CN113329443A - Baseband data merging method - Google Patents
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- H—ELECTRICITY
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- 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
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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
- H04W88/00—Devices specially adapted for wireless communication networks, e.g. terminals, base stations or access point devices
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Abstract
The embodiment of the application provides a baseband data merging method, wherein a baseband extension device not only comprises an uplink port and a plurality of downlink ports, but also comprises a data control unit, a plurality of data storage units, a message header cache unit and a data synthesis unit, each downlink port corresponds to one data storage unit, the data control unit comprises a data writing unit and a data reading unit, receiving the uploaded data message through a downlink port, splitting the uploaded data message into a message header and message data content through a data writing unit, storing the message header in a message header cache unit, storing the message data content in a corresponding data storage unit, and the data reading unit transmits the message data content stored in the corresponding data storage unit to the data merging unit according to the received data merging control instruction to merge data and report the merged data through the uplink port. According to the method and the device, message data with larger bandwidth can be uploaded without adding extra equipment, and the equipment requirements are met.
Description
Technical Field
The present application relates to the field of communications devices, and in particular, to a baseband data merging method.
Background
The mobile communication system gradually evolves from an integrated base station to an extended base station, and wireless signal transmission is carried on the basis of optical fibers or network cables. The extended base station is composed of a baseband device, a baseband extension device and a radio remote device. The baseband extension equipment receives downlink baseband data sent by the host, transmits the downlink baseband data to the remote radio remote equipment after shunt processing, sends uplink baseband data of the remote radio remote equipment to the host unit after certain combination processing, and realizes communication with the host unit. The baseband extension device generally includes an uplink port, a downlink port, and a cascade port, where the cascade port is connected to the baseband extension device of the next stage, and transmits the data packet uploaded by the next stage to the baseband extension device of the current stage. The downlink port is connected with the radio remote equipment to transmit baseband data, and the uplink port is connected with the upper-stage baseband extension equipment or baseband equipment to transmit the received baseband data to the upper stage.
As known to the inventor, one radio remote device generally independently supports baseband data transmission of one cell, but in some cases, in order to extend signal coverage, especially in indoor complex environments, multiple radio remote devices are often required to support the radio remote device. Since the baseband data transmitted by each remote radio device is large and requires a large bandwidth, usually, one baseband device needs to configure a plurality of remote radio devices, such as 16 or 32 remote radio devices, but due to the limitations of the capacity of the remote radio devices and the connection interface, the requirement of only 5 remote radio devices is often satisfied.
Disclosure of Invention
In order to overcome the problems in the related art, the present application provides a baseband data merging method, which is applied to a baseband expansion device, the baseband expansion device includes an uplink port and a plurality of downlink ports, the baseband expansion device further includes a data control unit, a plurality of data storage units, a header buffer unit and a data synthesis unit, each downlink port corresponds to one data storage unit, the data control unit includes a data writing unit and a data reading unit, receiving the uploaded data message through the corresponding downlink port, and splitting the uploaded data message into a message header and message data content through a data writing unit, wherein the message header is stored in a message header cache unit, the message data content is stored in a corresponding data storage unit, and the data reading unit transmits the message data content stored in the corresponding data storage unit to the data merging unit according to the received data merging control instruction to merge data and report the merged data through the uplink port. According to the data required to be combined in the data combination control instruction, the message data contents in the corresponding data storage units are combined and uploaded, the message data with larger bandwidth can be uploaded without adding extra radio remote equipment, the equipment requirements are met, and the problem that a plurality of radio remote equipment cannot be supported in a cell is solved.
Preferably, the data control unit further includes a configuration issuing state machine and an output control state machine, the configuration issuing state machine controls the write-in unit in an associated manner, and the output control state machine controls the read-out unit in an associated manner. The configuration issuing state machine acquires the state of the message data content of the data storage unit, judges whether the uploaded messages needing to be combined meet the requirement of being capable of being combined according to the state of the message data content, if the uploaded messages meet the requirement, sends the state information of the corresponding data storage unit and the corresponding message header information to the output control state machine, the output control state machine judges whether the acquired message data content of the data storage unit meeting the requirement completely arrives, and sends the arrived message data content to a subsequent data combining unit.
Preferably, the reported data message is placed in the time delay storage unit before being split by the data writing unit. Therefore, the message data to be merged can be merged at the same time.
Preferably, the reported data message is put into the time delay storage unit and then put into the decompression unit. If the uploaded data message is not the original data, the data message needs to be decompressed first to avoid distortion when the data is combined.
Preferably, the data reading unit is connected to the gain adjusting unit, and the corresponding message data contents are output to the data merging unit after the gains of the message data contents are adjusted to be consistent by the gain adjusting unit. In practical use, because the gains of each downlink radio remote unit are not necessarily the same, if the uploaded data messages are combined, the signal-to-noise ratio is affected, which affects the practical performance, and therefore, the gains of the message data contents to be combined need to be adjusted to be consistent through the gain adjustment unit before the message data contents are to be combined.
Preferably, the output of the data merging unit is connected with the data compression unit. If the higher baseband expansion device or the baseband device needs to compress the data message, the merged data message needs to be compressed before uploading, and the transmission bandwidth can be reduced after compression.
Further, the packet header output by the packet header caching unit and the combined packet data content output by the data combining unit form a new data packet, and the new data packet is uploaded to the upper-level baseband expansion device or the baseband device through the uplink port. And randomly selecting one associated message header from the message header cache unit as the message header of the new data message, and forming the new data message by the message header and the combined message data.
Preferably, the system further comprises a cascade port, and the cascade port is connected with the baseband expansion device at the next stage. And uploading the data message uploaded by the baseband expansion equipment of the next stage to the baseband expansion equipment of the current stage.
Preferably, the downlink port is connected to the remote radio unit, and the uploaded data message is uploaded by the remote radio unit through the downlink port.
The technical scheme provided by the embodiment of the application can have the following beneficial effects:
according to the embodiment of the application, the message data contents in the corresponding data storage units are merged and uploaded according to the data merging control instruction, the message data with larger bandwidth can be uploaded without adding extra radio remote equipment, the equipment requirements are met, and the problem that a plurality of radio remote equipment cannot be supported in a cell is solved.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments consistent with the present application and together with the application, serve to explain the principles of the application.
Fig. 1 is a schematic diagram of an extended base station architecture according to an embodiment of the present application;
FIG. 2 is a logic block diagram of a method according to an embodiment of the present application;
FIG. 3 is a schematic diagram illustrating a writing/reading and storing manner of message data content according to an embodiment of the present application;
FIG. 4 is a state transition diagram of a configuration issue state machine according to an embodiment of the present application;
FIG. 5 is a state transition diagram of an output control state machine according to an embodiment of the present application;
fig. 6 is a schematic diagram of a delay buffer unit according to an embodiment of the present application;
FIG. 7 is a schematic diagram of a gain adjustment unit according to an embodiment of the present application;
fig. 8 is a schematic diagram of a data merging unit according to an embodiment of the present application.
Detailed Description
Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present application, as detailed in the appended claims.
The embodiment of the application provides a baseband data merging method, which is applied to an extended base station consisting of baseband equipment, baseband extension equipment and radio remote equipment. The baseband extension equipment comprises an uplink port, a plurality of downlink ports and a cascade port. The uplink port is used to connect the baseband device or the upper baseband extension device, each downlink port is correspondingly connected to a radio remote device, and the cascade port is used to connect the lower baseband extension device, as shown in fig. 1.
The baseband extension device in the embodiment of the present application further includes a data control unit, a plurality of data storage units, a header buffer unit, and a data synthesis unit. Each downstream port is connected to a data storage unit. The data control unit comprises a data writing unit, a data reading unit, a configuration issuing state machine and an output control state machine. The uploaded data message is divided into a message header and message data content through the data writing unit, wherein the message header is stored in the message header cache unit, and the message data content is stored in the corresponding data storage unit. And configuring a sending state machine to acquire the state of the message data content of the storage unit, and judging whether the uploaded message meets the requirement of being capable of being combined or not according to the state of the message data content. And if the data storage units meet the requirements, sending the state information of the corresponding data storage units and the corresponding message header information to an output control state machine, judging whether all the acquired message data contents of the data storage units meeting the requirements arrive by the output control state machine, and sending the arrived message data contents to a subsequent data merging unit. The state of the method mainly comprises the steps that whether a data storage unit where uploaded message data content is located and the message data content to be combined by a data combination control instruction are in the same data storage unit is judged; secondly, in order to ensure that the merging arrives as soon as possible at the same time, the rate of the uploaded message data content needs to be detected; in order to avoid that the length of the message data content merged data can cause one data message to have more data messages, the length of the data message needs to be detected; and finally, judging whether the symbols of each uploaded data message are consistent. It should be noted that, the above-mentioned several judgment and detection steps are all required to be satisfied, but at least it is determined whether the data storage unit where the uploaded message data content is located and the message data content to be combined by the data combination control instruction are in the same data storage unit. And the output control state machine judges whether the acquired message data contents of the data storage unit meeting the requirements all arrive or not, and sends the arrived message data contents to a subsequent data merging unit. The corresponding header herein refers to any header of any one of the upload data packets that needs to be merged. The combined message data content output by the arbitrary associated message header and the data combining unit output by the message header caching unit forms a new data message, and the new data message is uploaded to the baseband expansion device or the baseband device at the upper stage through the uplink port, in combination with fig. 2 to 3
Specifically, the states of the configuration issue state machine and the output control state machine are as follows.
Configuring a sending state machine: including an idle state, a rate detection state, a symbol detection state, a configuration refresh state, and a monitor state, as shown in fig. 4. Wherein,
an idle state: and in the initial state, after the configuration is detected to be issued in the initial state, jumping to a rate detection state.
Rate detection state: detecting whether the message data content corresponding to the configuration is combined with the same data storage unit required by the data combination control instruction or not in the state; reporting whether the rate and the length of the data message are the same; if the symbol detection state is equal to the symbol detection state, jumping to a symbol detection state, and if the symbol detection state is not equal to the symbol detection state, detecting all the time; and if the configuration is changed, returning to the idle state.
Symbol detection state: only the message data contents with the same symbol can be merged, so that whether the symbols of the message data contents corresponding to the configuration are equal or not is detected in the present state. If the values are equal, jumping to a configuration refreshing state; if not, detecting all the time; if the rate detection result fails, returning to a rate detection state; and if the configuration is changed, returning to the idle state.
Configuring a refresh state: and issuing the configuration to an output state machine in the state. If the configuration is changed at the moment, returning to the idle state again; and after the successful delivery, skipping to a monitoring state.
Monitoring the state: in this state, the speed, length and symbol of the data content of the message are continuously monitored, and if the configuration is changed, the state returns to the idle state; if the rate monitoring fails, returning to a rate monitoring state; if the symbol monitoring fails, returning to the symbol monitoring state; if the monitoring is normal, the current state is continuously maintained.
The output control state machine includes an idle state, a configuration issuing state, a data valid state, an output header state, and an output message data content state, as shown in fig. 5. Wherein,
an idle state: and in the initial state, after the configuration is detected to be issued in the initial state, jumping to the configuration issuing state.
Configuring a sending state: and waiting for the configuration sending state machine to send the configuration in the state, and monitoring the state of the message data content in the state. If the configuration is cleared, returning to an idle state; if configuration is issued, the state is normal, and the data is jumped to the effective state; if the monitoring fails, the state is maintained.
Data valid state: this state mainly monitors whether all the message data contents to be merged arrive. Because the arrival sequence of the data contents of each path of message is sequential and arrives at intervals, whether the coincidence sum data is valid or not needs to be detected before each path of combination.
Output head state: and outputting the message header corresponding to the merging operation in the state to be used by a subsequent module. And after the output is finished, skipping to the state of outputting the data content of the message.
Outputting the message data content state: and outputting the message data content corresponding to the merging operation in the state to a subsequent module for use. And after the output is finished, jumping to a configuration issuing state and continuing the next round of output.
As another embodiment of the present application, the time-delay storage unit is put in before the reported data packet is split by the data writing unit, so that the data packet can be guaranteed to reach the data writing unit at the same time, thereby completing the splitting and merging. By way of example, but not limitation, the latency storage unit may be implemented as follows. As shown in fig. 6, the delay storage unit records the time of uploading the data packet by each radio remote unit, then stores the data packet in the buffer FIFO, and configures the delay time so that the data packets output by each radio remote unit are output at the same time. In this embodiment, the lower limit of the configuration delay is zero, and the maximum value may be dynamically adjusted and set according to the depth of the buffer FIFO, specifically considering whether there is a device in the upstream and downstream in the actual application scene, and how far the device is in the transmission distance.
Because the reported data message may be original data or compressed data, if the data is compressed data, the data message needs to be decompressed by the data compression unit before reaching the write-in unit, so as to avoid distortion of the data message in the subsequent merging process.
In another embodiment of the present application, the output port of the data reading unit is connected to a gain adjusting unit, and the output of the gain adjusting unit is connected to the input of the data merging unit. In practical use, because the gains of each downlink radio remote unit are not necessarily the same, if the uploaded data messages are combined, the signal-to-noise ratio is affected, which affects the practical performance, and therefore, the gains of the message data contents to be combined need to be adjusted to be consistent through the gain adjustment unit before the message data contents are to be combined. An example of this is shown in fig. 7. The gain adjusting unit comprises a multiplier and a truncation bit, and the gain factor of the multiplier is obtained according to the influence factors.
The data merging unit in the embodiment of the application is mainly realized through sign addition, the data content of 8 paths of messages is split into 4 paths, and each two paths of messages are added and are registered through a register. After addition, the signals are multiplied by the combining factor to amplify and reduce the signals, and since the addition and multiplication broaden the number of data bits, truncation is finally performed, and the bit width of the original data is maintained and then output, which is specifically shown in fig. 8.
If the upper baseband expansion device or the baseband device needs to compress the data message, the merged data message needs to be compressed before uploading, the data merging unit needs to be connected with the data compression unit in output, and the transmission bandwidth can be reduced after the data message is compressed.
As another embodiment of the present application, if a data packet of a next stage needs to be uploaded, the next stage of baseband expansion device needs to be connected through a cascade interface of the current stage of baseband expansion device. In theory, the present application can support an infinite number of radio remote devices, but generally, the number of downlink ports of the baseband extension device is 8, and the general baseband extension device performs 4-stage cascade at most, and supports the combination of 32 radio remote devices in total.
The baseband data combining method in the embodiment of the present application may implement the functions of the respective unit modules by, for example, a xilinx FPGA KU11P chip. Of course, the chip mentioned here is only an example of an actual use environment, and does not limit the specific implementation environment of the present application.
All the above-mentioned embodiments refer to the directional terms such as upper, lower, left, right, front, rear, horizontal, vertical, left, right, etc., and the directional terms are used in the drawings.
It will be understood that the present application is not limited to the precise arrangements described above and shown in the drawings and that various modifications and changes may be made without departing from the scope thereof. The scope of the application is limited only by the appended claims.
The present invention is not intended to be limited to the particular embodiments shown and described, but is to be accorded the widest scope consistent with the principles and novel features herein disclosed.
Claims (9)
1. A baseband data merging method is applied to baseband extension equipment, the baseband extension equipment comprises an uplink port and a plurality of downlink ports, and the baseband extension equipment is characterized by further comprising a data control unit, a plurality of data storage units, a message header cache unit and a data synthesis unit, each downlink port corresponds to one data storage unit, the data control unit comprises a data writing-in unit and a data reading-out unit, the data control unit receives an uploaded data message through the corresponding downlink port and splits the uploaded data message into a message header and message data contents through the data writing-in unit, the message header is stored in the message header cache unit, the message data contents are stored in the corresponding data storage unit, the data reading-out unit transmits the message data contents stored in the corresponding data storage unit to the data merging unit according to a received data merging control instruction to perform data merging, and the data merging is performed through the uplink port and the downlink port And reporting by a line port.
2. The method of claim 1, wherein the data control unit further comprises a configuration issuing state machine and an output control state machine, the configuration issuing state machine is associated with the control write unit, and the output control state machine is associated with the control read unit.
3. The baseband data combining method according to claim 1, wherein the reported data packet is placed in a delay storage unit before being split by a data writing unit.
4. The baseband data combining method according to claim 3, wherein the reported data packet is placed in a decompression unit after being placed in the delay storage unit.
5. The baseband data combining method according to claim 1, wherein the data reading unit is connected to a gain adjusting unit, and the corresponding message data contents are output to the data combining unit after the gains of the message data contents are adjusted to be consistent by the gain adjusting unit.
6. The baseband data combining method of claim, wherein an output of said data combining unit is connected to said data compressing unit.
7. The baseband data merging method according to claim 1, wherein a packet header output by the packet header buffer unit and the merged packet data content output by the data merging unit form a new data packet, and the new data packet is uploaded to a previous baseband expansion device or a previous baseband device through the uplink port.
8. The baseband data combining method according to claim 7, further comprising a cascade port, wherein the cascade port is connected to a next baseband expansion device.
9. The baseband data combining method according to claim 1, wherein the downlink port is connected to a radio remote unit, and the uploaded data packet is uploaded by the radio remote unit through the downlink port.
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