WO2016161723A1 - 传输业务数据流的方法和系统 - Google Patents

传输业务数据流的方法和系统 Download PDF

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Publication number
WO2016161723A1
WO2016161723A1 PCT/CN2015/085863 CN2015085863W WO2016161723A1 WO 2016161723 A1 WO2016161723 A1 WO 2016161723A1 CN 2015085863 W CN2015085863 W CN 2015085863W WO 2016161723 A1 WO2016161723 A1 WO 2016161723A1
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Prior art keywords
data stream
base station
service data
pdcp
access point
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English (en)
French (fr)
Inventor
雷艺学
李明菊
张云飞
何成名
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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Yulong Computer Telecommunication Scientific Shenzhen Co Ltd
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W28/00—Network traffic management; Network resource management
    • H04W28/02—Traffic management, e.g. flow control or congestion control
    • H04W28/10—Flow control between communication endpoints

Definitions

  • the present invention relates to the field of communications technologies, and in particular, to a method for transmitting a service data stream and a system for transmitting a service data stream.
  • LTE Long Term Evolution
  • LTE The -A Long Term Evolution-Advanced
  • WLAN Wireless Local Area Network
  • FIG. 1 it is a schematic diagram of an architecture of existing LTE and WLAN integration.
  • the user traffic transmitted by the WLAN secondary cell is not part of the radio access bearer between the terminal and the access network element eNB, resulting in the following defects and problems:
  • the backhaul (channel) of the cellular network with high quality of service cannot be utilized to support service data transmission.
  • the invention is based on the above problems, and proposes a new technical solution, which can realize wireless local area network aggregation in the access layer, effectively utilizes the wireless local area network access point for traffic sharing, and thus more flexibly adapts to the wireless link.
  • an aspect of the present invention provides a method for transmitting a service data stream, including: when a base station and a terminal transmit a service data stream, the base station determines whether a wireless local area network access point and the terminal are required to be Performing transmission of the service data stream; when the determination result is yes, the base station performs segmentation on the service data stream to transmit the service data stream.
  • the base station determines that it is necessary to simultaneously transmit the service data stream through the WLAN access point and directly (ie, through the cellular network, including LTE)
  • the data service flow is segmented to implement Wireless local area network (WLAN) aggregation at the access layer (AS layer), effectively utilizing WLAN access points for traffic sharing, thereby more flexibly adapting to wireless links
  • WLAN Wireless local area network
  • AS layer access layer
  • the base station performs segmentation on the service data flow to transmit the service data flow, and specifically includes: allocating a bearer to the base station and the terminal;
  • the service data stream is followed by a PDCP layer (Packet Data Convergence Protocol, one of the protocol layers of the 3GPP radio access side) or a PDCP layer and an RLC layer (Radio Link Control, Radio Link Control Protocol).
  • the transmitting side of the protocol layer of the 3GPP radio access side is processed to encapsulate the sliced service data stream into a PDCP layer protocol packet or a PDCP/RLC layer protocol packet respectively; and the PDCP layer protocol packet is Or the PDCP/RLC layer protocol packet is transmitted through the bearer with a uniform sequence number.
  • the bandwidth generally refers to the bandwidth occupied by the signal
  • the large bandwidth is a relative amount, relative to the available rate of each wireless interface, such as A terminal's LTE radio interface can have 1 Mb/s bandwidth, so a 4 Mb/s bandwidth service traffic can be called a large bandwidth, that is, a large bandwidth can be described as a data rate exceeding the bandwidth expected by the user on the LTE radio interface.
  • the base station When the service data stream is occupied, the base station first allocates a bearer (transport carrier) for the base station and the terminal, and when the uplink and downlink transmission of the service data stream, the base station can perform wireless according to the wireless local area network access point and the cellular network.
  • the transmission quality of the link performs bit (bit) granularity segmentation on the service data stream, and the sliced service data stream is processed by the PDCP layer or the PDCP layer and the RLC layer, and encapsulated into a PDCP layer protocol packet or
  • the PDCP/RLC layer protocol packet is transmitted through the assigned bearer with a uniform sequence number, so that the WLAN can be fully utilized for flexible and efficient traffic. Converged transmission enables WLAN traffic to achieve high quality of service by means of the backhaul of the cellular network. Moreover, by using a uniform sequence number for transmission, it is possible to effectively avoid the disorder of protocol packet transmission.
  • the general bandwidth (the general bandwidth is also a relative amount, which means that the service data stream can be carried only by the LTE radio interface even if the service data stream is not segmented)
  • the service data stream can be transmitted based on each service data.
  • the stream or bearer is split.
  • the base station adjusts a data stream transmission ratio of the wireless local area network wireless interface and the cellular network wireless interface according to a wireless local area network wireless interface and a transmission quality of the cellular network wireless interface.
  • the service data flow transmitted through the wireless local area network wireless interface and the cellular network wireless interface needs to be dynamically balanced to avoid affecting the overall throughput improvement, and the base station can be based on the wireless local area network wireless interface and the cellular network wireless
  • the transmission quality of the interface adjusts its data stream transmission ratio to further fully WLAN for flexible and efficient traffic aggregation transmission.
  • the transmission quality includes: a packet loss rate and a transmission delay; and the WLAN access point reports an average delay of the WLAN air interface to the base station, and the WLAN The access point and/or the base station inserts a timestamp in the PDCP layer protocol packet or the PDCP/RLC layer protocol packet at a preset time interval to dynamically monitor the wireless local area network access point and the base station The transmission delay.
  • the transmission quality of the wireless local area network wireless interface and the cellular network wireless interface includes, but is not limited to, a packet loss rate and a transmission delay, a packet loss rate, and a PDCP layer protocol packet or a PDCP/RLC layer protocol packet (packet) length.
  • the packet transmission frequency is related, and the transmission delay needs to consider the WLAN air interface delay and the delay of the data packet from the WLAN access point to the base station for forwarding.
  • the WLAN access point can report the average delay of the WLAN air interface to the base station.
  • the WLAN access point and/or the base station can dynamically insert the timestamp at a preset time interval in the PDCP layer protocol packet or the PDCP/RLC layer protocol packet to dynamically monitor the transmission delay between the WLAN access point and the base station.
  • the WLAN access point can be further effectively utilized for traffic sharing, thereby more flexibly adapting to the quality change of the wireless link.
  • the base station sends the PDCP layer protocol packet or a PDCP/RLC layer protocol packet as a payload of the wireless local area network wireless interface to the wireless local area network access point
  • the WLAN access point sends the PDCP layer protocol packet or the PDCP/RLC layer protocol packet to the terminal for processing on the PDCP layer or the PDCP layer and the RLC layer to complete the transmission of the service data stream.
  • the base station processes the segmented downlink service data stream through the PDCP layer or the PDCP layer and the RLC layer, and then encapsulates it into a PDCP layer protocol packet or PDCP/RLC.
  • Layer protocol packet and send it as a payload of the wireless local area network (WLAN RAT) to the wireless local area network access point (AP), and then through the wireless local area network access point (AP) and terminal (
  • WLAN RAT wireless local area network
  • AP wireless local area network access point
  • the UE) interface is transmitted to the terminal to perform PDCP layer or PDCP layer and PDC layer on the receiving side of the RLC layer for the PDCP layer protocol packet or the PDCP/RLC layer protocol packet. Processed and then handed over to the top of the terminal.
  • the method before the base station severifies the service data stream, the method further includes: establishing a logical interface between the WLAN access point and the base station, for using a data plane Transmission of LTE protocol data between the WLAN access point and the base station.
  • a logical interface is established between the WLAN access point and the base station before the base station severs the service data stream, and the LTE protocol data for the data plane is used in the WLAN access point and the base station.
  • the logical interface can be wired or wireless, so that there is no direct logical interface between the WLAN access point and the core network, when the base station and the WLAN access point are co-located
  • the logical interface becomes the internal interface of the network element.
  • the control signaling can be hidden by the base station, and the scalability is also improved.
  • Another aspect of the present invention provides a method for transmitting a service data stream, including: when a terminal and a base station transmit a service data stream, the terminal determines whether it is required to perform the foregoing by using a WLAN access point with the base station The transmission of the service data stream; when the determination result is yes, the terminal segments the service data stream to transmit the service data stream.
  • the terminal determines that the service data stream needs to be transmitted through the WLAN access point and directly (ie, through the cellular network, including LTE) and the base station
  • the data service flow is segmented to implement Wireless local area network (WLAN) aggregation at the access layer (AS layer), effectively utilizing WLAN access points for traffic sharing, thereby more flexibly adapting to the quality changes of the wireless link, and enabling wireless local area networks (WLAN) Traffic is achieved by the backhaul of the cellular network to achieve high quality of service.
  • WLAN Wireless local area network
  • AS layer access layer
  • the terminal is configured to perform the segmentation of the service data flow to transmit the service data flow, and specifically includes: allocating a bearer to the base station and the terminal;
  • the service data stream is followed by a PDCP layer (Packet Data Convergence Protocol, one of the protocol layers of the 3GPP radio access side) or a PDCP layer and an RLC layer (Radio Link Control, Radio Link Control Protocol).
  • the transmitting side of the protocol layer of the 3GPP radio access side is processed to encapsulate the sliced service data stream into a PDCP layer protocol packet or a PDCP/RLC layer protocol packet respectively; and the PDCP layer protocol packet is Or the PDCP/RLC layer protocol packet is transmitted through the bearer with a uniform sequence number.
  • band Width generally refers to the bandwidth occupied by the signal.
  • the large bandwidth is a relative amount.
  • a terminal can have 1 Mb/s bandwidth on the LTE radio interface, then a 4 Mb/s bandwidth.
  • the terminal When the service traffic can be called a large bandwidth, that is, a large bandwidth can be described as a data rate exceeding the bandwidth occupied by the user on the LTE radio interface, the terminal first allocates a bearer to the base station and the terminal (transport carrier) ), in the uplink and downlink transmission of the service data stream, the terminal may perform bit (bit) granularity segmentation on the service data stream according to the transmission quality of the wireless local area network access point and the wireless link of the cellular network, and segmentation
  • the subsequent service data stream is processed by the PDCP layer or the PDCP layer and the RLC layer, and is encapsulated into a PDCP layer protocol packet or a PDCP/RLC layer protocol packet, and transmitted through the allocated bearer with a uniform sequence number.
  • the service data stream can be transmitted based on each service data.
  • the flow or bearer is segmented, and on the terminal side, the traffic shaping of the per-bearer (by bearer) can be implemented by using a Traffic Flow Template (TFT), and the granularity of the base station can be divided into service data streams. It is consistent with the terminal side and may not be consistent.
  • TFT Traffic Flow Template
  • the terminal adjusts a data stream transmission ratio of the wireless local area network wireless interface and the cellular network wireless interface according to a wireless local area network wireless interface and a transmission quality of the cellular network wireless interface.
  • the service data stream transmitted through the wireless local area network wireless interface and the cellular network wireless interface needs to be dynamically balanced to avoid affecting the overall throughput improvement, and the terminal can be wireless according to the wireless local area network wireless network and the cellular network.
  • the transmission quality of the interface adjusts its data stream transmission ratio to further fully WLAN for flexible and efficient traffic aggregation transmission.
  • the transmission quality includes: a packet loss rate and a transmission delay; and the WLAN access point reports an average delay of the WLAN air interface to the base station, and the WLAN The access point and/or the base station inserts a timestamp in the PDCP layer protocol packet or the PDCP/RLC layer protocol packet at a preset time interval to dynamically monitor the WLAN connection The transmission delay between the ingress point and the base station.
  • the transmission quality of the wireless local area network wireless interface and the cellular network wireless interface includes, but is not limited to, a packet loss rate and a transmission delay, a packet loss rate, and a PDCP layer protocol packet or a PDCP/RLC layer protocol packet (packet) length.
  • the packet transmission frequency is related, and the transmission delay needs to consider the WLAN air interface delay and the delay of the data packet from the WLAN access point to the base station for forwarding.
  • the WLAN access point can report the average delay of the WLAN air interface to the base station.
  • the WLAN access point and/or the base station can dynamically insert the timestamp at a preset time interval in the PDCP layer protocol packet or the PDCP/RLC layer protocol packet to dynamically monitor the transmission delay between the WLAN access point and the base station.
  • the WLAN access point can be further effectively utilized for traffic sharing, thereby more flexibly adapting to the quality change of the wireless link.
  • the terminal sends the PDCP layer protocol packet or the PDCP/RLC layer protocol packet as a payload of the wireless local area network wireless interface to the wireless local area network access point, and
  • the WLAN access point sends the PDCP layer protocol packet or the PDCP/RLC layer protocol packet to the base station for processing on the PDCP layer or the PDCP layer and the RLC layer to complete the transmission of the service data stream.
  • the uplink service data stream is segmented in the terminal, and a part of the uplink service data stream is processed by the PDCP layer and/or the PDCP layer and the RLC layer, and then encapsulated into a PDCP layer protocol packet or PDCP.
  • /RLC layer protocol packet and send it as a payload of the wireless local area network (WLAN RAT) to the wireless local area network access point (AP), and then through the wireless local area network access point (AP)
  • the base station (eNB) interface is transmitted to the base station (eNB) to perform PDCP layer or PDCP layer and RLC layer receiving side processing on the PDCP layer protocol packet or the PDCP/RLC layer protocol packet.
  • the method further includes: establishing a logical interface between the WLAN access point and the base station, for using a data plane Transmission of LTE protocol data between the WLAN access point and the base station.
  • a logical interface is established between the WLAN access point and the base station, and the LTE protocol data for the data plane is used in the WLAN access point and the base station.
  • the logical interface can be wired or wireless, so that there is no direct logical interface between the WLAN access point and the core network, then when the base station and the wireless When the local area network access point is co-located, the logical interface becomes the internal interface of the network element.
  • the control signaling can be hidden by the base station, and the scalability is also improved.
  • a further aspect of the present invention provides a system for transmitting a service data stream, comprising: a base station and a WLAN access point, wherein when the base station and the terminal transmit a service data stream, the base station determines whether it needs to pass The WLAN access point performs the transmission of the service data stream with the terminal; when the determination result is YES, the base station is configured to segment the service data stream to transmit the service data stream.
  • the base station determines that it is necessary to simultaneously transmit the service data stream through the WLAN access point and directly (ie, through the cellular network, including LTE) and the terminal, the data service flow is segmented to Realize wireless local area network (WLAN) aggregation at the access layer (AS layer), effectively utilize WLAN access points for traffic sharing, thereby more flexibly adapting to the quality changes of wireless links, and enabling wireless local area networks ( WLAN) traffic achieves high quality of service by the backhaul of the cellular network.
  • WLAN wireless local area network
  • the base station is specifically configured to: allocate a bearer to the base station and the terminal; perform the processing of the split service data stream on a PDCP layer or a PDCP layer and an RLC layer.
  • the packet of the service data stream is encapsulated into a PDCP layer protocol packet or a PDCP/RLC layer protocol packet, respectively, and the PDCP layer protocol packet or the PDCP/RLC layer protocol packet is passed through the bearer with a uniform sequence number. Transfer.
  • the bandwidth generally refers to the bandwidth occupied by the signal
  • the large bandwidth is a relative amount, relative to the available rate of each wireless interface, such as A terminal's LTE radio interface can have 1 Mb/s bandwidth, so a 4 Mb/s bandwidth service traffic can be called a large bandwidth, that is, a large bandwidth can be described as a data rate exceeding the bandwidth expected by the user on the LTE radio interface.
  • the base station When the service data stream is occupied, the base station first allocates a bearer (transport carrier) for the base station and the terminal, and when the uplink and downlink transmission of the service data stream, the base station can perform wireless according to the wireless local area network access point and the cellular network.
  • the transmission quality of the link performs bit (bit) granularity segmentation on the service data stream, and the sliced service data stream is processed by the PDCP layer or the PDCP layer and the RLC layer, and encapsulated into a PDCP layer protocol packet or
  • the PDCP/RLC layer protocol packet is transmitted through the assigned bearer with a uniform sequence number, so that the WLAN can be fully utilized for flexible and efficient traffic. Converged transmission, allowing WLAN traffic to be borrowed
  • the channel of the cellular network (backhaul) to achieve high quality of service, and by using a uniform serial number for transmission, can effectively avoid the out of order of protocol packet transmission.
  • the general bandwidth (the general bandwidth is also a relative amount, which means that the service data stream can be carried only by the LTE radio interface even if the service data stream is not segmented)
  • the service data stream can be transmitted based on each service data.
  • the stream or bearer is split.
  • the base station is further configured to: adjust data transmission of the wireless local area network wireless interface and the cellular network wireless interface according to a wireless local area network wireless interface and a transmission quality of the cellular network wireless interface. proportion.
  • the service data flow transmitted through the wireless local area network wireless interface and the cellular network wireless interface needs to be dynamically balanced to avoid affecting the overall throughput improvement, and the base station can be based on the wireless local area network wireless interface and the cellular network wireless
  • the transmission quality of the interface adjusts its data stream transmission ratio to further fully WLAN for flexible and efficient traffic aggregation transmission.
  • the transmission quality includes: a packet loss rate and a transmission delay; and the WLAN access point is configured to report, to the base station, an average delay of the WLAN air interface, and the wireless a local area network access point and/or the base station is configured to insert a timestamp in the PDCP layer protocol packet or the PDCP/RLC layer protocol packet at a preset time interval, dynamically monitoring the WLAN access point and the The transmission delay between base stations.
  • the transmission quality of the wireless local area network wireless interface and the cellular network wireless interface includes, but is not limited to, a packet loss rate and a transmission delay, a packet loss rate, and a PDCP layer protocol packet or a PDCP/RLC layer protocol packet (packet) length.
  • the packet transmission frequency is related, and the transmission delay needs to consider the WLAN air interface delay and the delay of the data packet from the WLAN access point to the base station for forwarding.
  • the WLAN access point can report the average delay of the WLAN air interface to the base station.
  • the WLAN access point and/or the base station can dynamically insert the timestamp at a preset time interval in the PDCP layer protocol packet or the PDCP/RLC layer protocol packet to dynamically monitor the transmission delay between the WLAN access point and the base station.
  • the WLAN access point can be further effectively utilized for traffic sharing, thereby more flexibly adapting to the quality change of the wireless link.
  • the base station is configured to send the PDCP layer protocol packet or a PDCP/RLC layer protocol packet as a payload of the wireless local area network wireless interface to the wireless local area network access point
  • the WLAN access point is configured to use the PDCP layer protocol
  • the packet or PDCP/RLC layer protocol packet is sent to the terminal for PDCP layer or receiving side processing of the PDCP layer and the RLC layer to complete the transmission of the service data stream.
  • the base station processes the segmented downlink service data stream through the PDCP layer or the PDCP layer and the RLC layer, and then encapsulates it into a PDCP layer protocol packet or PDCP/RLC.
  • Layer protocol packet and send it as a payload of the wireless local area network (WLAN RAT) to the wireless local area network access point (AP), and then through the wireless local area network access point (AP) and terminal (
  • WLAN RAT wireless local area network
  • AP wireless local area network access point
  • the interface of the UE is transmitted to the terminal to perform processing on the PDCP layer or the PDCP layer and the receiving side of the RLC layer for the PDCP layer protocol packet or the PDCP/RLC layer protocol packet, and then handed over to the upper layer of the terminal.
  • the WLAN access point is further configured to: before the base station severes the service data stream, between the WLAN access point and the base station Establishing a logical interface for transmission of LTE protocol data of the data plane between the WLAN access point and the base station.
  • a logical interface is established between the WLAN access point and the base station before the base station severs the service data stream, and the LTE protocol data for the data plane is used in the WLAN access point.
  • the transmission between the base station and the base station may be wired or wireless.
  • the logical interface becomes the internal interface of the network element.
  • the control signaling can be hidden by the base station, and the scalability is also improved.
  • a further aspect of the present invention provides a system for transmitting a service data stream, comprising: a terminal and a wireless local area network access point, wherein when the terminal and the base station transmit a service data stream, the terminal determines whether it needs to pass The WLAN access point performs the transmission of the service data stream with the base station; when the determination result is YES, the terminal is configured to segment the service data stream to transmit the service data stream.
  • the terminal determines that the service data stream needs to be transmitted through the WLAN access point and directly (ie, through the cellular network, including LTE) and the base station
  • the data service flow is segmented to implement Wireless local area network (WLAN) aggregation at the access layer (AS layer), effectively utilizing WLAN access points for traffic sharing, thereby more flexibly adapting to the quality changes of the wireless link, and enabling wireless local area networks (WLAN) Traffic through the cellular network channel (backhaul) to achieve high quality of service.
  • WLAN Wireless local area network
  • AS layer access layer
  • the terminal is specifically configured to: allocate a bearer to the base station and the terminal; and perform processing on the transmit side of the PDCP layer or the PDCP layer and the RLC layer by using the split service data stream.
  • the packet of the service data stream is encapsulated into a PDCP layer protocol packet or a PDCP/RLC layer protocol packet, respectively, and the PDCP layer protocol packet or the PDCP/RLC layer protocol packet is passed through the bearer with a uniform sequence number. Transfer.
  • the base station is transparent to the traffic content of the terminal, when a large bandwidth is performed (the bandwidth generally refers to the bandwidth occupied by the signal, the large bandwidth is a relative amount, relative to the available rate of each wireless interface, such as A terminal's LTE radio interface can have 1 Mb/s bandwidth, so a 4 Mb/s bandwidth service traffic can be called a large bandwidth, that is, a large bandwidth can be described as a data rate exceeding the bandwidth expected by the user on the LTE radio interface.
  • the terminal When the service data stream is occupied, the terminal first allocates a bearer (transport carrier) for the base station and the terminal, and then according to the wireless local area network access point and the wireless chain of the cellular network when the service data stream is uplinked and downlinked.
  • a bearer transport carrier
  • the transmission quality of the path is bit-bit granularly segmented into the service data stream, and the segmented service data stream is processed by the PDCP layer or the PDCP layer and the RLC layer, and encapsulated into a PDCP layer protocol packet or PDCP.
  • /RLC layer protocol packet and transmitted through the assigned bearer with a uniform serial number, so that WLAN can be fully utilized for flexible and efficient traffic aggregation Transmission enables WLAN traffic to achieve high quality of service by means of the backhaul of the cellular network.
  • a uniform sequence number for transmission it is possible to effectively avoid the disorder of protocol packet transmission.
  • the service data stream can be transmitted based on each service data.
  • the flow or bearer is segmented, and on the terminal side, the traffic shaping of the per-bearer (by bearer) can be implemented by using a Traffic Flow Template (TFT), and the granularity of the base station can be divided into service data streams. It is consistent with the terminal side and may not be consistent.
  • TFT Traffic Flow Template
  • the terminal is further configured to: adjust data transmission of the wireless local area network wireless interface and the cellular network wireless interface according to a wireless local area network wireless interface and a transmission quality of the cellular network wireless interface. proportion.
  • transmission is performed through a wireless local area network wireless interface and a cellular network wireless interface.
  • the transmitted service data flow needs to be dynamically balanced to avoid affecting the overall throughput improvement.
  • the terminal can adjust the data stream transmission ratio according to the transmission quality of the wireless local area network wireless interface and the cellular network wireless interface, so as to further fully WLAN flexible. Efficient traffic aggregation transmission.
  • the transmission quality includes: a packet loss rate and a transmission delay; and the WLAN access point is configured to report, to the base station, an average delay of the WLAN air interface, and the wireless a local area network access point and/or the base station is configured to insert a timestamp in the PDCP layer protocol packet or the PDCP/RLC layer protocol packet at a preset time interval, dynamically monitoring the WLAN access point and the The transmission delay between base stations.
  • the transmission quality of the wireless local area network wireless interface and the cellular network wireless interface includes, but is not limited to, a packet loss rate and a transmission delay, a packet loss rate, and a PDCP layer protocol packet or a PDCP/RLC layer protocol packet (packet) length.
  • the packet transmission frequency is related, and the transmission delay needs to consider the WLAN air interface delay and the delay of the data packet from the WLAN access point to the base station for forwarding.
  • the WLAN access point can report the average delay of the WLAN air interface to the base station.
  • the WLAN access point and/or the base station can dynamically insert the timestamp at a preset time interval in the PDCP layer protocol packet or the PDCP/RLC layer protocol packet to dynamically monitor the transmission delay between the WLAN access point and the base station.
  • the WLAN access point can be further effectively utilized for traffic sharing, thereby more flexibly adapting to the quality change of the wireless link.
  • the terminal is configured to send the PDCP layer protocol packet or a PDCP/RLC layer protocol packet as a payload of the wireless local area network wireless interface to the wireless local area network access point
  • the WLAN access point is configured to send the PDCP layer protocol packet or the PDCP/RLC layer protocol packet to the base station to perform processing on the PDCP layer or the PDCP layer and the RLC layer, to complete the service data.
  • the transmission of the stream is configured to send the PDCP layer protocol packet or a PDCP/RLC layer protocol packet as a payload of the wireless local area network wireless interface to the wireless local area network access point
  • the WLAN access point is configured to send the PDCP layer protocol packet or the PDCP/RLC layer protocol packet to the base station to perform processing on the PDCP layer or the PDCP layer and the RLC layer, to complete the service data.
  • the transmission of the stream is configured to send the PDCP layer protocol packet or a PDCP/RLC layer protocol packet as a payload of the wireless local
  • the uplink service data stream is segmented in the terminal, and a part of the uplink service data stream is processed by the PDCP layer and/or the PDCP layer and the RLC layer, and then encapsulated into a PDCP layer protocol packet or PDCP.
  • /RLC layer protocol packet and send it as a payload of the wireless local area network (WLAN RAT) to the wireless local area network access point (AP), and then through the wireless local area network access point (AP)
  • the base station (eNB) interface is transmitted to the base station (eNB) to perform PDCP layer or PDCP layer and RLC layer receiving side processing on the PDCP layer protocol packet or the PDCP/RLC layer protocol packet.
  • the WLAN access point is further configured to: before the terminal severifies the service data stream, between the WLAN access point and the base station Establishing a logical interface for transmission of LTE protocol data of the data plane between the WLAN access point and the base station.
  • a logical interface between the WLAN access point and the base station is established before the terminal severifies the service data stream, and the LTE protocol data for the data plane is used in the WLAN access point and For transmission between base stations, the logical interface may be wired or wireless.
  • the logical interface becomes the internal interface of the network element.
  • wireless local area network aggregation in the access layer can be realized, and the wireless local area network access point can be effectively used for traffic sharing, thereby more flexibly adapting to the quality change of the wireless link, and enabling the wireless local area network.
  • Traffic is achieved by the channel of the cellular network to achieve high quality of service.
  • FIG. 1 is a schematic structural diagram of LTE and WLAN integration in the related art
  • FIG. 2 is a flow chart showing a method of transmitting a service data stream according to an embodiment of the present invention
  • FIG. 3 is a flow chart showing a method of transmitting a service data stream according to another embodiment of the present invention.
  • FIG. 4 is a schematic diagram showing a protocol layer of an AS layer implementing WLAN RAT integration according to an embodiment of the present invention
  • FIG. 5 is a schematic structural diagram of LTE and WLAN integration according to an embodiment of the present invention.
  • FIG. 6 is a schematic diagram showing the architecture of LTE and WLAN integration according to another embodiment of the present invention.
  • Figure 7 shows a block diagram of a system for transmitting a traffic data stream in accordance with one embodiment of the present invention
  • FIG. 8 shows a block diagram of a system for transmitting a traffic data stream in accordance with another embodiment of the present invention.
  • FIG. 2 shows a flow diagram of a method of transmitting a traffic data stream in accordance with one embodiment of the present invention.
  • a method for transmitting a service data stream includes: Step 202: When a base station and a terminal transmit a service data stream, the base station determines whether a wireless local area network access point is required. And transmitting, by the terminal, the service data flow; in step 204, when the determination result is yes, the base station performs segmentation on the service data flow to transmit the service data flow.
  • the base station determines that it is necessary to simultaneously transmit the service data stream through the WLAN access point and directly (ie, through the cellular network, including LTE)
  • the data service flow is segmented to implement Wireless local area network (WLAN) aggregation at the access layer (AS layer), effectively utilizing WLAN access points for traffic sharing, thereby more flexibly adapting to the quality changes of the wireless link, and enabling wireless local area networks (WLAN) Traffic is achieved by the backhaul of the cellular network to achieve high quality of service.
  • WLAN Wireless local area network
  • AS layer access layer
  • the base station performs segmentation on the service data flow to transmit the service data flow, and specifically includes: allocating a bearer to the base station and the terminal;
  • the service data stream is followed by a PDCP layer (Packet Data Convergence Protocol, one of the protocol layers of the 3GPP radio access side) or a PDCP layer and an RLC layer (Radio Link Control, Radio Link Control Protocol).
  • the transmitting side of the protocol layer of the 3GPP radio access side is processed to encapsulate the sliced service data stream into a PDCP layer protocol packet or a PDCP/RLC layer protocol packet respectively; and the PDCP layer protocol packet is Or PDCP/RLC layer protocol package to unify The serial number is transmitted through the bearer.
  • the bandwidth generally refers to the bandwidth occupied by the signal
  • the large bandwidth is a relative amount, relative to the available rate of each wireless interface, such as A terminal's LTE radio interface can have 1 Mb/s bandwidth, so a 4 Mb/s bandwidth service traffic can be called a large bandwidth, that is, a large bandwidth can be described as a data rate exceeding the bandwidth expected by the user on the LTE radio interface.
  • the base station When the service data stream is occupied, the base station first allocates a bearer (transport bearer) for the base station and the terminal, and when the uplink and downlink transmission of the service data stream, the base station can according to the wireless local area network access point and the cellular network
  • the transmission quality of the wireless link is bit-bit granularly segmented into the service data stream, and the segmented service data stream is processed by the PDCP layer or the PDCP layer and the RLC layer, and encapsulated into a PDCP layer protocol.
  • Packet or PDCP/RLC layer protocol packet and transmitted through the assigned bearer with a uniform sequence number, so that the WLAN can be fully utilized for flexibility and high efficiency. Traffic aggregation transmission enables WLAN traffic to achieve high quality of service through the backhaul of the cellular network. Moreover, by using a uniform sequence number for transmission, it is possible to effectively avoid the disorder of protocol packet transmission.
  • the general bandwidth (the general bandwidth is also a relative amount, which means that the service data stream can be carried only by the LTE radio interface even if the service data stream is not segmented)
  • the service data stream can be transmitted based on each service data.
  • the stream or bearer is split.
  • the base station adjusts a data stream transmission ratio of the wireless local area network wireless interface and the cellular network wireless interface according to a wireless local area network wireless interface and a transmission quality of the cellular network wireless interface.
  • the service data flow transmitted through the wireless local area network wireless interface and the cellular network wireless interface needs to be dynamically balanced to avoid affecting the overall throughput improvement, and the base station can be based on the wireless local area network wireless interface and the cellular network wireless
  • the transmission quality of the interface adjusts its data stream transmission ratio to further fully WLAN for flexible and efficient traffic aggregation transmission.
  • the transmission quality includes: a packet loss rate and a transmission delay; and the WLAN access point reports an average delay of the WLAN air interface to the base station, and the WLAN The access point and/or the base station inserts a timestamp in the PDCP layer protocol packet or the PDCP/RLC layer protocol packet at a preset time interval to dynamically monitor the wireless local area network access point and the base station The transmission delay.
  • the transmission quality of the wireless local area network wireless interface and the cellular network wireless interface includes, but is not limited to, a packet loss rate and a transmission delay, a packet loss rate, and a PDCP layer protocol packet or a PDCP/RLC layer protocol packet (packet) length.
  • the packet transmission frequency is related, and the transmission delay needs to consider the WLAN air interface delay and the delay of the data packet from the WLAN access point to the base station for forwarding.
  • the WLAN access point can report the average delay of the WLAN air interface to the base station.
  • the WLAN access point and/or the base station can dynamically insert the timestamp at a preset time interval in the PDCP layer protocol packet or the PDCP/RLC layer protocol packet to dynamically monitor the transmission delay between the WLAN access point and the base station.
  • the WLAN access point can be further effectively utilized for traffic sharing, thereby more flexibly adapting to the quality change of the wireless link.
  • the base station sends the PDCP layer protocol packet or a PDCP/RLC layer protocol packet as a payload of the wireless local area network wireless interface to the wireless local area network access point
  • the WLAN access point sends the PDCP layer protocol packet or the PDCP/RLC layer protocol packet to the terminal for processing on the PDCP layer or the PDCP layer and the RLC layer to complete the transmission of the service data stream.
  • the base station processes the segmented downlink service data stream through the PDCP layer or the PDCP layer and the RLC layer, and then encapsulates it into a PDCP layer protocol packet or PDCP/RLC.
  • Layer protocol packet and send it as a payload of the wireless local area network (WLAN RAT) to the wireless local area network access point (AP), and then through the wireless local area network access point (AP) and terminal (
  • WLAN RAT wireless local area network
  • AP wireless local area network access point
  • the interface of the UE is transmitted to the terminal to perform processing on the PDCP layer or the PDCP layer and the receiving side of the RLC layer for the PDCP layer protocol packet or the PDCP/RLC layer protocol packet, and then handed over to the upper layer of the terminal.
  • a schematic diagram of a protocol layer for implementing WLAN RAT integration according to an AS layer according to an embodiment of the present invention includes a terminal and a network side, the protocol layer will be a non-cellular network protocol across a RAT (wireless interface), in layer 2 Realizing interworking with the cellular network protocol stack, and reflecting the inter-layer primitives that the solution of the present invention needs to implement, that is, the SAP between the RLC layer and the WLAN LLC layer (Logical Link Control) (Service Access point, definition of service access point).
  • the SAP between the RLC layer and the WLAN LLC layer (Logical Link Control) (Service Access point, definition of service access point).
  • the method further includes: establishing a logical interface between the WLAN access point and the base station, for using data Transmission of LTE protocol data between the WLAN access point and the base station.
  • a logical interface is established between the WLAN access point and the base station before the base station severs the service data stream, and the LTE protocol data for the data plane is used in the WLAN access point and the base station.
  • the logical interface can be wired or wireless, so that there is no direct logical interface between the WLAN access point and the core network, when the base station and the WLAN access point are co-located
  • the logical interface becomes the internal interface of the network element.
  • the control signaling can be hidden by the base station, and the scalability is also improved.
  • An architecture scheme of LTE and WLAN integration according to an embodiment of the present invention is shown in FIG. 5.
  • the technical solution of the present invention is also applicable to another architecture scheme of LTE and WLAN integration as shown in FIG. 6.
  • FIG. 3 shows a flow diagram of a method of transmitting a traffic data stream in accordance with another embodiment of the present invention.
  • a method for transmitting a service data stream includes: Step 302: When a terminal and a base station transmit a service data stream, the terminal determines whether it needs to access through a wireless local area network. And transmitting, by the base station, the service data stream; in step 304, when the determination result is yes, the terminal performs segmentation on the service data stream to transmit the service data stream.
  • the terminal determines that the service data stream needs to be transmitted through the WLAN access point and directly (ie, through the cellular network, including LTE) and the base station
  • the data service flow is segmented to implement Wireless local area network (WLAN) aggregation at the access layer (AS layer), effectively utilizing WLAN access points for traffic sharing, thereby more flexibly adapting to the quality changes of the wireless link, and enabling wireless local area networks (WLAN) Traffic is achieved by the backhaul of the cellular network to achieve high quality of service.
  • WLAN Wireless local area network
  • AS layer access layer
  • the terminal is configured to perform the segmentation of the service data flow to transmit the service data flow, and specifically includes: allocating a bearer to the base station and the terminal;
  • the service data stream is followed by a PDCP layer (Packet Data Convergence Protocol, one of the protocol layers of the 3GPP radio access side) or a PDCP layer and an RLC layer (Radio Link Control, Radio Link Control Protocol).
  • the transmitting side of the protocol layer of the 3GPP radio access side is processed to encapsulate the sliced service data stream into a PDCP layer protocol packet or a PDCP/RLC layer protocol packet respectively; and the PDCP layer protocol packet is Or the PDCP/RLC layer protocol packet is transmitted through the bearer with a uniform sequence number.
  • the base station is transparent to the traffic content of the terminal, when a large bandwidth is performed (the bandwidth generally refers to the bandwidth occupied by the signal, the large bandwidth is a relative amount, relative to the available rate of each wireless interface, such as A terminal's LTE radio interface can have 1 Mb/s bandwidth, so a 4 Mb/s bandwidth service traffic can be called a large bandwidth, that is, a large bandwidth can be described as a data rate exceeding the bandwidth expected by the user on the LTE radio interface.
  • the terminal When the service data stream is occupied, the terminal first allocates a bearer (transport carrier) for the base station and the terminal, and then according to the wireless local area network access point and the wireless chain of the cellular network when the service data stream is uplinked and downlinked.
  • a bearer transport carrier
  • the transmission quality of the path is bit-bit granularly segmented into the service data stream, and the segmented service data stream is processed by the PDCP layer or the PDCP layer and the RLC layer, and encapsulated into a PDCP layer protocol packet or PDCP.
  • /RLC layer protocol packet and transmitted through the assigned bearer with a uniform serial number, so that WLAN can be fully utilized for flexible and efficient traffic aggregation Transmission enables WLAN traffic to achieve high quality of service by means of the backhaul of the cellular network.
  • a uniform sequence number for transmission it is possible to effectively avoid the disorder of protocol packet transmission.
  • the service data stream can be transmitted based on each service data.
  • the flow or bearer is segmented, and on the terminal side, the traffic shaping of the per-bearer (by bearer) can be implemented by using a Traffic Flow Template (TFT), and the granularity of the base station can be divided into service data streams. It is consistent with the terminal side and may not be consistent.
  • TFT Traffic Flow Template
  • the terminal adjusts a data stream transmission ratio of the wireless local area network wireless interface and the cellular network wireless interface according to a wireless local area network wireless interface and a transmission quality of the cellular network wireless interface.
  • the service data stream transmitted through the wireless local area network wireless interface and the cellular network wireless interface needs to be dynamically balanced to avoid affecting the overall throughput improvement, and the terminal can be wireless according to the wireless local area network wireless network and the cellular network.
  • the transmission quality of the interface adjusts its data stream transmission ratio to further fully WLAN for flexible and efficient traffic aggregation transmission.
  • the transmission quality includes: a packet loss rate and a transmission delay; and the WLAN access point reports an average delay of the WLAN air interface to the base station, and the WLAN The access point and/or the base station at the PDCP layer at preset time intervals A timestamp is inserted into the protocol packet or PDCP/RLC layer protocol packet to dynamically monitor the transmission delay between the WLAN access point and the base station.
  • the transmission quality of the wireless local area network wireless interface and the cellular network wireless interface includes, but is not limited to, a packet loss rate and a transmission delay, a packet loss rate, and a PDCP layer protocol packet or a PDCP/RLC layer protocol packet (packet) length.
  • the packet transmission frequency is related, and the transmission delay needs to consider the WLAN air interface delay and the delay of the data packet from the WLAN access point to the base station for forwarding.
  • the WLAN access point can report the average delay of the WLAN air interface to the base station.
  • the WLAN access point and/or the base station can dynamically insert the timestamp at a preset time interval in the PDCP layer protocol packet or the PDCP/RLC layer protocol packet to dynamically monitor the transmission delay between the WLAN access point and the base station.
  • the WLAN access point can be further effectively utilized for traffic sharing, thereby more flexibly adapting to the quality change of the wireless link.
  • the terminal sends the PDCP layer protocol packet or the PDCP/RLC layer protocol packet as a payload of the wireless local area network wireless interface to the wireless local area network access point, and
  • the WLAN access point sends the PDCP layer protocol packet or the PDCP/RLC layer protocol packet to the base station for processing on the PDCP layer or the PDCP layer and the RLC layer to complete the transmission of the service data stream.
  • the uplink service data stream is segmented in the terminal, and a part of the uplink service data stream is processed by the PDCP layer and/or the PDCP layer and the RLC layer, and then encapsulated into a PDCP layer protocol packet or PDCP.
  • /RLC layer protocol packet and send it as a payload of the wireless local area network (WLAN RAT) to the wireless local area network access point (AP), and then through the wireless local area network access point (AP)
  • the base station (eNB) interface is transmitted to the base station (eNB) to perform PDCP layer or PDCP layer and RLC layer receiving side processing on the PDCP layer protocol packet or the PDCP/RLC layer protocol packet.
  • a schematic diagram of a protocol layer for implementing WLAN RAT integration according to an AS layer according to an embodiment of the present invention includes a terminal and a network side, the protocol layer will be a non-cellular network protocol across a RAT (wireless interface), in layer 2 Realizing interworking with the cellular network protocol stack, and reflecting the inter-layer primitives that the solution of the present invention needs to implement, that is, the SAP between the RLC layer and the WLAN LLC layer (Logical Link Control) (Service Access point, definition of service access point).
  • the SAP between the RLC layer and the WLAN LLC layer (Logical Link Control) (Service Access point, definition of service access point).
  • the method further includes: establishing a logical interface between the WLAN access point and the base station, for using a data plane Transmission of LTE protocol data between the WLAN access point and the base station.
  • the WLAN access point before the terminal divides the service data stream, the WLAN access point establishes a logical interface with the base station, and the LTE protocol data for the data plane is used in the WLAN access point.
  • the transmission between the base station and the base station may be wired or wireless.
  • the logical interface becomes the internal interface of the network element.
  • the control signaling can be hidden by the base station, and the scalability is also improved.
  • An architecture scheme of LTE and WLAN integration according to an embodiment of the present invention is shown in FIG. 5.
  • the technical solution of the present invention is also applicable to another architecture scheme of LTE and WLAN integration as shown in FIG. 6.
  • Figure 7 shows a block diagram of a system for transmitting traffic data streams in accordance with one embodiment of the present invention.
  • a system 700 for transmitting a service data stream includes: a base station 702 and a WLAN access point 704, wherein the base station 702 and the terminal transmit a service data stream
  • the base station 702 determines whether the transmission of the service data stream needs to be performed with the terminal through the WLAN access point 704. When the determination result is yes, the base station 702 is configured to cut the service data stream. Points to transmit the traffic data stream.
  • the base station 702 determines that it is necessary to simultaneously transmit the service data stream through the WLAN access point 704 and directly (ie, through the cellular network, including LTE), the data service flow is segmented.
  • the WLAN access point 606 is effectively utilized for traffic sharing, thereby more flexibly adapting to quality changes of the wireless link, and enabling wireless local area networks.
  • Network (WLAN) traffic achieves high quality of service through the backhaul of the cellular network.
  • the base station 702 is specifically configured to: allocate a bearer for the base station 702 and the terminal; and send the sliced service data stream to a PDCP layer or a PDCP layer and an RLC layer.
  • the side processing is performed to encapsulate the segmented service data stream into a PDCP layer protocol packet or a PDCP/RLC layer protocol packet respectively; and the PDCP layer protocol packet or the PDCP/RLC layer protocol packet is passed through a unified serial number.
  • the bearer is transmitted.
  • the base station 702 is transparent to the traffic content of the terminal, when a large bandwidth is performed (the bandwidth generally refers to the bandwidth occupied by the signal, the large bandwidth is a relative amount, relative to the available rate of each wireless interface,
  • a terminal's LTE radio interface can have 1 Mb/s bandwidth, so a 4 Mb/s bandwidth service traffic can be called a large bandwidth, that is, a large bandwidth can be described as a data rate exceeding that expected by users on the LTE radio interface.
  • the base station 702 When the bandwidth of the service data stream is transmitted, the base station 702 first allocates a bearer (transport carrier) for the base station 702 and the terminal, and when the uplink and downlink transmission of the service data stream, the base station 702 can access the point 704 according to the WLAN.
  • a bearer transport carrier
  • the transmission quality of the wireless link of the cellular network is bit-bit granularly segmented into the service data stream, and the sliced service data stream is processed by the PDCP layer or the PDCP layer and the RLC layer, and encapsulated as The PDCP layer protocol packet or the PDCP/RLC layer protocol packet is transmitted through the allocated bearer with a uniform sequence number, so that the WLAN can be fully utilized for flexibility and high Efficient traffic aggregation transmission enables WLAN traffic to achieve high quality of service through the backhaul of the cellular network. Moreover, by using a uniform sequence number for transmission, it is possible to effectively avoid the disorder of protocol packet transmission.
  • the general bandwidth (the general bandwidth is also a relative amount, which means that the service data stream can be carried only by the LTE radio interface even if the service data stream is not segmented)
  • the service data stream can be transmitted based on each service data.
  • the stream or bearer is split.
  • the base station 702 is further configured to: adjust a data flow of the wireless local area network wireless interface and the cellular network wireless interface according to a wireless local area network wireless interface and a transmission quality of a cellular network wireless interface. Transmission ratio.
  • the service data stream transmitted through the wireless local area network wireless interface and the cellular network wireless interface needs to be dynamically balanced to avoid affecting the overall throughput improvement, and the base station 702 can be based on the wireless local area network wireless interface and the cellular network.
  • the transmission quality of the wireless interface adjusts its data stream transmission ratio to further fully WLAN for flexible and efficient traffic aggregation transmission.
  • the transmission quality includes: a packet loss rate and a transmission delay; and the WLAN access point 704 is configured to report the average delay of the WLAN air interface to the base station 702, and The WLAN access point 704 and/or the base station 702 are configured to insert a timestamp in the PDCP layer protocol packet or the PDCP/RLC layer protocol packet at a preset time interval to dynamically monitor the WLAN access
  • the transmission quality of the wireless local area network wireless interface and the cellular network wireless interface includes, but is not limited to, a packet loss rate and a transmission delay, a packet loss rate, and a PDCP layer protocol packet or a PDCP/RLC layer protocol packet (packet) length.
  • the packet transmission frequency is related, and the transmission delay needs to consider the WLAN air interface delay and the delay of the data packet from the WLAN access point to the base station for forwarding.
  • the WLAN access point 704 can report the average of the WLAN air interface to the base station 702.
  • the WLAN access point 704 and/or the base station 702 can dynamically monitor the WLAN access point 704 and the base station by inserting a timestamp at a preset time interval in the PDCP layer protocol packet or the PDCP/RLC layer protocol packet.
  • the transmission delay between 702, in this way, can further effectively utilize the WLAN access point 704 for traffic sharing, thereby more flexibly adapting to the quality change of the wireless link.
  • the base station 702 is configured to send the PDCP layer protocol packet or a PDCP/RLC layer protocol packet as a payload of the wireless local area network wireless interface to the wireless local area network access point.
  • the WLAN access point 704 is configured to send the PDCP layer protocol packet or a PDCP/RLC layer protocol packet to the terminal for PDCP layer or PDCP layer and RLC layer receiving side processing, to complete The transmission of the business data stream.
  • the base station 702 processes the segmented downlink service data stream through the PDCP layer or the PDCP layer and the RLC layer, and then encapsulates it into a PDCP layer protocol packet or PDCP/
  • the RLC layer protocol packet is sent to the WLAN access point 704 (AP) as a payload of the WLAN radio interface (WLAN RAT) and then through the WLAN access point 704 (AP)
  • the interface with the terminal (UE) is transmitted to the terminal to perform processing on the PDCP layer or the PDCP layer and the receiving side of the RLC layer for the PDCP layer protocol packet or the PDCP/RLC layer protocol packet, and then handed over to the upper layer of the terminal.
  • the WLAN access point 704 is further configured to: before the base station 702 segments the service data stream, the WLAN access point 704 and the A logical interface is established between the base stations 702 for transmission of LTE protocol data of the data plane between the WLAN access point 704 and the base station 702.
  • a logical interface is established between the WLAN access point 704 and the base station 702 before the base station 702 segments the service data stream, so that the LTE protocol data for the data plane is accessed in the WLAN.
  • the transmission between the point 704 and the base station 702, the logical interface may be wired or wireless, such that there is no direct connection between the WLAN access point 704 and the core network.
  • the logical interface when the base station 702 and the WLAN access point 704 are co-located, the logical interface becomes an internal interface of the network element, and during the switching process of the service data flow, the control signaling can be hidden by the base station. It also increases scalability.
  • FIG. 8 shows a block diagram of a system for transmitting a traffic data stream in accordance with another embodiment of the present invention.
  • a system 800 for transmitting a service data stream includes: a terminal 802 and a wireless local area network access point 804, wherein the terminal 802 transmits a service data stream with a base station.
  • the terminal 802 determines whether the transmission of the service data stream needs to be performed by the WLAN access point 804 and the base station; when the determination result is yes, the terminal 802 is configured to perform the service data flow. Segmentation to transmit the traffic data stream.
  • the terminal 802 determines that it is necessary to simultaneously transmit the service data stream through the WLAN access point 804 and directly (ie, through the cellular network, including LTE), the data service flow is segmented.
  • WLAN wireless local area network
  • AS layer access layer
  • WLAN access points for traffic sharing, thereby more flexibly adapting to quality changes of wireless links, and enabling wireless local area networks (WLAN) traffic achieves high quality of service by the backhaul of the cellular network.
  • the terminal 802 is specifically configured to: allocate a bearer for the base station and the terminal 802; and perform the sending of the split service data stream to a PDCP layer or a PDCP layer and an RLC layer.
  • the side processing is performed to encapsulate the segmented service data stream into a PDCP layer protocol packet or a PDCP/RLC layer protocol packet respectively; and the PDCP layer protocol packet or the PDCP/RLC layer protocol packet is passed through a unified serial number.
  • the bearer is transmitted.
  • the base station is transparent to the traffic content of the terminal 802
  • the bandwidth generally refers to the bandwidth occupied by the signal
  • the large bandwidth is a relative amount, relative to the available rate of each wireless interface
  • a terminal's LTE radio interface can have 1 Mb/s bandwidth, so a 4 Mb/s bandwidth service traffic can be called a large bandwidth, that is, a large bandwidth can be described as a data rate exceeding that expected by users on the LTE radio interface.
  • the terminal 802 first allocates a bearer (transport bearer) for the base station and the terminal 802, and the terminal 802 can access according to the WLAN during uplink and downlink transmission of the service data stream.
  • a bearer transport bearer
  • Point 804 and the transmission quality of the radio link of the cellular network perform bit (bit) granularity segmentation on the service data stream, and process the segmented service data stream to the transmitting side of the PDCP layer or the PDCP layer and the RLC layer, and Seal Installed as a PDCP layer protocol packet or a PDCP/RLC layer protocol packet, and transmitted through a distributed bearer with a uniform sequence number.
  • bit bit
  • the WLAN can be fully utilized for flexible and efficient traffic aggregation transmission, so that WLAN traffic is transmitted through the cellular network.
  • the channel (backhaul) to achieve high quality of service, and by using a uniform serial number for transmission, can effectively avoid the out of order of protocol packet transmission.
  • the service data stream can be transmitted based on each service data.
  • the flow or bearer is sharded, and on the terminal 802 side, the traffic shaping of the per-bearer (by bearer) can be implemented by using a Traffic Flow Template (TFT), and the base station can split the achievable granularity of the service data flow. It can be consistent with the terminal side or it can be inconsistent.
  • TFT Traffic Flow Template
  • the terminal 802 is further configured to: adjust a data flow of the wireless local area network wireless interface and the cellular network wireless interface according to a wireless local area network wireless interface and a transmission quality of the cellular network wireless interface. Transmission ratio.
  • the service data stream transmitted through the wireless local area network wireless interface and the cellular network wireless interface needs to be dynamically balanced to avoid affecting the overall throughput improvement, and the terminal 802 can be based on the wireless local area network wireless interface and the cellular network.
  • the transmission quality of the wireless interface adjusts its data stream transmission ratio to further fully WLAN for flexible and efficient traffic aggregation transmission.
  • the transmission quality includes: a packet loss rate and a transmission delay; and the WLAN access point 804 is configured to report, to the base station, an average delay of the WLAN air interface, and the The WLAN access point 804 and/or the base station is configured to insert a timestamp in the PDCP layer protocol packet or the PDCP/RLC layer protocol packet at a preset time interval to dynamically monitor the WLAN access point 804.
  • the transmission delay between the base station and the base station.
  • the transmission quality of the wireless local area network wireless interface and the cellular network wireless interface includes, but is not limited to, a packet loss rate and a transmission delay, a packet loss rate, and a PDCP layer protocol packet or a PDCP/RLC layer protocol packet (packet) length.
  • the packet transmission frequency is related, and the transmission delay needs to consider the WLAN air interface delay and the delay of the data packet from the WLAN access point 804 to the base station for forwarding.
  • the WLAN access point 804 can report the average of the WLAN air interface to the base station.
  • the WLAN access point 804 and/or the base station may be in the PDCP layer protocol packet or the PDCP/RLC layer protocol A time stamp is inserted in the packet at a preset time interval to dynamically monitor the transmission delay between the WLAN access point 804 and the base station.
  • the WLAN access point 804 can be further effectively utilized for traffic sharing, thereby providing more flexibility. Adapt to the quality changes of the wireless link.
  • the terminal 802 is configured to send the PDCP layer protocol packet or a PDCP/RLC layer protocol packet as a payload of the wireless local area network wireless interface to the wireless local area network access point.
  • the WLAN access point 804 is configured to send the PDCP layer protocol packet or a PDCP/RLC layer protocol packet to the base station to perform PDCP layer or PDCP layer and RLC layer receiving side processing, to complete The transmission of the business data stream.
  • the uplink service data stream is segmented at the terminal 802, and a part of the uplink service data stream is processed by the PDCP layer and/or the PDCP layer and the RLC layer, and then encapsulated into a PDCP layer protocol packet or
  • the PDCP/RLC layer protocol packet is sent to the WLAN access point 804 (AP) as a payload of the WLAN radio interface (WLAN RAT) and then through the WLAN access point 804 (AP) and the base station (eNB) interface are transmitted to the base station (eNB) to perform PDCP layer or PDCP layer and RLC layer receiving side processing on the PDCP layer protocol packet or the PDCP/RLC layer protocol packet.
  • the WLAN access point 804 is further configured to: before the terminal 802 segments the service data stream, establish the WLAN access point 804 and the location A logical interface between the base stations is used for transmission of LTE protocol data for the data plane between the WLAN access point 804 and the base station.
  • a WAN protocol is established between the WLAN access point 804 and the base station before the terminal 802 segments the service data stream, and the LTE protocol data for the data plane is used at the WLAN access point.
  • the transmission between the 804 and the base station, the logical interface may be wired or wireless, such that there is no direct logical interface between the WLAN access point 804 and the core network, and then the base station and the WLAN access When the 804 is co-located, the logical interface becomes an internal interface of the network element.
  • the control signaling can be hidden by the base station, and the scalability is also improved.
  • the technical solution of the present invention is described in detail above with reference to the accompanying drawings.
  • the WLAN in the access layer can be aggregated, and the WLAN access point can be effectively used for traffic sharing, thereby more flexibly adapting to the quality change of the wireless link. And a message that enables WLAN traffic to pass through the cellular network The road to achieve high quality of service.

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Abstract

本发明提出了一种传输业务数据流的方法和一种传输业务数据流的系统，所述方法包括：基站在与终端进行业务数据流的传输时，基站确定是否需要通过无线局域网络接入点与所述终端进行所述业务数据流的传输；在确定结果为是时，所述基站对所述业务数据流进行切分，以传输所述业务数据流。通过本发明的技术方案，可以实现在接入层的无线局域网络聚合，有效地利用无线局域网络接入点进行流量分担，进而更加灵活地适应无线链路的质量变化，以及能够使得无线局域网络流量借由蜂窝网络的信道来实现高的服务质量。

Description

传输业务数据流的方法和系统
本申请要求于2015年04月10日提交中国专利局，申请号为201510169646.7、发明名称为“传输业务数据流的方法和系统”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及通信技术领域，具体而言，涉及一种传输业务数据流的方法和一种传输业务数据流的系统。
背景技术
目前，随着各种移动应用的发展以及移动终端用户的不断增加，现有无线通信系统如4G LTE(the 4th generation mobile communication technology Long Term Evolution，第四代移动通信技术的长期演进)、LTE-A(Long Term Evolution-Advanced，长期演进技术升级版)系统无法满足用户对高速无线接入的带宽需求。与此同时，在提高接入带宽的同时，如何降低成本也是一个非常重要的因素。利用WLAN(Wireless Local Area Network，无线局域网络)的低成本优势来弥补LTE及其增强技术LTE-A在带宽上的不足，成为一个非常有前景的方向。
现有的WLAN与Cellular(蜂窝)网络的整合技术主要在3GPP(3rd Generation Partnership Project，第三代合作伙伴计划)进行定义。3GPP现有方案分两种：一种是在核心网的整合(参考TS 23.402)，一种是在RAN(Residential Access Network，居民接入网)层面进行整合(参考TS 23.401，TS 36.304，TS 36.331)。在RAN层面的整合是3GPP Release 12定义的RAN辅助的WLAN互通方案。不论是核心网整合方案还是RAN辅助的WLAN互通方案，都不支持在AS层(Access Stratum，接入层)对用户面数据进行聚合。因此，尚且不能充分利用WLAN进行灵活和高效率的流量汇聚传输。如图1所示，为现有的LTE与WLAN整合的架构示意图。
具体来说，在核心网整合方案和RAN辅助的WLAN互通方案下，由 WLAN辅小区的传输的用户流量都不是作为终端与接入网网元eNB之间的无线接入承载的一部分，导致了以下的缺陷和问题：
(1)无法利用蜂窝网络高服务质量的backhaul(信道)来支持业务数据传输。
(2)当蜂窝网络或者WLAN的无线链路质量发生变化时，业务流在RAT(Radio Access Type，无线接口)间的切转所导致的信令开销大，这主要是由于所建立的无线承载是核心网可见的，因此，在业务流切转过程当中，控制信令需要被核心网实体来控制，无法被基站隐藏。
(3)扩展性差，随着WLAN AP(Wireless Local Area Networks Access Point，无线访问接入点)数量的增加，WLAN AP到核心网的逻辑连接会随着增加，这给蜂窝网络带来了很大的挑战。
因此，如何实现在AS层的WLAN聚合，以有效地利用WLAN AP来进行流量分担，并提高WLAN整合的可扩展性，进而更加灵活地适应无线链路的质量变化，以及能够使得WLAN流量借由蜂窝网络的backhaul来实现高的服务质量成为目前亟待解决的技术问题。
发明内容
本发明正是基于上述问题，提出了一种新的技术方案，可以实现在接入层的无线局域网络聚合，有效地利用无线局域网络接入点进行流量分担，进而更加灵活地适应无线链路的质量变化，以及能够使得无线局域网络流量借由蜂窝网络的信道来实现高的服务质量。
有鉴于此，本发明的一方面提出了一种传输业务数据流的方法，包括：基站与终端进行业务数据流的传输时，所述基站确定是否需要通过无线局域网络接入点与所述终端进行所述业务数据流的传输；在确定结果为是时，所述基站对所述业务数据流进行切分，以传输所述业务数据流。
在该技术方案中，在基站确定需要同时通过无线局域网络接入点以及直接(即通过蜂窝网络，包括LTE)与终端进行业务数据流的传输时，对该数据业务流进行切分，以实现在接入层(AS层)的无线局域网络(WLAN)聚合，有效地利用无线局域网络接入点进行流量分担，进而更加灵活地适应无线链路 的质量变化，以及能够使得无线局域网络(WLAN)流量借由蜂窝网络的信道(backhaul)来实现高的服务质量。
在上述技术方案中，优选地，所述基站对所述业务数据流进行切分，以传输所述业务数据流，具体包括：为所述基站和所述终端分配承载；所述基站将切分后的所述业务数据流进行PDCP层(Packet data convergence Protocol，分组数据聚合层协议，3GPP无线接入侧的协议层之一)或PDCP层和RLC层(Radio Link control，无线链路控制层协议，3GPP无线接入侧的协议层之一)的发送侧处理，以将切分后的所述业务数据流分别封装为PDCP层协议包或PDCP/RLC层协议包；将所述PDCP层协议包或PDCP/RLC层协议包以统一的序列号通过所述承载进行传输。
在该技术方案中，由于基站对终端的流量内容是透明的，当进行大带宽(带宽通常指信号所占据的频带宽度，大带宽是一个相对量，相对于每个无线接口的可用速率，比如，一个终端的LTE无线接口上可以有1Mb/s的带宽，那么一个4Mb/s带宽的业务流量就可以称为大带宽，即大带宽可以描述为数据速率超过了LTE无线接口上用户期待的带宽占用)的业务数据流的传输时，基站首先为基站和终端分配一个承载(传输载体)，则在业务数据流的上行和下行传输时，基站可以根据无线局域网络接入点和蜂窝网络的无线链路的传输质量对业务数据流进行bit(比特)粒度切分，并将切分后的业务数据流进行PDCP层或PDCP层和RLC层的发送侧处理，将其封装为PDCP层协议包或PDCP/RLC层协议包，并以统一的序列号通过分配的承载进行传输，如此，可以充分利用WLAN进行灵活和高效率的流量汇聚传输，使得WLAN流量借由蜂窝网络的信道(backhaul)来实现高的服务质量，而且，通过采用统一的序列号进行传输，可以有效地避免协议数据包传输发生乱序的情况。
在上述技术方案中，当进行一般带宽(一般带宽也是一个相对量，指即使不对业务数据流进行切分，仅用LTE无线接口也可以承载)业务数据流的传输时，可以基于每个业务数据流或者承载进行切分。
在上述技术方案中，优选地，所述基站根据无线局域网络无线接口和蜂窝网络无线接口的传输质量，调整所述无线局域网络无线接口和所述蜂窝网络无线接口的数据流传输比例。
在该技术方案中，通过无线局域网络无线接口和蜂窝网络无线接口进行传输的业务数据流需要实现动态的平衡，以避免影响总体吞吐量的提升，基站可以根据无线局域网络无线接口和蜂窝网络无线接口的传输质量调整其数据流传输比例，以进一步充分WLAN进行灵活和高效率的流量汇聚传输。
在上述技术方案中，优选地，所述传输质量包括：丢包率和传输延迟；以及所述无线局域网络接入点向所述基站汇报无线局域网络空口的平均延迟，以及所述无线局域网络接入点和/或所述基站按预设时间间隔在所述PDCP层协议包或PDCP/RLC层协议包中插入时间戳，以动态监测所述无线局域网络接入点和所述基站之间的所述传输延迟。
在该技术方案中，无线局域网络无线接口和蜂窝网络无线接口的传输质量包括但不限于丢包率和传输延迟，丢包率与PDCP层协议包或PDCP/RLC层协议包(数据包)长度以及包发送频率有关，而传输延迟需要考虑WLAN空口延迟和数据包从无线局域网络接入点到基站进行中转的延迟，具体地，无线局域网络接入点可以向基站汇报WLAN空口的平均延迟，同时，无线局域网络接入点和/或基站可以在PDCP层协议包或PDCP/RLC层协议包中以预设时间间隔插入时间戳来动态监测无线局域网络接入点和基站之间的传输延迟，如此，可以进一步有效地利用无线局域网络接入点进行流量分担，进而更加灵活地适应无线链路的质量变化。
在上述技术方案中，优选地，所述基站将所述PDCP层协议包或PDCP/RLC层协议包作为所述无线局域网络无线接口的有效负载发送到所述无线局域网络接入点，以及所述无线局域网络接入点将所述PDCP层协议包或PDCP/RLC层协议包发送到所述终端进行PDCP层或PDCP层和RLC层的接收侧处理，以完成所述业务数据流的传输。
在该技术方案中，在下行传输方向，基站(eNB)将切分后的一部分下行业务数据流经过PDCP层/或PDCP层和RLC层的发送侧处理后封装为PDCP层协议包或PDCP/RLC层协议包，并将其作为无线局域网络无线接口(WLAN RAT)的有效负载(payload)，发送到无线局域网络接入点(AP)，然后通过无线局域网络接入点(AP)与终端(UE)的接口传输给终端，以对PDCP层协议包或PDCP/RLC层协议包进行PDCP层或PDCP层和RLC层的接收侧的 处理，然后交给终端的高层。
在上述技术方案中，优选地，在所述基站对所述业务数据流进行切分之前，还包括：所述无线局域网络接入点与所述基站之间建立逻辑接口，以用于数据面的LTE协议数据在所述无线局域网络接入点与所述基站之间的传输。
在该技术方案中，通过在基站对业务数据流进行切分之前，无线局域网络接入点与基站之间建立逻辑接口，以用于数据面的LTE协议数据在无线局域网络接入点与基站之间的传输，该逻辑接口可以是有线的也可以是无线的，如此，无线局域网络接入点与核心网之间没有直接的逻辑接口，则当基站和无线局域网络接入点共址时，该逻辑接口即成为网元内部的接口，在业务数据流的切转过程当中，控制信令则可以被基站所隐藏，同时也提高了扩展性。
本发明的另一方面提出了一种传输业务数据流的方法，包括：终端与基站进行业务数据流的传输时，所述终端确定是否需要通过无线局域网络接入点与所述基站进行所述业务数据流的传输；在确定结果为是时，所述终端对所述业务数据流进行切分，以传输所述业务数据流。
在该技术方案中，在终端确定需要同时通过无线局域网络接入点以及直接(即通过蜂窝网络，包括LTE)与基站进行业务数据流的传输时，对该数据业务流进行切分，以实现在接入层(AS层)的无线局域网络(WLAN)聚合，有效地利用无线局域网络接入点进行流量分担，进而更加灵活地适应无线链路的质量变化，以及能够使得无线局域网络(WLAN)流量借由蜂窝网络的信道(backhaul)来实现高的服务质量。
在上述技术方案中，优选地，所述终端对所述业务数据流进行切分，以传输所述业务数据流，具体包括：为所述基站和所述终端分配承载；所述终端将切分后的所述业务数据流进行PDCP层(Packet data convergence Protocol，分组数据聚合层协议，3GPP无线接入侧的协议层之一)或PDCP层和RLC层(Radio Link control，无线链路控制层协议，3GPP无线接入侧的协议层之一)的发送侧处理，以将切分后的所述业务数据流分别封装为PDCP层协议包或PDCP/RLC层协议包；将所述PDCP层协议包或PDCP/RLC层协议包以统一的序列号通过所述承载进行传输。
在该技术方案中，由于基站对终端的流量内容是透明的，当进行大带宽(带 宽通常指信号所占据的频带宽度，大带宽是一个相对量，相对于每个无线接口的可用速率，比如，一个终端的LTE无线接口上可以有1Mb/s的带宽，那么一个4Mb/s带宽的业务流量就可以称为大带宽，即大带宽可以描述为数据速率超过了LTE无线接口上用户期待的带宽占用)的业务数据流的传输时，终端首先为基站和终端分配一个承载(传输载体)，则在业务数据流的上行和下行传输时，终端可以根据无线局域网络接入点和蜂窝网络的无线链路的传输质量对业务数据流进行bit(比特)粒度切分，并将切分后的业务数据流进行PDCP层或PDCP层和RLC层的发送侧处理，将其封装为PDCP层协议包或PDCP/RLC层协议包，并以统一的序列号通过分配的承载进行传输，如此，可以充分利用WLAN进行灵活和高效率的流量汇聚传输，使得WLAN流量借由蜂窝网络的信道(backhaul)来实现高的服务质量，而且，通过采用统一的序列号进行传输，可以有效地避免协议数据包传输发生乱序的情况。
在上述技术方案中，当进行一般带宽(一般带宽也是一个相对量，指即使不对业务数据流进行切分，仅用LTE无线接口也可以承载)业务数据流的传输时，可以基于每个业务数据流或者承载进行切分，以及在终端侧，可以利用TFT(Traffic Flow Template，业务流模版)实现per-bearer(按承载)的流量切分，而基站切分业务数据流的能实现的粒度可以与终端侧保持一致，也可以不一致。
在上述技术方案中，优选地，所述终端根据无线局域网络无线接口和蜂窝网络无线接口的传输质量，调整所述无线局域网络无线接口和所述蜂窝网络无线接口的数据流传输比例。
在该技术方案中，通过无线局域网络无线接口和蜂窝网络无线接口进行传输的业务数据流需要实现动态的平衡，以避免影响总体吞吐量的提升，终端可以根据无线局域网络无线接口和蜂窝网络无线接口的传输质量调整其数据流传输比例，以进一步充分WLAN进行灵活和高效率的流量汇聚传输。
在上述技术方案中，优选地，所述传输质量包括：丢包率和传输延迟；以及所述无线局域网络接入点向所述基站汇报无线局域网络空口的平均延迟，以及所述无线局域网络接入点和/或所述基站按预设时间间隔在所述PDCP层协议包或PDCP/RLC层协议包中插入时间戳，以动态监测所述无线局域网络接 入点和所述基站之间的所述传输延迟。
在该技术方案中，无线局域网络无线接口和蜂窝网络无线接口的传输质量包括但不限于丢包率和传输延迟，丢包率与PDCP层协议包或PDCP/RLC层协议包(数据包)长度以及包发送频率有关，而传输延迟需要考虑WLAN空口延迟和数据包从无线局域网络接入点到基站进行中转的延迟，具体地，无线局域网络接入点可以向基站汇报WLAN空口的平均延迟，同时，无线局域网络接入点和/或基站可以在PDCP层协议包或PDCP/RLC层协议包中以预设时间间隔插入时间戳来动态监测无线局域网络接入点和基站之间的传输延迟，如此，可以进一步有效地利用无线局域网络接入点进行流量分担，进而更加灵活地适应无线链路的质量变化。
在上述技术方案中，优选地，所述终端将所述PDCP层协议包或PDCP/RLC层协议包作为所述无线局域网络无线接口的有效负载发送到所述无线局域网络接入点，以及所述无线局域网络接入点将所述PDCP层协议包或PDCP/RLC层协议包发送到所述基站进行PDCP层或PDCP层和RLC层的接收侧处理，以完成所述业务数据流的传输。
在该技术方案中，在上行传输方向，上行业务数据流在终端被切分，其中一部分上行业务数据流经过PDCP层/或PDCP层和RLC层的发送侧处理后封装为PDCP层协议包或PDCP/RLC层协议包，并将其作为无线局域网络无线接口(WLAN RAT)的有效负载(payload)，发送到无线局域网络接入点(AP)，然后通过无线局域网络接入点(AP)与基站(eNB)的接口传输给基站(eNB)，以对PDCP层协议包或PDCP/RLC层协议包进行PDCP层或PDCP层和RLC层的接收侧处理。
在上述技术方案中，优选地，在所述终端对所述业务数据流进行切分之前，还包括：所述无线局域网络接入点与所述基站之间建立逻辑接口，以用于数据面的LTE协议数据在所述无线局域网络接入点与所述基站之间的传输。
在该技术方案中，通过在终端对业务数据流进行切分之前，无线局域网络接入点与基站之间建立逻辑接口，以用于数据面的LTE协议数据在无线局域网络接入点与基站之间的传输，该逻辑接口可以是有线的也可以是无线的，如此，无线局域网络接入点与核心网之间没有直接的逻辑接口，则当基站和无线 局域网络接入点共址时，该逻辑接口即成为网元内部的接口，在业务数据流的切转过程当中，控制信令则可以被基站所隐藏，同时也提高了扩展性。
本发明的又一方面提出了一种传输业务数据流的系统，包括：基站和无线局域网络接入点，其中，所述基站与终端进行业务数据流的传输时，所述基站确定是否需要通过无线局域网络接入点与所述终端进行所述业务数据流的传输；在确定结果为是时，所述基站用于对所述业务数据流进行切分，以传输所述业务数据流。
在该技术方案中，在基站确定需要同时通过无线局域网络接入点以及直接(即通过蜂窝网络，包括LTE)与或终端进行业务数据流的传输时，对该数据业务流进行切分，以实现在接入层(AS层)的无线局域网络(WLAN)聚合，有效地利用无线局域网络接入点进行流量分担，进而更加灵活地适应无线链路的质量变化，以及能够使得无线局域网络(WLAN)流量借由蜂窝网络的信道(backhaul)来实现高的服务质量。
在上述技术方案中，优选地，所述基站具体用于：为所述基站和所述终端分配承载；将切分后的所述业务数据流进行PDCP层或PDCP层和RLC层的发送侧处理，以将切分后的所述业务数据流分别封装为PDCP层协议包或PDCP/RLC层协议包；将所述PDCP层协议包或PDCP/RLC层协议包以统一的序列号通过所述承载进行传输。
在该技术方案中，由于基站对终端的流量内容是透明的，当进行大带宽(带宽通常指信号所占据的频带宽度，大带宽是一个相对量，相对于每个无线接口的可用速率，比如，一个终端的LTE无线接口上可以有1Mb/s的带宽，那么一个4Mb/s带宽的业务流量就可以称为大带宽，即大带宽可以描述为数据速率超过了LTE无线接口上用户期待的带宽占用)的业务数据流的传输时，基站首先为基站和终端分配一个承载(传输载体)，则在业务数据流的上行和下行传输时，基站可以根据无线局域网络接入点和蜂窝网络的无线链路的传输质量对业务数据流进行bit(比特)粒度切分，并将切分后的业务数据流进行PDCP层或PDCP层和RLC层的发送侧处理，将其封装为PDCP层协议包或PDCP/RLC层协议包，并以统一的序列号通过分配的承载进行传输，如此，可以充分利用WLAN进行灵活和高效率的流量汇聚传输，使得WLAN流量借由 蜂窝网络的信道(backhaul)来实现高的服务质量，而且，通过采用统一的序列号进行传输，可以有效地避免协议数据包传输发生乱序的情况。
在上述技术方案中，当进行一般带宽(一般带宽也是一个相对量，指即使不对业务数据流进行切分，仅用LTE无线接口也可以承载)业务数据流的传输时，可以基于每个业务数据流或者承载进行切分。
在上述技术方案中，优选地，所述基站还用于：根据无线局域网络无线接口和蜂窝网络无线接口的传输质量，调整所述无线局域网络无线接口和所述蜂窝网络无线接口的数据流传输比例。
在该技术方案中，通过无线局域网络无线接口和蜂窝网络无线接口进行传输的业务数据流需要实现动态的平衡，以避免影响总体吞吐量的提升，基站可以根据无线局域网络无线接口和蜂窝网络无线接口的传输质量调整其数据流传输比例，以进一步充分WLAN进行灵活和高效率的流量汇聚传输。
在上述技术方案中，优选地，所述传输质量包括：丢包率和传输延迟；以及所述无线局域网络接入点用于向所述基站汇报无线局域网络空口的平均延迟，以及所述无线局域网络接入点和/或所述基站用于按预设时间间隔在所述PDCP层协议包或PDCP/RLC层协议包中插入时间戳，动态监测所述无线局域网络接入点和所述基站之间的所述传输延迟。
在该技术方案中，无线局域网络无线接口和蜂窝网络无线接口的传输质量包括但不限于丢包率和传输延迟，丢包率与PDCP层协议包或PDCP/RLC层协议包(数据包)长度以及包发送频率有关，而传输延迟需要考虑WLAN空口延迟和数据包从无线局域网络接入点到基站进行中转的延迟，具体地，无线局域网络接入点可以向基站汇报WLAN空口的平均延迟，同时，无线局域网络接入点和/或基站可以在PDCP层协议包或PDCP/RLC层协议包中以预设时间间隔插入时间戳来动态监测无线局域网络接入点和基站之间的传输延迟，如此，可以进一步有效地利用无线局域网络接入点进行流量分担，进而更加灵活地适应无线链路的质量变化。
在上述技术方案中，优选地，所述基站用于将所述PDCP层协议包或PDCP/RLC层协议包作为所述无线局域网络无线接口的有效负载发送到所述无线局域网络接入点，以及所述无线局域网络接入点用于将所述PDCP层协议 包或PDCP/RLC层协议包发送到所述终端进行PDCP层或PDCP层和RLC层的接收侧处理，以完成所述业务数据流的传输。
在该技术方案中，在下行传输方向，基站(eNB)将切分后的一部分下行业务数据流经过PDCP层/或PDCP层和RLC层的发送侧处理后封装为PDCP层协议包或PDCP/RLC层协议包，并将其作为无线局域网络无线接口(WLAN RAT)的有效负载(payload)，发送到无线局域网络接入点(AP)，然后通过无线局域网络接入点(AP)与终端(UE)的接口传输给终端，以对PDCP层协议包或PDCP/RLC层协议包进行PDCP层或PDCP层和RLC层的接收侧的处理，然后交给终端的高层。
在上述技术方案中，优选地，所述无线局域网络接入点还用于：在所述基站对所述业务数据流进行切分之前，所述无线局域网络接入点与所述基站之间建立逻辑接口，以用于数据面的LTE协议数据在所述无线局域网络接入点与所述基站之间的传输。
在该技术方案中，通过在基站对业务数据流进行切分之前，所述无线局域网络接入点与基站之间建立逻辑接口，以用于数据面的LTE协议数据在无线局域网络接入点与基站之间的传输，该逻辑接口可以是有线的也可以是无线的，如此，无线局域网络接入点与核心网之间没有直接的逻辑接口，则当基站和无线局域网络接入点共址时，该逻辑接口即成为网元内部的接口，在业务数据流的切转过程当中，控制信令则可以被基站所隐藏，同时也提高了扩展性。
本发明的再一方面提出了一种传输业务数据流的系统，包括：终端和无线局域网络接入点，其中，所述终端与基站进行业务数据流的传输时，所述终端确定是否需要通过无线局域网络接入点与所述基站进行所述业务数据流的传输；在确定结果为是时，所述终端用于对所述业务数据流进行切分，以传输所述业务数据流。
在该技术方案中，在终端确定需要同时通过无线局域网络接入点以及直接(即通过蜂窝网络，包括LTE)与基站进行业务数据流的传输时，对该数据业务流进行切分，以实现在接入层(AS层)的无线局域网络(WLAN)聚合，有效地利用无线局域网络接入点进行流量分担，进而更加灵活地适应无线链路的质量变化，以及能够使得无线局域网络(WLAN)流量借由蜂窝网络的信道 (backhaul)来实现高的服务质量。
在上述技术方案中，优选地，所述终端具体用于：为所述基站和所述终端分配承载；将切分后的所述业务数据流进行PDCP层或PDCP层和RLC层的发送侧处理，以将切分后的所述业务数据流分别封装为PDCP层协议包或PDCP/RLC层协议包；将所述PDCP层协议包或PDCP/RLC层协议包以统一的序列号通过所述承载进行传输。
在该技术方案中，由于基站对终端的流量内容是透明的，当进行大带宽(带宽通常指信号所占据的频带宽度，大带宽是一个相对量，相对于每个无线接口的可用速率，比如，一个终端的LTE无线接口上可以有1Mb/s的带宽，那么一个4Mb/s带宽的业务流量就可以称为大带宽，即大带宽可以描述为数据速率超过了LTE无线接口上用户期待的带宽占用)的业务数据流的传输时，终端首先为基站和终端分配一个承载(传输载体)，则在业务数据流的上行和下行传输时，可以根据无线局域网络接入点和蜂窝网络的无线链路的传输质量对业务数据流进行bit(比特)粒度切分，并将切分后的业务数据流进行PDCP层或PDCP层和RLC层的发送侧处理，将其封装为PDCP层协议包或PDCP/RLC层协议包，并以统一的序列号通过分配的承载进行传输，如此，可以充分利用WLAN进行灵活和高效率的流量汇聚传输，使得WLAN流量借由蜂窝网络的信道(backhaul)来实现高的服务质量，而且，通过采用统一的序列号进行传输，可以有效地避免协议数据包传输发生乱序的情况。
在上述技术方案中，当进行一般带宽(一般带宽也是一个相对量，指即使不对业务数据流进行切分，仅用LTE无线接口也可以承载)业务数据流的传输时，可以基于每个业务数据流或者承载进行切分，以及在终端侧，可以利用TFT(Traffic Flow Template，业务流模版)实现per-bearer(按承载)的流量切分，而基站切分业务数据流的能实现的粒度可以与终端侧保持一致，也可以不一致。
在上述技术方案中，优选地，所述终端还用于：根据无线局域网络无线接口和蜂窝网络无线接口的传输质量，调整所述无线局域网络无线接口和所述蜂窝网络无线接口的数据流传输比例。
在该技术方案中，通过无线局域网络无线接口和蜂窝网络无线接口进行传 输的业务数据流需要实现动态的平衡，以避免影响总体吞吐量的提升，终端可以根据无线局域网络无线接口和蜂窝网络无线接口的传输质量调整其数据流传输比例，以进一步充分WLAN进行灵活和高效率的流量汇聚传输。
在上述技术方案中，优选地，所述传输质量包括：丢包率和传输延迟；以及所述无线局域网络接入点用于向所述基站汇报无线局域网络空口的平均延迟，以及所述无线局域网络接入点和/或所述基站用于按预设时间间隔在所述PDCP层协议包或PDCP/RLC层协议包中插入时间戳，动态监测所述无线局域网络接入点和所述基站之间的所述传输延迟。
在该技术方案中，无线局域网络无线接口和蜂窝网络无线接口的传输质量包括但不限于丢包率和传输延迟，丢包率与PDCP层协议包或PDCP/RLC层协议包(数据包)长度以及包发送频率有关，而传输延迟需要考虑WLAN空口延迟和数据包从无线局域网络接入点到基站进行中转的延迟，具体地，无线局域网络接入点可以向基站汇报WLAN空口的平均延迟，同时，无线局域网络接入点和/或基站可以在PDCP层协议包或PDCP/RLC层协议包中以预设时间间隔插入时间戳来动态监测无线局域网络接入点和基站之间的传输延迟，如此，可以进一步有效地利用无线局域网络接入点进行流量分担，进而更加灵活地适应无线链路的质量变化。
在上述技术方案中，优选地，所述终端用于将所述PDCP层协议包或PDCP/RLC层协议包作为所述无线局域网络无线接口的有效负载发送到所述无线局域网络接入点，以及所述无线局域网络接入点用于将所述PDCP层协议包或PDCP/RLC层协议包发送到所述基站进行PDCP层或PDCP层和RLC层的接收侧处理，以完成所述业务数据流的传输。
在该技术方案中，在上行传输方向，上行业务数据流在终端被切分，其中一部分上行业务数据流经过PDCP层/或PDCP层和RLC层的发送侧处理后封装为PDCP层协议包或PDCP/RLC层协议包，并将其作为无线局域网络无线接口(WLAN RAT)的有效负载(payload)，发送到无线局域网络接入点(AP)，然后通过无线局域网络接入点(AP)与基站(eNB)的接口传输给基站(eNB)，以对PDCP层协议包或PDCP/RLC层协议包进行PDCP层或PDCP层和RLC层的接收侧处理。
在上述技术方案中，优选地，所述无线局域网络接入点还用于：在所述终端对所述业务数据流进行切分之前，所述无线局域网络接入点与所述基站之间建立逻辑接口，以用于数据面的LTE协议数据在所述无线局域网络接入点与所述基站之间的传输。
在该技术方案中，通过在终端对业务数据流进行切分之前，建立无线局域网络接入点与基站之间的逻辑接口，以用于数据面的LTE协议数据在无线局域网络接入点与基站之间的传输，该逻辑接口可以是有线的也可以是无线的，如此，无线局域网络接入点与核心网之间没有直接的逻辑接口，则当基站和无线局域网络接入点共址时，该逻辑接口即成为网元内部的接口，在业务数据流的切转过程当中，控制信令则可以被基站所隐藏，同时也提高了扩展性。
通过本发明的技术方案，可以实现在接入层的无线局域网络聚合，有效地利用无线局域网络接入点进行流量分担，进而更加灵活地适应无线链路的质量变化，以及能够使得无线局域网络流量借由蜂窝网络的信道来实现高的服务质量。
附图说明
图1示出了相关技术中的LTE与WLAN整合的架构示意图；
图2示出了根据本发明的一个实施例的传输业务数据流的方法的流程示意图；
图3示出了根据本发明的另一个实施例的传输业务数据流的方法的流程示意图；
图4示出了根据本发明的一个实施例的AS层实现WLAN RAT整合的协议层示意图；
图5示出了根据本发明的一个实施例的LTE与WLAN整合的架构示意图；
图6示出了根据本发明的另一个实施例的LTE与WLAN整合的架构示意图；
图7示出了根据本发明的一个实施例的传输业务数据流的系统的框图；
图8示出了根据本发明的另一个实施例的传输业务数据流的系统的框图。
具体实施方式
为了可以更清楚地理解本发明的上述目的、特征和优点，下面结合附图和具体实施方式对本发明进行进一步的详细描述。需要说明的是，在不冲突的情况下，本申请的实施例及实施例中的特征可以相互组合。
在下面的描述中阐述了很多具体细节以便于充分理解本发明，但是，本发明还可以采用其他不同于在此描述的其他方式来实施，因此，本发明的保护范围并不受下面公开的具体实施例的限制。
图2示出了根据本发明的一个实施例的传输业务数据流的方法的流程示意图。
如图2所示，根据本发明的一个实施例的传输业务数据流的方法，包括：步骤202，基站与终端进行业务数据流的传输时，所述基站确定是否需要通过无线局域网络接入点与所述终端进行所述业务数据流的传输；步骤204，在确定结果为是时，所述基站对所述业务数据流进行切分，以传输所述业务数据流。
在该技术方案中，在基站确定需要同时通过无线局域网络接入点以及直接(即通过蜂窝网络，包括LTE)与终端进行业务数据流的传输时，对该数据业务流进行切分，以实现在接入层(AS层)的无线局域网络(WLAN)聚合，有效地利用无线局域网络接入点进行流量分担，进而更加灵活地适应无线链路的质量变化，以及能够使得无线局域网络(WLAN)流量借由蜂窝网络的信道(backhaul)来实现高的服务质量。
在上述技术方案中，优选地，所述基站对所述业务数据流进行切分，以传输所述业务数据流，具体包括：为所述基站和所述终端分配承载；所述基站将切分后的所述业务数据流进行PDCP层(Packet data convergence Protocol，分组数据聚合层协议，3GPP无线接入侧的协议层之一)或PDCP层和RLC层(Radio Link control，无线链路控制层协议，3GPP无线接入侧的协议层之一)的发送侧处理，以将切分后的所述业务数据流分别封装为PDCP层协议包或PDCP/RLC层协议包；将所述PDCP层协议包或PDCP/RLC层协议包以统一 的序列号通过所述承载进行传输。
在该技术方案中，由于基站对终端的流量内容是透明的，当进行大带宽(带宽通常指信号所占据的频带宽度，大带宽是一个相对量，相对于每个无线接口的可用速率，比如，一个终端的LTE无线接口上可以有1Mb/s的带宽，那么一个4Mb/s带宽的业务流量就可以称为大带宽，即大带宽可以描述为数据速率超过了LTE无线接口上用户期待的带宽占用)的业务数据流的传输时，基站首先为基站和终端分配一个承载(传输载体)，则在业务数据流的上行和下行传输时，所述基站可以根据无线局域网络接入点和蜂窝网络的无线链路的传输质量对业务数据流进行bit(比特)粒度切分，并将切分后的业务数据流进行PDCP层或PDCP层和RLC层的发送侧处理，将其封装为PDCP层协议包或PDCP/RLC层协议包，并以统一的序列号通过分配的承载进行传输，如此，可以充分利用WLAN进行灵活和高效率的流量汇聚传输，使得WLAN流量借由蜂窝网络的信道(backhaul)来实现高的服务质量，而且，通过采用统一的序列号进行传输，可以有效地避免协议数据包传输发生乱序的情况。
在上述技术方案中，当进行一般带宽(一般带宽也是一个相对量，指即使不对业务数据流进行切分，仅用LTE无线接口也可以承载)业务数据流的传输时，可以基于每个业务数据流或者承载进行切分。
在上述技术方案中，优选地，所述基站根据无线局域网络无线接口和蜂窝网络无线接口的传输质量，调整所述无线局域网络无线接口和所述蜂窝网络无线接口的数据流传输比例。
在该技术方案中，通过无线局域网络无线接口和蜂窝网络无线接口进行传输的业务数据流需要实现动态的平衡，以避免影响总体吞吐量的提升，基站可以根据无线局域网络无线接口和蜂窝网络无线接口的传输质量调整其数据流传输比例，以进一步充分WLAN进行灵活和高效率的流量汇聚传输。
在上述技术方案中，优选地，所述传输质量包括：丢包率和传输延迟；以及所述无线局域网络接入点向所述基站汇报无线局域网络空口的平均延迟，以及所述无线局域网络接入点和/或所述基站按预设时间间隔在所述PDCP层协议包或PDCP/RLC层协议包中插入时间戳，以动态监测所述无线局域网络接入点和所述基站之间的所述传输延迟。
在该技术方案中，无线局域网络无线接口和蜂窝网络无线接口的传输质量包括但不限于丢包率和传输延迟，丢包率与PDCP层协议包或PDCP/RLC层协议包(数据包)长度以及包发送频率有关，而传输延迟需要考虑WLAN空口延迟和数据包从无线局域网络接入点到基站进行中转的延迟，具体地，无线局域网络接入点可以向基站汇报WLAN空口的平均延迟，同时，无线局域网络接入点和/或基站可以在PDCP层协议包或PDCP/RLC层协议包中以预设时间间隔插入时间戳来动态监测无线局域网络接入点和基站之间的传输延迟，如此，可以进一步有效地利用无线局域网络接入点进行流量分担，进而更加灵活地适应无线链路的质量变化。
在上述技术方案中，优选地，所述基站将所述PDCP层协议包或PDCP/RLC层协议包作为所述无线局域网络无线接口的有效负载发送到所述无线局域网络接入点，以及所述无线局域网络接入点将所述PDCP层协议包或PDCP/RLC层协议包发送到所述终端进行PDCP层或PDCP层和RLC层的接收侧处理，以完成所述业务数据流的传输。
在该技术方案中，在下行传输方向，基站(eNB)将切分后的一部分下行业务数据流经过PDCP层/或PDCP层和RLC层的发送侧处理后封装为PDCP层协议包或PDCP/RLC层协议包，并将其作为无线局域网络无线接口(WLAN RAT)的有效负载(payload)，发送到无线局域网络接入点(AP)，然后通过无线局域网络接入点(AP)与终端(UE)的接口传输给终端，以对PDCP层协议包或PDCP/RLC层协议包进行PDCP层或PDCP层和RLC层的接收侧的处理，然后交给终端的高层。
如图4所示，根据本发明的一个实施例的AS层实现WLAN RAT整合的协议层示意图，包括终端和网络侧，该协议层将跨RAT(无线接口)的非蜂窝网络协议，在层二实现与蜂窝网络协议栈的互通，并反应了本发明的方案需要实现的层间原语(primitives),即在RLC层与WLAN LLC层(Logical Link control，逻辑链路控制层)之间的SAP(Service Access point，业务接入点)的定义。
在上述技术方案中，优选地，在所述基站对所述业务数据流进行切分之前，还包括：所述无线局域网络接入点与所述基站之间建立逻辑接口，以用于数据 面的LTE协议数据在所述无线局域网络接入点与所述基站之间的传输。
在该技术方案中，通过在基站对业务数据流进行切分之前，无线局域网络接入点与基站之间建立逻辑接口，以用于数据面的LTE协议数据在无线局域网络接入点与基站之间的传输，该逻辑接口可以是有线的也可以是无线的，如此，无线局域网络接入点与核心网之间没有直接的逻辑接口，则当基站和无线局域网络接入点共址时，该逻辑接口即成为网元内部的接口，在业务数据流的切转过程当中，控制信令则可以被基站所隐藏，同时也提高了扩展性。根据本发明的一个实施例的LTE与WLAN整合的架构方案如图5所示，同时，本发明的技术方案也适用于如图6所示的另一种LTE与WLAN整合的架构方案。
图3示出了根据本发明的另一个实施例的传输业务数据流的方法的流程示意图。
如图3所示，根据本发明的另一个实施例的传输业务数据流的方法，包括：步骤302，终端与基站进行业务数据流的传输时，所述终端确定是否需要通过无线局域网络接入点与所述基站进行所述业务数据流的传输；步骤304，在确定结果为是时，所述终端对所述业务数据流进行切分，以传输所述业务数据流。
在该技术方案中，在终端确定需要同时通过无线局域网络接入点以及直接(即通过蜂窝网络，包括LTE)与基站进行业务数据流的传输时，对该数据业务流进行切分，以实现在接入层(AS层)的无线局域网络(WLAN)聚合，有效地利用无线局域网络接入点进行流量分担，进而更加灵活地适应无线链路的质量变化，以及能够使得无线局域网络(WLAN)流量借由蜂窝网络的信道(backhaul)来实现高的服务质量。
在上述技术方案中，优选地，所述终端对所述业务数据流进行切分，以传输所述业务数据流，具体包括：为所述基站和所述终端分配承载；所述终端将切分后的所述业务数据流进行PDCP层(Packet data convergence Protocol，分组数据聚合层协议，3GPP无线接入侧的协议层之一)或PDCP层和RLC层(Radio Link control，无线链路控制层协议，3GPP无线接入侧的协议层之一)的发送侧处理，以将切分后的所述业务数据流分别封装为PDCP层协议包或PDCP/RLC层协议包；将所述PDCP层协议包或PDCP/RLC层协议包以统一的序列号通过所述承载进行传输。
在该技术方案中，由于基站对终端的流量内容是透明的，当进行大带宽(带宽通常指信号所占据的频带宽度，大带宽是一个相对量，相对于每个无线接口的可用速率，比如，一个终端的LTE无线接口上可以有1Mb/s的带宽，那么一个4Mb/s带宽的业务流量就可以称为大带宽，即大带宽可以描述为数据速率超过了LTE无线接口上用户期待的带宽占用)的业务数据流的传输时，终端首先为基站和终端分配一个承载(传输载体)，则在业务数据流的上行和下行传输时，可以根据无线局域网络接入点和蜂窝网络的无线链路的传输质量对业务数据流进行bit(比特)粒度切分，并将切分后的业务数据流进行PDCP层或PDCP层和RLC层的发送侧处理，将其封装为PDCP层协议包或PDCP/RLC层协议包，并以统一的序列号通过分配的承载进行传输，如此，可以充分利用WLAN进行灵活和高效率的流量汇聚传输，使得WLAN流量借由蜂窝网络的信道(backhaul)来实现高的服务质量，而且，通过采用统一的序列号进行传输，可以有效地避免协议数据包传输发生乱序的情况。
在上述技术方案中，当进行一般带宽(一般带宽也是一个相对量，指即使不对业务数据流进行切分，仅用LTE无线接口也可以承载)业务数据流的传输时，可以基于每个业务数据流或者承载进行切分，以及在终端侧，可以利用TFT(Traffic Flow Template，业务流模版)实现per-bearer(按承载)的流量切分，而基站切分业务数据流的能实现的粒度可以与终端侧保持一致，也可以不一致。
在上述技术方案中，优选地，所述终端根据无线局域网络无线接口和蜂窝网络无线接口的传输质量，调整所述无线局域网络无线接口和所述蜂窝网络无线接口的数据流传输比例。
在该技术方案中，通过无线局域网络无线接口和蜂窝网络无线接口进行传输的业务数据流需要实现动态的平衡，以避免影响总体吞吐量的提升，终端可以根据无线局域网络无线接口和蜂窝网络无线接口的传输质量调整其数据流传输比例，以进一步充分WLAN进行灵活和高效率的流量汇聚传输。
在上述技术方案中，优选地，所述传输质量包括：丢包率和传输延迟；以及所述无线局域网络接入点向所述基站汇报无线局域网络空口的平均延迟，以及所述无线局域网络接入点和/或所述基站按预设时间间隔在所述PDCP层协 议包或PDCP/RLC层协议包中插入时间戳，以动态监测所述无线局域网络接入点和所述基站之间的所述传输延迟。
在该技术方案中，无线局域网络无线接口和蜂窝网络无线接口的传输质量包括但不限于丢包率和传输延迟，丢包率与PDCP层协议包或PDCP/RLC层协议包(数据包)长度以及包发送频率有关，而传输延迟需要考虑WLAN空口延迟和数据包从无线局域网络接入点到基站进行中转的延迟，具体地，无线局域网络接入点可以向基站汇报WLAN空口的平均延迟，同时，无线局域网络接入点和/或基站可以在PDCP层协议包或PDCP/RLC层协议包中以预设时间间隔插入时间戳来动态监测无线局域网络接入点和基站之间的传输延迟，如此，可以进一步有效地利用无线局域网络接入点进行流量分担，进而更加灵活地适应无线链路的质量变化。
在上述技术方案中，优选地，所述终端将所述PDCP层协议包或PDCP/RLC层协议包作为所述无线局域网络无线接口的有效负载发送到所述无线局域网络接入点，以及所述无线局域网络接入点将所述PDCP层协议包或PDCP/RLC层协议包发送到所述基站进行PDCP层或PDCP层和RLC层的接收侧处理，以完成所述业务数据流的传输。
在该技术方案中，在上行传输方向，上行业务数据流在终端被切分，其中一部分上行业务数据流经过PDCP层/或PDCP层和RLC层的发送侧处理后封装为PDCP层协议包或PDCP/RLC层协议包，并将其作为无线局域网络无线接口(WLAN RAT)的有效负载(payload)，发送到无线局域网络接入点(AP)，然后通过无线局域网络接入点(AP)与基站(eNB)的接口传输给基站(eNB)，以对PDCP层协议包或PDCP/RLC层协议包进行PDCP层或PDCP层和RLC层的接收侧处理。
如图4所示，根据本发明的一个实施例的AS层实现WLAN RAT整合的协议层示意图，包括终端和网络侧，该协议层将跨RAT(无线接口)的非蜂窝网络协议，在层二实现与蜂窝网络协议栈的互通，并反应了本发明的方案需要实现的层间原语(primitives),即在RLC层与WLAN LLC层(Logical Link control，逻辑链路控制层)之间的SAP(Service Access point，业务接入点)的定义。
在上述技术方案中，优选地，在所述终端对所述业务数据流进行切分之前，还包括：所述无线局域网络接入点与所述基站之间建立逻辑接口，以用于数据面的LTE协议数据在所述无线局域网络接入点与所述基站之间的传输。
在该技术方案中，通过在终端对业务数据流进行切分之前，所述无线局域网络接入点与基站之间建立逻辑接口，以用于数据面的LTE协议数据在无线局域网络接入点与基站之间的传输，该逻辑接口可以是有线的也可以是无线的，如此，无线局域网络接入点与核心网之间没有直接的逻辑接口，则当基站和无线局域网络接入点共址时，该逻辑接口即成为网元内部的接口，在业务数据流的切转过程当中，控制信令则可以被基站所隐藏，同时也提高了扩展性。根据本发明的一个实施例的LTE与WLAN整合的架构方案如图5所示，同时，本发明的技术方案也适用于如图6所示的另一种LTE与WLAN整合的架构方案。
图7示出了根据本发明的一个实施例的传输业务数据流的系统的框图。
如图7所示，根据本发明的一个实施例的传输业务数据流的系统700，包括：基站702和无线局域网络接入点704，其中，所述基站702与终端进行业务数据流的传输时，所述基站702确定是否需要通过无线局域网络接入点704与所述终端进行所述业务数据流的传输；在确定结果为是时，所述基站702用于对所述业务数据流进行切分，以传输所述业务数据流。
在该技术方案中，在基站702确定需要同时通过无线局域网络接入点704及直接(即通过蜂窝网络，包括LTE)与终端进行业务数据流的传输时，对该数据业务流进行切分，以实现在接入层(AS层)的无线局域网络(WLAN)聚合，有效地利用无线局域网络接入点606进行流量分担，进而更加灵活地适应无线链路的质量变化，以及能够使得无线局域网络(WLAN)流量借由蜂窝网络的信道(backhaul)来实现高的服务质量。
在上述技术方案中，优选地，所述基站702具体用于：为所述基站702和所述终端分配承载；将切分后的所述业务数据流进行PDCP层或PDCP层和RLC层的发送侧处理，以将切分后的所述业务数据流分别封装为PDCP层协议包或PDCP/RLC层协议包；将所述PDCP层协议包或PDCP/RLC层协议包以统一的序列号通过所述承载进行传输。
在该技术方案中，由于基站702对终端的流量内容是透明的，当进行大带宽(带宽通常指信号所占据的频带宽度，大带宽是一个相对量，相对于每个无线接口的可用速率，比如，一个终端的LTE无线接口上可以有1Mb/s的带宽，那么一个4Mb/s带宽的业务流量就可以称为大带宽，即大带宽可以描述为数据速率超过了LTE无线接口上用户期待的带宽占用)的业务数据流的传输时，基站702首先为基站702和终端分配一个承载(传输载体)，则在业务数据流的上行和下行传输时，基站702可以根据无线局域网络接入点704和蜂窝网络的无线链路的传输质量对业务数据流进行bit(比特)粒度切分，并将切分后的业务数据流进行PDCP层或PDCP层和RLC层的发送侧处理，将其封装为PDCP层协议包或PDCP/RLC层协议包，并以统一的序列号通过分配的承载进行传输，如此，可以充分利用WLAN进行灵活和高效率的流量汇聚传输，使得WLAN流量借由蜂窝网络的信道(backhaul)来实现高的服务质量，而且，通过采用统一的序列号进行传输，可以有效地避免协议数据包传输发生乱序的情况。
在上述技术方案中，当进行一般带宽(一般带宽也是一个相对量，指即使不对业务数据流进行切分，仅用LTE无线接口也可以承载)业务数据流的传输时，可以基于每个业务数据流或者承载进行切分。
在上述技术方案中，优选地，所述基站702还用于：根据无线局域网络无线接口和蜂窝网络无线接口的传输质量，调整所述无线局域网络无线接口和所述蜂窝网络无线接口的数据流传输比例。
在该技术方案中，通过无线局域网络无线接口和蜂窝网络无线接口进行传输的业务数据流需要实现动态的平衡，以避免影响总体吞吐量的提升，基站702可以根据无线局域网络无线接口和蜂窝网络无线接口的传输质量调整其数据流传输比例，以进一步充分WLAN进行灵活和高效率的流量汇聚传输。
在上述技术方案中，优选地，所述传输质量包括：丢包率和传输延迟；以及所述无线局域网络接入点704用于向所述基站702汇报无线局域网络空口的平均延迟，以及所述无线局域网络接入点704和/或所述基站702用于按预设时间间隔在所述PDCP层协议包或PDCP/RLC层协议包中插入时间戳，动态监测所述无线局域网络接入点704和所述基站702之间的所述传输延迟。
在该技术方案中，无线局域网络无线接口和蜂窝网络无线接口的传输质量包括但不限于丢包率和传输延迟，丢包率与PDCP层协议包或PDCP/RLC层协议包(数据包)长度以及包发送频率有关，而传输延迟需要考虑WLAN空口延迟和数据包从无线局域网络接入点到基站进行中转的延迟，具体地，无线局域网络接入点704可以向基站702汇报WLAN空口的平均延迟，同时，无线局域网络接入点704和/或基站702可以在PDCP层协议包或PDCP/RLC层协议包中以预设时间间隔插入时间戳来动态监测无线局域网络接入点704和基站702之间的传输延迟，如此，可以进一步有效地利用无线局域网络接入点704进行流量分担，进而更加灵活地适应无线链路的质量变化。
在上述技术方案中，优选地，所述基站702用于将所述PDCP层协议包或PDCP/RLC层协议包作为所述无线局域网络无线接口的有效负载发送到所述无线局域网络接入点704，以及所述无线局域网络接入点704用于将所述PDCP层协议包或PDCP/RLC层协议包发送到所述终端进行PDCP层或PDCP层和RLC层的接收侧处理，以完成所述业务数据流的传输。
在该技术方案中，在下行传输方向，基站702(eNB)将切分后的一部分下行业务数据流经过PDCP层/或PDCP层和RLC层的发送侧处理后封装为PDCP层协议包或PDCP/RLC层协议包，并将其作为无线局域网络无线接口(WLAN RAT)的有效负载(payload)，发送到无线局域网络接入点704(AP)，然后通过无线局域网络接入点704(AP)与终端(UE)的接口传输给终端，以对PDCP层协议包或PDCP/RLC层协议包进行PDCP层或PDCP层和RLC层的接收侧的处理，然后交给终端的高层。
在上述技术方案中，优选地，所述无线局域网络接入点704还用于：在所述基站702对所述业务数据流进行切分之前，所述无线局域网络接入点704与所述基站702之间建立逻辑接口，以用于数据面的LTE协议数据在所述无线局域网络接入点704与所述基站702之间的传输。
在该技术方案中，通过在基站702对业务数据流进行切分之前，无线局域网络接入点704与基站702之间建立逻辑接口，以用于数据面的LTE协议数据在无线局域网络接入点704与基站702之间的传输，该逻辑接口可以是有线的也可以是无线的，如此，无线局域网络接入点704与核心网之间没有直接的 逻辑接口，则当基站702和无线局域网络接入点704共址时，该逻辑接口即成为网元内部的接口，在业务数据流的切转过程当中，控制信令则可以被基站所隐藏，同时也提高了扩展性。
图8示出了根据本发明的另一个实施例的传输业务数据流的系统的框图。
如图8所示，根据本发明的另一个实施例的传输业务数据流的系统800，包括：终端802和无线局域网络接入点804，其中，所述终端802与基站进行业务数据流的传输时，所述终端802确定是否需要通过无线局域网络接入点804与所述基站进行所述业务数据流的传输；在确定结果为是时，所述终端802用于对所述业务数据流进行切分，以传输所述业务数据流。
在该技术方案中，在终端802确定需要同时通过无线局域网络接入点804以及直接(即通过蜂窝网络，包括LTE)与基站进行业务数据流的传输时，对该数据业务流进行切分，以实现在接入层(AS层)的无线局域网络(WLAN)聚合，有效地利用无线局域网络接入点进行流量分担，进而更加灵活地适应无线链路的质量变化，以及能够使得无线局域网络(WLAN)流量借由蜂窝网络的信道(backhaul)来实现高的服务质量。
在上述技术方案中，优选地，所述终端802具体用于：为所述基站和所述终端802分配承载；将切分后的所述业务数据流进行PDCP层或PDCP层和RLC层的发送侧处理，以将切分后的所述业务数据流分别封装为PDCP层协议包或PDCP/RLC层协议包；将所述PDCP层协议包或PDCP/RLC层协议包以统一的序列号通过所述承载进行传输。
在该技术方案中，由于基站对终端802的流量内容是透明的，当进行大带宽(带宽通常指信号所占据的频带宽度，大带宽是一个相对量，相对于每个无线接口的可用速率，比如，一个终端的LTE无线接口上可以有1Mb/s的带宽，那么一个4Mb/s带宽的业务流量就可以称为大带宽，即大带宽可以描述为数据速率超过了LTE无线接口上用户期待的带宽占用)的业务数据流的传输时，终端802首先为基站和终端802分配一个承载(传输载体)，则在业务数据流的上行和下行传输时，所述终端802可以根据无线局域网络接入点804和蜂窝网络的无线链路的传输质量对业务数据流进行bit(比特)粒度切分，并将切分后的业务数据流进行PDCP层或PDCP层和RLC层的发送侧处理，将其封 装为PDCP层协议包或PDCP/RLC层协议包，并以统一的序列号通过分配的承载进行传输，如此，可以充分利用WLAN进行灵活和高效率的流量汇聚传输，使得WLAN流量借由蜂窝网络的信道(backhaul)来实现高的服务质量，而且，通过采用统一的序列号进行传输，可以有效地避免协议数据包传输发生乱序的情况。
在上述技术方案中，当进行一般带宽(一般带宽也是一个相对量，指即使不对业务数据流进行切分，仅用LTE无线接口也可以承载)业务数据流的传输时，可以基于每个业务数据流或者承载进行切分，以及在终端802侧，可以利用TFT(Traffic Flow Template，业务流模版)实现per-bearer(按承载)的流量切分，而基站切分业务数据流的能实现的粒度可以与终端侧保持一致，也可以不一致。
在上述技术方案中，优选地，所述终端802还用于：根据无线局域网络无线接口和蜂窝网络无线接口的传输质量，调整所述无线局域网络无线接口和所述蜂窝网络无线接口的数据流传输比例。
在该技术方案中，通过无线局域网络无线接口和蜂窝网络无线接口进行传输的业务数据流需要实现动态的平衡，以避免影响总体吞吐量的提升，终端802可以根据无线局域网络无线接口和蜂窝网络无线接口的传输质量调整其数据流传输比例，以进一步充分WLAN进行灵活和高效率的流量汇聚传输。
在上述技术方案中，优选地，所述传输质量包括：丢包率和传输延迟；以及所述无线局域网络接入点804用于向所述基站汇报无线局域网络空口的平均延迟，以及所述无线局域网络接入点804和/或所述基站用于按预设时间间隔在所述PDCP层协议包或PDCP/RLC层协议包中插入时间戳，动态监测所述无线局域网络接入点804和所述基站之间的所述传输延迟。
在该技术方案中，无线局域网络无线接口和蜂窝网络无线接口的传输质量包括但不限于丢包率和传输延迟，丢包率与PDCP层协议包或PDCP/RLC层协议包(数据包)长度以及包发送频率有关，而传输延迟需要考虑WLAN空口延迟和数据包从无线局域网络接入点804到基站进行中转的延迟，具体地，无线局域网络接入点804可以向基站汇报WLAN空口的平均延迟，同时，无线局域网络接入点804和/或基站可以在PDCP层协议包或PDCP/RLC层协议 包中以预设时间间隔插入时间戳来动态监测无线局域网络接入点804和基站之间的传输延迟，如此，可以进一步有效地利用无线局域网络接入点804进行流量分担，进而更加灵活地适应无线链路的质量变化。
在上述技术方案中，优选地，所述终端802用于将所述PDCP层协议包或PDCP/RLC层协议包作为所述无线局域网络无线接口的有效负载发送到所述无线局域网络接入点804，以及所述无线局域网络接入点804用于将所述PDCP层协议包或PDCP/RLC层协议包发送到所述基站进行PDCP层或PDCP层和RLC层的接收侧处理，以完成所述业务数据流的传输。
在该技术方案中，在上行传输方向，上行业务数据流在终端802被切分，其中一部分上行业务数据流经过PDCP层/或PDCP层和RLC层的发送侧处理后封装为PDCP层协议包或PDCP/RLC层协议包，并将其作为无线局域网络无线接口(WLAN RAT)的有效负载(payload)，发送到无线局域网络接入点804(AP)，然后通过无线局域网络接入点804(AP)与基站(eNB)的接口传输给基站(eNB)，以对PDCP层协议包或PDCP/RLC层协议包进行PDCP层或PDCP层和RLC层的接收侧处理。
在上述技术方案中，优选地，所述无线局域网络接入点804还用于：在所述终端802对所述业务数据流进行切分之前，建立所述无线局域网络接入点804与所述基站之间的逻辑接口，以用于数据面的LTE协议数据在所述无线局域网络接入点804与所述基站之间的传输。
在该技术方案中，通过在终端802对业务数据流进行切分之前，无线局域网络接入点804与基站之间建立逻辑接口，以用于数据面的LTE协议数据在无线局域网络接入点804与基站之间的传输，该逻辑接口可以是有线的也可以是无线的，如此，无线局域网络接入点804与核心网之间没有直接的逻辑接口，则当基站和无线局域网络接入点804共址时，该逻辑接口即成为网元内部的接口，在业务数据流的切转过程当中，控制信令则可以被基站所隐藏，同时也提高了扩展性。
以上结合附图详细说明了本发明的技术方案，可以实现在接入层的无线局域网络聚合，有效地利用无线局域网络接入点进行流量分担，进而更加灵活地适应无线链路的质量变化，以及能够使得无线局域网络流量借由蜂窝网络的信 道来实现高的服务质量。
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。

Claims (24)

  1. 一种传输业务数据流的方法，其特征在于，包括：
    基站与终端进行业务数据流的传输时，所述基站确定是否需要通过无线局域网络接入点与所述终端进行所述业务数据流的传输；
    在确定结果为是时，所述基站对所述业务数据流进行切分，以传输所述业务数据流。
  2. 根据权利要求1所述的传输业务数据流的方法，其特征在于，所述基站对所述业务数据流进行切分，以传输所述业务数据流，具体包括：
    为所述基站和所述终端分配承载；
    所述基站将切分后的所述业务数据流进行PDCP层或PDCP层和RLC层的发送侧处理，以将切分后的所述业务数据流分别封装为PDCP层协议包或PDCP/RLC层协议包；
    将所述PDCP层协议包或PDCP/RLC层协议包以统一的序列号通过所述承载进行传输。
  3. 根据权利要求2所述的传输业务数据流的方法，其特征在于，
    所述基站根据无线局域网络无线接口和蜂窝网络无线接口的传输质量，调整所述无线局域网络无线接口和所述蜂窝网络无线接口的数据流传输比例。
  4. 根据权利要求3所述的传输业务数据流的方法，其特征在于，
    所述传输质量包括：丢包率和传输延迟；以及
    所述无线局域网络接入点向所述基站汇报无线局域网络空口的平均延迟，以及所述无线局域网络接入点和/或所述基站按预设时间间隔在所述PDCP层协议包或PDCP/RLC层协议包中插入时间戳，以动态监测所述无线局域网络接入点和所述基站之间的所述传输延迟。
  5. 根据权利要求3所述的传输业务数据流的方法，其特征在于，
    所述基站将所述PDCP层协议包或PDCP/RLC层协议包作为所述无线局域网络无线接口的有效负载发送到所述无线局域网络接入点，以及所述无线局域网络接入点将所述PDCP层协议包或PDCP/RLC层协议包发送到所述终端进行PDCP层或PDCP层和RLC层的接收侧处理，以完成所述业务数据流的 传输。
  6. 根据权利要求1至5中任一项所述的传输业务数据流的方法，其特征在于，在所述基站对所述业务数据流进行切分之前，还包括：
    所述无线局域网络接入点与所述基站之间建立逻辑接口，以用于数据面的LTE协议数据在所述无线局域网络接入点与所述基站之间的传输。
  7. 一种传输业务数据流的方法，其特征在于，包括：
    终端与基站进行业务数据流的传输时，所述终端确定是否需要通过无线局域网络接入点与所述基站进行所述业务数据流的传输；
    在确定结果为是时，所述终端对所述业务数据流进行切分，以传输所述业务数据流。
  8. 根据权利要求7所述的传输业务数据流的方法，其特征在于，所述终端对所述业务数据流进行切分，以传输所述业务数据流，具体包括：
    为所述基站和所述终端分配承载；
    所述终端将切分后的所述业务数据流进行PDCP层或PDCP层和RLC层的发送侧处理，以将切分后的所述业务数据流分别封装为PDCP层协议包或PDCP/RLC层协议包；
    将所述PDCP层协议包或PDCP/RLC层协议包以统一的序列号通过所述承载进行传输。
  9. 根据权利要求8所述的传输业务数据流的方法，其特征在于，
    所述终端根据无线局域网络无线接口和蜂窝网络无线接口的传输质量，调整所述无线局域网络无线接口和所述蜂窝网络无线接口的数据流传输比例。
  10. 根据权利要求9所述的传输业务数据流的方法，其特征在于，
    所述传输质量包括：丢包率和传输延迟；以及
    所述无线局域网络接入点向所述基站汇报无线局域网络空口的平均延迟，以及所述无线局域网络接入点和/或所述基站按预设时间间隔在所述PDCP层协议包或PDCP/RLC层协议包中插入时间戳，以动态监测所述无线局域网络接入点和所述基站之间的所述传输延迟。
  11. 根据权利要求9所述的传输业务数据流的方法，其特征在于，
    所述终端将所述PDCP层协议包或PDCP/RLC层协议包作为所述无线局 域网络无线接口的有效负载发送到所述无线局域网络接入点，以及所述无线局域网络接入点将所述PDCP层协议包或PDCP/RLC层协议包发送到所述基站进行PDCP层或PDCP层和RLC层的接收侧处理，以完成所述业务数据流的传输。
  12. 根据权利要求7至11中任一项所述的传输业务数据流的方法，其特征在于，在所述终端对所述业务数据流进行切分之前，还包括：
    所述无线局域网络接入点与所述基站之间建立逻辑接口，以用于数据面的LTE协议数据在所述无线局域网络接入点与所述基站之间的传输。
  13. 一种传输业务数据流的系统，其特征在于，包括：
    基站和无线局域网络接入点，其中，
    所述基站与终端进行业务数据流的传输时，所述基站确定是否需要通过无线局域网络接入点与所述终端进行所述业务数据流的传输；
    在确定结果为是时，所述基站用于对所述业务数据流进行切分，以传输所述业务数据流。
  14. 根据权利要求13所述的传输业务数据流的系统，其特征在于，所述基站具体用于：
    为所述基站和所述终端分配承载；
    将切分后的所述业务数据流进行PDCP层或PDCP层和RLC层的发送侧处理，以将切分后的所述业务数据流分别封装为PDCP层协议包或PDCP/RLC层协议包；
    将所述PDCP层协议包或PDCP/RLC层协议包以统一的序列号通过所述承载进行传输。
  15. 根据权利要求14所述的传输业务数据流的系统，其特征在于，所述基站还用于：
    根据无线局域网络无线接口和蜂窝网络无线接口的传输质量，调整所述无线局域网络无线接口和所述蜂窝网络无线接口的数据流传输比例。
  16. 根据权利要求15所述的传输业务数据流的系统，其特征在于，
    所述传输质量包括：丢包率和传输延迟；以及
    所述无线局域网络接入点用于向所述基站汇报无线局域网络空口的平均 延迟，以及所述无线局域网络接入点和/或所述基站用于按预设时间间隔在所述PDCP层协议包或PDCP/RLC层协议包中插入时间戳，动态监测所述无线局域网络接入点和所述基站之间的所述传输延迟。
  17. 根据权利要求15所述的传输业务数据流的系统，其特征在于，
    所述基站用于将所述PDCP层协议包或PDCP/RLC层协议包作为所述无线局域网络无线接口的有效负载发送到所述无线局域网络接入点，以及
    所述无线局域网络接入点用于将所述PDCP层协议包或PDCP/RLC层协议包发送到所述终端或所述基站进行PDCP层或PDCP层和RLC层的接收侧处理，以完成所述业务数据流的传输。
  18. 根据权利要求13至17中任一项所述的传输业务数据流的系统，其特征在于，所述无线局域网络接入点还用于：
    在所述基站对所述业务数据流进行切分之前，所述无线局域网络接入点与所述基站之间建立逻辑接口，以用于数据面的LTE协议数据在所述无线局域网络接入点与所述基站之间的传输。
  19. 一种传输业务数据流的系统，其特征在于，包括：
    终端和无线局域网络接入点，其中，
    所述终端与基站进行业务数据流的传输时，所述终端确定是否需要通过无线局域网络接入点与所述基站进行所述业务数据流的传输；
    在确定结果为是时，所述终端用于对所述业务数据流进行切分，以传输所述业务数据流。
  20. 根据权利要求19所述的传输业务数据流的系统，其特征在于，所述终端具体用于：
    为所述基站和所述终端分配承载；
    将切分后的所述业务数据流进行PDCP层或PDCP层和RLC层的发送侧处理，以将切分后的所述业务数据流分别封装为PDCP层协议包或PDCP/RLC层协议包；
    将所述PDCP层协议包或PDCP/RLC层协议包以统一的序列号通过所述承载进行传输。
  21. 根据权利要求20所述的传输业务数据流的系统，其特征在于，所述 终端还用于：
    根据无线局域网络无线接口和蜂窝网络无线接口的传输质量，调整所述无线局域网络无线接口和所述蜂窝网络无线接口的数据流传输比例。
  22. 根据权利要求21所述的传输业务数据流的系统，其特征在于，
    所述传输质量包括：丢包率和传输延迟；以及
    所述无线局域网络接入点用于向所述基站汇报无线局域网络空口的平均延迟，以及所述无线局域网络接入点和/或所述基站用于按预设时间间隔在所述PDCP层协议包或PDCP/RLC层协议包中插入时间戳，动态监测所述无线局域网络接入点和所述基站之间的所述传输延迟。
  23. 根据权利要求21所述的传输业务数据流的系统，其特征在于，
    所述终端用于将所述PDCP层协议包或PDCP/RLC层协议包作为所述无线局域网络无线接口的有效负载发送到所述无线局域网络接入点，以及
    所述无线局域网络接入点用于将所述PDCP层协议包或PDCP/RLC层协议包发送到所述终端或所述基站进行PDCP层或PDCP层和RLC层的接收侧处理，以完成所述业务数据流的传输。
  24. 根据权利要求19至23中任一项所述的传输业务数据流的系统，其特征在于，所述无线局域网络接入点还用于：
    在所述终端对所述业务数据流进行切分之前，所述无线局域网络接入点与所述基站之间建立逻辑接口，以用于数据面的LTE协议数据在所述无线局域网络接入点与所述基站之间的传输。
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