CN113259009B

CN113259009B - RHUB, BBU and RHUB cascading type load sharing system and method

Info

Publication number: CN113259009B
Application number: CN202010084806.9A
Authority: CN
Inventors: 杨磊
Original assignee: Datang Mobile Communications Equipment Co Ltd
Current assignee: Datang Mobile Communications Equipment Co Ltd
Priority date: 2020-02-10
Filing date: 2020-02-10
Publication date: 2022-08-05
Anticipated expiration: 2040-02-10
Also published as: CN113259009A

Abstract

The embodiment of the invention provides a RHUB, BBU and RHUB cascading type load sharing system and a method thereof, wherein an uplink module of the RHUB is provided with at least two uplink optical ports, and a downlink module is provided with at least two downlink optical ports, so that the RHUB can receive downlink data through a plurality of uplink optical ports simultaneously, and the traffic of the RHUB which can be processed simultaneously is increased. The connection module connected with the RHUB on the BBU is provided with at least two transmission optical ports, so that the BBU can transmit downlink data to the RHUB through the plurality of transmission optical ports simultaneously, and the traffic which can be processed by the BBU simultaneously is increased. Based on the BBU with a plurality of transmission optical ports and the RHUB distribution structure with a plurality of upper optical ports and lower optical ports, the requirement on service bearing capacity under the conditions of flexible networking and large-capacity coverage can be met, meanwhile, data congestion is avoided by shunting of downlink data through the plurality of optical ports, and the quality of service processing can be improved.

Description

RHUB, BBU and RHUB cascading type load sharing system and method

Technical Field

The invention relates to the technical field of communication, in particular to a RHUB, BBU and RHUB cascading type load sharing system and method.

Background

In the field of wireless access networks, with the development of multi-standard access devices and the increase of the number of users, more services need to be processed at the same time. However, due to the limitation of the hardware structure, the data traffic that can be transmitted by the base station at the same time is fixed, and therefore, the access of the multi-mode access device and the situation of excessive number of users cannot be satisfied.

For example, a device manufacturer usually develops Multiple Access devices on a hardware platform, such as W-CDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), CDMA (Code Division Multiple Access), LTE-TDD (long Term Evolution-Time Division Duplex mode), LTE-FDD (long Term Evolution-Frequency Division Duplex mode), and other base stations. With the increasing appearance of multi-system fusion scenes, for example, the evolution type fusion of TD-SCDMA and LTE-TDD, and the system type fusion of LTE-TDD and LTE-FDD all bring the fusion of hardware platform maintenance and service isolation conditions, which results in the need to process two or more services of the wireless operation and maintenance network at the same time.

It can be seen that the service carrying capacity of the existing wireless access network is limited, and the requirements on the service carrying capacity under the conditions of flexible networking and large-capacity coverage cannot be met.

Disclosure of Invention

The embodiment of the invention provides an RHUB, BBU and RHUB cascading type load sharing system and method, which are used for solving the problems that the service bearing capacity of the existing wireless access network in the prior art is limited, and the requirements on the service bearing capacity under the conditions of flexible networking and large-capacity coverage cannot be met.

In view of the above technical problems, in a first aspect, an embodiment of the present invention provides a radio remote hub RHUB, including an uplink module, a downlink module, an output module, and a first processing module;

the upper connection module comprises at least two upper light connection ports, and the lower connection module comprises at least two lower light connection ports;

the output module is used for connecting at least one radio remote unit RRU;

the first processing module is used for receiving downlink data transmitted by the BBU through at least two uplink optical ports after an OM channel is established between the first processing module and the BBU, and sending the downlink data through the downlink module and/or the output module.

In a second aspect, an embodiment of the present invention provides a BBU, including a connection module and a second processing module;

the connection module comprises at least two transmission optical ports and is used for being connected with an upper connection module of a first RHUB in a cascade structure, wherein the cascade structure is formed by connecting a plurality of RHUBs in series;

the second processing module is configured to transmit downlink data to the RHUB, which establishes an OM channel with the BBU in the cascade structure, through at least two transmission optical ports in the connection module.

In a third aspect, an embodiment of the present invention provides an RHUB cascaded load sharing system, including a cascaded structure formed by connecting a plurality of RHUBs in series, a BBU as described in any of the above, and at least one RRU connected to each RHUB;

each transmission optical port in the connection module of the BBU is correspondingly connected with each upper optical port in the upper connection module of the first RHUB of the cascade structure;

and the RHUB in the cascade structure is connected with each upper light coupling port in the upper connection module of another RHUB through each lower light coupling port in the lower connection module.

In a fourth aspect, an embodiment of the present invention provides a method for sharing a RHUB cascaded load, including:

after any RHUB detects that an OM channel is established between the RHUB and a baseband processing unit (BBU), downlink data transmitted by the BBU through at least two upper optical ports of the RHUB are received, and the downlink data are transmitted through at least two lower optical ports of the RHUB and/or an output module connected with an RRU in the RHUB.

In a fifth aspect, an embodiment of the present invention provides a method for sharing a RHUB cascaded load, where the method includes:

after a BBU connected with a cascade structure detects that an OM channel is established with any RHUB in the cascade structure, downlink data are transmitted to the RHUB through at least two transmission optical ports of the BBU;

wherein the cascade structure is composed of a plurality of RHUBs connected in series.

In the system and method for load sharing in a cascaded manner of the RHUB, the BBU and the RHUB, provided by the embodiment of the invention, the uplink module of the RHUB is provided with at least two uplink optical ports, and the downlink module is provided with at least two downlink optical ports, so that the RHUB can receive downlink data through a plurality of uplink optical ports at the same time, and the traffic volume which can be simultaneously processed by the RHUB is increased. The connection module connected with the RHUB on the BBU is provided with at least two transmission optical ports, so that the BBU can transmit downlink data to the RHUB through the plurality of transmission optical ports simultaneously, and the traffic which can be processed by the BBU simultaneously is increased. Based on the BBU with a plurality of transmission optical ports and the RHUB distribution structure with a plurality of upper optical ports and lower optical ports, the requirement on service bearing capacity under the conditions of flexible networking and large-capacity coverage can be met, meanwhile, data congestion is avoided by shunting of downlink data through the plurality of optical ports, and the quality of service processing can be improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a comparative BBU and RHUB cloth formula provided by an embodiment of the present invention;

FIG. 2 is a schematic diagram of the cloth formula of the RHUB and BBU of the dual optical fiber provided by another embodiment of the present invention;

fig. 3 is a schematic diagram of a hierarchical message sending relationship of an RHUB according to another embodiment of the present invention;

FIG. 4 is a schematic diagram of the cloth formula of BBU and RHUB of the dual optical fiber provided by another embodiment of the present invention;

FIG. 5 is a schematic diagram of a processing procedure of a BBU provided by another embodiment of the present invention after the optical port status changes.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

To better illustrate that the present application can improve service carrying capacity and meet requirements for service carrying capacity under flexible networking and high-capacity coverage, fig. 1 provides a schematic diagram of a formula of BBU (Base band Unit) and RHUB (Remote Radio Unit-Hub) for comparison, referring to fig. 1, BBU is connected with a cascade structure cascaded by RHUBs through an optical fiber, RHUBs are cascaded through a single optical fiber in the cascade structure, each RHUB is connected with at least one PicoRRU (Pico-Remote Radio Unit) through a network cable, only one PicoRRU is shown in fig. 1, and each RHUB can be connected with 8 picorrus. It is understood that since the distribution formula shown in fig. 1 is generally applied indoors, each RHUB is connected to PicoRRU, and the RHUB can also be connected to at least one RRU (Remote Radio Unit) based on the requirements of other scenarios, for example, outdoor scenarios.

Under the distribution formula shown in fig. 1, the RHub limited to single-optical-port distribution can only be connected to one optical fiber, so that the PicoRRU connected to the RHub can only establish one cell, and the bearing capacity of one cell is limited, so that the resources capable of being transmitted at the same time are limited. In an environment with huge people flow, such as a large venue, the huge number of terminal accesses will cause the degradation of terminal user experience due to the limited carrying capacity of one cell.

In order to solve the technical problem, the application provides an RHUB, which comprises an upper connection module, a lower connection module, an output module and a first processing module;

the output module is used for connecting at least one radio remote unit RRU;

The first processing module is an FPGA (Field Programmable Gate Array).

Wherein, the number of the lower light coupling ports is equal to the number of the upper light coupling ports.

Taking an example that the RHUB has 2 upper optical ports and 2 lower optical ports, fig. 2 is a schematic diagram of a formula of the RHUB and BBU of the dual optical fiber provided in this embodiment, referring to the RHUB in fig. 2, the upper module includes an upper optical port 201 and an upper optical port 202, and the lower module includes a lower optical port 203 and a lower optical port 204. The output module in RHUB is connected to PicoRRU via port 207.

When the RHUB and the BBU are connected in the connection manner shown in fig. 2 and an OM channel is established, the first processing module in the RHUB may receive downlink data sent by the BBU through the two upper optical ports, and transmit the downlink data to the PicoRRU through the network port of the output module and/or transmit the downlink data to other RHUBs through the two lower optical ports, so as to transmit the downlink data to the PicoRRU connected to other RHUBs.

Therefore, the design of multiple upper optical coupling ports and multiple lower optical coupling ports in the RHUB increases the data volume of downlink data which can be simultaneously transmitted by the RHUB. For picoRRU, BBU and RHUB transmit data through multiple optical fibers, and each optical fiber can support the establishment of a cell, so that picoRRU can establish multiple cells, and the service is shared by the multiple cells, thereby improving the service carrying capacity.

This embodiment provides a RHUB, and the module of alliing oneself with on RHUB sets up two at least and allies oneself with the optical port, and allies oneself with the module down and set up two at least and allies oneself with the optical port down for RHUB can receive down data through a plurality of on alliing oneself with the optical port simultaneously, has increased the traffic that RHUB can handle simultaneously.

It should be noted that the RHUB may be connected to the BBU alone, or may be connected to the BBU in a cascade structure composed of RHUBs. Wherein, the cascade structure is formed by connecting a plurality of RHUBs in series. Specifically, except for the first RHUB in the cascade structure, each upper light coupling port of each RHUB is respectively connected with one lower light coupling port of another RHUB, and except for the last RHUB in the cascade structure, each lower light coupling port of each RHUB is connected with one upper light coupling port of another RHUB.

In order to show the change of the processing logic of the first processing module after the RHUB is changed from the single upper optical coupling port to the plurality of upper optical coupling ports and from the single lower optical coupling port to the plurality of lower optical coupling ports, the following (1) and (2) are used for illustration:

(1) and the first processing module in the RHUB detects the processing process after the OM channel between the first processing module and the BBU is disconnected. The method and the device do not need to describe the establishment process of the OM channel any more, and only introduce how the RHUB determines the connection relationship between each upper optical connection port and each lower optical connection port before the OM channel is established, and how to determine the process of the main optical connection port from each upper optical connection port.

Further, on the basis of the foregoing embodiment, the first processing module is further configured to:

if the OM channel between the optical interface and the BBU is detected to be disconnected, controlling each upper optical connection port to send optical interface information to the BBU, wherein the optical interface information comprises an optical interface identifier of the upper optical connection port and the stage number of the RHUB where the upper optical connection port is located in the cascade structure;

receiving main optical port information determined by the BBU according to the optical port information, and determining a main optical port from an upper optical port of the upper connection module according to the main optical port information, wherein the main optical port information comprises optical port information corresponding to the upper optical port serving as the main optical port;

determining a main optical port cascade relation corresponding to a main optical port in the uplink module and an auxiliary optical port cascade relation corresponding to each auxiliary optical port in the uplink module, and sending the main optical port cascade relation and the auxiliary optical port cascade relation to the BBU, wherein the auxiliary optical ports are uplink optical ports in the uplink module except the main optical port;

the cascade relation of the main optical ports comprises a first connection relation between a main optical port in the upper connection module and a first lower connection optical port in the lower connection module, and a second connection relation between the first lower connection optical port and a main optical port of a next stage RHUB; the auxiliary optical port cascade relation comprises a third connection relation between any first auxiliary optical port in the upper connection module and a second lower connection optical port in the lower connection module, and a fourth connection relation between the second lower connection optical port and a second auxiliary optical port in a next stage RHUB; the cascade structure is composed of a plurality of RHUBs connected in series.

Further, on the basis of the foregoing embodiments, the determining a cascade relationship of a main optical port corresponding to a main optical port in the upper connection module and a cascade relationship of an auxiliary optical port corresponding to each auxiliary optical port in the upper connection module includes:

if the RHUB is judged not to be the first RHUB of the cascade structure, controlling each upper optical connection port in the upper connection module to send optical connection information to an upper-stage RHUB, and if the RHUB is judged not to be the last RHUB of the cascade structure, receiving the optical connection information sent by each upper optical connection port of a lower-stage RHUB;

determining a lower optical coupling port corresponding to a main optical port of a next-stage RHUB according to optical port information sent by each upper optical coupling port of the next-stage RHUB, taking the lower optical coupling port as a first lower optical coupling port, determining a first connection relation between a main optical port in the upper coupling module and the first lower optical coupling port, and a second connection relation between the first lower optical coupling port and the main optical port of the next-stage RHUB as a main optical port cascade relation;

the method comprises the steps of obtaining any one of a first auxiliary optical port in the upper connection module, which is not in the auxiliary optical port cascade relationship, and any one of a second lower connection optical port in the lower connection module, which is not in the auxiliary optical port cascade relationship and is not in the main optical port cascade relationship, determining a third connection relationship between the first auxiliary optical port and the second lower connection optical port, obtaining a second auxiliary optical port corresponding to the second lower connection optical port in the next-stage RHUB according to optical port information received by the second lower connection optical port and sent by the next-stage RHUB, determining a fourth connection relationship between the second lower connection optical port and the second auxiliary optical port, and determining the auxiliary optical port cascade relationship according to the determined third connection relationship and the determined fourth connection relationship.

Wherein, still include: and after the BBU receives the cascade relation of the main optical ports sent by the RHUBs and the cascade relation of the auxiliary optical ports corresponding to the auxiliary optical ports sent by the RHUBs, an OM channel is established with each RHUB.

Wherein, still include: the first processing unit stores the cascade relation of the main optical port and the cascade relation of the auxiliary optical ports determined in the RHUB of the current stage.

Wherein, still include: and/or, the downlink data received by any first auxiliary optical port of the RHUB of the current stage is transmitted to a second auxiliary optical port of the next stage of RHUB through a second lower coupling optical port corresponding to the first auxiliary optical port.

For example, assuming that each upper optical coupling port of the first RHUB in fig. 2 transmits optical port information to the BBU, and the BBU receives the optical port information transmitted by the upper optical coupling port 201 first, the upper optical coupling port 201 is stored as the main optical port of the RHUB on the BBU side, and the main optical port information is transmitted to the first RHUB. In addition, through the same process, the upstream optical port 202 in the second RHUB is determined to be the main optical port. Then, the first RHUB receives information of optical ports transmitted by each upper optical port of the second RHUB, and obtains a lower optical port (assumed to be a lower optical port 203) that receives optical port information of a main optical port of the next-stage RHUB, where the lower optical port is the first lower optical port. The main port cascade relationship of the first RHUB includes: the upper light coupling port 201 (i.e., the main light port of the first RHUB) is connected to the lower light coupling port 203, and the lower light coupling port 203 is connected to the upper light coupling port 202 of the second RHUB (i.e., the main light port of the second RHUB).

For a plurality of auxiliary optical ports other than the main optical port at the middle of the RHUB, for example, in fig. 2, the auxiliary optical port 202 of the first RHUB has not appeared in the auxiliary optical port cascade relationship, and the lower optical port 204 has not appeared in the auxiliary optical port cascade relationship and has not appeared in the main optical port cascade relationship, the first processing module determines a third connection relationship that the auxiliary optical port 202 (i.e., the first auxiliary optical port) of the first RHUB is connected to the lower optical port 204 (i.e., the second lower optical port). Assuming that the optical port information received by the downstream optical port 204 comes from the auxiliary optical port 201 of the next RHUB (i.e., the second auxiliary optical port in the second RHUB), a fourth connection relationship is determined in which the downstream optical port 204 (i.e., the second downstream optical port) is connected to the auxiliary optical port 201 of the next RHUB. And the third connection relation and the fourth connection relation form an auxiliary optical port cascade relation of the RHUB.

In this embodiment, the RHUB determines a main optical port in the RHUB by sending optical port information to the BBU, and determines a connection relationship between each upper optical port and each lower optical port by sending the optical port information between the upper and lower RHUB of the cascade structure, thereby ensuring that the RHUB correctly sends downlink data according to the determined connection relationship and avoiding data transmission errors.

The main optical port in the upper optical ports in the RHub is determined by the BBU, and the RRU ID (i.e., optical port information including optical port identification and number of stages where the optical port is located) sent by which upper optical port is received first, and the OM channel is successfully established, which is the main optical port. The main optical port of the internal and lower connection of the Rsub is determined by the lower Rsub. Fig. 3 is a schematic diagram of a relationship of sending messages at different levels of the RHUB according to this embodiment, which is a process shown in fig. 3. After the BBU sends the main optical port information to the FPGA (namely, the first processing module) of each RHUB, the RHUB of the next stage sends the RRU ID (namely, the optical port information) to the RHUB of the current stage in the cascade structure, the OM controls the switching optical port to obtain the RRUID, the RHUB of the current stage determines the lower optical port connected with the main optical port of the next stage, and the FPGA is configured in a driving mode. On the other hand, the RHUB of the current stage determines the lower optical ports connected to the auxiliary optical ports, and the lower auxiliary optical ports connected to the lower optical ports. And finally, each RHUB sends a transparent transmission message (the transparent transmission message comprises a superior Rhub stage, a superior Rhub lower-link main optical port number and the like) to the BBU through an OM channel between the RHUB and the BBU so as to mark a concatenated main optical fiber on the side of the BBU. As can be seen from fig. 3, when determining the connection relationship between the optical ports, the information provided by the FPGA requiring the RHUB includes: the optical port number of the lower link obtained by the optical port 1 (i.e. the main optical port of the RHUB of the current stage), the optical port number of the lower link obtained by the optical port 2 (i.e. each auxiliary optical port of the RHUB of the current stage), and the main optical port number of the upper link.

(2) After detecting that an OM channel between the first processing module in the RHUB and the BBU is established, if detecting that a communication abnormality exists in the main optical port and/or the auxiliary optical port, the first processing module in the RHUB performs processing.

Further, on the basis of the foregoing embodiments, the first processing module is further configured to:

after an OM channel is established between the upper connection module and the BBU, if the communication abnormality of a main optical port in the upper connection module is monitored, the OM channel between the upper connection module and the BBU is disconnected;

the abnormal communication of the main optical port in the uplink module comprises a failure of data transmission between the main optical port and the BBU caused by a failure of the main optical port in the uplink module or a failure of the main optical port in the RHUB cascaded before the RHUB of the current stage in the cascade structure; the RHUB of the current stage is the RHUB where the upper connection module in the cascade structure is located.

After an OM channel is established between the BBU and the BBU, if the third auxiliary optical port in the uplink module is monitored to be abnormal in communication, the third auxiliary optical port is not processed, and after the communication is recovered to be normal, information that the third auxiliary optical port is recovered to be normal is sent to the BBU, so that the state of the third auxiliary optical port is marked to be normal by the BBU.

Fig. 4 is a schematic diagram of the arrangement formula of BBUs and RHUBs of dual optical fibers provided in this embodiment, referring to fig. 4, in a cascade structure formed by RHUBs connected in series, when a RHUB detects a communication abnormality of a main optical port, the communication abnormality may be caused by a failure of the main optical port of the RHUB itself, or the communication abnormality of the main optical port of the RHUB may be caused by a failure of the main optical port of the RHUB in front of the RHUB itself, and for any reason, the RHUB determines that the current communication is disconnected from an OM channel of the BBU, and needs to reestablish the OM channel.

In this embodiment, after detecting the failure of the main optical port, the RHUB disconnects the OM channel between the optical port and the BBU, so as to re-determine the cascade relationship of each optical port, and ensure that subsequent communication is normal.

after an OM channel is established between the upstream optical interface and the BBU, if any third auxiliary optical interface in the RHUB is monitored to be abnormal in communication, judging whether the bandwidth allowance of a main optical interface in the uplink module is larger than or equal to the occupied bandwidth of downlink data transmitted through the third auxiliary optical interface, if so, using the downlink data transmitted by the third auxiliary optical interface as aggregated data, and transmitting the aggregated data by the main optical interface in the uplink module;

if the bandwidth allowance is smaller than the occupied bandwidth, judging whether a fourth auxiliary optical port with the bandwidth allowance larger than or equal to the occupied bandwidth exists in auxiliary optical ports except the third auxiliary optical port in the uplink module, if so, transmitting the converged data by the fourth auxiliary optical port, otherwise, discarding the converged data;

the bandwidth margin is a bandwidth which is not occupied by transmitted downlink data in a bandwidth carried by the uplink optical interface.

For the condition that the auxiliary optical port in the RHUB has communication abnormality, the downlink data transmitted on the auxiliary optical port with communication abnormality can be transferred and transmitted through the main optical port or other auxiliary optical ports. The portion of data is discarded when the main or other secondary optical port is unable to transmit the portion of data.

In this embodiment, when the auxiliary optical port is abnormal, the service of the auxiliary optical port is transferred, so that the service originally carried at the auxiliary optical port can also be normally carried out when the auxiliary optical port is abnormal.

and after an OM channel is established between the uplink data and the BBU, receiving the uplink data transmitted by the downlink module, and transmitting the uplink data through a main optical port of the uplink module.

Compared with the downlink data, the data volume of the uplink data is smaller, so in order to ensure the transmission quality of the uplink data, each RHUB transmits the uplink data to the BBU through the main optical port.

The improvement of the RHUB in the hardware equipment comprises the following steps:

1) the RHUB device is changed from two 10G optical ports to 4 10G optical ports, two of which are used for add-on coupling to the BBU board. Each optical port supports a single fiber 10G transmission rate. The dual optical ports can be configured into a single-fiber 10G or dual-fiber load sharing (total 20G) scene according to the actual cell requirements. Can simultaneously support concatenation and sharing conformity.

2) PicoRRU supports GSM, GSM signals are fed in by a first-stage RHUB, and downlink broadcast uplink signals are superposed. The downlink PicoRRU can independently control whether GSM is started or not, and the central frequency points of all the PicoRRUs connected with the RHUB in series and hung downwards are the same.

3) If the TDL + FDD dual mode, the FDD baseband board is located at the slot positions 6 and 7, the TDL baseband board is located at the slot positions 4 and 5, and the FDD carrier wave is dispatched to the TDL baseband board through the cross board.

4) The PicoRRU has the capability of 2 TDL +1FDD/GSM and supports four working modes, namely a TDL single mode, a TDL + GSM dual mode, a TDL + FDD LTE dual mode and an FDD LTE single mode.

5) Two 1G Ethernet interfaces connected with the RHUB by the PicoRRU are changed into one 5G Ethernet interface.

The dual optical ports connected with the base band board on the RHUB support a single-fiber or dual-fiber load sharing scene, and the dual optical fiber connected with the lower part only supports two Ethernet ports connected with the same RHUB. The dual fibers are divided into a main fiber and an auxiliary fiber when used simultaneously. When the main optical fiber fails, the service on the main optical fiber is automatically migrated to the auxiliary optical fiber. If the bandwidth of the main optical fiber is not enough, only the service originally established on the main optical fiber is guaranteed. Therefore, RHUB requires the following improvements in software:

1) and the auxiliary optical port information reported by the HUB is arranged in the topology table in the channel establishment response message.

2) And canceling the self-adaptive processing of the HUB auxiliary optical port in the load sharing mode.

3) Newly-increased and HUB side passthrough message, HUB reports the main optical port number of upper reaches HUB, puts into the topological table after receiving.

4) And modifying the HUB auxiliary optical port in the time delay measurement process.

5) Modifying the MIB: the main optical port number of the HUB which is newly added in the Toporub table and is connected with the upper-level HUB (the auxiliary optical port number is actually filled due to the design of the MIB); all port numbers and access orders of HUBs were newly added to the Toporhub table.

In addition, the present embodiment provides a BBU, which includes a connection module and a second processing module;

As shown in fig. 4, the connection module of the BBU provides two transmission optical ports, which are respectively connected to the two upper optical ports of the first RHUB of the cascade structure. When transmitting downlink data, the BBU can share the downlink data through the two transmission optical ports, increasing the amount of data that can be transmitted at the same time and improving the service carrying capacity.

The embodiment provides a BBU, where a connection module connected to an RHUB on the BBU is provided with at least two transmission optical ports, so that the BBU can transmit downlink data to the RHUB through multiple transmission optical ports at the same time, and the traffic that the BBU can process at the same time is increased.

In order to show the change of the processing logic of the second processing module after the BBU is changed from the single transmission optical port to the multiple transmission optical ports, the following (3) to (5) are described:

(3) before building OM channel between BBU and RHUB, determining main optical port of RHUB and generating topological relation

Further, on the basis of the foregoing embodiments, the second processing module is further configured to:

receiving optical port information sent by each uplink optical port in any first RHUB in the cascade structure, and taking the uplink optical port corresponding to the first received optical port information as a main optical port in an uplink module of the first RHUB to generate main optical port information, wherein the optical port information comprises an optical port identifier of the uplink optical port and the number of stages of the first RHUB in the cascade structure; the main optical port information comprises optical port information corresponding to an upper coupling optical port serving as a main optical port;

sending the information of the main optical port to the first RHUB, receiving a main optical port cascade relation and an auxiliary optical port cascade relation determined by the first RHUB according to the information of the main optical port, and establishing a topological relation according to the main optical port cascade relation and the auxiliary optical port cascade relation determined by each RHUB in the cascade structure, wherein the topological relation comprises a connection relation of the main optical port in each RHUB in the cascade structure, a connection relation of the auxiliary optical port in each RHUB, a state of whether communication abnormality exists in each main optical port, and a state of whether communication abnormality exists in each auxiliary optical port, wherein the auxiliary optical port is an upper optical port except the main optical port in an upper connection module of the RHUB;

the main optical port cascade relation determined by the first RHUB comprises a first connection relation between a main optical port in the first RHUB and a first lower optical port in the first RHUB and a second connection relation between the first lower optical port and a main optical port of a next-stage RHUB; the cascade relation of the auxiliary optical ports determined by the first RHUB includes a third connection relation between any first auxiliary optical port in the first RHUB and a second lower optical port in the first RHUB, and a fourth connection relation between the second lower optical port and a second auxiliary optical port in a next-stage RHUB.

Corresponding to the processing procedure after the first processing module in the RHUB detects that the OM channel between the first processing module and the BBU is disconnected, "the BBU determines the main optical port in the RHUB according to the received optical port information of each RHUB, and receives the cascade relationship of the main optical port and the cascade relationship of the auxiliary optical ports sent by each RHUB. And generating a topological relation according to the cascade relation of each optical port and the state of whether the communication of each optical port is abnormal.

Further, the BBU distributes downlink data to be sent according to the topological relation. For example, the uplink optical port in the state of no communication abnormality allocates downlink data to be transmitted.

In this embodiment, the BBU implements reasonable allocation of the downlink data through the established topological relationship, and ensures normal transmission of the downlink data.

Specifically, since the OM channel protocol is an IR message, the OM channel is unique, so data is only transceived in the main channel. In the downlink direction, both the BBU and the RHUB broadcast the OM data at a plurality of optical ports, and the receiver only forwards the OM data received at the main optical port to the processor and simultaneously to the two downlink ports. In the uplink direction, RHUB only sends OM data at the main optical port, and meanwhile, the OM data from the lower connection port is converged to the main optical port to be sent.

Regarding data channel load sharing: since the CA distribution on the optical fiber is performed on the BBU, the load sharing of the data channel is not redistributed in the intermediate link, and thus when the RHUB is required to be concatenated, the main optical fiber of the upper stage corresponds to the main optical fiber of the lower stage, and the auxiliary optical fiber of the upper stage corresponds to the auxiliary optical fiber of the lower stage. Because the main and auxiliary optical fibers are dynamically determined when the RHUB is accessed, and the physical connection relationship is fixed, the FPGA needs to communicate the data channels of the upper main optical port and the lower main optical port, and communicate the data channels of the upper auxiliary optical port and the lower auxiliary optical port to forward data inside the RHUB.

Regarding the determination of the connection relationship between the optical ports: the RHUB internal upper connection main optical port is determined in the same way as the existing product, which optical port receives the RRU ID first and the OM channel is established successfully is the upper connection main optical port. The internal and lower connection main optical ports of the RHUB are determined by the lower RHUB. After the lower RHUB determines the upper main optical port of the lower RHUB, the FPGA sends the main optical fiber identification and the upper main optical port number to the upper RHUB through the physical layer control word on the optical port. And the upper level RHUB informs a driver/OM through interruption when the identification changes, the OM reports the number of stages/the number of the lower level main optical port/the number of the lower level upper level main optical port to the BBU, the BBU identifies the main and auxiliary optical fibers in the topology and checks the optical fibers with a network rule, and an alarm prompt is given if the optical fibers do not conform to the network rule. And the FPGA forwards data according to the interconnection relation of the main optical interface and the auxiliary optical interface.

(4) After building an OM channel between the BBU and the RHUB, detecting the condition that the communication abnormality exists in the main optical port and/or the auxiliary optical port of any RHUB

if the communication abnormality of the main optical port of the first RHUB is detected, setting the main optical port of the first RHUB and the main optical ports of all levels of RHUBs after the first RHUB in the cascade structure to be in an invalid state in the topological relation, and setting all auxiliary optical ports of the target RHUB and the auxiliary optical ports of all levels of RHUBs after the first RHUB in the cascade structure to be in an invalid state;

and if the communication abnormality of any third auxiliary optical port in the first RHUB is detected, setting the third auxiliary optical port and each auxiliary optical port connected with the third auxiliary optical port in each stage of RHUB behind the first RHUB in the cascade structure to be in an invalid state.

And further, judging whether recovery information of the recovery communication of the auxiliary optical port in the invalid state is received, and if so, setting the state of the auxiliary optical port corresponding to the recovery information as the valid state.

After the "2) processing module in the RHUB detects that the OM channel between the first processing module and the BBU is established, if it detects that the main optical port and/or the auxiliary optical port has communication abnormality," corresponding to the processing procedure that the BBU detects that any main optical port has communication abnormality, it needs to set the state of the optical port and each main optical port located behind the main optical port in the cascade structure as invalid, and simultaneously set each auxiliary optical port in the RHUB whose main optical port is in an invalid state as an invalid state, so as to update the topological relation after the connection relation of each optical port is re-determined through the above procedures (1) and (3).

In this embodiment, the BBU synchronizes the states of the main optical ports and the auxiliary optical ports, so that the states of the optical ports in the topological relationship are consistent with the actual states, which is beneficial to effectively distributing downlink data according to the topological relationship.

(5) After detecting the main optical port and/or the auxiliary optical port with communication abnormality, the BBU processes the downlink resources allocated on each optical port

judging whether a main optical port in an invalid state exists in the topological relation, if so, taking the RHUB where the main optical port in the invalid state is located as a second RHUB, deleting downlink data to be transmitted distributed on the main optical port and an auxiliary optical port of the second RHUB, and deleting the downlink data to be transmitted distributed on the main optical port and the auxiliary optical port of each level of RHUB behind the second RHUB in the cascade structure;

and if a third auxiliary optical port in an invalid state exists in the topological relation, deleting the third auxiliary optical port and downlink data to be transmitted, which are distributed on each auxiliary optical port connected with the third auxiliary optical port in each stage of RHUBs after the third RHUB in the cascade structure.

if the topological relation does not have a main optical port in an invalid state and an auxiliary optical port in the invalid state exists, acquiring a detected third auxiliary optical port in the invalid state, and taking an RHUB where the third auxiliary optical port is located as a third RHUB;

judging whether the bandwidth margin of the main optical port in the third RHUB is larger than or equal to the occupied bandwidth of the downlink data transmitted through the third auxiliary optical port, if so, taking the downlink data transmitted by the third auxiliary optical port as aggregated data, and distributing the aggregated data to the main optical port in the third RHUB for transmission;

if the bandwidth allowance is smaller than the occupied bandwidth, judging whether a fourth auxiliary optical port with the bandwidth allowance larger than or equal to the occupied bandwidth exists in auxiliary optical ports except the third auxiliary optical port in the third RHUB, if so, distributing the converged data to the fourth auxiliary optical port for transmission, otherwise, discarding the converged data;

According to the embodiment, the downlink data distributed on the optical port are deleted according to the topological relation, and the distributed downlink data are transferred, so that the data distribution is rationalized, and meanwhile, the successful transmission of all the downlink data is ensured as far as possible.

In addition, this embodiment provides a RHUB cascaded load sharing system, as shown in fig. 4, including a cascaded structure formed by a plurality of RHUBs described in any embodiment above connected in series, a BBU described in any embodiment above, and at least one RRU connected to each RHUB;

The BBU and each RHUB are connected according to the distribution formula shown in fig. 4, and the second processing module in the BBU and the first processing module in each RHUB operate according to the manner described in the above embodiments, so that the data volume of the downlink data transmitted at the same time can be increased, and meanwhile, under the condition that the optical port has a fault, the downlink data can be re-established or re-distributed through the above process, thereby ensuring normal transmission of the downlink data.

The embodiment provides a RHUB tandem type load sharing system, based on BBUs with multiple transmission optical ports and a RHUB distribution structure with multiple upper optical ports and multiple lower optical ports, which can meet the requirements on service bearing capacity under flexible networking and high capacity coverage conditions, and meanwhile, data congestion is avoided by shunting downlink data by multiple optical ports, and the quality of service processing can be improved.

The cloth formula provided in fig. 4 has been experimentally verified and the test results meet expectations. In summary, the PicoRRU + RHub deployment and configuration mode provides a flexible deployment and configuration scheme according to the surrounding environment, and the application range of PicoRRU + RHub is expanded. Meanwhile, the cell bearing capacity of each PicoRRU can be greatly expanded, so that high-quality signal coverage and excellent terminal experience are provided for large places or activities with dense flows.

For the above RHUB cascaded load sharing system, in order to more clearly illustrate a specific processing procedure of BBU on data in the system, fig. 5 shows a schematic processing procedure of BBU after a state of an optical port changes, and referring to fig. 5, the process specifically includes:

if the main optical port fails in the operation process, the rHUB and the rHUB/pRRU connected below the rHUB quit the service and try to access again.

And in the operation process, the BBU/RHUB detects the state of the lower light coupling port, reports an alarm when the auxiliary light coupling port fails, carries the rHUB stage number of the stage, and uniformly carries out fault post-processing by the BBU. And the BBU side maintains the state of each lower-link auxiliary optical port, and updates the state when the auxiliary optical port is in fault warning/clearing. In case of failure, the CA divided by the pRRU on the secondary optical fiber and the corresponding cells (including GSM) are deleted, and when the failure is cleared, the cells (including GSM) for the pRRU are attempted to be established. The selection of pRRU comprehensively considers the 'lower-link auxiliary optical port state table'. When a fault occurs, if no fault exists on the previous stage number, deleting the cell and the CA between the fault point and the next fault point; when the failure is recovered, if there is no failure in the previous stages, the cell and the CA between the current failure point and the next failure point are recovered.

1) After the RHUB reports the transparent transmission message of the RHUB abnormal state, the RRU management can firstly judge the state of the auxiliary optical port.

2) If the auxiliary optical fiber is abnormal, all the RHUB numbers downwards from the stage are searched, the state is set to be invalid, the RHUB numbers and the auxiliary optical port numbers of the invalid RHUB are filled, then the RHUB numbers and the auxiliary optical port numbers are sent to the cell module, and if the upper stage of the current RHUB is in the invalid state, the RHUB numbers are not sent to the cell and are directly returned.

3) If the auxiliary optical fiber is normal, all the superior RHUBs of the level of RHUB are searched, and if any level of RHUBs in the superior levels of the current RHUB are bad, the processing is not carried out. And if all the upper RHUBs of the current HUB are in the normal state, setting the current RHUB and all the upper RHUBs in the normal state. And sending the filling message structural body to the cell module. And searching all RHUBs of the current RHUB downwards, checking whether the uplink state of the lower-level RHUB of the traversed RHUB is normal or not, and if the uplink state is abnormal, not processing. The cell module is informed once every time the state is turned over. If the state is normal, the mark position is set to be normal state, and the message is sent to the cell module.

The embodiment provides a method for sharing RHUB cascade type load, which includes:

The method provided by this embodiment is applicable to the RHUB in the above embodiments, and is not described herein again.

In addition, the embodiment provides a RHUB cascade type load sharing apparatus, which includes a first processing module, wherein,

after detecting that an OM channel is established between the first processing module and a baseband processing unit BBU, the first processing module receives downlink data transmitted by the BBU through at least two upper optical ports of the RHUB, and transmits the downlink data through at least two lower optical ports of the RHUB and/or an output module connected with an RRU in the RHUB.

The present embodiment provides an electronic device, which includes a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement the steps of the above-mentioned method for performing a cascaded load sharing by a RHUB.

The present embodiment provides a non-transitory readable storage medium having stored thereon a computer program which, when executed by a processor, performs the steps of the above-described RHUB cascaded load sharing method performed by an RHUB.

In the RHUB cascade type load sharing method executed by the RHUB according to this embodiment, the uplink module of the RHUB is provided with at least two uplink optical ports, and the downlink module is provided with at least two downlink optical ports, so that the RHUB can receive downlink data through a plurality of uplink optical ports at the same time, and the traffic volume that the RHUB can process at the same time is increased. The connection module connected with the RHUB on the BBU is provided with at least two transmission optical ports, so that the BBU can transmit downlink data to the RHUB through the plurality of transmission optical ports simultaneously, and the traffic which can be processed by the BBU simultaneously is increased. Based on the BBU with a plurality of transmission optical ports and the RHUB distribution structure with a plurality of upper optical ports and lower optical ports, the requirement on service bearing capacity under the conditions of flexible networking and large-capacity coverage can be met, meanwhile, data congestion is avoided by shunting of downlink data through the plurality of optical ports, and the quality of service processing can be improved.

The embodiment also provides a RHUB cascading type load sharing method, which includes:

The method provided by this embodiment is applicable to BBUs in the above embodiments, and is not described herein again.

In addition, the embodiment provides a RHUB cascade type load sharing apparatus, which includes a second processing module, wherein,

after detecting that an OM channel is established with any RHUB in the cascade structure, the second processing module transmits downlink data to the RHUB through at least two transmission optical ports of the BBU;

The present embodiment provides an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, where the processor executes the program to implement the steps of the above-mentioned RHUB cascading type load sharing method executed by the BBU.

The present embodiment provides a non-transitory readable storage medium having stored thereon a computer program which, when executed by a processor, implements the steps of the above-described RHUB cascaded load sharing method performed by a BBU.

In the RHUB cascade type load sharing method executed by the BBU according to this embodiment, the uplink module of the RHUB is provided with at least two uplink optical ports, and the downlink module is provided with at least two downlink optical ports, so that the RHUB can receive downlink data through a plurality of uplink optical ports at the same time, and the traffic volume that the RHUB can process at the same time is increased. The connection module connected with the RHUB on the BBU is provided with at least two transmission optical ports, so that the BBU can transmit downlink data to the RHUB through the plurality of transmission optical ports simultaneously, and the traffic which can be processed by the BBU simultaneously is increased. Based on the BBU with a plurality of transmission optical ports and the RHUB distribution structure with a plurality of upper optical ports and lower optical ports, the requirement on service bearing capacity under the conditions of flexible networking and large-capacity coverage can be met, meanwhile, data congestion is avoided by shunting of downlink data through the plurality of optical ports, and the quality of service processing can be improved.

Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, and not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.

Claims

1. A radio remote hub RHUB is characterized by comprising an uplink module, a downlink module, an output module and a first processing module;

the output module is used for connecting at least one radio remote unit RRU;

the first processing module is used for receiving downlink data transmitted by the BBU through at least two uplink optical ports after an OM channel is established between the first processing module and the BBU, and sending the downlink data through the downlink module and/or the output module;

the first processing module is specifically configured to:

2. The RHUB of claim 1, wherein the determining of the cascade relationship of the primary optical port corresponding to the primary optical port in the upstream module and the cascade relationship of the secondary optical ports corresponding to the secondary optical ports in the upstream module comprises:

3. The RHUB of claim 1, wherein the first processing module is further configured to:

4. The RHUB of claim 1, wherein the first processing module is further configured to:

after an OM channel is established between the upstream optical interface and the BBU, if any abnormal third auxiliary optical port in the RHUB is monitored, judging whether the bandwidth allowance of a main optical port in the upstream module is larger than or equal to the occupied bandwidth of downlink data transmitted through the third auxiliary optical port, if so, using the downlink data transmitted by the third auxiliary optical port as aggregated data, and transmitting the aggregated data by the main optical port in the upstream module;

5. The RHUB of claim 1, wherein the first processing module is further configured to:

6. A BBU is characterized by comprising a connection module and a second processing module;

the second processing module is configured to transmit downlink data to the RHUB, which establishes an OM channel with the BBU in the cascade structure, through at least two transmission optical ports in the connection module;

the second processing module is specifically configured to:

the main optical port cascade relation determined by the first RHUB comprises a first connection relation between a main optical port in the first RHUB and a first lower optical port in the first RHUB and a second connection relation between the first lower optical port and a main optical port of a next-stage RHUB; the cascade relation of the auxiliary optical ports determined by the first RHUB comprises a third connection relation between any first auxiliary optical port in the first RHUB and a second lower optical port in the first RHUB and a fourth connection relation between the second lower optical port and a second auxiliary optical port in a next-stage RHUB.

7. The BBU of claim 6, wherein the second processing module is further to:

if the communication abnormality of the main optical port of the first RHUB is detected, setting the main optical port of the first RHUB and the main optical ports of all levels of RHUBs after the first RHUB in the cascade structure to be in an invalid state in the topological relation, and setting all auxiliary optical ports of a target RHUB and the auxiliary optical ports of all levels of RHUBs after the first RHUB in the cascade structure to be in an invalid state;

and if any third auxiliary optical port with communication abnormality in the first RHUB is detected, setting the third auxiliary optical port and each auxiliary optical port connected with the third auxiliary optical port in each stage of RHUB behind the first RHUB in the cascade structure to be in an invalid state.

8. The BBU of claim 6, wherein the second processing module is further to:

and if a third auxiliary optical port in an invalid state exists in the topological relation, deleting the third auxiliary optical port and downlink data to be transmitted distributed on each auxiliary optical port connected with the third auxiliary optical port in each stage of RHUB behind the third RHUB in the cascade structure.

9. The BBU of claim 6, wherein the second processing module is further to:

10. A RHUB cascaded load sharing system comprising a cascaded structure of a plurality of RHUBs in series as claimed in any one of claims 1 to 5, a BBU as claimed in any one of claims 6 to 9, and at least one RRU to which each RHUB is connected;

11. A RHUB cascading type load sharing method is characterized by comprising the following steps:

after any RHUB detects that an OM channel is established between the RHUB and a baseband processing unit (BBU), receiving downlink data transmitted by the BBU through at least two upper optical interfaces of the RHUB, and transmitting the downlink data through at least two lower optical interfaces of the RHUB and/or an output module connected with an RRU (remote radio unit) in the RHUB;

if any RHUB detects that an OM channel between the RHUB and the BBU is disconnected, controlling each upper optical connection port to send optical port information to the BBU, wherein the optical port information comprises an optical port identifier of the upper optical connection port and the stage number of the RHUB where the upper optical connection port is located in a cascade structure;

receiving main optical port information determined by the BBU according to the optical port information, and determining a main optical port from an upper optical port of an upper connection module according to the main optical port information, wherein the main optical port information comprises optical port information corresponding to the upper optical port serving as the main optical port;

12. A RHUB cascading type load sharing method is characterized by comprising the following steps:

wherein the cascade structure consists of a plurality of RHUBs connected in series;

a BBU connected with a cascade structure receives optical port information sent by each upper optical port in any first RHUB in the cascade structure, and takes the upper optical port corresponding to the first received optical port information as a main optical port in an upper connection module of the first RHUB to generate main optical port information, wherein the optical port information comprises an optical port identifier of the upper optical port and the number of stages of the first RHUB in the cascade structure; the main optical port information comprises optical port information corresponding to an upper coupling optical port serving as a main optical port;

sending the information of the main optical port to the first RHUB, receiving a main optical port cascade relation and an auxiliary optical port cascade relation determined by the first RHUB according to the information of the main optical port, and establishing a topological relation according to the main optical port cascade relation and the auxiliary optical port cascade relation determined by each RHUB in the cascade structure, wherein the topological relation comprises the connection relation of the main optical port in each RHUB in the cascade structure, the connection relation of the auxiliary optical port in each RHUB, the state of whether communication abnormality exists in each main optical port, and the state of whether communication abnormality exists in each auxiliary optical port, and the auxiliary optical port is an upper optical port except the main optical port in an upper connection module of the RHUB;