WO2016176952A1 - 一种实现蜂窝网络重定位的方法和基站 - Google Patents

一种实现蜂窝网络重定位的方法和基站 Download PDF

Info

Publication number
WO2016176952A1
WO2016176952A1 PCT/CN2015/090283 CN2015090283W WO2016176952A1 WO 2016176952 A1 WO2016176952 A1 WO 2016176952A1 CN 2015090283 W CN2015090283 W CN 2015090283W WO 2016176952 A1 WO2016176952 A1 WO 2016176952A1
Authority
WO
WIPO (PCT)
Prior art keywords
base station
user plane
relocation
plane function
primary
Prior art date
Application number
PCT/CN2015/090283
Other languages
English (en)
French (fr)
Inventor
杜忠达
Original Assignee
中兴通讯股份有限公司
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 中兴通讯股份有限公司 filed Critical 中兴通讯股份有限公司
Priority to EP15891203.0A priority Critical patent/EP3294003B1/en
Priority to EP20175013.0A priority patent/EP3720186A1/en
Priority to US15/572,309 priority patent/US10582431B2/en
Priority to ES15891203T priority patent/ES2807792T3/es
Publication of WO2016176952A1 publication Critical patent/WO2016176952A1/zh

Links

Images

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/08—Reselecting an access point
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0011—Control or signalling for completing the hand-off for data sessions of end-to-end connection
    • H04W36/0033—Control or signalling for completing the hand-off for data sessions of end-to-end connection with transfer of context information
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/16—Performing reselection for specific purposes
    • H04W36/18—Performing reselection for specific purposes for allowing seamless reselection, e.g. soft reselection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/0005—Control or signalling for completing the hand-off
    • H04W36/0055—Transmission or use of information for re-establishing the radio link
    • H04W36/0069—Transmission or use of information for re-establishing the radio link in case of dual connectivity, e.g. decoupled uplink/downlink
    • H04W36/00692—Transmission 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]

Definitions

  • This document relates to the field of cellular network positioning technologies, and in particular, to a method and a base station for implementing cellular network relocation.
  • a mobile terminal supporting soft handoff first needs to support the ability to maintain a wireless connection with at least two cells. Before a soft handover occurs, the network can first connect the mobile terminal to the target cell. The network then notifies the mobile terminal to switch to this target cell. When switching to the target cell, the mobile terminal may be required to disconnect from the source target cell at the same time, or may choose to maintain the wireless connection. Because the wireless interface communication is always maintained during this process, theoretically no user interface interruption time will occur.
  • this type of switching is called “soft switching.” If the source serving cell and the target cell are within one base station, then this switching is referred to as “softer handoff.” This is because the message exchange between the source cell and the target cell and the forwarding process of the data packet are omitted, so the handover process is more rapid.
  • microcells Long Term Evolution
  • 3GPP developed the LTE (Long Term Evolution) system
  • LTE Long Term Evolution
  • microcells were used in engineering in order to improve spectrum efficiency.
  • This microcell and macrocell ratio There are two significant differences, one is the use of relatively high spectrum resources, such as 2.4GHz, one is its coverage is significantly reduced, probably only one-tenth of the macrocell.
  • the main role of these micro-cells is to absorb the uplink and downlink traffic of the mobile terminal. Therefore, in general, these microcells and macrocells have geographically overlapping coverage areas, that is, the microcells are generally within the coverage of the macrocell.
  • the mobile terminal moves between macro cells, it will pass through a considerable number of micro cells. If the switching technology is also adopted through the microcell, it will cause the user's face to be interrupted.
  • CA Carrier aggregation
  • DC dual connectivity
  • the terminal Since the terminal is always connected to the macro cell as the primary cell (pcell), the addition and deletion of the scell does not introduce a user plane interruption, but may cause traffic fluctuations of the air interface service.
  • the prerequisite for configuring a CA is that all component carriers (CCs) are controlled by a scheduler. And when CCs are distributed across different sites, these sites are connected by an ideal backhaul. When for some reasons, such as cost, the backhaul between base stations is not ideal, DC technology is needed. After configuring DC.
  • the terminal can be configured with three bearer modes, namely, MCG (primary cell group) bearer, SCG (secondary cell group) bearer and forked bearer.
  • MCG bearer refers to a radio bearer that is separately configured on the primary base station (eNB).
  • An SCG bearer refers to a bearer that is separately configured on a secondary base station (SeNB).
  • a split bearer refers to a radio bearer that is commonly configured by an eNB and an SeNB. When the terminal crosses the coverage of the SeNB, a process of SeNB addition, deletion, or SeNB change may occur.
  • For the split bearer there is an effect similar to that carried under the CA, that is, no user plane interruption occurs, but traffic fluctuations occur. But for SCG bearers, it will produce a similar hard-switching effect.
  • the user plane data of the 3GPP system requires encryption and decryption procedures on the radio interface. If it is wireless RRC (Radio Resource Control) signaling, an integrity protection process is also required.
  • RRC Radio Resource Control
  • the security-related configuration and calculation are implemented above the MAC (Media Access Control) protocol layer and in the RNC (Radio Network Controller).
  • the security-related configuration and calculation are implemented in the PDCP (Packet Data Convergence Protocol) layer.
  • the technical problem to be solved by the present invention is to provide a method and a base station for realizing cellular network relocation, which can solve the problem of frequent user interruption in a high-density microcellular network.
  • a method for implementing cellular network relocation, applied to a relocated source base station comprising:
  • the source base station sends, to the target base station, the relocation request message, where the target base station performs the primary user plane function, where the relocation request message carries the context information of the terminal on the source base station;
  • the source base station After receiving the relocation request acknowledgement message returned by the target base station to confirm that the target base station is the relocated primary base station, the source base station sends the context information of the primary user plane function on the source base station. Giving the target base station and stopping the execution of the primary user plane function; wherein the relocation request acknowledgement message carries a user plane address of the data packet received by the target base station after relocation.
  • the source base station is a user plane primary base station, and the target base station is a secondary base station;
  • the secondary user plane function of the secondary base station remains in the relocation process; if the source base station includes the secondary user plane function, the secondary user plane function of the source base station remains executed during the relocation process.
  • the primary user plane function includes: reordering data packets processed by the secondary user plane function from the terminal; and for the downlink radio bearer, the primary user plane function includes: The data packets of the upper layer are numbered;
  • the secondary user plane function includes one or more of the following functions: security function, radio link control RLC protocol stack function, media access control MAC protocol stack function, and physical layer PHY protocol stack function.
  • the context information of the primary user plane function sent by the source base station to the target base station includes: the primary user plane function reorders the data packet Text information
  • the context information of the primary user plane function sent by the source base station to the target base station includes: context information in which the primary user plane function numbers the data packet.
  • the context information of the terminal on the source base station includes at least one of the following information:
  • the method further includes: sending a relocation notification message to the other secondary base stations except the target base station, where The relocation notification message is used to notify the primary base station to relocate from the source base station to the target base station, where the relocation notification message carries a user plane address of the data packet received by the target base station.
  • the method further includes:
  • the method further includes:
  • the data packet of the base station is buffered locally and processed by the secondary user plane function on the source base station, and then sent to the terminal.
  • the context information of the terminal carried in the relocation request message sent by the source base station to the target base station further includes: the terminal is located on the source base station. Configuration information of the secondary user plane function.
  • the method further includes:
  • the source base station initiates a radio resource control RRC reconfiguration procedure with the terminal, for example, if the control plane primary base station before the relocation starts is another base station, The source base station notifies the other base station to initiate a radio resource control RRC reconfiguration procedure with the terminal;
  • the terminal is notified that the user plane primary base station relocates from the source base station to the target base station, and sends configuration information of the secondary user plane function of the target base station to The terminal.
  • a method for implementing relocation of a cellular network, applied to a target base station for relocation comprising:
  • the target base station After receiving the relocation request message sent by the source base station to indicate that the target base station performs the primary user plane function, the target base station returns, to the source base station, a primary base station that is used to confirm that the target base station is relocated.
  • a relocation request acknowledgement message where the relocation request acknowledgement message carries a user plane address of the data packet received by the target base station after relocation; and the relocation request message carries a context of the terminal on the source base station information;
  • the target base station After receiving the context information of the primary user plane function sent by the source base station, the target base station performs a primary user plane function.
  • the source base station is a user plane primary base station, and the target base station is a secondary base station;
  • the secondary user plane function of the secondary base station remains in the relocation process; if the source base station includes the secondary user plane function, the secondary user plane function of the source base station remains executed during the relocation process.
  • the primary user plane function includes: reordering data packets processed by the secondary user plane function from the terminal; and for the downlink radio bearer, the primary user plane function includes: The data packets of the upper layer are numbered;
  • the secondary user plane function includes one or more of the following functions: security function, radio link control RLC protocol stack function, media access control MAC protocol stack function, and physical layer PHY protocol stack function.
  • the context information of the primary user plane function sent by the source base station to the target base station includes: the primary user plane function reorders the data packet Text information
  • the context information of the primary user plane function sent by the source base station to the target base station includes: context information in which the primary user plane function numbers the data packet.
  • the context information of the terminal on the source base station includes at least one of the following information: configuration information of the primary user plane function, capability information of the terminal, address information of the upper layer network control plane and the user plane, and upper layer network sending.
  • the bearer configuration information of the source base station and the user plane address of the secondary base station receiving the data packet after the relocation.
  • the method further includes: caching the data packet that has been processed by the target base station locally, for the uplink radio bearer. And/or receive data packets processed by other base station secondary user plane functions.
  • the step of performing the primary user plane function includes:
  • the uplink radio bearer After receiving the context information of the primary user plane function sent by the source base station, the uplink radio bearer reorders the data packet according to the reordering context, and sequentially sends the data packet to the upper layer network; and/or,
  • the data packet After receiving the context information of the primary user plane function sent by the source base station, the data packet is numbered, and the numbered data packet is sent to the user plane address of the base station including the secondary user plane function.
  • the method further includes:
  • the target base station After the retargeting control plane primary base station is the target base station, after the target base station returns to the source base station, the step of confirming the relocation request acknowledgement message of the primary base station after the base station is relocated, the The target base station further initiates a route switching procedure for notifying the upper layer network to switch the route to the target base station;
  • the target base station After the re-located control plane primary base station is another base station, after the target base station returns to the source base station, the step of confirming the relocation request acknowledgement message of the primary base station after the base station is relocated, the target base station The other base station is also notified to initiate a route switching procedure for informing the upper layer network to switch the route to the target base station.
  • a base station for implementing cellular network relocation comprising a request module and a response receiving and processing module, wherein:
  • the requesting module is configured to: send, to the target base station that is relocated, a relocation request message that is used to indicate that the target base station performs a primary user plane function, where the relocation request message carries the terminal on the source base station Contextual information;
  • the response receiving and processing module is configured to: after receiving the relocation request acknowledgement message returned by the target base station for confirming that the target base station is the relocated primary base station, the context of the primary user plane function on the base station The information is sent to the target base station, and the execution of the primary user plane function is stopped.
  • the relocation request acknowledgement message carries the user plane address of the data packet received by the target base station after relocation.
  • the source base station is a user plane primary base station, and the target base station is a secondary base station;
  • the secondary user plane function of the secondary base station remains in the relocation process; if the source base station includes the secondary user plane function, the secondary user plane function of the source base station remains executed during the relocation process.
  • the primary user plane function includes: reordering data packets processed by the secondary user plane function from the terminal; and for the downlink radio bearer, the primary user plane function includes: The data packets of the upper layer are numbered;
  • the secondary user plane function includes one or more of the following functions: security function, radio link control RLC protocol stack function, media access control MAC protocol stack function, and physical layer PHY protocol stack function.
  • the context information of the primary user plane function sent by the source base station to the target base station includes: context information that the primary user plane function reorders the data packet;
  • the context information of the primary user plane function sent by the source base station to the target base station includes: context information in which the primary user plane function numbers the data packet.
  • the context information of the terminal on the source base station includes at least one of the following information:
  • the response receiving and processing module is further configured to, after receiving the relocation request acknowledgement message sent by the target base station, send a relocation notification message to the other secondary base station, where the relocation is performed.
  • the notification message is used to notify the primary base station to relocate from the source base station to the target base station, where the relocation notification message carries the user plane address of the data packet received by the target base station.
  • the response receiving and processing module is further configured to: after transmitting the context information of the primary user plane function on the local base station to the target base station for the uplink radio bearer, processing the secondary user plane function of the base station
  • the data packet and/or the received data packet processed by the other secondary base station are sent to the target base station; and/or, for the downlink radio bearer, the context information of the primary user plane function on the base station is sent to the target
  • the data packet from the upper layer network that has not passed the primary user plane function number is sent to the target base station; and/or will be from the upper layer network and passed the primary user plane function number but has not been sent to the secondary base station.
  • the data packets of other secondary base stations are buffered locally and processed by the secondary user plane function on the base station, and then sent to the terminal.
  • the context information of the terminal carried in the relocation request message sent by the source base station to the target base station further includes: the terminal is located on the source base station.
  • Configuration information of the secondary user plane function if the target base station is a newly added base station, the context information of the terminal carried in the relocation request message sent by the source base station to the target base station, further includes: the terminal is located on the source base station. Configuration information of the secondary user plane function.
  • the response receiving and processing module is further configured to:
  • the target base station is a newly added base station, after receiving the relocation request acknowledgement message sent by the target base station,
  • the radio resource control RRC reconfiguration procedure between the terminal and the terminal is initiated. If the control plane primary base station before the relocation starts is another base station, the other base station is notified to initiate. Radio resource control RRC reconfiguration procedure with the terminal;
  • the terminal is notified that the user plane primary base station relocates from the source base station to the target base station, and sends configuration information of the secondary user plane function of the target base station to The terminal.
  • a base station for implementing cellular network relocation comprising a request receiving and processing module and a relocation executing module, wherein:
  • the request receiving and processing module is configured to: after receiving a relocation request message sent by the source base station to instruct the target base station to perform a primary user plane function, returning to the source base station to confirm that the base station is relocated a relocation request acknowledgement message of the primary base station; wherein the relocation request acknowledgement message carries a user plane address of the base station that receives the data packet after relocation; and the relocation request message carries the terminal on the source base station Contextual information;
  • the relocation execution module is configured to: after receiving the context information of the primary user plane function sent by the source base station, perform the primary user plane function.
  • the source base station is a user plane primary base station, and the target base station is a secondary base station;
  • the secondary user plane function of the secondary base station remains in the relocation process; if the source base station includes the secondary user plane function, the secondary user plane function of the source base station remains executed during the relocation process.
  • the primary user plane function includes: reordering data packets processed by the secondary user plane function from the terminal; and for the downlink radio bearer, the primary user plane function includes: The data packets of the upper layer are numbered;
  • the secondary user plane function includes one or more of the following functions: security function, radio link control RLC protocol stack function, media access control MAC protocol stack function, and physical layer PHY protocol stack function.
  • the context information of the primary user plane function sent by the source base station to the target base station includes: context information that the primary user plane function reorders the data packet;
  • the context information of the primary user plane function sent by the source base station to the target base station includes: context information in which the primary user plane function numbers the data packet.
  • the context information of the terminal on the source base station includes at least one of the following information:
  • the configuration information of the primary user plane function, the capability information of the terminal, the address information of the upper network control plane and the user plane, the bearer configuration information sent by the upper layer network to the source base station, and the secondary base station after the relocation The user plane address of the received packet.
  • the request receiving and processing module is further configured to: after returning the relocation request acknowledgement message to the source base station, buffer the data packet that has been processed by the base station locally for the uplink radio bearer; and / or receive data packets processed by other base station secondary user plane functions.
  • the relocation performing module is configured to perform the primary user plane function as follows:
  • the uplink radio bearer After receiving the context information of the primary user plane function sent by the source base station, the uplink radio bearer reorders the data packet according to the reordering context, and sequentially sends the data packet to the upper layer network; and/or,
  • the data packet After receiving the context information of the primary user plane function sent by the source base station, the data packet is numbered, and the numbered data packet is sent to the user plane address of the base station including the secondary user plane function.
  • the base station further includes a route switching processing module, where:
  • the route switching processing module is configured to: after the relocated primary control base station is the local base station, after returning a relocation request acknowledgement message to the source base station for confirming that the base station is the relocated primary base station, Initiating a route switching procedure for informing the upper-layer network to switch the route to the target base station; if the re-located control plane primary base station is another base station, returning to the source base station to confirm that the base station is relocated After the relocation request acknowledgement message of the primary base station, the other base station is notified to initiate a route switching procedure for notifying the upper layer network to switch the route to the target base station.
  • the technical solution provided by the present invention provides a method and a base station for implementing cellular network relocation, where a relocated source base station notifies a retargeted target base station to perform a primary user plane function, and the source base station receives the After the acknowledgment message fed back by the target base station, the function of the primary user plane on the base station is stopped, and the context information of the primary user plane function is sent to the target base station, and the target base station performs the primary user plane after receiving the context information of the primary user plane function.
  • the primary user plane function includes: a function of numbering data packets received from an upper layer network in a downlink direction, and reordering data packets from the terminal in an uplink direction; the secondary user plane function includes: The received data packet is decrypted and the data packet is encrypted in the downstream direction.
  • the auxiliary user plane function on the radio interface of each base station keeps executing, that is, no protocol stack reset operation occurs, and key configuration parameters (such as security-related encryption/decryption parameters) are No change has taken place. Therefore, the terminal in the technical solution of the present invention does not cause user plane interruption when moving in the high-density micro-cellular network, and the relocation function of the primary base station of the technical solution of the present invention is a non-destructive seamless process.
  • FIG. 1 is a protocol stack of a downlink according to an embodiment of the present invention.
  • 2 is a protocol stack of an uplink according to an embodiment of the present invention.
  • FIG. 3 is a flowchart of a method for implementing cellular network relocation (including a source base station and a target base station) according to an embodiment of the present invention.
  • FIG. 4 is a flowchart (source base station) of a method for implementing cellular network relocation according to an embodiment of the present invention.
  • FIG. 5 is a flowchart (target base station) of a method for implementing cellular network relocation according to an embodiment of the present invention.
  • FIG. 6 is a schematic structural diagram of a source base station for implementing cell network relocation according to an embodiment of the present invention.
  • FIG. 7 is a schematic structural diagram of a target base station for implementing cellular network relocation according to an embodiment of the present invention.
  • FIG. 8 is a schematic diagram of information interaction of a downlink according to Embodiment 1 of the present invention.
  • FIG. 9 is a schematic diagram of information exchange of an uplink according to Embodiment 2 of the present invention.
  • FIG. 10 is a schematic diagram of information interaction according to Embodiment 3 of the present invention (the target base station is a new secondary base station).
  • FIG. 11 is a schematic diagram of information interaction of a downlink according to Embodiment 5 of the present invention.
  • FIG. 12 is a schematic diagram of information interaction of an uplink according to Embodiment 6 of the present invention.
  • FIG. 13 is a schematic diagram of information interaction (including uplink and downlink) according to Embodiment 7 of the present invention.
  • FIG. 14 is a schematic diagram of a base station relocation according to Embodiment 8 of the present invention.
  • FIG. 15 is a schematic diagram of another base station relocation according to Embodiment 9 of the present invention.
  • FIG. 16 is a schematic diagram of another base station relocation according to Embodiment 10 of the present invention.
  • FIG. 17 is a schematic diagram of information interaction according to Embodiment 10 of the present invention.
  • the user plane function of a radio bearer is composed of two parts, namely, a main user plane function and a secondary user plane function.
  • the terminal configured with the radio bearer and the two or more base stations have a wireless connection.
  • the base station that includes at least the primary user plane function is called the user plane primary base station, and one radio bearer has only one user plane primary base station; other base stations that only include the secondary user plane function are called secondary base stations.
  • the user plane master base station is used to receive upper layer data, usually an IP data packet, or send the received data packet to the upper layer network. That is to say, the user plane primary base station is an anchor point of a radio bearer established on the terminal.
  • the module that completes the main user plane function on the user plane main base station is called the main user plane module.
  • the module that completes the secondary user plane function on the secondary base station and the user plane primary base station is called a secondary user plane module.
  • the control plane performs the control plane signaling interaction between the primary base station and the upper layer network and the terminal, and is used to control the establishment process of the radio bearer and the relocation process of the primary base station according to the embodiment of the present invention. All radio bearers share the same control plane primary base station.
  • the user plane master base stations of different radio bearers may be on different base stations or on the same base station.
  • the control plane primary base station and the user plane primary base station may be on different base stations or on the same base station.
  • the relocation of the primary base station refers to the relocation of the primary base station of the user plane.
  • the primary base station relocation also includes relocation of the control plane primary base station. .
  • the primary base station refers to the user plane primary base station.
  • the upper layer network sends the IP packet to the primary base station, and the primary user plane module of the primary base station processes the IP packet (for example, numbering) to obtain the PDU (herein referred to as DMPDU) and transmits it to the secondary user plane of the base station and the secondary base station.
  • the module, the secondary user plane module of the primary base station processes (for example, encrypts) the DMPDU to obtain a PDU (CPDU), and sends the PDU (CPDU) to the terminal, and the secondary user plane module of the secondary base station processes (for example, encrypts) the obtained PDU (CPDU) to the PDU. terminal.
  • the terminal processes (for example, decrypts) the CPDUs from the primary base station and the secondary base station to obtain the DMPDU, and then reorders the DMPDUs and transmits them to the upper layer.
  • the terminal numbers the IP packets to obtain PDUs (herein referred to as UPDUs), and then performs further processing (for example, encryption) on the UPDUs to obtain CPDUs, and sends the CPDUs to the primary base station and the secondary base station.
  • the secondary user plane module of the primary base station processes (for example, decrypts) the CPDU to obtain the UPDU
  • the secondary user plane module of the secondary base station processes (for example, decrypts) the CPDU to obtain the UPDU and sends the UPDU to the primary base station
  • the primary user plane module of the primary base station The UPDUs from the base station and the secondary base station are reordered and then transmitted to the upper layer network.
  • the main user plane function includes at least the function of the upper layer data number.
  • the main user plane function can include a header compression function.
  • the main user plane function includes at least the function of reordering and sequentially delivering data packets to the upper layer.
  • the secondary user plane function includes at least security functions including, but not limited to, the Ciphering function (as the sender) and the Deciphering function (as the receiver).
  • the secondary user plane function may also include an RLC protocol stack function, a MAC protocol stack function, and a PHY (Physical Layer Protocol) protocol stack function.
  • the downlink protocol stack is shown in Figure 1.
  • the primary user plane function is SN allocation, which is the sequence number assignment function.
  • the secondary user plane function refers to the Ciphering and RLC/MAC/PHY protocol stack functions.
  • the execution functions of the RLC/MAC/PHY of the primary base station and the secondary base station in FIG. 1 are the same. Their configuration parameters can be the same or different.
  • the matching between the primary base station and the secondary base station in the Ciphering Setting parameters, such as keys, is different, and the processing function for DRB (Data Radio Bearer) is the same.
  • DRB Data Radio Bearer
  • the receiver On the terminal side, in addition to the functions of Deciphering/RLC/MAC/PHY, the receiver also includes the reordering function and the in order delivery and duplication detection functions.
  • the Reordering function means that after receiving the PDUs of different base stations, the terminal needs to sort the PDUs in a reordering window, because the sequence of the PDUs received from different base stations cannot be guaranteed, even at any base station. The received PDUs are received in order.
  • the configuration parameters in Deciphering are consistent with the configuration parameters in the Ciphering of the corresponding base station, so that the decoding can be successfully performed.
  • the uplink protocol stack is shown in Figure 2. There is only one primary base station and multiple secondary base stations.
  • the primary user plane function refers to the reordering function and the in order delivery and duplication detection functions.
  • the secondary user plane function refers to the Deciphering function and the RLC/MAC/PHY protocol stack function.
  • the synchronization process of the HFN can be performed between the primary user plane and the secondary user plane to ensure that the decryption of the secondary user plane can be successfully completed.
  • HFN Hexaper Frame Number
  • an embodiment of the present invention provides a method for implementing cellular network relocation, where the method includes:
  • the source base station sends, to the target base station, the relocation request message, which is used by the target base station to perform the function of the primary user plane, where the relocation request message carries the context information of the terminal on the source base station.
  • the target base station After receiving the relocation request message, the target base station returns, to the source base station, a relocation request acknowledgement message, which is used to confirm that the primary base station is relocated, and the relocation request acknowledgement message carries the present
  • the target base station receives the user plane address of the data packet after relocation;
  • the source base station After receiving the relocation request acknowledgement message, the source base station sends a primary user plane on the base station.
  • the context information of the function is sent to the target base station, and the execution of the primary user plane function is stopped;
  • the target base station After receiving the context information of the primary user plane function sent by the source base station, the target base station performs a primary user plane function.
  • the method may also include the following features:
  • the source base station is a user plane primary base station, and the target base station is a secondary base station;
  • the secondary user plane function of the secondary base station remains in the relocation process; if the source base station includes the secondary user plane function, the secondary user plane function of the source base station remains executed during the relocation process. That is, the secondary user plane functions on the source base station, the target base station, and/or other secondary base stations are maintained during the relocation process, and the secondary user plane functions with security-related configuration parameters unchanged; that is, The secondary user plane function does not cause any reset operation of the protocol stack function;
  • the primary user plane function includes: reordering data packets processed by the secondary user plane function from the terminal; for the downlink radio bearer, the primary user plane function includes: The number of packets is numbered;
  • the secondary user plane function also includes one or more of the following functions: security function, radio link control RLC protocol stack function, media access control MAC protocol stack function, and physical layer PHY protocol stack function.
  • the target base station is a secondary base station that has been working before the relocation is initiated or is a newly added base station;
  • the context information of the terminal on the source base station includes at least one of the following information: configuration information of the primary user plane function, terminal capability (UE capability) information of the terminal, upper network control plane, and address information of the user plane, The bearer configuration information sent by the upper layer network to the source base station, and the user plane address of the secondary base station receiving the data packet after the relocation;
  • the secondary base station after the relocation includes: the source base station and/or other secondary base stations;
  • the method further includes: the target base station storing context information of the terminal received from the relocation request message;
  • the target base station After the target base station sends the relocation request acknowledgement message to the source base station, the target base station further includes: the target base station buffering the processed data packet locally;
  • the source base station receives the weight sent by the target base station After the location request acknowledgement message, the method further includes: the source base station sending a relocation notification message to the other secondary base station, where the relocation notification message is used to notify the primary base station to relocate from the source base station to the target base station, where the Decoding a user plane address of the data packet received by the target base station;
  • the method further includes: after receiving the relocation notification message sent by the source base station, the other secondary base station sends the processed data packet to the target base station;
  • the context information of the primary user plane function sent by the source base station to the target base station includes: context information that the primary user plane function reorders the data packet;
  • the source base station After the source base station sends the context information of the primary user plane function to the target base station, the source base station further includes:
  • the target base station After receiving the context information of the primary user plane function sent by the source base station, the target base station performs the primary user plane function, including:
  • the target base station reorders the data packets according to the reordering context, and sequentially sends the data packets to the upper layer network;
  • the context information of the primary user plane function sent by the source base station to the target base station includes:
  • the primary user plane function is context information for numbering the data packet
  • the context information of the primary user plane function for numbering the data packet includes: the first sequence number that the target base station can allocate for the data packet after the relocation, or the primary user plane function of the base station is allocated for the data packet.
  • the last serial number includes: the first sequence number that the target base station can allocate for the data packet after the relocation, or the primary user plane function of the base station is allocated for the data packet. The last serial number;
  • the target base station After receiving the context information of the primary user plane function sent by the source base station, the target base station performs the primary user plane function, including:
  • Data packets are numbered, and the numbered data packets are sent to the user plane address of the source base station and/or other secondary base stations;
  • the source base station After the source base station sends the context information of the primary user plane function to the target base station, the source base station further includes:
  • the context information of the terminal carried in the relocation request message sent by the source base station to the target base station further includes: a secondary user of the terminal on the source base station Configuration information of the surface function;
  • the configuration information of the secondary user plane function of the terminal on the source base station includes: a key parameter
  • the relocation request acknowledgement message sent by the target base station to the source base station further includes: configuration information of a secondary user plane function of the target base station, where the target base station is a newly added base station;
  • the source base station after receiving the relocation request acknowledgement message sent by the target base station, further includes:
  • the source base station initiates a radio resource control RRC reconfiguration procedure with the terminal, for example, if the control plane primary base station before the relocation starts is another base station, The source base station notifies the other base station to initiate a radio resource control RRC reconfiguration procedure with the terminal;
  • the terminal is notified that the user plane primary base station relocates from the source base station to the target base station, and sends configuration information of the secondary user plane function of the target base station to The terminal;
  • the source base station further includes: the source base station notifying that the terminal itself is no longer a secondary base station; After receiving the notification, the terminal stops data communication with the source base station;
  • the target base station After the source base station is no longer the secondary base station after the relocation, the target base station, after completing the route switching process with the upper layer network, further includes: the target base station notifying the source base station to delete the Context information of the terminal;
  • the method further includes: the source base station transmitting, to the terminal, an RRC message for notifying the terminal primary base station to relocate from the source base station to the target base station;
  • the primary base station corresponding to the different radio bearers is the same or different; the primary base station corresponding to the user plane of the same bearer is the same as or different from the primary base station corresponding to the control plane;
  • an embodiment of the present invention provides a method for implementing relocation of a cellular network, which is applied to a source base station for relocation, and includes:
  • S10 Send, to the target base station that is relocated, a relocation request message that is used to indicate that the target base station performs a primary user plane function, where the relocation request message carries context information of the terminal on the source base station.
  • the method may also include the following features:
  • the source base station is a user plane primary base station, and the target base station is a secondary base station;
  • the secondary user plane function of the secondary base station remains in the relocation process; if the source base station includes the secondary user plane function, the secondary user plane function of the source base station remains executed during the relocation process;
  • the primary user plane function includes: reordering data packets processed by the secondary user plane function from the terminal; for the downlink radio bearer, the primary user plane function includes: The number of packets is numbered;
  • the secondary user plane function further includes one or more of the following functions: a security function, a radio link control RLC protocol stack function, a media access control MAC protocol stack function, and a physical layer PHY protocol stack function;
  • the security function for example, encrypts a data packet from an upper layer network for a downlink bearer, and decrypts a data packet from the terminal for an uplink radio bearer;
  • the context information of the terminal on the source base station includes at least one of the following information: The configuration information of the primary user plane function, the capability information of the terminal, the address information of the upper network control plane and the user plane, the bearer configuration information sent by the upper layer network to the source base station, and the user plane address of the secondary base station receiving the data packet after the relocation;
  • the method further includes: sending a relocation notification message to the other secondary base station, where the relocation notification message is used to notify the primary base station from the Recovering, by the source base station, the target base station, where the target base station carries a user plane address of the data packet;
  • the context information of the primary user plane function sent by the source base station to the target base station includes: context information that the primary user plane function reorders the data packet;
  • the context information of the primary user plane function sent by the source base station to the target base station includes: context information in which the primary user plane function numbers the data packet;
  • the context information of the primary user plane function for numbering the data packet includes: the first sequence number that the target base station can allocate for the data packet after the relocation, or the primary user plane function of the base station is allocated for the data packet.
  • the last serial number includes: the first sequence number that the target base station can allocate for the data packet after the relocation, or the primary user plane function of the base station is allocated for the data packet. The last serial number;
  • the uplink radio bearer further includes:
  • the downlink radio bearer further includes:
  • the context information of the terminal carried in the relocation request message sent by the source base station to the target base station further includes: the terminal is in the source Configuration information of the secondary user plane function on the base station;
  • the method further includes:
  • the source base station initiates a radio resource control RRC reconfiguration procedure with the terminal, for example, if the control plane primary base station before the relocation starts is another base station, The source base station notifies the other base station to initiate a radio resource control RRC reconfiguration procedure with the terminal;
  • the terminal is notified that the user plane primary base station relocates from the source base station to the target base station, and sends configuration information of the secondary user plane function of the target base station to The terminal;
  • the RRC reconfiguration process with the terminal further includes: notifying the terminal that the base station is no longer the secondary base station;
  • the method further includes: sending, to the terminal, an RRC message for notifying the terminal primary base station to relocate from the source base station to the target base station;
  • the primary base station corresponding to the different radio bearers is the same or different; the primary base station corresponding to the user plane of the same bearer is the same as or different from the primary base station corresponding to the control plane;
  • an embodiment of the present invention provides a method for implementing relocation of a cellular network, which is applied to a target base station for relocation, including:
  • the method may also include the following features:
  • the source base station is a user plane primary base station, and the target base station is a secondary base station;
  • the secondary user plane function of the secondary base station remains in the relocation process; if the source base station includes the secondary user plane function, the secondary user plane function of the source base station remains executed during the relocation process;
  • the target base station is a secondary base station that has been working before the relocation is initiated or is a newly added base station;
  • the primary user plane function includes: reordering data packets processed by the secondary user plane function from the terminal; for the downlink radio bearer, the primary user plane function includes: The number of packets is numbered;
  • the secondary user plane function further includes one or more of the following functions: a security function, a radio link control RLC protocol stack function, a media access control MAC protocol stack function, and a physical layer PHY protocol stack function;
  • the context information of the terminal on the source base station includes at least one of the following information: configuration information of the primary user plane function, capability information of the terminal, address information of the upper layer network control plane and the user plane, and the upper layer network sends the source information.
  • the secondary base station after the relocation includes: the source base station and/or other secondary base stations;
  • the method further includes: saving context information of the terminal received from the relocation request message;
  • the method further includes: buffering the data packet that has been processed by the local base station locally;
  • the uplink radio bearer further includes: receiving a data packet processed by the other base station auxiliary user plane function;
  • the context information of the primary user plane function sent by the source base station to the target base station includes: context information that the primary user plane function reorders the data packet;
  • the context information of the primary user plane function sent by the source base station to the target base station includes: the context information that the primary user plane function numbers the data packet interest;
  • the context information of the primary user plane function for numbering the data packet includes: the first sequence number that the target base station can allocate for the data packet after the relocation, or the primary user plane function of the base station is allocated for the data packet.
  • the last serial number includes: the first sequence number that the target base station can allocate for the data packet after the relocation, or the primary user plane function of the base station is allocated for the data packet. The last serial number;
  • performing the primary user plane function includes: after receiving the context information of the primary user plane function sent by the source base station, according to the uplink radio bearer, according to The reordering context reorders the data packets, and sequentially sends the data packets to the upper layer network; and/or, for the downlink radio bearers, after receiving the context information of the primary user plane function sent by the source base station, the data is The packet is numbered, and the numbered data packet is sent to the user plane address of the base station including the secondary user plane function;
  • the target base station further Initiating a route switching procedure for informing the upper layer network to switch the route to the target base station;
  • the target base station further notifies the other base station.
  • the base station initiates a route switching procedure for notifying the upper layer network to switch the route to the target base station.
  • the context information of the terminal carried in the relocation request message sent by the source base station to the target base station further includes: a secondary user of the terminal on the source base station Configuration information of the surface function;
  • the target base station After the source base station is no longer the secondary base station after the relocation, the target base station, after completing the route switching process with the upper layer network, further includes: the target base station notifying the source base station to delete the Context information of the terminal;
  • the primary base station corresponding to the different radio bearers is the same or different; the primary base station corresponding to the user plane of the same bearer is the same as or different from the primary base station corresponding to the control plane;
  • an embodiment of the present invention provides a source base station that implements relocation of a cellular network.
  • a source base station that implements relocation of a cellular network.
  • the requesting module 601 is configured to: send, to the target base station that is relocated, a relocation request message for instructing the target base station to perform a primary user plane function, where the relocation request message carries context information of the terminal on the source base station ;
  • the response receiving and processing module 602 is configured to: after receiving the relocation request acknowledgement message returned by the target base station for confirming that the target base station is the relocated primary base station, send the context information of the primary user plane function on the base station to the Determining the target base station, and stopping the execution of the primary user plane function; wherein the relocation request acknowledgement message carries the user plane address of the data packet received by the target base station after relocation;
  • the source base station may further include the following features:
  • the source base station is a user plane primary base station, and the target base station is a secondary base station;
  • the secondary user plane function of the secondary base station remains in the relocation process; if the source base station includes the secondary user plane function, the secondary user plane function of the source base station remains executed during the relocation process;
  • the primary user plane function includes: reordering data packets processed by the secondary user plane function from the terminal; for the downlink radio bearer, the primary user plane function includes: The number of packets is numbered;
  • the secondary user plane function further includes one or more of the following functions: a security function, a radio link control RLC protocol stack function, a media access control MAC protocol stack function, and a physical layer PHY protocol stack function;
  • the context information of the terminal on the source base station includes at least one of the following information: configuration information of the primary user plane function, capability information of the terminal, address information of the upper layer network control plane and the user plane, and the upper layer network sends the source information.
  • the response receiving and processing module 602 is configured to: after receiving the relocation request acknowledgement message sent by the target base station, the method further includes: sending a relocation notification message to the other secondary base station, where the relocation is performed The notification message is used to notify the primary base station to relocate from the source base station to the target base station, where the target base station carries the user plane address of the data packet;
  • the primary user plane sent by the source base station to the target base station for the uplink radio bearer The context information of the function includes: context information that the primary user plane function reorders the data packet;
  • the context information of the primary user plane function sent by the source base station to the target base station includes: context information in which the primary user plane function numbers the data packet;
  • the context information of the primary user plane function for numbering the data packet includes: the first sequence number that the target base station can allocate for the data packet after the relocation, or the primary user plane function of the base station is allocated for the data packet.
  • the last serial number includes: the first sequence number that the target base station can allocate for the data packet after the relocation, or the primary user plane function of the base station is allocated for the data packet. The last serial number;
  • the response receiving and processing module 602 is configured to: after the context information of the primary user plane function is sent to the target base station, the uplink radio bearer further includes:
  • the response receiving and processing module 602 is configured to: after the context information of the primary user plane function is sent to the target base station, the downlink radio bearer further includes:
  • the context information of the terminal carried in the relocation request message sent by the source base station to the target base station further includes: a secondary user of the terminal on the source base station Configuration information of the surface function;
  • the response receiving and processing module 602 is configured to: after receiving the relocation request acknowledgement message sent by the target base station, the method further includes:
  • control plane primary base station before the relocation starts is the source base station, initiate a radio resource control RRC reconfiguration procedure with the terminal, and if the control plane primary base station before the relocation starts is another base station, notify the other The base station initiates a radio resource control RRC reconfiguration procedure with the terminal;
  • the response receiving and processing module 602 is configured to: if the source base station is no longer a secondary base station after relocation, in the RRC reconfiguration process with the terminal, the method further includes: notifying the terminal that the base station is no longer a secondary base station ;
  • the response receiving and processing module 602 is configured to: after receiving the relocation request acknowledgement message sent by the target base station, the method further includes: sending, to the terminal, the terminal primary base station to notify the primary base station to relocate from the source base station to the RRC message of the target base station;
  • the primary base station corresponding to the different radio bearers is the same or different; the primary base station corresponding to the user plane of the same bearer is the same as or different from the primary base station corresponding to the control plane;
  • an embodiment of the present invention provides a target base station for implementing cellular network relocation, including:
  • the request receiving and processing module 701 is configured to: after receiving the relocation request message sent by the source base station to instruct the target base station to perform the primary user plane function, returning to the source base station to confirm that the base station is relocated a relocation request acknowledgement message of the primary base station; wherein the relocation request acknowledgement message carries a user plane address of the data packet received by the target base station after relocation; and the relocation request message carries the terminal at the source base station Context information on;
  • the relocation execution module 702 is configured to: after receiving the context information of the primary user plane function sent by the source base station, perform a primary user plane function;
  • the target base station may further include the following features:
  • the source base station is a user plane primary base station, and the target base station is a secondary base station;
  • the secondary user plane function of the secondary base station remains in the relocation process; if the source base station includes the secondary user plane function, the secondary user plane function of the source base station remains executed during the relocation process;
  • the target base station is a secondary base station that has been working before the relocation is initiated or is a newly added base station;
  • the primary user plane function includes: reordering data packets processed by the secondary user plane function from the terminal; and for the downlink wireless bearer, the primary user
  • the surface functions include: numbering packets from the upper layer network;
  • the secondary user plane function further includes one or more of the following functions: a security function, a radio link control RLC protocol stack function, a media access control MAC protocol stack function, and a physical layer PHY protocol stack function;
  • the context information of the terminal on the source base station includes at least one of the following information: configuration information of the primary user plane function, capability information of the terminal, address information of the upper layer network control plane and the user plane, and the upper layer network sends the source information.
  • the secondary base station after the relocation includes: the source base station and/or other secondary base stations;
  • the request receiving and processing module 701 is configured to: after receiving the relocation request message, further comprising: saving context information of the terminal received from the relocation request message;
  • the request receiving and processing module 701 is configured to: after transmitting the relocation request acknowledgement message to the source base station, for the uplink radio bearer, further comprising: buffering the data packet that has been processed by the local base station locally; and/or Receiving data packets processed by other secondary base station auxiliary user plane functions;
  • the context information of the primary user plane function sent by the source base station to the target base station includes: context information that the primary user plane function reorders the data packet;
  • the context information of the primary user plane function sent by the source base station to the target base station includes: context information in which the primary user plane function numbers the data packet;
  • the context information of the primary user plane function for numbering the data packet includes: the first sequence number that the target base station can allocate for the data packet after the relocation, or the primary user plane function of the base station is allocated for the data packet.
  • the last serial number includes: the first sequence number that the target base station can allocate for the data packet after the relocation, or the primary user plane function of the base station is allocated for the data packet. The last serial number;
  • the relocation execution module 702 is configured to: after receiving the context information of the primary user plane function sent by the source base station, perform the primary user plane function, including: receiving, for the uplink radio bearer, the primary sent by the source base station After the context information of the user plane function, the data packet is reordered according to the reordering context, and the data packet is sequentially sent to the upper layer network; and/or the primary user sent by the source base station is received for the downlink radio bearer. After the context information of the face function, the data packet is processed. Number, the numbered data packet is sent to the user plane address of the base station including the secondary user plane function;
  • the target base station further includes a route switching processing module.
  • the route switching processing module is configured to: if the primary base station of the control plane after the relocation is the target base station, return a relocation request acknowledgement message to the primary base station after confirming that the base station is relocated to the source base station Initiating a route switching procedure for informing the upper-layer network to switch the route to the target base station; if the re-located control plane primary base station is another base station, returning to the source base station to confirm that the base station is relocated After the relocation request acknowledgement message of the primary base station, the other base station is notified to initiate a route switching procedure for notifying the upper layer network to switch the route to the target base station.
  • the context information of the terminal carried in the relocation request message sent by the source base station to the target base station further includes: a secondary user of the terminal on the source base station Configuration information of the surface function;
  • the relocation execution module 702 is configured to: if the source base station is no longer a secondary base station after the relocation, the target base station further includes: the target after completing the route switching process with the upper layer network Notifying the source base station to delete context information of the terminal;
  • the primary base station corresponding to the different radio bearers is the same or different; the primary base station corresponding to the user plane of the same bearer is the same as or different from the primary base station corresponding to the control plane;
  • the S-eNB is the current primary base station and is also the relocated source base station.
  • the T-eNB is a current secondary base station and is also a target base station for relocation.
  • the DMPDU refers to the PDU after the primary user plane module processes (for example, the assigned sequence number); the CPDU refers to the PDU processed by the secondary user plane module (for example, encrypted); after the primary base station receives the IP packet from the upper layer network, the primary base station utilizes the primary user.
  • the polygon module allocates a sequence number for the IP packet to obtain a DMPDU;
  • the S-eNB Before starting the relocation step, the S-eNB needs to forward the DMPDU to the T-eNB;
  • Step 1 The S-eNB notifies the T-eNB in the Relocation REQ, and exchanges the role of the primary base station to the T-eNB, that is, the T-eNB performs the primary user plane function, but maintains its secondary user plane function. .
  • the message also includes the UE context of the terminal on the S-eNB.
  • the context of the terminal includes, but is not limited to, configuration information of the primary user plane function, terminal capability (UE capability) information of the terminal, address information of the upper layer network control plane and the user plane, and bearer configuration information sent by the upper layer network to the S-eNB.
  • the secondary base station after relocation receives the user plane address of the data packet.
  • the secondary base station after the relocation may include the current S-eNB and other secondary base stations.
  • Step 2 After receiving the Relocation REQ message of the S-eNB, the T-eNB saves the contents mentioned in step 1 and returns a message confirming that it becomes the new primary base station, that is, a Relocation REQ ACK message.
  • the message includes, but is not limited to, a user plane address of the received data packet after the T-eNB.
  • Step 3 After receiving the acknowledgement message of the T-eNB, the S-eNB sends the context of the primary user plane function to the S-eNB, and stops performing the function of the primary user plane. The S-eNB then forwards the received IP packet (the PDU that has not been processed by the primary user plane function) to the T-eNB.
  • the originally generated DMPDUs are no longer forwarded to other base stations including the T-eNB, but directly convert these DMPDUs into CPDUs and send them to the terminal.
  • the primary user plane context includes but is not limited to the first sequence number that the T-eNB can start to allocate (or the last assigned sequence number of the S-eNB).
  • Step 4 The T-eNB initiates a path switch process on the interface with the upper-layer network, and notifies the upper-layer network to switch the delivered IP packet route to the T-eNB. After the path switch process ends, the upper layer network starts to route IP packets to the T-eNB.
  • Step 5 The T-eNB starts to perform the primary user plane function.
  • the T-eNB starts forwarding the DMPDU according to the user plane address of the S-eNB and other secondary base stations in the Relocation REQ message.
  • Step5 can be executed after step3.
  • the secondary user plane function on the radio interface of each base station keeps executing, that is, no protocol stack reset operation occurs, and key configuration parameters, such as security-related encryption/decryption parameters. (such as keys, encryption/decryption algorithms, etc.) have not changed.
  • the T-eNB may send an RRC message to the terminal to notify the terminal that the latest primary base station is converted from the S-eNB to the T-eNB. This is just a control plane process that does not affect the operation of any wireless interface user plane.
  • the relocation function of the primary base station completed by this method is a lossless seamless Cheng.
  • Step1 Same as Step 1 of Embodiment 1;
  • Step 2 Same as Step 2 of Embodiment 1;
  • the T-eNB after transmitting the Relocation REQ ACK message, the T-eNB does not forward the UPDU to the S-eNB, but caches it locally;
  • the UPDU is a PDU obtained by the base station after processing (for example, decrypting) the CPDU from the terminal by using the secondary user plane module.
  • Step 2a After receiving the acknowledgment message of Relocation REQ ACK, the S-eNB notifies the other secondary base station that the primary base station has been converted from the S-eNB to the T-eNB by using a Relocation Notification message, and receives the data packet from the T-eNB.
  • the user plane address is also forwarded to other secondary base stations.
  • the other secondary base stations After receiving the notification message, the other secondary base stations forward the UPDU to the T-eNB and are not forwarded to the S-eNB.
  • Step 3 The S-eNB sends the control parameters of the reordering buffer to the T-eNB through the UP context, and forwards the UPDUs received from the self and other secondary base stations to the T-eNB.
  • the T-eNB starts performing the reordering function of the UPDU according to the received reordering context.
  • Step 3a The T-eNB sends the IP packet to the upper layer network in sequence
  • Step 4 the same as Step 4 of Embodiment 1;
  • the process of adding a base station and the process of converting the base station into a primary base station need to be merged on the radio interface.
  • the flow is as follows. Compared with the processes of Embodiment 1 and Embodiment 2, the following differences are made:
  • Step 1 Compared with Step 1 of Embodiment 1 and Embodiment 2, in the context of the UE, in addition to the content indicated in Embodiment 1, it may include, but is not limited to, the secondary user plane function of the terminal on the S-eNB. Configuration information, such as key parameters generated by the S-eNB to the T-eNB.
  • Step 2 Compared with Step 1 of Embodiment 1 and Embodiment 2, the Relocation REQ ACK message further includes configuration information of a secondary user plane function on the T-eNB;
  • Step 2a Compared with Step 2a of Embodiment 2, the method further includes: the S-eNB and the terminal perform an RRC reconfiguration process.
  • This reconfiguration process sends the configuration information of the secondary user plane function of the T-eNB in step 2 to the terminal, and notifies the terminal that the primary base station has been converted from the S-eNB to the T-eNB.
  • the terminal establishes a wireless connection with the T-eNB during the RRC reconfiguration process.
  • the RRC CON RECONF COMP message RRC Connection Reconfiguration Complete message
  • Step 3 The downlink process is the same as Step 3 of Embodiment 1; the uplink process is the same as Step 3 of Embodiment 2; and the method further includes: the T-eNB starts to send/receive CPDUs on the radio interface;
  • Step 4 the same as Step 4 of Embodiment 1 and Embodiment 2;
  • Step 5 the same as Step 5 of Embodiment 1;
  • the terminal can be notified in step 2a of Embodiment 3.
  • the terminal After receiving the RRC reconfiguration message, the terminal no longer performs data communication with the base station on the radio interface.
  • the new primary base station will notify the secondary base station to delete the context of the terminal.
  • the encrypted DMPDU is called a PDCP PDU, and the packet sequence number that is consistent with the DMPDU.
  • the sequence number of the PDCP PDU received by the terminal is n. Since the previous n-1 PDCP PDU has not been received, the receiving end of the terminal saves the PDCP PDU in the reordering buffer.
  • the sequence numbers of the DMPDUs buffered by the T-eNB are ⁇ n-1, n+1, n+3, n+5 ⁇ , respectively, and the sequence numbers of the DMPDUs buffered by the S-eNB are ⁇ n+2, n+4, n+6. , n+7 ⁇ .
  • the S-eNB needs to send the context of the primary user plane to the T-eNB, where it refers to the first sequence number that the T-eNB can give to the DMPDU, that is, n+8.
  • the S-eNB also sends the buffered IP packet to the T-eNB, but continues to cache the DMPDU of the related technology.
  • the T-eNB After receiving the context ⁇ n+8 ⁇ of the primary user plane, the T-eNB starts to perform the primary user plane function, starts to generate the DMPDU, and sends it to other secondary base stations, including the S-eNB.
  • the transmission of the PDCP PDU of the radio interface is in progress, and the terminal buffers the PDCP PDU of ⁇ n+2, n+4, n+5, n+6 ⁇ .
  • the original ⁇ n+3 ⁇ and the newly numbered ⁇ n+8, n+10 ⁇ DMPDUs are buffered on the T-eNB.
  • the originally reserved ⁇ n+7 ⁇ and the newly received ⁇ n+9, n+11 ⁇ DMPDUs are buffered on the S-eNB.
  • the T-eNB obtains an IP packet from the core network.
  • the encrypted PDU sent by the terminal is called a PDCP PDU.
  • the S-eNB's reordering buffer stores the ⁇ n+1, n+3 ⁇ UPDU, because the terminal has not sent the sequence number ⁇ n ⁇ .
  • the PDCP PDU, and the T-eNB has not forwarded the processed ⁇ n+2, n+4 ⁇ UPDU to the S-eNB. From this time on, the T-eNB continues to save the two UPDUs ( ⁇ n+2, n+4 ⁇ ) and continues to receive the PDCP PDUs of the radio interface.
  • the S-eNB sends the reordered context (such as the sequence number of the IP packet finally delivered to the core network, here n-1) to the T-eNB through the UP context, and also caches the sequence number as ⁇ n+1,n.
  • the +3 ⁇ UPDU is sent to the T-eNB.
  • the T-eNB also receives the PDCP PDU with the sequence number ⁇ n ⁇ at this time, according to the reordering context sent by the S-eNB, that is, the sequence number ⁇ n-1 ⁇ of the IP packet finally delivered to the core network, and all the buffered UPDUs. Reorder ⁇ n, n+1, n+2, n+3, n+4 ⁇ , and pass the corresponding IP packet to the core network in sequence.
  • the reassembly process to a working secondary base station includes:
  • Step 1 The S-eNB notifies the T-eNB in the Relocation REQ, and exchanges the role of the primary base station to the T-eNB, that is, the secondary base station performs the primary user plane function, but maintains its secondary user plane function.
  • the message also includes the UE context of the terminal on the S-eNB.
  • the terminal context includes, but is not limited to, the configuration information of the primary user plane function, the UE capability of the terminal, the address information of the upper layer network control plane and the user plane, the bearer configuration information sent by the upper layer network to the S-eNB, and the secondary base station after the relocation.
  • the secondary base station after relocation may include the current S-eNB and other secondary base stations.
  • Step 2 After receiving the Relocation REQ message of the S-eNB, the T-eNB saves the contents mentioned in step 1, and returns a message confirming that it is a new primary base station, that is, a Relocation REQ ACK message.
  • the message includes, but is not limited to, a user plane address of the received data packet after the T-eNB.
  • the T-eNB After transmitting the Relocation REQ ACK message, the T-eNB does not forward the UPDU to the S-eNB, but caches it locally.
  • Step 2a (Optionally) after receiving the Relocation REQ ACK message, the S-eNB notifies the terminal of the change of the primary base station by using the RRC message on the radio interface.
  • the message may also include configuration information of the primary cell on the primary base station.
  • Step 2b (optionally) after the S-eNB receives the Relocation REQ ACK message, if there are other secondary base stations (F-eNBs) other than the T-eNB, and the terminal is configured with an uplink radio bearer, then relocation notification The message is sent to the secondary base stations, and the notification content includes configuration information of the new primary base station, including but not limited to the new primary base station user plane address.
  • F-eNBs secondary base stations
  • the notification content includes configuration information of the new primary base station, including but not limited to the new primary base station user plane address.
  • Step2b There is no relationship between Step2b and step2a.
  • Step 2c The secondary base station receiving the notification message starts to forward the received UPDU to the new primary base station;
  • Step 3 After receiving the acknowledgement message of the T-eNB, the S-eNB sends the context of the primary user plane function to the T-eNB, and stops performing the function of the primary user plane. Then, for the downlink process, the S-eNB forwards the received IP packet to the T-eNB, and the originally generated DMPDU is not forwarded to other base stations including the T-eNB, but directly converts the DMPDU into CPDU transmission. Give the terminal. For the uplink procedure, the S-eNB forwards the UPDU in the reordering buffer to the T-eNB. T-eNB The reordering function of the UPDU is started according to the received reordering context.
  • the context of the primary user plane function includes, but is not limited to, the first sequence number that the T-eNB can start to allocate (or the sequence number finally assigned by the S-eNB); and the downlink radio bearer includes but is not limited to reordering. Control parameters.
  • Step 3a For the uplink process, the T-eNB starts to send the IP packet to the upper layer network;
  • Step 4 The T-eNB initiates a path switch process on the interface with the upper-layer network, and notifies the upper-layer network to switch the delivered IP packet route to the T-eNB. After the path switch process ends, the upper layer network starts to route IP packets to the T-eNB.
  • Step3 There is no strict order between Step3 and step4.
  • Step 5 The T-eNB generates a DMPDU, and starts to forward the DMPDU according to the user plane address of the S-eNB and other secondary base stations in the Relocation REQ message.
  • Step 5 starts execution after step 3.
  • the foregoing processes are all from the uplink of a radio bearer, or the uplink or downlink of a downlink or a radio bearer.
  • the primary base station is the primary base station of the user plane and the control plane at the same time, that is, the communication with the terminal and the upper layer network is performed by the original primary base station or the new primary base station.
  • a primary base station of a radio bearer control plane and a primary base station of a user plane are simultaneously relocated from the base station 1 to the base station 2. This is the model from all the previous examples.
  • Different radio bearers may have different primary base stations, so that when one bearer's primary base station changes, the other bearer's primary base station may remain unchanged.
  • the primary base station of the user plane and the primary base station of the control plane can be separated. When the primary base station of the user plane changes, the primary base station of the control plane can remain unchanged.
  • the user plane master base station of the radio bearer is relocated from the base station 1 to the base station 2, but The primary base station that is the control plane remains at base station 1. This means that in the relocation process, RRC signaling with the terminal is transmitted from the base station 1 and is also received by the base station 1. Moreover, after the base station 1 obtains the Relocation REQ ACK message of the base station 2, the flow of the path switch is also completed by the base station 1, instead of being completed by the base station 2.
  • the base station 1 corresponds to the S-eNB
  • the base station 2 corresponds to the T-eNB
  • the other secondary base stations (for example, the base station 3) correspond to the F-eNB;
  • Step 2a the RRC CON CONF COMP message will be sent to the S-eNB, and the path switch occurs between the S-eNB and the upper layer network.
  • the T-eNB needs to notify the S-eNB of the user plane address of the received IP packet in step 2
  • the S-eNB needs to notify the upper layer network of the address in the path switch process, so that the IP packet after step4 is made. Routing from the upper layer network to the T-eNB instead of the S-eNB.
  • the base station 1 (eNB1) is the primary base station of the control plane, and is also the user plane primary base station of the bearer 1.
  • the base station 2 (eNB2) is a secondary base station carrying 1 but at the same time is the primary base station carrying the user plane of 2
  • the base station 3 (eNB3) is the secondary base station carrying 2.
  • the primary base station of the control plane and the user plane primary base station of bearer 1 do not change, but the user plane primary base station of bearer 2 is changed from base station 2 (eNB2) to base station 3 (eNB2), so that base station 2 becomes A secondary base station common to bearer 1 and bearer 2.
  • the user plane only describes the change of the radio bearer 2.
  • the Relocation confirm message is sent by the eNB2 to the eNB1, which includes the user plane address of the IP packet received by the eNB3.
  • the message can also be sent by eNB3 to eNB1.
  • eNB1 After receiving the Relocation Confirm message, eNB1 initiates the path switch process of Step4. There is no strict time relationship between this process and step2a and step3.
  • the embodiment of the present invention further discloses a computer program, including program instructions, when the program instruction is executed by a base station, so that the base station can perform any method of realizing cellular network relocation on the source base station side.
  • the embodiment of the invention also discloses a carrier carrying the computer program.
  • the embodiment of the invention further discloses a computer program, comprising program instructions, when the program instruction is executed by a base station, so that the base station can perform the method for realizing cellular network relocation on any target base station side.
  • the embodiment of the invention also discloses a carrier carrying the computer program.
  • the foregoing embodiment provides a method for implementing cellular network relocation and a base station, where the relocated source base station notifies the retargeted target base station to perform a primary user plane function, and the source base station receives the acknowledgement message fed back by the target base station. Stop performing the primary user plane function on the base station, and send context information of the primary user plane function to the target base station, and the target base station performs the primary user plane function after receiving the context information of the primary user plane function.
  • the primary user plane function includes: a function of numbering data packets received from an upper layer network in a downlink direction, and reordering data packets from the terminal in an uplink direction; the secondary user plane function includes: receiving in an uplink direction The arriving data packet is decrypted and the data packet is encrypted in the downstream direction.
  • the secondary user plane function on the wireless interface of each base station is kept executing, that is, no protocol stack reset operation occurs, and key configuration parameters (such as security-related encryption/decryption parameters) are No change has taken place. Therefore, the terminal in the embodiment of the present invention does not cause user plane interruption when moving in the high-density micro-cellular network.
  • the relocation function of the primary base station in the embodiment of the present invention is a non-destructive seamless process.
  • the technical solution of the present invention can solve the problem of frequent interruption of the user plane in the high-density microcellular network, and therefore the present invention has strong industrial applicability.

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Mobile Radio Communication Systems (AREA)

Abstract

一种实现蜂窝网络重定位的方法和基站，该方法包括：源基站向重定位的目标基站发送用于指示所述目标基站执行主用户面功能的重定位请求消息，其中携带终端在源基站上的上下文信息；目标基站收到重定位请求消息后，向源基站返回用于确认自身是重定位后的主基站的重定位请求确认消息，其中携带本目标基站在重定位后接收数据包的用户面地址；源基站收到重定位请求确认消息后，将本基站上主用户面功能的上下文信息发送给目标基站，并停止执行主用户面功能；目标基站收到源基站发送的主用户面功能的上下文信息后，执行主用户面功能。本发明技术方案能够解决在高密度微蜂窝网络中用户面频繁中断的问题。

Description

一种实现蜂窝网络重定位的方法和基站 技术领域
本文涉及蜂窝网络定位技术领域，尤其涉及的是一种实现蜂窝网络重定位的方法和基站。
背景技术
在3GPP(3rd Generation Partnership Project，第三代合作伙伴计划)系统的发展历史上，在不同的场景下，不同的系统采用了不同的切换技术。在以宏蜂窝为主的移动网络中，比如GERAN(GSM EDGE Radio Access Network)网络，切换的主要目的是为了保持覆盖的连续性。在这种网络中，切换都是采用所谓“硬切换”的方式。硬切换是指终端在连接到新的目标小区之前，先和原来的服务小区先断开。这种切换技术的一个缺陷是，在切换过程中，用户面的传输会有简短的中断过程。对于实时业务来说，这也意味着丢包。假如用户面的中断时间因为蜂窝间重叠区域过小等原因变得比较长的话，用户可以明显地感觉到这个中断，比如会听到明显的“咔嗒”声。
在3GPP引入UMTS(Universal Mobile Telecommunications System，通用移动通信系统)系统的时候，为了提高用户的体验，引入了“软切换”技术。支持软切换的移动终端首先要支持和至少两个小区保持无线连接的能力。在发生软切换之前，网络可以先让移动终端和目标小区先连接在一起。然后网络再通知移动终端切换到这个目标小区。在切换到目标小区的时候，可以同时要求移动终端断开和源目标小区的连接，也可以选择保持无线连接。因为在这个过程中无线接口通讯一直保持着，所以理论上不会产生用户面的中断时间。这是这种切换称为“软切换”的原因。如果源服务小区和目标小区在一个基站内，那么这个切换被称为“更软切换”。这是因为源小区和目标小区之间的消息交换和数据包的前转过程都被省略了，所以切换的过程更加迅速。
在3GPP发展LTE(Long Term Evolution，长期演进)系统的时候，为了提高频谱效率，在工程上采用了越来越多的微蜂窝。这个微蜂窝和宏蜂窝比 较有两个显著的区别，一个是采用了相对来说比较高的频谱资源，比如2.4GHz，一个是其覆盖范围明显缩小，大概只有宏蜂窝的十分之一。这些微蜂窝的主要作用是吸收移动终端的上下行业务流量。所以一般情况下，这些微蜂窝和宏蜂窝在地理上有着重叠的覆盖区域，也就是说微蜂窝一般情况下在宏蜂窝的覆盖范围之内。当移动终端在宏蜂窝之间移动的时候，会穿过数量可观的微蜂窝。如果穿过微蜂窝也采用切换的技术，那么会导致用户面的中断。另外，对LTE系统来说，不管是S1切换，还是X2切换，都会和核心网有信令交互。过多的切换会导致核心网的信令风暴。在这种情况下，3GPP引入了两种技术来消除这些微蜂窝带来的负面影响。当基站之间的回程传输(backhaul)是所谓的理想backhaul的时候，采用载波聚合技术(carrier aggregation，CA)。当基站之间的backhaul是所谓的非理想backhaul的时候，采用双连接技术(dual connectivity，简称DC)。当采用CA技术的时候，移动终端穿过微蜂窝的时候，切换变成了一个辅小区(scell)的增加和删除的过程。因为终端总是和作为主小区(pcell)的宏蜂窝保持连接，所以scell的增加和删除不会引入用户面的中断，但是会导致空口业务的流量波动。配置CA的前提是所有的成员载波(component carrier，CC)都是由一个调度器控制。而且当CC分布在不同站点的时候，这些站点都是通过理想backhaul连接在一起的。当因为某些原因，比如成本问题，基站之间的backhaul是非理想的前提下，就需要采用DC技术。配置了DC以后。终端可以配置有3种承载方式，即MCG(主小区群)承载，SCG(辅小区群)承载和分叉承载。MCG承载是指在主基站(eNB)上单独配置的无线承载。SCG承载是指在辅基站(SeNB)上单独配置的承载。分叉承载(split bearer)是指由eNB和SeNB公共配置的无线承载。当终端穿过SeNB的覆盖范围的时候，会发生SeNB增加、删除或者SeNB更改的过程。对于split bearer来说，会产生类似CA下承载的效果，即不会发生用户面的中断，但是会产生流量波动。但是对SCG承载来说，会产生类似硬切换的效果。
CA和DC的split bearer在主小区(PCell)不发生改变的时候，从用户面的角度来说已经达到了类似“无缝切换”的效果。但是当PCell需要改变，或者SCG bearer需要更换SeNB的时候，在用户面同样会出现之前提到的“硬切换”或者“软切换”以及“更软切换”相同的问题，就是用户面的中断问 题。这个用户面的中断的最主要的原因在于3GPP的安全措施。
为了数据安全期间，3GPP系统的用户面数据在无线接口上需要加密和解密过程。如果是无线RRC(Radio Resource Control，无线资源控制)信令，还需要有完整性保护过程。对UMTS系统来说，安全相关的配置和计算在MAC(Media Access Control，媒体访问控制)协议层以上，而且在RNC(Radio Network Controller，无线网络控制器)中实现。在LTE系统中，安全相关的配置和计算都在PDCP(Packet Data Convergence Protocol，分组数据汇聚协议)层实现。一旦因为切换或者SeNB更改而导致安全参数需要重新配置的时候，相关的无线承载的PDCP和/或RLC(Radio Link Control，无线链路控制)层就需要重建，而MAC层和物理层会被复位。并且需要引入一个通用的流程，通常是随机接入过程，来进行安全参数的同步，即保证移动终端和基站，对某个具体的无线承载的用户面从什么时候开始采用新的安全参数要完全一致。这样的控制面的同步过程和用户面的重建/复位过程最终导致了用户面的中断。
蜂窝通讯系统今后的发展趋势是，低频段的频谱会越来越珍贵而且昂贵，微蜂窝会使用到更多的是高频段的频谱，比如3.5GHz。以6GHz为分界线，6GHz以上的毫米波的也会越来越普及。这使得微蜂窝的覆盖范围因为频谱的原因更加缩小。另外一个方面，因为移动互联网和物联网等技术的高速发展，单位面积的用户连接数和用户流量呈几何级数规律增长。为了提高网络的流量，一个可行的办法是在单位面积内布置更多的微蜂窝。为了减少微蜂窝之间的相互干扰，微蜂窝的发生功率又必须控制在一定的范围之间。这也使得以后的蜂窝网络的主要特征是高密度的微蜂窝网络。在这样的情况下，宏蜂窝功能会退化成主要用于承载控制面信令。在很多室内场景，比如体育馆，商场等会出现只有微蜂窝的网络布局。和之前的宏蜂窝同构网络，或者宏蜂窝、微蜂窝异构网络相比，终端在微蜂窝之间的移动会更加频繁。
因此，即使在配置CA或者DC的情况下也无法避免PCell的频繁更换。PCell频繁更换导致的用户面的中断将会严重影响TCP(Transmission Control Protocol，传输控制协议)层协议的流量控制，在出现TCP拥塞或者TCP丢包的时候，TCP流控窗口迅速减少，使得TCP层的流量控制出现锯齿形的规 律。
发明内容
本发明所要解决的技术问题是提供一种实现蜂窝网络重定位的方法和基站，能够解决在高密度微蜂窝网络中用户面频繁中断的问题。
为了解决上述技术问题，采用如下技术方案：
一种实现蜂窝网络重定位的方法，应用于重定位的源基站，包括：
所述源基站向重定位的目标基站发送用于指示所述目标基站执行主用户面功能的重定位请求消息，其中，所述重定位请求消息中携带终端在所述源基站上的上下文信息；
所述源基站接收到所述目标基站返回的用于确认所述目标基站是重定位后的主基站的重定位请求确认消息后，将所述源基站上所述主用户面功能的上下文信息发送给所述目标基站，并停止执行所述主用户面功能；其中，所述重定位请求确认消息中携带所述目标基站在重定位后接收数据包的用户面地址。
可选地，所述源基站为用户面主基站，所述目标基站为辅基站；
所述辅基站的辅用户面功能在重定位过程中保持执行；如所述源基站包含所述辅用户面功能，则所述源基站的所述辅用户面功能在重定位过程中保持执行。
可选地，对于上行无线承载，所述主用户面功能包括：对来自终端且经过辅用户面功能处理后的数据包进行重排序；对于下行无线承载，所述主用户面功能包括：对来自上层网络的数据包进行编号；
所述辅用户面功能包括以下功能的一种或多种：安全功能、无线链路控制RLC协议栈功能、媒体访问控制MAC协议栈功能和物理层PHY协议栈功能。
可选地，对于上行无线承载，所述源基站发送给所述目标基站的主用户面功能的上下文信息，包括：所述主用户面功能对数据包进行重排序的上下 文信息；
对于下行无线承载，所述源基站发送给所述目标基站的主用户面功能的上下文信息，包括：所述主用户面功能为数据包进行编号的上下文信息。
可选地，终端在所述源基站上的上下文信息，包括以下信息的至少一种：
主用户面功能的配置信息、终端的能力信息、上层网络控制面和用户面的地址信息、上层网络发给源基站的承载配置信息、重定位以后的辅基站接收数据包的用户面地址。
可选地，对于上行无线承载，在接收到所述目标基站发送的重定位请求确认消息的步骤后，该方法还包括：向除所述目标基站以外的其他辅基站发送重定位通知消息，所述重定位通知消息用于通知主基站从所述源基站重定位到所述目标基站，所述重定位通知消息中携带有所述目标基站接收数据包的用户面地址。
可选地，对于上行无线承载，在将所述源基站上主用户面功能的上下文信息发送给所述目标基站的步骤之后，该方法还包括：
将所述源基站的辅用户面功能处理后的数据包和/或接收到的其他辅基站处理后的数据包发送给所述目标基站；
对于下行无线承载，在将所述源基站上主用户面功能的上下文信息发送给所述目标基站的步骤之后，该方法还包括：
将来自上层网络还未经过主用户面功能编号的数据包发送给所述目标基站；和/或将来自上层网络并经过主用户面功能编号但还未发送给除所述辅基站以外的其他辅基站的数据包，缓存在本地并利用所述源基站上的辅用户面功能进行处理后发送给所述终端。
可选地，如所述目标基站为新加入的基站，则所述源基站发送给所述目标基站的重定位请求消息中携带的终端的上下文信息中还包括：终端在所述源基站上的辅用户面功能的配置信息。
可选地，如所述目标基站为新加入的基站，则所述源基站在接收到所述目标基站发送的重定位请求确认消息的步骤之后，该方法还包括：
如重定位开始前的控制面主基站为所述源基站，则所述源基站发起与终端之间的无线资源控制RRC重配置流程，如重定位开始前的控制面主基站为其他基站，则所述源基站通知所述其他基站发起与终端之间的无线资源控制RRC重配置流程；
其中，在所述RRC重配置流程中，通知所述终端所述用户面主基站从所述源基站重定位到所述目标基站，并且将所述目标基站的辅用户面功能的配置信息发送给所述终端。
一种实现蜂窝网络重定位的方法，应用于重定位的目标基站，包括：
所述目标基站接收到源基站发送的用于指示所述目标基站执行主用户面功能的重定位请求消息后，向所述源基站返回用于确认所述目标基站是重定位后的主基站的重定位请求确认消息；其中，所述重定位请求确认消息中携带所述目标基站在重定位后接收数据包的用户面地址；所述重定位请求消息中携带终端在所述源基站上的上下文信息；
所述目标基站收到所述源基站发送的主用户面功能的上下文信息后，执行主用户面功能。
可选地，所述源基站为用户面主基站，所述目标基站为辅基站；
所述辅基站的辅用户面功能在重定位过程中保持执行；如所述源基站包含辅用户面功能，则所述源基站的辅用户面功能在重定位过程中保持执行。
可选地，对于上行无线承载，所述主用户面功能包括：对来自终端且经过辅用户面功能处理后的数据包进行重排序；对于下行无线承载，所述主用户面功能包括：对来自上层网络的数据包进行编号；
所述辅用户面功能包括以下功能的一种或多种：安全功能、无线链路控制RLC协议栈功能、媒体访问控制MAC协议栈功能和物理层PHY协议栈功能。
可选地，对于上行无线承载，所述源基站发送给所述目标基站的主用户面功能的上下文信息，包括：所述主用户面功能对数据包进行重排序的上下 文信息；
对于下行无线承载，所述源基站发送给所述目标基站的主用户面功能的上下文信息，包括：所述主用户面功能为数据包进行编号的上下文信息。
可选地，终端在所述源基站上的上下文信息，包括以下信息的至少一种：主用户面功能的配置信息、终端的能力信息、上层网络控制面和用户面的地址信息、上层网络发给源基站的承载配置信息、重定位以后的辅基站接收数据包的用户面地址。
可选地，对于上行无线承载，所述目标基站在向所述源基站返回所述重定位请求确认消息的步骤之后，该方法还包括：将所述目标基站已经处理后的数据包缓存在本地；和/或接收其他基站辅用户面功能处理后的数据包。
可选地，所述目标基站收到所述源基站发送的主用户面功能的上下文信息后，执行主用户面功能的步骤包括：
对于上行无线承载，收到所述源基站发送的主用户面功能的上下文信息后，根据所述重排序上下文对数据包进行重排序，并且依序将数据包发送给上层网络；和/或，
对于下行无线承载，收到所述源基站发送的主用户面功能的上下文信息后，对数据包进行编号，将编号后的数据包发送给包含辅用户面功能的基站的用户面地址。
可选地，该方法还包括：
如重定位后的控制面主基站是所述目标基站，则所述目标基站向所述源基站返回用于确认本基站是重定位后的主基站的重定位请求确认消息的步骤之后，所述目标基站还发起用于通知上层网络将路由切换至所述目标基站的路由切换流程；
如重定位后的控制面主基站是其他基站，则所述目标基站向所述源基站返回用于确认本基站是重定位后的主基站的重定位请求确认消息的步骤之后，所述目标基站还通知其他基站发起用于通知上层网络将路由切换至所述目标基站的路由切换流程。
一种实现蜂窝网络重定位的基站，包括请求模块和响应接收及处理模块，其中：
所述请求模块设置成：向重定位的目标基站发送用于指示所述目标基站执行主用户面功能的重定位请求消息，其中，所述重定位请求消息中携带终端在所述源基站上的上下文信息；
所述响应接收及处理模块设置成：接收到所述目标基站返回的用于确认所述目标基站是重定位后的主基站的重定位请求确认消息后，将本基站上主用户面功能的上下文信息发送给所述目标基站，并停止执行所述主用户面功能；其中，所述重定位请求确认消息中携带所述目标基站在重定位后接收数据包的用户面地址。
可选地，所述源基站为用户面主基站，所述目标基站为辅基站；
所述辅基站的辅用户面功能在重定位过程中保持执行；如所述源基站包含所述辅用户面功能，则所述源基站的所述辅用户面功能在重定位过程中保持执行。
可选地，对于上行无线承载，所述主用户面功能包括：对来自终端且经过辅用户面功能处理后的数据包进行重排序；对于下行无线承载，所述主用户面功能包括：对来自上层网络的数据包进行编号；
所述辅用户面功能包括以下功能的一种或多种：安全功能、无线链路控制RLC协议栈功能、媒体访问控制MAC协议栈功能和物理层PHY协议栈功能。
可选地，对于上行无线承载，所述源基站发送给所述目标基站的主用户面功能的上下文信息，包括：所述主用户面功能对数据包进行重排序的上下文信息；
对于下行无线承载，所述源基站发送给所述目标基站的主用户面功能的上下文信息，包括：所述主用户面功能为数据包进行编号的上下文信息。
可选地，终端在所述源基站上的上下文信息，包括以下信息的至少一种：
主用户面功能的配置信息、终端的能力信息、上层网络控制面和用户面的地址信息、上层网络发给源基站的承载配置信息、重定位以后的辅基站接收数据包的用户面地址。
可选地，所述响应接收及处理模块还设置成：对于上行无线承载，在接收到所述目标基站发送的重定位请求确认消息后，向其他辅基站发送重定位通知消息，所述重定位通知消息用于通知主基站从所述源基站重定位到所述目标基站，所述重定位通知消息中携带有所述目标基站接收数据包的用户面地址。
可选地，所述响应接收及处理模块还设置成：对于上行无线承载，在将本基站上主用户面功能的上下文信息发送给所述目标基站后，将本基站的辅用户面功能处理后的数据包和/或接收到的其他辅基站处理后的数据包发送给所述目标基站；和/或，对于下行无线承载，在将本基站上主用户面功能的上下文信息发送给所述目标基站后，将来自上层网络还未经过主用户面功能编号的数据包发送给所述目标基站；和/或将来自上层网络并经过主用户面功能编号但还未发送给除所述辅基站以外的其他辅基站的数据包，缓存在本地并利用本基站上的辅用户面功能进行处理后发送给所述终端。
可选地，如所述目标基站为新加入的基站，则所述源基站发送给所述目标基站的重定位请求消息中携带的终端的上下文信息，还包括：终端在所述源基站上的辅用户面功能的配置信息。
可选地，所述响应接收及处理模块还设置成：
如所述目标基站为新加入的基站，则在接收到所述目标基站发送的重定位请求确认消息后，
如重定位开始前的控制面主基站为本基站，则发起与终端之间的无线资源控制RRC重配置流程，如重定位开始前的控制面主基站为其他基站，则通知所述其他基站发起与终端之间的无线资源控制RRC重配置流程；
其中，在所述RRC重配置流程中，通知所述终端所述用户面主基站从所述源基站重定位到所述目标基站，并且将所述目标基站的辅用户面功能的配置信息发送给所述终端。
一种实现蜂窝网络重定位的基站，包括请求接收及处理模块和重定位执行模块，其中：
所述请求接收及处理模块设置成：接收到源基站发送的用于指示所述目标基站执行主用户面功能的重定位请求消息后，向所述源基站返回用于确认本基站是重定位后的主基站的重定位请求确认消息；其中，所述重定位请求确认消息中携带本基站在重定位后接收数据包的用户面地址；所述重定位请求消息中携带终端在所述源基站上的上下文信息；
所述重定位执行模块设置成：收到所述源基站发送的主用户面功能的上下文信息后，执行所述主用户面功能。
可选地，所述源基站为用户面主基站，所述目标基站为辅基站；
所述辅基站的辅用户面功能在重定位过程中保持执行；如所述源基站包含辅用户面功能，则所述源基站的辅用户面功能在重定位过程中保持执行。
可选地，对于上行无线承载，所述主用户面功能包括：对来自终端且经过辅用户面功能处理后的数据包进行重排序；对于下行无线承载，所述主用户面功能包括：对来自上层网络的数据包进行编号；
所述辅用户面功能包括以下功能的一种或多种：安全功能、无线链路控制RLC协议栈功能、媒体访问控制MAC协议栈功能和物理层PHY协议栈功能。
可选地，对于上行无线承载，所述源基站发送给所述目标基站的主用户面功能的上下文信息，包括：所述主用户面功能对数据包进行重排序的上下文信息；
对于下行无线承载，所述源基站发送给所述目标基站的主用户面功能的上下文信息，包括：所述主用户面功能为数据包进行编号的上下文信息。
可选地，终端在所述源基站上的上下文信息，包括以下信息的至少一种：
主用户面功能的配置信息、终端的能力信息、上层网络控制面和用户面的地址信息、上层网络发给源基站的承载配置信息、重定位以后的辅基站接 收数据包的用户面地址。
可选地，所述请求接收及处理模块还设置成：对于上行无线承载，在向所述源基站返回所述重定位请求确认消息后，将本基站已经处理后的数据包缓存在本地；和/或接收其他基站辅用户面功能处理后的数据包。
可选地，所述重定位执行模块收到所述源基站发送的主用户面功能的上下文信息后，设置成按照如下方式执行所述主用户面功能：
对于上行无线承载，收到所述源基站发送的主用户面功能的上下文信息后，根据所述重排序上下文对数据包进行重排序，并且依序将数据包发送给上层网络；和/或，
对于下行无线承载，收到所述源基站发送的主用户面功能的上下文信息后，对数据包进行编号，将编号后的数据包发送给包含辅用户面功能的基站的用户面地址。
可选地，该基站还包括路由切换处理模块，其中：
所述路由切换处理模块设置成：如重定位后的控制面主基站是本基站，则在向所述源基站返回用于确认本基站是重定位后的主基站的重定位请求确认消息后，发起用于通知上层网络将路由切换至所述目标基站的路由切换流程；如重定位后的控制面主基站是其他基站，则在向所述源基站返回用于确认本基站是重定位后的主基站的重定位请求确认消息后，通知所述其他基站发起用于通知上层网络将路由切换至所述目标基站的路由切换流程。
与相关技术相比，本发明技术方案提供的一种实现蜂窝网络重定位的方法和基站，重定位的源基站通知重定位的目标基站执行主用户面功能，所述源基站在收到所述目标基站反馈的确认消息后，停止执行本基站上的主用户面功能，向目标基站发送主用户面功能的上下文信息，所述目标基站在接收到主用户面功能的上下文信息后执行主用户面功能。其中，主用户面功能包括：在下行方向上对从上层网络接收的数据包进行编号的功能以及在上行方向上对来自终端的数据包进行重排序；辅用户面功能包括：在上行方向上对 接收到的数据包进行解密处理，以及在下行方向上对数据包进行加密处理。本发明技术方案中，各个基站的无线接口上辅用户面功能一直保持继续执行，也就是说不发生任何协议栈复位操作，而且关键的配置参数(比如和安全相关的加密/解密的参数)都没有发生变化。因此，本发明技术方案中的终端在高密度微蜂窝网络中移动时不会导致用户面中断，本发明技术方案的主基站的重定位功能是一个无损无缝的过程。
附图概述
图1为本发明实施例的下行链路的协议栈。
图2为本发明实施例的上行链路的协议栈。
图3为本发明实施例的一种实现蜂窝网络重定位的方法流程图(包括源基站和目标基站)。
图4为本发明实施例的一种实现蜂窝网络重定位的方法流程图(源基站)。
图5为本发明实施例的一种实现蜂窝网络重定位的方法流程图(目标基站)。
图6为本发明实施例一种实现蜂窝网络重定位的源基站的结构示意图。
图7为本发明实施例一种实现蜂窝网络重定位的目标基站的结构示意图。
图8为本发明实施例1的下行链路的信息交互示意图。
图9为本发明实施例2的上行链路的信息交互示意图。
图10为本发明实施例3的信息交互示意图(目标基站是新增的辅基站)。
图11为本发明实施例5的下行链路的信息交互示意图。
图12为本发明实施例6的上行链路的信息交互示意图。
图13为本发明实施例7的信息交互示意图(包含上行链路和下行链路)。
图14为本发明实施例8的一种基站重定位的示意图。
图15为本发明实施例9的另一种基站重定位的示意图。
图16为本发明实施例10的另一种基站重定位的示意图。
图17为本发明实施例10的信息交互示意图。
本发明的较佳实施方式
以下是对本文详细描述的主题的概述。本概述并非是为了限制权利要求的保护范围。
下文中将结合附图对本发明的实施例进行详细说明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互任意组合。
本发明实施例中，一个无线承载的用户面功能由两个部分组成，即主用户面功能和辅用户面功能。配置了所述无线承载的终端和两个或者两个以上的基站有无线连接。其中，至少包含了主用户面功能的基站称为用户面主基站，一个无线承载的用户面主基站只有一个；只包含辅用户面功能的其他基站称为辅基站。
用户面主基站用来接收上层数据，通常是IP数据包，或者把接收到的数据包发送给上层网络。也就是说用户面主基站是这个终端上所建立的一个无线承载的一个锚点。用户面主基站上完成主用户面功能的模块称为主用户面模块。辅基站和用户面主基站上完成辅用户面功能的模块称为辅用户面模块。
控制面主基站和上层网络以及终端之间进行控制面的信令交互，用来控制无线承载的建立过程，以及本发明实施例所述的主基站重定位过程。所有的无线承载共享同一个控制面主基站。
不同的无线承载的用户面主基站可以在不同的基站上，也可以在同一个基站上。
控制面主基站和用户面主基站可以在不同的基站上，也可以在同一个基站上。
在本发明实施例中主基站重定位指的是用户面主基站的重定位。当控制面主基站和用户面主基站在同一个基站上，并且网络决定把控制面主基站和用户面主基站同时进行重定位的时候，主基站重定位还包括了控制面主基站的重定位。
在后文中，除非特殊说明，主基站指的是用户面主基站。
在下行方向上，上层网络将IP包发送给主基站，主基站的主用户面模块对IP包进行处理(比如，编号)获得PDU(本文称为DMPDU)传递给本基站和辅基站的辅用户面模块，主基站的辅用户面模块对DMPDU进行处理(比如，加密)获得PDU(CPDU)发送给终端，辅基站的辅用户面模块对DMPDU进行处理(比如，加密)获得PDU(CPDU)发送给终端。终端对来自主基站和辅基站的CPDU进行处理(比如，解密)获得DMPDU，然后对DMPDU进行重排序，再传递给上层。
在上行方向上，终端将IP包进行编号获得PDU(本文称为UPDU)，再将UPDU经过进一步的处理(比如，加密)获得CPDU，将CPDU发送给主基站和辅基站。主基站的辅用户面模块对CPDU进行处理(比如，解密)获得UPDU，辅基站的辅用户面模块对CPDU进行处理(比如，解密)获得UPDU并发送给主基站，主基站的主用户面模块将来自本基站和辅基站的UPDU进行重排序，然后发送给上层网络。
对于无线承载的下行链路来说，主用户面功能至少包含了给上层数据编号的功能。主用户面功能可以包括头压缩功能。
对于无线承载的上行链路来说，主用户面功能至少包括了重排序和按序传递数据包给上层的功能。
辅用户面功能至少包含了安全功能，包括但不限于加密(Ciphering)功能(作为发送方)和解密(Deciphering)功能(作为接收方)。辅用户面功能还可以包括RLC协议栈功能，MAC协议栈功能和PHY(物理层协议)协议栈功能。
以两个基站为例，下行链路的协议栈如图1所示。在图1中，主用户面功能是SN allocation，即序号分配功能。辅用户面功能是指Ciphering和RLC/MAC/PHY协议栈功能。
图1中主基站和辅基站的RLC/MAC/PHY的执行功能是一致的。他们的配置参数可以相同，也可以不相同。其中主基站和辅基站的Ciphering中的配 置参数，比如说密钥，是不一样的，而对DRB(Data Radio Bearer，数据无线承载)的处理功能是一样的。
在终端一侧，除了Deciphering/RLC/MAC/PHY这些功能以外，接收方还包括reordering(重排序)功能，以及in order delivery and duplication detection(按序传递和重复检测)功能。其中，Reordering功能是指，终端在接收到不同基站的PDU以后，需要在一个重排序窗口中对这些PDU进行排序，因为从不同基站接收到的PDU前后顺序是无法保证的，尽管在任何一个基站上接收到的PDU是按序收到的。Deciphering中的配置参数分别和对应基站的Ciphering中的配置参数保持一致，这样才能够成功解码。
以两个基站为例，上行链路的协议栈如图2所示。其中主基站只有一个，辅基站可以有多个。
图2中，主用户面功能是指reordering(重排序)功能和in order delivery and duplication detection(按序传递和重复检测)功能。辅用户面功能是指Deciphering(解密)功能和RLC/MAC/PHY协议栈功能。主用户面和辅用户面之间可以进行HFN(Hyper Frame Number，超帧号)的同步过程，以保证辅用户面的解密能够顺利完成。对于Deciphering功能来说，如果在尝试了当前的HFN解密失败以后，可以尝试采用HFN+1进行解密操作。
如图3所示，本发明实施例提供了一种实现蜂窝网络重定位的方法，该方法包括：
S10，源基站向重定位的目标基站发送用于指示所述目标基站执行主用户面功能的重定位请求消息，所述重定位请求消息中携带终端在所述源基站上的上下文信息；
S20，所述目标基站收到所述重定位请求消息后，向所述源基站返回用于确认自身是重定位后的主基站的重定位请求确认消息，所述重定位请求确认消息中携带本目标基站在重定位后接收数据包的用户面地址；
S30，所述源基站收到所述重定位请求确认消息后，将本基站上主用户面 功能的上下文信息发送给所述目标基站，并停止执行主用户面功能；
S40，所述目标基站收到所述源基站发送的主用户面功能的上下文信息后，执行主用户面功能；
所述方法还可以包括下述特点：
其中，所述源基站为用户面主基站，所述目标基站为辅基站；
所述辅基站的辅用户面功能在重定位过程中保持执行；如所述源基站包含辅用户面功能，则所述源基站的辅用户面功能在重定位过程中保持执行。也即，所述源基站、目标基站和/或其他辅基站上的辅用户面功能在重定位过程中保持执行，所述辅用户面功能上与安全相关的配置参数不变；也即，所述辅用户面功能不发生任何协议栈功能的复位操作；
其中，对于上行无线承载，所述主用户面功能包括：对来自终端且经过辅用户面功能处理后的数据包进行重排序；对于下行无线承载，所述主用户面功能包括：对来自上层网络的数据包进行编号；
所述辅用户面功能还包括以下功能的一种或多种：安全功能、无线链路控制RLC协议栈功能、媒体访问控制MAC协议栈功能和物理层PHY协议栈功能。
其中，所述目标基站为重定位发起前已经工作的辅基站或者为新加入的基站；
其中，终端在所述源基站上的上下文信息，包括以下信息的至少一种：主用户面功能的配置信息、终端的终端能力(UE capability)信息、上层网络控制面和用户面的地址信息、上层网络发给源基站的承载配置信息、重定位以后的辅基站接收数据包的用户面地址；
其中，重定位以后的辅基站包括：所述源基站和/或其他辅基站；
其中，所述目标基站收到所述重定位请求消息后，还包括：所述目标基站保存从所述重定位请求消息中接收到的终端的上下文信息；
其中，对于上行无线承载，所述目标基站在向所述源基站发送重定位请求确认消息后，还包括：所述目标基站将已经处理后的数据包缓存在本地；
其中，对于上行无线承载，所述源基站在接收到所述目标基站发送的重 定位请求确认消息后，还包括：所述源基站向其他辅基站发送重定位通知消息，所述重定位通知消息用于通知主基站从所述源基站重定位到所述目标基站，其中携带所述目标基站接收数据包的用户面地址；
其中，对于上行无线承载，所述方法还包括：其他辅基站在接收到所述源基站发送的重定位通知消息后，将处理后的数据包发送给所述目标基站；
其中，对于上行无线承载，所述源基站发送给所述目标基站的主用户面功能的上下文信息，包括：所述主用户面功能对数据包进行重排序的上下文信息；
其中，对于上行无线承载，所述源基站在向所述目标基站发送主用户面功能的上下文信息后，还包括：
所述源基站将本基站的辅用户面功能处理后的数据包和/或接收到的其他辅基站处理后的数据包发送给所述目标基站；
其中，对于上行无线承载，所述目标基站收到所述源基站发送的主用户面功能的上下文信息后，执行主用户面功能，包括：
所述目标基站根据所述重排序上下文对数据包进行重排序，并且依序将数据包发送给上层网络；
对于下行无线承载，所述源基站发送给所述目标基站的主用户面功能的上下文信息，包括：
所述主用户面功能为数据包进行编号的上下文信息；
其中，所述主用户面功能为数据包进行编号的上下文信息，包括：所述目标基站在重定位后能够为数据包分配的第一个序号或本基站的主用户面功能为数据包分配的最后一个序号；
其中，对于下行无线承载，所述目标基站收到所述源基站发送的主用户面功能的上下文信息后，执行主用户面功能，包括：
对数据包进行编号，将编号后的数据包发送到所述源基站和/或其他辅基站的用户面地址；
其中，对于下行无线承载，所述源基站在向所述目标基站发送主用户面功能的上下文信息后，还包括：
将来自上层网络还未经过主用户面功能编号的数据包发送给所述目标基站；和/或将来自上层网络并经过主用户面功能编号但还未发送给其他辅基站的数据包，缓存在本地并利用本基站上的辅用户面功能进行处理后发送给所述终端；
其中，如所述目标基站为新加入的基站，则所述源基站发送给所述目标基站的重定位请求消息中携带的终端的上下文信息，还包括：终端在所述源基站上的辅用户面功能的配置信息；
其中，终端在所述源基站上的辅用户面功能的配置信息，包括：密钥参数；
其中，如所述目标基站为新加入的基站，则所述目标基站发送给所述源基站的重定位请求确认消息中还携带：所述目标基站的辅用户面功能的配置信息；
其中，如所述目标基站为新加入的基站，则所述源基站在接收到所述目标基站发送的重定位请求确认消息后，还包括：
如重定位开始前的控制面主基站为所述源基站，则所述源基站发起与终端之间的无线资源控制RRC重配置流程，如重定位开始前的控制面主基站为其他基站，则所述源基站通知所述其他基站发起与终端之间的无线资源控制RRC重配置流程；
其中，在所述RRC重配置流程中，通知所述终端所述用户面主基站从所述源基站重定位到所述目标基站，并且将所述目标基站的辅用户面功能的配置信息发送给所述终端；
其中，如所述源基站在重定位后不再是辅基站，则所述源基站在与终端的RRC重配置流程中，还包括：所述源基站通知终端自身不再是辅基站；所述终端在接收到所述通知后，停止与所述源基站的数据通讯；
其中，如所述源基站在重定位后不再是辅基站，则所述目标基站在完成与上层网络之间的路由切换流程后，还包括：所述目标基站通知所述源基站删除所述终端的上下文信息；
其中，所述源基站在接收到所述目标基站发送的重定位请求确认消息后， 还包括：所述源基站向终端发送用于通知终端主基站从所述源基站重定位到所述目标基站的RRC消息；
其中，不同的无线承载对应的用户面主基站相同或不相同；同一承载的用户面对应的主基站与控制面对应的主基站相同或不相同；
如图4所示，本发明实施例提供了一种实现蜂窝网络重定位的方法，应用于重定位的源基站，包括：
S10，向重定位的目标基站发送用于指示所述目标基站执行主用户面功能的重定位请求消息，所述重定位请求消息中携带终端在所述源基站上的上下文信息；
S20，接收到目标基站返回的用于确认目标基站是重定位后的主基站的重定位请求确认消息后，将本基站上主用户面功能的上下文信息发送给所述目标基站，并停止执行主用户面功能；其中，所述重定位请求确认消息中携带目标基站在重定位后接收数据包的用户面地址；
所述方法还可以包括下述特点：
其中，所所述源基站为用户面主基站，所述目标基站为辅基站；
所述辅基站的辅用户面功能在重定位过程中保持执行；如所述源基站包含辅用户面功能，则所述源基站的辅用户面功能在重定位过程中保持执行；
其中，对于上行无线承载，所述主用户面功能包括：对来自终端且经过辅用户面功能处理后的数据包进行重排序；对于下行无线承载，所述主用户面功能包括：对来自上层网络的数据包进行编号；
所述辅用户面功能还包括以下功能的一种或多种：安全功能、无线链路控制RLC协议栈功能、媒体访问控制MAC协议栈功能和物理层PHY协议栈功能；
其中，所述安全功能，比如，对于下行承载，对来自上层网络的数据包进行加密处理，对于上行无线承载，对来自终端的数据包进行解密处理；
其中，终端在所述源基站上的上下文信息，包括以下信息的至少一种： 主用户面功能的配置信息、终端的能力信息、上层网络控制面和用户面的地址信息、上层网络发给源基站的承载配置信息、重定位以后的辅基站接收数据包的用户面地址；
其中，对于上行无线承载，在接收到所述目标基站发送的重定位请求确认消息后，还包括：向其他辅基站发送重定位通知消息，所述重定位通知消息用于通知主基站从所述源基站重定位到所述目标基站，其中携带所述目标基站接收数据包的用户面地址；
其中，对于上行无线承载，所述源基站发送给所述目标基站的主用户面功能的上下文信息，包括：所述主用户面功能对数据包进行重排序的上下文信息；
其中，对于下行无线承载，所述源基站发送给所述目标基站的主用户面功能的上下文信息，包括：所述主用户面功能为数据包进行编号的上下文信息；
其中，所述主用户面功能为数据包进行编号的上下文信息，包括：所述目标基站在重定位后能够为数据包分配的第一个序号或本基站的主用户面功能为数据包分配的最后一个序号；
其中，对于上行无线承载，在向所述目标基站发送主用户面功能的上下文信息后，还包括：
将本基站的辅用户面功能处理后的数据包和/或接收到的其他辅基站处理后的数据包发送给所述目标基站；
其中，对于下行无线承载，在向所述目标基站发送主用户面功能的上下文信息后，还包括：
将来自上层网络还未经过主用户面功能编号的数据包发送给所述目标基站；和/或将来自上层网络并经过主用户面功能编号但还未发送给其他辅基站的数据包，缓存在本地并利用本基站上的辅用户面功能进行处理后发送给所述终端；
其中，如所述目标基站为新加入的基站，则所述源基站发送给所述目标基站的重定位请求消息中携带的终端的上下文信息，还包括：终端在所述源 基站上的辅用户面功能的配置信息；
其中，如所述目标基站为新加入的基站，则在接收到所述目标基站发送的重定位请求确认消息后，还包括：
如重定位开始前的控制面主基站为所述源基站，则所述源基站发起与终端之间的无线资源控制RRC重配置流程，如重定位开始前的控制面主基站为其他基站，则所述源基站通知所述其他基站发起与终端之间的无线资源控制RRC重配置流程；
其中，在所述RRC重配置流程中，通知所述终端所述用户面主基站从所述源基站重定位到所述目标基站，并且将所述目标基站的辅用户面功能的配置信息发送给所述终端；
其中，如所述源基站在重定位后不再是辅基站，则在与终端的RRC重配置流程中，还包括：通知终端本基站不再是辅基站；
其中，在接收到所述目标基站发送的重定位请求确认消息后，还包括：向终端发送用于通知终端主基站从所述源基站重定位到所述目标基站的RRC消息；
其中，不同的无线承载对应的用户面主基站相同或不相同；同一承载的用户面对应的主基站与控制面对应的主基站相同或不相同；
如图5所示，本发明实施例提供了一种实现蜂窝网络重定位的方法，应用于重定位的目标基站，包括：
S10，接收到源基站发送的用于指示所述目标基站执行主用户面功能的重定位请求消息后，向所述源基站返回用于确认本基站是重定位后的主基站的重定位请求确认消息；其中，所述重定位请求确认消息中携带本目标基站在重定位后接收数据包的用户面地址；所述重定位请求消息中携带终端在所述源基站上的上下文信息；
S20，收到所述源基站发送的主用户面功能的上下文信息后，执行主用户面功能；
所述方法还可以包括下述特点：
其中，所述源基站为用户面主基站，所述目标基站为辅基站；
所述辅基站的辅用户面功能在重定位过程中保持执行；如所述源基站包含辅用户面功能，则所述源基站的辅用户面功能在重定位过程中保持执行；
其中，所述目标基站为重定位发起前已经工作的辅基站或者为新加入的基站；
其中，对于上行无线承载，所述主用户面功能包括：对来自终端且经过辅用户面功能处理后的数据包进行重排序；对于下行无线承载，所述主用户面功能包括：对来自上层网络的数据包进行编号；
所述辅用户面功能还包括以下功能的一种或多种：安全功能、无线链路控制RLC协议栈功能、媒体访问控制MAC协议栈功能和物理层PHY协议栈功能；
其中，终端在所述源基站上的上下文信息，包括以下信息的至少一种：主用户面功能的配置信息、终端的能力信息、上层网络控制面和用户面的地址信息、上层网络发给源基站的承载配置信息、重定位以后的辅基站接收数据包的用户面地址；
其中，重定位以后的辅基站包括：所述源基站和/或其他辅基站；
其中，收到所述重定位请求消息后，还包括：保存从所述重定位请求消息中接收到的终端的上下文信息；
其中，对于上行无线承载，在向所述源基站发送重定位请求确认消息后，还包括：将本基站已经处理后的数据包缓存在本地；
其中，对于上行无线承载，在向所述源基站发送重定位请求确认消息后，还包括：接收其他基站辅用户面功能处理后的数据包；
其中，对于上行无线承载，所述源基站发送给所述目标基站的主用户面功能的上下文信息，包括：所述主用户面功能对数据包进行重排序的上下文信息；
其中，对于下行无线承载，所述源基站发送给所述目标基站的主用户面功能的上下文信息，包括：所述主用户面功能为数据包进行编号的上下文信 息；
其中，所述主用户面功能为数据包进行编号的上下文信息，包括：所述目标基站在重定位后能够为数据包分配的第一个序号或本基站的主用户面功能为数据包分配的最后一个序号；
其中，收到所述源基站发送的主用户面功能的上下文信息后，执行主用户面功能，包括：对于上行无线承载，收到所述源基站发送的主用户面功能的上下文信息后，根据所述重排序上下文对数据包进行重排序，并且依序将数据包发送给上层网络；和/或对于下行无线承载，收到所述源基站发送的主用户面功能的上下文信息后，对数据包进行编号，将编号后的数据包发送给包含辅用户面功能的基站的用户面地址；
其中，如重定位后的控制面主基站是所述目标基站，则在向所述源基站返回用于确认本基站是重定位后的主基站的重定位请求确认消息后，所述目标基站还发起用于通知上层网络将路由切换至所述目标基站的路由切换流程；
如重定位后的控制面主基站是其他基站，则在向所述源基站返回用于确认本基站是重定位后的主基站的重定位请求确认消息后，所述目标基站还通知所述其他基站发起用于通知上层网络将路由切换至所述目标基站的路由切换流程。
其中，如所述目标基站为新加入的基站，则所述源基站发送给所述目标基站的重定位请求消息中携带的终端的上下文信息，还包括：终端在所述源基站上的辅用户面功能的配置信息；
其中，如所述源基站在重定位后不再是辅基站，则所述目标基站在完成与上层网络之间的路由切换流程后，还包括：所述目标基站通知所述源基站删除所述终端的上下文信息；
其中，不同的无线承载对应的用户面主基站相同或不相同；同一承载的用户面对应的主基站与控制面对应的主基站相同或不相同；
如图6所示，本发明实施例提供了一种实现蜂窝网络重定位的源基站， 包括：
请求模块601，设置成：向重定位的目标基站发送用于指示所述目标基站执行主用户面功能的重定位请求消息，所述重定位请求消息中携带终端在所述源基站上的上下文信息；
响应接收及处理模块602，设置成：接收到目标基站返回的用于确认目标基站是重定位后的主基站的重定位请求确认消息后，将本基站上主用户面功能的上下文信息发送给所述目标基站，并停止执行主用户面功能；其中，所述重定位请求确认消息中携带目标基站在重定位后接收数据包的用户面地址；
所述源基站还可以包括下述特点：
其中，所述源基站为用户面主基站，所述目标基站为辅基站；
所述辅基站的辅用户面功能在重定位过程中保持执行；如所述源基站包含辅用户面功能，则所述源基站的辅用户面功能在重定位过程中保持执行；
其中，对于上行无线承载，所述主用户面功能包括：对来自终端且经过辅用户面功能处理后的数据包进行重排序；对于下行无线承载，所述主用户面功能包括：对来自上层网络的数据包进行编号；
所述辅用户面功能还包括以下功能的一种或多种：安全功能、无线链路控制RLC协议栈功能、媒体访问控制MAC协议栈功能和物理层PHY协议栈功能；
其中，终端在所述源基站上的上下文信息，包括以下信息的至少一种：主用户面功能的配置信息、终端的能力信息、上层网络控制面和用户面的地址信息、上层网络发给源基站的承载配置信息、重定位以后的辅基站接收数据包的用户面地址；
其中，响应接收及处理模块602，设置成：对于上行无线承载，在接收到所述目标基站发送的重定位请求确认消息后，还包括：向其他辅基站发送重定位通知消息，所述重定位通知消息用于通知主基站从所述源基站重定位到所述目标基站，其中携带所述目标基站接收数据包的用户面地址；
其中，对于上行无线承载，所述源基站发送给所述目标基站的主用户面 功能的上下文信息，包括：所述主用户面功能对数据包进行重排序的上下文信息；
其中，对于下行无线承载，所述源基站发送给所述目标基站的主用户面功能的上下文信息，包括：所述主用户面功能为数据包进行编号的上下文信息；
其中，所述主用户面功能为数据包进行编号的上下文信息，包括：所述目标基站在重定位后能够为数据包分配的第一个序号或本基站的主用户面功能为数据包分配的最后一个序号；
其中，响应接收及处理模块602，设置成：对于上行无线承载，在向所述目标基站发送主用户面功能的上下文信息后，还包括：
将本基站的辅用户面功能处理后的数据包和/或接收到的其他辅基站处理后的数据包发送给所述目标基站；
其中，响应接收及处理模块602，设置成：对于下行无线承载，在向所述目标基站发送主用户面功能的上下文信息后，还包括：
将来自上层网络还未经过主用户面功能编号的数据包发送给所述目标基站；和/或将来自上层网络并经过主用户面功能编号但还未发送给其他辅基站的数据包，缓存在本地并利用本基站上的辅用户面功能进行处理后发送给所述终端；
其中，如所述目标基站为新加入的基站，则所述源基站发送给所述目标基站的重定位请求消息中携带的终端的上下文信息，还包括：终端在所述源基站上的辅用户面功能的配置信息；
其中，如所述目标基站为新加入的基站，则响应接收及处理模块602，设置成：在接收到所述目标基站发送的重定位请求确认消息后，还包括：
如重定位开始前的控制面主基站为所述源基站，则发起与终端之间的无线资源控制RRC重配置流程，如重定位开始前的控制面主基站为其他基站，则通知所述其他基站发起与终端之间的无线资源控制RRC重配置流程；
其中，在所述RRC重配置流程中，通知所述终端所述用户面主基站从所述源基站重定位到所述目标基站，并且将所述目标基站的辅用户面功能的配 置信息发送给所述终端；
其中，响应接收及处理模块602，设置成：如所述源基站在重定位后不再是辅基站，则在与终端的RRC重配置流程中，还包括：通知终端本基站不再是辅基站；
其中，响应接收及处理模块602，设置成：在接收到所述目标基站发送的重定位请求确认消息后，还包括：向终端发送用于通知终端主基站从所述源基站重定位到所述目标基站的RRC消息；
其中，不同的无线承载对应的用户面主基站相同或不相同；同一承载的用户面对应的主基站与控制面对应的主基站相同或不相同；
如图7所示，本发明实施例提供了一种实现蜂窝网络重定位的目标基站，包括：
请求接收及处理模块701，设置成：接收到源基站发送的用于指示所述目标基站执行主用户面功能的重定位请求消息后，向所述源基站返回用于确认本基站是重定位后的主基站的重定位请求确认消息；其中，所述重定位请求确认消息中携带本目标基站在重定位后接收数据包的用户面地址；所述重定位请求消息中携带终端在所述源基站上的上下文信息；
重定位执行模块702，设置成：收到所述源基站发送的主用户面功能的上下文信息后，执行主用户面功能；
所述目标基站还可以包括下述特点：
其中，所述源基站为用户面主基站，所述目标基站为辅基站；
所述辅基站的辅用户面功能在重定位过程中保持执行；如所述源基站包含辅用户面功能，则所述源基站的辅用户面功能在重定位过程中保持执行；
其中，所述目标基站为重定位发起前已经工作的辅基站或者为新加入的基站；
其中，对于上行无线承载，所述主用户面功能包括：对来自终端且经过辅用户面功能处理后的数据包进行重排序；对于下行无线承载，所述主用户 面功能包括：对来自上层网络的数据包进行编号；
所述辅用户面功能还包括以下功能的一种或多种：安全功能、无线链路控制RLC协议栈功能、媒体访问控制MAC协议栈功能和物理层PHY协议栈功能；
其中，终端在所述源基站上的上下文信息，包括以下信息的至少一种：主用户面功能的配置信息、终端的能力信息、上层网络控制面和用户面的地址信息、上层网络发给源基站的承载配置信息、重定位以后的辅基站接收数据包的用户面地址；
其中，重定位以后的辅基站包括：所述源基站和/或其他辅基站；
其中，请求接收及处理模块701，设置成：收到所述重定位请求消息后，还包括：保存从所述重定位请求消息中接收到的终端的上下文信息；
其中，请求接收及处理模块701，设置成：对于上行无线承载，在向所述源基站发送重定位请求确认消息后，还包括：将本基站已经处理后的数据包缓存在本地；和/或接收其他辅基站辅用户面功能处理后的数据包；
其中，对于上行无线承载，所述源基站发送给所述目标基站的主用户面功能的上下文信息，包括：所述主用户面功能对数据包进行重排序的上下文信息；
其中，对于下行无线承载，所述源基站发送给所述目标基站的主用户面功能的上下文信息，包括：所述主用户面功能为数据包进行编号的上下文信息；
其中，所述主用户面功能为数据包进行编号的上下文信息，包括：所述目标基站在重定位后能够为数据包分配的第一个序号或本基站的主用户面功能为数据包分配的最后一个序号；
其中，重定位执行模块702，设置成：收到所述源基站发送的主用户面功能的上下文信息后，执行主用户面功能，包括：对于上行无线承载，收到所述源基站发送的主用户面功能的上下文信息后，根据所述重排序上下文对数据包进行重排序，并且依序将数据包发送给上层网络；和/或对于下行无线承载，收到所述源基站发送的主用户面功能的上下文信息后，对数据包进行 编号，将编号后的数据包发送给包含辅用户面功能的基站的用户面地址；
其中，所述目标基站还包括路由切换处理模块，
路由切换处理模块，设置成：如重定位后的控制面主基站是所述目标基站，则在向所述源基站返回用于确认本基站是重定位后的主基站的重定位请求确认消息后，发起用于通知上层网络将路由切换至所述目标基站的路由切换流程；如重定位后的控制面主基站是其他基站，则在向所述源基站返回用于确认本基站是重定位后的主基站的重定位请求确认消息后，通知所述其他基站发起用于通知上层网络将路由切换至所述目标基站的路由切换流程。
其中，如所述目标基站为新加入的基站，则所述源基站发送给所述目标基站的重定位请求消息中携带的终端的上下文信息，还包括：终端在所述源基站上的辅用户面功能的配置信息；
其中，重定位执行模块702，设置成：如所述源基站在重定位后不再是辅基站，则所述目标基站在完成与上层网络之间的路由切换流程后，还包括：所述目标基站通知所述源基站删除所述终端的上下文信息；
其中，不同的无线承载对应的用户面主基站相同或不相同；同一承载的用户面对应的主基站与控制面对应的主基站相同或不相同；
实施例1
如图8所示，S-eNB是当前的主基站，也是重定位的源基站。T-eNB是当前的一个辅基站，也是重定位的目标基站。
DMPDU是指主用户面模块处理(比如，分配序号)后的PDU；CPDU是指辅用户面模块处理(比如，加密)后的PDU；主基站接收到来自上层网络的IP packet之后，利用主用户面模块为IP packet分配序号获得DMPDU；
在开始重定位的步骤之前，S-eNB需要把DMPDU转发给T-eNB；
Step1：S-eNB在重定位请求(Relocation REQ)中通知T-eNB，把主基站的角色交换给T-eNB，也就是让该T-eNB执行主用户面功能，但是保持其辅用户面功能。在这个消息中还包含终端在S-eNB上的终端的上下文(UE context)。
其中，终端的上下文包括但不限于主用户面功能的配置信息，终端的终端能力(UE capability)信息，上层网络控制面和用户面的地址信息，上层网络发给S-eNB的承载配置信息，重定位以后的辅基站接收数据包的用户面地址。其中，重定位以后的辅基站可以包括当前的S-eNB和其他辅基站。
Step2：T-eNB收到S-eNB的Relocation REQ消息以后，保存在step1中提到的这些内容，并且返回确认其成为新的主基站的消息，即重定位请求确认(Relocation REQ ACK)消息。该消息中包括但不限于T-eNB之后接收数据包的用户面地址。
Step3：S-eNB在收到T-eNB的确认消息以后，把主用户面功能的上下文发送给S-eNB，并且停止执行主用户面的功能。然后S-eNB把接收到的IP packet(未经过主用户面功能处理的PDU)转发给T-eNB。原来已经产生的DMPDU不再转发给包括T-eNB在内的其他基站，而是直接把这些DMPDU转换成CPDU发送给终端
其中，主用户面上下文包括但不限于T-eNB第一个可以开始分配的序号(或者是S-eNB最后分配的序号)。
Step4：T-eNB在和上层网络的接口上发起Path switch的流程，通知上层网络把下发的IP packet路由换到T-eNB上。上层网络在Path switch流程结束以后，就开始把IP packet路由到T-eNB上。
Step5：T-eNB开始执行主用户面功能。T-eNB根据在Relocation REQ消息中的S-eNB和其他辅基站的用户面地址，开始转发DMPDU。
其中，Step3和step4之间没有严格的顺序规定；Step5可以在step3之后开始执行。
在上述的所有步骤过程中，各个基站的无线接口上辅用户面功能一直保持继续执行，也就是说不发生任何协议栈复位操作，而且关键的配置参数，比如和安全相关的加密/解密的参数(比如密钥，加密/解密算法等等)都没有发生变化。T-eNB可以发送一个RRC消息给终端通知终端最新的主基站从S-eNB转换成T-eNB。这只是一个控制面流程，即不会影响任何无线接口用户面的操作。采用这种方法完成的主基站的重定位功能是一个无损无缝的过 程。
实施例2
如图9所示，当终端配置有上行的无线承载的时候，流程如下，与实施例1的上行流程相比，具有以下改变：
Step1：同实施例1的Step1；
Step2：同实施例1的Step2；
另外，T-eNB在发送Relocation REQ ACK消息以后，不再把UPDU转发给S-eNB，而是缓存在本地；
其中，UPDU是基站通过辅用户面模块对来自终端的CPDU进行处理(比如，解密)后获得的PDU。
Step2a：S-eNB收到Relocation REQ ACK这个确认消息以后，通过重定位通知(Relocation Notification)消息通知其他辅基站主基站已经从S-eNB转换成T-eNB，并且把T-eNB接收数据包的用户面地址也转发给其他辅基站。其他辅基站在接收到通知消息以后，把UPDU转发给T-eNB，而不再转发给S-eNB。
Step3：S-eNB把重排序缓冲的控制参数通过UP context发给T-eNB，并且从自己和其他辅基站接收到的UPDU转发给T-eNB。T-eNB根据接收到的重排序上下文开始执行UPDU的重排序功能。
Step3a：T-eNB按序把IP packet发送给上层网络；
Step4：与实施例1的Step4相同；
实施例3
如图10所示，当T-eNB是一个新加入的基站的时候，需要把增加基站的过程和把该基站转换成主基站的过程在无线接口上合并在一起。流程如下，与实施例1和实施例2的流程相比，有以下的区别：
Step1：与实施例1和实施例2的Step1相比，UE的上下文中，除了实施例1中指出的内容之外，还会包括但不限于该终端在S-eNB上的辅用户面功能的配置信息，比如S-eNB给T-eNB产生的密钥参数等。
Step2：与实施例1和实施例2的Step1相比，Relocation REQ ACK消息中还包括T-eNB上辅用户面功能的配置信息；
Step2a：与实施例2的Step2a相比，还包括：S-eNB和终端执行一个RRC重配置过程。这个重配置过程会把T-eNB在step2中的辅用户面功能的配置信息发送给终端，并且会通知终端主基站已经从S-eNB转换成T-eNB。在RRC重配置过程中终端和T-eNB建立无线连接。终端的RRC CON RECONF COMP消息(RRC连接重配置完成消息)从终端发送到新的主基站。
Step3：下行流程同实施例1的Step3；上行流程同实施例2的Step3；还包括：T-eNB开始在无线接口发送/接收CPDU；
step4：与实施例1和实施例2的Step4相同；
step5：与实施例1的Step5相同；
实施例4
如果S-eNB在实施例1或者实施例2或者实施例3表示的流程结束之后不再是辅基站，也就是需要删除的时候，那么可以在实施例3的step2a步骤中通知给终端。终端在接收到这个RRC重配置消息以后，就不再在无线接口和这个基站进行数据通讯。另外在step4的Path switch完成以后，新的主基站将会通知该辅基站删除该终端的上下文。
实施例5
如图11所示，对于下行流程，在这个例子中，经过加密以后的DMPDU称为PDCP PDU，和DMPDU保持一致的数据包序号。
在step2的时候，终端接收到的PDCP PDU的序号是n，因为还没有收到之前的n-1的PDCP PDU，所以终端的接收端把这个PDCP PDU保存在重排序的缓冲中。T-eNB缓存的DMPDU的序号分别是{n-1,n+1,n+3,n+5}，而S-eNB缓存的DMPDU的序号是{n+2,n+4,n+6,n+7}。
S-eNB需要把主用户面的上下文发给T-eNB，在此处指的是T-eNB第一个可以给DMPDU编号的序号，也就是n+8。S-eNB在发送主用户面的上下文的时候，还把缓存的IP packet也发给T-eNB，但是继续缓存相关技术的DMPDU。
T-eNB接收到这个主用户面的上下文{n+8}以后，就开始执行主用户面功能，开始生成DMPDU，并且发给其他的辅基站，包括S-eNB。在这个过程中，无线接口的PDCP PDU的发送一直在进行过程中，此时终端缓存了{n+2,n+4,n+5,n+6}的PDCP PDU。T-eNB上缓存了原来的{n+3}和新编号的{n+8,n+10}的DMPDU。S-eNB上缓存了原来保留的{n+7}和新收到的{n+9,n+11}的DMPDU。
在step4的Path switch以后，T-eNB从核心网得到IP packet。
实施例6
如图12所示，对于上行流程，在这个例子中，终端发出的经过加密以后的PDU称为PDCP PDU。
在step2S-eNB接收到T-eNB的确认消息的时候，S-eNB的重排序缓冲中保存了{n+1，n+3}的UPDU，这是因为终端还没有发送序号是{n}的PDCP PDU，而T-eNB还没有把处理后的{n+2,n+4}的UPDU转发给S-eNB。从这个时候起，T-eNB继续保存这两个UPDU({n+2,n+4})，并且继续接收无线接口的PDCP PDU。
S-eNB把重排序的上下文(比如最后传递给核心网的IP packet的序号，此处是n-1)通过UP context发送给T-eNB，并且也把缓存的序号是{n+1，n+3}的UPDU发送给T-eNB。T-eNB此时也收到了序号是{n}的PDCP PDU，根据S-eNB发过来的重排序上下文，即最后传递给核心网的IP packet的序号{n-1}，把所有缓存的UPDU重新排序{n,n+1,n+2,n+3,n+4}，并且依序把对应的IP packet传递给核心网。
实施例7
如图13所示，重定位到一个正在工作的辅基站(上行和下行)的合并流程，包括：
Step1：S-eNB在Relocation REQ中通知T-eNB，把主基站的角色交换给T-eNB，也就是让该辅基站执行主用户面功能，但是保持其辅用户面功能。在这个消息中还包含终端在S-eNB上的终端的上下文(UE context)。
其中，终端上下文包括但不限于主用户面功能的配置信息，终端的UE capability，上层网络控制面和用户面的地址信息，上层网络发给S-eNB的承载配置信息，重定位以后的辅基站接收数据包的用户面地址。重定位以后的辅基站可以包括当前的S-eNB和其他辅基站。
Step2：T-eNB收到S-eNB的Relocation REQ消息以后，保存在step1中提到的这些内容，并且返回确认其为新的主基站的消息，即Relocation REQ ACK消息。该消息中包括但不限于T-eNB之后接收数据包的用户面地址。
其中，对于上行流程，T-eNB在发送Relocation REQ ACK消息以后，不再把UPDU转发给S-eNB，而是缓存在本地。
Step2a：(可选地)S-eNB在收到Relocation REQ ACK消息以后，在无线接口通过RRC消息通知终端主基站发生改变的消息。这个消息中还可以包括主基站上主小区的配置信息。
Step2b：(可选地)S-eNB在收到Relocation REQ ACK消息以后，如果除了T-eNB以外还有其他的辅基站(F-eNB)，并且该终端配置有上行的无线承载，那么relocation notification消息给这些辅基站，通知内容包括新的主基站的配置信息，包括但不限于新的主基站的用户面地址。
Step2b和step2a之间没有先后关系。
Step2c：收到通知消息的辅基站开始把收到的UPDU转发给新的主基站；
Step3：S-eNB在收到T-eNB的确认消息以后，把主用户面功能的上下文发送给T-eNB，并且停止执行主用户面的功能。然后，对于下行流程，S-eNB把接收到的IP packet转发给T-eNB，原来已经产生的DMPDU不再转发给包括T-eNB在内的其他基站，而是直接把这些DMPDU转换成CPDU发送给终端。对于上行流程，S-eNB把在重排序缓冲中的UPDU转发给T-eNB。T-eNB 根据接收到的重排序上下文开始UPDU的重排序功能。
其中，主用户面功能的上下文，针对上行无线承载包括但不限于T-eNB第一个可以开始分配的序号(或者是S-eNB最后分配的序号)；针对下行无线承载包括但不限于重排序的控制参数。
Step3a：对于上行流程，T-eNB开始把IP packet发送给上层网络；
Step4：T-eNB在和上层网络的接口上发起Path switch的流程，通知上层网络把下发的IP packet路由换到T-eNB上。上层网络在Path switch流程结束以后，就开始把IP packet路由到T-eNB上。
Step3和step4之间没有严格的顺序规定。
Step5：T-eNB生成DMPDU，并且根据在Relocation REQ消息中的S-eNB和其他辅基站的用户面地址，开始转发DMPDU。
Step5在step3之后开始执行。
需要说明的是上述流程都是从一个无线承载的上行链路，或者下行链路或者一个无线承载的上行和下行链路来说的。而且主基站同时是用户面和控制面的主基站，即与终端以及上层网络之间的通讯都是通过原来的主基站或者新的主基站进行的。
实施例8
如图14所示，一个无线承载控制面主基站和用户面的主基站同时从基站1重定位到了基站2。这是前面所有例子中的模型。
进一步来说，可以有更加灵活的实施方式。不同的无线承载可以有不同的主基站，这样当一个承载的主基站发生变化的时候，另外一个承载的主基站可以保持不变。另外，用户面的主基站和控制面的主基站可以分离，当用户面的主基站发生变化的时候，控制面的主基站可以保持不变。
实施例9
如图15所示，无线承载的用户面主基站从基站1重定位到了基站2，但 是控制面的主基站却保留在基站1。这意味着说，在重定位过程中，与终端的RRC信令是从基站1发送出去的，也是由基站1接收的。而且基站1在得到基站2的Relocation REQ ACK消息以后，path switch的流程也是由基站1来完成的，而不是由基站2来完成的。
参考图13，本例中，基站1对应到S-eNB，基站2对应到T-eNB，其他辅基站(比如，基站3)对应到F-eNB；
Step2a中，RRC CON CONF COMP消息将会发送给S-eNB，而path switch是发生在S-eNB和上层网络之间。为了配合这个变化，在step2中T-eNB需要把接收IP packet的用户面地址通知给S-eNB，而S-eNB在path switch过程需要把该地址通知给上层网络，从而使得step4以后的IP packet从上层网络路由到T-eNB，而不是S-eNB。
实施例10
如图16所示，基站1(eNB1)是控制面的主基站，同时也是承载1的用户面主基站。基站2(eNB2)是承载1的辅基站，但同时是承载2的用户面的主基站，基站3(eNB3)是承载2的辅基站。重定位之后，控制面的主基站以及承载1的用户面主基站都没有发生变化，但是承载2的用户面主基站从基站2(eNB2)转变成了基站3(eNB2)，这样基站2就成为承载1和承载2共同的辅基站。
图17中，用户面只描述了无线承载2的变化情况，Relocation confirm消息由eNB2发送给eNB1的，其中包括了eNB3接收IP packet的用户面地址。当然该消息也可以由eNB3发送给eNB1。eNB1接收到Relocation Confirm消息以后，会发起Step4的path switch过程，这个过程和step2a，step3之间没有严格的时间关系。
本发明实施例还公开了一种计算机程序，包括程序指令，当该程序指令被基站执行时，使得该基站可执行上述任意的源基站侧的实现蜂窝网络重定位的方法。
本发明实施例还公开了一种载有所述的计算机程序的载体。
本发明实施例还公开了一种计算机程序，包括程序指令，当该程序指令被基站执行时，使得该基站可执行上述任意的目标基站侧的实现蜂窝网络重定位的方法。
本发明实施例还公开了一种载有所述的计算机程序的载体。
在阅读并理解了附图和详细描述后，可以明白其他方面。
上述实施例提供的一种实现蜂窝网络重定位的方法和基站，重定位的源基站通知重定位的目标基站执行主用户面功能，所述源基站在收到所述目标基站反馈的确认消息后，停止执行本基站上的主用户面功能，向目标基站发送主用户面功能的上下文信息，所述目标基站在接收到主用户面功能的上下文信息后执行主用户面功能。其中，主用户面功能包括：在下行方向上对从上层网络接收的数据包进行编号的功能以及在上行方向上对来自终端的数据包进行重排序；辅用户面功能包括：在上行方向上对接收到的数据包进行解密处理，以及在下行方向上对数据包进行加密处理。本发明实施例中，各个基站的无线接口上辅用户面功能一直保持继续执行，也就是说不发生任何协议栈复位操作，而且关键的配置参数(比如和安全相关的加密/解密的参数)都没有发生变化。因此，本发明实施例中的终端在高密度微蜂窝网络中移动时不会导致用户面中断，本发明实施例的主基站的重定位功能是一个无损无缝的过程。
本领域普通技术人员可以理解上述方法中的全部或部分步骤可通过程序来指令相关硬件完成，所述程序可以存储于计算机可读存储介质中，如只读存储器、磁盘或光盘等。可选地，上述实施例的全部或部分步骤也可以使用一个或多个集成电路来实现，相应地，上述实施例中的各模块/单元可以采用硬件的形式实现，也可以采用软件功能模块的形式实现。本发明不限制于任何特定形式的硬件和软件的结合。
需要说明的是，本发明还可有其他多种实施例，在不背离本发明精神及其实质的情况下，熟悉本领域的技术人员可根据本发明作出各种相应的改变和变形，但这些相应的改变和变形都应属于本发明所附的权利要求的保护范围。
工业实用性
本发明技术方案能够解决在高密度微蜂窝网络中用户面频繁中断的问题，因此本发明具有很强的工业实用性。

Claims (34)

  1. 一种实现蜂窝网络重定位的方法，应用于重定位的源基站，包括：
    所述源基站向重定位的目标基站发送用于指示所述目标基站执行主用户面功能的重定位请求消息，其中，所述重定位请求消息中携带终端在所述源基站上的上下文信息；
    所述源基站接收到所述目标基站返回的用于确认所述目标基站是重定位后的主基站的重定位请求确认消息后，将所述源基站上所述主用户面功能的上下文信息发送给所述目标基站，并停止执行所述主用户面功能；其中，所述重定位请求确认消息中携带所述目标基站在重定位后接收数据包的用户面地址。
  2. 如权利要求1所述的实现蜂窝网络重定位的方法，其中：
    所述源基站为用户面主基站，所述目标基站为辅基站；
    所述辅基站的辅用户面功能在重定位过程中保持执行；如所述源基站包含所述辅用户面功能，则所述源基站的所述辅用户面功能在重定位过程中保持执行。
  3. 如权利要求2所述的实现蜂窝网络重定位的方法，其中：
    对于上行无线承载，所述主用户面功能包括：对来自终端且经过辅用户面功能处理后的数据包进行重排序；对于下行无线承载，所述主用户面功能包括：对来自上层网络的数据包进行编号；
    所述辅用户面功能包括以下功能的一种或多种：安全功能、无线链路控制RLC协议栈功能、媒体访问控制MAC协议栈功能和物理层PHY协议栈功能。
  4. 如权利要求3所述的实现蜂窝网络重定位的方法，其中：
    对于上行无线承载，所述源基站发送给所述目标基站的主用户面功能的上下文信息，包括：所述主用户面功能对数据包进行重排序的上下文信息；
    对于下行无线承载，所述源基站发送给所述目标基站的主用户面功能的 上下文信息，包括：所述主用户面功能为数据包进行编号的上下文信息。
  5. 如权利要求1或2或3或4所述的实现蜂窝网络重定位的方法，其中，终端在所述源基站上的上下文信息，包括以下信息的至少一种：
    主用户面功能的配置信息、终端的能力信息、上层网络控制面和用户面的地址信息、上层网络发给源基站的承载配置信息、重定位以后的辅基站接收数据包的用户面地址。
  6. 如权利要求1或2或3或4所述的实现蜂窝网络重定位的方法，其中：
    对于上行无线承载，在接收到所述目标基站发送的重定位请求确认消息的步骤后，该方法还包括：向除所述目标基站以外的其他辅基站发送重定位通知消息，所述重定位通知消息用于通知主基站从所述源基站重定位到所述目标基站，所述重定位通知消息中携带有所述目标基站接收数据包的用户面地址。
  7. 如权利要求3所述的实现蜂窝网络重定位的方法，其中：
    对于上行无线承载，在将所述源基站上主用户面功能的上下文信息发送给所述目标基站的步骤之后，该方法还包括：
    将所述源基站的辅用户面功能处理后的数据包和/或接收到的其他辅基站处理后的数据包发送给所述目标基站；
    对于下行无线承载，在将所述源基站上主用户面功能的上下文信息发送给所述目标基站的步骤之后，该方法还包括：
    将来自上层网络还未经过主用户面功能编号的数据包发送给所述目标基站；和/或将来自上层网络并经过主用户面功能编号但还未发送给除所述辅基站以外的其他辅基站的数据包，缓存在本地并利用所述源基站上的辅用户面功能进行处理后发送给所述终端。
  8. 如权利要求5所述的实现蜂窝网络重定位的方法，其中：
    如所述目标基站为新加入的基站，则所述源基站发送给所述目标基站的重定位请求消息中携带的终端的上下文信息中还包括：终端在所述源基站上 的辅用户面功能的配置信息。
  9. 如权利要求8所述的实现蜂窝网络重定位的方法，其中：
    如所述目标基站为新加入的基站，则所述源基站在接收到所述目标基站发送的重定位请求确认消息的步骤之后，该方法还包括：
    如重定位开始前的控制面主基站为所述源基站，则所述源基站发起与终端之间的无线资源控制RRC重配置流程，如重定位开始前的控制面主基站为其他基站，则所述源基站通知所述其他基站发起与终端之间的无线资源控制RRC重配置流程；
    其中，在所述RRC重配置流程中，通知所述终端所述用户面主基站从所述源基站重定位到所述目标基站，并且将所述目标基站的辅用户面功能的配置信息发送给所述终端。
  10. 一种实现蜂窝网络重定位的方法，应用于重定位的目标基站，包括：
    所述目标基站接收到源基站发送的用于指示所述目标基站执行主用户面功能的重定位请求消息后，向所述源基站返回用于确认所述目标基站是重定位后的主基站的重定位请求确认消息；其中，所述重定位请求确认消息中携带所述目标基站在重定位后接收数据包的用户面地址；所述重定位请求消息中携带终端在所述源基站上的上下文信息；
    所述目标基站收到所述源基站发送的主用户面功能的上下文信息后，执行主用户面功能。
  11. 如权利要求10所述的实现蜂窝网络重定位的方法，其中：
    所述源基站为用户面主基站，所述目标基站为辅基站；
    所述辅基站的辅用户面功能在重定位过程中保持执行；如所述源基站包含辅用户面功能，则所述源基站的辅用户面功能在重定位过程中保持执行。
  12. 如权利要求11所述的实现蜂窝网络重定位的方法，其中：
    对于上行无线承载，所述主用户面功能包括：对来自终端且经过辅用户面功能处理后的数据包进行重排序；对于下行无线承载，所述主用户面功能 包括：对来自上层网络的数据包进行编号；
    所述辅用户面功能包括以下功能的一种或多种：安全功能、无线链路控制RLC协议栈功能、媒体访问控制MAC协议栈功能和物理层PHY协议栈功能。
  13. 如权利要求12所述的实现蜂窝网络重定位的方法，其中：
    对于上行无线承载，所述源基站发送给所述目标基站的主用户面功能的上下文信息，包括：所述主用户面功能对数据包进行重排序的上下文信息；
    对于下行无线承载，所述源基站发送给所述目标基站的主用户面功能的上下文信息，包括：所述主用户面功能为数据包进行编号的上下文信息。
  14. 如权利要求10或11或12或13所述的实现蜂窝网络重定位的方法，其中：
    终端在所述源基站上的上下文信息，包括以下信息的至少一种：主用户面功能的配置信息、终端的能力信息、上层网络控制面和用户面的地址信息、上层网络发给源基站的承载配置信息、重定位以后的辅基站接收数据包的用户面地址。
  15. 如权利要求10或11或12或13所述的实现蜂窝网络重定位的方法，其中：
    对于上行无线承载，所述目标基站在向所述源基站返回所述重定位请求确认消息的步骤之后，该方法还包括：将所述目标基站已经处理后的数据包缓存在本地；和/或接收其他基站辅用户面功能处理后的数据包。
  16. 如权利要求13所述的实现蜂窝网络重定位的方法，其中，所述目标基站收到所述源基站发送的主用户面功能的上下文信息后，执行主用户面功能的步骤包括：
    对于上行无线承载，收到所述源基站发送的主用户面功能的上下文信息后，根据所述重排序上下文对数据包进行重排序，并且依序将数据包发送给上层网络；和/或，
    对于下行无线承载，收到所述源基站发送的主用户面功能的上下文信息后，对数据包进行编号，将编号后的数据包发送给包含辅用户面功能的基站的用户面地址。
  17. 如权利要求11或12或13所述的实现蜂窝网络重定位的方法，该方法还包括：
    如重定位后的控制面主基站是所述目标基站，则所述目标基站向所述源基站返回用于确认本基站是重定位后的主基站的重定位请求确认消息的步骤之后，所述目标基站还发起用于通知上层网络将路由切换至所述目标基站的路由切换流程；
    如重定位后的控制面主基站是其他基站，则所述目标基站向所述源基站返回用于确认本基站是重定位后的主基站的重定位请求确认消息的步骤之后，所述目标基站还通知其他基站发起用于通知上层网络将路由切换至所述目标基站的路由切换流程。
  18. 一种实现蜂窝网络重定位的基站，包括请求模块和响应接收及处理模块，其中：
    所述请求模块设置成：向重定位的目标基站发送用于指示所述目标基站执行主用户面功能的重定位请求消息，其中，所述重定位请求消息中携带终端在所述源基站上的上下文信息；
    所述响应接收及处理模块设置成：接收到所述目标基站返回的用于确认所述目标基站是重定位后的主基站的重定位请求确认消息后，将本基站上主用户面功能的上下文信息发送给所述目标基站，并停止执行所述主用户面功能；其中，所述重定位请求确认消息中携带所述目标基站在重定位后接收数据包的用户面地址。
  19. 如权利要求18所述的实现蜂窝网络重定位的基站，其中：
    所述源基站为用户面主基站，所述目标基站为辅基站；
    所述辅基站的辅用户面功能在重定位过程中保持执行；如所述源基站包含所述辅用户面功能，则所述源基站的所述辅用户面功能在重定位过程中保 持执行。
  20. 如权利要求19所述的实现蜂窝网络重定位的基站，其中：
    对于上行无线承载，所述主用户面功能包括：对来自终端且经过辅用户面功能处理后的数据包进行重排序；对于下行无线承载，所述主用户面功能包括：对来自上层网络的数据包进行编号；
    所述辅用户面功能包括以下功能的一种或多种：安全功能、无线链路控制RLC协议栈功能、媒体访问控制MAC协议栈功能和物理层PHY协议栈功能。
  21. 如权利要求20所述的实现蜂窝网络重定位的基站，其中：
    对于上行无线承载，所述源基站发送给所述目标基站的主用户面功能的上下文信息，包括：所述主用户面功能对数据包进行重排序的上下文信息；
    对于下行无线承载，所述源基站发送给所述目标基站的主用户面功能的上下文信息，包括：所述主用户面功能为数据包进行编号的上下文信息。
  22. 如权利要求18或19或20或21所述的实现蜂窝网络重定位的基站，其中，终端在所述源基站上的上下文信息，包括以下信息的至少一种：
    主用户面功能的配置信息、终端的能力信息、上层网络控制面和用户面的地址信息、上层网络发给源基站的承载配置信息、重定位以后的辅基站接收数据包的用户面地址。
  23. 如权利要求18或19或20或21所述的实现蜂窝网络重定位的基站，其中：
    所述响应接收及处理模块还设置成：对于上行无线承载，在接收到所述目标基站发送的重定位请求确认消息后，向其他辅基站发送重定位通知消息，所述重定位通知消息用于通知主基站从所述源基站重定位到所述目标基站，所述重定位通知消息中携带有所述目标基站接收数据包的用户面地址。
  24. 如权利要求21所述的实现蜂窝网络重定位的基站，其中：
    所述响应接收及处理模块还设置成：对于上行无线承载，在将本基站上 主用户面功能的上下文信息发送给所述目标基站后，将本基站的辅用户面功能处理后的数据包和/或接收到的其他辅基站处理后的数据包发送给所述目标基站；和/或，对于下行无线承载，在将本基站上主用户面功能的上下文信息发送给所述目标基站后，将来自上层网络还未经过主用户面功能编号的数据包发送给所述目标基站；和/或将来自上层网络并经过主用户面功能编号但还未发送给除所述辅基站以外的其他辅基站的数据包，缓存在本地并利用本基站上的辅用户面功能进行处理后发送给所述终端。
  25. 如权利要求22所述的实现蜂窝网络重定位的基站，其中：
    如所述目标基站为新加入的基站，则所述源基站发送给所述目标基站的重定位请求消息中携带的终端的上下文信息，还包括：终端在所述源基站上的辅用户面功能的配置信息。
  26. 如权利要求25所述的实现蜂窝网络重定位的基站，其中，所述响应接收及处理模块还设置成：
    如所述目标基站为新加入的基站，则在接收到所述目标基站发送的重定位请求确认消息后，
    如重定位开始前的控制面主基站为本基站，则发起与终端之间的无线资源控制RRC重配置流程，如重定位开始前的控制面主基站为其他基站，则通知所述其他基站发起与终端之间的无线资源控制RRC重配置流程；
    其中，在所述RRC重配置流程中，通知所述终端所述用户面主基站从所述源基站重定位到所述目标基站，并且将所述目标基站的辅用户面功能的配置信息发送给所述终端。
  27. 一种实现蜂窝网络重定位的基站，包括请求接收及处理模块和重定位执行模块，其中：
    所述请求接收及处理模块设置成：接收到源基站发送的用于指示所述目标基站执行主用户面功能的重定位请求消息后，向所述源基站返回用于确认本基站是重定位后的主基站的重定位请求确认消息；其中，所述重定位请求确认消息中携带本基站在重定位后接收数据包的用户面地址；所述重定位请 求消息中携带终端在所述源基站上的上下文信息；
    所述重定位执行模块设置成：收到所述源基站发送的主用户面功能的上下文信息后，执行所述主用户面功能。
  28. 如权利要求27所述的实现蜂窝网络重定位的基站，其中：
    所述源基站为用户面主基站，所述目标基站为辅基站；
    所述辅基站的辅用户面功能在重定位过程中保持执行；如所述源基站包含辅用户面功能，则所述源基站的辅用户面功能在重定位过程中保持执行。
  29. 如权利要求28所述的实现蜂窝网络重定位的基站，其中：
    对于上行无线承载，所述主用户面功能包括：对来自终端且经过辅用户面功能处理后的数据包进行重排序；对于下行无线承载，所述主用户面功能包括：对来自上层网络的数据包进行编号；
    所述辅用户面功能包括以下功能的一种或多种：安全功能、无线链路控制RLC协议栈功能、媒体访问控制MAC协议栈功能和物理层PHY协议栈功能。
  30. 如权利要求29所述的实现蜂窝网络重定位的基站，其中：
    对于上行无线承载，所述源基站发送给所述目标基站的主用户面功能的上下文信息，包括：所述主用户面功能对数据包进行重排序的上下文信息；
    对于下行无线承载，所述源基站发送给所述目标基站的主用户面功能的上下文信息，包括：所述主用户面功能为数据包进行编号的上下文信息。
  31. 如权利要求27或28或29或30所述的实现蜂窝网络重定位的基站，其中，终端在所述源基站上的上下文信息，包括以下信息的至少一种：
    主用户面功能的配置信息、终端的能力信息、上层网络控制面和用户面的地址信息、上层网络发给源基站的承载配置信息、重定位以后的辅基站接收数据包的用户面地址。
  32. 如权利要求27或28或29或30所述的实现蜂窝网络重定位的基站， 其中：
    所述请求接收及处理模块还设置成：对于上行无线承载，在向所述源基站返回所述重定位请求确认消息后，将本基站已经处理后的数据包缓存在本地；和/或接收其他基站辅用户面功能处理后的数据包。
  33. 如权利要求30所述的实现蜂窝网络重定位的基站，其中，所述重定位执行模块收到所述源基站发送的主用户面功能的上下文信息后，设置成按照如下方式执行所述主用户面功能：
    对于上行无线承载，收到所述源基站发送的主用户面功能的上下文信息后，根据所述重排序上下文对数据包进行重排序，并且依序将数据包发送给上层网络；和/或，
    对于下行无线承载，收到所述源基站发送的主用户面功能的上下文信息后，对数据包进行编号，将编号后的数据包发送给包含辅用户面功能的基站的用户面地址。
  34. 如权利要求27或28或29所述的实现蜂窝网络重定位的基站，该基站还包括路由切换处理模块，其中：
    所述路由切换处理模块设置成：如重定位后的控制面主基站是本基站，则在向所述源基站返回用于确认本基站是重定位后的主基站的重定位请求确认消息后，发起用于通知上层网络将路由切换至所述目标基站的路由切换流程；如重定位后的控制面主基站是其他基站，则在向所述源基站返回用于确认本基站是重定位后的主基站的重定位请求确认消息后，通知所述其他基站发起用于通知上层网络将路由切换至所述目标基站的路由切换流程。
PCT/CN2015/090283 2015-05-07 2015-09-22 一种实现蜂窝网络重定位的方法和基站 WO2016176952A1 (zh)

Priority Applications (4)

Application Number Priority Date Filing Date Title
EP15891203.0A EP3294003B1 (en) 2015-05-07 2015-09-22 Cellular network relocation method and base station
EP20175013.0A EP3720186A1 (en) 2015-05-07 2015-09-22 Cellular network relocation method and user equipment
US15/572,309 US10582431B2 (en) 2015-05-07 2015-09-22 Cellular network relocation method and base station
ES15891203T ES2807792T3 (es) 2015-05-07 2015-09-22 Método de reubicación de red móvil y estación base

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN201510229559.6A CN106211244B (zh) 2015-05-07 2015-05-07 一种实现蜂窝网络重定位的方法和基站
CN201510229559.6 2015-05-07

Publications (1)

Publication Number Publication Date
WO2016176952A1 true WO2016176952A1 (zh) 2016-11-10

Family

ID=57218454

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2015/090283 WO2016176952A1 (zh) 2015-05-07 2015-09-22 一种实现蜂窝网络重定位的方法和基站

Country Status (5)

Country Link
US (1) US10582431B2 (zh)
EP (2) EP3294003B1 (zh)
CN (1) CN106211244B (zh)
ES (1) ES2807792T3 (zh)
WO (1) WO2016176952A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108990101A (zh) * 2017-05-31 2018-12-11 宏达国际电子股份有限公司 处理双连接中次要节点改变的装置及方法

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108282819B (zh) * 2017-01-06 2020-02-21 电信科学技术研究院 一种减少中断时延的方法、装置及用户设备
CN108282830B (zh) * 2017-01-06 2019-09-17 电信科学技术研究院 一种网络实体切换的方法、终端及网络实体设备
GB2560756B (en) * 2017-03-24 2021-08-11 Tcl Communication Ltd Data transmission in RRC inactive state
CN108632904B (zh) 2017-03-24 2019-09-17 电信科学技术研究院 一种通信方法及设备
CN113038455B (zh) 2017-07-20 2024-04-12 华为技术有限公司 切换方法、设备及系统
WO2019015627A1 (zh) * 2017-07-20 2019-01-24 华为技术有限公司 切换方法、设备及系统
EP3657855B1 (en) * 2017-08-21 2022-10-05 Samsung Electronics Co., Ltd. Method and system for communication in wireless communication network
CN113873601A (zh) 2018-03-14 2021-12-31 中兴通讯股份有限公司 地址协同方法、装置、基站、smf网元及存储介质
CN111163421B (zh) * 2020-03-05 2021-01-12 京信通信系统（中国）有限公司 小基站覆盖系统

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101536576A (zh) * 2006-11-07 2009-09-16 高通股份有限公司 用于无线通信系统中服务无线网络子系统重定位的方法和装置
CN101765172A (zh) * 2010-01-21 2010-06-30 华为技术有限公司 接入点网络中的切换方法和装置
US20150071248A1 (en) * 2013-09-11 2015-03-12 Michael Faerber Techniques for relocating a backhaul channel between a small cell base station and a macro cell base station

Family Cites Families (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2610444C (en) 2005-06-01 2014-09-30 Huawei Technologies Co., Ltd. Method and system for providing quality of service assurance in wireless communication system
CN1992957B (zh) * 2005-12-30 2011-06-22 华为技术有限公司 无线接入网络架构及其实时业务无损迁移的实现方法
US20070254667A1 (en) * 2006-04-28 2007-11-01 Joanna Jokinen Inter-MME handover in evolved communication systems
CN101128043B (zh) * 2006-08-15 2011-02-02 华为技术有限公司 系统间切换或者改变时的数据处理方法
CN101784033B (zh) * 2009-01-15 2014-07-09 华为技术有限公司 切换数据转发处理方法、装置和系统
DK2622908T3 (en) * 2010-09-27 2017-03-06 ERICSSON TELEFON AB L M (publ) RELOCATION OF A SERVING GATEWAY ASSOCIATED WITH A USER DEVICE
CN102625405B (zh) * 2011-02-01 2017-07-14 南京中兴新软件有限责任公司 一种移动性管理方法、网关节点及核心网络
CN102843739B (zh) * 2011-06-24 2014-09-17 华为终端有限公司 在家庭基站之间进行切换的方法、装置及系统
CN103313325B (zh) * 2012-03-09 2018-04-27 中兴通讯股份有限公司 切换方法及装置、数据处理方法及装置
JP5758351B2 (ja) * 2012-06-22 2015-08-05 株式会社Ｎｔｔドコモ 無線通信システム
EP2713653A1 (en) * 2012-09-28 2014-04-02 Alcatel Lucent User plane handover for heterogeneous networks
CN103945451A (zh) * 2013-01-22 2014-07-23 北京三星通信技术研究有限公司 一种解决用户面拥塞的方法
CN104378793B (zh) * 2013-08-12 2019-06-14 中兴通讯股份有限公司 一种切换方法、主控基站及受控基站
US9756531B2 (en) 2013-09-30 2017-09-05 Lg Electronics Inc. Method for determining radio resource control configuration in a wireless communication system supporting dual connectivity and apparatus thereof

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101536576A (zh) * 2006-11-07 2009-09-16 高通股份有限公司 用于无线通信系统中服务无线网络子系统重定位的方法和装置
CN101765172A (zh) * 2010-01-21 2010-06-30 华为技术有限公司 接入点网络中的切换方法和装置
US20150071248A1 (en) * 2013-09-11 2015-03-12 Michael Faerber Techniques for relocating a backhaul channel between a small cell base station and a macro cell base station

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108990101A (zh) * 2017-05-31 2018-12-11 宏达国际电子股份有限公司 处理双连接中次要节点改变的装置及方法

Also Published As

Publication number Publication date
ES2807792T3 (es) 2021-02-24
US10582431B2 (en) 2020-03-03
CN106211244B (zh) 2021-01-22
EP3720186A1 (en) 2020-10-07
EP3294003A4 (en) 2018-06-13
CN106211244A (zh) 2016-12-07
EP3294003A1 (en) 2018-03-14
EP3294003B1 (en) 2020-06-24
US20180132150A1 (en) 2018-05-10

Similar Documents

Publication Publication Date Title
WO2016176952A1 (zh) 一种实现蜂窝网络重定位的方法和基站
US11076334B2 (en) Data forwarding method, device, and communications system
CN112738858B (zh) 切换的方法和设备
WO2018219039A1 (zh) 一种移动切换的管理方法、装置、设备及存储介质
CN109088714B (zh) 用于传递安全密钥信息的系统和方法
WO2018188613A1 (zh) 一种移动性管理方法、接入网设备和终端设备
JP6405454B2 (ja) ユーザー装置の基地局ハンドオーバ方法及び基地局、ユーザー装置
WO2018165996A1 (zh) 切换方法和装置
WO2016119109A1 (zh) 一种切换装置及方法
US10721658B2 (en) Mobility management method, apparatus, and system
WO2021027931A1 (zh) 小区切换方法以及用户设备
CN112203362A (zh) 减少移动中断的方法和用户设备
US20150215838A1 (en) Method and apparatus for mobility control in heterogenous network
US9572075B2 (en) Method, apparatus, and computer program product for perform handover in a heterogenous network
JP6290413B2 (ja) 接続管理方法及びアクセスネットワークエレメント
WO2010022560A1 (zh) 用于无线网络中组切换的方法和设备
WO2016101586A1 (zh) 一种基站切换方法、系统及相关装置、存储介质

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 15891203

Country of ref document: EP

Kind code of ref document: A1

WWE Wipo information: entry into national phase

Ref document number: 15572309

Country of ref document: US

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2015891203

Country of ref document: EP