WO2018090638A1 - Wlan汇聚单元变更方法及装置、基站、系统 - Google Patents

Wlan汇聚单元变更方法及装置、基站、系统 Download PDF

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Publication number
WO2018090638A1
WO2018090638A1 PCT/CN2017/090653 CN2017090653W WO2018090638A1 WO 2018090638 A1 WO2018090638 A1 WO 2018090638A1 CN 2017090653 W CN2017090653 W CN 2017090653W WO 2018090638 A1 WO2018090638 A1 WO 2018090638A1
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WIPO (PCT)
Prior art keywords
wlan
aggregation unit
terminal
base station
wlan aggregation
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PCT/CN2017/090653
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English (en)
French (fr)
Inventor
吴昊
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中兴通讯股份有限公司
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Publication of WO2018090638A1 publication Critical patent/WO2018090638A1/zh

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W36/00—Hand-off or reselection arrangements
    • H04W36/14—Reselecting a network or an air interface
    • H04W36/144—Reselecting a network or an air interface over a different radio air interface technology
    • H04W36/1446—Reselecting a network or an air interface over a different radio air interface technology wherein at least one of the networks is unlicensed
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W24/00—Supervisory, monitoring or testing arrangements
    • H04W24/10—Scheduling measurement reports ; Arrangements for measurement reports
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W84/00—Network topologies
    • H04W84/02—Hierarchically pre-organised networks, e.g. paging networks, cellular networks, WLAN [Wireless Local Area Network] or WLL [Wireless Local Loop]
    • H04W84/10—Small scale networks; Flat hierarchical networks
    • H04W84/12—WLAN [Wireless Local Area Networks]

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method and device for changing a WLAN aggregation unit, a base station, and a system.
  • Wireless Local Area Networks and mobile communication technologies have become the two most successful wireless technologies. Over the years, they have always had complementary advantages. The biggest advantage of Wi-Fi technology in WLAN is that it runs on unlicensed spectrum, anyone can deploy Wi-Fi networks, and can support almost all smart handheld devices that people can think of. Or IoT devices. Wi-Fi is best suited for indoor applications with high capacity, high density and low mobility.
  • mobile communication technology has swept the world in the past few decades, creating a huge wireless wide area network, such as Global System for Mobile Communication (GSM), Wideband Code Division Multiple Access (Wideband Code Division). Multiple Access (WCDMA), Long-Term Evolution (LTE) network. It has the advantages of ubiquitous outdoor coverage, seamless mobility, and more perfect for real-time applications such as voice and streaming. The combination of the two technologies will bring great hope to the entire industry.
  • GSM Global System for Mobile Communication
  • WCDMA Wideband Code Division Multiple Access
  • LTE Long-Term Evolution
  • LTE and WLAN Aggregation (LWA) technology introduces LTE and WLAN Aggregation (LWA) technology.
  • LWA LTE data payload can be separated. Some traffic will be transmitted through WLAN, and the rest will be transmitted through LTE itself, thus greatly improving LTE. Service performance.
  • the data transmitted over the WLAN is sent through the base station to a brand new unit: the WLAN aggregation unit. Then, the WLAN aggregation unit sends the WLAN access point to the terminal.
  • the WLAN aggregation unit is responsible for managing the access point of the WLAN network in the LWA scenario, and is responsible for the interaction between the WLAN network and the LTE network.
  • the WLAN access point list managed by the WLAN aggregation unit is obtained by the base station and is transmitted to the terminal through air interface signaling.
  • the terminal is using a mobile network For network and WLAN aggregation technologies, only WLAN access points can be selected from the list of WLAN access points for connection.
  • the mobility of the terminal is not considered.
  • the coverage from one WLAN aggregation unit to another WLAN convergence unit will inevitably occur.
  • the terminal changes to the new WLAN aggregation unit under the control of the base station, resulting in data loss.
  • the embodiment of the present invention provides a method and a device for changing a WLAN aggregation unit, a base station, and a system, so as to at least solve the problem that the terminal changes to a new WLAN aggregation unit under the control of the base station, causing data loss.
  • a method for changing a WLAN aggregation unit including: a base station requests a target WLAN aggregation unit from a target WLAN aggregation unit to allocate WLAN resources for WLAN aggregation for a terminal; After receiving the acknowledgment information of the request that is returned by the target WLAN aggregation unit, the source WLAN concentrating unit is requested to release the WLAN resource allocated by the source WLAN concentrating unit to the terminal.
  • the method before the base station requests the target WLAN aggregation unit to allocate the WLAN resources for the WLAN aggregation to the terminal, the method further includes: the base station receiving the measurement report sent by the terminal; The report carries the identifiers of other WLAN access points except the list of WLAN access points saved on the terminal; the other WLAN access point identifiers correspond to the target WLAN aggregation unit.
  • the measurement report is a measurement report sent by the terminal to the base station when the following event occurs: the measurement result of the WLAN access point in the WLAN access point list is lower than the first threshold; and the WLAN exists. The measurement result of the WLAN access point outside the access point list is higher than the second threshold.
  • the source WLAN is requested to release the source WLAN to the source WLAN aggregation unit.
  • the method further includes: the base station sends a radio resource control (Radio Resource Control, RRC for short) connection reconfiguration signaling to the terminal, where the RRC connection reconfiguration signaling includes: The identifier of the access point of the WLAN corresponding to the aggregation unit.
  • RRC Radio Resource Control
  • the method further includes: receiving, by the base station, a connection confirmation message sent by the target WLAN aggregation unit to indicate that the terminal is connected to the target WLAN aggregation unit, And after receiving the connection status report message sent by the terminal to indicate that the terminal has been connected to the target WLAN aggregation unit, the base station sends a downlink data packet to the target WLAN aggregation unit, or the base station receives the uplink sent by the terminal from the target WLAN aggregation unit. data pack.
  • the method further includes: receiving, by the base station, a status delivery report message sent by the source WLAN aggregation unit;
  • the status delivery report message includes at least one of the following parameters: a maximum sequence number in a sequence number of a plurality of data packets that have been successfully transmitted to the terminal; a sequence number of the lost data packet; a sequence number of the data packet that was not successfully transmitted.
  • the base station when the received status delivery report message sent by the source WLAN aggregation unit includes the largest sequence number in the sequence numbers of the plurality of data packets that have been successfully sent to the terminal, the base station aggregates to the target WLAN.
  • the sending, by the unit, the downlink data packet includes: sending, by the base station, the first specified data packet stored in the base station to the target WLAN convergence unit; wherein the sequence number of the first designated data packet is greater than the maximum sequence number.
  • the base station sending the downlink data packet to the target WLAN aggregation unit includes: storing the base station The second designated data packet is sent to the target WLAN aggregation unit; wherein the sequence number of the second designated data packet is equal to the sequence number of the lost data packet.
  • the base station targets the target.
  • the transmitting, by the WLAN aggregation unit, the downlink data packet includes: transmitting, by the WLAN aggregation unit, the third specified data packet that is stored in the base station to the target WLAN convergence unit; wherein the sequence number of the third designated data packet is equal to the sequence number of the unsuccessfully transmitted data packet.
  • a WLAN aggregation unit changing apparatus including: a first requesting module, configured to allocate a WLAN resource for WLAN aggregation to a terminal to a target WLAN aggregation unit; and the first receiving module is configured to And receiving, by the target WLAN aggregation unit, the acknowledgement information that agrees to the request, where the second requesting module is configured to request the source WLAN aggregation unit to release the WLAN resource allocated by the source WLAN aggregation unit to the terminal.
  • the device further includes: a first receiving module, configured to receive the measurement report sent by the terminal; wherein the measurement report carries the identifier of the WLAN access point other than the WLAN access point list saved on the terminal .
  • the device further includes: a first sending module, configured to send a radio resource control RRC connection reconfiguration signaling to the terminal, where the RRC connection reconfiguration signaling includes: connecting the WLAN corresponding to the target WLAN aggregation unit The identity of the entry point.
  • the device further includes: a second sending module, configured to receive, at the base station, a connection confirmation message sent by the target WLAN aggregation unit to indicate that the terminal has been connected to the target WLAN aggregation unit, and/or the base station receives After the terminal sends a connection status report message indicating that the terminal has been connected to the target WLAN aggregation unit, the downlink data packet is sent to the target WLAN aggregation unit; or the second receiving module is configured to receive the target WLAN aggregation unit and the base station receives the target WLAN aggregation unit.
  • connection confirmation message indicating that the terminal has been connected to the target WLAN aggregation unit, and/or receiving the terminal from the target WLAN aggregation unit after receiving the connection status report message sent by the terminal to indicate that the terminal has connected to the target WLAN aggregation unit
  • the upstream packet sent The upstream packet sent.
  • the device further includes: a third receiving module, configured to receive a status delivery report message sent by the source WLAN aggregation unit, where the status delivery report message includes at least one of the following parameters: successfully sent to the terminal The largest sequence among the serial numbers of multiple packets Number; the serial number of the lost packet; the serial number of the packet that was not successfully sent.
  • a third receiving module configured to receive a status delivery report message sent by the source WLAN aggregation unit, where the status delivery report message includes at least one of the following parameters: successfully sent to the terminal The largest sequence among the serial numbers of multiple packets Number; the serial number of the lost packet; the serial number of the packet that was not successfully sent.
  • the status delivery report message sent by the source WLAN aggregation unit received by the third receiving module of the device includes the largest sequence of sequence numbers of multiple data packets that have been successfully sent to the terminal.
  • the second sending module is further configured to send the first specified data packet stored in the base station to the target WLAN convergence unit, where the sequence number of the first designated data packet is greater than the maximum serial number.
  • the second sending module further And sending, to the target WLAN aggregation unit, the second designated data packet stored in the base station; wherein the sequence number of the second designated data packet is equal to the sequence number of the lost data packet.
  • the second sending module when the status delivery report message sent by the source WLAN aggregation unit received by the third receiving module of the device includes the sequence number of the unsuccessfully transmitted data packet, the second sending module And sending, to the target WLAN aggregation unit, the third designated data packet stored in the base station; wherein the sequence number of the third designated data packet is equal to the sequence number of the unsuccessfully transmitted data packet.
  • a base station comprising: a transmission device, configured to request, from a target wireless local area network WLAN aggregation unit, the target WLAN aggregation unit to allocate a WLAN resource for WLAN aggregation for a terminal; and at a receiving station After the WLAN acknowledgment unit returns the acknowledgment information of the request, the source WLAN concentrating unit is requested to release the WLAN resource allocated by the source WLAN concentrating unit to the terminal.
  • the transmission device is further configured to receive the measurement report sent by the terminal, where the measurement report carries the identifier of the WLAN access point except the WLAN access point list saved on the terminal.
  • the transmitting device is further configured to send the radio resource control RRC connection reconfiguration signaling to the terminal, where the RRC connection reconfiguration signaling includes: an identifier of the WLAN access point corresponding to the target WLAN aggregation unit.
  • the transmitting device is further configured to: when the base station receives the connection confirmation message sent by the target WLAN aggregation unit to indicate that the terminal has been connected to the target WLAN aggregation unit, and/or the base station receives the After the terminal is connected to the connection status report message of the target WLAN aggregation unit, the downlink data packet is sent to the target WLAN aggregation unit; or the uplink data packet sent by the terminal is received from the target WLAN aggregation unit.
  • the transmission device is further configured to receive the status delivery report message sent by the source WLAN aggregation unit, where the status delivery report message includes at least one of the following parameters: a sequence of multiple data packets that have been successfully sent to the terminal. The largest serial number in the number; the serial number of the lost packet; the serial number of the packet that was not successfully sent.
  • the transmitting apparatus is further configured to: when the received status delivery report message sent by the source WLAN aggregation unit includes the largest sequence number in the sequence numbers of the plurality of data packets that have been successfully sent to the terminal Transmitting, by the base station, the first designated data packet stored in the base station to the target WLAN aggregation unit; and/or, in the case that the received status transmission report message sent by the source WLAN aggregation unit includes the sequence number of the lost data packet And transmitting, to the target WLAN aggregation unit, the second designated data packet stored in the base station; and/or, in the status delivery report message sent by the received source WLAN aggregation unit, the sequence number of the unsuccessfully transmitted data packet Transmitting, by the base station, the third designated data packet stored in the base station to the target WLAN convergence unit, where the sequence number of the first designated data packet is greater than the maximum sequence number; and the second designated data packet
  • the sequence number is equal to the sequence number of the lost data packet; the sequence number of the third designated data packet is equal to
  • a system comprising: a base station, a terminal, a target wireless local area network WLAN aggregation unit, and a source WLAN aggregation unit; wherein the base station is configured to request the target WLAN aggregation unit
  • the target WLAN aggregation unit allocates WLAN resources for WLAN aggregation to the terminal; and after receiving the acknowledgment information returned by the target WLAN aggregation unit to approve the request, requesting the source WLAN aggregation unit to release the source The WLAN resource allocated by the WLAN aggregation unit to the terminal.
  • the terminal is configured to send a test to the base station when the following event occurs.
  • Measurement report The measurement result of the WLAN access point in the WLAN access point list is lower than the first threshold; and the measurement result of the WLAN access point outside the WLAN access point list is higher than the second threshold.
  • the measurement report carries the identifiers of other WLAN access points than the list of WLAN access points saved on the terminal.
  • the base station is further configured to receive a status delivery report message sent by the source WLAN aggregation unit, where the status delivery report message includes at least one of the following parameters: a sequence of multiple data packets that have been successfully sent to the terminal.
  • the largest serial number in the number; the serial number of the lost data packet; the serial number of the unsuccessfully transmitted data packet; and the base station is further configured to: when the status transmission report message includes the maximum sequence number, the base station Transmitting the first designated data packet stored in the target WLAN aggregation unit; and/or, in the case where the status delivery report message includes the sequence number of the lost data packet, storing the second stored in the base station Specifying a data packet to be sent to the target WLAN aggregation unit; and/or, in a case where the status delivery report message includes a sequence number of the unsuccessfully transmitted data packet, the third designated data packet stored in the base station Sending to the target WLAN aggregation unit, where the sequence number of the first designated data packet is greater than the maximum sequence number; the second designated data packet Sequence number equal to the sequence number of the lost packet; packet sequence number of the third sequence number equal to the designated data packet is not successfully transmitted.
  • a storage medium comprising a stored program, wherein the program is executed to perform the method of any of the above.
  • a processor for running a program wherein the program is executed to perform the method of any of the above.
  • the base station requests the source WLAN aggregation unit to release the source WLAN aggregation unit after receiving the acknowledgment information that the target WLAN aggregation unit returns to allocate the WLAN resources for the WLAN aggregation to the terminal.
  • the WLAN resources allocated by the terminal enable the terminal to continue to maintain the WLAN connection during the mobile process, and the data can be ensured that the data is not lost. Therefore, in the related art, the terminal changes to the new WLAN aggregation unit under the control of the base station. The problem of data loss guarantees the continuity of the business.
  • FIG. 1 is a schematic flowchart of a method for changing a WLAN aggregation unit according to an embodiment of the present invention
  • FIG. 2 is a structural block diagram of a WLAN aggregation unit changing apparatus according to an embodiment of the present invention
  • FIG. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • FIG. 4 is a schematic flowchart of a method for changing a WLAN aggregation unit according to a preferred embodiment 1 of the present invention
  • FIG. 5 is a schematic flowchart of a method for changing a WLAN aggregation unit according to a preferred embodiment 2 of the present invention.
  • FIG. 1 is a schematic flowchart of a method for changing a WLAN aggregation unit according to an embodiment of the present invention. As shown in FIG.
  • Step S102 the base station requests the target WLAN aggregation unit to allocate the WLAN resources for WLAN aggregation to the terminal to the target WLAN aggregation unit.
  • Step S104 the base station receives the consent returned by the target WLAN convergence unit. After the acknowledgment information is requested, the source WLAN concentrating unit is requested to release the WLAN resource allocated by the source WLAN concentrating unit to the terminal.
  • the source WLAN aggregation unit After the eNB obtains the acknowledgment information of the WLAN resource for the WLAN aggregation that is agreed by the target WLAN aggregation unit, the source WLAN aggregation unit requests the source WLAN aggregation unit to release the source WLAN aggregation unit.
  • the WLAN resources allocated by the terminal enable the terminal to continue to maintain the WLAN connection during the mobile process, and the data can be ensured that the data is not lost. Therefore, in the related art, the terminal changes to the new WLAN aggregation unit under the control of the base station. The problem of data loss guarantees the continuity of the business.
  • step S102 may be implemented by sending a request signaling to the target WLAN aggregation unit, and the request signaling may be a WT addition request signaling, but is not limited thereto, where the WT is Abbreviation for WLAN aggregation unit; the above confirmation information may be WLAN addition request Acknowledge, but is not limited thereto.
  • the signaling may be implemented, for example, by releasing the request signaling, so that the source WLAN aggregation unit may release the WLAN resource allocated to the base station, and the base station is disconnected from the source WLAN aggregation unit.
  • the method may further include: the base station receiving the measurement report sent by the terminal; wherein the measurement report carries other WLAN connections than the WLAN access point list saved on the terminal. The identity of the entry point.
  • WLAN access point identifiers correspond to the target WLAN aggregation unit.
  • the measurement report carries the WLAN access point identifier corresponding to the target WLAN aggregation unit
  • the base station can determine the target WLAN aggregation unit according to the WLAN access point identifier corresponding to the target WLAN aggregation unit, but Not limited to this.
  • the foregoing measurement report may be a measurement report sent by the terminal to the base station when the following event occurs: the measurement result of the WLAN access point in the WLAN access point list is lower than the first threshold; and the WLAN exists. Measurement of WLAN access points outside the list of access points If it is higher than the second threshold.
  • the first threshold value is less than or equal to the second threshold value.
  • the foregoing measurement result may be the signal quality of the WLAN access point, or the signal strength, or other values that reflect the signal quality and strength of the WLAN access point, and is not limited thereto.
  • the method may further include: the base station transmitting the radio resource control RRC connection reconfiguration signaling to the terminal, where the RRC connection reconfiguration signaling includes: corresponding to the target WLAN aggregation unit The identity of the access point of the WLAN.
  • the terminal is notified to the target WLAN aggregation unit based on the identifier of the access point of the WLAN corresponding to the target WLAN aggregation unit by notifying the terminal of the identity of the access point of the WLAN corresponding to the target WLAN aggregation unit.
  • the method may further include: receiving, by the base station, the connection sent by the target WLAN aggregation unit to indicate that the terminal is connected to the target WLAN aggregation unit.
  • the base station After the acknowledgement message, and/or the base station receives the connection status report message sent by the terminal to indicate that the terminal has been connected to the target WLAN aggregation unit, the base station sends a downlink data packet to the target WLAN aggregation unit, or the base station receives the terminal from the target WLAN aggregation unit.
  • the method may further include: the base station receiving the status delivery report message sent by the source WLAN aggregation unit; wherein the status delivery report message includes at least one of the following parameters: The largest sequence number in the sequence number of multiple packets sent to the terminal; the sequence number of the lost packet; the sequence number of the packet that was not successfully sent.
  • the base station sends the target WLAN aggregation unit to the target WLAN aggregation unit.
  • the downlink data packet may be: the base station sends the first specified data packet stored in the base station to the target WLAN convergence unit; wherein, the sequence number of the first designated data packet is greater than the maximum sequence number; and the received source WLAN aggregation list
  • the base station transmitting the downlink data packet to the target WLAN aggregation unit may be performed by: transmitting the second designated data packet stored in the base station to the target WLAN aggregation unit.
  • sequence number of the second designated data packet is equal to the sequence number of the lost data packet; in the case that the received status delivery report message sent by the source WLAN aggregation unit includes the sequence number of the unsuccessfully transmitted data packet, the base station
  • the sending the downlink data packet to the target WLAN aggregation unit may be performed by: sending the third designated data packet stored in the base station to the target WLAN convergence unit; wherein the sequence number of the third designated data packet is equal to the sequence number of the unsuccessfully transmitted data packet .
  • the base station may also be combined with each other. For example, if the received status transmission report message sent by the source WLAN aggregation unit includes the maximum sequence number and the sequence number of the lost data packet, the base station sends the target WLAN to the target WLAN.
  • the sending, by the aggregation unit, the downlink data packet may be: sending the first designated data packet and the second designated data packet stored in the base station to the target WLAN convergence unit; and the status delivery report message sent by the received source WLAN aggregation unit includes the foregoing
  • the base station transmitting the downlink data packet to the target WLAN aggregation unit may be expressed as: storing the third designated data packet and the second designated data stored in the base station The packet is sent to the target WLAN aggregation unit; but is not limited to this.
  • the method according to the above embodiment can be implemented by means of software plus a necessary general hardware platform, and of course, by hardware, but in many cases, the former is A better implementation.
  • the technical solution of the present invention which is essential or contributes to the prior art, may be embodied in the form of a software product stored in a storage medium (such as ROM/RAM, disk,
  • the optical disc includes a number of instructions for causing a terminal device (which may be a cell phone, a computer, a server, or a network device, etc.) to perform the methods described in various embodiments of the present invention.
  • a WLAN convergence unit changing device is further provided, and the device is used for
  • the above embodiments and preferred embodiments have been implemented, and the detailed description thereof has been omitted.
  • the term "module” may implement a combination of software and/or hardware of a predetermined function.
  • the apparatus described in the following embodiments is preferably implemented in software, hardware, or a combination of software and hardware, is also possible and contemplated.
  • FIG. 2 is a structural block diagram of a WLAN aggregation unit changing apparatus according to an embodiment of the present invention. As shown in FIG. 2, the apparatus includes:
  • the first requesting module 22 is configured to allocate a WLAN resource for WLAN aggregation to the terminal to the target WLAN aggregation unit;
  • the first receiving module 24 is connected to the first requesting module 22, and is configured to receive the confirmation information that the target WLAN aggregation unit returns to the request;
  • the second requesting module 26 is connected to the first receiving module 24, and is configured to request the source WLAN concentrating unit to release the WLAN resource allocated by the source WLAN concentrating unit to the terminal.
  • the second requesting module 26 requests the source WLAN aggregation unit to release the WLAN resource for the WLAN aggregation after the first receiving module 24 receives the acknowledgment information for the terminal to allocate the WLAN resource for the WLAN aggregation.
  • the source WLAN aggregation unit allocates WLAN resources to the terminal, so that the terminal can continue to maintain the WLAN connection during the mobile process, and the data can be ensured not to be lost. Therefore, in the related art, the terminal changes under the control of the base station.
  • the new WLAN aggregation unit will cause data loss and ensure the continuity of the service.
  • the foregoing first requesting module 22 may implement request to allocate resources by sending request signaling to the target WLAN aggregation unit, and the request signaling may be WT addition request signaling, but not
  • the WT is an abbreviation of the WLAN aggregation unit;
  • the acknowledgment information may be WLAN addition request acknowledgment (WT addition request Acknowledge) signaling, but is not limited thereto.
  • the request release resource may also be implemented by signaling, for example, by releasing the request signaling, the source WLAN aggregation unit may release the WLAN resource allocated to the base station, and then the base station and the source WLAN aggregation unit are disconnected. Opened the connection.
  • the apparatus may further include: a first receiving module, connected to the first requesting module 22, configured to receive a measurement report sent by the terminal; wherein the measurement report carries the WLAN connection saved on the terminal.
  • a first receiving module connected to the first requesting module 22, configured to receive a measurement report sent by the terminal; wherein the measurement report carries the WLAN connection saved on the terminal.
  • the identifier of other WLAN access points outside the inbound list; the other WLAN access point identifiers correspond to the target WLAN aggregation unit.
  • the measurement report carries the WLAN access point identifier corresponding to the target WLAN aggregation unit
  • the base station can determine the target WLAN aggregation unit according to the WLAN access point identifier corresponding to the target WLAN aggregation unit, but Not limited to this.
  • the foregoing measurement report may be a measurement report sent by the terminal to the base station when the following event occurs: the measurement result of the WLAN access point in the WLAN access point list is lower than the first threshold; and the WLAN exists.
  • the measurement result of the WLAN access point outside the access point list is higher than the second threshold value; wherein the first threshold value is less than or equal to the second threshold value.
  • the foregoing measurement result may be the signal quality of the WLAN access point, or the signal strength, or other values that reflect the signal quality and strength of the WLAN access point, and is not limited thereto.
  • the apparatus may further include: a first sending module, connected to the second requesting module 26, configured to send a radio resource control RRC connection reconfiguration signaling to the terminal; wherein the RRC connection reconfiguration signaling
  • the method includes: an identifier of an access point of the WLAN corresponding to the target WLAN aggregation unit. And notifying the terminal of the identifier of the access point of the WLAN corresponding to the target WLAN aggregation unit by using the foregoing first sending module, so that the terminal may connect to the target WLAN aggregation unit based on the identifier of the access point of the WLAN corresponding to the target WLAN aggregation unit.
  • the apparatus may further include: a second sending module, configured to be connected to the first sending module, configured to receive, by the base station, a target WLAN concentrating unit, to indicate that the terminal is connected to the target WLAN aggregation a connection confirmation message of the unit, and/or receiving, by the base station, a connection status report message sent by the terminal to indicate that the terminal has been connected to the target WLAN aggregation unit, and sending a downlink data packet to the target WLAN aggregation unit; or, the second receiving module, Connected to the first sending module, configured to receive a target at the base station a connection confirmation message sent by the WLAN aggregation unit to indicate that the terminal has been connected to the target WLAN aggregation unit, and/or the base station receives the connection status report message sent by the terminal to indicate that the terminal has been connected to the target WLAN aggregation unit, from the target The WLAN aggregation unit receives the uplink data packet sent by the terminal.
  • a second sending module configured to be connected to the first sending module, configured to receive
  • the apparatus may further include: a third receiving module, connected to the second requesting module 26, configured to receive a status delivery report message sent by the source WLAN aggregation unit; wherein, the status delivery report message is The at least one of the following parameters is included: a maximum sequence number in a sequence number of a plurality of data packets that have been successfully transmitted to the terminal; a sequence number of the lost data packet; and a sequence number of the data packet that was not successfully transmitted.
  • a third receiving module connected to the second requesting module 26, configured to receive a status delivery report message sent by the source WLAN aggregation unit; wherein, the status delivery report message is The at least one of the following parameters is included: a maximum sequence number in a sequence number of a plurality of data packets that have been successfully transmitted to the terminal; a sequence number of the lost data packet; and a sequence number of the data packet that was not successfully transmitted.
  • the status delivery report message sent by the source WLAN aggregation unit received by the third receiving module of the device includes the largest sequence number in the sequence numbers of the plurality of data packets that have been successfully sent to the terminal.
  • the second sending module is further configured to send the first designated data packet stored in the base station to the target WLAN convergence unit, where the sequence number of the first designated data packet is greater than the maximum serial number
  • the second sending module is further configured to store in the base station if the status delivery report message sent by the source WLAN aggregation unit received by the third receiving module of the device includes the sequence number of the lost data packet.
  • the second sending module is further configured to The base station stored in the third data packet to said designated target WLAN convergence unit; wherein the third sequence number equal to the designated data packet sequence number of the packets is not successfully transmitted.
  • the foregoing apparatus may be located in the base station, but is not limited thereto.
  • each of the above modules may be implemented by software or hardware.
  • the foregoing may be implemented by, but not limited to, the foregoing modules are all located in the same processor; or, the above modules are in any combination.
  • the forms are located in different processors.
  • FIG. 3 is a schematic structural diagram of a base station according to an embodiment of the present invention.
  • the base station includes:
  • the transmitting device 32 is configured to request, from the target wireless local area network WLAN aggregation unit, the target WLAN aggregation unit to allocate WLAN resources for WLAN aggregation to the terminal; and after receiving the acknowledgement information returned by the target WLAN aggregation unit and agreeing to the request And requesting, by the source WLAN aggregation unit, to release the WLAN resource allocated by the source WLAN aggregation unit to the terminal.
  • the source WLAN aggregation unit requests to release the source WLAN aggregation unit as the terminal, after receiving the acknowledgment information of the WLAN resource for WLAN aggregation that is agreed by the target WLAN aggregation unit to be received by the target WLAN aggregation unit.
  • the allocated WLAN resources enable the terminal to continue to maintain the WLAN connection during the mobile process, and the data can be ensured without loss. Therefore, in the related art, the terminal changes to the new WLAN aggregation unit under the control of the base station, which may result in data loss. The problem ensures the continuity of the business.
  • the foregoing transmission device 32 may implement request to allocate resources by sending request signaling to the target WLAN aggregation unit, and the request signaling may be WT addition request signaling, but is not limited thereto.
  • the WT is an abbreviation of the WLAN aggregation unit; the acknowledgment information may be WLAN addition request Acknowledge signaling, but is not limited thereto.
  • the request release resource may also be implemented by signaling, for example, by releasing the request signaling, the source WLAN aggregation unit may release the WLAN resource allocated to the base station, and the base station is disconnected from the source WLAN aggregation unit. connection.
  • the transmitting device 32 may be configured to receive a measurement report sent by the terminal, where the measurement report carries an identifier of a WLAN access point other than the WLAN access point list saved on the terminal; The other WLAN access point identifiers correspond to the target WLAN aggregation unit.
  • the measurement report carries the WLAN access point identifier corresponding to the target WLAN aggregation unit, and the base station can be configured according to the target WLAN aggregation unit.
  • the target WLAN aggregation unit is determined by the WLAN access point identifier, but is not limited thereto.
  • the foregoing measurement report may be a measurement report sent by the terminal to the base station when the following event occurs: the measurement result of the WLAN access point in the WLAN access point list is lower than the first threshold; and the WLAN exists.
  • the measurement result of the WLAN access point outside the access point list is higher than the second threshold value; wherein the first threshold value is less than or equal to the second threshold value.
  • the foregoing measurement result may be the signal quality of the WLAN access point, or the signal strength, or other values that reflect the signal quality and strength of the WLAN access point, and is not limited thereto.
  • the foregoing transmission device 32 may be further configured to send a radio resource control RRC connection reconfiguration signaling to the terminal, where the RRC connection reconfiguration signaling includes: connecting the WLAN corresponding to the target WLAN aggregation unit The identity of the entry point.
  • the transmitting device 32 may be configured to receive, at the base station, a connection confirmation message sent by the target WLAN aggregation unit to indicate that the terminal has been connected to the target WLAN aggregation unit, and/or the base station receives After the terminal sends a connection status report message indicating that the terminal has been connected to the target WLAN aggregation unit, the downlink data packet is sent to the target WLAN aggregation unit; or the uplink data packet sent by the terminal is received from the target WLAN aggregation unit.
  • the foregoing transmitting device 32 may be configured to receive a status delivery report message sent by the source WLAN aggregation unit.
  • the status delivery report message includes at least one of the following parameters: a plurality of parameters that have been successfully sent to the terminal. The maximum sequence number in the serial number of the packet; the sequence number of the lost packet; the sequence number of the packet that was not successfully sent.
  • the foregoing transmission device 32 may be further configured to include, in the status delivery report message sent by the source WLAN aggregation unit, the maximum sequence number of the sequence numbers of the plurality of data packets that have been successfully sent to the terminal.
  • the first designated data packet stored in the base station is sent to the target WLAN aggregation unit; and/or, the status delivery report message sent by the received source WLAN aggregation unit includes the sequence number of the lost data packet.
  • the second designated data packet stored in the base station is sent to the target WLAN aggregation unit; and/or, And transmitting the third specified data packet stored in the base station to the target WLAN convergence unit, where the status of the data packet that is not successfully sent is included in the status transfer report message sent by the source WLAN aggregation unit, where The sequence number of the first designated data packet is greater than the maximum sequence number; the sequence number of the second designated data packet is equal to the sequence number of the lost data packet; the sequence number of the third designated data packet is equal to The serial number of the packet that was not successfully sent.
  • the embodiment of the present invention further provides a system, including: a base station, a terminal, a target wireless local area network WLAN aggregation unit, and a source WLAN aggregation unit; wherein the base station is configured to request the target from the target WLAN aggregation unit
  • the WLAN aggregation unit allocates WLAN resources for WLAN aggregation to the terminal; and after receiving the acknowledgment information returned by the target WLAN aggregation unit to approve the request, requesting the source WLAN aggregation unit to release the source WLAN
  • the WLAN resource allocated by the aggregation unit to the terminal including: a base station, a terminal, a target wireless local area network WLAN aggregation unit, and a source WLAN aggregation unit; wherein the base station is configured to request the target from the target WLAN aggregation unit
  • the WLAN aggregation unit allocates WLAN resources for WLAN aggregation to the terminal; and after receiving the acknowledgment information returned by the target WLAN aggregation unit to approve the request, requesting the source WLAN aggregation
  • the terminal may be configured to send a measurement report to the base station when the following event occurs: the measurement result of the WLAN access point in the WLAN access point list is lower than the first threshold. And the measurement result of the WLAN access point outside the WLAN access point list is higher than the second threshold; wherein the first threshold is less than or equal to the second threshold; wherein the measurement report carries the terminal
  • the identifier of the other WLAN access point except the saved WLAN access point list; the other WLAN access point identifiers correspond to the target WLAN aggregation unit.
  • the foregoing measurement result may be the signal quality of the WLAN access point, or the signal strength, or other values that reflect the signal quality and strength of the WLAN access point, and is not limited thereto.
  • the foregoing base station may be further configured to receive a status delivery report message sent by the source WLAN aggregation unit, where the status delivery report message may include at least one of the following parameters: successfully sent to the terminal.
  • the station is further configured to: send the first designated data packet stored in the base station to the target WLAN aggregation unit if the maximum sequence number is included in the status delivery report message; and/or, in the state And transmitting, in the delivery report message, the second designated data packet stored in the base station to the target WLAN aggregation unit; and/or including in the status delivery report message, where the sequence number of the lost data packet is included in the delivery report message And transmitting, in the case of the sequence number of the unsuccessfully transmitted data packet, the third designated data packet stored in the base station to the target WLAN convergence unit; wherein, the sequence number of the first designated data packet is greater than the maximum a sequence number
  • Embodiments of the present invention also provide a storage medium.
  • the storage medium may be configured to store program code for performing the steps of the method of any of the above.
  • the foregoing storage medium may include, but not limited to, a USB flash drive, a Read-Only Memory (ROM), a Random Access Memory (RAM), a mobile hard disk, and a magnetic memory.
  • ROM Read-Only Memory
  • RAM Random Access Memory
  • a mobile hard disk e.g., a hard disk
  • magnetic memory e.g., a hard disk
  • the processor performs the steps of the method of any of the foregoing according to the stored program code in the storage medium.
  • the base station configures the measurement event to the terminal, and after receiving the measurement report of the terminal, first connects to the target WLAN aggregation unit that needs to be changed. Then, after determining that the connection is successful, disconnect the connection with the source WLAN aggregation unit, and finally notify the UE to connect to the new WLAN access point. The data is forwarded to the target WLAN aggregation unit at the same time and is not lost.
  • the UE represents the terminal
  • the eNB represents the base station
  • the source WLAN aggregation unit is represented by the S-WT
  • the target WLAN aggregation unit is represented by the T-WT.
  • the terminal supports LTE and WLAN aggregation, and uses LTE and WLAN aggregation technologies for data transmission under the indication of the base station.
  • the indication of the base station further includes a list of WLAN access points managed by the WT.
  • the list of WLAN access points is obtained by the base station from the WT.
  • FIG. 4 is a schematic flowchart of a method for changing a WLAN aggregation unit according to a preferred embodiment 1 of the present invention. As shown in FIG. 4, the method includes:
  • Step 1 The base station sends a measurement configuration to the terminal, instructing the terminal to send a measurement report to the base station when an event defined as follows occurs:
  • Event W The measurement result of the WLAN access point in all WLAN access point lists is lower than the threshold 1 and the measurement results of other WLAN access points other than the WLAN access point list are higher than the threshold Threshold 2.
  • the measurement result may be the signal quality of the WLAN access point, or the signal strength, or other values that reflect the quality and strength of the WLAN access point signal.
  • Step 2 The terminal sends a measurement report to the base station when determining that the event occurs, where the report further includes an identifier of the WLAN access point outside the WLAN access point list described in the event description.
  • steps 1 and 2 can be used as one of the conditions for triggering a change of the WT (abbreviation of the WLAN aggregation unit).
  • Step 3 The base station sends WT addition request signaling (corresponding to the request signaling in the foregoing embodiment) to the target WT, and requests the WT resource from the WT.
  • WT addition request signaling corresponding to the request signaling in the foregoing embodiment
  • Step 4 If the target WT can fully satisfy or partially satisfy the resource requested by the base station, send a WT add request Acknowledge (equivalent to the above Response signaling in the example).
  • the signaling is used to notify the base station to agree to the resource request of the base station.
  • Step 5 After receiving the WT addition request Acknowledge signaling sent by the target WT, the base station sends a WT release request (release request signaling equivalent to the release request signaling in the foregoing embodiment) to the source WT, before the request source WT is released. Allocated WLAN resources.
  • Step 6 The base station sends RRC Connection Reconfiguration signaling (corresponding to the RRC connection reconfiguration signaling in the foregoing embodiment) to the terminal, where the configuration information of the new WLAN is included.
  • RRC Connection Reconfiguration signaling corresponding to the RRC connection reconfiguration signaling in the foregoing embodiment
  • Step 7 The terminal saves the new configuration information, and in response, sends an RRC Connection Reconfiguration Complete signaling to the base station.
  • Step 8 According to the new configuration information, the terminal is connected to the target WT.
  • Step 9 The target WT sends a WT Connection Confirmation (corresponding to the connection confirmation message in the foregoing embodiment) to the base station, indicating that the terminal is connected to the WT.
  • Step 10 The terminal may further send a WLAN Connection Status Report message (corresponding to the connection status report message in the foregoing embodiment) to the base station, indicating that it is connected to the target WT.
  • a WLAN Connection Status Report message (corresponding to the connection status report message in the foregoing embodiment)
  • step 10 is a supplement to the terminal, and the terminal may or may not send the message.
  • the base station After receiving the WT Association Confirmation sent by the target WT, the base station considers that the terminal is connected to the target WT, and may send downlink data that needs to be sent to the terminal to the target WT or receive uplink data sent by the terminal from the target WT.
  • FIG. 5 is a schematic flowchart of a method for changing a WLAN aggregation unit according to a preferred embodiment 2 of the present invention. As shown in FIG. 5, the method includes:
  • Step 1 The base station sends a measurement configuration to the terminal, indicating that the terminal has the following defined event. Send a measurement report to the base station:
  • Event W The measurement result of the WLAN access point in all WLAN access point lists is lower than the threshold 1 and the measurement results of other WLAN access points other than the WLAN access point list are higher than the threshold Threshold 2.
  • the measurement result may be the signal quality of the WLAN access point, or the signal strength, or other values that reflect the quality and strength of the WLAN access point signal.
  • Step 2 The terminal sends a measurement report to the base station when determining that the event occurs, where the report further includes an identifier of the WLAN access point outside the WLAN access point list described in the event description.
  • the above two steps may be used as one of the conditions for triggering a change of the WT (abbreviation of the WLAN aggregation unit).
  • Step 3 The base station sends a WT add request signaling to the target WT, and requests the WT resource from the WT.
  • Step 4 If the target WT can fully satisfy or partially satisfy the resource requested by the base station, send an WT add request acknowledgement (addition request Acknowledge).
  • the signaling is used to notify the base station to agree to the resource request of the base station.
  • Step 5 After receiving the WT addition request Acknowledge signaling sent by the target WT, the base station sends a WT release request (release request) signaling to the source WT, requesting the source WT to release the previously allocated WLAN resource.
  • release request release request
  • Step 6 The source WT sends a WT Status Delivery Report message to the base station, where the message includes one or more of the following parameters:
  • Step 7 The base station sends an RRC connection reconfiguration (Connection Reconfiguration) signaling to the terminal, where the configuration information of the new WLAN is included.
  • RRC connection reconfiguration Connection Reconfiguration
  • Step 8 The terminal saves the new configuration information, and in response, sends an RRC connection reconfiguration. Complete (Connection Reconfiguration Complete) signaling to the base station.
  • Step 9 According to the new configuration information, the terminal is connected to the target WT.
  • Step 10 The target WT sends a CONNECT connection confirmation (Association Confirmation) to the base station, indicating that the terminal is connected to the WT.
  • CONNECT connection confirmation Association Confirmation
  • Step 11 The terminal may further send a WLAN Connection Status Report message to the base station to indicate that it is connected to the target WT.
  • step 11 supplements it, the terminal may or may not send this message.
  • the base station After receiving the WT connection confirmation (Association Confirmation) sent by the target WT, the base station considers that the terminal is connected to the target WT, and may send downlink data that needs to be sent to the terminal to the target WT or receive uplink data sent by the terminal from the target WT. .
  • the sending of the downlink data packet to the target WT is specifically: according to the parameter in the message sent by the source WT in step 6, if the highest sequence number of the data packet that has been successfully sent to the terminal is included, the sequence number stored in the transmitting base station is greater than The data packet of the highest sequence number is sent to the target WT. If the lost packet sequence number or the unsuccessfully transmitted packet sequence number, a packet whose sequence number is equal to the sequence number is sent to the target WT. For example, the highest sequence number that the source WT feeds back to the base station for transmission success is 115, and the sequence number of the feedback lost packet is 58, 59, 60. Then, the base station sends a data packet with the sequence number of 58, 59, 60, 116, 117, ... to the target WT.
  • modules or steps of the present invention described above can be implemented by a general-purpose computing device that can be centralized on a single computing device or distributed across a network of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein.
  • the steps shown or described are performed, or they are separately fabricated into individual integrated circuit modules, or a plurality of modules or steps thereof are fabricated as a single integrated circuit module.
  • the invention is not limited to any particular The combination of hardware and software.
  • the base station requests release from the source WLAN aggregation unit after receiving the acknowledgment information of the WLAN resource for the WLAN aggregation that is agreed by the target WLAN aggregation unit.
  • the source WLAN aggregation unit allocates WLAN resources to the terminal, so that the terminal can continue to maintain the WLAN connection during the mobile process, and the data can be ensured not to be lost. Therefore, in the related art, the terminal changes under the control of the base station. The new WLAN aggregation unit will cause data loss and ensure the continuity of the service.

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Abstract

本发明提供了一种WLAN汇聚单元变更方法及装置、基站、系统；其中，WLAN汇聚单元变更方法包括：基站向目标无线局域网WLAN汇聚单元请求所述目标WLAN汇聚单元为终端分配用于WLAN汇聚的WLAN资源；所述基站在接收到所述目标WLAN汇聚单元返回的同意所述请求的确认信息后，向源WLAN汇聚单元请求释放所述源WLAN汇聚单元为所述终端分配的WLAN资源。通过本发明，解决了相关技术中，终端在基站的控制下，变更到新的WLAN汇聚单元会导致数据丢失的问题，保证了业务的连续性。

Description

WLAN汇聚单元变更方法及装置、基站、系统 技术领域
本发明涉及通信技术领域，具体而言，涉及一种WLAN汇聚单元变更方法及装置、基站、系统。
背景技术
现在无线局域网(Wireless Local Area Networks，简称WLAN)和移动通信技术已经成为了两大最为成功的无线技术。多年来，它们一直优势互补。WLAN中的无线保真(Wi-Fi)技术最大的优势在于，它是在未授权的频谱上运行的，任何人都可以部署Wi-Fi网络，而且能够支持人们能想到的几乎所有智能手持设备或物联网设备。Wi-Fi最适合的是大容量、高密度且低移动性的室内应用。另一方面，移动通信技术在过去几十年里横扫全球，打造出了庞大的无线广域网络，例如全球移动通信系统(Global System for Mobile Communication，简称GSM)，宽带码分多址(Wideband Code Division Multiple Access，简称WCDMA)，长期演进(Long-Term Evolution，简称为LTE)网络。它具备无处不在的室外覆盖、无缝的移动等优点，更完美支持语音和流媒体等实时应用。两项技术的结合将为整个行业带来巨大的希望。
目前3GPP R13推出了LTE和WLAN聚合(LTE and WLAN Aggregation，简称LWA)技术，借助LWA，可分离LTE数据有效载荷，一些流量会通过WLAN传输，剩余的则通过LTE本身来传送，从而大大提升LTE服务的性能。通过WLAN传输的数据通过基站发送到一个全新的单元：WLAN汇聚单元。再由WLAN汇聚单元经过WLAN接入点发送给终端。WLAN汇聚单元在LWA场景中负责管理WLAN网络的接入点，以及负责WLAN网络与LTE网络的交互。
基站通过与WLAN汇聚单元的交互，获得该WLAN汇聚单元所管理的WLAN接入点列表，并通过空口信令发送给终端。终端在使用移动网 络和WLAN汇聚技术时，只能从该WLAN接入点列表中选择WLAN接入点进行连接。
然而在R13的LWA技术中，对终端的移动性并没有考虑。当终端在移动过程中，必然会发生从一个WLAN汇聚单元的覆盖范围移动到另一个WLAN汇聚单元的覆盖范围。在这种移动性的场景下，终端在基站的控制下，变更到新的WLAN汇聚单元会导致数据丢失。
针对相关技术中的上述技术问题，目前尚未提出有效的解决方案。
发明内容
本发明实施例提供了一种WLAN汇聚单元变更方法及装置、基站、系统，以至少解决相关技术中，终端在基站的控制下，变更到新的WLAN汇聚单元会导致数据丢失的问题。
根据本发明的一个实施例，提供了一种WLAN汇聚单元变更方法，包括：基站向目标无线局域网WLAN汇聚单元请求所述目标WLAN汇聚单元为终端分配用于WLAN汇聚的WLAN资源；所述基站在接收到所述目标WLAN汇聚单元返回的同意所述请求的确认信息后，向源WLAN汇聚单元请求释放所述源WLAN汇聚单元为所述终端分配的WLAN资源。
在本发明实施例中，在基站向目标无线局域网WLAN汇聚单元请求所述目标WLAN汇聚单元为终端分配用于WLAN汇聚的WLAN资源之前，方法还包括：基站接收终端发送的测量报告；其中，测量报告中携带终端上保存的WLAN接入点列表之外的其他WLAN接入点的标识；其他WLAN接入点标识与目标WLAN汇聚单元是对应的。
在本发明实施例中，测量报告为在以下事件发生时，终端发送给基站的测量报告：WLAN接入点列表中的WLAN接入点的测量结果都低于第一门限值；且存在WLAN接入点列表之外的WLAN接入点的测量结果高于第二门限值。
在本发明实施例中，在向源WLAN汇聚单元请求释放所述源WLAN 汇聚单元为所述终端分配的WLAN资源之后，方法还包括：基站向终端发送无线资源控制(Radio Resource Control，简称为RRC)连接重配信令；其中，RRC连接重配信令中包括：与目标WLAN汇聚单元对应的WLAN的接入点的标识。
在本发明实施例中，，在基站向终端发送RRC连接重配信令之后，方法还包括：在基站接收到目标WLAN汇聚单元发送的用于指示终端已经连接到目标WLAN汇聚单元的连接确认消息，和/或基站接收到终端发送的用于指示终端已经连接到目标WLAN汇聚单元的连接状态报告消息后，基站向目标WLAN汇聚单元发送下行数据包，或者基站从目标WLAN汇聚单元接收终端发送的上行数据包。
在本发明实施例中，在向源WLAN汇聚单元请求释放所述源WLAN汇聚单元为所述终端分配的WLAN资源之后，方法还包括：基站接收源WLAN汇聚单元发送的状态传递报告消息；其中，状态传递报告消息中包括以下至少之一参数：已经成功发送给终端的多个数据包的序列号中的最大序列号；丢失的数据包的序列号；未成功发送的数据包的序列号。
在本发明实施例中，在接收到的源WLAN汇聚单元发送的状态传递报告消息中包括已经成功发送给终端的多个数据包的序列号中的最大序列号的情况下，基站向目标WLAN汇聚单元发送下行数据包包括：基站将基站中存储的第一指定数据包发送给目标WLAN汇聚单元；其中，第一指定数据包的序列号大于最大序列号。
在本发明实施例中，在接收到的源WLAN汇聚单元发送的状态传递报告消息中包括丢失的数据包的序列号的情况下，基站向目标WLAN汇聚单元发送下行数据包包括：将基站中存储的第二指定数据包发送给目标WLAN汇聚单元；其中，第二指定数据包的序列号等于丢失的数据包的序列号。
在本发明实施例中，在接收到的源WLAN汇聚单元发送的状态传递报告消息中包括未成功发送的数据包的序列号的情况下，基站向目标 WLAN汇聚单元发送下行数据包包括：将基站中存储的第三指定数据包发送给目标WLAN汇聚单元；其中，第三指定数据包的序列号等于未成功发送的数据包的序列号。
根据本发明的一个实施例，提供了一种WLAN汇聚单元变更装置，包括：第一请求模块，设置为向目标WLAN汇聚单元为终端分配用于WLAN汇聚的WLAN资源；第一接收模块，设置为接收所述目标WLAN汇聚单元返回的同意所述请求的确认信息；第二请求模块，设置为向源WLAN汇聚单元请求释放所述源WLAN汇聚单元为所述终端分配的WLAN资源。
在本发明实施例中，装置还包括：第一接收模块，设置为接收终端发送的测量报告；其中，测量报告中携带终端上保存的WLAN接入点列表之外的其他WLAN接入点的标识。
在本发明实施例中，装置还包括：第一发送模块，设置为向终端发送无线资源控制RRC连接重配信令；其中，RRC连接重配信令中包括：与目标WLAN汇聚单元对应的WLAN的接入点的标识。
在本发明实施例中，装置还包括：第二发送模块，设置为在基站接收到目标WLAN汇聚单元发送的用于指示终端已经连接到目标WLAN汇聚单元的连接确认消息，和/或基站接收到终端发送的用于指示终端已经连接到目标WLAN汇聚单元的连接状态报告消息后，向目标WLAN汇聚单元发送下行数据包；或者，第二接收模块，设置为在基站接收到目标WLAN汇聚单元发送的用于指示终端已经连接到目标WLAN汇聚单元的连接确认消息，和/或基站接收到终端发送的用于指示终端已经连接到目标WLAN汇聚单元的连接状态报告消息后，从目标WLAN汇聚单元接收终端发送的上行数据包。
在本发明实施例中，装置还包括：第三接收模块，设置为接收源WLAN汇聚单元发送的状态传递报告消息；其中，状态传递报告消息中包括以下至少之一参数：已经成功发送给终端的多个数据包的序列号中的最大序列 号；丢失的数据包的序列号；未成功发送的数据包的序列号。
在本发明实施例中，在所述装置的第三接收模块接收到的源WLAN汇聚单元发送的状态传递报告消息中包括已经成功发送给所述终端的多个数据包的序列号中的最大序列号的情况下，所述第二发送模块，还设置为将基站中存储的第一指定数据包发送给所述目标WLAN汇聚单元；其中，所述第一指定数据包的序列号大于所述最大序列号。
在本发明实施例中，在所述装置的第三接收模块接收到的源WLAN汇聚单元发送的状态传递报告消息中包括丢失的数据包的序列号的情况下，所述第二发送模块，还设置为将基站中存储的第二指定数据包发送给所述目标WLAN汇聚单元；其中，所述第二指定数据包的序列号等于所述丢失的数据包的序列号。
在本发明实施例中，在所述装置的第三接收模块接收到的源WLAN汇聚单元发送的状态传递报告消息中包括未成功发送的数据包的序列号的情况下，所述第二发送模块，还设置为将基站中存储的第三指定数据包发送给所述目标WLAN汇聚单元；其中，所述第三指定数据包的序列号等于所述未成功发送的数据包的序列号。
根据本发明的一个实施例，提供了一种基站，包括：传输装置，设置为向目标无线局域网WLAN汇聚单元请求所述目标WLAN汇聚单元为终端分配用于WLAN汇聚的WLAN资源；以及在接收所述目标WLAN汇聚单元返回的同意所述请求的确认信息后，向源WLAN汇聚单元请求释放所述源WLAN汇聚单元为所述终端分配的WLAN资源。
在本发明实施例中，传输装置还设置为接收终端发送的测量报告；其中，测量报告中携带终端上保存的WLAN接入点列表之外的其他WLAN接入点的标识。
在本发明实施例中，传输装置，还设置为向终端发送无线资源控制RRC连接重配信令；其中，RRC连接重配信令中包括：与目标WLAN汇聚单元对应的WLAN的接入点的标识。
在本发明实施例中，传输装置，还设置为在基站接收到目标WLAN汇聚单元发送的用于指示终端已经连接到目标WLAN汇聚单元的连接确认消息，和/或基站接收到终端发送的用于指示终端已经连接到目标WLAN汇聚单元的连接状态报告消息后，向目标WLAN汇聚单元发送下行数据包；或者，从目标WLAN汇聚单元接收终端发送的上行数据包。
在本发明实施例中，传输装置还设置为接收源WLAN汇聚单元发送的状态传递报告消息；其中，状态传递报告消息中包括以下至少之一参数：已经成功发送给终端的多个数据包的序列号中的最大序列号；丢失的数据包的序列号；未成功发送的数据包的序列号。
在本发明实施例中，传输装置还设置为在接收到的源WLAN汇聚单元发送的状态传递报告消息中包括已经成功发送给所述终端的多个数据包的序列号中的最大序列号的情况下，将基站中存储的第一指定数据包发送给所述目标WLAN汇聚单元；和/或，在接收到的源WLAN汇聚单元发送的状态传递报告消息中包括丢失的数据包的序列号的情况下，将基站中存储的第二指定数据包发送给所述目标WLAN汇聚单元；和/或，在接收到的源WLAN汇聚单元发送的状态传递报告消息中包括未成功发送的数据包的序列号的情况下，将基站中存储的第三指定数据包发送给所述目标WLAN汇聚单元；其中，所述第一指定数据包的序列号大于所述最大序列号；所述第二指定数据包的序列号等于所述丢失的数据包的序列号；所述第三指定数据包的序列号等于所述未成功发送的数据包的序列号。
根据本发明的一个实施例，提供了一种系统，包括：基站、终端、目标无线局域网WLAN汇聚单元和源WLAN汇聚单元；其中，所述基站，设置为向所述目标WLAN汇聚单元请求所述目标WLAN汇聚单元为所述终端分配用于WLAN汇聚的WLAN资源；以及在接收到所述目标WLAN汇聚单元返回的同意所述请求的确认信息后，向所述源WLAN汇聚单元请求释放所述源WLAN汇聚单元为所述终端分配的WLAN资源。
在本发明实施例中，终端，设置为在以下事件发生时，向基站发送测 量报告：WLAN接入点列表中的WLAN接入点的测量结果都低于第一门限值；且存在WLAN接入点列表之外的WLAN接入点的测量结果高于第二门限值；其中，测量报告中携带终端上保存的WLAN接入点列表之外的其他WLAN接入点的标识。
在本发明实施例中，基站，还设置为接收源WLAN汇聚单元发送的状态传递报告消息；其中，状态传递报告消息中包括以下至少之一参数：已经成功发送给终端的多个数据包的序列号中的最大序列号；丢失的数据包的序列号；未成功发送的数据包的序列号；基站，还设置为在所述状态传递报告消息中包括所述最大序列号的情况下，将基站中存储的第一指定数据包发送给所述目标WLAN汇聚单元；和/或，在所述状态传递报告消息中包括所述丢失的数据包的序列号的情况下，将基站中存储的第二指定数据包发送给所述目标WLAN汇聚单元；和/或，在所述状态传递报告消息中包括所述未成功发送的数据包的序列号的情况下，将基站中存储的第三指定数据包发送给所述目标WLAN汇聚单元；其中，所述第一指定数据包的序列号大于所述最大序列号；所述第二指定数据包的序列号等于所述丢失的数据包的序列号；所述第三指定数据包的序列号等于所述未成功发送的数据包的序列号。
根据本发明的又一个实施例，还提供了一种存储介质，所述存储介质包括存储的程序，其中，所述程序运行时执行上述任一项所述的方法。
根据本发明的又一个实施例，还提供了一种处理器，所述处理器用于运行程序，其中，所述程序运行时执行上述任一项所述的方法。
通过本发明，由于所述基站在接收到所述目标WLAN汇聚单元返回的同意为终端分配用于WLAN汇聚的WLAN资源的确认信息后，才向源WLAN汇聚单元请求释放所述源WLAN汇聚单元为所述终端分配的WLAN资源，使得终端在移动过程能够继续保持WLAN的连接，可以保证数据不会丢失，因此，可以解决相关技术中，终端在基站的控制下，变更到新的WLAN汇聚单元会导致数据丢失的问题，保证了业务的连续性。
附图说明
此处所说明的附图用来提供对本发明的进一步理解，构成本申请的一部分，本发明的示意性实施例及其说明用于解释本发明，并不构成对本发明的不当限定。在附图中：
图1是根据本发明实施例提供的一种WLAN汇聚单元变更方法的流程示意图；
图2是根据本发明实施例的WLAN汇聚单元变更装置的结构框图；
图3是根据本发明实施例提供的基站的结构示意图；
图4是根据本发明优选实施例1提供的WLAN汇聚单元变更方法的流程示意图；
图5是根据本发明优选实施例2提供的WLAN汇聚单元变更方法的流程示意图。
具体实施方式
下文中将参考附图并结合实施例来详细说明本发明。需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
需要说明的是，本发明的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。
实施例1
本发明实施例提供了一种WLAN汇聚单元变更方法，图1是根据本发明实施例提供的一种WLAN汇聚单元变更方法的流程示意图，如图1所示，该方法包括：
步骤S102，基站向目标无线局域网WLAN汇聚单元请求所述目标WLAN汇聚单元为终端分配用于WLAN汇聚的WLAN资源；
步骤S104，基站在接收到所述目标WLAN汇聚单元返回的同意所述 请求的确认信息后，向源WLAN汇聚单元请求释放所述源WLAN汇聚单元为所述终端分配的WLAN资源。
通过上述步骤，由于所述基站在接收到所述目标WLAN汇聚单元返回的同意为终端分配用于WLAN汇聚的WLAN资源的确认信息后，才向源WLAN汇聚单元请求释放所述源WLAN汇聚单元为所述终端分配的WLAN资源，使得终端在移动过程能够继续保持WLAN的连接，可以保证数据不会丢失，因此，可以解决相关技术中，终端在基站的控制下，变更到新的WLAN汇聚单元会导致数据丢失的问题，保证了业务的连续性。
需要说明的是，上述步骤S102可以通过向目标WLAN汇聚单元发送请求信令实现，而上述请求信令可以是WLAN汇聚单元添加请求信令(WT addition request)，但并不限于此，其中WT为WLAN汇聚单元的缩写；上述确认信息可以是WLAN汇聚单元添加请求确认信令(WT addition request Acknowledge)，但并不限于此。
需要说明的是，在上述步骤S104也可以通过信令实现，比如通过释放请求信令使得源WLAN汇聚单元可以释放为基站分配的WLAN资源，进而基站与源WLAN汇聚单元断开了连接。
在本发明的一个实施例中，在上述步骤S102之前，上述方法还可以包括：基站接收终端发送的测量报告；其中，测量报告中携带终端上保存的WLAN接入点列表之外的其他WLAN接入点的标识。
需要说明的是，上述其他WLAN接入点标识与目标WLAN汇聚单元是对应的。
需要说明的是，测量报告中携带与目标WLAN汇聚单元是对应的WLAN接入点标识，进而可以基站可以根据与目标WLAN汇聚单元是对应的WLAN接入点标识来确定目标WLAN汇聚单元，但并不限于此。
需要说明的是，上述测量报告可以为在以下事件发生时，终端发送给基站的测量报告：WLAN接入点列表中的WLAN接入点的测量结果都低于第一门限值；且存在WLAN接入点列表之外的WLAN接入点的测量结 果高于第二门限值。
需要说明的是，上述第一门限值小于或者等于上述第二门限值。
需要说明的是，上述测量结果可以是WLAN接入点的信号质量，或是信号强度，或是其他能反映出WLAN接入点信号质量和强度的值，并不限于此。
在本发明的一个实施例中，在上述步骤S104之后，上述方法还可以包括：基站向终端发送无线资源控制RRC连接重配信令；其中，RRC连接重配信令中包括：与目标WLAN汇聚单元对应的WLAN的接入点的标识。通过将与目标WLAN汇聚单元对应的WLAN的接入点的标识通知终端，使得终端可以基于与目标WLAN汇聚单元对应的WLAN的接入点的标识连接到目标WLAN汇聚单元。
在本发明的一个实施例中，在基站向终端发送RRC连接重配信令之后，上述方法还可以包括：在基站接收到目标WLAN汇聚单元发送的用于指示终端已经连接到目标WLAN汇聚单元的连接确认消息，和/或基站接收到终端发送的用于指示终端已经连接到目标WLAN汇聚单元的连接状态报告消息后，基站向目标WLAN汇聚单元发送下行数据包，或者基站从目标WLAN汇聚单元接收终端发送的上行数据包。
在本发明的一个实施例中，在上述步骤S104之后，上述方法还可以包括：基站接收源WLAN汇聚单元发送的状态传递报告消息；其中，状态传递报告消息中包括以下至少之一参数：已经成功发送给终端的多个数据包的序列号中的最大序列号；丢失的数据包的序列号；未成功发送的数据包的序列号。
需要说明的是，在接收到的源WLAN汇聚单元发送的状态传递报告消息中包括已经成功发送给终端的多个数据包的序列号中的最大序列号的情况下，基站向目标WLAN汇聚单元发送下行数据包可以表现为：基站将基站中存储的第一指定数据包发送给目标WLAN汇聚单元；其中，第一指定数据包的序列号大于最大序列号；在接收到的源WLAN汇聚单 元发送的状态传递报告消息中包括丢失的数据包的序列号的情况下，基站向目标WLAN汇聚单元发送下行数据包可以表现为：将基站中存储的第二指定数据包发送给目标WLAN汇聚单元；其中，第二指定数据包的序列号等于丢失的数据包的序列号；在接收到的源WLAN汇聚单元发送的状态传递报告消息中包括未成功发送的数据包的序列号的情况下，基站向目标WLAN汇聚单元发送下行数据包可以表现为：将基站中存储的第三指定数据包发送给目标WLAN汇聚单元；其中，第三指定数据包的序列号等于未成功发送的数据包的序列号。
需要说明的是，上述情况下还可以相互组合，比如在接收到的源WLAN汇聚单元发送的状态传递报告消息中包括上述最大序列号和丢失的数据包的序列号的情况下，基站向目标WLAN汇聚单元发送下行数据包可以表现为：将基站中存储的第一指定数据包和第二指定数据包发送给目标WLAN汇聚单元；在接收到的源WLAN汇聚单元发送的状态传递报告消息中包括上述未成功发送的数据包的序列号和丢失的数据包的序列号的情况下，基站向目标WLAN汇聚单元发送下行数据包可以表现为：将基站中存储的第三指定数据包和第二指定数据包发送给目标WLAN汇聚单元；但并不限于此。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到根据上述实施例的方法可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件，但很多情况下前者是更佳的实施方式。基于这样的理解，本发明的技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质(如ROM/RAM、磁碟、光盘)中，包括若干指令用以使得一台终端设备(可以是手机，计算机，服务器，或者网络设备等)执行本发明各个实施例所述的方法。
实施例2
在本实施例中还提供了一种WLAN汇聚单元变更装置，该装置用于 实现上述实施例及优选实施方式，已经进行过说明的不再赘述。如以下所使用的，术语“模块”可以实现预定功能的软件和/或硬件的组合。尽管以下实施例所描述的装置较佳地以软件来实现，但是硬件，或者软件和硬件的组合的实现也是可能并被构想的。
图2是根据本发明实施例的WLAN汇聚单元变更装置的结构框图，如图2所示，该装置包括：
第一请求模块22，设置为向目标WLAN汇聚单元为终端分配用于WLAN汇聚的WLAN资源；
第一接收模块24，与上述第一请求模块22连接，设置为接收所述目标WLAN汇聚单元返回的同意所述请求的确认信息；
第二请求模块26，与上述第一接收模块24连接，设置为向源WLAN汇聚单元请求释放所述源WLAN汇聚单元为所述终端分配的WLAN资源。通过上述装置，由于第一接收模块24在接收到所述目标WLAN汇聚单元返回的同意为终端分配用于WLAN汇聚的WLAN资源的确认信息后，第二请求模块26才向源WLAN汇聚单元请求释放所述源WLAN汇聚单元为所述终端分配的WLAN资源，使得终端在移动过程能够继续保持WLAN的连接，可以保证数据不会丢失，因此，可以解决相关技术中，终端在基站的控制下，变更到新的WLAN汇聚单元会导致数据丢失的问题，保证了业务的连续性。
需要说明的是，上述第一请求模块22可以通过向目标WLAN汇聚单元发送请求信令实现请求分配资源，而上述请求信令可以是WLAN汇聚单元添加请求(WT addition request)信令，但并不限于此，其中WT为WLAN汇聚单元的缩写；上述确认信息可以是WLAN汇聚单元添加请求确认(WT addition requestAcknowledge)信令，但并不限于此。
需要说明的是，在上述第二请求模块24也可以通过信令实现请求释放资源，比如通过释放请求信令使得源WLAN汇聚单元可以释放为基站分配的WLAN资源，进而基站与源WLAN汇聚单元断开了连接。
在本发明的一个实施例中，上述装置还可以包括：第一接收模块，与上述第一请求模块22连接，设置为接收终端发送的测量报告；其中，测量报告中携带终端上保存的WLAN接入点列表之外的其他WLAN接入点的标识；其他WLAN接入点标识与目标WLAN汇聚单元是对应的。
需要说明的是，测量报告中携带与目标WLAN汇聚单元是对应的WLAN接入点标识，进而可以基站可以根据与目标WLAN汇聚单元是对应的WLAN接入点标识来确定目标WLAN汇聚单元，但并不限于此。
需要说明的是，上述测量报告可以为在以下事件发生时，终端发送给基站的测量报告：WLAN接入点列表中的WLAN接入点的测量结果都低于第一门限值；且存在WLAN接入点列表之外的WLAN接入点的测量结果高于第二门限值；其中，第一门限值小于或者等于第二门限值。
需要说明的是，上述测量结果可以是WLAN接入点的信号质量，或是信号强度，或是其他能反映出WLAN接入点信号质量和强度的值，并不限于此。
在本发明的一个实施例中，上述装置还可以包括：第一发送模块，与上述第二请求模块26连接，设置为向终端发送无线资源控制RRC连接重配信令；其中，RRC连接重配信令中包括：与目标WLAN汇聚单元对应的WLAN的接入点的标识。通过上述第一发送模块将与目标WLAN汇聚单元对应的WLAN的接入点的标识通知终端，使得终端可以基于与目标WLAN汇聚单元对应的WLAN的接入点的标识连接到目标WLAN汇聚单元。
在本发明的一个实施例中，上述装置还可以包括：第二发送模块，与上述第一发送模块连接，设置为在基站接收到目标WLAN汇聚单元发送的用于指示终端已经连接到目标WLAN汇聚单元的连接确认消息，和/或基站接收到终端发送的用于指示终端已经连接到目标WLAN汇聚单元的连接状态报告消息后，向目标WLAN汇聚单元发送下行数据包；或者，第二接收模块，与上述第一发送模块连接，设置为在基站接收到目标 WLAN汇聚单元发送的用于指示终端已经连接到目标WLAN汇聚单元的连接确认消息，和/或基站接收到终端发送的用于指示终端已经连接到目标WLAN汇聚单元的连接状态报告消息后，从目标WLAN汇聚单元接收终端发送的上行数据包。
在本发明的一个实施例中，上述装置还可以包括：第三接收模块，与上述第二请求模块26连接，设置为接收源WLAN汇聚单元发送的状态传递报告消息；其中，状态传递报告消息中包括以下至少之一参数：已经成功发送给终端的多个数据包的序列号中的最大序列号；丢失的数据包的序列号；未成功发送的数据包的序列号。
需要说明的是，在所述装置的第三接收模块接收到的源WLAN汇聚单元发送的状态传递报告消息中包括已经成功发送给所述终端的多个数据包的序列号中的最大序列号的情况下，所述第二发送模块，还设置为将基站中存储的第一指定数据包发送给所述目标WLAN汇聚单元；其中，所述第一指定数据包的序列号大于所述最大序列号；在所述装置的第三接收模块接收到的源WLAN汇聚单元发送的状态传递报告消息中包括丢失的数据包的序列号的情况下，所述第二发送模块，还设置为将基站中存储的第二指定数据包发送给所述目标WLAN汇聚单元；其中，所述第二指定数据包的序列号等于所述丢失的数据包的序列号；在所述装置的第三接收模块接收到的源WLAN汇聚单元发送的状态传递报告消息中包括未成功发送的数据包的序列号的情况下，所述第二发送模块，还设置为将基站中存储的第三指定数据包发送给所述目标WLAN汇聚单元；其中，所述第三指定数据包的序列号等于所述未成功发送的数据包的序列号。
需要说明的是，上述装置可以位于基站中，但并不限于此。
需要说明的是，上述各个模块是可以通过软件或硬件来实现的，对于后者，可以通过以下方式实现，但不限于此：上述模块均位于同一处理器中；或者，上述各个模块以任意组合的形式分别位于不同的处理器中。
实施例3
本发明实施例还提供了一种基站，图3是根据本发明实施例提供的基站的结构示意图，如图3所示，该基站包括：
传输装置32，设置为向目标无线局域网WLAN汇聚单元请求所述目标WLAN汇聚单元为终端分配用于WLAN汇聚的WLAN资源；以及在接收所述目标WLAN汇聚单元返回的同意所述请求的确认信息后，向源WLAN汇聚单元请求释放所述源WLAN汇聚单元为所述终端分配的WLAN资源。
通过上述基站，由于在接收到所述目标WLAN汇聚单元返回的同意为终端分配用于WLAN汇聚的WLAN资源的确认信息后，才向源WLAN汇聚单元请求释放所述源WLAN汇聚单元为所述终端分配的WLAN资源，使得终端在移动过程能够继续保持WLAN的连接，可以保证数据不会丢失，因此，可以解决相关技术中，终端在基站的控制下，变更到新的WLAN汇聚单元会导致数据丢失的问题，保证了业务的连续性。
需要说明的是，上述传输装置32可以通过向目标WLAN汇聚单元发送请求信令实现请求分配资源，而上述请求信令可以是WLAN汇聚单元添加请求(WT addition request)信令，但并不限于此，其中WT为WLAN汇聚单元的缩写；上述确认信息可以是WLAN汇聚单元添加请求确认(WT addition request Acknowledge)信令，但并不限于此。
需要说明的是，在上述传输装置32也可以通过信令实现请求释放资源，比如通过释放请求信令使得源WLAN汇聚单元可以释放为基站分配的WLAN资源，进而基站与源WLAN汇聚单元断开了连接。
在本发明的一个实施例中，上述传输装置32还可以设置为接收终端发送的测量报告；其中，测量报告中携带终端上保存的WLAN接入点列表之外的其他WLAN接入点的标识；其他WLAN接入点标识与目标WLAN汇聚单元是对应的。
需要说明的是，测量报告中携带与目标WLAN汇聚单元是对应的WLAN接入点标识，进而可以基站可以根据与目标WLAN汇聚单元是对 应的WLAN接入点标识来确定目标WLAN汇聚单元，但并不限于此。
需要说明的是，上述测量报告可以为在以下事件发生时，终端发送给基站的测量报告：WLAN接入点列表中的WLAN接入点的测量结果都低于第一门限值；且存在WLAN接入点列表之外的WLAN接入点的测量结果高于第二门限值；其中，第一门限值小于或者等于第二门限值。
需要说明的是，上述测量结果可以是WLAN接入点的信号质量，或是信号强度，或是其他能反映出WLAN接入点信号质量和强度的值，并不限于此。
在本发明的一个实施例中，上述传输装置32，还可以设置为向终端发送无线资源控制RRC连接重配信令；其中，RRC连接重配信令中包括：与目标WLAN汇聚单元对应的WLAN的接入点的标识。
在本发明的一个实施例中，上述传输装置32，还可以设置为在基站接收到目标WLAN汇聚单元发送的用于指示终端已经连接到目标WLAN汇聚单元的连接确认消息，和/或基站接收到终端发送的用于指示终端已经连接到目标WLAN汇聚单元的连接状态报告消息后，向目标WLAN汇聚单元发送下行数据包；或者，从目标WLAN汇聚单元接收终端发送的上行数据包。
在本发明的一个实施例中，上述传输装置32还可以设置为接收源WLAN汇聚单元发送的状态传递报告消息；其中，状态传递报告消息中包括以下至少之一参数：已经成功发送给终端的多个数据包的序列号中的最大序列号；丢失的数据包的序列号；未成功发送的数据包的序列号。
需要说明的是，上述传输装置32还可以设置为在接收到的源WLAN汇聚单元发送的状态传递报告消息中包括已经成功发送给所述终端的多个数据包的序列号中的最大序列号的情况下，将基站中存储的第一指定数据包发送给所述目标WLAN汇聚单元；和/或，在接收到的源WLAN汇聚单元发送的状态传递报告消息中包括丢失的数据包的序列号的情况下，将基站中存储的第二指定数据包发送给所述目标WLAN汇聚单元；和/或， 在接收到的源WLAN汇聚单元发送的状态传递报告消息中包括未成功发送的数据包的序列号的情况下，将基站中存储的第三指定数据包发送给所述目标WLAN汇聚单元；其中，所述第一指定数据包的序列号大于所述最大序列号；所述第二指定数据包的序列号等于所述丢失的数据包的序列号；所述第三指定数据包的序列号等于所述未成功发送的数据包的序列号。
实施例4
本发明实施例还提供了一种系统，该系统包括：基站、终端、目标无线局域网WLAN汇聚单元和源WLAN汇聚单元；其中，所述基站，设置为向所述目标WLAN汇聚单元请求所述目标WLAN汇聚单元为所述终端分配用于WLAN汇聚的WLAN资源；以及在接收到所述目标WLAN汇聚单元返回的同意所述请求的确认信息后，向所述源WLAN汇聚单元请求释放所述源WLAN汇聚单元为所述终端分配的WLAN资源。
在本发明的一个实施例中，上述终端，可以设置为在以下事件发生时，向上述基站发送测量报告：WLAN接入点列表中的WLAN接入点的测量结果都低于第一门限值；且存在WLAN接入点列表之外的WLAN接入点的测量结果高于第二门限值；其中，第一门限值小于或者等于第二门限值；其中，测量报告中携带终端上保存的WLAN接入点列表之外的其他WLAN接入点的标识；其他WLAN接入点标识与目标WLAN汇聚单元是对应的。
需要说明的是，上述测量结果可以是WLAN接入点的信号质量，或是信号强度，或是其他能反映出WLAN接入点信号质量和强度的值，并不限于此。
在本发明的一个实施例中，上述基站，还可以设置为接收源WLAN汇聚单元发送的状态传递报告消息；其中，上述状态传递报告消息中可以包括以下至少之一参数：已经成功发送给终端的多个数据包的序列号中的最大序列号；丢失的数据包的序列号；未成功发送的数据包的序列号；基 站，还设置为在所述状态传递报告消息中包括所述最大序列号的情况下，将基站中存储的第一指定数据包发送给所述目标WLAN汇聚单元；和/或，在所述状态传递报告消息中包括所述丢失的数据包的序列号的情况下，将基站中存储的第二指定数据包发送给所述目标WLAN汇聚单元；和/或，在所述状态传递报告消息中包括所述未成功发送的数据包的序列号的情况下，将基站中存储的第三指定数据包发送给所述目标WLAN汇聚单元；其中，所述第一指定数据包的序列号大于所述最大序列号；所述第二指定数据包的序列号等于所述丢失的数据包的序列号；所述第三指定数据包的序列号等于所述未成功发送的数据包的序列号。
实施例5
本发明的实施例还提供了一种存储介质。可选地，在本实施例中，上述存储介质可以被设置为存储用于执行上述任一项所述的方法的步骤的程序代码。
可选地，在本实施例中，上述存储介质可以包括但不限于：U盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、移动硬盘、磁碟或者光盘等各种可以存储程序代码的介质。
可选地，在本实施例中，处理器根据存储介质中已存储的程序代码执行上述任一项的方法的步骤。
可选地，本实施例中的具体示例可以参考上述实施例及可选实施方式中所描述的示例，本实施例在此不再赘述。
为了更好的理解本发明，以下结合优选的实施例对本发明做进一步解释。
为了保证业务连续性，数据不丢失，本发明优选实施例提供的一种方法：基站通过给终端配置测量事件，并在收到终端的测量报告后，先连接到需要变更的目标WLAN汇聚单元上，然后再确定连接成功后再断开与源WLAN汇聚单元的连接，最后再通知UE连接到新的WLAN接入点， 数据同时转发到目标WLAN汇聚单元，不丢失。
需要说明的是，在本发明优选实施例中，UE表示终端，eNB表示基站，用S-WT表示源WLAN汇聚单元，用T-WT表示目标WLAN汇聚单元。
优选实施例1
场景：终端支持LTE与WLAN汇聚，并在基站的指示下，使用LTE与WLAN汇聚技术进行数据传输，这期间基站的指示中还包括WT所管理的WLAN接入点列表。WLAN接入点列表是基站从WT获得。
图4是根据本发明优选实施例1提供的WLAN汇聚单元变更方法的流程示意图，如图4所示，该方法包括：
步骤1、基站给终端下发测量配置，指示终端在发生以下定义的事件时，向基站发送测量报告：
事件W：所有WLAN接入点列表中的WLAN接入点的测量结果都低于门限值(threshold)1，同时存在WLAN接入点列表之外的其他WLAN接入点的测量结果高于门限值(threshold)2.这里，测量结果可以是WLAN接入点的信号质量，或是信号强度，或是其他能反映出WLAN接入点信号质量和强度的值。
步骤2、终端在判断事件发生时发送测量报告给基站，其中，报告中还包扩事件描述中所述的WLAN接入点列表之外的WLAN接入点的标识。
需要说明的是，上述步骤1和2可以作为触发WT(WLAN汇聚单元的缩写)变更的其中一种条件。
步骤3、基站发送WT addition request信令(相当于上述实施例中的请求信令)给目标WT，向WT请求WLAN资源。
步骤4、如果目标WT能够完全满足或者部分满足基站请求的资源，则发送WT添加请求确认(addition request Acknowledge)(相当于上述实 施例中的响应信令)。该信令用于通知基站，同意基站的资源请求。
步骤5、在接收到目标WT发送的WT addition request Acknowledge信令后，基站发送WT释放请求(release request)信令相当于上述实施例中的释放请求信令)给源WT，请求源WT释放之前分配的WLAN资源。
步骤6、基站发送RRC Connection Reconfiguration信令(相当于上述实施例中的RRC连接重配信令)给终端，其中包含新的WLAN的配置信息。
步骤7、终端保存新的配置信息，并作为响应，发送RRC连接重配完成(Connection Reconfiguration Complete)信令给基站。
步骤8、根据新的配置信息，终端连接到目标WT。
步骤9、目标WT发送WT连接确认(Association Confirmation)(相当于上述实施例中的连接确认消息)给基站，指示终端已经连接到该WT。
或者，
步骤10、终端还可以发送WLAN连接状态报告(Connection Status Report)消息(相当于上述实施例中的连接状态报告消息)给基站，指示其已经连接到目标WT。
需要说明的是：相对于步骤9，步骤10是对其的一个补充，终端可以发送这个消息也可以不发送。
在接收到目标WT发送的WT Association Confirmation之后，基站认为终端已经连接到目标WT，可以将需要发送到该终端的下行数据发送到目标WT或者从目标WT接收该终端发送的上行数据。
优选实施例2
图5是根据本发明优选实施例2提供的WLAN汇聚单元变更方法的流程示意图，如图5所示，该方法包括：
步骤1、基站给终端下发测量配置，指示终端在发生以下定义的事件 时，向基站发送测量报告：
事件W：所有WLAN接入点列表中的WLAN接入点的测量结果都低于门限值(threshold)1，同时存在WLAN接入点列表之外的其他WLAN接入点的测量结果高于门限值(threshold)2.这里，测量结果可以是WLAN接入点的信号质量，或是信号强度，或是其他能反映出WLAN接入点信号质量和强度的值。
步骤2、终端在判断事件发生时发送测量报告给基站，其中，报告中还包扩事件描述中所述的WLAN接入点列表之外的WLAN接入点的标识。
需要说明的是，上述两个步骤可以作为触发WT(WLAN汇聚单元的缩写)变更的其中一种条件。
步骤3、基站发送WT添加请求(addition request)信令给目标WT，向WT请求WLAN资源。
步骤4、如果目标WT能够完全满足或者部分满足基站请求的资源，则发送WT添加请求确认(addition request Acknowledge)。该信令用于通知基站，同意基站的资源请求。
步骤5、在接收到目标WT发送的WT addition request Acknowledge信令后，基站发送WT释放请求(release request)信令给源WT，请求源WT释放之前分配的WLAN资源。
步骤6、源WT发送WT状态传递报告(Status Delivery Report)消息给基站，该消息中包含以下参数的一个或多个：
1)已经成功发送到终端的数据包的最高序列号
2)丢失的数据包序列号或未成功发送的数据包序列号
步骤7、基站发送RRC连接重配(Connection Reconfiguration)信令给终端，其中包含新的WLAN的配置信息。
步骤8、终端保存新的配置信息，并作为响应，发送RRC连接重配 完成(Connection Reconfiguration Complete)信令给基站。
步骤9、根据新的配置信息，终端连接到目标WT。
步骤10、目标WT发送WT连接确认(Association Confirmation)给基站，指示终端已经连接到该WT。
或者，
步骤11、终端还可以发送WLAN连接状态报告(Connection Status Report)消息给基站，指示其已经连接到目标WT。
注：相对于第10步骤，11步骤对其的一个补充，终端可以发送这个消息也可以不发送。
在接收到目标WT发送的WT连接确认(Association Confirmation)之后，基站认为终端已经连接到目标WT，可以将需要发送到该终端的下行数据发送到目标WT或者从目标WT接收该终端发送的上行数据。
其中，下行数据包发送到目标WT具体为：根据步骤6中源WT发送的消息中的参数，如果包含已经成功发送到终端的数据包的最高序列号，则发送基站中存储的序列号大于所述最高序列号的数据包到目标WT，如果丢失的数据包序列号或未成功发送的数据包序列号，则发送序列号等于该序列号的数据包到目标WT。例如，源WT反馈给基站发送成功的最高序列号是115，同时反馈丢失数据包的序列号是58，59，60。则基站发送序号为58，59，60，116，117......的数据包给目标WT。
显然，本领域的技术人员应该明白，上述的本发明的各模块或各步骤可以用通用的计算装置来实现，它们可以集中在单个的计算装置上，或者分布在多个计算装置所组成的网络上，可选地，它们可以用计算装置可执行的程序代码来实现，从而，可以将它们存储在存储装置中由计算装置来执行，并且在某些情况下，可以以不同于此处的顺序执行所示出或描述的步骤，或者将它们分别制作成各个集成电路模块，或者将它们中的多个模块或步骤制作成单个集成电路模块来实现。这样，本发明不限制于任何特 定的硬件和软件结合。
以上所述仅为本发明的优选实施例而已，并不用于限制本发明，对于本领域的技术人员来说，本发明可以有各种更改和变化。凡在本发明的精神和原则之内，所作的任何修改、等同替换、改进等，均应包含在本发明的保护范围之内。
工业实用性
基于本发明实施例提供的上述技术方案，由于所述基站在接收到所述目标WLAN汇聚单元返回的同意为终端分配用于WLAN汇聚的WLAN资源的确认信息后，才向源WLAN汇聚单元请求释放所述源WLAN汇聚单元为所述终端分配的WLAN资源，使得终端在移动过程能够继续保持WLAN的连接，可以保证数据不会丢失，因此，可以解决相关技术中，终端在基站的控制下，变更到新的WLAN汇聚单元会导致数据丢失的问题，保证了业务的连续性。

Claims (28)

  1. 一种WLAN汇聚单元变更方法，包括：
    基站向目标无线局域网WLAN汇聚单元请求所述目标WLAN汇聚单元为终端分配用于WLAN汇聚的WLAN资源；
    所述基站在接收到所述目标WLAN汇聚单元返回的同意所述请求的确认信息后，向源WLAN汇聚单元请求释放所述源WLAN汇聚单元为所述终端分配的WLAN资源。
  2. 根据权利要求1所述的方法，其中，在基站向目标无线局域网WLAN汇聚单元请求所述目标WLAN汇聚单元为终端分配用于WLAN汇聚的WLAN资源之前，所述方法还包括：
    所述基站接收所述终端发送的测量报告；其中，所述测量报告中携带所述终端上保存的WLAN接入点列表之外的其他WLAN接入点的标识。
  3. 根据权利要求2所述的方法，其中，所述测量报告为在以下事件发生时，所述终端发送给所述基站的测量报告：
    所述WLAN接入点列表中的WLAN接入点的测量结果都低于第一门限值；且存在WLAN接入点列表之外的WLAN接入点的测量结果高于第二门限值。
  4. 根据权利要求1所述的方法，其中，在向源WLAN汇聚单元请求释放所述源WLAN汇聚单元为所述终端分配的WLAN资源之后，所述方法还包括：
    所述基站向所述终端发送无线资源控制RRC连接重配信令；其中，所述RRC连接重配信令中包括：与所述目标WLAN汇聚单元对应的WLAN的接入点的标识。
  5. 根据权利要求4所述的方法，其中，在所述基站向终端发送RRC连接重配信令之后，所述方法还包括：
    在所述基站接收到所述目标WLAN汇聚单元发送的用于指示所述终端已经连接到所述目标WLAN汇聚单元的连接确认消息，和/或所述基站接收到所述终端发送的用于指示所述终端已经连接到所述目标WLAN汇聚单元的连接状态报告消息后，所述基站向所述目标WLAN汇聚单元发送下行数据包，或者所述基站从所述目标WLAN汇聚单元接收所述终端发送的上行数据包。
  6. 根据权利要求1至5中任一项所述的方法，其中，在向源WLAN汇聚单元请求释放所述源WLAN汇聚单元为所述终端分配的WLAN资源之后，所述方法还包括：
    所述基站接收所述源WLAN汇聚单元发送的状态传递报告消息；其中，所述状态传递报告消息中包括以下至少之一参数：
    已经成功发送给所述终端的多个数据包的序列号中的最大序列号；
    丢失的数据包的序列号；
    未成功发送的数据包的序列号。
  7. 根据权利要求5所述的方法，其中，
    在接收到的源WLAN汇聚单元发送的状态传递报告消息中包括已经成功发送给所述终端的多个数据包的序列号中的最大序列号的情况下，所述基站向目标WLAN汇聚单元发送下行数据包包括：所述基站将基站中存储的第一指定数据包发送给所述目标WLAN汇聚单元；其中，所述第一指定数据包的序列号大于所述最大序列号。
  8. 根据权利要求5所述的方法，其中，
    在接收到的源WLAN汇聚单元发送的状态传递报告消息中包括丢失的数据包的序列号的情况下，所述基站向目标WLAN汇聚单元发送下行数据包包括：将基站中存储的第二指定数据包发送给所述目标WLAN汇聚单元；其中，所述第二指定数据包的序列号等于所述丢失的数据包的序列号。
  9. 根据权利要求5所述的方法，其中，
    在接收到的源WLAN汇聚单元发送的状态传递报告消息中包括未成功发送的数据包的序列号的情况下，所述基站向目标WLAN汇聚单元发送下行数据包包括：将基站中存储的第三指定数据包发送给所述目标WLAN汇聚单元；其中，所述第三指定数据包的序列号等于所述未成功发送的数据包的序列号。
  10. 一种WLAN汇聚单元变更装置，包括：
    第一请求模块，设置为向目标无线局域网WLAN汇聚单元请求所述目标WLAN汇聚单元为终端分配用于WLAN汇聚的WLAN资源；
    第一接收模块，设置为接收所述目标WLAN汇聚单元返回的同意所述请求的确认信息；
    第二请求模块，设置为向源WLAN汇聚单元请求释放所述源WLAN汇聚单元为所述终端分配的WLAN资源。
  11. 根据权利要求10所述的装置，其中，所述装置还包括：所述第一接收模块，设置为接收所述终端发送的测量报告；其中，所述测量报告中携带所述终端上保存的WLAN接入点列表之外的其他WLAN接入点的标识。
  12. 根据权利要求11所述的装置，其中，所述装置还包括：第 一发送模块，设置为向所述终端发送无线资源控制RRC连接重配信令；其中，所述RRC连接重配信令中包括：与所述目标WLAN汇聚单元对应的WLAN的接入点的标识。
  13. 根据权利要求12所述的装置，其中，所述装置还包括：
    第二发送模块，设置为在基站接收到所述目标WLAN汇聚单元发送的用于指示所述终端已经连接到所述目标WLAN汇聚单元的连接确认消息，和/或基站接收到所述终端发送的用于指示所述终端已经连接到所述目标WLAN汇聚单元的连接状态报告消息后，向所述目标WLAN汇聚单元发送下行数据包；或者，
    第二接收模块，设置为在基站接收到所述目标WLAN汇聚单元发送的用于指示所述终端已经连接到所述目标WLAN汇聚单元的连接确认消息，和/或基站接收到所述终端发送的用于指示所述终端已经连接到所述目标WLAN汇聚单元的连接状态报告消息后，从所述目标WLAN汇聚单元接收所述终端发送的上行数据包。
  14. 根据权利要求10至13中任一项所述的装置，其中，所述装置还包括：
    第三接收模块，设置为接收所述源WLAN汇聚单元发送的状态传递报告消息；其中，所述状态传递报告消息中包括以下至少之一参数：已经成功发送给所述终端的多个数据包的序列号中的最大序列号；丢失的数据包的序列号；未成功发送的数据包的序列号。
  15. 根据权利要求13所述的装置，其中，
    在所述装置的第三接收模块接收到的源WLAN汇聚单元发送的状态传递报告消息中包括已经成功发送给所述终端的多个数据包的序列号中的最大序列号的情况下，所述第二发送模块，还设置为将基 站中存储的第一指定数据包发送给所述目标WLAN汇聚单元；其中，所述第一指定数据包的序列号大于所述最大序列号。
  16. 根据权利要求13所述的装置，其中，
    在所述装置的第三接收模块接收到的源WLAN汇聚单元发送的状态传递报告消息中包括丢失的数据包的序列号的情况下，所述第二发送模块，还设置为将基站中存储的第二指定数据包发送给所述目标WLAN汇聚单元；其中，所述第二指定数据包的序列号等于所述丢失的数据包的序列号。
  17. 根据权利要求13所述的装置，其中，
    在所述装置的第三接收模块接收到的源WLAN汇聚单元发送的状态传递报告消息中包括未成功发送的数据包的序列号的情况下，所述第二发送模块，还设置为将基站中存储的第三指定数据包发送给所述目标WLAN汇聚单元；其中，所述第三指定数据包的序列号等于所述未成功发送的数据包的序列号。
  18. 一种基站，包括：
    传输装置，设置为向目标无线局域网WLAN汇聚单元请求所述目标WLAN汇聚单元为终端分配用于WLAN汇聚的WLAN资源；以及在接收所述目标WLAN汇聚单元返回的同意所述请求的确认信息后，向源WLAN汇聚单元请求释放所述源WLAN汇聚单元为所述终端分配的WLAN资源。
  19. 根据权利要求18所述的基站，其中，所述传输装置还设置为接收终端发送的测量报告；其中，所述测量报告中携带所述终端上保存的WLAN接入点列表之外的其他WLAN接入点的标识。
  20. 根据权利要求18所述的基站，其中，所述传输装置，还设 置为向终端发送无线资源控制RRC连接重配信令；其中，所述RRC连接重配信令中包括：与所述目标WLAN汇聚单元对应的WLAN的接入点的标识。
  21. 根据权利要求20所述的基站，其中，所述传输装置，还设置为在基站接收到所述目标WLAN汇聚单元发送的用于指示所述终端已经连接到所述目标WLAN汇聚单元的连接确认消息，和/或基站接收到所述终端发送的用于指示所述终端已经连接到所述目标WLAN汇聚单元的连接状态报告消息后，向所述目标WLAN汇聚单元发送下行数据包；或者，从所述目标WLAN汇聚单元接收所述终端发送的上行数据包。
  22. 根据权利要求18至21中任一项所述的基站，其中，所述传输装置还设置为接收所述源WLAN汇聚单元发送的状态传递报告消息；其中，所述状态传递报告消息中包括以下至少之一参数：已经成功发送给所述终端的多个数据包的序列号中的最大序列号；丢失的数据包的序列号；未成功发送的数据包的序列号。
  23. 根据权利要求18所述的基站，其中，
    所述传输装置还设置为在接收到的源WLAN汇聚单元发送的状态传递报告消息中包括已经成功发送给所述终端的多个数据包的序列号中的最大序列号的情况下，将基站中存储的第一指定数据包发送给所述目标WLAN汇聚单元；和/或，在接收到的源WLAN汇聚单元发送的状态传递报告消息中包括丢失的数据包的序列号的情况下，将基站中存储的第二指定数据包发送给所述目标WLAN汇聚单元；和/或，在接收到的源WLAN汇聚单元发送的状态传递报告消息中包括未成功发送的数据包的序列号的情况下，将基站中存储的第三指定数据包发送给所述目标WLAN汇聚单元；其中，所述第一指定数据包的序列号大于所述最大序列号；所述第二指定数据包的序列号等于所 述丢失的数据包的序列号；所述第三指定数据包的序列号等于所述未成功发送的数据包的序列号。
  24. 一种系统，包括：基站、终端、目标无线局域网WLAN汇聚单元和源WLAN汇聚单元；
    所述基站，设置为向所述目标WLAN汇聚单元请求所述目标WLAN汇聚单元为所述终端分配用于WLAN汇聚的WLAN资源；以及在接收到所述目标WLAN汇聚单元返回的同意所述请求的确认信息后，向所述源WLAN汇聚单元请求释放所述源WLAN汇聚单元为所述终端分配的WLAN资源。
  25. 根据权利要求24所述的系统，其中，所述终端，设置为在以下事件发生时，向所述基站发送测量报告：
    所述WLAN接入点列表中的WLAN接入点的测量结果都低于第一门限值；且存在WLAN接入点列表之外的WLAN接入点的测量结果高于第二门限值；
    其中，所述测量报告中携带所述终端上保存的WLAN接入点列表之外的其他WLAN接入点的标识。
  26. 根据权利要求24所述的系统，其中，所述基站，还设置为接收所述源WLAN汇聚单元发送的状态传递报告消息；其中，所述状态传递报告消息中包括以下至少之一参数：已经成功发送给所述终端的多个数据包的序列号中的最大序列号；丢失的数据包的序列号；未成功发送的数据包的序列号；
    所述基站，还设置为在所述状态传递报告消息中包括所述最大序列号的情况下，将基站中存储的第一指定数据包发送给所述目标WLAN汇聚单元；和/或，在所述状态传递报告消息中包括所述丢失 的数据包的序列号的情况下，将基站中存储的第二指定数据包发送给所述目标WLAN汇聚单元；和/或，在所述状态传递报告消息中包括所述未成功发送的数据包的序列号的情况下，将基站中存储的第三指定数据包发送给所述目标WLAN汇聚单元；其中，所述第一指定数据包的序列号大于所述最大序列号；所述第二指定数据包的序列号等于所述丢失的数据包的序列号；所述第三指定数据包的序列号等于所述未成功发送的数据包的序列号。
  27. 一种存储介质，其特征在于，所述存储介质包括存储的程序，其中，所述程序运行时执行权利要求1至9中任一项所述的方法。
  28. 一种处理器，其特征在于，所述处理器用于运行程序，其中，所述程序运行时执行权利要求1至9中任一项所述的方法。
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CN101888631A (zh) * 2009-05-11 2010-11-17 华为终端有限公司 一种接入网的切换方法、系统和设备
CN104349507A (zh) * 2013-08-08 2015-02-11 电信科学技术研究院 一种切换方法和装置
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