WO2016187872A1

WO2016187872A1 - Data transmission method and apparatus, and switching device

Info

Publication number: WO2016187872A1
Application number: PCT/CN2015/080056
Authority: WO
Inventors: 王少瑞
Original assignee: 华为技术有限公司
Priority date: 2015-05-28
Filing date: 2015-05-28
Publication date: 2016-12-01
Also published as: CN107535015B; CN107535015A

Abstract

The embodiments of the present invention relate to a data transmission method and apparatus and a switching device. The method comprises: a CPRI switching device receives an uplink MAC frame sent by a wireless backhaul device, wherein the wireless backhaul device obtains the uplink MAC frame by converting an uplink wireless MAC frame sent by a second BTS after receiving same; and the CPRI switching device bears the uplink MAC frame on a CPRI and sends the borne uplink MAC frame to a first BTS for the first BTS to forward the uplink MAC frame to a transmission network. The data transmission method and apparatus, and the switching device provided in the embodiments of the present invention reduce the difficulty of wiring in an indoor coverage scenario.

Description

Data transmission method, device and switching device

Technical field

Embodiments of the present invention relate to communication technologies, and in particular, to a data transmission method, apparatus, and switching device.

Background technique

In mobile networks, indoor coverage has always been a difficult coverage area for network operators. With the continuous development of data services, indoor data services are more concentrated. Therefore, the demand for good indoor coverage is becoming more and more urgent.

In the prior art, the PPORU AxC data is transmitted by interconnecting a pico radio remote unit (pRRU) with a common public radio interface (CPRI) switching device. Then, the CPRI switching device is interconnected with the baseband unit (BBU) through the CPRI to transmit the AxC data of the pRRU to the BBU. The CPRI switching device needs to complete the radio frequency combining of multiple pRRU AxCs.

However, in the prior art, since all pRRUs need to be connected to the nearest CPRI switching device through an Ethernet cable, and the Ethernet cable adopts the CPRI protocol, it is necessary to pass through the wall when solving the indoor coverage problem by using the prior art solution. The operation of re-arranging the network cable, such as punching, makes wiring difficult.

Summary of the invention

The embodiment of the invention provides a data transmission method, device and switching device, which reduces the difficulty of wiring in an indoor coverage scenario.

In a first aspect, an embodiment of the present invention provides a data transmission method, which is applied to a base station system, where the system includes a wireless backhaul device, a CPRI switching device, and a first base transceiver station BTS and at least one second BTS. The second BTS accesses the wireless backhaul device by means of a wireless connection, the wireless backhaul device is connected to the CPRI switching device, and the CPRI switching device and the first BTS have a common public radio interface CPRI, and the method includes :

Receiving, by the CPRI switching device, an uplink medium access control MAC frame sent by the wireless backhaul device, where the uplink MAC frame is converted by the wireless backhaul device after receiving the uplink wireless MAC frame sent by the second BTS owned;

The CPRI switching device carries the uplink MAC frame on the CPRI, and sends the carried uplink MAC frame to the first BTS, so that the first BTS forwards the uplink MAC frame. To the transmission network.

With reference to the first aspect, in a first possible implementation manner of the first aspect, the CPRI switching device carries the uplink MAC frame on the CPRI, and sends the carried uplink MAC frame to the The first BTS, including:

The CPRI switching device acquires a CPRI time slot; the CPRI time slot is used to carry the uplink MAC frame;

The CPRI switching device sends the uplink MAC frame to the first BTS according to the CPRI slot.

In a second aspect, an embodiment of the present invention provides a data transmission method, which is applied to a base station system, where the system includes a wireless backhaul device, a CPRI switching device, and a first base transceiver station BTS and at least one second BTS. The second BTS accesses the wireless backhaul device by means of a wireless connection, the wireless backhaul device is connected to the CPRI switching device, and the CPRI switching device and the first BTS have a common public radio interface CPRI, and the method includes :

Receiving, by the CPRI switching device, a downlink MAC frame sent by the first BTS; the downlink MAC frame is carried on the CPRI; and the downlink MAC frame carries an IP address of the second BTS;

Determining, by the CPRI switching device, a port that forwards the downlink MAC frame according to the IP address;

Transmitting, by the CPRI switching device, the downlink MAC frame to the wireless backhaul device according to the determined port, where the wireless backhaul device converts the downlink MAC frame into a wireless downlink MAC frame, and sends the downlink MAC frame to the wireless downlink transmission frame. Said second BTS.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the receiving, by the CPRI switching device, the downlink MAC frame sent by the first BTS includes:

The CPRI switching device receives a downlink MAC frame sent by the first BTS according to the CPRI time slot.

In a third aspect, an embodiment of the present invention provides a data transmission apparatus, including:

a receiving module, configured to receive an uplink medium access control MAC frame sent by the wireless backhaul device, where the uplink MAC frame is converted by the wireless backhaul device after receiving the uplink wireless MAC frame sent by the second BTS owned;

a processing module, configured to carry the uplink MAC frame on the CPRI;

And a sending module, configured to send the uplink MAC frame that is carried to the first BTS, where the first BTS forwards the uplink MAC frame to the transport network.

In conjunction with the third aspect, in a first possible implementation manner of the third aspect, the sending module includes:

An acquiring unit, configured to acquire a CPRI time slot, where the CPRI time slot is used to carry the uplink MAC frame;

And a sending unit, configured to send the uplink MAC frame to the first BTS according to the CPRI time slot.

In a fourth aspect, an embodiment of the present invention provides a data transmission apparatus, including:

a receiving module, configured to receive a downlink MAC frame sent by the first BTS; the downlink MAC frame is carried on the CPRI; and the downlink MAC frame carries an IP address of the second BTS;

a determining module, configured to determine, according to the IP address, a port that forwards the downlink MAC frame;

a sending module, configured to send the downlink MAC frame to the wireless backhaul device according to the determined port, where the wireless backhaul device converts the downlink MAC frame into a wireless downlink MAC frame, and sends the downlink MAC frame to the wireless downlink device Said second BTS.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the receiving module includes:

An acquiring module, configured to acquire a CPRI time slot, where the CPRI time slot is used to carry the uplink MAC frame;

And a receiving unit, configured to receive, according to the CPRI time slot, a downlink MAC frame sent by the first BTS.

In a fifth aspect, an embodiment of the present invention provides a CPRI switching device, including:

a receiver, configured to receive an uplink medium access control MAC frame sent by the wireless backhaul device, where the uplink MAC frame is converted by the wireless backhaul device after receiving the uplink wireless MAC frame sent by the second BTS owned;

a processor, configured to carry the uplink MAC frame on the CPRI;

And a transmitter, configured to send the carried uplink MAC frame to the first BTS, where the first BTS forwards the uplink MAC frame to a transport network.

With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, the receiver is further configured to acquire a CPRI time slot, where the CPRI time slot is used to carry the uplink MAC frame.

The transmitter is further configured to send the uplink MAC frame to the first BTS according to the CPRI time slot.

In a sixth aspect, an embodiment of the present invention provides a CPRI switching device, including:

a receiver, configured to receive a downlink MAC frame sent by the first BTS; the downlink MAC frame is carried on the CPRI; and the downlink MAC frame carries an IP address of the second BTS;

a processor, configured to determine, according to the IP address, a port that forwards the downlink MAC frame;

a transmitter, configured to send the downlink MAC frame to the wireless backhaul device according to the determined port, where the wireless backhaul device converts the downlink MAC frame into a wireless downlink MAC frame, and sends the downlink MAC frame to the wireless downlink device Said second BTS.

With reference to the sixth aspect, in a first possible implementation manner of the sixth aspect, the receiver is further configured to acquire a CPRI time slot, where the CPRI time slot is used to carry the uplink MAC frame.

The receiver is further configured to receive, according to the CPRI time slot, a downlink MAC frame sent by the first BTS.

The data transmission method, device, and switching device provided by the embodiment of the present invention, the CPRI switching device receives an uplink MAC frame sent by the wireless backhaul device, where the uplink MAC frame is an uplink wireless MAC frame sent by the wireless backhaul device to receive the second BTS. After the conversion is performed, the CPRI switching device carries the uplink MAC frame on the CPRI, and sends the carried uplink MAC frame to the first BTS, so that the first BTS sends the uplink MAC frame to the transmission network. The second BTS sends the uplink MAC frame to the wireless backhaul device in a wireless manner, so that the wireless backhaul device forwards the uplink MAC to the CPRI switching device through the Ethernet, so that the location where the cable is difficult to deploy can be placed. The second BTS solves the problem of wiring difficulties, thereby reducing the complexity of the wiring.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description are only It is a certain embodiment of the present invention, and other drawings can be obtained from those skilled in the art without any creative work.

1 is a schematic diagram of a system architecture of a data transmission method in the prior art;

2 is a schematic diagram of a system architecture of a data transmission method according to the present invention;

3 is a schematic flowchart of Embodiment 1 of a data transmission method according to the present invention;

4 is a schematic flowchart of Embodiment 2 of a data transmission method according to the present invention;

FIG. 5 is a schematic flowchart of Embodiment 3 of a data transmission method according to the present invention;

FIG. 6 is a schematic flowchart diagram of Embodiment 4 of a data transmission method according to the present invention;

7 is a schematic flowchart of Embodiment 5 of a data transmission method according to the present invention;

8 is a schematic flowchart of Embodiment 6 of a data transmission method according to the present invention;

FIG. 9 is a schematic structural diagram of Embodiment 1 of a data transmission apparatus according to the present invention; FIG.

10 is a schematic structural diagram of Embodiment 2 of a data transmission apparatus according to the present invention;

11 is a schematic structural diagram of Embodiment 3 of a data transmission apparatus according to the present invention;

12 is a schematic structural diagram of Embodiment 4 of a data transmission apparatus according to the present invention;

13 is a schematic structural diagram of Embodiment 1 of a CPRI switching device according to the present invention;

FIG. 14 is a schematic structural diagram of Embodiment 2 of a CPRI switching device according to the present invention.

detailed description

The technical solutions in the embodiments of the present invention are clearly and completely described in the following with reference to the accompanying drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, but not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

FIG. 1 is a schematic diagram of a system architecture of a data transmission method in the prior art. As shown in FIG. 1 , the existing base station network architecture mainly includes: a base transceiver transceiver station (Base Transceiver Station; BTS for short), a CPRI switching device, and a pRRU, where the BTS performs data with the CPRI switching device through the CPRI interface. For transmission, the CPRI switching device performs data transmission with the pRRU through the Ethernet CPRI interface. In an existing base station system, all pRRUs need to be connected through an Ethernet cable. On the near CPRI switching device, the Ethernet line physically uses the CAT5 network cable, and the CPRI protocol is adopted in the protocol. Since the CPRI protocol cannot be directly carried on the Ethernet, the existing Ethernet network in the building cannot be reused in the prior art. Instead, wiring needs to be re-routed, making wiring difficult.

In order to overcome the above problems, the present invention modifies the networking architecture of the base station, as shown in FIG. 2, FIG. 2 is a schematic diagram of a system architecture of the data transmission method according to the present invention, and the system shown in FIG. 2 includes a first BTS, CPRI exchange. The device, the wireless backhaul device, the at least one second BTS, and the pRRU, wherein the first BTS communicates with the CPRI switching device through the CPRI interface, and the wireless backhaul device can use the Ethernet CPRI network cable in the existing system and the CPRI switching device. Communication, which can also communicate with the CPRI switching device by using an existing Ethernet cable in the room, wherein the wireless backhaul device provides wireless backhaul for the second BTS through the unlicensed spectrum or the licensed spectrum, and the wireless backhaul can be in-band. Or out of band. For the manner of communication between the wireless backhaul device and the CPRI switching device, the embodiment is not particularly limited herein. Based on the base station networking architecture of the embodiment, the wireless backhaul device can be deployed in a location where the cable is easy to deploy, and the location where the cable is difficult to deploy can be solved by placing a second BTS, where the second BTS is backhaul through the wireless. Access to the wireless backhaul device. In addition, for the easy-to-route, the existing deployment mode can be used to connect the pRRU to the CPRI switching device through the Ethernet CPRI to achieve maximum compatibility with the existing base station networking.

In addition, it should be noted that the first BTS may aggregate data sent by the at least one second BTS through the wireless backhaul device and the CPRI switching device, and uniformly send the aggregated data to the transmission network.

FIG. 3 is a schematic flowchart diagram of Embodiment 1 of a data transmission method according to the present invention. The embodiment of the invention provides a data transmission method, which can be performed by any device that performs a data transmission method, and the device can be implemented by software and/or hardware. In this embodiment, the device can be integrated in the CPRI switching device.

On the basis of the system architecture shown in FIG. 2, as shown in FIG. 3, the method in this embodiment may include:

Step 301: The CPRI switching device receives an uplink MAC frame sent by the wireless backhaul device, where the uplink MAC frame is converted by the wireless backhaul device after receiving the uplink wireless MAC frame sent by the second BTS.

In this embodiment, the CPRI switching device may be, for example, a switch or a router, etc., second. The BTS wirelessly transmits a medium access control (MAC) frame to the wireless backhaul device, so that the wireless backhaul device converts the received wireless uplink MAC frame to obtain an uplink MAC frame. It can be seen that, in a location where indoor wiring is difficult, the second BTS can be arranged to enable the second BTS to communicate with the wireless backhaul device wirelessly, which not only reduces the system cost, but also reduces the difficulty of wiring.

After the wireless backhaul device converts the wireless uplink MAC frame, the wireless backhaul device completes the function of the Layer 2 wireless switch to forward the uplink MAC frame of the second BTS to the CPRI switching device through the Ethernet. In a specific implementation process, after receiving the uplink MAC frame, the wireless backhaul device needs to read the source MAC address in the uplink MAC frame, and then read the destination MAC address in the uplink MAC frame, and then perform the wireless backhaul. The port corresponding to the destination MAC address is searched in the address table pre-stored in the device, so that the uplink MAC frame is directly copied to the port corresponding to the destination MAC address, and the uplink MAC frame is sent from the port.

Step 302: The CPRI switching device carries the uplink MAC frame on the CPRI, and sends the carried uplink MAC frame to the first BTS, so that the first BTS forwards the uplink MAC frame to the transmission network.

In this embodiment, a CPRI interface exists between the CPRI switching device and the first BTS. After receiving the uplink MAC frame sent by the wireless backhaul device, the CPRI switching device carries the uplink MAC frame on the CPRI, and then carries the uplink MAC frame. The uplink MAC frame on the CPRI is forwarded to the first BTS, and then the first BTS forwards the uplink MAC frame to the transmission network to complete uplink transmission of data.

According to the data transmission method provided by the embodiment of the present invention, the CPRI switching device receives the uplink MAC frame sent by the wireless backhaul device, and the uplink MAC frame is converted by the wireless backhaul device after receiving the uplink wireless MAC frame sent by the second BTS. The CPRI switching device carries the uplink MAC frame on the CPRI, and sends the carried uplink MAC frame to the first BTS, so that the first BTS sends the uplink MAC frame to the transmission network. The second BTS sends the uplink MAC frame to the wireless backhaul device in a wireless manner, so that the wireless backhaul device forwards the uplink MAC to the CPRI switching device through the Ethernet, so that the location where the cable is difficult to deploy can be placed. The second BTS solves the problem of wiring difficulties, thereby reducing the complexity of the wiring.

4 is a schematic flowchart of a second embodiment of a data transmission method according to the present invention. On the basis of the first embodiment of the data transmission method, the CPRI switching device carries an uplink MAC frame on the CPRI and carries the uplink MAC frame after the bearer. The embodiment sent to the first BTS will be described in detail. Above On the basis of the system architecture shown in FIG. 2, as shown in FIG. 4, the method in this embodiment may include:

Step 401: The CPRI switching device receives an uplink MAC frame sent by the wireless backhaul device, where the uplink MAC frame is converted by the wireless backhaul device after receiving the uplink wireless MAC frame sent by the second BTS.

Step 401 is similar to step 301, and details are not described herein again.

Step 402: The CPRI switching device acquires a CPRI time slot, where the CPRI time slot is used to carry an uplink MAC frame.

In this embodiment, on the CPRI channel between the CPRI switching device and the first BTS, a CPRI time slot needs to be allocated in advance, and the CPRI time slot is called an antenna carrier container, and the uplink MAC frame is carried in the antenna carrier container. The size of the antenna carrier container needs to be planned and set according to the actual situation. In a specific implementation process, the size of the antenna carrier container can be planned according to the traffic of the uplink MAC frame, and the specific value of the size of the antenna carrier container. The embodiment of the invention is not particularly limited herein.

Step 403: The CPRI switching device sends the uplink MAC frame to the first BTS according to the CPRI time slot.

In this embodiment, the CPRI switching device sends the received uplink MAC frame to the first BTS according to the acquired CPRI time slot, so that the first BTS extracts the uplink MAC frame, and sends the uplink MAC frame to the transmission. The network, at this point, can complete the transmission of the uplink MAC frame.

5 is a schematic flowchart of a third embodiment of a data transmission method according to the present invention. In this embodiment, based on the first embodiment of the data transmission method or the second embodiment of the data transmission method, the pRRU sends an uplink data packet to the first BTS through the Ethernet CPRI. The embodiment will be described in detail. On the basis of the system architecture shown in FIG. 2, as shown in FIG. 5, the method in this embodiment may include:

Step 501: The CPRI switching device receives an uplink data packet sent by the pRRU through the Ethernet CPRI.

In this embodiment, with continued reference to FIG. 1, the pRRU can be connected to the CPRI switching device through the Ethernet CPRI in a place where the indoor is easy to be wired. Therefore, when performing uplink data transmission, the pRRU can uplink the data packet through the Ethernet CPRI. Send directly to the CPRI switching device.

Step 502: The CPRI switching device sends the uplink data packet to the first BTS through the CPRI, so that the first BTS sends the uplink data packet to the transmission network.

In this embodiment, after receiving the uplink data packet sent by the pRRU, the CPRI switching device sends the received uplink data packet to the first BTS through the CPRI, and the first BTS sends the uplink data packet to the transmission network again. The transmission of the upstream data packet can be completed.

The embodiment of the present invention provides a data transmission method. The CPRI switching device receives an uplink data packet sent by the pRRU through the Ethernet CPRI, and the CPRI switching device sends the uplink data packet to the first BTS through the CPRI, so that the first BTS sends the uplink data packet. Sending to the transmission network, since the pRRU can be deployed in the position of easy wiring, and the uplink data packet is sent to the transmission network through the CPRI switching device and the first BTS, the networking structure of the existing base station can be maximized.

FIG. 6 is a schematic flowchart diagram of Embodiment 4 of a data transmission method according to the present invention. The embodiment of the invention provides a data transmission method, which can be performed by any device that performs a data transmission method, and the device can be implemented by software and/or hardware. In this embodiment, the device can be integrated in the CPRI switching device.

On the basis of the system architecture shown in FIG. 2, as shown in FIG. 6, the method in this embodiment may include:

Step 601: The CPRI switching device receives the downlink MAC frame sent by the first BTS; the downlink MAC frame is carried on the CPRI; and the downlink MAC frame carries the IP address of the second BTS.

In this embodiment, the first BTS receives the downlink MAC frame that is sent from the transport network, where the destination IP address carried in the downlink MAC frame is the IP address of the second BTS, that is, the first BTS needs to be received. Which second BTS the downlink MAC frame is sent to. To this end, after receiving the downlink MAC frame, the first BTS first carries the downlink MAC frame on the CPRI, and then sends the downlink MAC frame carried on the CPRI to the CPRI switching device, and the CPRI switching device performs the downlink MAC frame. Forward.

Step 602: The CPRI switching device determines, according to the IP address, a port that forwards the downlink MAC frame.

In this embodiment, after receiving the downlink MAC frame sent by the first BTS, the CPRI switching device reads the destination IP address carried in the downlink MAC frame, and searches the address table for the port corresponding to the destination IP address, When the downlink MAC frame is sent from the port, the downlink MAC frame can be sent to the second BTS corresponding to the carried IP address.

Step 603: The CPRI switching device sends the downlink MAC frame to the wireless backhaul device according to the determined port, so that the wireless backhaul device converts the downlink MAC frame into a wireless downlink MAC frame, and then sends the downlink MAC frame to the second BTS.

In this embodiment, after determining that the port of the downlink MAC frame is sent, the CPRI switching device copies the downlink MAC frame to the port, and sends the downlink MAC frame from the port to the wireless backhaul device. After the wireless backhaul device extracts the downlink MAC frame from the wireless backhaul channel, the downlink MAC frame is converted into a wireless downlink MAC frame, and the destination IP address carried in the downlink MAC frame is read, and the address table is searched for The port corresponding to the destination IP address sends the converted wireless downlink MAC frame to the second BTS, so that the second BTS continues to process the wireless downlink MAC frame.

According to the data transmission method provided by the embodiment of the present invention, the CPRI switching device receives the downlink MAC frame sent by the first BTS, and sends the downlink MAC frame to the wireless backhaul device, so that the wireless backhaul device converts the downlink MAC frame into the wireless downlink. After the MAC frame, it is sent to the second BTS. After the CPRI switching device sends the downlink MAC frame to the wireless backhaul device, so that the wireless backhaul device wirelessly transmits the downlink MAC frame to the second BTS, the second BTS can be placed at a location where the cable is difficult to deploy. To solve the problem of wiring difficulties, the wiring complexity can be reduced.

FIG. 7 is a schematic flowchart of Embodiment 5 of a data transmission method according to the present invention. In this embodiment, a CPRI switching device receives an embodiment of a downlink MAC frame sent by a first BTS according to Embodiment 4 of the data transmission method, and is described in detail. On the basis of the system architecture shown in FIG. 6, as shown in FIG. 7, the method in this embodiment may include:

Step 701: The CPRI switching device acquires a CPRI time slot, and the CPRI time slot is used to carry an uplink MAC frame.

In this embodiment, on the CPRI channel between the CPRI switching device and the first BTS, a CPRI time slot needs to be allocated in advance, and the CPRI time slot is called an antenna carrier container, and the downlink MAC frame is carried in the antenna carrier container. The size of the antenna carrier container needs to be planned and set according to the actual situation. In a specific implementation process, the size of the antenna carrier container can be planned according to the traffic of the downlink MAC frame, and the specific value of the size of the antenna carrier container. Embodiments of the invention This is not particularly limited.

Step 702: The CPRI switching device receives the downlink MAC frame sent by the first BTS according to the CPRI time slot.

In this embodiment, the CPRI switching device receives the downlink MAC frame sent by the first BTS according to the acquired CPRI time slot, and sends the downlink MAC frame to the wireless backhaul device.

Step 703: The CPRI switching device determines, according to the IP address, a port that forwards the downlink MAC frame.

Step 704: The CPRI switching device sends the downlink MAC frame to the wireless backhaul device according to the determined port, so that the wireless backhaul device converts the downlink MAC frame into a wireless downlink MAC frame, and then sends the downlink MAC frame to the second BTS.

Step 703-step 704 is similar to step 602-step 603, and details are not described herein again.

FIG. 8 is a schematic flowchart of Embodiment 6 of a data transmission method according to the present invention. In this embodiment, an embodiment of transmitting a downlink data packet to a first BTS to a pRRU is described in detail on the basis of the foregoing embodiments. On the basis of the system architecture shown in FIG. 2, as shown in FIG. 8, the method in this embodiment may include:

Step 801: The CPRI switching device receives the downlink data packet sent by the first BTS.

Step 802: The CPRI switching device sends the downlink data packet to the pRRU through the Ethernet CPRI, so that the pRRU processes the downlink data packet.

In this embodiment, with reference to FIG. 1, in the place where the indoor is easy to be wired, the pRRU can be connected to the CPRI switching device through the Ethernet CPRI, and the CPRI switching device is connected to the first BTS through the CPRI, so that downlink data transmission is performed. The first BTS may carry the downlink data packet on the CPRI, and send the downlink data packet after the bearer to the CPRI switching device. After receiving the downlink data packet, the CPRI switching device sends the downlink data packet to the downlink data packet through the Ethernet CPRI. pRRU, so that the pRRU processes the downstream data packet.

An embodiment of the present invention provides a data transmission method, where a CPRI switching device receives a first BTS transmission. The downlink data packet sent by the CPRI switching device sends the downlink data packet to the pRRU through the Ethernet CPRI, so that the pRRU can process the downlink data packet, and the pRRU can be deployed in the position where the wiring is easy, and the CPRI switching device and the first The BTS sends the downlink data packets sent by the transport network to the pRRU, thereby maximizing compatibility with the existing base station networking architecture.

FIG. 9 is a schematic structural diagram of Embodiment 1 of a data transmission apparatus according to the present invention. As shown in FIG. 9, the data transmission apparatus provided by the embodiment of the present invention includes a receiving module 11, a processing module 12, and a sending module 13.

The receiving module 11 is configured to receive an uplink medium access control MAC frame sent by the wireless backhaul device, where the uplink MAC frame is after the wireless backhaul device receives the uplink wireless MAC frame sent by the second BTS. The processing module 12 is configured to carry the uplink MAC frame on the CPRI, and the sending module 13 is configured to send the carried uplink MAC frame to the first BTS, where A BTS forwards the uplink MAC frame to the transport network.

According to the data transmission device provided by the embodiment of the present invention, the CPRI switching device receives the uplink MAC frame sent by the wireless backhaul device, and the uplink MAC frame is converted by the wireless backhaul device after receiving the uplink wireless MAC frame sent by the second BTS. The CPRI switching device carries the uplink MAC frame on the CPRI, and sends the carried uplink MAC frame to the first BTS, so that the first BTS sends the uplink MAC frame to the transmission network. The second BTS sends the uplink MAC frame to the wireless backhaul device in a wireless manner, so that the wireless backhaul device forwards the uplink MAC to the CPRI switching device through the Ethernet, so that the location where the cable is difficult to deploy can be placed. The second BTS solves the problem of wiring difficulties, thereby reducing the complexity of the wiring.

FIG. 10 is a schematic structural diagram of a second embodiment of a data transmission apparatus according to the present invention. As shown in FIG. 10, in the embodiment, the sending module 13 further includes an obtaining unit 131 and a sending unit 132.

The obtaining unit 131 is configured to acquire a CPRI slot, where the CPRI slot is used to carry the uplink MAC frame.

The sending unit 132 is configured to send the uplink MAC frame to the first BTS according to the CPRI time slot.

The data transmission device of this embodiment may be used to implement the technical solution of the data transmission method provided by any embodiment of the present invention, and the implementation principle and technical effects thereof are similar, and details are not described herein again.

FIG. 11 is a schematic structural diagram of Embodiment 3 of a data transmission apparatus according to the present invention. As shown in FIG. 11, the data transmission apparatus provided by the embodiment of the present invention includes a receiving module 21, a determining module 22, and a sending module. twenty three.

The receiving module 21 is configured to receive a downlink MAC frame that is sent by the first BTS, where the downlink MAC frame is carried on the CPRI, and the downlink MAC frame carries an IP address of the second BTS. The determining module 22 is configured to determine, according to the IP address, a port that forwards the downlink MAC frame, and the sending module 23 is configured to send the downlink MAC frame to the wireless backhaul device according to the determined port, where The wireless backhaul device converts the downlink MAC frame into a wireless downlink MAC frame, and then sends the downlink MAC frame to the second BTS.

The data transmission device provided by the embodiment of the present invention, the CPRI switching device receives the downlink MAC frame sent by the first BTS, and sends the downlink MAC frame to the wireless backhaul device, so that the wireless backhaul device converts the downlink MAC frame into the wireless downlink. After the MAC frame, it is sent to the second BTS. After the CPRI switching device sends the downlink MAC frame to the wireless backhaul device, so that the wireless backhaul device wirelessly transmits the downlink MAC frame to the second BTS, the second BTS can be placed at a location where the cable is difficult to deploy. To solve the problem of wiring difficulties, the wiring complexity can be reduced.

FIG. 12 is a schematic structural diagram of Embodiment 4 of the data transmission apparatus according to the present invention. As shown in FIG. 12, the receiving module 21 further includes an obtaining unit 211 and a receiving unit 212.

The obtaining unit 211 is configured to acquire a CPRI time slot, where the CPRI time slot is used to carry the uplink MAC frame.

The receiving unit 212 is configured to receive, according to the CPRI time slot, a downlink MAC frame sent by the first BTS.

FIG. 13 is a schematic structural diagram of Embodiment 1 of a CPRI switching device according to the present invention. As shown in FIG. 13, a CPRI switching device according to an embodiment of the present invention includes a receiver 31, a processor 32, and a transmitter 33.

The receiver 31 is configured to receive an uplink medium access control MAC frame sent by the wireless backhaul device, where the uplink MAC frame is after the wireless backhaul device receives the uplink wireless MAC frame sent by the second BTS. The processor 32 is configured to carry the uplink MAC frame on the CPRI, and the transmitter 33 is configured to send the carried uplink MAC frame to the first BTS, where A BTS forwards the uplink MAC frame to the transport network.

The CPRI switching device of this embodiment may be used to perform the implementation provided by any embodiment of the present invention. The technical solution of the data transmission method has similar implementation principles and technical effects, and will not be described herein.

Optionally, the receiver 31 is further configured to acquire a CPRI time slot, where the CPRI time slot is used to carry the uplink MAC frame.

The transmitter 33 is further configured to send the uplink MAC frame to the first BTS according to the CPRI time slot.

The CPRI switching device of this embodiment may be used to implement the technical solution of the data transmission method provided by any embodiment of the present invention, and the implementation principle and technical effects thereof are similar, and details are not described herein again.

FIG. 14 is a schematic structural diagram of Embodiment 2 of a CPRI switching device according to the present invention. As shown in FIG. 14, the CPRI switching device provided by the embodiment of the present invention includes a receiver 41, a processor 42, and a transmitter 43.

The receiver 41 is configured to receive a downlink MAC frame that is sent by the first BTS, where the downlink MAC frame is carried on the CPRI, and the downlink MAC frame carries an IP address of the second BTS. The processor 42 is configured to determine, according to the IP address, a port that forwards the downlink MAC frame, and the transmitter 43 is configured to send the downlink MAC frame to the wireless backhaul device according to the determined port, where The wireless backhaul device converts the downlink MAC frame into a wireless downlink MAC frame, and then sends the downlink MAC frame to the second BTS.

Optionally, the receiver 41 is further configured to acquire a CPRI time slot, where the CPRI time slot is used to carry the uplink MAC frame.

The receiver 41 is further configured to receive, according to the CPRI time slot, a downlink MAC frame sent by the first BTS.

It will be clearly understood by those skilled in the art that for the convenience and brevity of the description, only the division of each functional module described above is exemplified. In practical applications, the above function assignment can be completed by different functional modules as needed. The internal structure of the device is divided into different functional modules to perform all or part of the functions described above. For the specific working process of the system, the device and the unit described above, reference may be made to the corresponding process in the foregoing method embodiments, and details are not described herein again.

In the several embodiments provided by the present application, it should be understood that the disclosed system, apparatus, and method may be implemented in other manners. For example, the device embodiments described above are merely illustrative For example, the division of the module or unit is only a logical function division, and the actual implementation may have another division manner, for example, multiple units or components may be combined or integrated into another system, or some Features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interface, device or unit, and may be in an electrical, mechanical or other form.

The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, may be located in one place, or may be distributed to multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of the embodiment.

In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above integrated unit can be implemented in the form of hardware or in the form of a software functional unit.

The integrated unit, if implemented in the form of a software functional unit and sold or used as a standalone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present application, in essence or the contribution to the prior art, or all or part of the technical solution may be embodied in the form of a software product stored in a storage medium. A number of instructions are included to cause a computer device (which may be a personal computer, server, or network device, etc.) or a processor to perform all or part of the steps of the methods described in various embodiments of the present application. The foregoing storage medium includes: a U disk, a mobile hard disk, a read-only memory (ROM), a random access memory (RAM), a magnetic disk, or an optical disk, and the like. .

The above embodiments are only used to explain the technical solutions of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still The technical solutions described in the embodiments are modified, or the equivalents of the technical features are replaced by the equivalents. The modifications and substitutions of the embodiments do not depart from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

A data transmission method is characterized in that it is applied to a base station system, and the system includes a wireless backhaul device, a CPRI switching device, and a first base transceiver station BTS and at least one second BTS, and the second BTS is wirelessly Accessing the wireless backhaul device, the wireless backhaul device is connected to the CPRI switching device, and the CPRI switching device and the first BTS have a common public radio interface CPRI, the method includes:

Receiving, by the CPRI switching device, an uplink medium access control MAC frame sent by the wireless backhaul device, where the uplink MAC frame is converted by the wireless backhaul device after receiving the uplink wireless MAC frame sent by the second BTS owned;

The CPRI switching device carries the uplink MAC frame on the CPRI, and sends the carried uplink MAC frame to the first BTS, so that the first BTS forwards the uplink MAC frame. To the transmission network.
The method according to claim 1, wherein the CPRI switching device carries the uplink MAC frame on the CPRI, and sends the carried uplink MAC frame to the first BTS, including :

The CPRI switching device acquires a CPRI time slot; the CPRI time slot is used to carry the uplink MAC frame;

The CPRI switching device sends the uplink MAC frame to the first BTS according to the CPRI slot.
A data transmission method is characterized in that it is applied to a base station system, and the system includes a wireless backhaul device, a CPRI switching device, and a first base transceiver station BTS and at least one second BTS, and the second BTS is wirelessly Accessing the wireless backhaul device, the wireless backhaul device is connected to the CPRI switching device, and the CPRI switching device and the first BTS have a common public radio interface CPRI, the method includes:

Receiving, by the CPRI switching device, a downlink MAC frame sent by the first BTS; the downlink MAC frame is carried on the CPRI; and the downlink MAC frame carries an IP address of the second BTS;

Determining, by the CPRI switching device, a port that forwards the downlink MAC frame according to the IP address;

Transmitting, by the CPRI switching device, the downlink MAC frame to the none according to the determined port The line backhauling device, after the wireless backhaul device converts the downlink MAC frame into a wireless downlink MAC frame, and sends the downlink MAC frame to the second BTS.
The method according to claim 3, wherein the receiving, by the CPRI switching device, the downlink MAC frame sent by the first BTS comprises:

The CPRI switching device acquires a CPRI time slot; the CPRI time slot is used to carry the uplink MAC frame;

The CPRI switching device receives a downlink MAC frame sent by the first BTS according to the CPRI time slot.
A data transmission device, comprising:

a receiving module, configured to receive an uplink medium access control MAC frame sent by the wireless backhaul device, where the uplink MAC frame is converted by the wireless backhaul device after receiving the uplink wireless MAC frame sent by the second BTS owned;

a processing module, configured to carry the uplink MAC frame on the CPRI;

And a sending module, configured to send the uplink MAC frame that is carried to the first BTS, where the first BTS forwards the uplink MAC frame to the transport network.
The device according to claim 5, wherein the sending module comprises:

An acquiring unit, configured to acquire a CPRI time slot, where the CPRI time slot is used to carry the uplink MAC frame;

And a sending unit, configured to send the uplink MAC frame to the first BTS according to the CPRI time slot.
A data transmission device, comprising:

a receiving module, configured to receive a downlink MAC frame sent by the first BTS; the downlink MAC frame is carried on the CPRI; and the downlink MAC frame carries an IP address of the second BTS;

a determining module, configured to determine, according to the IP address, a port that forwards the downlink MAC frame;

a sending module, configured to send the downlink MAC frame to the wireless backhaul device according to the determined port, where the wireless backhaul device converts the downlink MAC frame into a wireless downlink MAC frame, and sends the downlink MAC frame to the wireless downlink device Said second BTS.
The device according to claim 7, wherein the receiving module comprises:

An acquiring unit, configured to acquire a CPRI time slot, where the CPRI time slot is used to carry the uplink MAC address frame;

And a receiving unit, configured to receive, according to the CPRI time slot, a downlink MAC frame sent by the first BTS.
A CPRI switching device, comprising:

a receiver, configured to receive an uplink medium access control MAC frame sent by the wireless backhaul device, where the uplink MAC frame is converted by the wireless backhaul device after receiving the uplink wireless MAC frame sent by the second BTS owned;

a processor, configured to carry the uplink MAC frame on the CPRI;

And a transmitter, configured to send the carried uplink MAC frame to the first BTS, where the first BTS forwards the uplink MAC frame to a transport network.
The CPRI switching device according to claim 9, wherein the receiver is further configured to acquire a CPRI slot; the CPRI slot is configured to carry the uplink MAC frame;

The transmitter is further configured to send the uplink MAC frame to the first BTS according to the CPRI time slot.
A CPRI switching device, comprising:

a receiver, configured to receive a downlink MAC frame sent by the first BTS; the downlink MAC frame is carried on the CPRI; and the downlink MAC frame carries an IP address of the second BTS;

a processor, configured to determine, according to the IP address, a port that forwards the downlink MAC frame;

a transmitter, configured to send the downlink MAC frame to the wireless backhaul device according to the determined port, where the wireless backhaul device converts the downlink MAC frame into a wireless downlink MAC frame, and sends the downlink MAC frame to the wireless downlink device Said second BTS.
The CPRI switching device according to claim 11, wherein the receiver is further configured to acquire a CPRI slot; the CPRI slot is configured to carry the uplink MAC frame;

The receiver is further configured to receive, according to the CPRI time slot, a downlink MAC frame sent by the first BTS.