CN101860888B - Method, system and equipment for transmitting data by wireless link - Google Patents

Abstract

The invention discloses a method for transmitting data through a wireless link. The method includes: a wireless network access device monitors a working link with a base station backhaul transmission system; when the wireless network access device determines the working link When a link fails, send a link switching request message to the base station backhaul transmission system through the pre-established backup link; after receiving the confirmation information returned by the base station backhaul transmission system, the wireless network access device passes The link and the base station backhaul transmission system perform data transmission. Through the present invention, the security of the link between the wireless network access equipment and the backhaul transmission system of the base station is ensured. The embodiment of the present invention also provides a system and equipment for transmitting data through a wireless link.

Description

A method, system and device for transmitting data through a wireless link

technical field

The present invention relates to the communication field, in particular to a method, system and equipment for transmitting data through a wireless link.

Background technique

The wireless link between the base station (BTS/NodeB) and the base station controller (BSC/RNC) is mostly established through the base station backhaul transmission system. In order to ensure the reliability of the base station business, the base station backhaul transmission system has set up related protection mechanisms. In order to avoid damage to the wireless service carried by the wireless link caused by the failure of the base station backhaul transmission system itself (such as node failure or fiber cut, etc.).

The base station backhaul transmission system architecture can be an MSTP ring structure composed of multi-service transmission node (Multi-Service Transmission Platform, MSTP) devices. As shown in Figure 1, there are multiple MSTP devices in the MSTP ring structure, and one MSTP device can Establishing a connection with at least one base station and at least one base station controller, a base station connected to an MSTP device in the MSTP ring can be connected to a base station controller connected to an MSTP device in the MSTP ring.

In the MSTP ring structure, the internal protection of the base station backhaul transmission system can be realized by using SubNetwork Connection Protection (SNCP) or MSPRing internally, that is, when a certain MSTP device in the MSTP ring structure fails, The standby MSTP equipment can be used to switch the failed MSTP equipment in time. Generally, the switching time is within 50ms, and the execution of wireless services will not be affected.

However, in the MSTP ring structure shown in Figure 1, there is a link between a base station and an MSTP device, and there is also a link between a base station controller and an MSTP device. If the link between the base station and the MSTP device is due to the link If the link between the base station controller and the MSTP device is interrupted due to the link itself, the base station will lose its connection with the MSTP device, which will cause the base station to be unable to connect to the base station controller; if the link between the base station controller and the MSTP device is interrupted due to the link itself, it will cause The base station controller cannot access the backhaul transmission system of the base station, which causes the base station controller to lose contact with the base station connected to itself. When the links between multiple base stations, base station controllers, and MSTP equipment are interrupted, the communication link may be paralyzed.

Contents of the invention

The embodiment of the present invention provides a method system and equipment for transmitting data through a wireless link, and the present invention ensures the security of the link between the wireless network access equipment and the backhaul transmission system of the base station.

A method of transmitting data over a wireless link, the method comprising:

The working link between wireless network access equipment monitoring and base station backhaul transmission system;

When the wireless network access device determines that the working link is faulty, it sends a link switching request message to the backhaul transmission system of the base station through a pre-established standby link, and the link switching request message carries the Identification of the backup link;

When the base station backhaul transmission system determines that no link recovery message is received from the wireless network access device within a set period of time, the base station backhaul transmission system monitors the working link and determines that the working link is faulty, And, according to the received identifier of the standby link, it is determined that the standby link is in a normal working state, and the confirmation information is returned to the wireless network access device, and the link restoration message is used to indicate that the working link is in a normal working state working status;

After receiving the confirmation information returned by the base station backhaul transmission system, the wireless network access device performs data transmission with the base station backhaul transmission system through the backup link.

A system for transmitting data through wireless links, including wireless network access equipment and base station backhaul transmission equipment, wherein:

The wireless network access device is used to monitor the working link with the backhaul transmission equipment of the base station, and when it is determined that the working link fails, send a link switch to the backhaul transmission equipment of the base station through a pre-established backup link request message, and after receiving the confirmation information returned by the base station backhaul transmission equipment, perform data transmission with the base station backhaul transmission equipment through the backup link;

The base station transmits back the transmission device, which is used to determine whether a link recovery message from the wireless network access device arrives within a set time period after receiving the link switching request message, and if not received, send the message to the Monitoring the working link, determining that the working link is faulty, and determining that the standby link is in a normal working state according to the identifier of the standby link in the received link switching request message, sending the wireless network access device Return the confirmation information, and perform data transmission with the wireless network access device through the backup link.

A wireless network access device, the wireless network access device comprising:

The link monitoring module is used to monitor the working link with the backhaul transmission equipment of the base station;

A request message sending module, configured to send a link switching request message to the base station backhaul transmission device through a pre-established backup link when the monitoring result shows that the working link is faulty, and the link switching request message carries the identification of the backup link;

The confirmation information receiving module is used to receive the confirmation information returned by the base station backhaul transmission equipment. The confirmation message is when the base station backhaul transmission system determines that the link recovery message is not received within the set time period Monitor the working link, determine that the working link is faulty, and determine that the standby link is in a normal working state according to the received identifier of the standby link and return, and the link recovery message is used to indicate The working link is in a normal working state;

A data transmission module, configured to perform data transmission with the backhaul transmission system of the base station through the backup link.

The present invention pre-establishes a backup link between the wireless network access device and the base station backhaul transmission system, and when the working link fails, the backup link is used to transmit data, thereby ensuring the wireless network access device and the base station backhaul transmission system The link between them is safe and realizes the continuous transmission of data.

Description of drawings

FIG. 1 is a schematic diagram of a link connection between a base station backhaul transmission system and a base station/base station controller in the prior art;

FIG. 2 is a schematic diagram of steps of a method for transmitting data through a wireless link in Embodiment 1 of the present invention;

FIG. 3 is a schematic diagram of steps of a method for transmitting data through a wireless link in Embodiment 2 of the present invention;

FIG. 4 is a schematic structural diagram of a system for transmitting data through a wireless link in Embodiment 3 of the present invention;

FIG. 5 is a schematic structural diagram of a wireless network access device in Embodiment 4 of the present invention;

6 is a schematic diagram of link switching between a base station and an MSTP device in Embodiment 4 of the present invention;

FIG. 7 is a schematic diagram of link switching between a base station controller and an MSTP device in Embodiment 4 of the present invention.

Detailed ways

In order to improve the security of the link between the wireless network access device and the base station backhaul transmission system, so that the wireless network access device and the base station backhaul transmission system can realize data transmission safely and stably, the present invention proposes that the wireless network access device At least one backup link is pre-established with the base station backhaul transmission system. When the working link between the wireless network access device and the base station backhaul transmission system fails, the backup link is used to transmit data to ensure the continuity of data transmission.

The wireless network access equipment involved in various embodiments of the present invention may be one or both of base stations (BTS/NodeB) or base station controllers (BSC/RNC), that is, they may be base stations or base station controllers The data transmission with the base station backhaul transmission system may also be the data transmission between the base station and the base station controller and the base station backhaul transmission system at the same time. The base station backhaul transmission system may be a system composed of at least one service transmission node MSTP device. The identifier of the link involved is information that can uniquely describe the link.

Embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings.

As shown in FIG. 2, it is a schematic diagram of the steps of the method for transmitting data through a wireless link in Embodiment 1 of the present invention. It can be seen from the figure that the method includes the following steps:

Step 101: The wireless network access device monitors the working link between itself and the backhaul transmission system of the base station.

The wireless network access device mainly monitors the working state of the working link itself, and judges whether the current working state of the working link is a normal working state or a failure.

Step 102: When the wireless network access device determines that the working link is faulty, send a link switching request message to the backhaul transmission system of the base station through a pre-established standby link.

The link switching request message carries the identifier of the standby link transmitting the link switching request message.

If the wireless network access device is a base station, which is connected to an MSTP device in the backhaul transmission system of the base station, at least one backup link may be pre-established between the base station and the MSTP device. When the working link fails, step 102 may be performed by selecting a backup link from at least one pre-established backup link.

Step 103: After receiving the confirmation information returned by the backhaul transmission system of the base station, the wireless network access device performs data transmission with the backhaul transmission system of the base station through the backup link.

Through the method from step 101 to step 103, a link protection mechanism between the wireless network access device and the base station backhaul transmission system is established to ensure the security of data transmission between the wireless network access device and the base station backhaul transmission system.

Embodiment 2 is a preferred implementation of the present invention. It is assumed that the wireless network access device in Embodiment 2 is a base station, and the base station is connected to an MSTP device in the backhaul transmission system of the base station, as shown in FIG. 3 . Schematic diagram of the steps of the second embodiment of the invention:

Step 201: the base station establishes multiple links with the MSTP device, and initially uses one of the links as a working link, and the other link as a standby link.

Both the base station and the MSTP device record the relevant information of the working link and the relevant information of the standby link at the same time. The related information of the link includes the identifier of the link, the port information when the base station uses the link, the port information when the MSTP device uses the link, and the like.

Step 202: the base station monitors the working state of the working link, and if the working link is in a normal working state, continue to execute this step; otherwise, go to step 203.

Step 203: the base station selects a backup link from multiple backup links, and sends a link switching request message to the MSTP device through the selected backup link.

The link switching request message carries the identifier of the selected standby link.

Step 204: After receiving the link switching request message, the MSTP device waits for a set time period, and judges whether the base station sends a link recovery message to the MSTP device within the time period; if so, jumps to step 202; otherwise, Jump to step 205.

In the actual data transmission process, there may be special circumstances such as flash disconnection of the link. The link has not failed, and the link can resume normal transmission in a short time. If the link is switched under such special circumstances On the contrary, it will increase the service volume of the base station and MSTP equipment, which is not conducive to the data transmission between the base station and MSTP equipment. Therefore, after receiving the link switching request message, the MSTP device does not directly use the standby link to transmit data, but waits for a period of time. After the link returns to the normal working state, it will send a link recovery message to the MSTP device; if the link recovery message is not received after waiting for a period of time, it is considered that the working link is likely to be faulty.

The set time period for waiting is longer than the disconnection time period for special cases such as link flashing.

Step 205: The MSTP device monitors the working link, and further judges whether the working link is faulty, and if not, notifies the base station of the judgment result, and skips to step 202; otherwise, skips to step 206.

After step 204, the MSTP device believes that the current working link is likely to fail, so it will personally monitor the working link.

Step 206: The MSTP device determines whether the standby link is in a normal working state according to the received identifier of the standby link, and if so, skips to step 207; otherwise, skips to step 203.

When the MSTP device determines that the working link fails and needs to perform link switching, it will detect whether the backup link selected by the base station is available. If available, the backup link selected by the base station is used to transmit data; otherwise, the base station is required to reselect an available backup link.

Step 207: The base station and the MSTP device respectively perform link switching, transmit data through the selected backup link, and jump to step 202.

The link switching process of the base station may include:

The base station disconnects its own data output port and data input port from the working link; then establishes the connection of its own data output port and data input port to the standby link to implement link switching.

The process of link switching by MSTP equipment may include:

The MSTP device disconnects its own data output port and data input port from the working link; then establishes its own data output port and data input port to connect to the standby link to realize link switching.

After the base station and the MSTP device perform link switching, the data output port of the base station transmits data to the MSTP device through the backup link, and the data input port of the base station receives data from the MSTP device through the backup link.

In this embodiment, the standby link may be established simultaneously with the working link, or the standby link may be established after the working link is established. The working link and the standby link are not fixed. For example, there are currently two links, namely link 1 and link 2, and the current link 1 is the working link, and link 2 is the standby link. When link 1 fails, data is transmitted through link 2, then link 2 becomes a working link at this time, and link 1 can be used as a backup link after the failure of link 1 is eliminated.

The data transmission process between the base station controller and the MSTP device is the same as the data transmission process between the base station and the MSTP device in the second embodiment.

Embodiment 3 of the present invention also provides a system for transmitting data through wireless links, as shown in Figure 4, the system for transmitting data through wireless links includes wireless network access equipment and base station backhaul transmission equipment, wireless network access equipment Including the base station and the base station controller, the backhaul transmission equipment of the base station includes multiple MSTP equipment. The specific description of the system for wireless link data transmission is as follows:

The wireless network access device is used to monitor the working link with the backhaul transmission equipment of the base station, and when it is determined that the working link fails, send a link switching request to the backhaul transmission equipment of the base station through a pre-established backup link message, and after receiving the confirmation information returned by the base station return transmission equipment, perform data transmission with the base station return transmission equipment through the backup link; the base station return transmission equipment is used to receive the link switching request message , returning confirmation information to the wireless network access device, and performing data transmission with the wireless network access device through the backup link.

The base station backhaul transmission device is used to determine whether a link recovery message from the wireless network access device has been received within a set time period after receiving the link switch request message, and if not received, send a message to the wireless network The network access device returns the confirmation information.

The backhaul transmission device of the base station is used to monitor the working link, determine that the working link is faulty, and determine that the standby link is in the In a normal working state, return the confirmation information to the wireless network access device.

Embodiment 4 of the present invention also provides a wireless network access device, as shown in Figure 5, the wireless network access device includes a link monitoring module 11, a request message sending module 12, an acknowledgment information receiving module 13 and a data transmission module 14, wherein: the link monitoring module 11 is used to monitor the working link with the backhaul transmission equipment of the base station; the request message sending module 12 is used to send the link through the pre-established backup link when the monitoring result shows that the working link fails. Send a link switching request message to the backhaul transmission equipment of the base station; the confirmation information receiving module 13 is used to receive the confirmation information returned by the backhaul transmission equipment of the base station; transmission system for data transmission.

The wireless network access device also includes a selection module 15, configured to select a backup link from a plurality of pre-established backup links; the request message sending module 12 is used for when the monitoring result is that the working link is faulty , sending a link switching request message to the base station backhaul transmission device through the selected standby link, where the message carries the identifier of the selected standby link.

The wireless network access device in this embodiment may be a base station or a base station controller. The process of link switching performed by the data transmission module 14 in the base station and the link switching process performed by the data transmission module 14 in the base station controller are respectively described below. The process of switching.

As shown in FIG. 6 , it is a schematic diagram of link switching between the data transmission module 14 in the base station and the MSTP device, wherein the solid line indicates the working link, and the dotted line indicates the standby link. The data transmission module 14 in the base station has a data sending unit and a data receiving unit, and the data in the data sending unit is sent to the MSTP device through the sending switching unit. Before link switching, the sending switching unit connects the data output port to the working link; when performing link switching, the sending switching unit disconnects the data output port from the working link and connects it to the backup link. The data receiving unit receives data from the MSTP device through the receiving switching unit. Before link switching, the receiving switching unit connects the data input port to the working link; when performing link switching, the receiving switching unit connects the data input port to the working link. The link is disconnected and connected to the standby link. The process of link switching inside the MSTP device is the same as the process of link switching inside the base station.

The link switching process between the data transmission module 14 in the base station controller and the MSTP equipment is the same as the link switching process between the data transmission module 14 in the base station and the MSTP equipment, and its structure diagram is shown in FIG. 7 .

Through the method, system and equipment provided by the embodiments of the present invention, the link security between the base station/base station controller and the MSTP equipment is guaranteed, and the continuous transmission of data is realized; moreover, the judgment mechanism of whether the link is switched by the MSTP equipment , which avoids switching when the link does not actually fail, and reduces the traffic between the base station/base station controller and the MSTP equipment.

Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention also intends to include these modifications and variations.

Claims (6)

1. method through the transmission of radio links data is characterized in that said method comprises:

Active link between wireless network access device monitoring and base station upstream transmission system;

When said wireless network access device is confirmed said active link fault, send link switchover request message, the sign of carrying said reserve link in the said link switchover request message to said base station upstream transmission system through the reserve link set up in advance;

When base station upstream transmission system confirms in the setting-up time section, not receive from the link-recovery message of wireless network access device; Base station upstream transmission system monitors said active link; Confirm said active link fault, and, confirm that according to the sign of the reserve link that receives said reserve link is in normal operating conditions; Return confirmation to wireless network access device, said link-recovery message is used to indicate said active link to be in normal operating conditions;

Wireless network access device carries out transfer of data through said reserve link and base station upstream transmission system after receiving the affirmation information that base station upstream transmission system returns.

2. the method for claim 1 is characterized in that, said wireless network access device sends the link switchover request message through the reserve link set up in advance to said base station upstream transmission system, comprising:

Wireless network access device is selected a reserve link from many reserve links of setting up in advance;

Wireless network access device sends the link switchover request message through the said reserve link selected to said base station upstream transmission system, and the sign of the reserve link that carries in the said message is the sign of the said reserve link selected.

3. like the arbitrary described method of claim 1～2, it is characterized in that,

Wireless network access device is base station and/or base station controller, the system that said base station upstream transmission system is made up of at least one professional transmission node MSTP equipment.

4. the system through the transmission of radio links data is characterized in that, comprises wireless network access device and base station upstream transmission equipment, wherein:

Wireless network access device; Be used to monitor active link with base station upstream transmission equipment room; When confirming said active link fault; Reserve link through setting up in advance sends the link switchover request message to said base station upstream transmission equipment, and after receiving the affirmation information that base station upstream transmission equipment returns, carries out transfer of data through said reserve link and base station upstream transmission equipment;

Base station upstream transmission equipment; After being used to receive said link switchover request message, when confirming in the setting-up time section, whether to arrive the link-recovery message from wireless network access device, if do not receive; Then said active link is monitored; Confirm said active link fault, and, when confirming that according to the sign of the reserve link in the link switchover request message that receives said reserve link is in normal operating conditions; Return said confirmation to wireless network access device, and carry out transfer of data through said reserve link and wireless network access device.

5. a wireless network access device is characterized in that, said wireless network access device comprises:

The link monitoring module is used to monitor the active link with base station upstream transmission equipment room;

The request message sending module; Be used for when monitoring result is said active link fault; Reserve link through setting up in advance sends link switchover request message, the sign of carrying said reserve link in the said link switchover request message to said base station upstream transmission equipment;

The confirmation receiver module; Be used to receive the affirmation information that base station upstream transmission equipment returns; Said acknowledge message is that base station upstream transmission system is when confirming in the setting-up time section, not receive link-recovery message; Base station upstream transmission system monitors said active link, confirms said active link fault, and; Confirm that according to the sign of the reserve link that receives said reserve link is in that normal operating conditions returns, said link-recovery message is used to indicate said active link to be in normal operating conditions;

Data transmission module is used for carrying out transfer of data through said reserve link and base station upstream transmission system.

6. wireless network access device as claimed in claim 5 is characterized in that, said wireless network access device also comprises:

Select module, be used for selecting a reserve link from many reserve links of setting up in advance;

The described request message transmission module; Be used for when monitoring result is said active link fault; Said reserve link through selecting sends link switchover request message, the sign of carrying the said reserve link of selection in the said message to said base station upstream transmission equipment.

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