CN118233981A

CN118233981A - RRU link control method, RRU, BBU, electronic equipment and computer readable medium

Info

Publication number: CN118233981A
Application number: CN202211639968.XA
Authority: CN
Inventors: 闫翠翠
Original assignee: ZTE Corp
Current assignee: ZTE Corp
Priority date: 2022-12-20
Filing date: 2022-12-20
Publication date: 2024-06-21
Also published as: WO2024131244A1

Abstract

The disclosure provides a link control method for a remote radio unit, an RRU, a BBU, an electronic device and a computer readable medium. The link control method of the remote radio unit is used for remote radio unit RRU and comprises the following steps: transmitting first reverse control information to a primary baseband unit (BBU), so that the primary BBU transmits the first reverse control information to a standby BBU to transmit the first reverse control information, wherein the first reverse control information comprises information required by establishing a signaling link between the RRU and the standby BBU; and receiving second reverse control information sent by the main BBU, wherein the second reverse control information comprises information required by the standby BBU and the RRU to establish a signaling link.

Description

RRU link control method, RRU, BBU, electronic equipment and computer readable medium

Technical Field

The present disclosure relates to the field of communications, and in particular, to a link control method of a remote radio unit RRU (Radio Remote Unit), an RRU, a baseband unit BBU, an electronic device, and a computer readable medium.

Background

A distributed base station generally refers to a networking architecture that is distributed by BBU and RRU. In general, for example, a public network generally adopts a deployment mode of BBU+RRU, and for networks related to public safety, safe operation and safe production, for example, a railway private network is used for railway command and dispatch, and the networks are more reliable and controllable in the field of enterprises (toB), such as mineral products and steel, and cannot be recovered in a short time under the situations of power failure and faults of a single BBU, so that the operation and production requirements of the private network are not met.

Disclosure of Invention

The present disclosure provides an RRU link control method, RRU, BBU, electronic device, and computer readable medium.

In a first aspect, the present disclosure provides a link control method for a remote radio unit, RRU, for a remote radio unit, including:

Transmitting first reverse control information to a primary baseband unit (BBU) so that the primary BBU transmits the first reverse control information to a standby BBU, wherein the first reverse control information comprises information required for establishing a signaling link between the RRU and the standby BBU;

And receiving second reverse control information sent by the main BBU, wherein the second reverse control information comprises information required by the standby BBU and the RRU to establish a signaling link.

Further, the current primary BBU is the first BBU, the current standby BBU is the second BBU,

In the case that the primary-standby switching occurs between the first BBU and the second BBU, the method further comprises:

And establishing a signaling link with the second BBU by utilizing the first reverse control information and the second reverse control information.

In some embodiments, the first reverse control information includes delay component data for calculating forward measurement data and reverse measurement data, which is detected by the RRU itself after the establishment of the upper layer communication link is confirmed; the second reverse control information comprises reverse delay compensation data calculated according to the delay component data and reverse link measurement data, wherein the reverse link measurement data is delay data measured on a link which does not pass through the main BBU between the standby BBU and the RRU.

In some embodiments, the sending the first reverse control information to the primary baseband unit BBU includes:

and transmitting the first reverse control information to the standby BBU to the main BBU through a signaling link between the main BBU and the standby BBU.

In some embodiments, the destination address of the first reverse control information is a standby BBU, and the gateway address of the RRU is a primary BBU.

In some embodiments, the method further comprises:

deleting a signaling link between the BBU and the BBU which sends the standby identification under the condition of receiving the standby identification;

and when the primary identifier is received, taking the BBU which sends the primary identifier as a new primary BBU.

In a second aspect, the present disclosure provides a link control method of a remote radio unit, for a baseband unit, including:

receiving first reverse control information, wherein the first reverse control information comprises information required for establishing a signaling link between a remote radio unit RRU and a standby baseband unit BBU;

transmitting the first reverse control information to the standby BBU;

Receiving second reverse control information, wherein the second reverse control information comprises information required by the standby BBU and the RRU to establish a signaling link;

and sending the second reverse control information to the RRU.

In some embodiments, the receiving the first reverse control information includes:

receiving the first reverse control information sent by the RRU to the standby BBU through a signaling link between the RRU and the RRU;

said sending said first reverse control information to the corresponding spare BBU comprises:

And sending the first reverse control information to the standby BBU through a heartbeat link between the standby BBU and the standby BBU.

In some embodiments, the receiving the second reverse control information includes:

Receiving the second reverse control information sent by the standby BBU to the RRU through a heartbeat link between the standby BBU and the standby BBU;

the sending the second reverse control information to the RRU includes:

and sending the second reverse control information to the RRU through a signaling link between the RRU and the RRU.

In some embodiments, the method further comprises:

in response to receiving the fault message, judging whether the current main BBU and the standby BBU meet the main/standby switching condition;

and under the condition that the main/standby switching condition is met, sending a main/standby switching notification to the current standby BBU.

In some embodiments, in the event that the current active BBU switches to a standby state, the method further comprises:

Recording all RRUs as standby states;

and sending the standby identification to all RRUs.

In a third aspect, the present disclosure provides a link control method of a remote radio unit, for a baseband unit, including:

Receiving first reverse control information sent by a main baseband unit BBU, wherein the first reverse control information comprises information required for establishing a signaling link between a remote radio unit RRU and a standby BBU;

And sending second reverse control information to the main BBU, so that the main BBU sends the second reverse control information to the RRU, wherein the second reverse control information comprises information required by the standby BBU and the RRU to establish a signaling link.

In some embodiments, the current BBU is in a standby state, and the method further comprises:

and under the condition that the current main BBU and the current standby BBU are subjected to main-standby switching, establishing a signaling link with the RRU by utilizing the first reverse control information and the second reverse control information.

In some embodiments, the first reverse control information includes delay component data for calculating forward measurement data and reverse measurement data, which is detected by the RRU itself after the establishment of the upper layer communication link is confirmed; the second reverse control information comprises reverse delay compensation data calculated according to the delay component data and reverse link measurement data, wherein the reverse link measurement data is delay data measured on a link which does not pass through the main BBU between the current BBU and the RRU.

In some embodiments, the sending the second reverse control information to the primary BBU comprises:

and sending the second reverse control information to the RRU to the main BBU through a heartbeat link between the main BBU and the main BBU.

In some embodiments, the destination address of the second reverse control information is the RRU, and the gateway address of the current BBU is the primary BBU.

In some embodiments, in the event that the current BBU switches to the active state, the method further comprises:

recording all RRUs as a main state;

And sending the main identification to all RRUs.

In a fourth aspect, the present disclosure provides a remote radio unit, comprising:

one or more processors;

a memory having one or more programs stored thereon, which when executed by the one or more processors cause the one or more processors to implement the method of controlling a link of a remote radio unit according to any one of the first aspects;

One or more I/O interfaces coupled between the processor and the memory configured to enable information interaction of the processor with the memory.

In a fifth aspect, the present disclosure provides a baseband unit, including:

one or more processors;

A memory having one or more programs stored thereon, which when executed by the one or more processors, cause the one or more processors to implement the method of controlling a link of a remote radio unit according to any one of the second or third aspects;

In a sixth aspect, the present disclosure provides an electronic device, comprising:

one or more processors;

A memory having one or more programs stored thereon, which when executed by the one or more processors, cause the one or more processors to implement the method of controlling a link of a remote radio unit according to any one of the first to third aspects;

In a seventh aspect, the present disclosure provides a computer readable medium having stored thereon a computer program which, when executed by a processor, implements a method of controlling a link of a remote radio unit according to any one of the first to third aspects.

According to the RRU link control method, a virtual link is established between the RRU and the standby BBU by utilizing the signaling link between the RRU and the main BBU and the heartbeat link between the main BBU and the standby BBU, information required by the signaling link established between the RRU and the standby BBU is transferred in advance, and when the main BBU and the standby BBU are subjected to main/standby switching, the signaling link is quickly established between the RRU and the standby BBU (namely, the new main BBU), so that the quick switching of RRU service is realized, the fault recovery time is greatly shortened, and the stability and the reliability of a network are improved.

Drawings

Fig. 1 is a flowchart of an RRU link control method provided in an embodiment of the present disclosure.

Fig. 2 is a flowchart of another RRU link control method according to an embodiment of the present disclosure.

Fig. 3 is a flowchart of an RRU link control method provided in an embodiment of the present disclosure.

Fig. 4 is a flowchart of another RRU link control method provided by an embodiment of the present disclosure.

Fig. 5 is a flowchart of another RRU link control method provided by an embodiment of the present disclosure.

Fig. 6 is a flowchart of an RRU link control method provided in an embodiment of the present disclosure.

Fig. 7 is a flowchart of another RRU link control method provided by an embodiment of the present disclosure.

Fig. 8 is a schematic diagram of a BBU redundancy backup ring networking architecture.

Figure 9 is a schematic diagram of RRU functional modules.

Fig. 10 is a schematic diagram of main identification direction link establishment provided in an embodiment of the present disclosure.

Fig. 11 is a schematic view of a virtual link provided by an embodiment of the present disclosure.

FIG. 12 is a schematic of the steps of example 1.

Fig. 13 is a schematic diagram of a failure scenario of the BBU redundancy backup ring network of embodiment 2.

Fig. 14 is a schematic diagram of an electronic device provided in an embodiment of the disclosure.

Fig. 15 is a schematic diagram of a computer-readable medium provided by an embodiment of the present disclosure.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and are not intended to limit the present disclosure.

In the following description, suffixes such as "module", "component", or "unit" for representing elements are used only for facilitating the description of the present disclosure, and have no particular meaning in themselves. Thus, "module," "component," or "unit" may be used in combination.

The prior distributed networking scheme of the Railway integrated digital mobile communication system (GSM-R, global System for Mobile Communications-Railway) adopts a single BBU single board redundancy backup+RRU annular networking scheme. The scheme can not avoid single-point faults generated by natural disasters, faults and power failure of the BBU machine frame. Therefore, when the GSM-R evolves to a 5G-based railway mobile communication private network (5G-R), a double BBU redundancy backup remote disaster recovery networking is provided (namely, a group of RRUs are connected to two BBUs according to a chain networking structure, but only one BBU provides service at a time). The RRU is limited by the capability of a chip, and can only establish an operation maintenance link (also called a signaling link) with the BBU in one optical port direction, how to manage the links between the RRU and the two BBUs, and how to reduce the influence of faults to ensure the maximum coverage capability when the optical fiber breaks down are a key problem of the networking. In order to reduce the fault recovery time, the RRU needs to acquire the key data of the standby BBU in advance, so that when the main and standby states of the dual BBUs are switched, the fault duration is shortened as much as possible, and the key index is also a key index for checking the reliability of the network.

The inventor of the present disclosure has found that, in general, an optical fiber connection, i.e., an open IR (Interface between the RRU and the BBU) interface, is used between the BBU and the RRU to define an interface requirement and an operation maintenance requirement. However, the RRU link management method under the dual BBU is not defined, and needs to be redesigned based on the characteristics of the IR interface, the networking characteristics of the dual BBU, and the requirement of high reliability of the client. The current common practice is: still dispose the primary and secondary relation for BBU machine frame, when the primary and secondary relation of BBU is switched, RRU needs to switch signaling link first, set up signaling link with new primary BBU machine frame again. And then, re-reporting the RRU component time delay is executed, and the RRU time delay precompensation data is obtained after the time delay calculation of the new main direction. In this way, the recovery of traffic is dependent on the re-establishment of the RRU signaling link, undoubtedly increasing the failure recovery time.

Aiming at the problem that the current main/standby BBU switching process is too long, the present disclosure proposes a scheme for pre-establishing a logical signaling virtual link between the standby BBU and the RRU, when the switching does not occur, necessary information required for establishing the signaling link between the standby BBU and the RRU is collected, and when the switching occurs, the signaling link between the new main BBU and the RRU can be quickly established by utilizing the existing information, thereby greatly shortening the fault recovery time.

In a first aspect, an embodiment of the present disclosure provides a link control method for a remote radio unit RRU, as shown in fig. 1, where the link control method for the remote radio unit RRU includes the following steps:

in step S110, first reverse control information is sent to a primary baseband unit BBU, so that the primary BBU sends the first reverse control information to a standby BBU, where the first reverse control information includes information required for establishing a signaling link between the RRU and the standby BBU;

In step S120, second reverse control information sent by the primary BBU is received, where the second reverse control information includes information required for the standby BBU to establish a signaling link with the RRU.

In the traditional BBU redundant backup networking, the RRU only establishes a signaling link with the main BBU at the same time, but not with the standby BBU, so that the RRU needs to switch the signaling link first in the BBU main/standby switching process, establish the signaling link with a new main BBU machine frame again, then execute the re-report of the RRU component time delay, obtain multiple operations such as RRU time delay precompensation data after the time delay calculation of the new main direction, and the like, thereby leading to the service recovery to be dependent on the re-establishment of the RRU signaling link and prolonging the fault recovery time.

In the embodiment of the disclosure, although no physical signaling link is established between the RRU and the standby BBU, a logical virtual link is formed by means of the existing signaling link and the heartbeat link, data of the established signaling link is prepared in advance by transmitting the data between the RRU and the standby BBU through the virtual link, the work of measuring time delay component data, calculating time delay compensation data and the like between the RRU and the standby BBU is finished in advance, and therefore the quick link establishment in the main/standby switching process of the BBU is realized, and the recovery time is shortened.

It should be noted that, in order to distinguish various data information between the RRU and the primary BBU, various data information between the RRU and the standby BBU is referred to as "reverse", such as reverse control information, reverse delay, etc., in this disclosure, all represent data information between the RRU and the standby BBU.

As shown in fig. 8, in the dual BBU redundancy backup networking of the embodiment of the present disclosure, a group of multiple RRUs are connected by an optical fiber link, and are bridged between the optical interface unit 1 of the BBU chassis 1 and the optical interface unit 2 of the BBU chassis 2, and each RRU is independent. And transmitting heartbeat link protocol messages between the two BBU machine frames through a heartbeat link so as to maintain the main and standby states of the two BBUs and form redundant backup. Thus, a ring network is formed by the physical links between the BBUs and the RRUs, the physical links between the multiple RRUs, and the heartbeat links between the BBUs.

It should be noted that, multiple sets of RRUs may be connected between two BBU frames, that is, each set of RRUs is connected to multiple RRUs through an optical fiber chain, and each set of RRUs is connected in parallel between two BBU frames.

As shown in fig. 9, the functional module units on the RRU may include, but are not limited to: the system comprises a first optical interface unit, a second optical interface unit and a link management unit. The first optical interface unit is connected with the BBU machine frame 1 (or connected with the BBU machine frame 1 through other RRUs) and executes an IR interface protocol; the second optical interface unit is connected with the BBU machine frame 2 (or connected with the BBU machine frame 2 through other RRUs) and executes an IR interface protocol; the link management unit is responsible for completing the establishment and release of a signaling link with the main BBU machine frame, wherein the signaling link is a real link. In the present disclosure, the link management unit is also responsible for establishing and releasing a virtual link with the standby BBU chassis, and data transmitting and receiving operations, and during data transmission, a signaling link established with the main BBU chassis is selected, and the transmitted data includes delay component data sent by the RRU to the standby BBU, and RRU delay compensation data from the standby BBU chassis is received.

The BBU can identify the status of "primary/standby," the redundant backup mode of the BBU, and the IP addresses of the redundant BBUs, and establish IP and above communication links between the two BBUs. The optical interface units of the two BBUs acquire the main/standby states of the BBU machine frame, the BBU redundancy backup mode and the RRU networking structure, wherein the RRU networking structure comprises optical port information of a ring and RRU identity information of each stage. The optical interface unit 1 of the BBU chassis 1 sends a "master" physical control word and the optical interface unit 2 of the BBU chassis 2 sends a "standby" control word.

And each RRU on the ring network selects the direction of the main physical control word according to the received physical control word, sets an optical interface unit in the corresponding direction as a route, and completes the establishment of a signaling link with the main BBU.

It should be noted that the virtual link described in this disclosure is a logical virtual signaling link, and functions to transfer data between the RRU and the spare BBU. In the present disclosure, the concrete expression form of the virtual link is not excessively limited, and may be represented as a series of configurations on the RRU and the BBU; the data between the RRU and the spare BBU may be transferred by using the existing link, that is, the data is transferred between the primary BBU and the spare BBU through the heartbeat link, and the data is transferred between the primary BBU and the RRU through the signaling link, as shown in fig. 11, so long as the data transfer between the RRU and the spare BBU can be realized, without explicitly configuring the virtual link.

Corresponding to the virtual link is a reverse link. The reverse link is the link between the RRU and the standby BBU, through which a new signaling link can be established between the RRU and the new primary BBU after the primary and standby BBUs are switched. That is, the virtual link is to transfer data between the RRU and the standby BBU by the primary BBU, and the reverse link is a backup link which does not pass through the primary BBU, so as to prepare for establishing the signaling link after switching. Therefore, in the case that the primary-standby BBU handover does not occur, measurement of the reverse link between the RRU and the standby BBU needs to be performed in advance, and reverse link measurement data is transferred to each other through the virtual link between the RRU and the standby BBU.

Taking the ring networking of fig. 8 as an example, the virtual link between RRU1 and BBU frame 2 is RRU 1-BBU frame 2, and the reverse link between RRU1 and BBU frame 2 is RRU 1-RRU 2-RRU 3-BBU frame 2.

In order to realize the function of transferring data between the RRU and the standby BBU through the virtual link, the main BBU plays a role in transferring data protocol conversion and forwarding between the RRU and the standby BBU. The primary BBU can be directly configured as a gateway in the configuration of the RRU and the standby BBU, and the gateway has the function of not processing user data and is focused on protocol conversion and forwarding; the gateway is not required to be arranged, and the purpose of helping the main BBU to transfer messages between the standby BBU and the RRU is realized through the matching of message or data packet identification, packaging, forwarding mechanisms and the like of the main BBU.

In the conventional BBU redundancy backup networking, the RRU and the spare BBU do not send information required for establishing the signaling link to each other. In order to distinguish the link control information between the RRU and the primary BBU, in the present disclosure, information required for establishing a signaling link between the RRU and the primary BBU is referred to as reverse control information, reverse control information sent by the RRU to the standby BBU is referred to as first reverse control information, and reverse control information sent by the standby BBU to the RRU is referred to as second reverse control information.

The RRU sends the first reverse control information to the main BBU, so that the main BBU forwards the first reverse control information to the standby BBU after performing heartbeat link protocol conversion; the standby BBU sends the second reverse control information to the main BBU, and the main BBU forwards the second reverse control information to the RRU after performing signaling link protocol conversion. Through bidirectional information interaction between the RRU and the standby BBU, preparation for establishing a new signaling link in the main/standby switching at any time can be prepared in advance. After the method disclosed by the invention is used, the switching time of the main BBU and the standby BBU can be shortened from the minute level to the second level in the traditional mode.

Further, the current primary BBU is a first BBU, the current standby BBU is a second BBU, and in the case that the primary-standby switching occurs between the first BBU and the second BBU, the method further includes:

Because the measurement of the time delay assembly data between the RRU and the standby BBU, the measurement of the reverse link time delay, the calculation of the time delay compensation data and the like are finished in advance, the data for establishing the signaling link are prepared in advance, so that the RRU can establish a new signaling link with the standby BBU in a shorter time, and the recovery time of main-standby switching is greatly shortened.

Before the switching of the main BBU and the standby BBU occurs, the time delay measurement work between the RRU and the standby BBU is finished in advance.

It should be noted that "the establishment of the upper layer communication link is completed" refers to that the establishment of the communication link between the RRU and the main BBU is completed.

And the RRU utilizes an established signaling link with the main BBU to report RRU delay component data to an optical interface unit of the main BBU. The optical interface unit of the main BBU is provided with delay component data of the RRU at the moment and is used for measuring and calculating delay compensation data of the RRU, the main BBU stores and sends the delay compensation data to the RRU through an established signaling link, and the RRU takes effect on the delay compensation data.

In the related art, there is no signaling link between the RRU and the standby BBU, and delay component data cannot be sent to the standby BBU in advance, and delay measurement without passing through the reverse link of the main BBU cannot be performed between the standby BBU and the RRU in advance. Because the embodiment of the disclosure establishes the virtual link between the standby BBU and the RRU, the RRU transmits RRU delay component data to the standby BBU by using the virtual link established with the standby BBU. The standby BBU sends the delay component data to the optical interface unit of the frame, and the optical interface unit of the standby BBU has the delay component data of each RRU reported by the virtual link, is used for measuring and calculating the result of the RRU reverse delay compensation data in the reverse link direction, and stores the result. The standby BBU utilizes a virtual link between the standby BBU and the RRU to send reverse delay compensation data to the RRU. The RRU is stored in the standby area and activated when the RRU is to be switched, so that the time for measuring the time delay between the RRU and the new main BBU is saved.

It should be noted that, in the present disclosure, the normal data transmission and the transmission of the service data before the RRU and the main BBU are not affected while the reverse control information is transferred through the virtual link. The reverse control information in the present disclosure includes, but is not limited to, reverse delay component data and reverse delay compensation data, and may also include operation status information, service information, etc. of the BBU and the RRU.

As described above, the virtual link may transfer data between the RRU and the spare BBU by using the existing link, that is, transfer data between the primary BBU and the spare BBU through the heartbeat link, and transfer data between the primary BBU and the RRU through the signaling link, so as to implement data interaction between the RRU and the spare BBU.

In order to realize the function of transferring data between the RRU and the standby BBU through the virtual link, the main BBU plays a role in transferring data protocol conversion and forwarding between the RRU and the standby BBU. The primary BBU can be directly configured as a gateway in the configuration of the RRU and the standby BBU, and the gateway has the function of not processing user data and is focused on protocol conversion and forwarding. For example, the IP address of the primary BBU is set on the spare BBU as a communication gateway to the RRU, and the IP address of the primary BBU is set on the RRU as a communication gateway to the spare BBU.

The gateway is not required to be arranged, and the purpose of helping the main BBU to transfer messages between the standby BBU and the RRU is realized through the matching of message or data packet identification, packaging, forwarding mechanisms and the like of the main BBU. After a signaling link between the main BBU and the RRU is established and a heartbeat link between the BBUs is established, the main BBU has an IP address of the standby BBU, after the RRU obtains the IP of the standby BBU through the main BBU, the uplink direction can be marked by time delay component data sent by the RRU to the standby BBU, and the main BBU repacks and forwards the data packet or the message to the standby BBU through the heartbeat link after the data packet or the message to the standby BBU is identified by unpacking the data packet or the message. In the downlink direction, the data of the RRU sent by the standby BBU can be identified in the data packet or the message number, and after the primary BBU identifies the data packet or the message sent by the standby BBU to the RRU through analyzing the data packet or the message, the data packet or the message is repackaged through a signaling link between the primary BBU and the RRU and then is forwarded to the RRU. In this way, it is not identified by the transmission address, but by the packet or message number. The difference in processing is whether packet parsing or message identification operations are required.

And in the uplink direction, after the main BBU receives the link message of the RRU, if the destination address is judged to be in the direction of the standby BBU, the established heartbeat link is selected, and the IP message is forwarded to the standby BBU after being converted through the inter-frame heartbeat link protocol. In the downlink direction, if the main BBU receives a message sent to the RRU by the RRU link management unit of the standby BBU through the heartbeat link, the signaling link established with the RRU is selected, the IP message is subjected to signaling link protocol conversion, and then the signaling link protocol conversion is forwarded to the corresponding RRU.

The switching of the primary BBU and the standby BBU triggers the switching of the primary state and the standby state of the two BBUs, and simultaneously informs the related RRUs of synchronously updating the states. If the old main BBU still works, the standby identification is sent to all RRUs. The new main BBU sends main identification to all RRUs, and the RRU establishes signaling link with the new main BBU. In some embodiments, as shown in fig. 2, the method further comprises:

In step S131, in the case of receiving the backup identifier, deleting a signaling link with the BBU that sent the backup identifier;

in step S132, when the primary identifier is received, the BBU from which the primary identifier is sent is taken as a new primary BBU.

The RRU receives the standby identification from the old main BBU, triggers the deletion of a signaling link between the RRU and the old main BBU, sets an interface for receiving the standby identification as a standby BBU interface, and simultaneously returns an RRU confirmation identification; and when receiving the main identification from the new main BBU, establishing a signaling link with the new main BBU, setting an interface receiving the main identification as the main BBU interface, taking the interface as the direction of establishing the new signaling link, and simultaneously returning the RRU confirmation identification. After the switching of the main BBU and the standby BBU is completed, the RRU can also build a virtual link with the new standby BBU, transfer data required by the establishment of a signaling link, and prepare for the next main BBU reverse.

In a second aspect, an embodiment of the present disclosure provides a link control method of a remote radio unit, which is used for a baseband unit BBU, as shown in fig. 3, where the link control method of the remote radio unit includes the following steps:

in step S210, first reverse control information is received, where the first reverse control information includes information required for establishing a signaling link between the remote radio unit RRU and the standby baseband unit BBU;

in step S220, sending said first reverse control information to said spare BBU;

in step S230, second reverse control information is received, where the second reverse control information includes information required for the standby BBU to establish a signaling link with the RRU;

in step S240, the second reverse control information is sent to the RRU.

Still taking fig. 8 as an example, in the dual BBU redundancy backup networking of the embodiment of the disclosure, a group of multiple RRUs are connected by an optical fiber link, and bridge-connected between the optical interface unit 1 of the BBU chassis 1 and the optical interface unit 2 of the BBU chassis 2, where each RRU is independent. And transmitting heartbeat link protocol messages between the two BBU machine frames through a heartbeat link so as to maintain the main and standby states of the two BBUs and form redundant backup. Thus, a ring network is formed by the physical links between the BBUs and the RRUs, the physical links between the multiple RRUs, and the heartbeat links between the BBUs.

Each RRU is physically connected with the optical interface modules in 2 directions at the same moment, and the bottom data communication is kept; each RRU can only establish an operation maintenance link (also called a signaling link) at the same time on an optical interface in one direction.

Functional module elements on the BBU include, but are not limited to: and the heartbeat management unit and the RRU link management unit.

And the heartbeat management unit is responsible for completing the establishment, release and keep-alive of the heartbeat links of the frame BBU and the opposite frame BBU and transmitting RRU delay component data and RRU delay compensation data.

And the RRU link management unit is responsible for completing the operations of establishing and releasing a signaling link between the RRU and the RRU, protocol conversion, data forwarding and the like when the BBU machine frame is used as a main use. In the process of establishing a signaling link, an optical interface unit of the frame is required to be set as a route for communication with the RRU, and when data sent to a standby BBU machine frame by the RRU is received, the BBU and RRU data packet protocol conversion is completed, and the data packet protocol is converted into a heartbeat link data protocol and is forwarded to the standby BBU; when receiving the data sent by the standby BBU to the RRU, the data is converted into a signaling link protocol between the BBU and the RRU and sent to the RRU.

When BBU is switched to a standby frame, the refreshing action of route and network management configuration is required to be completed, the unit is required to delete the route configuration of the frame and the optical interface unit, refresh the gateway, complete the establishment of a virtual link between the gateway and RRU and is responsible for transmitting RRU delay component data and RRU delay compensation data.

In order to realize the function of transferring data between the RRU and the standby BBU through the virtual link, the main BBU plays a role in transferring data protocol conversion and forwarding between the RRU and the standby BBU. The primary BBU can be directly configured as a gateway in the configuration of the RRU and the standby BBU, and the purpose that the primary BBU helps to transfer messages between the standby BBU and the RRU can be realized through the matching of message or data packet identification, packaging, forwarding mechanisms and the like of the primary BBU.

The RRU sends the first reverse control information to the main BBU, the main BBU receives the first reverse control information, and the main BBU forwards the first reverse control information to the standby BBU after performing heartbeat link protocol conversion; the standby BBU sends the second reverse control information to the main BBU, and the main BBU forwards the second reverse control information to the RRU after performing signaling link protocol conversion. Through bidirectional information interaction between the RRU and the standby BBU, preparation for establishing a new signaling link in the main/standby switching at any time can be prepared in advance.

Specifically, in some embodiments, the receiving the first reverse control information includes:

the sending the second reverse control information to the RRU includes:

In some embodiments, as shown in fig. 4, the method further comprises:

In step S250, in response to receiving the fault message, it is determined whether the current primary BBU and the standby BBU meet the primary-standby switching condition;

In step S260, if the active/standby switching condition is satisfied, a notification of active/standby switching is sent to the current standby BBU.

And on the BBU equipment, the health degree detection is executed regularly or triggered by a fault event, and whether the switching of the main BBU and the standby BBU is needed is judged according to the result of the health degree detection. Some health degree detection rules and corresponding detection indexes can be preset, and the main/standby switching is decided to be executed under the condition that the health degree detection result meets the main/standby switching condition through judging strategies or scoring standards. The old primary BBU is switched to the standby state, and the old standby BBU is switched to the primary state. For example, through physical link detection, a link of the main BBU to the 5G core network (5GC,5G Core Network) through the NG interface is used as an index of health detection, when the link fails, the two BBUs negotiate and judge through a preset health detection rule, and it is determined that the BBU1 cannot provide a service, and the main BBU and the standby BBU are triggered to enter a switching flow. The BBU1 is switched to standby, and a switching judgment unit of the BBU1 sets a frame identifier as standby; the BBU2 is switched to the main, and the BBU2 switching judgment unit sets the frame identifier as the main.

It should be noted that, the source of the fault message is not limited in the present disclosure, and may be a message generated after the BBU detects and discovers the fault by itself, or may be a fault message received from other devices; the type of failure is not limited, and may include, but is not limited to, whether a link failure or a port failure, and may be related to health detection rules.

In some embodiments, as shown in fig. 5, in the case where the current active BBU switches to the standby state, the method further includes:

In step S271, all RRUs are recorded as standby;

In step S272, the standby identities are sent to all RRUs.

The RRU receives the standby identification from the old main BBU and triggers the deletion of a signaling link between the RRU and the old main BBU; and after receiving the main identification from the new main BBU, a signaling link is established with the new main BBU to realize service switching. After the switching is completed, the RRU can also build a virtual link with the new standby BBU, transfer data required for building a signaling link, and prepare for the next primary and standby BBU inversion in advance.

In a third aspect, the present disclosure provides a link control method for a remote radio unit, which is used for a baseband unit BBU, as shown in fig. 6, and includes the following steps:

In step S310, first reverse control information sent by a primary baseband unit BBU is received, where the first reverse control information includes information required for establishing a signaling link between a remote radio unit RRU and a standby BBU;

In step S320, second reverse control information is sent to the primary BBU, so that the primary BBU sends the second reverse control information to the RRU, where the second reverse control information includes information required for the standby BBU to establish a signaling link with the RRU.

And when the BBU machine frame is standby, the RRU link management unit is responsible for establishing and releasing a virtual link between the RRU and transmitting data. In the virtual link establishment process, the IP address of the main BBU can be set as a gateway, and after the virtual link is established, the virtual link is responsible for transmitting RRU delay component data and RRU delay compensation data. When the BBU frame is switched to be the main one, the RRU link management unit deletes the gateway configuration, sets the optical interface unit of the frame as the route for communication with the RRU, completes the establishment of the signaling link between the main BBU and the standby BBU and the RRU, and is responsible for protocol conversion and data forwarding operation. When receiving data sent by the RRU to the standby BBU machine frame, completing the protocol conversion between the BBU and the RRU data packet, converting the data packet into a heartbeat link data protocol, and forwarding the heartbeat link data protocol to the standby BBU; when receiving the data sent by the standby BBU to the RRU, the data is converted into a signaling link format between the BBU and the RRU and sent to the RRU.

The RRU sends the first reverse control information to the main BBU, and the main BBU forwards the first reverse control information to the standby BBU after performing heartbeat link protocol conversion; the standby BBU sends the second reverse control information to the main BBU, so that the main BBU carries out signaling link protocol conversion on the second reverse control information and then forwards the second reverse control information to the RRU. Through bidirectional information interaction between the RRU and the standby BBU, preparation for establishing a new signaling link in the main/standby switching at any time can be made in advance, and after the method disclosed by the invention is used, the main/standby BBU switching time can be shortened from the minute level to the second level in the traditional mode.

Because the work of measuring the time delay assembly data, calculating the time delay compensation data and the like between the RRU and the standby BBU is finished in advance, and the data for establishing the signaling link are prepared in advance, the RRU can establish a new signaling link with the standby BBU in a shorter time, and the recovery time of main-standby switching is greatly shortened.

In some embodiments, the first reverse control information includes delay component data for calculating forward measurement data and reverse measurement data detected by the RRU itself after the establishment of the upper layer communication link is confirmed; the second reverse control information comprises reverse delay compensation data calculated according to the delay component data and reverse link measurement data, wherein the reverse link measurement data is delay data measured on a link which does not pass through the main BBU between the current BBU and the RRU.

The embodiment of the disclosure establishes a virtual link between the standby BBU and the RRU, so that the RRU transmits RRU delay component data to the standby BBU by using the virtual link established with the standby BBU. The standby BBU sends the delay component data to the optical interface unit of the frame, and the optical interface unit of the standby BBU has the delay component data of each RRU reported by the virtual link, is used for measuring and calculating the result of the RRU reverse delay compensation data in the reverse link direction, and stores the result. The standby BBU utilizes a virtual link between the standby BBU and the RRU to send reverse delay compensation data to the RRU. The RRU is stored in the standby area and activated when the RRU is to be switched, so that the time for measuring the time delay between the RRU and the new main BBU is saved.

In order to realize the function of transferring data between the RRU and the standby BBU through the virtual link, the main BBU plays a role in transferring data protocol conversion and forwarding between the RRU and the standby BBU. The primary BBU can be directly configured as a gateway in the configuration of the RRU and the standby BBU, and the purpose that the primary BBU helps to transfer messages between the standby BBU and the RRU can be realized through the matching of message or data packet identification, packaging, forwarding mechanisms and the like of the primary BBU. Taking a gateway configuration mode as an example, the IP address of the main BBU is set on the standby BBU as a communication gateway to the RRU, and the IP address of the main BBU is set on the RRU as a communication gateway to the standby BBU.

When the condition of main/standby switching is satisfied, the old main BBU is switched to the standby state, and the old standby BBU is switched to the main state.

In some embodiments, as shown in fig. 7, in the case where the current BBU is switched to the active state, the method further comprises:

in step S331, recording all RRUs as a master state;

In step S332, the primary identifier is sent to all RRUs.

The RRU receives the standby identification from the old main BBU and triggers the deletion of a signaling link between the RRU and the old main BBU; and receiving the primary identification from the new primary BBU and returning the RRU confirmation identification. The new main BBU uses the interface receiving the returned RRU confirmation identification as the direction of establishing the new signaling link, and establishes the signaling link with the RRU to realize the service switching. After the switching of the main BBU and the standby BBU is completed, the RRU can also build a virtual link with the new standby BBU, transfer data required by the establishment of a signaling link, and prepare for the next main BBU reverse.

It should be noted that, only a feasible example is illustrated herein, and is not intended to limit the disclosure, and the processing of each RRU after the switching of the primary and standby BBUs may be different according to the actual situation.

The specific application of the RRU link control method described in the first to third aspects of the present disclosure in BBU redundancy backup networking is described below with reference to 2 embodiments.

Example 1

As shown in fig. 12, the cooperation flow between each BBU and RRU in the BBU redundancy backup network mainly includes the following steps:

First, a heartbeat link between the double BBUs is established.

The BBU can identify the status of primary/standby, the redundant backup mode of the BBU and the IP of the redundant BBU, and communication links between the two BBUs can be established.

And secondly, issuing the BBU master-slave configuration parameters.

The identity information identified by any RRU on the two BBUs is consistent, and the IP addresses of the constructed RRUs are completely consistent.

Generating the total number of RRUs and setting the number identification of the effective links of the RRUs by taking an optical port as a unit according to the networking information of the ring network by the BBU machine frame 1, and initializing to 0; and transmitting networking structure information to the optical interface unit 1, wherein the networking structure information is a 'primary (or standby) identifier', 'BBU redundant networking identifier' and an RRU identity identifier on a loop, and the RRU identity identifier is used for distinguishing different RRUs.

And thirdly, establishing a signaling link between the RRU and the main BBU.

When the optical interface unit receives networking information and judges a 'BBU redundancy networking' mode, the optical interface unit uses RRUs on an optical port as basic units, arranges all RRU identity identifiers in networking structure information, sets the RRU identity identifiers to be in a 'main' state, and initializes the number of effective links to 0; and sending a main identifier and a double BBU networking identifier to all RRUs on the chain through a bottom layer communication data packet, wherein the identifiers are derived from the main identifier and the BBU redundancy networking of networking information.

As shown in fig. 10, the RRU receives the "primary identification" from the primary BBU direction and the "backup identification" from the backup BBU direction. After receiving the communication data packet at the bottom layer, the RRU selects the direction of establishing a signaling link with the optical interface module in the direction of the main identifier, and returns an RRU confirmation identifier. The main BBU/RRU sets the optical interface unit of the main direction as a route to complete the establishment of the signaling link with the RRU.

Fourth, RRU and standby BBU signaling virtual link maintenance.

The virtual link is divided into two sections, namely a signaling link between the main BBU and the RRU and a heartbeat link between the main BBU and the standby BBU.

The RRU link management unit of the standby BBU sets the IP address of the main BBU as a communication gateway to the RRU. The RRU link management unit sets the IP address of the main BBU as a communication gateway to the standby BBU.

And in the uplink direction, after the RRU link management unit of the main BBU receives the link message of the RRU, judging that the destination address is the direction of the standby BBU, selecting an established heartbeat link, converting the IP message into an inter-frame heartbeat link protocol format, and forwarding the IP message to the standby BBU.

In the downlink direction, when the RRU link management unit of the main BBU receives the message of the RRU link management unit of the standby BBU, the signaling link established with the RRU is selected, the IP message is converted into a signaling link format between the BBU and the RRU, and the signaling link format is forwarded to the corresponding RRU.

And fifthly, calculating and issuing reverse delay data.

And the RRU transmits RRU delay component data to the standby BBU by using the virtual link established with the standby BBU. The standby BBU sends the delay component data to the optical interface unit of the frame, and the optical interface unit of the standby BBU has the delay component data of each RRU reported by the virtual link, is used for measuring and calculating the result of the RRU reverse delay compensation data in the reverse link direction, and stores the result. The standby BBU utilizes a virtual link between the standby BBU and the RRU to send reverse delay compensation data to the RRU. The RRU is stored in the standby area and activated when the RRU is to be switched, so that the time for measuring the time delay between the RRU and the new main BBU is saved.

And sixthly, switching the BBU master and slave.

And (3) between the two BBUs, using a heartbeat link to inform the opposite frames of the state information. And setting the same health degree inspection rule for the two BBUs to judge, and converting the machine frame of the main BBU into standby under the condition that the condition of switching between the main BBU and the standby BBU is met, wherein the machine frame of the standby BBU is converted into the main BBU. For example, in response to the fault message, according to the health degree inspection rule, the influence of the fault on the primary and secondary BBUs is judged, and when the condition of primary and secondary switching is satisfied, the two BBUs perform primary switching and secondary switching operations respectively.

The BBU for transferring sends a main transferring notification to the frame optical interface unit; the BBU machine frame for transferring the main machine transmits a transferred notification to the optical interface unit of the frame.

Seventh step, RRU signals link switching.

At this time, when the main and standby states of the BBU frame 1 and the BBU frame 2 are switched, the RRU receives control words of the two optical ports to change. And the RRU starts the signaling link switching under the effective state of the 'double BBU redundancy networking' identification.

And the RRU continuously completes refreshing of the RRU virtual link of the BBU and calculation and issuing of reverse delay data according to the fourth step and the fifth step.

Example 2

In embodiment 2, a typical ring network configuration networking is adopted, as shown in fig. 13, 3 RRUs are configured on a chain, and a BBU machine frame 1 (hereinafter referred to as BBU 1) is assumed to be configured as a primary frame, a BBU machine frame 2 (hereinafter referred to as BBU 2) is assumed to be configured as a standby frame, and all RRUs and BBU1 establish signaling links to operate under BBU 1.

After two BBUs are electrified, the BBU1 acquires configuration data to obtain a 'BBU redundant networking' identifier and a BBU main identifier; the BBU2 acquires configuration data to obtain a 'BBU redundant networking' identifier and a BBU standby identifier;

at this time, the BBU needs to complete the steps of issuing the primary and backup identifiers, establishing a signaling link between the RRU and the primary BBU, maintaining a virtual link between the RRU and the backup BBU, configuring reverse delay, detecting a physical link of the RRU, and the like.

When the RRU1 and the RRU2 are in optical fiber interruption, the BBU decides main and standby switching according to the effective physical links of the two parties, the RRU2 and the RRU3 recognize the change of the optical port control word, switch links and establish a signaling link with the BBU 2.

As shown in fig. 13, after the optical fibers between the RRU1 and the RRU2 are interrupted, the RRU2 and the RRU3 cannot continue to provide services for the BBU1, at this time, the BBU decides primary-standby switching according to the effective physical links of the two parties, the RRU2 and the RRU3 recognize the change of the optical port control word, switch the link, and establish a signaling link with the BBU 2. After the BBU1 and the BBU2 are switched, the BBU1 is converted into a standby BBU, the BBU2 is converted into a main BBU, and the RRU2, the RRU3 and the BBU2 establish signaling links to provide services for the BBU 2.

The specific treatment process is as follows:

The RRU link management unit 1 of the BBU1 transmits a 'BBU frame main identifier' to the optical interface unit 1, the optical interface unit stores the 'BBU frame main identifier', and the RRU identity identifiers in networking structure information are sorted by taking an optical port as a basic unit, and all RRUs are recorded as a 'main identifier' state; meanwhile, the RRU link management unit 2 issues a 'BBU machine frame standby identifier' to the optical interface unit 2, the optical processing unit stores the 'BBU machine frame standby identifier', and the RRU identity identifiers in networking structure information are sorted by taking an optical port as a basic unit, so that all RRUs are recorded as a 'standby identifier' state.

The optical interface unit 1 and the optical interface unit 2 respectively insert RRU identity marks into appointed position fields of a CPRI at the bottom layer, and when a physical link of the optical fiber at the bottom layer is smooth, the RRU can normally acquire the identity marks belonging to the RRU; when the optical fiber physical links at the two sides of the RRU are smooth, the RRU can acquire 2 identities from the two optical ports.

According to the scenario in fig. 13, RRUs numbered 1 to 3 receive the "active identification" sent from the direction of the optical interface unit 1 and the "standby identification" from the optical interface unit 2,

Each RRU sets the address of the optical interface unit 1 as a route, selects a BBU establishing signaling link with the direction of the main identifier, and initiates a signaling link establishing request with the RRU link management unit of the BBU1 to complete the establishment of the signaling link.

The main BBU1 broadcasts the IP address of the standby BBU2 to each RRU, the RRU and the standby BBU2 both set the IP address of the BBU1 as a gateway for communication between the RRU and the standby BBU, and the virtual link between the RRU and the BBU2 is established by combining the heartbeat link between the two BBUs.

Each RRU utilizes a signaling link between the RRU and the main BBU to report delay component data, the optical interface unit 1 periodically detects the optical fiber delay, and the optical fiber compensation data of the main direction is calculated by combining the component delay.

Each RRU reports delay component data by using a virtual link established with the standby BBU2, and after the BBU2 receives the delay component data, the delay component data of each RRU is sent to the optical interface unit 2 according to networking configuration information.

The optical interface unit 2 periodically calculates reverse delay data of RRU of the board in standby state; the reverse delay data refers to delay data of the physical connection direction of the standby BBU2 and the RRU, and delay compensation data of each RRU in the standby BBU2 direction is obtained by combining delay component data reported by the RRU.

And the BBU2 uses a virtual link between the BBU2 and the RRUs to send the directional delay compensation data to each RRU, and the RRUs are stored in the standby area and activated when the RRUs are to be switched.

After the NG interface of BBU1 fails, BBU1 cannot provide service, and the two BBUs negotiate switching. The BBU1 is switched to standby, and a switching judgment unit of the BBU1 sets a frame identifier as standby; the BBU2 is switched to the main, and the BBU2 switching judgment unit sets the frame identifier as the main.

The RRU link management unit 2 of the BBU2 after the transfer deletes the gateway configuration of the BBU1 IP, and sets the IP of the optical interface unit 2 of the BBU2 as the route to the RRU. The BBU1 after the conversion eliminates the configuration of the optical interface unit 1 as a route to the RRU.

The optical interface unit 2 receives the standby-to-active notification, and uses the RRUs as basic units to sort all the RRU identification marks in the networking structure information, and records all the RRUs as a 'active' state.

The optical interface unit 1 receives the main-standby notification, and uses the RRUs as basic units to sort all the RRU identification marks in the networking structure information, and records all the RRUs as a standby state.

The RRU2 and the RRU3 receive a main identifier sent by the optical interface unit 2 and a standby identifier from the optical interface unit 1, find that an optical port where the main identifier is located is switched, delete the gateway setting in the direction of the configured and original BBU, refresh the optical interface unit in the new main direction as a route, select the direction of the new main physical control word and complete the link establishment with the new main BBU; and the RRU2 and the RRU3 take effect of delay and IQ configuration of the standby area, extract baseband data from the bottom physical link, receive baseband signals of the BBU2 and provide services for the new main BBU 2.

The RRU1 receives the "standby identification" from the optical interface unit 1 and the invalid identification generated by the physical interruption.

After successful link establishment, the new main BBU2 broadcasts the IP address of the new standby BBU1 to each RRU, and the RRU records the IP address of the main BBU2 as the gateway address leading to the standby BBU 1. The standby BBU1 sets the IP address of the main BBU2 as the gateway IP for communication with the RRU, and the establishment of the virtual link between the standby BBU1 and the RRU is completed.

The RRU2 and the RRU3 report component delay by using a signaling link between the RRU2 and the main BBU2, the optical interface unit 2 periodically detects the optical fiber delay, and the optical fiber compensation data of the main direction is calculated by combining the component delay.

And the RRU2 and the RRU3 report delay component data by utilizing a virtual link established with the standby BBU1, and after the BBU1 receives the delay component data, the delay component data of the RRU2-3 are sent to the optical interface unit 1 according to networking configuration information.

The optical interface unit 1 periodically calculates reverse delay data of RRU of the board in standby state; the reverse delay data is combined with the delay component data of the RRU in the step 6 to obtain delay compensation data of the RRU2-3 in the direction of the standby BBU.

The BBU1 uses a virtual link between the BBU1 and the RRUs to send the directional delay compensation data to each RRU, the RRUs are stored in the standby area, and the RRUs are activated when a switching command is received.

In combination with embodiment 2, it can be found that the bottom physical link of the RRU is limited by the chip, and the effective link is determined by utilizing the RRU physical link detection, and then the health degree of the two BBUs is determined according to the number of the effective links on both sides, and the RRU is not limited by the chip any more, and establishes a virtual link with the spare BBU through software, so that the key data configuration of the spare BBU is received in advance, and when the switching occurs, only the data needs to be activated, thereby greatly reducing the service interruption time and simplifying the fault recovery process.

one or more processors;

In a fifth aspect, the present disclosure provides a baseband unit, including:

one or more processors;

In a sixth aspect, embodiments of the present disclosure provide an electronic device, as shown in fig. 14, including:

one or more processors 501;

A memory 502 having one or more programs stored thereon, which when executed by one or more processors causes the one or more processors to implement the method for controlling a link of a remote radio unit as described in any one of the first to third aspects above;

one or more I/O interfaces 503, coupled between the processor and the memory, are configured to enable information interaction of the processor with the memory.

Wherein the processor 501 is a device having data processing capabilities, including but not limited to a Central Processing Unit (CPU) or the like; memory 502 is a device with data storage capability including, but not limited to, random access memory (RAM, more specifically SDRAM, DDR, etc.), read-only memory (ROM), electrically charged erasable programmable read-only memory (EEPROM), FLASH memory (FLASH); an I/O interface (read/write interface) 503 is coupled between the processor 501 and the memory 502 to enable information interaction between the processor 501 and the memory 502, including but not limited to a data Bus (Bus) or the like.

In some embodiments, processor 501, memory 502, and I/O interface 503 are connected to each other and, in turn, other components of the computing device via bus 504.

In a seventh aspect, an embodiment of the present disclosure provides a computer readable medium, as shown in fig. 15, where a computer program is stored, and the computer program when executed by a processor implements the method for controlling a link of a remote radio unit according to any one of the first to third aspects.

According to the RRU link control method in the distributed base station BBU redundancy mode, the RRU can obtain key configuration data of the standby BBU in advance when the RRU provides service for the main BBU by establishing the main entity link and the standby virtual link, and when the main BBU and the standby BBU are switched, the processing time consumed by fault recovery is greatly reduced, and the effect of quickly recovering service is finally achieved.

Those of ordinary skill in the art will appreciate that all or some of the steps of the methods, systems, functional modules/units in the devices disclosed above may be implemented as software, firmware, hardware, and suitable combinations thereof.

In a hardware implementation, the division between the functional modules/units mentioned in the above description does not necessarily correspond to the division of physical components; for example, one physical component may have multiple functions, or one function or step may be performed cooperatively by several physical components. Some or all of the physical components may be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on computer readable media, which may include computer storage media (or non-transitory media) and communication media (or transitory media). The term computer storage media includes both volatile and nonvolatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data, as known to those skilled in the art. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital Versatile Disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium which can be used to store the desired information and which can be accessed by a computer. Furthermore, as is well known to those of ordinary skill in the art, communication media typically embodies computer readable instructions, data structures, program modules or other data in a modulated data signal such as a carrier wave or other transport mechanism and includes any information delivery media.

The preferred embodiments of the present disclosure have been described above with reference to the accompanying drawings, and are not thereby limiting the scope of the claims of the present disclosure. Any modifications, equivalent substitutions and improvements made by those skilled in the art without departing from the scope and spirit of the present disclosure shall fall within the scope of the claims of the present disclosure.

Claims

1. A link control method for a Remote Radio Unit (RRU) is used for remote RRU, and comprises the following steps:

2. The link control method of a remote radio unit according to claim 1, wherein the current primary BBU is a first BBU, the current standby BBU is a second BBU, and the method further comprises, in a case where the primary and standby switching occurs between the first BBU and the second BBU:

3. The link control method of a remote radio unit according to claim 1, wherein,

The first reverse control information comprises time delay component data which is detected by the RRU and used for calculating forward measurement data and reverse measurement data after the establishment of an upper communication link is confirmed;

The second reverse control information comprises reverse delay compensation data calculated according to the delay component data and reverse link measurement data, wherein the reverse link measurement data is delay data measured on a link which does not pass through the main BBU between the standby BBU and the RRU.

4. The method for controlling a link of a remote radio unit according to claim 1, wherein said sending the first reverse control information to the primary baseband unit BBU includes:

5. The link control method of remote radio units according to claim 1, wherein the destination address of the first reverse control information is a standby BBU, and the gateway address of the RRU is a primary BBU.

6. The link control method of a remote radio unit according to any one of claims 1 to 5, wherein the method further comprises:

7. A link control method of a Remote Radio Unit (RRU) is used for a baseband unit BBU, and comprises the following steps:

transmitting the first reverse control information to the standby BBU;

and sending the second reverse control information to the RRU.

8. The link control method of a remote radio unit of claim 7, wherein,

The receiving the first reverse control information includes:

9. The link control method of a remote radio unit of claim 7, wherein,

The receiving the second reverse control information includes:

the sending the second reverse control information to the RRU includes:

10. The method of link control for a remote radio unit of claim 7, wherein the method further comprises:

11. The link control method of a remote radio unit according to any of claims 7 to 10, wherein in case the current primary BBU switches to a standby state, the method further comprises:

Recording all RRUs as standby states;

and sending the standby identification to all RRUs.

12. A link control method of a Remote Radio Unit (RRU) is used for a baseband unit BBU, and comprises the following steps:

13. The method of link control for a remote radio unit of claim 12, wherein the current BBU is in a standby state, the method further comprising:

14. The link control method of a remote radio unit of claim 12, wherein,

The first reverse control information comprises time delay component data which is detected by the RRU and is used for calculating forward measurement data and reverse measurement data after the establishment of an upper communication link is confirmed;

The second reverse control information comprises reverse delay compensation data calculated according to the delay component data and reverse link measurement data, wherein the reverse link measurement data is delay data measured on a link which does not pass through the main BBU between the current BBU and the RRU.

15. The method for controlling a link of a remote radio unit according to claim 12, wherein said sending the second reverse control information to the primary BBU comprises:

16. The link control method of remote radio units according to claim 12, wherein the destination address of the second reverse control information is the RRU, and the gateway address of the current BBU is the primary BBU.

17. The link control method of a remote radio unit according to any of claims 12 to 16, wherein in case the current BBU is switched to the active state, the method further comprises:

recording all RRUs as a main state;

And sending the main identification to all RRUs.

18. A remote radio unit comprising:

one or more processors;

A memory having one or more programs stored thereon, which when executed by the one or more processors cause the one or more processors to implement the method of controlling a link of a remote radio unit according to any one of claims 1 to 6;

19. A baseband unit comprising:

one or more processors;

a memory having one or more programs stored thereon, which when executed by the one or more processors cause the one or more processors to implement the method of controlling a link of a remote radio unit according to any one of claims 7 to 17;

20. An electronic device, the electronic device comprising:

one or more processors;

A memory having one or more programs stored thereon, which when executed by the one or more processors cause the one or more processors to implement the method of controlling a link of a remote radio unit according to any one of claims 1 to 17;

21. A computer readable medium having stored thereon a computer program which when executed by a processor implements a method of controlling a link of a remote radio unit according to any of claims 1 to 17.