CN107005883B

CN107005883B - Baseband resource management method and device

Info

Publication number: CN107005883B
Application number: CN201480083778.1A
Authority: CN
Inventors: 王珏平; 李亮; 蔡华
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2014-12-12
Filing date: 2014-12-12
Publication date: 2019-12-06
Anticipated expiration: 2034-12-12
Also published as: WO2016090637A1; CN107005883A

Abstract

The embodiment of the invention discloses a baseband resource management method and a baseband resource management device, which are used for improving the utilization rate of baseband resources. A resource control center receives a baseband resource request sent by a first baseband unit (BBU), wherein the baseband resource request is used for indicating baseband resources required by baseband data to be migrated of the first BBU; the resource control center receives baseband resource occupancy rates sent by at least one other BBU except the first BBU and available exchange bandwidth between the at least one other BBU and the first BBU; the resource control center selects at least one BBU meeting the baseband resource request from the at least one other BBU as a second BBU; and the resource control center sends a service migration instruction to the first BBU and the second BBU, and instructs the first BBU to migrate the baseband data to be migrated to the second BBU.

Description

Baseband resource management method and device

Technical Field

The embodiment of the invention relates to the technical field of mobile communication, in particular to a baseband resource management method and device.

Background

A Centralized-Radio Access Network (C-RAN) is a new Radio Access Network architecture, which mainly consists of a distributed Remote Radio Unit (Remote Radio Unit), an antenna, a Cloud Baseband Unit (Cloud-Baseband Unit, Cloud-BBU) and a transmission Network connecting them. The Cloud-BBU means that a plurality of BBUs are concentrated together, and the exchange of data among the BBUs is carried out through the exchanger, so that the concentrated use of baseband resources can be realized, namely, a resource pool is realized, and the utilization rate of the baseband resources is improved. Meanwhile, through the C-RAN architecture, data can be processed in a coordinated mode among base stations, such as uplink coordinated multi-point transmission, joint scheduling, carrier aggregation and the like, so that better cell edge user experience is obtained and network capacity is improved.

At present, in a resource pool scheme, when a certain baseband board cell has a busy service and another baseband board cell has a vacant service, part of the cell services in the busy baseband board are transferred to the baseband board with the vacant service, so as to realize baseband resource sharing. When the scheme is adopted, the utilization rate of baseband resources is still low.

disclosure of Invention

in view of this, embodiments of the present invention provide a method and an apparatus for managing baseband resources, so as to improve the utilization rate of the baseband resources.

in a first aspect, a resource control center is provided, where the resource control center includes: a receiving unit, a selecting unit and a transmitting unit; the receiving unit is configured to receive a baseband resource request sent by a first BBU, and is further configured to receive a baseband resource occupancy rate sent by another BBU connected to the resource control center and an available exchange bandwidth between the another BBU and the first BBU, where the baseband resource request is used to indicate a baseband resource required by the first BBU to-be-migrated baseband data; the selection unit is used for selecting at least one BBU meeting the baseband resource request from the other BBUs as a second BBU; the sending unit is configured to send a service migration instruction to the first BBU and the second BBU, and instruct the first BBU to migrate the baseband data to be migrated to the second BBU.

in a second aspect, there is provided a first baseband unit, BBU, comprising: a transmitting unit, a receiving unit and a transferring unit; the sending unit is configured to send a baseband resource request to a resource control center, where the baseband resource request is used to indicate a baseband resource required by the first BBU to be migrated for baseband data; the receiving unit is configured to receive a service migration instruction after the resource control center selects a second BBU that can receive the baseband data to be migrated, where the service migration instruction is used to instruct the first BBU to migrate the baseband data to be migrated to the second BBU; the migration unit is configured to migrate the baseband data to be migrated to the second BBU.

In a third aspect, a second baseband unit, BBU, is provided, the second BBU comprising: a transmitting unit, a receiving unit and a transferring unit; the sending unit is configured to send a baseband resource occupancy rate and an available exchange bandwidth between the second BBU and the first BBU to a resource control center after the resource control center receives a baseband resource request sent by a first BBU, where the baseband resource request is used to indicate a baseband resource required by the first BBU to-be-migrated baseband data; the receiving unit is configured to receive a service migration instruction sent by the resource control center, where the service migration instruction is used to instruct the first BBU to migrate the baseband data to be migrated to the second BBU; the migration unit is configured to migrate the baseband data to be migrated to the second BBU.

In a fourth aspect, a baseband resource management method is provided, where the method includes: a resource control center receives a baseband resource request sent by a first baseband unit (BBU), wherein the baseband resource request is used for indicating baseband resources required by baseband data to be migrated of the first BBU; the resource control center receives baseband resource occupancy rates sent by at least one other BBU except the first BBU and available exchange bandwidth between the at least one other BBU and the first BBU; the resource control center selects at least one BBU meeting the baseband resource request from the at least one other BBU as a second BBU; and the resource control center sends a service migration instruction to the first BBU and the second BBU, and instructs the first BBU to migrate the baseband data to be migrated to the second BBU.

In a fifth aspect, a first resource control center is provided, the first resource control center comprising: a receiving unit and a transmitting unit; the receiving unit is configured to receive a first baseband resource request sent by a first baseband unit BBU connected to the first resource control center, where the first baseband resource request is used to indicate a baseband resource required by baseband data to be migrated of the first BBU; the sending unit is configured to send a second baseband resource request to a second resource control center, so that the second resource control center selects a second BBU that meets the second baseband resource request from BBUs connected to the second resource control center, where the second baseband resource request is used to indicate a baseband resource required by the first BBU to be migrated for baseband data; the receiving unit is further configured to receive, from the second resource control center, an identifier of the second BBU; the sending unit is further configured to send a first service migration instruction to the first BBU, where the first service migration instruction is used to instruct the first BBU to migrate the baseband data to be migrated to the second BBU.

in a sixth aspect, a second resource control center is provided, which includes: a receiving unit, a selecting unit and a transmitting unit; the receiving unit is configured to receive a second baseband resource request sent by the first resource control center after the first resource management center receives a first baseband resource request sent by a first baseband unit BBU connected to the first resource management center, where the first baseband resource request is used to indicate a baseband resource required by baseband data to be migrated of the first BBU, the second baseband resource request is used to indicate a baseband resource required by the baseband data to be migrated of the first BBU, and the receiving unit is further configured to receive a baseband resource occupancy rate sent by a BBU connected to the second resource control center and an available exchange bandwidth between the BBU connected to the second resource control center and the first BBU; the selecting unit is configured to select at least one BBU that meets the second baseband resource request from the BBUs connected to the second resource control center as a second BBU; the sending unit is configured to send the identifier of the second BBU to the first resource control center, so that the first resource control center sends a first service migration instruction to the first BBU, and instructs the first BBU to migrate the baseband data to be migrated to the second BBU, and the sending unit is further configured to send a second service migration instruction to the second BBU, and instructs the second BBU to receive the baseband data to be migrated.

In a seventh aspect, a baseband resource management method is provided, where the method includes: a first resource management center receives a first baseband resource request sent by a first baseband unit (BBU) connected with the first resource management center, wherein the first baseband resource request is used for indicating baseband resources required by baseband data to be migrated of the first BBU; the first resource control center sends a second baseband resource request to a second resource control center, where the second baseband resource request is used to indicate baseband resources required by baseband data to be migrated of the first BBU, so that the second resource control center receives the baseband resource occupancy rate sent by a BBU connected to the second resource control center and available exchange bandwidth between the BBU connected to the second resource control center and the first BBU, selects at least one BBU meeting the second baseband resource request from the BBUs connected to the second resource control center as a second BBU, sends an identifier of the second BBU to the first resource control center, sends a second service migration instruction to the second BBU, and indicates the second BBU to receive the baseband data to be migrated; and the first resource control center sends a first service migration instruction to the first BBU, and instructs the first BBU to migrate the baseband data to be migrated to the second BBU.

In an eighth aspect, a baseband resource management method is provided, where the method includes: the second resource control center receives a second baseband resource request sent by the first resource control center after the first resource management center receives a first baseband resource request sent by a first baseband unit (BBU) connected with the first resource management center, wherein the first baseband resource request is used for indicating baseband resources required by baseband data to be migrated of the first BBU, and the second baseband resource request is used for indicating baseband resources required by the baseband data to be migrated of the first BBU; the second resource control center receives the baseband resource occupancy rate sent by the BBU connected with the second resource control center and the available exchange bandwidth between the BBU connected with the second resource control center and the first BBU; the second resource control center selects at least one BBU meeting the second baseband resource request from the BBUs connected with the second resource control center as a second BBU; the second resource control center sends the identifier of the second BBU to the first resource control center, so that the first resource control center sends a first service migration instruction to the first BBU, and instructs the first BBU to migrate the baseband data to be migrated to the second BBU; and the second resource control center sends a second service migration instruction to the second BBU, and instructs the second BBU to receive the baseband data to be migrated.

through the scheme, the resource control center can control the migration of the baseband data processing among different BBUs according to the baseband resource occupancy rates and the available exchange bandwidth resources of the L1, L2 and L3 levels, the resource sharing granularity is fine, and the utilization rate of the baseband resources is improved.

drawings

Fig. 1 is a diagram of a baseband resource management network architecture according to an embodiment of the present invention;

fig. 2 is a structural diagram of a resource control center according to an embodiment of the present invention;

Fig. 3 is a block diagram of a baseband unit according to an embodiment of the present invention;

Fig. 4 is a block diagram of another baseband unit according to an embodiment of the present invention;

Fig. 5 is a flowchart of a baseband resource management method according to an embodiment of the present invention;

Fig. 6 is a diagram of another architecture of a baseband resource management network according to an embodiment of the present invention;

fig. 7 is a structural diagram of a resource control center according to an embodiment of the present invention;

fig. 8 is a structural diagram of another resource control center according to an embodiment of the present invention;

fig. 9 is a flowchart of another baseband resource management method according to an embodiment of the present invention.

Detailed Description

Fig. 1 is a diagram of a baseband resource management network architecture according to an embodiment of the present invention, as shown in fig. 1, the network at least includes: the system comprises a resource control center 101, at least two BBUs 102, at least one RRU103 connected with the BBUs, and a switch 104.

The resource control center is respectively connected with each BBU. Different BBUs may be connected through a switch, for example, the BBU and the switch may be connected through an Inter Digital Unit Interface (IDI), and a Common Protocol Radio Interface (CRRI) is one of the IDIs. By means of the switch, different BBUs can realize mutual transmission of baseband data, such as layer 1(L1), layer 2(L2) and layer 3 (L3). The BBU and the RRU can be connected through the CPRI. Through the switch, CPRI signals can be mutually transmitted among different BBUs. The BBU interconnection of the embodiment of the present invention is not limited to the single switch structure shown in fig. 1, and may be a more complex structure such as a multi-layer switch, as long as the interconnection and intercommunication between BBUs can be achieved. One BBU at least comprises one baseband board, wherein the interconnection among the BBUs refers to the interconnection among the baseband boards in the BBUs, and the baseband board refers to a single board for completing a baseband processing function.

According to the network architecture shown in fig. 1, an embodiment of the present invention provides a resource control center. As shown in fig. 2, the resource control center includes: a receiving unit 2001, a selecting unit 2002, and a transmitting unit 2003.

A receiving unit 2001, configured to receive a baseband resource request sent by the first BBU, and further configured to receive a baseband resource occupancy rate sent by another BBU connected to the receiving unit and an available exchange bandwidth between the another BBU and the first BBU, where the baseband resource request is used to indicate a baseband resource required by the first BBU to-be-migrated baseband data;

A selecting unit 2002 for selecting at least one BBU satisfying the baseband resource request from the other BBUs as a second BBU;

a sending unit 2003, configured to send a service migration instruction to the first BBU and the second BBU, and instruct the first BBU to migrate the baseband data to be migrated to the second BBU.

Optionally, the baseband data to be migrated of the first BBU is L1 data, or L2 data, or L3 data. The occupancy rate of the baseband resource sent by other BBUs is L1 resource occupancy rate, or L2 resource occupancy rate, or L3 resource occupancy rate; the remaining exchange bandwidth between the other BBUs and the first BBU is either L1 available exchange bandwidth, or L2 available exchange bandwidth, or L3 available exchange bandwidth.

The resource control center provided by the embodiment of the invention controls the migration of baseband data processing among different BBUs according to the baseband resource occupancy rates and available exchange bandwidth resources of L1, L2 and L3 levels, has fine resource sharing granularity and improves the utilization rate of baseband resources.

Further optionally, the L1 data may be L1 cell-level data or L1 user-level data, and the baseband resource occupancy rate sent by other BBUs is L1 cell-level resource occupancy rate or L1 user-level resource occupancy rate; the L2 data can be L2 data transmission data, or L2 control data, or L2 scheduling data, and the baseband resource occupancy rate sent by other BBUs is L2 resource occupancy rate. That is, the type of data to be migrated may correspond to the type of baseband resource occupancy sent by the BBU.

Optionally, the selecting unit 2002 selects at least one BBU that meets the baseband resource request from the other BBUs as the second BBU specifically, the selecting unit 2002 selects a BBU whose link delay is smaller than a preset threshold from the BBUs that meet the baseband resource request, and then selects the BBU with the lowest resource occupancy as the second BBU. The link delay refers to the transmission delay between other BBUs and the first BBU. When the selection unit 2002 selects a BBU, other algorithms may also be adopted, and factors such as resource occupancy, available exchange bandwidth, time delay and the like are comprehensively considered, so as to give an overall optimal scheduling result.

according to the resource control center provided by the embodiment of the invention, the baseband data processing is migrated among different BBUs according to the occupancy rate of a certain type of data processing resource in the L1 or L2 and the available exchange bandwidth resource of the BBU, so that the resource pool sharing with finer granularity is realized, and the utilization rate of the baseband resource is further improved.

alternatively, the resource control center in the above embodiments may be implemented by another hardware structure having a transceiver and a processor, for example, the transceiver may implement the functions of the transmitting unit and the receiving unit, the processor may implement the function of the selecting unit, and the hardware structure generally further includes a memory.

According to the network architecture shown in fig. 1, an embodiment of the present invention provides a first baseband unit BBU. As shown in fig. 3, the first baseband unit includes a transmitting unit 3001, a receiving unit 3002, and a migration unit 3003.

A sending unit 3001, configured to send a baseband resource request to a resource control center, where the baseband resource request is used to indicate a baseband resource required by the first BBU to be migrated with baseband data;

A receiving unit 3002, configured to receive a service migration instruction after the resource control center selects a second BBU that can receive the baseband data to be migrated, where the service migration instruction is used to instruct the first BBU to migrate the baseband data to be migrated to the second BBU;

A migration unit 3003, configured to migrate the baseband data to be migrated to the second BBU.

Optionally, the baseband data to be migrated of the first BBU is L1 data, or L2 data, or L3 data.

The BBU provided by the embodiment of the invention can realize the migration of baseband data processing of different levels, has fine resource sharing granularity and improves the utilization rate of baseband resources.

further optionally, the L1 data may be L1 cell-level data or L1 user-level data; the L2 data may be L2 data, or L2 control data, or L2 scheduling data.

according to the BBU provided by the embodiment of the invention, the baseband data processing is migrated among different BBUs according to a certain type of data in the L1 or the L2, so that the resource pool sharing with finer granularity is realized, and the utilization rate of baseband resources is further improved.

Alternatively, the BBU in the above embodiments may be implemented by other hardware structures having a transceiver and a processor, for example, the transceiver may implement functions of the transmitting unit and the receiving unit, the processor may implement functions of the migration unit, and the hardware structure generally further includes a memory.

According to the network architecture shown in fig. 1, an embodiment of the present invention provides a second baseband unit BBU. As shown in fig. 4, the second baseband unit includes a transmitting unit 4001, a receiving unit 4002, and a migration unit 4003.

A sending unit 4001, configured to send, after a resource control center receives a baseband resource request sent by a first BBU, a baseband resource occupancy rate and an available exchange bandwidth between a second BBU and the first BBU to the resource control center, where the baseband resource request is used to indicate a baseband resource required by the first BBU to-be-migrated baseband data;

A receiving unit 4002, configured to receive a service migration instruction sent by the resource control center, where the service migration instruction is used to instruct the first BBU to migrate baseband data to be migrated to the second BBU;

A migration unit 4003, configured to migrate the baseband data to be migrated to the second BBU.

optionally, the baseband data to be migrated may be layer 1 data, or layer 2 data, or layer 3 data; the occupancy rate of the baseband resource sent by the sending unit is the occupancy rate of the layer 1 resource, or the occupancy rate of the layer 2 resource, or the occupancy rate of the layer 3 resource; the available switching bandwidth between the second BBU and said first BBU is either layer 1 available switching bandwidth, or layer 2 available switching bandwidth, or layer 3 available switching bandwidth.

Further optionally, the layer 1 data may be layer 1 cell level data or layer 1 user level data, and the baseband resource occupancy rate sent by the sending unit is the layer 1 cell level resource occupancy rate or the layer 1 user level resource occupancy rate; the layer 2 data may be layer 2 data transmission data, or layer 2 control data, or layer 2 scheduling data, and the baseband resource occupancy rate transmitted by the transmitting unit is the layer 2 resource occupancy rate.

According to the embodiments of the apparatuses corresponding to fig. 2 to fig. 4, the embodiments of the present invention further describe the method corresponding to the foregoing embodiments of the apparatuses in detail.

As shown in fig. 5, an embodiment of the present invention provides a baseband resource management method, which mainly includes the following steps:

5001. The first BBU sends a baseband resource request to a resource control center, wherein the baseband resource request is used for indicating baseband resources required by baseband data to be migrated of the first BBU.

5002. And the resource control center receives the baseband resource occupancy rate sent by other BBUs and the available exchange bandwidth between the other BBUs and the first BBU.

5003. And the resource control center selects at least one BBU meeting the baseband resource request from the other BBUs as a second BBU.

5004. and the resource control center sends a service migration instruction to the first BBU and the second BBU, and instructs the first BBU to migrate the baseband data to be migrated to the second BBU.

5005. and the first BBU transfers the baseband data to be transferred to the second BBU.

Optionally, in step 5001, the baseband data to be migrated of the first BBU is L1 data, or L2 data, or L3 data. Correspondingly, in step 5002, the baseband resource occupancy rate sent by other BBUs is L1 resource occupancy rate, or L2 resource occupancy rate, or L3 resource occupancy rate; the remaining exchange bandwidth between the other BBUs and the first BBU is either L1 available exchange bandwidth, or L2 available exchange bandwidth, or L3 available exchange bandwidth.

The baseband resource management method provided by the embodiment of the invention carries out the migration of the baseband data processing among different BBUs according to the baseband resource occupancy rates and the available exchange bandwidth resources of the L1, L2 and L3 levels, has fine resource sharing granularity and improves the utilization rate of the baseband resources.

Further optionally, the above-mentioned L1 data may be L1 cell-level data or L1 user-level data, and correspondingly, in step 5002, the baseband resource occupancy rate sent by other BBUs is L1 cell-level resource occupancy rate, or L1 user-level resource occupancy rate; the L2 data may be L2 data, or L2 control data, or L2 scheduling data, and accordingly, in step 5002, the baseband resource occupancy rate sent by other BBUs is L2 resource occupancy rate. That is, the type of data to be migrated may correspond to the type of baseband resource occupancy sent by the BBU.

Optionally, in step 5003, the resource control center selects at least one BBU that satisfies the baseband resource request from the other BBUs as the second BBU, specifically, the resource control center selects a BBU whose link delay is smaller than a preset threshold from the BBUs that satisfy the baseband resource request, and then selects the BBU with the lowest resource occupancy as the second BBU. The link delay refers to the transmission delay between other BBUs and the first BBU. When the resource control center selects the BBU, other algorithms can be adopted, factors such as resource occupancy rate, available exchange bandwidth and time delay are comprehensively considered, and the overall optimal scheduling result is given.

According to the baseband resource management method provided by the embodiment of the invention, the baseband data processing is migrated among different BBUs according to the occupancy rate of a certain type of data processing resource in the L1 or L2 and the available exchange bandwidth resource of the BBU, so that the resource pool sharing with finer granularity is realized, and the utilization rate of the baseband resource is further improved.

Fig. 6 is a diagram of a baseband resource management network according to another embodiment of the present invention, as shown in fig. 6, the network includes two sets of networks shown in fig. 1. The first set of networks comprises: a resource control center 101, at least two BBUs 102, at least one RRU103 connected with the BBUs, and a switch 104; the second set of networks includes: a resource control center 201, at least two BBUs 202, at least one RRU203 connected with the BBUs 202, and a switch 204.

for the first set of networks, resource control center 101 is connected to each BBU 103. The different BBUs 102 may be connected by a switch 104, e.g. BBUs and switches may be connected by IDI, CRRI being one of the IDI. With the switch 104, the different BBUs 102 can implement mutual transmission of baseband data, such as L1, L2, L3 data. The BBU and the RRU can be connected through the CPRI. Through the switch, CPRI signals can be mutually transmitted among different BBUs.

For the second set of networks, the structure and function are similar to those of the first set of networks, and are not described herein again. The BBUs of the two sets of networks can be interconnected and intercommunicated through the switch 301. The interconnection between the BBUs 102 and 202 in the embodiment of the present invention is not limited to the switch structure shown in fig. X, and may be a more complex structure such as a multi-layer switch, as long as the interconnection between BBUs can be realized. The resource control center 101 is connected to a resource control center 201.

Optionally, the first set of networks and the second set of networks may be located in different clusters (e.g., two adjacent clusters) to achieve a wider range of baseband resource sharing.

According to the network architecture shown in fig. 6, a first resource control center is provided in an embodiment of the present invention. As shown in fig. 7, the first resource control center includes a receiving unit 7001 and a transmitting unit 7002.

The receiving unit 7001 is configured to receive a first baseband resource request sent by a first baseband unit BBU connected to a first resource control center, where the first baseband resource request is used to indicate a baseband resource required by baseband data to be migrated of the first BBU;

A sending unit 7002, configured to send a second baseband resource request to the second resource control center, so that the second resource control center selects a second BBU that meets the second baseband resource request from BBUs connected to the second resource control center, where the second baseband resource request is used to indicate a baseband resource needed by the first BBU to be migrated to the baseband data;

a receiving unit 7001, further configured to receive an identification of the second BBU from the second resource control center;

The sending unit 7002 is further configured to send a first service migration instruction to the first BBU, where the first service migration instruction is used to instruct the first BBU to migrate the baseband data to be migrated to the second BBU.

The baseband resource management method provided by the embodiment of the invention carries out the migration of the baseband data processing among different BBUs according to the baseband resource occupancy rates and the available exchange bandwidth resources of the L1, L2 and L3 levels, has fine resource sharing granularity, realizes the sharing of the baseband resources of different clusters, and improves the utilization rate of the baseband resources.

further optionally, the L1 data may be L1 cell level data or L1 user level data, respectively.

The baseband resource management method provided by the embodiment of the invention migrates the baseband data processing among the BBUs in different clusters according to the occupancy rate of certain type of data processing resources in the L1 or L2 and the available exchange bandwidth resources of the BBUs, realizes the sharing of resource pools with finer granularity, and further improves the utilization rate of the baseband resources

Alternatively, the resource control center in the above embodiments may be implemented by other hardware structures having a transceiver and a processor, for example, the transceiver may implement the functions of the transmitting unit and the receiving unit, and the hardware structure generally further includes a memory.

According to the network architecture shown in fig. 6, a second resource control center is provided in the embodiment of the present invention. As shown in fig. 8, the second resource control center includes: receiving section 8001, selecting section 8002, and transmitting section 8003.

The receiving unit 8001 is configured to receive, after a first resource management center receives a first baseband resource request sent by a first baseband unit BBU connected to the first resource management center, a second baseband resource request sent by the first resource control center, where the first baseband resource request is used to indicate a baseband resource required by the first BBU to be migrated to baseband data, the second baseband resource request is used to indicate a baseband resource required by the first BBU to be migrated to baseband data, and the receiving unit 8001 is further configured to receive a baseband resource occupancy rate sent by a BBU connected to the second resource control center and an available exchange bandwidth between the BBU connected to the second resource control center and the first BBU;

a selecting unit 8002, configured to select at least one BBU that meets the second baseband resource request from the BBUs connected to the second resource control center as a second BBU;

The sending unit 8003 is configured to send the identifier of the second BBU to the first resource control center, so that the first resource control center sends a first service migration instruction to the first BBU, and instructs the first BBU to migrate the baseband data to be migrated to the second BBU, and the sending unit 8003 is further configured to send a second service migration instruction to the second BBU, and instructs the second BBU to receive the baseband data to be migrated.

Optionally, the baseband data to be migrated of the first BBU is L1 data, or L2 data, or L3 data. Correspondingly, the baseband resource occupancy rate sent by the BBU connected to the second resource control center is L1 resource occupancy rate, or L2 resource occupancy rate, or L3 resource occupancy rate; the available switching bandwidth between the BBU connected to the second resource control center and the first BBU is L1 available switching bandwidth, or L2 available switching bandwidth, or L3 available switching bandwidth.

The resource control center provided by the embodiment of the invention performs the migration of the baseband data processing among different BBUs according to the baseband resource occupancy rates and the available exchange bandwidth resources of the L1, L2 and L3 levels, has fine resource sharing granularity, realizes the sharing of the baseband resources of different clusters, and improves the utilization rate of the baseband resources.

further optionally, the L1 data may be L1 cell-level data or L1 user-level data, and correspondingly, the baseband resource occupancy rate sent by the BBU connected to the second resource control center is L1 cell-level resource occupancy rate or L1 user-level resource occupancy rate; the L2 data can be L2 data transmission data, or L2 control data, or L2 scheduling data, and correspondingly, the baseband resource occupancy rate sent by the BBU connected with the second resource control center is L2 resource occupancy rate. That is, the type of data to be migrated may correspond to the type of baseband resource occupancy.

optionally, the selecting unit 8002 selects at least one BBU that meets the second baseband resource request from the BBUs connected to the second resource control center as the second BBU, where the selecting unit 8002 selects a BBU whose link delay is smaller than a preset threshold from the BBUs that meet the second baseband resource request and are connected to the second resource control center, and then selects a BBU with the lowest resource occupancy as the second BBU. When the selection unit 8002 selects the second BBU, it may also use other algorithms, comprehensively consider factors such as resource occupancy, available exchange bandwidth, and time delay, and give an overall optimal scheduling result.

According to the resource control center provided by the embodiment of the invention, the baseband data processing is migrated among the BBUs in different clusters according to the occupancy rate of a certain type of data processing resource in the L1 or L2 and the available exchange bandwidth resource of the BBU, so that the resource pool sharing with finer granularity is realized, and the utilization rate of the baseband resource is further improved.

According to the network architecture shown in fig. 6 and the embodiments of the apparatuses corresponding to fig. 7 and 8, the embodiments of the present invention further describe the method corresponding to the foregoing embodiments of the apparatuses in detail.

as shown in fig. 9, an embodiment of the present invention provides a baseband resource management method, which includes the following main steps:

9001. the first BBU102 sends a first baseband resource request to the resource control center 101 connected thereto, where the first baseband resource request is used to indicate a baseband resource required by the first BBU102 to migrate baseband data.

9002. The resource control center 101 sends a second baseband resource request to the resource control center 201, where the second baseband resource request is used to indicate a baseband resource required by the first BBU102 to migrate baseband data;

9003. the resource control center 201 receives the baseband resource occupancy sent by the BBU202 connected thereto and the available exchange bandwidth between the BBU202 and the first BBU 102.

9004. The resource control center 201 selects at least one BBU202 satisfying the second baseband resource request from the BBUs 202 as a second BBU.

9005. The resource control center 201 sends the identifier of the second BBU to the resource control center 101;

9006. The resource control center 101 sends a first service migration instruction to the first BBU102, and instructs the first BBU102 to migrate the baseband data to be migrated to the second BBU.

9007. The resource control center 201 sends a second service migration instruction to the second BBU, and instructs the second BBU to receive the baseband data to be migrated.

9008. the first BBU102 migrates the baseband data to be migrated to the second BBU.

In this embodiment, steps 9005 and 9007 are not in sequence, and steps 9006 and 9007 are not in sequence.

Optionally, in step 9001, the baseband data to be migrated of the first BBU is L1 data, or L2 data, or L3 data. Correspondingly, in step 9003, the baseband resource occupancy rate sent by the BBU202 connected to the resource control center 201 is L1 resource occupancy rate, or L2 resource occupancy rate, or L3 resource occupancy rate; the available switching bandwidth between the BBU202 and the first BBU102 is either the L1 available switching bandwidth, or the L2 available switching bandwidth, or the L3 available switching bandwidth.

it should be noted that, optionally in this embodiment, the resource control center 101 may request a resource from the resource control center 201 in another cluster when there is no BBU that can provide enough baseband resources in the cluster to which it belongs. The resource control center 201 may not have enough resources, and at this time, it needs to request a third resource control center, and the resource control center 201 plays a role of forwarding the request, and at this time, it may also be considered that the resource control center 101 requests the third resource control center for resources. The above scenarios are all included in the scope of the present invention.

Further optionally, the above-mentioned L1 data may be L1 cell-level data or L1 user-level data, and correspondingly, in step 9003, the baseband resource occupancy rate sent by the BBU202 connected to the resource control center 201 is L1 cell-level resource occupancy rate, or L1 user-level resource occupancy rate; the above-mentioned L2 data may be L2 data for data transmission, or L2 control data, or L2 scheduling data, and correspondingly, in step 9003, the baseband resource occupancy rate sent by the BBU202 connected to the resource control center 201 is L2 resource occupancy rate. That is, the type of data to be migrated may correspond to the type of baseband resource occupancy sent by the BBU.

Optionally, in step 9004, the resource control center 201 selects at least one BBU202 that satisfies the baseband resource request from the BBU202 as the second BBU, specifically, the resource control center 202 selects a BBU whose link delay is smaller than a preset threshold from the BBUs 202 that satisfy the second baseband resource request, and then selects a BBU with the lowest resource occupancy as the second BBU. Link latency refers to the transmission latency between the BBU202 and the first BBU102 described above. When the BBU202 is selected by the resource control center 201, other algorithms may be adopted, and factors such as resource occupancy, available exchange bandwidth, time delay and the like are comprehensively considered, so as to give an overall optimal scheduling result.

According to the baseband resource management method provided by the embodiment of the invention, the baseband data processing is migrated among the BBUs in different clusters according to the occupancy rate of a certain type of data processing resource in the L1 or L2 and the available exchange bandwidth resource of the BBU, so that the resource pool sharing with finer granularity is realized, and the utilization rate of the baseband resource is further improved.

It should be noted that, for all embodiments of the present invention, in the BBU, different software or hardware resources are generally allocated for different data processing, for example, different resources are allocated for L1 data processing or L2 data processing, different resources are allocated for L2 data transmission data processing, L2 control data processing, and L2 scheduling data processing, and the baseband resource occupancy rate that the BBU sends to the resource control center in the embodiment of the present invention refers to the occupancy rate of corresponding software and hardware resources or idle resource software and hardware resources. For example, the L1 resource occupancy may be 50%, the L2 scheduled resource occupancy is 40%, the entire L2 idle processing resources are X CPU cores, and so on. In addition, the resource control center can be supported by the entity structures such as the switch, the BBU and the like, as long as the functions of the resource control center can be realized.

In all embodiments of the present invention, terms such as L1 cell level, L1 user level, L2 data transmission, L2 control, and L2 scheduling may be defined according to Long Term Evolution (LTE) standard. The L1 user level refers to user level processing of an LTE physical layer, and comprises functions of modulation and demodulation, coding/decoding and the like; the L1 cell level refers to the cell level processing of an LTE physical layer, and comprises the functions of insertion and removal of cyclic prefixes, fast Fourier transform and inverse fast Fourier transform, resource mapping and inverse mapping and the like; l2 Data transmission, that is, L2 Data transmission, includes L2 Protocol processing procedures such as Packet Data Convergence Protocol (PDCP), Radio Link Control (RLC), multiplexing and demultiplexing of Media Access Control (MAC) Data, and the like; l2 control, including two parts of L2 cell management and user management, L2 cell management completes the establishment, modification and deletion of L2 cell, completes the distribution of public channel resource and other functions, L2 user management completes the establishment, modification and deletion of L2 user, maintenance of user information (measurement information, feedback information), maintenance of user state (activation, synchronization and other functions); the L2 scheduling refers to LTE L2 uplink scheduling, Downlink scheduling, Physical Downlink Control Channel (PDCCH) resource contention allocation, and the like. The L1 cell-level data is time-domain in-phase quadrature IQ data, which is data in a cell unit; the L1 user-level data is data in units of users, and data of each user can be distinguished, and is usually frequency domain data.

It should be noted that although some terms of LTE are used in the embodiments of the present invention, the scope of protection is not limited to LTE, and the subsequent LTE evolution or other standard communication systems are also covered by the scope of protection of the present invention as long as they have similar functions.

from the above description of the embodiments, it is clear to those skilled in the art that the present invention can be implemented by hardware, firmware, or a combination thereof. When implemented in software, the functions described above may be stored on or transmitted over as one or more instructions or code on a computer-readable medium. Computer-readable media includes both computer storage media and communication media including any medium that facilitates transfer of a computer program from one place to another. A storage media may be any available media that can be accessed by a computer. Taking this as an example but not limiting: computer-readable media can include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and that can be accessed by a computer. Furthermore, the method is simple. Any connection is properly termed a computer-readable medium. For example, if software is transmitted from a website, a server, or other remote source using a coaxial cable, a fiber optic cable, a twisted pair, a Digital Subscriber Line (DSL), or a wireless technology such as infrared, radio, and microwave, the coaxial cable, the fiber optic cable, the twisted pair, the DSL, or the wireless technology such as infrared, radio, and microwave are included in the fixation of the medium. Disk and disc, as used herein, includes Compact Disc (CD), laser disc, optical disc, Digital Versatile Disc (DVD), floppy Disk and blu-ray disc where disks usually reproduce data magnetically, while discs reproduce data optically with lasers. Combinations of the above should also be included within the scope of computer-readable media.

in short, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A resource control center, comprising: a receiving unit, a selecting unit and a transmitting unit,

the receiving unit is configured to receive a baseband resource request sent by a first BBU, and is further configured to receive a baseband resource occupancy rate sent by another BBU connected to the resource control center and an available exchange bandwidth between the another BBU and the first BBU, where the baseband resource request is used to indicate a baseband resource required by the first BBU to-be-migrated baseband data;

The selection unit is used for selecting at least one BBU meeting the baseband resource request from the other BBUs as a second BBU;

The sending unit is configured to send a service migration instruction to the first BBU and the second BBU, and instruct the first BBU to migrate the baseband data to be migrated to the second BBU, where the type of the baseband data to be migrated corresponds to the type of the baseband resource occupancy rate sent by the BBU.

2. The resource control center of claim 1, said first BBU to-be-migrated baseband data being layer 1 data, or layer 2 data, or layer 3 data; the baseband resource occupancy rate sent by other BBUs is the layer 1 resource occupancy rate, or the layer 2 resource occupancy rate, or the layer 3 resource occupancy rate; the available switching bandwidth between said at least other BBU and said first BBU is layer 1 available switching bandwidth, or layer 2 available switching bandwidth, or layer 3 available switching bandwidth.

3. The resource control center of claim 2, the layer 1 data being layer 1 cell level data or layer 1 user level data; the occupancy rate of the baseband resources sent by other BBUs is the occupancy rate of layer 1 cell-level resources or the occupancy rate of layer 1 user-level resources.

4. the resource control center of claim 2, the layer 2 data being layer 2 data transfer data, or layer 2 control data, or layer 2 scheduling data; and the baseband resource occupancy rate sent by other BBUs is the layer 2 resource occupancy rate.

5. the resource control center according to any one of claims 1 to 4, wherein when said selecting unit selects at least one BBU that satisfies said baseband resource request from said other BBUs as a second BBU, said selecting unit selects a BBU whose link delay is smaller than a preset threshold from among the BBUs that satisfy said baseband resource request, and selects a BBU whose resource occupancy is lowest from among the BBUs whose link delay is smaller than the preset threshold as said second BBU.

6. A first baseband unit, BBU, comprising: a sending unit, a receiving unit, a migration unit,

The sending unit is configured to send a baseband resource request to a resource control center, where the baseband resource request is used to indicate a baseband resource required by the first BBU to be migrated for baseband data;

the receiving unit is configured to receive a service migration instruction after the resource control center selects a second BBU that can receive the baseband data to be migrated, where the service migration instruction is used to instruct the first BBU to migrate the baseband data to be migrated to the second BBU;

The migration unit is configured to migrate the baseband data to be migrated to the second BBU, where a type of the data to be migrated may correspond to a type of the baseband resource occupancy rate sent by the BBU.

7. The first BBU of claim 6, wherein the baseband data to be migrated is layer 1 data, or layer 2 data, or layer 3 data.

8. The first BBU of claim 7, the layer 1 data being layer 1 cell-level data or layer 1 user-level data.

9. the first BBU of claim 7, said layer 2 data being layer 2 data transfer data, or layer 2 control data, or layer 2 scheduling data.

10. A second baseband unit, BBU, comprising: a sending unit, a receiving unit, a migration unit,

The sending unit is configured to send a baseband resource occupancy rate and an available exchange bandwidth between the second BBU and the first BBU to a resource control center after the resource control center receives a baseband resource request sent by a first BBU, where the baseband resource request is used to indicate a baseband resource required by the first BBU to-be-migrated baseband data;

The receiving unit is configured to receive a service migration instruction sent by the resource control center, where the service migration instruction is used to instruct the first BBU to migrate the baseband data to be migrated to the second BBU;

The migration unit is configured to migrate the baseband data to be migrated to the second BBU, where a type of the baseband data to be migrated corresponds to a type of the baseband resource occupancy rate sent by the BBU.

11. The second BBU of claim 10, the baseband data to be migrated being layer 1 data, or layer 2 data, or layer 3 data; the occupancy rate of the baseband resource sent by the sending unit is the occupancy rate of the layer 1 resource, or the occupancy rate of the layer 2 resource, or the occupancy rate of the layer 3 resource; the available switching bandwidth between said second BBU and said first BBU is layer 1 available switching bandwidth, or layer 2 available switching bandwidth, or layer 3 available switching bandwidth.

12. The second BBU of claim 11, the layer 1 data being layer 1 cell-level data or layer 1 user-level data; the occupancy rate of the baseband resource sent by the sending unit is the occupancy rate of the layer 1 cell level resource, or the occupancy rate of the layer 1 user level resource.

13. the second BBU of claim 11, said layer 2 data being layer 2 data transfer data, or layer 2 control data, or layer 2 scheduling data; the baseband resource occupancy rate transmitted by the transmitting unit is the layer 2 resource occupancy rate.

14. a method for baseband resource management, the method comprising:

A resource control center receives a baseband resource request sent by a first baseband unit (BBU), wherein the baseband resource request is used for indicating baseband resources required by baseband data to be migrated of the first BBU;

The resource control center receives baseband resource occupancy rates sent by at least one other BBU except the first BBU and available exchange bandwidth between the at least one other BBU and the first BBU;

The resource control center selects at least one BBU meeting the baseband resource request from the at least one other BBU as a second BBU;

And the resource control center sends a service migration instruction to the first BBU and the second BBU, and instructs the first BBU to migrate the baseband data to be migrated to the second BBU, wherein the type of the baseband data to be migrated corresponds to the type of the baseband resource occupancy rate sent by the BBU.

15. The method of claim 14, the first BBU baseband data to be migrated being layer 1 data, or layer 2 data, or layer 3 data; the baseband resource occupancy rate sent by the at least one other BBU is the layer 1 resource occupancy rate, or the layer 2 resource occupancy rate, or the layer 3 resource occupancy rate; the available switching bandwidth between said at least one other BBU and said first BBU is layer 1 available switching bandwidth, or layer 2 available switching bandwidth, or layer 3 available switching bandwidth.

16. the method of claim 15, the layer 1 data is layer 1 cell level data or layer 1 user level data; the baseband resource occupancy rate sent by the at least one other BBU is the layer 1 cell level resource occupancy rate, or the layer 1 user level resource occupancy rate.

17. the method of claim 15, the layer 2 data is layer 2 data transmission data, or layer 2 control data, or layer 2 scheduling data; the baseband resource occupancy transmitted by the at least one other BBU is a layer 2 resource occupancy.

18. The method according to any of claims 14-17, wherein when said resource control center selects at least one BBU that satisfies said baseband resource request from said at least one other BBU as a second BBU, said resource control center selects a BBU having a link delay less than a preset threshold from the BBUs that satisfy said baseband resource request, and selects a BBU having a lowest resource occupancy as said second BBU from the BBUs having a link delay less than a preset threshold.

19. A first resource control center, the first resource control center comprising: a receiving unit and a sending unit, wherein,

The receiving unit is configured to receive a first baseband resource request sent by a first baseband unit BBU connected to the first resource control center, where the first baseband resource request is used to indicate a baseband resource required by baseband data to be migrated of the first BBU;

The sending unit is configured to send a second baseband resource request to a second resource control center, so that the second resource control center selects a second BBU that meets the second baseband resource request from BBUs connected to the second resource control center, where the second baseband resource request is used to indicate a baseband resource required by the first BBU to be migrated for baseband data;

The receiving unit is further configured to receive, from the second resource control center, an identifier of the second BBU;

The sending unit is further configured to send a first service migration instruction to the first BBU, where the first service migration instruction is used to instruct the first BBU to migrate the baseband data to be migrated to the second BBU, and a type of the baseband data to be migrated corresponds to a type of the baseband resource occupancy rate sent by the BBU.

20. the first resource control center of claim 19, the baseband data to be migrated being layer 1 data, or layer 2 data, or layer 3 data.

21. the first resource control center of claim 20, the layer 1 data being layer 1 cell level data or layer 1 user level data.

22. The first resource control center of claim 20, the layer 2 data is layer 2 data transfer data, or layer 2 control data, or layer 2 scheduling data.

23. A second resource control center, comprising: a receiving unit, a selecting unit, a transmitting unit,

The receiving unit is configured to receive a second baseband resource request sent by a first resource control center after the first resource control center receives a first baseband resource request sent by a first baseband unit BBU connected to the first resource control center, where the first baseband resource request is used to indicate a baseband resource required by baseband data to be migrated of the first BBU, the second baseband resource request is used to indicate a baseband resource required by the baseband data to be migrated of the first BBU, and the receiving unit is further configured to receive a baseband resource occupancy rate sent by a BBU connected to the second resource control center and an available exchange bandwidth between the BBU connected to the second resource control center and the first BBU;

the selecting unit is configured to select at least one BBU that meets the second baseband resource request from the BBUs connected to the second resource control center as a second BBU;

the sending unit is configured to send the identifier of the second BBU to the first resource control center, so that the first resource control center sends a first service migration instruction to the first BBU, and instructs the first BBU to migrate the baseband data to be migrated to the second BBU, and the sending unit is further configured to send a second service migration instruction to the second BBU, and instructs the second BBU to receive the baseband data to be migrated, where a type of the baseband data to be migrated corresponds to a type of baseband resource occupancy rate sent by the BBU.

24. The second resource control center of claim 23, said first BBU baseband data to be migrated being layer 1 data, or layer 2 data, or layer 3 data; the baseband resource occupancy rate sent by the BBU connected with the second resource control center is the layer 1 resource occupancy rate, or the layer 2 resource occupancy rate, or the layer 3 resource occupancy rate; the available switching bandwidth between the BBU connected with the second resource control center and the first BBU is layer 1 available switching bandwidth, or layer 2 available switching bandwidth, or layer 3 available switching bandwidth.

25. The second resource control center of claim 24, the layer 1 data being layer 1 cell level data or layer 1 user level data; and the baseband resource occupancy rate sent by the BBU connected with the second resource control center is the layer 1 cell level resource occupancy rate or the layer 1 user level resource occupancy rate.

26. the second resource control center of claim 24, the layer 2 data is layer 2 data transfer data, or layer 2 control data, or layer 2 scheduling data; and the baseband resource occupancy rate sent by the BBU connected with the second resource control center is the layer 2 resource occupancy rate.

27. The second resource control center of any one of claims 23 to 26, wherein when the selecting unit selects at least one BBU that satisfies the second baseband resource request from the BBUs connected to the second resource control center as the second BBU, the selecting unit selects a BBU having a link delay smaller than a preset threshold from the BBUs that satisfy the second baseband resource request and are connected to the second resource control center, and selects a BBU having a lowest resource occupancy as the second BBU from the BBUs having a link delay smaller than the preset threshold.

28. A method for baseband resource management, the method comprising:

A first resource control center receives a first baseband resource request sent by a first baseband unit (BBU) connected with the first resource control center, wherein the first baseband resource request is used for indicating baseband resources required by baseband data to be migrated of the first BBU;

The first resource control center sends a second baseband resource request to a second resource control center, where the second baseband resource request is used to indicate baseband resources required by baseband data to be migrated of the first BBU, so that the second resource control center receives the baseband resource occupancy rate sent by a BBU connected to the second resource control center and available exchange bandwidth between the BBU connected to the second resource control center and the first BBU, selects at least one BBU meeting the second baseband resource request from the BBUs connected to the second resource control center as a second BBU, sends an identifier of the second BBU to the first resource control center, sends a second service migration instruction to the second BBU, and indicates the second BBU to receive the baseband data to be migrated;

And the first resource control center sends a first service migration instruction to the first BBU, and instructs the first BBU to migrate the baseband data to be migrated to the second BBU, wherein the type of the baseband data to be migrated corresponds to the type of the baseband resource occupancy rate sent by the BBU.

29. The method of claim 28, the first BBU baseband data to be migrated is layer 1 data, or layer 2 data, or layer 3 data; the baseband resource occupancy rate sent by the BBU connected with the second resource control center is the layer 1 resource occupancy rate, or the layer 2 resource occupancy rate, or the layer 3 resource occupancy rate; the available switching bandwidth between the BBU connected with the second resource control center and the first BBU is layer 1 available switching bandwidth, or layer 2 available switching bandwidth, or layer 3 available switching bandwidth.

30. The method of claim 29, the layer 1 data is layer 1 cell level data or layer 1 user level data; and the baseband resource occupancy rate sent by the BBU connected with the second resource control center is the layer 1 cell level resource occupancy rate or the layer 1 user level resource occupancy rate.

31. The method of claim 29, the layer 2 data is layer 2 data transmission data, or layer 2 control data, or layer 2 scheduling data; and the baseband resource occupancy rate sent by the BBU connected with the second resource control center is the layer 2 resource occupancy rate.

32. The method according to any of claims 28-31, wherein when said second resource control center selects at least one BBU that satisfies said second baseband resource request from said BBUs connected to said second resource control center as a second BBU, said second resource control center selects a BBU having a link delay less than a preset threshold from the BBUs that satisfy said second baseband resource request and that are connected to said second resource control center, and selects a BBU having a lowest resource occupancy as the second BBU from the BBUs having a link delay less than a preset threshold.

33. A method for baseband resource management, the method comprising:

the second resource control center receives a second baseband resource request sent by the first resource control center after the first resource control center receives a first baseband resource request sent by a first baseband unit (BBU) connected with the first resource control center, wherein the first baseband resource request is used for indicating baseband resources required by baseband data to be migrated of the first BBU, and the second baseband resource request is used for indicating baseband resources required by the baseband data to be migrated of the first BBU;

The second resource control center receives the baseband resource occupancy rate sent by the BBU connected with the second resource control center and the available exchange bandwidth between the BBU connected with the second resource control center and the first BBU;

The second resource control center selects at least one BBU meeting the second baseband resource request from the BBUs connected with the second resource control center as a second BBU;

The second resource control center sends the identifier of the second BBU to the first resource control center, so that the first resource control center sends a first service migration instruction to the first BBU, and instructs the first BBU to migrate the baseband data to be migrated to the second BBU;

and the second resource control center sends a second service migration instruction to the second BBU, and instructs the second BBU to receive the baseband data to be migrated, wherein the type of the baseband data to be migrated corresponds to the type of the baseband resource occupancy rate sent by the BBU.

34. The method of claim 33, the first BBU baseband data to be migrated is layer 1 data, or layer 2 data, or layer 3 data; the baseband resource occupancy rate sent by the BBU connected with the second resource control center is the layer 1 resource occupancy rate, or the layer 2 resource occupancy rate, or the layer 3 resource occupancy rate; the available switching bandwidth between the BBU connected with the second resource control center and the first BBU is layer 1 available switching bandwidth, or layer 2 available switching bandwidth, or layer 3 available switching bandwidth.

35. The method of claim 34, the layer 1 data is layer 1 cell level data or layer 1 user level data; and the baseband resource occupancy rate sent by the BBU connected with the second resource control center is the layer 1 cell level resource occupancy rate or the layer 1 user level resource occupancy rate.

36. The method of claim 34, the layer 2 data is layer 2 data transmission data, or layer 2 control data, or layer 2 scheduling data; and the baseband resource occupancy rate sent by the BBU connected with the second resource control center is the layer 2 resource occupancy rate.

37. The method according to any of claims 34-36, wherein when said second resource control center selects at least one BBU that satisfies said second baseband resource request from said BBUs connected to said second resource control center as a second BBU, said second resource control center selects a BBU having a link delay smaller than a preset threshold from the BBUs that satisfy said second baseband resource request and that are connected to said second resource control center, and selects a BBU having a lowest resource occupancy as the second BBU from the BBUs having a link delay smaller than the preset threshold.