第六方面或第一种可能的实现方 式， 所述主基站还包括：
第三请求接收单元， 用于接收所述辅基站发送的第三消息， 所述第 三消息用于请求主基站转发数据；
第三响应发送单元， 用于根据所述第三消息向所述辅基站发送第三 消息响应消息及包数据汇聚协议 PDCP数据包， 其中所述第三消息响应 消息包括： 携带上下行 PDCP序号和超帧数 HFN状态信息。 第七方面， 提供一种辅基站， 包括第一存储器和通过数据总线与所 述第一存储器连接的第一处理器， 以及分别与所述第一存储器和所述第 一处理器连接的至少一个第一入口段及与至少一个第一出口端； 所述第一处理器用于通过所述至少一个第一入口端接收主基站发 送的第一消息， 所述第一消息用于给终端增加辅基站并且携带重建准备 信息， 所述重建准备信息包括下面一项或任意项的组合： 主基站对应的 主小区标识符 ID、 终端在所述主小区上的无线网络临时标识、辅基站下 一个或多个小区对应的密钥和短完整性消息鉴权码、 承载信息；
所述第一存储器用于保存所述重建准备信息并通过所述至少一个 第一出口端返回第一消息响应消息至所述主基站。 在第一种可能的实现方式中， 结合第七方面， 所述第一处理器还用 于通过所述至少一个第一入口端接收所述主基站发送的第二消息并通 过所述第一存储器保存， 所述第二消息用于更新所述重建准备信息。
在第二种可能的实现方式中， 结合第七方面或第一种可能的实现方 式， 所述第一处理器还用于通过所述至少一个第一入口端接收所述终端 发送的 RRC连接重建请求消息； 根据所述 RRC连接重建请求消息以及 所述终端发起所述 RRC连接重建请求消息的小区标识符 ID在所述第一 存储器中对所述终端进行鉴权； 所述第一处理器还用于鉴权通过后， 选择所述终端发起所述 RRC 连接重建请求消息的辅基站下对应的小区标识符 ID对应的密钥作为与 所述终端通信的密钥。
在第三种可能的实现方式中， 结合第二种可能的实现方式， 所述第 一处理器具体用于通过所述至少一个第一出口端向所述主基站发送第 三消息， 所述第三消息用于请求主基站转发数据； 通过所述至少一个第 一入口端接收所述主基站发送的第三消息响应消息并通过所述第一存 储器保存所述主基站转发来的包数据汇聚协议 P D C P数据包， 其中所述 第三消息响应消息包括： 携带上下行 PDCP序号和超帧数 HFN状态信 息； 通过所述至少一个第二出口端向所述终端发送 RRC连接重建消息， 所述 RRC连接重建消息用于响应所述 RRC连接重建请求消息。 第八方面， 提供一种辅基站， 包括第二存储器和通过数据总线与所 述第二存储器连接的第二处理器， 以及分别与所述第二存储器和所述第 二处理器连接的至少一个第二入口端及至少一个第二出口端， 其中： 所述第二处理器， 用于通过所述至少一个第二入口端接收终端发送 的 RRC连接重建请求消息；
所述第二处理器， 还用于通过所述至少一个第二出口端向主基站发 送第三消息， 所述第三消息用于请求所述主基站转发数据； 通过所述至 少一个第二入口端接收所述主基站发送的第三消息响应消息并通过所 述第二存储器保存所述主基站转发来的包数据汇聚协议 PDCP数据包， 其中所述第三消息响应消息包括：携带上下行 PDCP序号和超帧数 HFN 状态信息； 通过所述至少一个第二出口端向所述终端发送 RRC 连接重 建消息 ,所述 RRC连接重建消息用于响应所述 RRC连接重建请求消息。 第九方面， 提供一种主基站， 包括第三存储器和通过数据总线与所 述第三存储器连接的第三处理器， 以及分别与所述第三存储器和所述第 三处理器连接的至少一个第三入口端及至少一个第三出口端，
所述第三处理器用于通过所述至少一个第三出口端发送第一消息 至辅基站， 所述第一消息用于给终端增加辅基站并且携带重建准备信 息， 所述重建准备信息包括下面一项或任意项的组合： 主基站对应的主 小区标识符 ID、 终端在所述主小区上的无线网络临时标识、辅基站下一 个或多个小区对应的密钥和短完整性消息鉴权码、 承载信息； 通过所述 至少一个第三入口端接收所述辅基站发送的第一消息响应消息。 在第一种可能的实现方式中， 结合第九方面， 所述第三处理器还用 于通过所述至少一个第三出口端向所述辅基站发送第二消息， 所述第二 消息用于更新所述重建准备信息。
在第二种可能的实现方式中， 结合第九方面或第一种可能的实现方 式， 所述第三处理器还用于通过所述至少一个第三入口端接收所述辅基 站发送的第三消息， 所述第三消息用于请求主基站转发数据； 根据所述 第三消息通过所述至少一个第三出口端向所述辅基站发送第三消息响 应消息及所述第三存储器中的包数据汇聚协议 PDCP数据包， 其中所述 第三消息响应消息包括： 携带上下行 PDCP序号和超帧数 HFN状态信 息。
第十方面， 提供一种网络系统， 包括： 主基站、 辅基站和终端， 所 述主基站为第六方面所述的主基站， 所述辅基站为第四方面和第五方面 所述辅基站；
或， 所述主基站为第九方面所述的主基站， 所述辅基站为第七方面 和第八方面所述的辅基站。 在第一种可能的实现方式中， 结合第十方面， 所述终端用于向服务 小区所在的频段或服务小区对应的辅基站发起 RRC连接重建请求消息。 本发明的实施例提供的 RRC 连接重建方法、 设备和网络系统， 能 够实现终端根据辅基站获取的重建准备信息与辅基站实现 RRC 连接重 建， 解决了当主基站发生了无线链路失败时， 辅基站无线链路重建立的 问题， 提高了终端与基站间连接重建的成功率。
附图说明
对实施例或现有技术描述中所需要使用的附图作简单地介绍， 显而易见 地， 下面描述中的附图仅仅是本发明的一些实施例， 对于本领域普通技 术人员来讲， 在不付出创造性劳动的前提下， 还可以根据这些附图获得 其他的附图。 图 1为本发明的实施例提供的一种 RRC连接重建方法流程示意图； 图 2为本发明的实施例提供的另一种 RRC连接重建方法流程示意 图；
图 3 为本发明的另一实施例提供的一种 RRC连接重建方法流程示 意图；
图 4为本发明的另一实施例提供的另一种 RRC连接重建方法流程 示意图；
图 5为本发明的实施例提供的一种辅基站结构示意图； 图 6为本发明的实施例提供的另一种辅基站结构示意图；
图 7为本发明的另一实施例提供的一种辅基站结构示意图； 图 8为本发明的实施例提供的一种主基站结构示意图；
图 9为本发明的实施例提供的另一种主基站结构示意图； 图 10为本发明的另一实施例提供的另一种辅基站结构示意图； 图 1 1为本发明的又一实施例提供的一种辅基站结构示意图； 图 12为本发明的又一实施例提供的一种主基站结构示意图； 图 13为本发明的实施例提供的一种网络系统的结构示意图。
具体实施方式 下面将结合本发明实施例中的附图， 对本发明实施例中的技术方案 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。 本发明的实施例提供一种 RRC 连接重建方法， 在辅基站侧， 参照 图 1所示， 包括以下步骤：
101、 辅基站接收主基站发送的第一消息， 此第一消息用于给终端 增加辅基站。 其中， 第一消息携带重建准备信息， 重建准备信息包括： 下面一项 或任意项的组合： 主基站对应的主小区标识符 ID、 终端在主小区上的无 线网络临时标识、 辅基站下一个或多个小区对应的密钥和短完整性消息 鉴权码、 承载信息。 这样当终端发生了无线链路失败或切换失败时， 选 择辅基站下的主基站发起无线资源控制 （ Radio Resource Control, 简称 RRC )连接重建立流程时，辅基站能根据主基站对应的主小区标识符 ID , 主基站无线网络临时标识来识别终端， 通过辅基站下重建小区的标识符 ID和短完整性消息鉴权码对终端进行鉴权， 在重建成功后， 使用辅基站 下重建的小区对应的密钥对传输的数据进行加密和完整性保护， 通过承 载信息进行承载的恢复。 其中， 辅基站下一个或多个小区对应的密钥和 短完整性消息鉴权码， 具体指的是采用该小区的 ID作为参数衍生的密 钥和短完整性消息鉴权码。
102、 辅基站保存重建准备信息并返回第一消息响应消息至主基站。 可选的， 当在重建准备信息发生变化时， 该方法还包括： 辅基站接 收主基站发送的第二消息并保存， 该第二消息用于更新重建准备信息， 且该更新的重建准备信息包括下面一项或任意项的组合： 主基站对应的 主小区标识符 ID、 终端在主小区上的无线网络临时标识、 更新的辅基站 下一个或多个小区对应的密钥和短完整性消息鉴权码列表、 更新的承载 信息； 以此保证终端发起连接重建立过程的成功概率。 当然该辅基站为 主基站控制范围内的基站， 及辅基站对应的小区为主基站内的小区。 这 里重建准备信息可能会在增加辅基站下的小区后， 承载和密钥发生变化 时随之变化， 如当移动控制实体请求基站增加承载或者终端发生切换时 主基站上对应的密钥发生再次衍生进而更新了重建准备信息。 本发明的实施例提供的 RRC 连接重建方法， 能够实现终端根据辅 基站在主基站获取的重建准备信息与辅基站实现 RRC 连接重建， 解决 了当主基站发生了无线链路失败时， 辅基站无线链路重建立的问题， 提 高了终端与基站间连接重建的成功率。
本发明的实施例提供一种 RRC 连接重建方法， 在主基站侧， 参照 图 2所示， 包括以下步骤：
201、 主基站发送第一消息至辅基站， 此第一消息用于给终端增加 辅基站。
其中， 第一消息携带重建准备信息， 重建准备信息包括下面一项或 任意项的组合： 主基站对应的主小区标识符 ID、 终端在主小区上的无线 网络临时标识、 辅基站下一个或多个小区对应的密钥和短完整性消息鉴 权码、 承载信息。 这样当终端发生了无线链路失败或切换失败时， 选择 辅基站下的主基站发起无线资源控制 （Radio Resource Control , 简称 RRC )连接重建立流程时，辅基站能根据主基站对应的主小区标识符 ID , 主基站无线网络临时标识来识别终端， 通过辅基站下重建小区的标识符 ID和短完整性消息鉴权码对终端进行鉴权， 在重建成功后， 使用辅基站 下重建的小区对应的密钥对传输的数据进行加密和完整性保护， 通过承 载信息进行承载的恢复。 其中， 辅基站下一个或多个小区对应的密钥和 短完整性消息鉴权码， 具体指的是采用该小区的 ID作为参数衍生的密 钥和短完整性消息鉴权码。
202、 主基站接收辅基站发送的第一消息响应消息。
可选的， 当在重建准备信息发生变化时， 该方法还包括： 主基站向 辅基站发送第二消息， 该第二消息用于更新重建准备信息，
且该更新后的重建准备信息包括下面一项或任意项的组合： 主基站 对应的主小区标识符 ID、 终端在主小区上的无线网络临时标识、 更新的 辅基站下一个或多个小区对应的密钥和短完整性消息鉴权码、 更新的承 载信息。 以此保证终端发起连接重建立过程的成功概率， 当然该连接重 建立过程可以为无线资源控制 （ Radio Resource Control , 简称 RRC ) 的 连接重建立过程。 这里重建准备信息可能会在增加辅基站下的小区后， 承载和密钥发生变化时随之变化， 如当移动控制实体请求基站增加承载 或者终端发生切换时主基站上对应的密钥发生再次衍生进而更新了重 建准备信息。
本发明的实施例提供的 RRC 连接重建方法， 能够实现终端根据辅 基站在主基站获取的重建准备信息与辅基站实现 RRC 连接重建， 解决 了当主基站发生了无线链路失败时， 辅基站无线链路重建立的问题， 提 高了终端与基站间连接重建的成功率。
具体的参照图 3所示， 本发明实施例提供一种 RRC连接重建方法， 其中图 3中只是示出了各个步骤中的关键词汇， 具体请参照说明书的内 容， 包括：
301、 主基站发送第一消息至辅基站， 此第一消息用于给终端增加 辅基站。
302、 辅基站接收主基站发送的第一消息。
其中， 第一消息携带重建准备信息， 重建准备信息包括下面一项或 任意项的组合： 主基站对应的主小区标识符 ID、 终端在主小区上的无线 网络临时标识、 辅基站下一个或多个小区对应的密钥和短完整性消息鉴 权码、 承载信息。 这样当终端发生了无线链路失败或切换失败时， 选择 辅基站下的主基站发起无线资源控制 （Radio Resource Control , 简称 RRC )连接重建立流程时，辅基站能根据主基站对应的主小区标识符 ID , 主基站无线网络临时标识来识别终端， 通过辅基站下重建小区的标识符 ID和短完整性消息鉴权码对终端进行鉴权， 在重建成功后， 使用辅基站 下重建的小区对应的密钥对传输的数据进行加密和完整性保护， 通过承 载信息进行承载的恢复。 其中， 辅基站下一个或多个小区对应的密钥和 短完整性消息鉴权码， 具体指的是采用该小区的 ID作为参数衍生的密 钥和短完整性消息鉴权码。
303、 辅基站保存重建准备信息并返回第一消息响应消息至主基站。
304、 主基站接收辅基站发送的第一消息响应消息。
进一步可选， 由于重建准备信息可能会在增加辅基站下的小区后， 承载和密钥发生变化时随之变化， 如当移动控制实体请求基站增加承载 或者终端发生切换时主基站上对应的密钥发生再次衍生进而更新重建 准备信息， 以此该方法还包括：
305、 主基站向辅基站发送第二消息， 此第二消息用于更新重建准 备信息。
其中更新的重建准备信息包括下面一项或任意项的组合： 主基站对 应的主小区标识符 ID、 终端在主小区上的无线网络临时标识、 更新的辅 基站下一个或多个小区对应的密钥和短完整性消息鉴权码、 更新的承载 信息。 这样， 通过实时更新重建准备信息保证终端发起连接重建立过程 的成功概率。
306、 辅基站接收主基站发送的第二消息并保存。 本发明的实施例提供的 RRC 连接重建方法， 解决了当主基站发生 无线链路失败时， 可能会出现辅辅基站发起的重建立不能成功的问题， 提高了辅基站间重建立的成功率。
进一步的， 参照图 3所示， 本发明的实施例提供的方法还包括如下 步骤：
307、 辅基站接收终端发送的 RRC连接重建请求消息。
这里， 终端可以向服务小区所在的频段或服务小区对应的辅基站发 起 RRC连接重建请求消息。
308、 辅基站根据 RRC连接重建请求消息以及终端发起的 RRC连 接重建请求消息的小区标识符 ID对终端进行鉴权；
如果辅基站里保存的终端发起重建立的接入小区标识符 ID对应的 鉴权码和重建立请求里的鉴权码相同， 则鉴权通过， 否则不通过， 当然 这里辅基站中保存的小区标识符 ID对应的鉴权码可以为主基站通过消 息 （如重建准备信息）发送至辅基站的， 也可以是主基站与辅基站之间 在发生的历次通讯关系中保留。
309、 鉴权通过后， 选择终端发起 RRC连接重建请求消息的辅基站 下对应的小区标识符 ID对应的密钥作为与终端通信的密钥。
310、 辅基站向主基站发送第三消息， 该第三消息用于请求主基站 转发数据。
31 1、 主基站接收辅基站发送的第三消息。
312、 主基站根据第三消息向辅基站发送第三消息响应消息及包数 据汇聚协议 PDCP 数据包， 其中第三消息响应消息包括： 携带上下行 PDCP序号和超帧数 HFN状态信息。
313、 辅基站接收主基站发送的第三消息响应消息并保存主基站转 发来的包数据汇聚协议 PDCP数据包。
携带上下行 PDCP序号和超帧数 HFN状态信息用于通知辅基站当 前终端的空口数据收发信息， 用来指示哪些数据包收到了， 哪些数据包 还没收到， 便于辅基站决定后续的数据收发。 然后主基站将数据转发给 辅基站， 使得这些数据能通过辅基站下发给终端， 以避免用户数据的丟 失。 314、 辅基站向终端发送 RRC连接重建消息， 该 RRC连接重建消 息用于响应 RRC连接重建请求消息。
值得一提的是， 步骤 310-313也可以发生在步骤 314后面， 即在步 骤 314后，终端向辅基站发送 RRC连接重建完成消息，辅基站收到 RRC 连接重建完成消息后， 触发步骤 310-313。
这里， 辅基站通知主基站重建立过程发生， 并请求数据转发， 主基 站转发数据给辅基站， 避免了由于基站间重建立过程造成的用户数据的 丟失。
此外， 在上述实施例提供的方法步骤之前， 当终端发生了无线链路 失败后， 终端发起重建立过程之前会执行小区选择过程来寻找一个合适 小区驻留 （合适小区指信号强度超过预设的信号强度阈值） ， 在本实施 例里，终端优选搜索服务小区所在的频段或服务基站（主基站、辅基站）， 从而能尽量使终端在有终端上下文的基站下发起重建立过程， 提高重建 立过程的成功率。 本发明的实施例提供的 RRC 连接重建方法， 能够实现终端根据辅 基站在主基站获取的重建准备信息与辅基站实现 RRC 连接重建， 解决 了当主基站发生了无线链路失败时， 辅基站无线链路重建立的问题， 提 高了终端与基站间连接重建的成功率； 此外能够避免用户使用的终端的 数据丟失。
本发明的实施例提供一种 RRC连接重建方法， 参照图 4所示， 包 括以下步骤：
401、 辅基站接收终端发送的 RRC连接重建请求消息。
402、 辅基站向主基站发送第三消息， 该第三消息用于请求主基站 转发数据。
403、 主基站接收辅基站发送的第三消息。
404、 主基站根据第三消息向辅基站发送第三消息响应消息及包数 据汇聚协议 PDCP 数据包， 其中第三消息响应消息包括： 携带上下行 PDCP序号和超帧数 HFN状态信息。
405、 辅基站接收主基站发送的第三消息响应消息并保存主基站转 发来的包数据汇聚协议 PDCP数据包。 携带上下行 PDCP序号和超帧数 HFN状态信息用于通知辅基站当 前终端的空口数据收发信息， 用来指示哪些数据包收到了， 哪些数据包 还没收到， 便于辅基站决定后续的数据收发。 然后主基站将数据转发给 辅基站， 使得这些数据能通过辅基站下发给终端， 以避免用户数据的丟 失。
406、 辅基站向终端发送 RRC连接重建消息， 该 RRC连接重建消 息用于响应 RRC连接重建请求消息。 值得一提的是， 步骤 402-405也可以发生在步骤 406后面， 即在步 骤 406后，终端向辅基站发送 RRC连接重建完成消息，辅基站收到 RRC 连接重建完成消息后， 触发步骤 402-405。
这里， 辅基站通知主基站重建立过程发生， 并请求数据转发， 主基 站转发数据给辅基站， 避免了由于基站间重建立过程造成的用户数据的 丟失。 具体的为， 在上述实施例提供的方法步骤之前， 当终端发生了无线 链路失败后， 终端发起重建立过程之前会执行小区选择过程来寻找一个 合适小区驻留 （合适小区指信号强度超过预设的信号强度阈值） ， 在本 实施例里， 终端优选搜索服务小区所在的频段或服务基站 （主基站、 辅 基站） ， 从而能尽量使终端在有终端上下文的基站下发起重建立过程， 提高重建立过程的成功率。
本发明的实施例提供的 RRC 连接重建方法， 能够实现终端根据辅 基站获取的重建准备信息与辅基站实现 RRC 连接重建， 解决了当主基 站发生了无线链路失败时， 辅基站无线链路重建立的问题， 提高了终端 与基站间连接重建的成功率； 此外能够避免用户使用的终端的数据的丟 失。
本发明的实施例提供一种辅基站 5 , 参照图 5所示， 包括第一请求 接收单元 51和第一响应发送单元 52 , 其中： 第一请求接收单元 51 , 用于接收主基站发送的第一消息， 第一消息 用于给终端增加辅基站并且携带重建准备信息， 该重建准备信息包括下 面一项或任意项的组合： 主基站对应的主小区标识符 ID、 终端在主小区 上的无线网络临时标识、 辅基站下一个或多个小区对应的密钥和短完整 性消息鉴权码、 承载信息。
第一响应发送单元 52 ,用于保存重建准备信息并返回第一消息响应 消息至主基站。 本发明的实施例提供的辅基站， 能够实现终端根据辅基站在主基站 获取的重建准备信息与辅基站实现 RRC 连接重建， 解决了当主基站发 生了无线链路失败时， 辅基站无线链路重建立的问题， 提高了终端与基 站间连接重建的成功率。 进一步， 可选的， 参照图 5所示， 辅基站 5还包括：
更新消息接收单元 53 , 用于接收主基站发送的第二消息并保存， 该 第二消息用于更新重建准备信息， 且该更新的重建准备信息包括下面一 项或任一项的组合： 主基站对应的主小区标识符 ID、 终端在主小区上的 无线网络临时标识、 更新的辅基站下的一个或多个小区对应的密钥和短 完整性消息鉴权码、 更新的承载信息。
通过该第二消息保证了重建准备信息的时刻更新， 进而保证终端发 起连接重建立过程的成功概率。 可选的， 参照图 6所示， 辅基站 5还包括：
第一消息发送单元 54 , 用于接收终端发送的 RRC连接重建请求消 息。
第一鉴权单元 55 , 用于根据 RRC连接重建请求消息以及终端发起
RRC连接重建请求消息的主小区标识符 ID对终端进行鉴权；
第一鉴权管理单元 56 , 用于鉴权通过后， 选择终端发起 RRC连接 重建请求消息的辅基站下对应的小区标识符 ID对应的密钥作为与终端 通信的密钥。
可选的， 辅基站 5还包括：
第一请求发送单元 57 , 用于向主基站发送第三消息， 该第三消息用 于请求主基站转发数据。
第一响应接收单元 58 ,用于接收主基站发送的第三消息响应消息并 保存主基站转发来的包数据汇聚协议 PDCP数据包， 其中第三消息响应 消息包括： 携带上下行 PDCP序号和超帧数 HFN状态信息。
第一响应发送单元 52 , 还用于向终端发送 RRC连接重建消息， 该 RRC连接重建消息用于响应 RRC连接重建请求消息。
这里， 携带上下行 PDCP序号和超帧数 HFN状态信息用于通知辅 基站当前终端的空口数据收发信息， 用来指示哪些数据包收到了， 哪些 数据包还没收到， 便于辅基站决定后续的数据收发。 然后主基站将数据 转发给辅基站， 使得这些数据能通过辅基站下发给终端， 以避免用户数 据的丟失。 本发明的实施例提供的辅基站， 能够实现终端根据辅基站在主基站 获取的重建准备信息与辅基站实现 RRC 连接重建， 解决了当主基站发 生了无线链路失败时， 辅基站无线链路重建立的问题， 提高了终端与基 站间连接重建的成功率； 此外能够避免用户使用的终端的数据的丟失。
本发明的实施例提供一种辅基站 6 , 如图 7所示， 包括： 第二消息 发送单元 61、 第二请求发送单元 62、 第二响应接收单元 63和第二响应 发送单元 64 , 其中： 第二消息发送单元 61 , 用于接收终端发送的 RRC连接重建请求消 息。
第二请求发送单元 62 , 用于向主基站发送第三消息， 此第三消息用 于请求主基站转发数据。
第二响应接收单元 63 ,用于接收主基站发送的第三消息响应消息并 保存主基站转发来的包数据汇聚协议 PDCP数据包， 其中第三消息响应 消息包括： 携带上下行 PDCP序号和超帧数 HFN状态信息。
携带上下行 PDCP序号和超帧数 HFN状态信息用于通知辅基站当 前终端的空口数据收发信息， 用来指示哪些数据包收到了， 哪些数据包 还没收到， 便于辅基站决定后续的数据收发。 然后主基站将数据转发给 辅基站， 使得这些数据能通过辅基站下发给终端， 以避免用户数据的丟 失。
第二响应发送单元 64 ,用于向终端发送 RRC连接重建消息，该 RRC 连接重建消息用于响应 RRC连接重建请求消息。 本发明实施例提供的辅基站， 能够实现终端根据辅基站获取的重建 准备信息与辅基站实现 RRC 连接重建， 解决了当主基站发生无线链路 失败时， 辅基站无线链路重建立的问题， 提高了终端与基站间连接重建 的成功率； 此外能够避免用户使用的终端的数据的丟失。
本发明的实施例提供一种主基站 7 , 如图 8所示， 包括： 第三请求 发送单元 71和第三响应接收单元 72 , 其中： 第三请求发送单元 71 , 用于发送第一消息至辅基站， 该第一消息用 于给终端增加辅基站并且携带重建准备信息， 此重建准备信息包括下面 一项或任意项的组合： 主基站对应的主小区标识符 ID、 终端在主小区上 的无线网络临时标识、 辅基站下一个或多个小区对应的密钥和短完整性 消息鉴权码、 承载信息。 辅基站下一个或多个小区对应的密钥和短完整性消息鉴权码， 具体 指的是采用该小区的 ID作为参数衍生的密钥和短完整性消息鉴权码。
第三响应接收单元 72 , 用于接收辅基站发送的第一消息响应消息。 本发明的实施例提供的主基站， 能够实现终端根据辅基站在主基站 获取的重建准备信息与辅基站实现 RRC 连接重建， 解决了当主基站发 生无线链路失败时， 辅基站无线链路重建立的问题， 提高了终端与基站 间连接重建的成功率。
进一步可选的， 参照图 8所示， 主基站 7还包括： 更新消息发送单元 73 , 用于向辅基站发送第二消息， 该第二消息用 于更新重建准备信息， 且更新的重建准备信息包括下面一项或任意项的 组合： 主基站对应的主小区 ID、 终端在主小区上的无线网络临时标识、 更新的辅基站下的一个或多个小区对应的密钥和短完整性消息鉴权码、 更新的承载信息。 以此保证终端发起连接重建立过程的成功概率， 当然 该连接重建立过程可以为无线资源控制 （ Radio Resource Control , 简称 RRC ) 的连接重建立过程。 可选的参照图 9所示， 主基站 7还包括： 第三请求接收单元 74、 第 三响应发送单元 75 , 其中： 第三请求接收单元 74 , 用于接收辅基站发送第三消息， 该第三消息 用于请求主基站转发数据。
第三响应发送单元 75 ,用于根据数据转发请求向辅基站发送第三消 息响应消息及包数据汇聚协议 PDCP数据包， 其中第三消息响应消息包 括： 携带上下行 PDCP序号和超帧数 HFN状态信息。 本发明的实施例提供的主基站， 能够实现终端根据辅基站在主基站 获取的重建准备信息与辅基站实现 RRC 连接重建， 解决了当主基站发 生无线链路失败时， 辅基站无线链路重建立的问题， 提高了终端与基站 间连接重建的成功率； 此外能够避免用户使用的终端的数据的丟失。
本发明的实施例提供一种辅基站 8 , 如图 10所示， 包括第一存储器 81 和通过数据总线与第一存储器连接的第一处理器 82 , 以及分别与第 一存储器 81和第一处理器 82连接的至少一个第一入口端 83及至少一 个第一出口端 84 , 其中：
第一处理器 82用于通过至少一个第一入口端 83接收主基站发送的 第一消息， 该第一消息用于给终端增加辅基站并且携带重建准备信息， 此重建准备信息包括下面一项或任意项的组合： 主基站对应的主小区标 识符 ID、 终端在主小区上的无线网络临时标识、辅基站下一个或多个小 区对应的密钥和短完整性消息鉴权码、 承载信息。 此处辅基站下一个或多个小区对应的密钥和短完整性消息鉴权码， 具体指的是采用该小区的 ID作为参数衍生的密钥和短完整性消息鉴权 码。
第一存储器 81 用于保存重建准备信息并通过至少一个第一出口端 84返回第一消息响应消息至主基站。 本发明的实施例提供的辅基站， 能够实现终端根据辅基站在主基站 获取的重建准备信息与辅基站实现 RRC 连接重建， 解决当主基站发生 无线链路失败时， 辅基站无线链路重建立的问题， 提高了终端与基站间 连接重建的成功率。
进一步可选的， 第一处理器 82还用于通过至少一个第一入口端 83 接收主基站发送第二消息并通过第一存储器 81 保存， 该第二消息用于 更新重建准备信息， 且更新的重建准备信息包括下面一项或任意项的组 合： 主基站对应的该第二消息用于更新重建准备信息， 且更新的重建准 备信息包括下面一项或任意项的组合： 主小区标识符 ID、 终端在主小区 上的无线网络临时标识、 更新的辅基站下的一个或多个小区对应的密钥 和短完整性消息鉴权码、 更新的承载信息。 可选的， 第一处理器 82还用于通过至少一个第一入口端 83接收终 端发送的 RRC连接重建请求消息， 根据 RRC连接重建请求消息以及终 端发起 RRC连接重建请求消息的主小区标识符 ID对终端进行鉴权。
第一处理器 82, 还用于鉴权通过后， 选择终端发起 RRC连接重建 请求消息的辅基站下对应的小区标识符 ID对应的密钥作为与终端通信 的密钥。
具体的第一处理器 82 , 用于通过至少一个第一出口端 84向主基站 发送第三消息； 通过至少一个第一入口端 83 接收主基站发送的第三消 息响应消息及通过第一存储器 81 保存主基站转发来的包数据汇聚协议 PDCP数据包， 其中第三消息响应消息包括： 携带上下行 PDCP序号和 超帧数 HFN状态信息； 并通过至少一个第一出口端向终端发送 RRC连 接重建消息， 该 RRC连接重建消息用于响应 RRC连接重建请求消息。 本发明实施例提供的辅基站， 能够实现终端根据辅基站在主基站获 取的重建准备信息与辅基站实现 RRC 连接重建， 解决了当主基站发生 无线链路失败时， 辅基站无线链路重建立的问题， 提高了终端与基站间 连接重建的成功率； 此外能够避免用户使用的终端的数据的丟失。
本发明的实施例提供一种辅基站 9 , 参照图 1 1所示， 包括第二存储 器 91和通过数据总线与第二存储器连接的第二处理器 92 , 以及分别与 第二存储器 91和第二处理器 92连接的至少一个第二入口端 93及至少 一个第二出口端 94 , 其中： 第二处理器 92, 用于通过至少一个第二入口端 93接收终端发送的 RRC连接重建请求消息； 进一步的， 第二处理器 92还用于通过至少一个第二出口端 94向主 基站发送第三消息， 该第三消息用于请求主基站转发数据； 通过至少一 个第二入口端 93 接收主基站发送的第三消息响应消息并通过第二存储 器 91保存主基站转发来的包数据汇聚协议 PDCP数据包， 其中第三消 息响应消息包括： 携带上下行 PDCP序号和超帧数 HFN状态信息； 同 时，通过至少一个第二出口端 94向终端发送 RRC连接重建消息，该 RRC 连接重建消息用于响应 RRC连接重建请求消息。 本发明实施例提供的辅基站， 能够实现终端根据辅基站获取的重建 准备信息与辅基站实现 RRC 连接重建， 解决了当主基站发生无线链路 失败时， 辅基站无线链路重建立的问题， 提高了终端与基站间连接重建 的成功率； 此外能够避免用户使用的终端的数据的丟失。
本发明的实施例提供一种主基站 10 , 如图 12所示， 包括第三存储 器 1001和通过数据总线与第三存储器连接的第三处理器 1002 , 以及分 别与第三存储器和第三处理器连接的至少一个第三入口端 1003 及至少 一个第三出口端 1004 , 其中： 第三处理器 1002 , 用于通过至少一个第三出口端 1004发送第一消 息至辅基站， 该第一消息用于给终端增加辅基站并且携带重建准备信 息， 此重建准备信息包括下面一项或任意项的组合： 主基站对应的主小 区标识符 ID、 终端在主小区上的无线网络临时标识、辅基站下一个或多 个小区对应的密钥和短完整性消息鉴权码、 承载信息； 通过至少一个第三入口端 1003 接收辅基站发送的第一消息响应消 息。
辅基站下一个或多个小区对应的密钥和短完整性消息鉴权码， 具体 指的是采用该小区的 ID作为参数衍生的密钥和短完整性消息鉴权码。 本发明实施例提供的主基站， 能够实现终端根据辅基站在主基站获 取的重建准备信息与辅基站实现 RRC 连接重建， 解决当主基站发生了 无线链路失败时， 辅基站无线链路重建立的问题， 提高了终端与基站间 连接重建的成功率。
进一步可选的， 第三处理器 1002还用于通过至少一个第三出口端 1004向辅基站发送第二消息， 该第二消息用于更新重建准备信息， 且更 新的重建准备信息包括下面一项或任意项的组合： 主基站对应的主小区 ID、 终端在主小区上的无线网络临时标识、 更新的辅基站下的一个或多 个小区对应的密钥和短完整性消息鉴权码、 更新的承载信息。
可选的， 第三处理器 1002还用于通过至少一个第三入口端 1003接 收辅基站发送的第三消息， 该第三消息用于请求主基站转发数据； 根据 此第三消息通过至少一个第三出口端 1004 向辅基站发送第三消息响应 消息及包数据汇聚协议 PDCP数据包， 其中第三消息响应消息包括： 携 带上下行 PDCP序号和超帧数 HFN状态信息。 本发明的实施例提供的主基站， 能够实现终端根据辅基站在主基站 获取的重建准备信息与辅基站实现 RRC 连接重建， 解决了当主基站发 生无线链路失败时， 辅基站无线链路重建立的问题， 提高了终端与基站 间连接重建的成功率； 此外能够避免用户使用的终端的数据的丟失。 本发明的实施例提供一种网络系统 1 1 , 如图 13所示， 包括主基站 1、 辅基站 2和终端 3 , 此主基站 1为设备实施例中的任一主基站， 辅基 站 2为设备实施例中的任一辅基站。 可选的， 本发明实施例提供的终端 3用于向服务小区所在的频段或 服务小区对应的辅基站发起 RRC连接重建请求消息。 本发明的实施例提供的网络系统， 能够实现终端根据辅基站在主基 站获取的重建准备信息与辅基站实现 RRC 连接重建， 解决了当主基站 发生无线链路失败时， 辅基站无线链路重建立的问题， 提高了终端与基 站间连接重建的成功率； 此外能够避免用户使用的终端的数据的丟失。
本领域普通技术人员可以理解： 实现上述方法实施例的全部或部分 步骤可以通过程序指令相关的硬件来完成， 前述的程序可以存储于一计 算机可读取存储介质中， 该程序在执行时， 执行包括上述方法实施例的 步骤； 而前述的存储介质包括： ROM、 RAM, 磁碟或者光盘等各种可 以存储程序代码的介质。
以上所述， 仅为本发明的具体实施方式， 但本发明的保护范围并不 局限于此， 任何熟悉本技术领域的技术人员在本发明揭露的技术范围 内， 可轻易想到变化或替换， 都应涵盖在本发明的保护范围之内。 因此， 本发明的保护范围应以所述权利要求的保护范围为准。

Claims

权 利 要 求 书
1、 一种 RRC连接重建方法， 其特征在于， 包括： 接收主基站发送的第一消息， 所述第一消息用于给终端增加辅基站 并且携带重建准备信息， 所述重建准备信息包括下面一项或任意项的组 合： 主基站对应的主小区标识符 ID、 终端在所述主小区上的无线网络临 时标识、 辅基站下一个或多个小区对应的密钥和短完整性消息鉴权码、 承载信息；
保存所述重建准备信息并返回第一消息响应消息至所述主基站。
2、 根据权利要求 1所述的方法， 其特征在于， 所述方法还包括： 接收所述主基站发送的第二消息并保存， 所述第二消息用于更新所 述重建准备信息。
3、根据权利要求 1或 2所述的方法， 其特征在于， 所述方法还包括： 接收所述终端发送的 RRC连接重建请求消息；
根据所述 RRC连接重建请求消息以及所述终端发起所述 RRC连接 重建请求消息的小区标识符 ID对所述终端进行鉴权；
鉴权通过后， 选择所述终端发起所述 RRC连接重建请求消息的辅基 站下的小区标识符 ID对应的密钥作为与所述终端通信的密钥。
4、 根据权利要求 3所述的方法， 其特征在于， 所述方法还包括： 向所述主基站发送第三消息， 所述第三消息用于请求所述主基站转 发数据；
接收所述主基站发送的第三消息响应消息并保存所述主基站转发来 的包数据汇聚协议 PDCP 数据包， 其中所述第三消息响应消息包括： 携 带上下行 PDCP序号和超帧数 HFN状态信息；
向所述终端发送 RRC连接重建消息， 所述 RRC连接重建消息用于 响应所述 RRC连接重建请求消息。
5、 一种 RRC连接重建方法， 其特征在于， 包括： 接收终端发送的 RRC连接重建请求消息； 向主基站发送第三消息， 所述第三消息用于请求所述主基站转发数 据；
接收所述主基站发送的第三消息响应消息并保存所述主基站转发来 的包数据汇聚协议 PDCP 数据包， 其中所述第三消息响应消息包括： 携 带上下行 PDCP序号和超帧数 HFN状态信息；
向所述终端发送 RRC连接重建消息， 所述 RRC连接重建消息用于 响应所述 RRC连接重建请求消息。
6、 一种 RRC连接重建方法， 其特征在于， 包括： 发送第一消息至辅基站， 所述第一消息用于给终端增加辅基站并且 携带重建准备信息， 所述重建准备信息包括下面一项或任意项的组合： 主基站对应的主小区标识符 ID、 终端在所述主小区上的无线网络临时标 识、 辅基站下一个或多个小区对应的密钥和短完整性消息鉴权码、 承载 信息；
接收所述辅基站发送的第一消息响应消息。
7、 根据权利要求 6所述的方法， 其特征在于， 所述方法还包括： 向所述辅基站发送第二消息， 所述第二消息用于更新所述重建准备 信息。
8、根据权利要求 6或 7所述的方法， 其特征在于， 所述方法还包括： 接收所述辅基站发送的第三消息， 所述第三消息用于请求主基站转 发数据；
根据所述第三消息向所述辅基站发送第三消息响应消息及包数据汇 聚协议 PDCP数据包，其中所述第三消息响应消息包括：携带上下行 PDCP 序号和超帧数 H FN状态信息。
9、 一种辅基站， 其特征在于， 包括：
第一请求接收单元， 用于接收主基站发送的第一消息， 所述第一消 息用于给终端增加辅基站并且携带重建准备信息， 所述重建准备信息包 括下面一项或任意项的组合： 主基站对应的主小区标识符 ID、 终端在所 述主小区上的无线网络临时标识、 辅基站下一个或多个小区对应的密钥 和短完整性消息鉴权码、 承载信息； 第一响应发送单元， 用于保存所述重建准备信息并返回第一消息响 应消息至所述主基站。
10、 根据权利要求 9 所述的辅基站， 其特征在于， 所述辅基站还包 括：
更新消息接收单元， 用于接收所述主基站发送的第二消息并保存， 所述第二消息用于更新所述重建准备信息。
11、 根据权利要求 9或 10所述的辅基站， 其特征在于， 所述辅基站 还包括： 第一消息发送单元， 用于接收所述终端发送的 RRC连接重建请求消 息；
第一消息处理单元， 用于根据所述 RRC连接重建请求消息以及所述 终端发起所述 RRC连接重建请求消息的小区标识符 ID对所述终端进行 鉴权；
第一鉴权管理单元， 用于鉴权通过后， 选择所述终端发起所述 RRC 连接重建请求消息的辅基站下对应的小区标识符 ID对应的密钥作为与所 述终端通信的密钥。
12、 根据权利要求 11所述的辅基站， 其特征在于， 所述辅基站还包 括： 第一请求发送单元， 用于向所述主基站发送第三消息， 所述第三消 息用于请求所述主基站转发数据；
第一响应接收单元， 用于接收所述主基站发送的第三消息响应消息 并保存所述主基站转发来的包数据汇聚协议 PDCP 数据包， 其中所述第 三消息响应消息包括： 携带上下行 PDCP序号和超帧数 HFN状态信息； 所述第一响应发送单元还用于向所述终端发送 RRC连接重建消息， 所述 RRC连接重建消息用于响应所述 RRC连接重建请求消息。
13、 一种辅基站， 其特征在于， 包括： 第二消息发送单元， 用于接收终端发送的 RRC连接重建请求消息； 第二请求发送单元， 用于向主基站发送第三消息， 所述第三消息用 于请求所述主基站转发数据；
第二响应接收单元， 用于接收所述主基站发送的第三消息响应消息 并保存所述主基站转发来的包数据汇聚协议 PDCP 数据包， 其中所述第 三消息响应消息包括： 携带上下行 PDCP序号和超帧数 HFN状态信息； 第二响应发送单元， 用于向所述终端发送 RRC连接重建消息， 所述 RRC连接重建消息用于响应所述 RRC连接重建请求消息。
14、 一种主基站， 其特征在于， 包括：
第三请求发送单元， 用于发送第一消息至辅基站， 所述第一消息用 于给终端增加辅基站并且携带重建准备信息， 所述重建准备信息包括下 面一项或任意项的组合： 主基站对应的主小区标识符 ID、 终端在所述主 小区上的无线网络临时标识、 辅基站下一个或多个小区对应的密钥和短 完整性消息鉴权码、 承载信息；
第三响应接收单元， 用于接收辅基站发送的第一消息响应消息。
15、 根据权利要求 14所述的主基站， 其特征在于， 所述主基站还包 括：
更新消息发送单元， 用于向辅基站发送第二消息， 所述第二消息用 于更新所述重建准备信息。
16、 根据权利要求 14或 15所述的主基站， 其特征在于，
第三请求接收单元， 用于接收所述辅基站发送的第三消息， 所述第 三消息用于请求所述主基站转发数据；
第三响应发送单元， 用于根据所述第三消息向所述辅基站发送第三 消息响应消息及包数据汇聚协议 PDCP 数据包， 其中所述第三消息响应 消息包括： 携带上下行 PDCP序号和超帧数 HFN状态信息。
17、 一种辅基站， 其特征在于， 包括第一存储器和通过数据总线与 所述第一存储器连接的第一处理器， 以及分别与所述第一存储器和所述 第一处理器连接的至少一个第一入口端及至少一个第一出口端， 其中： 所述第一处理器用于通过所述至少一个第一入口端接收主基站发送 的第一消息， 所述第一消息用于给终端增加辅基站并且携带重建准备信 息， 所述重建准备信息包括下面一项或任意项的组合： 主基站对应的主 小区标识符 ID、 终端在所述主小区上的无线网络临时标识、 辅基站下一 个或多个小区对应的密钥和短完整性消息鉴权码、 承载信息； 所述第一存储器用于保存所述重建准备信息并通过所述至少一个第 一出口端返回第一消息响应消息至所述主基站。
18、 根据权利要求 17所述的辅基站， 其特征在于，
所述第一处理器还用于通过所述至少一个第一入口端接收所述主基 站发送的第二消息并通过所述第一存储器保存， 所述第二消息用于更新 所述重建准备信息。
19、 根据权利要求 17或 18所述的辅基站， 其特征在于，
所述第一处理器还用于通过所述至少一个第一入口端接收所述终端 发送的 RRC连接重建请求消息；根据所述 RRC连接重建请求消息以及所 述终端发起所述 RRC连接重建请求消息的小区标识符 ID在所述第一存 储器中对所述终端进行鉴权； 所述第一处理器还用于鉴权通过后 , 选择所述终端发起所述 RRC连 接重建请求消息的辅基站下对应的小区标识符 ID对应的密钥作为与所述 终端通信的密钥。
20、 根据权利要求 19所述的辅基站， 其特征在于，
所述第一处理器还用于通过所述至少一个第一出口端向所述主基站 发送第三消息， 所述第三消息用于请求所述主基站转发数据； 通过所述 至少一个第一入口端接收所述主基站发送的第三消息响应消息并通过所 述第一存储器保存所述主基站转发来的包数据汇聚协议 PDCP 数据包， 其中所述第三消息响应消息包括： 携带上下行 PDCP序号和超帧数 HFN 状态信息； 通过所述至少一个第二出口端向所述终端发送 RRC连接重建 消息， 所述 RRC连接重建消息用于响应所述 RRC连接重建请求消息。
21、 一种辅基站， 其特征在于， 包括第二存储器和通过数据总线与 所述第二存储器连接的第二处理器， 以及分别与所述第二存储器和所述 第二处理器连接的至少一个第二入口端及至少一个第二出口端， 其中： 所述第二处理器， 用于通过所述至少一个第二入口端接收终端发送 的 RRC连接重建请求消息；
所述第二处理器， 还用于通过所述至少一个第二出口端向主基站发 送第三消息， 所述第三消息用于请求所述主基站转发数据； 通过所述至 少一个第二入口端接收所述主基站发送的第三消息响应消息并通过所述 第二存储器保存所述主基站转发来的包数据汇聚协议 PDCP 数据包， 其 中所述第三消息响应消息包括： 携带上下行 PDCP序号和超帧数 HFN状 态信息； 通过所述至少一个第二出口端向所述终端发送 RRC连接重建消 息， 所述 RRC连接重建消息用于响应所述 RRC连接重建请求消息。
22、 一种主基站， 其特征在于， 包括第三存储器和通过数据总线与 所述第三存储器连接的第三处理器， 以及分别与所述第三存储器和所述 第三处理器连接的至少一个第三入口端及至少一个第三出口端， 其中： 所述第三处理器用于通过所述至少一个第三出口端发送第一消息至 辅基站， 所述第一消息用于给终端增加辅基站并且携带重建准备信息， 所述重建准备信息包括下面一项或任意项的组合： 主基站对应的主小区 标识符 ID、 终端在所述主小区上的无线网络临时标识、 辅基站下一个或 多个小区对应的密钥和短完整性消息鉴权码、 承载信息； 通过所述至少 一个第三入口端接收所述辅基站发送的所述第一消息响应消息。
23、 根据权利要求 22所述的主基站， 其特征在于， 所述第三处理器 还用于通过所述至少一个第三出口端向所述辅基站发送第二消息， 所述 第二消息用于更新所述重建准备信息。
24、 根据权利要求 22或 23 所述的主基站， 其特征在于， 所述第三 处理器还用于通过所述至少一个第三入口端接收所述辅基站发送的第三 消息， 所述第三消息用于请求所述主基站转发数据； 根据所述第三消息 通过所述至少一个第三出口端向所述辅基站发送第三消息响应消息及所 述第三存储器中的包数据汇聚协议 PDCP 数据包， 其中所述第三消息响 应消息包括： 携带上下行 PDCP序号和超帧数 HFN状态信息。
25、 一种网络系统， 其特征在于， 包括： 主基站、 辅基站和终端， 所述主基站为权利要求 14〜16 所述的任一主基站， 所述辅基站为权利要 求 10〜13所述的任一辅基站； 或， 所述主基站为权利要求 22〜24 所述的任一主基站， 所述辅基站 为权利要求 17〜21所述的任一辅基站。
26、 根据权利要求 25所述的网络系统， 其特征在于， 所述终端用于 向服务小区所在的频段或服务小区对应的辅基站发起 RRC连接重建请求 消息。
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