181 results about "Common Public Radio Interface" patented technology

The present invention provides a method for realizing transmission of multiprotocol client signals in a distributed base station subsystem, comprising: encapsulating client signals by a GFP-T frame; and mapping said GFP-T frame into a lower-layer transmission link to realize the transmission of client signals. Said lower-layer transmission link is a common public radio interface CPRI link. Said client signals are one of the following: baseband I/Q signals of WCDMA supported by CPRI protocol, baseband I/Q signals of radio interface protocols other than WCDMA, structured signals of E1/T1, STM-1 and other constant-rate links, structured variable-rate link signals such as Ethernet MAC frame signals, PPP/HDLC frame signals, etc. This method is also applicable to other types of synchronous transmission links between a remote radio unit and a primary baseband processing unit, e.g., the links as specified by OBSAI (Open Base Station Architecture Initiative).

A system that incorporates aspects of the subject disclosure may perform operations including, for example, obtaining uplink information associated with a downlink path, wherein the uplink information includes operational parameters used by a plurality of communication devices for transmitting wireless signals on a plurality of uplink paths, performing, based on the uplink information, a plurality of measurements of the plurality of uplink paths via a plurality of fiber optic cables from a plurality of remote radio units, wherein the plurality of uplink paths conform to a common public radio interface (CPRI) protocol, identifying a measurement from the plurality of measurements that is below a threshold, thereby indicating an affected uplink path of the plurality of uplink paths, and initiating a corrective action to improve a measurement of the affected uplink path based on the identifying. Other embodiments are disclosed.

The method thereof comprises: after the sending end converts the CPRI data into the frames adaptive to Ethernet transmission, it transmits the converted frames on the Ethernet; the receiving end receives the converted frames through Ethernet, and restores the converted frames into CPRI frames to get CPRI data. Before transmitting the CPRI data of one data packet, the frame head is firstly transmitted through IQ bandwidth; in the gaps of transmitting different data packets, the inter-frame gap is transmitted by using IQ bandwidth.

To provide means for taking action against a fault of a CPRI link of a radio base station in which a CPRI is used as an internal interface between a radio control unit and a radio unit at a low cost, a communication device for directly connecting a plurality of radio units and a device for realizing a bypass route of the CPRI link for connecting a pertinent radio unit to the radio control unit by the communication device and a vendor specific area on a CPRI link connecting another radio unit to the radio control unit are provided.

The present invention discloses universal public wireless interface transmission multi-system wireless service IQ data method to make CPRI interface capable of transmitting variety different system wireless service data. It contains according to CPRI basic frame cycle and system cyclic common multiple relation, setting M individual periodic IQ data in NCPRI basic frame to transmit, to make transaction data rate and CPRI interface rate matching convenient for realizing frame synchronization; uniformly filling M individual periodic IQ data in N CPRI basic frame IQ container, designing different kinds of filling mode to make IQ data reaching rate uniform through container mapping; through dividing same CPRI interface corresponding different RE and different system IQ data in CPRI basic frame IQ container, realizing variety different system IQ data in CPRI interface simultaneous transmission.

The invention provides a method and device for transmitting non-I (in-phase)/Q (quadrature phase) data through a common public radio interface (CPRI), and belongs to the technical field of communications. The device comprises a packaging module and a transmission module. The method comprises the following steps: when the CPRI is positioned before downlink modulation or after uplink demodulation, adding a packet header to the data transmitted on the CPRI and then packaging the data into an information packet, wherein, the header comprises at least one or more than one field as follows: an destination address field, a source address field, a packet type field, a start-of-packet (SOP)/end-of-packet (EOP) mark field, a data length field and a sequence number field; mapping the information packet into one or more than one information packet container; bearing the information packet container in a superframe; and transmitting the superframe through the CPRI. By utilizing the method and the device, the non-I/Q data can be borne in a CPRI frame and transmitted through the CPRI.

The embodiment of the invention discloses a wavelength selection method, a wavelength selection device and a wavelength selection system, relates to the field of optical integration and solves the technical problem that the conventional equipment is greatly modified in the process of transmitting common public radio interface (CPRI) optical signals through an optical distribution network (ODN) inthe prior art. The method in the embodiment of the invention comprises the following steps of: configuring the receiving wavelength of an optical module as a first uplink wavelength according to a wavelength allocation list; acquiring uplink detection information for indicating whether an uplink optical signal reflected by a partial reflector is detected on the first uplink wavelength; if the acquired uplink detection information indicates that the reflected uplink optical signal is not detected, configuring the receiving wavelength of the optical module as a corresponding first downlink wavelength; acquiring downlink detection information; and if the acquired downlink detection information indicates that a downlink optical signal is detected, configuring the transmitting wavelength of the optical module as the first uplink wavelength. The embodiment of the invention is mainly applied to wavelength division multiplexing (WDM) scenes.

The invention relates to the technical field of communication, in particular to a signal sending method, device and system. The method is applied in a system provided with a radio remote unit RRU and a baseband processing unit BBU. The method includes receiving CPRI (common public radio interface) signals sent by the radio remote unit RRU; performing channel separation processing on the CPRI signals, acquiring channel signals, at least containing physical uplink shared channel signals, after the separation processing; performing multi-antenna equalization processing on the physical uplink shared channel signals; sending the processed physical uplink shared channel signals to the baseband processing unit BBU. The method has the advantages that multi-antenna data streams can be compressed, data compression rate is increased, and data transmitting cost is reduced.

A method for transmitting Common Public Radio Interface (CPRI) data in a radio base station is provided, which is applicable to the radio base station having at least two CPRI links between a Radio Equipment Control (REC) and a Radio Equipment (RE). The method includes: dividing by the REC, in-phase/quadrature phase (I/Q) data that needs to be transmitted to the RE into multiple paths of I/Q data with different content, where the multiple paths of I/Q data with different content make up the I/Q data before being divided; transmitting, by the REC, all paths of divided I/Q data to the RE over the at least two CPRI links.

The invention provides an interface switching device. Base band data and control information are transmitted between a CRAN (Cloud Radio Access Network) server and the interface switching device through an UDP data packet, the synchronization is realized, and switching from a 10GE interface to a CPRI (Common Public Radio Interface) between the CRAN server and an RRU (Remote Radio Unit) is realized. The interface switching device provided by the embodiment of the invention enables networking to be flexible, simple and convenient, is easy to realize, and reduces the networking cost.

The present invention relates to an interface transmitting multimode IQ data in a BBU (baseband unit), which applies the LVDS (Low Voltage Differential Signaling) standard and data frames based on a BF (basic frame) format. The BF structure includes eight-channel 16-bit data area signals, a 16-bit FLAG signal and a 16-bit check sum signal; wherein, the eight-channel 16-bit data area signals are respectively connected with interface input ends from Din 9 to Din 2, serially transmit 128-bit IQ data and are evenly assigned to four-channel carrier wave-carried multimode IQ data; the 16-bit FLAG signal is connected with the interface input end Din 1 in order to partition neighboring BFs; the 16-bit check sum signal is connected with the interface input end Din 0 and check the eight-channel data area signals and the FLAG signal. The interface input ends from Din 9 to Din 0 are multiplexed into a LVDS link in order to serially transmit IQ data in the BBU bit by bit, and the speed rate of the BF accords with the speed rate of the radio frame of the CPRI (Common Public Radio Interface) standard. The present invention can conveniently map the IQ data of UMTS (Universal Mobile Telecommunication System) and GSM (Global System for Mobile Communication) into the BF and ensure that the mixed transmission of double-mode IQ data can be conveniently carried out in the BF.

A controller device can control the time of a slave sub-system in a chain in a base station system. The controller device comprises a slave transceiver for receiving/transmitting from/to a master sub-system, and a synchronization device for synchronizing a clock of the slave transceiver to a clock of the master sub-system based on the received signal received from the master sub-system. The synchronization circuitry comprises a clock input port for receiving an external clock signal from an external clock generator. At a received signal input port the received signal can be received from the master transceiver. A tracking loop couples the received signal input and the second phase input to a control input of a controllable PLL, for providing a negative feedback which controls a phase and/or frequency of the feedback signal to counter the phase and or frequency error between the external clock signal and the received signal.

The invention discloses a common public radio interface (CPRI) service transmitting/receiving method and device. The transmitting method comprises the following steps: adding a check bit to each service flow coding block to obtain a check coding block, and forming multiple check coding blocks into a check frame, wherein the added check bit to the service flow coding block in the current check frame is the check bit of the service flow coding block in the previous check frame; forming multiple check frames into a superframe, and identifying the frame header of the superframe; and transmitting the identified superframe. By using the invention, the efficient line coding mechanism can be used for the CPRI interface service transmission, and the corresponding check protection mechanism and superframe synchronization mechanism can be provided, thereby meeting the application requirements of next generation of CPRI for the transmission rate.

The embodiment of the invention discloses a method for transmitting a common public radio interface (CPRI) signal. The method comprises the following steps: acquiring the CPRI signal by transmission equipment, and acquiring antenna-carrier (AxC) container configuration information of the CPRI signal, wherein the AxC container configuration information includes indication information of a valid AxC container; mapping the valid AxC container in the CPRI signal into a virtual basic frame according to the AxC container configuration information; and mapping the virtual basic frame into an optical channel data unit (ODU), mapping the ODU into an optical channel transport unit (OTU), and transmitting the OUT into an optical transport channel. The transmission equipment maps the valid AxC container in the CPRI signal into the virtual basic frame, thereby increasing the utilization ratio of an optical transport network (OTN) transfer bandwidth.

The invention discloses a common public radio interface (CPRI) frame-based wavelength division multiplexing-passive optional network (WDM-PON) mobile and fixed integrated access system, and relates to the field of PON access. The mobile and fixed integrated access system comprises a mobile and fixed integrated access optical line terminal (OLT), an optional distribution network (ODN) and a plurality of mobile and fixed integrated access optional network units (ONUs); the mobile and fixed integrated access OLT is connected with the mobile and fixed integrated access ONUs through the ODN; the mobile and fixed integrated access OLT comprises a local end relay framing module, N parallel local end WDM-PON optical modules and a coupler, wherein N is a positive integer and N is greater than or equal to 8 and is less than or equal to 64; the local end relay framing module is connected with the coupler through the N parallel local end WDM-PON optical modules; each mobile and fixed integrated access ONU comprises a far end framing module and a far end WDM-PON optical module; and the coupler is connected with each WDM-PON optical module through the ODN. By the CPRI frame-based WDM-PON mobile and fixed integrated access system, mobile service and fixed network service can be transmitted at the same time; deep coverage of mobile radio signals of an operator can be realized; and the trunk fiber resources accessed in a network can be saved.

The invention discloses a method and a system for realizing resource distribution between a baseband processing unit and a radio frequency unit. The system comprises the baseband processing unit (BBU) and the radio frequency unit (RRU). The method comprises the following steps: after receiving baseband data input in parallel by each channel of the BBU, converting the parallel data into serial data, and then exchanging the serial data to each corresponding channel at the side of the RRU according to an exchange configuration table, according to a common public radio interface (CPRI) protocol, packaging the obtained serial data after exchanging, and then sending the serial data to the RRU; after depackaging the received serial data by the RRU, carrying out a deserialized process, and outputting the deserialized data of each channel through the corresponding channel. Compared with the prior art, the invention uses a complete serial exchange method so as to realize the resource distribution and the data transmission between the BBU and the RRU and greatly reduce the scale of the exchange unit.

The utility model relates to the communication field, disclosing a method and a system to transmit wireless business data through a common public radio interface (CPRI), enabling the IQ data of the different system modes to be transmitted by a CPRI frame. The utility model is characterized in that an IQ data area of a CPRI base frame is constructed as a transmission container, the transmitting IQ data and the type field for the IQ data of the system mode form a sampling signal unit, which are sent after being filled in the transmitting container based on the sampling order. The sampling signal unit is extracted in order from the transmitting container by a receiving end, and the timing information of the IQ data system mode in the sampling signal unit is resumed based on the value of the type field, and the subsequent process of the IQ data is finished. The basic information comprises the corresponding relationship of the style field value and the IQ data system mode, the frame number constructing the CPRI basic frame of the transmitting container and the IQ data bit of the different system modes.

An embodiment of the invention discloses a wireless communication method and a distributed base station system, which relates to the field of communication and can realize multi-communication-system support functions of BBUs (baseband units) on the premise of keeping existing networking modes unchanged. A data transmission method based on CPRI (common public radio interface) includes: transmitting the BBU of the second communication system to second control data of at least one radio remote unit (RRU) to convert similar-CPRI type combined data and transmitting the combined data to the BBU of the first communication system through similar-CPRI type channels; restoring the combined data received by the BBU of the first communication system to be second control data, transmitting the second control data and the first control data to at least one RRU through CPRI channels so that at least one RRU supports data uploading and/or downloading of the first communication system and the second communication system.

The embodiment of the invention relates to method and device for transmitting data between common public radio interface CPRI ports, belonging to the technical field of communication, wherein the method comprises the following steps of: when the CPRI receive port of a CPRI node receives IQ data columns, copying the IQ data columns received by each CPRI receive port into M portions of IQ data columns, wherein M is not less than the CPRI receive port number of the CPRI node, and each of M portions of IQ data columns corresponds to one CPRI receive port; according to the rules that the CPRI receive port acquires the objective IQ data columns, when the IQ data columns which corresponds to the same CPRI receive port comprise the objective IQ data columns, acquiring the objective IQ data columns and transmitting the objective IQ data columns to the same CPRI receive port. The method and device for transmitting data between common public radio interface CPRI ports can realize that a plurality of ports transmit data simultaneously under the condition of fixed bandwidth, thereby greatly increasing the efficiency of data transmission between the ports and increasing the information processing speed.

The invention relates to a method for testing uplink chain delay of a radio remote unit (RRU). The method comprises the steps that: the RRU receives a testing signal, samples data to a digital down-conversion (DDC) filter through an analogy to digital converter (ADC), relocates a filter coefficient of the DDC, and filters and outputs delay data; and after the filter outputs data to a common public radio interface (CPRI) module, a peak detection module detects the data, and calculates the uplink link delay after detection. The invention also provides a device for testing the uplink chain delay of the RRU. By adopting the technical scheme provided by the invention, the testing efficiency is increased and the testing accuracy is ensured.