CN101296390A - Communication method and address automatic allocation and recognition method for inside node of base station - Google Patents
Communication method and address automatic allocation and recognition method for inside node of base station Download PDFInfo
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Abstract
The invention discloses a communication method of internal nodes of a base station and a method for automatically distributing and identifying the address of a radio frequency processing device, wherein, the communication method includes that S702, digital baseband signals of a chip form a first data packet by a transmitting terminal while the first data packet does not include signaling information; a plurality of first data packets and a common channel signaling form a second data packet by the transmitting terminal; a first identification which is used for identifying the boundary of the second data packet, a link private signaling, a remote radio frequency private signaling and a plurality of second data packets are arranged in sequence to form a third data packet by the transmitting terminal, and then a plurality of third data packets form a radio frame; S704, the transmitting terminal processes a first identification corresponding to the first third data packet of the radio frame to a second identification so as to be used for identifying the boundary of the radio frame, and at least one radio frame is sent to a receiving terminal; and S706, the receiving terminal receives the radio frame and resolves the radio frame according to the first identification and the second identification.
Description
Technical field
The present invention relates to the communications field, more specifically, relate to a kind of communication means and a kind of address that is used for inside node of base station and distribute automatically and recognition methods.
Background technology
The structure of typical cellular communication system as shown in Figure 1, subscriber equipment (UserEquipment is called for short UE) communicates in propagation of eating dishes without rice or wine and system side equipment by wireless signal.System side equipment comprises base station (Node B), radio network controller (RadioNetwork Controller is called for short RNC), reaches core network (Core Network is called for short CN).Wherein, RNC and Node B (Node B) form RNS (RadioNetwork Subsystem is called for short RNS).
Wherein, Node B can be divided into digital processing part (or Base-Band Processing part) and Radio frequency Processing Unit, RF Processing Unit.By conventional method, Node B designs for integral type, i.e. digital processing part and Radio frequency Processing Unit, RF Processing Unit are arranged in same rack, and perhaps both are positioned at same place, and perhaps both distances are very short.And in new design, the design that Node B adopts digital processing part and radio frequency part to be separated more and more adopts optical fiber or cable to communicate between the two.For convenience of description, digital processing element represents that with abbreviation BBU the radio frequency part that is positioned at far-end is represented with abbreviation RRU.
Wherein, there is common public radio interface (CPRI) between BBU and the BRU.There are two kinds of common public radio interface (CPRI) and open base-station interfaces (OBSAI) at present.Equally the base station is divided into the assign to standard of defining interface of digital processing part and radio-frequency part and has only CPRI.
Common public radio interface is an interface specification of being formulated by CPRI alliance, and pertinent literature comprises: CPRI Specification V2.0, source: http://www.cpri.info/.
The base station comprises digital processing part and Radio frequency Processing Unit, RF Processing Unit, according to the CPRI standard, digital processing partly is called radio equipment controller (Radio Equipment Controller, be called for short REC, be equivalent to BBU), Radio frequency Processing Unit, RF Processing Unit is called wireless device (Radio Equipemt is called for short RE, is equivalent to RRU).User side data is digital baseband signal (IQ) between REC and the RE.The REC schematic diagram that (no cascade) is connected with a RE as shown in Figure 2.REC surveys with radio network controller at network and carries out interface (Iub interface).RE carries out interface (Uu interface) by wireless mouth and subscriber equipment.
A schematic diagram of CPRI agreement as shown in Figure 3.Interface data comprises user's face (UserPlane), control maintenance panel (Control﹠amp; Management Plane) and synchronously (SYNC).The CPRI interface comprises layer one (Layer 1) and the layer two-layer definition in two (Layer 2).
The frame format definition of CPRI frame as shown in Figure 4.A radio frames (length is 10ms, represents frame number with BFN) is made up of 150 superframes (hyperframe), and Hyper Frame Number is represented (from 0 to 149) with Z; A superframe is made up of 256 basic frames (basic frame) again, and basic frame number is represented (from 0 to 255) with X; A basic frame is made up of 16 words (Word), and wherein first Word is a control word, the IQ data that 15 Word in back carry user's face for the user, and the word numbering is represented with W; 1 Word is made up of some bytes (Byte), and its numbering is represented with Y.The length of a basic frame is 1 Tchip (260.42ns).
As shown in Figure 5, a superframe (256 control words) is divided into 64 subchannels (subchannel), and per 4 control words are formed a subchannel.The index of subchannel is represented with Ns, value 0 to 63.Value 0 to 3 represented in the index of a subchannel (4 control words) with Xs.The interior control word index X of superframe can be expressed as X=Ns+64*Xs.In the CPRI standard, the subchannel of Ns from 3 to 15 is reserved field, and is undefined, is used for later function expansion.The CPRI interface is supported three kinds of interface rate: 614.4Mbps, 1.2288Gbps, 2.4576Gbps.
In the TD-SCDMA system, the system configuration of BBU+RRU also is used.Macro base station RRU is 6 carrier waves, 4 antennas or 8 antennas often, so need transmit 24 pairs or 48 pairs of IQ data between BBU and the RRU in 1 chip, general I and Q The data 16 bit bit wides.
Be applied on the TD-SCDMA at CPRI, adopt the 1.2288Gbps interface rate, IQ adopts under the situation of 16bit, can only pass 22 pairs of IQ data in 1 chip.Pass 24 pairs of IQ data if desired, then can only drop to 15 bits to the figure place of IQ.Adopt the 2.4576Gbps interface rate, situation is also similar.Therefore the CPRI interface is used on TD-SCDMA, and its flexibility is not enough.
Summary of the invention
One or more problems in view of the above the invention provides a kind of communication means and a kind of address that is used for radio frequency handling device that is used for inside node of base station and distribute automatically and recognition methods.
The communication means that is used for inside node of base station according to the present invention may further comprise the steps: S702, and transmitting terminal is formed first packet with the digital baseband signal in the chip, does not comprise signaling information in first packet; Transmitting terminal is formed second packet with a plurality of first packets and a common channel signalling; First mark, link dedicated signaling, far end radio frequency dedicated signaling and a plurality of second continuous packet that transmitting terminal will be used to discern the border of second packet rearrange the 3rd packet in order, and will radio frames of a plurality of the 3rd packets compositions; S704, transmitting terminal is processed into second mark being used to discern the border of radio frames to first mark of first the 3rd packet correspondence of radio frames, and at least one radio frames is sent to receiving terminal; And S706, receiving terminal receives radio frames, and resolves radio frames according to first mark and second mark.
Wherein, inside node of base station comprise following at least one: digital processing unit and radio frequency handling device.Second mark comprise following at least one: be used to discern second mark special byte K28.5, be used to carry out the check byte that resets byte and be used for the digital baseband signal of previous first packet of verification of reset operation.
Wherein, first mark comprise following at least one: be used to discern first mark special byte K23.7, be used to carry out the check byte that resets byte and be used for the digital baseband signal of previous first packet of verification of reset operation.
Wherein, determine according to the value of the bit n of all bytes of the bit n of the check byte in first mark or second mark and previous first packet whether previous first packet is correct, wherein, n=0～7, n is an integer.
Under the situation of operate as normal, transmitting terminal all is set to first value with the byte that resets in first mark and second mark, and expression does not reset; Under the situation that needs reset, the byte that resets in transmitting terminal first mark and second mark is set to second value, expression need reset, receiving terminal is under the situation of second value the m that receives the byte that resets, the byte that will reset is forwarded to the cascade port horizontal reset of going forward side by side, wherein, m is a positive integer; Wherein, transmitting terminal is a digital processing unit, and receiving terminal is a radio frequency handling device.
Wherein, the message that detects from digital processing unit at radio frequency handling device carries under the situation of the digital processing unit sign identical with its sign, and radio frequency handling device determines that message is the message that sends to it; Under different situations, radio frequency handling device is transmitted message.
Wherein, the link dedicated signaling comprises OAM (the Operation And Maintenance that is used to represent message transmission destination, operation and maintenance) sign, identify under the situation identical with its sign at the OAM that radio frequency handling device carries from the message that digital processing unit receives, radio frequency handling device is just to digital processing unit transmit operation maintain message.Wherein, radio frames is the 10ms frame.
The address that is used for radio frequency handling device according to the present invention distributes automatically and recognition methods may further comprise the steps: S802, and digital processing unit is formed first packet with the digital baseband signal in the chip, does not comprise signaling information in first packet; Transmitting terminal is formed second packet with a plurality of first packets and a common channel signalling; First mark, link dedicated signaling, far end radio frequency dedicated signaling and a plurality of second continuous packet that transmitting terminal will be used to discern the border of second packet rearrange the 3rd packet in order, and with radio frames of a plurality of the 3rd packets compositions, wherein, the link dedicated signaling comprises radio frequency handling device sign and link indication information; S804, digital processing unit is processed into second mark being used to discern the border of radio frames to first mark of first the 3rd packet correspondence of radio frames, and at least one radio frames is sent to first radio frequency handling device of cascade; And S806, first radio frequency handling device of cascade is revised the radio frequency handling device sign and amended radio frequency handling device sign is sent to the next stage radio frequency handling device according to the link indication information.
Wherein, be set under the situation of first value at digital processing unit link indication information, radio frequency handling device is sent to the next stage radio frequency handling device after the radio frequency handling device sign is added 1; And be set under the situation of second value at digital processing unit link indication information, radio frequency handling device is sent to the next stage radio frequency handling device after the radio frequency handling device sign is subtracted 1.
By the present invention, can on TD-SCDMA, can realize the interface more flexible and efficient than CPRI.
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the structure chart of general cellular communication system;
Fig. 2 is the CPRI REC schematic diagram that (no cascade) is connected with RE;
Fig. 3 is the schematic diagram of CPRI agreement;
Fig. 4 is the definition of CPRI frame format;
Fig. 5 is the composition of CPRI subchannel;
Fig. 6 is the model according to the interface protocol of the embodiment of the invention;
Fig. 7 is the flow chart according to the communication means that is used for inside node of base station of the embodiment of the invention;
Fig. 8 is that the address of using in the method shown in Figure 7 is distributed and the flow chart of recognition methods automatically;
Fig. 9 is the schematic diagram of using on the 1.25Gbps interface according to the interface protocol of the embodiment of the invention;
Figure 10 is the Sub-Group internal form schematic diagram on the 1.25Gbps interface of being applied in according to the embodiment of the invention;
Figure 11 is the schematic diagram of using on the 2.5Gbps interface according to the interface protocol of the embodiment of the invention; And
Figure 12 is the Sub-Group internal form schematic diagram on the 2.5Gbps interface of being applied in according to the embodiment of the invention.
Embodiment
Below with reference to accompanying drawing, describe the specific embodiment of the present invention in detail.
The present invention has adopted different with CPRI but has belonged to the interface rate of same level with it (CPRI 1.2288Gbps and 1.25Gbps interface rate are same level, CPRI2.4576Gbps and 2.5Gbps interface rate same level), available bandwidth of IQ and bandwidth availability ratio are higher, thereby make in the selection of IQ capacity and bit wide more flexible.
The interface protocol that defines among the present invention divides three layers: physical layer (layer 1), link layer (layer 2) and application layer (layer 3).Interface model as shown in Figure 6.
Physical layer adopts optical fiber or cable transmission, supports two kinds of transmission rate: 1.25Gbps (with the 1.2288Gbps same level of CPRI), 2.5Gbps (with the 2.4576Gbps same level of CPRI).
Physical layer function comprises: to layer two provide IQ data and signaling data coffret, to data carry out that 8b/10b encoding and decoding, fibre circuit Bit clock recovery, 10ms radio frames are extracted, IQ data parity check and Block Error Rate reports, Time delay measurement, transmission interrupts detecting and invalid data insertion, cascade function and critical alarm report.
Link layer is divided into the IQ data processing and signaling data is handled two parts, two interface correspondences that provide with physical layer respectively, function comprises: the distribution of IQ data framing, RRU website identification code, generate signaling communication route, signaling frame framing, signaling data verification and signaling Flow Control according to RRU website identification code.
Application layer is divided into IQ data processing and OAM two parts, the distinct interface of respective links layer respectively, function comprises: this locality exchange of IQ data, IQ via configuration, delay parameter configuration, measure report, RRU equipment disposition, the processing of RRU alarm report, RRU software version management and resetting of RRU equipment restart.
Physical layer adopts the 8b/10b coding, and data sending terminal is encoded into 10 bits to 8 parallel Bit datas, then 10 Bit datas is converted to serial data and sends.Receiving terminal at first converts serial data to 10 bit parallel data, through the 8b/10b decoding, converts 10 Bit datas to 8 Bit datas then.In describing hereinafter, if not mentioned, then all be to be described with 8 bit bit wides before the 8b/10b coding.For 8 bit SerDes (serial/deserializer), can directly adopt corresponding description of the present invention, for 16 bit SerDes, only need be placed on first 8 bit on 15～8bit, second 8bit is placed on 7～0bit and gets final product.
For convenience, define an antenna carrier the container of sampled point IQ data be AxC (the present invention be not subjected to this title restriction, title is defined as AxC only for convenience of description), a RRU can take one or more AxC according to the antenna and the carrier data that dispose.For example, a RRU is 3 carrier waves, 4 antennas, single-time sampling (promptly having only an IQ data sampling point in 1 chip period), and then its AxC quantity that takies is 12.
With reference to figure 7, the communication means between BBU and the RRU is described.As shown in Figure 8, this communication means may further comprise the steps:
S702, transmitting terminal is formed first packet (being called Sub-Group here, the subdata cohort) with the digital baseband signal in the chip, wherein, does not comprise signaling information in first packet.And for the 1.25Gbps interface, a Sub-Group comprises 768 bits, and a Sub-Group comprises 1536 bits concerning 2.5Gbps.1 interior AxC of Sub-Group can distribute to a RRU, also can distribute to a plurality of RRU (situation of cascade).In the CPRI standard, a chip is formed a basic frame, but all comprises a control word in its each basic frame.And the Sub-Group in the present embodiment only comprises the IQ data.
In addition, transmitting terminal is formed second packet (being called Group here, the array cohort) with a plurality of first packets and a common channel signalling.Wherein, common channel signalling is used jointly by all RRU on the link, and common channel signalling is just used in the communication of Operation and Maintenance message between BBU and the RRU.Present embodiment is in the just additional common channel signalling of a plurality of Sub-Group (being a plurality of chips), and CPRI then is all additional control word of each chip, so the IQ data occupancy bandwidth utilization of present embodiment is than higher.
In addition, first mark, link dedicated signaling, far end radio frequency dedicated signaling and a plurality of second continuous packet that transmitting terminal also will be used to discern the border of second packet rearrange the 3rd packet in order and (are called Super-Group here, super array cohort), and with a plurality of the 3rd packets form a radio frames.Wherein, first mark (that is some bit Flag) is positioned at the forefront of Super-Group; The link dedicated signaling belongs to some bit signallings (it also comprises the RRU dedicated signaling), the allocated bandwidth that two kinds of signalings take does not separately limit at this, wherein, these some bit signallings are positioned at after the Flag, the link dedicated signaling is used for the maintenance and management of link, and the RRU dedicated signaling is used separately by each RRU; A plurality of continuous second packets (several Group) are positioned at after the signaling, and middle other data of nothing.
S704, transmitting terminal is processed into second mark (being called Frame-Flag here) being used to discern the border of radio frames to first mark of first the 3rd packet correspondence of radio frames, and at least one radio frames is sent to receiving terminal.That is to say that transmitting terminal is formed a 10ms frame to several Super-Group.Flag to first Super-Group correspondence of 10ms frame carries out special processing.Flag is used to discern the border of Super-Group, and Frame-Flag also is used for discerning the border of 10ms frame except the border of first Super-Group of being used to discern the 10ms frame.Flag and Frame-Flag include some bytes.Frame-Flag comprises special byte K28.5 (10111100b), the byte that resets (Reset, it is effective only BBU to be sent out the down link that RRU receives) and check byte (EC).Different with Frame-Flag is, Flag does not comprise spcial character K28.5, but comprises spcial character K23.7 (11110111b), and Flag equally also comprises Reset and EC, and its implication is identical with the implication of Frame-Flag respective byte.Spcial character is used to discern Flag and Frame-Flag.Reset is used for the reset operation of BBU to RRU, and EC is used for the IQ data of the previous Super-Group of verification.
S706, receiving terminal receives radio frames, and resolves radio frames according to first mark and second mark.That is to say that receiving terminal (can be RRU or BBU, down together) according to spcial character K28.5 search Frame-Flag, according to the border that Fram-Flag determines the 10ms frame, identifies a) each Super-Group then successively in the data flow that receives; B) link dedicated link signaling among the Super-Group and RRU dedicated signaling and a plurality of Group; C) a plurality of Sub-Group and the common channel signalling of each Group.
Wherein, first mark comprise following at least one: be used to discern first mark special byte K23.7, be used to carry out the check byte that resets byte and be used for the digital baseband signal of previous first packet of verification of reset operation.
Wherein, determine according to the value of the bit n of all bytes of the bit n of the check byte in first mark or second mark and previous first packet whether previous first packet is correct, wherein, n=0～7, n is an integer.That is to say, Frame-Flag and Flag have a check byte EC, EC is used for the IQ data of the previous Super-Group of verification, and method is that all values of bit n of the bit n (n=0～7) of EC and previous all bytes of Super-Group are odd number for the number of " 1b ".
Under the situation of operate as normal, transmitting terminal all is set to first value with the byte that resets in first mark and second mark, and expression does not reset.Under the situation that needs reset, the byte that resets in transmitting terminal first mark and second mark is set to second value, expression need reset, receiving terminal is under the situation of second value the m that receives the byte that resets, the byte that will reset is forwarded to the cascade port horizontal reset of going forward side by side, wherein, m is a positive integer; Wherein, transmitting terminal is a digital processing unit, and receiving terminal is a radio frequency handling device.Particularly, Reset byte agreement " 11111111b " expression among Frame-Flag and the Flag resets, and " 00000000b " expression does not reset.The Reset of BBU sends " 00000000b " always during operate as normal.When BBU requires RRU to reset, at least continuous 10 Reset bytes are filled into " 11111111b ".RRU judges in continuous 5 the Reset bytes receive, is " 11111111b " if 3 and above Reset oneself are arranged, and then this RRU is forwarded to cascade port to Reset oneself, resets then.
Wherein, the message that detects from digital processing unit at radio frequency handling device carries under the situation of the digital processing unit sign identical with its sign, and radio frequency handling device determines that message is the message that sends to it; Under different situations, radio frequency handling device is transmitted message.The link dedicated signaling comprises the operation and maintenance sign that is used to represent message transmission destination, identify under the situation identical with its sign in the operation and maintenance that radio frequency handling device carries from the message that digital processing unit receives, radio frequency handling device is just to digital processing unit transmit operation maintain message.Wherein, radio frames is the 10ms frame.
Particularly, the Operation and Maintenance message communicating between BBU and the RRU comprises that the communication of Operation and Maintenance message between following content: BBU and the RRU uses shared signaling.BBU sends out the downlink communication that RRU receives, and RRU only needs to carry RRU ID according to BBU transmission message and judges, if identical with the RRU ID of this RRU, then be the message of issuing this RRU, if different, then forwarding gets final product by all means.RRU sends out the communication that BBU receives, and under the situation of cascade, uses shared signaling to send message simultaneously owing to have a plurality of RRU, then might produce conflict.Method is fixed byte OAM ID in link dedicated signaling Rio, when the OAM ID that sends as BBU is identical with the ID of this RRU, just allow this RRU to send to the Operation and Maintenance message of BBU, control by BBU like this, produce conflict thereby avoid a plurality of RRU to send message.
With reference to figure 8, the address distribution and the recognition methods automatically of using in the method shown in Figure 7 is described.As shown in Figure 8, the automatic method of distributing and discerning in this address may further comprise the steps:
S802, digital processing unit is formed first packet with the digital baseband signal in the chip, does not comprise signaling information in first packet; Transmitting terminal is formed second packet with a plurality of first packets and a common channel signalling; First mark, link dedicated signaling, far end radio frequency dedicated signaling and a plurality of second continuous packet that transmitting terminal will be used to discern the border of second packet rearrange the 3rd packet in order, and with radio frames of a plurality of the 3rd packets compositions, wherein, the link dedicated signaling comprises radio frequency handling device sign and link indication information.
S804, digital processing unit is processed into second mark being used to discern the border of radio frames to first mark of first the 3rd packet correspondence of radio frames, and at least one radio frames is sent to first radio frequency handling device of cascade.
S806, first radio frequency handling device of cascade is revised the radio frequency handling device sign and amended radio frequency handling device sign is sent to the next stage radio frequency handling device according to the link indication information.
Wherein, be set under the situation of first value at digital processing unit link indication information, radio frequency handling device is sent to the next stage radio frequency handling device after the radio frequency handling device sign is added 1; And be set under the situation of second value at digital processing unit link indication information, radio frequency handling device is sent to the next stage radio frequency handling device after the radio frequency handling device sign is subtracted 1.
Particularly, a fixed byte is RRU ID (a RRU sign, or RRU address) in link dedicated signaling Rio, and arranging a byte in addition is Link Ind (link indication).RRUID is used for identifying when BBU communicates by letter with RRU the address of RRU.BBU inserts initial value in the position of RRU ID, as " 1 ", and sends to a RRU of cascade.First RRU is receiving the RRU ID of RRU ID as oneself.If first RRU judges the Link Ind " 1 " that receives, then RRU sends to next stage RRU after RRU ID is added 1, as the sign of next stage RRU.If judge Link Ind " if 0 ", send to next stage RRU after then RRU ID being subtracted 1, as the sign of next stage RRU.Next stage RRU carries out identical operations, and the like.
With reference to figure 9, the application of interface protocol on the 1.25Gbps interface according to the embodiment of the invention is described.
As shown in Figure 9, it is K28.5 that 7 bytes are arranged among the Fram-Flag, 1 Reset byte and 1 EC byte.It is K23.7 that 7 bytes are arranged among the Flag, 1 Reset byte and 1 EC byte.
The internal form definition of Sub-Group as shown in figure 10.At this, the figure place of I and Q all is 16 bits, and 1 AxC promptly comprises 16 bit I and 16 bit Q.It is a special case that IQ adopts 16 bits, and the present invention does not limit and adopts other figure place.A Sub-Group comprises 24 AxC, totally 768 Bit datas.A plurality of AxC number consecutively from front to back are AxC0～AxC23.The most-significant byte of AxCm IH shown in Figure 10 (m=0～23) expression I data, the least-significant byte of AxCm IL (m=0～23) expression I data; The most-significant byte of AxCm QH (m=0～23) expression Q data, the least-significant byte of AxCm QL (m=0～23) expression Q data.
A Group comprises 16 Sub-Group and 24*8 bit common channel signalling, and Sub-Group is numbered Sub-Group0～Sub-Group 15.A Super-Group comprises: 8*8 bit Flag; 12*8 bit signalling, signaling are divided into link dedicated signaling and RRU dedicated signaling, and wherein the link dedicated signaling takies the 4*8 bit, and the RRU dedicated signaling takies the 8*8 bit; 8 Group number Group0～Group7 from front to back respectively.A 10ms frame is made up of 100 Super-Group, and number consecutively is Super-Group0～Super-Group99 from front to back.
The shared signaling of RRU, link dedicated signaling and RRU dedicated signaling can define according to the needs of using.Table 1 has provided an example of link dedicated signaling definition.As previously mentioned, have 4 bytes to be used for the link dedicated signaling among each Super-Group, have 400 bytes in each 10ms frame, be numbered 0-399, the 1st byte of Super-Group0 link dedicated signaling is 0, other number consecutivelies.Link dedicated signaling part is defined as follows shown in the table 1.
According to the 1.25Gbps interface protocol, the total bandwidth that the IQ data can take is 768 * 16 * 8 * 100 * 100=983.04Mbps, and the ratio that accounts for the link total bandwidth is 0.98304/1.25=78.64%.And the total bandwidth that CPRI 1.2288Gbps interface IQ data can take is 921.6Mbps, and the ratio that accounts for its link total bandwidth is 0.9216/1.2288=75%.As seen, no matter the present invention is the total bandwidth that IQ can use, or the IQ total bandwidth accounts for link total bandwidth ratio, all than the corresponding numerical value height of CPRI.
For the interface of 2.5Gbps, an instantiation of the interface protocol of present embodiment as shown in figure 11, it is identical that basic skills and aforementioned invention are described, below only at the explanation that makes an explanation of this example each several part:
Flag is identical with 1.25Gbps interface content corresponding with Frame-Flag.The internal form definition of Sub-Group as shown in figure 12.At this, the figure place of I and Q all is 16 bits, and 1 AxC promptly comprises 16 bit I and 16 bit Q.It is a special case that IQ adopts 16 bits, and the present invention does not limit and adopts other figure place.A Sub-Group comprises 48 AxC, totally 1536 Bit datas.A plurality of AxC number consecutively from front to back are AxC0～AxC47.The most-significant byte of AxCm IH shown in Figure 12 (m=0～47) expression I data, the least-significant byte of AxCm IL (m=0～47) expression I data; The most-significant byte of AxCm QH (m=0～47) expression Q data, the least-significant byte of AxCm QL (m=0～47) expression Q data.
A Group comprises 8 Sub-Group and 24*8 bit common channel signalling, and Sub-Group is numbered Sub-Group0～Sub-Group7.A Super-Group comprises: 8*8 bit Flag; 12*8 bit signalling, signaling are divided into link dedicated signaling and RRU dedicated signaling, and wherein the link dedicated signaling takies the 4*8 bit, and the RRU dedicated signaling takies the 8*8 bit; 8 Group number Group0～Group7 from front to back respectively.A 10ms frame is made up of 200 Super-Group, and number consecutively is Super-Group0～Super-Group199 from front to back.The shared signaling of RRU, link dedicated signaling and RRU dedicated signaling can define according to the needs of using.
As previously mentioned, have 4 bytes to be used for the link dedicated signaling among each Super-Group, have 800 bytes in each 10ms frame, be numbered 0-799, the 1st byte of Super-Group0 link dedicated signaling is 0, other number consecutivelies.
The definition of link dedicated signaling part is identical with the 1.25Gbps appropriate section, and just total byte number is 800 in the 10ms, and is as shown in table 1.According to the 2.5Gbps interface protocol, the total bandwidth that the IQ data can take is 1536 * 8 * 8 * 200 * 100=1.96608Gbps, and the ratio that accounts for the link total bandwidth is 1.96608/2.5=78.64%.And the total bandwidth that CPRI 2.4576Gbps interface IQ data can take is 1.8432Gbps, and the ratio that accounts for its link total bandwidth is 1.8432/2.4576=75%.As seen, no matter the present invention is the total bandwidth that IQ can use, or the IQ total bandwidth accounts for link total bandwidth ratio, all than the corresponding numerical value height of CPRI.
The above is the preferred embodiments of the present invention only, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.Within the spirit and principles in the present invention all, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (11)
1. a communication means that is used for inside node of base station is characterized in that, may further comprise the steps:
S702, transmitting terminal is formed first packet with the digital baseband signal in the chip, wherein, does not comprise signaling information in described first packet; Described transmitting terminal is formed second packet with described a plurality of first packets and a common channel signalling; First mark, link dedicated signaling, far end radio frequency dedicated signaling and a plurality of second continuous packet that described transmitting terminal will be used to discern the border of described second packet rearrange the 3rd packet in order, and will radio frames of a plurality of described the 3rd packets compositions;
S704, described transmitting terminal is processed into second mark being used to discern the border of described radio frames with first mark of first the 3rd packet correspondence of described radio frames, and at least one described radio frames is sent to receiving terminal; And
S706, described receiving terminal receives described radio frames, and resolves described radio frames according to described first mark and described second mark.
2. communication means according to claim 1 is characterized in that, described inside node of base station comprise following at least one: digital processing unit and radio frequency handling device.
3. communication means according to claim 2, it is characterized in that, described second mark comprise following at least one: be used to discern described second mark special byte K28.5, be used to carry out the check byte that resets byte and be used for the digital baseband signal of previous first packet of verification of reset operation.
4. communication means according to claim 2, it is characterized in that, described first mark comprise following at least one: be used to discern described first mark special byte K23.7, be used to carry out the check byte that resets byte and be used for the digital baseband signal of previous first packet of verification of reset operation.
5. according to claim 3 or 4 described communication meanss, it is characterized in that, value according to the bit n of all bytes of the bit n of the check byte in described first mark or described second mark and previous first packet determines whether described previous first packet is correct, wherein, n=0～7, n is an integer.
6. according to claim 3 or 4 described communication meanss, it is characterized in that:
Under the situation of operate as normal, described transmitting terminal all is set to first value with the byte that resets in described first mark and described second mark, and expression does not reset; And
Under the situation that needs reset, the byte that resets in described first mark of described transmitting terminal and described second mark is set to second value, expression need reset, described receiving terminal is under the situation of second value the m that receives the byte that resets, the byte that will reset is forwarded to the cascade port horizontal reset of going forward side by side, wherein, m is a positive integer;
Wherein, described transmitting terminal is described digital processing unit, and described receiving terminal is described radio frequency handling device.
7. according to claim 3 or 4 described communication meanss, it is characterized in that, the message that detects from described digital processing unit at described radio frequency handling device carries under the situation of the digital processing unit sign identical with its sign, and described radio frequency handling device determines that described message is the message that sends to it; Under different situations, described radio frequency handling device is transmitted described message.
8. communication means according to claim 7, it is characterized in that, described link dedicated signaling comprises the operation and maintenance sign that is used to represent message transmission destination, identify under the situation identical with its sign in the operation and maintenance that described radio frequency handling device carries from the message that described digital processing unit receives, described radio frequency handling device is just to described digital processing unit transmit operation maintain message.
According to Claim 8 in each described communication means, it is characterized in that described radio frames is the 10ms frame.
10. an address that is used for radio frequency handling device is distributed and recognition methods automatically, it is characterized in that, may further comprise the steps:
S802, described digital processing unit is formed first packet with the digital baseband signal in the chip, does not comprise signaling information in described first packet; Described transmitting terminal is formed second packet with described a plurality of first packets and a common channel signalling;
First mark, link dedicated signaling, far end radio frequency dedicated signaling and a plurality of second continuous packet that described transmitting terminal will be used to discern the border of described second packet rearrange the 3rd packet in order, and with radio frames of a plurality of described the 3rd packets compositions, wherein, described link dedicated signaling comprises radio frequency handling device sign and link indication information;
S804, described digital processing unit is processed into second mark being used to discern the border of described radio frames to first mark of first the 3rd packet correspondence of described radio frames, and at least one described radio frames is sent to first radio frequency handling device of cascade; And
S806, first radio frequency handling device of described cascade is revised described radio frequency handling device sign and amended radio frequency handling device sign is sent to the next stage radio frequency handling device according to described link indication information.
11. address according to claim 10 is distributed and recognition methods automatically, it is characterized in that:
Be set under the situation of first value at the described link indication information of described digital processing unit, described radio frequency handling device is sent to the next stage radio frequency handling device after described radio frequency handling device sign is added 1; And
Be set under the situation of second value at the described link indication information of described digital processing unit, described radio frequency handling device is sent to the next stage radio frequency handling device after described radio frequency handling device sign is subtracted 1.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103493582A (en) * | 2011-05-12 | 2014-01-01 | 华为技术有限公司 | Base station |
| WO2017008401A1 (en) * | 2015-07-10 | 2017-01-19 | 华为技术有限公司 | Protocol frame transmission method and device, node equipment and system |
| CN110012459A (en) * | 2019-04-16 | 2019-07-12 | 深圳凡维泰科技服务有限公司 | Address distribution method and address allocation system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100403822C (en) * | 2005-06-30 | 2008-07-16 | 华为技术有限公司 | Adaptive rate consulting device and method |
| CN1859396A (en) * | 2006-02-06 | 2006-11-08 | 华为技术有限公司 | Method for transmitting multiple system radio service data by general radio interface |
-
2007
- 2007-04-28 CN CN2007100972554A patent/CN101296390B/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103493582A (en) * | 2011-05-12 | 2014-01-01 | 华为技术有限公司 | Base station |
| WO2017008401A1 (en) * | 2015-07-10 | 2017-01-19 | 华为技术有限公司 | Protocol frame transmission method and device, node equipment and system |
| CN110012459A (en) * | 2019-04-16 | 2019-07-12 | 深圳凡维泰科技服务有限公司 | Address distribution method and address allocation system |
| CN110012459B (en) * | 2019-04-16 | 2021-10-01 | 深圳凡维泰科技服务有限公司 | Address allocation method and address allocation system |
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| CN101296390B (en) | 2012-02-08 |
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