WO2012003771A1

WO2012003771A1 - Method and system for transmitting data in ring network

Info

Publication number: WO2012003771A1
Application number: PCT/CN2011/076524
Authority: WO
Inventors: 王旭辉
Original assignee: 中兴通讯股份有限公司
Priority date: 2010-07-07
Filing date: 2011-06-28
Publication date: 2012-01-12
Also published as: CN102316499A

Abstract

The present invention provides a method and system for transmitting data in a ring network, and the method includes: a base station controller (BTS) and base transceiver station (BSC) transmit the user data message in the mode of the data frame through a ring network, and the data frame of the user data message is transmitted in group through a first transmission path and a second transmission path; if the first transmission path is determined to be unstable, the user data message transmitted through the first transmission path is transmitted through the second transmission path at the same time. With the solution in the present invention, when the first transmission path is unstable, the transmitter reduces the delay of switching the data transmission path when the data has a skip frame by transmitting the data of the first transmission path through the second transmission path at the same time, thereby improving the quality of service and advancing the user experience; further, when the first transmission path is unstable, the receiver informs the transmitter by adding a skip frame identifier in the data frame transmitted through the second transmission path, thereby responding rapidly, reducing the time of the service interruption and improving the service dependability.

Description

Method and system for data transmission in ring network

The present invention relates to the field of data transmission in a base station subsystem, and in particular to a method and system for data transmission in a ring network. Background technique

At present, the base station in the field of the Global System of Mobile Communication (GSM) transmits the user data in a ring network manner, and the user data packet includes a user plane message and a control plane message, wherein the user The surface message includes voice data, and the control plane message includes various control signaling; the ring network refers to a base station controller (BSC, Base Station Controller) and a base transceiver station (BTS, Base Transceiver Station) controlled thereby. A ring network is formed, between the BSC and the BTS, and the BTS and the BTS are connected through an Abis interface. In the ring network, any BTS and BSC can transmit user data packets from two transmission directions, and the user data packets group user data packets in the form of IP data and transmit them in a frame format. The BSC detects that the transmission line is faulty according to the judgment policy, and needs to switch to another transmission path to transmit data. The judgment strategy may be implemented in different manners, for example, the time when the data is not received exceeds the set duration, etc., the BTS is from another A transmission path continues to send user data packets to the BSC, thereby improving network reliability.

In the traditional Abis ring networking mode, fault detection needs to be performed according to the set judgment strategy before the switching. The switching has a certain delay. This delay is reflected in the fact that when the user uses the mobile terminal, the data of the currently used application is lost. For example, when there is a loss of voice data during a call, the quality of service is degraded, which brings a bad user experience to the user. Summary of the invention

In view of this, the main purpose of the present invention is to provide a method and system for data transmission in a ring network, which reduces delays in data transmission path switching and improves user experience.

In order to solve the above technical problem, the technical solution of the present invention is implemented as follows:

The present invention provides a method for data transmission in a ring network, including:

The base transceiver station BTS and the base station controller BSC transmit the user data packet in the form of a data frame through the ring network, and the data frame of the user data packet is transmitted through the first transmission path and the second transmission path packet to determine the first transmission. The path is unstable, and the user data packet transmitted by the first transmission path is simultaneously transmitted through the second transmission path.

In the foregoing solution, the determining that the first transmission path is unstable includes: reading a frame number of a data frame of the received user data packet, and if the frame sequence number is discontinuous, and the data frame transmitted by the first transmission path is absent, the first transmission The data frame skipped by the path transmission determines that the first transmission path is unstable.

In the above solution, the user data packet transmitted by the first transmission path by the second transmission path is: the receiver adds a frame skip identifier to the data frame of the second transmission path sent to the sender, and the sender receives the The data frame containing the frame skip identifier transmitted by the second transmission path is transmitted to the data frame of the user data packet of the receiver through the first transmission path, and simultaneously transmitted on the second transmission path.

In the above solution, the method further includes: determining that the first transmission path is stable, deleting a frame skip identifier in a data frame of the second transmission path sent to the sender, and the sender receiving the data frame transmitted by the second transmission path, stopping the passage The second transmission path transmits the data frame of the user data message transmitted by the first transmission path.

In the above solution, the method further includes: querying a frame number of the data frame of the received user data packet, and deleting the data frame whose frame sequence number is repeated.

The present invention also provides a system for data transmission in a ring network, comprising: a receiving data processing unit and a sending data processing unit; The receiving data processing unit is located at the receiving end, and is configured to receive, by the sending data processing unit of the transmitting end, the user data packet transmitted by the first transmission path and the second transmission path, determining that the first transmission path is unstable, and requesting the sending data processing unit of the transmitting end Simultaneously transmitting user data messages transmitted by the first transmission path from the second transmission path;

a sending data processing unit, located at the transmitting end, configured to transmit a data frame of the user data packet by using the first transmission path and the second transmission path packet; when the first transmission path is unstable, simultaneously transmitting the first transmission path by using the second transmission path User data message transmitted.

In the above solution, the receiving data processing unit is specifically configured to: read a frame number of a data frame of the received user data packet, and if the frame sequence number is discontinuous, and the data frame transmitted by the first transmission path is absent, the first transmission path The transmitted data frame skips the frame and determines that the first transmission path is unstable.

In the above solution, the receiving data processing unit is located at the receiving end, and is configured to send the data frame skipping frame information transmitted by the first transmission path to the local sending data processing unit; and located at the transmitting end, configured to receive the second transmission path and send The data frame is read by the skip frame identifier, and the first transmission path data frame skip frame information is sent to the local transmission data processing unit; the transmission data processing unit is located at the receiving end, and is configured to send the user to the sending end. A data frame of the second transmission path of the data packet is added with a frame skip identifier. The data frame of the user data packet that is transmitted to the receiving end through the first transmission path is simultaneously transmitted on the second transmission path.

In the above solution, the receiving data processing unit is located at the receiving end, and is configured to continuously receive the data frame of the user data packet transmitted by the transmitting end of the preset frame number through the first transmission path, and send the first to the local sending data processing unit. The transmission path is stable; the data is transmitted at the transmitting end, and is used to receive the data frame transmitted by the second transmission path. If there is no frame skip identifier, the information of the first transmission path is sent to the local transmission data processing unit; a unit, located at the receiving end, configured to delete a frame skip identifier in a data frame transmitted to the transmitting end by using the second transmission path, and configured to stop data of the user data packet of the second transmission path for transmitting the first transmission path at the transmitting end frame.

In the above solution, the receiving data processing unit is further configured to: read the received data frame Frame number, if the frame number is repeated, delete the data frame whose frame number is repeated. When the transmission path is unstable, the sender simultaneously transmits the data of the first transmission path through the second transmission path, reduces the delay of the data transmission path when the data is skipped, improves the service quality, and improves the user experience; further, receiving When the first transmission path is unstable, the sender adds a frame skip identifier to the data frame transmitted in the second transmission path to notify the sender, and the response is fast, reducing the service interruption time, and improving service reliability. DRAWINGS

1 is a schematic diagram of a method for implementing data transmission in a ring network according to the present invention; FIG. 2 is a schematic diagram of data transmission in a ring network;

FIG. 3 is a schematic diagram of a system composition for implementing data transmission in a ring network according to the present invention. detailed description

The basic idea of the present invention is: the BSC and the BTS transmit a data frame of a user data packet from the first transmission path and the second transmission path through a ring network, and determine that the first transmission path is unstable, and the first transmission path is The data frame of the user data packet is simultaneously transmitted on the second transmission path, and the first transmission path is determined to be stable, and the data frame of the user data packet transmitted by the first transmission path is stopped in the second transmission path;

The user data packet includes a user plane message and a control plane message, where the user plane message includes voice data, and the control plane message includes various control signaling.

The present invention will be described in detail below through specific embodiments and the accompanying drawings. As shown in FIG. 1, a method for data transmission in a ring network is as follows:

Step 101: Transmit user data packets from the first transmission path and the second transmission path by using a ring network;

A user data packet is transmitted between the BTS and the BSC through a ring network. The transmission has two unique paths. The data stream is sent to the BSC by the BTS, and the BTS sends the user data packet to the BTS. In the ring network, there are two transmission paths between the BTS and the BSC for transmitting user data packets. As shown in Figure 2, taking BTS2 as an example, the BTS2 and the BSC pass the first transmission path BTS2. BTS1 - BSC and second transmission path BTS2 - BTS3 - BSC transmits user data messages; the group includes: user data messages are transmitted in a frame format, and each frame is numbered, according to the type of frame number respectively A transmission path and a second transmission path are transmitted, wherein when the type of the frame sequence includes an odd frame or an even frame, the odd frame may be transmitted in the first transmission path, and the even frame may be transmitted in the second transmission path; and vice versa. The number of users is implemented by a protocol with a sequence number of data frames for transmitting data.

When the first transmission path is stable, the first transmission path and the second transmission path are always transmitted to transmit user data packets. When the first transmission path is unstable, the subsequent steps are performed.

Step 102: Determine that the first transmission path is unstable, and transmit the data frame transmitted by the first transmission path through the second transmission path at the same time;

Receiving the user data packet, that is, the receiving party, determining that the first transmission path is unstable, such as the transmitted data frame hopping frame, and transmitting the data frame transmitted by the first transmission path through the second transmission path at the same time, the determining first The data frame skipped frame transmitted by the transmission path includes: a frame number of the received data frame received by the receiver, and if the frame sequence number is discontinuous, the frame number of the data frame transmitted by the first transmission path is absent, and the data frame transmitted by the first transmission path The data frame transmitted by the first transmission path is simultaneously transmitted through the second transmission path, including: the receiver adds the data frame that is transmitted to the party that sends the user data message, that is, the sender, through the second transmission path. a frame skipping identifier, the sender receives the data frame including the frame skipping identifier transmitted by the second transmission path, and the user data packet transmitted by the first transmission path while maintaining the data frame of the user data packet transmitted by the first transmission path The data frame is simultaneously transmitted to the receiver through the second transmission path.

Taking the data stream of the user data packet sent by the BTS by the BSC as an example, the BSC reads the BTS. The frame number of the transmitted data frame. If the frame number is not continuous, if the frame number of the received data frame is 1, 2, 4, the odd frame is absent, and the first transmission path transmits the odd frame, and the second transmission path transmits the even frame. Determining a data frame hopping frame transmitted by the first transmission path, the BSC adds a hop frame identifier in an even frame of the data stream that sends the user data packet to the BTS through the second transmission path, and the BTS receives the hop frame included in the second transmission path. The even frame of the identifier is read, the frame skip identifier in the even frame is read, and the odd frame of the user data message is transmitted through the first transmission path, and the second transmission path is

The BSC transmits odd and even frames of user data messages.

Step 103: Determine that the first transmission path is stable, and stop the data frame transmitted by the first transmission path from being transmitted through the second transmission path.

The determining that the first transmission path is stable specifically includes: receiving, by the receiving party, the data frame transmitted by the first transmission path by the preset number of frames of N frames, wherein the first transmission path is stable, where N may be set according to requirements; The data frame transmitted by the first transmission path is transmitted through the second transmission path, including: the receiver deletes the frame skip identifier of the data frame transmitted to the sender in the second transmission path, and the receiver receives the data frame transmitted by the second transmission path, if not The frame skip identifier stops the transmission of the data frame transmitted by the first transmission path through the second transmission path.

Taking the data stream of the user data packet transmitted by the BTS by the BSC as an example, if N is 3, the first transmission path transmits an odd frame, and the second transmission path should only transmit an even frame, but since the first transmission path is unstable, The second transmission path transmits all the data frames; if the BSC continuously receives the odd frames of the 3 frames of the first transmission path, it is determined that the first transmission path is stable, and the BSC deletes the even frames transmitted by the second transmission path of the BTS transmission user data message. In the frame skipping identifier, the BTS receives the even frame of the user data packet sent by the second transmission path, and if there is no frame skipping identifier, stops transmitting the odd frame through the second transmission path, that is, the first transmission path continues to transmit the odd frame, The second transmission path only transmits even frames.

To prevent the message from being repeated, the BTS and the BSC receive the data frame of the user data message transmitted by the other party, read the frame number of the data frame, and delete the data frame whose frame number is repeated. Based on the above method, the present invention further provides a data transmission system in a ring network. As shown in FIG. 3, the system includes: a receiving data processing unit 301, a sending data processing unit 302, wherein the receiving data processing unit 301 sends The data processing unit 302 can be located at the receiving end or at the transmitting end, the receiving end is a BSC or a BTS, and correspondingly the transmitting end is a BTS or a BSC; there are two independent data streams between the receiving end and the transmitting end, A data stream is transmitted to the BSC for the BTS, and is transmitted through the first transmission path and the second transmission path, and one data stream is transmitted to the BTS by the BSC, and is transmitted through the first transmission path and the second transmission path;

The receiving data processing unit 301 is located at the receiving end, and is configured to receive the user data packet sent by the sending data processing unit 302 from the first transmission path and the second transmission path, and determine that the first transmission path is unstable in transmission, and request the sending data processing unit 302. Transmitting, by the second transmission path, the data frame of the user data packet transmitted by the first transmission path;

The sending data processing unit 302 is located at the transmitting end, and is configured to respectively transmit user data messages from the first transmission path and the second transmission path according to the type of the frame number of the data frame; when the first transmission path is unstable, the first transmission path is transmitted. And transmitting, by the second transmission path, the data frame of the user data packet transmitted by the first transmission path, where the type of the frame sequence includes an odd frame or an even frame, and the first transmission path may be transmitted. Odd frames, the second transmission path transmits even frames; vice versa;

The receiving data processing unit 301 is located at the receiving end, and is specifically configured to: read a frame number of the data frame of the received user data packet, and if the frame sequence number is discontinuous, the data frame transmitted by the first transmission path is absent, and the data frame skips, The first transmission path is unstable, and the information of the data frame skipped frame transmitted by the first transmission path is sent to the sending data processing unit 302 of the receiving end, where the information of the data frame skipping frame includes a transmission path and a frame serial number type, where the frame The type of the serial number refers to an odd frame and an even frame.

The sending data processing unit 302 is located at the receiving end, and is configured to receive information of a data frame skipped frame sent by the receiving data processing unit 301 of the receiving end, add a frame skipping identifier to the data frame transmitted by the second transmission path, and send the frame skipping identifier to the transmitting end. Receiving data processing unit 301; The transmitting end is configured to transmit a data frame of the user data packet by using the first transmission path, and is also transmitted by using the second transmission path;

Correspondingly, the receiving data processing unit 301 is located at the transmitting end, and is configured to receive the data frame transmitted by the second transmission path, read the frame skip identifier therein, and send the information of the data frame skip frame to the local sending data processing unit 302.

The receiving data processing unit 301 is located at the receiving end, and is further configured to continuously receive the preset frame number 数据 the data frame sent by the frame sending data processing unit 302 through the first transmission path, determine that the first transmission path is stable, and stabilize the first transmission path. The information is sent to the sending data processing unit 302 of the receiving end;

The transmitting end is configured to receive the data frame transmitted by the second transmission path, and send the information that the first transmission path is stable to the local sending data processing unit 302;

The sending data processing unit 302 is located at the receiving end, and is further configured to: receive the first transmission path stable information, delete the frame skip identifier in the data frame transmitted by the second transmission path, and send the data to the receiving data processing unit 301 of the sending end;

The transmitting end is configured to stop the data frame of the user data packet transmitted on the first transmission path in the second transmission path.

The receiving data processing unit 301 is further configured to: read a frame number of the data frame, and delete the data frame whose frame number is repeated.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included. Within the scope of protection of the present invention.

Claims

Claim

A method for data transmission in a ring network, characterized in that:

The method according to claim 1, wherein the determining that the first transmission path is unstable comprises: reading a frame number of a data frame of the received user data packet, if the frame sequence number is discontinuous, the first frame is missing The data frame transmitted by the transmission path is skipped by the data frame transmitted by the first transmission path, and the first transmission path is determined to be unstable.

The method of claim 1, wherein the simultaneously transmitting the user data message transmitted by the first transmission path through the second transmission path comprises:

The receiver adds a hop frame identifier to the data frame of the second transmission path sent to the sender, and the sender receives the data frame including the hop frame identifier transmitted by the second transmission path, and transmits the data frame to the receiver through the first transmission path. The data frame of the data message is transmitted simultaneously on the second transmission path.

The method according to claim 1, wherein the method further comprises: determining that the first transmission path is stable, deleting a frame skip identifier in a data frame of the second transmission path sent to the sender, and the sender receiving the The data frame transmitted by the second transmission path stops transmitting the data frame of the user data message transmitted by the first transmission path through the second transmission path.

The method according to any one of claims 2 to 4, characterized in that the method further comprises:

Query the frame number of the data frame of the received user data packet, and delete the data frame with the repeated frame number.

A system for data transmission in a ring network, comprising: a receiving data processing unit and a sending data processing unit; wherein The receiving data processing unit is located at the receiving end, and is configured to receive, by the sending data processing unit of the transmitting end, the user data packet transmitted by the first transmission path and the second transmission path, determining that the first transmission path is unstable, and requesting the sending data processing unit of the transmitting end Simultaneously transmitting user data messages transmitted by the first transmission path from the second transmission path;

7. The system of claim 6 wherein:

The receiving data processing unit is specifically configured to: read a frame number of a data frame of the received user data packet, and if the frame sequence number is discontinuous, and the data frame transmitted by the first transmission path is absent, the data frame transmitted by the first transmission path The frame is skipped to determine that the first transmission path is unstable.

8. The system of claim 6 wherein:

The receiving data processing unit is located at the receiving end, and is configured to send the data frame skipping frame information transmitted by the first transmission path to the local sending data processing unit; at the transmitting end, to receive the data frame sent by the second transmission path, Reading the frame skip identifier, and transmitting the first transmission path data frame skip frame information to the local sending data processing unit;

The sending data processing unit is located at the receiving end, and is configured to add a frame skipping identifier to the data frame of the second transmission path that sends the user data packet to the sending end, and is located at the sending end, and is configured to transmit to the first transmission path The data frame of the user data message at the receiving end is simultaneously transmitted on the second transmission path.

9. The system of claim 6 wherein:

The receiving data processing unit is located at the receiving end, and is configured to continuously receive the data frame of the user data packet transmitted by the transmitting end of the preset number of frames through the first transmission path, and send the first transmission path to the local sending data processing unit. Information; is located at the sending end, and is configured to receive a data frame transmitted by the second transmission path, and if there is no frame skip identifier, send the information of the first transmission path to the local Transmit data processing unit;

The sending data processing unit is located at the receiving end, configured to delete a frame skipping identifier in a data frame transmitted to the transmitting end by using the second transmission path, and is located at the sending end, and is configured to stop the user of the second transmission path transmitting the first transmission path The data frame of the data message.

10. A system according to any of claims 7 to 9, characterized in that

The receiving data processing unit is further configured to: read a frame number of the received data frame, and if the frame number is repeated, delete the data frame whose frame number is repeated.