WO2018094746A1

WO2018094746A1 - Method for base station to send data, bbu and rhub

Info

Publication number: WO2018094746A1
Application number: PCT/CN2016/107527
Authority: WO
Inventors: 彭劲东
Original assignee: 华为技术有限公司
Priority date: 2016-11-28
Filing date: 2016-11-28
Publication date: 2018-05-31
Also published as: CN109314865A

Abstract

A method for a base station to send data, a BBU, and an RHUB, for use in implementing space division multiplexing in a same cell to improve the performance of an entire network. The method comprises: a BBU obtains communicational connection relations between M terminals and L RRUs in a cell; the BBU generates M sets of downlink resources allocated for the M terminals, and generates allocation information of M sets of downlink data to be sent to the M terminals, wherein a terminal corresponds to a set of downlink resources and a set of downlink data, M≥1, and M is a positive integer; the BBU sends the communicational connection relations and the allocation information of the M sets of downlink data and of the M sets of downlink resources to the RHUB, so that the RHUB sends to any one of the RRUs downlink data and downlink resources corresponding to the terminal communicationally connected to the any one of the RRUs.

Description

Method for transmitting data by base station, BBU and RHUB

Technical field

The present application relates to the field of communications technologies, and in particular, to a method, a BBU, and a RHUB for transmitting data by a base station.

Background technique

With the development of communication technology, indoors has become a high-risk area for mobile services. In the current indoor signal coverage technology, a base station structure uses a Base Band Unit (BBU)-Remote Radio Unit Hub (RHUB)-a small power RRU (picro-RRU, pRRU) Layer structure. One BBU can connect to one or more RHUBs, and one RHUB can connect multiple pRRUs. The working principle is: the BBU sends the signal to the RHUB, the RHUB and the pRRU are connected by a network cable, and the RHUB distributes the signal to each pRRU, and each pRRU processes the signal into a radio frequency signal, and then passes the RF feeder, the combiner/splitter Transmission equipment such as antennas connect radio frequency signals into the room. The indoor terminal sends a feedback signal to the pRRU, and each pRRU sends a feedback signal to the RHUB. The RHUB aggregates the feedback signals and transmits them to the BBU. The RHUB is also used to power the pRRU.

Among them, the pRRU is a low-power RF module, which has smaller volume and weight and the same function as the RRU in the DAS system. Each pRRU can be flexibly configured with scrambling codes. One Pico RRU can be configured with one scrambling code (that is, one cell is formed), or multiple pRRUs can be configured into the same cell. Thus, the capacity can be flexibly configured and adjusted, and combined with wide coverage capability. Can adapt to a variety of different applications. When multiple pRRUs are configured in the same cell, in the downlink direction, the BBU sends the initial downlink data to the RHUB, and the RHUB copies the initial downlink data into multiple copies and distributes them to each pRRU, where the downlink data received by each pRRU is received. The content is the same; in the uplink direction, each pRRU receives the uplink data sent by the terminal and sends it to the RHUB. The RHUB performs radio frequency combining on each uplink data and sends it to the BBU for demodulation. Therefore, the same cell in which multiple pRRUs are configured may also become a radio frequency combining cell.

In the application scenario of the radio frequency combined cell, since the downlink data content sent by the RHUB to each pRRU is the same, the resource utilization rate of the same frequency band is low, and the downlink capacity of the cell is also low.

Summary of the invention

The present invention provides a method and a device for transmitting data by a base station, which are used to implement space division multiplexing of a base station, thereby improving downlink capacity of a radio frequency combined cell.

In one aspect, a method for a base station to transmit data, where the base station includes a BBU, a RHUB, and L RRUs located in a same cell, where the BBU is connected to the RHUB, and the L RRUs are RHUB is connected, L ≥ 2, and L is a positive integer. The BBU distributes the downlink resources and downlink data of the terminals in its coverage to each RRU. This saves a part of downlink resources and uses space isolation to implement space division multiplexing, reduce invalid transmission, and avoid wasting resources. Also, since the data to be transmitted to each RRU 103 is reduced in resources, interference to the neighboring area is further reduced.

In a possible design, the BBU acquires a communication connection relationship between the M terminals in the cell and the L RRUs, and generates M groups of downlink resources for the M terminals, and generates the The allocation information of the M group downlink data to be sent by the M terminals, wherein one terminal corresponds to a group of downlink resources and a group of downlink data, M≥1, M is a positive integer, and the BBU sends the communication connection to the RHUB. The relationship, the M group downlink data, and the M group downlink resource allocation information are used by the RHUB to send, to any one of the RRUs, downlink data and downlink resources corresponding to the terminal having the communication connection with the any one of the RRUs. In this way, unnecessary invalid transmission can be reduced, resource waste can be avoided, and the capacity in the same cell can be improved by the saved downlink resources, and further, the interference to the neighboring area is reduced due to the reduction of occupied resources.

In a possible design, the BBU allocates M sets of downlink resources to the M terminals according to the following allocation rule: if the first terminal and the second terminal of the M terminals have communication connections with the same RRU, And allocating different downlink resources to the first terminal and the second terminal; if the RRU having a communication connection relationship with the first terminal is different from the RRU having a communication connection with the third terminal, A terminal and the third terminal allocate downlink resources with the largest degree of coincidence, The third terminal is any one of the M terminals except the first terminal and the second terminal. In this way, the resource allocation locations notified to the terminals under different RRU coverages can be maximized, the resource occupation is reduced, and the interference to the neighboring cells is further reduced. For the RRU in the same cell, more resources can be saved for allocation to more terminals, and space division multiplexing in the same cell is realized.

In a possible design, after the BBU acquires the communication connection relationship, before generating the allocation information, the BBU calculates, according to the communication connection relationship, a terminal that has a communication connection with at least two RRUs. The ratio of the number to the M; and, determining that the ratio is less than the set ratio threshold. In this way, it is possible to ensure that the terminal in the cell can satisfy the condition of space division multiplexing.

In a possible design, the BBU acquires a communication connection relationship between the M terminals and the L RRUs, and the BBU listens to periodic signals reported by the RHUB, wherein the RHUB follows a round. The polling sequence sequentially forwards the periodic signals received on the respective RRUs to the BBU, and the periodic signals carry the identification information of the terminal, and the BBU detects that the periodic signals received on one RRU exceed the setting. When the strength threshold is used, it is determined that the terminal corresponding to the identifier information of the terminal currently carried by the periodically detected periodic signal has a communication connection with the currently listening RRU.

A second aspect provides a method for a base station to transmit data, where the base station includes a baseband processing unit BBU, a radio remote unit hub RHUB, and L radio remote units RRU located in the same cell, where the BBU and the RHUB connection, the L RRUs are all connected to the RHUB, L≥2, L is a positive integer; the method includes: the RHUB receiving M terminals in the cell sent by the BBU and the The communication connection relationship between the L RRUs, the M group downlink data, and the M group downlink resource allocation information, wherein one terminal corresponds to a group of downlink data and a group of downlink resources, M≥1, and M is a positive integer; the RHUB And combining downlink resources and downlink data to be sent to each RRU according to the communication connection relationship, the M group downlink data, and the allocation information, and sending the data to each RRU respectively, where the RHUB sends to any RRU Downlink data and downlink resources corresponding to terminals having a communication connection with any one of the RRUs. In this way, a part of downlink resources can be saved, spatial isolation can be utilized, space division multiplexing can be realized, invalid transmission can be reduced, resources are wasted, and resources are reduced due to data transmission to each RRU 103. This further reduces interference with neighboring areas.

In a third aspect, there is provided a baseband processing unit BBU having a function of implementing the BBU behavior of any of the possible aspects of the first aspect and the first aspect described above. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a fourth aspect, a radio remote unit hub RHUB is provided, the radio remote unit hub having a function of implementing the RHUB behavior of any of the possible aspects of the second aspect and the second aspect described above. The functions may be implemented by hardware or by corresponding software implemented by hardware. The hardware or software includes one or more modules corresponding to the functions described above.

In a fifth aspect, a baseband processing unit BBU is provided, the baseband processing unit including a transceiver, a memory, and a processor, wherein the memory is configured to store a set of programs, and the processor is configured to invoke the program stored by the memory to The method as described in any of the possible aspects of the first aspect and the first aspect described above is performed.

In a sixth aspect, a radio remote unit hub RHUB is provided, the radio remote unit hub includes a transceiver, a memory, and a processor, wherein the memory is configured to store a set of programs, and the processor is configured to invoke the memory The stored program is to perform the method as described in any of the possible aspects of the second aspect and the second aspect described above.

A seventh aspect, the invention provides a base station, comprising the baseband processing unit according to the third aspect or the fifth aspect, the radio remote unit hub according to the fourth aspect or the sixth aspect, and L devices located in the same cell The RRU, wherein the BBU is connected to the RHUB, and the L RRUs are all connected to the RHUB, L≥2, and L is a positive integer.

DRAWINGS

1 is a schematic structural diagram of a base station in an embodiment of the present application;

2 is a schematic flowchart of a method for sending data by a base station according to an embodiment of the present application;

3 is a second schematic structural diagram of a base station in an embodiment of the present application;

4 is a schematic diagram of scheduling a terminal according to a common scheduling manner in an embodiment of the present application;

FIG. 5 is a schematic diagram of a relationship between downlink resources and downlink data in an embodiment of the present application;

6 is a second schematic flowchart of a method for sending data by a base station according to an embodiment of the present application;

7 is a schematic structural diagram of a baseband processing unit in an embodiment of the present application;

FIG. 8 is a schematic structural diagram of a radio remote unit hub according to an embodiment of the present application; FIG.

9 is a second schematic structural diagram of a baseband processing unit in an embodiment of the present application;

FIG. 10 is a second schematic structural diagram of a radio remote unit hub according to an embodiment of the present application.

detailed description

The present invention will be further described in detail with reference to the accompanying drawings, in which FIG.

The solution provided in this embodiment of the present application may be applied to various scenarios in the field of the wireless technology, including but not limited to the mobile communication system, the fixed wireless access system, the wireless data transmission system, the radar system, etc. Specially limited.

The method provided by the embodiment of the present application is specifically described below with reference to the accompanying drawings. Referring to FIG. 1 , the base station 100 according to the embodiment of the present application includes a BBU 101, a RHUB 102, and L RRUs 103, L≥2, and L is a positive integer. The L RRUs 103 can be written as RRU1-103, RRU2-103, ..., RRUL-103. The base station 100 can be regarded as a three-layer structure of the BBU-RHUB-RRU. One BBU 101 can be connected to one or more RHUBs 102. One BBU 101 is connected to one RHUB 102 in FIG. 1 as an example for description. One RHUB 102 can be connected to a plurality of RRUs 103, which are denoted as L RRUs 103 in FIG. The RRU103 can be a low-power radio frequency module pRRU. The pRRU is much smaller in size and weight than the conventional RRU, and has the same function. The RHUB102 and the RRU103 are connected by a network cable, and mainly perform signal distribution and aggregation, and provide power for the RRU103. The BBU 101 transmits the downlink data to the RHUB 102, and the RHUB 102 forwards it to each RRU 103. The L RRUs 103 are located in the same cell, and the different RRUs 103 cover different ranges. For example, the RRU1-103 covers the first floor of the building where the base station 100 is located, and the RRU3-103 covers the third floor of the building where the base station 100 is located, the signal of the RRU1-103 and the RRU3. The -103 signal has a large spatial isolation.

It should be noted that the solution provided by the embodiment of the present application is not limited to the application to the base station, and those skilled in the art may apply the solution provided by the embodiment of the present application to any system having a three-layer structure of the BBU-RHUB-RRU or In the system to make changes.

In the scenario of the radio frequency combining cell, the embodiment of the present application no longer distributes the same content data to each RRU 103, but only distributes the data of the terminal within its coverage range to each RRU 103, thereby saving a part. Downlink resources, using spatial isolation, implement space division multiplexing, reduce invalid transmission, avoid wasting resources, and further reduce interference to neighboring cells due to reduced resources occupied by data transmitted to each RRU 103.

Based on the base station architecture shown in FIG. 1 , as shown in FIG. 2 , the method for sending data by the base station provided by the embodiment of the present application is as follows:

Step 201: The BBU 101 acquires a communication connection relationship between the M terminals in the cell and the L RRUs 103.

The terminal can be understood as a communication connection between the terminal and the RRU under the coverage of the RRU, and multiple communication connections exist between the M terminals and the L RRUs to form a communication connection relationship.

Optionally, after obtaining the communication connection relationship, the BBU 101 identifies the isolation of the terminal according to the communication connection relationship. In practical applications, when the terminal isolation exceeds the threshold, the terminal can be considered to satisfy the air separation condition. The higher the threshold is set, the smaller the interference between the terminals is, and the better the air separation effect is. For example, when the isolation is 15-20 dB, it is considered that the interference between the terminals is acceptable, that is, the space division condition is satisfied. The BBU 101 records the terminal identifier (ie, ID) and the ID of the RRU corresponding to the terminal for the terminal that satisfies the space division condition.

In a possible implementation manner, after acquiring the communication connection relationship, the BBU 101 calculates the proportion of the terminals occupying the total number of terminals under the coverage of the two or more RRUs 103, that is, the BBU 101 calculates the number of terminals that have communication connections with at least two RRUs 103. The ratio of M is determined whether the calculated ratio is less than the set ratio threshold. If the ratio is less than the set ratio threshold, step 202 is performed; if the ratio is not less than the set ratio threshold, the terminal is scheduled according to the existing scheduling manner.

Step 202: The BBU 101 allocates M group downlink resources for the M terminals, and generates M group downlink data to be sent to the M terminals, and generates allocation information of the M group downlink resources and the M group downlink data, where one terminal corresponds to a group. Downstream resources and a set of downlink data, M≥1, M is a positive integer.

Optionally, the BBU 101 allocates M groups of downlink resources to the M terminals according to the following allocation rule.

It is assumed that the first terminal, the second terminal, and the third terminal are all terminals different from each other among the M terminals. If both the first terminal and the second terminal have a communication connection with the same RRU 103, the downlink data sent to the first terminal and the downlink data sent to the second terminal may be mutually interfered, in this case, the first The terminal and the second terminal allocate different downlink resources.

If the RRU 103 having a communication connection relationship with the first terminal is different from the RRU 103 having a communication connection with the third terminal, that is, the first terminal and the third terminal are covered by different RRUs, in this case, the first terminal and The third terminal allocates the downlink resource with the largest degree of coincidence. Specifically, if the downlink resources of the same size are allocated to the first terminal and the third terminal, the first terminal and the third terminal are allocated downlink resources with the same resource block location; if necessary, the first terminal and the third terminal are required. The size of the allocated downlink resources is different, and the resource block locations allocated for the first terminal and the third terminal are the most overlapped.

Step 203: The BBU 101 sends the communication connection relationship, the M group downlink data, and the M group downlink resource allocation information to the RHUB 102, and the RHUB 102 sends the downlink data and the downlink resource corresponding to the terminal that has any communication connection with any one of the RRUs 103. The RHUB 102 receives the communication connection relationship, the M group downlink data, and the M group downlink resource allocation information sent by the BBU 101, where one terminal corresponds to a group of downlink data and a group of downlink resources.

Step 204: The RHUB 102 combines the downlink resources and the downlink data to be sent to each RRU 103 according to the communication connection relationship, the M group downlink data, and the M group downlink resource allocation information, and sends the downlink resources and the downlink data to the respective RRUs 103 respectively. The RHUB 102 transmits downlink data and downlink resources corresponding to the terminal having a communication connection with any one of the RRUs 103 to any one of the RRUs 103.

Optionally, in step 201, the BBU 101 obtains a communication connection relationship between the M terminals and the L RRUs 103, which may be, but is not limited to, implemented in the following manner:

The BBU 101 listens to the periodic signal reported by the RHUB 102, and the RHUB 102 forwards the periodic signals received on the RRUs 103 to the BBU 101 in sequence according to the polling order, and the periodic signal carries the identification information of the terminal;

The BBU 101 detects that the periodic signal received on one RRU 103 exceeds the set strength. At the threshold, it is determined that the terminal corresponding to the identifier information of the terminal currently carried by the periodically detected periodic signal has a communication connection with the currently listening RRU 103.

The method for transmitting data by the base station shown in FIG. 2 transmits only the resource allocation information of the terminal under the coverage and the related downlink data to each RRU, so that the resource allocation location notified to the terminals under different RRU coverage can be maximized. Coincidence reduces resource occupancy and further reduces interference to neighboring areas. For the RRU in the same cell, more resources can be saved for allocation to more terminals, and space division multiplexing in the same cell is realized.

The method provided by the embodiment of the present application is further described in detail below in conjunction with a specific application scenario.

Based on the system architecture shown in FIG. 1, as shown in FIG. 3, it is assumed that L=3, the RRU is a pRRU, and the pRRUs located in the same cell are respectively pRRU1, pRRU2, and pRRU3, and the to-be-scheduled terminals are represented by UE1, UE2, and UE3. In this application scenario, the method for transmitting data is specifically as described in the following 1) to 4).

1) Obtain a communication connection relationship between each terminal and each pRRU.

The terminal, under the coverage of the pRRU, indicates that there is a communication connection between the terminal and the pRRU. The communication connection between each terminal and the pRRU constitutes a communication connection relationship. Specifically, after the terminal accesses the network, the base station configures a sounding reference symbol (SRS) resource for the terminal, and the terminal periodically sends an SRS signal to the pRRU on the allocated SRS resource, and each pRRU receives the The SRS signals are sent to the RHUB.

In the embodiment of the present application, the RHUB does not report the SRS signal sent by each pRRU to the BBU through the radio frequency combination, but in an SRS cycle, the RHUB only reports the SRS signal received by the pRRU to the BBU. The polling method can report the SRS signal received by each pRRU in a polling period.

The BBU determines the communication connection relationship between each terminal and each pRRU according to the SRS signal strength received by each pRRU. For example, in the polling sequence reported by the pRRU1, the BBU receives the SRS signal of the UE1, and the SRS signal strength exceeds the set strength threshold, indicating that the UE1 is within the coverage of the pRRU1, and it can be said that the pRRU1 is the working pRRU of the UE1. If UE1 is only on pRRU1 There is a signal at the time of reporting that UE1 is only within the coverage of pRRU1. For example, in the polling sequence reported by the PRRU1 and the pRRU2, the BBU receives the SRS signal of the UE2, and the SRS signal strength exceeds the set strength threshold, indicating that the UE2 is not only within the coverage of the pRRU1 but also within the coverage of the pRRU2. It can also be said that pRRU1 and pRRU2 are working pRRUs of UE2.

For example, the relationship between the UE acquired by the BBU and its working pRRU is as shown in Table 1.

Table 1

终端terminal	工作pRRUWorking pRRU
UE1UE1	pRRU1pRRU1
UE2UE2	pRRU1、pRRU2pRRU1, pRRU2
UE3UE3	pRRU3pRRU3

2) The BBU schedules each terminal in the frequency domain, allocates downlink resources for each terminal, and generates downlink data to be sent to each terminal.

For convenience of explanation, it is assumed that there are currently 8 resource blocks that can be allocated, and the sequence numbers of the respective resource blocks are represented by 1, 2, ..., and 8. The manner of specifically allocating downlink resources and downlink data may be as follows.

The BBU first performs scheduling in the frequency domain according to the common scheduling mode, and allocates downlink resources to each terminal. For example, as shown in FIG. 4, it is assumed that resource blocks 3, 4 are allocated for UE1, resource block 5 is allocated for UE2, and

resource blocks

6, 7, and 8 are allocated for UE3. A set of downlink data to be sent for UE1 is generated as a and b. A set of downlink data to be transmitted for UE2 is generated as c. A set of downlink data to be sent for UE3 is generated as d, e, and f.

3) After the scheduling is completed, the BBU determines the downlink resource location and downlink data to be sent to each pRRU according to the communication connection relationship between each terminal and the pRRU according to Table 1.

Specifically, the downlink data transmitted to each pRRU is first determined. As shown in FIG. 5, UE1 and UE2 both have a communication connection with pRRU1, and therefore only need to send downlink data corresponding to UE1 and UE2 to pRRU1, that is, transmit downlink data a, b, and c. UE2 only has a communication connection with pRRU2, so only downlink data corresponding to UE2 needs to be sent to pRRU2, that is, downlink data c is transmitted. UE3 only has a communication connection with pRRU3, so only downlink data corresponding to UE3 needs to be sent to pRRU3, that is, the number of downlinks is sent. According to d, e, f.

Further, a downlink resource location transmitted to each pRRU is determined. Since the BBU sends the downlink data c corresponding to the UE2 to both the pRRU1 and the pRRU2, the downlink resource position occupied by the downlink data c needs to be the same. For example, the original resource block 5 allocated to the UE2 according to the common scheduling mode of the BBU may be used. An optional implementation manner, the downlink resource sent to the pRRU1 is the initially allocated

downlink resource

3, 4, and 5 occupied by the UE1 and the UE2; the downlink resource sent to the pRRU2 is the initially allocated downlink resource 5 occupied by the UE2; to the pRRU3 The transmitted downlink resource location is moved to the location with the highest coincidence of the downlink resource locations of the remaining two pRRUs, that is, 3, 4, and 5.

In summary, the final determined downlink resource and downlink data allocation relationship is as shown in FIG. 5, pRRU1 corresponds to downlink

resources

3, 4, and 5, downlink data a, b, and c; pRRU2 corresponds to downlink resource 5, downlink data c; pRRU3 corresponds

Downstream resources

3, 4, 5, downlink data d, e, f.

In this way, the downlink data of 3, 4, 5, 6, 7, 8 and all the downlink data of the corresponding three terminals are not transmitted to each pRRU in the conventional manner, but only sent to each pRRU. The part of the downlink data corresponding to the terminal that is covered by the terminal, and the location of the downlink resource is used to ensure that the terminal under each pRRU coverage has the highest downlink resource overlap degree, which can reduce unnecessary invalid transmission, avoid resource waste, and save by The downlink resources can increase the capacity in the same cell, and further reduce the interference to the neighboring cells due to the reduction of occupied resources.

Of course, instead of allocating the re-adjustment location according to the above-mentioned common scheduling manner, the final downlink resources may be directly allocated to each terminal. For example, resource blocks 3, 4 are allocated for UE1, resource blocks 5 are allocated for UE2, and

resource blocks

3, 4, and 5 are allocated for UE3.

4) As shown in FIG. 6, the BBU sends the downlink resources and downlink data allocated to each terminal to the RHUB, and the RHUB reorganizes the data according to the allocation mode of the BBU. They are sent to each pRRU. Each terminal receives downlink data on a corresponding downlink resource.

In summary, the method for transmitting data provided by the embodiment of the present invention can implement spatial multiplexing without increasing the baseband resources, and improve the downlink throughput rate of the cell; and according to the location of the terminal, the corresponding data is delivered and reduced. Interference to neighboring areas improves overall network performance.

Based on the same inventive concept, as shown in FIG. 7, the embodiment of the present application provides a baseband processing list. Yuan 700, including:

The obtaining unit 701 is configured to acquire a communication connection relationship between the M terminals and the L RRUs in the cell.

The allocating unit 702 is configured to generate M group downlink resources for the M terminals, and generate allocation information of the M group downlink data to be sent to the M terminals, where one terminal corresponds to a group of downlink resources and a group of downlink data, where ≥1, M is a positive integer;

The sending unit 703 is configured to send, to the RHUB, the communication connection relationship, the M group downlink data, and the M group downlink resource allocation information, and the RHUB sends the downlink data and the downlink corresponding to the terminal that has a communication connection with any one of the RRUs. Resources.

Optionally, the allocating unit 702 is configured to:

If the first terminal and the second terminal of the M terminals have a communication connection with the same RRU, the first terminal and the second terminal are allocated different downlink resources;

If the RRU having the communication connection relationship with the first terminal is different from the RRU having the communication connection with the third terminal, the first terminal and the third terminal are allocated the downlink resource with the largest degree of coincidence, and the third terminal is the M terminal. Any terminal other than the first terminal and the second terminal.

Optionally, the determining unit 704 is further configured to, after acquiring the communication connection relationship, calculating a ratio of the number of terminals having communication connections with the at least two RRUs to the M according to the communication connection relationship before generating the allocation information; , the determined ratio is less than the set ratio threshold.

Optionally, the obtaining unit 701 is configured to:

Listening to the periodic signal reported by the RHUB, wherein the RHUB forwards the periodic signal received on each RRU to the acquiring unit in sequence according to the polling order, and the periodic signal carries the identification information of the terminal;

Whenever the periodic signal received on an RRU exceeds the set strength threshold, it is determined that the terminal corresponding to the identifier information of the terminal currently carried by the periodically detected periodic signal has a communication connection with the currently listening RRU. .

Based on the same inventive concept, as shown in FIG. 8, the embodiment of the present application further provides a radio remote unit hub 800, including:

The receiving unit 801 is configured to receive, by the BBU, the communication connection relationship between the M terminals and the L RRUs, the M group downlink data, and the M group downlink resource allocation information, where one terminal corresponds to a group of downlink data and A group of downlink resources, M≥1, M is a positive integer;

The data combining unit 802 is configured to combine downlink resources and downlink data to be sent to each RRU according to the communication connection relationship, the M group downlink data, and the allocation information received by the receiving unit 801;

The sending unit 803 is configured to send, to the respective RRUs, the downlink resources and the downlink data to be sent to the respective RRUs by combining the data combining units;

The transmitting unit 803 transmits downlink data and downlink resources corresponding to the terminal having a communication connection with any one of the RRUs to any one of the RRUs.

Based on the same inventive concept, as shown in FIG. 9, the embodiment of the present application provides a baseband processing unit 900, including a transceiver 901, a processor 902, and a memory 903. Optionally, the method further includes a bus 904, a transceiver 901, and processing. The 902 and the memory 903 are both connected to the bus 904. The memory 903 stores a set of programs. The processor 902 is configured to invoke a program stored in the memory 903 to perform the following operations:

Generating M group downlink resources for M terminals, and generating allocation information of M groups of downlink data to be sent to M terminals, wherein one terminal corresponds to a group of downlink resources and a group of downlink data, M≥1, M is positive Integer

The RHUB sends the communication connection relationship, the M group downlink data, and the M group downlink resource allocation information, and the RHUB sends the downlink data and the downlink resource corresponding to the terminal having the communication connection with any one of the RRUs.

Optionally, the processor 902 is configured to:

Optionally, the processor 902 is further configured to generate allocation information after acquiring the communication connection relationship. Previously, according to the communication connection relationship, the ratio of the number of terminals having communication connection with at least two RRUs to M is calculated; and the determined ratio is less than the set ratio threshold.

Optionally, the processor 902 is further configured to:

Whenever the periodic signal received on an RRU exceeds the set strength threshold, it is determined that the terminal corresponding to the identifier information of the terminal currently carried by the periodically detected periodic signal has a communication connection with the currently listening RRU.

The processor 902 can be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP.

Processor 902 can also further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL), or any combination thereof.

The memory 903 may include a volatile memory such as a random-access memory (RAM); the memory 903 may also include a non-volatile memory such as a flash memory (flash) Memory), hard disk drive (HDD) or solid state drive (SSD); the memory 903 may also include a combination of the above types of memories.

It should be noted that the connection manner in FIG. 9 is only an example, and may also be other possible connection manners.

Based on the same inventive concept, as shown in FIG. 10, the embodiment of the present application provides a radio remote unit hub 1000, including a transceiver 1001, a processor 1002, a memory 1003, and optionally, a bus 1004, a transceiver 1001. The processor 1002 and the memory 1003 are all connected to the bus 1004. The memory 1003 stores a set of programs, and the processor 1002 is configured to invoke a program stored in the memory 1003 to perform the following operations:

The transceiver 1001 receives the communication connection relationship between the M terminals and the L RRUs in the cell sent by the BBU, the M group downlink data, and the M group downlink resource allocation information, where one terminal corresponds to a group of downlink data and a group Downstream resources, M≥1, M is a positive integer;

And combining downlink resources and downlink data to be sent to each RRU according to the received communication connection relationship, the M group downlink data, and the allocation information;

Transmitting, by the transceiver 1001, the downlink resources and downlink data to be sent to the respective RRUs of the data combining unit are respectively sent to the respective RRUs;

The transceiver 1001 transmits downlink data and downlink resources corresponding to terminals that have communication connection with any one of the RRUs to any one of the RRUs.

The processor 1002 may be a central processing unit (CPU), a network processor (NP), or a combination of a CPU and an NP.

The processor 1002 may further include a hardware chip. The hardware chip may be an application-specific integrated circuit (ASIC), a programmable logic device (PLD), or a combination thereof. The PLD may be a complex programmable logic device (CPLD), a field-programmable gate array (FPGA), a general array logic (GAL), or any combination thereof.

The memory 1003 may include a volatile memory such as a random-access memory (RAM); the memory 1003 may also include a non-volatile memory such as a flash memory (flash) Memory), hard disk drive (HDD) or solid-state drive (SSD); the memory 1003 may also include a combination of the above types of memories.

It should be noted that the connection manner in FIG. 10 is only an example, and may also be other possible connection manners.

The application also provides a base station, including a BBU, a RHUB, and an L located in the same cell. And an RRU, wherein the BBU is connected to the RHUB, and the L RRUs are all connected to the RHUB, L≥2, and L is a positive integer. The BBU may be the device provided by the embodiment corresponding to FIGS. 7 and 9. The RHUB may be the device provided by the embodiment corresponding to FIGS. 8 and 10. The base station is configured to perform the method of the embodiment corresponding to FIG. 2.

Those skilled in the art will appreciate that embodiments of the present application can be provided as a method, system, or computer program product. Thus, the present application can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment in combination of software and hardware. Moreover, the application can take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) including computer usable program code.

The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the present application. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computer program instructions can be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing device to produce a machine for the execution of instructions for execution by a processor of a computer or other programmable data processing device. Means for implementing the functions specified in one or more of the flow or in a block or blocks of the flow chart.

The computer program instructions can also be stored in a computer readable memory that can direct a computer or other programmable data processing device to operate in a particular manner, such that the instructions stored in the computer readable memory produce an article of manufacture comprising the instruction device. The apparatus implements the functions specified in one or more blocks of a flow or a flow and/or block diagram of the flowchart.

These computer program instructions can also be loaded onto a computer or other programmable data processing device such that a series of operational steps are performed on a computer or other programmable device to produce computer-implemented processing for execution on a computer or other programmable device. The instructions provide steps for implementing the functions specified in one or more of the flow or in a block or blocks of a flow diagram.

Although a preferred embodiment of the present application has been described, one of ordinary skill in the art will recognize Additional changes and modifications to these embodiments can be made in the basic inventive concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and the modifications and

It is apparent that those skilled in the art can make various changes and modifications to the embodiments of the present application without departing from the spirit and scope of the embodiments of the present application. Thus, it is intended that the present invention cover the modifications and variations of the embodiments of the present invention.

Claims

A method for transmitting data by a base station, where the base station includes a baseband processing unit BBU, a radio remote unit hub RHUB, and L radio remote units RRU located in the same cell, wherein the BBU and the BBU are RHUB connection, the L RRUs are all connected to the RHUB, L≥2, L is a positive integer; the method includes:

The BBU acquires a communication connection relationship between the M terminals in the cell and the L RRUs;

The BBU generates, for the M terminals, M group downlink resources, and generates allocation information of the M group downlink data to be sent to the M terminals, where one terminal corresponds to a group of downlink resources and a group of downlink data, M≥1, M is a positive integer;

Sending, by the BBU, the communication connection relationship, the M group downlink data, and the M group downlink resource allocation information to the RHUB, where the RHUB sends to any one of the RRUs: has communication with any one of the RRUs. The downlink data and downlink resources corresponding to the connected terminal.
The method according to claim 1, wherein the BBU allocates M sets of downlink resources to the M terminals according to the following allocation rule:

If the first terminal and the second terminal of the M terminals have a communication connection with the same RRU, allocate different downlink resources to the first terminal and the second terminal;

If the RRU having the communication connection relationship with the first terminal is different from the RRU having the communication connection with the third terminal, the first terminal and the third terminal are allocated the downlink resource with the largest degree of coincidence. The three terminals are any one of the M terminals except the first terminal and the second terminal.
The method according to claim 1 or 2, wherein the BBU, after acquiring the communication connection relationship, before generating the allocation information, further includes:

Determining, according to the communication connection relationship, a ratio of a number of terminals having a communication connection with at least two RRUs to an M; and

It is determined that the ratio is less than a set ratio threshold.
The method according to any one of claims 1 to 3, wherein the BBU acquisition office The communication connection relationship between the M terminals and the L RRUs includes:

The BBU listens to the periodic signal reported by the RHUB, and the RHUB forwards the periodic signals received by the RRUs to the BBUs in sequence according to the polling order, where the periodic signals carry the identification information of the terminals. ;

When the BBU detects that the periodic signal received on the RRU exceeds the set strength threshold, the BBU determines the terminal corresponding to the identifier information of the terminal currently carried by the periodically detected periodic signal and the currently monitored RRU. Has a communication connection.
A method for transmitting data by a base station, where the base station includes a baseband processing unit BBU, a radio remote unit hub RHUB, and L radio remote units RRU located in the same cell, wherein the BBU and the BBU are RHUB connection, the L RRUs are all connected to the RHUB, L≥2, L is a positive integer; the method includes:

The RHUB receives, by the BBU, a communication connection relationship between the M terminals in the cell and the L RRUs, M group downlink data, and M group downlink resource allocation information, where one terminal corresponds to a group Downstream data and a set of downlink resources, M≥1, M is a positive integer;

The RHUB combines the downlink resource and the downlink data to be sent to each RRU according to the communication connection relationship, the M group downlink data, and the allocation information, and sends the downlink resource and the downlink data to each RRU;

The RHUB sends downlink data and downlink resources corresponding to the terminal that has a communication connection with any one of the RRUs to any one of the RRUs.
A baseband processing unit BBU, wherein the base station includes the BBU, a radio remote unit hub RHUB, and L radio remote units RRU located in the same cell, wherein the BBU is connected to the RHUB The L RRUs are all connected to the RHUB, L≥2, and L is a positive integer; the BBU includes:

An acquiring unit, configured to acquire a communication connection relationship between the M terminals in the cell and the L RRUs;

And an allocation unit, configured to generate, for the M terminals, M group downlink resources, and generate allocation information of the M group downlink data to be sent to the M terminals, where one terminal corresponds to a group of downlink resources and a group of downlinks Data, M≥1, M is a positive integer;

a sending unit, configured to send the communication connection relationship, the M group downlink data, and the allocation information of the M group downlink resources to the RHUB, where the RHUB sends the RHUB to any one of the RRUs: Downlink data and downlink resources corresponding to the terminal having the communication connection.
The BBU of claim 6 wherein said allocating unit is for:

If the first terminal and the second terminal of the M terminals have a communication connection with the same RRU, allocate different downlink resources to the first terminal and the second terminal;

If the RRU having the communication connection relationship with the first terminal is different from the RRU having the communication connection with the third terminal, the first terminal and the third terminal are allocated the downlink resource with the largest degree of coincidence. The three terminals are any one of the M terminals except the first terminal and the second terminal.
The BBU according to claim 6 or 7, further comprising: a determining unit, configured to calculate at least two according to the communication connection relationship before the generating the distribution information, after acquiring the communication connection relationship Each of the RRUs has a ratio of the number of terminals connected to the communication with M; and, the ratio is determined to be less than a set ratio threshold.
The BBU according to any one of claims 6 to 8, wherein the obtaining unit is configured to:

Listening to the periodic signal reported by the RHUB, wherein the RHUB forwards the periodic signal received on each RRU to the acquiring unit in sequence according to the polling order, where the periodic signal carries the identification information of the terminal;

Whenever the periodic signal received on an RRU exceeds the set strength threshold, it is determined that the terminal corresponding to the identifier information of the terminal currently carried by the periodically detected periodic signal has a communication connection with the currently listening RRU. .
A radio remote unit hub RHUB, wherein the base station includes a baseband processing unit BBU, the RHUB, and L radio remote units RRU located in the same cell, wherein the BBU is connected to the RHUB The L RRUs are all connected to the RHUB, L≥2, and L is a positive integer; the RHUB includes:

a receiving unit, configured to receive, by the BBU, a communication connection relationship between the M terminals in the cell and the L RRUs, M group downlink data, and M group downlink resource allocation information, where one terminal corresponds to a set of downlink data and a set of downlink resources, M≥1, M is a positive integer;

a data combining unit, configured to combine downlink resources and downlink data to be sent to each RRU according to the communication connection relationship, the M group downlink data, and the allocation information received by the receiving unit;

a sending unit, configured to send, to the respective RRUs, the downlink resources and the downlink data to be sent to the respective RRUs by combining the data combining units;

The sending unit sends downlink data and downlink resources corresponding to the terminal that has a communication connection with any one of the RRUs to any one of the RRUs.