WO2018098695A1

WO2018098695A1 - Uplink data transmission method, rhub and bbu

Info

Publication number: WO2018098695A1
Application number: PCT/CN2016/108046
Authority: WO
Inventors: 彭劲东
Original assignee: 华为技术有限公司
Priority date: 2016-11-30
Filing date: 2016-11-30
Publication date: 2018-06-07
Also published as: CN109417832A

Abstract

Provided are an uplink data transmission method, an RHUB and a BBU. The RHUB acquires a receiving moment of uplink data sent from a first PRRU; and when the receiving moment is located within a transmission time interval (TTI) corresponding to a group identifier of a PRRU group to which the first PRRU belongs, the RHUB reports the uplink data to a corresponding baseband processing unit (BBU), wherein group identifiers of PRRU groups, the coverage ranges of which are adjacent and which belong to different cells, correspond to different TTIs. By means of the uplink data transmission method, the RHUB and the BBU provided in the embodiments of the present application, PRRUs, the coverage ranges of which are adjacent and which belong to different cells, transmit uplink data at different TTIs, thereby avoiding the interference between adjacent cells, reducing interference over thermal between adjacent cells, improving an SINR and increasing the throughput rate of a cell.

Description

Uplink data transmission method, RHUB and BBU

Technical field

The present application relates to the field of communications technologies, and in particular, to an uplink data transmission method, a RHUB, and a BBU.

Background technique

The LampSite indoor coverage solution implements multiple pico radio remote unit (pRRU) common cells by means of RF combined + independent demodulation. Among them, multiple pRRUs are implemented on the remote signal forwarding unit RHUB. Radio frequency combining, each cell implements independent demodulation. Each RHUB can manage at least one cell, and after receiving the uplink data sent by the user equipment, multiple pRRUs in each cell will uplink data by managing the RHUB of the cell. Reported to the baseband processing unit BBU.

However, in the actual application, when the first pRRU in the first cell receives the uplink data A reported by the high-powered Cell Edge User (CEU), the signal transmitted by the high-power CEU is far away, so In the second cell adjacent to the coverage of the first cell, the second pRRU that is closer to the first pRRU may also receive the uplink data A, where the second cell and the first cell may be managed by the same RHUB. The second pRRU is mainly used to receive the uplink data B sent by the CEU or the cell center user (CCU) in the second cell, and then the uplink data is reported in the second pRRU. The uplink data A and the uplink data B are reported together to the RBUB, and the RHUB reports the uplink data A and the uplink data B to the BBU.

When the RHUB reports the uplink data B and the uplink data A to the BBU, the uplink data A signal strength is strong, and the signal carrying the uplink data A interferes with the signal carrying the uplink data B, resulting in an average interference rise between adjacent cells. (Interference over thermal (IoT) is large, so that the signal to interference plus noise ratio (SINR) is low, and the cell throughput rate is low.

Summary of the invention

The present application provides an uplink data transmission method, a RHUB, and a BBU to avoid interference between adjacent cells, reduce average interference rise between adjacent cells, improve SINR, and improve cell throughput.

In a first aspect, the present application provides an uplink data transmission method, where the method is applied to a remote signal forwarding unit RHUB in a distributed system, and each cell managed by the RHUB includes at least Two PRRU groups, each PRRU group includes at least one PRRU, and the method includes:

Receiving, by the RHUB, a receiving moment of uplink data sent by the first PRRU, where the first PRRU is a PRRU in a cell managed by the RHUB;

When the receiving time is located in the transmission time interval TTI corresponding to the group identifier of the PRRU group to which the first PRRU belongs, the RHUB reports the uplink data to the corresponding baseband processing unit BBU;

The group identifiers of the PRRU groups that are adjacent to each other and belong to different cells correspond to different TTIs.

In conjunction with the first aspect, in a first possible implementation manner of the first aspect, the method further includes:

When the RHUB determines that the UE is a preset UE corresponding to the first PRRU, the RHUB acquires a receiving moment of uplink data sent from the first PRRU.

With reference to the first aspect, in a second possible implementation manner of the first aspect, the method further includes:

When the RHUB receives the sounding reference signal reported by the first PRRU, the sounding reference signal is reported by the UE received by the first PRRU, and the RHUB reports the sounding reference signal to the corresponding BBU to And causing the BBU to determine a correspondence between the first PRRU and the UE according to the sounding reference signal.

With reference to the first aspect, in a third possible implementation manner of the first aspect, the method further includes:

The RHUB receives a notification message including a first correspondence relationship table and a second correspondence relationship table, where the first correspondence relationship table includes a correspondence between a group identifier of a plurality of groups of PRRU groups and a TTI, where each of the TTIs corresponds to a group identifier of the at least one PRRU group; the second correspondence table includes a correspondence between the plurality of groups of the first PRRUs and the preset UEs, where each of the first PRRUs corresponds to at least one preset UE.

In a second aspect, the present application provides an uplink data transmission method, which is applied to a first baseband processing unit BBU in a distributed system, where the first BBU manages a plurality of remote signal forwarding units RHUB, and the method includes:

The first BBU acquires location information of multiple first PRRUs in each cell;

The first BBU divides the multiple first PRRUs in each cell into at least two PRRU groups according to the location information of the multiple first PRRUs;

The first BBU determines a group identifier for each of the PRRU groups according to the location information of the first PRRU in each PRRU group, where the group identifiers of the PRRU groups that are adjacent to each other and belong to different cells are different.

Determining, by the first BBU, a transmission time interval TTI corresponding to each of the group identifiers, and determining to include A first correspondence table of correspondence between the group identifier and the TTI.

With reference to the second aspect, in a first possible implementation manner of the second aspect, the method further includes:

The first BBU receives a sounding reference signal sent by a plurality of first PRRUs in a RHUB management cell, where the sounding reference signal is sent by a user equipment UE that is connected to the first PRRU, and is forwarded to the first a BBU;

The first BBU determines a first PRRU corresponding to each UE according to the received multiple sounding reference signals, and determines a second correspondence table that includes a correspondence between the first PRRU and the UE.

With reference to the second aspect, in a second possible implementation manner of the second aspect, the determining, by the first BBU, the first PRRU corresponding to each UE, according to the received multiple sounding reference signals, includes:

When receiving the sounding reference signals sent by the plurality of first PRRUs from the same UE, the first BBU determines that the first PRRU with the strongest signal strength of the sounding reference signal is the first PRRU corresponding to the UE.

With reference to the second aspect, in a third possible implementation manner of the second aspect, the method further includes:

The first BBU sends a notification message including the first correspondence table and the second correspondence table to the RHUB.

With reference to the second aspect, in a fourth possible implementation manner of the second aspect, the method further includes:

The first BBU sends a synchronization message to the first PRRU of the multiple cells through the RHUB, and sends a synchronization message to the second BBU in the distributed system, where the synchronization message carries the synchronization information, so that the first BBU The plurality of first PRRUs are synchronized, and the second BBU is configured to synchronize the plurality of second PRRUs in the second BBU with the plurality of second PRRUs in the first BBU by using the synchronization information.

With reference to the second aspect, in a fifth possible implementation manner of the second aspect, the first BBU divides the multiple first PRRUs in each cell into at least two according to location information of the multiple first PRRUs. PRRU group, including:

The first BBU divides the multiple first PRRUs in each cell into two PRRU groups according to the location information of the multiple first PRRUs, where one of the PRRU groups in each cell corresponds to the first group. Identification, another PRRU group corresponds to the second group identifier;

The first BBU respectively determines a transmission time interval TTI corresponding to each of the group identifiers, including:

The first BBU determines that the TTI corresponding to the first group identifier is an odd TTI, and determines that the TTI corresponding to the second group identifier is an even TTI.

In a third aspect, the present application provides an uplink data transmission method, which is applied to a second baseband processing unit BBU, and includes:

The second BBU receives the synchronization message that carries the synchronization information sent by the first BBU;

The second BBU uses the synchronization information to implement synchronization between multiple second PRRUs in the second BBU and multiple first PRRUs in the first BBU.

In a fourth aspect, the application provides a remote signal forwarding unit RHUB, where the RHUB manages a cell that includes at least two PRRU groups, and each PRRU group includes at least one PRRU, and the device includes:

a processing module, configured to acquire a receiving moment of uplink data sent by the first PRRU, where the first PRRU is a PRRU in a cell managed by the RHUB;

a sending module, configured to report the uplink data to a corresponding baseband processing unit BBU when the receiving time is in a transmission time interval TTI corresponding to the group identifier of the PRRU group to which the first PRRU belongs; Group IDs of PRRU groups that are adjacent to each other and belong to different cells correspond to different TTIs.

With reference to the fourth aspect, in a first possible implementation manner of the fourth aspect, the processing module is further configured to: when determining that the UE is a preset UE corresponding to the first PRRU, acquiring the first PRRU The receiving time of the transmitted uplink data.

With reference to the fourth aspect, in a second possible implementation manner of the fourth aspect, the sending module is further configured to: when receiving the sounding reference signal reported by the first PRRU, the sounding reference signal is the first PRRU And receiving, by the received UE, the sounding reference signal to the corresponding BBU, so that the BBU determines a correspondence between the first PRRU and the UE according to the sounding reference signal.

With reference to the fourth aspect, in a third possible implementation manner of the fourth aspect, the RHUB further includes:

a receiving module, configured to receive a notification message that includes a first correspondence relationship table and a second correspondence relationship table, where the first correspondence relationship table includes a correspondence between a group identifier of the multiple groups of PRRU groups and a TTI, where each of the The TTI corresponds to the group identifier of the at least one PRRU group; the second correspondence table includes a correspondence between the first group of the first PRRU and the preset UE, and each of the first PRRUs corresponds to at least one preset UE.

In a fifth aspect, the application provides a baseband processing unit BBU, where the BBU manages multiple remote signal forwarding Unit RHUB, the BBU includes:

a receiving module, configured to receive location information of multiple first PRRUs in each cell;

a processing module, configured to acquire location information of multiple first PRRUs in each cell; and divide multiple first PRRUs in each cell into at least two PRRU groups according to the location information of the multiple first PRRUs; Determining, according to the location information of the first PRRU in each PRRU group, a group identifier for each of the PRRU groups, where the group identifiers of the PRRU groups that are adjacent to each other and belong to different cells are different; The group identifies a corresponding transmission time interval TTI, and determines a first correspondence table including a correspondence between the group identifier and the TTI.

With reference to the fifth aspect, in a first possible implementation manner of the fifth aspect, the receiving module is further configured to receive a sounding reference signal sent by a plurality of first PRRUs in a RHUB management cell, where the sounding reference signal is The first PRRU establishes a connection with the user equipment UE, and is forwarded to the first BBU by the RHUB;

The processing module is further configured to determine, according to the received multiple sounding reference signals, a first PRRU corresponding to each UE, and determine a second correspondence relationship table that includes a correspondence between the first PRRU and the UE.

With reference to the fifth aspect, in a second possible implementation manner of the fifth aspect, the processing module is further configured to: when receiving the sounding reference signals sent by the multiple first PRRUs from the same UE, determining to receive the sounding reference signal The first PRRU with the strongest signal strength is the first PRRU corresponding to the UE.

With reference to the fifth aspect, in a third possible implementation manner of the fifth aspect, the BBU further includes:

And a sending module, configured to send, to the RHUB, a notification message that includes the first correspondence table and the second correspondence table.

With reference to the fifth aspect, in a fourth possible implementation manner of the fifth aspect, the sending module is further configured to send, by using the RHUB, a synchronization message to a first PRRU of the multiple cells, and to the distributed system The second BBU sends a synchronization message, where the synchronization message carries the synchronization information, so that the multiple first PRRUs in the first BBU are synchronized, and the second BBU is used to implement the second BBU by using the synchronization information. The plurality of second PRRUs are synchronized with the plurality of second PRRUs under the first BBU.

With reference to the fifth aspect, in a fifth possible implementation manner of the fifth aspect, the processing module is further configured to divide the multiple first PRRUs in each cell according to location information of the multiple first PRRUs The two PRRU groups, wherein one PRRU group in each cell corresponds to the first group identifier, and the other PRRU group corresponds to the second group identifier; determining that the TTI corresponding to the first group identifier is an odd TTI, and determining The TTI corresponding to the two sets of identifiers is an even TTI.

In a sixth aspect, the application provides a baseband processing unit BBU, including:

a receiving module, configured to receive a synchronization message that is sent by the first BBU and that carries the synchronization information;

And a processing module, configured to use the synchronization information to implement synchronization between multiple second PRRUs in the second BBU and multiple first PRRUs in the first BBU.

The uplink data transmission method, the RHUB, and the BBU provided by the embodiment of the present application, when the RHUB is located at a specific TTI, that is, a TTI corresponding to the group identifier of the PRRU group to which the first PRRU belongs, The uplink data is reported to the corresponding baseband processing unit BBU, and the group identifiers of the PRRU groups that are adjacent to each other and belong to different cells correspond to different TTIs. Therefore, the PRRUs that are adjacent to each other and belong to different cells are transmitted in different TTIs. Uplink data can avoid interference between adjacent cells, reduce average interference rise between adjacent cells, improve SINR, and improve cell throughput.

DRAWINGS

In order to more clearly illustrate the technical solutions of the present application, the drawings used in the embodiments will be briefly described below. Obviously, for those skilled in the art, without any creative labor, Other drawings can also be obtained from these figures.

1 is a schematic diagram of a network architecture of a distributed system, according to an exemplary embodiment;

2 is a schematic diagram of a network architecture of a closed loop, according to an exemplary embodiment;

FIG. 3 is a flowchart of an uplink data transmission method according to an exemplary embodiment;

FIG. 4 is a schematic diagram of a network architecture for transmitting uplink data according to an exemplary embodiment; FIG.

FIG. 5 is a schematic diagram of another network architecture for uplink data transmission according to an exemplary embodiment; FIG.

FIG. 6 is a schematic structural diagram of an RHUB according to an exemplary embodiment;

FIG. 7 is a schematic structural diagram of a first BBU according to an exemplary embodiment;

FIG. 8 is a schematic structural diagram of a second BBU according to an exemplary embodiment;

FIG. 9 is a schematic structural diagram of an RHUB according to an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a BBU according to an embodiment of the present invention.

detailed description

Exemplary embodiments will be described in detail herein, examples of which are illustrated in the accompanying drawings. The following description refers to the same or similar elements in the different figures unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present invention. Instead, they are merely examples of devices and methods consistent with aspects of the invention as detailed in the appended claims.

In order to make those skilled in the art better understand the technical solutions in the present invention, the technical solutions in the embodiments of the present invention will be described below in conjunction with the drawings in the embodiments of the present invention.

The uplink data transmission method provided by the embodiment of the present invention can be applied to an LTE (Long Term Evolution) communication system, for example, TDD-LTE (Time Division Duplex Long Term Evolution) or FDD-LTE (Frequency Division). Duplex Long Term Evolution, which can also be applied to other communication systems, such as WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access) , Time Division Synchronous Code Division Multiple Access), GSM (Global System for Mobile Communication) and 5G (Fifth Generation). The multiple systems listed above are only schematic illustrations of the embodiments of the present invention, and the method provided by the present invention is also applicable to other suitable communication systems, and the present invention is not limited thereto.

The embodiment of the present invention is described by taking an LTE communication system as an example. As shown in FIG. 1 , FIG. 1 is a schematic diagram of a network architecture of a distributed system that can be applied to an uplink data transmission method according to an embodiment of the present disclosure. FIG. 1 includes: at least two baseband processing units BBU 1 and multiple remotes. The terminal signal forwarding unit RHUB 2 and the plurality of micro radio frequency remote units PRRU 3, each BBU is connected to at least one RHUB, and each RHUB is connected to at least two PRRUs, wherein the BBU is used to belong to different RHUBs and belong to the same RRU group. The uplink data is weighted and summed, and the RHUB is used to perform weighted summation on uplink data from the same RRU group, and the PRRU is used to receive uplink data sent by the user equipment UE 4 in its coverage.

At least two PRRUs in the RHUB form at least one cell 5. The coverage area of at least one cell may be arranged in different manners according to different application scenarios, and may be arranged in a closed loop shape, for example, a circular shape or an elliptical shape (see FIG. 2). As shown in the figure), a rectangle or a triangle, etc., which may be uniformly distributed at equal intervals, etc., multiple PRRUs in each cell may be divided into at least two PRRU groups 6 (a plurality of cells are divided by a straight dotted line in FIG. 2) Since the coverage areas of the multiple cells are arranged in a closed loop shape, the coverage areas of the multiple PRRU groups in each cell are connected to form a segment of a closed loop shape, and each PRRU group includes at least one PRRU. .

To solve the technical problem of large inter-cell interference in a distributed system, as shown in FIG. 3, in an embodiment of the present invention, an uplink data transmission method is provided, and the method includes the following steps.

In step S101, the first BBU sends a synchronization message to the first PRRU of the plurality of cells through the RHUB, and sends a synchronization message to the second BBU in the distributed system.

In the embodiment of the present invention, the synchronization message carries the synchronization information, and the synchronization information may refer to the reference time of the reference BBU or the time difference between the reference BBU and the like, so that the plurality of first PRRUs in the first BBU utilize the The synchronization information is combined with the internal working clock to implement synchronization, and the second BBU is configured to implement multiple second PRRUs under the second BBU and multiple multiple first PRBUs according to the synchronization information and the internal working clock. The first PRRU is synchronized, and the synchronization mode may include air interface synchronization, GPS synchronization, and the like.

In this step, the first BBU may first send a synchronization message to the RHUB, and after receiving the synchronization message, the RHUB sends the synchronization message to multiple first PRRUs connected thereto, so that multiple firsts under the first BBU The PRRU can synchronize according to the synchronization information carried in the synchronization message, and the first BBU sends a synchronization message to the second BBU, so that multiple second PRRUs in the second BBU are synchronized with each other, and multiple second PRRUs are generated. Synchronized with a plurality of first PRRUs.

In step S102, the second BBU receives the synchronization message carrying the synchronization information sent by the first BBU.

In the embodiment of the present invention, after receiving the synchronization message, the second BBU sends a synchronization message to multiple second PRRUs under each RHUB through the RHUB under the second BBU.

In the step S103, the second BBU uses the synchronization information to implement synchronization of multiple second PRRUs in the second BBU with multiple first PRRUs in the first BBU.

In this step, the second BBU may extract the synchronization information in the synchronization message, and then combine the synchronization information and the working clock inside the second BBU to synchronize the plurality of second PRRUs in the second BBU.

In step S104, when the RHUB receives the sounding reference signal reported by the first PRRU, the RHUB reports the sounding reference signal to the corresponding BBU.

In the embodiment of the present invention, the sounding reference signal (SRS) is reported by the UE in the coverage of the first PRRU, and the SRS is used to provide the base station with the measurement basis of the uplink channel. Usually, the SRS is transmitted in a preset cycle. The step S104 can be used to facilitate the BBU to determine a correspondence between the first PRRU and the UE according to the sounding reference signal.

In this step, the RHUB can always detect whether the sounding reference signal reported by any of the first PRRUs is received. When receiving the sounding reference signal reported by any of the first PRRUs, the RHUB can receive the sounding reference signal. Reported to the BBU to which the RHUB is connected.

In step S105, the first BBU receives the sounding reference signals sent by the plurality of first PRRUs in the RHUB management cell.

In the embodiment of the present invention, the sounding reference signal is sent by the user equipment UE that establishes a connection with the first PRRU, and is forwarded to the first BBU by the RHUB.

In step S106, the first BBU determines a first PRRU corresponding to each UE according to the received multiple sounding reference signals, and determines a second correspondence table including a correspondence between the first PRRU and the UE.

In the embodiment of the present invention, when the UE sends the sounding reference signal, the signal strength of the sounding reference signals received by the different first PRRUs may be different due to different distances between different first PRRUs and the UE. Therefore, the step S106 may include The first BBU determines that the first PRRU with the strongest signal strength of the received sounding reference signal is the first PRRU corresponding to the UE, when the sounding reference signals sent by the multiple first PRRUs are received by the same UE.

In step S107, the first BBU acquires location information of multiple first PRRUs in each cell.

In the embodiment of the present invention, the location information of each first PRRU may be stored in a preset storage area or stored in a preset data table. The location information may refer to dividing the actual geographical area into a plurality of locations in advance. Blocks, and numbering each parcel, and then mapping and storing each first PRRU with the number of the parcel in which the first PRRU is located.

In this step, the first BBU may acquire location information of multiple first PRRUs in the preset storage location, or may acquire location information of multiple first PRRUs in the preset data table, and the like.

In step S108, the first BBU divides the multiple first PRRUs in each cell into at least two PRRU groups according to the location information of the multiple first PRRUs.

In this step, the first BBU may obtain a clockwise or counterclockwise arrangement order of the plurality of first PRRUs in the closed loop according to the location information of the multiple first PRRUs. When the PRRU group is divided, the first BBU may be configured. Divide according to the clockwise or counterclockwise order of the closed loop.

It is assumed that, in a counterclockwise order, the plurality of cells in the first BBU in the closed loop are the cell 1, the cell 2, and the cell 3, ..., wherein the cell 1 includes three first PRRUs, namely: PRRU1, PRRU2 And PRRU3, the cell 2 includes two first PRRUs, which are PRRU4 and PRRU5, respectively, and the cell 3 includes four first PRRUs, which are PRRU6, PRRU7, PRRU8, and PRRU9, respectively. When dividing the PRRU group, each cell may be determined first. The number of PRRU groups that are divided into two can be two, three, etc., and can be set according to actual conditions.

In a practical application, the first BBU may divide multiple first PRRUs in each cell into two PRRU groups according to location information of the multiple first PRRUs.

When it is determined that each cell is divided into two PRRU groups, PRRU1 in cell 1 may be divided into PRRU group 1, PRRU2 and PRRU3 may be divided into PRRU group 2, and PRRU1 and PRRU2 in cell 1 may be divided into PRRU group 1, PRRU3 can be divided into PRRU group 2 and so on; PRRU4 in cell 2 can be divided into PRRU group 1, PRRU5 can be divided into PRRU group 2; PRRU6 in cell 3 can be divided into PRRU group 1, PRRU7, PRRU8 and PRRU9 are divided into PRRU For group 2, PRRU6 and PRRU7 in cell 3 may also be divided into PRRU group 1, RRU8 and PRRU9 are divided into PRRU group 2 and the like.

In a practical application, the first BBU may divide the multiple first PRRUs in each cell into three consecutively arranged PRRU groups according to the location information of the multiple first PRRUs.

When it is determined that each cell is divided into three PRRU groups, the PRRU1 in the cell 1 may be divided into the PRRU group 1, the PRRU2 is divided into the PRRU group 2, the PRRU3 is divided into the PRRU group 3, and the like; the PRRU4 in the cell 2 may be divided into PRRU group 1, PRRU5 is divided into PRRU group 2, PRRU group 3 is empty, and so on. The empty PRRU group can be determined according to the actual situation; PRRU6 in cell 3 can be divided into PRRU group 1, and PRRU7 is divided into PRRU group 2, PRRU8 and PRRU9 are divided into PRRU group 3, and PRRU6 and PRRU7 in cell 3 may be divided into PRRU group 1, RRU8 is divided into PRRU group 2, PRRU9 is divided into PRRU group 3, and the like.

By analogy, multiple cells in the second BBU in the closed loop are also divided in this manner until all the cells in the closed loop are completely divided. It should be understood that in order to save resources, multiple BBUs are needed. The number of PRRU groups determined by each cell should be the same.

In step S109, the first BBU determines a group identifier for each of the PRRU groups according to location information of the first PRRU in each PRRU group.

In the embodiment of the present invention, the group identifiers of the PRRU groups that are adjacent to each other and belong to different cells are different, and the group identifiers of the PRRU groups in the same order in each cell are the same, and the group identifiers may be A. B and / or C, ..., can also be 001, 002 and / or 003, ..., can also be I, II and / or III, ..., can be determined according to the actual situation, the present invention is not here Make a limit.

When it is determined that each cell is divided into two PRRU groups, the first BBU may determine the group identifier of the PRRU group 1 in the cell 1 as A, and the group identifier of the PRRU group 2 is determined as B. Similarly, the PRRU group in the cell 2 The group identifier of the group 1 is determined as A, the group identifier of the PRRU group 2 is determined as B, the group identifier of the PRRU group 1 in the cell 3 is determined as A, and the group identifier of the PRRU group 2 is determined as B, .

When it is determined that each cell is divided into three PRRU groups, the first BBU may determine the group identifier of the PRRU group 1 in the cell 1 as 001, the group identifier of the PRRU group 2 is determined to be 002, and the group identifier of the PRRU group 3 is determined to be 003. Similarly, the group identity of the PRRU group 1 in the cell 2 is determined to be 001, the group identity of the PRRU group 2 is determined to be 002, the group identity of the PRRU group 3 is determined to be 003, and the group identity of the PRRU group 1 in the cell 3 is determined to be 001. The group identifier of the PRRU group 2 is determined to be 002, and the group identifier of the PRRU group 3 is determined to be 003, .

The first BBU may send the correspondence between the at least two PRRU groups and the group identifiers in each cell to each of the first PRRUs through the RHUB, so that the first PRRU sends the group identifier and the like together when reporting the uplink data.

In step S110, the first BBU determines a transmission time interval TTI corresponding to each of the group identifiers, and determines a first correspondence table including a correspondence between the group identifier and the TTI.

In the embodiment of the present invention, the transmission time interval (TTI) can be considered as 1TTI=1ms. When the first BBU does not send the corresponding relationship between the at least two PRRU groups and the group identifiers in each cell to each of the first PRRUs through the RHUB, the first BBU may also be added in the first correspondence: each group A correspondence between at least two PRRU groups in each cell is identified.

In this step, a corresponding TTI may be determined for each group identifier, and a first correspondence relationship between the group identifier and the TTI may be established.

When it is determined that each cell divides two PRRU groups, the first BBU may determine that the TTI corresponding to one of the group identifiers is an odd TTI, and determine that the TTI corresponding to the other group identifier is an even TTI, for example, in the cell 1 When the TTI corresponding to the PRRU group 1 is 1 ms, and the TTI corresponding to the PTTU group 2 is 2 ms, the TTI corresponding to the PRRU group 1 in the cell 2 is 1 ms, and the TTI corresponding to the PRRU group 2 is 2 ms.

When it is determined that each cell is divided into three PRRU groups, the first BBU may determine that the TTI corresponding to the group identifier of the PRRU group 1 is TTI%3=1, and the TTI corresponding to the group identifier of the PRRU group 2 is TTI%3. =2, the TTI corresponding to the group identifier of the PRRU group 3 is TTI%3=0, where % is the modulo operation, TTI%3=0 is the remainder of the TTI modulo 3 is 0, similarly, TTI%3 =1 and TTI%3=2, for example, the TTI corresponding to PRRU group 1 in cell 1 is 1 ms, the TTI corresponding to PRRU group 2 is 2 ms, the TTI corresponding to PRRU group 3 is 3 ms, and the PRRU group in cell 2 The corresponding TTI is 1 ms, the TTI corresponding to PRRU group 2 is 2 ms, and the TTI corresponding to PRRU group 3 is 3 ms, ....

In step S111, the first BBU sends a notification message including the first correspondence table and the second correspondence table to the RHUB. In the embodiment of the present invention, the first correspondence table includes a correspondence between a group identifier of a plurality of groups of PRRU groups and a TTI, and each of the TTIs corresponds to a group label of at least one PRRU group. The second correspondence table includes a correspondence between the first group of the first PRRUs and the preset UEs, and each of the first PRRUs corresponds to at least one preset UE.

In step S112, the RHUB receives a notification message including a first correspondence relationship table and a second correspondence relationship table.

In step S113, when the RHUB determines that the UE is a preset UE corresponding to the first PRRU, the RHUB acquires a receiving moment of uplink data sent from the first PRRU.

In the embodiment of the present invention, the first PRRU is a PRRU in a cell managed by the RHUB.

In the step, when the RHUB receives the uplink data reported by any of the first PRRUs, the RHUB determines, according to the uplink data, the first PRRU that reports the uplink data and the UE that sends the uplink data, according to the received second correspondence. And determining, by the UE, whether the UE is the same as the preset UE corresponding to the first PRRU, and if the UE is the same, determining that the UE is the preset UE corresponding to the first PRRU.

In the step S114, when the receiving time is located in the transmission time interval TTI corresponding to the group identifier of the PRRU group to which the first PRRU belongs, the RHUB reports the uplink data to the corresponding baseband processing unit BBU.

In the embodiment of the present invention, the group identifiers of the PRRU groups that are adjacent to each other and belong to different cells correspond to different TTIs.

In this step, the RHUB acquires the group identifier of the PRRU group to which the first PRRU belongs, and obtains the first correspondence table corresponding to the correspondence between the group identifier and the transmission time interval TTI, and acquires the group identifier corresponding to the group identifier. TTI.

The RHUB may determine the group identifier corresponding to the first PRRU according to the first correspondence relationship table, or determine the group identifier corresponding to the first PRRU according to the uplink data, and then determine the TTI corresponding to the group identifier according to the first correspondence relationship.

When the uplink data is received by the RHUB, the receiving time of receiving the uplink data is recorded, and then the receiving time is compared with the determined TTI. For example, when the determined TTI is 3 ms, it can be determined whether the receiving time is located at the 3 ms. If the data is located within the 3ms, the RHUB reports the received uplink data to the BBU connected to the RHUB.

In practical applications, it is assumed that the first PRRU in FIG. 1 is PRRU1, PRRU2, PRRU3, and PRRU4 in a counterclockwise order, and PRRU1 and PRRU2 are respectively a PRRU group 001 and a PRRU group 002 in one cell, and PRRU3 and PRRU4 are respectively The PRRU group 001 and the PRRU group 002 in a cell, because each cell contains two PRRU groups, the TTI corresponding to the PRRU group 001 in the two cells may be an odd TTI, and the PRRU group 002 The corresponding TTI is an even TTI. Therefore, when the odd TTI arrives, as shown in FIG. 4, PRRU1 and PRRU3 report the received uplink data to the BBU through the RHUB. When the even TTI arrives, as shown in FIG. 5, PRRU2 and The PRRU4 reports the received uplink data to the BBU through the RHUB.

In this manner, the uplink data transmission method, the RHUB, and the BBU provided by the embodiment of the present application are only when the RHUB is located at a specific TTI, that is, the TTI corresponding to the group identifier of the PRRU group to which the first PRRU belongs. The uplink data is reported to the corresponding baseband processing unit BBU, and the group identifiers of the PRRU groups that are adjacent to each other and belong to different cells correspond to different TTIs. Therefore, the PRRUs that are adjacent to each other and belong to different cells are different. The TTI transmits uplink data, thereby avoiding interference between adjacent cells, reducing average interference rise between adjacent cells, improving SINR, and improving cell throughput.

As shown in FIG. 6 , in another embodiment of the present invention, a remote signal forwarding unit RHUB is provided, where a cell managed by the RHUB includes at least two PRRU groups, and each PRRU group includes at least one PRRU. The device includes:

The processing module 11 is configured to acquire a receiving moment of uplink data sent by the first PRRU, where the first PRRU is a PRRU in a cell managed by the RHUB;

The sending module 12 is configured to report the uplink data to the corresponding baseband processing unit BBU when the receiving time is located in a transmission time interval TTI corresponding to the group identifier of the PRRU group to which the first PRRU belongs; Group IDs of PRRU groups that are adjacent to each other and belong to different cells correspond to different TTIs.

In a further embodiment of the present invention, the processing module is further configured to: when determining that the UE is a preset UE corresponding to the first PRRU, acquire a receiving moment of uplink data sent from the first PRRU.

In a further embodiment of the present invention, the sending module is further configured to: when receiving the sounding reference signal reported by the first PRRU, the sounding reference signal is reported by the UE received by the first PRRU, and The sounding reference signal is reported to the corresponding BBU, so that the BBU determines the correspondence between the first PRRU and the UE according to the sounding reference signal.

In still another embodiment of the present invention, the RHUB further includes:

The receiving module 13 is configured to receive a notification message that includes a first correspondence relationship table and a second correspondence relationship table, where the first correspondence relationship table includes a correspondence between a group identifier of the multiple groups of PRRU groups and the TTI, where each The TTI corresponds to a group identifier of the at least one PRRU group; the second correspondence table includes a correspondence between the first group of the first PRRUs and the preset UEs, and each of the first PRRUs corresponds to at least one preset UE.

As shown in FIG. 7, in another embodiment of the present invention, a baseband processing unit BBU is provided, where the BBU manages a plurality of remote signal forwarding units RHUB, and the BBU includes:

The receiving module 21 is configured to receive location information of multiple first PRRUs in each cell.

The processing module 22 is configured to acquire location information of multiple first PRRUs in each cell, and divide multiple first PRRUs in each cell into at least two PRRU groups according to the location information of the multiple first PRRUs. Determining, according to the location information of the first PRRU in each PRRU group, a group identifier for each of the PRRU groups, where the group identifiers of the PRRU groups that are adjacent to each other and belong to different cells are different; The group identifies a corresponding transmission time interval TTI, and determines a first correspondence table including a correspondence between the group identifier and the TTI.

In a further embodiment of the present invention, the receiving module is further configured to receive a sounding reference signal sent by multiple first PRRUs in a RHUB management cell, where the sounding reference signal is a user equipment that is connected to the first PRRU. The UE sends and forwards to the first BBU through the RHUB;

In a further embodiment of the present invention, the processing module is further configured to: when receiving the sounding reference signals sent by the plurality of first PRRUs from the same UE, determine that the signal strength of the sounding reference signal is the strongest. The PRRU is a first PRRU corresponding to the UE.

In still another embodiment of the present invention, the BBU further includes:

The sending module 23 is configured to send, to the RHUB, a notification message that includes the first correspondence table and the second correspondence table.

In a further embodiment of the present invention, the sending module is further configured to send, by using the RHUB, a synchronization message to a first one of the plurality of cells, and send a synchronization message to the second BBU in the distributed system. The synchronization message carries the synchronization information to synchronize the plurality of first PRRUs in the first BBU, and the second BBU is configured to implement the multiple second PRRUs in the second BBU by using the synchronization information. A plurality of second PRRUs under the first BBU are synchronized.

In a further embodiment of the present invention, the processing module is further configured to divide the multiple first PRRUs in each cell into two PRRU groups according to the location information of the multiple first PRRUs, where One PRRU group in each cell corresponds to the first group identifier, and the other PRRU group corresponds to the second group identifier; The corresponding TTI is an odd TTI, and it is determined that the TTI corresponding to the second group identifier is an even TTI.

As shown in FIG. 8, in another embodiment of the present invention, a baseband processing unit BBU is provided, including:

The receiving module 31 is configured to receive a synchronization message that is sent by the first BBU and that carries the synchronization information.

The processing module 32 is configured to use the synchronization information to implement synchronization between multiple second PRRUs in the second BBU and multiple first PRRUs in the first BBU.

As shown in FIG. 9, the RHUB 900 includes a transmitter 901, a receiver 902, a processor 903, a memory 904, and an antenna 905. The transmitting module 12 in the embodiment shown in FIG. 6 can be implemented by the function in FIG. The transmitter 901 of the RHUB is implemented, or can also be implemented by the transmitter 901 controlled by the processor 903. The function to be implemented by the receiving module 13 in the embodiment shown in FIG. 6 can be implemented by the receiver 902 of the RHUB in FIG. Alternatively, the processor 903 can be implemented by the processor 903. The processing module 11 in the embodiment shown in FIG. 6 can be implemented by the processor 903 of the terminal device in FIG. The program instructions executed by the processor 903 are stored.

As shown in FIG. 10, the BBU 1000 includes a transmitter 1001, a receiver 1002, a processor 1003, a memory 1004, and an antenna 1005. The transmitting module 23 in the embodiment shown in FIG. 7 can be implemented by the function in FIG. The transmitter 1001 of the BBU is implemented, or can also be implemented by the transmitter 1001 controlled by the processor 1003, the receiving module 21 in the embodiment shown in FIG. 7, the receiving module 31 in the embodiment shown in FIG. The function may be implemented by the receiver 1002 of the BBU in Fig. 10, or may also be implemented by the receiver 1002 controlled by the processor 1003, the processing module 22 in the embodiment shown in Fig. 7, the processing in the embodiment shown in Fig. 8. The function to be implemented by the module 32 can be implemented by the processor of the terminal device in FIG. 10, 1003, which is used to store program instructions executed by the processor 1003.

In a specific implementation, the present application further provides a computer storage medium, wherein the computer storage medium may store a program, and the program may include some or all of the steps in the foregoing embodiments. The storage medium may be a magnetic disk, an optical disk, a read-only memory (ROM: ROM) or a random access memory (RAM).

Those skilled in the art can clearly understand that the technology in the embodiment of the present application can be added by software. The way to a common hardware platform is implemented. Based on such understanding, the technical solution in the embodiments of the present application may be embodied in the form of a software product in essence or in the form of a software product, and the computer software product may be stored in a storage medium such as a ROM/RAM. , a diskette, an optical disk, etc., including instructions for causing a computer device (which may be a personal computer, server, or network device, etc.) to perform the methods described in various embodiments of the present application or portions of the embodiments.

The same and similar parts between the various embodiments in this specification can be referred to each other. The embodiments of the present application described above are not intended to limit the scope of the present application.

Claims

An uplink data transmission method is characterized in that the method is applied to a remote signal forwarding unit RHUB in a distributed system, and each cell managed by the RHUB includes at least two PRRU groups, and each PRRU group includes At least one PRRU, the method comprising:

Receiving, by the RHUB, a receiving moment of uplink data sent by the first PRRU, where the first PRRU is a PRRU in a cell managed by the RHUB;

When the receiving time is located in the transmission time interval TTI corresponding to the group identifier of the PRRU group to which the first PRRU belongs, the RHUB reports the uplink data to the corresponding baseband processing unit BBU;

The group identifiers of the PRRU groups that are adjacent to each other and belong to different cells correspond to different TTIs.
The method of claim 1, wherein the method further comprises:

When the RHUB determines that the UE is a preset UE corresponding to the first PRRU, the RHUB acquires a receiving moment of uplink data sent from the first PRRU.
The method of claim 2, wherein the method further comprises:

When the RHUB receives the sounding reference signal reported by the first PRRU, the sounding reference signal is reported by the UE received by the first PRRU, and the RHUB reports the sounding reference signal to the corresponding BBU to And causing the BBU to determine a correspondence between the first PRRU and the UE according to the sounding reference signal.
The method of claim 1, wherein the method further comprises:

The RHUB receives a notification message including a first correspondence relationship table and a second correspondence relationship table, where the first correspondence relationship table includes a correspondence between a group identifier of a plurality of groups of PRRU groups and a TTI, where each of the TTIs corresponds to a group identifier of the at least one PRRU group; the second correspondence table includes a correspondence between the plurality of groups of the first PRRUs and the preset UEs, where each of the first PRRUs corresponds to at least one preset UE.
An uplink data transmission method is characterized in that it is applied to a first baseband processing unit BBU in a distributed system, and the first BBU manages a plurality of remote signal forwarding units RHUB, the method comprising:

The first BBU acquires location information of multiple first PRRUs in each cell;

The first BBU divides the multiple first PRRUs in each cell into at least two PRRU groups according to the location information of the multiple first PRRUs;

The first BBU determines a group identifier for each of the PRRU groups according to the location information of the first PRRU in each PRRU group, where the group identifiers of the PRRU groups that are adjacent to each other and belong to different cells are different.

The first BBU determines a transmission time interval TTI corresponding to each of the group identifiers, and determines a first correspondence relationship table including a correspondence between the group identifier and the TTI.
The method of claim 5, wherein the method further comprises:

The first BBU receives a sounding reference signal sent by a plurality of first PRRUs in a RHUB management cell, where the sounding reference signal is sent by a user equipment UE that is connected to the first PRRU, and is forwarded to the first a BBU;

The first BBU determines a first PRRU corresponding to each UE according to the received multiple sounding reference signals, and determines a second correspondence table that includes a correspondence between the first PRRU and the UE.
The method according to claim 6, wherein the determining, by the first BBU, the first PRRU corresponding to each UE according to the received multiple sounding reference signals comprises:

When receiving the sounding reference signals sent by the plurality of first PRRUs from the same UE, the first BBU determines that the first PRRU with the strongest signal strength of the sounding reference signal is the first PRRU corresponding to the UE.
The method of claim 7, wherein the method further comprises:

The first BBU sends a notification message including the first correspondence table and the second correspondence table to the RHUB.
The method according to any one of claims 5 to 8, wherein the method further comprises:

The first BBU sends a synchronization message to the first PRRU of the multiple cells through the RHUB, and sends a synchronization message to the second BBU in the distributed system, where the synchronization message carries the synchronization information, so that the first BBU The plurality of first PRRUs are synchronized, and the second BBU is configured to synchronize the plurality of second PRRUs in the second BBU with the plurality of second PRRUs in the first BBU by using the synchronization information.
The method according to claim 9, wherein the first BBU divides the plurality of first PRRUs in each cell into at least two PRRU groups according to the location information of the multiple first PRRUs, including :

The first BBU divides the multiple first PRRUs in each cell into two PRRU groups according to the location information of the multiple first PRRUs, where one of the PRRU groups in each cell corresponds to the first group. Identification, another PRRU group corresponds to the second group identifier;

The first BBU respectively determines a transmission time interval TTI corresponding to each of the group identifiers, including:

The first BBU determines that the TTI corresponding to the first group identifier is an odd TTI, and determines that the TTI corresponding to the second group identifier is an even TTI.
An uplink data transmission method, which is applied to the second baseband processing unit BBU, and includes:

The second BBU receives the synchronization message that carries the synchronization information sent by the first BBU;

The second BBU uses the synchronization information to implement synchronization between multiple second PRRUs in the second BBU and multiple first PRRUs in the first BBU.
The remote signal forwarding unit RHUB is characterized in that: the cell managed by the RHUB includes at least two PRRU groups, and each PRRU group includes at least one PRRU, and the device includes:

a processing module, configured to acquire a receiving moment of uplink data sent by the first PRRU, where the first PRRU is a PRRU in a cell managed by the RHUB;

a sending module, configured to report the uplink data to a corresponding baseband processing unit BBU when the receiving time is in a transmission time interval TTI corresponding to the group identifier of the PRRU group to which the first PRRU belongs; Group IDs of PRRU groups that are adjacent to each other and belong to different cells correspond to different TTIs.
The RHUB according to claim 12, characterized in that

The processing module is further configured to: when determining that the UE is a preset UE corresponding to the first PRRU, acquire a receiving moment of uplink data sent from the first PRRU.
The RHUB according to claim 13, characterized in that

The sending module is further configured to: when the sounding reference signal reported by the first PRRU is received, the sounding reference signal is reported by the UE received by the first PRRU, and the sounding reference signal is reported to the corresponding BBU. So that the BBU determines a correspondence between the first PRRU and the UE according to the sounding reference signal.
The RHUB of claim 12, wherein the RHUB further comprises:

a receiving module, configured to receive a notification message that includes a first correspondence relationship table and a second correspondence relationship table, where The first correspondence table includes a group relationship between the group identifiers of the multiple groups of PRRU groups and the TTI, and each of the TTIs corresponds to a group identifier of at least one PRRU group; the second correspondence table includes multiple groups of the first group. Corresponding relationship between the PRRU and the preset UE, each of the first PRRUs corresponding to at least one preset UE.
A baseband processing unit BBU, the BBU managing a plurality of remote signal forwarding units RHUB, the BBU comprising:

a receiving module, configured to receive location information of multiple first PRRUs in each cell;

a processing module, configured to acquire location information of multiple first PRRUs in each cell; and divide multiple first PRRUs in each cell into at least two PRRU groups according to the location information of the multiple first PRRUs; Determining, according to the location information of the first PRRU in each PRRU group, a group identifier for each of the PRRU groups, where the group identifiers of the PRRU groups that are adjacent to each other and belong to different cells are different; The group identifies a corresponding transmission time interval TTI, and determines a first correspondence table including a correspondence between the group identifier and the TTI.
The BBU of claim 16 wherein:

The receiving module is further configured to receive a sounding reference signal sent by a plurality of first PRRUs in a RHUB management cell, where the sounding reference signal is sent by a user equipment UE that is connected to the first PRRU, and is forwarded to the RHUB. The first BBU;

The processing module is further configured to determine, according to the received multiple sounding reference signals, a first PRRU corresponding to each UE, and determine a second correspondence relationship table that includes a correspondence between the first PRRU and the UE.
The BBU of claim 17 wherein:

The processing module is further configured to: when receiving the sounding reference signals sent by the multiple first PRRUs from the same UE, determine that the first PRRU with the strongest signal strength of the received sounding reference signal is the first corresponding to the UE PRRU.
The BBU of claim 18, wherein the BBU further comprises:

And a sending module, configured to send, to the RHUB, a notification message that includes the first correspondence table and the second correspondence table.
A method according to any one of claims 16 to 19, wherein

The sending module is further configured to send, by using the RHUB, a synchronization cancellation to a first PRRU of the multiple cells. And transmitting a synchronization message to the second BBU in the distributed system, the synchronization message carrying synchronization information to synchronize the plurality of first PRRUs under the first BBU, and causing the second BBU to utilize the synchronization The information is implemented to synchronize multiple second PRRUs in the second BBU with multiple second PRRUs in the first BBU.
The method of claim 20 wherein:

The processing module is further configured to divide the multiple first PRRUs in each cell into two PRRU groups according to the location information of the multiple first PRRUs, where one of the PRRU groups in each cell corresponds to The first set of identifiers, the other PRRU group corresponding to the second set of identifiers; determining that the TTI corresponding to the first set of identifiers is an odd TTI, and determining that the TTI corresponding to the second set of identifiers is an even TTI.
A baseband processing unit BBU, comprising:

a receiving module, configured to receive a synchronization message that is sent by the first BBU and that carries the synchronization information;

And a processing module, configured to use the synchronization information to implement synchronization between multiple second PRRUs in the second BBU and multiple first PRRUs in the first BBU.