CN108206726B - Data processing method, device and system for merged cell - Google Patents
Data processing method, device and system for merged cell Download PDFInfo
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- CN108206726B CN108206726B CN201611184508.7A CN201611184508A CN108206726B CN 108206726 B CN108206726 B CN 108206726B CN 201611184508 A CN201611184508 A CN 201611184508A CN 108206726 B CN108206726 B CN 108206726B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L1/00—Arrangements for detecting or preventing errors in the information received
- H04L1/004—Arrangements for detecting or preventing errors in the information received by using forward error control
- H04L1/0056—Systems characterized by the type of code used
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W28/00—Network traffic management; Network resource management
- H04W28/02—Traffic management, e.g. flow control or congestion control
- H04W28/06—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information
- H04W28/065—Optimizing the usage of the radio link, e.g. header compression, information sizing, discarding information using assembly or disassembly of packets
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04W—WIRELESS COMMUNICATION NETWORKS
- H04W72/00—Local resource management
- H04W72/20—Control channels or signalling for resource management
- H04W72/23—Control channels or signalling for resource management in the downlink direction of a wireless link, i.e. towards a terminal
Abstract
The invention discloses a data processing method, a device and a system for merging cells, which relate to the field of multi-cell merging in communication, wherein the method comprises the following steps: a centralized scheduler of the merging cell sends a scheduling instruction for demodulating air interface data to each active remote radio node RRH; the centralized scheduler receives a Cyclic Redundancy Check (CRC) result which is obtained and sent by each activated RRH demodulating the air interface data according to the scheduling instruction; and the centralized scheduler combines the user data which is obtained and sent by demodulating the air interface data of the corresponding activated RRH according to the received CRC result sent by each activated RRH. In a multi-cell combination scene, the embodiment of the invention realizes multi-cell combination in any scene, and reduces the performance reduction problem possibly caused by wrong judgment of the UE activation set while combining gains.
Description
Technical Field
The present invention relates to the field of multi-cell merging scenarios in communications, and in particular, to a method, an apparatus, and a system for processing data of a merging cell.
Background
In order to reduce the co-channel interference between cells and avoid frequent handover of terminals, an LTE (Long Term Evolution) network may use a multi-Cell merging manner, that is, original multiple co-channel Physical cells are merged into one logical Cell, and the merged Cell has the same information such as PCI (Physical Cell Identifier, Physical Cell ID) and the like.
The new logical cell is called a merging cell, and the original multiple physical cells are called Remote Radio Heads (RRHs) in a cell merging scenario. One optional original physical cell under the combination of the multiple cells is in charge of main scheduling work, is called a centralized scheduler, and has only one physical cell; the RRH responsible for demodulating data is referred to as an active RRH of a User Equipment (UE).
Currently, a method for implementing uplink Cyclic Redundancy Check (CRC) demodulation in a cell merging scenario is single RRH demodulation or multi-RRH soft information merging in a physical layer — soft information of multiple RRHs is sent to a specific RRH, and the specific RRH performs signal-to-noise ratio weighting and merging on the soft information to obtain a hierarchical gain, and meanwhile, a CRC error caused by a specific RRH selection error is avoided. However, this mechanism faces the following problems:
1) the single RRH demodulation cannot obtain the combining gain of multiple RRHs, and if the RRH selection is activated in error (not the RRH with the strongest signal transmitted by the UE is received), CRC error or demodulation performance can be reduced.
2) The interaction amount of soft information combination is large, the cost for transmitting the information is high, and when a plurality of RRHs carry out soft information combination, the bottom layer cannot support simultaneous transmission of a large amount of data.
3) The requirement for the real-time performance of soft information combination is very high, and the situation that combination cannot be performed often occurs due to the limitation of the number of physical cells.
4) When multiple cells cross frames, soft information cannot be combined due to the limitation of the existing transmission network delay and bandwidth.
5) Single RRH demodulation or soft information combination, the physical layer only outputs one CRC result to the centralized scheduler, the centralized scheduler cannot acquire the CRC result of each activated RRH, and the selection of the uplink activated RRH under the cell combination scene is not facilitated.
In view of the above problems, the present invention provides a data processing method and apparatus for merging cells, which are used as a supplement for multi-cell merging downlink and uplink single RRH demodulation and multi-RRH soft information merging, and improve a multi-cell merging support scenario.
Disclosure of Invention
According to the data processing method, device and system for the combined cell provided by the embodiment of the invention, under a multi-cell combining scene, the problems of no combining gain or limited supporting scene and the like existing in the existing uplink single RRH demodulation or multi-RRH soft information combination are solved.
The data processing method for merging cells provided by the embodiment of the invention comprises the following steps:
a centralized scheduler of the merging cell sends a scheduling instruction for demodulating air interface data to each activated RRH;
The centralized scheduler receives a Cyclic Redundancy Check (CRC) result which is obtained and sent by each activated RRH demodulating the air interface data according to the scheduling instruction;
and the centralized scheduler combines the user data which is obtained and sent by demodulating the air interface data of the corresponding activated RRH according to the received CRC result sent by each activated RRH.
Preferably, the sending of the scheduling instruction for demodulating air interface data to each activated RRH includes:
and the centralized scheduler selects activated RRHs for demodulating the air interface data from the merging cells according to the received signal strength of each RRH for receiving the air interface data.
Preferably, the sending, by the centralized scheduler of the merged cell, the scheduling instruction for demodulating air interface data to each activated RRH includes:
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 accessed to the merging cell;
and the centralized scheduler generates a scheduling instruction carrying the demodulation parameters and sends the scheduling instruction to each activated RRH used for demodulating the air interface data of the user terminal.
Preferably, the demodulating, by each activated RRH according to the scheduling instruction, the air interface data to obtain and send a CRC result includes:
Each activated RRH obtains a demodulation parameter for demodulating the air interface data of the user terminal from the received scheduling instruction;
and each activated RRH demodulates the air interface data of the user terminal by using the demodulation parameters to obtain a CRC result, and sends the CRC result to the centralized scheduler.
Preferably, the obtaining and sending user data by demodulating air interface data by the corresponding activated RRH includes:
and if the CRC result of the air interface data of the user terminal demodulated by the activated RRH 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, the combining, by the centralized scheduler according to the received CRC result sent by each activated RRH, the user data obtained and sent by the corresponding activated RRH through demodulating the air interface data includes:
the centralized scheduler combines the received CRC results sent by each activated RRH to obtain a final CRC result of the air interface data of the user terminal demodulated this time;
and 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 step of combining the CRC results sent by each activated RRH by the centralized scheduler to obtain a final CRC result of the air interface data of the current demodulation user terminal includes:
And if the correct CRC result exists in the CRC results sent by each activated RRH received by the centralized scheduler, determining that the final CRC result of the air interface data of the user terminal demodulated this time is correct CRC.
According to a storage medium provided by an embodiment of the present invention, a program for implementing the data processing method for merging cells is stored.
According to an embodiment of the present invention, a data processing apparatus for merging cells is provided, where the apparatus is configured in a centralized scheduler for merging cells, and includes:
the scheduling module is used for sending a scheduling instruction for demodulating air interface data to each activated RRH;
a receiving module, configured to receive a cyclic redundancy check CRC result that is obtained and sent by demodulating, by each activated RRH, the air interface data according to the scheduling instruction;
and the merging module is used for merging the user data which is obtained and sent by demodulating the air interface data of the corresponding activated RRH according to the received CRC result sent by each activated RRH.
Preferably, the combining module combines the received CRC result sent by each activated RRH to obtain a final CRC result of the air interface data demodulated this time, and selects a user data from the received user data according to the final CRC result.
According to an embodiment of the present invention, a data processing system for merging cells includes:
the centralized scheduler is used for sending a scheduling instruction for demodulating air interface data to each activated remote radio node RRH;
activating the RRH, demodulating the air interface data according to the scheduling instruction to obtain a CRC result and user data, and sending the CRC result and the user data to the centralized scheduler;
wherein the centralized scheduler combines all CRC results it receives and selects a copy of the user data it receives.
The technical scheme provided by the embodiment of the invention has the following beneficial effects:
the embodiment of the invention overcomes the problem that single RRH demodulation has no combination gain or RRH activation judgment errors in a multi-cell combination scene, solves the time and space limitations of soft information combination, realizes multi-cell combination in any scene, and reduces the performance reduction possibly caused by the judgment errors of a UE activation set while bringing the combination gain.
Drawings
Fig. 1 is a data processing block diagram of a merged cell according to an embodiment of the present invention;
fig. 2 is a block diagram of a data processing apparatus for merging cells according to an embodiment of the present invention;
fig. 3 is a block diagram of a data processing system incorporating cells according to an embodiment of the present invention;
Fig. 4 is a cooperation block diagram between modules of uplink selective combining in a multi-cell combining scenario according to an embodiment of the present invention;
fig. 5 is a schematic diagram of performing multi-cell combining when a UE is located in a multi-cell overlapping area according to an embodiment of the present invention;
fig. 6 is a flowchart of a multi-cell combining downlink and uplink selective combining according to an embodiment of the present invention.
Detailed Description
The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings, and it should be understood that the preferred embodiments described below are only for the purpose of illustrating and explaining the present invention, and are not to be construed as limiting the present invention.
Fig. 1 is a data processing block diagram of a merged cell according to an embodiment of the present invention, and as shown in fig. 1, the steps include:
step S101: and the centralized scheduler of the merging cell sends a scheduling instruction for demodulating air interface data to each activated RRH.
Before step S101, the centralized scheduler selects an activated RRH from the combining cell according to a combining gain maximization principle, so that the activated RRH demodulates air interface data of a user terminal that has accessed to the combining cell. That is to say, the centralized scheduler selects an activated RRH for demodulating the air interface data from the merging cell according to the received signal strength of each RRH for receiving the air interface data, for example, the centralized scheduler receives the received signal strength of the air interface data of the user terminal according to each RRH, and takes the RRH whose received signal strength is greater than the threshold as the activated RRH for demodulating the air interface data of the user terminal.
The step S101 includes: and 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 accessed to the merging cell, generates a scheduling instruction carrying the demodulation parameter, and sends the scheduling instruction to each activated RRH for demodulating the air interface data of the user terminal.
Step S102: and the centralized scheduler receives a Cyclic Redundancy Check (CRC) result which is obtained and sent by demodulating the air interface data by each activated RRH according to the scheduling instruction.
Specifically, each activated RRH obtains a demodulation parameter for demodulating the air interface data of the user terminal from the received scheduling instruction, demodulates the air interface data of the user terminal by using the demodulation parameter, obtains a CRC result, and sends the CRC result to the centralized scheduler.
And when the correct CRC result exists in the CRC results sent by each activated RRH received by the centralized scheduler, determining that the final CRC result of the air interface data of the user terminal demodulated this time is correct CRC.
Step S103: and the centralized scheduler combines the user data which is obtained and sent by demodulating the air interface data of the corresponding activated RRH according to the received CRC result sent by each activated RRH.
Specifically, for any activated RRH, if the CRC result obtained by demodulating the air interface data of the user terminal by the activated RRH is CRC correct, the user data obtained by demodulating the air interface data of the user terminal is sent to the centralized scheduler.
And for the centralized scheduler, combining the received CRC results sent by each activated RRH to obtain a final CRC result of the air interface data of the user terminal demodulated this time, specifically, if a correct CRC result exists in the received CRC results sent by each activated RRH, determining that the final CRC result of the air interface data of the user terminal demodulated this time is correct CRC. And then selecting a user data from the received user data of the terminal according to the final CRC result (namely, the CRC is correct).
The embodiment of the invention can selectively combine the uplink CRC as a supplement for multi-cell combined downlink and uplink single RRH demodulation and multi-RRH soft information combination, and can perfect the support scene of multi-cell combination.
It will be understood by those skilled in the art that all or part of the steps in the method according to the above embodiments may be implemented by a program, which may be stored in a computer-readable storage medium, and includes steps S101 to S104 when the program is executed. The storage medium may be ROM/RAM, magnetic disk, optical disk, etc.
Fig. 2 is a block diagram of a data processing apparatus for merging cells according to an embodiment of the present invention, as shown in fig. 2, the apparatus includes a scheduling module, a receiving module, and a merging module, and the apparatus is disposed in a centralized scheduler of a merging cell, and specifically disposed in a Baseband processing Unit (BBU) of a base station.
And the scheduling module is configured to send a scheduling instruction for demodulating air interface data to each activated RRH, where the scheduling instruction carries a demodulation parameter for demodulating air interface data of a user terminal that has accessed to a combining cell, and the demodulation parameter may be determined according to a service type or a data type of an uplink service of the user terminal and a channel that carries the service.
And the receiving module is used for receiving a Cyclic Redundancy Check (CRC) result which is obtained and sent by demodulating the air interface data by each activated RRH according to the scheduling instruction.
And the merging module is used for merging the user data which is obtained and sent by demodulating the air interface data of the corresponding activated RRH according to the received CRC result sent by each activated RRH. Specifically, the combining module combines the received CRC results sent by each activated RRH to obtain a final CRC result of the air interface data of the user terminal demodulated this time, and specifically, when a correct CRC result exists in the CRC results, it is determined that the final CRC result of the demodulation this time is correct CRC. And then selecting a user data from the received user data of the terminal according to the final CRC result.
Fig. 3 is a structure diagram of a merged cell data processing system according to an embodiment of the present invention, and as shown in fig. 3, a merged cell merged by a plurality of original co-frequency physical cells includes: and any one physical cell in the multiple same-frequency physical cells is taken as a centralized scheduler in charge of main scheduling work, and other physical cells in the multiple same-frequency physical cells are taken as UE (user equipment) in charge of data demodulation to activate RRH (remote radio head). Wherein, the Media Access Control (MAC) layer of the centralized scheduler implements the functions of the scheduling module of fig. 2, and the functions of receiving and combining the CRC result sent by each activated RRH; a Radio Network User Plane (RNLU) Layer of the centralized scheduler implements the functions of the receiving module and the combining module of fig. 2 to receive and select a CRC result correspondingly activated for RRH transmission.
And after the user terminal accesses the merging cell, the centralized scheduler sends a scheduling instruction for demodulating air interface data to each activated RRH. And activating the RRH to demodulate the air interface data according to the scheduling instruction to obtain a CRC result and user data, and sending the CRC result and the user data to the centralized scheduler. The centralized scheduler merges all CRC results it receives and selects a copy of the user data it receives.
In the embodiment of the invention, the step of combining the downlink and uplink selectively by multiple cells comprises the following steps:
the first step is as follows: the MAC layer notifies a Physical layer (PHY) to control a plurality of RRHs in the merging cell to simultaneously demodulate air interface data of the same UE, respectively.
Specifically, the MAC layer of the centralized scheduler sends scheduling information to the MAC layer of each UE-activated RRH, and the MAC layer of each UE-activated RRH obtains a demodulation parameter for demodulating the same UE according to the scheduling information and sends the demodulation parameter to the PHY layer of each UE, so that the PHY layer of each UE demodulates air interface data of the same UE according to the demodulation parameter.
The second step: and the PHYs of a plurality of RRHs under cell combination simultaneously and independently operate, the air interface data of the UE is analyzed, the CRC result is delivered to the MAC layer of each RRH, and the CRC is judged at the same time. And if the Data is correct, delivering the Protocol Data Unit (PDU) Data to the RNLU layer of each RRH without interaction and combination of a large amount of soft information Data.
Specifically, each UE activates the PHY layer of the RRH to demodulate air interface data of the same UE according to the demodulation parameters, obtain CRC results, and send the CRC results to respective MAC layers. Meanwhile, if the PHY layer of each UE activated RRH judges that the CRC result is correct, PDU data in air interface data is sent to each RNLU layer.
The third step: and the MAC layer delivers the CRC results reported by all the activated RRHs to a centralized scheduler of the merging cell through an internal interface/message receiving and sending mechanism, and the centralized scheduler merges all the CRC results to determine the final CRC result of the air interface data. The RNLU layer delivers all the received correct PDU data to the centralized scheduler through the internal interface/messaging mechanism, and the centralized scheduler selects one PDU data to deliver to the upper layer.
Specifically, the MAC layer of each UE-activated RRH sends the CRC result to the MAC layer of the centralized scheduler, and the MAC layers of the centralized scheduler combine the received CRC results from the MAC layers of each UE-activated RRH. Further, each UE activates the RNLU layer of the RRH to send all received correct PDU Data to the RNLU layer of the centralized scheduler, and the RNLU layer of the centralized scheduler selects a PDU Data to send to a Packet Data Convergence Protocol (PDCP) layer.
Fig. 4 is a cooperation block diagram between modules for uplink selective combining in a multi-cell combining scenario provided in the embodiment of the present invention, where each module is disposed in a BBU, and as shown in fig. 4, the cooperation block diagram specifically includes: PHY layer, MAC layer, and RNLU layer. The MAC layer comprises a MAC layer activation set judgment module and a MAC layer scheduling module which are arranged in a centralized scheduler, and a MAC layer demodulation control module and a MAC layer CRC receiving module which are arranged in each UE activation RRH. Wherein, the MAC layer scheduling module implements the function of the scheduling module of fig. 2, the MAC layer CRC receiving module implements the function of receiving and merging the CRC results of the receiving module and the merging module of fig. 2, and the RNLU layer implements the function of receiving and selecting the user data correspondingly activated to be sent by the RRH of the receiving module and the merging module of fig. 2.
The function and cooperation relationship of each module in the embodiment of the present invention are shown in fig. 4, and parameters and messages are mutually transmitted among the modules to complete the function of uplink selective combination.
1. MAC layer activation set decision module
And determining an activated RRH set which needs to be combined by a certain UE according to a combination gain maximization principle. Specifically, the active set (i.e., the active set) is determined according to the strength of the received signal of the UE received by each RRH, for example, if the strength of the received signal on a RRH is greater than a preset threshold, the RRH is regarded as the UE active RRH (hereinafter referred to as an active RRH).
2. MAC layer scheduling module
And the centralized scheduler is responsible for sending the scheduling result to the MAC layer of the corresponding RRH according to the activated RRH set of the UE.
3. MAC layer demodulation control module
The module mainly controls and activates RRH to generate demodulation parameters of a PHY layer, and comprises the following steps: physical Uplink Shared Channel (PUSCH) data demodulation, Uplink Control Information (UCI) demodulation, PUSCH measurement, Physical Uplink Control Channel (PUCCH) measurement, and the like.
After the processing is completed, each activated RRH transmits the corresponding demodulation parameter to the PHY layer, and meanwhile, the PHY layer of each activated RRH needs to be notified not to transmit the soft information.
It should be noted that, for the inactive RRH, only the measurement parameter is issued.
4. PHY layer
The demodulation and reporting of the measurement are carried out on all the RRHs;
demodulating and reporting the CRC result, and performing on all activated RRHs according to demodulation information;
and the PDU carried by the PUSCH is reported on all activated RRHs of the UE and the RRHs with correct CRC.
Meanwhile, a Downlink Control Information (DCI) loss flag of the PUSCH data is introduced, and is used to record whether the PUSCH data scheduled this time is lost due to channel quality or UE side reason. If the base station side performs PUSCH scheduling, but does not receive PUSCH data transmitted by the UE at a specified time point, the DCI information is considered to be lost.
The reporting principle is as follows: reporting DCI loss identification in CRC on all activated RRHs; and reporting the DCI loss identifier in the measurement on all RRHs.
In addition, the soft information sending and combining process is not processed according to the indication.
5. MAC layer CRC receiving module
And all the 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 identification.
6. Layer of RNLU
And after collecting the PDU information delivered by the RRH, the centralized scheduler screens the PDU information, and any PDU data is delivered to a higher layer, and only one PDU data is ensured to be delivered.
Fig. 5 is a schematic diagram of performing multi-cell combining when a UE is located in a multi-cell overlapping region according to the embodiment of the present invention, and as shown in fig. 5, the embodiment is mainly applied to a multi-cell combining scenario, and particularly has a significant effect on UEs located in respective RRH overlapping regions, multiple RRH critical points, or UEs moving between RRHs.
Fig. 6 is a flowchart of multi-cell combining downlink and uplink selective combining according to an embodiment of the present invention, and as shown in fig. 6, a scenario that may be applied in this embodiment is as follows: and the UE is accessed to the merging cell at a fixed point, is positioned in an overlapping area of the RRHs and carries out uplink service.
1. After the UE accesses the merging cell, the base station determines the current activation set of the UE according to the measurement of each RRH, namely the RRH which needs to be selectively merged.
2. And the base station generates demodulation parameters of each RRH needing to be combined according to the service type of the UE, PUSCH/PUCCH/measurement and the like, and each RRH recombines the demodulation parameters according to the activation state of the RRH to generate final demodulation parameters and sends the final demodulation parameters to the respective PHY layer.
3. The PHY layer of each RRH analyzes the air interface data of the UE according to the demodulation parameters of the PHY layer, and reports the CRC result, the DCI loss identification in the CRC and the like to the respective MAC layer; if the CRC is correct, the PDU data is reported to the respective RNLU layer.
4. And the MAC layer collects all reported CRC results and DCI loss identifications carried by the CRC in a centralized scheduler and combines the reported CRC results and the DCI loss identifications.
The merge strategy is: and if one of the CRC results is correct, the current CRC is considered to be correct, and if the DCI identification in all the CRC is lost, the current CRC result is considered to be DCI loss. The processing of other information is kept unchanged, and the RRHs do not need to transmit soft information, so that no special requirements are made on system hardware combination and processing time.
5. The RNLU layer checks the correct PDU data in the centralized scheduler, selects one part arbitrarily to deliver to the higher layer, and synchronizes with the above-mentioned merging step.
In this scenario, multiple RRHs analyze and combine the air interface data of the UE, which may bring a certain combining gain, and at this time, there is no limitation on processing time and hardware space under multi-cell combining.
The embodiment of the invention can also be applied in the following scenes: and the UE accesses the combined cell to perform uplink service, is positioned in a critical area of some RRHs and moves in the cell. The processing flow of selective combination in the scenario is similar to the application scenario, and the only difference is that in the application scenario, when the activation set determination is performed, the characteristic that the UE moves at multiple RRH critical points is considered, all RRHs near the critical points are all brought into the combination range, so that the accuracy of analyzing the UE air interface data is improved to the greatest extent, and meanwhile, the performance index degradation of the base station caused by unstable channel quality change in the UE moving process is avoided.
In an LTE network with multi-cell combination, if UE is located in an overlapping area of multiple cells or moves at a critical point of multiple cells, the conventional soft information combination has high requirements on system delay and hardware configuration, and single CP demodulates UE air interface data without gain and has risks of uplink desynchronization and UE drop caused by channel quality fluctuation. The embodiment of the invention is used as a supplement of the existing soft information combination and single CP demodulation, has no special requirements on system time delay and hardware configuration, can obtain the flow gain of the UE in an overlapping area, and avoids the performance index deterioration of the base station caused by the unstable channel quality of the UE moving at a multi-cell critical point.
In summary, the embodiments of the present invention have the following technical effects:
for a multi-cell merging networking scene, the embodiment of the invention, as a supplement to the prior art, solves the problem of no gain in single RRH demodulation, overcomes the limitations of soft information merging on time and space, and brings certain merging gain while preventing the network index from deteriorating.
Although the present invention has been described in detail hereinabove, the present invention is not limited thereto, and various modifications can be made by those skilled in the art in light of the principle of the present invention. Thus, modifications made in accordance with the principles of the present invention should be understood to fall within the scope of the invention.
Claims (8)
1. A data processing method for a merged cell comprises the following steps:
a centralized scheduler of the merging 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 a Cyclic Redundancy Check (CRC) result which is obtained and sent by each activated RRH demodulating the air interface data according to the scheduling instruction;
a radio network user plane (RNLU) layer of the centralized scheduler receives Protocol Data Unit (PDU) data which are obtained and sent from the air interface data by each activated RRH with a correct CRC result;
the MAC layer of the centralized scheduler combines the received CRC results to obtain a final CRC result of the air interface data demodulated at this time; meanwhile, the RNLU layer of the centralized scheduler optionally delivers a part of the received PDU data to a higher layer.
2. The method of claim 1, wherein the sending of the scheduling instruction for demodulating air interface data to each active RRH comprises:
and the centralized scheduler selects activated RRHs for demodulating the air interface data from the merging cells according to the received signal strength of each RRH for receiving the air interface data.
3. The method according to claim 1, wherein the MAC layer of the centralized scheduler merges the received CRC results to obtain a final CRC result of the air interface data demodulated this time; meanwhile, the optional delivery of the RNLU layer of the centralized scheduler from the received PDU data to the higher layer comprises the following steps:
If a correct CRC result exists in the CRC results sent by each activated RRH received by the MAC layer of the centralized scheduler, determining that the final CRC result of the air interface data of the user terminal demodulated at this time is correct CRC;
meanwhile, if the RNLU layer of the centralized scheduler receives PDU data sent by any one or more activated RRHs, one of the PDU data is optionally sent to a Packet Data Convergence Protocol (PDCP) layer.
4. The method of claim 1, wherein the sending, by the centralized scheduler of the combining cell, a scheduling instruction to each active RRH for demodulating the air interface data comprises:
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 accessed to the merging cell;
and the MAC layer of the centralized scheduler generates a scheduling instruction carrying the demodulation parameters and sends the scheduling instruction to the MAC layer of each activated RRH used for demodulating the air interface data of the user terminal.
5. The method of claim 4, wherein the demodulating, by each activated RRH according to the scheduling instruction, the air interface data to obtain and send a CRC result comprises:
each MAC layer of the activated RRH obtains a demodulation parameter for demodulating the air interface data of the user terminal from the received scheduling instruction and sends the demodulation parameter to a respective physical PHY layer;
The PHY layer of each activated RRH utilizes the demodulation parameters to demodulate the air interface data of the user terminal to obtain a CRC result;
the PHY layer of each activated RRH sends the obtained CRC result to the MAC layer of the activated RRH, and the MAC layer of each activated RRH sends the CRC result to the MAC layer of the centralized scheduler.
6. The method of claim 5, wherein the obtaining and sending Protocol Data Unit (PDU) data from the air interface data for each CRC result that correctly activates the RRH comprises:
the PHY layer of each activated RRH judges whether the obtained CRC result is correct, and if the obtained CRC result is correct, PDU data in the air interface data are delivered to respective RNLU layers;
the RNLU layer of the activated RRH 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 provided in a centralized scheduler for merging cells, comprising:
the scheduling module is used for sending a scheduling instruction for demodulating air interface data to each remote radio node RRH;
the receiving module is arranged on the MAC layer and used for receiving a Cyclic Redundancy Check (CRC) result which is obtained and sent by each activated RRH demodulating the air interface data according to the scheduling instruction; and the protocol data unit PDU data is arranged in the RNLU layer and used for receiving the protocol data unit PDU data which is obtained and sent from the air interface data by each activated RRH with the correct CRC result;
A combining module, arranged at the MAC layer, for combining the received CRC results to obtain a final CRC result of the air interface data demodulated this time; and the device is arranged in the RNLU layer, is synchronously performed with the combining step of the MAC layer and is used for optionally delivering one part of the received PDU data to a higher layer.
8. A data processing system of a merged cell, comprising:
a centralized scheduler for performing the data processing method of the merged cell according to any one of claims 1 to 4;
and activating the RRH, demodulating the air interface data according to the scheduling instruction to obtain a CRC result and user data, and respectively sending the CRC result and the user data to an MAC layer and an RNLU layer of the centralized scheduler.
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| CN103874137A (en) * | 2012-12-12 | 2014-06-18 | 普天信息技术研究院有限公司 | Reception method and system of uplink coordinated multiple points transmission (CoMP) |
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| CN103874137A (en) * | 2012-12-12 | 2014-06-18 | 普天信息技术研究院有限公司 | Reception method and system of uplink coordinated multiple points transmission (CoMP) |
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