WO2015074598A1 - 无线通信系统以及用在无线通信系统中的方法 - Google Patents

无线通信系统以及用在无线通信系统中的方法 Download PDF

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Publication number
WO2015074598A1
WO2015074598A1 PCT/CN2014/091867 CN2014091867W WO2015074598A1 WO 2015074598 A1 WO2015074598 A1 WO 2015074598A1 CN 2014091867 W CN2014091867 W CN 2014091867W WO 2015074598 A1 WO2015074598 A1 WO 2015074598A1
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WO
WIPO (PCT)
Prior art keywords
base station
data
user equipment
admission control
bearer
Prior art date
Application number
PCT/CN2014/091867
Other languages
English (en)
French (fr)
Inventor
覃忠宾
Original Assignee
索尼公司
覃忠宾
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
Priority to RU2015138714/08A priority Critical patent/RU2598320C1/ru
Priority to MX2015014679A priority patent/MX344416B/es
Application filed by 索尼公司, 覃忠宾 filed Critical 索尼公司
Priority to BR112016008155-2A priority patent/BR112016008155B1/pt
Priority to CA2930104A priority patent/CA2930104C/en
Priority to ES14864882T priority patent/ES2712879T3/es
Priority to EP18205751.3A priority patent/EP3474598A1/en
Priority to EP14864882.7A priority patent/EP3001764B1/en
Priority to AU2014352364A priority patent/AU2014352364B2/en
Priority to KR1020157025890A priority patent/KR101611498B1/ko
Priority to KR1020167008978A priority patent/KR101749010B1/ko
Priority to JP2015557329A priority patent/JP6107974B2/ja
Priority to US14/764,027 priority patent/US9717030B2/en
Publication of WO2015074598A1 publication Critical patent/WO2015074598A1/zh
Priority to ZA2015/08105A priority patent/ZA201508105B/en
Priority to US15/296,690 priority patent/US9843978B2/en
Priority to AU2016262685A priority patent/AU2016262685B2/en

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    • 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
    • H04W36/0027—Control or signalling for completing the hand-off for data sessions of end-to-end connection for a plurality of data sessions of end-to-end connections, e.g. multi-call or multi-bearer end-to-end data connections
    • 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
    • H04W36/0061—Transmission or use of information for re-establishing the radio link of neighbour cell information
    • 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
    • H04W36/24—Reselection being triggered by specific parameters
    • H04W36/26—Reselection being triggered by specific parameters by agreed or negotiated communication parameters
    • H04W36/28—Reselection being triggered by specific parameters by agreed or negotiated communication parameters involving a plurality of connections, e.g. multi-call or multi-bearer connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/15—Setup of multiple wireless link connections
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/10—Connection setup
    • H04W76/19—Connection re-establishment
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W76/00—Connection management
    • H04W76/30—Connection release
    • H04W76/34—Selective release of ongoing connections

Definitions

  • the present disclosure relates to the field of wireless communications, and more particularly to a wireless communication system and method for use in a wireless communication system.
  • an object of the present disclosure is to provide a wireless communication system and a method for use in a wireless communication system capable of realizing a wireless communication system in which a plurality of base stations simultaneously perform wireless data connection with a user equipment through different carriers. If some conditions are met, the user equipment is triggered to transfer some or all of the radio bearers between some of the base stations to other base stations. In this way, the user equipment can be guaranteed to obtain an ideal quality of service from the base station, and the transmission efficiency of the uplink and downlink data is effectively improved.
  • a wireless communication system includes: a first base station; a second base station; a third base station; and a user equipment, wherein the first base station and the second base station pass different carriers and user equipments Performing a wireless data connection, and wherein the triggering node triggers a transfer process in a case of determining that a predetermined transfer condition of the second base station to transfer the service provided by the user equipment to the third base station is satisfied, so that the user equipment releases the wireless communication with the second base station Data connection, establishing a wireless data connection with the third base station, so that the first base station and the third base station perform wireless data connection with the user equipment through different carriers, wherein at least a part of the original service provided by the second base station is transferred Move to the third base station.
  • the transfer process may also cause a portion of the traffic originally provided by the second base station to be transferred to the first base station.
  • the triggering node may be the first base station or the second base station.
  • the triggering node sends a transfer request to the third base station if the predetermined transition condition is satisfied according to the received mobility measurement result of the serving carrier of the second base station, the third base station Performing first admission control according to the transfer request and issuing a transfer response to the first base station and/or the second base station to notify the result of the first admission control, wherein the transfer response includes at least one of: the third base station is capable of targeting the user Which part of the device carries the data communication, the dedicated preamble required for the third base station to synchronize access, the system information of the carrier that the user equipment communicates with the third base station, and the communication between the user equipment and the third base station. Configuration information of the control plane protocol.
  • the first base station performs second admission control according to the result of the first admission control and notifies the second base station of the result of the second admission control.
  • the first base station or the second base station after learning the final result of the first admission control or the second admission control, sends a notification message to the user equipment according to the final result and the feedback information of the third base station.
  • the notification message includes at least one of the following: the part of the user equipment can communicate with the first base station, and the third base station can communicate with the part of the data equipment of the user equipment, the third base station a dedicated preamble required for synchronization access, system information of a carrier communicated by the user equipment with the third base station, and configuration information of a control plane protocol for establishing communication between the user equipment and the third base station, and the user equipment is receiving
  • the notification message the data bearer that cannot be accepted by the first base station and the third base station is released, and the wireless data connection with the second base station is released and the synchronous access operation to the third base station is performed.
  • the second base station is controlled according to the first admission.
  • a data forwarding operation is performed to forward data of the first data bearer receivable by the third base station to the third base station, and data forwarding operations are also performed according to the result of the second admission control to Forwarding data of the second data bearer receivable by the base station to the first base station, and notifying the first base station or the second base station of the route corresponding to the second data bearer by the core network Switch to the first base station.
  • the third base station notifies the core network to switch the route corresponding to the first data bearer to the third base station; otherwise, if the user equipment synchronizes with the third base station If the user fails, the user equipment notifies the first base station, and the first base station notifies the second base station and the third base station after the third admission control, so that the data of the third data bearer receivable by the first base station in the first data bearer is enabled.
  • the first base station Forwarded to the first base station, and the first base station notifies the core network to switch the route corresponding to the third data bearer to the first base station and release the core network corresponding to the data bearer that the first base station cannot accept in the first data bearer
  • the bearer simultaneously informs the user equipment to release the data bearer that the first base station in the first data bearer cannot accept.
  • the first base station stops after confirming the first admission control or completing the second admission control.
  • the second base station forwards the data, and the second base station performs a data forwarding operation according to the result of the first admission control to forward data of the first data bearer receivable by the third base station to the third base station, and further according to the second admission
  • a data forwarding operation is performed to forward data of the second data bearer receivable by the first base station to the first base station.
  • the first base station After completing the confirmation of the first admission control, the first base station performs a data forwarding operation to forward data of the first data bearer to the third base station, or the first base station receives the user equipment and the third base station.
  • the data forwarding operation is performed after the synchronous access successful message to forward the data of the first data bearer to the third base station.
  • the user equipment notifies the first base station, the first base station stops forwarding data to the third base station, and notifies the first base station after completing the third admission control.
  • the second base station and the third base station are configured to forward data of the third data bearer receivable by the first base station in the first data bearer to the first base station, and the data bearer that is not receivable by the first base station in the first data bearer is Release, while notifying the user equipment to release the data bearer that the first base station in the first data bearer cannot accept.
  • the third base station further notifies the core network to modify The first data receivable that the three base stations can bear corresponds to the core network bearer, so that the data of the first data bearer is directly routed to the third base station.
  • the second base station if the data of the first base station is forwarded by the second base station, the second base station performs a data forwarding operation according to the result of the first admission control to enable the third base station to Receiving data of the first data bearer forwarded to the third base station, and according to the second admission control As a result of the system, a data forwarding operation is performed to forward data of the second data bearer receivable by the first base station to the first base station.
  • the third base station triggers the core network to perform route switching to directly route data sent from the core network to the second base station to the third base station, and complete the third of the route switching.
  • the base station begins to forward the data of the downlink bearer transmitted via the first base station to the first base station, and the second base station releases the information related to the user equipment and its service after completing the data forwarding operation.
  • the user equipment fails to synchronize access with the third base station, the user equipment notifies the first base station, and the first base station notifies the second base station and the third base station after the third admission control, so that the second base station is Transmitting, to the first base station, data of the third data bearer receivable by the first base station in the first data bearer and data of the original data of the first base station, and notifying the user equipment, and the second base station stops after learning the failure Forwarding data to the third base station.
  • the first base station or the second base station notifies the core network to forward to the first via the second base station.
  • the route corresponding to the data of the base station is switched to the first base station, and the core network bearer corresponding to the data bearer that is not receivable by the first base station in the first data bearer is released, and the user equipment is notified to release the first base station in the first data bearer that cannot be accepted. Data hosting.
  • a method for use in a wireless communication system comprising a first base station, a second base station, a third base station, and a user equipment, wherein the first base station and the second base station pass Performing a wireless data connection between the different carriers and the user equipment
  • the method comprising: a determining step, configured by the triggering node, determining whether the predetermined transfer condition of the second base station to transfer the service provided by the user equipment to the third base station is satisfied; and triggering, using
  • the transfer process is triggered to enable the user equipment to release the wireless data connection with the second base station, establish a wireless data connection with the third base station, and thereby the first base station and the third base station
  • a wireless data connection is made to the user equipment over different carriers, wherein at least a portion of the traffic originally provided by the second base station is transferred to the third base station.
  • a storage medium comprising machine readable program code, when the program code is executed on the information processing device, the program code causes the information processing device to perform the following steps: determining a step of determining, by the triggering node, whether a predetermined transfer condition of the second base station to transfer the service provided by the user equipment to the third base station is satisfied; and a triggering step, in the case of determining that the predetermined transfer condition is satisfied, triggering the transfer process to
  • the user equipment is released from the wireless data connection with the second base station, and the wireless data connection with the third base station is established, so that the first base station and the third base station perform wireless data connection with the user equipment through different carriers, where Passing at least a portion of the original service provided by the second base station to the third base station, wherein the first base station, the second base station, the third base station, and the user equipment are included in the wireless communication system, and the first base station and the second base station Wireless data connection to user equipment through different carriers.
  • a program product comprising machine executable instructions which, when executed on an information processing device, cause the information processing device to perform the following steps: Determining, by the triggering node, whether the predetermined transition condition is met; and a triggering step, in a case of determining that the predetermined transfer condition that the second base station provides the service provided by the user equipment to the third base station is triggered, triggering the transfer process, so that the user equipment Freeing a wireless data connection with the second base station, establishing a wireless data connection with the third base station, so that the first base station and the third base station perform a wireless data connection with the user equipment through different carriers, wherein the original base station is caused by the second base station At least a portion of the provided service is transferred to the third base station, wherein the first base station, the second base station, the third base station, and the user equipment are included in the wireless communication system, and the first base station and the second base station pass different carriers and users
  • the device makes a wireless data connection.
  • FIG. 1 is a schematic block diagram showing a wireless communication system in accordance with an embodiment of the present disclosure
  • FIG. 2 is a schematic diagram showing an example scenario in which a transfer process is triggered by a first base station as a trigger node, in accordance with an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram showing an example scenario in which a transfer process is triggered by a second base station as a trigger node, in accordance with an embodiment of the present disclosure
  • FIG. 4 is a diagram showing that data at the first, second, and third base stations are routed directly from the core network and synchronized by the user equipment with the third base station before and after completion of the transfer process, according to an embodiment of the present disclosure. Schematic diagram of an example scenario in the case where the access is successful;
  • FIG. 5 is a diagram showing that data at a second base station is directly from a core network according to an embodiment of the present disclosure. And a schematic diagram of an example scenario in a case where synchronous access of the user equipment and the third base station fails;
  • FIG. 6A is a diagram showing an example scenario in a case where data of a second base station and a third base station are forwarded by a first base station and synchronous access of a user equipment with a third base station is successful, according to an embodiment of the present disclosure.
  • 6B is a diagram showing another example in a case where data of the second base station and the third base station are forwarded by the first base station and synchronization access of the user equipment with the third base station is successful, according to an embodiment of the present disclosure.
  • 6C is a diagram showing that data at a second base station is forwarded by a first base station, and data of a third base station is directly routed by the core network after the transfer process is triggered, and the user equipment is in accordance with an embodiment of the present disclosure.
  • FIG. 7 is a schematic diagram showing an example scenario in a case where data of a second base station is forwarded by a first base station and synchronous access of a user equipment with a third base station fails, according to an embodiment of the present disclosure
  • FIG. 8 is a schematic diagram showing an example scenario in a case where data of a first base station is forwarded by a second base station and synchronous access of a user equipment with a third base station is successful, according to an embodiment of the present disclosure
  • FIG. 9 is a schematic diagram showing an example scenario in a case where data of a first base station is forwarded by a second base station and synchronous access of a user equipment with a third base station fails, according to an embodiment of the present disclosure
  • FIG. 10 is a block diagram showing a functional configuration example of a first base station as a connection holding node according to an embodiment of the present disclosure
  • FIG. 11 is a block diagram showing a functional configuration example of a first base station as a connection holding node, according to another embodiment of the present disclosure.
  • FIG. 12 is a block diagram showing a functional configuration example of a second base station as a connection transfer source node, according to an embodiment of the present disclosure
  • FIG. 13 is a block diagram showing a functional configuration example of a second base station as a connection transfer source node, according to another embodiment of the present disclosure.
  • FIG. 14 is a block diagram showing a functional configuration example of a third base station as a connection transfer destination node, according to an embodiment of the present disclosure
  • FIG. 15 is a block diagram showing a functional configuration example of a user equipment according to an embodiment of the present disclosure.
  • FIG. 16 is a flowchart illustrating an example of a procedure of a method for use in a wireless communication system according to an embodiment of the present disclosure
  • FIG. 17 is a block diagram showing an example structure of a personal computer which is an information processing device which can be employed in an embodiment of the present disclosure.
  • FIG. 1 is a schematic block diagram showing a wireless communication system in accordance with an embodiment of the present disclosure.
  • a wireless communication system 100 in accordance with an embodiment of the present disclosure may include a first base station 102, a second base station 104, a third base station 106, and a user equipment 108.
  • the first base station 102 and the second base station 104 perform wireless data connection with the user equipment 108 through different carriers, and the triggering node determines to satisfy the predetermined transfer of the service provided by the second base station 104 to the user equipment 108 to the third base station 106.
  • the transfer process is triggered in the event that the user equipment 108 releases the wireless data connection with the second base station 104, establishing a wireless data connection with the third base station 106, such that the first base station 102 and the third base station 106 pass different
  • the carrier is in wireless data connection with user equipment 108, wherein at least a portion of the traffic originally provided by second base station 104 is transferred to third base station 106.
  • the predetermined transition condition for the second base station 104 to transfer the service provided to the user equipment 108 to the third base station 106 includes one or more of the following factors: the third base station 106 is higher than the quality of service of the second base station 104 by a predetermined threshold; The quality of service of the base station 106 is above a predetermined threshold; and the quality of service of the second base station 104 is below a first predetermined threshold and the quality of service of the third base station 106 is higher than the second predetermined Threshold; and so on. It should be understood that the above-described predetermined transition condition is described on the assumption that the object to be transferred has been determined from the first base station 102 and the second base station 104.
  • the predetermined transition condition may further include, for example, one of the base stations than the other base station The quality of service is high.
  • the triggering node when determining an object to be transferred from the two base stations, it is necessary to report the measurement results of the service carriers of the two base stations to the trigger node, and then the triggering node will be based on the base station type (for example, the master node/slave node) , macro base station/low power node, etc.), channel quality or load conditions, etc. to determine which base station to begin the transfer process for.
  • the base station type for example, the master node/slave node
  • channel quality or load conditions etc.
  • the base station with the worst channel quality is determined as the object to be transferred, and begins first. The transfer process for this base station.
  • the base station having a heavier load is determined as the object to be transferred, and the handover procedure for the base station is first started.
  • the transfer process also causes a portion of the traffic originally provided by the second base station 104 to be transferred to the first base station 102.
  • first base station 102 is not limited thereto, but may be a group of base stations including a plurality of first base stations, for example, joint processing (Joint Processing)
  • Joint Processing Joint Processing
  • a plurality of cooperating base stations in the technology such that during the transfer process, a portion of the traffic originally provided by the second base station 104 can also be transferred to one or more of the first base stations in the set of base stations.
  • the quality of service of the plurality of first base stations is measured in units of cells, for example, in the case of coordinated multi-point transmission, a plurality of base station cooperative carriers can be regarded as one cell to measure multiple cooperations.
  • the quality of service of the base station is measured in units of cells, for example, in the case of coordinated multi-point transmission, a plurality of base station cooperative carriers can be regarded as one cell to measure multiple cooperations.
  • the first base station 102 since the first base station 102 always maintains a wireless data connection with the user equipment, the services provided by the second base station 104 are transferred, and at least the services originally provided by the second base station 104 are at least A portion is transferred to the third base station 106, so in some embodiments of the invention, the first base station 102 may also be referred to as a connection holding node, the second base station 104 may also be referred to as a connection transfer source node, and the third base station 106 may also be referred to as a connection transfer destination node.
  • the trigger node is a serving node to which the user equipment 108 is currently connected, and may be, for example, the connection holding node first base station 102 or the connection transfer source node second base station 104.
  • first, second and third as used herein are only In order to make a distinction for the description and not to limit, for example, when the first base station 102 conforms to the feature of the connection transfer source node or the connection transfer destination node, it may of course also be a connection transfer source node or a connection transfer destination node, the same applies to The second base station 104 and the third base station 106.
  • the triggering node determines to satisfy the predetermined transition condition according to the received mobility measurement result of the service carrier of the at least second base station 104 and the optional first base station 102 and the third base station 106, to the third
  • the base station 106 sends a transfer request including related information of the first base station and the second base station, and the third base station 106 performs a first admission control according to the transfer request and issues a transfer response to notify the result of the first admission control, wherein
  • the third base station 106 may directly return a transfer response to the trigger node, or may issue a transfer response to another service node to which the user equipment 108 is connected.
  • the transfer response may include which part of the data equipment bearer of the user equipment 108 the third base station 106 can communicate, the dedicated preamble required for the third base station 106 to synchronize access, and the carrier that the user equipment 108 communicates with the third base station 106.
  • the first base station 102 performs the second admission control according to the result of the first admission control and notifies the result of the second admission control To the second base station 104.
  • the first base station 102 or the second base station 104 after learning the final result of the first admission control or the second admission control, issues a notification message to the user equipment 108 according to the final result and the transfer response of the third base station 106 to notify The user equipment 108 performs a transfer process, the notification message including at least one of the following: the first base station 102 can communicate with which part of the data equipment of the user equipment, and the third base station 106 can communicate with the data equipment bearer of the user equipment 108, The third base station 106 synchronizes access to the required dedicated preamble, system information of the carrier in which the user equipment 108 communicates with the third base station 106, and a control plane protocol for establishing communication between the user equipment 108 and the third base station 106.
  • the user equipment 108 releases the data bearer that cannot be accepted by the first base station 102 and the third base station 106 after receiving the notification message, releases the wireless data connection with the second base station 104, and performs a synchronous access operation to the third base station 106. .
  • the trigger node may be the first base station 102 or the second base station 104.
  • FIG. 2 is a diagram showing an embodiment according to the present disclosure.
  • FIG. 3 is a schematic diagram showing an example scenario in which a second base station acts as a trigger node to trigger a transfer process, in accordance with an embodiment of the present disclosure.
  • the user equipment 108 can transmit the mobility measurement result to the second base station 104, and then the second base station 104 forwards the mobility measurement result to the first A base station 102, as indicated by the solid arrows in FIG. 2, serves as a reference for the first base station 102 to trigger the transfer process.
  • the advantage of this example is that the modification of the existing standard (the mobile device measurement result of the serving base station directly reported by the user equipment to the serving base station) is reduced.
  • user equipment 108 may also transmit mobility measurements for the second carrier 104's serving carrier (including at least the primary carrier) to the first base station 102, for example, as "measurement reports," as indicated by the dashed arrows in FIG.
  • mobility measurements for the second carrier 104's serving carrier (including at least the primary carrier) to the first base station 102, for example, as "measurement reports," as indicated by the dashed arrows in FIG.
  • An advantage of this example is that the user equipment 108 can directly transmit a measurement report on the second base station 104 service carrier to the first base station 102, thereby saving information interaction between the second base station 104 and the first base station 102.
  • the first base station 102 may, after determining that the predetermined transition condition is satisfied according to the information of the received mobility measurement result, issue a transfer request to the third base station 106, for example, "transfer request", and then the third base station 106 according to the transfer request While the first admission control is performed, and the first base station 102 is notified of the transfer request by, for example, a "transfer response" to notify the first base station 102 of the result of the first admission control, the result of the first admission control indicates a third Whether the base station 106 can accept all data bearers between the user equipment 108 and the second base station 104 or which part of the data bearer can be accepted.
  • the first base station 102 or the third base station 106 notifies the second base station 104 of the result of the first admission control by, for example, "transfer notification", and the first base station 102 or the second base station 104 according to the result and the third
  • the transfer response of the base station 106 for example, the "transfer confirmation” is notified to the user equipment 108 to perform the transfer process.
  • the specific content included in the notification message "transfer confirmation" has been described above, and details are not described herein again.
  • the first base station 102 can be based on the received " The second admission control is performed by the first admission control result contained in the Transfer Response, as shown by the dashed box in FIG. It will be appreciated that by performing second admission control by the first base station 102 to transfer at least a portion of the data bearers that the third base station 106 is unable to accept to the first base station 102, the user equipment 108 can be further assured of good quality of service.
  • the user equipment 108 may be directly notified after the first admission control to release the service that the third base station 106 cannot accept without performing the second admission control of the first base station 102.
  • the second base station 104 releases the wireless data bearer that the third base station 106 and the first base station 102 cannot transmit through the second base station 104, and notifies the core.
  • the network releases the core network bearer corresponding to the wireless data bearer.
  • the second base station 104 may be notified of the final result regarding the first admission control and the second admission control by the first base station 102 after performing the second admission control, for example, "transfer notification", and then by the first A base station 102 or a second base station 104 notifies the user equipment 108 of, for example, a "transfer acknowledgment" based on the end result, such that the data bearer receivable by the third base station 106 can be transferred to the third base station and the data receivable by the first base station 102 The bearer is transferred to the first base station 102.
  • the user equipment 108 After receiving the "transfer acknowledgement" notification message, the user equipment 108 releases the traffic that cannot be accepted by the first base station 102 and the third base station 106, releases the wireless data connection with the second base station 104, and performs the third base station 106. Synchronous access operation.
  • the user equipment 108 since the trigger node at this time is the second base station 104, the user equipment 108 only needs to notify the second base station 104 of its carrier mobility measurement result, and the second base station 104 determines that the reservation is satisfied according to the measurement result.
  • a transfer request is issued to the third base station 106 to trigger the transfer process.
  • the third base station 106 then sends a response message "Transfer Response" to the transfer request to the second base station 104 after performing the first admission control to inform the second base station 104 of the result of the first admission control.
  • the result may be notified to the first base station 102 by the second base station 104 or the third base station 106, and the second base station 104 issues a notification message to the user equipment 108 with a "transfer acknowledgement" according to the received "transfer response".
  • the first base station 102 can also perform second admission control based on the received result of the first admission control, in particular, the third base station 106 received by the second base station 104.
  • the "transfer response" indicates that when the third base station 106 is unable to accept all data bearers between the user equipment 108 and the second base station 104, the second base station 104 issues a "transfer request" to the first base station 102 for the data bearer that the third base station 106 cannot accept.
  • the first base station 102 performs the second admission control according to the "transfer request", and notifies the second base station 104 of the final result of the admission control by, for example, "transfer response", after which the second base station 104 refers to the user equipment according to the final result. 108 issued a notice.
  • the "transfer response" sent by the first base station includes which portion of the user equipment 108 the first base station 102 is capable of communicating with.
  • FIG. 2 It can be seen from the comparison of FIG. 2 and FIG. 3 that the scenarios of the transfer process in the two cases are similar. The only difference is that the base stations that are the trigger nodes are different, resulting in different signaling transceiver nodes and timings. Therefore, the portion not described in detail in FIG. 3 can be referred to FIG. 2, and the description thereof will not be repeated here.
  • FIG. 4 is a diagram showing that data at the first, second, and third base stations are routed directly from the core network and synchronized by the user equipment with the third base station before and after completion of the transfer process, according to an embodiment of the present disclosure. Schematic diagram of an example scenario in the case of successful access.
  • the second base station 104 is based on the received first admission.
  • a data forwarding operation is performed to forward data of the first data bearer receivable by the third base station 106 to the third base station 106, and also perform a data forwarding operation according to the result of the second admission control to
  • the data of the second data bearer receivable by the base station 102 is forwarded to the first base station 102, and the first base station 102 or the second base station 104 notifies the core network to switch the route corresponding to the second data bearer to the first base station 102.
  • the result of the first admission control indicates that the third base station 106 is capable of accepting all data bearers, then only the data of the first data bearer received by the third base station 106 needs to be forwarded, otherwise it is necessary to simultaneously simultaneously to the first base station. 102 forwards the data carried by the second data received by it.
  • the third base station 106 After the data forwarding operation, as shown in FIG. 4, if the synchronous access of the user equipment 108 to the third base station 106 is successful, the third base station 106 notifies the core network to switch the route corresponding to the first data bearer to the third base station. 106. Specifically, the third base station 106 may issue, for example, a “routing handover request” to the mobility management entity (MME), and after receiving the request, the mobility management entity issues, for example, “modify bearer request” to the gateway, and the gateway receives the request.
  • MME mobility management entity
  • the handover downlink routing operation is then performed such that the data of the first data bearer receivable by the third base station 106 is directly routed to the third base station 106, and the end flag is sent to the second base station 104 to inform the third base station 104 to forward to the third base station 104.
  • the gateway issues, for example, a "Modify Bearer Response" to the mobility management entity, and after receiving the response, the mobility management entity issues, for example, "Route Switching Confirmation" to the third base station 106 as an acknowledgment of the routing switch request to notify the core
  • the route switching operation of the network is completed.
  • the third base station 106 can then notify the second base station 104 to release the relevant user equipment information, and the second base station 104 can release the resources associated with the user equipment 108 and its services after receiving the notification.
  • the user equipment 108 will notify the first base station 102 that the third base station 102 performs the third admission control to perform the first data bearer.
  • Admission control notifying the second base station 104 and the third base station 106 after the third admission control to notify the synchronization access failure and causing the data of the third data bearer receivable by the first base station 102 in the first data bearer to be forwarded Up to the first base station 102, and the first base station 102 also notifies the core network to switch the route corresponding to the third data bearer to the first base station 102, while the first base station 102 notifies the user equipment 108 which data can pass through the first base station 102.
  • the carrier transmits and which data needs to be released, and notifies the second base station 104 and the third base station 106 which wireless data bearers need to be released, and notifies the core network to release the core network bearer corresponding to the wireless data bearer.
  • the core network is notified to switch its corresponding route to the first base station 102, and for the first data bearer determined according to the result of the first admission control performed by the third base station 106, if the user equipment 108 is connected to the third base station If the synchronous access of 106 is successful, the core network is notified to switch the route corresponding to the first data bearer to the third base station 106, and if the synchronous access fails, the first base station 102 performs the third admission control for the first data bearer.
  • the third data carries the corresponding service, and the part of the service is provided by the first base station 102 at this time.
  • the user equipment 108 needs to be notified that the third data service bearer needs to go to the first base station 102 for transmission, and release the data bearer that the first base station 102 cannot accept through the third admission control.
  • 6A is a diagram illustrating an example in a case where data of the second base station and the third base station are forwarded by the first base station and synchronization access of the user equipment with the third base station is successful, according to an embodiment of the present disclosure.
  • FIG. 6B is a diagram illustrating a case where data of the second base station and the third base station is forwarded before the first base station is provided and the synchronous access of the user equipment and the third base station is successful, according to an embodiment of the present disclosure.
  • FIG. 6A is a diagram illustrating an example in a case where data of the second base station and the third base station are forwarded by the first base station and synchronization access of the user equipment with the third base station is successful, according to an embodiment of the present disclosure.
  • FIG. 6B is a diagram illustrating a case where data of the second base station and the third base station is forwarded before the first base station is provided and the synchronous access of the user equipment and the third base station is
  • FIG. 6C is a diagram illustrating that data at a second base station is forwarded through a first base station and data of a third base station is triggered after a transfer process is triggered, according to an embodiment of the present disclosure.
  • FIG. 7 is a diagram showing that the data at the second base station is provided according to an embodiment of the present disclosure.
  • a schematic diagram of another example scenario in the case where a base station turns forward and synchronous access by the user equipment to the third base station fails.
  • the first base station 102 stops after completing the confirmation of the first admission control or completing the second admission control.
  • Forwarding data to the second base station 104, and the second base station 104 performs a data forwarding operation based on the result of the first admission control to forward data of the first data bearer receivable by the third base station 106 to the third base station 106, and Data forwarding operations are also performed in accordance with the results of the second admission control to forward data of the second data bearer receivable by the first base station 102 to the first base station 102.
  • the first base station 102 Since the data of the second base station 104 is forwarded from the first base station 102 at this time, the first base station 102 also needs to perform a data forwarding operation to the third base station 106, and the first base station 102 can complete the first reception. After the acknowledgment of the control, the data forwarding operation is performed simultaneously with the second base station 104 to forward the data of the first data bearer to the third base station 106, regardless of whether the synchronous access of the user equipment 108 and the third base station 106 is successful, such as Figure 6A shows. Alternatively, the first base station 102 may also perform a data forwarding operation after learning that the synchronous access of the user equipment 108 and the third base station 106 is successful, as shown in FIG. 6B, which is more suitable for the first base station 102 and the second. The base station 104 simultaneously transmits a service for one data bearer.
  • the second base station 104 automatically releases resources related to the services of the user equipment 108 after completing the data forwarding operation.
  • the first base station 102 ceases to continue while performing the data forwarding operation for the first data bearer received by the third base station 106.
  • the second base station 104 In addition to forwarding data to the second base station 104, the second base station 104 also needs to transfer the data of the second data bearer received by the first base station 102 back to the first base station 102 for transmission.
  • the data of the second base station 104 is forwarded from the first base station 102, and the data of the third base station 106 is directly routed by the core network after the transfer process is triggered.
  • the operation of the core network side that is, the third base station 106 is involved.
  • the core network needs to be notified to modify the core network bearer corresponding to the first data bearer that the third base station 106 can accept.
  • the third base station 106 after the synchronous access of the user equipment 108 and the third base station 106 is successful, the third base station 106 also issues, for example, a “routing handover request” to the mobility management entity, and the mobility management entity sends the request to the gateway after receiving the request.
  • a “routing handover request” to the mobility management entity, and the mobility management entity sends the request to the gateway after receiving the request.
  • the route switching acknowledgement is used as an acknowledgement to the "route switching request", thereby notifying the third base station 106 that the route switching operation of the core network side is completed.
  • the user equipment 108 first notifies the first base station 102 that the first base station 102 is receiving the The data is not forwarded to the third base station 106 after the notification, and the first base station 102 notifies the second base station 104 and the third base station 106 after performing the third admission control to notify the synchronization access failure and causes the second base station 104 and the third base station to fail.
  • the 106 performing a data forwarding operation on the third data bearer receivable by the first base station 102 in the first data bearer, so that the data of the third data bearer receivable by the first base station 102 in the first data bearer is The data bearer that is transferred to the first base station 102 and that is not receivable by the first base station 102 in the first data bearer is released.
  • the first base station 102 notifies the user equipment 108 which data can be transmitted through the carrier of the first base station 102 and which data needs to be released.
  • the first base station 102 since the first base station 102 is responsible for forwarding data to other base stations in the wireless communication system in these scenarios, the success and failure of the synchronous access operation The routing switching operations of the core network are not involved.
  • first base station 102 and the second base station 104 are shown simultaneously performing data forwarding operations to the third base station 106 in FIG. 7, this is merely an example, and similar to FIG. 6B, the first base station 102 The data forwarding operation may not be performed to the third base station 106 first, and the present invention does not limit this.
  • FIGS. 8 and 9 An example scenario in the case where the data of the first base station is forwarded by the second base station will be described below with reference to FIGS. 8 and 9.
  • 8 is a schematic diagram showing an example scenario in a case where data of a first base station is forwarded by a second base station and synchronous access of a user equipment with a third base station is successful, according to an embodiment of the present disclosure
  • FIG. 9 is a schematic diagram showing an example scenario in a case where data of a first base station is forwarded by a second base station and synchronous access of a user equipment with a third base station fails, according to an embodiment of the present disclosure.
  • the second base station 104 performs a data forwarding operation according to the result of the first admission control to enable the third base station 106 to accept
  • the data carried by the data is forwarded to the third base station 106, and the data forwarding operation is performed according to the result of the second admission control to carry the second data bearer receivable by the first base station 102.
  • the data is forwarded to the first base station 102.
  • the third base station 106 triggers the core network to perform routing switching to directly route data sent from the core network to the second base station 104 to the third. After the base station 106 completes the route switching, the third base station 106 starts to forward the downlink bearer data transmitted by the first base station 102 to the first base station 102, and the second base station 104 releases the user equipment and its service after completing the data forwarding operation. Information.
  • the third base station 106 issues, for example, a “routing handover request” to the mobility management entity, and after receiving the request, the mobility management entity issues, for example, “modify the bearer request” to the gateway, and the gateway receives the request.
  • Performing a handover downlink routing operation after the request, thereby directly routing data of the first data bearer receivable by the third base station 106 to the third base station 106, and transmitting an end flag to the second base station 104, and then the second base station 104 will The end flag is forwarded to the first base station 102 to inform the first base station of the number of the last data packet forwarded by the second base station 104, after which the gateway issues, for example, a "Modify Bearer Response" to the mobility management entity, and the mobility management entity receives After the response, for example, a "route switching acknowledgement" is sent to the third base station 106 as an acknowledgment of the "routing handover request", thereby notifying the third base station 106 that the route switching operation of the core network side is completed.
  • the second base station 104 forwards to the first base station 102 after receiving the end flag of the traffic transmitted by the first base station 102, and then receives the third base station upon receipt. All resources associated with the user equipment 108 are released 106 and/or after the message "User Equipment Information Release" issued by the first base station 102.
  • the user equipment 108 notifies the first base station 102 that the first base station 102 notifies the second base station 104 after passing the third admission control.
  • the third base station 106 notifies the synchronization access failure and causes the second base station 104 and the third base station 106 to perform a data forwarding operation on the third data bearer receivable by the first base station 102 in the first data bearer, simultaneously notifying the user
  • the device 108 can transmit data through the carrier of the first base station 102 and which data needs to be released.
  • the data of the service transmitted by the first base station 102 can be still forwarded to the first base station 102 by the second base station 104 (ie, the data of the original service of the first base station 102, and the second Data carried by the data and data carried by the third data).
  • the second base station 104 since there is always an anchor base station (for example, the second base station 104 here) is responsible for data forwarding, it is only necessary to notify the anchor base station to perform data forwarding. Transfer it.
  • the first base station 102 or the second base station 104 may also notify the core network of all data received by the first base station 102.
  • the carried data performs a route switch to switch the route corresponding to the data forwarded to the first base station 102 via the second base station 104 to the first base station 102 and release the data bearer that is not receivable by the first base station 102 in the first data bearer.
  • the corresponding core network bearers and simultaneously informs the user equipment 108 to release the data bearers that the first base station 102 in the first data bearer cannot accept.
  • the first base station 102 performs In the case of admission control, the second base station 104 also performs a data forwarding operation to the first base station 102 for the data bearers received by the first base station 102.
  • FIG. 10 is a block diagram showing a functional configuration example of a first base station as a connection holding node, according to an embodiment of the present disclosure.
  • the first base station 1000 may include a measurement result receiving unit 1002, a determining unit 1004, a branch request transmitting unit 1006, and a branching response receiving unit 1008.
  • a measurement result receiving unit 1002 may include a measurement result receiving unit 1002, a determining unit 1004, a branch request transmitting unit 1006, and a branching response receiving unit 1008.
  • a branch request transmitting unit 1006 may include a branching response receiving unit 1008.
  • the measurement result receiving unit 1002 may be configured to receive, regarding the user equipment and the second base station from the user equipment or the second base station as the connection transfer source node, in a case where the first base station 1000 is a trigger node for triggering the above-described transfer process The mobility measurement result of the service carrier between the base stations.
  • the determining unit 1004 can be configured to receive the mobility received by the unit 1002 based on the measurement result.
  • the measurement result determines whether the predetermined transfer condition of the service provided by the second base station to the user equipment to the third base station is satisfied.
  • the transfer request transmitting unit 1006 may be configured to, when the determining unit 1004 determines that the predetermined transfer condition is satisfied, transmit a transfer request to the third base station that is the connection transfer destination node to trigger the user equipment to release the wireless data connection with the second base station. Establishing a wireless data connection with the third base station, so that the first base station and the third base station perform a wireless data connection with the user equipment through different carriers, wherein at least a part of the original service provided by the second base station is transferred to the first Three base stations.
  • the transfer response receiving unit 1008 can be configured to receive a transfer response from the third base station, the transfer response including a result of the admission control performed by the third base station.
  • the first base station 1000 may further include a first admission control execution unit 1010.
  • the first admission control execution unit 1010 may be configured to not be able to accommodate the third base station for the third base station if the admission control result included in the transfer response received by the transfer response receiving unit 1008 indicates that the third base station cannot accept all the data carriers of the second base station.
  • the admitted data bearer performs admission control so that the data bearer that the first base station 1000 can accept can be transferred to the first base station 1000.
  • the first base station 1000 may further include a notification unit 1012.
  • the notifying unit 1012 may be configured to notify the user equipment and/or the second base station of the result of the admission control performed by the third base station and the result of the admission control performed by the optional first base station.
  • the first base station 1000 may further include a data forwarding unit 1014.
  • the data forwarding unit 1014 can be configured to perform data forwarding on the third base station if the data of the second base station is forwarded by the first base station.
  • the data forwarding unit 1014 may perform data forwarding with the second base station after the basic signaling interaction of the transfer process is completed, or may also after receiving the message that the synchronous access of the user equipment and the third base station is successful. Perform data forwarding.
  • the first base station 1000 may further include a second admission control execution unit 1016.
  • the second admission control execution unit 1016 may be configured to perform admission control on a data bearer that should be accepted by the third base station in case the synchronous access of the user equipment and the third base station fails, so that the first base station is receivable The data bearer is transferred to the first base station 1000.
  • the first base station 1000 may further include a core network notification unit 1018.
  • the core network notification unit 1018 may be configured to notify the core network to switch the route corresponding to the data bearer received by the first base station to the first base station if the data of the second base station is directly from the core network.
  • first admission control execution unit 1010 the notification unit 1012, the data forwarding unit 1014, the second admission control execution unit 1016, and the core network notification unit 1018 described above with reference to FIG. 10 are all optional, in FIG. Shown in dashed boxes, and one skilled in the art can for example Combinations of one or more of the above-described respective units are contemplated as needed, and any such combinations are considered to fall within the scope of the present disclosure.
  • FIG. 11 is a block diagram showing a functional configuration example of a first base station as a connection holding node, according to another embodiment of the present disclosure.
  • the first base station 1100 shown in FIG. 11 is described above with reference to FIG. 10, except that the receiving unit 1102 is provided instead of the measurement report receiving unit 1002, the transfer request transmitting unit 1004, the determining unit 1006, and the branching response receiving unit 1008.
  • the functional configuration of the first base station 1000 is the same, and thus the description will be omitted as appropriate.
  • the receiving unit 1102 may be configured to receive, in the case of triggering the above-described transfer process by the second base station as the connection transfer source node, receiving a notification regarding the transfer process from the second base station or the third base station as the connection transfer destination node,
  • the notification may include the result of the admission control performed by the third base station.
  • the functional configurations of the respective units described with reference to FIG. 10 are the same, and the description thereof will not be repeated here.
  • FIG. 12 is a block diagram showing a functional configuration example of a second base station as a connection transfer source node, according to an embodiment of the present disclosure.
  • the second base station 1200 may include a receiving unit 1202.
  • the receiving unit 1202 may be configured to receive a notification about the transfer process from the first base station or the third base station as the connection transfer destination node in the case where the transfer process is triggered by the first base station as the connection holding node, the notification may be The result of the admission control performed by the third base station and the result of the admission control performed by the optional first base station are included.
  • the second base station 1200 may further include a user equipment notification unit 1204.
  • the user equipment notification unit 1204 may be configured to notify the user equipment of the result of the admission control performed by the third base station and the result of the admission control performed by the optional first base station.
  • the second base station 1200 may further include a data forwarding unit 1206.
  • the data forwarding unit 1206 can be configured to perform a data forwarding operation to the third base station and the optional first base station to forward the data of the third base station and the data bearer receivable by the first base station to the third base station and First base station.
  • the second base station 1200 may further include a core network notification unit 1208.
  • the core network notification unit 1208 can be configured to notify the core if the data of the second base station is directly from the core network. The network switches the route corresponding to the data bearer receivable by the first base station to the first base station.
  • FIG. 13 is a block diagram showing a functional configuration example of a second base station as a connection transfer source node, according to another embodiment of the present disclosure.
  • the measurement result receiving unit 1302, the determining unit 1304, the branch request transmitting unit 1306, and the branching response receiving unit 1308 are provided, as shown in FIG.
  • the functional configuration of the second base station 1300 is the same as that of the second base station 1200 shown in FIG. 12, and thus the description will be appropriately omitted.
  • the measurement result receiving unit 1302 may be configured to receive a mobility measurement result from the user equipment regarding a service carrier between the user equipment and the second base station.
  • the determining unit 1304 may be configured to determine, according to the mobility measurement result received by the measurement result receiving unit 1302, whether the predetermined transfer condition of the service provided by the second base station to the user equipment to the third base station is satisfied.
  • the transfer request transmitting unit 1306 may be configured to, when the determining unit 1304 determines that the predetermined transfer condition is satisfied, transmit a transfer request to the third base station that is the connection transfer destination node to trigger the user equipment to release the wireless data connection with the second base station. Establishing a wireless data connection with the third base station, so that the first base station and the third base station, which are connection holding nodes, perform wireless data connection with the user equipment through different carriers, wherein at least the original service provided by the second base station is at least A portion is transferred to the third base station.
  • the transfer response receiving unit 1308 can be configured to receive a transfer response from the third base station, the transfer response including a result of the admission control performed by the third base station.
  • the third base station 1300 may further include a transfer confirmation receiving unit 1310.
  • the transfer confirmation receiving unit 1310 can be configured to receive a transfer confirmation received from the first base station, the transfer confirmation including a result of the admission control performed by the first base station.
  • the user equipment notification unit 1312, the data forwarding unit 1314, and the core network notification unit 1316 which are shown by broken lines in FIG. 13, are functionally configured with the user equipment notification unit 1204 and the data forwarding unit described above with reference to FIG. 1206 and the core network notification unit 1208 have the same functional configuration, and the description thereof will not be repeated here.
  • FIG. 14 is a block diagram showing a functional configuration example of a third base station as a connection transfer destination node, according to an embodiment of the present disclosure.
  • the third base station 1400 may include a transfer request receiving unit 1402, an admission control execution unit 1404, and a transfer response transmitting unit 1406.
  • the transfer request receiving unit 1402 may be configured to receive a transfer request from the first base station as the trigger holding node or the second base station as the connection transfer source node regarding the transfer process, so that the user equipment is released between the second base station and the second base station Wireless data connection, and in the case that the user equipment and the third base station synchronize access successfully, the first base station and the third base station perform wireless data connection with the user equipment through different carriers, so that the original is provided by the second base station. At least a portion of the traffic is transferred to the third base station.
  • the admission control execution unit 1404 can be configured to perform admission control based on the transfer request received by the transfer request receiving unit 1402 to determine a data bearer of the second base station that the third base station can accommodate.
  • the transfer response transmitting unit 1406 may be configured to transmit a transfer response to the first base station or the second base station that is the trigger node of the transfer process, the transfer response may include a result of the admission control performed by the third base station.
  • the third base station 1400 may further include a core network notification unit 1408.
  • the core network notification unit 1408 may be configured to notify when the data of the second base station directly from the core network or the data of the first base station is forwarded through the second base station and the synchronous access of the user equipment and the third base station is successful.
  • the core network switches the route corresponding to the data bearer receivable by the third base station to the third base station.
  • the third base station 1400 may further include a data forwarding unit 1410.
  • the data forwarding unit 1410 may be configured to perform data forwarding on the first base station if the synchronous access of the user equipment and the third base station fails, so that the first base station in the data bearer originally accepted by the third base station may be The data carried by the accepted data is forwarded to the first base station.
  • both the core network notification unit 1408 and the data forwarding unit 1410 shown in broken lines in FIG. 14 are optional, and those skilled in the art may combine one or more of these units according to actual needs. And any such combination is considered to fall within the scope of the present disclosure.
  • FIG. 15 is a block diagram showing a functional configuration example of a user equipment according to an embodiment of the present disclosure.
  • a user equipment 1500 may include a measurement result report.
  • the measurement result reporting unit 1502 may be configured to report a mobility measurement result of the serving carrier between the user equipment and the second base station as the connection transfer source node to the second base station and optionally the first base station as the connection holding node And as a reference for the triggering node to determine whether the predetermined transfer condition of the second base station to transfer the service provided by the user equipment to the third base station is satisfied.
  • the first notification receiving unit 1504 may be configured to receive a notification from the first base station or the second base station regarding the transfer process, the notification may include a result of the admission control performed by the third base station as the connection transfer destination node and optionally the first The result of the admission control performed by the base station.
  • the synchronization access unit 1506 can be configured to perform synchronous access to the third base station based on the notification received by the transfer notification receiving unit 1504.
  • the user equipment 1500 may further include a second notification receiving unit 1508.
  • the second notification receiving unit 1508 may be configured to receive a notification from the first base station if the user equipment fails to synchronize access to the third base station, the notification including which data about the user equipment can pass the carrier of the first base station Information about the transfer and which data needs to be released.
  • the second notification receiving unit 1508 shown in dashed box in FIG. 15 is also optional.
  • FIG. 16 is a flowchart illustrating an example of a procedure of a method for use in a wireless communication system, according to an embodiment of the present disclosure.
  • the wireless communication system can include a first base station, a second base station, a third base station, and a user equipment, wherein the first base station and the second base station perform wireless data connection with the user equipment through different carriers.
  • method 1600 in accordance with an embodiment of the present disclosure may include determining step S1602 and triggering step S1604.
  • the triggering node may determine whether the predetermined transfer condition of the service provided by the second base station to the user equipment to the third base station is satisfied.
  • the trigger node may be a first base station that is a connection holding node or a second base station that is a connection transfer source node.
  • the transfer process may be triggered to enable the user equipment to release the wireless data connection with the second base station, establishing and The wireless data connection of the third base station, whereby the first base station and the third base station perform a wireless data connection with the user equipment through different carriers, wherein at least a portion of the original service provided by the second base station is transferred to the third base station.
  • the above transfer process further causes a portion of the original service provided by the second base station to be transferred to the first base station.
  • the triggering node sends a transfer request to the third base station, and the third base station performs the transfer request according to the transfer request, if it is determined that the predetermined transfer condition is satisfied according to the received mobility measurement result of the service carrier with respect to the second base station.
  • the first admission control and a transfer response is sent to the trigger node to inform the result of the first admission control.
  • the first base station performs second admission control according to the result of the first admission control and will The result of the second admission control is notified to the second base station.
  • the first base station or the second base station after learning the final result of the first admission control or the second admission control, sends a notification message to the user equipment according to the final result and the feedback information of the third base station to notify the user equipment to perform the handover.
  • the notification message includes at least one of the following: the part of the data equipment of the user equipment can be communicated by the first base station, the part of the data equipment of the user equipment can be communicated, and the third base station is synchronized.
  • the required dedicated preamble system information of the carrier that the user equipment communicates with the third base station, and configuration information of a control plane protocol for establishing communication between the user equipment and the third base station.
  • the user equipment releases the data bearer that cannot be accepted by the first base station and the third base station after receiving the notification message, and releases the wireless data connection with the second base station and performs the synchronous access operation to the third base station.
  • embodiments of the present disclosure also provide a storage medium including machine readable program code that, when executed on an information processing device, causes the information processing device to perform the present disclosure as described above
  • the method for use in a wireless communication system comprising: a determining step, configured by the triggering node to determine whether a predetermined transfer condition for transferring the service provided by the second base station to the user equipment to the third base station is satisfied; and triggering a step of triggering a transfer process in a case where the predetermined transfer condition is satisfied, so that the user equipment releases the wireless data connection with the second base station, establishing a wireless data connection with the third base station, thereby the first base station and the first base station
  • the three base stations perform wireless data connection with the user equipment through different carriers, wherein the original is made by the second At least a portion of the service provided by the base station is transferred to the third base station, wherein the first base station, the second base station, the third base station, and the user equipment are included in the wireless communication system, and the first base station and
  • embodiments of the present disclosure also provide a program product including machine-executable instructions that, when executed on an information processing device, cause the information processing device to perform an embodiment as disclosed above
  • the method for use in a wireless communication system comprising: a determining step, configured by the triggering node to determine whether a predetermined transfer condition for transferring a service provided by the second base station to the user equipment to the third base station is satisfied; and a triggering step In the case that it is judged that the predetermined transition condition is satisfied, the transfer process is triggered to enable the user equipment to release the wireless data connection with the second base station, establish a wireless data connection with the third base station, and thereby pass by the first base station and the third base station.
  • Different carriers are wirelessly connected to the user equipment such that at least a portion of the original service provided by the second base station is transferred to the third base station, wherein the first base station, the second base station, the third base station, and the user equipment are included in the wireless In the communication system, and the first base station and the second base station pass different carriers and user equipments Wireless data connection line.
  • a storage medium for carrying a program product storing the above-described storage machine readable instruction code is also included in the disclosure of the present invention.
  • the storage medium includes, but is not limited to, a floppy disk, an optical disk, a magneto-optical disk, a memory card, a memory stick, and the like.
  • a central processing unit (CPU) 1701 executes various processes in accordance with a program stored in a read only memory (ROM) 1702 or a program loaded from a storage portion 1708 to a random access memory (RAM) 1703.
  • ROM read only memory
  • RAM random access memory
  • data required when the CPU 1701 executes various processes and the like is also stored as needed.
  • the CPU 1701, the ROM 1702, and the RAM 1703 are connected to each other via a bus 1704.
  • Input/output interface 1705 is also coupled to bus 1704.
  • the following components are connected to the input/output interface 1705: an input portion 1706 including a keyboard, a mouse, etc.; an output portion 1707 including a display such as a cathode ray tube (CRT), a liquid crystal display (LCD) or the like, and a speaker or the like; a storage portion 1708 including a hard disk or the like; and a communication portion 1709 including a network interface card such as a LAN card, a modem, and the like.
  • the communication section 1709 performs communication processing via a network such as the Internet.
  • the driver 1710 is also connected to the input/output interface 1705 as needed.
  • a removable medium 1711 such as a magnetic disk, an optical disk, a magneto-optical disk, a semiconductor memory or the like is mounted on the drive 1710 as needed, so that the computer program read therefrom is installed into the storage portion 1708 as needed.
  • a program constituting the software is installed from a network such as the Internet or a storage medium such as the detachable medium 1711.
  • such a storage medium is not limited to the detachable medium 1711 shown in FIG. 17 in which a program is stored and distributed separately from the device to provide a program to the user.
  • Examples of the detachable medium 1711 include a magnetic disk (including a floppy disk (registered trademark)), an optical disk (including a compact disk read only memory (CD-ROM) and a digital versatile disk (DVD)), and a magneto-optical disk (including a mini disk (MD) (registered trademark) )) and semiconductor memory.
  • the storage medium may be a ROM 1702, a hard disk included in the storage portion 1708, or the like, in which programs are stored, and distributed to the user together with the device containing them.

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Abstract

本公开提供了一种无线通信系统和用在无线通信系统中的方法，该无线通信系统包括：第一基站；第二基站；第三基站；以及用户设备，其中，第一基站和第二基站通过不同的载波与用户设备进行无线数据连接，并且其中，触发节点在判断满足第二基站向用户设备提供的业务转移至第三基站的预定转移条件的情况下触发转移过程，以使得用户设备释放与第二基站间的无线数据连接，建立与第三基站的无线数据连接，从而由第一基站和第三基站通过不同的载波与用户设备进行无线数据连接，其中，原始由第二基站提供的业务的至少一部分被转移至第三基站。根据本公开的实施例，能够保证用户设备获得优化的服务质量同时提高数据传输效率。

Description

无线通信系统以及用在无线通信系统中的方法 技术领域
本公开涉及无线通信领域，更具体地，涉及一种无线通信系统以及用在无线通信系统中的方法。
背景技术
当前，在无线通信系统中，用户设备通过不同的载波同时与多个基站进行无线数据连接的技术已经在行业内进行广泛地讨论。然而，特定场景下的解决方案并没有出台。
发明内容
在下文中给出了关于本公开的简要概述，以便提供关于本公开的某些方面的基本理解。但是，应当理解，这个概述并不是关于本公开的穷举性概述。它并不是意图用来确定本公开的关键性部分或重要部分，也不是意图用来限定本公开的范围。其目的仅仅是以简化的形式给出关于本公开的某些概念，以此作为稍后给出的更详细描述的前序。
因此，鉴于以上情形，本公开的目的是提供一种无线通信系统以及用在无线通信系统中的方法，其能够实现在多个基站通过不同的载波同时与用户设备进行无线数据连接的无线通信系统中，如果满足特定条件，则触发用户设备将与其中一些基站之间的数据承载(radio bearer)中的部分或全部转移至其它基站。这样，能够保证用户设备从基站获得理想的服务质量，并且有效地提高了上下行数据的传输效率。
根据本发明的一方面，提供了一种无线通信系统，其包括：第一基站；第二基站；第三基站；以及用户设备，其中，第一基站和第二基站通过不同的载波与用户设备进行无线数据连接，并且其中，触发节点在判断满足第二基站向用户设备提供的业务转移至第三基站的预定转移条件的情况下触发转移过程，以使得用户设备释放与第二基站间的无线数据连接，建立与第三基站的无线数据连接，从而由第一基站和第三基站通过不同的载波与用户设备进行无线数据连接，其中，原始由第二基站提供的业务的至少一部分被转 移至第三基站。
根据本发明的优选实施例，转移过程还可使得原始由第二基站提供的业务的一部分被转移至第一基站。
根据本发明的另一优选实施例，触发节点可以是第一基站或第二基站。
根据本发明的另一优选实施例，触发节点在根据所接收的关于第二基站的服务载波的移动性测量结果而判断满足预定转移条件的情况下，向第三基站发出转移请求，第三基站根据转移请求而执行第一接纳控制并且向第一基站和/或第二基站发出转移响应以通知第一接纳控制的结果，其中，该转移响应包括以下内容至少之一:第三基站能够针对用户设备的哪部分数据承载进行通信、第三基站同步接入所需的专用前导码、用户设备与第三基站通信的载波的系统信息、以及用于建立用户设备与第三基站之间的通信的控制面协议的配置信息。
根据本发明的另一优选实施例，如果第一接纳控制的结果表示第三基站不能接纳用户设备与第二基站之间的全部数据承载，则根据第三基站发出的转移响应或者经由第二基站向第一基站转发的第三基站发出的转移响应，第一基站根据第一接纳控制的结果而执行第二接纳控制并且将第二接纳控制的结果通知给第二基站。
根据本发明的另一优选实施例，第一基站或第二基站在获知第一接纳控制或第二接纳控制的最终结果之后，根据最终结果和第三基站的反馈信息向用户设备发出通知消息以通知用户设备进行转移过程，该通知消息包括以下内容至少之一：第一基站能够针对用户设备的哪部分数据承载进行通信、第三基站能够针对用户设备的哪部分数据承载进行通信、第三基站同步接入所需的专用前导码、用户设备与第三基站通信的载波的系统信息、以及用于建立用户设备与第三基站之间的通信的控制面协议的配置信息，并且用户设备在收到通知消息后释放不能被第一基站和第三基站接纳的数据承载，同时释放与第二基站的无线数据连接并执行对第三基站的同步接入操作。
根据本发明的另一实施例，如果第一、第二和第三基站的数据在转移过程触发之前和完成之后均是直接从核心网路由而来的，则第二基站根据第一接纳控制的结果而执行数据前转(data forwarding)操作以将第三基站可接纳的第一数据承载的数据前转至第三基站，以及还根据第二接纳控制的结果而执行数据前转操作以将第一基站可接纳的第二数据承载的数据前转至第一基站，并由第一基站或第二基站通知核心网将与第二数据承载对应的路由 切换至第一基站。
优选地，如果用户设备与第三基站的同步接入成功，则第三基站通知核心网将与第一数据承载对应的路由切换至第三基站；否则，如果用户设备与第三基站的同步接入失败，则用户设备通知第一基站，第一基站在经过第三接纳控制之后通知第二基站和第三基站，以使得第一数据承载中的第一基站可接纳的第三数据承载的数据被前转至第一基站，并且第一基站通知核心网将与第三数据承载对应的路由切换至第一基站并释放与第一数据承载中的第一基站不能接纳的数据承载对应的核心网承载，同时通知用户设备释放第一数据承载中的第一基站不能接纳的数据承载。
根据本发明的另一优选实施例，如果第二基站的数据是从第一基站前转而来的，则第一基站在完成对第一接纳控制的确认或完成第二接纳控制之后，停止向第二基站转发数据，以及第二基站根据第一接纳控制的结果而执行数据前转操作以将第三基站可接纳的第一数据承载的数据前转至第三基站，以及还根据第二接纳控制的结果而执行数据前转操作以将第一基站可接纳的第二数据承载的数据前转至第一基站。
优选地，第一基站在完成对第一接纳控制的确认后，执行数据前转操作以将第一数据承载的数据前转至第三基站，或者第一基站在接收到用户设备与第三基站同步接入成功的消息之后执行数据前转操作以将第一数据承载的数据前转至第三基站。
此外，优选地，如果用户设备与第三基站的同步接入失败，则用户设备通知第一基站，第一基站停止向第三基站转发数据，并且在第一基站完成第三接纳控制后通知第二基站和第三基站，以使得第一数据承载中的第一基站可接纳的第三数据承载的数据被前转至第一基站并且第一数据承载中的第一基站不能接纳的数据承载被释放，同时通知用户设备释放第一数据承载中的第一基站不能接纳的数据承载。
此外，优选地，如果第三基站的数据在转移过程触发完成之后是由核心网直接路由而来的并且用户设备与第三基站的同步接入成功，则第三基站还通知核心网修改与第三基站可接纳的第一数据承载对应的核心网承载，以使得第一数据承载的数据被直接路由至第三基站。
根据本发明的另一优选实施例，如果第一基站的数据是通过第二基站前转而来的，则第二基站根据第一接纳控制的结果而执行数据前转操作以将第三基站可接纳的第一数据承载的数据前转至第三基站，以及根据第二接纳控 制的结果而执行数据前转操作以将第一基站可接纳的第二数据承载的数据前转至第一基站。
优选地，如果用户设备与第三基站同步接入成功，则第三基站触发核心网执行路由切换以将从核心网发往第二基站的数据直接路由至第三基站，完成路由切换后第三基站开始向第一基站转发经由第一基站传输的下行承载的数据，并且第二基站在完成数据前转操作之后释放与用户设备及其业务相关的信息。
此外，优选地，如果用户设备与第三基站同步接入失败，则用户设备通知第一基站，第一基站在经过第三接纳控制之后通知第二基站和第三基站，以使得经由第二基站向第一基站转发第一数据承载中的第一基站可接纳的第三数据承载的数据以及第一基站的原有业务的数据，同时通知用户设备，并且第二基站在得知该失败之后停止向第三基站转发数据。
此外，优选地，如果用户设备与第三基站同步接入失败，则在第一基站完成第三接纳控制后，由第一基站或第二基站通知核心网将经由第二基站前转至第一基站的数据对应的路由切换至第一基站并释放与第一数据承载中的第一基站不能接纳的数据承载对应的核心网承载，同时通知用户设备释放第一数据承载中的第一基站不能接纳的数据承载。
根据本发明的另一方面，提供了一种用在无线通信系统中的方法，无线通信系统包括第一基站、第二基站、第三基站和用户设备，其中，第一基站和第二基站通过不同的载波与用户设备进行无线数据连接，该方法包括：判断步骤，用于由触发节点判断是否满足第二基站向用户设备提供的业务转移至第三基站的预定转移条件；以及触发步骤，用于在判断满足预定转移条件的情况下，触发转移过程，以使得用户设备释放与第二基站间的无线数据连接，建立与第三基站的无线数据连接，从而并由第一基站和第三基站通过不同的载波与用户设备进行无线数据连接，其中，使得原始由第二基站提供的业务的至少一部分被转移至第三基站。
根据本公开的又一方面，还提供了一种存储介质，该存储介质包括机器可读的程序代码，当在信息处理设备上执行程序代码时，该程序代码使得信息处理设备执行以下步骤：判断步骤，用于由触发节点判断是否满足第二基站向用户设备提供的业务转移至第三基站的预定转移条件；以及触发步骤，用于在判断满足预定转移条件的情况下，触发转移过程，以使得用户设备释放与第二基站间的无线数据连接，建立与第三基站的无线数据连接，从而由第一基站和第三基站通过不同的载波与用户设备进行无线数据连接，其中， 使得原始由第二基站提供的业务的至少一部分被转移至第三基站，其中，第一基站、第二基站、第三基站和用户设备包括在无线通信系统中，并且第一基站和第二基站通过不同的载波与用户设备进行无线数据连接。
根据本公开的再一方面，还提供了一种程序产品，该程序产品包括机器可执行的指令，当在信息处理设备上执行指令时，该指令使得信息处理设备执行以下步骤：判断步骤，用于由触发节点判断是否满足预定转移条件；以及触发步骤，用于在判断满足第二基站向用户设备提供的业务转移至第三基站的预定转移条件的情况下，触发转移过程，以使得用户设备释放与第二基站间的无线数据连接，建立与第三基站的无线数据连接，从而由第一基站和第三基站通过不同的载波与用户设备进行无线数据连接，其中，使得原始由第二基站提供的业务的至少一部分被转移至第三基站，其中，第一基站、第二基站、第三基站和用户设备包括在无线通信系统中，并且第一基站和第二基站通过不同的载波与用户设备进行无线数据连接。
在下面的说明书部分中给出本公开实施例的其它方面，其中，详细说明用于充分地公开本公开实施例的优选实施例，而不对其施加限定。
附图说明
本公开可以通过参考下文中结合附图所给出的详细描述而得到更好的理解，其中在所有附图中使用了相同或相似的附图标记来表示相同或者相似的部件。所述附图连同下面的详细说明一起包含在本说明书中并形成说明书的一部分，用来进一步举例说明本公开的优选实施例和解释本公开的原理和优点。其中：
图1是示出根据本公开的实施例的无线通信系统的示意框图；
图2是示出根据本公开的实施例的由第一基站作为触发节点来触发转移过程的示例场景的示意图；
图3是示出根据本公开的实施例的由第二基站作为触发节点来触发转移过程的示例场景的示意图；
图4是示出根据本公开的实施例的在第一、第二和第三基站的数据在转移过程触发之前和完成之后均是直接从核心网路由而来并且用户设备与第三基站的同步接入成功的情况下的示例场景的示意图；
图5是示出根据本公开的实施例的在第二基站的数据是直接来自核心网 并且用户设备与第三基站的同步接入失败的情况下的示例场景的示意图；
图6A是示出根据本公开的实施例的在第二基站和第三基站的数据是通过第一基站前转而来并且用户设备与第三基站的同步接入成功的情况下的示例场景的示意图；
图6B是示出根据本公开的实施例的在第二基站和第三基站的数据是通过第一基站前转而来并且用户设备与第三基站的同步接入成功的情况下的另一示例场景的示意图；
图6C是示出根据本公开的实施例的在第二基站的数据是通过第一基站前转而来、而第三基站的数据在转移过程触发完成之后由核心网直接路由而来并且用户设备与第三基站的同步接入成功的情况下的示例场景的示意图；
图7是示出根据本公开的实施例的在第二基站的数据是通过第一基站前转而来并且用户设备与第三基站的同步接入失败的情况下的示例场景的示意图；
图8是示出根据本公开的实施例的在第一基站的数据是通过第二基站前转而来并且用户设备与第三基站的同步接入成功的情况下的示例场景的示意图；
图9是示出根据本公开的实施例的在第一基站的数据是通过第二基站前转而来并且用户设备与第三基站的同步接入失败的情况下的示例场景的示意图；
图10是示出根据本公开的实施例的作为连接保持节点的第一基站的功能配置示例的框图；
图11是示出根据本公开的另一实施例的作为连接保持节点的第一基站的功能配置示例的框图；
图12是示出根据本公开的实施例的作为连接转移源节点的第二基站的功能配置示例的框图；
图13是示出根据本公开的另一实施例的作为连接转移源节点的第二基站的功能配置示例的框图；
图14是示出根据本公开的实施例的作为连接转移目标节点的第三基站的功能配置示例的框图；
图15是示出根据本公开的实施例的用户设备的功能配置示例的框图；
图16是示出根据本公开的实施例的用在无线通信系统中的方法的过程示例的流程图；以及
图17是示出作为本公开的实施例中可采用的信息处理设备的个人计算机的示例结构的框图。
具体实施方式
在下文中将结合附图对本公开的示范性实施例进行描述。为了清楚和简明起见，在说明书中并未描述实际实施方式的所有特征。然而，应该了解，在开发任何这种实际实施例的过程中必须做出很多特定于实施方式的决定，以便实现开发人员的具体目标，例如，符合与系统及业务相关的那些限制条件，并且这些限制条件可能会随着实施方式的不同而有所改变。此外，还应该了解，虽然开发工作有可能是非常复杂和费时的，但对得益于本公开内容的本领域技术人员来说，这种开发工作仅仅是例行的任务。
在此，还需要说明的一点是，为了避免因不必要的细节而模糊了本公开，在附图中仅仅示出了与根据本公开的方案密切相关的设备结构和/或处理步骤，而省略了与本公开关系不大的其它细节。
下面将参照图1至图17来描述根据本公开的实施例。首先，将参照图1描述根据本公开的实施例的无线通信系统的示例。图1是示出根据本公开的实施例的无线通信系统的示意框图。
如图1所示，根据本公开的实施例的无线通信系统100可包括第一基站102、第二基站104、第三基站106和用户设备108。其中，第一基站102和第二基站104通过不同的载波与用户设备108进行无线数据连接，并且触发节点在判断满足第二基站104向用户设备108提供的业务转移至第三基站106的预定转移条件的情况下触发转移过程，以使得用户设备108释放与第二基站104间的无线数据连接，建立与第三基站106的无线数据连接，从而由第一基站102和第三基站106通过不同的载波与用户设备108进行无线数据连接，其中，原始由第二基站104提供的业务的至少一部分被转移至第三基站106。
第二基站104向用户设备108提供的业务转移至第三基站106的预定转移条件包括以下因素中的一个或多个：第三基站106比第二基站104的服务质量高出预定阈值；第三基站106的服务质量高于预定阈值；以及第二基站104的服务质量低于第一预定阈值且第三基站106的服务质量高于第二预定 阈值；等等。应理解，上述预定转移条件是在假设已从第一基站102和第二基站104中确定了要转移的对象的情况下而描述的。
另一方面，当通过不同的载波与用户设备进行无线数据连接的两个基站同时满足预定转移条件时，在未确定先转移哪个基站(即分为两步进行转移的过程中，哪一个基站是第一基站102，哪一个基站是第二基站104，哪一个基站是第三基站106)的情况下，作为一个可选的例子，上述预定转移条件还可包括例如其中一个基站比另一基站的服务质量高。
优选地，当从上述两个基站中确定要转移的对象时，需要将关于这两个基站的服务载波的测量结果报告给触发节点，然后触发节点将基于基站类型(例如，主节点/从节点，宏基站/低功率节点，等等)、信道质量或者负载状况等等来确定首先要开始对于哪个基站的转移过程。作为一个可选的例子，如果一个基站的信道质量低于预定阈值并且接近失败而另一个基站正好在寻找更好的邻居，则将信道质量最差的基站确定为要转移的对象，并且首先开始对于该基站的转移过程。作为另一个可选的例子，如果两个基站具有大致相同的信道质量，则将具有较重负载的基站确定为要转移的对象，并且首先开始对于该基站的转移过程。
此外，优选地，在原始由第二基站104提供的业务无法全部被转移至第三基站106的情况下，转移过程还使得原始由第二基站104提供的业务的一部分被转移至第一基站102。应理解，尽管图1中仅示出了一个第一基站102，但是第一基站102的数量并不限于此，而是可以是包括多个第一基站的一组基站，例如联合处理(Joint Processing，JP)技术中的多个协作基站，从而在上述转移过程中，原始由第二基站104提供的业务的一部分也可以被转移至该组基站中的一个或多个第一基站。此外，在该情况下，以小区为单位来衡量多个第一基站的服务质量，例如，在协作多点传输的情况下，可将多个基站协作的载波视为一个小区来衡量多个协作基站的服务质量。
此外，可以理解，在上述转移过程中，由于第一基站102始终保持与用户设备之间的无线数据连接，第二基站104提供的业务被转移，并且原始由第二基站104提供的业务的至少一部分被转移至第三基站106，因此在本发明的一些实施例中，第一基站102也可被称为连接保持节点，第二基站104也可被称为连接转移源节点，并且第三基站106也可被称为连接转移目标节点。而上述触发节点是用户设备108当前所连接到的一个服务节点，例如可以是连接保持节点第一基站102，也可以是连接转移源节点第二基站104。
此外，还应理解，这里所采用的术语“第一”、“第二”和“第三”仅是 为了进行区分以便于描述而不构成限制，例如，在第一基站102符合连接转移源节点或连接转移目标节点的特征时，当然也可以是连接转移源节点或连接转移目标节点，这同样适用于第二基站104和第三基站106。
具体地，触发节点在根据所接收的关于至少第二基站104以及可选的第一基站102和第三基站106的服务载波的移动性测量结果而判断满足预定转移条件的情况下，向第三基站106发出包含第一基站和第二基站的相关信息的转移请求，第三基站106根据转移请求而执行第一接纳控制(first admission control)并且发出转移响应以通知第一接纳控制的结果，其中第三基站106可以向触发节点直接返回转移响应，也可以向用户设备108所连接的另一服务节点发出转移响应。
优选地，该转移响应可包括第三基站106能够针对用户设备108的哪部分数据承载进行通信、第三基站106同步接入所需的专用前导码、用户设备108与第三基站106通信的载波的系统信息、以及用于建立用户设备108与第三基站106之间的通信的控制面协议的配置信息。
优选地，如果第一接纳控制的结果表示第三基站106不能接纳用户设备108与第二基站104之间的全部数据承载，则根据第三基站106的转移响应(直接自第三基站106接收的转移响应或者经由第二基站104向第一基站102转发的第三基站106的转移响应)，第一基站102根据第一接纳控制的结果而执行第二接纳控制并且将第二接纳控制的结果通知给第二基站104。
此外，优选地，第一基站102或第二基站104在获知第一接纳控制或第二接纳控制的最终结果之后，根据最终结果和第三基站106的转移响应向用户设备108发出通知消息以通知用户设备108进行转移过程，该通知消息包括以下内容至少之一：第一基站102能够针对用户设备的哪部分数据承载进行通信、第三基站106能够针对用户设备108的哪部分数据承载进行通信、第三基站106同步接入所需的专用前导码、用户设备108与第三基站106通信的载波的系统信息、以及用于建立用户设备108与第三基站106之间的通信的控制面协议的配置信息。并且用户设备108在收到通知消息后释放不能被第一基站102和第三基站106接纳的数据承载，释放与第二基站104的无线数据连接，并执行对第三基站106的同步接入操作。
此外，优选地，上述触发节点可以是第一基站102或第二基站104。
下面将参照图2和图3描述第一基站102和第二基站104分别作为触发节点的情况下的转移过程的场景示例。图2是示出根据本公开的实施例的由 第一基站作为触发节点来触发转移过程的示例场景的示意图，并且图3是示出根据本公开的实施例的由第二基站作为触发节点来触发转移过程的示例场景的示意图。
如图2所示，在第一基站102作为触发节点的情况下，用户设备108可将该移动性测量结果发送给第二基站104，然后由第二基站104将该移动性测量结果转发给第一基站102，如图2中的实线箭头所示，以作为第一基站102触发转移过程的参考。此例的优点在于，减少对现有标准(用户设备直接向服务基站上报该服务基站的移动性载波测量结果)的修改。此外，用户设备108还可以以例如“测量报告”向第一基站102发送关于第二基站104的服务载波(至少包含主载波)的移动性测量结果，如图2中的虚线箭头所示。此例的优点在于用户设备108可以直接向第一基站102发送关于第二基站104服务载波的测量报告，从而节约了第二基站104与第一基站102之间的信息交互。
接下来，第一基站102可在根据所接收的移动性测量结果的信息判断满足上述预定转移条件之后，以例如“转移请求”向第三基站106发出转移请求，然后第三基站106根据转移请求而执行第一接纳控制，并且以例如“转移响应”向第一基站102发出对转移请求的响应从而将第一接纳控制的结果通知给第一基站102，该第一接纳控制的结果表示第三基站106是否可以接纳用户设备108与第二基站104之间的全部数据承载或者可以接受哪部分数据承载。
此后，由第一基站102或第三基站106以例如“转移通知”将上述第一接纳控制的结果通知给第二基站104，并且由第一基站102或第二基站104根据该结果和第三基站106的转移响应、以例如“转移确认”通知用户设备108进行转移过程，已在上文描述了该通知消息“转移确认”所包含的具体内容，在此不再赘述。
优选地，如果第三基站106所执行的第一接纳控制的结果表示第三基站106不能接纳用户设备108与第二基站104之间的全部数据承载，则第一基站102可根据所接收的“转移响应”中包含的第一接纳控制结果而执行第二接纳控制，如图2中的虚线框所示。可以理解，通过由第一基站102执行第二接纳控制以将第三基站106不能接纳的数据承载的至少一部分转移到第一基站102，可以进一步保证用户设备108获得良好的服务质量。当然，这仅是优选示例而非限制，也可以在第一接纳控制之后直接通知用户设备108释放第三基站106不能接纳的业务而不执行第一基站102的第二接纳控制。经 过第一接纳控制和/或第二接纳控制的判断后,第二基站104释放原来通过第二基站104进行传输的、第三基站106和第一基站102不能接纳的无线数据承载，并通知核心网释放与该无线数据承载对应的核心网承载。
应理解，在该情况下，可由第一基站102在执行了第二接纳控制之后以例如“转移通知”向第二基站104通知关于第一接纳控制和第二接纳控制的最终结果，然后由第一基站102或第二基站104根据该最终结果以例如“转移确认”通知用户设备108，从而可以将第三基站106可接纳的数据承载转移至第三基站并且将第一基站102可接纳的数据承载转移至第一基站102。
用户设备108在接收到上述“转移确认”通知消息之后，释放不能被第一基站102和第三基站106接纳的业务，释放与第二基站104的无线数据连接，并执行对第三基站106的同步接入操作。
以上参照图2详细描述了在第一基站102作为触发节点的情况下的转移过程的基本信令流程，接下来将参照图3详细描述由第二基站104作为触发节点的情况下的转移过程的场景示例。
如图3所示，由于此时的触发节点是第二基站104，因此用户设备108只需向第二基站104通知其载波移动性测量结果，并且第二基站104在根据该测量结果判断满足预定转移条件后向第三基站106发出转移请求以触发转移过程。然后第三基站106在执行第一接纳控制之后向第二基站104发出对转移请求的响应消息“转移响应”以向第二基站104通知第一接纳控制的结果。接下来，可以由第二基站104或第三基站106将该结果通知给第一基站102，并且第二基站104根据所接收的“转移响应”而以“转移确认”向用户设备108发出通知消息。
优选地，与图2描述的情况类似，第一基站102也可以根据所接收的第一接纳控制的结果而执行第二接纳控制，具体地，当第二基站104接收到的第三基站106的“转移响应”表明第三基站106无法接纳用户设备108与第二基站104之间的全部数据承载时，第二基站104针对第三基站106无法接纳的数据承载向第一基站102发出“转移请求”，第一基站102根据该“转移请求”执行第二接纳控制，并以例如“转移响应”将接纳控制的最终结果通知给第二基站104，此后第二基站104根据该最终结果向用户设备108发出通知。在此例中，第一基站发出的“转移响应”包括第一基站102能够针对用户设备108的哪部分数据承载进行通信。
根据图2和图3的比较可以看出，这两种情况下的转移过程的场景类似， 区别仅在于作为触发节点的基站不同，从而导致某些信令的收发节点和时刻不同。因此，在图3中未详细描述的部分可参考图2，在此不再重复描述。
以上参照图2和图3详细描述了不同情况下的转移过程的基本信令交互的场景示例，以下将参照图4至图9详细描述在转移过程的基本信令交互之后，在不同情况下各个网络节点之间的数据前转(data forwarding)和路由切换(path switch)的场景示例。
图4是示出根据本公开的实施例的在第一、第二和第三基站的数据在转移过程触发之前和完成之后均是直接从核心网路由而来并且用户设备与第三基站的同步接入成功的情况下的示例场景的示意图。
具体地，如果第一基站102、第二基站104和第三基站106的数据在转移过程触发之前和完成之后均是直接从核心网路由而来，则第二基站104根据所接收的第一接纳控制的结果而执行数据前转操作以将第三基站106可接纳的第一数据承载的数据前转至第三基站106，以及还根据第二接纳控制的结果而执行数据前转操作以将第一基站102可接纳的第二数据承载的数据前转至第一基站102，并由第一基站102或第二基站104通知核心网将与第二数据承载对应的路由切换至第一基站102。
应理解，如果第一接纳控制的结果表示第三基站106能够接纳全部数据承载，则仅需向第三基站106前转被其接纳的第一数据承载的数据，否则还需要同时向第一基站102前转被其接纳的第二数据承载的数据。
在数据前转操作之后，如图4所示，如果用户设备108对第三基站106的同步接入成功，则第三基站106通知核心网将与第一数据承载对应的路由切换至第三基站106。具体地，第三基站106可向移动性管理实体(MME)发出例如“路由切换请求”，移动性管理实体在接收到该请求之后向网关发出例如“修改承载请求”，网关在接收到该请求之后执行切换下行路由操作，从而使得第三基站106可接纳的第一数据承载的数据被直接路由至第三基站106，向第二基站104发送结束标志以告知经过第二基站104转发至第三基站106的最后一个数据包的编号。此后，网关向移动性管理实体发出例如“修改承载响应”，同时移动性管理实体在接收到该响应之后向第三基站106发出例如“路由切换确认”作为对路由切换请求的确认，以通知核心网端的路由切换操作完成。然后，第三基站106可通知第二基站104释放相关的用户设备信息，第二基站104在接收到该通知之后可释放与用户设备108及其业务相关的资源。
否则，如图5所示，如果用户设备108对第三基站106的同步接入失败，则用户设备108将通知第一基站102，第一基站102执行第三接纳控制，对第一数据承载进行接纳控制，在经过第三接纳控制之后通知第二基站104和第三基站106，以通知同步接入失败并且使得第一数据承载中第一基站102可接纳的第三数据承载的数据被前转至第一基站102，并且第一基站102还通知核心网将与第三数据承载对应的路由切换至第一基站102，同时，第一基站102通知用户设备108哪些数据可以通过第一基站102的载波进行传输以及哪些数据需要释放，并且通知第二基站104和第三基站106哪些无线数据承载需要释放，并通知核心网释放与该无线数据承载对应的核心网承载。
应指出，在同步接入失败的情况下，如图5所示，由于除了此时由第一基站102通知移动性管理实体之外，涉及核心网端的具体路由切换操作与以上参照图4所描述的过程类似，因此在此不再重复其说明。
从以上参照图4和图5进行的描述可以看出，对于根据第一基站102执行的第二接纳控制的结果而确定的第二数据承载，无论用户设备108对第三基站106的同步接入是否成功，都通知核心网将与其对应的路由切换至第一基站102，而对于根据第三基站106执行的第一接纳控制的结果而确定的第一数据承载，如果用户设备108对第三基站106的同步接入成功，才通知核心网将与第一数据承载对应的路由切换至第三基站106，而如果同步接入失败，则由第一基站102针对第一数据承载执行第三接纳控制，并且通知核心网将与根据第三接纳控制的结果而确定的第三数据承载对应的路由切换至第一基站102，也就是说，对于原始由第二基站104提供的与第二数据承载和第三数据承载对应的业务，此时由第一基站102提供该部分业务。此外，在同步接入失败的情况下，还需要通知用户设备108第三数据业务承载需要转到第一基站102进行传输，并且释放第一基站102经过第三接纳控制不能接受的数据承载。
接下来，将参照图6A、图6B、图6C和图7描述在第二基站104的数据是经由第一基站102前转而来的情况下的示例场景。其中，图6A是示出根据本公开的实施例的在第二基站和第三基站的数据是通过第一基站前转而来并且用户设备与第三基站的同步接入成功的情况下的示例场景的示意图，图6B是示出根据本公开的实施例的在第二基站和第三基站的数据是提供第一基站前转而来并且用户设备与第三基站的同步接入成功的情况下的另一示例场景的示意图，图6C是示出根据本公开的实施例的在第二基站的数据是通过第一基站前转而来、而第三基站的数据在转移过程触发完成之后 由核心网直接路由而来并且用户设备与第三基站的同步接入成功的情况下的示例场景的示意图，并且图7是示出根据本公开的实施例的在第二基站的数据是提供第一基站前转而来并且用户设备与第三基站的同步接入失败的情况下的另一示例场景的示意图。
具体地，如果第二基站104和第三基站106的数据是从第一基站102前转而来的，则第一基站102在完成对第一接纳控制的确认或完成第二接纳控制之后，停止向第二基站104转发数据，以及第二基站104根据第一接纳控制的结果而执行数据前转操作以将第三基站106可接纳的第一数据承载的数据前转至第三基站106，以及还根据第二接纳控制的结果而执行数据前转操作以将第一基站102可接纳的第二数据承载的数据前转至第一基站102。
由于此时第二基站104的数据是从第一基站102前转而来的，因此第一基站102也需要向第三基站106执行数据前转操作，第一基站102可以在完成对第一接纳控制的确认后，与第二基站104同时执行数据前转操作以将第一数据承载的数据前转至第三基站106，而不管用户设备108与第三基站106的同步接入是否成功，如图6A所示。替选地，第一基站102也可以在获知用户设备108与第三基站106的同步接入成功之后才执行数据前转操作，如图6B所示，这更适合于第一基站102和第二基站104同时为一个数据承载传输业务的情形。
此外，第二基站104在完成数据前转操作之后自动释放与用户设备108的业务相关的资源。
特别地，如果第一接纳控制的结果表明第三基站106不能接纳全部数据承载，则在针对被第三基站106接纳的第一数据承载执行数据前转操作的同时，第一基站102除了停止继续向第二基站104转发数据外，第二基站104还需要将被第一基站102接纳的第二数据承载的数据转移回第一基站102进行传输。
替选地，如图6C所示，如果第二基站104的数据是从第一基站102前转而来的，而第三基站106的数据在转移过程触发完成之后是由核心网直接路由而来的，则在用户设备108对第三基站106的同步接入成功的情况下，除了以上参照图6A和图6B所描述的处理过程之外，还涉及核心网端的操作，即，第三基站106需要通知核心网修改与第三基站106可接纳的第一数据承载对应的核心网承载。具体地，在用户设备108与第三基站106的同步接入成功之后，第三基站106还向移动性管理实体发出例如“路由切换请求”，移动性管理实体在接收到该请求之后向网关发出例如“修改承载请求”，网 关在收到该请求之后执行切换下行路由操作，从而将第三基站106可接纳的第一数据承载的数据直接路由至第三基站106，并向第一基站102发送结束标志以告知经过第一基站转发至第三基站106的最后一个数据包的编号，此后网关向移动性管理实体发出例如“修改承载响应”，并且移动性管理实体在收到该响应之后，向第三基站106发出例如“路由切换确认”作为对“路由切换请求”的确认，从而通知第三基站106核心网端的路由切换操作完成。
然而，如果用户设备108对第三基站106的同步接入失败，如图7所示，与参照图5描述的场景类似，用户设备108首先通知第一基站102，第一基站102在接收到该通知之后停止向第三基站106转发数据，并且第一基站102在执行第三接纳控制之后通知第二基站104和第三基站106，以通知同步接入失败并且使得第二基站104和第三基站106针对第一数据承载中第一基站102可接纳的第三数据承载而向其执行数据前转操作，以使得第一数据承载中的第一基站102可接纳的第三数据承载的数据被前转至第一基站102并且第一数据承载中的第一基站102不能接纳的数据承载被释放。同时，第一基站102通知用户设备108哪些数据可以通过第一基站102的载波进行传输以及哪些数据需要释放。
从以上参照图6A、图6B和图7的描述可以看出，由于在这些场景下由第一基站102负责向无线通信系统中的其它基站转发数据，因此在同步接入操作成功和失败的情况下均不涉及核心网的路由切换操作。
此外，还应指出，尽管在图7中示出第一基站102和第二基站104同时向第三基站106执行数据前转操作，但是这仅是示例，并与图6B类似，第一基站102也可以先不向第三基站106执行数据前转操作，本发明对此不作限制。
以下将参照图8和图9描述在第一基站的数据是通过第二基站前转而来的情况下的示例场景。图8是示出根据本公开的实施例的在第一基站的数据是通过第二基站前转而来并且用户设备与第三基站的同步接入成功的情况下的示例场景的示意图，并且图9是示出根据本公开的实施例的在第一基站的数据是通过第二基站前转而来并且用户设备与第三基站的同步接入失败的情况下的示例场景的示意图。
具体地，如果第一基站102的数据是通过第二基站104前转而来的，则第二基站104根据第一接纳控制的结果而执行数据前转操作以将第三基站106可接纳的第一数据承载的数据前转至第三基站106，以及根据第二接纳控制的结果而执行数据前转操作以将第一基站102可接纳的第二数据承载的 数据前转至第一基站102。
如果用户设备108对第三基站106的同步接入成功，则如图8所示，第三基站106触发核心网执行路由切换以将从核心网发往第二基站104的数据直接路由至第三基站106，完成路由切换后第三基站106开始向第一基站102转发经由第一基站102传输的下行承载的数据，并且第二基站104在完成数据前转操作之后释放与用户设备及其业务相关的信息。具体地，在同步接入成功之后，第三基站106向移动性管理实体发出例如“路由切换请求”，移动性管理实体在接收到该请求之后向网关发出例如“修改承载请求”，网关在收到该请求之后执行切换下行路由操作，从而将第三基站106可接纳的第一数据承载的数据直接路由至第三基站106，并向第二基站104发送结束标志，然后第二基站104将该结束标志转发至第一基站102以告知第一基站经过第二基站104转发的最后一个数据包的编号，此后网关向移动性管理实体发出例如“修改承载响应”，并且移动性管理实体在收到该响应之后，向第三基站106发出例如“路由切换确认”作为对“路由切换请求”的确认，从而通知第三基站106核心网端的路由切换操作完成。
从图8可以看出，在同步接入成功的情况下，第二基站104在收到由第一基站102传输的业务的结束标志之后转发给第一基站102，然后在收到由第三基站106和/或第一基站102发出的消息“用户设备信息释放”之后释放与用户设备108相关的所有资源。
否则，如果用户设备108对第三基站106的同步接入失败，则如图9所示，用户设备108通知第一基站102，第一基站102在经过第三接纳控制之后通知第二基站104和第三基站106，以通知同步接入失败以及使得第二基站104和第三基站106针对第一数据承载中第一基站102可接纳的第三数据承载向其执行数据前转操作，同时通知用户设备108哪些数据可以通过第一基站102的载波进行传输以及哪些数据需要释放。
优选地，在同步接入失败的情况下，可以仍通过第二基站104向第一基站102转发第一基站102所传输的业务的数据(即，第一基站102原有业务的数据、第二数据承载的数据以及第三数据承载的数据)。在该情况下，当需要在小基站之间进行切换时，由于总是存在一个锚点基站(例如，此处的第二基站104)负责数据转发，从而仅需要通知锚点基站进行数据转发的转移即可。
然而，替选地，也可以在第一基站102完成第三接纳控制之后，由第一基站102或第二基站104通知核心网针对被第一基站102接纳的所有数据承 载的数据执行路由切换，以将经由第二基站104前转至第一基站102的数据对应的路由切换至第一基站102并释放与第一数据承载中的第一基站102不能接纳的数据承载对应的核心网承载，同时通知用户设备108释放第一数据承载中的第一基站102不能接纳的数据承载。
应指出，在同步接入失败的情况下，如图9所示，由于除了此时由第一基站102或第二基站104来通知移动性管理实体之外，涉及核心网的具体路由切换操作与以上参照图8描述的过程类似，因此在此不再重复其说明。
以上参照图4至图9描述了在各种情形下转移过程之后的数据前转和路由切换操作，但是应理解，附图及其相关描述仅为示例而非限制，并且本领域技术人员可以根据本发明的原理而对上述过程进行修改。例如，尽管以上以由第一基站102和第三基站106共同承担原始由第二基站104提供的业务的至少一部分，但是也可以由第三基站106单独地进行承担，而对于第三基站106无法接纳的业务，则通知用户设备108放弃该部分业务。此外，尽管在图4至图9中仅示出了第二基站104向第三基站106执行数据前转操作，但这仅是为了图示清楚而非限制，应理解，在第一基站102执行接纳控制的情况下，第二基站104同时也针对被第一基站102接纳的数据承载向第一基站102执行数据前转操作。
另外，还应指出，为了清楚的目的，在附图中仅示出了与本公开密切相关的一些信令交互，而对于本领域公知的其它信令交互，在此则不再赘述。
根据以上给出的本公开的实施例的详细描述可以理解，通过在满足预定转移条件的情况下执行上述转移过程，可以保证用户设备获得优化的服务质量，同时提高数据传输效率。
以下将参照图10描述根据本公开的实施例的作为连接保持节点的第一基站的功能配置的示例。图10是示出根据本公开的实施例的作为连接保持节点的第一基站的功能配置示例的框图。
如图10所示，根据该实施例的第一基站1000可包括测量结果接收单元1002、判断单元1004、转移请求发送单元1006和转移响应接收单元1008。下面将详细描述各个单元的功能配置的示例。
测量结果接收单元1002可被配置成在第一基站1000是用于触发上述转移过程的触发节点的情况下，接收来自用户设备或作为连接转移源节点的第二基站的、关于用户设备与第二基站之间的服务载波的移动性测量结果。
判断单元1004可被配置成基于测量结果接收单元1002所接收的移动性 测量结果而判断是否满足第二基站向用户设备提供的业务转移至第三基站的预定转移条件。
转移请求发送单元1006可被配置成在判断单元1004判断满足预定转移条件的情况下，向作为连接转移目标节点的第三基站发送转移请求，以触发用户设备释放与第二基站间的无线数据连接，建立与第三基站的无线数据连接，从而由第一基站和第三基站通过不同的载波与用户设备进行无线数据连接，其中，使得原始由第二基站提供的业务的至少一部分被转移至第三基站。
转移响应接收单元1008可被配置成从第三基站接收转移响应，该转移响应可包括第三基站执行的接纳控制的结果。
优选地，第一基站1000还可包括第一接纳控制执行单元1010。第一接纳控制执行单元1010可被配置成在转移响应接收单元1008接收的转移响应中所包含的接纳控制结果表示第三基站不能接纳第二基站的全部数据承载的情况下，针对第三基站不能接纳的数据承载执行接纳控制，从而使得第一基站1000能够接纳的数据承载可以被转移至第一基站1000。
另外，可选地，第一基站1000还可包括通知单元1012。通知单元1012可被配置成向用户设备和/或第二基站通知第三基站执行的接纳控制的结果以及可选的第一基站执行的接纳控制的结果。
此外，可选地，第一基站1000还可包括数据前转单元1014。数据前转单元1014可被配置成在第二基站的数据是通过第一基站前转而来的情况下，对第三基站执行数据前转。优选地，数据前转单元1014可以在转移过程的基本信令交互完成之后与第二基站同时进行数据前转，或者也可以在接收到用户设备与第三基站的同步接入成功的消息之后才进行数据前转。
优选地，第一基站1000还可包括第二接纳控制执行单元1016。第二接纳控制执行单元1016可被配置成在用户设备与第三基站的同步接入失败的情况下，对原本应该由第三基站接纳的数据承载执行接纳控制，以使得第一基站可接纳的数据承载被转移至第一基站1000。
此外，优选地，第一基站1000还可包括核心网通知单元1018。核心网通知单元1018可被配置成在第二基站的数据是直接来自核心网的情况下，通知核心网将与第一基站接纳的数据承载对应的路由切换至第一基站。
应理解，以上参照图10描述的第一接纳控制执行单元1010、通知单元1012、数据前转单元1014、第二接纳控制执行单元1016和核心网通知单元1018均是可选的，在图10中以虚线框示出，并且本领域技术人员可例如根 据需要而对上述各个单元中的一个或多个进行组合，并且任意这样的组合都被认为落入本公开的范围内。
接下来，将参照图11描述根据本公开的另一实施例的作为连接保持节点的第一基站的功能配置的示例。图11是示出根据本公开的另一实施例的作为连接保持节点的第一基站的功能配置示例的框图。其中，除了取代测量报告接收单元1002、转移请求发送单元1004、判断单元1006和转移响应接收单元1008而设置了接收单元1102之外，图11所示的第一基站1100与以上参照图10描述的第一基站1000的功能配置相同，因此将适当地省略描述。
接收单元1102可被配置成在由作为连接转移源节点的第二基站来触发上述转移过程的情况下，接收来自第二基站或作为连接转移目标节点的第三基站的关于转移过程的通知，该通知可包括第三基站执行的接纳控制的结果。
此外，对于图11中以虚线框示出的可选的第一接纳控制执行单元1104、通知单元1106、数据前转单元1108、第二接纳控制执行单元1110和核心网通知单元1112，其与以上参照图10描述的相应单元的功能配置相同，在此不再重复描述。
接下来，将参照图12描述根据本公开的实施例的作为连接转移源节点的第二基站的功能配置示例的框图。图12是示出根据本公开的实施例的作为连接转移源节点的第二基站的功能配置示例的框图。
如图12所示，根据本公开的实施例的第二基站1200可包括接收单元1202。接收单元1202可被配置成在由作为连接保持节点的第一基站来触发转移过程的情况下，接收来自第一基站或作为连接转移目标节点的第三基站的关于转移过程的通知，该通知可包括第三基站执行的接纳控制的结果以及可选的第一基站执行的接纳控制的结果。
可选地，第二基站1200还可包括用户设备通知单元1204。用户设备通知单元1204可被配置成向用户设备通知第三基站执行的接纳控制的结果以及可选的第一基站执行的接纳控制的结果。
可选地，第二基站1200还可包括数据前转单元1206。数据前转单元1206可被配置成向第三基站以及可选的第一基站执行数据前转操作，以将第三基站以及第一基站可接纳的数据承载的数据分别前转至第三基站和第一基站。
可选地，第二基站1200还可包括核心网通知单元1208。核心网通知单元1208可被配置成在第二基站的数据是直接来自核心网的情况下，通知核 心网将与第一基站可接纳的数据承载对应的路由切换至第一基站。
接下来，将参照图13描述根据本公开的另一实施例的作为连接转移源节点的第二基站的功能配置的示例。图13是示出根据本公开的另一实施例的作为连接转移源节点的第二基站的功能配置示例的框图。其中，除了取代图12所示的第二基站1200的接收单元1202而设置了测量结果接收单元1302、判断单元1304、转移请求发送单元1306和转移响应接收单元1308之外，图13所示的第二基站1300的功能配置与图12所示的第二基站1200的功能配置相同，因此将适当地省略描述。
测量结果接收单元1302可被配置成接收来自用户设备的、关于用户设备与第二基站之间的服务载波的移动性测量结果。
判断单元1304可被配置成根据测量结果接收单元1302所接收的移动性测量结果而判断是否满足第二基站向用户设备提供的业务转移至第三基站的预定转移条件。
转移请求发送单元1306可被配置成在判断单元1304判断满足预定转移条件的情况下，向作为连接转移目标节点的第三基站发送转移请求，以触发用户设备释放与第二基站间的无线数据连接，建立与第三基站的无线数据连接，从而由作为连接保持节点的第一基站和第三基站通过不同的载波与用户设备进行无线数据连接，其中，使得原始由第二基站提供的业务的至少一部分被转移至第三基站。
转移响应接收单元1308可被配置成从第三基站接收转移响应，该转移响应可包括第三基站执行的接纳控制的结果。
此外，优选地，第三基站1300还可包括转移确认接收单元1310。转移确认接收单元1310可被配置成接收从第一基站接收转移确认，该转移确认可包括第一基站执行的接纳控制的结果。
此外，对于图13中以虚线框示出的用户设备通知单元1312、数据前转单元1314和核心网通知单元1316，其功能配置与以上参照图12描述的用户设备通知单元1204、数据前转单元1206和核心网通知单元1208的功能配置相同，在此不再重复描述。
此外，应指出，与图10和图11所示的情况类似，在图12和图13中以虚线框示出的组成单元为可选的，本领域技术人员可根据实际需要而对这些单元中的一个或多个进行组合，并且任意这样的组合都被认为落入本公开的范围内。
接下来，将参照图14描述根据本公开的实施例的作为连接转移目标节点的第三基站的功能配置的示例。图14是示出根据本公开的实施例的作为连接转移目标节点的第三基站的功能配置示例的框图。
如图14所示，根据本公开的实施例的第三基站1400可包括转移请求接收单元1402、接纳控制执行单元1404和转移响应发送单元1406。
转移请求接收单元1402可被配置成接收来自作为触发节点的、作为连接保持节点的第一基站或作为连接转移源节点的第二基站关于转移过程的转移请求，使得用户设备释放与第二基站间的无线数据连接，并且在用户设备与第三基站同步接入成功的情况下，由第一基站和第三基站通过不同的载波与用户设备进行无线数据连接，以使得原始由第二基站提供的业务的至少一部分被转移至第三基站。
接纳控制执行单元1404可被配置成根据转移请求接收单元1402所接收的转移请求而执行接纳控制，以确定第三基站可接纳的第二基站的数据承载。
转移响应发送单元1406可被配置成向作为转移过程的触发节点的第一基站或第二基站发送转移响应，该转移响应可包括第三基站执行的接纳控制的结果。
可选地，第三基站1400还可包括核心网通知单元1408。核心网通知单元1408可被配置成在第二基站的数据直接来自核心网或者第一基站的数据通过第二基站前转而来并且用户设备与第三基站的同步接入成功的情况下，通知核心网将与第三基站可接纳的数据承载对应的路由切换至第三基站。
此外，可选地，第三基站1400还可包括数据前转单元1410。数据前转单元1410可被配置成在用户设备与第三基站的同步接入失败的情况下，对第一基站执行数据前转，以将原本由第三基站接纳的数据承载中第一基站可接纳的数据承载的数据前转至第一基站。
应理解，图14中以虚线框示出的核心网通知单元1408和数据前转单元1410均是可选的，本领域技术人员可根据实际需要而对这些单元中的一个或多个进行组合，并且任意这样的组合都被认为落入本公开的范围内。
接下来，将参照图15描述根据本公开的实施例的用户设备的功能配置的示例。图15是示出根据本公开的实施例的用户设备的功能配置示例的框图。
如图15所示，根据本公开的实施例的用户设备1500可包括测量结果报 告单元1502、第一通知接收单元1504和同步接入单元1506。
测量结果报告单元1502可被配置成将关于用户设备与作为连接转移源节点的第二基站之间的服务载波的移动性测量结果报告给第二基站以及可选的作为连接保持节点的第一基站，以作为触发节点用于判断是否满足第二基站向用户设备提供的业务转移至第三基站的预定转移条件的参考。
第一通知接收单元1504可被配置成接收来自第一基站或第二基站关于转移过程的通知，该通知可包括作为连接转移目标节点的第三基站执行的接纳控制的结果以及可选的第一基站执行的接纳控制的结果。
同步接入单元1506可被配置成根据转移通知接收单元1504所接收的通知，执行对第三基站的同步接入。
优选地，用户设备1500还可包括第二通知接收单元1508。第二通知接收单元1508可被配置成在用户设备对第三基站的同步接入失败的情况下，接收来自第一基站的通知，该通知包括关于用户设备的哪些数据可以通过第一基站的载波进行传输以及哪些数据需要释放的信息。
类似地，图15中以虚线框示出的第二通知接收单元1508也是可选的。
应理解，尽管以上参照图10至图15描述了根据本公开的实施例的无线通信系统中的第一基站、第二基站、第三基站和用户设备的功能配置的示例，但是应理解，这并不构成对本公开的限制，并且本领域技术人员可以根据本公开的原理而对以上配置进行组合、子组合以及变更等。
接下来，将参照图16描述根据本公开的实施例的用在无线通信系统中的方法的过程示例。图16是示出根据本公开的实施例的用在无线通信系统中的方法的过程示例的流程图。该无线通信系统可包括第一基站、第二基站、第三基站和用户设备，其中，第一基站和第二基站通过不同的载波与用户设备进行无线数据连接。
如图16所示，根据本公开的实施例的方法1600可包括判断步骤S1602和触发步骤S1604。
在判断步骤S1602中，可由触发节点判断是否满足第二基站向用户设备提供的业务转移至第三基站的预定转移条件。该触发节点可以是作为连接保持节点的第一基站或作为连接转移源节点的第二基站。
接下来，在触发步骤S1604中，可在判断满足预定转移条件的情况下，触发转移过程，以使得用户设备释放与第二基站间的无线数据连接，建立与 第三基站的无线数据连接，从而由第一基站和第三基站通过不同的载波与用户设备进行无线数据连接，其中，使得原始由第二基站提供的业务的至少一部分被转移至第三基站。
优选地，上述转移过程还使得原始由第二基站提供的业务的一部分被转移至第一基站。
此外，优选地，触发节点在根据所接收的关于第二基站的服务载波的移动性测量结果而判断满足预定转移条件的情况下，向第三基站发出转移请求，第三基站根据转移请求而执行第一接纳控制并且向触发节点发出转移响应以通知第一接纳控制的结果。
此外，优选地，如果第一接纳控制的结果表示第三基站不能接纳用户设备与第二基站之间的全部数据承载，则第一基站根据第一接纳控制的结果而执行第二接纳控制并且将第二接纳控制的结果通知给第二基站。
此外，优选地，第一基站或第二基站在获知第一接纳控制或第二接纳控制的最终结果之后，根据最终结果和第三基站的反馈信息向用户设备发出通知消息以通知用户设备进行转移过程，该通知消息包括以下内容至少之一：第一基站能够针对用户设备的哪部分数据承载进行通信、第三基站能够针对所述用户设备的哪部分数据承载进行通信、第三基站同步接入所需的专用前导码、用户设备与第三基站通信的载波的系统信息、以及用于建立用户设备与第三基站之间的通信的控制面协议的配置信息。此外，用户设备在收到通知消息后释放不能被第一基站和第三基站接纳的数据承载，同时释放与第二基站的无线数据连接并执行对第三基站的同步接入操作。
应理解，根据本公开的实施例的用在无线通信系统中的方法是与以上描述的无线通信系统的实施例相对应的，因此在此未详细描述的部分可参考先前相应位置的描述，在此不再重复进行描述。
此外，本公开的实施例还提供了一种存储介质，该存储介质包括机器可读的程序代码，当在信息处理设备上执行程序代码时，该程序代码使得信息处理设备执行如上述本公开的实施例所述的用在无线通信系统中的方法，该方法包括：判断步骤，用于由触发节点判断是否满足第二基站向用户设备提供的业务转移至第三基站的预定转移条件；以及触发步骤，用于在判断满足预定转移条件的情况下，触发转移过程，以使得用户设备释放与第二基站间的无线数据连接，建立与第三基站的无线数据连接，从而由第一基站和第三基站通过不同的载波与用户设备进行无线数据连接，其中，使得原始由第二 基站提供的业务的至少一部分被转移至第三基站，其中，第一基站、第二基站、第三基站和用户设备包括在无线通信系统中，并且第一基站和第二基站通过不同的载波与用户设备进行无线数据连接。
此外，本公开的实施例还提供了一种程序产品，该程序产品包括机器可执行的指令，当在信息处理设备上执行指令时，该指令使得信息处理设备执行如上述本公开的实施例所述的用在无线通信系统中的方法，该方法包括：判断步骤，用于由触发节点判断是否满足第二基站向用户设备提供的业务转移至第三基站的预定转移条件；以及触发步骤，用于在判断满足预定转移条件的情况下，触发转移过程，以使得用户设备释放与第二基站间的无线数据连接，建立与第三基站的无线数据连接，从而由第一基站和第三基站通过不同的载波与用户设备进行无线数据连接，以使得原始由第二基站提供的业务的至少一部分被转移至第三基站，其中，第一基站、第二基站、第三基站和用户设备包括在无线通信系统中，并且第一基站和第二基站通过不同的载波与用户设备进行无线数据连接。
应理解，根据本公开的实施例的存储介质和程序产品中的机器可执行的指令还可以被执行以上描述的无线通信系统的实施例相对应的方法，因此在此未详细描述的部分可参考先前相应位置的描述，在此不再重复进行描述。
相应地，用于承载上述存储有机器可读取的指令代码的程序产品的存储介质也包括在本发明的公开中。所述存储介质包括但不限于软盘、光盘、磁光盘、存储卡、存储棒等等。
另外，还应该指出的是，上述系列处理和装置也可以通过软件和/或固件实现。在通过软件和/或固件实现的情况下，从存储介质或网络向具有专用硬件结构的计算机，例如图17所示的通用个人计算机1700安装构成该软件的程序，该计算机在安装有各种程序时，能够执行各种功能等等。
在图17中，中央处理单元(CPU)1701根据只读存储器(ROM)1702中存储的程序或从存储部分1708加载到随机存取存储器(RAM)1703的程序执行各种处理。在RAM 1703中，也根据需要存储当CPU 1701执行各种处理等等时所需的数据。
CPU 1701、ROM 1702和RAM 1703经由总线1704彼此连接。输入/输出接口1705也连接到总线1704。
下述部件连接到输入/输出接口1705：输入部分1706，包括键盘、鼠标等等；输出部分1707，包括显示器，比如阴极射线管(CRT)、液晶显示器 (LCD)等等，和扬声器等等；存储部分1708，包括硬盘等等；和通信部分1709，包括网络接口卡比如LAN卡、调制解调器等等。通信部分1709经由网络比如因特网执行通信处理。
根据需要，驱动器1710也连接到输入/输出接口1705。可拆卸介质1711比如磁盘、光盘、磁光盘、半导体存储器等等根据需要被安装在驱动器1710上，使得从中读出的计算机程序根据需要被安装到存储部分1708中。
在通过软件实现上述系列处理的情况下，从网络比如因特网或存储介质比如可拆卸介质1711安装构成软件的程序。
本领域的技术人员应当理解，这种存储介质不局限于图17所示的其中存储有程序、与设备相分离地分发以向用户提供程序的可拆卸介质1711。可拆卸介质1711的例子包含磁盘(包含软盘(注册商标))、光盘(包含光盘只读存储器(CD-ROM)和数字通用盘(DVD))、磁光盘(包含迷你盘(MD)(注册商标))和半导体存储器。或者，存储介质可以是ROM 1702、存储部分1708中包含的硬盘等等，其中存有程序，并且与包含它们的设备一起被分发给用户。
还需要指出的是，执行上述系列处理的步骤可以自然地根据说明的顺序按时间顺序执行，但是并不需要一定根据时间顺序执行。某些步骤可以并行或彼此独立地执行。
虽然已经详细说明了本公开及其优点，但是应当理解在不脱离由所附的权利要求所限定的本公开的精神和范围的情况下可以进行各种改变、替代和变换。而且，本公开实施例的术语“包括”、“包含”或者其任何其他变体意在涵盖非排他性的包含，从而使得包括一系列要素的过程、方法、物品或者设备不仅包括那些要素，而且还包括没有明确列出的其他要素，或者是还包括为这种过程、方法、物品或者设备所固有的要素。在没有更多限制的情况下，由语句“包括一个……”限定的要素，并不排除在包括所述要素的过程、方法、物品或者设备中还存在另外的相同要素。

Claims (20)

  1. 一种无线通信系统，包括：
    第一基站；
    第二基站；
    第三基站；以及
    用户设备，
    其中，所述第一基站和所述第二基站通过不同的载波与所述用户设备进行无线数据连接，
    并且其中，触发节点在判断满足所述第二基站向所述用户设备提供的业务转移至所述第三基站的预定转移条件的情况下触发转移过程，以使得所述用户设备释放与所述第二基站间的无线数据连接，建立与所述第三基站的无线数据连接，从而由所述第一基站和所述第三基站通过不同的载波与所述用户设备进行无线数据连接，其中，原始由所述第二基站提供的业务的至少一部分被转移至所述第三基站。
  2. 根据权利要求1所述的无线通信系统，其中，所述转移过程还使得原始由所述第二基站提供的业务的一部分被转移至所述第一基站。
  3. 根据权利要求1所述的无线通信系统，其中，所述触发节点是所述第一基站或所述第二基站。
  4. 根据权利要求3所述的无线通信系统，其中，所述触发节点在根据所接收的关于所述第二基站的服务载波的移动性测量结果而判断满足所述预定转移条件的情况下，向所述第三基站发出转移请求，所述第三基站根据所述转移请求而执行第一接纳控制并且向所述第一基站和/或第二基站发出转移响应以通知所述第一接纳控制的结果，其中，所述转移响应包括以下内容至少之一:所述第三基站能够针对所述用户设备的哪部分数据承载进行通信、所述第三基站同步接入所需的专用前导码、所述用户设备与所述第三基站通信的载波的系统信息、以及用于建立所述用户设备与所述第三基站之间的通信的控制面协议的配置信息。
  5. 根据权利要求4所述的无线通信系统，其中，如果所述第一接纳 控制的结果表示所述第三基站不能接纳所述用户设备与所述第二基站之间的全部数据承载，则根据所述第三基站发出的所述转移响应或者经由所述第二基站向所述第一基站转发的所述第三基站发出的所述转移响应，所述第一基站根据所述第一接纳控制的结果而执行第二接纳控制并且将所述第二接纳控制的结果通知给所述第二基站。
  6. 根据权利要求5所述的无线通信系统，其中，所述第一基站或所述第二基站在获知所述第一接纳控制或所述第二接纳控制的最终结果之后，根据所述最终结果和所述第三基站的转移响应向所述用户设备发出通知消息以通知所述用户设备进行所述转移过程，所述通知消息包括以下内容至少之一：所述第一基站能够针对所述用户设备的哪部分数据承载进行通信、所述第三基站能够针对所述用户设备的哪部分数据承载进行通信、所述第三基站同步接入所需的专用前导码、所述用户设备与所述第三基站通信的载波的系统信息、以及用于建立所述用户设备与所述第三基站之间的通信的控制面协议的配置信息，以及
    其中，所述用户设备在收到所述通知消息后释放不能被所述第一基站和所述第三基站接纳的数据承载，同时释放与所述第二基站的无线数据连接并执行对所述第三基站的同步接入。
  7. 根据权利要求5所述的无线通信系统，其中，如果所述第一、第二和第三基站的数据在所述转移过程触发之前和完成之后均是直接从核心网路由而来的，则所述第二基站根据所述第一接纳控制的结果而执行数据前转操作以将所述第三基站可接纳的第一数据承载的数据前转至所述第三基站，以及还根据所述第二接纳控制的结果而执行数据前转操作以将所述第一基站可接纳的第二数据承载的数据前转至所述第一基站，并由所述第一基站或所述第二基站通知核心网将与所述第二数据承载对应的路由切换至所述第一基站。
  8. 根据权利要求7所述的无线通信系统，其中，如果所述用户设备与所述第三基站的同步接入成功，则所述第三基站通知核心网将与所述第一数据承载对应的路由切换至所述第三基站，
    否则，如果所述用户设备与所述第三基站的同步接入失败，则所述用户设备通知所述第一基站，所述第一基站在经过第三接纳控制之后通知所述第二基站和所述第三基站，以使得所述第一数据承载中的所述第一基站可接纳的第三数据承载的数据被前转至所述第一基站，并且所述第一基站通知核心网将与所述第三数据承载对应的路由切换至所述第一基站并释 放与所述第一数据承载中的所述第一基站不能接纳的数据承载对应的核心网承载，同时通知所述用户设备释放所述第一数据承载中的所述第一基站不能接纳的数据承载。
  9. 根据权利要求5所述的无线通信系统，其中，如果所述第二基站的数据是从所述第一基站前转而来的，则所述第一基站在完成对所述第一接纳控制的确认或完成所述第二接纳控制之后，停止向所述第二基站转发数据；以及
    所述第二基站根据所述第一接纳控制的结果而执行数据前转操作以将所述第三基站可接纳的第一数据承载的数据前转至所述第三基站，以及还根据所述第二接纳控制的结果而执行数据前转操作以将所述第一基站可接纳的第二数据承载的数据前转至所述第一基站。
  10. 根据权利要求9所述的无线通信系统，其中，所述第一基站在完成对所述第一接纳控制的确认后，执行数据前转操作以将所述第一数据承载的数据前转至所述第三基站，或者所述第一基站在接收到所述用户设备与所述第三基站同步接入成功的消息之后执行数据前转操作以将所述第一数据承载的数据前转至所述第三基站，
    并且其中，如果所述用户设备与所述第三基站的同步接入失败，则所述用户设备通知所述第一基站，所述第一基站停止向所述第三基站转发数据，并且在所述第一基站完成第三接纳控制后通知所述第二基站和所述第三基站，以使得所述第一数据承载中的所述第一基站可接纳的第三数据承载的数据被前转至所述第一基站并且所述第一数据承载中的所述第一基站不能接纳的数据承载被释放，同时通知所述用户设备释放所述第一数据承载中的所述第一基站不能接纳的数据承载。
  11. 根据权利要求10所述的无线通信系统，其中，如果所述第三基站的数据在转移过程触发完成之后是由核心网直接路由而来的并且所述用户设备与所述第三基站的同步接入成功，则所述第三基站还通知所述核心网修改与所述第三基站可接纳的第一数据承载对应的核心网承载，以使得所述第一数据承载的数据被直接路由至所述第三基站。
  12. 根据权利要求5所述的无线通信系统，其中，如果所述第一基站的数据是通过所述第二基站前转而来的，则所述第二基站根据所述第一接纳控制的结果而执行数据前转操作以将所述第三基站可接纳的第一数据承载的数据前转至所述第三基站，以及根据所述第二接纳控制的结果而执 行数据前转操作以将所述第一基站可接纳的第二数据承载的数据前转至所述第一基站。
  13. 根据权利要求12所述的无线通信系统，其中，如果所述用户设备与所述第三基站同步接入成功，则所述第三基站触发核心网执行路由切换以将从核心网发往所述第二基站的数据直接路由至所述第三基站，完成路由切换后所述第三基站开始向所述第一基站转发经由第一基站传输的下行承载的数据，并且所述第二基站在完成数据前转操作之后释放与所述用户设备及其业务相关的信息。
  14. 根据权利要求12所述的无线通信系统，其中，如果所述用户设备与所述第三基站同步接入失败，则所述用户设备通知所述第一基站，所述第一基站在经过第三接纳控制之后通知所述第二基站和所述第三基站，以使得经由所述第二基站向所述第一基站转发所述第一数据承载中的所述第一基站可接纳的第三数据承载的数据以及所述第一基站的原有业务的数据，同时通知所述用户设备，并且所述第二基站在得知所述同步接入失败之后停止向所述第三基站转发数据。
  15. 根据权利要求14所述的无线通信系统，其中，如果所述用户设备与所述第三基站同步接入失败，则在所述第一基站完成所述第三接纳控制后，由所述第一基站或所述第二基站通知核心网将经由所述第二基站前转至所述第一基站的数据的路由切换至所述第一基站并释放与所述第一数据承载中的所述第一基站不能接纳的数据承载对应的核心网承载，同时通知所述用户设备释放所述第一数据承载中的所述第一基站不能接纳的数据承载。
  16. 一种用在无线通信系统中的方法，所述无线通信系统包括第一基站、第二基站、第三基站和用户设备，其中，所述第一基站和所述第二基站通过不同的载波与所述用户设备进行无线数据连接，所述方法包括：
    判断步骤，用于由触发节点判断是否满足所述第二基站向所述用户设备提供的业务转移至所述第三基站的预定转移条件；以及
    触发步骤，用于在判断满足所述预定转移条件的情况下，触发转移过程，以使得所述用户设备释放与所述第二基站间的无线数据连接，建立与所述第三基站的无线数据连接，从而由所述第一基站和所述第三基站通过不同的载波与所述用户设备进行无线数据连接，其中，原始由所述第二基站提供的业务的至少一部分被转移至所述第三基站。
  17. 根据权利要求16所述的方法，其中，所述转移过程还使得原始由所述第二基站提供的业务的一部分被转移至所述第一基站。
  18. 根据权利要求16所述的方法，其中，所述触发节点在根据所接收的关于所述第二基站的服务载波的移动性测量结果而判断满足所述预定转移条件的情况下，向所述第三基站发出转移请求，所述第三基站根据所述转移请求而执行第一接纳控制并且向所述第一基站和/或第二基站发出转移响应以通知所述第一接纳控制的结果，其中，所述转移响应包括以下内容至少之一:所述第三基站能够针对所述用户设备的哪部分数据承载进行通信、所述第三基站同步接入所需的专用前导码、所述用户设备与所述第三基站通信的载波的系统信息、以及用于建立所述用户设备与所述第三基站之间的通信的控制面协议的配置信息。
  19. 根据权利要求18所述的方法，其中，如果所述第一接纳控制的结果表示所述第三基站不能接纳所述用户设备与所述第二基站之间的全部数据承载，则根据所述第三基站发出的所述转移响应或者经由所述第二基站向所述第一基站转发的所述第三基站发出的所述转移响应，所述第一基站根据所述第一接纳控制的结果而执行第二接纳控制并且将所述第二接纳控制的结果通知给所述第二基站。
  20. 根据权利要求19所述的方法，其中，所述第一基站或所述第二基站在获知所述第一接纳控制或所述第二接纳控制的最终结果之后，根据所述最终结果和所述第三基站的转移响应向所述用户设备发出通知消息以通知所述用户设备进行所述转移过程，所述通知消息包括以下内容至少之一：所述第一基站能够针对所述用户设备的哪部分数据承载进行通信、所述第三基站能够针对所述用户设备的哪部分数据承载进行通信、所述第三基站同步接入所需的专用前导码、所述用户设备与所述第三基站通信的载波的系统信息、以及用于建立所述用户设备与所述第三基站之间的通信的控制面协议的配置信息，以及
    其中，所述用户设备在收到所述通知消息后释放不能被所述第一基站和所述第三基站接纳的数据承载，同时释放与所述第二基站的无线数据连接并执行对所述第三基站的同步接入操作。
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