CN103581926B - A kind of method and apparatus realizing multiple networking model compatibility - Google Patents
A kind of method and apparatus realizing multiple networking model compatibility Download PDFInfo
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Abstract
The invention provides a kind of method and apparatus realizing multiple networking model compatibility, described method includes: selects instruction according to the networking model of user's input, determines the networking model of current application；According to the networking model determined, choose I/Q data and control word that common public radio interface (CPRI) is sent；The control word chosen is resolved, obtains the synchronizing frame head of synchronous control signal and synchronous control signal, and carry out secondary solution frame according to the described synchronizing frame head I/Q data to choosing, and issue downlink after each carrier data synchronization of I/Q data；Each carrier wave of the I/Q data sent by up-link is carried out compensation of delay；The I/Q data that I/Q data after compensation of delay and CPRI interface are sent, the communication standard supported according to distributed base station carry out secondary framing and carrier path by；To carrier path by after I/Q data select, the I/Q data chosen is issued CPRI interface, uses the present invention can realize compatible multiple networking model between RRU and BBU.
Description
Technical Field
The present invention relates to a distributed base station in a communication system, and more particularly, to a method and an apparatus for implementing compatibility of multiple networking modes.
Background
The 3 rd generation mobile communication system adopts a distributed base station, the distributed base station comprises a Baseband Unit (BBU) and a Remote Radio Unit (RRU) which are connected by an optical fiber or a cable, and the BBU and the RRU can be remotely and separately arranged.
The Interface between The BBU and The RRU may adopt a Common Public Radio Interface (CPRI) or an Interface between The RRU and The BBU (IR). The networking mode between the RRU and the BBU can adopt a main/standby mode, a cascade mode or a load sharing mode.
The active/standby mode, as shown in fig. 1, means that one BBU is connected to one RRU through two pairs of different optical fibers, the BBU simultaneously transmits the same data to the two optical fibers, the RRU only processes the data of one pair of optical fibers under normal conditions, and when a pair of optical fiber links is abnormal, the system can automatically switch to another pair of optical fibers for communication under the condition that no call drop occurs, so that the system adopting the active/standby mode has high reliability. The pair of optical fibers refers to optical fibers of two different communication directions.
The cascade mode, as shown in fig. 2, means that one BBU connects two or more RRUs through a pair of optical fibers, and each RRU communicates with the BBU according to a sequence number allocated by a network. The system adopting the cascade mode has wide coverage range.
The load sharing mode, as shown in fig. 3, means that one BBU is connected to one RRU through two pairs of different optical fibers, or two BBUs are connected to one RRU through two pairs of different optical fibers, the two pairs of optical fibers have different transmission contents, and a system using the load sharing mode can fully utilize the processing capability of the RRUs, so that the system utilization rate is high.
At present, multiple networking modes cannot be compatible between the RRU and the BBU, only one networking mode can be selected, and a cascade mode is generally adopted. Therefore, when the requirement on the reliability of the system is high, the networking mode between the RRU and the BBU needs to be changed from the cascade mode to the main/standby mode; when the requirement on the utilization rate of the system is high, the networking mode between the RRU and the BBU needs to be changed from the cascade mode to the load sharing mode. Changing the networking mode between the RRU and the BBU requires reconfiguring the distributed base station, which not only causes configuration errors due to complex operation and further affects the normal operation of the system, but also increases the cost of system operation.
Disclosure of Invention
In view of this, the main object of the present invention is to provide a method and an apparatus for implementing compatibility of multiple networking modes, which can implement compatibility of multiple networking modes between an RRU and a BBU, avoid reconfiguration of a distributed base station, and reduce the cost of system operation.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the invention provides a method for realizing compatibility of various networking modes, which is based on a Radio Remote Unit (RRU) of a distributed base station and 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.
Preferably, the IQ data and the control word sent from a Common Public Radio Interface (CPRI) are selected according to the determined networking mode, and, for,
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.
Preferably, the secondary de-framing is performed on the selected IQ data according to the synchronization frame header and the communication standard supported by the distributed base station, and, for this purpose,
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.
Preferably, the secondary framing is performed according to a communication standard supported by the distributed base station, and, for example,
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.
Preferably, the carrier routing is performed by, for example,
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.
Preferably, the IQ data after carrier routing is selected such that,
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.
The invention provides a device for realizing compatibility of various networking modes, which is a Radio Remote Unit (RRU) based on a distributed base station, and comprises: 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.
Preferably, 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.
Preferably, 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.
Preferably, 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.
Preferably, 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.
Preferably, the uplink 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.
From the above, the technical scheme adopted by the invention is as follows: 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 CPRI interface 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; the IQ data after carrier routing is selected, and the selected IQ data is sent to the CPRI interface, so that a plurality of networking modes can be compatible between the RRU and the BBU, the networking modes can be switched as required, and the networking modes do not need to be changed, thereby avoiding reconfiguring the distributed base station and reducing the cost of system operation.
Drawings
Fig. 1 is a schematic structural diagram of a distributed base station when a networking mode between an RRU and a BBU is a master/standby mode;
fig. 2 is a schematic structural diagram of a distributed base station when a networking mode between an RRU and a BBU is a cascade mode;
fig. 3 is a schematic structural diagram of a distributed base station when a networking mode between an RRU and a BBU is a load sharing mode;
FIG. 4 is a flowchart of a first embodiment of a method for implementing compatibility of multiple networking modes according to the present invention;
FIG. 5 is a schematic structural diagram of an embodiment of an apparatus for implementing compatibility of multiple networking modes according to the present invention;
FIG. 6 is a flowchart of a second embodiment of a method for implementing compatibility of multiple networking modes according to the present invention;
FIG. 7 is a schematic flow diagram of data in the device according to the present invention when the networking mode determined by the CPU is the active/standby mode;
FIG. 8 is a schematic flow chart of data in the apparatus of the present invention when the networking mode determined by the CPU is the cascade mode;
fig. 9 is a schematic flow chart of data in the apparatus of the present invention when the networking mode determined by the CPU is the load sharing mode.
Detailed Description
The basic idea of the invention is: 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 CPRI interface 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.
The invention provides a method for realizing compatibility of multiple networking modes, wherein an RRU (radio remote unit) based on a distributed base station adopts a CPRI (central processing unit) interface as an interface between the RRU and a BBU (base band unit), as shown in figure 4, a first embodiment of the method for realizing compatibility of multiple networking modes provided by the invention comprises the following steps:
wherein, the downlink step comprises:
step 401, determining a networking mode of a current application according to a networking mode selection instruction input by a user;
step 402, selecting IQ data and control words sent by a CPRI interface according to the determined networking mode;
step 403, analyzing the selected control word to obtain a synchronization control signal and a synchronization frame header of the synchronization control signal, performing secondary de-framing on the selected IQ data according to the synchronization frame header and a communication standard supported by the distributed base station, and synchronizing each carrier data of the IQ data and then sending the synchronized data to a downlink;
wherein, the ascending step comprises:
step 404, performing delay compensation on each carrier of the IQ data transmitted through the uplink to synchronize the data of each carrier;
step 405, performing secondary framing and carrier routing on the IQ data after delay compensation and the IQ data sent by the CPRI interface according to a communication standard supported by the distributed base station;
and step 406, selecting the IQ data after carrier routing, and sending the selected IQ data to the CPRI interface.
Preferably, in the step 402, according to the determined networking mode, the IQ data and the control word sent from the CPRI interface are selected as,
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.
Preferably, in the step 403, the secondary de-framing is performed on the selected IQ data according to the synchronization frame header and the communication standard supported by the distributed base station, and may be,
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.
Preferably, in step 405, performing secondary framing according to a communication standard supported by the distributed base station, may be,
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.
Preferably, the carrier routing in step 405 may be,
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.
Preferably, the IQ data after carrier routing is selected in step 406, and may be,
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.
The invention provides a device for realizing compatibility of various networking modes, wherein an RRU (radio remote unit) based on a distributed base station adopts a CPRI (central processing unit) interface as an interface between the RRU and a BBU (base band unit), as shown in figure 5, an embodiment of the device for realizing compatibility of various networking modes provided by the invention comprises the following steps: a Central Processing Unit (CPU), a downlink selection module, a downlink synchronous deframing 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 the CPRI interface 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.
Preferably, the downlink selection module may be 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.
Preferably, the downlink synchronization deframing module may be specifically configured to,
when the communication standard supported by the distributed base station is GSM, performing secondary de-framing on the selected IQ data according to a 10ms frame header and a 3chip header of the 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.
Preferably, the uplink synchronization framing module may be 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.
Preferably, the uplink synchronization framing module may be specifically configured to,
when the communication standard supported by the distributed base station is UMTS or LTE, carrying out carrier routing on IQ data according to a chip head of a synchronous control signal;
when the communication standard supported by the distributed base station is CDMA, the IQ data is subjected to carrier routing according to the 6chip head of the synchronous control signal.
Preferably, the uplink selection module may be 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.
In the following, a second embodiment of the method for implementing compatibility of multiple networking modes of the present invention is described, in this embodiment, an interface between the BBU and the RRU adopts a CPRI interface, which includes a first interface CPRI0 and a second interface CPRI1, as shown in fig. 6, the method of this embodiment includes the following steps:
wherein, the downlink step comprises:
step 601, according to a networking mode selection instruction input by a user, the CPU determines the currently applied networking mode.
Specifically, when a networking mode selection instruction input by a user is to select a main/standby mode, the CPU determines that the main/standby mode is a currently applied networking mode;
when a networking mode selection instruction input by a user is a cascade mode selection instruction, the CPU determines that the cascade mode is a networking mode currently applied;
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 parse the received data packet to obtain downlink IQ data, control words, and signaling.
Specifically, when the networking mode determined by the CPU is the main/standby mode, referring to fig. 7, CPRI0 and CPRI1 each receive a group of identical data packets sent by BBU, and analyze the received data packets respectively to obtain two groups of identical IQ data, control words, and signaling;
when the networking mode determined by the CPU is the cascade mode, referring to fig. 8, CPRI0 or CPRI1 receives the data packet sent by the BBU, and analyzes the received data packet to obtain IQ data, a control word, and a signaling.
If the data packet sent by the BBU is received by the CPRI0, the CPRI0 is connected with the BBU, the CPRI0 is used as an uplink interface, and the CPRI1 is used as a downlink interface to be connected with a lower RRU; if the CPRI1 receives the data packet sent by the BBU, the CPRI1 is connected to the BBU, the CPRI1 serves as an uplink interface, and the CPRI0 serves as a downlink interface to be connected to the lower-level RRU. In this embodiment, the CPRI0 receives a data packet sent by the BBU, the CPRI0 serves as an uplink interface, the CPRI1 serves as a downlink interface, and referring to fig. 8, the lower RRU is an RRU 2.
When the networking mode determined by the CPU is the load sharing mode, referring to fig. 9, CPRI0 and CPRI1 each receive a group of data packets, where 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 groups of different IQ data, control words, and signaling.
603, according to the networking mode determined by the CPU, selecting IQ data, control words, and signaling analyzed by CPRI0 and/or CPRI1 by a downlink selection module;
specifically, when the networking mode determined by the CPU is the master/standby mode, referring to fig. 7, the downlink selection module selects a group of IQ data, control words, and signaling from the two groups of same IQ data, control words, and signaling that are analyzed, according to a default configuration, and sends the selected signaling to the CPU;
when the networking mode determined by the CPU is the cascade mode, the downlink selection module selects IQ data, a control word, and a signaling corresponding to the sequence number of the current stage RRU (see fig. 8, the current stage RRU is RRU1 in this embodiment) from the IQ data, the control word, and the signaling that are analyzed, and forwards the received IQ data, the control word, and the signaling to a lower stage RRU through a downlink interface;
when the networking mode determined by the CPU is the load sharing mode, referring to fig. 9, the downlink selection module selects all two different sets of IQ data, control words, and signaling, sends the IQ data to the downlink synchronous de-framing module, sends the control words to the CPU, and sends the two different sets of signaling to the CPU after performing scheduling processing in a time division multiplexing manner.
Step 604, the downlink synchronous de-framing module analyzes the control word selected by the downlink selection module to obtain a synchronous control signal and a synchronous frame header of the synchronous control signal, and performs secondary de-framing on the IQ data selected by the downlink selection module according to the synchronous frame header;
specifically, when the communication standard supported by the distributed base station is GSM, the downlink synchronous de-framing module performs secondary de-framing processing on the selected IQ data according to a 10ms frame header and a 3chip header of a synchronous control signal obtained by self-analysis;
when the communication standard supported by the distributed base station is UMTS and LTE, the downlink synchronous de-framing module performs secondary de-framing processing on the selected IQ data according to a 10ms frame header of a synchronous control signal obtained by self analysis;
when the communication standard supported by the distributed base station is CDMA, the downlink synchronous de-framing module performs secondary de-framing processing on the selected IQ data according to a 10ms frame header and a 6chip header of a synchronous control signal obtained by self analysis;
the secondary deframing of the IQ data is done to make more efficient use of the transmission bandwidth.
Step 605, the downlink synchronous de-framing module performs carrier routing on the IQ data after secondary de-framing.
Step 606, the downlink alignment delay module performs delay compensation on each carrier of the IQ number after the downlink synchronization de-framing module carrier routing, so that each carrier data is synchronized, and the IQ data after delay compensation is sent out through a downlink.
Wherein, the ascending step comprises:
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 transmitted via the uplink to synchronize each carrier of the IQ data;
specifically, when the networking mode determined by the CPU is the master/standby mode, referring to fig. 7, the uplink alignment delay module performs carrier delay compensation on each carrier of a set of IQ data transmitted through an uplink;
when the networking mode determined by the CPU is the cascade mode, referring to fig. 8, the uplink alignment delay module performs carrier delay compensation on each carrier of a set of uplink IQ data transmitted through the uplink;
when the networking mode determined by the CPU is a load sharing mode, referring to fig. 9, the uplink alignment delay module performs delay compensation on each carrier of two different sets of IQ data transmitted via an uplink, respectively, to obtain two different sets of IQ data.
Step 608, the uplink synchronous framing module performs secondary framing on the IQ data after delay compensation of the uplink alignment delay module and the IQ data sent from the CPRI1 interface;
here, when the networking mode determined by the CPU is the active/standby mode and the load sharing mode, referring to fig. 7 and 9, the uplink synchronous framing module performs secondary framing on the IQ data after the delay compensation by the uplink alignment delay module.
When the networking mode determined by the CPU is the cascade mode, referring to fig. 8, 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 from the CPRI1 interface.
Specifically, when the communication standard supported by the distributed base station is GSM, the uplink synchronous framing module performs secondary framing processing on IQ data corresponding to the control word according to a 60ms frame head of a synchronous control signal obtained by analyzing by the downlink synchronous de-framing module;
and when the communication standard supported by the distributed base station is UMTS, LTE or CDMA, the uplink synchronous framing module carries out secondary framing processing on the IQ data corresponding to the control word according to the 10ms frame head of the synchronous control signal selected by the downlink selection module.
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 3-chip head 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 carries out carrier routing on the IQ data according to the chip head 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 carries out carrier routing on the IQ data according to the 6chip head 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 IQ data after carrier routing by the uplink synchronous framing module, and sends the selected data to CPRI0 and/or CPRI 1;
specifically, when the networking mode determined by the CPU is the master/standby mode, the uplink selection module generates two sets of the same control word, signaling and IQ data from the received control word, signaling and a set of IQ data after carrier routing by the uplink synchronous framing module, and sends the two sets of the same control word, signaling and IQ data to the CPRI0 and the CPRI1, respectively;
when the networking mode determined by the CPU is a cascade mode, an uplink selection module sends a group of IQ data subjected to carrier routing by an uplink synchronous framing module to an uplink interface CPRI0, sends a control word of the RRU of the current stage and a control word sent by a lower RRU to the uplink interface in a merging or time-sharing multiplexing mode, reasonably schedules a signaling of the RRU of the current stage and a signaling sent by the lower RRU, ensures that the sum of the rates of the two signaling is not more than the maximum interface rate supported by the CPRI, and sends the scheduled signaling to the uplink interface;
and when the networking mode determined by the CPU is a load sharing mode, the uplink selection module respectively sends the received two groups of different control words and signaling and the two groups of different IQ data after the carrier route of the uplink synchronous framing module to the CPRI0 and the CPRI 1.
Step 611, CPRI0 and/or CPRI1 framing the received IQ data, control words and signaling to form data packets, and sending out the data packets;
specifically, when the networking mode determined by the CPU is the main/standby mode, as shown in fig. 7, CPRI0 and CPRI1 respectively frame the received IQ data, control words, and signaling to form data packets, and respectively send the data packets to the BBU;
when the networking mode determined by the CPU is the cascade mode, as shown in fig. 8, the uplink interface performs framing processing on the received IQ data, control words, and signaling to form a data packet, and sends the data packet to the BBU;
when the networking mode determined by the CPU is the load sharing mode, as shown in fig. 9, the CPRI0 and the CPRI1 respectively frame the received IQ data, the control word, and the signaling to form a data packet, and respectively send the data packet to the first BBU (BBU0) and the second BBU (BBU 1).
The above description is only a preferred embodiment of the present invention, and is not intended to limit the 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, synchronizing each carrier data of the IQ data and then sending the synchronized carrier data to a downlink, and performing carrier routing on the secondary de-framed IQ data;
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 the determined networking mode and the 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 according to a communication standard supported by a distributed base station, and wherein the carrier routing is performed according to a communication standard supported by the distributed base station,
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, 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 performing carrier routing on the IQ data subjected to secondary de-framing;
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 through the uplink according to the determined networking mode so as 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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