CN112714450B

CN112714450B - Method for networking pico-cell base station and method and device for managing network bandwidth

Info

Publication number: CN112714450B
Application number: CN202110323137.0A
Authority: CN
Inventors: 杨学金
Original assignee: Hangzhou H3C Technologies Co Ltd
Current assignee: Hangzhou H3C Technologies Co Ltd
Priority date: 2021-03-26
Filing date: 2021-03-26
Publication date: 2021-07-02
Anticipated expiration: 2041-03-26
Also published as: CN112714450A

Abstract

The specification provides a method for networking a pico-base station, a method for managing network bandwidth and a device, wherein the method comprises the following steps: and the plurality of FSWs are sequentially connected through interfaces to form an FSW chain, the head end FSW of the FSW chain is determined as a first FSW, the tail end FSW of the FSW chain is determined as a second FSW, and the BBU is respectively connected with the first FSW and the second FSW to form a ring-shaped networking. Through the method, the ring type networking of the pico base station can be established.

Description

Method for networking pico-cell base station and method and device for managing network bandwidth

Technical Field

The present disclosure relates to the field of wireless communications, and in particular, to a method for networking a pico-base station, and a method and an apparatus for managing a network bandwidth.

Background

The 5G extended pico station is composed of a BBU (Building Base band unit), an extension unit fsw (frontaul switch), and a remote radio unit pRRU. According to the standard specification, each BBU supports and connects 8 FSWs, each FSW supports and connects 8 pRRUs, and two-stage FSW cascade connection is supported maximally.

Disclosure of Invention

The invention provides a method for networking a pico-base station and a method and a device for managing network bandwidth, by which a 5G star + 2-level cascade networking mode can be expanded to an 8-level cascade ring networking mode. The requirement of optical cable resources can be reduced, and meanwhile, the cell bandwidth is dynamically adjusted, so that the system operation cannot be influenced when the optical fiber and the expansion unit are in failure.

The present disclosure provides a method for a pico-base station to perform a networking, where the pico-base station includes a baseband processing unit BBU, a plurality of extension units FSW, and a plurality of remote radio units pRRU, and the method includes:

sequentially connecting the FSWs through interfaces to form an FSW chain, and determining that a head FSW of the FSW chain is a first FSW and a tail FSW of the FSW chain is a second FSW;

the BBU is respectively connected with the first FSW and the second FSW, so that a ring-shaped networking is formed;

wherein each FSW has several prrus attached.

Specifically, the connecting of the FSWs in sequence through the interface to form the FSW chain specifically includes:

determining a head-end FSW from the FSWs, and connecting a second port of the head-end FSW with a first port of a downstream FSW;

determining a tail end FSW from a plurality of FSWs, and connecting a first port of the tail end FSW with a second port of an upstream FSW;

except the head-end FSW and the tail-end FSW, the first ports of the other FSWs are connected with the second port of the upstream FSW, and the second ports are connected with the first port of the downstream FSW.

Optionally, the first port of the FSW is a backhaul port, and the second port of the FSW is a cascade port.

According to the method, the 5G small-station star + 2-level cascade networking mode is expanded to an 8-level cascade ring networking mode, and the requirement of optical cable resources is reduced.

The present disclosure provides a method for managing network bandwidth, which is applied to a ring-type network of a pico-cell, and the ring-type network of the pico-cell includes: the method comprises the following steps that a baseband processing unit (BBU) and a plurality of extension units (FSWs) are sequentially connected through an interface to form an FSW chain, a head end FSW of the FSW chain is determined to be a first FSW, a tail end FSW of the FSW chain is determined to be a second FSW, and the BBU is respectively connected with the first FSW and the second FSW, and the method comprises the following steps:

determining a faulty FSW in the pico-base station ring-type networking, and taking the faulty FSW as a first target FSW, and taking a downstream FSW connected with the first target FSW as a second target FSW;

the first target FSW stops returning data for the downstream FSW;

and the second target FSW informs a downstream FSW connected with the second target FSW to use the cascade port as a return port, and sends a port conversion notice to the BBU through the downstream FSW, so that the BBU receives return data through the cascade port of the downstream FSW.

each FSW takes the port connected to the upstream FSW as a backhaul port and the port connected to the downstream FSW as a tandem port.

Optionally, the sending, by the downstream FSW, a port conversion notification to the BBU so that the BBU receives the return data through the cascade port of the downstream FSW specifically includes:

after the BBU receives the conversion notice, the BBU receives the second target FSW and the return data of the downstream FSW through the cascade port of the downstream FSW of the second target FSW.

Optionally, the method further includes: after the BBU receives the port conversion notice, the BBU respectively measures a first total bandwidth reaching a first target FSW and a second total bandwidth reaching a second target FSW;

if the first total bandwidth and/or the second total bandwidth reaches a threshold, then the total bandwidth to the first target FSW and/or to the second target FSW is reconfigured so that the adjusted total bandwidth is below the threshold.

By the method, the link \ bandwidth detection can be performed on the FSW aiming at the ring-shaped networking of the pico-cell, the link switching can be performed when the FSW is determined to have a fault, and the adaptive adjustment can be performed on the switched link bandwidth.

The present disclosure also provides a device for managing network bandwidth, which is applied to a ring-type network of a pico-station, where the ring-type network of the pico-station includes: the device comprises a baseband processing unit (BBU) and a plurality of extension units (FSWs), wherein the FSWs are sequentially connected through an interface to form an FSW chain, a head end FSW of the FSW chain is determined as a first FSW, a tail end FSW of the FSW chain is determined as a second FSW, the BBU is respectively connected with the first FSW and the second FSW, and the device comprises:

a determining module, configured to determine a faulty FSW in the pico-base station ring-type networking, and use the faulty FSW as a first target FSW, and use a downstream FSW connected to the first target FSW as a second target FSW;

the control module is used for controlling the first target FSW to stop returning data to the downstream FSW;

the control module is further configured to control the second target FSW to notify a downstream FSW connected to the second target FSW of using the cascade port as a backhaul port, and send a port conversion notification to the BBU through the downstream FSW, so that the BBU receives backhaul data through the cascade port of the downstream FSW.

Optionally, the control module is further configured to control the BBU to measure a first total bandwidth reaching the first target FSW and a second total bandwidth reaching the second target FSW, respectively, after receiving the port conversion notification;

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present specification and together with the description, serve to explain the principles of the specification.

Fig. 1 is a schematic diagram of a star-shaped networking structure of a pico-base station according to an embodiment of the disclosure.

Fig. 2 is a schematic flow chart of a method for networking a pico-base station according to an embodiment of the present disclosure.

Fig. 3 is a schematic diagram of a ring-shaped networking structure of a pico-base station according to an embodiment of the disclosure.

Fig. 4 is a flowchart illustrating a method for managing network bandwidth according to an embodiment of the present disclosure.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present specification. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the specification, as detailed in the appended claims.

The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the description. As used in this specification and the appended claims, the singular forms "a", "an", and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any and all possible combinations of one or more of the associated listed items.

It should be understood that although the terms first, second, third, etc. may be used herein to describe various information, these information should not be limited to these terms. These terms are only used to distinguish one type of information from another. For example, the first information may also be referred to as second information, and similarly, the second information may also be referred to as first information, without departing from the scope of the present specification. The word "if" as used herein may be interpreted as "at … …" or "when … …" or "in response to a determination", depending on the context.

At present, a 5G extended pico-station supports two-stage FSW cascade maximally, as shown in fig. 1, a BBU is connected with multiple FSWs in a star networking manner, 8 prrus (pico rrus) hung below each FSW are configured into 1 2T2R (2-transmitting and 2-receiving) 100MHz cell, and when an Option8 splitting manner is adopted, a 4.93Gbps bandwidth needs to be occupied, which is limited by that the transmission bandwidth between the BBU and the FSW is 25GHz in total, and theoretically, only 5 cascade can be supported maximally, and at present, 2-stage cascade is generally supported maximally.

Moreover, the existing extended pico-station only supports a star and cascade mixed networking mode, does not support extended unit ring networking, and can only support 2-level cascade to the maximum extent. The requirements of 8-level cascade and ring networking cannot be met.

The present disclosure provides a method for a pico-base station to form a network, as shown in fig. 2, the pico-base station includes a baseband processing unit BBU, a plurality of extension units FSW, and a plurality of remote radio frequency units pRRU, specifically:

s201, the FSWs are sequentially connected through interfaces to form an FSW chain, and the head end FSW of the FSW chain is determined as a first FSW, and the tail end FSW of the FSW chain is determined as a second FSW;

s202, the BBU is respectively connected with the first FSW and the second FSW, so as to form a ring type network.

Wherein each FSW has several prrus attached.

In this embodiment, the FSW is provided with a first port and a second port, and the first port and the second port are used for transmitting and receiving data to and from the outside. In a specific application, the first port may be set as a backhaul port for establishing a backhaul channel to send data of the FSW to the BBU, and the second port may be set as a cascade port for establishing a cascade channel to connect with the downstream FSW (i.e., the upstream FSW is connected with the backhaul port of the downstream FSW through the cascade port to form a FSW chain).

A head-end FSW and a tail-end FSW exist in an SFW chain formed by a plurality of FSWs through a first port and a second port, the head-end FSW and the tail-end FSW are determined, the BBU is connected by using the first port of the head-end FSW, and the BBU is connected by using the second port of the tail-end FSW, so that a ring-type networking structure of the pico-base station is formed.

In this embodiment, each FSW may connect multiple prrus to form a coverage cell.

To illustrate the solution in the present disclosure in detail, an embodiment of the present disclosure is further provided, as shown in fig. 3, a BBU is provided with an interface 1 and an interface 2 for forming a ring network structure with each FSW, the interface 1 on the FSW is set as a backhaul port for transmitting data to the BBU, the interface 2 bit cascade port on the FSW is set for cascading the FSW downstream, and the FSW4 in fig. 3 is exemplarily linked with two prrus (in practical application, more than two prrus may be connected).

In practical applications, the FSW may fail, for example, the BBU finds the link between FSW4 and FSW5 to be disconnected through link detection.

At this time, data of FSW1-FSW4 is returned to BBU through BBU interface 1, and data of FSW5-FSW8 is returned to BBU through BBU interface 2.

The BBU may measure data traffic of FSW1 to BBU interface 1 and FSW8 to BBU interface 2, and if FSW1 to BBU interface 1 and FSW1 to BBU interface 1 are measured to be 4.93 × 4=19.72Gbps, both interface data traffic may be less than 25Gbps, and each FSW may be configured as 1 cell of 2T2R 100MHz bandwidth.

In practical application, each FSW detects the link state with the previous FSW. And once a certain link is detected to be failed, immediately notifying the FSW cascaded with the FSW to adjust to another backhaul interface, notifying a BBU to evaluate the occupied bandwidth amount of backhaul data, and if the occupied bandwidth of a certain interface exceeds 25Gbps, starting a dynamic cell bandwidth adjustment process to reconfigure the pRRU under the FSW connected with the interface as a 2T2R 50MHz cell. Therefore, the system operation is not influenced when any optical fiber on the ring network is disconnected.

An embodiment of the present disclosure further provides a method for managing a network bandwidth, and as shown in fig. 4, the method is applied to a ring-type piconet station network, where the ring-type piconet station network includes: the method comprises the following steps that a baseband processing unit (BBU) and a plurality of extension units (FSWs) are sequentially connected through an interface to form an FSW chain, a head end FSW of the FSW chain is determined to be a first FSW, a tail end FSW of the FSW chain is determined to be a second FSW, and the BBU is respectively connected with the first FSW and the second FSW, and the method comprises the following steps:

s401, determining a faulty FSW in the pico-cell ring-type networking, and taking the faulty FSW as a first target FSW, and taking a downstream FSW connected with the first target FSW as a second target FSW;

s402, the first target FSW stops returning data for the downstream FSW;

s403, the second target FSW notifies a downstream FSW connected to the second target FSW to use the cascade port as a backhaul port, and sends a port conversion notification to the BBU through the downstream FSW, so that the BBU receives backhaul data through the cascade port of the downstream FSW.

In this embodiment, the method for ring-type networking of a pico-base station is based on the networking method provided in the foregoing embodiment, and details are not described in this embodiment.

In step S401, the link status with the preceding FSW is detected every time FSW, so that a first target FSW with a failure and a second target FSW downstream of the first target FSW can be determined. In other embodiments, link detection may be performed by the BBU to learn which FSW is failing.

In step S402, the first target FSW no longer passes back data for the cascaded second target FSW, but the data of the first target FSW can still be sent through the pass back port. Meanwhile, the notification can be sent to the BBU, so that the BBU only processes the data to the first target FSW.

In step S403, after the second target FSW detects that the second target FSW is disconnected from the first target FSW, the second target FSW may send data through the cascade port on the second target FSW, and meanwhile, the second target FSW may notify a downstream FSW connected to the second target FSW to send backhaul data through the cascade port, so that the downstream FSW sends the data of the second target FSW to the BBU.

And meanwhile, sending a notice to the BBU, so that the BBU receives data through a cascade port of the second target FSW.

Since the maximum rate of the 25G optical port can only reach 25G at present, in order to prevent the data amount from exceeding the supported processing amount of the device, in an embodiment, after the BBU receives the notification (the conversion notification), the BBU may measure a first total bandwidth reaching the first target FSW and a second total bandwidth reaching the second target FSW, respectively, and if the first total bandwidth and/or the second total bandwidth reach a threshold (25G), the total bandwidth reaching the first target FSW and/or reaching the second target FSW is reconfigured so that the adjusted total bandwidth is lower than the threshold.

To illustrate the present solution in detail, the present disclosure provides the following embodiments, as shown in figure 3,

the FSW1 detects that the link with FSW2 is broken and no longer passes back data for the cascaded FSW, but the FSW1 data still passes back normally through interface 1.

The FSW2 detects that the connection with the FSW1 is disconnected, and sends messages to the FSW3 and the FSW4 to inform the data transmission interface that the interface is changed from the interface 1 to the interface 2;

after the FSW3 and the FSW4 return interfaces are converted into interface 2, the FSW2 sends a return interface conversion notice to the BBU through each cascaded FSW, and the return interfaces are converted into BBU interface 2 from BBU interface 1;

the BBU receives the notification message, modifying BBU interface 1 to transmit only FSW1 data.

Starting an interface bandwidth calculation flow, and evaluating whether the data flow using the BBU interface 1 and the BBU interface 2 exceeds 25 Gbps;

BBU interface 1 only uses 1 FSW1, does not exceed 25Gbps bandwidth, and does not need to be adjusted.

The BBU interface 2 transmits data of 7 FSWs in total, namely FSW2-FSW8, the data traffic is 4.93 x 7=34.51Gbps and exceeds 25Gbps of the interface 2, the BBU initiates a dynamic adjustment flow, a cell bandwidth adjustment flow is sent to FSW2-FSW7, the cell bandwidth of the FSW2-FSW7 is reconfigured to be 2T2R 50MHz bandwidth, the data throughput of each cell is 4.93/2=2.465Gbps, the 7 FSWs in total are 2.465 x 7=17.255, and the requirement of being smaller than 25Gbps is met;

the FSW2-FSW7 forwards the cell bandwidth reconfiguration message to each pRRU, each pRRU reconfigures the bandwidth to be 50MHz, each cell occupies the bandwidth of 2.465Gbps, and the operation of the system is not influenced by the optical fiber fault.

After the optical fiber between the FSW1 and the FSW2 is recovered, the reverse process is executed, the FSW1-FSW4 is recovered again to return by using a BBU interface 1, and the FSW5-FSW8 returns by using a BBU interface 2;

if the BBU calculation bandwidth occupation can meet the requirement that each cell is configured to be 2T2R 100MHz, the original 50MHz cell is reconfigured to be a 100MHz cell.

It can be seen from the above embodiments that, in the case of FSW failure, when the backhaul data is sent through different links, the ring-type networking based on the pico-base station can detect the different links, thereby implementing automatic adjustment of the bandwidth and preventing the processing resources of the device from being exceeded.

The embodiment of the present disclosure further provides a device for managing network bandwidth, where the device is applied to a ring-type network of a pico-base station, and the ring-type network of the pico-base station includes: the device comprises a baseband processing unit (BBU) and a plurality of extension units (FSWs), wherein the FSWs are sequentially connected through an interface to form an FSW chain, a head end FSW of the FSW chain is determined as a first FSW, a tail end FSW of the FSW chain is determined as a second FSW, the BBU is respectively connected with the first FSW and the second FSW, and the device comprises:

Specifically, the control module is further configured to control the BBU to measure a first total bandwidth reaching the first target FSW and a second total bandwidth reaching the second target FSW, respectively, after receiving the port conversion notification;

The foregoing description has been directed to specific embodiments of this disclosure. Other embodiments are within the scope of the following claims. In some cases, the actions or steps recited in the claims may be performed in a different order than in the embodiments and still achieve desirable results. In addition, the processes depicted in the accompanying figures do not necessarily require the particular order shown, or sequential order, to achieve desirable results. In some embodiments, multitasking and parallel processing may also be possible or may be advantageous.

Other embodiments of the present description will be apparent to those skilled in the art from consideration of the specification and practice of the invention disclosed herein. This specification is intended to cover any variations, uses, or adaptations of the specification following, in general, the principles of the specification and including such departures from the present disclosure as come within known or customary practice within the art to which the specification pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the specification being indicated by the following claims.

It will be understood that the present description is not limited to the precise arrangements described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present description is limited only by the appended claims.

The above description is only a preferred embodiment of the present disclosure, and should not be taken as limiting the present disclosure, and any modifications, equivalents, improvements, etc. made within the spirit and principle of the present disclosure should be included in the scope of the present disclosure.

Claims

1. A method for managing network bandwidth, wherein the method is applied to a pico-base station ring network, and the pico-base station ring network comprises: the method comprises the following steps that a baseband processing unit (BBU) and a plurality of extension units (FSWs) are sequentially connected through an interface to form an FSW chain, a head end FSW of the FSW chain is determined to be a first FSW, a tail end FSW of the FSW chain is determined to be a second FSW, and the BBU is respectively connected with the first FSW and the second FSW, and the method comprises the following steps:

the first target FSW stops returning data for the downstream FSW;

and the second target FSW informs a downstream FSW connected with the second target FSW of using the cascade port as a return port, and sends a port conversion notice to the BBU through the downstream FSW connected with the second target FSW, so that the BBU receives return data through the cascade port of the downstream FSW connected with the second target FSW.

2. The method of claim 1, wherein the FSWs are sequentially connected by an interface to form a FSW chain, specifically comprising:

3. The method according to claim 1, wherein the sending a port transition notification to the BBU via the downstream FSW connected to the second target FSW, so that the BBU receives the backhaul data via a cascade port of the downstream FSW connected to the second target FSW, specifically includes:

4. The method of claim 3, further comprising:

after the BBU receives the port conversion notice, the BBU respectively measures a first total bandwidth reaching a first target FSW and a second total bandwidth reaching a second target FSW;

5. An apparatus for managing network bandwidth, the apparatus being applied in a ring-type network of a pico-station, the ring-type network of the pico-station comprising: the device comprises a baseband processing unit (BBU) and a plurality of extension units (FSWs), wherein the FSWs are sequentially connected through an interface to form an FSW chain, a head end FSW of the FSW chain is determined as a first FSW, a tail end FSW of the FSW chain is determined as a second FSW, the BBU is respectively connected with the first FSW and the second FSW, and the device comprises:

the control module is further configured to control the second target FSW to notify a downstream FSW connected to the second target FSW of using the cascade port as a backhaul port, and send a port conversion notification to the BBU through the downstream FSW connected to the second target FSW, so that the BBU receives backhaul data through the cascade port of the downstream FSW connected to the second target FSW.

6. The apparatus of claim 5, wherein the FSWs are sequentially connected via an interface to form a FSW chain, specifically comprising:

7. The apparatus of claim 5,

the control module is further configured to control the BBU to measure a first total bandwidth reaching the first target FSW and a second total bandwidth reaching the second target FSW, respectively, after receiving the port conversion notification;