CN106470072B - Optical interface resource allocation method and device for cascade device in base station, base station and communication system - Google Patents
Optical interface resource allocation method and device for cascade device in base station, base station and communication system Download PDFInfo
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Abstract
The invention provides a method and a device for configuring optical interface resources of a cascade device in a base station, the base station and a communication system, wherein the optical interface resource configuration information of each cascade device is determined based on the optical interface rate of each cascade device and the data volume information borne by each cascade device; and configuring the optical interface resource configuration information to each stage of cascade device so that the corresponding cascade device configures the optical interface resource according to the optical interface resource configuration information. Therefore, the reasonable and effective configuration of the optical interface resources in the cascade RRU link can be realized, the waste of the optical interface resources is avoided, and the cost of the base station equipment is effectively reduced.
Description
Technical Field
The present invention relates to the field of communication technologies, and in particular, to a method and an apparatus for configuring optical interface resources of a cascade device in a base station, and a communication system.
Background
In a wireless communication system, a radio access network is constituted by NodeB (base station). The NodeB is composed of a BBU (base band Unit, indoor baseband processing Unit) and an RRU (Radio Remote Unit), as shown in fig. 1. The BBU and the RRU are generally connected through optical fibers or cables, and signaling and data interaction between the BBU and the RRU are realized.
The most common networking modes between the BBU and the RRU are a star networking mode and a cascade networking mode.
The star networking mode is as shown in fig. 2, n RRU modules (202, 203, 204 in the figure) are hung under the BBU module 201, and the star networking mode is significantly characterized in that an optical port OPT0 on each RRU module is directly connected with a BBU optical port through an optical fiber or a cable.
The cascade networking mode is as shown in fig. 3, n RRU modules (302, 303, 304 in the figure) are hung under an optical port P0 hung under a BBU module 301, and the cascade networking is significantly characterized in that an upper optical port OPT0 of a first-stage RRU module 302 is connected with a BBU optical port P0, an upper optical port OPT0 of a second-stage RRU module 302 is connected with a lower optical port OPT1 of the first-stage RRU module 301, and so on. Compared with a star connection networking mode, the cascade networking mode saves optical fiber resources.
In the existing cascade technology, the uplink and downlink optical port rates of each stage of RRUs on the same link are kept consistent with the BBU optical port rate through an optical port rate adaptive technology, the rates of the uplink optical port OPT0 of the RRU module 302 and the BBU module optical port P0 in fig. 3 are kept consistent, the uplink optical port OPT0 of the RRU module 303 and the downlink optical port OPT1 of the RRU module 302 are kept consistent, and so on.
In fact, in fig. 3, since data information between the RRU module 302, the RRU module 303, the RRU module 304, and the BBU module 301 is carried on the optical fiber between the RRU module 302 and the BBU module 301, information between the RRU module 303, the RRU module 304, and the BBU module 301 is carried between the RRU module 303 and the RRU module 302, and information between the RRU module 304 and the BBU module 301 is carried on the optical fiber between the RRU module 304 and the RRU module 303, the RRU module closer to the BBU module 301 has heavier optical port pressure, and the RRU module farther from the BBU module 301 has lighter optical port pressure.
The existing RRU cascade technology requires that the optical interface rates of all levels of RRUs on the same link are kept consistent, so that huge waste of module optical interface resources is caused on one hand; on the other hand, when the low optical interface rate RRU and the high optical interface rate RRU are cascaded, the improvement of the whole link rate is finally limited by the low optical interface rate RRU.
Disclosure of Invention
The invention provides a method and a device for allocating optical interface resources of a cascade device in a base station, the base station and a communication system, which can realize reasonable and effective allocation of the optical interface resources in a cascade RRU link, avoid the waste of the optical interface resources and effectively reduce the cost of base station equipment.
The scheme provided by the invention is as follows:
the embodiment of the invention provides a method for allocating optical interface resources of a cascade device in a base station, which comprises the following steps:
determining the optical interface resource configuration information of each stage of cascade device based on the optical interface rate of each stage of cascade device and the data volume information carried by each stage of cascade device;
and configuring the optical interface resource configuration information to each stage of cascade device so that the corresponding cascade device configures the optical interface resource according to the optical interface resource configuration information.
Preferably, the cascade device includes a BBU and a plurality of cascaded RRUs, and a first stage RRU of the plurality of cascaded RRUs is connected to the BBU.
Preferably, before determining the optical interface resource configuration information of each stage of cascaded devices, the method further includes:
determining the optical port rate of each stage of cascade device based on the obtained topological relation of the cascade device, wherein the topological relation comprises the number of cascaded RRUs, the position relation of each stage of RRU in a cascade link, and the optical port resource required by each stage of RRU, and the optical port rate of the cascade device comprises the optical port rate of BBU and the downstream optical port rate of each stage of RRU.
Preferably, the determining the optical port rate of each stage of the cascaded device based on the obtained topological relation of the cascaded device includes:
based on the formula:
calculating optical interface resources required by each stage of RRU, wherein M is the number of cells borne by the RRU, A is the number of antennas of each cell, S is the sampling rate of each cell and the data bit width of each sampling point of B, 10/8 is optical interface redundancy brought by 8B10B coding, and 16/15 is redundancy brought by control words;
and determining the optical interface rate of each stage of cascade device in the cascade link based on the optical interface rate of the current cascade device being more than or equal to the sum of optical interface resources required by all cascade devices positioned behind the current cascade device in the cascade link.
Preferably, the uplink optical interface of the RRU in the cascade link is the same as the downlink optical interface of the upper RRU or the optical interface of the BBU.
Preferably, the method further comprises:
acquiring data resources needing to be transmitted from a baseband module of a BBU;
and according to the optical interface resource configuration information, placing the data resource in a container corresponding to the optical interface resource.
Preferably, the method further comprises:
and each stage of RRU moves the data carried by the RRU in the data received by the upper connection optical port to the radio frequency module of the RRU based on the optical port resource configuration information, and moves the data carried by other RRUs in the data received by the upper connection optical port to the corresponding container in the lower connection optical port of the RRU according to the optical port resource configuration information.
The embodiment of the present invention further provides a device for allocating optical interface resources of a cascade device in a base station, including:
the optical interface resource allocation module is used for determining the optical interface resource configuration information of each stage of cascade device based on the optical interface rate of each stage of cascade device and the data volume information borne by each stage of cascade device;
and the configuration module is used for configuring the optical interface resource configuration information to each stage of cascade device so as to enable the corresponding cascade device to configure the optical interface resource according to the optical interface resource configuration information.
Preferably, the apparatus further comprises:
and the optical port rate calculation module is used for determining the optical port rate of each stage of cascaded device based on the obtained topological relation of the cascaded devices, wherein the topological relation comprises the number of cascaded RRUs, the position relation of each stage of RRU in a cascaded link, and the optical port resources required by each stage of RRU, and the optical port rate of the cascaded devices comprises the optical port rate of BBU and the downlink optical port rate of each stage of RRU.
Preferably, the optical port velocity calculation module includes:
an optical interface resource calculation unit for calculating, based on the formula:
calculating optical interface resources required by each stage of RRU, wherein M is the number of cells borne by the RRU, A is the number of antennas of each cell, S is the sampling rate of each cell and the data bit width of each sampling point of B, 10/8 is optical interface redundancy brought by 8B10B coding, and 16/15 is redundancy brought by control words;
and the optical interface rate determining unit is used for determining the optical interface rate of each stage of cascade device in the cascade link based on the fact that the optical interface rate of the current cascade device is greater than or equal to the sum of optical interface resources required by all cascade devices positioned behind the current cascade device in the cascade link.
The embodiment of the invention also provides a BBU, and the BBU comprises the optical interface resource allocation device of the cascade device in the base station provided by the embodiment of the invention.
Preferably, the BBU further comprises:
the device comprises an optical port rate calculation module, a baseband module and an optical port resource exchange module; wherein:
the optical interface rate calculation module is used for determining the optical interface rate of each stage of cascaded device based on the obtained topological relation of the cascaded devices, wherein the topological relation comprises the number of cascaded RRUs, the position relation of each stage of RRU in a cascaded link, and the optical interface resources required by each stage of RRU, and the optical interface rate of the cascaded devices comprises the optical interface rate of BBU and the downstream optical interface rate of each stage of RRU;
and the optical interface resource exchange module is used for acquiring the data resource to be transmitted from the baseband module and placing the data resource in a container corresponding to the optical interface resource according to the optical interface resource configuration information.
The embodiment of the invention also provides an RRU, and the BBU comprises the optical interface resource allocation device of the cascade device in the base station provided by the embodiment of the invention.
Preferably, the RRU further comprises:
the system comprises an optical port rate calculation module, a local optical port resource exchange module, a middle radio frequency module and a lower optical port resource exchange module; wherein:
the optical interface rate calculation module is used for determining the optical interface rate of each stage of cascaded device based on the obtained topological relation of the cascaded devices, wherein the topological relation comprises the number of cascaded RRUs, the position relation of each stage of RRU in a cascaded link, and the optical interface resources required by each stage of RRU, and the optical interface rate of the cascaded devices comprises the optical interface rate of BBU and the downstream optical interface rate of each stage of RRU;
the local optical interface resource exchange module is used for moving the data borne by the RRU in the data received by the upper connection optical interface to the radio frequency module based on the optical interface resource configuration information;
and the lower optical interface resource exchange module is used for moving the data borne by other RRUs in the data received by the upper optical interface to a container corresponding to the lower optical interface resource according to the optical interface resource configuration information.
Preferably, the upper optical interface of the RRU is the same as the lower optical interface of the upper RRU or the optical interface of the BBU.
The embodiment of the invention also provides a base station, and the base station can specifically comprise the BBU or the RRU provided by the embodiment of the invention.
The embodiment of the present invention further provides a communication system, which may specifically include the base station provided in the embodiment of the present invention.
From the above, the method and apparatus for configuring optical interface resources of a cascade device in a base station, the base station, and the communication system provided by the present invention determine the optical interface resource configuration information of each stage of cascade device based on the optical interface rate of each stage of cascade device and the data amount information carried by each stage of cascade device; and configuring the optical interface resource configuration information to each stage of cascade device so that the corresponding cascade device configures the optical interface resource according to the optical interface resource configuration information. Therefore, the reasonable and effective configuration of the optical interface resources in the cascade RRU link can be realized, the waste of the optical interface resources is avoided, and the cost of the base station equipment is effectively reduced.
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 only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 shows a prior art schematic diagram one;
FIG. 2 shows a prior art schematic diagram two;
FIG. 3 shows a prior art schematic diagram three;
fig. 4 is a schematic flow chart of a method for configuring optical interface resources of a cascade device in a base station according to an embodiment of the present invention;
fig. 5 is a first schematic structural diagram of an optical interface resource allocation apparatus for a cascade device in a base station according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of a second apparatus for allocating optical interface resources of a cascade device in a base station according to an embodiment of the present invention;
fig. 7 is a schematic structural diagram of an optical port velocity calculation module according to an embodiment of the present invention;
FIG. 8 is a first BBU structure provided by an embodiment of the present invention;
FIG. 9 is a schematic diagram II of the BBU structure provided by the embodiment of the present invention;
fig. 10 is a first schematic structural diagram of an RRU according to an embodiment of the present invention;
fig. 11 is a schematic diagram of a RRU structure provided in the embodiment of the present invention;
fig. 12 is a third schematic structural diagram of an optical interface resource allocation apparatus for a cascade device in a base station according to an embodiment of the present invention;
fig. 13 is a fourth schematic structural diagram of an optical interface resource allocation apparatus for a cascade device in a base station according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention, are within the scope of the invention.
Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs. The use of "first," "second," and similar terms in the description and claims of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. Also, the use of the terms "a" or "an" and the like do not denote a limitation of quantity, but rather denote the presence of at least one. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships are changed accordingly.
An embodiment of the present invention provides a method for allocating optical interface resources of a cascade device in a NodeB (base station), as shown in fig. 4, the method may specifically include:
step 401, determining optical port resource configuration information of each level of cascade device based on the optical port rate of each level of cascade device and data amount information carried by each level of cascade device;
The method for allocating optical interface resources of a cascade device in a NodeB provided in the embodiments of the present invention dynamically allocates corresponding optical interface resources to each cascade device based on data resources actually required to be carried by each level of cascade device node in a cascade mode, thereby implementing reasonable and effective allocation of optical interface resources in a cascade link in the NodeB, and avoiding waste of optical interface resources.
Due to the technical scheme provided by the embodiment of the invention, the optical interface module resource allocation can be reasonably and effectively realized, so that the requirements of NodeB wireless equipment on the optical interface module and light can be effectively reduced, and the cost of base station equipment can be effectively reduced.
The cascade device according to the embodiment of the present invention may specifically include a BBU related to a NodeB and a plurality of cascaded RRUs, where an upper optical connection port of a first stage RRU in the plurality of cascaded RRUs is connected to an optical connection port of the BBU. In another particular embodiment, the cascaded device may also be a plurality of cascaded BBUs.
Before determining the configuration information of the optical interface resource of each stage of the cascade device, the method provided by the embodiment of the present invention may further include:
acquiring a topological relation of a cascade device, wherein the topological relation comprises the number of cascaded RRUs, the position relation of each stage of RRU in a cascade link and optical interface resources required by each stage of RRU;
and determining the optical port rate of each stage of cascade device based on the topological relation of the cascade device, wherein the optical port rate of the cascade device comprises the optical port rate of BBU and the downstream optical port rate of each stage of RRU.
In a specific embodiment, the step of calculating the optical port rate of each stage of the cascaded devices based on the topological relation of the cascaded devices may specifically include:
based on the formula:
calculating the optical interface resources required by each stage of RRU, wherein M is the number of cells borne by the RRU, A is the number of antennas of each cell, S is the sampling rate of each cell and the data bit width of each sampling point of B, 10/8 is the optical interface redundancy brought by 8B10B coding, and 16/15 is the redundancy brought by control words;
and determining the optical interface rate of each stage of cascade device in the cascade link based on the fact that the optical interface rate of the current cascade device is greater than or equal to the sum of optical interface resources required by all cascade devices positioned behind the current cascade device in the cascade link.
In the embodiment of the present invention, the uplink optical interface of the RRU in the cascade link may be based on an optical interface rate adaptive technique, and is the same as the downlink optical interface rate of the upper stage RRU or the optical interface rate of the BBU.
In the embodiment of the present invention, the data resources to be transmitted in the cascade link may be specifically acquired from the baseband module in the BBU by the optical interface resource exchange module in the BBU, and the optical interface resource exchange module in the BBU places the data resources in the container corresponding to the optical interface according to the optical interface resource configuration information.
In the data transmission process, each stage of RRUs can move the data carried by the stage of RRU in the data received by the upper optical interface to the radio frequency module in the stage of RRU based on the optical interface resource configuration information, and move the data carried by other RRUs in the data received by the upper optical interface to the corresponding container in the lower optical interface according to the optical interface resource configuration information.
The embodiment of the present invention further provides a device for allocating optical port resources of a cascade device in a NodeB, as shown in fig. 5, where the device specifically includes:
an optical interface resource allocation module 501, configured to determine optical interface resource configuration information of each level of cascaded devices based on an optical interface rate of each level of cascaded devices and data information carried by each level of cascaded devices;
the configuration module 502 is configured to configure the optical interface resource configuration information to each stage of cascaded devices, so that the corresponding cascaded device configures the optical interface resource according to the optical interface resource configuration information.
The implementation of the optical interface resource allocation device of the cascade device in the NodeB provided by the embodiment of the present invention can also implement reasonable and effective allocation of optical interface resources in the cascade link in the NodeB, thereby avoiding waste of optical interface resources and effectively reducing the cost of the base station equipment.
In a specific embodiment, as shown in fig. 6, the apparatus may further include:
an optical port rate calculating module 503, configured to determine an optical port rate of each stage of the cascaded device based on the obtained topological relation of the cascaded device, where the topological relation includes the number of cascaded RRUs, the position relation of each stage of the RRUs in a cascaded link, and an optical port resource required by each stage of the RRUs, and the optical port rate of the cascaded device includes an optical port rate of a BBU and a downlink optical port rate of each stage of the RRUs.
In a specific embodiment, as shown in fig. 7, the optical port rate calculating module 503 may specifically include:
an optical port resource calculation unit 5031 configured to:
calculating the optical interface resource required by each stage of RRU, wherein M is the number of cells borne by the RRU,A is the number of antennas of each cell, S is the sampling rate of each cell, and the data bit width of each sampling point of B, 10/8 is the optical interface redundancy brought by 8B10B coding, and 16/15 is the redundancy brought by control words;
an optical port rate determining unit 5032, configured to determine an optical port rate of each level of the cascaded device in the cascaded link based on that the optical port rate of the current cascaded device is greater than or equal to a sum of optical port resources required by all cascaded devices located after the current cascaded device in the cascaded link.
The optical interface resource allocation device of the cascade device in the NodeB provided by the embodiment of the present invention may specifically exist in the NodeB as an independent device, and is electrically connected to the BBU and the RRU inside the NodeB. In addition, the device can also be integrally arranged inside the BBU or the RRU, or each function module related in the device can be respectively arranged in the BBU or the RRU, and each set function is electrically connected with each other to realize information interaction.
When the device is arranged on the BBU, the embodiment of the invention also provides the BBU, and the BBU is connected with the first-stage RRUs in the plurality of cascaded RRUs.
As shown in fig. 8, the BBU may specifically include:
an optical interface resource allocation module 801, configured to determine optical interface resource configuration information of each level of cascaded devices based on an optical interface rate of each level of cascaded devices and data information carried by each level of cascaded devices;
the configuration module 802 is configured to configure the optical interface resource configuration information to each level of cascaded devices, so that the corresponding cascaded device configures the optical interface resource according to the optical interface resource configuration information.
In a specific embodiment, as shown in fig. 9, the BBU may further include: an optical port rate calculation module 803, an optical port resource exchange module 804, and a baseband module 805; wherein:
an optical port rate calculation module 803, configured to determine an optical port rate of each stage of the cascaded device based on an obtained topological relationship of the cascaded device, where the topological relationship includes the number of cascaded RRUs, a position relationship of each stage of the RRUs in a cascaded link, and an optical port resource required by each stage of the RRUs, and the optical port rate of the cascaded device includes an optical port rate of a BBU and a downstream optical port rate of each stage of the RRUs;
an optical interface resource exchanging module 804, configured to obtain a data resource to be transmitted from the baseband module 805, and place the data resource in a container corresponding to an optical interface according to optical interface resource configuration information.
When the device is arranged on an RRU, the embodiment of the present invention further provides an RRU, which is cascaded with other RRUs, and a first stage RRU in the plurality of cascaded RRUs is connected with a BBU.
As shown in fig. 10, the RRU may specifically include:
an optical interface resource allocation module 1001, configured to determine optical interface resource configuration information of each stage of the cascaded device based on an optical interface rate of each stage of the cascaded device and data information carried by each stage of the cascaded device;
the configuring module 1002 is configured to configure the optical interface resource configuration information to each stage of the cascade device, so that the corresponding cascade device configures the optical interface resource according to the optical interface resource configuration information.
In a specific embodiment, as shown in fig. 11, the RRU may further include: an optical port rate calculation module 1003, a local optical port resource exchange module 1004, a middle radio frequency module 1005 and a lower optical port resource exchange module 1006; wherein:
an optical port rate calculation module 1003, configured to determine an optical port rate of each stage of cascaded device based on an obtained topological relationship of the cascaded device, where the topological relationship includes the number of cascaded RRUs, a position relationship of each stage of RRUs in a cascaded link, and an optical port resource required by each stage of RRUs, and the optical port rate of the cascaded device includes an optical port rate of a BBU and a downstream optical port rate of each stage of RRUs;
a local optical interface resource exchanging module 1004, configured to move, based on the optical interface resource configuration information, data carried by the RRU in the data received by the uplink optical interface to the radio frequency module 1005;
and the lower optical interface resource exchanging module 1006 is configured to move data carried by other RRUs in the data received by the upper optical interface to a corresponding container in the lower optical interface according to the optical interface resource configuration information.
In this embodiment of the present invention, the rate of the upper optical interface (for example, OPT0 in fig. 12 and 13) of the RRU is the same as the rate of the lower optical interface (for example, OPT1 in fig. 12 and 13) of the RRU at the upper stage, or the rate of the optical interface is the same as the rate of the optical interface of the BBU.
Specifically, the RRU may configure the rate of the upper optical interface of the RRU to be the lower optical interface rate of the upper RRU or the same as the optical interface rate of the BBU by using an optical interface rate adaptive technique.
In order to implement the technical solution provided by the embodiment of the present invention, only two problems need to be solved:
the first problem is that: the problem of optical port rate configuration;
the second problem is that: the problem of resource allocation of optical ports of RRUs at all levels;
in order to solve the two technical problems, the basic idea of the invention is as follows:
for the optical port rate configuration problem: the optical port rate of the BBU module and the downstream optical port rate of each RRU module according to the embodiments of the present invention may be determined by the optical port rate calculation module 503 (or 803 or 1003) through calculation, and the optical port rate configuration of the BBU module and each RRU downstream optical port (OPT1) is completed through the configuration module 502 (or 802 or 1002);
for the problem of resource allocation of optical ports of each stage of RRU: the local optical interface resource exchanging module of each stage of RRU is responsible for moving the data resource on the uplink optical interface to the middle radio frequency module 1005 of the local stage of RRU according to the configuration information issued by the configuration module 502 (or 802 or 1002), and the lower optical interface resource exchanging module 1006 of each stage of RRU is responsible for moving the data resource of the uplink optical interface to the downlink optical interface according to the configuration information issued by the configuration module 502 (or 802 or 1002).
The following detailed description of the embodiments of the present invention will be made with reference to the accompanying drawings:
fig. 12 is a schematic diagram of an embodiment of the present invention, in which an optical interface resource allocation apparatus of a tandem device in a NodeB is integrally disposed in a BBU.
Then, the flow steps specifically included in this embodiment are as follows:
step 1: the network management module 1201 configures the topology (topo) relationship between the BBU1202 and the RRUs (1203, 1204, 1205) (including the number of cascaded RRUs hung under a certain optical port of the BBU, the position relationship of each stage of RRUs in the cascaded link, and the optical port resources required by each stage of RRUs) to the optical port rate calculation module 1221.
Step 2: the optical port rate calculation module 1221 calculates the optical port rate of the BBU1202 and the rate of the downstream optical port OPT1 of each RRU (1203, 1204, 1205) according to the topological relation.
As shown in fig. 12, in this embodiment, 3 cascaded RRUs (1203, 1204, 1205) are connected below a certain optical port of the BBU1202, and the optical port rate calculation module 1221 is configured to calculate that the data amount carried on the RRU1203 is AB, the data amount carried on the RRU1204 is CD, and the data amount carried on the RRU1205 is EF, so the optical port rate of the BBU1202 is the lowest rate a capable of accommodating ABCDEF, the optical port rate of the RRU1203 downstream optical port OPT1 is the lowest rate b capable of accommodating CDEF, and the optical port rate of the RRU1204 downstream optical port OPT1 is the rate c capable of accommodating EF.
In the embodiment of the invention, the principle of calculating the optical port rates (a, b and c) is as follows:
if the optical interface resource required by each RRU is X, X is determined by the number M of cells carried on the RRU, the number ANTNUMm of antennas of each cell, the sampling rate samplerateme of each cell, and the data bit width bitridth of each sampling point, and specifically, as shown in formula 1, 10/8 is optical interface redundancy brought by 8B10B coding, and 16/15 is redundancy brought by control words:
Suppose that the optical interface resource required by the RRU1205 is calculated by formula 1 to be X2, the optical interface resource required by the RRU1204 is X1, and the optical interface resource required by the RRU1203 is X0.
Then:
the optical port rate a of the BBU1202 should satisfy:
a > -X0 + X1+ X2 formula 2
The downstream optical interface rate b of the RRU1203 should satisfy:
b > -X1 + X2 formula 3
The RRU1204 downstream optical interface rate c should satisfy:
c > -X2 equation 4
Based on the above principle, the optical interface rate of the BBU1202 and the downstream optical interface rates of each stage of RRUs are determined in step 2.
And step 3: the optical interface resource allocation module 1222 calculates, according to the optical interface rate of the downstream optical interface and BBU1202 of each RRU (1203, 1204, 1205) and the data amount information, i.e., carrier information, carried on each RRU, which are calculated and determined in step 2, optical interface resource configuration information configured to each RRU local optical interface resource exchange module (e.g., 1232, 1242, 1252), each RRU subordinate optical interface resource exchange module (e.g., 1233, 1243, 1253), and the optical interface resource exchange module 1225 of the BBU 1202.
The concrete steps can be as follows:
1. the configuration information of the optical interface resource exchange module 1225 in the BBU1202 is:
when the BBU optical port rate is a, there are 6 total containers (1, 2, 3, 4, 5, 6), and the data resource A, B configured for the RRU1203 is placed at the 1, 2 positions of the containers; data resource C, D configured for RRU1204 is placed in the 3, 4 locations of the container; data resource E, F configured for RRU1205 is placed in the 5, 6 position of the container.
2. The configuration information of the local optical interface resource exchange module 1232 of the RRU1203 is:
extracting data A, B with numbers of 0 and 1 from an optical port OPT0 on an RRU1203, and sending the data to a middle radio frequency module 1231;
the configuration information of the lower optical port resource exchanging module 1233 of the RRU1203 is:
when the rate of the lower optical port OPT1 of the RRU1203 is b, 4 containers (1, 2, 3, 4) are totally provided, and the data C, D, E, F numbered with numbers 3, 4, 5, 6 in the container with the rate of the upper optical port OPT0 of the RRU1203 being a is moved to the positions numbered with numbers 1, 2, 3, 4 in the container with the rate of the lower optical port being b.
3. The configuration information of the local optical interface resource exchanging module 1242 of the RRU1204 is:
extracting data C, D with numbers 1 and 2 from an optical port OPT0 on the RRU1204, and sending the data to the middle radio frequency module 1241;
the configuration information of the lower optical port resource exchanging module 1243 of the RRU1204 is:
when the speed of the lower optical port OPT1 of the RRU1204 is c, 2 containers (1, 2) are totally provided, and the data E, F numbered as 3 and 4 in the container with the speed b of the upper optical port OPT0 of the RRU1204 is moved to the positions numbered as 1 and 2 in the container with the speed c of the lower optical port.
4. The configuration information of the local optical interface resource exchanging module 1242 of the RRU1205 is:
data E, F numbered 1 and 2 are extracted from an optical port OPT0 on the RRU1205 and sent to the intermediate radio frequency module 1251.
And 4, step 4: the configuration module 1223 configures the optical interface resource configuration information generated in step 3 to the BBU1202 and the RRU (1203, 1204, 1205), so that the corresponding cascade device configures the optical interface resource according to the optical interface resource configuration information.
Further, in this step, the configuration module 1223 may also directly configure the optical interface rate of the BBU1202 as a, configure the rate of the downstream optical interface OPT1 of the RRU1203 as b, and configure the rate of the downstream optical interface OPT1 of the RRU1204 as c based on the optical interface resource configuration information.
And 5: an optical port OPT0 on an RRU1203 is adapted to an optical port rate a of the BBU1202 through an optical port rate self-adaption technology; an upper optical port OPT0 of the RRU1204 is adapted to the rate b of a lower optical port OPT1 of the RRU1203 by an optical port rate self-adaption technology; the upper optical port OPT0 of the RRU1205 is adapted to the rate c of the lower optical port OPT1 of the RRU1204 module by an optical port rate adaptation technique.
Step 6: the optical interface resource exchange module 1225 in the BBU acquires the data resource to be transmitted from the baseband module 1224, and moves the acquired data resource (A, B, C, D, E, F) to the corresponding container with the optical interface rate a (i.e., the 1, 2, 3, 4, 5, 6 positions) based on the optical interface resource configuration information, so as to implement data delivery.
Step 7, the local optical interface resource exchanging module 1232 of the RRU1203 extracts the data A, B with numbers 0 and 1 from the optical interface OPT0 on the RRU1203, and sends the data to the middle rf module 1231. The lower optical port resource exchanging module 1233 of the RRU1203 moves the data C, D, E, F numbered 3, 4, 5, and 6 in the container with the speed a of the upper optical port OPT0 of the RRU1203 to the positions numbered 1, 2, 3, and 4 in the container with the speed b of the lower optical port, and issues the data.
Step 8, the local optical port resource exchanging module 1242 of the RRU1204 extracts the data C, D numbered 1 and 2 from the optical port OPT0 on the RRU1204, and sends the data to the middle radio frequency module 1241; the lower optical port resource exchanging module 1243 of the RRU1204 moves the data E, F numbered 3 and 4 in the container with the speed b of the upper optical port OPT0 of the RRU1204 to the positions numbered 1 and 2 in the container with the speed c of the lower optical port, and then sends the data down.
Step 9, the local optical interface resource exchanging module 1242 of the RRU1205 extracts the data E, F numbered 1 and 2 from the optical interface OPT0 on the RRU1205 and sends the data to the middle radio frequency module 1251.
The implementation of the embodiment can realize reasonable and effective configuration of the optical interface resources in the cascaded RRU link, avoid the waste of the optical interface resources and effectively reduce the cost of the base station equipment.
In fact, the RRU may also have an optical port rate calculation module and an optical port resource allocation module inside, as shown in fig. 13. Then, the specific implementation of the second embodiment includes the following steps:
step 1: the network management module 1301 configures a topology (topo) relationship between the BBU1302 and the RRUs (1303, 1304, 1305) (including the number of cascaded RRUs hung under a certain optical port of the BBU1302, a position relationship of each stage of RRUs in a cascaded link, and optical port resources required by each stage of RRUs) to an optical port rate calculation module (including an optical port rate calculation module 1321 disposed in the BBU1302 and optical port rate calculation modules 1334, 1344, 1354 disposed in the cascaded RRUs, respectively).
Step 2: the optical port rate calculation module 1321 calculates the optical port rate a of the BBU1302 according to the topological relation, the optical port rate calculation module 1334 calculates the optical port rate b of the RRU1303 downstream according to the topological relation, and the optical port rate calculation module 1344 calculates the optical port rate c of the RRU1304 downstream according to the topological relation.
For the specific calculation process, refer to the calculation processes of the above equations 1, 2, 3, and 4, and are not described herein again.
And step 3: the optical interface resource allocation module 1322 calculates, according to the optical interface rate a of the BBU1302 obtained by the optical interface rate calculation module 1321 and the data amount information and the like carried on each RRU, the optical interface resource configuration information that needs to be sent to the optical interface resource exchange module 1325 in the BBU1302 and the local optical interface resource exchange module 1332 of the RRU1303 in close proximity to the BBU 1302.
The optical interface resource configuration information of the optical interface resource exchanging module 1325 is:
when the optical port rate of BBU1302 is a, there are 6 containers (1, 2, 3, 4, 5, 6) in total, and the data resource A, B configured to RRU1303 is placed at the 1, 2 positions of the containers; data resource C, D configured for RRU1304 is placed at the 3, 4 location of the container; data resource E, F configured for RRU1305 is placed at 5 and 6 positions of the container;
the optical interface resource configuration information of the local optical interface resource exchange module 1332 is:
data A, B with numbers 0 and 1 are extracted from an optical port OPT0 on the RRU1303 and sent to the middle rf module 1331.
An optical interface resource allocation module 1335 disposed in the RRU1303 calculates, based on the optical interface rate calculation module 1334, the optical interface rate b of the RRU1303 obtained by calculation, the data amount information carried on each RRU, and the like, the optical interface resource configuration information that needs to be sent to the optical interface resource exchange module 1333 of the lower stage in the RRU1303 and the local optical interface resource exchange module 1342 in the RRU 1304.
The optical interface resource configuration information of the lower optical interface resource exchange module 1333 is:
when the speed of the lower optical port OPT1 of the RRU1303 is b, 4 containers (1, 2, 3, 4) are used to carry the data C, D, E, F numbered 3, 4, 5, 6 in the container with the speed a of the upper optical port OPT0 of the RRU1303 to the positions numbered 1, 2, 3, 4 in the container with the speed b of the lower optical port.
The optical interface resource configuration information of the local optical interface resource exchange module 1342 is:
data C, D, numbered 1 and 2, is extracted from the optical port OPT0 on the RRU1304 and sent to the intermediate radio frequency module 1341.
An optical interface resource allocation module 1345 disposed in the RRU1304 calculates, based on the optical interface rate c of the RRU1304 obtained by calculation of the optical interface rate calculation module 1344, and data amount information and the like carried on each RRU, the optical interface resource configuration information that needs to be sent to the optical interface resource exchange module 1343 of the next stage in the RRU1304 and the local optical interface resource exchange module 1352 in the RRU1305 is calculated.
The optical interface resource configuration information of the lower optical interface resource exchange module 1343 is:
when the speed of the lower optical port OPT1 of the RRU1304 is c, there are 2 containers (1, 2) in total, and the data E, F numbered 3 and 4 in the container with the speed b of the upper optical port OPT0 of the RRU1304 is moved to the positions numbered 1 and 2 in the container with the speed c of the lower optical port.
The optical interface resource configuration information of the local optical interface resource switching module 1352 is:
data E, F with numbers 1 and 2 are extracted from an optical port OPT0 on the RRU1305 and sent to the middle rf module 1351.
The subsequent steps are similar to steps 6 to 9 in the first embodiment, and the local optical interface resource exchange module and the lower optical interface resource exchange module in each RRU move data according to the optical interface resource configuration information, so that reasonable and effective configuration of optical interface resources in the cascaded RRU link can be realized, waste of optical interface resources is avoided, and the cost of base station equipment is effectively reduced.
In the description process of the above embodiment, the BBU and the RRU are cascaded as an example, and in practical application, the technical solution provided by the embodiment of the present invention can also be adapted to the cascade mode of the BBU and the BBU.
An embodiment of the present invention further provides a NodeB (base station), where the NodeB may specifically include the BBU or the RRU provided in the foregoing embodiment of the present invention.
The embodiment of the present invention further provides a communication system, and the communication system may specifically include the base station provided in the embodiment of the present invention.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and substitutions can be made without departing from the technical principle of the present invention, and these modifications and substitutions should also be regarded as the protection scope of the present invention.
Claims (17)
1. A method for configuring optical interface resources of cascaded devices in a base station is characterized by comprising the following steps:
determining the optical interface resource configuration information of each stage of cascade device based on the optical interface rate of each stage of cascade device and the data volume information carried by each stage of cascade device;
and configuring the optical interface resource configuration information to each stage of cascade device so that the corresponding cascade device configures the optical interface resource according to the optical interface resource configuration information.
2. The method of claim 1, wherein the cascaded device comprises a BBU and a plurality of cascaded RRUs, a first stage RRU of the plurality of cascaded RRUs being connected to the BBU.
3. The method of claim 1 or 2, wherein the method further comprises, before determining the optical port resource configuration information of each stage of cascaded devices:
determining the optical port rate of each stage of cascade device based on the obtained topological relation of the cascade device, wherein the topological relation comprises the number of cascaded RRUs, the position relation of each stage of RRU in a cascade link, and the optical port resource required by each stage of RRU, and the optical port rate of the cascade device comprises the optical port rate of BBU and the downstream optical port rate of each stage of RRU.
4. The method of claim 3, wherein determining the optical port rate of each stage of cascaded devices based on the obtained topological relationship of the cascaded devices comprises:
based on the formula:
calculating optical interface resources required by each stage of RRU, wherein M is the number of cells borne by the RRU, A is the number of antennas of each cell, S is the sampling rate of each cell, B is the data bit width of each sampling point, and 10/8 is the optical interface brought by 8B10B codingRedundancy, 16/15 is the redundancy introduced by the control word;
and determining the optical interface rate of each stage of cascade device in the cascade link based on the optical interface rate of the current cascade device being more than or equal to the sum of optical interface resources required by all cascade devices positioned behind the current cascade device in the cascade link.
5. The method of claim 3, wherein an uplink optical interface of the RRU in the cascaded link is the same as a downlink optical interface rate of the RRU of the previous stage or an optical interface rate of the BBU.
6. The method of claim 3, further comprising:
acquiring data resources needing to be transmitted from a baseband module of a BBU;
and according to the optical interface resource configuration information, placing the data resource in a container corresponding to the optical interface resource.
7. The method of claim 3, further comprising:
and each stage of RRU moves the data carried by the RRU in the data received by the upper connection optical port to the radio frequency module of the RRU based on the optical port resource configuration information, and moves the data carried by other RRUs in the data received by the upper connection optical port to the corresponding container in the lower connection optical port of the RRU according to the optical port resource configuration information.
8. An optical interface resource allocation device of a cascade device in a base station is characterized by comprising:
the optical interface resource allocation module is used for determining the optical interface resource configuration information of each stage of cascade device based on the optical interface rate of each stage of cascade device and the data volume information borne by each stage of cascade device;
and the configuration module is used for configuring the optical interface resource configuration information to each stage of cascade device so as to enable the corresponding cascade device to configure the optical interface resource according to the optical interface resource configuration information.
9. The apparatus of claim 8, further comprising:
and the optical port rate calculation module is used for determining the optical port rate of each stage of cascaded device based on the obtained topological relation of the cascaded devices, wherein the topological relation comprises the number of cascaded RRUs, the position relation of each stage of RRU in a cascaded link, and the optical port resources required by each stage of RRU, and the optical port rate of the cascaded devices comprises the optical port rate of BBU and the downlink optical port rate of each stage of RRU.
10. The apparatus of claim 9, wherein the optical port rate calculation module comprises:
an optical interface resource calculation unit for calculating, based on the formula:
calculating optical interface resources required by each stage of RRU, wherein M is the number of cells borne by the RRU, A is the number of antennas of each cell, S is the sampling rate of each cell and the data bit width of each sampling point of B, 10/8 is optical interface redundancy brought by 8B10B coding, and 16/15 is redundancy brought by control words;
and the optical interface rate determining unit is used for determining the optical interface rate of each stage of cascade device in the cascade link based on the fact that the optical interface rate of the current cascade device is greater than or equal to the sum of optical interface resources required by all cascade devices positioned behind the current cascade device in the cascade link.
11. A BBU, characterized in that it comprises the apparatus for configuring optical interface resources of cascaded devices in base stations according to any one of claims 8 to 10.
12. The BBU of claim 11, wherein the BBU further includes:
the device comprises an optical port rate calculation module, a baseband module and an optical port resource exchange module; wherein:
the optical interface rate calculation module is used for determining the optical interface rate of each stage of cascaded device based on the obtained topological relation of the cascaded devices, wherein the topological relation comprises the number of cascaded RRUs, the position relation of each stage of RRU in a cascaded link, and the optical interface resources required by each stage of RRU, and the optical interface rate of the cascaded devices comprises the optical interface rate of BBU and the downstream optical interface rate of each stage of RRU;
and the optical interface resource exchange module is used for acquiring the data resource to be transmitted from the baseband module and placing the data resource in a container corresponding to the optical interface resource according to the optical interface resource configuration information.
13. An RRU, characterized in that it comprises the apparatus for configuring optical interface resources of cascaded devices in a base station according to any of claims 8-10.
14. The RRU of claim 13, further comprising:
the system comprises an optical port rate calculation module, a local optical port resource exchange module, a middle radio frequency module and a lower optical port resource exchange module; wherein:
the optical interface rate calculation module is used for determining the optical interface rate of each stage of cascaded device based on the obtained topological relation of the cascaded devices, wherein the topological relation comprises the number of cascaded RRUs, the position relation of each stage of RRU in a cascaded link, and the optical interface resources required by each stage of RRU, and the optical interface rate of the cascaded devices comprises the optical interface rate of BBU and the downstream optical interface rate of each stage of RRU;
the local optical interface resource exchange module is used for moving the data borne by the RRU in the data received by the upper connection optical interface to the radio frequency module based on the optical interface resource configuration information;
and the lower optical interface resource exchange module is used for moving the data borne by other RRUs in the data received by the upper optical interface to a container corresponding to the lower optical interface resource according to the optical interface resource configuration information.
15. The RRU of claim 13 or 14 wherein the uplink optical interface of the RRU is the same as the downlink optical interface rate of the RRU of the previous stage or the optical interface rate of the BBU.
16. A base station comprising the BBU of claim 11 or the RRU of claim 13.
17. A communication system comprising a base station according to claim 16.
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