WO2013185615A1

WO2013185615A1 - Remote control information transmission method and system

Info

Publication number: WO2013185615A1
Application number: PCT/CN2013/077170
Authority: WO
Inventors: 包盛花
Original assignee: 华为技术有限公司
Priority date: 2012-06-11
Filing date: 2013-06-13
Publication date: 2013-12-19
Also published as: CN103491561A; CN103491561B

Abstract

Provided is a remote control information reception method. Wide envelope modulation is predefined as follows: a character is repeated in byte units several times, and a plurality of repeated characters are taken as one character; and wide envelope demodulation is a reverse process of the wide envelope modulation. The method comprises: receiving a link setup request, and parsing the link setup request using both a communication protocol mode and a wide envelope modulation mode respectively; when the communication protocol has failed and the link setup request conforms to the wide envelope modulation mode, switching to a wide envelope modulation/demodulation operating mode, and sending a link setup response message; and receiving remote control information. The remote control information reception method provided in the present application, when a failure of a link based on a communication protocol occurs, realizes the transmission of remote control information by means of a wide envelope modulation/demodulation mode independent of the communication protocol, and solves the problem that a remote device is detached and has failed to receive the remote control information, resulting in a need for going to the remote device site to maintain it.

Description

Remote control information transmission method and system

The present invention relates to the field of network communication technologies, and in particular, to a remote control information transmission method and system. Background technique

The wireless distributed base station is composed of a Radio Equipment Control (REC) and a Radio Equipment (RE), and the communication interface between the two is a Common Public Radio Interface (CPRI). Or Open Base Station Architecture Initiative (OBSAI), or Open Radio Equipment Interface (ORI), or Base Band Unit (BBU) and Radio Remote Unit (Remote RF Unit) Interface between the RRU and the BBU (IR), that is, the communication between the RF device controller and the RF device is based on the above communication protocol.

When communication between the RF device controller and the RF device is required, the communication link needs to be established first. If the communication link is not established, the RF device controller cannot control and modulate the RF device, and the communication link needs to be in each protocol. The function unit can be established only when it is normal. Taking the CPRI protocol as an example, the CPRI protocol includes a physical layer (Layer 1) and a data link layer (Layer 2). Based on the CPRI protocol, the data flow between the RF device controller and the RF device is transmitted at the physical layer and the data link layer. Therefore, the communication link between the RF device controller and the RF device needs to be established after the physical layer and the data link layer are normal. If the physical layer or the data link layer of the CPRI protocol on the radio device fails, the communication link between the radio device controller and the radio device is disconnected, causing the radio device to be disconnected. The radio device controller cannot be used for the radio device. The maintenance operation is performed. Because the RF device controller and the RF device are not in one place, when the RF device is disconnected, the remote control information cannot be transmitted. The RF device needs to be maintained on site, which not only extends the RF device. Maintenance time and high maintenance costs. Summary of the invention

The embodiment of the present invention provides a remote control information transmission method, by adding a modulation and demodulation module to both sides of the communication, and when the link based on the communication protocol fails, the remote control information is implemented by the wide envelope modulation and demodulation mode. The transmission solves the problem that the remote device cannot receive the remote control information and needs to be maintained at the remote device.

An embodiment of the present invention provides a remote control information receiving method, including: receiving a link establishment request, and parsing the link establishment request by using a communication protocol and a wide envelope demodulation method respectively;

When the communication protocol parses the error, and the link establishment request conforms to the wide envelope modulation mode, switches to the wide envelope modulation and demodulation mode, and the link establishment request is parsed according to the application of the wide envelope demodulation mode. Sending a link setup response message;

Receiving remote control information through the link;

Wherein the wide envelope demodulation is an inverse process of wide envelope modulation, the character is repeated several times in units of bytes, and a plurality of repeated characters are taken as one character.

A method for transmitting remote control information includes:

When detecting a communication link failure based on the communication protocol, switching the working mode to the wide envelope modem operation mode, and transmitting a wide envelope communication link establishment request;

After receiving the link setup response message, the control message to be transmitted is subjected to wide envelope modulation, and the wide envelope-modulated control information is sent through the established wide envelope communication link;

Wherein, the wide envelope modulation is that the characters are repeated several times in units of bytes, and a plurality of repeated characters are used as one character, and the wide envelope is demodulated into a reverse process of wide envelope modulation.

A remote control information receiving system includes:

a first wide envelope demodulation module, configured to perform wide envelope demodulation on the received information; a first switching module, configured to parse an error when the communication protocol is parsed, and the first wide envelope demodulation module solution When the link setup request is invoked to conform to the wide envelope modulation mode, switch to the wide envelope modem operation mode, and send a link setup response message;

a first wide envelope modulation module for performing wide envelope modulation on the information to be transmitted; the wide envelope modulation is to perform characters in a number of repetitions in bytes, and A number of repeated characters are used as one character, and the wide envelope is demodulated into an inverse process of wide envelope modulation. A remote control information sending system includes:

a second switching module, configured to switch to a wide envelope modem operation mode when detecting that a communication link based on the communication protocol fails;

a second wide envelope modulation module for performing wide envelope modulation on the information to be transmitted; a second wide envelope demodulation module for performing wide envelope demodulation on the received information; the wide envelope modulation is The characters are repeated several times in units of bytes, and a number of repeated characters are taken as one character, and the wide envelope is demodulated into an inverse process of wide envelope modulation.

The remote control information transmission method provided by the embodiment of the present invention is used to implement control over an existing physical link such as a cable or an optical fiber when a communication link based on a communication protocol between the control terminal and the controlled terminal fails. The terminal and the controlled terminal control the transmission of information. When detecting that the communication link based on the communication protocol fails, the control end sends a wide envelope link setup request to the controlled end, and the controlled end uses the communication protocol and the wide envelope demodulation to establish a link establishment request respectively. Performing parsing, and when the communication protocol parses the error and the wide envelope demodulates the wide envelope link setup request to conform to the wide envelope demodulation mode, switches to the wide envelope demodulation mode, and sends the link setup response to the control end. A wide envelope adjustment demodulation communication link is established, and the remote control information is transmitted through the link.

The remote control information transmission method provided by the present application establishes a transmission channel of the remote control information by establishing a wide envelope modulation and demodulation mode, so that the communication between the control terminal and the controlled terminal is based on the configuration of the external device. When the link of the protocol fails, the control information and simple modulation information can still be transmitted, and the remote control of the control terminal can be realized, which can realize the rapid maintenance of the control terminal, avoid the maintenance of the controlled terminal, and reduce the maintenance of the controlled terminal. cost. Attachment

1 is a flow chart of a remote control information receiving method according to an embodiment of the present invention;

2 is a flow chart of a remote control information sending method according to an embodiment of the present invention;

3 is a schematic structural diagram of a remote control information receiving system according to an embodiment of the present invention; FIG. 4 is a schematic structural diagram of a remote control information sending system according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a system of a distributed base station according to an embodiment of the present invention. detailed description

The detailed description of the present invention and the accompanying drawings are to be understood as

Before describing the embodiment of the present application, two definitions need to be clarified. In the embodiment of the present application, the wide envelope modulation refers to performing a number of repetitions of characters in units of bytes, and using a plurality of repeated characters as one character; , the character to be transmitted is "00011010", then the wide envelope modulation is to repeat "0001 1010" several times, and the several repeated "00011010" is transmitted as one character, assuming that the number of repetitions is 7, then "0001 1010" The characters after wide envelope modulation are, that is, the wide envelope modulation is repeated in bytes for the information to be transmitted. As for the specific application of wide envelope modulation, how many repeated characters are used to represent a character, The invention is not specifically limited.

Wide envelope demodulation is the inverse of wide envelope modulation.

Embodiment 1 is a flowchart of a remote control information receiving method according to Embodiment 1 of the present invention, which includes:

Step S101: Receive a link establishment request, and parse the link establishment request by using a communication protocol and a wide envelope demodulation method respectively;

When receiving the link establishment request, in order to determine whether it is a protocol-based communication link establishment request or a wide envelope link establishment request, the link establishment request is parsed by using the communication protocol and the wide envelope demodulation method respectively. If the link setup request is a wide envelope link setup request, then when the application communication protocol parses it, the communication protocol will report an error.

The link setup request is parsed, that is, the link setup request is demodulated, and the link setup request is demodulated to determine whether the link setup request conforms to the wide envelope modulation mode, that is, whether the link setup request is A number of repeating characters are used to represent a character. It is well known to determine whether the link establishment request is a communication protocol modulation method, and details are not described herein again. Step S102: When the communication protocol parses an error, and the link establishment request conforms to a wide envelope modulation mode, switching to a wide envelope modem operation mode, and transmitting a link setup response message;

Specifically, when the communication protocol parsing mode reports an error and the link establishment request uses a plurality of repeated characters to represent one character, it is determined that the link establishment request is a wide envelope modulation mode, and switches to a wide envelope modem operation. Mode, and send a link setup response message;

In the specific implementation process, since the control end and the controlled end may not be completely synchronized, data may generate bit errors during the transmission process, so in order to ensure that the received data can be parsed correctly, it is necessary to filter the data after the wide envelope demodulation. Specifically, the majority decision can be used as the filtering criterion, that is, when the number of repetitions of the characters in the modulated data satisfies the preset condition, specifically, when the number of repetitions exceeds half, it is considered to be a wide envelope modulation, and the character is the control. The character transmitted at the end.

In the following, taking the wide envelope modulation of "00011010" as an example, here the repetition number is 7, then the correct modulation result should be but because of the possible error in the transmission link, the received wide envelope modulation information may Since the wide envelope modulation is modulation in units of bytes, the demodulation process is also demodulated in units of bytes, but due to the presence of errors in the link, the wide envelope received as described above is used. When the modulation information is demodulated, the wide envelope modulation method is not fully resolved. The analysis result is "0001 1010" appears 6 times, and "00011011" appears once, but the number of occurrences of "00011010" is large. In part, it accounts for 6/7. Therefore, it can be explained that the modulation method is wide envelope modulation, and the received data is "0001 1010". That is, as long as the number of repetitions of "0001 1010" is more than half of the total number of repetitions, the received data is considered correct.

Specifically, in demodulation, the number of repetitions of the parsed data may be any value above half of the number of repetitions used by the modulation method, that is, if the number of repetitions used in the modulation process is

N, the number of repetitions of the demodulated data is n, then, as long as n>N/2, the received data is considered correct. The specific value of n may be a number specified by the user himself according to the empirical value.

When the communication protocol is correctly parsed, regardless of whether the wide envelope demodulation resolves whether the link setup request conforms to the wide envelope modulation mode, it does not switch to the wide envelope modulation and demodulation mode, but With the current working mode, the communication protocol is continued to communicate.

When the communication protocol parses an error, and the link establishment request does not conform to the wide envelope modulation mode, the fault alarm information is transmitted.

Step 103: Receive remote control information through the link.

Through the above two steps, a wide envelope communication link can be established, which is independent of the communication protocol, that is, independent of the communication protocol, so after establishing a wide envelope communication link, the width can be passed. The envelope communication link receives the remote control information.

Embodiment 2

FIG. 2 is a flowchart of a remote control information sending method according to Embodiment 2 of the present invention, including:

Step S201: When detecting a communication link failure based on the communication protocol, switching the working mode to the wide envelope modem operation mode, and transmitting a wide envelope communication link establishment request; between the control end and the controlled end When the communication link is completely normal, the communication between the control end and the controlled end is based on the communication protocol (CPRI, ORI, IR or OBSAI). Taking the CPRI protocol as an example, the functional units of the CPRI protocol are divided into a data link layer and In the physical layer, when a unit of the communication protocol in the controlled terminal fails, the communication link between the control terminal and the controlled terminal is interrupted, and the controlled terminal is taken out of control, and the control terminal cannot be controlled to the controlled terminal. Controlling, when detecting that the controlled end is out of control, switching to the wide envelope modem operation mode, and then transmitting a wide envelope communication link establishment request to the controlled end, the wide envelope communication link establishment request is also passed Transmitted after wide envelope modulation.

Step S202: After receiving the link setup response message, the control message to be transmitted is subjected to wide envelope modulation, and the control information after the wide envelope modulation is transmitted through the established wide envelope communication link.

After receiving the link setup response message, it indicates that a wide envelope communication link has been established, at which time the control information to be transmitted is subjected to wide envelope modulation, and the modulated control information is transmitted through the wide envelope communication link. , control the controlled end. If the link setup response message is not received within the predetermined time, the wide envelope link setup request is sent again after a certain time interval.

According to the foregoing embodiment, the solution can be implemented under the condition that the external physical configuration is unchanged, and the wide-envelope communication link is established, and the physical link such as the optical fiber and the cable and the high-speed serial-to-parallel converter are good. The transmission does not depend on the quality of the various functional units of the communication protocol and the synchronization of the clock. Once the wide envelope communication link is established, the control terminal is successful. Simple control of the controlled end.

Embodiment 3

A schematic diagram of a remote control information receiving system provided in Embodiment 3 of the present application is as shown in FIG. 3, including:

The wide envelope demodulation module 301, the first switching module 302 and the wide envelope modulation module 303; the first wide envelope demodulation module 301 is configured to perform wide envelope demodulation on the received information, and the received information Including a link setup request message;

The first switching module 302 is configured to switch to a wide envelope when the communication protocol parses an error, and the first wide envelope demodulation module 301 demodulates that the link setup request message conforms to a wide envelope modulation mode. Modulating the working mode, and transmitting a link setup response message;

Preferably, the first switching module 302 is further configured to maintain the current working mode and not switch the working mode when the communication protocol is correctly parsed regardless of whether the link establishment request conforms to the wide envelope modulation mode. The first wide envelope modulation module 303 is configured to perform wide envelope modulation on the information to be transmitted.

The method for the link setup request to conform to the wide envelope modulation manner includes: the number of repetitions of the request information in the link establishment request meets a preset condition.

In order to further optimize the foregoing embodiment, a remote control information receiving system provided in Embodiment 3 of the present application further includes an alarm module 304, configured to parse an error when the communication protocol is parsed, and the first wide envelope demodulation module is solved. When the link setup request is called to conform to the wide envelope modulation mode, the fault alarm information is sent.

Embodiment 4

A schematic diagram of a remote control information sending system provided in Embodiment 3 of the present application is as shown in FIG. 4, including:

a second switching module 401, a second wide envelope modulation module 402 and a second wide envelope demodulation module 403;

The second switching module 401 is configured to switch to a wide envelope modem operation mode when detecting a failure of the communication link based on the communication protocol;

The second wide envelope modulation module 402 is configured to perform wide envelope modulation on the information to be transmitted; the second wide envelope demodulation module 403 is configured to perform wide envelope demodulation on the received information. Specifically, an infinitely distributed base station can be taken as an example, as shown in FIG. 5, which is a schematic diagram of a system architecture of a distributed base station. The infinite distributed base station is composed of a radio frequency device controller (REC, which is a control end) and a radio frequency device (RE, which is a controlled end). In this solution, the radio frequency device is controlled. A communication link based on the communication protocol can be established between the device and the RF device, and is used for completing service data communication and communication protocol-based control information between the RF device controller and the RF device, and also establishing a wide envelope communication link. For enabling a wide-envelope communication link when a communication link based on a communication protocol fails, the RF device controller sends control information through a wide-envelope communication link, and performs simple control on the RF device, such as controlling the RF device. Reset and restart, etc., you can also command the RF device to transmit some simple and small amount of important debugging information to the RF device controller.

When the link between the radio equipment controller (REC) and the radio equipment (RE) is completely normal, the two can communicate through the functional units of the communication protocol (CPRI, ORI, IR or OBSAI), specifically, the radio frequency. The device controller encapsulates the information to be transmitted through the communication protocol, and then transmits the data encapsulated by the protocol to the 8B/10B code for transmission; after receiving the information, the RF device first performs 10B/8B decoding on the received information, and then It is parsed by the application communication protocol.

Taking the CPRI protocol as an example, the RF device controller can control the RF device through the data link layer of the CPRI protocol, or control the dynamic envelope modulation function through the logical link of the physical layer and the RF device, that is, the fiber or the fiber at this time. The data transmitted on the cable is encapsulated by the 8B/10B encoded CPRI protocol. When the data link layer of the CPRI protocol in the radio equipment fails, or the physical layer logical link fails or the clock is not synchronized, the RF device controller selects The wide envelope modulation function establishes chain communication with the RF controller, that is, sends a wide envelope communication setup request to the RF device, and the RF device controller receives the switch to the wide envelope demodulation mode; the RF device receives the wide packet. After the communication link establishment request is made, the 10B/8B decoding is performed first, and then the link establishment request is parsed by using the CPRI communication protocol and the wide envelope demodulation respectively, when the CPRI protocol is faulty, and the link is When the setup request conforms to the wide envelope modulation mode, switch to the wide envelope modem operation mode, and use this mode with the RF design. Communication controller and transmits radio link setup response message to the device controller, of course, is the link setup response message to the width envelope modulation, and then to 8B / 10B encoding for transmission through. After receiving the link setup response message, the RF device controller first performs 10B/8B decoding and then performs wide envelope demodulation. Thereafter, the RF device controller can transmit the control information through the wide envelope modulation and demodulation mode, and the RF device can also send the debugging information to the RF device controller through the wide envelope communication link.

Once a wide envelope communication link is established, the RF device controller can operate on the RF device. Perform simple control, for example, command the RF device to reset and restart the RF device, or command the RF device to transmit some simple and small amount of important debugging information to the RF device controller. Often at critical moments, it is only necessary to be able to perform maintenance on the RF equipment by resetting the RF equipment.

According to the foregoing solution, the remote control information transmission method provided by the embodiment of the present application can transmit the remote control information without adding the physical device, thereby avoiding the need for the remote controlled terminal to be disconnected. The problem of being maintained by the control end on site shortens the time of repair by the control end, improves work efficiency, and reduces maintenance costs.

The embodiments of the present invention described above are not intended to limit the scope of the present invention. Any modifications, equivalents, and improvements made within the spirit and scope of the present invention are intended to be included within the scope of the appended claims.

Claims

Claim

A remote control information receiving method, comprising:

Receiving a link establishment request, and parsing the link establishment request by using a communication protocol and a wide envelope demodulation method respectively;

Receiving remote control information through the link;

Wherein, the wide envelope demodulation is an inverse process of wide envelope modulation, and the wide envelope modulation is performed by repeating characters several times in units of bytes, and using a plurality of repeated characters as one character.

2. The method according to claim 1, wherein the link establishment request conforms to the wide envelope modulation mode, including:

The number of repetitions of the request information in the link establishment request satisfies a preset condition.

The method according to claim 1 or 2, further comprising:

When the communication protocol is parsed correctly, the current working mode is maintained.

The method according to claim 1 or 2, further comprising:

When the communication protocol parses an error, and the link establishment request does not conform to the wide envelope modulation mode, the fault alarm information is sent.

A remote control information sending method, comprising:

When detecting a communication link failure based on the communication protocol, switching the working mode to the wide envelope modulation demodulation mode of operation, and transmitting a wide envelope communication link establishment request;

After receiving the link setup response message, the control message to be transmitted is subjected to wide envelope modulation, and the wide envelope-modulated control information is transmitted through the established wide envelope communication link;

Wherein, the wide envelope modulation is such that the characters are repeated several times in units of bytes, and the repeated envelope characters are taken as one character, and the wide envelope is demodulated into an inverse process of wide envelope modulation.

A remote control information receiving system, comprising:

a first wide envelope demodulation module, configured to perform wide envelope demodulation on the received information, where the received message includes a link setup request message;

a first switching module, configured to switch to a wide envelope modulation solution when the communication protocol is parsed incorrectly, and the first wide envelope demodulation module demodulates the link establishment request according to a wide envelope modulation mode Adjust the working mode, and send a link setup response message;

a first wide envelope modulation module for performing wide envelope modulation on the information to be transmitted; The wide envelope modulation is such that the characters are repeated several times in units of bytes, and a number of repeated characters are taken as one character, and the wide envelope is demodulated into an inverse process of wide envelope modulation.

The system according to claim 6, wherein the link establishment request conforms to the wide envelope modulation mode, including:

The system according to claim 6 or 7, wherein the first switching module is further configured to maintain a current working mode when the communication protocol is parsed correctly.

The system according to claim 6 or 7, further comprising:

The alarm module is configured to send the fault alarm information when the communication protocol parses the error, and the first wide envelope demodulation module demodulates the link setup request to conform to the wide envelope modulation mode.

A remote control information sending system, comprising:

a second switching module, configured to switch to a wide envelope modem operation mode when detecting a communication link-based communication link failure;

a second wide envelope modulation module, configured to perform wide envelope modulation on the information to be sent;

a second wide envelope demodulation module, configured to perform wide envelope demodulation on the received information;

The wide envelope modulation is such that the characters are repeated several times in units of bytes, and a number of repeated characters are taken as one character, and the wide envelope is demodulated into an inverse process of wide envelope modulation.