WO2017076131A1

WO2017076131A1 - Method and apparatus for sending data frame, baseband board, and radio remote unit

Info

Publication number: WO2017076131A1
Application number: PCT/CN2016/099237
Authority: WO
Inventors: 朱安华; 张迪强; 杨志鸿
Original assignee: 中兴通讯股份有限公司
Priority date: 2015-11-04
Filing date: 2016-09-18
Publication date: 2017-05-11
Also published as: CN106656410B; CN106656410A

Abstract

A method and apparatus for sending a data frame, a baseband board, and a radio remote unit. The method comprises: receiving a downlink service data stream sent by a digital signal processor (DSP) of a baseband; inserting a frame header identifier of which a data frame period is predetermined time into first service data of each data frame of the downlink service data stream, the frame header identifier being used for indicating a frame header position; and sending a downlink data frame into which the frame header identifier is inserted.

Description

Method and device for transmitting data frame, baseband board and radio remote unit

Technical field

This application relates to, but is not limited to, the field of communication technology.

Background technique

In the Digital Digital Trunking (PDT) system, when the uplink data is collected, the baseband chip, such as a digital signal processor (DSP), needs to search for the frame header in the upstream service flow. After the frame header is searched, the frame can be processed. However, the task of searching for the frame header always occupies the central processing unit (CPU) resource of the baseband chip, resulting in a high CPU usage.

Summary of the invention

The following is an overview of the topics detailed in this document. This Summary is not intended to limit the scope of the claims.

The present invention provides a method and device for transmitting a data frame, a baseband board and a radio remote unit, to solve the problem that the baseband chip in the related art needs to search for a frame header in an uplink service flow, and can perform service processing on the frame after searching for a frame header. Because the task of searching for the frame header will always occupy the CPU resources of the baseband chip, resulting in a problem of high CPU usage.

A method of transmitting a data frame, comprising:

Receiving a downlink service data stream sent by the processing chip digital signal processing DSP of the baseband board;

Inserting, in a first service data of each downlink data frame of the downlink service data stream, a frame header identifier of a data frame period that is a predetermined time, where the frame header identifier is used to indicate a frame header position;

Sending a downlink data frame inserted into the header identifier.

Optionally, before the receiving the downlink service data stream sent by the processing chip DSP of the baseband board, the method further includes:

Obtaining, by the baseband board, the predetermined time, using the predetermined time as the data frame period;

And transmitting a hardware interrupt to the DSP according to the data frame period, so that the DSP sends the downlink service data stream.

Optionally, after the sending the downlink data frame inserted in the frame header identifier, the method further includes:

The radio remote unit RRU extracts the frame header identifier at a frame header of the downlink data frame;

The extracted frame header identifier is subjected to a delay processing of a predetermined time, and the frame header identifier after the delay processing is inserted into the uplink service data stream.

Optionally, after the delaying the processed frame header identifier is inserted into the uplink service data stream, the method further includes:

After the baseband board detects the frame header of the uplink data frame of the uplink service data stream, sending a hardware interrupt to the DSP, to notify the DSP that the frame header position of the uplink data frame has arrived, so that The DSP parses a frame header of the uplink data frame.

A device for transmitting a data frame, comprising:

The first receiving module is configured to: receive a downlink service data stream sent by the processing chip digital signal processing DSP of the baseband board;

a processing module, configured to: insert, in a first service data of each downlink data frame of the downlink service data stream received by the first receiving module, a frame header identifier with a data frame period of a predetermined time, where The frame header identifier is used to indicate the frame header position;

The first sending module is configured to: send the processing module to insert a downlink data frame that is identified by the frame header.

Optionally, the device further includes:

Obtaining a module, configured to: acquire the predetermined time, and use the predetermined time as the data frame period;

The second sending module is configured to: send a hardware interrupt to the DSP according to the data frame period acquired by the acquiring module, so that the DSP sends the downlink service data stream.

Optionally, the device further includes:

The third sending module is configured to: detect the uplink number of the uplink service data flow on the baseband board After the frame header of the frame, a hardware interrupt is sent to the DSP to notify the DSP that the frame header position of the uplink data frame has arrived, so that the DSP parses the frame header of the uplink data frame.

A baseband board comprising: the apparatus for transmitting a data frame as described in any one of the preceding claims.

An apparatus for processing a data frame, interacting with the apparatus for transmitting a data frame according to any of the preceding claims, the apparatus comprising:

The extracting module is configured to: extract the frame header identifier at a frame header of the downlink data frame, where the downlink data frame is a data frame in which the frame header identifier is inserted;

The processing module is configured to: perform delay processing on the frame header identifier extracted by the extraction module for a predetermined time, and insert the frame header identifier after the delay processing into the uplink service data stream.

A radio remote unit RRU comprising: means for processing a data frame as described above.

The method and device for transmitting a data frame provided by the embodiment of the present invention, the baseband board and the radio remote unit, insert a frame header identifier in the first service data of each downlink data frame when the downlink service data stream is sent by the DSP, And sending a downlink data frame that is inserted into the frame header identifier, where the downlink data frame identified by the insertion frame header carries a frame header identifier; thus, when the service data stream is received, the frame header may be determined by finding the frame header identifier of the data frame. The embodiment of the present invention solves the problem that the baseband chip in the related art needs to search for the frame header in the uplink service flow, and the service can be processed on the frame after searching for the frame header. Since the task of searching the frame header always occupies the CPU of the baseband chip. Resources, resulting in higher CPU usage.

Other aspects will be apparent upon reading and understanding the drawings and detailed description.

BRIEF abstract

FIG. 1 is a flowchart of a method for sending a data frame according to an embodiment of the present invention;

2 is a flowchart of another method for sending a data frame according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of an apparatus for sending a data frame according to an embodiment of the present disclosure;

4 is a schematic structural diagram of another apparatus for transmitting a data frame according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of another apparatus for transmitting a data frame according to an embodiment of the present disclosure;

FIG. 6 is a schematic structural diagram of an apparatus for processing a data frame according to an embodiment of the present disclosure;

FIG. 7 is a schematic structural diagram of a method for processing a data frame according to an embodiment of the present invention.

Embodiments of the invention

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be noted that, in the case of no conflict, the features in the embodiments and the embodiments herein may be arbitrarily combined with each other.

The steps illustrated in the flowchart of the figures may be executed in a computer system in accordance with a set of computer executable instructions. Also, although logical sequences are shown in the flowcharts, in some cases the steps shown or described may be performed in a different order than the ones described herein.

In order to solve the related art, the baseband chip needs to search for the frame header in the uplink service flow, and the frame processing can be performed after the frame header is searched. Since the task of searching the frame header always occupies the CPU resources of the baseband chip, the CPU is occupied. The method of the present invention provides a method, a device, and a baseband board for transmitting data frames.

As shown in FIG. 1 , it is a flowchart of a method for sending a data frame according to an embodiment of the present invention. The method for sending a data frame provided by this embodiment may include the following steps, that is, S110 to S130:

S110. Receive a downlink service data stream sent by a processing chip DSP of the baseband board.

S120, inserting, in a first service data of each downlink data frame of the service data stream, a frame header identifier of a data frame period that is a predetermined time, where the frame header identifier is used to indicate a frame header position;

S130. Send a downlink data frame that is inserted into the frame header identifier.

The method for transmitting a data frame provided by the embodiment of the present invention inserts a frame header identifier into the first service data of each downlink data frame and sends a downlink data frame inserted with the frame header identifier when the downlink service data stream is sent by the DSP. The downlink data frame identified by the inserted frame header carries the frame header identifier. Therefore, when the service data stream is received, the frame header position can be determined by finding the frame header identifier of the data frame. The embodiment of the present invention solves the related art. In the upstream service flow, the medium baseband chip needs to search for the frame header all the time. After searching the frame header, the frame can be processed for the service. Since the task of searching the frame header always occupies the CPU resources of the baseband chip, the CPU usage is high. problem.

Optionally, FIG. 2 is a flowchart of another method for sending a data frame according to an embodiment of the present invention. On the basis of the embodiment shown in FIG. 1, the method provided in this embodiment may further include S100-S101 before receiving the service data stream sent by the processing chip DSP of the baseband board, that is, before S110:

S100. The baseband board acquires a predetermined time, and the predetermined time is used as a data frame period.

S101. Send a hardware interrupt to the DSP according to the data frame period, so that the DSP sends the downlink service data stream.

Optionally, in the embodiment of the present invention, after the DSP sends the downlink data frame that is inserted into the frame header identifier, the S140 to the S150 may be further included:

S140, a remote radio unit (RRU) extracts a frame header identifier at a frame header of the downlink data frame.

S150: Perform a delay processing on the extracted frame header identifier for a predetermined time, and insert the delayed frame header identifier into the uplink service data stream.

In the process of S150, the delay processing waits for a predetermined time after extracting the frame header identifier, and then inserts the frame header identifier into the uplink service data stream.

Optionally, in the embodiment of the present invention, after S150, S160 may be further included:

S160. After the baseband board detects the frame header of the uplink data frame of the uplink service data stream, send a hardware interrupt to the DSP, to notify the DSP that the frame header position of the uplink data frame has arrived, so that the DSP parses the frame of the uplink data frame. head.

FIG. 3 is a schematic structural diagram of an apparatus for transmitting a data frame according to an embodiment of the present invention. The structure of the apparatus for sending a data frame provided in this embodiment may include: a first receiving module 10 and a processing module 20 And the first sending module 30.

The first receiving module 10 is configured to: receive a downlink service data stream sent by the processing chip DSP of the baseband board;

The processing module 20 is coupled to the first receiving module 10, and the processing module 20 is configured to insert a data frame period into the first service data of each downlink data frame of the downlink service data stream received by the first receiving module 10. a frame header identifier of time, wherein the frame header identifier is used to indicate a frame header position;

The first sending module 30 is coupled to the processing module 20, and the first sending module 30 is configured to: the sending processing module 20 inserts a downlink data frame identified by the frame header.

The apparatus for transmitting a data frame provided by the embodiment of the present invention inserts a frame header identifier into the first service data of each downlink data frame and sends a downlink data frame inserted with the frame header identifier when the downlink service data stream is sent by the DSP. The downlink data frame identified by the inserted frame header carries a frame header identifier; When the service data stream is received, the frame header position of the data frame is determined, and the frame header position is determined. The embodiment of the present invention solves the problem that the baseband chip needs to search for the frame header in the uplink service flow in the related art, and the search is performed. After the frame header, the service processing of the frame can be performed. Since the task of searching for the frame header always occupies the CPU resources of the baseband chip, the CPU usage is high.

Optionally, FIG. 4 is a schematic structural diagram of another apparatus for transmitting a data frame according to an embodiment of the present invention. The apparatus provided in this embodiment may further include:

The obtaining module 40 is configured to: acquire a predetermined time, and use the predetermined time as a data frame period;

The second sending module 50 is coupled to the obtaining module 40. The second sending module 50 is configured to: send a hardware interrupt to the DSP according to the data frame period acquired by the obtaining module 40, so that the DSP sends the downlink service data stream.

Optionally, FIG. 5 is a schematic structural diagram of another apparatus for transmitting a data frame according to an embodiment of the present invention. The apparatus provided in this embodiment may further include:

The third sending module 60 is configured to: after the baseband board detects the frame header of the uplink data frame of the uplink service data stream, send a hardware interrupt to the DSP, to notify the DSP that the frame header position of the uplink data frame has arrived, so that the The DSP parses the frame header of the upstream data frame.

FIG. 6 is a schematic structural diagram of an apparatus for processing a data frame according to an embodiment of the present invention, where the apparatus for processing a data frame and the foregoing sending data frame in any of the embodiments shown in FIG. 3 to FIG. The apparatus for processing data frames provided by this embodiment may include: an extraction module 70 and a processing module 80.

The extracting module 70 is configured to: extract a frame header identifier at a frame header of the downlink data frame, where the downlink data frame is a data frame inserted into the frame header identifier;

The processing module 80 is coupled to the extraction module 70. The processing module 80 is configured to: perform delay processing on the header identifier extracted by the extraction module 70 for a predetermined time, and insert the frame header identifier after the delay processing into the uplink service data stream. in.

The embodiment of the present invention further provides a baseband board and an RRU, wherein the baseband board includes the apparatus for transmitting data frames in any of the foregoing embodiments shown in FIG. 3 to FIG. 5, and the RRU includes the embodiment in the embodiment shown in FIG. A device that processes data frames. According to the above description, those skilled in the art know how to set the above device in the baseband board and the RRU, and details are not described herein again.

The uplink and downlink service data are replaced by 30 milliseconds (ms) (the following 30 ms is replaced by T). Generally, the baseband chip (ie, DSP) needs to search the frame header in the uplink service data stream for the uplink service processing, so that the search frame is searched. The task of the head will always occupy the CPU resources of the baseband chip. An embodiment of the present invention provides a method for processing a baseband processing chip to process an uplink frame header. The method includes two parts: transmitting and receiving data, which can be applied to a PDT product for frame header positioning of a baseband uplink data frame.

The baseband processing unit (BBU) frame of the board includes: a backplane, a power board, a clock main control board, a baseband board, a fan, and a fan control board, wherein the baseband board is a long-term evolution. (Long Term Evolution, LTE for short) BaseBand Process of LTE (BPL) 1, which is implemented on the BPL1 board in the embodiment of the present invention. The power supply board provides the power required by the entire board. The fan heats all the boards to prevent the temperature from being too high. The clock main control board provides the timing signals and clocks required by the baseband board. The baseband board completes the modulation and solution of the uplink and downlink baseband data. The processing is performed, and the in-phase and quadrature are completed simultaneously, that is, the exchange of IQ data (service data) and the access function of the RRU; the backplane provides a communication interface between the boards.

FIG. 7 is a schematic structural diagram of a method for processing a data frame according to an embodiment of the present invention. The method for processing a data frame provided by this embodiment may include the following processes:

Step 1: The baseband board, that is, the Field Programmable Gate Array (FPGA) of the BPL1, obtains the timing reference of the period T from the clock main control board, and sends the interrupt to the baseband processing in the cycle of T. After the DSP chip receives the interrupt, the DSP starts to send the downlink service data stream.

The second step: the baseband board (BPL1) inserts the frame header flag S0 of the period T into the first IQ data of the downlink service data stream, and then the frame header flag S0 arrives at the downlink RRU intermediate frequency along with the IQ data. The RRU IF sends the frame header to S0 for a fixed delay, and then sends it back to the RRU's upstream data processing module, and finally to the baseband board.

It is shown in FIG. 7 that after the IQ data arrives at the intermediate frequency of the RRU, and then the frame header flag S0 is fixed in the RRU intermediate frequency for a fixed delay (as shown, the delay is Ta+Tb), and then sent back. In the uplink service data stream, the delays Ta and Tb here are calculated based on the actual design of the RRU intermediate frequency.

Step 3: After detecting the frame header flag S0 in the uplink, the baseband board sends the frame header flag S0 to the baseband-processed DSP chip in an interrupted manner, thus providing a reference point of the frame header of the uplink data frame. The DSP searches for the frame header of the uplink data frame within a range of up to 32 sample points before and after the interruption. Under normal circumstances, the frame header position can be found within 8 sample points.

In the process of implementing the second step, the baseband board inserts a frame header flag S0 (the frame header is S0) in the first IQ data for each downlink data frame of the period T, and the intermediate frequency from the insertion position to the RRU. The module, the frame header flag S0 and the service data stream do exactly the same delay, and the service data stream is transmitted in the direction indicated by the arrow. When the frame header flag S0 reaches the RRU's IF module, it performs a fixed delay and then sends it back to the upstream service data stream.

Assume that the fixed delay of the RRU IF module to the frame header flag S0 is represented by D, then D = (delay of the downlink IF input to the antenna port Ta) + (the delay of the uplink antenna port to the intermediate frequency output Tb), after the delay of Ta After that, the frame header flag S0 and the frame header of the downlink data frame of the air interface are consistent; after the Tb delay, the position of the frame header flag S0 in the intermediate frequency module is substantially consistent with the frame header of the uplink data frame.

In the process of the third step, after the frame header flag S0 and the uplink service data stream arrive at the baseband board, the frame header flag S0 is extracted, and is sent as an interrupt to the DSP to provide a reference position of the frame header of the uplink data frame. Finally, the DSP searches for the frame header of the uplink data frame within the range of 32 sampling points centered on the reference point.

Taking the PDT project as an example, the uplink rate is 38400 samples/sec, and each sampling point is 32 bits, occupying 26 microseconds (us). That is, the DSP searches for the frame header of the uplink data frame within about 0.83 milliseconds (ms) of the 32 sample points centered on the interrupt. However, the embodiment of the present invention is not limited to the above method of processing a data frame applied to a PDT project, and is also applicable to a mobile communication system in which another system requires a baseband chip to search for a frame header of an uplink data frame. For example, in a Code Division Multiple Access (CDMA) system, the service flow period is 10 ms. You can also use this method to insert a downlink header of 10 ms into the downlink service data stream. The method is extracted and provided to the reference point of the CDMA baseband chip uplink service frame header for searching for the frame header of the uplink data frame.

The embodiment of the present invention provides a reference point of a frame header of an uplink data frame, so that the DSP searches for a frame header of the uplink data frame in a small range centered on the reference point, so that the DSP does not need to search for the frame header on the entire time axis. , simplifying the complexity of the baseband chip searching for the header of the uplink data frame, and reducing the complexity CPU usage of the DSP chip.

One of ordinary skill in the art will appreciate that all or a portion of the steps of the above-described embodiments can be implemented using a computer program flow, which can be stored in a computer readable storage medium on a corresponding hardware platform (according to The system, device, device, device, etc. are executed, and when executed, include one or a combination of the steps of the method embodiments.

Alternatively, all or part of the steps of the above embodiments may also be implemented by using an integrated circuit. These steps may be separately fabricated into individual integrated circuit modules, or multiple modules or steps may be fabricated into a single integrated circuit module. achieve.

The devices/function modules/functional units in the above embodiments may be implemented by a general-purpose computing device, which may be centralized on a single computing device or distributed over a network of multiple computing devices.

When the device/function module/functional unit in the above embodiment is implemented in the form of a software function module and sold or used as a stand-alone product, it can be stored in a computer readable storage medium. The above mentioned computer readable storage medium may be a read only memory, a magnetic disk or an optical disk or the like.

Industrial applicability

When the downlink service data stream is sent by the DSP, the frame header identifier is inserted into the first service data of each downlink data frame, and the downlink data frame inserted into the frame header identifier is sent, and the inserted frame header identifier is downlinked. The data frame carries the frame header identifier. Therefore, when the service data stream is received, the frame header position can be determined by finding the frame header identifier of the data frame. The embodiment of the present invention solves the related art in which the baseband chip is in the uplink service flow. The frame header needs to be searched all the time, and the frame can be processed after the frame header is searched. Since the task of searching for the frame header always occupies the CPU resources of the baseband chip, the CPU usage is high.

Claims

A method of transmitting a data frame, comprising:

Receiving a downlink service data stream sent by the processing chip digital signal processing DSP of the baseband board;

Inserting, in a first service data of each downlink data frame of the downlink service data stream, a frame header identifier of a data frame period that is a predetermined time, where the frame header identifier is used to indicate a frame header position;

Sending a downlink data frame inserted into the header identifier.
The method of claim 1, wherein the method further comprises: before receiving the downlink service data stream sent by the processing chip DSP of the baseband board:

Obtaining, by the baseband board, the predetermined time, using the predetermined time as the data frame period;

And transmitting a hardware interrupt to the DSP according to the data frame period, so that the DSP sends the downlink service data stream.
The method according to claim 1 or 2, wherein after the sending the downlink data frame inserted in the header identifier, the method further comprises:

The radio remote unit RRU extracts the frame header identifier at a frame header of the downlink data frame;

The extracted frame header identifier is subjected to a delay processing of a predetermined time, and the frame header identifier after the delay processing is inserted into the uplink service data stream.
The method according to claim 3, wherein after the delaying the processed frame header identifier is inserted into the uplink service data stream, the method further includes:

After the baseband board detects the frame header of the uplink data frame of the uplink service data stream, sending a hardware interrupt to the DSP, to notify the DSP that the frame header position of the uplink data frame has arrived, so that The DSP parses a frame header of the uplink data frame.
A device for transmitting a data frame, comprising:

The first receiving module is configured to: receive a downlink service data stream sent by the processing chip digital signal processing DSP of the baseband board;

a processing module, configured to: insert, in a first service data of each downlink data frame of the downlink service data stream received by the first receiving module, a frame header identifier with a data frame period of a predetermined time, where The frame header identifier is used to indicate the frame header position;

The first sending module is configured to: send the processing module to insert a downlink data frame that is identified by the frame header.
The apparatus of claim 5 further comprising:

Obtaining a module, configured to: acquire the predetermined time, and use the predetermined time as the data frame period;

The second sending module is configured to: send a hardware interrupt to the DSP according to the data frame period acquired by the acquiring module, so that the DSP sends the downlink service data stream.
The apparatus according to claim 5 or 6, further comprising:

The third sending module is configured to: after the baseband board detects the frame header of the uplink data frame of the uplink service data stream, send a hardware interrupt to the DSP, to notify the DSP of the frame header of the uplink data frame The location has arrived so that the DSP parses the header of the upstream data frame.
A baseband board comprising: means for transmitting a data frame according to any one of claims 5-7.
An apparatus for processing a data frame, the apparatus for transmitting a data frame according to any one of claims 5 to 7, the apparatus comprising:

The extracting module is configured to: extract the frame header identifier at a frame header of the downlink data frame, where the downlink data frame is a data frame in which the frame header identifier is inserted;

The processing module is configured to: perform delay processing on the frame header identifier extracted by the extraction module for a predetermined time, and insert the frame header identifier after the delay processing into the uplink service data stream.
A radio remote unit RRU comprising: the apparatus for processing a data frame according to claim 9.