WO2018090854A1 - Communication method and apparatus - Google Patents

Abstract

A communication method and apparatus, relating to the technical field of wireless communications, which improves communication quality in full-duplex communication. The method is applied to a distributed base station, and the distributed base station comprises a base band unit (BBU) and at least one radio remote unit (RRU), wherein the BBU determines, according to a first terminal ID of a first terminal, a first RRU on the basis of a pre-stored correspondence between the terminal ID and the at least one RRU, determines a second RRU and a second terminal, then controls the carrying out of communication between the first terminal and the first RRU and the second terminal and the second RRU in the same time period and in the same frequency band. According to the present technical solution, since the first RRU and the second RRU are geographically far apart, the interference of the communication between the first terminal and the first RRU on the communication between the second terminal and the second RRU is relatively small, which thereby improves to a certain extent the communication quality in a process of full-duplex communication.

Description

Method and device for communication

The present application claims priority to Chinese Patent Application No. 201611004991.6, filed on Jan. 15, 2016, the entire disclosure of which is hereby incorporated by reference. .

Technical field

The present application relates to the field of wireless communication technologies, and in particular, to a method and device for communication.

Background technique

FD (Full Duplex) communication technology, as one of the candidate technologies in the next generation wireless access communication field, can perform uplink and downlink communication on the same frequency band at the same time, thereby doubling the transmission resource utilization rate and greatly reducing the end. -to-end (end-to-end) delay.

The existing full-duplex communication system includes a base station and at least one terminal. The full-duplex communication system shown in FIG. 1 includes a base station 100 and a terminal 110, a terminal 120, a terminal 130, a terminal 140, and a terminal 150. For a conventional base station, a BBU (Base Band Unit) and an RRU (Radio Remote Unit) are integrated together, and the terminal 110, the terminal 120, and the range included in the range covered by the base station 100 are integrated. When the terminal 130 needs to establish communication with the base station 100, the base station 100 establishes full-duplex communication from the terminal 110, the terminal 120, and the terminal 130, and selects two terminals with opposite data transmission directions from the base station 100, however, in full duplex. In the communication, the uplink communication between one terminal and the base station 100 interferes with the downlink communication between the other terminal and the base station 100, and correspondingly, the downlink communication between the other terminal and the base station 100 also corresponds to one of them. The uplink communication between the terminal and the base station 100 causes interference, and when the interference is large, it affects the accuracy of the data received or transmitted by the terminal, and the quality of the communication. Therefore, the optional full The way of duplex communication terminals may result in poor communication quality.

In this regard, in the prior art, in order to reduce interference between terminals when performing full-duplex communication, interference measurement is performed in advance between terminals, and measurement results are obtained, and the terminal transmits the measurement result to the base station, and the base station receives the measurement. After the result, based on the measurement results, it is determined which two terminals are to perform full duplex communication. However, the above technical solutions increase the overhead of the system and also bring about certain system complexity.

Based on the guarantee of communication quality, based on distributed base station, this application proposes a new way of full-duplex communication.

Summary of the invention

The application provides a communication method and device, which improves communication quality in full duplex communication.

The first aspect provides a communication method, which is applied to a distributed base station, where the distributed base station includes a BBU and at least one RRU, wherein the BBU is based on the pre-stored terminal according to the first terminal ID (Identification, ID) of the first terminal. The first RRU is determined by the correspondence between the ID and the at least one RRU. The first RRU corresponds to the first terminal ID, the first terminal is a terminal that needs to establish communication with the distributed base station by using the first RRU, and the BBU determines the second RRU, and the second The RRU is the RRU that is the farthest from the geographical location of the first RRU in the at least one RRU; the BBU determines the second terminal, the second terminal is in the second RRU management scope, and the terminal needs to establish communication with the distributed base station through the second RRU. The communication direction between the second terminal and the distributed base station is opposite to the communication direction between the first terminal and the distributed base station; the BBU controls between the first terminal and the first RRU, and between the second terminal and the second RRU. Same frequency in the same time period The band communicates.

It should be noted that the BBU controls the communication between the first terminal and the first RRU, and between the second terminal and the second RRU in the same frequency band in the same time period. Specifically, the BBU is between the first terminal and the first RRU. The communication, the communication between the second terminal and the second RRU are allocated resources in the same frequency band in the same time period.

And as a second terminal by selecting a terminal that is managed by the second RRU that is farthest from the first RRU and that is opposite to the communication direction between the distributed base station and the first terminal and the distributed base station, and then controls The first terminal and the distributed base station, and the second terminal and the distributed base station communicate in the same frequency band at the same time period, thereby realizing full-duplex communication, and the terminal determining the full-duplex communication under the distributed base station In a manner, since the first RRU and the second RRU are geographically far apart, the communication between the first terminal and the first RRU interferes less with the communication between the second terminal and the second RRU, and thus is to a certain extent The communication quality in the process of full-duplex communication is improved, and the measurement result is obtained by adding a new measurement step between the terminals in the prior art, and then determining the terminal for full-duplex communication according to the measurement result. In this way, the overhead of the terminal is reduced.

On the basis of the first aspect, the correspondence between the pre-stored terminal ID and the at least one RRU is that the BBU is stored in the following manner:

For any terminal in the jurisdiction of the distributed base station, the BBU sends a DMRS (De Modulation Reference Signal) or a SRS (Sounding Reference Signal) according to any terminal received by the at least one RRU. Determining, by the at least one RRU, the signal quality of the DMRS or the SRS respectively; then, the BBU determines the RRU that receives the highest signal quality of the DMRS or the SRS in the at least one RRU; and between the terminal ID of any terminal and the RRU with the highest signal quality Correspondence is stored.

Since the BBU determines the correspondence between the terminal ID and the RRU according to the DMRS or SRS sent by any terminal received by the at least one RRU, the DMRS and the SRS terminal itself need to be sent to the RRU, so there is no need to add a new one between the terminals. The measurement steps and the addition of new signals further reduce the overhead of the terminal.

On the basis of the first aspect, optionally, at least one RRU separately receives the signal quality of the DMRS or the SRS through a RSRP (Reference Signal Receiving Power) or a SINR (Signal to Interference plus Noise Ratio). To characterize.

Since the signal quality of the DMRS or SRS received by the at least one RRU can be characterized by RSRP or SINR, it is easy to implement in the specific implementation process, and the implementation possibility is improved.

On the basis of the first aspect, optionally, if the first RRU and the second RRU support MIMO (Multiple-Input Multiple-Output) communication, the first RRU includes N ₁ ×M ₁ antennas, The two RRUs include N ₂ ×M ₂ antennas, where N ₁ is the number of first RRU transmit antennas, M ₁ is the number of first RRU receive antennas, and N ₂ is the number of second RRU transmit antennas, M ₂ is the number of second RRU receiving antennas, and N ₁ , M ₁ , N ₂ , and M ₂ are positive integers greater than 1, respectively;

The BBU controls communication between the first terminal and the first RRU and between the second terminal and the second RRU in the same frequency band in the same time period by:

When the first terminal and the first RRU are in uplink communication, and the second terminal is in downlink communication with the second RRU, the BBU controls the uplink communication, the second terminal, and the second RRU between the first terminal and the first RRU. for downlink communication among the same frequency band at the same time, particularly, establishing an uplink communication between a first terminal and a first RRU F ₁ through reception antennas, establishing a second terminal and a second RRU transmission antennas by G ₁ In the downlink communication, 0<F ₁ ≤M ₁ , 0<G ₁ ≤N ₂ ; wherein the number of terminals establishing uplink communication with the first RRU is at least one, and the terminal establishing downlink communication with the second RRU At least one number;

When the first terminal and the first RRU are in the downlink communication, and the second terminal and the second RRU are in the uplink communication, the BBU controls the downlink communication, the second terminal, and the second RRU between the first terminal and the first RRU. The uplink communication is performed on the same frequency band in the same time period. Specifically, the downlink communication between the first terminal and the first RRU is established through the F ₂ transmit antennas, and the second terminal and the second RRU are established through the G ₂ receive antennas. Uplink communication between, 0<F ₂ ≤N ₁ , 0<G ₂ ≤M ₂ ; wherein, the number of terminals establishing downlink communication with the first RRU is at least one, and the terminal establishing uplink communication with the second RRU The number is at least one.

BBU uplink to establish communication between the first terminal and the first RRU F ₁ through receive antennas as an example.

Specifically, a method for establishing uplink communication between the first terminal and the first RRU is:

The BBU establishes uplink communication between the first terminal and the first RRU through all the receiving antennas. When the first terminal sends data to the first RRU through all the receiving antennas, the number of terminals that the first RRU can carry the uplink communication at the maximum W ₁ satisfied

N _ss (t) represents the number of data streams transmitted by the tth terminal.

Another way to establish uplink communication between the first terminal and the first RRU is as follows:

BBU from all the receive antennas in the first RRU, F ₁ selected receive antennas to establish an uplink communication between a first terminal and a first RRU, wherein the received signal quality of the received antenna F ₁ of greater than a preset threshold, the first RRU W capable of carrying the maximum number of terminal ₁ satisfies

N _ss (t) represents the number of data streams transmitted by the tth terminal.

Since the distributed base station performs full-duplex communication, MIMO communication is introduced, which greatly increases the utilization of transmission resources and further reduces the delay of data communication.

On the basis of the first aspect, optionally, if the first RRU supports MIMO communication, the first RRU includes N ₃ ×M ₃ antennas, where N ₃ is the number of the first RRU transmit antennas, and M ₃ is the first The number of RRU receiving antennas, N ₃ and M ₃ are positive integers greater than 1 respectively; after determining the first RRU, the BBU can also determine the third terminal, and the third terminal is within the management range of the first RRU, and The communication direction between the three terminals and the distributed base station is opposite to the communication direction between the first terminal and the distributed base station;

Specifically, when the first terminal and the first RRU are in uplink communication, and the third terminal is in downlink communication with the first RRU, the BBU controls the uplink communication between the first terminal and the first RRU, and the third terminal and The downlink communication between the first RRUs is performed on the same frequency band in the same time period, wherein the uplink communication between the first terminal and the first RRU is established through the F ₃ receiving antennas, and the third terminal and the third terminal are established through the G ₃ transmitting antennas. a downlink communication between the RRU, G ₃ respectively transmit antennas from receive antennas F ₃ N ₃ is not less than the transmission antennas in addition to other G ₃ transmit antennas and transmission antenna distance F ₃ receiving antennas, respectively; When the first terminal and the first RRU are in the downlink communication, and the third terminal is in the uplink communication with the first RRU, the BBU controls the downlink communication, the third terminal, and the first RRU between the first terminal and the first RRU. uplink communication performed between the same frequency band in the same time period, wherein establishing the downlink communication between the first terminal and the first RRU through F ₄ transmit antennas, establish a third terminal and the first RRU through G ₄ receive antennas Uplink communication G ₄ receive antennas and transmit antennas from F ₄ is not less than M ₃ receiving antennas other than G ₄ receiving antennas and the other receive antenna distance F ₄ receiving antennas, respectively.

Since the BBU supports MIMO communication in the first RRU, since the geographical position of the antenna for establishing communication with the first RRU by the third terminal is farther from the antenna for establishing communication between the first terminal and the first RRU, the BBU is improved. The communication quality between the third terminal and the first RRU, and between the first terminal and the first RRU, and in this way greatly increases the utilization of transmission resources, further reducing the delay of data communication.

On the basis of the first aspect, the first terminal is a terminal that meets preset scheduling criteria. Specifically, the BBU determines, according to preset scheduling criteria, all terminals that need to establish communication with the distributed base station. The first terminal is a terminal that meets a scheduling criterion condition, and then the BBU determines the first RRU.

Because the scheduling criteria are preset in the BBU, the system capacity can be maximized according to the criteria to ensure the user resource allocation fairness, and the system QOS (Quality of Service) is guaranteed.

It should be noted that, in the present application, the BBU controls the first terminal to communicate with the first RRU, the second terminal, and the second RRU in the same frequency band at the same time period, for example, the BBU may first control the first terminal and the first RRU. The communication between the two is carried over a certain frequency band at a certain time, and then the communication between the second terminal and the second RRU is controlled to be at the same time and frequency band as the communication between the first terminal and the first RRU. In the frequency band, the BBU can also control the communication between the first terminal and the first RRU, and the communication between the second terminal and the second RRU to the same frequency band at the same time.

In a second aspect, a baseband processing unit BBU is provided, including:

The processing module is configured to determine, according to the first terminal identifier ID of the first terminal, a first RRU, where the first RRU corresponds to the first terminal ID, and the first terminal is needed according to the corresponding relationship between the preset terminal ID and the at least one RRU. And establishing, by the first RRU, the terminal that communicates with the BBU; and after determining the second RRU, determining the second terminal; the second RRU is the RRU that is the farthest from the geographical location of the first RRU in the at least one RRU; a terminal that is within the scope of the two RRUs and needs to establish communication with the BBU through the second RRU; a communication direction between the second terminal and the second RRU and a communication direction between the first terminal and the first RRU;

And a control module, configured to control communication between the first terminal and the first RRU, and between the second terminal and the second RRU in the same frequency band at the same time period.

On the basis of the second aspect, optionally, the correspondence between the pre-stored terminal ID and the at least one RRU is that the processing module is stored in the following manner:

Determining, by any one of the terminals in the distributed base station, the signal quality of the DMRS or the SRS received by the at least one RRU according to the demodulation parameter signal DMRS or the channel sounding reference signal SRS sent by any terminal received by the at least one RRU; After determining the RRU with the highest signal quality of the DMRS or the SRS in the at least one RRU, the correspondence between the terminal ID of any terminal and the RRU with the highest signal quality is stored.

On the basis of the second aspect, optionally, the signal quality of the at least one RRU receiving the DMRS or the SRS respectively is characterized by a reference signal received power RSRP or a signal to noise ratio SINR.

On the basis of the second aspect, optionally, if the first RRU and the second RRU support multiple input multiple output MIMO communication, the first RRU includes N ₁ ×M ₁ antennas, and the second RRU includes N ₂ ×M ₂ An antenna, where N ₁ is the number of transmitting antennas of the first RRU, M ₁ is the number of receiving antennas of the first RRU, N ₂ is the number of transmitting antennas of the second RRU, and M ₂ is the number of transmitting antennas of the second RRU a number, N ₁ , M ₁ , N ₂ , M ₂ are positive integers greater than 1, respectively;

The control module controls communication between the first terminal and the first RRU, and between the second terminal and the second RRU in the same frequency band at the same time period, specifically for:

When the first terminal and the first RRU are in uplink communication, and the second terminal and the second RRU are in downlink communication, the uplink communication between the first terminal and the first RRU is controlled, and the second terminal and the second RRU are controlled. between a downlink communication performed between the same frequency band at the same time, wherein establishing an uplink communication between a first terminal and a first RRU F ₁ through reception antennas, establishing a second terminal and a second RRU transmission antennas by G ₁ Downlink communication, 0<F ₁ ≤M ₁ , 0<G ₁ ≤N ₂ ; wherein the number of terminals establishing uplink communication with the first RRU is at least one, and the number of terminals establishing downlink communication with the second RRU At least one;

When the first terminal and the first RRU are in the downlink communication, and the second terminal and the second RRU are in the uplink communication, the downlink communication between the first terminal and the first RRU is controlled, and the second terminal and the second RRU are controlled. The uplink communication is performed on the same frequency band in the same time period, wherein the F ₂ transmit antennas establish a downlink communication between the first terminal and the first RRU, and establish a second terminal between the second terminal and the second RRU through the G ₂ receive antennas. Establishing uplink communication, 0<F ₂ ≤N ₁ , 0<G ₂ ≤M ₂ ; wherein the number of terminals establishing downlink communication with the first RRU is at least one, and the number of terminals establishing uplink communication with the second RRU At least one.

On the basis of the second aspect, optionally, if the first RRU supports multiple input multiple output MIMO communication, the first RRU includes N ₃ ×M ₃ antennas, where N ₃ is the number of the first RRU transmit antennas, M ₃ is the number of the first RRU receiving antennas, N ₃ and M ₃ are positive integers greater than 1, respectively; the processing module is further configured to determine the third terminal, the third terminal is within the management range of the first RRU, and The communication direction between the three terminals and the distributed base station is opposite to the communication direction between the first terminal and the distributed base station;

The control module is further configured to: when the first terminal is in uplink communication with the first RRU, and the downlink communication between the third terminal and the first RRU, control uplink communication between the first terminal and the first RRU, and third The downlink communication between the terminal and the first RRU is performed on the same frequency band in the same time period, wherein the uplink communication between the first terminal and the first RRU is established through the F ₃ receiving antennas, and the third terminal is established through the G ₃ transmitting antennas. downlink communication between the first RRU and, G ₃ respectively transmit antennas from receive antennas F ₃ N ₃ is not less than the transmission antennas in addition to other G ₃ transmit antennas and transmitting antennas F ₃ receive antennas, distance;

When the first terminal and the first RRU are in the downlink communication, and the third terminal is in the uplink communication with the first RRU, the downlink communication between the first terminal and the first RRU and the third terminal and the first RRU are controlled. The uplink communication is performed on the same frequency band in the same time period, wherein the downlink communication between the first terminal and the first RRU is established through the F ₄ transmit antennas, and the third terminal and the first RRU are established through the G ₄ receive antennas. uplink communication, G ₄ receive antennas and transmit antennas from F ₄ is not less than M ₃ receiving antennas other than G ₄ receiving antennas and the other receive antenna distance F ₄ receiving antennas, respectively.

On the basis of the second aspect, optionally, the first terminal is a terminal that meets preset scheduling criteria.

In a third aspect, a distributed base station is provided, comprising any of the baseband processing units provided in the second aspect, and at least one radio remote unit RRU.

DRAWINGS

1 is a schematic diagram of a prior art full duplex communication application scenario;

2a is a schematic diagram of a full duplex communication application scenario of the present application;

2b is a schematic flowchart of a method for full duplex communication according to the present application;

3 is a schematic structural diagram of a baseband processing unit BBU according to the present application;

4 is a schematic structural diagram of hardware of a baseband processing unit BBU of the present application;

FIG. 5 is a schematic structural diagram of a distributed base station according to the present application.

detailed description

In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail below with reference to the accompanying drawings.

The method for full-duplex communication of the present application is applied to the scenario diagram shown in FIG. 2a. In FIG. 2a, the distributed base station includes a BBU, an RRU1, an RRU2, an RRU3, and an RRU4, where the terminal 1, the terminal 2, and the terminal 3 are The terminal 4, the terminal 5, the terminal 6, the terminal 7, and the terminal 8 are respectively within the jurisdiction of the distributed base station. Specifically, the terminal 1 and the terminal 2 are within the management scope of the RRU1, and the terminal 3 and the terminal 4 are in the management scope of the RRU 2. The terminal 5 and the terminal 6 are within the management scope of the RRU 3, and the terminal 7 and the terminal 8 are within the management range of the RRU 4. It should be noted that, in an actual application scenario, the number of RRUs included in the distributed base station is not limited to the number of RRUs included in the distributed base station shown in FIG. 2a, and the number of terminals in the management range of each RRU. It is not limited to the number shown in FIG. 2a. It is possible that there is no terminal within a certain period of time within the management scope of the RRU, and it is also possible that there are multiple terminals at a certain time within the management scope of the RRU. It should be understood that all terminals in the jurisdiction of the distributed base station in the present application are a set of terminals within the management scope of all RRUs under the distributed base station, wherein the jurisdiction of the distributed base station is all RRUs under the distributed base station. The union of the scope of management.

Taking the terminal 1 as an example, the terminal 1 is within the management scope of the RRU1, that is, the terminal 1 belongs to the RRU1 management. Specifically, when the terminal 1 is within the management range of the RRU1, in the half-duplex communication system, that is, the terminal 1 passes the RRU1. When communicating with the BBU, for example, when the BBU needs to transmit data to the terminal 1, the data is transmitted to the terminal 1 through the RRU1, and if the terminal 1 requests to transmit data to the BBU, the data is transmitted to the RRU1, and then the data is transmitted through the RRU1. To the BBU.

It should be understood that, in the present application, the terminal is also referred to as a UE (User Equipment). In addition, the terminal may also be referred to as an MS (Mobile Station), a mobile terminal, etc., optionally. The terminal can be a mobile phone, a tablet computer, a PDA (Personal Digital Assistant), a POS (Point of Sales), a car computer, a set top box, and the like.

In addition, the distributed base station in the present application can be applied to GSM (Global System for Mobile Communication), CDMA (Code Division Multiple Access) communication system, and LTE (Long Term Evolution). In a higher-mode communication system such as a communication system or a 5G, the distributed base station may be referred to as a BS (Base Station), a NodeB, an eNodeB (Evolved Node B, an evolved Node B), or the like.

Specifically, the distributed base station separates the baseband processing unit and the radio remote unit integrated in the conventional base station from the conventional base station, and generally includes a radio remote unit in the conventional base station, due to baseband processing. The small size of the unit makes the installation position very flexible. The RF remote unit is installed at the antenna end. The RF remote unit and the baseband processing unit are usually connected by optical fibers to form a new distributed base station solution. In the conventional manner, a plurality of cables are connected between the base station and the antenna. The cable cost is high, the transmission loss is large, the distance is short, and the cable itself is cumbersome, especially in the interior of the building. The construction is difficult, and the distributed base station solution is an economical and fast wireless network in the case where the position of the machine room or the machine room is not ideal. construction plan.

The method of full-duplex communication of the present application will be described in detail below by taking FIG. 2b as an example. The method can be applied to the system scenario of Figure 2a.

As shown in FIG. 2b, a method for full duplex communication according to an embodiment of the present invention includes:

Step 200: The BBU determines, according to preset scheduling criteria, a first terminal from all terminals that need to establish communication with the distributed base station, where the first terminal is a terminal that meets the scheduling criterion.

The terminal in the jurisdiction of the distributed base station includes all the terminals that need to establish communication with the distributed base station, for example, the terminal 1 to the terminal 8 are included in the jurisdiction of the distributed base station, and the terminal that needs to establish communication with the distributed base station is Terminal 1 and terminal 7.

It should be noted that when the BBU adopts the FDD (Frequency Division Duplexing) communication mode, the scheduling criterion may be used for transmitting data between the terminal and the distributed base station in the actual communication direction and the preset current frequency point. The direction is the same. For example, at time t, the BBU is in uplink communication at the current frequency. When the actual communication direction between the terminal and the distributed base station is that the terminal sends data to the base station, the terminal meets the scheduling criterion, that is, needs to be associated with the RRU. The terminal that establishes the uplink communication is the terminal that meets the scheduling criterion. For example, if the terminal 1 requests uplink communication at the current frequency, the BBU can use the terminal 1 as the first terminal; when the BBU adopts the TDD (Time Division Duplexing) communication mode. The scheduling criterion may be that the actual communication direction between the terminal and the distributed base station is the same as the direction of the preset current time slot for transmitting data, for example, at time t, the current time slot is a time slot of downlink communication, When the actual data transmission direction between the terminal and the distributed base station is that the distributed base station sends data to the terminal, the terminal satisfies the scheduling criterion, and is about to be needed. A terminal that establishes downlink communication with the RRU as the first terminal; when the BBU adopts a 5G communication mode or a higher communication mode (for example, a communication mode of 5G or more), since the uplink transmission is performed on each transmission resource in the 5G The downlink transmission may be performed. In this case, the scheduling criterion may be set to the n terminals with the highest priority in the terminal, where n may be set according to the actual situation, for example, in FIG. 2a, assume n =3, the order of priority from high to low is terminal 1, terminal 2, terminal 3, ..., terminal 7, then when terminal 1, terminal 2, terminal 3 need to communicate with the distributed base station, then terminal 1, The terminal 2 and the terminal 3 are terminals that satisfy a preset condition.

In addition, the scheduling criteria can also be set according to actual needs. The above description is only an explanation of the scheduling criteria, and does not limit the scope of setting the scheduling criteria.

It should be noted that step 200 is an optional step in the embodiment of the present invention. When the BBU is performing full-duplex communication, the BBU may select one terminal from the terminal that needs to establish communication with the distributed base station as the first terminal, and then perform step 201.

Step 201: The BBU determines, according to the first terminal ID of the first terminal, the first RRU according to the correspondence between the pre-stored terminal ID and the at least one RRU, where the first RRU is an RRU corresponding to the terminal ID of the first terminal.

Specifically, the correspondence between the terminal ID and the at least one RRU includes all the terminals in the jurisdiction of the distributed base station. Optionally, the BBU pre-stores the correspondence between the terminal ID and the at least one RRU according to the following manner:

Taking FIG. 2a as an example, all terminals included in the jurisdiction of the distributed base station are terminal 1, terminal 2, terminal 3, terminal 4, terminal 5, terminal 6, terminal 7, and terminal 8, and all RRUs included in the distributed base station are respectively RRU1, RRU2, RRU3, and RRU4, for the terminal 1, the BBU receives the DMRS sent by the terminal 1 according to the RRU1, the RRU2, the RRU3, and the RRU4, and determines the signal quality of the RRU1 receiving the DMRS, the signal quality of the RRU2 receiving the DMRS, and the RRU3 receiving the DMRS. Signal quality, RRU4 receives the signal quality of the DMRS, and then the BBU receives the signal quality of the DMRS from RRU1, RRU2, RRU3, and RRU4, respectively, and determines the RRU with the highest signal quality of the received DMRS, assuming that the receiving terminal 1 of the RRU1, RRU2, RRU3, and RRU4 The RRU with the highest signal quality of the incoming DMRS is RRU1, and the correspondence between the terminal ID of the terminal 1 and the RRU 1 is stored.

In order to facilitate implementation in a specific implementation, optionally, the signal quality of the at least one RRU receiving the DMRS or the SRS respectively is characterized by RSRP or SINR. In addition, the signal quality at which at least one RRU receives the DMRS or SRS, respectively, can also be characterized by other parameters that can be used to measure signal quality, such as bit error rate.

Specifically, the BBU performs uplink channel estimation and data demodulation on the DMRS received by the RRU1, and obtains the RSRP and/or SINR of the RRU1 receiving the DMRS.

The manner in which the correspondence between the terminal ID and the RRU of the BBU storage terminal 2 to the terminal 8 is similar to the manner in which the terminal ID of the BBU storage terminal 1 is associated with the RRU 1 is not described herein.

Optionally, in the present application, the BBU may also determine the RRU connection by receiving the SRS signal sent by the terminal by the RRU. Receive the signal quality of the SRS, and then find the RRU that receives the highest signal quality of the SRS, and store the correspondence between the terminal ID and the RRU that receives the highest signal quality of the SRS. Specifically, the RRU1 receives the SRS sent by the terminal, and the BBU performs uplink channel estimation and data demodulation on the SRS received by the RRU1, and then obtains the RSRP or SINR of the RRS1 receiving the SRS.

For example, if the terminal 1 to the terminal 8 are included in the scope of the distributed base station in FIG. 2a, the correspondence between the terminal ID of the terminal 1 and the terminal 8 and the RRU is stored in advance, as shown in Table 1.

Terminal ID	RRU
1	RRU1
2	RRU1
3	RRU2
4	RRU2
5	RRU3
6	RRU3
7	RRU4
8	RRU4

Generally, in which RRU is managed by the terminal, the signal quality of the signal sent by the RRU to the terminal is the highest. For example, if the terminal 1 and the terminal 2 are within the management range of the RRU 1, then in the terminals 1 to 8, the terminal 1 For example, RRU1 generally receives the signal quality of the terminal 1 in comparison with the signal quality of other RRU receiving terminals 1, but when there are too many terminals in the management range of the RRU1, or the terminal 1 is located at the edge of the RRU1 management range. In a special case, the DMRS or SRS sent by the RRU1 receiving terminal 1 is not necessarily the highest signal quality, so the BBU is also required to perform the determination. Therefore, the correspondence between the terminal ID and the at least one RRU is pre-stored in the above manner, thereby improving communication. the quality of.

Step 202: The BBU determines a second RRU, where the second RRU is the RRU that is the farthest from the geographic location of the first RRU in the at least one RRU.

For example, in FIG. 2a, assuming that the first RRU is RRU1, the second RRU is RRU4.

Step 203: The BBU determines a second terminal, where the second terminal is within the second RRU management scope, and the first terminal needs to establish communication with the distributed base station by using the second RRU, and the communication direction between the second terminal and the distributed base station is The communication direction between the first terminal and the distributed base station is reversed.

For example, if the first terminal and the distributed base station are in uplink communication, the second terminal and the distributed base station are in downlink communication, and vice versa, the first terminal and the distributed base station are in downlink communication, and the second terminal and the second terminal are The uplink communication between the distributed base stations.

As shown in FIG. 2a, if the first RRU is RRU1, the RRU that is farthest from the first RRU is RRU4, and when the first RRU is RRU3, the RRU farthest from the first RRU is RRU1, where the distance is The distance between the geographic locations of the RRUs.

Step 204: The BBU controls communication between the first terminal and the first RRU, and between the second terminal and the second RRU in the same frequency band in the same time period, so that the first terminal and the first RRU, the second terminal, and the second RRU It is possible to communicate on the same frequency band in the same time period.

It should be noted that, in the present application, the BBU controls the communication between the first terminal and the first RRU, and between the second terminal and the second RRU in the same frequency band in the same time period. Specifically, the BBU may be the first terminal first. The communication with the first RRU allocates resources on a certain frequency band for a certain period of time, and then allocates communication between the second terminal and the second RRU to be shared with the communication between the first terminal and the first RRU. The time period during which the resource is located and the same frequency band And the resources on the frequency band, the BBU may also allocate resources in the same frequency band for the communication between the first terminal and the first RRU and the communication between the second terminal and the second RRU at the same time period.

The BBU controls the communication between the first terminal and the first RRU, and the second terminal and the second RRU communicate in the same frequency band in the same time period. For example, the BBU can send the indication information to the first terminal to indicate that the BBU is the first one. Which time period in which the communication between the terminal and the first RRU is allocated, and which resource in the frequency band, similarly, the indication information sent by the BBU to the second terminal indicates which of the communication between the second terminal and the second RRU is allocated. A time period and a resource of which frequency band, wherein the BBU is the same time period and frequency band in which the communication between the first terminal and the first RRU and the resource allocated by the communication between the second terminal and the second RRU are located.

Since the first terminal is determined by the scheduling criterion, the communication direction between the management area of the RRU farthest from the geographical position of the first RRU and the communication between the first base station and the distributed base station is selected. The terminal with the opposite direction acts as the second terminal, and then implements full-duplex communication. The manner of determining the terminal of the full-duplex communication under the distributed base station is because the first RRU and the second RRU are geographically far apart, so The communication between the terminal and the first RRU has less interference to the communication between the second terminal and the second RRU, thereby improving the communication quality in the process of full duplex communication to a certain extent, and compared with the prior art. By adding a new measurement step between the terminals, the measurement result is obtained, and then the manner of the terminal for full-duplex communication is determined according to the measurement result, and the overhead of the terminal is reduced.

In addition, in the present application, in order to increase the utilization of transmission resources and further reduce the delay of data communication, MIMO communication technology may also be introduced in the distributed base station. Specifically, each RRU in the distributed base station supports MIMO communication. Or, some RRUs support MIMO communication. As shown in FIG. 2a, RRU1, RRU2, RRU3, and RRU3 all support MIMO communication, or some of RRU1, RRU2, RRU3, and RRU4 support MIMO communication, for example, RRU1 and RRU4 support MIMO communication. For example, MIMO communication is supported by RRU1 to RRU4. The number of transmitting antennas and the number of receiving antennas of RRU1, RRU2, RRU3, and RRU4 may be the same or different.

When the first RRU and the second RRU support MIMO communication, the first RRU includes N ₁ ×M ₁ antennas, and the second RRU includes N ₂ ×M ₂ antennas, where N ₁ is the number of first RRU transmit antennas, M ₁ is the number of receiving antennas of the first RRU, N ₂ is the number of transmitting antennas of the second RRU, and M ₂ is the number of receiving antennas of the second RRU, and N ₁ , M ₁ , N ₂ , and M ₂ are respectively greater than a positive integer of 1;

The BBU controls communication between the first terminal and the first RRU and between the second terminal and the second RRU in the same frequency band in the same time period by:

When the first terminal and the first RRU are in uplink communication, and the second terminal is in downlink communication with the second RRU, the BBU controls the uplink communication, the second terminal, and the second RRU between the first terminal and the first RRU. for downlink communication among the same frequency band at the same time, particularly, establishing an uplink communication between a first terminal and a first RRU F ₁ through reception antennas, establishing a second terminal and a second RRU transmission antennas by G ₁ In the downlink communication, 0<F ₁ ≤M ₁ , 0<G ₁ ≤N ₂ ; wherein the number of terminals establishing uplink communication with the first RRU is at least one, and the terminal establishing downlink communication with the second RRU At least one number;

When the first terminal and the first RRU are in the downlink communication, and the second terminal and the second RRU are in the uplink communication, the BBU controls the downlink communication, the second terminal, and the second RRU between the first terminal and the first RRU. The uplink communication is performed on the same frequency band in the same time period. Specifically, the downlink communication between the first terminal and the first RRU is established through the F ₂ transmit antennas, and the second terminal and the second RRU are established through the G ₂ receive antennas. Uplink communication between, 0 < F ₂ ≤ N ₁ , 0 < G ₂ ≤ M ₂ ; the number of terminals establishing downlink communication with the first RRU is at least one, and the number of terminals establishing uplink communication with the second RRU At least one.

BBU uplink to establish communication between the first terminal and the first RRU F ₁ through receive antennas as an example.

Specifically, a method for establishing uplink communication between the first terminal and the first RRU is:

The BBU establishes uplink communication between the first terminal and the first RRU through all the receiving antennas. When the first terminal sends data to the first RRU through all the receiving antennas, the number of terminals that the first RRU can carry the uplink communication at the maximum W ₁ satisfied

N _ss (t) represents the number of data streams transmitted by the tth terminal.

Another way to establish uplink communication between the first terminal and the first RRU is as follows:

BBU from all the receive antennas in the first RRU, F ₁ selected receive antennas to establish an uplink communication between a first terminal and a first RRU, wherein the received signal quality of the received antenna F ₁ of greater than a preset threshold, the first RRU W capable of carrying the maximum number of terminal ₁ satisfies

N _ss (t) represents the number of data streams transmitted by the tth terminal.

Specifically, as shown in FIG. 2a, it is assumed that the first RRU is RRU1, and if the terminal that carries two uplink communications in the RRU1 is the terminal 1 and the terminal 2, where the terminal 1 and the terminal 2 are respectively used for establishing an uplink communication with the RRU1. The number can vary.

BBU when establishing the downlink communication between the second terminal and the second _{RRU. 1} through G transmission antennas, establishing a downlink communication between the first terminal and the first RRU transmitting antennas by F _2, Establishment of _two receiving antennas by G where the BBU uplink communication between a second terminal and a second RRU uplink in the case of establishing communication between the same time in the same frequency band F ₁ and a first receive antenna similar to the RRU, which is not detailed herein.

In addition, in the present application, when the first RRU supports the MIMO communication, in order to increase the utilization of the transmission resource, the transmission delay of the communication is further reduced. Further, after the BBU determines the first RRU, the third terminal and the third terminal are determined. The communication direction between the third terminal and the distributed base station and the communication direction between the first terminal and the distributed base station are opposite in the management range of the first RRU.

Specifically, when the first RRU includes N ₃ ×M ₃ antennas, where N ₃ is the number of the first RRU transmitting antennas, M ₃ is the number of the first RRU receiving antennas, and N ₃ and M ₃ are respectively greater than A positive integer of 1; the BBU controls communication between the first terminal and the first RRU, and between the third terminal and the first RRU in the same frequency band according to the following manner:

When the first terminal is in uplink communication with the first RRU and the third terminal is in downlink communication with the first RRU, the BBU controls uplink communication, the third terminal, and the first RRU between the first terminal and the first RRU. The downlink communication is performed on the same frequency band in the same time period. Specifically, the uplink communication between the first terminal and the first RRU is established through the F ₃ receiving antennas, and the third terminal and the first RRU are established through the G ₃ transmitting antennas. between the downlink communication, wherein, G ₃ respectively transmit antennas from receive antennas F ₃ N ₃ is not less than the distance of transmission antennas other than G ₃ transmit antennas and the transmission antennas other F ₃ receive antennas;

When the first terminal and the first RRU are in the downlink communication, and the third terminal is in the uplink communication with the first RRU, the BBU controls the downlink communication, the third terminal, and the first RRU between the first terminal and the first RRU. The uplink communication is performed on the same frequency band in the same time period, and the downlink communication between the first terminal and the first RRU is established through the F ₄ transmit antennas, and the third terminal and the first RRU are established through the G ₄ receive antennas. uplink communication, specifically, G ₄ receive antennas and transmit antennas from F ₄ is not less than M ₃ receiving antennas other than G ₄ receiving antennas and the other receive antenna distance F ₄ receiving antennas, respectively.

For example, it is assumed that the first RRU includes a transmitting antenna 1, a transmitting antenna 2, a transmitting antenna 3, a transmitting antenna 4, a receiving antenna 1, a receiving antenna 2, a receiving antenna 3, and a receiving antenna 4, wherein the geographical position of the transmitting antenna 1 is transmitted. The geographical position where the antenna 2 is located, the geographical position where the transmitting antenna 3 is located, the geographical position where the transmitting antenna 4 is located is the farthest from the geographical position where the receiving antenna 4 is located, and the receiving antenna 3, the receiving antenna 2, and the receiving antenna 1 are the second. When the first terminal and the first RRU are in uplink communication, and the third terminal is in downlink communication with the first RRU, if the BBU establishes communication between the first terminal and the first RRU through the receiving antenna 1 and the receiving antenna 2, If the BBU needs to establish communication between the third terminal and the first RRU through the two transmitting antennas, in order to reduce the interference between the third terminal and the first RRU and the communication between the first terminal and the first RRU, The BBU selects the receiving antenna 3 and the receiving antenna 4 to establish communication between the third terminal and the first RRU when all receiving antennas are in an idle state. When the BBU needs to establish communication between the third terminal and the first RRU, when the receiving antenna 3 is occupied by other terminals, if the receiving antenna 1, the receiving antenna 2, and the receiving antenna 4 are in an idle state, the receiving antenna 2 is selected and received. The antenna 4 establishes communication between the third terminal and the first RRU. The specific BBU determines that the communication between the terminal and the RRU is established by using several antennas, and then the determination is performed according to rules or algorithms set in the BBU. The rules or algorithms set in the BBU may be correspondingly set according to actual conditions.

When an uplink is a communication between the downlink communication, a first terminal and a third terminal between the first RRU and the first RRU, the BBU to establish communication between the first terminal and the first RRU through F ₄ transmission antennas, by G _four reception antennas establishing communication between the first RRU and the third terminal, and when the communication is a downlink communication between the uplink, the first terminal and the third terminal between the first RRU and the first RRU, the BBU by F ₃ receiving antennas establish communication between the first terminal and the first RRU, and the process of establishing communication between the third terminal and the first RRU through the G ₃ transmitting antennas is similar, and details are not described herein again.

It should be noted that, in the present application, the BBU controls the first terminal to communicate with the first RRU, the third terminal, and the first RRU in the same frequency band at the same time period, for example, the BBU may be the first terminal and the first RRU. The communication between the resources allocated to a certain frequency band in a certain period of time, and then the time allocated for the communication between the third terminal and the first RRU and the resource occupied by the communication between the first terminal and the first RRU The BBU can also allocate resources on the same frequency band for the same time period for the communication between the first terminal and the first RRU and the communication between the third terminal and the first RRU. .

Based on the same inventive concept, the present application further provides a baseband processing unit BBU and a distributed base station. Since the method corresponding to the BBU and the distributed base station is the method for communication of the present application, the implementation of the present application can refer to the method. Implementation, repetition will not be repeated.

As shown in FIG. 3, the baseband processing unit BBU of the present application includes: a processing module 300 and a control module 310. The processing module 300 is configured to: based on the first terminal identifier ID of the first terminal, based on the pre-stored terminal ID and at least one Corresponding relationship of the RRU, the first RRU is determined, the first RRU is corresponding to the first terminal ID, the first terminal is a terminal that needs to establish communication with the BBU through the first RRU, and after determining the second RRU, determining the second terminal; The second RRU is the RRU that is the farthest from the geographic location of the first RRU in the at least one RRU; the second terminal is the terminal within the second RRU management scope and needs to establish communication with the BBU through the second RRU; the second terminal and the second The communication direction between the RRUs is opposite to the communication direction between the first terminal and the first RRU; the control module 310 is configured to control the first time period between the first terminal and the first RRU, and between the second terminal and the second RRU Communication is performed in the same frequency band.

Optionally, the correspondence between the pre-stored terminal ID and the at least one RRU is that the processing module 300 stores the following manner:

For any terminal within the jurisdiction of the distributed base station, according to any terminal received by at least one RRU Demodulating the parameter signal DMRS or the channel sounding reference signal SRS, determining that the signal quality of the DMRS or the SRS is received by the at least one RRU, respectively, and determining the terminal of any terminal after receiving the RRU with the highest signal quality of the DMRS or the SRS in the at least one RRU. The correspondence between the ID and the RRU with the highest signal quality is stored.

Optionally, the signal quality of the at least one RRU receiving the DMRS or the SRS respectively is characterized by a reference signal received power RSRP or a signal to noise ratio SINR.

Optionally, if the first RRU and the second RRU support multiple input multiple output MIMO communication, the first RRU includes N ₁ ×M ₁ antennas, and the second RRU includes N ₂ ×M ₂ antennas, where N ₁ is The number of antennas of an RRU, M ₁ is the number of receiving antennas of the first RRU, N ₂ is the number of transmitting antennas of the second RRU, and M ₂ is the number of receiving antennas of the second RRU, N ₁ , M ₁ , N ₂ and M ₂ are each a positive integer greater than one;

The control module 310 controls the communication between the first terminal and the first RRU, and between the second terminal and the second RRU in the same frequency band in the same time period, specifically for uplink communication between the first terminal and the first RRU. When the second terminal and the second RRU are in downlink communication, control uplink communication between the first terminal and the first RRU, and perform downlink communication between the second terminal and the second RRU in the same frequency band in the same time period, where F ₁ receive antenna to establish an uplink communication between a first terminal and a first RRU, establishing the downlink communication between the second terminal and the RRU via a second transmission antenna G _{1, 0 <F 1 ≤M 1,} 0 <G ₁ ≤ N ₂ ; wherein the number of terminals establishing uplink communication with the first RRU is at least one, and the number of terminals establishing downlink communication with the second RRU is at least one; When the downlink communication is performed, when the second terminal and the second RRU are in uplink communication, the downlink communication between the first terminal and the first RRU is controlled, and the uplink communication between the second terminal and the second RRU is performed on the same frequency band in the same time period. wherein, by transmitting F ₂ days th Establishment RRU between the first terminal and the first downlink communication, establishing an uplink communication between the second terminal and a second RRU through G established _two receiving _{antennas, 0 <F 2 ≤N 1,} 0 <G 2 ≤M 2; The number of terminals that establish downlink communication with the first RRU is at least one, and the number of terminals that establish uplink communication with the second RRU is at least one.

Optionally, if the first RRU supports multiple input multiple output MIMO communication, the first RRU includes N ₃ ×M ₃ antennas, where N ₃ is the number of the first RRU transmitting antennas, and M ₃ is the first RRU receiving antenna. The number of N ₃ and M ₃ are positive integers greater than 1. The processing module 300 is further configured to determine a third terminal, where the third terminal is within the management range of the first RRU, and between the third terminal and the distributed base station. The communication direction is opposite to the communication direction between the first terminal and the distributed base station; the control module 310 is further configured to perform uplink communication between the first terminal and the first RRU, and downlink communication between the third terminal and the first RRU. And performing uplink communication between the first terminal and the first RRU, and performing downlink communication between the third terminal and the first RRU in the same frequency band in the same time period, wherein the first terminal and the first terminal are established by using F ₃ receiving antennas a communication between the RRU, establishing communication between the third terminal and the first RRU transmission antennas by G _3, G ₃ respectively transmit antennas from receive antennas F ₃ N ₃ is not less than the transmission antennas, in addition to G other than the _three transmission antennas transmit antennas respectively connected to _three F. a distance between the first terminal and the first RRU, and a downlink communication between the first terminal and the first RRU, and controlling the downlink communication between the first terminal and the first RRU and the third terminal uplink communication performed between the first RRU same frequency band at the same time, wherein establishing communication between the first terminal and the RRU via a first transmit antennas F _4, G ₄ established by the third terminal and the first reception antennas communication between the RRU, G ₄ receive antennas and transmit antennas from F ₄ is not less than M ₃ receiving antennas other than G ₄ receiving antennas and the other receive antenna distance F ₄ receiving antennas, respectively.

Optionally, the first terminal is a terminal that meets preset scheduling criteria.

It should be noted that in the present application, the processing module 300 can be implemented by a processor, and the control module 310 can be implemented by a controller, wherein the controller and the processor can be either one device or two devices. As shown in Figure 4, The BBU 400 can include a processor 410, a transceiver 420, a memory 430, and a controller 440. The memory 430 can be used to store the program/code pre-installed when the BBU 400 is shipped from the factory, and can also store code for the execution of the processor 410 and the controller 440, and the like.

The processor 410 and the controller 440 may be a general-purpose CPU (Central Processing Unit), a microprocessor, an ASIC (Application Specific Integrated Circuit), or one or more integrated circuits. Perform related operations to implement the technical solutions provided by the application.

It should be noted that although the BBU 400 shown in FIG. 4 only shows the processor 410, the transceiver 420, the memory 430, and the controller 440, in a specific implementation process, those skilled in the art should understand that the BBU 400 also includes a normal implementation. Other devices necessary for operation. At the same time, those skilled in the art will appreciate that the BBU 400 may also include hardware devices that implement other additional functions, depending on the particular needs. Moreover, those skilled in the art will appreciate that the BBU 400 may also include only the devices or modules necessary to implement the application without necessarily including all of the devices shown in FIG.

A person skilled in the art can understand that all or part of the process of implementing the above embodiment method can be completed by a computer program to instruct related hardware, and the above program can be stored in a computer readable storage medium. When executed, the flow of an embodiment of the methods as described above may be included. The storage medium may be a magnetic disk, an optical disk, a ROM (Read-Only Memory), or a RAM (Random Access Memory).

As shown in FIG. 5, the distributed base station 500 of the present application includes a baseband processing unit BBU 510 and at least one radio remote unit RRU 520 as shown in FIG. 3 of the present application.

It can be seen from the above that the method of communication in the present application is applied to a distributed base station, and the distributed base station includes a BBU and at least one RRU, wherein the BBU is based on the pre-stored terminal ID and at least according to the first terminal ID of the first terminal. Corresponding to an RRU, the first RRU is determined, the first RRU is corresponding to the first terminal ID, the first terminal is a terminal that needs to establish communication with the distributed base station by using the first RRU, and the BBU determines the second RRU, and the second RRU is at least The RRU in the RRU that is the farthest from the geographical location of the first RRU; the BBU determines the second terminal, the second terminal is in the second RRU management scope, and the terminal that needs to establish communication with the distributed base station through the second RRU, the second The communication direction between the terminal and the distributed base station is opposite to the communication direction between the first terminal and the distributed base station; the BBU controls the first time interval between the first terminal and the first RRU, and between the second terminal and the second RRU. Communication is performed in the same frequency band. The technical solution is that the communication between the first terminal and the first RRU has less interference to the communication between the second terminal and the second RRU because the first RRU is geographically distant from the second RRU, thereby The communication quality in the process of full-duplex communication is improved to some extent, and the measurement result is obtained by adding a new measurement step between the terminals in the prior art, and then determining the full-duplex communication according to the measurement result. The way of the terminal reduces the overhead of the terminal.

Those skilled in the art will appreciate that embodiments of the present invention can be provided as a method, system, or computer program product. Accordingly, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or a combination of software and hardware. Moreover, the invention 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 invention has been described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (system), and computer program products according to embodiments of the invention. It will be understood that each flow and/or block of the flowchart illustrations and/or FIG. These computers are available Program instructions to a processor of a general purpose computer, special purpose computer, embedded processor or other programmable data processing device to produce a machine such that instructions executed by a processor of a computer or other programmable data processing device are generated for implementation in a process A device or a plurality of processes and/or block diagrams of a device in a block or a plurality of blocks.

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.

While the preferred embodiment of the invention has been described, it will be understood that 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 modifications and variations to the invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and modifications of the invention

Claims (13)

1. A method for communication, characterized in that it is applied to a distributed base station, the distributed base station comprising a baseband processing unit BBU and at least one radio remote unit RRU, the method comprising:

   Determining, by the BBU, the first RRU according to the first terminal identifier ID of the first terminal, based on the correspondence between the pre-stored terminal ID and the at least one RRU, where the first RRU corresponds to the first terminal ID, The first terminal is a terminal that needs to establish communication with the distributed base station by using the first RRU;

   Determining, by the BBU, a second RRU, where the second RRU is the RRU that is the farthest from the geographic location of the first RRU in the at least one RRU;

   Determining, by the BBU, a second terminal, where the second terminal is a terminal in the second RRU management scope and needs to establish communication with the distributed base station by using the second RRU; wherein the second terminal is a communication direction between the distributed base stations and a communication direction between the first terminal and the distributed base station;

   The BBU controls communication between the first terminal and the first RRU, and between the second terminal and the second RRU in the same frequency band at the same time period.
2. The method according to claim 1, wherein the correspondence between the pre-stored terminal ID and the at least one RRU is that the BBU is stored in the following manner:

   Determining, by the BBU, the at least one of the demodulation parameter signal DMRS or the channel sounding reference signal SRS sent by the any terminal received by the at least one RRU, for any terminal in the jurisdiction of the distributed base station Receiving, by the RRU, signal quality of the DMRS or the SRS, respectively;

   Determining, by the BBU, an RRU that receives the DMRS or the SRS with the highest signal quality in the at least one RRU;

   The BBU stores a correspondence between a terminal ID of the any terminal and an RRU with the highest signal quality.
3. The method according to claim 2, wherein the signal quality of the at least one RRU receiving the DMRS or the SRS respectively is characterized by a reference signal received power RSRP or a signal to noise ratio SINR.
4. The method according to any one of claims 1 to 3, wherein if the first RRU and the second RRU support multiple input multiple output MIMO communication, the first RRU includes an antenna, and the second The RRU includes an antenna, where the number of the first RRU transmitting antennas is the number of the first RRU receiving antennas, and the number of the second RRU transmitting antennas is the second RRU receiving. The number of antennas is a positive integer greater than one;

   The BBU controls the communication between the first terminal and the first RRU, and the second terminal and the second RRU to communicate in the same frequency band at the same time, including:

   When the first terminal and the first RRU are in uplink communication, and the second terminal and the second RRU are in downlink communication, the BBU controls the first terminal and the first Uplink communication between the RRUs and downlink communication between the second terminal and the second RRU are performed on the same frequency band in the same time period, wherein the first terminal and the first RRU are established by using the receiving antennas In the uplink communication, the downlink communication between the second terminal and the second RRU is established by using a transmitting antenna; wherein the number of terminals establishing uplink communication with the first RRU is at least one, and The number of terminals in which the second RRU establishes downlink communication is at least one;

   When the first terminal and the first RRU are in downlink communication, and the second terminal and the second RRU are in uplink communication, the BBU controls the first terminal and the first Downlink communication between the RRUs and the And performing uplink communication between the second terminal and the second RRU on the same frequency band in the same time period, wherein establishing, by the sending antenna, establishing downlink communication between the first terminal and the first RRU, and adopting a receiving antenna Establishing an uplink communication between the second terminal and the second RRU, where the number of terminals that establish downlink communication with the first RRU is at least one, and the terminal that establishes uplink communication with the second RRU The number is at least one.
5. The method according to any one of claims 1 to 3, wherein if the first RRU supports multiple input multiple output MIMO communication, the first RRU includes antennas, wherein the first RRU transmission antenna The number of the first RRU receiving antennas is a positive integer greater than one; after the BBU determines the first RRU, the method further includes:

   Determining, by the BBU, a third terminal, where the third terminal is within a management range of the first RRU, and a communication direction between the third terminal and the distributed base station, and the first terminal and the The communication direction between distributed base stations is opposite;

   When the first terminal and the first RRU are in uplink communication, and the third terminal is in downlink communication with the first RRU, the BBU controls the first terminal and the first Uplink communication between the RRUs and downlink communication between the third terminal and the first RRU are performed on the same frequency band in the same time period, wherein the first terminal and the first RRU are established by using the receiving antennas In the uplink communication, the downlink communication between the third terminal and the first RRU is established by using a transmitting antenna, and the distance between the transmitting antennas and the receiving antennas is not less than the transmitting antennas. a distance between the other transmitting antennas other than the transmitting antennas and the receiving antennas;

   When the first terminal and the first RRU are in downlink communication, and the third terminal is in uplink communication with the first RRU, the BBU controls the first terminal and the first The downlink communication between the RRUs and the uplink communication between the third terminal and the first RRU are performed on the same frequency band in the same time period, wherein the first terminal and the first RRU are established by using one transmitting antenna. In the downlink communication, the uplink communication between the third terminal and the first RRU is established by using a receiving antenna, and the distance between the receiving antennas and the transmitting antennas is not less than the receiving antennas. The distances of the other receiving antennas other than the receiving antennas from the receiving antennas.
6. The method according to any one of claims 1 to 5, wherein the first terminal is a terminal that meets preset scheduling criteria.
7. A baseband processing unit BBU, comprising:

   a processing module, configured to determine, according to a first terminal identifier ID of the first terminal, a first RRU, where the first RRU corresponds to the first terminal ID, according to a correspondence between a pre-stored terminal ID and the at least one RRU The first terminal is a terminal that needs to establish communication with the BBU by using the first RRU; and after determining the second RRU, determining the second terminal; the second RRU is the at least one RRU The second RRU is located at the remote location of the RRU; the second terminal is a terminal within the second RRU management scope and needs to establish communication with the BBU through the second RRU; the second terminal a communication direction between the second RRU and a communication direction between the first terminal and the first RRU;

   And a control module, configured to control communication between the first terminal and the first RRU, and between the second terminal and the second RRU in the same frequency band at the same time period.
8. The BBU according to claim 7, wherein the correspondence between the pre-stored terminal ID and the at least one RRU is that the processing module is stored in the following manner:

   Determining, according to the at least one RRU, any of the terminals within the jurisdiction of the distributed base station Demodulating a parameter signal DMRS or a channel sounding reference signal SRS sent by a terminal, determining, by the at least one RRU, a signal quality of the DMRS or the SRS, respectively, and receiving the DMRS or determining the at least one RRU After the RRU with the highest signal quality of the SRS, the correspondence between the terminal ID of the any terminal and the RRU with the highest signal quality is stored.
9. The BBU according to claim 8, wherein the signal quality of the at least one RRU receiving the DMRS or the SRS, respectively, is characterized by a reference signal received power RSRP or a signal to noise ratio SINR.
10. The BBU according to any one of claims 7 to 9, wherein if the first RRU and the second RRU support multiple input multiple output MIMO communication, the first RRU includes an antenna, and the second The RRU includes an antenna, where the number of the first RRU transmitting antennas is the number of the first RRU receiving antennas, and the number of the second RRU transmitting antennas is the second RRU receiving. The number of antennas is a positive integer greater than one;

    The control module controls the communication between the first terminal and the first RRU, and between the second terminal and the second RRU in the same frequency band in the same time period, specifically for:

    Controlling between the first terminal and the first RRU when the first terminal is in uplink communication with the first RRU and the second terminal is in downlink communication with the second RRU Performing uplink communication and downlink communication between the second terminal and the second RRU in the same frequency band in the same time period, wherein an uplink between the first terminal and the first RRU is established by using a receiving antenna Communication, the downlink communication between the second terminal and the second RRU is established by using a transmitting antenna; wherein the number of terminals establishing uplink communication with the first RRU is at least one, and the second The number of terminals in which the RRU establishes downlink communication is at least one;

    Controlling between the first terminal and the first RRU when downlink communication is performed between the first terminal and the first RRU, and uplink communication is performed between the second terminal and the second RRU Performing downlink communication and performing uplink communication between the second terminal and the second RRU in the same frequency band in the same time period, wherein establishing a downlink between the first terminal and the first RRU is established by using a transmitting antenna Communicating, establishing, by the receiving antenna, establishing an uplink communication between the second terminal and the second RRU; wherein, the number of terminals establishing downlink communication with the first RRU is at least one, and the second The number of terminals in which the RRU establishes uplink communication is at least one.
11. The BBU according to any one of claims 7 to 9, wherein if the first RRU supports multiple input multiple output MIMO communication, the first RRU includes antennas, wherein the first RRU transmitting antenna The number of the first RRU receiving antennas is a positive integer greater than one; the processing module is further configured to:

    Determining a third terminal, the third terminal is within a management range of the first RRU, and a communication direction between the third terminal and the distributed base station, and the first terminal and the distributed base station The direction of communication between them is opposite;

    The control module is further configured to:

    Controlling between the first terminal and the first RRU when the first terminal is in uplink communication with the first RRU and the third terminal is in downlink communication with the first RRU Performing uplink communication, and performing downlink communication between the third terminal and the first RRU on the same frequency band in the same time period, wherein an uplink between the first terminal and the first RRU is established by using a receiving antenna Communication, establishing, by a transmitting antenna, downlink communication between the third terminal and the first RRU, where the distance between the transmitting antennas and the receiving antennas is not less than the number of the transmitting antennas The distance between the transmitting antennas other than the transmitting antenna and the receiving antennas respectively;

    Controlling between the first terminal and the first RRU when the first terminal is in downlink communication with the first RRU and the third terminal is in uplink communication with the first RRU Performing downlink communication and the third terminal Performing uplink communication with the first RRU on the same frequency band in the same time period, wherein downlink communication between the first terminal and the first RRU is established by using a transmitting antenna, and the Uplink communication between the third terminal and the first RRU, wherein the distance between the receiving antennas and the transmitting antennas is not less than the receiving antennas of the receiving antennas except the receiving antennas The distance of the receiving antenna.
12. The BBU according to any one of claims 7 to 11, wherein the first terminal is a terminal that meets preset scheduling criteria.
13. A distributed base station, comprising the baseband processing unit according to any one of claims 7 to 12, and at least one radio remote unit RRU.

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