CN103581926A - Method and device for achieving compatibility of multiple networking modes - Google Patents

Abstract

The present invention provides a method and device for realizing the compatibility of various networking modes. The method includes: determining the currently applied networking mode according to the networking mode selection instruction input by the user; The IQ data and the control word sent by the public radio interface (CPRI); the selected control word is analyzed to obtain the synchronous control signal and the synchronous frame header of the synchronous control signal, and according to the synchronous frame header, the selected IQ data is binary Deframe for the second time, and synchronize the data of each carrier of IQ data to the downlink; perform delay compensation for each carrier of IQ data sent through the uplink; send the IQ data after delay compensation and CPRI interface According to the communication standard supported by the distributed base station, the incoming IQ data is subjected to secondary framing and carrier routing; the IQ data after carrier routing is selected, and the selected IQ data is sent to the CPRI interface, and the RRU and carrier can be realized by using the present invention. BBUs are compatible with multiple networking modes.

Description

A method and device for realizing compatibility of multiple networking modes

technical field

The invention relates to a distributed base station in a communication system, in particular to a method and a device for realizing the compatibility of multiple networking modes.

Background technique

The third generation mobile communication system adopts a distributed base station, and the distributed base station includes a baseband unit (Baseband Unit, BBU) and a remote radio unit (Remote Radio Unit, RRU) connected by an optical fiber or a cable, and the BBU and the RRU can be Long distance separation setting.

The interface between the BBU and the RRU can be the Common Public Radio Interface (The Common Public Radio Interface, CPRI) or the interface between the RRU and the BBU (Interface between the RRU and the BBU, IR). The networking mode between the RRU and the BBU can adopt active/standby mode, cascade mode or load sharing mode.

The main-standby mode, as shown in Figure 1, means that a BBU is connected to an RRU through two pairs of different optical fibers, and the BBU transmits the same data to the two optical fibers at the same time, and the RRU normally only processes the data of a pair of optical fibers , when a pair of optical fiber links is abnormal, the system can automatically switch to another pair of optical fibers for communication without guaranteeing that the call is not dropped, so the reliability of the system using the active and standby mode is high. The pair of optical fibers refers to two optical fibers with different communication directions.

The cascading mode, as shown in FIG. 2 , means that one BBU is connected to two or more RRUs through a pair of optical fibers, and each RRU communicates with the BBU according to the serial number assigned by the network. Systems using cascade mode cover a wide range.

The load sharing mode, as shown in Figure 3, means that one BBU is connected to one RRU through two different pairs of optical fibers, or two BBUs are connected to one RRU through two different pairs of optical fibers. The content transmitted by these two pairs of optical fibers is different. The system adopting the load sharing mode can make full use of the processing capability of the RRU, so the system utilization rate is high.

At present, the RRU and the BBU cannot be compatible with multiple networking modes, but only one can be selected, and the cascading mode is generally adopted. In this way, when the reliability of the system is required to be high, it is necessary to change the networking mode between the RRU and the BBU from the cascade mode to the active/standby mode; when the system utilization is required to be high, it is necessary to change the RRU The networking mode with the BBU is changed from cascade mode to load sharing mode. Changing the networking mode between RRU and BBU requires reconfiguration of distributed base stations, which will not only cause configuration errors due to complex operations, which will affect the normal operation of the system, but will also increase the cost of system operation.

Contents of the invention

In view of this, the main purpose of the present invention is to provide a method and device for realizing compatibility of multiple networking modes, which can realize compatibility between RRU and BBU for multiple networking modes, avoid reconfiguration of distributed base stations, and reduce system cost. operating costs.

In order to achieve the above object, technical solution of the present invention is achieved in that way:

The present invention provides a method for realizing the compatibility of various networking modes, based on a remote radio unit (RRU) of a distributed base station, the method includes:

Determine the currently applied networking mode according to the networking mode selection command input by the user;

According to the determined networking mode, select the IQ data and control words sent by the Common Public Radio Interface (CPRI);

Analyzing the selected control word to obtain the synchronous control signal and the synchronous frame header of the synchronous control signal, and carrying out secondary deframing of the selected IQ data according to the communication standard supported by the synchronous frame header and the distributed base station, and The data of each carrier of the IQ data is synchronized and sent to the downlink;

Perform delay compensation for each carrier of IQ data sent through the uplink, so that the data of each carrier is synchronized;

For the IQ data after delay compensation and the IQ data sent by the CPRI interface, perform secondary framing and carrier routing according to the communication standards supported by the distributed base station;

Select the IQ data after carrier routing, and send the selected IQ data to the CPRI interface.

Preferably, according to the determined networking mode, selecting the IQ data and control words sent by the Common Public Radio Interface (CPRI) is,

When the determined networking mode is active/standby mode, from the two sets of identical IQ data and control words sent from the CPRI interface, select a set of IQ data and control words according to the default configuration;

When the determined networking mode is the cascading mode, select the IQ data and control words corresponding to the RRU of the current level from the IQ data and control words sent by the CPRI interface;

When the determined networking mode is the load sharing mode, two different sets of IQ data and control words are all selected.

Preferably, the secondary deframing of the selected IQ data according to the synchronization frame header and the communication standard supported by the distributed base station is,

When the communication standard supported by the distributed base station is GSM, the selected IQ data is deframed twice according to the 10ms frame header and the 3 chip (chip) header of the synchronous control signal;

When the communication standard supported by the distributed base station is UMTS or LTE, the selected IQ data is deframed twice according to the 10ms frame header of the synchronization control signal;

When the communication standard supported by the distributed base station is CDMA, the selected IQ data is deframed twice according to the 10ms frame header and 6chip header of the synchronous control signal.

Preferably, the secondary framing according to the communication standard supported by the distributed base station is,

When the communication standard supported by the distributed base station is GSM, the IQ data is reframed according to the 60ms frame header of the synchronous control signal;

When the communication standard supported by the distributed base station is UMTS, LTE or CDMA, secondary framing is performed on the IQ data according to the 10 ms frame header of the synchronization control signal.

Preferably, said performing carrier routing is,

When the communication standard supported by the distributed base station is UMTS or LTE, the IQ data after secondary framing is carried out carrier routing according to the chip header of the synchronization control signal;

When the communication standard supported by the distributed base station is CDMA, carrier routing is performed on the IQ data after secondary framing according to the 6chip header of the synchronization control signal.

Preferably, the selection of the IQ data after carrier routing is,

When the determined networking mode is active/standby mode, a set of IQ data after carrier routing is generated to generate two sets of identical IQ data;

When the determined networking mode is cascade mode, directly select a set of IQ data after carrier routing;

When the determined networking mode is the load sharing mode, all two sets of different IQ data after carrier routing are selected.

The present invention provides a device for realizing the compatibility of multiple networking modes, based on the remote radio unit (RRU) of the distributed base station, the device includes: a central processing unit (CPU), a downlink selection module, and a downlink synchronous deframing module , a downlink alignment delay module, an uplink alignment delay module, an uplink synchronous framing module and an uplink selection module; wherein,

The CPU is configured to determine a currently applied networking mode according to a networking mode selection instruction input by a user;

The downlink selection module is used to select IQ data and control words sent by the common public radio interface (CPRI) according to the determined networking mode;

The downlink synchronous deframing module is used to analyze the selected control word, obtain the synchronous control signal and the synchronous frame header of the synchronous control signal, and perform the selected synchronous frame header and the communication standard supported by the distributed base station according to the synchronous frame header and the communication standard supported by the distributed base station The IQ data is deframed twice;

The downlink alignment delay module is used to synchronize each carrier data of the IQ data and send it to the downlink;

The uplink alignment delay module is used to perform delay compensation for each carrier of the IQ data sent through the uplink, so that the data of each carrier is synchronized;

The uplink synchronous framing module is used to perform secondary framing and carrier routing for the IQ data after delay compensation and the IQ data sent by the CPRI interface according to the communication standard supported by the distributed base station;

The uplink selection module is used to select the IQ data routed by the carrier, and send the selected IQ data to the CPRI interface.

Preferably, the downlink selection module is specifically configured to:

When the networking mode determined by the CPU is the active/standby mode, a group of IQ data and control words are selected according to the default configuration from two groups of identical IQ data and control words sent from the CPRI interface;

When the networking mode determined by the CPU is a cascading mode, select the IQ data and the control word corresponding to the RRU of this level from the IQ data and the control word sent by the CPRI interface;

When the networking mode determined by the CPU is the load sharing mode, two different sets of IQ data and control words are all selected.

Preferably, the downlink synchronous deframing module is specifically used to:

When the communication standard supported by the distributed base station is GSM, the selected IQ data is deframed twice according to the 10ms frame header and the 3 chip (chip) header of the synchronous control signal;

When the communication standard supported by the distributed base station is UMTS or LTE, the selected IQ data is deframed twice according to the 10ms frame header of the synchronization control signal;

When the communication standard supported by the distributed base station is CDMA, the selected IQ data is deframed twice according to the 10ms frame header and 6chip header of the synchronous control signal.

Preferably, the uplink synchronous framing module is specifically used to:

When the communication standard supported by the distributed base station is GSM, the IQ data is reframed according to the 60ms frame header of the synchronous control signal;

When the communication standard supported by the distributed base station is UMTS, LTE or CDMA, secondary framing is performed on the IQ data according to the 10 ms frame header of the synchronization control signal.

Preferably, the uplink synchronous framing module is specifically used to:

When the communication standard supported by the distributed base station is UMTS or LTE, the IQ data after secondary framing is carried out carrier routing according to the chip header of the synchronization control signal;

When the communication standard supported by the distributed base station is CDMA, carrier routing is performed on the IQ data after secondary framing according to the 6chip header of the synchronization control signal.

Preferably, the uplink selection module is specifically configured to:

When the networking mode determined by the CPU is the active/standby mode, generating two sets of identical IQ data from a set of IQ data after carrier routing;

When the networking mode determined by the CPU is a cascade mode, directly select a set of IQ data after carrier routing;

When the networking mode determined by the CPU is the load sharing mode, all two groups of different IQ data after carrier routing are selected.

As can be seen from the above, the technical solution of the present invention is adopted: according to the networking mode selection command input by the user, the current application networking mode is determined; according to the determined networking mode, the IQ data and the control word sent by the CPRI interface are selected; The control words of the control word are analyzed to obtain the synchronous control signal and the synchronous frame header of the synchronous control signal, and according to the synchronous frame header and the communication standard supported by the distributed base station, the selected IQ data is deframed twice, and the IQ data is The carrier data of each carrier is synchronized and then sent to the downlink; the delay compensation is performed for each carrier of the IQ data sent through the uplink, so that the data of each carrier is synchronized; the IQ data after delay compensation and the CPRI interface For IQ data, secondary framing and carrier routing are performed according to the communication standards supported by the distributed base station; the IQ data after carrier routing is selected, and the selected IQ data is sent to the CPRI interface, thus, the connection between RRU and BBU can be realized Compatible with multiple networking modes, you can switch the networking mode as needed without changing the networking mode, thereby avoiding reconfiguration of distributed base stations and reducing system operation costs.

Description of drawings

FIG. 1 is a schematic structural diagram of a distributed base station when the networking mode between the RRU and the BBU is in the active/standby mode;

FIG. 2 is a schematic structural diagram of a distributed base station when the networking mode between the RRU and the BBU is a cascade mode;

FIG. 3 is a schematic structural diagram of a distributed base station when the networking mode between the RRU and the BBU is a load sharing mode;

FIG. 4 is a flowchart of a first embodiment of a method for realizing compatibility of multiple networking modes provided by the present invention;

FIG. 5 is a schematic structural diagram of an embodiment of a device for realizing compatibility of multiple networking modes provided by the present invention;

FIG. 6 is a flowchart of a second embodiment of a method for realizing compatibility of multiple networking modes provided by the present invention;

FIG. 7 is a schematic diagram of the flow of data in the device of the present invention when the networking mode determined by the CPU is the active/standby mode;

FIG. 8 is a schematic diagram of the flow of data in the device of the present invention when the networking mode determined by the CPU is a cascade mode;

FIG. 9 is a schematic diagram of data flow in the device of the present invention when the networking mode determined by the CPU is the load sharing mode.

Detailed ways

The basic idea of the present invention is: according to the networking mode selection command input by the user, determine the currently applied networking mode; according to the determined networking mode, select the IQ data and the control word sent by the CPRI interface; Analyzing, obtaining the synchronous control signal and the synchronous frame header of the synchronous control signal, and carrying out secondary deframing of the selected IQ data according to the communication standard supported by the synchronous frame header and the distributed base station, and deframing each carrier data of the IQ data After synchronization, it is sent to the downlink; delay compensation is performed on each carrier of the IQ data sent through the uplink, so that the data of each carrier is synchronized; for the IQ data after delay compensation and the IQ data sent by the CPRI interface, according to The communication standard supported by the distributed base station performs secondary framing and carrier routing; selects the IQ data after carrier routing, and sends the selected IQ data to the CPRI interface.

The present invention provides a method for realizing the compatibility of various networking modes. Based on the RRU of the distributed base station, the interface between the RRU and the BBU adopts the CPRI interface, as shown in FIG. A first embodiment of a method for network mode compatibility includes the following steps:

Among them, the downstream steps include:

Step 401: Determine the currently applied networking mode according to the networking mode selection command input by the user;

Step 402, according to the determined networking mode, select the IQ data and the control word sent by the CPRI interface;

Step 403, analyze the selected control word, obtain the synchronous control signal and the synchronous frame header of the synchronous control signal, and perform secondary deframing of the selected IQ data according to the synchronous frame header and the communication standard supported by the distributed base station , and send the data of each carrier of the IQ data to the downlink after synchronization;

Among them, the uplink steps include:

Step 404, performing delay compensation for each carrier of the IQ data sent through the uplink, so that the data of each carrier is synchronized;

Step 405: For the IQ data after delay compensation and the IQ data sent by the CPRI interface, perform secondary framing and carrier routing according to the communication standard supported by the distributed base station;

Step 406: Select the IQ data after carrier routing, and send the selected IQ data to the CPRI interface.

Preferably, in the step 402, according to the determined networking mode, select the IQ data and the control word sent by the CPRI interface, which can be,

When the determined networking mode is active/standby mode, from the two sets of identical IQ data and control words sent from the CPRI interface, select a set of IQ data and control words according to the default configuration;

When the determined networking mode is the cascading mode, select the IQ data and control words corresponding to the RRU of the current level from the IQ data and control words sent by the CPRI interface;

When the determined networking mode is the load sharing mode, two different sets of IQ data and control words are all selected.

Preferably, in the step 403, according to the synchronization frame header and the communication standard supported by the distributed base station, the selected IQ data is deframed twice, which can be,

When the communication standard supported by the distributed base station is GSM, the selected IQ data is deframed twice according to the 10ms frame header and the 3 chip (chip) header of the synchronous control signal;

When the communication standard supported by the distributed base station is UMTS or LTE, the selected IQ data is deframed twice according to the 10ms frame header of the synchronization control signal;

When the communication standard supported by the distributed base station is CDMA, the selected IQ data is deframed twice according to the 10ms frame header and 6chip header of the synchronous control signal.

Preferably, in step 405, secondary framing is performed according to the communication standard supported by the distributed base station, which may be:

When the communication standard supported by the distributed base station is GSM, the IQ data is framed twice according to the 60ms frame header of the synchronous control signal;

When the communication standard supported by the distributed base station is UMTS, LTE or CDMA, secondary framing is performed on the IQ data according to the 10 ms frame header of the synchronization control signal.

Preferably, the carrier routing in step 405 may be,

When the communication standard supported by the distributed base station is UMTS or LTE, the IQ data after secondary framing is carried out carrier routing according to the chip header of the synchronization control signal;

When the communication standard supported by the distributed base station is CDMA, carrier routing is performed on the IQ data after secondary framing according to the 6chip header of the synchronization control signal.

Preferably, in the step 406, the IQ data after carrier routing is selected, which may be,

When the determined networking mode is active/standby mode, a set of IQ data after carrier routing is generated to generate two sets of identical IQ data;

When the determined networking mode is cascade mode, directly select a set of IQ data after carrier routing;

When the determined networking mode is the load sharing mode, all two sets of different IQ data after carrier routing are selected.

The present invention provides a device for realizing the compatibility of various networking modes. Based on the RRU of the distributed base station, the interface between the RRU and the BBU adopts the CPRI interface, as shown in FIG. The embodiments of the network mode compatible device include: a central processing unit (Central Processing Unit, CPU), a downlink selection module, a downlink synchronous deframing module, a downlink alignment delay module, an uplink alignment delay module, an uplink synchronous framing module and an uplink selection module; among them,

The CPU is configured to determine a currently applied networking mode according to a networking mode selection instruction input by a user;

The downlink selection module is used to select the IQ data and control words sent by the CPRI interface according to the determined networking mode;

The downlink synchronous deframing module is used to analyze the selected control word, obtain the synchronous control signal and the synchronous frame header of the synchronous control signal, and perform the selected synchronous frame header and the communication standard supported by the distributed base station according to the synchronous frame header and the communication standard supported by the distributed base station The IQ data is deframed twice;

The downlink alignment delay module is used to synchronize each carrier data of the IQ data and send it to the downlink;

The uplink alignment delay module is used to perform delay compensation for each carrier of the IQ data sent through the uplink, so that the data of each carrier is synchronized;

The uplink synchronous framing module is used to perform secondary framing and carrier routing for the IQ data after delay compensation and the IQ data sent by the CPRI interface according to the communication standard supported by the distributed base station;

The uplink selection module is used to select the IQ data routed by the carrier, and send the selected IQ data to the CPRI interface.

Preferably, the downlink selection module can be specifically used for:

When the networking mode determined by the CPU is the active/standby mode, a group of IQ data and control words are selected according to the default configuration from two groups of identical IQ data and control words sent from the CPRI interface;

When the networking mode determined by the CPU is a cascading mode, select the IQ data and the control word corresponding to the RRU of this level from the IQ data and the control word sent by the CPRI interface;

When the networking mode determined by the CPU is the load sharing mode, two different sets of IQ data and control words are all selected.

Preferably, the downlink synchronous deframing module can be specifically used for:

When the communication standard supported by the distributed base station is GSM, the selected IQ data is deframed twice according to the 10ms frame header and 3chip header of the synchronous control signal;

When the communication standard supported by the distributed base station is UMTS or LTE, the selected IQ data is deframed twice according to the 10ms frame header of the synchronization control signal;

When the communication standard supported by the distributed base station is CDMA, the selected IQ data is deframed twice according to the 10ms frame header and 6chip header of the synchronous control signal.

Preferably, the uplink synchronous framing module can be specifically used for:

When the communication standard supported by the distributed base station is GSM, the IQ data is framed twice according to the 60ms frame header of the synchronous control signal;

When the communication standard supported by the distributed base station is UMTS, LTE or CDMA, secondary framing is performed on the IQ data according to the 10 ms frame header of the synchronization control signal.

Preferably, the uplink synchronous framing module can be specifically used for:

When the communication standard supported by the distributed base station is UMTS or LTE, carrier routing is performed on the IQ data according to the chip header of the synchronization control signal;

When the communication standard supported by the distributed base station is CDMA, carrier routing is performed on the IQ data according to the 6chip header of the synchronization control signal.

Preferably, the uplink selection module can be specifically used for:

When the networking mode determined by the CPU is the active/standby mode, generating two sets of identical IQ data from a set of IQ data after carrier routing;

When the networking mode determined by the CPU is a cascade mode, directly select a set of IQ data after carrier routing;

When the networking mode determined by the CPU is the load sharing mode, all two groups of different IQ data after carrier routing are selected.

The second embodiment of the method for realizing the compatibility of multiple networking modes of the present invention is introduced below. In this embodiment, the interface between the BBU and the RRU adopts the CPRI interface, including the first interface CPRI0 and the second interface CPRI1, as shown in the figure As shown in 6, the method for this implementation comprises the following steps:

Among them, the downstream steps include:

Step 601, according to the networking mode selection instruction input by the user, the CPU determines the currently applied networking mode.

Specifically, when the networking mode selection instruction input by the user is to select the active/standby mode, the CPU determines that the active/standby mode is the currently applied networking mode;

When the networking mode selection instruction input by the user is to select the cascading mode, the CPU determines that the cascading mode is the currently applied networking mode;

When the networking mode selection instruction input by the user is to select the load sharing mode, the CPU determines that the load sharing mode is the currently applied networking mode.

Step 602: According to the networking mode determined by the CPU, the first interface CPRI0 and/or the second interface CPRI1 analyze the received data packets to obtain downlink IQ data, control words and signaling.

Specifically, when the networking mode determined by the CPU is the active/standby mode, as shown in FIG. 7, CPRI0 and CPRI1 each receive the same data packets sent by a group of BBUs, and analyze the received data packets respectively, Obtain two sets of identical IQ data, control words and signaling;

When the networking mode determined by the CPU is the cascading mode, as shown in Figure 8, CPRI0 or CPRI1 receives the data packet sent by the BBU, and analyzes the received data packet to obtain IQ data, control word and signal make.

If CPRI0 receives the data packet from the BBU, CPRI0 is connected to the BBU, CPRI0 is used as the uplink interface, and CPRI1 is used as the downlink interface to connect to the lower-level RRU; if CPRI1 receives the data packet from the BBU, CPRI1 is connected to the BBU , CPRI1 is used as an uplink interface, and CPRI0 is used as a downlink interface to connect to the lower-level RRU. In this embodiment, CPRI0 receives a data packet from the BBU, CPRI0 is used as an uplink interface, and CPRI1 is used as a downlink interface, as shown in FIG. 8 , and the lower-level RRU is RRU2.

When the networking mode determined by the CPU is the load sharing mode, as shown in FIG. 9, CPRI0 and CPRI1 each receive a group of data packets, and the two groups of data packets are different data packets sent by one BBU or two different BBUs. and analyze the received data packets respectively to obtain two different sets of IQ data, control words and signaling.

Step 603, according to the networking mode determined by the CPU, the downlink selection module selects the IQ data, control words and signaling parsed by CPRI0 and/or CPRI1;

Specifically, when the networking mode determined by the CPU is the active/standby mode, as shown in FIG. A set of IQ data, control words and signaling, and send the selected signaling to the CPU;

When the networking mode determined by the CPU is the cascading mode, the downlink selection module selects the RRU corresponding to the current level from the parsed IQ data, control words and signaling (see Figure 8, the current level in this embodiment The RRU is the IQ data, control word and signaling of the RRU1) serial number, and forwards the received IQ data, control word and signaling to the lower-level RRU through the downlink interface;

When the networking mode determined by the CPU is the load sharing mode, as shown in FIG. 9, the downlink selection module selects all two groups of different IQ data, control words and signaling, and sends the IQ data to the downlink synchronous deframing module, Send the control word to the CPU, and send two sets of different signaling to the CPU after scheduling and processing in a time-division multiplexed manner.

Step 604, the downlink synchronous deframing module analyzes the control word selected by the downlink selection module, obtains the synchronization control signal and the synchronization frame header of the synchronization control signal, and performs secondary processing on the IQ data selected by the downlink selection module according to the synchronization frame header unframe;

Specifically, when the communication standard supported by the distributed base station is GSM, the downlink synchronous deframing module performs secondary deframing processing on the selected IQ data according to the 10ms frame header and 3chip header of the synchronous control signal obtained by its own analysis;

When the communication standards supported by the distributed base station are UMTS and LTE, the downlink synchronous deframing module performs secondary deframing processing on the selected IQ data according to the 10ms frame header of the synchronous control signal obtained by its own analysis;

When the communication standard supported by the distributed base station is CDMA, the downlink synchronous deframing module performs secondary deframing processing on the selected IQ data according to the 10ms frame header and 6chip header of the synchronous control signal obtained by its own analysis;

Deframing the IQ data twice is for more efficient use of the transmission bandwidth.

In step 605, the downlink synchronous deframing module performs carrier routing on the IQ data after secondary deframing.

Step 606 , the downlink alignment delay module performs delay compensation on each carrier of the IQ number after the carrier routing of the downlink synchronization deframing module, so that the data of each carrier is synchronized, and sends the delay compensated IQ data through the downlink.

Among them, the uplink steps include:

Step 607: According to the networking mode determined by the CPU, the uplink alignment delay module performs delay compensation on each carrier of the uplink IQ data sent through the uplink, so that each carrier of the IQ data is synchronized;

Specifically, when the networking mode determined by the CPU is the active/standby mode, as shown in FIG. 7, the uplink alignment delay module performs carrier delay compensation for each carrier of a set of IQ data sent through the uplink;

When the networking mode determined by the CPU is the cascading mode, as shown in FIG. 8, the uplink alignment delay module performs carrier delay compensation on each carrier of a group of uplink IQ data sent through the uplink;

When the networking mode determined by the CPU is the load sharing mode, as shown in FIG. 9 , the uplink alignment delay module performs delay compensation on each carrier of two groups of different IQ data sent through the uplink, and obtains Two different sets of IQ data.

Step 608, the uplink synchronous framing module performs secondary framing processing on the IQ data after the delay compensation of the uplink alignment delay module and the IQ data sent by the CPRI1 interface;

Here, when the networking mode determined by the CPU is active/standby mode and load sharing mode, as shown in FIG. 7 and FIG. 9, the uplink synchronous framing module performs two Secondary framing processing.

When the networking mode determined by the CPU is the cascading mode, as shown in FIG. 8, the uplink synchronous framing module performs a secondary process on the IQ data after the delay compensation of the uplink alignment delay module and the IQ data sent by the CPRI1 interface. Framing processing.

Specifically, when the communication standard supported by the distributed base station is GSM, the uplink synchronous framing module performs a second execution on the IQ data corresponding to the control word according to the 60ms frame header of the synchronous control signal obtained by the analysis of the downlink synchronous deframing module. Framing processing;

When the communication standard supported by the distributed base station is UMTS, LTE or CDMA, the uplink synchronous framing module performs secondary framing on the IQ data corresponding to the control word according to the 10ms frame header of the synchronous control signal selected by the downlink selection module deal with.

Step 609, the uplink synchronous framing module performs carrier routing on the IQ data after secondary framing;

Specifically, when the communication standard supported by the distributed base station is GSM, the uplink synchronous framing module performs carrier routing on the IQ data according to the 3chip header of the control word selected by the downlink selection module;

When the communication standard supported by the distributed base station is UMTS or LTE, the uplink synchronous framing module performs carrier routing on the IQ data according to the chip header of the control word selected by the downlink selection module;

When the communication standard supported by the distributed base station is CDMA, the uplink synchronous framing module performs carrier routing for the IQ data according to the 6chip header of the control word selected by the downlink selection module.

Step 610, according to the networking mode determined by the CPU, the uplink selection module selects the received control word, signaling, and the IQ data after the carrier routing of the uplink synchronous framing module, and then sends it to CPRI0 and/or CPRI1;

Specifically, when the networking mode determined by the CPU is active/standby mode, the uplink selection module generates two groups of identical Control words, signaling and IQ data are sent to CPRI0 and CPRI1 respectively;

When the networking mode determined by the CPU is the cascading mode, the uplink selection module sends a group of IQ data after the carrier routing of the uplink synchronous framing module to the uplink interface CPRI0, and sends the control word of the current level RRU and the lower level RRU The incoming control words are sent to the uplink interface by combining or time-division multiplexing, and the signaling of the current level RRU and the signaling sent by the lower level RRU are reasonably scheduled so that the sum of the two signaling rates is not greater than CPRI The maximum interface rate supported, and the scheduled signaling is sent to the uplink interface;

When the networking mode determined by the CPU is the load sharing mode, the uplink selection module sends two different sets of IQ data after receiving two different control words, signaling, and uplink synchronous framing module carrier routing to the CPRI0 and CPRI1.

Step 611, CPRI0 and/or CPRI1 frame the received IQ data, control word and signaling to form a data packet, and send the data packet;

Specifically, when the networking mode determined by the CPU is the main/standby mode, as shown in FIG. Send the data packet to the BBU;

When the networking mode determined by the CPU is the cascading mode, as shown in FIG. Sent to BBU;

When the networking mode determined by the CPU is the load sharing mode, as shown in Figure 9, CPRI0 and CPRI1 respectively perform framing processing on the received IQ data, control words and signaling to form data packets, and respectively The data packet is sent to the first BBU (BBU0) and the second BBU (BBU1).

The above descriptions are only preferred embodiments of the present invention, and are not intended to limit the protection scope of the present invention.

Claims (12)

1. A method for realizing compatibility of multiple networking modes is based on a Radio Remote Unit (RRU) of a distributed base station, and is characterized in that the method comprises the following steps:

determining a networking mode of current application according to a networking mode selection instruction input by a user;

selecting IQ data and control words sent by a Common Public Radio Interface (CPRI) according to the determined networking mode;

analyzing the selected control word to obtain a synchronous control signal and a synchronous frame header of the synchronous control signal, performing secondary de-framing on the selected IQ data according to the synchronous frame header and a communication standard supported by the distributed base station, and synchronizing and then sending each carrier data of the IQ data to a downlink;

carrying out delay compensation on each carrier of IQ data transmitted through an uplink to synchronize the data of each carrier;

performing secondary framing and carrier routing on the IQ data subjected to delay compensation and the IQ data transmitted from the CPRI interface according to a communication standard supported by the distributed base station;

and selecting the IQ data after carrier routing, and sending the selected IQ data to the CPRI interface.

2. The method of claim 1, wherein said IQ data and control words from a Common Public Radio Interface (CPRI) are selected according to the determined networking mode, and are,

when the determined networking mode is the main/standby mode, selecting one group of IQ data and control words from two groups of same IQ data and control words sent from the CPRI interface according to default configuration;

when the determined networking mode is a cascade mode, selecting IQ data and control words corresponding to the RRU of the current stage from IQ data and control words sent from a CPRI interface;

when the determined networking mode is a load sharing mode, two groups of different IQ data and control words are all selected.

3. The method of claim 1, wherein the second deframing of the selected IQ data is performed according to the communication standard supported by the synchronization frame header and the distributed base station,

when the communication standard supported by the distributed base station is GSM, performing secondary deframing on the selected IQ data according to a 10ms frame header and a 3chip (chip) header of a synchronous control signal;

when the communication standard supported by the distributed base station is UMTS or LTE, performing secondary de-framing on the selected IQ data according to a 10ms frame header of the synchronous control signal;

and when the communication standard supported by the distributed base station is CDMA, performing secondary de-framing on the selected IQ data according to a 10ms frame header and a 6chip header of the synchronous control signal.

4. The method of claim 1, wherein the secondary framing is performed according to a communication standard supported by a distributed base station by,

when the communication standard supported by the distributed base station is GSM, performing secondary framing on the IQ data according to a 60ms frame head of the synchronous control signal;

when the communication standard supported by the distributed base station is UMTS, LTE or CDMA, secondary framing is carried out on the IQ data according to the 10ms frame head of the synchronous control signal.

5. The method of claim 1, wherein the carrier routing is performed by,

when the communication standard supported by the distributed base station is UMTS or LTE, carrying out carrier routing on the IQ data after secondary framing according to a chip head of the synchronous control signal;

and when the communication standard supported by the distributed base station is CDMA, carrying out carrier routing on the IQ data after secondary framing according to a 6chip head of the synchronous control signal.

6. The method of claim 1, wherein the selection of the carrier routed IQ data is performed by,

when the determined networking mode is the main/standby mode, generating two groups of same IQ data from a group of IQ data after carrier routing;

when the determined networking mode is a cascade mode, directly selecting a group of IQ data after carrier routing;

and when the determined networking mode is the load sharing mode, all the two groups of different IQ data after carrier routing are selected.

7. An apparatus for implementing compatibility of multiple networking modes, based on a Radio Remote Unit (RRU) of a distributed base station, the apparatus comprising: the device comprises a Central Processing Unit (CPU), a downlink selection module, a downlink synchronous de-framing module, a downlink alignment delay module, an uplink synchronous framing module and an uplink selection module; wherein,

the CPU is used for determining the networking mode of the current application according to the networking mode selection instruction input by the user;

the downlink selection module is used for selecting IQ data and control words sent by a Common Public Radio Interface (CPRI) according to the determined networking mode;

the downlink synchronous de-framing module is used for analyzing the selected control word to obtain a synchronous control signal and a synchronous frame header of the synchronous control signal, and performing secondary de-framing on the selected IQ data according to the synchronous frame header and a communication standard supported by the distributed base station;

the downlink alignment delay module is used for synchronizing each carrier data of the IQ data and then sending the synchronized data to a downlink;

the uplink alignment delay module is used for carrying out delay compensation on each carrier of the IQ data transmitted by the uplink to synchronize the data of each carrier;

the uplink synchronous framing module is used for performing secondary framing and carrier routing on the IQ data subjected to delay compensation and the IQ data transmitted from the CPRI interface according to a communication standard supported by the distributed base station;

and the uplink selection module is used for selecting the IQ data after carrier routing and sending the selected IQ data to the CPRI interface.

8. The apparatus of claim 7, wherein the downlink selection module is specifically configured to,

when the networking mode determined by the CPU is the main/standby mode, selecting one group of IQ data and control words according to default configuration from two groups of same IQ data and control words sent from a CPRI interface;

when the networking mode determined by the CPU is a cascade mode, selecting IQ data and control words corresponding to the RRU of the current stage from IQ data and control words sent from a CPRI interface;

and when the networking mode determined by the CPU is a load sharing mode, all selecting two groups of different IQ data and control words.

9. The apparatus of claim 7, wherein the downlink synchronization deframing module is specifically configured to,

when the communication standard supported by the distributed base station is GSM, performing secondary deframing on the selected IQ data according to a 10ms frame header and a 3chip (chip) header of a synchronous control signal;

when the communication standard supported by the distributed base station is UMTS or LTE, performing secondary de-framing on the selected IQ data according to a 10ms frame header of the synchronous control signal;

and when the communication standard supported by the distributed base station is CDMA, performing secondary de-framing on the selected IQ data according to a 10ms frame header and a 6chip header of the synchronous control signal.

10. The apparatus of claim 7, wherein the uplink synchronization framing module is specifically configured to,

when the communication standard supported by the distributed base station is GSM, performing secondary framing on the IQ data according to a 60ms frame head of the synchronous control signal;

when the communication standard supported by the distributed base station is UMTS, LTE or CDMA, secondary framing is carried out on the IQ data according to the 10ms frame head of the synchronous control signal.

11. The apparatus of claim 7, wherein the uplink synchronization framing module is specifically configured to,

when the communication standard supported by the distributed base station is UMTS or LTE, carrying out carrier routing on the IQ data after secondary framing according to a chip head of the synchronous control signal;

and when the communication standard supported by the distributed base station is CDMA, carrying out carrier routing on the IQ data after secondary framing according to a 6chip head of the synchronous control signal.

12. The apparatus of claim 7, wherein the upstream selection module is specifically configured to,

when the networking mode determined by the CPU is the main/standby mode, generating two groups of same IQ data from one group of IQ data after carrier routing;

when the networking mode determined by the CPU is a cascade mode, directly selecting a group of IQ data after carrier routing;

and when the networking mode determined by the CPU is a load sharing mode, two groups of different IQ data after carrier routing are all selected.

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