WO2016161723A1

WO2016161723A1 - Method and system for transmitting service data flow

Info

Publication number: WO2016161723A1
Application number: PCT/CN2015/085863
Authority: WO
Inventors: 雷艺学; 李明菊; 张云飞; 何成名
Original assignee: 宇龙计算机通信科技(深圳)有限公司
Priority date: 2015-04-10
Filing date: 2015-07-31
Publication date: 2016-10-13
Also published as: CN104735728A

Abstract

Proposed are a method for transmitting a service data flow and a system for transmitting a service data flow, the method comprising: when a base station transmits a service data flow with a terminal, the base station determining whether it is necessary to transmit the service data flow with the terminal via a wireless local area network access point; and when the result of the determination is yes, the base station segmenting the service data flow so as to transmit the service data flow. By means of the technical solutions of the present invention, wireless local area network aggregation on an access layer can be realized, a wireless local area network access point is effectively utilized to perform traffic sharing so as to be more flexibly adapted to changes in the quality of a wireless link, and a wireless local area network flow can be enabled to realize a high service quality by virtue of a channel of a cellular network.

Description

Method and system for transmitting service data streams

The present application claims priority to Chinese Patent Application No. 201510169646.7, entitled "Method and System for Transmitting Service Data Streams", which is incorporated herein by reference. in.

Technical field

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.

Background technique

Now, with the increasing development of mobile terminal user and various mobile applications, such as the conventional wireless communication system ^{4G LTE (the 4 th generation mobile} communication technology Long Term Evolution, LTE fourth generation mobile communication technology), LTE The -A (Long Term Evolution-Advanced) system cannot meet the bandwidth requirements of users for high-speed wireless access. At the same time, while increasing access bandwidth, how to reduce costs is also a very important factor. Using the low-cost advantage of WLAN (Wireless Local Area Network) to compensate for the lack of bandwidth of LTE and its enhanced technology LTE-A has become a very promising direction.

Existing WLAN and Cellular (cellular) network integration technology is mainly defined in the 3GPP (3 ^rd Generation Partnership Project, Third Generation Partnership Project). There are two existing solutions in 3GPP: one is integration in the core network (refer to TS 23.402), and the other is integration at the RAN (Residential Access Network) level (refer to TS 23.401, TS 36.304, TS 36.331). ). The integration at the RAN level is the RAN-assisted WLAN interworking solution defined by 3GPP Release 12. Regardless of whether it is a core network integration solution or a RAN-assisted WLAN interworking solution, the aggregation of user plane data at the AS layer (Access Stratum, access layer) is not supported. Therefore, WLANs cannot be fully utilized for flexible and efficient traffic aggregation transmission. As shown in FIG. 1 , it is a schematic diagram of an architecture of existing LTE and WLAN integration.

Specifically, under the core network integration solution and the RAN-assisted WLAN interworking solution, 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:

(1) The backhaul (channel) of the cellular network with high quality of service cannot be utilized to support service data transmission.

(2) When the quality of the radio link of the cellular network or the WLAN changes, the signaling overhead caused by the switching between the RAT (Radio Access Type) is large, which is mainly due to the established radio bearer. It is visible to the core network. Therefore, during the service flow switching process, the control signaling needs to be controlled by the core network entity and cannot be hidden by the base station.

(3) The scalability is poor. As the number of WLAN APs (Wireless Local Area Networks Access Point) increases, the logical connection of the WLAN AP to the core network increases, which brings a lot to the cellular network. The challenge.

Therefore, how to implement WLAN aggregation at the AS layer to effectively utilize WLAN APs for traffic sharing, and improve the scalability of WLAN integration, thereby more flexibly adapting to the quality change of the wireless link, and enabling WLAN traffic to be borrowed. The backhaul of cellular networks to achieve high quality of service has become a technical problem that needs to be solved.

Summary of the invention

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. The quality of the changes, as well as enabling wireless local area network traffic to achieve high quality of service through the channels of the cellular network.

In view of this, 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.

In the technical solution, when 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 The quality of the changes, as well as enabling wireless local area network (WLAN) traffic to achieve high quality of service through the backhaul of the cellular network.

In the above technical solution, preferably, 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.

In this technical solution, since 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. 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.

In the above technical solution, when 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.

In the above technical solution, preferably, 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.

In this technical solution, 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.

In the above technical solution, preferably, 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.

In this technical solution, 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. And 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. Specifically, the WLAN access point can report the average delay of the WLAN air interface to the base station. At the same time, 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. In this way, the WLAN access point can be further effectively utilized for traffic sharing, thereby more flexibly adapting to the quality change of the wireless link.

In the above technical solution, preferably, 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, and 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.

In the technical solution, in the downlink transmission direction, the base station (eNB) 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 ( 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.

In the above technical solution, 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.

In the technical solution, 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. Between the transmission, 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. During the process of switching the service data flow, 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.

In the technical solution, when 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.

In the foregoing technical solution, 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.

In this technical solution, since the base station is transparent to the traffic content of the terminal, when performing large bandwidth (band Width generally refers to the bandwidth occupied by the signal. The large bandwidth is a relative amount. Compared to the available rate of each wireless interface, for example, a terminal can have 1 Mb/s bandwidth on the LTE radio interface, then a 4 Mb/s bandwidth. 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. Can make full use of WLAN for flexible and efficient traffic aggregation transmission, enabling WLAN traffic to achieve high quality of service by means of cellular network backhaul Moreover, by using a unified sequence number transmitted, the situation can be effectively avoided scrambled packet transmission protocol occurs.

In the above technical solution, when 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 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.

In the above technical solution, preferably, 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.

In the technical solution, 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.

In the above technical solution, preferably, 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.

In the above technical solution, preferably, 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.

In the technical solution, in the uplink transmission direction, 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.

In the above technical solution, preferably, before the terminal splits 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.

In the technical solution, before the terminal divides the service data stream, 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. Between the transmission, 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. During the process of switching the service data flow, 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.

In the technical solution, when 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.

In the foregoing technical solution, 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.

In this technical solution, since 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. 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.

In the above technical solution, preferably, 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.

In the above technical solution, preferably, 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.

In the above technical solution, preferably, 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, And 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.

In the technical solution, in the downlink transmission direction, the base station (eNB) 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 ( 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.

In the above technical solution, preferably, 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.

In the technical solution, 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. Thus, there is no direct logical interface between the WLAN access point and the core network, and the base station and the WLAN access point are common. In the address, the logical interface becomes the internal interface of the network element. During the process of switching the service data flow, 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.

In the technical solution, when 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.

In the foregoing technical solution, preferably, 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.

In this technical solution, since 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. 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. 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. Moreover, by using a uniform sequence number for transmission, it is possible to effectively avoid the disorder of protocol packet transmission.

In the above technical solution, preferably, 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.

In this technical solution, 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.

In the above technical solution, preferably, 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, And 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.

In the above technical solution, preferably, 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.

In the technical solution, 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. Thus, there is no direct logical interface between the wireless local area network access point and the core network, and the base station and the wireless local area network access point are co-located. The logical interface becomes the internal interface of the network element. During the switching process of the service data flow, the control signaling can be hidden by the base station, and the scalability is also improved.

Through the technical solution of the present invention, 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.

DRAWINGS

FIG. 1 is a schematic structural diagram of LTE and WLAN integration in the related art;

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.

detailed description

The above described objects, features and advantages of the present invention will become more apparent from the detailed description of the appended claims. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict.

In the following description, numerous specific details are set forth in order to provide a full understanding of the invention, but the invention may be practiced otherwise than as described herein. Limitations of the embodiments.

2 shows a flow diagram of a method of transmitting a traffic data stream in accordance with one embodiment of the present invention.

As shown in FIG. 2, a method for transmitting a service data stream according to an embodiment of the present invention 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.

In the technical solution, when 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.

In the above technical solution, preferably, 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.

In this technical solution, since 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. 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.

As shown in FIG. 4, 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).

In the above technical solution, preferably, before the base station severes the service data stream, 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.

In the technical solution, 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. Between the transmission, 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. During the process of switching the service data flow, 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. At the same time, 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.

As shown in FIG. 3, a method for transmitting a service data stream according to another embodiment of the present invention 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.

In the above technical solution, preferably, 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.

In the technical solution, 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. Thus, there is no direct logical interface between the WLAN access point and the core network, and the base station and the WLAN access point are common. In the address, the logical interface becomes the internal interface of the network element. During the process of switching the service data flow, 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. At the same time, 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.

As shown in FIG. 7, a system 700 for transmitting a service data stream according to an embodiment of the present invention 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.

In the technical solution, when 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. To achieve wireless local area network (WLAN) aggregation at the access layer (AS layer), 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.

In the foregoing technical solution, 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.

In this technical solution, since 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, For example, 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. 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. And 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.

In the foregoing technical solution, preferably, 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.

In this technical solution, 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.

In the above technical solution, preferably, 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 delay between point 704 and the base station 702.

In this technical solution, 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. And 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. Specifically, the WLAN access point 704 can report the average of the WLAN air interface to the base station 702. At the same time, 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.

In the foregoing technical solution, preferably, 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. 704, and 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.

In the technical solution, in the downlink transmission direction, the base station 702 (eNB) 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.

In the above technical solution, preferably, 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.

In this technical solution, 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.

As shown in FIG. 8, a system 800 for transmitting a service data stream according to another embodiment of the present invention 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.

In the technical solution, when 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. To achieve 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 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.

In the foregoing technical solution, 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.

In this technical solution, since the base station is transparent to the traffic content of the terminal 802, 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, For example, 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. When the bandwidth of the service data stream is transmitted, 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. 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. Thus, 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.

In the above technical solution, when 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 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.

In the above technical solution, preferably, 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.

In this technical solution, 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.

In the above technical solution, preferably, 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.

In this technical solution, 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. And 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. Specifically, the WLAN access point 804 can report the average of the WLAN air interface to the base station. Delay, at the same time, 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. Thus, 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.

In the foregoing technical solution, preferably, 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. 804, and 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.

In the technical solution, in the uplink transmission direction, 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 ( The 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.

In the above technical solution, preferably, 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.

In this technical solution, 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. During the switching process of the service data flow, 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.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

A method for transmitting a service data stream, comprising:

When the base station and the terminal transmit the service data stream, the base station determines whether the service data stream needs to be transmitted through the WLAN access point and the terminal;

When the determination result is yes, the base station performs segmentation on the service data stream to transmit the service data stream.
The method for transmitting a service data stream according to claim 1, wherein the base station performs segmentation on the service data stream to transmit the service data stream, and specifically includes:

Allocating bearers for the base station and the terminal;

The base station performs processing on the PDCP layer or the PDCP layer and the RLC layer on the transmitting side of the service data stream to encapsulate the segmented service data stream into a PDCP layer protocol packet or a PDCP/RLC layer, respectively. Agreement package

The PDCP layer protocol packet or the PDCP/RLC layer protocol packet is transmitted through the bearer with a uniform sequence number.
A method of transmitting a traffic data stream according to claim 2, wherein

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.
A method of transmitting a traffic data stream according to claim 3, wherein

The transmission quality includes: a packet loss rate and a transmission delay;

Transmitting, by the WLAN access point, the average delay of the WLAN air interface to the base station, and the WLAN access point and/or the base station at the PDCP layer protocol packet or PDCP according to a preset time interval A timestamp is inserted in the /RLC layer protocol packet to dynamically monitor the transmission delay between the WLAN access point and the base station.
A method of transmitting a traffic data stream according to claim 3, wherein

Transmitting, by the base station, 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, and the wireless local area network access point The PDCP layer protocol packet or the PDCP/RLC layer protocol packet is sent to the terminal for processing on the PDCP layer or the PDCP layer and the RLC layer to complete the service data flow. transmission.
The method for transmitting a service data stream according to any one of claims 1 to 5, further comprising: before the base station severing the service data stream, the method further comprises:

Establishing a logical interface between the WLAN access point and the base station for transmission of LTE protocol data of the data plane between the WLAN access point and the base station.
A method for transmitting a service data stream, comprising:

When the terminal and the base station transmit the service data stream, the terminal determines whether the service data stream needs to be transmitted by using the WLAN access point and the base station;

When the determination result is yes, the terminal segments the service data stream to transmit the service data stream.
The method for transmitting a service data stream according to claim 7, wherein the terminal splits the service data stream to transmit the service data stream, and specifically includes:

Allocating bearers for the base station and the terminal;

The terminal processes the segmented service data stream by the PDCP layer or the PDCP layer and the RLC layer to encapsulate the segmented service data stream into a PDCP layer protocol packet or a PDCP/RLC layer. Agreement package

The PDCP layer protocol packet or the PDCP/RLC layer protocol packet is transmitted through the bearer with a uniform sequence number.
A method of transmitting a traffic data stream according to claim 8 wherein:

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.
A method of transmitting a traffic data stream according to claim 9 wherein:

The transmission quality includes: a packet loss rate and a transmission delay;

Transmitting, by the WLAN access point, the average delay of the WLAN air interface to the base station, and the WLAN access point and/or the base station at the PDCP layer protocol packet or PDCP according to a preset time interval A timestamp is inserted in the /RLC layer protocol packet to dynamically monitor the transmission delay between the WLAN access point and the base station.
A method of transmitting a traffic data stream according to claim 9 wherein:

The terminal uses the PDCP layer protocol packet or a PDCP/RLC layer protocol packet as the wireless office Transmitting a payload of the domain network wireless interface to the WLAN access point, and the WLAN access point transmits the PDCP layer protocol packet or PDCP/RLC layer protocol packet to the base station for PDCP layer or The receiving side of the PDCP layer and the RLC layer processes to complete the transmission of the service data stream.
The method for transmitting a service data stream according to any one of claims 7 to 11, wherein before the terminal segments the service data stream, the method further includes:

Establishing a logical interface between the WLAN access point and the base station for transmission of LTE protocol data of the data plane between the WLAN access point and the base station.
A system for transmitting a service data stream, comprising:

Base station and WLAN access point, wherein

When the base station and the terminal transmit the service data stream, the base station determines whether the service data stream needs to be transmitted through the WLAN access point and 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 system for transmitting a service data stream according to claim 13, wherein the base station is specifically configured to:

Allocating bearers for the base station and the terminal;

Transmitting the segmented service data stream to a PDCP layer or a PDCP layer and a RLC layer, and processing the segmented service data stream into a PDCP layer protocol packet or a PDCP/RLC layer protocol packet;

The PDCP layer protocol packet or the PDCP/RLC layer protocol packet is transmitted through the bearer with a uniform sequence number.
The system for transmitting a service data stream according to claim 14, wherein the base station is further configured to:

Adjusting 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.
A system for transmitting a service data stream according to claim 15, wherein:

The transmission quality includes: a packet loss rate and a transmission delay;

The WLAN access point is configured to report the average of the WLAN air interface to the base station Delaying, and the WLAN access point and/or the base station 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 The transmission delay between the access point and the base station.
A system for transmitting a service data stream according to claim 15, wherein:

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, and

The WLAN access point is configured to send the PDCP layer protocol packet or a PDCP/RLC layer protocol packet to the terminal or the base station to perform processing on a PDCP layer or a PDCP layer and an RLC layer, to complete the The transmission of the business data stream.
The system for transmitting a service data stream according to any one of claims 13 to 17, wherein the WLAN access point is further configured to:

Before the base station severes the service data stream, a logical interface is established between the WLAN access point and the base station, and the LTE protocol data for the data plane is accessed in the WLAN. The transmission between the point and the base station.
A system for transmitting a service data stream, comprising:

Terminal and WLAN access point, where

When the terminal and the base station transmit the service data stream, the terminal determines whether the service data stream needs to be transmitted through the WLAN access point and 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 system for transmitting a service data stream according to claim 19, wherein the terminal is specifically configured to:

Allocating bearers for the base station and the terminal;

Transmitting the segmented service data stream to a PDCP layer or a PDCP layer and a RLC layer, and processing the segmented service data stream into a PDCP layer protocol packet or a PDCP/RLC layer protocol packet;

The PDCP layer protocol packet or the PDCP/RLC layer protocol packet is transmitted through the bearer with a uniform sequence number.
A system for transmitting a traffic data stream according to claim 20, wherein said The terminal is also used to:

Adjusting 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.
A system for transmitting a traffic data stream according to claim 21, wherein

The transmission quality includes: a packet loss rate and a transmission delay;

The WLAN access point is configured to report an average delay of the WLAN air interface to the base station, and the WLAN access point and/or the base station is configured to be at the PDCP layer at preset time intervals A timestamp is inserted in the protocol packet or the PDCP/RLC layer protocol packet to dynamically monitor the transmission delay between the WLAN access point and the base station.
A system for transmitting a traffic data stream according to claim 21, wherein

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, and

The WLAN access point is configured to send the PDCP layer protocol packet or a PDCP/RLC layer protocol packet to the terminal or the base station to perform processing on a PDCP layer or a PDCP layer and an RLC layer, to complete the The transmission of the business data stream.
The system for transmitting a service data stream according to any one of claims 19 to 23, wherein the WLAN access point is further configured to:

Before the terminal divides the service data stream, a logical interface is established between the WLAN access point and the base station, and the LTE protocol data for the data plane is accessed in the WLAN. The transmission between the point and the base station.