WO2013000288A1

WO2013000288A1 - Link switching method, device and system

Info

Publication number: WO2013000288A1
Application number: PCT/CN2012/071726
Authority: WO
Inventors: 翟军治; 朱新峰; 王星辉
Original assignee: 中兴通讯股份有限公司
Priority date: 2011-06-29
Filing date: 2012-02-28
Publication date: 2013-01-03
Also published as: CN102857951A

Abstract

Disclosed are a link switching method, device and system. The method comprises: connecting a BTS to an active BSC and establishing an active transmission link; connecting the BTS to a standby BSC and establishing a standby transmission link; and the BTS determining that a fault occurs in a transmission link currently in a working state in the active transmission link and the standby transmission link, and switching current services to the other transmission link for processing. With the present invention, requirements for high reliability of communication systems can be met, and meanwhile, the problem of resource waste in the relevant technologies can be solved.

Description

The present invention relates to the field of communications, and in particular to a link switching method, apparatus, and system. BACKGROUND OF THE INVENTION Currently, GSM (Global System of Mobile Communication) has been widely applied to high-speed railway transportation. For the application requirements and usage characteristics of high-speed railways, more challenges have been put forward on the reliability and disaster tolerance of mobile communication systems. Requirements. In response to the above requirements, the following two main solutions are mainly used: one is a dual BSC (Base Station Controller), and a dual plane solution. Each BSC is connected to a plane BTS (Base Transceiver Station), and the BTSs of the two planes are redundant by interleaving coverage. When a BTS is damaged, it will be supplemented by two adjacent BTSs. However, this networking scheme will cause frequent cross-BSC switching, which will also cause frequency resources to be strained and affect subsequent capacity expansion. The other is a scheme for redundant backup of primary and secondary base stations. The primary and secondary base stations are in the same BSC, the frequency sequence is the same, and the coverage area is the same. In normal conditions, the primary network uses the shared frequency, and the standby network carrier frequency is not in the state of receiving and receiving messages. When the primary network carrier frequency fails, the standby is activated. Site, working with shared frequencies. However, this networking solution requires additional resources to double the number of deployed base stations and waste resources. In view of the problem that both networking methods in the related technologies cause waste of resources, no effective solution has been proposed yet. SUMMARY OF THE INVENTION A primary object of the present invention is to provide a link switching method, apparatus, and system that can meet the requirements for high reliability of a communication system and solve the problem of resource waste caused by the related art. According to an aspect of the present invention, a link switching method is provided, including: a base station (BTS) is connected to a primary base station controller (BSC) to establish a primary transmission link; and the BTS is connected to a backup BSC to establish a backup transmission chain. The BTS determines that the transmission link currently in the active transmission link and the backup transmission link is faulty, and switches the current service to another transmission link for processing. Preferably, after the BTS establishes the primary transmission link and the backup transmission link, before determining that the transmission link that is currently in the working state fails, the method further includes: the BTS initializing the primary transmission link and the Determining a state of the transmission link, setting a state of the primary transmission link to an active state, setting a state of the backup transmission link to an inactive state; and selecting, by the BTS, the primary transmission chain in an active state Road to work. Preferably, the BTS is connected to the primary BSC and the standby BSC, and the BTS is connected to the primary BSC through an abis interface in a primary direction; the BTS is connected to the secondary BSC through a standby abis interface. The primary transmission link corresponding to the abis interface in the primary direction of the BTS and the secondary transmission link corresponding to the abis interface in the standby direction exist simultaneously. Preferably, the BTS determines that the currently active transmission link is faulty, and the method includes: the BTS periodically detecting states of the primary transmission link and the secondary transmission link; and the BTS detects current The transmission link corresponding to the used abis interface is disconnected, and it is determined that the transmission link currently in the working state is faulty. Preferably, the transmission link of the BTS in the working state is faulty, and after the current service is switched to another transmission link for processing, the method further includes: the BTS synchronously switching the media plane channel and the background maintenance channel. Preferably, the method further includes: when the BTS switches the current service to the backup transmission link for processing, the BTS detects that there is no service on the backup transmission link within a preset time, and the main The transmission link can transmit data; the BTS reverses the service on the backup transmission link back to the primary link for processing. Preferably, before the BTS is connected to the primary BSC and the standby BSC, the method further includes: the BTS setting a Flex abis switch, when the Flex abis switch is enabled, applying a primary and secondary abis interfaces, and supporting simultaneous connection The master BSC and the standby BSC. According to another aspect of the present invention, a link switching apparatus is provided, which is disposed in a base station (BTS), and includes: a primary connection module, configured to connect with a primary base station controller (BSC) to establish a primary transmission link; a connection module, configured to connect with the backup BSC, and establish a backup transmission link; the handover module is configured to determine that the transmission link currently in the active transmission link and the backup transmission link is faulty, and the current service is Switch to another transmission link for processing. Preferably, the device further includes a detecting module, configured to detect that there is no service on the backup transmission link within a preset time when the current service is switched to the backup transmission link for processing, and the primary transmission chain The circuit is capable of transmitting data; the switching module is further configured to switch the service on the backup transmission link back to the primary link for processing. According to another aspect of the present invention, a link switching system is provided, including a base station (BTS), a primary base station controller (BSC), and a standby BSC: the BTS is set to be connected to the primary BSC to establish a primary transmission. Linking with the standby BSC to establish a backup transmission link; determining that the transmission link in the working state is faulty, and switching the current service to another transmission link for processing; the primary BSC is set to The BTS connection is established to establish the primary transmission link; the standby BSC is configured to be connected to the BTS to establish the backup transmission link. Preferably, the BTS is further configured to detect that there is no service on the backup transmission link within a preset time when the current service is switched to the backup transmission link for processing, and the primary transmission link can transmit Data: The service on the backup transmission link is switched back to the primary link for processing. In the embodiment of the present invention, the BTS is connected to the primary BSC to establish a primary transmission link; the BTS is connected to the secondary BSC to establish a secondary transmission link; and the BTS determines a transmission chain currently in a working state in the primary transmission link and the backup transmission link. The road fails, and the current service is switched to another transmission link for processing. That is, in the embodiment of the present invention, one BTS is connected to two BSCs of the primary BSC and the secondary BSC, and the board-level backup of the BTS is implemented, and the backup of the primary and secondary sites is not required, thereby saving operational investment, and further It can improve the disaster tolerance of the BSC level. In addition, the base station works under different BSCs and uses the same frequency point configuration, which can improve the subsequent capacity expansion. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set to illustrate,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,,, BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a flowchart of a process of a link switching method according to an embodiment of the present invention; FIG. 2 is a flowchart of a process for setting a Flex abis switch in the background according to Embodiment 1 of the present invention; FIG. 4 is a flowchart of a process of performing primary-to-standby transmission configuration in the background according to the first embodiment of the present invention; FIG. 4 is a flowchart of initializing the primary and backup links after the initial power-on of the base station according to the first embodiment of the present invention; FIG. 5 is a flowchart of processing performed by a base station to perform an abis port link switching process according to Embodiment 1 of the present invention; FIG. 6 is a flowchart of a process of switching between a media plane channel and a background operation and maintenance channel according to Embodiment 1 of the present invention; FIG. 7 is a flowchart of automatically reverting the primary direction of a base station according to Embodiment 1 of the present invention; FIG. 8 is a flowchart of a process of performing a primary-to-standby direction transmission configuration in a background according to Embodiment 2 of the present invention; FIG. 9 is a background implementation of Flex in a third embodiment according to an embodiment of the present invention. FIG. 10 is a flowchart of a process for performing primary and backup direction transmission configuration in the background according to Embodiment 3 of the present invention; FIG. 11 is a first embodiment of a base station according to Embodiment 3 of the present invention; FIG. 12 is a flowchart of a process for performing an abis port link switching process in a base station according to Embodiment 3 of the present invention; FIG. 13 is a flowchart according to an embodiment of the present invention. FIG. 14 is a flowchart of a process for switching a base station to automatically return to a primary direction flow; FIG. 14 is a diagram of a link switching device according to an embodiment of the present invention. Species schematic structure; FIG. 15 is a diagram showing the structure of the switching device according to a second embodiment of the present invention, the link; FIG. 16 is a schematic structural link switching system according to an embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. It should be noted that the embodiments in the present application and the features in the embodiments may be combined with each other without conflict. Two types of networking modes mentioned in the related art may cause frequent cross-BSC switching, and also cause frequent frequency resources and affect subsequent capacity expansion. Another networking solution requires additional resources to enable the number of deployed base stations. Double, waste resources. It can be seen that the networking methods involved in the related technologies all cause waste of resources. To solve the above technical problem, the embodiment of the present invention provides a link switching method, and the processing flow thereof is as shown in FIG. 1 , including: Step S102: The BTS is connected to the primary BSC to establish a primary transmission link; Step S104, BTS and The backup BSC is connected to establish a backup transmission link. Step S106: The BTS determines that the transmission link currently in the active transmission link and the backup transmission link is faulty, and switches the current service to another transmission link for processing. In the embodiment of the present invention, the BTS is connected to the primary BSC to establish a primary transmission link; the BTS is connected to the secondary BSC to establish a secondary transmission link; and the BTS determines a transmission chain currently in a working state in the primary transmission link and the backup transmission link. The road fails, and the current service is switched to another transmission link for processing. That is, in the embodiment of the present invention, one BTS is connected to two BSCs of the primary BSC and the secondary BSC, and the board-level backup of the BTS is implemented, and the backup of the primary and secondary sites is not required, thereby saving operational investment, and further It can improve the disaster tolerance of the BSC level. In addition, the base station works under different BSCs and uses the same frequency point configuration, which can improve the subsequent capacity expansion. In the implementation, after the BTS establishes the primary transmission link and the backup transmission link, before determining that the currently active transmission link fails, the following operations may also be performed: The BTS initializes the status of the primary transmission link and the backup transmission link, and The status of the primary transmission link is set to the working state, and the state of the secondary transmission link is set to the non-working state; the BTS selects the active transmission link to work. In the implementation, the BTS can be connected to the primary BSC and the standby BSC in multiple manners, for example, using the wireless network to connect with the primary BSC and the standby BSC, or by using the wired network to connect with the primary BSC and the standby BSC. Preferably, the BTS includes: The abis interface in the main direction is connected to the primary BSC. The BTS is connected to the standby BSC through the standby abis interface. The primary transmission link corresponding to the abis interface in the BTS direction and the secondary transmission link corresponding to the standby abis interface exist simultaneously. . In the implementation, the BTS can periodically detect the status of the primary transmission link and the backup transmission link in order to determine whether the transmission link currently in the working state is faulty. The BTS detects that the transmission link corresponding to the currently used abis interface is disconnected. Then it is determined that the transmission link that is currently in operation is faulty. In an embodiment, after the BTS is currently in the working state, the transmission link is faulty, and the current service is switched to another transmission link for processing. The BTS also needs to synchronously switch the media plane channel and the background maintenance channel to ensure information. Synchronize updates to ensure the accuracy of subsequent operations.

When the BTS switches the current service to the backup transmission link for processing, the BTS detects that there is no service on the backup transmission link within a preset time, and the primary transmission link can transmit data. The BTS switches the service on the backup transmission link. Go back to the main link for processing. The BTS uses a rewind mechanism to enable as many sites as possible to work on the primary transport link, reducing handovers across the BSC. Of course, before the BTS is connected to the primary BSC and the standby BSC, the BTS includes: The BTS sets the Flex abis switch. When the Flex abis switch is enabled, the active and standby abis interfaces are applied to support the primary BSC and the standby BSC. Use this switch to achieve mutual exclusion with other work of the base station. In summary, the purpose of the embodiments of the present invention is to provide a method for performing dynamic switching access according to the abis interface link state and implementing BSC level redundancy backup. This scheme is called Flex abis, that is, the BTS is connected to the primary and backup BSCs at the same time, and the link transmission links are respectively established. Currently, only one link is working. When the transmission link in the working state fails, the BTS can dynamically switch to work under another BSC. The technical solution adopted by the link switching method provided by the embodiment of the present invention may include the following steps: Step 1: The base station supports the Flex abis switch setting; Step 2: The base station supports the primary and backup direction transmission configuration, and the primary and backup direction abis port control The link can exist at the same time. Step 3: After the base station is powered on, complete the link establishment process of establishing the abis link with the primary and backup BSCs, and first select the link in the primary direction to initialize the work of the two links. Step 4: The base station periodically detects the status of the active and standby links. If it detects that the currently used abis port is broken and the other link is in the normal state, it switches to another link. Step 5: When the base station performs the abis port link switch, the media plane channel and the background maintenance channel also need to be switched synchronously. Step 6: When the base station works in the standby direction, if it detects that there is no service currently, and the link in the active direction is normal, Then the base station will automatically return to work on the active link. Compared with the prior art, the present invention at least includes the following advantages:

1. At present, the base station has achieved the board-level backup. It does not need to back up the primary and backup sites, saving operational investment. This solution can improve the BSC-level disaster tolerance capability. 2. When the base station works under different BSCs, the same frequency point configuration can be used to improve the subsequent capacity expansion.

3. The automatic rewinding mechanism of the base station can make as many stations work as possible in the main direction and reduce the switching across the BSC. There are a variety of transmission links that can be used for the Abis interface, and are not limited to the networking modes and link protocols used in the embodiments of the present invention. The technical solutions provided by the embodiments of the present invention are described in detail below to further understand the objects, aspects and functions of the embodiments of the present invention, but are not intended to limit the scope of the appended claims. Example 1 In this embodiment, an IP (Internet Protocol) Over El (El-based IP) networking is used as an application scenario, and a link layer uses a Point-to-Point Protocol (PPP). The upper layer is the IP network layer, and the transport layer uses SCTP (Stream Control Transmission Protocol). The link status of the Abis interface is based on the continuity of the SCTP link. In this example, the above steps 1 to 6 are specifically analyzed: Step one, the Flex abis switch setting is performed in the background. Set to Flex abis to distinguish the common configuration, the switch is used to achieve mutual exclusion with other functions of the base station. The configuration process is shown in Figure 2. The BTS will perform the following operations: Step S202: Receive background configuration parameters; Step S204: Switch The value of the field is stored in the database; Step S206: End. Step 2: Perform the primary and backup direction transmission configuration in the background. In the Flex abis mode, the background must be configured with both the primary and backup SCTP, the OMCB (Operation and Maintenance Centre for NodeB, Node B operation and maintenance center) channel, and the primary and backup user planes can be loaded under the configuration parameters. hair. Referring to FIG. 3, the BTS will perform the following operations: Step S302: Receive a background parameter configuration; Step S304: Configure an E1 port in the primary and backup directions, and configure a PPP link layer bearer based on the E1 port, and configure an IP on the link layer. Step S306: Configure an SCTP control plane link in the primary and backup directions based on the IP layer; Step S308: Configure an operation and maintenance channel in the primary and backup directions based on the IP layer. Step S310: Configure a user plane bearer channel in the primary and backup directions based on the IP layer. Step S312: End. Step 3: Initialization process of the primary and backup links after the initial power-on of the base station. Referring to FIG. 4, the BTS performs the following operations: Step S402: After the power is turned on, the SCTP link is established with the primary and secondary BSCs respectively. Step S404: Identify the coupling number and the primary and secondary identifiers configured according to each SCTP link. Primary and backup links. Determining whether the SCTP in the primary direction has been established. If the chain has been established, step S406 is performed. Otherwise, step S408 is performed. Step S406: Initializing the active link to an active state, and initializing the alternate direction link to an inactive state. Step S418: Step S408: Determine whether the standby direction SCTP is built. If the chain is already established, go to step S410, otherwise go to step S422; Step S410: Start timer T1; Step S412: If T1 arrives before the time in the main direction If the SCTP is established, step S414 is performed, otherwise step S416 is performed; step S414: killing the timer T1, initializing the active link to the active state, and initializing the alternate direction link to the inactive state, and executing step S418; S416: When the timer T1 expires, the process of switching from the primary link to the standby link is performed. For the link switching process, see step 4; Step S418: Selecting the SCTP coupling in the working state to interact with the BSC, requesting wireless parameter configuration. Step S420: Receive the wireless configuration parameters delivered by the BSC, complete the parameter configuration process; Step S422: End. Step 4: The base station performs an abis port link switching process. Referring to FIG. 5, the BTS will perform the following operations: Step S502: During the detection process, find that the currently used SCTP (a) link is broken; Step S504: determining another link pattern of the SCTP (b). If the status is normal, executing step S506, executing step S514; step S506, setting the SCTP (b) link to the working state, and setting SCTP (a) to Step S508: Send an access message to the currently connected BSC using SCTP (b); Step S510: Re-configure the configuration parameter to the BSC, and complete the configuration process; Step S512: Complete the media plane channel and the background maintenance channel Synchronous switching. For the specific switching process, see step 5; Step S514: End. Step 5: The switching process of the media plane channel and the background operation maintenance channel. The media plane and the maintenance plane channel and the same IP index are referenced by the SCTP. The handover process is shown in FIG. 6. The BTS will: Step S602: Determine the current primary and backup directions according to the current coupling number of the SCTP; Step S604: Update the background The configuration parameters of the maintenance plane channel are re-completed to complete the chain-building process between the base station and the background. Step S606: Update the maintenance plane channel parameters, and complete the reconstruction process of the media plane channel by the upper-layer application; Step S608: End. Step 6: The base station automatically reverts back to the main direction flow. If the base station works in the standby direction and detects that the active direction link has returned to normal, and there is no service currently, the base station will automatically switch to the active direction. Referring to FIG. 7, the BTS will perform the following operations: Step S702: Set the primary direction SCTP to the active state and the standby direction SCTP to the inactive state; Step S704: Send the access message to the currently connected BSC using the primary SCTP. Step S706: Perform a wireless parameter request to the BSC, and complete the configuration process. Step S708: Complete the synchronous switching of the media plane channel and the background maintenance channel. For the specific switching process, refer to step 5; Step S710: End. Example two This embodiment uses Ethernet for networking. The bottom layer is the Ethernet link layer, the network layer uses the IP protocol, and the transport layer uses the SCTP protocol. The link status of the Abis interface is based on the continuity of the SCTP link. Compared with the first example, this embodiment differs only in the operation of the transmission configuration. The flow of this embodiment is also completed using steps one to six. The other steps are the same except that step two is different from example 1. The execution of step two in this embodiment is as shown in FIG. 8, and includes:

Less S802: Received background parameter configuration; Niu Peng

Less S804: Configure the FE or GE port, and configure the IP layer based on the Ethernet port;

Niu Peng

Less S806: Based on the IP layer, configure the SCTP control plane link in the primary and backup directions;

Less S808: Based on the IP layer, configure the operation and maintenance channels of the primary and backup directions;

S810: Based on the IP layer, configure the user plane bearer channel in the primary and backup directions; Step S812: End.

Two

Example - In this embodiment, the Abis port is accessed by E1, and the control plane link between the base station and the controller uses a Link Access Procedure of D-channel (D-channel access protocol) protocol, in this example. The configuration of the link layer of the control plane and the judgment status of the link state of the abis port are different from those of the first and second examples. The implementation steps of the example are as follows: Step 1: The Flex abis switch is set in the background. Set to Flex abis to distinguish the common configuration, the switch is used to implement mutual exclusion with other functions of the base station. The configuration process is shown in FIG. 9. The BTS will perform the following operations: Step S902: Receive background configuration parameters; Step S904: The value of the switch field is stored in the database; Step S906: End. Step 2: Perform the primary and backup direction transmission configuration in the background. In the Flex abis mode, the background must be configured with both the primary and backup E1 ports and the time slot resources used on each port to configure the primary and backup Lapd links. Referring to FIG. 10, the BTS will perform the following operations: Step S1002: Receive background configuration parameters; Step S1004: Configure the primary and backup direction El ports, and the time slot resources used on each port. Step S1006: Configure the Lapd control plane link in the primary and backup directions based on the E1 port. Step S1008: End. When using E1 access, there is no need to configure the media plane and background maintenance channel, and the media plane data is transmitted in the format of the underlying voice frame. The maintenance channel is no longer connected to the base station through the abis port. All configurations are delivered through the BSC in the form of abis interface parameters. Step 3: Initialization process of the primary and backup links after the initial power-on of the base station. Referring to FIG. 11, the BTS will perform the following operations: Step S1102: After the power is turned on, the Lapd link is established with the primary and secondary BSCs respectively. Step S1104: Identify the link number and the primary and secondary identifiers configured according to each Lapd link. Primary and backup links. Determining whether the primary direction of the Lapd has been established, if the chain has been established, step S1106 is performed, otherwise step S1108 is performed; Step S1106: initializing the active link to the active state, and initializing the alternate direction link to the non-working state; S1108: determining whether the standby direction Lapd is built. If the chain is already established, step S1110 is performed, otherwise step S1122 is performed; step S1110: starting timer T1; step S1112: if T1 is in the main direction before L1 is established, Step S1114 is performed, otherwise step S1116 is performed; Step S1114: Killing the timer T1, and initializing the active link to the active state, and initializing the alternate direction link to the non-operating state; Step S1116: Executing the timer T1 For the process of switching from the primary link to the standby link, the link switching process is as follows: Step S1118: The Lapd link in the working state is selected to interact with the BSC to apply for wireless parameter configuration. Step S1120: Receive the BSC delivery The wireless configuration parameters complete the parameter configuration process; Step S1122: End. Step 4: The base station performs an abis port link switching process. Referring to FIG. 12, the BTS will: Step S1202: During the detection process, find that the currently used Lapd (a) link is broken; Step S1204: Determine another link of the Lapd (b), and if the status is normal, perform the steps. S1206, otherwise step S1212 is performed; Step S1206: setting the link to an active state, setting Lapd (a) to a non-operating state; Step S1208: transmitting an access message to the currently connected BSC using Lapd (b); Step S1210 : Re-configure the configuration parameters to the BSC and complete the configuration process; Step S1212: End. In this embodiment, the switching between the media plane and the background maintenance channel is not required, because there is no related configuration. For details, refer to the content of step 2. Step 5: The base station automatically reverts back to the main direction flow. If the base station works in the standby direction and detects that the active direction link has returned to normal, and there is no service currently, the base station will automatically switch to the active direction. Referring to FIG. 13, the BTS will perform the following operations: Step S1302: Set the primary direction Lapd to the active state and the standby direction Lapd to the non-operating state; Step S1304: Send the access message to the currently connected BSC using the primary Lapd. Step S1306: Perform a wireless parameter request to the BSC, and complete the configuration process; Step S1308: End. Based on the same inventive concept, an embodiment of the present invention further provides a link switching apparatus, which is disposed in a base station (BTS), and has a structural schematic diagram as shown in FIG. 14, including: a primary connection module 1401, configured to be connected to a primary base station controller. (BSC) connection, establishing a primary transmission link; a backup connection module 1402, configured to connect with the standby BSC, establishing a backup transmission link; the switching module 1403 is respectively connected with the primary connection module 1401 and the backup connection module 1402, and is set to determine the main The transmission link that is currently working in the transmission link and the backup transmission link fails, and the current service is switched to another transmission link for processing. In an embodiment, as shown in FIG. 15, the link switching device further includes a detecting module 1501, which is respectively connected to the main connecting module 1401 and the standby connecting module 1402, and is configured to switch the current service to the standby transmission link. When processing is performed, no service is detected on the backup transmission link within a preset time, and the primary transmission link can transmit data; the switching module 1403 is connected to the detection module 1501, and is also configured to connect the service on the backup transmission link. Switch back to the main link for processing. Based on the same inventive concept, an embodiment of the present invention further provides a link switching system, which is shown in FIG. 16 and includes a base station (BTS) 1601, a primary base station controller (BSC) 1602, and a standby BSC 1603:

The BTS 1601 is configured to be connected to the primary BSC 1602 to establish a primary transmission link; to connect with the secondary BSC 1603 to establish a secondary transmission link; to determine that the transmission link in the working state is faulty, and to switch the current service to another transmission link. The upper BSC 1602 is set to be connected to the BTS 1601 to establish a primary transmission link, and the secondary BSC 1603 is set to be connected to the BTS 1601 to establish a backup transmission link. In an embodiment, the BTS 1601 is further configured to detect that there is no service on the backup transmission link within a preset time when the current service is switched to the backup transmission link for processing, and the primary transmission link can transmit data. The service on the backup transmission link is switched back to the primary link for processing. From the above description, it can be seen that the present invention achieves the following technical effects: In the embodiment of the present invention, the BTS is connected to the primary BSC to establish a primary transmission link; the BTS is connected to the secondary BSC to establish a secondary transmission link; It is determined that the transmission link currently in the active transmission link and the backup transmission link is faulty, and the current service is switched to another transmission link for processing. That is, in the embodiment of the present invention, one BTS is connected to two BSCs of the primary BSC and the secondary BSC, and the board-level backup of the BTS is implemented, and the backup of the primary and secondary sites is not required, thereby saving operational investment, and further It can improve the disaster tolerance of the BSC level. In addition, the base station works under different BSCs and uses the same frequency point configuration, which can improve the subsequent capacity expansion. Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general-purpose computing device, which can be concentrated on a single computing device or distributed over a network composed of multiple computing devices. Alternatively, they may be implemented by program code executable by the computing device, such that they may be stored in the storage device by the computing device and, in some cases, may be different from the order herein. Perform the steps shown or described, or separate them into individual integrated circuit modules, or Multiple of these modules or steps are fabricated as a single integrated circuit module. Thus, the invention is not limited to any specific combination of hardware and software. The above is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made to the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

Claims

Claim

A link switching method, including:

The base station BTS is connected to the primary base station controller BSC to establish a primary transmission link;

The BTS is connected to the standby BSC to establish a backup transmission link.

The BTS determines that the transmission link currently in the active transmission link and the backup transmission link is faulty, and switches the current service to another transmission link for processing.

The method according to claim 1, wherein, after the BTS establishes the primary transmission link and the backup transmission link, before determining that the transmission link currently in the working state fails, the method further includes:

Determining, by the BTS, a state of the primary transmission link and the secondary transmission link, setting a state of the primary transmission link to an active state, and setting a state of the secondary transmission link to a non-working state; The BTS operates with the primary transmission link in an active state.

The method according to claim 1, wherein the BTS is connected to the primary BSC and the standby BSC, and includes:

The BTS is connected to the main BSC through an abis interface in a primary direction;

The BTS is connected to the standby BSC through a standby abis interface;

The primary transmission link corresponding to the abis interface in the primary direction of the BTS and the secondary transmission link corresponding to the abis interface in the standby direction exist simultaneously.

The method according to claim 3, wherein the BTS determines that the transmission link that is currently in a working state is faulty, and includes:

The BTS periodically detects the status of the primary transmission link and the secondary transmission link; the BTS detects that the transmission link corresponding to the currently used abis interface is disconnected, and determines that the transmission link currently in the working state appears. malfunction.

The method according to claim 1, wherein the transmission link of the BTS that is currently in the working state fails, and the current service is switched to another transmission link for processing, and the method further includes: the BTS synchronous switching Media side channel and background maintenance channel.

The method according to any one of claims 1 to 5, further comprising: When the BTS switches the current service to the backup transmission link for processing, the BTS detects that there is no service on the backup transmission link within a preset time, and the primary transmission link can transmit data; The BTS reverses the service on the backup transmission link back to the primary link for processing.

The method according to claim 3 or 4, wherein before the BTS is connected to the primary BSC and the standby BSC, the method further includes: the BTS setting a Flex abis switch, when the Flex abis switch is turned on The active and standby abis interfaces are used to support the connection between the primary BSC and the standby BSC.

A link switching device, which is disposed in the base station BTS, and includes:

The primary connection module is configured to be connected to the primary base station controller BSC to establish a primary transmission link; and the standby connection module is configured to be connected to the standby BSC to establish a backup transmission link;

The switching module is configured to determine that the transmission link currently in the active transmission link and the standby transmission link is faulty, and switch the current service to another transmission link for processing.

The device according to claim 8, further comprising: a detecting module, configured to detect that the current transmission is not processed on the backup transmission link within a preset time when the current service is switched to the backup transmission link for processing Traffic, and the primary transmission link is capable of transmitting data;

The switching module is further configured to switch the service on the backup transmission link back to the primary link for processing.

10. A link switching system, including a base station BTS, a primary base station controller BSC, and a standby BSC:

The BTS is configured to connect with the primary BSC to establish a primary transmission link; connect with the standby BSC to establish a backup transmission link; determine that the transmission link in the working state is faulty, and switch the current service to another one. Processing on the transmission link;

The primary BSC is configured to be connected to the BTS to establish the primary transmission link, and the standby BSC is configured to be connected to the BTS to establish the secondary transmission link.

The system according to claim 10, wherein the BTS is further configured to detect that there is no service on the backup transmission link within a preset time when the current service is switched to the backup transmission link for processing. And the primary transmission link is capable of transmitting data; and the service on the backup transmission link is switched back to the primary link for processing.