CN109842884B

CN109842884B - LWA deployment method and system

Info

Publication number: CN109842884B
Application number: CN201711216135.1A
Authority: CN
Inventors: 刘璐
Original assignee: China Mobile Communications Group Co Ltd; China Mobile Group Shanghai Co Ltd
Current assignee: China Mobile Communications Group Co Ltd; China Mobile Group Shanghai Co Ltd
Priority date: 2017-11-28
Filing date: 2017-11-28
Publication date: 2022-04-01
Anticipated expiration: 2037-11-28
Also published as: CN109842884A

Abstract

The invention provides an LWA deployment method and system, comprising: s1, increasing LWAAP under the PDCP layer of the base station; s2, adding a data radio bearer identification (DRB ID) in a packet data convergence protocol data unit (PDCP PDU) message generated by the LWA AP to obtain the LWA PDU message; s3, adding LWA specific Ethernet type in the transmission layer, so that the message of the LWA PDU is forwarded to the WLAN AP through the transmission layer. According to the LWA deployment method and the LWA deployment system, the WT function is integrated into the LTE base station, so that WT and Xw interfaces are omitted in the LWA deployment, and the current network reconstruction cost and the engineering quantity are greatly reduced.

Description

LWA deployment method and system

Technical Field

The invention relates to the technical field of mobile communication, in particular to an LWA deployment method and an LWA deployment system.

Background

With the rapid growth of mobile broadband users and the enormous demand for rate bandwidth capacity, the original licensed spectrum of operators is limited, and a large amount of unlicensed spectrum is available globally, and lwa (lte and WLAN aggregation) technology is in force. The LWA is to aggregate LTE and WIFI and serve users at the same time, and defines two deployment modes: co-sited deployment and non-co-sited deployment.

For a non-co-location deployment manner, in the prior art, edge devices (WLAN Terminal, WT) of a WLAN are mainly used for implementation, and the WT is a logical network element device newly defined by 3GPP, and may be an independent network device or may need to be integrated in a WLAN Access Controller (AC) or a WLAN Access Point (AP). Regardless of the above device form, the LTE base station eNodeB and the WT are required to establish a newly defined Xw interface, and the WT and the UE establish a two-layer connection.

The LWA deployment method used in the prior art needs to introduce a new network element to implement an Xw interface, and at the same time, software upgrading is needed for both an LTE base station and an AP of WIFI of an existing network, which is too large for engineering quantity of existing network modification and is not easy to implement.

Disclosure of Invention

The present invention provides an LWA deployment method and system that overcomes, or at least partially solves, the above mentioned problems, the method comprising:

s1, increasing LWA AP below a packet data convergence protocol PDCP layer of the base station;

s2, adding a data radio bearer identification (DRB ID) in a packet data convergence protocol data unit (PDCP PDU) message generated by the LWAAP to obtain a message of the LWA PDU;

s3, adding LWA specific Ethernet type in the transmission layer, so that the message of the LWA PDU is forwarded to the WLAN AP through the transmission layer.

In step S3, when there are multiple WLAN APs connected simultaneously, data between different WLAN APs is isolated.

When a plurality of WLAN APs are connected simultaneously, data between different WLAN APs are isolated, which specifically includes:

setting Virtual Local Area Network (VLAN), wherein the ID number of each VLAN corresponds to the BSSID of the WLAN AP and the MAC address of a target terminal;

and establishing a routing table by using the MAC address of the destination terminal, and carrying out isolation management on data corresponding to the MAC addresses of different terminals in the routing table so as to ensure that WLAN APs with different BSSIDs carry out virtual connection through different VLAN ID numbers.

Wherein, step S2 specifically includes:

and adding the DRB ID to the head of the message of the PDCP PDU to obtain the message of the LWA PDU.

After adding an LWA specific ethernet type and an ethernet header to a transport layer, encapsulating according to an 802.1Q format, and determining a corresponding WLAN AP according to an MAC address of the destination terminal, so that a packet of the LWAPDU is forwarded to the WLAN AP through the transport layer, where the LWA specific ethernet type corresponds to a packet format of an LWA PDU, specifically 0x9E 65.

After step S3, the method further includes:

and activating the LWA function of the target terminal based on the signal strength of the WLAN AP after the message of the LWA PDU is forwarded to the WLAN AP through the transmission layer.

After the packet of the LWA PDU is forwarded to the WLAN AP through the transmission layer, the LWA function of the target terminal is activated based on the signal strength of the WLAN AP, which specifically includes:

measuring the signal strength of all WLAN APs in real time;

if the signal strength of one of the WLAN APs is higher than a preset threshold value, the target terminal is accessed into the WLAN through the one WLAN AP so as to activate the LWA function of the target terminal;

and if the signal strength of one WLAN AP is measured to be lower than a preset threshold value after activation, deactivating the LWA function of the target terminal.

According to a second aspect of the present invention, there is provided an LWA deployment system comprising:

the increasing module is used for increasing the LWA AP below a packet data convergence protocol PDCP layer of the base station;

an identification module is added, configured to add a data radio bearer identification DRB ID to a packet data convergence protocol data unit PDCP PDU message generated by the LWA AP, so as to obtain a packet of the LWA PDU;

the switching module is used for adding an LWA specific Ethernet type in a transmission layer so as to enable the message of the LWA PDU to be forwarded to a WLAN AP through the transmission layer.

According to a third aspect of the present invention, there is provided a computer program product comprising program code for performing an LWA deployment method as described above.

According to a fourth aspect of the invention, there is provided a non-transitory computer readable storage medium storing the computer program as described above.

According to the LWA deployment method and the LWA deployment system, the WT function is integrated into the LTE base station, so that WT and Xw interfaces are omitted in the LWA deployment, and the current network reconstruction cost and the engineering quantity are greatly reduced.

Drawings

Fig. 1 is a flowchart of an LWA deployment method according to an embodiment of the present invention;

fig. 2 is a schematic deployment diagram of a base station LWA provided in an embodiment of the present invention;

fig. 3 is a schematic diagram of a format of an LWA PDU message between a base station and a WLAN AP according to an embodiment of the present invention;

fig. 4 is a structural diagram of an LWA deployment system according to an embodiment of the present invention.

Detailed Description

The following detailed description of embodiments of the present invention is provided in connection with the accompanying drawings and examples. The following examples are intended to illustrate the invention but are not intended to limit the scope of the invention.

Fig. 1 is a flowchart of an LWA deployment method provided in an embodiment of the present invention, and as shown in fig. 1, the method includes:

s2, adding a data radio bearer identification (DRB ID) in a packet data convergence protocol data unit (PDCP PDU) message generated by the LWA AP to obtain the LWA PDU message;

The LWA is used for aggregating the LTE and the WIFI and simultaneously serving users, can freely shunt data service bearers of the LTE, can transmit one or more bearers through the WIFI, and transmits the rest bearers through the LTE. Through the distribution of WIFI, the bearing capacity of LTE is greatly improved, so that the LWA method is necessary for mobile communication.

In the prior art, LWA deployment generally adopts a method of introducing a new network element to implement an Xw interface and then upgrading a WLAN AP to perform LWA deployment, and this deployment method may cause a change in a network architecture and also result in a large amount of engineering for modifying an existing network.

In view of the above problems in the prior art, embodiments of the present invention provide an LWA deployment method, in which a WT function is directly integrated in a base station, so that WT and Xw interfaces are omitted in an LWA deployment process, and existing network modification cost and engineering volume are greatly reduced.

Fig. 2 is a schematic deployment diagram of a base station LWA according to an embodiment of the present invention, and as shown in fig. 2, in the embodiment of the present invention, an LWA AP module is substantially added in a PDCP lower layer of the base station, the base station is connected to a WLAN through a switch, and the base station is connected to the switch through a TRS interface.

Specifically, in S2, the packet data convergence protocol PDCP is an abbreviation for packet data convergence protocol. It is a radio transport protocol stack in mobile communication systems that is responsible for compressing and decompressing IP headers, transmitting user data and maintaining sequence numbers of radio bearers set for lossless radio network service subsystems (SRNS).

Then, a data radio bearer identification DRB ID is added to the packet data convergence protocol data unit PDCP PDU message, that is, the data is used for radio bearer, and the message is sent to the WLAN, so that the WLAN can allocate corresponding radio resource bearer data.

In the embodiment of the present invention, the above process is completed in the base station, and in the embodiment of the present invention, a thin layer entity module of the LWA AP is newly added below a PDCP layer of the base station, and the thin layer entity module is used for simulating the function of the original WT, so as to implement LWA deployment.

Furthermore, the thin-layer entity module of the LWA AP is arranged, the WT function can be realized, and a TRS interface is adopted for connection in the connection process with the WLAN, so that the LWA function can be realized only by adding a network cable from a base station to the WIFI, and the large-scale reconstruction of the existing WIFI network is avoided no matter which manufacturer has the WIFI.

In S3, the LWA Specific ethernet Type (LWA Specific ethernet Type) is a corresponding ethernet Type value set according to the LWA mode in the embodiment of the present invention, and in the embodiment of the present invention, the LWA Specific ethernet Type is set to 0x9E 65.

Specifically, after the DRB ID is added to the LWA AP, the LWA Specific Ether Type and the ethernet header are added to the transport layer and then forwarded to the corresponding WLAN AP according to the target MAC address, thereby implementing management of the WLAN AP node.

On the basis of the foregoing embodiment, step S2 specifically includes:

Step S3 specifically includes:

after adding an LWA specific ethernet type and an ethernet header to a transport layer, encapsulating according to an 802.1Q format, and determining a corresponding WLAN AP according to the MAC address of the destination terminal, so that a packet of the LWA PDU is forwarded to the WLAN AP through the transport layer, where the LWA specific ethernet type corresponds to a packet format of the LWA PDU, specifically 0x9E 65.

Fig. 3 is a schematic diagram of a LWA PDU message format between a base station and a WLAN AP according to an embodiment of the present invention, as shown in fig. 3, in the embodiment of the present invention, a DRB ID is set to 0x04 and is located at a header of message data, 0x04 is a data bearer flag, there may be multiple IDs for a certain user data bearer, and 0x04 is only a specific example given by the embodiment of the present invention, and the present invention is not limited to this.

The LWA Specific Ether Type is set to be 0x9E65, and the port of the base station can be connected with the WLAN AP through the LWA PDU message format provided by the embodiment of the invention.

The embodiment of the invention names the new message data as LWA PDU by adding DRB ID information in the message data of PDCP PDU, so that the encapsulated new message data has LWA information.

Specifically, the embodiment of the present invention adds the DRB ID to a header of packet data of the PDCP PDU, where the header is a protocol stack header.

On the basis of the above embodiment, in step S3, when there are multiple WLAN APs connected simultaneously, data between different WLAN APs is isolated.

It is understood that since the interface of the base station is limited, it may be necessary to connect to multiple WLAN APs, and in order to avoid a broadcast storm of downlink data, it is necessary to isolate data between different WLAN APs.

Specifically, when a plurality of WLAN APs are connected simultaneously, the method for isolating data between different WLAN APs specifically includes:

In the embodiment of the present invention, the method for data isolation may adopt a VLAN and pseudo wire manner, wherein the VLAN manner is:

setting VLAN in a base station, and maintaining a target terminal address routing table through base station software, wherein each routing table records the MAC address of a target terminal, BSSID of WLAN AP and ID number of the VLAN respectively.

Then, the corresponding relationship between the data corresponding to the destination terminal and the BSSID of the WLAN AP is established through the routing table, and the data transmitted by the WLAN APs with different BSSIDs can be separated through the routing table, thereby avoiding the broadcast storm of the downlink data.

On the basis of the foregoing embodiment, after step S3, the method further includes:

It will be appreciated that after the LWA is deployed, it is necessary to activate its LWA functionality for the user connected to the base station.

The LWA activation process provided by the embodiment of the invention comprises the following steps: and accessing the terminal UE into the LTE network, acquiring the information of the WLAN, and finally accessing the UE into the WLAN through the LWA function deployed by the base station.

Specifically, after the packet of the LWA PDU is forwarded to the WLAN AP through the transmission layer, the activating the LWA function of the target terminal based on the signal strength of the WLAN AP includes:

measuring the signal strength of all WLAN APs in real time;

It should be noted that the UE to be accessed needs to support the LWA function, and if not, the above scheme cannot be implemented.

Specifically, the embodiment of the present invention measures the signal strength of the WLAN APs in real time, and if the signal strength of one of the WLAN APs is higher than a preset threshold, the UE can connect to the WLAN through the WLAN AP to implement the LWA function, and at this time, it is determined that the LWA activation of the UE is successful.

After the LWA of the UE is activated, the UE needs to continue to measure the signal strength of the WLAN AP, periodically report the measurement result to the base station, and deactivate the LWA of the UE if the signal strength of the WLAN AP in the measurement result is lower than a preset value, that is, terminate the LWA function.

Fig. 4 is a structural diagram of an LWA deployment system according to an embodiment of the present invention, and as shown in fig. 4, an LWA deployment system includes: adding an LWA AP module at a PDCP lower layer of a base station, wherein the LWA AP module comprises: increase module 1, add sign module 2 and switching module 3, wherein:

the adding module 1 is used for adding LWA AP below a packet data convergence protocol PDCP layer of a base station;

the adding identification module 2 is used for adding a data radio bearer identification DRB ID in a packet data convergence protocol data unit PDCP PDU message generated by the LWA AP so as to obtain the LWA PDU message;

the transit module 3 is configured to add an LWA-specific ethernet type to a transport layer, so that a packet of the LWA PDU is forwarded to a WLAN AP through the transport layer.

The specific LWA deployment method of the present invention has been specifically described in the above embodiments, and the embodiments of the present invention are not described herein again.

An embodiment of the present invention provides an LWA deployment system, including: at least one processor; and at least one memory communicatively coupled to the processor, wherein:

the memory stores program instructions executable by the processor, the processor calls the program instructions to perform the methods provided by the method embodiments, for example, including: s1, increasing LWA AP below a packet data convergence protocol PDCP layer of the base station; s2, adding a data radio bearer identification (DRB ID) in a packet data convergence protocol data unit (PDCP PDU) message generated by the LWA AP to obtain the LWA PDU message; s3, adding LWA specific Ethernet type in the transmission layer, so that the message of the LWA PDU is forwarded to the WLAN AP through the transmission layer.

The present embodiment discloses a computer program product comprising a computer program stored on a non-transitory computer readable storage medium, the computer program comprising program instructions which, when executed by a computer, enable the computer to perform the method provided by the above-mentioned method embodiments, for example, comprising: s1, increasing LWA AP below a packet data convergence protocol PDCP layer of the base station; s2, adding a data radio bearer identification (DRB ID) in a packet data convergence protocol data unit (PDCP PDU) message generated by the LWA AP to obtain the LWA PDU message; s3, adding LWA specific Ethernet type in the transmission layer, so that the message of the LWA PDU is forwarded to the WLAN AP through the transmission layer.

The present embodiments provide a non-transitory computer-readable storage medium storing computer instructions that cause the computer to perform the methods provided by the above method embodiments, for example, including: s1, increasing LWA AP below a packet data convergence protocol PDCP layer of the base station; s2, adding a data radio bearer identification (DRB ID) in a packet data convergence protocol data unit (PDCP PDU) message generated by the LWA AP to obtain the LWA PDU message; s3, adding LWA specific Ethernet type in the transmission layer, so that the message of the LWA PDU is forwarded to the WLAN AP through the transmission layer.

Those of ordinary skill in the art will understand that: all or part of the steps for implementing the method embodiments may be implemented by hardware related to program instructions, and the program may be stored in a computer readable storage medium, and when executed, the program performs the steps including the method embodiments; and the aforementioned storage medium includes: various media that can store program codes, such as ROM, RAM, magnetic or optical disks.

Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.

Finally, the method of the present application is only a preferred embodiment and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. An LWA deployment method, comprising:

s3, adding LWA specific Ethernet type in a transmission layer to make the message of the LWA PDU forwarded to a WLAN AP through the transmission layer;

in step S3, when there are multiple WLAN APs connected simultaneously, isolating data between different WLAN APs specifically includes:

2. The method according to claim 1, wherein step S2 specifically comprises:

3. The method according to claim 2, wherein step S3 specifically includes:

4. The method according to claim 1, wherein after step S3, the method further comprises:

5. The method according to claim 4, wherein the activating the LWA function of the target terminal based on the signal strength of the WLAN AP after the packet of the LWA PDU is forwarded to the WLAN AP through the transport layer comprises:

measuring the signal strength of all WLAN APs in real time;

6. An LWA deployment system, comprising:

an identification module is added, configured to add a data radio bearer identification DRB ID to a packet data convergence protocol data unit PDCP PDU message generated by the LWA AP, so as to obtain an LWAPDU message;

the switching module is used for adding an LWA specific Ethernet type in a transmission layer so as to enable the message of the LWAPDU to be forwarded to a WLAN AP through the transmission layer; when a plurality of WLAN APs are connected simultaneously, isolating data between different WLAN APs specifically includes:

7. A computer program product, characterized in that the computer program product comprises a computer program stored on a non-transitory computer-readable storage medium, the computer program comprising program instructions which, when executed by a computer, cause the computer to carry out the method according to any one of claims 1 to 5.

8. A non-transitory computer-readable storage medium storing computer instructions that cause a computer to perform the method of any one of claims 1 to 5.