CN108206726B - A data processing method, device and system for merging cells - Google Patents

Abstract

The invention discloses a data processing method, device and system for merging cells, and relates to the field of multi-cell merging in communication. The method includes: a centralized scheduler of the merging cells transmits to each activated remote radio node RRH for demodulating an air interface data scheduling instruction; the centralized scheduler receives the cyclic redundancy check CRC result obtained and sent by each activated RRH demodulating the air interface data according to the scheduling instruction; the centralized scheduler receives each The CRC result sent by the activated RRH is combined with the user data obtained and sent by the corresponding activated RRH by demodulating the air interface data. In the multi-cell combining scenario, the embodiment of the present invention realizes the multi-cell combining in any scenario, which not only brings combining gain, but also reduces the problem of performance degradation that may be caused by wrong UE activation set judgment.

Description

A data processing method, device and system for merging cells

technical field

The present invention relates to the field of multi-cell merging scenarios in communication, and in particular, to a data processing method, device and system for merging cells.

Background technique

In order to reduce intra-cell co-frequency interference and avoid frequent handovers of terminals, LTE (Long Term Evolution, Long Term Evolution) networks can adopt multi-cell merging, that is, merging multiple original co-frequency physical cells into one logical cell. The cells have the same information such as PCI (Physical Cell Identifier, physical cell ID).

The new logical cell is called a merged cell, and the original multiple physical cells are called a remote radio node (Remote Radio Head, RRH) in a cell merged scenario. Under multi-cell merging, an original physical cell is selected to be responsible for the main scheduling work, which is called a centralized scheduler, and there is only one RRH; the RRH responsible for demodulating data is called an activated RRH of a user equipment (UE).

At present, the implementation method of uplink Cyclic Redundancy Check (CRC) demodulation in the cell combination scenario is single RRH demodulation at the physical layer or soft information combination of multiple RRHs - sending the soft information of multiple RRHs to a specific RRH On the RRH of the specific RRH, the signal-to-noise ratio weighted combination of the soft information is performed by the specific RRH to obtain a hierarchical gain, and at the same time, the CRC error caused by the wrong selection of the specific RRH is avoided. However, this mechanism faces the following problems:

1) Single RRH demodulation cannot obtain the combined gain of multiple RRHs. If the wrong RRH is activated (not the RRH with the strongest signal transmitted by the UE), CRC errors or demodulation performance may be degraded.

2) The interaction volume of soft information merging is large, and the cost of transmitting the information is very high. When multiple RRHs perform soft information merging, the bottom layer cannot support the simultaneous transmission of a large amount of data.

3) The real-time requirements of soft information merging are very high, and due to the limitation of the number of physical cells, it often occurs that the merging cannot be performed.

4) When multiple cells cross frames, due to the limitation of the existing transmission network delay and bandwidth, soft information cannot be combined.

5) For single RRH demodulation or soft information combining, the physical layer only outputs one CRC result to the centralized scheduler, and the centralized scheduler cannot obtain the CRC results of each activated RRH, which is not conducive to the selection of uplink activated RRHs in the cell combining scenario.

In view of the above problems, the present invention provides a data processing method and device for combining cells, which is a supplement to uplink single RRH demodulation and multi-RRH soft information combining under multi-cell combining, and improves the support scenario of multi-cell combining.

SUMMARY OF THE INVENTION

According to a data processing method, device and system for merging cells provided by the embodiments of the present invention, in a multi-cell merging scenario, the existing uplink single RRH demodulation or multiple RRH soft information merging existing non-merging gain or support scenarios can be solved restrictions, etc.

A data processing method for merging cells provided according to an embodiment of the present invention includes:

The centralized scheduler of the merged cell sends a scheduling instruction for demodulating air interface data to each activated RRH;

receiving, by the centralized scheduler, a CRC result obtained by demodulating the air interface data according to the scheduling instruction and sent by each activated RRH;

According to the received CRC result sent by each activated RRH, the centralized scheduler combines the user data obtained and sent by the corresponding activated RRH by demodulating the air interface data.

Preferably, before the sending of the scheduling instruction for demodulating air interface data to each activated RRH includes:

The centralized scheduler selects an activated RRH for demodulating the air interface data from the combined cells according to the received signal strength of the air interface data received by each RRH.

Preferably, the centralized scheduler of the merged cell sends a scheduling instruction for demodulating air interface data to each activated RRH including:

The centralized scheduler determines a demodulation parameter for demodulating the air interface data of the user terminal according to the service type of the user terminal that has accessed the combined cell;

The centralized scheduler generates a scheduling instruction carrying the demodulation parameter, and sends it to each activated RRH for demodulating the air interface data of the user terminal.

Preferably, each activated RRH demodulates the air interface data according to the scheduling instruction to obtain and send a CRC result including:

Each activated RRH obtains the demodulation parameter used to demodulate the air interface data of the user terminal from the received scheduling instruction;

Each activated RRH demodulates the air interface data of the user terminal by using the demodulation parameter, obtains a CRC result, and sends the result to the centralized scheduler.

Preferably, the corresponding activated RRH obtains and transmits user data by demodulating air interface data, including:

If the CRC result obtained by the activated RRH demodulating the air interface data of the user terminal is correct, the activated RRH sends the user data obtained by demodulating the air interface data of the user terminal to the centralized scheduler.

Preferably, according to the received CRC result sent by each activated RRH, the centralized scheduler combines the user data obtained and sent by the corresponding activated RRH by demodulating the air interface data, including:

The centralized scheduler combines the received CRC results sent by each activated RRH to obtain the final CRC result of the air interface data of the user terminal demodulated this time;

The centralized scheduler selects a piece of user data from the received user data of the terminal according to the final CRC result.

Preferably, the centralized scheduler combines the received CRC results sent by each activated RRH, and the step of obtaining the final CRC result of demodulating the air interface data of the user terminal this time includes:

If there is a correct CRC result in the CRC result sent by each activated RRH received by the centralized scheduler, it is determined that the final CRC result of the air interface data of the user terminal demodulated this time is correct CRC.

According to the storage medium provided by the embodiment of the present invention, the storage medium stores a program for implementing the above data processing method for merging cells.

According to an embodiment of the present invention, a data processing apparatus for merging cells is provided, the apparatus is set in a centralized scheduler of the merging cells, and includes:

a scheduling module, configured to send a scheduling instruction for demodulating air interface data to each activated RRH;

a receiving module, configured to receive a cyclic redundancy check CRC result obtained and sent by each activated RRH demodulating the air interface data according to the scheduling instruction;

The combining module is configured to combine the user data obtained and sent by the corresponding active RRH by demodulating the air interface data according to the received CRC result sent by each active RRH.

Preferably, the combining module combines the received CRC results sent by each activated RRH to obtain the final CRC result of the demodulation of the air interface data this time, and according to the final CRC result, from the received user data Select a user profile.

A data processing system for merging cells provided according to an embodiment of the present invention includes:

a centralized scheduler, configured to send a scheduling instruction for demodulating air interface data to each activated remote radio node RRH;

activating the RRH, for demodulating the air interface data according to the scheduling instruction, obtaining a CRC result and user data, and sending them to the centralized scheduler;

Wherein, the centralized scheduler combines all the CRC results it has received, and selects a copy of the user data it has received.

The technical solutions provided by the embodiments of the present invention have the following beneficial effects:

In the multi-cell combining scenario, the embodiment of the present invention overcomes the problem of no combining gain in single RRH demodulation or the wrong judgment of activated RRH, solves the limitation of soft information combining in time and space, and realizes multi-cell in any scenario Combining brings combining gain and reduces the problem of performance degradation that may be caused by UE activation set judgment errors.

Description of drawings

1 is a data processing block diagram of a merged cell provided by an embodiment of the present invention;

FIG. 2 is a block diagram of a data processing apparatus for merging cells provided by an embodiment of the present invention;

3 is a structural diagram of a data processing system of a merged cell provided by an embodiment of the present invention;

4 is a block diagram of cooperation between modules for selective uplink combining in a multi-cell combining scenario provided by an embodiment of the present invention;

5 is a schematic diagram of performing multi-cell merging when a UE is located in an overlapping area of multiple cells according to an embodiment of the present invention;

FIG. 6 is a flowchart of uplink selective combining under multi-cell combining provided by an embodiment of the present invention.

Detailed ways

The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the preferred embodiments described below are only used to illustrate and explain the present invention, but not to limit the present invention.

Fig. 1 is a data processing block diagram of a merged cell provided by an embodiment of the present invention. As shown in Fig. 1, the steps include:

Step S101: The centralized scheduler of the merged cell sends a scheduling instruction for demodulating air interface data to each activated RRH.

Before step S101, the centralized scheduler selects the active RRH from the combined cell according to the principle of combining gain maximization, so that the active RRH demodulates the air interface data of the user terminals that have accessed the combined cell. That is, the centralized scheduler selects an activated RRH for demodulating the air interface data from the combined cell according to the received signal strength of the air interface data received by each RRH, for example, the centralized scheduler receives the RRHs according to each RRH The received signal strength of the air interface data of the user terminal, and the RRH whose received signal strength is greater than the threshold is used as the activated RRH for demodulating the air interface data of the user terminal.

Step S101 includes: the centralized scheduler determines a demodulation parameter for demodulating air interface data of the user terminal according to the service type of the user terminal that has accessed the combined cell, generates a scheduling instruction carrying the demodulation parameter, and sends to each active RRH for demodulating the user terminal's air interface data.

Step S102: The centralized scheduler receives and sends a CRC result obtained by demodulating the air interface data for each active RRH according to the scheduling instruction.

Specifically, each activated RRH obtains a demodulation parameter used to demodulate the air interface data of the user terminal from the received scheduling instruction, and uses the demodulation parameter to perform a process on the air interface data of the user terminal. After demodulation, the CRC result is obtained and sent to the centralized scheduler.

When there is a correct CRC result in the CRC result sent by each activated RRH received by the centralized scheduler, it is determined that the final CRC result of the air interface data of the user terminal demodulated this time is correct CRC.

Step S103: According to the received CRC result sent by each activated RRH, the centralized scheduler combines the user data obtained and sent by the corresponding activated RRH by demodulating the air interface data.

Specifically, for any one of the activated RRHs, if the CRC result of demodulating the air interface data of the user terminal is correct, the CRC will be sent to the centralized scheduler for demodulating the air interface data of the user terminal. obtained user data.

For the centralized scheduler, it combines the received CRC results sent by each activated RRH to obtain the final CRC result of demodulating the air interface data of the user terminal this time. If there is a correct CRC result in the CRC result, it is determined that the final CRC result of the demodulation of the air interface data of the user terminal this time is a correct CRC. Then, according to the final CRC result (that is, the CRC is correct), a piece of user data is selected from the received user data of the terminal.

The embodiments of the present invention can selectively combine uplink CRC, as a supplement to uplink single RRH demodulation and multi-RRH soft information combining under multi-cell combining, and can improve the support scenario of multi-cell combining.

Those of ordinary skill in the art can understand that all or part of the steps in the methods of the above embodiments can be completed by instructing relevant hardware through a program, and the program can be stored in a computer-readable storage medium, and the program can be executed when the program is executed. , including steps S101 to S104. Wherein, the storage medium may be ROM/RAM, magnetic disk, optical disk and the like.

Fig. 2 is a block diagram of a data processing apparatus for merging cells provided by an embodiment of the present invention. As shown in Fig. 2, it includes a scheduling module, a receiving module, and a merging module. The apparatus is arranged in the centralized scheduler of the merging cell, and is specifically arranged in the base station. In the baseband processing unit (Building Baseband Unit, BBU).

a scheduling module, configured to send a scheduling instruction for demodulating air interface data to each activated RRH, where the scheduling instruction carries demodulation parameters used for demodulating air interface data of user terminals that have accessed the combined cell, the demodulation The parameter may be determined according to the service type or data type of the uplink service of the user terminal and the channel carrying the service.

A receiving module, configured to receive a CRC result obtained by each activated RRH demodulating the air interface data according to the scheduling instruction and sent.

The combining module is configured to combine the user data obtained and sent by the corresponding active RRH by demodulating the air interface data according to the received CRC result sent by each active RRH. Specifically, the combining module combines the received CRC results sent by each activated RRH to obtain the final CRC result for demodulating the air interface data of the user terminal this time. Specifically, when there is a correct CRC result in the CRC result, It is determined that the final CRC result of this demodulation is correct CRC. Then, according to the final CRC result, a piece of user data is selected from the received user data of the terminal.

FIG. 3 is a structural diagram of a combined cell data processing system provided by an embodiment of the present invention. As shown in FIG. 3 , a combined cell formed by combining multiple original co-frequency physical cells includes: Any one of the physical cells is used as a centralized scheduler responsible for the main scheduling work, and other physical cells in the multiple intra-frequency physical cells are used as the UE responsible for demodulating data to activate the RRH. Wherein, the media access control (Media Access Control, MAC) layer of the centralized scheduler implements the function of the scheduling module in FIG. 2 and the function of receiving and merging the CRC results sent by each activated RRH; the wireless network user plane (Radio The Network Layer User Plane (RNLU) layer implements the function of receiving the receiving module and the combining module in FIG. 2 and selecting the CRC result sent by the corresponding activated RRH.

After the user terminal accesses the combined cell, the centralized scheduler sends a scheduling instruction for demodulating air interface data to each activated RRH. Activate the RRH to demodulate the air interface data according to the scheduling instruction, obtain the CRC result and user data, and send them to the centralized scheduler. The centralized scheduler combines all the CRC results it receives and selects a copy of the user data it receives.

In the embodiment of the present invention, the uplink selective combining step of the multi-cell combining includes:

The first step: the MAC layer notifies the physical layer (Physical, PHY) to control the multiple RRHs of the combined cell to demodulate the air interface data of the same UE simultaneously.

Specifically, the MAC layer of the centralized scheduler sends the scheduling information to the MAC layer of each UE-activated RRH, and the MAC layer of each UE-activated RRH obtains the demodulation parameters for demodulating the same UE according to the scheduling information, and sends them to the respective PHY layers, so that the respective PHY layers demodulate the air interface data of the same UE according to the demodulation parameters.

Step 2: PHYs of multiple RRHs run independently at the same time under cell merging, parse the air interface data of the UE, deliver the CRC results to the MAC layers of the respective RRHs, and perform CRC judgment at the same time. If it is correct, the protocol data unit (Protocol Data Unit, PDU) data is delivered to the RNLU layer of the respective RRH, and there is no need to exchange and combine a large amount of soft information data.

Specifically, the PHY layer of each UE activating the RRH demodulates the air interface data of the same UE according to the demodulation parameters, obtains the CRC result, and sends the result to the respective MAC layer. At the same time, if each UE activates the PHY layer of the RRH and judges that the CRC result is "correct", it sends the PDU data in the air interface data to the respective RNLU layer.

Step 3: The MAC layer delivers the CRC results reported by each activated RRH to the centralized scheduler of the merged cell through the internal interface/messaging mechanism, and the centralized scheduler combines all the CRC results to determine the final CRC result of the air interface data. The RNLU layer also delivers all the correct PDU data received to the centralized scheduler through the internal interface/message sending and receiving mechanism, and the centralized scheduler can choose a piece of PDU data and deliver it to the upper layer.

Specifically, the MAC layer of the RRH activated by each UE sends the CRC result to the MAC layer of the centralized scheduler, and the MAC layer of the centralized scheduler combines the CRC results received from the MAC layer of each UE activated RRH. Further, each UE activates the RNLU layer of the RRH and sends all correct PDU data received to the RNLU layer of the centralized scheduler, and selects a PDU data by the RNLU layer of the centralized scheduler, and sends it to the packet data convergence protocol ( Packet Data Convergence Protocol, PDCP) layer.

FIG. 4 is a block diagram of cooperation among modules for selective uplink combination in a multi-cell combination scenario provided by an embodiment of the present invention. Each module is set in the BBU, as shown in FIG. 4 , and specifically includes: a PHY layer, a MAC layer, and an RNLU Floor. The MAC layer includes a MAC layer activation set determination module and a MAC layer scheduling module set in the centralized scheduler, and a MAC layer demodulation control module and a MAC layer CRC receiving module set in each UE to activate the RRH. Wherein, the MAC layer scheduling module realizes the function of the scheduling module in FIG. 2, the MAC layer CRC receiving module realizes the function of receiving and merging the CRC results of the receiving module and the merging module in FIG. 2, and the RNLU layer realizes the receiving module and the merging module in FIG. 2. Select the corresponding function to activate the user data sent by the RRH.

The functions and cooperation relationship of each module in the embodiment of the present invention are shown in FIG. 4 , and each module transmits parameters and messages to each other to complete the function of selective uplink combining.

1. MAC layer activation set decision module

According to the principle of maximizing the combining gain, the activated RRH set that needs to be combined by a certain UE is determined. Specifically, an active set (ie, an active set) is determined according to the received signal strength of the UE received by each RRH. For example, if the received signal strength on a certain RRH is greater than a preset threshold, the RRH is used as the UE-activated RRH (hereinafter referred to as the RRH for short). activate RRH).

2. MAC layer scheduling module

The centralized scheduler is responsible for sending the scheduling result to the MAC layer of the corresponding RRH according to the active RRH set of the UE.

3. MAC layer demodulation control module

This module mainly controls the activation of RRH to generate demodulation parameters of the PHY layer, including: Physical Uplink Shared Channel (PUSCH) data demodulation, Uplink Control Information (UCI) demodulation, PUSCH measurement, physical uplink Physical Uplink Control Channel (PUCCH) measurement, etc.

After the processing is completed, each activated RRH transmits the corresponding demodulation parameters to the PHY layer, and at the same time, the PHY layer of each activated RRH needs to be notified not to send soft information.

It should be noted that, for an inactive RRH, only measurement parameters are issued.

4. PHY layer

Demodulation and reporting of measurements are performed at all RRHs;

The demodulation and reporting of the CRC result are performed on all activated RRHs according to the demodulation information;

The PDUs carried by the PUSCH are reported on all the active RRHs of the UE and the RRHs with correct CRC.

At the same time, a downlink control information (Downlink Control Information, DCI) loss flag of the PUSCH data is introduced to record whether the PUSCH data scheduled this time is lost due to channel quality or UE side reasons. If the base station side performs PUSCH scheduling, but does not receive the PUSCH data sent by the UE at the specified time point, it is considered that the current DCI information is lost.

The reporting principle is: the DCI loss flag in the CRC is reported on all activated RRHs; the DCI loss flag in the measurement is reported on all RRHs.

In addition, the soft information sending and merging flow is no longer processed according to the instruction.

5. MAC layer CRC receiving module

All activated RRHs of the UE deliver the received CRC results to the centralized scheduler, and the centralized scheduler combines all the CRC results and the carried DCI loss flag.

6. RNLU layer

After the centralized scheduler collects the PDU information delivered by the RRH, it performs screening and selects any PDU data for delivery to the upper layer. It must ensure that only one PDU data is delivered.

FIG. 5 is a schematic diagram of multi-cell merging when a UE is located in a multi-cell overlapping area according to an embodiment of the present invention. As shown in FIG. 5 , this embodiment is mainly applied to a multi-cell merging scenario, especially for a UE located in each RRH overlapping area. , UEs with multiple RRH critical points or UEs moving between RRHs have a significant effect.

FIG. 6 is a flowchart of selective uplink combination under multi-cell combination provided by an embodiment of the present invention. As shown in FIG. 6 , the applicable scenario of this embodiment is: UE accesses the combined cell at a fixed point, and is located in the overlap of multiple RRHs area for uplink services.

1. After the UE accesses the combined cell, the base station determines the current active set of the UE according to the measurement of each RRH, that is, the RRHs that need to be selectively combined.

2. The base station generates the demodulation parameters for each RRH that needs to be combined according to the service type of the UE, PUSCH/PUCCH/measurement, etc., and each RRH reorganizes the demodulation parameters according to its own activation state to generate the final demodulation parameters and send them to respective PHY layers.

3. The PHY layer of each RRH parses the air interface data of the UE according to its own demodulation parameters, and reports the CRC result, the DCI loss flag in the CRC, etc. to the respective MAC layer; if the CRC is correct, the PDU data is reported to the respective MAC layer. RNLU layer.

4. The MAC layer collects all the reported CRC results and the DCI loss identifier carried by the CRC at the centralized scheduler, and combines them.

The merging strategy is as follows: as long as one of all CRC results is correct, the CRC is considered to be correct, and only if the DCI identifiers in all CRCs are lost, this CRC result is considered to be DCI loss. The processing of other information remains unchanged, and there is no need to transmit soft information between RRHs. Therefore, there are no special requirements for system hardware combination and processing time.

5. The RNLU layer checks the correct PDU data in the centralized scheduler, and arbitrarily selects a copy to deliver to the upper layer, which is performed in synchronization with the above-mentioned merging step.

In this scenario, multiple RRHs parse and combine the air interface data of the UE, which can bring a certain combining gain, and there is no limit to the processing time and hardware space under the multi-cell combining at this time.

The embodiment of the present invention can also be applied to a scenario where the UE accesses a combined cell to perform uplink services, is located in a critical area of some RRHs, and moves within the cell at the same time. The processing flow of selective merging in this scenario is similar to the above application scenario, the only difference is that in this application scenario, when determining the active set, considering the characteristics of UE moving at multiple RRH critical points, all the All RRHs are included in the scope of consolidation, which improves the accuracy of UE air interface data analysis to the greatest extent possible, and also avoids the deterioration of base station performance indicators caused by unstable channel quality changes during UE movement.

In an LTE network where multiple cells are combined, if the UE is located in the overlapping area of multiple cells or moves at the critical point of multiple cells, the traditional soft information combining requires high system delay and hardware configuration, and a single CP demodulates the UE. Air interface data has no gain and there is a risk of uplink desynchronization and UE dropped calls caused by channel quality fluctuations. It is necessary to use the embodiment of the present invention as a supplement to the existing soft information combining and single-CP demodulation, and has no special requirements for system delay and hardware configuration. The UE's performance index of the base station is deteriorated due to unstable channel quality caused by the UE moving at the critical point of the cell.

To sum up, the embodiments of the present invention have the following technical effects:

For the multi-cell combined networking scenario, as a supplement to the prior art, the embodiment of the present invention solves the problem of no gain in single RRH demodulation, overcomes the limitations of soft information combining in time and space, and prevents network indicators from deteriorating at the same time. Bring a certain combined gain.

Although the present invention has been described in detail above, the present invention is not limited thereto, and various modifications can be made by those skilled in the art in accordance with the principles of the present invention. Therefore, all modifications made in accordance with the principles of the present invention should be understood as falling within the protection scope of the present invention.

Claims (8)

1. A data processing method for merging cells, comprising: The centralized scheduler of the merged cell sends a scheduling instruction for demodulating air interface data to each activated remote radio node RRH; The media access control MAC layer of the centralized scheduler receives and sends the CRC result obtained by each activated RRH demodulating the air interface data according to the scheduling instruction; The radio network user plane RNLU layer of the centralized scheduler receives the protocol data unit PDU data obtained and sent from the air interface data by the active RRH whose CRC result is correct; The MAC layer of the centralized scheduler combines the received CRC results to obtain the final CRC result of demodulating the air interface data this time; meanwhile, the RNLU layer of the centralized scheduler selects one of the received PDU data. to be delivered to the top. 2. The method according to claim 1, before the sending the scheduling instruction for demodulating air interface data to each activated RRH comprises: The centralized scheduler selects an activated RRH for demodulating the air interface data from the combined cells according to the received signal strength of the air interface data received by each RRH. 3. The method according to claim 1, the MAC layer of the centralized scheduler combines the received CRC results to obtain the final CRC result of demodulating the air interface data this time; Meanwhile, the RNLU of the centralized scheduler The layer selects one of the received PDU data to deliver to the upper layer, including: If there is a correct CRC result in the CRC result sent by each activated RRH received by the MAC layer of the centralized scheduler, it is determined that the final CRC result of the demodulation of the air interface data of the user terminal this time is correct CRC; At the same time, if the RNLU layer of the centralized scheduler receives any one or more PDU data sent by the activated RRH, it selects one of the PDU data and sends it to the PDCP layer of the Packet Data Convergence Protocol. 4. The method according to claim 1, wherein the centralized scheduler of the combined cell sends a scheduling instruction for demodulating the air interface data to each activated RRH, comprising: The MAC layer of the centralized scheduler determines a demodulation parameter for demodulating the air interface data of the user terminal according to the service type of the user terminal that has accessed the combined cell; The MAC layer of the centralized scheduler generates a scheduling instruction carrying the demodulation parameter, and sends it to the MAC layer of each activated RRH for demodulating the air interface data of the user terminal. 5. The method according to claim 4, wherein each activated RRH demodulates the air interface data according to the scheduling instruction to obtain and send a CRC result comprising: Each RRH-activated MAC layer obtains the demodulation parameters used to demodulate the air interface data of the user terminal from the received scheduling instruction, and sends them to the respective physical PHY layers; Each PHY layer that activates the RRH uses the demodulation parameter to demodulate the air interface data of the user terminal to obtain a CRC result; Each PHY layer that activates the RRH sends the obtained CRC result to the respective MAC layer, and each MAC layer that activates the RRH sends the respective CRC result to the MAC layer of the centralized scheduler. 6. The method according to claim 5, the protocol data unit PDU data that each CRC result is that the correct activation RRH obtains and sends from the air interface data comprises: Each PHY layer that activates the RRH judges whether the obtained CRC result is correct, and if it is correct, delivers the PDU data in the air interface data to the respective RNLU layer; The RRH-activated RNLU layer that receives the PDU data sends the PDU data to the RNLU layer of the centralized scheduler. 7. A data processing apparatus for merging cells, the apparatus being set in a centralized scheduler of the merging cells, comprising: a scheduling module, configured to send a scheduling instruction for demodulating air interface data to each activated remote radio node RRH; The receiving module is arranged at the MAC layer, and is used for receiving the cyclic redundancy check CRC result obtained and sent by each activated RRH demodulating the air interface data according to the scheduling instruction; and, being arranged at the RNLU layer, for receiving each Each CRC result is the protocol data unit PDU data obtained and sent by the correct activated RRH from the air interface data; The merging module is arranged at the MAC layer, and is used for merging the received CRC results to obtain the final CRC result of the demodulation of the air interface data this time; It is used to deliver any one of the received PDU data to the upper layer. 8. A data processing system for merging cells, comprising: a centralized scheduler, configured to execute the data processing method for merging cells according to any one of claims 1-4; Activating the RRH is used to demodulate the air interface data according to the scheduling instruction to obtain the CRC result and user data, which are respectively sent to the MAC layer and the RNLU layer of the centralized scheduler.

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